diff --git a/AUTHORS b/AUTHORS index 48ce71f4cc..95d3158d20 100644 --- a/AUTHORS +++ b/AUTHORS @@ -41,7 +41,7 @@ Aeneas Rekkas (arekkas) Afanasev Stanislav Agis Anastasopoulos Agniva De Sarker -Ahmed Wahed +Ahmed W. Mones Ahmet Soormally Ahmy Yulrizka Aiden Scandella diff --git a/CONTRIBUTORS b/CONTRIBUTORS index 6c7262adb1..ee50a4c049 100644 --- a/CONTRIBUTORS +++ b/CONTRIBUTORS @@ -67,7 +67,7 @@ Aeneas Rekkas (arekkas) Afanasev Stanislav Agis Anastasopoulos Agniva De Sarker -Ahmed Wahed +Ahmed W. Mones Ahmet Alp Balkan Ahmet Soormally Ahmy Yulrizka diff --git a/api/go1.17.txt b/api/go1.17.txt new file mode 100644 index 0000000000..48505381f1 --- /dev/null +++ b/api/go1.17.txt @@ -0,0 +1,195 @@ +pkg archive/zip, method (*File) OpenRaw() (io.Reader, error) +pkg archive/zip, method (*Writer) Copy(*File) error +pkg archive/zip, method (*Writer) CreateRaw(*FileHeader) (io.Writer, error) +pkg compress/lzw, method (*Reader) Close() error +pkg compress/lzw, method (*Reader) Read([]uint8) (int, error) +pkg compress/lzw, method (*Reader) Reset(io.Reader, Order, int) +pkg compress/lzw, method (*Writer) Close() error +pkg compress/lzw, method (*Writer) Reset(io.Writer, Order, int) +pkg compress/lzw, method (*Writer) Write([]uint8) (int, error) +pkg compress/lzw, type Reader struct +pkg compress/lzw, type Writer struct +pkg crypto/tls, method (*CertificateRequestInfo) Context() context.Context +pkg crypto/tls, method (*ClientHelloInfo) Context() context.Context +pkg crypto/tls, method (*Conn) HandshakeContext(context.Context) error +pkg database/sql, method (*NullByte) Scan(interface{}) error +pkg database/sql, method (*NullInt16) Scan(interface{}) error +pkg database/sql, method (NullByte) Value() (driver.Value, error) +pkg database/sql, method (NullInt16) Value() (driver.Value, error) +pkg database/sql, type NullByte struct +pkg database/sql, type NullByte struct, Byte uint8 +pkg database/sql, type NullByte struct, Valid bool +pkg database/sql, type NullInt16 struct +pkg database/sql, type NullInt16 struct, Int16 int16 +pkg database/sql, type NullInt16 struct, Valid bool +pkg debug/elf, const SHT_MIPS_ABIFLAGS = 1879048234 +pkg debug/elf, const SHT_MIPS_ABIFLAGS SectionType +pkg encoding/csv, method (*Reader) FieldPos(int) (int, int) +pkg go/build, type Context struct, ToolTags []string +pkg go/parser, const SkipObjectResolution = 64 +pkg go/parser, const SkipObjectResolution Mode +pkg image, method (*Alpha) RGBA64At(int, int) color.RGBA64 +pkg image, method (*Alpha) SetRGBA64(int, int, color.RGBA64) +pkg image, method (*Alpha16) RGBA64At(int, int) color.RGBA64 +pkg image, method (*Alpha16) SetRGBA64(int, int, color.RGBA64) +pkg image, method (*CMYK) RGBA64At(int, int) color.RGBA64 +pkg image, method (*CMYK) SetRGBA64(int, int, color.RGBA64) +pkg image, method (*Gray) RGBA64At(int, int) color.RGBA64 +pkg image, method (*Gray) SetRGBA64(int, int, color.RGBA64) +pkg image, method (*Gray16) RGBA64At(int, int) color.RGBA64 +pkg image, method (*Gray16) SetRGBA64(int, int, color.RGBA64) +pkg image, method (*NRGBA) RGBA64At(int, int) color.RGBA64 +pkg image, method (*NRGBA) SetRGBA64(int, int, color.RGBA64) +pkg image, method (*NRGBA64) RGBA64At(int, int) color.RGBA64 +pkg image, method (*NRGBA64) SetRGBA64(int, int, color.RGBA64) +pkg image, method (*NYCbCrA) RGBA64At(int, int) color.RGBA64 +pkg image, method (*Paletted) RGBA64At(int, int) color.RGBA64 +pkg image, method (*Paletted) SetRGBA64(int, int, color.RGBA64) +pkg image, method (*RGBA) RGBA64At(int, int) color.RGBA64 +pkg image, method (*RGBA) SetRGBA64(int, int, color.RGBA64) +pkg image, method (*Uniform) RGBA64At(int, int) color.RGBA64 +pkg image, method (*YCbCr) RGBA64At(int, int) color.RGBA64 +pkg image, method (Rectangle) RGBA64At(int, int) color.RGBA64 +pkg image, type RGBA64Image interface { At, Bounds, ColorModel, RGBA64At } +pkg image, type RGBA64Image interface, At(int, int) color.Color +pkg image, type RGBA64Image interface, Bounds() Rectangle +pkg image, type RGBA64Image interface, ColorModel() color.Model +pkg image, type RGBA64Image interface, RGBA64At(int, int) color.RGBA64 +pkg image/draw, type RGBA64Image interface { At, Bounds, ColorModel, RGBA64At, Set, SetRGBA64 } +pkg image/draw, type RGBA64Image interface, At(int, int) color.Color +pkg image/draw, type RGBA64Image interface, Bounds() image.Rectangle +pkg image/draw, type RGBA64Image interface, ColorModel() color.Model +pkg image/draw, type RGBA64Image interface, RGBA64At(int, int) color.RGBA64 +pkg image/draw, type RGBA64Image interface, Set(int, int, color.Color) +pkg image/draw, type RGBA64Image interface, SetRGBA64(int, int, color.RGBA64) +pkg io/fs, func FileInfoToDirEntry(FileInfo) DirEntry +pkg math, const MaxFloat64 = 1.79769e+308 // 179769313486231570814527423731704356798070567525844996598917476803157260780028538760589558632766878171540458953514382464234321326889464182768467546703537516986049910576551282076245490090389328944075868508455133942304583236903222948165808559332123348274797826204144723168738177180919299881250404026184124858368 +pkg math, const MaxInt = 9223372036854775807 +pkg math, const MaxInt ideal-int +pkg math, const MaxUint = 18446744073709551615 +pkg math, const MaxUint ideal-int +pkg math, const MinInt = -9223372036854775808 +pkg math, const MinInt ideal-int +pkg math, const SmallestNonzeroFloat32 = 1.4013e-45 // 1/713623846352979940529142984724747568191373312 +pkg math, const SmallestNonzeroFloat64 = 4.94066e-324 // 1/202402253307310618352495346718917307049556649764142118356901358027430339567995346891960383701437124495187077864316811911389808737385793476867013399940738509921517424276566361364466907742093216341239767678472745068562007483424692698618103355649159556340810056512358769552333414615230502532186327508646006263307707741093494784 +pkg net, method (*ParseError) Temporary() bool +pkg net, method (*ParseError) Timeout() bool +pkg net, method (IP) IsPrivate() bool +pkg net/http, func AllowQuerySemicolons(Handler) Handler +pkg net/url, method (Values) Has(string) bool +pkg reflect, func VisibleFields(Type) []StructField +pkg reflect, method (Method) IsExported() bool +pkg reflect, method (StructField) IsExported() bool +pkg reflect, method (Value) CanConvert(Type) bool +pkg runtime/cgo (darwin-amd64-cgo), func NewHandle(interface{}) Handle +pkg runtime/cgo (darwin-amd64-cgo), method (Handle) Delete() +pkg runtime/cgo (darwin-amd64-cgo), method (Handle) Value() interface{} +pkg runtime/cgo (darwin-amd64-cgo), type Handle uintptr +pkg runtime/cgo (freebsd-386-cgo), func NewHandle(interface{}) Handle +pkg runtime/cgo (freebsd-386-cgo), method (Handle) Delete() +pkg runtime/cgo (freebsd-386-cgo), method (Handle) Value() interface{} +pkg runtime/cgo (freebsd-386-cgo), type Handle uintptr +pkg runtime/cgo (freebsd-amd64-cgo), func NewHandle(interface{}) Handle +pkg runtime/cgo (freebsd-amd64-cgo), method (Handle) Delete() +pkg runtime/cgo (freebsd-amd64-cgo), method (Handle) Value() interface{} +pkg runtime/cgo (freebsd-amd64-cgo), type Handle uintptr +pkg runtime/cgo (freebsd-arm-cgo), func NewHandle(interface{}) Handle +pkg runtime/cgo (freebsd-arm-cgo), method (Handle) Delete() +pkg runtime/cgo (freebsd-arm-cgo), method (Handle) Value() interface{} +pkg runtime/cgo (freebsd-arm-cgo), type Handle uintptr +pkg runtime/cgo (linux-386-cgo), func NewHandle(interface{}) Handle +pkg runtime/cgo (linux-386-cgo), method (Handle) Delete() +pkg runtime/cgo (linux-386-cgo), method (Handle) Value() interface{} +pkg runtime/cgo (linux-386-cgo), type Handle uintptr +pkg runtime/cgo (linux-amd64-cgo), func NewHandle(interface{}) Handle +pkg runtime/cgo (linux-amd64-cgo), method (Handle) Delete() +pkg runtime/cgo (linux-amd64-cgo), method (Handle) Value() interface{} +pkg runtime/cgo (linux-amd64-cgo), type Handle uintptr +pkg runtime/cgo (linux-arm-cgo), func NewHandle(interface{}) Handle +pkg runtime/cgo (linux-arm-cgo), method (Handle) Delete() +pkg runtime/cgo (linux-arm-cgo), method (Handle) Value() interface{} +pkg runtime/cgo (linux-arm-cgo), type Handle uintptr +pkg runtime/cgo (netbsd-386-cgo), func NewHandle(interface{}) Handle +pkg runtime/cgo (netbsd-386-cgo), method (Handle) Delete() +pkg runtime/cgo (netbsd-386-cgo), method (Handle) Value() interface{} +pkg runtime/cgo (netbsd-386-cgo), type Handle uintptr +pkg runtime/cgo (netbsd-amd64-cgo), func NewHandle(interface{}) Handle +pkg runtime/cgo (netbsd-amd64-cgo), method (Handle) Delete() +pkg runtime/cgo (netbsd-amd64-cgo), method (Handle) Value() interface{} +pkg runtime/cgo (netbsd-amd64-cgo), type Handle uintptr +pkg runtime/cgo (netbsd-arm-cgo), func NewHandle(interface{}) Handle +pkg runtime/cgo (netbsd-arm-cgo), method (Handle) Delete() +pkg runtime/cgo (netbsd-arm-cgo), method (Handle) Value() interface{} +pkg runtime/cgo (netbsd-arm-cgo), type Handle uintptr +pkg runtime/cgo (netbsd-arm64-cgo), func NewHandle(interface{}) Handle +pkg runtime/cgo (netbsd-arm64-cgo), method (Handle) Delete() +pkg runtime/cgo (netbsd-arm64-cgo), method (Handle) Value() interface{} +pkg runtime/cgo (netbsd-arm64-cgo), type Handle uintptr +pkg runtime/cgo (openbsd-386-cgo), func NewHandle(interface{}) Handle +pkg runtime/cgo (openbsd-386-cgo), method (Handle) Delete() +pkg runtime/cgo (openbsd-386-cgo), method (Handle) Value() interface{} +pkg runtime/cgo (openbsd-386-cgo), type Handle uintptr +pkg runtime/cgo (openbsd-amd64-cgo), func NewHandle(interface{}) Handle +pkg runtime/cgo (openbsd-amd64-cgo), method (Handle) Delete() +pkg runtime/cgo (openbsd-amd64-cgo), method (Handle) Value() interface{} +pkg runtime/cgo (openbsd-amd64-cgo), type Handle uintptr +pkg strconv, func QuotedPrefix(string) (string, error) +pkg sync/atomic, method (*Value) CompareAndSwap(interface{}, interface{}) bool +pkg sync/atomic, method (*Value) Swap(interface{}) interface{} +pkg syscall (netbsd-386), const SYS_WAIT6 = 481 +pkg syscall (netbsd-386), const SYS_WAIT6 ideal-int +pkg syscall (netbsd-386), const WEXITED = 32 +pkg syscall (netbsd-386), const WEXITED ideal-int +pkg syscall (netbsd-386-cgo), const SYS_WAIT6 = 481 +pkg syscall (netbsd-386-cgo), const SYS_WAIT6 ideal-int +pkg syscall (netbsd-386-cgo), const WEXITED = 32 +pkg syscall (netbsd-386-cgo), const WEXITED ideal-int +pkg syscall (netbsd-amd64), const SYS_WAIT6 = 481 +pkg syscall (netbsd-amd64), const SYS_WAIT6 ideal-int +pkg syscall (netbsd-amd64), const WEXITED = 32 +pkg syscall (netbsd-amd64), const WEXITED ideal-int +pkg syscall (netbsd-amd64-cgo), const SYS_WAIT6 = 481 +pkg syscall (netbsd-amd64-cgo), const SYS_WAIT6 ideal-int +pkg syscall (netbsd-amd64-cgo), const WEXITED = 32 +pkg syscall (netbsd-amd64-cgo), const WEXITED ideal-int +pkg syscall (netbsd-arm), const SYS_WAIT6 = 481 +pkg syscall (netbsd-arm), const SYS_WAIT6 ideal-int +pkg syscall (netbsd-arm), const WEXITED = 32 +pkg syscall (netbsd-arm), const WEXITED ideal-int +pkg syscall (netbsd-arm-cgo), const SYS_WAIT6 = 481 +pkg syscall (netbsd-arm-cgo), const SYS_WAIT6 ideal-int +pkg syscall (netbsd-arm-cgo), const WEXITED = 32 +pkg syscall (netbsd-arm-cgo), const WEXITED ideal-int +pkg syscall (netbsd-arm64), const SYS_WAIT6 = 481 +pkg syscall (netbsd-arm64), const SYS_WAIT6 ideal-int +pkg syscall (netbsd-arm64), const WEXITED = 32 +pkg syscall (netbsd-arm64), const WEXITED ideal-int +pkg syscall (netbsd-arm64-cgo), const SYS_WAIT6 = 481 +pkg syscall (netbsd-arm64-cgo), const SYS_WAIT6 ideal-int +pkg syscall (netbsd-arm64-cgo), const WEXITED = 32 +pkg syscall (netbsd-arm64-cgo), const WEXITED ideal-int +pkg syscall (openbsd-386), const MSG_CMSG_CLOEXEC = 2048 +pkg syscall (openbsd-386), const MSG_CMSG_CLOEXEC ideal-int +pkg syscall (openbsd-386-cgo), const MSG_CMSG_CLOEXEC = 2048 +pkg syscall (openbsd-386-cgo), const MSG_CMSG_CLOEXEC ideal-int +pkg syscall (openbsd-amd64), const MSG_CMSG_CLOEXEC = 2048 +pkg syscall (openbsd-amd64), const MSG_CMSG_CLOEXEC ideal-int +pkg syscall (openbsd-amd64-cgo), const MSG_CMSG_CLOEXEC = 2048 +pkg syscall (openbsd-amd64-cgo), const MSG_CMSG_CLOEXEC ideal-int +pkg syscall (windows-386), type SysProcAttr struct, AdditionalInheritedHandles []Handle +pkg syscall (windows-386), type SysProcAttr struct, ParentProcess Handle +pkg syscall (windows-amd64), type SysProcAttr struct, AdditionalInheritedHandles []Handle +pkg syscall (windows-amd64), type SysProcAttr struct, ParentProcess Handle +pkg testing, method (*B) Setenv(string, string) +pkg testing, method (*T) Setenv(string, string) +pkg testing, type TB interface, Setenv(string, string) +pkg text/template/parse, const SkipFuncCheck = 2 +pkg text/template/parse, const SkipFuncCheck Mode +pkg time, const Layout = "01/02 03:04:05PM '06 -0700" +pkg time, const Layout ideal-string +pkg time, func UnixMicro(int64) Time +pkg time, func UnixMilli(int64) Time +pkg time, method (Time) GoString() string +pkg time, method (Time) IsDST() bool +pkg time, method (Time) UnixMicro() int64 +pkg time, method (Time) UnixMilli() int64 diff --git a/api/next.txt b/api/next.txt index 9e996005c6..e69de29bb2 100644 --- a/api/next.txt +++ b/api/next.txt @@ -1,99 +0,0 @@ -pkg compress/lzw, method (*Reader) Close() error -pkg compress/lzw, method (*Reader) Read([]uint8) (int, error) -pkg compress/lzw, method (*Reader) Reset(io.Reader, Order, int) -pkg compress/lzw, method (*Writer) Close() error -pkg compress/lzw, method (*Writer) Reset(io.Writer, Order, int) -pkg compress/lzw, method (*Writer) Write([]uint8) (int, error) -pkg compress/lzw, type Reader struct -pkg compress/lzw, type Writer struct -pkg crypto/tls, method (*CertificateRequestInfo) Context() context.Context -pkg crypto/tls, method (*ClientHelloInfo) Context() context.Context -pkg crypto/tls, method (*Conn) HandshakeContext(context.Context) error -pkg debug/elf, const SHT_MIPS_ABIFLAGS = 1879048234 -pkg debug/elf, const SHT_MIPS_ABIFLAGS SectionType -pkg encoding/csv, method (*Reader) FieldPos(int) (int, int) -pkg go/ast, method (*FuncDecl) IsMethod() bool -pkg go/build, type Context struct, ToolTags []string -pkg go/parser, const SkipObjectResolution = 64 -pkg go/parser, const SkipObjectResolution Mode -pkg go/types, type Config struct, GoVersion string -pkg io/fs, func FileInfoToDirEntry(FileInfo) DirEntry -pkg net, method (*ParseError) Temporary() bool -pkg net, method (*ParseError) Timeout() bool -pkg net, method (IP) IsPrivate() bool -pkg reflect, func VisibleFields(Type) []StructField -pkg reflect, method (Method) IsExported() bool -pkg reflect, method (StructField) IsExported() bool -pkg runtime/cgo (darwin-amd64-cgo), func NewHandle(interface{}) Handle -pkg runtime/cgo (darwin-amd64-cgo), method (Handle) Delete() -pkg runtime/cgo (darwin-amd64-cgo), method (Handle) Value() interface{} -pkg runtime/cgo (darwin-amd64-cgo), type Handle uintptr -pkg runtime/cgo (freebsd-386-cgo), func NewHandle(interface{}) Handle -pkg runtime/cgo (freebsd-386-cgo), method (Handle) Delete() -pkg runtime/cgo (freebsd-386-cgo), method (Handle) Value() interface{} -pkg runtime/cgo (freebsd-386-cgo), type Handle uintptr -pkg runtime/cgo (freebsd-amd64-cgo), func NewHandle(interface{}) Handle -pkg runtime/cgo (freebsd-amd64-cgo), method (Handle) Delete() -pkg runtime/cgo (freebsd-amd64-cgo), method (Handle) Value() interface{} -pkg runtime/cgo (freebsd-amd64-cgo), type Handle uintptr -pkg runtime/cgo (freebsd-arm-cgo), func NewHandle(interface{}) Handle -pkg runtime/cgo (freebsd-arm-cgo), method (Handle) Delete() -pkg runtime/cgo (freebsd-arm-cgo), method (Handle) Value() interface{} -pkg runtime/cgo (freebsd-arm-cgo), type Handle uintptr -pkg runtime/cgo (linux-386-cgo), func NewHandle(interface{}) Handle -pkg runtime/cgo (linux-386-cgo), method (Handle) Delete() -pkg runtime/cgo (linux-386-cgo), method (Handle) Value() interface{} -pkg runtime/cgo (linux-386-cgo), type Handle uintptr -pkg runtime/cgo (linux-amd64-cgo), func NewHandle(interface{}) Handle -pkg runtime/cgo (linux-amd64-cgo), method (Handle) Delete() -pkg runtime/cgo (linux-amd64-cgo), method (Handle) Value() interface{} -pkg runtime/cgo (linux-amd64-cgo), type Handle uintptr -pkg runtime/cgo (linux-arm-cgo), func NewHandle(interface{}) Handle -pkg runtime/cgo (linux-arm-cgo), method (Handle) Delete() -pkg runtime/cgo (linux-arm-cgo), method (Handle) Value() interface{} -pkg runtime/cgo (linux-arm-cgo), type Handle uintptr -pkg runtime/cgo (netbsd-386-cgo), func NewHandle(interface{}) Handle -pkg runtime/cgo (netbsd-386-cgo), method (Handle) Delete() -pkg runtime/cgo (netbsd-386-cgo), method (Handle) Value() interface{} -pkg runtime/cgo (netbsd-386-cgo), type Handle uintptr -pkg runtime/cgo (netbsd-amd64-cgo), func NewHandle(interface{}) Handle -pkg runtime/cgo (netbsd-amd64-cgo), method (Handle) Delete() -pkg runtime/cgo (netbsd-amd64-cgo), method (Handle) Value() interface{} -pkg runtime/cgo (netbsd-amd64-cgo), type Handle uintptr -pkg runtime/cgo (netbsd-arm-cgo), func NewHandle(interface{}) Handle -pkg runtime/cgo (netbsd-arm-cgo), method (Handle) Delete() -pkg runtime/cgo (netbsd-arm-cgo), method (Handle) Value() interface{} -pkg runtime/cgo (netbsd-arm-cgo), type Handle uintptr -pkg runtime/cgo (netbsd-arm64-cgo), func NewHandle(interface{}) Handle -pkg runtime/cgo (netbsd-arm64-cgo), method (Handle) Delete() -pkg runtime/cgo (netbsd-arm64-cgo), method (Handle) Value() interface{} -pkg runtime/cgo (netbsd-arm64-cgo), type Handle uintptr -pkg runtime/cgo (openbsd-386-cgo), func NewHandle(interface{}) Handle -pkg runtime/cgo (openbsd-386-cgo), method (Handle) Delete() -pkg runtime/cgo (openbsd-386-cgo), method (Handle) Value() interface{} -pkg runtime/cgo (openbsd-386-cgo), type Handle uintptr -pkg runtime/cgo (openbsd-amd64-cgo), func NewHandle(interface{}) Handle -pkg runtime/cgo (openbsd-amd64-cgo), method (Handle) Delete() -pkg runtime/cgo (openbsd-amd64-cgo), method (Handle) Value() interface{} -pkg runtime/cgo (openbsd-amd64-cgo), type Handle uintptr -pkg syscall (openbsd-386), const MSG_CMSG_CLOEXEC = 2048 -pkg syscall (openbsd-386), const MSG_CMSG_CLOEXEC ideal-int -pkg syscall (openbsd-386-cgo), const MSG_CMSG_CLOEXEC = 2048 -pkg syscall (openbsd-386-cgo), const MSG_CMSG_CLOEXEC ideal-int -pkg syscall (openbsd-amd64), const MSG_CMSG_CLOEXEC = 2048 -pkg syscall (openbsd-amd64), const MSG_CMSG_CLOEXEC ideal-int -pkg syscall (openbsd-amd64-cgo), const MSG_CMSG_CLOEXEC = 2048 -pkg syscall (openbsd-amd64-cgo), const MSG_CMSG_CLOEXEC ideal-int -pkg syscall (windows-386), type SysProcAttr struct, AdditionalInheritedHandles []Handle -pkg syscall (windows-386), type SysProcAttr struct, ParentProcess Handle -pkg syscall (windows-amd64), type SysProcAttr struct, AdditionalInheritedHandles []Handle -pkg syscall (windows-amd64), type SysProcAttr struct, ParentProcess Handle -pkg testing, method (*B) Setenv(string, string) -pkg testing, method (*T) Setenv(string, string) -pkg text/template/parse, const SkipFuncCheck = 2 -pkg text/template/parse, const SkipFuncCheck Mode -pkg time, func UnixMicro(int64) Time -pkg time, func UnixMilli(int64) Time -pkg time, method (*Time) IsDST() bool -pkg time, method (Time) UnixMicro() int64 -pkg time, method (Time) UnixMilli() int64 diff --git a/codereview.cfg b/codereview.cfg index 4157a7260b..b63014898f 100644 --- a/codereview.cfg +++ b/codereview.cfg @@ -1,2 +1 @@ -branch: dev.boringcrypto -parent-branch: master +branch: dev.boringcrypto.go1.17 diff --git a/doc/asm.html b/doc/asm.html index 7173d9bd51..d578800086 100644 --- a/doc/asm.html +++ b/doc/asm.html @@ -827,10 +827,6 @@ The other codes are -> (arithmetic right shift),

ARM64

-

-The ARM64 port is in an experimental state. -

-

R18 is the "platform register", reserved on the Apple platform. To prevent accidental misuse, the register is named R18_PLATFORM. diff --git a/doc/go1.17.html b/doc/go1.17.html index cf856a1e73..48811e6b67 100644 --- a/doc/go1.17.html +++ b/doc/go1.17.html @@ -25,12 +25,54 @@ Do not send CLs removing the interior tags from such phrases.

Changes to the language

-

- TODO: https://golang.org/cl/216424: allow conversion from slice to array ptr +

+ Go 1.17 includes three small enhancements to the language.

-

- TODO: https://golang.org/cl/312212: add unsafe.Add and unsafe.Slice +

    +
  • + Conversions + from slice to array pointer: An expression s of + type []T may now be converted to array pointer type + *[N]T. If a is the result of such a + conversion, then corresponding indices that are in range refer to + the same underlying elements: &a[i] == &s[i] + for 0 <= i < N. The conversion panics if + len(s) is less than N. +
    • + +
  • + unsafe.Add: + unsafe.Add(ptr, len) adds len + to ptr and returns the updated pointer + unsafe.Pointer(uintptr(ptr) + uintptr(len)). +
    • + +
  • + unsafe.Slice: + For expression ptr of type *T, + unsafe.Slice(ptr, len) returns a slice of + type []T whose underlying array starts + at ptr and whose length and capacity + are len. +
    • +
+ +

+ The package unsafe enhancements were added to simplify writing code that conforms + to unsafe.Pointer's safety + rules, but the rules remain unchanged. In particular, existing + programs that correctly use unsafe.Pointer remain + valid, and new programs must still follow the rules when + using unsafe.Add or unsafe.Slice. +

+ + +

+ Note that the new conversion from slice to array pointer is the + first case in which a type conversion can panic at run time. + Analysis tools that assume type conversions can never panic + should be updated to consider this possibility.

Ports

@@ -43,16 +85,53 @@ Do not send CLs removing the interior tags from such phrases. for previous versions has been discontinued.

-

- TODO: complete the Ports section +

Windows

+ +

+ Go 1.17 adds support of 64-bit ARM architecture on Windows (the + windows/arm64 port). This port supports cgo. +

+ +

OpenBSD

+ +

+ The 64-bit MIPS architecture on OpenBSD (the openbsd/mips64 + port) now supports cgo. +

+ +

+ In Go 1.16, on the 64-bit x86 and 64-bit ARM architectures on + OpenBSD (the openbsd/amd64 and openbsd/arm64 + ports) system calls are made through libc, instead + of directly using machine instructions. In Go 1.17, this is also + done on the 32-bit x86 and 32-bit ARM architectures on OpenBSD + (the openbsd/386 and openbsd/arm ports). + This ensures compatibility with OpenBSD 6.9 onwards, which require + system calls to be made through libc for non-static + Go binaries. +

+ +

ARM64

+ +

+ Go programs now maintain stack frame pointers on the 64-bit ARM + architecture on all operating systems. Previously it maintained + stack frame pointers only on Linux, macOS, and iOS. +

+ +

loong64 GOARCH value reserved

+ +

+ The main Go compiler does not yet support the LoongArch + architecture, but we've reserved the GOARCH value + "loong64". + This means that Go files named *_loong64.go will now + be ignored by Go + tools except when that GOARCH value is being used.

Tools

-

- TODO: complete the Tools section -

-

Go command

Lazy module loading

@@ -60,7 +139,7 @@ Do not send CLs removing the interior tags from such phrases.

If a module specifies go 1.17 or higher in its go.mod file, its transitive requirements are now loaded lazily, - avoding the need to download or read go.mod files for + avoiding the need to download or read go.mod files for otherwise-irrelevant dependencies. To support lazy loading, in Go 1.17 modules the go command maintains explicit requirements in the go.mod file for every dependency that provides any package @@ -70,8 +149,17 @@ Do not send CLs removing the interior tags from such phrases.

-

To facilitate the upgrade to lazy loading, - the go mod tidy subcommand now supports +

+ Because the number of additional explicit requirements in the go.mod file may + be substantial, in a Go 1.17 module the newly-added requirements + on indirect dependencies are maintained in a + separate require block from the block containing direct + dependencies. +

+ +

+ To facilitate the upgrade to lazy loading, the + go mod tidy subcommand now supports a -go flag to set or change the go version in the go.mod file. To enable lazy loading for an existing module without changing the selected versions of its dependencies, run: @@ -81,6 +169,42 @@ Do not send CLs removing the interior tags from such phrases. go mod tidy -go=1.17 +

+ By default, go mod tidy verifies that + the selected versions of dependencies relevant to the main module are the same + versions that would be used by the prior Go release (Go 1.16 for a module that + specifies go 1.17), and preserves + the go.sum entries needed by that release even for dependencies + that are not normally needed by other commands. +

+ +

+ The -compat flag allows that version to be overridden to support + older (or only newer) versions, up to the version specified by + the go directive in the go.mod file. To tidy + a go 1.17 module for Go 1.17 only, without saving + checksums for (or checking for consistency with) Go 1.16: +

+ +
+  go mod tidy -compat=1.17
+
+ +

+ Note that even if the main module is tidied with -compat=1.17, + users who require the module from a + go 1.16 or earlier module will still be able to + use it, provided that the packages use only compatible language and library + features. +

+ +

+ The go mod graph subcommand also + supports the -go flag, which causes it to report the graph as + seen by the indicated Go version, showing dependencies that may otherwise be + pruned out by lazy loading. +

+

Module deprecation comments

@@ -108,6 +232,16 @@ Do not send CLs removing the interior tags from such phrases. environment for details.

+

+ go get prints a deprecation warning when installing + commands outside the main module (without the -d flag). + go install cmd@version should be used + instead to install a command at a specific version, using a suffix like + @latest or @v1.2.3. In Go 1.18, the -d + flag will always be enabled, and go get will only + be used to change dependencies in go.mod. +

+

go.mod files missing go directives

@@ -161,72 +295,181 @@ Do not send CLs removing the interior tags from such phrases. password-protected SSH keys.

-

- TODO: https://golang.org/cl/249759: cmd/cover: replace code using optimized golang.org/x/tools/cover +

go mod download

+ +

+ When go mod download is invoked without + arguments, it will no longer save sums for downloaded module content to + go.sum. It may still make changes to go.mod and + go.sum needed to load the build list. This is the same as the + behavior in Go 1.15. To save sums for all modules, use go + mod download all. +

+ +

//go:build lines

+ +

+ The go command now understands //go:build lines + and prefers them over // +build lines. The new syntax uses + boolean expressions, just like Go, and should be less error-prone. + As of this release, the new syntax is fully supported, and all Go files + should be updated to have both forms with the same meaning. To aid in + migration, gofmt now automatically + synchronizes the two forms. For more details on the syntax and migration plan, + see + https://golang.org/design/draft-gobuild. +

+ +

go run

+ +

+ go run now accepts arguments with version suffixes + (for example, go run + example.com/cmd@v1.0.0). This causes go + run to build and run packages in module-aware mode, ignoring the + go.mod file in the current directory or any parent directory, if + there is one. This is useful for running executables without installing them or + without changing dependencies of the current module. +

+ +

Gofmt

+ +

+ gofmt (and go fmt) now synchronizes + //go:build lines with // +build lines. If a file + only has // +build lines, they will be moved to the appropriate + location in the file, and matching //go:build lines will be + added. Otherwise, // +build lines will be overwritten based on + any existing //go:build lines. For more information, see + https://golang.org/design/draft-gobuild.

Vet

+

New warning for mismatched //go:build and // +build lines

+ +

+ The vet tool now verifies that //go:build and + // +build lines are in the correct part of the file and + synchronized with each other. If they aren't, + gofmt can be used to fix them. For more + information, see + https://golang.org/design/draft-gobuild. +

+ +

New warning for calling signal.Notify on unbuffered channels

+

- TODO: https://golang.org/cl/299532: cmd/vet: bring in sigchanyzer to report unbuffered channels to signal.Notify + The vet tool now warns about calls to signal.Notify + with incoming signals being sent to an unbuffered channel. Using an unbuffered channel + risks missing signals sent on them as signal.Notify does not block when + sending to a channel. For example:

+
+c := make(chan os.Signal)
+// signals are sent on c before the channel is read from.
+// This signal may be dropped as c is unbuffered.
+signal.Notify(c, os.Interrupt)
+
+

- TODO: complete the Vet section + Users of signal.Notify should use channels with sufficient buffer space to keep up with the + expected signal rate.

-

Runtime

+

New warnings for Is, As and Unwrap methods

-

- TODO: https://golang.org/cl/304470: cmd/compile, runtime: add metadata for argument printing in traceback +

+ The vet tool now warns about methods named As, Is or Unwrap + on types implementing the error interface that have a different signature than the + one expected by the errors package. The errors.{As,Is,Unwrap} functions + expect such methods to implement either Is(error) bool, + As(interface{}) bool, or Unwrap() error + respectively. The functions errors.{As,Is,Unwrap} will ignore methods with the same + names but a different signature. For example:

-

- TODO: complete the Runtime section +

+type MyError struct { hint string }
+func (m MyError) Error() string { ... } // MyError implements error.
+func (MyError) Is(target interface{}) bool { ... } // target is interface{} instead of error.
+func Foo() bool {
+	x, y := MyError{"A"}, MyError{"B"}
+	return errors.Is(x, y) // returns false as x != y and MyError does not have an `Is(error) bool` function.
+}
+
+ +

Cover

+ +

+ The cover tool now uses an optimized parser + from golang.org/x/tools/cover, which may be noticeably faster + when parsing large coverage profiles.

Compiler

-

- TODO: complete the Compiler section, or delete if not needed +

+ Go 1.17 implements a new way of passing function arguments and results using + registers instead of the stack. + Benchmarks for a representative set of Go packages and programs show + performance improvements of about 5%, and a typical reduction in + binary size of about 2%. + This is currently enabled for Linux, macOS, and Windows on the + 64-bit x86 architecture (the linux/amd64, + darwin/amd64, and windows/amd64 ports).

-

Linker

-

- TODO: complete the Linker section, or delete if not needed + This change does not affect the functionality of any safe Go code + and is designed to have no impact on most assembly code. + It may affect code that violates + the unsafe.Pointer + rules when accessing function arguments, or that depends on + undocumented behavior involving comparing function code pointers. + To maintain compatibility with existing assembly functions, the + compiler generates adapter functions that convert between the new + register-based calling convention and the previous stack-based + calling convention. + These adapters are typically invisible to users, except that taking + the address of a Go function in assembly code or taking the address + of an assembly function in Go code + using reflect.ValueOf(fn).Pointer() + or unsafe.Pointer will now return the address of the + adapter. + Code that depends on the value of these code pointers may no longer + behave as expected. + Adapters also may cause a very small performance overhead in two + cases: calling an assembly function indirectly from Go via + a func value, and calling Go functions from assembly. +

+ +

+ The format of stack traces from the runtime (printed when an uncaught panic + occurs, or when runtime.Stack is called) is improved. Previously, + the function arguments were printed as hexadecimal words based on the memory + layout. Now each argument in the source code is printed separately, separated + by commas. Aggregate-typed (struct, array, string, slice, interface, and complex) + arguments are delimited by curly braces. A caveat is that the value of an + argument that only lives in a register and is not stored to memory may be + inaccurate. Function return values (which were usually inaccurate) are no longer + printed. +

+ +

+ Functions containing closures can now be inlined. + One effect of this change is that a function with a closure may + produce a distinct closure code pointer for each place that the + function is inlined. + Go function values are not directly comparable, but this change + could reveal bugs in code that uses reflect + or unsafe.Pointer to bypass this language restriction + and compare functions by code pointer.

Core library

-

- TODO: complete the Core library section -

- -

crypto/tls

- -

- (*Conn).HandshakeContext was added to - allow the user to control cancellation of an in-progress TLS Handshake. - The context provided is propagated into the - ClientHelloInfo - and CertificateRequestInfo - structs and accessible through the new - (*ClientHelloInfo).Context - and - - (*CertificateRequestInfo).Context - methods respectively. Canceling the context after the handshake has finished - has no effect. -

- -

- When Config.NextProtos is set, servers now - enforce that there is an overlap between the configured protocols and the protocols - advertised by the client, if any. If there is no overlap the connection is closed - with the no_application_protocol alert, as required by RFC 7301. -

-

Cgo

@@ -236,6 +479,67 @@ Do not send CLs removing the interior tags from such phrases. runtime/cgo.Handle for more information.

+

URL query parsing

+ + +

+ The net/url and net/http packages used to accept + ";" (semicolon) as a setting separator in URL queries, in + addition to "&" (ampersand). Now, settings with non-percent-encoded + semicolons are rejected and net/http servers will log a warning to + Server.ErrorLog + when encountering one in a request URL. +

+ +

+ For example, before Go 1.17 the Query + method of the URL example?a=1;b=2&c=3 would have returned + map[a:[1] b:[2] c:[3]], while now it returns map[c:[3]]. +

+ +

+ When encountering such a query string, + URL.Query + and + Request.FormValue + ignore any settings that contain a semicolon, + ParseQuery + returns the remaining settings and an error, and + Request.ParseForm + and + Request.ParseMultipartForm + return an error but still set Request fields based on the + remaining settings. +

+ +

+ net/http users can restore the original behavior by using the new + AllowQuerySemicolons + handler wrapper. This will also suppress the ErrorLog warning. + Note that accepting semicolons as query separators can lead to security issues + if different systems interpret cache keys differently. + See issue 25192 for more information. +

+ +

TLS strict ALPN

+ + +

+ When Config.NextProtos + is set, servers now enforce that there is an overlap between the configured + protocols and the ALPN protocols advertised by the client, if any. If there is + no mutually supported protocol, the connection is closed with the + no_application_protocol alert, as required by RFC 7301. This + helps mitigate the ALPACA cross-protocol attack. +

+ +

+ As an exception, when the value "h2" is included in the server's + Config.NextProtos, HTTP/1.1 clients will be allowed to connect as + if they didn't support ALPN. + See issue 46310 for more information. +

+

Minor changes to the library

@@ -247,7 +551,7 @@ Do not send CLs removing the interior tags from such phrases.

archive/zip

- TODO: https://golang.org/cl/312310: add File.OpenRaw, Writer.CreateRaw, Writer.Copy + The new methods File.OpenRaw, Writer.CreateRaw, Writer.Copy provide support for cases where performance is a primary concern.

@@ -275,35 +579,170 @@ Do not send CLs removing the interior tags from such phrases.
compress/lzw

- The new - Reader.Reset - and - Writer.Reset - methods allow reuse of a Reader or Writer. + The NewReader + function is guaranteed to return a value of the new + type Reader, + and similarly NewWriter + is guaranteed to return a value of the new + type Writer. + These new types both implement a Reset method + (Reader.Reset, + Writer.Reset) + that allows reuse of the Reader or Writer.

-
crypto/rsa
+
crypto/ed25519
-

- TODO: https://golang.org/cl/302230: fix salt length calculation with PSSSaltLengthAuto +

+ The crypto/ed25519 package has been rewritten, and all + operations are now approximately twice as fast on amd64 and arm64. + The observable behavior has not otherwise changed.

-
+
+ +
crypto/elliptic
+
+

+ CurveParams + methods now automatically invoke faster and safer dedicated + implementations for known curves (P-224, P-256, and P-521) when + available. Note that this is a best-effort approach and applications + should avoid using the generic, not constant-time CurveParams + methods and instead use dedicated + Curve implementations + such as P256. +

+ +

+ The P521 curve + implementation has been rewritten using code generated by the + fiat-crypto project, + which is based on a formally-verified model of the arithmetic + operations. It is now constant-time and three times faster on amd64 and + arm64. The observable behavior has not otherwise changed. +

+
+
+ +
crypto/rand
+
+

+ The crypto/rand package now uses the getentropy + syscall on macOS and the getrandom syscall on Solaris, + Illumos, and DragonFlyBSD. +

+
+
+ +
crypto/tls
+
+

+ The new Conn.HandshakeContext + method allows the user to control cancellation of an in-progress TLS + handshake. The provided context is accessible from various callbacks through the new + ClientHelloInfo.Context and + CertificateRequestInfo.Context + methods. Canceling the context after the handshake has finished has no effect. +

+ +

+ Cipher suite ordering is now handled entirely by the + crypto/tls package. Currently, cipher suites are sorted based + on their security, performance, and hardware support taking into account + both the local and peer's hardware. The order of the + Config.CipherSuites + field is now ignored, as well as the + Config.PreferServerCipherSuites + field. Note that Config.CipherSuites still allows + applications to choose what TLS 1.0–1.2 cipher suites to enable. +

+ +

+ The 3DES cipher suites have been moved to + InsecureCipherSuites + due to fundamental block size-related + weakness. They are still enabled by default but only as a last resort, + thanks to the cipher suite ordering change above. +

+ +

+ Beginning in the next release, Go 1.18, the + Config.MinVersion + for crypto/tls clients will default to TLS 1.2, disabling TLS 1.0 + and TLS 1.1 by default. Applications will be able to override the change by + explicitly setting Config.MinVersion. + This will not affect crypto/tls servers. +

+
+
+ +
crypto/x509
+
+

+ CreateCertificate + now returns an error if the provided private key doesn't match the + parent's public key, if any. The resulting certificate would have failed + to verify. +

+ +

+ The temporary GODEBUG=x509ignoreCN=0 flag has been removed. +

+ +

+ ParseCertificate + has been rewritten, and now consumes ~70% fewer resources. The observable + behavior has not otherwise changed, except for error messages. +

+ +

+ On BSD systems, /etc/ssl/certs is now searched for trusted + roots. This adds support for the new system trusted certificate store in + FreeBSD 12.2+. +

+ +

+ Beginning in the next release, Go 1.18, crypto/x509 will + reject certificates signed with the SHA-1 hash function. This doesn't + apply to self-signed root certificates. Practical attacks against SHA-1 + have been demonstrated in 2017 and publicly + trusted Certificate Authorities have not issued SHA-1 certificates since 2015. +

+
+
database/sql

- TODO: https://golang.org/cl/258360: close driver.Connector if it implements io.Closer + The DB.Close method now closes + the connector field if the type in this field implements the + io.Closer interface.

- TODO: https://golang.org/cl/311572: add NullInt16 and NullByte + The new + NullInt16 + and + NullByte + structs represent the int16 and byte values that may be null. These can be used as + destinations of the Scan method, + similar to NullString.

+
debug/elf
+
+

+ The SHT_MIPS_ABIFLAGS + constant has been added. +

+
+
+
encoding/binary

@@ -315,18 +754,96 @@ Do not send CLs removing the interior tags from such phrases.

+
encoding/csv
+
+

+ The new + Reader.FieldPos + method returns the line and column corresponding to the start of + a given field in the record most recently returned by + Read. +

+
+
+ +
encoding/xml
+
+

+ When a comment appears within a + Directive, it is now replaced + with a single space instead of being completely elided. +

+ +

+ Invalid element or attribute names with leading, trailing, or multiple + colons are now stored unmodified into the + Name.Local field. +

+
+
+
flag

- TODO: https://golang.org/cl/271788: panic if flag name begins with - or contains = + Flag declarations now panic if an invalid name is specified.

+
go/build
+
+

+ The new + Context.ToolTags + field holds the build tags appropriate to the current Go + toolchain configuration. +

+
+
+ +
go/format
+
+

+ The Source and + Node functions now + synchronize //go:build lines with // +build + lines. If a file only has // +build lines, they will be + moved to the appropriate location in the file, and matching + //go:build lines will be added. Otherwise, + // +build lines will be overwritten based on any existing + //go:build lines. For more information, see + https://golang.org/design/draft-gobuild. +

+
+
+ +
go/parser
+
+

+ The new SkipObjectResolution + Mode value instructs the parser not to resolve identifiers to + their declaration. This may improve parsing speed. +

+
+
+ +
image
+
+

+ The concrete image types (RGBA, Gray16 and so on) + now implement a new RGBA64Image + interface. The concrete types that previously implemented + draw.Image now also implement + draw.RGBA64Image, a + new interface in the image/draw package. +

+
+
+
io/fs

- TODO: https://golang.org/cl/293649: implement FileInfoToDirEntry + The new FileInfoToDirEntry function converts a FileInfo to a DirEntry.

@@ -334,7 +851,9 @@ Do not send CLs removing the interior tags from such phrases.
math

- TODO: https://golang.org/cl/247058: add MaxUint, MinInt, MaxInt + The math package now defines three more constants: MaxUint, MaxInt and MinInt. + For 32-bit systems their values are 2^32 - 1, 2^31 - 1 and -2^31, respectively. + For 64-bit systems their values are 2^64 - 1, 2^63 - 1 and -2^63, respectively.

@@ -342,23 +861,54 @@ Do not send CLs removing the interior tags from such phrases.
mime

- TODO: https://golang.org/cl/305230: support reading shared mime-info database on unix systems + On Unix systems, the table of MIME types is now read from the local system's + Shared MIME-info Database + when available.

+
mime/multipart
+
+

+ Part.FileName + now applies + filepath.Base to the + return value. This mitigates potential path traversal vulnerabilities in + applications that accept multipart messages, such as net/http + servers that call + Request.FormFile. +

+
+
+
net

- TODO: https://golang.org/cl/272668: add IP.IsPrivate + The new method IP.IsPrivate reports whether an address is + a private IPv4 address according to RFC 1918 + or a local IPv6 address according RFC 4193.

- TODO: https://golang.org/cl/301709: make go resolver aware of network parameter + The Go DNS resolver now only sends one DNS query when resolving an address for an IPv4-only or IPv6-only network, + rather than querying for both address families.

- TODO: https://golang.org/cl/307030: make ErrClosed and ParseError implement net.Error + The ErrClosed sentinel error and + ParseError error type now implement + the net.Error interface. +

+ +

+ The ParseIP and ParseCIDR + functions now reject IPv4 addresses which contain decimal components with leading zeros. + + These components were always interpreted as decimal, but some operating systems treat them as octal. + This mismatch could hypothetically lead to security issues if a Go application was used to validate IP addresses + which were then used in their original form with non-Go applications which interpreted components as octal. Generally, + it is advisable to always re-encode values after validation, which avoids this class of parser misalignment issues.

@@ -373,11 +923,37 @@ Do not send CLs removing the interior tags from such phrases.

- TODO: https://golang.org/cl/235437: add to deadlines only when positive + Setting the Server + ReadTimeout or WriteTimeout fields to a negative value now indicates no timeout + rather than an immediate timeout.

- TODO: https://golang.org/cl/308952: make ReadRequest return an error when requests have multiple Host headers + The ReadRequest function + now returns an error when the request has multiple Host headers. +

+ +

+ When producing a redirect to the cleaned version of a URL, + ServeMux now always + uses relative URLs in the Location header. Previously it + would echo the full URL of the request, which could lead to unintended + redirects if the client could be made to send an absolute request URL. +

+ +

+ When interpreting certain HTTP headers handled by net/http, + non-ASCII characters are now ignored or rejected. +

+ +

+ If + Request.ParseForm + returns an error when called by + Request.ParseMultipartForm, + the latter now continues populating + Request.MultipartForm + before returning it.

@@ -385,7 +961,10 @@ Do not send CLs removing the interior tags from such phrases.
net/http/httptest

- TODO: https://golang.org/cl/308950: panic on non-3 digit (XXX) status code in Recorder.WriteHeader + ResponseRecorder.WriteHeader + now panics when the provided code is not a valid three-digit HTTP status code. + This matches the behavior of ResponseWriter + implementations in the net/http package.

@@ -393,7 +972,8 @@ Do not send CLs removing the interior tags from such phrases.
net/url

- TODO: https://golang.org/cl/314850: add Values.Has + The new method Values.Has + reports whether a query parameter is set.

@@ -401,13 +981,26 @@ Do not send CLs removing the interior tags from such phrases.
os

- TODO: https://golang.org/cl/268020: avoid allocation in File.WriteString + The File.WriteString method + has been optimized to not make a copy of the input string.

reflect
+

+ The new + Value.CanConvert + method reports whether a value can be converted to a type. + This may be used to avoid a panic when converting a slice to an + array pointer type if the slice is too short. + Previously it was sufficient to use + Type.ConvertibleTo + for this, but the newly permitted conversion from slice to array + pointer type can panic even if the types are convertible. +

+

The new StructField.IsExported @@ -419,23 +1012,49 @@ Do not send CLs removing the interior tags from such phrases.

- TODO: https://golang.org/cl/281233: add VisibleFields function + The new VisibleFields function + returns all the visible fields in a struct type, including fields inside anonymous struct members.

- TODO: https://golang.org/cl/284136: panic if ArrayOf is called with negative length + The ArrayOf function now panics when + called with a negative length. +

+ +

+ Checking the Type.ConvertibleTo method + is no longer sufficient to guarantee that a call to + Value.Convert will not panic. + It may panic when converting `[]T` to `*[N]T` if the slice's length is less than N. + See the language changes section above.

+
runtime/metrics
+
+

+ New metrics were added that track total bytes and objects allocated and freed. + A new metric tracking the distribution of goroutine scheduling latencies was + also added. +

+
+
+ +
runtime/pprof
+
+

+ Block profiles are no longer biased to favor infrequent long events over + frequent short events. +

+
+
+
strconv
-

- TODO: https://golang.org/cl/170079: implement Ryū-like algorithm for fixed precision ftoa -

- -

- TODO: https://golang.org/cl/170080: Implement Ryū algorithm for ftoa shortest mode +

+ The strconv package now uses Ulf Adams's Ryū algorithm for formatting floating-point numbers. + This algorithm improves performance on most inputs and is more than 99% faster on worst-case inputs.

@@ -460,7 +1079,9 @@ Do not send CLs removing the interior tags from such phrases.

sync/atomic

- TODO: https://golang.org/cl/241678: add (*Value).Swap and (*Value).CompareAndSwap + atomic.Value now has Swap and + CompareAndSwap methods that provide + additional atomic operations.

@@ -468,11 +1089,38 @@ Do not send CLs removing the interior tags from such phrases.
syscall

- TODO: https://golang.org/cl/295371: do not overflow key memory in GetQueuedCompletionStatus +

+ The GetQueuedCompletionStatus and + PostQueuedCompletionStatus + functions are now deprecated. These functions have incorrect signatures and are superseded by + equivalents in the golang.org/x/sys/windows package.

- TODO: https://golang.org/cl/313653: restore signal mask after setting foreground process group + On Unix-like systems, the process group of a child process is now set with signals blocked. + This avoids sending a SIGTTOU to the child when the parent is in a background process group. +

+ +

+ The Windows version of + SysProcAttr + has two new fields. AdditionalInheritedHandles is + a list of additional handles to be inherited by the new child + process. ParentProcess permits specifying the + parent process of the new process. + +

+ The constant MSG_CMSG_CLOEXEC is now defined on + DragonFly and all OpenBSD systems (it was already defined on + some OpenBSD systems and all FreeBSD, NetBSD, and Linux systems). +

+ +

+ The constants SYS_WAIT6 and WEXITED + are now defined on NetBSD systems (SYS_WAIT6 was + already defined on DragonFly and FreeBSD systems; + WEXITED was already defined on Darwin, DragonFly, + FreeBSD, Linux, and Solaris systems).

@@ -480,7 +1128,14 @@ Do not send CLs removing the interior tags from such phrases.
testing

- TODO: https://golang.org/cl/310033: add -shuffle=off|on|N to alter the execution order of tests and benchmarks + Added a new testing flag -shuffle which controls the execution order of tests and benchmarks. +

+

+ The new + T.Setenv + and B.Setenv + methods support setting an environment variable for the duration + of the test or benchmark.

@@ -488,7 +1143,8 @@ Do not send CLs removing the interior tags from such phrases.
text/template/parse

- TODO: https://golang.org/cl/301493: add a mode to skip func-check on parsing + The new SkipFuncCheck Mode + value changes the template parser to not verify that functions are defined.

@@ -496,21 +1152,41 @@ Do not send CLs removing the interior tags from such phrases.
time

- time.Time now has a GoString - method that will return a more useful value for times when printed with - the "%#v" format specifier in the fmt package. + The Time type now has a + GoString method that + will return a more useful value for times when printed with the + %#v format specifier in the fmt package.

- TODO: https://golang.org/cl/264077: add Time.IsDST() to check if its Location is in Daylight Savings Time + The new Time.IsDST method can be used to check whether the time + is in Daylight Savings Time in its configured location.

- TODO: https://golang.org/cl/293349: add Time.Unix{Milli,Micro} and to-Time helpers UnixMicro, UnixMilli + The new Time.UnixMilli and + Time.UnixMicro + methods return the number of milliseconds and microseconds elapsed since + January 1, 1970 UTC respectively. +
+ The new UnixMilli and + UnixMicro functions + return the local Time corresponding to the given Unix time.

- TODO: https://golang.org/cl/300996: support "," as separator for fractional seconds + The package now accepts comma "," as a separator for fractional seconds when parsing and formatting time. + The following time formats are now accepted: +

    +
  • 2006-01-02 14:06:03,999999999 -0700 MST
    • +
  • Mon Jan _2 14:06:03,120007 2006
    • +
  • Mon Jan 2 14:06:03,120007 2006
    • +
+

+ +

+ The new constant Layout + defines the reference time.

diff --git a/doc/go_spec.html b/doc/go_spec.html index e59b3554f2..0e14a1f3b6 100644 --- a/doc/go_spec.html +++ b/doc/go_spec.html @@ -1,6 +1,6 @@ @@ -490,8 +490,8 @@ After a backslash, certain single-character escapes represent special values: \n U+000A line feed or newline \r U+000D carriage return \t U+0009 horizontal tab -\v U+000b vertical tab -\\ U+005c backslash +\v U+000B vertical tab +\\ U+005C backslash \' U+0027 single quote (valid escape only within rune literals) \" U+0022 double quote (valid escape only within string literals) @@ -4334,7 +4334,10 @@ s4 := (*[4]byte)(s) // panics: len([4]byte) > len(s) var t []string t0 := (*[0]string)(t) // t0 == nil -t1 := (*[1]string)(t) // panics: len([1]string) > len(s) +t1 := (*[1]string)(t) // panics: len([1]string) > len(t) + +u := make([]byte, 0) +u0 = (*[0]byte)(u) // u0 != nil

Constant expressions

@@ -4670,7 +4673,7 @@ The following built-in functions are not permitted in statement context: 
 append cap complex imag len make new real
-unsafe.Alignof unsafe.Offsetof unsafe.Sizeof
+unsafe.Add unsafe.Alignof unsafe.Offsetof unsafe.Sizeof unsafe.Slice
 
@@ -4909,7 +4912,7 @@ if x := f(); x < y {
 
 

 "Switch" statements provide multi-way execution.
-An expression or type specifier is compared to the "cases"
+An expression or type is compared to the "cases"
 inside the "switch" to determine which branch
 to execute.
 

@@ -5020,7 +5023,7 @@ floating point, or string constants in case expressions.
 A type switch compares types rather than values. It is otherwise similar
 to an expression switch. It is marked by a special switch expression that
 has the form of a type assertion
-using the reserved word type rather than an actual type:
+using the keyword type rather than an actual type:
 

 
 
@@ -6782,18 +6785,26 @@ The rules for valid uses of Pointer
 The function Slice returns a slice whose underlying array starts at ptr
-and whose length and capacity are len:
+and whose length and capacity are len.
+Slice(ptr, len) is equivalent to
 

 
 
 (*[len]ArbitraryType)(unsafe.Pointer(ptr))[:]
 

 
+

+except that, as a special case, if ptr
+is nil and len is zero,
+Slice returns nil.
+

+
 

 The len argument must be of integer type or an untyped constant.
 A constant len argument must be non-negative and representable by a value of type int;
 if it is an untyped constant it is given type int.
-If ptr is nil or len is negative at run time,
+At run time, if len is negative,
+or if ptr is nil and len is not zero,
 a run-time panic occurs.
 

 
diff --git a/misc/cgo/errors/errors_test.go b/misc/cgo/errors/errors_test.go
index a077b59478..68a30a44fe 100644
--- a/misc/cgo/errors/errors_test.go
+++ b/misc/cgo/errors/errors_test.go
@@ -40,7 +40,8 @@ func check(t *testing.T, file string) {
 			if len(frags) == 1 {
 				continue
 			}
-			re, err := regexp.Compile(string(frags[1]))
+			frag := fmt.Sprintf(":%d:.*%s", i+1, frags[1])
+			re, err := regexp.Compile(frag)
 			if err != nil {
 				t.Errorf("Invalid regexp after `ERROR HERE: `: %#q", frags[1])
 				continue
diff --git a/misc/cgo/errors/testdata/err2.go b/misc/cgo/errors/testdata/err2.go
index 1d22401aee..a90598fe35 100644
--- a/misc/cgo/errors/testdata/err2.go
+++ b/misc/cgo/errors/testdata/err2.go
@@ -40,15 +40,15 @@ func main() {
 	C.foop = x // ERROR HERE
 
 	// issue 13129: used to output error about C.unsignedshort with CC=clang
-	var x C.ushort
-	x = int(0) // ERROR HERE: C\.ushort
+	var x1 C.ushort
+	x1 = int(0) // ERROR HERE: C\.ushort
 
 	// issue 13423
 	_ = C.fopen() // ERROR HERE
 
 	// issue 13467
-	var x rune = '✈'
-	var _ rune = C.transform(x) // ERROR HERE: C\.int
+	var x2 rune = '✈'
+	var _ rune = C.transform(x2) // ERROR HERE: C\.int
 
 	// issue 13635: used to output error about C.unsignedchar.
 	// This test tests all such types.
@@ -91,10 +91,10 @@ func main() {
 
 	// issue 26745
 	_ = func(i int) int {
-		return C.i + 1 // ERROR HERE: :13
+		return C.i + 1 // ERROR HERE: 14
 	}
 	_ = func(i int) {
-		C.fi(i) // ERROR HERE: :6
+		C.fi(i) // ERROR HERE: 7
 	}
 
 	C.fi = C.fi // ERROR HERE
diff --git a/misc/cgo/test/issue1435.go b/misc/cgo/test/issue1435.go
index cf34ce8db6..92c6b99846 100644
--- a/misc/cgo/test/issue1435.go
+++ b/misc/cgo/test/issue1435.go
@@ -9,6 +9,7 @@ package cgotest
 import (
 	"fmt"
 	"os"
+	"sort"
 	"strings"
 	"syscall"
 	"testing"
@@ -105,11 +106,23 @@ func compareStatus(filter, expect string) error {
 				// "Pid:\t".
 			}
 			if strings.HasPrefix(line, filter) {
-				if line != expected {
-					return fmt.Errorf("%q got:%q want:%q (bad) [pid=%d file:'%s' %v]\n", tf, line, expected, pid, string(d), expectedProc)
+				if line == expected {
+					foundAThread = true
+					break
 				}
-				foundAThread = true
-				break
+				if filter == "Groups:" && strings.HasPrefix(line, "Groups:\t") {
+					// https://github.com/golang/go/issues/46145
+					// Containers don't reliably output this line in sorted order so manually sort and compare that.
+					a := strings.Split(line[8:], " ")
+					sort.Strings(a)
+					got := strings.Join(a, " ")
+					if got == expected[8:] {
+						foundAThread = true
+						break
+					}
+
+				}
+				return fmt.Errorf("%q got:%q want:%q (bad) [pid=%d file:'%s' %v]\n", tf, line, expected, pid, string(d), expectedProc)
 			}
 		}
 	}
diff --git a/misc/cgo/testcshared/cshared_test.go b/misc/cgo/testcshared/cshared_test.go
index 90d8c365e6..19ad8c76a8 100644
--- a/misc/cgo/testcshared/cshared_test.go
+++ b/misc/cgo/testcshared/cshared_test.go
@@ -292,11 +292,60 @@ func createHeaders() error {
 		"-installsuffix", "testcshared",
 		"-o", libgoname,
 		filepath.Join(".", "libgo", "libgo.go")}
+	if GOOS == "windows" && strings.HasSuffix(args[6], ".a") {
+		args[6] = strings.TrimSuffix(args[6], ".a") + ".dll"
+	}
 	cmd = exec.Command(args[0], args[1:]...)
 	out, err = cmd.CombinedOutput()
 	if err != nil {
 		return fmt.Errorf("command failed: %v\n%v\n%s\n", args, err, out)
 	}
+	if GOOS == "windows" {
+		// We can't simply pass -Wl,--out-implib, because this relies on having imports from multiple packages,
+		// which results in the linkers output implib getting overwritten at each step. So instead build the
+		// import library the traditional way, using a def file.
+		err = os.WriteFile("libgo.def",
+			[]byte("LIBRARY libgo.dll\nEXPORTS\n\tDidInitRun\n\tDidMainRun\n\tDivu\n\tFromPkg\n\t_cgo_dummy_export\n"),
+			0644)
+		if err != nil {
+			return fmt.Errorf("unable to write def file: %v", err)
+		}
+		out, err = exec.Command(cc[0], append(cc[1:], "-print-prog-name=dlltool")...).CombinedOutput()
+		if err != nil {
+			return fmt.Errorf("unable to find dlltool path: %v\n%s\n", err, out)
+		}
+		args := []string{strings.TrimSpace(string(out)), "-D", args[6], "-l", libgoname, "-d", "libgo.def"}
+
+		// This is an unfortunate workaround for https://github.com/mstorsjo/llvm-mingw/issues/205 in which
+		// we basically reimplement the contents of the dlltool.sh wrapper: https://git.io/JZFlU
+		dlltoolContents, err := os.ReadFile(args[0])
+		if err != nil {
+			return fmt.Errorf("unable to read dlltool: %v\n", err)
+		}
+		if bytes.HasPrefix(dlltoolContents, []byte("#!/bin/sh")) && bytes.Contains(dlltoolContents, []byte("llvm-dlltool")) {
+			base, name := filepath.Split(args[0])
+			args[0] = filepath.Join(base, "llvm-dlltool")
+			var machine string
+			switch strings.SplitN(name, "-", 2)[0] {
+			case "i686":
+				machine = "i386"
+			case "x86_64":
+				machine = "i386:x86-64"
+			case "armv7":
+				machine = "arm"
+			case "aarch64":
+				machine = "arm64"
+			}
+			if len(machine) > 0 {
+				args = append(args, "-m", machine)
+			}
+		}
+
+		out, err = exec.Command(args[0], args[1:]...).CombinedOutput()
+		if err != nil {
+			return fmt.Errorf("unable to run dlltool to create import library: %v\n%s\n", err, out)
+		}
+	}
 
 	if runtime.GOOS != GOOS && GOOS == "android" {
 		args = append(adbCmd(), "push", libgoname, fmt.Sprintf("%s/%s", androiddir, libgoname))
@@ -400,7 +449,7 @@ func main() {
 	defer f.Close()
 	section := f.Section(".edata")
 	if section == nil {
-		t.Fatalf(".edata section is not present")
+		t.Skip(".edata section is not present")
 	}
 
 	// TODO: deduplicate this struct from cmd/link/internal/ld/pe.go
@@ -749,7 +798,12 @@ func TestGo2C2Go(t *testing.T) {
 	defer os.RemoveAll(tmpdir)
 
 	lib := filepath.Join(tmpdir, "libtestgo2c2go."+libSuffix)
-	run(t, nil, "go", "build", "-buildmode=c-shared", "-o", lib, "./go2c2go/go")
+	var env []string
+	if GOOS == "windows" && strings.HasSuffix(lib, ".a") {
+		env = append(env, "CGO_LDFLAGS=-Wl,--out-implib,"+lib, "CGO_LDFLAGS_ALLOW=.*")
+		lib = strings.TrimSuffix(lib, ".a") + ".dll"
+	}
+	run(t, env, "go", "build", "-buildmode=c-shared", "-o", lib, "./go2c2go/go")
 
 	cgoCflags := os.Getenv("CGO_CFLAGS")
 	if cgoCflags != "" {
diff --git a/misc/cgo/testplugin/plugin_test.go b/misc/cgo/testplugin/plugin_test.go
index 28a8c669c0..9697dbf7a7 100644
--- a/misc/cgo/testplugin/plugin_test.go
+++ b/misc/cgo/testplugin/plugin_test.go
@@ -263,6 +263,17 @@ func TestIssue25756(t *testing.T) {
 	}
 }
 
+// Test with main using -buildmode=pie with plugin for issue #43228
+func TestIssue25756pie(t *testing.T) {
+	if os.Getenv("GO_BUILDER_NAME") == "darwin-arm64-11_0-toothrot" {
+		t.Skip("broken on darwin/arm64 builder in sharded mode; see issue 46239")
+	}
+
+	goCmd(t, "build", "-buildmode=plugin", "-o", "life.so", "./issue25756/plugin")
+	goCmd(t, "build", "-buildmode=pie", "-o", "issue25756pie.exe", "./issue25756/main.go")
+	run(t, "./issue25756pie.exe")
+}
+
 func TestMethod(t *testing.T) {
 	// Exported symbol's method must be live.
 	goCmd(t, "build", "-buildmode=plugin", "-o", "plugin.so", "./method/plugin.go")
diff --git a/misc/wasm/wasm_exec.js b/misc/wasm/wasm_exec.js
index 3e41e628ef..231185a123 100644
--- a/misc/wasm/wasm_exec.js
+++ b/misc/wasm/wasm_exec.js
@@ -401,6 +401,7 @@
 							storeValue(sp + 56, result);
 							this.mem.setUint8(sp + 64, 1);
 						} catch (err) {
+							sp = this._inst.exports.getsp() >>> 0; // see comment above
 							storeValue(sp + 56, err);
 							this.mem.setUint8(sp + 64, 0);
 						}
@@ -417,6 +418,7 @@
 							storeValue(sp + 40, result);
 							this.mem.setUint8(sp + 48, 1);
 						} catch (err) {
+							sp = this._inst.exports.getsp() >>> 0; // see comment above
 							storeValue(sp + 40, err);
 							this.mem.setUint8(sp + 48, 0);
 						}
@@ -433,6 +435,7 @@
 							storeValue(sp + 40, result);
 							this.mem.setUint8(sp + 48, 1);
 						} catch (err) {
+							sp = this._inst.exports.getsp() >>> 0; // see comment above
 							storeValue(sp + 40, err);
 							this.mem.setUint8(sp + 48, 0);
 						}
diff --git a/src/archive/zip/reader.go b/src/archive/zip/reader.go
index 808cf274ca..2d53f4c723 100644
--- a/src/archive/zip/reader.go
+++ b/src/archive/zip/reader.go
@@ -96,7 +96,15 @@ func (z *Reader) init(r io.ReaderAt, size int64) error {
 		return err
 	}
 	z.r = r
-	z.File = make([]*File, 0, end.directoryRecords)
+	// Since the number of directory records is not validated, it is not
+	// safe to preallocate z.File without first checking that the specified
+	// number of files is reasonable, since a malformed archive may
+	// indicate it contains up to 1 << 128 - 1 files. Since each file has a
+	// header which will be _at least_ 30 bytes we can safely preallocate
+	// if (data size / 30) >= end.directoryRecords.
+	if (uint64(size)-end.directorySize)/30 >= end.directoryRecords {
+		z.File = make([]*File, 0, end.directoryRecords)
+	}
 	z.Comment = end.comment
 	rs := io.NewSectionReader(r, 0, size)
 	if _, err = rs.Seek(int64(end.directoryOffset), io.SeekStart); err != nil {
diff --git a/src/archive/zip/reader_test.go b/src/archive/zip/reader_test.go
index 35e681ec69..37dafe6c8e 100644
--- a/src/archive/zip/reader_test.go
+++ b/src/archive/zip/reader_test.go
@@ -1325,3 +1325,62 @@ func TestReadDataDescriptor(t *testing.T) {
 		})
 	}
 }
+
+func TestCVE202133196(t *testing.T) {
+	// Archive that indicates it has 1 << 128 -1 files,
+	// this would previously cause a panic due to attempting
+	// to allocate a slice with 1 << 128 -1 elements.
+	data := []byte{
+		0x50, 0x4b, 0x03, 0x04, 0x14, 0x00, 0x08, 0x08,
+		0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+		0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x01, 0x02,
+		0x03, 0x62, 0x61, 0x65, 0x03, 0x04, 0x00, 0x00,
+		0xff, 0xff, 0x50, 0x4b, 0x07, 0x08, 0xbe, 0x20,
+		0x5c, 0x6c, 0x09, 0x00, 0x00, 0x00, 0x03, 0x00,
+		0x00, 0x00, 0x50, 0x4b, 0x01, 0x02, 0x14, 0x00,
+		0x14, 0x00, 0x08, 0x08, 0x08, 0x00, 0x00, 0x00,
+		0x00, 0x00, 0xbe, 0x20, 0x5c, 0x6c, 0x09, 0x00,
+		0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x03, 0x00,
+		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+		0x01, 0x02, 0x03, 0x50, 0x4b, 0x06, 0x06, 0x2c,
+		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x2d,
+		0x00, 0x2d, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+		0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00,
+		0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff,
+		0xff, 0xff, 0xff, 0x31, 0x00, 0x00, 0x00, 0x00,
+		0x00, 0x00, 0x00, 0x3a, 0x00, 0x00, 0x00, 0x00,
+		0x00, 0x00, 0x00, 0x50, 0x4b, 0x06, 0x07, 0x00,
+		0x00, 0x00, 0x00, 0x6b, 0x00, 0x00, 0x00, 0x00,
+		0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x50,
+		0x4b, 0x05, 0x06, 0x00, 0x00, 0x00, 0x00, 0xff,
+		0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+		0xff, 0xff, 0xff, 0x00, 0x00,
+	}
+	_, err := NewReader(bytes.NewReader(data), int64(len(data)))
+	if err != ErrFormat {
+		t.Fatalf("unexpected error, got: %v, want: %v", err, ErrFormat)
+	}
+
+	// Also check that an archive containing a handful of empty
+	// files doesn't cause an issue
+	b := bytes.NewBuffer(nil)
+	w := NewWriter(b)
+	for i := 0; i < 5; i++ {
+		_, err := w.Create("")
+		if err != nil {
+			t.Fatalf("Writer.Create failed: %s", err)
+		}
+	}
+	if err := w.Close(); err != nil {
+		t.Fatalf("Writer.Close failed: %s", err)
+	}
+	r, err := NewReader(bytes.NewReader(b.Bytes()), int64(b.Len()))
+	if err != nil {
+		t.Fatalf("NewReader failed: %s", err)
+	}
+	if len(r.File) != 5 {
+		t.Errorf("Archive has unexpected number of files, got %d, want 5", len(r.File))
+	}
+}
diff --git a/src/cmd/asm/internal/asm/parse.go b/src/cmd/asm/internal/asm/parse.go
index ab48632a44..4cddcf48a4 100644
--- a/src/cmd/asm/internal/asm/parse.go
+++ b/src/cmd/asm/internal/asm/parse.go
@@ -1003,7 +1003,8 @@ func (p *Parser) registerIndirect(a *obj.Addr, prefix rune) {
 				p.errorf("unimplemented two-register form")
 			}
 			a.Index = r1
-			if scale != 0 && p.arch.Family == sys.ARM64 {
+			if scale != 0 && scale != 1 && p.arch.Family == sys.ARM64 {
+				// Support (R1)(R2) (no scaling) and (R1)(R2*1).
 				p.errorf("arm64 doesn't support scaled register format")
 			} else {
 				a.Scale = int16(scale)
diff --git a/src/cmd/asm/internal/asm/testdata/arm64.s b/src/cmd/asm/internal/asm/testdata/arm64.s
index 1146c1a789..d8a20edfc1 100644
--- a/src/cmd/asm/internal/asm/testdata/arm64.s
+++ b/src/cmd/asm/internal/asm/testdata/arm64.s
@@ -89,7 +89,7 @@ TEXT	foo(SB), DUPOK|NOSPLIT, $-8
 	CMP	R1<<33, R2
 	CMP	R22.SXTX, RSP                    // ffe336eb
 	CMP	$0x22220000, RSP                 // CMP $572653568, RSP   // 5b44a4d2ff633beb
-	CMPW	$0x22220000, RSP                 // CMPW $572653568, RSP  // 5b44a452ff633b6b
+	CMPW	$0x22220000, RSP                 // CMPW $572653568, RSP  // 5b44a452ff433b6b
 	CCMN	MI, ZR, R1, $4	                 // e44341ba
 	// MADD Rn,Rm,Ra,Rd
 	MADD	R1, R2, R3, R4                   // 6408019b
@@ -377,6 +377,7 @@ TEXT	foo(SB), DUPOK|NOSPLIT, $-8
 	MOVD	$0x1000100010001000, RSP      // MOVD	$1152939097061330944, RSP   // ff8304b2
 	MOVW	$0x10001000, RSP              // MOVW	$268439552, RSP             // ff830432
 	ADDW	$0x10001000, R1               // ADDW	$268439552, R1              // fb83043221001b0b
+	ADDW	$0x22220000, RSP, R3          // ADDW	$572653568, RSP, R3         // 5b44a452e3433b0b
 
 // move a large constant to a Vd.
 	VMOVS	$0x80402010, V11                                      // VMOVS	$2151686160, V11
@@ -547,6 +548,7 @@ TEXT	foo(SB), DUPOK|NOSPLIT, $-8
 // shifted or extended register offset.
 	MOVD	(R2)(R6.SXTW), R4               // 44c866f8
 	MOVD	(R3)(R6), R5                    // 656866f8
+	MOVD	(R3)(R6*1), R5                  // 656866f8
 	MOVD	(R2)(R6), R4                    // 446866f8
 	MOVWU	(R19)(R20<<2), R20              // 747a74b8
 	MOVD	(R2)(R6<<3), R4                 // 447866f8
@@ -579,6 +581,7 @@ TEXT	foo(SB), DUPOK|NOSPLIT, $-8
 	MOVB	R4, (R2)(R6.SXTX)               // 44e82638
 	MOVB	R8, (R3)(R9.UXTW)               // 68482938
 	MOVB	R10, (R5)(R8)                   // aa682838
+	MOVB	R10, (R5)(R8*1)                 // aa682838
 	MOVH	R11, (R2)(R7.SXTW<<1)           // 4bd82778
 	MOVH	R5, (R1)(R2<<1)                 // 25782278
 	MOVH	R7, (R2)(R5.SXTX<<1)            // 47f82578
diff --git a/src/cmd/asm/internal/asm/testdata/arm64error.s b/src/cmd/asm/internal/asm/testdata/arm64error.s
index 66fc910759..cf57179e43 100644
--- a/src/cmd/asm/internal/asm/testdata/arm64error.s
+++ b/src/cmd/asm/internal/asm/testdata/arm64error.s
@@ -52,6 +52,16 @@ TEXT errors(SB),$0
 	NEGSW	R7@>2, R5                                        // ERROR "unsupported shift operator"
 	CINC	CS, R2, R3, R4                                   // ERROR "illegal combination"
 	CSEL	LT, R1, R2                                       // ERROR "illegal combination"
+	CINC	AL, R2, R3                                       // ERROR "invalid condition"
+	CINC	NV, R2, R3                                       // ERROR "invalid condition"
+	CINVW	AL, R2, R3                                       // ERROR "invalid condition"
+	CINV	NV, R2, R3                                       // ERROR "invalid condition"
+	CNEG	AL, R2, R3                                       // ERROR "invalid condition"
+	CNEGW	NV, R2, R3                                       // ERROR "invalid condition"
+	CSET	AL, R2                                           // ERROR "invalid condition"
+	CSET	NV, R2                                           // ERROR "invalid condition"
+	CSETMW	AL, R2                                           // ERROR "invalid condition"
+	CSETM	NV, R2                                           // ERROR "invalid condition"
 	LDP.P	8(R2), (R2, R3)                                  // ERROR "constrained unpredictable behavior"
 	LDP.W	8(R3), (R2, R3)                                  // ERROR "constrained unpredictable behavior"
 	LDP	(R1), (R2, R2)                                   // ERROR "constrained unpredictable behavior"
diff --git a/src/cmd/asm/internal/asm/testdata/ppc64.s b/src/cmd/asm/internal/asm/testdata/ppc64.s
index 1bd4b1e1c8..b6c0aa5035 100644
--- a/src/cmd/asm/internal/asm/testdata/ppc64.s
+++ b/src/cmd/asm/internal/asm/testdata/ppc64.s
@@ -41,8 +41,8 @@ TEXT asmtest(SB),DUPOK|NOSPLIT,$0
 	MOVDBR (R3)(R4), R5             // 7ca41c28
 	MOVWBR (R3)(R4), R5             // 7ca41c2c
 	MOVHBR (R3)(R4), R5             // 7ca41e2c
-	MOVD $foo+4009806848(FP), R5    // 3fe1ef0138bfcc20
-	MOVD $foo(SB), R5               // 3fe0000038bf0000
+	MOVD $foo+4009806848(FP), R5    // 3ca1ef0138a5cc20
+	MOVD $foo(SB), R5               // 3ca0000038a50000
 
 	MOVDU 8(R3), R4                 // e8830009
 	MOVDU (R3)(R4), R5              // 7ca4186a
diff --git a/src/cmd/cgo/gcc.go b/src/cmd/cgo/gcc.go
index ae61725bc7..a73e998877 100644
--- a/src/cmd/cgo/gcc.go
+++ b/src/cmd/cgo/gcc.go
@@ -1638,6 +1638,8 @@ func (p *Package) gccCmd() []string {
 		c = append(c, "-maix64")
 		c = append(c, "-mcmodel=large")
 	}
+	// disable LTO so we get an object whose symbols we can read
+	c = append(c, "-fno-lto")
 	c = append(c, "-") //read input from standard input
 	return c
 }
diff --git a/src/cmd/cgo/main.go b/src/cmd/cgo/main.go
index 03a662e689..c6a0c525e6 100644
--- a/src/cmd/cgo/main.go
+++ b/src/cmd/cgo/main.go
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// Cgo; see gmp.go for an overview.
+// Cgo; see doc.go for an overview.
 
 // TODO(rsc):
 //	Emit correct line number annotations.
diff --git a/src/cmd/cgo/out.go b/src/cmd/cgo/out.go
index 8c31d5b794..94152f4278 100644
--- a/src/cmd/cgo/out.go
+++ b/src/cmd/cgo/out.go
@@ -168,8 +168,18 @@ func (p *Package) writeDefs() {
 			if *gccgo {
 				fmt.Fprintf(fc, "extern byte *%s;\n", n.C)
 			} else {
-				fmt.Fprintf(fm, "extern char %s[];\n", n.C)
-				fmt.Fprintf(fm, "void *_cgohack_%s = %s;\n\n", n.C, n.C)
+				// Force a reference to all symbols so that
+				// the external linker will add DT_NEEDED
+				// entries as needed on ELF systems.
+				// Treat function variables differently
+				// to avoid type confict errors from LTO
+				// (Link Time Optimization).
+				if n.Kind == "fpvar" {
+					fmt.Fprintf(fm, "extern void %s();\n", n.C)
+				} else {
+					fmt.Fprintf(fm, "extern char %s[];\n", n.C)
+					fmt.Fprintf(fm, "void *_cgohack_%s = %s;\n\n", n.C, n.C)
+				}
 				fmt.Fprintf(fgo2, "//go:linkname __cgo_%s %s\n", n.C, n.C)
 				fmt.Fprintf(fgo2, "//go:cgo_import_static %s\n", n.C)
 				fmt.Fprintf(fgo2, "var __cgo_%s byte\n", n.C)
@@ -1042,7 +1052,7 @@ func (p *Package) writeExports(fgo2, fm, fgcc, fgcch io.Writer) {
 		// This unpacks the argument struct above and calls the Go function.
 		fmt.Fprintf(fgo2, "func _cgoexp%s_%s(a *%s) {\n", cPrefix, exp.ExpName, gotype)
 
-		fmt.Fprintf(fm, "int _cgoexp%s_%s;\n", cPrefix, exp.ExpName)
+		fmt.Fprintf(fm, "void _cgoexp%s_%s(void* p){}\n", cPrefix, exp.ExpName)
 
 		if gccResult != "void" {
 			// Write results back to frame.
diff --git a/src/cmd/compile/abi-internal.md b/src/cmd/compile/abi-internal.md
index f901e707be..2bb4055083 100644
--- a/src/cmd/compile/abi-internal.md
+++ b/src/cmd/compile/abi-internal.md
@@ -233,7 +233,7 @@ stack frame is laid out in the following sequence:
     r1.x    uintptr
     r1.y    [2]uintptr
     a1Spill uint8
-    a2Spill uint8
+    a3Spill uint8
     _       [6]uint8  // alignment padding
 
 In the stack frame, only the `a2` field is initialized on entry; the
@@ -402,7 +402,7 @@ without corrupting arguments or results.
 Special-purpose registers are as follows:
 
 | Register | Call meaning | Return meaning | Body meaning |
-| --- | --- | --- |
+| --- | --- | --- | --- |
 | RSP | Stack pointer | Same | Same |
 | RBP | Frame pointer | Same | Same |
 | RDX | Closure context pointer | Scratch | Scratch |
diff --git a/src/cmd/compile/internal/abi/abiutils.go b/src/cmd/compile/internal/abi/abiutils.go
index cb8e9d7b0f..d657ddc867 100644
--- a/src/cmd/compile/internal/abi/abiutils.go
+++ b/src/cmd/compile/internal/abi/abiutils.go
@@ -446,35 +446,20 @@ func (config *ABIConfig) ABIAnalyze(t *types.Type, setNname bool) *ABIParamResul
 	return result
 }
 
-// parameterUpdateMu protects the Offset field of function/method parameters (a subset of structure Fields)
-var parameterUpdateMu sync.Mutex
-
-// FieldOffsetOf returns a concurency-safe version of f.Offset
-func FieldOffsetOf(f *types.Field) int64 {
-	parameterUpdateMu.Lock()
-	defer parameterUpdateMu.Unlock()
-	return f.Offset
-}
-
 func (config *ABIConfig) updateOffset(result *ABIParamResultInfo, f *types.Field, a ABIParamAssignment, isReturn, setNname bool) {
 	// Everything except return values in registers has either a frame home (if not in a register) or a frame spill location.
 	if !isReturn || len(a.Registers) == 0 {
 		// The type frame offset DOES NOT show effects of minimum frame size.
 		// Getting this wrong breaks stackmaps, see liveness/plive.go:WriteFuncMap and typebits/typebits.go:Set
-		parameterUpdateMu.Lock()
-		defer parameterUpdateMu.Unlock()
 		off := a.FrameOffset(result)
 		fOffset := f.Offset
 		if fOffset == types.BOGUS_FUNARG_OFFSET {
-			// Set the Offset the first time. After that, we may recompute it, but it should never change.
-			f.Offset = off
-			if f.Nname != nil {
-				// always set it in this case.
+			if setNname && f.Nname != nil {
 				f.Nname.(*ir.Name).SetFrameOffset(off)
 				f.Nname.(*ir.Name).SetIsOutputParamInRegisters(false)
 			}
-		} else if fOffset != off {
-			base.Fatalf("offset for %s at %s changed from %d to %d", f.Sym.Name, base.FmtPos(f.Pos), fOffset, off)
+		} else {
+			base.Fatalf("field offset for %s at %s has been set to %d", f.Sym.Name, base.FmtPos(f.Pos), fOffset)
 		}
 	} else {
 		if setNname && f.Nname != nil {
diff --git a/src/cmd/compile/internal/dwarfgen/dwarf.go b/src/cmd/compile/internal/dwarfgen/dwarf.go
index 422c7e66c4..0e22b61bc3 100644
--- a/src/cmd/compile/internal/dwarfgen/dwarf.go
+++ b/src/cmd/compile/internal/dwarfgen/dwarf.go
@@ -222,9 +222,64 @@ func createDwarfVars(fnsym *obj.LSym, complexOK bool, fn *ir.Func, apDecls []*ir
 		fnsym.Func().RecordAutoType(reflectdata.TypeLinksym(n.Type()))
 	}
 
+	// Sort decls and vars.
+	sortDeclsAndVars(fn, decls, vars)
+
 	return decls, vars
 }
 
+// sortDeclsAndVars sorts the decl and dwarf var lists according to
+// parameter declaration order, so as to insure that when a subprogram
+// DIE is emitted, its parameter children appear in declaration order.
+// Prior to the advent of the register ABI, sorting by frame offset
+// would achieve this; with the register we now need to go back to the
+// original function signature.
+func sortDeclsAndVars(fn *ir.Func, decls []*ir.Name, vars []*dwarf.Var) {
+	paramOrder := make(map[*ir.Name]int)
+	idx := 1
+	for _, selfn := range types.RecvsParamsResults {
+		fsl := selfn(fn.Type()).FieldSlice()
+		for _, f := range fsl {
+			if n, ok := f.Nname.(*ir.Name); ok {
+				paramOrder[n] = idx
+				idx++
+			}
+		}
+	}
+	sort.Stable(varsAndDecls{decls, vars, paramOrder})
+}
+
+type varsAndDecls struct {
+	decls      []*ir.Name
+	vars       []*dwarf.Var
+	paramOrder map[*ir.Name]int
+}
+
+func (v varsAndDecls) Len() int {
+	return len(v.decls)
+}
+
+func (v varsAndDecls) Less(i, j int) bool {
+	nameLT := func(ni, nj *ir.Name) bool {
+		oi, foundi := v.paramOrder[ni]
+		oj, foundj := v.paramOrder[nj]
+		if foundi {
+			if foundj {
+				return oi < oj
+			} else {
+				return true
+			}
+		}
+		return false
+	}
+	return nameLT(v.decls[i], v.decls[j])
+}
+
+func (v varsAndDecls) Swap(i, j int) {
+	v.vars[i], v.vars[j] = v.vars[j], v.vars[i]
+	v.decls[i], v.decls[j] = v.decls[j], v.decls[i]
+}
+
 // Given a function that was inlined at some point during the
 // compilation, return a sorted list of nodes corresponding to the
 // autos/locals in that function prior to inlining. If this is a
@@ -476,6 +531,14 @@ func RecordFlags(flags ...string) {
 		fmt.Fprintf(&cmd, " -%s=%v", f.Name, getter.Get())
 	}
 
+	// Adds flag to producer string singalling whether regabi is turned on or
+	// off.
+	// Once regabi is turned on across the board and the relative GOEXPERIMENT
+	// knobs no longer exist this code should be removed.
+	if buildcfg.Experiment.RegabiArgs {
+		cmd.Write([]byte(" regabi"))
+	}
+
 	if cmd.Len() == 0 {
 		return
 	}
diff --git a/src/cmd/compile/internal/escape/escape.go b/src/cmd/compile/internal/escape/escape.go
index 3ac7ff1ebe..cd56f07b61 100644
--- a/src/cmd/compile/internal/escape/escape.go
+++ b/src/cmd/compile/internal/escape/escape.go
@@ -2013,14 +2013,14 @@ func HeapAllocReason(n ir.Node) string {
 		return "too large for stack"
 	}
 
-	if (n.Op() == ir.ONEW || n.Op() == ir.OPTRLIT) && n.Type().Elem().Width >= ir.MaxImplicitStackVarSize {
+	if (n.Op() == ir.ONEW || n.Op() == ir.OPTRLIT) && n.Type().Elem().Width > ir.MaxImplicitStackVarSize {
 		return "too large for stack"
 	}
 
-	if n.Op() == ir.OCLOSURE && typecheck.ClosureType(n.(*ir.ClosureExpr)).Size() >= ir.MaxImplicitStackVarSize {
+	if n.Op() == ir.OCLOSURE && typecheck.ClosureType(n.(*ir.ClosureExpr)).Size() > ir.MaxImplicitStackVarSize {
 		return "too large for stack"
 	}
-	if n.Op() == ir.OCALLPART && typecheck.PartialCallType(n.(*ir.SelectorExpr)).Size() >= ir.MaxImplicitStackVarSize {
+	if n.Op() == ir.OCALLPART && typecheck.PartialCallType(n.(*ir.SelectorExpr)).Size() > ir.MaxImplicitStackVarSize {
 		return "too large for stack"
 	}
 
@@ -2033,7 +2033,7 @@ func HeapAllocReason(n ir.Node) string {
 		if !ir.IsSmallIntConst(r) {
 			return "non-constant size"
 		}
-		if t := n.Type(); t.Elem().Width != 0 && ir.Int64Val(r) >= ir.MaxImplicitStackVarSize/t.Elem().Width {
+		if t := n.Type(); t.Elem().Width != 0 && ir.Int64Val(r) > ir.MaxImplicitStackVarSize/t.Elem().Width {
 			return "too large for stack"
 		}
 	}
diff --git a/src/cmd/compile/internal/gc/compile.go b/src/cmd/compile/internal/gc/compile.go
index a7380510d1..00504451a8 100644
--- a/src/cmd/compile/internal/gc/compile.go
+++ b/src/cmd/compile/internal/gc/compile.go
@@ -119,38 +119,51 @@ func compileFunctions() {
 		})
 	}
 
-	// We queue up a goroutine per function that needs to be
-	// compiled, but require them to grab an available worker ID
-	// before doing any substantial work to limit parallelism.
-	workerIDs := make(chan int, base.Flag.LowerC)
-	for i := 0; i < base.Flag.LowerC; i++ {
-		workerIDs <- i
+	// By default, we perform work right away on the current goroutine
+	// as the solo worker.
+	queue := func(work func(int)) {
+		work(0)
+	}
+
+	if nWorkers := base.Flag.LowerC; nWorkers > 1 {
+		// For concurrent builds, we create a goroutine per task, but
+		// require them to hold a unique worker ID while performing work
+		// to limit parallelism.
+		workerIDs := make(chan int, nWorkers)
+		for i := 0; i < nWorkers; i++ {
+			workerIDs <- i
+		}
+
+		queue = func(work func(int)) {
+			go func() {
+				worker := <-workerIDs
+				work(worker)
+				workerIDs <- worker
+			}()
+		}
 	}
 
 	var wg sync.WaitGroup
-	var asyncCompile func(*ir.Func)
-	asyncCompile = func(fn *ir.Func) {
-		wg.Add(1)
-		go func() {
-			worker := <-workerIDs
-			ssagen.Compile(fn, worker)
-			workerIDs <- worker
-
-			// Done compiling fn. Schedule it's closures for compilation.
-			for _, closure := range fn.Closures {
-				asyncCompile(closure)
-			}
-			wg.Done()
-		}()
+	var compile func([]*ir.Func)
+	compile = func(fns []*ir.Func) {
+		wg.Add(len(fns))
+		for _, fn := range fns {
+			fn := fn
+			queue(func(worker int) {
+				ssagen.Compile(fn, worker)
+				compile(fn.Closures)
+				wg.Done()
+			})
+		}
 	}
 
 	types.CalcSizeDisabled = true // not safe to calculate sizes concurrently
 	base.Ctxt.InParallel = true
-	for _, fn := range compilequeue {
-		asyncCompile(fn)
-	}
+
+	compile(compilequeue)
 	compilequeue = nil
 	wg.Wait()
+
 	base.Ctxt.InParallel = false
 	types.CalcSizeDisabled = false
 }
diff --git a/src/cmd/compile/internal/gc/obj.go b/src/cmd/compile/internal/gc/obj.go
index 0b10cb8a9e..474d718525 100644
--- a/src/cmd/compile/internal/gc/obj.go
+++ b/src/cmd/compile/internal/gc/obj.go
@@ -148,6 +148,7 @@ func dumpdata() {
 	if reflectdata.ZeroSize > 0 {
 		zero := base.PkgLinksym("go.map", "zero", obj.ABI0)
 		objw.Global(zero, int32(reflectdata.ZeroSize), obj.DUPOK|obj.RODATA)
+		zero.Set(obj.AttrStatic, true)
 	}
 
 	staticdata.WriteFuncSyms()
diff --git a/src/cmd/compile/internal/inline/inl.go b/src/cmd/compile/internal/inline/inl.go
index a6829e9835..d6b4ced4e1 100644
--- a/src/cmd/compile/internal/inline/inl.go
+++ b/src/cmd/compile/internal/inline/inl.go
@@ -1124,6 +1124,10 @@ type inlsubst struct {
 	newclofn *ir.Func
 
 	fn *ir.Func // For debug -- the func that is being inlined
+
+	// If true, then don't update source positions during substitution
+	// (retain old source positions).
+	noPosUpdate bool
 }
 
 // list inlines a list of nodes.
@@ -1219,7 +1223,14 @@ func (subst *inlsubst) clovar(n *ir.Name) *ir.Name {
 // closure node.
 func (subst *inlsubst) closure(n *ir.ClosureExpr) ir.Node {
 	m := ir.Copy(n)
-	m.SetPos(subst.updatedPos(m.Pos()))
+
+	// Prior to the subst edit, set a flag in the inlsubst to
+	// indicated that we don't want to update the source positions in
+	// the new closure. If we do this, it will appear that the closure
+	// itself has things inlined into it, which is not the case. See
+	// issue #46234 for more details.
+	defer func(prev bool) { subst.noPosUpdate = prev }(subst.noPosUpdate)
+	subst.noPosUpdate = true
 	ir.EditChildren(m, subst.edit)
 
 	//fmt.Printf("Inlining func %v with closure into %v\n", subst.fn, ir.FuncName(ir.CurFunc))
@@ -1445,6 +1456,9 @@ func (subst *inlsubst) node(n ir.Node) ir.Node {
 }
 
 func (subst *inlsubst) updatedPos(xpos src.XPos) src.XPos {
+	if subst.noPosUpdate {
+		return xpos
+	}
 	pos := base.Ctxt.PosTable.Pos(xpos)
 	oldbase := pos.Base() // can be nil
 	newbase := subst.bases[oldbase]
diff --git a/src/cmd/compile/internal/noder/noder.go b/src/cmd/compile/internal/noder/noder.go
index 4c7c9fc322..5fcad096c2 100644
--- a/src/cmd/compile/internal/noder/noder.go
+++ b/src/cmd/compile/internal/noder/noder.go
@@ -882,9 +882,6 @@ func (p *noder) typeExpr(typ syntax.Expr) ir.Ntype {
 	if n == nil {
 		return nil
 	}
-	if _, ok := n.(ir.Ntype); !ok {
-		ir.Dump("NOT NTYPE", n)
-	}
 	return n.(ir.Ntype)
 }
 
diff --git a/src/cmd/compile/internal/reflectdata/alg.go b/src/cmd/compile/internal/reflectdata/alg.go
index d12d9ca0a7..0707e0b61c 100644
--- a/src/cmd/compile/internal/reflectdata/alg.go
+++ b/src/cmd/compile/internal/reflectdata/alg.go
@@ -6,6 +6,7 @@ package reflectdata
 
 import (
 	"fmt"
+	"math/bits"
 	"sort"
 
 	"cmd/compile/internal/base"
@@ -47,6 +48,11 @@ func eqCanPanic(t *types.Type) bool {
 func AlgType(t *types.Type) types.AlgKind {
 	a, _ := types.AlgType(t)
 	if a == types.AMEM {
+		if t.Alignment() < int64(base.Ctxt.Arch.Alignment) && t.Alignment() < t.Width {
+			// For example, we can't treat [2]int16 as an int32 if int32s require
+			// 4-byte alignment. See issue 46283.
+			return a
+		}
 		switch t.Width {
 		case 0:
 			return types.AMEM0
@@ -769,6 +775,20 @@ func memrun(t *types.Type, start int) (size int64, next int) {
 		if f := t.Field(next); f.Sym.IsBlank() || !isRegularMemory(f.Type) {
 			break
 		}
+		// For issue 46283, don't combine fields if the resulting load would
+		// require a larger alignment than the component fields.
+		if base.Ctxt.Arch.Alignment > 1 {
+			align := t.Alignment()
+			if off := t.Field(start).Offset; off&(align-1) != 0 {
+				// Offset is less aligned than the containing type.
+				// Use offset to determine alignment.
+				align = 1 << uint(bits.TrailingZeros64(uint64(off)))
+			}
+			size := t.Field(next).End() - t.Field(start).Offset
+			if size > align {
+				break
+			}
+		}
 	}
 	return t.Field(next-1).End() - t.Field(start).Offset, next
 }
diff --git a/src/cmd/compile/internal/reflectdata/reflect.go b/src/cmd/compile/internal/reflectdata/reflect.go
index 034a092d6c..2dbb938191 100644
--- a/src/cmd/compile/internal/reflectdata/reflect.go
+++ b/src/cmd/compile/internal/reflectdata/reflect.go
@@ -5,6 +5,7 @@
 package reflectdata
 
 import (
+	"encoding/binary"
 	"fmt"
 	"internal/buildcfg"
 	"os"
@@ -473,21 +474,25 @@ func dnameField(lsym *obj.LSym, ot int, spkg *types.Pkg, ft *types.Field) int {
 
 // dnameData writes the contents of a reflect.name into s at offset ot.
 func dnameData(s *obj.LSym, ot int, name, tag string, pkg *types.Pkg, exported bool) int {
-	if len(name) > 1<<16-1 {
-		base.Fatalf("name too long: %s", name)
+	if len(name) >= 1<<29 {
+		base.Fatalf("name too long: %d %s...", len(name), name[:1024])
 	}
-	if len(tag) > 1<<16-1 {
-		base.Fatalf("tag too long: %s", tag)
+	if len(tag) >= 1<<29 {
+		base.Fatalf("tag too long: %d %s...", len(tag), tag[:1024])
 	}
+	var nameLen [binary.MaxVarintLen64]byte
+	nameLenLen := binary.PutUvarint(nameLen[:], uint64(len(name)))
+	var tagLen [binary.MaxVarintLen64]byte
+	tagLenLen := binary.PutUvarint(tagLen[:], uint64(len(tag)))
 
 	// Encode name and tag. See reflect/type.go for details.
 	var bits byte
-	l := 1 + 2 + len(name)
+	l := 1 + nameLenLen + len(name)
 	if exported {
 		bits |= 1 << 0
 	}
 	if len(tag) > 0 {
-		l += 2 + len(tag)
+		l += tagLenLen + len(tag)
 		bits |= 1 << 1
 	}
 	if pkg != nil {
@@ -495,14 +500,12 @@ func dnameData(s *obj.LSym, ot int, name, tag string, pkg *types.Pkg, exported b
 	}
 	b := make([]byte, l)
 	b[0] = bits
-	b[1] = uint8(len(name) >> 8)
-	b[2] = uint8(len(name))
-	copy(b[3:], name)
+	copy(b[1:], nameLen[:nameLenLen])
+	copy(b[1+nameLenLen:], name)
 	if len(tag) > 0 {
-		tb := b[3+len(name):]
-		tb[0] = uint8(len(tag) >> 8)
-		tb[1] = uint8(len(tag))
-		copy(tb[2:], tag)
+		tb := b[1+nameLenLen+len(name):]
+		copy(tb, tagLen[:tagLenLen])
+		copy(tb[tagLenLen:], tag)
 	}
 
 	ot = int(s.WriteBytes(base.Ctxt, int64(ot), b))
@@ -666,7 +669,7 @@ var kinds = []int{
 // tflag is documented in reflect/type.go.
 //
 // tflag values must be kept in sync with copies in:
-//	cmd/compile/internal/gc/reflect.go
+//	cmd/compile/internal/reflectdata/reflect.go
 //	cmd/link/internal/ld/decodesym.go
 //	reflect/type.go
 //	runtime/type.go
@@ -1109,6 +1112,15 @@ func writeType(t *types.Type) *obj.LSym {
 		}
 		ot = objw.Uint32(lsym, ot, flags)
 		ot = dextratype(lsym, ot, t, 0)
+		if u := t.Underlying(); u != t {
+			// If t is a named map type, also keep the underlying map
+			// type live in the binary. This is important to make sure that
+			// a named map and that same map cast to its underlying type via
+			// reflection, use the same hash function. See issue 37716.
+			r := obj.Addrel(lsym)
+			r.Sym = writeType(u)
+			r.Type = objabi.R_KEEP
+		}
 
 	case types.TPTR:
 		if t.Elem().Kind() == types.TANY {
@@ -1490,8 +1502,8 @@ func (a typesByString) Less(i, j int) bool {
 	// will be equal for the above checks, but different in DWARF output.
 	// Sort by source position to ensure deterministic order.
 	// See issues 27013 and 30202.
-	if a[i].t.Kind() == types.TINTER && a[i].t.Methods().Len() > 0 {
-		return a[i].t.Methods().Index(0).Pos.Before(a[j].t.Methods().Index(0).Pos)
+	if a[i].t.Kind() == types.TINTER && a[i].t.AllMethods().Len() > 0 {
+		return a[i].t.AllMethods().Index(0).Pos.Before(a[j].t.AllMethods().Index(0).Pos)
 	}
 	return false
 }
diff --git a/src/cmd/compile/internal/ssa/config.go b/src/cmd/compile/internal/ssa/config.go
index 4ffa047096..a8393a1999 100644
--- a/src/cmd/compile/internal/ssa/config.go
+++ b/src/cmd/compile/internal/ssa/config.go
@@ -147,13 +147,6 @@ type Frontend interface {
 
 	// Given the name for a compound type, returns the name we should use
 	// for the parts of that compound type.
-	SplitString(LocalSlot) (LocalSlot, LocalSlot)
-	SplitInterface(LocalSlot) (LocalSlot, LocalSlot)
-	SplitSlice(LocalSlot) (LocalSlot, LocalSlot, LocalSlot)
-	SplitComplex(LocalSlot) (LocalSlot, LocalSlot)
-	SplitStruct(LocalSlot, int) LocalSlot
-	SplitArray(LocalSlot) LocalSlot              // array must be length 1
-	SplitInt64(LocalSlot) (LocalSlot, LocalSlot) // returns (hi, lo)
 	SplitSlot(parent *LocalSlot, suffix string, offset int64, t *types.Type) LocalSlot
 
 	// DerefItab dereferences an itab function
diff --git a/src/cmd/compile/internal/ssa/copyelim.go b/src/cmd/compile/internal/ssa/copyelim.go
index 5954d3bec8..17f65127ee 100644
--- a/src/cmd/compile/internal/ssa/copyelim.go
+++ b/src/cmd/compile/internal/ssa/copyelim.go
@@ -26,7 +26,7 @@ func copyelim(f *Func) {
 
 	// Update named values.
 	for _, name := range f.Names {
-		values := f.NamedValues[name]
+		values := f.NamedValues[*name]
 		for i, v := range values {
 			if v.Op == OpCopy {
 				values[i] = v.Args[0]
diff --git a/src/cmd/compile/internal/ssa/deadcode.go b/src/cmd/compile/internal/ssa/deadcode.go
index 96b552ecf3..5d10dfe025 100644
--- a/src/cmd/compile/internal/ssa/deadcode.go
+++ b/src/cmd/compile/internal/ssa/deadcode.go
@@ -223,7 +223,7 @@ func deadcode(f *Func) {
 	for _, name := range f.Names {
 		j := 0
 		s.clear()
-		values := f.NamedValues[name]
+		values := f.NamedValues[*name]
 		for _, v := range values {
 			if live[v.ID] && !s.contains(v.ID) {
 				values[j] = v
@@ -232,19 +232,19 @@ func deadcode(f *Func) {
 			}
 		}
 		if j == 0 {
-			delete(f.NamedValues, name)
+			delete(f.NamedValues, *name)
 		} else {
 			f.Names[i] = name
 			i++
 			for k := len(values) - 1; k >= j; k-- {
 				values[k] = nil
 			}
-			f.NamedValues[name] = values[:j]
+			f.NamedValues[*name] = values[:j]
 		}
 	}
 	clearNames := f.Names[i:]
 	for j := range clearNames {
-		clearNames[j] = LocalSlot{}
+		clearNames[j] = nil
 	}
 	f.Names = f.Names[:i]
 
diff --git a/src/cmd/compile/internal/ssa/debug.go b/src/cmd/compile/internal/ssa/debug.go
index 0ca435e515..8e2872363b 100644
--- a/src/cmd/compile/internal/ssa/debug.go
+++ b/src/cmd/compile/internal/ssa/debug.go
@@ -7,10 +7,13 @@ package ssa
 import (
 	"cmd/compile/internal/abi"
 	"cmd/compile/internal/ir"
+	"cmd/compile/internal/types"
 	"cmd/internal/dwarf"
 	"cmd/internal/obj"
+	"cmd/internal/src"
 	"encoding/hex"
 	"fmt"
+	"internal/buildcfg"
 	"math/bits"
 	"sort"
 	"strings"
@@ -335,6 +338,216 @@ func (s *debugState) stateString(state stateAtPC) string {
 	return strings.Join(strs, "")
 }
 
+// slotCanonicalizer is a table used to lookup and canonicalize
+// LocalSlot's in a type insensitive way (e.g. taking into account the
+// base name, offset, and width of the slot, but ignoring the slot
+// type).
+type slotCanonicalizer struct {
+	slmap  map[slotKey]SlKeyIdx
+	slkeys []LocalSlot
+}
+
+func newSlotCanonicalizer() *slotCanonicalizer {
+	return &slotCanonicalizer{
+		slmap:  make(map[slotKey]SlKeyIdx),
+		slkeys: []LocalSlot{LocalSlot{N: nil}},
+	}
+}
+
+type SlKeyIdx uint32
+
+const noSlot = SlKeyIdx(0)
+
+// slotKey is a type-insensitive encapsulation of a LocalSlot; it
+// is used to key a map within slotCanonicalizer.
+type slotKey struct {
+	name        *ir.Name
+	offset      int64
+	width       int64
+	splitOf     SlKeyIdx // idx in slkeys slice in slotCanonicalizer
+	splitOffset int64
+}
+
+// lookup looks up a LocalSlot in the slot canonicalizer "sc", returning
+// a canonical index for the slot, and adding it to the table if need
+// be. Return value is the canonical slot index, and a boolean indicating
+// whether the slot was found in the table already (TRUE => found).
+func (sc *slotCanonicalizer) lookup(ls LocalSlot) (SlKeyIdx, bool) {
+	split := noSlot
+	if ls.SplitOf != nil {
+		split, _ = sc.lookup(*ls.SplitOf)
+	}
+	k := slotKey{
+		name: ls.N, offset: ls.Off, width: ls.Type.Width,
+		splitOf: split, splitOffset: ls.SplitOffset,
+	}
+	if idx, ok := sc.slmap[k]; ok {
+		return idx, true
+	}
+	rv := SlKeyIdx(len(sc.slkeys))
+	sc.slkeys = append(sc.slkeys, ls)
+	sc.slmap[k] = rv
+	return rv, false
+}
+
+func (sc *slotCanonicalizer) canonSlot(idx SlKeyIdx) LocalSlot {
+	return sc.slkeys[idx]
+}
+
+// PopulateABIInRegArgOps examines the entry block of the function
+// and looks for incoming parameters that have missing or partial
+// OpArg{Int,Float}Reg values, inserting additional values in
+// cases where they are missing. Example:
+//
+//      func foo(s string, used int, notused int) int {
+//        return len(s) + used
+//      }
+//
+// In the function above, the incoming parameter "used" is fully live,
+// "notused" is not live, and "s" is partially live (only the length
+// field of the string is used). At the point where debug value
+// analysis runs, we might expect to see an entry block with:
+//
+//   b1:
+//     v4 = ArgIntReg  {s+8} [0] : BX
+//     v5 = ArgIntReg  {used} [0] : CX
+//
+// While this is an accurate picture of the live incoming params,
+// we also want to have debug locations for non-live params (or
+// their non-live pieces), e.g. something like
+//
+//   b1:
+//     v9 = ArgIntReg <*uint8> {s+0} [0] : AX
+//     v4 = ArgIntReg  {s+8} [0] : BX
+//     v5 = ArgIntReg  {used} [0] : CX
+//     v10 = ArgIntReg  {unused} [0] : DI
+//
+// This function examines the live OpArg{Int,Float}Reg values and
+// synthesizes new (dead) values for the non-live params or the
+// non-live pieces of partially live params.
+//
+func PopulateABIInRegArgOps(f *Func) {
+	pri := f.ABISelf.ABIAnalyzeFuncType(f.Type.FuncType())
+
+	// When manufacturing new slots that correspond to splits of
+	// composite parameters, we want to avoid creating a new sub-slot
+	// that differs from some existing sub-slot only by type, since
+	// the debug location analysis will treat that slot as a separate
+	// entity. To achieve this, create a lookup table of existing
+	// slots that is type-insenstitive.
+	sc := newSlotCanonicalizer()
+	for _, sl := range f.Names {
+		sc.lookup(*sl)
+	}
+
+	// Add slot -> value entry to f.NamedValues if not already present.
+	addToNV := func(v *Value, sl LocalSlot) {
+		values, ok := f.NamedValues[sl]
+		if !ok {
+			// Haven't seen this slot yet.
+			sla := f.localSlotAddr(sl)
+			f.Names = append(f.Names, sla)
+		} else {
+			for _, ev := range values {
+				if v == ev {
+					return
+				}
+			}
+		}
+		values = append(values, v)
+		f.NamedValues[sl] = values
+	}
+
+	newValues := []*Value{}
+
+	abiRegIndexToRegister := func(reg abi.RegIndex) int8 {
+		i := f.ABISelf.FloatIndexFor(reg)
+		if i >= 0 { // float PR
+			return f.Config.floatParamRegs[i]
+		} else {
+			return f.Config.intParamRegs[reg]
+		}
+	}
+
+	// Helper to construct a new OpArg{Float,Int}Reg op value.
+	var pos src.XPos
+	if len(f.Entry.Values) != 0 {
+		pos = f.Entry.Values[0].Pos
+	}
+	synthesizeOpIntFloatArg := func(n *ir.Name, t *types.Type, reg abi.RegIndex, sl LocalSlot) *Value {
+		aux := &AuxNameOffset{n, sl.Off}
+		op, auxInt := ArgOpAndRegisterFor(reg, f.ABISelf)
+		v := f.newValueNoBlock(op, t, pos)
+		v.AuxInt = auxInt
+		v.Aux = aux
+		v.Args = nil
+		v.Block = f.Entry
+		newValues = append(newValues, v)
+		addToNV(v, sl)
+		f.setHome(v, &f.Config.registers[abiRegIndexToRegister(reg)])
+		return v
+	}
+
+	// Make a pass through the entry block looking for
+	// OpArg{Int,Float}Reg ops. Record the slots they use in a table
+	// ("sc"). We use a type-insensitive lookup for the slot table,
+	// since the type we get from the ABI analyzer won't always match
+	// what the compiler uses when creating OpArg{Int,Float}Reg ops.
+	for _, v := range f.Entry.Values {
+		if v.Op == OpArgIntReg || v.Op == OpArgFloatReg {
+			aux := v.Aux.(*AuxNameOffset)
+			sl := LocalSlot{N: aux.Name, Type: v.Type, Off: aux.Offset}
+			// install slot in lookup table
+			idx, _ := sc.lookup(sl)
+			// add to f.NamedValues if not already present
+			addToNV(v, sc.canonSlot(idx))
+		} else if v.Op.IsCall() {
+			// if we hit a call, we've gone too far.
+			break
+		}
+	}
+
+	// Now make a pass through the ABI in-params, looking for params
+	// or pieces of params that we didn't encounter in the loop above.
+	for _, inp := range pri.InParams() {
+		if !isNamedRegParam(inp) {
+			continue
+		}
+		n := inp.Name.(*ir.Name)
+
+		// Param is spread across one or more registers. Walk through
+		// each piece to see whether we've seen an arg reg op for it.
+		types, offsets := inp.RegisterTypesAndOffsets()
+		for k, t := range types {
+			// Note: this recipe for creating a LocalSlot is designed
+			// to be compatible with the one used in expand_calls.go
+			// as opposed to decompose.go. The expand calls code just
+			// takes the base name and creates an offset into it,
+			// without using the SplitOf/SplitOffset fields. The code
+			// in decompose.go does the opposite -- it creates a
+			// LocalSlot object with "Off" set to zero, but with
+			// SplitOf pointing to a parent slot, and SplitOffset
+			// holding the offset into the parent object.
+			pieceSlot := LocalSlot{N: n, Type: t, Off: offsets[k]}
+
+			// Look up this piece to see if we've seen a reg op
+			// for it. If not, create one.
+			_, found := sc.lookup(pieceSlot)
+			if !found {
+				// This slot doesn't appear in the map, meaning it
+				// corresponds to an in-param that is not live, or
+				// a portion of an in-param that is not live/used.
+				// Add a new dummy OpArg{Int,Float}Reg for it.
+				synthesizeOpIntFloatArg(n, t, inp.Registers[k],
+					pieceSlot)
+			}
+		}
+	}
+
+	// Insert the new values into the head of the block.
+	f.Entry.Values = append(newValues, f.Entry.Values...)
+}
+
 // BuildFuncDebug returns debug information for f.
 // f must be fully processed, so that each Value is where it will be when
 // machine code is emitted.
@@ -349,6 +562,10 @@ func BuildFuncDebug(ctxt *obj.Link, f *Func, loggingEnabled bool, stackOffset fu
 	state.stackOffset = stackOffset
 	state.ctxt = ctxt
 
+	if buildcfg.Experiment.RegabiArgs {
+		PopulateABIInRegArgOps(f)
+	}
+
 	if state.loggingEnabled {
 		state.logf("Generating location lists for function %q\n", f.Name)
 	}
@@ -367,12 +584,12 @@ func BuildFuncDebug(ctxt *obj.Link, f *Func, loggingEnabled bool, stackOffset fu
 	state.slots = state.slots[:0]
 	state.vars = state.vars[:0]
 	for i, slot := range f.Names {
-		state.slots = append(state.slots, slot)
+		state.slots = append(state.slots, *slot)
 		if ir.IsSynthetic(slot.N) {
 			continue
 		}
 
-		topSlot := &slot
+		topSlot := slot
 		for topSlot.SplitOf != nil {
 			topSlot = topSlot.SplitOf
 		}
@@ -436,7 +653,7 @@ func BuildFuncDebug(ctxt *obj.Link, f *Func, loggingEnabled bool, stackOffset fu
 		if ir.IsSynthetic(slot.N) {
 			continue
 		}
-		for _, value := range f.NamedValues[slot] {
+		for _, value := range f.NamedValues[*slot] {
 			state.valueNames[value.ID] = append(state.valueNames[value.ID], SlotID(i))
 		}
 	}
@@ -898,8 +1115,14 @@ func (state *debugState) buildLocationLists(blockLocs []*BlockDebug) {
 			continue
 		}
 
+		mustBeFirst := func(v *Value) bool {
+			return v.Op == OpPhi || v.Op.isLoweredGetClosurePtr() ||
+				v.Op == OpArgIntReg || v.Op == OpArgFloatReg
+		}
+
 		zeroWidthPending := false
-		apcChangedSize := 0 // size of changedVars for leading Args, Phi, ClosurePtr
+		blockPrologComplete := false // set to true at first non-zero-width op
+		apcChangedSize := 0          // size of changedVars for leading Args, Phi, ClosurePtr
 		// expect to see values in pattern (apc)* (zerowidth|real)*
 		for _, v := range b.Values {
 			slots := state.valueNames[v.ID]
@@ -908,16 +1131,16 @@ func (state *debugState) buildLocationLists(blockLocs []*BlockDebug) {
 
 			if opcodeTable[v.Op].zeroWidth {
 				if changed {
-					if hasAnyArgOp(v) || v.Op == OpPhi || v.Op.isLoweredGetClosurePtr() {
+					if mustBeFirst(v) || v.Op == OpArg {
 						// These ranges begin at true beginning of block, not after first instruction
-						if zeroWidthPending {
-							panic(fmt.Errorf("Unexpected op '%s' mixed with OpArg/OpPhi/OpLoweredGetClosurePtr at beginning of block %s in %s\n%s", v.LongString(), b, b.Func.Name, b.Func))
+						if blockPrologComplete && mustBeFirst(v) {
+							panic(fmt.Errorf("Unexpected placement of op '%s' appearing after non-pseudo-op at beginning of block %s in %s\n%s", v.LongString(), b, b.Func.Name, b.Func))
 						}
 						apcChangedSize = len(state.changedVars.contents())
+						// Other zero-width ops must wait on a "real" op.
+						zeroWidthPending = true
 						continue
 					}
-					// Other zero-width ops must wait on a "real" op.
-					zeroWidthPending = true
 				}
 				continue
 			}
@@ -928,6 +1151,7 @@ func (state *debugState) buildLocationLists(blockLocs []*BlockDebug) {
 			// Not zero-width; i.e., a "real" instruction.
 
 			zeroWidthPending = false
+			blockPrologComplete = true
 			for i, varID := range state.changedVars.contents() {
 				if i < apcChangedSize { // buffered true start-of-block changes
 					state.updateVar(VarID(varID), v.Block, BlockStart)
diff --git a/src/cmd/compile/internal/ssa/decompose.go b/src/cmd/compile/internal/ssa/decompose.go
index ba48b6b3b9..753d69cebc 100644
--- a/src/cmd/compile/internal/ssa/decompose.go
+++ b/src/cmd/compile/internal/ssa/decompose.go
@@ -36,64 +36,65 @@ func decomposeBuiltIn(f *Func) {
 	// accumulate new LocalSlots in newNames for addition after the iteration.  This decomposition is for
 	// builtin types with leaf components, and thus there is no need to reprocess the newly create LocalSlots.
 	var toDelete []namedVal
-	var newNames []LocalSlot
+	var newNames []*LocalSlot
 	for i, name := range f.Names {
 		t := name.Type
 		switch {
 		case t.IsInteger() && t.Size() > f.Config.RegSize:
-			hiName, loName := f.fe.SplitInt64(name)
-			newNames = append(newNames, hiName, loName)
-			for j, v := range f.NamedValues[name] {
+			hiName, loName := f.SplitInt64(name)
+			newNames = maybeAppend2(f, newNames, hiName, loName)
+			for j, v := range f.NamedValues[*name] {
 				if v.Op != OpInt64Make {
 					continue
 				}
-				f.NamedValues[hiName] = append(f.NamedValues[hiName], v.Args[0])
-				f.NamedValues[loName] = append(f.NamedValues[loName], v.Args[1])
+				f.NamedValues[*hiName] = append(f.NamedValues[*hiName], v.Args[0])
+				f.NamedValues[*loName] = append(f.NamedValues[*loName], v.Args[1])
 				toDelete = append(toDelete, namedVal{i, j})
 			}
 		case t.IsComplex():
-			rName, iName := f.fe.SplitComplex(name)
-			newNames = append(newNames, rName, iName)
-			for j, v := range f.NamedValues[name] {
+			rName, iName := f.SplitComplex(name)
+			newNames = maybeAppend2(f, newNames, rName, iName)
+			for j, v := range f.NamedValues[*name] {
 				if v.Op != OpComplexMake {
 					continue
 				}
-				f.NamedValues[rName] = append(f.NamedValues[rName], v.Args[0])
-				f.NamedValues[iName] = append(f.NamedValues[iName], v.Args[1])
+				f.NamedValues[*rName] = append(f.NamedValues[*rName], v.Args[0])
+				f.NamedValues[*iName] = append(f.NamedValues[*iName], v.Args[1])
 				toDelete = append(toDelete, namedVal{i, j})
 			}
 		case t.IsString():
-			ptrName, lenName := f.fe.SplitString(name)
-			newNames = append(newNames, ptrName, lenName)
-			for j, v := range f.NamedValues[name] {
+			ptrName, lenName := f.SplitString(name)
+			newNames = maybeAppend2(f, newNames, ptrName, lenName)
+			for j, v := range f.NamedValues[*name] {
 				if v.Op != OpStringMake {
 					continue
 				}
-				f.NamedValues[ptrName] = append(f.NamedValues[ptrName], v.Args[0])
-				f.NamedValues[lenName] = append(f.NamedValues[lenName], v.Args[1])
+				f.NamedValues[*ptrName] = append(f.NamedValues[*ptrName], v.Args[0])
+				f.NamedValues[*lenName] = append(f.NamedValues[*lenName], v.Args[1])
 				toDelete = append(toDelete, namedVal{i, j})
 			}
 		case t.IsSlice():
-			ptrName, lenName, capName := f.fe.SplitSlice(name)
-			newNames = append(newNames, ptrName, lenName, capName)
-			for j, v := range f.NamedValues[name] {
+			ptrName, lenName, capName := f.SplitSlice(name)
+			newNames = maybeAppend2(f, newNames, ptrName, lenName)
+			newNames = maybeAppend(f, newNames, capName)
+			for j, v := range f.NamedValues[*name] {
 				if v.Op != OpSliceMake {
 					continue
 				}
-				f.NamedValues[ptrName] = append(f.NamedValues[ptrName], v.Args[0])
-				f.NamedValues[lenName] = append(f.NamedValues[lenName], v.Args[1])
-				f.NamedValues[capName] = append(f.NamedValues[capName], v.Args[2])
+				f.NamedValues[*ptrName] = append(f.NamedValues[*ptrName], v.Args[0])
+				f.NamedValues[*lenName] = append(f.NamedValues[*lenName], v.Args[1])
+				f.NamedValues[*capName] = append(f.NamedValues[*capName], v.Args[2])
 				toDelete = append(toDelete, namedVal{i, j})
 			}
 		case t.IsInterface():
-			typeName, dataName := f.fe.SplitInterface(name)
-			newNames = append(newNames, typeName, dataName)
-			for j, v := range f.NamedValues[name] {
+			typeName, dataName := f.SplitInterface(name)
+			newNames = maybeAppend2(f, newNames, typeName, dataName)
+			for j, v := range f.NamedValues[*name] {
 				if v.Op != OpIMake {
 					continue
 				}
-				f.NamedValues[typeName] = append(f.NamedValues[typeName], v.Args[0])
-				f.NamedValues[dataName] = append(f.NamedValues[dataName], v.Args[1])
+				f.NamedValues[*typeName] = append(f.NamedValues[*typeName], v.Args[0])
+				f.NamedValues[*dataName] = append(f.NamedValues[*dataName], v.Args[1])
 				toDelete = append(toDelete, namedVal{i, j})
 			}
 		case t.IsFloat():
@@ -107,6 +108,18 @@ func decomposeBuiltIn(f *Func) {
 	f.Names = append(f.Names, newNames...)
 }
 
+func maybeAppend(f *Func, ss []*LocalSlot, s *LocalSlot) []*LocalSlot {
+	if _, ok := f.NamedValues[*s]; !ok {
+		f.NamedValues[*s] = nil
+		return append(ss, s)
+	}
+	return ss
+}
+
+func maybeAppend2(f *Func, ss []*LocalSlot, s1, s2 *LocalSlot) []*LocalSlot {
+	return maybeAppend(f, maybeAppend(f, ss, s1), s2)
+}
+
 func decomposeBuiltInPhi(v *Value) {
 	switch {
 	case v.Type.IsInteger() && v.Type.Size() > v.Block.Func.Config.RegSize:
@@ -230,7 +243,7 @@ func decomposeUser(f *Func) {
 	}
 	// Split up named values into their components.
 	i := 0
-	var newNames []LocalSlot
+	var newNames []*LocalSlot
 	for _, name := range f.Names {
 		t := name.Type
 		switch {
@@ -250,7 +263,7 @@ func decomposeUser(f *Func) {
 // decomposeUserArrayInto creates names for the element(s) of arrays referenced
 // by name where possible, and appends those new names to slots, which is then
 // returned.
-func decomposeUserArrayInto(f *Func, name LocalSlot, slots []LocalSlot) []LocalSlot {
+func decomposeUserArrayInto(f *Func, name *LocalSlot, slots []*LocalSlot) []*LocalSlot {
 	t := name.Type
 	if t.NumElem() == 0 {
 		// TODO(khr): Not sure what to do here.  Probably nothing.
@@ -261,20 +274,20 @@ func decomposeUserArrayInto(f *Func, name LocalSlot, slots []LocalSlot) []LocalS
 		// shouldn't get here due to CanSSA
 		f.Fatalf("array not of size 1")
 	}
-	elemName := f.fe.SplitArray(name)
+	elemName := f.SplitArray(name)
 	var keep []*Value
-	for _, v := range f.NamedValues[name] {
+	for _, v := range f.NamedValues[*name] {
 		if v.Op != OpArrayMake1 {
 			keep = append(keep, v)
 			continue
 		}
-		f.NamedValues[elemName] = append(f.NamedValues[elemName], v.Args[0])
+		f.NamedValues[*elemName] = append(f.NamedValues[*elemName], v.Args[0])
 	}
 	if len(keep) == 0 {
 		// delete the name for the array as a whole
-		delete(f.NamedValues, name)
+		delete(f.NamedValues, *name)
 	} else {
-		f.NamedValues[name] = keep
+		f.NamedValues[*name] = keep
 	}
 
 	if t.Elem().IsArray() {
@@ -289,38 +302,38 @@ func decomposeUserArrayInto(f *Func, name LocalSlot, slots []LocalSlot) []LocalS
 // decomposeUserStructInto creates names for the fields(s) of structs referenced
 // by name where possible, and appends those new names to slots, which is then
 // returned.
-func decomposeUserStructInto(f *Func, name LocalSlot, slots []LocalSlot) []LocalSlot {
-	fnames := []LocalSlot{} // slots for struct in name
+func decomposeUserStructInto(f *Func, name *LocalSlot, slots []*LocalSlot) []*LocalSlot {
+	fnames := []*LocalSlot{} // slots for struct in name
 	t := name.Type
 	n := t.NumFields()
 
 	for i := 0; i < n; i++ {
-		fs := f.fe.SplitStruct(name, i)
+		fs := f.SplitStruct(name, i)
 		fnames = append(fnames, fs)
 		// arrays and structs will be decomposed further, so
 		// there's no need to record a name
 		if !fs.Type.IsArray() && !fs.Type.IsStruct() {
-			slots = append(slots, fs)
+			slots = maybeAppend(f, slots, fs)
 		}
 	}
 
 	makeOp := StructMakeOp(n)
 	var keep []*Value
 	// create named values for each struct field
-	for _, v := range f.NamedValues[name] {
+	for _, v := range f.NamedValues[*name] {
 		if v.Op != makeOp {
 			keep = append(keep, v)
 			continue
 		}
 		for i := 0; i < len(fnames); i++ {
-			f.NamedValues[fnames[i]] = append(f.NamedValues[fnames[i]], v.Args[i])
+			f.NamedValues[*fnames[i]] = append(f.NamedValues[*fnames[i]], v.Args[i])
 		}
 	}
 	if len(keep) == 0 {
 		// delete the name for the struct as a whole
-		delete(f.NamedValues, name)
+		delete(f.NamedValues, *name)
 	} else {
-		f.NamedValues[name] = keep
+		f.NamedValues[*name] = keep
 	}
 
 	// now that this f.NamedValues contains values for the struct
@@ -328,10 +341,10 @@ func decomposeUserStructInto(f *Func, name LocalSlot, slots []LocalSlot) []Local
 	for i := 0; i < n; i++ {
 		if name.Type.FieldType(i).IsStruct() {
 			slots = decomposeUserStructInto(f, fnames[i], slots)
-			delete(f.NamedValues, fnames[i])
+			delete(f.NamedValues, *fnames[i])
 		} else if name.Type.FieldType(i).IsArray() {
 			slots = decomposeUserArrayInto(f, fnames[i], slots)
-			delete(f.NamedValues, fnames[i])
+			delete(f.NamedValues, *fnames[i])
 		}
 	}
 	return slots
@@ -416,9 +429,10 @@ type namedVal struct {
 	locIndex, valIndex int // f.NamedValues[f.Names[locIndex]][valIndex] = key
 }
 
-// deleteNamedVals removes particular values with debugger names from f's naming data structures
+// deleteNamedVals removes particular values with debugger names from f's naming data structures,
+// removes all values with OpInvalid, and re-sorts the list of Names.
 func deleteNamedVals(f *Func, toDelete []namedVal) {
-	// Arrange to delete from larger indices to smaller, to ensure swap-with-end deletion does not invalid pending indices.
+	// Arrange to delete from larger indices to smaller, to ensure swap-with-end deletion does not invalidate pending indices.
 	sort.Slice(toDelete, func(i, j int) bool {
 		if toDelete[i].locIndex != toDelete[j].locIndex {
 			return toDelete[i].locIndex > toDelete[j].locIndex
@@ -430,16 +444,36 @@ func deleteNamedVals(f *Func, toDelete []namedVal) {
 	// Get rid of obsolete names
 	for _, d := range toDelete {
 		loc := f.Names[d.locIndex]
-		vals := f.NamedValues[loc]
+		vals := f.NamedValues[*loc]
 		l := len(vals) - 1
 		if l > 0 {
 			vals[d.valIndex] = vals[l]
-			f.NamedValues[loc] = vals[:l]
-		} else {
-			delete(f.NamedValues, loc)
-			l = len(f.Names) - 1
-			f.Names[d.locIndex] = f.Names[l]
-			f.Names = f.Names[:l]
+		}
+		vals[l] = nil
+		f.NamedValues[*loc] = vals[:l]
+	}
+	// Delete locations with no values attached.
+	end := len(f.Names)
+	for i := len(f.Names) - 1; i >= 0; i-- {
+		loc := f.Names[i]
+		vals := f.NamedValues[*loc]
+		last := len(vals)
+		for j := len(vals) - 1; j >= 0; j-- {
+			if vals[j].Op == OpInvalid {
+				last--
+				vals[j] = vals[last]
+				vals[last] = nil
+			}
+		}
+		if last < len(vals) {
+			f.NamedValues[*loc] = vals[:last]
+		}
+		if len(vals) == 0 {
+			delete(f.NamedValues, *loc)
+			end--
+			f.Names[i] = f.Names[end]
+			f.Names[end] = nil
 		}
 	}
+	f.Names = f.Names[:end]
 }
diff --git a/src/cmd/compile/internal/ssa/expand_calls.go b/src/cmd/compile/internal/ssa/expand_calls.go
index 2852753bee..7e973ab205 100644
--- a/src/cmd/compile/internal/ssa/expand_calls.go
+++ b/src/cmd/compile/internal/ssa/expand_calls.go
@@ -243,10 +243,10 @@ func (x *expandState) offsetFrom(b *Block, from *Value, offset int64, pt *types.
 }
 
 // splitSlots splits one "field" (specified by sfx, offset, and ty) out of the LocalSlots in ls and returns the new LocalSlots this generates.
-func (x *expandState) splitSlots(ls []LocalSlot, sfx string, offset int64, ty *types.Type) []LocalSlot {
-	var locs []LocalSlot
+func (x *expandState) splitSlots(ls []*LocalSlot, sfx string, offset int64, ty *types.Type) []*LocalSlot {
+	var locs []*LocalSlot
 	for i := range ls {
-		locs = append(locs, x.f.fe.SplitSlot(&ls[i], sfx, offset, ty))
+		locs = append(locs, x.f.SplitSlot(ls[i], sfx, offset, ty))
 	}
 	return locs
 }
@@ -301,13 +301,13 @@ func (x *expandState) Printf(format string, a ...interface{}) (n int, err error)
 // It emits the code necessary to implement the leaf select operation that leads to the root.
 //
 // TODO when registers really arrive, must also decompose anything split across two registers or registers and memory.
-func (x *expandState) rewriteSelect(leaf *Value, selector *Value, offset int64, regOffset Abi1RO) []LocalSlot {
+func (x *expandState) rewriteSelect(leaf *Value, selector *Value, offset int64, regOffset Abi1RO) []*LocalSlot {
 	if x.debug {
 		x.indent(3)
 		defer x.indent(-3)
 		x.Printf("rewriteSelect(%s; %s; memOff=%d; regOff=%d)\n", leaf.LongString(), selector.LongString(), offset, regOffset)
 	}
-	var locs []LocalSlot
+	var locs []*LocalSlot
 	leafType := leaf.Type
 	if len(selector.Args) > 0 {
 		w := selector.Args[0]
@@ -477,7 +477,7 @@ func (x *expandState) rewriteSelect(leaf *Value, selector *Value, offset int64,
 
 	case OpStructSelect:
 		w := selector.Args[0]
-		var ls []LocalSlot
+		var ls []*LocalSlot
 		if w.Type.Kind() != types.TSTRUCT { // IData artifact
 			ls = x.rewriteSelect(leaf, w, offset, regOffset)
 		} else {
@@ -485,7 +485,7 @@ func (x *expandState) rewriteSelect(leaf *Value, selector *Value, offset int64,
 			ls = x.rewriteSelect(leaf, w, offset+w.Type.FieldOff(fldi), regOffset+x.regOffset(w.Type, fldi))
 			if w.Op != OpIData {
 				for _, l := range ls {
-					locs = append(locs, x.f.fe.SplitStruct(l, int(selector.AuxInt)))
+					locs = append(locs, x.f.SplitStruct(l, int(selector.AuxInt)))
 				}
 			}
 		}
@@ -662,7 +662,7 @@ outer:
 func (x *expandState) decomposeArg(pos src.XPos, b *Block, source, mem *Value, t *types.Type, storeOffset int64, loadRegOffset Abi1RO, storeRc registerCursor) *Value {
 
 	pa := x.prAssignForArg(source)
-	var locs []LocalSlot
+	var locs []*LocalSlot
 	for _, s := range x.namedSelects[source] {
 		locs = append(locs, x.f.Names[s.locIndex])
 	}
@@ -756,12 +756,15 @@ func (x *expandState) decomposeArg(pos src.XPos, b *Block, source, mem *Value, t
 	return nil
 }
 
-func (x *expandState) splitSlotsIntoNames(locs []LocalSlot, suffix string, off int64, rt *types.Type, w *Value) {
+func (x *expandState) splitSlotsIntoNames(locs []*LocalSlot, suffix string, off int64, rt *types.Type, w *Value) {
 	wlocs := x.splitSlots(locs, suffix, off, rt)
 	for _, l := range wlocs {
-		x.f.NamedValues[l] = append(x.f.NamedValues[l], w)
+		old, ok := x.f.NamedValues[*l]
+		x.f.NamedValues[*l] = append(old, w)
+		if !ok {
+			x.f.Names = append(x.f.Names, l)
+		}
 	}
-	x.f.Names = append(x.f.Names, wlocs...)
 }
 
 // decomposeLoad is a helper for storeArgOrLoad.
@@ -826,7 +829,7 @@ func (x *expandState) decomposeLoad(pos src.XPos, b *Block, source, mem *Value,
 // storeOneArg creates a decomposed (one step) arg that is then stored.
 // pos and b locate the store instruction, source is the "base" of the value input,
 // mem is the input mem, t is the type in question, and offArg and offStore are the offsets from the respective bases.
-func storeOneArg(x *expandState, pos src.XPos, b *Block, locs []LocalSlot, suffix string, source, mem *Value, t *types.Type, argOffset, storeOffset int64, loadRegOffset Abi1RO, storeRc registerCursor) *Value {
+func storeOneArg(x *expandState, pos src.XPos, b *Block, locs []*LocalSlot, suffix string, source, mem *Value, t *types.Type, argOffset, storeOffset int64, loadRegOffset Abi1RO, storeRc registerCursor) *Value {
 	if x.debug {
 		x.indent(3)
 		defer x.indent(-3)
@@ -848,7 +851,7 @@ func storeOneLoad(x *expandState, pos src.XPos, b *Block, source, mem *Value, t
 	return x.storeArgOrLoad(pos, b, w, mem, t, offStore, loadRegOffset, storeRc)
 }
 
-func storeTwoArg(x *expandState, pos src.XPos, b *Block, locs []LocalSlot, suffix1 string, suffix2 string, source, mem *Value, t1, t2 *types.Type, offArg, offStore int64, loadRegOffset Abi1RO, storeRc registerCursor) *Value {
+func storeTwoArg(x *expandState, pos src.XPos, b *Block, locs []*LocalSlot, suffix1 string, suffix2 string, source, mem *Value, t1, t2 *types.Type, offArg, offStore int64, loadRegOffset Abi1RO, storeRc registerCursor) *Value {
 	mem = storeOneArg(x, pos, b, locs, suffix1, source, mem, t1, offArg, offStore, loadRegOffset, storeRc.next(t1))
 	pos = pos.WithNotStmt()
 	t1Size := t1.Size()
@@ -1168,7 +1171,7 @@ func expandCalls(f *Func) {
 	for i, name := range f.Names {
 		t := name.Type
 		if x.isAlreadyExpandedAggregateType(t) {
-			for j, v := range f.NamedValues[name] {
+			for j, v := range f.NamedValues[*name] {
 				if v.Op == OpSelectN || v.Op == OpArg && x.isAlreadyExpandedAggregateType(v.Type) {
 					ns := x.namedSelects[v]
 					x.namedSelects[v] = append(ns, namedVal{locIndex: i, valIndex: j})
@@ -1477,10 +1480,10 @@ func expandCalls(f *Func) {
 		// Leaf types may have debug locations
 		if !x.isAlreadyExpandedAggregateType(v.Type) {
 			for _, l := range locs {
-				if _, ok := f.NamedValues[l]; !ok {
+				if _, ok := f.NamedValues[*l]; !ok {
 					f.Names = append(f.Names, l)
 				}
-				f.NamedValues[l] = append(f.NamedValues[l], v)
+				f.NamedValues[*l] = append(f.NamedValues[*l], v)
 			}
 			continue
 		}
@@ -1553,7 +1556,7 @@ func expandCalls(f *Func) {
 	// Step 6: elide any copies introduced.
 	// Update named values.
 	for _, name := range f.Names {
-		values := f.NamedValues[name]
+		values := f.NamedValues[*name]
 		for i, v := range values {
 			if v.Op == OpCopy {
 				a := v.Args[0]
@@ -1714,21 +1717,6 @@ func (x *expandState) newArgToMemOrRegs(baseArg, toReplace *Value, offset int64,
 	} else {
 		w = baseArg.Block.NewValue0IA(pos, op, t, auxInt, aux)
 	}
-	// If we are creating an OpArgIntReg/OpArgFloatReg that
-	// corresponds to an in-param that fits entirely in a register,
-	// then enter it into the name/value table. The LocalSlot
-	// is somewhat fictitious, since there is no incoming live
-	// memory version of the parameter, but we need an entry in
-	// NamedValues in order for ssa debug tracking to include
-	// the value in the tracking analysis.
-	if len(pa.Registers) == 1 {
-		loc := LocalSlot{N: aux.Name, Type: t, Off: 0}
-		values, ok := x.f.NamedValues[loc]
-		if !ok {
-			x.f.Names = append(x.f.Names, loc)
-		}
-		x.f.NamedValues[loc] = append(values, w)
-	}
 	x.commonArgs[key] = w
 	if toReplace != nil {
 		toReplace.copyOf(w)
diff --git a/src/cmd/compile/internal/ssa/export_test.go b/src/cmd/compile/internal/ssa/export_test.go
index 32e6d09d1b..8ed8a0c4a6 100644
--- a/src/cmd/compile/internal/ssa/export_test.go
+++ b/src/cmd/compile/internal/ssa/export_test.go
@@ -73,36 +73,6 @@ func (TestFrontend) Auto(pos src.XPos, t *types.Type) *ir.Name {
 	n.Class = ir.PAUTO
 	return n
 }
-func (d TestFrontend) SplitString(s LocalSlot) (LocalSlot, LocalSlot) {
-	return LocalSlot{N: s.N, Type: testTypes.BytePtr, Off: s.Off}, LocalSlot{N: s.N, Type: testTypes.Int, Off: s.Off + 8}
-}
-func (d TestFrontend) SplitInterface(s LocalSlot) (LocalSlot, LocalSlot) {
-	return LocalSlot{N: s.N, Type: testTypes.BytePtr, Off: s.Off}, LocalSlot{N: s.N, Type: testTypes.BytePtr, Off: s.Off + 8}
-}
-func (d TestFrontend) SplitSlice(s LocalSlot) (LocalSlot, LocalSlot, LocalSlot) {
-	return LocalSlot{N: s.N, Type: s.Type.Elem().PtrTo(), Off: s.Off},
-		LocalSlot{N: s.N, Type: testTypes.Int, Off: s.Off + 8},
-		LocalSlot{N: s.N, Type: testTypes.Int, Off: s.Off + 16}
-}
-func (d TestFrontend) SplitComplex(s LocalSlot) (LocalSlot, LocalSlot) {
-	if s.Type.Size() == 16 {
-		return LocalSlot{N: s.N, Type: testTypes.Float64, Off: s.Off}, LocalSlot{N: s.N, Type: testTypes.Float64, Off: s.Off + 8}
-	}
-	return LocalSlot{N: s.N, Type: testTypes.Float32, Off: s.Off}, LocalSlot{N: s.N, Type: testTypes.Float32, Off: s.Off + 4}
-}
-func (d TestFrontend) SplitInt64(s LocalSlot) (LocalSlot, LocalSlot) {
-	if s.Type.IsSigned() {
-		return LocalSlot{N: s.N, Type: testTypes.Int32, Off: s.Off + 4}, LocalSlot{N: s.N, Type: testTypes.UInt32, Off: s.Off}
-	}
-	return LocalSlot{N: s.N, Type: testTypes.UInt32, Off: s.Off + 4}, LocalSlot{N: s.N, Type: testTypes.UInt32, Off: s.Off}
-}
-func (d TestFrontend) SplitStruct(s LocalSlot, i int) LocalSlot {
-	return LocalSlot{N: s.N, Type: s.Type.FieldType(i), Off: s.Off + s.Type.FieldOff(i)}
-}
-func (d TestFrontend) SplitArray(s LocalSlot) LocalSlot {
-	return LocalSlot{N: s.N, Type: s.Type.Elem(), Off: s.Off}
-}
-
 func (d TestFrontend) SplitSlot(parent *LocalSlot, suffix string, offset int64, t *types.Type) LocalSlot {
 	return LocalSlot{N: parent.N, Type: t, Off: offset}
 }
diff --git a/src/cmd/compile/internal/ssa/flags_amd64_test.s b/src/cmd/compile/internal/ssa/flags_amd64_test.s
index 8bd87019af..7402f6badb 100644
--- a/src/cmd/compile/internal/ssa/flags_amd64_test.s
+++ b/src/cmd/compile/internal/ssa/flags_amd64_test.s
@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build amd64
-
 #include "textflag.h"
 
 TEXT ·asmAddFlags(SB),NOSPLIT,$0-24
diff --git a/src/cmd/compile/internal/ssa/flags_arm64_test.s b/src/cmd/compile/internal/ssa/flags_arm64_test.s
index f201bcc994..639d7e3aed 100644
--- a/src/cmd/compile/internal/ssa/flags_arm64_test.s
+++ b/src/cmd/compile/internal/ssa/flags_arm64_test.s
@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build arm64
-
 #include "textflag.h"
 
 TEXT ·asmAddFlags(SB),NOSPLIT,$0-24
diff --git a/src/cmd/compile/internal/ssa/func.go b/src/cmd/compile/internal/ssa/func.go
index 378a73a95a..fac876c23e 100644
--- a/src/cmd/compile/internal/ssa/func.go
+++ b/src/cmd/compile/internal/ssa/func.go
@@ -6,6 +6,7 @@ package ssa
 
 import (
 	"cmd/compile/internal/abi"
+	"cmd/compile/internal/base"
 	"cmd/compile/internal/types"
 	"cmd/internal/src"
 	"crypto/sha1"
@@ -61,7 +62,11 @@ type Func struct {
 	NamedValues map[LocalSlot][]*Value
 	// Names is a copy of NamedValues.Keys. We keep a separate list
 	// of keys to make iteration order deterministic.
-	Names []LocalSlot
+	Names []*LocalSlot
+	// Canonicalize root/top-level local slots, and canonicalize their pieces.
+	// Because LocalSlot pieces refer to their parents with a pointer, this ensures that equivalent slots really are equal.
+	CanonicalLocalSlots  map[LocalSlot]*LocalSlot
+	CanonicalLocalSplits map[LocalSlotSplitKey]*LocalSlot
 
 	// RegArgs is a slice of register-memory pairs that must be spilled and unspilled in the uncommon path of function entry.
 	RegArgs []Spill
@@ -87,10 +92,16 @@ type Func struct {
 	constants map[int64][]*Value // constants cache, keyed by constant value; users must check value's Op and Type
 }
 
+type LocalSlotSplitKey struct {
+	parent *LocalSlot
+	Off    int64       // offset of slot in N
+	Type   *types.Type // type of slot
+}
+
 // NewFunc returns a new, empty function object.
 // Caller must set f.Config and f.Cache before using f.
 func NewFunc(fe Frontend) *Func {
-	return &Func{fe: fe, NamedValues: make(map[LocalSlot][]*Value)}
+	return &Func{fe: fe, NamedValues: make(map[LocalSlot][]*Value), CanonicalLocalSlots: make(map[LocalSlot]*LocalSlot), CanonicalLocalSplits: make(map[LocalSlotSplitKey]*LocalSlot)}
 }
 
 // NumBlocks returns an integer larger than the id of any Block in the Func.
@@ -193,6 +204,101 @@ func (f *Func) retDeadcodeLiveOrderStmts(liveOrderStmts []*Value) {
 	f.Cache.deadcode.liveOrderStmts = liveOrderStmts
 }
 
+func (f *Func) localSlotAddr(slot LocalSlot) *LocalSlot {
+	a, ok := f.CanonicalLocalSlots[slot]
+	if !ok {
+		a = new(LocalSlot)
+		*a = slot // don't escape slot
+		f.CanonicalLocalSlots[slot] = a
+	}
+	return a
+}
+
+func (f *Func) SplitString(name *LocalSlot) (*LocalSlot, *LocalSlot) {
+	ptrType := types.NewPtr(types.Types[types.TUINT8])
+	lenType := types.Types[types.TINT]
+	// Split this string up into two separate variables.
+	p := f.SplitSlot(name, ".ptr", 0, ptrType)
+	l := f.SplitSlot(name, ".len", ptrType.Size(), lenType)
+	return p, l
+}
+
+func (f *Func) SplitInterface(name *LocalSlot) (*LocalSlot, *LocalSlot) {
+	n := name.N
+	u := types.Types[types.TUINTPTR]
+	t := types.NewPtr(types.Types[types.TUINT8])
+	// Split this interface up into two separate variables.
+	sfx := ".itab"
+	if n.Type().IsEmptyInterface() {
+		sfx = ".type"
+	}
+	c := f.SplitSlot(name, sfx, 0, u) // see comment in typebits.Set
+	d := f.SplitSlot(name, ".data", u.Size(), t)
+	return c, d
+}
+
+func (f *Func) SplitSlice(name *LocalSlot) (*LocalSlot, *LocalSlot, *LocalSlot) {
+	ptrType := types.NewPtr(name.Type.Elem())
+	lenType := types.Types[types.TINT]
+	p := f.SplitSlot(name, ".ptr", 0, ptrType)
+	l := f.SplitSlot(name, ".len", ptrType.Size(), lenType)
+	c := f.SplitSlot(name, ".cap", ptrType.Size()+lenType.Size(), lenType)
+	return p, l, c
+}
+
+func (f *Func) SplitComplex(name *LocalSlot) (*LocalSlot, *LocalSlot) {
+	s := name.Type.Size() / 2
+	var t *types.Type
+	if s == 8 {
+		t = types.Types[types.TFLOAT64]
+	} else {
+		t = types.Types[types.TFLOAT32]
+	}
+	r := f.SplitSlot(name, ".real", 0, t)
+	i := f.SplitSlot(name, ".imag", t.Size(), t)
+	return r, i
+}
+
+func (f *Func) SplitInt64(name *LocalSlot) (*LocalSlot, *LocalSlot) {
+	var t *types.Type
+	if name.Type.IsSigned() {
+		t = types.Types[types.TINT32]
+	} else {
+		t = types.Types[types.TUINT32]
+	}
+	if f.Config.BigEndian {
+		return f.SplitSlot(name, ".hi", 0, t), f.SplitSlot(name, ".lo", t.Size(), types.Types[types.TUINT32])
+	}
+	return f.SplitSlot(name, ".hi", t.Size(), t), f.SplitSlot(name, ".lo", 0, types.Types[types.TUINT32])
+}
+
+func (f *Func) SplitStruct(name *LocalSlot, i int) *LocalSlot {
+	st := name.Type
+	return f.SplitSlot(name, st.FieldName(i), st.FieldOff(i), st.FieldType(i))
+}
+func (f *Func) SplitArray(name *LocalSlot) *LocalSlot {
+	n := name.N
+	at := name.Type
+	if at.NumElem() != 1 {
+		base.FatalfAt(n.Pos(), "bad array size")
+	}
+	et := at.Elem()
+	return f.SplitSlot(name, "[0]", 0, et)
+}
+
+func (f *Func) SplitSlot(name *LocalSlot, sfx string, offset int64, t *types.Type) *LocalSlot {
+	lssk := LocalSlotSplitKey{name, offset, t}
+	if als, ok := f.CanonicalLocalSplits[lssk]; ok {
+		return als
+	}
+	// Note: the _ field may appear several times.  But
+	// have no fear, identically-named but distinct Autos are
+	// ok, albeit maybe confusing for a debugger.
+	ls := f.fe.SplitSlot(name, sfx, offset, t)
+	f.CanonicalLocalSplits[lssk] = &ls
+	return &ls
+}
+
 // newValue allocates a new Value with the given fields and places it at the end of b.Values.
 func (f *Func) newValue(op Op, t *types.Type, b *Block, pos src.XPos) *Value {
 	var v *Value
diff --git a/src/cmd/compile/internal/ssa/gen/AMD64.rules b/src/cmd/compile/internal/ssa/gen/AMD64.rules
index ec91ea1513..4cd00732fc 100644
--- a/src/cmd/compile/internal/ssa/gen/AMD64.rules
+++ b/src/cmd/compile/internal/ssa/gen/AMD64.rules
@@ -2216,3 +2216,22 @@
 (MOVOstore [dstOff] {dstSym} ptr (MOVOload [srcOff] {srcSym} (SB) _) mem) && symIsRO(srcSym) =>
   (MOVQstore [dstOff+8] {dstSym} ptr (MOVQconst [int64(read64(srcSym, int64(srcOff)+8, config.ctxt.Arch.ByteOrder))])
     (MOVQstore [dstOff] {dstSym} ptr (MOVQconst [int64(read64(srcSym, int64(srcOff), config.ctxt.Arch.ByteOrder))]) mem))
+
+// Arch-specific inlining for small or disjoint runtime.memmove
+// Match post-lowering calls, memory version.
+(SelectN [0] call:(CALLstatic {sym} s1:(MOVQstoreconst _ [sc] s2:(MOVQstore _ src s3:(MOVQstore _ dst mem)))))
+	&& sc.Val64() >= 0
+	&& isSameCall(sym, "runtime.memmove")
+	&& s1.Uses == 1 && s2.Uses == 1 && s3.Uses == 1
+	&& isInlinableMemmove(dst, src, sc.Val64(), config)
+	&& clobber(s1, s2, s3, call)
+	=> (Move [sc.Val64()] dst src mem)
+
+// Match post-lowering calls, register version.
+(SelectN [0] call:(CALLstatic {sym} dst src (MOVQconst [sz]) mem))
+	&& sz >= 0
+	&& isSameCall(sym, "runtime.memmove")
+	&& call.Uses == 1
+	&& isInlinableMemmove(dst, src, sz, config)
+	&& clobber(call)
+	=> (Move [sz] dst src mem)
diff --git a/src/cmd/compile/internal/ssa/gen/ARM64.rules b/src/cmd/compile/internal/ssa/gen/ARM64.rules
index 3d2759493e..62699f290c 100644
--- a/src/cmd/compile/internal/ssa/gen/ARM64.rules
+++ b/src/cmd/compile/internal/ssa/gen/ARM64.rules
@@ -2859,3 +2859,12 @@
 (MOVHUload [off] {sym} (SB) _) && symIsRO(sym) => (MOVDconst [int64(read16(sym, int64(off), config.ctxt.Arch.ByteOrder))])
 (MOVWUload [off] {sym} (SB) _) && symIsRO(sym) => (MOVDconst [int64(read32(sym, int64(off), config.ctxt.Arch.ByteOrder))])
 (MOVDload  [off] {sym} (SB) _) && symIsRO(sym) => (MOVDconst [int64(read64(sym, int64(off), config.ctxt.Arch.ByteOrder))])
+
+// Arch-specific inlining for small or disjoint runtime.memmove
+(SelectN [0] call:(CALLstatic {sym} s1:(MOVDstore _ (MOVDconst [sz]) s2:(MOVDstore  _ src s3:(MOVDstore {t} _ dst mem)))))
+	&& sz >= 0
+	&& isSameCall(sym, "runtime.memmove")
+	&& s1.Uses == 1 && s2.Uses == 1 && s3.Uses == 1
+	&& isInlinableMemmove(dst, src, sz, config)
+	&& clobber(s1, s2, s3, call)
+	=> (Move [sz] dst src mem)
diff --git a/src/cmd/compile/internal/ssa/gen/generic.rules b/src/cmd/compile/internal/ssa/gen/generic.rules
index aad7600d79..5cbc70cf41 100644
--- a/src/cmd/compile/internal/ssa/gen/generic.rules
+++ b/src/cmd/compile/internal/ssa/gen/generic.rules
@@ -2065,7 +2065,7 @@
 (SelectN [0] call:(StaticCall {sym} s1:(Store _ (Const(64|32) [sz]) s2:(Store  _ src s3:(Store {t} _ dst mem)))))
 	&& sz >= 0
 	&& isSameCall(sym, "runtime.memmove")
-	&& t.IsPtr() // avoids TUINTPTR, see issue 30061
+	&& t.IsPtr() // avoids TUNSAFEPTR, see issue 30061
 	&& s1.Uses == 1 && s2.Uses == 1 && s3.Uses == 1
 	&& isInlinableMemmove(dst, src, int64(sz), config)
 	&& clobber(s1, s2, s3, call)
@@ -2076,7 +2076,7 @@
 	&& sz >= 0
 	&& call.Uses == 1 // this will exclude all calls with results
 	&& isSameCall(sym, "runtime.memmove")
-	&& dst.Type.IsPtr() // avoids TUINTPTR, see issue 30061
+	&& dst.Type.IsPtr() // avoids TUNSAFEPTR, see issue 30061
 	&& isInlinableMemmove(dst, src, int64(sz), config)
 	&& clobber(call)
 	=> (Move {dst.Type.Elem()} [int64(sz)] dst src mem)
@@ -2086,7 +2086,7 @@
 	&& sz >= 0
 	&& call.Uses == 1 // this will exclude all calls with results
 	&& isSameCall(sym, "runtime.memmove")
-	&& dst.Type.IsPtr() // avoids TUINTPTR, see issue 30061
+	&& dst.Type.IsPtr() // avoids TUNSAFEPTR, see issue 30061
 	&& isInlinableMemmove(dst, src, int64(sz), config)
 	&& clobber(call)
 	=> (Move {dst.Type.Elem()} [int64(sz)] dst src mem)
diff --git a/src/cmd/compile/internal/ssa/layout.go b/src/cmd/compile/internal/ssa/layout.go
index a7fd73aead..6abdb0d0c9 100644
--- a/src/cmd/compile/internal/ssa/layout.go
+++ b/src/cmd/compile/internal/ssa/layout.go
@@ -12,26 +12,10 @@ func layout(f *Func) {
 }
 
 // Register allocation may use a different order which has constraints
-// imposed by the linear-scan algorithm. Note that f.pass here is
-// regalloc, so the switch is conditional on -d=ssa/regalloc/test=N
+// imposed by the linear-scan algorithm.
 func layoutRegallocOrder(f *Func) []*Block {
-
-	switch f.pass.test {
-	case 0: // layout order
-		return layoutOrder(f)
-	case 1: // existing block order
-		return f.Blocks
-	case 2: // reverse of postorder; legal, but usually not good.
-		po := f.postorder()
-		visitOrder := make([]*Block, len(po))
-		for i, b := range po {
-			j := len(po) - i - 1
-			visitOrder[j] = b
-		}
-		return visitOrder
-	}
-
-	return nil
+	// remnant of an experiment; perhaps there will be another.
+	return layoutOrder(f)
 }
 
 func layoutOrder(f *Func) []*Block {
diff --git a/src/cmd/compile/internal/ssa/print.go b/src/cmd/compile/internal/ssa/print.go
index 36f09c3ad9..d917183c70 100644
--- a/src/cmd/compile/internal/ssa/print.go
+++ b/src/cmd/compile/internal/ssa/print.go
@@ -154,6 +154,6 @@ func fprintFunc(p funcPrinter, f *Func) {
 		p.endBlock(b)
 	}
 	for _, name := range f.Names {
-		p.named(name, f.NamedValues[name])
+		p.named(*name, f.NamedValues[*name])
 	}
 }
diff --git a/src/cmd/compile/internal/ssa/regalloc.go b/src/cmd/compile/internal/ssa/regalloc.go
index c81d5574fe..3b90b8769c 100644
--- a/src/cmd/compile/internal/ssa/regalloc.go
+++ b/src/cmd/compile/internal/ssa/regalloc.go
@@ -1882,6 +1882,10 @@ func (s *regAllocState) placeSpills() {
 		phiRegs[b.ID] = m
 	}
 
+	mustBeFirst := func(op Op) bool {
+		return op.isLoweredGetClosurePtr() || op == OpPhi || op == OpArgIntReg || op == OpArgFloatReg
+	}
+
 	// Start maps block IDs to the list of spills
 	// that go at the start of the block (but after any phis).
 	start := map[ID][]*Value{}
@@ -1971,7 +1975,7 @@ func (s *regAllocState) placeSpills() {
 		// Put the spill in the best block we found.
 		spill.Block = best
 		spill.AddArg(bestArg)
-		if best == v.Block && v.Op != OpPhi {
+		if best == v.Block && !mustBeFirst(v.Op) {
 			// Place immediately after v.
 			after[v.ID] = append(after[v.ID], spill)
 		} else {
@@ -1983,15 +1987,15 @@ func (s *regAllocState) placeSpills() {
 	// Insert spill instructions into the block schedules.
 	var oldSched []*Value
 	for _, b := range s.visitOrder {
-		nphi := 0
+		nfirst := 0
 		for _, v := range b.Values {
-			if v.Op != OpPhi {
+			if !mustBeFirst(v.Op) {
 				break
 			}
-			nphi++
+			nfirst++
 		}
-		oldSched = append(oldSched[:0], b.Values[nphi:]...)
-		b.Values = b.Values[:nphi]
+		oldSched = append(oldSched[:0], b.Values[nfirst:]...)
+		b.Values = b.Values[:nfirst]
 		b.Values = append(b.Values, start[b.ID]...)
 		for _, v := range oldSched {
 			b.Values = append(b.Values, v)
diff --git a/src/cmd/compile/internal/ssa/rewriteAMD64.go b/src/cmd/compile/internal/ssa/rewriteAMD64.go
index efb5d27145..5045ba7351 100644
--- a/src/cmd/compile/internal/ssa/rewriteAMD64.go
+++ b/src/cmd/compile/internal/ssa/rewriteAMD64.go
@@ -1038,6 +1038,8 @@ func rewriteValueAMD64(v *Value) bool {
 		return rewriteValueAMD64_OpSelect0(v)
 	case OpSelect1:
 		return rewriteValueAMD64_OpSelect1(v)
+	case OpSelectN:
+		return rewriteValueAMD64_OpSelectN(v)
 	case OpSignExt16to32:
 		v.Op = OpAMD64MOVWQSX
 		return true
@@ -32981,6 +32983,78 @@ func rewriteValueAMD64_OpSelect1(v *Value) bool {
 	}
 	return false
 }
+func rewriteValueAMD64_OpSelectN(v *Value) bool {
+	v_0 := v.Args[0]
+	b := v.Block
+	config := b.Func.Config
+	// match: (SelectN [0] call:(CALLstatic {sym} s1:(MOVQstoreconst _ [sc] s2:(MOVQstore _ src s3:(MOVQstore _ dst mem)))))
+	// cond: sc.Val64() >= 0 && isSameCall(sym, "runtime.memmove") && s1.Uses == 1 && s2.Uses == 1 && s3.Uses == 1 && isInlinableMemmove(dst, src, sc.Val64(), config) && clobber(s1, s2, s3, call)
+	// result: (Move [sc.Val64()] dst src mem)
+	for {
+		if auxIntToInt64(v.AuxInt) != 0 {
+			break
+		}
+		call := v_0
+		if call.Op != OpAMD64CALLstatic || len(call.Args) != 1 {
+			break
+		}
+		sym := auxToCall(call.Aux)
+		s1 := call.Args[0]
+		if s1.Op != OpAMD64MOVQstoreconst {
+			break
+		}
+		sc := auxIntToValAndOff(s1.AuxInt)
+		_ = s1.Args[1]
+		s2 := s1.Args[1]
+		if s2.Op != OpAMD64MOVQstore {
+			break
+		}
+		_ = s2.Args[2]
+		src := s2.Args[1]
+		s3 := s2.Args[2]
+		if s3.Op != OpAMD64MOVQstore {
+			break
+		}
+		mem := s3.Args[2]
+		dst := s3.Args[1]
+		if !(sc.Val64() >= 0 && isSameCall(sym, "runtime.memmove") && s1.Uses == 1 && s2.Uses == 1 && s3.Uses == 1 && isInlinableMemmove(dst, src, sc.Val64(), config) && clobber(s1, s2, s3, call)) {
+			break
+		}
+		v.reset(OpMove)
+		v.AuxInt = int64ToAuxInt(sc.Val64())
+		v.AddArg3(dst, src, mem)
+		return true
+	}
+	// match: (SelectN [0] call:(CALLstatic {sym} dst src (MOVQconst [sz]) mem))
+	// cond: sz >= 0 && isSameCall(sym, "runtime.memmove") && call.Uses == 1 && isInlinableMemmove(dst, src, sz, config) && clobber(call)
+	// result: (Move [sz] dst src mem)
+	for {
+		if auxIntToInt64(v.AuxInt) != 0 {
+			break
+		}
+		call := v_0
+		if call.Op != OpAMD64CALLstatic || len(call.Args) != 4 {
+			break
+		}
+		sym := auxToCall(call.Aux)
+		mem := call.Args[3]
+		dst := call.Args[0]
+		src := call.Args[1]
+		call_2 := call.Args[2]
+		if call_2.Op != OpAMD64MOVQconst {
+			break
+		}
+		sz := auxIntToInt64(call_2.AuxInt)
+		if !(sz >= 0 && isSameCall(sym, "runtime.memmove") && call.Uses == 1 && isInlinableMemmove(dst, src, sz, config) && clobber(call)) {
+			break
+		}
+		v.reset(OpMove)
+		v.AuxInt = int64ToAuxInt(sz)
+		v.AddArg3(dst, src, mem)
+		return true
+	}
+	return false
+}
 func rewriteValueAMD64_OpSlicemask(v *Value) bool {
 	v_0 := v.Args[0]
 	b := v.Block
diff --git a/src/cmd/compile/internal/ssa/rewriteARM64.go b/src/cmd/compile/internal/ssa/rewriteARM64.go
index 0ba3951df5..3cdc4d36cb 100644
--- a/src/cmd/compile/internal/ssa/rewriteARM64.go
+++ b/src/cmd/compile/internal/ssa/rewriteARM64.go
@@ -984,6 +984,8 @@ func rewriteValueARM64(v *Value) bool {
 		return rewriteValueARM64_OpSelect0(v)
 	case OpSelect1:
 		return rewriteValueARM64_OpSelect1(v)
+	case OpSelectN:
+		return rewriteValueARM64_OpSelectN(v)
 	case OpSignExt16to32:
 		v.Op = OpARM64MOVHreg
 		return true
@@ -25983,6 +25985,54 @@ func rewriteValueARM64_OpSelect1(v *Value) bool {
 	}
 	return false
 }
+func rewriteValueARM64_OpSelectN(v *Value) bool {
+	v_0 := v.Args[0]
+	b := v.Block
+	config := b.Func.Config
+	// match: (SelectN [0] call:(CALLstatic {sym} s1:(MOVDstore _ (MOVDconst [sz]) s2:(MOVDstore _ src s3:(MOVDstore {t} _ dst mem)))))
+	// cond: sz >= 0 && isSameCall(sym, "runtime.memmove") && s1.Uses == 1 && s2.Uses == 1 && s3.Uses == 1 && isInlinableMemmove(dst, src, sz, config) && clobber(s1, s2, s3, call)
+	// result: (Move [sz] dst src mem)
+	for {
+		if auxIntToInt64(v.AuxInt) != 0 {
+			break
+		}
+		call := v_0
+		if call.Op != OpARM64CALLstatic {
+			break
+		}
+		sym := auxToCall(call.Aux)
+		s1 := call.Args[0]
+		if s1.Op != OpARM64MOVDstore {
+			break
+		}
+		_ = s1.Args[2]
+		s1_1 := s1.Args[1]
+		if s1_1.Op != OpARM64MOVDconst {
+			break
+		}
+		sz := auxIntToInt64(s1_1.AuxInt)
+		s2 := s1.Args[2]
+		if s2.Op != OpARM64MOVDstore {
+			break
+		}
+		_ = s2.Args[2]
+		src := s2.Args[1]
+		s3 := s2.Args[2]
+		if s3.Op != OpARM64MOVDstore {
+			break
+		}
+		mem := s3.Args[2]
+		dst := s3.Args[1]
+		if !(sz >= 0 && isSameCall(sym, "runtime.memmove") && s1.Uses == 1 && s2.Uses == 1 && s3.Uses == 1 && isInlinableMemmove(dst, src, sz, config) && clobber(s1, s2, s3, call)) {
+			break
+		}
+		v.reset(OpMove)
+		v.AuxInt = int64ToAuxInt(sz)
+		v.AddArg3(dst, src, mem)
+		return true
+	}
+	return false
+}
 func rewriteValueARM64_OpSlicemask(v *Value) bool {
 	v_0 := v.Args[0]
 	b := v.Block
diff --git a/src/cmd/compile/internal/ssa/stackalloc.go b/src/cmd/compile/internal/ssa/stackalloc.go
index d962579122..d41f3996af 100644
--- a/src/cmd/compile/internal/ssa/stackalloc.go
+++ b/src/cmd/compile/internal/ssa/stackalloc.go
@@ -141,10 +141,11 @@ func (s *stackAllocState) stackalloc() {
 		s.names = make([]LocalSlot, n)
 	}
 	names := s.names
+	empty := LocalSlot{}
 	for _, name := range f.Names {
 		// Note: not "range f.NamedValues" above, because
 		// that would be nondeterministic.
-		for _, v := range f.NamedValues[name] {
+		for _, v := range f.NamedValues[*name] {
 			if v.Op == OpArgIntReg || v.Op == OpArgFloatReg {
 				aux := v.Aux.(*AuxNameOffset)
 				// Never let an arg be bound to a differently named thing.
@@ -162,10 +163,12 @@ func (s *stackAllocState) stackalloc() {
 				continue
 			}
 
-			if f.pass.debug > stackDebug {
-				fmt.Printf("stackalloc value %s to name %s\n", v, name)
+			if names[v.ID] == empty {
+				if f.pass.debug > stackDebug {
+					fmt.Printf("stackalloc value %s to name %s\n", v, *name)
+				}
+				names[v.ID] = *name
 			}
-			names[v.ID] = name
 		}
 	}
 
diff --git a/src/cmd/compile/internal/ssagen/ssa.go b/src/cmd/compile/internal/ssagen/ssa.go
index 2abd70169e..dfa76006de 100644
--- a/src/cmd/compile/internal/ssagen/ssa.go
+++ b/src/cmd/compile/internal/ssagen/ssa.go
@@ -8,7 +8,6 @@ import (
 	"bufio"
 	"bytes"
 	"cmd/compile/internal/abi"
-	"encoding/binary"
 	"fmt"
 	"go/constant"
 	"html"
@@ -1297,7 +1296,7 @@ func (s *state) instrumentFields(t *types.Type, addr *ssa.Value, kind instrument
 		if f.Sym.IsBlank() {
 			continue
 		}
-		offptr := s.newValue1I(ssa.OpOffPtr, types.NewPtr(f.Type), abi.FieldOffsetOf(f), addr)
+		offptr := s.newValue1I(ssa.OpOffPtr, types.NewPtr(f.Type), f.Offset, addr)
 		s.instrumentFields(f.Type, offptr, kind)
 	}
 }
@@ -3175,7 +3174,7 @@ func (s *state) expr(n ir.Node) *ssa.Value {
 		arrlen := s.constInt(types.Types[types.TINT], n.Type().Elem().NumElem())
 		cap := s.newValue1(ssa.OpSliceLen, types.Types[types.TINT], v)
 		s.boundsCheck(arrlen, cap, ssa.BoundsConvert, false)
-		return s.newValue1(ssa.OpSlicePtrUnchecked, types.Types[types.TINT], v)
+		return s.newValue1(ssa.OpSlicePtrUnchecked, n.Type(), v)
 
 	case ir.OCALLFUNC:
 		n := n.(*ir.CallExpr)
@@ -5054,19 +5053,23 @@ func (s *state) call(n *ir.CallExpr, k callKind, returnResultAddr bool) *ssa.Val
 		ft := fn.Type()
 		off := t.FieldOff(12) // TODO register args: be sure this isn't a hardcoded param stack offset.
 		args := n.Args
+		i0 := 0
 
 		// Set receiver (for interface calls). Always a pointer.
 		if rcvr != nil {
 			p := s.newValue1I(ssa.OpOffPtr, ft.Recv().Type.PtrTo(), off, addr)
 			s.store(types.Types[types.TUINTPTR], p, rcvr)
+			i0 = 1
 		}
 		// Set receiver (for method calls).
 		if n.Op() == ir.OCALLMETH {
 			base.Fatalf("OCALLMETH missed by walkCall")
 		}
 		// Set other args.
-		for _, f := range ft.Params().Fields().Slice() {
-			s.storeArgWithBase(args[0], f.Type, addr, off+abi.FieldOffsetOf(f))
+		// This code is only used when RegabiDefer is not enabled, and arguments are always
+		// passed on stack.
+		for i, f := range ft.Params().Fields().Slice() {
+			s.storeArgWithBase(args[0], f.Type, addr, off+params.InParam(i+i0).FrameOffset(params))
 			args = args[1:]
 		}
 
@@ -5079,7 +5082,6 @@ func (s *state) call(n *ir.CallExpr, k callKind, returnResultAddr bool) *ssa.Val
 		if stksize < int64(types.PtrSize) {
 			// We need room for both the call to deferprocStack and the call to
 			// the deferred function.
-			// TODO(register args) Revisit this if/when we pass args in registers.
 			stksize = int64(types.PtrSize)
 		}
 		call.AuxInt = stksize
@@ -6463,7 +6465,8 @@ func (s *state) addNamedValue(n *ir.Name, v *ssa.Value) {
 	loc := ssa.LocalSlot{N: n, Type: n.Type(), Off: 0}
 	values, ok := s.f.NamedValues[loc]
 	if !ok {
-		s.f.Names = append(s.f.Names, loc)
+		s.f.Names = append(s.f.Names, &loc)
+		s.f.CanonicalLocalSlots[loc] = &loc
 	}
 	s.f.NamedValues[loc] = append(values, v)
 }
@@ -6598,6 +6601,7 @@ func EmitArgInfo(f *ir.Func, abiInfo *abi.ABIParamResultInfo) *obj.LSym {
 	x := base.Ctxt.Lookup(fmt.Sprintf("%s.arginfo%d", f.LSym.Name, f.ABI))
 
 	PtrSize := int64(types.PtrSize)
+	uintptrTyp := types.Types[types.TUINTPTR]
 
 	isAggregate := func(t *types.Type) bool {
 		return t.IsStruct() || t.IsArray() || t.IsComplex() || t.IsInterface() || t.IsString() || t.IsSlice()
@@ -6641,12 +6645,8 @@ func EmitArgInfo(f *ir.Func, abiInfo *abi.ABIParamResultInfo) *obj.LSym {
 	n := 0
 	writebyte := func(o uint8) { wOff = objw.Uint8(x, wOff, o) }
 
-	// Write one non-aggrgate arg/field/element if there is room.
-	// Returns whether to continue.
-	write1 := func(sz, offset int64) bool {
-		if n >= limit {
-			return false
-		}
+	// Write one non-aggrgate arg/field/element.
+	write1 := func(sz, offset int64) {
 		if offset >= _special {
 			writebyte(_offsetTooLarge)
 		} else {
@@ -6654,7 +6654,6 @@ func EmitArgInfo(f *ir.Func, abiInfo *abi.ABIParamResultInfo) *obj.LSym {
 			writebyte(uint8(sz))
 		}
 		n++
-		return true
 	}
 
 	// Visit t recursively and write it out.
@@ -6662,10 +6661,12 @@ func EmitArgInfo(f *ir.Func, abiInfo *abi.ABIParamResultInfo) *obj.LSym {
 	var visitType func(baseOffset int64, t *types.Type, depth int) bool
 	visitType = func(baseOffset int64, t *types.Type, depth int) bool {
 		if n >= limit {
+			writebyte(_dotdotdot)
 			return false
 		}
 		if !isAggregate(t) {
-			return write1(t.Size(), baseOffset)
+			write1(t.Size(), baseOffset)
+			return true
 		}
 		writebyte(_startAgg)
 		depth++
@@ -6675,58 +6676,47 @@ func EmitArgInfo(f *ir.Func, abiInfo *abi.ABIParamResultInfo) *obj.LSym {
 			n++
 			return true
 		}
-		var r bool
 		switch {
 		case t.IsInterface(), t.IsString():
-			r = write1(PtrSize, baseOffset) &&
-				write1(PtrSize, baseOffset+PtrSize)
+			_ = visitType(baseOffset, uintptrTyp, depth) &&
+				visitType(baseOffset+PtrSize, uintptrTyp, depth)
 		case t.IsSlice():
-			r = write1(PtrSize, baseOffset) &&
-				write1(PtrSize, baseOffset+PtrSize) &&
-				write1(PtrSize, baseOffset+PtrSize*2)
+			_ = visitType(baseOffset, uintptrTyp, depth) &&
+				visitType(baseOffset+PtrSize, uintptrTyp, depth) &&
+				visitType(baseOffset+PtrSize*2, uintptrTyp, depth)
 		case t.IsComplex():
-			r = write1(t.Size()/2, baseOffset) &&
-				write1(t.Size()/2, baseOffset+t.Size()/2)
+			_ = visitType(baseOffset, types.FloatForComplex(t), depth) &&
+				visitType(baseOffset+t.Size()/2, types.FloatForComplex(t), depth)
 		case t.IsArray():
-			r = true
 			if t.NumElem() == 0 {
 				n++ // {} counts as a component
 				break
 			}
 			for i := int64(0); i < t.NumElem(); i++ {
 				if !visitType(baseOffset, t.Elem(), depth) {
-					r = false
 					break
 				}
 				baseOffset += t.Elem().Size()
 			}
 		case t.IsStruct():
-			r = true
 			if t.NumFields() == 0 {
 				n++ // {} counts as a component
 				break
 			}
 			for _, field := range t.Fields().Slice() {
 				if !visitType(baseOffset+field.Offset, field.Type, depth) {
-					r = false
 					break
 				}
 			}
 		}
-		if !r {
-			writebyte(_dotdotdot)
-		}
 		writebyte(_endAgg)
-		return r
+		return true
 	}
 
-	c := true
 	for _, a := range abiInfo.InParams() {
-		if !c {
-			writebyte(_dotdotdot)
+		if !visitType(a.FrameOffset(abiInfo), a.Type, 0) {
 			break
 		}
-		c = visitType(a.FrameOffset(abiInfo), a.Type, 0)
 	}
 	writebyte(_endSeq)
 	if wOff > maxLen {
@@ -7552,82 +7542,6 @@ func (e *ssafn) Auto(pos src.XPos, t *types.Type) *ir.Name {
 	return typecheck.TempAt(pos, e.curfn, t) // Note: adds new auto to e.curfn.Func.Dcl list
 }
 
-func (e *ssafn) SplitString(name ssa.LocalSlot) (ssa.LocalSlot, ssa.LocalSlot) {
-	ptrType := types.NewPtr(types.Types[types.TUINT8])
-	lenType := types.Types[types.TINT]
-	// Split this string up into two separate variables.
-	p := e.SplitSlot(&name, ".ptr", 0, ptrType)
-	l := e.SplitSlot(&name, ".len", ptrType.Size(), lenType)
-	return p, l
-}
-
-func (e *ssafn) SplitInterface(name ssa.LocalSlot) (ssa.LocalSlot, ssa.LocalSlot) {
-	n := name.N
-	u := types.Types[types.TUINTPTR]
-	t := types.NewPtr(types.Types[types.TUINT8])
-	// Split this interface up into two separate variables.
-	f := ".itab"
-	if n.Type().IsEmptyInterface() {
-		f = ".type"
-	}
-	c := e.SplitSlot(&name, f, 0, u) // see comment in typebits.Set
-	d := e.SplitSlot(&name, ".data", u.Size(), t)
-	return c, d
-}
-
-func (e *ssafn) SplitSlice(name ssa.LocalSlot) (ssa.LocalSlot, ssa.LocalSlot, ssa.LocalSlot) {
-	ptrType := types.NewPtr(name.Type.Elem())
-	lenType := types.Types[types.TINT]
-	p := e.SplitSlot(&name, ".ptr", 0, ptrType)
-	l := e.SplitSlot(&name, ".len", ptrType.Size(), lenType)
-	c := e.SplitSlot(&name, ".cap", ptrType.Size()+lenType.Size(), lenType)
-	return p, l, c
-}
-
-func (e *ssafn) SplitComplex(name ssa.LocalSlot) (ssa.LocalSlot, ssa.LocalSlot) {
-	s := name.Type.Size() / 2
-	var t *types.Type
-	if s == 8 {
-		t = types.Types[types.TFLOAT64]
-	} else {
-		t = types.Types[types.TFLOAT32]
-	}
-	r := e.SplitSlot(&name, ".real", 0, t)
-	i := e.SplitSlot(&name, ".imag", t.Size(), t)
-	return r, i
-}
-
-func (e *ssafn) SplitInt64(name ssa.LocalSlot) (ssa.LocalSlot, ssa.LocalSlot) {
-	var t *types.Type
-	if name.Type.IsSigned() {
-		t = types.Types[types.TINT32]
-	} else {
-		t = types.Types[types.TUINT32]
-	}
-	if Arch.LinkArch.ByteOrder == binary.BigEndian {
-		return e.SplitSlot(&name, ".hi", 0, t), e.SplitSlot(&name, ".lo", t.Size(), types.Types[types.TUINT32])
-	}
-	return e.SplitSlot(&name, ".hi", t.Size(), t), e.SplitSlot(&name, ".lo", 0, types.Types[types.TUINT32])
-}
-
-func (e *ssafn) SplitStruct(name ssa.LocalSlot, i int) ssa.LocalSlot {
-	st := name.Type
-	// Note: the _ field may appear several times.  But
-	// have no fear, identically-named but distinct Autos are
-	// ok, albeit maybe confusing for a debugger.
-	return e.SplitSlot(&name, "."+st.FieldName(i), st.FieldOff(i), st.FieldType(i))
-}
-
-func (e *ssafn) SplitArray(name ssa.LocalSlot) ssa.LocalSlot {
-	n := name.N
-	at := name.Type
-	if at.NumElem() != 1 {
-		e.Fatalf(n.Pos(), "bad array size")
-	}
-	et := at.Elem()
-	return e.SplitSlot(&name, "[0]", 0, et)
-}
-
 func (e *ssafn) DerefItab(it *obj.LSym, offset int64) *obj.LSym {
 	return reflectdata.ITabSym(it, offset)
 }
diff --git a/src/cmd/compile/internal/test/align_test.go b/src/cmd/compile/internal/test/align_test.go
new file mode 100644
index 0000000000..32afc92973
--- /dev/null
+++ b/src/cmd/compile/internal/test/align_test.go
@@ -0,0 +1,96 @@
+// Copyright 2021 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Test to make sure that equality functions (and hash
+// functions) don't do unaligned reads on architectures
+// that can't do unaligned reads. See issue 46283.
+
+package test
+
+import "testing"
+
+type T1 struct {
+	x          float32
+	a, b, c, d int16 // memequal64
+}
+type T2 struct {
+	x          float32
+	a, b, c, d int32 // memequal128
+}
+
+type A2 [2]byte // eq uses a 2-byte load
+type A4 [4]byte // eq uses a 4-byte load
+type A8 [8]byte // eq uses an 8-byte load
+
+//go:noinline
+func cmpT1(p, q *T1) {
+	if *p != *q {
+		panic("comparison test wrong")
+	}
+}
+
+//go:noinline
+func cmpT2(p, q *T2) {
+	if *p != *q {
+		panic("comparison test wrong")
+	}
+}
+
+//go:noinline
+func cmpA2(p, q *A2) {
+	if *p != *q {
+		panic("comparison test wrong")
+	}
+}
+
+//go:noinline
+func cmpA4(p, q *A4) {
+	if *p != *q {
+		panic("comparison test wrong")
+	}
+}
+
+//go:noinline
+func cmpA8(p, q *A8) {
+	if *p != *q {
+		panic("comparison test wrong")
+	}
+}
+
+func TestAlignEqual(t *testing.T) {
+	cmpT1(&T1{}, &T1{})
+	cmpT2(&T2{}, &T2{})
+
+	m1 := map[T1]bool{}
+	m1[T1{}] = true
+	m1[T1{}] = false
+	if len(m1) != 1 {
+		t.Fatalf("len(m1)=%d, want 1", len(m1))
+	}
+	m2 := map[T2]bool{}
+	m2[T2{}] = true
+	m2[T2{}] = false
+	if len(m2) != 1 {
+		t.Fatalf("len(m2)=%d, want 1", len(m2))
+	}
+
+	type X2 struct {
+		y byte
+		z A2
+	}
+	var x2 X2
+	cmpA2(&x2.z, &A2{})
+	type X4 struct {
+		y byte
+		z A4
+	}
+	var x4 X4
+	cmpA4(&x4.z, &A4{})
+	type X8 struct {
+		y byte
+		z A8
+	}
+	var x8 X8
+	cmpA8(&x8.z, &A8{})
+}
diff --git a/src/cmd/compile/internal/typecheck/builtin.go b/src/cmd/compile/internal/typecheck/builtin.go
index 67a894c7ed..833b17b414 100644
--- a/src/cmd/compile/internal/typecheck/builtin.go
+++ b/src/cmd/compile/internal/typecheck/builtin.go
@@ -138,6 +138,7 @@ var runtimeDecls = [...]struct {
 	{"growslice", funcTag, 116},
 	{"unsafeslice", funcTag, 117},
 	{"unsafeslice64", funcTag, 118},
+	{"unsafeslicecheckptr", funcTag, 118},
 	{"memmove", funcTag, 119},
 	{"memclrNoHeapPointers", funcTag, 120},
 	{"memclrHasPointers", funcTag, 120},
@@ -341,8 +342,8 @@ func runtimeTypes() []*types.Type {
 	typs[114] = newSig(params(typs[1], typs[15], typs[15], typs[7]), params(typs[7]))
 	typs[115] = types.NewSlice(typs[2])
 	typs[116] = newSig(params(typs[1], typs[115], typs[15]), params(typs[115]))
-	typs[117] = newSig(params(typs[1], typs[15]), nil)
-	typs[118] = newSig(params(typs[1], typs[22]), nil)
+	typs[117] = newSig(params(typs[1], typs[7], typs[15]), nil)
+	typs[118] = newSig(params(typs[1], typs[7], typs[22]), nil)
 	typs[119] = newSig(params(typs[3], typs[3], typs[5]), nil)
 	typs[120] = newSig(params(typs[7], typs[5]), nil)
 	typs[121] = newSig(params(typs[3], typs[3], typs[5]), params(typs[6]))
diff --git a/src/cmd/compile/internal/typecheck/builtin/runtime.go b/src/cmd/compile/internal/typecheck/builtin/runtime.go
index ebeaeae79e..2b29ea3c08 100644
--- a/src/cmd/compile/internal/typecheck/builtin/runtime.go
+++ b/src/cmd/compile/internal/typecheck/builtin/runtime.go
@@ -183,8 +183,9 @@ func makeslice(typ *byte, len int, cap int) unsafe.Pointer
 func makeslice64(typ *byte, len int64, cap int64) unsafe.Pointer
 func makeslicecopy(typ *byte, tolen int, fromlen int, from unsafe.Pointer) unsafe.Pointer
 func growslice(typ *byte, old []any, cap int) (ary []any)
-func unsafeslice(typ *byte, len int)
-func unsafeslice64(typ *byte, len int64)
+func unsafeslice(typ *byte, ptr unsafe.Pointer, len int)
+func unsafeslice64(typ *byte, ptr unsafe.Pointer, len int64)
+func unsafeslicecheckptr(typ *byte, ptr unsafe.Pointer, len int64)
 
 func memmove(to *any, frm *any, length uintptr)
 func memclrNoHeapPointers(ptr unsafe.Pointer, n uintptr)
diff --git a/src/cmd/compile/internal/typecheck/const.go b/src/cmd/compile/internal/typecheck/const.go
index 5a35eeade9..761b043794 100644
--- a/src/cmd/compile/internal/typecheck/const.go
+++ b/src/cmd/compile/internal/typecheck/const.go
@@ -633,6 +633,17 @@ func defaultlit2(l ir.Node, r ir.Node, force bool) (ir.Node, ir.Node) {
 	if l.Type() == nil || r.Type() == nil {
 		return l, r
 	}
+
+	if !l.Type().IsInterface() && !r.Type().IsInterface() {
+		// Can't mix bool with non-bool, string with non-string.
+		if l.Type().IsBoolean() != r.Type().IsBoolean() {
+			return l, r
+		}
+		if l.Type().IsString() != r.Type().IsString() {
+			return l, r
+		}
+	}
+
 	if !l.Type().IsUntyped() {
 		r = convlit(r, l.Type())
 		return l, r
@@ -647,17 +658,10 @@ func defaultlit2(l ir.Node, r ir.Node, force bool) (ir.Node, ir.Node) {
 		return l, r
 	}
 
-	// Can't mix bool with non-bool, string with non-string, or nil with anything (untyped).
-	if l.Type().IsBoolean() != r.Type().IsBoolean() {
-		return l, r
-	}
-	if l.Type().IsString() != r.Type().IsString() {
-		return l, r
-	}
+	// Can't mix nil with anything untyped.
 	if ir.IsNil(l) || ir.IsNil(r) {
 		return l, r
 	}
-
 	t := defaultType(mixUntyped(l.Type(), r.Type()))
 	l = convlit(l, t)
 	r = convlit(r, t)
diff --git a/src/cmd/compile/internal/typecheck/dcl.go b/src/cmd/compile/internal/typecheck/dcl.go
index f3058d8811..5b771e3c0b 100644
--- a/src/cmd/compile/internal/typecheck/dcl.go
+++ b/src/cmd/compile/internal/typecheck/dcl.go
@@ -106,7 +106,17 @@ func Export(n *ir.Name) {
 // Redeclared emits a diagnostic about symbol s being redeclared at pos.
 func Redeclared(pos src.XPos, s *types.Sym, where string) {
 	if !s.Lastlineno.IsKnown() {
-		pkgName := DotImportRefs[s.Def.(*ir.Ident)]
+		var pkgName *ir.PkgName
+		if s.Def == nil {
+			for id, pkg := range DotImportRefs {
+				if id.Sym().Name == s.Name {
+					pkgName = pkg
+					break
+				}
+			}
+		} else {
+			pkgName = DotImportRefs[s.Def.(*ir.Ident)]
+		}
 		base.ErrorfAt(pos, "%v redeclared %s\n"+
 			"\t%v: previous declaration during import %q", s, where, base.FmtPos(pkgName.Pos()), pkgName.Pkg.Path)
 	} else {
diff --git a/src/cmd/compile/internal/typecheck/func.go b/src/cmd/compile/internal/typecheck/func.go
index f381e1dbdc..fbcc784627 100644
--- a/src/cmd/compile/internal/typecheck/func.go
+++ b/src/cmd/compile/internal/typecheck/func.go
@@ -981,6 +981,12 @@ func tcRecover(n *ir.CallExpr) ir.Node {
 
 // tcUnsafeAdd typechecks an OUNSAFEADD node.
 func tcUnsafeAdd(n *ir.BinaryExpr) *ir.BinaryExpr {
+	if !types.AllowsGoVersion(curpkg(), 1, 17) {
+		base.ErrorfVers("go1.17", "unsafe.Add")
+		n.SetType(nil)
+		return n
+	}
+
 	n.X = AssignConv(Expr(n.X), types.Types[types.TUNSAFEPTR], "argument to unsafe.Add")
 	n.Y = DefaultLit(Expr(n.Y), types.Types[types.TINT])
 	if n.X.Type() == nil || n.Y.Type() == nil {
@@ -997,6 +1003,12 @@ func tcUnsafeAdd(n *ir.BinaryExpr) *ir.BinaryExpr {
 
 // tcUnsafeSlice typechecks an OUNSAFESLICE node.
 func tcUnsafeSlice(n *ir.BinaryExpr) *ir.BinaryExpr {
+	if !types.AllowsGoVersion(curpkg(), 1, 17) {
+		base.ErrorfVers("go1.17", "unsafe.Slice")
+		n.SetType(nil)
+		return n
+	}
+
 	n.X = Expr(n.X)
 	n.Y = Expr(n.Y)
 	if n.X.Type() == nil || n.Y.Type() == nil {
@@ -1006,7 +1018,14 @@ func tcUnsafeSlice(n *ir.BinaryExpr) *ir.BinaryExpr {
 	t := n.X.Type()
 	if !t.IsPtr() {
 		base.Errorf("first argument to unsafe.Slice must be pointer; have %L", t)
+	} else if t.Elem().NotInHeap() {
+		// TODO(mdempsky): This can be relaxed, but should only affect the
+		// Go runtime itself. End users should only see //go:notinheap
+		// types due to incomplete C structs in cgo, and those types don't
+		// have a meaningful size anyway.
+		base.Errorf("unsafe.Slice of incomplete (or unallocatable) type not allowed")
 	}
+
 	if !checkunsafeslice(&n.Y) {
 		n.SetType(nil)
 		return n
diff --git a/src/cmd/compile/internal/typecheck/iimport.go b/src/cmd/compile/internal/typecheck/iimport.go
index a5ddbb5a74..37f5a7bba0 100644
--- a/src/cmd/compile/internal/typecheck/iimport.go
+++ b/src/cmd/compile/internal/typecheck/iimport.go
@@ -1540,7 +1540,7 @@ func (r *importReader) exprsOrNil() (a, b ir.Node) {
 func builtinCall(pos src.XPos, op ir.Op) *ir.CallExpr {
 	if go117ExportTypes {
 		// These should all be encoded as direct ops, not OCALL.
-		base.Fatalf("builtinCall should not be invoked when types are included in inport/export")
+		base.Fatalf("builtinCall should not be invoked when types are included in import/export")
 	}
 	return ir.NewCallExpr(pos, ir.OCALL, ir.NewIdent(base.Pos, types.BuiltinPkg.Lookup(ir.OpNames[op])), nil)
 }
diff --git a/src/cmd/compile/internal/typecheck/stmt.go b/src/cmd/compile/internal/typecheck/stmt.go
index 175216f279..922a01bfbe 100644
--- a/src/cmd/compile/internal/typecheck/stmt.go
+++ b/src/cmd/compile/internal/typecheck/stmt.go
@@ -204,8 +204,20 @@ assignOK:
 		r.Use = ir.CallUseList
 		rtyp := r.Type()
 
+		mismatched := false
+		failed := false
 		for i := range lhs {
-			assignType(i, rtyp.Field(i).Type)
+			result := rtyp.Field(i).Type
+			assignType(i, result)
+
+			if lhs[i].Type() == nil || result == nil {
+				failed = true
+			} else if lhs[i] != ir.BlankNode && !types.Identical(lhs[i].Type(), result) {
+				mismatched = true
+			}
+		}
+		if mismatched && !failed {
+			rewriteMultiValueCall(stmt, r)
 		}
 		return
 	}
diff --git a/src/cmd/compile/internal/typecheck/typecheck.go b/src/cmd/compile/internal/typecheck/typecheck.go
index 95f7b50259..359f662369 100644
--- a/src/cmd/compile/internal/typecheck/typecheck.go
+++ b/src/cmd/compile/internal/typecheck/typecheck.go
@@ -945,16 +945,18 @@ func typecheckargs(n ir.InitNode) {
 		return
 	}
 
-	// Rewrite f(g()) into t1, t2, ... = g(); f(t1, t2, ...).
-
 	// Save n as n.Orig for fmt.go.
 	if ir.Orig(n) == n {
 		n.(ir.OrigNode).SetOrig(ir.SepCopy(n))
 	}
 
-	as := ir.NewAssignListStmt(base.Pos, ir.OAS2, nil, nil)
-	as.Rhs.Append(list...)
+	// Rewrite f(g()) into t1, t2, ... = g(); f(t1, t2, ...).
+	rewriteMultiValueCall(n, list[0])
+}
 
+// rewriteMultiValueCall rewrites multi-valued f() to use temporaries,
+// so the backend wouldn't need to worry about tuple-valued expressions.
+func rewriteMultiValueCall(n ir.InitNode, call ir.Node) {
 	// If we're outside of function context, then this call will
 	// be executed during the generated init function. However,
 	// init.go hasn't yet created it. Instead, associate the
@@ -964,25 +966,40 @@ func typecheckargs(n ir.InitNode) {
 	if static {
 		ir.CurFunc = InitTodoFunc
 	}
-	list = nil
-	for _, f := range t.FieldSlice() {
-		t := Temp(f.Type)
-		as.PtrInit().Append(ir.NewDecl(base.Pos, ir.ODCL, t))
-		as.Lhs.Append(t)
-		list = append(list, t)
+
+	as := ir.NewAssignListStmt(base.Pos, ir.OAS2, nil, []ir.Node{call})
+	results := call.Type().FieldSlice()
+	list := make([]ir.Node, len(results))
+	for i, result := range results {
+		tmp := Temp(result.Type)
+		as.PtrInit().Append(ir.NewDecl(base.Pos, ir.ODCL, tmp))
+		as.Lhs.Append(tmp)
+		list[i] = tmp
 	}
 	if static {
 		ir.CurFunc = nil
 	}
 
+	n.PtrInit().Append(Stmt(as))
+
 	switch n := n.(type) {
+	default:
+		base.Fatalf("rewriteMultiValueCall %+v", n.Op())
 	case *ir.CallExpr:
 		n.Args = list
 	case *ir.ReturnStmt:
 		n.Results = list
+	case *ir.AssignListStmt:
+		if n.Op() != ir.OAS2FUNC {
+			base.Fatalf("rewriteMultiValueCall: invalid op %v", n.Op())
+		}
+		as.SetOp(ir.OAS2FUNC)
+		n.SetOp(ir.OAS2)
+		n.Rhs = make([]ir.Node, len(list))
+		for i, tmp := range list {
+			n.Rhs[i] = AssignConv(tmp, n.Lhs[i].Type(), "assignment")
+		}
 	}
-
-	n.PtrInit().Append(Stmt(as))
 }
 
 func checksliceindex(l ir.Node, r ir.Node, tp *types.Type) bool {
@@ -1443,15 +1460,22 @@ toomany:
 }
 
 func errorDetails(nl ir.Nodes, tstruct *types.Type, isddd bool) string {
-	// If we don't know any type at a call site, let's suppress any return
-	// message signatures. See Issue https://golang.org/issues/19012.
+	// Suppress any return message signatures if:
+	//
+	// (1) We don't know any type at a call site (see #19012).
+	// (2) Any node has an unknown type.
+	// (3) Invalid type for variadic parameter (see #46957).
 	if tstruct == nil {
-		return ""
+		return "" // case 1
 	}
-	// If any node has an unknown type, suppress it as well
+
+	if isddd && !nl[len(nl)-1].Type().IsSlice() {
+		return "" // case 3
+	}
+
 	for _, n := range nl {
 		if n.Type() == nil {
-			return ""
+			return "" // case 2
 		}
 	}
 	return fmt.Sprintf("\n\thave %s\n\twant %v", fmtSignature(nl, isddd), tstruct)
diff --git a/src/cmd/compile/internal/types/fmt.go b/src/cmd/compile/internal/types/fmt.go
index b538ea8054..8b988952a7 100644
--- a/src/cmd/compile/internal/types/fmt.go
+++ b/src/cmd/compile/internal/types/fmt.go
@@ -109,14 +109,18 @@ func sconv(s *Sym, verb rune, mode fmtMode) string {
 		return ""
 	}
 
-	if s.Name == "_" {
-		return "_"
+	q := pkgqual(s.Pkg, verb, mode)
+	if q == "" {
+		return s.Name
 	}
+
 	buf := fmtBufferPool.Get().(*bytes.Buffer)
 	buf.Reset()
 	defer fmtBufferPool.Put(buf)
 
-	symfmt(buf, s, verb, mode)
+	buf.WriteString(q)
+	buf.WriteByte('.')
+	buf.WriteString(s.Name)
 	return InternString(buf.Bytes())
 }
 
@@ -128,56 +132,49 @@ func sconv2(b *bytes.Buffer, s *Sym, verb rune, mode fmtMode) {
 		b.WriteString("")
 		return
 	}
-	if s.Name == "_" {
-		b.WriteString("_")
-		return
-	}
 
 	symfmt(b, s, verb, mode)
 }
 
 func symfmt(b *bytes.Buffer, s *Sym, verb rune, mode fmtMode) {
+	if q := pkgqual(s.Pkg, verb, mode); q != "" {
+		b.WriteString(q)
+		b.WriteByte('.')
+	}
+	b.WriteString(s.Name)
+}
+
+// pkgqual returns the qualifier that should be used for printing
+// symbols from the given package in the given mode.
+// If it returns the empty string, no qualification is needed.
+func pkgqual(pkg *Pkg, verb rune, mode fmtMode) string {
 	if verb != 'S' {
 		switch mode {
 		case fmtGo: // This is for the user
-			if s.Pkg == BuiltinPkg || s.Pkg == LocalPkg {
-				b.WriteString(s.Name)
-				return
+			if pkg == BuiltinPkg || pkg == LocalPkg {
+				return ""
 			}
 
 			// If the name was used by multiple packages, display the full path,
-			if s.Pkg.Name != "" && NumImport[s.Pkg.Name] > 1 {
-				fmt.Fprintf(b, "%q.%s", s.Pkg.Path, s.Name)
-				return
+			if pkg.Name != "" && NumImport[pkg.Name] > 1 {
+				return strconv.Quote(pkg.Path)
 			}
-			b.WriteString(s.Pkg.Name)
-			b.WriteByte('.')
-			b.WriteString(s.Name)
-			return
+			return pkg.Name
 
 		case fmtDebug:
-			b.WriteString(s.Pkg.Name)
-			b.WriteByte('.')
-			b.WriteString(s.Name)
-			return
+			return pkg.Name
 
 		case fmtTypeIDName:
 			// dcommontype, typehash
-			b.WriteString(s.Pkg.Name)
-			b.WriteByte('.')
-			b.WriteString(s.Name)
-			return
+			return pkg.Name
 
 		case fmtTypeID:
 			// (methodsym), typesym, weaksym
-			b.WriteString(s.Pkg.Prefix)
-			b.WriteByte('.')
-			b.WriteString(s.Name)
-			return
+			return pkg.Prefix
 		}
 	}
 
-	b.WriteString(s.Name)
+	return ""
 }
 
 // Type
diff --git a/src/cmd/compile/internal/types2/builtins.go b/src/cmd/compile/internal/types2/builtins.go
index b9e178dd57..f90e06f226 100644
--- a/src/cmd/compile/internal/types2/builtins.go
+++ b/src/cmd/compile/internal/types2/builtins.go
@@ -579,6 +579,11 @@ func (check *Checker) builtin(x *operand, call *syntax.CallExpr, id builtinId) (
 
 	case _Add:
 		// unsafe.Add(ptr unsafe.Pointer, len IntegerType) unsafe.Pointer
+		if !check.allowVersion(check.pkg, 1, 17) {
+			check.error(call.Fun, "unsafe.Add requires go1.17 or later")
+			return
+		}
+
 		check.assignment(x, Typ[UnsafePointer], "argument to unsafe.Add")
 		if x.mode == invalid {
 			return
@@ -675,6 +680,11 @@ func (check *Checker) builtin(x *operand, call *syntax.CallExpr, id builtinId) (
 
 	case _Slice:
 		// unsafe.Slice(ptr *T, len IntegerType) []T
+		if !check.allowVersion(check.pkg, 1, 17) {
+			check.error(call.Fun, "unsafe.Slice requires go1.17 or later")
+			return
+		}
+
 		typ := asPointer(x.typ)
 		if typ == nil {
 			check.errorf(x, invalidArg+"%s is not a pointer", x)
diff --git a/src/cmd/compile/internal/walk/builtin.go b/src/cmd/compile/internal/walk/builtin.go
index 62eb4298f4..14efc05e32 100644
--- a/src/cmd/compile/internal/walk/builtin.go
+++ b/src/cmd/compile/internal/walk/builtin.go
@@ -489,7 +489,7 @@ func walkNew(n *ir.UnaryExpr, init *ir.Nodes) ir.Node {
 		base.Errorf("%v can't be allocated in Go; it is incomplete (or unallocatable)", n.Type().Elem())
 	}
 	if n.Esc() == ir.EscNone {
-		if t.Size() >= ir.MaxImplicitStackVarSize {
+		if t.Size() > ir.MaxImplicitStackVarSize {
 			base.Fatalf("large ONEW with EscNone: %v", n)
 		}
 		return stackTempAddr(init, t)
@@ -654,36 +654,28 @@ func walkRecover(nn *ir.CallExpr, init *ir.Nodes) ir.Node {
 }
 
 func walkUnsafeSlice(n *ir.BinaryExpr, init *ir.Nodes) ir.Node {
+	ptr := safeExpr(n.X, init)
 	len := safeExpr(n.Y, init)
 
 	fnname := "unsafeslice64"
-	argtype := types.Types[types.TINT64]
+	lenType := types.Types[types.TINT64]
 
 	// Type checking guarantees that TIDEAL len/cap are positive and fit in an int.
 	// The case of len or cap overflow when converting TUINT or TUINTPTR to TINT
 	// will be handled by the negative range checks in unsafeslice during runtime.
-	if len.Type().IsKind(types.TIDEAL) || len.Type().Size() <= types.Types[types.TUINT].Size() {
+	if ir.ShouldCheckPtr(ir.CurFunc, 1) {
+		fnname = "unsafeslicecheckptr"
+		// for simplicity, unsafeslicecheckptr always uses int64
+	} else if len.Type().IsKind(types.TIDEAL) || len.Type().Size() <= types.Types[types.TUINT].Size() {
 		fnname = "unsafeslice"
-		argtype = types.Types[types.TINT]
+		lenType = types.Types[types.TINT]
 	}
 
 	t := n.Type()
 
-	// Call runtime.unsafeslice[64] to check that the length argument is
-	// non-negative and smaller than the max length allowed for the
-	// element type.
+	// Call runtime.unsafeslice{,64,checkptr} to check ptr and len.
 	fn := typecheck.LookupRuntime(fnname)
-	init.Append(mkcall1(fn, nil, init, reflectdata.TypePtr(t.Elem()), typecheck.Conv(len, argtype)))
-
-	ptr := walkExpr(n.X, init)
-
-	c := ir.NewUnaryExpr(n.Pos(), ir.OCHECKNIL, ptr)
-	c.SetTypecheck(1)
-	init.Append(c)
-
-	// TODO(mdempsky): checkptr instrumentation. Maybe merge into length
-	// check above, along with nil check? Need to be careful about
-	// notinheap pointers though: can't pass them as unsafe.Pointer.
+	init.Append(mkcall1(fn, nil, init, reflectdata.TypePtr(t.Elem()), typecheck.Conv(ptr, types.Types[types.TUNSAFEPTR]), typecheck.Conv(len, lenType)))
 
 	h := ir.NewSliceHeaderExpr(n.Pos(), t,
 		typecheck.Conv(ptr, types.Types[types.TUNSAFEPTR]),
diff --git a/src/cmd/compile/internal/walk/walk.go b/src/cmd/compile/internal/walk/walk.go
index fe2c62cd4f..26da6e3145 100644
--- a/src/cmd/compile/internal/walk/walk.go
+++ b/src/cmd/compile/internal/walk/walk.go
@@ -313,7 +313,7 @@ func mayCall(n ir.Node) bool {
 			return true
 
 		case ir.OINDEX, ir.OSLICE, ir.OSLICEARR, ir.OSLICE3, ir.OSLICE3ARR, ir.OSLICESTR,
-			ir.ODEREF, ir.ODOTPTR, ir.ODOTTYPE, ir.ODIV, ir.OMOD:
+			ir.ODEREF, ir.ODOTPTR, ir.ODOTTYPE, ir.ODIV, ir.OMOD, ir.OSLICE2ARRPTR:
 			// These ops might panic, make sure they are done
 			// before we start marshaling args for a call. See issue 16760.
 			return true
diff --git a/src/cmd/dist/build.go b/src/cmd/dist/build.go
index 00e23ef179..1abb03bcc5 100644
--- a/src/cmd/dist/build.go
+++ b/src/cmd/dist/build.go
@@ -1607,6 +1607,18 @@ var incomplete = map[string]bool{
 	"linux/sparc64": true,
 }
 
+// List of platforms which are first class ports. See golang.org/issue/38874.
+var firstClass = map[string]bool{
+	"darwin/amd64":  true,
+	"darwin/arm64":  true,
+	"linux/386":     true,
+	"linux/amd64":   true,
+	"linux/arm":     true,
+	"linux/arm64":   true,
+	"windows/386":   true,
+	"windows/amd64": true,
+}
+
 func needCC() bool {
 	switch os.Getenv("CGO_ENABLED") {
 	case "1":
@@ -1743,6 +1755,7 @@ func cmdlist() {
 		GOOS         string
 		GOARCH       string
 		CgoSupported bool
+		FirstClass   bool
 	}
 	var results []jsonResult
 	for _, p := range plats {
@@ -1750,7 +1763,8 @@ func cmdlist() {
 		results = append(results, jsonResult{
 			GOOS:         fields[0],
 			GOARCH:       fields[1],
-			CgoSupported: cgoEnabled[p]})
+			CgoSupported: cgoEnabled[p],
+			FirstClass:   firstClass[p]})
 	}
 	out, err := json.MarshalIndent(results, "", "\t")
 	if err != nil {
diff --git a/src/cmd/dist/test.go b/src/cmd/dist/test.go
index 50bf80ba59..f40fa926df 100644
--- a/src/cmd/dist/test.go
+++ b/src/cmd/dist/test.go
@@ -722,14 +722,29 @@ func (t *tester) registerTests() {
 				},
 			})
 			if t.hasCxx() {
-				t.tests = append(t.tests, distTest{
-					name:    "swig_callback",
-					heading: "../misc/swig/callback",
-					fn: func(dt *distTest) error {
-						t.addCmd(dt, "misc/swig/callback", t.goTest())
-						return nil
+				t.tests = append(t.tests,
+					distTest{
+						name:    "swig_callback",
+						heading: "../misc/swig/callback",
+						fn: func(dt *distTest) error {
+							t.addCmd(dt, "misc/swig/callback", t.goTest())
+							return nil
+						},
 					},
-				})
+					distTest{
+						name:    "swig_callback_lto",
+						heading: "../misc/swig/callback",
+						fn: func(dt *distTest) error {
+							cmd := t.addCmd(dt, "misc/swig/callback", t.goTest())
+							cmd.Env = append(os.Environ(),
+								"CGO_CFLAGS=-flto -Wno-lto-type-mismatch -Wno-unknown-warning-option",
+								"CGO_CXXFLAGS=-flto -Wno-lto-type-mismatch -Wno-unknown-warning-option",
+								"CGO_LDFLAGS=-flto -Wno-lto-type-mismatch -Wno-unknown-warning-option",
+							)
+							return nil
+						},
+					},
+				)
 			}
 		}
 	}
@@ -766,7 +781,7 @@ func (t *tester) registerTests() {
 			t.registerTest("testasan", "../misc/cgo/testasan", "go", "run", ".")
 		}
 		if goos == "linux" && goarch != "ppc64le" {
-			// because syscall.SysProcAttri struct used in misc/cgo/testsanitizers is only built on linux.
+			// because syscall.SysProcAttr struct used in misc/cgo/testsanitizers is only built on linux.
 			// Some inconsistent failures happen on ppc64le so disable for now.
 			t.registerHostTest("testsanitizers", "../misc/cgo/testsanitizers", "misc/cgo/testsanitizers", ".")
 		}
@@ -1042,7 +1057,7 @@ func (t *tester) supportedBuildmode(mode string) bool {
 			"darwin-amd64", "darwin-arm64",
 			"freebsd-amd64",
 			"android-arm", "android-arm64", "android-386",
-			"windows-amd64", "windows-386":
+			"windows-amd64", "windows-386", "windows-arm64":
 			return true
 		}
 		return false
diff --git a/src/cmd/dist/vfp_arm.s b/src/cmd/dist/vfp_arm.s
index d571f8b82a..525ee9b366 100644
--- a/src/cmd/dist/vfp_arm.s
+++ b/src/cmd/dist/vfp_arm.s
@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build gc,arm
+//go:build gc
+// +build gc
 
 #include "textflag.h"
 
diff --git a/src/cmd/dist/vfp_default.s b/src/cmd/dist/vfp_default.s
index 84829beeff..0c1e16b0aa 100644
--- a/src/cmd/dist/vfp_default.s
+++ b/src/cmd/dist/vfp_default.s
@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build !arm,gc
+//go:build gc && !arm
+// +build gc,!arm
 
 #include "textflag.h"
 
diff --git a/src/cmd/go.mod b/src/cmd/go.mod
index a15cbe070a..cd03968eed 100644
--- a/src/cmd/go.mod
+++ b/src/cmd/go.mod
@@ -3,13 +3,13 @@ module cmd
 go 1.17
 
 require (
-	github.com/google/pprof v0.0.0-20210226084205-cbba55b83ad5
+	github.com/google/pprof v0.0.0-20210506205249-923b5ab0fc1a
 	github.com/ianlancetaylor/demangle v0.0.0-20200824232613-28f6c0f3b639 // indirect
 	golang.org/x/arch v0.0.0-20210502124803-cbf565b21d1e
 	golang.org/x/crypto v0.0.0-20210503195802-e9a32991a82e // indirect
-	golang.org/x/mod v0.4.3-0.20210504181020-67f1c1edc27a
-	golang.org/x/sys v0.0.0-20210503173754-0981d6026fa6 // indirect
+	golang.org/x/mod v0.4.3-0.20210608190319-0f08993efd8a
+	golang.org/x/sys v0.0.0-20210511113859-b0526f3d8744 // indirect
 	golang.org/x/term v0.0.0-20210503060354-a79de5458b56
-	golang.org/x/tools v0.1.1-0.20210505014545-7cab0ef2e9a5
+	golang.org/x/tools v0.1.2-0.20210519160823-49064d2332f9
 	golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 // indirect
 )
diff --git a/src/cmd/go.sum b/src/cmd/go.sum
index 8a7ad4290a..d728acaec9 100644
--- a/src/cmd/go.sum
+++ b/src/cmd/go.sum
@@ -1,22 +1,45 @@
 github.com/chzyer/logex v1.1.10/go.mod h1:+Ywpsq7O8HXn0nuIou7OrIPyXbp3wmkHB+jjWRnGsAI=
 github.com/chzyer/readline v0.0.0-20180603132655-2972be24d48e/go.mod h1:nSuG5e5PlCu98SY8svDHJxuZscDgtXS6KTTbou5AhLI=
 github.com/chzyer/test v0.0.0-20180213035817-a1ea475d72b1/go.mod h1:Q3SI9o4m/ZMnBNeIyt5eFwwo7qiLfzFZmjNmxjkiQlU=
-github.com/google/pprof v0.0.0-20210226084205-cbba55b83ad5 h1:zIaiqGYDQwa4HVx5wGRTXbx38Pqxjemn4BP98wpzpXo=
-github.com/google/pprof v0.0.0-20210226084205-cbba55b83ad5/go.mod h1:kpwsk12EmLew5upagYY7GY0pfYCcupk39gWOCRROcvE=
+github.com/google/pprof v0.0.0-20210506205249-923b5ab0fc1a h1:jmAp/2PZAScNd62lTD3Mcb0Ey9FvIIJtLohPhtxZJ+Q=
+github.com/google/pprof v0.0.0-20210506205249-923b5ab0fc1a/go.mod h1:kpwsk12EmLew5upagYY7GY0pfYCcupk39gWOCRROcvE=
 github.com/ianlancetaylor/demangle v0.0.0-20200824232613-28f6c0f3b639 h1:mV02weKRL81bEnm8A0HT1/CAelMQDBuQIfLw8n+d6xI=
 github.com/ianlancetaylor/demangle v0.0.0-20200824232613-28f6c0f3b639/go.mod h1:aSSvb/t6k1mPoxDqO4vJh6VOCGPwU4O0C2/Eqndh1Sc=
+github.com/yuin/goldmark v1.3.5/go.mod h1:mwnBkeHKe2W/ZEtQ+71ViKU8L12m81fl3OWwC1Zlc8k=
 golang.org/x/arch v0.0.0-20210502124803-cbf565b21d1e h1:pv3V0NlNSh5Q6AX/StwGLBjcLS7UN4m4Gq+V+uSecqM=
 golang.org/x/arch v0.0.0-20210502124803-cbf565b21d1e/go.mod h1:5om86z9Hs0C8fWVUuoMHwpExlXzs5Tkyp9hOrfG7pp8=
+golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
+golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
 golang.org/x/crypto v0.0.0-20210503195802-e9a32991a82e h1:8foAy0aoO5GkqCvAEJ4VC4P3zksTg4X4aJCDpZzmgQI=
 golang.org/x/crypto v0.0.0-20210503195802-e9a32991a82e/go.mod h1:P+XmwS30IXTQdn5tA2iutPOUgjI07+tq3H3K9MVA1s8=
-golang.org/x/mod v0.4.3-0.20210504181020-67f1c1edc27a h1:wbpC/7Wbo5WFVox32n+KjhRRLmTLq8YW/wRlL2iVAhk=
-golang.org/x/mod v0.4.3-0.20210504181020-67f1c1edc27a/go.mod h1:5OXOZSfqPIIbmVBIIKWRFfZjPR0E5r58TLhUjH0a2Ro=
+golang.org/x/mod v0.4.2/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
+golang.org/x/mod v0.4.3-0.20210608190319-0f08993efd8a h1:e8qnjKz4EE6OjRki9wTadWSIogINvq10sMcuBRORxMY=
+golang.org/x/mod v0.4.3-0.20210608190319-0f08993efd8a/go.mod h1:5OXOZSfqPIIbmVBIIKWRFfZjPR0E5r58TLhUjH0a2Ro=
+golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
+golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
+golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
+golang.org/x/net v0.0.0-20210405180319-a5a99cb37ef4/go.mod h1:p54w0d4576C0XHj96bSt6lcn1PtDYWL6XObtHCRCNQM=
+golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.0.0-20210220032951-036812b2e83c/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20191204072324-ce4227a45e2e/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20210503173754-0981d6026fa6 h1:cdsMqa2nXzqlgs183pHxtvoVwU7CyzaCTAUOg94af4c=
-golang.org/x/sys v0.0.0-20210503173754-0981d6026fa6/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210330210617-4fbd30eecc44/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210510120138-977fb7262007/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20210511113859-b0526f3d8744 h1:yhBbb4IRs2HS9PPlAg6DMC6mUOKexJBNsLf4Z+6En1Q=
+golang.org/x/sys v0.0.0-20210511113859-b0526f3d8744/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/term v0.0.0-20210503060354-a79de5458b56 h1:b8jxX3zqjpqb2LklXPzKSGJhzyxCOZSz8ncv8Nv+y7w=
 golang.org/x/term v0.0.0-20210503060354-a79de5458b56/go.mod h1:tfny5GFUkzUvx4ps4ajbZsCe5lw1metzhBm9T3x7oIY=
-golang.org/x/tools v0.1.1-0.20210505014545-7cab0ef2e9a5 h1:ImcI7RFHWLu2QWpFDXaReu0j+sQAHIy65vUFZImXiqY=
-golang.org/x/tools v0.1.1-0.20210505014545-7cab0ef2e9a5/go.mod h1:sH/Eidr0EddymY8HZSakBo32zU3fG5ovDq874hJLjVg=
+golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
+golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
+golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
+golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
+golang.org/x/tools v0.1.2-0.20210519160823-49064d2332f9 h1:2XlR/j4I4xz5GQZI7zBjqTfezYyRIE2jD5IMousB2rg=
+golang.org/x/tools v0.1.2-0.20210519160823-49064d2332f9/go.mod h1:o0xws9oXOQQZyjljx8fwUC0k7L1pTE6eaCbjGeHmOkk=
+golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 h1:go1bK/D/BFZV2I8cIQd1NKEZ+0owSTG1fDTci4IqFcE=
 golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+rsc.io/pdf v0.1.1/go.mod h1:n8OzWcQ6Sp37PL01nO98y4iUCRdTGarVfzxY20ICaU4=
diff --git a/src/cmd/go/alldocs.go b/src/cmd/go/alldocs.go
index 052b61c03d..7f88d3216c 100644
--- a/src/cmd/go/alldocs.go
+++ b/src/cmd/go/alldocs.go
@@ -174,8 +174,8 @@
 // 		a build will run as if the disk file path exists with the contents
 // 		given by the backing file paths, or as if the disk file path does not
 // 		exist if its backing file path is empty. Support for the -overlay flag
-// 		has some limitations:importantly, cgo files included from outside the
-// 		include path must be  in the same directory as the Go package they are
+// 		has some limitations: importantly, cgo files included from outside the
+// 		include path must be in the same directory as the Go package they are
 // 		included from, and overlays will not appear when binaries and tests are
 // 		run through go run and go test respectively.
 // 	-pkgdir dir
@@ -293,7 +293,7 @@
 //
 // Usage:
 //
-// 	go doc [-u] [-c] [package|[package.]symbol[.methodOrField]]
+// 	go doc [doc flags] [package|[package.]symbol[.methodOrField]]
 //
 // Doc prints the documentation comments associated with the item identified by its
 // arguments (a package, const, func, type, var, method, or struct field)
@@ -1078,7 +1078,7 @@
 //
 // Usage:
 //
-// 	go mod edit [editing flags] [go.mod]
+// 	go mod edit [editing flags] [-fmt|-print|-json] [go.mod]
 //
 // Edit provides a command-line interface for editing go.mod,
 // for use primarily by tools or scripts. It reads only go.mod;
@@ -1186,13 +1186,17 @@
 //
 // Usage:
 //
-// 	go mod graph
+// 	go mod graph [-go=version]
 //
 // Graph prints the module requirement graph (with replacements applied)
 // in text form. Each line in the output has two space-separated fields: a module
 // and one of its requirements. Each module is identified as a string of the form
 // path@version, except for the main module, which has no @version suffix.
 //
+// The -go flag causes graph to report the module graph as loaded by the
+// given Go version, instead of the version indicated by the 'go' directive
+// in the go.mod file.
+//
 // See https://golang.org/ref/mod#go-mod-graph for more about 'go mod graph'.
 //
 //
@@ -1200,7 +1204,7 @@
 //
 // Usage:
 //
-// 	go mod init [module]
+// 	go mod init [module-path]
 //
 // Init initializes and writes a new go.mod file in the current directory, in
 // effect creating a new module rooted at the current directory. The go.mod file
@@ -1221,7 +1225,7 @@
 //
 // Usage:
 //
-// 	go mod tidy [-e] [-v] [-go=version]
+// 	go mod tidy [-e] [-v] [-go=version] [-compat=version]
 //
 // Tidy makes sure go.mod matches the source code in the module.
 // It adds any missing modules necessary to build the current module's
@@ -1241,6 +1245,14 @@
 // (Go versions 1.17 and higher retain more requirements in order to
 // support lazy module loading.)
 //
+// The -compat flag preserves any additional checksums needed for the
+// 'go' command from the indicated major Go release to successfully load
+// the module graph, and causes tidy to error out if that version of the
+// 'go' command would load any imported package from a different module
+// version. By default, tidy acts as if the -compat flag were set to the
+// version prior to the one indicated by the 'go' directive in the go.mod
+// file.
+//
 // See https://golang.org/ref/mod#go-mod-tidy for more about 'go mod tidy'.
 //
 //
@@ -1560,7 +1572,7 @@
 //
 // A build constraint, also known as a build tag, is a line comment that begins
 //
-// 	// +build
+// 	//go:build
 //
 // that lists the conditions under which a file should be included in the package.
 // Constraints may appear in any kind of source file (not just Go), but
@@ -1568,30 +1580,20 @@
 // only by blank lines and other line comments. These rules mean that in Go
 // files a build constraint must appear before the package clause.
 //
-// To distinguish build constraints from package documentation, a series of
-// build constraints must be followed by a blank line.
+// To distinguish build constraints from package documentation,
+// a build constraint should be followed by a blank line.
 //
-// A build constraint is evaluated as the OR of space-separated options.
-// Each option evaluates as the AND of its comma-separated terms.
-// Each term consists of letters, digits, underscores, and dots.
-// A term may be negated with a preceding !.
-// For example, the build constraint:
+// A build constraint is evaluated as an expression containing options
+// combined by ||, &&, and ! operators and parentheses. Operators have
+// the same meaning as in Go.
 //
-// 	// +build linux,386 darwin,!cgo
+// For example, the following build constraint constrains a file to
+// build when the "linux" and "386" constraints are satisfied, or when
+// "darwin" is satisfied and "cgo" is not:
 //
-// corresponds to the boolean formula:
+// 	//go:build (linux && 386) || (darwin && !cgo)
 //
-// 	(linux AND 386) OR (darwin AND (NOT cgo))
-//
-// A file may have multiple build constraints. The overall constraint is the AND
-// of the individual constraints. That is, the build constraints:
-//
-// 	// +build linux darwin
-// 	// +build amd64
-//
-// corresponds to the boolean formula:
-//
-// 	(linux OR darwin) AND amd64
+// It is an error for a file to have more than one //go:build line.
 //
 // During a particular build, the following words are satisfied:
 //
@@ -1629,24 +1631,28 @@
 //
 // To keep a file from being considered for the build:
 //
-// 	// +build ignore
+// 	//go:build ignore
 //
 // (any other unsatisfied word will work as well, but "ignore" is conventional.)
 //
 // To build a file only when using cgo, and only on Linux and OS X:
 //
-// 	// +build linux,cgo darwin,cgo
+// 	//go:build cgo && (linux || darwin)
 //
 // Such a file is usually paired with another file implementing the
 // default functionality for other systems, which in this case would
 // carry the constraint:
 //
-// 	// +build !linux,!darwin !cgo
+// 	//go:build !(cgo && (linux || darwin))
 //
 // Naming a file dns_windows.go will cause it to be included only when
 // building the package for Windows; similarly, math_386.s will be included
 // only when building the package for 32-bit x86.
 //
+// Go versions 1.16 and earlier used a different syntax for build constraints,
+// with a "// +build" prefix. The gofmt command will add an equivalent //go:build
+// constraint when encountering the older syntax.
+//
 //
 // Build modes
 //
@@ -1885,6 +1891,9 @@
 // 	GOMIPS64
 // 		For GOARCH=mips64{,le}, whether to use floating point instructions.
 // 		Valid values are hardfloat (default), softfloat.
+// 	GOPPC64
+// 		For GOARCH=ppc64{,le}, the target ISA (Instruction Set Architecture).
+// 		Valid values are power8 (default), power9.
 // 	GOWASM
 // 		For GOARCH=wasm, comma-separated list of experimental WebAssembly features to use.
 // 		Valid values are satconv, signext.
@@ -1894,6 +1903,12 @@
 // 	GCCGOTOOLDIR
 // 		If set, where to find gccgo tools, such as cgo.
 // 		The default is based on how gccgo was configured.
+// 	GOEXPERIMENT
+// 		Comma-separated list of toolchain experiments to enable or disable.
+// 		The list of available experiments may change arbitrarily over time.
+// 		See src/internal/goexperiment/flags.go for currently valid values.
+// 		Warning: This variable is provided for the development and testing
+// 		of the Go toolchain itself. Use beyond that purpose is unsupported.
 // 	GOROOT_FINAL
 // 		The root of the installed Go tree, when it is
 // 		installed in a location other than where it is built.
diff --git a/src/cmd/go/go_test.go b/src/cmd/go/go_test.go
index 52b11fbb20..5e2833f08e 100644
--- a/src/cmd/go/go_test.go
+++ b/src/cmd/go/go_test.go
@@ -72,7 +72,6 @@ func tooSlow(t *testing.T) {
 // (temp) directory.
 var testGOROOT string
 
-var testCC string
 var testGOCACHE string
 
 var testGo string
@@ -179,13 +178,6 @@ func TestMain(m *testing.M) {
 			os.Exit(2)
 		}
 
-		out, err = exec.Command(gotool, "env", "CC").CombinedOutput()
-		if err != nil {
-			fmt.Fprintf(os.Stderr, "could not find testing CC: %v\n%s", err, out)
-			os.Exit(2)
-		}
-		testCC = strings.TrimSpace(string(out))
-
 		cmd := exec.Command(testGo, "env", "CGO_ENABLED")
 		cmd.Stderr = new(strings.Builder)
 		if out, err := cmd.Output(); err != nil {
@@ -2193,7 +2185,7 @@ func testBuildmodePIE(t *testing.T, useCgo, setBuildmodeToPIE bool) {
 			// See https://sourceware.org/bugzilla/show_bug.cgi?id=19011
 			section := f.Section(".edata")
 			if section == nil {
-				t.Fatalf(".edata section is not present")
+				t.Skip(".edata section is not present")
 			}
 			// TODO: deduplicate this struct from cmd/link/internal/ld/pe.go
 			type IMAGE_EXPORT_DIRECTORY struct {
@@ -2864,3 +2856,35 @@ func TestExecInDeletedDir(t *testing.T) {
 	// `go version` should not fail
 	tg.run("version")
 }
+
+// A missing C compiler should not force the net package to be stale.
+// Issue 47215.
+func TestMissingCC(t *testing.T) {
+	if !canCgo {
+		t.Skip("test is only meaningful on systems with cgo")
+	}
+	cc := os.Getenv("CC")
+	if cc == "" {
+		cc = "gcc"
+	}
+	if filepath.IsAbs(cc) {
+		t.Skipf(`"CC" (%s) is an absolute path`, cc)
+	}
+	_, err := exec.LookPath(cc)
+	if err != nil {
+		t.Skipf(`"CC" (%s) not on PATH`, cc)
+	}
+
+	tg := testgo(t)
+	defer tg.cleanup()
+	netStale, _ := tg.isStale("net")
+	if netStale {
+		t.Skip(`skipping test because "net" package is currently stale`)
+	}
+
+	tg.setenv("PATH", "") // No C compiler on PATH.
+	netStale, _ = tg.isStale("net")
+	if netStale {
+		t.Error(`clearing "PATH" causes "net" to be stale`)
+	}
+}
diff --git a/src/cmd/go/internal/cfg/cfg.go b/src/cmd/go/internal/cfg/cfg.go
index b47eb812b5..57a3c1ff6f 100644
--- a/src/cmd/go/internal/cfg/cfg.go
+++ b/src/cmd/go/internal/cfg/cfg.go
@@ -77,6 +77,14 @@ func defaultContext() build.Context {
 	ctxt.GOOS = envOr("GOOS", ctxt.GOOS)
 	ctxt.GOARCH = envOr("GOARCH", ctxt.GOARCH)
 
+	// The experiments flags are based on GOARCH, so they may
+	// need to change.  TODO: This should be cleaned up.
+	buildcfg.UpdateExperiments(ctxt.GOOS, ctxt.GOARCH, envOr("GOEXPERIMENT", buildcfg.DefaultGOEXPERIMENT))
+	ctxt.ToolTags = nil
+	for _, exp := range buildcfg.EnabledExperiments() {
+		ctxt.ToolTags = append(ctxt.ToolTags, "goexperiment."+exp)
+	}
+
 	// The go/build rule for whether cgo is enabled is:
 	//	1. If $CGO_ENABLED is set, respect it.
 	//	2. Otherwise, if this is a cross-compile, disable cgo.
diff --git a/src/cmd/go/internal/doc/doc.go b/src/cmd/go/internal/doc/doc.go
index 67f76e2256..8580a5dc4d 100644
--- a/src/cmd/go/internal/doc/doc.go
+++ b/src/cmd/go/internal/doc/doc.go
@@ -13,7 +13,7 @@ import (
 
 var CmdDoc = &base.Command{
 	Run:         runDoc,
-	UsageLine:   "go doc [-u] [-c] [package|[package.]symbol[.methodOrField]]",
+	UsageLine:   "go doc [doc flags] [package|[package.]symbol[.methodOrField]]",
 	CustomFlags: true,
 	Short:       "show documentation for package or symbol",
 	Long: `
diff --git a/src/cmd/go/internal/envcmd/env.go b/src/cmd/go/internal/envcmd/env.go
index b30c37ab27..1553d26391 100644
--- a/src/cmd/go/internal/envcmd/env.go
+++ b/src/cmd/go/internal/envcmd/env.go
@@ -10,6 +10,7 @@ import (
 	"encoding/json"
 	"fmt"
 	"go/build"
+	"internal/buildcfg"
 	"io"
 	"os"
 	"path/filepath"
@@ -72,6 +73,7 @@ func MkEnv() []cfg.EnvVar {
 		{Name: "GOCACHE", Value: cache.DefaultDir()},
 		{Name: "GOENV", Value: envFile},
 		{Name: "GOEXE", Value: cfg.ExeSuffix},
+		{Name: "GOEXPERIMENT", Value: buildcfg.GOEXPERIMENT()},
 		{Name: "GOFLAGS", Value: cfg.Getenv("GOFLAGS")},
 		{Name: "GOHOSTARCH", Value: runtime.GOARCH},
 		{Name: "GOHOSTOS", Value: runtime.GOOS},
@@ -197,6 +199,21 @@ func runEnv(ctx context.Context, cmd *base.Command, args []string) {
 	if *envU && *envW {
 		base.Fatalf("go env: cannot use -u with -w")
 	}
+
+	// Handle 'go env -w' and 'go env -u' before calling buildcfg.Check,
+	// so they can be used to recover from an invalid configuration.
+	if *envW {
+		runEnvW(args)
+		return
+	}
+
+	if *envU {
+		runEnvU(args)
+		return
+	}
+
+	buildcfg.Check()
+
 	env := cfg.CmdEnv
 	env = append(env, ExtraEnvVars()...)
 
@@ -206,14 +223,7 @@ func runEnv(ctx context.Context, cmd *base.Command, args []string) {
 
 	// Do we need to call ExtraEnvVarsCostly, which is a bit expensive?
 	needCostly := false
-	if *envU || *envW {
-		// We're overwriting or removing default settings,
-		// so it doesn't really matter what the existing settings are.
-		//
-		// Moreover, we haven't validated the new settings yet, so it is
-		// important that we NOT perform any actions based on them,
-		// such as initializing the builder to compute other variables.
-	} else if len(args) == 0 {
+	if len(args) == 0 {
 		// We're listing all environment variables ("go env"),
 		// including the expensive ones.
 		needCostly = true
@@ -238,95 +248,6 @@ func runEnv(ctx context.Context, cmd *base.Command, args []string) {
 		env = append(env, ExtraEnvVarsCostly()...)
 	}
 
-	if *envW {
-		// Process and sanity-check command line.
-		if len(args) == 0 {
-			base.Fatalf("go env -w: no KEY=VALUE arguments given")
-		}
-		osEnv := make(map[string]string)
-		for _, e := range cfg.OrigEnv {
-			if i := strings.Index(e, "="); i >= 0 {
-				osEnv[e[:i]] = e[i+1:]
-			}
-		}
-		add := make(map[string]string)
-		for _, arg := range args {
-			i := strings.Index(arg, "=")
-			if i < 0 {
-				base.Fatalf("go env -w: arguments must be KEY=VALUE: invalid argument: %s", arg)
-			}
-			key, val := arg[:i], arg[i+1:]
-			if err := checkEnvWrite(key, val); err != nil {
-				base.Fatalf("go env -w: %v", err)
-			}
-			if _, ok := add[key]; ok {
-				base.Fatalf("go env -w: multiple values for key: %s", key)
-			}
-			add[key] = val
-			if osVal := osEnv[key]; osVal != "" && osVal != val {
-				fmt.Fprintf(os.Stderr, "warning: go env -w %s=... does not override conflicting OS environment variable\n", key)
-			}
-		}
-
-		goos, okGOOS := add["GOOS"]
-		goarch, okGOARCH := add["GOARCH"]
-		if okGOOS || okGOARCH {
-			if !okGOOS {
-				goos = cfg.Goos
-			}
-			if !okGOARCH {
-				goarch = cfg.Goarch
-			}
-			if err := work.CheckGOOSARCHPair(goos, goarch); err != nil {
-				base.Fatalf("go env -w: %v", err)
-			}
-		}
-
-		gotmp, okGOTMP := add["GOTMPDIR"]
-		if okGOTMP {
-			if !filepath.IsAbs(gotmp) && gotmp != "" {
-				base.Fatalf("go env -w: GOTMPDIR must be an absolute path")
-			}
-		}
-
-		updateEnvFile(add, nil)
-		return
-	}
-
-	if *envU {
-		// Process and sanity-check command line.
-		if len(args) == 0 {
-			base.Fatalf("go env -u: no arguments given")
-		}
-		del := make(map[string]bool)
-		for _, arg := range args {
-			if err := checkEnvWrite(arg, ""); err != nil {
-				base.Fatalf("go env -u: %v", err)
-			}
-			del[arg] = true
-		}
-		if del["GOOS"] || del["GOARCH"] {
-			goos, goarch := cfg.Goos, cfg.Goarch
-			if del["GOOS"] {
-				goos = getOrigEnv("GOOS")
-				if goos == "" {
-					goos = build.Default.GOOS
-				}
-			}
-			if del["GOARCH"] {
-				goarch = getOrigEnv("GOARCH")
-				if goarch == "" {
-					goarch = build.Default.GOARCH
-				}
-			}
-			if err := work.CheckGOOSARCHPair(goos, goarch); err != nil {
-				base.Fatalf("go env -u: %v", err)
-			}
-		}
-		updateEnvFile(nil, del)
-		return
-	}
-
 	if len(args) > 0 {
 		if *envJson {
 			var es []cfg.EnvVar
@@ -351,6 +272,109 @@ func runEnv(ctx context.Context, cmd *base.Command, args []string) {
 	PrintEnv(os.Stdout, env)
 }
 
+func runEnvW(args []string) {
+	// Process and sanity-check command line.
+	if len(args) == 0 {
+		base.Fatalf("go env -w: no KEY=VALUE arguments given")
+	}
+	osEnv := make(map[string]string)
+	for _, e := range cfg.OrigEnv {
+		if i := strings.Index(e, "="); i >= 0 {
+			osEnv[e[:i]] = e[i+1:]
+		}
+	}
+	add := make(map[string]string)
+	for _, arg := range args {
+		i := strings.Index(arg, "=")
+		if i < 0 {
+			base.Fatalf("go env -w: arguments must be KEY=VALUE: invalid argument: %s", arg)
+		}
+		key, val := arg[:i], arg[i+1:]
+		if err := checkEnvWrite(key, val); err != nil {
+			base.Fatalf("go env -w: %v", err)
+		}
+		if _, ok := add[key]; ok {
+			base.Fatalf("go env -w: multiple values for key: %s", key)
+		}
+		add[key] = val
+		if osVal := osEnv[key]; osVal != "" && osVal != val {
+			fmt.Fprintf(os.Stderr, "warning: go env -w %s=... does not override conflicting OS environment variable\n", key)
+		}
+	}
+
+	if err := checkBuildConfig(add, nil); err != nil {
+		base.Fatalf("go env -w: %v", err)
+	}
+
+	gotmp, okGOTMP := add["GOTMPDIR"]
+	if okGOTMP {
+		if !filepath.IsAbs(gotmp) && gotmp != "" {
+			base.Fatalf("go env -w: GOTMPDIR must be an absolute path")
+		}
+	}
+
+	updateEnvFile(add, nil)
+}
+
+func runEnvU(args []string) {
+	// Process and sanity-check command line.
+	if len(args) == 0 {
+		base.Fatalf("go env -u: no arguments given")
+	}
+	del := make(map[string]bool)
+	for _, arg := range args {
+		if err := checkEnvWrite(arg, ""); err != nil {
+			base.Fatalf("go env -u: %v", err)
+		}
+		del[arg] = true
+	}
+
+	if err := checkBuildConfig(nil, del); err != nil {
+		base.Fatalf("go env -u: %v", err)
+	}
+
+	updateEnvFile(nil, del)
+}
+
+// checkBuildConfig checks whether the build configuration is valid
+// after the specified configuration environment changes are applied.
+func checkBuildConfig(add map[string]string, del map[string]bool) error {
+	// get returns the value for key after applying add and del and
+	// reports whether it changed. cur should be the current value
+	// (i.e., before applying changes) and def should be the default
+	// value (i.e., when no environment variables are provided at all).
+	get := func(key, cur, def string) (string, bool) {
+		if val, ok := add[key]; ok {
+			return val, true
+		}
+		if del[key] {
+			val := getOrigEnv(key)
+			if val == "" {
+				val = def
+			}
+			return val, true
+		}
+		return cur, false
+	}
+
+	goos, okGOOS := get("GOOS", cfg.Goos, build.Default.GOOS)
+	goarch, okGOARCH := get("GOARCH", cfg.Goarch, build.Default.GOARCH)
+	if okGOOS || okGOARCH {
+		if err := work.CheckGOOSARCHPair(goos, goarch); err != nil {
+			return err
+		}
+	}
+
+	goexperiment, okGOEXPERIMENT := get("GOEXPERIMENT", buildcfg.GOEXPERIMENT(), "")
+	if okGOEXPERIMENT {
+		if _, _, err := buildcfg.ParseGOEXPERIMENT(goos, goarch, goexperiment); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
 // PrintEnv prints the environment variables to w.
 func PrintEnv(w io.Writer, env []cfg.EnvVar) {
 	for _, e := range env {
diff --git a/src/cmd/go/internal/help/helpdoc.go b/src/cmd/go/internal/help/helpdoc.go
index 2f86e4195d..490ff1fb7c 100644
--- a/src/cmd/go/internal/help/helpdoc.go
+++ b/src/cmd/go/internal/help/helpdoc.go
@@ -598,6 +598,9 @@ Architecture-specific environment variables:
 	GOMIPS64
 		For GOARCH=mips64{,le}, whether to use floating point instructions.
 		Valid values are hardfloat (default), softfloat.
+	GOPPC64
+		For GOARCH=ppc64{,le}, the target ISA (Instruction Set Architecture).
+		Valid values are power8 (default), power9.
 	GOWASM
 		For GOARCH=wasm, comma-separated list of experimental WebAssembly features to use.
 		Valid values are satconv, signext.
@@ -607,6 +610,12 @@ Special-purpose environment variables:
 	GCCGOTOOLDIR
 		If set, where to find gccgo tools, such as cgo.
 		The default is based on how gccgo was configured.
+	GOEXPERIMENT
+		Comma-separated list of toolchain experiments to enable or disable.
+		The list of available experiments may change arbitrarily over time.
+		See src/internal/goexperiment/flags.go for currently valid values.
+		Warning: This variable is provided for the development and testing
+		of the Go toolchain itself. Use beyond that purpose is unsupported.
 	GOROOT_FINAL
 		The root of the installed Go tree, when it is
 		installed in a location other than where it is built.
@@ -784,7 +793,7 @@ var HelpBuildConstraint = &base.Command{
 	Long: `
 A build constraint, also known as a build tag, is a line comment that begins
 
-	// +build
+	//go:build
 
 that lists the conditions under which a file should be included in the package.
 Constraints may appear in any kind of source file (not just Go), but
@@ -792,30 +801,20 @@ they must appear near the top of the file, preceded
 only by blank lines and other line comments. These rules mean that in Go
 files a build constraint must appear before the package clause.
 
-To distinguish build constraints from package documentation, a series of
-build constraints must be followed by a blank line.
+To distinguish build constraints from package documentation,
+a build constraint should be followed by a blank line.
 
-A build constraint is evaluated as the OR of space-separated options.
-Each option evaluates as the AND of its comma-separated terms.
-Each term consists of letters, digits, underscores, and dots.
-A term may be negated with a preceding !.
-For example, the build constraint:
+A build constraint is evaluated as an expression containing options
+combined by ||, &&, and ! operators and parentheses. Operators have
+the same meaning as in Go.
 
-	// +build linux,386 darwin,!cgo
+For example, the following build constraint constrains a file to
+build when the "linux" and "386" constraints are satisfied, or when
+"darwin" is satisfied and "cgo" is not:
 
-corresponds to the boolean formula:
+	//go:build (linux && 386) || (darwin && !cgo)
 
-	(linux AND 386) OR (darwin AND (NOT cgo))
-
-A file may have multiple build constraints. The overall constraint is the AND
-of the individual constraints. That is, the build constraints:
-
-	// +build linux darwin
-	// +build amd64
-
-corresponds to the boolean formula:
-
-	(linux OR darwin) AND amd64
+It is an error for a file to have more than one //go:build line.
 
 During a particular build, the following words are satisfied:
 
@@ -853,22 +852,26 @@ in addition to ios tags and files.
 
 To keep a file from being considered for the build:
 
-	// +build ignore
+	//go:build ignore
 
 (any other unsatisfied word will work as well, but "ignore" is conventional.)
 
 To build a file only when using cgo, and only on Linux and OS X:
 
-	// +build linux,cgo darwin,cgo
+	//go:build cgo && (linux || darwin)
 
 Such a file is usually paired with another file implementing the
 default functionality for other systems, which in this case would
 carry the constraint:
 
-	// +build !linux,!darwin !cgo
+	//go:build !(cgo && (linux || darwin))
 
 Naming a file dns_windows.go will cause it to be included only when
 building the package for Windows; similarly, math_386.s will be included
 only when building the package for 32-bit x86.
+
+Go versions 1.16 and earlier used a different syntax for build constraints,
+with a "// +build" prefix. The gofmt command will add an equivalent //go:build
+constraint when encountering the older syntax.
 `,
 }
diff --git a/src/cmd/go/internal/imports/read.go b/src/cmd/go/internal/imports/read.go
index 5e270781d7..70d5190450 100644
--- a/src/cmd/go/internal/imports/read.go
+++ b/src/cmd/go/internal/imports/read.go
@@ -8,6 +8,7 @@ package imports
 
 import (
 	"bufio"
+	"bytes"
 	"errors"
 	"io"
 	"unicode/utf8"
@@ -22,6 +23,19 @@ type importReader struct {
 	nerr int
 }
 
+var bom = []byte{0xef, 0xbb, 0xbf}
+
+func newImportReader(b *bufio.Reader) *importReader {
+	// Remove leading UTF-8 BOM.
+	// Per https://golang.org/ref/spec#Source_code_representation:
+	// a compiler may ignore a UTF-8-encoded byte order mark (U+FEFF)
+	// if it is the first Unicode code point in the source text.
+	if leadingBytes, err := b.Peek(3); err == nil && bytes.Equal(leadingBytes, bom) {
+		b.Discard(3)
+	}
+	return &importReader{b: b}
+}
+
 func isIdent(c byte) bool {
 	return 'A' <= c && c <= 'Z' || 'a' <= c && c <= 'z' || '0' <= c && c <= '9' || c == '_' || c >= utf8.RuneSelf
 }
@@ -201,7 +215,7 @@ func (r *importReader) readImport(imports *[]string) {
 // ReadComments is like io.ReadAll, except that it only reads the leading
 // block of comments in the file.
 func ReadComments(f io.Reader) ([]byte, error) {
-	r := &importReader{b: bufio.NewReader(f)}
+	r := newImportReader(bufio.NewReader(f))
 	r.peekByte(true)
 	if r.err == nil && !r.eof {
 		// Didn't reach EOF, so must have found a non-space byte. Remove it.
@@ -213,7 +227,7 @@ func ReadComments(f io.Reader) ([]byte, error) {
 // ReadImports is like io.ReadAll, except that it expects a Go file as input
 // and stops reading the input once the imports have completed.
 func ReadImports(f io.Reader, reportSyntaxError bool, imports *[]string) ([]byte, error) {
-	r := &importReader{b: bufio.NewReader(f)}
+	r := newImportReader(bufio.NewReader(f))
 
 	r.readKeyword("package")
 	r.readIdent()
diff --git a/src/cmd/go/internal/imports/read_test.go b/src/cmd/go/internal/imports/read_test.go
index 6ea356f1ff..6a1a6524a1 100644
--- a/src/cmd/go/internal/imports/read_test.go
+++ b/src/cmd/go/internal/imports/read_test.go
@@ -66,6 +66,10 @@ var readImportsTests = []readTest{
 		`,
 		"",
 	},
+	{
+		"\ufeff𝔻" + `package p; import "x";ℙvar x = 1`,
+		"",
+	},
 }
 
 var readCommentsTests = []readTest{
@@ -81,6 +85,10 @@ var readCommentsTests = []readTest{
 		`ℙpackage p; import . "x"`,
 		"",
 	},
+	{
+		"\ufeff𝔻" + `ℙpackage p; import . "x"`,
+		"",
+	},
 	{
 		`// foo
 
@@ -90,6 +98,19 @@ var readCommentsTests = []readTest{
 		
 		/*/ zot */
 
+		// asdf
+		ℙHello, world`,
+		"",
+	},
+	{
+		"\ufeff𝔻" + `// foo
+
+		/* bar */
+
+		/* quux */ // baz
+
+		/*/ zot */
+
 		// asdf
 		ℙHello, world`,
 		"",
@@ -107,6 +128,11 @@ func testRead(t *testing.T, tests []readTest, read func(io.Reader) ([]byte, erro
 			in = tt.in[:j] + tt.in[j+len("ℙ"):]
 			testOut = tt.in[:j]
 		}
+		d := strings.Index(tt.in, "𝔻")
+		if d >= 0 {
+			in = in[:d] + in[d+len("𝔻"):]
+			testOut = testOut[d+len("𝔻"):]
+		}
 		r := strings.NewReader(in)
 		buf, err := read(r)
 		if err != nil {
diff --git a/src/cmd/go/internal/list/list.go b/src/cmd/go/internal/list/list.go
index 53aaf311ec..7cb9ec6d94 100644
--- a/src/cmd/go/internal/list/list.go
+++ b/src/cmd/go/internal/list/list.go
@@ -724,8 +724,18 @@ func runList(ctx context.Context, cmd *base.Command, args []string) {
 
 	// Record non-identity import mappings in p.ImportMap.
 	for _, p := range pkgs {
-		for i, srcPath := range p.Internal.RawImports {
-			path := p.Imports[i]
+		nRaw := len(p.Internal.RawImports)
+		for i, path := range p.Imports {
+			var srcPath string
+			if i < nRaw {
+				srcPath = p.Internal.RawImports[i]
+			} else {
+				// This path is not within the raw imports, so it must be an import
+				// found only within CompiledGoFiles. Those paths are found in
+				// CompiledImports.
+				srcPath = p.Internal.CompiledImports[i-nRaw]
+			}
+
 			if path != srcPath {
 				if p.ImportMap == nil {
 					p.ImportMap = make(map[string]string)
diff --git a/src/cmd/go/internal/load/pkg.go b/src/cmd/go/internal/load/pkg.go
index fa040bf5b1..b3527c7308 100644
--- a/src/cmd/go/internal/load/pkg.go
+++ b/src/cmd/go/internal/load/pkg.go
@@ -87,6 +87,7 @@ type PackagePublic struct {
 	CgoFiles          []string `json:",omitempty"` // .go source files that import "C"
 	CompiledGoFiles   []string `json:",omitempty"` // .go output from running cgo on CgoFiles
 	IgnoredGoFiles    []string `json:",omitempty"` // .go source files ignored due to build constraints
+	InvalidGoFiles    []string `json:",omitempty"` // .go source files with detected problems (parse error, wrong package name, and so on)
 	IgnoredOtherFiles []string `json:",omitempty"` // non-.go source files ignored due to build constraints
 	CFiles            []string `json:",omitempty"` // .c source files
 	CXXFiles          []string `json:",omitempty"` // .cc, .cpp and .cxx source files
@@ -144,6 +145,7 @@ func (p *Package) AllFiles() []string {
 		p.CgoFiles,
 		// no p.CompiledGoFiles, because they are from GoFiles or generated by us
 		p.IgnoredGoFiles,
+		// no p.InvalidGoFiles, because they are from GoFiles
 		p.IgnoredOtherFiles,
 		p.CFiles,
 		p.CXXFiles,
@@ -192,8 +194,8 @@ type PackageInternal struct {
 	// Unexported fields are not part of the public API.
 	Build             *build.Package
 	Imports           []*Package           // this package's direct imports
-	CompiledImports   []string             // additional Imports necessary when using CompiledGoFiles (all from standard library)
-	RawImports        []string             // this package's original imports as they appear in the text of the program
+	CompiledImports   []string             // additional Imports necessary when using CompiledGoFiles (all from standard library); 1:1 with the end of PackagePublic.Imports
+	RawImports        []string             // this package's original imports as they appear in the text of the program; 1:1 with the end of PackagePublic.Imports
 	ForceLibrary      bool                 // this package is a library (even if named "main")
 	CmdlineFiles      bool                 // package built from files listed on command line
 	CmdlinePkg        bool                 // package listed on command line
@@ -371,6 +373,7 @@ func (p *Package) copyBuild(opts PackageOpts, pp *build.Package) {
 	p.GoFiles = pp.GoFiles
 	p.CgoFiles = pp.CgoFiles
 	p.IgnoredGoFiles = pp.IgnoredGoFiles
+	p.InvalidGoFiles = pp.InvalidGoFiles
 	p.IgnoredOtherFiles = pp.IgnoredOtherFiles
 	p.CFiles = pp.CFiles
 	p.CXXFiles = pp.CXXFiles
@@ -852,7 +855,9 @@ func loadPackageData(ctx context.Context, path, parentPath, parentDir, parentRoo
 				buildMode = build.ImportComment
 			}
 			data.p, data.err = cfg.BuildContext.ImportDir(r.dir, buildMode)
-			if data.p.Root == "" && cfg.ModulesEnabled {
+			if cfg.ModulesEnabled {
+				// Override data.p.Root, since ImportDir sets it to $GOPATH, if
+				// the module is inside $GOPATH/src.
 				if info := modload.PackageModuleInfo(ctx, path); info != nil {
 					data.p.Root = info.Dir
 				}
@@ -1800,35 +1805,37 @@ func (p *Package) load(ctx context.Context, opts PackageOpts, path string, stk *
 		}
 	}
 
-	// Cgo translation adds imports of "unsafe", "runtime/cgo" and "syscall",
-	// except for certain packages, to avoid circular dependencies.
-	if p.UsesCgo() {
-		addImport("unsafe", true)
-	}
-	if p.UsesCgo() && (!p.Standard || !cgoExclude[p.ImportPath]) && cfg.BuildContext.Compiler != "gccgo" {
-		addImport("runtime/cgo", true)
-	}
-	if p.UsesCgo() && (!p.Standard || !cgoSyscallExclude[p.ImportPath]) {
-		addImport("syscall", true)
-	}
-
-	// SWIG adds imports of some standard packages.
-	if p.UsesSwig() {
-		addImport("unsafe", true)
-		if cfg.BuildContext.Compiler != "gccgo" {
+	if !opts.IgnoreImports {
+		// Cgo translation adds imports of "unsafe", "runtime/cgo" and "syscall",
+		// except for certain packages, to avoid circular dependencies.
+		if p.UsesCgo() {
+			addImport("unsafe", true)
+		}
+		if p.UsesCgo() && (!p.Standard || !cgoExclude[p.ImportPath]) && cfg.BuildContext.Compiler != "gccgo" {
 			addImport("runtime/cgo", true)
 		}
-		addImport("syscall", true)
-		addImport("sync", true)
+		if p.UsesCgo() && (!p.Standard || !cgoSyscallExclude[p.ImportPath]) {
+			addImport("syscall", true)
+		}
 
-		// TODO: The .swig and .swigcxx files can use
-		// %go_import directives to import other packages.
-	}
+		// SWIG adds imports of some standard packages.
+		if p.UsesSwig() {
+			addImport("unsafe", true)
+			if cfg.BuildContext.Compiler != "gccgo" {
+				addImport("runtime/cgo", true)
+			}
+			addImport("syscall", true)
+			addImport("sync", true)
 
-	// The linker loads implicit dependencies.
-	if p.Name == "main" && !p.Internal.ForceLibrary {
-		for _, dep := range LinkerDeps(p) {
-			addImport(dep, false)
+			// TODO: The .swig and .swigcxx files can use
+			// %go_import directives to import other packages.
+		}
+
+		// The linker loads implicit dependencies.
+		if p.Name == "main" && !p.Internal.ForceLibrary {
+			for _, dep := range LinkerDeps(p) {
+				addImport(dep, false)
+			}
 		}
 	}
 
@@ -2390,7 +2397,9 @@ func LoadImportWithFlags(path, srcDir string, parent *Package, stk *ImportStack,
 // PackageOpts control the behavior of PackagesAndErrors and other package
 // loading functions.
 type PackageOpts struct {
-	// IgnoreImports controls whether we ignore imports when loading packages.
+	// IgnoreImports controls whether we ignore explicit and implicit imports
+	// when loading packages.  Implicit imports are added when supporting Cgo
+	// or SWIG and when linking main packages.
 	IgnoreImports bool
 
 	// ModResolveTests indicates whether calls to the module loader should also
@@ -2499,7 +2508,7 @@ func PackagesAndErrors(ctx context.Context, opts PackageOpts, patterns []string)
 	}
 
 	if opts.MainOnly {
-		pkgs = mainPackagesOnly(pkgs, patterns)
+		pkgs = mainPackagesOnly(pkgs, matches)
 	}
 
 	// Now that CmdlinePkg is set correctly,
@@ -2553,50 +2562,63 @@ func CheckPackageErrors(pkgs []*Package) {
 // mainPackagesOnly filters out non-main packages matched only by arguments
 // containing "..." and returns the remaining main packages.
 //
+// Packages with missing, invalid, or ambiguous names may be treated as
+// possibly-main packages.
+//
 // mainPackagesOnly sets a non-main package's Error field and returns it if it
 // is named by a literal argument.
 //
 // mainPackagesOnly prints warnings for non-literal arguments that only match
 // non-main packages.
-func mainPackagesOnly(pkgs []*Package, patterns []string) []*Package {
-	matchers := make([]func(string) bool, len(patterns))
-	for i, p := range patterns {
-		if strings.Contains(p, "...") {
-			matchers[i] = search.MatchPattern(p)
+func mainPackagesOnly(pkgs []*Package, matches []*search.Match) []*Package {
+	treatAsMain := map[string]bool{}
+	for _, m := range matches {
+		if m.IsLiteral() {
+			for _, path := range m.Pkgs {
+				treatAsMain[path] = true
+			}
 		}
 	}
 
-	matchedPkgs := make([]*Package, 0, len(pkgs))
-	mainCount := make([]int, len(patterns))
-	nonMainCount := make([]int, len(patterns))
+	var mains []*Package
 	for _, pkg := range pkgs {
-		if pkg.Name == "main" || (pkg.Incomplete && pkg.Name == "") {
-			matchedPkgs = append(matchedPkgs, pkg)
-			for i := range patterns {
-				if matchers[i] != nil && matchers[i](pkg.ImportPath) {
-					mainCount[i]++
-				}
-			}
-		} else {
-			for i := range patterns {
-				if matchers[i] == nil && patterns[i] == pkg.ImportPath {
-					if pkg.Error == nil {
-						pkg.Error = &PackageError{Err: &mainPackageError{importPath: pkg.ImportPath}}
-					}
-					matchedPkgs = append(matchedPkgs, pkg)
-				} else if matchers[i] != nil && matchers[i](pkg.ImportPath) {
-					nonMainCount[i]++
-				}
-			}
+		if pkg.Name == "main" {
+			treatAsMain[pkg.ImportPath] = true
+			mains = append(mains, pkg)
+			continue
 		}
-	}
-	for i, p := range patterns {
-		if matchers[i] != nil && mainCount[i] == 0 && nonMainCount[i] > 0 {
-			fmt.Fprintf(os.Stderr, "go: warning: %q matched no main packages\n", p)
+
+		if len(pkg.InvalidGoFiles) > 0 { // TODO(#45999): && pkg.Name == "", but currently go/build sets pkg.Name arbitrarily if it is ambiguous.
+			// The package has (or may have) conflicting names, and we can't easily
+			// tell whether one of them is "main". So assume that it could be, and
+			// report an error for the package.
+			treatAsMain[pkg.ImportPath] = true
+		}
+		if treatAsMain[pkg.ImportPath] {
+			if pkg.Error == nil {
+				pkg.Error = &PackageError{Err: &mainPackageError{importPath: pkg.ImportPath}}
+			}
+			mains = append(mains, pkg)
 		}
 	}
 
-	return matchedPkgs
+	for _, m := range matches {
+		if m.IsLiteral() || len(m.Pkgs) == 0 {
+			continue
+		}
+		foundMain := false
+		for _, path := range m.Pkgs {
+			if treatAsMain[path] {
+				foundMain = true
+				break
+			}
+		}
+		if !foundMain {
+			fmt.Fprintf(os.Stderr, "go: warning: %q matched only non-main packages\n", m.Pattern())
+		}
+	}
+
+	return mains
 }
 
 type mainPackageError struct {
diff --git a/src/cmd/go/internal/load/test.go b/src/cmd/go/internal/load/test.go
index 6baa1db14f..c828296566 100644
--- a/src/cmd/go/internal/load/test.go
+++ b/src/cmd/go/internal/load/test.go
@@ -116,7 +116,7 @@ func TestPackagesAndErrors(ctx context.Context, opts PackageOpts, p *Package, co
 			// Can't change that code, because that code is only for loading the
 			// non-test copy of a package.
 			ptestErr = &PackageError{
-				ImportStack:   testImportStack(stk[0], p1, p.ImportPath),
+				ImportStack:   importCycleStack(p1, p.ImportPath),
 				Err:           errors.New("import cycle not allowed in test"),
 				IsImportCycle: true,
 			}
@@ -375,22 +375,44 @@ func TestPackagesAndErrors(ctx context.Context, opts PackageOpts, p *Package, co
 	return pmain, ptest, pxtest
 }
 
-func testImportStack(top string, p *Package, target string) []string {
-	stk := []string{top, p.ImportPath}
-Search:
-	for p.ImportPath != target {
-		for _, p1 := range p.Internal.Imports {
-			if p1.ImportPath == target || str.Contains(p1.Deps, target) {
-				stk = append(stk, p1.ImportPath)
-				p = p1
-				continue Search
+// importCycleStack returns an import stack from p to the package whose import
+// path is target.
+func importCycleStack(p *Package, target string) []string {
+	// importerOf maps each import path to its importer nearest to p.
+	importerOf := map[string]string{p.ImportPath: ""}
+
+	// q is a breadth-first queue of packages to search for target.
+	// Every package added to q has a corresponding entry in pathTo.
+	//
+	// We search breadth-first for two reasons:
+	//
+	// 	1. We want to report the shortest cycle.
+	//
+	// 	2. If p contains multiple cycles, the first cycle we encounter might not
+	// 	   contain target. To ensure termination, we have to break all cycles
+	// 	   other than the first.
+	q := []*Package{p}
+
+	for len(q) > 0 {
+		p := q[0]
+		q = q[1:]
+		if path := p.ImportPath; path == target {
+			var stk []string
+			for path != "" {
+				stk = append(stk, path)
+				path = importerOf[path]
+			}
+			return stk
+		}
+		for _, dep := range p.Internal.Imports {
+			if _, ok := importerOf[dep.ImportPath]; !ok {
+				importerOf[dep.ImportPath] = p.ImportPath
+				q = append(q, dep)
 			}
 		}
-		// Can't happen, but in case it does...
-		stk = append(stk, "")
-		break
 	}
-	return stk
+
+	panic("lost path to cycle")
 }
 
 // recompileForTest copies and replaces certain packages in pmain's dependency
diff --git a/src/cmd/go/internal/lockedfile/lockedfile_filelock.go b/src/cmd/go/internal/lockedfile/lockedfile_filelock.go
index 729df5c681..e4923f6876 100644
--- a/src/cmd/go/internal/lockedfile/lockedfile_filelock.go
+++ b/src/cmd/go/internal/lockedfile/lockedfile_filelock.go
@@ -11,7 +11,6 @@ import (
 	"io/fs"
 	"os"
 
-	"cmd/go/internal/fsys"
 	"cmd/go/internal/lockedfile/internal/filelock"
 )
 
@@ -21,7 +20,7 @@ func openFile(name string, flag int, perm fs.FileMode) (*os.File, error) {
 	// calls for Linux and Windows anyway, so it's simpler to use that approach
 	// consistently.
 
-	f, err := fsys.OpenFile(name, flag&^os.O_TRUNC, perm)
+	f, err := os.OpenFile(name, flag&^os.O_TRUNC, perm)
 	if err != nil {
 		return nil, err
 	}
diff --git a/src/cmd/go/internal/lockedfile/lockedfile_plan9.go b/src/cmd/go/internal/lockedfile/lockedfile_plan9.go
index 3d4b97d78e..979118b10a 100644
--- a/src/cmd/go/internal/lockedfile/lockedfile_plan9.go
+++ b/src/cmd/go/internal/lockedfile/lockedfile_plan9.go
@@ -13,8 +13,6 @@ import (
 	"os"
 	"strings"
 	"time"
-
-	"cmd/go/internal/fsys"
 )
 
 // Opening an exclusive-use file returns an error.
@@ -59,7 +57,7 @@ func openFile(name string, flag int, perm fs.FileMode) (*os.File, error) {
 	// If the file was unpacked or created by some other program, it might not
 	// have the ModeExclusive bit set. Set it before we call OpenFile, so that we
 	// can be confident that a successful OpenFile implies exclusive use.
-	if fi, err := fsys.Stat(name); err == nil {
+	if fi, err := os.Stat(name); err == nil {
 		if fi.Mode()&fs.ModeExclusive == 0 {
 			if err := os.Chmod(name, fi.Mode()|fs.ModeExclusive); err != nil {
 				return nil, err
@@ -72,7 +70,7 @@ func openFile(name string, flag int, perm fs.FileMode) (*os.File, error) {
 	nextSleep := 1 * time.Millisecond
 	const maxSleep = 500 * time.Millisecond
 	for {
-		f, err := fsys.OpenFile(name, flag, perm|fs.ModeExclusive)
+		f, err := os.OpenFile(name, flag, perm|fs.ModeExclusive)
 		if err == nil {
 			return f, nil
 		}
diff --git a/src/cmd/go/internal/modcmd/download.go b/src/cmd/go/internal/modcmd/download.go
index a6c6d914e1..0e5af85237 100644
--- a/src/cmd/go/internal/modcmd/download.go
+++ b/src/cmd/go/internal/modcmd/download.go
@@ -86,9 +86,11 @@ func runDownload(ctx context.Context, cmd *base.Command, args []string) {
 	if !modload.HasModRoot() && len(args) == 0 {
 		base.Fatalf("go mod download: no modules specified (see 'go help mod download')")
 	}
-	if len(args) == 0 {
+	haveExplicitArgs := len(args) > 0
+	if !haveExplicitArgs {
 		args = []string{"all"}
-	} else if modload.HasModRoot() {
+	}
+	if modload.HasModRoot() {
 		modload.LoadModFile(ctx) // to fill Target
 		targetAtUpgrade := modload.Target.Path + "@upgrade"
 		targetAtPatch := modload.Target.Path + "@patch"
@@ -135,6 +137,18 @@ func runDownload(ctx context.Context, cmd *base.Command, args []string) {
 	type token struct{}
 	sem := make(chan token, runtime.GOMAXPROCS(0))
 	infos, infosErr := modload.ListModules(ctx, args, 0)
+	if !haveExplicitArgs {
+		// 'go mod download' is sometimes run without arguments to pre-populate the
+		// module cache. It may fetch modules that aren't needed to build packages
+		// in the main mdoule. This is usually not intended, so don't save sums for
+		// downloaded modules (golang.org/issue/45332).
+		// TODO(golang.org/issue/45551): For now, in ListModules, save sums needed
+		// to load the build list (same as 1.15 behavior). In the future, report an
+		// error if go.mod or go.sum need to be updated after loading the build
+		// list.
+		modload.DisallowWriteGoMod()
+	}
+
 	for _, info := range infos {
 		if info.Replace != nil {
 			info = info.Replace
@@ -185,8 +199,15 @@ func runDownload(ctx context.Context, cmd *base.Command, args []string) {
 		base.ExitIfErrors()
 	}
 
-	// Update go.mod and especially go.sum if needed.
-	modload.WriteGoMod(ctx)
+	// If there were explicit arguments, update go.mod and especially go.sum.
+	// 'go mod download mod@version' is a useful way to add a sum without using
+	// 'go get mod@version', which may have other side effects. We print this in
+	// some error message hints.
+	//
+	// Don't save sums for 'go mod download' without arguments; see comment above.
+	if haveExplicitArgs {
+		modload.WriteGoMod(ctx)
+	}
 
 	// If there was an error matching some of the requested packages, emit it now
 	// (after we've written the checksums for the modules that were downloaded
diff --git a/src/cmd/go/internal/modcmd/edit.go b/src/cmd/go/internal/modcmd/edit.go
index 79a93ca44b..bb3d521092 100644
--- a/src/cmd/go/internal/modcmd/edit.go
+++ b/src/cmd/go/internal/modcmd/edit.go
@@ -25,7 +25,7 @@ import (
 )
 
 var cmdEdit = &base.Command{
-	UsageLine: "go mod edit [editing flags] [go.mod]",
+	UsageLine: "go mod edit [editing flags] [-fmt|-print|-json] [go.mod]",
 	Short:     "edit go.mod from tools or scripts",
 	Long: `
 Edit provides a command-line interface for editing go.mod,
@@ -196,7 +196,7 @@ func runEdit(ctx context.Context, cmd *base.Command, args []string) {
 
 	if *editGo != "" {
 		if !modfile.GoVersionRE.MatchString(*editGo) {
-			base.Fatalf(`go mod: invalid -go option; expecting something like "-go 1.12"`)
+			base.Fatalf(`go mod: invalid -go option; expecting something like "-go %s"`, modload.LatestGoVersion())
 		}
 	}
 
diff --git a/src/cmd/go/internal/modcmd/graph.go b/src/cmd/go/internal/modcmd/graph.go
index 77853304e9..ac81f26dad 100644
--- a/src/cmd/go/internal/modcmd/graph.go
+++ b/src/cmd/go/internal/modcmd/graph.go
@@ -18,7 +18,7 @@ import (
 )
 
 var cmdGraph = &base.Command{
-	UsageLine: "go mod graph",
+	UsageLine: "go mod graph [-go=version]",
 	Short:     "print module requirement graph",
 	Long: `
 Graph prints the module requirement graph (with replacements applied)
@@ -26,12 +26,21 @@ in text form. Each line in the output has two space-separated fields: a module
 and one of its requirements. Each module is identified as a string of the form
 path@version, except for the main module, which has no @version suffix.
 
+The -go flag causes graph to report the module graph as loaded by the
+given Go version, instead of the version indicated by the 'go' directive
+in the go.mod file.
+
 See https://golang.org/ref/mod#go-mod-graph for more about 'go mod graph'.
 	`,
 	Run: runGraph,
 }
 
+var (
+	graphGo goVersionFlag
+)
+
 func init() {
+	cmdGraph.Flag.Var(&graphGo, "go", "")
 	base.AddModCommonFlags(&cmdGraph.Flag)
 }
 
@@ -41,7 +50,7 @@ func runGraph(ctx context.Context, cmd *base.Command, args []string) {
 	}
 	modload.ForceUseModules = true
 	modload.RootMode = modload.NeedRoot
-	mg := modload.LoadModGraph(ctx)
+	mg := modload.LoadModGraph(ctx, graphGo.String())
 
 	w := bufio.NewWriter(os.Stdout)
 	defer w.Flush()
diff --git a/src/cmd/go/internal/modcmd/init.go b/src/cmd/go/internal/modcmd/init.go
index 73cc282d81..958c3066ac 100644
--- a/src/cmd/go/internal/modcmd/init.go
+++ b/src/cmd/go/internal/modcmd/init.go
@@ -13,7 +13,7 @@ import (
 )
 
 var cmdInit = &base.Command{
-	UsageLine: "go mod init [module]",
+	UsageLine: "go mod init [module-path]",
 	Short:     "initialize new module in current directory",
 	Long: `
 Init initializes and writes a new go.mod file in the current directory, in
diff --git a/src/cmd/go/internal/modcmd/tidy.go b/src/cmd/go/internal/modcmd/tidy.go
index c72ec30a57..fe25507e94 100644
--- a/src/cmd/go/internal/modcmd/tidy.go
+++ b/src/cmd/go/internal/modcmd/tidy.go
@@ -12,12 +12,14 @@ import (
 	"cmd/go/internal/imports"
 	"cmd/go/internal/modload"
 	"context"
+	"fmt"
 
 	"golang.org/x/mod/modfile"
+	"golang.org/x/mod/semver"
 )
 
 var cmdTidy = &base.Command{
-	UsageLine: "go mod tidy [-e] [-v] [-go=version]",
+	UsageLine: "go mod tidy [-e] [-v] [-go=version] [-compat=version]",
 	Short:     "add missing and remove unused modules",
 	Long: `
 Tidy makes sure go.mod matches the source code in the module.
@@ -38,34 +40,64 @@ are retained as explicit requirements in the go.mod file.
 (Go versions 1.17 and higher retain more requirements in order to
 support lazy module loading.)
 
+The -compat flag preserves any additional checksums needed for the
+'go' command from the indicated major Go release to successfully load
+the module graph, and causes tidy to error out if that version of the
+'go' command would load any imported package from a different module
+version. By default, tidy acts as if the -compat flag were set to the
+version prior to the one indicated by the 'go' directive in the go.mod
+file.
+
 See https://golang.org/ref/mod#go-mod-tidy for more about 'go mod tidy'.
 	`,
 	Run: runTidy,
 }
 
 var (
-	tidyE  bool   // if true, report errors but proceed anyway.
-	tidyGo string // go version to write to the tidied go.mod file (toggles lazy loading)
+	tidyE      bool          // if true, report errors but proceed anyway.
+	tidyGo     goVersionFlag // go version to write to the tidied go.mod file (toggles lazy loading)
+	tidyCompat goVersionFlag // go version for which the tidied go.mod and go.sum files should be “compatible”
 )
 
 func init() {
 	cmdTidy.Flag.BoolVar(&cfg.BuildV, "v", false, "")
 	cmdTidy.Flag.BoolVar(&tidyE, "e", false, "")
-	cmdTidy.Flag.StringVar(&tidyGo, "go", "", "")
+	cmdTidy.Flag.Var(&tidyGo, "go", "")
+	cmdTidy.Flag.Var(&tidyCompat, "compat", "")
 	base.AddModCommonFlags(&cmdTidy.Flag)
 }
 
+// A goVersionFlag is a flag.Value representing a supported Go version.
+//
+// (Note that the -go argument to 'go mod edit' is *not* a goVersionFlag.
+// It intentionally allows newer-than-supported versions as arguments.)
+type goVersionFlag struct {
+	v string
+}
+
+func (f *goVersionFlag) String() string   { return f.v }
+func (f *goVersionFlag) Get() interface{} { return f.v }
+
+func (f *goVersionFlag) Set(s string) error {
+	if s != "" {
+		latest := modload.LatestGoVersion()
+		if !modfile.GoVersionRE.MatchString(s) {
+			return fmt.Errorf("expecting a Go version like %q", latest)
+		}
+		if semver.Compare("v"+s, "v"+latest) > 0 {
+			return fmt.Errorf("maximum supported Go version is %s", latest)
+		}
+	}
+
+	f.v = s
+	return nil
+}
+
 func runTidy(ctx context.Context, cmd *base.Command, args []string) {
 	if len(args) > 0 {
 		base.Fatalf("go mod tidy: no arguments allowed")
 	}
 
-	if tidyGo != "" {
-		if !modfile.GoVersionRE.MatchString(tidyGo) {
-			base.Fatalf(`go mod: invalid -go option %q; expecting something like "-go 1.17"`, tidyGo)
-		}
-	}
-
 	// Tidy aims to make 'go test' reproducible for any package in 'all', so we
 	// need to include test dependencies. For modules that specify go 1.15 or
 	// earlier this is a no-op (because 'all' saturates transitive test
@@ -80,9 +112,10 @@ func runTidy(ctx context.Context, cmd *base.Command, args []string) {
 	modload.RootMode = modload.NeedRoot
 
 	modload.LoadPackages(ctx, modload.PackageOpts{
-		GoVersion:                tidyGo,
+		GoVersion:                tidyGo.String(),
 		Tags:                     imports.AnyTags(),
 		Tidy:                     true,
+		TidyCompatibleVersion:    tidyCompat.String(),
 		VendorModulesInGOROOTSrc: true,
 		ResolveMissingImports:    true,
 		LoadTests:                true,
diff --git a/src/cmd/go/internal/modcmd/vendor.go b/src/cmd/go/internal/modcmd/vendor.go
index 8e1c0432f7..713d5f9f3f 100644
--- a/src/cmd/go/internal/modcmd/vendor.go
+++ b/src/cmd/go/internal/modcmd/vendor.go
@@ -13,6 +13,7 @@ import (
 	"io"
 	"io/fs"
 	"os"
+	"path"
 	"path/filepath"
 	"sort"
 	"strings"
@@ -299,7 +300,7 @@ func copyMetadata(modPath, pkg, dst, src string, copiedFiles map[string]bool) {
 		if modPath == pkg {
 			break
 		}
-		pkg = filepath.Dir(pkg)
+		pkg = path.Dir(pkg)
 		dst = filepath.Dir(dst)
 		src = filepath.Dir(src)
 	}
diff --git a/src/cmd/go/internal/modcmd/verify.go b/src/cmd/go/internal/modcmd/verify.go
index 5c321c783a..5a6eca32cf 100644
--- a/src/cmd/go/internal/modcmd/verify.go
+++ b/src/cmd/go/internal/modcmd/verify.go
@@ -54,7 +54,8 @@ func runVerify(ctx context.Context, cmd *base.Command, args []string) {
 	sem := make(chan token, runtime.GOMAXPROCS(0))
 
 	// Use a slice of result channels, so that the output is deterministic.
-	mods := modload.LoadModGraph(ctx).BuildList()[1:]
+	const defaultGoVersion = ""
+	mods := modload.LoadModGraph(ctx, defaultGoVersion).BuildList()[1:]
 	errsChans := make([]<-chan []error, len(mods))
 
 	for i, mod := range mods {
diff --git a/src/cmd/go/internal/modfetch/cache.go b/src/cmd/go/internal/modfetch/cache.go
index f3b58a172a..b01b467413 100644
--- a/src/cmd/go/internal/modfetch/cache.go
+++ b/src/cmd/go/internal/modfetch/cache.go
@@ -152,7 +152,7 @@ func lockVersion(mod module.Version) (unlock func(), err error) {
 // If err is nil, the caller MUST eventually call the unlock function.
 func SideLock() (unlock func(), err error) {
 	if err := checkCacheDir(); err != nil {
-		base.Fatalf("go: %v", err)
+		return nil, err
 	}
 
 	path := filepath.Join(cfg.GOMODCACHE, "cache", "lock")
diff --git a/src/cmd/go/internal/modfetch/codehost/git_test.go b/src/cmd/go/internal/modfetch/codehost/git_test.go
index 89a73baad9..a684fa1a9b 100644
--- a/src/cmd/go/internal/modfetch/codehost/git_test.go
+++ b/src/cmd/go/internal/modfetch/codehost/git_test.go
@@ -8,7 +8,6 @@ import (
 	"archive/zip"
 	"bytes"
 	"flag"
-	"fmt"
 	"internal/testenv"
 	"io"
 	"io/fs"
@@ -47,12 +46,6 @@ var altRepos = []string{
 var localGitRepo string
 
 func testMain(m *testing.M) int {
-	if _, err := exec.LookPath("git"); err != nil {
-		fmt.Fprintln(os.Stderr, "skipping because git binary not found")
-		fmt.Println("PASS")
-		return 0
-	}
-
 	dir, err := os.MkdirTemp("", "gitrepo-test-")
 	if err != nil {
 		log.Fatal(err)
@@ -60,23 +53,25 @@ func testMain(m *testing.M) int {
 	defer os.RemoveAll(dir)
 
 	if testenv.HasExternalNetwork() && testenv.HasExec() {
-		// Clone gitrepo1 into a local directory.
-		// If we use a file:// URL to access the local directory,
-		// then git starts up all the usual protocol machinery,
-		// which will let us test remote git archive invocations.
-		localGitRepo = filepath.Join(dir, "gitrepo2")
-		if _, err := Run("", "git", "clone", "--mirror", gitrepo1, localGitRepo); err != nil {
-			log.Fatal(err)
-		}
-		if _, err := Run(localGitRepo, "git", "config", "daemon.uploadarch", "true"); err != nil {
-			log.Fatal(err)
+		if _, err := exec.LookPath("git"); err == nil {
+			// Clone gitrepo1 into a local directory.
+			// If we use a file:// URL to access the local directory,
+			// then git starts up all the usual protocol machinery,
+			// which will let us test remote git archive invocations.
+			localGitRepo = filepath.Join(dir, "gitrepo2")
+			if _, err := Run("", "git", "clone", "--mirror", gitrepo1, localGitRepo); err != nil {
+				log.Fatal(err)
+			}
+			if _, err := Run(localGitRepo, "git", "config", "daemon.uploadarch", "true"); err != nil {
+				log.Fatal(err)
+			}
 		}
 	}
 
 	return m.Run()
 }
 
-func testRepo(remote string) (Repo, error) {
+func testRepo(t *testing.T, remote string) (Repo, error) {
 	if remote == "localGitRepo" {
 		// Convert absolute path to file URL. LocalGitRepo will not accept
 		// Windows absolute paths because they look like a host:path remote.
@@ -87,15 +82,17 @@ func testRepo(remote string) (Repo, error) {
 		} else {
 			url = "file:///" + filepath.ToSlash(localGitRepo)
 		}
+		testenv.MustHaveExecPath(t, "git")
 		return LocalGitRepo(url)
 	}
-	kind := "git"
+	vcs := "git"
 	for _, k := range []string{"hg"} {
 		if strings.Contains(remote, "/"+k+"/") {
-			kind = k
+			vcs = k
 		}
 	}
-	return NewRepo(kind, remote)
+	testenv.MustHaveExecPath(t, vcs)
+	return NewRepo(vcs, remote)
 }
 
 var tagsTests = []struct {
@@ -116,7 +113,7 @@ func TestTags(t *testing.T) {
 
 	for _, tt := range tagsTests {
 		f := func(t *testing.T) {
-			r, err := testRepo(tt.repo)
+			r, err := testRepo(t, tt.repo)
 			if err != nil {
 				t.Fatal(err)
 			}
@@ -168,7 +165,7 @@ func TestLatest(t *testing.T) {
 
 	for _, tt := range latestTests {
 		f := func(t *testing.T) {
-			r, err := testRepo(tt.repo)
+			r, err := testRepo(t, tt.repo)
 			if err != nil {
 				t.Fatal(err)
 			}
@@ -221,7 +218,7 @@ func TestReadFile(t *testing.T) {
 
 	for _, tt := range readFileTests {
 		f := func(t *testing.T) {
-			r, err := testRepo(tt.repo)
+			r, err := testRepo(t, tt.repo)
 			if err != nil {
 				t.Fatal(err)
 			}
@@ -412,7 +409,7 @@ func TestReadZip(t *testing.T) {
 
 	for _, tt := range readZipTests {
 		f := func(t *testing.T) {
-			r, err := testRepo(tt.repo)
+			r, err := testRepo(t, tt.repo)
 			if err != nil {
 				t.Fatal(err)
 			}
@@ -581,7 +578,7 @@ func TestStat(t *testing.T) {
 
 	for _, tt := range statTests {
 		f := func(t *testing.T) {
-			r, err := testRepo(tt.repo)
+			r, err := testRepo(t, tt.repo)
 			if err != nil {
 				t.Fatal(err)
 			}
diff --git a/src/cmd/go/internal/modfetch/coderepo.go b/src/cmd/go/internal/modfetch/coderepo.go
index f817a04583..dfef9f73c2 100644
--- a/src/cmd/go/internal/modfetch/coderepo.go
+++ b/src/cmd/go/internal/modfetch/coderepo.go
@@ -864,22 +864,25 @@ func (r *codeRepo) GoMod(version string) (data []byte, err error) {
 	data, err = r.code.ReadFile(rev, path.Join(dir, "go.mod"), codehost.MaxGoMod)
 	if err != nil {
 		if os.IsNotExist(err) {
-			return r.legacyGoMod(rev, dir), nil
+			return LegacyGoMod(r.modPath), nil
 		}
 		return nil, err
 	}
 	return data, nil
 }
 
-func (r *codeRepo) legacyGoMod(rev, dir string) []byte {
-	// We used to try to build a go.mod reflecting pre-existing
-	// package management metadata files, but the conversion
-	// was inherently imperfect (because those files don't have
-	// exactly the same semantics as go.mod) and, when done
-	// for dependencies in the middle of a build, impossible to
-	// correct. So we stopped.
-	// Return a fake go.mod that simply declares the module path.
-	return []byte(fmt.Sprintf("module %s\n", modfile.AutoQuote(r.modPath)))
+// LegacyGoMod generates a fake go.mod file for a module that doesn't have one.
+// The go.mod file contains a module directive and nothing else: no go version,
+// no requirements.
+//
+// We used to try to build a go.mod reflecting pre-existing
+// package management metadata files, but the conversion
+// was inherently imperfect (because those files don't have
+// exactly the same semantics as go.mod) and, when done
+// for dependencies in the middle of a build, impossible to
+// correct. So we stopped.
+func LegacyGoMod(modPath string) []byte {
+	return []byte(fmt.Sprintf("module %s\n", modfile.AutoQuote(modPath)))
 }
 
 func (r *codeRepo) modPrefix(rev string) string {
diff --git a/src/cmd/go/internal/modfetch/fetch.go b/src/cmd/go/internal/modfetch/fetch.go
index e40593abae..d3d30d970b 100644
--- a/src/cmd/go/internal/modfetch/fetch.go
+++ b/src/cmd/go/internal/modfetch/fetch.go
@@ -22,6 +22,7 @@ import (
 
 	"cmd/go/internal/base"
 	"cmd/go/internal/cfg"
+	"cmd/go/internal/fsys"
 	"cmd/go/internal/lockedfile"
 	"cmd/go/internal/par"
 	"cmd/go/internal/robustio"
@@ -416,7 +417,18 @@ func initGoSum() (bool, error) {
 
 	goSum.m = make(map[module.Version][]string)
 	goSum.status = make(map[modSum]modSumStatus)
-	data, err := lockedfile.Read(GoSumFile)
+	var (
+		data []byte
+		err  error
+	)
+	if actualSumFile, ok := fsys.OverlayPath(GoSumFile); ok {
+		// Don't lock go.sum if it's part of the overlay.
+		// On Plan 9, locking requires chmod, and we don't want to modify any file
+		// in the overlay. See #44700.
+		data, err = os.ReadFile(actualSumFile)
+	} else {
+		data, err = lockedfile.Read(GoSumFile)
+	}
 	if err != nil && !os.IsNotExist(err) {
 		return false, err
 	}
@@ -716,6 +728,9 @@ Outer:
 	if cfg.BuildMod == "readonly" {
 		base.Fatalf("go: updates to go.sum needed, disabled by -mod=readonly")
 	}
+	if _, ok := fsys.OverlayPath(GoSumFile); ok {
+		base.Fatalf("go: updates to go.sum needed, but go.sum is part of the overlay specified with -overlay")
+	}
 
 	// Make a best-effort attempt to acquire the side lock, only to exclude
 	// previous versions of the 'go' command from making simultaneous edits.
diff --git a/src/cmd/go/internal/modget/get.go b/src/cmd/go/internal/modget/get.go
index 3a24b6a2f7..9672e5598e 100644
--- a/src/cmd/go/internal/modget/get.go
+++ b/src/cmd/go/internal/modget/get.go
@@ -38,6 +38,7 @@ import (
 	"cmd/go/internal/base"
 	"cmd/go/internal/imports"
 	"cmd/go/internal/load"
+	"cmd/go/internal/modfetch"
 	"cmd/go/internal/modload"
 	"cmd/go/internal/par"
 	"cmd/go/internal/search"
@@ -386,14 +387,14 @@ func runGet(ctx context.Context, cmd *base.Command, args []string) {
 		}
 		load.CheckPackageErrors(pkgs)
 
-		haveExe := false
+		haveExternalExe := false
 		for _, pkg := range pkgs {
-			if pkg.Name == "main" {
-				haveExe = true
+			if pkg.Name == "main" && pkg.Module != nil && pkg.Module.Path != modload.Target.Path {
+				haveExternalExe = true
 				break
 			}
 		}
-		if haveExe {
+		if haveExternalExe {
 			fmt.Fprint(os.Stderr, "go get: installing executables with 'go get' in module mode is deprecated.")
 			var altMsg string
 			if modload.HasModRoot() {
@@ -505,7 +506,8 @@ type versionReason struct {
 func newResolver(ctx context.Context, queries []*query) *resolver {
 	// LoadModGraph also sets modload.Target, which is needed by various resolver
 	// methods.
-	mg := modload.LoadModGraph(ctx)
+	const defaultGoVersion = ""
+	mg := modload.LoadModGraph(ctx, defaultGoVersion)
 
 	buildList := mg.BuildList()
 	initialVersion := make(map[string]string, len(buildList))
@@ -1152,6 +1154,7 @@ func (r *resolver) loadPackages(ctx context.Context, patterns []string, findPack
 		Tags:                     imports.AnyTags(),
 		VendorModulesInGOROOTSrc: true,
 		LoadTests:                *getT,
+		AssumeRootsImported:      true, // After 'go get foo', imports of foo should build.
 		SilencePackageErrors:     true, // May be fixed by subsequent upgrades or downgrades.
 	}
 
@@ -1466,6 +1469,8 @@ func (r *resolver) chooseArbitrarily(cs pathSet) (isPackage bool, m module.Versi
 // checkPackageProblems reloads packages for the given patterns and reports
 // missing and ambiguous package errors. It also reports retractions and
 // deprecations for resolved modules and modules needed to build named packages.
+// It also adds a sum for each updated module in the build list if we had one
+// before and didn't get one while loading packages.
 //
 // We skip missing-package errors earlier in the process, since we want to
 // resolve pathSets ourselves, but at that point, we don't have enough context
@@ -1593,12 +1598,55 @@ func (r *resolver) checkPackageProblems(ctx context.Context, pkgPatterns []strin
 		})
 	}
 
+	// Load sums for updated modules that had sums before. When we update a
+	// module, we may update another module in the build list that provides a
+	// package in 'all' that wasn't loaded as part of this 'go get' command.
+	// If we don't add a sum for that module, builds may fail later.
+	// Note that an incidentally updated package could still import packages
+	// from unknown modules or from modules in the build list that we didn't
+	// need previously. We can't handle that case without loading 'all'.
+	sumErrs := make([]error, len(r.buildList))
+	for i := range r.buildList {
+		i := i
+		m := r.buildList[i]
+		mActual := m
+		if mRepl := modload.Replacement(m); mRepl.Path != "" {
+			mActual = mRepl
+		}
+		old := module.Version{Path: m.Path, Version: r.initialVersion[m.Path]}
+		if old.Version == "" {
+			continue
+		}
+		oldActual := old
+		if oldRepl := modload.Replacement(old); oldRepl.Path != "" {
+			oldActual = oldRepl
+		}
+		if mActual == oldActual || mActual.Version == "" || !modfetch.HaveSum(oldActual) {
+			continue
+		}
+		r.work.Add(func() {
+			if _, err := modfetch.DownloadZip(ctx, mActual); err != nil {
+				verb := "upgraded"
+				if semver.Compare(m.Version, old.Version) < 0 {
+					verb = "downgraded"
+				}
+				replaced := ""
+				if mActual != m {
+					replaced = fmt.Sprintf(" (replaced by %s)", mActual)
+				}
+				err = fmt.Errorf("%s %s %s => %s%s: error finding sum for %s: %v", verb, m.Path, old.Version, m.Version, replaced, mActual, err)
+				sumErrs[i] = err
+			}
+		})
+	}
+
 	<-r.work.Idle()
 
-	// Report deprecations, then retractions.
+	// Report deprecations, then retractions, then errors fetching sums.
+	// Only errors fetching sums are hard errors.
 	for _, mm := range deprecations {
 		if mm.message != "" {
-			fmt.Fprintf(os.Stderr, "go: warning: module %s is deprecated: %s\n", mm.m.Path, mm.message)
+			fmt.Fprintf(os.Stderr, "go: module %s is deprecated: %s\n", mm.m.Path, mm.message)
 		}
 	}
 	var retractPath string
@@ -1615,6 +1663,12 @@ func (r *resolver) checkPackageProblems(ctx context.Context, pkgPatterns []strin
 	if retractPath != "" {
 		fmt.Fprintf(os.Stderr, "go: to switch to the latest unretracted version, run:\n\tgo get %s@latest\n", retractPath)
 	}
+	for _, err := range sumErrs {
+		if err != nil {
+			base.Errorf("go: %v", err)
+		}
+	}
+	base.ExitIfErrors()
 }
 
 // reportChanges logs version changes to os.Stderr.
@@ -1750,7 +1804,8 @@ func (r *resolver) updateBuildList(ctx context.Context, additions []module.Versi
 		return false
 	}
 
-	r.buildList = modload.LoadModGraph(ctx).BuildList()
+	const defaultGoVersion = ""
+	r.buildList = modload.LoadModGraph(ctx, defaultGoVersion).BuildList()
 	r.buildListVersion = make(map[string]string, len(r.buildList))
 	for _, m := range r.buildList {
 		r.buildListVersion[m.Path] = m.Version
diff --git a/src/cmd/go/internal/modload/buildlist.go b/src/cmd/go/internal/modload/buildlist.go
index 7a0cea405e..604a57b437 100644
--- a/src/cmd/go/internal/modload/buildlist.go
+++ b/src/cmd/go/internal/modload/buildlist.go
@@ -403,11 +403,33 @@ func (mg *ModuleGraph) allRootsSelected() bool {
 // LoadModGraph loads and returns the graph of module dependencies of the main module,
 // without loading any packages.
 //
+// If the goVersion string is non-empty, the returned graph is the graph
+// as interpreted by the given Go version (instead of the version indicated
+// in the go.mod file).
+//
 // Modules are loaded automatically (and lazily) in LoadPackages:
 // LoadModGraph need only be called if LoadPackages is not,
 // typically in commands that care about modules but no particular package.
-func LoadModGraph(ctx context.Context) *ModuleGraph {
-	rs, mg, err := expandGraph(ctx, LoadModFile(ctx))
+func LoadModGraph(ctx context.Context, goVersion string) *ModuleGraph {
+	rs := LoadModFile(ctx)
+
+	if goVersion != "" {
+		depth := modDepthFromGoVersion(goVersion)
+		if depth == eager && rs.depth != eager {
+			// Use newRequirements instead of convertDepth because convertDepth
+			// also updates roots; here, we want to report the unmodified roots
+			// even though they may seem inconsistent.
+			rs = newRequirements(eager, rs.rootModules, rs.direct)
+		}
+
+		mg, err := rs.Graph(ctx)
+		if err != nil {
+			base.Fatalf("go: %v", err)
+		}
+		return mg
+	}
+
+	rs, mg, err := expandGraph(ctx, rs)
 	if err != nil {
 		base.Fatalf("go: %v", err)
 	}
@@ -443,7 +465,7 @@ func expandGraph(ctx context.Context, rs *Requirements) (*Requirements, *ModuleG
 		// roots — but in a lazy module it may pull in previously-irrelevant
 		// transitive dependencies.
 
-		newRS, rsErr := updateRoots(ctx, rs.direct, rs, nil, nil)
+		newRS, rsErr := updateRoots(ctx, rs.direct, rs, nil, nil, false)
 		if rsErr != nil {
 			// Failed to update roots, perhaps because of an error in a transitive
 			// dependency needed for the update. Return the original Requirements
@@ -517,11 +539,11 @@ func tidyRoots(ctx context.Context, rs *Requirements, pkgs []*loadPkg) (*Require
 	return tidyLazyRoots(ctx, rs.direct, pkgs)
 }
 
-func updateRoots(ctx context.Context, direct map[string]bool, rs *Requirements, pkgs []*loadPkg, add []module.Version) (*Requirements, error) {
+func updateRoots(ctx context.Context, direct map[string]bool, rs *Requirements, pkgs []*loadPkg, add []module.Version, rootsImported bool) (*Requirements, error) {
 	if rs.depth == eager {
 		return updateEagerRoots(ctx, direct, rs, add)
 	}
-	return updateLazyRoots(ctx, direct, rs, pkgs, add)
+	return updateLazyRoots(ctx, direct, rs, pkgs, add, rootsImported)
 }
 
 // tidyLazyRoots returns a minimal set of root requirements that maintains the
@@ -661,7 +683,7 @@ func tidyLazyRoots(ctx context.Context, direct map[string]bool, pkgs []*loadPkg)
 //
 // (See https://golang.org/design/36460-lazy-module-loading#invariants for more
 // detail.)
-func updateLazyRoots(ctx context.Context, direct map[string]bool, rs *Requirements, pkgs []*loadPkg, add []module.Version) (*Requirements, error) {
+func updateLazyRoots(ctx context.Context, direct map[string]bool, rs *Requirements, pkgs []*loadPkg, add []module.Version, rootsImported bool) (*Requirements, error) {
 	roots := rs.rootModules
 	rootsUpgraded := false
 
@@ -688,6 +710,10 @@ func updateLazyRoots(ctx context.Context, direct map[string]bool, rs *Requiremen
 			//
 			// (This is the “import invariant” that makes lazy loading possible.)
 
+		case rootsImported && pkg.flags.has(pkgFromRoot):
+			// pkg is a transitive dependency of some root, and we are treating the
+			// roots as if they are imported by the main module (as in 'go get').
+
 		case pkg.flags.has(pkgIsRoot):
 			// pkg is a root of the package-import graph. (Generally this means that
 			// it matches a command-line argument.) We want future invocations of the
@@ -815,7 +841,8 @@ func updateLazyRoots(ctx context.Context, direct map[string]bool, rs *Requiremen
 
 		roots = make([]module.Version, 0, len(rs.rootModules))
 		rootsUpgraded = false
-		inRootPaths := make(map[string]bool, len(rs.rootModules))
+		inRootPaths := make(map[string]bool, len(rs.rootModules)+1)
+		inRootPaths[Target.Path] = true
 		for _, m := range rs.rootModules {
 			if inRootPaths[m.Path] {
 				// This root specifies a redundant path. We already retained the
diff --git a/src/cmd/go/internal/modload/import.go b/src/cmd/go/internal/modload/import.go
index f76befcfe3..d2bbe5cbe0 100644
--- a/src/cmd/go/internal/modload/import.go
+++ b/src/cmd/go/internal/modload/import.go
@@ -178,11 +178,13 @@ func (e *ImportMissingSumError) Error() string {
 		// Importing package is unknown, or the missing package was named on the
 		// command line. Recommend 'go mod download' for the modules that could
 		// provide the package, since that shouldn't change go.mod.
-		args := make([]string, len(e.mods))
-		for i, mod := range e.mods {
-			args[i] = mod.Path
+		if len(e.mods) > 0 {
+			args := make([]string, len(e.mods))
+			for i, mod := range e.mods {
+				args[i] = mod.Path
+			}
+			hint = fmt.Sprintf("; to add:\n\tgo mod download %s", strings.Join(args, " "))
 		}
-		hint = fmt.Sprintf("; to add:\n\tgo mod download %s", strings.Join(args, " "))
 	} else {
 		// Importing package is known (common case). Recommend 'go get' on the
 		// current version of the importing package.
@@ -426,6 +428,15 @@ func queryImport(ctx context.Context, path string, rs *Requirements) (module.Ver
 					mv = module.ZeroPseudoVersion("v0")
 				}
 			}
+			mg, err := rs.Graph(ctx)
+			if err != nil {
+				return module.Version{}, err
+			}
+			if cmpVersion(mg.Selected(mp), mv) >= 0 {
+				// We can't resolve the import by adding mp@mv to the module graph,
+				// because the selected version of mp is already at least mv.
+				continue
+			}
 			mods = append(mods, module.Version{Path: mp, Version: mv})
 		}
 
diff --git a/src/cmd/go/internal/modload/init.go b/src/cmd/go/internal/modload/init.go
index 5cdea12cd3..a8cbd9fe16 100644
--- a/src/cmd/go/internal/modload/init.go
+++ b/src/cmd/go/internal/modload/init.go
@@ -71,7 +71,7 @@ type Root int
 const (
 	// AutoRoot is the default for most commands. modload.Init will look for
 	// a go.mod file in the current directory or any parent. If none is found,
-	// modules may be disabled (GO111MODULE=on) or commands may run in a
+	// modules may be disabled (GO111MODULE=auto) or commands may run in a
 	// limited module mode.
 	AutoRoot Root = iota
 
@@ -405,14 +405,23 @@ func loadModFile(ctx context.Context) (rs *Requirements, needCommit bool) {
 	if modRoot == "" {
 		Target = module.Version{Path: "command-line-arguments"}
 		targetPrefix = "command-line-arguments"
-		goVersion := latestGoVersion()
+		goVersion := LatestGoVersion()
 		rawGoVersion.Store(Target, goVersion)
 		requirements = newRequirements(modDepthFromGoVersion(goVersion), nil, nil)
 		return requirements, false
 	}
 
 	gomod := ModFilePath()
-	data, err := lockedfile.Read(gomod)
+	var data []byte
+	var err error
+	if gomodActual, ok := fsys.OverlayPath(gomod); ok {
+		// Don't lock go.mod if it's part of the overlay.
+		// On Plan 9, locking requires chmod, and we don't want to modify any file
+		// in the overlay. See #44700.
+		data, err = os.ReadFile(gomodActual)
+	} else {
+		data, err = lockedfile.Read(gomodActual)
+	}
 	if err != nil {
 		base.Fatalf("go: %v", err)
 	}
@@ -432,7 +441,10 @@ func loadModFile(ctx context.Context) (rs *Requirements, needCommit bool) {
 	initTarget(f.Module.Mod)
 	index = indexModFile(data, f, fixed)
 
-	if err := checkModulePathLax(f.Module.Mod.Path); err != nil {
+	if err := module.CheckImportPath(f.Module.Mod.Path); err != nil {
+		if pathErr, ok := err.(*module.InvalidPathError); ok {
+			pathErr.Kind = "module"
+		}
 		base.Fatalf("go: %v", err)
 	}
 
@@ -448,7 +460,7 @@ func loadModFile(ctx context.Context) (rs *Requirements, needCommit bool) {
 		// TODO(#45551): Do something more principled instead of checking
 		// cfg.CmdName directly here.
 		if cfg.BuildMod == "mod" && cfg.CmdName != "mod graph" && cfg.CmdName != "mod why" {
-			addGoStmt(latestGoVersion())
+			addGoStmt(LatestGoVersion())
 			if go117EnableLazyLoading {
 				// We need to add a 'go' version to the go.mod file, but we must assume
 				// that its existing contents match something between Go 1.11 and 1.16.
@@ -492,7 +504,15 @@ func CreateModFile(ctx context.Context, modPath string) {
 		if err != nil {
 			base.Fatalf("go: %v", err)
 		}
-	} else if err := checkModulePathLax(modPath); err != nil {
+	} else if err := module.CheckImportPath(modPath); err != nil {
+		if pathErr, ok := err.(*module.InvalidPathError); ok {
+			pathErr.Kind = "module"
+			// Same as build.IsLocalPath()
+			if pathErr.Path == "." || pathErr.Path == ".." ||
+				strings.HasPrefix(pathErr.Path, "./") || strings.HasPrefix(pathErr.Path, "../") {
+				pathErr.Err = errors.New("is a local import path")
+			}
+		}
 		base.Fatalf("go: %v", err)
 	}
 
@@ -500,7 +520,7 @@ func CreateModFile(ctx context.Context, modPath string) {
 	modFile = new(modfile.File)
 	modFile.AddModuleStmt(modPath)
 	initTarget(modFile.Module.Mod)
-	addGoStmt(latestGoVersion()) // Add the go directive before converted module requirements.
+	addGoStmt(LatestGoVersion()) // Add the go directive before converted module requirements.
 
 	convertedFrom, err := convertLegacyConfig(modPath)
 	if convertedFrom != "" {
@@ -536,49 +556,6 @@ func CreateModFile(ctx context.Context, modPath string) {
 	}
 }
 
-// checkModulePathLax checks that the path meets some minimum requirements
-// to avoid confusing users or the module cache. The requirements are weaker
-// than those of module.CheckPath to allow room for weakening module path
-// requirements in the future, but strong enough to help users avoid significant
-// problems.
-func checkModulePathLax(p string) error {
-	// TODO(matloob): Replace calls of this function in this CL with calls
-	// to module.CheckImportPath once it's been laxened, if it becomes laxened.
-	// See golang.org/issue/29101 for a discussion about whether to make CheckImportPath
-	// more lax or more strict.
-
-	errorf := func(format string, args ...interface{}) error {
-		return fmt.Errorf("invalid module path %q: %s", p, fmt.Sprintf(format, args...))
-	}
-
-	// Disallow shell characters " ' * < > ? ` | to avoid triggering bugs
-	// with file systems and subcommands. Disallow file path separators : and \
-	// because path separators other than / will confuse the module cache.
-	// See fileNameOK in golang.org/x/mod/module/module.go.
-	shellChars := "`" + `"'*<>?|`
-	fsChars := `\:`
-	if i := strings.IndexAny(p, shellChars); i >= 0 {
-		return errorf("contains disallowed shell character %q", p[i])
-	}
-	if i := strings.IndexAny(p, fsChars); i >= 0 {
-		return errorf("contains disallowed path separator character %q", p[i])
-	}
-
-	// Ensure path.IsAbs and build.IsLocalImport are false, and that the path is
-	// invariant under path.Clean, also to avoid confusing the module cache.
-	if path.IsAbs(p) {
-		return errorf("is an absolute path")
-	}
-	if build.IsLocalImport(p) {
-		return errorf("is a local import path")
-	}
-	if path.Clean(p) != p {
-		return errorf("is not clean")
-	}
-
-	return nil
-}
-
 // fixVersion returns a modfile.VersionFixer implemented using the Query function.
 //
 // It resolves commit hashes and branch names to versions,
@@ -693,7 +670,7 @@ func requirementsFromModFile(ctx context.Context) *Requirements {
 	for _, n := range mPathCount {
 		if n > 1 {
 			var err error
-			rs, err = updateRoots(ctx, rs.direct, rs, nil, nil)
+			rs, err = updateRoots(ctx, rs.direct, rs, nil, nil, false)
 			if err != nil {
 				base.Fatalf("go: %v", err)
 			}
@@ -793,17 +770,39 @@ func addGoStmt(v string) {
 	rawGoVersion.Store(Target, v)
 }
 
-// latestGoVersion returns the latest version of the Go language supported by
+// LatestGoVersion returns the latest version of the Go language supported by
 // this toolchain, like "1.17".
-func latestGoVersion() string {
+func LatestGoVersion() string {
 	tags := build.Default.ReleaseTags
 	version := tags[len(tags)-1]
 	if !strings.HasPrefix(version, "go") || !modfile.GoVersionRE.MatchString(version[2:]) {
-		base.Fatalf("go: unrecognized default version %q", version)
+		base.Fatalf("go: internal error: unrecognized default version %q", version)
 	}
 	return version[2:]
 }
 
+// priorGoVersion returns the Go major release immediately preceding v,
+// or v itself if v is the first Go major release (1.0) or not a supported
+// Go version.
+func priorGoVersion(v string) string {
+	vTag := "go" + v
+	tags := build.Default.ReleaseTags
+	for i, tag := range tags {
+		if tag == vTag {
+			if i == 0 {
+				return v
+			}
+
+			version := tags[i-1]
+			if !strings.HasPrefix(version, "go") || !modfile.GoVersionRE.MatchString(version[2:]) {
+				base.Fatalf("go: internal error: unrecognized version %q", version)
+			}
+			return version[2:]
+		}
+	}
+	return v
+}
+
 var altConfigs = []string{
 	"Gopkg.lock",
 
@@ -918,14 +917,8 @@ func findModulePath(dir string) (string, error) {
 		}
 		if rel := search.InDir(dir, filepath.Join(gpdir, "src")); rel != "" && rel != "." {
 			path := filepath.ToSlash(rel)
-			// TODO(matloob): replace this with module.CheckImportPath
-			// once it's been laxened.
-			// Only checkModulePathLax here. There are some unpublishable
-			// module names that are compatible with checkModulePathLax
-			// but they already work in GOPATH so don't break users
-			// trying to do a build with modules. gorelease will alert users
-			// publishing their modules to fix their paths.
-			if err := checkModulePathLax(path); err != nil {
+			// gorelease will alert users publishing their modules to fix their paths.
+			if err := module.CheckImportPath(path); err != nil {
 				badPathErr = err
 				break
 			}
@@ -1015,10 +1008,14 @@ func commitRequirements(ctx context.Context, goVersion string, rs *Requirements)
 			Indirect: !rs.direct[m.Path],
 		})
 	}
-	modFile.SetRequire(list)
 	if goVersion != "" {
 		modFile.AddGoStmt(goVersion)
 	}
+	if semver.Compare("v"+modFileGoVersion(), separateIndirectVersionV) < 0 {
+		modFile.SetRequire(list)
+	} else {
+		modFile.SetRequireSeparateIndirect(list)
+	}
 	modFile.Cleanup()
 
 	dirty := index.modFileIsDirty(modFile)
@@ -1038,6 +1035,13 @@ func commitRequirements(ctx context.Context, goVersion string, rs *Requirements)
 		}
 		return
 	}
+	gomod := ModFilePath()
+	if _, ok := fsys.OverlayPath(gomod); ok {
+		if dirty {
+			base.Fatalf("go: updates to go.mod needed, but go.mod is part of the overlay specified with -overlay")
+		}
+		return
+	}
 
 	new, err := modFile.Format()
 	if err != nil {
@@ -1138,12 +1142,11 @@ func keepSums(ctx context.Context, ld *loader, rs *Requirements, which whichSums
 		}
 	}
 
-	if rs.depth == lazy && rs.graph.Load() == nil {
-		// The main module is lazy and we haven't needed to load the module graph so
-		// far. Don't incur the cost of loading it now — since we haven't loaded the
-		// graph, we probably don't have any checksums to contribute to the distant
-		// parts of the graph anyway. Instead, just request sums for the roots that
-		// we know about.
+	if rs.graph.Load() == nil {
+		// The module graph was not loaded, possibly because the main module is lazy
+		// or possibly because we haven't needed to load the graph yet.
+		// Save sums for the root modules (or their replacements), but don't
+		// incur the cost of loading the graph just to find and retain the sums.
 		for _, m := range rs.rootModules {
 			r := resolveReplacement(m)
 			keep[modkey(r)] = true
diff --git a/src/cmd/go/internal/modload/load.go b/src/cmd/go/internal/modload/load.go
index f30ac6e0c8..bce9ad85f4 100644
--- a/src/cmd/go/internal/modload/load.go
+++ b/src/cmd/go/internal/modload/load.go
@@ -152,6 +152,13 @@ type PackageOpts struct {
 	// packages.
 	Tidy bool
 
+	// TidyCompatibleVersion is the oldest Go version that must be able to
+	// reproducibly reload the requested packages.
+	//
+	// If empty, the compatible version is the Go version immediately prior to the
+	// 'go' version listed in the go.mod file.
+	TidyCompatibleVersion string
+
 	// VendorModulesInGOROOTSrc indicates that if we are within a module in
 	// GOROOT/src, packages in the module's vendor directory should be resolved as
 	// actual module dependencies (instead of standard-library packages).
@@ -164,6 +171,11 @@ type PackageOpts struct {
 	// if the flag is set to "readonly" (the default) or "vendor".
 	ResolveMissingImports bool
 
+	// AssumeRootsImported indicates that the transitive dependencies of the root
+	// packages should be treated as if those roots will be imported by the main
+	// module.
+	AssumeRootsImported bool
+
 	// AllowPackage, if non-nil, is called after identifying the module providing
 	// each package. If AllowPackage returns a non-nil error, that error is set
 	// for the package, and the imports and test of that package will not be
@@ -314,10 +326,6 @@ func LoadPackages(ctx context.Context, opts PackageOpts, patterns ...string) (ma
 
 	initialRS, _ := loadModFile(ctx) // Ignore needCommit — we're going to commit at the end regardless.
 
-	if opts.GoVersion == "" {
-		opts.GoVersion = modFileGoVersion()
-	}
-
 	ld := loadFromRoots(ctx, loaderParams{
 		PackageOpts:  opts,
 		requirements: initialRS,
@@ -375,12 +383,31 @@ func LoadPackages(ctx context.Context, opts PackageOpts, patterns ...string) (ma
 			}
 		}
 
-		modfetch.TrimGoSum(keepSums(ctx, ld, ld.requirements, loadedZipSumsOnly))
+		keep := keepSums(ctx, ld, ld.requirements, loadedZipSumsOnly)
+		if compatDepth := modDepthFromGoVersion(ld.TidyCompatibleVersion); compatDepth != ld.requirements.depth {
+			compatRS := newRequirements(compatDepth, ld.requirements.rootModules, ld.requirements.direct)
+			ld.checkTidyCompatibility(ctx, compatRS)
+
+			for m := range keepSums(ctx, ld, compatRS, loadedZipSumsOnly) {
+				keep[m] = true
+			}
+		}
+
+		if allowWriteGoMod {
+			modfetch.TrimGoSum(keep)
+
+			// commitRequirements below will also call WriteGoSum, but the "keep" map
+			// we have here could be strictly larger: commitRequirements only commits
+			// loaded.requirements, but here we may have also loaded (and want to
+			// preserve checksums for) additional entities from compatRS, which are
+			// only needed for compatibility with ld.TidyCompatibleVersion.
+			modfetch.WriteGoSum(keep)
+		}
 	}
 
 	// Success! Update go.mod and go.sum (if needed) and return the results.
 	loaded = ld
-	commitRequirements(ctx, opts.GoVersion, loaded.requirements)
+	commitRequirements(ctx, loaded.GoVersion, loaded.requirements)
 
 	for _, pkg := range ld.pkgs {
 		if !pkg.isTest() {
@@ -605,10 +632,8 @@ func ImportFromFiles(ctx context.Context, gofiles []string) {
 		base.Fatalf("go: %v", err)
 	}
 
-	goVersion := modFileGoVersion()
 	loaded = loadFromRoots(ctx, loaderParams{
 		PackageOpts: PackageOpts{
-			GoVersion:             goVersion,
 			Tags:                  tags,
 			ResolveMissingImports: true,
 			SilencePackageErrors:  true,
@@ -620,7 +645,7 @@ func ImportFromFiles(ctx context.Context, gofiles []string) {
 			return roots
 		},
 	})
-	commitRequirements(ctx, goVersion, loaded.requirements)
+	commitRequirements(ctx, loaded.GoVersion, loaded.requirements)
 }
 
 // DirImportPath returns the effective import path for dir,
@@ -650,20 +675,6 @@ func DirImportPath(ctx context.Context, dir string) string {
 	return "."
 }
 
-// TargetPackages returns the list of packages in the target (top-level) module
-// matching pattern, which may be relative to the working directory, under all
-// build tag settings.
-func TargetPackages(ctx context.Context, pattern string) *search.Match {
-	// TargetPackages is relative to the main module, so ensure that the main
-	// module is a thing that can contain packages.
-	LoadModFile(ctx) // Sets Target.
-	ModRoot()        // Emits an error if Target cannot contain packages.
-
-	m := search.NewMatch(pattern)
-	matchPackages(ctx, m, imports.AnyTags(), omitStd, []module.Version{Target})
-	return m
-}
-
 // ImportMap returns the actual package import path
 // for an import path found in source code.
 // If the given import path does not appear in the source code
@@ -695,29 +706,6 @@ func PackageModule(path string) module.Version {
 	return pkg.mod
 }
 
-// PackageImports returns the imports for the package named by the import path.
-// Test imports will be returned as well if tests were loaded for the package
-// (i.e., if "all" was loaded or if LoadTests was set and the path was matched
-// by a command line argument). PackageImports will return nil for
-// unknown package paths.
-func PackageImports(path string) (imports, testImports []string) {
-	pkg, ok := loaded.pkgCache.Get(path).(*loadPkg)
-	if !ok {
-		return nil, nil
-	}
-	imports = make([]string, len(pkg.imports))
-	for i, p := range pkg.imports {
-		imports[i] = p.path
-	}
-	if pkg.test != nil {
-		testImports = make([]string, len(pkg.test.imports))
-		for i, p := range pkg.test.imports {
-			testImports[i] = p.path
-		}
-	}
-	return imports, testImports
-}
-
 // Lookup returns the source directory, import path, and any loading error for
 // the package at path as imported from the package in parentDir.
 // Lookup requires that one of the Load functions in this package has already
@@ -855,6 +843,11 @@ const (
 	// are also roots (and must be marked pkgIsRoot).
 	pkgIsRoot
 
+	// pkgFromRoot indicates that the package is in the transitive closure of
+	// imports starting at the roots. (Note that every package marked as pkgIsRoot
+	// is also trivially marked pkgFromRoot.)
+	pkgFromRoot
+
 	// pkgImportsLoaded indicates that the imports and testImports fields of a
 	// loadPkg have been populated.
 	pkgImportsLoaded
@@ -921,22 +914,38 @@ func loadFromRoots(ctx context.Context, params loaderParams) *loader {
 		work:         par.NewQueue(runtime.GOMAXPROCS(0)),
 	}
 
-	if params.GoVersion != "" {
-		if semver.Compare("v"+params.GoVersion, narrowAllVersionV) < 0 && !ld.UseVendorAll {
-			// The module's go version explicitly predates the change in "all" for lazy
-			// loading, so continue to use the older interpretation.
-			// (If params.GoVersion is empty, we are probably not in any module at all
-			// and should use the latest semantics.)
-			ld.allClosesOverTests = true
-		}
+	if ld.GoVersion == "" {
+		ld.GoVersion = modFileGoVersion()
 
-		var err error
-		ld.requirements, err = convertDepth(ctx, ld.requirements, modDepthFromGoVersion(params.GoVersion))
-		if err != nil {
-			ld.errorf("go: %v\n", err)
+		if ld.Tidy && semver.Compare("v"+ld.GoVersion, "v"+LatestGoVersion()) > 0 {
+			ld.errorf("go mod tidy: go.mod file indicates go %s, but maximum supported version is %s\n", ld.GoVersion, LatestGoVersion())
+			base.ExitIfErrors()
 		}
 	}
 
+	if ld.Tidy {
+		if ld.TidyCompatibleVersion == "" {
+			ld.TidyCompatibleVersion = priorGoVersion(ld.GoVersion)
+		} else if semver.Compare("v"+ld.TidyCompatibleVersion, "v"+ld.GoVersion) > 0 {
+			// Each version of the Go toolchain knows how to interpret go.mod and
+			// go.sum files produced by all previous versions, so a compatibility
+			// version higher than the go.mod version adds nothing.
+			ld.TidyCompatibleVersion = ld.GoVersion
+		}
+	}
+
+	if semver.Compare("v"+ld.GoVersion, narrowAllVersionV) < 0 && !ld.UseVendorAll {
+		// The module's go version explicitly predates the change in "all" for lazy
+		// loading, so continue to use the older interpretation.
+		ld.allClosesOverTests = true
+	}
+
+	var err error
+	ld.requirements, err = convertDepth(ctx, ld.requirements, modDepthFromGoVersion(ld.GoVersion))
+	if err != nil {
+		ld.errorf("go: %v\n", err)
+	}
+
 	if ld.requirements.depth == eager {
 		var err error
 		ld.requirements, _, err = expandGraph(ctx, ld.requirements)
@@ -1032,7 +1041,7 @@ func loadFromRoots(ctx context.Context, params loaderParams) *loader {
 		// iteration so we don't need to also update it here. (That would waste time
 		// computing a "direct" map that we'll have to recompute later anyway.)
 		direct := ld.requirements.direct
-		rs, err := updateRoots(ctx, direct, ld.requirements, noPkgs, toAdd)
+		rs, err := updateRoots(ctx, direct, ld.requirements, noPkgs, toAdd, ld.AssumeRootsImported)
 		if err != nil {
 			// If an error was found in a newly added module, report the package
 			// import stack instead of the module requirement stack. Packages
@@ -1073,7 +1082,7 @@ func loadFromRoots(ctx context.Context, params loaderParams) *loader {
 			// If that is not the case, there is a bug in the loading loop above.
 			for _, m := range rs.rootModules {
 				if v, ok := ld.requirements.rootSelected(m.Path); !ok || v != m.Version {
-					ld.errorf("go: internal error: a requirement on %v is needed but was not added during package loading\n", m)
+					ld.errorf("go mod tidy: internal error: a requirement on %v is needed but was not added during package loading\n", m)
 					base.ExitIfErrors()
 				}
 			}
@@ -1238,7 +1247,7 @@ func (ld *loader) updateRequirements(ctx context.Context) (changed bool, err err
 		addRoots = tidy.rootModules
 	}
 
-	rs, err = updateRoots(ctx, direct, rs, ld.pkgs, addRoots)
+	rs, err = updateRoots(ctx, direct, rs, ld.pkgs, addRoots, ld.AssumeRootsImported)
 	if err != nil {
 		// We don't actually know what even the root requirements are supposed to be,
 		// so we can't proceed with loading. Return the error to the caller
@@ -1397,6 +1406,9 @@ func (ld *loader) applyPkgFlags(ctx context.Context, pkg *loadPkg, flags loadPkg
 		// This package matches a root pattern by virtue of being in "all".
 		flags |= pkgIsRoot
 	}
+	if flags.has(pkgIsRoot) {
+		flags |= pkgFromRoot
+	}
 
 	old := pkg.flags.update(flags)
 	new := old | flags
@@ -1451,6 +1463,12 @@ func (ld *loader) applyPkgFlags(ctx context.Context, pkg *loadPkg, flags loadPkg
 			ld.applyPkgFlags(ctx, dep, pkgInAll)
 		}
 	}
+
+	if new.has(pkgFromRoot) && !old.has(pkgFromRoot|pkgImportsLoaded) {
+		for _, dep := range pkg.imports {
+			ld.applyPkgFlags(ctx, dep, pkgFromRoot)
+		}
+	}
 }
 
 // preloadRootModules loads the module requirements needed to identify the
@@ -1513,7 +1531,7 @@ func (ld *loader) preloadRootModules(ctx context.Context, rootPkgs []string) (ch
 	}
 	module.Sort(toAdd)
 
-	rs, err := updateRoots(ctx, ld.requirements.direct, ld.requirements, nil, toAdd)
+	rs, err := updateRoots(ctx, ld.requirements.direct, ld.requirements, nil, toAdd, ld.AssumeRootsImported)
 	if err != nil {
 		// We are missing some root dependency, and for some reason we can't load
 		// enough of the module dependency graph to add the missing root. Package
@@ -1744,6 +1762,219 @@ func (ld *loader) checkMultiplePaths() {
 	}
 }
 
+// checkTidyCompatibility emits an error if any package would be loaded from a
+// different module under rs than under ld.requirements.
+func (ld *loader) checkTidyCompatibility(ctx context.Context, rs *Requirements) {
+	suggestUpgrade := false
+	suggestEFlag := false
+	suggestFixes := func() {
+		if ld.AllowErrors {
+			// The user is explicitly ignoring these errors, so don't bother them with
+			// other options.
+			return
+		}
+
+		// We print directly to os.Stderr because this information is advice about
+		// how to fix errors, not actually an error itself.
+		// (The actual errors should have been logged already.)
+
+		fmt.Fprintln(os.Stderr)
+
+		goFlag := ""
+		if ld.GoVersion != modFileGoVersion() {
+			goFlag = " -go=" + ld.GoVersion
+		}
+
+		compatFlag := ""
+		if ld.TidyCompatibleVersion != priorGoVersion(ld.GoVersion) {
+			compatFlag = " -compat=" + ld.TidyCompatibleVersion
+		}
+		if suggestUpgrade {
+			eDesc := ""
+			eFlag := ""
+			if suggestEFlag {
+				eDesc = ", leaving some packages unresolved"
+				eFlag = " -e"
+			}
+			fmt.Fprintf(os.Stderr, "To upgrade to the versions selected by go %s%s:\n\tgo mod tidy%s -go=%s && go mod tidy%s -go=%s%s\n", ld.TidyCompatibleVersion, eDesc, eFlag, ld.TidyCompatibleVersion, eFlag, ld.GoVersion, compatFlag)
+		} else if suggestEFlag {
+			// If some packages are missing but no package is upgraded, then we
+			// shouldn't suggest upgrading to the Go 1.16 versions explicitly — that
+			// wouldn't actually fix anything for Go 1.16 users, and *would* break
+			// something for Go 1.17 users.
+			fmt.Fprintf(os.Stderr, "To proceed despite packages unresolved in go %s:\n\tgo mod tidy -e%s%s\n", ld.TidyCompatibleVersion, goFlag, compatFlag)
+		}
+
+		fmt.Fprintf(os.Stderr, "If reproducibility with go %s is not needed:\n\tgo mod tidy%s -compat=%s\n", ld.TidyCompatibleVersion, goFlag, ld.GoVersion)
+
+		// TODO(#46141): Populate the linked wiki page.
+		fmt.Fprintf(os.Stderr, "For other options, see:\n\thttps://golang.org/doc/modules/pruning\n")
+	}
+
+	mg, err := rs.Graph(ctx)
+	if err != nil {
+		ld.errorf("go mod tidy: error loading go %s module graph: %v\n", ld.TidyCompatibleVersion, err)
+		suggestFixes()
+		return
+	}
+
+	// Re-resolve packages in parallel.
+	//
+	// We re-resolve each package — rather than just checking versions — to ensure
+	// that we have fetched module source code (and, importantly, checksums for
+	// that source code) for all modules that are necessary to ensure that imports
+	// are unambiguous. That also produces clearer diagnostics, since we can say
+	// exactly what happened to the package if it became ambiguous or disappeared
+	// entirely.
+	//
+	// We re-resolve the packages in parallel because this process involves disk
+	// I/O to check for package sources, and because the process of checking for
+	// ambiguous imports may require us to download additional modules that are
+	// otherwise pruned out in Go 1.17 — we don't want to block progress on other
+	// packages while we wait for a single new download.
+	type mismatch struct {
+		mod module.Version
+		err error
+	}
+	mismatchMu := make(chan map[*loadPkg]mismatch, 1)
+	mismatchMu <- map[*loadPkg]mismatch{}
+	for _, pkg := range ld.pkgs {
+		if pkg.mod.Path == "" && pkg.err == nil {
+			// This package is from the standard library (which does not vary based on
+			// the module graph).
+			continue
+		}
+
+		pkg := pkg
+		ld.work.Add(func() {
+			mod, _, err := importFromModules(ctx, pkg.path, rs, mg)
+			if mod != pkg.mod {
+				mismatches := <-mismatchMu
+				mismatches[pkg] = mismatch{mod: mod, err: err}
+				mismatchMu <- mismatches
+			}
+		})
+	}
+	<-ld.work.Idle()
+
+	mismatches := <-mismatchMu
+	if len(mismatches) == 0 {
+		// Since we're running as part of 'go mod tidy', the roots of the module
+		// graph should contain only modules that are relevant to some package in
+		// the package graph. We checked every package in the package graph and
+		// didn't find any mismatches, so that must mean that all of the roots of
+		// the module graph are also consistent.
+		//
+		// If we're wrong, Go 1.16 in -mod=readonly mode will error out with
+		// "updates to go.mod needed", which would be very confusing. So instead,
+		// we'll double-check that our reasoning above actually holds — if it
+		// doesn't, we'll emit an internal error and hopefully the user will report
+		// it as a bug.
+		for _, m := range ld.requirements.rootModules {
+			if v := mg.Selected(m.Path); v != m.Version {
+				fmt.Fprintln(os.Stderr)
+				base.Fatalf("go: internal error: failed to diagnose selected-version mismatch for module %s: go %s selects %s, but go %s selects %s\n\tPlease report this at https://golang.org/issue.", m.Path, ld.GoVersion, m.Version, ld.TidyCompatibleVersion, v)
+			}
+		}
+		return
+	}
+
+	// Iterate over the packages (instead of the mismatches map) to emit errors in
+	// deterministic order.
+	for _, pkg := range ld.pkgs {
+		mismatch, ok := mismatches[pkg]
+		if !ok {
+			continue
+		}
+
+		if pkg.isTest() {
+			// We already did (or will) report an error for the package itself,
+			// so don't report a duplicate (and more vebose) error for its test.
+			if _, ok := mismatches[pkg.testOf]; !ok {
+				base.Fatalf("go: internal error: mismatch recorded for test %s, but not its non-test package", pkg.path)
+			}
+			continue
+		}
+
+		switch {
+		case mismatch.err != nil:
+			// pkg resolved successfully, but errors out using the requirements in rs.
+			//
+			// This could occur because the import is provided by a single lazy root
+			// (and is thus unambiguous in lazy mode) and also one or more
+			// transitive dependencies (and is ambiguous in eager mode).
+			//
+			// It could also occur because some transitive dependency upgrades the
+			// module that previously provided the package to a version that no
+			// longer does, or to a version for which the module source code (but
+			// not the go.mod file in isolation) has a checksum error.
+			if missing := (*ImportMissingError)(nil); errors.As(mismatch.err, &missing) {
+				selected := module.Version{
+					Path:    pkg.mod.Path,
+					Version: mg.Selected(pkg.mod.Path),
+				}
+				ld.errorf("%s loaded from %v,\n\tbut go %s would fail to locate it in %s\n", pkg.stackText(), pkg.mod, ld.TidyCompatibleVersion, selected)
+			} else {
+				if ambiguous := (*AmbiguousImportError)(nil); errors.As(mismatch.err, &ambiguous) {
+					// TODO: Is this check needed?
+				}
+				ld.errorf("%s loaded from %v,\n\tbut go %s would fail to locate it:\n\t%v\n", pkg.stackText(), pkg.mod, ld.TidyCompatibleVersion, mismatch.err)
+			}
+
+			suggestEFlag = true
+
+			// Even if we press ahead with the '-e' flag, the older version will
+			// error out in readonly mode if it thinks the go.mod file contains
+			// any *explicit* dependency that is not at its selected version,
+			// even if that dependency is not relevant to any package being loaded.
+			//
+			// We check for that condition here. If all of the roots are consistent
+			// the '-e' flag suffices, but otherwise we need to suggest an upgrade.
+			if !suggestUpgrade {
+				for _, m := range ld.requirements.rootModules {
+					if v := mg.Selected(m.Path); v != m.Version {
+						suggestUpgrade = true
+						break
+					}
+				}
+			}
+
+		case pkg.err != nil:
+			// pkg had an error in lazy mode (presumably suppressed with the -e flag),
+			// but not in eager mode.
+			//
+			// This is possible, if, say, the import is unresolved in lazy mode
+			// (because the "latest" version of each candidate module either is
+			// unavailable or does not contain the package), but is resolved in
+			// eager mode due to a newer-than-latest dependency that is normally
+			// runed out of the module graph.
+			//
+			// This could also occur if the source code for the module providing the
+			// package in lazy mode has a checksum error, but eager mode upgrades
+			// that module to a version with a correct checksum.
+			//
+			// pkg.err should have already been logged elsewhere — along with a
+			// stack trace — so log only the import path and non-error info here.
+			suggestUpgrade = true
+			ld.errorf("%s failed to load from any module,\n\tbut go %s would load it from %v\n", pkg.path, ld.TidyCompatibleVersion, mismatch.mod)
+
+		case pkg.mod != mismatch.mod:
+			// The package is loaded successfully by both Go versions, but from a
+			// different module in each. This could lead to subtle (and perhaps even
+			// unnoticed!) variations in behavior between builds with different
+			// toolchains.
+			suggestUpgrade = true
+			ld.errorf("%s loaded from %v,\n\tbut go %s would select %v\n", pkg.stackText(), pkg.mod, ld.TidyCompatibleVersion, mismatch.mod.Version)
+
+		default:
+			base.Fatalf("go: internal error: mismatch recorded for package %s, but no differences found", pkg.path)
+		}
+	}
+
+	suggestFixes()
+	base.ExitIfErrors()
+}
+
 // scanDir is like imports.ScanDir but elides known magic imports from the list,
 // so that we do not go looking for packages that don't really exist.
 //
diff --git a/src/cmd/go/internal/modload/modfile.go b/src/cmd/go/internal/modload/modfile.go
index bafff3e080..03e02e73b6 100644
--- a/src/cmd/go/internal/modload/modfile.go
+++ b/src/cmd/go/internal/modload/modfile.go
@@ -8,6 +8,7 @@ import (
 	"context"
 	"errors"
 	"fmt"
+	"os"
 	"path/filepath"
 	"strings"
 	"sync"
@@ -15,6 +16,7 @@ import (
 
 	"cmd/go/internal/base"
 	"cmd/go/internal/cfg"
+	"cmd/go/internal/fsys"
 	"cmd/go/internal/lockedfile"
 	"cmd/go/internal/modfetch"
 	"cmd/go/internal/par"
@@ -35,6 +37,11 @@ const (
 	// module's go.mod file is expected to list explicit requirements on every
 	// module that provides any package transitively imported by that module.
 	lazyLoadingVersionV = "v1.17"
+
+	// separateIndirectVersionV is the Go version (plus leading "v") at which
+	// "// indirect" dependencies are added in a block separate from the direct
+	// ones. See https://golang.org/issue/45965.
+	separateIndirectVersionV = "v1.17"
 )
 
 const (
@@ -55,7 +62,7 @@ var modFile *modfile.File
 // in modFile are intepreted, or the latest Go version if modFile is nil.
 func modFileGoVersion() string {
 	if modFile == nil {
-		return latestGoVersion()
+		return LatestGoVersion()
 	}
 	if modFile.Go == nil || modFile.Go.Version == "" {
 		// The main module necessarily has a go.mod file, and that file lacks a
@@ -588,39 +595,14 @@ func rawGoModSummary(m module.Version) (*modFileSummary, error) {
 	}
 	c := rawGoModSummaryCache.Do(m, func() interface{} {
 		summary := new(modFileSummary)
-		var f *modfile.File
-		if m.Version == "" {
-			// m is a replacement module with only a file path.
-			dir := m.Path
-			if !filepath.IsAbs(dir) {
-				dir = filepath.Join(ModRoot(), dir)
-			}
-			gomod := filepath.Join(dir, "go.mod")
-
-			data, err := lockedfile.Read(gomod)
-			if err != nil {
-				return cached{nil, module.VersionError(m, fmt.Errorf("reading %s: %v", base.ShortPath(gomod), err))}
-			}
-			f, err = modfile.ParseLax(gomod, data, nil)
-			if err != nil {
-				return cached{nil, module.VersionError(m, fmt.Errorf("parsing %s: %v", base.ShortPath(gomod), err))}
-			}
-		} else {
-			if !semver.IsValid(m.Version) {
-				// Disallow the broader queries supported by fetch.Lookup.
-				base.Fatalf("go: internal error: %s@%s: unexpected invalid semantic version", m.Path, m.Version)
-			}
-
-			data, err := modfetch.GoMod(m.Path, m.Version)
-			if err != nil {
-				return cached{nil, err}
-			}
-			f, err = modfile.ParseLax("go.mod", data, nil)
-			if err != nil {
-				return cached{nil, module.VersionError(m, fmt.Errorf("parsing go.mod: %v", err))}
-			}
+		name, data, err := rawGoModData(m)
+		if err != nil {
+			return cached{nil, err}
+		}
+		f, err := modfile.ParseLax(name, data, nil)
+		if err != nil {
+			return cached{nil, module.VersionError(m, fmt.Errorf("parsing %s: %v", base.ShortPath(name), err))}
 		}
-
 		if f.Module != nil {
 			summary.module = f.Module.Mod
 			summary.deprecated = f.Module.Deprecated
@@ -656,6 +638,43 @@ func rawGoModSummary(m module.Version) (*modFileSummary, error) {
 
 var rawGoModSummaryCache par.Cache // module.Version → rawGoModSummary result
 
+// rawGoModData returns the content of the go.mod file for module m, ignoring
+// all replacements that may apply to m.
+//
+// rawGoModData cannot be used on the Target module.
+//
+// Unlike rawGoModSummary, rawGoModData does not cache its results in memory.
+// Use rawGoModSummary instead unless you specifically need these bytes.
+func rawGoModData(m module.Version) (name string, data []byte, err error) {
+	if m.Version == "" {
+		// m is a replacement module with only a file path.
+		dir := m.Path
+		if !filepath.IsAbs(dir) {
+			dir = filepath.Join(ModRoot(), dir)
+		}
+		name = filepath.Join(dir, "go.mod")
+		if gomodActual, ok := fsys.OverlayPath(name); ok {
+			// Don't lock go.mod if it's part of the overlay.
+			// On Plan 9, locking requires chmod, and we don't want to modify any file
+			// in the overlay. See #44700.
+			data, err = os.ReadFile(gomodActual)
+		} else {
+			data, err = lockedfile.Read(gomodActual)
+		}
+		if err != nil {
+			return "", nil, module.VersionError(m, fmt.Errorf("reading %s: %v", base.ShortPath(name), err))
+		}
+	} else {
+		if !semver.IsValid(m.Version) {
+			// Disallow the broader queries supported by fetch.Lookup.
+			base.Fatalf("go: internal error: %s@%s: unexpected invalid semantic version", m.Path, m.Version)
+		}
+		name = "go.mod"
+		data, err = modfetch.GoMod(m.Path, m.Version)
+	}
+	return name, data, err
+}
+
 // queryLatestVersionIgnoringRetractions looks up the latest version of the
 // module with the given path without considering retracted or excluded
 // versions.
diff --git a/src/cmd/go/internal/modload/query.go b/src/cmd/go/internal/modload/query.go
index 6f6c6e8c98..e737ca90fc 100644
--- a/src/cmd/go/internal/modload/query.go
+++ b/src/cmd/go/internal/modload/query.go
@@ -5,13 +5,13 @@
 package modload
 
 import (
+	"bytes"
 	"context"
 	"errors"
 	"fmt"
 	"io/fs"
 	"os"
 	pathpkg "path"
-	"path/filepath"
 	"sort"
 	"strings"
 	"sync"
@@ -920,8 +920,8 @@ func (e *PackageNotInModuleError) ImportPath() string {
 	return ""
 }
 
-// ModuleHasRootPackage returns whether module m contains a package m.Path.
-func ModuleHasRootPackage(ctx context.Context, m module.Version) (bool, error) {
+// moduleHasRootPackage returns whether module m contains a package m.Path.
+func moduleHasRootPackage(ctx context.Context, m module.Version) (bool, error) {
 	needSum := false
 	root, isLocal, err := fetch(ctx, m, needSum)
 	if err != nil {
@@ -931,14 +931,32 @@ func ModuleHasRootPackage(ctx context.Context, m module.Version) (bool, error) {
 	return ok, err
 }
 
-func versionHasGoMod(ctx context.Context, m module.Version) (bool, error) {
-	needSum := false
-	root, _, err := fetch(ctx, m, needSum)
+// versionHasGoMod returns whether a version has a go.mod file.
+//
+// versionHasGoMod fetches the go.mod file (possibly a fake) and true if it
+// contains anything other than a module directive with the same path. When a
+// module does not have a real go.mod file, the go command acts as if it had one
+// that only contained a module directive. Normal go.mod files created after
+// 1.12 at least have a go directive.
+//
+// This function is a heuristic, since it's possible to commit a file that would
+// pass this test. However, we only need a heurstic for determining whether
+// +incompatible versions may be "latest", which is what this function is used
+// for.
+//
+// This heuristic is useful for two reasons: first, when using a proxy,
+// this lets us fetch from the .mod endpoint which is much faster than the .zip
+// endpoint. The .mod file is used anyway, even if the .zip file contains a
+// go.mod with different content. Second, if we don't fetch the .zip, then
+// we don't need to verify it in go.sum. This makes 'go list -m -u' faster
+// and simpler.
+func versionHasGoMod(_ context.Context, m module.Version) (bool, error) {
+	_, data, err := rawGoModData(m)
 	if err != nil {
 		return false, err
 	}
-	fi, err := os.Stat(filepath.Join(root, "go.mod"))
-	return err == nil && !fi.IsDir(), nil
+	isFake := bytes.Equal(data, modfetch.LegacyGoMod(m.Path))
+	return !isFake, nil
 }
 
 // A versionRepo is a subset of modfetch.Repo that can report information about
diff --git a/src/cmd/go/internal/work/build.go b/src/cmd/go/internal/work/build.go
index 1babbda889..0ed2389cd5 100644
--- a/src/cmd/go/internal/work/build.go
+++ b/src/cmd/go/internal/work/build.go
@@ -128,8 +128,8 @@ and test commands:
 		a build will run as if the disk file path exists with the contents
 		given by the backing file paths, or as if the disk file path does not
 		exist if its backing file path is empty. Support for the -overlay flag
-		has some limitations:importantly, cgo files included from outside the
-		include path must be  in the same directory as the Go package they are
+		has some limitations: importantly, cgo files included from outside the
+		include path must be in the same directory as the Go package they are
 		included from, and overlays will not appear when binaries and tests are
 		run through go run and go test respectively.
 	-pkgdir dir
diff --git a/src/cmd/go/internal/work/exec.go b/src/cmd/go/internal/work/exec.go
index b506b83656..5a225fb9f1 100644
--- a/src/cmd/go/internal/work/exec.go
+++ b/src/cmd/go/internal/work/exec.go
@@ -252,8 +252,15 @@ func (b *Builder) buildActionID(a *Action) cache.ActionID {
 
 		ccExe := b.ccExe()
 		fmt.Fprintf(h, "CC=%q %q %q %q\n", ccExe, cppflags, cflags, ldflags)
-		if ccID, err := b.gccToolID(ccExe[0], "c"); err == nil {
-			fmt.Fprintf(h, "CC ID=%q\n", ccID)
+		// Include the C compiler tool ID so that if the C
+		// compiler changes we rebuild the package.
+		// But don't do that for standard library packages like net,
+		// so that the prebuilt .a files from a Go binary install
+		// don't need to be rebuilt with the local compiler.
+		if !p.Standard {
+			if ccID, err := b.gccToolID(ccExe[0], "c"); err == nil {
+				fmt.Fprintf(h, "CC ID=%q\n", ccID)
+			}
 		}
 		if len(p.CXXFiles)+len(p.SwigCXXFiles) > 0 {
 			cxxExe := b.cxxExe()
diff --git a/src/cmd/go/internal/work/security.go b/src/cmd/go/internal/work/security.go
index 36bbab37ee..e9b9f6c6c0 100644
--- a/src/cmd/go/internal/work/security.go
+++ b/src/cmd/go/internal/work/security.go
@@ -208,8 +208,8 @@ var validLinkerFlags = []*lazyregexp.Regexp{
 	re(`-Wl,-z,(no)?execstack`),
 	re(`-Wl,-z,relro`),
 
-	re(`[a-zA-Z0-9_/].*\.(a|o|obj|dll|dylib|so)`), // direct linker inputs: x.o or libfoo.so (but not -foo.o or @foo.o)
-	re(`\./.*\.(a|o|obj|dll|dylib|so)`),
+	re(`[a-zA-Z0-9_/].*\.(a|o|obj|dll|dylib|so|tbd)`), // direct linker inputs: x.o or libfoo.so (but not -foo.o or @foo.o)
+	re(`\./.*\.(a|o|obj|dll|dylib|so|tbd)`),
 }
 
 var validLinkerFlagsWithNextArg = []string{
diff --git a/src/cmd/go/internal/work/security_test.go b/src/cmd/go/internal/work/security_test.go
index 4f2e0eb21a..8d4be0abfc 100644
--- a/src/cmd/go/internal/work/security_test.go
+++ b/src/cmd/go/internal/work/security_test.go
@@ -164,6 +164,8 @@ var goodLinkerFlags = [][]string{
 	{"-Wl,-framework", "-Wl,Chocolate"},
 	{"-Wl,-framework,Chocolate"},
 	{"-Wl,-unresolved-symbols=ignore-all"},
+	{"libcgotbdtest.tbd"},
+	{"./libcgotbdtest.tbd"},
 }
 
 var badLinkerFlags = [][]string{
diff --git a/src/cmd/go/main.go b/src/cmd/go/main.go
index 02174a56ff..16361e02ca 100644
--- a/src/cmd/go/main.go
+++ b/src/cmd/go/main.go
@@ -145,24 +145,6 @@ func main() {
 		os.Exit(2)
 	}
 
-	if err := buildcfg.Error; err != nil {
-		fmt.Fprintf(os.Stderr, "go: %v\n", buildcfg.Error)
-		os.Exit(2)
-	}
-
-	// Set environment (GOOS, GOARCH, etc) explicitly.
-	// In theory all the commands we invoke should have
-	// the same default computation of these as we do,
-	// but in practice there might be skew
-	// This makes sure we all agree.
-	cfg.OrigEnv = os.Environ()
-	cfg.CmdEnv = envcmd.MkEnv()
-	for _, env := range cfg.CmdEnv {
-		if os.Getenv(env.Name) != env.Value {
-			os.Setenv(env.Name, env.Value)
-		}
-	}
-
 BigCmdLoop:
 	for bigCmd := base.Go; ; {
 		for _, cmd := range bigCmd.Commands {
@@ -188,18 +170,7 @@ BigCmdLoop:
 			if !cmd.Runnable() {
 				continue
 			}
-			cmd.Flag.Usage = func() { cmd.Usage() }
-			if cmd.CustomFlags {
-				args = args[1:]
-			} else {
-				base.SetFromGOFLAGS(&cmd.Flag)
-				cmd.Flag.Parse(args[1:])
-				args = cmd.Flag.Args()
-			}
-			ctx := maybeStartTrace(context.Background())
-			ctx, span := trace.StartSpan(ctx, fmt.Sprint("Running ", cmd.Name(), " command"))
-			cmd.Run(ctx, cmd, args)
-			span.Done()
+			invoke(cmd, args)
 			base.Exit()
 			return
 		}
@@ -213,6 +184,39 @@ BigCmdLoop:
 	}
 }
 
+func invoke(cmd *base.Command, args []string) {
+	// 'go env' handles checking the build config
+	if cmd != envcmd.CmdEnv {
+		buildcfg.Check()
+	}
+
+	// Set environment (GOOS, GOARCH, etc) explicitly.
+	// In theory all the commands we invoke should have
+	// the same default computation of these as we do,
+	// but in practice there might be skew
+	// This makes sure we all agree.
+	cfg.OrigEnv = os.Environ()
+	cfg.CmdEnv = envcmd.MkEnv()
+	for _, env := range cfg.CmdEnv {
+		if os.Getenv(env.Name) != env.Value {
+			os.Setenv(env.Name, env.Value)
+		}
+	}
+
+	cmd.Flag.Usage = func() { cmd.Usage() }
+	if cmd.CustomFlags {
+		args = args[1:]
+	} else {
+		base.SetFromGOFLAGS(&cmd.Flag)
+		cmd.Flag.Parse(args[1:])
+		args = cmd.Flag.Args()
+	}
+	ctx := maybeStartTrace(context.Background())
+	ctx, span := trace.StartSpan(ctx, fmt.Sprint("Running ", cmd.Name(), " command"))
+	cmd.Run(ctx, cmd, args)
+	span.Done()
+}
+
 func init() {
 	base.Usage = mainUsage
 }
diff --git a/src/cmd/go/script_test.go b/src/cmd/go/script_test.go
index 327eaff445..639e907db0 100644
--- a/src/cmd/go/script_test.go
+++ b/src/cmd/go/script_test.go
@@ -517,7 +517,7 @@ func (ts *testScript) cmdCd(want simpleStatus, args []string) {
 		ts.fatalf("usage: cd dir")
 	}
 
-	dir := args[0]
+	dir := filepath.FromSlash(args[0])
 	if !filepath.IsAbs(dir) {
 		dir = filepath.Join(ts.cd, dir)
 	}
diff --git a/src/cmd/go/testdata/mod/rsc.io_sampler_v1.2.1.txt b/src/cmd/go/testdata/mod/rsc.io_sampler_v1.2.1.txt
index 00b71bf0d5..7982cccea1 100644
--- a/src/cmd/go/testdata/mod/rsc.io_sampler_v1.2.1.txt
+++ b/src/cmd/go/testdata/mod/rsc.io_sampler_v1.2.1.txt
@@ -5,7 +5,7 @@ module "rsc.io/sampler"
 
 require "golang.org/x/text" v0.0.0-20170915032832-14c0d48ead0c
 -- .info --
-{"Version":"v1.2.1","Name":"cac3af4f8a0ab40054fa6f8d423108a63a1255bb","Short":"cac3af4f8a0a","Time":"2018-02-13T18:16:22Z"}EOF
+{"Version":"v1.2.1","Name":"cac3af4f8a0ab40054fa6f8d423108a63a1255bb","Short":"cac3af4f8a0a","Time":"2018-02-13T18:16:22Z"}
 -- hello.go --
 // Copyright 2018 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
diff --git a/src/cmd/go/testdata/script/README b/src/cmd/go/testdata/script/README
index d7e67bb7b6..48e4055b0b 100644
--- a/src/cmd/go/testdata/script/README
+++ b/src/cmd/go/testdata/script/README
@@ -102,6 +102,7 @@ The commands are:
 
 - cd dir
   Change to the given directory for future commands.
+  The directory must use slashes as path separator.
 
 - chmod perm path...
   Change the permissions of the files or directories named by the path arguments
diff --git a/src/cmd/go/testdata/script/badgo.txt b/src/cmd/go/testdata/script/badgo.txt
new file mode 100644
index 0000000000..cf4e2584d6
--- /dev/null
+++ b/src/cmd/go/testdata/script/badgo.txt
@@ -0,0 +1,50 @@
+go get example.net/badgo@v1.0.0
+go get example.net/badgo@v1.1.0
+go get example.net/badgo@v1.2.0
+go get example.net/badgo@v1.3.0
+go get example.net/badgo@v1.4.0
+go get example.net/badgo@v1.5.0
+! go get example.net/badgo@v1.6.0
+stderr 'invalid go version .X.Y.: must match format 1.23'
+
+-- go.mod --
+module m
+
+replace (
+	example.net/badgo v1.0.0 => ./v1.0.0
+	example.net/badgo v1.1.0 => ./v1.1.0
+	example.net/badgo v1.2.0 => ./v1.2.0
+	example.net/badgo v1.3.0 => ./v1.3.0
+	example.net/badgo v1.4.0 => ./v1.4.0
+	example.net/badgo v1.5.0 => ./v1.5.0
+	example.net/badgo v1.6.0 => ./v1.6.0
+)
+
+-- v1.0.0/go.mod --
+module example.net/badgo
+go 1.17.0
+
+-- v1.1.0/go.mod --
+module example.net/badgo
+go 1.17rc2
+
+-- v1.2.0/go.mod --
+module example.net/badgo
+go 1.17.1
+
+-- v1.3.0/go.mod --
+module example.net/badgo
+go v1.17.0
+
+-- v1.4.0/go.mod --
+module example.net/badgo
+go v1.17.0-rc.2
+
+-- v1.5.0/go.mod --
+module example.net/badgo
+go v1.17.1
+
+-- v1.6.0/go.mod --
+module example.net/badgo
+go X.Y
+
diff --git a/src/cmd/go/testdata/script/build_ignore_leading_bom.txt b/src/cmd/go/testdata/script/build_ignore_leading_bom.txt
new file mode 100644
index 0000000000..37141f3466
--- /dev/null
+++ b/src/cmd/go/testdata/script/build_ignore_leading_bom.txt
@@ -0,0 +1,27 @@
+# Per https://golang.org/ref/spec#Source_code_representation:
+# a compiler may ignore a UTF-8-encoded byte order mark (U+FEFF)
+# if it is the first Unicode code point in the source text.
+
+go list -f 'Imports: {{.Imports}} EmbedFiles: {{.EmbedFiles}}' .
+stdout '^Imports: \[embed m/hello\] EmbedFiles: \[.*file\]$'
+
+-- go.mod --
+module m
+
+go 1.16
+-- m.go --
+package main
+
+import (
+	_ "embed"
+
+	"m/hello"
+)
+
+//go:embed file
+var s string
+
+-- hello/hello.go --
+package hello
+
+-- file --
diff --git a/src/cmd/go/testdata/script/build_package_not_stale_trailing_slash.txt b/src/cmd/go/testdata/script/build_package_not_stale_trailing_slash.txt
deleted file mode 100644
index 38a151ef1f..0000000000
--- a/src/cmd/go/testdata/script/build_package_not_stale_trailing_slash.txt
+++ /dev/null
@@ -1,13 +0,0 @@
-# Tests Issue #12690
-
-[gccgo] skip 'gccgo does not have GOROOT'
-
-! stale runtime
-! stale os
-! stale io
-
-env GOROOT=$GOROOT'/'
-
-! stale runtime
-! stale os
-! stale io
\ No newline at end of file
diff --git a/src/cmd/go/testdata/script/cgo_stale.txt b/src/cmd/go/testdata/script/cgo_stale.txt
new file mode 100644
index 0000000000..9e46855ead
--- /dev/null
+++ b/src/cmd/go/testdata/script/cgo_stale.txt
@@ -0,0 +1,39 @@
+# golang.org/issue/46347: a stale runtime/cgo should only force a single rebuild
+
+[!cgo] skip
+[short] skip
+
+
+# If we set a unique CGO_CFLAGS, the installed copy of runtime/cgo
+# should be reported as stale.
+
+env CGO_CFLAGS=-DTestScript_cgo_stale=true
+stale runtime/cgo
+
+
+# If we then build a package that uses cgo, runtime/cgo should be rebuilt and
+# cached with the new flag, but not installed to GOROOT (and thus still stale).
+
+env GOCACHE=$WORK/cache  # Use a fresh cache to avoid interference between runs.
+
+go build -x .
+stderr '[/\\]cgo'$GOEXE'["]? .* -importpath runtime/cgo'
+stale runtime/cgo
+
+
+# After runtime/cgo has been rebuilt and cached, it should not be rebuilt again
+# even though it is still reported as stale.
+
+go build -x .
+! stderr '[/\\]cgo'$GOEXE'["]? .* -importpath runtime/cgo'
+stale runtime/cgo
+
+
+-- go.mod --
+module example.com/m
+
+go 1.17
+-- m.go --
+package m
+
+import "C"
diff --git a/src/cmd/go/testdata/script/env_cross_build.txt b/src/cmd/go/testdata/script/env_cross_build.txt
new file mode 100644
index 0000000000..3feeba6b14
--- /dev/null
+++ b/src/cmd/go/testdata/script/env_cross_build.txt
@@ -0,0 +1,29 @@
+# Test that the corect default GOEXPERIMENT is used when cross
+# building with GOENV (#46815).
+
+# Unset variables set by the TestScript harness. Users typically won't
+# explicitly configure these, and #46815 doesn't repro if they are.
+env GOOS=
+env GOARCH=
+env GOEXPERIMENT=
+
+env GOENV=windows-amd64
+go build internal/abi
+
+env GOENV=ios-arm64
+go build internal/abi
+
+env GOENV=linux-mips
+go build internal/abi
+
+-- windows-amd64 --
+GOOS=windows
+GOARCH=amd64
+
+-- ios-arm64 --
+GOOS=ios
+GOARCH=arm64
+
+-- linux-mips --
+GOOS=linux
+GOARCH=mips
diff --git a/src/cmd/go/testdata/script/env_exp.txt b/src/cmd/go/testdata/script/env_exp.txt
new file mode 100644
index 0000000000..681512d87c
--- /dev/null
+++ b/src/cmd/go/testdata/script/env_exp.txt
@@ -0,0 +1,17 @@
+# Test GOEXPERIMENT variable
+
+# go env shows default empty GOEXPERIMENT
+go env
+stdout GOEXPERIMENT=
+
+# go env shows valid experiments
+env GOEXPERIMENT=fieldtrack,staticlockranking
+go env GOEXPERIMENT
+stdout '.*fieldtrack.*staticlockranking.*'
+go env
+stdout 'GOEXPERIMENT=.*fieldtrack.*staticlockranking.*'
+
+# go env rejects unknown experiments
+env GOEXPERIMENT=bad
+! go env GOEXPERIMENT
+stderr 'unknown GOEXPERIMENT bad'
diff --git a/src/cmd/go/testdata/script/env_unset.txt b/src/cmd/go/testdata/script/env_unset.txt
new file mode 100644
index 0000000000..4e0f249509
--- /dev/null
+++ b/src/cmd/go/testdata/script/env_unset.txt
@@ -0,0 +1,30 @@
+# Test that we can unset variables, even if initially invalid,
+# as long as resulting config is valid.
+
+env GOENV=badenv
+env GOOS=
+env GOARCH=
+env GOEXPERIMENT=
+
+! go env
+stderr '^go(\.exe)?: unknown GOEXPERIMENT badexp$'
+
+go env -u GOEXPERIMENT
+
+! go env
+stderr '^cmd/go: unsupported GOOS/GOARCH pair bados/badarch$'
+
+! go env -u GOOS
+stderr '^go env -u: unsupported GOOS/GOARCH pair \w+/badarch$'
+
+! go env -u GOARCH
+stderr '^go env -u: unsupported GOOS/GOARCH pair bados/\w+$'
+
+go env -u GOOS GOARCH
+
+go env
+
+-- badenv --
+GOOS=bados
+GOARCH=badarch
+GOEXPERIMENT=badexp
diff --git a/src/cmd/go/testdata/script/env_write.txt b/src/cmd/go/testdata/script/env_write.txt
index 4fa39df104..b5e9739167 100644
--- a/src/cmd/go/testdata/script/env_write.txt
+++ b/src/cmd/go/testdata/script/env_write.txt
@@ -179,3 +179,9 @@ stderr 'unsupported GOOS/GOARCH.*windows/mips$'
 stderr 'go env -w: GOMODCACHE entry is relative; must be absolute path: "~/test"'
 ! go env -w GOMODCACHE=./test
 stderr 'go env -w: GOMODCACHE entry is relative; must be absolute path: "./test"'
+
+# go env -w checks validity of GOEXPERIMENT
+env GOEXPERIMENT=
+! go env -w GOEXPERIMENT=badexp
+stderr 'unknown GOEXPERIMENT badexp'
+go env -w GOEXPERIMENT=fieldtrack
diff --git a/src/cmd/go/testdata/script/list_cgo_compiled_importmap.txt b/src/cmd/go/testdata/script/list_cgo_compiled_importmap.txt
new file mode 100644
index 0000000000..3d68ef3055
--- /dev/null
+++ b/src/cmd/go/testdata/script/list_cgo_compiled_importmap.txt
@@ -0,0 +1,38 @@
+# Regression test for https://golang.org/issue/46462.
+#
+# The "runtime/cgo" import found in synthesized .go files (reported in
+# the CompiledGoFiles field) should have a corresponding entry in the
+# ImportMap field when a runtime/cgo variant (such as a test variant)
+# will be used.
+
+[short] skip  # -compiled can be slow (because it compiles things)
+[!cgo] skip
+
+env CGO_ENABLED=1
+env GOFLAGS=-tags=netcgo  # Force net to use cgo even on Windows.
+
+
+# "runtime/cgo [runtime.test]" appears in the the test dependencies of "runtime",
+# because "runtime/cgo" itself depends on "runtime"
+
+go list -deps -test -compiled -f '{{if eq .ImportPath "net [runtime.test]"}}{{printf "%q" .Imports}}{{end}}' runtime
+
+	# Control case: the explicitly-imported package "sync" is a test variant,
+	# because "sync" depends on "runtime".
+stdout '"sync \[runtime\.test\]"'
+! stdout '"sync"'
+
+	# Experiment: the implicitly-imported package "runtime/cgo" is also a test variant,
+	# because "runtime/cgo" also depends on "runtime".
+stdout '"runtime/cgo \[runtime\.test\]"'
+! stdout '"runtime/cgo"'
+
+
+# Because the import of "runtime/cgo" in the cgo-generated file actually refers
+# to "runtime/cgo [runtime.test]", the latter should be listed in the ImportMap.
+# BUG(#46462): Today, it is not.
+
+go list -deps -test -compiled -f '{{if eq .ImportPath "net [runtime.test]"}}{{printf "%q" .ImportMap}}{{end}}' runtime
+
+stdout '"sync":"sync \[runtime\.test\]"'                # control
+stdout '"runtime/cgo":"runtime/cgo \[runtime\.test\]"'  # experiment
diff --git a/src/cmd/go/testdata/script/list_find_nodeps.txt b/src/cmd/go/testdata/script/list_find_nodeps.txt
new file mode 100644
index 0000000000..e08ce78950
--- /dev/null
+++ b/src/cmd/go/testdata/script/list_find_nodeps.txt
@@ -0,0 +1,49 @@
+# Issue #46092
+# go list -find should always return a package with an empty Deps list
+
+# The linker loads implicit dependencies
+go list -find -f {{.Deps}} ./cmd
+stdout '\[\]'
+
+# Cgo translation may add imports of "unsafe", "runtime/cgo" and "syscall"
+go list -find -f {{.Deps}} ./cgo
+stdout '\[\]'
+
+# SWIG adds imports of some standard packages
+go list -find -f {{.Deps}} ./swig
+stdout '\[\]'
+
+-- go.mod --
+module listfind
+
+-- cmd/main.go --
+package main
+
+func main() {}
+
+-- cgo/pkg.go --
+package cgopkg
+
+/*
+#include 
+*/
+import "C"
+
+func F() {
+    println(C.INT_MAX)
+}
+
+-- cgo/pkg_notcgo.go --
+//go:build !cgo
+// +build !cgo
+
+package cgopkg
+
+func F() {
+    println(0)
+}
+
+-- swig/pkg.go --
+package swigpkg
+
+-- swig/a.swigcxx --
diff --git a/src/cmd/go/testdata/script/list_gomod_in_gopath.txt b/src/cmd/go/testdata/script/list_gomod_in_gopath.txt
new file mode 100644
index 0000000000..064f33adc3
--- /dev/null
+++ b/src/cmd/go/testdata/script/list_gomod_in_gopath.txt
@@ -0,0 +1,23 @@
+# Issue 46119
+
+# When a module is inside a GOPATH workspace, Package.Root should be set to
+# Module.Dir instead of $GOPATH/src.
+
+env GOPATH=$WORK/tmp
+cd $WORK/tmp/src/test
+
+go list -f {{.Root}}
+stdout ^$PWD$
+
+# Were we really inside a GOPATH workspace?
+env GO111MODULE=off
+go list -f {{.Root}}
+stdout ^$WORK/tmp$
+
+-- $WORK/tmp/src/test/go.mod --
+module test
+
+-- $WORK/tmp/src/test/main.go --
+package main
+
+func main() {}
diff --git a/src/cmd/go/testdata/script/list_load_err.txt b/src/cmd/go/testdata/script/list_load_err.txt
index b3b72713e5..0cfa7fbed2 100644
--- a/src/cmd/go/testdata/script/list_load_err.txt
+++ b/src/cmd/go/testdata/script/list_load_err.txt
@@ -2,26 +2,42 @@
 # other files in the same package cause go/build.Import to return an error.
 # Verfifies golang.org/issue/38568
 
-
 go list -e -deps ./scan
 stdout m/want
 
-
 go list -e -deps ./multi
 stdout m/want
 
-
 go list -e -deps ./constraint
 stdout m/want
 
-
 [cgo] go list -e -test -deps ./cgotest
 [cgo] stdout m/want
 
-
 [cgo] go list -e -deps ./cgoflag
 [cgo] stdout m/want
 
+
+# go list -e should include files with errors in GoFiles, TestGoFiles, and
+# other lists, assuming they match constraints.
+# Verifies golang.org/issue/39986
+go list -e -f '{{range .GoFiles}}{{.}},{{end}}' ./scan
+stdout '^good.go,scan.go,$'
+
+go list -e -f '{{range .GoFiles}}{{.}},{{end}}' ./multi
+stdout '^a.go,b.go,$'
+
+go list -e -f '{{range .GoFiles}}{{.}},{{end}}' ./constraint
+stdout '^good.go,$'
+go list -e -f '{{range .IgnoredGoFiles}}{{.}},{{end}}' ./constraint
+stdout '^constraint.go,$'
+
+[cgo] go list -e -f '{{range .XTestGoFiles}}{{.}},{{end}}' ./cgotest
+[cgo] stdout '^cgo_test.go,$'
+
+[cgo] go list -e -f '{{range .GoFiles}}{{.}},{{end}}' ./cgoflag
+[cgo] stdout '^cgoflag.go,$'
+
 -- go.mod --
 module m
 
diff --git a/src/cmd/go/testdata/script/list_std_stale.txt b/src/cmd/go/testdata/script/list_std_stale.txt
deleted file mode 100644
index e5c1f334fd..0000000000
--- a/src/cmd/go/testdata/script/list_std_stale.txt
+++ /dev/null
@@ -1,31 +0,0 @@
-# https://golang.org/issue/44725: packages in std should not be reported as stale,
-# regardless of whether they are listed from within or outside GOROOT/src.
-
-# Control case: net should not be stale at the start of the test,
-# and should depend on vendor/golang.org/… instead of golang.org/….
-
-! stale net
-
-go list -deps net
-stdout '^vendor/golang.org/x/net'
-! stdout '^golang.org/x/net'
-
-# Net should also not be stale when viewed from within GOROOT/src,
-# and should still report the same package dependencies.
-
-cd $GOROOT/src
-! stale net
-
-go list -deps net
-stdout '^vendor/golang.org/x/net'
-! stdout '^golang.org/x/net'
-
-
-# However, 'go mod' and 'go get' subcommands should report the original module
-# dependencies, not the vendored packages.
-
-[!net] stop
-
-env GOPROXY=
-go mod why -m golang.org/x/net
-stdout '^# golang.org/x/net\nnet\ngolang.org/x/net'
diff --git a/src/cmd/go/testdata/script/list_std_vendor.txt b/src/cmd/go/testdata/script/list_std_vendor.txt
new file mode 100644
index 0000000000..8f27cc1e8d
--- /dev/null
+++ b/src/cmd/go/testdata/script/list_std_vendor.txt
@@ -0,0 +1,32 @@
+# https://golang.org/issue/44725: packages in std should have the same
+# dependencies regardless of whether they are listed from within or outside
+# GOROOT/src.
+
+# Control case: net, viewed from outside the 'std' module,
+# should depend on vendor/golang.org/… instead of golang.org/….
+
+go list -deps net
+stdout '^vendor/golang.org/x/net'
+! stdout '^golang.org/x/net'
+cp stdout $WORK/net-deps.txt
+
+
+# It should still report the same package dependencies when viewed from
+# within GOROOT/src.
+
+cd $GOROOT/src
+
+go list -deps net
+stdout '^vendor/golang.org/x/net'
+! stdout '^golang.org/x/net'
+cmp stdout $WORK/net-deps.txt
+
+
+# However, 'go mod' and 'go get' subcommands should report the original module
+# dependencies, not the vendored packages.
+
+[!net] stop
+
+env GOPROXY=
+go mod why -m golang.org/x/net
+stdout '^# golang.org/x/net\nnet\ngolang.org/x/net'
diff --git a/src/cmd/go/testdata/script/mod_deprecate_message.txt b/src/cmd/go/testdata/script/mod_deprecate_message.txt
index 4a0674b808..567027935d 100644
--- a/src/cmd/go/testdata/script/mod_deprecate_message.txt
+++ b/src/cmd/go/testdata/script/mod_deprecate_message.txt
@@ -1,26 +1,26 @@
 # When there is a short single-line message, 'go get' should print it all.
 go get -d short
-stderr '^go: warning: module short is deprecated: short$'
+stderr '^go: module short is deprecated: short$'
 go list -m -u -f '{{.Deprecated}}' short
 stdout '^short$'
 
 # When there is a multi-line message, 'go get' should print the first line.
 go get -d multiline
-stderr '^go: warning: module multiline is deprecated: first line$'
+stderr '^go: module multiline is deprecated: first line$'
 ! stderr 'second line'
 go list -m -u -f '{{.Deprecated}}' multiline
 stdout '^first line\nsecond line.$'
 
 # When there is a long message, 'go get' should print a placeholder.
 go get -d long
-stderr '^go: warning: module long is deprecated: \(message omitted: too long\)$'
+stderr '^go: module long is deprecated: \(message omitted: too long\)$'
 go list -m -u -f '{{.Deprecated}}' long
 stdout '^aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa$'
 
 # When a message contains unprintable chracters, 'go get' should say that
 # without printing the message.
 go get -d unprintable
-stderr '^go: warning: module unprintable is deprecated: \(message omitted: contains non-printable characters\)$'
+stderr '^go: module unprintable is deprecated: \(message omitted: contains non-printable characters\)$'
 go list -m -u -f '{{.Deprecated}}' unprintable
 stdout '^message contains ASCII BEL\x07$'
 
diff --git a/src/cmd/go/testdata/script/mod_download.txt b/src/cmd/go/testdata/script/mod_download.txt
index 8a9faffe4e..c2b72b2a02 100644
--- a/src/cmd/go/testdata/script/mod_download.txt
+++ b/src/cmd/go/testdata/script/mod_download.txt
@@ -107,13 +107,28 @@ stderr '^go mod download: skipping argument m that resolves to the main module\n
 ! go mod download m@latest
 stderr '^go mod download: m@latest: malformed module path "m": missing dot in first path element$'
 
-# download updates go.mod and populates go.sum
+# download without arguments updates go.mod and go.sum after loading the
+# build list, but does not save sums for downloaded zips.
 cd update
+cp go.mod.orig go.mod
 ! exists go.sum
 go mod download
+cmp go.mod.update go.mod
+cmp go.sum.update go.sum
+cp go.mod.orig go.mod
+rm go.sum
+
+# download with arguments (even "all") does update go.mod and go.sum.
+go mod download rsc.io/sampler
+cmp go.mod.update go.mod
 grep '^rsc.io/sampler v1.3.0 ' go.sum
-go list -m rsc.io/sampler
-stdout '^rsc.io/sampler v1.3.0$'
+cp go.mod.orig go.mod
+rm go.sum
+
+go mod download all
+cmp go.mod.update go.mod
+grep '^rsc.io/sampler v1.3.0 ' go.sum
+cd ..
 
 # allow go mod download without go.mod
 env GO111MODULE=auto
@@ -131,7 +146,7 @@ stderr 'get '$GOPROXY
 -- go.mod --
 module m
 
--- update/go.mod --
+-- update/go.mod.orig --
 module m
 
 go 1.16
@@ -140,3 +155,16 @@ require (
 	rsc.io/quote v1.5.2
 	rsc.io/sampler v1.2.1 // older version than in build list
 )
+-- update/go.mod.update --
+module m
+
+go 1.16
+
+require (
+	rsc.io/quote v1.5.2
+	rsc.io/sampler v1.3.0 // older version than in build list
+)
+-- update/go.sum.update --
+golang.org/x/text v0.0.0-20170915032832-14c0d48ead0c/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
+rsc.io/quote v1.5.2/go.mod h1:LzX7hefJvL54yjefDEDHNONDjII0t9xZLPXsUe+TKr0=
+rsc.io/sampler v1.3.0/go.mod h1:T1hPZKmBbMNahiBKFy5HrXp6adAjACjK9JXDnKaTXpA=
diff --git a/src/cmd/go/testdata/script/mod_edit_no_modcache.txt b/src/cmd/go/testdata/script/mod_edit_no_modcache.txt
new file mode 100644
index 0000000000..ced15bb301
--- /dev/null
+++ b/src/cmd/go/testdata/script/mod_edit_no_modcache.txt
@@ -0,0 +1,15 @@
+# 'go mod edit' opportunistically locks the side-lock file in the module cache,
+# for compatibility with older versions of the 'go' command.
+# It does not otherwise depend on the module cache, so it should not
+# fail if the module cache directory cannot be created.
+
+[root] skip
+
+mkdir $WORK/readonly
+chmod 0555 $WORK/readonly
+env GOPATH=$WORK/readonly/nonexist
+
+go mod edit -go=1.17
+
+-- go.mod --
+module example.com/m
diff --git a/src/cmd/go/testdata/script/mod_get_deprecate_install.txt b/src/cmd/go/testdata/script/mod_get_deprecate_install.txt
index d832b5f2e8..63cd27a42d 100644
--- a/src/cmd/go/testdata/script/mod_get_deprecate_install.txt
+++ b/src/cmd/go/testdata/script/mod_get_deprecate_install.txt
@@ -7,16 +7,33 @@ go get example.com/cmd/a
 stderr '^go get: installing executables with ''go get'' in module mode is deprecated.$'
 stderr 'Use ''go install pkg@version'' instead.'
 
-
-go mod init m
+cp go.mod.orig go.mod
 
 # 'go get' inside a module with a non-main package does not print a message.
 # This will stop building in the future, but it's the command we want to use.
 go get rsc.io/quote
 ! stderr deprecated
+cp go.mod.orig go.mod
 
 # 'go get' inside a module with an executable prints a different
 # deprecation message.
 go get example.com/cmd/a
 stderr '^go get: installing executables with ''go get'' in module mode is deprecated.$'
 stderr 'To adjust and download dependencies of the current module, use ''go get -d'''
+cp go.mod.orig go.mod
+
+# 'go get' should not print a warning for a main package inside the main module.
+# The intent is most likely to update the dependencies of that package.
+# 'go install' would be used otherwise.
+go get m
+! stderr .
+cp go.mod.orig go.mod
+
+-- go.mod.orig --
+module m
+
+go 1.17
+-- main.go --
+package main
+
+func main() {}
diff --git a/src/cmd/go/testdata/script/mod_get_deprecated.txt b/src/cmd/go/testdata/script/mod_get_deprecated.txt
index 4633009f69..7bdd7a58a8 100644
--- a/src/cmd/go/testdata/script/mod_get_deprecated.txt
+++ b/src/cmd/go/testdata/script/mod_get_deprecated.txt
@@ -4,14 +4,14 @@ go get -d ./use/nothing
 
 # 'go get pkg' should show a deprecation message for the module providing pkg.
 go get -d example.com/deprecated/a
-stderr '^go: warning: module example.com/deprecated/a is deprecated: in example.com/deprecated/a@v1.9.0$'
+stderr '^go: module example.com/deprecated/a is deprecated: in example.com/deprecated/a@v1.9.0$'
 go get -d example.com/deprecated/a@v1.0.0
-stderr '^go: warning: module example.com/deprecated/a is deprecated: in example.com/deprecated/a@v1.9.0$'
+stderr '^go: module example.com/deprecated/a is deprecated: in example.com/deprecated/a@v1.9.0$'
 
 # 'go get pkg' should show a deprecation message for a module providing
 # packages directly imported by pkg.
 go get -d ./use/a
-stderr '^go: warning: module example.com/deprecated/a is deprecated: in example.com/deprecated/a@v1.9.0$'
+stderr '^go: module example.com/deprecated/a is deprecated: in example.com/deprecated/a@v1.9.0$'
 
 # 'go get pkg' may show a deprecation message for an indirectly required module
 # if it provides a package named on the command line.
@@ -20,7 +20,7 @@ go get -d ./use/b
 go get -d local/use
 ! stderr 'module.*is deprecated'
 go get -d example.com/deprecated/b
-stderr '^go: warning: module example.com/deprecated/b is deprecated: in example.com/deprecated/b@v1.9.0$'
+stderr '^go: module example.com/deprecated/b is deprecated: in example.com/deprecated/b@v1.9.0$'
 
 # 'go get pkg' does not show a deprecation message for a module providing a
 # directly imported package if the module is no longer deprecated in its
diff --git a/src/cmd/go/testdata/script/mod_get_lazy_indirect.txt b/src/cmd/go/testdata/script/mod_get_lazy_indirect.txt
new file mode 100644
index 0000000000..1cef9d1c0c
--- /dev/null
+++ b/src/cmd/go/testdata/script/mod_get_lazy_indirect.txt
@@ -0,0 +1,44 @@
+# https://golang.org/issue/45979: after 'go get' on a package,
+# that package should be importable without error.
+
+
+# We start out with an unresolved dependency.
+# 'go list' suggests that we run 'go get' on that dependency.
+
+! go list -deps .
+stderr '^m.go:3:8: no required module provides package rsc\.io/quote; to add it:\n\tgo get rsc.io/quote$'
+
+
+# When we run the suggested 'go get' command, the new dependency can be used
+# immediately.
+#
+# 'go get' marks the new dependency as 'indirect', because it doesn't scan
+# enough source code to know whether it is direct, and it is easier and less
+# invasive to remove an incorrect indirect mark (e.g. using 'go get') than to
+# add one that is missing ('go mod tidy' or 'go mod vendor').
+
+go get rsc.io/quote
+grep 'rsc.io/quote v\d+\.\d+\.\d+ // indirect$' go.mod
+! grep 'rsc.io/quote v\d+\.\d+\.\d+$' go.mod
+
+go list -deps .
+! stderr .
+[!short] go build .
+[!short] ! stderr .
+
+
+# 'go get .' (or 'go mod tidy') removes the indirect mark.
+
+go get .
+grep 'rsc.io/quote v\d+\.\d+\.\d+$' go.mod
+! grep 'rsc.io/quote v\d+\.\d+\.\d+ // indirect$' go.mod
+
+
+-- go.mod --
+module example.com/m
+
+go 1.17
+-- m.go --
+package m
+
+import _ "rsc.io/quote"
diff --git a/src/cmd/go/testdata/script/mod_get_trailing_slash.txt b/src/cmd/go/testdata/script/mod_get_trailing_slash.txt
index 3b38d8ba7d..c536693537 100644
--- a/src/cmd/go/testdata/script/mod_get_trailing_slash.txt
+++ b/src/cmd/go/testdata/script/mod_get_trailing_slash.txt
@@ -1,6 +1,3 @@
-# Populate go.sum
-go mod download
-
 # go list should succeed to load a package ending with ".go" if the path does
 # not correspond to an existing local file. Listing a pattern ending with
 # ".go/" should try to list a package regardless of whether a file exists at the
@@ -31,3 +28,10 @@ module m
 go 1.13
 
 require example.com/dotgo.go v1.0.0
+-- go.sum --
+example.com/dotgo.go v1.0.0 h1:XKJfs0V8x2PvY2tX8bJBCEbCDLnt15ma2onwhVpew/I=
+example.com/dotgo.go v1.0.0/go.mod h1:Qi6z/X3AC5vHiuMt6HF2ICx3KhIBGrMdrA7YoPDKqR0=
+-- use.go --
+package use
+
+import _ "example.com/dotgo.go"
diff --git a/src/cmd/go/testdata/script/mod_get_update_unrelated_sum.txt b/src/cmd/go/testdata/script/mod_get_update_unrelated_sum.txt
new file mode 100644
index 0000000000..0093c0eda0
--- /dev/null
+++ b/src/cmd/go/testdata/script/mod_get_update_unrelated_sum.txt
@@ -0,0 +1,120 @@
+# Check that 'go get' adds sums for updated modules if we had sums before,
+# even if we didn't load packages from them.
+# Verifies #44129.
+
+env fmt='{{.ImportPath}}: {{if .Error}}{{.Error.Err}}{{else}}ok{{end}}'
+
+# Control case: before upgrading, we have the sums we need.
+# go list -deps -e -f $fmt .
+# stdout '^rsc.io/quote: ok$'
+# ! stdout rsc.io/sampler  # not imported by quote in this version
+cp go.mod.orig go.mod
+cp go.sum.orig go.sum
+go mod tidy
+cmp go.mod.orig go.mod
+cmp go.sum.orig go.sum
+
+
+# Upgrade a module. This also upgrades rsc.io/quote, and though we didn't load
+# a package from it, we had the sum for its old version, so we need the
+# sum for the new version, too.
+go get -d example.com/upgrade@v0.0.2
+grep '^rsc.io/quote v1.5.2 ' go.sum
+
+# The upgrade still breaks the build because the new version of quote imports
+# rsc.io/sampler, and we don't have its zip sum.
+go list -deps -e -f $fmt
+stdout 'rsc.io/quote: ok'
+stdout 'rsc.io/sampler: missing go.sum entry for module providing package rsc.io/sampler'
+cp go.mod.orig go.mod
+cp go.sum.orig go.sum
+
+
+# Replace the old version with a directory before upgrading.
+# We didn't need a sum for it before (even though we had one), so we won't
+# fetch a new sum.
+go mod edit -replace rsc.io/quote@v1.0.0=./dummy
+go get -d example.com/upgrade@v0.0.2
+! grep '^rsc.io/quote v1.5.2 ' go.sum
+cp go.mod.orig go.mod
+cp go.sum.orig go.sum
+
+
+# Replace the new version with a directory before upgrading.
+# We can't get a sum for a directory.
+go mod edit -replace rsc.io/quote@v1.5.2=./dummy
+go get -d example.com/upgrade@v0.0.2
+! grep '^rsc.io/quote v1.5.2 ' go.sum
+cp go.mod.orig go.mod
+cp go.sum.orig go.sum
+
+
+# Replace the new version with a different version.
+# We should get a sum for that version.
+go mod edit -replace rsc.io/quote@v1.5.2=rsc.io/quote@v1.5.1
+go get -d example.com/upgrade@v0.0.2
+! grep '^rsc.io/quote v1.5.2 ' go.sum
+grep '^rsc.io/quote v1.5.1 ' go.sum
+cp go.mod.orig go.mod
+cp go.sum.orig go.sum
+
+
+# Delete the new version's zip (but not mod) from the cache and go offline.
+# 'go get' should fail when fetching the zip.
+rm $GOPATH/pkg/mod/cache/download/rsc.io/quote/@v/v1.5.2.zip
+env GOPROXY=off
+! go get -d example.com/upgrade@v0.0.2
+stderr '^go: upgraded rsc.io/quote v1.0.0 => v1.5.2: error finding sum for rsc.io/quote@v1.5.2: module lookup disabled by GOPROXY=off$'
+
+-- go.mod.orig --
+module m
+
+go 1.16
+
+require (
+	example.com/upgrade v0.0.1
+	rsc.io/quote v1.0.0
+)
+
+replace (
+	example.com/upgrade v0.0.1 => ./upgrade1
+	example.com/upgrade v0.0.2 => ./upgrade2
+)
+-- go.sum.orig --
+rsc.io/quote v1.0.0 h1:kQ3IZQzPTiDJxSZI98YaWgxFEhlNdYASHvh+MplbViw=
+rsc.io/quote v1.0.0/go.mod h1:v83Ri/njykPcgJltBc/gEkJTmjTsNgtO1Y7vyIK1CQA=
+-- go.sum.want --
+golang.org/x/text v0.0.0-20170915032832-14c0d48ead0c/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
+rsc.io/quote v1.0.0 h1:kQ3IZQzPTiDJxSZI98YaWgxFEhlNdYASHvh+MplbViw=
+rsc.io/quote v1.0.0/go.mod h1:v83Ri/njykPcgJltBc/gEkJTmjTsNgtO1Y7vyIK1CQA=
+rsc.io/quote v1.5.2 h1:3fEykkD9k7lYzXqCYrwGAf7iNhbk4yCjHmKBN9td4L0=
+rsc.io/quote v1.5.2/go.mod h1:LzX7hefJvL54yjefDEDHNONDjII0t9xZLPXsUe+TKr0=
+rsc.io/sampler v1.3.0/go.mod h1:T1hPZKmBbMNahiBKFy5HrXp6adAjACjK9JXDnKaTXpA=
+-- use.go --
+package use
+
+import (
+	_ "example.com/upgrade"
+	_ "rsc.io/quote"
+)
+-- upgrade1/go.mod --
+module example.com/upgrade
+
+go 1.16
+-- upgrade1/upgrade.go --
+package upgrade
+-- upgrade2/go.mod --
+module example.com/upgrade
+
+go 1.16
+
+require rsc.io/quote v1.5.2 // indirect
+-- upgrade2/upgrade.go --
+package upgrade
+-- dummy/go.mod --
+module rsc.io/quote
+
+go 1.16
+-- dummy/quote.go --
+package quote
+
diff --git a/src/cmd/go/testdata/script/mod_go_version_missing.txt b/src/cmd/go/testdata/script/mod_go_version_missing.txt
index aca36a0450..d704816729 100644
--- a/src/cmd/go/testdata/script/mod_go_version_missing.txt
+++ b/src/cmd/go/testdata/script/mod_go_version_missing.txt
@@ -73,10 +73,9 @@ module example.com/m
 
 go $goversion
 
-require (
-	example.com/dep v0.1.0
-	example.com/testdep v0.1.0 // indirect
-)
+require example.com/dep v0.1.0
+
+require example.com/testdep v0.1.0 // indirect
 
 replace (
 	example.com/dep v0.1.0 => ./dep
diff --git a/src/cmd/go/testdata/script/mod_graph_version.txt b/src/cmd/go/testdata/script/mod_graph_version.txt
new file mode 100644
index 0000000000..f9a73f4617
--- /dev/null
+++ b/src/cmd/go/testdata/script/mod_graph_version.txt
@@ -0,0 +1,101 @@
+# For this module, Go 1.17 prunes out a (transitive and otherwise-irrelevant)
+# requirement on a retracted higher version of a dependency.
+# However, when Go 1.16 reads the same requirements from the go.mod file,
+# it does not prune out that requirement, and selects the retracted version.
+#
+# The Go 1.16 module graph looks like:
+#
+# m ---- lazy v0.1.0 ---- requireincompatible v0.1.0 ---- incompatible v2.0.0+incompatible
+# |        |
+# + -------+------------- incompatible v1.0.0
+#
+# The Go 1.17 module graph is the same except that the dependencies of
+# requireincompatible are pruned out (because the module that requires
+# it — lazy v0.1.0 — specifies 'go 1.17', and it is not otherwise relevant to
+# the main module).
+
+cp go.mod go.mod.orig
+
+go mod graph
+cp stdout graph-1.17.txt
+stdout '^example\.com/m example\.com/retract/incompatible@v1\.0\.0$'
+stdout '^example\.net/lazy@v0\.1\.0 example\.com/retract/incompatible@v1\.0\.0$'
+! stdout 'example\.com/retract/incompatible@v2\.0\.0\+incompatible'
+
+go mod graph -go=1.17
+cmp stdout graph-1.17.txt
+
+cmp go.mod go.mod.orig
+
+
+# Setting -go=1.16 should report the graph as viewed by Go 1.16,
+# but should not edit the go.mod file.
+
+go mod graph -go=1.16
+cp stdout graph-1.16.txt
+stdout '^example\.com/m example\.com/retract/incompatible@v1\.0\.0$'
+stdout '^example\.net/lazy@v0\.1\.0 example.com/retract/incompatible@v1\.0\.0$'
+stdout '^example.net/requireincompatible@v0.1.0 example.com/retract/incompatible@v2\.0\.0\+incompatible$'
+
+cmp go.mod go.mod.orig
+
+
+# If we actually update the go.mod file to the requested go version,
+# we should get the same selected versions, but the roots of the graph
+# may be updated.
+#
+# TODO(#45551): The roots should not be updated.
+
+go mod edit -go=1.16
+go mod graph
+! stdout '^example\.com/m example\.com/retract/incompatible@v1\.0\.0$'
+stdout '^example\.net/lazy@v0.1.0 example.com/retract/incompatible@v1\.0\.0$'
+stdout '^example.net/requireincompatible@v0.1.0 example.com/retract/incompatible@v2\.0\.0\+incompatible$'
+	# TODO(#45551): cmp stdout graph-1.16.txt
+
+
+# Unsupported go versions should be rejected, since we don't know
+# what versions they would report.
+! go mod graph -go=1.99999999999
+stderr '^invalid value "1\.99999999999" for flag -go: maximum supported Go version is '$goversion'\nusage: go mod graph \[-go=version\]\nRun ''go help mod graph'' for details.$'
+
+
+-- go.mod --
+// Module m indirectly imports a package from
+// example.com/retract/incompatible. Its selected version of
+// that module is lower under Go 1.17 semantics than under Go 1.16.
+module example.com/m
+
+go 1.17
+
+replace (
+	example.net/lazy v0.1.0 => ./lazy
+	example.net/requireincompatible v0.1.0 => ./requireincompatible
+)
+
+require (
+	example.com/retract/incompatible v1.0.0 // indirect
+	example.net/lazy v0.1.0
+)
+-- lazy/go.mod --
+// Module lazy requires example.com/retract/incompatible v1.0.0.
+//
+// When viewed from the outside it also has a transitive dependency
+// on v2.0.0+incompatible, but in lazy mode that transitive dependency
+// is pruned out.
+module example.net/lazy
+
+go 1.17
+
+exclude example.com/retract/incompatible v2.0.0+incompatible
+
+require (
+	example.com/retract/incompatible v1.0.0
+	example.net/requireincompatible v0.1.0
+)
+-- requireincompatible/go.mod --
+module example.net/requireincompatible
+
+go 1.15
+
+require example.com/retract/incompatible v2.0.0+incompatible
diff --git a/src/cmd/go/testdata/script/mod_init_path.txt b/src/cmd/go/testdata/script/mod_init_path.txt
index ccdfc92317..e5fd4ddbcb 100644
--- a/src/cmd/go/testdata/script/mod_init_path.txt
+++ b/src/cmd/go/testdata/script/mod_init_path.txt
@@ -1,7 +1,7 @@
 env GO111MODULE=on
 
 ! go mod init .
-stderr '^go: invalid module path "\.": is a local import path$'
+stderr '^go: malformed module path ".": is a local import path$'
 
 cd x
 go mod init example.com/x
diff --git a/src/cmd/go/testdata/script/mod_install_hint.txt b/src/cmd/go/testdata/script/mod_install_hint.txt
new file mode 100644
index 0000000000..ab02840eb8
--- /dev/null
+++ b/src/cmd/go/testdata/script/mod_install_hint.txt
@@ -0,0 +1,5 @@
+# Module is replaced but not required. No hint appears as no module is suggested.
+go mod init m
+go mod edit -replace=github.com/notrequired@v0.5.0=github.com/doesnotexist@v0.5.0
+! go install github.com/notrequired
+! stderr 'to add it:'
\ No newline at end of file
diff --git a/src/cmd/go/testdata/script/mod_install_pkg_version.txt b/src/cmd/go/testdata/script/mod_install_pkg_version.txt
index 2c14ef737b..fd02392af1 100644
--- a/src/cmd/go/testdata/script/mod_install_pkg_version.txt
+++ b/src/cmd/go/testdata/script/mod_install_pkg_version.txt
@@ -143,7 +143,7 @@ stderr '^go: warning: "example.com/cmd/nomatch\.\.\." matched no packages$'
 
 # If a wildcard matches only non-main packges, we should see a different warning.
 go install example.com/cmd/err...@v1.0.0
-stderr '^go: warning: "example.com/cmd/err\.\.\." matched no main packages$'
+stderr '^go: warning: "example.com/cmd/err\.\.\." matched only non-main packages$'
 
 
 # 'go install pkg@version' should report errors if the module contains
diff --git a/src/cmd/go/testdata/script/mod_invalid_path.txt b/src/cmd/go/testdata/script/mod_invalid_path.txt
index c8c075daae..333a3ffa35 100644
--- a/src/cmd/go/testdata/script/mod_invalid_path.txt
+++ b/src/cmd/go/testdata/script/mod_invalid_path.txt
@@ -8,11 +8,8 @@ stderr '^go: no module declaration in go.mod. To specify the module path:\n\tgo
 # Test that go mod init in GOPATH doesn't add a module declaration
 # with a path that can't possibly be a module path, because
 # it isn't even a valid import path.
-# The single quote and backtick are the only characters  we don't allow
-# in checkModulePathLax, but is allowed in a Windows file name.
-# TODO(matloob): choose a different character once
-# module.CheckImportPath is laxened and replaces
-# checkModulePathLax.
+# The single quote and backtick are the only characters which are not allowed
+# but are a valid Windows file name.
 cd $WORK/'gopath/src/m''d'
 ! go mod init
 stderr 'cannot determine module path'
@@ -21,7 +18,7 @@ stderr 'cannot determine module path'
 # possibly be a module path, because it isn't even a valid import path
 cd $WORK/gopath/src/badname
 ! go list .
-stderr 'invalid module path'
+stderr 'malformed module path'
 
 # Test that an import path containing an element with a leading dot is valid,
 # but such a module path is not.
diff --git a/src/cmd/go/testdata/script/mod_invalid_version.txt b/src/cmd/go/testdata/script/mod_invalid_version.txt
index 34d9c47674..6846a792a5 100644
--- a/src/cmd/go/testdata/script/mod_invalid_version.txt
+++ b/src/cmd/go/testdata/script/mod_invalid_version.txt
@@ -19,7 +19,7 @@ cp go.mod.orig go.mod
 go mod edit -require golang.org/x/text@14c0d48ead0c
 cd outside
 ! go list -m golang.org/x/text
-stderr 'go list -m: example.com@v0.0.0 \(replaced by \./\..\): parsing ../go.mod: '$WORK'/gopath/src/go.mod:5: require golang.org/x/text: version "14c0d48ead0c" invalid: must be of the form v1.2.3'
+stderr 'go list -m: example.com@v0.0.0 \(replaced by \./\.\.\): parsing ..[/\\]go.mod: '$WORK'[/\\]gopath[/\\]src[/\\]go.mod:5: require golang.org/x/text: version "14c0d48ead0c" invalid: must be of the form v1.2.3'
 cd ..
 go list -m golang.org/x/text
 stdout 'golang.org/x/text v0.1.1-0.20170915032832-14c0d48ead0c'
@@ -47,10 +47,10 @@ cp go.mod.orig go.mod
 go mod edit -require golang.org/x/text@v2.1.1-0.20170915032832-14c0d48ead0c
 cd outside
 ! go list -m golang.org/x/text
-stderr 'go list -m: example.com@v0.0.0 \(replaced by \./\.\.\): parsing ../go.mod: '$WORK'/gopath/src/go.mod:5: require golang.org/x/text: version "v2.1.1-0.20170915032832-14c0d48ead0c" invalid: should be v0 or v1, not v2'
+stderr 'go list -m: example.com@v0.0.0 \(replaced by \./\.\.\): parsing ..[/\\]go.mod: '$WORK'[/\\]gopath[/\\]src[/\\]go.mod:5: require golang.org/x/text: version "v2.1.1-0.20170915032832-14c0d48ead0c" invalid: should be v0 or v1, not v2'
 cd ..
 ! go list -m golang.org/x/text
-stderr $WORK'/gopath/src/go.mod:5: require golang.org/x/text: version "v2.1.1-0.20170915032832-14c0d48ead0c" invalid: should be v0 or v1, not v2'
+stderr $WORK'[/\\]gopath[/\\]src[/\\]go.mod:5: require golang.org/x/text: version "v2.1.1-0.20170915032832-14c0d48ead0c" invalid: should be v0 or v1, not v2'
 
 # A pseudo-version with fewer than 12 digits of SHA-1 prefix is invalid.
 cp go.mod.orig go.mod
diff --git a/src/cmd/go/testdata/script/mod_lazy_import_allmod.txt b/src/cmd/go/testdata/script/mod_lazy_import_allmod.txt
index 3dc1515df2..97718c4513 100644
--- a/src/cmd/go/testdata/script/mod_lazy_import_allmod.txt
+++ b/src/cmd/go/testdata/script/mod_lazy_import_allmod.txt
@@ -139,9 +139,10 @@ go 1.17
 require (
 	a v0.1.0
 	b v0.1.0
-	c v0.1.0 // indirect
 )
 
+require c v0.1.0 // indirect
+
 replace (
 	a v0.1.0 => ./a1
 	b v0.1.0 => ./b1
diff --git a/src/cmd/go/testdata/script/mod_lazy_new_import.txt b/src/cmd/go/testdata/script/mod_lazy_new_import.txt
index 86b14b64b6..4272a52de1 100644
--- a/src/cmd/go/testdata/script/mod_lazy_new_import.txt
+++ b/src/cmd/go/testdata/script/mod_lazy_new_import.txt
@@ -78,10 +78,9 @@ module example.com/lazy
 
 go 1.17
 
-require (
-	example.com/a v0.1.0
-	example.com/b v0.1.0 // indirect
-)
+require example.com/a v0.1.0
+
+require example.com/b v0.1.0 // indirect
 
 replace (
 	example.com/a v0.1.0 => ./a
@@ -94,8 +93,9 @@ module example.com/lazy
 
 go 1.17
 
+require example.com/a v0.1.0
+
 require (
-	example.com/a v0.1.0
 	example.com/b v0.1.0 // indirect
 	example.com/c v0.1.0 // indirect
 )
diff --git a/src/cmd/go/testdata/script/mod_lazy_test_of_test_dep.txt b/src/cmd/go/testdata/script/mod_lazy_test_of_test_dep.txt
index 722712d1f2..68a5b6dca2 100644
--- a/src/cmd/go/testdata/script/mod_lazy_test_of_test_dep.txt
+++ b/src/cmd/go/testdata/script/mod_lazy_test_of_test_dep.txt
@@ -148,10 +148,9 @@ module example.com/lazy
 
 go 1.17
 
-require (
-	example.com/a v0.1.0
-	example.com/b v0.1.0 // indirect
-)
+require example.com/a v0.1.0
+
+require example.com/b v0.1.0 // indirect
 
 replace (
 	example.com/a v0.1.0 => ./a
diff --git a/src/cmd/go/testdata/script/mod_list_test_cycle.txt b/src/cmd/go/testdata/script/mod_list_test_cycle.txt
new file mode 100644
index 0000000000..755e50b076
--- /dev/null
+++ b/src/cmd/go/testdata/script/mod_list_test_cycle.txt
@@ -0,0 +1,23 @@
+# https://golang.org/issue/45863: a typo in a test package leading to an
+# import cycle should be diagnosed, instead of causing an infinite loop.
+# The failure mode of this test prior to the fix was a timeout or OOM crash.
+
+go list -e -test -deps ./datastore/sql
+
+-- go.mod --
+module golang.org/issue45863
+
+go 1.17
+-- datastore/datastore_health.go --
+package datastore
+
+import (
+	"golang.org/issue45863/datastore"
+	"golang.org/issue45863/datastore/sql"
+)
+-- datastore/sql/sql.go --
+package sql
+-- datastore/sql/sql_test.go --
+package sql
+
+import _ "golang.org/issue45863/datastore"
diff --git a/src/cmd/go/testdata/script/mod_overlay.txt b/src/cmd/go/testdata/script/mod_overlay.txt
index 92e79c725a..86ab04bd3c 100644
--- a/src/cmd/go/testdata/script/mod_overlay.txt
+++ b/src/cmd/go/testdata/script/mod_overlay.txt
@@ -21,7 +21,7 @@ go list -deps -overlay overlay.json .
 cd $WORK/gopath/src/get-doesnt-add-dep
 cp $WORK/overlay/get_doesnt_add_dep_go_mod $WORK/want_go_mod
 ! go get -d -overlay overlay.json .
-stderr 'overlaid files can''t be opened for write'
+stderr '^go: updates to go.mod needed, but go.mod is part of the overlay specified with -overlay$'
 cmp $WORK/overlay/get_doesnt_add_dep_go_mod $WORK/want_go_mod
 
 # Content of overlaid go.sum is used.
@@ -41,10 +41,10 @@ go mod verify -overlay overlay.json
 # attempting to update the file
 cp incomplete-sum-file $WORK/overlay/overlay-sum-used-correct-sums
 ! go get -d -overlay overlay.json .
-stderr 'overlaid files can''t be opened for write'
+stderr '^go: updates to go.sum needed, but go.sum is part of the overlay specified with -overlay$'
 cmp incomplete-sum-file $WORK/overlay/overlay-sum-used-correct-sums
 ! go mod tidy -overlay overlay.json
-stderr 'overlaid files can''t be opened for write'
+stderr '^go: updates to go.sum needed, but go.sum is part of the overlay specified with -overlay$'
 cmp incomplete-sum-file $WORK/overlay/overlay-sum-used-correct-sums
 
 # -overlay works with -modfile.
@@ -56,7 +56,7 @@ go list -modfile=alternate.mod -overlay overlay.json .
 stdout 'found.the/module'
 # Even with -modfile, overlaid files can't be opened for write.
 ! go get -modfile=alternate.mod -overlay overlay.json -d rsc.io/quote
-stderr 'overlaid files can''t be opened for write'
+stderr '^go: updates to go.mod needed, but go.mod is part of the overlay specified with -overlay$'
 
 # Carving out a module by adding an overlaid go.mod file
 cd $WORK/gopath/src/carve
@@ -78,7 +78,7 @@ go list -overlay overlay.json all
 stdout ^carve2/nomod$
 # Editing go.mod file fails because overlay is read only
 ! go get -overlay overlay.json -d rsc.io/quote
-stderr 'overlaid files can''t be opened for write'
+stderr '^go: updates to go.mod needed, but go.mod is part of the overlay specified with -overlay$'
 ! grep rsc.io/quote $WORK/overlay/carve2-nomod-go.mod
 # Editing go.mod file succeeds because we use -modfile to redirect to same file
 go get -overlay overlay.json -modfile $WORK/overlay/carve2-nomod-go.mod -d rsc.io/quote
diff --git a/src/cmd/go/testdata/script/mod_query.txt b/src/cmd/go/testdata/script/mod_query.txt
index e10185709d..a75f86ed7c 100644
--- a/src/cmd/go/testdata/script/mod_query.txt
+++ b/src/cmd/go/testdata/script/mod_query.txt
@@ -1,9 +1,7 @@
 env GO111MODULE=on
 
-# Populate go.sum.
 # TODO(golang.org/issue/41297): we shouldn't need go.sum. None of the commands
 # below depend on the build list.
-go mod download
 
 go list -m -versions rsc.io/quote
 stdout '^rsc.io/quote v1.0.0 v1.1.0 v1.2.0 v1.2.1 v1.3.0 v1.4.0 v1.5.0 v1.5.1 v1.5.2 v1.5.3-pre1$'
@@ -36,6 +34,9 @@ stdout 'no matching versions for query ">v1.5.3"'
 module x
 require rsc.io/quote v1.0.0
 
+-- go.sum --
+rsc.io/quote v1.0.0 h1:kQ3IZQzPTiDJxSZI98YaWgxFEhlNdYASHvh+MplbViw=
+rsc.io/quote v1.0.0/go.mod h1:v83Ri/njykPcgJltBc/gEkJTmjTsNgtO1Y7vyIK1CQA=
 -- use.go --
 package use
 
diff --git a/src/cmd/go/testdata/script/mod_replace.txt b/src/cmd/go/testdata/script/mod_replace.txt
index dc9667f1d0..a0a367fb1d 100644
--- a/src/cmd/go/testdata/script/mod_replace.txt
+++ b/src/cmd/go/testdata/script/mod_replace.txt
@@ -48,7 +48,7 @@ stderr 'module rsc.io/quote/v3@upgrade found \(v3.0.0, replaced by ./local/rsc.i
 # The reported Dir and GoMod for a replaced module should be accurate.
 cp go.mod.orig go.mod
 go mod edit -replace=rsc.io/quote/v3=not-rsc.io/quote@v0.1.0-nomod
-go mod download
+go mod download rsc.io/quote/v3
 go list -m -f '{{.Path}} {{.Version}} {{.Dir}} {{.GoMod}}{{with .Replace}} => {{.Path}} {{.Version}} {{.Dir}} {{.GoMod}}{{end}}' rsc.io/quote/v3
 stdout '^rsc.io/quote/v3 v3.0.0 '$GOPATH'[/\\]pkg[/\\]mod[/\\]not-rsc.io[/\\]quote@v0.1.0-nomod '$GOPATH'[/\\]pkg[/\\]mod[/\\]cache[/\\]download[/\\]not-rsc.io[/\\]quote[/\\]@v[/\\]v0.1.0-nomod.mod => not-rsc.io/quote v0.1.0-nomod '$GOPATH'[/\\]pkg[/\\]mod[/\\]not-rsc.io[/\\]quote@v0.1.0-nomod '$GOPATH'[/\\]pkg[/\\]mod[/\\]cache[/\\]download[/\\]not-rsc.io[/\\]quote[/\\]@v[/\\]v0.1.0-nomod.mod$'
 
diff --git a/src/cmd/go/testdata/script/mod_retention.txt b/src/cmd/go/testdata/script/mod_retention.txt
index 0e639db551..7a371b1806 100644
--- a/src/cmd/go/testdata/script/mod_retention.txt
+++ b/src/cmd/go/testdata/script/mod_retention.txt
@@ -140,8 +140,9 @@ module m
 go $goversion
 
 require (
-	golang.org/x/text v0.0.0-20170915032832-14c0d48ead0c // indirect
 	rsc.io/quote v1.5.2
 	rsc.io/sampler v1.3.0 // indirect
 	rsc.io/testonly v1.0.0 // indirect
 )
+
+require golang.org/x/text v0.0.0-20170915032832-14c0d48ead0c // indirect
diff --git a/src/cmd/go/testdata/script/mod_retract.txt b/src/cmd/go/testdata/script/mod_retract.txt
index a52e05bc72..4f95ece8d7 100644
--- a/src/cmd/go/testdata/script/mod_retract.txt
+++ b/src/cmd/go/testdata/script/mod_retract.txt
@@ -1,8 +1,5 @@
 cp go.mod go.mod.orig
 
-# Populate go.sum.
-go mod download
-
 # 'go list pkg' does not report an error when a retracted version is used.
 go list -e -f '{{if .Error}}{{.Error}}{{end}}' ./use
 ! stdout .
@@ -32,6 +29,11 @@ go 1.15
 
 require example.com/retract v1.0.0-bad
 
+-- go.sum --
+example.com/retract v1.0.0-bad h1:liAW69rbtjY67x2CcNzat668L/w+YGgNX3lhJsWIJis=
+example.com/retract v1.0.0-bad/go.mod h1:0DvGGofJ9hr1q63cBrOY/jSY52OwhRGA0K47NE80I5Y=
+example.com/retract/self/prev v1.1.0 h1:0/8I/GTG+1eJTFeDQ/fUbgrMsVHHyKhh3Z8DSZp1fuA=
+example.com/retract/self/prev v1.1.0/go.mod h1:xl2EcklWuZZHVtHWcpzfSJQmnzAGpKZYpA/Wto7SZN4=
 -- use/use.go --
 package use
 
diff --git a/src/cmd/go/testdata/script/mod_run_nonmain.txt b/src/cmd/go/testdata/script/mod_run_nonmain.txt
new file mode 100644
index 0000000000..036755d2d1
--- /dev/null
+++ b/src/cmd/go/testdata/script/mod_run_nonmain.txt
@@ -0,0 +1,18 @@
+! go run $PWD
+! stderr 'no packages loaded'
+stderr '^package example.net/nonmain is not a main package$'
+
+! go run .
+stderr '^package example.net/nonmain is not a main package$'
+
+! go run ./...
+stderr '^go: warning: "\./\.\.\." matched only non-main packages$'
+stderr '^go run: no packages loaded from \./\.\.\.$'
+
+-- go.mod --
+module example.net/nonmain
+
+go 1.17
+-- nonmain.go --
+// Package nonmain is not a main package.
+package nonmain
diff --git a/src/cmd/go/testdata/script/mod_run_pkgerror.txt b/src/cmd/go/testdata/script/mod_run_pkgerror.txt
new file mode 100644
index 0000000000..48f900dd34
--- /dev/null
+++ b/src/cmd/go/testdata/script/mod_run_pkgerror.txt
@@ -0,0 +1,32 @@
+# https://golang.org/issue/39986: files reported as invalid by go/build should
+# be listed in InvalidGoFiles.
+
+go list -e -f '{{.Incomplete}}{{"\n"}}{{.Error}}{{"\n"}}{{.InvalidGoFiles}}{{"\n"}}' .
+stdout '^true\nfound packages m \(m\.go\) and main \(main\.go\) in '$PWD'\n\[main.go\]\n'
+
+
+# https://golang.org/issue/45827: 'go run .' should report the same package
+# errors as 'go build' and 'go list'.
+
+! go build
+stderr '^found packages m \(m\.go\) and main \(main\.go\) in '$PWD'$'
+
+! go list .
+stderr '^found packages m \(m\.go\) and main \(main\.go\) in '$PWD'$'
+
+! go run .
+! stderr 'no packages loaded'
+stderr '^found packages m \(m\.go\) and main \(main\.go\) in '$PWD'$'
+
+! go run ./...
+! stderr 'no packages loaded'
+stderr '^found packages m \(m\.go\) and main \(main\.go\) in '$PWD'$'
+
+-- go.mod --
+module m
+
+go 1.17
+-- m.go --
+package m
+-- main.go --
+package main
diff --git a/src/cmd/go/testdata/script/mod_sumdb_golang.txt b/src/cmd/go/testdata/script/mod_sumdb_golang.txt
index cc0b0da474..becd88b52e 100644
--- a/src/cmd/go/testdata/script/mod_sumdb_golang.txt
+++ b/src/cmd/go/testdata/script/mod_sumdb_golang.txt
@@ -10,45 +10,73 @@ go env GOSUMDB
 stdout '^sum.golang.org$'
 
 # Download direct from github.
+
 [!net] skip
 [!exec:git] skip
 env GOSUMDB=sum.golang.org
 env GOPROXY=direct
+
 go get -d rsc.io/quote@v1.5.2
 cp go.sum saved.sum
 
+
 # Download from proxy.golang.org with go.sum entry already.
 # Use 'go list' instead of 'go get' since the latter may download extra go.mod
 # files not listed in go.sum.
+
 go clean -modcache
 env GOSUMDB=
 env GOPROXY=
-go list -x -deps rsc.io/quote
+
+go list -x -m all  # Download go.mod files.
 ! stderr github
 stderr proxy.golang.org/rsc.io/quote
 ! stderr sum.golang.org/tile
 ! stderr sum.golang.org/lookup/rsc.io/quote
+
+go list -x -deps rsc.io/quote  # Download module source.
+! stderr github
+stderr proxy.golang.org/rsc.io/quote
+! stderr sum.golang.org/tile
+! stderr sum.golang.org/lookup/rsc.io/quote
+
 cmp go.sum saved.sum
 
+
 # Download again.
 # Should use the checksum database to validate new go.sum lines,
 # but not need to fetch any new data from the proxy.
+
 rm go.sum
-go list -mod=mod -x rsc.io/quote
+
+go list -mod=mod -x -m all  # Add checksums for go.mod files.
+stderr sum.golang.org/tile
 ! stderr github
 ! stderr proxy.golang.org/rsc.io/quote
-stderr sum.golang.org/tile
 stderr sum.golang.org/lookup/rsc.io/quote
+
+go list -mod=mod -x rsc.io/quote  # Add checksums for module source.
+! stderr .  # Adds checksums, but for entities already in the module cache.
+
 cmp go.sum saved.sum
 
+
 # test fallback to direct
+
 env TESTGOPROXY404=1
 go clean -modcache
 rm go.sum
-go list -mod=mod -x rsc.io/quote
+
+go list -mod=mod -x -m all  # Download go.mod files
 stderr 'proxy.golang.org.*404 testing'
 stderr github.com/rsc
+
+go list -mod=mod -x rsc.io/quote  # Download module source.
+stderr 'proxy.golang.org.*404 testing'
+stderr github.com/rsc
+
 cmp go.sum saved.sum
 
+
 -- go.mod --
 module m
diff --git a/src/cmd/go/testdata/script/mod_tidy_compat.txt b/src/cmd/go/testdata/script/mod_tidy_compat.txt
new file mode 100644
index 0000000000..e6edef5ee3
--- /dev/null
+++ b/src/cmd/go/testdata/script/mod_tidy_compat.txt
@@ -0,0 +1,95 @@
+# https://golang.org/issue/46141: 'go mod tidy' for a Go 1.17 module should by
+# default preserve enough checksums for the module to be used by Go 1.16.
+#
+# We don't have a copy of Go 1.16 handy, but we can simulate it by editing the
+# 'go' version in the go.mod file to 1.16, without actually updating the
+# requirements to match.
+
+[short] skip
+
+env MODFMT='{{with .Module}}{{.Path}} {{.Version}}{{end}}'
+
+
+# This module has the same module dependency graph in Go 1.16 as in Go 1.17,
+# but in 1.16 requires (checksums for) additional (irrelevant) go.mod files.
+#
+# The module graph under both versions looks like:
+#
+# m ---- example.com/version v1.1.0
+# |
+# + ---- example.net/lazy v0.1.0 ---- example.com/version v1.0.1
+#
+# Go 1.17 avoids loading the go.mod file for example.com/version v1.0.1
+# (because it is lower than the verison explicitly required by m,
+# and the module that requires it — m — specifies 'go 1.17').
+#
+# That go.mod file happens not to affect the final 1.16 module graph anyway,
+# so the pruned graph is equivalent to the unpruned one.
+
+cp go.mod go.mod.orig
+go mod tidy
+cmp go.mod go.mod.orig
+
+go list -m all
+cmp stdout m_all.txt
+
+go mod edit -go=1.16
+go list -m all
+cmp stdout m_all.txt
+
+
+# If we explicitly drop compatibility with 1.16, we retain fewer checksums,
+# which gives a cleaner go.sum file but causes 1.16 to fail in readonly mode.
+
+cp go.mod.orig go.mod
+go mod tidy -compat=1.17
+cmp go.mod go.mod.orig
+
+go list -m all
+cmp stdout m_all.txt
+
+go mod edit -go=1.16
+! go list -m all
+stderr '^go list -m: example.net/lazy@v0.1.0 requires\n\texample.com/version@v1.0.1: missing go.sum entry; to add it:\n\tgo mod download example.com/version$'
+
+
+-- go.mod --
+// Module m happens to have the exact same build list as what would be
+// selected under Go 1.16, but computes that build list without looking at
+// as many go.mod files.
+module example.com/m
+
+go 1.17
+
+replace example.net/lazy v0.1.0 => ./lazy
+
+require (
+	example.com/version v1.1.0
+	example.net/lazy v0.1.0
+)
+-- m_all.txt --
+example.com/m
+example.com/version v1.1.0
+example.net/lazy v0.1.0 => ./lazy
+-- compatible.go --
+package compatible
+
+import (
+	_ "example.com/version"
+	_ "example.net/lazy"
+)
+-- lazy/go.mod --
+// Module lazy requires example.com/version v1.0.1.
+//
+// However, since this module is lazy, its dependents
+// should not need checksums for that version of the module
+// unless they actually import packages from it.
+module example.net/lazy
+
+go 1.17
+
+require example.com/version v1.0.1
+-- lazy/lazy.go --
+package lazy
+
+import _ "example.com/version"
diff --git a/src/cmd/go/testdata/script/mod_tidy_compat_added.txt b/src/cmd/go/testdata/script/mod_tidy_compat_added.txt
new file mode 100644
index 0000000000..94fa79bc9f
--- /dev/null
+++ b/src/cmd/go/testdata/script/mod_tidy_compat_added.txt
@@ -0,0 +1,105 @@
+# https://golang.org/issue/46141: 'go mod tidy' for a Go 1.17 module should by
+# default preserve enough checksums for the module to be used by Go 1.16.
+#
+# We don't have a copy of Go 1.16 handy, but we can simulate it by editing the
+# 'go' version in the go.mod file to 1.16, without actually updating the
+# requirements to match.
+
+[short] skip
+
+env MODFMT='{{with .Module}}{{.Path}} {{.Version}}{{end}}'
+
+
+# For this module, Go 1.17 produces an error for one module, and Go 1.16
+# produces a different error for a different module.
+
+cp go.mod go.mod.orig
+
+! go mod tidy
+
+stderr '^example\.com/m imports\n\texample\.net/added: module example\.net/added@latest found \(v0\.3\.0, replaced by \./a1\), but does not contain package example\.net/added$'
+
+cmp go.mod go.mod.orig
+
+
+# When we run 'go mod tidy -e', we should proceed past the first error and follow
+# it with a second error describing the version descrepancy.
+#
+# We should not provide advice on how to push past the version descrepancy,
+# because the '-e' flag should already do that, writing out an otherwise-tidied
+# go.mod file.
+
+go mod tidy -e
+
+stderr '^example\.com/m imports\n\texample\.net/added: module example\.net/added@latest found \(v0\.3\.0, replaced by \./a1\), but does not contain package example\.net/added\nexample\.net/added failed to load from any module,\n\tbut go 1\.16 would load it from example\.net/added@v0\.2\.0$'
+
+! stderr '\n\tgo mod tidy'
+
+cmp go.mod go.mod.tidy
+
+
+-- go.mod --
+module example.com/m
+
+go 1.17
+
+replace (
+	example.net/added v0.1.0 => ./a1
+	example.net/added v0.2.0 => ./a2
+	example.net/added v0.3.0 => ./a1
+	example.net/lazy v0.1.0 => ./lazy
+	example.net/pruned v0.1.0 => ./pruned
+)
+
+require (
+	example.net/added v0.1.0
+	example.net/lazy v0.1.0
+)
+-- go.mod.tidy --
+module example.com/m
+
+go 1.17
+
+replace (
+	example.net/added v0.1.0 => ./a1
+	example.net/added v0.2.0 => ./a2
+	example.net/added v0.3.0 => ./a1
+	example.net/lazy v0.1.0 => ./lazy
+	example.net/pruned v0.1.0 => ./pruned
+)
+
+require example.net/lazy v0.1.0
+-- m.go --
+package m
+
+import (
+	_ "example.net/added"
+	_ "example.net/lazy"
+)
+
+-- a1/go.mod --
+module example.net/added
+
+go 1.17
+-- a2/go.mod --
+module example.net/added
+
+go 1.17
+-- a2/added.go --
+package added
+
+-- lazy/go.mod --
+module example.net/lazy
+
+go 1.17
+
+require example.net/pruned v0.1.0
+-- lazy/lazy.go --
+package lazy
+
+-- pruned/go.mod --
+module example.net/pruned
+
+go 1.17
+
+require example.net/added v0.2.0
diff --git a/src/cmd/go/testdata/script/mod_tidy_compat_ambiguous.txt b/src/cmd/go/testdata/script/mod_tidy_compat_ambiguous.txt
new file mode 100644
index 0000000000..c544cb7413
--- /dev/null
+++ b/src/cmd/go/testdata/script/mod_tidy_compat_ambiguous.txt
@@ -0,0 +1,98 @@
+# https://golang.org/issue/46141: 'go mod tidy' for a Go 1.17 module should by
+# default preserve enough checksums for the module to be used by Go 1.16.
+#
+# We don't have a copy of Go 1.16 handy, but we can simulate it by editing the
+# 'go' version in the go.mod file to 1.16, without actually updating the
+# requirements to match.
+
+[short] skip
+
+env MODFMT='{{with .Module}}{{.Path}} {{.Version}}{{end}}'
+
+# For this module, the dependency providing package
+# example.net/ambiguous/nested/pkg is unambiguous in Go 1.17 (because only one
+# root of the module graph contains the package), whereas it is ambiguous in
+# Go 1.16 (because two different modules contain plausible packages and Go 1.16
+# does not privilege roots above other dependencies).
+#
+# However, the overall build list is identical for both versions.
+
+cp go.mod go.mod.orig
+
+! go mod tidy
+
+stderr '^example\.com/m imports\n\texample\.net/indirect imports\n\texample\.net/ambiguous/nested/pkg loaded from example\.net/ambiguous/nested@v0\.1\.0,\n\tbut go 1.16 would fail to locate it:\n\tambiguous import: found package example\.net/ambiguous/nested/pkg in multiple modules:\n\texample\.net/ambiguous v0.1.0 \(.*\)\n\texample\.net/ambiguous/nested v0.1.0 \(.*\)\n\n'
+
+stderr '\n\nTo proceed despite packages unresolved in go 1\.16:\n\tgo mod tidy -e\nIf reproducibility with go 1.16 is not needed:\n\tgo mod tidy -compat=1\.17\nFor other options, see:\n\thttps://golang\.org/doc/modules/pruning\n'
+
+cmp go.mod go.mod.orig
+
+
+# If we run 'go mod tidy -e', we should still save enough checksums to run
+# 'go list -m all' reproducibly with go 1.16, even though we can't list
+# the specific package.
+
+go mod tidy -e
+! stderr '\n\tgo mod tidy'
+cmp go.mod go.mod.orig
+
+go list -m all
+cmp stdout all-m.txt
+
+go list -f $MODFMT example.net/ambiguous/nested/pkg
+stdout '^example.net/ambiguous/nested v0\.1\.0$'
+! stderr .
+
+go mod edit -go=1.16
+go list -m all
+cmp stdout all-m.txt
+
+! go list -f $MODFMT example.net/ambiguous/nested/pkg
+stderr '^ambiguous import: found package example\.net/ambiguous/nested/pkg in multiple modules:\n\texample\.net/ambiguous v0\.1\.0 \(.*\)\n\texample\.net/ambiguous/nested v0\.1\.0 \(.*\)\n'
+
+
+# On the other hand, if we use -compat=1.17, 1.16 can't even load
+# the build list (due to missing checksums).
+
+cp go.mod.orig go.mod
+go mod tidy -compat=1.17
+! stderr .
+go list -m all
+cmp stdout all-m.txt
+
+go mod edit -go=1.16
+! go list -m all
+stderr '^go list -m: example\.net/indirect@v0\.1\.0 requires\n\texample\.net/ambiguous@v0\.1\.0: missing go\.sum entry; to add it:\n\tgo mod download example\.net/ambiguous\n'
+
+
+-- go.mod --
+module example.com/m
+
+go 1.17
+
+replace example.net/indirect v0.1.0 => ./indirect
+
+require (
+	example.net/ambiguous/nested v0.1.0 // indirect
+	example.net/indirect v0.1.0
+)
+-- all-m.txt --
+example.com/m
+example.net/ambiguous v0.1.0
+example.net/ambiguous/nested v0.1.0
+example.net/indirect v0.1.0 => ./indirect
+-- m.go --
+package m
+
+import _ "example.net/indirect"
+
+-- indirect/go.mod --
+module example.net/indirect
+
+go 1.17
+
+require example.net/ambiguous v0.1.0
+-- indirect/indirect.go --
+package indirect
+
+import _ "example.net/ambiguous/nested/pkg"
diff --git a/src/cmd/go/testdata/script/mod_tidy_compat_deleted.txt b/src/cmd/go/testdata/script/mod_tidy_compat_deleted.txt
new file mode 100644
index 0000000000..dcf13e2049
--- /dev/null
+++ b/src/cmd/go/testdata/script/mod_tidy_compat_deleted.txt
@@ -0,0 +1,128 @@
+# https://golang.org/issue/46141: 'go mod tidy' for a Go 1.17 module should by
+# default preserve enough checksums for the module to be used by Go 1.16.
+#
+# We don't have a copy of Go 1.16 handy, but we can simulate it by editing the
+# 'go' version in the go.mod file to 1.16, without actually updating the
+# requirements to match.
+
+[short] skip
+
+env MODFMT='{{with .Module}}{{.Path}} {{.Version}}{{end}}'
+
+
+# For this module, the "deleted" dependency contains an imported package, but
+# Go 1.16 selects a higher version (in which that package has been deleted).
+
+cp go.mod go.mod.orig
+
+! go mod tidy
+
+stderr '^example\.com/m imports\n\texample\.net/deleted loaded from example\.net/deleted@v0\.1\.0,\n\tbut go 1\.16 would fail to locate it in example\.net/deleted@v0\.2\.0\n\n'
+
+stderr '\n\nTo upgrade to the versions selected by go 1.16, leaving some packages unresolved:\n\tgo mod tidy -e -go=1\.16 && go mod tidy -e -go=1\.17\nIf reproducibility with go 1.16 is not needed:\n\tgo mod tidy -compat=1\.17\nFor other options, see:\n\thttps://golang\.org/doc/modules/pruning\n'
+
+
+# The suggested 'go mod tidy -e' command should proceed anyway.
+
+go mod tidy -e
+cmp go.mod go.mod.tidy
+
+
+# In 'go 1.16' mode we should error out in the way we claimed.
+
+cd 116-outside
+! go list -deps -f $MODFMT example.com/m
+stderr '^\.\.[/\\]m\.go:4:2: no required module provides package example\.net/deleted; to add it:\n\tgo get example\.net/deleted$'
+cd ..
+
+go mod edit -go=1.16
+! go list -deps -f $MODFMT example.com/m
+stderr '^go: updates to go\.mod needed; to update it:\n\tgo mod tidy$'
+
+! go mod tidy
+stderr '^example\.com/m imports\n\texample\.net/deleted: module example\.net/deleted@latest found \(v0\.2\.0, replaced by \./d2\), but does not contain package example\.net/deleted$'
+
+
+-- go.mod --
+module example.com/m
+
+go 1.17
+
+replace (
+	example.net/deleted v0.1.0 => ./d1
+	example.net/deleted v0.2.0 => ./d2
+	example.net/lazy v0.1.0 => ./lazy
+	example.net/pruned v0.1.0 => ./pruned
+)
+
+require (
+	example.net/deleted v0.1.0
+	example.net/deleted v0.1.0 // redundant
+	example.net/lazy v0.1.0
+)
+-- go.mod.tidy --
+module example.com/m
+
+go 1.17
+
+replace (
+	example.net/deleted v0.1.0 => ./d1
+	example.net/deleted v0.2.0 => ./d2
+	example.net/lazy v0.1.0 => ./lazy
+	example.net/pruned v0.1.0 => ./pruned
+)
+
+require (
+	example.net/deleted v0.1.0
+	example.net/lazy v0.1.0
+)
+-- 116-outside/go.mod --
+module outside
+
+go 1.16
+
+replace (
+	example.com/m => ../
+	example.net/deleted v0.1.0 => ../d1
+	example.net/deleted v0.2.0 => ../d2
+	example.net/lazy v0.1.0 => ../lazy
+	example.net/pruned v0.1.0 => ../pruned
+)
+
+require example.com/m v0.1.0
+-- m.go --
+package m
+
+import (
+	_ "example.net/deleted"
+	_ "example.net/lazy"
+)
+
+-- d1/go.mod --
+module example.net/deleted
+
+go 1.17
+-- d1/deleted.go --
+package deleted
+-- d2/go.mod --
+module example.net/deleted
+
+go 1.17
+-- d2/README --
+There is no longer a Go package here.
+
+-- lazy/go.mod --
+module example.net/lazy
+
+go 1.17
+
+require example.net/pruned v0.1.0
+-- lazy/lazy.go --
+package lazy
+
+-- pruned/go.mod --
+module example.net/pruned
+
+go 1.17
+
+require example.net/deleted v0.2.0
diff --git a/src/cmd/go/testdata/script/mod_tidy_compat_implicit.txt b/src/cmd/go/testdata/script/mod_tidy_compat_implicit.txt
new file mode 100644
index 0000000000..186a3f8e67
--- /dev/null
+++ b/src/cmd/go/testdata/script/mod_tidy_compat_implicit.txt
@@ -0,0 +1,129 @@
+# https://golang.org/issue/46141: 'go mod tidy' for a Go 1.17 module should by
+# default preserve enough checksums for the module to be used by Go 1.16.
+#
+# We don't have a copy of Go 1.16 handy, but we can simulate it by editing the
+# 'go' version in the go.mod file to 1.16, without actually updating the
+# requirements to match.
+
+[short] skip
+
+env MODFMT='{{with .Module}}{{.Path}} {{.Version}}{{end}}'
+
+
+# For this module, Go 1.16 selects the same versions of all explicit dependencies
+# as Go 1.17 does. However, Go 1.16 selects a higher version of an *implicit*
+# dependency, imported by a test of one of the (external) imported packages.
+# As a result, Go 1.16 also needs checksums for the module sources for that higher
+# version.
+#
+# The Go 1.16 module graph looks like:
+#
+# m ---- lazy v0.1.0 ---- incompatible v1.0.0
+#         |
+#         + ------------- requireincompatible v0.1.0 ---- incompatible v2.0.0+incompatible
+#
+# The Go 1.17 module graph is the same except that the dependencies of
+# requireincompatible are pruned out (because the module that requires
+# it — lazy v0.1.0 — specifies 'go 1.17', and it is not otherwise relevant to
+# the main module).
+
+# 'go mod tidy' should by default diagnose the difference in dependencies as an
+# error, with useful suggestions about how to resolve it.
+
+cp go.mod go.mod.orig
+! go mod tidy
+stderr '^example\.com/m imports\n\texample\.net/lazy tested by\n\texample\.net/lazy.test imports\n\texample\.com/retract/incompatible loaded from example\.com/retract/incompatible@v1\.0\.0,\n\tbut go 1\.16 would select v2\.0\.0\+incompatible\n\n'
+stderr '\n\nTo upgrade to the versions selected by go 1\.16:\n\tgo mod tidy -go=1\.16 && go mod tidy -go=1\.17\nIf reproducibility with go 1.16 is not needed:\n\tgo mod tidy -compat=1.17\nFor other options, see:\n\thttps://golang\.org/doc/modules/pruning\n'
+
+cmp go.mod go.mod.orig
+
+# The suggested '-compat' flag to ignore differences should silence the error
+# and leave go.mod unchanged, resulting in checksum errors when Go 1.16 tries
+# to load a module pruned out by Go 1.17.
+
+go mod tidy -compat=1.17
+! stderr .
+cmp go.mod go.mod.orig
+
+go list -deps -test -f $MODFMT all
+stdout '^example\.com/retract/incompatible v1\.0\.0$'
+
+go mod edit -go=1.16
+! go list -deps -test -f $MODFMT all
+
+	# TODO(#46160): -count=1 instead of -count=2.
+stderr -count=2 '^go: example\.net/lazy@v0\.1\.0 requires\n\texample\.com/retract/incompatible@v1\.0\.0: missing go\.sum entry; to add it:\n\tgo mod download example\.com/retract/incompatible$'
+
+
+# If we combine a Go 1.16 go.sum file...
+go mod tidy -go=1.16
+
+# ...with a Go 1.17 go.mod file...
+cp go.mod.orig go.mod
+
+# ...then Go 1.17 no longer works. 😞
+! go list -deps -test -f $MODFMT all
+stderr -count=1 '^can''t load test package: lazy[/\\]lazy_test.go:3:8: missing go\.sum entry for module providing package example\.com/retract/incompatible \(imported by example\.net/lazy\); to add:\n\tgo get -t example.net/lazy@v0\.1\.0$'
+
+
+# However, if we take the union of the go.sum files...
+go list -mod=mod -deps -test all
+cmp go.mod go.mod.orig
+
+# ...then Go 1.17 continues to work...
+go list -deps -test -f $MODFMT all
+stdout '^example\.com/retract/incompatible v1\.0\.0$'
+
+# ...and 1.16 also works(‽), but selects a different version for the
+# external-test dependency.
+go mod edit -go=1.16
+go list -deps -test -f $MODFMT all
+stdout '^example\.com/retract/incompatible v2\.0\.0\+incompatible$'
+
+
+-- go.mod --
+// Module m imports packages from the same versions under Go 1.17
+// as under Go 1.16, but under 1.16 its (implicit) external test dependencies
+// are higher.
+module example.com/m
+
+go 1.17
+
+replace (
+	example.net/lazy v0.1.0 => ./lazy
+	example.net/requireincompatible v0.1.0 => ./requireincompatible
+)
+
+require example.net/lazy v0.1.0
+-- implicit.go --
+package implicit
+
+import _ "example.net/lazy"
+-- lazy/go.mod --
+// Module lazy requires example.com/retract/incompatible v1.0.0.
+//
+// When viewed from the outside it also has a transitive dependency
+// on v2.0.0+incompatible, but in lazy mode that transitive dependency
+// is pruned out.
+module example.net/lazy
+
+go 1.17
+
+exclude example.com/retract/incompatible v2.0.0+incompatible
+
+require (
+	example.com/retract/incompatible v1.0.0
+	example.net/requireincompatible v0.1.0
+)
+-- lazy/lazy.go --
+package lazy
+-- lazy/lazy_test.go --
+package lazy_test
+
+import _ "example.com/retract/incompatible"
+-- requireincompatible/go.mod --
+module example.net/requireincompatible
+
+go 1.15
+
+require example.com/retract/incompatible v2.0.0+incompatible
diff --git a/src/cmd/go/testdata/script/mod_tidy_compat_incompatible.txt b/src/cmd/go/testdata/script/mod_tidy_compat_incompatible.txt
new file mode 100644
index 0000000000..ea9e42e87e
--- /dev/null
+++ b/src/cmd/go/testdata/script/mod_tidy_compat_incompatible.txt
@@ -0,0 +1,135 @@
+# https://golang.org/issue/46141: 'go mod tidy' for a Go 1.17 module should by
+# default preserve enough checksums for the module to be used by Go 1.16.
+#
+# We don't have a copy of Go 1.16 handy, but we can simulate it by editing the
+# 'go' version in the go.mod file to 1.16, without actually updating the
+# requirements to match.
+
+[short] skip
+
+env MODFMT='{{with .Module}}{{.Path}} {{.Version}}{{end}}'
+
+
+# For this module, Go 1.17 prunes out a (transitive and otherwise-irrelevant)
+# requirement on a retracted higher version of a dependency.
+# However, when Go 1.16 reads the same requirements from the go.mod file,
+# it does not prune out that requirement, and selects the retracted version.
+#
+# The Go 1.16 module graph looks like:
+#
+# m ---- lazy v0.1.0 ---- requireincompatible v0.1.0 ---- incompatible v2.0.0+incompatible
+# |        |
+# + -------+------------- incompatible v1.0.0
+#
+# The Go 1.17 module graph is the same except that the dependencies of
+# requireincompatible are pruned out (because the module that requires
+# it — lazy v0.1.0 — specifies 'go 1.17', and it is not otherwise relevant to
+# the main module).
+
+
+# 'go mod tidy' should by default diagnose the difference in dependencies as an
+# error, with useful suggestions about how to resolve it.
+
+cp go.mod go.mod.orig
+! go mod tidy
+stderr '^example\.com/m imports\n\texample\.net/lazy imports\n\texample\.com/retract/incompatible loaded from example\.com/retract/incompatible@v1\.0\.0,\n\tbut go 1\.16 would select v2\.0\.0\+incompatible\n\n'
+stderr '\n\nTo upgrade to the versions selected by go 1\.16:\n\tgo mod tidy -go=1\.16 && go mod tidy -go=1\.17\nIf reproducibility with go 1\.16 is not needed:\n\tgo mod tidy -compat=1.17\nFor other options, see:\n\thttps://golang\.org/doc/modules/pruning\n'
+
+cmp go.mod go.mod.orig
+
+
+# The suggested '-compat' flag to ignore differences should silence the error
+# and leave go.mod unchanged, resulting in checksum errors when Go 1.16 tries
+# to load a module pruned out by Go 1.17.
+
+go mod tidy -compat=1.17
+! stderr .
+cmp go.mod go.mod.orig
+
+go mod edit -go=1.16
+! go list -f $MODFMT -deps ./...
+	# TODO(#46160): -count=1 instead of -count=2.
+stderr -count=2 '^go: example\.net/lazy@v0\.1\.0 requires\n\texample\.net/requireincompatible@v0\.1\.0 requires\n\texample\.com/retract/incompatible@v2\.0\.0\+incompatible: missing go.sum entry; to add it:\n\tgo mod download example.com/retract/incompatible$'
+
+
+# There are two ways for the module author to bring the two into alignment.
+# One is to *explicitly* 'exclude' the version that is already *implicitly*
+# pruned out under 1.17.
+
+go mod edit -exclude=example.com/retract/incompatible@v2.0.0+incompatible
+go list -f $MODFMT -deps ./...
+stdout '^example.com/retract/incompatible v1\.0\.0$'
+! stdout 'v2\.0\.0'
+
+
+# The other is to explicitly upgrade the version required under Go 1.17
+# to match the version selected by Go 1.16. The commands suggested by
+# 'go mod tidy' should do exactly that.
+
+cp go.mod.orig go.mod
+
+go mod tidy -go=1.16
+go list -f $MODFMT -deps ./...
+stdout '^example.com/retract/incompatible v2\.0\.0\+incompatible$'
+! stdout 'v1\.0\.0'
+
+go mod tidy -go=1.17
+go list -f $MODFMT -deps ./...
+stdout '^example.com/retract/incompatible v2\.0\.0\+incompatible$'
+! stdout 'v1\.0\.0'
+
+go mod edit -go=1.16
+go list -f $MODFMT -deps ./...
+stdout '^example.com/retract/incompatible v2\.0\.0\+incompatible$'
+! stdout 'v1\.0\.0'
+
+
+-- go.mod --
+// Module m indirectly imports a package from
+// example.com/retract/incompatible. Its selected version of
+// that module is lower under Go 1.17 semantics than under Go 1.16.
+module example.com/m
+
+go 1.17
+
+replace (
+	example.net/lazy v0.1.0 => ./lazy
+	example.net/requireincompatible v0.1.0 => ./requireincompatible
+)
+
+require (
+	example.com/retract/incompatible v1.0.0 // indirect
+	example.net/lazy v0.1.0
+)
+-- incompatible.go --
+package incompatible
+
+import _ "example.net/lazy"
+
+-- lazy/go.mod --
+// Module lazy requires example.com/retract/incompatible v1.0.0.
+//
+// When viewed from the outside it also has a transitive dependency
+// on v2.0.0+incompatible, but in lazy mode that transitive dependency
+// is pruned out.
+module example.net/lazy
+
+go 1.17
+
+exclude example.com/retract/incompatible v2.0.0+incompatible
+
+require (
+	example.com/retract/incompatible v1.0.0
+	example.net/requireincompatible v0.1.0
+)
+-- lazy/lazy.go --
+package lazy
+
+import _ "example.com/retract/incompatible"
+
+-- requireincompatible/go.mod --
+module example.net/requireincompatible
+
+go 1.15
+
+require example.com/retract/incompatible v2.0.0+incompatible
diff --git a/src/cmd/go/testdata/script/mod_tidy_compat_irrelevant.txt b/src/cmd/go/testdata/script/mod_tidy_compat_irrelevant.txt
new file mode 100644
index 0000000000..7c22fca6c0
--- /dev/null
+++ b/src/cmd/go/testdata/script/mod_tidy_compat_irrelevant.txt
@@ -0,0 +1,99 @@
+# https://golang.org/issue/46141: 'go mod tidy' for a Go 1.17 module should by
+# default preserve enough checksums for the module to be used by Go 1.16.
+#
+# We don't have a copy of Go 1.16 handy, but we can simulate it by editing the
+# 'go' version in the go.mod file to 1.16, without actually updating the
+# requirements to match.
+
+[short] skip
+
+env MODFMT='{{with .Module}}{{.Path}} {{.Version}}{{end}}'
+
+
+# This module selects the same versions in Go 1.16 and 1.17 for all modules
+# that provide packages (or test dependencies of packages) imported by the
+# main module. However, in Go 1.16 it selects a higher version of a
+# transitive module dependency that is not otherwise relevant to the main module.
+# As a result, Go 1.16 needs an additional checksum for the go.mod file of
+# that irrelevant dependency.
+#
+# The Go 1.16 module graph looks like:
+#
+# m ---- lazy v0.1.0 ---- incompatible v1.0.0
+#         |
+#         + ------------- requireincompatible v0.1.0 ---- incompatible v2.0.0+incompatible
+
+cp go.mod go.mod.orig
+go mod tidy
+cmp go.mod go.mod.orig
+
+go list -deps -test -f $MODFMT all
+cp stdout out-117.txt
+
+go mod edit -go=1.16
+go list -deps -test -f $MODFMT all
+cmp stdout out-117.txt
+
+
+# If we explicitly drop compatibility with 1.16, we retain fewer checksums,
+# which gives a cleaner go.sum file but causes 1.16 to fail in readonly mode.
+
+cp go.mod.orig go.mod
+go mod tidy -compat=1.17
+cmp go.mod go.mod.orig
+
+go list -deps -test -f $MODFMT all
+cmp stdout out-117.txt
+
+go mod edit -go=1.16
+! go list -deps -test -f $MODFMT all
+	# TODO(#46160): -count=1 instead of -count=2.
+stderr -count=2 '^go: example.net/lazy@v0.1.0 requires\n\texample.com/retract/incompatible@v1.0.0: missing go.sum entry; to add it:\n\tgo mod download example.com/retract/incompatible$'
+
+
+-- go.mod --
+// Module m imports packages from the same versions under Go 1.17
+// as under Go 1.16, but under 1.16 its (implicit) external test dependencies
+// are higher.
+module example.com/m
+
+go 1.17
+
+replace (
+	example.net/lazy v0.1.0 => ./lazy
+	example.net/requireincompatible v0.1.0 => ./requireincompatible
+)
+
+require example.net/lazy v0.1.0
+-- m.go --
+package m
+
+import _ "example.net/lazy"
+-- lazy/go.mod --
+// Module lazy requires example.com/retract/incompatible v1.0.0.
+//
+// When viewed from the outside it also has a transitive dependency
+// on v2.0.0+incompatible, but in lazy mode that transitive dependency
+// is pruned out.
+module example.net/lazy
+
+go 1.17
+
+exclude example.com/retract/incompatible v2.0.0+incompatible
+
+require (
+	example.com/retract/incompatible v1.0.0
+	example.net/requireincompatible v0.1.0
+)
+-- lazy/lazy.go --
+package lazy
+-- lazy/unimported/unimported.go --
+package unimported
+
+import _ "example.com/retract/incompatible"
+-- requireincompatible/go.mod --
+module example.net/requireincompatible
+
+go 1.15
+
+require example.com/retract/incompatible v2.0.0+incompatible
diff --git a/src/cmd/go/testdata/script/mod_tidy_convergence.txt b/src/cmd/go/testdata/script/mod_tidy_convergence.txt
index 22c8fc66c5..09c46f764b 100644
--- a/src/cmd/go/testdata/script/mod_tidy_convergence.txt
+++ b/src/cmd/go/testdata/script/mod_tidy_convergence.txt
@@ -90,7 +90,6 @@ cmp go.mod go.mod.postget
 cp go.mod.orig go.mod
 go mod edit -go=1.17 go.mod
 go mod edit -go=1.17 go.mod.tidye
-go mod edit -go=1.17 go.mod.postget
 
 go mod tidy -e
 cmp go.mod go.mod.tidye
@@ -99,7 +98,7 @@ stderr '^example\.net/m imports\n\texample\.net/x: package example\.net/x provid
 
 go get -d example.net/x@v0.1.0 example.net/y@v0.1.0
 go mod tidy
-cmp go.mod go.mod.postget
+cmp go.mod go.mod.postget-117
 
 
 -- go.mod --
@@ -144,6 +143,21 @@ require (
 	example.net/x v0.1.0
 	example.net/y v0.1.0 // indirect
 )
+-- go.mod.postget-117 --
+module example.net/m
+
+go 1.17
+
+replace (
+	example.net/x v0.1.0 => ./x1
+	example.net/x v0.2.0-pre => ./x2-pre
+	example.net/y v0.1.0 => ./y1
+	example.net/y v0.2.0 => ./y2
+)
+
+require example.net/x v0.1.0
+
+require example.net/y v0.1.0 // indirect
 -- m.go --
 package m
 
diff --git a/src/cmd/go/testdata/script/mod_tidy_lazy_self.txt b/src/cmd/go/testdata/script/mod_tidy_lazy_self.txt
new file mode 100644
index 0000000000..ffcea18603
--- /dev/null
+++ b/src/cmd/go/testdata/script/mod_tidy_lazy_self.txt
@@ -0,0 +1,71 @@
+# Regression test for https://golang.org/issue/46078:
+# 'go mod tidy' should not panic if the main module initially
+# requires an older version of itself.
+
+
+# A module that explicitly requires an older version of itself should be
+# rejected as inconsistent: we enforce that every explicit requirement is the
+# selected version of its module path, but the selected version of the main
+# module is always itself — not some explicit version.
+
+! go list -m all
+stderr '^go: updates to go\.mod needed; to update it:\n\tgo mod tidy$'
+
+
+# The suggested 'go mod tidy' command should succeed (not crash).
+
+go mod tidy
+
+
+# We prune out redundant roots very early on in module loading, and at that
+# point the indirect requirement on example.net/x v0.1.0 appears to be
+# irrelevant. It should be pruned out; when the import of "example.net/x" is
+# later resolved, it should resolve at the latest version (v0.2.0), not the
+# version implied by the (former) misleading requirement on the older version of
+# the main module.
+
+cmp go.mod go.mod.tidy
+
+
+-- go.mod --
+module golang.org/issue/46078
+
+go 1.17
+
+replace (
+	example.net/x v0.1.0 => ./x
+	example.net/x v0.2.0 => ./x
+	golang.org/issue/46078 v0.1.0 => ./old
+)
+
+require golang.org/issue/46078 v0.1.0
+-- go.mod.tidy --
+module golang.org/issue/46078
+
+go 1.17
+
+replace (
+	example.net/x v0.1.0 => ./x
+	example.net/x v0.2.0 => ./x
+	golang.org/issue/46078 v0.1.0 => ./old
+)
+
+require example.net/x v0.2.0
+-- issue46078/issue.go --
+package issue46078
+
+import _ "example.net/x"
+
+-- old/go.mod --
+module golang.org/issue/46078
+
+go 1.17
+
+require example.net/x v0.1.0
+
+-- x/go.mod --
+module example.net/x
+
+go 1.17
+-- x/x.go --
+package x
diff --git a/src/cmd/go/testdata/script/mod_tidy_oldgo.txt b/src/cmd/go/testdata/script/mod_tidy_oldgo.txt
new file mode 100644
index 0000000000..0e88b068a7
--- /dev/null
+++ b/src/cmd/go/testdata/script/mod_tidy_oldgo.txt
@@ -0,0 +1,21 @@
+# Modules were introduced in Go 1.11, but for various reasons users may
+# decide to declare a (much!) older go version in their go.mod file.
+# Modules with very old versions should not be rejected, and should have
+# the same module-graph semantics as in Go 1.11.
+
+cp go.mod go.mod.orig
+go mod tidy
+cmp go.mod go.mod.orig
+
+-- go.mod --
+module example.com/legacy/go1
+
+go 1.0
+
+require golang.org/x/text v0.3.0
+-- main.go --
+package main
+
+import _ "golang.org/x/text/language"
+
+func main() {}
diff --git a/src/cmd/go/testdata/script/mod_tidy_replace_old.txt b/src/cmd/go/testdata/script/mod_tidy_replace_old.txt
new file mode 100644
index 0000000000..cfd3792600
--- /dev/null
+++ b/src/cmd/go/testdata/script/mod_tidy_replace_old.txt
@@ -0,0 +1,34 @@
+# Regression test for https://golang.org/issue/46659.
+#
+# If a 'replace' directive specifies an older-than-selected version of a module,
+# 'go mod tidy' shouldn't try to add that version to the build list to resolve a
+# missing package: it won't be selected, and would cause the module loader to
+# loop indefinitely trying to resolve the package.
+
+cp go.mod go.mod.orig
+
+! go mod tidy
+! stderr panic
+stderr '^golang\.org/issue46659 imports\n\texample\.com/missingpkg/deprecated: package example\.com/missingpkg/deprecated provided by example\.com/missingpkg at latest version v1\.0\.0 but not at required version v1\.0\.1-beta$'
+
+go mod tidy -e
+
+cmp go.mod go.mod.orig
+
+-- go.mod --
+module golang.org/issue46659
+
+go 1.17
+
+replace example.com/missingpkg v1.0.1-alpha => example.com/missingpkg v1.0.0
+
+require example.com/usemissingpre v1.0.0
+
+require example.com/missingpkg v1.0.1-beta // indirect
+-- m.go --
+package m
+
+import (
+	_ "example.com/missingpkg/deprecated"
+	_ "example.com/usemissingpre"
+)
diff --git a/src/cmd/go/testdata/script/mod_tidy_too_new.txt b/src/cmd/go/testdata/script/mod_tidy_too_new.txt
new file mode 100644
index 0000000000..b9c53b510d
--- /dev/null
+++ b/src/cmd/go/testdata/script/mod_tidy_too_new.txt
@@ -0,0 +1,57 @@
+# https://golang.org/issue/46142: 'go mod tidy' should error out if the version
+# in the go.mod file is newer than the most recent supported version.
+
+cp go.mod go.mod.orig
+
+
+# If the go.mod file specifies an unsupported Go version, 'go mod tidy' should
+# refuse to edit it: we don't know what a tidy go.mod file for that version
+# would look like.
+
+! go mod tidy
+stderr 'go mod tidy: go.mod file indicates go 2000.0, but maximum supported version is '$goversion'$'
+cmp go.mod go.mod.orig
+
+
+# The -e flag should push past the error and edit the file anyway,
+# but preserve the too-high version.
+
+cp go.mod.orig go.mod
+go mod tidy -e
+stderr 'go mod tidy: go.mod file indicates go 2000.0, but maximum supported version is '$goversion'$'
+cmp go.mod go.mod.tidy
+
+
+# Explicitly switching to a supported version should suppress the error completely.
+
+cp go.mod.orig go.mod
+go mod tidy -go=1.17
+! stderr 'maximum supported version'
+go mod edit -go=1.17 go.mod.tidy
+cmp go.mod go.mod.tidy
+
+
+-- go.mod --
+module example.net/from/the/future
+
+go 2000.0
+
+replace example.net/m v0.0.0 => ./m
+-- go.mod.tidy --
+module example.net/from/the/future
+
+go 2000.0
+
+replace example.net/m v0.0.0 => ./m
+
+require example.net/m v0.0.0
+-- x.go --
+package x
+
+import "example.net/m"
+-- m/go.mod --
+module example.net/m
+
+go 1.17
+-- m/m.go --
+package m
diff --git a/src/cmd/go/testdata/script/mod_tidy_version.txt b/src/cmd/go/testdata/script/mod_tidy_version.txt
index 5441d9cc06..3bc97bcb1e 100644
--- a/src/cmd/go/testdata/script/mod_tidy_version.txt
+++ b/src/cmd/go/testdata/script/mod_tidy_version.txt
@@ -32,12 +32,22 @@
 
 cp go.mod go.mod.orig
 
+
 # An invalid argument should be rejected.
 
 ! go mod tidy -go=bananas
-stderr '^go mod: invalid -go option "bananas"; expecting something like "-go 1.17"$'
+stderr '^invalid value "bananas" for flag -go: expecting a Go version like "'$goversion'"$'
 cmp go.mod go.mod.orig
 
+! go mod tidy -go=0.9
+stderr '^invalid value "0.9" for flag -go: expecting a Go version like "'$goversion'"$'
+
+! go mod tidy -go=2000.0
+stderr '^invalid value "2000.0" for flag -go: maximum supported Go version is '$goversion'$'
+
+
+# Supported versions should change the go.mod file to be tidy according to the
+# indicated version.
 
 go mod tidy -go=1.15
 cmp go.mod go.mod.115
@@ -82,8 +92,9 @@ cmpenv go.mod go.mod.latest
 -- go.mod --
 module example.com/m
 
+require example.net/a v0.1.0
+
 require (
-	example.net/a v0.1.0
 	example.net/c v0.1.0 // indirect
 	example.net/d v0.1.0 // indirect
 )
@@ -108,8 +119,9 @@ module example.com/m
 
 go 1.15
 
+require example.net/a v0.1.0
+
 require (
-	example.net/a v0.1.0
 	example.net/c v0.1.0 // indirect
 	example.net/d v0.1.0 // indirect
 )
@@ -129,8 +141,9 @@ module example.com/m
 
 go 1.15
 
+require example.net/a v0.1.0
+
 require (
-	example.net/a v0.1.0
 	example.net/c v0.1.0 // indirect
 	example.net/d v0.2.0 // indirect
 )
@@ -150,10 +163,9 @@ module example.com/m
 
 go 1.16
 
-require (
-	example.net/a v0.1.0
-	example.net/c v0.1.0 // indirect
-)
+require example.net/a v0.1.0
+
+require example.net/c v0.1.0 // indirect
 
 replace (
 	example.net/a v0.1.0 => ./a
@@ -170,8 +182,9 @@ module example.com/m
 
 go 1.17
 
+require example.net/a v0.1.0
+
 require (
-	example.net/a v0.1.0
 	example.net/b v0.1.0 // indirect
 	example.net/c v0.1.0 // indirect
 )
@@ -191,8 +204,9 @@ module example.com/m
 
 go $goversion
 
+require example.net/a v0.1.0
+
 require (
-	example.net/a v0.1.0
 	example.net/b v0.1.0 // indirect
 	example.net/c v0.1.0 // indirect
 )
diff --git a/src/cmd/go/testdata/script/mod_update_sum_readonly.txt b/src/cmd/go/testdata/script/mod_update_sum_readonly.txt
new file mode 100644
index 0000000000..41f12e4084
--- /dev/null
+++ b/src/cmd/go/testdata/script/mod_update_sum_readonly.txt
@@ -0,0 +1,34 @@
+# When finding the latest version of a module, we should not download version
+# contents. Previously, we downloaded .zip files to determine whether a real
+# .mod file was present in order to decide whether +incompatible versions
+# could be "latest".
+#
+# Verifies #47377.
+
+# rsc.io/breaker has two versions, neither of which has a .mod file.
+go list -m -versions rsc.io/breaker
+stdout '^rsc.io/breaker v1.0.0 v2.0.0\+incompatible$'
+go mod download rsc.io/breaker@v1.0.0
+! grep '^go' $GOPATH/pkg/mod/cache/download/rsc.io/breaker/@v/v1.0.0.mod
+go mod download rsc.io/breaker@v2.0.0+incompatible
+! grep '^go' $GOPATH/pkg/mod/cache/download/rsc.io/breaker/@v/v2.0.0+incompatible.mod
+
+# Delete downloaded .zip files.
+go clean -modcache
+
+# Check for updates.
+go list -m -u rsc.io/breaker
+stdout '^rsc.io/breaker v1.0.0 \[v2.0.0\+incompatible\]$'
+
+# We should not have downloaded zips.
+! exists $GOPATH/pkg/mod/cache/download/rsc.io/breaker/@v/v1.0.0.zip
+! exists $GOPATH/pkg/mod/cache/download/rsc.io/breaker/@v/v2.0.0+incompatible.zip
+
+-- go.mod --
+module m
+
+go 1.16
+
+require rsc.io/breaker v1.0.0
+-- go.sum --
+rsc.io/breaker v1.0.0/go.mod h1:s5yxDXvD88U1/ESC23I2FK3Lkv4YIKaB1ij/Hbm805g=
diff --git a/src/cmd/go/testdata/script/mod_vendor_issue46867.txt b/src/cmd/go/testdata/script/mod_vendor_issue46867.txt
new file mode 100644
index 0000000000..38ae87b44a
--- /dev/null
+++ b/src/cmd/go/testdata/script/mod_vendor_issue46867.txt
@@ -0,0 +1,31 @@
+# Regression test for golang.org/issue/46867:
+# 'go mod vendor' on Windows attempted to open and copy
+# files from directories outside of the module.
+
+cd subdir
+go mod vendor
+! exists vendor/example.net/NOTICE
+exists vendor/example.net/m/NOTICE
+
+-- subdir/go.mod --
+module golang.org/issue46867
+
+go 1.17
+
+replace example.net/m v0.1.0 => ./m
+
+require example.net/m v0.1.0
+-- subdir/issue.go --
+package issue
+
+import _ "example.net/m/n"
+-- subdir/m/go.mod --
+module example.net/m
+
+go 1.17
+-- subdir/m/n/n.go --
+package n
+-- subdir/m/NOTICE --
+This notice is in module m and SHOULD be vendored.
+-- subdir/NOTICE --
+This notice is outside of module m and SHOULD NOT be vendored.
diff --git a/src/cmd/go/testdata/script/test_race_install_cgo.txt b/src/cmd/go/testdata/script/test_race_install_cgo.txt
index 3f4eb90e3f..e1fe4f2ace 100644
--- a/src/cmd/go/testdata/script/test_race_install_cgo.txt
+++ b/src/cmd/go/testdata/script/test_race_install_cgo.txt
@@ -2,8 +2,6 @@
 
 [!race] skip
 
-[!darwin] ! stale cmd/cgo  # The darwin builders are spuriously stale; see #33598.
-
 env GOBIN=$WORK/bin
 go install m/mtime m/sametime
 
diff --git a/src/cmd/go/testdata/script/test_script_cmdcd.txt b/src/cmd/go/testdata/script/test_script_cmdcd.txt
new file mode 100644
index 0000000000..6e6f67e13d
--- /dev/null
+++ b/src/cmd/go/testdata/script/test_script_cmdcd.txt
@@ -0,0 +1,13 @@
+# Tests that after a cd command, where usually the UNIX path separator is used,
+# a match against $PWD does not fail on Windows.
+
+cd $WORK/a/b/c/pkg
+
+go list -find -f {{.Root}}
+stdout $PWD
+
+-- $WORK/a/b/c/pkg/go.mod --
+module pkg
+
+-- $WORK/a/b/c/pkg/pkg.go --
+package pkg
diff --git a/src/cmd/go/testdata/script/toolexec.txt b/src/cmd/go/testdata/script/toolexec.txt
index 4f26da6d26..bb86467942 100644
--- a/src/cmd/go/testdata/script/toolexec.txt
+++ b/src/cmd/go/testdata/script/toolexec.txt
@@ -3,6 +3,12 @@
 # Build our simple toolexec program.
 go build ./cmd/mytool
 
+# Use an ephemeral build cache so that our toolexec output is not cached
+# for any stale standard-library dependencies.
+#
+# TODO(#27628): This should not be necessary.
+env GOCACHE=$WORK/gocache
+
 # Build the main package with our toolexec program. For each action, it will
 # print the tool's name and the TOOLEXEC_IMPORTPATH value. We expect to compile
 # each package once, and link the main package once.
diff --git a/src/cmd/gofmt/doc.go b/src/cmd/gofmt/doc.go
index 68476e7d44..e340665594 100644
--- a/src/cmd/gofmt/doc.go
+++ b/src/cmd/gofmt/doc.go
@@ -26,9 +26,6 @@ The flags are:
 		Do not print reformatted sources to standard output.
 		If a file's formatting is different from gofmt's, print its name
 		to standard output.
-	-G
-		Allow generic code, using type parameters.
-		See golang.org/issues/43651 for more information.
 	-r rule
 		Apply the rewrite rule to the source before reformatting.
 	-s
diff --git a/src/cmd/internal/moddeps/moddeps_test.go b/src/cmd/internal/moddeps/moddeps_test.go
index ba574f4004..56c3b2585c 100644
--- a/src/cmd/internal/moddeps/moddeps_test.go
+++ b/src/cmd/internal/moddeps/moddeps_test.go
@@ -5,6 +5,7 @@
 package moddeps_test
 
 import (
+	"bytes"
 	"encoding/json"
 	"fmt"
 	"internal/testenv"
@@ -68,7 +69,7 @@ func TestAllDependencies(t *testing.T) {
 
 			// There is no vendor directory, so the module must have no dependencies.
 			// Check that the list of active modules contains only the main module.
-			cmd := exec.Command(goBin, "list", "-mod=mod", "-m", "all")
+			cmd := exec.Command(goBin, "list", "-mod=readonly", "-m", "all")
 			cmd.Env = append(os.Environ(), "GO111MODULE=on")
 			cmd.Dir = m.Dir
 			cmd.Stderr = new(strings.Builder)
@@ -123,10 +124,38 @@ func TestAllDependencies(t *testing.T) {
 		t.Skip("skipping because a diff command with support for --recursive and --unified flags is unavailable")
 	}
 
+	// We're going to check the standard modules for tidiness, so we need a usable
+	// GOMODCACHE. If the default directory doesn't exist, use a temporary
+	// directory instead. (That can occur, for example, when running under
+	// run.bash with GO_TEST_SHORT=0: run.bash sets GOPATH=/nonexist-gopath, and
+	// GO_TEST_SHORT=0 causes it to run this portion of the test.)
+	var modcacheEnv []string
+	{
+		out, err := exec.Command(goBin, "env", "GOMODCACHE").Output()
+		if err != nil {
+			t.Fatalf("%s env GOMODCACHE: %v", goBin, err)
+		}
+		modcacheOk := false
+		if gomodcache := string(bytes.TrimSpace(out)); gomodcache != "" {
+			if _, err := os.Stat(gomodcache); err == nil {
+				modcacheOk = true
+			}
+		}
+		if !modcacheOk {
+			modcacheEnv = []string{
+				"GOMODCACHE=" + t.TempDir(),
+				"GOFLAGS=" + os.Getenv("GOFLAGS") + " -modcacherw", // Allow t.TempDir() to clean up subdirectories.
+			}
+		}
+	}
+
 	// Build the bundle binary at the golang.org/x/tools
 	// module version specified in GOROOT/src/cmd/go.mod.
 	bundleDir := t.TempDir()
-	r := runner{Dir: filepath.Join(runtime.GOROOT(), "src/cmd")}
+	r := runner{
+		Dir: filepath.Join(runtime.GOROOT(), "src/cmd"),
+		Env: append(os.Environ(), modcacheEnv...),
+	}
 	r.run(t, goBin, "build", "-mod=readonly", "-o", bundleDir, "golang.org/x/tools/cmd/bundle")
 
 	var gorootCopyDir string
@@ -160,7 +189,7 @@ func TestAllDependencies(t *testing.T) {
 			}
 			r := runner{
 				Dir: filepath.Join(gorootCopyDir, rel),
-				Env: append(os.Environ(),
+				Env: append(append(os.Environ(), modcacheEnv...),
 					// Set GOROOT.
 					"GOROOT="+gorootCopyDir,
 					// Explicitly override PWD and clear GOROOT_FINAL so that GOROOT=gorootCopyDir is definitely used.
@@ -227,7 +256,7 @@ func makeGOROOTCopy(t *testing.T) string {
 		if err != nil {
 			return err
 		}
-		if src == filepath.Join(runtime.GOROOT(), ".git") {
+		if info.IsDir() && src == filepath.Join(runtime.GOROOT(), ".git") {
 			return filepath.SkipDir
 		}
 
@@ -237,9 +266,8 @@ func makeGOROOTCopy(t *testing.T) string {
 		}
 		dst := filepath.Join(gorootCopyDir, rel)
 
-		switch src {
-		case filepath.Join(runtime.GOROOT(), "bin"),
-			filepath.Join(runtime.GOROOT(), "pkg"):
+		if info.IsDir() && (src == filepath.Join(runtime.GOROOT(), "bin") ||
+			src == filepath.Join(runtime.GOROOT(), "pkg")) {
 			// If the OS supports symlinks, use them instead
 			// of copying the bin and pkg directories.
 			if err := os.Symlink(src, dst); err == nil {
@@ -414,7 +442,7 @@ func findGorootModules(t *testing.T) []gorootModule {
 			if info.IsDir() && (info.Name() == "vendor" || info.Name() == "testdata") {
 				return filepath.SkipDir
 			}
-			if path == filepath.Join(runtime.GOROOT(), "pkg") {
+			if info.IsDir() && path == filepath.Join(runtime.GOROOT(), "pkg") {
 				// GOROOT/pkg contains generated artifacts, not source code.
 				//
 				// In https://golang.org/issue/37929 it was observed to somehow contain
@@ -422,7 +450,7 @@ func findGorootModules(t *testing.T) []gorootModule {
 				// running time of this test anyway.)
 				return filepath.SkipDir
 			}
-			if strings.HasPrefix(info.Name(), "_") || strings.HasPrefix(info.Name(), ".") {
+			if info.IsDir() && (strings.HasPrefix(info.Name(), "_") || strings.HasPrefix(info.Name(), ".")) {
 				// _ and . prefixed directories can be used for internal modules
 				// without a vendor directory that don't contribute to the build
 				// but might be used for example as code generators.
@@ -457,8 +485,31 @@ func findGorootModules(t *testing.T) []gorootModule {
 			goroot.modules = append(goroot.modules, m)
 			return nil
 		})
-	})
+		if goroot.err != nil {
+			return
+		}
 
+		// knownGOROOTModules is a hard-coded list of modules that are known to exist in GOROOT.
+		// If findGorootModules doesn't find a module, it won't be covered by tests at all,
+		// so make sure at least these modules are found. See issue 46254. If this list
+		// becomes a nuisance to update, can be replaced with len(goroot.modules) check.
+		knownGOROOTModules := [...]string{
+			"std",
+			"cmd",
+			"misc",
+			"test/bench/go1",
+		}
+		var seen = make(map[string]bool) // Key is module path.
+		for _, m := range goroot.modules {
+			seen[m.Path] = true
+		}
+		for _, m := range knownGOROOTModules {
+			if !seen[m] {
+				goroot.err = fmt.Errorf("findGorootModules didn't find the well-known module %q", m)
+				break
+			}
+		}
+	})
 	if goroot.err != nil {
 		t.Fatal(goroot.err)
 	}
diff --git a/src/cmd/internal/obj/arm64/asm7.go b/src/cmd/internal/obj/arm64/asm7.go
index 575436d764..d99afa3d27 100644
--- a/src/cmd/internal/obj/arm64/asm7.go
+++ b/src/cmd/internal/obj/arm64/asm7.go
@@ -3536,27 +3536,25 @@ func (c *ctxt7) asmout(p *obj.Prog, o *Optab, out []uint32) {
 		o1 = c.oprrr(p, p.As)
 
 		cond := int(p.From.Reg)
-		if cond < COND_EQ || cond > COND_NV {
+		// AL and NV are not allowed for CINC/CINV/CNEG/CSET/CSETM instructions
+		if cond < COND_EQ || cond > COND_NV || (cond == COND_AL || cond == COND_NV) && p.From3Type() == obj.TYPE_NONE {
 			c.ctxt.Diag("invalid condition: %v", p)
 		} else {
 			cond -= COND_EQ
 		}
 
 		r := int(p.Reg)
-		var rf int
-		if r != 0 {
-			if p.From3Type() == obj.TYPE_NONE {
-				/* CINC/CINV/CNEG */
-				rf = r
-				cond ^= 1
-			} else {
-				rf = int(p.GetFrom3().Reg) /* CSEL */
+		var rf int = r
+		if p.From3Type() == obj.TYPE_NONE {
+			/* CINC/CINV/CNEG or CSET/CSETM*/
+			if r == 0 {
+				/* CSET/CSETM */
+				rf = REGZERO
+				r = rf
 			}
-		} else {
-			/* CSET */
-			rf = REGZERO
-			r = rf
 			cond ^= 1
+		} else {
+			rf = int(p.GetFrom3().Reg) /* CSEL */
 		}
 
 		rt := int(p.To.Reg)
@@ -4335,8 +4333,10 @@ func (c *ctxt7) asmout(p *obj.Prog, o *Optab, out []uint32) {
 		if p.To.Reg == REG_RSP && isADDSop(p.As) {
 			c.ctxt.Diag("illegal destination register: %v\n", p)
 		}
+		lsl0 := LSL0_64
 		if isADDWop(p.As) || isANDWop(p.As) {
 			o1 = c.omovconst(AMOVW, p, &p.From, REGTMP)
+			lsl0 = LSL0_32
 		} else {
 			o1 = c.omovconst(AMOVD, p, &p.From, REGTMP)
 		}
@@ -4352,7 +4352,7 @@ func (c *ctxt7) asmout(p *obj.Prog, o *Optab, out []uint32) {
 		if p.To.Reg == REGSP || r == REGSP {
 			o2 = c.opxrrr(p, p.As, false)
 			o2 |= REGTMP & 31 << 16
-			o2 |= LSL0_64
+			o2 |= uint32(lsl0)
 		} else {
 			o2 = c.oprrr(p, p.As)
 			o2 |= REGTMP & 31 << 16 /* shift is 0 */
diff --git a/src/cmd/internal/obj/ppc64/asm9.go b/src/cmd/internal/obj/ppc64/asm9.go
index 69f967acfd..316959f62d 100644
--- a/src/cmd/internal/obj/ppc64/asm9.go
+++ b/src/cmd/internal/obj/ppc64/asm9.go
@@ -2220,7 +2220,7 @@ func (c *ctxt9) opform(insn uint32) int {
 
 // Encode instructions and create relocation for accessing s+d according to the
 // instruction op with source or destination (as appropriate) register reg.
-func (c *ctxt9) symbolAccess(s *obj.LSym, d int64, reg int16, op uint32) (o1, o2 uint32) {
+func (c *ctxt9) symbolAccess(s *obj.LSym, d int64, reg int16, op uint32, reuse bool) (o1, o2 uint32) {
 	if c.ctxt.Headtype == objabi.Haix {
 		// Every symbol access must be made via a TOC anchor.
 		c.ctxt.Diag("symbolAccess called for %s", s.Name)
@@ -2232,8 +2232,15 @@ func (c *ctxt9) symbolAccess(s *obj.LSym, d int64, reg int16, op uint32) (o1, o2
 	} else {
 		base = REG_R0
 	}
-	o1 = AOP_IRR(OP_ADDIS, REGTMP, base, 0)
-	o2 = AOP_IRR(op, uint32(reg), REGTMP, 0)
+	// If reg can be reused when computing the symbol address,
+	// use it instead of REGTMP.
+	if !reuse {
+		o1 = AOP_IRR(OP_ADDIS, REGTMP, base, 0)
+		o2 = AOP_IRR(op, uint32(reg), REGTMP, 0)
+	} else {
+		o1 = AOP_IRR(OP_ADDIS, uint32(reg), base, 0)
+		o2 = AOP_IRR(op, uint32(reg), uint32(reg), 0)
+	}
 	rel := obj.Addrel(c.cursym)
 	rel.Off = int32(c.pc)
 	rel.Siz = 8
@@ -2877,14 +2884,14 @@ func (c *ctxt9) asmout(p *obj.Prog, o *Optab, out []uint32) {
 		switch p.From.Name {
 		case obj.NAME_EXTERN, obj.NAME_STATIC:
 			// Load a 32 bit constant, or relocation depending on if a symbol is attached
-			o1, o2 = c.symbolAccess(p.From.Sym, v, p.To.Reg, OP_ADDI)
+			o1, o2 = c.symbolAccess(p.From.Sym, v, p.To.Reg, OP_ADDI, true)
 		default:
 			if r == 0 {
 				r = c.getimpliedreg(&p.From, p)
 			}
 			// Add a 32 bit offset to a register.
-			o1 = AOP_IRR(OP_ADDIS, REGTMP, uint32(r), uint32(high16adjusted(int32(v))))
-			o2 = AOP_IRR(OP_ADDI, uint32(p.To.Reg), REGTMP, uint32(v))
+			o1 = AOP_IRR(OP_ADDIS, uint32(p.To.Reg), uint32(r), uint32(high16adjusted(int32(v))))
+			o2 = AOP_IRR(OP_ADDI, uint32(p.To.Reg), uint32(p.To.Reg), uint32(v))
 		}
 
 	case 27: /* subc ra,$simm,rd => subfic rd,ra,$simm */
@@ -3043,10 +3050,10 @@ func (c *ctxt9) asmout(p *obj.Prog, o *Optab, out []uint32) {
 		if r == 0 {
 			r = c.getimpliedreg(&p.From, p)
 		}
-		o1 = AOP_IRR(OP_ADDIS, REGTMP, uint32(r), uint32(high16adjusted(v)))
-		o2 = AOP_IRR(c.opload(p.As), uint32(p.To.Reg), REGTMP, uint32(v))
+		o1 = AOP_IRR(OP_ADDIS, uint32(p.To.Reg), uint32(r), uint32(high16adjusted(v)))
+		o2 = AOP_IRR(c.opload(p.As), uint32(p.To.Reg), uint32(p.To.Reg), uint32(v))
 
-		// Sign extend MOVB operations. This is ignored for other cases (o.size == 8).
+		// Sign extend MOVB if needed
 		o3 = LOP_RRR(OP_EXTSB, uint32(p.To.Reg), uint32(p.To.Reg), 0)
 
 	case 40: /* word */
@@ -3404,7 +3411,8 @@ func (c *ctxt9) asmout(p *obj.Prog, o *Optab, out []uint32) {
 		if c.opform(inst) == DS_FORM && v&0x3 != 0 {
 			log.Fatalf("invalid offset for DS form load/store %v", p)
 		}
-		o1, o2 = c.symbolAccess(p.To.Sym, v, p.From.Reg, inst)
+		// Can't reuse base for store instructions.
+		o1, o2 = c.symbolAccess(p.To.Sym, v, p.From.Reg, inst, false)
 
 	case 75: // 32 bit offset symbol loads (got/toc/addr)
 		v := p.From.Offset
@@ -3432,10 +3440,11 @@ func (c *ctxt9) asmout(p *obj.Prog, o *Optab, out []uint32) {
 				rel.Type = objabi.R_ADDRPOWER_TOCREL_DS
 			}
 		default:
-			o1, o2 = c.symbolAccess(p.From.Sym, v, p.To.Reg, inst)
+			reuseBaseReg := p.As != AFMOVD && p.As != AFMOVS
+			// Reuse To.Reg as base register if not FP move.
+			o1, o2 = c.symbolAccess(p.From.Sym, v, p.To.Reg, inst, reuseBaseReg)
 		}
 
-		// Sign extend MOVB operations. This is ignored for other cases (o.size == 8).
 		o3 = LOP_RRR(OP_EXTSB, uint32(p.To.Reg), uint32(p.To.Reg), 0)
 
 	case 79:
diff --git a/src/cmd/internal/objabi/reloctype.go b/src/cmd/internal/objabi/reloctype.go
index ea55fa3b0a..52827a6dee 100644
--- a/src/cmd/internal/objabi/reloctype.go
+++ b/src/cmd/internal/objabi/reloctype.go
@@ -101,6 +101,9 @@ const (
 	// *rtype, and may be set to zero by the linker if it determines the method
 	// text is unreachable by the linked program.
 	R_METHODOFF
+	// R_KEEP tells the linker to keep the referred-to symbol in the final binary
+	// if the symbol containing the R_KEEP relocation is in the final binary.
+	R_KEEP
 	R_POWER_TOC
 	R_GOTPCREL
 	// R_JMPMIPS (only used on mips64) resolves to non-PC-relative target address
diff --git a/src/cmd/internal/objabi/reloctype_string.go b/src/cmd/internal/objabi/reloctype_string.go
index 8882d19f88..4638ef14d9 100644
--- a/src/cmd/internal/objabi/reloctype_string.go
+++ b/src/cmd/internal/objabi/reloctype_string.go
@@ -34,44 +34,45 @@ func _() {
 	_ = x[R_USEIFACE-24]
 	_ = x[R_USEIFACEMETHOD-25]
 	_ = x[R_METHODOFF-26]
-	_ = x[R_POWER_TOC-27]
-	_ = x[R_GOTPCREL-28]
-	_ = x[R_JMPMIPS-29]
-	_ = x[R_DWARFSECREF-30]
-	_ = x[R_DWARFFILEREF-31]
-	_ = x[R_ARM64_TLS_LE-32]
-	_ = x[R_ARM64_TLS_IE-33]
-	_ = x[R_ARM64_GOTPCREL-34]
-	_ = x[R_ARM64_GOT-35]
-	_ = x[R_ARM64_PCREL-36]
-	_ = x[R_ARM64_LDST8-37]
-	_ = x[R_ARM64_LDST16-38]
-	_ = x[R_ARM64_LDST32-39]
-	_ = x[R_ARM64_LDST64-40]
-	_ = x[R_ARM64_LDST128-41]
-	_ = x[R_POWER_TLS_LE-42]
-	_ = x[R_POWER_TLS_IE-43]
-	_ = x[R_POWER_TLS-44]
-	_ = x[R_ADDRPOWER_DS-45]
-	_ = x[R_ADDRPOWER_GOT-46]
-	_ = x[R_ADDRPOWER_PCREL-47]
-	_ = x[R_ADDRPOWER_TOCREL-48]
-	_ = x[R_ADDRPOWER_TOCREL_DS-49]
-	_ = x[R_RISCV_PCREL_ITYPE-50]
-	_ = x[R_RISCV_PCREL_STYPE-51]
-	_ = x[R_RISCV_TLS_IE_ITYPE-52]
-	_ = x[R_RISCV_TLS_IE_STYPE-53]
-	_ = x[R_PCRELDBL-54]
-	_ = x[R_ADDRMIPSU-55]
-	_ = x[R_ADDRMIPSTLS-56]
-	_ = x[R_ADDRCUOFF-57]
-	_ = x[R_WASMIMPORT-58]
-	_ = x[R_XCOFFREF-59]
+	_ = x[R_KEEP-27]
+	_ = x[R_POWER_TOC-28]
+	_ = x[R_GOTPCREL-29]
+	_ = x[R_JMPMIPS-30]
+	_ = x[R_DWARFSECREF-31]
+	_ = x[R_DWARFFILEREF-32]
+	_ = x[R_ARM64_TLS_LE-33]
+	_ = x[R_ARM64_TLS_IE-34]
+	_ = x[R_ARM64_GOTPCREL-35]
+	_ = x[R_ARM64_GOT-36]
+	_ = x[R_ARM64_PCREL-37]
+	_ = x[R_ARM64_LDST8-38]
+	_ = x[R_ARM64_LDST16-39]
+	_ = x[R_ARM64_LDST32-40]
+	_ = x[R_ARM64_LDST64-41]
+	_ = x[R_ARM64_LDST128-42]
+	_ = x[R_POWER_TLS_LE-43]
+	_ = x[R_POWER_TLS_IE-44]
+	_ = x[R_POWER_TLS-45]
+	_ = x[R_ADDRPOWER_DS-46]
+	_ = x[R_ADDRPOWER_GOT-47]
+	_ = x[R_ADDRPOWER_PCREL-48]
+	_ = x[R_ADDRPOWER_TOCREL-49]
+	_ = x[R_ADDRPOWER_TOCREL_DS-50]
+	_ = x[R_RISCV_PCREL_ITYPE-51]
+	_ = x[R_RISCV_PCREL_STYPE-52]
+	_ = x[R_RISCV_TLS_IE_ITYPE-53]
+	_ = x[R_RISCV_TLS_IE_STYPE-54]
+	_ = x[R_PCRELDBL-55]
+	_ = x[R_ADDRMIPSU-56]
+	_ = x[R_ADDRMIPSTLS-57]
+	_ = x[R_ADDRCUOFF-58]
+	_ = x[R_WASMIMPORT-59]
+	_ = x[R_XCOFFREF-60]
 }
 
-const _RelocType_name = "R_ADDRR_ADDRPOWERR_ADDRARM64R_ADDRMIPSR_ADDROFFR_SIZER_CALLR_CALLARMR_CALLARM64R_CALLINDR_CALLPOWERR_CALLMIPSR_CALLRISCVR_CONSTR_PCRELR_TLS_LER_TLS_IER_GOTOFFR_PLT0R_PLT1R_PLT2R_USEFIELDR_USETYPER_USEIFACER_USEIFACEMETHODR_METHODOFFR_POWER_TOCR_GOTPCRELR_JMPMIPSR_DWARFSECREFR_DWARFFILEREFR_ARM64_TLS_LER_ARM64_TLS_IER_ARM64_GOTPCRELR_ARM64_GOTR_ARM64_PCRELR_ARM64_LDST8R_ARM64_LDST16R_ARM64_LDST32R_ARM64_LDST64R_ARM64_LDST128R_POWER_TLS_LER_POWER_TLS_IER_POWER_TLSR_ADDRPOWER_DSR_ADDRPOWER_GOTR_ADDRPOWER_PCRELR_ADDRPOWER_TOCRELR_ADDRPOWER_TOCREL_DSR_RISCV_PCREL_ITYPER_RISCV_PCREL_STYPER_RISCV_TLS_IE_ITYPER_RISCV_TLS_IE_STYPER_PCRELDBLR_ADDRMIPSUR_ADDRMIPSTLSR_ADDRCUOFFR_WASMIMPORTR_XCOFFREF"
+const _RelocType_name = "R_ADDRR_ADDRPOWERR_ADDRARM64R_ADDRMIPSR_ADDROFFR_SIZER_CALLR_CALLARMR_CALLARM64R_CALLINDR_CALLPOWERR_CALLMIPSR_CALLRISCVR_CONSTR_PCRELR_TLS_LER_TLS_IER_GOTOFFR_PLT0R_PLT1R_PLT2R_USEFIELDR_USETYPER_USEIFACER_USEIFACEMETHODR_METHODOFFR_KEEPR_POWER_TOCR_GOTPCRELR_JMPMIPSR_DWARFSECREFR_DWARFFILEREFR_ARM64_TLS_LER_ARM64_TLS_IER_ARM64_GOTPCRELR_ARM64_GOTR_ARM64_PCRELR_ARM64_LDST8R_ARM64_LDST16R_ARM64_LDST32R_ARM64_LDST64R_ARM64_LDST128R_POWER_TLS_LER_POWER_TLS_IER_POWER_TLSR_ADDRPOWER_DSR_ADDRPOWER_GOTR_ADDRPOWER_PCRELR_ADDRPOWER_TOCRELR_ADDRPOWER_TOCREL_DSR_RISCV_PCREL_ITYPER_RISCV_PCREL_STYPER_RISCV_TLS_IE_ITYPER_RISCV_TLS_IE_STYPER_PCRELDBLR_ADDRMIPSUR_ADDRMIPSTLSR_ADDRCUOFFR_WASMIMPORTR_XCOFFREF"
 
-var _RelocType_index = [...]uint16{0, 6, 17, 28, 38, 47, 53, 59, 68, 79, 88, 99, 109, 120, 127, 134, 142, 150, 158, 164, 170, 176, 186, 195, 205, 221, 232, 243, 253, 262, 275, 289, 303, 317, 333, 344, 357, 370, 384, 398, 412, 427, 441, 455, 466, 480, 495, 512, 530, 551, 570, 589, 609, 629, 639, 650, 663, 674, 686, 696}
+var _RelocType_index = [...]uint16{0, 6, 17, 28, 38, 47, 53, 59, 68, 79, 88, 99, 109, 120, 127, 134, 142, 150, 158, 164, 170, 176, 186, 195, 205, 221, 232, 238, 249, 259, 268, 281, 295, 309, 323, 339, 350, 363, 376, 390, 404, 418, 433, 447, 461, 472, 486, 501, 518, 536, 557, 576, 595, 615, 635, 645, 656, 669, 680, 692, 702}
 
 func (i RelocType) String() string {
 	i -= 1
diff --git a/src/cmd/internal/objfile/goobj.go b/src/cmd/internal/objfile/goobj.go
index f19bec5dcb..dd21d22351 100644
--- a/src/cmd/internal/objfile/goobj.go
+++ b/src/cmd/internal/objfile/goobj.go
@@ -168,7 +168,7 @@ func (f *goobjFile) symbols() ([]Sym, error) {
 			code = 'T'
 		case objabi.SRODATA:
 			code = 'R'
-		case objabi.SDATA:
+		case objabi.SNOPTRDATA, objabi.SDATA:
 			code = 'D'
 		case objabi.SBSS, objabi.SNOPTRBSS, objabi.STLSBSS:
 			code = 'B'
diff --git a/src/cmd/internal/sys/arch.go b/src/cmd/internal/sys/arch.go
index e8687363de..a3e39768b6 100644
--- a/src/cmd/internal/sys/arch.go
+++ b/src/cmd/internal/sys/arch.go
@@ -40,6 +40,12 @@ type Arch struct {
 
 	// MinLC is the minimum length of an instruction code.
 	MinLC int
+
+	// Alignment is maximum alignment required by the architecture
+	// for any (compiler-generated) load or store instruction.
+	// Loads or stores smaller than Alignment must be naturally aligned.
+	// Loads or stores larger than Alignment need only be Alignment-aligned.
+	Alignment int8
 }
 
 // InFamily reports whether a is a member of any of the specified
@@ -60,6 +66,7 @@ var Arch386 = &Arch{
 	PtrSize:   4,
 	RegSize:   4,
 	MinLC:     1,
+	Alignment: 1,
 }
 
 var ArchAMD64 = &Arch{
@@ -69,6 +76,7 @@ var ArchAMD64 = &Arch{
 	PtrSize:   8,
 	RegSize:   8,
 	MinLC:     1,
+	Alignment: 1,
 }
 
 var ArchARM = &Arch{
@@ -78,6 +86,7 @@ var ArchARM = &Arch{
 	PtrSize:   4,
 	RegSize:   4,
 	MinLC:     4,
+	Alignment: 4, // TODO: just for arm5?
 }
 
 var ArchARM64 = &Arch{
@@ -87,6 +96,7 @@ var ArchARM64 = &Arch{
 	PtrSize:   8,
 	RegSize:   8,
 	MinLC:     4,
+	Alignment: 1,
 }
 
 var ArchMIPS = &Arch{
@@ -96,6 +106,7 @@ var ArchMIPS = &Arch{
 	PtrSize:   4,
 	RegSize:   4,
 	MinLC:     4,
+	Alignment: 4,
 }
 
 var ArchMIPSLE = &Arch{
@@ -105,6 +116,7 @@ var ArchMIPSLE = &Arch{
 	PtrSize:   4,
 	RegSize:   4,
 	MinLC:     4,
+	Alignment: 4,
 }
 
 var ArchMIPS64 = &Arch{
@@ -114,6 +126,7 @@ var ArchMIPS64 = &Arch{
 	PtrSize:   8,
 	RegSize:   8,
 	MinLC:     4,
+	Alignment: 8,
 }
 
 var ArchMIPS64LE = &Arch{
@@ -123,6 +136,7 @@ var ArchMIPS64LE = &Arch{
 	PtrSize:   8,
 	RegSize:   8,
 	MinLC:     4,
+	Alignment: 8,
 }
 
 var ArchPPC64 = &Arch{
@@ -132,6 +146,7 @@ var ArchPPC64 = &Arch{
 	PtrSize:   8,
 	RegSize:   8,
 	MinLC:     4,
+	Alignment: 1,
 }
 
 var ArchPPC64LE = &Arch{
@@ -141,6 +156,7 @@ var ArchPPC64LE = &Arch{
 	PtrSize:   8,
 	RegSize:   8,
 	MinLC:     4,
+	Alignment: 1,
 }
 
 var ArchRISCV64 = &Arch{
@@ -150,6 +166,7 @@ var ArchRISCV64 = &Arch{
 	PtrSize:   8,
 	RegSize:   8,
 	MinLC:     4,
+	Alignment: 8, // riscv unaligned loads work, but are really slow (trap + simulated by OS)
 }
 
 var ArchS390X = &Arch{
@@ -159,6 +176,7 @@ var ArchS390X = &Arch{
 	PtrSize:   8,
 	RegSize:   8,
 	MinLC:     2,
+	Alignment: 1,
 }
 
 var ArchWasm = &Arch{
@@ -168,6 +186,7 @@ var ArchWasm = &Arch{
 	PtrSize:   8,
 	RegSize:   8,
 	MinLC:     1,
+	Alignment: 1,
 }
 
 var Archs = [...]*Arch{
diff --git a/src/cmd/internal/sys/supported.go b/src/cmd/internal/sys/supported.go
index fa477b837f..0d2bad9612 100644
--- a/src/cmd/internal/sys/supported.go
+++ b/src/cmd/internal/sys/supported.go
@@ -74,7 +74,7 @@ func BuildModeSupported(compiler, buildmode, goos, goarch string) bool {
 			"android/amd64", "android/arm", "android/arm64", "android/386",
 			"freebsd/amd64",
 			"darwin/amd64", "darwin/arm64",
-			"windows/amd64", "windows/386":
+			"windows/amd64", "windows/386", "windows/arm64":
 			return true
 		}
 		return false
diff --git a/src/cmd/link/cgo_test.go b/src/cmd/link/cgo_test.go
new file mode 100644
index 0000000000..26ab802454
--- /dev/null
+++ b/src/cmd/link/cgo_test.go
@@ -0,0 +1,141 @@
+// Copyright 2021 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package main
+
+import (
+	"bytes"
+	"fmt"
+	"internal/testenv"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"testing"
+)
+
+// Issues 43830, 46295
+func TestCGOLTO(t *testing.T) {
+	testenv.MustHaveCGO(t)
+	testenv.MustHaveGoBuild(t)
+
+	t.Parallel()
+
+	for _, cc := range []string{"gcc", "clang"} {
+		for test := 0; test < 2; test++ {
+			t.Run(fmt.Sprintf("%s-%d", cc, test), func(t *testing.T) {
+				testCGOLTO(t, cc, test)
+			})
+		}
+	}
+}
+
+const test1_main = `
+package main
+
+/*
+extern int myadd(int, int);
+int c_add(int a, int b) {
+	return myadd(a, b);
+}
+*/
+import "C"
+
+func main() {
+	println(C.c_add(1, 2))
+}
+`
+
+const test1_add = `
+package main
+
+import "C"
+
+/* test */
+
+//export myadd
+func myadd(a C.int, b C.int) C.int {
+	return a + b
+}
+`
+
+const test2_main = `
+package main
+
+import "fmt"
+
+/*
+#include 
+
+void hello(void) {
+  printf("hello\n");
+}
+*/
+import "C"
+
+func main() {
+	hello := C.hello
+	fmt.Printf("%v\n", hello)
+}
+`
+
+func testCGOLTO(t *testing.T, cc string, test int) {
+	t.Parallel()
+
+	if _, err := exec.LookPath(cc); err != nil {
+		t.Skipf("no %s compiler", cc)
+	}
+
+	dir := t.TempDir()
+
+	writeTempFile := func(name, contents string) {
+		if err := os.WriteFile(filepath.Join(dir, name), []byte(contents), 0644); err != nil {
+			t.Fatal(err)
+		}
+	}
+
+	writeTempFile("go.mod", "module cgolto\n")
+
+	switch test {
+	case 0:
+		writeTempFile("main.go", test1_main)
+		writeTempFile("add.go", test1_add)
+	case 1:
+		writeTempFile("main.go", test2_main)
+	default:
+		t.Fatalf("bad case %d", test)
+	}
+
+	cmd := exec.Command(testenv.GoToolPath(t), "build")
+	cmd.Dir = dir
+	cmd.Env = append(os.Environ(),
+		"CC="+cc,
+		"CGO_CFLAGS=-flto",
+	)
+
+	t.Log("go build")
+	out, err := cmd.CombinedOutput()
+	t.Logf("%s", out)
+
+	if err != nil {
+		t.Logf("go build failed: %v", err)
+
+		// Error messages we've seen indicating that LTO is not supported.
+		// These errors come from GCC or clang, not Go.
+		var noLTO = []string{
+			`unrecognized command line option "-flto"`,
+			"unable to pass LLVM bit-code files to linker",
+			"file not recognized: File format not recognized",
+			"LTO support has not been enabled",
+			"linker command failed with exit code",
+			"gcc: can't load library",
+		}
+		for _, msg := range noLTO {
+			if bytes.Contains(out, []byte(msg)) {
+				t.Skipf("C compiler %v does not support LTO", cc)
+			}
+		}
+
+		t.Error("failed")
+	}
+}
diff --git a/src/cmd/link/dwarf_test.go b/src/cmd/link/dwarf_test.go
index 0419613cbe..3ca59bd47f 100644
--- a/src/cmd/link/dwarf_test.go
+++ b/src/cmd/link/dwarf_test.go
@@ -19,6 +19,36 @@ import (
 	"testing"
 )
 
+// TestMain allows this test binary to run as a -toolexec wrapper for the 'go'
+// command. If LINK_TEST_TOOLEXEC is set, TestMain runs the binary as if it were
+// cmd/link, and otherwise runs the requested tool as a subprocess.
+//
+// This allows the test to verify the behavior of the current contents of the
+// cmd/link package even if the installed cmd/link binary is stale.
+func TestMain(m *testing.M) {
+	if os.Getenv("LINK_TEST_TOOLEXEC") == "" {
+		// Not running as a -toolexec wrapper. Just run the tests.
+		os.Exit(m.Run())
+	}
+
+	if strings.TrimSuffix(filepath.Base(os.Args[1]), ".exe") == "link" {
+		// Running as a -toolexec linker, and the tool is cmd/link.
+		// Substitute this test binary for the linker.
+		os.Args = os.Args[1:]
+		main()
+		os.Exit(0)
+	}
+
+	cmd := exec.Command(os.Args[1], os.Args[2:]...)
+	cmd.Stdin = os.Stdin
+	cmd.Stdout = os.Stdout
+	cmd.Stderr = os.Stderr
+	if err := cmd.Run(); err != nil {
+		os.Exit(1)
+	}
+	os.Exit(0)
+}
+
 func testDWARF(t *testing.T, buildmode string, expectDWARF bool, env ...string) {
 	testenv.MustHaveCGO(t)
 	testenv.MustHaveGoBuild(t)
@@ -29,17 +59,6 @@ func testDWARF(t *testing.T, buildmode string, expectDWARF bool, env ...string)
 
 	t.Parallel()
 
-	out, err := exec.Command(testenv.GoToolPath(t), "list", "-f", "{{.Stale}}", "cmd/link").CombinedOutput()
-	if err != nil {
-		t.Fatalf("go list: %v\n%s", err, out)
-	}
-	if string(out) != "false\n" {
-		if strings.HasPrefix(testenv.Builder(), "darwin-") {
-			t.Skipf("cmd/link is spuriously stale on Darwin builders - see #33598")
-		}
-		t.Fatalf("cmd/link is stale - run go install cmd/link")
-	}
-
 	for _, prog := range []string{"testprog", "testprogcgo"} {
 		prog := prog
 		expectDWARF := expectDWARF
@@ -48,11 +67,11 @@ func testDWARF(t *testing.T, buildmode string, expectDWARF bool, env ...string)
 			if extld == "" {
 				extld = "gcc"
 			}
+			var err error
 			expectDWARF, err = cmddwarf.IsDWARFEnabledOnAIXLd(extld)
 			if err != nil {
 				t.Fatal(err)
 			}
-
 		}
 
 		t.Run(prog, func(t *testing.T) {
@@ -62,15 +81,14 @@ func testDWARF(t *testing.T, buildmode string, expectDWARF bool, env ...string)
 
 			exe := filepath.Join(tmpDir, prog+".exe")
 			dir := "../../runtime/testdata/" + prog
-			cmd := exec.Command(testenv.GoToolPath(t), "build", "-o", exe)
+			cmd := exec.Command(testenv.GoToolPath(t), "build", "-toolexec", os.Args[0], "-o", exe)
 			if buildmode != "" {
 				cmd.Args = append(cmd.Args, "-buildmode", buildmode)
 			}
 			cmd.Args = append(cmd.Args, dir)
-			if env != nil {
-				cmd.Env = append(os.Environ(), env...)
-				cmd.Env = append(cmd.Env, "CGO_CFLAGS=") // ensure CGO_CFLAGS does not contain any flags. Issue #35459
-			}
+			cmd.Env = append(os.Environ(), env...)
+			cmd.Env = append(cmd.Env, "CGO_CFLAGS=") // ensure CGO_CFLAGS does not contain any flags. Issue #35459
+			cmd.Env = append(cmd.Env, "LINK_TEST_TOOLEXEC=1")
 			out, err := cmd.CombinedOutput()
 			if err != nil {
 				t.Fatalf("go build -o %v %v: %v\n%s", exe, dir, err, out)
diff --git a/src/cmd/link/internal/ld/ar.go b/src/cmd/link/internal/ld/ar.go
index 22f53a4df2..23915f9032 100644
--- a/src/cmd/link/internal/ld/ar.go
+++ b/src/cmd/link/internal/ld/ar.go
@@ -124,6 +124,10 @@ func hostArchive(ctxt *Link, name string) {
 
 			libgcc := sym.Library{Pkg: "libgcc"}
 			h := ldobj(ctxt, f, &libgcc, l, pname, name)
+			if h.ld == nil {
+				Errorf(nil, "%s unrecognized object file at offset %d", name, off)
+				continue
+			}
 			f.MustSeek(h.off, 0)
 			h.ld(ctxt, f, h.pkg, h.length, h.pn)
 		}
diff --git a/src/cmd/link/internal/ld/asmb.go b/src/cmd/link/internal/ld/asmb.go
index 3754669555..d6ecb2895b 100644
--- a/src/cmd/link/internal/ld/asmb.go
+++ b/src/cmd/link/internal/ld/asmb.go
@@ -167,7 +167,10 @@ func sizeExtRelocs(ctxt *Link, relsize uint32) {
 		}
 	}
 	filesz := ctxt.Out.Offset() + sz
-	ctxt.Out.Mmap(uint64(filesz))
+	err := ctxt.Out.Mmap(uint64(filesz))
+	if err != nil {
+		Exitf("mapping output file failed: %v", err)
+	}
 }
 
 // relocSectFn wraps the function writing relocations of a section
diff --git a/src/cmd/link/internal/ld/config.go b/src/cmd/link/internal/ld/config.go
index ae0d7520eb..20f1d0b8c1 100644
--- a/src/cmd/link/internal/ld/config.go
+++ b/src/cmd/link/internal/ld/config.go
@@ -241,6 +241,10 @@ func mustLinkExternal(ctxt *Link) (res bool, reason string) {
 		return true, "dynamically linking with a shared library"
 	}
 
+	if unknownObjFormat {
+		return true, "some input objects have an unrecognized file format"
+	}
+
 	return false, ""
 }
 
@@ -248,7 +252,7 @@ func mustLinkExternal(ctxt *Link) (res bool, reason string) {
 //
 // It is called after flags are processed and inputs are processed,
 // so the ctxt.LinkMode variable has an initial value from the -linkmode
-// flag and the iscgo externalobj variables are set.
+// flag and the iscgo, externalobj, and unknownObjFormat variables are set.
 func determineLinkMode(ctxt *Link) {
 	extNeeded, extReason := mustLinkExternal(ctxt)
 	via := ""
diff --git a/src/cmd/link/internal/ld/data.go b/src/cmd/link/internal/ld/data.go
index 6659e95cc1..70fbb9dc4e 100644
--- a/src/cmd/link/internal/ld/data.go
+++ b/src/cmd/link/internal/ld/data.go
@@ -340,6 +340,7 @@ func (st *relocSymState) relocsym(s loader.Sym, P []byte) {
 			if weak && !ldr.AttrReachable(rs) {
 				// Redirect it to runtime.unreachableMethod, which will throw if called.
 				rs = syms.unreachableMethod
+				rs = ldr.ResolveABIAlias(rs)
 			}
 			if target.IsExternal() {
 				nExtReloc++
@@ -623,6 +624,7 @@ func extreloc(ctxt *Link, ldr *loader.Loader, s loader.Sym, r loader.Reloc) (loa
 		rs := ldr.ResolveABIAlias(r.Sym())
 		if r.Weak() && !ldr.AttrReachable(rs) {
 			rs = ctxt.ArchSyms.unreachableMethod
+			rs = ldr.ResolveABIAlias(rs)
 		}
 		rs, off := FoldSubSymbolOffset(ldr, rs)
 		rr.Xadd = r.Add() + off
@@ -1548,7 +1550,7 @@ func (ctxt *Link) dodata(symGroupType []sym.SymKind) {
 
 	if ctxt.HeadType == objabi.Haix && ctxt.LinkMode == LinkExternal {
 		// These symbols must have the same alignment as their section.
-		// Otherwize, ld might change the layout of Go sections.
+		// Otherwise, ld might change the layout of Go sections.
 		ldr.SetSymAlign(ldr.Lookup("runtime.data", 0), state.dataMaxAlign[sym.SDATA])
 		ldr.SetSymAlign(ldr.Lookup("runtime.bss", 0), state.dataMaxAlign[sym.SBSS])
 	}
diff --git a/src/cmd/link/internal/ld/deadcode.go b/src/cmd/link/internal/ld/deadcode.go
index 1ed5598c99..416e5da398 100644
--- a/src/cmd/link/internal/ld/deadcode.go
+++ b/src/cmd/link/internal/ld/deadcode.go
@@ -65,26 +65,26 @@ func (d *deadcodePass) init() {
 			}
 		}
 		names = append(names, *flagEntrySymbol)
-		// runtime.unreachableMethod is a function that will throw if called.
-		// We redirect unreachable methods to it.
-		names = append(names, "runtime.unreachableMethod")
-		if !d.ctxt.linkShared && d.ctxt.BuildMode != BuildModePlugin {
-			// runtime.buildVersion and runtime.modinfo are referenced in .go.buildinfo section
-			// (see function buildinfo in data.go). They should normally be reachable from the
-			// runtime. Just make it explicit, in case.
-			names = append(names, "runtime.buildVersion", "runtime.modinfo")
-		}
-		if d.ctxt.BuildMode == BuildModePlugin {
-			names = append(names, objabi.PathToPrefix(*flagPluginPath)+"..inittask", objabi.PathToPrefix(*flagPluginPath)+".main", "go.plugin.tabs")
+	}
+	// runtime.unreachableMethod is a function that will throw if called.
+	// We redirect unreachable methods to it.
+	names = append(names, "runtime.unreachableMethod")
+	if !d.ctxt.linkShared && d.ctxt.BuildMode != BuildModePlugin {
+		// runtime.buildVersion and runtime.modinfo are referenced in .go.buildinfo section
+		// (see function buildinfo in data.go). They should normally be reachable from the
+		// runtime. Just make it explicit, in case.
+		names = append(names, "runtime.buildVersion", "runtime.modinfo")
+	}
+	if d.ctxt.BuildMode == BuildModePlugin {
+		names = append(names, objabi.PathToPrefix(*flagPluginPath)+"..inittask", objabi.PathToPrefix(*flagPluginPath)+".main", "go.plugin.tabs")
 
-			// We don't keep the go.plugin.exports symbol,
-			// but we do keep the symbols it refers to.
-			exportsIdx := d.ldr.Lookup("go.plugin.exports", 0)
-			if exportsIdx != 0 {
-				relocs := d.ldr.Relocs(exportsIdx)
-				for i := 0; i < relocs.Count(); i++ {
-					d.mark(relocs.At(i).Sym(), 0)
-				}
+		// We don't keep the go.plugin.exports symbol,
+		// but we do keep the symbols it refers to.
+		exportsIdx := d.ldr.Lookup("go.plugin.exports", 0)
+		if exportsIdx != 0 {
+			relocs := d.ldr.Relocs(exportsIdx)
+			for i := 0; i < relocs.Count(); i++ {
+				d.mark(relocs.At(i).Sym(), 0)
 			}
 		}
 	}
diff --git a/src/cmd/link/internal/ld/decodesym.go b/src/cmd/link/internal/ld/decodesym.go
index fc179fc6e4..629bdcf4ca 100644
--- a/src/cmd/link/internal/ld/decodesym.go
+++ b/src/cmd/link/internal/ld/decodesym.go
@@ -10,17 +10,18 @@ import (
 	"cmd/link/internal/loader"
 	"cmd/link/internal/sym"
 	"debug/elf"
+	"encoding/binary"
 	"log"
 )
 
 // Decoding the type.* symbols.	 This has to be in sync with
 // ../../runtime/type.go, or more specifically, with what
-// cmd/compile/internal/gc/reflect.go stuffs in these.
+// cmd/compile/internal/reflectdata/reflect.go stuffs in these.
 
 // tflag is documented in reflect/type.go.
 //
 // tflag values must be kept in sync with copies in:
-//	cmd/compile/internal/gc/reflect.go
+//	cmd/compile/internal/reflectdata/reflect.go
 //	cmd/link/internal/ld/decodesym.go
 //	reflect/type.go
 //	runtime/type.go
@@ -126,8 +127,8 @@ func decodetypeName(ldr *loader.Loader, symIdx loader.Sym, relocs *loader.Relocs
 	}
 
 	data := ldr.Data(r)
-	namelen := int(uint16(data[1])<<8 | uint16(data[2]))
-	return string(data[3 : 3+namelen])
+	nameLen, nameLenLen := binary.Uvarint(data[1:])
+	return string(data[1+nameLenLen : 1+nameLenLen+int(nameLen)])
 }
 
 func decodetypeFuncInType(ldr *loader.Loader, arch *sys.Arch, symIdx loader.Sym, relocs *loader.Relocs, i int) loader.Sym {
diff --git a/src/cmd/link/internal/ld/dwarf_test.go b/src/cmd/link/internal/ld/dwarf_test.go
index 5cc4800e2a..2f59c2fe0a 100644
--- a/src/cmd/link/internal/ld/dwarf_test.go
+++ b/src/cmd/link/internal/ld/dwarf_test.go
@@ -1660,16 +1660,16 @@ func TestOutputParamAbbrevAndAttr(t *testing.T) {
 package main
 
 //go:noinline
-func ABC(p1, p2, p3 int, f1, f2, f3 float32, b1 [1024]int) (r1 int, r2 int, r3 [1024]int, r4 byte) {
-	b1[0] = 6
-	r1, r2, r3, r4 = p3, p2, b1, 'a'
+func ABC(c1, c2, c3 int, d1, d2, d3, d4 string, f1, f2, f3 float32, g1 [1024]int) (r1 int, r2 int, r3 [1024]int, r4 byte, r5 string, r6 float32) {
+	g1[0] = 6
+	r1, r2, r3, r4, r5, r6 = c3, c2+c1, g1, 'a', d1+d2+d3+d4, f1+f2+f3
 	return
 }
 
 func main() {
 	a := [1024]int{}
-	v1, v2, v3, v4 := ABC(1, 2, 3, 1.0, 2.0, 1.0, a)
-	println(v1, v2, v3[0], v4)
+	v1, v2, v3, v4, v5, v6 := ABC(1, 2, 3, "a", "b", "c", "d", 1.0, 2.0, 1.0, a)
+	println(v1, v2, v3[0], v4, v5, v6)
 }
 `
 	dir := t.TempDir()
@@ -1708,18 +1708,20 @@ func main() {
 	// OK to have it missing for input parameters, but for the moment
 	// we verify that the attr is present but set to false.
 
-	// Values in this map:
+	// Values in this map are of the form :
+	// where order is the order within the child DIE list of the param,
+	// and  is an integer:
 	//
-	//   0: 
 	//  -1: varparm attr not found
 	//   1: varparm found with value false
 	//   2: varparm found with value true
 	//
-	foundParams := make(map[string]int)
+	foundParams := make(map[string]string)
 
 	// Walk ABCs's children looking for params.
 	abcIdx := ex.idxFromOffset(abcdie.Offset)
 	childDies := ex.Children(abcIdx)
+	idx := 0
 	for _, child := range childDies {
 		if child.Tag == dwarf.TagFormalParameter {
 			st := -1
@@ -1731,7 +1733,8 @@ func main() {
 				}
 			}
 			if name, ok := child.Val(dwarf.AttrName).(string); ok {
-				foundParams[name] = st
+				foundParams[name] = fmt.Sprintf("%d:%d", idx, st)
+				idx++
 			}
 		}
 	}
@@ -1739,13 +1742,14 @@ func main() {
 	// Digest the result.
 	found := make([]string, 0, len(foundParams))
 	for k, v := range foundParams {
-		found = append(found, fmt.Sprintf("%s:%d", k, v))
+		found = append(found, fmt.Sprintf("%s:%s", k, v))
 	}
 	sort.Strings(found)
 
-	// Make sure we see all of the expected params, that they have
-	// the varparam attr, and the varparm is set for the returns.
-	expected := "[b1:1 f1:1 f2:1 f3:1 p1:1 p2:1 p3:1 r1:2 r2:2 r3:2 r4:2]"
+	// Make sure we see all of the expected params in the proper
+	// order, that they have the varparam attr, and the varparm is set
+	// for the returns.
+	expected := "[c1:0:1 c2:1:1 c3:2:1 d1:3:1 d2:4:1 d3:5:1 d4:6:1 f1:7:1 f2:8:1 f3:9:1 g1:10:1 r1:11:2 r2:12:2 r3:13:2 r4:14:2 r5:15:2 r6:16:2]"
 	if fmt.Sprintf("%+v", found) != expected {
 		t.Errorf("param check failed, wanted %s got %s\n",
 			expected, found)
diff --git a/src/cmd/link/internal/ld/elf.go b/src/cmd/link/internal/ld/elf.go
index 87d88dd957..81011638bc 100644
--- a/src/cmd/link/internal/ld/elf.go
+++ b/src/cmd/link/internal/ld/elf.go
@@ -950,6 +950,11 @@ func elfdynhash(ctxt *Link) {
 	}
 
 	s = ldr.CreateSymForUpdate(".dynamic", 0)
+	if ctxt.BuildMode == BuildModePIE {
+		// https://github.com/bminor/glibc/blob/895ef79e04a953cac1493863bcae29ad85657ee1/elf/elf.h#L986
+		const DTFLAGS_1_PIE = 0x08000000
+		Elfwritedynent(ctxt.Arch, s, elf.DT_FLAGS_1, uint64(DTFLAGS_1_PIE))
+	}
 	elfverneed = nfile
 	if elfverneed != 0 {
 		elfWriteDynEntSym(ctxt, s, elf.DT_VERNEED, gnuVersionR.Sym())
@@ -1171,7 +1176,7 @@ func elfrelocsect(ctxt *Link, out *OutBuf, sect *sym.Section, syms []loader.Sym)
 		}
 	}
 
-	eaddr := int32(sect.Vaddr + sect.Length)
+	eaddr := sect.Vaddr + sect.Length
 	for _, s := range syms {
 		if !ldr.AttrReachable(s) {
 			continue
diff --git a/src/cmd/link/internal/ld/ld_test.go b/src/cmd/link/internal/ld/ld_test.go
index ca764632c3..3702a4d08f 100644
--- a/src/cmd/link/internal/ld/ld_test.go
+++ b/src/cmd/link/internal/ld/ld_test.go
@@ -174,6 +174,8 @@ func TestWindowsBuildmodeCSharedASLR(t *testing.T) {
 		t.Skip("skipping windows amd64/386 only test")
 	}
 
+	testenv.MustHaveCGO(t)
+
 	t.Run("aslr", func(t *testing.T) {
 		testWindowsBuildmodeCSharedASLR(t, true)
 	})
diff --git a/src/cmd/link/internal/ld/lib.go b/src/cmd/link/internal/ld/lib.go
index eb85c88fbf..d7e408669e 100644
--- a/src/cmd/link/internal/ld/lib.go
+++ b/src/cmd/link/internal/ld/lib.go
@@ -343,10 +343,16 @@ var (
 const pkgdef = "__.PKGDEF"
 
 var (
-	// Set if we see an object compiled by the host compiler that is not
-	// from a package that is known to support internal linking mode.
+	// externalobj is set to true if we see an object compiled by
+	// the host compiler that is not from a package that is known
+	// to support internal linking mode.
 	externalobj = false
-	theline     string
+
+	// unknownObjFormat is set to true if we see an object whose
+	// format we don't recognize.
+	unknownObjFormat = false
+
+	theline string
 )
 
 func Lflag(ctxt *Link, arg string) {
@@ -1066,6 +1072,10 @@ func hostobjs(ctxt *Link) {
 		}
 
 		f.MustSeek(h.off, 0)
+		if h.ld == nil {
+			Errorf(nil, "%s: unrecognized object file format", h.pn)
+			continue
+		}
 		h.ld(ctxt, f, h.pkg, h.length, h.pn)
 		f.Close()
 	}
@@ -1856,6 +1866,14 @@ func ldobj(ctxt *Link, f *bio.Reader, lib *sym.Library, length int64, pn string,
 		return ldhostobj(ldxcoff, ctxt.HeadType, f, pkg, length, pn, file)
 	}
 
+	if c1 != 'g' || c2 != 'o' || c3 != ' ' || c4 != 'o' {
+		// An unrecognized object is just passed to the external linker.
+		// If we try to read symbols from this object, we will
+		// report an error at that time.
+		unknownObjFormat = true
+		return ldhostobj(nil, ctxt.HeadType, f, pkg, length, pn, file)
+	}
+
 	/* check the header */
 	line, err := f.ReadString('\n')
 	if err != nil {
@@ -1875,7 +1893,7 @@ func ldobj(ctxt *Link, f *bio.Reader, lib *sym.Library, length int64, pn string,
 			return nil
 		}
 
-		Errorf(nil, "%s: not an object file: @%d %02x%02x%02x%02x", pn, start, c1, c2, c3, c4)
+		Errorf(nil, "%s: not an object file: @%d %q", pn, start, line)
 		return nil
 	}
 
diff --git a/src/cmd/link/internal/ld/macho.go b/src/cmd/link/internal/ld/macho.go
index 642113cf07..45a3971c33 100644
--- a/src/cmd/link/internal/ld/macho.go
+++ b/src/cmd/link/internal/ld/macho.go
@@ -1194,7 +1194,7 @@ func machorelocsect(ctxt *Link, out *OutBuf, sect *sym.Section, syms []loader.Sy
 		}
 	}
 
-	eaddr := int32(sect.Vaddr + sect.Length)
+	eaddr := sect.Vaddr + sect.Length
 	for _, s := range syms {
 		if !ldr.AttrReachable(s) {
 			continue
diff --git a/src/cmd/link/internal/ld/main.go b/src/cmd/link/internal/ld/main.go
index adb39d0607..cba0e3d81f 100644
--- a/src/cmd/link/internal/ld/main.go
+++ b/src/cmd/link/internal/ld/main.go
@@ -334,7 +334,7 @@ func Main(arch *sys.Arch, theArch Arch) {
 		// Don't mmap if we're building for Wasm. Wasm file
 		// layout is very different so filesize is meaningless.
 		if err := ctxt.Out.Mmap(filesize); err != nil {
-			panic(err)
+			Exitf("mapping output file failed: %v", err)
 		}
 	}
 	// asmb will redirect symbols to the output file mmap, and relocations
diff --git a/src/cmd/link/internal/ld/outbuf.go b/src/cmd/link/internal/ld/outbuf.go
index 530836ef7c..9d5e8854fe 100644
--- a/src/cmd/link/internal/ld/outbuf.go
+++ b/src/cmd/link/internal/ld/outbuf.go
@@ -160,7 +160,7 @@ func (out *OutBuf) copyHeap() bool {
 	total := uint64(bufLen + heapLen)
 	if heapLen != 0 {
 		if err := out.Mmap(total); err != nil { // Mmap will copy out.heap over to out.buf
-			panic(err)
+			Exitf("mapping output file failed: %v", err)
 		}
 	}
 	return true
diff --git a/src/cmd/link/internal/ld/pe.go b/src/cmd/link/internal/ld/pe.go
index 3540c07da1..8eb4231c3a 100644
--- a/src/cmd/link/internal/ld/pe.go
+++ b/src/cmd/link/internal/ld/pe.go
@@ -475,7 +475,7 @@ func (f *peFile) addDWARFSection(name string, size int) *peSection {
 	off := f.stringTable.add(name)
 	h := f.addSection(name, size, size)
 	h.shortName = fmt.Sprintf("/%d", off)
-	h.characteristics = IMAGE_SCN_MEM_READ | IMAGE_SCN_MEM_DISCARDABLE | IMAGE_SCN_CNT_INITIALIZED_DATA
+	h.characteristics = IMAGE_SCN_ALIGN_1BYTES | IMAGE_SCN_MEM_READ | IMAGE_SCN_MEM_DISCARDABLE | IMAGE_SCN_CNT_INITIALIZED_DATA
 	return h
 }
 
diff --git a/src/cmd/link/internal/loader/loader.go b/src/cmd/link/internal/loader/loader.go
index 1b71a66c6f..9d5319c312 100644
--- a/src/cmd/link/internal/loader/loader.go
+++ b/src/cmd/link/internal/loader/loader.go
@@ -459,6 +459,15 @@ func (st *loadState) addSym(name string, ver int, r *oReader, li uint32, kind in
 		if l.flags&FlagStrictDups != 0 {
 			l.checkdup(name, r, li, oldi)
 		}
+		// Fix for issue #47185 -- given two dupok symbols with
+		// different sizes, favor symbol with larger size. See
+		// also issue #46653.
+		szdup := l.SymSize(oldi)
+		sz := int64(r.Sym(li).Siz())
+		if szdup < sz {
+			// new symbol overwrites old symbol.
+			l.objSyms[oldi] = objSym{r.objidx, li}
+		}
 		return oldi
 	}
 	oldr, oldli := l.toLocal(oldi)
@@ -699,12 +708,18 @@ func (l *Loader) checkdup(name string, r *oReader, li uint32, dup Sym) {
 	p := r.Data(li)
 	rdup, ldup := l.toLocal(dup)
 	pdup := rdup.Data(ldup)
-	if bytes.Equal(p, pdup) {
-		return
-	}
 	reason := "same length but different contents"
 	if len(p) != len(pdup) {
 		reason = fmt.Sprintf("new length %d != old length %d", len(p), len(pdup))
+	} else if bytes.Equal(p, pdup) {
+		// For BSS symbols, we need to check size as well, see issue 46653.
+		szdup := l.SymSize(dup)
+		sz := int64(r.Sym(li).Siz())
+		if szdup == sz {
+			return
+		}
+		reason = fmt.Sprintf("different sizes: new size %d != old size %d",
+			sz, szdup)
 	}
 	fmt.Fprintf(os.Stderr, "cmd/link: while reading object for '%v': duplicate symbol '%s', previous def at '%v', with mismatched payload: %s\n", r.unit.Lib, name, rdup.unit.Lib, reason)
 
diff --git a/src/cmd/link/link_test.go b/src/cmd/link/link_test.go
index 8805ff1f02..7230054bed 100644
--- a/src/cmd/link/link_test.go
+++ b/src/cmd/link/link_test.go
@@ -470,10 +470,30 @@ TEXT	·f(SB), NOSPLIT|DUPOK, $0-0
 	JMP	0(PC)
 `
 
+const testStrictDupAsmSrc3 = `
+#include "textflag.h"
+GLOBL ·rcon(SB), RODATA|DUPOK, $64
+`
+
+const testStrictDupAsmSrc4 = `
+#include "textflag.h"
+GLOBL ·rcon(SB), RODATA|DUPOK, $32
+`
+
 func TestStrictDup(t *testing.T) {
 	// Check that -strictdups flag works.
 	testenv.MustHaveGoBuild(t)
 
+	asmfiles := []struct {
+		fname   string
+		payload string
+	}{
+		{"a", testStrictDupAsmSrc1},
+		{"b", testStrictDupAsmSrc2},
+		{"c", testStrictDupAsmSrc3},
+		{"d", testStrictDupAsmSrc4},
+	}
+
 	t.Parallel()
 
 	tmpdir := t.TempDir()
@@ -483,15 +503,12 @@ func TestStrictDup(t *testing.T) {
 	if err != nil {
 		t.Fatal(err)
 	}
-	src = filepath.Join(tmpdir, "a.s")
-	err = ioutil.WriteFile(src, []byte(testStrictDupAsmSrc1), 0666)
-	if err != nil {
-		t.Fatal(err)
-	}
-	src = filepath.Join(tmpdir, "b.s")
-	err = ioutil.WriteFile(src, []byte(testStrictDupAsmSrc2), 0666)
-	if err != nil {
-		t.Fatal(err)
+	for _, af := range asmfiles {
+		src = filepath.Join(tmpdir, af.fname+".s")
+		err = ioutil.WriteFile(src, []byte(af.payload), 0666)
+		if err != nil {
+			t.Fatal(err)
+		}
 	}
 	src = filepath.Join(tmpdir, "go.mod")
 	err = ioutil.WriteFile(src, []byte("module teststrictdup\n"), 0666)
@@ -503,7 +520,7 @@ func TestStrictDup(t *testing.T) {
 	cmd.Dir = tmpdir
 	out, err := cmd.CombinedOutput()
 	if err != nil {
-		t.Errorf("linking with -strictdups=1 failed: %v", err)
+		t.Errorf("linking with -strictdups=1 failed: %v\n%s", err, string(out))
 	}
 	if !bytes.Contains(out, []byte("mismatched payload")) {
 		t.Errorf("unexpected output:\n%s", out)
@@ -515,7 +532,11 @@ func TestStrictDup(t *testing.T) {
 	if err == nil {
 		t.Errorf("linking with -strictdups=2 did not fail")
 	}
-	if !bytes.Contains(out, []byte("mismatched payload")) {
+	// NB: on amd64 we get the 'new length' error, on arm64 the 'different
+	// contents' error.
+	if !(bytes.Contains(out, []byte("mismatched payload: new length")) ||
+		bytes.Contains(out, []byte("mismatched payload: same length but different contents"))) ||
+		!bytes.Contains(out, []byte("mismatched payload: different sizes")) {
 		t.Errorf("unexpected output:\n%s", out)
 	}
 }
@@ -698,7 +719,7 @@ func TestTrampolineCgo(t *testing.T) {
 	if err != nil {
 		t.Errorf("executable failed to run: %v\n%s", err, out)
 	}
-	if string(out) != "hello\n" {
+	if string(out) != "hello\n" && string(out) != "hello\r\n" {
 		t.Errorf("unexpected output:\n%s", out)
 	}
 
@@ -717,7 +738,7 @@ func TestTrampolineCgo(t *testing.T) {
 	if err != nil {
 		t.Errorf("executable failed to run: %v\n%s", err, out)
 	}
-	if string(out) != "hello\n" {
+	if string(out) != "hello\n" && string(out) != "hello\r\n" {
 		t.Errorf("unexpected output:\n%s", out)
 	}
 }
diff --git a/src/cmd/pprof/pprof.go b/src/cmd/pprof/pprof.go
index 11f91cbedb..e72c765adc 100644
--- a/src/cmd/pprof/pprof.go
+++ b/src/cmd/pprof/pprof.go
@@ -232,9 +232,9 @@ func (f *file) Name() string {
 	return f.name
 }
 
-func (f *file) Base() uint64 {
-	// No support for shared libraries.
-	return 0
+func (f *file) ObjAddr(addr uint64) (uint64, error) {
+	// No support for shared libraries, so translation is a no-op.
+	return addr, nil
 }
 
 func (f *file) BuildID() string {
diff --git a/src/cmd/pprof/pprof_test.go b/src/cmd/pprof/pprof_test.go
new file mode 100644
index 0000000000..11e251bfde
--- /dev/null
+++ b/src/cmd/pprof/pprof_test.go
@@ -0,0 +1,127 @@
+// Copyright 2021 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package main
+
+import (
+	"fmt"
+	"internal/testenv"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"runtime"
+	"strings"
+	"testing"
+)
+
+var tmp, pprofExe string // populated by buildPprof
+
+func TestMain(m *testing.M) {
+	if !testenv.HasGoBuild() {
+		return
+	}
+
+	var exitcode int
+	if err := buildPprof(); err == nil {
+		exitcode = m.Run()
+	} else {
+		fmt.Println(err)
+		exitcode = 1
+	}
+	os.RemoveAll(tmp)
+	os.Exit(exitcode)
+}
+
+func buildPprof() error {
+	var err error
+	tmp, err = os.MkdirTemp("", "TestPprof")
+	if err != nil {
+		return fmt.Errorf("TempDir failed: %v", err)
+	}
+
+	pprofExe = filepath.Join(tmp, "testpprof.exe")
+	gotool, err := testenv.GoTool()
+	if err != nil {
+		return err
+	}
+	out, err := exec.Command(gotool, "build", "-o", pprofExe, "cmd/pprof").CombinedOutput()
+	if err != nil {
+		os.RemoveAll(tmp)
+		return fmt.Errorf("go build -o %v cmd/pprof: %v\n%s", pprofExe, err, string(out))
+	}
+
+	return nil
+}
+
+// See also runtime/pprof.cpuProfilingBroken.
+func mustHaveCPUProfiling(t *testing.T) {
+	switch runtime.GOOS {
+	case "plan9":
+		t.Skipf("skipping on %s, unimplemented", runtime.GOOS)
+	case "aix":
+		t.Skipf("skipping on %s, issue 45170", runtime.GOOS)
+	case "ios", "dragonfly", "netbsd", "illumos", "solaris":
+		t.Skipf("skipping on %s, issue 13841", runtime.GOOS)
+	case "openbsd":
+		if runtime.GOARCH == "arm" || runtime.GOARCH == "arm64" {
+			t.Skipf("skipping on %s/%s, issue 13841", runtime.GOOS, runtime.GOARCH)
+		}
+	}
+}
+
+func mustHaveDisasm(t *testing.T) {
+	switch runtime.GOARCH {
+	case "mips", "mipsle", "mips64", "mips64le":
+		t.Skipf("skipping on %s, issue 12559", runtime.GOARCH)
+	case "riscv64":
+		t.Skipf("skipping on %s, issue 36738", runtime.GOARCH)
+	case "s390x":
+		t.Skipf("skipping on %s, issue 15255", runtime.GOARCH)
+	}
+
+	// Skip PIE platforms, pprof can't disassemble PIE.
+	if runtime.GOOS == "windows" {
+		t.Skipf("skipping on %s, issue 46639", runtime.GOOS)
+	}
+	if runtime.GOOS == "darwin" && runtime.GOARCH == "arm64" {
+		t.Skipf("skipping on %s/%s, issue 46639", runtime.GOOS, runtime.GOARCH)
+	}
+}
+
+// TestDisasm verifies that cmd/pprof can successfully disassemble functions.
+//
+// This is a regression test for issue 46636.
+func TestDisasm(t *testing.T) {
+	mustHaveCPUProfiling(t)
+	mustHaveDisasm(t)
+	testenv.MustHaveGoBuild(t)
+
+	tmpdir := t.TempDir()
+	cpuExe := filepath.Join(tmpdir, "cpu.exe")
+	cmd := exec.Command(testenv.GoToolPath(t), "build", "-o", cpuExe, "cpu.go")
+	cmd.Dir = "testdata/"
+	out, err := cmd.CombinedOutput()
+	if err != nil {
+		t.Fatalf("build failed: %v\n%s", err, out)
+	}
+
+	profile := filepath.Join(tmpdir, "cpu.pprof")
+	cmd = exec.Command(cpuExe, "-output", profile)
+	out, err = cmd.CombinedOutput()
+	if err != nil {
+		t.Fatalf("cpu failed: %v\n%s", err, out)
+	}
+
+	cmd = exec.Command(pprofExe, "-disasm", "main.main", cpuExe, profile)
+	out, err = cmd.CombinedOutput()
+	if err != nil {
+		t.Fatalf("pprof failed: %v\n%s", err, out)
+	}
+
+	sout := string(out)
+	want := "ROUTINE ======================== main.main"
+	if !strings.Contains(sout, want) {
+		t.Errorf("pprof disasm got %s want contains %q", sout, want)
+	}
+}
diff --git a/src/cmd/pprof/testdata/cpu.go b/src/cmd/pprof/testdata/cpu.go
new file mode 100644
index 0000000000..5b682870db
--- /dev/null
+++ b/src/cmd/pprof/testdata/cpu.go
@@ -0,0 +1,41 @@
+// Copyright 2021 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package main
+
+import (
+	"flag"
+	"fmt"
+	"os"
+	"runtime/pprof"
+	"time"
+)
+
+var output = flag.String("output", "", "pprof profile output file")
+
+func main() {
+	flag.Parse()
+	if *output == "" {
+		fmt.Fprintf(os.Stderr, "usage: %s -output file.pprof\n", os.Args[0])
+		os.Exit(2)
+	}
+
+	f, err := os.Create(*output)
+	if err != nil {
+		fmt.Fprintln(os.Stderr, err)
+		os.Exit(2)
+	}
+	defer f.Close()
+
+	if err := pprof.StartCPUProfile(f); err != nil {
+		fmt.Fprintln(os.Stderr, err)
+		os.Exit(2)
+	}
+	defer pprof.StopCPUProfile()
+
+	// Spin for long enough to collect some samples.
+	start := time.Now()
+	for time.Since(start) < time.Second {
+	}
+}
diff --git a/src/cmd/vendor/github.com/google/pprof/driver/driver.go b/src/cmd/vendor/github.com/google/pprof/driver/driver.go
index e65bc2f417..fc05f919ba 100644
--- a/src/cmd/vendor/github.com/google/pprof/driver/driver.go
+++ b/src/cmd/vendor/github.com/google/pprof/driver/driver.go
@@ -159,8 +159,8 @@ type ObjFile interface {
 	// Name returns the underlying file name, if available.
 	Name() string
 
-	// Base returns the base address to use when looking up symbols in the file.
-	Base() uint64
+	// ObjAddr returns the objdump address corresponding to a runtime address.
+	ObjAddr(addr uint64) (uint64, error)
 
 	// BuildID returns the GNU build ID of the file, or an empty string.
 	BuildID() string
diff --git a/src/cmd/vendor/github.com/google/pprof/internal/binutils/binutils.go b/src/cmd/vendor/github.com/google/pprof/internal/binutils/binutils.go
index 576a6ee66a..5ed8a1f9f1 100644
--- a/src/cmd/vendor/github.com/google/pprof/internal/binutils/binutils.go
+++ b/src/cmd/vendor/github.com/google/pprof/internal/binutils/binutils.go
@@ -42,7 +42,12 @@ type Binutils struct {
 	rep *binrep
 }
 
-var objdumpLLVMVerRE = regexp.MustCompile(`LLVM version (?:(\d*)\.(\d*)\.(\d*)|.*(trunk).*)`)
+var (
+	objdumpLLVMVerRE = regexp.MustCompile(`LLVM version (?:(\d*)\.(\d*)\.(\d*)|.*(trunk).*)`)
+
+	// Defined for testing
+	elfOpen = elf.Open
+)
 
 // binrep is an immutable representation for Binutils.  It is atomically
 // replaced on every mutation to provide thread-safe access.
@@ -421,14 +426,23 @@ func (b *binrep) openMachO(name string, start, limit, offset uint64) (plugin.Obj
 }
 
 func (b *binrep) openELF(name string, start, limit, offset uint64) (plugin.ObjFile, error) {
-	ef, err := elf.Open(name)
+	ef, err := elfOpen(name)
 	if err != nil {
 		return nil, fmt.Errorf("error parsing %s: %v", name, err)
 	}
 	defer ef.Close()
 
-	var stextOffset *uint64
-	var pageAligned = func(addr uint64) bool { return addr%4096 == 0 }
+	buildID := ""
+	if f, err := os.Open(name); err == nil {
+		if id, err := elfexec.GetBuildID(f); err == nil {
+			buildID = fmt.Sprintf("%x", id)
+		}
+	}
+
+	var (
+		stextOffset *uint64
+		pageAligned = func(addr uint64) bool { return addr%4096 == 0 }
+	)
 	if strings.Contains(name, "vmlinux") || !pageAligned(start) || !pageAligned(limit) || !pageAligned(offset) {
 		// Reading all Symbols is expensive, and we only rarely need it so
 		// we don't want to do it every time. But if _stext happens to be
@@ -450,38 +464,29 @@ func (b *binrep) openELF(name string, start, limit, offset uint64) (plugin.ObjFi
 		}
 	}
 
-	var ph *elf.ProgHeader
-	// For user space executables, find the actual program segment that is
-	// associated with the given mapping. Skip this search if limit <= start.
-	// We cannot use just a check on the start address of the mapping to tell if
-	// it's a kernel / .ko module mapping, because with quipper address remapping
-	// enabled, the address would be in the lower half of the address space.
-	if stextOffset == nil && start < limit && limit < (uint64(1)<<63) {
-		ph, err = elfexec.FindProgHeaderForMapping(ef, offset, limit-start)
-		if err != nil {
-			return nil, fmt.Errorf("failed to find program header for file %q, mapping pgoff %x, memsz=%x: %v", name, offset, limit-start, err)
-		}
-	} else {
-		// For the kernel, find the program segment that includes the .text section.
-		ph = elfexec.FindTextProgHeader(ef)
-	}
-
-	base, err := elfexec.GetBase(&ef.FileHeader, ph, stextOffset, start, limit, offset)
-	if err != nil {
+	// Check that we can compute a base for the binary. This may not be the
+	// correct base value, so we don't save it. We delay computing the actual base
+	// value until we have a sample address for this mapping, so that we can
+	// correctly identify the associated program segment that is needed to compute
+	// the base.
+	if _, err := elfexec.GetBase(&ef.FileHeader, elfexec.FindTextProgHeader(ef), stextOffset, start, limit, offset); err != nil {
 		return nil, fmt.Errorf("could not identify base for %s: %v", name, err)
 	}
 
-	buildID := ""
-	if f, err := os.Open(name); err == nil {
-		if id, err := elfexec.GetBuildID(f); err == nil {
-			buildID = fmt.Sprintf("%x", id)
-		}
-	}
-	isData := ph != nil && ph.Flags&elf.PF_X == 0
 	if b.fast || (!b.addr2lineFound && !b.llvmSymbolizerFound) {
-		return &fileNM{file: file{b, name, base, buildID, isData}}, nil
+		return &fileNM{file: file{
+			b:       b,
+			name:    name,
+			buildID: buildID,
+			m:       &elfMapping{start: start, limit: limit, offset: offset, stextOffset: stextOffset},
+		}}, nil
 	}
-	return &fileAddr2Line{file: file{b, name, base, buildID, isData}}, nil
+	return &fileAddr2Line{file: file{
+		b:       b,
+		name:    name,
+		buildID: buildID,
+		m:       &elfMapping{start: start, limit: limit, offset: offset, stextOffset: stextOffset},
+	}}, nil
 }
 
 func (b *binrep) openPE(name string, start, limit, offset uint64) (plugin.ObjFile, error) {
@@ -511,21 +516,119 @@ func (b *binrep) openPE(name string, start, limit, offset uint64) (plugin.ObjFil
 	return &fileAddr2Line{file: file{b: b, name: name, base: base}}, nil
 }
 
+// elfMapping stores the parameters of a runtime mapping that are needed to
+// identify the ELF segment associated with a mapping.
+type elfMapping struct {
+	// Runtime mapping parameters.
+	start, limit, offset uint64
+	// Offset of _stext symbol. Only defined for kernel images, nil otherwise.
+	stextOffset *uint64
+}
+
 // file implements the binutils.ObjFile interface.
 type file struct {
 	b       *binrep
 	name    string
-	base    uint64
 	buildID string
-	isData  bool
+
+	baseOnce sync.Once // Ensures the base, baseErr and isData are computed once.
+	base     uint64
+	baseErr  error // Any eventual error while computing the base.
+	isData   bool
+	// Mapping information. Relevant only for ELF files, nil otherwise.
+	m *elfMapping
+}
+
+// computeBase computes the relocation base for the given binary file only if
+// the elfMapping field is set. It populates the base and isData fields and
+// returns an error.
+func (f *file) computeBase(addr uint64) error {
+	if f == nil || f.m == nil {
+		return nil
+	}
+	if addr < f.m.start || addr >= f.m.limit {
+		return fmt.Errorf("specified address %x is outside the mapping range [%x, %x] for file %q", addr, f.m.start, f.m.limit, f.name)
+	}
+	ef, err := elfOpen(f.name)
+	if err != nil {
+		return fmt.Errorf("error parsing %s: %v", f.name, err)
+	}
+	defer ef.Close()
+
+	var ph *elf.ProgHeader
+	// For user space executables, find the actual program segment that is
+	// associated with the given mapping. Skip this search if limit <= start.
+	// We cannot use just a check on the start address of the mapping to tell if
+	// it's a kernel / .ko module mapping, because with quipper address remapping
+	// enabled, the address would be in the lower half of the address space.
+	if f.m.stextOffset == nil && f.m.start < f.m.limit && f.m.limit < (uint64(1)<<63) {
+		// Get all program headers associated with the mapping.
+		headers, hasLoadables := elfexec.ProgramHeadersForMapping(ef, f.m.offset, f.m.limit-f.m.start)
+
+		// Some ELF files don't contain any loadable program segments, e.g. .ko
+		// kernel modules. It's not an error to have no header in such cases.
+		if hasLoadables {
+			ph, err = matchUniqueHeader(headers, addr-f.m.start+f.m.offset)
+			if err != nil {
+				return fmt.Errorf("failed to find program header for file %q, ELF mapping %#v, address %x: %v", f.name, *f.m, addr, err)
+			}
+		}
+	} else {
+		// For the kernel, find the program segment that includes the .text section.
+		ph = elfexec.FindTextProgHeader(ef)
+	}
+
+	base, err := elfexec.GetBase(&ef.FileHeader, ph, f.m.stextOffset, f.m.start, f.m.limit, f.m.offset)
+	if err != nil {
+		return err
+	}
+	f.base = base
+	f.isData = ph != nil && ph.Flags&elf.PF_X == 0
+	return nil
+}
+
+// matchUniqueHeader attempts to identify a unique header from the given list,
+// using the given file offset to disambiguate between multiple segments. It
+// returns an error if the header list is empty or if it cannot identify a
+// unique header.
+func matchUniqueHeader(headers []*elf.ProgHeader, fileOffset uint64) (*elf.ProgHeader, error) {
+	if len(headers) == 0 {
+		return nil, errors.New("no program header matches mapping info")
+	}
+	if len(headers) == 1 {
+		// Don't use the file offset if we already have a single header.
+		return headers[0], nil
+	}
+	// We have multiple input segments. Attempt to identify a unique one
+	// based on the given file offset.
+	var ph *elf.ProgHeader
+	for _, h := range headers {
+		if fileOffset >= h.Off && fileOffset < h.Off+h.Memsz {
+			if ph != nil {
+				// Assuming no other bugs, this can only happen if we have two or
+				// more small program segments that fit on the same page, and a
+				// segment other than the last one includes uninitialized data.
+				return nil, fmt.Errorf("found second program header (%#v) that matches file offset %x, first program header is %#v. Does first program segment contain uninitialized data?", *h, fileOffset, *ph)
+			}
+			ph = h
+		}
+	}
+	if ph == nil {
+		return nil, fmt.Errorf("no program header matches file offset %x", fileOffset)
+	}
+	return ph, nil
 }
 
 func (f *file) Name() string {
 	return f.name
 }
 
-func (f *file) Base() uint64 {
-	return f.base
+func (f *file) ObjAddr(addr uint64) (uint64, error) {
+	f.baseOnce.Do(func() { f.baseErr = f.computeBase(addr) })
+	if f.baseErr != nil {
+		return 0, f.baseErr
+	}
+	return addr - f.base, nil
 }
 
 func (f *file) BuildID() string {
@@ -533,7 +636,11 @@ func (f *file) BuildID() string {
 }
 
 func (f *file) SourceLine(addr uint64) ([]plugin.Frame, error) {
-	return []plugin.Frame{}, nil
+	f.baseOnce.Do(func() { f.baseErr = f.computeBase(addr) })
+	if f.baseErr != nil {
+		return nil, f.baseErr
+	}
+	return nil, nil
 }
 
 func (f *file) Close() error {
@@ -560,6 +667,10 @@ type fileNM struct {
 }
 
 func (f *fileNM) SourceLine(addr uint64) ([]plugin.Frame, error) {
+	f.baseOnce.Do(func() { f.baseErr = f.computeBase(addr) })
+	if f.baseErr != nil {
+		return nil, f.baseErr
+	}
 	if f.addr2linernm == nil {
 		addr2liner, err := newAddr2LinerNM(f.b.nm, f.name, f.base)
 		if err != nil {
@@ -579,9 +690,14 @@ type fileAddr2Line struct {
 	file
 	addr2liner     *addr2Liner
 	llvmSymbolizer *llvmSymbolizer
+	isData         bool
 }
 
 func (f *fileAddr2Line) SourceLine(addr uint64) ([]plugin.Frame, error) {
+	f.baseOnce.Do(func() { f.baseErr = f.computeBase(addr) })
+	if f.baseErr != nil {
+		return nil, f.baseErr
+	}
 	f.once.Do(f.init)
 	if f.llvmSymbolizer != nil {
 		return f.llvmSymbolizer.addrInfo(addr)
diff --git a/src/cmd/vendor/github.com/google/pprof/internal/elfexec/elfexec.go b/src/cmd/vendor/github.com/google/pprof/internal/elfexec/elfexec.go
index 3b3c6ee89f..2638b2db2d 100644
--- a/src/cmd/vendor/github.com/google/pprof/internal/elfexec/elfexec.go
+++ b/src/cmd/vendor/github.com/google/pprof/internal/elfexec/elfexec.go
@@ -284,83 +284,71 @@ func FindTextProgHeader(f *elf.File) *elf.ProgHeader {
 	return nil
 }
 
-// FindProgHeaderForMapping returns the loadable program segment header that is
-// fully contained in the runtime mapping with file offset pgoff and memory size
-// memsz, or an error if the segment cannot be determined. The function returns
-// a nil program header and no error if the ELF binary has no loadable segments.
-func FindProgHeaderForMapping(f *elf.File, pgoff, memsz uint64) (*elf.ProgHeader, error) {
+// ProgramHeadersForMapping returns the loadable program segment headers that
+// are fully contained in the runtime mapping with file offset pgoff and memory
+// size memsz, and if the binary includes any loadable segments.
+func ProgramHeadersForMapping(f *elf.File, pgoff, memsz uint64) ([]*elf.ProgHeader, bool) {
+	const (
+		// pageSize defines the virtual memory page size used by the loader. This
+		// value is dependent on the memory management unit of the CPU. The page
+		// size is 4KB virtually on all the architectures that we care about, so we
+		// define this metric as a constant. If we encounter architectures where
+		// page sie is not 4KB, we must try to guess the page size on the system
+		// where the profile was collected, possibly using the architecture
+		// specified in the ELF file header.
+		pageSize       = 4096
+		pageOffsetMask = pageSize - 1
+		pageMask       = ^uint64(pageOffsetMask)
+	)
 	var headers []*elf.ProgHeader
-	loadables := 0
+	hasLoadables := false
 	for _, p := range f.Progs {
+		// The segment must be fully included in the mapping.
 		if p.Type == elf.PT_LOAD && pgoff <= p.Off && p.Off+p.Memsz <= pgoff+memsz {
-			headers = append(headers, &p.ProgHeader)
+			alignedOffset := uint64(0)
+			if p.Off > (p.Vaddr & pageOffsetMask) {
+				alignedOffset = p.Off - (p.Vaddr & pageOffsetMask)
+			}
+			if alignedOffset <= pgoff {
+				headers = append(headers, &p.ProgHeader)
+			}
 		}
 		if p.Type == elf.PT_LOAD {
-			loadables++
+			hasLoadables = true
 		}
 	}
-	if len(headers) == 1 {
-		return headers[0], nil
-	}
-	// Some ELF files don't contain any program segments, e.g. .ko loadable kernel
-	// modules. Don't return an error in such cases.
-	if loadables == 0 {
-		return nil, nil
-	}
-	if len(headers) == 0 {
-		return nil, fmt.Errorf("no program header matches file offset %x and memory size %x", pgoff, memsz)
+	if len(headers) < 2 {
+		return headers, hasLoadables
 	}
 
-	// Segments are mapped page aligned. In some cases, segments may be smaller
-	// than a page, which causes the next segment to start at a file offset that
-	// is logically on the same page if we were to align file offsets by page.
-	// Example:
-	//  LOAD           0x0000000000000000 0x0000000000400000 0x0000000000400000
-	//                 0x00000000000006fc 0x00000000000006fc  R E    0x200000
-	//  LOAD           0x0000000000000e10 0x0000000000600e10 0x0000000000600e10
-	//                 0x0000000000000230 0x0000000000000238  RW     0x200000
-	//
-	// In this case, perf records the following mappings for this executable:
-	// 0 0 [0xc0]: PERF_RECORD_MMAP2 87867/87867: [0x400000(0x1000) @ 0 00:3c 512041 0]: r-xp exename
-	// 0 0 [0xc0]: PERF_RECORD_MMAP2 87867/87867: [0x600000(0x2000) @ 0 00:3c 512041 0]: rw-p exename
-	//
-	// Both mappings have file offset 0. The first mapping is one page length and
-	// it can include only the first loadable segment. Due to page alignment, the
-	// second mapping starts also at file offset 0, and it spans two pages. It can
-	// include both the first and the second loadable segments. We must return the
-	// correct program header to compute the correct base offset.
-	//
-	// We cannot use the mapping protections to distinguish between segments,
-	// because protections are not passed through to this function.
-	// We cannot use the start address to differentiate between segments, because
-	// with ASLR, the mapping start address can be any value.
-	//
-	// We use a heuristic to compute the minimum mapping size required for a
-	// segment, assuming mappings are 4k page aligned, and return the segment that
-	// matches the given mapping size.
-	const pageSize = 4096
-
+	// If we have more than one matching segments, try a strict check on the
+	// segment memory size. We use a heuristic to compute the minimum mapping size
+	// required for a segment, assuming mappings are page aligned.
 	// The memory size based heuristic makes sense only if the mapping size is a
-	// multiple of 4k page size.
+	// multiple of page size.
 	if memsz%pageSize != 0 {
-		return nil, fmt.Errorf("mapping size = %x and %d segments match the passed in mapping", memsz, len(headers))
+		return headers, hasLoadables
 	}
 
-	// Return an error if no segment, or multiple segments match the size, so we can debug.
+	// Return all found headers if we cannot narrow the selection to a single
+	// program segment.
 	var ph *elf.ProgHeader
-	pageMask := ^uint64(pageSize - 1)
 	for _, h := range headers {
 		wantSize := (h.Vaddr+h.Memsz+pageSize-1)&pageMask - (h.Vaddr & pageMask)
 		if wantSize != memsz {
 			continue
 		}
 		if ph != nil {
-			return nil, fmt.Errorf("found second program header (%#v) that matches memsz %x, first program header is %#v", *h, memsz, *ph)
+			// Found a second program header matching, so return all previously
+			// identified headers.
+			return headers, hasLoadables
 		}
 		ph = h
 	}
 	if ph == nil {
-		return nil, fmt.Errorf("found %d matching program headers, but none matches mapping size %x", len(headers), memsz)
+		// No matching header for the strict check. Return all previously identified
+		// headers.
+		return headers, hasLoadables
 	}
-	return ph, nil
+	return []*elf.ProgHeader{ph}, hasLoadables
 }
diff --git a/src/cmd/vendor/github.com/google/pprof/internal/plugin/plugin.go b/src/cmd/vendor/github.com/google/pprof/internal/plugin/plugin.go
index 3a8d0af730..a57a0b20a9 100644
--- a/src/cmd/vendor/github.com/google/pprof/internal/plugin/plugin.go
+++ b/src/cmd/vendor/github.com/google/pprof/internal/plugin/plugin.go
@@ -131,8 +131,9 @@ type ObjFile interface {
 	// Name returns the underlyinf file name, if available
 	Name() string
 
-	// Base returns the base address to use when looking up symbols in the file.
-	Base() uint64
+	// ObjAddr returns the objdump (linker) address corresponding to a runtime
+	// address, and an error.
+	ObjAddr(addr uint64) (uint64, error)
 
 	// BuildID returns the GNU build ID of the file, or an empty string.
 	BuildID() string
diff --git a/src/cmd/vendor/github.com/google/pprof/internal/report/report.go b/src/cmd/vendor/github.com/google/pprof/internal/report/report.go
index bc5685d61e..4a86554880 100644
--- a/src/cmd/vendor/github.com/google/pprof/internal/report/report.go
+++ b/src/cmd/vendor/github.com/google/pprof/internal/report/report.go
@@ -445,7 +445,7 @@ func PrintAssembly(w io.Writer, rpt *Report, obj plugin.ObjTool, maxFuncs int) e
 			return err
 		}
 
-		ns := annotateAssembly(insts, sns, s.base)
+		ns := annotateAssembly(insts, sns, s.file)
 
 		fmt.Fprintf(w, "ROUTINE ======================== %s\n", s.sym.Name[0])
 		for _, name := range s.sym.Name[1:] {
@@ -534,7 +534,6 @@ func symbolsFromBinaries(prof *profile.Profile, g *graph.Graph, rx *regexp.Regex
 			addr = *address
 		}
 		msyms, err := f.Symbols(rx, addr)
-		base := f.Base()
 		f.Close()
 		if err != nil {
 			continue
@@ -543,7 +542,6 @@ func symbolsFromBinaries(prof *profile.Profile, g *graph.Graph, rx *regexp.Regex
 			objSyms = append(objSyms,
 				&objSymbol{
 					sym:  ms,
-					base: base,
 					file: f,
 				},
 			)
@@ -558,7 +556,6 @@ func symbolsFromBinaries(prof *profile.Profile, g *graph.Graph, rx *regexp.Regex
 // added to correspond to sample addresses
 type objSymbol struct {
 	sym  *plugin.Sym
-	base uint64
 	file plugin.ObjFile
 }
 
@@ -578,8 +575,7 @@ func nodesPerSymbol(ns graph.Nodes, symbols []*objSymbol) map[*objSymbol]graph.N
 	for _, s := range symbols {
 		// Gather samples for this symbol.
 		for _, n := range ns {
-			address := n.Info.Address - s.base
-			if address >= s.sym.Start && address < s.sym.End {
+			if address, err := s.file.ObjAddr(n.Info.Address); err == nil && address >= s.sym.Start && address < s.sym.End {
 				symNodes[s] = append(symNodes[s], n)
 			}
 		}
@@ -621,7 +617,7 @@ func (a *assemblyInstruction) cumValue() int64 {
 // annotateAssembly annotates a set of assembly instructions with a
 // set of samples. It returns a set of nodes to display. base is an
 // offset to adjust the sample addresses.
-func annotateAssembly(insts []plugin.Inst, samples graph.Nodes, base uint64) []assemblyInstruction {
+func annotateAssembly(insts []plugin.Inst, samples graph.Nodes, file plugin.ObjFile) []assemblyInstruction {
 	// Add end marker to simplify printing loop.
 	insts = append(insts, plugin.Inst{
 		Addr: ^uint64(0),
@@ -645,7 +641,10 @@ func annotateAssembly(insts []plugin.Inst, samples graph.Nodes, base uint64) []a
 
 		// Sum all the samples until the next instruction (to account
 		// for samples attributed to the middle of an instruction).
-		for next := insts[ix+1].Addr; s < len(samples) && samples[s].Info.Address-base < next; s++ {
+		for next := insts[ix+1].Addr; s < len(samples); s++ {
+			if addr, err := file.ObjAddr(samples[s].Info.Address); err != nil || addr >= next {
+				break
+			}
 			sample := samples[s]
 			n.flatDiv += sample.FlatDiv
 			n.flat += sample.Flat
diff --git a/src/cmd/vendor/github.com/google/pprof/internal/report/source.go b/src/cmd/vendor/github.com/google/pprof/internal/report/source.go
index 4f841eff5d..54245e5f9e 100644
--- a/src/cmd/vendor/github.com/google/pprof/internal/report/source.go
+++ b/src/cmd/vendor/github.com/google/pprof/internal/report/source.go
@@ -132,6 +132,7 @@ func printWebSource(w io.Writer, rpt *Report, obj plugin.ObjTool) error {
 // sourcePrinter holds state needed for generating source+asm HTML listing.
 type sourcePrinter struct {
 	reader     *sourceReader
+	synth      *synthCode
 	objectTool plugin.ObjTool
 	objects    map[string]plugin.ObjFile  // Opened object files
 	sym        *regexp.Regexp             // May be nil
@@ -146,6 +147,12 @@ type sourcePrinter struct {
 	prettyNames map[string]string
 }
 
+// addrInfo holds information for an address we are interested in.
+type addrInfo struct {
+	loc *profile.Location // Always non-nil
+	obj plugin.ObjFile    // May be nil
+}
+
 // instructionInfo holds collected information for an instruction.
 type instructionInfo struct {
 	objAddr   uint64 // Address in object file (with base subtracted out)
@@ -207,6 +214,7 @@ func PrintWebList(w io.Writer, rpt *Report, obj plugin.ObjTool, maxFiles int) er
 func newSourcePrinter(rpt *Report, obj plugin.ObjTool, sourcePath string) *sourcePrinter {
 	sp := &sourcePrinter{
 		reader:      newSourceReader(sourcePath, rpt.options.TrimPath),
+		synth:       newSynthCode(rpt.prof.Mapping),
 		objectTool:  obj,
 		objects:     map[string]plugin.ObjFile{},
 		sym:         rpt.options.Symbol,
@@ -225,19 +233,21 @@ func newSourcePrinter(rpt *Report, obj plugin.ObjTool, sourcePath string) *sourc
 		}
 	}
 
-	addrs := map[uint64]bool{}
+	addrs := map[uint64]addrInfo{}
 	flat := map[uint64]int64{}
 	cum := map[uint64]int64{}
 
 	// Record an interest in the function corresponding to lines[index].
-	markInterest := func(addr uint64, lines []profile.Line, index int) {
-		fn := lines[index]
+	markInterest := func(addr uint64, loc *profile.Location, index int) {
+		fn := loc.Line[index]
 		if fn.Function == nil {
 			return
 		}
 		sp.interest[fn.Function.Name] = true
 		sp.interest[fn.Function.SystemName] = true
-		addrs[addr] = true
+		if _, ok := addrs[addr]; !ok {
+			addrs[addr] = addrInfo{loc, sp.objectFile(loc.Mapping)}
+		}
 	}
 
 	// See if sp.sym matches line.
@@ -270,15 +280,21 @@ func newSourcePrinter(rpt *Report, obj plugin.ObjTool, sourcePath string) *sourc
 				sp.prettyNames[line.Function.SystemName] = line.Function.Name
 			}
 
-			cum[loc.Address] += value
-			if i == 0 {
-				flat[loc.Address] += value
+			addr := loc.Address
+			if addr == 0 {
+				// Some profiles are missing valid addresses.
+				addr = sp.synth.address(loc)
 			}
 
-			if sp.sym == nil || (address != nil && loc.Address == *address) {
+			cum[addr] += value
+			if i == 0 {
+				flat[addr] += value
+			}
+
+			if sp.sym == nil || (address != nil && addr == *address) {
 				// Interested in top-level entry of stack.
 				if len(loc.Line) > 0 {
-					markInterest(loc.Address, loc.Line, len(loc.Line)-1)
+					markInterest(addr, loc, len(loc.Line)-1)
 				}
 				continue
 			}
@@ -287,7 +303,7 @@ func newSourcePrinter(rpt *Report, obj plugin.ObjTool, sourcePath string) *sourc
 			matchFile := (loc.Mapping != nil && sp.sym.MatchString(loc.Mapping.File))
 			for j, line := range loc.Line {
 				if (j == 0 && matchFile) || matches(line) {
-					markInterest(loc.Address, loc.Line, j)
+					markInterest(addr, loc, j)
 				}
 			}
 		}
@@ -306,10 +322,11 @@ func (sp *sourcePrinter) close() {
 	}
 }
 
-func (sp *sourcePrinter) expandAddresses(rpt *Report, addrs map[uint64]bool, flat map[uint64]int64) {
+func (sp *sourcePrinter) expandAddresses(rpt *Report, addrs map[uint64]addrInfo, flat map[uint64]int64) {
 	// We found interesting addresses (ones with non-zero samples) above.
 	// Get covering address ranges and disassemble the ranges.
-	ranges := sp.splitIntoRanges(rpt.prof, addrs, flat)
+	ranges, unprocessed := sp.splitIntoRanges(rpt.prof, addrs, flat)
+	sp.handleUnprocessed(addrs, unprocessed)
 
 	// Trim ranges if there are too many.
 	const maxRanges = 25
@@ -321,9 +338,18 @@ func (sp *sourcePrinter) expandAddresses(rpt *Report, addrs map[uint64]bool, fla
 	}
 
 	for _, r := range ranges {
-		base := r.obj.Base()
-		insts, err := sp.objectTool.Disasm(r.mapping.File, r.begin-base, r.end-base,
-			rpt.options.IntelSyntax)
+		objBegin, err := r.obj.ObjAddr(r.begin)
+		if err != nil {
+			fmt.Fprintf(os.Stderr, "Failed to compute objdump address for range start %x: %v\n", r.begin, err)
+			continue
+		}
+		objEnd, err := r.obj.ObjAddr(r.end)
+		if err != nil {
+			fmt.Fprintf(os.Stderr, "Failed to compute objdump address for range end %x: %v\n", r.end, err)
+			continue
+		}
+		base := r.begin - objBegin
+		insts, err := sp.objectTool.Disasm(r.mapping.File, objBegin, objEnd, rpt.options.IntelSyntax)
 		if err != nil {
 			// TODO(sanjay): Report that the covered addresses are missing.
 			continue
@@ -385,78 +411,115 @@ func (sp *sourcePrinter) expandAddresses(rpt *Report, addrs map[uint64]bool, fla
 				frames = lastFrames
 			}
 
-			// See if the stack contains a function we are interested in.
-			for i, f := range frames {
-				if !sp.interest[f.Func] {
-					continue
-				}
-
-				// Record sub-stack under frame's file/line.
-				fname := canonicalizeFileName(f.File)
-				file := sp.files[fname]
-				if file == nil {
-					file = &sourceFile{
-						fname:    fname,
-						lines:    map[int][]sourceInst{},
-						funcName: map[int]string{},
-					}
-					sp.files[fname] = file
-				}
-				callees := frames[:i]
-				stack := make([]callID, 0, len(callees))
-				for j := len(callees) - 1; j >= 0; j-- { // Reverse so caller is first
-					stack = append(stack, callID{
-						file: callees[j].File,
-						line: callees[j].Line,
-					})
-				}
-				file.lines[f.Line] = append(file.lines[f.Line], sourceInst{addr, stack})
-
-				// Remember the first function name encountered per source line
-				// and assume that that line belongs to that function.
-				if _, ok := file.funcName[f.Line]; !ok {
-					file.funcName[f.Line] = f.Func
-				}
-			}
+			sp.addStack(addr, frames)
 		}
 	}
 }
 
-// splitIntoRanges converts the set of addresses we are interested in into a set of address
-// ranges to disassemble.
-func (sp *sourcePrinter) splitIntoRanges(prof *profile.Profile, set map[uint64]bool, flat map[uint64]int64) []addressRange {
-	// List of mappings so we can stop expanding address ranges at mapping boundaries.
-	mappings := append([]*profile.Mapping{}, prof.Mapping...)
-	sort.Slice(mappings, func(i, j int) bool { return mappings[i].Start < mappings[j].Start })
+func (sp *sourcePrinter) addStack(addr uint64, frames []plugin.Frame) {
+	// See if the stack contains a function we are interested in.
+	for i, f := range frames {
+		if !sp.interest[f.Func] {
+			continue
+		}
 
-	var result []addressRange
-	addrs := make([]uint64, 0, len(set))
-	for addr := range set {
-		addrs = append(addrs, addr)
+		// Record sub-stack under frame's file/line.
+		fname := canonicalizeFileName(f.File)
+		file := sp.files[fname]
+		if file == nil {
+			file = &sourceFile{
+				fname:    fname,
+				lines:    map[int][]sourceInst{},
+				funcName: map[int]string{},
+			}
+			sp.files[fname] = file
+		}
+		callees := frames[:i]
+		stack := make([]callID, 0, len(callees))
+		for j := len(callees) - 1; j >= 0; j-- { // Reverse so caller is first
+			stack = append(stack, callID{
+				file: callees[j].File,
+				line: callees[j].Line,
+			})
+		}
+		file.lines[f.Line] = append(file.lines[f.Line], sourceInst{addr, stack})
+
+		// Remember the first function name encountered per source line
+		// and assume that that line belongs to that function.
+		if _, ok := file.funcName[f.Line]; !ok {
+			file.funcName[f.Line] = f.Func
+		}
+	}
+}
+
+// synthAsm is the special disassembler value used for instructions without an object file.
+const synthAsm = ""
+
+// handleUnprocessed handles addresses that were skipped by splitIntoRanges because they
+// did not belong to a known object file.
+func (sp *sourcePrinter) handleUnprocessed(addrs map[uint64]addrInfo, unprocessed []uint64) {
+	// makeFrames synthesizes a []plugin.Frame list for the specified address.
+	// The result will typically have length 1, but may be longer if address corresponds
+	// to inlined calls.
+	makeFrames := func(addr uint64) []plugin.Frame {
+		loc := addrs[addr].loc
+		stack := make([]plugin.Frame, 0, len(loc.Line))
+		for _, line := range loc.Line {
+			fn := line.Function
+			if fn == nil {
+				continue
+			}
+			stack = append(stack, plugin.Frame{
+				Func: fn.Name,
+				File: fn.Filename,
+				Line: int(line.Line),
+			})
+		}
+		return stack
+	}
+
+	for _, addr := range unprocessed {
+		frames := makeFrames(addr)
+		x := instructionInfo{
+			objAddr: addr,
+			length:  1,
+			disasm:  synthAsm,
+		}
+		if len(frames) > 0 {
+			x.file = frames[0].File
+			x.line = frames[0].Line
+		}
+		sp.insts[addr] = x
+
+		sp.addStack(addr, frames)
+	}
+}
+
+// splitIntoRanges converts the set of addresses we are interested in into a set of address
+// ranges to disassemble. It also returns the set of addresses found that did not have an
+// associated object file and were therefore not added to an address range.
+func (sp *sourcePrinter) splitIntoRanges(prof *profile.Profile, addrMap map[uint64]addrInfo, flat map[uint64]int64) ([]addressRange, []uint64) {
+	// Partition addresses into two sets: ones with a known object file, and ones without.
+	var addrs, unprocessed []uint64
+	for addr, info := range addrMap {
+		if info.obj != nil {
+			addrs = append(addrs, addr)
+		} else {
+			unprocessed = append(unprocessed, addr)
+		}
 	}
 	sort.Slice(addrs, func(i, j int) bool { return addrs[i] < addrs[j] })
 
-	mappingIndex := 0
 	const expand = 500 // How much to expand range to pick up nearby addresses.
+	var result []addressRange
 	for i, n := 0, len(addrs); i < n; {
 		begin, end := addrs[i], addrs[i]
 		sum := flat[begin]
 		i++
 
-		// Advance to mapping containing addrs[i]
-		for mappingIndex < len(mappings) && mappings[mappingIndex].Limit <= begin {
-			mappingIndex++
-		}
-		if mappingIndex >= len(mappings) {
-			// TODO(sanjay): Report missed address and its samples.
-			break
-		}
-		m := mappings[mappingIndex]
-		obj := sp.objectFile(m)
-		if obj == nil {
-			// TODO(sanjay): Report missed address and its samples.
-			continue
-		}
+		info := addrMap[begin]
+		m := info.loc.Mapping
+		obj := info.obj // Non-nil because of the partitioning done above.
 
 		// Find following addresses that are close enough to addrs[i].
 		for i < n && addrs[i] <= end+2*expand && addrs[i] < m.Limit {
@@ -479,7 +542,7 @@ func (sp *sourcePrinter) splitIntoRanges(prof *profile.Profile, set map[uint64]b
 
 		result = append(result, addressRange{begin, end, obj, m, sum})
 	}
-	return result
+	return result, unprocessed
 }
 
 func (sp *sourcePrinter) initSamples(flat, cum map[uint64]int64) {
@@ -665,9 +728,12 @@ func (sp *sourcePrinter) functions(f *sourceFile) []sourceFunction {
 	return funcs
 }
 
-// objectFile return the object for the named file, opening it if necessary.
+// objectFile return the object for the specified mapping, opening it if necessary.
 // It returns nil on error.
 func (sp *sourcePrinter) objectFile(m *profile.Mapping) plugin.ObjFile {
+	if m == nil {
+		return nil
+	}
 	if object, ok := sp.objects[m.File]; ok {
 		return object // May be nil if we detected an error earlier.
 	}
@@ -725,12 +791,28 @@ func printFunctionSourceLine(w io.Writer, lineNo int, flat, cum int64, lineConte
 		return
 	}
 
+	nestedInfo := false
+	cl := "deadsrc"
+	for _, an := range assembly {
+		if len(an.inlineCalls) > 0 || an.instruction != synthAsm {
+			nestedInfo = true
+			cl = "livesrc"
+		}
+	}
+
 	fmt.Fprintf(w,
-		" %6d   %10s %10s %8s  %s ",
-		lineNo,
+		" %6d   %10s %10s %8s  %s ",
+		lineNo, cl,
 		valueOrDot(flat, rpt), valueOrDot(cum, rpt),
 		"", template.HTMLEscapeString(lineContents))
-	srcIndent := indentation(lineContents)
+	if nestedInfo {
+		srcIndent := indentation(lineContents)
+		printNested(w, srcIndent, assembly, reader, rpt)
+	}
+	fmt.Fprintln(w)
+}
+
+func printNested(w io.Writer, srcIndent int, assembly []assemblyInstruction, reader *sourceReader, rpt *Report) {
 	fmt.Fprint(w, "")
 	var curCalls []callID
 	for i, an := range assembly {
@@ -763,6 +845,9 @@ func printFunctionSourceLine(w io.Writer, lineNo int, flat, cum int64, lineConte
 				template.HTMLEscapeString(filepath.Base(c.file)), c.line)
 		}
 		curCalls = an.inlineCalls
+		if an.instruction == synthAsm {
+			continue
+		}
 		text := strings.Repeat(" ", srcIndent+4+4*len(curCalls)) + an.instruction
 		fmt.Fprintf(w, " %8s %10s %10s %8x: %s %s\n",
 			"", valueOrDot(flat, rpt), valueOrDot(cum, rpt), an.address,
@@ -772,7 +857,7 @@ func printFunctionSourceLine(w io.Writer, lineNo int, flat, cum int64, lineConte
 			// would cause double-escaping of file name.
 			fileline)
 	}
-	fmt.Fprintln(w, "")
+	fmt.Fprint(w, "")
 }
 
 // printFunctionClosing prints the end of a function in a weblist report.
diff --git a/src/cmd/vendor/github.com/google/pprof/internal/report/source_html.go b/src/cmd/vendor/github.com/google/pprof/internal/report/source_html.go
index 26e8bdbba8..17c9f6eb94 100644
--- a/src/cmd/vendor/github.com/google/pprof/internal/report/source_html.go
+++ b/src/cmd/vendor/github.com/google/pprof/internal/report/source_html.go
@@ -40,14 +40,7 @@ h1 {
 .inlinesrc {
   color: #000066;
 }
-.deadsrc {
-cursor: pointer;
-}
-.deadsrc:hover {
-background-color: #eeeeee;
-}
 .livesrc {
-color: #0000ff;
 cursor: pointer;
 }
 .livesrc:hover {
diff --git a/src/cmd/vendor/github.com/google/pprof/internal/report/synth.go b/src/cmd/vendor/github.com/google/pprof/internal/report/synth.go
new file mode 100644
index 0000000000..7a35bbcda8
--- /dev/null
+++ b/src/cmd/vendor/github.com/google/pprof/internal/report/synth.go
@@ -0,0 +1,39 @@
+package report
+
+import (
+	"github.com/google/pprof/profile"
+)
+
+// synthCode assigns addresses to locations without an address.
+type synthCode struct {
+	next uint64
+	addr map[*profile.Location]uint64 // Synthesized address assigned to a location
+}
+
+func newSynthCode(mappings []*profile.Mapping) *synthCode {
+	// Find a larger address than any mapping.
+	s := &synthCode{next: 1}
+	for _, m := range mappings {
+		if s.next < m.Limit {
+			s.next = m.Limit
+		}
+	}
+	return s
+}
+
+// address returns the synthetic address for loc, creating one if needed.
+func (s *synthCode) address(loc *profile.Location) uint64 {
+	if loc.Address != 0 {
+		panic("can only synthesize addresses for locations without an address")
+	}
+	if addr, ok := s.addr[loc]; ok {
+		return addr
+	}
+	if s.addr == nil {
+		s.addr = map[*profile.Location]uint64{}
+	}
+	addr := s.next
+	s.next++
+	s.addr[loc] = addr
+	return addr
+}
diff --git a/src/cmd/vendor/github.com/google/pprof/profile/encode.go b/src/cmd/vendor/github.com/google/pprof/profile/encode.go
index 1e84c72d43..ab7f03ae26 100644
--- a/src/cmd/vendor/github.com/google/pprof/profile/encode.go
+++ b/src/cmd/vendor/github.com/google/pprof/profile/encode.go
@@ -308,7 +308,7 @@ func (p *Profile) postDecode() error {
 			if l.strX != 0 {
 				value, err = getString(p.stringTable, &l.strX, err)
 				labels[key] = append(labels[key], value)
-			} else if l.numX != 0 {
+			} else if l.numX != 0 || l.unitX != 0 {
 				numValues := numLabels[key]
 				units := numUnits[key]
 				if l.unitX != 0 {
diff --git a/src/cmd/vendor/github.com/google/pprof/profile/merge.go b/src/cmd/vendor/github.com/google/pprof/profile/merge.go
index 5ab6e9b9b0..9978e7330e 100644
--- a/src/cmd/vendor/github.com/google/pprof/profile/merge.go
+++ b/src/cmd/vendor/github.com/google/pprof/profile/merge.go
@@ -231,7 +231,6 @@ func (pm *profileMerger) mapLocation(src *Location) *Location {
 	}
 
 	if l, ok := pm.locationsByID[src.ID]; ok {
-		pm.locationsByID[src.ID] = l
 		return l
 	}
 
diff --git a/src/cmd/vendor/golang.org/x/mod/modfile/read.go b/src/cmd/vendor/golang.org/x/mod/modfile/read.go
index 2a961ca81c..956f30cbb3 100644
--- a/src/cmd/vendor/golang.org/x/mod/modfile/read.go
+++ b/src/cmd/vendor/golang.org/x/mod/modfile/read.go
@@ -194,12 +194,15 @@ func (x *FileSyntax) updateLine(line *Line, tokens ...string) {
 	line.Token = tokens
 }
 
-func (x *FileSyntax) removeLine(line *Line) {
+// markRemoved modifies line so that it (and its end-of-line comment, if any)
+// will be dropped by (*FileSyntax).Cleanup.
+func (line *Line) markRemoved() {
 	line.Token = nil
+	line.Comments.Suffix = nil
 }
 
 // Cleanup cleans up the file syntax x after any edit operations.
-// To avoid quadratic behavior, removeLine marks the line as dead
+// To avoid quadratic behavior, (*Line).markRemoved marks the line as dead
 // by setting line.Token = nil but does not remove it from the slice
 // in which it appears. After edits have all been indicated,
 // calling Cleanup cleans out the dead lines.
diff --git a/src/cmd/vendor/golang.org/x/mod/modfile/rule.go b/src/cmd/vendor/golang.org/x/mod/modfile/rule.go
index d8242de280..78f83fa714 100644
--- a/src/cmd/vendor/golang.org/x/mod/modfile/rule.go
+++ b/src/cmd/vendor/golang.org/x/mod/modfile/rule.go
@@ -58,13 +58,6 @@ type Go struct {
 	Syntax  *Line
 }
 
-// A Require is a single require statement.
-type Require struct {
-	Mod      module.Version
-	Indirect bool // has "// indirect" comment
-	Syntax   *Line
-}
-
 // An Exclude is a single exclude statement.
 type Exclude struct {
 	Mod    module.Version
@@ -93,6 +86,93 @@ type VersionInterval struct {
 	Low, High string
 }
 
+// A Require is a single require statement.
+type Require struct {
+	Mod      module.Version
+	Indirect bool // has "// indirect" comment
+	Syntax   *Line
+}
+
+func (r *Require) markRemoved() {
+	r.Syntax.markRemoved()
+	*r = Require{}
+}
+
+func (r *Require) setVersion(v string) {
+	r.Mod.Version = v
+
+	if line := r.Syntax; len(line.Token) > 0 {
+		if line.InBlock {
+			// If the line is preceded by an empty line, remove it; see
+			// https://golang.org/issue/33779.
+			if len(line.Comments.Before) == 1 && len(line.Comments.Before[0].Token) == 0 {
+				line.Comments.Before = line.Comments.Before[:0]
+			}
+			if len(line.Token) >= 2 { // example.com v1.2.3
+				line.Token[1] = v
+			}
+		} else {
+			if len(line.Token) >= 3 { // require example.com v1.2.3
+				line.Token[2] = v
+			}
+		}
+	}
+}
+
+// setIndirect sets line to have (or not have) a "// indirect" comment.
+func (r *Require) setIndirect(indirect bool) {
+	r.Indirect = indirect
+	line := r.Syntax
+	if isIndirect(line) == indirect {
+		return
+	}
+	if indirect {
+		// Adding comment.
+		if len(line.Suffix) == 0 {
+			// New comment.
+			line.Suffix = []Comment{{Token: "// indirect", Suffix: true}}
+			return
+		}
+
+		com := &line.Suffix[0]
+		text := strings.TrimSpace(strings.TrimPrefix(com.Token, string(slashSlash)))
+		if text == "" {
+			// Empty comment.
+			com.Token = "// indirect"
+			return
+		}
+
+		// Insert at beginning of existing comment.
+		com.Token = "// indirect; " + text
+		return
+	}
+
+	// Removing comment.
+	f := strings.TrimSpace(strings.TrimPrefix(line.Suffix[0].Token, string(slashSlash)))
+	if f == "indirect" {
+		// Remove whole comment.
+		line.Suffix = nil
+		return
+	}
+
+	// Remove comment prefix.
+	com := &line.Suffix[0]
+	i := strings.Index(com.Token, "indirect;")
+	com.Token = "//" + com.Token[i+len("indirect;"):]
+}
+
+// isIndirect reports whether line has a "// indirect" comment,
+// meaning it is in go.mod only for its effect on indirect dependencies,
+// so that it can be dropped entirely once the effective version of the
+// indirect dependency reaches the given minimum version.
+func isIndirect(line *Line) bool {
+	if len(line.Suffix) == 0 {
+		return false
+	}
+	f := strings.Fields(strings.TrimPrefix(line.Suffix[0].Token, string(slashSlash)))
+	return (len(f) == 1 && f[0] == "indirect" || len(f) > 1 && f[0] == "indirect;")
+}
+
 func (f *File) AddModuleStmt(path string) error {
 	if f.Syntax == nil {
 		f.Syntax = new(FileSyntax)
@@ -217,6 +297,7 @@ func parseToFile(file string, data []byte, fix VersionFixer, strict bool) (parse
 }
 
 var GoVersionRE = lazyregexp.New(`^([1-9][0-9]*)\.(0|[1-9][0-9]*)$`)
+var laxGoVersionRE = lazyregexp.New(`^v?(([1-9][0-9]*)\.(0|[1-9][0-9]*))([^0-9].*)$`)
 
 func (f *File) add(errs *ErrorList, block *LineBlock, line *Line, verb string, args []string, fix VersionFixer, strict bool) {
 	// If strict is false, this module is a dependency.
@@ -267,8 +348,17 @@ func (f *File) add(errs *ErrorList, block *LineBlock, line *Line, verb string, a
 			errorf("go directive expects exactly one argument")
 			return
 		} else if !GoVersionRE.MatchString(args[0]) {
-			errorf("invalid go version '%s': must match format 1.23", args[0])
-			return
+			fixed := false
+			if !strict {
+				if m := laxGoVersionRE.FindStringSubmatch(args[0]); m != nil {
+					args[0] = m[1]
+					fixed = true
+				}
+			}
+			if !fixed {
+				errorf("invalid go version '%s': must match format 1.23", args[0])
+				return
+			}
 		}
 
 		f.Go = &Go{Syntax: line}
@@ -466,58 +556,6 @@ func (f *File) fixRetract(fix VersionFixer, errs *ErrorList) {
 	}
 }
 
-// isIndirect reports whether line has a "// indirect" comment,
-// meaning it is in go.mod only for its effect on indirect dependencies,
-// so that it can be dropped entirely once the effective version of the
-// indirect dependency reaches the given minimum version.
-func isIndirect(line *Line) bool {
-	if len(line.Suffix) == 0 {
-		return false
-	}
-	f := strings.Fields(strings.TrimPrefix(line.Suffix[0].Token, string(slashSlash)))
-	return (len(f) == 1 && f[0] == "indirect" || len(f) > 1 && f[0] == "indirect;")
-}
-
-// setIndirect sets line to have (or not have) a "// indirect" comment.
-func setIndirect(line *Line, indirect bool) {
-	if isIndirect(line) == indirect {
-		return
-	}
-	if indirect {
-		// Adding comment.
-		if len(line.Suffix) == 0 {
-			// New comment.
-			line.Suffix = []Comment{{Token: "// indirect", Suffix: true}}
-			return
-		}
-
-		com := &line.Suffix[0]
-		text := strings.TrimSpace(strings.TrimPrefix(com.Token, string(slashSlash)))
-		if text == "" {
-			// Empty comment.
-			com.Token = "// indirect"
-			return
-		}
-
-		// Insert at beginning of existing comment.
-		com.Token = "// indirect; " + text
-		return
-	}
-
-	// Removing comment.
-	f := strings.TrimSpace(strings.TrimPrefix(line.Suffix[0].Token, string(slashSlash)))
-	if f == "indirect" {
-		// Remove whole comment.
-		line.Suffix = nil
-		return
-	}
-
-	// Remove comment prefix.
-	com := &line.Suffix[0]
-	i := strings.Index(com.Token, "indirect;")
-	com.Token = "//" + com.Token[i+len("indirect;"):]
-}
-
 // IsDirectoryPath reports whether the given path should be interpreted
 // as a directory path. Just like on the go command line, relative paths
 // and rooted paths are directory paths; the rest are module paths.
@@ -825,6 +863,12 @@ func (f *File) AddGoStmt(version string) error {
 	return nil
 }
 
+// AddRequire sets the first require line for path to version vers,
+// preserving any existing comments for that line and removing all
+// other lines for path.
+//
+// If no line currently exists for path, AddRequire adds a new line
+// at the end of the last require block.
 func (f *File) AddRequire(path, vers string) error {
 	need := true
 	for _, r := range f.Require {
@@ -834,7 +878,7 @@ func (f *File) AddRequire(path, vers string) error {
 				f.Syntax.updateLine(r.Syntax, "require", AutoQuote(path), vers)
 				need = false
 			} else {
-				f.Syntax.removeLine(r.Syntax)
+				r.Syntax.markRemoved()
 				*r = Require{}
 			}
 		}
@@ -846,69 +890,235 @@ func (f *File) AddRequire(path, vers string) error {
 	return nil
 }
 
+// AddNewRequire adds a new require line for path at version vers at the end of
+// the last require block, regardless of any existing require lines for path.
 func (f *File) AddNewRequire(path, vers string, indirect bool) {
 	line := f.Syntax.addLine(nil, "require", AutoQuote(path), vers)
-	setIndirect(line, indirect)
-	f.Require = append(f.Require, &Require{module.Version{Path: path, Version: vers}, indirect, line})
+	r := &Require{
+		Mod:    module.Version{Path: path, Version: vers},
+		Syntax: line,
+	}
+	r.setIndirect(indirect)
+	f.Require = append(f.Require, r)
 }
 
+// SetRequire updates the requirements of f to contain exactly req, preserving
+// the existing block structure and line comment contents (except for 'indirect'
+// markings) for the first requirement on each named module path.
+//
+// The Syntax field is ignored for the requirements in req.
+//
+// Any requirements not already present in the file are added to the block
+// containing the last require line.
+//
+// The requirements in req must specify at most one distinct version for each
+// module path.
+//
+// If any existing requirements may be removed, the caller should call Cleanup
+// after all edits are complete.
 func (f *File) SetRequire(req []*Require) {
-	need := make(map[string]string)
-	indirect := make(map[string]bool)
+	type elem struct {
+		version  string
+		indirect bool
+	}
+	need := make(map[string]elem)
 	for _, r := range req {
-		need[r.Mod.Path] = r.Mod.Version
-		indirect[r.Mod.Path] = r.Indirect
-	}
-
-	for _, r := range f.Require {
-		if v, ok := need[r.Mod.Path]; ok {
-			r.Mod.Version = v
-			r.Indirect = indirect[r.Mod.Path]
-		} else {
-			*r = Require{}
+		if prev, dup := need[r.Mod.Path]; dup && prev.version != r.Mod.Version {
+			panic(fmt.Errorf("SetRequire called with conflicting versions for path %s (%s and %s)", r.Mod.Path, prev.version, r.Mod.Version))
 		}
+		need[r.Mod.Path] = elem{r.Mod.Version, r.Indirect}
 	}
 
-	var newStmts []Expr
+	// Update or delete the existing Require entries to preserve
+	// only the first for each module path in req.
+	for _, r := range f.Require {
+		e, ok := need[r.Mod.Path]
+		if ok {
+			r.setVersion(e.version)
+			r.setIndirect(e.indirect)
+		} else {
+			r.markRemoved()
+		}
+		delete(need, r.Mod.Path)
+	}
+
+	// Add new entries in the last block of the file for any paths that weren't
+	// already present.
+	//
+	// This step is nondeterministic, but the final result will be deterministic
+	// because we will sort the block.
+	for path, e := range need {
+		f.AddNewRequire(path, e.version, e.indirect)
+	}
+
+	f.SortBlocks()
+}
+
+// SetRequireSeparateIndirect updates the requirements of f to contain the given
+// requirements. Comment contents (except for 'indirect' markings) are retained
+// from the first existing requirement for each module path, and block structure
+// is maintained as long as the indirect markings match.
+//
+// Any requirements on paths not already present in the file are added. Direct
+// requirements are added to the last block containing *any* other direct
+// requirement. Indirect requirements are added to the last block containing
+// *only* other indirect requirements. If no suitable block exists, a new one is
+// added, with the last block containing a direct dependency (if any)
+// immediately before the first block containing only indirect dependencies.
+//
+// The Syntax field is ignored for requirements in the given blocks.
+func (f *File) SetRequireSeparateIndirect(req []*Require) {
+	type modKey struct {
+		path     string
+		indirect bool
+	}
+	need := make(map[modKey]string)
+	for _, r := range req {
+		need[modKey{r.Mod.Path, r.Indirect}] = r.Mod.Version
+	}
+
+	comments := make(map[string]Comments)
+	for _, r := range f.Require {
+		v, ok := need[modKey{r.Mod.Path, r.Indirect}]
+		if !ok {
+			if _, ok := need[modKey{r.Mod.Path, !r.Indirect}]; ok {
+				if _, dup := comments[r.Mod.Path]; !dup {
+					comments[r.Mod.Path] = r.Syntax.Comments
+				}
+			}
+			r.markRemoved()
+			continue
+		}
+		r.setVersion(v)
+		delete(need, modKey{r.Mod.Path, r.Indirect})
+	}
+
+	var (
+		lastDirectOrMixedBlock Expr
+		firstIndirectOnlyBlock Expr
+		lastIndirectOnlyBlock  Expr
+	)
 	for _, stmt := range f.Syntax.Stmt {
 		switch stmt := stmt.(type) {
-		case *LineBlock:
-			if len(stmt.Token) > 0 && stmt.Token[0] == "require" {
-				var newLines []*Line
-				for _, line := range stmt.Line {
-					if p, err := parseString(&line.Token[0]); err == nil && need[p] != "" {
-						if len(line.Comments.Before) == 1 && len(line.Comments.Before[0].Token) == 0 {
-							line.Comments.Before = line.Comments.Before[:0]
-						}
-						line.Token[1] = need[p]
-						delete(need, p)
-						setIndirect(line, indirect[p])
-						newLines = append(newLines, line)
-					}
-				}
-				if len(newLines) == 0 {
-					continue // drop stmt
-				}
-				stmt.Line = newLines
-			}
-
 		case *Line:
-			if len(stmt.Token) > 0 && stmt.Token[0] == "require" {
-				if p, err := parseString(&stmt.Token[1]); err == nil && need[p] != "" {
-					stmt.Token[2] = need[p]
-					delete(need, p)
-					setIndirect(stmt, indirect[p])
-				} else {
-					continue // drop stmt
+			if len(stmt.Token) == 0 || stmt.Token[0] != "require" {
+				continue
+			}
+			if isIndirect(stmt) {
+				lastIndirectOnlyBlock = stmt
+			} else {
+				lastDirectOrMixedBlock = stmt
+			}
+		case *LineBlock:
+			if len(stmt.Token) == 0 || stmt.Token[0] != "require" {
+				continue
+			}
+			indirectOnly := true
+			for _, line := range stmt.Line {
+				if len(line.Token) == 0 {
+					continue
+				}
+				if !isIndirect(line) {
+					indirectOnly = false
+					break
+				}
+			}
+			if indirectOnly {
+				lastIndirectOnlyBlock = stmt
+				if firstIndirectOnlyBlock == nil {
+					firstIndirectOnlyBlock = stmt
+				}
+			} else {
+				lastDirectOrMixedBlock = stmt
+			}
+		}
+	}
+
+	isOrContainsStmt := func(stmt Expr, target Expr) bool {
+		if stmt == target {
+			return true
+		}
+		if stmt, ok := stmt.(*LineBlock); ok {
+			if target, ok := target.(*Line); ok {
+				for _, line := range stmt.Line {
+					if line == target {
+						return true
+					}
 				}
 			}
 		}
-		newStmts = append(newStmts, stmt)
+		return false
 	}
-	f.Syntax.Stmt = newStmts
 
-	for path, vers := range need {
-		f.AddNewRequire(path, vers, indirect[path])
+	addRequire := func(path, vers string, indirect bool, comments Comments) {
+		var line *Line
+		if indirect {
+			if lastIndirectOnlyBlock != nil {
+				line = f.Syntax.addLine(lastIndirectOnlyBlock, "require", path, vers)
+			} else {
+				// Add a new require block after the last direct-only or mixed "require"
+				// block (if any).
+				//
+				// (f.Syntax.addLine would add the line to an existing "require" block if
+				// present, but here the existing "require" blocks are all direct-only, so
+				// we know we need to add a new block instead.)
+				line = &Line{Token: []string{"require", path, vers}}
+				lastIndirectOnlyBlock = line
+				firstIndirectOnlyBlock = line // only block implies first block
+				if lastDirectOrMixedBlock == nil {
+					f.Syntax.Stmt = append(f.Syntax.Stmt, line)
+				} else {
+					for i, stmt := range f.Syntax.Stmt {
+						if isOrContainsStmt(stmt, lastDirectOrMixedBlock) {
+							f.Syntax.Stmt = append(f.Syntax.Stmt, nil)     // increase size
+							copy(f.Syntax.Stmt[i+2:], f.Syntax.Stmt[i+1:]) // shuffle elements up
+							f.Syntax.Stmt[i+1] = line
+							break
+						}
+					}
+				}
+			}
+		} else {
+			if lastDirectOrMixedBlock != nil {
+				line = f.Syntax.addLine(lastDirectOrMixedBlock, "require", path, vers)
+			} else {
+				// Add a new require block before the first indirect block (if any).
+				//
+				// That way if the file initially contains only indirect lines,
+				// the direct lines still appear before it: we preserve existing
+				// structure, but only to the extent that that structure already
+				// reflects the direct/indirect split.
+				line = &Line{Token: []string{"require", path, vers}}
+				lastDirectOrMixedBlock = line
+				if firstIndirectOnlyBlock == nil {
+					f.Syntax.Stmt = append(f.Syntax.Stmt, line)
+				} else {
+					for i, stmt := range f.Syntax.Stmt {
+						if isOrContainsStmt(stmt, firstIndirectOnlyBlock) {
+							f.Syntax.Stmt = append(f.Syntax.Stmt, nil)   // increase size
+							copy(f.Syntax.Stmt[i+1:], f.Syntax.Stmt[i:]) // shuffle elements up
+							f.Syntax.Stmt[i] = line
+							break
+						}
+					}
+				}
+			}
+		}
+
+		line.Comments.Before = commentsAdd(line.Comments.Before, comments.Before)
+		line.Comments.Suffix = commentsAdd(line.Comments.Suffix, comments.Suffix)
+
+		r := &Require{
+			Mod:      module.Version{Path: path, Version: vers},
+			Indirect: indirect,
+			Syntax:   line,
+		}
+		r.setIndirect(indirect)
+		f.Require = append(f.Require, r)
+	}
+
+	for k, vers := range need {
+		addRequire(k.path, vers, k.indirect, comments[k.path])
 	}
 	f.SortBlocks()
 }
@@ -916,7 +1126,7 @@ func (f *File) SetRequire(req []*Require) {
 func (f *File) DropRequire(path string) error {
 	for _, r := range f.Require {
 		if r.Mod.Path == path {
-			f.Syntax.removeLine(r.Syntax)
+			r.Syntax.markRemoved()
 			*r = Require{}
 		}
 	}
@@ -947,7 +1157,7 @@ func (f *File) AddExclude(path, vers string) error {
 func (f *File) DropExclude(path, vers string) error {
 	for _, x := range f.Exclude {
 		if x.Mod.Path == path && x.Mod.Version == vers {
-			f.Syntax.removeLine(x.Syntax)
+			x.Syntax.markRemoved()
 			*x = Exclude{}
 		}
 	}
@@ -978,7 +1188,7 @@ func (f *File) AddReplace(oldPath, oldVers, newPath, newVers string) error {
 				continue
 			}
 			// Already added; delete other replacements for same.
-			f.Syntax.removeLine(r.Syntax)
+			r.Syntax.markRemoved()
 			*r = Replace{}
 		}
 		if r.Old.Path == oldPath {
@@ -994,7 +1204,7 @@ func (f *File) AddReplace(oldPath, oldVers, newPath, newVers string) error {
 func (f *File) DropReplace(oldPath, oldVers string) error {
 	for _, r := range f.Replace {
 		if r.Old.Path == oldPath && r.Old.Version == oldVers {
-			f.Syntax.removeLine(r.Syntax)
+			r.Syntax.markRemoved()
 			*r = Replace{}
 		}
 	}
@@ -1035,7 +1245,7 @@ func (f *File) AddRetract(vi VersionInterval, rationale string) error {
 func (f *File) DropRetract(vi VersionInterval) error {
 	for _, r := range f.Retract {
 		if r.VersionInterval == vi {
-			f.Syntax.removeLine(r.Syntax)
+			r.Syntax.markRemoved()
 			*r = Retract{}
 		}
 	}
diff --git a/src/cmd/vendor/golang.org/x/sys/unix/mkall.sh b/src/cmd/vendor/golang.org/x/sys/unix/mkall.sh
index d727cad19c..396aadf86d 100644
--- a/src/cmd/vendor/golang.org/x/sys/unix/mkall.sh
+++ b/src/cmd/vendor/golang.org/x/sys/unix/mkall.sh
@@ -70,23 +70,11 @@ aix_ppc64)
 	mksyscall="go run mksyscall_aix_ppc64.go -aix"
 	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
 	;;
-darwin_386)
-	mkerrors="$mkerrors -m32"
-	mksyscall="go run mksyscall.go -l32"
-	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
-	mkasm="go run mkasm_darwin.go"
-	;;
 darwin_amd64)
 	mkerrors="$mkerrors -m64"
 	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
 	mkasm="go run mkasm_darwin.go"
 	;;
-darwin_arm)
-	mkerrors="$mkerrors"
-	mksyscall="go run mksyscall.go -l32"
-	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
-	mkasm="go run mkasm_darwin.go"
-	;;
 darwin_arm64)
 	mkerrors="$mkerrors -m64"
 	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
diff --git a/src/cmd/vendor/golang.org/x/sys/unix/syscall_darwin.1_13.go b/src/cmd/vendor/golang.org/x/sys/unix/syscall_darwin.1_13.go
index 5fc3cda6fc..1596426b1e 100644
--- a/src/cmd/vendor/golang.org/x/sys/unix/syscall_darwin.1_13.go
+++ b/src/cmd/vendor/golang.org/x/sys/unix/syscall_darwin.1_13.go
@@ -17,7 +17,7 @@ import (
 //sys	readdir_r(dir uintptr, entry *Dirent, result **Dirent) (res Errno)
 
 func fdopendir(fd int) (dir uintptr, err error) {
-	r0, _, e1 := syscall_syscallPtr(funcPC(libc_fdopendir_trampoline), uintptr(fd), 0, 0)
+	r0, _, e1 := syscall_syscallPtr(libc_fdopendir_trampoline_addr, uintptr(fd), 0, 0)
 	dir = uintptr(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -25,7 +25,7 @@ func fdopendir(fd int) (dir uintptr, err error) {
 	return
 }
 
-func libc_fdopendir_trampoline()
+var libc_fdopendir_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_fdopendir fdopendir "/usr/lib/libSystem.B.dylib"
 
diff --git a/src/cmd/vendor/golang.org/x/sys/unix/syscall_darwin_386.go b/src/cmd/vendor/golang.org/x/sys/unix/syscall_darwin_386.go
deleted file mode 100644
index 6474677122..0000000000
--- a/src/cmd/vendor/golang.org/x/sys/unix/syscall_darwin_386.go
+++ /dev/null
@@ -1,51 +0,0 @@
-// Copyright 2009 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-//go:build 386 && darwin
-// +build 386,darwin
-
-package unix
-
-import "syscall"
-
-func setTimespec(sec, nsec int64) Timespec {
-	return Timespec{Sec: int32(sec), Nsec: int32(nsec)}
-}
-
-func setTimeval(sec, usec int64) Timeval {
-	return Timeval{Sec: int32(sec), Usec: int32(usec)}
-}
-
-func SetKevent(k *Kevent_t, fd, mode, flags int) {
-	k.Ident = uint32(fd)
-	k.Filter = int16(mode)
-	k.Flags = uint16(flags)
-}
-
-func (iov *Iovec) SetLen(length int) {
-	iov.Len = uint32(length)
-}
-
-func (msghdr *Msghdr) SetControllen(length int) {
-	msghdr.Controllen = uint32(length)
-}
-
-func (msghdr *Msghdr) SetIovlen(length int) {
-	msghdr.Iovlen = int32(length)
-}
-
-func (cmsg *Cmsghdr) SetLen(length int) {
-	cmsg.Len = uint32(length)
-}
-
-func Syscall9(num, a1, a2, a3, a4, a5, a6, a7, a8, a9 uintptr) (r1, r2 uintptr, err syscall.Errno)
-
-//sys	Fstat(fd int, stat *Stat_t) (err error) = SYS_FSTAT64
-//sys	Fstatat(fd int, path string, stat *Stat_t, flags int) (err error) = SYS_FSTATAT64
-//sys	Fstatfs(fd int, stat *Statfs_t) (err error) = SYS_FSTATFS64
-//sys	getfsstat(buf unsafe.Pointer, size uintptr, flags int) (n int, err error) = SYS_GETFSSTAT64
-//sys	Lstat(path string, stat *Stat_t) (err error) = SYS_LSTAT64
-//sys	ptrace1(request int, pid int, addr uintptr, data uintptr) (err error) = SYS_ptrace
-//sys	Stat(path string, stat *Stat_t) (err error) = SYS_STAT64
-//sys	Statfs(path string, stat *Statfs_t) (err error) = SYS_STATFS64
diff --git a/src/cmd/vendor/golang.org/x/sys/unix/syscall_darwin_arm.go b/src/cmd/vendor/golang.org/x/sys/unix/syscall_darwin_arm.go
deleted file mode 100644
index d30735c5d6..0000000000
--- a/src/cmd/vendor/golang.org/x/sys/unix/syscall_darwin_arm.go
+++ /dev/null
@@ -1,51 +0,0 @@
-// Copyright 2015 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package unix
-
-import "syscall"
-
-func ptrace1(request int, pid int, addr uintptr, data uintptr) error {
-	return ENOTSUP
-}
-
-func setTimespec(sec, nsec int64) Timespec {
-	return Timespec{Sec: int32(sec), Nsec: int32(nsec)}
-}
-
-func setTimeval(sec, usec int64) Timeval {
-	return Timeval{Sec: int32(sec), Usec: int32(usec)}
-}
-
-func SetKevent(k *Kevent_t, fd, mode, flags int) {
-	k.Ident = uint32(fd)
-	k.Filter = int16(mode)
-	k.Flags = uint16(flags)
-}
-
-func (iov *Iovec) SetLen(length int) {
-	iov.Len = uint32(length)
-}
-
-func (msghdr *Msghdr) SetControllen(length int) {
-	msghdr.Controllen = uint32(length)
-}
-
-func (msghdr *Msghdr) SetIovlen(length int) {
-	msghdr.Iovlen = int32(length)
-}
-
-func (cmsg *Cmsghdr) SetLen(length int) {
-	cmsg.Len = uint32(length)
-}
-
-func Syscall9(num, a1, a2, a3, a4, a5, a6, a7, a8, a9 uintptr) (r1, r2 uintptr, err syscall.Errno) // sic
-
-//sys	Fstat(fd int, stat *Stat_t) (err error)
-//sys	Fstatat(fd int, path string, stat *Stat_t, flags int) (err error)
-//sys	Fstatfs(fd int, stat *Statfs_t) (err error)
-//sys	getfsstat(buf unsafe.Pointer, size uintptr, flags int) (n int, err error) = SYS_GETFSSTAT
-//sys	Lstat(path string, stat *Stat_t) (err error)
-//sys	Stat(path string, stat *Stat_t) (err error)
-//sys	Statfs(path string, stat *Statfs_t) (err error)
diff --git a/src/cmd/vendor/golang.org/x/sys/unix/syscall_darwin_libSystem.go b/src/cmd/vendor/golang.org/x/sys/unix/syscall_darwin_libSystem.go
index 38bec30026..53c96641f8 100644
--- a/src/cmd/vendor/golang.org/x/sys/unix/syscall_darwin_libSystem.go
+++ b/src/cmd/vendor/golang.org/x/sys/unix/syscall_darwin_libSystem.go
@@ -7,7 +7,7 @@
 
 package unix
 
-import "unsafe"
+import _ "unsafe"
 
 // Implemented in the runtime package (runtime/sys_darwin.go)
 func syscall_syscall(fn, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno)
@@ -25,10 +25,3 @@ func syscall_syscallPtr(fn, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno)
 //go:linkname syscall_rawSyscall syscall.rawSyscall
 //go:linkname syscall_rawSyscall6 syscall.rawSyscall6
 //go:linkname syscall_syscallPtr syscall.syscallPtr
-
-// Find the entry point for f. See comments in runtime/proc.go for the
-// function of the same name.
-//go:nosplit
-func funcPC(f func()) uintptr {
-	return **(**uintptr)(unsafe.Pointer(&f))
-}
diff --git a/src/cmd/vendor/golang.org/x/sys/unix/zerrors_darwin_386.go b/src/cmd/vendor/golang.org/x/sys/unix/zerrors_darwin_386.go
deleted file mode 100644
index 7ee196f7fc..0000000000
--- a/src/cmd/vendor/golang.org/x/sys/unix/zerrors_darwin_386.go
+++ /dev/null
@@ -1,1789 +0,0 @@
-// mkerrors.sh -m32
-// Code generated by the command above; see README.md. DO NOT EDIT.
-
-//go:build 386 && darwin
-// +build 386,darwin
-
-// Code generated by cmd/cgo -godefs; DO NOT EDIT.
-// cgo -godefs -- -m32 _const.go
-
-package unix
-
-import "syscall"
-
-const (
-	AF_APPLETALK                      = 0x10
-	AF_CCITT                          = 0xa
-	AF_CHAOS                          = 0x5
-	AF_CNT                            = 0x15
-	AF_COIP                           = 0x14
-	AF_DATAKIT                        = 0x9
-	AF_DECnet                         = 0xc
-	AF_DLI                            = 0xd
-	AF_E164                           = 0x1c
-	AF_ECMA                           = 0x8
-	AF_HYLINK                         = 0xf
-	AF_IEEE80211                      = 0x25
-	AF_IMPLINK                        = 0x3
-	AF_INET                           = 0x2
-	AF_INET6                          = 0x1e
-	AF_IPX                            = 0x17
-	AF_ISDN                           = 0x1c
-	AF_ISO                            = 0x7
-	AF_LAT                            = 0xe
-	AF_LINK                           = 0x12
-	AF_LOCAL                          = 0x1
-	AF_MAX                            = 0x28
-	AF_NATM                           = 0x1f
-	AF_NDRV                           = 0x1b
-	AF_NETBIOS                        = 0x21
-	AF_NS                             = 0x6
-	AF_OSI                            = 0x7
-	AF_PPP                            = 0x22
-	AF_PUP                            = 0x4
-	AF_RESERVED_36                    = 0x24
-	AF_ROUTE                          = 0x11
-	AF_SIP                            = 0x18
-	AF_SNA                            = 0xb
-	AF_SYSTEM                         = 0x20
-	AF_SYS_CONTROL                    = 0x2
-	AF_UNIX                           = 0x1
-	AF_UNSPEC                         = 0x0
-	AF_UTUN                           = 0x26
-	ALTWERASE                         = 0x200
-	ATTR_BIT_MAP_COUNT                = 0x5
-	ATTR_CMN_ACCESSMASK               = 0x20000
-	ATTR_CMN_ACCTIME                  = 0x1000
-	ATTR_CMN_ADDEDTIME                = 0x10000000
-	ATTR_CMN_BKUPTIME                 = 0x2000
-	ATTR_CMN_CHGTIME                  = 0x800
-	ATTR_CMN_CRTIME                   = 0x200
-	ATTR_CMN_DATA_PROTECT_FLAGS       = 0x40000000
-	ATTR_CMN_DEVID                    = 0x2
-	ATTR_CMN_DOCUMENT_ID              = 0x100000
-	ATTR_CMN_ERROR                    = 0x20000000
-	ATTR_CMN_EXTENDED_SECURITY        = 0x400000
-	ATTR_CMN_FILEID                   = 0x2000000
-	ATTR_CMN_FLAGS                    = 0x40000
-	ATTR_CMN_FNDRINFO                 = 0x4000
-	ATTR_CMN_FSID                     = 0x4
-	ATTR_CMN_FULLPATH                 = 0x8000000
-	ATTR_CMN_GEN_COUNT                = 0x80000
-	ATTR_CMN_GRPID                    = 0x10000
-	ATTR_CMN_GRPUUID                  = 0x1000000
-	ATTR_CMN_MODTIME                  = 0x400
-	ATTR_CMN_NAME                     = 0x1
-	ATTR_CMN_NAMEDATTRCOUNT           = 0x80000
-	ATTR_CMN_NAMEDATTRLIST            = 0x100000
-	ATTR_CMN_OBJID                    = 0x20
-	ATTR_CMN_OBJPERMANENTID           = 0x40
-	ATTR_CMN_OBJTAG                   = 0x10
-	ATTR_CMN_OBJTYPE                  = 0x8
-	ATTR_CMN_OWNERID                  = 0x8000
-	ATTR_CMN_PARENTID                 = 0x4000000
-	ATTR_CMN_PAROBJID                 = 0x80
-	ATTR_CMN_RETURNED_ATTRS           = 0x80000000
-	ATTR_CMN_SCRIPT                   = 0x100
-	ATTR_CMN_SETMASK                  = 0x41c7ff00
-	ATTR_CMN_USERACCESS               = 0x200000
-	ATTR_CMN_UUID                     = 0x800000
-	ATTR_CMN_VALIDMASK                = 0xffffffff
-	ATTR_CMN_VOLSETMASK               = 0x6700
-	ATTR_FILE_ALLOCSIZE               = 0x4
-	ATTR_FILE_CLUMPSIZE               = 0x10
-	ATTR_FILE_DATAALLOCSIZE           = 0x400
-	ATTR_FILE_DATAEXTENTS             = 0x800
-	ATTR_FILE_DATALENGTH              = 0x200
-	ATTR_FILE_DEVTYPE                 = 0x20
-	ATTR_FILE_FILETYPE                = 0x40
-	ATTR_FILE_FORKCOUNT               = 0x80
-	ATTR_FILE_FORKLIST                = 0x100
-	ATTR_FILE_IOBLOCKSIZE             = 0x8
-	ATTR_FILE_LINKCOUNT               = 0x1
-	ATTR_FILE_RSRCALLOCSIZE           = 0x2000
-	ATTR_FILE_RSRCEXTENTS             = 0x4000
-	ATTR_FILE_RSRCLENGTH              = 0x1000
-	ATTR_FILE_SETMASK                 = 0x20
-	ATTR_FILE_TOTALSIZE               = 0x2
-	ATTR_FILE_VALIDMASK               = 0x37ff
-	ATTR_VOL_ALLOCATIONCLUMP          = 0x40
-	ATTR_VOL_ATTRIBUTES               = 0x40000000
-	ATTR_VOL_CAPABILITIES             = 0x20000
-	ATTR_VOL_DIRCOUNT                 = 0x400
-	ATTR_VOL_ENCODINGSUSED            = 0x10000
-	ATTR_VOL_FILECOUNT                = 0x200
-	ATTR_VOL_FSTYPE                   = 0x1
-	ATTR_VOL_INFO                     = 0x80000000
-	ATTR_VOL_IOBLOCKSIZE              = 0x80
-	ATTR_VOL_MAXOBJCOUNT              = 0x800
-	ATTR_VOL_MINALLOCATION            = 0x20
-	ATTR_VOL_MOUNTEDDEVICE            = 0x8000
-	ATTR_VOL_MOUNTFLAGS               = 0x4000
-	ATTR_VOL_MOUNTPOINT               = 0x1000
-	ATTR_VOL_NAME                     = 0x2000
-	ATTR_VOL_OBJCOUNT                 = 0x100
-	ATTR_VOL_QUOTA_SIZE               = 0x10000000
-	ATTR_VOL_RESERVED_SIZE            = 0x20000000
-	ATTR_VOL_SETMASK                  = 0x80002000
-	ATTR_VOL_SIGNATURE                = 0x2
-	ATTR_VOL_SIZE                     = 0x4
-	ATTR_VOL_SPACEAVAIL               = 0x10
-	ATTR_VOL_SPACEFREE                = 0x8
-	ATTR_VOL_UUID                     = 0x40000
-	ATTR_VOL_VALIDMASK                = 0xf007ffff
-	B0                                = 0x0
-	B110                              = 0x6e
-	B115200                           = 0x1c200
-	B1200                             = 0x4b0
-	B134                              = 0x86
-	B14400                            = 0x3840
-	B150                              = 0x96
-	B1800                             = 0x708
-	B19200                            = 0x4b00
-	B200                              = 0xc8
-	B230400                           = 0x38400
-	B2400                             = 0x960
-	B28800                            = 0x7080
-	B300                              = 0x12c
-	B38400                            = 0x9600
-	B4800                             = 0x12c0
-	B50                               = 0x32
-	B57600                            = 0xe100
-	B600                              = 0x258
-	B7200                             = 0x1c20
-	B75                               = 0x4b
-	B76800                            = 0x12c00
-	B9600                             = 0x2580
-	BIOCFLUSH                         = 0x20004268
-	BIOCGBLEN                         = 0x40044266
-	BIOCGDLT                          = 0x4004426a
-	BIOCGDLTLIST                      = 0xc00c4279
-	BIOCGETIF                         = 0x4020426b
-	BIOCGHDRCMPLT                     = 0x40044274
-	BIOCGRSIG                         = 0x40044272
-	BIOCGRTIMEOUT                     = 0x4008426e
-	BIOCGSEESENT                      = 0x40044276
-	BIOCGSTATS                        = 0x4008426f
-	BIOCIMMEDIATE                     = 0x80044270
-	BIOCPROMISC                       = 0x20004269
-	BIOCSBLEN                         = 0xc0044266
-	BIOCSDLT                          = 0x80044278
-	BIOCSETF                          = 0x80084267
-	BIOCSETFNR                        = 0x8008427e
-	BIOCSETIF                         = 0x8020426c
-	BIOCSHDRCMPLT                     = 0x80044275
-	BIOCSRSIG                         = 0x80044273
-	BIOCSRTIMEOUT                     = 0x8008426d
-	BIOCSSEESENT                      = 0x80044277
-	BIOCVERSION                       = 0x40044271
-	BPF_A                             = 0x10
-	BPF_ABS                           = 0x20
-	BPF_ADD                           = 0x0
-	BPF_ALIGNMENT                     = 0x4
-	BPF_ALU                           = 0x4
-	BPF_AND                           = 0x50
-	BPF_B                             = 0x10
-	BPF_DIV                           = 0x30
-	BPF_H                             = 0x8
-	BPF_IMM                           = 0x0
-	BPF_IND                           = 0x40
-	BPF_JA                            = 0x0
-	BPF_JEQ                           = 0x10
-	BPF_JGE                           = 0x30
-	BPF_JGT                           = 0x20
-	BPF_JMP                           = 0x5
-	BPF_JSET                          = 0x40
-	BPF_K                             = 0x0
-	BPF_LD                            = 0x0
-	BPF_LDX                           = 0x1
-	BPF_LEN                           = 0x80
-	BPF_LSH                           = 0x60
-	BPF_MAJOR_VERSION                 = 0x1
-	BPF_MAXBUFSIZE                    = 0x80000
-	BPF_MAXINSNS                      = 0x200
-	BPF_MEM                           = 0x60
-	BPF_MEMWORDS                      = 0x10
-	BPF_MINBUFSIZE                    = 0x20
-	BPF_MINOR_VERSION                 = 0x1
-	BPF_MISC                          = 0x7
-	BPF_MSH                           = 0xa0
-	BPF_MUL                           = 0x20
-	BPF_NEG                           = 0x80
-	BPF_OR                            = 0x40
-	BPF_RELEASE                       = 0x30bb6
-	BPF_RET                           = 0x6
-	BPF_RSH                           = 0x70
-	BPF_ST                            = 0x2
-	BPF_STX                           = 0x3
-	BPF_SUB                           = 0x10
-	BPF_TAX                           = 0x0
-	BPF_TXA                           = 0x80
-	BPF_W                             = 0x0
-	BPF_X                             = 0x8
-	BRKINT                            = 0x2
-	BS0                               = 0x0
-	BS1                               = 0x8000
-	BSDLY                             = 0x8000
-	CFLUSH                            = 0xf
-	CLOCAL                            = 0x8000
-	CLOCK_MONOTONIC                   = 0x6
-	CLOCK_MONOTONIC_RAW               = 0x4
-	CLOCK_MONOTONIC_RAW_APPROX        = 0x5
-	CLOCK_PROCESS_CPUTIME_ID          = 0xc
-	CLOCK_REALTIME                    = 0x0
-	CLOCK_THREAD_CPUTIME_ID           = 0x10
-	CLOCK_UPTIME_RAW                  = 0x8
-	CLOCK_UPTIME_RAW_APPROX           = 0x9
-	CLONE_NOFOLLOW                    = 0x1
-	CLONE_NOOWNERCOPY                 = 0x2
-	CR0                               = 0x0
-	CR1                               = 0x1000
-	CR2                               = 0x2000
-	CR3                               = 0x3000
-	CRDLY                             = 0x3000
-	CREAD                             = 0x800
-	CRTSCTS                           = 0x30000
-	CS5                               = 0x0
-	CS6                               = 0x100
-	CS7                               = 0x200
-	CS8                               = 0x300
-	CSIZE                             = 0x300
-	CSTART                            = 0x11
-	CSTATUS                           = 0x14
-	CSTOP                             = 0x13
-	CSTOPB                            = 0x400
-	CSUSP                             = 0x1a
-	CTLIOCGINFO                       = 0xc0644e03
-	CTL_HW                            = 0x6
-	CTL_KERN                          = 0x1
-	CTL_MAXNAME                       = 0xc
-	CTL_NET                           = 0x4
-	DLT_A429                          = 0xb8
-	DLT_A653_ICM                      = 0xb9
-	DLT_AIRONET_HEADER                = 0x78
-	DLT_AOS                           = 0xde
-	DLT_APPLE_IP_OVER_IEEE1394        = 0x8a
-	DLT_ARCNET                        = 0x7
-	DLT_ARCNET_LINUX                  = 0x81
-	DLT_ATM_CLIP                      = 0x13
-	DLT_ATM_RFC1483                   = 0xb
-	DLT_AURORA                        = 0x7e
-	DLT_AX25                          = 0x3
-	DLT_AX25_KISS                     = 0xca
-	DLT_BACNET_MS_TP                  = 0xa5
-	DLT_BLUETOOTH_HCI_H4              = 0xbb
-	DLT_BLUETOOTH_HCI_H4_WITH_PHDR    = 0xc9
-	DLT_CAN20B                        = 0xbe
-	DLT_CAN_SOCKETCAN                 = 0xe3
-	DLT_CHAOS                         = 0x5
-	DLT_CHDLC                         = 0x68
-	DLT_CISCO_IOS                     = 0x76
-	DLT_C_HDLC                        = 0x68
-	DLT_C_HDLC_WITH_DIR               = 0xcd
-	DLT_DBUS                          = 0xe7
-	DLT_DECT                          = 0xdd
-	DLT_DOCSIS                        = 0x8f
-	DLT_DVB_CI                        = 0xeb
-	DLT_ECONET                        = 0x73
-	DLT_EN10MB                        = 0x1
-	DLT_EN3MB                         = 0x2
-	DLT_ENC                           = 0x6d
-	DLT_ERF                           = 0xc5
-	DLT_ERF_ETH                       = 0xaf
-	DLT_ERF_POS                       = 0xb0
-	DLT_FC_2                          = 0xe0
-	DLT_FC_2_WITH_FRAME_DELIMS        = 0xe1
-	DLT_FDDI                          = 0xa
-	DLT_FLEXRAY                       = 0xd2
-	DLT_FRELAY                        = 0x6b
-	DLT_FRELAY_WITH_DIR               = 0xce
-	DLT_GCOM_SERIAL                   = 0xad
-	DLT_GCOM_T1E1                     = 0xac
-	DLT_GPF_F                         = 0xab
-	DLT_GPF_T                         = 0xaa
-	DLT_GPRS_LLC                      = 0xa9
-	DLT_GSMTAP_ABIS                   = 0xda
-	DLT_GSMTAP_UM                     = 0xd9
-	DLT_HHDLC                         = 0x79
-	DLT_IBM_SN                        = 0x92
-	DLT_IBM_SP                        = 0x91
-	DLT_IEEE802                       = 0x6
-	DLT_IEEE802_11                    = 0x69
-	DLT_IEEE802_11_RADIO              = 0x7f
-	DLT_IEEE802_11_RADIO_AVS          = 0xa3
-	DLT_IEEE802_15_4                  = 0xc3
-	DLT_IEEE802_15_4_LINUX            = 0xbf
-	DLT_IEEE802_15_4_NOFCS            = 0xe6
-	DLT_IEEE802_15_4_NONASK_PHY       = 0xd7
-	DLT_IEEE802_16_MAC_CPS            = 0xbc
-	DLT_IEEE802_16_MAC_CPS_RADIO      = 0xc1
-	DLT_IPFILTER                      = 0x74
-	DLT_IPMB                          = 0xc7
-	DLT_IPMB_LINUX                    = 0xd1
-	DLT_IPNET                         = 0xe2
-	DLT_IPOIB                         = 0xf2
-	DLT_IPV4                          = 0xe4
-	DLT_IPV6                          = 0xe5
-	DLT_IP_OVER_FC                    = 0x7a
-	DLT_JUNIPER_ATM1                  = 0x89
-	DLT_JUNIPER_ATM2                  = 0x87
-	DLT_JUNIPER_ATM_CEMIC             = 0xee
-	DLT_JUNIPER_CHDLC                 = 0xb5
-	DLT_JUNIPER_ES                    = 0x84
-	DLT_JUNIPER_ETHER                 = 0xb2
-	DLT_JUNIPER_FIBRECHANNEL          = 0xea
-	DLT_JUNIPER_FRELAY                = 0xb4
-	DLT_JUNIPER_GGSN                  = 0x85
-	DLT_JUNIPER_ISM                   = 0xc2
-	DLT_JUNIPER_MFR                   = 0x86
-	DLT_JUNIPER_MLFR                  = 0x83
-	DLT_JUNIPER_MLPPP                 = 0x82
-	DLT_JUNIPER_MONITOR               = 0xa4
-	DLT_JUNIPER_PIC_PEER              = 0xae
-	DLT_JUNIPER_PPP                   = 0xb3
-	DLT_JUNIPER_PPPOE                 = 0xa7
-	DLT_JUNIPER_PPPOE_ATM             = 0xa8
-	DLT_JUNIPER_SERVICES              = 0x88
-	DLT_JUNIPER_SRX_E2E               = 0xe9
-	DLT_JUNIPER_ST                    = 0xc8
-	DLT_JUNIPER_VP                    = 0xb7
-	DLT_JUNIPER_VS                    = 0xe8
-	DLT_LAPB_WITH_DIR                 = 0xcf
-	DLT_LAPD                          = 0xcb
-	DLT_LIN                           = 0xd4
-	DLT_LINUX_EVDEV                   = 0xd8
-	DLT_LINUX_IRDA                    = 0x90
-	DLT_LINUX_LAPD                    = 0xb1
-	DLT_LINUX_PPP_WITHDIRECTION       = 0xa6
-	DLT_LINUX_SLL                     = 0x71
-	DLT_LOOP                          = 0x6c
-	DLT_LTALK                         = 0x72
-	DLT_MATCHING_MAX                  = 0xf5
-	DLT_MATCHING_MIN                  = 0x68
-	DLT_MFR                           = 0xb6
-	DLT_MOST                          = 0xd3
-	DLT_MPEG_2_TS                     = 0xf3
-	DLT_MPLS                          = 0xdb
-	DLT_MTP2                          = 0x8c
-	DLT_MTP2_WITH_PHDR                = 0x8b
-	DLT_MTP3                          = 0x8d
-	DLT_MUX27010                      = 0xec
-	DLT_NETANALYZER                   = 0xf0
-	DLT_NETANALYZER_TRANSPARENT       = 0xf1
-	DLT_NFC_LLCP                      = 0xf5
-	DLT_NFLOG                         = 0xef
-	DLT_NG40                          = 0xf4
-	DLT_NULL                          = 0x0
-	DLT_PCI_EXP                       = 0x7d
-	DLT_PFLOG                         = 0x75
-	DLT_PFSYNC                        = 0x12
-	DLT_PPI                           = 0xc0
-	DLT_PPP                           = 0x9
-	DLT_PPP_BSDOS                     = 0x10
-	DLT_PPP_ETHER                     = 0x33
-	DLT_PPP_PPPD                      = 0xa6
-	DLT_PPP_SERIAL                    = 0x32
-	DLT_PPP_WITH_DIR                  = 0xcc
-	DLT_PPP_WITH_DIRECTION            = 0xa6
-	DLT_PRISM_HEADER                  = 0x77
-	DLT_PRONET                        = 0x4
-	DLT_RAIF1                         = 0xc6
-	DLT_RAW                           = 0xc
-	DLT_RIO                           = 0x7c
-	DLT_SCCP                          = 0x8e
-	DLT_SITA                          = 0xc4
-	DLT_SLIP                          = 0x8
-	DLT_SLIP_BSDOS                    = 0xf
-	DLT_STANAG_5066_D_PDU             = 0xed
-	DLT_SUNATM                        = 0x7b
-	DLT_SYMANTEC_FIREWALL             = 0x63
-	DLT_TZSP                          = 0x80
-	DLT_USB                           = 0xba
-	DLT_USB_LINUX                     = 0xbd
-	DLT_USB_LINUX_MMAPPED             = 0xdc
-	DLT_USER0                         = 0x93
-	DLT_USER1                         = 0x94
-	DLT_USER10                        = 0x9d
-	DLT_USER11                        = 0x9e
-	DLT_USER12                        = 0x9f
-	DLT_USER13                        = 0xa0
-	DLT_USER14                        = 0xa1
-	DLT_USER15                        = 0xa2
-	DLT_USER2                         = 0x95
-	DLT_USER3                         = 0x96
-	DLT_USER4                         = 0x97
-	DLT_USER5                         = 0x98
-	DLT_USER6                         = 0x99
-	DLT_USER7                         = 0x9a
-	DLT_USER8                         = 0x9b
-	DLT_USER9                         = 0x9c
-	DLT_WIHART                        = 0xdf
-	DLT_X2E_SERIAL                    = 0xd5
-	DLT_X2E_XORAYA                    = 0xd6
-	DT_BLK                            = 0x6
-	DT_CHR                            = 0x2
-	DT_DIR                            = 0x4
-	DT_FIFO                           = 0x1
-	DT_LNK                            = 0xa
-	DT_REG                            = 0x8
-	DT_SOCK                           = 0xc
-	DT_UNKNOWN                        = 0x0
-	DT_WHT                            = 0xe
-	ECHO                              = 0x8
-	ECHOCTL                           = 0x40
-	ECHOE                             = 0x2
-	ECHOK                             = 0x4
-	ECHOKE                            = 0x1
-	ECHONL                            = 0x10
-	ECHOPRT                           = 0x20
-	EVFILT_AIO                        = -0x3
-	EVFILT_EXCEPT                     = -0xf
-	EVFILT_FS                         = -0x9
-	EVFILT_MACHPORT                   = -0x8
-	EVFILT_PROC                       = -0x5
-	EVFILT_READ                       = -0x1
-	EVFILT_SIGNAL                     = -0x6
-	EVFILT_SYSCOUNT                   = 0xf
-	EVFILT_THREADMARKER               = 0xf
-	EVFILT_TIMER                      = -0x7
-	EVFILT_USER                       = -0xa
-	EVFILT_VM                         = -0xc
-	EVFILT_VNODE                      = -0x4
-	EVFILT_WRITE                      = -0x2
-	EV_ADD                            = 0x1
-	EV_CLEAR                          = 0x20
-	EV_DELETE                         = 0x2
-	EV_DISABLE                        = 0x8
-	EV_DISPATCH                       = 0x80
-	EV_DISPATCH2                      = 0x180
-	EV_ENABLE                         = 0x4
-	EV_EOF                            = 0x8000
-	EV_ERROR                          = 0x4000
-	EV_FLAG0                          = 0x1000
-	EV_FLAG1                          = 0x2000
-	EV_ONESHOT                        = 0x10
-	EV_OOBAND                         = 0x2000
-	EV_POLL                           = 0x1000
-	EV_RECEIPT                        = 0x40
-	EV_SYSFLAGS                       = 0xf000
-	EV_UDATA_SPECIFIC                 = 0x100
-	EV_VANISHED                       = 0x200
-	EXTA                              = 0x4b00
-	EXTB                              = 0x9600
-	EXTPROC                           = 0x800
-	FD_CLOEXEC                        = 0x1
-	FD_SETSIZE                        = 0x400
-	FF0                               = 0x0
-	FF1                               = 0x4000
-	FFDLY                             = 0x4000
-	FLUSHO                            = 0x800000
-	FSOPT_ATTR_CMN_EXTENDED           = 0x20
-	FSOPT_NOFOLLOW                    = 0x1
-	FSOPT_NOINMEMUPDATE               = 0x2
-	FSOPT_PACK_INVAL_ATTRS            = 0x8
-	FSOPT_REPORT_FULLSIZE             = 0x4
-	F_ADDFILESIGS                     = 0x3d
-	F_ADDFILESIGS_FOR_DYLD_SIM        = 0x53
-	F_ADDFILESIGS_RETURN              = 0x61
-	F_ADDSIGS                         = 0x3b
-	F_ALLOCATEALL                     = 0x4
-	F_ALLOCATECONTIG                  = 0x2
-	F_BARRIERFSYNC                    = 0x55
-	F_CHECK_LV                        = 0x62
-	F_CHKCLEAN                        = 0x29
-	F_DUPFD                           = 0x0
-	F_DUPFD_CLOEXEC                   = 0x43
-	F_FINDSIGS                        = 0x4e
-	F_FLUSH_DATA                      = 0x28
-	F_FREEZE_FS                       = 0x35
-	F_FULLFSYNC                       = 0x33
-	F_GETCODEDIR                      = 0x48
-	F_GETFD                           = 0x1
-	F_GETFL                           = 0x3
-	F_GETLK                           = 0x7
-	F_GETLKPID                        = 0x42
-	F_GETNOSIGPIPE                    = 0x4a
-	F_GETOWN                          = 0x5
-	F_GETPATH                         = 0x32
-	F_GETPATH_MTMINFO                 = 0x47
-	F_GETPROTECTIONCLASS              = 0x3f
-	F_GETPROTECTIONLEVEL              = 0x4d
-	F_GLOBAL_NOCACHE                  = 0x37
-	F_LOG2PHYS                        = 0x31
-	F_LOG2PHYS_EXT                    = 0x41
-	F_NOCACHE                         = 0x30
-	F_NODIRECT                        = 0x3e
-	F_OK                              = 0x0
-	F_PATHPKG_CHECK                   = 0x34
-	F_PEOFPOSMODE                     = 0x3
-	F_PREALLOCATE                     = 0x2a
-	F_PUNCHHOLE                       = 0x63
-	F_RDADVISE                        = 0x2c
-	F_RDAHEAD                         = 0x2d
-	F_RDLCK                           = 0x1
-	F_SETBACKINGSTORE                 = 0x46
-	F_SETFD                           = 0x2
-	F_SETFL                           = 0x4
-	F_SETLK                           = 0x8
-	F_SETLKW                          = 0x9
-	F_SETLKWTIMEOUT                   = 0xa
-	F_SETNOSIGPIPE                    = 0x49
-	F_SETOWN                          = 0x6
-	F_SETPROTECTIONCLASS              = 0x40
-	F_SETSIZE                         = 0x2b
-	F_SINGLE_WRITER                   = 0x4c
-	F_THAW_FS                         = 0x36
-	F_TRANSCODEKEY                    = 0x4b
-	F_TRIM_ACTIVE_FILE                = 0x64
-	F_UNLCK                           = 0x2
-	F_VOLPOSMODE                      = 0x4
-	F_WRLCK                           = 0x3
-	HUPCL                             = 0x4000
-	HW_MACHINE                        = 0x1
-	ICANON                            = 0x100
-	ICMP6_FILTER                      = 0x12
-	ICRNL                             = 0x100
-	IEXTEN                            = 0x400
-	IFF_ALLMULTI                      = 0x200
-	IFF_ALTPHYS                       = 0x4000
-	IFF_BROADCAST                     = 0x2
-	IFF_DEBUG                         = 0x4
-	IFF_LINK0                         = 0x1000
-	IFF_LINK1                         = 0x2000
-	IFF_LINK2                         = 0x4000
-	IFF_LOOPBACK                      = 0x8
-	IFF_MULTICAST                     = 0x8000
-	IFF_NOARP                         = 0x80
-	IFF_NOTRAILERS                    = 0x20
-	IFF_OACTIVE                       = 0x400
-	IFF_POINTOPOINT                   = 0x10
-	IFF_PROMISC                       = 0x100
-	IFF_RUNNING                       = 0x40
-	IFF_SIMPLEX                       = 0x800
-	IFF_UP                            = 0x1
-	IFNAMSIZ                          = 0x10
-	IFT_1822                          = 0x2
-	IFT_AAL5                          = 0x31
-	IFT_ARCNET                        = 0x23
-	IFT_ARCNETPLUS                    = 0x24
-	IFT_ATM                           = 0x25
-	IFT_BRIDGE                        = 0xd1
-	IFT_CARP                          = 0xf8
-	IFT_CELLULAR                      = 0xff
-	IFT_CEPT                          = 0x13
-	IFT_DS3                           = 0x1e
-	IFT_ENC                           = 0xf4
-	IFT_EON                           = 0x19
-	IFT_ETHER                         = 0x6
-	IFT_FAITH                         = 0x38
-	IFT_FDDI                          = 0xf
-	IFT_FRELAY                        = 0x20
-	IFT_FRELAYDCE                     = 0x2c
-	IFT_GIF                           = 0x37
-	IFT_HDH1822                       = 0x3
-	IFT_HIPPI                         = 0x2f
-	IFT_HSSI                          = 0x2e
-	IFT_HY                            = 0xe
-	IFT_IEEE1394                      = 0x90
-	IFT_IEEE8023ADLAG                 = 0x88
-	IFT_ISDNBASIC                     = 0x14
-	IFT_ISDNPRIMARY                   = 0x15
-	IFT_ISO88022LLC                   = 0x29
-	IFT_ISO88023                      = 0x7
-	IFT_ISO88024                      = 0x8
-	IFT_ISO88025                      = 0x9
-	IFT_ISO88026                      = 0xa
-	IFT_L2VLAN                        = 0x87
-	IFT_LAPB                          = 0x10
-	IFT_LOCALTALK                     = 0x2a
-	IFT_LOOP                          = 0x18
-	IFT_MIOX25                        = 0x26
-	IFT_MODEM                         = 0x30
-	IFT_NSIP                          = 0x1b
-	IFT_OTHER                         = 0x1
-	IFT_P10                           = 0xc
-	IFT_P80                           = 0xd
-	IFT_PARA                          = 0x22
-	IFT_PDP                           = 0xff
-	IFT_PFLOG                         = 0xf5
-	IFT_PFSYNC                        = 0xf6
-	IFT_PKTAP                         = 0xfe
-	IFT_PPP                           = 0x17
-	IFT_PROPMUX                       = 0x36
-	IFT_PROPVIRTUAL                   = 0x35
-	IFT_PTPSERIAL                     = 0x16
-	IFT_RS232                         = 0x21
-	IFT_SDLC                          = 0x11
-	IFT_SIP                           = 0x1f
-	IFT_SLIP                          = 0x1c
-	IFT_SMDSDXI                       = 0x2b
-	IFT_SMDSICIP                      = 0x34
-	IFT_SONET                         = 0x27
-	IFT_SONETPATH                     = 0x32
-	IFT_SONETVT                       = 0x33
-	IFT_STARLAN                       = 0xb
-	IFT_STF                           = 0x39
-	IFT_T1                            = 0x12
-	IFT_ULTRA                         = 0x1d
-	IFT_V35                           = 0x2d
-	IFT_X25                           = 0x5
-	IFT_X25DDN                        = 0x4
-	IFT_X25PLE                        = 0x28
-	IFT_XETHER                        = 0x1a
-	IGNBRK                            = 0x1
-	IGNCR                             = 0x80
-	IGNPAR                            = 0x4
-	IMAXBEL                           = 0x2000
-	INLCR                             = 0x40
-	INPCK                             = 0x10
-	IN_CLASSA_HOST                    = 0xffffff
-	IN_CLASSA_MAX                     = 0x80
-	IN_CLASSA_NET                     = 0xff000000
-	IN_CLASSA_NSHIFT                  = 0x18
-	IN_CLASSB_HOST                    = 0xffff
-	IN_CLASSB_MAX                     = 0x10000
-	IN_CLASSB_NET                     = 0xffff0000
-	IN_CLASSB_NSHIFT                  = 0x10
-	IN_CLASSC_HOST                    = 0xff
-	IN_CLASSC_NET                     = 0xffffff00
-	IN_CLASSC_NSHIFT                  = 0x8
-	IN_CLASSD_HOST                    = 0xfffffff
-	IN_CLASSD_NET                     = 0xf0000000
-	IN_CLASSD_NSHIFT                  = 0x1c
-	IN_LINKLOCALNETNUM                = 0xa9fe0000
-	IN_LOOPBACKNET                    = 0x7f
-	IPPROTO_3PC                       = 0x22
-	IPPROTO_ADFS                      = 0x44
-	IPPROTO_AH                        = 0x33
-	IPPROTO_AHIP                      = 0x3d
-	IPPROTO_APES                      = 0x63
-	IPPROTO_ARGUS                     = 0xd
-	IPPROTO_AX25                      = 0x5d
-	IPPROTO_BHA                       = 0x31
-	IPPROTO_BLT                       = 0x1e
-	IPPROTO_BRSATMON                  = 0x4c
-	IPPROTO_CFTP                      = 0x3e
-	IPPROTO_CHAOS                     = 0x10
-	IPPROTO_CMTP                      = 0x26
-	IPPROTO_CPHB                      = 0x49
-	IPPROTO_CPNX                      = 0x48
-	IPPROTO_DDP                       = 0x25
-	IPPROTO_DGP                       = 0x56
-	IPPROTO_DIVERT                    = 0xfe
-	IPPROTO_DONE                      = 0x101
-	IPPROTO_DSTOPTS                   = 0x3c
-	IPPROTO_EGP                       = 0x8
-	IPPROTO_EMCON                     = 0xe
-	IPPROTO_ENCAP                     = 0x62
-	IPPROTO_EON                       = 0x50
-	IPPROTO_ESP                       = 0x32
-	IPPROTO_ETHERIP                   = 0x61
-	IPPROTO_FRAGMENT                  = 0x2c
-	IPPROTO_GGP                       = 0x3
-	IPPROTO_GMTP                      = 0x64
-	IPPROTO_GRE                       = 0x2f
-	IPPROTO_HELLO                     = 0x3f
-	IPPROTO_HMP                       = 0x14
-	IPPROTO_HOPOPTS                   = 0x0
-	IPPROTO_ICMP                      = 0x1
-	IPPROTO_ICMPV6                    = 0x3a
-	IPPROTO_IDP                       = 0x16
-	IPPROTO_IDPR                      = 0x23
-	IPPROTO_IDRP                      = 0x2d
-	IPPROTO_IGMP                      = 0x2
-	IPPROTO_IGP                       = 0x55
-	IPPROTO_IGRP                      = 0x58
-	IPPROTO_IL                        = 0x28
-	IPPROTO_INLSP                     = 0x34
-	IPPROTO_INP                       = 0x20
-	IPPROTO_IP                        = 0x0
-	IPPROTO_IPCOMP                    = 0x6c
-	IPPROTO_IPCV                      = 0x47
-	IPPROTO_IPEIP                     = 0x5e
-	IPPROTO_IPIP                      = 0x4
-	IPPROTO_IPPC                      = 0x43
-	IPPROTO_IPV4                      = 0x4
-	IPPROTO_IPV6                      = 0x29
-	IPPROTO_IRTP                      = 0x1c
-	IPPROTO_KRYPTOLAN                 = 0x41
-	IPPROTO_LARP                      = 0x5b
-	IPPROTO_LEAF1                     = 0x19
-	IPPROTO_LEAF2                     = 0x1a
-	IPPROTO_MAX                       = 0x100
-	IPPROTO_MAXID                     = 0x34
-	IPPROTO_MEAS                      = 0x13
-	IPPROTO_MHRP                      = 0x30
-	IPPROTO_MICP                      = 0x5f
-	IPPROTO_MTP                       = 0x5c
-	IPPROTO_MUX                       = 0x12
-	IPPROTO_ND                        = 0x4d
-	IPPROTO_NHRP                      = 0x36
-	IPPROTO_NONE                      = 0x3b
-	IPPROTO_NSP                       = 0x1f
-	IPPROTO_NVPII                     = 0xb
-	IPPROTO_OSPFIGP                   = 0x59
-	IPPROTO_PGM                       = 0x71
-	IPPROTO_PIGP                      = 0x9
-	IPPROTO_PIM                       = 0x67
-	IPPROTO_PRM                       = 0x15
-	IPPROTO_PUP                       = 0xc
-	IPPROTO_PVP                       = 0x4b
-	IPPROTO_RAW                       = 0xff
-	IPPROTO_RCCMON                    = 0xa
-	IPPROTO_RDP                       = 0x1b
-	IPPROTO_ROUTING                   = 0x2b
-	IPPROTO_RSVP                      = 0x2e
-	IPPROTO_RVD                       = 0x42
-	IPPROTO_SATEXPAK                  = 0x40
-	IPPROTO_SATMON                    = 0x45
-	IPPROTO_SCCSP                     = 0x60
-	IPPROTO_SCTP                      = 0x84
-	IPPROTO_SDRP                      = 0x2a
-	IPPROTO_SEP                       = 0x21
-	IPPROTO_SRPC                      = 0x5a
-	IPPROTO_ST                        = 0x7
-	IPPROTO_SVMTP                     = 0x52
-	IPPROTO_SWIPE                     = 0x35
-	IPPROTO_TCF                       = 0x57
-	IPPROTO_TCP                       = 0x6
-	IPPROTO_TP                        = 0x1d
-	IPPROTO_TPXX                      = 0x27
-	IPPROTO_TRUNK1                    = 0x17
-	IPPROTO_TRUNK2                    = 0x18
-	IPPROTO_TTP                       = 0x54
-	IPPROTO_UDP                       = 0x11
-	IPPROTO_VINES                     = 0x53
-	IPPROTO_VISA                      = 0x46
-	IPPROTO_VMTP                      = 0x51
-	IPPROTO_WBEXPAK                   = 0x4f
-	IPPROTO_WBMON                     = 0x4e
-	IPPROTO_WSN                       = 0x4a
-	IPPROTO_XNET                      = 0xf
-	IPPROTO_XTP                       = 0x24
-	IPV6_2292DSTOPTS                  = 0x17
-	IPV6_2292HOPLIMIT                 = 0x14
-	IPV6_2292HOPOPTS                  = 0x16
-	IPV6_2292NEXTHOP                  = 0x15
-	IPV6_2292PKTINFO                  = 0x13
-	IPV6_2292PKTOPTIONS               = 0x19
-	IPV6_2292RTHDR                    = 0x18
-	IPV6_BINDV6ONLY                   = 0x1b
-	IPV6_BOUND_IF                     = 0x7d
-	IPV6_CHECKSUM                     = 0x1a
-	IPV6_DEFAULT_MULTICAST_HOPS       = 0x1
-	IPV6_DEFAULT_MULTICAST_LOOP       = 0x1
-	IPV6_DEFHLIM                      = 0x40
-	IPV6_FAITH                        = 0x1d
-	IPV6_FLOWINFO_MASK                = 0xffffff0f
-	IPV6_FLOWLABEL_MASK               = 0xffff0f00
-	IPV6_FLOW_ECN_MASK                = 0x300
-	IPV6_FRAGTTL                      = 0x3c
-	IPV6_FW_ADD                       = 0x1e
-	IPV6_FW_DEL                       = 0x1f
-	IPV6_FW_FLUSH                     = 0x20
-	IPV6_FW_GET                       = 0x22
-	IPV6_FW_ZERO                      = 0x21
-	IPV6_HLIMDEC                      = 0x1
-	IPV6_IPSEC_POLICY                 = 0x1c
-	IPV6_JOIN_GROUP                   = 0xc
-	IPV6_LEAVE_GROUP                  = 0xd
-	IPV6_MAXHLIM                      = 0xff
-	IPV6_MAXOPTHDR                    = 0x800
-	IPV6_MAXPACKET                    = 0xffff
-	IPV6_MAX_GROUP_SRC_FILTER         = 0x200
-	IPV6_MAX_MEMBERSHIPS              = 0xfff
-	IPV6_MAX_SOCK_SRC_FILTER          = 0x80
-	IPV6_MIN_MEMBERSHIPS              = 0x1f
-	IPV6_MMTU                         = 0x500
-	IPV6_MULTICAST_HOPS               = 0xa
-	IPV6_MULTICAST_IF                 = 0x9
-	IPV6_MULTICAST_LOOP               = 0xb
-	IPV6_PORTRANGE                    = 0xe
-	IPV6_PORTRANGE_DEFAULT            = 0x0
-	IPV6_PORTRANGE_HIGH               = 0x1
-	IPV6_PORTRANGE_LOW                = 0x2
-	IPV6_RECVTCLASS                   = 0x23
-	IPV6_RTHDR_LOOSE                  = 0x0
-	IPV6_RTHDR_STRICT                 = 0x1
-	IPV6_RTHDR_TYPE_0                 = 0x0
-	IPV6_SOCKOPT_RESERVED1            = 0x3
-	IPV6_TCLASS                       = 0x24
-	IPV6_UNICAST_HOPS                 = 0x4
-	IPV6_V6ONLY                       = 0x1b
-	IPV6_VERSION                      = 0x60
-	IPV6_VERSION_MASK                 = 0xf0
-	IP_ADD_MEMBERSHIP                 = 0xc
-	IP_ADD_SOURCE_MEMBERSHIP          = 0x46
-	IP_BLOCK_SOURCE                   = 0x48
-	IP_BOUND_IF                       = 0x19
-	IP_DEFAULT_MULTICAST_LOOP         = 0x1
-	IP_DEFAULT_MULTICAST_TTL          = 0x1
-	IP_DF                             = 0x4000
-	IP_DROP_MEMBERSHIP                = 0xd
-	IP_DROP_SOURCE_MEMBERSHIP         = 0x47
-	IP_DUMMYNET_CONFIGURE             = 0x3c
-	IP_DUMMYNET_DEL                   = 0x3d
-	IP_DUMMYNET_FLUSH                 = 0x3e
-	IP_DUMMYNET_GET                   = 0x40
-	IP_FAITH                          = 0x16
-	IP_FW_ADD                         = 0x28
-	IP_FW_DEL                         = 0x29
-	IP_FW_FLUSH                       = 0x2a
-	IP_FW_GET                         = 0x2c
-	IP_FW_RESETLOG                    = 0x2d
-	IP_FW_ZERO                        = 0x2b
-	IP_HDRINCL                        = 0x2
-	IP_IPSEC_POLICY                   = 0x15
-	IP_MAXPACKET                      = 0xffff
-	IP_MAX_GROUP_SRC_FILTER           = 0x200
-	IP_MAX_MEMBERSHIPS                = 0xfff
-	IP_MAX_SOCK_MUTE_FILTER           = 0x80
-	IP_MAX_SOCK_SRC_FILTER            = 0x80
-	IP_MF                             = 0x2000
-	IP_MIN_MEMBERSHIPS                = 0x1f
-	IP_MSFILTER                       = 0x4a
-	IP_MSS                            = 0x240
-	IP_MULTICAST_IF                   = 0x9
-	IP_MULTICAST_IFINDEX              = 0x42
-	IP_MULTICAST_LOOP                 = 0xb
-	IP_MULTICAST_TTL                  = 0xa
-	IP_MULTICAST_VIF                  = 0xe
-	IP_NAT__XXX                       = 0x37
-	IP_OFFMASK                        = 0x1fff
-	IP_OLD_FW_ADD                     = 0x32
-	IP_OLD_FW_DEL                     = 0x33
-	IP_OLD_FW_FLUSH                   = 0x34
-	IP_OLD_FW_GET                     = 0x36
-	IP_OLD_FW_RESETLOG                = 0x38
-	IP_OLD_FW_ZERO                    = 0x35
-	IP_OPTIONS                        = 0x1
-	IP_PKTINFO                        = 0x1a
-	IP_PORTRANGE                      = 0x13
-	IP_PORTRANGE_DEFAULT              = 0x0
-	IP_PORTRANGE_HIGH                 = 0x1
-	IP_PORTRANGE_LOW                  = 0x2
-	IP_RECVDSTADDR                    = 0x7
-	IP_RECVIF                         = 0x14
-	IP_RECVOPTS                       = 0x5
-	IP_RECVPKTINFO                    = 0x1a
-	IP_RECVRETOPTS                    = 0x6
-	IP_RECVTOS                        = 0x1b
-	IP_RECVTTL                        = 0x18
-	IP_RETOPTS                        = 0x8
-	IP_RF                             = 0x8000
-	IP_RSVP_OFF                       = 0x10
-	IP_RSVP_ON                        = 0xf
-	IP_RSVP_VIF_OFF                   = 0x12
-	IP_RSVP_VIF_ON                    = 0x11
-	IP_STRIPHDR                       = 0x17
-	IP_TOS                            = 0x3
-	IP_TRAFFIC_MGT_BACKGROUND         = 0x41
-	IP_TTL                            = 0x4
-	IP_UNBLOCK_SOURCE                 = 0x49
-	ISIG                              = 0x80
-	ISTRIP                            = 0x20
-	IUTF8                             = 0x4000
-	IXANY                             = 0x800
-	IXOFF                             = 0x400
-	IXON                              = 0x200
-	KERN_HOSTNAME                     = 0xa
-	KERN_OSRELEASE                    = 0x2
-	KERN_OSTYPE                       = 0x1
-	KERN_VERSION                      = 0x4
-	LOCK_EX                           = 0x2
-	LOCK_NB                           = 0x4
-	LOCK_SH                           = 0x1
-	LOCK_UN                           = 0x8
-	MADV_CAN_REUSE                    = 0x9
-	MADV_DONTNEED                     = 0x4
-	MADV_FREE                         = 0x5
-	MADV_FREE_REUSABLE                = 0x7
-	MADV_FREE_REUSE                   = 0x8
-	MADV_NORMAL                       = 0x0
-	MADV_PAGEOUT                      = 0xa
-	MADV_RANDOM                       = 0x1
-	MADV_SEQUENTIAL                   = 0x2
-	MADV_WILLNEED                     = 0x3
-	MADV_ZERO_WIRED_PAGES             = 0x6
-	MAP_ANON                          = 0x1000
-	MAP_ANONYMOUS                     = 0x1000
-	MAP_COPY                          = 0x2
-	MAP_FILE                          = 0x0
-	MAP_FIXED                         = 0x10
-	MAP_HASSEMAPHORE                  = 0x200
-	MAP_JIT                           = 0x800
-	MAP_NOCACHE                       = 0x400
-	MAP_NOEXTEND                      = 0x100
-	MAP_NORESERVE                     = 0x40
-	MAP_PRIVATE                       = 0x2
-	MAP_RENAME                        = 0x20
-	MAP_RESERVED0080                  = 0x80
-	MAP_RESILIENT_CODESIGN            = 0x2000
-	MAP_RESILIENT_MEDIA               = 0x4000
-	MAP_SHARED                        = 0x1
-	MCL_CURRENT                       = 0x1
-	MCL_FUTURE                        = 0x2
-	MNT_ASYNC                         = 0x40
-	MNT_AUTOMOUNTED                   = 0x400000
-	MNT_CMDFLAGS                      = 0xf0000
-	MNT_CPROTECT                      = 0x80
-	MNT_DEFWRITE                      = 0x2000000
-	MNT_DONTBROWSE                    = 0x100000
-	MNT_DOVOLFS                       = 0x8000
-	MNT_DWAIT                         = 0x4
-	MNT_EXPORTED                      = 0x100
-	MNT_FORCE                         = 0x80000
-	MNT_IGNORE_OWNERSHIP              = 0x200000
-	MNT_JOURNALED                     = 0x800000
-	MNT_LOCAL                         = 0x1000
-	MNT_MULTILABEL                    = 0x4000000
-	MNT_NOATIME                       = 0x10000000
-	MNT_NOBLOCK                       = 0x20000
-	MNT_NODEV                         = 0x10
-	MNT_NOEXEC                        = 0x4
-	MNT_NOSUID                        = 0x8
-	MNT_NOUSERXATTR                   = 0x1000000
-	MNT_NOWAIT                        = 0x2
-	MNT_QUARANTINE                    = 0x400
-	MNT_QUOTA                         = 0x2000
-	MNT_RDONLY                        = 0x1
-	MNT_RELOAD                        = 0x40000
-	MNT_ROOTFS                        = 0x4000
-	MNT_SYNCHRONOUS                   = 0x2
-	MNT_UNION                         = 0x20
-	MNT_UNKNOWNPERMISSIONS            = 0x200000
-	MNT_UPDATE                        = 0x10000
-	MNT_VISFLAGMASK                   = 0x17f0f5ff
-	MNT_WAIT                          = 0x1
-	MSG_CTRUNC                        = 0x20
-	MSG_DONTROUTE                     = 0x4
-	MSG_DONTWAIT                      = 0x80
-	MSG_EOF                           = 0x100
-	MSG_EOR                           = 0x8
-	MSG_FLUSH                         = 0x400
-	MSG_HAVEMORE                      = 0x2000
-	MSG_HOLD                          = 0x800
-	MSG_NEEDSA                        = 0x10000
-	MSG_OOB                           = 0x1
-	MSG_PEEK                          = 0x2
-	MSG_RCVMORE                       = 0x4000
-	MSG_SEND                          = 0x1000
-	MSG_TRUNC                         = 0x10
-	MSG_WAITALL                       = 0x40
-	MSG_WAITSTREAM                    = 0x200
-	MS_ASYNC                          = 0x1
-	MS_DEACTIVATE                     = 0x8
-	MS_INVALIDATE                     = 0x2
-	MS_KILLPAGES                      = 0x4
-	MS_SYNC                           = 0x10
-	NAME_MAX                          = 0xff
-	NET_RT_DUMP                       = 0x1
-	NET_RT_DUMP2                      = 0x7
-	NET_RT_FLAGS                      = 0x2
-	NET_RT_IFLIST                     = 0x3
-	NET_RT_IFLIST2                    = 0x6
-	NET_RT_MAXID                      = 0xa
-	NET_RT_STAT                       = 0x4
-	NET_RT_TRASH                      = 0x5
-	NFDBITS                           = 0x20
-	NL0                               = 0x0
-	NL1                               = 0x100
-	NL2                               = 0x200
-	NL3                               = 0x300
-	NLDLY                             = 0x300
-	NOFLSH                            = 0x80000000
-	NOKERNINFO                        = 0x2000000
-	NOTE_ABSOLUTE                     = 0x8
-	NOTE_ATTRIB                       = 0x8
-	NOTE_BACKGROUND                   = 0x40
-	NOTE_CHILD                        = 0x4
-	NOTE_CRITICAL                     = 0x20
-	NOTE_DELETE                       = 0x1
-	NOTE_EXEC                         = 0x20000000
-	NOTE_EXIT                         = 0x80000000
-	NOTE_EXITSTATUS                   = 0x4000000
-	NOTE_EXIT_CSERROR                 = 0x40000
-	NOTE_EXIT_DECRYPTFAIL             = 0x10000
-	NOTE_EXIT_DETAIL                  = 0x2000000
-	NOTE_EXIT_DETAIL_MASK             = 0x70000
-	NOTE_EXIT_MEMORY                  = 0x20000
-	NOTE_EXIT_REPARENTED              = 0x80000
-	NOTE_EXTEND                       = 0x4
-	NOTE_FFAND                        = 0x40000000
-	NOTE_FFCOPY                       = 0xc0000000
-	NOTE_FFCTRLMASK                   = 0xc0000000
-	NOTE_FFLAGSMASK                   = 0xffffff
-	NOTE_FFNOP                        = 0x0
-	NOTE_FFOR                         = 0x80000000
-	NOTE_FORK                         = 0x40000000
-	NOTE_FUNLOCK                      = 0x100
-	NOTE_LEEWAY                       = 0x10
-	NOTE_LINK                         = 0x10
-	NOTE_LOWAT                        = 0x1
-	NOTE_MACH_CONTINUOUS_TIME         = 0x80
-	NOTE_NONE                         = 0x80
-	NOTE_NSECONDS                     = 0x4
-	NOTE_OOB                          = 0x2
-	NOTE_PCTRLMASK                    = -0x100000
-	NOTE_PDATAMASK                    = 0xfffff
-	NOTE_REAP                         = 0x10000000
-	NOTE_RENAME                       = 0x20
-	NOTE_REVOKE                       = 0x40
-	NOTE_SECONDS                      = 0x1
-	NOTE_SIGNAL                       = 0x8000000
-	NOTE_TRACK                        = 0x1
-	NOTE_TRACKERR                     = 0x2
-	NOTE_TRIGGER                      = 0x1000000
-	NOTE_USECONDS                     = 0x2
-	NOTE_VM_ERROR                     = 0x10000000
-	NOTE_VM_PRESSURE                  = 0x80000000
-	NOTE_VM_PRESSURE_SUDDEN_TERMINATE = 0x20000000
-	NOTE_VM_PRESSURE_TERMINATE        = 0x40000000
-	NOTE_WRITE                        = 0x2
-	OCRNL                             = 0x10
-	OFDEL                             = 0x20000
-	OFILL                             = 0x80
-	ONLCR                             = 0x2
-	ONLRET                            = 0x40
-	ONOCR                             = 0x20
-	ONOEOT                            = 0x8
-	OPOST                             = 0x1
-	OXTABS                            = 0x4
-	O_ACCMODE                         = 0x3
-	O_ALERT                           = 0x20000000
-	O_APPEND                          = 0x8
-	O_ASYNC                           = 0x40
-	O_CLOEXEC                         = 0x1000000
-	O_CREAT                           = 0x200
-	O_DIRECTORY                       = 0x100000
-	O_DP_GETRAWENCRYPTED              = 0x1
-	O_DP_GETRAWUNENCRYPTED            = 0x2
-	O_DSYNC                           = 0x400000
-	O_EVTONLY                         = 0x8000
-	O_EXCL                            = 0x800
-	O_EXLOCK                          = 0x20
-	O_FSYNC                           = 0x80
-	O_NDELAY                          = 0x4
-	O_NOCTTY                          = 0x20000
-	O_NOFOLLOW                        = 0x100
-	O_NONBLOCK                        = 0x4
-	O_POPUP                           = 0x80000000
-	O_RDONLY                          = 0x0
-	O_RDWR                            = 0x2
-	O_SHLOCK                          = 0x10
-	O_SYMLINK                         = 0x200000
-	O_SYNC                            = 0x80
-	O_TRUNC                           = 0x400
-	O_WRONLY                          = 0x1
-	PARENB                            = 0x1000
-	PARMRK                            = 0x8
-	PARODD                            = 0x2000
-	PENDIN                            = 0x20000000
-	PRIO_PGRP                         = 0x1
-	PRIO_PROCESS                      = 0x0
-	PRIO_USER                         = 0x2
-	PROT_EXEC                         = 0x4
-	PROT_NONE                         = 0x0
-	PROT_READ                         = 0x1
-	PROT_WRITE                        = 0x2
-	PT_ATTACH                         = 0xa
-	PT_ATTACHEXC                      = 0xe
-	PT_CONTINUE                       = 0x7
-	PT_DENY_ATTACH                    = 0x1f
-	PT_DETACH                         = 0xb
-	PT_FIRSTMACH                      = 0x20
-	PT_FORCEQUOTA                     = 0x1e
-	PT_KILL                           = 0x8
-	PT_READ_D                         = 0x2
-	PT_READ_I                         = 0x1
-	PT_READ_U                         = 0x3
-	PT_SIGEXC                         = 0xc
-	PT_STEP                           = 0x9
-	PT_THUPDATE                       = 0xd
-	PT_TRACE_ME                       = 0x0
-	PT_WRITE_D                        = 0x5
-	PT_WRITE_I                        = 0x4
-	PT_WRITE_U                        = 0x6
-	RLIMIT_AS                         = 0x5
-	RLIMIT_CORE                       = 0x4
-	RLIMIT_CPU                        = 0x0
-	RLIMIT_CPU_USAGE_MONITOR          = 0x2
-	RLIMIT_DATA                       = 0x2
-	RLIMIT_FSIZE                      = 0x1
-	RLIMIT_MEMLOCK                    = 0x6
-	RLIMIT_NOFILE                     = 0x8
-	RLIMIT_NPROC                      = 0x7
-	RLIMIT_RSS                        = 0x5
-	RLIMIT_STACK                      = 0x3
-	RLIM_INFINITY                     = 0x7fffffffffffffff
-	RTAX_AUTHOR                       = 0x6
-	RTAX_BRD                          = 0x7
-	RTAX_DST                          = 0x0
-	RTAX_GATEWAY                      = 0x1
-	RTAX_GENMASK                      = 0x3
-	RTAX_IFA                          = 0x5
-	RTAX_IFP                          = 0x4
-	RTAX_MAX                          = 0x8
-	RTAX_NETMASK                      = 0x2
-	RTA_AUTHOR                        = 0x40
-	RTA_BRD                           = 0x80
-	RTA_DST                           = 0x1
-	RTA_GATEWAY                       = 0x2
-	RTA_GENMASK                       = 0x8
-	RTA_IFA                           = 0x20
-	RTA_IFP                           = 0x10
-	RTA_NETMASK                       = 0x4
-	RTF_BLACKHOLE                     = 0x1000
-	RTF_BROADCAST                     = 0x400000
-	RTF_CLONING                       = 0x100
-	RTF_CONDEMNED                     = 0x2000000
-	RTF_DELCLONE                      = 0x80
-	RTF_DONE                          = 0x40
-	RTF_DYNAMIC                       = 0x10
-	RTF_GATEWAY                       = 0x2
-	RTF_HOST                          = 0x4
-	RTF_IFREF                         = 0x4000000
-	RTF_IFSCOPE                       = 0x1000000
-	RTF_LLINFO                        = 0x400
-	RTF_LOCAL                         = 0x200000
-	RTF_MODIFIED                      = 0x20
-	RTF_MULTICAST                     = 0x800000
-	RTF_NOIFREF                       = 0x2000
-	RTF_PINNED                        = 0x100000
-	RTF_PRCLONING                     = 0x10000
-	RTF_PROTO1                        = 0x8000
-	RTF_PROTO2                        = 0x4000
-	RTF_PROTO3                        = 0x40000
-	RTF_PROXY                         = 0x8000000
-	RTF_REJECT                        = 0x8
-	RTF_ROUTER                        = 0x10000000
-	RTF_STATIC                        = 0x800
-	RTF_UP                            = 0x1
-	RTF_WASCLONED                     = 0x20000
-	RTF_XRESOLVE                      = 0x200
-	RTM_ADD                           = 0x1
-	RTM_CHANGE                        = 0x3
-	RTM_DELADDR                       = 0xd
-	RTM_DELETE                        = 0x2
-	RTM_DELMADDR                      = 0x10
-	RTM_GET                           = 0x4
-	RTM_GET2                          = 0x14
-	RTM_IFINFO                        = 0xe
-	RTM_IFINFO2                       = 0x12
-	RTM_LOCK                          = 0x8
-	RTM_LOSING                        = 0x5
-	RTM_MISS                          = 0x7
-	RTM_NEWADDR                       = 0xc
-	RTM_NEWMADDR                      = 0xf
-	RTM_NEWMADDR2                     = 0x13
-	RTM_OLDADD                        = 0x9
-	RTM_OLDDEL                        = 0xa
-	RTM_REDIRECT                      = 0x6
-	RTM_RESOLVE                       = 0xb
-	RTM_RTTUNIT                       = 0xf4240
-	RTM_VERSION                       = 0x5
-	RTV_EXPIRE                        = 0x4
-	RTV_HOPCOUNT                      = 0x2
-	RTV_MTU                           = 0x1
-	RTV_RPIPE                         = 0x8
-	RTV_RTT                           = 0x40
-	RTV_RTTVAR                        = 0x80
-	RTV_SPIPE                         = 0x10
-	RTV_SSTHRESH                      = 0x20
-	RUSAGE_CHILDREN                   = -0x1
-	RUSAGE_SELF                       = 0x0
-	SCM_CREDS                         = 0x3
-	SCM_RIGHTS                        = 0x1
-	SCM_TIMESTAMP                     = 0x2
-	SCM_TIMESTAMP_MONOTONIC           = 0x4
-	SHUT_RD                           = 0x0
-	SHUT_RDWR                         = 0x2
-	SHUT_WR                           = 0x1
-	SIOCADDMULTI                      = 0x80206931
-	SIOCAIFADDR                       = 0x8040691a
-	SIOCARPIPLL                       = 0xc0206928
-	SIOCATMARK                        = 0x40047307
-	SIOCAUTOADDR                      = 0xc0206926
-	SIOCAUTONETMASK                   = 0x80206927
-	SIOCDELMULTI                      = 0x80206932
-	SIOCDIFADDR                       = 0x80206919
-	SIOCDIFPHYADDR                    = 0x80206941
-	SIOCGDRVSPEC                      = 0xc01c697b
-	SIOCGETVLAN                       = 0xc020697f
-	SIOCGHIWAT                        = 0x40047301
-	SIOCGIFADDR                       = 0xc0206921
-	SIOCGIFALTMTU                     = 0xc0206948
-	SIOCGIFASYNCMAP                   = 0xc020697c
-	SIOCGIFBOND                       = 0xc0206947
-	SIOCGIFBRDADDR                    = 0xc0206923
-	SIOCGIFCAP                        = 0xc020695b
-	SIOCGIFCONF                       = 0xc0086924
-	SIOCGIFDEVMTU                     = 0xc0206944
-	SIOCGIFDSTADDR                    = 0xc0206922
-	SIOCGIFFLAGS                      = 0xc0206911
-	SIOCGIFGENERIC                    = 0xc020693a
-	SIOCGIFKPI                        = 0xc0206987
-	SIOCGIFMAC                        = 0xc0206982
-	SIOCGIFMEDIA                      = 0xc0286938
-	SIOCGIFMETRIC                     = 0xc0206917
-	SIOCGIFMTU                        = 0xc0206933
-	SIOCGIFNETMASK                    = 0xc0206925
-	SIOCGIFPDSTADDR                   = 0xc0206940
-	SIOCGIFPHYS                       = 0xc0206935
-	SIOCGIFPSRCADDR                   = 0xc020693f
-	SIOCGIFSTATUS                     = 0xc331693d
-	SIOCGIFVLAN                       = 0xc020697f
-	SIOCGIFWAKEFLAGS                  = 0xc0206988
-	SIOCGLOWAT                        = 0x40047303
-	SIOCGPGRP                         = 0x40047309
-	SIOCIFCREATE                      = 0xc0206978
-	SIOCIFCREATE2                     = 0xc020697a
-	SIOCIFDESTROY                     = 0x80206979
-	SIOCIFGCLONERS                    = 0xc00c6981
-	SIOCRSLVMULTI                     = 0xc008693b
-	SIOCSDRVSPEC                      = 0x801c697b
-	SIOCSETVLAN                       = 0x8020697e
-	SIOCSHIWAT                        = 0x80047300
-	SIOCSIFADDR                       = 0x8020690c
-	SIOCSIFALTMTU                     = 0x80206945
-	SIOCSIFASYNCMAP                   = 0x8020697d
-	SIOCSIFBOND                       = 0x80206946
-	SIOCSIFBRDADDR                    = 0x80206913
-	SIOCSIFCAP                        = 0x8020695a
-	SIOCSIFDSTADDR                    = 0x8020690e
-	SIOCSIFFLAGS                      = 0x80206910
-	SIOCSIFGENERIC                    = 0x80206939
-	SIOCSIFKPI                        = 0x80206986
-	SIOCSIFLLADDR                     = 0x8020693c
-	SIOCSIFMAC                        = 0x80206983
-	SIOCSIFMEDIA                      = 0xc0206937
-	SIOCSIFMETRIC                     = 0x80206918
-	SIOCSIFMTU                        = 0x80206934
-	SIOCSIFNETMASK                    = 0x80206916
-	SIOCSIFPHYADDR                    = 0x8040693e
-	SIOCSIFPHYS                       = 0x80206936
-	SIOCSIFVLAN                       = 0x8020697e
-	SIOCSLOWAT                        = 0x80047302
-	SIOCSPGRP                         = 0x80047308
-	SOCK_DGRAM                        = 0x2
-	SOCK_MAXADDRLEN                   = 0xff
-	SOCK_RAW                          = 0x3
-	SOCK_RDM                          = 0x4
-	SOCK_SEQPACKET                    = 0x5
-	SOCK_STREAM                       = 0x1
-	SOL_SOCKET                        = 0xffff
-	SOMAXCONN                         = 0x80
-	SO_ACCEPTCONN                     = 0x2
-	SO_BROADCAST                      = 0x20
-	SO_DEBUG                          = 0x1
-	SO_DONTROUTE                      = 0x10
-	SO_DONTTRUNC                      = 0x2000
-	SO_ERROR                          = 0x1007
-	SO_KEEPALIVE                      = 0x8
-	SO_LABEL                          = 0x1010
-	SO_LINGER                         = 0x80
-	SO_LINGER_SEC                     = 0x1080
-	SO_NETSVC_MARKING_LEVEL           = 0x1119
-	SO_NET_SERVICE_TYPE               = 0x1116
-	SO_NKE                            = 0x1021
-	SO_NOADDRERR                      = 0x1023
-	SO_NOSIGPIPE                      = 0x1022
-	SO_NOTIFYCONFLICT                 = 0x1026
-	SO_NP_EXTENSIONS                  = 0x1083
-	SO_NREAD                          = 0x1020
-	SO_NUMRCVPKT                      = 0x1112
-	SO_NWRITE                         = 0x1024
-	SO_OOBINLINE                      = 0x100
-	SO_PEERLABEL                      = 0x1011
-	SO_RANDOMPORT                     = 0x1082
-	SO_RCVBUF                         = 0x1002
-	SO_RCVLOWAT                       = 0x1004
-	SO_RCVTIMEO                       = 0x1006
-	SO_REUSEADDR                      = 0x4
-	SO_REUSEPORT                      = 0x200
-	SO_REUSESHAREUID                  = 0x1025
-	SO_SNDBUF                         = 0x1001
-	SO_SNDLOWAT                       = 0x1003
-	SO_SNDTIMEO                       = 0x1005
-	SO_TIMESTAMP                      = 0x400
-	SO_TIMESTAMP_MONOTONIC            = 0x800
-	SO_TYPE                           = 0x1008
-	SO_UPCALLCLOSEWAIT                = 0x1027
-	SO_USELOOPBACK                    = 0x40
-	SO_WANTMORE                       = 0x4000
-	SO_WANTOOBFLAG                    = 0x8000
-	S_IEXEC                           = 0x40
-	S_IFBLK                           = 0x6000
-	S_IFCHR                           = 0x2000
-	S_IFDIR                           = 0x4000
-	S_IFIFO                           = 0x1000
-	S_IFLNK                           = 0xa000
-	S_IFMT                            = 0xf000
-	S_IFREG                           = 0x8000
-	S_IFSOCK                          = 0xc000
-	S_IFWHT                           = 0xe000
-	S_IREAD                           = 0x100
-	S_IRGRP                           = 0x20
-	S_IROTH                           = 0x4
-	S_IRUSR                           = 0x100
-	S_IRWXG                           = 0x38
-	S_IRWXO                           = 0x7
-	S_IRWXU                           = 0x1c0
-	S_ISGID                           = 0x400
-	S_ISTXT                           = 0x200
-	S_ISUID                           = 0x800
-	S_ISVTX                           = 0x200
-	S_IWGRP                           = 0x10
-	S_IWOTH                           = 0x2
-	S_IWRITE                          = 0x80
-	S_IWUSR                           = 0x80
-	S_IXGRP                           = 0x8
-	S_IXOTH                           = 0x1
-	S_IXUSR                           = 0x40
-	TAB0                              = 0x0
-	TAB1                              = 0x400
-	TAB2                              = 0x800
-	TAB3                              = 0x4
-	TABDLY                            = 0xc04
-	TCIFLUSH                          = 0x1
-	TCIOFF                            = 0x3
-	TCIOFLUSH                         = 0x3
-	TCION                             = 0x4
-	TCOFLUSH                          = 0x2
-	TCOOFF                            = 0x1
-	TCOON                             = 0x2
-	TCP_CONNECTIONTIMEOUT             = 0x20
-	TCP_CONNECTION_INFO               = 0x106
-	TCP_ENABLE_ECN                    = 0x104
-	TCP_FASTOPEN                      = 0x105
-	TCP_KEEPALIVE                     = 0x10
-	TCP_KEEPCNT                       = 0x102
-	TCP_KEEPINTVL                     = 0x101
-	TCP_MAXHLEN                       = 0x3c
-	TCP_MAXOLEN                       = 0x28
-	TCP_MAXSEG                        = 0x2
-	TCP_MAXWIN                        = 0xffff
-	TCP_MAX_SACK                      = 0x4
-	TCP_MAX_WINSHIFT                  = 0xe
-	TCP_MINMSS                        = 0xd8
-	TCP_MSS                           = 0x200
-	TCP_NODELAY                       = 0x1
-	TCP_NOOPT                         = 0x8
-	TCP_NOPUSH                        = 0x4
-	TCP_NOTSENT_LOWAT                 = 0x201
-	TCP_RXT_CONNDROPTIME              = 0x80
-	TCP_RXT_FINDROP                   = 0x100
-	TCP_SENDMOREACKS                  = 0x103
-	TCSAFLUSH                         = 0x2
-	TIOCCBRK                          = 0x2000747a
-	TIOCCDTR                          = 0x20007478
-	TIOCCONS                          = 0x80047462
-	TIOCDCDTIMESTAMP                  = 0x40087458
-	TIOCDRAIN                         = 0x2000745e
-	TIOCDSIMICROCODE                  = 0x20007455
-	TIOCEXCL                          = 0x2000740d
-	TIOCEXT                           = 0x80047460
-	TIOCFLUSH                         = 0x80047410
-	TIOCGDRAINWAIT                    = 0x40047456
-	TIOCGETA                          = 0x402c7413
-	TIOCGETD                          = 0x4004741a
-	TIOCGPGRP                         = 0x40047477
-	TIOCGWINSZ                        = 0x40087468
-	TIOCIXOFF                         = 0x20007480
-	TIOCIXON                          = 0x20007481
-	TIOCMBIC                          = 0x8004746b
-	TIOCMBIS                          = 0x8004746c
-	TIOCMGDTRWAIT                     = 0x4004745a
-	TIOCMGET                          = 0x4004746a
-	TIOCMODG                          = 0x40047403
-	TIOCMODS                          = 0x80047404
-	TIOCMSDTRWAIT                     = 0x8004745b
-	TIOCMSET                          = 0x8004746d
-	TIOCM_CAR                         = 0x40
-	TIOCM_CD                          = 0x40
-	TIOCM_CTS                         = 0x20
-	TIOCM_DSR                         = 0x100
-	TIOCM_DTR                         = 0x2
-	TIOCM_LE                          = 0x1
-	TIOCM_RI                          = 0x80
-	TIOCM_RNG                         = 0x80
-	TIOCM_RTS                         = 0x4
-	TIOCM_SR                          = 0x10
-	TIOCM_ST                          = 0x8
-	TIOCNOTTY                         = 0x20007471
-	TIOCNXCL                          = 0x2000740e
-	TIOCOUTQ                          = 0x40047473
-	TIOCPKT                           = 0x80047470
-	TIOCPKT_DATA                      = 0x0
-	TIOCPKT_DOSTOP                    = 0x20
-	TIOCPKT_FLUSHREAD                 = 0x1
-	TIOCPKT_FLUSHWRITE                = 0x2
-	TIOCPKT_IOCTL                     = 0x40
-	TIOCPKT_NOSTOP                    = 0x10
-	TIOCPKT_START                     = 0x8
-	TIOCPKT_STOP                      = 0x4
-	TIOCPTYGNAME                      = 0x40807453
-	TIOCPTYGRANT                      = 0x20007454
-	TIOCPTYUNLK                       = 0x20007452
-	TIOCREMOTE                        = 0x80047469
-	TIOCSBRK                          = 0x2000747b
-	TIOCSCONS                         = 0x20007463
-	TIOCSCTTY                         = 0x20007461
-	TIOCSDRAINWAIT                    = 0x80047457
-	TIOCSDTR                          = 0x20007479
-	TIOCSETA                          = 0x802c7414
-	TIOCSETAF                         = 0x802c7416
-	TIOCSETAW                         = 0x802c7415
-	TIOCSETD                          = 0x8004741b
-	TIOCSIG                           = 0x2000745f
-	TIOCSPGRP                         = 0x80047476
-	TIOCSTART                         = 0x2000746e
-	TIOCSTAT                          = 0x20007465
-	TIOCSTI                           = 0x80017472
-	TIOCSTOP                          = 0x2000746f
-	TIOCSWINSZ                        = 0x80087467
-	TIOCTIMESTAMP                     = 0x40087459
-	TIOCUCNTL                         = 0x80047466
-	TOSTOP                            = 0x400000
-	VDISCARD                          = 0xf
-	VDSUSP                            = 0xb
-	VEOF                              = 0x0
-	VEOL                              = 0x1
-	VEOL2                             = 0x2
-	VERASE                            = 0x3
-	VINTR                             = 0x8
-	VKILL                             = 0x5
-	VLNEXT                            = 0xe
-	VMIN                              = 0x10
-	VM_LOADAVG                        = 0x2
-	VM_MACHFACTOR                     = 0x4
-	VM_MAXID                          = 0x6
-	VM_METER                          = 0x1
-	VM_SWAPUSAGE                      = 0x5
-	VQUIT                             = 0x9
-	VREPRINT                          = 0x6
-	VSTART                            = 0xc
-	VSTATUS                           = 0x12
-	VSTOP                             = 0xd
-	VSUSP                             = 0xa
-	VT0                               = 0x0
-	VT1                               = 0x10000
-	VTDLY                             = 0x10000
-	VTIME                             = 0x11
-	VWERASE                           = 0x4
-	WCONTINUED                        = 0x10
-	WCOREFLAG                         = 0x80
-	WEXITED                           = 0x4
-	WNOHANG                           = 0x1
-	WNOWAIT                           = 0x20
-	WORDSIZE                          = 0x20
-	WSTOPPED                          = 0x8
-	WUNTRACED                         = 0x2
-	XATTR_CREATE                      = 0x2
-	XATTR_NODEFAULT                   = 0x10
-	XATTR_NOFOLLOW                    = 0x1
-	XATTR_NOSECURITY                  = 0x8
-	XATTR_REPLACE                     = 0x4
-	XATTR_SHOWCOMPRESSION             = 0x20
-)
-
-// Errors
-const (
-	E2BIG           = syscall.Errno(0x7)
-	EACCES          = syscall.Errno(0xd)
-	EADDRINUSE      = syscall.Errno(0x30)
-	EADDRNOTAVAIL   = syscall.Errno(0x31)
-	EAFNOSUPPORT    = syscall.Errno(0x2f)
-	EAGAIN          = syscall.Errno(0x23)
-	EALREADY        = syscall.Errno(0x25)
-	EAUTH           = syscall.Errno(0x50)
-	EBADARCH        = syscall.Errno(0x56)
-	EBADEXEC        = syscall.Errno(0x55)
-	EBADF           = syscall.Errno(0x9)
-	EBADMACHO       = syscall.Errno(0x58)
-	EBADMSG         = syscall.Errno(0x5e)
-	EBADRPC         = syscall.Errno(0x48)
-	EBUSY           = syscall.Errno(0x10)
-	ECANCELED       = syscall.Errno(0x59)
-	ECHILD          = syscall.Errno(0xa)
-	ECONNABORTED    = syscall.Errno(0x35)
-	ECONNREFUSED    = syscall.Errno(0x3d)
-	ECONNRESET      = syscall.Errno(0x36)
-	EDEADLK         = syscall.Errno(0xb)
-	EDESTADDRREQ    = syscall.Errno(0x27)
-	EDEVERR         = syscall.Errno(0x53)
-	EDOM            = syscall.Errno(0x21)
-	EDQUOT          = syscall.Errno(0x45)
-	EEXIST          = syscall.Errno(0x11)
-	EFAULT          = syscall.Errno(0xe)
-	EFBIG           = syscall.Errno(0x1b)
-	EFTYPE          = syscall.Errno(0x4f)
-	EHOSTDOWN       = syscall.Errno(0x40)
-	EHOSTUNREACH    = syscall.Errno(0x41)
-	EIDRM           = syscall.Errno(0x5a)
-	EILSEQ          = syscall.Errno(0x5c)
-	EINPROGRESS     = syscall.Errno(0x24)
-	EINTR           = syscall.Errno(0x4)
-	EINVAL          = syscall.Errno(0x16)
-	EIO             = syscall.Errno(0x5)
-	EISCONN         = syscall.Errno(0x38)
-	EISDIR          = syscall.Errno(0x15)
-	ELAST           = syscall.Errno(0x6a)
-	ELOOP           = syscall.Errno(0x3e)
-	EMFILE          = syscall.Errno(0x18)
-	EMLINK          = syscall.Errno(0x1f)
-	EMSGSIZE        = syscall.Errno(0x28)
-	EMULTIHOP       = syscall.Errno(0x5f)
-	ENAMETOOLONG    = syscall.Errno(0x3f)
-	ENEEDAUTH       = syscall.Errno(0x51)
-	ENETDOWN        = syscall.Errno(0x32)
-	ENETRESET       = syscall.Errno(0x34)
-	ENETUNREACH     = syscall.Errno(0x33)
-	ENFILE          = syscall.Errno(0x17)
-	ENOATTR         = syscall.Errno(0x5d)
-	ENOBUFS         = syscall.Errno(0x37)
-	ENODATA         = syscall.Errno(0x60)
-	ENODEV          = syscall.Errno(0x13)
-	ENOENT          = syscall.Errno(0x2)
-	ENOEXEC         = syscall.Errno(0x8)
-	ENOLCK          = syscall.Errno(0x4d)
-	ENOLINK         = syscall.Errno(0x61)
-	ENOMEM          = syscall.Errno(0xc)
-	ENOMSG          = syscall.Errno(0x5b)
-	ENOPOLICY       = syscall.Errno(0x67)
-	ENOPROTOOPT     = syscall.Errno(0x2a)
-	ENOSPC          = syscall.Errno(0x1c)
-	ENOSR           = syscall.Errno(0x62)
-	ENOSTR          = syscall.Errno(0x63)
-	ENOSYS          = syscall.Errno(0x4e)
-	ENOTBLK         = syscall.Errno(0xf)
-	ENOTCONN        = syscall.Errno(0x39)
-	ENOTDIR         = syscall.Errno(0x14)
-	ENOTEMPTY       = syscall.Errno(0x42)
-	ENOTRECOVERABLE = syscall.Errno(0x68)
-	ENOTSOCK        = syscall.Errno(0x26)
-	ENOTSUP         = syscall.Errno(0x2d)
-	ENOTTY          = syscall.Errno(0x19)
-	ENXIO           = syscall.Errno(0x6)
-	EOPNOTSUPP      = syscall.Errno(0x66)
-	EOVERFLOW       = syscall.Errno(0x54)
-	EOWNERDEAD      = syscall.Errno(0x69)
-	EPERM           = syscall.Errno(0x1)
-	EPFNOSUPPORT    = syscall.Errno(0x2e)
-	EPIPE           = syscall.Errno(0x20)
-	EPROCLIM        = syscall.Errno(0x43)
-	EPROCUNAVAIL    = syscall.Errno(0x4c)
-	EPROGMISMATCH   = syscall.Errno(0x4b)
-	EPROGUNAVAIL    = syscall.Errno(0x4a)
-	EPROTO          = syscall.Errno(0x64)
-	EPROTONOSUPPORT = syscall.Errno(0x2b)
-	EPROTOTYPE      = syscall.Errno(0x29)
-	EPWROFF         = syscall.Errno(0x52)
-	EQFULL          = syscall.Errno(0x6a)
-	ERANGE          = syscall.Errno(0x22)
-	EREMOTE         = syscall.Errno(0x47)
-	EROFS           = syscall.Errno(0x1e)
-	ERPCMISMATCH    = syscall.Errno(0x49)
-	ESHLIBVERS      = syscall.Errno(0x57)
-	ESHUTDOWN       = syscall.Errno(0x3a)
-	ESOCKTNOSUPPORT = syscall.Errno(0x2c)
-	ESPIPE          = syscall.Errno(0x1d)
-	ESRCH           = syscall.Errno(0x3)
-	ESTALE          = syscall.Errno(0x46)
-	ETIME           = syscall.Errno(0x65)
-	ETIMEDOUT       = syscall.Errno(0x3c)
-	ETOOMANYREFS    = syscall.Errno(0x3b)
-	ETXTBSY         = syscall.Errno(0x1a)
-	EUSERS          = syscall.Errno(0x44)
-	EWOULDBLOCK     = syscall.Errno(0x23)
-	EXDEV           = syscall.Errno(0x12)
-)
-
-// Signals
-const (
-	SIGABRT   = syscall.Signal(0x6)
-	SIGALRM   = syscall.Signal(0xe)
-	SIGBUS    = syscall.Signal(0xa)
-	SIGCHLD   = syscall.Signal(0x14)
-	SIGCONT   = syscall.Signal(0x13)
-	SIGEMT    = syscall.Signal(0x7)
-	SIGFPE    = syscall.Signal(0x8)
-	SIGHUP    = syscall.Signal(0x1)
-	SIGILL    = syscall.Signal(0x4)
-	SIGINFO   = syscall.Signal(0x1d)
-	SIGINT    = syscall.Signal(0x2)
-	SIGIO     = syscall.Signal(0x17)
-	SIGIOT    = syscall.Signal(0x6)
-	SIGKILL   = syscall.Signal(0x9)
-	SIGPIPE   = syscall.Signal(0xd)
-	SIGPROF   = syscall.Signal(0x1b)
-	SIGQUIT   = syscall.Signal(0x3)
-	SIGSEGV   = syscall.Signal(0xb)
-	SIGSTOP   = syscall.Signal(0x11)
-	SIGSYS    = syscall.Signal(0xc)
-	SIGTERM   = syscall.Signal(0xf)
-	SIGTRAP   = syscall.Signal(0x5)
-	SIGTSTP   = syscall.Signal(0x12)
-	SIGTTIN   = syscall.Signal(0x15)
-	SIGTTOU   = syscall.Signal(0x16)
-	SIGURG    = syscall.Signal(0x10)
-	SIGUSR1   = syscall.Signal(0x1e)
-	SIGUSR2   = syscall.Signal(0x1f)
-	SIGVTALRM = syscall.Signal(0x1a)
-	SIGWINCH  = syscall.Signal(0x1c)
-	SIGXCPU   = syscall.Signal(0x18)
-	SIGXFSZ   = syscall.Signal(0x19)
-)
-
-// Error table
-var errorList = [...]struct {
-	num  syscall.Errno
-	name string
-	desc string
-}{
-	{1, "EPERM", "operation not permitted"},
-	{2, "ENOENT", "no such file or directory"},
-	{3, "ESRCH", "no such process"},
-	{4, "EINTR", "interrupted system call"},
-	{5, "EIO", "input/output error"},
-	{6, "ENXIO", "device not configured"},
-	{7, "E2BIG", "argument list too long"},
-	{8, "ENOEXEC", "exec format error"},
-	{9, "EBADF", "bad file descriptor"},
-	{10, "ECHILD", "no child processes"},
-	{11, "EDEADLK", "resource deadlock avoided"},
-	{12, "ENOMEM", "cannot allocate memory"},
-	{13, "EACCES", "permission denied"},
-	{14, "EFAULT", "bad address"},
-	{15, "ENOTBLK", "block device required"},
-	{16, "EBUSY", "resource busy"},
-	{17, "EEXIST", "file exists"},
-	{18, "EXDEV", "cross-device link"},
-	{19, "ENODEV", "operation not supported by device"},
-	{20, "ENOTDIR", "not a directory"},
-	{21, "EISDIR", "is a directory"},
-	{22, "EINVAL", "invalid argument"},
-	{23, "ENFILE", "too many open files in system"},
-	{24, "EMFILE", "too many open files"},
-	{25, "ENOTTY", "inappropriate ioctl for device"},
-	{26, "ETXTBSY", "text file busy"},
-	{27, "EFBIG", "file too large"},
-	{28, "ENOSPC", "no space left on device"},
-	{29, "ESPIPE", "illegal seek"},
-	{30, "EROFS", "read-only file system"},
-	{31, "EMLINK", "too many links"},
-	{32, "EPIPE", "broken pipe"},
-	{33, "EDOM", "numerical argument out of domain"},
-	{34, "ERANGE", "result too large"},
-	{35, "EAGAIN", "resource temporarily unavailable"},
-	{36, "EINPROGRESS", "operation now in progress"},
-	{37, "EALREADY", "operation already in progress"},
-	{38, "ENOTSOCK", "socket operation on non-socket"},
-	{39, "EDESTADDRREQ", "destination address required"},
-	{40, "EMSGSIZE", "message too long"},
-	{41, "EPROTOTYPE", "protocol wrong type for socket"},
-	{42, "ENOPROTOOPT", "protocol not available"},
-	{43, "EPROTONOSUPPORT", "protocol not supported"},
-	{44, "ESOCKTNOSUPPORT", "socket type not supported"},
-	{45, "ENOTSUP", "operation not supported"},
-	{46, "EPFNOSUPPORT", "protocol family not supported"},
-	{47, "EAFNOSUPPORT", "address family not supported by protocol family"},
-	{48, "EADDRINUSE", "address already in use"},
-	{49, "EADDRNOTAVAIL", "can't assign requested address"},
-	{50, "ENETDOWN", "network is down"},
-	{51, "ENETUNREACH", "network is unreachable"},
-	{52, "ENETRESET", "network dropped connection on reset"},
-	{53, "ECONNABORTED", "software caused connection abort"},
-	{54, "ECONNRESET", "connection reset by peer"},
-	{55, "ENOBUFS", "no buffer space available"},
-	{56, "EISCONN", "socket is already connected"},
-	{57, "ENOTCONN", "socket is not connected"},
-	{58, "ESHUTDOWN", "can't send after socket shutdown"},
-	{59, "ETOOMANYREFS", "too many references: can't splice"},
-	{60, "ETIMEDOUT", "operation timed out"},
-	{61, "ECONNREFUSED", "connection refused"},
-	{62, "ELOOP", "too many levels of symbolic links"},
-	{63, "ENAMETOOLONG", "file name too long"},
-	{64, "EHOSTDOWN", "host is down"},
-	{65, "EHOSTUNREACH", "no route to host"},
-	{66, "ENOTEMPTY", "directory not empty"},
-	{67, "EPROCLIM", "too many processes"},
-	{68, "EUSERS", "too many users"},
-	{69, "EDQUOT", "disc quota exceeded"},
-	{70, "ESTALE", "stale NFS file handle"},
-	{71, "EREMOTE", "too many levels of remote in path"},
-	{72, "EBADRPC", "RPC struct is bad"},
-	{73, "ERPCMISMATCH", "RPC version wrong"},
-	{74, "EPROGUNAVAIL", "RPC prog. not avail"},
-	{75, "EPROGMISMATCH", "program version wrong"},
-	{76, "EPROCUNAVAIL", "bad procedure for program"},
-	{77, "ENOLCK", "no locks available"},
-	{78, "ENOSYS", "function not implemented"},
-	{79, "EFTYPE", "inappropriate file type or format"},
-	{80, "EAUTH", "authentication error"},
-	{81, "ENEEDAUTH", "need authenticator"},
-	{82, "EPWROFF", "device power is off"},
-	{83, "EDEVERR", "device error"},
-	{84, "EOVERFLOW", "value too large to be stored in data type"},
-	{85, "EBADEXEC", "bad executable (or shared library)"},
-	{86, "EBADARCH", "bad CPU type in executable"},
-	{87, "ESHLIBVERS", "shared library version mismatch"},
-	{88, "EBADMACHO", "malformed Mach-o file"},
-	{89, "ECANCELED", "operation canceled"},
-	{90, "EIDRM", "identifier removed"},
-	{91, "ENOMSG", "no message of desired type"},
-	{92, "EILSEQ", "illegal byte sequence"},
-	{93, "ENOATTR", "attribute not found"},
-	{94, "EBADMSG", "bad message"},
-	{95, "EMULTIHOP", "EMULTIHOP (Reserved)"},
-	{96, "ENODATA", "no message available on STREAM"},
-	{97, "ENOLINK", "ENOLINK (Reserved)"},
-	{98, "ENOSR", "no STREAM resources"},
-	{99, "ENOSTR", "not a STREAM"},
-	{100, "EPROTO", "protocol error"},
-	{101, "ETIME", "STREAM ioctl timeout"},
-	{102, "EOPNOTSUPP", "operation not supported on socket"},
-	{103, "ENOPOLICY", "policy not found"},
-	{104, "ENOTRECOVERABLE", "state not recoverable"},
-	{105, "EOWNERDEAD", "previous owner died"},
-	{106, "EQFULL", "interface output queue is full"},
-}
-
-// Signal table
-var signalList = [...]struct {
-	num  syscall.Signal
-	name string
-	desc string
-}{
-	{1, "SIGHUP", "hangup"},
-	{2, "SIGINT", "interrupt"},
-	{3, "SIGQUIT", "quit"},
-	{4, "SIGILL", "illegal instruction"},
-	{5, "SIGTRAP", "trace/BPT trap"},
-	{6, "SIGABRT", "abort trap"},
-	{7, "SIGEMT", "EMT trap"},
-	{8, "SIGFPE", "floating point exception"},
-	{9, "SIGKILL", "killed"},
-	{10, "SIGBUS", "bus error"},
-	{11, "SIGSEGV", "segmentation fault"},
-	{12, "SIGSYS", "bad system call"},
-	{13, "SIGPIPE", "broken pipe"},
-	{14, "SIGALRM", "alarm clock"},
-	{15, "SIGTERM", "terminated"},
-	{16, "SIGURG", "urgent I/O condition"},
-	{17, "SIGSTOP", "suspended (signal)"},
-	{18, "SIGTSTP", "suspended"},
-	{19, "SIGCONT", "continued"},
-	{20, "SIGCHLD", "child exited"},
-	{21, "SIGTTIN", "stopped (tty input)"},
-	{22, "SIGTTOU", "stopped (tty output)"},
-	{23, "SIGIO", "I/O possible"},
-	{24, "SIGXCPU", "cputime limit exceeded"},
-	{25, "SIGXFSZ", "filesize limit exceeded"},
-	{26, "SIGVTALRM", "virtual timer expired"},
-	{27, "SIGPROF", "profiling timer expired"},
-	{28, "SIGWINCH", "window size changes"},
-	{29, "SIGINFO", "information request"},
-	{30, "SIGUSR1", "user defined signal 1"},
-	{31, "SIGUSR2", "user defined signal 2"},
-}
diff --git a/src/cmd/vendor/golang.org/x/sys/unix/zerrors_darwin_arm.go b/src/cmd/vendor/golang.org/x/sys/unix/zerrors_darwin_arm.go
deleted file mode 100644
index e748cb1105..0000000000
--- a/src/cmd/vendor/golang.org/x/sys/unix/zerrors_darwin_arm.go
+++ /dev/null
@@ -1,1789 +0,0 @@
-// mkerrors.sh
-// Code generated by the command above; see README.md. DO NOT EDIT.
-
-//go:build arm && darwin
-// +build arm,darwin
-
-// Code generated by cmd/cgo -godefs; DO NOT EDIT.
-// cgo -godefs -- _const.go
-
-package unix
-
-import "syscall"
-
-const (
-	AF_APPLETALK                      = 0x10
-	AF_CCITT                          = 0xa
-	AF_CHAOS                          = 0x5
-	AF_CNT                            = 0x15
-	AF_COIP                           = 0x14
-	AF_DATAKIT                        = 0x9
-	AF_DECnet                         = 0xc
-	AF_DLI                            = 0xd
-	AF_E164                           = 0x1c
-	AF_ECMA                           = 0x8
-	AF_HYLINK                         = 0xf
-	AF_IEEE80211                      = 0x25
-	AF_IMPLINK                        = 0x3
-	AF_INET                           = 0x2
-	AF_INET6                          = 0x1e
-	AF_IPX                            = 0x17
-	AF_ISDN                           = 0x1c
-	AF_ISO                            = 0x7
-	AF_LAT                            = 0xe
-	AF_LINK                           = 0x12
-	AF_LOCAL                          = 0x1
-	AF_MAX                            = 0x28
-	AF_NATM                           = 0x1f
-	AF_NDRV                           = 0x1b
-	AF_NETBIOS                        = 0x21
-	AF_NS                             = 0x6
-	AF_OSI                            = 0x7
-	AF_PPP                            = 0x22
-	AF_PUP                            = 0x4
-	AF_RESERVED_36                    = 0x24
-	AF_ROUTE                          = 0x11
-	AF_SIP                            = 0x18
-	AF_SNA                            = 0xb
-	AF_SYSTEM                         = 0x20
-	AF_SYS_CONTROL                    = 0x2
-	AF_UNIX                           = 0x1
-	AF_UNSPEC                         = 0x0
-	AF_UTUN                           = 0x26
-	ALTWERASE                         = 0x200
-	ATTR_BIT_MAP_COUNT                = 0x5
-	ATTR_CMN_ACCESSMASK               = 0x20000
-	ATTR_CMN_ACCTIME                  = 0x1000
-	ATTR_CMN_ADDEDTIME                = 0x10000000
-	ATTR_CMN_BKUPTIME                 = 0x2000
-	ATTR_CMN_CHGTIME                  = 0x800
-	ATTR_CMN_CRTIME                   = 0x200
-	ATTR_CMN_DATA_PROTECT_FLAGS       = 0x40000000
-	ATTR_CMN_DEVID                    = 0x2
-	ATTR_CMN_DOCUMENT_ID              = 0x100000
-	ATTR_CMN_ERROR                    = 0x20000000
-	ATTR_CMN_EXTENDED_SECURITY        = 0x400000
-	ATTR_CMN_FILEID                   = 0x2000000
-	ATTR_CMN_FLAGS                    = 0x40000
-	ATTR_CMN_FNDRINFO                 = 0x4000
-	ATTR_CMN_FSID                     = 0x4
-	ATTR_CMN_FULLPATH                 = 0x8000000
-	ATTR_CMN_GEN_COUNT                = 0x80000
-	ATTR_CMN_GRPID                    = 0x10000
-	ATTR_CMN_GRPUUID                  = 0x1000000
-	ATTR_CMN_MODTIME                  = 0x400
-	ATTR_CMN_NAME                     = 0x1
-	ATTR_CMN_NAMEDATTRCOUNT           = 0x80000
-	ATTR_CMN_NAMEDATTRLIST            = 0x100000
-	ATTR_CMN_OBJID                    = 0x20
-	ATTR_CMN_OBJPERMANENTID           = 0x40
-	ATTR_CMN_OBJTAG                   = 0x10
-	ATTR_CMN_OBJTYPE                  = 0x8
-	ATTR_CMN_OWNERID                  = 0x8000
-	ATTR_CMN_PARENTID                 = 0x4000000
-	ATTR_CMN_PAROBJID                 = 0x80
-	ATTR_CMN_RETURNED_ATTRS           = 0x80000000
-	ATTR_CMN_SCRIPT                   = 0x100
-	ATTR_CMN_SETMASK                  = 0x41c7ff00
-	ATTR_CMN_USERACCESS               = 0x200000
-	ATTR_CMN_UUID                     = 0x800000
-	ATTR_CMN_VALIDMASK                = 0xffffffff
-	ATTR_CMN_VOLSETMASK               = 0x6700
-	ATTR_FILE_ALLOCSIZE               = 0x4
-	ATTR_FILE_CLUMPSIZE               = 0x10
-	ATTR_FILE_DATAALLOCSIZE           = 0x400
-	ATTR_FILE_DATAEXTENTS             = 0x800
-	ATTR_FILE_DATALENGTH              = 0x200
-	ATTR_FILE_DEVTYPE                 = 0x20
-	ATTR_FILE_FILETYPE                = 0x40
-	ATTR_FILE_FORKCOUNT               = 0x80
-	ATTR_FILE_FORKLIST                = 0x100
-	ATTR_FILE_IOBLOCKSIZE             = 0x8
-	ATTR_FILE_LINKCOUNT               = 0x1
-	ATTR_FILE_RSRCALLOCSIZE           = 0x2000
-	ATTR_FILE_RSRCEXTENTS             = 0x4000
-	ATTR_FILE_RSRCLENGTH              = 0x1000
-	ATTR_FILE_SETMASK                 = 0x20
-	ATTR_FILE_TOTALSIZE               = 0x2
-	ATTR_FILE_VALIDMASK               = 0x37ff
-	ATTR_VOL_ALLOCATIONCLUMP          = 0x40
-	ATTR_VOL_ATTRIBUTES               = 0x40000000
-	ATTR_VOL_CAPABILITIES             = 0x20000
-	ATTR_VOL_DIRCOUNT                 = 0x400
-	ATTR_VOL_ENCODINGSUSED            = 0x10000
-	ATTR_VOL_FILECOUNT                = 0x200
-	ATTR_VOL_FSTYPE                   = 0x1
-	ATTR_VOL_INFO                     = 0x80000000
-	ATTR_VOL_IOBLOCKSIZE              = 0x80
-	ATTR_VOL_MAXOBJCOUNT              = 0x800
-	ATTR_VOL_MINALLOCATION            = 0x20
-	ATTR_VOL_MOUNTEDDEVICE            = 0x8000
-	ATTR_VOL_MOUNTFLAGS               = 0x4000
-	ATTR_VOL_MOUNTPOINT               = 0x1000
-	ATTR_VOL_NAME                     = 0x2000
-	ATTR_VOL_OBJCOUNT                 = 0x100
-	ATTR_VOL_QUOTA_SIZE               = 0x10000000
-	ATTR_VOL_RESERVED_SIZE            = 0x20000000
-	ATTR_VOL_SETMASK                  = 0x80002000
-	ATTR_VOL_SIGNATURE                = 0x2
-	ATTR_VOL_SIZE                     = 0x4
-	ATTR_VOL_SPACEAVAIL               = 0x10
-	ATTR_VOL_SPACEFREE                = 0x8
-	ATTR_VOL_UUID                     = 0x40000
-	ATTR_VOL_VALIDMASK                = 0xf007ffff
-	B0                                = 0x0
-	B110                              = 0x6e
-	B115200                           = 0x1c200
-	B1200                             = 0x4b0
-	B134                              = 0x86
-	B14400                            = 0x3840
-	B150                              = 0x96
-	B1800                             = 0x708
-	B19200                            = 0x4b00
-	B200                              = 0xc8
-	B230400                           = 0x38400
-	B2400                             = 0x960
-	B28800                            = 0x7080
-	B300                              = 0x12c
-	B38400                            = 0x9600
-	B4800                             = 0x12c0
-	B50                               = 0x32
-	B57600                            = 0xe100
-	B600                              = 0x258
-	B7200                             = 0x1c20
-	B75                               = 0x4b
-	B76800                            = 0x12c00
-	B9600                             = 0x2580
-	BIOCFLUSH                         = 0x20004268
-	BIOCGBLEN                         = 0x40044266
-	BIOCGDLT                          = 0x4004426a
-	BIOCGDLTLIST                      = 0xc00c4279
-	BIOCGETIF                         = 0x4020426b
-	BIOCGHDRCMPLT                     = 0x40044274
-	BIOCGRSIG                         = 0x40044272
-	BIOCGRTIMEOUT                     = 0x4010426e
-	BIOCGSEESENT                      = 0x40044276
-	BIOCGSTATS                        = 0x4008426f
-	BIOCIMMEDIATE                     = 0x80044270
-	BIOCPROMISC                       = 0x20004269
-	BIOCSBLEN                         = 0xc0044266
-	BIOCSDLT                          = 0x80044278
-	BIOCSETF                          = 0x80104267
-	BIOCSETFNR                        = 0x8010427e
-	BIOCSETIF                         = 0x8020426c
-	BIOCSHDRCMPLT                     = 0x80044275
-	BIOCSRSIG                         = 0x80044273
-	BIOCSRTIMEOUT                     = 0x8010426d
-	BIOCSSEESENT                      = 0x80044277
-	BIOCVERSION                       = 0x40044271
-	BPF_A                             = 0x10
-	BPF_ABS                           = 0x20
-	BPF_ADD                           = 0x0
-	BPF_ALIGNMENT                     = 0x4
-	BPF_ALU                           = 0x4
-	BPF_AND                           = 0x50
-	BPF_B                             = 0x10
-	BPF_DIV                           = 0x30
-	BPF_H                             = 0x8
-	BPF_IMM                           = 0x0
-	BPF_IND                           = 0x40
-	BPF_JA                            = 0x0
-	BPF_JEQ                           = 0x10
-	BPF_JGE                           = 0x30
-	BPF_JGT                           = 0x20
-	BPF_JMP                           = 0x5
-	BPF_JSET                          = 0x40
-	BPF_K                             = 0x0
-	BPF_LD                            = 0x0
-	BPF_LDX                           = 0x1
-	BPF_LEN                           = 0x80
-	BPF_LSH                           = 0x60
-	BPF_MAJOR_VERSION                 = 0x1
-	BPF_MAXBUFSIZE                    = 0x80000
-	BPF_MAXINSNS                      = 0x200
-	BPF_MEM                           = 0x60
-	BPF_MEMWORDS                      = 0x10
-	BPF_MINBUFSIZE                    = 0x20
-	BPF_MINOR_VERSION                 = 0x1
-	BPF_MISC                          = 0x7
-	BPF_MSH                           = 0xa0
-	BPF_MUL                           = 0x20
-	BPF_NEG                           = 0x80
-	BPF_OR                            = 0x40
-	BPF_RELEASE                       = 0x30bb6
-	BPF_RET                           = 0x6
-	BPF_RSH                           = 0x70
-	BPF_ST                            = 0x2
-	BPF_STX                           = 0x3
-	BPF_SUB                           = 0x10
-	BPF_TAX                           = 0x0
-	BPF_TXA                           = 0x80
-	BPF_W                             = 0x0
-	BPF_X                             = 0x8
-	BRKINT                            = 0x2
-	BS0                               = 0x0
-	BS1                               = 0x8000
-	BSDLY                             = 0x8000
-	CFLUSH                            = 0xf
-	CLOCAL                            = 0x8000
-	CLOCK_MONOTONIC                   = 0x6
-	CLOCK_MONOTONIC_RAW               = 0x4
-	CLOCK_MONOTONIC_RAW_APPROX        = 0x5
-	CLOCK_PROCESS_CPUTIME_ID          = 0xc
-	CLOCK_REALTIME                    = 0x0
-	CLOCK_THREAD_CPUTIME_ID           = 0x10
-	CLOCK_UPTIME_RAW                  = 0x8
-	CLOCK_UPTIME_RAW_APPROX           = 0x9
-	CLONE_NOFOLLOW                    = 0x1
-	CLONE_NOOWNERCOPY                 = 0x2
-	CR0                               = 0x0
-	CR1                               = 0x1000
-	CR2                               = 0x2000
-	CR3                               = 0x3000
-	CRDLY                             = 0x3000
-	CREAD                             = 0x800
-	CRTSCTS                           = 0x30000
-	CS5                               = 0x0
-	CS6                               = 0x100
-	CS7                               = 0x200
-	CS8                               = 0x300
-	CSIZE                             = 0x300
-	CSTART                            = 0x11
-	CSTATUS                           = 0x14
-	CSTOP                             = 0x13
-	CSTOPB                            = 0x400
-	CSUSP                             = 0x1a
-	CTLIOCGINFO                       = 0xc0644e03
-	CTL_HW                            = 0x6
-	CTL_KERN                          = 0x1
-	CTL_MAXNAME                       = 0xc
-	CTL_NET                           = 0x4
-	DLT_A429                          = 0xb8
-	DLT_A653_ICM                      = 0xb9
-	DLT_AIRONET_HEADER                = 0x78
-	DLT_AOS                           = 0xde
-	DLT_APPLE_IP_OVER_IEEE1394        = 0x8a
-	DLT_ARCNET                        = 0x7
-	DLT_ARCNET_LINUX                  = 0x81
-	DLT_ATM_CLIP                      = 0x13
-	DLT_ATM_RFC1483                   = 0xb
-	DLT_AURORA                        = 0x7e
-	DLT_AX25                          = 0x3
-	DLT_AX25_KISS                     = 0xca
-	DLT_BACNET_MS_TP                  = 0xa5
-	DLT_BLUETOOTH_HCI_H4              = 0xbb
-	DLT_BLUETOOTH_HCI_H4_WITH_PHDR    = 0xc9
-	DLT_CAN20B                        = 0xbe
-	DLT_CAN_SOCKETCAN                 = 0xe3
-	DLT_CHAOS                         = 0x5
-	DLT_CHDLC                         = 0x68
-	DLT_CISCO_IOS                     = 0x76
-	DLT_C_HDLC                        = 0x68
-	DLT_C_HDLC_WITH_DIR               = 0xcd
-	DLT_DBUS                          = 0xe7
-	DLT_DECT                          = 0xdd
-	DLT_DOCSIS                        = 0x8f
-	DLT_DVB_CI                        = 0xeb
-	DLT_ECONET                        = 0x73
-	DLT_EN10MB                        = 0x1
-	DLT_EN3MB                         = 0x2
-	DLT_ENC                           = 0x6d
-	DLT_ERF                           = 0xc5
-	DLT_ERF_ETH                       = 0xaf
-	DLT_ERF_POS                       = 0xb0
-	DLT_FC_2                          = 0xe0
-	DLT_FC_2_WITH_FRAME_DELIMS        = 0xe1
-	DLT_FDDI                          = 0xa
-	DLT_FLEXRAY                       = 0xd2
-	DLT_FRELAY                        = 0x6b
-	DLT_FRELAY_WITH_DIR               = 0xce
-	DLT_GCOM_SERIAL                   = 0xad
-	DLT_GCOM_T1E1                     = 0xac
-	DLT_GPF_F                         = 0xab
-	DLT_GPF_T                         = 0xaa
-	DLT_GPRS_LLC                      = 0xa9
-	DLT_GSMTAP_ABIS                   = 0xda
-	DLT_GSMTAP_UM                     = 0xd9
-	DLT_HHDLC                         = 0x79
-	DLT_IBM_SN                        = 0x92
-	DLT_IBM_SP                        = 0x91
-	DLT_IEEE802                       = 0x6
-	DLT_IEEE802_11                    = 0x69
-	DLT_IEEE802_11_RADIO              = 0x7f
-	DLT_IEEE802_11_RADIO_AVS          = 0xa3
-	DLT_IEEE802_15_4                  = 0xc3
-	DLT_IEEE802_15_4_LINUX            = 0xbf
-	DLT_IEEE802_15_4_NOFCS            = 0xe6
-	DLT_IEEE802_15_4_NONASK_PHY       = 0xd7
-	DLT_IEEE802_16_MAC_CPS            = 0xbc
-	DLT_IEEE802_16_MAC_CPS_RADIO      = 0xc1
-	DLT_IPFILTER                      = 0x74
-	DLT_IPMB                          = 0xc7
-	DLT_IPMB_LINUX                    = 0xd1
-	DLT_IPNET                         = 0xe2
-	DLT_IPOIB                         = 0xf2
-	DLT_IPV4                          = 0xe4
-	DLT_IPV6                          = 0xe5
-	DLT_IP_OVER_FC                    = 0x7a
-	DLT_JUNIPER_ATM1                  = 0x89
-	DLT_JUNIPER_ATM2                  = 0x87
-	DLT_JUNIPER_ATM_CEMIC             = 0xee
-	DLT_JUNIPER_CHDLC                 = 0xb5
-	DLT_JUNIPER_ES                    = 0x84
-	DLT_JUNIPER_ETHER                 = 0xb2
-	DLT_JUNIPER_FIBRECHANNEL          = 0xea
-	DLT_JUNIPER_FRELAY                = 0xb4
-	DLT_JUNIPER_GGSN                  = 0x85
-	DLT_JUNIPER_ISM                   = 0xc2
-	DLT_JUNIPER_MFR                   = 0x86
-	DLT_JUNIPER_MLFR                  = 0x83
-	DLT_JUNIPER_MLPPP                 = 0x82
-	DLT_JUNIPER_MONITOR               = 0xa4
-	DLT_JUNIPER_PIC_PEER              = 0xae
-	DLT_JUNIPER_PPP                   = 0xb3
-	DLT_JUNIPER_PPPOE                 = 0xa7
-	DLT_JUNIPER_PPPOE_ATM             = 0xa8
-	DLT_JUNIPER_SERVICES              = 0x88
-	DLT_JUNIPER_SRX_E2E               = 0xe9
-	DLT_JUNIPER_ST                    = 0xc8
-	DLT_JUNIPER_VP                    = 0xb7
-	DLT_JUNIPER_VS                    = 0xe8
-	DLT_LAPB_WITH_DIR                 = 0xcf
-	DLT_LAPD                          = 0xcb
-	DLT_LIN                           = 0xd4
-	DLT_LINUX_EVDEV                   = 0xd8
-	DLT_LINUX_IRDA                    = 0x90
-	DLT_LINUX_LAPD                    = 0xb1
-	DLT_LINUX_PPP_WITHDIRECTION       = 0xa6
-	DLT_LINUX_SLL                     = 0x71
-	DLT_LOOP                          = 0x6c
-	DLT_LTALK                         = 0x72
-	DLT_MATCHING_MAX                  = 0xf5
-	DLT_MATCHING_MIN                  = 0x68
-	DLT_MFR                           = 0xb6
-	DLT_MOST                          = 0xd3
-	DLT_MPEG_2_TS                     = 0xf3
-	DLT_MPLS                          = 0xdb
-	DLT_MTP2                          = 0x8c
-	DLT_MTP2_WITH_PHDR                = 0x8b
-	DLT_MTP3                          = 0x8d
-	DLT_MUX27010                      = 0xec
-	DLT_NETANALYZER                   = 0xf0
-	DLT_NETANALYZER_TRANSPARENT       = 0xf1
-	DLT_NFC_LLCP                      = 0xf5
-	DLT_NFLOG                         = 0xef
-	DLT_NG40                          = 0xf4
-	DLT_NULL                          = 0x0
-	DLT_PCI_EXP                       = 0x7d
-	DLT_PFLOG                         = 0x75
-	DLT_PFSYNC                        = 0x12
-	DLT_PPI                           = 0xc0
-	DLT_PPP                           = 0x9
-	DLT_PPP_BSDOS                     = 0x10
-	DLT_PPP_ETHER                     = 0x33
-	DLT_PPP_PPPD                      = 0xa6
-	DLT_PPP_SERIAL                    = 0x32
-	DLT_PPP_WITH_DIR                  = 0xcc
-	DLT_PPP_WITH_DIRECTION            = 0xa6
-	DLT_PRISM_HEADER                  = 0x77
-	DLT_PRONET                        = 0x4
-	DLT_RAIF1                         = 0xc6
-	DLT_RAW                           = 0xc
-	DLT_RIO                           = 0x7c
-	DLT_SCCP                          = 0x8e
-	DLT_SITA                          = 0xc4
-	DLT_SLIP                          = 0x8
-	DLT_SLIP_BSDOS                    = 0xf
-	DLT_STANAG_5066_D_PDU             = 0xed
-	DLT_SUNATM                        = 0x7b
-	DLT_SYMANTEC_FIREWALL             = 0x63
-	DLT_TZSP                          = 0x80
-	DLT_USB                           = 0xba
-	DLT_USB_LINUX                     = 0xbd
-	DLT_USB_LINUX_MMAPPED             = 0xdc
-	DLT_USER0                         = 0x93
-	DLT_USER1                         = 0x94
-	DLT_USER10                        = 0x9d
-	DLT_USER11                        = 0x9e
-	DLT_USER12                        = 0x9f
-	DLT_USER13                        = 0xa0
-	DLT_USER14                        = 0xa1
-	DLT_USER15                        = 0xa2
-	DLT_USER2                         = 0x95
-	DLT_USER3                         = 0x96
-	DLT_USER4                         = 0x97
-	DLT_USER5                         = 0x98
-	DLT_USER6                         = 0x99
-	DLT_USER7                         = 0x9a
-	DLT_USER8                         = 0x9b
-	DLT_USER9                         = 0x9c
-	DLT_WIHART                        = 0xdf
-	DLT_X2E_SERIAL                    = 0xd5
-	DLT_X2E_XORAYA                    = 0xd6
-	DT_BLK                            = 0x6
-	DT_CHR                            = 0x2
-	DT_DIR                            = 0x4
-	DT_FIFO                           = 0x1
-	DT_LNK                            = 0xa
-	DT_REG                            = 0x8
-	DT_SOCK                           = 0xc
-	DT_UNKNOWN                        = 0x0
-	DT_WHT                            = 0xe
-	ECHO                              = 0x8
-	ECHOCTL                           = 0x40
-	ECHOE                             = 0x2
-	ECHOK                             = 0x4
-	ECHOKE                            = 0x1
-	ECHONL                            = 0x10
-	ECHOPRT                           = 0x20
-	EVFILT_AIO                        = -0x3
-	EVFILT_EXCEPT                     = -0xf
-	EVFILT_FS                         = -0x9
-	EVFILT_MACHPORT                   = -0x8
-	EVFILT_PROC                       = -0x5
-	EVFILT_READ                       = -0x1
-	EVFILT_SIGNAL                     = -0x6
-	EVFILT_SYSCOUNT                   = 0xf
-	EVFILT_THREADMARKER               = 0xf
-	EVFILT_TIMER                      = -0x7
-	EVFILT_USER                       = -0xa
-	EVFILT_VM                         = -0xc
-	EVFILT_VNODE                      = -0x4
-	EVFILT_WRITE                      = -0x2
-	EV_ADD                            = 0x1
-	EV_CLEAR                          = 0x20
-	EV_DELETE                         = 0x2
-	EV_DISABLE                        = 0x8
-	EV_DISPATCH                       = 0x80
-	EV_DISPATCH2                      = 0x180
-	EV_ENABLE                         = 0x4
-	EV_EOF                            = 0x8000
-	EV_ERROR                          = 0x4000
-	EV_FLAG0                          = 0x1000
-	EV_FLAG1                          = 0x2000
-	EV_ONESHOT                        = 0x10
-	EV_OOBAND                         = 0x2000
-	EV_POLL                           = 0x1000
-	EV_RECEIPT                        = 0x40
-	EV_SYSFLAGS                       = 0xf000
-	EV_UDATA_SPECIFIC                 = 0x100
-	EV_VANISHED                       = 0x200
-	EXTA                              = 0x4b00
-	EXTB                              = 0x9600
-	EXTPROC                           = 0x800
-	FD_CLOEXEC                        = 0x1
-	FD_SETSIZE                        = 0x400
-	FF0                               = 0x0
-	FF1                               = 0x4000
-	FFDLY                             = 0x4000
-	FLUSHO                            = 0x800000
-	FSOPT_ATTR_CMN_EXTENDED           = 0x20
-	FSOPT_NOFOLLOW                    = 0x1
-	FSOPT_NOINMEMUPDATE               = 0x2
-	FSOPT_PACK_INVAL_ATTRS            = 0x8
-	FSOPT_REPORT_FULLSIZE             = 0x4
-	F_ADDFILESIGS                     = 0x3d
-	F_ADDFILESIGS_FOR_DYLD_SIM        = 0x53
-	F_ADDFILESIGS_RETURN              = 0x61
-	F_ADDSIGS                         = 0x3b
-	F_ALLOCATEALL                     = 0x4
-	F_ALLOCATECONTIG                  = 0x2
-	F_BARRIERFSYNC                    = 0x55
-	F_CHECK_LV                        = 0x62
-	F_CHKCLEAN                        = 0x29
-	F_DUPFD                           = 0x0
-	F_DUPFD_CLOEXEC                   = 0x43
-	F_FINDSIGS                        = 0x4e
-	F_FLUSH_DATA                      = 0x28
-	F_FREEZE_FS                       = 0x35
-	F_FULLFSYNC                       = 0x33
-	F_GETCODEDIR                      = 0x48
-	F_GETFD                           = 0x1
-	F_GETFL                           = 0x3
-	F_GETLK                           = 0x7
-	F_GETLKPID                        = 0x42
-	F_GETNOSIGPIPE                    = 0x4a
-	F_GETOWN                          = 0x5
-	F_GETPATH                         = 0x32
-	F_GETPATH_MTMINFO                 = 0x47
-	F_GETPROTECTIONCLASS              = 0x3f
-	F_GETPROTECTIONLEVEL              = 0x4d
-	F_GLOBAL_NOCACHE                  = 0x37
-	F_LOG2PHYS                        = 0x31
-	F_LOG2PHYS_EXT                    = 0x41
-	F_NOCACHE                         = 0x30
-	F_NODIRECT                        = 0x3e
-	F_OK                              = 0x0
-	F_PATHPKG_CHECK                   = 0x34
-	F_PEOFPOSMODE                     = 0x3
-	F_PREALLOCATE                     = 0x2a
-	F_PUNCHHOLE                       = 0x63
-	F_RDADVISE                        = 0x2c
-	F_RDAHEAD                         = 0x2d
-	F_RDLCK                           = 0x1
-	F_SETBACKINGSTORE                 = 0x46
-	F_SETFD                           = 0x2
-	F_SETFL                           = 0x4
-	F_SETLK                           = 0x8
-	F_SETLKW                          = 0x9
-	F_SETLKWTIMEOUT                   = 0xa
-	F_SETNOSIGPIPE                    = 0x49
-	F_SETOWN                          = 0x6
-	F_SETPROTECTIONCLASS              = 0x40
-	F_SETSIZE                         = 0x2b
-	F_SINGLE_WRITER                   = 0x4c
-	F_THAW_FS                         = 0x36
-	F_TRANSCODEKEY                    = 0x4b
-	F_TRIM_ACTIVE_FILE                = 0x64
-	F_UNLCK                           = 0x2
-	F_VOLPOSMODE                      = 0x4
-	F_WRLCK                           = 0x3
-	HUPCL                             = 0x4000
-	HW_MACHINE                        = 0x1
-	ICANON                            = 0x100
-	ICMP6_FILTER                      = 0x12
-	ICRNL                             = 0x100
-	IEXTEN                            = 0x400
-	IFF_ALLMULTI                      = 0x200
-	IFF_ALTPHYS                       = 0x4000
-	IFF_BROADCAST                     = 0x2
-	IFF_DEBUG                         = 0x4
-	IFF_LINK0                         = 0x1000
-	IFF_LINK1                         = 0x2000
-	IFF_LINK2                         = 0x4000
-	IFF_LOOPBACK                      = 0x8
-	IFF_MULTICAST                     = 0x8000
-	IFF_NOARP                         = 0x80
-	IFF_NOTRAILERS                    = 0x20
-	IFF_OACTIVE                       = 0x400
-	IFF_POINTOPOINT                   = 0x10
-	IFF_PROMISC                       = 0x100
-	IFF_RUNNING                       = 0x40
-	IFF_SIMPLEX                       = 0x800
-	IFF_UP                            = 0x1
-	IFNAMSIZ                          = 0x10
-	IFT_1822                          = 0x2
-	IFT_AAL5                          = 0x31
-	IFT_ARCNET                        = 0x23
-	IFT_ARCNETPLUS                    = 0x24
-	IFT_ATM                           = 0x25
-	IFT_BRIDGE                        = 0xd1
-	IFT_CARP                          = 0xf8
-	IFT_CELLULAR                      = 0xff
-	IFT_CEPT                          = 0x13
-	IFT_DS3                           = 0x1e
-	IFT_ENC                           = 0xf4
-	IFT_EON                           = 0x19
-	IFT_ETHER                         = 0x6
-	IFT_FAITH                         = 0x38
-	IFT_FDDI                          = 0xf
-	IFT_FRELAY                        = 0x20
-	IFT_FRELAYDCE                     = 0x2c
-	IFT_GIF                           = 0x37
-	IFT_HDH1822                       = 0x3
-	IFT_HIPPI                         = 0x2f
-	IFT_HSSI                          = 0x2e
-	IFT_HY                            = 0xe
-	IFT_IEEE1394                      = 0x90
-	IFT_IEEE8023ADLAG                 = 0x88
-	IFT_ISDNBASIC                     = 0x14
-	IFT_ISDNPRIMARY                   = 0x15
-	IFT_ISO88022LLC                   = 0x29
-	IFT_ISO88023                      = 0x7
-	IFT_ISO88024                      = 0x8
-	IFT_ISO88025                      = 0x9
-	IFT_ISO88026                      = 0xa
-	IFT_L2VLAN                        = 0x87
-	IFT_LAPB                          = 0x10
-	IFT_LOCALTALK                     = 0x2a
-	IFT_LOOP                          = 0x18
-	IFT_MIOX25                        = 0x26
-	IFT_MODEM                         = 0x30
-	IFT_NSIP                          = 0x1b
-	IFT_OTHER                         = 0x1
-	IFT_P10                           = 0xc
-	IFT_P80                           = 0xd
-	IFT_PARA                          = 0x22
-	IFT_PDP                           = 0xff
-	IFT_PFLOG                         = 0xf5
-	IFT_PFSYNC                        = 0xf6
-	IFT_PKTAP                         = 0xfe
-	IFT_PPP                           = 0x17
-	IFT_PROPMUX                       = 0x36
-	IFT_PROPVIRTUAL                   = 0x35
-	IFT_PTPSERIAL                     = 0x16
-	IFT_RS232                         = 0x21
-	IFT_SDLC                          = 0x11
-	IFT_SIP                           = 0x1f
-	IFT_SLIP                          = 0x1c
-	IFT_SMDSDXI                       = 0x2b
-	IFT_SMDSICIP                      = 0x34
-	IFT_SONET                         = 0x27
-	IFT_SONETPATH                     = 0x32
-	IFT_SONETVT                       = 0x33
-	IFT_STARLAN                       = 0xb
-	IFT_STF                           = 0x39
-	IFT_T1                            = 0x12
-	IFT_ULTRA                         = 0x1d
-	IFT_V35                           = 0x2d
-	IFT_X25                           = 0x5
-	IFT_X25DDN                        = 0x4
-	IFT_X25PLE                        = 0x28
-	IFT_XETHER                        = 0x1a
-	IGNBRK                            = 0x1
-	IGNCR                             = 0x80
-	IGNPAR                            = 0x4
-	IMAXBEL                           = 0x2000
-	INLCR                             = 0x40
-	INPCK                             = 0x10
-	IN_CLASSA_HOST                    = 0xffffff
-	IN_CLASSA_MAX                     = 0x80
-	IN_CLASSA_NET                     = 0xff000000
-	IN_CLASSA_NSHIFT                  = 0x18
-	IN_CLASSB_HOST                    = 0xffff
-	IN_CLASSB_MAX                     = 0x10000
-	IN_CLASSB_NET                     = 0xffff0000
-	IN_CLASSB_NSHIFT                  = 0x10
-	IN_CLASSC_HOST                    = 0xff
-	IN_CLASSC_NET                     = 0xffffff00
-	IN_CLASSC_NSHIFT                  = 0x8
-	IN_CLASSD_HOST                    = 0xfffffff
-	IN_CLASSD_NET                     = 0xf0000000
-	IN_CLASSD_NSHIFT                  = 0x1c
-	IN_LINKLOCALNETNUM                = 0xa9fe0000
-	IN_LOOPBACKNET                    = 0x7f
-	IPPROTO_3PC                       = 0x22
-	IPPROTO_ADFS                      = 0x44
-	IPPROTO_AH                        = 0x33
-	IPPROTO_AHIP                      = 0x3d
-	IPPROTO_APES                      = 0x63
-	IPPROTO_ARGUS                     = 0xd
-	IPPROTO_AX25                      = 0x5d
-	IPPROTO_BHA                       = 0x31
-	IPPROTO_BLT                       = 0x1e
-	IPPROTO_BRSATMON                  = 0x4c
-	IPPROTO_CFTP                      = 0x3e
-	IPPROTO_CHAOS                     = 0x10
-	IPPROTO_CMTP                      = 0x26
-	IPPROTO_CPHB                      = 0x49
-	IPPROTO_CPNX                      = 0x48
-	IPPROTO_DDP                       = 0x25
-	IPPROTO_DGP                       = 0x56
-	IPPROTO_DIVERT                    = 0xfe
-	IPPROTO_DONE                      = 0x101
-	IPPROTO_DSTOPTS                   = 0x3c
-	IPPROTO_EGP                       = 0x8
-	IPPROTO_EMCON                     = 0xe
-	IPPROTO_ENCAP                     = 0x62
-	IPPROTO_EON                       = 0x50
-	IPPROTO_ESP                       = 0x32
-	IPPROTO_ETHERIP                   = 0x61
-	IPPROTO_FRAGMENT                  = 0x2c
-	IPPROTO_GGP                       = 0x3
-	IPPROTO_GMTP                      = 0x64
-	IPPROTO_GRE                       = 0x2f
-	IPPROTO_HELLO                     = 0x3f
-	IPPROTO_HMP                       = 0x14
-	IPPROTO_HOPOPTS                   = 0x0
-	IPPROTO_ICMP                      = 0x1
-	IPPROTO_ICMPV6                    = 0x3a
-	IPPROTO_IDP                       = 0x16
-	IPPROTO_IDPR                      = 0x23
-	IPPROTO_IDRP                      = 0x2d
-	IPPROTO_IGMP                      = 0x2
-	IPPROTO_IGP                       = 0x55
-	IPPROTO_IGRP                      = 0x58
-	IPPROTO_IL                        = 0x28
-	IPPROTO_INLSP                     = 0x34
-	IPPROTO_INP                       = 0x20
-	IPPROTO_IP                        = 0x0
-	IPPROTO_IPCOMP                    = 0x6c
-	IPPROTO_IPCV                      = 0x47
-	IPPROTO_IPEIP                     = 0x5e
-	IPPROTO_IPIP                      = 0x4
-	IPPROTO_IPPC                      = 0x43
-	IPPROTO_IPV4                      = 0x4
-	IPPROTO_IPV6                      = 0x29
-	IPPROTO_IRTP                      = 0x1c
-	IPPROTO_KRYPTOLAN                 = 0x41
-	IPPROTO_LARP                      = 0x5b
-	IPPROTO_LEAF1                     = 0x19
-	IPPROTO_LEAF2                     = 0x1a
-	IPPROTO_MAX                       = 0x100
-	IPPROTO_MAXID                     = 0x34
-	IPPROTO_MEAS                      = 0x13
-	IPPROTO_MHRP                      = 0x30
-	IPPROTO_MICP                      = 0x5f
-	IPPROTO_MTP                       = 0x5c
-	IPPROTO_MUX                       = 0x12
-	IPPROTO_ND                        = 0x4d
-	IPPROTO_NHRP                      = 0x36
-	IPPROTO_NONE                      = 0x3b
-	IPPROTO_NSP                       = 0x1f
-	IPPROTO_NVPII                     = 0xb
-	IPPROTO_OSPFIGP                   = 0x59
-	IPPROTO_PGM                       = 0x71
-	IPPROTO_PIGP                      = 0x9
-	IPPROTO_PIM                       = 0x67
-	IPPROTO_PRM                       = 0x15
-	IPPROTO_PUP                       = 0xc
-	IPPROTO_PVP                       = 0x4b
-	IPPROTO_RAW                       = 0xff
-	IPPROTO_RCCMON                    = 0xa
-	IPPROTO_RDP                       = 0x1b
-	IPPROTO_ROUTING                   = 0x2b
-	IPPROTO_RSVP                      = 0x2e
-	IPPROTO_RVD                       = 0x42
-	IPPROTO_SATEXPAK                  = 0x40
-	IPPROTO_SATMON                    = 0x45
-	IPPROTO_SCCSP                     = 0x60
-	IPPROTO_SCTP                      = 0x84
-	IPPROTO_SDRP                      = 0x2a
-	IPPROTO_SEP                       = 0x21
-	IPPROTO_SRPC                      = 0x5a
-	IPPROTO_ST                        = 0x7
-	IPPROTO_SVMTP                     = 0x52
-	IPPROTO_SWIPE                     = 0x35
-	IPPROTO_TCF                       = 0x57
-	IPPROTO_TCP                       = 0x6
-	IPPROTO_TP                        = 0x1d
-	IPPROTO_TPXX                      = 0x27
-	IPPROTO_TRUNK1                    = 0x17
-	IPPROTO_TRUNK2                    = 0x18
-	IPPROTO_TTP                       = 0x54
-	IPPROTO_UDP                       = 0x11
-	IPPROTO_VINES                     = 0x53
-	IPPROTO_VISA                      = 0x46
-	IPPROTO_VMTP                      = 0x51
-	IPPROTO_WBEXPAK                   = 0x4f
-	IPPROTO_WBMON                     = 0x4e
-	IPPROTO_WSN                       = 0x4a
-	IPPROTO_XNET                      = 0xf
-	IPPROTO_XTP                       = 0x24
-	IPV6_2292DSTOPTS                  = 0x17
-	IPV6_2292HOPLIMIT                 = 0x14
-	IPV6_2292HOPOPTS                  = 0x16
-	IPV6_2292NEXTHOP                  = 0x15
-	IPV6_2292PKTINFO                  = 0x13
-	IPV6_2292PKTOPTIONS               = 0x19
-	IPV6_2292RTHDR                    = 0x18
-	IPV6_BINDV6ONLY                   = 0x1b
-	IPV6_BOUND_IF                     = 0x7d
-	IPV6_CHECKSUM                     = 0x1a
-	IPV6_DEFAULT_MULTICAST_HOPS       = 0x1
-	IPV6_DEFAULT_MULTICAST_LOOP       = 0x1
-	IPV6_DEFHLIM                      = 0x40
-	IPV6_FAITH                        = 0x1d
-	IPV6_FLOWINFO_MASK                = 0xffffff0f
-	IPV6_FLOWLABEL_MASK               = 0xffff0f00
-	IPV6_FLOW_ECN_MASK                = 0x300
-	IPV6_FRAGTTL                      = 0x3c
-	IPV6_FW_ADD                       = 0x1e
-	IPV6_FW_DEL                       = 0x1f
-	IPV6_FW_FLUSH                     = 0x20
-	IPV6_FW_GET                       = 0x22
-	IPV6_FW_ZERO                      = 0x21
-	IPV6_HLIMDEC                      = 0x1
-	IPV6_IPSEC_POLICY                 = 0x1c
-	IPV6_JOIN_GROUP                   = 0xc
-	IPV6_LEAVE_GROUP                  = 0xd
-	IPV6_MAXHLIM                      = 0xff
-	IPV6_MAXOPTHDR                    = 0x800
-	IPV6_MAXPACKET                    = 0xffff
-	IPV6_MAX_GROUP_SRC_FILTER         = 0x200
-	IPV6_MAX_MEMBERSHIPS              = 0xfff
-	IPV6_MAX_SOCK_SRC_FILTER          = 0x80
-	IPV6_MIN_MEMBERSHIPS              = 0x1f
-	IPV6_MMTU                         = 0x500
-	IPV6_MULTICAST_HOPS               = 0xa
-	IPV6_MULTICAST_IF                 = 0x9
-	IPV6_MULTICAST_LOOP               = 0xb
-	IPV6_PORTRANGE                    = 0xe
-	IPV6_PORTRANGE_DEFAULT            = 0x0
-	IPV6_PORTRANGE_HIGH               = 0x1
-	IPV6_PORTRANGE_LOW                = 0x2
-	IPV6_RECVTCLASS                   = 0x23
-	IPV6_RTHDR_LOOSE                  = 0x0
-	IPV6_RTHDR_STRICT                 = 0x1
-	IPV6_RTHDR_TYPE_0                 = 0x0
-	IPV6_SOCKOPT_RESERVED1            = 0x3
-	IPV6_TCLASS                       = 0x24
-	IPV6_UNICAST_HOPS                 = 0x4
-	IPV6_V6ONLY                       = 0x1b
-	IPV6_VERSION                      = 0x60
-	IPV6_VERSION_MASK                 = 0xf0
-	IP_ADD_MEMBERSHIP                 = 0xc
-	IP_ADD_SOURCE_MEMBERSHIP          = 0x46
-	IP_BLOCK_SOURCE                   = 0x48
-	IP_BOUND_IF                       = 0x19
-	IP_DEFAULT_MULTICAST_LOOP         = 0x1
-	IP_DEFAULT_MULTICAST_TTL          = 0x1
-	IP_DF                             = 0x4000
-	IP_DROP_MEMBERSHIP                = 0xd
-	IP_DROP_SOURCE_MEMBERSHIP         = 0x47
-	IP_DUMMYNET_CONFIGURE             = 0x3c
-	IP_DUMMYNET_DEL                   = 0x3d
-	IP_DUMMYNET_FLUSH                 = 0x3e
-	IP_DUMMYNET_GET                   = 0x40
-	IP_FAITH                          = 0x16
-	IP_FW_ADD                         = 0x28
-	IP_FW_DEL                         = 0x29
-	IP_FW_FLUSH                       = 0x2a
-	IP_FW_GET                         = 0x2c
-	IP_FW_RESETLOG                    = 0x2d
-	IP_FW_ZERO                        = 0x2b
-	IP_HDRINCL                        = 0x2
-	IP_IPSEC_POLICY                   = 0x15
-	IP_MAXPACKET                      = 0xffff
-	IP_MAX_GROUP_SRC_FILTER           = 0x200
-	IP_MAX_MEMBERSHIPS                = 0xfff
-	IP_MAX_SOCK_MUTE_FILTER           = 0x80
-	IP_MAX_SOCK_SRC_FILTER            = 0x80
-	IP_MF                             = 0x2000
-	IP_MIN_MEMBERSHIPS                = 0x1f
-	IP_MSFILTER                       = 0x4a
-	IP_MSS                            = 0x240
-	IP_MULTICAST_IF                   = 0x9
-	IP_MULTICAST_IFINDEX              = 0x42
-	IP_MULTICAST_LOOP                 = 0xb
-	IP_MULTICAST_TTL                  = 0xa
-	IP_MULTICAST_VIF                  = 0xe
-	IP_NAT__XXX                       = 0x37
-	IP_OFFMASK                        = 0x1fff
-	IP_OLD_FW_ADD                     = 0x32
-	IP_OLD_FW_DEL                     = 0x33
-	IP_OLD_FW_FLUSH                   = 0x34
-	IP_OLD_FW_GET                     = 0x36
-	IP_OLD_FW_RESETLOG                = 0x38
-	IP_OLD_FW_ZERO                    = 0x35
-	IP_OPTIONS                        = 0x1
-	IP_PKTINFO                        = 0x1a
-	IP_PORTRANGE                      = 0x13
-	IP_PORTRANGE_DEFAULT              = 0x0
-	IP_PORTRANGE_HIGH                 = 0x1
-	IP_PORTRANGE_LOW                  = 0x2
-	IP_RECVDSTADDR                    = 0x7
-	IP_RECVIF                         = 0x14
-	IP_RECVOPTS                       = 0x5
-	IP_RECVPKTINFO                    = 0x1a
-	IP_RECVRETOPTS                    = 0x6
-	IP_RECVTOS                        = 0x1b
-	IP_RECVTTL                        = 0x18
-	IP_RETOPTS                        = 0x8
-	IP_RF                             = 0x8000
-	IP_RSVP_OFF                       = 0x10
-	IP_RSVP_ON                        = 0xf
-	IP_RSVP_VIF_OFF                   = 0x12
-	IP_RSVP_VIF_ON                    = 0x11
-	IP_STRIPHDR                       = 0x17
-	IP_TOS                            = 0x3
-	IP_TRAFFIC_MGT_BACKGROUND         = 0x41
-	IP_TTL                            = 0x4
-	IP_UNBLOCK_SOURCE                 = 0x49
-	ISIG                              = 0x80
-	ISTRIP                            = 0x20
-	IUTF8                             = 0x4000
-	IXANY                             = 0x800
-	IXOFF                             = 0x400
-	IXON                              = 0x200
-	KERN_HOSTNAME                     = 0xa
-	KERN_OSRELEASE                    = 0x2
-	KERN_OSTYPE                       = 0x1
-	KERN_VERSION                      = 0x4
-	LOCK_EX                           = 0x2
-	LOCK_NB                           = 0x4
-	LOCK_SH                           = 0x1
-	LOCK_UN                           = 0x8
-	MADV_CAN_REUSE                    = 0x9
-	MADV_DONTNEED                     = 0x4
-	MADV_FREE                         = 0x5
-	MADV_FREE_REUSABLE                = 0x7
-	MADV_FREE_REUSE                   = 0x8
-	MADV_NORMAL                       = 0x0
-	MADV_PAGEOUT                      = 0xa
-	MADV_RANDOM                       = 0x1
-	MADV_SEQUENTIAL                   = 0x2
-	MADV_WILLNEED                     = 0x3
-	MADV_ZERO_WIRED_PAGES             = 0x6
-	MAP_ANON                          = 0x1000
-	MAP_ANONYMOUS                     = 0x1000
-	MAP_COPY                          = 0x2
-	MAP_FILE                          = 0x0
-	MAP_FIXED                         = 0x10
-	MAP_HASSEMAPHORE                  = 0x200
-	MAP_JIT                           = 0x800
-	MAP_NOCACHE                       = 0x400
-	MAP_NOEXTEND                      = 0x100
-	MAP_NORESERVE                     = 0x40
-	MAP_PRIVATE                       = 0x2
-	MAP_RENAME                        = 0x20
-	MAP_RESERVED0080                  = 0x80
-	MAP_RESILIENT_CODESIGN            = 0x2000
-	MAP_RESILIENT_MEDIA               = 0x4000
-	MAP_SHARED                        = 0x1
-	MCL_CURRENT                       = 0x1
-	MCL_FUTURE                        = 0x2
-	MNT_ASYNC                         = 0x40
-	MNT_AUTOMOUNTED                   = 0x400000
-	MNT_CMDFLAGS                      = 0xf0000
-	MNT_CPROTECT                      = 0x80
-	MNT_DEFWRITE                      = 0x2000000
-	MNT_DONTBROWSE                    = 0x100000
-	MNT_DOVOLFS                       = 0x8000
-	MNT_DWAIT                         = 0x4
-	MNT_EXPORTED                      = 0x100
-	MNT_FORCE                         = 0x80000
-	MNT_IGNORE_OWNERSHIP              = 0x200000
-	MNT_JOURNALED                     = 0x800000
-	MNT_LOCAL                         = 0x1000
-	MNT_MULTILABEL                    = 0x4000000
-	MNT_NOATIME                       = 0x10000000
-	MNT_NOBLOCK                       = 0x20000
-	MNT_NODEV                         = 0x10
-	MNT_NOEXEC                        = 0x4
-	MNT_NOSUID                        = 0x8
-	MNT_NOUSERXATTR                   = 0x1000000
-	MNT_NOWAIT                        = 0x2
-	MNT_QUARANTINE                    = 0x400
-	MNT_QUOTA                         = 0x2000
-	MNT_RDONLY                        = 0x1
-	MNT_RELOAD                        = 0x40000
-	MNT_ROOTFS                        = 0x4000
-	MNT_SYNCHRONOUS                   = 0x2
-	MNT_UNION                         = 0x20
-	MNT_UNKNOWNPERMISSIONS            = 0x200000
-	MNT_UPDATE                        = 0x10000
-	MNT_VISFLAGMASK                   = 0x17f0f5ff
-	MNT_WAIT                          = 0x1
-	MSG_CTRUNC                        = 0x20
-	MSG_DONTROUTE                     = 0x4
-	MSG_DONTWAIT                      = 0x80
-	MSG_EOF                           = 0x100
-	MSG_EOR                           = 0x8
-	MSG_FLUSH                         = 0x400
-	MSG_HAVEMORE                      = 0x2000
-	MSG_HOLD                          = 0x800
-	MSG_NEEDSA                        = 0x10000
-	MSG_OOB                           = 0x1
-	MSG_PEEK                          = 0x2
-	MSG_RCVMORE                       = 0x4000
-	MSG_SEND                          = 0x1000
-	MSG_TRUNC                         = 0x10
-	MSG_WAITALL                       = 0x40
-	MSG_WAITSTREAM                    = 0x200
-	MS_ASYNC                          = 0x1
-	MS_DEACTIVATE                     = 0x8
-	MS_INVALIDATE                     = 0x2
-	MS_KILLPAGES                      = 0x4
-	MS_SYNC                           = 0x10
-	NAME_MAX                          = 0xff
-	NET_RT_DUMP                       = 0x1
-	NET_RT_DUMP2                      = 0x7
-	NET_RT_FLAGS                      = 0x2
-	NET_RT_IFLIST                     = 0x3
-	NET_RT_IFLIST2                    = 0x6
-	NET_RT_MAXID                      = 0xa
-	NET_RT_STAT                       = 0x4
-	NET_RT_TRASH                      = 0x5
-	NFDBITS                           = 0x20
-	NL0                               = 0x0
-	NL1                               = 0x100
-	NL2                               = 0x200
-	NL3                               = 0x300
-	NLDLY                             = 0x300
-	NOFLSH                            = 0x80000000
-	NOKERNINFO                        = 0x2000000
-	NOTE_ABSOLUTE                     = 0x8
-	NOTE_ATTRIB                       = 0x8
-	NOTE_BACKGROUND                   = 0x40
-	NOTE_CHILD                        = 0x4
-	NOTE_CRITICAL                     = 0x20
-	NOTE_DELETE                       = 0x1
-	NOTE_EXEC                         = 0x20000000
-	NOTE_EXIT                         = 0x80000000
-	NOTE_EXITSTATUS                   = 0x4000000
-	NOTE_EXIT_CSERROR                 = 0x40000
-	NOTE_EXIT_DECRYPTFAIL             = 0x10000
-	NOTE_EXIT_DETAIL                  = 0x2000000
-	NOTE_EXIT_DETAIL_MASK             = 0x70000
-	NOTE_EXIT_MEMORY                  = 0x20000
-	NOTE_EXIT_REPARENTED              = 0x80000
-	NOTE_EXTEND                       = 0x4
-	NOTE_FFAND                        = 0x40000000
-	NOTE_FFCOPY                       = 0xc0000000
-	NOTE_FFCTRLMASK                   = 0xc0000000
-	NOTE_FFLAGSMASK                   = 0xffffff
-	NOTE_FFNOP                        = 0x0
-	NOTE_FFOR                         = 0x80000000
-	NOTE_FORK                         = 0x40000000
-	NOTE_FUNLOCK                      = 0x100
-	NOTE_LEEWAY                       = 0x10
-	NOTE_LINK                         = 0x10
-	NOTE_LOWAT                        = 0x1
-	NOTE_MACH_CONTINUOUS_TIME         = 0x80
-	NOTE_NONE                         = 0x80
-	NOTE_NSECONDS                     = 0x4
-	NOTE_OOB                          = 0x2
-	NOTE_PCTRLMASK                    = -0x100000
-	NOTE_PDATAMASK                    = 0xfffff
-	NOTE_REAP                         = 0x10000000
-	NOTE_RENAME                       = 0x20
-	NOTE_REVOKE                       = 0x40
-	NOTE_SECONDS                      = 0x1
-	NOTE_SIGNAL                       = 0x8000000
-	NOTE_TRACK                        = 0x1
-	NOTE_TRACKERR                     = 0x2
-	NOTE_TRIGGER                      = 0x1000000
-	NOTE_USECONDS                     = 0x2
-	NOTE_VM_ERROR                     = 0x10000000
-	NOTE_VM_PRESSURE                  = 0x80000000
-	NOTE_VM_PRESSURE_SUDDEN_TERMINATE = 0x20000000
-	NOTE_VM_PRESSURE_TERMINATE        = 0x40000000
-	NOTE_WRITE                        = 0x2
-	OCRNL                             = 0x10
-	OFDEL                             = 0x20000
-	OFILL                             = 0x80
-	ONLCR                             = 0x2
-	ONLRET                            = 0x40
-	ONOCR                             = 0x20
-	ONOEOT                            = 0x8
-	OPOST                             = 0x1
-	OXTABS                            = 0x4
-	O_ACCMODE                         = 0x3
-	O_ALERT                           = 0x20000000
-	O_APPEND                          = 0x8
-	O_ASYNC                           = 0x40
-	O_CLOEXEC                         = 0x1000000
-	O_CREAT                           = 0x200
-	O_DIRECTORY                       = 0x100000
-	O_DP_GETRAWENCRYPTED              = 0x1
-	O_DP_GETRAWUNENCRYPTED            = 0x2
-	O_DSYNC                           = 0x400000
-	O_EVTONLY                         = 0x8000
-	O_EXCL                            = 0x800
-	O_EXLOCK                          = 0x20
-	O_FSYNC                           = 0x80
-	O_NDELAY                          = 0x4
-	O_NOCTTY                          = 0x20000
-	O_NOFOLLOW                        = 0x100
-	O_NONBLOCK                        = 0x4
-	O_POPUP                           = 0x80000000
-	O_RDONLY                          = 0x0
-	O_RDWR                            = 0x2
-	O_SHLOCK                          = 0x10
-	O_SYMLINK                         = 0x200000
-	O_SYNC                            = 0x80
-	O_TRUNC                           = 0x400
-	O_WRONLY                          = 0x1
-	PARENB                            = 0x1000
-	PARMRK                            = 0x8
-	PARODD                            = 0x2000
-	PENDIN                            = 0x20000000
-	PRIO_PGRP                         = 0x1
-	PRIO_PROCESS                      = 0x0
-	PRIO_USER                         = 0x2
-	PROT_EXEC                         = 0x4
-	PROT_NONE                         = 0x0
-	PROT_READ                         = 0x1
-	PROT_WRITE                        = 0x2
-	PT_ATTACH                         = 0xa
-	PT_ATTACHEXC                      = 0xe
-	PT_CONTINUE                       = 0x7
-	PT_DENY_ATTACH                    = 0x1f
-	PT_DETACH                         = 0xb
-	PT_FIRSTMACH                      = 0x20
-	PT_FORCEQUOTA                     = 0x1e
-	PT_KILL                           = 0x8
-	PT_READ_D                         = 0x2
-	PT_READ_I                         = 0x1
-	PT_READ_U                         = 0x3
-	PT_SIGEXC                         = 0xc
-	PT_STEP                           = 0x9
-	PT_THUPDATE                       = 0xd
-	PT_TRACE_ME                       = 0x0
-	PT_WRITE_D                        = 0x5
-	PT_WRITE_I                        = 0x4
-	PT_WRITE_U                        = 0x6
-	RLIMIT_AS                         = 0x5
-	RLIMIT_CORE                       = 0x4
-	RLIMIT_CPU                        = 0x0
-	RLIMIT_CPU_USAGE_MONITOR          = 0x2
-	RLIMIT_DATA                       = 0x2
-	RLIMIT_FSIZE                      = 0x1
-	RLIMIT_MEMLOCK                    = 0x6
-	RLIMIT_NOFILE                     = 0x8
-	RLIMIT_NPROC                      = 0x7
-	RLIMIT_RSS                        = 0x5
-	RLIMIT_STACK                      = 0x3
-	RLIM_INFINITY                     = 0x7fffffffffffffff
-	RTAX_AUTHOR                       = 0x6
-	RTAX_BRD                          = 0x7
-	RTAX_DST                          = 0x0
-	RTAX_GATEWAY                      = 0x1
-	RTAX_GENMASK                      = 0x3
-	RTAX_IFA                          = 0x5
-	RTAX_IFP                          = 0x4
-	RTAX_MAX                          = 0x8
-	RTAX_NETMASK                      = 0x2
-	RTA_AUTHOR                        = 0x40
-	RTA_BRD                           = 0x80
-	RTA_DST                           = 0x1
-	RTA_GATEWAY                       = 0x2
-	RTA_GENMASK                       = 0x8
-	RTA_IFA                           = 0x20
-	RTA_IFP                           = 0x10
-	RTA_NETMASK                       = 0x4
-	RTF_BLACKHOLE                     = 0x1000
-	RTF_BROADCAST                     = 0x400000
-	RTF_CLONING                       = 0x100
-	RTF_CONDEMNED                     = 0x2000000
-	RTF_DELCLONE                      = 0x80
-	RTF_DONE                          = 0x40
-	RTF_DYNAMIC                       = 0x10
-	RTF_GATEWAY                       = 0x2
-	RTF_HOST                          = 0x4
-	RTF_IFREF                         = 0x4000000
-	RTF_IFSCOPE                       = 0x1000000
-	RTF_LLINFO                        = 0x400
-	RTF_LOCAL                         = 0x200000
-	RTF_MODIFIED                      = 0x20
-	RTF_MULTICAST                     = 0x800000
-	RTF_NOIFREF                       = 0x2000
-	RTF_PINNED                        = 0x100000
-	RTF_PRCLONING                     = 0x10000
-	RTF_PROTO1                        = 0x8000
-	RTF_PROTO2                        = 0x4000
-	RTF_PROTO3                        = 0x40000
-	RTF_PROXY                         = 0x8000000
-	RTF_REJECT                        = 0x8
-	RTF_ROUTER                        = 0x10000000
-	RTF_STATIC                        = 0x800
-	RTF_UP                            = 0x1
-	RTF_WASCLONED                     = 0x20000
-	RTF_XRESOLVE                      = 0x200
-	RTM_ADD                           = 0x1
-	RTM_CHANGE                        = 0x3
-	RTM_DELADDR                       = 0xd
-	RTM_DELETE                        = 0x2
-	RTM_DELMADDR                      = 0x10
-	RTM_GET                           = 0x4
-	RTM_GET2                          = 0x14
-	RTM_IFINFO                        = 0xe
-	RTM_IFINFO2                       = 0x12
-	RTM_LOCK                          = 0x8
-	RTM_LOSING                        = 0x5
-	RTM_MISS                          = 0x7
-	RTM_NEWADDR                       = 0xc
-	RTM_NEWMADDR                      = 0xf
-	RTM_NEWMADDR2                     = 0x13
-	RTM_OLDADD                        = 0x9
-	RTM_OLDDEL                        = 0xa
-	RTM_REDIRECT                      = 0x6
-	RTM_RESOLVE                       = 0xb
-	RTM_RTTUNIT                       = 0xf4240
-	RTM_VERSION                       = 0x5
-	RTV_EXPIRE                        = 0x4
-	RTV_HOPCOUNT                      = 0x2
-	RTV_MTU                           = 0x1
-	RTV_RPIPE                         = 0x8
-	RTV_RTT                           = 0x40
-	RTV_RTTVAR                        = 0x80
-	RTV_SPIPE                         = 0x10
-	RTV_SSTHRESH                      = 0x20
-	RUSAGE_CHILDREN                   = -0x1
-	RUSAGE_SELF                       = 0x0
-	SCM_CREDS                         = 0x3
-	SCM_RIGHTS                        = 0x1
-	SCM_TIMESTAMP                     = 0x2
-	SCM_TIMESTAMP_MONOTONIC           = 0x4
-	SHUT_RD                           = 0x0
-	SHUT_RDWR                         = 0x2
-	SHUT_WR                           = 0x1
-	SIOCADDMULTI                      = 0x80206931
-	SIOCAIFADDR                       = 0x8040691a
-	SIOCARPIPLL                       = 0xc0206928
-	SIOCATMARK                        = 0x40047307
-	SIOCAUTOADDR                      = 0xc0206926
-	SIOCAUTONETMASK                   = 0x80206927
-	SIOCDELMULTI                      = 0x80206932
-	SIOCDIFADDR                       = 0x80206919
-	SIOCDIFPHYADDR                    = 0x80206941
-	SIOCGDRVSPEC                      = 0xc028697b
-	SIOCGETVLAN                       = 0xc020697f
-	SIOCGHIWAT                        = 0x40047301
-	SIOCGIFADDR                       = 0xc0206921
-	SIOCGIFALTMTU                     = 0xc0206948
-	SIOCGIFASYNCMAP                   = 0xc020697c
-	SIOCGIFBOND                       = 0xc0206947
-	SIOCGIFBRDADDR                    = 0xc0206923
-	SIOCGIFCAP                        = 0xc020695b
-	SIOCGIFCONF                       = 0xc00c6924
-	SIOCGIFDEVMTU                     = 0xc0206944
-	SIOCGIFDSTADDR                    = 0xc0206922
-	SIOCGIFFLAGS                      = 0xc0206911
-	SIOCGIFGENERIC                    = 0xc020693a
-	SIOCGIFKPI                        = 0xc0206987
-	SIOCGIFMAC                        = 0xc0206982
-	SIOCGIFMEDIA                      = 0xc02c6938
-	SIOCGIFMETRIC                     = 0xc0206917
-	SIOCGIFMTU                        = 0xc0206933
-	SIOCGIFNETMASK                    = 0xc0206925
-	SIOCGIFPDSTADDR                   = 0xc0206940
-	SIOCGIFPHYS                       = 0xc0206935
-	SIOCGIFPSRCADDR                   = 0xc020693f
-	SIOCGIFSTATUS                     = 0xc331693d
-	SIOCGIFVLAN                       = 0xc020697f
-	SIOCGIFWAKEFLAGS                  = 0xc0206988
-	SIOCGLOWAT                        = 0x40047303
-	SIOCGPGRP                         = 0x40047309
-	SIOCIFCREATE                      = 0xc0206978
-	SIOCIFCREATE2                     = 0xc020697a
-	SIOCIFDESTROY                     = 0x80206979
-	SIOCIFGCLONERS                    = 0xc0106981
-	SIOCRSLVMULTI                     = 0xc010693b
-	SIOCSDRVSPEC                      = 0x8028697b
-	SIOCSETVLAN                       = 0x8020697e
-	SIOCSHIWAT                        = 0x80047300
-	SIOCSIFADDR                       = 0x8020690c
-	SIOCSIFALTMTU                     = 0x80206945
-	SIOCSIFASYNCMAP                   = 0x8020697d
-	SIOCSIFBOND                       = 0x80206946
-	SIOCSIFBRDADDR                    = 0x80206913
-	SIOCSIFCAP                        = 0x8020695a
-	SIOCSIFDSTADDR                    = 0x8020690e
-	SIOCSIFFLAGS                      = 0x80206910
-	SIOCSIFGENERIC                    = 0x80206939
-	SIOCSIFKPI                        = 0x80206986
-	SIOCSIFLLADDR                     = 0x8020693c
-	SIOCSIFMAC                        = 0x80206983
-	SIOCSIFMEDIA                      = 0xc0206937
-	SIOCSIFMETRIC                     = 0x80206918
-	SIOCSIFMTU                        = 0x80206934
-	SIOCSIFNETMASK                    = 0x80206916
-	SIOCSIFPHYADDR                    = 0x8040693e
-	SIOCSIFPHYS                       = 0x80206936
-	SIOCSIFVLAN                       = 0x8020697e
-	SIOCSLOWAT                        = 0x80047302
-	SIOCSPGRP                         = 0x80047308
-	SOCK_DGRAM                        = 0x2
-	SOCK_MAXADDRLEN                   = 0xff
-	SOCK_RAW                          = 0x3
-	SOCK_RDM                          = 0x4
-	SOCK_SEQPACKET                    = 0x5
-	SOCK_STREAM                       = 0x1
-	SOL_SOCKET                        = 0xffff
-	SOMAXCONN                         = 0x80
-	SO_ACCEPTCONN                     = 0x2
-	SO_BROADCAST                      = 0x20
-	SO_DEBUG                          = 0x1
-	SO_DONTROUTE                      = 0x10
-	SO_DONTTRUNC                      = 0x2000
-	SO_ERROR                          = 0x1007
-	SO_KEEPALIVE                      = 0x8
-	SO_LABEL                          = 0x1010
-	SO_LINGER                         = 0x80
-	SO_LINGER_SEC                     = 0x1080
-	SO_NETSVC_MARKING_LEVEL           = 0x1119
-	SO_NET_SERVICE_TYPE               = 0x1116
-	SO_NKE                            = 0x1021
-	SO_NOADDRERR                      = 0x1023
-	SO_NOSIGPIPE                      = 0x1022
-	SO_NOTIFYCONFLICT                 = 0x1026
-	SO_NP_EXTENSIONS                  = 0x1083
-	SO_NREAD                          = 0x1020
-	SO_NUMRCVPKT                      = 0x1112
-	SO_NWRITE                         = 0x1024
-	SO_OOBINLINE                      = 0x100
-	SO_PEERLABEL                      = 0x1011
-	SO_RANDOMPORT                     = 0x1082
-	SO_RCVBUF                         = 0x1002
-	SO_RCVLOWAT                       = 0x1004
-	SO_RCVTIMEO                       = 0x1006
-	SO_REUSEADDR                      = 0x4
-	SO_REUSEPORT                      = 0x200
-	SO_REUSESHAREUID                  = 0x1025
-	SO_SNDBUF                         = 0x1001
-	SO_SNDLOWAT                       = 0x1003
-	SO_SNDTIMEO                       = 0x1005
-	SO_TIMESTAMP                      = 0x400
-	SO_TIMESTAMP_MONOTONIC            = 0x800
-	SO_TYPE                           = 0x1008
-	SO_UPCALLCLOSEWAIT                = 0x1027
-	SO_USELOOPBACK                    = 0x40
-	SO_WANTMORE                       = 0x4000
-	SO_WANTOOBFLAG                    = 0x8000
-	S_IEXEC                           = 0x40
-	S_IFBLK                           = 0x6000
-	S_IFCHR                           = 0x2000
-	S_IFDIR                           = 0x4000
-	S_IFIFO                           = 0x1000
-	S_IFLNK                           = 0xa000
-	S_IFMT                            = 0xf000
-	S_IFREG                           = 0x8000
-	S_IFSOCK                          = 0xc000
-	S_IFWHT                           = 0xe000
-	S_IREAD                           = 0x100
-	S_IRGRP                           = 0x20
-	S_IROTH                           = 0x4
-	S_IRUSR                           = 0x100
-	S_IRWXG                           = 0x38
-	S_IRWXO                           = 0x7
-	S_IRWXU                           = 0x1c0
-	S_ISGID                           = 0x400
-	S_ISTXT                           = 0x200
-	S_ISUID                           = 0x800
-	S_ISVTX                           = 0x200
-	S_IWGRP                           = 0x10
-	S_IWOTH                           = 0x2
-	S_IWRITE                          = 0x80
-	S_IWUSR                           = 0x80
-	S_IXGRP                           = 0x8
-	S_IXOTH                           = 0x1
-	S_IXUSR                           = 0x40
-	TAB0                              = 0x0
-	TAB1                              = 0x400
-	TAB2                              = 0x800
-	TAB3                              = 0x4
-	TABDLY                            = 0xc04
-	TCIFLUSH                          = 0x1
-	TCIOFF                            = 0x3
-	TCIOFLUSH                         = 0x3
-	TCION                             = 0x4
-	TCOFLUSH                          = 0x2
-	TCOOFF                            = 0x1
-	TCOON                             = 0x2
-	TCP_CONNECTIONTIMEOUT             = 0x20
-	TCP_CONNECTION_INFO               = 0x106
-	TCP_ENABLE_ECN                    = 0x104
-	TCP_FASTOPEN                      = 0x105
-	TCP_KEEPALIVE                     = 0x10
-	TCP_KEEPCNT                       = 0x102
-	TCP_KEEPINTVL                     = 0x101
-	TCP_MAXHLEN                       = 0x3c
-	TCP_MAXOLEN                       = 0x28
-	TCP_MAXSEG                        = 0x2
-	TCP_MAXWIN                        = 0xffff
-	TCP_MAX_SACK                      = 0x4
-	TCP_MAX_WINSHIFT                  = 0xe
-	TCP_MINMSS                        = 0xd8
-	TCP_MSS                           = 0x200
-	TCP_NODELAY                       = 0x1
-	TCP_NOOPT                         = 0x8
-	TCP_NOPUSH                        = 0x4
-	TCP_NOTSENT_LOWAT                 = 0x201
-	TCP_RXT_CONNDROPTIME              = 0x80
-	TCP_RXT_FINDROP                   = 0x100
-	TCP_SENDMOREACKS                  = 0x103
-	TCSAFLUSH                         = 0x2
-	TIOCCBRK                          = 0x2000747a
-	TIOCCDTR                          = 0x20007478
-	TIOCCONS                          = 0x80047462
-	TIOCDCDTIMESTAMP                  = 0x40107458
-	TIOCDRAIN                         = 0x2000745e
-	TIOCDSIMICROCODE                  = 0x20007455
-	TIOCEXCL                          = 0x2000740d
-	TIOCEXT                           = 0x80047460
-	TIOCFLUSH                         = 0x80047410
-	TIOCGDRAINWAIT                    = 0x40047456
-	TIOCGETA                          = 0x40487413
-	TIOCGETD                          = 0x4004741a
-	TIOCGPGRP                         = 0x40047477
-	TIOCGWINSZ                        = 0x40087468
-	TIOCIXOFF                         = 0x20007480
-	TIOCIXON                          = 0x20007481
-	TIOCMBIC                          = 0x8004746b
-	TIOCMBIS                          = 0x8004746c
-	TIOCMGDTRWAIT                     = 0x4004745a
-	TIOCMGET                          = 0x4004746a
-	TIOCMODG                          = 0x40047403
-	TIOCMODS                          = 0x80047404
-	TIOCMSDTRWAIT                     = 0x8004745b
-	TIOCMSET                          = 0x8004746d
-	TIOCM_CAR                         = 0x40
-	TIOCM_CD                          = 0x40
-	TIOCM_CTS                         = 0x20
-	TIOCM_DSR                         = 0x100
-	TIOCM_DTR                         = 0x2
-	TIOCM_LE                          = 0x1
-	TIOCM_RI                          = 0x80
-	TIOCM_RNG                         = 0x80
-	TIOCM_RTS                         = 0x4
-	TIOCM_SR                          = 0x10
-	TIOCM_ST                          = 0x8
-	TIOCNOTTY                         = 0x20007471
-	TIOCNXCL                          = 0x2000740e
-	TIOCOUTQ                          = 0x40047473
-	TIOCPKT                           = 0x80047470
-	TIOCPKT_DATA                      = 0x0
-	TIOCPKT_DOSTOP                    = 0x20
-	TIOCPKT_FLUSHREAD                 = 0x1
-	TIOCPKT_FLUSHWRITE                = 0x2
-	TIOCPKT_IOCTL                     = 0x40
-	TIOCPKT_NOSTOP                    = 0x10
-	TIOCPKT_START                     = 0x8
-	TIOCPKT_STOP                      = 0x4
-	TIOCPTYGNAME                      = 0x40807453
-	TIOCPTYGRANT                      = 0x20007454
-	TIOCPTYUNLK                       = 0x20007452
-	TIOCREMOTE                        = 0x80047469
-	TIOCSBRK                          = 0x2000747b
-	TIOCSCONS                         = 0x20007463
-	TIOCSCTTY                         = 0x20007461
-	TIOCSDRAINWAIT                    = 0x80047457
-	TIOCSDTR                          = 0x20007479
-	TIOCSETA                          = 0x80487414
-	TIOCSETAF                         = 0x80487416
-	TIOCSETAW                         = 0x80487415
-	TIOCSETD                          = 0x8004741b
-	TIOCSIG                           = 0x2000745f
-	TIOCSPGRP                         = 0x80047476
-	TIOCSTART                         = 0x2000746e
-	TIOCSTAT                          = 0x20007465
-	TIOCSTI                           = 0x80017472
-	TIOCSTOP                          = 0x2000746f
-	TIOCSWINSZ                        = 0x80087467
-	TIOCTIMESTAMP                     = 0x40107459
-	TIOCUCNTL                         = 0x80047466
-	TOSTOP                            = 0x400000
-	VDISCARD                          = 0xf
-	VDSUSP                            = 0xb
-	VEOF                              = 0x0
-	VEOL                              = 0x1
-	VEOL2                             = 0x2
-	VERASE                            = 0x3
-	VINTR                             = 0x8
-	VKILL                             = 0x5
-	VLNEXT                            = 0xe
-	VMIN                              = 0x10
-	VM_LOADAVG                        = 0x2
-	VM_MACHFACTOR                     = 0x4
-	VM_MAXID                          = 0x6
-	VM_METER                          = 0x1
-	VM_SWAPUSAGE                      = 0x5
-	VQUIT                             = 0x9
-	VREPRINT                          = 0x6
-	VSTART                            = 0xc
-	VSTATUS                           = 0x12
-	VSTOP                             = 0xd
-	VSUSP                             = 0xa
-	VT0                               = 0x0
-	VT1                               = 0x10000
-	VTDLY                             = 0x10000
-	VTIME                             = 0x11
-	VWERASE                           = 0x4
-	WCONTINUED                        = 0x10
-	WCOREFLAG                         = 0x80
-	WEXITED                           = 0x4
-	WNOHANG                           = 0x1
-	WNOWAIT                           = 0x20
-	WORDSIZE                          = 0x40
-	WSTOPPED                          = 0x8
-	WUNTRACED                         = 0x2
-	XATTR_CREATE                      = 0x2
-	XATTR_NODEFAULT                   = 0x10
-	XATTR_NOFOLLOW                    = 0x1
-	XATTR_NOSECURITY                  = 0x8
-	XATTR_REPLACE                     = 0x4
-	XATTR_SHOWCOMPRESSION             = 0x20
-)
-
-// Errors
-const (
-	E2BIG           = syscall.Errno(0x7)
-	EACCES          = syscall.Errno(0xd)
-	EADDRINUSE      = syscall.Errno(0x30)
-	EADDRNOTAVAIL   = syscall.Errno(0x31)
-	EAFNOSUPPORT    = syscall.Errno(0x2f)
-	EAGAIN          = syscall.Errno(0x23)
-	EALREADY        = syscall.Errno(0x25)
-	EAUTH           = syscall.Errno(0x50)
-	EBADARCH        = syscall.Errno(0x56)
-	EBADEXEC        = syscall.Errno(0x55)
-	EBADF           = syscall.Errno(0x9)
-	EBADMACHO       = syscall.Errno(0x58)
-	EBADMSG         = syscall.Errno(0x5e)
-	EBADRPC         = syscall.Errno(0x48)
-	EBUSY           = syscall.Errno(0x10)
-	ECANCELED       = syscall.Errno(0x59)
-	ECHILD          = syscall.Errno(0xa)
-	ECONNABORTED    = syscall.Errno(0x35)
-	ECONNREFUSED    = syscall.Errno(0x3d)
-	ECONNRESET      = syscall.Errno(0x36)
-	EDEADLK         = syscall.Errno(0xb)
-	EDESTADDRREQ    = syscall.Errno(0x27)
-	EDEVERR         = syscall.Errno(0x53)
-	EDOM            = syscall.Errno(0x21)
-	EDQUOT          = syscall.Errno(0x45)
-	EEXIST          = syscall.Errno(0x11)
-	EFAULT          = syscall.Errno(0xe)
-	EFBIG           = syscall.Errno(0x1b)
-	EFTYPE          = syscall.Errno(0x4f)
-	EHOSTDOWN       = syscall.Errno(0x40)
-	EHOSTUNREACH    = syscall.Errno(0x41)
-	EIDRM           = syscall.Errno(0x5a)
-	EILSEQ          = syscall.Errno(0x5c)
-	EINPROGRESS     = syscall.Errno(0x24)
-	EINTR           = syscall.Errno(0x4)
-	EINVAL          = syscall.Errno(0x16)
-	EIO             = syscall.Errno(0x5)
-	EISCONN         = syscall.Errno(0x38)
-	EISDIR          = syscall.Errno(0x15)
-	ELAST           = syscall.Errno(0x6a)
-	ELOOP           = syscall.Errno(0x3e)
-	EMFILE          = syscall.Errno(0x18)
-	EMLINK          = syscall.Errno(0x1f)
-	EMSGSIZE        = syscall.Errno(0x28)
-	EMULTIHOP       = syscall.Errno(0x5f)
-	ENAMETOOLONG    = syscall.Errno(0x3f)
-	ENEEDAUTH       = syscall.Errno(0x51)
-	ENETDOWN        = syscall.Errno(0x32)
-	ENETRESET       = syscall.Errno(0x34)
-	ENETUNREACH     = syscall.Errno(0x33)
-	ENFILE          = syscall.Errno(0x17)
-	ENOATTR         = syscall.Errno(0x5d)
-	ENOBUFS         = syscall.Errno(0x37)
-	ENODATA         = syscall.Errno(0x60)
-	ENODEV          = syscall.Errno(0x13)
-	ENOENT          = syscall.Errno(0x2)
-	ENOEXEC         = syscall.Errno(0x8)
-	ENOLCK          = syscall.Errno(0x4d)
-	ENOLINK         = syscall.Errno(0x61)
-	ENOMEM          = syscall.Errno(0xc)
-	ENOMSG          = syscall.Errno(0x5b)
-	ENOPOLICY       = syscall.Errno(0x67)
-	ENOPROTOOPT     = syscall.Errno(0x2a)
-	ENOSPC          = syscall.Errno(0x1c)
-	ENOSR           = syscall.Errno(0x62)
-	ENOSTR          = syscall.Errno(0x63)
-	ENOSYS          = syscall.Errno(0x4e)
-	ENOTBLK         = syscall.Errno(0xf)
-	ENOTCONN        = syscall.Errno(0x39)
-	ENOTDIR         = syscall.Errno(0x14)
-	ENOTEMPTY       = syscall.Errno(0x42)
-	ENOTRECOVERABLE = syscall.Errno(0x68)
-	ENOTSOCK        = syscall.Errno(0x26)
-	ENOTSUP         = syscall.Errno(0x2d)
-	ENOTTY          = syscall.Errno(0x19)
-	ENXIO           = syscall.Errno(0x6)
-	EOPNOTSUPP      = syscall.Errno(0x66)
-	EOVERFLOW       = syscall.Errno(0x54)
-	EOWNERDEAD      = syscall.Errno(0x69)
-	EPERM           = syscall.Errno(0x1)
-	EPFNOSUPPORT    = syscall.Errno(0x2e)
-	EPIPE           = syscall.Errno(0x20)
-	EPROCLIM        = syscall.Errno(0x43)
-	EPROCUNAVAIL    = syscall.Errno(0x4c)
-	EPROGMISMATCH   = syscall.Errno(0x4b)
-	EPROGUNAVAIL    = syscall.Errno(0x4a)
-	EPROTO          = syscall.Errno(0x64)
-	EPROTONOSUPPORT = syscall.Errno(0x2b)
-	EPROTOTYPE      = syscall.Errno(0x29)
-	EPWROFF         = syscall.Errno(0x52)
-	EQFULL          = syscall.Errno(0x6a)
-	ERANGE          = syscall.Errno(0x22)
-	EREMOTE         = syscall.Errno(0x47)
-	EROFS           = syscall.Errno(0x1e)
-	ERPCMISMATCH    = syscall.Errno(0x49)
-	ESHLIBVERS      = syscall.Errno(0x57)
-	ESHUTDOWN       = syscall.Errno(0x3a)
-	ESOCKTNOSUPPORT = syscall.Errno(0x2c)
-	ESPIPE          = syscall.Errno(0x1d)
-	ESRCH           = syscall.Errno(0x3)
-	ESTALE          = syscall.Errno(0x46)
-	ETIME           = syscall.Errno(0x65)
-	ETIMEDOUT       = syscall.Errno(0x3c)
-	ETOOMANYREFS    = syscall.Errno(0x3b)
-	ETXTBSY         = syscall.Errno(0x1a)
-	EUSERS          = syscall.Errno(0x44)
-	EWOULDBLOCK     = syscall.Errno(0x23)
-	EXDEV           = syscall.Errno(0x12)
-)
-
-// Signals
-const (
-	SIGABRT   = syscall.Signal(0x6)
-	SIGALRM   = syscall.Signal(0xe)
-	SIGBUS    = syscall.Signal(0xa)
-	SIGCHLD   = syscall.Signal(0x14)
-	SIGCONT   = syscall.Signal(0x13)
-	SIGEMT    = syscall.Signal(0x7)
-	SIGFPE    = syscall.Signal(0x8)
-	SIGHUP    = syscall.Signal(0x1)
-	SIGILL    = syscall.Signal(0x4)
-	SIGINFO   = syscall.Signal(0x1d)
-	SIGINT    = syscall.Signal(0x2)
-	SIGIO     = syscall.Signal(0x17)
-	SIGIOT    = syscall.Signal(0x6)
-	SIGKILL   = syscall.Signal(0x9)
-	SIGPIPE   = syscall.Signal(0xd)
-	SIGPROF   = syscall.Signal(0x1b)
-	SIGQUIT   = syscall.Signal(0x3)
-	SIGSEGV   = syscall.Signal(0xb)
-	SIGSTOP   = syscall.Signal(0x11)
-	SIGSYS    = syscall.Signal(0xc)
-	SIGTERM   = syscall.Signal(0xf)
-	SIGTRAP   = syscall.Signal(0x5)
-	SIGTSTP   = syscall.Signal(0x12)
-	SIGTTIN   = syscall.Signal(0x15)
-	SIGTTOU   = syscall.Signal(0x16)
-	SIGURG    = syscall.Signal(0x10)
-	SIGUSR1   = syscall.Signal(0x1e)
-	SIGUSR2   = syscall.Signal(0x1f)
-	SIGVTALRM = syscall.Signal(0x1a)
-	SIGWINCH  = syscall.Signal(0x1c)
-	SIGXCPU   = syscall.Signal(0x18)
-	SIGXFSZ   = syscall.Signal(0x19)
-)
-
-// Error table
-var errorList = [...]struct {
-	num  syscall.Errno
-	name string
-	desc string
-}{
-	{1, "EPERM", "operation not permitted"},
-	{2, "ENOENT", "no such file or directory"},
-	{3, "ESRCH", "no such process"},
-	{4, "EINTR", "interrupted system call"},
-	{5, "EIO", "input/output error"},
-	{6, "ENXIO", "device not configured"},
-	{7, "E2BIG", "argument list too long"},
-	{8, "ENOEXEC", "exec format error"},
-	{9, "EBADF", "bad file descriptor"},
-	{10, "ECHILD", "no child processes"},
-	{11, "EDEADLK", "resource deadlock avoided"},
-	{12, "ENOMEM", "cannot allocate memory"},
-	{13, "EACCES", "permission denied"},
-	{14, "EFAULT", "bad address"},
-	{15, "ENOTBLK", "block device required"},
-	{16, "EBUSY", "resource busy"},
-	{17, "EEXIST", "file exists"},
-	{18, "EXDEV", "cross-device link"},
-	{19, "ENODEV", "operation not supported by device"},
-	{20, "ENOTDIR", "not a directory"},
-	{21, "EISDIR", "is a directory"},
-	{22, "EINVAL", "invalid argument"},
-	{23, "ENFILE", "too many open files in system"},
-	{24, "EMFILE", "too many open files"},
-	{25, "ENOTTY", "inappropriate ioctl for device"},
-	{26, "ETXTBSY", "text file busy"},
-	{27, "EFBIG", "file too large"},
-	{28, "ENOSPC", "no space left on device"},
-	{29, "ESPIPE", "illegal seek"},
-	{30, "EROFS", "read-only file system"},
-	{31, "EMLINK", "too many links"},
-	{32, "EPIPE", "broken pipe"},
-	{33, "EDOM", "numerical argument out of domain"},
-	{34, "ERANGE", "result too large"},
-	{35, "EAGAIN", "resource temporarily unavailable"},
-	{36, "EINPROGRESS", "operation now in progress"},
-	{37, "EALREADY", "operation already in progress"},
-	{38, "ENOTSOCK", "socket operation on non-socket"},
-	{39, "EDESTADDRREQ", "destination address required"},
-	{40, "EMSGSIZE", "message too long"},
-	{41, "EPROTOTYPE", "protocol wrong type for socket"},
-	{42, "ENOPROTOOPT", "protocol not available"},
-	{43, "EPROTONOSUPPORT", "protocol not supported"},
-	{44, "ESOCKTNOSUPPORT", "socket type not supported"},
-	{45, "ENOTSUP", "operation not supported"},
-	{46, "EPFNOSUPPORT", "protocol family not supported"},
-	{47, "EAFNOSUPPORT", "address family not supported by protocol family"},
-	{48, "EADDRINUSE", "address already in use"},
-	{49, "EADDRNOTAVAIL", "can't assign requested address"},
-	{50, "ENETDOWN", "network is down"},
-	{51, "ENETUNREACH", "network is unreachable"},
-	{52, "ENETRESET", "network dropped connection on reset"},
-	{53, "ECONNABORTED", "software caused connection abort"},
-	{54, "ECONNRESET", "connection reset by peer"},
-	{55, "ENOBUFS", "no buffer space available"},
-	{56, "EISCONN", "socket is already connected"},
-	{57, "ENOTCONN", "socket is not connected"},
-	{58, "ESHUTDOWN", "can't send after socket shutdown"},
-	{59, "ETOOMANYREFS", "too many references: can't splice"},
-	{60, "ETIMEDOUT", "operation timed out"},
-	{61, "ECONNREFUSED", "connection refused"},
-	{62, "ELOOP", "too many levels of symbolic links"},
-	{63, "ENAMETOOLONG", "file name too long"},
-	{64, "EHOSTDOWN", "host is down"},
-	{65, "EHOSTUNREACH", "no route to host"},
-	{66, "ENOTEMPTY", "directory not empty"},
-	{67, "EPROCLIM", "too many processes"},
-	{68, "EUSERS", "too many users"},
-	{69, "EDQUOT", "disc quota exceeded"},
-	{70, "ESTALE", "stale NFS file handle"},
-	{71, "EREMOTE", "too many levels of remote in path"},
-	{72, "EBADRPC", "RPC struct is bad"},
-	{73, "ERPCMISMATCH", "RPC version wrong"},
-	{74, "EPROGUNAVAIL", "RPC prog. not avail"},
-	{75, "EPROGMISMATCH", "program version wrong"},
-	{76, "EPROCUNAVAIL", "bad procedure for program"},
-	{77, "ENOLCK", "no locks available"},
-	{78, "ENOSYS", "function not implemented"},
-	{79, "EFTYPE", "inappropriate file type or format"},
-	{80, "EAUTH", "authentication error"},
-	{81, "ENEEDAUTH", "need authenticator"},
-	{82, "EPWROFF", "device power is off"},
-	{83, "EDEVERR", "device error"},
-	{84, "EOVERFLOW", "value too large to be stored in data type"},
-	{85, "EBADEXEC", "bad executable (or shared library)"},
-	{86, "EBADARCH", "bad CPU type in executable"},
-	{87, "ESHLIBVERS", "shared library version mismatch"},
-	{88, "EBADMACHO", "malformed Mach-o file"},
-	{89, "ECANCELED", "operation canceled"},
-	{90, "EIDRM", "identifier removed"},
-	{91, "ENOMSG", "no message of desired type"},
-	{92, "EILSEQ", "illegal byte sequence"},
-	{93, "ENOATTR", "attribute not found"},
-	{94, "EBADMSG", "bad message"},
-	{95, "EMULTIHOP", "EMULTIHOP (Reserved)"},
-	{96, "ENODATA", "no message available on STREAM"},
-	{97, "ENOLINK", "ENOLINK (Reserved)"},
-	{98, "ENOSR", "no STREAM resources"},
-	{99, "ENOSTR", "not a STREAM"},
-	{100, "EPROTO", "protocol error"},
-	{101, "ETIME", "STREAM ioctl timeout"},
-	{102, "EOPNOTSUPP", "operation not supported on socket"},
-	{103, "ENOPOLICY", "policy not found"},
-	{104, "ENOTRECOVERABLE", "state not recoverable"},
-	{105, "EOWNERDEAD", "previous owner died"},
-	{106, "EQFULL", "interface output queue is full"},
-}
-
-// Signal table
-var signalList = [...]struct {
-	num  syscall.Signal
-	name string
-	desc string
-}{
-	{1, "SIGHUP", "hangup"},
-	{2, "SIGINT", "interrupt"},
-	{3, "SIGQUIT", "quit"},
-	{4, "SIGILL", "illegal instruction"},
-	{5, "SIGTRAP", "trace/BPT trap"},
-	{6, "SIGABRT", "abort trap"},
-	{7, "SIGEMT", "EMT trap"},
-	{8, "SIGFPE", "floating point exception"},
-	{9, "SIGKILL", "killed"},
-	{10, "SIGBUS", "bus error"},
-	{11, "SIGSEGV", "segmentation fault"},
-	{12, "SIGSYS", "bad system call"},
-	{13, "SIGPIPE", "broken pipe"},
-	{14, "SIGALRM", "alarm clock"},
-	{15, "SIGTERM", "terminated"},
-	{16, "SIGURG", "urgent I/O condition"},
-	{17, "SIGSTOP", "suspended (signal)"},
-	{18, "SIGTSTP", "suspended"},
-	{19, "SIGCONT", "continued"},
-	{20, "SIGCHLD", "child exited"},
-	{21, "SIGTTIN", "stopped (tty input)"},
-	{22, "SIGTTOU", "stopped (tty output)"},
-	{23, "SIGIO", "I/O possible"},
-	{24, "SIGXCPU", "cputime limit exceeded"},
-	{25, "SIGXFSZ", "filesize limit exceeded"},
-	{26, "SIGVTALRM", "virtual timer expired"},
-	{27, "SIGPROF", "profiling timer expired"},
-	{28, "SIGWINCH", "window size changes"},
-	{29, "SIGINFO", "information request"},
-	{30, "SIGUSR1", "user defined signal 1"},
-	{31, "SIGUSR2", "user defined signal 2"},
-}
diff --git a/src/cmd/vendor/golang.org/x/sys/unix/zsyscall_darwin_386.1_13.go b/src/cmd/vendor/golang.org/x/sys/unix/zsyscall_darwin_386.1_13.go
deleted file mode 100644
index 48a62e3906..0000000000
--- a/src/cmd/vendor/golang.org/x/sys/unix/zsyscall_darwin_386.1_13.go
+++ /dev/null
@@ -1,40 +0,0 @@
-// go run mksyscall.go -l32 -tags darwin,386,go1.13 syscall_darwin.1_13.go
-// Code generated by the command above; see README.md. DO NOT EDIT.
-
-//go:build darwin && 386 && go1.13
-// +build darwin,386,go1.13
-
-package unix
-
-import (
-	"syscall"
-	"unsafe"
-)
-
-var _ syscall.Errno
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func closedir(dir uintptr) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_closedir_trampoline), uintptr(dir), 0, 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_closedir_trampoline()
-
-//go:cgo_import_dynamic libc_closedir closedir "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func readdir_r(dir uintptr, entry *Dirent, result **Dirent) (res Errno) {
-	r0, _, _ := syscall_syscall(funcPC(libc_readdir_r_trampoline), uintptr(dir), uintptr(unsafe.Pointer(entry)), uintptr(unsafe.Pointer(result)))
-	res = Errno(r0)
-	return
-}
-
-func libc_readdir_r_trampoline()
-
-//go:cgo_import_dynamic libc_readdir_r readdir_r "/usr/lib/libSystem.B.dylib"
diff --git a/src/cmd/vendor/golang.org/x/sys/unix/zsyscall_darwin_386.1_13.s b/src/cmd/vendor/golang.org/x/sys/unix/zsyscall_darwin_386.1_13.s
deleted file mode 100644
index 1c73a1921d..0000000000
--- a/src/cmd/vendor/golang.org/x/sys/unix/zsyscall_darwin_386.1_13.s
+++ /dev/null
@@ -1,13 +0,0 @@
-// go run mkasm_darwin.go 386
-// Code generated by the command above; DO NOT EDIT.
-
-//go:build go1.13
-// +build go1.13
-
-#include "textflag.h"
-TEXT ·libc_fdopendir_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_fdopendir(SB)
-TEXT ·libc_closedir_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_closedir(SB)
-TEXT ·libc_readdir_r_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_readdir_r(SB)
diff --git a/src/cmd/vendor/golang.org/x/sys/unix/zsyscall_darwin_386.go b/src/cmd/vendor/golang.org/x/sys/unix/zsyscall_darwin_386.go
deleted file mode 100644
index a266636af6..0000000000
--- a/src/cmd/vendor/golang.org/x/sys/unix/zsyscall_darwin_386.go
+++ /dev/null
@@ -1,2431 +0,0 @@
-// go run mksyscall.go -l32 -tags darwin,386,go1.12 syscall_bsd.go syscall_darwin.go syscall_darwin_386.go
-// Code generated by the command above; see README.md. DO NOT EDIT.
-
-//go:build darwin && 386 && go1.12
-// +build darwin,386,go1.12
-
-package unix
-
-import (
-	"syscall"
-	"unsafe"
-)
-
-var _ syscall.Errno
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func getgroups(ngid int, gid *_Gid_t) (n int, err error) {
-	r0, _, e1 := syscall_rawSyscall(funcPC(libc_getgroups_trampoline), uintptr(ngid), uintptr(unsafe.Pointer(gid)), 0)
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_getgroups_trampoline()
-
-//go:cgo_import_dynamic libc_getgroups getgroups "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func setgroups(ngid int, gid *_Gid_t) (err error) {
-	_, _, e1 := syscall_rawSyscall(funcPC(libc_setgroups_trampoline), uintptr(ngid), uintptr(unsafe.Pointer(gid)), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_setgroups_trampoline()
-
-//go:cgo_import_dynamic libc_setgroups setgroups "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func wait4(pid int, wstatus *_C_int, options int, rusage *Rusage) (wpid int, err error) {
-	r0, _, e1 := syscall_syscall6(funcPC(libc_wait4_trampoline), uintptr(pid), uintptr(unsafe.Pointer(wstatus)), uintptr(options), uintptr(unsafe.Pointer(rusage)), 0, 0)
-	wpid = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_wait4_trampoline()
-
-//go:cgo_import_dynamic libc_wait4 wait4 "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func accept(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (fd int, err error) {
-	r0, _, e1 := syscall_syscall(funcPC(libc_accept_trampoline), uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)))
-	fd = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_accept_trampoline()
-
-//go:cgo_import_dynamic libc_accept accept "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_bind_trampoline), uintptr(s), uintptr(addr), uintptr(addrlen))
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_bind_trampoline()
-
-//go:cgo_import_dynamic libc_bind bind "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_connect_trampoline), uintptr(s), uintptr(addr), uintptr(addrlen))
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_connect_trampoline()
-
-//go:cgo_import_dynamic libc_connect connect "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func socket(domain int, typ int, proto int) (fd int, err error) {
-	r0, _, e1 := syscall_rawSyscall(funcPC(libc_socket_trampoline), uintptr(domain), uintptr(typ), uintptr(proto))
-	fd = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_socket_trampoline()
-
-//go:cgo_import_dynamic libc_socket socket "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error) {
-	_, _, e1 := syscall_syscall6(funcPC(libc_getsockopt_trampoline), uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(unsafe.Pointer(vallen)), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_getsockopt_trampoline()
-
-//go:cgo_import_dynamic libc_getsockopt getsockopt "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) (err error) {
-	_, _, e1 := syscall_syscall6(funcPC(libc_setsockopt_trampoline), uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(vallen), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_setsockopt_trampoline()
-
-//go:cgo_import_dynamic libc_setsockopt setsockopt "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func getpeername(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) {
-	_, _, e1 := syscall_rawSyscall(funcPC(libc_getpeername_trampoline), uintptr(fd), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)))
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_getpeername_trampoline()
-
-//go:cgo_import_dynamic libc_getpeername getpeername "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func getsockname(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) {
-	_, _, e1 := syscall_rawSyscall(funcPC(libc_getsockname_trampoline), uintptr(fd), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)))
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_getsockname_trampoline()
-
-//go:cgo_import_dynamic libc_getsockname getsockname "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Shutdown(s int, how int) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_shutdown_trampoline), uintptr(s), uintptr(how), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_shutdown_trampoline()
-
-//go:cgo_import_dynamic libc_shutdown shutdown "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func socketpair(domain int, typ int, proto int, fd *[2]int32) (err error) {
-	_, _, e1 := syscall_rawSyscall6(funcPC(libc_socketpair_trampoline), uintptr(domain), uintptr(typ), uintptr(proto), uintptr(unsafe.Pointer(fd)), 0, 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_socketpair_trampoline()
-
-//go:cgo_import_dynamic libc_socketpair socketpair "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func recvfrom(fd int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (n int, err error) {
-	var _p0 unsafe.Pointer
-	if len(p) > 0 {
-		_p0 = unsafe.Pointer(&p[0])
-	} else {
-		_p0 = unsafe.Pointer(&_zero)
-	}
-	r0, _, e1 := syscall_syscall6(funcPC(libc_recvfrom_trampoline), uintptr(fd), uintptr(_p0), uintptr(len(p)), uintptr(flags), uintptr(unsafe.Pointer(from)), uintptr(unsafe.Pointer(fromlen)))
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_recvfrom_trampoline()
-
-//go:cgo_import_dynamic libc_recvfrom recvfrom "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func sendto(s int, buf []byte, flags int, to unsafe.Pointer, addrlen _Socklen) (err error) {
-	var _p0 unsafe.Pointer
-	if len(buf) > 0 {
-		_p0 = unsafe.Pointer(&buf[0])
-	} else {
-		_p0 = unsafe.Pointer(&_zero)
-	}
-	_, _, e1 := syscall_syscall6(funcPC(libc_sendto_trampoline), uintptr(s), uintptr(_p0), uintptr(len(buf)), uintptr(flags), uintptr(to), uintptr(addrlen))
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_sendto_trampoline()
-
-//go:cgo_import_dynamic libc_sendto sendto "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func recvmsg(s int, msg *Msghdr, flags int) (n int, err error) {
-	r0, _, e1 := syscall_syscall(funcPC(libc_recvmsg_trampoline), uintptr(s), uintptr(unsafe.Pointer(msg)), uintptr(flags))
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_recvmsg_trampoline()
-
-//go:cgo_import_dynamic libc_recvmsg recvmsg "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func sendmsg(s int, msg *Msghdr, flags int) (n int, err error) {
-	r0, _, e1 := syscall_syscall(funcPC(libc_sendmsg_trampoline), uintptr(s), uintptr(unsafe.Pointer(msg)), uintptr(flags))
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_sendmsg_trampoline()
-
-//go:cgo_import_dynamic libc_sendmsg sendmsg "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func kevent(kq int, change unsafe.Pointer, nchange int, event unsafe.Pointer, nevent int, timeout *Timespec) (n int, err error) {
-	r0, _, e1 := syscall_syscall6(funcPC(libc_kevent_trampoline), uintptr(kq), uintptr(change), uintptr(nchange), uintptr(event), uintptr(nevent), uintptr(unsafe.Pointer(timeout)))
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_kevent_trampoline()
-
-//go:cgo_import_dynamic libc_kevent kevent "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func utimes(path string, timeval *[2]Timeval) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall(funcPC(libc_utimes_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(timeval)), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_utimes_trampoline()
-
-//go:cgo_import_dynamic libc_utimes utimes "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func futimes(fd int, timeval *[2]Timeval) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_futimes_trampoline), uintptr(fd), uintptr(unsafe.Pointer(timeval)), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_futimes_trampoline()
-
-//go:cgo_import_dynamic libc_futimes futimes "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func poll(fds *PollFd, nfds int, timeout int) (n int, err error) {
-	r0, _, e1 := syscall_syscall(funcPC(libc_poll_trampoline), uintptr(unsafe.Pointer(fds)), uintptr(nfds), uintptr(timeout))
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_poll_trampoline()
-
-//go:cgo_import_dynamic libc_poll poll "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Madvise(b []byte, behav int) (err error) {
-	var _p0 unsafe.Pointer
-	if len(b) > 0 {
-		_p0 = unsafe.Pointer(&b[0])
-	} else {
-		_p0 = unsafe.Pointer(&_zero)
-	}
-	_, _, e1 := syscall_syscall(funcPC(libc_madvise_trampoline), uintptr(_p0), uintptr(len(b)), uintptr(behav))
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_madvise_trampoline()
-
-//go:cgo_import_dynamic libc_madvise madvise "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Mlock(b []byte) (err error) {
-	var _p0 unsafe.Pointer
-	if len(b) > 0 {
-		_p0 = unsafe.Pointer(&b[0])
-	} else {
-		_p0 = unsafe.Pointer(&_zero)
-	}
-	_, _, e1 := syscall_syscall(funcPC(libc_mlock_trampoline), uintptr(_p0), uintptr(len(b)), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_mlock_trampoline()
-
-//go:cgo_import_dynamic libc_mlock mlock "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Mlockall(flags int) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_mlockall_trampoline), uintptr(flags), 0, 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_mlockall_trampoline()
-
-//go:cgo_import_dynamic libc_mlockall mlockall "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Mprotect(b []byte, prot int) (err error) {
-	var _p0 unsafe.Pointer
-	if len(b) > 0 {
-		_p0 = unsafe.Pointer(&b[0])
-	} else {
-		_p0 = unsafe.Pointer(&_zero)
-	}
-	_, _, e1 := syscall_syscall(funcPC(libc_mprotect_trampoline), uintptr(_p0), uintptr(len(b)), uintptr(prot))
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_mprotect_trampoline()
-
-//go:cgo_import_dynamic libc_mprotect mprotect "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Msync(b []byte, flags int) (err error) {
-	var _p0 unsafe.Pointer
-	if len(b) > 0 {
-		_p0 = unsafe.Pointer(&b[0])
-	} else {
-		_p0 = unsafe.Pointer(&_zero)
-	}
-	_, _, e1 := syscall_syscall(funcPC(libc_msync_trampoline), uintptr(_p0), uintptr(len(b)), uintptr(flags))
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_msync_trampoline()
-
-//go:cgo_import_dynamic libc_msync msync "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Munlock(b []byte) (err error) {
-	var _p0 unsafe.Pointer
-	if len(b) > 0 {
-		_p0 = unsafe.Pointer(&b[0])
-	} else {
-		_p0 = unsafe.Pointer(&_zero)
-	}
-	_, _, e1 := syscall_syscall(funcPC(libc_munlock_trampoline), uintptr(_p0), uintptr(len(b)), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_munlock_trampoline()
-
-//go:cgo_import_dynamic libc_munlock munlock "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Munlockall() (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_munlockall_trampoline), 0, 0, 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_munlockall_trampoline()
-
-//go:cgo_import_dynamic libc_munlockall munlockall "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func pipe(p *[2]int32) (err error) {
-	_, _, e1 := syscall_rawSyscall(funcPC(libc_pipe_trampoline), uintptr(unsafe.Pointer(p)), 0, 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_pipe_trampoline()
-
-//go:cgo_import_dynamic libc_pipe pipe "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func getxattr(path string, attr string, dest *byte, size int, position uint32, options int) (sz int, err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path)
-	if err != nil {
-		return
-	}
-	var _p1 *byte
-	_p1, err = BytePtrFromString(attr)
-	if err != nil {
-		return
-	}
-	r0, _, e1 := syscall_syscall6(funcPC(libc_getxattr_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), uintptr(unsafe.Pointer(dest)), uintptr(size), uintptr(position), uintptr(options))
-	sz = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_getxattr_trampoline()
-
-//go:cgo_import_dynamic libc_getxattr getxattr "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func fgetxattr(fd int, attr string, dest *byte, size int, position uint32, options int) (sz int, err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(attr)
-	if err != nil {
-		return
-	}
-	r0, _, e1 := syscall_syscall6(funcPC(libc_fgetxattr_trampoline), uintptr(fd), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(dest)), uintptr(size), uintptr(position), uintptr(options))
-	sz = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_fgetxattr_trampoline()
-
-//go:cgo_import_dynamic libc_fgetxattr fgetxattr "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func setxattr(path string, attr string, data *byte, size int, position uint32, options int) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path)
-	if err != nil {
-		return
-	}
-	var _p1 *byte
-	_p1, err = BytePtrFromString(attr)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall6(funcPC(libc_setxattr_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), uintptr(unsafe.Pointer(data)), uintptr(size), uintptr(position), uintptr(options))
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_setxattr_trampoline()
-
-//go:cgo_import_dynamic libc_setxattr setxattr "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func fsetxattr(fd int, attr string, data *byte, size int, position uint32, options int) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(attr)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall6(funcPC(libc_fsetxattr_trampoline), uintptr(fd), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(data)), uintptr(size), uintptr(position), uintptr(options))
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_fsetxattr_trampoline()
-
-//go:cgo_import_dynamic libc_fsetxattr fsetxattr "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func removexattr(path string, attr string, options int) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path)
-	if err != nil {
-		return
-	}
-	var _p1 *byte
-	_p1, err = BytePtrFromString(attr)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall(funcPC(libc_removexattr_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), uintptr(options))
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_removexattr_trampoline()
-
-//go:cgo_import_dynamic libc_removexattr removexattr "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func fremovexattr(fd int, attr string, options int) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(attr)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall(funcPC(libc_fremovexattr_trampoline), uintptr(fd), uintptr(unsafe.Pointer(_p0)), uintptr(options))
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_fremovexattr_trampoline()
-
-//go:cgo_import_dynamic libc_fremovexattr fremovexattr "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func listxattr(path string, dest *byte, size int, options int) (sz int, err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path)
-	if err != nil {
-		return
-	}
-	r0, _, e1 := syscall_syscall6(funcPC(libc_listxattr_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(dest)), uintptr(size), uintptr(options), 0, 0)
-	sz = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_listxattr_trampoline()
-
-//go:cgo_import_dynamic libc_listxattr listxattr "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func flistxattr(fd int, dest *byte, size int, options int) (sz int, err error) {
-	r0, _, e1 := syscall_syscall6(funcPC(libc_flistxattr_trampoline), uintptr(fd), uintptr(unsafe.Pointer(dest)), uintptr(size), uintptr(options), 0, 0)
-	sz = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_flistxattr_trampoline()
-
-//go:cgo_import_dynamic libc_flistxattr flistxattr "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func setattrlist(path *byte, list unsafe.Pointer, buf unsafe.Pointer, size uintptr, options int) (err error) {
-	_, _, e1 := syscall_syscall6(funcPC(libc_setattrlist_trampoline), uintptr(unsafe.Pointer(path)), uintptr(list), uintptr(buf), uintptr(size), uintptr(options), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_setattrlist_trampoline()
-
-//go:cgo_import_dynamic libc_setattrlist setattrlist "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func fcntl(fd int, cmd int, arg int) (val int, err error) {
-	r0, _, e1 := syscall_syscall(funcPC(libc_fcntl_trampoline), uintptr(fd), uintptr(cmd), uintptr(arg))
-	val = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_fcntl_trampoline()
-
-//go:cgo_import_dynamic libc_fcntl fcntl "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func kill(pid int, signum int, posix int) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_kill_trampoline), uintptr(pid), uintptr(signum), uintptr(posix))
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_kill_trampoline()
-
-//go:cgo_import_dynamic libc_kill kill "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func ioctl(fd int, req uint, arg uintptr) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_ioctl_trampoline), uintptr(fd), uintptr(req), uintptr(arg))
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_ioctl_trampoline()
-
-//go:cgo_import_dynamic libc_ioctl ioctl "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func sysctl(mib []_C_int, old *byte, oldlen *uintptr, new *byte, newlen uintptr) (err error) {
-	var _p0 unsafe.Pointer
-	if len(mib) > 0 {
-		_p0 = unsafe.Pointer(&mib[0])
-	} else {
-		_p0 = unsafe.Pointer(&_zero)
-	}
-	_, _, e1 := syscall_syscall6(funcPC(libc_sysctl_trampoline), uintptr(_p0), uintptr(len(mib)), uintptr(unsafe.Pointer(old)), uintptr(unsafe.Pointer(oldlen)), uintptr(unsafe.Pointer(new)), uintptr(newlen))
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_sysctl_trampoline()
-
-//go:cgo_import_dynamic libc_sysctl sysctl "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func sendfile(infd int, outfd int, offset int64, len *int64, hdtr unsafe.Pointer, flags int) (err error) {
-	_, _, e1 := syscall_syscall9(funcPC(libc_sendfile_trampoline), uintptr(infd), uintptr(outfd), uintptr(offset), uintptr(offset>>32), uintptr(unsafe.Pointer(len)), uintptr(hdtr), uintptr(flags), 0, 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_sendfile_trampoline()
-
-//go:cgo_import_dynamic libc_sendfile sendfile "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Access(path string, mode uint32) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall(funcPC(libc_access_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(mode), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_access_trampoline()
-
-//go:cgo_import_dynamic libc_access access "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Adjtime(delta *Timeval, olddelta *Timeval) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_adjtime_trampoline), uintptr(unsafe.Pointer(delta)), uintptr(unsafe.Pointer(olddelta)), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_adjtime_trampoline()
-
-//go:cgo_import_dynamic libc_adjtime adjtime "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Chdir(path string) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall(funcPC(libc_chdir_trampoline), uintptr(unsafe.Pointer(_p0)), 0, 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_chdir_trampoline()
-
-//go:cgo_import_dynamic libc_chdir chdir "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Chflags(path string, flags int) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall(funcPC(libc_chflags_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(flags), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_chflags_trampoline()
-
-//go:cgo_import_dynamic libc_chflags chflags "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Chmod(path string, mode uint32) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall(funcPC(libc_chmod_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(mode), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_chmod_trampoline()
-
-//go:cgo_import_dynamic libc_chmod chmod "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Chown(path string, uid int, gid int) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall(funcPC(libc_chown_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(uid), uintptr(gid))
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_chown_trampoline()
-
-//go:cgo_import_dynamic libc_chown chown "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Chroot(path string) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall(funcPC(libc_chroot_trampoline), uintptr(unsafe.Pointer(_p0)), 0, 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_chroot_trampoline()
-
-//go:cgo_import_dynamic libc_chroot chroot "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func ClockGettime(clockid int32, time *Timespec) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_clock_gettime_trampoline), uintptr(clockid), uintptr(unsafe.Pointer(time)), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_clock_gettime_trampoline()
-
-//go:cgo_import_dynamic libc_clock_gettime clock_gettime "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Close(fd int) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_close_trampoline), uintptr(fd), 0, 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_close_trampoline()
-
-//go:cgo_import_dynamic libc_close close "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Clonefile(src string, dst string, flags int) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(src)
-	if err != nil {
-		return
-	}
-	var _p1 *byte
-	_p1, err = BytePtrFromString(dst)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall(funcPC(libc_clonefile_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), uintptr(flags))
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_clonefile_trampoline()
-
-//go:cgo_import_dynamic libc_clonefile clonefile "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Clonefileat(srcDirfd int, src string, dstDirfd int, dst string, flags int) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(src)
-	if err != nil {
-		return
-	}
-	var _p1 *byte
-	_p1, err = BytePtrFromString(dst)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall6(funcPC(libc_clonefileat_trampoline), uintptr(srcDirfd), uintptr(unsafe.Pointer(_p0)), uintptr(dstDirfd), uintptr(unsafe.Pointer(_p1)), uintptr(flags), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_clonefileat_trampoline()
-
-//go:cgo_import_dynamic libc_clonefileat clonefileat "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Dup(fd int) (nfd int, err error) {
-	r0, _, e1 := syscall_syscall(funcPC(libc_dup_trampoline), uintptr(fd), 0, 0)
-	nfd = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_dup_trampoline()
-
-//go:cgo_import_dynamic libc_dup dup "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Dup2(from int, to int) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_dup2_trampoline), uintptr(from), uintptr(to), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_dup2_trampoline()
-
-//go:cgo_import_dynamic libc_dup2 dup2 "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Exchangedata(path1 string, path2 string, options int) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path1)
-	if err != nil {
-		return
-	}
-	var _p1 *byte
-	_p1, err = BytePtrFromString(path2)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall(funcPC(libc_exchangedata_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), uintptr(options))
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_exchangedata_trampoline()
-
-//go:cgo_import_dynamic libc_exchangedata exchangedata "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Exit(code int) {
-	syscall_syscall(funcPC(libc_exit_trampoline), uintptr(code), 0, 0)
-	return
-}
-
-func libc_exit_trampoline()
-
-//go:cgo_import_dynamic libc_exit exit "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Faccessat(dirfd int, path string, mode uint32, flags int) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall6(funcPC(libc_faccessat_trampoline), uintptr(dirfd), uintptr(unsafe.Pointer(_p0)), uintptr(mode), uintptr(flags), 0, 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_faccessat_trampoline()
-
-//go:cgo_import_dynamic libc_faccessat faccessat "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Fchdir(fd int) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_fchdir_trampoline), uintptr(fd), 0, 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_fchdir_trampoline()
-
-//go:cgo_import_dynamic libc_fchdir fchdir "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Fchflags(fd int, flags int) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_fchflags_trampoline), uintptr(fd), uintptr(flags), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_fchflags_trampoline()
-
-//go:cgo_import_dynamic libc_fchflags fchflags "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Fchmod(fd int, mode uint32) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_fchmod_trampoline), uintptr(fd), uintptr(mode), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_fchmod_trampoline()
-
-//go:cgo_import_dynamic libc_fchmod fchmod "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Fchmodat(dirfd int, path string, mode uint32, flags int) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall6(funcPC(libc_fchmodat_trampoline), uintptr(dirfd), uintptr(unsafe.Pointer(_p0)), uintptr(mode), uintptr(flags), 0, 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_fchmodat_trampoline()
-
-//go:cgo_import_dynamic libc_fchmodat fchmodat "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Fchown(fd int, uid int, gid int) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_fchown_trampoline), uintptr(fd), uintptr(uid), uintptr(gid))
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_fchown_trampoline()
-
-//go:cgo_import_dynamic libc_fchown fchown "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Fchownat(dirfd int, path string, uid int, gid int, flags int) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall6(funcPC(libc_fchownat_trampoline), uintptr(dirfd), uintptr(unsafe.Pointer(_p0)), uintptr(uid), uintptr(gid), uintptr(flags), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_fchownat_trampoline()
-
-//go:cgo_import_dynamic libc_fchownat fchownat "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Fclonefileat(srcDirfd int, dstDirfd int, dst string, flags int) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(dst)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall6(funcPC(libc_fclonefileat_trampoline), uintptr(srcDirfd), uintptr(dstDirfd), uintptr(unsafe.Pointer(_p0)), uintptr(flags), 0, 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_fclonefileat_trampoline()
-
-//go:cgo_import_dynamic libc_fclonefileat fclonefileat "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Flock(fd int, how int) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_flock_trampoline), uintptr(fd), uintptr(how), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_flock_trampoline()
-
-//go:cgo_import_dynamic libc_flock flock "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Fpathconf(fd int, name int) (val int, err error) {
-	r0, _, e1 := syscall_syscall(funcPC(libc_fpathconf_trampoline), uintptr(fd), uintptr(name), 0)
-	val = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_fpathconf_trampoline()
-
-//go:cgo_import_dynamic libc_fpathconf fpathconf "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Fsync(fd int) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_fsync_trampoline), uintptr(fd), 0, 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_fsync_trampoline()
-
-//go:cgo_import_dynamic libc_fsync fsync "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Ftruncate(fd int, length int64) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_ftruncate_trampoline), uintptr(fd), uintptr(length), uintptr(length>>32))
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_ftruncate_trampoline()
-
-//go:cgo_import_dynamic libc_ftruncate ftruncate "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Getcwd(buf []byte) (n int, err error) {
-	var _p0 unsafe.Pointer
-	if len(buf) > 0 {
-		_p0 = unsafe.Pointer(&buf[0])
-	} else {
-		_p0 = unsafe.Pointer(&_zero)
-	}
-	r0, _, e1 := syscall_syscall(funcPC(libc_getcwd_trampoline), uintptr(_p0), uintptr(len(buf)), 0)
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_getcwd_trampoline()
-
-//go:cgo_import_dynamic libc_getcwd getcwd "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Getdtablesize() (size int) {
-	r0, _, _ := syscall_syscall(funcPC(libc_getdtablesize_trampoline), 0, 0, 0)
-	size = int(r0)
-	return
-}
-
-func libc_getdtablesize_trampoline()
-
-//go:cgo_import_dynamic libc_getdtablesize getdtablesize "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Getegid() (egid int) {
-	r0, _, _ := syscall_rawSyscall(funcPC(libc_getegid_trampoline), 0, 0, 0)
-	egid = int(r0)
-	return
-}
-
-func libc_getegid_trampoline()
-
-//go:cgo_import_dynamic libc_getegid getegid "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Geteuid() (uid int) {
-	r0, _, _ := syscall_rawSyscall(funcPC(libc_geteuid_trampoline), 0, 0, 0)
-	uid = int(r0)
-	return
-}
-
-func libc_geteuid_trampoline()
-
-//go:cgo_import_dynamic libc_geteuid geteuid "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Getgid() (gid int) {
-	r0, _, _ := syscall_rawSyscall(funcPC(libc_getgid_trampoline), 0, 0, 0)
-	gid = int(r0)
-	return
-}
-
-func libc_getgid_trampoline()
-
-//go:cgo_import_dynamic libc_getgid getgid "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Getpgid(pid int) (pgid int, err error) {
-	r0, _, e1 := syscall_rawSyscall(funcPC(libc_getpgid_trampoline), uintptr(pid), 0, 0)
-	pgid = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_getpgid_trampoline()
-
-//go:cgo_import_dynamic libc_getpgid getpgid "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Getpgrp() (pgrp int) {
-	r0, _, _ := syscall_rawSyscall(funcPC(libc_getpgrp_trampoline), 0, 0, 0)
-	pgrp = int(r0)
-	return
-}
-
-func libc_getpgrp_trampoline()
-
-//go:cgo_import_dynamic libc_getpgrp getpgrp "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Getpid() (pid int) {
-	r0, _, _ := syscall_rawSyscall(funcPC(libc_getpid_trampoline), 0, 0, 0)
-	pid = int(r0)
-	return
-}
-
-func libc_getpid_trampoline()
-
-//go:cgo_import_dynamic libc_getpid getpid "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Getppid() (ppid int) {
-	r0, _, _ := syscall_rawSyscall(funcPC(libc_getppid_trampoline), 0, 0, 0)
-	ppid = int(r0)
-	return
-}
-
-func libc_getppid_trampoline()
-
-//go:cgo_import_dynamic libc_getppid getppid "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Getpriority(which int, who int) (prio int, err error) {
-	r0, _, e1 := syscall_syscall(funcPC(libc_getpriority_trampoline), uintptr(which), uintptr(who), 0)
-	prio = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_getpriority_trampoline()
-
-//go:cgo_import_dynamic libc_getpriority getpriority "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Getrlimit(which int, lim *Rlimit) (err error) {
-	_, _, e1 := syscall_rawSyscall(funcPC(libc_getrlimit_trampoline), uintptr(which), uintptr(unsafe.Pointer(lim)), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_getrlimit_trampoline()
-
-//go:cgo_import_dynamic libc_getrlimit getrlimit "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Getrusage(who int, rusage *Rusage) (err error) {
-	_, _, e1 := syscall_rawSyscall(funcPC(libc_getrusage_trampoline), uintptr(who), uintptr(unsafe.Pointer(rusage)), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_getrusage_trampoline()
-
-//go:cgo_import_dynamic libc_getrusage getrusage "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Getsid(pid int) (sid int, err error) {
-	r0, _, e1 := syscall_rawSyscall(funcPC(libc_getsid_trampoline), uintptr(pid), 0, 0)
-	sid = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_getsid_trampoline()
-
-//go:cgo_import_dynamic libc_getsid getsid "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Gettimeofday(tp *Timeval) (err error) {
-	_, _, e1 := syscall_rawSyscall(funcPC(libc_gettimeofday_trampoline), uintptr(unsafe.Pointer(tp)), 0, 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_gettimeofday_trampoline()
-
-//go:cgo_import_dynamic libc_gettimeofday gettimeofday "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Getuid() (uid int) {
-	r0, _, _ := syscall_rawSyscall(funcPC(libc_getuid_trampoline), 0, 0, 0)
-	uid = int(r0)
-	return
-}
-
-func libc_getuid_trampoline()
-
-//go:cgo_import_dynamic libc_getuid getuid "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Issetugid() (tainted bool) {
-	r0, _, _ := syscall_rawSyscall(funcPC(libc_issetugid_trampoline), 0, 0, 0)
-	tainted = bool(r0 != 0)
-	return
-}
-
-func libc_issetugid_trampoline()
-
-//go:cgo_import_dynamic libc_issetugid issetugid "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Kqueue() (fd int, err error) {
-	r0, _, e1 := syscall_syscall(funcPC(libc_kqueue_trampoline), 0, 0, 0)
-	fd = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_kqueue_trampoline()
-
-//go:cgo_import_dynamic libc_kqueue kqueue "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Lchown(path string, uid int, gid int) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall(funcPC(libc_lchown_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(uid), uintptr(gid))
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_lchown_trampoline()
-
-//go:cgo_import_dynamic libc_lchown lchown "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Link(path string, link string) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path)
-	if err != nil {
-		return
-	}
-	var _p1 *byte
-	_p1, err = BytePtrFromString(link)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall(funcPC(libc_link_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_link_trampoline()
-
-//go:cgo_import_dynamic libc_link link "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Linkat(pathfd int, path string, linkfd int, link string, flags int) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path)
-	if err != nil {
-		return
-	}
-	var _p1 *byte
-	_p1, err = BytePtrFromString(link)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall6(funcPC(libc_linkat_trampoline), uintptr(pathfd), uintptr(unsafe.Pointer(_p0)), uintptr(linkfd), uintptr(unsafe.Pointer(_p1)), uintptr(flags), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_linkat_trampoline()
-
-//go:cgo_import_dynamic libc_linkat linkat "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Listen(s int, backlog int) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_listen_trampoline), uintptr(s), uintptr(backlog), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_listen_trampoline()
-
-//go:cgo_import_dynamic libc_listen listen "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Mkdir(path string, mode uint32) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall(funcPC(libc_mkdir_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(mode), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_mkdir_trampoline()
-
-//go:cgo_import_dynamic libc_mkdir mkdir "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Mkdirat(dirfd int, path string, mode uint32) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall(funcPC(libc_mkdirat_trampoline), uintptr(dirfd), uintptr(unsafe.Pointer(_p0)), uintptr(mode))
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_mkdirat_trampoline()
-
-//go:cgo_import_dynamic libc_mkdirat mkdirat "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Mkfifo(path string, mode uint32) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall(funcPC(libc_mkfifo_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(mode), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_mkfifo_trampoline()
-
-//go:cgo_import_dynamic libc_mkfifo mkfifo "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Mknod(path string, mode uint32, dev int) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall(funcPC(libc_mknod_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(mode), uintptr(dev))
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_mknod_trampoline()
-
-//go:cgo_import_dynamic libc_mknod mknod "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Open(path string, mode int, perm uint32) (fd int, err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path)
-	if err != nil {
-		return
-	}
-	r0, _, e1 := syscall_syscall(funcPC(libc_open_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(mode), uintptr(perm))
-	fd = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_open_trampoline()
-
-//go:cgo_import_dynamic libc_open open "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Openat(dirfd int, path string, mode int, perm uint32) (fd int, err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path)
-	if err != nil {
-		return
-	}
-	r0, _, e1 := syscall_syscall6(funcPC(libc_openat_trampoline), uintptr(dirfd), uintptr(unsafe.Pointer(_p0)), uintptr(mode), uintptr(perm), 0, 0)
-	fd = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_openat_trampoline()
-
-//go:cgo_import_dynamic libc_openat openat "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Pathconf(path string, name int) (val int, err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path)
-	if err != nil {
-		return
-	}
-	r0, _, e1 := syscall_syscall(funcPC(libc_pathconf_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(name), 0)
-	val = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_pathconf_trampoline()
-
-//go:cgo_import_dynamic libc_pathconf pathconf "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Pread(fd int, p []byte, offset int64) (n int, err error) {
-	var _p0 unsafe.Pointer
-	if len(p) > 0 {
-		_p0 = unsafe.Pointer(&p[0])
-	} else {
-		_p0 = unsafe.Pointer(&_zero)
-	}
-	r0, _, e1 := syscall_syscall6(funcPC(libc_pread_trampoline), uintptr(fd), uintptr(_p0), uintptr(len(p)), uintptr(offset), uintptr(offset>>32), 0)
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_pread_trampoline()
-
-//go:cgo_import_dynamic libc_pread pread "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Pwrite(fd int, p []byte, offset int64) (n int, err error) {
-	var _p0 unsafe.Pointer
-	if len(p) > 0 {
-		_p0 = unsafe.Pointer(&p[0])
-	} else {
-		_p0 = unsafe.Pointer(&_zero)
-	}
-	r0, _, e1 := syscall_syscall6(funcPC(libc_pwrite_trampoline), uintptr(fd), uintptr(_p0), uintptr(len(p)), uintptr(offset), uintptr(offset>>32), 0)
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_pwrite_trampoline()
-
-//go:cgo_import_dynamic libc_pwrite pwrite "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func read(fd int, p []byte) (n int, err error) {
-	var _p0 unsafe.Pointer
-	if len(p) > 0 {
-		_p0 = unsafe.Pointer(&p[0])
-	} else {
-		_p0 = unsafe.Pointer(&_zero)
-	}
-	r0, _, e1 := syscall_syscall(funcPC(libc_read_trampoline), uintptr(fd), uintptr(_p0), uintptr(len(p)))
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_read_trampoline()
-
-//go:cgo_import_dynamic libc_read read "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Readlink(path string, buf []byte) (n int, err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path)
-	if err != nil {
-		return
-	}
-	var _p1 unsafe.Pointer
-	if len(buf) > 0 {
-		_p1 = unsafe.Pointer(&buf[0])
-	} else {
-		_p1 = unsafe.Pointer(&_zero)
-	}
-	r0, _, e1 := syscall_syscall(funcPC(libc_readlink_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(_p1), uintptr(len(buf)))
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_readlink_trampoline()
-
-//go:cgo_import_dynamic libc_readlink readlink "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Readlinkat(dirfd int, path string, buf []byte) (n int, err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path)
-	if err != nil {
-		return
-	}
-	var _p1 unsafe.Pointer
-	if len(buf) > 0 {
-		_p1 = unsafe.Pointer(&buf[0])
-	} else {
-		_p1 = unsafe.Pointer(&_zero)
-	}
-	r0, _, e1 := syscall_syscall6(funcPC(libc_readlinkat_trampoline), uintptr(dirfd), uintptr(unsafe.Pointer(_p0)), uintptr(_p1), uintptr(len(buf)), 0, 0)
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_readlinkat_trampoline()
-
-//go:cgo_import_dynamic libc_readlinkat readlinkat "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Rename(from string, to string) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(from)
-	if err != nil {
-		return
-	}
-	var _p1 *byte
-	_p1, err = BytePtrFromString(to)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall(funcPC(libc_rename_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_rename_trampoline()
-
-//go:cgo_import_dynamic libc_rename rename "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Renameat(fromfd int, from string, tofd int, to string) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(from)
-	if err != nil {
-		return
-	}
-	var _p1 *byte
-	_p1, err = BytePtrFromString(to)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall6(funcPC(libc_renameat_trampoline), uintptr(fromfd), uintptr(unsafe.Pointer(_p0)), uintptr(tofd), uintptr(unsafe.Pointer(_p1)), 0, 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_renameat_trampoline()
-
-//go:cgo_import_dynamic libc_renameat renameat "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Revoke(path string) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall(funcPC(libc_revoke_trampoline), uintptr(unsafe.Pointer(_p0)), 0, 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_revoke_trampoline()
-
-//go:cgo_import_dynamic libc_revoke revoke "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Rmdir(path string) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall(funcPC(libc_rmdir_trampoline), uintptr(unsafe.Pointer(_p0)), 0, 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_rmdir_trampoline()
-
-//go:cgo_import_dynamic libc_rmdir rmdir "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Seek(fd int, offset int64, whence int) (newoffset int64, err error) {
-	r0, r1, e1 := syscall_syscall6(funcPC(libc_lseek_trampoline), uintptr(fd), uintptr(offset), uintptr(offset>>32), uintptr(whence), 0, 0)
-	newoffset = int64(int64(r1)<<32 | int64(r0))
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_lseek_trampoline()
-
-//go:cgo_import_dynamic libc_lseek lseek "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error) {
-	r0, _, e1 := syscall_syscall6(funcPC(libc_select_trampoline), uintptr(nfd), uintptr(unsafe.Pointer(r)), uintptr(unsafe.Pointer(w)), uintptr(unsafe.Pointer(e)), uintptr(unsafe.Pointer(timeout)), 0)
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_select_trampoline()
-
-//go:cgo_import_dynamic libc_select select "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Setegid(egid int) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_setegid_trampoline), uintptr(egid), 0, 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_setegid_trampoline()
-
-//go:cgo_import_dynamic libc_setegid setegid "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Seteuid(euid int) (err error) {
-	_, _, e1 := syscall_rawSyscall(funcPC(libc_seteuid_trampoline), uintptr(euid), 0, 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_seteuid_trampoline()
-
-//go:cgo_import_dynamic libc_seteuid seteuid "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Setgid(gid int) (err error) {
-	_, _, e1 := syscall_rawSyscall(funcPC(libc_setgid_trampoline), uintptr(gid), 0, 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_setgid_trampoline()
-
-//go:cgo_import_dynamic libc_setgid setgid "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Setlogin(name string) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(name)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall(funcPC(libc_setlogin_trampoline), uintptr(unsafe.Pointer(_p0)), 0, 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_setlogin_trampoline()
-
-//go:cgo_import_dynamic libc_setlogin setlogin "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Setpgid(pid int, pgid int) (err error) {
-	_, _, e1 := syscall_rawSyscall(funcPC(libc_setpgid_trampoline), uintptr(pid), uintptr(pgid), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_setpgid_trampoline()
-
-//go:cgo_import_dynamic libc_setpgid setpgid "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Setpriority(which int, who int, prio int) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_setpriority_trampoline), uintptr(which), uintptr(who), uintptr(prio))
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_setpriority_trampoline()
-
-//go:cgo_import_dynamic libc_setpriority setpriority "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Setprivexec(flag int) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_setprivexec_trampoline), uintptr(flag), 0, 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_setprivexec_trampoline()
-
-//go:cgo_import_dynamic libc_setprivexec setprivexec "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Setregid(rgid int, egid int) (err error) {
-	_, _, e1 := syscall_rawSyscall(funcPC(libc_setregid_trampoline), uintptr(rgid), uintptr(egid), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_setregid_trampoline()
-
-//go:cgo_import_dynamic libc_setregid setregid "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Setreuid(ruid int, euid int) (err error) {
-	_, _, e1 := syscall_rawSyscall(funcPC(libc_setreuid_trampoline), uintptr(ruid), uintptr(euid), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_setreuid_trampoline()
-
-//go:cgo_import_dynamic libc_setreuid setreuid "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Setrlimit(which int, lim *Rlimit) (err error) {
-	_, _, e1 := syscall_rawSyscall(funcPC(libc_setrlimit_trampoline), uintptr(which), uintptr(unsafe.Pointer(lim)), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_setrlimit_trampoline()
-
-//go:cgo_import_dynamic libc_setrlimit setrlimit "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Setsid() (pid int, err error) {
-	r0, _, e1 := syscall_rawSyscall(funcPC(libc_setsid_trampoline), 0, 0, 0)
-	pid = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_setsid_trampoline()
-
-//go:cgo_import_dynamic libc_setsid setsid "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Settimeofday(tp *Timeval) (err error) {
-	_, _, e1 := syscall_rawSyscall(funcPC(libc_settimeofday_trampoline), uintptr(unsafe.Pointer(tp)), 0, 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_settimeofday_trampoline()
-
-//go:cgo_import_dynamic libc_settimeofday settimeofday "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Setuid(uid int) (err error) {
-	_, _, e1 := syscall_rawSyscall(funcPC(libc_setuid_trampoline), uintptr(uid), 0, 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_setuid_trampoline()
-
-//go:cgo_import_dynamic libc_setuid setuid "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Symlink(path string, link string) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path)
-	if err != nil {
-		return
-	}
-	var _p1 *byte
-	_p1, err = BytePtrFromString(link)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall(funcPC(libc_symlink_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_symlink_trampoline()
-
-//go:cgo_import_dynamic libc_symlink symlink "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Symlinkat(oldpath string, newdirfd int, newpath string) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(oldpath)
-	if err != nil {
-		return
-	}
-	var _p1 *byte
-	_p1, err = BytePtrFromString(newpath)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall(funcPC(libc_symlinkat_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(newdirfd), uintptr(unsafe.Pointer(_p1)))
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_symlinkat_trampoline()
-
-//go:cgo_import_dynamic libc_symlinkat symlinkat "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Sync() (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_sync_trampoline), 0, 0, 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_sync_trampoline()
-
-//go:cgo_import_dynamic libc_sync sync "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Truncate(path string, length int64) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall(funcPC(libc_truncate_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(length), uintptr(length>>32))
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_truncate_trampoline()
-
-//go:cgo_import_dynamic libc_truncate truncate "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Umask(newmask int) (oldmask int) {
-	r0, _, _ := syscall_syscall(funcPC(libc_umask_trampoline), uintptr(newmask), 0, 0)
-	oldmask = int(r0)
-	return
-}
-
-func libc_umask_trampoline()
-
-//go:cgo_import_dynamic libc_umask umask "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Undelete(path string) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall(funcPC(libc_undelete_trampoline), uintptr(unsafe.Pointer(_p0)), 0, 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_undelete_trampoline()
-
-//go:cgo_import_dynamic libc_undelete undelete "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Unlink(path string) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall(funcPC(libc_unlink_trampoline), uintptr(unsafe.Pointer(_p0)), 0, 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_unlink_trampoline()
-
-//go:cgo_import_dynamic libc_unlink unlink "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Unlinkat(dirfd int, path string, flags int) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall(funcPC(libc_unlinkat_trampoline), uintptr(dirfd), uintptr(unsafe.Pointer(_p0)), uintptr(flags))
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_unlinkat_trampoline()
-
-//go:cgo_import_dynamic libc_unlinkat unlinkat "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Unmount(path string, flags int) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall(funcPC(libc_unmount_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(flags), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_unmount_trampoline()
-
-//go:cgo_import_dynamic libc_unmount unmount "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func write(fd int, p []byte) (n int, err error) {
-	var _p0 unsafe.Pointer
-	if len(p) > 0 {
-		_p0 = unsafe.Pointer(&p[0])
-	} else {
-		_p0 = unsafe.Pointer(&_zero)
-	}
-	r0, _, e1 := syscall_syscall(funcPC(libc_write_trampoline), uintptr(fd), uintptr(_p0), uintptr(len(p)))
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_write_trampoline()
-
-//go:cgo_import_dynamic libc_write write "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func mmap(addr uintptr, length uintptr, prot int, flag int, fd int, pos int64) (ret uintptr, err error) {
-	r0, _, e1 := syscall_syscall9(funcPC(libc_mmap_trampoline), uintptr(addr), uintptr(length), uintptr(prot), uintptr(flag), uintptr(fd), uintptr(pos), uintptr(pos>>32), 0, 0)
-	ret = uintptr(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_mmap_trampoline()
-
-//go:cgo_import_dynamic libc_mmap mmap "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func munmap(addr uintptr, length uintptr) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_munmap_trampoline), uintptr(addr), uintptr(length), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_munmap_trampoline()
-
-//go:cgo_import_dynamic libc_munmap munmap "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func readlen(fd int, buf *byte, nbuf int) (n int, err error) {
-	r0, _, e1 := syscall_syscall(funcPC(libc_read_trampoline), uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf))
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func writelen(fd int, buf *byte, nbuf int) (n int, err error) {
-	r0, _, e1 := syscall_syscall(funcPC(libc_write_trampoline), uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf))
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Fstat(fd int, stat *Stat_t) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_fstat64_trampoline), uintptr(fd), uintptr(unsafe.Pointer(stat)), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_fstat64_trampoline()
-
-//go:cgo_import_dynamic libc_fstat64 fstat64 "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Fstatat(fd int, path string, stat *Stat_t, flags int) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall6(funcPC(libc_fstatat64_trampoline), uintptr(fd), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(stat)), uintptr(flags), 0, 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_fstatat64_trampoline()
-
-//go:cgo_import_dynamic libc_fstatat64 fstatat64 "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Fstatfs(fd int, stat *Statfs_t) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_fstatfs64_trampoline), uintptr(fd), uintptr(unsafe.Pointer(stat)), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_fstatfs64_trampoline()
-
-//go:cgo_import_dynamic libc_fstatfs64 fstatfs64 "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func getfsstat(buf unsafe.Pointer, size uintptr, flags int) (n int, err error) {
-	r0, _, e1 := syscall_syscall(funcPC(libc_getfsstat64_trampoline), uintptr(buf), uintptr(size), uintptr(flags))
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_getfsstat64_trampoline()
-
-//go:cgo_import_dynamic libc_getfsstat64 getfsstat64 "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Lstat(path string, stat *Stat_t) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall(funcPC(libc_lstat64_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(stat)), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_lstat64_trampoline()
-
-//go:cgo_import_dynamic libc_lstat64 lstat64 "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func ptrace1(request int, pid int, addr uintptr, data uintptr) (err error) {
-	_, _, e1 := syscall_syscall6(funcPC(libc_ptrace_trampoline), uintptr(request), uintptr(pid), uintptr(addr), uintptr(data), 0, 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_ptrace_trampoline()
-
-//go:cgo_import_dynamic libc_ptrace ptrace "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Stat(path string, stat *Stat_t) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall(funcPC(libc_stat64_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(stat)), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_stat64_trampoline()
-
-//go:cgo_import_dynamic libc_stat64 stat64 "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Statfs(path string, stat *Statfs_t) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall(funcPC(libc_statfs64_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(stat)), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_statfs64_trampoline()
-
-//go:cgo_import_dynamic libc_statfs64 statfs64 "/usr/lib/libSystem.B.dylib"
diff --git a/src/cmd/vendor/golang.org/x/sys/unix/zsyscall_darwin_386.s b/src/cmd/vendor/golang.org/x/sys/unix/zsyscall_darwin_386.s
deleted file mode 100644
index 8cc7928d92..0000000000
--- a/src/cmd/vendor/golang.org/x/sys/unix/zsyscall_darwin_386.s
+++ /dev/null
@@ -1,291 +0,0 @@
-// go run mkasm_darwin.go 386
-// Code generated by the command above; DO NOT EDIT.
-
-//go:build go1.12
-// +build go1.12
-
-#include "textflag.h"
-TEXT ·libc_getgroups_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_getgroups(SB)
-TEXT ·libc_setgroups_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_setgroups(SB)
-TEXT ·libc_wait4_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_wait4(SB)
-TEXT ·libc_accept_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_accept(SB)
-TEXT ·libc_bind_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_bind(SB)
-TEXT ·libc_connect_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_connect(SB)
-TEXT ·libc_socket_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_socket(SB)
-TEXT ·libc_getsockopt_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_getsockopt(SB)
-TEXT ·libc_setsockopt_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_setsockopt(SB)
-TEXT ·libc_getpeername_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_getpeername(SB)
-TEXT ·libc_getsockname_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_getsockname(SB)
-TEXT ·libc_shutdown_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_shutdown(SB)
-TEXT ·libc_socketpair_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_socketpair(SB)
-TEXT ·libc_recvfrom_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_recvfrom(SB)
-TEXT ·libc_sendto_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_sendto(SB)
-TEXT ·libc_recvmsg_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_recvmsg(SB)
-TEXT ·libc_sendmsg_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_sendmsg(SB)
-TEXT ·libc_kevent_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_kevent(SB)
-TEXT ·libc_utimes_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_utimes(SB)
-TEXT ·libc_futimes_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_futimes(SB)
-TEXT ·libc_poll_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_poll(SB)
-TEXT ·libc_madvise_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_madvise(SB)
-TEXT ·libc_mlock_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_mlock(SB)
-TEXT ·libc_mlockall_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_mlockall(SB)
-TEXT ·libc_mprotect_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_mprotect(SB)
-TEXT ·libc_msync_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_msync(SB)
-TEXT ·libc_munlock_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_munlock(SB)
-TEXT ·libc_munlockall_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_munlockall(SB)
-TEXT ·libc_pipe_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_pipe(SB)
-TEXT ·libc_getxattr_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_getxattr(SB)
-TEXT ·libc_fgetxattr_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_fgetxattr(SB)
-TEXT ·libc_setxattr_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_setxattr(SB)
-TEXT ·libc_fsetxattr_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_fsetxattr(SB)
-TEXT ·libc_removexattr_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_removexattr(SB)
-TEXT ·libc_fremovexattr_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_fremovexattr(SB)
-TEXT ·libc_listxattr_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_listxattr(SB)
-TEXT ·libc_flistxattr_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_flistxattr(SB)
-TEXT ·libc_setattrlist_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_setattrlist(SB)
-TEXT ·libc_fcntl_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_fcntl(SB)
-TEXT ·libc_kill_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_kill(SB)
-TEXT ·libc_ioctl_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_ioctl(SB)
-TEXT ·libc_sysctl_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_sysctl(SB)
-TEXT ·libc_sendfile_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_sendfile(SB)
-TEXT ·libc_access_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_access(SB)
-TEXT ·libc_adjtime_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_adjtime(SB)
-TEXT ·libc_chdir_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_chdir(SB)
-TEXT ·libc_chflags_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_chflags(SB)
-TEXT ·libc_chmod_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_chmod(SB)
-TEXT ·libc_chown_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_chown(SB)
-TEXT ·libc_chroot_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_chroot(SB)
-TEXT ·libc_clock_gettime_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_clock_gettime(SB)
-TEXT ·libc_close_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_close(SB)
-TEXT ·libc_clonefile_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_clonefile(SB)
-TEXT ·libc_clonefileat_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_clonefileat(SB)
-TEXT ·libc_dup_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_dup(SB)
-TEXT ·libc_dup2_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_dup2(SB)
-TEXT ·libc_exchangedata_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_exchangedata(SB)
-TEXT ·libc_exit_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_exit(SB)
-TEXT ·libc_faccessat_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_faccessat(SB)
-TEXT ·libc_fchdir_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_fchdir(SB)
-TEXT ·libc_fchflags_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_fchflags(SB)
-TEXT ·libc_fchmod_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_fchmod(SB)
-TEXT ·libc_fchmodat_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_fchmodat(SB)
-TEXT ·libc_fchown_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_fchown(SB)
-TEXT ·libc_fchownat_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_fchownat(SB)
-TEXT ·libc_fclonefileat_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_fclonefileat(SB)
-TEXT ·libc_flock_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_flock(SB)
-TEXT ·libc_fpathconf_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_fpathconf(SB)
-TEXT ·libc_fsync_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_fsync(SB)
-TEXT ·libc_ftruncate_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_ftruncate(SB)
-TEXT ·libc_getcwd_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_getcwd(SB)
-TEXT ·libc_getdtablesize_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_getdtablesize(SB)
-TEXT ·libc_getegid_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_getegid(SB)
-TEXT ·libc_geteuid_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_geteuid(SB)
-TEXT ·libc_getgid_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_getgid(SB)
-TEXT ·libc_getpgid_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_getpgid(SB)
-TEXT ·libc_getpgrp_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_getpgrp(SB)
-TEXT ·libc_getpid_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_getpid(SB)
-TEXT ·libc_getppid_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_getppid(SB)
-TEXT ·libc_getpriority_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_getpriority(SB)
-TEXT ·libc_getrlimit_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_getrlimit(SB)
-TEXT ·libc_getrusage_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_getrusage(SB)
-TEXT ·libc_getsid_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_getsid(SB)
-TEXT ·libc_gettimeofday_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_gettimeofday(SB)
-TEXT ·libc_getuid_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_getuid(SB)
-TEXT ·libc_issetugid_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_issetugid(SB)
-TEXT ·libc_kqueue_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_kqueue(SB)
-TEXT ·libc_lchown_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_lchown(SB)
-TEXT ·libc_link_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_link(SB)
-TEXT ·libc_linkat_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_linkat(SB)
-TEXT ·libc_listen_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_listen(SB)
-TEXT ·libc_mkdir_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_mkdir(SB)
-TEXT ·libc_mkdirat_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_mkdirat(SB)
-TEXT ·libc_mkfifo_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_mkfifo(SB)
-TEXT ·libc_mknod_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_mknod(SB)
-TEXT ·libc_open_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_open(SB)
-TEXT ·libc_openat_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_openat(SB)
-TEXT ·libc_pathconf_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_pathconf(SB)
-TEXT ·libc_pread_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_pread(SB)
-TEXT ·libc_pwrite_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_pwrite(SB)
-TEXT ·libc_read_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_read(SB)
-TEXT ·libc_readlink_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_readlink(SB)
-TEXT ·libc_readlinkat_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_readlinkat(SB)
-TEXT ·libc_rename_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_rename(SB)
-TEXT ·libc_renameat_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_renameat(SB)
-TEXT ·libc_revoke_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_revoke(SB)
-TEXT ·libc_rmdir_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_rmdir(SB)
-TEXT ·libc_lseek_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_lseek(SB)
-TEXT ·libc_select_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_select(SB)
-TEXT ·libc_setegid_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_setegid(SB)
-TEXT ·libc_seteuid_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_seteuid(SB)
-TEXT ·libc_setgid_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_setgid(SB)
-TEXT ·libc_setlogin_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_setlogin(SB)
-TEXT ·libc_setpgid_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_setpgid(SB)
-TEXT ·libc_setpriority_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_setpriority(SB)
-TEXT ·libc_setprivexec_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_setprivexec(SB)
-TEXT ·libc_setregid_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_setregid(SB)
-TEXT ·libc_setreuid_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_setreuid(SB)
-TEXT ·libc_setrlimit_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_setrlimit(SB)
-TEXT ·libc_setsid_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_setsid(SB)
-TEXT ·libc_settimeofday_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_settimeofday(SB)
-TEXT ·libc_setuid_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_setuid(SB)
-TEXT ·libc_symlink_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_symlink(SB)
-TEXT ·libc_symlinkat_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_symlinkat(SB)
-TEXT ·libc_sync_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_sync(SB)
-TEXT ·libc_truncate_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_truncate(SB)
-TEXT ·libc_umask_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_umask(SB)
-TEXT ·libc_undelete_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_undelete(SB)
-TEXT ·libc_unlink_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_unlink(SB)
-TEXT ·libc_unlinkat_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_unlinkat(SB)
-TEXT ·libc_unmount_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_unmount(SB)
-TEXT ·libc_write_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_write(SB)
-TEXT ·libc_mmap_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_mmap(SB)
-TEXT ·libc_munmap_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_munmap(SB)
-TEXT ·libc_fstat64_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_fstat64(SB)
-TEXT ·libc_fstatat64_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_fstatat64(SB)
-TEXT ·libc_fstatfs64_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_fstatfs64(SB)
-TEXT ·libc_getfsstat64_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_getfsstat64(SB)
-TEXT ·libc_lstat64_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_lstat64(SB)
-TEXT ·libc_ptrace_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_ptrace(SB)
-TEXT ·libc_stat64_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_stat64(SB)
-TEXT ·libc_statfs64_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_statfs64(SB)
diff --git a/src/cmd/vendor/golang.org/x/sys/unix/zsyscall_darwin_amd64.1_13.go b/src/cmd/vendor/golang.org/x/sys/unix/zsyscall_darwin_amd64.1_13.go
index e36299ead0..a06eb09324 100644
--- a/src/cmd/vendor/golang.org/x/sys/unix/zsyscall_darwin_amd64.1_13.go
+++ b/src/cmd/vendor/golang.org/x/sys/unix/zsyscall_darwin_amd64.1_13.go
@@ -16,25 +16,25 @@ var _ syscall.Errno
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func closedir(dir uintptr) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_closedir_trampoline), uintptr(dir), 0, 0)
+	_, _, e1 := syscall_syscall(libc_closedir_trampoline_addr, uintptr(dir), 0, 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_closedir_trampoline()
+var libc_closedir_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_closedir closedir "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func readdir_r(dir uintptr, entry *Dirent, result **Dirent) (res Errno) {
-	r0, _, _ := syscall_syscall(funcPC(libc_readdir_r_trampoline), uintptr(dir), uintptr(unsafe.Pointer(entry)), uintptr(unsafe.Pointer(result)))
+	r0, _, _ := syscall_syscall(libc_readdir_r_trampoline_addr, uintptr(dir), uintptr(unsafe.Pointer(entry)), uintptr(unsafe.Pointer(result)))
 	res = Errno(r0)
 	return
 }
 
-func libc_readdir_r_trampoline()
+var libc_readdir_r_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_readdir_r readdir_r "/usr/lib/libSystem.B.dylib"
diff --git a/src/cmd/vendor/golang.org/x/sys/unix/zsyscall_darwin_amd64.1_13.s b/src/cmd/vendor/golang.org/x/sys/unix/zsyscall_darwin_amd64.1_13.s
index ab59833fcd..d6c3e25c01 100644
--- a/src/cmd/vendor/golang.org/x/sys/unix/zsyscall_darwin_amd64.1_13.s
+++ b/src/cmd/vendor/golang.org/x/sys/unix/zsyscall_darwin_amd64.1_13.s
@@ -5,9 +5,21 @@
 // +build go1.13
 
 #include "textflag.h"
-TEXT ·libc_fdopendir_trampoline(SB),NOSPLIT,$0-0
+
+TEXT libc_fdopendir_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_fdopendir(SB)
-TEXT ·libc_closedir_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_fdopendir_trampoline_addr(SB), RODATA, $8
+DATA	·libc_fdopendir_trampoline_addr(SB)/8, $libc_fdopendir_trampoline<>(SB)
+
+TEXT libc_closedir_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_closedir(SB)
-TEXT ·libc_readdir_r_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_closedir_trampoline_addr(SB), RODATA, $8
+DATA	·libc_closedir_trampoline_addr(SB)/8, $libc_closedir_trampoline<>(SB)
+
+TEXT libc_readdir_r_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_readdir_r(SB)
+
+GLOBL	·libc_readdir_r_trampoline_addr(SB), RODATA, $8
+DATA	·libc_readdir_r_trampoline_addr(SB)/8, $libc_readdir_r_trampoline<>(SB)
diff --git a/src/cmd/vendor/golang.org/x/sys/unix/zsyscall_darwin_amd64.go b/src/cmd/vendor/golang.org/x/sys/unix/zsyscall_darwin_amd64.go
index f411162882..d4efe8d457 100644
--- a/src/cmd/vendor/golang.org/x/sys/unix/zsyscall_darwin_amd64.go
+++ b/src/cmd/vendor/golang.org/x/sys/unix/zsyscall_darwin_amd64.go
@@ -16,7 +16,7 @@ var _ syscall.Errno
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func getgroups(ngid int, gid *_Gid_t) (n int, err error) {
-	r0, _, e1 := syscall_rawSyscall(funcPC(libc_getgroups_trampoline), uintptr(ngid), uintptr(unsafe.Pointer(gid)), 0)
+	r0, _, e1 := syscall_rawSyscall(libc_getgroups_trampoline_addr, uintptr(ngid), uintptr(unsafe.Pointer(gid)), 0)
 	n = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -24,28 +24,28 @@ func getgroups(ngid int, gid *_Gid_t) (n int, err error) {
 	return
 }
 
-func libc_getgroups_trampoline()
+var libc_getgroups_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_getgroups getgroups "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func setgroups(ngid int, gid *_Gid_t) (err error) {
-	_, _, e1 := syscall_rawSyscall(funcPC(libc_setgroups_trampoline), uintptr(ngid), uintptr(unsafe.Pointer(gid)), 0)
+	_, _, e1 := syscall_rawSyscall(libc_setgroups_trampoline_addr, uintptr(ngid), uintptr(unsafe.Pointer(gid)), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_setgroups_trampoline()
+var libc_setgroups_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_setgroups setgroups "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func wait4(pid int, wstatus *_C_int, options int, rusage *Rusage) (wpid int, err error) {
-	r0, _, e1 := syscall_syscall6(funcPC(libc_wait4_trampoline), uintptr(pid), uintptr(unsafe.Pointer(wstatus)), uintptr(options), uintptr(unsafe.Pointer(rusage)), 0, 0)
+	r0, _, e1 := syscall_syscall6(libc_wait4_trampoline_addr, uintptr(pid), uintptr(unsafe.Pointer(wstatus)), uintptr(options), uintptr(unsafe.Pointer(rusage)), 0, 0)
 	wpid = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -53,14 +53,14 @@ func wait4(pid int, wstatus *_C_int, options int, rusage *Rusage) (wpid int, err
 	return
 }
 
-func libc_wait4_trampoline()
+var libc_wait4_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_wait4 wait4 "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func accept(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (fd int, err error) {
-	r0, _, e1 := syscall_syscall(funcPC(libc_accept_trampoline), uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)))
+	r0, _, e1 := syscall_syscall(libc_accept_trampoline_addr, uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)))
 	fd = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -68,42 +68,42 @@ func accept(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (fd int, err error) {
 	return
 }
 
-func libc_accept_trampoline()
+var libc_accept_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_accept accept "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_bind_trampoline), uintptr(s), uintptr(addr), uintptr(addrlen))
+	_, _, e1 := syscall_syscall(libc_bind_trampoline_addr, uintptr(s), uintptr(addr), uintptr(addrlen))
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_bind_trampoline()
+var libc_bind_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_bind bind "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_connect_trampoline), uintptr(s), uintptr(addr), uintptr(addrlen))
+	_, _, e1 := syscall_syscall(libc_connect_trampoline_addr, uintptr(s), uintptr(addr), uintptr(addrlen))
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_connect_trampoline()
+var libc_connect_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_connect connect "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func socket(domain int, typ int, proto int) (fd int, err error) {
-	r0, _, e1 := syscall_rawSyscall(funcPC(libc_socket_trampoline), uintptr(domain), uintptr(typ), uintptr(proto))
+	r0, _, e1 := syscall_rawSyscall(libc_socket_trampoline_addr, uintptr(domain), uintptr(typ), uintptr(proto))
 	fd = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -111,91 +111,91 @@ func socket(domain int, typ int, proto int) (fd int, err error) {
 	return
 }
 
-func libc_socket_trampoline()
+var libc_socket_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_socket socket "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error) {
-	_, _, e1 := syscall_syscall6(funcPC(libc_getsockopt_trampoline), uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(unsafe.Pointer(vallen)), 0)
+	_, _, e1 := syscall_syscall6(libc_getsockopt_trampoline_addr, uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(unsafe.Pointer(vallen)), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_getsockopt_trampoline()
+var libc_getsockopt_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_getsockopt getsockopt "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) (err error) {
-	_, _, e1 := syscall_syscall6(funcPC(libc_setsockopt_trampoline), uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(vallen), 0)
+	_, _, e1 := syscall_syscall6(libc_setsockopt_trampoline_addr, uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(vallen), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_setsockopt_trampoline()
+var libc_setsockopt_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_setsockopt setsockopt "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func getpeername(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) {
-	_, _, e1 := syscall_rawSyscall(funcPC(libc_getpeername_trampoline), uintptr(fd), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)))
+	_, _, e1 := syscall_rawSyscall(libc_getpeername_trampoline_addr, uintptr(fd), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)))
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_getpeername_trampoline()
+var libc_getpeername_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_getpeername getpeername "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func getsockname(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) {
-	_, _, e1 := syscall_rawSyscall(funcPC(libc_getsockname_trampoline), uintptr(fd), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)))
+	_, _, e1 := syscall_rawSyscall(libc_getsockname_trampoline_addr, uintptr(fd), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)))
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_getsockname_trampoline()
+var libc_getsockname_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_getsockname getsockname "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Shutdown(s int, how int) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_shutdown_trampoline), uintptr(s), uintptr(how), 0)
+	_, _, e1 := syscall_syscall(libc_shutdown_trampoline_addr, uintptr(s), uintptr(how), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_shutdown_trampoline()
+var libc_shutdown_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_shutdown shutdown "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func socketpair(domain int, typ int, proto int, fd *[2]int32) (err error) {
-	_, _, e1 := syscall_rawSyscall6(funcPC(libc_socketpair_trampoline), uintptr(domain), uintptr(typ), uintptr(proto), uintptr(unsafe.Pointer(fd)), 0, 0)
+	_, _, e1 := syscall_rawSyscall6(libc_socketpair_trampoline_addr, uintptr(domain), uintptr(typ), uintptr(proto), uintptr(unsafe.Pointer(fd)), 0, 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_socketpair_trampoline()
+var libc_socketpair_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_socketpair socketpair "/usr/lib/libSystem.B.dylib"
 
@@ -208,7 +208,7 @@ func recvfrom(fd int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Sockl
 	} else {
 		_p0 = unsafe.Pointer(&_zero)
 	}
-	r0, _, e1 := syscall_syscall6(funcPC(libc_recvfrom_trampoline), uintptr(fd), uintptr(_p0), uintptr(len(p)), uintptr(flags), uintptr(unsafe.Pointer(from)), uintptr(unsafe.Pointer(fromlen)))
+	r0, _, e1 := syscall_syscall6(libc_recvfrom_trampoline_addr, uintptr(fd), uintptr(_p0), uintptr(len(p)), uintptr(flags), uintptr(unsafe.Pointer(from)), uintptr(unsafe.Pointer(fromlen)))
 	n = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -216,7 +216,7 @@ func recvfrom(fd int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Sockl
 	return
 }
 
-func libc_recvfrom_trampoline()
+var libc_recvfrom_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_recvfrom recvfrom "/usr/lib/libSystem.B.dylib"
 
@@ -229,21 +229,21 @@ func sendto(s int, buf []byte, flags int, to unsafe.Pointer, addrlen _Socklen) (
 	} else {
 		_p0 = unsafe.Pointer(&_zero)
 	}
-	_, _, e1 := syscall_syscall6(funcPC(libc_sendto_trampoline), uintptr(s), uintptr(_p0), uintptr(len(buf)), uintptr(flags), uintptr(to), uintptr(addrlen))
+	_, _, e1 := syscall_syscall6(libc_sendto_trampoline_addr, uintptr(s), uintptr(_p0), uintptr(len(buf)), uintptr(flags), uintptr(to), uintptr(addrlen))
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_sendto_trampoline()
+var libc_sendto_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_sendto sendto "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func recvmsg(s int, msg *Msghdr, flags int) (n int, err error) {
-	r0, _, e1 := syscall_syscall(funcPC(libc_recvmsg_trampoline), uintptr(s), uintptr(unsafe.Pointer(msg)), uintptr(flags))
+	r0, _, e1 := syscall_syscall(libc_recvmsg_trampoline_addr, uintptr(s), uintptr(unsafe.Pointer(msg)), uintptr(flags))
 	n = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -251,14 +251,14 @@ func recvmsg(s int, msg *Msghdr, flags int) (n int, err error) {
 	return
 }
 
-func libc_recvmsg_trampoline()
+var libc_recvmsg_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_recvmsg recvmsg "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func sendmsg(s int, msg *Msghdr, flags int) (n int, err error) {
-	r0, _, e1 := syscall_syscall(funcPC(libc_sendmsg_trampoline), uintptr(s), uintptr(unsafe.Pointer(msg)), uintptr(flags))
+	r0, _, e1 := syscall_syscall(libc_sendmsg_trampoline_addr, uintptr(s), uintptr(unsafe.Pointer(msg)), uintptr(flags))
 	n = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -266,14 +266,14 @@ func sendmsg(s int, msg *Msghdr, flags int) (n int, err error) {
 	return
 }
 
-func libc_sendmsg_trampoline()
+var libc_sendmsg_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_sendmsg sendmsg "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func kevent(kq int, change unsafe.Pointer, nchange int, event unsafe.Pointer, nevent int, timeout *Timespec) (n int, err error) {
-	r0, _, e1 := syscall_syscall6(funcPC(libc_kevent_trampoline), uintptr(kq), uintptr(change), uintptr(nchange), uintptr(event), uintptr(nevent), uintptr(unsafe.Pointer(timeout)))
+	r0, _, e1 := syscall_syscall6(libc_kevent_trampoline_addr, uintptr(kq), uintptr(change), uintptr(nchange), uintptr(event), uintptr(nevent), uintptr(unsafe.Pointer(timeout)))
 	n = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -281,7 +281,7 @@ func kevent(kq int, change unsafe.Pointer, nchange int, event unsafe.Pointer, ne
 	return
 }
 
-func libc_kevent_trampoline()
+var libc_kevent_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_kevent kevent "/usr/lib/libSystem.B.dylib"
 
@@ -293,35 +293,35 @@ func utimes(path string, timeval *[2]Timeval) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall(funcPC(libc_utimes_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(timeval)), 0)
+	_, _, e1 := syscall_syscall(libc_utimes_trampoline_addr, uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(timeval)), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_utimes_trampoline()
+var libc_utimes_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_utimes utimes "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func futimes(fd int, timeval *[2]Timeval) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_futimes_trampoline), uintptr(fd), uintptr(unsafe.Pointer(timeval)), 0)
+	_, _, e1 := syscall_syscall(libc_futimes_trampoline_addr, uintptr(fd), uintptr(unsafe.Pointer(timeval)), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_futimes_trampoline()
+var libc_futimes_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_futimes futimes "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func poll(fds *PollFd, nfds int, timeout int) (n int, err error) {
-	r0, _, e1 := syscall_syscall(funcPC(libc_poll_trampoline), uintptr(unsafe.Pointer(fds)), uintptr(nfds), uintptr(timeout))
+	r0, _, e1 := syscall_syscall(libc_poll_trampoline_addr, uintptr(unsafe.Pointer(fds)), uintptr(nfds), uintptr(timeout))
 	n = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -329,7 +329,7 @@ func poll(fds *PollFd, nfds int, timeout int) (n int, err error) {
 	return
 }
 
-func libc_poll_trampoline()
+var libc_poll_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_poll poll "/usr/lib/libSystem.B.dylib"
 
@@ -342,14 +342,14 @@ func Madvise(b []byte, behav int) (err error) {
 	} else {
 		_p0 = unsafe.Pointer(&_zero)
 	}
-	_, _, e1 := syscall_syscall(funcPC(libc_madvise_trampoline), uintptr(_p0), uintptr(len(b)), uintptr(behav))
+	_, _, e1 := syscall_syscall(libc_madvise_trampoline_addr, uintptr(_p0), uintptr(len(b)), uintptr(behav))
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_madvise_trampoline()
+var libc_madvise_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_madvise madvise "/usr/lib/libSystem.B.dylib"
 
@@ -362,28 +362,28 @@ func Mlock(b []byte) (err error) {
 	} else {
 		_p0 = unsafe.Pointer(&_zero)
 	}
-	_, _, e1 := syscall_syscall(funcPC(libc_mlock_trampoline), uintptr(_p0), uintptr(len(b)), 0)
+	_, _, e1 := syscall_syscall(libc_mlock_trampoline_addr, uintptr(_p0), uintptr(len(b)), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_mlock_trampoline()
+var libc_mlock_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_mlock mlock "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Mlockall(flags int) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_mlockall_trampoline), uintptr(flags), 0, 0)
+	_, _, e1 := syscall_syscall(libc_mlockall_trampoline_addr, uintptr(flags), 0, 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_mlockall_trampoline()
+var libc_mlockall_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_mlockall mlockall "/usr/lib/libSystem.B.dylib"
 
@@ -396,14 +396,14 @@ func Mprotect(b []byte, prot int) (err error) {
 	} else {
 		_p0 = unsafe.Pointer(&_zero)
 	}
-	_, _, e1 := syscall_syscall(funcPC(libc_mprotect_trampoline), uintptr(_p0), uintptr(len(b)), uintptr(prot))
+	_, _, e1 := syscall_syscall(libc_mprotect_trampoline_addr, uintptr(_p0), uintptr(len(b)), uintptr(prot))
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_mprotect_trampoline()
+var libc_mprotect_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_mprotect mprotect "/usr/lib/libSystem.B.dylib"
 
@@ -416,14 +416,14 @@ func Msync(b []byte, flags int) (err error) {
 	} else {
 		_p0 = unsafe.Pointer(&_zero)
 	}
-	_, _, e1 := syscall_syscall(funcPC(libc_msync_trampoline), uintptr(_p0), uintptr(len(b)), uintptr(flags))
+	_, _, e1 := syscall_syscall(libc_msync_trampoline_addr, uintptr(_p0), uintptr(len(b)), uintptr(flags))
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_msync_trampoline()
+var libc_msync_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_msync msync "/usr/lib/libSystem.B.dylib"
 
@@ -436,42 +436,42 @@ func Munlock(b []byte) (err error) {
 	} else {
 		_p0 = unsafe.Pointer(&_zero)
 	}
-	_, _, e1 := syscall_syscall(funcPC(libc_munlock_trampoline), uintptr(_p0), uintptr(len(b)), 0)
+	_, _, e1 := syscall_syscall(libc_munlock_trampoline_addr, uintptr(_p0), uintptr(len(b)), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_munlock_trampoline()
+var libc_munlock_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_munlock munlock "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Munlockall() (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_munlockall_trampoline), 0, 0, 0)
+	_, _, e1 := syscall_syscall(libc_munlockall_trampoline_addr, 0, 0, 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_munlockall_trampoline()
+var libc_munlockall_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_munlockall munlockall "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func pipe(p *[2]int32) (err error) {
-	_, _, e1 := syscall_rawSyscall(funcPC(libc_pipe_trampoline), uintptr(unsafe.Pointer(p)), 0, 0)
+	_, _, e1 := syscall_rawSyscall(libc_pipe_trampoline_addr, uintptr(unsafe.Pointer(p)), 0, 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_pipe_trampoline()
+var libc_pipe_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_pipe pipe "/usr/lib/libSystem.B.dylib"
 
@@ -488,7 +488,7 @@ func getxattr(path string, attr string, dest *byte, size int, position uint32, o
 	if err != nil {
 		return
 	}
-	r0, _, e1 := syscall_syscall6(funcPC(libc_getxattr_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), uintptr(unsafe.Pointer(dest)), uintptr(size), uintptr(position), uintptr(options))
+	r0, _, e1 := syscall_syscall6(libc_getxattr_trampoline_addr, uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), uintptr(unsafe.Pointer(dest)), uintptr(size), uintptr(position), uintptr(options))
 	sz = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -496,7 +496,7 @@ func getxattr(path string, attr string, dest *byte, size int, position uint32, o
 	return
 }
 
-func libc_getxattr_trampoline()
+var libc_getxattr_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_getxattr getxattr "/usr/lib/libSystem.B.dylib"
 
@@ -508,7 +508,7 @@ func fgetxattr(fd int, attr string, dest *byte, size int, position uint32, optio
 	if err != nil {
 		return
 	}
-	r0, _, e1 := syscall_syscall6(funcPC(libc_fgetxattr_trampoline), uintptr(fd), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(dest)), uintptr(size), uintptr(position), uintptr(options))
+	r0, _, e1 := syscall_syscall6(libc_fgetxattr_trampoline_addr, uintptr(fd), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(dest)), uintptr(size), uintptr(position), uintptr(options))
 	sz = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -516,7 +516,7 @@ func fgetxattr(fd int, attr string, dest *byte, size int, position uint32, optio
 	return
 }
 
-func libc_fgetxattr_trampoline()
+var libc_fgetxattr_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_fgetxattr fgetxattr "/usr/lib/libSystem.B.dylib"
 
@@ -533,14 +533,14 @@ func setxattr(path string, attr string, data *byte, size int, position uint32, o
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall6(funcPC(libc_setxattr_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), uintptr(unsafe.Pointer(data)), uintptr(size), uintptr(position), uintptr(options))
+	_, _, e1 := syscall_syscall6(libc_setxattr_trampoline_addr, uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), uintptr(unsafe.Pointer(data)), uintptr(size), uintptr(position), uintptr(options))
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_setxattr_trampoline()
+var libc_setxattr_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_setxattr setxattr "/usr/lib/libSystem.B.dylib"
 
@@ -552,14 +552,14 @@ func fsetxattr(fd int, attr string, data *byte, size int, position uint32, optio
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall6(funcPC(libc_fsetxattr_trampoline), uintptr(fd), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(data)), uintptr(size), uintptr(position), uintptr(options))
+	_, _, e1 := syscall_syscall6(libc_fsetxattr_trampoline_addr, uintptr(fd), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(data)), uintptr(size), uintptr(position), uintptr(options))
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_fsetxattr_trampoline()
+var libc_fsetxattr_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_fsetxattr fsetxattr "/usr/lib/libSystem.B.dylib"
 
@@ -576,14 +576,14 @@ func removexattr(path string, attr string, options int) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall(funcPC(libc_removexattr_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), uintptr(options))
+	_, _, e1 := syscall_syscall(libc_removexattr_trampoline_addr, uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), uintptr(options))
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_removexattr_trampoline()
+var libc_removexattr_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_removexattr removexattr "/usr/lib/libSystem.B.dylib"
 
@@ -595,14 +595,14 @@ func fremovexattr(fd int, attr string, options int) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall(funcPC(libc_fremovexattr_trampoline), uintptr(fd), uintptr(unsafe.Pointer(_p0)), uintptr(options))
+	_, _, e1 := syscall_syscall(libc_fremovexattr_trampoline_addr, uintptr(fd), uintptr(unsafe.Pointer(_p0)), uintptr(options))
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_fremovexattr_trampoline()
+var libc_fremovexattr_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_fremovexattr fremovexattr "/usr/lib/libSystem.B.dylib"
 
@@ -614,7 +614,7 @@ func listxattr(path string, dest *byte, size int, options int) (sz int, err erro
 	if err != nil {
 		return
 	}
-	r0, _, e1 := syscall_syscall6(funcPC(libc_listxattr_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(dest)), uintptr(size), uintptr(options), 0, 0)
+	r0, _, e1 := syscall_syscall6(libc_listxattr_trampoline_addr, uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(dest)), uintptr(size), uintptr(options), 0, 0)
 	sz = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -622,14 +622,14 @@ func listxattr(path string, dest *byte, size int, options int) (sz int, err erro
 	return
 }
 
-func libc_listxattr_trampoline()
+var libc_listxattr_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_listxattr listxattr "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func flistxattr(fd int, dest *byte, size int, options int) (sz int, err error) {
-	r0, _, e1 := syscall_syscall6(funcPC(libc_flistxattr_trampoline), uintptr(fd), uintptr(unsafe.Pointer(dest)), uintptr(size), uintptr(options), 0, 0)
+	r0, _, e1 := syscall_syscall6(libc_flistxattr_trampoline_addr, uintptr(fd), uintptr(unsafe.Pointer(dest)), uintptr(size), uintptr(options), 0, 0)
 	sz = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -637,28 +637,28 @@ func flistxattr(fd int, dest *byte, size int, options int) (sz int, err error) {
 	return
 }
 
-func libc_flistxattr_trampoline()
+var libc_flistxattr_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_flistxattr flistxattr "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func setattrlist(path *byte, list unsafe.Pointer, buf unsafe.Pointer, size uintptr, options int) (err error) {
-	_, _, e1 := syscall_syscall6(funcPC(libc_setattrlist_trampoline), uintptr(unsafe.Pointer(path)), uintptr(list), uintptr(buf), uintptr(size), uintptr(options), 0)
+	_, _, e1 := syscall_syscall6(libc_setattrlist_trampoline_addr, uintptr(unsafe.Pointer(path)), uintptr(list), uintptr(buf), uintptr(size), uintptr(options), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_setattrlist_trampoline()
+var libc_setattrlist_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_setattrlist setattrlist "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func fcntl(fd int, cmd int, arg int) (val int, err error) {
-	r0, _, e1 := syscall_syscall(funcPC(libc_fcntl_trampoline), uintptr(fd), uintptr(cmd), uintptr(arg))
+	r0, _, e1 := syscall_syscall(libc_fcntl_trampoline_addr, uintptr(fd), uintptr(cmd), uintptr(arg))
 	val = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -666,35 +666,35 @@ func fcntl(fd int, cmd int, arg int) (val int, err error) {
 	return
 }
 
-func libc_fcntl_trampoline()
+var libc_fcntl_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_fcntl fcntl "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func kill(pid int, signum int, posix int) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_kill_trampoline), uintptr(pid), uintptr(signum), uintptr(posix))
+	_, _, e1 := syscall_syscall(libc_kill_trampoline_addr, uintptr(pid), uintptr(signum), uintptr(posix))
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_kill_trampoline()
+var libc_kill_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_kill kill "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func ioctl(fd int, req uint, arg uintptr) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_ioctl_trampoline), uintptr(fd), uintptr(req), uintptr(arg))
+	_, _, e1 := syscall_syscall(libc_ioctl_trampoline_addr, uintptr(fd), uintptr(req), uintptr(arg))
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_ioctl_trampoline()
+var libc_ioctl_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_ioctl ioctl "/usr/lib/libSystem.B.dylib"
 
@@ -707,28 +707,28 @@ func sysctl(mib []_C_int, old *byte, oldlen *uintptr, new *byte, newlen uintptr)
 	} else {
 		_p0 = unsafe.Pointer(&_zero)
 	}
-	_, _, e1 := syscall_syscall6(funcPC(libc_sysctl_trampoline), uintptr(_p0), uintptr(len(mib)), uintptr(unsafe.Pointer(old)), uintptr(unsafe.Pointer(oldlen)), uintptr(unsafe.Pointer(new)), uintptr(newlen))
+	_, _, e1 := syscall_syscall6(libc_sysctl_trampoline_addr, uintptr(_p0), uintptr(len(mib)), uintptr(unsafe.Pointer(old)), uintptr(unsafe.Pointer(oldlen)), uintptr(unsafe.Pointer(new)), uintptr(newlen))
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_sysctl_trampoline()
+var libc_sysctl_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_sysctl sysctl "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func sendfile(infd int, outfd int, offset int64, len *int64, hdtr unsafe.Pointer, flags int) (err error) {
-	_, _, e1 := syscall_syscall6(funcPC(libc_sendfile_trampoline), uintptr(infd), uintptr(outfd), uintptr(offset), uintptr(unsafe.Pointer(len)), uintptr(hdtr), uintptr(flags))
+	_, _, e1 := syscall_syscall6(libc_sendfile_trampoline_addr, uintptr(infd), uintptr(outfd), uintptr(offset), uintptr(unsafe.Pointer(len)), uintptr(hdtr), uintptr(flags))
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_sendfile_trampoline()
+var libc_sendfile_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_sendfile sendfile "/usr/lib/libSystem.B.dylib"
 
@@ -740,28 +740,28 @@ func Access(path string, mode uint32) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall(funcPC(libc_access_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(mode), 0)
+	_, _, e1 := syscall_syscall(libc_access_trampoline_addr, uintptr(unsafe.Pointer(_p0)), uintptr(mode), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_access_trampoline()
+var libc_access_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_access access "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Adjtime(delta *Timeval, olddelta *Timeval) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_adjtime_trampoline), uintptr(unsafe.Pointer(delta)), uintptr(unsafe.Pointer(olddelta)), 0)
+	_, _, e1 := syscall_syscall(libc_adjtime_trampoline_addr, uintptr(unsafe.Pointer(delta)), uintptr(unsafe.Pointer(olddelta)), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_adjtime_trampoline()
+var libc_adjtime_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_adjtime adjtime "/usr/lib/libSystem.B.dylib"
 
@@ -773,14 +773,14 @@ func Chdir(path string) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall(funcPC(libc_chdir_trampoline), uintptr(unsafe.Pointer(_p0)), 0, 0)
+	_, _, e1 := syscall_syscall(libc_chdir_trampoline_addr, uintptr(unsafe.Pointer(_p0)), 0, 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_chdir_trampoline()
+var libc_chdir_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_chdir chdir "/usr/lib/libSystem.B.dylib"
 
@@ -792,14 +792,14 @@ func Chflags(path string, flags int) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall(funcPC(libc_chflags_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(flags), 0)
+	_, _, e1 := syscall_syscall(libc_chflags_trampoline_addr, uintptr(unsafe.Pointer(_p0)), uintptr(flags), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_chflags_trampoline()
+var libc_chflags_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_chflags chflags "/usr/lib/libSystem.B.dylib"
 
@@ -811,14 +811,14 @@ func Chmod(path string, mode uint32) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall(funcPC(libc_chmod_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(mode), 0)
+	_, _, e1 := syscall_syscall(libc_chmod_trampoline_addr, uintptr(unsafe.Pointer(_p0)), uintptr(mode), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_chmod_trampoline()
+var libc_chmod_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_chmod chmod "/usr/lib/libSystem.B.dylib"
 
@@ -830,14 +830,14 @@ func Chown(path string, uid int, gid int) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall(funcPC(libc_chown_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(uid), uintptr(gid))
+	_, _, e1 := syscall_syscall(libc_chown_trampoline_addr, uintptr(unsafe.Pointer(_p0)), uintptr(uid), uintptr(gid))
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_chown_trampoline()
+var libc_chown_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_chown chown "/usr/lib/libSystem.B.dylib"
 
@@ -849,42 +849,42 @@ func Chroot(path string) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall(funcPC(libc_chroot_trampoline), uintptr(unsafe.Pointer(_p0)), 0, 0)
+	_, _, e1 := syscall_syscall(libc_chroot_trampoline_addr, uintptr(unsafe.Pointer(_p0)), 0, 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_chroot_trampoline()
+var libc_chroot_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_chroot chroot "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func ClockGettime(clockid int32, time *Timespec) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_clock_gettime_trampoline), uintptr(clockid), uintptr(unsafe.Pointer(time)), 0)
+	_, _, e1 := syscall_syscall(libc_clock_gettime_trampoline_addr, uintptr(clockid), uintptr(unsafe.Pointer(time)), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_clock_gettime_trampoline()
+var libc_clock_gettime_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_clock_gettime clock_gettime "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Close(fd int) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_close_trampoline), uintptr(fd), 0, 0)
+	_, _, e1 := syscall_syscall(libc_close_trampoline_addr, uintptr(fd), 0, 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_close_trampoline()
+var libc_close_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_close close "/usr/lib/libSystem.B.dylib"
 
@@ -901,14 +901,14 @@ func Clonefile(src string, dst string, flags int) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall(funcPC(libc_clonefile_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), uintptr(flags))
+	_, _, e1 := syscall_syscall(libc_clonefile_trampoline_addr, uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), uintptr(flags))
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_clonefile_trampoline()
+var libc_clonefile_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_clonefile clonefile "/usr/lib/libSystem.B.dylib"
 
@@ -925,21 +925,21 @@ func Clonefileat(srcDirfd int, src string, dstDirfd int, dst string, flags int)
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall6(funcPC(libc_clonefileat_trampoline), uintptr(srcDirfd), uintptr(unsafe.Pointer(_p0)), uintptr(dstDirfd), uintptr(unsafe.Pointer(_p1)), uintptr(flags), 0)
+	_, _, e1 := syscall_syscall6(libc_clonefileat_trampoline_addr, uintptr(srcDirfd), uintptr(unsafe.Pointer(_p0)), uintptr(dstDirfd), uintptr(unsafe.Pointer(_p1)), uintptr(flags), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_clonefileat_trampoline()
+var libc_clonefileat_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_clonefileat clonefileat "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Dup(fd int) (nfd int, err error) {
-	r0, _, e1 := syscall_syscall(funcPC(libc_dup_trampoline), uintptr(fd), 0, 0)
+	r0, _, e1 := syscall_syscall(libc_dup_trampoline_addr, uintptr(fd), 0, 0)
 	nfd = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -947,21 +947,21 @@ func Dup(fd int) (nfd int, err error) {
 	return
 }
 
-func libc_dup_trampoline()
+var libc_dup_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_dup dup "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Dup2(from int, to int) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_dup2_trampoline), uintptr(from), uintptr(to), 0)
+	_, _, e1 := syscall_syscall(libc_dup2_trampoline_addr, uintptr(from), uintptr(to), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_dup2_trampoline()
+var libc_dup2_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_dup2 dup2 "/usr/lib/libSystem.B.dylib"
 
@@ -978,25 +978,25 @@ func Exchangedata(path1 string, path2 string, options int) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall(funcPC(libc_exchangedata_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), uintptr(options))
+	_, _, e1 := syscall_syscall(libc_exchangedata_trampoline_addr, uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), uintptr(options))
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_exchangedata_trampoline()
+var libc_exchangedata_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_exchangedata exchangedata "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Exit(code int) {
-	syscall_syscall(funcPC(libc_exit_trampoline), uintptr(code), 0, 0)
+	syscall_syscall(libc_exit_trampoline_addr, uintptr(code), 0, 0)
 	return
 }
 
-func libc_exit_trampoline()
+var libc_exit_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_exit exit "/usr/lib/libSystem.B.dylib"
 
@@ -1008,56 +1008,56 @@ func Faccessat(dirfd int, path string, mode uint32, flags int) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall6(funcPC(libc_faccessat_trampoline), uintptr(dirfd), uintptr(unsafe.Pointer(_p0)), uintptr(mode), uintptr(flags), 0, 0)
+	_, _, e1 := syscall_syscall6(libc_faccessat_trampoline_addr, uintptr(dirfd), uintptr(unsafe.Pointer(_p0)), uintptr(mode), uintptr(flags), 0, 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_faccessat_trampoline()
+var libc_faccessat_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_faccessat faccessat "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Fchdir(fd int) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_fchdir_trampoline), uintptr(fd), 0, 0)
+	_, _, e1 := syscall_syscall(libc_fchdir_trampoline_addr, uintptr(fd), 0, 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_fchdir_trampoline()
+var libc_fchdir_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_fchdir fchdir "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Fchflags(fd int, flags int) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_fchflags_trampoline), uintptr(fd), uintptr(flags), 0)
+	_, _, e1 := syscall_syscall(libc_fchflags_trampoline_addr, uintptr(fd), uintptr(flags), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_fchflags_trampoline()
+var libc_fchflags_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_fchflags fchflags "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Fchmod(fd int, mode uint32) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_fchmod_trampoline), uintptr(fd), uintptr(mode), 0)
+	_, _, e1 := syscall_syscall(libc_fchmod_trampoline_addr, uintptr(fd), uintptr(mode), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_fchmod_trampoline()
+var libc_fchmod_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_fchmod fchmod "/usr/lib/libSystem.B.dylib"
 
@@ -1069,28 +1069,28 @@ func Fchmodat(dirfd int, path string, mode uint32, flags int) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall6(funcPC(libc_fchmodat_trampoline), uintptr(dirfd), uintptr(unsafe.Pointer(_p0)), uintptr(mode), uintptr(flags), 0, 0)
+	_, _, e1 := syscall_syscall6(libc_fchmodat_trampoline_addr, uintptr(dirfd), uintptr(unsafe.Pointer(_p0)), uintptr(mode), uintptr(flags), 0, 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_fchmodat_trampoline()
+var libc_fchmodat_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_fchmodat fchmodat "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Fchown(fd int, uid int, gid int) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_fchown_trampoline), uintptr(fd), uintptr(uid), uintptr(gid))
+	_, _, e1 := syscall_syscall(libc_fchown_trampoline_addr, uintptr(fd), uintptr(uid), uintptr(gid))
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_fchown_trampoline()
+var libc_fchown_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_fchown fchown "/usr/lib/libSystem.B.dylib"
 
@@ -1102,14 +1102,14 @@ func Fchownat(dirfd int, path string, uid int, gid int, flags int) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall6(funcPC(libc_fchownat_trampoline), uintptr(dirfd), uintptr(unsafe.Pointer(_p0)), uintptr(uid), uintptr(gid), uintptr(flags), 0)
+	_, _, e1 := syscall_syscall6(libc_fchownat_trampoline_addr, uintptr(dirfd), uintptr(unsafe.Pointer(_p0)), uintptr(uid), uintptr(gid), uintptr(flags), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_fchownat_trampoline()
+var libc_fchownat_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_fchownat fchownat "/usr/lib/libSystem.B.dylib"
 
@@ -1121,35 +1121,35 @@ func Fclonefileat(srcDirfd int, dstDirfd int, dst string, flags int) (err error)
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall6(funcPC(libc_fclonefileat_trampoline), uintptr(srcDirfd), uintptr(dstDirfd), uintptr(unsafe.Pointer(_p0)), uintptr(flags), 0, 0)
+	_, _, e1 := syscall_syscall6(libc_fclonefileat_trampoline_addr, uintptr(srcDirfd), uintptr(dstDirfd), uintptr(unsafe.Pointer(_p0)), uintptr(flags), 0, 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_fclonefileat_trampoline()
+var libc_fclonefileat_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_fclonefileat fclonefileat "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Flock(fd int, how int) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_flock_trampoline), uintptr(fd), uintptr(how), 0)
+	_, _, e1 := syscall_syscall(libc_flock_trampoline_addr, uintptr(fd), uintptr(how), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_flock_trampoline()
+var libc_flock_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_flock flock "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Fpathconf(fd int, name int) (val int, err error) {
-	r0, _, e1 := syscall_syscall(funcPC(libc_fpathconf_trampoline), uintptr(fd), uintptr(name), 0)
+	r0, _, e1 := syscall_syscall(libc_fpathconf_trampoline_addr, uintptr(fd), uintptr(name), 0)
 	val = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -1157,35 +1157,35 @@ func Fpathconf(fd int, name int) (val int, err error) {
 	return
 }
 
-func libc_fpathconf_trampoline()
+var libc_fpathconf_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_fpathconf fpathconf "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Fsync(fd int) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_fsync_trampoline), uintptr(fd), 0, 0)
+	_, _, e1 := syscall_syscall(libc_fsync_trampoline_addr, uintptr(fd), 0, 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_fsync_trampoline()
+var libc_fsync_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_fsync fsync "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Ftruncate(fd int, length int64) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_ftruncate_trampoline), uintptr(fd), uintptr(length), 0)
+	_, _, e1 := syscall_syscall(libc_ftruncate_trampoline_addr, uintptr(fd), uintptr(length), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_ftruncate_trampoline()
+var libc_ftruncate_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_ftruncate ftruncate "/usr/lib/libSystem.B.dylib"
 
@@ -1198,7 +1198,7 @@ func Getcwd(buf []byte) (n int, err error) {
 	} else {
 		_p0 = unsafe.Pointer(&_zero)
 	}
-	r0, _, e1 := syscall_syscall(funcPC(libc_getcwd_trampoline), uintptr(_p0), uintptr(len(buf)), 0)
+	r0, _, e1 := syscall_syscall(libc_getcwd_trampoline_addr, uintptr(_p0), uintptr(len(buf)), 0)
 	n = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -1206,62 +1206,62 @@ func Getcwd(buf []byte) (n int, err error) {
 	return
 }
 
-func libc_getcwd_trampoline()
+var libc_getcwd_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_getcwd getcwd "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Getdtablesize() (size int) {
-	r0, _, _ := syscall_syscall(funcPC(libc_getdtablesize_trampoline), 0, 0, 0)
+	r0, _, _ := syscall_syscall(libc_getdtablesize_trampoline_addr, 0, 0, 0)
 	size = int(r0)
 	return
 }
 
-func libc_getdtablesize_trampoline()
+var libc_getdtablesize_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_getdtablesize getdtablesize "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Getegid() (egid int) {
-	r0, _, _ := syscall_rawSyscall(funcPC(libc_getegid_trampoline), 0, 0, 0)
+	r0, _, _ := syscall_rawSyscall(libc_getegid_trampoline_addr, 0, 0, 0)
 	egid = int(r0)
 	return
 }
 
-func libc_getegid_trampoline()
+var libc_getegid_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_getegid getegid "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Geteuid() (uid int) {
-	r0, _, _ := syscall_rawSyscall(funcPC(libc_geteuid_trampoline), 0, 0, 0)
+	r0, _, _ := syscall_rawSyscall(libc_geteuid_trampoline_addr, 0, 0, 0)
 	uid = int(r0)
 	return
 }
 
-func libc_geteuid_trampoline()
+var libc_geteuid_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_geteuid geteuid "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Getgid() (gid int) {
-	r0, _, _ := syscall_rawSyscall(funcPC(libc_getgid_trampoline), 0, 0, 0)
+	r0, _, _ := syscall_rawSyscall(libc_getgid_trampoline_addr, 0, 0, 0)
 	gid = int(r0)
 	return
 }
 
-func libc_getgid_trampoline()
+var libc_getgid_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_getgid getgid "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Getpgid(pid int) (pgid int, err error) {
-	r0, _, e1 := syscall_rawSyscall(funcPC(libc_getpgid_trampoline), uintptr(pid), 0, 0)
+	r0, _, e1 := syscall_rawSyscall(libc_getpgid_trampoline_addr, uintptr(pid), 0, 0)
 	pgid = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -1269,50 +1269,50 @@ func Getpgid(pid int) (pgid int, err error) {
 	return
 }
 
-func libc_getpgid_trampoline()
+var libc_getpgid_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_getpgid getpgid "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Getpgrp() (pgrp int) {
-	r0, _, _ := syscall_rawSyscall(funcPC(libc_getpgrp_trampoline), 0, 0, 0)
+	r0, _, _ := syscall_rawSyscall(libc_getpgrp_trampoline_addr, 0, 0, 0)
 	pgrp = int(r0)
 	return
 }
 
-func libc_getpgrp_trampoline()
+var libc_getpgrp_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_getpgrp getpgrp "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Getpid() (pid int) {
-	r0, _, _ := syscall_rawSyscall(funcPC(libc_getpid_trampoline), 0, 0, 0)
+	r0, _, _ := syscall_rawSyscall(libc_getpid_trampoline_addr, 0, 0, 0)
 	pid = int(r0)
 	return
 }
 
-func libc_getpid_trampoline()
+var libc_getpid_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_getpid getpid "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Getppid() (ppid int) {
-	r0, _, _ := syscall_rawSyscall(funcPC(libc_getppid_trampoline), 0, 0, 0)
+	r0, _, _ := syscall_rawSyscall(libc_getppid_trampoline_addr, 0, 0, 0)
 	ppid = int(r0)
 	return
 }
 
-func libc_getppid_trampoline()
+var libc_getppid_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_getppid getppid "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Getpriority(which int, who int) (prio int, err error) {
-	r0, _, e1 := syscall_syscall(funcPC(libc_getpriority_trampoline), uintptr(which), uintptr(who), 0)
+	r0, _, e1 := syscall_syscall(libc_getpriority_trampoline_addr, uintptr(which), uintptr(who), 0)
 	prio = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -1320,42 +1320,42 @@ func Getpriority(which int, who int) (prio int, err error) {
 	return
 }
 
-func libc_getpriority_trampoline()
+var libc_getpriority_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_getpriority getpriority "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Getrlimit(which int, lim *Rlimit) (err error) {
-	_, _, e1 := syscall_rawSyscall(funcPC(libc_getrlimit_trampoline), uintptr(which), uintptr(unsafe.Pointer(lim)), 0)
+	_, _, e1 := syscall_rawSyscall(libc_getrlimit_trampoline_addr, uintptr(which), uintptr(unsafe.Pointer(lim)), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_getrlimit_trampoline()
+var libc_getrlimit_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_getrlimit getrlimit "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Getrusage(who int, rusage *Rusage) (err error) {
-	_, _, e1 := syscall_rawSyscall(funcPC(libc_getrusage_trampoline), uintptr(who), uintptr(unsafe.Pointer(rusage)), 0)
+	_, _, e1 := syscall_rawSyscall(libc_getrusage_trampoline_addr, uintptr(who), uintptr(unsafe.Pointer(rusage)), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_getrusage_trampoline()
+var libc_getrusage_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_getrusage getrusage "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Getsid(pid int) (sid int, err error) {
-	r0, _, e1 := syscall_rawSyscall(funcPC(libc_getsid_trampoline), uintptr(pid), 0, 0)
+	r0, _, e1 := syscall_rawSyscall(libc_getsid_trampoline_addr, uintptr(pid), 0, 0)
 	sid = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -1363,52 +1363,52 @@ func Getsid(pid int) (sid int, err error) {
 	return
 }
 
-func libc_getsid_trampoline()
+var libc_getsid_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_getsid getsid "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Gettimeofday(tp *Timeval) (err error) {
-	_, _, e1 := syscall_rawSyscall(funcPC(libc_gettimeofday_trampoline), uintptr(unsafe.Pointer(tp)), 0, 0)
+	_, _, e1 := syscall_rawSyscall(libc_gettimeofday_trampoline_addr, uintptr(unsafe.Pointer(tp)), 0, 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_gettimeofday_trampoline()
+var libc_gettimeofday_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_gettimeofday gettimeofday "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Getuid() (uid int) {
-	r0, _, _ := syscall_rawSyscall(funcPC(libc_getuid_trampoline), 0, 0, 0)
+	r0, _, _ := syscall_rawSyscall(libc_getuid_trampoline_addr, 0, 0, 0)
 	uid = int(r0)
 	return
 }
 
-func libc_getuid_trampoline()
+var libc_getuid_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_getuid getuid "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Issetugid() (tainted bool) {
-	r0, _, _ := syscall_rawSyscall(funcPC(libc_issetugid_trampoline), 0, 0, 0)
+	r0, _, _ := syscall_rawSyscall(libc_issetugid_trampoline_addr, 0, 0, 0)
 	tainted = bool(r0 != 0)
 	return
 }
 
-func libc_issetugid_trampoline()
+var libc_issetugid_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_issetugid issetugid "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Kqueue() (fd int, err error) {
-	r0, _, e1 := syscall_syscall(funcPC(libc_kqueue_trampoline), 0, 0, 0)
+	r0, _, e1 := syscall_syscall(libc_kqueue_trampoline_addr, 0, 0, 0)
 	fd = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -1416,7 +1416,7 @@ func Kqueue() (fd int, err error) {
 	return
 }
 
-func libc_kqueue_trampoline()
+var libc_kqueue_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_kqueue kqueue "/usr/lib/libSystem.B.dylib"
 
@@ -1428,14 +1428,14 @@ func Lchown(path string, uid int, gid int) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall(funcPC(libc_lchown_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(uid), uintptr(gid))
+	_, _, e1 := syscall_syscall(libc_lchown_trampoline_addr, uintptr(unsafe.Pointer(_p0)), uintptr(uid), uintptr(gid))
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_lchown_trampoline()
+var libc_lchown_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_lchown lchown "/usr/lib/libSystem.B.dylib"
 
@@ -1452,14 +1452,14 @@ func Link(path string, link string) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall(funcPC(libc_link_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), 0)
+	_, _, e1 := syscall_syscall(libc_link_trampoline_addr, uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_link_trampoline()
+var libc_link_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_link link "/usr/lib/libSystem.B.dylib"
 
@@ -1476,28 +1476,28 @@ func Linkat(pathfd int, path string, linkfd int, link string, flags int) (err er
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall6(funcPC(libc_linkat_trampoline), uintptr(pathfd), uintptr(unsafe.Pointer(_p0)), uintptr(linkfd), uintptr(unsafe.Pointer(_p1)), uintptr(flags), 0)
+	_, _, e1 := syscall_syscall6(libc_linkat_trampoline_addr, uintptr(pathfd), uintptr(unsafe.Pointer(_p0)), uintptr(linkfd), uintptr(unsafe.Pointer(_p1)), uintptr(flags), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_linkat_trampoline()
+var libc_linkat_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_linkat linkat "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Listen(s int, backlog int) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_listen_trampoline), uintptr(s), uintptr(backlog), 0)
+	_, _, e1 := syscall_syscall(libc_listen_trampoline_addr, uintptr(s), uintptr(backlog), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_listen_trampoline()
+var libc_listen_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_listen listen "/usr/lib/libSystem.B.dylib"
 
@@ -1509,14 +1509,14 @@ func Mkdir(path string, mode uint32) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall(funcPC(libc_mkdir_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(mode), 0)
+	_, _, e1 := syscall_syscall(libc_mkdir_trampoline_addr, uintptr(unsafe.Pointer(_p0)), uintptr(mode), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_mkdir_trampoline()
+var libc_mkdir_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_mkdir mkdir "/usr/lib/libSystem.B.dylib"
 
@@ -1528,14 +1528,14 @@ func Mkdirat(dirfd int, path string, mode uint32) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall(funcPC(libc_mkdirat_trampoline), uintptr(dirfd), uintptr(unsafe.Pointer(_p0)), uintptr(mode))
+	_, _, e1 := syscall_syscall(libc_mkdirat_trampoline_addr, uintptr(dirfd), uintptr(unsafe.Pointer(_p0)), uintptr(mode))
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_mkdirat_trampoline()
+var libc_mkdirat_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_mkdirat mkdirat "/usr/lib/libSystem.B.dylib"
 
@@ -1547,14 +1547,14 @@ func Mkfifo(path string, mode uint32) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall(funcPC(libc_mkfifo_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(mode), 0)
+	_, _, e1 := syscall_syscall(libc_mkfifo_trampoline_addr, uintptr(unsafe.Pointer(_p0)), uintptr(mode), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_mkfifo_trampoline()
+var libc_mkfifo_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_mkfifo mkfifo "/usr/lib/libSystem.B.dylib"
 
@@ -1566,14 +1566,14 @@ func Mknod(path string, mode uint32, dev int) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall(funcPC(libc_mknod_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(mode), uintptr(dev))
+	_, _, e1 := syscall_syscall(libc_mknod_trampoline_addr, uintptr(unsafe.Pointer(_p0)), uintptr(mode), uintptr(dev))
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_mknod_trampoline()
+var libc_mknod_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_mknod mknod "/usr/lib/libSystem.B.dylib"
 
@@ -1585,7 +1585,7 @@ func Open(path string, mode int, perm uint32) (fd int, err error) {
 	if err != nil {
 		return
 	}
-	r0, _, e1 := syscall_syscall(funcPC(libc_open_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(mode), uintptr(perm))
+	r0, _, e1 := syscall_syscall(libc_open_trampoline_addr, uintptr(unsafe.Pointer(_p0)), uintptr(mode), uintptr(perm))
 	fd = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -1593,7 +1593,7 @@ func Open(path string, mode int, perm uint32) (fd int, err error) {
 	return
 }
 
-func libc_open_trampoline()
+var libc_open_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_open open "/usr/lib/libSystem.B.dylib"
 
@@ -1605,7 +1605,7 @@ func Openat(dirfd int, path string, mode int, perm uint32) (fd int, err error) {
 	if err != nil {
 		return
 	}
-	r0, _, e1 := syscall_syscall6(funcPC(libc_openat_trampoline), uintptr(dirfd), uintptr(unsafe.Pointer(_p0)), uintptr(mode), uintptr(perm), 0, 0)
+	r0, _, e1 := syscall_syscall6(libc_openat_trampoline_addr, uintptr(dirfd), uintptr(unsafe.Pointer(_p0)), uintptr(mode), uintptr(perm), 0, 0)
 	fd = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -1613,7 +1613,7 @@ func Openat(dirfd int, path string, mode int, perm uint32) (fd int, err error) {
 	return
 }
 
-func libc_openat_trampoline()
+var libc_openat_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_openat openat "/usr/lib/libSystem.B.dylib"
 
@@ -1625,7 +1625,7 @@ func Pathconf(path string, name int) (val int, err error) {
 	if err != nil {
 		return
 	}
-	r0, _, e1 := syscall_syscall(funcPC(libc_pathconf_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(name), 0)
+	r0, _, e1 := syscall_syscall(libc_pathconf_trampoline_addr, uintptr(unsafe.Pointer(_p0)), uintptr(name), 0)
 	val = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -1633,7 +1633,7 @@ func Pathconf(path string, name int) (val int, err error) {
 	return
 }
 
-func libc_pathconf_trampoline()
+var libc_pathconf_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_pathconf pathconf "/usr/lib/libSystem.B.dylib"
 
@@ -1646,7 +1646,7 @@ func Pread(fd int, p []byte, offset int64) (n int, err error) {
 	} else {
 		_p0 = unsafe.Pointer(&_zero)
 	}
-	r0, _, e1 := syscall_syscall6(funcPC(libc_pread_trampoline), uintptr(fd), uintptr(_p0), uintptr(len(p)), uintptr(offset), 0, 0)
+	r0, _, e1 := syscall_syscall6(libc_pread_trampoline_addr, uintptr(fd), uintptr(_p0), uintptr(len(p)), uintptr(offset), 0, 0)
 	n = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -1654,7 +1654,7 @@ func Pread(fd int, p []byte, offset int64) (n int, err error) {
 	return
 }
 
-func libc_pread_trampoline()
+var libc_pread_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_pread pread "/usr/lib/libSystem.B.dylib"
 
@@ -1667,7 +1667,7 @@ func Pwrite(fd int, p []byte, offset int64) (n int, err error) {
 	} else {
 		_p0 = unsafe.Pointer(&_zero)
 	}
-	r0, _, e1 := syscall_syscall6(funcPC(libc_pwrite_trampoline), uintptr(fd), uintptr(_p0), uintptr(len(p)), uintptr(offset), 0, 0)
+	r0, _, e1 := syscall_syscall6(libc_pwrite_trampoline_addr, uintptr(fd), uintptr(_p0), uintptr(len(p)), uintptr(offset), 0, 0)
 	n = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -1675,7 +1675,7 @@ func Pwrite(fd int, p []byte, offset int64) (n int, err error) {
 	return
 }
 
-func libc_pwrite_trampoline()
+var libc_pwrite_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_pwrite pwrite "/usr/lib/libSystem.B.dylib"
 
@@ -1688,7 +1688,7 @@ func read(fd int, p []byte) (n int, err error) {
 	} else {
 		_p0 = unsafe.Pointer(&_zero)
 	}
-	r0, _, e1 := syscall_syscall(funcPC(libc_read_trampoline), uintptr(fd), uintptr(_p0), uintptr(len(p)))
+	r0, _, e1 := syscall_syscall(libc_read_trampoline_addr, uintptr(fd), uintptr(_p0), uintptr(len(p)))
 	n = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -1696,7 +1696,7 @@ func read(fd int, p []byte) (n int, err error) {
 	return
 }
 
-func libc_read_trampoline()
+var libc_read_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_read read "/usr/lib/libSystem.B.dylib"
 
@@ -1714,7 +1714,7 @@ func Readlink(path string, buf []byte) (n int, err error) {
 	} else {
 		_p1 = unsafe.Pointer(&_zero)
 	}
-	r0, _, e1 := syscall_syscall(funcPC(libc_readlink_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(_p1), uintptr(len(buf)))
+	r0, _, e1 := syscall_syscall(libc_readlink_trampoline_addr, uintptr(unsafe.Pointer(_p0)), uintptr(_p1), uintptr(len(buf)))
 	n = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -1722,7 +1722,7 @@ func Readlink(path string, buf []byte) (n int, err error) {
 	return
 }
 
-func libc_readlink_trampoline()
+var libc_readlink_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_readlink readlink "/usr/lib/libSystem.B.dylib"
 
@@ -1740,7 +1740,7 @@ func Readlinkat(dirfd int, path string, buf []byte) (n int, err error) {
 	} else {
 		_p1 = unsafe.Pointer(&_zero)
 	}
-	r0, _, e1 := syscall_syscall6(funcPC(libc_readlinkat_trampoline), uintptr(dirfd), uintptr(unsafe.Pointer(_p0)), uintptr(_p1), uintptr(len(buf)), 0, 0)
+	r0, _, e1 := syscall_syscall6(libc_readlinkat_trampoline_addr, uintptr(dirfd), uintptr(unsafe.Pointer(_p0)), uintptr(_p1), uintptr(len(buf)), 0, 0)
 	n = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -1748,7 +1748,7 @@ func Readlinkat(dirfd int, path string, buf []byte) (n int, err error) {
 	return
 }
 
-func libc_readlinkat_trampoline()
+var libc_readlinkat_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_readlinkat readlinkat "/usr/lib/libSystem.B.dylib"
 
@@ -1765,14 +1765,14 @@ func Rename(from string, to string) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall(funcPC(libc_rename_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), 0)
+	_, _, e1 := syscall_syscall(libc_rename_trampoline_addr, uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_rename_trampoline()
+var libc_rename_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_rename rename "/usr/lib/libSystem.B.dylib"
 
@@ -1789,14 +1789,14 @@ func Renameat(fromfd int, from string, tofd int, to string) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall6(funcPC(libc_renameat_trampoline), uintptr(fromfd), uintptr(unsafe.Pointer(_p0)), uintptr(tofd), uintptr(unsafe.Pointer(_p1)), 0, 0)
+	_, _, e1 := syscall_syscall6(libc_renameat_trampoline_addr, uintptr(fromfd), uintptr(unsafe.Pointer(_p0)), uintptr(tofd), uintptr(unsafe.Pointer(_p1)), 0, 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_renameat_trampoline()
+var libc_renameat_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_renameat renameat "/usr/lib/libSystem.B.dylib"
 
@@ -1808,14 +1808,14 @@ func Revoke(path string) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall(funcPC(libc_revoke_trampoline), uintptr(unsafe.Pointer(_p0)), 0, 0)
+	_, _, e1 := syscall_syscall(libc_revoke_trampoline_addr, uintptr(unsafe.Pointer(_p0)), 0, 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_revoke_trampoline()
+var libc_revoke_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_revoke revoke "/usr/lib/libSystem.B.dylib"
 
@@ -1827,21 +1827,21 @@ func Rmdir(path string) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall(funcPC(libc_rmdir_trampoline), uintptr(unsafe.Pointer(_p0)), 0, 0)
+	_, _, e1 := syscall_syscall(libc_rmdir_trampoline_addr, uintptr(unsafe.Pointer(_p0)), 0, 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_rmdir_trampoline()
+var libc_rmdir_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_rmdir rmdir "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Seek(fd int, offset int64, whence int) (newoffset int64, err error) {
-	r0, _, e1 := syscall_syscall(funcPC(libc_lseek_trampoline), uintptr(fd), uintptr(offset), uintptr(whence))
+	r0, _, e1 := syscall_syscall(libc_lseek_trampoline_addr, uintptr(fd), uintptr(offset), uintptr(whence))
 	newoffset = int64(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -1849,14 +1849,14 @@ func Seek(fd int, offset int64, whence int) (newoffset int64, err error) {
 	return
 }
 
-func libc_lseek_trampoline()
+var libc_lseek_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_lseek lseek "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error) {
-	r0, _, e1 := syscall_syscall6(funcPC(libc_select_trampoline), uintptr(nfd), uintptr(unsafe.Pointer(r)), uintptr(unsafe.Pointer(w)), uintptr(unsafe.Pointer(e)), uintptr(unsafe.Pointer(timeout)), 0)
+	r0, _, e1 := syscall_syscall6(libc_select_trampoline_addr, uintptr(nfd), uintptr(unsafe.Pointer(r)), uintptr(unsafe.Pointer(w)), uintptr(unsafe.Pointer(e)), uintptr(unsafe.Pointer(timeout)), 0)
 	n = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -1864,49 +1864,49 @@ func Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err
 	return
 }
 
-func libc_select_trampoline()
+var libc_select_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_select select "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Setegid(egid int) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_setegid_trampoline), uintptr(egid), 0, 0)
+	_, _, e1 := syscall_syscall(libc_setegid_trampoline_addr, uintptr(egid), 0, 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_setegid_trampoline()
+var libc_setegid_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_setegid setegid "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Seteuid(euid int) (err error) {
-	_, _, e1 := syscall_rawSyscall(funcPC(libc_seteuid_trampoline), uintptr(euid), 0, 0)
+	_, _, e1 := syscall_rawSyscall(libc_seteuid_trampoline_addr, uintptr(euid), 0, 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_seteuid_trampoline()
+var libc_seteuid_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_seteuid seteuid "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Setgid(gid int) (err error) {
-	_, _, e1 := syscall_rawSyscall(funcPC(libc_setgid_trampoline), uintptr(gid), 0, 0)
+	_, _, e1 := syscall_rawSyscall(libc_setgid_trampoline_addr, uintptr(gid), 0, 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_setgid_trampoline()
+var libc_setgid_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_setgid setgid "/usr/lib/libSystem.B.dylib"
 
@@ -1918,105 +1918,105 @@ func Setlogin(name string) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall(funcPC(libc_setlogin_trampoline), uintptr(unsafe.Pointer(_p0)), 0, 0)
+	_, _, e1 := syscall_syscall(libc_setlogin_trampoline_addr, uintptr(unsafe.Pointer(_p0)), 0, 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_setlogin_trampoline()
+var libc_setlogin_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_setlogin setlogin "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Setpgid(pid int, pgid int) (err error) {
-	_, _, e1 := syscall_rawSyscall(funcPC(libc_setpgid_trampoline), uintptr(pid), uintptr(pgid), 0)
+	_, _, e1 := syscall_rawSyscall(libc_setpgid_trampoline_addr, uintptr(pid), uintptr(pgid), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_setpgid_trampoline()
+var libc_setpgid_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_setpgid setpgid "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Setpriority(which int, who int, prio int) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_setpriority_trampoline), uintptr(which), uintptr(who), uintptr(prio))
+	_, _, e1 := syscall_syscall(libc_setpriority_trampoline_addr, uintptr(which), uintptr(who), uintptr(prio))
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_setpriority_trampoline()
+var libc_setpriority_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_setpriority setpriority "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Setprivexec(flag int) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_setprivexec_trampoline), uintptr(flag), 0, 0)
+	_, _, e1 := syscall_syscall(libc_setprivexec_trampoline_addr, uintptr(flag), 0, 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_setprivexec_trampoline()
+var libc_setprivexec_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_setprivexec setprivexec "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Setregid(rgid int, egid int) (err error) {
-	_, _, e1 := syscall_rawSyscall(funcPC(libc_setregid_trampoline), uintptr(rgid), uintptr(egid), 0)
+	_, _, e1 := syscall_rawSyscall(libc_setregid_trampoline_addr, uintptr(rgid), uintptr(egid), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_setregid_trampoline()
+var libc_setregid_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_setregid setregid "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Setreuid(ruid int, euid int) (err error) {
-	_, _, e1 := syscall_rawSyscall(funcPC(libc_setreuid_trampoline), uintptr(ruid), uintptr(euid), 0)
+	_, _, e1 := syscall_rawSyscall(libc_setreuid_trampoline_addr, uintptr(ruid), uintptr(euid), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_setreuid_trampoline()
+var libc_setreuid_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_setreuid setreuid "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Setrlimit(which int, lim *Rlimit) (err error) {
-	_, _, e1 := syscall_rawSyscall(funcPC(libc_setrlimit_trampoline), uintptr(which), uintptr(unsafe.Pointer(lim)), 0)
+	_, _, e1 := syscall_rawSyscall(libc_setrlimit_trampoline_addr, uintptr(which), uintptr(unsafe.Pointer(lim)), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_setrlimit_trampoline()
+var libc_setrlimit_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_setrlimit setrlimit "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Setsid() (pid int, err error) {
-	r0, _, e1 := syscall_rawSyscall(funcPC(libc_setsid_trampoline), 0, 0, 0)
+	r0, _, e1 := syscall_rawSyscall(libc_setsid_trampoline_addr, 0, 0, 0)
 	pid = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -2024,35 +2024,35 @@ func Setsid() (pid int, err error) {
 	return
 }
 
-func libc_setsid_trampoline()
+var libc_setsid_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_setsid setsid "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Settimeofday(tp *Timeval) (err error) {
-	_, _, e1 := syscall_rawSyscall(funcPC(libc_settimeofday_trampoline), uintptr(unsafe.Pointer(tp)), 0, 0)
+	_, _, e1 := syscall_rawSyscall(libc_settimeofday_trampoline_addr, uintptr(unsafe.Pointer(tp)), 0, 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_settimeofday_trampoline()
+var libc_settimeofday_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_settimeofday settimeofday "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Setuid(uid int) (err error) {
-	_, _, e1 := syscall_rawSyscall(funcPC(libc_setuid_trampoline), uintptr(uid), 0, 0)
+	_, _, e1 := syscall_rawSyscall(libc_setuid_trampoline_addr, uintptr(uid), 0, 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_setuid_trampoline()
+var libc_setuid_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_setuid setuid "/usr/lib/libSystem.B.dylib"
 
@@ -2069,14 +2069,14 @@ func Symlink(path string, link string) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall(funcPC(libc_symlink_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), 0)
+	_, _, e1 := syscall_syscall(libc_symlink_trampoline_addr, uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_symlink_trampoline()
+var libc_symlink_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_symlink symlink "/usr/lib/libSystem.B.dylib"
 
@@ -2093,28 +2093,28 @@ func Symlinkat(oldpath string, newdirfd int, newpath string) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall(funcPC(libc_symlinkat_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(newdirfd), uintptr(unsafe.Pointer(_p1)))
+	_, _, e1 := syscall_syscall(libc_symlinkat_trampoline_addr, uintptr(unsafe.Pointer(_p0)), uintptr(newdirfd), uintptr(unsafe.Pointer(_p1)))
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_symlinkat_trampoline()
+var libc_symlinkat_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_symlinkat symlinkat "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Sync() (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_sync_trampoline), 0, 0, 0)
+	_, _, e1 := syscall_syscall(libc_sync_trampoline_addr, 0, 0, 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_sync_trampoline()
+var libc_sync_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_sync sync "/usr/lib/libSystem.B.dylib"
 
@@ -2126,26 +2126,26 @@ func Truncate(path string, length int64) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall(funcPC(libc_truncate_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(length), 0)
+	_, _, e1 := syscall_syscall(libc_truncate_trampoline_addr, uintptr(unsafe.Pointer(_p0)), uintptr(length), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_truncate_trampoline()
+var libc_truncate_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_truncate truncate "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Umask(newmask int) (oldmask int) {
-	r0, _, _ := syscall_syscall(funcPC(libc_umask_trampoline), uintptr(newmask), 0, 0)
+	r0, _, _ := syscall_syscall(libc_umask_trampoline_addr, uintptr(newmask), 0, 0)
 	oldmask = int(r0)
 	return
 }
 
-func libc_umask_trampoline()
+var libc_umask_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_umask umask "/usr/lib/libSystem.B.dylib"
 
@@ -2157,14 +2157,14 @@ func Undelete(path string) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall(funcPC(libc_undelete_trampoline), uintptr(unsafe.Pointer(_p0)), 0, 0)
+	_, _, e1 := syscall_syscall(libc_undelete_trampoline_addr, uintptr(unsafe.Pointer(_p0)), 0, 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_undelete_trampoline()
+var libc_undelete_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_undelete undelete "/usr/lib/libSystem.B.dylib"
 
@@ -2176,14 +2176,14 @@ func Unlink(path string) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall(funcPC(libc_unlink_trampoline), uintptr(unsafe.Pointer(_p0)), 0, 0)
+	_, _, e1 := syscall_syscall(libc_unlink_trampoline_addr, uintptr(unsafe.Pointer(_p0)), 0, 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_unlink_trampoline()
+var libc_unlink_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_unlink unlink "/usr/lib/libSystem.B.dylib"
 
@@ -2195,14 +2195,14 @@ func Unlinkat(dirfd int, path string, flags int) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall(funcPC(libc_unlinkat_trampoline), uintptr(dirfd), uintptr(unsafe.Pointer(_p0)), uintptr(flags))
+	_, _, e1 := syscall_syscall(libc_unlinkat_trampoline_addr, uintptr(dirfd), uintptr(unsafe.Pointer(_p0)), uintptr(flags))
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_unlinkat_trampoline()
+var libc_unlinkat_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_unlinkat unlinkat "/usr/lib/libSystem.B.dylib"
 
@@ -2214,14 +2214,14 @@ func Unmount(path string, flags int) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall(funcPC(libc_unmount_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(flags), 0)
+	_, _, e1 := syscall_syscall(libc_unmount_trampoline_addr, uintptr(unsafe.Pointer(_p0)), uintptr(flags), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_unmount_trampoline()
+var libc_unmount_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_unmount unmount "/usr/lib/libSystem.B.dylib"
 
@@ -2234,7 +2234,7 @@ func write(fd int, p []byte) (n int, err error) {
 	} else {
 		_p0 = unsafe.Pointer(&_zero)
 	}
-	r0, _, e1 := syscall_syscall(funcPC(libc_write_trampoline), uintptr(fd), uintptr(_p0), uintptr(len(p)))
+	r0, _, e1 := syscall_syscall(libc_write_trampoline_addr, uintptr(fd), uintptr(_p0), uintptr(len(p)))
 	n = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -2242,14 +2242,14 @@ func write(fd int, p []byte) (n int, err error) {
 	return
 }
 
-func libc_write_trampoline()
+var libc_write_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_write write "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func mmap(addr uintptr, length uintptr, prot int, flag int, fd int, pos int64) (ret uintptr, err error) {
-	r0, _, e1 := syscall_syscall6(funcPC(libc_mmap_trampoline), uintptr(addr), uintptr(length), uintptr(prot), uintptr(flag), uintptr(fd), uintptr(pos))
+	r0, _, e1 := syscall_syscall6(libc_mmap_trampoline_addr, uintptr(addr), uintptr(length), uintptr(prot), uintptr(flag), uintptr(fd), uintptr(pos))
 	ret = uintptr(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -2257,28 +2257,28 @@ func mmap(addr uintptr, length uintptr, prot int, flag int, fd int, pos int64) (
 	return
 }
 
-func libc_mmap_trampoline()
+var libc_mmap_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_mmap mmap "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func munmap(addr uintptr, length uintptr) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_munmap_trampoline), uintptr(addr), uintptr(length), 0)
+	_, _, e1 := syscall_syscall(libc_munmap_trampoline_addr, uintptr(addr), uintptr(length), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_munmap_trampoline()
+var libc_munmap_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_munmap munmap "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func readlen(fd int, buf *byte, nbuf int) (n int, err error) {
-	r0, _, e1 := syscall_syscall(funcPC(libc_read_trampoline), uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf))
+	r0, _, e1 := syscall_syscall(libc_read_trampoline_addr, uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf))
 	n = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -2289,7 +2289,7 @@ func readlen(fd int, buf *byte, nbuf int) (n int, err error) {
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func writelen(fd int, buf *byte, nbuf int) (n int, err error) {
-	r0, _, e1 := syscall_syscall(funcPC(libc_write_trampoline), uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf))
+	r0, _, e1 := syscall_syscall(libc_write_trampoline_addr, uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf))
 	n = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -2300,14 +2300,14 @@ func writelen(fd int, buf *byte, nbuf int) (n int, err error) {
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Fstat(fd int, stat *Stat_t) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_fstat64_trampoline), uintptr(fd), uintptr(unsafe.Pointer(stat)), 0)
+	_, _, e1 := syscall_syscall(libc_fstat64_trampoline_addr, uintptr(fd), uintptr(unsafe.Pointer(stat)), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_fstat64_trampoline()
+var libc_fstat64_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_fstat64 fstat64 "/usr/lib/libSystem.B.dylib"
 
@@ -2319,35 +2319,35 @@ func Fstatat(fd int, path string, stat *Stat_t, flags int) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall6(funcPC(libc_fstatat64_trampoline), uintptr(fd), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(stat)), uintptr(flags), 0, 0)
+	_, _, e1 := syscall_syscall6(libc_fstatat64_trampoline_addr, uintptr(fd), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(stat)), uintptr(flags), 0, 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_fstatat64_trampoline()
+var libc_fstatat64_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_fstatat64 fstatat64 "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Fstatfs(fd int, stat *Statfs_t) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_fstatfs64_trampoline), uintptr(fd), uintptr(unsafe.Pointer(stat)), 0)
+	_, _, e1 := syscall_syscall(libc_fstatfs64_trampoline_addr, uintptr(fd), uintptr(unsafe.Pointer(stat)), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_fstatfs64_trampoline()
+var libc_fstatfs64_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_fstatfs64 fstatfs64 "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func getfsstat(buf unsafe.Pointer, size uintptr, flags int) (n int, err error) {
-	r0, _, e1 := syscall_syscall(funcPC(libc_getfsstat64_trampoline), uintptr(buf), uintptr(size), uintptr(flags))
+	r0, _, e1 := syscall_syscall(libc_getfsstat64_trampoline_addr, uintptr(buf), uintptr(size), uintptr(flags))
 	n = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -2355,7 +2355,7 @@ func getfsstat(buf unsafe.Pointer, size uintptr, flags int) (n int, err error) {
 	return
 }
 
-func libc_getfsstat64_trampoline()
+var libc_getfsstat64_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_getfsstat64 getfsstat64 "/usr/lib/libSystem.B.dylib"
 
@@ -2367,28 +2367,28 @@ func Lstat(path string, stat *Stat_t) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall(funcPC(libc_lstat64_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(stat)), 0)
+	_, _, e1 := syscall_syscall(libc_lstat64_trampoline_addr, uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(stat)), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_lstat64_trampoline()
+var libc_lstat64_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_lstat64 lstat64 "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func ptrace1(request int, pid int, addr uintptr, data uintptr) (err error) {
-	_, _, e1 := syscall_syscall6(funcPC(libc_ptrace_trampoline), uintptr(request), uintptr(pid), uintptr(addr), uintptr(data), 0, 0)
+	_, _, e1 := syscall_syscall6(libc_ptrace_trampoline_addr, uintptr(request), uintptr(pid), uintptr(addr), uintptr(data), 0, 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_ptrace_trampoline()
+var libc_ptrace_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_ptrace ptrace "/usr/lib/libSystem.B.dylib"
 
@@ -2400,14 +2400,14 @@ func Stat(path string, stat *Stat_t) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall(funcPC(libc_stat64_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(stat)), 0)
+	_, _, e1 := syscall_syscall(libc_stat64_trampoline_addr, uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(stat)), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_stat64_trampoline()
+var libc_stat64_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_stat64 stat64 "/usr/lib/libSystem.B.dylib"
 
@@ -2419,13 +2419,13 @@ func Statfs(path string, stat *Statfs_t) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall(funcPC(libc_statfs64_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(stat)), 0)
+	_, _, e1 := syscall_syscall(libc_statfs64_trampoline_addr, uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(stat)), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_statfs64_trampoline()
+var libc_statfs64_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_statfs64 statfs64 "/usr/lib/libSystem.B.dylib"
diff --git a/src/cmd/vendor/golang.org/x/sys/unix/zsyscall_darwin_amd64.s b/src/cmd/vendor/golang.org/x/sys/unix/zsyscall_darwin_amd64.s
index b8f316e676..bc169c2ab9 100644
--- a/src/cmd/vendor/golang.org/x/sys/unix/zsyscall_darwin_amd64.s
+++ b/src/cmd/vendor/golang.org/x/sys/unix/zsyscall_darwin_amd64.s
@@ -5,287 +5,855 @@
 // +build go1.12
 
 #include "textflag.h"
-TEXT ·libc_getgroups_trampoline(SB),NOSPLIT,$0-0
+
+TEXT libc_getgroups_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_getgroups(SB)
-TEXT ·libc_setgroups_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_getgroups_trampoline_addr(SB), RODATA, $8
+DATA	·libc_getgroups_trampoline_addr(SB)/8, $libc_getgroups_trampoline<>(SB)
+
+TEXT libc_setgroups_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_setgroups(SB)
-TEXT ·libc_wait4_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_setgroups_trampoline_addr(SB), RODATA, $8
+DATA	·libc_setgroups_trampoline_addr(SB)/8, $libc_setgroups_trampoline<>(SB)
+
+TEXT libc_wait4_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_wait4(SB)
-TEXT ·libc_accept_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_wait4_trampoline_addr(SB), RODATA, $8
+DATA	·libc_wait4_trampoline_addr(SB)/8, $libc_wait4_trampoline<>(SB)
+
+TEXT libc_accept_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_accept(SB)
-TEXT ·libc_bind_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_accept_trampoline_addr(SB), RODATA, $8
+DATA	·libc_accept_trampoline_addr(SB)/8, $libc_accept_trampoline<>(SB)
+
+TEXT libc_bind_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_bind(SB)
-TEXT ·libc_connect_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_bind_trampoline_addr(SB), RODATA, $8
+DATA	·libc_bind_trampoline_addr(SB)/8, $libc_bind_trampoline<>(SB)
+
+TEXT libc_connect_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_connect(SB)
-TEXT ·libc_socket_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_connect_trampoline_addr(SB), RODATA, $8
+DATA	·libc_connect_trampoline_addr(SB)/8, $libc_connect_trampoline<>(SB)
+
+TEXT libc_socket_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_socket(SB)
-TEXT ·libc_getsockopt_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_socket_trampoline_addr(SB), RODATA, $8
+DATA	·libc_socket_trampoline_addr(SB)/8, $libc_socket_trampoline<>(SB)
+
+TEXT libc_getsockopt_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_getsockopt(SB)
-TEXT ·libc_setsockopt_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_getsockopt_trampoline_addr(SB), RODATA, $8
+DATA	·libc_getsockopt_trampoline_addr(SB)/8, $libc_getsockopt_trampoline<>(SB)
+
+TEXT libc_setsockopt_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_setsockopt(SB)
-TEXT ·libc_getpeername_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_setsockopt_trampoline_addr(SB), RODATA, $8
+DATA	·libc_setsockopt_trampoline_addr(SB)/8, $libc_setsockopt_trampoline<>(SB)
+
+TEXT libc_getpeername_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_getpeername(SB)
-TEXT ·libc_getsockname_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_getpeername_trampoline_addr(SB), RODATA, $8
+DATA	·libc_getpeername_trampoline_addr(SB)/8, $libc_getpeername_trampoline<>(SB)
+
+TEXT libc_getsockname_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_getsockname(SB)
-TEXT ·libc_shutdown_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_getsockname_trampoline_addr(SB), RODATA, $8
+DATA	·libc_getsockname_trampoline_addr(SB)/8, $libc_getsockname_trampoline<>(SB)
+
+TEXT libc_shutdown_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_shutdown(SB)
-TEXT ·libc_socketpair_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_shutdown_trampoline_addr(SB), RODATA, $8
+DATA	·libc_shutdown_trampoline_addr(SB)/8, $libc_shutdown_trampoline<>(SB)
+
+TEXT libc_socketpair_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_socketpair(SB)
-TEXT ·libc_recvfrom_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_socketpair_trampoline_addr(SB), RODATA, $8
+DATA	·libc_socketpair_trampoline_addr(SB)/8, $libc_socketpair_trampoline<>(SB)
+
+TEXT libc_recvfrom_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_recvfrom(SB)
-TEXT ·libc_sendto_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_recvfrom_trampoline_addr(SB), RODATA, $8
+DATA	·libc_recvfrom_trampoline_addr(SB)/8, $libc_recvfrom_trampoline<>(SB)
+
+TEXT libc_sendto_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_sendto(SB)
-TEXT ·libc_recvmsg_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_sendto_trampoline_addr(SB), RODATA, $8
+DATA	·libc_sendto_trampoline_addr(SB)/8, $libc_sendto_trampoline<>(SB)
+
+TEXT libc_recvmsg_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_recvmsg(SB)
-TEXT ·libc_sendmsg_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_recvmsg_trampoline_addr(SB), RODATA, $8
+DATA	·libc_recvmsg_trampoline_addr(SB)/8, $libc_recvmsg_trampoline<>(SB)
+
+TEXT libc_sendmsg_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_sendmsg(SB)
-TEXT ·libc_kevent_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_sendmsg_trampoline_addr(SB), RODATA, $8
+DATA	·libc_sendmsg_trampoline_addr(SB)/8, $libc_sendmsg_trampoline<>(SB)
+
+TEXT libc_kevent_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_kevent(SB)
-TEXT ·libc_utimes_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_kevent_trampoline_addr(SB), RODATA, $8
+DATA	·libc_kevent_trampoline_addr(SB)/8, $libc_kevent_trampoline<>(SB)
+
+TEXT libc_utimes_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_utimes(SB)
-TEXT ·libc_futimes_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_utimes_trampoline_addr(SB), RODATA, $8
+DATA	·libc_utimes_trampoline_addr(SB)/8, $libc_utimes_trampoline<>(SB)
+
+TEXT libc_futimes_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_futimes(SB)
-TEXT ·libc_poll_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_futimes_trampoline_addr(SB), RODATA, $8
+DATA	·libc_futimes_trampoline_addr(SB)/8, $libc_futimes_trampoline<>(SB)
+
+TEXT libc_poll_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_poll(SB)
-TEXT ·libc_madvise_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_poll_trampoline_addr(SB), RODATA, $8
+DATA	·libc_poll_trampoline_addr(SB)/8, $libc_poll_trampoline<>(SB)
+
+TEXT libc_madvise_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_madvise(SB)
-TEXT ·libc_mlock_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_madvise_trampoline_addr(SB), RODATA, $8
+DATA	·libc_madvise_trampoline_addr(SB)/8, $libc_madvise_trampoline<>(SB)
+
+TEXT libc_mlock_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_mlock(SB)
-TEXT ·libc_mlockall_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_mlock_trampoline_addr(SB), RODATA, $8
+DATA	·libc_mlock_trampoline_addr(SB)/8, $libc_mlock_trampoline<>(SB)
+
+TEXT libc_mlockall_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_mlockall(SB)
-TEXT ·libc_mprotect_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_mlockall_trampoline_addr(SB), RODATA, $8
+DATA	·libc_mlockall_trampoline_addr(SB)/8, $libc_mlockall_trampoline<>(SB)
+
+TEXT libc_mprotect_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_mprotect(SB)
-TEXT ·libc_msync_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_mprotect_trampoline_addr(SB), RODATA, $8
+DATA	·libc_mprotect_trampoline_addr(SB)/8, $libc_mprotect_trampoline<>(SB)
+
+TEXT libc_msync_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_msync(SB)
-TEXT ·libc_munlock_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_msync_trampoline_addr(SB), RODATA, $8
+DATA	·libc_msync_trampoline_addr(SB)/8, $libc_msync_trampoline<>(SB)
+
+TEXT libc_munlock_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_munlock(SB)
-TEXT ·libc_munlockall_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_munlock_trampoline_addr(SB), RODATA, $8
+DATA	·libc_munlock_trampoline_addr(SB)/8, $libc_munlock_trampoline<>(SB)
+
+TEXT libc_munlockall_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_munlockall(SB)
-TEXT ·libc_pipe_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_munlockall_trampoline_addr(SB), RODATA, $8
+DATA	·libc_munlockall_trampoline_addr(SB)/8, $libc_munlockall_trampoline<>(SB)
+
+TEXT libc_pipe_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_pipe(SB)
-TEXT ·libc_getxattr_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_pipe_trampoline_addr(SB), RODATA, $8
+DATA	·libc_pipe_trampoline_addr(SB)/8, $libc_pipe_trampoline<>(SB)
+
+TEXT libc_getxattr_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_getxattr(SB)
-TEXT ·libc_fgetxattr_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_getxattr_trampoline_addr(SB), RODATA, $8
+DATA	·libc_getxattr_trampoline_addr(SB)/8, $libc_getxattr_trampoline<>(SB)
+
+TEXT libc_fgetxattr_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_fgetxattr(SB)
-TEXT ·libc_setxattr_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_fgetxattr_trampoline_addr(SB), RODATA, $8
+DATA	·libc_fgetxattr_trampoline_addr(SB)/8, $libc_fgetxattr_trampoline<>(SB)
+
+TEXT libc_setxattr_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_setxattr(SB)
-TEXT ·libc_fsetxattr_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_setxattr_trampoline_addr(SB), RODATA, $8
+DATA	·libc_setxattr_trampoline_addr(SB)/8, $libc_setxattr_trampoline<>(SB)
+
+TEXT libc_fsetxattr_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_fsetxattr(SB)
-TEXT ·libc_removexattr_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_fsetxattr_trampoline_addr(SB), RODATA, $8
+DATA	·libc_fsetxattr_trampoline_addr(SB)/8, $libc_fsetxattr_trampoline<>(SB)
+
+TEXT libc_removexattr_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_removexattr(SB)
-TEXT ·libc_fremovexattr_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_removexattr_trampoline_addr(SB), RODATA, $8
+DATA	·libc_removexattr_trampoline_addr(SB)/8, $libc_removexattr_trampoline<>(SB)
+
+TEXT libc_fremovexattr_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_fremovexattr(SB)
-TEXT ·libc_listxattr_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_fremovexattr_trampoline_addr(SB), RODATA, $8
+DATA	·libc_fremovexattr_trampoline_addr(SB)/8, $libc_fremovexattr_trampoline<>(SB)
+
+TEXT libc_listxattr_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_listxattr(SB)
-TEXT ·libc_flistxattr_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_listxattr_trampoline_addr(SB), RODATA, $8
+DATA	·libc_listxattr_trampoline_addr(SB)/8, $libc_listxattr_trampoline<>(SB)
+
+TEXT libc_flistxattr_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_flistxattr(SB)
-TEXT ·libc_setattrlist_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_flistxattr_trampoline_addr(SB), RODATA, $8
+DATA	·libc_flistxattr_trampoline_addr(SB)/8, $libc_flistxattr_trampoline<>(SB)
+
+TEXT libc_setattrlist_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_setattrlist(SB)
-TEXT ·libc_fcntl_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_setattrlist_trampoline_addr(SB), RODATA, $8
+DATA	·libc_setattrlist_trampoline_addr(SB)/8, $libc_setattrlist_trampoline<>(SB)
+
+TEXT libc_fcntl_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_fcntl(SB)
-TEXT ·libc_kill_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_fcntl_trampoline_addr(SB), RODATA, $8
+DATA	·libc_fcntl_trampoline_addr(SB)/8, $libc_fcntl_trampoline<>(SB)
+
+TEXT libc_kill_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_kill(SB)
-TEXT ·libc_ioctl_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_kill_trampoline_addr(SB), RODATA, $8
+DATA	·libc_kill_trampoline_addr(SB)/8, $libc_kill_trampoline<>(SB)
+
+TEXT libc_ioctl_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_ioctl(SB)
-TEXT ·libc_sysctl_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_ioctl_trampoline_addr(SB), RODATA, $8
+DATA	·libc_ioctl_trampoline_addr(SB)/8, $libc_ioctl_trampoline<>(SB)
+
+TEXT libc_sysctl_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_sysctl(SB)
-TEXT ·libc_sendfile_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_sysctl_trampoline_addr(SB), RODATA, $8
+DATA	·libc_sysctl_trampoline_addr(SB)/8, $libc_sysctl_trampoline<>(SB)
+
+TEXT libc_sendfile_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_sendfile(SB)
-TEXT ·libc_access_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_sendfile_trampoline_addr(SB), RODATA, $8
+DATA	·libc_sendfile_trampoline_addr(SB)/8, $libc_sendfile_trampoline<>(SB)
+
+TEXT libc_access_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_access(SB)
-TEXT ·libc_adjtime_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_access_trampoline_addr(SB), RODATA, $8
+DATA	·libc_access_trampoline_addr(SB)/8, $libc_access_trampoline<>(SB)
+
+TEXT libc_adjtime_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_adjtime(SB)
-TEXT ·libc_chdir_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_adjtime_trampoline_addr(SB), RODATA, $8
+DATA	·libc_adjtime_trampoline_addr(SB)/8, $libc_adjtime_trampoline<>(SB)
+
+TEXT libc_chdir_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_chdir(SB)
-TEXT ·libc_chflags_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_chdir_trampoline_addr(SB), RODATA, $8
+DATA	·libc_chdir_trampoline_addr(SB)/8, $libc_chdir_trampoline<>(SB)
+
+TEXT libc_chflags_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_chflags(SB)
-TEXT ·libc_chmod_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_chflags_trampoline_addr(SB), RODATA, $8
+DATA	·libc_chflags_trampoline_addr(SB)/8, $libc_chflags_trampoline<>(SB)
+
+TEXT libc_chmod_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_chmod(SB)
-TEXT ·libc_chown_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_chmod_trampoline_addr(SB), RODATA, $8
+DATA	·libc_chmod_trampoline_addr(SB)/8, $libc_chmod_trampoline<>(SB)
+
+TEXT libc_chown_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_chown(SB)
-TEXT ·libc_chroot_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_chown_trampoline_addr(SB), RODATA, $8
+DATA	·libc_chown_trampoline_addr(SB)/8, $libc_chown_trampoline<>(SB)
+
+TEXT libc_chroot_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_chroot(SB)
-TEXT ·libc_clock_gettime_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_chroot_trampoline_addr(SB), RODATA, $8
+DATA	·libc_chroot_trampoline_addr(SB)/8, $libc_chroot_trampoline<>(SB)
+
+TEXT libc_clock_gettime_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_clock_gettime(SB)
-TEXT ·libc_close_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_clock_gettime_trampoline_addr(SB), RODATA, $8
+DATA	·libc_clock_gettime_trampoline_addr(SB)/8, $libc_clock_gettime_trampoline<>(SB)
+
+TEXT libc_close_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_close(SB)
-TEXT ·libc_clonefile_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_close_trampoline_addr(SB), RODATA, $8
+DATA	·libc_close_trampoline_addr(SB)/8, $libc_close_trampoline<>(SB)
+
+TEXT libc_clonefile_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_clonefile(SB)
-TEXT ·libc_clonefileat_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_clonefile_trampoline_addr(SB), RODATA, $8
+DATA	·libc_clonefile_trampoline_addr(SB)/8, $libc_clonefile_trampoline<>(SB)
+
+TEXT libc_clonefileat_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_clonefileat(SB)
-TEXT ·libc_dup_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_clonefileat_trampoline_addr(SB), RODATA, $8
+DATA	·libc_clonefileat_trampoline_addr(SB)/8, $libc_clonefileat_trampoline<>(SB)
+
+TEXT libc_dup_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_dup(SB)
-TEXT ·libc_dup2_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_dup_trampoline_addr(SB), RODATA, $8
+DATA	·libc_dup_trampoline_addr(SB)/8, $libc_dup_trampoline<>(SB)
+
+TEXT libc_dup2_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_dup2(SB)
-TEXT ·libc_exchangedata_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_dup2_trampoline_addr(SB), RODATA, $8
+DATA	·libc_dup2_trampoline_addr(SB)/8, $libc_dup2_trampoline<>(SB)
+
+TEXT libc_exchangedata_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_exchangedata(SB)
-TEXT ·libc_exit_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_exchangedata_trampoline_addr(SB), RODATA, $8
+DATA	·libc_exchangedata_trampoline_addr(SB)/8, $libc_exchangedata_trampoline<>(SB)
+
+TEXT libc_exit_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_exit(SB)
-TEXT ·libc_faccessat_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_exit_trampoline_addr(SB), RODATA, $8
+DATA	·libc_exit_trampoline_addr(SB)/8, $libc_exit_trampoline<>(SB)
+
+TEXT libc_faccessat_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_faccessat(SB)
-TEXT ·libc_fchdir_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_faccessat_trampoline_addr(SB), RODATA, $8
+DATA	·libc_faccessat_trampoline_addr(SB)/8, $libc_faccessat_trampoline<>(SB)
+
+TEXT libc_fchdir_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_fchdir(SB)
-TEXT ·libc_fchflags_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_fchdir_trampoline_addr(SB), RODATA, $8
+DATA	·libc_fchdir_trampoline_addr(SB)/8, $libc_fchdir_trampoline<>(SB)
+
+TEXT libc_fchflags_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_fchflags(SB)
-TEXT ·libc_fchmod_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_fchflags_trampoline_addr(SB), RODATA, $8
+DATA	·libc_fchflags_trampoline_addr(SB)/8, $libc_fchflags_trampoline<>(SB)
+
+TEXT libc_fchmod_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_fchmod(SB)
-TEXT ·libc_fchmodat_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_fchmod_trampoline_addr(SB), RODATA, $8
+DATA	·libc_fchmod_trampoline_addr(SB)/8, $libc_fchmod_trampoline<>(SB)
+
+TEXT libc_fchmodat_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_fchmodat(SB)
-TEXT ·libc_fchown_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_fchmodat_trampoline_addr(SB), RODATA, $8
+DATA	·libc_fchmodat_trampoline_addr(SB)/8, $libc_fchmodat_trampoline<>(SB)
+
+TEXT libc_fchown_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_fchown(SB)
-TEXT ·libc_fchownat_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_fchown_trampoline_addr(SB), RODATA, $8
+DATA	·libc_fchown_trampoline_addr(SB)/8, $libc_fchown_trampoline<>(SB)
+
+TEXT libc_fchownat_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_fchownat(SB)
-TEXT ·libc_fclonefileat_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_fchownat_trampoline_addr(SB), RODATA, $8
+DATA	·libc_fchownat_trampoline_addr(SB)/8, $libc_fchownat_trampoline<>(SB)
+
+TEXT libc_fclonefileat_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_fclonefileat(SB)
-TEXT ·libc_flock_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_fclonefileat_trampoline_addr(SB), RODATA, $8
+DATA	·libc_fclonefileat_trampoline_addr(SB)/8, $libc_fclonefileat_trampoline<>(SB)
+
+TEXT libc_flock_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_flock(SB)
-TEXT ·libc_fpathconf_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_flock_trampoline_addr(SB), RODATA, $8
+DATA	·libc_flock_trampoline_addr(SB)/8, $libc_flock_trampoline<>(SB)
+
+TEXT libc_fpathconf_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_fpathconf(SB)
-TEXT ·libc_fsync_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_fpathconf_trampoline_addr(SB), RODATA, $8
+DATA	·libc_fpathconf_trampoline_addr(SB)/8, $libc_fpathconf_trampoline<>(SB)
+
+TEXT libc_fsync_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_fsync(SB)
-TEXT ·libc_ftruncate_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_fsync_trampoline_addr(SB), RODATA, $8
+DATA	·libc_fsync_trampoline_addr(SB)/8, $libc_fsync_trampoline<>(SB)
+
+TEXT libc_ftruncate_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_ftruncate(SB)
-TEXT ·libc_getcwd_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_ftruncate_trampoline_addr(SB), RODATA, $8
+DATA	·libc_ftruncate_trampoline_addr(SB)/8, $libc_ftruncate_trampoline<>(SB)
+
+TEXT libc_getcwd_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_getcwd(SB)
-TEXT ·libc_getdtablesize_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_getcwd_trampoline_addr(SB), RODATA, $8
+DATA	·libc_getcwd_trampoline_addr(SB)/8, $libc_getcwd_trampoline<>(SB)
+
+TEXT libc_getdtablesize_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_getdtablesize(SB)
-TEXT ·libc_getegid_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_getdtablesize_trampoline_addr(SB), RODATA, $8
+DATA	·libc_getdtablesize_trampoline_addr(SB)/8, $libc_getdtablesize_trampoline<>(SB)
+
+TEXT libc_getegid_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_getegid(SB)
-TEXT ·libc_geteuid_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_getegid_trampoline_addr(SB), RODATA, $8
+DATA	·libc_getegid_trampoline_addr(SB)/8, $libc_getegid_trampoline<>(SB)
+
+TEXT libc_geteuid_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_geteuid(SB)
-TEXT ·libc_getgid_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_geteuid_trampoline_addr(SB), RODATA, $8
+DATA	·libc_geteuid_trampoline_addr(SB)/8, $libc_geteuid_trampoline<>(SB)
+
+TEXT libc_getgid_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_getgid(SB)
-TEXT ·libc_getpgid_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_getgid_trampoline_addr(SB), RODATA, $8
+DATA	·libc_getgid_trampoline_addr(SB)/8, $libc_getgid_trampoline<>(SB)
+
+TEXT libc_getpgid_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_getpgid(SB)
-TEXT ·libc_getpgrp_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_getpgid_trampoline_addr(SB), RODATA, $8
+DATA	·libc_getpgid_trampoline_addr(SB)/8, $libc_getpgid_trampoline<>(SB)
+
+TEXT libc_getpgrp_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_getpgrp(SB)
-TEXT ·libc_getpid_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_getpgrp_trampoline_addr(SB), RODATA, $8
+DATA	·libc_getpgrp_trampoline_addr(SB)/8, $libc_getpgrp_trampoline<>(SB)
+
+TEXT libc_getpid_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_getpid(SB)
-TEXT ·libc_getppid_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_getpid_trampoline_addr(SB), RODATA, $8
+DATA	·libc_getpid_trampoline_addr(SB)/8, $libc_getpid_trampoline<>(SB)
+
+TEXT libc_getppid_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_getppid(SB)
-TEXT ·libc_getpriority_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_getppid_trampoline_addr(SB), RODATA, $8
+DATA	·libc_getppid_trampoline_addr(SB)/8, $libc_getppid_trampoline<>(SB)
+
+TEXT libc_getpriority_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_getpriority(SB)
-TEXT ·libc_getrlimit_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_getpriority_trampoline_addr(SB), RODATA, $8
+DATA	·libc_getpriority_trampoline_addr(SB)/8, $libc_getpriority_trampoline<>(SB)
+
+TEXT libc_getrlimit_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_getrlimit(SB)
-TEXT ·libc_getrusage_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_getrlimit_trampoline_addr(SB), RODATA, $8
+DATA	·libc_getrlimit_trampoline_addr(SB)/8, $libc_getrlimit_trampoline<>(SB)
+
+TEXT libc_getrusage_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_getrusage(SB)
-TEXT ·libc_getsid_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_getrusage_trampoline_addr(SB), RODATA, $8
+DATA	·libc_getrusage_trampoline_addr(SB)/8, $libc_getrusage_trampoline<>(SB)
+
+TEXT libc_getsid_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_getsid(SB)
-TEXT ·libc_gettimeofday_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_getsid_trampoline_addr(SB), RODATA, $8
+DATA	·libc_getsid_trampoline_addr(SB)/8, $libc_getsid_trampoline<>(SB)
+
+TEXT libc_gettimeofday_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_gettimeofday(SB)
-TEXT ·libc_getuid_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_gettimeofday_trampoline_addr(SB), RODATA, $8
+DATA	·libc_gettimeofday_trampoline_addr(SB)/8, $libc_gettimeofday_trampoline<>(SB)
+
+TEXT libc_getuid_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_getuid(SB)
-TEXT ·libc_issetugid_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_getuid_trampoline_addr(SB), RODATA, $8
+DATA	·libc_getuid_trampoline_addr(SB)/8, $libc_getuid_trampoline<>(SB)
+
+TEXT libc_issetugid_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_issetugid(SB)
-TEXT ·libc_kqueue_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_issetugid_trampoline_addr(SB), RODATA, $8
+DATA	·libc_issetugid_trampoline_addr(SB)/8, $libc_issetugid_trampoline<>(SB)
+
+TEXT libc_kqueue_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_kqueue(SB)
-TEXT ·libc_lchown_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_kqueue_trampoline_addr(SB), RODATA, $8
+DATA	·libc_kqueue_trampoline_addr(SB)/8, $libc_kqueue_trampoline<>(SB)
+
+TEXT libc_lchown_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_lchown(SB)
-TEXT ·libc_link_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_lchown_trampoline_addr(SB), RODATA, $8
+DATA	·libc_lchown_trampoline_addr(SB)/8, $libc_lchown_trampoline<>(SB)
+
+TEXT libc_link_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_link(SB)
-TEXT ·libc_linkat_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_link_trampoline_addr(SB), RODATA, $8
+DATA	·libc_link_trampoline_addr(SB)/8, $libc_link_trampoline<>(SB)
+
+TEXT libc_linkat_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_linkat(SB)
-TEXT ·libc_listen_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_linkat_trampoline_addr(SB), RODATA, $8
+DATA	·libc_linkat_trampoline_addr(SB)/8, $libc_linkat_trampoline<>(SB)
+
+TEXT libc_listen_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_listen(SB)
-TEXT ·libc_mkdir_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_listen_trampoline_addr(SB), RODATA, $8
+DATA	·libc_listen_trampoline_addr(SB)/8, $libc_listen_trampoline<>(SB)
+
+TEXT libc_mkdir_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_mkdir(SB)
-TEXT ·libc_mkdirat_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_mkdir_trampoline_addr(SB), RODATA, $8
+DATA	·libc_mkdir_trampoline_addr(SB)/8, $libc_mkdir_trampoline<>(SB)
+
+TEXT libc_mkdirat_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_mkdirat(SB)
-TEXT ·libc_mkfifo_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_mkdirat_trampoline_addr(SB), RODATA, $8
+DATA	·libc_mkdirat_trampoline_addr(SB)/8, $libc_mkdirat_trampoline<>(SB)
+
+TEXT libc_mkfifo_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_mkfifo(SB)
-TEXT ·libc_mknod_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_mkfifo_trampoline_addr(SB), RODATA, $8
+DATA	·libc_mkfifo_trampoline_addr(SB)/8, $libc_mkfifo_trampoline<>(SB)
+
+TEXT libc_mknod_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_mknod(SB)
-TEXT ·libc_open_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_mknod_trampoline_addr(SB), RODATA, $8
+DATA	·libc_mknod_trampoline_addr(SB)/8, $libc_mknod_trampoline<>(SB)
+
+TEXT libc_open_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_open(SB)
-TEXT ·libc_openat_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_open_trampoline_addr(SB), RODATA, $8
+DATA	·libc_open_trampoline_addr(SB)/8, $libc_open_trampoline<>(SB)
+
+TEXT libc_openat_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_openat(SB)
-TEXT ·libc_pathconf_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_openat_trampoline_addr(SB), RODATA, $8
+DATA	·libc_openat_trampoline_addr(SB)/8, $libc_openat_trampoline<>(SB)
+
+TEXT libc_pathconf_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_pathconf(SB)
-TEXT ·libc_pread_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_pathconf_trampoline_addr(SB), RODATA, $8
+DATA	·libc_pathconf_trampoline_addr(SB)/8, $libc_pathconf_trampoline<>(SB)
+
+TEXT libc_pread_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_pread(SB)
-TEXT ·libc_pwrite_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_pread_trampoline_addr(SB), RODATA, $8
+DATA	·libc_pread_trampoline_addr(SB)/8, $libc_pread_trampoline<>(SB)
+
+TEXT libc_pwrite_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_pwrite(SB)
-TEXT ·libc_read_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_pwrite_trampoline_addr(SB), RODATA, $8
+DATA	·libc_pwrite_trampoline_addr(SB)/8, $libc_pwrite_trampoline<>(SB)
+
+TEXT libc_read_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_read(SB)
-TEXT ·libc_readlink_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_read_trampoline_addr(SB), RODATA, $8
+DATA	·libc_read_trampoline_addr(SB)/8, $libc_read_trampoline<>(SB)
+
+TEXT libc_readlink_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_readlink(SB)
-TEXT ·libc_readlinkat_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_readlink_trampoline_addr(SB), RODATA, $8
+DATA	·libc_readlink_trampoline_addr(SB)/8, $libc_readlink_trampoline<>(SB)
+
+TEXT libc_readlinkat_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_readlinkat(SB)
-TEXT ·libc_rename_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_readlinkat_trampoline_addr(SB), RODATA, $8
+DATA	·libc_readlinkat_trampoline_addr(SB)/8, $libc_readlinkat_trampoline<>(SB)
+
+TEXT libc_rename_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_rename(SB)
-TEXT ·libc_renameat_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_rename_trampoline_addr(SB), RODATA, $8
+DATA	·libc_rename_trampoline_addr(SB)/8, $libc_rename_trampoline<>(SB)
+
+TEXT libc_renameat_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_renameat(SB)
-TEXT ·libc_revoke_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_renameat_trampoline_addr(SB), RODATA, $8
+DATA	·libc_renameat_trampoline_addr(SB)/8, $libc_renameat_trampoline<>(SB)
+
+TEXT libc_revoke_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_revoke(SB)
-TEXT ·libc_rmdir_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_revoke_trampoline_addr(SB), RODATA, $8
+DATA	·libc_revoke_trampoline_addr(SB)/8, $libc_revoke_trampoline<>(SB)
+
+TEXT libc_rmdir_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_rmdir(SB)
-TEXT ·libc_lseek_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_rmdir_trampoline_addr(SB), RODATA, $8
+DATA	·libc_rmdir_trampoline_addr(SB)/8, $libc_rmdir_trampoline<>(SB)
+
+TEXT libc_lseek_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_lseek(SB)
-TEXT ·libc_select_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_lseek_trampoline_addr(SB), RODATA, $8
+DATA	·libc_lseek_trampoline_addr(SB)/8, $libc_lseek_trampoline<>(SB)
+
+TEXT libc_select_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_select(SB)
-TEXT ·libc_setegid_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_select_trampoline_addr(SB), RODATA, $8
+DATA	·libc_select_trampoline_addr(SB)/8, $libc_select_trampoline<>(SB)
+
+TEXT libc_setegid_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_setegid(SB)
-TEXT ·libc_seteuid_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_setegid_trampoline_addr(SB), RODATA, $8
+DATA	·libc_setegid_trampoline_addr(SB)/8, $libc_setegid_trampoline<>(SB)
+
+TEXT libc_seteuid_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_seteuid(SB)
-TEXT ·libc_setgid_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_seteuid_trampoline_addr(SB), RODATA, $8
+DATA	·libc_seteuid_trampoline_addr(SB)/8, $libc_seteuid_trampoline<>(SB)
+
+TEXT libc_setgid_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_setgid(SB)
-TEXT ·libc_setlogin_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_setgid_trampoline_addr(SB), RODATA, $8
+DATA	·libc_setgid_trampoline_addr(SB)/8, $libc_setgid_trampoline<>(SB)
+
+TEXT libc_setlogin_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_setlogin(SB)
-TEXT ·libc_setpgid_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_setlogin_trampoline_addr(SB), RODATA, $8
+DATA	·libc_setlogin_trampoline_addr(SB)/8, $libc_setlogin_trampoline<>(SB)
+
+TEXT libc_setpgid_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_setpgid(SB)
-TEXT ·libc_setpriority_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_setpgid_trampoline_addr(SB), RODATA, $8
+DATA	·libc_setpgid_trampoline_addr(SB)/8, $libc_setpgid_trampoline<>(SB)
+
+TEXT libc_setpriority_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_setpriority(SB)
-TEXT ·libc_setprivexec_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_setpriority_trampoline_addr(SB), RODATA, $8
+DATA	·libc_setpriority_trampoline_addr(SB)/8, $libc_setpriority_trampoline<>(SB)
+
+TEXT libc_setprivexec_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_setprivexec(SB)
-TEXT ·libc_setregid_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_setprivexec_trampoline_addr(SB), RODATA, $8
+DATA	·libc_setprivexec_trampoline_addr(SB)/8, $libc_setprivexec_trampoline<>(SB)
+
+TEXT libc_setregid_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_setregid(SB)
-TEXT ·libc_setreuid_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_setregid_trampoline_addr(SB), RODATA, $8
+DATA	·libc_setregid_trampoline_addr(SB)/8, $libc_setregid_trampoline<>(SB)
+
+TEXT libc_setreuid_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_setreuid(SB)
-TEXT ·libc_setrlimit_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_setreuid_trampoline_addr(SB), RODATA, $8
+DATA	·libc_setreuid_trampoline_addr(SB)/8, $libc_setreuid_trampoline<>(SB)
+
+TEXT libc_setrlimit_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_setrlimit(SB)
-TEXT ·libc_setsid_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_setrlimit_trampoline_addr(SB), RODATA, $8
+DATA	·libc_setrlimit_trampoline_addr(SB)/8, $libc_setrlimit_trampoline<>(SB)
+
+TEXT libc_setsid_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_setsid(SB)
-TEXT ·libc_settimeofday_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_setsid_trampoline_addr(SB), RODATA, $8
+DATA	·libc_setsid_trampoline_addr(SB)/8, $libc_setsid_trampoline<>(SB)
+
+TEXT libc_settimeofday_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_settimeofday(SB)
-TEXT ·libc_setuid_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_settimeofday_trampoline_addr(SB), RODATA, $8
+DATA	·libc_settimeofday_trampoline_addr(SB)/8, $libc_settimeofday_trampoline<>(SB)
+
+TEXT libc_setuid_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_setuid(SB)
-TEXT ·libc_symlink_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_setuid_trampoline_addr(SB), RODATA, $8
+DATA	·libc_setuid_trampoline_addr(SB)/8, $libc_setuid_trampoline<>(SB)
+
+TEXT libc_symlink_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_symlink(SB)
-TEXT ·libc_symlinkat_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_symlink_trampoline_addr(SB), RODATA, $8
+DATA	·libc_symlink_trampoline_addr(SB)/8, $libc_symlink_trampoline<>(SB)
+
+TEXT libc_symlinkat_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_symlinkat(SB)
-TEXT ·libc_sync_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_symlinkat_trampoline_addr(SB), RODATA, $8
+DATA	·libc_symlinkat_trampoline_addr(SB)/8, $libc_symlinkat_trampoline<>(SB)
+
+TEXT libc_sync_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_sync(SB)
-TEXT ·libc_truncate_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_sync_trampoline_addr(SB), RODATA, $8
+DATA	·libc_sync_trampoline_addr(SB)/8, $libc_sync_trampoline<>(SB)
+
+TEXT libc_truncate_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_truncate(SB)
-TEXT ·libc_umask_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_truncate_trampoline_addr(SB), RODATA, $8
+DATA	·libc_truncate_trampoline_addr(SB)/8, $libc_truncate_trampoline<>(SB)
+
+TEXT libc_umask_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_umask(SB)
-TEXT ·libc_undelete_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_umask_trampoline_addr(SB), RODATA, $8
+DATA	·libc_umask_trampoline_addr(SB)/8, $libc_umask_trampoline<>(SB)
+
+TEXT libc_undelete_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_undelete(SB)
-TEXT ·libc_unlink_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_undelete_trampoline_addr(SB), RODATA, $8
+DATA	·libc_undelete_trampoline_addr(SB)/8, $libc_undelete_trampoline<>(SB)
+
+TEXT libc_unlink_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_unlink(SB)
-TEXT ·libc_unlinkat_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_unlink_trampoline_addr(SB), RODATA, $8
+DATA	·libc_unlink_trampoline_addr(SB)/8, $libc_unlink_trampoline<>(SB)
+
+TEXT libc_unlinkat_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_unlinkat(SB)
-TEXT ·libc_unmount_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_unlinkat_trampoline_addr(SB), RODATA, $8
+DATA	·libc_unlinkat_trampoline_addr(SB)/8, $libc_unlinkat_trampoline<>(SB)
+
+TEXT libc_unmount_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_unmount(SB)
-TEXT ·libc_write_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_unmount_trampoline_addr(SB), RODATA, $8
+DATA	·libc_unmount_trampoline_addr(SB)/8, $libc_unmount_trampoline<>(SB)
+
+TEXT libc_write_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_write(SB)
-TEXT ·libc_mmap_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_write_trampoline_addr(SB), RODATA, $8
+DATA	·libc_write_trampoline_addr(SB)/8, $libc_write_trampoline<>(SB)
+
+TEXT libc_mmap_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_mmap(SB)
-TEXT ·libc_munmap_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_mmap_trampoline_addr(SB), RODATA, $8
+DATA	·libc_mmap_trampoline_addr(SB)/8, $libc_mmap_trampoline<>(SB)
+
+TEXT libc_munmap_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_munmap(SB)
-TEXT ·libc_fstat64_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_munmap_trampoline_addr(SB), RODATA, $8
+DATA	·libc_munmap_trampoline_addr(SB)/8, $libc_munmap_trampoline<>(SB)
+
+TEXT libc_fstat64_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_fstat64(SB)
-TEXT ·libc_fstatat64_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_fstat64_trampoline_addr(SB), RODATA, $8
+DATA	·libc_fstat64_trampoline_addr(SB)/8, $libc_fstat64_trampoline<>(SB)
+
+TEXT libc_fstatat64_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_fstatat64(SB)
-TEXT ·libc_fstatfs64_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_fstatat64_trampoline_addr(SB), RODATA, $8
+DATA	·libc_fstatat64_trampoline_addr(SB)/8, $libc_fstatat64_trampoline<>(SB)
+
+TEXT libc_fstatfs64_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_fstatfs64(SB)
-TEXT ·libc_getfsstat64_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_fstatfs64_trampoline_addr(SB), RODATA, $8
+DATA	·libc_fstatfs64_trampoline_addr(SB)/8, $libc_fstatfs64_trampoline<>(SB)
+
+TEXT libc_getfsstat64_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_getfsstat64(SB)
-TEXT ·libc_lstat64_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_getfsstat64_trampoline_addr(SB), RODATA, $8
+DATA	·libc_getfsstat64_trampoline_addr(SB)/8, $libc_getfsstat64_trampoline<>(SB)
+
+TEXT libc_lstat64_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_lstat64(SB)
-TEXT ·libc_ptrace_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_lstat64_trampoline_addr(SB), RODATA, $8
+DATA	·libc_lstat64_trampoline_addr(SB)/8, $libc_lstat64_trampoline<>(SB)
+
+TEXT libc_ptrace_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_ptrace(SB)
-TEXT ·libc_stat64_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_ptrace_trampoline_addr(SB), RODATA, $8
+DATA	·libc_ptrace_trampoline_addr(SB)/8, $libc_ptrace_trampoline<>(SB)
+
+TEXT libc_stat64_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_stat64(SB)
-TEXT ·libc_statfs64_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_stat64_trampoline_addr(SB), RODATA, $8
+DATA	·libc_stat64_trampoline_addr(SB)/8, $libc_stat64_trampoline<>(SB)
+
+TEXT libc_statfs64_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_statfs64(SB)
+
+GLOBL	·libc_statfs64_trampoline_addr(SB), RODATA, $8
+DATA	·libc_statfs64_trampoline_addr(SB)/8, $libc_statfs64_trampoline<>(SB)
diff --git a/src/cmd/vendor/golang.org/x/sys/unix/zsyscall_darwin_arm.1_13.go b/src/cmd/vendor/golang.org/x/sys/unix/zsyscall_darwin_arm.1_13.go
deleted file mode 100644
index ed437f89a9..0000000000
--- a/src/cmd/vendor/golang.org/x/sys/unix/zsyscall_darwin_arm.1_13.go
+++ /dev/null
@@ -1,40 +0,0 @@
-// go run mksyscall.go -l32 -tags darwin,arm,go1.13 syscall_darwin.1_13.go
-// Code generated by the command above; see README.md. DO NOT EDIT.
-
-//go:build darwin && arm && go1.13
-// +build darwin,arm,go1.13
-
-package unix
-
-import (
-	"syscall"
-	"unsafe"
-)
-
-var _ syscall.Errno
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func closedir(dir uintptr) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_closedir_trampoline), uintptr(dir), 0, 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_closedir_trampoline()
-
-//go:cgo_import_dynamic libc_closedir closedir "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func readdir_r(dir uintptr, entry *Dirent, result **Dirent) (res Errno) {
-	r0, _, _ := syscall_syscall(funcPC(libc_readdir_r_trampoline), uintptr(dir), uintptr(unsafe.Pointer(entry)), uintptr(unsafe.Pointer(result)))
-	res = Errno(r0)
-	return
-}
-
-func libc_readdir_r_trampoline()
-
-//go:cgo_import_dynamic libc_readdir_r readdir_r "/usr/lib/libSystem.B.dylib"
diff --git a/src/cmd/vendor/golang.org/x/sys/unix/zsyscall_darwin_arm.1_13.s b/src/cmd/vendor/golang.org/x/sys/unix/zsyscall_darwin_arm.1_13.s
deleted file mode 100644
index 0cc80ad87e..0000000000
--- a/src/cmd/vendor/golang.org/x/sys/unix/zsyscall_darwin_arm.1_13.s
+++ /dev/null
@@ -1,13 +0,0 @@
-// go run mkasm_darwin.go arm
-// Code generated by the command above; DO NOT EDIT.
-
-//go:build go1.13
-// +build go1.13
-
-#include "textflag.h"
-TEXT ·libc_fdopendir_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_fdopendir(SB)
-TEXT ·libc_closedir_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_closedir(SB)
-TEXT ·libc_readdir_r_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_readdir_r(SB)
diff --git a/src/cmd/vendor/golang.org/x/sys/unix/zsyscall_darwin_arm.go b/src/cmd/vendor/golang.org/x/sys/unix/zsyscall_darwin_arm.go
deleted file mode 100644
index 7f88cb5ea2..0000000000
--- a/src/cmd/vendor/golang.org/x/sys/unix/zsyscall_darwin_arm.go
+++ /dev/null
@@ -1,2417 +0,0 @@
-// go run mksyscall.go -l32 -tags darwin,arm,go1.12 syscall_bsd.go syscall_darwin.go syscall_darwin_arm.go
-// Code generated by the command above; see README.md. DO NOT EDIT.
-
-//go:build darwin && arm && go1.12
-// +build darwin,arm,go1.12
-
-package unix
-
-import (
-	"syscall"
-	"unsafe"
-)
-
-var _ syscall.Errno
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func getgroups(ngid int, gid *_Gid_t) (n int, err error) {
-	r0, _, e1 := syscall_rawSyscall(funcPC(libc_getgroups_trampoline), uintptr(ngid), uintptr(unsafe.Pointer(gid)), 0)
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_getgroups_trampoline()
-
-//go:cgo_import_dynamic libc_getgroups getgroups "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func setgroups(ngid int, gid *_Gid_t) (err error) {
-	_, _, e1 := syscall_rawSyscall(funcPC(libc_setgroups_trampoline), uintptr(ngid), uintptr(unsafe.Pointer(gid)), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_setgroups_trampoline()
-
-//go:cgo_import_dynamic libc_setgroups setgroups "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func wait4(pid int, wstatus *_C_int, options int, rusage *Rusage) (wpid int, err error) {
-	r0, _, e1 := syscall_syscall6(funcPC(libc_wait4_trampoline), uintptr(pid), uintptr(unsafe.Pointer(wstatus)), uintptr(options), uintptr(unsafe.Pointer(rusage)), 0, 0)
-	wpid = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_wait4_trampoline()
-
-//go:cgo_import_dynamic libc_wait4 wait4 "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func accept(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (fd int, err error) {
-	r0, _, e1 := syscall_syscall(funcPC(libc_accept_trampoline), uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)))
-	fd = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_accept_trampoline()
-
-//go:cgo_import_dynamic libc_accept accept "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_bind_trampoline), uintptr(s), uintptr(addr), uintptr(addrlen))
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_bind_trampoline()
-
-//go:cgo_import_dynamic libc_bind bind "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_connect_trampoline), uintptr(s), uintptr(addr), uintptr(addrlen))
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_connect_trampoline()
-
-//go:cgo_import_dynamic libc_connect connect "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func socket(domain int, typ int, proto int) (fd int, err error) {
-	r0, _, e1 := syscall_rawSyscall(funcPC(libc_socket_trampoline), uintptr(domain), uintptr(typ), uintptr(proto))
-	fd = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_socket_trampoline()
-
-//go:cgo_import_dynamic libc_socket socket "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error) {
-	_, _, e1 := syscall_syscall6(funcPC(libc_getsockopt_trampoline), uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(unsafe.Pointer(vallen)), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_getsockopt_trampoline()
-
-//go:cgo_import_dynamic libc_getsockopt getsockopt "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) (err error) {
-	_, _, e1 := syscall_syscall6(funcPC(libc_setsockopt_trampoline), uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(vallen), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_setsockopt_trampoline()
-
-//go:cgo_import_dynamic libc_setsockopt setsockopt "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func getpeername(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) {
-	_, _, e1 := syscall_rawSyscall(funcPC(libc_getpeername_trampoline), uintptr(fd), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)))
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_getpeername_trampoline()
-
-//go:cgo_import_dynamic libc_getpeername getpeername "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func getsockname(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) {
-	_, _, e1 := syscall_rawSyscall(funcPC(libc_getsockname_trampoline), uintptr(fd), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)))
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_getsockname_trampoline()
-
-//go:cgo_import_dynamic libc_getsockname getsockname "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Shutdown(s int, how int) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_shutdown_trampoline), uintptr(s), uintptr(how), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_shutdown_trampoline()
-
-//go:cgo_import_dynamic libc_shutdown shutdown "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func socketpair(domain int, typ int, proto int, fd *[2]int32) (err error) {
-	_, _, e1 := syscall_rawSyscall6(funcPC(libc_socketpair_trampoline), uintptr(domain), uintptr(typ), uintptr(proto), uintptr(unsafe.Pointer(fd)), 0, 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_socketpair_trampoline()
-
-//go:cgo_import_dynamic libc_socketpair socketpair "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func recvfrom(fd int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (n int, err error) {
-	var _p0 unsafe.Pointer
-	if len(p) > 0 {
-		_p0 = unsafe.Pointer(&p[0])
-	} else {
-		_p0 = unsafe.Pointer(&_zero)
-	}
-	r0, _, e1 := syscall_syscall6(funcPC(libc_recvfrom_trampoline), uintptr(fd), uintptr(_p0), uintptr(len(p)), uintptr(flags), uintptr(unsafe.Pointer(from)), uintptr(unsafe.Pointer(fromlen)))
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_recvfrom_trampoline()
-
-//go:cgo_import_dynamic libc_recvfrom recvfrom "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func sendto(s int, buf []byte, flags int, to unsafe.Pointer, addrlen _Socklen) (err error) {
-	var _p0 unsafe.Pointer
-	if len(buf) > 0 {
-		_p0 = unsafe.Pointer(&buf[0])
-	} else {
-		_p0 = unsafe.Pointer(&_zero)
-	}
-	_, _, e1 := syscall_syscall6(funcPC(libc_sendto_trampoline), uintptr(s), uintptr(_p0), uintptr(len(buf)), uintptr(flags), uintptr(to), uintptr(addrlen))
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_sendto_trampoline()
-
-//go:cgo_import_dynamic libc_sendto sendto "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func recvmsg(s int, msg *Msghdr, flags int) (n int, err error) {
-	r0, _, e1 := syscall_syscall(funcPC(libc_recvmsg_trampoline), uintptr(s), uintptr(unsafe.Pointer(msg)), uintptr(flags))
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_recvmsg_trampoline()
-
-//go:cgo_import_dynamic libc_recvmsg recvmsg "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func sendmsg(s int, msg *Msghdr, flags int) (n int, err error) {
-	r0, _, e1 := syscall_syscall(funcPC(libc_sendmsg_trampoline), uintptr(s), uintptr(unsafe.Pointer(msg)), uintptr(flags))
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_sendmsg_trampoline()
-
-//go:cgo_import_dynamic libc_sendmsg sendmsg "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func kevent(kq int, change unsafe.Pointer, nchange int, event unsafe.Pointer, nevent int, timeout *Timespec) (n int, err error) {
-	r0, _, e1 := syscall_syscall6(funcPC(libc_kevent_trampoline), uintptr(kq), uintptr(change), uintptr(nchange), uintptr(event), uintptr(nevent), uintptr(unsafe.Pointer(timeout)))
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_kevent_trampoline()
-
-//go:cgo_import_dynamic libc_kevent kevent "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func utimes(path string, timeval *[2]Timeval) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall(funcPC(libc_utimes_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(timeval)), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_utimes_trampoline()
-
-//go:cgo_import_dynamic libc_utimes utimes "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func futimes(fd int, timeval *[2]Timeval) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_futimes_trampoline), uintptr(fd), uintptr(unsafe.Pointer(timeval)), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_futimes_trampoline()
-
-//go:cgo_import_dynamic libc_futimes futimes "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func poll(fds *PollFd, nfds int, timeout int) (n int, err error) {
-	r0, _, e1 := syscall_syscall(funcPC(libc_poll_trampoline), uintptr(unsafe.Pointer(fds)), uintptr(nfds), uintptr(timeout))
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_poll_trampoline()
-
-//go:cgo_import_dynamic libc_poll poll "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Madvise(b []byte, behav int) (err error) {
-	var _p0 unsafe.Pointer
-	if len(b) > 0 {
-		_p0 = unsafe.Pointer(&b[0])
-	} else {
-		_p0 = unsafe.Pointer(&_zero)
-	}
-	_, _, e1 := syscall_syscall(funcPC(libc_madvise_trampoline), uintptr(_p0), uintptr(len(b)), uintptr(behav))
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_madvise_trampoline()
-
-//go:cgo_import_dynamic libc_madvise madvise "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Mlock(b []byte) (err error) {
-	var _p0 unsafe.Pointer
-	if len(b) > 0 {
-		_p0 = unsafe.Pointer(&b[0])
-	} else {
-		_p0 = unsafe.Pointer(&_zero)
-	}
-	_, _, e1 := syscall_syscall(funcPC(libc_mlock_trampoline), uintptr(_p0), uintptr(len(b)), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_mlock_trampoline()
-
-//go:cgo_import_dynamic libc_mlock mlock "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Mlockall(flags int) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_mlockall_trampoline), uintptr(flags), 0, 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_mlockall_trampoline()
-
-//go:cgo_import_dynamic libc_mlockall mlockall "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Mprotect(b []byte, prot int) (err error) {
-	var _p0 unsafe.Pointer
-	if len(b) > 0 {
-		_p0 = unsafe.Pointer(&b[0])
-	} else {
-		_p0 = unsafe.Pointer(&_zero)
-	}
-	_, _, e1 := syscall_syscall(funcPC(libc_mprotect_trampoline), uintptr(_p0), uintptr(len(b)), uintptr(prot))
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_mprotect_trampoline()
-
-//go:cgo_import_dynamic libc_mprotect mprotect "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Msync(b []byte, flags int) (err error) {
-	var _p0 unsafe.Pointer
-	if len(b) > 0 {
-		_p0 = unsafe.Pointer(&b[0])
-	} else {
-		_p0 = unsafe.Pointer(&_zero)
-	}
-	_, _, e1 := syscall_syscall(funcPC(libc_msync_trampoline), uintptr(_p0), uintptr(len(b)), uintptr(flags))
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_msync_trampoline()
-
-//go:cgo_import_dynamic libc_msync msync "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Munlock(b []byte) (err error) {
-	var _p0 unsafe.Pointer
-	if len(b) > 0 {
-		_p0 = unsafe.Pointer(&b[0])
-	} else {
-		_p0 = unsafe.Pointer(&_zero)
-	}
-	_, _, e1 := syscall_syscall(funcPC(libc_munlock_trampoline), uintptr(_p0), uintptr(len(b)), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_munlock_trampoline()
-
-//go:cgo_import_dynamic libc_munlock munlock "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Munlockall() (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_munlockall_trampoline), 0, 0, 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_munlockall_trampoline()
-
-//go:cgo_import_dynamic libc_munlockall munlockall "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func pipe(p *[2]int32) (err error) {
-	_, _, e1 := syscall_rawSyscall(funcPC(libc_pipe_trampoline), uintptr(unsafe.Pointer(p)), 0, 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_pipe_trampoline()
-
-//go:cgo_import_dynamic libc_pipe pipe "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func getxattr(path string, attr string, dest *byte, size int, position uint32, options int) (sz int, err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path)
-	if err != nil {
-		return
-	}
-	var _p1 *byte
-	_p1, err = BytePtrFromString(attr)
-	if err != nil {
-		return
-	}
-	r0, _, e1 := syscall_syscall6(funcPC(libc_getxattr_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), uintptr(unsafe.Pointer(dest)), uintptr(size), uintptr(position), uintptr(options))
-	sz = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_getxattr_trampoline()
-
-//go:cgo_import_dynamic libc_getxattr getxattr "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func fgetxattr(fd int, attr string, dest *byte, size int, position uint32, options int) (sz int, err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(attr)
-	if err != nil {
-		return
-	}
-	r0, _, e1 := syscall_syscall6(funcPC(libc_fgetxattr_trampoline), uintptr(fd), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(dest)), uintptr(size), uintptr(position), uintptr(options))
-	sz = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_fgetxattr_trampoline()
-
-//go:cgo_import_dynamic libc_fgetxattr fgetxattr "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func setxattr(path string, attr string, data *byte, size int, position uint32, options int) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path)
-	if err != nil {
-		return
-	}
-	var _p1 *byte
-	_p1, err = BytePtrFromString(attr)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall6(funcPC(libc_setxattr_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), uintptr(unsafe.Pointer(data)), uintptr(size), uintptr(position), uintptr(options))
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_setxattr_trampoline()
-
-//go:cgo_import_dynamic libc_setxattr setxattr "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func fsetxattr(fd int, attr string, data *byte, size int, position uint32, options int) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(attr)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall6(funcPC(libc_fsetxattr_trampoline), uintptr(fd), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(data)), uintptr(size), uintptr(position), uintptr(options))
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_fsetxattr_trampoline()
-
-//go:cgo_import_dynamic libc_fsetxattr fsetxattr "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func removexattr(path string, attr string, options int) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path)
-	if err != nil {
-		return
-	}
-	var _p1 *byte
-	_p1, err = BytePtrFromString(attr)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall(funcPC(libc_removexattr_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), uintptr(options))
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_removexattr_trampoline()
-
-//go:cgo_import_dynamic libc_removexattr removexattr "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func fremovexattr(fd int, attr string, options int) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(attr)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall(funcPC(libc_fremovexattr_trampoline), uintptr(fd), uintptr(unsafe.Pointer(_p0)), uintptr(options))
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_fremovexattr_trampoline()
-
-//go:cgo_import_dynamic libc_fremovexattr fremovexattr "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func listxattr(path string, dest *byte, size int, options int) (sz int, err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path)
-	if err != nil {
-		return
-	}
-	r0, _, e1 := syscall_syscall6(funcPC(libc_listxattr_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(dest)), uintptr(size), uintptr(options), 0, 0)
-	sz = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_listxattr_trampoline()
-
-//go:cgo_import_dynamic libc_listxattr listxattr "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func flistxattr(fd int, dest *byte, size int, options int) (sz int, err error) {
-	r0, _, e1 := syscall_syscall6(funcPC(libc_flistxattr_trampoline), uintptr(fd), uintptr(unsafe.Pointer(dest)), uintptr(size), uintptr(options), 0, 0)
-	sz = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_flistxattr_trampoline()
-
-//go:cgo_import_dynamic libc_flistxattr flistxattr "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func setattrlist(path *byte, list unsafe.Pointer, buf unsafe.Pointer, size uintptr, options int) (err error) {
-	_, _, e1 := syscall_syscall6(funcPC(libc_setattrlist_trampoline), uintptr(unsafe.Pointer(path)), uintptr(list), uintptr(buf), uintptr(size), uintptr(options), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_setattrlist_trampoline()
-
-//go:cgo_import_dynamic libc_setattrlist setattrlist "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func fcntl(fd int, cmd int, arg int) (val int, err error) {
-	r0, _, e1 := syscall_syscall(funcPC(libc_fcntl_trampoline), uintptr(fd), uintptr(cmd), uintptr(arg))
-	val = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_fcntl_trampoline()
-
-//go:cgo_import_dynamic libc_fcntl fcntl "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func kill(pid int, signum int, posix int) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_kill_trampoline), uintptr(pid), uintptr(signum), uintptr(posix))
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_kill_trampoline()
-
-//go:cgo_import_dynamic libc_kill kill "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func ioctl(fd int, req uint, arg uintptr) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_ioctl_trampoline), uintptr(fd), uintptr(req), uintptr(arg))
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_ioctl_trampoline()
-
-//go:cgo_import_dynamic libc_ioctl ioctl "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func sysctl(mib []_C_int, old *byte, oldlen *uintptr, new *byte, newlen uintptr) (err error) {
-	var _p0 unsafe.Pointer
-	if len(mib) > 0 {
-		_p0 = unsafe.Pointer(&mib[0])
-	} else {
-		_p0 = unsafe.Pointer(&_zero)
-	}
-	_, _, e1 := syscall_syscall6(funcPC(libc_sysctl_trampoline), uintptr(_p0), uintptr(len(mib)), uintptr(unsafe.Pointer(old)), uintptr(unsafe.Pointer(oldlen)), uintptr(unsafe.Pointer(new)), uintptr(newlen))
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_sysctl_trampoline()
-
-//go:cgo_import_dynamic libc_sysctl sysctl "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func sendfile(infd int, outfd int, offset int64, len *int64, hdtr unsafe.Pointer, flags int) (err error) {
-	_, _, e1 := syscall_syscall9(funcPC(libc_sendfile_trampoline), uintptr(infd), uintptr(outfd), uintptr(offset), uintptr(offset>>32), uintptr(unsafe.Pointer(len)), uintptr(hdtr), uintptr(flags), 0, 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_sendfile_trampoline()
-
-//go:cgo_import_dynamic libc_sendfile sendfile "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Access(path string, mode uint32) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall(funcPC(libc_access_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(mode), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_access_trampoline()
-
-//go:cgo_import_dynamic libc_access access "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Adjtime(delta *Timeval, olddelta *Timeval) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_adjtime_trampoline), uintptr(unsafe.Pointer(delta)), uintptr(unsafe.Pointer(olddelta)), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_adjtime_trampoline()
-
-//go:cgo_import_dynamic libc_adjtime adjtime "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Chdir(path string) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall(funcPC(libc_chdir_trampoline), uintptr(unsafe.Pointer(_p0)), 0, 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_chdir_trampoline()
-
-//go:cgo_import_dynamic libc_chdir chdir "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Chflags(path string, flags int) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall(funcPC(libc_chflags_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(flags), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_chflags_trampoline()
-
-//go:cgo_import_dynamic libc_chflags chflags "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Chmod(path string, mode uint32) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall(funcPC(libc_chmod_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(mode), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_chmod_trampoline()
-
-//go:cgo_import_dynamic libc_chmod chmod "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Chown(path string, uid int, gid int) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall(funcPC(libc_chown_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(uid), uintptr(gid))
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_chown_trampoline()
-
-//go:cgo_import_dynamic libc_chown chown "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Chroot(path string) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall(funcPC(libc_chroot_trampoline), uintptr(unsafe.Pointer(_p0)), 0, 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_chroot_trampoline()
-
-//go:cgo_import_dynamic libc_chroot chroot "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func ClockGettime(clockid int32, time *Timespec) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_clock_gettime_trampoline), uintptr(clockid), uintptr(unsafe.Pointer(time)), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_clock_gettime_trampoline()
-
-//go:cgo_import_dynamic libc_clock_gettime clock_gettime "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Close(fd int) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_close_trampoline), uintptr(fd), 0, 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_close_trampoline()
-
-//go:cgo_import_dynamic libc_close close "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Clonefile(src string, dst string, flags int) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(src)
-	if err != nil {
-		return
-	}
-	var _p1 *byte
-	_p1, err = BytePtrFromString(dst)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall(funcPC(libc_clonefile_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), uintptr(flags))
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_clonefile_trampoline()
-
-//go:cgo_import_dynamic libc_clonefile clonefile "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Clonefileat(srcDirfd int, src string, dstDirfd int, dst string, flags int) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(src)
-	if err != nil {
-		return
-	}
-	var _p1 *byte
-	_p1, err = BytePtrFromString(dst)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall6(funcPC(libc_clonefileat_trampoline), uintptr(srcDirfd), uintptr(unsafe.Pointer(_p0)), uintptr(dstDirfd), uintptr(unsafe.Pointer(_p1)), uintptr(flags), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_clonefileat_trampoline()
-
-//go:cgo_import_dynamic libc_clonefileat clonefileat "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Dup(fd int) (nfd int, err error) {
-	r0, _, e1 := syscall_syscall(funcPC(libc_dup_trampoline), uintptr(fd), 0, 0)
-	nfd = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_dup_trampoline()
-
-//go:cgo_import_dynamic libc_dup dup "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Dup2(from int, to int) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_dup2_trampoline), uintptr(from), uintptr(to), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_dup2_trampoline()
-
-//go:cgo_import_dynamic libc_dup2 dup2 "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Exchangedata(path1 string, path2 string, options int) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path1)
-	if err != nil {
-		return
-	}
-	var _p1 *byte
-	_p1, err = BytePtrFromString(path2)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall(funcPC(libc_exchangedata_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), uintptr(options))
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_exchangedata_trampoline()
-
-//go:cgo_import_dynamic libc_exchangedata exchangedata "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Exit(code int) {
-	syscall_syscall(funcPC(libc_exit_trampoline), uintptr(code), 0, 0)
-	return
-}
-
-func libc_exit_trampoline()
-
-//go:cgo_import_dynamic libc_exit exit "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Faccessat(dirfd int, path string, mode uint32, flags int) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall6(funcPC(libc_faccessat_trampoline), uintptr(dirfd), uintptr(unsafe.Pointer(_p0)), uintptr(mode), uintptr(flags), 0, 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_faccessat_trampoline()
-
-//go:cgo_import_dynamic libc_faccessat faccessat "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Fchdir(fd int) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_fchdir_trampoline), uintptr(fd), 0, 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_fchdir_trampoline()
-
-//go:cgo_import_dynamic libc_fchdir fchdir "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Fchflags(fd int, flags int) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_fchflags_trampoline), uintptr(fd), uintptr(flags), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_fchflags_trampoline()
-
-//go:cgo_import_dynamic libc_fchflags fchflags "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Fchmod(fd int, mode uint32) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_fchmod_trampoline), uintptr(fd), uintptr(mode), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_fchmod_trampoline()
-
-//go:cgo_import_dynamic libc_fchmod fchmod "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Fchmodat(dirfd int, path string, mode uint32, flags int) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall6(funcPC(libc_fchmodat_trampoline), uintptr(dirfd), uintptr(unsafe.Pointer(_p0)), uintptr(mode), uintptr(flags), 0, 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_fchmodat_trampoline()
-
-//go:cgo_import_dynamic libc_fchmodat fchmodat "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Fchown(fd int, uid int, gid int) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_fchown_trampoline), uintptr(fd), uintptr(uid), uintptr(gid))
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_fchown_trampoline()
-
-//go:cgo_import_dynamic libc_fchown fchown "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Fchownat(dirfd int, path string, uid int, gid int, flags int) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall6(funcPC(libc_fchownat_trampoline), uintptr(dirfd), uintptr(unsafe.Pointer(_p0)), uintptr(uid), uintptr(gid), uintptr(flags), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_fchownat_trampoline()
-
-//go:cgo_import_dynamic libc_fchownat fchownat "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Fclonefileat(srcDirfd int, dstDirfd int, dst string, flags int) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(dst)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall6(funcPC(libc_fclonefileat_trampoline), uintptr(srcDirfd), uintptr(dstDirfd), uintptr(unsafe.Pointer(_p0)), uintptr(flags), 0, 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_fclonefileat_trampoline()
-
-//go:cgo_import_dynamic libc_fclonefileat fclonefileat "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Flock(fd int, how int) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_flock_trampoline), uintptr(fd), uintptr(how), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_flock_trampoline()
-
-//go:cgo_import_dynamic libc_flock flock "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Fpathconf(fd int, name int) (val int, err error) {
-	r0, _, e1 := syscall_syscall(funcPC(libc_fpathconf_trampoline), uintptr(fd), uintptr(name), 0)
-	val = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_fpathconf_trampoline()
-
-//go:cgo_import_dynamic libc_fpathconf fpathconf "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Fsync(fd int) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_fsync_trampoline), uintptr(fd), 0, 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_fsync_trampoline()
-
-//go:cgo_import_dynamic libc_fsync fsync "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Ftruncate(fd int, length int64) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_ftruncate_trampoline), uintptr(fd), uintptr(length), uintptr(length>>32))
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_ftruncate_trampoline()
-
-//go:cgo_import_dynamic libc_ftruncate ftruncate "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Getcwd(buf []byte) (n int, err error) {
-	var _p0 unsafe.Pointer
-	if len(buf) > 0 {
-		_p0 = unsafe.Pointer(&buf[0])
-	} else {
-		_p0 = unsafe.Pointer(&_zero)
-	}
-	r0, _, e1 := syscall_syscall(funcPC(libc_getcwd_trampoline), uintptr(_p0), uintptr(len(buf)), 0)
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_getcwd_trampoline()
-
-//go:cgo_import_dynamic libc_getcwd getcwd "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Getdtablesize() (size int) {
-	r0, _, _ := syscall_syscall(funcPC(libc_getdtablesize_trampoline), 0, 0, 0)
-	size = int(r0)
-	return
-}
-
-func libc_getdtablesize_trampoline()
-
-//go:cgo_import_dynamic libc_getdtablesize getdtablesize "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Getegid() (egid int) {
-	r0, _, _ := syscall_rawSyscall(funcPC(libc_getegid_trampoline), 0, 0, 0)
-	egid = int(r0)
-	return
-}
-
-func libc_getegid_trampoline()
-
-//go:cgo_import_dynamic libc_getegid getegid "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Geteuid() (uid int) {
-	r0, _, _ := syscall_rawSyscall(funcPC(libc_geteuid_trampoline), 0, 0, 0)
-	uid = int(r0)
-	return
-}
-
-func libc_geteuid_trampoline()
-
-//go:cgo_import_dynamic libc_geteuid geteuid "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Getgid() (gid int) {
-	r0, _, _ := syscall_rawSyscall(funcPC(libc_getgid_trampoline), 0, 0, 0)
-	gid = int(r0)
-	return
-}
-
-func libc_getgid_trampoline()
-
-//go:cgo_import_dynamic libc_getgid getgid "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Getpgid(pid int) (pgid int, err error) {
-	r0, _, e1 := syscall_rawSyscall(funcPC(libc_getpgid_trampoline), uintptr(pid), 0, 0)
-	pgid = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_getpgid_trampoline()
-
-//go:cgo_import_dynamic libc_getpgid getpgid "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Getpgrp() (pgrp int) {
-	r0, _, _ := syscall_rawSyscall(funcPC(libc_getpgrp_trampoline), 0, 0, 0)
-	pgrp = int(r0)
-	return
-}
-
-func libc_getpgrp_trampoline()
-
-//go:cgo_import_dynamic libc_getpgrp getpgrp "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Getpid() (pid int) {
-	r0, _, _ := syscall_rawSyscall(funcPC(libc_getpid_trampoline), 0, 0, 0)
-	pid = int(r0)
-	return
-}
-
-func libc_getpid_trampoline()
-
-//go:cgo_import_dynamic libc_getpid getpid "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Getppid() (ppid int) {
-	r0, _, _ := syscall_rawSyscall(funcPC(libc_getppid_trampoline), 0, 0, 0)
-	ppid = int(r0)
-	return
-}
-
-func libc_getppid_trampoline()
-
-//go:cgo_import_dynamic libc_getppid getppid "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Getpriority(which int, who int) (prio int, err error) {
-	r0, _, e1 := syscall_syscall(funcPC(libc_getpriority_trampoline), uintptr(which), uintptr(who), 0)
-	prio = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_getpriority_trampoline()
-
-//go:cgo_import_dynamic libc_getpriority getpriority "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Getrlimit(which int, lim *Rlimit) (err error) {
-	_, _, e1 := syscall_rawSyscall(funcPC(libc_getrlimit_trampoline), uintptr(which), uintptr(unsafe.Pointer(lim)), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_getrlimit_trampoline()
-
-//go:cgo_import_dynamic libc_getrlimit getrlimit "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Getrusage(who int, rusage *Rusage) (err error) {
-	_, _, e1 := syscall_rawSyscall(funcPC(libc_getrusage_trampoline), uintptr(who), uintptr(unsafe.Pointer(rusage)), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_getrusage_trampoline()
-
-//go:cgo_import_dynamic libc_getrusage getrusage "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Getsid(pid int) (sid int, err error) {
-	r0, _, e1 := syscall_rawSyscall(funcPC(libc_getsid_trampoline), uintptr(pid), 0, 0)
-	sid = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_getsid_trampoline()
-
-//go:cgo_import_dynamic libc_getsid getsid "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Gettimeofday(tp *Timeval) (err error) {
-	_, _, e1 := syscall_rawSyscall(funcPC(libc_gettimeofday_trampoline), uintptr(unsafe.Pointer(tp)), 0, 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_gettimeofday_trampoline()
-
-//go:cgo_import_dynamic libc_gettimeofday gettimeofday "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Getuid() (uid int) {
-	r0, _, _ := syscall_rawSyscall(funcPC(libc_getuid_trampoline), 0, 0, 0)
-	uid = int(r0)
-	return
-}
-
-func libc_getuid_trampoline()
-
-//go:cgo_import_dynamic libc_getuid getuid "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Issetugid() (tainted bool) {
-	r0, _, _ := syscall_rawSyscall(funcPC(libc_issetugid_trampoline), 0, 0, 0)
-	tainted = bool(r0 != 0)
-	return
-}
-
-func libc_issetugid_trampoline()
-
-//go:cgo_import_dynamic libc_issetugid issetugid "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Kqueue() (fd int, err error) {
-	r0, _, e1 := syscall_syscall(funcPC(libc_kqueue_trampoline), 0, 0, 0)
-	fd = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_kqueue_trampoline()
-
-//go:cgo_import_dynamic libc_kqueue kqueue "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Lchown(path string, uid int, gid int) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall(funcPC(libc_lchown_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(uid), uintptr(gid))
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_lchown_trampoline()
-
-//go:cgo_import_dynamic libc_lchown lchown "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Link(path string, link string) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path)
-	if err != nil {
-		return
-	}
-	var _p1 *byte
-	_p1, err = BytePtrFromString(link)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall(funcPC(libc_link_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_link_trampoline()
-
-//go:cgo_import_dynamic libc_link link "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Linkat(pathfd int, path string, linkfd int, link string, flags int) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path)
-	if err != nil {
-		return
-	}
-	var _p1 *byte
-	_p1, err = BytePtrFromString(link)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall6(funcPC(libc_linkat_trampoline), uintptr(pathfd), uintptr(unsafe.Pointer(_p0)), uintptr(linkfd), uintptr(unsafe.Pointer(_p1)), uintptr(flags), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_linkat_trampoline()
-
-//go:cgo_import_dynamic libc_linkat linkat "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Listen(s int, backlog int) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_listen_trampoline), uintptr(s), uintptr(backlog), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_listen_trampoline()
-
-//go:cgo_import_dynamic libc_listen listen "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Mkdir(path string, mode uint32) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall(funcPC(libc_mkdir_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(mode), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_mkdir_trampoline()
-
-//go:cgo_import_dynamic libc_mkdir mkdir "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Mkdirat(dirfd int, path string, mode uint32) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall(funcPC(libc_mkdirat_trampoline), uintptr(dirfd), uintptr(unsafe.Pointer(_p0)), uintptr(mode))
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_mkdirat_trampoline()
-
-//go:cgo_import_dynamic libc_mkdirat mkdirat "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Mkfifo(path string, mode uint32) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall(funcPC(libc_mkfifo_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(mode), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_mkfifo_trampoline()
-
-//go:cgo_import_dynamic libc_mkfifo mkfifo "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Mknod(path string, mode uint32, dev int) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall(funcPC(libc_mknod_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(mode), uintptr(dev))
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_mknod_trampoline()
-
-//go:cgo_import_dynamic libc_mknod mknod "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Open(path string, mode int, perm uint32) (fd int, err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path)
-	if err != nil {
-		return
-	}
-	r0, _, e1 := syscall_syscall(funcPC(libc_open_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(mode), uintptr(perm))
-	fd = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_open_trampoline()
-
-//go:cgo_import_dynamic libc_open open "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Openat(dirfd int, path string, mode int, perm uint32) (fd int, err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path)
-	if err != nil {
-		return
-	}
-	r0, _, e1 := syscall_syscall6(funcPC(libc_openat_trampoline), uintptr(dirfd), uintptr(unsafe.Pointer(_p0)), uintptr(mode), uintptr(perm), 0, 0)
-	fd = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_openat_trampoline()
-
-//go:cgo_import_dynamic libc_openat openat "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Pathconf(path string, name int) (val int, err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path)
-	if err != nil {
-		return
-	}
-	r0, _, e1 := syscall_syscall(funcPC(libc_pathconf_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(name), 0)
-	val = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_pathconf_trampoline()
-
-//go:cgo_import_dynamic libc_pathconf pathconf "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Pread(fd int, p []byte, offset int64) (n int, err error) {
-	var _p0 unsafe.Pointer
-	if len(p) > 0 {
-		_p0 = unsafe.Pointer(&p[0])
-	} else {
-		_p0 = unsafe.Pointer(&_zero)
-	}
-	r0, _, e1 := syscall_syscall6(funcPC(libc_pread_trampoline), uintptr(fd), uintptr(_p0), uintptr(len(p)), uintptr(offset), uintptr(offset>>32), 0)
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_pread_trampoline()
-
-//go:cgo_import_dynamic libc_pread pread "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Pwrite(fd int, p []byte, offset int64) (n int, err error) {
-	var _p0 unsafe.Pointer
-	if len(p) > 0 {
-		_p0 = unsafe.Pointer(&p[0])
-	} else {
-		_p0 = unsafe.Pointer(&_zero)
-	}
-	r0, _, e1 := syscall_syscall6(funcPC(libc_pwrite_trampoline), uintptr(fd), uintptr(_p0), uintptr(len(p)), uintptr(offset), uintptr(offset>>32), 0)
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_pwrite_trampoline()
-
-//go:cgo_import_dynamic libc_pwrite pwrite "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func read(fd int, p []byte) (n int, err error) {
-	var _p0 unsafe.Pointer
-	if len(p) > 0 {
-		_p0 = unsafe.Pointer(&p[0])
-	} else {
-		_p0 = unsafe.Pointer(&_zero)
-	}
-	r0, _, e1 := syscall_syscall(funcPC(libc_read_trampoline), uintptr(fd), uintptr(_p0), uintptr(len(p)))
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_read_trampoline()
-
-//go:cgo_import_dynamic libc_read read "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Readlink(path string, buf []byte) (n int, err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path)
-	if err != nil {
-		return
-	}
-	var _p1 unsafe.Pointer
-	if len(buf) > 0 {
-		_p1 = unsafe.Pointer(&buf[0])
-	} else {
-		_p1 = unsafe.Pointer(&_zero)
-	}
-	r0, _, e1 := syscall_syscall(funcPC(libc_readlink_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(_p1), uintptr(len(buf)))
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_readlink_trampoline()
-
-//go:cgo_import_dynamic libc_readlink readlink "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Readlinkat(dirfd int, path string, buf []byte) (n int, err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path)
-	if err != nil {
-		return
-	}
-	var _p1 unsafe.Pointer
-	if len(buf) > 0 {
-		_p1 = unsafe.Pointer(&buf[0])
-	} else {
-		_p1 = unsafe.Pointer(&_zero)
-	}
-	r0, _, e1 := syscall_syscall6(funcPC(libc_readlinkat_trampoline), uintptr(dirfd), uintptr(unsafe.Pointer(_p0)), uintptr(_p1), uintptr(len(buf)), 0, 0)
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_readlinkat_trampoline()
-
-//go:cgo_import_dynamic libc_readlinkat readlinkat "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Rename(from string, to string) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(from)
-	if err != nil {
-		return
-	}
-	var _p1 *byte
-	_p1, err = BytePtrFromString(to)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall(funcPC(libc_rename_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_rename_trampoline()
-
-//go:cgo_import_dynamic libc_rename rename "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Renameat(fromfd int, from string, tofd int, to string) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(from)
-	if err != nil {
-		return
-	}
-	var _p1 *byte
-	_p1, err = BytePtrFromString(to)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall6(funcPC(libc_renameat_trampoline), uintptr(fromfd), uintptr(unsafe.Pointer(_p0)), uintptr(tofd), uintptr(unsafe.Pointer(_p1)), 0, 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_renameat_trampoline()
-
-//go:cgo_import_dynamic libc_renameat renameat "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Revoke(path string) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall(funcPC(libc_revoke_trampoline), uintptr(unsafe.Pointer(_p0)), 0, 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_revoke_trampoline()
-
-//go:cgo_import_dynamic libc_revoke revoke "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Rmdir(path string) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall(funcPC(libc_rmdir_trampoline), uintptr(unsafe.Pointer(_p0)), 0, 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_rmdir_trampoline()
-
-//go:cgo_import_dynamic libc_rmdir rmdir "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Seek(fd int, offset int64, whence int) (newoffset int64, err error) {
-	r0, r1, e1 := syscall_syscall6(funcPC(libc_lseek_trampoline), uintptr(fd), uintptr(offset), uintptr(offset>>32), uintptr(whence), 0, 0)
-	newoffset = int64(int64(r1)<<32 | int64(r0))
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_lseek_trampoline()
-
-//go:cgo_import_dynamic libc_lseek lseek "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error) {
-	r0, _, e1 := syscall_syscall6(funcPC(libc_select_trampoline), uintptr(nfd), uintptr(unsafe.Pointer(r)), uintptr(unsafe.Pointer(w)), uintptr(unsafe.Pointer(e)), uintptr(unsafe.Pointer(timeout)), 0)
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_select_trampoline()
-
-//go:cgo_import_dynamic libc_select select "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Setegid(egid int) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_setegid_trampoline), uintptr(egid), 0, 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_setegid_trampoline()
-
-//go:cgo_import_dynamic libc_setegid setegid "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Seteuid(euid int) (err error) {
-	_, _, e1 := syscall_rawSyscall(funcPC(libc_seteuid_trampoline), uintptr(euid), 0, 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_seteuid_trampoline()
-
-//go:cgo_import_dynamic libc_seteuid seteuid "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Setgid(gid int) (err error) {
-	_, _, e1 := syscall_rawSyscall(funcPC(libc_setgid_trampoline), uintptr(gid), 0, 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_setgid_trampoline()
-
-//go:cgo_import_dynamic libc_setgid setgid "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Setlogin(name string) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(name)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall(funcPC(libc_setlogin_trampoline), uintptr(unsafe.Pointer(_p0)), 0, 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_setlogin_trampoline()
-
-//go:cgo_import_dynamic libc_setlogin setlogin "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Setpgid(pid int, pgid int) (err error) {
-	_, _, e1 := syscall_rawSyscall(funcPC(libc_setpgid_trampoline), uintptr(pid), uintptr(pgid), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_setpgid_trampoline()
-
-//go:cgo_import_dynamic libc_setpgid setpgid "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Setpriority(which int, who int, prio int) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_setpriority_trampoline), uintptr(which), uintptr(who), uintptr(prio))
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_setpriority_trampoline()
-
-//go:cgo_import_dynamic libc_setpriority setpriority "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Setprivexec(flag int) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_setprivexec_trampoline), uintptr(flag), 0, 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_setprivexec_trampoline()
-
-//go:cgo_import_dynamic libc_setprivexec setprivexec "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Setregid(rgid int, egid int) (err error) {
-	_, _, e1 := syscall_rawSyscall(funcPC(libc_setregid_trampoline), uintptr(rgid), uintptr(egid), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_setregid_trampoline()
-
-//go:cgo_import_dynamic libc_setregid setregid "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Setreuid(ruid int, euid int) (err error) {
-	_, _, e1 := syscall_rawSyscall(funcPC(libc_setreuid_trampoline), uintptr(ruid), uintptr(euid), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_setreuid_trampoline()
-
-//go:cgo_import_dynamic libc_setreuid setreuid "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Setrlimit(which int, lim *Rlimit) (err error) {
-	_, _, e1 := syscall_rawSyscall(funcPC(libc_setrlimit_trampoline), uintptr(which), uintptr(unsafe.Pointer(lim)), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_setrlimit_trampoline()
-
-//go:cgo_import_dynamic libc_setrlimit setrlimit "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Setsid() (pid int, err error) {
-	r0, _, e1 := syscall_rawSyscall(funcPC(libc_setsid_trampoline), 0, 0, 0)
-	pid = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_setsid_trampoline()
-
-//go:cgo_import_dynamic libc_setsid setsid "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Settimeofday(tp *Timeval) (err error) {
-	_, _, e1 := syscall_rawSyscall(funcPC(libc_settimeofday_trampoline), uintptr(unsafe.Pointer(tp)), 0, 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_settimeofday_trampoline()
-
-//go:cgo_import_dynamic libc_settimeofday settimeofday "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Setuid(uid int) (err error) {
-	_, _, e1 := syscall_rawSyscall(funcPC(libc_setuid_trampoline), uintptr(uid), 0, 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_setuid_trampoline()
-
-//go:cgo_import_dynamic libc_setuid setuid "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Symlink(path string, link string) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path)
-	if err != nil {
-		return
-	}
-	var _p1 *byte
-	_p1, err = BytePtrFromString(link)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall(funcPC(libc_symlink_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_symlink_trampoline()
-
-//go:cgo_import_dynamic libc_symlink symlink "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Symlinkat(oldpath string, newdirfd int, newpath string) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(oldpath)
-	if err != nil {
-		return
-	}
-	var _p1 *byte
-	_p1, err = BytePtrFromString(newpath)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall(funcPC(libc_symlinkat_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(newdirfd), uintptr(unsafe.Pointer(_p1)))
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_symlinkat_trampoline()
-
-//go:cgo_import_dynamic libc_symlinkat symlinkat "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Sync() (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_sync_trampoline), 0, 0, 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_sync_trampoline()
-
-//go:cgo_import_dynamic libc_sync sync "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Truncate(path string, length int64) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall(funcPC(libc_truncate_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(length), uintptr(length>>32))
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_truncate_trampoline()
-
-//go:cgo_import_dynamic libc_truncate truncate "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Umask(newmask int) (oldmask int) {
-	r0, _, _ := syscall_syscall(funcPC(libc_umask_trampoline), uintptr(newmask), 0, 0)
-	oldmask = int(r0)
-	return
-}
-
-func libc_umask_trampoline()
-
-//go:cgo_import_dynamic libc_umask umask "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Undelete(path string) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall(funcPC(libc_undelete_trampoline), uintptr(unsafe.Pointer(_p0)), 0, 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_undelete_trampoline()
-
-//go:cgo_import_dynamic libc_undelete undelete "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Unlink(path string) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall(funcPC(libc_unlink_trampoline), uintptr(unsafe.Pointer(_p0)), 0, 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_unlink_trampoline()
-
-//go:cgo_import_dynamic libc_unlink unlink "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Unlinkat(dirfd int, path string, flags int) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall(funcPC(libc_unlinkat_trampoline), uintptr(dirfd), uintptr(unsafe.Pointer(_p0)), uintptr(flags))
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_unlinkat_trampoline()
-
-//go:cgo_import_dynamic libc_unlinkat unlinkat "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Unmount(path string, flags int) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall(funcPC(libc_unmount_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(flags), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_unmount_trampoline()
-
-//go:cgo_import_dynamic libc_unmount unmount "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func write(fd int, p []byte) (n int, err error) {
-	var _p0 unsafe.Pointer
-	if len(p) > 0 {
-		_p0 = unsafe.Pointer(&p[0])
-	} else {
-		_p0 = unsafe.Pointer(&_zero)
-	}
-	r0, _, e1 := syscall_syscall(funcPC(libc_write_trampoline), uintptr(fd), uintptr(_p0), uintptr(len(p)))
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_write_trampoline()
-
-//go:cgo_import_dynamic libc_write write "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func mmap(addr uintptr, length uintptr, prot int, flag int, fd int, pos int64) (ret uintptr, err error) {
-	r0, _, e1 := syscall_syscall9(funcPC(libc_mmap_trampoline), uintptr(addr), uintptr(length), uintptr(prot), uintptr(flag), uintptr(fd), uintptr(pos), uintptr(pos>>32), 0, 0)
-	ret = uintptr(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_mmap_trampoline()
-
-//go:cgo_import_dynamic libc_mmap mmap "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func munmap(addr uintptr, length uintptr) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_munmap_trampoline), uintptr(addr), uintptr(length), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_munmap_trampoline()
-
-//go:cgo_import_dynamic libc_munmap munmap "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func readlen(fd int, buf *byte, nbuf int) (n int, err error) {
-	r0, _, e1 := syscall_syscall(funcPC(libc_read_trampoline), uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf))
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func writelen(fd int, buf *byte, nbuf int) (n int, err error) {
-	r0, _, e1 := syscall_syscall(funcPC(libc_write_trampoline), uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf))
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Fstat(fd int, stat *Stat_t) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_fstat_trampoline), uintptr(fd), uintptr(unsafe.Pointer(stat)), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_fstat_trampoline()
-
-//go:cgo_import_dynamic libc_fstat fstat "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Fstatat(fd int, path string, stat *Stat_t, flags int) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall6(funcPC(libc_fstatat_trampoline), uintptr(fd), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(stat)), uintptr(flags), 0, 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_fstatat_trampoline()
-
-//go:cgo_import_dynamic libc_fstatat fstatat "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Fstatfs(fd int, stat *Statfs_t) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_fstatfs_trampoline), uintptr(fd), uintptr(unsafe.Pointer(stat)), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_fstatfs_trampoline()
-
-//go:cgo_import_dynamic libc_fstatfs fstatfs "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func getfsstat(buf unsafe.Pointer, size uintptr, flags int) (n int, err error) {
-	r0, _, e1 := syscall_syscall(funcPC(libc_getfsstat_trampoline), uintptr(buf), uintptr(size), uintptr(flags))
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_getfsstat_trampoline()
-
-//go:cgo_import_dynamic libc_getfsstat getfsstat "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Lstat(path string, stat *Stat_t) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall(funcPC(libc_lstat_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(stat)), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_lstat_trampoline()
-
-//go:cgo_import_dynamic libc_lstat lstat "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Stat(path string, stat *Stat_t) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall(funcPC(libc_stat_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(stat)), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_stat_trampoline()
-
-//go:cgo_import_dynamic libc_stat stat "/usr/lib/libSystem.B.dylib"
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Statfs(path string, stat *Statfs_t) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path)
-	if err != nil {
-		return
-	}
-	_, _, e1 := syscall_syscall(funcPC(libc_statfs_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(stat)), 0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-func libc_statfs_trampoline()
-
-//go:cgo_import_dynamic libc_statfs statfs "/usr/lib/libSystem.B.dylib"
diff --git a/src/cmd/vendor/golang.org/x/sys/unix/zsyscall_darwin_arm64.1_13.go b/src/cmd/vendor/golang.org/x/sys/unix/zsyscall_darwin_arm64.1_13.go
index d30ec4e29a..cec595d553 100644
--- a/src/cmd/vendor/golang.org/x/sys/unix/zsyscall_darwin_arm64.1_13.go
+++ b/src/cmd/vendor/golang.org/x/sys/unix/zsyscall_darwin_arm64.1_13.go
@@ -16,25 +16,25 @@ var _ syscall.Errno
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func closedir(dir uintptr) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_closedir_trampoline), uintptr(dir), 0, 0)
+	_, _, e1 := syscall_syscall(libc_closedir_trampoline_addr, uintptr(dir), 0, 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_closedir_trampoline()
+var libc_closedir_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_closedir closedir "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func readdir_r(dir uintptr, entry *Dirent, result **Dirent) (res Errno) {
-	r0, _, _ := syscall_syscall(funcPC(libc_readdir_r_trampoline), uintptr(dir), uintptr(unsafe.Pointer(entry)), uintptr(unsafe.Pointer(result)))
+	r0, _, _ := syscall_syscall(libc_readdir_r_trampoline_addr, uintptr(dir), uintptr(unsafe.Pointer(entry)), uintptr(unsafe.Pointer(result)))
 	res = Errno(r0)
 	return
 }
 
-func libc_readdir_r_trampoline()
+var libc_readdir_r_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_readdir_r readdir_r "/usr/lib/libSystem.B.dylib"
diff --git a/src/cmd/vendor/golang.org/x/sys/unix/zsyscall_darwin_arm64.1_13.s b/src/cmd/vendor/golang.org/x/sys/unix/zsyscall_darwin_arm64.1_13.s
index a5f96ffb07..357989722c 100644
--- a/src/cmd/vendor/golang.org/x/sys/unix/zsyscall_darwin_arm64.1_13.s
+++ b/src/cmd/vendor/golang.org/x/sys/unix/zsyscall_darwin_arm64.1_13.s
@@ -5,9 +5,21 @@
 // +build go1.13
 
 #include "textflag.h"
-TEXT ·libc_fdopendir_trampoline(SB),NOSPLIT,$0-0
+
+TEXT libc_fdopendir_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_fdopendir(SB)
-TEXT ·libc_closedir_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_fdopendir_trampoline_addr(SB), RODATA, $8
+DATA	·libc_fdopendir_trampoline_addr(SB)/8, $libc_fdopendir_trampoline<>(SB)
+
+TEXT libc_closedir_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_closedir(SB)
-TEXT ·libc_readdir_r_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_closedir_trampoline_addr(SB), RODATA, $8
+DATA	·libc_closedir_trampoline_addr(SB)/8, $libc_closedir_trampoline<>(SB)
+
+TEXT libc_readdir_r_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_readdir_r(SB)
+
+GLOBL	·libc_readdir_r_trampoline_addr(SB), RODATA, $8
+DATA	·libc_readdir_r_trampoline_addr(SB)/8, $libc_readdir_r_trampoline<>(SB)
diff --git a/src/cmd/vendor/golang.org/x/sys/unix/zsyscall_darwin_arm64.go b/src/cmd/vendor/golang.org/x/sys/unix/zsyscall_darwin_arm64.go
index a10df58d00..f2ee2bd33b 100644
--- a/src/cmd/vendor/golang.org/x/sys/unix/zsyscall_darwin_arm64.go
+++ b/src/cmd/vendor/golang.org/x/sys/unix/zsyscall_darwin_arm64.go
@@ -16,7 +16,7 @@ var _ syscall.Errno
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func getgroups(ngid int, gid *_Gid_t) (n int, err error) {
-	r0, _, e1 := syscall_rawSyscall(funcPC(libc_getgroups_trampoline), uintptr(ngid), uintptr(unsafe.Pointer(gid)), 0)
+	r0, _, e1 := syscall_rawSyscall(libc_getgroups_trampoline_addr, uintptr(ngid), uintptr(unsafe.Pointer(gid)), 0)
 	n = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -24,28 +24,28 @@ func getgroups(ngid int, gid *_Gid_t) (n int, err error) {
 	return
 }
 
-func libc_getgroups_trampoline()
+var libc_getgroups_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_getgroups getgroups "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func setgroups(ngid int, gid *_Gid_t) (err error) {
-	_, _, e1 := syscall_rawSyscall(funcPC(libc_setgroups_trampoline), uintptr(ngid), uintptr(unsafe.Pointer(gid)), 0)
+	_, _, e1 := syscall_rawSyscall(libc_setgroups_trampoline_addr, uintptr(ngid), uintptr(unsafe.Pointer(gid)), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_setgroups_trampoline()
+var libc_setgroups_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_setgroups setgroups "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func wait4(pid int, wstatus *_C_int, options int, rusage *Rusage) (wpid int, err error) {
-	r0, _, e1 := syscall_syscall6(funcPC(libc_wait4_trampoline), uintptr(pid), uintptr(unsafe.Pointer(wstatus)), uintptr(options), uintptr(unsafe.Pointer(rusage)), 0, 0)
+	r0, _, e1 := syscall_syscall6(libc_wait4_trampoline_addr, uintptr(pid), uintptr(unsafe.Pointer(wstatus)), uintptr(options), uintptr(unsafe.Pointer(rusage)), 0, 0)
 	wpid = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -53,14 +53,14 @@ func wait4(pid int, wstatus *_C_int, options int, rusage *Rusage) (wpid int, err
 	return
 }
 
-func libc_wait4_trampoline()
+var libc_wait4_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_wait4 wait4 "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func accept(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (fd int, err error) {
-	r0, _, e1 := syscall_syscall(funcPC(libc_accept_trampoline), uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)))
+	r0, _, e1 := syscall_syscall(libc_accept_trampoline_addr, uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)))
 	fd = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -68,42 +68,42 @@ func accept(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (fd int, err error) {
 	return
 }
 
-func libc_accept_trampoline()
+var libc_accept_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_accept accept "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_bind_trampoline), uintptr(s), uintptr(addr), uintptr(addrlen))
+	_, _, e1 := syscall_syscall(libc_bind_trampoline_addr, uintptr(s), uintptr(addr), uintptr(addrlen))
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_bind_trampoline()
+var libc_bind_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_bind bind "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_connect_trampoline), uintptr(s), uintptr(addr), uintptr(addrlen))
+	_, _, e1 := syscall_syscall(libc_connect_trampoline_addr, uintptr(s), uintptr(addr), uintptr(addrlen))
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_connect_trampoline()
+var libc_connect_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_connect connect "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func socket(domain int, typ int, proto int) (fd int, err error) {
-	r0, _, e1 := syscall_rawSyscall(funcPC(libc_socket_trampoline), uintptr(domain), uintptr(typ), uintptr(proto))
+	r0, _, e1 := syscall_rawSyscall(libc_socket_trampoline_addr, uintptr(domain), uintptr(typ), uintptr(proto))
 	fd = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -111,91 +111,91 @@ func socket(domain int, typ int, proto int) (fd int, err error) {
 	return
 }
 
-func libc_socket_trampoline()
+var libc_socket_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_socket socket "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error) {
-	_, _, e1 := syscall_syscall6(funcPC(libc_getsockopt_trampoline), uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(unsafe.Pointer(vallen)), 0)
+	_, _, e1 := syscall_syscall6(libc_getsockopt_trampoline_addr, uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(unsafe.Pointer(vallen)), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_getsockopt_trampoline()
+var libc_getsockopt_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_getsockopt getsockopt "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) (err error) {
-	_, _, e1 := syscall_syscall6(funcPC(libc_setsockopt_trampoline), uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(vallen), 0)
+	_, _, e1 := syscall_syscall6(libc_setsockopt_trampoline_addr, uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(vallen), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_setsockopt_trampoline()
+var libc_setsockopt_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_setsockopt setsockopt "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func getpeername(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) {
-	_, _, e1 := syscall_rawSyscall(funcPC(libc_getpeername_trampoline), uintptr(fd), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)))
+	_, _, e1 := syscall_rawSyscall(libc_getpeername_trampoline_addr, uintptr(fd), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)))
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_getpeername_trampoline()
+var libc_getpeername_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_getpeername getpeername "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func getsockname(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) {
-	_, _, e1 := syscall_rawSyscall(funcPC(libc_getsockname_trampoline), uintptr(fd), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)))
+	_, _, e1 := syscall_rawSyscall(libc_getsockname_trampoline_addr, uintptr(fd), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)))
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_getsockname_trampoline()
+var libc_getsockname_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_getsockname getsockname "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Shutdown(s int, how int) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_shutdown_trampoline), uintptr(s), uintptr(how), 0)
+	_, _, e1 := syscall_syscall(libc_shutdown_trampoline_addr, uintptr(s), uintptr(how), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_shutdown_trampoline()
+var libc_shutdown_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_shutdown shutdown "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func socketpair(domain int, typ int, proto int, fd *[2]int32) (err error) {
-	_, _, e1 := syscall_rawSyscall6(funcPC(libc_socketpair_trampoline), uintptr(domain), uintptr(typ), uintptr(proto), uintptr(unsafe.Pointer(fd)), 0, 0)
+	_, _, e1 := syscall_rawSyscall6(libc_socketpair_trampoline_addr, uintptr(domain), uintptr(typ), uintptr(proto), uintptr(unsafe.Pointer(fd)), 0, 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_socketpair_trampoline()
+var libc_socketpair_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_socketpair socketpair "/usr/lib/libSystem.B.dylib"
 
@@ -208,7 +208,7 @@ func recvfrom(fd int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Sockl
 	} else {
 		_p0 = unsafe.Pointer(&_zero)
 	}
-	r0, _, e1 := syscall_syscall6(funcPC(libc_recvfrom_trampoline), uintptr(fd), uintptr(_p0), uintptr(len(p)), uintptr(flags), uintptr(unsafe.Pointer(from)), uintptr(unsafe.Pointer(fromlen)))
+	r0, _, e1 := syscall_syscall6(libc_recvfrom_trampoline_addr, uintptr(fd), uintptr(_p0), uintptr(len(p)), uintptr(flags), uintptr(unsafe.Pointer(from)), uintptr(unsafe.Pointer(fromlen)))
 	n = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -216,7 +216,7 @@ func recvfrom(fd int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Sockl
 	return
 }
 
-func libc_recvfrom_trampoline()
+var libc_recvfrom_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_recvfrom recvfrom "/usr/lib/libSystem.B.dylib"
 
@@ -229,21 +229,21 @@ func sendto(s int, buf []byte, flags int, to unsafe.Pointer, addrlen _Socklen) (
 	} else {
 		_p0 = unsafe.Pointer(&_zero)
 	}
-	_, _, e1 := syscall_syscall6(funcPC(libc_sendto_trampoline), uintptr(s), uintptr(_p0), uintptr(len(buf)), uintptr(flags), uintptr(to), uintptr(addrlen))
+	_, _, e1 := syscall_syscall6(libc_sendto_trampoline_addr, uintptr(s), uintptr(_p0), uintptr(len(buf)), uintptr(flags), uintptr(to), uintptr(addrlen))
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_sendto_trampoline()
+var libc_sendto_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_sendto sendto "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func recvmsg(s int, msg *Msghdr, flags int) (n int, err error) {
-	r0, _, e1 := syscall_syscall(funcPC(libc_recvmsg_trampoline), uintptr(s), uintptr(unsafe.Pointer(msg)), uintptr(flags))
+	r0, _, e1 := syscall_syscall(libc_recvmsg_trampoline_addr, uintptr(s), uintptr(unsafe.Pointer(msg)), uintptr(flags))
 	n = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -251,14 +251,14 @@ func recvmsg(s int, msg *Msghdr, flags int) (n int, err error) {
 	return
 }
 
-func libc_recvmsg_trampoline()
+var libc_recvmsg_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_recvmsg recvmsg "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func sendmsg(s int, msg *Msghdr, flags int) (n int, err error) {
-	r0, _, e1 := syscall_syscall(funcPC(libc_sendmsg_trampoline), uintptr(s), uintptr(unsafe.Pointer(msg)), uintptr(flags))
+	r0, _, e1 := syscall_syscall(libc_sendmsg_trampoline_addr, uintptr(s), uintptr(unsafe.Pointer(msg)), uintptr(flags))
 	n = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -266,14 +266,14 @@ func sendmsg(s int, msg *Msghdr, flags int) (n int, err error) {
 	return
 }
 
-func libc_sendmsg_trampoline()
+var libc_sendmsg_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_sendmsg sendmsg "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func kevent(kq int, change unsafe.Pointer, nchange int, event unsafe.Pointer, nevent int, timeout *Timespec) (n int, err error) {
-	r0, _, e1 := syscall_syscall6(funcPC(libc_kevent_trampoline), uintptr(kq), uintptr(change), uintptr(nchange), uintptr(event), uintptr(nevent), uintptr(unsafe.Pointer(timeout)))
+	r0, _, e1 := syscall_syscall6(libc_kevent_trampoline_addr, uintptr(kq), uintptr(change), uintptr(nchange), uintptr(event), uintptr(nevent), uintptr(unsafe.Pointer(timeout)))
 	n = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -281,7 +281,7 @@ func kevent(kq int, change unsafe.Pointer, nchange int, event unsafe.Pointer, ne
 	return
 }
 
-func libc_kevent_trampoline()
+var libc_kevent_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_kevent kevent "/usr/lib/libSystem.B.dylib"
 
@@ -293,35 +293,35 @@ func utimes(path string, timeval *[2]Timeval) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall(funcPC(libc_utimes_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(timeval)), 0)
+	_, _, e1 := syscall_syscall(libc_utimes_trampoline_addr, uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(timeval)), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_utimes_trampoline()
+var libc_utimes_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_utimes utimes "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func futimes(fd int, timeval *[2]Timeval) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_futimes_trampoline), uintptr(fd), uintptr(unsafe.Pointer(timeval)), 0)
+	_, _, e1 := syscall_syscall(libc_futimes_trampoline_addr, uintptr(fd), uintptr(unsafe.Pointer(timeval)), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_futimes_trampoline()
+var libc_futimes_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_futimes futimes "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func poll(fds *PollFd, nfds int, timeout int) (n int, err error) {
-	r0, _, e1 := syscall_syscall(funcPC(libc_poll_trampoline), uintptr(unsafe.Pointer(fds)), uintptr(nfds), uintptr(timeout))
+	r0, _, e1 := syscall_syscall(libc_poll_trampoline_addr, uintptr(unsafe.Pointer(fds)), uintptr(nfds), uintptr(timeout))
 	n = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -329,7 +329,7 @@ func poll(fds *PollFd, nfds int, timeout int) (n int, err error) {
 	return
 }
 
-func libc_poll_trampoline()
+var libc_poll_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_poll poll "/usr/lib/libSystem.B.dylib"
 
@@ -342,14 +342,14 @@ func Madvise(b []byte, behav int) (err error) {
 	} else {
 		_p0 = unsafe.Pointer(&_zero)
 	}
-	_, _, e1 := syscall_syscall(funcPC(libc_madvise_trampoline), uintptr(_p0), uintptr(len(b)), uintptr(behav))
+	_, _, e1 := syscall_syscall(libc_madvise_trampoline_addr, uintptr(_p0), uintptr(len(b)), uintptr(behav))
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_madvise_trampoline()
+var libc_madvise_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_madvise madvise "/usr/lib/libSystem.B.dylib"
 
@@ -362,28 +362,28 @@ func Mlock(b []byte) (err error) {
 	} else {
 		_p0 = unsafe.Pointer(&_zero)
 	}
-	_, _, e1 := syscall_syscall(funcPC(libc_mlock_trampoline), uintptr(_p0), uintptr(len(b)), 0)
+	_, _, e1 := syscall_syscall(libc_mlock_trampoline_addr, uintptr(_p0), uintptr(len(b)), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_mlock_trampoline()
+var libc_mlock_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_mlock mlock "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Mlockall(flags int) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_mlockall_trampoline), uintptr(flags), 0, 0)
+	_, _, e1 := syscall_syscall(libc_mlockall_trampoline_addr, uintptr(flags), 0, 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_mlockall_trampoline()
+var libc_mlockall_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_mlockall mlockall "/usr/lib/libSystem.B.dylib"
 
@@ -396,14 +396,14 @@ func Mprotect(b []byte, prot int) (err error) {
 	} else {
 		_p0 = unsafe.Pointer(&_zero)
 	}
-	_, _, e1 := syscall_syscall(funcPC(libc_mprotect_trampoline), uintptr(_p0), uintptr(len(b)), uintptr(prot))
+	_, _, e1 := syscall_syscall(libc_mprotect_trampoline_addr, uintptr(_p0), uintptr(len(b)), uintptr(prot))
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_mprotect_trampoline()
+var libc_mprotect_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_mprotect mprotect "/usr/lib/libSystem.B.dylib"
 
@@ -416,14 +416,14 @@ func Msync(b []byte, flags int) (err error) {
 	} else {
 		_p0 = unsafe.Pointer(&_zero)
 	}
-	_, _, e1 := syscall_syscall(funcPC(libc_msync_trampoline), uintptr(_p0), uintptr(len(b)), uintptr(flags))
+	_, _, e1 := syscall_syscall(libc_msync_trampoline_addr, uintptr(_p0), uintptr(len(b)), uintptr(flags))
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_msync_trampoline()
+var libc_msync_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_msync msync "/usr/lib/libSystem.B.dylib"
 
@@ -436,42 +436,42 @@ func Munlock(b []byte) (err error) {
 	} else {
 		_p0 = unsafe.Pointer(&_zero)
 	}
-	_, _, e1 := syscall_syscall(funcPC(libc_munlock_trampoline), uintptr(_p0), uintptr(len(b)), 0)
+	_, _, e1 := syscall_syscall(libc_munlock_trampoline_addr, uintptr(_p0), uintptr(len(b)), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_munlock_trampoline()
+var libc_munlock_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_munlock munlock "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Munlockall() (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_munlockall_trampoline), 0, 0, 0)
+	_, _, e1 := syscall_syscall(libc_munlockall_trampoline_addr, 0, 0, 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_munlockall_trampoline()
+var libc_munlockall_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_munlockall munlockall "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func pipe(p *[2]int32) (err error) {
-	_, _, e1 := syscall_rawSyscall(funcPC(libc_pipe_trampoline), uintptr(unsafe.Pointer(p)), 0, 0)
+	_, _, e1 := syscall_rawSyscall(libc_pipe_trampoline_addr, uintptr(unsafe.Pointer(p)), 0, 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_pipe_trampoline()
+var libc_pipe_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_pipe pipe "/usr/lib/libSystem.B.dylib"
 
@@ -488,7 +488,7 @@ func getxattr(path string, attr string, dest *byte, size int, position uint32, o
 	if err != nil {
 		return
 	}
-	r0, _, e1 := syscall_syscall6(funcPC(libc_getxattr_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), uintptr(unsafe.Pointer(dest)), uintptr(size), uintptr(position), uintptr(options))
+	r0, _, e1 := syscall_syscall6(libc_getxattr_trampoline_addr, uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), uintptr(unsafe.Pointer(dest)), uintptr(size), uintptr(position), uintptr(options))
 	sz = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -496,7 +496,7 @@ func getxattr(path string, attr string, dest *byte, size int, position uint32, o
 	return
 }
 
-func libc_getxattr_trampoline()
+var libc_getxattr_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_getxattr getxattr "/usr/lib/libSystem.B.dylib"
 
@@ -508,7 +508,7 @@ func fgetxattr(fd int, attr string, dest *byte, size int, position uint32, optio
 	if err != nil {
 		return
 	}
-	r0, _, e1 := syscall_syscall6(funcPC(libc_fgetxattr_trampoline), uintptr(fd), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(dest)), uintptr(size), uintptr(position), uintptr(options))
+	r0, _, e1 := syscall_syscall6(libc_fgetxattr_trampoline_addr, uintptr(fd), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(dest)), uintptr(size), uintptr(position), uintptr(options))
 	sz = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -516,7 +516,7 @@ func fgetxattr(fd int, attr string, dest *byte, size int, position uint32, optio
 	return
 }
 
-func libc_fgetxattr_trampoline()
+var libc_fgetxattr_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_fgetxattr fgetxattr "/usr/lib/libSystem.B.dylib"
 
@@ -533,14 +533,14 @@ func setxattr(path string, attr string, data *byte, size int, position uint32, o
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall6(funcPC(libc_setxattr_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), uintptr(unsafe.Pointer(data)), uintptr(size), uintptr(position), uintptr(options))
+	_, _, e1 := syscall_syscall6(libc_setxattr_trampoline_addr, uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), uintptr(unsafe.Pointer(data)), uintptr(size), uintptr(position), uintptr(options))
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_setxattr_trampoline()
+var libc_setxattr_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_setxattr setxattr "/usr/lib/libSystem.B.dylib"
 
@@ -552,14 +552,14 @@ func fsetxattr(fd int, attr string, data *byte, size int, position uint32, optio
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall6(funcPC(libc_fsetxattr_trampoline), uintptr(fd), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(data)), uintptr(size), uintptr(position), uintptr(options))
+	_, _, e1 := syscall_syscall6(libc_fsetxattr_trampoline_addr, uintptr(fd), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(data)), uintptr(size), uintptr(position), uintptr(options))
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_fsetxattr_trampoline()
+var libc_fsetxattr_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_fsetxattr fsetxattr "/usr/lib/libSystem.B.dylib"
 
@@ -576,14 +576,14 @@ func removexattr(path string, attr string, options int) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall(funcPC(libc_removexattr_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), uintptr(options))
+	_, _, e1 := syscall_syscall(libc_removexattr_trampoline_addr, uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), uintptr(options))
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_removexattr_trampoline()
+var libc_removexattr_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_removexattr removexattr "/usr/lib/libSystem.B.dylib"
 
@@ -595,14 +595,14 @@ func fremovexattr(fd int, attr string, options int) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall(funcPC(libc_fremovexattr_trampoline), uintptr(fd), uintptr(unsafe.Pointer(_p0)), uintptr(options))
+	_, _, e1 := syscall_syscall(libc_fremovexattr_trampoline_addr, uintptr(fd), uintptr(unsafe.Pointer(_p0)), uintptr(options))
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_fremovexattr_trampoline()
+var libc_fremovexattr_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_fremovexattr fremovexattr "/usr/lib/libSystem.B.dylib"
 
@@ -614,7 +614,7 @@ func listxattr(path string, dest *byte, size int, options int) (sz int, err erro
 	if err != nil {
 		return
 	}
-	r0, _, e1 := syscall_syscall6(funcPC(libc_listxattr_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(dest)), uintptr(size), uintptr(options), 0, 0)
+	r0, _, e1 := syscall_syscall6(libc_listxattr_trampoline_addr, uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(dest)), uintptr(size), uintptr(options), 0, 0)
 	sz = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -622,14 +622,14 @@ func listxattr(path string, dest *byte, size int, options int) (sz int, err erro
 	return
 }
 
-func libc_listxattr_trampoline()
+var libc_listxattr_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_listxattr listxattr "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func flistxattr(fd int, dest *byte, size int, options int) (sz int, err error) {
-	r0, _, e1 := syscall_syscall6(funcPC(libc_flistxattr_trampoline), uintptr(fd), uintptr(unsafe.Pointer(dest)), uintptr(size), uintptr(options), 0, 0)
+	r0, _, e1 := syscall_syscall6(libc_flistxattr_trampoline_addr, uintptr(fd), uintptr(unsafe.Pointer(dest)), uintptr(size), uintptr(options), 0, 0)
 	sz = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -637,28 +637,28 @@ func flistxattr(fd int, dest *byte, size int, options int) (sz int, err error) {
 	return
 }
 
-func libc_flistxattr_trampoline()
+var libc_flistxattr_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_flistxattr flistxattr "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func setattrlist(path *byte, list unsafe.Pointer, buf unsafe.Pointer, size uintptr, options int) (err error) {
-	_, _, e1 := syscall_syscall6(funcPC(libc_setattrlist_trampoline), uintptr(unsafe.Pointer(path)), uintptr(list), uintptr(buf), uintptr(size), uintptr(options), 0)
+	_, _, e1 := syscall_syscall6(libc_setattrlist_trampoline_addr, uintptr(unsafe.Pointer(path)), uintptr(list), uintptr(buf), uintptr(size), uintptr(options), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_setattrlist_trampoline()
+var libc_setattrlist_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_setattrlist setattrlist "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func fcntl(fd int, cmd int, arg int) (val int, err error) {
-	r0, _, e1 := syscall_syscall(funcPC(libc_fcntl_trampoline), uintptr(fd), uintptr(cmd), uintptr(arg))
+	r0, _, e1 := syscall_syscall(libc_fcntl_trampoline_addr, uintptr(fd), uintptr(cmd), uintptr(arg))
 	val = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -666,35 +666,35 @@ func fcntl(fd int, cmd int, arg int) (val int, err error) {
 	return
 }
 
-func libc_fcntl_trampoline()
+var libc_fcntl_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_fcntl fcntl "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func kill(pid int, signum int, posix int) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_kill_trampoline), uintptr(pid), uintptr(signum), uintptr(posix))
+	_, _, e1 := syscall_syscall(libc_kill_trampoline_addr, uintptr(pid), uintptr(signum), uintptr(posix))
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_kill_trampoline()
+var libc_kill_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_kill kill "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func ioctl(fd int, req uint, arg uintptr) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_ioctl_trampoline), uintptr(fd), uintptr(req), uintptr(arg))
+	_, _, e1 := syscall_syscall(libc_ioctl_trampoline_addr, uintptr(fd), uintptr(req), uintptr(arg))
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_ioctl_trampoline()
+var libc_ioctl_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_ioctl ioctl "/usr/lib/libSystem.B.dylib"
 
@@ -707,28 +707,28 @@ func sysctl(mib []_C_int, old *byte, oldlen *uintptr, new *byte, newlen uintptr)
 	} else {
 		_p0 = unsafe.Pointer(&_zero)
 	}
-	_, _, e1 := syscall_syscall6(funcPC(libc_sysctl_trampoline), uintptr(_p0), uintptr(len(mib)), uintptr(unsafe.Pointer(old)), uintptr(unsafe.Pointer(oldlen)), uintptr(unsafe.Pointer(new)), uintptr(newlen))
+	_, _, e1 := syscall_syscall6(libc_sysctl_trampoline_addr, uintptr(_p0), uintptr(len(mib)), uintptr(unsafe.Pointer(old)), uintptr(unsafe.Pointer(oldlen)), uintptr(unsafe.Pointer(new)), uintptr(newlen))
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_sysctl_trampoline()
+var libc_sysctl_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_sysctl sysctl "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func sendfile(infd int, outfd int, offset int64, len *int64, hdtr unsafe.Pointer, flags int) (err error) {
-	_, _, e1 := syscall_syscall6(funcPC(libc_sendfile_trampoline), uintptr(infd), uintptr(outfd), uintptr(offset), uintptr(unsafe.Pointer(len)), uintptr(hdtr), uintptr(flags))
+	_, _, e1 := syscall_syscall6(libc_sendfile_trampoline_addr, uintptr(infd), uintptr(outfd), uintptr(offset), uintptr(unsafe.Pointer(len)), uintptr(hdtr), uintptr(flags))
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_sendfile_trampoline()
+var libc_sendfile_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_sendfile sendfile "/usr/lib/libSystem.B.dylib"
 
@@ -740,28 +740,28 @@ func Access(path string, mode uint32) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall(funcPC(libc_access_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(mode), 0)
+	_, _, e1 := syscall_syscall(libc_access_trampoline_addr, uintptr(unsafe.Pointer(_p0)), uintptr(mode), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_access_trampoline()
+var libc_access_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_access access "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Adjtime(delta *Timeval, olddelta *Timeval) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_adjtime_trampoline), uintptr(unsafe.Pointer(delta)), uintptr(unsafe.Pointer(olddelta)), 0)
+	_, _, e1 := syscall_syscall(libc_adjtime_trampoline_addr, uintptr(unsafe.Pointer(delta)), uintptr(unsafe.Pointer(olddelta)), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_adjtime_trampoline()
+var libc_adjtime_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_adjtime adjtime "/usr/lib/libSystem.B.dylib"
 
@@ -773,14 +773,14 @@ func Chdir(path string) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall(funcPC(libc_chdir_trampoline), uintptr(unsafe.Pointer(_p0)), 0, 0)
+	_, _, e1 := syscall_syscall(libc_chdir_trampoline_addr, uintptr(unsafe.Pointer(_p0)), 0, 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_chdir_trampoline()
+var libc_chdir_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_chdir chdir "/usr/lib/libSystem.B.dylib"
 
@@ -792,14 +792,14 @@ func Chflags(path string, flags int) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall(funcPC(libc_chflags_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(flags), 0)
+	_, _, e1 := syscall_syscall(libc_chflags_trampoline_addr, uintptr(unsafe.Pointer(_p0)), uintptr(flags), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_chflags_trampoline()
+var libc_chflags_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_chflags chflags "/usr/lib/libSystem.B.dylib"
 
@@ -811,14 +811,14 @@ func Chmod(path string, mode uint32) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall(funcPC(libc_chmod_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(mode), 0)
+	_, _, e1 := syscall_syscall(libc_chmod_trampoline_addr, uintptr(unsafe.Pointer(_p0)), uintptr(mode), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_chmod_trampoline()
+var libc_chmod_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_chmod chmod "/usr/lib/libSystem.B.dylib"
 
@@ -830,14 +830,14 @@ func Chown(path string, uid int, gid int) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall(funcPC(libc_chown_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(uid), uintptr(gid))
+	_, _, e1 := syscall_syscall(libc_chown_trampoline_addr, uintptr(unsafe.Pointer(_p0)), uintptr(uid), uintptr(gid))
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_chown_trampoline()
+var libc_chown_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_chown chown "/usr/lib/libSystem.B.dylib"
 
@@ -849,42 +849,42 @@ func Chroot(path string) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall(funcPC(libc_chroot_trampoline), uintptr(unsafe.Pointer(_p0)), 0, 0)
+	_, _, e1 := syscall_syscall(libc_chroot_trampoline_addr, uintptr(unsafe.Pointer(_p0)), 0, 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_chroot_trampoline()
+var libc_chroot_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_chroot chroot "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func ClockGettime(clockid int32, time *Timespec) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_clock_gettime_trampoline), uintptr(clockid), uintptr(unsafe.Pointer(time)), 0)
+	_, _, e1 := syscall_syscall(libc_clock_gettime_trampoline_addr, uintptr(clockid), uintptr(unsafe.Pointer(time)), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_clock_gettime_trampoline()
+var libc_clock_gettime_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_clock_gettime clock_gettime "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Close(fd int) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_close_trampoline), uintptr(fd), 0, 0)
+	_, _, e1 := syscall_syscall(libc_close_trampoline_addr, uintptr(fd), 0, 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_close_trampoline()
+var libc_close_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_close close "/usr/lib/libSystem.B.dylib"
 
@@ -901,14 +901,14 @@ func Clonefile(src string, dst string, flags int) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall(funcPC(libc_clonefile_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), uintptr(flags))
+	_, _, e1 := syscall_syscall(libc_clonefile_trampoline_addr, uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), uintptr(flags))
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_clonefile_trampoline()
+var libc_clonefile_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_clonefile clonefile "/usr/lib/libSystem.B.dylib"
 
@@ -925,21 +925,21 @@ func Clonefileat(srcDirfd int, src string, dstDirfd int, dst string, flags int)
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall6(funcPC(libc_clonefileat_trampoline), uintptr(srcDirfd), uintptr(unsafe.Pointer(_p0)), uintptr(dstDirfd), uintptr(unsafe.Pointer(_p1)), uintptr(flags), 0)
+	_, _, e1 := syscall_syscall6(libc_clonefileat_trampoline_addr, uintptr(srcDirfd), uintptr(unsafe.Pointer(_p0)), uintptr(dstDirfd), uintptr(unsafe.Pointer(_p1)), uintptr(flags), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_clonefileat_trampoline()
+var libc_clonefileat_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_clonefileat clonefileat "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Dup(fd int) (nfd int, err error) {
-	r0, _, e1 := syscall_syscall(funcPC(libc_dup_trampoline), uintptr(fd), 0, 0)
+	r0, _, e1 := syscall_syscall(libc_dup_trampoline_addr, uintptr(fd), 0, 0)
 	nfd = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -947,21 +947,21 @@ func Dup(fd int) (nfd int, err error) {
 	return
 }
 
-func libc_dup_trampoline()
+var libc_dup_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_dup dup "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Dup2(from int, to int) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_dup2_trampoline), uintptr(from), uintptr(to), 0)
+	_, _, e1 := syscall_syscall(libc_dup2_trampoline_addr, uintptr(from), uintptr(to), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_dup2_trampoline()
+var libc_dup2_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_dup2 dup2 "/usr/lib/libSystem.B.dylib"
 
@@ -978,25 +978,25 @@ func Exchangedata(path1 string, path2 string, options int) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall(funcPC(libc_exchangedata_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), uintptr(options))
+	_, _, e1 := syscall_syscall(libc_exchangedata_trampoline_addr, uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), uintptr(options))
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_exchangedata_trampoline()
+var libc_exchangedata_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_exchangedata exchangedata "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Exit(code int) {
-	syscall_syscall(funcPC(libc_exit_trampoline), uintptr(code), 0, 0)
+	syscall_syscall(libc_exit_trampoline_addr, uintptr(code), 0, 0)
 	return
 }
 
-func libc_exit_trampoline()
+var libc_exit_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_exit exit "/usr/lib/libSystem.B.dylib"
 
@@ -1008,56 +1008,56 @@ func Faccessat(dirfd int, path string, mode uint32, flags int) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall6(funcPC(libc_faccessat_trampoline), uintptr(dirfd), uintptr(unsafe.Pointer(_p0)), uintptr(mode), uintptr(flags), 0, 0)
+	_, _, e1 := syscall_syscall6(libc_faccessat_trampoline_addr, uintptr(dirfd), uintptr(unsafe.Pointer(_p0)), uintptr(mode), uintptr(flags), 0, 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_faccessat_trampoline()
+var libc_faccessat_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_faccessat faccessat "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Fchdir(fd int) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_fchdir_trampoline), uintptr(fd), 0, 0)
+	_, _, e1 := syscall_syscall(libc_fchdir_trampoline_addr, uintptr(fd), 0, 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_fchdir_trampoline()
+var libc_fchdir_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_fchdir fchdir "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Fchflags(fd int, flags int) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_fchflags_trampoline), uintptr(fd), uintptr(flags), 0)
+	_, _, e1 := syscall_syscall(libc_fchflags_trampoline_addr, uintptr(fd), uintptr(flags), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_fchflags_trampoline()
+var libc_fchflags_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_fchflags fchflags "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Fchmod(fd int, mode uint32) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_fchmod_trampoline), uintptr(fd), uintptr(mode), 0)
+	_, _, e1 := syscall_syscall(libc_fchmod_trampoline_addr, uintptr(fd), uintptr(mode), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_fchmod_trampoline()
+var libc_fchmod_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_fchmod fchmod "/usr/lib/libSystem.B.dylib"
 
@@ -1069,28 +1069,28 @@ func Fchmodat(dirfd int, path string, mode uint32, flags int) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall6(funcPC(libc_fchmodat_trampoline), uintptr(dirfd), uintptr(unsafe.Pointer(_p0)), uintptr(mode), uintptr(flags), 0, 0)
+	_, _, e1 := syscall_syscall6(libc_fchmodat_trampoline_addr, uintptr(dirfd), uintptr(unsafe.Pointer(_p0)), uintptr(mode), uintptr(flags), 0, 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_fchmodat_trampoline()
+var libc_fchmodat_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_fchmodat fchmodat "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Fchown(fd int, uid int, gid int) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_fchown_trampoline), uintptr(fd), uintptr(uid), uintptr(gid))
+	_, _, e1 := syscall_syscall(libc_fchown_trampoline_addr, uintptr(fd), uintptr(uid), uintptr(gid))
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_fchown_trampoline()
+var libc_fchown_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_fchown fchown "/usr/lib/libSystem.B.dylib"
 
@@ -1102,14 +1102,14 @@ func Fchownat(dirfd int, path string, uid int, gid int, flags int) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall6(funcPC(libc_fchownat_trampoline), uintptr(dirfd), uintptr(unsafe.Pointer(_p0)), uintptr(uid), uintptr(gid), uintptr(flags), 0)
+	_, _, e1 := syscall_syscall6(libc_fchownat_trampoline_addr, uintptr(dirfd), uintptr(unsafe.Pointer(_p0)), uintptr(uid), uintptr(gid), uintptr(flags), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_fchownat_trampoline()
+var libc_fchownat_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_fchownat fchownat "/usr/lib/libSystem.B.dylib"
 
@@ -1121,35 +1121,35 @@ func Fclonefileat(srcDirfd int, dstDirfd int, dst string, flags int) (err error)
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall6(funcPC(libc_fclonefileat_trampoline), uintptr(srcDirfd), uintptr(dstDirfd), uintptr(unsafe.Pointer(_p0)), uintptr(flags), 0, 0)
+	_, _, e1 := syscall_syscall6(libc_fclonefileat_trampoline_addr, uintptr(srcDirfd), uintptr(dstDirfd), uintptr(unsafe.Pointer(_p0)), uintptr(flags), 0, 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_fclonefileat_trampoline()
+var libc_fclonefileat_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_fclonefileat fclonefileat "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Flock(fd int, how int) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_flock_trampoline), uintptr(fd), uintptr(how), 0)
+	_, _, e1 := syscall_syscall(libc_flock_trampoline_addr, uintptr(fd), uintptr(how), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_flock_trampoline()
+var libc_flock_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_flock flock "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Fpathconf(fd int, name int) (val int, err error) {
-	r0, _, e1 := syscall_syscall(funcPC(libc_fpathconf_trampoline), uintptr(fd), uintptr(name), 0)
+	r0, _, e1 := syscall_syscall(libc_fpathconf_trampoline_addr, uintptr(fd), uintptr(name), 0)
 	val = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -1157,35 +1157,35 @@ func Fpathconf(fd int, name int) (val int, err error) {
 	return
 }
 
-func libc_fpathconf_trampoline()
+var libc_fpathconf_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_fpathconf fpathconf "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Fsync(fd int) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_fsync_trampoline), uintptr(fd), 0, 0)
+	_, _, e1 := syscall_syscall(libc_fsync_trampoline_addr, uintptr(fd), 0, 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_fsync_trampoline()
+var libc_fsync_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_fsync fsync "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Ftruncate(fd int, length int64) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_ftruncate_trampoline), uintptr(fd), uintptr(length), 0)
+	_, _, e1 := syscall_syscall(libc_ftruncate_trampoline_addr, uintptr(fd), uintptr(length), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_ftruncate_trampoline()
+var libc_ftruncate_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_ftruncate ftruncate "/usr/lib/libSystem.B.dylib"
 
@@ -1198,7 +1198,7 @@ func Getcwd(buf []byte) (n int, err error) {
 	} else {
 		_p0 = unsafe.Pointer(&_zero)
 	}
-	r0, _, e1 := syscall_syscall(funcPC(libc_getcwd_trampoline), uintptr(_p0), uintptr(len(buf)), 0)
+	r0, _, e1 := syscall_syscall(libc_getcwd_trampoline_addr, uintptr(_p0), uintptr(len(buf)), 0)
 	n = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -1206,62 +1206,62 @@ func Getcwd(buf []byte) (n int, err error) {
 	return
 }
 
-func libc_getcwd_trampoline()
+var libc_getcwd_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_getcwd getcwd "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Getdtablesize() (size int) {
-	r0, _, _ := syscall_syscall(funcPC(libc_getdtablesize_trampoline), 0, 0, 0)
+	r0, _, _ := syscall_syscall(libc_getdtablesize_trampoline_addr, 0, 0, 0)
 	size = int(r0)
 	return
 }
 
-func libc_getdtablesize_trampoline()
+var libc_getdtablesize_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_getdtablesize getdtablesize "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Getegid() (egid int) {
-	r0, _, _ := syscall_rawSyscall(funcPC(libc_getegid_trampoline), 0, 0, 0)
+	r0, _, _ := syscall_rawSyscall(libc_getegid_trampoline_addr, 0, 0, 0)
 	egid = int(r0)
 	return
 }
 
-func libc_getegid_trampoline()
+var libc_getegid_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_getegid getegid "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Geteuid() (uid int) {
-	r0, _, _ := syscall_rawSyscall(funcPC(libc_geteuid_trampoline), 0, 0, 0)
+	r0, _, _ := syscall_rawSyscall(libc_geteuid_trampoline_addr, 0, 0, 0)
 	uid = int(r0)
 	return
 }
 
-func libc_geteuid_trampoline()
+var libc_geteuid_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_geteuid geteuid "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Getgid() (gid int) {
-	r0, _, _ := syscall_rawSyscall(funcPC(libc_getgid_trampoline), 0, 0, 0)
+	r0, _, _ := syscall_rawSyscall(libc_getgid_trampoline_addr, 0, 0, 0)
 	gid = int(r0)
 	return
 }
 
-func libc_getgid_trampoline()
+var libc_getgid_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_getgid getgid "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Getpgid(pid int) (pgid int, err error) {
-	r0, _, e1 := syscall_rawSyscall(funcPC(libc_getpgid_trampoline), uintptr(pid), 0, 0)
+	r0, _, e1 := syscall_rawSyscall(libc_getpgid_trampoline_addr, uintptr(pid), 0, 0)
 	pgid = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -1269,50 +1269,50 @@ func Getpgid(pid int) (pgid int, err error) {
 	return
 }
 
-func libc_getpgid_trampoline()
+var libc_getpgid_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_getpgid getpgid "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Getpgrp() (pgrp int) {
-	r0, _, _ := syscall_rawSyscall(funcPC(libc_getpgrp_trampoline), 0, 0, 0)
+	r0, _, _ := syscall_rawSyscall(libc_getpgrp_trampoline_addr, 0, 0, 0)
 	pgrp = int(r0)
 	return
 }
 
-func libc_getpgrp_trampoline()
+var libc_getpgrp_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_getpgrp getpgrp "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Getpid() (pid int) {
-	r0, _, _ := syscall_rawSyscall(funcPC(libc_getpid_trampoline), 0, 0, 0)
+	r0, _, _ := syscall_rawSyscall(libc_getpid_trampoline_addr, 0, 0, 0)
 	pid = int(r0)
 	return
 }
 
-func libc_getpid_trampoline()
+var libc_getpid_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_getpid getpid "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Getppid() (ppid int) {
-	r0, _, _ := syscall_rawSyscall(funcPC(libc_getppid_trampoline), 0, 0, 0)
+	r0, _, _ := syscall_rawSyscall(libc_getppid_trampoline_addr, 0, 0, 0)
 	ppid = int(r0)
 	return
 }
 
-func libc_getppid_trampoline()
+var libc_getppid_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_getppid getppid "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Getpriority(which int, who int) (prio int, err error) {
-	r0, _, e1 := syscall_syscall(funcPC(libc_getpriority_trampoline), uintptr(which), uintptr(who), 0)
+	r0, _, e1 := syscall_syscall(libc_getpriority_trampoline_addr, uintptr(which), uintptr(who), 0)
 	prio = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -1320,42 +1320,42 @@ func Getpriority(which int, who int) (prio int, err error) {
 	return
 }
 
-func libc_getpriority_trampoline()
+var libc_getpriority_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_getpriority getpriority "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Getrlimit(which int, lim *Rlimit) (err error) {
-	_, _, e1 := syscall_rawSyscall(funcPC(libc_getrlimit_trampoline), uintptr(which), uintptr(unsafe.Pointer(lim)), 0)
+	_, _, e1 := syscall_rawSyscall(libc_getrlimit_trampoline_addr, uintptr(which), uintptr(unsafe.Pointer(lim)), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_getrlimit_trampoline()
+var libc_getrlimit_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_getrlimit getrlimit "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Getrusage(who int, rusage *Rusage) (err error) {
-	_, _, e1 := syscall_rawSyscall(funcPC(libc_getrusage_trampoline), uintptr(who), uintptr(unsafe.Pointer(rusage)), 0)
+	_, _, e1 := syscall_rawSyscall(libc_getrusage_trampoline_addr, uintptr(who), uintptr(unsafe.Pointer(rusage)), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_getrusage_trampoline()
+var libc_getrusage_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_getrusage getrusage "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Getsid(pid int) (sid int, err error) {
-	r0, _, e1 := syscall_rawSyscall(funcPC(libc_getsid_trampoline), uintptr(pid), 0, 0)
+	r0, _, e1 := syscall_rawSyscall(libc_getsid_trampoline_addr, uintptr(pid), 0, 0)
 	sid = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -1363,52 +1363,52 @@ func Getsid(pid int) (sid int, err error) {
 	return
 }
 
-func libc_getsid_trampoline()
+var libc_getsid_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_getsid getsid "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Gettimeofday(tp *Timeval) (err error) {
-	_, _, e1 := syscall_rawSyscall(funcPC(libc_gettimeofday_trampoline), uintptr(unsafe.Pointer(tp)), 0, 0)
+	_, _, e1 := syscall_rawSyscall(libc_gettimeofday_trampoline_addr, uintptr(unsafe.Pointer(tp)), 0, 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_gettimeofday_trampoline()
+var libc_gettimeofday_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_gettimeofday gettimeofday "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Getuid() (uid int) {
-	r0, _, _ := syscall_rawSyscall(funcPC(libc_getuid_trampoline), 0, 0, 0)
+	r0, _, _ := syscall_rawSyscall(libc_getuid_trampoline_addr, 0, 0, 0)
 	uid = int(r0)
 	return
 }
 
-func libc_getuid_trampoline()
+var libc_getuid_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_getuid getuid "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Issetugid() (tainted bool) {
-	r0, _, _ := syscall_rawSyscall(funcPC(libc_issetugid_trampoline), 0, 0, 0)
+	r0, _, _ := syscall_rawSyscall(libc_issetugid_trampoline_addr, 0, 0, 0)
 	tainted = bool(r0 != 0)
 	return
 }
 
-func libc_issetugid_trampoline()
+var libc_issetugid_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_issetugid issetugid "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Kqueue() (fd int, err error) {
-	r0, _, e1 := syscall_syscall(funcPC(libc_kqueue_trampoline), 0, 0, 0)
+	r0, _, e1 := syscall_syscall(libc_kqueue_trampoline_addr, 0, 0, 0)
 	fd = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -1416,7 +1416,7 @@ func Kqueue() (fd int, err error) {
 	return
 }
 
-func libc_kqueue_trampoline()
+var libc_kqueue_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_kqueue kqueue "/usr/lib/libSystem.B.dylib"
 
@@ -1428,14 +1428,14 @@ func Lchown(path string, uid int, gid int) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall(funcPC(libc_lchown_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(uid), uintptr(gid))
+	_, _, e1 := syscall_syscall(libc_lchown_trampoline_addr, uintptr(unsafe.Pointer(_p0)), uintptr(uid), uintptr(gid))
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_lchown_trampoline()
+var libc_lchown_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_lchown lchown "/usr/lib/libSystem.B.dylib"
 
@@ -1452,14 +1452,14 @@ func Link(path string, link string) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall(funcPC(libc_link_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), 0)
+	_, _, e1 := syscall_syscall(libc_link_trampoline_addr, uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_link_trampoline()
+var libc_link_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_link link "/usr/lib/libSystem.B.dylib"
 
@@ -1476,28 +1476,28 @@ func Linkat(pathfd int, path string, linkfd int, link string, flags int) (err er
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall6(funcPC(libc_linkat_trampoline), uintptr(pathfd), uintptr(unsafe.Pointer(_p0)), uintptr(linkfd), uintptr(unsafe.Pointer(_p1)), uintptr(flags), 0)
+	_, _, e1 := syscall_syscall6(libc_linkat_trampoline_addr, uintptr(pathfd), uintptr(unsafe.Pointer(_p0)), uintptr(linkfd), uintptr(unsafe.Pointer(_p1)), uintptr(flags), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_linkat_trampoline()
+var libc_linkat_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_linkat linkat "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Listen(s int, backlog int) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_listen_trampoline), uintptr(s), uintptr(backlog), 0)
+	_, _, e1 := syscall_syscall(libc_listen_trampoline_addr, uintptr(s), uintptr(backlog), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_listen_trampoline()
+var libc_listen_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_listen listen "/usr/lib/libSystem.B.dylib"
 
@@ -1509,14 +1509,14 @@ func Mkdir(path string, mode uint32) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall(funcPC(libc_mkdir_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(mode), 0)
+	_, _, e1 := syscall_syscall(libc_mkdir_trampoline_addr, uintptr(unsafe.Pointer(_p0)), uintptr(mode), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_mkdir_trampoline()
+var libc_mkdir_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_mkdir mkdir "/usr/lib/libSystem.B.dylib"
 
@@ -1528,14 +1528,14 @@ func Mkdirat(dirfd int, path string, mode uint32) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall(funcPC(libc_mkdirat_trampoline), uintptr(dirfd), uintptr(unsafe.Pointer(_p0)), uintptr(mode))
+	_, _, e1 := syscall_syscall(libc_mkdirat_trampoline_addr, uintptr(dirfd), uintptr(unsafe.Pointer(_p0)), uintptr(mode))
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_mkdirat_trampoline()
+var libc_mkdirat_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_mkdirat mkdirat "/usr/lib/libSystem.B.dylib"
 
@@ -1547,14 +1547,14 @@ func Mkfifo(path string, mode uint32) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall(funcPC(libc_mkfifo_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(mode), 0)
+	_, _, e1 := syscall_syscall(libc_mkfifo_trampoline_addr, uintptr(unsafe.Pointer(_p0)), uintptr(mode), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_mkfifo_trampoline()
+var libc_mkfifo_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_mkfifo mkfifo "/usr/lib/libSystem.B.dylib"
 
@@ -1566,14 +1566,14 @@ func Mknod(path string, mode uint32, dev int) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall(funcPC(libc_mknod_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(mode), uintptr(dev))
+	_, _, e1 := syscall_syscall(libc_mknod_trampoline_addr, uintptr(unsafe.Pointer(_p0)), uintptr(mode), uintptr(dev))
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_mknod_trampoline()
+var libc_mknod_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_mknod mknod "/usr/lib/libSystem.B.dylib"
 
@@ -1585,7 +1585,7 @@ func Open(path string, mode int, perm uint32) (fd int, err error) {
 	if err != nil {
 		return
 	}
-	r0, _, e1 := syscall_syscall(funcPC(libc_open_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(mode), uintptr(perm))
+	r0, _, e1 := syscall_syscall(libc_open_trampoline_addr, uintptr(unsafe.Pointer(_p0)), uintptr(mode), uintptr(perm))
 	fd = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -1593,7 +1593,7 @@ func Open(path string, mode int, perm uint32) (fd int, err error) {
 	return
 }
 
-func libc_open_trampoline()
+var libc_open_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_open open "/usr/lib/libSystem.B.dylib"
 
@@ -1605,7 +1605,7 @@ func Openat(dirfd int, path string, mode int, perm uint32) (fd int, err error) {
 	if err != nil {
 		return
 	}
-	r0, _, e1 := syscall_syscall6(funcPC(libc_openat_trampoline), uintptr(dirfd), uintptr(unsafe.Pointer(_p0)), uintptr(mode), uintptr(perm), 0, 0)
+	r0, _, e1 := syscall_syscall6(libc_openat_trampoline_addr, uintptr(dirfd), uintptr(unsafe.Pointer(_p0)), uintptr(mode), uintptr(perm), 0, 0)
 	fd = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -1613,7 +1613,7 @@ func Openat(dirfd int, path string, mode int, perm uint32) (fd int, err error) {
 	return
 }
 
-func libc_openat_trampoline()
+var libc_openat_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_openat openat "/usr/lib/libSystem.B.dylib"
 
@@ -1625,7 +1625,7 @@ func Pathconf(path string, name int) (val int, err error) {
 	if err != nil {
 		return
 	}
-	r0, _, e1 := syscall_syscall(funcPC(libc_pathconf_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(name), 0)
+	r0, _, e1 := syscall_syscall(libc_pathconf_trampoline_addr, uintptr(unsafe.Pointer(_p0)), uintptr(name), 0)
 	val = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -1633,7 +1633,7 @@ func Pathconf(path string, name int) (val int, err error) {
 	return
 }
 
-func libc_pathconf_trampoline()
+var libc_pathconf_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_pathconf pathconf "/usr/lib/libSystem.B.dylib"
 
@@ -1646,7 +1646,7 @@ func Pread(fd int, p []byte, offset int64) (n int, err error) {
 	} else {
 		_p0 = unsafe.Pointer(&_zero)
 	}
-	r0, _, e1 := syscall_syscall6(funcPC(libc_pread_trampoline), uintptr(fd), uintptr(_p0), uintptr(len(p)), uintptr(offset), 0, 0)
+	r0, _, e1 := syscall_syscall6(libc_pread_trampoline_addr, uintptr(fd), uintptr(_p0), uintptr(len(p)), uintptr(offset), 0, 0)
 	n = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -1654,7 +1654,7 @@ func Pread(fd int, p []byte, offset int64) (n int, err error) {
 	return
 }
 
-func libc_pread_trampoline()
+var libc_pread_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_pread pread "/usr/lib/libSystem.B.dylib"
 
@@ -1667,7 +1667,7 @@ func Pwrite(fd int, p []byte, offset int64) (n int, err error) {
 	} else {
 		_p0 = unsafe.Pointer(&_zero)
 	}
-	r0, _, e1 := syscall_syscall6(funcPC(libc_pwrite_trampoline), uintptr(fd), uintptr(_p0), uintptr(len(p)), uintptr(offset), 0, 0)
+	r0, _, e1 := syscall_syscall6(libc_pwrite_trampoline_addr, uintptr(fd), uintptr(_p0), uintptr(len(p)), uintptr(offset), 0, 0)
 	n = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -1675,7 +1675,7 @@ func Pwrite(fd int, p []byte, offset int64) (n int, err error) {
 	return
 }
 
-func libc_pwrite_trampoline()
+var libc_pwrite_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_pwrite pwrite "/usr/lib/libSystem.B.dylib"
 
@@ -1688,7 +1688,7 @@ func read(fd int, p []byte) (n int, err error) {
 	} else {
 		_p0 = unsafe.Pointer(&_zero)
 	}
-	r0, _, e1 := syscall_syscall(funcPC(libc_read_trampoline), uintptr(fd), uintptr(_p0), uintptr(len(p)))
+	r0, _, e1 := syscall_syscall(libc_read_trampoline_addr, uintptr(fd), uintptr(_p0), uintptr(len(p)))
 	n = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -1696,7 +1696,7 @@ func read(fd int, p []byte) (n int, err error) {
 	return
 }
 
-func libc_read_trampoline()
+var libc_read_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_read read "/usr/lib/libSystem.B.dylib"
 
@@ -1714,7 +1714,7 @@ func Readlink(path string, buf []byte) (n int, err error) {
 	} else {
 		_p1 = unsafe.Pointer(&_zero)
 	}
-	r0, _, e1 := syscall_syscall(funcPC(libc_readlink_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(_p1), uintptr(len(buf)))
+	r0, _, e1 := syscall_syscall(libc_readlink_trampoline_addr, uintptr(unsafe.Pointer(_p0)), uintptr(_p1), uintptr(len(buf)))
 	n = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -1722,7 +1722,7 @@ func Readlink(path string, buf []byte) (n int, err error) {
 	return
 }
 
-func libc_readlink_trampoline()
+var libc_readlink_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_readlink readlink "/usr/lib/libSystem.B.dylib"
 
@@ -1740,7 +1740,7 @@ func Readlinkat(dirfd int, path string, buf []byte) (n int, err error) {
 	} else {
 		_p1 = unsafe.Pointer(&_zero)
 	}
-	r0, _, e1 := syscall_syscall6(funcPC(libc_readlinkat_trampoline), uintptr(dirfd), uintptr(unsafe.Pointer(_p0)), uintptr(_p1), uintptr(len(buf)), 0, 0)
+	r0, _, e1 := syscall_syscall6(libc_readlinkat_trampoline_addr, uintptr(dirfd), uintptr(unsafe.Pointer(_p0)), uintptr(_p1), uintptr(len(buf)), 0, 0)
 	n = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -1748,7 +1748,7 @@ func Readlinkat(dirfd int, path string, buf []byte) (n int, err error) {
 	return
 }
 
-func libc_readlinkat_trampoline()
+var libc_readlinkat_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_readlinkat readlinkat "/usr/lib/libSystem.B.dylib"
 
@@ -1765,14 +1765,14 @@ func Rename(from string, to string) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall(funcPC(libc_rename_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), 0)
+	_, _, e1 := syscall_syscall(libc_rename_trampoline_addr, uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_rename_trampoline()
+var libc_rename_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_rename rename "/usr/lib/libSystem.B.dylib"
 
@@ -1789,14 +1789,14 @@ func Renameat(fromfd int, from string, tofd int, to string) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall6(funcPC(libc_renameat_trampoline), uintptr(fromfd), uintptr(unsafe.Pointer(_p0)), uintptr(tofd), uintptr(unsafe.Pointer(_p1)), 0, 0)
+	_, _, e1 := syscall_syscall6(libc_renameat_trampoline_addr, uintptr(fromfd), uintptr(unsafe.Pointer(_p0)), uintptr(tofd), uintptr(unsafe.Pointer(_p1)), 0, 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_renameat_trampoline()
+var libc_renameat_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_renameat renameat "/usr/lib/libSystem.B.dylib"
 
@@ -1808,14 +1808,14 @@ func Revoke(path string) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall(funcPC(libc_revoke_trampoline), uintptr(unsafe.Pointer(_p0)), 0, 0)
+	_, _, e1 := syscall_syscall(libc_revoke_trampoline_addr, uintptr(unsafe.Pointer(_p0)), 0, 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_revoke_trampoline()
+var libc_revoke_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_revoke revoke "/usr/lib/libSystem.B.dylib"
 
@@ -1827,21 +1827,21 @@ func Rmdir(path string) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall(funcPC(libc_rmdir_trampoline), uintptr(unsafe.Pointer(_p0)), 0, 0)
+	_, _, e1 := syscall_syscall(libc_rmdir_trampoline_addr, uintptr(unsafe.Pointer(_p0)), 0, 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_rmdir_trampoline()
+var libc_rmdir_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_rmdir rmdir "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Seek(fd int, offset int64, whence int) (newoffset int64, err error) {
-	r0, _, e1 := syscall_syscall(funcPC(libc_lseek_trampoline), uintptr(fd), uintptr(offset), uintptr(whence))
+	r0, _, e1 := syscall_syscall(libc_lseek_trampoline_addr, uintptr(fd), uintptr(offset), uintptr(whence))
 	newoffset = int64(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -1849,14 +1849,14 @@ func Seek(fd int, offset int64, whence int) (newoffset int64, err error) {
 	return
 }
 
-func libc_lseek_trampoline()
+var libc_lseek_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_lseek lseek "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error) {
-	r0, _, e1 := syscall_syscall6(funcPC(libc_select_trampoline), uintptr(nfd), uintptr(unsafe.Pointer(r)), uintptr(unsafe.Pointer(w)), uintptr(unsafe.Pointer(e)), uintptr(unsafe.Pointer(timeout)), 0)
+	r0, _, e1 := syscall_syscall6(libc_select_trampoline_addr, uintptr(nfd), uintptr(unsafe.Pointer(r)), uintptr(unsafe.Pointer(w)), uintptr(unsafe.Pointer(e)), uintptr(unsafe.Pointer(timeout)), 0)
 	n = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -1864,49 +1864,49 @@ func Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err
 	return
 }
 
-func libc_select_trampoline()
+var libc_select_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_select select "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Setegid(egid int) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_setegid_trampoline), uintptr(egid), 0, 0)
+	_, _, e1 := syscall_syscall(libc_setegid_trampoline_addr, uintptr(egid), 0, 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_setegid_trampoline()
+var libc_setegid_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_setegid setegid "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Seteuid(euid int) (err error) {
-	_, _, e1 := syscall_rawSyscall(funcPC(libc_seteuid_trampoline), uintptr(euid), 0, 0)
+	_, _, e1 := syscall_rawSyscall(libc_seteuid_trampoline_addr, uintptr(euid), 0, 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_seteuid_trampoline()
+var libc_seteuid_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_seteuid seteuid "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Setgid(gid int) (err error) {
-	_, _, e1 := syscall_rawSyscall(funcPC(libc_setgid_trampoline), uintptr(gid), 0, 0)
+	_, _, e1 := syscall_rawSyscall(libc_setgid_trampoline_addr, uintptr(gid), 0, 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_setgid_trampoline()
+var libc_setgid_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_setgid setgid "/usr/lib/libSystem.B.dylib"
 
@@ -1918,105 +1918,105 @@ func Setlogin(name string) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall(funcPC(libc_setlogin_trampoline), uintptr(unsafe.Pointer(_p0)), 0, 0)
+	_, _, e1 := syscall_syscall(libc_setlogin_trampoline_addr, uintptr(unsafe.Pointer(_p0)), 0, 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_setlogin_trampoline()
+var libc_setlogin_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_setlogin setlogin "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Setpgid(pid int, pgid int) (err error) {
-	_, _, e1 := syscall_rawSyscall(funcPC(libc_setpgid_trampoline), uintptr(pid), uintptr(pgid), 0)
+	_, _, e1 := syscall_rawSyscall(libc_setpgid_trampoline_addr, uintptr(pid), uintptr(pgid), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_setpgid_trampoline()
+var libc_setpgid_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_setpgid setpgid "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Setpriority(which int, who int, prio int) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_setpriority_trampoline), uintptr(which), uintptr(who), uintptr(prio))
+	_, _, e1 := syscall_syscall(libc_setpriority_trampoline_addr, uintptr(which), uintptr(who), uintptr(prio))
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_setpriority_trampoline()
+var libc_setpriority_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_setpriority setpriority "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Setprivexec(flag int) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_setprivexec_trampoline), uintptr(flag), 0, 0)
+	_, _, e1 := syscall_syscall(libc_setprivexec_trampoline_addr, uintptr(flag), 0, 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_setprivexec_trampoline()
+var libc_setprivexec_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_setprivexec setprivexec "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Setregid(rgid int, egid int) (err error) {
-	_, _, e1 := syscall_rawSyscall(funcPC(libc_setregid_trampoline), uintptr(rgid), uintptr(egid), 0)
+	_, _, e1 := syscall_rawSyscall(libc_setregid_trampoline_addr, uintptr(rgid), uintptr(egid), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_setregid_trampoline()
+var libc_setregid_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_setregid setregid "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Setreuid(ruid int, euid int) (err error) {
-	_, _, e1 := syscall_rawSyscall(funcPC(libc_setreuid_trampoline), uintptr(ruid), uintptr(euid), 0)
+	_, _, e1 := syscall_rawSyscall(libc_setreuid_trampoline_addr, uintptr(ruid), uintptr(euid), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_setreuid_trampoline()
+var libc_setreuid_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_setreuid setreuid "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Setrlimit(which int, lim *Rlimit) (err error) {
-	_, _, e1 := syscall_rawSyscall(funcPC(libc_setrlimit_trampoline), uintptr(which), uintptr(unsafe.Pointer(lim)), 0)
+	_, _, e1 := syscall_rawSyscall(libc_setrlimit_trampoline_addr, uintptr(which), uintptr(unsafe.Pointer(lim)), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_setrlimit_trampoline()
+var libc_setrlimit_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_setrlimit setrlimit "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Setsid() (pid int, err error) {
-	r0, _, e1 := syscall_rawSyscall(funcPC(libc_setsid_trampoline), 0, 0, 0)
+	r0, _, e1 := syscall_rawSyscall(libc_setsid_trampoline_addr, 0, 0, 0)
 	pid = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -2024,35 +2024,35 @@ func Setsid() (pid int, err error) {
 	return
 }
 
-func libc_setsid_trampoline()
+var libc_setsid_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_setsid setsid "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Settimeofday(tp *Timeval) (err error) {
-	_, _, e1 := syscall_rawSyscall(funcPC(libc_settimeofday_trampoline), uintptr(unsafe.Pointer(tp)), 0, 0)
+	_, _, e1 := syscall_rawSyscall(libc_settimeofday_trampoline_addr, uintptr(unsafe.Pointer(tp)), 0, 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_settimeofday_trampoline()
+var libc_settimeofday_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_settimeofday settimeofday "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Setuid(uid int) (err error) {
-	_, _, e1 := syscall_rawSyscall(funcPC(libc_setuid_trampoline), uintptr(uid), 0, 0)
+	_, _, e1 := syscall_rawSyscall(libc_setuid_trampoline_addr, uintptr(uid), 0, 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_setuid_trampoline()
+var libc_setuid_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_setuid setuid "/usr/lib/libSystem.B.dylib"
 
@@ -2069,14 +2069,14 @@ func Symlink(path string, link string) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall(funcPC(libc_symlink_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), 0)
+	_, _, e1 := syscall_syscall(libc_symlink_trampoline_addr, uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_symlink_trampoline()
+var libc_symlink_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_symlink symlink "/usr/lib/libSystem.B.dylib"
 
@@ -2093,28 +2093,28 @@ func Symlinkat(oldpath string, newdirfd int, newpath string) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall(funcPC(libc_symlinkat_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(newdirfd), uintptr(unsafe.Pointer(_p1)))
+	_, _, e1 := syscall_syscall(libc_symlinkat_trampoline_addr, uintptr(unsafe.Pointer(_p0)), uintptr(newdirfd), uintptr(unsafe.Pointer(_p1)))
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_symlinkat_trampoline()
+var libc_symlinkat_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_symlinkat symlinkat "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Sync() (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_sync_trampoline), 0, 0, 0)
+	_, _, e1 := syscall_syscall(libc_sync_trampoline_addr, 0, 0, 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_sync_trampoline()
+var libc_sync_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_sync sync "/usr/lib/libSystem.B.dylib"
 
@@ -2126,26 +2126,26 @@ func Truncate(path string, length int64) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall(funcPC(libc_truncate_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(length), 0)
+	_, _, e1 := syscall_syscall(libc_truncate_trampoline_addr, uintptr(unsafe.Pointer(_p0)), uintptr(length), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_truncate_trampoline()
+var libc_truncate_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_truncate truncate "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Umask(newmask int) (oldmask int) {
-	r0, _, _ := syscall_syscall(funcPC(libc_umask_trampoline), uintptr(newmask), 0, 0)
+	r0, _, _ := syscall_syscall(libc_umask_trampoline_addr, uintptr(newmask), 0, 0)
 	oldmask = int(r0)
 	return
 }
 
-func libc_umask_trampoline()
+var libc_umask_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_umask umask "/usr/lib/libSystem.B.dylib"
 
@@ -2157,14 +2157,14 @@ func Undelete(path string) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall(funcPC(libc_undelete_trampoline), uintptr(unsafe.Pointer(_p0)), 0, 0)
+	_, _, e1 := syscall_syscall(libc_undelete_trampoline_addr, uintptr(unsafe.Pointer(_p0)), 0, 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_undelete_trampoline()
+var libc_undelete_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_undelete undelete "/usr/lib/libSystem.B.dylib"
 
@@ -2176,14 +2176,14 @@ func Unlink(path string) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall(funcPC(libc_unlink_trampoline), uintptr(unsafe.Pointer(_p0)), 0, 0)
+	_, _, e1 := syscall_syscall(libc_unlink_trampoline_addr, uintptr(unsafe.Pointer(_p0)), 0, 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_unlink_trampoline()
+var libc_unlink_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_unlink unlink "/usr/lib/libSystem.B.dylib"
 
@@ -2195,14 +2195,14 @@ func Unlinkat(dirfd int, path string, flags int) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall(funcPC(libc_unlinkat_trampoline), uintptr(dirfd), uintptr(unsafe.Pointer(_p0)), uintptr(flags))
+	_, _, e1 := syscall_syscall(libc_unlinkat_trampoline_addr, uintptr(dirfd), uintptr(unsafe.Pointer(_p0)), uintptr(flags))
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_unlinkat_trampoline()
+var libc_unlinkat_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_unlinkat unlinkat "/usr/lib/libSystem.B.dylib"
 
@@ -2214,14 +2214,14 @@ func Unmount(path string, flags int) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall(funcPC(libc_unmount_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(flags), 0)
+	_, _, e1 := syscall_syscall(libc_unmount_trampoline_addr, uintptr(unsafe.Pointer(_p0)), uintptr(flags), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_unmount_trampoline()
+var libc_unmount_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_unmount unmount "/usr/lib/libSystem.B.dylib"
 
@@ -2234,7 +2234,7 @@ func write(fd int, p []byte) (n int, err error) {
 	} else {
 		_p0 = unsafe.Pointer(&_zero)
 	}
-	r0, _, e1 := syscall_syscall(funcPC(libc_write_trampoline), uintptr(fd), uintptr(_p0), uintptr(len(p)))
+	r0, _, e1 := syscall_syscall(libc_write_trampoline_addr, uintptr(fd), uintptr(_p0), uintptr(len(p)))
 	n = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -2242,14 +2242,14 @@ func write(fd int, p []byte) (n int, err error) {
 	return
 }
 
-func libc_write_trampoline()
+var libc_write_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_write write "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func mmap(addr uintptr, length uintptr, prot int, flag int, fd int, pos int64) (ret uintptr, err error) {
-	r0, _, e1 := syscall_syscall6(funcPC(libc_mmap_trampoline), uintptr(addr), uintptr(length), uintptr(prot), uintptr(flag), uintptr(fd), uintptr(pos))
+	r0, _, e1 := syscall_syscall6(libc_mmap_trampoline_addr, uintptr(addr), uintptr(length), uintptr(prot), uintptr(flag), uintptr(fd), uintptr(pos))
 	ret = uintptr(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -2257,28 +2257,28 @@ func mmap(addr uintptr, length uintptr, prot int, flag int, fd int, pos int64) (
 	return
 }
 
-func libc_mmap_trampoline()
+var libc_mmap_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_mmap mmap "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func munmap(addr uintptr, length uintptr) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_munmap_trampoline), uintptr(addr), uintptr(length), 0)
+	_, _, e1 := syscall_syscall(libc_munmap_trampoline_addr, uintptr(addr), uintptr(length), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_munmap_trampoline()
+var libc_munmap_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_munmap munmap "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func readlen(fd int, buf *byte, nbuf int) (n int, err error) {
-	r0, _, e1 := syscall_syscall(funcPC(libc_read_trampoline), uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf))
+	r0, _, e1 := syscall_syscall(libc_read_trampoline_addr, uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf))
 	n = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -2289,7 +2289,7 @@ func readlen(fd int, buf *byte, nbuf int) (n int, err error) {
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func writelen(fd int, buf *byte, nbuf int) (n int, err error) {
-	r0, _, e1 := syscall_syscall(funcPC(libc_write_trampoline), uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf))
+	r0, _, e1 := syscall_syscall(libc_write_trampoline_addr, uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf))
 	n = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -2300,14 +2300,14 @@ func writelen(fd int, buf *byte, nbuf int) (n int, err error) {
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Fstat(fd int, stat *Stat_t) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_fstat_trampoline), uintptr(fd), uintptr(unsafe.Pointer(stat)), 0)
+	_, _, e1 := syscall_syscall(libc_fstat_trampoline_addr, uintptr(fd), uintptr(unsafe.Pointer(stat)), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_fstat_trampoline()
+var libc_fstat_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_fstat fstat "/usr/lib/libSystem.B.dylib"
 
@@ -2319,35 +2319,35 @@ func Fstatat(fd int, path string, stat *Stat_t, flags int) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall6(funcPC(libc_fstatat_trampoline), uintptr(fd), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(stat)), uintptr(flags), 0, 0)
+	_, _, e1 := syscall_syscall6(libc_fstatat_trampoline_addr, uintptr(fd), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(stat)), uintptr(flags), 0, 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_fstatat_trampoline()
+var libc_fstatat_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_fstatat fstatat "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Fstatfs(fd int, stat *Statfs_t) (err error) {
-	_, _, e1 := syscall_syscall(funcPC(libc_fstatfs_trampoline), uintptr(fd), uintptr(unsafe.Pointer(stat)), 0)
+	_, _, e1 := syscall_syscall(libc_fstatfs_trampoline_addr, uintptr(fd), uintptr(unsafe.Pointer(stat)), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_fstatfs_trampoline()
+var libc_fstatfs_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_fstatfs fstatfs "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func getfsstat(buf unsafe.Pointer, size uintptr, flags int) (n int, err error) {
-	r0, _, e1 := syscall_syscall(funcPC(libc_getfsstat_trampoline), uintptr(buf), uintptr(size), uintptr(flags))
+	r0, _, e1 := syscall_syscall(libc_getfsstat_trampoline_addr, uintptr(buf), uintptr(size), uintptr(flags))
 	n = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -2355,7 +2355,7 @@ func getfsstat(buf unsafe.Pointer, size uintptr, flags int) (n int, err error) {
 	return
 }
 
-func libc_getfsstat_trampoline()
+var libc_getfsstat_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_getfsstat getfsstat "/usr/lib/libSystem.B.dylib"
 
@@ -2367,28 +2367,28 @@ func Lstat(path string, stat *Stat_t) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall(funcPC(libc_lstat_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(stat)), 0)
+	_, _, e1 := syscall_syscall(libc_lstat_trampoline_addr, uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(stat)), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_lstat_trampoline()
+var libc_lstat_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_lstat lstat "/usr/lib/libSystem.B.dylib"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func ptrace1(request int, pid int, addr uintptr, data uintptr) (err error) {
-	_, _, e1 := syscall_syscall6(funcPC(libc_ptrace_trampoline), uintptr(request), uintptr(pid), uintptr(addr), uintptr(data), 0, 0)
+	_, _, e1 := syscall_syscall6(libc_ptrace_trampoline_addr, uintptr(request), uintptr(pid), uintptr(addr), uintptr(data), 0, 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_ptrace_trampoline()
+var libc_ptrace_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_ptrace ptrace "/usr/lib/libSystem.B.dylib"
 
@@ -2400,14 +2400,14 @@ func Stat(path string, stat *Stat_t) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall(funcPC(libc_stat_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(stat)), 0)
+	_, _, e1 := syscall_syscall(libc_stat_trampoline_addr, uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(stat)), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_stat_trampoline()
+var libc_stat_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_stat stat "/usr/lib/libSystem.B.dylib"
 
@@ -2419,13 +2419,13 @@ func Statfs(path string, stat *Statfs_t) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := syscall_syscall(funcPC(libc_statfs_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(stat)), 0)
+	_, _, e1 := syscall_syscall(libc_statfs_trampoline_addr, uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(stat)), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-func libc_statfs_trampoline()
+var libc_statfs_trampoline_addr uintptr
 
 //go:cgo_import_dynamic libc_statfs statfs "/usr/lib/libSystem.B.dylib"
diff --git a/src/cmd/vendor/golang.org/x/sys/unix/zsyscall_darwin_arm64.s b/src/cmd/vendor/golang.org/x/sys/unix/zsyscall_darwin_arm64.s
index e30a697407..33e19776db 100644
--- a/src/cmd/vendor/golang.org/x/sys/unix/zsyscall_darwin_arm64.s
+++ b/src/cmd/vendor/golang.org/x/sys/unix/zsyscall_darwin_arm64.s
@@ -5,287 +5,855 @@
 // +build go1.12
 
 #include "textflag.h"
-TEXT ·libc_getgroups_trampoline(SB),NOSPLIT,$0-0
+
+TEXT libc_getgroups_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_getgroups(SB)
-TEXT ·libc_setgroups_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_getgroups_trampoline_addr(SB), RODATA, $8
+DATA	·libc_getgroups_trampoline_addr(SB)/8, $libc_getgroups_trampoline<>(SB)
+
+TEXT libc_setgroups_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_setgroups(SB)
-TEXT ·libc_wait4_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_setgroups_trampoline_addr(SB), RODATA, $8
+DATA	·libc_setgroups_trampoline_addr(SB)/8, $libc_setgroups_trampoline<>(SB)
+
+TEXT libc_wait4_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_wait4(SB)
-TEXT ·libc_accept_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_wait4_trampoline_addr(SB), RODATA, $8
+DATA	·libc_wait4_trampoline_addr(SB)/8, $libc_wait4_trampoline<>(SB)
+
+TEXT libc_accept_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_accept(SB)
-TEXT ·libc_bind_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_accept_trampoline_addr(SB), RODATA, $8
+DATA	·libc_accept_trampoline_addr(SB)/8, $libc_accept_trampoline<>(SB)
+
+TEXT libc_bind_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_bind(SB)
-TEXT ·libc_connect_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_bind_trampoline_addr(SB), RODATA, $8
+DATA	·libc_bind_trampoline_addr(SB)/8, $libc_bind_trampoline<>(SB)
+
+TEXT libc_connect_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_connect(SB)
-TEXT ·libc_socket_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_connect_trampoline_addr(SB), RODATA, $8
+DATA	·libc_connect_trampoline_addr(SB)/8, $libc_connect_trampoline<>(SB)
+
+TEXT libc_socket_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_socket(SB)
-TEXT ·libc_getsockopt_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_socket_trampoline_addr(SB), RODATA, $8
+DATA	·libc_socket_trampoline_addr(SB)/8, $libc_socket_trampoline<>(SB)
+
+TEXT libc_getsockopt_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_getsockopt(SB)
-TEXT ·libc_setsockopt_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_getsockopt_trampoline_addr(SB), RODATA, $8
+DATA	·libc_getsockopt_trampoline_addr(SB)/8, $libc_getsockopt_trampoline<>(SB)
+
+TEXT libc_setsockopt_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_setsockopt(SB)
-TEXT ·libc_getpeername_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_setsockopt_trampoline_addr(SB), RODATA, $8
+DATA	·libc_setsockopt_trampoline_addr(SB)/8, $libc_setsockopt_trampoline<>(SB)
+
+TEXT libc_getpeername_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_getpeername(SB)
-TEXT ·libc_getsockname_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_getpeername_trampoline_addr(SB), RODATA, $8
+DATA	·libc_getpeername_trampoline_addr(SB)/8, $libc_getpeername_trampoline<>(SB)
+
+TEXT libc_getsockname_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_getsockname(SB)
-TEXT ·libc_shutdown_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_getsockname_trampoline_addr(SB), RODATA, $8
+DATA	·libc_getsockname_trampoline_addr(SB)/8, $libc_getsockname_trampoline<>(SB)
+
+TEXT libc_shutdown_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_shutdown(SB)
-TEXT ·libc_socketpair_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_shutdown_trampoline_addr(SB), RODATA, $8
+DATA	·libc_shutdown_trampoline_addr(SB)/8, $libc_shutdown_trampoline<>(SB)
+
+TEXT libc_socketpair_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_socketpair(SB)
-TEXT ·libc_recvfrom_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_socketpair_trampoline_addr(SB), RODATA, $8
+DATA	·libc_socketpair_trampoline_addr(SB)/8, $libc_socketpair_trampoline<>(SB)
+
+TEXT libc_recvfrom_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_recvfrom(SB)
-TEXT ·libc_sendto_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_recvfrom_trampoline_addr(SB), RODATA, $8
+DATA	·libc_recvfrom_trampoline_addr(SB)/8, $libc_recvfrom_trampoline<>(SB)
+
+TEXT libc_sendto_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_sendto(SB)
-TEXT ·libc_recvmsg_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_sendto_trampoline_addr(SB), RODATA, $8
+DATA	·libc_sendto_trampoline_addr(SB)/8, $libc_sendto_trampoline<>(SB)
+
+TEXT libc_recvmsg_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_recvmsg(SB)
-TEXT ·libc_sendmsg_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_recvmsg_trampoline_addr(SB), RODATA, $8
+DATA	·libc_recvmsg_trampoline_addr(SB)/8, $libc_recvmsg_trampoline<>(SB)
+
+TEXT libc_sendmsg_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_sendmsg(SB)
-TEXT ·libc_kevent_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_sendmsg_trampoline_addr(SB), RODATA, $8
+DATA	·libc_sendmsg_trampoline_addr(SB)/8, $libc_sendmsg_trampoline<>(SB)
+
+TEXT libc_kevent_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_kevent(SB)
-TEXT ·libc_utimes_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_kevent_trampoline_addr(SB), RODATA, $8
+DATA	·libc_kevent_trampoline_addr(SB)/8, $libc_kevent_trampoline<>(SB)
+
+TEXT libc_utimes_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_utimes(SB)
-TEXT ·libc_futimes_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_utimes_trampoline_addr(SB), RODATA, $8
+DATA	·libc_utimes_trampoline_addr(SB)/8, $libc_utimes_trampoline<>(SB)
+
+TEXT libc_futimes_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_futimes(SB)
-TEXT ·libc_poll_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_futimes_trampoline_addr(SB), RODATA, $8
+DATA	·libc_futimes_trampoline_addr(SB)/8, $libc_futimes_trampoline<>(SB)
+
+TEXT libc_poll_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_poll(SB)
-TEXT ·libc_madvise_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_poll_trampoline_addr(SB), RODATA, $8
+DATA	·libc_poll_trampoline_addr(SB)/8, $libc_poll_trampoline<>(SB)
+
+TEXT libc_madvise_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_madvise(SB)
-TEXT ·libc_mlock_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_madvise_trampoline_addr(SB), RODATA, $8
+DATA	·libc_madvise_trampoline_addr(SB)/8, $libc_madvise_trampoline<>(SB)
+
+TEXT libc_mlock_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_mlock(SB)
-TEXT ·libc_mlockall_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_mlock_trampoline_addr(SB), RODATA, $8
+DATA	·libc_mlock_trampoline_addr(SB)/8, $libc_mlock_trampoline<>(SB)
+
+TEXT libc_mlockall_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_mlockall(SB)
-TEXT ·libc_mprotect_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_mlockall_trampoline_addr(SB), RODATA, $8
+DATA	·libc_mlockall_trampoline_addr(SB)/8, $libc_mlockall_trampoline<>(SB)
+
+TEXT libc_mprotect_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_mprotect(SB)
-TEXT ·libc_msync_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_mprotect_trampoline_addr(SB), RODATA, $8
+DATA	·libc_mprotect_trampoline_addr(SB)/8, $libc_mprotect_trampoline<>(SB)
+
+TEXT libc_msync_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_msync(SB)
-TEXT ·libc_munlock_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_msync_trampoline_addr(SB), RODATA, $8
+DATA	·libc_msync_trampoline_addr(SB)/8, $libc_msync_trampoline<>(SB)
+
+TEXT libc_munlock_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_munlock(SB)
-TEXT ·libc_munlockall_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_munlock_trampoline_addr(SB), RODATA, $8
+DATA	·libc_munlock_trampoline_addr(SB)/8, $libc_munlock_trampoline<>(SB)
+
+TEXT libc_munlockall_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_munlockall(SB)
-TEXT ·libc_pipe_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_munlockall_trampoline_addr(SB), RODATA, $8
+DATA	·libc_munlockall_trampoline_addr(SB)/8, $libc_munlockall_trampoline<>(SB)
+
+TEXT libc_pipe_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_pipe(SB)
-TEXT ·libc_getxattr_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_pipe_trampoline_addr(SB), RODATA, $8
+DATA	·libc_pipe_trampoline_addr(SB)/8, $libc_pipe_trampoline<>(SB)
+
+TEXT libc_getxattr_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_getxattr(SB)
-TEXT ·libc_fgetxattr_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_getxattr_trampoline_addr(SB), RODATA, $8
+DATA	·libc_getxattr_trampoline_addr(SB)/8, $libc_getxattr_trampoline<>(SB)
+
+TEXT libc_fgetxattr_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_fgetxattr(SB)
-TEXT ·libc_setxattr_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_fgetxattr_trampoline_addr(SB), RODATA, $8
+DATA	·libc_fgetxattr_trampoline_addr(SB)/8, $libc_fgetxattr_trampoline<>(SB)
+
+TEXT libc_setxattr_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_setxattr(SB)
-TEXT ·libc_fsetxattr_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_setxattr_trampoline_addr(SB), RODATA, $8
+DATA	·libc_setxattr_trampoline_addr(SB)/8, $libc_setxattr_trampoline<>(SB)
+
+TEXT libc_fsetxattr_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_fsetxattr(SB)
-TEXT ·libc_removexattr_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_fsetxattr_trampoline_addr(SB), RODATA, $8
+DATA	·libc_fsetxattr_trampoline_addr(SB)/8, $libc_fsetxattr_trampoline<>(SB)
+
+TEXT libc_removexattr_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_removexattr(SB)
-TEXT ·libc_fremovexattr_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_removexattr_trampoline_addr(SB), RODATA, $8
+DATA	·libc_removexattr_trampoline_addr(SB)/8, $libc_removexattr_trampoline<>(SB)
+
+TEXT libc_fremovexattr_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_fremovexattr(SB)
-TEXT ·libc_listxattr_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_fremovexattr_trampoline_addr(SB), RODATA, $8
+DATA	·libc_fremovexattr_trampoline_addr(SB)/8, $libc_fremovexattr_trampoline<>(SB)
+
+TEXT libc_listxattr_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_listxattr(SB)
-TEXT ·libc_flistxattr_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_listxattr_trampoline_addr(SB), RODATA, $8
+DATA	·libc_listxattr_trampoline_addr(SB)/8, $libc_listxattr_trampoline<>(SB)
+
+TEXT libc_flistxattr_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_flistxattr(SB)
-TEXT ·libc_setattrlist_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_flistxattr_trampoline_addr(SB), RODATA, $8
+DATA	·libc_flistxattr_trampoline_addr(SB)/8, $libc_flistxattr_trampoline<>(SB)
+
+TEXT libc_setattrlist_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_setattrlist(SB)
-TEXT ·libc_fcntl_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_setattrlist_trampoline_addr(SB), RODATA, $8
+DATA	·libc_setattrlist_trampoline_addr(SB)/8, $libc_setattrlist_trampoline<>(SB)
+
+TEXT libc_fcntl_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_fcntl(SB)
-TEXT ·libc_kill_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_fcntl_trampoline_addr(SB), RODATA, $8
+DATA	·libc_fcntl_trampoline_addr(SB)/8, $libc_fcntl_trampoline<>(SB)
+
+TEXT libc_kill_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_kill(SB)
-TEXT ·libc_ioctl_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_kill_trampoline_addr(SB), RODATA, $8
+DATA	·libc_kill_trampoline_addr(SB)/8, $libc_kill_trampoline<>(SB)
+
+TEXT libc_ioctl_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_ioctl(SB)
-TEXT ·libc_sysctl_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_ioctl_trampoline_addr(SB), RODATA, $8
+DATA	·libc_ioctl_trampoline_addr(SB)/8, $libc_ioctl_trampoline<>(SB)
+
+TEXT libc_sysctl_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_sysctl(SB)
-TEXT ·libc_sendfile_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_sysctl_trampoline_addr(SB), RODATA, $8
+DATA	·libc_sysctl_trampoline_addr(SB)/8, $libc_sysctl_trampoline<>(SB)
+
+TEXT libc_sendfile_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_sendfile(SB)
-TEXT ·libc_access_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_sendfile_trampoline_addr(SB), RODATA, $8
+DATA	·libc_sendfile_trampoline_addr(SB)/8, $libc_sendfile_trampoline<>(SB)
+
+TEXT libc_access_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_access(SB)
-TEXT ·libc_adjtime_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_access_trampoline_addr(SB), RODATA, $8
+DATA	·libc_access_trampoline_addr(SB)/8, $libc_access_trampoline<>(SB)
+
+TEXT libc_adjtime_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_adjtime(SB)
-TEXT ·libc_chdir_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_adjtime_trampoline_addr(SB), RODATA, $8
+DATA	·libc_adjtime_trampoline_addr(SB)/8, $libc_adjtime_trampoline<>(SB)
+
+TEXT libc_chdir_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_chdir(SB)
-TEXT ·libc_chflags_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_chdir_trampoline_addr(SB), RODATA, $8
+DATA	·libc_chdir_trampoline_addr(SB)/8, $libc_chdir_trampoline<>(SB)
+
+TEXT libc_chflags_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_chflags(SB)
-TEXT ·libc_chmod_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_chflags_trampoline_addr(SB), RODATA, $8
+DATA	·libc_chflags_trampoline_addr(SB)/8, $libc_chflags_trampoline<>(SB)
+
+TEXT libc_chmod_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_chmod(SB)
-TEXT ·libc_chown_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_chmod_trampoline_addr(SB), RODATA, $8
+DATA	·libc_chmod_trampoline_addr(SB)/8, $libc_chmod_trampoline<>(SB)
+
+TEXT libc_chown_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_chown(SB)
-TEXT ·libc_chroot_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_chown_trampoline_addr(SB), RODATA, $8
+DATA	·libc_chown_trampoline_addr(SB)/8, $libc_chown_trampoline<>(SB)
+
+TEXT libc_chroot_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_chroot(SB)
-TEXT ·libc_clock_gettime_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_chroot_trampoline_addr(SB), RODATA, $8
+DATA	·libc_chroot_trampoline_addr(SB)/8, $libc_chroot_trampoline<>(SB)
+
+TEXT libc_clock_gettime_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_clock_gettime(SB)
-TEXT ·libc_close_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_clock_gettime_trampoline_addr(SB), RODATA, $8
+DATA	·libc_clock_gettime_trampoline_addr(SB)/8, $libc_clock_gettime_trampoline<>(SB)
+
+TEXT libc_close_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_close(SB)
-TEXT ·libc_clonefile_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_close_trampoline_addr(SB), RODATA, $8
+DATA	·libc_close_trampoline_addr(SB)/8, $libc_close_trampoline<>(SB)
+
+TEXT libc_clonefile_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_clonefile(SB)
-TEXT ·libc_clonefileat_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_clonefile_trampoline_addr(SB), RODATA, $8
+DATA	·libc_clonefile_trampoline_addr(SB)/8, $libc_clonefile_trampoline<>(SB)
+
+TEXT libc_clonefileat_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_clonefileat(SB)
-TEXT ·libc_dup_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_clonefileat_trampoline_addr(SB), RODATA, $8
+DATA	·libc_clonefileat_trampoline_addr(SB)/8, $libc_clonefileat_trampoline<>(SB)
+
+TEXT libc_dup_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_dup(SB)
-TEXT ·libc_dup2_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_dup_trampoline_addr(SB), RODATA, $8
+DATA	·libc_dup_trampoline_addr(SB)/8, $libc_dup_trampoline<>(SB)
+
+TEXT libc_dup2_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_dup2(SB)
-TEXT ·libc_exchangedata_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_dup2_trampoline_addr(SB), RODATA, $8
+DATA	·libc_dup2_trampoline_addr(SB)/8, $libc_dup2_trampoline<>(SB)
+
+TEXT libc_exchangedata_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_exchangedata(SB)
-TEXT ·libc_exit_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_exchangedata_trampoline_addr(SB), RODATA, $8
+DATA	·libc_exchangedata_trampoline_addr(SB)/8, $libc_exchangedata_trampoline<>(SB)
+
+TEXT libc_exit_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_exit(SB)
-TEXT ·libc_faccessat_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_exit_trampoline_addr(SB), RODATA, $8
+DATA	·libc_exit_trampoline_addr(SB)/8, $libc_exit_trampoline<>(SB)
+
+TEXT libc_faccessat_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_faccessat(SB)
-TEXT ·libc_fchdir_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_faccessat_trampoline_addr(SB), RODATA, $8
+DATA	·libc_faccessat_trampoline_addr(SB)/8, $libc_faccessat_trampoline<>(SB)
+
+TEXT libc_fchdir_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_fchdir(SB)
-TEXT ·libc_fchflags_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_fchdir_trampoline_addr(SB), RODATA, $8
+DATA	·libc_fchdir_trampoline_addr(SB)/8, $libc_fchdir_trampoline<>(SB)
+
+TEXT libc_fchflags_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_fchflags(SB)
-TEXT ·libc_fchmod_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_fchflags_trampoline_addr(SB), RODATA, $8
+DATA	·libc_fchflags_trampoline_addr(SB)/8, $libc_fchflags_trampoline<>(SB)
+
+TEXT libc_fchmod_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_fchmod(SB)
-TEXT ·libc_fchmodat_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_fchmod_trampoline_addr(SB), RODATA, $8
+DATA	·libc_fchmod_trampoline_addr(SB)/8, $libc_fchmod_trampoline<>(SB)
+
+TEXT libc_fchmodat_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_fchmodat(SB)
-TEXT ·libc_fchown_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_fchmodat_trampoline_addr(SB), RODATA, $8
+DATA	·libc_fchmodat_trampoline_addr(SB)/8, $libc_fchmodat_trampoline<>(SB)
+
+TEXT libc_fchown_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_fchown(SB)
-TEXT ·libc_fchownat_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_fchown_trampoline_addr(SB), RODATA, $8
+DATA	·libc_fchown_trampoline_addr(SB)/8, $libc_fchown_trampoline<>(SB)
+
+TEXT libc_fchownat_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_fchownat(SB)
-TEXT ·libc_fclonefileat_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_fchownat_trampoline_addr(SB), RODATA, $8
+DATA	·libc_fchownat_trampoline_addr(SB)/8, $libc_fchownat_trampoline<>(SB)
+
+TEXT libc_fclonefileat_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_fclonefileat(SB)
-TEXT ·libc_flock_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_fclonefileat_trampoline_addr(SB), RODATA, $8
+DATA	·libc_fclonefileat_trampoline_addr(SB)/8, $libc_fclonefileat_trampoline<>(SB)
+
+TEXT libc_flock_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_flock(SB)
-TEXT ·libc_fpathconf_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_flock_trampoline_addr(SB), RODATA, $8
+DATA	·libc_flock_trampoline_addr(SB)/8, $libc_flock_trampoline<>(SB)
+
+TEXT libc_fpathconf_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_fpathconf(SB)
-TEXT ·libc_fsync_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_fpathconf_trampoline_addr(SB), RODATA, $8
+DATA	·libc_fpathconf_trampoline_addr(SB)/8, $libc_fpathconf_trampoline<>(SB)
+
+TEXT libc_fsync_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_fsync(SB)
-TEXT ·libc_ftruncate_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_fsync_trampoline_addr(SB), RODATA, $8
+DATA	·libc_fsync_trampoline_addr(SB)/8, $libc_fsync_trampoline<>(SB)
+
+TEXT libc_ftruncate_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_ftruncate(SB)
-TEXT ·libc_getcwd_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_ftruncate_trampoline_addr(SB), RODATA, $8
+DATA	·libc_ftruncate_trampoline_addr(SB)/8, $libc_ftruncate_trampoline<>(SB)
+
+TEXT libc_getcwd_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_getcwd(SB)
-TEXT ·libc_getdtablesize_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_getcwd_trampoline_addr(SB), RODATA, $8
+DATA	·libc_getcwd_trampoline_addr(SB)/8, $libc_getcwd_trampoline<>(SB)
+
+TEXT libc_getdtablesize_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_getdtablesize(SB)
-TEXT ·libc_getegid_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_getdtablesize_trampoline_addr(SB), RODATA, $8
+DATA	·libc_getdtablesize_trampoline_addr(SB)/8, $libc_getdtablesize_trampoline<>(SB)
+
+TEXT libc_getegid_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_getegid(SB)
-TEXT ·libc_geteuid_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_getegid_trampoline_addr(SB), RODATA, $8
+DATA	·libc_getegid_trampoline_addr(SB)/8, $libc_getegid_trampoline<>(SB)
+
+TEXT libc_geteuid_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_geteuid(SB)
-TEXT ·libc_getgid_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_geteuid_trampoline_addr(SB), RODATA, $8
+DATA	·libc_geteuid_trampoline_addr(SB)/8, $libc_geteuid_trampoline<>(SB)
+
+TEXT libc_getgid_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_getgid(SB)
-TEXT ·libc_getpgid_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_getgid_trampoline_addr(SB), RODATA, $8
+DATA	·libc_getgid_trampoline_addr(SB)/8, $libc_getgid_trampoline<>(SB)
+
+TEXT libc_getpgid_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_getpgid(SB)
-TEXT ·libc_getpgrp_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_getpgid_trampoline_addr(SB), RODATA, $8
+DATA	·libc_getpgid_trampoline_addr(SB)/8, $libc_getpgid_trampoline<>(SB)
+
+TEXT libc_getpgrp_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_getpgrp(SB)
-TEXT ·libc_getpid_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_getpgrp_trampoline_addr(SB), RODATA, $8
+DATA	·libc_getpgrp_trampoline_addr(SB)/8, $libc_getpgrp_trampoline<>(SB)
+
+TEXT libc_getpid_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_getpid(SB)
-TEXT ·libc_getppid_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_getpid_trampoline_addr(SB), RODATA, $8
+DATA	·libc_getpid_trampoline_addr(SB)/8, $libc_getpid_trampoline<>(SB)
+
+TEXT libc_getppid_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_getppid(SB)
-TEXT ·libc_getpriority_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_getppid_trampoline_addr(SB), RODATA, $8
+DATA	·libc_getppid_trampoline_addr(SB)/8, $libc_getppid_trampoline<>(SB)
+
+TEXT libc_getpriority_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_getpriority(SB)
-TEXT ·libc_getrlimit_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_getpriority_trampoline_addr(SB), RODATA, $8
+DATA	·libc_getpriority_trampoline_addr(SB)/8, $libc_getpriority_trampoline<>(SB)
+
+TEXT libc_getrlimit_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_getrlimit(SB)
-TEXT ·libc_getrusage_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_getrlimit_trampoline_addr(SB), RODATA, $8
+DATA	·libc_getrlimit_trampoline_addr(SB)/8, $libc_getrlimit_trampoline<>(SB)
+
+TEXT libc_getrusage_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_getrusage(SB)
-TEXT ·libc_getsid_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_getrusage_trampoline_addr(SB), RODATA, $8
+DATA	·libc_getrusage_trampoline_addr(SB)/8, $libc_getrusage_trampoline<>(SB)
+
+TEXT libc_getsid_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_getsid(SB)
-TEXT ·libc_gettimeofday_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_getsid_trampoline_addr(SB), RODATA, $8
+DATA	·libc_getsid_trampoline_addr(SB)/8, $libc_getsid_trampoline<>(SB)
+
+TEXT libc_gettimeofday_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_gettimeofday(SB)
-TEXT ·libc_getuid_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_gettimeofday_trampoline_addr(SB), RODATA, $8
+DATA	·libc_gettimeofday_trampoline_addr(SB)/8, $libc_gettimeofday_trampoline<>(SB)
+
+TEXT libc_getuid_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_getuid(SB)
-TEXT ·libc_issetugid_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_getuid_trampoline_addr(SB), RODATA, $8
+DATA	·libc_getuid_trampoline_addr(SB)/8, $libc_getuid_trampoline<>(SB)
+
+TEXT libc_issetugid_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_issetugid(SB)
-TEXT ·libc_kqueue_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_issetugid_trampoline_addr(SB), RODATA, $8
+DATA	·libc_issetugid_trampoline_addr(SB)/8, $libc_issetugid_trampoline<>(SB)
+
+TEXT libc_kqueue_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_kqueue(SB)
-TEXT ·libc_lchown_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_kqueue_trampoline_addr(SB), RODATA, $8
+DATA	·libc_kqueue_trampoline_addr(SB)/8, $libc_kqueue_trampoline<>(SB)
+
+TEXT libc_lchown_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_lchown(SB)
-TEXT ·libc_link_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_lchown_trampoline_addr(SB), RODATA, $8
+DATA	·libc_lchown_trampoline_addr(SB)/8, $libc_lchown_trampoline<>(SB)
+
+TEXT libc_link_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_link(SB)
-TEXT ·libc_linkat_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_link_trampoline_addr(SB), RODATA, $8
+DATA	·libc_link_trampoline_addr(SB)/8, $libc_link_trampoline<>(SB)
+
+TEXT libc_linkat_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_linkat(SB)
-TEXT ·libc_listen_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_linkat_trampoline_addr(SB), RODATA, $8
+DATA	·libc_linkat_trampoline_addr(SB)/8, $libc_linkat_trampoline<>(SB)
+
+TEXT libc_listen_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_listen(SB)
-TEXT ·libc_mkdir_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_listen_trampoline_addr(SB), RODATA, $8
+DATA	·libc_listen_trampoline_addr(SB)/8, $libc_listen_trampoline<>(SB)
+
+TEXT libc_mkdir_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_mkdir(SB)
-TEXT ·libc_mkdirat_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_mkdir_trampoline_addr(SB), RODATA, $8
+DATA	·libc_mkdir_trampoline_addr(SB)/8, $libc_mkdir_trampoline<>(SB)
+
+TEXT libc_mkdirat_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_mkdirat(SB)
-TEXT ·libc_mkfifo_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_mkdirat_trampoline_addr(SB), RODATA, $8
+DATA	·libc_mkdirat_trampoline_addr(SB)/8, $libc_mkdirat_trampoline<>(SB)
+
+TEXT libc_mkfifo_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_mkfifo(SB)
-TEXT ·libc_mknod_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_mkfifo_trampoline_addr(SB), RODATA, $8
+DATA	·libc_mkfifo_trampoline_addr(SB)/8, $libc_mkfifo_trampoline<>(SB)
+
+TEXT libc_mknod_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_mknod(SB)
-TEXT ·libc_open_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_mknod_trampoline_addr(SB), RODATA, $8
+DATA	·libc_mknod_trampoline_addr(SB)/8, $libc_mknod_trampoline<>(SB)
+
+TEXT libc_open_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_open(SB)
-TEXT ·libc_openat_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_open_trampoline_addr(SB), RODATA, $8
+DATA	·libc_open_trampoline_addr(SB)/8, $libc_open_trampoline<>(SB)
+
+TEXT libc_openat_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_openat(SB)
-TEXT ·libc_pathconf_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_openat_trampoline_addr(SB), RODATA, $8
+DATA	·libc_openat_trampoline_addr(SB)/8, $libc_openat_trampoline<>(SB)
+
+TEXT libc_pathconf_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_pathconf(SB)
-TEXT ·libc_pread_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_pathconf_trampoline_addr(SB), RODATA, $8
+DATA	·libc_pathconf_trampoline_addr(SB)/8, $libc_pathconf_trampoline<>(SB)
+
+TEXT libc_pread_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_pread(SB)
-TEXT ·libc_pwrite_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_pread_trampoline_addr(SB), RODATA, $8
+DATA	·libc_pread_trampoline_addr(SB)/8, $libc_pread_trampoline<>(SB)
+
+TEXT libc_pwrite_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_pwrite(SB)
-TEXT ·libc_read_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_pwrite_trampoline_addr(SB), RODATA, $8
+DATA	·libc_pwrite_trampoline_addr(SB)/8, $libc_pwrite_trampoline<>(SB)
+
+TEXT libc_read_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_read(SB)
-TEXT ·libc_readlink_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_read_trampoline_addr(SB), RODATA, $8
+DATA	·libc_read_trampoline_addr(SB)/8, $libc_read_trampoline<>(SB)
+
+TEXT libc_readlink_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_readlink(SB)
-TEXT ·libc_readlinkat_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_readlink_trampoline_addr(SB), RODATA, $8
+DATA	·libc_readlink_trampoline_addr(SB)/8, $libc_readlink_trampoline<>(SB)
+
+TEXT libc_readlinkat_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_readlinkat(SB)
-TEXT ·libc_rename_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_readlinkat_trampoline_addr(SB), RODATA, $8
+DATA	·libc_readlinkat_trampoline_addr(SB)/8, $libc_readlinkat_trampoline<>(SB)
+
+TEXT libc_rename_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_rename(SB)
-TEXT ·libc_renameat_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_rename_trampoline_addr(SB), RODATA, $8
+DATA	·libc_rename_trampoline_addr(SB)/8, $libc_rename_trampoline<>(SB)
+
+TEXT libc_renameat_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_renameat(SB)
-TEXT ·libc_revoke_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_renameat_trampoline_addr(SB), RODATA, $8
+DATA	·libc_renameat_trampoline_addr(SB)/8, $libc_renameat_trampoline<>(SB)
+
+TEXT libc_revoke_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_revoke(SB)
-TEXT ·libc_rmdir_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_revoke_trampoline_addr(SB), RODATA, $8
+DATA	·libc_revoke_trampoline_addr(SB)/8, $libc_revoke_trampoline<>(SB)
+
+TEXT libc_rmdir_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_rmdir(SB)
-TEXT ·libc_lseek_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_rmdir_trampoline_addr(SB), RODATA, $8
+DATA	·libc_rmdir_trampoline_addr(SB)/8, $libc_rmdir_trampoline<>(SB)
+
+TEXT libc_lseek_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_lseek(SB)
-TEXT ·libc_select_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_lseek_trampoline_addr(SB), RODATA, $8
+DATA	·libc_lseek_trampoline_addr(SB)/8, $libc_lseek_trampoline<>(SB)
+
+TEXT libc_select_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_select(SB)
-TEXT ·libc_setegid_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_select_trampoline_addr(SB), RODATA, $8
+DATA	·libc_select_trampoline_addr(SB)/8, $libc_select_trampoline<>(SB)
+
+TEXT libc_setegid_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_setegid(SB)
-TEXT ·libc_seteuid_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_setegid_trampoline_addr(SB), RODATA, $8
+DATA	·libc_setegid_trampoline_addr(SB)/8, $libc_setegid_trampoline<>(SB)
+
+TEXT libc_seteuid_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_seteuid(SB)
-TEXT ·libc_setgid_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_seteuid_trampoline_addr(SB), RODATA, $8
+DATA	·libc_seteuid_trampoline_addr(SB)/8, $libc_seteuid_trampoline<>(SB)
+
+TEXT libc_setgid_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_setgid(SB)
-TEXT ·libc_setlogin_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_setgid_trampoline_addr(SB), RODATA, $8
+DATA	·libc_setgid_trampoline_addr(SB)/8, $libc_setgid_trampoline<>(SB)
+
+TEXT libc_setlogin_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_setlogin(SB)
-TEXT ·libc_setpgid_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_setlogin_trampoline_addr(SB), RODATA, $8
+DATA	·libc_setlogin_trampoline_addr(SB)/8, $libc_setlogin_trampoline<>(SB)
+
+TEXT libc_setpgid_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_setpgid(SB)
-TEXT ·libc_setpriority_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_setpgid_trampoline_addr(SB), RODATA, $8
+DATA	·libc_setpgid_trampoline_addr(SB)/8, $libc_setpgid_trampoline<>(SB)
+
+TEXT libc_setpriority_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_setpriority(SB)
-TEXT ·libc_setprivexec_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_setpriority_trampoline_addr(SB), RODATA, $8
+DATA	·libc_setpriority_trampoline_addr(SB)/8, $libc_setpriority_trampoline<>(SB)
+
+TEXT libc_setprivexec_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_setprivexec(SB)
-TEXT ·libc_setregid_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_setprivexec_trampoline_addr(SB), RODATA, $8
+DATA	·libc_setprivexec_trampoline_addr(SB)/8, $libc_setprivexec_trampoline<>(SB)
+
+TEXT libc_setregid_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_setregid(SB)
-TEXT ·libc_setreuid_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_setregid_trampoline_addr(SB), RODATA, $8
+DATA	·libc_setregid_trampoline_addr(SB)/8, $libc_setregid_trampoline<>(SB)
+
+TEXT libc_setreuid_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_setreuid(SB)
-TEXT ·libc_setrlimit_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_setreuid_trampoline_addr(SB), RODATA, $8
+DATA	·libc_setreuid_trampoline_addr(SB)/8, $libc_setreuid_trampoline<>(SB)
+
+TEXT libc_setrlimit_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_setrlimit(SB)
-TEXT ·libc_setsid_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_setrlimit_trampoline_addr(SB), RODATA, $8
+DATA	·libc_setrlimit_trampoline_addr(SB)/8, $libc_setrlimit_trampoline<>(SB)
+
+TEXT libc_setsid_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_setsid(SB)
-TEXT ·libc_settimeofday_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_setsid_trampoline_addr(SB), RODATA, $8
+DATA	·libc_setsid_trampoline_addr(SB)/8, $libc_setsid_trampoline<>(SB)
+
+TEXT libc_settimeofday_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_settimeofday(SB)
-TEXT ·libc_setuid_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_settimeofday_trampoline_addr(SB), RODATA, $8
+DATA	·libc_settimeofday_trampoline_addr(SB)/8, $libc_settimeofday_trampoline<>(SB)
+
+TEXT libc_setuid_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_setuid(SB)
-TEXT ·libc_symlink_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_setuid_trampoline_addr(SB), RODATA, $8
+DATA	·libc_setuid_trampoline_addr(SB)/8, $libc_setuid_trampoline<>(SB)
+
+TEXT libc_symlink_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_symlink(SB)
-TEXT ·libc_symlinkat_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_symlink_trampoline_addr(SB), RODATA, $8
+DATA	·libc_symlink_trampoline_addr(SB)/8, $libc_symlink_trampoline<>(SB)
+
+TEXT libc_symlinkat_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_symlinkat(SB)
-TEXT ·libc_sync_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_symlinkat_trampoline_addr(SB), RODATA, $8
+DATA	·libc_symlinkat_trampoline_addr(SB)/8, $libc_symlinkat_trampoline<>(SB)
+
+TEXT libc_sync_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_sync(SB)
-TEXT ·libc_truncate_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_sync_trampoline_addr(SB), RODATA, $8
+DATA	·libc_sync_trampoline_addr(SB)/8, $libc_sync_trampoline<>(SB)
+
+TEXT libc_truncate_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_truncate(SB)
-TEXT ·libc_umask_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_truncate_trampoline_addr(SB), RODATA, $8
+DATA	·libc_truncate_trampoline_addr(SB)/8, $libc_truncate_trampoline<>(SB)
+
+TEXT libc_umask_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_umask(SB)
-TEXT ·libc_undelete_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_umask_trampoline_addr(SB), RODATA, $8
+DATA	·libc_umask_trampoline_addr(SB)/8, $libc_umask_trampoline<>(SB)
+
+TEXT libc_undelete_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_undelete(SB)
-TEXT ·libc_unlink_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_undelete_trampoline_addr(SB), RODATA, $8
+DATA	·libc_undelete_trampoline_addr(SB)/8, $libc_undelete_trampoline<>(SB)
+
+TEXT libc_unlink_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_unlink(SB)
-TEXT ·libc_unlinkat_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_unlink_trampoline_addr(SB), RODATA, $8
+DATA	·libc_unlink_trampoline_addr(SB)/8, $libc_unlink_trampoline<>(SB)
+
+TEXT libc_unlinkat_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_unlinkat(SB)
-TEXT ·libc_unmount_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_unlinkat_trampoline_addr(SB), RODATA, $8
+DATA	·libc_unlinkat_trampoline_addr(SB)/8, $libc_unlinkat_trampoline<>(SB)
+
+TEXT libc_unmount_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_unmount(SB)
-TEXT ·libc_write_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_unmount_trampoline_addr(SB), RODATA, $8
+DATA	·libc_unmount_trampoline_addr(SB)/8, $libc_unmount_trampoline<>(SB)
+
+TEXT libc_write_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_write(SB)
-TEXT ·libc_mmap_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_write_trampoline_addr(SB), RODATA, $8
+DATA	·libc_write_trampoline_addr(SB)/8, $libc_write_trampoline<>(SB)
+
+TEXT libc_mmap_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_mmap(SB)
-TEXT ·libc_munmap_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_mmap_trampoline_addr(SB), RODATA, $8
+DATA	·libc_mmap_trampoline_addr(SB)/8, $libc_mmap_trampoline<>(SB)
+
+TEXT libc_munmap_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_munmap(SB)
-TEXT ·libc_fstat_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_munmap_trampoline_addr(SB), RODATA, $8
+DATA	·libc_munmap_trampoline_addr(SB)/8, $libc_munmap_trampoline<>(SB)
+
+TEXT libc_fstat_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_fstat(SB)
-TEXT ·libc_fstatat_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_fstat_trampoline_addr(SB), RODATA, $8
+DATA	·libc_fstat_trampoline_addr(SB)/8, $libc_fstat_trampoline<>(SB)
+
+TEXT libc_fstatat_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_fstatat(SB)
-TEXT ·libc_fstatfs_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_fstatat_trampoline_addr(SB), RODATA, $8
+DATA	·libc_fstatat_trampoline_addr(SB)/8, $libc_fstatat_trampoline<>(SB)
+
+TEXT libc_fstatfs_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_fstatfs(SB)
-TEXT ·libc_getfsstat_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_fstatfs_trampoline_addr(SB), RODATA, $8
+DATA	·libc_fstatfs_trampoline_addr(SB)/8, $libc_fstatfs_trampoline<>(SB)
+
+TEXT libc_getfsstat_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_getfsstat(SB)
-TEXT ·libc_lstat_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_getfsstat_trampoline_addr(SB), RODATA, $8
+DATA	·libc_getfsstat_trampoline_addr(SB)/8, $libc_getfsstat_trampoline<>(SB)
+
+TEXT libc_lstat_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_lstat(SB)
-TEXT ·libc_ptrace_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_lstat_trampoline_addr(SB), RODATA, $8
+DATA	·libc_lstat_trampoline_addr(SB)/8, $libc_lstat_trampoline<>(SB)
+
+TEXT libc_ptrace_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_ptrace(SB)
-TEXT ·libc_stat_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_ptrace_trampoline_addr(SB), RODATA, $8
+DATA	·libc_ptrace_trampoline_addr(SB)/8, $libc_ptrace_trampoline<>(SB)
+
+TEXT libc_stat_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_stat(SB)
-TEXT ·libc_statfs_trampoline(SB),NOSPLIT,$0-0
+
+GLOBL	·libc_stat_trampoline_addr(SB), RODATA, $8
+DATA	·libc_stat_trampoline_addr(SB)/8, $libc_stat_trampoline<>(SB)
+
+TEXT libc_statfs_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_statfs(SB)
+
+GLOBL	·libc_statfs_trampoline_addr(SB), RODATA, $8
+DATA	·libc_statfs_trampoline_addr(SB)/8, $libc_statfs_trampoline<>(SB)
diff --git a/src/cmd/vendor/golang.org/x/sys/unix/zsysnum_darwin_386.go b/src/cmd/vendor/golang.org/x/sys/unix/zsysnum_darwin_386.go
deleted file mode 100644
index 1794ffc924..0000000000
--- a/src/cmd/vendor/golang.org/x/sys/unix/zsysnum_darwin_386.go
+++ /dev/null
@@ -1,438 +0,0 @@
-// go run mksysnum.go /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.13.sdk/usr/include/sys/syscall.h
-// Code generated by the command above; see README.md. DO NOT EDIT.
-
-//go:build 386 && darwin
-// +build 386,darwin
-
-package unix
-
-// Deprecated: Use libSystem wrappers instead of direct syscalls.
-const (
-	SYS_SYSCALL                        = 0
-	SYS_EXIT                           = 1
-	SYS_FORK                           = 2
-	SYS_READ                           = 3
-	SYS_WRITE                          = 4
-	SYS_OPEN                           = 5
-	SYS_CLOSE                          = 6
-	SYS_WAIT4                          = 7
-	SYS_LINK                           = 9
-	SYS_UNLINK                         = 10
-	SYS_CHDIR                          = 12
-	SYS_FCHDIR                         = 13
-	SYS_MKNOD                          = 14
-	SYS_CHMOD                          = 15
-	SYS_CHOWN                          = 16
-	SYS_GETFSSTAT                      = 18
-	SYS_GETPID                         = 20
-	SYS_SETUID                         = 23
-	SYS_GETUID                         = 24
-	SYS_GETEUID                        = 25
-	SYS_PTRACE                         = 26
-	SYS_RECVMSG                        = 27
-	SYS_SENDMSG                        = 28
-	SYS_RECVFROM                       = 29
-	SYS_ACCEPT                         = 30
-	SYS_GETPEERNAME                    = 31
-	SYS_GETSOCKNAME                    = 32
-	SYS_ACCESS                         = 33
-	SYS_CHFLAGS                        = 34
-	SYS_FCHFLAGS                       = 35
-	SYS_SYNC                           = 36
-	SYS_KILL                           = 37
-	SYS_GETPPID                        = 39
-	SYS_DUP                            = 41
-	SYS_PIPE                           = 42
-	SYS_GETEGID                        = 43
-	SYS_SIGACTION                      = 46
-	SYS_GETGID                         = 47
-	SYS_SIGPROCMASK                    = 48
-	SYS_GETLOGIN                       = 49
-	SYS_SETLOGIN                       = 50
-	SYS_ACCT                           = 51
-	SYS_SIGPENDING                     = 52
-	SYS_SIGALTSTACK                    = 53
-	SYS_IOCTL                          = 54
-	SYS_REBOOT                         = 55
-	SYS_REVOKE                         = 56
-	SYS_SYMLINK                        = 57
-	SYS_READLINK                       = 58
-	SYS_EXECVE                         = 59
-	SYS_UMASK                          = 60
-	SYS_CHROOT                         = 61
-	SYS_MSYNC                          = 65
-	SYS_VFORK                          = 66
-	SYS_MUNMAP                         = 73
-	SYS_MPROTECT                       = 74
-	SYS_MADVISE                        = 75
-	SYS_MINCORE                        = 78
-	SYS_GETGROUPS                      = 79
-	SYS_SETGROUPS                      = 80
-	SYS_GETPGRP                        = 81
-	SYS_SETPGID                        = 82
-	SYS_SETITIMER                      = 83
-	SYS_SWAPON                         = 85
-	SYS_GETITIMER                      = 86
-	SYS_GETDTABLESIZE                  = 89
-	SYS_DUP2                           = 90
-	SYS_FCNTL                          = 92
-	SYS_SELECT                         = 93
-	SYS_FSYNC                          = 95
-	SYS_SETPRIORITY                    = 96
-	SYS_SOCKET                         = 97
-	SYS_CONNECT                        = 98
-	SYS_GETPRIORITY                    = 100
-	SYS_BIND                           = 104
-	SYS_SETSOCKOPT                     = 105
-	SYS_LISTEN                         = 106
-	SYS_SIGSUSPEND                     = 111
-	SYS_GETTIMEOFDAY                   = 116
-	SYS_GETRUSAGE                      = 117
-	SYS_GETSOCKOPT                     = 118
-	SYS_READV                          = 120
-	SYS_WRITEV                         = 121
-	SYS_SETTIMEOFDAY                   = 122
-	SYS_FCHOWN                         = 123
-	SYS_FCHMOD                         = 124
-	SYS_SETREUID                       = 126
-	SYS_SETREGID                       = 127
-	SYS_RENAME                         = 128
-	SYS_FLOCK                          = 131
-	SYS_MKFIFO                         = 132
-	SYS_SENDTO                         = 133
-	SYS_SHUTDOWN                       = 134
-	SYS_SOCKETPAIR                     = 135
-	SYS_MKDIR                          = 136
-	SYS_RMDIR                          = 137
-	SYS_UTIMES                         = 138
-	SYS_FUTIMES                        = 139
-	SYS_ADJTIME                        = 140
-	SYS_GETHOSTUUID                    = 142
-	SYS_SETSID                         = 147
-	SYS_GETPGID                        = 151
-	SYS_SETPRIVEXEC                    = 152
-	SYS_PREAD                          = 153
-	SYS_PWRITE                         = 154
-	SYS_NFSSVC                         = 155
-	SYS_STATFS                         = 157
-	SYS_FSTATFS                        = 158
-	SYS_UNMOUNT                        = 159
-	SYS_GETFH                          = 161
-	SYS_QUOTACTL                       = 165
-	SYS_MOUNT                          = 167
-	SYS_CSOPS                          = 169
-	SYS_CSOPS_AUDITTOKEN               = 170
-	SYS_WAITID                         = 173
-	SYS_KDEBUG_TYPEFILTER              = 177
-	SYS_KDEBUG_TRACE_STRING            = 178
-	SYS_KDEBUG_TRACE64                 = 179
-	SYS_KDEBUG_TRACE                   = 180
-	SYS_SETGID                         = 181
-	SYS_SETEGID                        = 182
-	SYS_SETEUID                        = 183
-	SYS_SIGRETURN                      = 184
-	SYS_THREAD_SELFCOUNTS              = 186
-	SYS_FDATASYNC                      = 187
-	SYS_STAT                           = 188
-	SYS_FSTAT                          = 189
-	SYS_LSTAT                          = 190
-	SYS_PATHCONF                       = 191
-	SYS_FPATHCONF                      = 192
-	SYS_GETRLIMIT                      = 194
-	SYS_SETRLIMIT                      = 195
-	SYS_GETDIRENTRIES                  = 196
-	SYS_MMAP                           = 197
-	SYS_LSEEK                          = 199
-	SYS_TRUNCATE                       = 200
-	SYS_FTRUNCATE                      = 201
-	SYS_SYSCTL                         = 202
-	SYS_MLOCK                          = 203
-	SYS_MUNLOCK                        = 204
-	SYS_UNDELETE                       = 205
-	SYS_OPEN_DPROTECTED_NP             = 216
-	SYS_GETATTRLIST                    = 220
-	SYS_SETATTRLIST                    = 221
-	SYS_GETDIRENTRIESATTR              = 222
-	SYS_EXCHANGEDATA                   = 223
-	SYS_SEARCHFS                       = 225
-	SYS_DELETE                         = 226
-	SYS_COPYFILE                       = 227
-	SYS_FGETATTRLIST                   = 228
-	SYS_FSETATTRLIST                   = 229
-	SYS_POLL                           = 230
-	SYS_WATCHEVENT                     = 231
-	SYS_WAITEVENT                      = 232
-	SYS_MODWATCH                       = 233
-	SYS_GETXATTR                       = 234
-	SYS_FGETXATTR                      = 235
-	SYS_SETXATTR                       = 236
-	SYS_FSETXATTR                      = 237
-	SYS_REMOVEXATTR                    = 238
-	SYS_FREMOVEXATTR                   = 239
-	SYS_LISTXATTR                      = 240
-	SYS_FLISTXATTR                     = 241
-	SYS_FSCTL                          = 242
-	SYS_INITGROUPS                     = 243
-	SYS_POSIX_SPAWN                    = 244
-	SYS_FFSCTL                         = 245
-	SYS_NFSCLNT                        = 247
-	SYS_FHOPEN                         = 248
-	SYS_MINHERIT                       = 250
-	SYS_SEMSYS                         = 251
-	SYS_MSGSYS                         = 252
-	SYS_SHMSYS                         = 253
-	SYS_SEMCTL                         = 254
-	SYS_SEMGET                         = 255
-	SYS_SEMOP                          = 256
-	SYS_MSGCTL                         = 258
-	SYS_MSGGET                         = 259
-	SYS_MSGSND                         = 260
-	SYS_MSGRCV                         = 261
-	SYS_SHMAT                          = 262
-	SYS_SHMCTL                         = 263
-	SYS_SHMDT                          = 264
-	SYS_SHMGET                         = 265
-	SYS_SHM_OPEN                       = 266
-	SYS_SHM_UNLINK                     = 267
-	SYS_SEM_OPEN                       = 268
-	SYS_SEM_CLOSE                      = 269
-	SYS_SEM_UNLINK                     = 270
-	SYS_SEM_WAIT                       = 271
-	SYS_SEM_TRYWAIT                    = 272
-	SYS_SEM_POST                       = 273
-	SYS_SYSCTLBYNAME                   = 274
-	SYS_OPEN_EXTENDED                  = 277
-	SYS_UMASK_EXTENDED                 = 278
-	SYS_STAT_EXTENDED                  = 279
-	SYS_LSTAT_EXTENDED                 = 280
-	SYS_FSTAT_EXTENDED                 = 281
-	SYS_CHMOD_EXTENDED                 = 282
-	SYS_FCHMOD_EXTENDED                = 283
-	SYS_ACCESS_EXTENDED                = 284
-	SYS_SETTID                         = 285
-	SYS_GETTID                         = 286
-	SYS_SETSGROUPS                     = 287
-	SYS_GETSGROUPS                     = 288
-	SYS_SETWGROUPS                     = 289
-	SYS_GETWGROUPS                     = 290
-	SYS_MKFIFO_EXTENDED                = 291
-	SYS_MKDIR_EXTENDED                 = 292
-	SYS_IDENTITYSVC                    = 293
-	SYS_SHARED_REGION_CHECK_NP         = 294
-	SYS_VM_PRESSURE_MONITOR            = 296
-	SYS_PSYNCH_RW_LONGRDLOCK           = 297
-	SYS_PSYNCH_RW_YIELDWRLOCK          = 298
-	SYS_PSYNCH_RW_DOWNGRADE            = 299
-	SYS_PSYNCH_RW_UPGRADE              = 300
-	SYS_PSYNCH_MUTEXWAIT               = 301
-	SYS_PSYNCH_MUTEXDROP               = 302
-	SYS_PSYNCH_CVBROAD                 = 303
-	SYS_PSYNCH_CVSIGNAL                = 304
-	SYS_PSYNCH_CVWAIT                  = 305
-	SYS_PSYNCH_RW_RDLOCK               = 306
-	SYS_PSYNCH_RW_WRLOCK               = 307
-	SYS_PSYNCH_RW_UNLOCK               = 308
-	SYS_PSYNCH_RW_UNLOCK2              = 309
-	SYS_GETSID                         = 310
-	SYS_SETTID_WITH_PID                = 311
-	SYS_PSYNCH_CVCLRPREPOST            = 312
-	SYS_AIO_FSYNC                      = 313
-	SYS_AIO_RETURN                     = 314
-	SYS_AIO_SUSPEND                    = 315
-	SYS_AIO_CANCEL                     = 316
-	SYS_AIO_ERROR                      = 317
-	SYS_AIO_READ                       = 318
-	SYS_AIO_WRITE                      = 319
-	SYS_LIO_LISTIO                     = 320
-	SYS_IOPOLICYSYS                    = 322
-	SYS_PROCESS_POLICY                 = 323
-	SYS_MLOCKALL                       = 324
-	SYS_MUNLOCKALL                     = 325
-	SYS_ISSETUGID                      = 327
-	SYS___PTHREAD_KILL                 = 328
-	SYS___PTHREAD_SIGMASK              = 329
-	SYS___SIGWAIT                      = 330
-	SYS___DISABLE_THREADSIGNAL         = 331
-	SYS___PTHREAD_MARKCANCEL           = 332
-	SYS___PTHREAD_CANCELED             = 333
-	SYS___SEMWAIT_SIGNAL               = 334
-	SYS_PROC_INFO                      = 336
-	SYS_SENDFILE                       = 337
-	SYS_STAT64                         = 338
-	SYS_FSTAT64                        = 339
-	SYS_LSTAT64                        = 340
-	SYS_STAT64_EXTENDED                = 341
-	SYS_LSTAT64_EXTENDED               = 342
-	SYS_FSTAT64_EXTENDED               = 343
-	SYS_GETDIRENTRIES64                = 344
-	SYS_STATFS64                       = 345
-	SYS_FSTATFS64                      = 346
-	SYS_GETFSSTAT64                    = 347
-	SYS___PTHREAD_CHDIR                = 348
-	SYS___PTHREAD_FCHDIR               = 349
-	SYS_AUDIT                          = 350
-	SYS_AUDITON                        = 351
-	SYS_GETAUID                        = 353
-	SYS_SETAUID                        = 354
-	SYS_GETAUDIT_ADDR                  = 357
-	SYS_SETAUDIT_ADDR                  = 358
-	SYS_AUDITCTL                       = 359
-	SYS_BSDTHREAD_CREATE               = 360
-	SYS_BSDTHREAD_TERMINATE            = 361
-	SYS_KQUEUE                         = 362
-	SYS_KEVENT                         = 363
-	SYS_LCHOWN                         = 364
-	SYS_BSDTHREAD_REGISTER             = 366
-	SYS_WORKQ_OPEN                     = 367
-	SYS_WORKQ_KERNRETURN               = 368
-	SYS_KEVENT64                       = 369
-	SYS___OLD_SEMWAIT_SIGNAL           = 370
-	SYS___OLD_SEMWAIT_SIGNAL_NOCANCEL  = 371
-	SYS_THREAD_SELFID                  = 372
-	SYS_LEDGER                         = 373
-	SYS_KEVENT_QOS                     = 374
-	SYS_KEVENT_ID                      = 375
-	SYS___MAC_EXECVE                   = 380
-	SYS___MAC_SYSCALL                  = 381
-	SYS___MAC_GET_FILE                 = 382
-	SYS___MAC_SET_FILE                 = 383
-	SYS___MAC_GET_LINK                 = 384
-	SYS___MAC_SET_LINK                 = 385
-	SYS___MAC_GET_PROC                 = 386
-	SYS___MAC_SET_PROC                 = 387
-	SYS___MAC_GET_FD                   = 388
-	SYS___MAC_SET_FD                   = 389
-	SYS___MAC_GET_PID                  = 390
-	SYS_PSELECT                        = 394
-	SYS_PSELECT_NOCANCEL               = 395
-	SYS_READ_NOCANCEL                  = 396
-	SYS_WRITE_NOCANCEL                 = 397
-	SYS_OPEN_NOCANCEL                  = 398
-	SYS_CLOSE_NOCANCEL                 = 399
-	SYS_WAIT4_NOCANCEL                 = 400
-	SYS_RECVMSG_NOCANCEL               = 401
-	SYS_SENDMSG_NOCANCEL               = 402
-	SYS_RECVFROM_NOCANCEL              = 403
-	SYS_ACCEPT_NOCANCEL                = 404
-	SYS_MSYNC_NOCANCEL                 = 405
-	SYS_FCNTL_NOCANCEL                 = 406
-	SYS_SELECT_NOCANCEL                = 407
-	SYS_FSYNC_NOCANCEL                 = 408
-	SYS_CONNECT_NOCANCEL               = 409
-	SYS_SIGSUSPEND_NOCANCEL            = 410
-	SYS_READV_NOCANCEL                 = 411
-	SYS_WRITEV_NOCANCEL                = 412
-	SYS_SENDTO_NOCANCEL                = 413
-	SYS_PREAD_NOCANCEL                 = 414
-	SYS_PWRITE_NOCANCEL                = 415
-	SYS_WAITID_NOCANCEL                = 416
-	SYS_POLL_NOCANCEL                  = 417
-	SYS_MSGSND_NOCANCEL                = 418
-	SYS_MSGRCV_NOCANCEL                = 419
-	SYS_SEM_WAIT_NOCANCEL              = 420
-	SYS_AIO_SUSPEND_NOCANCEL           = 421
-	SYS___SIGWAIT_NOCANCEL             = 422
-	SYS___SEMWAIT_SIGNAL_NOCANCEL      = 423
-	SYS___MAC_MOUNT                    = 424
-	SYS___MAC_GET_MOUNT                = 425
-	SYS___MAC_GETFSSTAT                = 426
-	SYS_FSGETPATH                      = 427
-	SYS_AUDIT_SESSION_SELF             = 428
-	SYS_AUDIT_SESSION_JOIN             = 429
-	SYS_FILEPORT_MAKEPORT              = 430
-	SYS_FILEPORT_MAKEFD                = 431
-	SYS_AUDIT_SESSION_PORT             = 432
-	SYS_PID_SUSPEND                    = 433
-	SYS_PID_RESUME                     = 434
-	SYS_PID_HIBERNATE                  = 435
-	SYS_PID_SHUTDOWN_SOCKETS           = 436
-	SYS_SHARED_REGION_MAP_AND_SLIDE_NP = 438
-	SYS_KAS_INFO                       = 439
-	SYS_MEMORYSTATUS_CONTROL           = 440
-	SYS_GUARDED_OPEN_NP                = 441
-	SYS_GUARDED_CLOSE_NP               = 442
-	SYS_GUARDED_KQUEUE_NP              = 443
-	SYS_CHANGE_FDGUARD_NP              = 444
-	SYS_USRCTL                         = 445
-	SYS_PROC_RLIMIT_CONTROL            = 446
-	SYS_CONNECTX                       = 447
-	SYS_DISCONNECTX                    = 448
-	SYS_PEELOFF                        = 449
-	SYS_SOCKET_DELEGATE                = 450
-	SYS_TELEMETRY                      = 451
-	SYS_PROC_UUID_POLICY               = 452
-	SYS_MEMORYSTATUS_GET_LEVEL         = 453
-	SYS_SYSTEM_OVERRIDE                = 454
-	SYS_VFS_PURGE                      = 455
-	SYS_SFI_CTL                        = 456
-	SYS_SFI_PIDCTL                     = 457
-	SYS_COALITION                      = 458
-	SYS_COALITION_INFO                 = 459
-	SYS_NECP_MATCH_POLICY              = 460
-	SYS_GETATTRLISTBULK                = 461
-	SYS_CLONEFILEAT                    = 462
-	SYS_OPENAT                         = 463
-	SYS_OPENAT_NOCANCEL                = 464
-	SYS_RENAMEAT                       = 465
-	SYS_FACCESSAT                      = 466
-	SYS_FCHMODAT                       = 467
-	SYS_FCHOWNAT                       = 468
-	SYS_FSTATAT                        = 469
-	SYS_FSTATAT64                      = 470
-	SYS_LINKAT                         = 471
-	SYS_UNLINKAT                       = 472
-	SYS_READLINKAT                     = 473
-	SYS_SYMLINKAT                      = 474
-	SYS_MKDIRAT                        = 475
-	SYS_GETATTRLISTAT                  = 476
-	SYS_PROC_TRACE_LOG                 = 477
-	SYS_BSDTHREAD_CTL                  = 478
-	SYS_OPENBYID_NP                    = 479
-	SYS_RECVMSG_X                      = 480
-	SYS_SENDMSG_X                      = 481
-	SYS_THREAD_SELFUSAGE               = 482
-	SYS_CSRCTL                         = 483
-	SYS_GUARDED_OPEN_DPROTECTED_NP     = 484
-	SYS_GUARDED_WRITE_NP               = 485
-	SYS_GUARDED_PWRITE_NP              = 486
-	SYS_GUARDED_WRITEV_NP              = 487
-	SYS_RENAMEATX_NP                   = 488
-	SYS_MREMAP_ENCRYPTED               = 489
-	SYS_NETAGENT_TRIGGER               = 490
-	SYS_STACK_SNAPSHOT_WITH_CONFIG     = 491
-	SYS_MICROSTACKSHOT                 = 492
-	SYS_GRAB_PGO_DATA                  = 493
-	SYS_PERSONA                        = 494
-	SYS_WORK_INTERVAL_CTL              = 499
-	SYS_GETENTROPY                     = 500
-	SYS_NECP_OPEN                      = 501
-	SYS_NECP_CLIENT_ACTION             = 502
-	SYS___NEXUS_OPEN                   = 503
-	SYS___NEXUS_REGISTER               = 504
-	SYS___NEXUS_DEREGISTER             = 505
-	SYS___NEXUS_CREATE                 = 506
-	SYS___NEXUS_DESTROY                = 507
-	SYS___NEXUS_GET_OPT                = 508
-	SYS___NEXUS_SET_OPT                = 509
-	SYS___CHANNEL_OPEN                 = 510
-	SYS___CHANNEL_GET_INFO             = 511
-	SYS___CHANNEL_SYNC                 = 512
-	SYS___CHANNEL_GET_OPT              = 513
-	SYS___CHANNEL_SET_OPT              = 514
-	SYS_ULOCK_WAIT                     = 515
-	SYS_ULOCK_WAKE                     = 516
-	SYS_FCLONEFILEAT                   = 517
-	SYS_FS_SNAPSHOT                    = 518
-	SYS_TERMINATE_WITH_PAYLOAD         = 520
-	SYS_ABORT_WITH_PAYLOAD             = 521
-	SYS_NECP_SESSION_OPEN              = 522
-	SYS_NECP_SESSION_ACTION            = 523
-	SYS_SETATTRLISTAT                  = 524
-	SYS_NET_QOS_GUIDELINE              = 525
-	SYS_FMOUNT                         = 526
-	SYS_NTP_ADJTIME                    = 527
-	SYS_NTP_GETTIME                    = 528
-	SYS_OS_FAULT_WITH_PAYLOAD          = 529
-	SYS_MAXSYSCALL                     = 530
-	SYS_INVALID                        = 63
-)
diff --git a/src/cmd/vendor/golang.org/x/sys/unix/zsysnum_darwin_arm.go b/src/cmd/vendor/golang.org/x/sys/unix/zsysnum_darwin_arm.go
deleted file mode 100644
index 6dc736449a..0000000000
--- a/src/cmd/vendor/golang.org/x/sys/unix/zsysnum_darwin_arm.go
+++ /dev/null
@@ -1,438 +0,0 @@
-// go run mksysnum.go /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS11.1.sdk/usr/include/sys/syscall.h
-// Code generated by the command above; see README.md. DO NOT EDIT.
-
-//go:build arm && darwin
-// +build arm,darwin
-
-package unix
-
-// Deprecated: Use libSystem wrappers instead of direct syscalls.
-const (
-	SYS_SYSCALL                        = 0
-	SYS_EXIT                           = 1
-	SYS_FORK                           = 2
-	SYS_READ                           = 3
-	SYS_WRITE                          = 4
-	SYS_OPEN                           = 5
-	SYS_CLOSE                          = 6
-	SYS_WAIT4                          = 7
-	SYS_LINK                           = 9
-	SYS_UNLINK                         = 10
-	SYS_CHDIR                          = 12
-	SYS_FCHDIR                         = 13
-	SYS_MKNOD                          = 14
-	SYS_CHMOD                          = 15
-	SYS_CHOWN                          = 16
-	SYS_GETFSSTAT                      = 18
-	SYS_GETPID                         = 20
-	SYS_SETUID                         = 23
-	SYS_GETUID                         = 24
-	SYS_GETEUID                        = 25
-	SYS_PTRACE                         = 26
-	SYS_RECVMSG                        = 27
-	SYS_SENDMSG                        = 28
-	SYS_RECVFROM                       = 29
-	SYS_ACCEPT                         = 30
-	SYS_GETPEERNAME                    = 31
-	SYS_GETSOCKNAME                    = 32
-	SYS_ACCESS                         = 33
-	SYS_CHFLAGS                        = 34
-	SYS_FCHFLAGS                       = 35
-	SYS_SYNC                           = 36
-	SYS_KILL                           = 37
-	SYS_GETPPID                        = 39
-	SYS_DUP                            = 41
-	SYS_PIPE                           = 42
-	SYS_GETEGID                        = 43
-	SYS_SIGACTION                      = 46
-	SYS_GETGID                         = 47
-	SYS_SIGPROCMASK                    = 48
-	SYS_GETLOGIN                       = 49
-	SYS_SETLOGIN                       = 50
-	SYS_ACCT                           = 51
-	SYS_SIGPENDING                     = 52
-	SYS_SIGALTSTACK                    = 53
-	SYS_IOCTL                          = 54
-	SYS_REBOOT                         = 55
-	SYS_REVOKE                         = 56
-	SYS_SYMLINK                        = 57
-	SYS_READLINK                       = 58
-	SYS_EXECVE                         = 59
-	SYS_UMASK                          = 60
-	SYS_CHROOT                         = 61
-	SYS_MSYNC                          = 65
-	SYS_VFORK                          = 66
-	SYS_MUNMAP                         = 73
-	SYS_MPROTECT                       = 74
-	SYS_MADVISE                        = 75
-	SYS_MINCORE                        = 78
-	SYS_GETGROUPS                      = 79
-	SYS_SETGROUPS                      = 80
-	SYS_GETPGRP                        = 81
-	SYS_SETPGID                        = 82
-	SYS_SETITIMER                      = 83
-	SYS_SWAPON                         = 85
-	SYS_GETITIMER                      = 86
-	SYS_GETDTABLESIZE                  = 89
-	SYS_DUP2                           = 90
-	SYS_FCNTL                          = 92
-	SYS_SELECT                         = 93
-	SYS_FSYNC                          = 95
-	SYS_SETPRIORITY                    = 96
-	SYS_SOCKET                         = 97
-	SYS_CONNECT                        = 98
-	SYS_GETPRIORITY                    = 100
-	SYS_BIND                           = 104
-	SYS_SETSOCKOPT                     = 105
-	SYS_LISTEN                         = 106
-	SYS_SIGSUSPEND                     = 111
-	SYS_GETTIMEOFDAY                   = 116
-	SYS_GETRUSAGE                      = 117
-	SYS_GETSOCKOPT                     = 118
-	SYS_READV                          = 120
-	SYS_WRITEV                         = 121
-	SYS_SETTIMEOFDAY                   = 122
-	SYS_FCHOWN                         = 123
-	SYS_FCHMOD                         = 124
-	SYS_SETREUID                       = 126
-	SYS_SETREGID                       = 127
-	SYS_RENAME                         = 128
-	SYS_FLOCK                          = 131
-	SYS_MKFIFO                         = 132
-	SYS_SENDTO                         = 133
-	SYS_SHUTDOWN                       = 134
-	SYS_SOCKETPAIR                     = 135
-	SYS_MKDIR                          = 136
-	SYS_RMDIR                          = 137
-	SYS_UTIMES                         = 138
-	SYS_FUTIMES                        = 139
-	SYS_ADJTIME                        = 140
-	SYS_GETHOSTUUID                    = 142
-	SYS_SETSID                         = 147
-	SYS_GETPGID                        = 151
-	SYS_SETPRIVEXEC                    = 152
-	SYS_PREAD                          = 153
-	SYS_PWRITE                         = 154
-	SYS_NFSSVC                         = 155
-	SYS_STATFS                         = 157
-	SYS_FSTATFS                        = 158
-	SYS_UNMOUNT                        = 159
-	SYS_GETFH                          = 161
-	SYS_QUOTACTL                       = 165
-	SYS_MOUNT                          = 167
-	SYS_CSOPS                          = 169
-	SYS_CSOPS_AUDITTOKEN               = 170
-	SYS_WAITID                         = 173
-	SYS_KDEBUG_TYPEFILTER              = 177
-	SYS_KDEBUG_TRACE_STRING            = 178
-	SYS_KDEBUG_TRACE64                 = 179
-	SYS_KDEBUG_TRACE                   = 180
-	SYS_SETGID                         = 181
-	SYS_SETEGID                        = 182
-	SYS_SETEUID                        = 183
-	SYS_SIGRETURN                      = 184
-	SYS_THREAD_SELFCOUNTS              = 186
-	SYS_FDATASYNC                      = 187
-	SYS_STAT                           = 188
-	SYS_FSTAT                          = 189
-	SYS_LSTAT                          = 190
-	SYS_PATHCONF                       = 191
-	SYS_FPATHCONF                      = 192
-	SYS_GETRLIMIT                      = 194
-	SYS_SETRLIMIT                      = 195
-	SYS_GETDIRENTRIES                  = 196
-	SYS_MMAP                           = 197
-	SYS_LSEEK                          = 199
-	SYS_TRUNCATE                       = 200
-	SYS_FTRUNCATE                      = 201
-	SYS_SYSCTL                         = 202
-	SYS_MLOCK                          = 203
-	SYS_MUNLOCK                        = 204
-	SYS_UNDELETE                       = 205
-	SYS_OPEN_DPROTECTED_NP             = 216
-	SYS_GETATTRLIST                    = 220
-	SYS_SETATTRLIST                    = 221
-	SYS_GETDIRENTRIESATTR              = 222
-	SYS_EXCHANGEDATA                   = 223
-	SYS_SEARCHFS                       = 225
-	SYS_DELETE                         = 226
-	SYS_COPYFILE                       = 227
-	SYS_FGETATTRLIST                   = 228
-	SYS_FSETATTRLIST                   = 229
-	SYS_POLL                           = 230
-	SYS_WATCHEVENT                     = 231
-	SYS_WAITEVENT                      = 232
-	SYS_MODWATCH                       = 233
-	SYS_GETXATTR                       = 234
-	SYS_FGETXATTR                      = 235
-	SYS_SETXATTR                       = 236
-	SYS_FSETXATTR                      = 237
-	SYS_REMOVEXATTR                    = 238
-	SYS_FREMOVEXATTR                   = 239
-	SYS_LISTXATTR                      = 240
-	SYS_FLISTXATTR                     = 241
-	SYS_FSCTL                          = 242
-	SYS_INITGROUPS                     = 243
-	SYS_POSIX_SPAWN                    = 244
-	SYS_FFSCTL                         = 245
-	SYS_NFSCLNT                        = 247
-	SYS_FHOPEN                         = 248
-	SYS_MINHERIT                       = 250
-	SYS_SEMSYS                         = 251
-	SYS_MSGSYS                         = 252
-	SYS_SHMSYS                         = 253
-	SYS_SEMCTL                         = 254
-	SYS_SEMGET                         = 255
-	SYS_SEMOP                          = 256
-	SYS_MSGCTL                         = 258
-	SYS_MSGGET                         = 259
-	SYS_MSGSND                         = 260
-	SYS_MSGRCV                         = 261
-	SYS_SHMAT                          = 262
-	SYS_SHMCTL                         = 263
-	SYS_SHMDT                          = 264
-	SYS_SHMGET                         = 265
-	SYS_SHM_OPEN                       = 266
-	SYS_SHM_UNLINK                     = 267
-	SYS_SEM_OPEN                       = 268
-	SYS_SEM_CLOSE                      = 269
-	SYS_SEM_UNLINK                     = 270
-	SYS_SEM_WAIT                       = 271
-	SYS_SEM_TRYWAIT                    = 272
-	SYS_SEM_POST                       = 273
-	SYS_SYSCTLBYNAME                   = 274
-	SYS_OPEN_EXTENDED                  = 277
-	SYS_UMASK_EXTENDED                 = 278
-	SYS_STAT_EXTENDED                  = 279
-	SYS_LSTAT_EXTENDED                 = 280
-	SYS_FSTAT_EXTENDED                 = 281
-	SYS_CHMOD_EXTENDED                 = 282
-	SYS_FCHMOD_EXTENDED                = 283
-	SYS_ACCESS_EXTENDED                = 284
-	SYS_SETTID                         = 285
-	SYS_GETTID                         = 286
-	SYS_SETSGROUPS                     = 287
-	SYS_GETSGROUPS                     = 288
-	SYS_SETWGROUPS                     = 289
-	SYS_GETWGROUPS                     = 290
-	SYS_MKFIFO_EXTENDED                = 291
-	SYS_MKDIR_EXTENDED                 = 292
-	SYS_IDENTITYSVC                    = 293
-	SYS_SHARED_REGION_CHECK_NP         = 294
-	SYS_VM_PRESSURE_MONITOR            = 296
-	SYS_PSYNCH_RW_LONGRDLOCK           = 297
-	SYS_PSYNCH_RW_YIELDWRLOCK          = 298
-	SYS_PSYNCH_RW_DOWNGRADE            = 299
-	SYS_PSYNCH_RW_UPGRADE              = 300
-	SYS_PSYNCH_MUTEXWAIT               = 301
-	SYS_PSYNCH_MUTEXDROP               = 302
-	SYS_PSYNCH_CVBROAD                 = 303
-	SYS_PSYNCH_CVSIGNAL                = 304
-	SYS_PSYNCH_CVWAIT                  = 305
-	SYS_PSYNCH_RW_RDLOCK               = 306
-	SYS_PSYNCH_RW_WRLOCK               = 307
-	SYS_PSYNCH_RW_UNLOCK               = 308
-	SYS_PSYNCH_RW_UNLOCK2              = 309
-	SYS_GETSID                         = 310
-	SYS_SETTID_WITH_PID                = 311
-	SYS_PSYNCH_CVCLRPREPOST            = 312
-	SYS_AIO_FSYNC                      = 313
-	SYS_AIO_RETURN                     = 314
-	SYS_AIO_SUSPEND                    = 315
-	SYS_AIO_CANCEL                     = 316
-	SYS_AIO_ERROR                      = 317
-	SYS_AIO_READ                       = 318
-	SYS_AIO_WRITE                      = 319
-	SYS_LIO_LISTIO                     = 320
-	SYS_IOPOLICYSYS                    = 322
-	SYS_PROCESS_POLICY                 = 323
-	SYS_MLOCKALL                       = 324
-	SYS_MUNLOCKALL                     = 325
-	SYS_ISSETUGID                      = 327
-	SYS___PTHREAD_KILL                 = 328
-	SYS___PTHREAD_SIGMASK              = 329
-	SYS___SIGWAIT                      = 330
-	SYS___DISABLE_THREADSIGNAL         = 331
-	SYS___PTHREAD_MARKCANCEL           = 332
-	SYS___PTHREAD_CANCELED             = 333
-	SYS___SEMWAIT_SIGNAL               = 334
-	SYS_PROC_INFO                      = 336
-	SYS_SENDFILE                       = 337
-	SYS_STAT64                         = 338
-	SYS_FSTAT64                        = 339
-	SYS_LSTAT64                        = 340
-	SYS_STAT64_EXTENDED                = 341
-	SYS_LSTAT64_EXTENDED               = 342
-	SYS_FSTAT64_EXTENDED               = 343
-	SYS_GETDIRENTRIES64                = 344
-	SYS_STATFS64                       = 345
-	SYS_FSTATFS64                      = 346
-	SYS_GETFSSTAT64                    = 347
-	SYS___PTHREAD_CHDIR                = 348
-	SYS___PTHREAD_FCHDIR               = 349
-	SYS_AUDIT                          = 350
-	SYS_AUDITON                        = 351
-	SYS_GETAUID                        = 353
-	SYS_SETAUID                        = 354
-	SYS_GETAUDIT_ADDR                  = 357
-	SYS_SETAUDIT_ADDR                  = 358
-	SYS_AUDITCTL                       = 359
-	SYS_BSDTHREAD_CREATE               = 360
-	SYS_BSDTHREAD_TERMINATE            = 361
-	SYS_KQUEUE                         = 362
-	SYS_KEVENT                         = 363
-	SYS_LCHOWN                         = 364
-	SYS_BSDTHREAD_REGISTER             = 366
-	SYS_WORKQ_OPEN                     = 367
-	SYS_WORKQ_KERNRETURN               = 368
-	SYS_KEVENT64                       = 369
-	SYS___OLD_SEMWAIT_SIGNAL           = 370
-	SYS___OLD_SEMWAIT_SIGNAL_NOCANCEL  = 371
-	SYS_THREAD_SELFID                  = 372
-	SYS_LEDGER                         = 373
-	SYS_KEVENT_QOS                     = 374
-	SYS_KEVENT_ID                      = 375
-	SYS___MAC_EXECVE                   = 380
-	SYS___MAC_SYSCALL                  = 381
-	SYS___MAC_GET_FILE                 = 382
-	SYS___MAC_SET_FILE                 = 383
-	SYS___MAC_GET_LINK                 = 384
-	SYS___MAC_SET_LINK                 = 385
-	SYS___MAC_GET_PROC                 = 386
-	SYS___MAC_SET_PROC                 = 387
-	SYS___MAC_GET_FD                   = 388
-	SYS___MAC_SET_FD                   = 389
-	SYS___MAC_GET_PID                  = 390
-	SYS_PSELECT                        = 394
-	SYS_PSELECT_NOCANCEL               = 395
-	SYS_READ_NOCANCEL                  = 396
-	SYS_WRITE_NOCANCEL                 = 397
-	SYS_OPEN_NOCANCEL                  = 398
-	SYS_CLOSE_NOCANCEL                 = 399
-	SYS_WAIT4_NOCANCEL                 = 400
-	SYS_RECVMSG_NOCANCEL               = 401
-	SYS_SENDMSG_NOCANCEL               = 402
-	SYS_RECVFROM_NOCANCEL              = 403
-	SYS_ACCEPT_NOCANCEL                = 404
-	SYS_MSYNC_NOCANCEL                 = 405
-	SYS_FCNTL_NOCANCEL                 = 406
-	SYS_SELECT_NOCANCEL                = 407
-	SYS_FSYNC_NOCANCEL                 = 408
-	SYS_CONNECT_NOCANCEL               = 409
-	SYS_SIGSUSPEND_NOCANCEL            = 410
-	SYS_READV_NOCANCEL                 = 411
-	SYS_WRITEV_NOCANCEL                = 412
-	SYS_SENDTO_NOCANCEL                = 413
-	SYS_PREAD_NOCANCEL                 = 414
-	SYS_PWRITE_NOCANCEL                = 415
-	SYS_WAITID_NOCANCEL                = 416
-	SYS_POLL_NOCANCEL                  = 417
-	SYS_MSGSND_NOCANCEL                = 418
-	SYS_MSGRCV_NOCANCEL                = 419
-	SYS_SEM_WAIT_NOCANCEL              = 420
-	SYS_AIO_SUSPEND_NOCANCEL           = 421
-	SYS___SIGWAIT_NOCANCEL             = 422
-	SYS___SEMWAIT_SIGNAL_NOCANCEL      = 423
-	SYS___MAC_MOUNT                    = 424
-	SYS___MAC_GET_MOUNT                = 425
-	SYS___MAC_GETFSSTAT                = 426
-	SYS_FSGETPATH                      = 427
-	SYS_AUDIT_SESSION_SELF             = 428
-	SYS_AUDIT_SESSION_JOIN             = 429
-	SYS_FILEPORT_MAKEPORT              = 430
-	SYS_FILEPORT_MAKEFD                = 431
-	SYS_AUDIT_SESSION_PORT             = 432
-	SYS_PID_SUSPEND                    = 433
-	SYS_PID_RESUME                     = 434
-	SYS_PID_HIBERNATE                  = 435
-	SYS_PID_SHUTDOWN_SOCKETS           = 436
-	SYS_SHARED_REGION_MAP_AND_SLIDE_NP = 438
-	SYS_KAS_INFO                       = 439
-	SYS_MEMORYSTATUS_CONTROL           = 440
-	SYS_GUARDED_OPEN_NP                = 441
-	SYS_GUARDED_CLOSE_NP               = 442
-	SYS_GUARDED_KQUEUE_NP              = 443
-	SYS_CHANGE_FDGUARD_NP              = 444
-	SYS_USRCTL                         = 445
-	SYS_PROC_RLIMIT_CONTROL            = 446
-	SYS_CONNECTX                       = 447
-	SYS_DISCONNECTX                    = 448
-	SYS_PEELOFF                        = 449
-	SYS_SOCKET_DELEGATE                = 450
-	SYS_TELEMETRY                      = 451
-	SYS_PROC_UUID_POLICY               = 452
-	SYS_MEMORYSTATUS_GET_LEVEL         = 453
-	SYS_SYSTEM_OVERRIDE                = 454
-	SYS_VFS_PURGE                      = 455
-	SYS_SFI_CTL                        = 456
-	SYS_SFI_PIDCTL                     = 457
-	SYS_COALITION                      = 458
-	SYS_COALITION_INFO                 = 459
-	SYS_NECP_MATCH_POLICY              = 460
-	SYS_GETATTRLISTBULK                = 461
-	SYS_CLONEFILEAT                    = 462
-	SYS_OPENAT                         = 463
-	SYS_OPENAT_NOCANCEL                = 464
-	SYS_RENAMEAT                       = 465
-	SYS_FACCESSAT                      = 466
-	SYS_FCHMODAT                       = 467
-	SYS_FCHOWNAT                       = 468
-	SYS_FSTATAT                        = 469
-	SYS_FSTATAT64                      = 470
-	SYS_LINKAT                         = 471
-	SYS_UNLINKAT                       = 472
-	SYS_READLINKAT                     = 473
-	SYS_SYMLINKAT                      = 474
-	SYS_MKDIRAT                        = 475
-	SYS_GETATTRLISTAT                  = 476
-	SYS_PROC_TRACE_LOG                 = 477
-	SYS_BSDTHREAD_CTL                  = 478
-	SYS_OPENBYID_NP                    = 479
-	SYS_RECVMSG_X                      = 480
-	SYS_SENDMSG_X                      = 481
-	SYS_THREAD_SELFUSAGE               = 482
-	SYS_CSRCTL                         = 483
-	SYS_GUARDED_OPEN_DPROTECTED_NP     = 484
-	SYS_GUARDED_WRITE_NP               = 485
-	SYS_GUARDED_PWRITE_NP              = 486
-	SYS_GUARDED_WRITEV_NP              = 487
-	SYS_RENAMEATX_NP                   = 488
-	SYS_MREMAP_ENCRYPTED               = 489
-	SYS_NETAGENT_TRIGGER               = 490
-	SYS_STACK_SNAPSHOT_WITH_CONFIG     = 491
-	SYS_MICROSTACKSHOT                 = 492
-	SYS_GRAB_PGO_DATA                  = 493
-	SYS_PERSONA                        = 494
-	SYS_WORK_INTERVAL_CTL              = 499
-	SYS_GETENTROPY                     = 500
-	SYS_NECP_OPEN                      = 501
-	SYS_NECP_CLIENT_ACTION             = 502
-	SYS___NEXUS_OPEN                   = 503
-	SYS___NEXUS_REGISTER               = 504
-	SYS___NEXUS_DEREGISTER             = 505
-	SYS___NEXUS_CREATE                 = 506
-	SYS___NEXUS_DESTROY                = 507
-	SYS___NEXUS_GET_OPT                = 508
-	SYS___NEXUS_SET_OPT                = 509
-	SYS___CHANNEL_OPEN                 = 510
-	SYS___CHANNEL_GET_INFO             = 511
-	SYS___CHANNEL_SYNC                 = 512
-	SYS___CHANNEL_GET_OPT              = 513
-	SYS___CHANNEL_SET_OPT              = 514
-	SYS_ULOCK_WAIT                     = 515
-	SYS_ULOCK_WAKE                     = 516
-	SYS_FCLONEFILEAT                   = 517
-	SYS_FS_SNAPSHOT                    = 518
-	SYS_TERMINATE_WITH_PAYLOAD         = 520
-	SYS_ABORT_WITH_PAYLOAD             = 521
-	SYS_NECP_SESSION_OPEN              = 522
-	SYS_NECP_SESSION_ACTION            = 523
-	SYS_SETATTRLISTAT                  = 524
-	SYS_NET_QOS_GUIDELINE              = 525
-	SYS_FMOUNT                         = 526
-	SYS_NTP_ADJTIME                    = 527
-	SYS_NTP_GETTIME                    = 528
-	SYS_OS_FAULT_WITH_PAYLOAD          = 529
-	SYS_MAXSYSCALL                     = 530
-	SYS_INVALID                        = 63
-)
diff --git a/src/cmd/vendor/golang.org/x/sys/unix/ztypes_darwin_386.go b/src/cmd/vendor/golang.org/x/sys/unix/ztypes_darwin_386.go
deleted file mode 100644
index 883b64a272..0000000000
--- a/src/cmd/vendor/golang.org/x/sys/unix/ztypes_darwin_386.go
+++ /dev/null
@@ -1,524 +0,0 @@
-// cgo -godefs types_darwin.go | go run mkpost.go
-// Code generated by the command above; see README.md. DO NOT EDIT.
-
-//go:build 386 && darwin
-// +build 386,darwin
-
-package unix
-
-const (
-	SizeofPtr      = 0x4
-	SizeofShort    = 0x2
-	SizeofInt      = 0x4
-	SizeofLong     = 0x4
-	SizeofLongLong = 0x8
-)
-
-type (
-	_C_short     int16
-	_C_int       int32
-	_C_long      int32
-	_C_long_long int64
-)
-
-type Timespec struct {
-	Sec  int32
-	Nsec int32
-}
-
-type Timeval struct {
-	Sec  int32
-	Usec int32
-}
-
-type Timeval32 struct{}
-
-type Rusage struct {
-	Utime    Timeval
-	Stime    Timeval
-	Maxrss   int32
-	Ixrss    int32
-	Idrss    int32
-	Isrss    int32
-	Minflt   int32
-	Majflt   int32
-	Nswap    int32
-	Inblock  int32
-	Oublock  int32
-	Msgsnd   int32
-	Msgrcv   int32
-	Nsignals int32
-	Nvcsw    int32
-	Nivcsw   int32
-}
-
-type Rlimit struct {
-	Cur uint64
-	Max uint64
-}
-
-type _Gid_t uint32
-
-type Stat_t struct {
-	Dev     int32
-	Mode    uint16
-	Nlink   uint16
-	Ino     uint64
-	Uid     uint32
-	Gid     uint32
-	Rdev    int32
-	Atim    Timespec
-	Mtim    Timespec
-	Ctim    Timespec
-	Btim    Timespec
-	Size    int64
-	Blocks  int64
-	Blksize int32
-	Flags   uint32
-	Gen     uint32
-	Lspare  int32
-	Qspare  [2]int64
-}
-
-type Statfs_t struct {
-	Bsize       uint32
-	Iosize      int32
-	Blocks      uint64
-	Bfree       uint64
-	Bavail      uint64
-	Files       uint64
-	Ffree       uint64
-	Fsid        Fsid
-	Owner       uint32
-	Type        uint32
-	Flags       uint32
-	Fssubtype   uint32
-	Fstypename  [16]byte
-	Mntonname   [1024]byte
-	Mntfromname [1024]byte
-	Reserved    [8]uint32
-}
-
-type Flock_t struct {
-	Start  int64
-	Len    int64
-	Pid    int32
-	Type   int16
-	Whence int16
-}
-
-type Fstore_t struct {
-	Flags      uint32
-	Posmode    int32
-	Offset     int64
-	Length     int64
-	Bytesalloc int64
-}
-
-type Radvisory_t struct {
-	Offset int64
-	Count  int32
-}
-
-type Fbootstraptransfer_t struct {
-	Offset int64
-	Length uint32
-	Buffer *byte
-}
-
-type Log2phys_t struct {
-	Flags       uint32
-	Contigbytes int64
-	Devoffset   int64
-}
-
-type Fsid struct {
-	Val [2]int32
-}
-
-type Dirent struct {
-	Ino     uint64
-	Seekoff uint64
-	Reclen  uint16
-	Namlen  uint16
-	Type    uint8
-	Name    [1024]int8
-	_       [3]byte
-}
-
-const (
-	PathMax = 0x400
-)
-
-type RawSockaddrInet4 struct {
-	Len    uint8
-	Family uint8
-	Port   uint16
-	Addr   [4]byte /* in_addr */
-	Zero   [8]int8
-}
-
-type RawSockaddrInet6 struct {
-	Len      uint8
-	Family   uint8
-	Port     uint16
-	Flowinfo uint32
-	Addr     [16]byte /* in6_addr */
-	Scope_id uint32
-}
-
-type RawSockaddrUnix struct {
-	Len    uint8
-	Family uint8
-	Path   [104]int8
-}
-
-type RawSockaddrDatalink struct {
-	Len    uint8
-	Family uint8
-	Index  uint16
-	Type   uint8
-	Nlen   uint8
-	Alen   uint8
-	Slen   uint8
-	Data   [12]int8
-}
-
-type RawSockaddr struct {
-	Len    uint8
-	Family uint8
-	Data   [14]int8
-}
-
-type RawSockaddrAny struct {
-	Addr RawSockaddr
-	Pad  [92]int8
-}
-
-type RawSockaddrCtl struct {
-	Sc_len      uint8
-	Sc_family   uint8
-	Ss_sysaddr  uint16
-	Sc_id       uint32
-	Sc_unit     uint32
-	Sc_reserved [5]uint32
-}
-
-type _Socklen uint32
-
-type Linger struct {
-	Onoff  int32
-	Linger int32
-}
-
-type Iovec struct {
-	Base *byte
-	Len  uint32
-}
-
-type IPMreq struct {
-	Multiaddr [4]byte /* in_addr */
-	Interface [4]byte /* in_addr */
-}
-
-type IPMreqn struct {
-	Multiaddr [4]byte /* in_addr */
-	Address   [4]byte /* in_addr */
-	Ifindex   int32
-}
-
-type IPv6Mreq struct {
-	Multiaddr [16]byte /* in6_addr */
-	Interface uint32
-}
-
-type Msghdr struct {
-	Name       *byte
-	Namelen    uint32
-	Iov        *Iovec
-	Iovlen     int32
-	Control    *byte
-	Controllen uint32
-	Flags      int32
-}
-
-type Cmsghdr struct {
-	Len   uint32
-	Level int32
-	Type  int32
-}
-
-type Inet4Pktinfo struct {
-	Ifindex  uint32
-	Spec_dst [4]byte /* in_addr */
-	Addr     [4]byte /* in_addr */
-}
-
-type Inet6Pktinfo struct {
-	Addr    [16]byte /* in6_addr */
-	Ifindex uint32
-}
-
-type IPv6MTUInfo struct {
-	Addr RawSockaddrInet6
-	Mtu  uint32
-}
-
-type ICMPv6Filter struct {
-	Filt [8]uint32
-}
-
-const (
-	SizeofSockaddrInet4    = 0x10
-	SizeofSockaddrInet6    = 0x1c
-	SizeofSockaddrAny      = 0x6c
-	SizeofSockaddrUnix     = 0x6a
-	SizeofSockaddrDatalink = 0x14
-	SizeofSockaddrCtl      = 0x20
-	SizeofLinger           = 0x8
-	SizeofIovec            = 0x8
-	SizeofIPMreq           = 0x8
-	SizeofIPMreqn          = 0xc
-	SizeofIPv6Mreq         = 0x14
-	SizeofMsghdr           = 0x1c
-	SizeofCmsghdr          = 0xc
-	SizeofInet4Pktinfo     = 0xc
-	SizeofInet6Pktinfo     = 0x14
-	SizeofIPv6MTUInfo      = 0x20
-	SizeofICMPv6Filter     = 0x20
-)
-
-const (
-	PTRACE_TRACEME = 0x0
-	PTRACE_CONT    = 0x7
-	PTRACE_KILL    = 0x8
-)
-
-type Kevent_t struct {
-	Ident  uint32
-	Filter int16
-	Flags  uint16
-	Fflags uint32
-	Data   int32
-	Udata  *byte
-}
-
-type FdSet struct {
-	Bits [32]int32
-}
-
-const (
-	SizeofIfMsghdr    = 0x70
-	SizeofIfData      = 0x60
-	SizeofIfaMsghdr   = 0x14
-	SizeofIfmaMsghdr  = 0x10
-	SizeofIfmaMsghdr2 = 0x14
-	SizeofRtMsghdr    = 0x5c
-	SizeofRtMetrics   = 0x38
-)
-
-type IfMsghdr struct {
-	Msglen  uint16
-	Version uint8
-	Type    uint8
-	Addrs   int32
-	Flags   int32
-	Index   uint16
-	Data    IfData
-}
-
-type IfData struct {
-	Type       uint8
-	Typelen    uint8
-	Physical   uint8
-	Addrlen    uint8
-	Hdrlen     uint8
-	Recvquota  uint8
-	Xmitquota  uint8
-	Unused1    uint8
-	Mtu        uint32
-	Metric     uint32
-	Baudrate   uint32
-	Ipackets   uint32
-	Ierrors    uint32
-	Opackets   uint32
-	Oerrors    uint32
-	Collisions uint32
-	Ibytes     uint32
-	Obytes     uint32
-	Imcasts    uint32
-	Omcasts    uint32
-	Iqdrops    uint32
-	Noproto    uint32
-	Recvtiming uint32
-	Xmittiming uint32
-	Lastchange Timeval
-	Unused2    uint32
-	Hwassist   uint32
-	Reserved1  uint32
-	Reserved2  uint32
-}
-
-type IfaMsghdr struct {
-	Msglen  uint16
-	Version uint8
-	Type    uint8
-	Addrs   int32
-	Flags   int32
-	Index   uint16
-	Metric  int32
-}
-
-type IfmaMsghdr struct {
-	Msglen  uint16
-	Version uint8
-	Type    uint8
-	Addrs   int32
-	Flags   int32
-	Index   uint16
-	_       [2]byte
-}
-
-type IfmaMsghdr2 struct {
-	Msglen   uint16
-	Version  uint8
-	Type     uint8
-	Addrs    int32
-	Flags    int32
-	Index    uint16
-	Refcount int32
-}
-
-type RtMsghdr struct {
-	Msglen  uint16
-	Version uint8
-	Type    uint8
-	Index   uint16
-	Flags   int32
-	Addrs   int32
-	Pid     int32
-	Seq     int32
-	Errno   int32
-	Use     int32
-	Inits   uint32
-	Rmx     RtMetrics
-}
-
-type RtMetrics struct {
-	Locks    uint32
-	Mtu      uint32
-	Hopcount uint32
-	Expire   int32
-	Recvpipe uint32
-	Sendpipe uint32
-	Ssthresh uint32
-	Rtt      uint32
-	Rttvar   uint32
-	Pksent   uint32
-	State    uint32
-	Filler   [3]uint32
-}
-
-const (
-	SizeofBpfVersion = 0x4
-	SizeofBpfStat    = 0x8
-	SizeofBpfProgram = 0x8
-	SizeofBpfInsn    = 0x8
-	SizeofBpfHdr     = 0x14
-)
-
-type BpfVersion struct {
-	Major uint16
-	Minor uint16
-}
-
-type BpfStat struct {
-	Recv uint32
-	Drop uint32
-}
-
-type BpfProgram struct {
-	Len   uint32
-	Insns *BpfInsn
-}
-
-type BpfInsn struct {
-	Code uint16
-	Jt   uint8
-	Jf   uint8
-	K    uint32
-}
-
-type BpfHdr struct {
-	Tstamp  Timeval
-	Caplen  uint32
-	Datalen uint32
-	Hdrlen  uint16
-	_       [2]byte
-}
-
-type Termios struct {
-	Iflag  uint32
-	Oflag  uint32
-	Cflag  uint32
-	Lflag  uint32
-	Cc     [20]uint8
-	Ispeed uint32
-	Ospeed uint32
-}
-
-type Winsize struct {
-	Row    uint16
-	Col    uint16
-	Xpixel uint16
-	Ypixel uint16
-}
-
-const (
-	AT_FDCWD            = -0x2
-	AT_REMOVEDIR        = 0x80
-	AT_SYMLINK_FOLLOW   = 0x40
-	AT_SYMLINK_NOFOLLOW = 0x20
-)
-
-type PollFd struct {
-	Fd      int32
-	Events  int16
-	Revents int16
-}
-
-const (
-	POLLERR    = 0x8
-	POLLHUP    = 0x10
-	POLLIN     = 0x1
-	POLLNVAL   = 0x20
-	POLLOUT    = 0x4
-	POLLPRI    = 0x2
-	POLLRDBAND = 0x80
-	POLLRDNORM = 0x40
-	POLLWRBAND = 0x100
-	POLLWRNORM = 0x4
-)
-
-type Utsname struct {
-	Sysname  [256]byte
-	Nodename [256]byte
-	Release  [256]byte
-	Version  [256]byte
-	Machine  [256]byte
-}
-
-const SizeofClockinfo = 0x14
-
-type Clockinfo struct {
-	Hz      int32
-	Tick    int32
-	Tickadj int32
-	Stathz  int32
-	Profhz  int32
-}
-
-type CtlInfo struct {
-	Id   uint32
-	Name [96]byte
-}
diff --git a/src/cmd/vendor/golang.org/x/sys/unix/ztypes_darwin_arm.go b/src/cmd/vendor/golang.org/x/sys/unix/ztypes_darwin_arm.go
deleted file mode 100644
index eef5133857..0000000000
--- a/src/cmd/vendor/golang.org/x/sys/unix/ztypes_darwin_arm.go
+++ /dev/null
@@ -1,524 +0,0 @@
-// cgo -godefs types_darwin.go | go run mkpost.go
-// Code generated by the command above; see README.md. DO NOT EDIT.
-
-//go:build arm && darwin
-// +build arm,darwin
-
-package unix
-
-const (
-	SizeofPtr      = 0x4
-	SizeofShort    = 0x2
-	SizeofInt      = 0x4
-	SizeofLong     = 0x4
-	SizeofLongLong = 0x8
-)
-
-type (
-	_C_short     int16
-	_C_int       int32
-	_C_long      int32
-	_C_long_long int64
-)
-
-type Timespec struct {
-	Sec  int32
-	Nsec int32
-}
-
-type Timeval struct {
-	Sec  int32
-	Usec int32
-}
-
-type Timeval32 struct{}
-
-type Rusage struct {
-	Utime    Timeval
-	Stime    Timeval
-	Maxrss   int32
-	Ixrss    int32
-	Idrss    int32
-	Isrss    int32
-	Minflt   int32
-	Majflt   int32
-	Nswap    int32
-	Inblock  int32
-	Oublock  int32
-	Msgsnd   int32
-	Msgrcv   int32
-	Nsignals int32
-	Nvcsw    int32
-	Nivcsw   int32
-}
-
-type Rlimit struct {
-	Cur uint64
-	Max uint64
-}
-
-type _Gid_t uint32
-
-type Stat_t struct {
-	Dev     int32
-	Mode    uint16
-	Nlink   uint16
-	Ino     uint64
-	Uid     uint32
-	Gid     uint32
-	Rdev    int32
-	Atim    Timespec
-	Mtim    Timespec
-	Ctim    Timespec
-	Btim    Timespec
-	Size    int64
-	Blocks  int64
-	Blksize int32
-	Flags   uint32
-	Gen     uint32
-	Lspare  int32
-	Qspare  [2]int64
-}
-
-type Statfs_t struct {
-	Bsize       uint32
-	Iosize      int32
-	Blocks      uint64
-	Bfree       uint64
-	Bavail      uint64
-	Files       uint64
-	Ffree       uint64
-	Fsid        Fsid
-	Owner       uint32
-	Type        uint32
-	Flags       uint32
-	Fssubtype   uint32
-	Fstypename  [16]byte
-	Mntonname   [1024]byte
-	Mntfromname [1024]byte
-	Reserved    [8]uint32
-}
-
-type Flock_t struct {
-	Start  int64
-	Len    int64
-	Pid    int32
-	Type   int16
-	Whence int16
-}
-
-type Fstore_t struct {
-	Flags      uint32
-	Posmode    int32
-	Offset     int64
-	Length     int64
-	Bytesalloc int64
-}
-
-type Radvisory_t struct {
-	Offset int64
-	Count  int32
-}
-
-type Fbootstraptransfer_t struct {
-	Offset int64
-	Length uint32
-	Buffer *byte
-}
-
-type Log2phys_t struct {
-	Flags       uint32
-	Contigbytes int64
-	Devoffset   int64
-}
-
-type Fsid struct {
-	Val [2]int32
-}
-
-type Dirent struct {
-	Ino     uint64
-	Seekoff uint64
-	Reclen  uint16
-	Namlen  uint16
-	Type    uint8
-	Name    [1024]int8
-	_       [3]byte
-}
-
-const (
-	PathMax = 0x400
-)
-
-type RawSockaddrInet4 struct {
-	Len    uint8
-	Family uint8
-	Port   uint16
-	Addr   [4]byte /* in_addr */
-	Zero   [8]int8
-}
-
-type RawSockaddrInet6 struct {
-	Len      uint8
-	Family   uint8
-	Port     uint16
-	Flowinfo uint32
-	Addr     [16]byte /* in6_addr */
-	Scope_id uint32
-}
-
-type RawSockaddrUnix struct {
-	Len    uint8
-	Family uint8
-	Path   [104]int8
-}
-
-type RawSockaddrDatalink struct {
-	Len    uint8
-	Family uint8
-	Index  uint16
-	Type   uint8
-	Nlen   uint8
-	Alen   uint8
-	Slen   uint8
-	Data   [12]int8
-}
-
-type RawSockaddr struct {
-	Len    uint8
-	Family uint8
-	Data   [14]int8
-}
-
-type RawSockaddrAny struct {
-	Addr RawSockaddr
-	Pad  [92]int8
-}
-
-type RawSockaddrCtl struct {
-	Sc_len      uint8
-	Sc_family   uint8
-	Ss_sysaddr  uint16
-	Sc_id       uint32
-	Sc_unit     uint32
-	Sc_reserved [5]uint32
-}
-
-type _Socklen uint32
-
-type Linger struct {
-	Onoff  int32
-	Linger int32
-}
-
-type Iovec struct {
-	Base *byte
-	Len  uint32
-}
-
-type IPMreq struct {
-	Multiaddr [4]byte /* in_addr */
-	Interface [4]byte /* in_addr */
-}
-
-type IPMreqn struct {
-	Multiaddr [4]byte /* in_addr */
-	Address   [4]byte /* in_addr */
-	Ifindex   int32
-}
-
-type IPv6Mreq struct {
-	Multiaddr [16]byte /* in6_addr */
-	Interface uint32
-}
-
-type Msghdr struct {
-	Name       *byte
-	Namelen    uint32
-	Iov        *Iovec
-	Iovlen     int32
-	Control    *byte
-	Controllen uint32
-	Flags      int32
-}
-
-type Cmsghdr struct {
-	Len   uint32
-	Level int32
-	Type  int32
-}
-
-type Inet4Pktinfo struct {
-	Ifindex  uint32
-	Spec_dst [4]byte /* in_addr */
-	Addr     [4]byte /* in_addr */
-}
-
-type Inet6Pktinfo struct {
-	Addr    [16]byte /* in6_addr */
-	Ifindex uint32
-}
-
-type IPv6MTUInfo struct {
-	Addr RawSockaddrInet6
-	Mtu  uint32
-}
-
-type ICMPv6Filter struct {
-	Filt [8]uint32
-}
-
-const (
-	SizeofSockaddrInet4    = 0x10
-	SizeofSockaddrInet6    = 0x1c
-	SizeofSockaddrAny      = 0x6c
-	SizeofSockaddrUnix     = 0x6a
-	SizeofSockaddrDatalink = 0x14
-	SizeofSockaddrCtl      = 0x20
-	SizeofLinger           = 0x8
-	SizeofIovec            = 0x8
-	SizeofIPMreq           = 0x8
-	SizeofIPMreqn          = 0xc
-	SizeofIPv6Mreq         = 0x14
-	SizeofMsghdr           = 0x1c
-	SizeofCmsghdr          = 0xc
-	SizeofInet4Pktinfo     = 0xc
-	SizeofInet6Pktinfo     = 0x14
-	SizeofIPv6MTUInfo      = 0x20
-	SizeofICMPv6Filter     = 0x20
-)
-
-const (
-	PTRACE_TRACEME = 0x0
-	PTRACE_CONT    = 0x7
-	PTRACE_KILL    = 0x8
-)
-
-type Kevent_t struct {
-	Ident  uint32
-	Filter int16
-	Flags  uint16
-	Fflags uint32
-	Data   int32
-	Udata  *byte
-}
-
-type FdSet struct {
-	Bits [32]int32
-}
-
-const (
-	SizeofIfMsghdr    = 0x70
-	SizeofIfData      = 0x60
-	SizeofIfaMsghdr   = 0x14
-	SizeofIfmaMsghdr  = 0x10
-	SizeofIfmaMsghdr2 = 0x14
-	SizeofRtMsghdr    = 0x5c
-	SizeofRtMetrics   = 0x38
-)
-
-type IfMsghdr struct {
-	Msglen  uint16
-	Version uint8
-	Type    uint8
-	Addrs   int32
-	Flags   int32
-	Index   uint16
-	Data    IfData
-}
-
-type IfData struct {
-	Type       uint8
-	Typelen    uint8
-	Physical   uint8
-	Addrlen    uint8
-	Hdrlen     uint8
-	Recvquota  uint8
-	Xmitquota  uint8
-	Unused1    uint8
-	Mtu        uint32
-	Metric     uint32
-	Baudrate   uint32
-	Ipackets   uint32
-	Ierrors    uint32
-	Opackets   uint32
-	Oerrors    uint32
-	Collisions uint32
-	Ibytes     uint32
-	Obytes     uint32
-	Imcasts    uint32
-	Omcasts    uint32
-	Iqdrops    uint32
-	Noproto    uint32
-	Recvtiming uint32
-	Xmittiming uint32
-	Lastchange Timeval
-	Unused2    uint32
-	Hwassist   uint32
-	Reserved1  uint32
-	Reserved2  uint32
-}
-
-type IfaMsghdr struct {
-	Msglen  uint16
-	Version uint8
-	Type    uint8
-	Addrs   int32
-	Flags   int32
-	Index   uint16
-	Metric  int32
-}
-
-type IfmaMsghdr struct {
-	Msglen  uint16
-	Version uint8
-	Type    uint8
-	Addrs   int32
-	Flags   int32
-	Index   uint16
-	_       [2]byte
-}
-
-type IfmaMsghdr2 struct {
-	Msglen   uint16
-	Version  uint8
-	Type     uint8
-	Addrs    int32
-	Flags    int32
-	Index    uint16
-	Refcount int32
-}
-
-type RtMsghdr struct {
-	Msglen  uint16
-	Version uint8
-	Type    uint8
-	Index   uint16
-	Flags   int32
-	Addrs   int32
-	Pid     int32
-	Seq     int32
-	Errno   int32
-	Use     int32
-	Inits   uint32
-	Rmx     RtMetrics
-}
-
-type RtMetrics struct {
-	Locks    uint32
-	Mtu      uint32
-	Hopcount uint32
-	Expire   int32
-	Recvpipe uint32
-	Sendpipe uint32
-	Ssthresh uint32
-	Rtt      uint32
-	Rttvar   uint32
-	Pksent   uint32
-	State    uint32
-	Filler   [3]uint32
-}
-
-const (
-	SizeofBpfVersion = 0x4
-	SizeofBpfStat    = 0x8
-	SizeofBpfProgram = 0x8
-	SizeofBpfInsn    = 0x8
-	SizeofBpfHdr     = 0x14
-)
-
-type BpfVersion struct {
-	Major uint16
-	Minor uint16
-}
-
-type BpfStat struct {
-	Recv uint32
-	Drop uint32
-}
-
-type BpfProgram struct {
-	Len   uint32
-	Insns *BpfInsn
-}
-
-type BpfInsn struct {
-	Code uint16
-	Jt   uint8
-	Jf   uint8
-	K    uint32
-}
-
-type BpfHdr struct {
-	Tstamp  Timeval
-	Caplen  uint32
-	Datalen uint32
-	Hdrlen  uint16
-	_       [2]byte
-}
-
-type Termios struct {
-	Iflag  uint32
-	Oflag  uint32
-	Cflag  uint32
-	Lflag  uint32
-	Cc     [20]uint8
-	Ispeed uint32
-	Ospeed uint32
-}
-
-type Winsize struct {
-	Row    uint16
-	Col    uint16
-	Xpixel uint16
-	Ypixel uint16
-}
-
-const (
-	AT_FDCWD            = -0x2
-	AT_REMOVEDIR        = 0x80
-	AT_SYMLINK_FOLLOW   = 0x40
-	AT_SYMLINK_NOFOLLOW = 0x20
-)
-
-type PollFd struct {
-	Fd      int32
-	Events  int16
-	Revents int16
-}
-
-const (
-	POLLERR    = 0x8
-	POLLHUP    = 0x10
-	POLLIN     = 0x1
-	POLLNVAL   = 0x20
-	POLLOUT    = 0x4
-	POLLPRI    = 0x2
-	POLLRDBAND = 0x80
-	POLLRDNORM = 0x40
-	POLLWRBAND = 0x100
-	POLLWRNORM = 0x4
-)
-
-type Utsname struct {
-	Sysname  [256]byte
-	Nodename [256]byte
-	Release  [256]byte
-	Version  [256]byte
-	Machine  [256]byte
-}
-
-const SizeofClockinfo = 0x14
-
-type Clockinfo struct {
-	Hz      int32
-	Tick    int32
-	Tickadj int32
-	Stathz  int32
-	Profhz  int32
-}
-
-type CtlInfo struct {
-	Id   uint32
-	Name [96]byte
-}
diff --git a/src/cmd/vendor/golang.org/x/sys/windows/empty.s b/src/cmd/vendor/golang.org/x/sys/windows/empty.s
index 69309e4da5..fdbbbcd317 100644
--- a/src/cmd/vendor/golang.org/x/sys/windows/empty.s
+++ b/src/cmd/vendor/golang.org/x/sys/windows/empty.s
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build !go1.12
 // +build !go1.12
 
 // This file is here to allow bodyless functions with go:linkname for Go 1.11
diff --git a/src/cmd/vendor/golang.org/x/tools/go/analysis/passes/printf/printf.go b/src/cmd/vendor/golang.org/x/tools/go/analysis/passes/printf/printf.go
index ddad4c796c..822820f06e 100644
--- a/src/cmd/vendor/golang.org/x/tools/go/analysis/passes/printf/printf.go
+++ b/src/cmd/vendor/golang.org/x/tools/go/analysis/passes/printf/printf.go
@@ -590,7 +590,7 @@ func checkPrintf(pass *analysis.Pass, kind Kind, call *ast.CallExpr, fn *types.F
 		}
 		if state.verb == 'w' {
 			if kind != KindErrorf {
-				pass.Reportf(call.Pos(), "%s call has error-wrapping directive %%w", state.name)
+				pass.Reportf(call.Pos(), "%s call has error-wrapping directive %%w, which is only supported by Errorf", state.name)
 				return
 			}
 			if anyW {
diff --git a/src/cmd/vendor/golang.org/x/tools/go/analysis/passes/sigchanyzer/sigchanyzer.go b/src/cmd/vendor/golang.org/x/tools/go/analysis/passes/sigchanyzer/sigchanyzer.go
index b00aa7e144..0d6c8ebf16 100644
--- a/src/cmd/vendor/golang.org/x/tools/go/analysis/passes/sigchanyzer/sigchanyzer.go
+++ b/src/cmd/vendor/golang.org/x/tools/go/analysis/passes/sigchanyzer/sigchanyzer.go
@@ -59,12 +59,19 @@ func run(pass *analysis.Pass) (interface{}, error) {
 		if chanDecl == nil || len(chanDecl.Args) != 1 {
 			return
 		}
-		chanDecl.Args = append(chanDecl.Args, &ast.BasicLit{
+
+		// Make a copy of the channel's declaration to avoid
+		// mutating the AST. See https://golang.org/issue/46129.
+		chanDeclCopy := &ast.CallExpr{}
+		*chanDeclCopy = *chanDecl
+		chanDeclCopy.Args = append([]ast.Expr(nil), chanDecl.Args...)
+		chanDeclCopy.Args = append(chanDeclCopy.Args, &ast.BasicLit{
 			Kind:  token.INT,
 			Value: "1",
 		})
+
 		var buf bytes.Buffer
-		if err := format.Node(&buf, token.NewFileSet(), chanDecl); err != nil {
+		if err := format.Node(&buf, token.NewFileSet(), chanDeclCopy); err != nil {
 			return
 		}
 		pass.Report(analysis.Diagnostic{
diff --git a/src/cmd/vendor/golang.org/x/tools/go/analysis/passes/stdmethods/stdmethods.go b/src/cmd/vendor/golang.org/x/tools/go/analysis/passes/stdmethods/stdmethods.go
index 856c6ae0d8..64a28ac0b9 100644
--- a/src/cmd/vendor/golang.org/x/tools/go/analysis/passes/stdmethods/stdmethods.go
+++ b/src/cmd/vendor/golang.org/x/tools/go/analysis/passes/stdmethods/stdmethods.go
@@ -61,10 +61,12 @@ var Analyzer = &analysis.Analyzer{
 // we let it go. But if it does have a fmt.ScanState, then the
 // rest has to match.
 var canonicalMethods = map[string]struct{ args, results []string }{
+	"As": {[]string{"interface{}"}, []string{"bool"}}, // errors.As
 	// "Flush": {{}, {"error"}}, // http.Flusher and jpeg.writer conflict
 	"Format":        {[]string{"=fmt.State", "rune"}, []string{}},                      // fmt.Formatter
 	"GobDecode":     {[]string{"[]byte"}, []string{"error"}},                           // gob.GobDecoder
 	"GobEncode":     {[]string{}, []string{"[]byte", "error"}},                         // gob.GobEncoder
+	"Is":            {[]string{"error"}, []string{"bool"}},                             // errors.Is
 	"MarshalJSON":   {[]string{}, []string{"[]byte", "error"}},                         // json.Marshaler
 	"MarshalXML":    {[]string{"*xml.Encoder", "xml.StartElement"}, []string{"error"}}, // xml.Marshaler
 	"ReadByte":      {[]string{}, []string{"byte", "error"}},                           // io.ByteReader
@@ -76,6 +78,7 @@ var canonicalMethods = map[string]struct{ args, results []string }{
 	"UnmarshalXML":  {[]string{"*xml.Decoder", "xml.StartElement"}, []string{"error"}}, // xml.Unmarshaler
 	"UnreadByte":    {[]string{}, []string{"error"}},
 	"UnreadRune":    {[]string{}, []string{"error"}},
+	"Unwrap":        {[]string{}, []string{"error"}},                      // errors.Unwrap
 	"WriteByte":     {[]string{"byte"}, []string{"error"}},                // jpeg.writer (matching bufio.Writer)
 	"WriteTo":       {[]string{"=io.Writer"}, []string{"int64", "error"}}, // io.WriterTo
 }
@@ -123,6 +126,14 @@ func canonicalMethod(pass *analysis.Pass, id *ast.Ident) {
 		return
 	}
 
+	// Special case: Is, As and Unwrap only apply when type
+	// implements error.
+	if id.Name == "Is" || id.Name == "As" || id.Name == "Unwrap" {
+		if recv := sign.Recv(); recv == nil || !implementsError(recv.Type()) {
+			return
+		}
+	}
+
 	// Do the =s (if any) all match?
 	if !matchParams(pass, expect.args, args, "=") || !matchParams(pass, expect.results, results, "=") {
 		return
@@ -185,3 +196,9 @@ func matchParamType(expect string, actual types.Type) bool {
 	// Overkill but easy.
 	return typeString(actual) == expect
 }
+
+var errorType = types.Universe.Lookup("error").Type().Underlying().(*types.Interface)
+
+func implementsError(actual types.Type) bool {
+	return types.Implements(actual, errorType)
+}
diff --git a/src/cmd/vendor/modules.txt b/src/cmd/vendor/modules.txt
index 6b19ec3aea..34dbdaf5dd 100644
--- a/src/cmd/vendor/modules.txt
+++ b/src/cmd/vendor/modules.txt
@@ -1,4 +1,4 @@
-# github.com/google/pprof v0.0.0-20210226084205-cbba55b83ad5
+# github.com/google/pprof v0.0.0-20210506205249-923b5ab0fc1a
 ## explicit; go 1.14
 github.com/google/pprof/driver
 github.com/google/pprof/internal/binutils
@@ -28,7 +28,7 @@ golang.org/x/arch/x86/x86asm
 ## explicit; go 1.17
 golang.org/x/crypto/ed25519
 golang.org/x/crypto/ed25519/internal/edwards25519
-# golang.org/x/mod v0.4.3-0.20210504181020-67f1c1edc27a
+# golang.org/x/mod v0.4.3-0.20210608190319-0f08993efd8a
 ## explicit; go 1.17
 golang.org/x/mod/internal/lazyregexp
 golang.org/x/mod/modfile
@@ -39,7 +39,7 @@ golang.org/x/mod/sumdb/dirhash
 golang.org/x/mod/sumdb/note
 golang.org/x/mod/sumdb/tlog
 golang.org/x/mod/zip
-# golang.org/x/sys v0.0.0-20210503173754-0981d6026fa6
+# golang.org/x/sys v0.0.0-20210511113859-b0526f3d8744
 ## explicit; go 1.17
 golang.org/x/sys/internal/unsafeheader
 golang.org/x/sys/plan9
@@ -48,7 +48,7 @@ golang.org/x/sys/windows
 # golang.org/x/term v0.0.0-20210503060354-a79de5458b56
 ## explicit; go 1.17
 golang.org/x/term
-# golang.org/x/tools v0.1.1-0.20210505014545-7cab0ef2e9a5
+# golang.org/x/tools v0.1.2-0.20210519160823-49064d2332f9
 ## explicit; go 1.17
 golang.org/x/tools/cover
 golang.org/x/tools/go/analysis
diff --git a/src/cmd/vet/main.go b/src/cmd/vet/main.go
index a33bba2466..7da8606ece 100644
--- a/src/cmd/vet/main.go
+++ b/src/cmd/vet/main.go
@@ -1,3 +1,7 @@
+// Copyright 2012 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
 package main
 
 import (
diff --git a/src/cmd/vet/testdata/copylock/copylock.go b/src/cmd/vet/testdata/copylock/copylock.go
index 8079cf3248..7cfafe6408 100644
--- a/src/cmd/vet/testdata/copylock/copylock.go
+++ b/src/cmd/vet/testdata/copylock/copylock.go
@@ -1,3 +1,7 @@
+// Copyright 2018 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
 package copylock
 
 import "sync"
diff --git a/src/cmd/vet/testdata/httpresponse/httpresponse.go b/src/cmd/vet/testdata/httpresponse/httpresponse.go
index 6141f6e06d..98e394a271 100644
--- a/src/cmd/vet/testdata/httpresponse/httpresponse.go
+++ b/src/cmd/vet/testdata/httpresponse/httpresponse.go
@@ -1,3 +1,7 @@
+// Copyright 2018 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
 package httpresponse
 
 import (
diff --git a/src/cmd/vet/testdata/testingpkg/tests.go b/src/cmd/vet/testdata/testingpkg/tests.go
index 69d29d3c6c..8f4674d33c 100644
--- a/src/cmd/vet/testdata/testingpkg/tests.go
+++ b/src/cmd/vet/testdata/testingpkg/tests.go
@@ -1 +1,5 @@
+// Copyright 2018 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
 package testdata
diff --git a/src/cmd/vet/testdata/testingpkg/tests_test.go b/src/cmd/vet/testdata/testingpkg/tests_test.go
index 09bb98d980..815dcc8a95 100644
--- a/src/cmd/vet/testdata/testingpkg/tests_test.go
+++ b/src/cmd/vet/testdata/testingpkg/tests_test.go
@@ -1,3 +1,7 @@
+// Copyright 2018 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
 package testdata
 
 func Example_BadSuffix() {} // ERROR "Example_BadSuffix has malformed example suffix: BadSuffix"
diff --git a/src/crypto/cipher/xor_ppc64x.s b/src/crypto/cipher/xor_ppc64x.s
index 4cef31d0ee..2ba6d9639c 100644
--- a/src/crypto/cipher/xor_ppc64x.s
+++ b/src/crypto/cipher/xor_ppc64x.s
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build ppc64 || ppc64le
 // +build ppc64 ppc64le
 
 #include "textflag.h"
diff --git a/src/crypto/ed25519/internal/edwards25519/field/fe_amd64.go b/src/crypto/ed25519/internal/edwards25519/field/fe_amd64.go
index 44dc8e8caf..8fe583939f 100644
--- a/src/crypto/ed25519/internal/edwards25519/field/fe_amd64.go
+++ b/src/crypto/ed25519/internal/edwards25519/field/fe_amd64.go
@@ -1,5 +1,6 @@
 // Code generated by command: go run fe_amd64_asm.go -out ../fe_amd64.s -stubs ../fe_amd64.go -pkg field. DO NOT EDIT.
 
+//go:build amd64 && gc && !purego
 // +build amd64,gc,!purego
 
 package field
diff --git a/src/crypto/elliptic/elliptic.go b/src/crypto/elliptic/elliptic.go
index f93dc16419..f072960bfe 100644
--- a/src/crypto/elliptic/elliptic.go
+++ b/src/crypto/elliptic/elliptic.go
@@ -40,6 +40,15 @@ type Curve interface {
 	ScalarBaseMult(k []byte) (x, y *big.Int)
 }
 
+func matchesSpecificCurve(params *CurveParams, available ...Curve) (Curve, bool) {
+	for _, c := range available {
+		if params == c.Params() {
+			return c, true
+		}
+	}
+	return nil, false
+}
+
 // CurveParams contains the parameters of an elliptic curve and also provides
 // a generic, non-constant time implementation of Curve.
 type CurveParams struct {
@@ -71,6 +80,12 @@ func (curve *CurveParams) polynomial(x *big.Int) *big.Int {
 }
 
 func (curve *CurveParams) IsOnCurve(x, y *big.Int) bool {
+	// If there is a dedicated constant-time implementation for this curve operation,
+	// use that instead of the generic one.
+	if specific, ok := matchesSpecificCurve(curve, p224, p521); ok {
+		return specific.IsOnCurve(x, y)
+	}
+
 	// y² = x³ - 3x + b
 	y2 := new(big.Int).Mul(y, y)
 	y2.Mod(y2, curve.P)
@@ -108,6 +123,12 @@ func (curve *CurveParams) affineFromJacobian(x, y, z *big.Int) (xOut, yOut *big.
 }
 
 func (curve *CurveParams) Add(x1, y1, x2, y2 *big.Int) (*big.Int, *big.Int) {
+	// If there is a dedicated constant-time implementation for this curve operation,
+	// use that instead of the generic one.
+	if specific, ok := matchesSpecificCurve(curve, p224, p521); ok {
+		return specific.Add(x1, y1, x2, y2)
+	}
+
 	z1 := zForAffine(x1, y1)
 	z2 := zForAffine(x2, y2)
 	return curve.affineFromJacobian(curve.addJacobian(x1, y1, z1, x2, y2, z2))
@@ -192,6 +213,12 @@ func (curve *CurveParams) addJacobian(x1, y1, z1, x2, y2, z2 *big.Int) (*big.Int
 }
 
 func (curve *CurveParams) Double(x1, y1 *big.Int) (*big.Int, *big.Int) {
+	// If there is a dedicated constant-time implementation for this curve operation,
+	// use that instead of the generic one.
+	if specific, ok := matchesSpecificCurve(curve, p224, p521); ok {
+		return specific.Double(x1, y1)
+	}
+
 	z1 := zForAffine(x1, y1)
 	return curve.affineFromJacobian(curve.doubleJacobian(x1, y1, z1))
 }
@@ -258,6 +285,12 @@ func (curve *CurveParams) doubleJacobian(x, y, z *big.Int) (*big.Int, *big.Int,
 }
 
 func (curve *CurveParams) ScalarMult(Bx, By *big.Int, k []byte) (*big.Int, *big.Int) {
+	// If there is a dedicated constant-time implementation for this curve operation,
+	// use that instead of the generic one.
+	if specific, ok := matchesSpecificCurve(curve, p224, p256, p521); ok {
+		return specific.ScalarMult(Bx, By, k)
+	}
+
 	Bz := new(big.Int).SetInt64(1)
 	x, y, z := new(big.Int), new(big.Int), new(big.Int)
 
@@ -275,6 +308,12 @@ func (curve *CurveParams) ScalarMult(Bx, By *big.Int, k []byte) (*big.Int, *big.
 }
 
 func (curve *CurveParams) ScalarBaseMult(k []byte) (*big.Int, *big.Int) {
+	// If there is a dedicated constant-time implementation for this curve operation,
+	// use that instead of the generic one.
+	if specific, ok := matchesSpecificCurve(curve, p224, p256, p521); ok {
+		return specific.ScalarBaseMult(k)
+	}
+
 	return curve.ScalarMult(curve.Gx, curve.Gy, k)
 }
 
@@ -390,7 +429,6 @@ func UnmarshalCompressed(curve Curve, data []byte) (x, y *big.Int) {
 
 var initonce sync.Once
 var p384 *CurveParams
-var p521 *CurveParams
 
 func initAll() {
 	initP224()
@@ -410,17 +448,6 @@ func initP384() {
 	p384.BitSize = 384
 }
 
-func initP521() {
-	// See FIPS 186-3, section D.2.5
-	p521 = &CurveParams{Name: "P-521"}
-	p521.P, _ = new(big.Int).SetString("6864797660130609714981900799081393217269435300143305409394463459185543183397656052122559640661454554977296311391480858037121987999716643812574028291115057151", 10)
-	p521.N, _ = new(big.Int).SetString("6864797660130609714981900799081393217269435300143305409394463459185543183397655394245057746333217197532963996371363321113864768612440380340372808892707005449", 10)
-	p521.B, _ = new(big.Int).SetString("051953eb9618e1c9a1f929a21a0b68540eea2da725b99b315f3b8b489918ef109e156193951ec7e937b1652c0bd3bb1bf073573df883d2c34f1ef451fd46b503f00", 16)
-	p521.Gx, _ = new(big.Int).SetString("c6858e06b70404e9cd9e3ecb662395b4429c648139053fb521f828af606b4d3dbaa14b5e77efe75928fe1dc127a2ffa8de3348b3c1856a429bf97e7e31c2e5bd66", 16)
-	p521.Gy, _ = new(big.Int).SetString("11839296a789a3bc0045c8a5fb42c7d1bd998f54449579b446817afbd17273e662c97ee72995ef42640c550b9013fad0761353c7086a272c24088be94769fd16650", 16)
-	p521.BitSize = 521
-}
-
 // P256 returns a Curve which implements NIST P-256 (FIPS 186-3, section D.2.3),
 // also known as secp256r1 or prime256v1. The CurveParams.Name of this Curve is
 // "P-256".
@@ -428,7 +455,7 @@ func initP521() {
 // Multiple invocations of this function will return the same value, so it can
 // be used for equality checks and switch statements.
 //
-// The cryptographic operations are implemented using constant-time algorithms.
+// ScalarMult and ScalarBaseMult are implemented using constant-time algorithms.
 func P256() Curve {
 	initonce.Do(initAll)
 	return p256
@@ -452,7 +479,7 @@ func P384() Curve {
 // Multiple invocations of this function will return the same value, so it can
 // be used for equality checks and switch statements.
 //
-// The cryptographic operations do not use constant-time algorithms.
+// The cryptographic operations are implemented using constant-time algorithms.
 func P521() Curve {
 	initonce.Do(initAll)
 	return p521
diff --git a/src/crypto/elliptic/elliptic_test.go b/src/crypto/elliptic/elliptic_test.go
index 0d43b736f9..183861a54b 100644
--- a/src/crypto/elliptic/elliptic_test.go
+++ b/src/crypto/elliptic/elliptic_test.go
@@ -12,19 +12,29 @@ import (
 	"testing"
 )
 
+// genericParamsForCurve returns the dereferenced CurveParams for
+// the specified curve. This is used to avoid the logic for
+// upgrading a curve to it's specific implementation, forcing
+// usage of the generic implementation. This is only relevant
+// for the P224, P256, and P521 curves.
+func genericParamsForCurve(c Curve) *CurveParams {
+	d := *(c.Params())
+	return &d
+}
+
 func testAllCurves(t *testing.T, f func(*testing.T, Curve)) {
 	tests := []struct {
 		name  string
 		curve Curve
 	}{
 		{"P256", P256()},
-		{"P256/Params", P256().Params()},
+		{"P256/Params", genericParamsForCurve(P256())},
 		{"P224", P224()},
-		{"P224/Params", P224().Params()},
+		{"P224/Params", genericParamsForCurve(P224())},
 		{"P384", P384()},
-		{"P384/Params", P384().Params()},
+		{"P384/Params", genericParamsForCurve(P384())},
 		{"P521", P521()},
-		{"P521/Params", P521().Params()},
+		{"P521/Params", genericParamsForCurve(P521())},
 	}
 	if testing.Short() {
 		tests = tests[:1]
diff --git a/src/crypto/elliptic/internal/fiat/Dockerfile b/src/crypto/elliptic/internal/fiat/Dockerfile
new file mode 100644
index 0000000000..7b5ece0e30
--- /dev/null
+++ b/src/crypto/elliptic/internal/fiat/Dockerfile
@@ -0,0 +1,12 @@
+# Copyright 2021 The Go Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style
+# license that can be found in the LICENSE file.
+
+FROM coqorg/coq:8.13.2
+
+RUN git clone https://github.com/mit-plv/fiat-crypto
+RUN cd fiat-crypto && git checkout c076f3550bea2bb7f4cb5766a32594b9e67694f2
+RUN cd fiat-crypto && git submodule update --init --recursive
+RUN cd fiat-crypto && eval $(opam env) && make -j4 standalone-ocaml SKIP_BEDROCK2=1
+
+ENTRYPOINT ["fiat-crypto/src/ExtractionOCaml/unsaturated_solinas"]
diff --git a/src/crypto/elliptic/internal/fiat/README b/src/crypto/elliptic/internal/fiat/README
new file mode 100644
index 0000000000..171f57a327
--- /dev/null
+++ b/src/crypto/elliptic/internal/fiat/README
@@ -0,0 +1,39 @@
+The code in this package was autogenerated by the fiat-crypto project
+at commit c076f3550 from a formally verified model.
+
+    docker build -t fiat-crypto:c076f3550 .
+    docker run fiat-crypto:c076f3550 --lang Go --no-wide-int --cmovznz-by-mul \
+        --internal-static --public-function-case camelCase --public-type-case camelCase \
+        --private-function-case camelCase --private-type-case camelCase \
+        --no-prefix-fiat --package-name fiat --doc-text-before-function-name '' \
+        --doc-prepend-header 'Code generated by Fiat Cryptography. DO NOT EDIT.' \
+        --doc-newline-before-package-declaration p521 64 9 '2^521 - 1' \
+        carry_mul carry_square carry add sub to_bytes from_bytes selectznz \
+        > p521_fiat64.go
+
+It comes under the following license.
+
+    Copyright (c) 2015-2020 The fiat-crypto Authors. All rights reserved.
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions are
+    met:
+
+        1. Redistributions of source code must retain the above copyright
+        notice, this list of conditions and the following disclaimer.
+
+    THIS SOFTWARE IS PROVIDED BY the fiat-crypto authors "AS IS"
+    AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+    THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL Berkeley Software Design,
+    Inc. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+    EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+    PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+    PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+    LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+    NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+    SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+The authors are listed at
+
+    https://github.com/mit-plv/fiat-crypto/blob/master/AUTHORS
diff --git a/src/crypto/elliptic/internal/fiat/p521.go b/src/crypto/elliptic/internal/fiat/p521.go
new file mode 100644
index 0000000000..dc677327e6
--- /dev/null
+++ b/src/crypto/elliptic/internal/fiat/p521.go
@@ -0,0 +1,197 @@
+// Copyright 2021 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package fiat implements prime order fields using formally verified algorithms
+// from the Fiat Cryptography project.
+package fiat
+
+import (
+	"crypto/subtle"
+	"errors"
+)
+
+// P521Element is an integer modulo 2^521 - 1.
+//
+// The zero value is a valid zero element.
+type P521Element struct {
+	// This element has the following bounds, which are tighter than
+	// the output bounds of some operations. Those operations must be
+	// followed by a carry.
+	//
+	// [0x0 ~> 0x400000000000000], [0x0 ~> 0x400000000000000], [0x0 ~> 0x400000000000000],
+	// [0x0 ~> 0x400000000000000], [0x0 ~> 0x400000000000000], [0x0 ~> 0x400000000000000],
+	// [0x0 ~> 0x400000000000000], [0x0 ~> 0x400000000000000], [0x0 ~> 0x200000000000000]
+	x [9]uint64
+}
+
+// One sets e = 1, and returns e.
+func (e *P521Element) One() *P521Element {
+	*e = P521Element{}
+	e.x[0] = 1
+	return e
+}
+
+// Equal returns 1 if e == t, and zero otherwise.
+func (e *P521Element) Equal(t *P521Element) int {
+	eBytes := e.Bytes()
+	tBytes := t.Bytes()
+	return subtle.ConstantTimeCompare(eBytes, tBytes)
+}
+
+var p521ZeroEncoding = new(P521Element).Bytes()
+
+// IsZero returns 1 if e == 0, and zero otherwise.
+func (e *P521Element) IsZero() int {
+	eBytes := e.Bytes()
+	return subtle.ConstantTimeCompare(eBytes, p521ZeroEncoding)
+}
+
+// Set sets e = t, and returns e.
+func (e *P521Element) Set(t *P521Element) *P521Element {
+	e.x = t.x
+	return e
+}
+
+// Bytes returns the 66-byte little-endian encoding of e.
+func (e *P521Element) Bytes() []byte {
+	// This function must be inlined to move the allocation to the parent and
+	// save it from escaping to the heap.
+	var out [66]byte
+	p521ToBytes(&out, &e.x)
+	return out[:]
+}
+
+// SetBytes sets e = v, where v is a little-endian 66-byte encoding, and returns
+// e. If v is not 66 bytes or it encodes a value higher than 2^521 - 1, SetBytes
+// returns nil and an error, and e is unchanged.
+func (e *P521Element) SetBytes(v []byte) (*P521Element, error) {
+	if len(v) != 66 || v[65] > 1 {
+		return nil, errors.New("invalid P-521 field encoding")
+	}
+	var in [66]byte
+	copy(in[:], v)
+	p521FromBytes(&e.x, &in)
+	return e, nil
+}
+
+// Add sets e = t1 + t2, and returns e.
+func (e *P521Element) Add(t1, t2 *P521Element) *P521Element {
+	p521Add(&e.x, &t1.x, &t2.x)
+	p521Carry(&e.x, &e.x)
+	return e
+}
+
+// Sub sets e = t1 - t2, and returns e.
+func (e *P521Element) Sub(t1, t2 *P521Element) *P521Element {
+	p521Sub(&e.x, &t1.x, &t2.x)
+	p521Carry(&e.x, &e.x)
+	return e
+}
+
+// Mul sets e = t1 * t2, and returns e.
+func (e *P521Element) Mul(t1, t2 *P521Element) *P521Element {
+	p521CarryMul(&e.x, &t1.x, &t2.x)
+	return e
+}
+
+// Square sets e = t * t, and returns e.
+func (e *P521Element) Square(t *P521Element) *P521Element {
+	p521CarrySquare(&e.x, &t.x)
+	return e
+}
+
+// Select sets e to a if cond == 1, and to b if cond == 0.
+func (v *P521Element) Select(a, b *P521Element, cond int) *P521Element {
+	p521Selectznz(&v.x, p521Uint1(cond), &b.x, &a.x)
+	return v
+}
+
+// Invert sets e = 1/t, and returns e.
+//
+// If t == 0, Invert returns e = 0.
+func (e *P521Element) Invert(t *P521Element) *P521Element {
+	// Inversion is implemented as exponentiation with exponent p − 2.
+	// The sequence of multiplications and squarings was generated with
+	// github.com/mmcloughlin/addchain v0.2.0.
+
+	var t1, t2 = new(P521Element), new(P521Element)
+
+	// _10 = 2 * 1
+	t1.Square(t)
+
+	// _11 = 1 + _10
+	t1.Mul(t, t1)
+
+	// _1100 = _11 << 2
+	t2.Square(t1)
+	t2.Square(t2)
+
+	// _1111 = _11 + _1100
+	t1.Mul(t1, t2)
+
+	// _11110000 = _1111 << 4
+	t2.Square(t1)
+	for i := 0; i < 3; i++ {
+		t2.Square(t2)
+	}
+
+	// _11111111 = _1111 + _11110000
+	t1.Mul(t1, t2)
+
+	// x16 = _11111111<<8 + _11111111
+	t2.Square(t1)
+	for i := 0; i < 7; i++ {
+		t2.Square(t2)
+	}
+	t1.Mul(t1, t2)
+
+	// x32 = x16<<16 + x16
+	t2.Square(t1)
+	for i := 0; i < 15; i++ {
+		t2.Square(t2)
+	}
+	t1.Mul(t1, t2)
+
+	// x64 = x32<<32 + x32
+	t2.Square(t1)
+	for i := 0; i < 31; i++ {
+		t2.Square(t2)
+	}
+	t1.Mul(t1, t2)
+
+	// x65 = 2*x64 + 1
+	t2.Square(t1)
+	t2.Mul(t2, t)
+
+	// x129 = x65<<64 + x64
+	for i := 0; i < 64; i++ {
+		t2.Square(t2)
+	}
+	t1.Mul(t1, t2)
+
+	// x130 = 2*x129 + 1
+	t2.Square(t1)
+	t2.Mul(t2, t)
+
+	// x259 = x130<<129 + x129
+	for i := 0; i < 129; i++ {
+		t2.Square(t2)
+	}
+	t1.Mul(t1, t2)
+
+	// x260 = 2*x259 + 1
+	t2.Square(t1)
+	t2.Mul(t2, t)
+
+	// x519 = x260<<259 + x259
+	for i := 0; i < 259; i++ {
+		t2.Square(t2)
+	}
+	t1.Mul(t1, t2)
+
+	// return x519<<2 + 1
+	t1.Square(t1)
+	t1.Square(t1)
+	return e.Mul(t1, t)
+}
diff --git a/src/crypto/elliptic/internal/fiat/p521_fiat64.go b/src/crypto/elliptic/internal/fiat/p521_fiat64.go
new file mode 100644
index 0000000000..f86283b587
--- /dev/null
+++ b/src/crypto/elliptic/internal/fiat/p521_fiat64.go
@@ -0,0 +1,1856 @@
+// Code generated by Fiat Cryptography. DO NOT EDIT.
+//
+// Autogenerated: 'fiat-crypto/src/ExtractionOCaml/unsaturated_solinas' --lang Go --no-wide-int --cmovznz-by-mul --internal-static --public-function-case camelCase --public-type-case camelCase --private-function-case camelCase --private-type-case camelCase --no-prefix-fiat --package-name fiat --doc-text-before-function-name '' --doc-prepend-header 'Code generated by Fiat Cryptography. DO NOT EDIT.' --doc-newline-before-package-declaration p521 64 9 '2^521 - 1' carry_mul carry_square carry add sub to_bytes from_bytes selectznz
+//
+// curve description: p521
+//
+// machine_wordsize = 64 (from "64")
+//
+// requested operations: carry_mul, carry_square, carry, add, sub, to_bytes, from_bytes, selectznz
+//
+// n = 9 (from "9")
+//
+// s-c = 2^521 - [(1, 1)] (from "2^521 - 1")
+//
+// tight_bounds_multiplier = 1 (from "")
+//
+//
+//
+// Computed values:
+//
+//   carry_chain = [0, 1, 2, 3, 4, 5, 6, 7, 8, 0, 1]
+//
+//   eval z = z[0] + (z[1] << 58) + (z[2] << 116) + (z[3] << 174) + (z[4] << 232) + (z[5] << 0x122) + (z[6] << 0x15c) + (z[7] << 0x196) + (z[8] << 0x1d0)
+//
+//   bytes_eval z = z[0] + (z[1] << 8) + (z[2] << 16) + (z[3] << 24) + (z[4] << 32) + (z[5] << 40) + (z[6] << 48) + (z[7] << 56) + (z[8] << 64) + (z[9] << 72) + (z[10] << 80) + (z[11] << 88) + (z[12] << 96) + (z[13] << 104) + (z[14] << 112) + (z[15] << 120) + (z[16] << 128) + (z[17] << 136) + (z[18] << 144) + (z[19] << 152) + (z[20] << 160) + (z[21] << 168) + (z[22] << 176) + (z[23] << 184) + (z[24] << 192) + (z[25] << 200) + (z[26] << 208) + (z[27] << 216) + (z[28] << 224) + (z[29] << 232) + (z[30] << 240) + (z[31] << 248) + (z[32] << 256) + (z[33] << 0x108) + (z[34] << 0x110) + (z[35] << 0x118) + (z[36] << 0x120) + (z[37] << 0x128) + (z[38] << 0x130) + (z[39] << 0x138) + (z[40] << 0x140) + (z[41] << 0x148) + (z[42] << 0x150) + (z[43] << 0x158) + (z[44] << 0x160) + (z[45] << 0x168) + (z[46] << 0x170) + (z[47] << 0x178) + (z[48] << 0x180) + (z[49] << 0x188) + (z[50] << 0x190) + (z[51] << 0x198) + (z[52] << 0x1a0) + (z[53] << 0x1a8) + (z[54] << 0x1b0) + (z[55] << 0x1b8) + (z[56] << 0x1c0) + (z[57] << 0x1c8) + (z[58] << 0x1d0) + (z[59] << 0x1d8) + (z[60] << 0x1e0) + (z[61] << 0x1e8) + (z[62] << 0x1f0) + (z[63] << 0x1f8) + (z[64] << 2^9) + (z[65] << 0x208)
+//
+//   balance = [0x7fffffffffffffe, 0x7fffffffffffffe, 0x7fffffffffffffe, 0x7fffffffffffffe, 0x7fffffffffffffe, 0x7fffffffffffffe, 0x7fffffffffffffe, 0x7fffffffffffffe, 0x3fffffffffffffe]
+
+package fiat
+
+import "math/bits"
+
+type p521Uint1 uint8
+type p521Int1 int8
+
+// p521AddcarryxU64 is a thin wrapper around bits.Add64 that uses p521Uint1 rather than uint64
+func p521AddcarryxU64(x uint64, y uint64, carry p521Uint1) (uint64, p521Uint1) {
+	sum, carryOut := bits.Add64(x, y, uint64(carry))
+	return sum, p521Uint1(carryOut)
+}
+
+// p521SubborrowxU64 is a thin wrapper around bits.Sub64 that uses p521Uint1 rather than uint64
+func p521SubborrowxU64(x uint64, y uint64, carry p521Uint1) (uint64, p521Uint1) {
+	sum, carryOut := bits.Sub64(x, y, uint64(carry))
+	return sum, p521Uint1(carryOut)
+}
+
+// p521AddcarryxU58 is an addition with carry.
+//
+// Postconditions:
+//   out1 = (arg1 + arg2 + arg3) mod 2^58
+//   out2 = ⌊(arg1 + arg2 + arg3) / 2^58⌋
+//
+// Input Bounds:
+//   arg1: [0x0 ~> 0x1]
+//   arg2: [0x0 ~> 0x3ffffffffffffff]
+//   arg3: [0x0 ~> 0x3ffffffffffffff]
+// Output Bounds:
+//   out1: [0x0 ~> 0x3ffffffffffffff]
+//   out2: [0x0 ~> 0x1]
+func p521AddcarryxU58(out1 *uint64, out2 *p521Uint1, arg1 p521Uint1, arg2 uint64, arg3 uint64) {
+	x1 := ((uint64(arg1) + arg2) + arg3)
+	x2 := (x1 & 0x3ffffffffffffff)
+	x3 := p521Uint1((x1 >> 58))
+	*out1 = x2
+	*out2 = x3
+}
+
+// p521SubborrowxU58 is a subtraction with borrow.
+//
+// Postconditions:
+//   out1 = (-arg1 + arg2 + -arg3) mod 2^58
+//   out2 = -⌊(-arg1 + arg2 + -arg3) / 2^58⌋
+//
+// Input Bounds:
+//   arg1: [0x0 ~> 0x1]
+//   arg2: [0x0 ~> 0x3ffffffffffffff]
+//   arg3: [0x0 ~> 0x3ffffffffffffff]
+// Output Bounds:
+//   out1: [0x0 ~> 0x3ffffffffffffff]
+//   out2: [0x0 ~> 0x1]
+func p521SubborrowxU58(out1 *uint64, out2 *p521Uint1, arg1 p521Uint1, arg2 uint64, arg3 uint64) {
+	x1 := ((int64(arg2) - int64(arg1)) - int64(arg3))
+	x2 := p521Int1((x1 >> 58))
+	x3 := (uint64(x1) & 0x3ffffffffffffff)
+	*out1 = x3
+	*out2 = (0x0 - p521Uint1(x2))
+}
+
+// p521AddcarryxU57 is an addition with carry.
+//
+// Postconditions:
+//   out1 = (arg1 + arg2 + arg3) mod 2^57
+//   out2 = ⌊(arg1 + arg2 + arg3) / 2^57⌋
+//
+// Input Bounds:
+//   arg1: [0x0 ~> 0x1]
+//   arg2: [0x0 ~> 0x1ffffffffffffff]
+//   arg3: [0x0 ~> 0x1ffffffffffffff]
+// Output Bounds:
+//   out1: [0x0 ~> 0x1ffffffffffffff]
+//   out2: [0x0 ~> 0x1]
+func p521AddcarryxU57(out1 *uint64, out2 *p521Uint1, arg1 p521Uint1, arg2 uint64, arg3 uint64) {
+	x1 := ((uint64(arg1) + arg2) + arg3)
+	x2 := (x1 & 0x1ffffffffffffff)
+	x3 := p521Uint1((x1 >> 57))
+	*out1 = x2
+	*out2 = x3
+}
+
+// p521SubborrowxU57 is a subtraction with borrow.
+//
+// Postconditions:
+//   out1 = (-arg1 + arg2 + -arg3) mod 2^57
+//   out2 = -⌊(-arg1 + arg2 + -arg3) / 2^57⌋
+//
+// Input Bounds:
+//   arg1: [0x0 ~> 0x1]
+//   arg2: [0x0 ~> 0x1ffffffffffffff]
+//   arg3: [0x0 ~> 0x1ffffffffffffff]
+// Output Bounds:
+//   out1: [0x0 ~> 0x1ffffffffffffff]
+//   out2: [0x0 ~> 0x1]
+func p521SubborrowxU57(out1 *uint64, out2 *p521Uint1, arg1 p521Uint1, arg2 uint64, arg3 uint64) {
+	x1 := ((int64(arg2) - int64(arg1)) - int64(arg3))
+	x2 := p521Int1((x1 >> 57))
+	x3 := (uint64(x1) & 0x1ffffffffffffff)
+	*out1 = x3
+	*out2 = (0x0 - p521Uint1(x2))
+}
+
+// p521CmovznzU64 is a single-word conditional move.
+//
+// Postconditions:
+//   out1 = (if arg1 = 0 then arg2 else arg3)
+//
+// Input Bounds:
+//   arg1: [0x0 ~> 0x1]
+//   arg2: [0x0 ~> 0xffffffffffffffff]
+//   arg3: [0x0 ~> 0xffffffffffffffff]
+// Output Bounds:
+//   out1: [0x0 ~> 0xffffffffffffffff]
+func p521CmovznzU64(out1 *uint64, arg1 p521Uint1, arg2 uint64, arg3 uint64) {
+	x1 := (uint64(arg1) * 0xffffffffffffffff)
+	x2 := ((x1 & arg3) | ((^x1) & arg2))
+	*out1 = x2
+}
+
+// p521CarryMul multiplies two field elements and reduces the result.
+//
+// Postconditions:
+//   eval out1 mod m = (eval arg1 * eval arg2) mod m
+//
+// Input Bounds:
+//   arg1: [[0x0 ~> 0xc00000000000000], [0x0 ~> 0xc00000000000000], [0x0 ~> 0xc00000000000000], [0x0 ~> 0xc00000000000000], [0x0 ~> 0xc00000000000000], [0x0 ~> 0xc00000000000000], [0x0 ~> 0xc00000000000000], [0x0 ~> 0xc00000000000000], [0x0 ~> 0x600000000000000]]
+//   arg2: [[0x0 ~> 0xc00000000000000], [0x0 ~> 0xc00000000000000], [0x0 ~> 0xc00000000000000], [0x0 ~> 0xc00000000000000], [0x0 ~> 0xc00000000000000], [0x0 ~> 0xc00000000000000], [0x0 ~> 0xc00000000000000], [0x0 ~> 0xc00000000000000], [0x0 ~> 0x600000000000000]]
+// Output Bounds:
+//   out1: [[0x0 ~> 0x400000000000000], [0x0 ~> 0x400000000000000], [0x0 ~> 0x400000000000000], [0x0 ~> 0x400000000000000], [0x0 ~> 0x400000000000000], [0x0 ~> 0x400000000000000], [0x0 ~> 0x400000000000000], [0x0 ~> 0x400000000000000], [0x0 ~> 0x200000000000000]]
+func p521CarryMul(out1 *[9]uint64, arg1 *[9]uint64, arg2 *[9]uint64) {
+	var x1 uint64
+	var x2 uint64
+	x2, x1 = bits.Mul64(arg1[8], (arg2[8] * 0x2))
+	var x3 uint64
+	var x4 uint64
+	x4, x3 = bits.Mul64(arg1[8], (arg2[7] * 0x2))
+	var x5 uint64
+	var x6 uint64
+	x6, x5 = bits.Mul64(arg1[8], (arg2[6] * 0x2))
+	var x7 uint64
+	var x8 uint64
+	x8, x7 = bits.Mul64(arg1[8], (arg2[5] * 0x2))
+	var x9 uint64
+	var x10 uint64
+	x10, x9 = bits.Mul64(arg1[8], (arg2[4] * 0x2))
+	var x11 uint64
+	var x12 uint64
+	x12, x11 = bits.Mul64(arg1[8], (arg2[3] * 0x2))
+	var x13 uint64
+	var x14 uint64
+	x14, x13 = bits.Mul64(arg1[8], (arg2[2] * 0x2))
+	var x15 uint64
+	var x16 uint64
+	x16, x15 = bits.Mul64(arg1[8], (arg2[1] * 0x2))
+	var x17 uint64
+	var x18 uint64
+	x18, x17 = bits.Mul64(arg1[7], (arg2[8] * 0x2))
+	var x19 uint64
+	var x20 uint64
+	x20, x19 = bits.Mul64(arg1[7], (arg2[7] * 0x2))
+	var x21 uint64
+	var x22 uint64
+	x22, x21 = bits.Mul64(arg1[7], (arg2[6] * 0x2))
+	var x23 uint64
+	var x24 uint64
+	x24, x23 = bits.Mul64(arg1[7], (arg2[5] * 0x2))
+	var x25 uint64
+	var x26 uint64
+	x26, x25 = bits.Mul64(arg1[7], (arg2[4] * 0x2))
+	var x27 uint64
+	var x28 uint64
+	x28, x27 = bits.Mul64(arg1[7], (arg2[3] * 0x2))
+	var x29 uint64
+	var x30 uint64
+	x30, x29 = bits.Mul64(arg1[7], (arg2[2] * 0x2))
+	var x31 uint64
+	var x32 uint64
+	x32, x31 = bits.Mul64(arg1[6], (arg2[8] * 0x2))
+	var x33 uint64
+	var x34 uint64
+	x34, x33 = bits.Mul64(arg1[6], (arg2[7] * 0x2))
+	var x35 uint64
+	var x36 uint64
+	x36, x35 = bits.Mul64(arg1[6], (arg2[6] * 0x2))
+	var x37 uint64
+	var x38 uint64
+	x38, x37 = bits.Mul64(arg1[6], (arg2[5] * 0x2))
+	var x39 uint64
+	var x40 uint64
+	x40, x39 = bits.Mul64(arg1[6], (arg2[4] * 0x2))
+	var x41 uint64
+	var x42 uint64
+	x42, x41 = bits.Mul64(arg1[6], (arg2[3] * 0x2))
+	var x43 uint64
+	var x44 uint64
+	x44, x43 = bits.Mul64(arg1[5], (arg2[8] * 0x2))
+	var x45 uint64
+	var x46 uint64
+	x46, x45 = bits.Mul64(arg1[5], (arg2[7] * 0x2))
+	var x47 uint64
+	var x48 uint64
+	x48, x47 = bits.Mul64(arg1[5], (arg2[6] * 0x2))
+	var x49 uint64
+	var x50 uint64
+	x50, x49 = bits.Mul64(arg1[5], (arg2[5] * 0x2))
+	var x51 uint64
+	var x52 uint64
+	x52, x51 = bits.Mul64(arg1[5], (arg2[4] * 0x2))
+	var x53 uint64
+	var x54 uint64
+	x54, x53 = bits.Mul64(arg1[4], (arg2[8] * 0x2))
+	var x55 uint64
+	var x56 uint64
+	x56, x55 = bits.Mul64(arg1[4], (arg2[7] * 0x2))
+	var x57 uint64
+	var x58 uint64
+	x58, x57 = bits.Mul64(arg1[4], (arg2[6] * 0x2))
+	var x59 uint64
+	var x60 uint64
+	x60, x59 = bits.Mul64(arg1[4], (arg2[5] * 0x2))
+	var x61 uint64
+	var x62 uint64
+	x62, x61 = bits.Mul64(arg1[3], (arg2[8] * 0x2))
+	var x63 uint64
+	var x64 uint64
+	x64, x63 = bits.Mul64(arg1[3], (arg2[7] * 0x2))
+	var x65 uint64
+	var x66 uint64
+	x66, x65 = bits.Mul64(arg1[3], (arg2[6] * 0x2))
+	var x67 uint64
+	var x68 uint64
+	x68, x67 = bits.Mul64(arg1[2], (arg2[8] * 0x2))
+	var x69 uint64
+	var x70 uint64
+	x70, x69 = bits.Mul64(arg1[2], (arg2[7] * 0x2))
+	var x71 uint64
+	var x72 uint64
+	x72, x71 = bits.Mul64(arg1[1], (arg2[8] * 0x2))
+	var x73 uint64
+	var x74 uint64
+	x74, x73 = bits.Mul64(arg1[8], arg2[0])
+	var x75 uint64
+	var x76 uint64
+	x76, x75 = bits.Mul64(arg1[7], arg2[1])
+	var x77 uint64
+	var x78 uint64
+	x78, x77 = bits.Mul64(arg1[7], arg2[0])
+	var x79 uint64
+	var x80 uint64
+	x80, x79 = bits.Mul64(arg1[6], arg2[2])
+	var x81 uint64
+	var x82 uint64
+	x82, x81 = bits.Mul64(arg1[6], arg2[1])
+	var x83 uint64
+	var x84 uint64
+	x84, x83 = bits.Mul64(arg1[6], arg2[0])
+	var x85 uint64
+	var x86 uint64
+	x86, x85 = bits.Mul64(arg1[5], arg2[3])
+	var x87 uint64
+	var x88 uint64
+	x88, x87 = bits.Mul64(arg1[5], arg2[2])
+	var x89 uint64
+	var x90 uint64
+	x90, x89 = bits.Mul64(arg1[5], arg2[1])
+	var x91 uint64
+	var x92 uint64
+	x92, x91 = bits.Mul64(arg1[5], arg2[0])
+	var x93 uint64
+	var x94 uint64
+	x94, x93 = bits.Mul64(arg1[4], arg2[4])
+	var x95 uint64
+	var x96 uint64
+	x96, x95 = bits.Mul64(arg1[4], arg2[3])
+	var x97 uint64
+	var x98 uint64
+	x98, x97 = bits.Mul64(arg1[4], arg2[2])
+	var x99 uint64
+	var x100 uint64
+	x100, x99 = bits.Mul64(arg1[4], arg2[1])
+	var x101 uint64
+	var x102 uint64
+	x102, x101 = bits.Mul64(arg1[4], arg2[0])
+	var x103 uint64
+	var x104 uint64
+	x104, x103 = bits.Mul64(arg1[3], arg2[5])
+	var x105 uint64
+	var x106 uint64
+	x106, x105 = bits.Mul64(arg1[3], arg2[4])
+	var x107 uint64
+	var x108 uint64
+	x108, x107 = bits.Mul64(arg1[3], arg2[3])
+	var x109 uint64
+	var x110 uint64
+	x110, x109 = bits.Mul64(arg1[3], arg2[2])
+	var x111 uint64
+	var x112 uint64
+	x112, x111 = bits.Mul64(arg1[3], arg2[1])
+	var x113 uint64
+	var x114 uint64
+	x114, x113 = bits.Mul64(arg1[3], arg2[0])
+	var x115 uint64
+	var x116 uint64
+	x116, x115 = bits.Mul64(arg1[2], arg2[6])
+	var x117 uint64
+	var x118 uint64
+	x118, x117 = bits.Mul64(arg1[2], arg2[5])
+	var x119 uint64
+	var x120 uint64
+	x120, x119 = bits.Mul64(arg1[2], arg2[4])
+	var x121 uint64
+	var x122 uint64
+	x122, x121 = bits.Mul64(arg1[2], arg2[3])
+	var x123 uint64
+	var x124 uint64
+	x124, x123 = bits.Mul64(arg1[2], arg2[2])
+	var x125 uint64
+	var x126 uint64
+	x126, x125 = bits.Mul64(arg1[2], arg2[1])
+	var x127 uint64
+	var x128 uint64
+	x128, x127 = bits.Mul64(arg1[2], arg2[0])
+	var x129 uint64
+	var x130 uint64
+	x130, x129 = bits.Mul64(arg1[1], arg2[7])
+	var x131 uint64
+	var x132 uint64
+	x132, x131 = bits.Mul64(arg1[1], arg2[6])
+	var x133 uint64
+	var x134 uint64
+	x134, x133 = bits.Mul64(arg1[1], arg2[5])
+	var x135 uint64
+	var x136 uint64
+	x136, x135 = bits.Mul64(arg1[1], arg2[4])
+	var x137 uint64
+	var x138 uint64
+	x138, x137 = bits.Mul64(arg1[1], arg2[3])
+	var x139 uint64
+	var x140 uint64
+	x140, x139 = bits.Mul64(arg1[1], arg2[2])
+	var x141 uint64
+	var x142 uint64
+	x142, x141 = bits.Mul64(arg1[1], arg2[1])
+	var x143 uint64
+	var x144 uint64
+	x144, x143 = bits.Mul64(arg1[1], arg2[0])
+	var x145 uint64
+	var x146 uint64
+	x146, x145 = bits.Mul64(arg1[0], arg2[8])
+	var x147 uint64
+	var x148 uint64
+	x148, x147 = bits.Mul64(arg1[0], arg2[7])
+	var x149 uint64
+	var x150 uint64
+	x150, x149 = bits.Mul64(arg1[0], arg2[6])
+	var x151 uint64
+	var x152 uint64
+	x152, x151 = bits.Mul64(arg1[0], arg2[5])
+	var x153 uint64
+	var x154 uint64
+	x154, x153 = bits.Mul64(arg1[0], arg2[4])
+	var x155 uint64
+	var x156 uint64
+	x156, x155 = bits.Mul64(arg1[0], arg2[3])
+	var x157 uint64
+	var x158 uint64
+	x158, x157 = bits.Mul64(arg1[0], arg2[2])
+	var x159 uint64
+	var x160 uint64
+	x160, x159 = bits.Mul64(arg1[0], arg2[1])
+	var x161 uint64
+	var x162 uint64
+	x162, x161 = bits.Mul64(arg1[0], arg2[0])
+	var x163 uint64
+	var x164 p521Uint1
+	x163, x164 = p521AddcarryxU64(x29, x15, 0x0)
+	var x165 uint64
+	x165, _ = p521AddcarryxU64(x30, x16, x164)
+	var x167 uint64
+	var x168 p521Uint1
+	x167, x168 = p521AddcarryxU64(x41, x163, 0x0)
+	var x169 uint64
+	x169, _ = p521AddcarryxU64(x42, x165, x168)
+	var x171 uint64
+	var x172 p521Uint1
+	x171, x172 = p521AddcarryxU64(x51, x167, 0x0)
+	var x173 uint64
+	x173, _ = p521AddcarryxU64(x52, x169, x172)
+	var x175 uint64
+	var x176 p521Uint1
+	x175, x176 = p521AddcarryxU64(x59, x171, 0x0)
+	var x177 uint64
+	x177, _ = p521AddcarryxU64(x60, x173, x176)
+	var x179 uint64
+	var x180 p521Uint1
+	x179, x180 = p521AddcarryxU64(x65, x175, 0x0)
+	var x181 uint64
+	x181, _ = p521AddcarryxU64(x66, x177, x180)
+	var x183 uint64
+	var x184 p521Uint1
+	x183, x184 = p521AddcarryxU64(x69, x179, 0x0)
+	var x185 uint64
+	x185, _ = p521AddcarryxU64(x70, x181, x184)
+	var x187 uint64
+	var x188 p521Uint1
+	x187, x188 = p521AddcarryxU64(x71, x183, 0x0)
+	var x189 uint64
+	x189, _ = p521AddcarryxU64(x72, x185, x188)
+	var x191 uint64
+	var x192 p521Uint1
+	x191, x192 = p521AddcarryxU64(x161, x187, 0x0)
+	var x193 uint64
+	x193, _ = p521AddcarryxU64(x162, x189, x192)
+	x195 := ((x191 >> 58) | ((x193 << 6) & 0xffffffffffffffff))
+	x196 := (x193 >> 58)
+	x197 := (x191 & 0x3ffffffffffffff)
+	var x198 uint64
+	var x199 p521Uint1
+	x198, x199 = p521AddcarryxU64(x75, x73, 0x0)
+	var x200 uint64
+	x200, _ = p521AddcarryxU64(x76, x74, x199)
+	var x202 uint64
+	var x203 p521Uint1
+	x202, x203 = p521AddcarryxU64(x79, x198, 0x0)
+	var x204 uint64
+	x204, _ = p521AddcarryxU64(x80, x200, x203)
+	var x206 uint64
+	var x207 p521Uint1
+	x206, x207 = p521AddcarryxU64(x85, x202, 0x0)
+	var x208 uint64
+	x208, _ = p521AddcarryxU64(x86, x204, x207)
+	var x210 uint64
+	var x211 p521Uint1
+	x210, x211 = p521AddcarryxU64(x93, x206, 0x0)
+	var x212 uint64
+	x212, _ = p521AddcarryxU64(x94, x208, x211)
+	var x214 uint64
+	var x215 p521Uint1
+	x214, x215 = p521AddcarryxU64(x103, x210, 0x0)
+	var x216 uint64
+	x216, _ = p521AddcarryxU64(x104, x212, x215)
+	var x218 uint64
+	var x219 p521Uint1
+	x218, x219 = p521AddcarryxU64(x115, x214, 0x0)
+	var x220 uint64
+	x220, _ = p521AddcarryxU64(x116, x216, x219)
+	var x222 uint64
+	var x223 p521Uint1
+	x222, x223 = p521AddcarryxU64(x129, x218, 0x0)
+	var x224 uint64
+	x224, _ = p521AddcarryxU64(x130, x220, x223)
+	var x226 uint64
+	var x227 p521Uint1
+	x226, x227 = p521AddcarryxU64(x145, x222, 0x0)
+	var x228 uint64
+	x228, _ = p521AddcarryxU64(x146, x224, x227)
+	var x230 uint64
+	var x231 p521Uint1
+	x230, x231 = p521AddcarryxU64(x77, x1, 0x0)
+	var x232 uint64
+	x232, _ = p521AddcarryxU64(x78, x2, x231)
+	var x234 uint64
+	var x235 p521Uint1
+	x234, x235 = p521AddcarryxU64(x81, x230, 0x0)
+	var x236 uint64
+	x236, _ = p521AddcarryxU64(x82, x232, x235)
+	var x238 uint64
+	var x239 p521Uint1
+	x238, x239 = p521AddcarryxU64(x87, x234, 0x0)
+	var x240 uint64
+	x240, _ = p521AddcarryxU64(x88, x236, x239)
+	var x242 uint64
+	var x243 p521Uint1
+	x242, x243 = p521AddcarryxU64(x95, x238, 0x0)
+	var x244 uint64
+	x244, _ = p521AddcarryxU64(x96, x240, x243)
+	var x246 uint64
+	var x247 p521Uint1
+	x246, x247 = p521AddcarryxU64(x105, x242, 0x0)
+	var x248 uint64
+	x248, _ = p521AddcarryxU64(x106, x244, x247)
+	var x250 uint64
+	var x251 p521Uint1
+	x250, x251 = p521AddcarryxU64(x117, x246, 0x0)
+	var x252 uint64
+	x252, _ = p521AddcarryxU64(x118, x248, x251)
+	var x254 uint64
+	var x255 p521Uint1
+	x254, x255 = p521AddcarryxU64(x131, x250, 0x0)
+	var x256 uint64
+	x256, _ = p521AddcarryxU64(x132, x252, x255)
+	var x258 uint64
+	var x259 p521Uint1
+	x258, x259 = p521AddcarryxU64(x147, x254, 0x0)
+	var x260 uint64
+	x260, _ = p521AddcarryxU64(x148, x256, x259)
+	var x262 uint64
+	var x263 p521Uint1
+	x262, x263 = p521AddcarryxU64(x17, x3, 0x0)
+	var x264 uint64
+	x264, _ = p521AddcarryxU64(x18, x4, x263)
+	var x266 uint64
+	var x267 p521Uint1
+	x266, x267 = p521AddcarryxU64(x83, x262, 0x0)
+	var x268 uint64
+	x268, _ = p521AddcarryxU64(x84, x264, x267)
+	var x270 uint64
+	var x271 p521Uint1
+	x270, x271 = p521AddcarryxU64(x89, x266, 0x0)
+	var x272 uint64
+	x272, _ = p521AddcarryxU64(x90, x268, x271)
+	var x274 uint64
+	var x275 p521Uint1
+	x274, x275 = p521AddcarryxU64(x97, x270, 0x0)
+	var x276 uint64
+	x276, _ = p521AddcarryxU64(x98, x272, x275)
+	var x278 uint64
+	var x279 p521Uint1
+	x278, x279 = p521AddcarryxU64(x107, x274, 0x0)
+	var x280 uint64
+	x280, _ = p521AddcarryxU64(x108, x276, x279)
+	var x282 uint64
+	var x283 p521Uint1
+	x282, x283 = p521AddcarryxU64(x119, x278, 0x0)
+	var x284 uint64
+	x284, _ = p521AddcarryxU64(x120, x280, x283)
+	var x286 uint64
+	var x287 p521Uint1
+	x286, x287 = p521AddcarryxU64(x133, x282, 0x0)
+	var x288 uint64
+	x288, _ = p521AddcarryxU64(x134, x284, x287)
+	var x290 uint64
+	var x291 p521Uint1
+	x290, x291 = p521AddcarryxU64(x149, x286, 0x0)
+	var x292 uint64
+	x292, _ = p521AddcarryxU64(x150, x288, x291)
+	var x294 uint64
+	var x295 p521Uint1
+	x294, x295 = p521AddcarryxU64(x19, x5, 0x0)
+	var x296 uint64
+	x296, _ = p521AddcarryxU64(x20, x6, x295)
+	var x298 uint64
+	var x299 p521Uint1
+	x298, x299 = p521AddcarryxU64(x31, x294, 0x0)
+	var x300 uint64
+	x300, _ = p521AddcarryxU64(x32, x296, x299)
+	var x302 uint64
+	var x303 p521Uint1
+	x302, x303 = p521AddcarryxU64(x91, x298, 0x0)
+	var x304 uint64
+	x304, _ = p521AddcarryxU64(x92, x300, x303)
+	var x306 uint64
+	var x307 p521Uint1
+	x306, x307 = p521AddcarryxU64(x99, x302, 0x0)
+	var x308 uint64
+	x308, _ = p521AddcarryxU64(x100, x304, x307)
+	var x310 uint64
+	var x311 p521Uint1
+	x310, x311 = p521AddcarryxU64(x109, x306, 0x0)
+	var x312 uint64
+	x312, _ = p521AddcarryxU64(x110, x308, x311)
+	var x314 uint64
+	var x315 p521Uint1
+	x314, x315 = p521AddcarryxU64(x121, x310, 0x0)
+	var x316 uint64
+	x316, _ = p521AddcarryxU64(x122, x312, x315)
+	var x318 uint64
+	var x319 p521Uint1
+	x318, x319 = p521AddcarryxU64(x135, x314, 0x0)
+	var x320 uint64
+	x320, _ = p521AddcarryxU64(x136, x316, x319)
+	var x322 uint64
+	var x323 p521Uint1
+	x322, x323 = p521AddcarryxU64(x151, x318, 0x0)
+	var x324 uint64
+	x324, _ = p521AddcarryxU64(x152, x320, x323)
+	var x326 uint64
+	var x327 p521Uint1
+	x326, x327 = p521AddcarryxU64(x21, x7, 0x0)
+	var x328 uint64
+	x328, _ = p521AddcarryxU64(x22, x8, x327)
+	var x330 uint64
+	var x331 p521Uint1
+	x330, x331 = p521AddcarryxU64(x33, x326, 0x0)
+	var x332 uint64
+	x332, _ = p521AddcarryxU64(x34, x328, x331)
+	var x334 uint64
+	var x335 p521Uint1
+	x334, x335 = p521AddcarryxU64(x43, x330, 0x0)
+	var x336 uint64
+	x336, _ = p521AddcarryxU64(x44, x332, x335)
+	var x338 uint64
+	var x339 p521Uint1
+	x338, x339 = p521AddcarryxU64(x101, x334, 0x0)
+	var x340 uint64
+	x340, _ = p521AddcarryxU64(x102, x336, x339)
+	var x342 uint64
+	var x343 p521Uint1
+	x342, x343 = p521AddcarryxU64(x111, x338, 0x0)
+	var x344 uint64
+	x344, _ = p521AddcarryxU64(x112, x340, x343)
+	var x346 uint64
+	var x347 p521Uint1
+	x346, x347 = p521AddcarryxU64(x123, x342, 0x0)
+	var x348 uint64
+	x348, _ = p521AddcarryxU64(x124, x344, x347)
+	var x350 uint64
+	var x351 p521Uint1
+	x350, x351 = p521AddcarryxU64(x137, x346, 0x0)
+	var x352 uint64
+	x352, _ = p521AddcarryxU64(x138, x348, x351)
+	var x354 uint64
+	var x355 p521Uint1
+	x354, x355 = p521AddcarryxU64(x153, x350, 0x0)
+	var x356 uint64
+	x356, _ = p521AddcarryxU64(x154, x352, x355)
+	var x358 uint64
+	var x359 p521Uint1
+	x358, x359 = p521AddcarryxU64(x23, x9, 0x0)
+	var x360 uint64
+	x360, _ = p521AddcarryxU64(x24, x10, x359)
+	var x362 uint64
+	var x363 p521Uint1
+	x362, x363 = p521AddcarryxU64(x35, x358, 0x0)
+	var x364 uint64
+	x364, _ = p521AddcarryxU64(x36, x360, x363)
+	var x366 uint64
+	var x367 p521Uint1
+	x366, x367 = p521AddcarryxU64(x45, x362, 0x0)
+	var x368 uint64
+	x368, _ = p521AddcarryxU64(x46, x364, x367)
+	var x370 uint64
+	var x371 p521Uint1
+	x370, x371 = p521AddcarryxU64(x53, x366, 0x0)
+	var x372 uint64
+	x372, _ = p521AddcarryxU64(x54, x368, x371)
+	var x374 uint64
+	var x375 p521Uint1
+	x374, x375 = p521AddcarryxU64(x113, x370, 0x0)
+	var x376 uint64
+	x376, _ = p521AddcarryxU64(x114, x372, x375)
+	var x378 uint64
+	var x379 p521Uint1
+	x378, x379 = p521AddcarryxU64(x125, x374, 0x0)
+	var x380 uint64
+	x380, _ = p521AddcarryxU64(x126, x376, x379)
+	var x382 uint64
+	var x383 p521Uint1
+	x382, x383 = p521AddcarryxU64(x139, x378, 0x0)
+	var x384 uint64
+	x384, _ = p521AddcarryxU64(x140, x380, x383)
+	var x386 uint64
+	var x387 p521Uint1
+	x386, x387 = p521AddcarryxU64(x155, x382, 0x0)
+	var x388 uint64
+	x388, _ = p521AddcarryxU64(x156, x384, x387)
+	var x390 uint64
+	var x391 p521Uint1
+	x390, x391 = p521AddcarryxU64(x25, x11, 0x0)
+	var x392 uint64
+	x392, _ = p521AddcarryxU64(x26, x12, x391)
+	var x394 uint64
+	var x395 p521Uint1
+	x394, x395 = p521AddcarryxU64(x37, x390, 0x0)
+	var x396 uint64
+	x396, _ = p521AddcarryxU64(x38, x392, x395)
+	var x398 uint64
+	var x399 p521Uint1
+	x398, x399 = p521AddcarryxU64(x47, x394, 0x0)
+	var x400 uint64
+	x400, _ = p521AddcarryxU64(x48, x396, x399)
+	var x402 uint64
+	var x403 p521Uint1
+	x402, x403 = p521AddcarryxU64(x55, x398, 0x0)
+	var x404 uint64
+	x404, _ = p521AddcarryxU64(x56, x400, x403)
+	var x406 uint64
+	var x407 p521Uint1
+	x406, x407 = p521AddcarryxU64(x61, x402, 0x0)
+	var x408 uint64
+	x408, _ = p521AddcarryxU64(x62, x404, x407)
+	var x410 uint64
+	var x411 p521Uint1
+	x410, x411 = p521AddcarryxU64(x127, x406, 0x0)
+	var x412 uint64
+	x412, _ = p521AddcarryxU64(x128, x408, x411)
+	var x414 uint64
+	var x415 p521Uint1
+	x414, x415 = p521AddcarryxU64(x141, x410, 0x0)
+	var x416 uint64
+	x416, _ = p521AddcarryxU64(x142, x412, x415)
+	var x418 uint64
+	var x419 p521Uint1
+	x418, x419 = p521AddcarryxU64(x157, x414, 0x0)
+	var x420 uint64
+	x420, _ = p521AddcarryxU64(x158, x416, x419)
+	var x422 uint64
+	var x423 p521Uint1
+	x422, x423 = p521AddcarryxU64(x27, x13, 0x0)
+	var x424 uint64
+	x424, _ = p521AddcarryxU64(x28, x14, x423)
+	var x426 uint64
+	var x427 p521Uint1
+	x426, x427 = p521AddcarryxU64(x39, x422, 0x0)
+	var x428 uint64
+	x428, _ = p521AddcarryxU64(x40, x424, x427)
+	var x430 uint64
+	var x431 p521Uint1
+	x430, x431 = p521AddcarryxU64(x49, x426, 0x0)
+	var x432 uint64
+	x432, _ = p521AddcarryxU64(x50, x428, x431)
+	var x434 uint64
+	var x435 p521Uint1
+	x434, x435 = p521AddcarryxU64(x57, x430, 0x0)
+	var x436 uint64
+	x436, _ = p521AddcarryxU64(x58, x432, x435)
+	var x438 uint64
+	var x439 p521Uint1
+	x438, x439 = p521AddcarryxU64(x63, x434, 0x0)
+	var x440 uint64
+	x440, _ = p521AddcarryxU64(x64, x436, x439)
+	var x442 uint64
+	var x443 p521Uint1
+	x442, x443 = p521AddcarryxU64(x67, x438, 0x0)
+	var x444 uint64
+	x444, _ = p521AddcarryxU64(x68, x440, x443)
+	var x446 uint64
+	var x447 p521Uint1
+	x446, x447 = p521AddcarryxU64(x143, x442, 0x0)
+	var x448 uint64
+	x448, _ = p521AddcarryxU64(x144, x444, x447)
+	var x450 uint64
+	var x451 p521Uint1
+	x450, x451 = p521AddcarryxU64(x159, x446, 0x0)
+	var x452 uint64
+	x452, _ = p521AddcarryxU64(x160, x448, x451)
+	var x454 uint64
+	var x455 p521Uint1
+	x454, x455 = p521AddcarryxU64(x195, x450, 0x0)
+	var x456 uint64
+	x456, _ = p521AddcarryxU64(x196, x452, x455)
+	x458 := ((x454 >> 58) | ((x456 << 6) & 0xffffffffffffffff))
+	x459 := (x456 >> 58)
+	x460 := (x454 & 0x3ffffffffffffff)
+	var x461 uint64
+	var x462 p521Uint1
+	x461, x462 = p521AddcarryxU64(x458, x418, 0x0)
+	var x463 uint64
+	x463, _ = p521AddcarryxU64(x459, x420, x462)
+	x465 := ((x461 >> 58) | ((x463 << 6) & 0xffffffffffffffff))
+	x466 := (x463 >> 58)
+	x467 := (x461 & 0x3ffffffffffffff)
+	var x468 uint64
+	var x469 p521Uint1
+	x468, x469 = p521AddcarryxU64(x465, x386, 0x0)
+	var x470 uint64
+	x470, _ = p521AddcarryxU64(x466, x388, x469)
+	x472 := ((x468 >> 58) | ((x470 << 6) & 0xffffffffffffffff))
+	x473 := (x470 >> 58)
+	x474 := (x468 & 0x3ffffffffffffff)
+	var x475 uint64
+	var x476 p521Uint1
+	x475, x476 = p521AddcarryxU64(x472, x354, 0x0)
+	var x477 uint64
+	x477, _ = p521AddcarryxU64(x473, x356, x476)
+	x479 := ((x475 >> 58) | ((x477 << 6) & 0xffffffffffffffff))
+	x480 := (x477 >> 58)
+	x481 := (x475 & 0x3ffffffffffffff)
+	var x482 uint64
+	var x483 p521Uint1
+	x482, x483 = p521AddcarryxU64(x479, x322, 0x0)
+	var x484 uint64
+	x484, _ = p521AddcarryxU64(x480, x324, x483)
+	x486 := ((x482 >> 58) | ((x484 << 6) & 0xffffffffffffffff))
+	x487 := (x484 >> 58)
+	x488 := (x482 & 0x3ffffffffffffff)
+	var x489 uint64
+	var x490 p521Uint1
+	x489, x490 = p521AddcarryxU64(x486, x290, 0x0)
+	var x491 uint64
+	x491, _ = p521AddcarryxU64(x487, x292, x490)
+	x493 := ((x489 >> 58) | ((x491 << 6) & 0xffffffffffffffff))
+	x494 := (x491 >> 58)
+	x495 := (x489 & 0x3ffffffffffffff)
+	var x496 uint64
+	var x497 p521Uint1
+	x496, x497 = p521AddcarryxU64(x493, x258, 0x0)
+	var x498 uint64
+	x498, _ = p521AddcarryxU64(x494, x260, x497)
+	x500 := ((x496 >> 58) | ((x498 << 6) & 0xffffffffffffffff))
+	x501 := (x498 >> 58)
+	x502 := (x496 & 0x3ffffffffffffff)
+	var x503 uint64
+	var x504 p521Uint1
+	x503, x504 = p521AddcarryxU64(x500, x226, 0x0)
+	var x505 uint64
+	x505, _ = p521AddcarryxU64(x501, x228, x504)
+	x507 := ((x503 >> 57) | ((x505 << 7) & 0xffffffffffffffff))
+	x508 := (x505 >> 57)
+	x509 := (x503 & 0x1ffffffffffffff)
+	var x510 uint64
+	var x511 p521Uint1
+	x510, x511 = p521AddcarryxU64(x197, x507, 0x0)
+	x512 := (uint64(x511) + x508)
+	x513 := ((x510 >> 58) | ((x512 << 6) & 0xffffffffffffffff))
+	x514 := (x510 & 0x3ffffffffffffff)
+	x515 := (x513 + x460)
+	x516 := p521Uint1((x515 >> 58))
+	x517 := (x515 & 0x3ffffffffffffff)
+	x518 := (uint64(x516) + x467)
+	out1[0] = x514
+	out1[1] = x517
+	out1[2] = x518
+	out1[3] = x474
+	out1[4] = x481
+	out1[5] = x488
+	out1[6] = x495
+	out1[7] = x502
+	out1[8] = x509
+}
+
+// p521CarrySquare squares a field element and reduces the result.
+//
+// Postconditions:
+//   eval out1 mod m = (eval arg1 * eval arg1) mod m
+//
+// Input Bounds:
+//   arg1: [[0x0 ~> 0xc00000000000000], [0x0 ~> 0xc00000000000000], [0x0 ~> 0xc00000000000000], [0x0 ~> 0xc00000000000000], [0x0 ~> 0xc00000000000000], [0x0 ~> 0xc00000000000000], [0x0 ~> 0xc00000000000000], [0x0 ~> 0xc00000000000000], [0x0 ~> 0x600000000000000]]
+// Output Bounds:
+//   out1: [[0x0 ~> 0x400000000000000], [0x0 ~> 0x400000000000000], [0x0 ~> 0x400000000000000], [0x0 ~> 0x400000000000000], [0x0 ~> 0x400000000000000], [0x0 ~> 0x400000000000000], [0x0 ~> 0x400000000000000], [0x0 ~> 0x400000000000000], [0x0 ~> 0x200000000000000]]
+func p521CarrySquare(out1 *[9]uint64, arg1 *[9]uint64) {
+	x1 := arg1[8]
+	x2 := (x1 * 0x2)
+	x3 := (arg1[8] * 0x2)
+	x4 := arg1[7]
+	x5 := (x4 * 0x2)
+	x6 := (arg1[7] * 0x2)
+	x7 := arg1[6]
+	x8 := (x7 * 0x2)
+	x9 := (arg1[6] * 0x2)
+	x10 := arg1[5]
+	x11 := (x10 * 0x2)
+	x12 := (arg1[5] * 0x2)
+	x13 := (arg1[4] * 0x2)
+	x14 := (arg1[3] * 0x2)
+	x15 := (arg1[2] * 0x2)
+	x16 := (arg1[1] * 0x2)
+	var x17 uint64
+	var x18 uint64
+	x18, x17 = bits.Mul64(arg1[8], (x1 * 0x2))
+	var x19 uint64
+	var x20 uint64
+	x20, x19 = bits.Mul64(arg1[7], (x2 * 0x2))
+	var x21 uint64
+	var x22 uint64
+	x22, x21 = bits.Mul64(arg1[7], (x4 * 0x2))
+	var x23 uint64
+	var x24 uint64
+	x24, x23 = bits.Mul64(arg1[6], (x2 * 0x2))
+	var x25 uint64
+	var x26 uint64
+	x26, x25 = bits.Mul64(arg1[6], (x5 * 0x2))
+	var x27 uint64
+	var x28 uint64
+	x28, x27 = bits.Mul64(arg1[6], (x7 * 0x2))
+	var x29 uint64
+	var x30 uint64
+	x30, x29 = bits.Mul64(arg1[5], (x2 * 0x2))
+	var x31 uint64
+	var x32 uint64
+	x32, x31 = bits.Mul64(arg1[5], (x5 * 0x2))
+	var x33 uint64
+	var x34 uint64
+	x34, x33 = bits.Mul64(arg1[5], (x8 * 0x2))
+	var x35 uint64
+	var x36 uint64
+	x36, x35 = bits.Mul64(arg1[5], (x10 * 0x2))
+	var x37 uint64
+	var x38 uint64
+	x38, x37 = bits.Mul64(arg1[4], (x2 * 0x2))
+	var x39 uint64
+	var x40 uint64
+	x40, x39 = bits.Mul64(arg1[4], (x5 * 0x2))
+	var x41 uint64
+	var x42 uint64
+	x42, x41 = bits.Mul64(arg1[4], (x8 * 0x2))
+	var x43 uint64
+	var x44 uint64
+	x44, x43 = bits.Mul64(arg1[4], (x11 * 0x2))
+	var x45 uint64
+	var x46 uint64
+	x46, x45 = bits.Mul64(arg1[4], arg1[4])
+	var x47 uint64
+	var x48 uint64
+	x48, x47 = bits.Mul64(arg1[3], (x2 * 0x2))
+	var x49 uint64
+	var x50 uint64
+	x50, x49 = bits.Mul64(arg1[3], (x5 * 0x2))
+	var x51 uint64
+	var x52 uint64
+	x52, x51 = bits.Mul64(arg1[3], (x8 * 0x2))
+	var x53 uint64
+	var x54 uint64
+	x54, x53 = bits.Mul64(arg1[3], x12)
+	var x55 uint64
+	var x56 uint64
+	x56, x55 = bits.Mul64(arg1[3], x13)
+	var x57 uint64
+	var x58 uint64
+	x58, x57 = bits.Mul64(arg1[3], arg1[3])
+	var x59 uint64
+	var x60 uint64
+	x60, x59 = bits.Mul64(arg1[2], (x2 * 0x2))
+	var x61 uint64
+	var x62 uint64
+	x62, x61 = bits.Mul64(arg1[2], (x5 * 0x2))
+	var x63 uint64
+	var x64 uint64
+	x64, x63 = bits.Mul64(arg1[2], x9)
+	var x65 uint64
+	var x66 uint64
+	x66, x65 = bits.Mul64(arg1[2], x12)
+	var x67 uint64
+	var x68 uint64
+	x68, x67 = bits.Mul64(arg1[2], x13)
+	var x69 uint64
+	var x70 uint64
+	x70, x69 = bits.Mul64(arg1[2], x14)
+	var x71 uint64
+	var x72 uint64
+	x72, x71 = bits.Mul64(arg1[2], arg1[2])
+	var x73 uint64
+	var x74 uint64
+	x74, x73 = bits.Mul64(arg1[1], (x2 * 0x2))
+	var x75 uint64
+	var x76 uint64
+	x76, x75 = bits.Mul64(arg1[1], x6)
+	var x77 uint64
+	var x78 uint64
+	x78, x77 = bits.Mul64(arg1[1], x9)
+	var x79 uint64
+	var x80 uint64
+	x80, x79 = bits.Mul64(arg1[1], x12)
+	var x81 uint64
+	var x82 uint64
+	x82, x81 = bits.Mul64(arg1[1], x13)
+	var x83 uint64
+	var x84 uint64
+	x84, x83 = bits.Mul64(arg1[1], x14)
+	var x85 uint64
+	var x86 uint64
+	x86, x85 = bits.Mul64(arg1[1], x15)
+	var x87 uint64
+	var x88 uint64
+	x88, x87 = bits.Mul64(arg1[1], arg1[1])
+	var x89 uint64
+	var x90 uint64
+	x90, x89 = bits.Mul64(arg1[0], x3)
+	var x91 uint64
+	var x92 uint64
+	x92, x91 = bits.Mul64(arg1[0], x6)
+	var x93 uint64
+	var x94 uint64
+	x94, x93 = bits.Mul64(arg1[0], x9)
+	var x95 uint64
+	var x96 uint64
+	x96, x95 = bits.Mul64(arg1[0], x12)
+	var x97 uint64
+	var x98 uint64
+	x98, x97 = bits.Mul64(arg1[0], x13)
+	var x99 uint64
+	var x100 uint64
+	x100, x99 = bits.Mul64(arg1[0], x14)
+	var x101 uint64
+	var x102 uint64
+	x102, x101 = bits.Mul64(arg1[0], x15)
+	var x103 uint64
+	var x104 uint64
+	x104, x103 = bits.Mul64(arg1[0], x16)
+	var x105 uint64
+	var x106 uint64
+	x106, x105 = bits.Mul64(arg1[0], arg1[0])
+	var x107 uint64
+	var x108 p521Uint1
+	x107, x108 = p521AddcarryxU64(x51, x43, 0x0)
+	var x109 uint64
+	x109, _ = p521AddcarryxU64(x52, x44, x108)
+	var x111 uint64
+	var x112 p521Uint1
+	x111, x112 = p521AddcarryxU64(x61, x107, 0x0)
+	var x113 uint64
+	x113, _ = p521AddcarryxU64(x62, x109, x112)
+	var x115 uint64
+	var x116 p521Uint1
+	x115, x116 = p521AddcarryxU64(x73, x111, 0x0)
+	var x117 uint64
+	x117, _ = p521AddcarryxU64(x74, x113, x116)
+	var x119 uint64
+	var x120 p521Uint1
+	x119, x120 = p521AddcarryxU64(x105, x115, 0x0)
+	var x121 uint64
+	x121, _ = p521AddcarryxU64(x106, x117, x120)
+	x123 := ((x119 >> 58) | ((x121 << 6) & 0xffffffffffffffff))
+	x124 := (x121 >> 58)
+	x125 := (x119 & 0x3ffffffffffffff)
+	var x126 uint64
+	var x127 p521Uint1
+	x126, x127 = p521AddcarryxU64(x53, x45, 0x0)
+	var x128 uint64
+	x128, _ = p521AddcarryxU64(x54, x46, x127)
+	var x130 uint64
+	var x131 p521Uint1
+	x130, x131 = p521AddcarryxU64(x63, x126, 0x0)
+	var x132 uint64
+	x132, _ = p521AddcarryxU64(x64, x128, x131)
+	var x134 uint64
+	var x135 p521Uint1
+	x134, x135 = p521AddcarryxU64(x75, x130, 0x0)
+	var x136 uint64
+	x136, _ = p521AddcarryxU64(x76, x132, x135)
+	var x138 uint64
+	var x139 p521Uint1
+	x138, x139 = p521AddcarryxU64(x89, x134, 0x0)
+	var x140 uint64
+	x140, _ = p521AddcarryxU64(x90, x136, x139)
+	var x142 uint64
+	var x143 p521Uint1
+	x142, x143 = p521AddcarryxU64(x55, x17, 0x0)
+	var x144 uint64
+	x144, _ = p521AddcarryxU64(x56, x18, x143)
+	var x146 uint64
+	var x147 p521Uint1
+	x146, x147 = p521AddcarryxU64(x65, x142, 0x0)
+	var x148 uint64
+	x148, _ = p521AddcarryxU64(x66, x144, x147)
+	var x150 uint64
+	var x151 p521Uint1
+	x150, x151 = p521AddcarryxU64(x77, x146, 0x0)
+	var x152 uint64
+	x152, _ = p521AddcarryxU64(x78, x148, x151)
+	var x154 uint64
+	var x155 p521Uint1
+	x154, x155 = p521AddcarryxU64(x91, x150, 0x0)
+	var x156 uint64
+	x156, _ = p521AddcarryxU64(x92, x152, x155)
+	var x158 uint64
+	var x159 p521Uint1
+	x158, x159 = p521AddcarryxU64(x57, x19, 0x0)
+	var x160 uint64
+	x160, _ = p521AddcarryxU64(x58, x20, x159)
+	var x162 uint64
+	var x163 p521Uint1
+	x162, x163 = p521AddcarryxU64(x67, x158, 0x0)
+	var x164 uint64
+	x164, _ = p521AddcarryxU64(x68, x160, x163)
+	var x166 uint64
+	var x167 p521Uint1
+	x166, x167 = p521AddcarryxU64(x79, x162, 0x0)
+	var x168 uint64
+	x168, _ = p521AddcarryxU64(x80, x164, x167)
+	var x170 uint64
+	var x171 p521Uint1
+	x170, x171 = p521AddcarryxU64(x93, x166, 0x0)
+	var x172 uint64
+	x172, _ = p521AddcarryxU64(x94, x168, x171)
+	var x174 uint64
+	var x175 p521Uint1
+	x174, x175 = p521AddcarryxU64(x23, x21, 0x0)
+	var x176 uint64
+	x176, _ = p521AddcarryxU64(x24, x22, x175)
+	var x178 uint64
+	var x179 p521Uint1
+	x178, x179 = p521AddcarryxU64(x69, x174, 0x0)
+	var x180 uint64
+	x180, _ = p521AddcarryxU64(x70, x176, x179)
+	var x182 uint64
+	var x183 p521Uint1
+	x182, x183 = p521AddcarryxU64(x81, x178, 0x0)
+	var x184 uint64
+	x184, _ = p521AddcarryxU64(x82, x180, x183)
+	var x186 uint64
+	var x187 p521Uint1
+	x186, x187 = p521AddcarryxU64(x95, x182, 0x0)
+	var x188 uint64
+	x188, _ = p521AddcarryxU64(x96, x184, x187)
+	var x190 uint64
+	var x191 p521Uint1
+	x190, x191 = p521AddcarryxU64(x29, x25, 0x0)
+	var x192 uint64
+	x192, _ = p521AddcarryxU64(x30, x26, x191)
+	var x194 uint64
+	var x195 p521Uint1
+	x194, x195 = p521AddcarryxU64(x71, x190, 0x0)
+	var x196 uint64
+	x196, _ = p521AddcarryxU64(x72, x192, x195)
+	var x198 uint64
+	var x199 p521Uint1
+	x198, x199 = p521AddcarryxU64(x83, x194, 0x0)
+	var x200 uint64
+	x200, _ = p521AddcarryxU64(x84, x196, x199)
+	var x202 uint64
+	var x203 p521Uint1
+	x202, x203 = p521AddcarryxU64(x97, x198, 0x0)
+	var x204 uint64
+	x204, _ = p521AddcarryxU64(x98, x200, x203)
+	var x206 uint64
+	var x207 p521Uint1
+	x206, x207 = p521AddcarryxU64(x31, x27, 0x0)
+	var x208 uint64
+	x208, _ = p521AddcarryxU64(x32, x28, x207)
+	var x210 uint64
+	var x211 p521Uint1
+	x210, x211 = p521AddcarryxU64(x37, x206, 0x0)
+	var x212 uint64
+	x212, _ = p521AddcarryxU64(x38, x208, x211)
+	var x214 uint64
+	var x215 p521Uint1
+	x214, x215 = p521AddcarryxU64(x85, x210, 0x0)
+	var x216 uint64
+	x216, _ = p521AddcarryxU64(x86, x212, x215)
+	var x218 uint64
+	var x219 p521Uint1
+	x218, x219 = p521AddcarryxU64(x99, x214, 0x0)
+	var x220 uint64
+	x220, _ = p521AddcarryxU64(x100, x216, x219)
+	var x222 uint64
+	var x223 p521Uint1
+	x222, x223 = p521AddcarryxU64(x39, x33, 0x0)
+	var x224 uint64
+	x224, _ = p521AddcarryxU64(x40, x34, x223)
+	var x226 uint64
+	var x227 p521Uint1
+	x226, x227 = p521AddcarryxU64(x47, x222, 0x0)
+	var x228 uint64
+	x228, _ = p521AddcarryxU64(x48, x224, x227)
+	var x230 uint64
+	var x231 p521Uint1
+	x230, x231 = p521AddcarryxU64(x87, x226, 0x0)
+	var x232 uint64
+	x232, _ = p521AddcarryxU64(x88, x228, x231)
+	var x234 uint64
+	var x235 p521Uint1
+	x234, x235 = p521AddcarryxU64(x101, x230, 0x0)
+	var x236 uint64
+	x236, _ = p521AddcarryxU64(x102, x232, x235)
+	var x238 uint64
+	var x239 p521Uint1
+	x238, x239 = p521AddcarryxU64(x41, x35, 0x0)
+	var x240 uint64
+	x240, _ = p521AddcarryxU64(x42, x36, x239)
+	var x242 uint64
+	var x243 p521Uint1
+	x242, x243 = p521AddcarryxU64(x49, x238, 0x0)
+	var x244 uint64
+	x244, _ = p521AddcarryxU64(x50, x240, x243)
+	var x246 uint64
+	var x247 p521Uint1
+	x246, x247 = p521AddcarryxU64(x59, x242, 0x0)
+	var x248 uint64
+	x248, _ = p521AddcarryxU64(x60, x244, x247)
+	var x250 uint64
+	var x251 p521Uint1
+	x250, x251 = p521AddcarryxU64(x103, x246, 0x0)
+	var x252 uint64
+	x252, _ = p521AddcarryxU64(x104, x248, x251)
+	var x254 uint64
+	var x255 p521Uint1
+	x254, x255 = p521AddcarryxU64(x123, x250, 0x0)
+	var x256 uint64
+	x256, _ = p521AddcarryxU64(x124, x252, x255)
+	x258 := ((x254 >> 58) | ((x256 << 6) & 0xffffffffffffffff))
+	x259 := (x256 >> 58)
+	x260 := (x254 & 0x3ffffffffffffff)
+	var x261 uint64
+	var x262 p521Uint1
+	x261, x262 = p521AddcarryxU64(x258, x234, 0x0)
+	var x263 uint64
+	x263, _ = p521AddcarryxU64(x259, x236, x262)
+	x265 := ((x261 >> 58) | ((x263 << 6) & 0xffffffffffffffff))
+	x266 := (x263 >> 58)
+	x267 := (x261 & 0x3ffffffffffffff)
+	var x268 uint64
+	var x269 p521Uint1
+	x268, x269 = p521AddcarryxU64(x265, x218, 0x0)
+	var x270 uint64
+	x270, _ = p521AddcarryxU64(x266, x220, x269)
+	x272 := ((x268 >> 58) | ((x270 << 6) & 0xffffffffffffffff))
+	x273 := (x270 >> 58)
+	x274 := (x268 & 0x3ffffffffffffff)
+	var x275 uint64
+	var x276 p521Uint1
+	x275, x276 = p521AddcarryxU64(x272, x202, 0x0)
+	var x277 uint64
+	x277, _ = p521AddcarryxU64(x273, x204, x276)
+	x279 := ((x275 >> 58) | ((x277 << 6) & 0xffffffffffffffff))
+	x280 := (x277 >> 58)
+	x281 := (x275 & 0x3ffffffffffffff)
+	var x282 uint64
+	var x283 p521Uint1
+	x282, x283 = p521AddcarryxU64(x279, x186, 0x0)
+	var x284 uint64
+	x284, _ = p521AddcarryxU64(x280, x188, x283)
+	x286 := ((x282 >> 58) | ((x284 << 6) & 0xffffffffffffffff))
+	x287 := (x284 >> 58)
+	x288 := (x282 & 0x3ffffffffffffff)
+	var x289 uint64
+	var x290 p521Uint1
+	x289, x290 = p521AddcarryxU64(x286, x170, 0x0)
+	var x291 uint64
+	x291, _ = p521AddcarryxU64(x287, x172, x290)
+	x293 := ((x289 >> 58) | ((x291 << 6) & 0xffffffffffffffff))
+	x294 := (x291 >> 58)
+	x295 := (x289 & 0x3ffffffffffffff)
+	var x296 uint64
+	var x297 p521Uint1
+	x296, x297 = p521AddcarryxU64(x293, x154, 0x0)
+	var x298 uint64
+	x298, _ = p521AddcarryxU64(x294, x156, x297)
+	x300 := ((x296 >> 58) | ((x298 << 6) & 0xffffffffffffffff))
+	x301 := (x298 >> 58)
+	x302 := (x296 & 0x3ffffffffffffff)
+	var x303 uint64
+	var x304 p521Uint1
+	x303, x304 = p521AddcarryxU64(x300, x138, 0x0)
+	var x305 uint64
+	x305, _ = p521AddcarryxU64(x301, x140, x304)
+	x307 := ((x303 >> 57) | ((x305 << 7) & 0xffffffffffffffff))
+	x308 := (x305 >> 57)
+	x309 := (x303 & 0x1ffffffffffffff)
+	var x310 uint64
+	var x311 p521Uint1
+	x310, x311 = p521AddcarryxU64(x125, x307, 0x0)
+	x312 := (uint64(x311) + x308)
+	x313 := ((x310 >> 58) | ((x312 << 6) & 0xffffffffffffffff))
+	x314 := (x310 & 0x3ffffffffffffff)
+	x315 := (x313 + x260)
+	x316 := p521Uint1((x315 >> 58))
+	x317 := (x315 & 0x3ffffffffffffff)
+	x318 := (uint64(x316) + x267)
+	out1[0] = x314
+	out1[1] = x317
+	out1[2] = x318
+	out1[3] = x274
+	out1[4] = x281
+	out1[5] = x288
+	out1[6] = x295
+	out1[7] = x302
+	out1[8] = x309
+}
+
+// p521Carry reduces a field element.
+//
+// Postconditions:
+//   eval out1 mod m = eval arg1 mod m
+//
+// Input Bounds:
+//   arg1: [[0x0 ~> 0xc00000000000000], [0x0 ~> 0xc00000000000000], [0x0 ~> 0xc00000000000000], [0x0 ~> 0xc00000000000000], [0x0 ~> 0xc00000000000000], [0x0 ~> 0xc00000000000000], [0x0 ~> 0xc00000000000000], [0x0 ~> 0xc00000000000000], [0x0 ~> 0x600000000000000]]
+// Output Bounds:
+//   out1: [[0x0 ~> 0x400000000000000], [0x0 ~> 0x400000000000000], [0x0 ~> 0x400000000000000], [0x0 ~> 0x400000000000000], [0x0 ~> 0x400000000000000], [0x0 ~> 0x400000000000000], [0x0 ~> 0x400000000000000], [0x0 ~> 0x400000000000000], [0x0 ~> 0x200000000000000]]
+func p521Carry(out1 *[9]uint64, arg1 *[9]uint64) {
+	x1 := arg1[0]
+	x2 := ((x1 >> 58) + arg1[1])
+	x3 := ((x2 >> 58) + arg1[2])
+	x4 := ((x3 >> 58) + arg1[3])
+	x5 := ((x4 >> 58) + arg1[4])
+	x6 := ((x5 >> 58) + arg1[5])
+	x7 := ((x6 >> 58) + arg1[6])
+	x8 := ((x7 >> 58) + arg1[7])
+	x9 := ((x8 >> 58) + arg1[8])
+	x10 := ((x1 & 0x3ffffffffffffff) + (x9 >> 57))
+	x11 := (uint64(p521Uint1((x10 >> 58))) + (x2 & 0x3ffffffffffffff))
+	x12 := (x10 & 0x3ffffffffffffff)
+	x13 := (x11 & 0x3ffffffffffffff)
+	x14 := (uint64(p521Uint1((x11 >> 58))) + (x3 & 0x3ffffffffffffff))
+	x15 := (x4 & 0x3ffffffffffffff)
+	x16 := (x5 & 0x3ffffffffffffff)
+	x17 := (x6 & 0x3ffffffffffffff)
+	x18 := (x7 & 0x3ffffffffffffff)
+	x19 := (x8 & 0x3ffffffffffffff)
+	x20 := (x9 & 0x1ffffffffffffff)
+	out1[0] = x12
+	out1[1] = x13
+	out1[2] = x14
+	out1[3] = x15
+	out1[4] = x16
+	out1[5] = x17
+	out1[6] = x18
+	out1[7] = x19
+	out1[8] = x20
+}
+
+// p521Add adds two field elements.
+//
+// Postconditions:
+//   eval out1 mod m = (eval arg1 + eval arg2) mod m
+//
+// Input Bounds:
+//   arg1: [[0x0 ~> 0x400000000000000], [0x0 ~> 0x400000000000000], [0x0 ~> 0x400000000000000], [0x0 ~> 0x400000000000000], [0x0 ~> 0x400000000000000], [0x0 ~> 0x400000000000000], [0x0 ~> 0x400000000000000], [0x0 ~> 0x400000000000000], [0x0 ~> 0x200000000000000]]
+//   arg2: [[0x0 ~> 0x400000000000000], [0x0 ~> 0x400000000000000], [0x0 ~> 0x400000000000000], [0x0 ~> 0x400000000000000], [0x0 ~> 0x400000000000000], [0x0 ~> 0x400000000000000], [0x0 ~> 0x400000000000000], [0x0 ~> 0x400000000000000], [0x0 ~> 0x200000000000000]]
+// Output Bounds:
+//   out1: [[0x0 ~> 0xc00000000000000], [0x0 ~> 0xc00000000000000], [0x0 ~> 0xc00000000000000], [0x0 ~> 0xc00000000000000], [0x0 ~> 0xc00000000000000], [0x0 ~> 0xc00000000000000], [0x0 ~> 0xc00000000000000], [0x0 ~> 0xc00000000000000], [0x0 ~> 0x600000000000000]]
+func p521Add(out1 *[9]uint64, arg1 *[9]uint64, arg2 *[9]uint64) {
+	x1 := (arg1[0] + arg2[0])
+	x2 := (arg1[1] + arg2[1])
+	x3 := (arg1[2] + arg2[2])
+	x4 := (arg1[3] + arg2[3])
+	x5 := (arg1[4] + arg2[4])
+	x6 := (arg1[5] + arg2[5])
+	x7 := (arg1[6] + arg2[6])
+	x8 := (arg1[7] + arg2[7])
+	x9 := (arg1[8] + arg2[8])
+	out1[0] = x1
+	out1[1] = x2
+	out1[2] = x3
+	out1[3] = x4
+	out1[4] = x5
+	out1[5] = x6
+	out1[6] = x7
+	out1[7] = x8
+	out1[8] = x9
+}
+
+// p521Sub subtracts two field elements.
+//
+// Postconditions:
+//   eval out1 mod m = (eval arg1 - eval arg2) mod m
+//
+// Input Bounds:
+//   arg1: [[0x0 ~> 0x400000000000000], [0x0 ~> 0x400000000000000], [0x0 ~> 0x400000000000000], [0x0 ~> 0x400000000000000], [0x0 ~> 0x400000000000000], [0x0 ~> 0x400000000000000], [0x0 ~> 0x400000000000000], [0x0 ~> 0x400000000000000], [0x0 ~> 0x200000000000000]]
+//   arg2: [[0x0 ~> 0x400000000000000], [0x0 ~> 0x400000000000000], [0x0 ~> 0x400000000000000], [0x0 ~> 0x400000000000000], [0x0 ~> 0x400000000000000], [0x0 ~> 0x400000000000000], [0x0 ~> 0x400000000000000], [0x0 ~> 0x400000000000000], [0x0 ~> 0x200000000000000]]
+// Output Bounds:
+//   out1: [[0x0 ~> 0xc00000000000000], [0x0 ~> 0xc00000000000000], [0x0 ~> 0xc00000000000000], [0x0 ~> 0xc00000000000000], [0x0 ~> 0xc00000000000000], [0x0 ~> 0xc00000000000000], [0x0 ~> 0xc00000000000000], [0x0 ~> 0xc00000000000000], [0x0 ~> 0x600000000000000]]
+func p521Sub(out1 *[9]uint64, arg1 *[9]uint64, arg2 *[9]uint64) {
+	x1 := ((0x7fffffffffffffe + arg1[0]) - arg2[0])
+	x2 := ((0x7fffffffffffffe + arg1[1]) - arg2[1])
+	x3 := ((0x7fffffffffffffe + arg1[2]) - arg2[2])
+	x4 := ((0x7fffffffffffffe + arg1[3]) - arg2[3])
+	x5 := ((0x7fffffffffffffe + arg1[4]) - arg2[4])
+	x6 := ((0x7fffffffffffffe + arg1[5]) - arg2[5])
+	x7 := ((0x7fffffffffffffe + arg1[6]) - arg2[6])
+	x8 := ((0x7fffffffffffffe + arg1[7]) - arg2[7])
+	x9 := ((0x3fffffffffffffe + arg1[8]) - arg2[8])
+	out1[0] = x1
+	out1[1] = x2
+	out1[2] = x3
+	out1[3] = x4
+	out1[4] = x5
+	out1[5] = x6
+	out1[6] = x7
+	out1[7] = x8
+	out1[8] = x9
+}
+
+// p521ToBytes serializes a field element to bytes in little-endian order.
+//
+// Postconditions:
+//   out1 = map (λ x, ⌊((eval arg1 mod m) mod 2^(8 * (x + 1))) / 2^(8 * x)⌋) [0..65]
+//
+// Input Bounds:
+//   arg1: [[0x0 ~> 0x400000000000000], [0x0 ~> 0x400000000000000], [0x0 ~> 0x400000000000000], [0x0 ~> 0x400000000000000], [0x0 ~> 0x400000000000000], [0x0 ~> 0x400000000000000], [0x0 ~> 0x400000000000000], [0x0 ~> 0x400000000000000], [0x0 ~> 0x200000000000000]]
+// Output Bounds:
+//   out1: [[0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0x1]]
+func p521ToBytes(out1 *[66]uint8, arg1 *[9]uint64) {
+	var x1 uint64
+	var x2 p521Uint1
+	p521SubborrowxU58(&x1, &x2, 0x0, arg1[0], 0x3ffffffffffffff)
+	var x3 uint64
+	var x4 p521Uint1
+	p521SubborrowxU58(&x3, &x4, x2, arg1[1], 0x3ffffffffffffff)
+	var x5 uint64
+	var x6 p521Uint1
+	p521SubborrowxU58(&x5, &x6, x4, arg1[2], 0x3ffffffffffffff)
+	var x7 uint64
+	var x8 p521Uint1
+	p521SubborrowxU58(&x7, &x8, x6, arg1[3], 0x3ffffffffffffff)
+	var x9 uint64
+	var x10 p521Uint1
+	p521SubborrowxU58(&x9, &x10, x8, arg1[4], 0x3ffffffffffffff)
+	var x11 uint64
+	var x12 p521Uint1
+	p521SubborrowxU58(&x11, &x12, x10, arg1[5], 0x3ffffffffffffff)
+	var x13 uint64
+	var x14 p521Uint1
+	p521SubborrowxU58(&x13, &x14, x12, arg1[6], 0x3ffffffffffffff)
+	var x15 uint64
+	var x16 p521Uint1
+	p521SubborrowxU58(&x15, &x16, x14, arg1[7], 0x3ffffffffffffff)
+	var x17 uint64
+	var x18 p521Uint1
+	p521SubborrowxU57(&x17, &x18, x16, arg1[8], 0x1ffffffffffffff)
+	var x19 uint64
+	p521CmovznzU64(&x19, x18, uint64(0x0), 0xffffffffffffffff)
+	var x20 uint64
+	var x21 p521Uint1
+	p521AddcarryxU58(&x20, &x21, 0x0, x1, (x19 & 0x3ffffffffffffff))
+	var x22 uint64
+	var x23 p521Uint1
+	p521AddcarryxU58(&x22, &x23, x21, x3, (x19 & 0x3ffffffffffffff))
+	var x24 uint64
+	var x25 p521Uint1
+	p521AddcarryxU58(&x24, &x25, x23, x5, (x19 & 0x3ffffffffffffff))
+	var x26 uint64
+	var x27 p521Uint1
+	p521AddcarryxU58(&x26, &x27, x25, x7, (x19 & 0x3ffffffffffffff))
+	var x28 uint64
+	var x29 p521Uint1
+	p521AddcarryxU58(&x28, &x29, x27, x9, (x19 & 0x3ffffffffffffff))
+	var x30 uint64
+	var x31 p521Uint1
+	p521AddcarryxU58(&x30, &x31, x29, x11, (x19 & 0x3ffffffffffffff))
+	var x32 uint64
+	var x33 p521Uint1
+	p521AddcarryxU58(&x32, &x33, x31, x13, (x19 & 0x3ffffffffffffff))
+	var x34 uint64
+	var x35 p521Uint1
+	p521AddcarryxU58(&x34, &x35, x33, x15, (x19 & 0x3ffffffffffffff))
+	var x36 uint64
+	var x37 p521Uint1
+	p521AddcarryxU57(&x36, &x37, x35, x17, (x19 & 0x1ffffffffffffff))
+	x38 := (x34 << 6)
+	x39 := (x32 << 4)
+	x40 := (x30 << 2)
+	x41 := (x26 << 6)
+	x42 := (x24 << 4)
+	x43 := (x22 << 2)
+	x44 := (uint8(x20) & 0xff)
+	x45 := (x20 >> 8)
+	x46 := (uint8(x45) & 0xff)
+	x47 := (x45 >> 8)
+	x48 := (uint8(x47) & 0xff)
+	x49 := (x47 >> 8)
+	x50 := (uint8(x49) & 0xff)
+	x51 := (x49 >> 8)
+	x52 := (uint8(x51) & 0xff)
+	x53 := (x51 >> 8)
+	x54 := (uint8(x53) & 0xff)
+	x55 := (x53 >> 8)
+	x56 := (uint8(x55) & 0xff)
+	x57 := uint8((x55 >> 8))
+	x58 := (x43 + uint64(x57))
+	x59 := (uint8(x58) & 0xff)
+	x60 := (x58 >> 8)
+	x61 := (uint8(x60) & 0xff)
+	x62 := (x60 >> 8)
+	x63 := (uint8(x62) & 0xff)
+	x64 := (x62 >> 8)
+	x65 := (uint8(x64) & 0xff)
+	x66 := (x64 >> 8)
+	x67 := (uint8(x66) & 0xff)
+	x68 := (x66 >> 8)
+	x69 := (uint8(x68) & 0xff)
+	x70 := (x68 >> 8)
+	x71 := (uint8(x70) & 0xff)
+	x72 := uint8((x70 >> 8))
+	x73 := (x42 + uint64(x72))
+	x74 := (uint8(x73) & 0xff)
+	x75 := (x73 >> 8)
+	x76 := (uint8(x75) & 0xff)
+	x77 := (x75 >> 8)
+	x78 := (uint8(x77) & 0xff)
+	x79 := (x77 >> 8)
+	x80 := (uint8(x79) & 0xff)
+	x81 := (x79 >> 8)
+	x82 := (uint8(x81) & 0xff)
+	x83 := (x81 >> 8)
+	x84 := (uint8(x83) & 0xff)
+	x85 := (x83 >> 8)
+	x86 := (uint8(x85) & 0xff)
+	x87 := uint8((x85 >> 8))
+	x88 := (x41 + uint64(x87))
+	x89 := (uint8(x88) & 0xff)
+	x90 := (x88 >> 8)
+	x91 := (uint8(x90) & 0xff)
+	x92 := (x90 >> 8)
+	x93 := (uint8(x92) & 0xff)
+	x94 := (x92 >> 8)
+	x95 := (uint8(x94) & 0xff)
+	x96 := (x94 >> 8)
+	x97 := (uint8(x96) & 0xff)
+	x98 := (x96 >> 8)
+	x99 := (uint8(x98) & 0xff)
+	x100 := (x98 >> 8)
+	x101 := (uint8(x100) & 0xff)
+	x102 := uint8((x100 >> 8))
+	x103 := (uint8(x28) & 0xff)
+	x104 := (x28 >> 8)
+	x105 := (uint8(x104) & 0xff)
+	x106 := (x104 >> 8)
+	x107 := (uint8(x106) & 0xff)
+	x108 := (x106 >> 8)
+	x109 := (uint8(x108) & 0xff)
+	x110 := (x108 >> 8)
+	x111 := (uint8(x110) & 0xff)
+	x112 := (x110 >> 8)
+	x113 := (uint8(x112) & 0xff)
+	x114 := (x112 >> 8)
+	x115 := (uint8(x114) & 0xff)
+	x116 := uint8((x114 >> 8))
+	x117 := (x40 + uint64(x116))
+	x118 := (uint8(x117) & 0xff)
+	x119 := (x117 >> 8)
+	x120 := (uint8(x119) & 0xff)
+	x121 := (x119 >> 8)
+	x122 := (uint8(x121) & 0xff)
+	x123 := (x121 >> 8)
+	x124 := (uint8(x123) & 0xff)
+	x125 := (x123 >> 8)
+	x126 := (uint8(x125) & 0xff)
+	x127 := (x125 >> 8)
+	x128 := (uint8(x127) & 0xff)
+	x129 := (x127 >> 8)
+	x130 := (uint8(x129) & 0xff)
+	x131 := uint8((x129 >> 8))
+	x132 := (x39 + uint64(x131))
+	x133 := (uint8(x132) & 0xff)
+	x134 := (x132 >> 8)
+	x135 := (uint8(x134) & 0xff)
+	x136 := (x134 >> 8)
+	x137 := (uint8(x136) & 0xff)
+	x138 := (x136 >> 8)
+	x139 := (uint8(x138) & 0xff)
+	x140 := (x138 >> 8)
+	x141 := (uint8(x140) & 0xff)
+	x142 := (x140 >> 8)
+	x143 := (uint8(x142) & 0xff)
+	x144 := (x142 >> 8)
+	x145 := (uint8(x144) & 0xff)
+	x146 := uint8((x144 >> 8))
+	x147 := (x38 + uint64(x146))
+	x148 := (uint8(x147) & 0xff)
+	x149 := (x147 >> 8)
+	x150 := (uint8(x149) & 0xff)
+	x151 := (x149 >> 8)
+	x152 := (uint8(x151) & 0xff)
+	x153 := (x151 >> 8)
+	x154 := (uint8(x153) & 0xff)
+	x155 := (x153 >> 8)
+	x156 := (uint8(x155) & 0xff)
+	x157 := (x155 >> 8)
+	x158 := (uint8(x157) & 0xff)
+	x159 := (x157 >> 8)
+	x160 := (uint8(x159) & 0xff)
+	x161 := uint8((x159 >> 8))
+	x162 := (uint8(x36) & 0xff)
+	x163 := (x36 >> 8)
+	x164 := (uint8(x163) & 0xff)
+	x165 := (x163 >> 8)
+	x166 := (uint8(x165) & 0xff)
+	x167 := (x165 >> 8)
+	x168 := (uint8(x167) & 0xff)
+	x169 := (x167 >> 8)
+	x170 := (uint8(x169) & 0xff)
+	x171 := (x169 >> 8)
+	x172 := (uint8(x171) & 0xff)
+	x173 := (x171 >> 8)
+	x174 := (uint8(x173) & 0xff)
+	x175 := p521Uint1((x173 >> 8))
+	out1[0] = x44
+	out1[1] = x46
+	out1[2] = x48
+	out1[3] = x50
+	out1[4] = x52
+	out1[5] = x54
+	out1[6] = x56
+	out1[7] = x59
+	out1[8] = x61
+	out1[9] = x63
+	out1[10] = x65
+	out1[11] = x67
+	out1[12] = x69
+	out1[13] = x71
+	out1[14] = x74
+	out1[15] = x76
+	out1[16] = x78
+	out1[17] = x80
+	out1[18] = x82
+	out1[19] = x84
+	out1[20] = x86
+	out1[21] = x89
+	out1[22] = x91
+	out1[23] = x93
+	out1[24] = x95
+	out1[25] = x97
+	out1[26] = x99
+	out1[27] = x101
+	out1[28] = x102
+	out1[29] = x103
+	out1[30] = x105
+	out1[31] = x107
+	out1[32] = x109
+	out1[33] = x111
+	out1[34] = x113
+	out1[35] = x115
+	out1[36] = x118
+	out1[37] = x120
+	out1[38] = x122
+	out1[39] = x124
+	out1[40] = x126
+	out1[41] = x128
+	out1[42] = x130
+	out1[43] = x133
+	out1[44] = x135
+	out1[45] = x137
+	out1[46] = x139
+	out1[47] = x141
+	out1[48] = x143
+	out1[49] = x145
+	out1[50] = x148
+	out1[51] = x150
+	out1[52] = x152
+	out1[53] = x154
+	out1[54] = x156
+	out1[55] = x158
+	out1[56] = x160
+	out1[57] = x161
+	out1[58] = x162
+	out1[59] = x164
+	out1[60] = x166
+	out1[61] = x168
+	out1[62] = x170
+	out1[63] = x172
+	out1[64] = x174
+	out1[65] = uint8(x175)
+}
+
+// p521FromBytes deserializes a field element from bytes in little-endian order.
+//
+// Postconditions:
+//   eval out1 mod m = bytes_eval arg1 mod m
+//
+// Input Bounds:
+//   arg1: [[0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0xff], [0x0 ~> 0x1]]
+// Output Bounds:
+//   out1: [[0x0 ~> 0x400000000000000], [0x0 ~> 0x400000000000000], [0x0 ~> 0x400000000000000], [0x0 ~> 0x400000000000000], [0x0 ~> 0x400000000000000], [0x0 ~> 0x400000000000000], [0x0 ~> 0x400000000000000], [0x0 ~> 0x400000000000000], [0x0 ~> 0x200000000000000]]
+func p521FromBytes(out1 *[9]uint64, arg1 *[66]uint8) {
+	x1 := (uint64(p521Uint1(arg1[65])) << 56)
+	x2 := (uint64(arg1[64]) << 48)
+	x3 := (uint64(arg1[63]) << 40)
+	x4 := (uint64(arg1[62]) << 32)
+	x5 := (uint64(arg1[61]) << 24)
+	x6 := (uint64(arg1[60]) << 16)
+	x7 := (uint64(arg1[59]) << 8)
+	x8 := arg1[58]
+	x9 := (uint64(arg1[57]) << 50)
+	x10 := (uint64(arg1[56]) << 42)
+	x11 := (uint64(arg1[55]) << 34)
+	x12 := (uint64(arg1[54]) << 26)
+	x13 := (uint64(arg1[53]) << 18)
+	x14 := (uint64(arg1[52]) << 10)
+	x15 := (uint64(arg1[51]) << 2)
+	x16 := (uint64(arg1[50]) << 52)
+	x17 := (uint64(arg1[49]) << 44)
+	x18 := (uint64(arg1[48]) << 36)
+	x19 := (uint64(arg1[47]) << 28)
+	x20 := (uint64(arg1[46]) << 20)
+	x21 := (uint64(arg1[45]) << 12)
+	x22 := (uint64(arg1[44]) << 4)
+	x23 := (uint64(arg1[43]) << 54)
+	x24 := (uint64(arg1[42]) << 46)
+	x25 := (uint64(arg1[41]) << 38)
+	x26 := (uint64(arg1[40]) << 30)
+	x27 := (uint64(arg1[39]) << 22)
+	x28 := (uint64(arg1[38]) << 14)
+	x29 := (uint64(arg1[37]) << 6)
+	x30 := (uint64(arg1[36]) << 56)
+	x31 := (uint64(arg1[35]) << 48)
+	x32 := (uint64(arg1[34]) << 40)
+	x33 := (uint64(arg1[33]) << 32)
+	x34 := (uint64(arg1[32]) << 24)
+	x35 := (uint64(arg1[31]) << 16)
+	x36 := (uint64(arg1[30]) << 8)
+	x37 := arg1[29]
+	x38 := (uint64(arg1[28]) << 50)
+	x39 := (uint64(arg1[27]) << 42)
+	x40 := (uint64(arg1[26]) << 34)
+	x41 := (uint64(arg1[25]) << 26)
+	x42 := (uint64(arg1[24]) << 18)
+	x43 := (uint64(arg1[23]) << 10)
+	x44 := (uint64(arg1[22]) << 2)
+	x45 := (uint64(arg1[21]) << 52)
+	x46 := (uint64(arg1[20]) << 44)
+	x47 := (uint64(arg1[19]) << 36)
+	x48 := (uint64(arg1[18]) << 28)
+	x49 := (uint64(arg1[17]) << 20)
+	x50 := (uint64(arg1[16]) << 12)
+	x51 := (uint64(arg1[15]) << 4)
+	x52 := (uint64(arg1[14]) << 54)
+	x53 := (uint64(arg1[13]) << 46)
+	x54 := (uint64(arg1[12]) << 38)
+	x55 := (uint64(arg1[11]) << 30)
+	x56 := (uint64(arg1[10]) << 22)
+	x57 := (uint64(arg1[9]) << 14)
+	x58 := (uint64(arg1[8]) << 6)
+	x59 := (uint64(arg1[7]) << 56)
+	x60 := (uint64(arg1[6]) << 48)
+	x61 := (uint64(arg1[5]) << 40)
+	x62 := (uint64(arg1[4]) << 32)
+	x63 := (uint64(arg1[3]) << 24)
+	x64 := (uint64(arg1[2]) << 16)
+	x65 := (uint64(arg1[1]) << 8)
+	x66 := arg1[0]
+	x67 := (x65 + uint64(x66))
+	x68 := (x64 + x67)
+	x69 := (x63 + x68)
+	x70 := (x62 + x69)
+	x71 := (x61 + x70)
+	x72 := (x60 + x71)
+	x73 := (x59 + x72)
+	x74 := (x73 & 0x3ffffffffffffff)
+	x75 := uint8((x73 >> 58))
+	x76 := (x58 + uint64(x75))
+	x77 := (x57 + x76)
+	x78 := (x56 + x77)
+	x79 := (x55 + x78)
+	x80 := (x54 + x79)
+	x81 := (x53 + x80)
+	x82 := (x52 + x81)
+	x83 := (x82 & 0x3ffffffffffffff)
+	x84 := uint8((x82 >> 58))
+	x85 := (x51 + uint64(x84))
+	x86 := (x50 + x85)
+	x87 := (x49 + x86)
+	x88 := (x48 + x87)
+	x89 := (x47 + x88)
+	x90 := (x46 + x89)
+	x91 := (x45 + x90)
+	x92 := (x91 & 0x3ffffffffffffff)
+	x93 := uint8((x91 >> 58))
+	x94 := (x44 + uint64(x93))
+	x95 := (x43 + x94)
+	x96 := (x42 + x95)
+	x97 := (x41 + x96)
+	x98 := (x40 + x97)
+	x99 := (x39 + x98)
+	x100 := (x38 + x99)
+	x101 := (x36 + uint64(x37))
+	x102 := (x35 + x101)
+	x103 := (x34 + x102)
+	x104 := (x33 + x103)
+	x105 := (x32 + x104)
+	x106 := (x31 + x105)
+	x107 := (x30 + x106)
+	x108 := (x107 & 0x3ffffffffffffff)
+	x109 := uint8((x107 >> 58))
+	x110 := (x29 + uint64(x109))
+	x111 := (x28 + x110)
+	x112 := (x27 + x111)
+	x113 := (x26 + x112)
+	x114 := (x25 + x113)
+	x115 := (x24 + x114)
+	x116 := (x23 + x115)
+	x117 := (x116 & 0x3ffffffffffffff)
+	x118 := uint8((x116 >> 58))
+	x119 := (x22 + uint64(x118))
+	x120 := (x21 + x119)
+	x121 := (x20 + x120)
+	x122 := (x19 + x121)
+	x123 := (x18 + x122)
+	x124 := (x17 + x123)
+	x125 := (x16 + x124)
+	x126 := (x125 & 0x3ffffffffffffff)
+	x127 := uint8((x125 >> 58))
+	x128 := (x15 + uint64(x127))
+	x129 := (x14 + x128)
+	x130 := (x13 + x129)
+	x131 := (x12 + x130)
+	x132 := (x11 + x131)
+	x133 := (x10 + x132)
+	x134 := (x9 + x133)
+	x135 := (x7 + uint64(x8))
+	x136 := (x6 + x135)
+	x137 := (x5 + x136)
+	x138 := (x4 + x137)
+	x139 := (x3 + x138)
+	x140 := (x2 + x139)
+	x141 := (x1 + x140)
+	out1[0] = x74
+	out1[1] = x83
+	out1[2] = x92
+	out1[3] = x100
+	out1[4] = x108
+	out1[5] = x117
+	out1[6] = x126
+	out1[7] = x134
+	out1[8] = x141
+}
+
+// p521Selectznz is a multi-limb conditional select.
+//
+// Postconditions:
+//   eval out1 = (if arg1 = 0 then eval arg2 else eval arg3)
+//
+// Input Bounds:
+//   arg1: [0x0 ~> 0x1]
+//   arg2: [[0x0 ~> 0xffffffffffffffff], [0x0 ~> 0xffffffffffffffff], [0x0 ~> 0xffffffffffffffff], [0x0 ~> 0xffffffffffffffff], [0x0 ~> 0xffffffffffffffff], [0x0 ~> 0xffffffffffffffff], [0x0 ~> 0xffffffffffffffff], [0x0 ~> 0xffffffffffffffff], [0x0 ~> 0xffffffffffffffff]]
+//   arg3: [[0x0 ~> 0xffffffffffffffff], [0x0 ~> 0xffffffffffffffff], [0x0 ~> 0xffffffffffffffff], [0x0 ~> 0xffffffffffffffff], [0x0 ~> 0xffffffffffffffff], [0x0 ~> 0xffffffffffffffff], [0x0 ~> 0xffffffffffffffff], [0x0 ~> 0xffffffffffffffff], [0x0 ~> 0xffffffffffffffff]]
+// Output Bounds:
+//   out1: [[0x0 ~> 0xffffffffffffffff], [0x0 ~> 0xffffffffffffffff], [0x0 ~> 0xffffffffffffffff], [0x0 ~> 0xffffffffffffffff], [0x0 ~> 0xffffffffffffffff], [0x0 ~> 0xffffffffffffffff], [0x0 ~> 0xffffffffffffffff], [0x0 ~> 0xffffffffffffffff], [0x0 ~> 0xffffffffffffffff]]
+func p521Selectznz(out1 *[9]uint64, arg1 p521Uint1, arg2 *[9]uint64, arg3 *[9]uint64) {
+	var x1 uint64
+	p521CmovznzU64(&x1, arg1, arg2[0], arg3[0])
+	var x2 uint64
+	p521CmovznzU64(&x2, arg1, arg2[1], arg3[1])
+	var x3 uint64
+	p521CmovznzU64(&x3, arg1, arg2[2], arg3[2])
+	var x4 uint64
+	p521CmovznzU64(&x4, arg1, arg2[3], arg3[3])
+	var x5 uint64
+	p521CmovznzU64(&x5, arg1, arg2[4], arg3[4])
+	var x6 uint64
+	p521CmovznzU64(&x6, arg1, arg2[5], arg3[5])
+	var x7 uint64
+	p521CmovznzU64(&x7, arg1, arg2[6], arg3[6])
+	var x8 uint64
+	p521CmovznzU64(&x8, arg1, arg2[7], arg3[7])
+	var x9 uint64
+	p521CmovznzU64(&x9, arg1, arg2[8], arg3[8])
+	out1[0] = x1
+	out1[1] = x2
+	out1[2] = x3
+	out1[3] = x4
+	out1[4] = x5
+	out1[5] = x6
+	out1[6] = x7
+	out1[7] = x8
+	out1[8] = x9
+}
diff --git a/src/crypto/elliptic/internal/fiat/p521_test.go b/src/crypto/elliptic/internal/fiat/p521_test.go
new file mode 100644
index 0000000000..661bde397e
--- /dev/null
+++ b/src/crypto/elliptic/internal/fiat/p521_test.go
@@ -0,0 +1,37 @@
+// Copyright 2021 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package fiat_test
+
+import (
+	"crypto/elliptic/internal/fiat"
+	"crypto/rand"
+	"testing"
+)
+
+func p521Random(t *testing.T) *fiat.P521Element {
+	buf := make([]byte, 66)
+	if _, err := rand.Read(buf); err != nil {
+		t.Fatal(err)
+	}
+	buf[65] &= 1
+	e, err := new(fiat.P521Element).SetBytes(buf)
+	if err != nil {
+		t.Fatal(err)
+	}
+	return e
+}
+
+func TestP521Invert(t *testing.T) {
+	a := p521Random(t)
+	inv := new(fiat.P521Element).Invert(a)
+	one := new(fiat.P521Element).Mul(a, inv)
+	if new(fiat.P521Element).One().Equal(one) != 1 {
+		t.Errorf("a * 1/a != 1; got %x for %x", one.Bytes(), a.Bytes())
+	}
+	inv.Invert(new(fiat.P521Element))
+	if new(fiat.P521Element).Equal(inv) != 1 {
+		t.Errorf("1/0 != 0; got %x", inv.Bytes())
+	}
+}
diff --git a/src/crypto/elliptic/p256_asm.go b/src/crypto/elliptic/p256_asm.go
index 08dbd2ea54..9a808f260a 100644
--- a/src/crypto/elliptic/p256_asm.go
+++ b/src/crypto/elliptic/p256_asm.go
@@ -29,9 +29,7 @@ type (
 	}
 )
 
-var (
-	p256 p256Curve
-)
+var p256 p256Curve
 
 func initP256() {
 	// See FIPS 186-3, section D.2.3
diff --git a/src/crypto/elliptic/p256_generic.go b/src/crypto/elliptic/p256_generic.go
index 8ad56638e9..25762a8f76 100644
--- a/src/crypto/elliptic/p256_generic.go
+++ b/src/crypto/elliptic/p256_generic.go
@@ -7,9 +7,7 @@
 
 package elliptic
 
-var (
-	p256 p256Curve
-)
+var p256 p256Curve
 
 func initP256Arch() {
 	// Use pure Go implementation.
diff --git a/src/crypto/elliptic/p521.go b/src/crypto/elliptic/p521.go
new file mode 100644
index 0000000000..3d355943ec
--- /dev/null
+++ b/src/crypto/elliptic/p521.go
@@ -0,0 +1,259 @@
+// Copyright 2013 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package elliptic
+
+import (
+	"crypto/elliptic/internal/fiat"
+	"math/big"
+)
+
+type p521Curve struct {
+	*CurveParams
+}
+
+var p521 p521Curve
+var p521Params *CurveParams
+
+func initP521() {
+	// See FIPS 186-3, section D.2.5
+	p521.CurveParams = &CurveParams{Name: "P-521"}
+	p521.P, _ = new(big.Int).SetString("6864797660130609714981900799081393217269435300143305409394463459185543183397656052122559640661454554977296311391480858037121987999716643812574028291115057151", 10)
+	p521.N, _ = new(big.Int).SetString("6864797660130609714981900799081393217269435300143305409394463459185543183397655394245057746333217197532963996371363321113864768612440380340372808892707005449", 10)
+	p521.B, _ = new(big.Int).SetString("051953eb9618e1c9a1f929a21a0b68540eea2da725b99b315f3b8b489918ef109e156193951ec7e937b1652c0bd3bb1bf073573df883d2c34f1ef451fd46b503f00", 16)
+	p521.Gx, _ = new(big.Int).SetString("c6858e06b70404e9cd9e3ecb662395b4429c648139053fb521f828af606b4d3dbaa14b5e77efe75928fe1dc127a2ffa8de3348b3c1856a429bf97e7e31c2e5bd66", 16)
+	p521.Gy, _ = new(big.Int).SetString("11839296a789a3bc0045c8a5fb42c7d1bd998f54449579b446817afbd17273e662c97ee72995ef42640c550b9013fad0761353c7086a272c24088be94769fd16650", 16)
+	p521.BitSize = 521
+}
+
+func (curve p521Curve) Params() *CurveParams {
+	return curve.CurveParams
+}
+
+func (curve p521Curve) IsOnCurve(x, y *big.Int) bool {
+	x1 := bigIntToFiatP521(x)
+	y1 := bigIntToFiatP521(y)
+	b := bigIntToFiatP521(curve.B) // TODO: precompute this value.
+
+	// x³ - 3x + b.
+	x3 := new(fiat.P521Element).Square(x1)
+	x3.Mul(x3, x1)
+
+	threeX := new(fiat.P521Element).Add(x1, x1)
+	threeX.Add(threeX, x1)
+
+	x3.Sub(x3, threeX)
+	x3.Add(x3, b)
+
+	// y² = x³ - 3x + b
+	y2 := new(fiat.P521Element).Square(y1)
+
+	return x3.Equal(y2) == 1
+}
+
+type p521Point struct {
+	x, y, z *fiat.P521Element
+}
+
+func fiatP521ToBigInt(x *fiat.P521Element) *big.Int {
+	xBytes := x.Bytes()
+	for i := range xBytes[:len(xBytes)/2] {
+		xBytes[i], xBytes[len(xBytes)-i-1] = xBytes[len(xBytes)-i-1], xBytes[i]
+	}
+	return new(big.Int).SetBytes(xBytes)
+}
+
+// affineFromJacobian brings a point in Jacobian coordinates back to affine
+// coordinates, with (0, 0) representing infinity by convention. It also goes
+// back to big.Int values to match the exposed API.
+func (curve p521Curve) affineFromJacobian(p *p521Point) (x, y *big.Int) {
+	if p.z.IsZero() == 1 {
+		return new(big.Int), new(big.Int)
+	}
+
+	zinv := new(fiat.P521Element).Invert(p.z)
+	zinvsq := new(fiat.P521Element).Mul(zinv, zinv)
+
+	xx := new(fiat.P521Element).Mul(p.x, zinvsq)
+	zinvsq.Mul(zinvsq, zinv)
+	yy := new(fiat.P521Element).Mul(p.y, zinvsq)
+
+	return fiatP521ToBigInt(xx), fiatP521ToBigInt(yy)
+}
+
+func bigIntToFiatP521(x *big.Int) *fiat.P521Element {
+	xBytes := new(big.Int).Mod(x, p521.P).FillBytes(make([]byte, 66))
+	for i := range xBytes[:len(xBytes)/2] {
+		xBytes[i], xBytes[len(xBytes)-i-1] = xBytes[len(xBytes)-i-1], xBytes[i]
+	}
+	x1, err := new(fiat.P521Element).SetBytes(xBytes)
+	if err != nil {
+		// The input is reduced modulo P and encoded in a fixed size bytes
+		// slice, this should be impossible.
+		panic("internal error: bigIntToFiatP521")
+	}
+	return x1
+}
+
+// jacobianFromAffine converts (x, y) affine coordinates into (x, y, z) Jacobian
+// coordinates. It also converts from big.Int to fiat, which is necessarily a
+// messy and variable-time operation, which we can't avoid due to the exposed API.
+func (curve p521Curve) jacobianFromAffine(x, y *big.Int) *p521Point {
+	// (0, 0) is by convention the point at infinity, which can't be represented
+	// in affine coordinates, but is (0, 0, 0) in Jacobian.
+	if x.Sign() == 0 && y.Sign() == 0 {
+		return &p521Point{
+			x: new(fiat.P521Element),
+			y: new(fiat.P521Element),
+			z: new(fiat.P521Element),
+		}
+	}
+	return &p521Point{
+		x: bigIntToFiatP521(x),
+		y: bigIntToFiatP521(y),
+		z: new(fiat.P521Element).One(),
+	}
+}
+
+func (curve p521Curve) Add(x1, y1, x2, y2 *big.Int) (*big.Int, *big.Int) {
+	p1 := curve.jacobianFromAffine(x1, y1)
+	p2 := curve.jacobianFromAffine(x2, y2)
+	return curve.affineFromJacobian(p1.addJacobian(p1, p2))
+}
+
+// addJacobian sets q = p1 + p2, and returns q. The points may overlap.
+func (q *p521Point) addJacobian(p1, p2 *p521Point) *p521Point {
+	// https://hyperelliptic.org/EFD/g1p/auto-shortw-jacobian-3.html#addition-add-2007-bl
+	z1IsZero := p1.z.IsZero()
+	z2IsZero := p2.z.IsZero()
+
+	z1z1 := new(fiat.P521Element).Square(p1.z)
+	z2z2 := new(fiat.P521Element).Square(p2.z)
+
+	u1 := new(fiat.P521Element).Mul(p1.x, z2z2)
+	u2 := new(fiat.P521Element).Mul(p2.x, z1z1)
+	h := new(fiat.P521Element).Sub(u2, u1)
+	xEqual := h.IsZero() == 1
+	i := new(fiat.P521Element).Add(h, h)
+	i.Square(i)
+	j := new(fiat.P521Element).Mul(h, i)
+
+	s1 := new(fiat.P521Element).Mul(p1.y, p2.z)
+	s1.Mul(s1, z2z2)
+	s2 := new(fiat.P521Element).Mul(p2.y, p1.z)
+	s2.Mul(s2, z1z1)
+	r := new(fiat.P521Element).Sub(s2, s1)
+	yEqual := r.IsZero() == 1
+	if xEqual && yEqual && z1IsZero == 0 && z2IsZero == 0 {
+		return q.doubleJacobian(p1)
+	}
+	r.Add(r, r)
+	v := new(fiat.P521Element).Mul(u1, i)
+
+	x := new(fiat.P521Element).Set(r)
+	x.Square(x)
+	x.Sub(x, j)
+	x.Sub(x, v)
+	x.Sub(x, v)
+
+	y := new(fiat.P521Element).Set(r)
+	v.Sub(v, x)
+	y.Mul(y, v)
+	s1.Mul(s1, j)
+	s1.Add(s1, s1)
+	y.Sub(y, s1)
+
+	z := new(fiat.P521Element).Add(p1.z, p2.z)
+	z.Square(z)
+	z.Sub(z, z1z1)
+	z.Sub(z, z2z2)
+	z.Mul(z, h)
+
+	x.Select(p2.x, x, z1IsZero)
+	x.Select(p1.x, x, z2IsZero)
+	y.Select(p2.y, y, z1IsZero)
+	y.Select(p1.y, y, z2IsZero)
+	z.Select(p2.z, z, z1IsZero)
+	z.Select(p1.z, z, z2IsZero)
+
+	q.x.Set(x)
+	q.y.Set(y)
+	q.z.Set(z)
+	return q
+}
+
+func (curve p521Curve) Double(x1, y1 *big.Int) (*big.Int, *big.Int) {
+	p := curve.jacobianFromAffine(x1, y1)
+	return curve.affineFromJacobian(p.doubleJacobian(p))
+}
+
+// doubleJacobian sets q = p + p, and returns q. The points may overlap.
+func (q *p521Point) doubleJacobian(p *p521Point) *p521Point {
+	// https://hyperelliptic.org/EFD/g1p/auto-shortw-jacobian-3.html#doubling-dbl-2001-b
+	delta := new(fiat.P521Element).Square(p.z)
+	gamma := new(fiat.P521Element).Square(p.y)
+	alpha := new(fiat.P521Element).Sub(p.x, delta)
+	alpha2 := new(fiat.P521Element).Add(p.x, delta)
+	alpha.Mul(alpha, alpha2)
+	alpha2.Set(alpha)
+	alpha.Add(alpha, alpha)
+	alpha.Add(alpha, alpha2)
+
+	beta := alpha2.Mul(p.x, gamma)
+
+	q.x.Square(alpha)
+	beta8 := new(fiat.P521Element).Add(beta, beta)
+	beta8.Add(beta8, beta8)
+	beta8.Add(beta8, beta8)
+	q.x.Sub(q.x, beta8)
+
+	q.z.Add(p.y, p.z)
+	q.z.Square(q.z)
+	q.z.Sub(q.z, gamma)
+	q.z.Sub(q.z, delta)
+
+	beta.Add(beta, beta)
+	beta.Add(beta, beta)
+	beta.Sub(beta, q.x)
+	q.y.Mul(alpha, beta)
+
+	gamma.Square(gamma)
+	gamma.Add(gamma, gamma)
+	gamma.Add(gamma, gamma)
+	gamma.Add(gamma, gamma)
+
+	q.y.Sub(q.y, gamma)
+
+	return q
+}
+
+func (curve p521Curve) ScalarMult(Bx, By *big.Int, scalar []byte) (*big.Int, *big.Int) {
+	B := curve.jacobianFromAffine(Bx, By)
+	p, t := &p521Point{
+		x: new(fiat.P521Element),
+		y: new(fiat.P521Element),
+		z: new(fiat.P521Element),
+	}, &p521Point{
+		x: new(fiat.P521Element),
+		y: new(fiat.P521Element),
+		z: new(fiat.P521Element),
+	}
+
+	for _, byte := range scalar {
+		for bitNum := 0; bitNum < 8; bitNum++ {
+			p.doubleJacobian(p)
+			bit := (byte >> (7 - bitNum)) & 1
+			t.addJacobian(p, B)
+			p.x.Select(t.x, p.x, int(bit))
+			p.y.Select(t.y, p.y, int(bit))
+			p.z.Select(t.z, p.z, int(bit))
+		}
+	}
+
+	return curve.affineFromJacobian(p)
+}
+
+func (curve p521Curve) ScalarBaseMult(k []byte) (*big.Int, *big.Int) {
+	return curve.ScalarMult(curve.Gx, curve.Gy, k)
+}
diff --git a/src/crypto/md5/md5block_ppc64x.s b/src/crypto/md5/md5block_ppc64x.s
index e1f859e337..8c28ec2473 100644
--- a/src/crypto/md5/md5block_ppc64x.s
+++ b/src/crypto/md5/md5block_ppc64x.s
@@ -10,6 +10,7 @@
 // Licence: I hereby disclaim the copyright on this code and place it
 // in the public domain.
 
+//go:build ppc64 || ppc64le
 // +build ppc64 ppc64le
 
 #include "textflag.h"
diff --git a/src/crypto/tls/common.go b/src/crypto/tls/common.go
index ca93d4341d..3e24d746bc 100644
--- a/src/crypto/tls/common.go
+++ b/src/crypto/tls/common.go
@@ -619,7 +619,7 @@ type Config struct {
 	// protocol will be one from this list, and the connection will fail
 	// if there is no mutually supported protocol. If NextProtos is empty
 	// or the peer doesn't support ALPN, the connection will succeed and
-	// ConnectionState.NegotiatedProtocol will be empty."
+	// ConnectionState.NegotiatedProtocol will be empty.
 	NextProtos []string
 
 	// ServerName is used to verify the hostname on the returned
diff --git a/src/crypto/tls/handshake_client.go b/src/crypto/tls/handshake_client.go
index 9582a7f867..cd1b3b1d12 100644
--- a/src/crypto/tls/handshake_client.go
+++ b/src/crypto/tls/handshake_client.go
@@ -714,17 +714,11 @@ func (hs *clientHandshakeState) processServerHello() (bool, error) {
 		}
 	}
 
-	if hs.serverHello.alpnProtocol != "" {
-		if len(hs.hello.alpnProtocols) == 0 {
-			c.sendAlert(alertUnsupportedExtension)
-			return false, errors.New("tls: server advertised unrequested ALPN extension")
-		}
-		if mutualProtocol([]string{hs.serverHello.alpnProtocol}, hs.hello.alpnProtocols) == "" {
-			c.sendAlert(alertUnsupportedExtension)
-			return false, errors.New("tls: server selected unadvertised ALPN protocol")
-		}
-		c.clientProtocol = hs.serverHello.alpnProtocol
+	if err := checkALPN(hs.hello.alpnProtocols, hs.serverHello.alpnProtocol); err != nil {
+		c.sendAlert(alertUnsupportedExtension)
+		return false, err
 	}
+	c.clientProtocol = hs.serverHello.alpnProtocol
 
 	c.scts = hs.serverHello.scts
 
@@ -756,6 +750,23 @@ func (hs *clientHandshakeState) processServerHello() (bool, error) {
 	return true, nil
 }
 
+// checkALPN ensure that the server's choice of ALPN protocol is compatible with
+// the protocols that we advertised in the Client Hello.
+func checkALPN(clientProtos []string, serverProto string) error {
+	if serverProto == "" {
+		return nil
+	}
+	if len(clientProtos) == 0 {
+		return errors.New("tls: server advertised unrequested ALPN extension")
+	}
+	for _, proto := range clientProtos {
+		if proto == serverProto {
+			return nil
+		}
+	}
+	return errors.New("tls: server selected unadvertised ALPN protocol")
+}
+
 func (hs *clientHandshakeState) readFinished(out []byte) error {
 	c := hs.c
 
@@ -984,19 +995,6 @@ func clientSessionCacheKey(serverAddr net.Addr, config *Config) string {
 	return serverAddr.String()
 }
 
-// mutualProtocol finds the mutual ALPN protocol given list of possible
-// protocols and a list of the preference order.
-func mutualProtocol(protos, preferenceProtos []string) string {
-	for _, s := range preferenceProtos {
-		for _, c := range protos {
-			if s == c {
-				return s
-			}
-		}
-	}
-	return ""
-}
-
 // hostnameInSNI converts name into an appropriate hostname for SNI.
 // Literal IP addresses and absolute FQDNs are not permitted as SNI values.
 // See RFC 6066, Section 3.
diff --git a/src/crypto/tls/handshake_client_tls13.go b/src/crypto/tls/handshake_client_tls13.go
index 1405d6811f..c7989867f5 100644
--- a/src/crypto/tls/handshake_client_tls13.go
+++ b/src/crypto/tls/handshake_client_tls13.go
@@ -400,17 +400,11 @@ func (hs *clientHandshakeStateTLS13) readServerParameters() error {
 	}
 	hs.transcript.Write(encryptedExtensions.marshal())
 
-	if encryptedExtensions.alpnProtocol != "" {
-		if len(hs.hello.alpnProtocols) == 0 {
-			c.sendAlert(alertUnsupportedExtension)
-			return errors.New("tls: server advertised unrequested ALPN extension")
-		}
-		if mutualProtocol([]string{encryptedExtensions.alpnProtocol}, hs.hello.alpnProtocols) == "" {
-			c.sendAlert(alertUnsupportedExtension)
-			return errors.New("tls: server selected unadvertised ALPN protocol")
-		}
-		c.clientProtocol = encryptedExtensions.alpnProtocol
+	if err := checkALPN(hs.hello.alpnProtocols, encryptedExtensions.alpnProtocol); err != nil {
+		c.sendAlert(alertUnsupportedExtension)
+		return err
 	}
+	c.clientProtocol = encryptedExtensions.alpnProtocol
 
 	return nil
 }
diff --git a/src/crypto/tls/handshake_server.go b/src/crypto/tls/handshake_server.go
index 85afad0671..497e196a85 100644
--- a/src/crypto/tls/handshake_server.go
+++ b/src/crypto/tls/handshake_server.go
@@ -217,15 +217,13 @@ func (hs *serverHandshakeState) processClientHello() error {
 		c.serverName = hs.clientHello.serverName
 	}
 
-	if len(c.config.NextProtos) > 0 && len(hs.clientHello.alpnProtocols) > 0 {
-		selectedProto := mutualProtocol(hs.clientHello.alpnProtocols, c.config.NextProtos)
-		if selectedProto == "" {
-			c.sendAlert(alertNoApplicationProtocol)
-			return fmt.Errorf("tls: client requested unsupported application protocols (%s)", hs.clientHello.alpnProtocols)
-		}
-		hs.hello.alpnProtocol = selectedProto
-		c.clientProtocol = selectedProto
+	selectedProto, err := negotiateALPN(c.config.NextProtos, hs.clientHello.alpnProtocols)
+	if err != nil {
+		c.sendAlert(alertNoApplicationProtocol)
+		return err
 	}
+	hs.hello.alpnProtocol = selectedProto
+	c.clientProtocol = selectedProto
 
 	hs.cert, err = c.config.getCertificate(clientHelloInfo(hs.ctx, c, hs.clientHello))
 	if err != nil {
@@ -277,6 +275,34 @@ func (hs *serverHandshakeState) processClientHello() error {
 	return nil
 }
 
+// negotiateALPN picks a shared ALPN protocol that both sides support in server
+// preference order. If ALPN is not configured or the peer doesn't support it,
+// it returns "" and no error.
+func negotiateALPN(serverProtos, clientProtos []string) (string, error) {
+	if len(serverProtos) == 0 || len(clientProtos) == 0 {
+		return "", nil
+	}
+	var http11fallback bool
+	for _, s := range serverProtos {
+		for _, c := range clientProtos {
+			if s == c {
+				return s, nil
+			}
+			if s == "h2" && c == "http/1.1" {
+				http11fallback = true
+			}
+		}
+	}
+	// As a special case, let http/1.1 clients connect to h2 servers as if they
+	// didn't support ALPN. We used not to enforce protocol overlap, so over
+	// time a number of HTTP servers were configured with only "h2", but
+	// expected to accept connections from "http/1.1" clients. See Issue 46310.
+	if http11fallback {
+		return "", nil
+	}
+	return "", fmt.Errorf("tls: client requested unsupported application protocols (%s)", clientProtos)
+}
+
 // supportsECDHE returns whether ECDHE key exchanges can be used with this
 // pre-TLS 1.3 client.
 func supportsECDHE(c *Config, supportedCurves []CurveID, supportedPoints []uint8) bool {
diff --git a/src/crypto/tls/handshake_server_test.go b/src/crypto/tls/handshake_server_test.go
index 4483838045..f61b4c88ef 100644
--- a/src/crypto/tls/handshake_server_test.go
+++ b/src/crypto/tls/handshake_server_test.go
@@ -949,6 +949,27 @@ func TestHandshakeServerALPNNotConfigured(t *testing.T) {
 	runServerTestTLS13(t, test)
 }
 
+func TestHandshakeServerALPNFallback(t *testing.T) {
+	config := testConfig.Clone()
+	config.NextProtos = []string{"proto1", "h2", "proto2"}
+
+	test := &serverTest{
+		name: "ALPN-Fallback",
+		// Note that this needs OpenSSL 1.0.2 because that is the first
+		// version that supports the -alpn flag.
+		command: []string{"openssl", "s_client", "-alpn", "proto3,http/1.1,proto4", "-cipher", "ECDHE-RSA-CHACHA20-POLY1305", "-ciphersuites", "TLS_CHACHA20_POLY1305_SHA256"},
+		config:  config,
+		validate: func(state ConnectionState) error {
+			if state.NegotiatedProtocol != "" {
+				return fmt.Errorf("Got protocol %q, wanted nothing", state.NegotiatedProtocol)
+			}
+			return nil
+		},
+	}
+	runServerTestTLS12(t, test)
+	runServerTestTLS13(t, test)
+}
+
 // TestHandshakeServerSNI involves a client sending an SNI extension of
 // "snitest.com", which happens to match the CN of testSNICertificate. The test
 // verifies that the server correctly selects that certificate.
diff --git a/src/crypto/tls/handshake_server_tls13.go b/src/crypto/tls/handshake_server_tls13.go
index 742fdc3c05..109ff7a01d 100644
--- a/src/crypto/tls/handshake_server_tls13.go
+++ b/src/crypto/tls/handshake_server_tls13.go
@@ -11,7 +11,6 @@ import (
 	"crypto/hmac"
 	"crypto/rsa"
 	"errors"
-	"fmt"
 	"hash"
 	"io"
 	"sync/atomic"
@@ -555,15 +554,13 @@ func (hs *serverHandshakeStateTLS13) sendServerParameters() error {
 
 	encryptedExtensions := new(encryptedExtensionsMsg)
 
-	if len(c.config.NextProtos) > 0 && len(hs.clientHello.alpnProtocols) > 0 {
-		selectedProto := mutualProtocol(hs.clientHello.alpnProtocols, c.config.NextProtos)
-		if selectedProto == "" {
-			c.sendAlert(alertNoApplicationProtocol)
-			return fmt.Errorf("tls: client requested unsupported application protocols (%s)", hs.clientHello.alpnProtocols)
-		}
-		encryptedExtensions.alpnProtocol = selectedProto
-		c.clientProtocol = selectedProto
+	selectedProto, err := negotiateALPN(c.config.NextProtos, hs.clientHello.alpnProtocols)
+	if err != nil {
+		c.sendAlert(alertNoApplicationProtocol)
+		return err
 	}
+	encryptedExtensions.alpnProtocol = selectedProto
+	c.clientProtocol = selectedProto
 
 	hs.transcript.Write(encryptedExtensions.marshal())
 	if _, err := c.writeRecord(recordTypeHandshake, encryptedExtensions.marshal()); err != nil {
diff --git a/src/crypto/tls/key_agreement.go b/src/crypto/tls/key_agreement.go
index 8cfbd734f1..c28a64f3a8 100644
--- a/src/crypto/tls/key_agreement.go
+++ b/src/crypto/tls/key_agreement.go
@@ -86,7 +86,11 @@ func (ka rsaKeyAgreement) generateClientKeyExchange(config *Config, clientHello
 		return nil, nil, err
 	}
 
-	encrypted, err := rsa.EncryptPKCS1v15(config.rand(), cert.PublicKey.(*rsa.PublicKey), preMasterSecret)
+	rsaKey, ok := cert.PublicKey.(*rsa.PublicKey)
+	if !ok {
+		return nil, nil, errors.New("tls: server certificate contains incorrect key type for selected ciphersuite")
+	}
+	encrypted, err := rsa.EncryptPKCS1v15(config.rand(), rsaKey, preMasterSecret)
 	if err != nil {
 		return nil, nil, err
 	}
diff --git a/src/crypto/tls/testdata/Server-TLSv12-ALPN-Fallback b/src/crypto/tls/testdata/Server-TLSv12-ALPN-Fallback
new file mode 100644
index 0000000000..4fadf39062
--- /dev/null
+++ b/src/crypto/tls/testdata/Server-TLSv12-ALPN-Fallback
@@ -0,0 +1,91 @@
+>>> Flow 1 (client to server)
+00000000  16 03 01 00 a6 01 00 00  a2 03 03 b5 c9 ab 32 7f  |..............2.|
+00000010  e1 af 3f f2 ac 2a 11 dd  33 f9 b5 21 88 0d e4 29  |..?..*..3..!...)|
+00000020  e2 47 49 dc c7 31 a8 a5  25 81 0c 00 00 04 cc a8  |.GI..1..%.......|
+00000030  00 ff 01 00 00 75 00 0b  00 04 03 00 01 02 00 0a  |.....u..........|
+00000040  00 0c 00 0a 00 1d 00 17  00 1e 00 19 00 18 00 23  |...............#|
+00000050  00 00 00 10 00 19 00 17  06 70 72 6f 74 6f 33 08  |.........proto3.|
+00000060  68 74 74 70 2f 31 2e 31  06 70 72 6f 74 6f 34 00  |http/1.1.proto4.|
+00000070  16 00 00 00 17 00 00 00  0d 00 30 00 2e 04 03 05  |..........0.....|
+00000080  03 06 03 08 07 08 08 08  09 08 0a 08 0b 08 04 08  |................|
+00000090  05 08 06 04 01 05 01 06  01 03 03 02 03 03 01 02  |................|
+000000a0  01 03 02 02 02 04 02 05  02 06 02                 |...........|
+>>> Flow 2 (server to client)
+00000000  16 03 03 00 3b 02 00 00  37 03 03 00 00 00 00 00  |....;...7.......|
+00000010  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
+00000020  00 00 00 44 4f 57 4e 47  52 44 01 00 cc a8 00 00  |...DOWNGRD......|
+00000030  0f 00 23 00 00 ff 01 00  01 00 00 0b 00 02 01 00  |..#.............|
+00000040  16 03 03 02 59 0b 00 02  55 00 02 52 00 02 4f 30  |....Y...U..R..O0|
+00000050  82 02 4b 30 82 01 b4 a0  03 02 01 02 02 09 00 e8  |..K0............|
+00000060  f0 9d 3f e2 5b ea a6 30  0d 06 09 2a 86 48 86 f7  |..?.[..0...*.H..|
+00000070  0d 01 01 0b 05 00 30 1f  31 0b 30 09 06 03 55 04  |......0.1.0...U.|
+00000080  0a 13 02 47 6f 31 10 30  0e 06 03 55 04 03 13 07  |...Go1.0...U....|
+00000090  47 6f 20 52 6f 6f 74 30  1e 17 0d 31 36 30 31 30  |Go Root0...16010|
+000000a0  31 30 30 30 30 30 30 5a  17 0d 32 35 30 31 30 31  |1000000Z..250101|
+000000b0  30 30 30 30 30 30 5a 30  1a 31 0b 30 09 06 03 55  |000000Z0.1.0...U|
+000000c0  04 0a 13 02 47 6f 31 0b  30 09 06 03 55 04 03 13  |....Go1.0...U...|
+000000d0  02 47 6f 30 81 9f 30 0d  06 09 2a 86 48 86 f7 0d  |.Go0..0...*.H...|
+000000e0  01 01 01 05 00 03 81 8d  00 30 81 89 02 81 81 00  |.........0......|
+000000f0  db 46 7d 93 2e 12 27 06  48 bc 06 28 21 ab 7e c4  |.F}...'.H..(!.~.|
+00000100  b6 a2 5d fe 1e 52 45 88  7a 36 47 a5 08 0d 92 42  |..]..RE.z6G....B|
+00000110  5b c2 81 c0 be 97 79 98  40 fb 4f 6d 14 fd 2b 13  |[.....y.@.Om..+.|
+00000120  8b c2 a5 2e 67 d8 d4 09  9e d6 22 38 b7 4a 0b 74  |....g....."8.J.t|
+00000130  73 2b c2 34 f1 d1 93 e5  96 d9 74 7b f3 58 9f 6c  |s+.4......t{.X.l|
+00000140  61 3c c0 b0 41 d4 d9 2b  2b 24 23 77 5b 1c 3b bd  |a<..A..++$#w[.;.|
+00000150  75 5d ce 20 54 cf a1 63  87 1d 1e 24 c4 f3 1d 1a  |u]. T..c...$....|
+00000160  50 8b aa b6 14 43 ed 97  a7 75 62 f4 14 c8 52 d7  |P....C...ub...R.|
+00000170  02 03 01 00 01 a3 81 93  30 81 90 30 0e 06 03 55  |........0..0...U|
+00000180  1d 0f 01 01 ff 04 04 03  02 05 a0 30 1d 06 03 55  |...........0...U|
+00000190  1d 25 04 16 30 14 06 08  2b 06 01 05 05 07 03 01  |.%..0...+.......|
+000001a0  06 08 2b 06 01 05 05 07  03 02 30 0c 06 03 55 1d  |..+.......0...U.|
+000001b0  13 01 01 ff 04 02 30 00  30 19 06 03 55 1d 0e 04  |......0.0...U...|
+000001c0  12 04 10 9f 91 16 1f 43  43 3e 49 a6 de 6d b6 80  |.......CC>I..m..|
+000001d0  d7 9f 60 30 1b 06 03 55  1d 23 04 14 30 12 80 10  |..`0...U.#..0...|
+000001e0  48 13 49 4d 13 7e 16 31  bb a3 01 d5 ac ab 6e 7b  |H.IM.~.1......n{|
+000001f0  30 19 06 03 55 1d 11 04  12 30 10 82 0e 65 78 61  |0...U....0...exa|
+00000200  6d 70 6c 65 2e 67 6f 6c  61 6e 67 30 0d 06 09 2a  |mple.golang0...*|
+00000210  86 48 86 f7 0d 01 01 0b  05 00 03 81 81 00 9d 30  |.H.............0|
+00000220  cc 40 2b 5b 50 a0 61 cb  ba e5 53 58 e1 ed 83 28  |.@+[P.a...SX...(|
+00000230  a9 58 1a a9 38 a4 95 a1  ac 31 5a 1a 84 66 3d 43  |.X..8....1Z..f=C|
+00000240  d3 2d d9 0b f2 97 df d3  20 64 38 92 24 3a 00 bc  |.-...... d8.$:..|
+00000250  cf 9c 7d b7 40 20 01 5f  aa d3 16 61 09 a2 76 fd  |..}.@ ._...a..v.|
+00000260  13 c3 cc e1 0c 5c ee b1  87 82 f1 6c 04 ed 73 bb  |.....\.....l..s.|
+00000270  b3 43 77 8d 0c 1c f1 0f  a1 d8 40 83 61 c9 4c 72  |.Cw.......@.a.Lr|
+00000280  2b 9d ae db 46 06 06 4d  f4 c1 b3 3e c0 d1 bd 42  |+...F..M...>...B|
+00000290  d4 db fe 3d 13 60 84 5c  21 d3 3b e9 fa e7 16 03  |...=.`.\!.;.....|
+000002a0  03 00 ac 0c 00 00 a8 03  00 1d 20 2f e5 7d a3 47  |.......... /.}.G|
+000002b0  cd 62 43 15 28 da ac 5f  bb 29 07 30 ff f6 84 af  |.bC.(.._.).0....|
+000002c0  c4 cf c2 ed 90 99 5f 58  cb 3b 74 08 04 00 80 5f  |......_X.;t...._|
+000002d0  37 27 84 58 1e ea 1e 40  1b de a9 8f 04 d4 94 64  |7'.X...@.......d|
+000002e0  4e 27 c7 f1 b3 30 d0 53  f5 3d 57 50 d2 17 97 c8  |N'...0.S.=WP....|
+000002f0  3d 61 af a6 21 ab 1c 34  47 70 f8 b1 3b 9c 06 86  |=a..!..4Gp..;...|
+00000300  87 00 e2 13 50 83 91 ad  bc 84 bd b4 7b f3 4b ed  |....P.......{.K.|
+00000310  ca 81 0c 94 37 a8 ec 67  ca 9c f3 00 f6 af c2 92  |....7..g........|
+00000320  c4 8c 78 07 18 0e 43 24  1b 98 16 50 5c 2b 75 0e  |..x...C$...P\+u.|
+00000330  40 66 dc 40 cd 10 1a 51  25 f3 96 25 1a 3e 70 af  |@f.@...Q%..%.>p.|
+00000340  16 24 d0 1c 0e 33 f9 c1  74 cf b7 e2 28 ac 60 16  |.$...3..t...(.`.|
+00000350  03 03 00 04 0e 00 00 00                           |........|
+>>> Flow 3 (client to server)
+00000000  16 03 03 00 25 10 00 00  21 20 30 f2 bb f7 a7 ac  |....%...! 0.....|
+00000010  23 20 22 ee 73 0d 49 9c  b3 7b c1 9a db 2c 85 f3  |# ".s.I..{...,..|
+00000020  c0 82 31 60 bd 8b 14 4e  73 43 14 03 03 00 01 01  |..1`...NsC......|
+00000030  16 03 03 00 20 09 8d c7  86 ee cc f4 c7 36 a3 49  |.... ........6.I|
+00000040  d3 f7 a1 4a 68 a2 1e b4  fc cc a2 15 cb 01 92 d8  |...Jh...........|
+00000050  72 b0 d1 6f eb                                    |r..o.|
+>>> Flow 4 (server to client)
+00000000  16 03 03 00 8b 04 00 00  87 00 00 00 00 00 81 50  |...............P|
+00000010  46 ad c1 db a8 38 86 7b  2b bb fd d0 c3 42 3e 00  |F....8.{+....B>.|
+00000020  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 94  |................|
+00000030  6f e0 18 83 51 ed 14 ef  68 ca 42 c5 4c a2 ac 05  |o...Q...h.B.L...|
+00000040  9c 69 69 99 08 9f de a4  d4 e7 37 ab 14 38 4c 47  |.ii.......7..8LG|
+00000050  70 f0 97 1d db 2d 0a 14  c2 1e f0 16 9f 6d 37 02  |p....-.......m7.|
+00000060  4b f1 16 be 98 3f df 74  83 7c 19 85 61 49 38 16  |K....?.t.|..aI8.|
+00000070  ee 35 7a e2 3f 74 fe 8d  e3 07 93 a1 5e fa f2 02  |.5z.?t......^...|
+00000080  e5 c8 60 3f 11 83 8b 0e  32 52 f1 aa 52 b7 0a 89  |..`?....2R..R...|
+00000090  14 03 03 00 01 01 16 03  03 00 20 9e 65 15 cf 45  |.......... .e..E|
+000000a0  a5 03 69 c9 b1 d8 9e 92  a3 a2 b0 df 2e 62 b1 3a  |..i..........b.:|
+000000b0  17 78 cd e5 1d f3 51 42  7e 4e 25 17 03 03 00 1d  |.x....QB~N%.....|
+000000c0  d9 ae d0 fa b7 90 a9 2f  28 8d 1d 6f 54 1f c0 1e  |......./(..oT...|
+000000d0  4d ae b6 91 f0 e8 84 cf  86 11 22 25 ea 15 03 03  |M........."%....|
+000000e0  00 12 0e 71 f2 11 9e 9f  58 ad c0 d8 fc fa 34 bc  |...q....X.....4.|
+000000f0  02 5a 60 00                                       |.Z`.|
diff --git a/src/crypto/tls/testdata/Server-TLSv13-ALPN-Fallback b/src/crypto/tls/testdata/Server-TLSv13-ALPN-Fallback
new file mode 100644
index 0000000000..6203e6877c
--- /dev/null
+++ b/src/crypto/tls/testdata/Server-TLSv13-ALPN-Fallback
@@ -0,0 +1,100 @@
+>>> Flow 1 (client to server)
+00000000  16 03 01 00 eb 01 00 00  e7 03 03 1c d3 8e 3b d9  |..............;.|
+00000010  fe 7d e7 f9 9f fa c6 51  c3 8c 1b dd dc 87 95 f4  |.}.....Q........|
+00000020  39 23 67 e4 d6 bd 94 93  fc 88 4e 20 c3 c0 e2 c1  |9#g.......N ....|
+00000030  3d 12 ec 4c 0a 3f 40 51  13 24 61 11 c0 5d 09 f9  |=..L.?@Q.$a..]..|
+00000040  08 d6 3e cd e7 b3 51 c3  06 8f b4 42 00 04 13 03  |..>...Q....B....|
+00000050  00 ff 01 00 00 9a 00 0b  00 04 03 00 01 02 00 0a  |................|
+00000060  00 0c 00 0a 00 1d 00 17  00 1e 00 19 00 18 00 23  |...............#|
+00000070  00 00 00 10 00 19 00 17  06 70 72 6f 74 6f 33 08  |.........proto3.|
+00000080  68 74 74 70 2f 31 2e 31  06 70 72 6f 74 6f 34 00  |http/1.1.proto4.|
+00000090  16 00 00 00 17 00 00 00  0d 00 1e 00 1c 04 03 05  |................|
+000000a0  03 06 03 08 07 08 08 08  09 08 0a 08 0b 08 04 08  |................|
+000000b0  05 08 06 04 01 05 01 06  01 00 2b 00 03 02 03 04  |..........+.....|
+000000c0  00 2d 00 02 01 01 00 33  00 26 00 24 00 1d 00 20  |.-.....3.&.$... |
+000000d0  f4 05 eb 4a 7a 73 20 18  74 aa 14 2a 0c 35 63 29  |...Jzs .t..*.5c)|
+000000e0  cb f2 ad d1 a2 3d bd 9d  02 b4 62 00 bc eb 10 58  |.....=....b....X|
+>>> Flow 2 (server to client)
+00000000  16 03 03 00 7a 02 00 00  76 03 03 00 00 00 00 00  |....z...v.......|
+00000010  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
+00000020  00 00 00 00 00 00 00 00  00 00 00 20 c3 c0 e2 c1  |........... ....|
+00000030  3d 12 ec 4c 0a 3f 40 51  13 24 61 11 c0 5d 09 f9  |=..L.?@Q.$a..]..|
+00000040  08 d6 3e cd e7 b3 51 c3  06 8f b4 42 13 03 00 00  |..>...Q....B....|
+00000050  2e 00 2b 00 02 03 04 00  33 00 24 00 1d 00 20 2f  |..+.....3.$... /|
+00000060  e5 7d a3 47 cd 62 43 15  28 da ac 5f bb 29 07 30  |.}.G.bC.(.._.).0|
+00000070  ff f6 84 af c4 cf c2 ed  90 99 5f 58 cb 3b 74 14  |.........._X.;t.|
+00000080  03 03 00 01 01 17 03 03  00 17 fb 75 d8 5c 50 35  |...........u.\P5|
+00000090  55 82 ba 65 1e 63 73 b8  c1 e9 d7 f5 28 68 3c c1  |U..e.cs.....(h<.|
+000000a0  5d 17 03 03 02 6d 56 c9  a9 09 73 6a bc fd 1a 3c  |]....mV...sj...<|
+000000b0  6a f8 3e 32 99 83 e8 f6  01 9e 5e 30 e8 53 7f 72  |j.>2......^0.S.r|
+000000c0  fd 86 72 a8 9e 47 25 67  c1 f1 9a 03 c0 9d 6f 9d  |..r..G%g......o.|
+000000d0  bd ed 29 30 8f 3c 01 ce  49 bb 5f dd 58 9a ae 80  |..)0.<..I._.X...|
+000000e0  5c 2d 81 fc ea 7b 03 03  3d 5d bb 92 23 73 67 89  |\-...{..=]..#sg.|
+000000f0  2e f0 ec 08 20 8a 36 eb  43 a6 a1 68 d0 39 95 37  |.... .6.C..h.9.7|
+00000100  6b 15 a9 0e 46 20 92 51  9c 04 bf 3b 07 97 84 cb  |k...F .Q...;....|
+00000110  1f 30 38 37 2e ff e7 0f  f5 14 93 5a 84 f1 f7 10  |.087.......Z....|
+00000120  c2 a5 0d bb 97 96 ef 4a  e0 13 c0 63 72 2b 60 f3  |.......J...cr+`.|
+00000130  59 b5 57 aa 5f d1 da a9  0e dd 9c dd c2 cb 61 fe  |Y.W._.........a.|
+00000140  e2 69 8e db 5d 70 6c 3a  33 e0 9e db 9a 31 26 6a  |.i..]pl:3....1&j|
+00000150  2b 9e 19 8e bb 5d 06 48  ea c0 a1 c6 11 24 fb c4  |+....].H.....$..|
+00000160  ce ae 48 54 64 81 d1 84  38 a6 e0 7a 7b 74 2b bc  |..HTd...8..z{t+.|
+00000170  ce 07 8b b6 04 1f 5b 4c  36 29 68 0c 8c c7 32 15  |......[L6)h...2.|
+00000180  93 e0 10 52 c2 27 23 96  c5 0c 9c e9 e2 a9 08 7d  |...R.'#........}|
+00000190  25 68 65 f5 4e 44 eb a9  85 78 13 e1 0d 86 5e dc  |%he.ND...x....^.|
+000001a0  fd e5 c6 dd 65 46 8e 2f  32 82 83 0b dd 67 f8 42  |....eF./2....g.B|
+000001b0  65 87 3b 08 fe b1 f5 12  e9 74 21 04 12 6d 75 35  |e.;......t!..mu5|
+000001c0  b2 eb 93 95 72 10 fa 56  96 77 c3 0c 17 8c 9e f6  |....r..V.w......|
+000001d0  77 19 28 37 96 3e 73 98  f4 d2 91 4f 40 db 76 56  |w.(7.>s....O@.vV|
+000001e0  ce b5 a8 7a b8 86 d0 9a  ba b5 8b 40 c2 63 e1 cf  |...z.......@.c..|
+000001f0  49 29 2c 5d 1a 9b 8b 56  cb 93 ca 2c c0 d0 15 b7  |I),]...V...,....|
+00000200  8a f1 6a d5 0a a8 81 57  b1 6e 10 cd a5 ff b1 4d  |..j....W.n.....M|
+00000210  47 c6 9b 35 f1 5f 83 91  22 f6 88 68 65 b3 b9 c9  |G..5._.."..he...|
+00000220  02 dc 4b f7 13 39 06 e6  3a ec 94 ef 51 15 05 72  |..K..9..:...Q..r|
+00000230  1d f4 9d 3b da ca 8d 2c  64 be 9b 45 99 2c 63 cc  |...;...,d..E.,c.|
+00000240  22 b3 8b 93 ad f6 2c f0  d2 d9 11 3f 5b c0 40 fa  |".....,....?[.@.|
+00000250  90 6e a0 76 b2 43 b9 4c  72 c4 24 28 a2 bf 56 d6  |.n.v.C.Lr.$(..V.|
+00000260  d2 a7 2a d1 8c 5e 1d eb  f8 be d0 43 da 7a c7 88  |..*..^.....C.z..|
+00000270  61 67 a2 69 85 23 43 3e  d4 88 f2 33 c3 5b 38 0a  |ag.i.#C>...3.[8.|
+00000280  1e de 28 3b 3b 19 de 95  2f 84 c0 37 88 80 59 2f  |..(;;.../..7..Y/|
+00000290  a6 ee 93 1a 69 08 c3 df  7c cf da c3 9b 96 70 d9  |....i...|.....p.|
+000002a0  60 c5 e9 0f 42 f6 1a f2  58 5e f2 32 61 6a b2 a3  |`...B...X^.2aj..|
+000002b0  1f 97 fa 08 6c 3f 4b 83  1f 04 66 80 8a 26 3a 7f  |....l?K...f..&:.|
+000002c0  24 30 ec 10 ae 7d 19 ff  39 91 ca 97 4e ed 0a d7  |$0...}..9...N...|
+000002d0  64 3b 6b 50 29 33 0d b2  10 bc 83 63 3c fb 9a 82  |d;kP)3.....c<...|
+000002e0  3b 7f bc 04 40 f1 33 64  4a 80 cd 01 f9 f4 c6 89  |;...@.3dJ.......|
+000002f0  65 27 25 f9 cf 4f 7e c8  6e d9 0e ec 47 4a 51 29  |e'%..O~.n...GJQ)|
+00000300  2f be 34 50 bd 9b d2 d8  b7 ea bb 0b a1 e0 20 1b  |/.4P.......... .|
+00000310  02 9c f2 17 03 03 00 99  61 dc 0b 3a 30 de 39 f6  |........a..:0.9.|
+00000320  f3 db f8 6c 3b fa 4e 1e  7e 62 a5 ae 73 ba e1 41  |...l;.N.~b..s..A|
+00000330  58 77 2a c1 7a 0c 50 bb  0c 57 b4 c4 25 bf 2f 9f  |Xw*.z.P..W..%./.|
+00000340  38 91 e2 65 22 9d ca ac  18 58 7e 81 2d fd 74 24  |8..e"....X~.-.t$|
+00000350  28 69 76 11 df 9d 23 b8  be ae 8b e0 93 8e 5d df  |(iv...#.......].|
+00000360  0a 64 d0 b7 02 68 aa 86  01 0d 55 11 3b 76 70 c6  |.d...h....U.;vp.|
+00000370  83 0c 5e 0a e3 37 a5 8b  ad 25 50 b9 e8 5c 6b 04  |..^..7...%P..\k.|
+00000380  b4 51 ec 9c d3 fa c6 b7  9c f0 46 aa 73 da 3c 0d  |.Q........F.s.<.|
+00000390  d3 bd 32 81 d4 d2 f1 1a  b0 92 f3 73 3e 54 2b 05  |..2........s>T+.|
+000003a0  92 24 34 75 df d6 18 a0  6a 82 95 4c 9b fc 7e b6  |.$4u....j..L..~.|
+000003b0  8e 17 03 03 00 35 8f 34  0e 3b 91 d8 e7 74 24 71  |.....5.4.;...t$q|
+000003c0  0e 7b f3 12 bb 76 2f 31  12 17 b8 9e 24 ce f9 2f  |.{...v/1....$../|
+000003d0  3f 5d f2 13 4b 2e 9b 1e  c4 78 03 a6 c8 07 11 a3  |?]..K....x......|
+000003e0  98 79 61 6e 4f 44 6e 18  ee c4 9b 17 03 03 00 93  |.yanODn.........|
+000003f0  64 dd 52 a9 d9 51 63 6a  a0 a3 c2 75 6b 5d 1d 54  |d.R..Qcj...uk].T|
+00000400  ce d4 53 7e 14 8e d9 26  93 28 78 65 16 1b 95 77  |..S~...&.(xe...w|
+00000410  68 0a 46 f1 82 36 bb 8a  fa 0d df 54 8c 3d 83 e0  |h.F..6.....T.=..|
+00000420  d7 de 2d 96 e9 c4 d7 22  d3 97 8e ae 90 f8 fc e6  |..-...."........|
+00000430  a6 4b 78 98 4c c5 28 87  91 46 fa f4 1c 8d 0e ec  |.Kx.L.(..F......|
+00000440  0d 71 40 9a 04 49 b4 e8  5b 62 6f cd 16 c1 d5 fb  |.q@..I..[bo.....|
+00000450  73 2a 96 8f e5 a2 f4 11  1e df 2d 40 45 6b d5 a9  |s*........-@Ek..|
+00000460  e4 e3 f7 93 fc fa d7 20  af d5 f7 b4 0e 09 ad d5  |....... ........|
+00000470  26 87 b8 6c e2 20 95 fb  c0 70 3e 38 be b7 b1 9f  |&..l. ...p>8....|
+00000480  70 da c1                                          |p..|
+>>> Flow 3 (client to server)
+00000000  14 03 03 00 01 01 17 03  03 00 35 29 d2 b9 bb 9b  |..........5)....|
+00000010  de 6c 5d 22 23 c1 fe 99  4c c5 33 bf fd 70 36 6b  |.l]"#...L.3..p6k|
+00000020  f1 a5 92 e8 bf 7c 3d 6e  ef 6a 44 73 bc cb 27 1c  |.....|=n.jDs..'.|
+00000030  09 5d bf 99 4c 19 24 c3  3b 30 91 b5 e3 b6 63 45  |.]..L.$.;0....cE|
+>>> Flow 4 (server to client)
+00000000  17 03 03 00 1e 52 55 85  7c b8 87 dd c7 b2 d9 5b  |.....RU.|......[|
+00000010  18 1d bb ac bf b6 ab 76  82 be 64 0e b2 7b 2c 0f  |.......v..d..{,.|
+00000020  aa 17 92 17 03 03 00 13  79 0a 60 b1 46 20 33 74  |........y.`.F 3t|
+00000030  ed 12 a0 23 de 68 88 fc  6f dd 8e                 |...#.h..o..|
diff --git a/src/crypto/x509/internal/macos/corefoundation.s b/src/crypto/x509/internal/macos/corefoundation.s
index a9efaa299d..cda2336c9d 100644
--- a/src/crypto/x509/internal/macos/corefoundation.s
+++ b/src/crypto/x509/internal/macos/corefoundation.s
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build darwin && !ios
 // +build darwin,!ios
 
 #include "textflag.h"
diff --git a/src/crypto/x509/internal/macos/security.s b/src/crypto/x509/internal/macos/security.s
index 09ce5c6c76..0038f25b27 100644
--- a/src/crypto/x509/internal/macos/security.s
+++ b/src/crypto/x509/internal/macos/security.s
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build darwin && !ios
 // +build darwin,!ios
 
 #include "textflag.h"
diff --git a/src/crypto/x509/parser.go b/src/crypto/x509/parser.go
index 578227ab8e..f085162a4e 100644
--- a/src/crypto/x509/parser.go
+++ b/src/crypto/x509/parser.go
@@ -24,7 +24,6 @@ import (
 	"unicode/utf8"
 
 	"golang.org/x/crypto/cryptobyte"
-	cbasn1 "golang.org/x/crypto/cryptobyte/asn1"
 	cryptobyte_asn1 "golang.org/x/crypto/cryptobyte/asn1"
 )
 
@@ -55,23 +54,23 @@ func isPrintable(b byte) bool {
 // UTF8String, BMPString, and IA5String. This is mostly copied from the
 // respective encoding/asn1.parse... methods, rather than just increasing
 // the API surface of that package.
-func parseASN1String(tag cbasn1.Tag, value []byte) (string, error) {
+func parseASN1String(tag cryptobyte_asn1.Tag, value []byte) (string, error) {
 	switch tag {
-	case cbasn1.T61String:
+	case cryptobyte_asn1.T61String:
 		return string(value), nil
-	case cbasn1.PrintableString:
+	case cryptobyte_asn1.PrintableString:
 		for _, b := range value {
 			if !isPrintable(b) {
 				return "", errors.New("invalid PrintableString")
 			}
 		}
 		return string(value), nil
-	case cbasn1.UTF8String:
+	case cryptobyte_asn1.UTF8String:
 		if !utf8.Valid(value) {
 			return "", errors.New("invalid UTF-8 string")
 		}
 		return string(value), nil
-	case cbasn1.Tag(asn1.TagBMPString):
+	case cryptobyte_asn1.Tag(asn1.TagBMPString):
 		if len(value)%2 != 0 {
 			return "", errors.New("invalid BMPString")
 		}
@@ -88,7 +87,7 @@ func parseASN1String(tag cbasn1.Tag, value []byte) (string, error) {
 		}
 
 		return string(utf16.Decode(s)), nil
-	case cbasn1.IA5String:
+	case cryptobyte_asn1.IA5String:
 		s := string(value)
 		if isIA5String(s) != nil {
 			return "", errors.New("invalid IA5String")
@@ -101,7 +100,7 @@ func parseASN1String(tag cbasn1.Tag, value []byte) (string, error) {
 // parseName parses a DER encoded Name as defined in RFC 5280. We may
 // want to export this function in the future for use in crypto/tls.
 func parseName(raw cryptobyte.String) (*pkix.RDNSequence, error) {
-	if !raw.ReadASN1(&raw, cbasn1.SEQUENCE) {
+	if !raw.ReadASN1(&raw, cryptobyte_asn1.SEQUENCE) {
 		return nil, errors.New("x509: invalid RDNSequence")
 	}
 
@@ -109,12 +108,12 @@ func parseName(raw cryptobyte.String) (*pkix.RDNSequence, error) {
 	for !raw.Empty() {
 		var rdnSet pkix.RelativeDistinguishedNameSET
 		var set cryptobyte.String
-		if !raw.ReadASN1(&set, cbasn1.SET) {
+		if !raw.ReadASN1(&set, cryptobyte_asn1.SET) {
 			return nil, errors.New("x509: invalid RDNSequence")
 		}
 		for !set.Empty() {
 			var atav cryptobyte.String
-			if !set.ReadASN1(&atav, cbasn1.SEQUENCE) {
+			if !set.ReadASN1(&atav, cryptobyte_asn1.SEQUENCE) {
 				return nil, errors.New("x509: invalid RDNSequence: invalid attribute")
 			}
 			var attr pkix.AttributeTypeAndValue
@@ -122,7 +121,7 @@ func parseName(raw cryptobyte.String) (*pkix.RDNSequence, error) {
 				return nil, errors.New("x509: invalid RDNSequence: invalid attribute type")
 			}
 			var rawValue cryptobyte.String
-			var valueTag cbasn1.Tag
+			var valueTag cryptobyte_asn1.Tag
 			if !atav.ReadAnyASN1(&rawValue, &valueTag) {
 				return nil, errors.New("x509: invalid RDNSequence: invalid attribute value")
 			}
@@ -149,7 +148,7 @@ func parseAI(der cryptobyte.String) (pkix.AlgorithmIdentifier, error) {
 		return ai, nil
 	}
 	var params cryptobyte.String
-	var tag cbasn1.Tag
+	var tag cryptobyte_asn1.Tag
 	if !der.ReadAnyASN1Element(¶ms, &tag) {
 		return ai, errors.New("x509: malformed parameters")
 	}
@@ -162,11 +161,11 @@ func parseValidity(der cryptobyte.String) (time.Time, time.Time, error) {
 	extract := func() (time.Time, error) {
 		var t time.Time
 		switch {
-		case der.PeekASN1Tag(cbasn1.UTCTime):
+		case der.PeekASN1Tag(cryptobyte_asn1.UTCTime):
 			// TODO(rolandshoemaker): once #45411 is fixed, the following code
 			// should be replaced with a call to der.ReadASN1UTCTime.
 			var utc cryptobyte.String
-			if !der.ReadASN1(&utc, cbasn1.UTCTime) {
+			if !der.ReadASN1(&utc, cryptobyte_asn1.UTCTime) {
 				return t, errors.New("x509: malformed UTCTime")
 			}
 			s := string(utc)
@@ -190,7 +189,7 @@ func parseValidity(der cryptobyte.String) (time.Time, time.Time, error) {
 				// UTCTime only encodes times prior to 2050. See https://tools.ietf.org/html/rfc5280#section-4.1.2.5.1
 				t = t.AddDate(-100, 0, 0)
 			}
-		case der.PeekASN1Tag(cbasn1.GeneralizedTime):
+		case der.PeekASN1Tag(cryptobyte_asn1.GeneralizedTime):
 			if !der.ReadASN1GeneralizedTime(&t) {
 				return t, errors.New("x509: malformed GeneralizedTime")
 			}
@@ -217,13 +216,13 @@ func parseExtension(der cryptobyte.String) (pkix.Extension, error) {
 	if !der.ReadASN1ObjectIdentifier(&ext.Id) {
 		return ext, errors.New("x509: malformed extention OID field")
 	}
-	if der.PeekASN1Tag(cbasn1.BOOLEAN) {
+	if der.PeekASN1Tag(cryptobyte_asn1.BOOLEAN) {
 		if !der.ReadASN1Boolean(&ext.Critical) {
 			return ext, errors.New("x509: malformed extention critical field")
 		}
 	}
 	var val cryptobyte.String
-	if !der.ReadASN1(&val, cbasn1.OCTET_STRING) {
+	if !der.ReadASN1(&val, cryptobyte_asn1.OCTET_STRING) {
 		return ext, errors.New("x509: malformed extention value field")
 	}
 	ext.Value = val
@@ -241,7 +240,7 @@ func parsePublicKey(algo PublicKeyAlgorithm, keyData *publicKeyInfo) (interface{
 		}
 
 		p := &pkcs1PublicKey{N: new(big.Int)}
-		if !der.ReadASN1(&der, cbasn1.SEQUENCE) {
+		if !der.ReadASN1(&der, cryptobyte_asn1.SEQUENCE) {
 			return nil, errors.New("x509: invalid RSA public key")
 		}
 		if !der.ReadASN1Integer(p.N) {
@@ -307,7 +306,7 @@ func parsePublicKey(algo PublicKeyAlgorithm, keyData *publicKeyInfo) (interface{
 			},
 		}
 		paramsDer := cryptobyte.String(keyData.Algorithm.Parameters.FullBytes)
-		if !paramsDer.ReadASN1(¶msDer, cbasn1.SEQUENCE) ||
+		if !paramsDer.ReadASN1(¶msDer, cryptobyte_asn1.SEQUENCE) ||
 			!paramsDer.ReadASN1Integer(pub.Parameters.P) ||
 			!paramsDer.ReadASN1Integer(pub.Parameters.Q) ||
 			!paramsDer.ReadASN1Integer(pub.Parameters.G) {
@@ -340,16 +339,16 @@ func parseKeyUsageExtension(der cryptobyte.String) (KeyUsage, error) {
 
 func parseBasicConstraintsExtension(der cryptobyte.String) (bool, int, error) {
 	var isCA bool
-	if !der.ReadASN1(&der, cbasn1.SEQUENCE) {
+	if !der.ReadASN1(&der, cryptobyte_asn1.SEQUENCE) {
 		return false, 0, errors.New("x509: invalid basic constraints a")
 	}
-	if der.PeekASN1Tag(cbasn1.BOOLEAN) {
+	if der.PeekASN1Tag(cryptobyte_asn1.BOOLEAN) {
 		if !der.ReadASN1Boolean(&isCA) {
 			return false, 0, errors.New("x509: invalid basic constraints b")
 		}
 	}
 	maxPathLen := -1
-	if !der.Empty() && der.PeekASN1Tag(cbasn1.INTEGER) {
+	if !der.Empty() && der.PeekASN1Tag(cryptobyte_asn1.INTEGER) {
 		if !der.ReadASN1Integer(&maxPathLen) {
 			return false, 0, errors.New("x509: invalid basic constraints c")
 		}
@@ -360,12 +359,12 @@ func parseBasicConstraintsExtension(der cryptobyte.String) (bool, int, error) {
 }
 
 func forEachSAN(der cryptobyte.String, callback func(tag int, data []byte) error) error {
-	if !der.ReadASN1(&der, cbasn1.SEQUENCE) {
+	if !der.ReadASN1(&der, cryptobyte_asn1.SEQUENCE) {
 		return errors.New("x509: invalid subject alternative names")
 	}
 	for !der.Empty() {
 		var san cryptobyte.String
-		var tag cbasn1.Tag
+		var tag cryptobyte_asn1.Tag
 		if !der.ReadAnyASN1(&san, &tag) {
 			return errors.New("x509: invalid subject alternative name")
 		}
@@ -425,7 +424,7 @@ func parseSANExtension(der cryptobyte.String) (dnsNames, emailAddresses []string
 func parseExtKeyUsageExtension(der cryptobyte.String) ([]ExtKeyUsage, []asn1.ObjectIdentifier, error) {
 	var extKeyUsages []ExtKeyUsage
 	var unknownUsages []asn1.ObjectIdentifier
-	if !der.ReadASN1(&der, cbasn1.SEQUENCE) {
+	if !der.ReadASN1(&der, cryptobyte_asn1.SEQUENCE) {
 		return nil, nil, errors.New("x509: invalid extended key usages")
 	}
 	for !der.Empty() {
@@ -444,12 +443,12 @@ func parseExtKeyUsageExtension(der cryptobyte.String) ([]ExtKeyUsage, []asn1.Obj
 
 func parseCertificatePoliciesExtension(der cryptobyte.String) ([]asn1.ObjectIdentifier, error) {
 	var oids []asn1.ObjectIdentifier
-	if !der.ReadASN1(&der, cbasn1.SEQUENCE) {
+	if !der.ReadASN1(&der, cryptobyte_asn1.SEQUENCE) {
 		return nil, errors.New("x509: invalid certificate policies")
 	}
 	for !der.Empty() {
 		var cp cryptobyte.String
-		if !der.ReadASN1(&cp, cbasn1.SEQUENCE) {
+		if !der.ReadASN1(&cp, cryptobyte_asn1.SEQUENCE) {
 			return nil, errors.New("x509: invalid certificate policies")
 		}
 		var oid asn1.ObjectIdentifier
@@ -697,31 +696,31 @@ func processExtensions(out *Certificate) error {
 				//     fullName                [0]     GeneralNames,
 				//     nameRelativeToCRLIssuer [1]     RelativeDistinguishedName }
 				val := cryptobyte.String(e.Value)
-				if !val.ReadASN1(&val, cbasn1.SEQUENCE) {
+				if !val.ReadASN1(&val, cryptobyte_asn1.SEQUENCE) {
 					return errors.New("x509: invalid CRL distribution points")
 				}
 				for !val.Empty() {
 					var dpDER cryptobyte.String
-					if !val.ReadASN1(&dpDER, cbasn1.SEQUENCE) {
+					if !val.ReadASN1(&dpDER, cryptobyte_asn1.SEQUENCE) {
 						return errors.New("x509: invalid CRL distribution point")
 					}
 					var dpNameDER cryptobyte.String
 					var dpNamePresent bool
-					if !dpDER.ReadOptionalASN1(&dpNameDER, &dpNamePresent, cbasn1.Tag(0).Constructed().ContextSpecific()) {
+					if !dpDER.ReadOptionalASN1(&dpNameDER, &dpNamePresent, cryptobyte_asn1.Tag(0).Constructed().ContextSpecific()) {
 						return errors.New("x509: invalid CRL distribution point")
 					}
 					if !dpNamePresent {
 						continue
 					}
-					if !dpNameDER.ReadASN1(&dpNameDER, cbasn1.Tag(0).Constructed().ContextSpecific()) {
+					if !dpNameDER.ReadASN1(&dpNameDER, cryptobyte_asn1.Tag(0).Constructed().ContextSpecific()) {
 						return errors.New("x509: invalid CRL distribution point")
 					}
 					for !dpNameDER.Empty() {
-						if !dpNameDER.PeekASN1Tag(cbasn1.Tag(6).ContextSpecific()) {
+						if !dpNameDER.PeekASN1Tag(cryptobyte_asn1.Tag(6).ContextSpecific()) {
 							break
 						}
 						var uri cryptobyte.String
-						if !dpNameDER.ReadASN1(&uri, cbasn1.Tag(6).ContextSpecific()) {
+						if !dpNameDER.ReadASN1(&uri, cryptobyte_asn1.Tag(6).ContextSpecific()) {
 							return errors.New("x509: invalid CRL distribution point")
 						}
 						out.CRLDistributionPoints = append(out.CRLDistributionPoints, string(uri))
@@ -732,13 +731,15 @@ func processExtensions(out *Certificate) error {
 				// RFC 5280, 4.2.1.1
 				val := cryptobyte.String(e.Value)
 				var akid cryptobyte.String
-				if !val.ReadASN1(&akid, cbasn1.SEQUENCE) {
+				if !val.ReadASN1(&akid, cryptobyte_asn1.SEQUENCE) {
 					return errors.New("x509: invalid authority key identifier")
 				}
-				if !akid.ReadASN1(&akid, cbasn1.Tag(0).ContextSpecific()) {
-					return errors.New("x509: invalid authority key identifier")
+				if akid.PeekASN1Tag(cryptobyte_asn1.Tag(0).ContextSpecific()) {
+					if !akid.ReadASN1(&akid, cryptobyte_asn1.Tag(0).ContextSpecific()) {
+						return errors.New("x509: invalid authority key identifier")
+					}
+					out.AuthorityKeyId = akid
 				}
-				out.AuthorityKeyId = akid
 			case 37:
 				out.ExtKeyUsage, out.UnknownExtKeyUsage, err = parseExtKeyUsageExtension(e.Value)
 				if err != nil {
@@ -748,7 +749,7 @@ func processExtensions(out *Certificate) error {
 				// RFC 5280, 4.2.1.2
 				val := cryptobyte.String(e.Value)
 				var skid cryptobyte.String
-				if !val.ReadASN1(&skid, cbasn1.OCTET_STRING) {
+				if !val.ReadASN1(&skid, cryptobyte_asn1.OCTET_STRING) {
 					return errors.New("x509: invalid subject key identifier")
 				}
 				out.SubjectKeyId = skid
@@ -764,22 +765,22 @@ func processExtensions(out *Certificate) error {
 		} else if e.Id.Equal(oidExtensionAuthorityInfoAccess) {
 			// RFC 5280 4.2.2.1: Authority Information Access
 			val := cryptobyte.String(e.Value)
-			if !val.ReadASN1(&val, cbasn1.SEQUENCE) {
+			if !val.ReadASN1(&val, cryptobyte_asn1.SEQUENCE) {
 				return errors.New("x509: invalid authority info access")
 			}
 			for !val.Empty() {
 				var aiaDER cryptobyte.String
-				if !val.ReadASN1(&aiaDER, cbasn1.SEQUENCE) {
+				if !val.ReadASN1(&aiaDER, cryptobyte_asn1.SEQUENCE) {
 					return errors.New("x509: invalid authority info access")
 				}
 				var method asn1.ObjectIdentifier
 				if !aiaDER.ReadASN1ObjectIdentifier(&method) {
 					return errors.New("x509: invalid authority info access")
 				}
-				if !aiaDER.PeekASN1Tag(cbasn1.Tag(6).ContextSpecific()) {
+				if !aiaDER.PeekASN1Tag(cryptobyte_asn1.Tag(6).ContextSpecific()) {
 					continue
 				}
-				if !aiaDER.ReadASN1(&aiaDER, cbasn1.Tag(6).ContextSpecific()) {
+				if !aiaDER.ReadASN1(&aiaDER, cryptobyte_asn1.Tag(6).ContextSpecific()) {
 					return errors.New("x509: invalid authority info access")
 				}
 				switch {
@@ -809,26 +810,26 @@ func parseCertificate(der []byte) (*Certificate, error) {
 	// we read the SEQUENCE including length and tag bytes so that
 	// we can populate Certificate.Raw, before unwrapping the
 	// SEQUENCE so it can be operated on
-	if !input.ReadASN1Element(&input, cbasn1.SEQUENCE) {
+	if !input.ReadASN1Element(&input, cryptobyte_asn1.SEQUENCE) {
 		return nil, errors.New("x509: malformed certificate")
 	}
 	cert.Raw = input
-	if !input.ReadASN1(&input, cbasn1.SEQUENCE) {
+	if !input.ReadASN1(&input, cryptobyte_asn1.SEQUENCE) {
 		return nil, errors.New("x509: malformed certificate")
 	}
 
 	var tbs cryptobyte.String
 	// do the same trick again as above to extract the raw
 	// bytes for Certificate.RawTBSCertificate
-	if !input.ReadASN1Element(&tbs, cbasn1.SEQUENCE) {
+	if !input.ReadASN1Element(&tbs, cryptobyte_asn1.SEQUENCE) {
 		return nil, errors.New("x509: malformed tbs certificate")
 	}
 	cert.RawTBSCertificate = tbs
-	if !tbs.ReadASN1(&tbs, cbasn1.SEQUENCE) {
+	if !tbs.ReadASN1(&tbs, cryptobyte_asn1.SEQUENCE) {
 		return nil, errors.New("x509: malformed tbs certificate")
 	}
 
-	if !tbs.ReadOptionalASN1Integer(&cert.Version, cbasn1.Tag(0).Constructed().ContextSpecific(), 0) {
+	if !tbs.ReadOptionalASN1Integer(&cert.Version, cryptobyte_asn1.Tag(0).Constructed().ContextSpecific(), 0) {
 		return nil, errors.New("x509: malformed version")
 	}
 	if cert.Version < 0 {
@@ -853,14 +854,14 @@ func parseCertificate(der []byte) (*Certificate, error) {
 	cert.SerialNumber = serial
 
 	var sigAISeq cryptobyte.String
-	if !tbs.ReadASN1(&sigAISeq, cbasn1.SEQUENCE) {
+	if !tbs.ReadASN1(&sigAISeq, cryptobyte_asn1.SEQUENCE) {
 		return nil, errors.New("x509: malformed signature algorithm identifier")
 	}
 	// Before parsing the inner algorithm identifier, extract
 	// the outer algorithm identifier and make sure that they
 	// match.
 	var outerSigAISeq cryptobyte.String
-	if !input.ReadASN1(&outerSigAISeq, cbasn1.SEQUENCE) {
+	if !input.ReadASN1(&outerSigAISeq, cryptobyte_asn1.SEQUENCE) {
 		return nil, errors.New("x509: malformed algorithm identifier")
 	}
 	if !bytes.Equal(outerSigAISeq, sigAISeq) {
@@ -873,7 +874,7 @@ func parseCertificate(der []byte) (*Certificate, error) {
 	cert.SignatureAlgorithm = getSignatureAlgorithmFromAI(sigAI)
 
 	var issuerSeq cryptobyte.String
-	if !tbs.ReadASN1Element(&issuerSeq, cbasn1.SEQUENCE) {
+	if !tbs.ReadASN1Element(&issuerSeq, cryptobyte_asn1.SEQUENCE) {
 		return nil, errors.New("x509: malformed issuer")
 	}
 	cert.RawIssuer = issuerSeq
@@ -884,7 +885,7 @@ func parseCertificate(der []byte) (*Certificate, error) {
 	cert.Issuer.FillFromRDNSequence(issuerRDNs)
 
 	var validity cryptobyte.String
-	if !tbs.ReadASN1(&validity, cbasn1.SEQUENCE) {
+	if !tbs.ReadASN1(&validity, cryptobyte_asn1.SEQUENCE) {
 		return nil, errors.New("x509: malformed validity")
 	}
 	cert.NotBefore, cert.NotAfter, err = parseValidity(validity)
@@ -893,7 +894,7 @@ func parseCertificate(der []byte) (*Certificate, error) {
 	}
 
 	var subjectSeq cryptobyte.String
-	if !tbs.ReadASN1Element(&subjectSeq, cbasn1.SEQUENCE) {
+	if !tbs.ReadASN1Element(&subjectSeq, cryptobyte_asn1.SEQUENCE) {
 		return nil, errors.New("x509: malformed issuer")
 	}
 	cert.RawSubject = subjectSeq
@@ -904,15 +905,15 @@ func parseCertificate(der []byte) (*Certificate, error) {
 	cert.Subject.FillFromRDNSequence(subjectRDNs)
 
 	var spki cryptobyte.String
-	if !tbs.ReadASN1Element(&spki, cbasn1.SEQUENCE) {
+	if !tbs.ReadASN1Element(&spki, cryptobyte_asn1.SEQUENCE) {
 		return nil, errors.New("x509: malformed spki")
 	}
 	cert.RawSubjectPublicKeyInfo = spki
-	if !spki.ReadASN1(&spki, cbasn1.SEQUENCE) {
+	if !spki.ReadASN1(&spki, cryptobyte_asn1.SEQUENCE) {
 		return nil, errors.New("x509: malformed spki")
 	}
 	var pkAISeq cryptobyte.String
-	if !spki.ReadASN1(&pkAISeq, cbasn1.SEQUENCE) {
+	if !spki.ReadASN1(&pkAISeq, cryptobyte_asn1.SEQUENCE) {
 		return nil, errors.New("x509: malformed public key algorithm identifier")
 	}
 	pkAI, err := parseAI(pkAISeq)
@@ -933,25 +934,25 @@ func parseCertificate(der []byte) (*Certificate, error) {
 	}
 
 	if cert.Version > 1 {
-		if !tbs.SkipOptionalASN1(cbasn1.Tag(1).Constructed().ContextSpecific()) {
+		if !tbs.SkipOptionalASN1(cryptobyte_asn1.Tag(1).Constructed().ContextSpecific()) {
 			return nil, errors.New("x509: malformed issuerUniqueID")
 		}
-		if !tbs.SkipOptionalASN1(cbasn1.Tag(2).Constructed().ContextSpecific()) {
+		if !tbs.SkipOptionalASN1(cryptobyte_asn1.Tag(2).Constructed().ContextSpecific()) {
 			return nil, errors.New("x509: malformed subjectUniqueID")
 		}
 		if cert.Version == 3 {
 			var extensions cryptobyte.String
 			var present bool
-			if !tbs.ReadOptionalASN1(&extensions, &present, cbasn1.Tag(3).Constructed().ContextSpecific()) {
+			if !tbs.ReadOptionalASN1(&extensions, &present, cryptobyte_asn1.Tag(3).Constructed().ContextSpecific()) {
 				return nil, errors.New("x509: malformed extensions")
 			}
 			if present {
-				if !extensions.ReadASN1(&extensions, cbasn1.SEQUENCE) {
+				if !extensions.ReadASN1(&extensions, cryptobyte_asn1.SEQUENCE) {
 					return nil, errors.New("x509: malformed extensions")
 				}
 				for !extensions.Empty() {
 					var extension cryptobyte.String
-					if !extensions.ReadASN1(&extension, cbasn1.SEQUENCE) {
+					if !extensions.ReadASN1(&extension, cryptobyte_asn1.SEQUENCE) {
 						return nil, errors.New("x509: malformed extension")
 					}
 					ext, err := parseExtension(extension)
diff --git a/src/crypto/x509/root.go b/src/crypto/x509/root.go
index cc53f7aefc..eef9c047b2 100644
--- a/src/crypto/x509/root.go
+++ b/src/crypto/x509/root.go
@@ -8,7 +8,7 @@ package x509
 // argument to the latest security_certificates version from
 // https://opensource.apple.com/source/security_certificates/
 // and run "go generate". See https://golang.org/issue/38843.
-//go:generate go run root_ios_gen.go -version 55188.40.9
+//go:generate go run root_ios_gen.go -version 55188.120.1.0.1
 
 import "sync"
 
diff --git a/src/crypto/x509/root_bsd.go b/src/crypto/x509/root_bsd.go
index 822e8573ff..6712ea32a6 100644
--- a/src/crypto/x509/root_bsd.go
+++ b/src/crypto/x509/root_bsd.go
@@ -18,6 +18,7 @@ var certFiles = []string{
 // Possible directories with certificate files; stop after successfully
 // reading at least one file from a directory.
 var certDirectories = []string{
+	"/etc/ssl/certs",         // FreeBSD 12.2+
 	"/usr/local/share/certs", // FreeBSD
 	"/etc/openssl/certs",     // NetBSD
 }
diff --git a/src/crypto/x509/root_ios.go b/src/crypto/x509/root_ios.go
index 50432f3d2c..9bc62f8abb 100644
--- a/src/crypto/x509/root_ios.go
+++ b/src/crypto/x509/root_ios.go
@@ -1,4 +1,4 @@
-// Code generated by root_ios_gen.go -version 55188.40.9; DO NOT EDIT.
+// Code generated by root_ios_gen.go -version 55188.120.1.0.1; DO NOT EDIT.
 // Update the version in root.go and regenerate with "go generate".
 
 //go:build ios && !x509omitbundledroots
@@ -2223,6 +2223,41 @@ uOJAf/sKbvu+M8k8o4TVMAoGCCqGSM49BAMCA0gAMEUCIQDckqGgE6bPA7DmxCGX
 kPoUVy0D7O48027KqGx2vKLeuwIgJ6iFJzWbVsaj8kfSt24bAgAXqmemFZHe+pTs
 ewv4n4Q=
 -----END CERTIFICATE-----
+# "GlobalSign"
+# 2C AB EA FE 37 D0 6C A2 2A BA 73 91 C0 03 3D 25
+# 98 29 52 C4 53 64 73 49 76 3A 3A B5 AD 6C CF 69
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
 # "GlobalSign Root CA"
 # EB D4 10 40 E4 BB 3E C7 42 C9 E3 81 D3 1E F2 A4
 # 1A 48 B6 68 5C 96 E7 CE F3 C1 DF 6C D4 33 1C 99
diff --git a/src/crypto/x509/x509.go b/src/crypto/x509/x509.go
index ff37b361d7..4304ab54e1 100644
--- a/src/crypto/x509/x509.go
+++ b/src/crypto/x509/x509.go
@@ -1413,8 +1413,8 @@ func signingParamsForPublicKey(pub interface{}, requestedSigAlgo SignatureAlgori
 // just an empty SEQUENCE.
 var emptyASN1Subject = []byte{0x30, 0}
 
-// CreateCertificate creates a new X.509v3 certificate based on a template.
-// The following members of template are used:
+// CreateCertificate creates a new X.509 v3 certificate based on a template.
+// The following members of template are currently used:
 //
 //  - AuthorityKeyId
 //  - BasicConstraintsValid
@@ -1451,7 +1451,7 @@ var emptyASN1Subject = []byte{0x30, 0}
 //
 // The certificate is signed by parent. If parent is equal to template then the
 // certificate is self-signed. The parameter pub is the public key of the
-// signee and priv is the private key of the signer.
+// certificate to be generated and priv is the private key of the signer.
 //
 // The returned slice is the certificate in DER encoding.
 //
@@ -1465,7 +1465,7 @@ var emptyASN1Subject = []byte{0x30, 0}
 //
 // If SubjectKeyId from template is empty and the template is a CA, SubjectKeyId
 // will be generated from the hash of the public key.
-func CreateCertificate(rand io.Reader, template, parent *Certificate, pub, priv interface{}) (cert []byte, err error) {
+func CreateCertificate(rand io.Reader, template, parent *Certificate, pub, priv interface{}) ([]byte, error) {
 	key, ok := priv.(crypto.Signer)
 	if !ok {
 		return nil, errors.New("x509: certificate private key does not implement crypto.Signer")
@@ -1491,12 +1491,12 @@ func CreateCertificate(rand io.Reader, template, parent *Certificate, pub, priv
 
 	asn1Issuer, err := subjectBytes(parent)
 	if err != nil {
-		return
+		return nil, err
 	}
 
 	asn1Subject, err := subjectBytes(template)
 	if err != nil {
-		return
+		return nil, err
 	}
 
 	authorityKeyId := template.AuthorityKeyId
@@ -1514,9 +1514,19 @@ func CreateCertificate(rand io.Reader, template, parent *Certificate, pub, priv
 		subjectKeyId = h[:]
 	}
 
+	// Check that the signer's public key matches the private key, if available.
+	type privateKey interface {
+		Equal(crypto.PublicKey) bool
+	}
+	if privPub, ok := key.Public().(privateKey); !ok {
+		return nil, errors.New("x509: internal error: supported public key does not implement Equal")
+	} else if parent.PublicKey != nil && !privPub.Equal(parent.PublicKey) {
+		return nil, errors.New("x509: provided PrivateKey doesn't match parent's PublicKey")
+	}
+
 	extensions, err := buildCertExtensions(template, bytes.Equal(asn1Subject, emptyASN1Subject), authorityKeyId, subjectKeyId)
 	if err != nil {
-		return
+		return nil, err
 	}
 
 	encodedPublicKey := asn1.BitString{BitLength: len(publicKeyBytes) * 8, Bytes: publicKeyBytes}
@@ -1533,7 +1543,7 @@ func CreateCertificate(rand io.Reader, template, parent *Certificate, pub, priv
 
 	tbsCertContents, err := asn1.Marshal(c)
 	if err != nil {
-		return
+		return nil, err
 	}
 	c.Raw = tbsCertContents
 
@@ -1555,7 +1565,7 @@ func CreateCertificate(rand io.Reader, template, parent *Certificate, pub, priv
 	var signature []byte
 	signature, err = key.Sign(rand, signed, signerOpts)
 	if err != nil {
-		return
+		return nil, err
 	}
 
 	signedCert, err := asn1.Marshal(certificate{
diff --git a/src/crypto/x509/x509_test.go b/src/crypto/x509/x509_test.go
index 802bce0f9a..a4053abf41 100644
--- a/src/crypto/x509/x509_test.go
+++ b/src/crypto/x509/x509_test.go
@@ -3174,3 +3174,45 @@ func TestSigAlgMismatch(t *testing.T) {
 		}
 	}
 }
+
+const optionalAuthKeyIDPEM = `-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----`
+
+func TestAuthKeyIdOptional(t *testing.T) {
+	b, _ := pem.Decode([]byte(optionalAuthKeyIDPEM))
+	if b == nil {
+		t.Fatalf("couldn't decode test certificate")
+	}
+	_, err := ParseCertificate(b.Bytes)
+	if err != nil {
+		t.Fatalf("ParseCertificate to failed to parse certificate with optional authority key identifier fields: %s", err)
+	}
+}
diff --git a/src/database/sql/sql_test.go b/src/database/sql/sql_test.go
index 80f63e877d..f771dee4a9 100644
--- a/src/database/sql/sql_test.go
+++ b/src/database/sql/sql_test.go
@@ -2838,7 +2838,7 @@ func TestTxStmtDeadlock(t *testing.T) {
 	db := newTestDB(t, "people")
 	defer closeDB(t, db)
 
-	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Millisecond)
+	ctx, cancel := context.WithCancel(context.Background())
 	defer cancel()
 	tx, err := db.BeginTx(ctx, nil)
 	if err != nil {
@@ -2849,6 +2849,7 @@ func TestTxStmtDeadlock(t *testing.T) {
 	if err != nil {
 		t.Fatal(err)
 	}
+	cancel()
 	// Run number of stmt queries to reproduce deadlock from context cancel
 	for i := 0; i < 1e3; i++ {
 		// Encounter any close related errors (e.g. ErrTxDone, stmt is closed)
diff --git a/src/debug/dwarf/type.go b/src/debug/dwarf/type.go
index 316db258f6..eb5a666ed3 100644
--- a/src/debug/dwarf/type.go
+++ b/src/debug/dwarf/type.go
@@ -292,11 +292,35 @@ func (d *Data) Type(off Offset) (Type, error) {
 	return d.readType("info", d.Reader(), off, d.typeCache, nil)
 }
 
+type typeFixer struct {
+	typedefs   []*TypedefType
+	arraytypes []*Type
+}
+
+func (tf *typeFixer) recordArrayType(t *Type) {
+	if t == nil {
+		return
+	}
+	_, ok := (*t).(*ArrayType)
+	if ok {
+		tf.arraytypes = append(tf.arraytypes, t)
+	}
+}
+
+func (tf *typeFixer) apply() {
+	for _, t := range tf.typedefs {
+		t.Common().ByteSize = t.Type.Size()
+	}
+	for _, t := range tf.arraytypes {
+		zeroArray(t)
+	}
+}
+
 // readType reads a type from r at off of name. It adds types to the
 // type cache, appends new typedef types to typedefs, and computes the
 // sizes of types. Callers should pass nil for typedefs; this is used
 // for internal recursion.
-func (d *Data) readType(name string, r typeReader, off Offset, typeCache map[Offset]Type, typedefs *[]*TypedefType) (Type, error) {
+func (d *Data) readType(name string, r typeReader, off Offset, typeCache map[Offset]Type, fixups *typeFixer) (Type, error) {
 	if t, ok := typeCache[off]; ok {
 		return t, nil
 	}
@@ -311,18 +335,16 @@ func (d *Data) readType(name string, r typeReader, off Offset, typeCache map[Off
 	}
 
 	// If this is the root of the recursion, prepare to resolve
-	// typedef sizes once the recursion is done. This must be done
-	// after the type graph is constructed because it may need to
-	// resolve cycles in a different order than readType
-	// encounters them.
-	if typedefs == nil {
-		var typedefList []*TypedefType
+	// typedef sizes and perform other fixups once the recursion is
+	// done. This must be done after the type graph is constructed
+	// because it may need to resolve cycles in a different order than
+	// readType encounters them.
+	if fixups == nil {
+		var fixer typeFixer
 		defer func() {
-			for _, t := range typedefList {
-				t.Common().ByteSize = t.Type.Size()
-			}
+			fixer.apply()
 		}()
-		typedefs = &typedefList
+		fixups = &fixer
 	}
 
 	// Parse type from Entry.
@@ -376,7 +398,7 @@ func (d *Data) readType(name string, r typeReader, off Offset, typeCache map[Off
 		var t Type
 		switch toff := tval.(type) {
 		case Offset:
-			if t, err = d.readType(name, r.clone(), toff, typeCache, typedefs); err != nil {
+			if t, err = d.readType(name, r.clone(), toff, typeCache, fixups); err != nil {
 				return nil
 			}
 		case uint64:
@@ -567,7 +589,7 @@ func (d *Data) readType(name string, r typeReader, off Offset, typeCache map[Off
 			if bito == lastFieldBitOffset && t.Kind != "union" {
 				// Last field was zero width. Fix array length.
 				// (DWARF writes out 0-length arrays as if they were 1-length arrays.)
-				zeroArray(lastFieldType)
+				fixups.recordArrayType(lastFieldType)
 			}
 			lastFieldType = &f.Type
 			lastFieldBitOffset = bito
@@ -576,7 +598,7 @@ func (d *Data) readType(name string, r typeReader, off Offset, typeCache map[Off
 			b, ok := e.Val(AttrByteSize).(int64)
 			if ok && b*8 == lastFieldBitOffset {
 				// Final field must be zero width. Fix array length.
-				zeroArray(lastFieldType)
+				fixups.recordArrayType(lastFieldType)
 			}
 		}
 
@@ -719,7 +741,7 @@ func (d *Data) readType(name string, r typeReader, off Offset, typeCache map[Off
 				// Record that we need to resolve this
 				// type's size once the type graph is
 				// constructed.
-				*typedefs = append(*typedefs, t)
+				fixups.typedefs = append(fixups.typedefs, t)
 			case *PtrType:
 				b = int64(addressSize)
 			}
@@ -737,11 +759,8 @@ Error:
 }
 
 func zeroArray(t *Type) {
-	if t == nil {
-		return
-	}
-	at, ok := (*t).(*ArrayType)
-	if !ok || at.Type.Size() == 0 {
+	at := (*t).(*ArrayType)
+	if at.Type.Size() == 0 {
 		return
 	}
 	// Make a copy to avoid invalidating typeCache.
diff --git a/src/debug/elf/file.go b/src/debug/elf/file.go
index cd5bf8fab0..b25d8209e3 100644
--- a/src/debug/elf/file.go
+++ b/src/debug/elf/file.go
@@ -1164,6 +1164,13 @@ func (f *File) DWARF() (*dwarf.Data, error) {
 			b = dbuf
 		}
 
+		if f.Type == ET_EXEC {
+			// Do not apply relocations to DWARF sections for ET_EXEC binaries.
+			// Relocations should already be applied, and .rela sections may
+			// contain incorrect data.
+			return b, nil
+		}
+
 		for _, r := range f.Sections {
 			if r.Type != SHT_RELA && r.Type != SHT_REL {
 				continue
diff --git a/src/debug/macho/macho.go b/src/debug/macho/macho.go
index 49e107eed3..9fa9f95752 100644
--- a/src/debug/macho/macho.go
+++ b/src/debug/macho/macho.go
@@ -4,7 +4,7 @@
 
 // Mach-O header data structures
 // Originally at:
-// http://developer.apple.com/mac/library/documentation/DeveloperTools/Conceptual/MachORuntime/Reference/reference.html (since deleted by Apply)
+// http://developer.apple.com/mac/library/documentation/DeveloperTools/Conceptual/MachORuntime/Reference/reference.html (since deleted by Apple)
 // Archived copy at:
 // https://web.archive.org/web/20090819232456/http://developer.apple.com/documentation/DeveloperTools/Conceptual/MachORuntime/index.html
 // For cloned PDF see:
diff --git a/src/fmt/doc.go b/src/fmt/doc.go
index d05ee519c3..c584cc9465 100644
--- a/src/fmt/doc.go
+++ b/src/fmt/doc.go
@@ -189,7 +189,7 @@
 	When printing a struct, fmt cannot and therefore does not invoke
 	formatting methods such as Error or String on unexported fields.
 
-	Explicit argument indexes:
+	Explicit argument indexes
 
 	In Printf, Sprintf, and Fprintf, the default behavior is for each
 	formatting verb to format successive arguments passed in the call.
@@ -211,7 +211,7 @@
 		fmt.Sprintf("%d %d %#[1]x %#x", 16, 17)
 	will yield "16 17 0x10 0x11".
 
-	Format errors:
+	Format errors
 
 	If an invalid argument is given for a verb, such as providing
 	a string to %d, the generated string will contain a
diff --git a/src/go.mod b/src/go.mod
index a3ceb05890..379dcf504e 100644
--- a/src/go.mod
+++ b/src/go.mod
@@ -4,7 +4,7 @@ go 1.17
 
 require (
 	golang.org/x/crypto v0.0.0-20210503195802-e9a32991a82e
-	golang.org/x/net v0.0.0-20210505024714-0287a6fb4125
-	golang.org/x/sys v0.0.0-20210503173754-0981d6026fa6 // indirect
+	golang.org/x/net v0.0.0-20210510120150-4163338589ed
+	golang.org/x/sys v0.0.0-20210511113859-b0526f3d8744 // indirect
 	golang.org/x/text v0.3.7-0.20210503195748-5c7c50ebbd4f // indirect
 )
diff --git a/src/go.sum b/src/go.sum
index 27513a350d..6e869b96f7 100644
--- a/src/go.sum
+++ b/src/go.sum
@@ -1,8 +1,15 @@
 golang.org/x/crypto v0.0.0-20210503195802-e9a32991a82e h1:8foAy0aoO5GkqCvAEJ4VC4P3zksTg4X4aJCDpZzmgQI=
 golang.org/x/crypto v0.0.0-20210503195802-e9a32991a82e/go.mod h1:P+XmwS30IXTQdn5tA2iutPOUgjI07+tq3H3K9MVA1s8=
-golang.org/x/net v0.0.0-20210505024714-0287a6fb4125 h1:Ugb8sMTWuWRC3+sz5WeN/4kejDx9BvIwnPUiJBjJE+8=
-golang.org/x/net v0.0.0-20210505024714-0287a6fb4125/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
-golang.org/x/sys v0.0.0-20210503173754-0981d6026fa6 h1:cdsMqa2nXzqlgs183pHxtvoVwU7CyzaCTAUOg94af4c=
-golang.org/x/sys v0.0.0-20210503173754-0981d6026fa6/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
+golang.org/x/net v0.0.0-20210510120150-4163338589ed h1:p9UgmWI9wKpfYmgaV/IZKGdXc5qEK45tDwwwDyjS26I=
+golang.org/x/net v0.0.0-20210510120150-4163338589ed/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
+golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210423082822-04245dca01da/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210511113859-b0526f3d8744 h1:yhBbb4IRs2HS9PPlAg6DMC6mUOKexJBNsLf4Z+6En1Q=
+golang.org/x/sys v0.0.0-20210511113859-b0526f3d8744/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
+golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
+golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/text v0.3.7-0.20210503195748-5c7c50ebbd4f h1:yQJrRE0hDxDFmZLlRaw+3vusO4fwNHgHIjUOMO7bHYI=
 golang.org/x/text v0.3.7-0.20210503195748-5c7c50ebbd4f/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
+golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
diff --git a/src/go/ast/ast.go b/src/go/ast/ast.go
index c87529ec77..337c87fd79 100644
--- a/src/go/ast/ast.go
+++ b/src/go/ast/ast.go
@@ -259,7 +259,7 @@ func (f *FieldList) End() token.Pos {
 	return token.NoPos
 }
 
-// NumFields returns the number of (type) parameters or struct fields represented by a FieldList.
+// NumFields returns the number of parameters or struct fields represented by a FieldList.
 func (f *FieldList) NumFields() int {
 	n := 0
 	if f != nil {
@@ -973,10 +973,6 @@ type (
 	}
 )
 
-func (f *FuncDecl) IsMethod() bool {
-	return f.Recv.NumFields() != 0
-}
-
 // Pos and End implementations for declaration nodes.
 
 func (d *BadDecl) Pos() token.Pos  { return d.From }
diff --git a/src/go/build/build.go b/src/go/build/build.go
index c5895290e4..6e8a89a392 100644
--- a/src/go/build/build.go
+++ b/src/go/build/build.go
@@ -810,6 +810,17 @@ Found:
 	}
 
 	var badGoError error
+	badFiles := make(map[string]bool)
+	badFile := func(name string, err error) {
+		if badGoError == nil {
+			badGoError = err
+		}
+		if !badFiles[name] {
+			p.InvalidGoFiles = append(p.InvalidGoFiles, name)
+			badFiles[name] = true
+		}
+	}
+
 	var Sfiles []string // files with ".S"(capital S)/.sx(capital s equivalent for case insensitive filesystems)
 	var firstFile, firstCommentFile string
 	embedPos := make(map[string][]token.Position)
@@ -834,16 +845,9 @@ Found:
 		name := d.Name()
 		ext := nameExt(name)
 
-		badFile := func(err error) {
-			if badGoError == nil {
-				badGoError = err
-			}
-			p.InvalidGoFiles = append(p.InvalidGoFiles, name)
-		}
-
 		info, err := ctxt.matchFile(p.Dir, name, allTags, &p.BinaryOnly, fset)
 		if err != nil {
-			badFile(err)
+			badFile(name, err)
 			continue
 		}
 		if info == nil {
@@ -874,15 +878,18 @@ Found:
 		}
 
 		if info.parseErr != nil {
-			badFile(info.parseErr)
-			continue
+			badFile(name, info.parseErr)
+			// Fall through: we might still have a partial AST in info.parsed,
+			// and we want to list files with parse errors anyway.
 		}
-		pf := info.parsed
 
-		pkg := pf.Name.Name
-		if pkg == "documentation" {
-			p.IgnoredGoFiles = append(p.IgnoredGoFiles, name)
-			continue
+		var pkg string
+		if info.parsed != nil {
+			pkg = info.parsed.Name.Name
+			if pkg == "documentation" {
+				p.IgnoredGoFiles = append(p.IgnoredGoFiles, name)
+				continue
+			}
 		}
 
 		isTest := strings.HasSuffix(name, "_test.go")
@@ -896,16 +903,18 @@ Found:
 			p.Name = pkg
 			firstFile = name
 		} else if pkg != p.Name {
-			badFile(&MultiplePackageError{
+			// TODO(#45999): The choice of p.Name is arbitrary based on file iteration
+			// order. Instead of resolving p.Name arbitrarily, we should clear out the
+			// existing name and mark the existing files as also invalid.
+			badFile(name, &MultiplePackageError{
 				Dir:      p.Dir,
 				Packages: []string{p.Name, pkg},
 				Files:    []string{firstFile, name},
 			})
-			p.InvalidGoFiles = append(p.InvalidGoFiles, name)
 		}
 		// Grab the first package comment as docs, provided it is not from a test file.
-		if pf.Doc != nil && p.Doc == "" && !isTest && !isXTest {
-			p.Doc = doc.Synopsis(pf.Doc.Text())
+		if info.parsed != nil && info.parsed.Doc != nil && p.Doc == "" && !isTest && !isXTest {
+			p.Doc = doc.Synopsis(info.parsed.Doc.Text())
 		}
 
 		if mode&ImportComment != 0 {
@@ -913,12 +922,12 @@ Found:
 			if line != 0 {
 				com, err := strconv.Unquote(qcom)
 				if err != nil {
-					badFile(fmt.Errorf("%s:%d: cannot parse import comment", filename, line))
+					badFile(name, fmt.Errorf("%s:%d: cannot parse import comment", filename, line))
 				} else if p.ImportComment == "" {
 					p.ImportComment = com
 					firstCommentFile = name
 				} else if p.ImportComment != com {
-					badFile(fmt.Errorf("found import comments %q (%s) and %q (%s) in %s", p.ImportComment, firstCommentFile, com, name, p.Dir))
+					badFile(name, fmt.Errorf("found import comments %q (%s) and %q (%s) in %s", p.ImportComment, firstCommentFile, com, name, p.Dir))
 				}
 			}
 		}
@@ -928,13 +937,13 @@ Found:
 		for _, imp := range info.imports {
 			if imp.path == "C" {
 				if isTest {
-					badFile(fmt.Errorf("use of cgo in test %s not supported", filename))
+					badFile(name, fmt.Errorf("use of cgo in test %s not supported", filename))
 					continue
 				}
 				isCgo = true
 				if imp.doc != nil {
 					if err := ctxt.saveCgo(filename, p, imp.doc); err != nil {
-						badFile(err)
+						badFile(name, err)
 					}
 				}
 			}
diff --git a/src/go/build/build_test.go b/src/go/build/build_test.go
index 7e78568083..80f930f3c2 100644
--- a/src/go/build/build_test.go
+++ b/src/go/build/build_test.go
@@ -104,7 +104,8 @@ func TestEmptyFolderImport(t *testing.T) {
 }
 
 func TestMultiplePackageImport(t *testing.T) {
-	_, err := Import(".", "testdata/multi", 0)
+	pkg, err := Import(".", "testdata/multi", 0)
+
 	mpe, ok := err.(*MultiplePackageError)
 	if !ok {
 		t.Fatal(`Import("testdata/multi") did not return MultiplePackageError.`)
@@ -115,7 +116,20 @@ func TestMultiplePackageImport(t *testing.T) {
 		Files:    []string{"file.go", "file_appengine.go"},
 	}
 	if !reflect.DeepEqual(mpe, want) {
-		t.Errorf("got %#v; want %#v", mpe, want)
+		t.Errorf("err = %#v; want %#v", mpe, want)
+	}
+
+	// TODO(#45999): Since the name is ambiguous, pkg.Name should be left empty.
+	if wantName := "main"; pkg.Name != wantName {
+		t.Errorf("pkg.Name = %q; want %q", pkg.Name, wantName)
+	}
+
+	if wantGoFiles := []string{"file.go", "file_appengine.go"}; !reflect.DeepEqual(pkg.GoFiles, wantGoFiles) {
+		t.Errorf("pkg.GoFiles = %q; want %q", pkg.GoFiles, wantGoFiles)
+	}
+
+	if wantInvalidFiles := []string{"file_appengine.go"}; !reflect.DeepEqual(pkg.InvalidGoFiles, wantInvalidFiles) {
+		t.Errorf("pkg.InvalidGoFiles = %q; want %q", pkg.InvalidGoFiles, wantInvalidFiles)
 	}
 }
 
diff --git a/src/go/build/constraint/expr.go b/src/go/build/constraint/expr.go
index 1ef707ceac..957eb9b527 100644
--- a/src/go/build/constraint/expr.go
+++ b/src/go/build/constraint/expr.go
@@ -426,6 +426,9 @@ func parsePlusBuildExpr(text string) Expr {
 			x = or(x, y)
 		}
 	}
+	if x == nil {
+		x = tag("ignore")
+	}
 	return x
 }
 
diff --git a/src/go/build/constraint/expr_test.go b/src/go/build/constraint/expr_test.go
index 4979f8b5f2..15d189012e 100644
--- a/src/go/build/constraint/expr_test.go
+++ b/src/go/build/constraint/expr_test.go
@@ -216,6 +216,7 @@ var parsePlusBuildExprTests = []struct {
 	{"!!x", tag("ignore")},
 	{"!x", not(tag("x"))},
 	{"!", tag("ignore")},
+	{"", tag("ignore")},
 }
 
 func TestParsePlusBuildExpr(t *testing.T) {
@@ -232,19 +233,22 @@ func TestParsePlusBuildExpr(t *testing.T) {
 var constraintTests = []struct {
 	in  string
 	x   Expr
-	err error
+	err string
 }{
-	{"//+build x y", or(tag("x"), tag("y")), nil},
-	{"// +build x y \n", or(tag("x"), tag("y")), nil},
-	{"// +build x y \n ", nil, errNotConstraint},
-	{"// +build x y \nmore", nil, errNotConstraint},
-	{" //+build x y", nil, errNotConstraint},
+	{"//+build !", tag("ignore"), ""},
+	{"//+build", tag("ignore"), ""},
+	{"//+build x y", or(tag("x"), tag("y")), ""},
+	{"// +build x y \n", or(tag("x"), tag("y")), ""},
+	{"// +build x y \n ", nil, "not a build constraint"},
+	{"// +build x y \nmore", nil, "not a build constraint"},
+	{" //+build x y", nil, "not a build constraint"},
 
-	{"//go:build x && y", and(tag("x"), tag("y")), nil},
-	{"//go:build x && y\n", and(tag("x"), tag("y")), nil},
-	{"//go:build x && y\n ", nil, errNotConstraint},
-	{"//go:build x && y\nmore", nil, errNotConstraint},
-	{" //go:build x && y", nil, errNotConstraint},
+	{"//go:build x && y", and(tag("x"), tag("y")), ""},
+	{"//go:build x && y\n", and(tag("x"), tag("y")), ""},
+	{"//go:build x && y\n ", nil, "not a build constraint"},
+	{"//go:build x && y\nmore", nil, "not a build constraint"},
+	{" //go:build x && y", nil, "not a build constraint"},
+	{"//go:build\n", nil, "unexpected end of expression"},
 }
 
 func TestParse(t *testing.T) {
@@ -252,14 +256,14 @@ func TestParse(t *testing.T) {
 		t.Run(fmt.Sprint(i), func(t *testing.T) {
 			x, err := Parse(tt.in)
 			if err != nil {
-				if tt.err == nil {
+				if tt.err == "" {
 					t.Errorf("Constraint(%q): unexpected error: %v", tt.in, err)
-				} else if tt.err != err {
+				} else if !strings.Contains(err.Error(), tt.err) {
 					t.Errorf("Constraint(%q): error %v, want %v", tt.in, err, tt.err)
 				}
 				return
 			}
-			if tt.err != nil {
+			if tt.err != "" {
 				t.Errorf("Constraint(%q) = %v, want error %v", tt.in, x, tt.err)
 				return
 			}
diff --git a/src/go/build/deps_test.go b/src/go/build/deps_test.go
index a2423cf0d9..c399946435 100644
--- a/src/go/build/deps_test.go
+++ b/src/go/build/deps_test.go
@@ -395,6 +395,7 @@ var depsRules = `
 	< crypto
 	< crypto/subtle
 	< crypto/internal/subtle
+	< crypto/elliptic/internal/fiat
 	< crypto/ed25519/internal/edwards25519/field
 	< crypto/ed25519/internal/edwards25519
 	< crypto/cipher
@@ -443,7 +444,8 @@ var depsRules = `
 	# HTTP, King of Dependencies.
 
 	FMT
-	< golang.org/x/net/http2/hpack, net/http/internal;
+	< golang.org/x/net/http2/hpack
+	< net/http/internal, net/http/internal/ascii, net/http/internal/testcert;
 
 	FMT, NET, container/list, encoding/binary, log
 	< golang.org/x/text/transform
@@ -461,6 +463,8 @@ var depsRules = `
 	golang.org/x/net/http/httpproxy,
 	golang.org/x/net/http2/hpack,
 	net/http/internal,
+	net/http/internal/ascii,
+	net/http/internal/testcert,
 	net/http/httptrace,
 	mime/multipart,
 	log
@@ -471,7 +475,7 @@ var depsRules = `
 	encoding/json, net/http
 	< expvar;
 
-	net/http
+	net/http, net/http/internal/ascii
 	< net/http/cookiejar, net/http/httputil;
 
 	net/http, flag
diff --git a/src/go/build/doc.go b/src/go/build/doc.go
index 2c6f0a83be..778b4f40f7 100644
--- a/src/go/build/doc.go
+++ b/src/go/build/doc.go
@@ -59,7 +59,7 @@
 //
 // A build constraint, also known as a build tag, is a line comment that begins
 //
-// 	// +build
+// 	//go:build
 //
 // that lists the conditions under which a file should be included in the
 // package. Build constraints may also be part of a file's name
diff --git a/src/go/build/read.go b/src/go/build/read.go
index aa7c6ee59e..b98c7938a8 100644
--- a/src/go/build/read.go
+++ b/src/go/build/read.go
@@ -6,6 +6,7 @@ package build
 
 import (
 	"bufio"
+	"bytes"
 	"errors"
 	"fmt"
 	"go/ast"
@@ -28,9 +29,19 @@ type importReader struct {
 	pos  token.Position
 }
 
+var bom = []byte{0xef, 0xbb, 0xbf}
+
 func newImportReader(name string, r io.Reader) *importReader {
+	b := bufio.NewReader(r)
+	// Remove leading UTF-8 BOM.
+	// Per https://golang.org/ref/spec#Source_code_representation:
+	// a compiler may ignore a UTF-8-encoded byte order mark (U+FEFF)
+	// if it is the first Unicode code point in the source text.
+	if leadingBytes, err := b.Peek(3); err == nil && bytes.Equal(leadingBytes, bom) {
+		b.Discard(3)
+	}
 	return &importReader{
-		b: bufio.NewReader(r),
+		b: b,
 		pos: token.Position{
 			Filename: name,
 			Line:     1,
diff --git a/src/go/build/read_test.go b/src/go/build/read_test.go
index 32e6bae008..1e5e1c2de2 100644
--- a/src/go/build/read_test.go
+++ b/src/go/build/read_test.go
@@ -66,6 +66,10 @@ var readGoInfoTests = []readTest{
 		`,
 		"",
 	},
+	{
+		"\ufeff𝔻" + `package p; import "x";ℙvar x = 1`,
+		"",
+	},
 }
 
 var readCommentsTests = []readTest{
@@ -81,6 +85,10 @@ var readCommentsTests = []readTest{
 		`ℙpackage p; import . "x"`,
 		"",
 	},
+	{
+		"\ufeff𝔻" + `ℙpackage p; import . "x"`,
+		"",
+	},
 	{
 		`// foo
 
@@ -90,6 +98,19 @@ var readCommentsTests = []readTest{
 
 		/*/ zot */
 
+		// asdf
+		ℙHello, world`,
+		"",
+	},
+	{
+		"\ufeff𝔻" + `// foo
+
+		/* bar */
+
+		/* quux */ // baz
+
+		/*/ zot */
+
 		// asdf
 		ℙHello, world`,
 		"",
@@ -107,6 +128,11 @@ func testRead(t *testing.T, tests []readTest, read func(io.Reader) ([]byte, erro
 			in = tt.in[:j] + tt.in[j+len("ℙ"):]
 			testOut = tt.in[:j]
 		}
+		d := strings.Index(tt.in, "𝔻")
+		if d >= 0 {
+			in = in[:d] + in[d+len("𝔻"):]
+			testOut = testOut[d+len("𝔻"):]
+		}
 		r := strings.NewReader(in)
 		buf, err := read(r)
 		if err != nil {
@@ -264,6 +290,12 @@ var readEmbedTests = []struct {
 		 test:3:14:y
 		 test:3:16:z`,
 	},
+	{
+		"\ufeffpackage p\nimport \"embed\"\n//go:embed x y z\nvar files embed.FS",
+		`test:3:12:x
+		 test:3:14:y
+		 test:3:16:z`,
+	},
 	{
 		"package p\nimport \"embed\"\nvar s = \"/*\"\n//go:embed x\nvar files embed.FS",
 		`test:4:12:x`,
@@ -292,6 +324,10 @@ var readEmbedTests = []struct {
 		"package p\n//go:embed x y z\nvar files embed.FS", // no import, no scan
 		"",
 	},
+	{
+		"\ufeffpackage p\n//go:embed x y z\nvar files embed.FS", // no import, no scan
+		"",
+	},
 }
 
 func TestReadEmbed(t *testing.T) {
diff --git a/src/go/build/syslist.go b/src/go/build/syslist.go
index 1275f7c986..60ac5511bd 100644
--- a/src/go/build/syslist.go
+++ b/src/go/build/syslist.go
@@ -8,4 +8,4 @@ package build
 // Do not remove from this list, as these are used for go/build filename matching.
 
 const goosList = "aix android darwin dragonfly freebsd hurd illumos ios js linux nacl netbsd openbsd plan9 solaris windows zos "
-const goarchList = "386 amd64 amd64p32 arm armbe arm64 arm64be ppc64 ppc64le mips mipsle mips64 mips64le mips64p32 mips64p32le ppc riscv riscv64 s390 s390x sparc sparc64 wasm "
+const goarchList = "386 amd64 amd64p32 arm armbe arm64 arm64be ppc64 ppc64le loong64 mips mipsle mips64 mips64le mips64p32 mips64p32le ppc riscv riscv64 s390 s390x sparc sparc64 wasm "
diff --git a/src/go/internal/gcimporter/gcimporter.go b/src/go/internal/gcimporter/gcimporter.go
index b74daca246..73cf6334fd 100644
--- a/src/go/internal/gcimporter/gcimporter.go
+++ b/src/go/internal/gcimporter/gcimporter.go
@@ -145,17 +145,14 @@ func Import(fset *token.FileSet, packages map[string]*types.Package, path, srcDi
 		err = fmt.Errorf("import %q: old textual export format no longer supported (recompile library)", path)
 
 	case "$$B\n":
-		var data []byte
-		data, err = io.ReadAll(buf)
-		if err != nil {
-			break
-		}
+		var exportFormat byte
+		exportFormat, err = buf.ReadByte()
 
 		// The indexed export format starts with an 'i'; the older
 		// binary export format starts with a 'c', 'd', or 'v'
 		// (from "version"). Select appropriate importer.
-		if len(data) > 0 && data[0] == 'i' {
-			_, pkg, err = iImportData(fset, packages, data[1:], id)
+		if err == nil && exportFormat == 'i' {
+			pkg, err = iImportData(fset, packages, buf, id)
 		} else {
 			err = fmt.Errorf("import %q: old binary export format no longer supported (recompile library)", path)
 		}
diff --git a/src/go/internal/gcimporter/iimport.go b/src/go/internal/gcimporter/iimport.go
index a3184e7641..76d47d08f1 100644
--- a/src/go/internal/gcimporter/iimport.go
+++ b/src/go/internal/gcimporter/iimport.go
@@ -8,6 +8,7 @@
 package gcimporter
 
 import (
+	"bufio"
 	"bytes"
 	"encoding/binary"
 	"fmt"
@@ -20,7 +21,7 @@ import (
 )
 
 type intReader struct {
-	*bytes.Reader
+	*bufio.Reader
 	path string
 }
 
@@ -61,7 +62,7 @@ const (
 // and returns the number of bytes consumed and a reference to the package.
 // If the export data version is not recognized or the format is otherwise
 // compromised, an error is returned.
-func iImportData(fset *token.FileSet, imports map[string]*types.Package, data []byte, path string) (_ int, pkg *types.Package, err error) {
+func iImportData(fset *token.FileSet, imports map[string]*types.Package, dataReader *bufio.Reader, path string) (pkg *types.Package, err error) {
 	const currentVersion = 1
 	version := int64(-1)
 	defer func() {
@@ -74,7 +75,7 @@ func iImportData(fset *token.FileSet, imports map[string]*types.Package, data []
 		}
 	}()
 
-	r := &intReader{bytes.NewReader(data), path}
+	r := &intReader{dataReader, path}
 
 	version = int64(r.uint64())
 	switch version {
@@ -86,10 +87,12 @@ func iImportData(fset *token.FileSet, imports map[string]*types.Package, data []
 	sLen := int64(r.uint64())
 	dLen := int64(r.uint64())
 
-	whence, _ := r.Seek(0, io.SeekCurrent)
-	stringData := data[whence : whence+sLen]
-	declData := data[whence+sLen : whence+sLen+dLen]
-	r.Seek(sLen+dLen, io.SeekCurrent)
+	data := make([]byte, sLen+dLen)
+	if _, err := io.ReadFull(r, data); err != nil {
+		errorf("cannot read %d bytes of stringData and declData: %s", len(data), err)
+	}
+	stringData := data[:sLen]
+	declData := data[sLen:]
 
 	p := iimporter{
 		ipath:   path,
@@ -165,9 +168,7 @@ func iImportData(fset *token.FileSet, imports map[string]*types.Package, data []
 
 	// package was imported completely and without errors
 	localpkg.MarkComplete()
-
-	consumed, _ := r.Seek(0, io.SeekCurrent)
-	return int(consumed), localpkg, nil
+	return localpkg, nil
 }
 
 type iimporter struct {
diff --git a/src/go/parser/parser.go b/src/go/parser/parser.go
index 3965641713..f10c8650af 100644
--- a/src/go/parser/parser.go
+++ b/src/go/parser/parser.go
@@ -1302,7 +1302,12 @@ func (p *parser) parseIndexOrSliceOrInstance(x ast.Expr) ast.Expr {
 		p.errorExpected(p.pos, "operand")
 		rbrack := p.pos
 		p.next()
-		return &ast.BadExpr{From: x.Pos(), To: rbrack}
+		return &ast.IndexExpr{
+			X:      x,
+			Lbrack: lbrack,
+			Index:  &ast.BadExpr{From: rbrack, To: rbrack},
+			Rbrack: rbrack,
+		}
 	}
 	p.exprLev++
 
diff --git a/src/go/scanner/scanner.go b/src/go/scanner/scanner.go
index 29cbf39721..f08e28cdd6 100644
--- a/src/go/scanner/scanner.go
+++ b/src/go/scanner/scanner.go
@@ -373,7 +373,7 @@ func (s *Scanner) scanIdentifier() string {
 			continue
 		}
 		s.rdOffset += rdOffset
-		if b < utf8.RuneSelf {
+		if 0 < b && b < utf8.RuneSelf {
 			// Optimization: we've encountered an ASCII character that's not a letter
 			// or number. Avoid the call into s.next() and corresponding set up.
 			//
diff --git a/src/go/scanner/scanner_test.go b/src/go/scanner/scanner_test.go
index ac8d257716..db123c32e0 100644
--- a/src/go/scanner/scanner_test.go
+++ b/src/go/scanner/scanner_test.go
@@ -812,6 +812,8 @@ var errors = []struct {
 	{"//\ufeff", token.COMMENT, 2, "//\ufeff", "illegal byte order mark"},                                // only first BOM is ignored
 	{"'\ufeff" + `'`, token.CHAR, 1, "'\ufeff" + `'`, "illegal byte order mark"},                         // only first BOM is ignored
 	{`"` + "abc\ufeffdef" + `"`, token.STRING, 4, `"` + "abc\ufeffdef" + `"`, "illegal byte order mark"}, // only first BOM is ignored
+	{"abc\x00def", token.IDENT, 3, "abc", "illegal character NUL"},
+	{"abc\x00", token.IDENT, 3, "abc", "illegal character NUL"},
 }
 
 func TestScanErrors(t *testing.T) {
diff --git a/src/go/token/position.go b/src/go/token/position.go
index bbcd8b022b..0d7982c670 100644
--- a/src/go/token/position.go
+++ b/src/go/token/position.go
@@ -278,7 +278,7 @@ func (f *File) Pos(offset int) Pos {
 //
 func (f *File) Offset(p Pos) int {
 	if int(p) < f.base || int(p) > f.base+f.size {
-		panic(fmt.Sprintf("invalid Pos value %d (should be in [%d, %d[)", p, f.base, f.base+f.size))
+		panic(fmt.Sprintf("invalid Pos value %d (should be in [%d, %d])", p, f.base, f.base+f.size))
 	}
 	return int(p) - f.base
 }
@@ -346,7 +346,7 @@ func (f *File) position(p Pos, adjusted bool) (pos Position) {
 func (f *File) PositionFor(p Pos, adjusted bool) (pos Position) {
 	if p != NoPos {
 		if int(p) < f.base || int(p) > f.base+f.size {
-			panic(fmt.Sprintf("invalid Pos value %d (should be in [%d, %d[)", p, f.base, f.base+f.size))
+			panic(fmt.Sprintf("invalid Pos value %d (should be in [%d, %d])", p, f.base, f.base+f.size))
 		}
 		pos = f.position(p, adjusted)
 	}
diff --git a/src/go/types/api.go b/src/go/types/api.go
index ed62a785d6..8c0d9d22bf 100644
--- a/src/go/types/api.go
+++ b/src/go/types/api.go
@@ -101,12 +101,12 @@ type ImporterFrom interface {
 // A Config specifies the configuration for type checking.
 // The zero value for Config is a ready-to-use default configuration.
 type Config struct {
-	// GoVersion describes the accepted Go language version. The string
+	// goVersion describes the accepted Go language version. The string
 	// must follow the format "go%d.%d" (e.g. "go1.12") or it must be
 	// empty; an empty string indicates the latest language version.
 	// If the format is invalid, invoking the type checker will cause a
 	// panic.
-	GoVersion string
+	goVersion string
 
 	// If IgnoreFuncBodies is set, function bodies are not
 	// type-checked.
diff --git a/src/go/types/api_test.go b/src/go/types/api_test.go
index f37b91d5a4..f964c656f9 100644
--- a/src/go/types/api_test.go
+++ b/src/go/types/api_test.go
@@ -322,6 +322,18 @@ func TestTypesInfo(t *testing.T) {
 			`[][]struct{}`,
 		},
 
+		// issue 47243
+		{`package issue47243_a; var x int32; var _ = x << 3`, `3`, `untyped int`},
+		{`package issue47243_b; var x int32; var _ = x << 3.`, `3.`, `uint`}, // issue 47410: should be untyped float
+		{`package issue47243_c; var x int32; var _ = 1 << x`, `1 << x`, `int`},
+		{`package issue47243_d; var x int32; var _ = 1 << x`, `1`, `int`},
+		{`package issue47243_e; var x int32; var _ = 1 << 2`, `1`, `untyped int`},
+		{`package issue47243_f; var x int32; var _ = 1 << 2`, `2`, `untyped int`},
+		{`package issue47243_g; var x int32; var _ = int(1) << 2`, `2`, `untyped int`},
+		{`package issue47243_h; var x int32; var _ = 1 << (2 << x)`, `1`, `int`},
+		{`package issue47243_i; var x int32; var _ = 1 << (2 << x)`, `(2 << x)`, `untyped int`},
+		{`package issue47243_j; var x int32; var _ = 1 << (2 << x)`, `2`, `untyped int`},
+
 		// tests for broken code that doesn't parse or type-check
 		{broken + `x0; func _() { var x struct {f string}; x.f := 0 }`, `x.f`, `string`},
 		{broken + `x1; func _() { var z string; type x struct {f string}; y := &x{q: z}}`, `z`, `string`},
diff --git a/src/go/types/builtins.go b/src/go/types/builtins.go
index 739051cc61..2a2d54da88 100644
--- a/src/go/types/builtins.go
+++ b/src/go/types/builtins.go
@@ -588,6 +588,11 @@ func (check *Checker) builtin(x *operand, call *ast.CallExpr, id builtinId) (_ b
 
 	case _Add:
 		// unsafe.Add(ptr unsafe.Pointer, len IntegerType) unsafe.Pointer
+		if !check.allowVersion(check.pkg, 1, 17) {
+			check.errorf(call.Fun, _InvalidUnsafeAdd, "unsafe.Add requires go1.17 or later")
+			return
+		}
+
 		check.assignment(x, Typ[UnsafePointer], "argument to unsafe.Add")
 		if x.mode == invalid {
 			return
@@ -684,6 +689,11 @@ func (check *Checker) builtin(x *operand, call *ast.CallExpr, id builtinId) (_ b
 
 	case _Slice:
 		// unsafe.Slice(ptr *T, len IntegerType) []T
+		if !check.allowVersion(check.pkg, 1, 17) {
+			check.errorf(call.Fun, _InvalidUnsafeSlice, "unsafe.Slice requires go1.17 or later")
+			return
+		}
+
 		typ := asPointer(x.typ)
 		if typ == nil {
 			check.invalidArg(x, _InvalidUnsafeSlice, "%s is not a pointer", x)
diff --git a/src/go/types/check.go b/src/go/types/check.go
index 25ea4906be..a923c3c612 100644
--- a/src/go/types/check.go
+++ b/src/go/types/check.go
@@ -179,9 +179,9 @@ func NewChecker(conf *Config, fset *token.FileSet, pkg *Package, info *Info) *Ch
 		info = new(Info)
 	}
 
-	version, err := parseGoVersion(conf.GoVersion)
+	version, err := parseGoVersion(conf.goVersion)
 	if err != nil {
-		panic(fmt.Sprintf("invalid Go version %q (%v)", conf.GoVersion, err))
+		panic(fmt.Sprintf("invalid Go version %q (%v)", conf.goVersion, err))
 	}
 
 	return &Checker{
diff --git a/src/go/types/check_test.go b/src/go/types/check_test.go
index c5dc93eade..f83abf11ce 100644
--- a/src/go/types/check_test.go
+++ b/src/go/types/check_test.go
@@ -202,17 +202,20 @@ func asGoVersion(s string) string {
 	return ""
 }
 
-func checkFiles(t *testing.T, sizes Sizes, goVersion string, filenames []string, srcs [][]byte, manual bool) {
+func checkFiles(t *testing.T, sizes Sizes, goVersion string, filenames []string, srcs [][]byte, manual bool, imp Importer) {
 	if len(filenames) == 0 {
 		t.Fatal("no source files")
 	}
 
+	if strings.HasSuffix(filenames[0], ".go2") && !typeparams.Enabled {
+		t.Skip("type params are not enabled")
+	}
+	if strings.HasSuffix(filenames[0], ".go1") && typeparams.Enabled {
+		t.Skip("type params are enabled")
+	}
+
 	mode := parser.AllErrors
-	if strings.HasSuffix(filenames[0], ".go2") {
-		if !typeparams.Enabled {
-			t.Skip("type params are not enabled")
-		}
-	} else {
+	if !strings.HasSuffix(filenames[0], ".go2") {
 		mode |= typeparams.DisallowParsing
 	}
 
@@ -240,7 +243,7 @@ func checkFiles(t *testing.T, sizes Sizes, goVersion string, filenames []string,
 	// typecheck and collect typechecker errors
 	var conf Config
 	conf.Sizes = sizes
-	conf.GoVersion = goVersion
+	SetGoVersion(&conf, goVersion)
 
 	// special case for importC.src
 	if len(filenames) == 1 {
@@ -249,7 +252,10 @@ func checkFiles(t *testing.T, sizes Sizes, goVersion string, filenames []string,
 		}
 	}
 
-	conf.Importer = importer.Default()
+	conf.Importer = imp
+	if imp == nil {
+		conf.Importer = importer.Default()
+	}
 	conf.Error = func(err error) {
 		if *haltOnError {
 			defer panic(err)
@@ -319,7 +325,7 @@ func TestManual(t *testing.T) {
 func TestLongConstants(t *testing.T) {
 	format := "package longconst\n\nconst _ = %s\nconst _ = %s // ERROR excessively long constant"
 	src := fmt.Sprintf(format, strings.Repeat("1", 9999), strings.Repeat("1", 10001))
-	checkFiles(t, nil, "", []string{"longconst.go"}, [][]byte{[]byte(src)}, false)
+	checkFiles(t, nil, "", []string{"longconst.go"}, [][]byte{[]byte(src)}, false, nil)
 }
 
 // TestIndexRepresentability tests that constant index operands must
@@ -327,7 +333,22 @@ func TestLongConstants(t *testing.T) {
 // represent larger values.
 func TestIndexRepresentability(t *testing.T) {
 	const src = "package index\n\nvar s []byte\nvar _ = s[int64 /* ERROR \"int64\\(1\\) << 40 \\(.*\\) overflows int\" */ (1) << 40]"
-	checkFiles(t, &StdSizes{4, 4}, "", []string{"index.go"}, [][]byte{[]byte(src)}, false)
+	checkFiles(t, &StdSizes{4, 4}, "", []string{"index.go"}, [][]byte{[]byte(src)}, false, nil)
+}
+
+func TestIssue46453(t *testing.T) {
+	if typeparams.Enabled {
+		t.Skip("type params are enabled")
+	}
+	const src = "package p\ntype _ comparable // ERROR \"undeclared name: comparable\""
+	checkFiles(t, nil, "", []string{"issue46453.go"}, [][]byte{[]byte(src)}, false, nil)
+}
+
+func TestIssue47243_TypedRHS(t *testing.T) {
+	// The RHS of the shift expression below overflows uint on 32bit platforms,
+	// but this is OK as it is explicitly typed.
+	const src = "package issue47243\n\nvar a uint64; var _ = a << uint64(4294967296)" // uint64(1<<32)
+	checkFiles(t, &StdSizes{4, 4}, "", []string{"p.go"}, [][]byte{[]byte(src)}, false, nil)
 }
 
 func TestCheck(t *testing.T)     { DefPredeclaredTestFuncs(); testDir(t, "check") }
@@ -377,5 +398,5 @@ func testPkg(t *testing.T, filenames []string, goVersion string, manual bool) {
 		}
 		srcs[i] = src
 	}
-	checkFiles(t, nil, goVersion, filenames, srcs, manual)
+	checkFiles(t, nil, goVersion, filenames, srcs, manual, nil)
 }
diff --git a/src/go/types/decl.go b/src/go/types/decl.go
index 5f38a346ce..9211febc6d 100644
--- a/src/go/types/decl.go
+++ b/src/go/types/decl.go
@@ -577,15 +577,37 @@ func (check *Checker) varDecl(obj *Var, lhs []*Var, typ, init ast.Expr) {
 // n0.check != nil, the cycle is reported.
 func (n0 *Named) under() Type {
 	u := n0.underlying
-	if u == nil {
-		return Typ[Invalid]
+
+	if u == Typ[Invalid] {
+		return u
 	}
 
 	// If the underlying type of a defined type is not a defined
-	// type, then that is the desired underlying type.
+	// (incl. instance) type, then that is the desired underlying
+	// type.
+	switch u.(type) {
+	case nil:
+		return Typ[Invalid]
+	default:
+		// common case
+		return u
+	case *Named, *instance:
+		// handled below
+	}
+
+	if n0.check == nil {
+		panic("internal error: Named.check == nil but type is incomplete")
+	}
+
+	// Invariant: after this point n0 as well as any named types in its
+	// underlying chain should be set up when this function exits.
+	check := n0.check
+
+	// If we can't expand u at this point, it is invalid.
 	n := asNamed(u)
 	if n == nil {
-		return u // common case
+		n0.underlying = Typ[Invalid]
+		return n0.underlying
 	}
 
 	// Otherwise, follow the forward chain.
@@ -597,7 +619,16 @@ func (n0 *Named) under() Type {
 			u = Typ[Invalid]
 			break
 		}
-		n1 := asNamed(u)
+		var n1 *Named
+		switch u1 := u.(type) {
+		case *Named:
+			n1 = u1
+		case *instance:
+			n1, _ = u1.expand().(*Named)
+			if n1 == nil {
+				u = Typ[Invalid]
+			}
+		}
 		if n1 == nil {
 			break // end of chain
 		}
@@ -608,11 +639,7 @@ func (n0 *Named) under() Type {
 
 		if i, ok := seen[n]; ok {
 			// cycle
-			// TODO(rFindley) revert this to a method on Checker. Having a possibly
-			// nil Checker on Named and TypeParam is too subtle.
-			if n0.check != nil {
-				n0.check.cycleError(path[i:])
-			}
+			check.cycleError(path[i:])
 			u = Typ[Invalid]
 			break
 		}
@@ -622,8 +649,8 @@ func (n0 *Named) under() Type {
 		// We should never have to update the underlying type of an imported type;
 		// those underlying types should have been resolved during the import.
 		// Also, doing so would lead to a race condition (was issue #31749).
-		// Do this check always, not just in debug more (it's cheap).
-		if n0.check != nil && n.obj.pkg != n0.check.pkg {
+		// Do this check always, not just in debug mode (it's cheap).
+		if n.obj.pkg != check.pkg {
 			panic("internal error: imported type with unresolved underlying type")
 		}
 		n.underlying = u
@@ -665,7 +692,7 @@ func (check *Checker) typeDecl(obj *TypeName, tdecl *ast.TypeSpec, def *Named) {
 	} else {
 		// defined type declaration
 
-		named := &Named{check: check, obj: obj}
+		named := check.newNamed(obj, nil, nil)
 		def.setUnderlying(named)
 		obj.typ = named // make sure recursive type declarations terminate
 
diff --git a/src/go/types/errors.go b/src/go/types/errors.go
index 19e9ae8d44..2263106417 100644
--- a/src/go/types/errors.go
+++ b/src/go/types/errors.go
@@ -31,7 +31,7 @@ func (check *Checker) qualifier(pkg *Package) string {
 		if check.pkgPathMap == nil {
 			check.pkgPathMap = make(map[string]map[string]bool)
 			check.seenPkgMap = make(map[*Package]bool)
-			check.markImports(pkg)
+			check.markImports(check.pkg)
 		}
 		// If the same package name was used by multiple packages, display the full path.
 		if len(check.pkgPathMap[pkg.name]) > 1 {
diff --git a/src/go/types/expr.go b/src/go/types/expr.go
index 5c65fad447..58962e777b 100644
--- a/src/go/types/expr.go
+++ b/src/go/types/expr.go
@@ -778,32 +778,48 @@ func (check *Checker) shift(x, y *operand, e ast.Expr, op token.Token) {
 	// spec: "The right operand in a shift expression must have integer type
 	// or be an untyped constant representable by a value of type uint."
 
-	// Provide a good error message for negative shift counts.
+	// Check that constants are representable by uint, but do not convert them
+	// (see also issue #47243).
 	if y.mode == constant_ {
+		// Provide a good error message for negative shift counts.
 		yval := constant.ToInt(y.val) // consider -1, 1.0, but not -1.1
 		if yval.Kind() == constant.Int && constant.Sign(yval) < 0 {
 			check.invalidOp(y, _InvalidShiftCount, "negative shift count %s", y)
 			x.mode = invalid
 			return
 		}
+
+		if isUntyped(y.typ) {
+			// Caution: Check for representability here, rather than in the switch
+			// below, because isInteger includes untyped integers (was bug #43697).
+			check.representable(y, Typ[Uint])
+			if y.mode == invalid {
+				x.mode = invalid
+				return
+			}
+		}
 	}
 
-	// Caution: Check for isUntyped first because isInteger includes untyped
-	//          integers (was bug #43697).
-	if isUntyped(y.typ) {
+	// Check that RHS is otherwise at least of integer type.
+	switch {
+	case isInteger(y.typ):
+		if !isUnsigned(y.typ) && !check.allowVersion(check.pkg, 1, 13) {
+			check.invalidOp(y, _InvalidShiftCount, "signed shift count %s requires go1.13 or later", y)
+			x.mode = invalid
+			return
+		}
+	case isUntyped(y.typ):
+		// This is incorrect, but preserves pre-existing behavior.
+		// See also bug #47410.
 		check.convertUntyped(y, Typ[Uint])
 		if y.mode == invalid {
 			x.mode = invalid
 			return
 		}
-	} else if !isInteger(y.typ) {
+	default:
 		check.invalidOp(y, _InvalidShiftCount, "shift count %s must be integer", y)
 		x.mode = invalid
 		return
-	} else if !isUnsigned(y.typ) && !check.allowVersion(check.pkg, 1, 13) {
-		check.invalidOp(y, _InvalidShiftCount, "signed shift count %s requires go1.13 or later", y)
-		x.mode = invalid
-		return
 	}
 
 	if x.mode == constant_ {
diff --git a/src/go/types/issues_test.go b/src/go/types/issues_test.go
index 44926919ef..519e199536 100644
--- a/src/go/types/issues_test.go
+++ b/src/go/types/issues_test.go
@@ -577,42 +577,64 @@ func TestIssue44515(t *testing.T) {
 }
 
 func TestIssue43124(t *testing.T) {
-	// TODO(rFindley) enhance the testdata tests to be able to express this type
-	//                of setup.
+	// TODO(rFindley) move this to testdata by enhancing support for importing.
 
 	// All involved packages have the same name (template). Error messages should
 	// disambiguate between text/template and html/template by printing the full
 	// path.
 	const (
 		asrc = `package a; import "text/template"; func F(template.Template) {}; func G(int) {}`
-		bsrc = `package b; import ("a"; "html/template"); func _() { a.F(template.Template{}) }`
-		csrc = `package c; import ("a"; "html/template"); func _() { a.G(template.Template{}) }`
+		bsrc = `
+package b
+
+import (
+	"a"
+	"html/template"
+)
+
+func _() {
+	// Packages should be fully qualified when there is ambiguity within the
+	// error string itself.
+	a.F(template /* ERROR cannot use.*html/template.* as .*text/template */ .Template{})
+}
+`
+		csrc = `
+package c
+
+import (
+	"a"
+	"fmt"
+	"html/template"
+)
+
+// Issue #46905: make sure template is not the first package qualified.
+var _ fmt.Stringer = 1 // ERROR cannot use 1.*as fmt\.Stringer
+
+// Packages should be fully qualified when there is ambiguity in reachable
+// packages. In this case both a (and for that matter html/template) import
+// text/template.
+func _() { a.G(template /* ERROR cannot use .*html/template.*Template */ .Template{}) }
+`
+
+		tsrc = `
+package template
+
+import "text/template"
+
+type T int
+
+// Verify that the current package name also causes disambiguation.
+var _ T = template /* ERROR cannot use.*text/template.* as T value */.Template{}
+`
 	)
 
 	a, err := pkgFor("a", asrc, nil)
 	if err != nil {
 		t.Fatalf("package a failed to typecheck: %v", err)
 	}
-	conf := Config{Importer: importHelper{pkg: a, fallback: importer.Default()}}
+	imp := importHelper{pkg: a, fallback: importer.Default()}
 
-	// Packages should be fully qualified when there is ambiguity within the
-	// error string itself.
-	bast := mustParse(t, bsrc)
-	_, err = conf.Check(bast.Name.Name, fset, []*ast.File{bast}, nil)
-	if err == nil {
-		t.Fatal("package b had no errors")
-	}
-	if !strings.Contains(err.Error(), "text/template") || !strings.Contains(err.Error(), "html/template") {
-		t.Errorf("type checking error for b does not disambiguate package template: %q", err)
-	}
-
-	// ...and also when there is any ambiguity in reachable packages.
-	cast := mustParse(t, csrc)
-	_, err = conf.Check(cast.Name.Name, fset, []*ast.File{cast}, nil)
-	if err == nil {
-		t.Fatal("package c had no errors")
-	}
-	if !strings.Contains(err.Error(), "html/template") {
-		t.Errorf("type checking error for c does not disambiguate package template: %q", err)
-	}
+	checkFiles(t, nil, "", []string{"b.go"}, [][]byte{[]byte(bsrc)}, false, imp)
+	checkFiles(t, nil, "", []string{"c.go"}, [][]byte{[]byte(csrc)}, false, imp)
+	checkFiles(t, nil, "", []string{"t.go"}, [][]byte{[]byte(tsrc)}, false, imp)
 }
diff --git a/src/go/types/resolver.go b/src/go/types/resolver.go
index f67fc65cd1..114647a2ff 100644
--- a/src/go/types/resolver.go
+++ b/src/go/types/resolver.go
@@ -383,7 +383,7 @@ func (check *Checker) collectObjects() {
 				info := &declInfo{file: fileScope, fdecl: d.decl}
 				name := d.decl.Name.Name
 				obj := NewFunc(d.decl.Name.Pos(), pkg, name, nil)
-				if !d.decl.IsMethod() {
+				if d.decl.Recv.NumFields() == 0 {
 					// regular function
 					if d.decl.Recv != nil {
 						check.error(d.decl.Recv, _BadRecv, "method is missing receiver")
diff --git a/src/go/types/sanitize.go b/src/go/types/sanitize.go
index 5970ab38c7..727ec173ea 100644
--- a/src/go/types/sanitize.go
+++ b/src/go/types/sanitize.go
@@ -135,6 +135,9 @@ func (s sanitizer) typ(typ Type) Type {
 		}
 
 	case *Named:
+		if debug && t.check != nil {
+			panic("internal error: Named.check != nil")
+		}
 		if orig := s.typ(t.orig); orig != t.orig {
 			t.orig = orig
 		}
diff --git a/src/go/types/stdlib_test.go b/src/go/types/stdlib_test.go
index 3dea8dcf1e..d86a77a110 100644
--- a/src/go/types/stdlib_test.go
+++ b/src/go/types/stdlib_test.go
@@ -26,9 +26,15 @@ import (
 	. "go/types"
 )
 
+// The cmd/*/internal packages may have been deleted as part of a binary
+// release. Import from source instead.
+//
+// (See https://golang.org/issue/43232 and
+// https://github.com/golang/build/blob/df58bbac082bc87c4a3cdfe336d1ffe60bbaa916/cmd/release/release.go#L533-L545.)
+//
 // Use the same importer for all std lib tests to
 // avoid repeated importing of the same packages.
-var stdLibImporter = importer.Default()
+var stdLibImporter = importer.ForCompiler(token.NewFileSet(), "source", nil)
 
 func TestStdlib(t *testing.T) {
 	testenv.MustHaveGoBuild(t)
@@ -134,7 +140,8 @@ func testTestDir(t *testing.T, path string, ignore ...string) {
 		// parse and type-check file
 		file, err := parser.ParseFile(fset, filename, nil, 0)
 		if err == nil {
-			conf := Config{GoVersion: goVersion, Importer: stdLibImporter}
+			conf := Config{Importer: stdLibImporter}
+			SetGoVersion(&conf, goVersion)
 			_, err = conf.Check(filename, fset, []*ast.File{file}, nil)
 		}
 
diff --git a/src/go/types/testdata/check/issues.src b/src/go/types/testdata/check/issues.src
index e2ac06759b..55fe220337 100644
--- a/src/go/types/testdata/check/issues.src
+++ b/src/go/types/testdata/check/issues.src
@@ -6,7 +6,7 @@ package issues
 
 import (
 	"fmt"
-	syn "cmd/compile/internal/syntax"
+	syn "regexp/syntax"
 	t1 "text/template"
 	t2 "html/template"
 )
@@ -329,10 +329,10 @@ func (... /* ERROR can only use ... with final parameter */ TT) f()
 func issue28281g() (... /* ERROR can only use ... with final parameter */ TT)
 
 // Issue #26234: Make various field/method lookup errors easier to read by matching cmd/compile's output
-func issue26234a(f *syn.File) {
+func issue26234a(f *syn.Prog) {
 	// The error message below should refer to the actual package name (syntax)
 	// not the local package name (syn).
-	f.foo /* ERROR f.foo undefined \(type \*syntax.File has no field or method foo\) */
+	f.foo /* ERROR f\.foo undefined \(type \*syntax\.Prog has no field or method foo\) */
 }
 
 type T struct {
@@ -357,11 +357,11 @@ func issue35895() {
 	var _ T = 0 // ERROR cannot use 0 \(untyped int constant\) as T
 
 	// There is only one package with name syntax imported, only use the (global) package name in error messages.
-	var _ *syn.File = 0 // ERROR cannot use 0 \(untyped int constant\) as \*syntax.File
+	var _ *syn.Prog = 0 // ERROR cannot use 0 \(untyped int constant\) as \*syntax.Prog
 
 	// Because both t1 and t2 have the same global package name (template),
 	// qualify packages with full path name in this case.
-	var _ t1.Template = t2 /* ERROR cannot use .* \(value of type "html/template".Template\) as "text/template".Template */ .Template{}
+	var _ t1.Template = t2 /* ERROR cannot use .* \(value of type .html/template.\.Template\) as .text/template.\.Template */ .Template{}
 }
 
 func issue42989(s uint) {
diff --git a/src/go/types/testdata/examples/functions.go2 b/src/go/types/testdata/examples/functions.go2
index fb74ae7ae2..a053471202 100644
--- a/src/go/types/testdata/examples/functions.go2
+++ b/src/go/types/testdata/examples/functions.go2
@@ -210,5 +210,5 @@ func _() {
 func h[] /* ERROR empty type parameter list */ ()
 
 func _() {
-	h[] /* ERROR operand */ ()
+	h /* ERROR cannot index */ [] /* ERROR operand */ ()
 }
diff --git a/src/go/types/testdata/fixedbugs/issue46403.src b/src/go/types/testdata/fixedbugs/issue46403.src
new file mode 100644
index 0000000000..9d475222ad
--- /dev/null
+++ b/src/go/types/testdata/fixedbugs/issue46403.src
@@ -0,0 +1,11 @@
+// Copyright 2021 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package issue46403
+
+func _() {
+	// a should be used, despite the parser error below.
+	var a []int
+	var _ = a[] // ERROR expected operand
+}
diff --git a/src/go/types/testdata/fixedbugs/issue46404.go1 b/src/go/types/testdata/fixedbugs/issue46404.go1
new file mode 100644
index 0000000000..db604bc1ac
--- /dev/null
+++ b/src/go/types/testdata/fixedbugs/issue46404.go1
@@ -0,0 +1,8 @@
+// Copyright 2021 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package issue46404
+
+// Check that we don't type check t[_] as an instantiation.
+type t [t /* ERROR not a type */ [_]]_ // ERROR cannot use
diff --git a/src/go/types/type.go b/src/go/types/type.go
index 3303cfc077..2660ce4408 100644
--- a/src/go/types/type.go
+++ b/src/go/types/type.go
@@ -644,7 +644,7 @@ func (c *Chan) Elem() Type { return c.elem }
 
 // A Named represents a named (defined) type.
 type Named struct {
-	check      *Checker    // for Named.under implementation
+	check      *Checker    // for Named.under implementation; nilled once under has been called
 	info       typeInfo    // for cycle detection
 	obj        *TypeName   // corresponding declared object
 	orig       Type        // type (on RHS of declaration) this *Named type is derived of (for cycle reporting)
@@ -661,11 +661,7 @@ func NewNamed(obj *TypeName, underlying Type, methods []*Func) *Named {
 	if _, ok := underlying.(*Named); ok {
 		panic("types.NewNamed: underlying type must not be *Named")
 	}
-	typ := &Named{obj: obj, orig: underlying, underlying: underlying, methods: methods}
-	if obj.typ == nil {
-		obj.typ = typ
-	}
-	return typ
+	return (*Checker)(nil).newNamed(obj, underlying, methods)
 }
 
 func (check *Checker) newNamed(obj *TypeName, underlying Type, methods []*Func) *Named {
@@ -673,6 +669,23 @@ func (check *Checker) newNamed(obj *TypeName, underlying Type, methods []*Func)
 	if obj.typ == nil {
 		obj.typ = typ
 	}
+	// Ensure that typ is always expanded, at which point the check field can be
+	// nilled out.
+	//
+	// Note that currently we cannot nil out check inside typ.under(), because
+	// it's possible that typ is expanded multiple times.
+	//
+	// TODO(rFindley): clean this up so that under is the only function mutating
+	//                 named types.
+	if check != nil {
+		check.later(func() {
+			switch typ.under().(type) {
+			case *Named, *instance:
+				panic("internal error: unexpanded underlying type")
+			}
+			typ.check = nil
+		})
+	}
 	return typ
 }
 
diff --git a/src/go/types/types_test.go b/src/go/types/types_test.go
index fd9462c4a2..25cd996628 100644
--- a/src/go/types/types_test.go
+++ b/src/go/types/types_test.go
@@ -11,3 +11,9 @@ import "sync/atomic"
 // for tests where we may want to have a consistent
 // numbering for each individual test case.
 func ResetId() { atomic.StoreUint32(&lastId, 0) }
+
+// SetGoVersion sets the unexported goVersion field on config, so that tests
+// which assert on behavior for older Go versions can set it.
+func SetGoVersion(config *Config, goVersion string) {
+	config.goVersion = goVersion
+}
diff --git a/src/go/types/typexpr.go b/src/go/types/typexpr.go
index 5185c33fcb..1738d864a6 100644
--- a/src/go/types/typexpr.go
+++ b/src/go/types/typexpr.go
@@ -463,8 +463,12 @@ func (check *Checker) typInternal(e0 ast.Expr, def *Named) (T Type) {
 		}
 
 	case *ast.IndexExpr:
-		exprs := typeparams.UnpackExpr(e.Index)
-		return check.instantiatedType(e.X, exprs, def)
+		if typeparams.Enabled {
+			exprs := typeparams.UnpackExpr(e.Index)
+			return check.instantiatedType(e.X, exprs, def)
+		}
+		check.errorf(e0, _NotAType, "%s is not a type", e0)
+		check.use(e.X)
 
 	case *ast.ParenExpr:
 		// Generic types must be instantiated before they can be used in any form.
diff --git a/src/go/types/universe.go b/src/go/types/universe.go
index 7c211fa6f7..d7feb2c609 100644
--- a/src/go/types/universe.go
+++ b/src/go/types/universe.go
@@ -8,6 +8,7 @@ package types
 
 import (
 	"go/constant"
+	"go/internal/typeparams"
 	"go/token"
 	"strings"
 )
@@ -237,7 +238,9 @@ func init() {
 	defPredeclaredConsts()
 	defPredeclaredNil()
 	defPredeclaredFuncs()
-	defPredeclaredComparable()
+	if typeparams.Enabled {
+		defPredeclaredComparable()
+	}
 
 	universeIota = Universe.Lookup("iota").(*Const)
 	universeByte = Universe.Lookup("byte").(*TypeName).typ.(*Basic)
diff --git a/src/image/draw/draw.go b/src/image/draw/draw.go
index 8f96aa2d18..13f6668293 100644
--- a/src/image/draw/draw.go
+++ b/src/image/draw/draw.go
@@ -23,6 +23,16 @@ type Image interface {
 	Set(x, y int, c color.Color)
 }
 
+// RGBA64Image extends both the Image and image.RGBA64Image interfaces with a
+// SetRGBA64 method to change a single pixel. SetRGBA64 is equivalent to
+// calling Set, but it can avoid allocations from converting concrete color
+// types to the color.Color interface type.
+type RGBA64Image interface {
+	image.RGBA64Image
+	Set(x, y int, c color.Color)
+	SetRGBA64(x, y int, c color.RGBA64)
+}
+
 // Quantizer produces a palette for an image.
 type Quantizer interface {
 	// Quantize appends up to cap(p) - len(p) colors to p and returns the
diff --git a/src/image/geom.go b/src/image/geom.go
index 78e9e49d4f..e71aa61187 100644
--- a/src/image/geom.go
+++ b/src/image/geom.go
@@ -246,6 +246,14 @@ func (r Rectangle) At(x, y int) color.Color {
 	return color.Transparent
 }
 
+// RGBA64At implements the RGBA64Image interface.
+func (r Rectangle) RGBA64At(x, y int) color.RGBA64 {
+	if (Point{x, y}).In(r) {
+		return color.RGBA64{0xffff, 0xffff, 0xffff, 0xffff}
+	}
+	return color.RGBA64{}
+}
+
 // Bounds implements the Image interface.
 func (r Rectangle) Bounds() Rectangle {
 	return r
diff --git a/src/image/gif/reader.go b/src/image/gif/reader.go
index e580ab049e..9e8268c86f 100644
--- a/src/image/gif/reader.go
+++ b/src/image/gif/reader.go
@@ -116,7 +116,7 @@ type decoder struct {
 // consumed when checking that the blockReader is exhausted.
 //
 // To avoid the allocation of a bufio.Reader for the lzw Reader, blockReader
-// implements io.ReadByte and buffers blocks into the decoder's "tmp" buffer.
+// implements io.ByteReader and buffers blocks into the decoder's "tmp" buffer.
 type blockReader struct {
 	d    *decoder
 	i, j uint8 // d.tmp[i:j] contains the buffered bytes
diff --git a/src/image/image.go b/src/image/image.go
index 8adba96ab6..930d9ac6c7 100644
--- a/src/image/image.go
+++ b/src/image/image.go
@@ -45,6 +45,17 @@ type Image interface {
 	At(x, y int) color.Color
 }
 
+// RGBA64Image is an Image whose pixels can be converted directly to a
+// color.RGBA64.
+type RGBA64Image interface {
+	// RGBA64At returns the RGBA64 color of the pixel at (x, y). It is
+	// equivalent to calling At(x, y).RGBA() and converting the resulting
+	// 32-bit return values to a color.RGBA64, but it can avoid allocations
+	// from converting concrete color types to the color.Color interface type.
+	RGBA64At(x, y int) color.RGBA64
+	Image
+}
+
 // PalettedImage is an image whose colors may come from a limited palette.
 // If m is a PalettedImage and m.ColorModel() returns a color.Palette p,
 // then m.At(x, y) should be equivalent to p[m.ColorIndexAt(x, y)]. If m's
@@ -90,6 +101,24 @@ func (p *RGBA) At(x, y int) color.Color {
 	return p.RGBAAt(x, y)
 }
 
+func (p *RGBA) RGBA64At(x, y int) color.RGBA64 {
+	if !(Point{x, y}.In(p.Rect)) {
+		return color.RGBA64{}
+	}
+	i := p.PixOffset(x, y)
+	s := p.Pix[i : i+4 : i+4] // Small cap improves performance, see https://golang.org/issue/27857
+	r := uint16(s[0])
+	g := uint16(s[1])
+	b := uint16(s[2])
+	a := uint16(s[3])
+	return color.RGBA64{
+		(r << 8) | r,
+		(g << 8) | g,
+		(b << 8) | b,
+		(a << 8) | a,
+	}
+}
+
 func (p *RGBA) RGBAAt(x, y int) color.RGBA {
 	if !(Point{x, y}.In(p.Rect)) {
 		return color.RGBA{}
@@ -118,6 +147,18 @@ func (p *RGBA) Set(x, y int, c color.Color) {
 	s[3] = c1.A
 }
 
+func (p *RGBA) SetRGBA64(x, y int, c color.RGBA64) {
+	if !(Point{x, y}.In(p.Rect)) {
+		return
+	}
+	i := p.PixOffset(x, y)
+	s := p.Pix[i : i+4 : i+4] // Small cap improves performance, see https://golang.org/issue/27857
+	s[0] = uint8(c.R >> 8)
+	s[1] = uint8(c.G >> 8)
+	s[2] = uint8(c.B >> 8)
+	s[3] = uint8(c.A >> 8)
+}
+
 func (p *RGBA) SetRGBA(x, y int, c color.RGBA) {
 	if !(Point{x, y}.In(p.Rect)) {
 		return
@@ -311,6 +352,11 @@ func (p *NRGBA) At(x, y int) color.Color {
 	return p.NRGBAAt(x, y)
 }
 
+func (p *NRGBA) RGBA64At(x, y int) color.RGBA64 {
+	r, g, b, a := p.NRGBAAt(x, y).RGBA()
+	return color.RGBA64{uint16(r), uint16(g), uint16(b), uint16(a)}
+}
+
 func (p *NRGBA) NRGBAAt(x, y int) color.NRGBA {
 	if !(Point{x, y}.In(p.Rect)) {
 		return color.NRGBA{}
@@ -339,6 +385,24 @@ func (p *NRGBA) Set(x, y int, c color.Color) {
 	s[3] = c1.A
 }
 
+func (p *NRGBA) SetRGBA64(x, y int, c color.RGBA64) {
+	if !(Point{x, y}.In(p.Rect)) {
+		return
+	}
+	r, g, b, a := uint32(c.R), uint32(c.G), uint32(c.B), uint32(c.A)
+	if (a != 0) && (a != 0xffff) {
+		r = (r * 0xffff) / a
+		g = (g * 0xffff) / a
+		b = (b * 0xffff) / a
+	}
+	i := p.PixOffset(x, y)
+	s := p.Pix[i : i+4 : i+4] // Small cap improves performance, see https://golang.org/issue/27857
+	s[0] = uint8(r >> 8)
+	s[1] = uint8(g >> 8)
+	s[2] = uint8(b >> 8)
+	s[3] = uint8(a >> 8)
+}
+
 func (p *NRGBA) SetNRGBA(x, y int, c color.NRGBA) {
 	if !(Point{x, y}.In(p.Rect)) {
 		return
@@ -415,6 +479,11 @@ func (p *NRGBA64) At(x, y int) color.Color {
 	return p.NRGBA64At(x, y)
 }
 
+func (p *NRGBA64) RGBA64At(x, y int) color.RGBA64 {
+	r, g, b, a := p.NRGBA64At(x, y).RGBA()
+	return color.RGBA64{uint16(r), uint16(g), uint16(b), uint16(a)}
+}
+
 func (p *NRGBA64) NRGBA64At(x, y int) color.NRGBA64 {
 	if !(Point{x, y}.In(p.Rect)) {
 		return color.NRGBA64{}
@@ -452,6 +521,28 @@ func (p *NRGBA64) Set(x, y int, c color.Color) {
 	s[7] = uint8(c1.A)
 }
 
+func (p *NRGBA64) SetRGBA64(x, y int, c color.RGBA64) {
+	if !(Point{x, y}.In(p.Rect)) {
+		return
+	}
+	r, g, b, a := uint32(c.R), uint32(c.G), uint32(c.B), uint32(c.A)
+	if (a != 0) && (a != 0xffff) {
+		r = (r * 0xffff) / a
+		g = (g * 0xffff) / a
+		b = (b * 0xffff) / a
+	}
+	i := p.PixOffset(x, y)
+	s := p.Pix[i : i+8 : i+8] // Small cap improves performance, see https://golang.org/issue/27857
+	s[0] = uint8(r >> 8)
+	s[1] = uint8(r)
+	s[2] = uint8(g >> 8)
+	s[3] = uint8(g)
+	s[4] = uint8(b >> 8)
+	s[5] = uint8(b)
+	s[6] = uint8(a >> 8)
+	s[7] = uint8(a)
+}
+
 func (p *NRGBA64) SetNRGBA64(x, y int, c color.NRGBA64) {
 	if !(Point{x, y}.In(p.Rect)) {
 		return
@@ -532,6 +623,12 @@ func (p *Alpha) At(x, y int) color.Color {
 	return p.AlphaAt(x, y)
 }
 
+func (p *Alpha) RGBA64At(x, y int) color.RGBA64 {
+	a := uint16(p.AlphaAt(x, y).A)
+	a |= a << 8
+	return color.RGBA64{a, a, a, a}
+}
+
 func (p *Alpha) AlphaAt(x, y int) color.Alpha {
 	if !(Point{x, y}.In(p.Rect)) {
 		return color.Alpha{}
@@ -554,6 +651,14 @@ func (p *Alpha) Set(x, y int, c color.Color) {
 	p.Pix[i] = color.AlphaModel.Convert(c).(color.Alpha).A
 }
 
+func (p *Alpha) SetRGBA64(x, y int, c color.RGBA64) {
+	if !(Point{x, y}.In(p.Rect)) {
+		return
+	}
+	i := p.PixOffset(x, y)
+	p.Pix[i] = uint8(c.A >> 8)
+}
+
 func (p *Alpha) SetAlpha(x, y int, c color.Alpha) {
 	if !(Point{x, y}.In(p.Rect)) {
 		return
@@ -626,6 +731,11 @@ func (p *Alpha16) At(x, y int) color.Color {
 	return p.Alpha16At(x, y)
 }
 
+func (p *Alpha16) RGBA64At(x, y int) color.RGBA64 {
+	a := p.Alpha16At(x, y).A
+	return color.RGBA64{a, a, a, a}
+}
+
 func (p *Alpha16) Alpha16At(x, y int) color.Alpha16 {
 	if !(Point{x, y}.In(p.Rect)) {
 		return color.Alpha16{}
@@ -650,6 +760,15 @@ func (p *Alpha16) Set(x, y int, c color.Color) {
 	p.Pix[i+1] = uint8(c1.A)
 }
 
+func (p *Alpha16) SetRGBA64(x, y int, c color.RGBA64) {
+	if !(Point{x, y}.In(p.Rect)) {
+		return
+	}
+	i := p.PixOffset(x, y)
+	p.Pix[i+0] = uint8(c.A >> 8)
+	p.Pix[i+1] = uint8(c.A)
+}
+
 func (p *Alpha16) SetAlpha16(x, y int, c color.Alpha16) {
 	if !(Point{x, y}.In(p.Rect)) {
 		return
@@ -723,6 +842,12 @@ func (p *Gray) At(x, y int) color.Color {
 	return p.GrayAt(x, y)
 }
 
+func (p *Gray) RGBA64At(x, y int) color.RGBA64 {
+	gray := uint16(p.GrayAt(x, y).Y)
+	gray |= gray << 8
+	return color.RGBA64{gray, gray, gray, 0xffff}
+}
+
 func (p *Gray) GrayAt(x, y int) color.Gray {
 	if !(Point{x, y}.In(p.Rect)) {
 		return color.Gray{}
@@ -745,6 +870,16 @@ func (p *Gray) Set(x, y int, c color.Color) {
 	p.Pix[i] = color.GrayModel.Convert(c).(color.Gray).Y
 }
 
+func (p *Gray) SetRGBA64(x, y int, c color.RGBA64) {
+	if !(Point{x, y}.In(p.Rect)) {
+		return
+	}
+	// This formula is the same as in color.grayModel.
+	gray := (19595*uint32(c.R) + 38470*uint32(c.G) + 7471*uint32(c.B) + 1<<15) >> 24
+	i := p.PixOffset(x, y)
+	p.Pix[i] = uint8(gray)
+}
+
 func (p *Gray) SetGray(x, y int, c color.Gray) {
 	if !(Point{x, y}.In(p.Rect)) {
 		return
@@ -804,6 +939,11 @@ func (p *Gray16) At(x, y int) color.Color {
 	return p.Gray16At(x, y)
 }
 
+func (p *Gray16) RGBA64At(x, y int) color.RGBA64 {
+	gray := p.Gray16At(x, y).Y
+	return color.RGBA64{gray, gray, gray, 0xffff}
+}
+
 func (p *Gray16) Gray16At(x, y int) color.Gray16 {
 	if !(Point{x, y}.In(p.Rect)) {
 		return color.Gray16{}
@@ -828,6 +968,17 @@ func (p *Gray16) Set(x, y int, c color.Color) {
 	p.Pix[i+1] = uint8(c1.Y)
 }
 
+func (p *Gray16) SetRGBA64(x, y int, c color.RGBA64) {
+	if !(Point{x, y}.In(p.Rect)) {
+		return
+	}
+	// This formula is the same as in color.gray16Model.
+	gray := (19595*uint32(c.R) + 38470*uint32(c.G) + 7471*uint32(c.B) + 1<<15) >> 16
+	i := p.PixOffset(x, y)
+	p.Pix[i+0] = uint8(gray >> 8)
+	p.Pix[i+1] = uint8(gray)
+}
+
 func (p *Gray16) SetGray16(x, y int, c color.Gray16) {
 	if !(Point{x, y}.In(p.Rect)) {
 		return
@@ -888,6 +1039,11 @@ func (p *CMYK) At(x, y int) color.Color {
 	return p.CMYKAt(x, y)
 }
 
+func (p *CMYK) RGBA64At(x, y int) color.RGBA64 {
+	r, g, b, a := p.CMYKAt(x, y).RGBA()
+	return color.RGBA64{uint16(r), uint16(g), uint16(b), uint16(a)}
+}
+
 func (p *CMYK) CMYKAt(x, y int) color.CMYK {
 	if !(Point{x, y}.In(p.Rect)) {
 		return color.CMYK{}
@@ -916,6 +1072,19 @@ func (p *CMYK) Set(x, y int, c color.Color) {
 	s[3] = c1.K
 }
 
+func (p *CMYK) SetRGBA64(x, y int, c color.RGBA64) {
+	if !(Point{x, y}.In(p.Rect)) {
+		return
+	}
+	cc, mm, yy, kk := color.RGBToCMYK(uint8(c.R>>8), uint8(c.G>>8), uint8(c.B>>8))
+	i := p.PixOffset(x, y)
+	s := p.Pix[i : i+4 : i+4] // Small cap improves performance, see https://golang.org/issue/27857
+	s[0] = cc
+	s[1] = mm
+	s[2] = yy
+	s[3] = kk
+}
+
 func (p *CMYK) SetCMYK(x, y int, c color.CMYK) {
 	if !(Point{x, y}.In(p.Rect)) {
 		return
@@ -988,6 +1157,26 @@ func (p *Paletted) At(x, y int) color.Color {
 	return p.Palette[p.Pix[i]]
 }
 
+func (p *Paletted) RGBA64At(x, y int) color.RGBA64 {
+	if len(p.Palette) == 0 {
+		return color.RGBA64{}
+	}
+	c := color.Color(nil)
+	if !(Point{x, y}.In(p.Rect)) {
+		c = p.Palette[0]
+	} else {
+		i := p.PixOffset(x, y)
+		c = p.Palette[p.Pix[i]]
+	}
+	r, g, b, a := c.RGBA()
+	return color.RGBA64{
+		uint16(r),
+		uint16(g),
+		uint16(b),
+		uint16(a),
+	}
+}
+
 // PixOffset returns the index of the first element of Pix that corresponds to
 // the pixel at (x, y).
 func (p *Paletted) PixOffset(x, y int) int {
@@ -1002,6 +1191,14 @@ func (p *Paletted) Set(x, y int, c color.Color) {
 	p.Pix[i] = uint8(p.Palette.Index(c))
 }
 
+func (p *Paletted) SetRGBA64(x, y int, c color.RGBA64) {
+	if !(Point{x, y}.In(p.Rect)) {
+		return
+	}
+	i := p.PixOffset(x, y)
+	p.Pix[i] = uint8(p.Palette.Index(c))
+}
+
 func (p *Paletted) ColorIndexAt(x, y int) uint8 {
 	if !(Point{x, y}.In(p.Rect)) {
 		return 0
diff --git a/src/image/image_test.go b/src/image/image_test.go
index b9b9bfaa28..7f41bcb6c7 100644
--- a/src/image/image_test.go
+++ b/src/image/image_test.go
@@ -6,6 +6,7 @@ package image
 
 import (
 	"image/color"
+	"image/color/palette"
 	"testing"
 )
 
@@ -191,6 +192,92 @@ func Test16BitsPerColorChannel(t *testing.T) {
 	}
 }
 
+func TestRGBA64Image(t *testing.T) {
+	// memset sets every element of s to v.
+	memset := func(s []byte, v byte) {
+		for i := range s {
+			s[i] = v
+		}
+	}
+
+	r := Rect(0, 0, 3, 2)
+	testCases := []Image{
+		NewAlpha(r),
+		NewAlpha16(r),
+		NewCMYK(r),
+		NewGray(r),
+		NewGray16(r),
+		NewNRGBA(r),
+		NewNRGBA64(r),
+		NewNYCbCrA(r, YCbCrSubsampleRatio444),
+		NewPaletted(r, palette.Plan9),
+		NewRGBA(r),
+		NewRGBA64(r),
+		NewUniform(color.RGBA64{}),
+		NewYCbCr(r, YCbCrSubsampleRatio444),
+		r,
+	}
+	for _, tc := range testCases {
+		switch tc := tc.(type) {
+		// Most of the concrete image types in the testCases implement the
+		// draw.RGBA64Image interface: they have a SetRGBA64 method. We use an
+		// interface literal here, instead of importing "image/draw", to avoid
+		// an import cycle.
+		//
+		// The YCbCr and NYCbCrA types are special-cased. Chroma subsampling
+		// means that setting one pixel can modify neighboring pixels. They
+		// don't have Set or SetRGBA64 methods because that side effect could
+		// be surprising. Here, we just memset the channel buffers instead.
+		//
+		// The Uniform and Rectangle types are also special-cased, as they
+		// don't have a Set or SetRGBA64 method.
+		case interface {
+			SetRGBA64(x, y int, c color.RGBA64)
+		}:
+			tc.SetRGBA64(1, 1, color.RGBA64{0x7FFF, 0x3FFF, 0x0000, 0x7FFF})
+
+		case *NYCbCrA:
+			memset(tc.YCbCr.Y, 0x77)
+			memset(tc.YCbCr.Cb, 0x88)
+			memset(tc.YCbCr.Cr, 0x99)
+			memset(tc.A, 0xAA)
+
+		case *Uniform:
+			tc.C = color.RGBA64{0x7FFF, 0x3FFF, 0x0000, 0x7FFF}
+
+		case *YCbCr:
+			memset(tc.Y, 0x77)
+			memset(tc.Cb, 0x88)
+			memset(tc.Cr, 0x99)
+
+		case Rectangle:
+			// No-op. Rectangle pixels' colors are immutable. They're always
+			// color.Opaque.
+
+		default:
+			t.Errorf("could not initialize pixels for %T", tc)
+			continue
+		}
+
+		// Check that RGBA64At(x, y) is equivalent to At(x, y).RGBA().
+		rgba64Image, ok := tc.(RGBA64Image)
+		if !ok {
+			t.Errorf("%T is not an RGBA64Image", tc)
+			continue
+		}
+		got := rgba64Image.RGBA64At(1, 1)
+		wantR, wantG, wantB, wantA := tc.At(1, 1).RGBA()
+		if (uint32(got.R) != wantR) || (uint32(got.G) != wantG) ||
+			(uint32(got.B) != wantB) || (uint32(got.A) != wantA) {
+			t.Errorf("%T:\ngot  (0x%04X, 0x%04X, 0x%04X, 0x%04X)\n"+
+				"want (0x%04X, 0x%04X, 0x%04X, 0x%04X)", tc,
+				got.R, got.G, got.B, got.A,
+				wantR, wantG, wantB, wantA)
+			continue
+		}
+	}
+}
+
 func BenchmarkAt(b *testing.B) {
 	for _, tc := range testImages {
 		b.Run(tc.name, func(b *testing.B) {
diff --git a/src/image/names.go b/src/image/names.go
index 8595a35014..17b06588ac 100644
--- a/src/image/names.go
+++ b/src/image/names.go
@@ -41,6 +41,11 @@ func (c *Uniform) Bounds() Rectangle { return Rectangle{Point{-1e9, -1e9}, Point
 
 func (c *Uniform) At(x, y int) color.Color { return c.C }
 
+func (c *Uniform) RGBA64At(x, y int) color.RGBA64 {
+	r, g, b, a := c.C.RGBA()
+	return color.RGBA64{uint16(r), uint16(g), uint16(b), uint16(a)}
+}
+
 // Opaque scans the entire image and reports whether it is fully opaque.
 func (c *Uniform) Opaque() bool {
 	_, _, _, a := c.C.RGBA()
diff --git a/src/image/ycbcr.go b/src/image/ycbcr.go
index fbdffe1bd1..328b90d152 100644
--- a/src/image/ycbcr.go
+++ b/src/image/ycbcr.go
@@ -71,6 +71,11 @@ func (p *YCbCr) At(x, y int) color.Color {
 	return p.YCbCrAt(x, y)
 }
 
+func (p *YCbCr) RGBA64At(x, y int) color.RGBA64 {
+	r, g, b, a := p.YCbCrAt(x, y).RGBA()
+	return color.RGBA64{uint16(r), uint16(g), uint16(b), uint16(a)}
+}
+
 func (p *YCbCr) YCbCrAt(x, y int) color.YCbCr {
 	if !(Point{x, y}.In(p.Rect)) {
 		return color.YCbCr{}
@@ -210,6 +215,11 @@ func (p *NYCbCrA) At(x, y int) color.Color {
 	return p.NYCbCrAAt(x, y)
 }
 
+func (p *NYCbCrA) RGBA64At(x, y int) color.RGBA64 {
+	r, g, b, a := p.NYCbCrAAt(x, y).RGBA()
+	return color.RGBA64{uint16(r), uint16(g), uint16(b), uint16(a)}
+}
+
 func (p *NYCbCrA) NYCbCrAAt(x, y int) color.NYCbCrA {
 	if !(Point{X: x, Y: y}.In(p.Rect)) {
 		return color.NYCbCrA{}
diff --git a/src/internal/buildcfg/exp.go b/src/internal/buildcfg/exp.go
index 2435a79dce..9a60253aab 100644
--- a/src/internal/buildcfg/exp.go
+++ b/src/internal/buildcfg/exp.go
@@ -6,7 +6,6 @@ package buildcfg
 
 import (
 	"fmt"
-	"os"
 	"reflect"
 	"strings"
 
@@ -18,20 +17,19 @@ import (
 //
 // (This is not necessarily the set of experiments the compiler itself
 // was built with.)
-var Experiment goexperiment.Flags = parseExperiments()
-
-var regabiSupported = GOARCH == "amd64" && (GOOS == "android" || GOOS == "linux" || GOOS == "darwin" || GOOS == "windows")
-
+//
 // experimentBaseline specifies the experiment flags that are enabled by
 // default in the current toolchain. This is, in effect, the "control"
 // configuration and any variation from this is an experiment.
-var experimentBaseline = goexperiment.Flags{
-	RegabiWrappers: regabiSupported,
-	RegabiG:        regabiSupported,
-	RegabiReflect:  regabiSupported,
-	RegabiDefer:    regabiSupported,
-	RegabiArgs:     regabiSupported,
-}
+var Experiment, experimentBaseline = func() (goexperiment.Flags, goexperiment.Flags) {
+	flags, baseline, err := ParseGOEXPERIMENT(GOOS, GOARCH, envOr("GOEXPERIMENT", defaultGOEXPERIMENT))
+	if err != nil {
+		Error = err
+	}
+	return flags, baseline
+}()
+
+const DefaultGOEXPERIMENT = defaultGOEXPERIMENT
 
 // FramePointerEnabled enables the use of platform conventions for
 // saving frame pointers.
@@ -42,16 +40,29 @@ var experimentBaseline = goexperiment.Flags{
 // Note: must agree with runtime.framepointer_enabled.
 var FramePointerEnabled = GOARCH == "amd64" || GOARCH == "arm64"
 
-func parseExperiments() goexperiment.Flags {
+// ParseGOEXPERIMENT parses a (GOOS, GOARCH, GOEXPERIMENT)
+// configuration tuple and returns the enabled and baseline experiment
+// flag sets.
+//
+// TODO(mdempsky): Move to internal/goexperiment.
+func ParseGOEXPERIMENT(goos, goarch, goexp string) (flags, baseline goexperiment.Flags, err error) {
+	regabiSupported := goarch == "amd64" && (goos == "android" || goos == "linux" || goos == "darwin" || goos == "windows")
+
+	baseline = goexperiment.Flags{
+		RegabiWrappers: regabiSupported,
+		RegabiG:        regabiSupported,
+		RegabiReflect:  regabiSupported,
+		RegabiDefer:    regabiSupported,
+		RegabiArgs:     regabiSupported,
+	}
+
 	// Start with the statically enabled set of experiments.
-	flags := experimentBaseline
+	flags = baseline
 
 	// Pick up any changes to the baseline configuration from the
 	// GOEXPERIMENT environment. This can be set at make.bash time
 	// and overridden at build time.
-	env := envOr("GOEXPERIMENT", defaultGOEXPERIMENT)
-
-	if env != "" {
+	if goexp != "" {
 		// Create a map of known experiment names.
 		names := make(map[string]func(bool))
 		rv := reflect.ValueOf(&flags).Elem()
@@ -74,7 +85,7 @@ func parseExperiments() goexperiment.Flags {
 		}
 
 		// Parse names.
-		for _, f := range strings.Split(env, ",") {
+		for _, f := range strings.Split(goexp, ",") {
 			if f == "" {
 				continue
 			}
@@ -91,15 +102,15 @@ func parseExperiments() goexperiment.Flags {
 			}
 			set, ok := names[f]
 			if !ok {
-				fmt.Printf("unknown experiment %s\n", f)
-				os.Exit(2)
+				err = fmt.Errorf("unknown GOEXPERIMENT %s", f)
+				return
 			}
 			set(val)
 		}
 	}
 
 	// regabi is only supported on amd64.
-	if GOARCH != "amd64" {
+	if goarch != "amd64" {
 		flags.RegabiWrappers = false
 		flags.RegabiG = false
 		flags.RegabiReflect = false
@@ -108,12 +119,12 @@ func parseExperiments() goexperiment.Flags {
 	}
 	// Check regabi dependencies.
 	if flags.RegabiG && !flags.RegabiWrappers {
-		Error = fmt.Errorf("GOEXPERIMENT regabig requires regabiwrappers")
+		err = fmt.Errorf("GOEXPERIMENT regabig requires regabiwrappers")
 	}
 	if flags.RegabiArgs && !(flags.RegabiWrappers && flags.RegabiG && flags.RegabiReflect && flags.RegabiDefer) {
-		Error = fmt.Errorf("GOEXPERIMENT regabiargs requires regabiwrappers,regabig,regabireflect,regabidefer")
+		err = fmt.Errorf("GOEXPERIMENT regabiargs requires regabiwrappers,regabig,regabireflect,regabidefer")
 	}
-	return flags
+	return
 }
 
 // expList returns the list of lower-cased experiment names for
@@ -165,3 +176,14 @@ func EnabledExperiments() []string {
 func AllExperiments() []string {
 	return expList(&Experiment, nil, true)
 }
+
+// UpdateExperiments updates the Experiment global based on a new GOARCH value.
+// This is only required for cmd/go, which can change GOARCH after
+// program startup due to use of "go env -w".
+func UpdateExperiments(goos, goarch, goexperiment string) {
+	var err error
+	Experiment, experimentBaseline, err = ParseGOEXPERIMENT(goos, goarch, goexperiment)
+	if err != nil {
+		Error = err
+	}
+}
diff --git a/src/internal/bytealg/compare_mips64x.s b/src/internal/bytealg/compare_mips64x.s
index 4f05fceaca..b472e510bc 100644
--- a/src/internal/bytealg/compare_mips64x.s
+++ b/src/internal/bytealg/compare_mips64x.s
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build mips64 || mips64le
 // +build mips64 mips64le
 
 #include "go_asm.h"
diff --git a/src/internal/bytealg/compare_mipsx.s b/src/internal/bytealg/compare_mipsx.s
index 9ac5ba5687..dcc4916e56 100644
--- a/src/internal/bytealg/compare_mipsx.s
+++ b/src/internal/bytealg/compare_mipsx.s
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build mips || mipsle
 // +build mips mipsle
 
 #include "go_asm.h"
diff --git a/src/internal/bytealg/compare_ppc64x.s b/src/internal/bytealg/compare_ppc64x.s
index 7819da31cd..83444fa826 100644
--- a/src/internal/bytealg/compare_ppc64x.s
+++ b/src/internal/bytealg/compare_ppc64x.s
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build ppc64 || ppc64le
 // +build ppc64 ppc64le
 
 #include "go_asm.h"
diff --git a/src/internal/bytealg/count_ppc64x.s b/src/internal/bytealg/count_ppc64x.s
index a64d7d792d..94163cbd8a 100644
--- a/src/internal/bytealg/count_ppc64x.s
+++ b/src/internal/bytealg/count_ppc64x.s
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build ppc64le || ppc64
 // +build ppc64le ppc64
 
 #include "go_asm.h"
diff --git a/src/internal/bytealg/equal_mips64x.s b/src/internal/bytealg/equal_mips64x.s
index 641e3ff06c..c2f7d3997e 100644
--- a/src/internal/bytealg/equal_mips64x.s
+++ b/src/internal/bytealg/equal_mips64x.s
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build mips64 || mips64le
 // +build mips64 mips64le
 
 #include "go_asm.h"
diff --git a/src/internal/bytealg/equal_mipsx.s b/src/internal/bytealg/equal_mipsx.s
index 1cabc70178..11e5549e45 100644
--- a/src/internal/bytealg/equal_mipsx.s
+++ b/src/internal/bytealg/equal_mipsx.s
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build mips || mipsle
 // +build mips mipsle
 
 #include "go_asm.h"
diff --git a/src/internal/bytealg/equal_ppc64x.s b/src/internal/bytealg/equal_ppc64x.s
index 18171eaedc..5f0fea521b 100644
--- a/src/internal/bytealg/equal_ppc64x.s
+++ b/src/internal/bytealg/equal_ppc64x.s
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build ppc64 || ppc64le
 // +build ppc64 ppc64le
 
 #include "go_asm.h"
diff --git a/src/internal/bytealg/index_generic.go b/src/internal/bytealg/index_generic.go
index 287bdba4c6..0a6eb90d2d 100644
--- a/src/internal/bytealg/index_generic.go
+++ b/src/internal/bytealg/index_generic.go
@@ -2,7 +2,6 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// go:build !amd64 && !arm64 && !s390x && !ppc64le && !ppc64
 //go:build !amd64 && !arm64 && !s390x && !ppc64le && !ppc64
 // +build !amd64,!arm64,!s390x,!ppc64le,!ppc64
 
diff --git a/src/internal/bytealg/index_native.go b/src/internal/bytealg/index_native.go
index 75aff4b3cb..9547a5d8e2 100644
--- a/src/internal/bytealg/index_native.go
+++ b/src/internal/bytealg/index_native.go
@@ -2,7 +2,6 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// go:build amd64 || arm64 || s390x || ppc64le || ppc64
 //go:build amd64 || arm64 || s390x || ppc64le || ppc64
 // +build amd64 arm64 s390x ppc64le ppc64
 
diff --git a/src/internal/bytealg/index_ppc64x.s b/src/internal/bytealg/index_ppc64x.s
index b7a1e2d7a2..3ed9442125 100644
--- a/src/internal/bytealg/index_ppc64x.s
+++ b/src/internal/bytealg/index_ppc64x.s
@@ -21,6 +21,7 @@
 // work is still needed for a big endian
 // implementation on power9.
 
+//go:build ppc64 || ppc64le
 // +build ppc64 ppc64le
 
 #include "go_asm.h"
diff --git a/src/internal/bytealg/indexbyte_mips64x.s b/src/internal/bytealg/indexbyte_mips64x.s
index 6ebf0dee24..0f377f5a4c 100644
--- a/src/internal/bytealg/indexbyte_mips64x.s
+++ b/src/internal/bytealg/indexbyte_mips64x.s
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build mips64 || mips64le
 // +build mips64 mips64le
 
 #include "go_asm.h"
diff --git a/src/internal/bytealg/indexbyte_mipsx.s b/src/internal/bytealg/indexbyte_mipsx.s
index e44440b5f9..bed015bbd6 100644
--- a/src/internal/bytealg/indexbyte_mipsx.s
+++ b/src/internal/bytealg/indexbyte_mipsx.s
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build mips || mipsle
 // +build mips mipsle
 
 #include "go_asm.h"
diff --git a/src/internal/bytealg/indexbyte_ppc64x.s b/src/internal/bytealg/indexbyte_ppc64x.s
index 6e14e80af1..8e13c5a56e 100644
--- a/src/internal/bytealg/indexbyte_ppc64x.s
+++ b/src/internal/bytealg/indexbyte_ppc64x.s
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build ppc64 || ppc64le
 // +build ppc64 ppc64le
 
 #include "go_asm.h"
diff --git a/src/internal/cpu/cpu_x86.s b/src/internal/cpu/cpu_x86.s
index 93c712d784..0df5da1cc7 100644
--- a/src/internal/cpu/cpu_x86.s
+++ b/src/internal/cpu/cpu_x86.s
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build 386 || amd64
 // +build 386 amd64
 
 #include "textflag.h"
diff --git a/src/internal/reflectlite/all_test.go b/src/internal/reflectlite/all_test.go
index e2c4f30487..e15f364fcd 100644
--- a/src/internal/reflectlite/all_test.go
+++ b/src/internal/reflectlite/all_test.go
@@ -982,19 +982,6 @@ func TestNames(t *testing.T) {
 	}
 }
 
-type embed struct {
-	EmbedWithUnexpMeth
-}
-
-func TestNameBytesAreAligned(t *testing.T) {
-	typ := TypeOf(embed{})
-	b := FirstMethodNameBytes(typ)
-	v := uintptr(unsafe.Pointer(b))
-	if v%unsafe.Alignof((*byte)(nil)) != 0 {
-		t.Errorf("reflect.name.bytes pointer is not aligned: %x", v)
-	}
-}
-
 // TestUnaddressableField tests that the reflect package will not allow
 // a type from another package to be used as a named type with an
 // unexported field.
diff --git a/src/internal/reflectlite/type.go b/src/internal/reflectlite/type.go
index 15ba30da36..b1899b0191 100644
--- a/src/internal/reflectlite/type.go
+++ b/src/internal/reflectlite/type.go
@@ -68,7 +68,7 @@ type Type interface {
 }
 
 /*
- * These data structures are known to the compiler (../../cmd/internal/gc/reflect.go).
+ * These data structures are known to the compiler (../../cmd/internal/reflectdata/reflect.go).
  * A few are known to ../runtime/type.go to convey to debuggers.
  * They are also known to ../runtime/type.go.
  */
@@ -111,7 +111,7 @@ const (
 // available in the memory directly following the rtype value.
 //
 // tflag values must be kept in sync with copies in:
-//	cmd/compile/internal/gc/reflect.go
+//	cmd/compile/internal/reflectdata/reflect.go
 //	cmd/link/internal/ld/decodesym.go
 //	runtime/type.go
 type tflag uint8
@@ -321,49 +321,55 @@ func (n name) isExported() bool {
 	return (*n.bytes)&(1<<0) != 0
 }
 
-func (n name) nameLen() int {
-	return int(uint16(*n.data(1, "name len field"))<<8 | uint16(*n.data(2, "name len field")))
+func (n name) hasTag() bool {
+	return (*n.bytes)&(1<<1) != 0
 }
 
-func (n name) tagLen() int {
-	if *n.data(0, "name flag field")&(1<<1) == 0 {
-		return 0
+// readVarint parses a varint as encoded by encoding/binary.
+// It returns the number of encoded bytes and the encoded value.
+func (n name) readVarint(off int) (int, int) {
+	v := 0
+	for i := 0; ; i++ {
+		x := *n.data(off+i, "read varint")
+		v += int(x&0x7f) << (7 * i)
+		if x&0x80 == 0 {
+			return i + 1, v
+		}
 	}
-	off := 3 + n.nameLen()
-	return int(uint16(*n.data(off, "name taglen field"))<<8 | uint16(*n.data(off+1, "name taglen field")))
 }
 
 func (n name) name() (s string) {
 	if n.bytes == nil {
 		return
 	}
-	b := (*[4]byte)(unsafe.Pointer(n.bytes))
-
+	i, l := n.readVarint(1)
 	hdr := (*unsafeheader.String)(unsafe.Pointer(&s))
-	hdr.Data = unsafe.Pointer(&b[3])
-	hdr.Len = int(b[1])<<8 | int(b[2])
-	return s
+	hdr.Data = unsafe.Pointer(n.data(1+i, "non-empty string"))
+	hdr.Len = l
+	return
 }
 
 func (n name) tag() (s string) {
-	tl := n.tagLen()
-	if tl == 0 {
+	if !n.hasTag() {
 		return ""
 	}
-	nl := n.nameLen()
+	i, l := n.readVarint(1)
+	i2, l2 := n.readVarint(1 + i + l)
 	hdr := (*unsafeheader.String)(unsafe.Pointer(&s))
-	hdr.Data = unsafe.Pointer(n.data(3+nl+2, "non-empty string"))
-	hdr.Len = tl
-	return s
+	hdr.Data = unsafe.Pointer(n.data(1+i+l+i2, "non-empty string"))
+	hdr.Len = l2
+	return
 }
 
 func (n name) pkgPath() string {
 	if n.bytes == nil || *n.data(0, "name flag field")&(1<<2) == 0 {
 		return ""
 	}
-	off := 3 + n.nameLen()
-	if tl := n.tagLen(); tl > 0 {
-		off += 2 + tl
+	i, l := n.readVarint(1)
+	off := 1 + i + l
+	if n.hasTag() {
+		i2, l2 := n.readVarint(off)
+		off += i2 + l2
 	}
 	var nameOff int32
 	// Note that this field may not be aligned in memory,
diff --git a/src/io/fs/example_test.go b/src/io/fs/example_test.go
new file mode 100644
index 0000000000..c9027034c4
--- /dev/null
+++ b/src/io/fs/example_test.go
@@ -0,0 +1,25 @@
+// Copyright 2021 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package fs_test
+
+import (
+	"fmt"
+	"io/fs"
+	"log"
+	"os"
+)
+
+func ExampleWalkDir() {
+	root := "/usr/local/go/bin"
+	fileSystem := os.DirFS(root)
+
+	fs.WalkDir(fileSystem, ".", func(path string, d fs.DirEntry, err error) error {
+		if err != nil {
+			log.Fatal(err)
+		}
+		fmt.Println(path)
+		return nil
+	})
+}
diff --git a/src/io/fs/sub.go b/src/io/fs/sub.go
index 7822e555ea..ae20e030a9 100644
--- a/src/io/fs/sub.go
+++ b/src/io/fs/sub.go
@@ -19,10 +19,10 @@ type SubFS interface {
 
 // Sub returns an FS corresponding to the subtree rooted at fsys's dir.
 //
-// If fs implements SubFS, Sub calls returns fsys.Sub(dir).
-// Otherwise, if dir is ".", Sub returns fsys unchanged.
+// If dir is ".", Sub returns fsys unchanged.
+// Otherwise, if fs implements SubFS, Sub returns fsys.Sub(dir).
 // Otherwise, Sub returns a new FS implementation sub that,
-// in effect, implements sub.Open(dir) as fsys.Open(path.Join(dir, name)).
+// in effect, implements sub.Open(name) as fsys.Open(path.Join(dir, name)).
 // The implementation also translates calls to ReadDir, ReadFile, and Glob appropriately.
 //
 // Note that Sub(os.DirFS("/"), "prefix") is equivalent to os.DirFS("/prefix")
diff --git a/src/make.bash b/src/make.bash
index 3d1b0c87e7..4fb13f6275 100755
--- a/src/make.bash
+++ b/src/make.bash
@@ -132,10 +132,11 @@ fi
 
 # Test which linker/loader our system is using
 if type readelf >/dev/null 2>&1; then
-	echo "int main() { return 0; }" | ${CC:-cc} -o ./test-musl-ldso -x c - || continue
-	LDSO=$(readelf -l ./test-musl-ldso | grep 'interpreter:' | sed -e 's/^.*interpreter: \(.*\)[]]/\1/') >/dev/null 2>&1
-	[ -z "$LDSO" ] || export GO_LDSO="$LDSO"
-	rm -f ./test-musl-ldso
+	if echo "int main() { return 0; }" | ${CC:-cc} -o ./test-musl-ldso -x c - >/dev/null 2>&1; then
+		LDSO=$(readelf -l ./test-musl-ldso | grep 'interpreter:' | sed -e 's/^.*interpreter: \(.*\)[]]/\1/') >/dev/null 2>&1
+		[ -z "$LDSO" ] || export GO_LDSO="$LDSO"
+		rm -f ./test-musl-ldso
+	fi
 fi
 
 # Clean old generated file that will cause problems in the build.
diff --git a/src/math/big/arith.go b/src/math/big/arith.go
index e1947936d4..8f55c195d4 100644
--- a/src/math/big/arith.go
+++ b/src/math/big/arith.go
@@ -267,20 +267,6 @@ func divWW(x1, x0, y, m Word) (q, r Word) {
 	return Word(qq), Word(r0 >> s)
 }
 
-func divWVW(z []Word, xn Word, x []Word, y Word) (r Word) {
-	r = xn
-	if len(x) == 1 {
-		qq, rr := bits.Div(uint(r), uint(x[0]), uint(y))
-		z[0] = Word(qq)
-		return Word(rr)
-	}
-	rec := reciprocalWord(y)
-	for i := len(z) - 1; i >= 0; i-- {
-		z[i], r = divWW(r, x[i], y, rec)
-	}
-	return r
-}
-
 // reciprocalWord return the reciprocal of the divisor. rec = floor(( _B^2 - 1 ) / u - _B). u = d1 << nlz(d1).
 func reciprocalWord(d1 Word) Word {
 	u := uint(d1 << nlz(d1))
diff --git a/src/math/big/arith_386.s b/src/math/big/arith_386.s
index d0ea949fe6..acf2b06665 100644
--- a/src/math/big/arith_386.s
+++ b/src/math/big/arith_386.s
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build !math_big_pure_go
 // +build !math_big_pure_go
 
 #include "textflag.h"
diff --git a/src/math/big/arith_amd64.s b/src/math/big/arith_amd64.s
index 61043ca2d9..59be952200 100644
--- a/src/math/big/arith_amd64.s
+++ b/src/math/big/arith_amd64.s
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build !math_big_pure_go
 // +build !math_big_pure_go
 
 #include "textflag.h"
diff --git a/src/math/big/arith_arm.s b/src/math/big/arith_arm.s
index cbf7445e7a..f2872d80a1 100644
--- a/src/math/big/arith_arm.s
+++ b/src/math/big/arith_arm.s
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build !math_big_pure_go
 // +build !math_big_pure_go
 
 #include "textflag.h"
diff --git a/src/math/big/arith_arm64.s b/src/math/big/arith_arm64.s
index 22357d088e..7bfe08e7b7 100644
--- a/src/math/big/arith_arm64.s
+++ b/src/math/big/arith_arm64.s
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build !math_big_pure_go
 // +build !math_big_pure_go
 
 #include "textflag.h"
diff --git a/src/math/big/arith_mips64x.s b/src/math/big/arith_mips64x.s
index 804b9fe06e..4b5c502440 100644
--- a/src/math/big/arith_mips64x.s
+++ b/src/math/big/arith_mips64x.s
@@ -2,7 +2,9 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build !math_big_pure_go,mips64 !math_big_pure_go,mips64le
+//go:build !math_big_pure_go && (mips64 || mips64le)
+// +build !math_big_pure_go
+// +build mips64 mips64le
 
 #include "textflag.h"
 
diff --git a/src/math/big/arith_mipsx.s b/src/math/big/arith_mipsx.s
index efdecb80f3..e72e6d6377 100644
--- a/src/math/big/arith_mipsx.s
+++ b/src/math/big/arith_mipsx.s
@@ -2,7 +2,9 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build !math_big_pure_go,mips !math_big_pure_go,mipsle
+//go:build !math_big_pure_go && (mips || mipsle)
+// +build !math_big_pure_go
+// +build mips mipsle
 
 #include "textflag.h"
 
diff --git a/src/math/big/arith_ppc64x.s b/src/math/big/arith_ppc64x.s
index b299ccc2fb..68c6286494 100644
--- a/src/math/big/arith_ppc64x.s
+++ b/src/math/big/arith_ppc64x.s
@@ -2,7 +2,9 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build !math_big_pure_go,ppc64 !math_big_pure_go,ppc64le
+//go:build !math_big_pure_go && (ppc64 || ppc64le)
+// +build !math_big_pure_go
+// +build ppc64 ppc64le
 
 #include "textflag.h"
 
diff --git a/src/math/big/arith_riscv64.s b/src/math/big/arith_riscv64.s
index a2f7666c7b..2e950ddd0f 100644
--- a/src/math/big/arith_riscv64.s
+++ b/src/math/big/arith_riscv64.s
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build !math_big_pure_go && riscv64
 // +build !math_big_pure_go,riscv64
 
 #include "textflag.h"
diff --git a/src/math/big/arith_s390x.s b/src/math/big/arith_s390x.s
index e96480699a..ad822f76b3 100644
--- a/src/math/big/arith_s390x.s
+++ b/src/math/big/arith_s390x.s
@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build !math_big_pure_go,s390x
+//go:build !math_big_pure_go
+// +build !math_big_pure_go
 
 #include "textflag.h"
 
diff --git a/src/math/big/arith_wasm.s b/src/math/big/arith_wasm.s
index add1064469..e8605f1e15 100644
--- a/src/math/big/arith_wasm.s
+++ b/src/math/big/arith_wasm.s
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build !math_big_pure_go
 // +build !math_big_pure_go
 
 #include "textflag.h"
diff --git a/src/math/big/int.go b/src/math/big/int.go
index 65f32487b5..7647346486 100644
--- a/src/math/big/int.go
+++ b/src/math/big/int.go
@@ -425,7 +425,7 @@ func (z *Int) SetString(s string, base int) (*Int, bool) {
 	return z.setFromScanner(strings.NewReader(s), base)
 }
 
-// setFromScanner implements SetString given an io.BytesScanner.
+// setFromScanner implements SetString given an io.ByteScanner.
 // For documentation see comments of SetString.
 func (z *Int) setFromScanner(r io.ByteScanner, base int) (*Int, bool) {
 	if _, _, err := z.scan(r, base); err != nil {
diff --git a/src/math/big/nat.go b/src/math/big/nat.go
index bbd6c8850b..140c619c8c 100644
--- a/src/math/big/nat.go
+++ b/src/math/big/nat.go
@@ -631,48 +631,6 @@ func (z nat) mulRange(a, b uint64) nat {
 	return z.mul(nat(nil).mulRange(a, m), nat(nil).mulRange(m+1, b))
 }
 
-// q = (x-r)/y, with 0 <= r < y
-func (z nat) divW(x nat, y Word) (q nat, r Word) {
-	m := len(x)
-	switch {
-	case y == 0:
-		panic("division by zero")
-	case y == 1:
-		q = z.set(x) // result is x
-		return
-	case m == 0:
-		q = z[:0] // result is 0
-		return
-	}
-	// m > 0
-	z = z.make(m)
-	r = divWVW(z, 0, x, y)
-	q = z.norm()
-	return
-}
-
-func (z nat) div(z2, u, v nat) (q, r nat) {
-	if len(v) == 0 {
-		panic("division by zero")
-	}
-
-	if u.cmp(v) < 0 {
-		q = z[:0]
-		r = z2.set(u)
-		return
-	}
-
-	if len(v) == 1 {
-		var r2 Word
-		q, r2 = z.divW(u, v[0])
-		r = z2.setWord(r2)
-		return
-	}
-
-	q, r = z.divLarge(z2, u, v)
-	return
-}
-
 // getNat returns a *nat of len n. The contents may not be zero.
 // The pool holds *nat to avoid allocation when converting to interface{}.
 func getNat(n int) *nat {
@@ -693,276 +651,6 @@ func putNat(x *nat) {
 
 var natPool sync.Pool
 
-// q = (uIn-r)/vIn, with 0 <= r < vIn
-// Uses z as storage for q, and u as storage for r if possible.
-// See Knuth, Volume 2, section 4.3.1, Algorithm D.
-// Preconditions:
-//    len(vIn) >= 2
-//    len(uIn) >= len(vIn)
-//    u must not alias z
-func (z nat) divLarge(u, uIn, vIn nat) (q, r nat) {
-	n := len(vIn)
-	m := len(uIn) - n
-
-	// D1.
-	shift := nlz(vIn[n-1])
-	// do not modify vIn, it may be used by another goroutine simultaneously
-	vp := getNat(n)
-	v := *vp
-	shlVU(v, vIn, shift)
-
-	// u may safely alias uIn or vIn, the value of uIn is used to set u and vIn was already used
-	u = u.make(len(uIn) + 1)
-	u[len(uIn)] = shlVU(u[0:len(uIn)], uIn, shift)
-
-	// z may safely alias uIn or vIn, both values were used already
-	if alias(z, u) {
-		z = nil // z is an alias for u - cannot reuse
-	}
-	q = z.make(m + 1)
-
-	if n < divRecursiveThreshold {
-		q.divBasic(u, v)
-	} else {
-		q.divRecursive(u, v)
-	}
-	putNat(vp)
-
-	q = q.norm()
-	shrVU(u, u, shift)
-	r = u.norm()
-
-	return q, r
-}
-
-// divBasic performs word-by-word division of u by v.
-// The quotient is written in pre-allocated q.
-// The remainder overwrites input u.
-//
-// Precondition:
-// - q is large enough to hold the quotient u / v
-//   which has a maximum length of len(u)-len(v)+1.
-func (q nat) divBasic(u, v nat) {
-	n := len(v)
-	m := len(u) - n
-
-	qhatvp := getNat(n + 1)
-	qhatv := *qhatvp
-
-	// D2.
-	vn1 := v[n-1]
-	rec := reciprocalWord(vn1)
-	for j := m; j >= 0; j-- {
-		// D3.
-		qhat := Word(_M)
-		var ujn Word
-		if j+n < len(u) {
-			ujn = u[j+n]
-		}
-		if ujn != vn1 {
-			var rhat Word
-			qhat, rhat = divWW(ujn, u[j+n-1], vn1, rec)
-
-			// x1 | x2 = q̂v_{n-2}
-			vn2 := v[n-2]
-			x1, x2 := mulWW(qhat, vn2)
-			// test if q̂v_{n-2} > br̂ + u_{j+n-2}
-			ujn2 := u[j+n-2]
-			for greaterThan(x1, x2, rhat, ujn2) {
-				qhat--
-				prevRhat := rhat
-				rhat += vn1
-				// v[n-1] >= 0, so this tests for overflow.
-				if rhat < prevRhat {
-					break
-				}
-				x1, x2 = mulWW(qhat, vn2)
-			}
-		}
-
-		// D4.
-		// Compute the remainder u - (q̂*v) << (_W*j).
-		// The subtraction may overflow if q̂ estimate was off by one.
-		qhatv[n] = mulAddVWW(qhatv[0:n], v, qhat, 0)
-		qhl := len(qhatv)
-		if j+qhl > len(u) && qhatv[n] == 0 {
-			qhl--
-		}
-		c := subVV(u[j:j+qhl], u[j:], qhatv)
-		if c != 0 {
-			c := addVV(u[j:j+n], u[j:], v)
-			// If n == qhl, the carry from subVV and the carry from addVV
-			// cancel out and don't affect u[j+n].
-			if n < qhl {
-				u[j+n] += c
-			}
-			qhat--
-		}
-
-		if j == m && m == len(q) && qhat == 0 {
-			continue
-		}
-		q[j] = qhat
-	}
-
-	putNat(qhatvp)
-}
-
-const divRecursiveThreshold = 100
-
-// divRecursive performs word-by-word division of u by v.
-// The quotient is written in pre-allocated z.
-// The remainder overwrites input u.
-//
-// Precondition:
-// - len(z) >= len(u)-len(v)
-//
-// See Burnikel, Ziegler, "Fast Recursive Division", Algorithm 1 and 2.
-func (z nat) divRecursive(u, v nat) {
-	// Recursion depth is less than 2 log2(len(v))
-	// Allocate a slice of temporaries to be reused across recursion.
-	recDepth := 2 * bits.Len(uint(len(v)))
-	// large enough to perform Karatsuba on operands as large as v
-	tmp := getNat(3 * len(v))
-	temps := make([]*nat, recDepth)
-	z.clear()
-	z.divRecursiveStep(u, v, 0, tmp, temps)
-	for _, n := range temps {
-		if n != nil {
-			putNat(n)
-		}
-	}
-	putNat(tmp)
-}
-
-// divRecursiveStep computes the division of u by v.
-// - z must be large enough to hold the quotient
-// - the quotient will overwrite z
-// - the remainder will overwrite u
-func (z nat) divRecursiveStep(u, v nat, depth int, tmp *nat, temps []*nat) {
-	u = u.norm()
-	v = v.norm()
-
-	if len(u) == 0 {
-		z.clear()
-		return
-	}
-	n := len(v)
-	if n < divRecursiveThreshold {
-		z.divBasic(u, v)
-		return
-	}
-	m := len(u) - n
-	if m < 0 {
-		return
-	}
-
-	// Produce the quotient by blocks of B words.
-	// Division by v (length n) is done using a length n/2 division
-	// and a length n/2 multiplication for each block. The final
-	// complexity is driven by multiplication complexity.
-	B := n / 2
-
-	// Allocate a nat for qhat below.
-	if temps[depth] == nil {
-		temps[depth] = getNat(n)
-	} else {
-		*temps[depth] = temps[depth].make(B + 1)
-	}
-
-	j := m
-	for j > B {
-		// Divide u[j-B:j+n] by vIn. Keep remainder in u
-		// for next block.
-		//
-		// The following property will be used (Lemma 2):
-		// if u = u1 << s + u0
-		//    v = v1 << s + v0
-		// then floor(u1/v1) >= floor(u/v)
-		//
-		// Moreover, the difference is at most 2 if len(v1) >= len(u/v)
-		// We choose s = B-1 since len(v)-s >= B+1 >= len(u/v)
-		s := (B - 1)
-		// Except for the first step, the top bits are always
-		// a division remainder, so the quotient length is <= n.
-		uu := u[j-B:]
-
-		qhat := *temps[depth]
-		qhat.clear()
-		qhat.divRecursiveStep(uu[s:B+n], v[s:], depth+1, tmp, temps)
-		qhat = qhat.norm()
-		// Adjust the quotient:
-		//    u = u_h << s + u_l
-		//    v = v_h << s + v_l
-		//  u_h = q̂ v_h + rh
-		//    u = q̂ (v - v_l) + rh << s + u_l
-		// After the above step, u contains a remainder:
-		//    u = rh << s + u_l
-		// and we need to subtract q̂ v_l
-		//
-		// But it may be a bit too large, in which case q̂ needs to be smaller.
-		qhatv := tmp.make(3 * n)
-		qhatv.clear()
-		qhatv = qhatv.mul(qhat, v[:s])
-		for i := 0; i < 2; i++ {
-			e := qhatv.cmp(uu.norm())
-			if e <= 0 {
-				break
-			}
-			subVW(qhat, qhat, 1)
-			c := subVV(qhatv[:s], qhatv[:s], v[:s])
-			if len(qhatv) > s {
-				subVW(qhatv[s:], qhatv[s:], c)
-			}
-			addAt(uu[s:], v[s:], 0)
-		}
-		if qhatv.cmp(uu.norm()) > 0 {
-			panic("impossible")
-		}
-		c := subVV(uu[:len(qhatv)], uu[:len(qhatv)], qhatv)
-		if c > 0 {
-			subVW(uu[len(qhatv):], uu[len(qhatv):], c)
-		}
-		addAt(z, qhat, j-B)
-		j -= B
-	}
-
-	// Now u < (v< 0 {
-			subVW(qhat, qhat, 1)
-			c := subVV(qhatv[:s], qhatv[:s], v[:s])
-			if len(qhatv) > s {
-				subVW(qhatv[s:], qhatv[s:], c)
-			}
-			addAt(u[s:], v[s:], 0)
-		}
-	}
-	if qhatv.cmp(u.norm()) > 0 {
-		panic("impossible")
-	}
-	c := subVV(u[0:len(qhatv)], u[0:len(qhatv)], qhatv)
-	if c > 0 {
-		c = subVW(u[len(qhatv):], u[len(qhatv):], c)
-	}
-	if c > 0 {
-		panic("impossible")
-	}
-
-	// Done!
-	addAt(z, qhat.norm(), 0)
-}
-
 // Length of x in bits. x must be normalized.
 func (x nat) bitLen() int {
 	if i := len(x) - 1; i >= 0 {
@@ -1170,19 +858,6 @@ func (z nat) xor(x, y nat) nat {
 	return z.norm()
 }
 
-// greaterThan reports whether (x1<<_W + x2) > (y1<<_W + y2)
-func greaterThan(x1, x2, y1, y2 Word) bool {
-	return x1 > y1 || x1 == y1 && x2 > y2
-}
-
-// modW returns x % d.
-func (x nat) modW(d Word) (r Word) {
-	// TODO(agl): we don't actually need to store the q value.
-	var q nat
-	q = q.make(len(x))
-	return divWVW(q, 0, x, d)
-}
-
 // random creates a random integer in [0..limit), using the space in z if
 // possible. n is the bit length of limit.
 func (z nat) random(rand *rand.Rand, limit nat, n int) nat {
diff --git a/src/math/big/natdiv.go b/src/math/big/natdiv.go
new file mode 100644
index 0000000000..882bb6d3ba
--- /dev/null
+++ b/src/math/big/natdiv.go
@@ -0,0 +1,884 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+/*
+
+Multi-precision division. Here be dragons.
+
+Given u and v, where u is n+m digits, and v is n digits (with no leading zeros),
+the goal is to return quo, rem such that u = quo*v + rem, where 0 ≤ rem < v.
+That is, quo = ⌊u/v⌋ where ⌊x⌋ denotes the floor (truncation to integer) of x,
+and rem = u - quo·v.
+
+
+Long Division
+
+Division in a computer proceeds the same as long division in elementary school,
+but computers are not as good as schoolchildren at following vague directions,
+so we have to be much more precise about the actual steps and what can happen.
+
+We work from most to least significant digit of the quotient, doing:
+
+ • Guess a digit q, the number of v to subtract from the current
+   section of u to zero out the topmost digit.
+ • Check the guess by multiplying q·v and comparing it against
+   the current section of u, adjusting the guess as needed.
+ • Subtract q·v from the current section of u.
+ • Add q to the corresponding section of the result quo.
+
+When all digits have been processed, the final remainder is left in u
+and returned as rem.
+
+For example, here is a sketch of dividing 5 digits by 3 digits (n=3, m=2).
+
+	                 q₂ q₁ q₀
+	         _________________
+	v₂ v₁ v₀ ) u₄ u₃ u₂ u₁ u₀
+	           ↓  ↓  ↓  |  |
+	          [u₄ u₃ u₂]|  |
+	        - [  q₂·v  ]|  |
+	        ----------- ↓  |
+	          [  rem  | u₁]|
+	        - [    q₁·v   ]|
+	           ----------- ↓
+	             [  rem  | u₀]
+	           - [    q₀·v   ]
+	              ------------
+	                [  rem   ]
+
+Instead of creating new storage for the remainders and copying digits from u
+as indicated by the arrows, we use u's storage directly as both the source
+and destination of the subtractions, so that the remainders overwrite
+successive overlapping sections of u as the division proceeds, using a slice
+of u to identify the current section. This avoids all the copying as well as
+shifting of remainders.
+
+Division of u with n+m digits by v with n digits (in base B) can in general
+produce at most m+1 digits, because:
+
+  • u < B^(n+m)               [B^(n+m) has n+m+1 digits]
+  • v ≥ B^(n-1)               [B^(n-1) is the smallest n-digit number]
+  • u/v < B^(n+m) / B^(n-1)   [divide bounds for u, v]
+  • u/v < B^(m+1)             [simplify]
+
+The first step is special: it takes the top n digits of u and divides them by
+the n digits of v, producing the first quotient digit and an n-digit remainder.
+In the example, q₂ = ⌊u₄u₃u₂ / v⌋.
+
+The first step divides n digits by n digits to ensure that it produces only a
+single digit.
+
+Each subsequent step appends the next digit from u to the remainder and divides
+those n+1 digits by the n digits of v, producing another quotient digit and a
+new n-digit remainder.
+
+Subsequent steps divide n+1 digits by n digits, an operation that in general
+might produce two digits. However, as used in the algorithm, that division is
+guaranteed to produce only a single digit. The dividend is of the form
+rem·B + d, where rem is a remainder from the previous step and d is a single
+digit, so:
+
+ • rem ≤ v - 1                 [rem is a remainder from dividing by v]
+ • rem·B ≤ v·B - B             [multiply by B]
+ • d ≤ B - 1                   [d is a single digit]
+ • rem·B + d ≤ v·B - 1         [add]
+ • rem·B + d < v·B             [change ≤ to <]
+ • (rem·B + d)/v < B           [divide by v]
+
+
+Guess and Check
+
+At each step we need to divide n+1 digits by n digits, but this is for the
+implementation of division by n digits, so we can't just invoke a division
+routine: we _are_ the division routine. Instead, we guess at the answer and
+then check it using multiplication. If the guess is wrong, we correct it.
+
+How can this guessing possibly be efficient? It turns out that the following
+statement (let's call it the Good Guess Guarantee) is true.
+
+If
+
+ • q = ⌊u/v⌋ where u is n+1 digits and v is n digits,
+ • q < B, and
+ • the topmost digit of v = vₙ₋₁ ≥ B/2,
+
+then q̂ = ⌊uₙuₙ₋₁ / vₙ₋₁⌋ satisfies q ≤ q̂ ≤ q+2. (Proof below.)
+
+That is, if we know the answer has only a single digit and we guess an answer
+by ignoring the bottom n-1 digits of u and v, using a 2-by-1-digit division,
+then that guess is at least as large as the correct answer. It is also not
+too much larger: it is off by at most two from the correct answer.
+
+Note that in the first step of the overall division, which is an n-by-n-digit
+division, the 2-by-1 guess uses an implicit uₙ = 0.
+
+Note that using a 2-by-1-digit division here does not mean calling ourselves
+recursively. Instead, we use an efficient direct hardware implementation of
+that operation.
+
+Note that because q is u/v rounded down, q·v must not exceed u: u ≥ q·v.
+If a guess q̂ is too big, it will not satisfy this test. Viewed a different way,
+the remainder r̂ for a given q̂ is u - q̂·v, which must be positive. If it is
+negative, then the guess q̂ is too big.
+
+This gives us a way to compute q. First compute q̂ with 2-by-1-digit division.
+Then, while u < q̂·v, decrement q̂; this loop executes at most twice, because
+q̂ ≤ q+2.
+
+
+Scaling Inputs
+
+The Good Guess Guarantee requires that the top digit of v (vₙ₋₁) be at least B/2.
+For example in base 10, ⌊172/19⌋ = 9, but ⌊18/1⌋ = 18: the guess is wildly off
+because the first digit 1 is smaller than B/2 = 5.
+
+We can ensure that v has a large top digit by multiplying both u and v by the
+right amount. Continuing the example, if we multiply both 172 and 19 by 3, we
+now have ⌊516/57⌋, the leading digit of v is now ≥ 5, and sure enough
+⌊51/5⌋ = 10 is much closer to the correct answer 9. It would be easier here
+to multiply by 4, because that can be done with a shift. Specifically, we can
+always count the number of leading zeros i in the first digit of v and then
+shift both u and v left by i bits.
+
+Having scaled u and v, the value ⌊u/v⌋ is unchanged, but the remainder will
+be scaled: 172 mod 19 is 1, but 516 mod 57 is 3. We have to divide the remainder
+by the scaling factor (shifting right i bits) when we finish.
+
+Note that these shifts happen before and after the entire division algorithm,
+not at each step in the per-digit iteration.
+
+Note the effect of scaling inputs on the size of the possible quotient.
+In the scaled u/v, u can gain a digit from scaling; v never does, because we
+pick the scaling factor to make v's top digit larger but without overflowing.
+If u and v have n+m and n digits after scaling, then:
+
+  • u < B^(n+m)               [B^(n+m) has n+m+1 digits]
+  • v ≥ B^n / 2               [vₙ₋₁ ≥ B/2, so vₙ₋₁·B^(n-1) ≥ B^n/2]
+  • u/v < B^(n+m) / (B^n / 2) [divide bounds for u, v]
+  • u/v < 2 B^m               [simplify]
+
+The quotient can still have m+1 significant digits, but if so the top digit
+must be a 1. This provides a different way to handle the first digit of the
+result: compare the top n digits of u against v and fill in either a 0 or a 1.
+
+
+Refining Guesses
+
+Before we check whether u < q̂·v, we can adjust our guess to change it from
+q̂ = ⌊uₙuₙ₋₁ / vₙ₋₁⌋ into the refined guess ⌊uₙuₙ₋₁uₙ₋₂ / vₙ₋₁vₙ₋₂⌋.
+Although not mentioned above, the Good Guess Guarantee also promises that this
+3-by-2-digit division guess is more precise and at most one away from the real
+answer q. The improvement from the 2-by-1 to the 3-by-2 guess can also be done
+without n-digit math.
+
+If we have a guess q̂ = ⌊uₙuₙ₋₁ / vₙ₋₁⌋ and we want to see if it also equal to
+⌊uₙuₙ₋₁uₙ₋₂ / vₙ₋₁vₙ₋₂⌋, we can use the same check we would for the full division:
+if uₙuₙ₋₁uₙ₋₂ < q̂·vₙ₋₁vₙ₋₂, then the guess is too large and should be reduced.
+
+Checking uₙuₙ₋₁uₙ₋₂ < q̂·vₙ₋₁vₙ₋₂ is the same as uₙuₙ₋₁uₙ₋₂ - q̂·vₙ₋₁vₙ₋₂ < 0,
+and
+
+	uₙuₙ₋₁uₙ₋₂ - q̂·vₙ₋₁vₙ₋₂ = (uₙuₙ₋₁·B + uₙ₋₂) - q̂·(vₙ₋₁·B + vₙ₋₂)
+	                          [splitting off the bottom digit]
+	                      = (uₙuₙ₋₁ - q̂·vₙ₋₁)·B + uₙ₋₂ - q̂·vₙ₋₂
+	                          [regrouping]
+
+The expression (uₙuₙ₋₁ - q̂·vₙ₋₁) is the remainder of uₙuₙ₋₁ / vₙ₋₁.
+If the initial guess returns both q̂ and its remainder r̂, then checking
+whether uₙuₙ₋₁uₙ₋₂ < q̂·vₙ₋₁vₙ₋₂ is the same as checking r̂·B + uₙ₋₂ < q̂·vₙ₋₂.
+
+If we find that r̂·B + uₙ₋₂ < q̂·vₙ₋₂, then we can adjust the guess by
+decrementing q̂ and adding vₙ₋₁ to r̂. We repeat until r̂·B + uₙ₋₂ ≥ q̂·vₙ₋₂.
+(As before, this fixup is only needed at most twice.)
+
+Now that q̂ = ⌊uₙuₙ₋₁uₙ₋₂ / vₙ₋₁vₙ₋₂⌋, as mentioned above it is at most one
+away from the correct q, and we've avoided doing any n-digit math.
+(If we need the new remainder, it can be computed as r̂·B + uₙ₋₂ - q̂·vₙ₋₂.)
+
+The final check u < q̂·v and the possible fixup must be done at full precision.
+For random inputs, a fixup at this step is exceedingly rare: the 3-by-2 guess
+is not often wrong at all. But still we must do the check. Note that since the
+3-by-2 guess is off by at most 1, it can be convenient to perform the final
+u < q̂·v as part of the computation of the remainder r = u - q̂·v. If the
+subtraction underflows, decremeting q̂ and adding one v back to r is enough to
+arrive at the final q, r.
+
+That's the entirety of long division: scale the inputs, and then loop over
+each output position, guessing, checking, and correcting the next output digit.
+
+For a 2n-digit number divided by an n-digit number (the worst size-n case for
+division complexity), this algorithm uses n+1 iterations, each of which must do
+at least the 1-by-n-digit multiplication q̂·v. That's O(n) iterations of
+O(n) time each, so O(n²) time overall.
+
+
+Recursive Division
+
+For very large inputs, it is possible to improve on the O(n²) algorithm.
+Let's call a group of n/2 real digits a (very) “wide digit”. We can run the
+standard long division algorithm explained above over the wide digits instead of
+the actual digits. This will result in many fewer steps, but the math involved in
+each step is more work.
+
+Where basic long division uses a 2-by-1-digit division to guess the initial q̂,
+the new algorithm must use a 2-by-1-wide-digit division, which is of course
+really an n-by-n/2-digit division. That's OK: if we implement n-digit division
+in terms of n/2-digit division, the recursion will terminate when the divisor
+becomes small enough to handle with standard long division or even with the
+2-by-1 hardware instruction.
+
+For example, here is a sketch of dividing 10 digits by 4, proceeding with
+wide digits corresponding to two regular digits. The first step, still special,
+must leave off a (regular) digit, dividing 5 by 4 and producing a 4-digit
+remainder less than v. The middle steps divide 6 digits by 4, guaranteed to
+produce two output digits each (one wide digit) with 4-digit remainders.
+The final step must use what it has: the 4-digit remainder plus one more,
+5 digits to divide by 4.
+
+	                       q₆ q₅ q₄ q₃ q₂ q₁ q₀
+	            _______________________________
+	v₃ v₂ v₁ v₀ ) u₉ u₈ u₇ u₆ u₅ u₄ u₃ u₂ u₁ u₀
+	              ↓  ↓  ↓  ↓  ↓  |  |  |  |  |
+	             [u₉ u₈ u₇ u₆ u₅]|  |  |  |  |
+	           - [    q₆q₅·v    ]|  |  |  |  |
+	           ----------------- ↓  ↓  |  |  |
+	                [    rem    |u₄ u₃]|  |  |
+	              - [     q₄q₃·v      ]|  |  |
+	              -------------------- ↓  ↓  |
+	                      [    rem    |u₂ u₁]|
+	                    - [     q₂q₁·v      ]|
+	                    -------------------- ↓
+	                            [    rem    |u₀]
+	                          - [     q₀·v     ]
+	                          ------------------
+	                               [    rem    ]
+
+An alternative would be to look ahead to how well n/2 divides into n+m and
+adjust the first step to use fewer digits as needed, making the first step
+more special to make the last step not special at all. For example, using the
+same input, we could choose to use only 4 digits in the first step, leaving
+a full wide digit for the last step:
+
+	                       q₆ q₅ q₄ q₃ q₂ q₁ q₀
+	            _______________________________
+	v₃ v₂ v₁ v₀ ) u₉ u₈ u₇ u₆ u₅ u₄ u₃ u₂ u₁ u₀
+	              ↓  ↓  ↓  ↓  |  |  |  |  |  |
+	             [u₉ u₈ u₇ u₆]|  |  |  |  |  |
+	           - [    q₆·v   ]|  |  |  |  |  |
+	           -------------- ↓  ↓  |  |  |  |
+	             [    rem    |u₅ u₄]|  |  |  |
+	           - [     q₅q₄·v      ]|  |  |  |
+	           -------------------- ↓  ↓  |  |
+	                   [    rem    |u₃ u₂]|  |
+	                 - [     q₃q₂·v      ]|  |
+	                 -------------------- ↓  ↓
+	                         [    rem    |u₁ u₀]
+	                       - [     q₁q₀·v      ]
+	                       ---------------------
+	                               [    rem    ]
+
+Today, the code in divRecursiveStep works like the first example. Perhaps in
+the future we will make it work like the alternative, to avoid a special case
+in the final iteration.
+
+Either way, each step is a 3-by-2-wide-digit division approximated first by
+a 2-by-1-wide-digit division, just as we did for regular digits in long division.
+Because the actual answer we want is a 3-by-2-wide-digit division, instead of
+multiplying q̂·v directly during the fixup, we can use the quick refinement
+from long division (an n/2-by-n/2 multiply) to correct q to its actual value
+and also compute the remainder (as mentioned above), and then stop after that,
+never doing a full n-by-n multiply.
+
+Instead of using an n-by-n/2-digit division to produce n/2 digits, we can add
+(not discard) one more real digit, doing an (n+1)-by-(n/2+1)-digit division that
+produces n/2+1 digits. That single extra digit tightens the Good Guess Guarantee
+to q ≤ q̂ ≤ q+1 and lets us drop long division's special treatment of the first
+digit. These benefits are discussed more after the Good Guess Guarantee proof
+below.
+
+
+How Fast is Recursive Division?
+
+For a 2n-by-n-digit division, this algorithm runs a 4-by-2 long division over
+wide digits, producing two wide digits plus a possible leading regular digit 1,
+which can be handled without a recursive call. That is, the algorithm uses two
+full iterations, each using an n-by-n/2-digit division and an n/2-by-n/2-digit
+multiplication, along with a few n-digit additions and subtractions. The standard
+n-by-n-digit multiplication algorithm requires O(n²) time, making the overall
+algorithm require time T(n) where
+
+	T(n) = 2T(n/2) + O(n) + O(n²)
+
+which, by the Bentley-Haken-Saxe theorem, ends up reducing to T(n) = O(n²).
+This is not an improvement over regular long division.
+
+When the number of digits n becomes large enough, Karatsuba's algorithm for
+multiplication can be used instead, which takes O(n^log₂3) = O(n^1.6) time.
+(Karatsuba multiplication is implemented in func karatsuba in nat.go.)
+That makes the overall recursive division algorithm take O(n^1.6) time as well,
+which is an improvement, but again only for large enough numbers.
+
+It is not critical to make sure that every recursion does only two recursive
+calls. While in general the number of recursive calls can change the time
+analysis, in this case doing three calls does not change the analysis:
+
+	T(n) = 3T(n/2) + O(n) + O(n^log₂3)
+
+ends up being T(n) = O(n^log₂3). Because the Karatsuba multiplication taking
+time O(n^log₂3) is itself doing 3 half-sized recursions, doing three for the
+division does not hurt the asymptotic performance. Of course, it is likely
+still faster in practice to do two.
+
+
+Proof of the Good Guess Guarantee
+
+Given numbers x, y, let us break them into the quotients and remainders when
+divided by some scaling factor S, with the added constraints that the quotient
+x/y and the high part of y are both less than some limit T, and that the high
+part of y is at least half as big as T.
+
+	x₁ = ⌊x/S⌋        y₁ = ⌊y/S⌋
+	x₀ = x mod S      y₀ = y mod S
+
+	x  = x₁·S + x₀    0 ≤ x₀ < S    x/y < T
+	y  = y₁·S + y₀    0 ≤ y₀ < S    T/2 ≤ y₁ < T
+
+And consider the two truncated quotients:
+
+	q = ⌊x/y⌋
+	q̂ = ⌊x₁/y₁⌋
+
+We will prove that q ≤ q̂ ≤ q+2.
+
+The guarantee makes no real demands on the scaling factor S: it is simply the
+magnitude of the digits cut from both x and y to produce x₁ and y₁.
+The guarantee makes only limited demands on T: it must be large enough to hold
+the quotient x/y, and y₁ must have roughly the same size.
+
+To apply to the earlier discussion of 2-by-1 guesses in long division,
+we would choose:
+
+	S  = Bⁿ⁻¹
+	T  = B
+	x  = u
+	x₁ = uₙuₙ₋₁
+	x₀ = uₙ₋₂...u₀
+	y  = v
+	y₁ = vₙ₋₁
+	y₀ = vₙ₋₂...u₀
+
+These simpler variables avoid repeating those longer expressions in the proof.
+
+Note also that, by definition, truncating division ⌊x/y⌋ satisfies
+
+	x/y - 1 < ⌊x/y⌋ ≤ x/y.
+
+This fact will be used a few times in the proofs.
+
+Proof that q ≤ q̂:
+
+	q̂·y₁ = ⌊x₁/y₁⌋·y₁                      [by definition, q̂ = ⌊x₁/y₁⌋]
+	     > (x₁/y₁ - 1)·y₁                  [x₁/y₁ - 1 < ⌊x₁/y₁⌋]
+	     = x₁ - y₁                         [distribute y₁]
+
+	So q̂·y₁ > x₁ - y₁.
+	Since q̂·y₁ is an integer, q̂·y₁ ≥ x₁ - y₁ + 1.
+
+	q̂ - q = q̂ - ⌊x/y⌋                      [by definition, q = ⌊x/y⌋]
+	      ≥ q̂ - x/y                        [⌊x/y⌋ < x/y]
+	      = (1/y)·(q̂·y - x)                [factor out 1/y]
+	      ≥ (1/y)·(q̂·y₁·S - x)             [y = y₁·S + y₀ ≥ y₁·S]
+	      ≥ (1/y)·((x₁ - y₁ + 1)·S - x)    [above: q̂·y₁ ≥ x₁ - y₁ + 1]
+	      = (1/y)·(x₁·S - y₁·S + S - x)    [distribute S]
+	      = (1/y)·(S - x₀ - y₁·S)          [-x = -x₁·S - x₀]
+	      > -y₁·S / y                      [x₀ < S, so S - x₀ < 0; drop it]
+	      ≥ -1                             [y₁·S ≤ y]
+
+	So q̂ - q > -1.
+	Since q̂ - q is an integer, q̂ - q ≥ 0, or equivalently q ≤ q̂.
+
+Proof that q̂ ≤ q+2:
+
+	x₁/y₁ - x/y = x₁·S/y₁·S - x/y          [multiply left term by S/S]
+	            ≤ x/y₁·S - x/y             [x₁S ≤ x]
+	            = (x/y)·(y/y₁·S - 1)       [factor out x/y]
+	            = (x/y)·((y - y₁·S)/y₁·S)  [move -1 into y/y₁·S fraction]
+	            = (x/y)·(y₀/y₁·S)          [y - y₁·S = y₀]
+	            = (x/y)·(1/y₁)·(y₀/S)      [factor out 1/y₁]
+	            < (x/y)·(1/y₁)             [y₀ < S, so y₀/S < 1]
+	            ≤ (x/y)·(2/T)              [y₁ ≥ T/2, so 1/y₁ ≤ 2/T]
+	            < T·(2/T)                  [x/y < T]
+	            = 2                        [T·(2/T) = 2]
+
+	So x₁/y₁ - x/y < 2.
+
+	q̂ - q = ⌊x₁/y₁⌋ - q                    [by definition, q̂ = ⌊x₁/y₁⌋]
+	      = ⌊x₁/y₁⌋ - ⌊x/y⌋                [by definition, q = ⌊x/y⌋]
+	      ≤ x₁/y₁ - ⌊x/y⌋                  [⌊x₁/y₁⌋ ≤ x₁/y₁]
+	      < x₁/y₁ - (x/y - 1)              [⌊x/y⌋ > x/y - 1]
+	      = (x₁/y₁ - x/y) + 1              [regrouping]
+	      < 2 + 1                          [above: x₁/y₁ - x/y < 2]
+	      = 3
+
+	So q̂ - q < 3.
+	Since q̂ - q is an integer, q̂ - q ≤ 2.
+
+Note that when x/y < T/2, the bounds tighten to x₁/y₁ - x/y < 1 and therefore
+q̂ - q ≤ 1.
+
+Note also that in the general case 2n-by-n division where we don't know that
+x/y < T, we do know that x/y < 2T, yielding the bound q̂ - q ≤ 4. So we could
+remove the special case first step of long division as long as we allow the
+first fixup loop to run up to four times. (Using a simple comparison to decide
+whether the first digit is 0 or 1 is still more efficient, though.)
+
+Finally, note that when dividing three leading base-B digits by two (scaled),
+we have T = B² and x/y < B = T/B, a much tighter bound than x/y < T.
+This in turn yields the much tighter bound x₁/y₁ - x/y < 2/B. This means that
+⌊x₁/y₁⌋ and ⌊x/y⌋ can only differ when x/y is less than 2/B greater than an
+integer. For random x and y, the chance of this is 2/B, or, for large B,
+approximately zero. This means that after we produce the 3-by-2 guess in the
+long division algorithm, the fixup loop essentially never runs.
+
+In the recursive algorithm, the extra digit in (2·⌊n/2⌋+1)-by-(⌊n/2⌋+1)-digit
+division has exactly the same effect: the probability of needing a fixup is the
+same 2/B. Even better, we can allow the general case x/y < 2T and the fixup
+probability only grows to 4/B, still essentially zero.
+
+
+References
+
+There are no great references for implementing long division; thus this comment.
+Here are some notes about what to expect from the obvious references.
+
+Knuth Volume 2 (Seminumerical Algorithms) section 4.3.1 is the usual canonical
+reference for long division, but that entire series is highly compressed, never
+repeating a necessary fact and leaving important insights to the exercises.
+For example, no rationale whatsoever is given for the calculation that extends
+q̂ from a 2-by-1 to a 3-by-2 guess, nor why it reduces the error bound.
+The proof that the calculation even has the desired effect is left to exercises.
+The solutions to those exercises provided at the back of the book are entirely
+calculations, still with no explanation as to what is going on or how you would
+arrive at the idea of doing those exact calculations. Nowhere is it mentioned
+that this test extends the 2-by-1 guess into a 3-by-2 guess. The proof of the
+Good Guess Guarantee is only for the 2-by-1 guess and argues by contradiction,
+making it difficult to understand how modifications like adding another digit
+or adjusting the quotient range affects the overall bound.
+
+All that said, Knuth remains the canonical reference. It is dense but packed
+full of information and references, and the proofs are simpler than many other
+presentations. The proofs above are reworkings of Knuth's to remove the
+arguments by contradiction and add explanations or steps that Knuth omitted.
+But beware of errors in older printings. Take the published errata with you.
+
+Brinch Hansen's “Multiple-length Division Revisited: a Tour of the Minefield”
+starts with a blunt critique of Knuth's presentation (among others) and then
+presents a more detailed and easier to follow treatment of long division,
+including an implementation in Pascal. But the algorithm and implementation
+work entirely in terms of 3-by-2 division, which is much less useful on modern
+hardware than an algorithm using 2-by-1 division. The proofs are a bit too
+focused on digit counting and seem needlessly complex, especially compared to
+the ones given above.
+
+Burnikel and Ziegler's “Fast Recursive Division” introduced the key insight of
+implementing division by an n-digit divisor using recursive calls to division
+by an n/2-digit divisor, relying on Karatsuba multiplication to yield a
+sub-quadratic run time. However, the presentation decisions are made almost
+entirely for the purpose of simplifying the run-time analysis, rather than
+simplifying the presentation. Instead of a single algorithm that loops over
+quotient digits, the paper presents two mutually-recursive algorithms, for
+2n-by-n and 3n-by-2n. The paper also does not present any general (n+m)-by-n
+algorithm.
+
+The proofs in the paper are remarkably complex, especially considering that
+the algorithm is at its core just long division on wide digits, so that the
+usual long division proofs apply essentially unaltered.
+*/
+
+package big
+
+import "math/bits"
+
+// div returns q, r such that q = ⌊u/v⌋ and r = u%v = u - q·v.
+// It uses z and z2 as the storage for q and r.
+func (z nat) div(z2, u, v nat) (q, r nat) {
+	if len(v) == 0 {
+		panic("division by zero")
+	}
+
+	if u.cmp(v) < 0 {
+		q = z[:0]
+		r = z2.set(u)
+		return
+	}
+
+	if len(v) == 1 {
+		// Short division: long optimized for a single-word divisor.
+		// In that case, the 2-by-1 guess is all we need at each step.
+		var r2 Word
+		q, r2 = z.divW(u, v[0])
+		r = z2.setWord(r2)
+		return
+	}
+
+	q, r = z.divLarge(z2, u, v)
+	return
+}
+
+// divW returns q, r such that q = ⌊x/y⌋ and r = x%y = x - q·y.
+// It uses z as the storage for q.
+// Note that y is a single digit (Word), not a big number.
+func (z nat) divW(x nat, y Word) (q nat, r Word) {
+	m := len(x)
+	switch {
+	case y == 0:
+		panic("division by zero")
+	case y == 1:
+		q = z.set(x) // result is x
+		return
+	case m == 0:
+		q = z[:0] // result is 0
+		return
+	}
+	// m > 0
+	z = z.make(m)
+	r = divWVW(z, 0, x, y)
+	q = z.norm()
+	return
+}
+
+// modW returns x % d.
+func (x nat) modW(d Word) (r Word) {
+	// TODO(agl): we don't actually need to store the q value.
+	var q nat
+	q = q.make(len(x))
+	return divWVW(q, 0, x, d)
+}
+
+// divWVW overwrites z with ⌊x/y⌋, returning the remainder r.
+// The caller must ensure that len(z) = len(x).
+func divWVW(z []Word, xn Word, x []Word, y Word) (r Word) {
+	r = xn
+	if len(x) == 1 {
+		qq, rr := bits.Div(uint(r), uint(x[0]), uint(y))
+		z[0] = Word(qq)
+		return Word(rr)
+	}
+	rec := reciprocalWord(y)
+	for i := len(z) - 1; i >= 0; i-- {
+		z[i], r = divWW(r, x[i], y, rec)
+	}
+	return r
+}
+
+// div returns q, r such that q = ⌊uIn/vIn⌋ and r = uIn%vIn = uIn - q·vIn.
+// It uses z and u as the storage for q and r.
+// The caller must ensure that len(vIn) ≥ 2 (use divW otherwise)
+// and that len(uIn) ≥ len(vIn) (the answer is 0, uIn otherwise).
+func (z nat) divLarge(u, uIn, vIn nat) (q, r nat) {
+	n := len(vIn)
+	m := len(uIn) - n
+
+	// Scale the inputs so vIn's top bit is 1 (see “Scaling Inputs” above).
+	// vIn is treated as a read-only input (it may be in use by another
+	// goroutine), so we must make a copy.
+	// uIn is copied to u.
+	shift := nlz(vIn[n-1])
+	vp := getNat(n)
+	v := *vp
+	shlVU(v, vIn, shift)
+	u = u.make(len(uIn) + 1)
+	u[len(uIn)] = shlVU(u[0:len(uIn)], uIn, shift)
+
+	// The caller should not pass aliased z and u, since those are
+	// the two different outputs, but correct just in case.
+	if alias(z, u) {
+		z = nil
+	}
+	q = z.make(m + 1)
+
+	// Use basic or recursive long division depending on size.
+	if n < divRecursiveThreshold {
+		q.divBasic(u, v)
+	} else {
+		q.divRecursive(u, v)
+	}
+	putNat(vp)
+
+	q = q.norm()
+
+	// Undo scaling of remainder.
+	shrVU(u, u, shift)
+	r = u.norm()
+
+	return q, r
+}
+
+// divBasic implements long division as described above.
+// It overwrites q with ⌊u/v⌋ and overwrites u with the remainder r.
+// q must be large enough to hold ⌊u/v⌋.
+func (q nat) divBasic(u, v nat) {
+	n := len(v)
+	m := len(u) - n
+
+	qhatvp := getNat(n + 1)
+	qhatv := *qhatvp
+
+	// Set up for divWW below, precomputing reciprocal argument.
+	vn1 := v[n-1]
+	rec := reciprocalWord(vn1)
+
+	// Compute each digit of quotient.
+	for j := m; j >= 0; j-- {
+		// Compute the 2-by-1 guess q̂.
+		// The first iteration must invent a leading 0 for u.
+		qhat := Word(_M)
+		var ujn Word
+		if j+n < len(u) {
+			ujn = u[j+n]
+		}
+
+		// ujn ≤ vn1, or else q̂ would be more than one digit.
+		// For ujn == vn1, we set q̂ to the max digit M above.
+		// Otherwise, we compute the 2-by-1 guess.
+		if ujn != vn1 {
+			var rhat Word
+			qhat, rhat = divWW(ujn, u[j+n-1], vn1, rec)
+
+			// Refine q̂ to a 3-by-2 guess. See “Refining Guesses” above.
+			vn2 := v[n-2]
+			x1, x2 := mulWW(qhat, vn2)
+			ujn2 := u[j+n-2]
+			for greaterThan(x1, x2, rhat, ujn2) { // x1x2 > r̂ u[j+n-2]
+				qhat--
+				prevRhat := rhat
+				rhat += vn1
+				// If r̂  overflows, then
+				// r̂ u[j+n-2]v[n-1] is now definitely > x1 x2.
+				if rhat < prevRhat {
+					break
+				}
+				// TODO(rsc): No need for a full mulWW.
+				// x2 += vn2; if x2 overflows, x1++
+				x1, x2 = mulWW(qhat, vn2)
+			}
+		}
+
+		// Compute q̂·v.
+		qhatv[n] = mulAddVWW(qhatv[0:n], v, qhat, 0)
+		qhl := len(qhatv)
+		if j+qhl > len(u) && qhatv[n] == 0 {
+			qhl--
+		}
+
+		// Subtract q̂·v from the current section of u.
+		// If it underflows, q̂·v > u, which we fix up
+		// by decrementing q̂ and adding v back.
+		c := subVV(u[j:j+qhl], u[j:], qhatv)
+		if c != 0 {
+			c := addVV(u[j:j+n], u[j:], v)
+			// If n == qhl, the carry from subVV and the carry from addVV
+			// cancel out and don't affect u[j+n].
+			if n < qhl {
+				u[j+n] += c
+			}
+			qhat--
+		}
+
+		// Save quotient digit.
+		// Caller may know the top digit is zero and not leave room for it.
+		if j == m && m == len(q) && qhat == 0 {
+			continue
+		}
+		q[j] = qhat
+	}
+
+	putNat(qhatvp)
+}
+
+// greaterThan reports whether the two digit numbers x1 x2 > y1 y2.
+// TODO(rsc): In contradiction to most of this file, x1 is the high
+// digit and x2 is the low digit. This should be fixed.
+func greaterThan(x1, x2, y1, y2 Word) bool {
+	return x1 > y1 || x1 == y1 && x2 > y2
+}
+
+// divRecursiveThreshold is the number of divisor digits
+// at which point divRecursive is faster than divBasic.
+const divRecursiveThreshold = 100
+
+// divRecursive implements recursive division as described above.
+// It overwrites z with ⌊u/v⌋ and overwrites u with the remainder r.
+// z must be large enough to hold ⌊u/v⌋.
+// This function is just for allocating and freeing temporaries
+// around divRecursiveStep, the real implementation.
+func (z nat) divRecursive(u, v nat) {
+	// Recursion depth is (much) less than 2 log₂(len(v)).
+	// Allocate a slice of temporaries to be reused across recursion,
+	// plus one extra temporary not live across the recursion.
+	recDepth := 2 * bits.Len(uint(len(v)))
+	tmp := getNat(3 * len(v))
+	temps := make([]*nat, recDepth)
+
+	z.clear()
+	z.divRecursiveStep(u, v, 0, tmp, temps)
+
+	// Free temporaries.
+	for _, n := range temps {
+		if n != nil {
+			putNat(n)
+		}
+	}
+	putNat(tmp)
+}
+
+// divRecursiveStep is the actual implementation of recursive division.
+// It adds ⌊u/v⌋ to z and overwrites u with the remainder r.
+// z must be large enough to hold ⌊u/v⌋.
+// It uses temps[depth] (allocating if needed) as a temporary live across
+// the recursive call. It also uses tmp, but not live across the recursion.
+func (z nat) divRecursiveStep(u, v nat, depth int, tmp *nat, temps []*nat) {
+	// u is a subsection of the original and may have leading zeros.
+	// TODO(rsc): The v = v.norm() is useless and should be removed.
+	// We know (and require) that v's top digit is ≥ B/2.
+	u = u.norm()
+	v = v.norm()
+	if len(u) == 0 {
+		z.clear()
+		return
+	}
+
+	// Fall back to basic division if the problem is now small enough.
+	n := len(v)
+	if n < divRecursiveThreshold {
+		z.divBasic(u, v)
+		return
+	}
+
+	// Nothing to do if u is shorter than v (implies u < v).
+	m := len(u) - n
+	if m < 0 {
+		return
+	}
+
+	// We consider B digits in a row as a single wide digit.
+	// (See “Recursive Division” above.)
+	//
+	// TODO(rsc): rename B to Wide, to avoid confusion with _B,
+	// which is something entirely different.
+	// TODO(rsc): Look into whether using ⌈n/2⌉ is better than ⌊n/2⌋.
+	B := n / 2
+
+	// Allocate a nat for qhat below.
+	if temps[depth] == nil {
+		temps[depth] = getNat(n) // TODO(rsc): Can be just B+1.
+	} else {
+		*temps[depth] = temps[depth].make(B + 1)
+	}
+
+	// Compute each wide digit of the quotient.
+	//
+	// TODO(rsc): Change the loop to be
+	//	for j := (m+B-1)/B*B; j > 0; j -= B {
+	// which will make the final step a regular step, letting us
+	// delete what amounts to an extra copy of the loop body below.
+	j := m
+	for j > B {
+		// Divide u[j-B:j+n] (3 wide digits) by v (2 wide digits).
+		// First make the 2-by-1-wide-digit guess using a recursive call.
+		// Then extend the guess to the full 3-by-2 (see “Refining Guesses”).
+		//
+		// For the 2-by-1-wide-digit guess, instead of doing 2B-by-B-digit,
+		// we use a (2B+1)-by-(B+1) digit, which handles the possibility that
+		// the result has an extra leading 1 digit as well as guaranteeing
+		// that the computed q̂ will be off by at most 1 instead of 2.
+
+		// s is the number of digits to drop from the 3B- and 2B-digit chunks.
+		// We drop B-1 to be left with 2B+1 and B+1.
+		s := (B - 1)
+
+		// uu is the up-to-3B-digit section of u we are working on.
+		uu := u[j-B:]
+
+		// Compute the 2-by-1 guess q̂, leaving r̂ in uu[s:B+n].
+		qhat := *temps[depth]
+		qhat.clear()
+		qhat.divRecursiveStep(uu[s:B+n], v[s:], depth+1, tmp, temps)
+		qhat = qhat.norm()
+
+		// Extend to a 3-by-2 quotient and remainder.
+		// Because divRecursiveStep overwrote the top part of uu with
+		// the remainder r̂, the full uu already contains the equivalent
+		// of r̂·B + uₙ₋₂ from the “Refining Guesses” discussion.
+		// Subtracting q̂·vₙ₋₂ from it will compute the full-length remainder.
+		// If that subtraction underflows, q̂·v > u, which we fix up
+		// by decrementing q̂ and adding v back, same as in long division.
+
+		// TODO(rsc): Instead of subtract and fix-up, this code is computing
+		// q̂·vₙ₋₂ and decrementing q̂ until that product is ≤ u.
+		// But we can do the subtraction directly, as in the comment above
+		// and in long division, because we know that q̂ is wrong by at most one.
+		qhatv := tmp.make(3 * n)
+		qhatv.clear()
+		qhatv = qhatv.mul(qhat, v[:s])
+		for i := 0; i < 2; i++ {
+			e := qhatv.cmp(uu.norm())
+			if e <= 0 {
+				break
+			}
+			subVW(qhat, qhat, 1)
+			c := subVV(qhatv[:s], qhatv[:s], v[:s])
+			if len(qhatv) > s {
+				subVW(qhatv[s:], qhatv[s:], c)
+			}
+			addAt(uu[s:], v[s:], 0)
+		}
+		if qhatv.cmp(uu.norm()) > 0 {
+			panic("impossible")
+		}
+		c := subVV(uu[:len(qhatv)], uu[:len(qhatv)], qhatv)
+		if c > 0 {
+			subVW(uu[len(qhatv):], uu[len(qhatv):], c)
+		}
+		addAt(z, qhat, j-B)
+		j -= B
+	}
+
+	// TODO(rsc): Rewrite loop as described above and delete all this code.
+
+	// Now u < (v< 0 {
+			subVW(qhat, qhat, 1)
+			c := subVV(qhatv[:s], qhatv[:s], v[:s])
+			if len(qhatv) > s {
+				subVW(qhatv[s:], qhatv[s:], c)
+			}
+			addAt(u[s:], v[s:], 0)
+		}
+	}
+	if qhatv.cmp(u.norm()) > 0 {
+		panic("impossible")
+	}
+	c := subVV(u[0:len(qhatv)], u[0:len(qhatv)], qhatv)
+	if c > 0 {
+		c = subVW(u[len(qhatv):], u[len(qhatv):], c)
+	}
+	if c > 0 {
+		panic("impossible")
+	}
+
+	// Done!
+	addAt(z, qhat.norm(), 0)
+}
diff --git a/src/math/floor_ppc64x.s b/src/math/floor_ppc64x.s
index 29b92a62c3..584c27e28f 100644
--- a/src/math/floor_ppc64x.s
+++ b/src/math/floor_ppc64x.s
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build ppc64 || ppc64le
 // +build ppc64 ppc64le
 
 #include "textflag.h"
diff --git a/src/math/modf_ppc64x.s b/src/math/modf_ppc64x.s
index caa435eef9..1303067661 100644
--- a/src/math/modf_ppc64x.s
+++ b/src/math/modf_ppc64x.s
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build ppc64 || ppc64le
 // +build ppc64 ppc64le
 
 #include "textflag.h"
diff --git a/src/math/rand/rand.go b/src/math/rand/rand.go
index 8179d9f464..13f20ca5ef 100644
--- a/src/math/rand/rand.go
+++ b/src/math/rand/rand.go
@@ -12,9 +12,6 @@
 // The default Source is safe for concurrent use by multiple goroutines, but
 // Sources created by NewSource are not.
 //
-// Mathematical interval notation such as [0, n) is used throughout the
-// documentation for this package.
-//
 // This package's outputs might be easily predictable regardless of how it's
 // seeded. For random numbers suitable for security-sensitive work, see the
 // crypto/rand package.
@@ -106,7 +103,7 @@ func (r *Rand) Int() int {
 	return int(u << 1 >> 1) // clear sign bit if int == int32
 }
 
-// Int63n returns, as an int64, a non-negative pseudo-random number in [0,n).
+// Int63n returns, as an int64, a non-negative pseudo-random number in the half-open interval [0,n).
 // It panics if n <= 0.
 func (r *Rand) Int63n(n int64) int64 {
 	if n <= 0 {
@@ -123,7 +120,7 @@ func (r *Rand) Int63n(n int64) int64 {
 	return v % n
 }
 
-// Int31n returns, as an int32, a non-negative pseudo-random number in [0,n).
+// Int31n returns, as an int32, a non-negative pseudo-random number in the half-open interval [0,n).
 // It panics if n <= 0.
 func (r *Rand) Int31n(n int32) int32 {
 	if n <= 0 {
@@ -140,7 +137,7 @@ func (r *Rand) Int31n(n int32) int32 {
 	return v % n
 }
 
-// int31n returns, as an int32, a non-negative pseudo-random number in [0,n).
+// int31n returns, as an int32, a non-negative pseudo-random number in the half-open interval [0,n).
 // n must be > 0, but int31n does not check this; the caller must ensure it.
 // int31n exists because Int31n is inefficient, but Go 1 compatibility
 // requires that the stream of values produced by math/rand remain unchanged.
@@ -164,7 +161,7 @@ func (r *Rand) int31n(n int32) int32 {
 	return int32(prod >> 32)
 }
 
-// Intn returns, as an int, a non-negative pseudo-random number in [0,n).
+// Intn returns, as an int, a non-negative pseudo-random number in the half-open interval [0,n).
 // It panics if n <= 0.
 func (r *Rand) Intn(n int) int {
 	if n <= 0 {
@@ -176,7 +173,7 @@ func (r *Rand) Intn(n int) int {
 	return int(r.Int63n(int64(n)))
 }
 
-// Float64 returns, as a float64, a pseudo-random number in [0.0,1.0).
+// Float64 returns, as a float64, a pseudo-random number in the half-open interval [0.0,1.0).
 func (r *Rand) Float64() float64 {
 	// A clearer, simpler implementation would be:
 	//	return float64(r.Int63n(1<<53)) / (1<<53)
@@ -202,7 +199,7 @@ again:
 	return f
 }
 
-// Float32 returns, as a float32, a pseudo-random number in [0.0,1.0).
+// Float32 returns, as a float32, a pseudo-random number in the half-open interval [0.0,1.0).
 func (r *Rand) Float32() float32 {
 	// Same rationale as in Float64: we want to preserve the Go 1 value
 	// stream except we want to fix it not to return 1.0
@@ -215,7 +212,8 @@ again:
 	return f
 }
 
-// Perm returns, as a slice of n ints, a pseudo-random permutation of the integers [0,n).
+// Perm returns, as a slice of n ints, a pseudo-random permutation of the integers
+// in the half-open interval [0,n).
 func (r *Rand) Perm(n int) []int {
 	m := make([]int, n)
 	// In the following loop, the iteration when i=0 always swaps m[0] with m[0].
@@ -323,31 +321,31 @@ func Int31() int32 { return globalRand.Int31() }
 // Int returns a non-negative pseudo-random int from the default Source.
 func Int() int { return globalRand.Int() }
 
-// Int63n returns, as an int64, a non-negative pseudo-random number in [0,n)
+// Int63n returns, as an int64, a non-negative pseudo-random number in the half-open interval [0,n)
 // from the default Source.
 // It panics if n <= 0.
 func Int63n(n int64) int64 { return globalRand.Int63n(n) }
 
-// Int31n returns, as an int32, a non-negative pseudo-random number in [0,n)
+// Int31n returns, as an int32, a non-negative pseudo-random number in the half-open interval [0,n)
 // from the default Source.
 // It panics if n <= 0.
 func Int31n(n int32) int32 { return globalRand.Int31n(n) }
 
-// Intn returns, as an int, a non-negative pseudo-random number in [0,n)
+// Intn returns, as an int, a non-negative pseudo-random number in the half-open interval [0,n)
 // from the default Source.
 // It panics if n <= 0.
 func Intn(n int) int { return globalRand.Intn(n) }
 
-// Float64 returns, as a float64, a pseudo-random number in [0.0,1.0)
+// Float64 returns, as a float64, a pseudo-random number in the half-open interval [0.0,1.0)
 // from the default Source.
 func Float64() float64 { return globalRand.Float64() }
 
-// Float32 returns, as a float32, a pseudo-random number in [0.0,1.0)
+// Float32 returns, as a float32, a pseudo-random number in the half-open interval [0.0,1.0)
 // from the default Source.
 func Float32() float32 { return globalRand.Float32() }
 
-// Perm returns, as a slice of n ints, a pseudo-random permutation of the integers [0,n)
-// from the default Source.
+// Perm returns, as a slice of n ints, a pseudo-random permutation of the integers
+// in the half-open interval [0,n) from the default Source.
 func Perm(n int) []int { return globalRand.Perm(n) }
 
 // Shuffle pseudo-randomizes the order of elements using the default Source.
diff --git a/src/math/sqrt_mipsx.s b/src/math/sqrt_mipsx.s
index c619c19ec2..291d4af39c 100644
--- a/src/math/sqrt_mipsx.s
+++ b/src/math/sqrt_mipsx.s
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build mips || mipsle
 // +build mips mipsle
 
 #include "textflag.h"
diff --git a/src/math/sqrt_ppc64x.s b/src/math/sqrt_ppc64x.s
index 174b63e35a..c929da2159 100644
--- a/src/math/sqrt_ppc64x.s
+++ b/src/math/sqrt_ppc64x.s
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build ppc64 || ppc64le
 // +build ppc64 ppc64le
 
 #include "textflag.h"
diff --git a/src/math/sqrt_riscv64.s b/src/math/sqrt_riscv64.s
index f223510c42..0dbdbc99ed 100644
--- a/src/math/sqrt_riscv64.s
+++ b/src/math/sqrt_riscv64.s
@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build riscv64
-
 #include "textflag.h"
 
 // func archSqrt(x float64) float64
diff --git a/src/mime/type.go b/src/mime/type.go
index 9bbbf216a1..26424339af 100644
--- a/src/mime/type.go
+++ b/src/mime/type.go
@@ -96,9 +96,11 @@ func initMime() {
 // Extensions are looked up first case-sensitively, then case-insensitively.
 //
 // The built-in table is small but on unix it is augmented by the local
-// system's mime.types file(s) if available under one or more of these
-// names:
+// system's MIME-info database or mime.types file(s) if available under one or
+// more of these names:
 //
+//   /usr/local/share/mime/globs2
+//   /usr/share/mime/globs2
 //   /etc/mime.types
 //   /etc/apache2/mime.types
 //   /etc/apache/mime.types
diff --git a/src/net/dial_test.go b/src/net/dial_test.go
index 394bdb047e..723038c7a2 100644
--- a/src/net/dial_test.go
+++ b/src/net/dial_test.go
@@ -155,40 +155,27 @@ func slowDialTCP(ctx context.Context, network string, laddr, raddr *TCPAddr) (*T
 	return c, err
 }
 
-func dialClosedPort(t *testing.T) (actual, expected time.Duration) {
-	// Estimate the expected time for this platform.
-	// On Windows, dialing a closed port takes roughly 1 second,
-	// but other platforms should be instantaneous.
-	if runtime.GOOS == "windows" {
-		expected = 1500 * time.Millisecond
-	} else if runtime.GOOS == "darwin" || runtime.GOOS == "ios" {
-		expected = 150 * time.Millisecond
-	} else {
-		expected = 95 * time.Millisecond
-	}
+func dialClosedPort(t *testing.T) (dialLatency time.Duration) {
+	// On most platforms, dialing a closed port should be nearly instantaneous —
+	// less than a few hundred milliseconds. However, on some platforms it may be
+	// much slower: on Windows and OpenBSD, it has been observed to take up to a
+	// few seconds.
 
 	l, err := Listen("tcp", "127.0.0.1:0")
 	if err != nil {
-		t.Logf("dialClosedPort: Listen failed: %v", err)
-		return 999 * time.Hour, expected
+		t.Fatalf("dialClosedPort: Listen failed: %v", err)
 	}
 	addr := l.Addr().String()
 	l.Close()
-	// On OpenBSD, interference from TestTCPSelfConnect is mysteriously
-	// causing the first attempt to hang for a few seconds, so we throw
-	// away the first result and keep the second.
-	for i := 1; ; i++ {
-		startTime := time.Now()
-		c, err := Dial("tcp", addr)
-		if err == nil {
-			c.Close()
-		}
-		elapsed := time.Now().Sub(startTime)
-		if i == 2 {
-			t.Logf("dialClosedPort: measured delay %v", elapsed)
-			return elapsed, expected
-		}
+
+	startTime := time.Now()
+	c, err := Dial("tcp", addr)
+	if err == nil {
+		c.Close()
 	}
+	elapsed := time.Now().Sub(startTime)
+	t.Logf("dialClosedPort: measured delay %v", elapsed)
+	return elapsed
 }
 
 func TestDialParallel(t *testing.T) {
@@ -198,10 +185,7 @@ func TestDialParallel(t *testing.T) {
 		t.Skip("both IPv4 and IPv6 are required")
 	}
 
-	closedPortDelay, expectClosedPortDelay := dialClosedPort(t)
-	if closedPortDelay > expectClosedPortDelay {
-		t.Errorf("got %v; want <= %v", closedPortDelay, expectClosedPortDelay)
-	}
+	closedPortDelay := dialClosedPort(t)
 
 	const instant time.Duration = 0
 	const fallbackDelay = 200 * time.Millisecond
@@ -656,15 +640,7 @@ func TestDialerLocalAddr(t *testing.T) {
 		}
 		c, err := d.Dial(tt.network, addr)
 		if err == nil && tt.error != nil || err != nil && tt.error == nil {
-			// A suspected kernel bug in macOS 10.12 occasionally results in
-			// timeout errors when dialing address ::1. The errors have not
-			// been observed on newer versions of the OS, so we don't plan to work
-			// around them. See https://golang.org/issue/22019.
-			if tt.raddr == "::1" && os.Getenv("GO_BUILDER_NAME") == "darwin-amd64-10_12" && os.IsTimeout(err) {
-				t.Logf("ignoring timeout error on Darwin; see https://golang.org/issue/22019")
-			} else {
-				t.Errorf("%s %v->%s: got %v; want %v", tt.network, tt.laddr, tt.raddr, err, tt.error)
-			}
+			t.Errorf("%s %v->%s: got %v; want %v", tt.network, tt.laddr, tt.raddr, err, tt.error)
 		}
 		if err != nil {
 			if perr := parseDialError(err); perr != nil {
@@ -683,10 +659,7 @@ func TestDialerDualStack(t *testing.T) {
 		t.Skip("both IPv4 and IPv6 are required")
 	}
 
-	closedPortDelay, expectClosedPortDelay := dialClosedPort(t)
-	if closedPortDelay > expectClosedPortDelay {
-		t.Errorf("got %v; want <= %v", closedPortDelay, expectClosedPortDelay)
-	}
+	closedPortDelay := dialClosedPort(t)
 
 	origTestHookLookupIP := testHookLookupIP
 	defer func() { testHookLookupIP = origTestHookLookupIP }()
diff --git a/src/net/dnsclient_unix_test.go b/src/net/dnsclient_unix_test.go
index ec690a1c0c..350ad5def7 100644
--- a/src/net/dnsclient_unix_test.go
+++ b/src/net/dnsclient_unix_test.go
@@ -1799,3 +1799,325 @@ func TestPTRandNonPTR(t *testing.T) {
 		t.Errorf("names = %q; want %q", names, want)
 	}
 }
+
+func TestCVE202133195(t *testing.T) {
+	fake := fakeDNSServer{
+		rh: func(n, _ string, q dnsmessage.Message, _ time.Time) (dnsmessage.Message, error) {
+			r := dnsmessage.Message{
+				Header: dnsmessage.Header{
+					ID:                 q.Header.ID,
+					Response:           true,
+					RCode:              dnsmessage.RCodeSuccess,
+					RecursionAvailable: true,
+				},
+				Questions: q.Questions,
+			}
+			switch q.Questions[0].Type {
+			case dnsmessage.TypeCNAME:
+				r.Answers = []dnsmessage.Resource{}
+			case dnsmessage.TypeA: // CNAME lookup uses a A/AAAA as a proxy
+				r.Answers = append(r.Answers,
+					dnsmessage.Resource{
+						Header: dnsmessage.ResourceHeader{
+							Name:   dnsmessage.MustNewName(".golang.org."),
+							Type:   dnsmessage.TypeA,
+							Class:  dnsmessage.ClassINET,
+							Length: 4,
+						},
+						Body: &dnsmessage.AResource{
+							A: TestAddr,
+						},
+					},
+				)
+			case dnsmessage.TypeSRV:
+				n := q.Questions[0].Name
+				if n.String() == "_hdr._tcp.golang.org." {
+					n = dnsmessage.MustNewName(".golang.org.")
+				}
+				r.Answers = append(r.Answers,
+					dnsmessage.Resource{
+						Header: dnsmessage.ResourceHeader{
+							Name:   n,
+							Type:   dnsmessage.TypeSRV,
+							Class:  dnsmessage.ClassINET,
+							Length: 4,
+						},
+						Body: &dnsmessage.SRVResource{
+							Target: dnsmessage.MustNewName(".golang.org."),
+						},
+					},
+					dnsmessage.Resource{
+						Header: dnsmessage.ResourceHeader{
+							Name:   n,
+							Type:   dnsmessage.TypeSRV,
+							Class:  dnsmessage.ClassINET,
+							Length: 4,
+						},
+						Body: &dnsmessage.SRVResource{
+							Target: dnsmessage.MustNewName("good.golang.org."),
+						},
+					},
+				)
+			case dnsmessage.TypeMX:
+				r.Answers = append(r.Answers,
+					dnsmessage.Resource{
+						Header: dnsmessage.ResourceHeader{
+							Name:   dnsmessage.MustNewName(".golang.org."),
+							Type:   dnsmessage.TypeMX,
+							Class:  dnsmessage.ClassINET,
+							Length: 4,
+						},
+						Body: &dnsmessage.MXResource{
+							MX: dnsmessage.MustNewName(".golang.org."),
+						},
+					},
+					dnsmessage.Resource{
+						Header: dnsmessage.ResourceHeader{
+							Name:   dnsmessage.MustNewName("good.golang.org."),
+							Type:   dnsmessage.TypeMX,
+							Class:  dnsmessage.ClassINET,
+							Length: 4,
+						},
+						Body: &dnsmessage.MXResource{
+							MX: dnsmessage.MustNewName("good.golang.org."),
+						},
+					},
+				)
+			case dnsmessage.TypeNS:
+				r.Answers = append(r.Answers,
+					dnsmessage.Resource{
+						Header: dnsmessage.ResourceHeader{
+							Name:   dnsmessage.MustNewName(".golang.org."),
+							Type:   dnsmessage.TypeNS,
+							Class:  dnsmessage.ClassINET,
+							Length: 4,
+						},
+						Body: &dnsmessage.NSResource{
+							NS: dnsmessage.MustNewName(".golang.org."),
+						},
+					},
+					dnsmessage.Resource{
+						Header: dnsmessage.ResourceHeader{
+							Name:   dnsmessage.MustNewName("good.golang.org."),
+							Type:   dnsmessage.TypeNS,
+							Class:  dnsmessage.ClassINET,
+							Length: 4,
+						},
+						Body: &dnsmessage.NSResource{
+							NS: dnsmessage.MustNewName("good.golang.org."),
+						},
+					},
+				)
+			case dnsmessage.TypePTR:
+				r.Answers = append(r.Answers,
+					dnsmessage.Resource{
+						Header: dnsmessage.ResourceHeader{
+							Name:   dnsmessage.MustNewName(".golang.org."),
+							Type:   dnsmessage.TypePTR,
+							Class:  dnsmessage.ClassINET,
+							Length: 4,
+						},
+						Body: &dnsmessage.PTRResource{
+							PTR: dnsmessage.MustNewName(".golang.org."),
+						},
+					},
+					dnsmessage.Resource{
+						Header: dnsmessage.ResourceHeader{
+							Name:   dnsmessage.MustNewName("good.golang.org."),
+							Type:   dnsmessage.TypePTR,
+							Class:  dnsmessage.ClassINET,
+							Length: 4,
+						},
+						Body: &dnsmessage.PTRResource{
+							PTR: dnsmessage.MustNewName("good.golang.org."),
+						},
+					},
+				)
+			}
+			return r, nil
+		},
+	}
+
+	r := Resolver{PreferGo: true, Dial: fake.DialContext}
+	// Change the default resolver to match our manipulated resolver
+	originalDefault := DefaultResolver
+	DefaultResolver = &r
+	defer func() { DefaultResolver = originalDefault }()
+	// Redirect host file lookups.
+	defer func(orig string) { testHookHostsPath = orig }(testHookHostsPath)
+	testHookHostsPath = "testdata/hosts"
+
+	tests := []struct {
+		name string
+		f    func(*testing.T)
+	}{
+		{
+			name: "CNAME",
+			f: func(t *testing.T) {
+				expectedErr := &DNSError{Err: errMalformedDNSRecordsDetail, Name: "golang.org"}
+				_, err := r.LookupCNAME(context.Background(), "golang.org")
+				if err.Error() != expectedErr.Error() {
+					t.Fatalf("unexpected error: %s", err)
+				}
+				_, err = LookupCNAME("golang.org")
+				if err.Error() != expectedErr.Error() {
+					t.Fatalf("unexpected error: %s", err)
+				}
+			},
+		},
+		{
+			name: "SRV (bad record)",
+			f: func(t *testing.T) {
+				expected := []*SRV{
+					{
+						Target: "good.golang.org.",
+					},
+				}
+				expectedErr := &DNSError{Err: errMalformedDNSRecordsDetail, Name: "golang.org"}
+				_, records, err := r.LookupSRV(context.Background(), "target", "tcp", "golang.org")
+				if err.Error() != expectedErr.Error() {
+					t.Fatalf("unexpected error: %s", err)
+				}
+				if !reflect.DeepEqual(records, expected) {
+					t.Error("Unexpected record set")
+				}
+				_, records, err = LookupSRV("target", "tcp", "golang.org")
+				if err.Error() != expectedErr.Error() {
+					t.Errorf("unexpected error: %s", err)
+				}
+				if !reflect.DeepEqual(records, expected) {
+					t.Error("Unexpected record set")
+				}
+			},
+		},
+		{
+			name: "SRV (bad header)",
+			f: func(t *testing.T) {
+				_, _, err := r.LookupSRV(context.Background(), "hdr", "tcp", "golang.org.")
+				if expected := "lookup golang.org.: SRV header name is invalid"; err == nil || err.Error() != expected {
+					t.Errorf("Resolver.LookupSRV returned unexpected error, got %q, want %q", err, expected)
+				}
+				_, _, err = LookupSRV("hdr", "tcp", "golang.org.")
+				if expected := "lookup golang.org.: SRV header name is invalid"; err == nil || err.Error() != expected {
+					t.Errorf("LookupSRV returned unexpected error, got %q, want %q", err, expected)
+				}
+			},
+		},
+		{
+			name: "MX",
+			f: func(t *testing.T) {
+				expected := []*MX{
+					{
+						Host: "good.golang.org.",
+					},
+				}
+				expectedErr := &DNSError{Err: errMalformedDNSRecordsDetail, Name: "golang.org"}
+				records, err := r.LookupMX(context.Background(), "golang.org")
+				if err.Error() != expectedErr.Error() {
+					t.Fatalf("unexpected error: %s", err)
+				}
+				if !reflect.DeepEqual(records, expected) {
+					t.Error("Unexpected record set")
+				}
+				records, err = LookupMX("golang.org")
+				if err.Error() != expectedErr.Error() {
+					t.Fatalf("unexpected error: %s", err)
+				}
+				if !reflect.DeepEqual(records, expected) {
+					t.Error("Unexpected record set")
+				}
+			},
+		},
+		{
+			name: "NS",
+			f: func(t *testing.T) {
+				expected := []*NS{
+					{
+						Host: "good.golang.org.",
+					},
+				}
+				expectedErr := &DNSError{Err: errMalformedDNSRecordsDetail, Name: "golang.org"}
+				records, err := r.LookupNS(context.Background(), "golang.org")
+				if err.Error() != expectedErr.Error() {
+					t.Fatalf("unexpected error: %s", err)
+				}
+				if !reflect.DeepEqual(records, expected) {
+					t.Error("Unexpected record set")
+				}
+				records, err = LookupNS("golang.org")
+				if err.Error() != expectedErr.Error() {
+					t.Fatalf("unexpected error: %s", err)
+				}
+				if !reflect.DeepEqual(records, expected) {
+					t.Error("Unexpected record set")
+				}
+			},
+		},
+		{
+			name: "Addr",
+			f: func(t *testing.T) {
+				expected := []string{"good.golang.org."}
+				expectedErr := &DNSError{Err: errMalformedDNSRecordsDetail, Name: "192.0.2.42"}
+				records, err := r.LookupAddr(context.Background(), "192.0.2.42")
+				if err.Error() != expectedErr.Error() {
+					t.Fatalf("unexpected error: %s", err)
+				}
+				if !reflect.DeepEqual(records, expected) {
+					t.Error("Unexpected record set")
+				}
+				records, err = LookupAddr("192.0.2.42")
+				if err.Error() != expectedErr.Error() {
+					t.Fatalf("unexpected error: %s", err)
+				}
+				if !reflect.DeepEqual(records, expected) {
+					t.Error("Unexpected record set")
+				}
+			},
+		},
+	}
+
+	for _, tc := range tests {
+		t.Run(tc.name, tc.f)
+	}
+
+}
+
+func TestNullMX(t *testing.T) {
+	fake := fakeDNSServer{
+		rh: func(n, _ string, q dnsmessage.Message, _ time.Time) (dnsmessage.Message, error) {
+			r := dnsmessage.Message{
+				Header: dnsmessage.Header{
+					ID:       q.Header.ID,
+					Response: true,
+					RCode:    dnsmessage.RCodeSuccess,
+				},
+				Questions: q.Questions,
+				Answers: []dnsmessage.Resource{
+					{
+						Header: dnsmessage.ResourceHeader{
+							Name:  q.Questions[0].Name,
+							Type:  dnsmessage.TypeMX,
+							Class: dnsmessage.ClassINET,
+						},
+						Body: &dnsmessage.MXResource{
+							MX: dnsmessage.MustNewName("."),
+						},
+					},
+				},
+			}
+			return r, nil
+		},
+	}
+	r := Resolver{PreferGo: true, Dial: fake.DialContext}
+	rrset, err := r.LookupMX(context.Background(), "golang.org")
+	if err != nil {
+		t.Fatalf("LookupMX: %v", err)
+	}
+	if want := []*MX{&MX{Host: "."}}; !reflect.DeepEqual(rrset, want) {
+		records := []string{}
+		for _, rr := range rrset {
+			records = append(records, fmt.Sprintf("%v", rr))
+		}
+		t.Errorf("records = [%v]; want [%v]", strings.Join(records, " "), want[0])
+	}
+}
diff --git a/src/net/hosts_test.go b/src/net/hosts_test.go
index f850e2fccf..19c43999f9 100644
--- a/src/net/hosts_test.go
+++ b/src/net/hosts_test.go
@@ -36,7 +36,7 @@ var lookupStaticHostTests = []struct {
 		},
 	},
 	{
-		"testdata/ipv4-hosts", // see golang.org/issue/8996
+		"testdata/ipv4-hosts",
 		[]staticHostEntry{
 			{"localhost", []string{"127.0.0.1", "127.0.0.2", "127.0.0.3"}},
 			{"localhost.localdomain", []string{"127.0.0.3"}},
@@ -102,7 +102,7 @@ var lookupStaticAddrTests = []struct {
 		},
 	},
 	{
-		"testdata/ipv4-hosts", // see golang.org/issue/8996
+		"testdata/ipv4-hosts",
 		[]staticHostEntry{
 			{"127.0.0.1", []string{"localhost"}},
 			{"127.0.0.2", []string{"localhost"}},
diff --git a/src/net/http/client.go b/src/net/http/client.go
index 82e665829e..4d380c65db 100644
--- a/src/net/http/client.go
+++ b/src/net/http/client.go
@@ -17,6 +17,7 @@ import (
 	"fmt"
 	"io"
 	"log"
+	"net/http/internal/ascii"
 	"net/url"
 	"reflect"
 	"sort"
@@ -432,8 +433,7 @@ func basicAuth(username, password string) string {
 // An error is returned if there were too many redirects or if there
 // was an HTTP protocol error. A non-2xx response doesn't cause an
 // error. Any returned error will be of type *url.Error. The url.Error
-// value's Timeout method will report true if request timed out or was
-// canceled.
+// value's Timeout method will report true if the request timed out.
 //
 // When err is nil, resp always contains a non-nil resp.Body.
 // Caller should close resp.Body when done reading from it.
@@ -547,7 +547,10 @@ func urlErrorOp(method string) string {
 	if method == "" {
 		return "Get"
 	}
-	return method[:1] + strings.ToLower(method[1:])
+	if lowerMethod, ok := ascii.ToLower(method); ok {
+		return method[:1] + lowerMethod[1:]
+	}
+	return method
 }
 
 // Do sends an HTTP request and returns an HTTP response, following
@@ -585,8 +588,7 @@ func urlErrorOp(method string) string {
 // standard library body types.
 //
 // Any returned error will be of type *url.Error. The url.Error
-// value's Timeout method will report true if request timed out or was
-// canceled.
+// value's Timeout method will report true if the request timed out.
 func (c *Client) Do(req *Request) (*Response, error) {
 	return c.do(req)
 }
@@ -725,7 +727,6 @@ func (c *Client) do(req *Request) (retres *Response, reterr error) {
 			reqBodyClosed = true
 			if !deadline.IsZero() && didTimeout() {
 				err = &httpError{
-					// TODO: early in cycle: s/Client.Timeout exceeded/timeout or context cancellation/
 					err:     err.Error() + " (Client.Timeout exceeded while awaiting headers)",
 					timeout: true,
 				}
@@ -950,7 +951,7 @@ func (c *Client) CloseIdleConnections() {
 }
 
 // cancelTimerBody is an io.ReadCloser that wraps rc with two features:
-// 1) on Read error or close, the stop func is called.
+// 1) On Read error or close, the stop func is called.
 // 2) On Read failure, if reqDidTimeout is true, the error is wrapped and
 //    marked as net.Error that hit its timeout.
 type cancelTimerBody struct {
diff --git a/src/net/http/cookie.go b/src/net/http/cookie.go
index 141bc947f6..ca2c1c2506 100644
--- a/src/net/http/cookie.go
+++ b/src/net/http/cookie.go
@@ -7,6 +7,7 @@ package http
 import (
 	"log"
 	"net"
+	"net/http/internal/ascii"
 	"net/textproto"
 	"strconv"
 	"strings"
@@ -93,15 +94,23 @@ func readSetCookies(h Header) []*Cookie {
 			if j := strings.Index(attr, "="); j >= 0 {
 				attr, val = attr[:j], attr[j+1:]
 			}
-			lowerAttr := strings.ToLower(attr)
+			lowerAttr, isASCII := ascii.ToLower(attr)
+			if !isASCII {
+				continue
+			}
 			val, ok = parseCookieValue(val, false)
 			if !ok {
 				c.Unparsed = append(c.Unparsed, parts[i])
 				continue
 			}
+
 			switch lowerAttr {
 			case "samesite":
-				lowerVal := strings.ToLower(val)
+				lowerVal, ascii := ascii.ToLower(val)
+				if !ascii {
+					c.SameSite = SameSiteDefaultMode
+					continue
+				}
 				switch lowerVal {
 				case "lax":
 					c.SameSite = SameSiteLaxMode
diff --git a/src/net/http/cookiejar/jar.go b/src/net/http/cookiejar/jar.go
index 9f19917084..e6583da7fe 100644
--- a/src/net/http/cookiejar/jar.go
+++ b/src/net/http/cookiejar/jar.go
@@ -10,6 +10,7 @@ import (
 	"fmt"
 	"net"
 	"net/http"
+	"net/http/internal/ascii"
 	"net/url"
 	"sort"
 	"strings"
@@ -296,7 +297,6 @@ func (j *Jar) setCookies(u *url.URL, cookies []*http.Cookie, now time.Time) {
 // host name.
 func canonicalHost(host string) (string, error) {
 	var err error
-	host = strings.ToLower(host)
 	if hasPort(host) {
 		host, _, err = net.SplitHostPort(host)
 		if err != nil {
@@ -307,7 +307,13 @@ func canonicalHost(host string) (string, error) {
 		// Strip trailing dot from fully qualified domain names.
 		host = host[:len(host)-1]
 	}
-	return toASCII(host)
+	encoded, err := toASCII(host)
+	if err != nil {
+		return "", err
+	}
+	// We know this is ascii, no need to check.
+	lower, _ := ascii.ToLower(encoded)
+	return lower, nil
 }
 
 // hasPort reports whether host contains a port number. host may be a host
@@ -469,7 +475,12 @@ func (j *Jar) domainAndType(host, domain string) (string, bool, error) {
 		// both are illegal.
 		return "", false, errMalformedDomain
 	}
-	domain = strings.ToLower(domain)
+
+	domain, isASCII := ascii.ToLower(domain)
+	if !isASCII {
+		// Received non-ASCII domain, e.g. "perché.com" instead of "xn--perch-fsa.com"
+		return "", false, errMalformedDomain
+	}
 
 	if domain[len(domain)-1] == '.' {
 		// We received stuff like "Domain=www.example.com.".
diff --git a/src/net/http/cookiejar/punycode.go b/src/net/http/cookiejar/punycode.go
index a9cc666e8c..c7f438dd00 100644
--- a/src/net/http/cookiejar/punycode.go
+++ b/src/net/http/cookiejar/punycode.go
@@ -8,6 +8,7 @@ package cookiejar
 
 import (
 	"fmt"
+	"net/http/internal/ascii"
 	"strings"
 	"unicode/utf8"
 )
@@ -133,12 +134,12 @@ const acePrefix = "xn--"
 // toASCII("bücher.example.com") is "xn--bcher-kva.example.com", and
 // toASCII("golang") is "golang".
 func toASCII(s string) (string, error) {
-	if ascii(s) {
+	if ascii.Is(s) {
 		return s, nil
 	}
 	labels := strings.Split(s, ".")
 	for i, label := range labels {
-		if !ascii(label) {
+		if !ascii.Is(label) {
 			a, err := encode(acePrefix, label)
 			if err != nil {
 				return "", err
@@ -148,12 +149,3 @@ func toASCII(s string) (string, error) {
 	}
 	return strings.Join(labels, "."), nil
 }
-
-func ascii(s string) bool {
-	for i := 0; i < len(s); i++ {
-		if s[i] >= utf8.RuneSelf {
-			return false
-		}
-	}
-	return true
-}
diff --git a/src/net/http/h2_bundle.go b/src/net/http/h2_bundle.go
index fd540ff255..a948ff3eed 100644
--- a/src/net/http/h2_bundle.go
+++ b/src/net/http/h2_bundle.go
@@ -53,6 +53,48 @@ import (
 	"golang.org/x/net/idna"
 )
 
+// asciiEqualFold is strings.EqualFold, ASCII only. It reports whether s and t
+// are equal, ASCII-case-insensitively.
+func http2asciiEqualFold(s, t string) bool {
+	if len(s) != len(t) {
+		return false
+	}
+	for i := 0; i < len(s); i++ {
+		if http2lower(s[i]) != http2lower(t[i]) {
+			return false
+		}
+	}
+	return true
+}
+
+// lower returns the ASCII lowercase version of b.
+func http2lower(b byte) byte {
+	if 'A' <= b && b <= 'Z' {
+		return b + ('a' - 'A')
+	}
+	return b
+}
+
+// isASCIIPrint returns whether s is ASCII and printable according to
+// https://tools.ietf.org/html/rfc20#section-4.2.
+func http2isASCIIPrint(s string) bool {
+	for i := 0; i < len(s); i++ {
+		if s[i] < ' ' || s[i] > '~' {
+			return false
+		}
+	}
+	return true
+}
+
+// asciiToLower returns the lowercase version of s if s is ASCII and printable,
+// and whether or not it was.
+func http2asciiToLower(s string) (lower string, ok bool) {
+	if !http2isASCIIPrint(s) {
+		return "", false
+	}
+	return strings.ToLower(s), true
+}
+
 // A list of the possible cipher suite ids. Taken from
 // https://www.iana.org/assignments/tls-parameters/tls-parameters.txt
 
@@ -2907,6 +2949,20 @@ func http2traceGot1xxResponseFunc(trace *httptrace.ClientTrace) func(int, textpr
 	return nil
 }
 
+// dialTLSWithContext uses tls.Dialer, added in Go 1.15, to open a TLS
+// connection.
+func (t *http2Transport) dialTLSWithContext(ctx context.Context, network, addr string, cfg *tls.Config) (*tls.Conn, error) {
+	dialer := &tls.Dialer{
+		Config: cfg,
+	}
+	cn, err := dialer.DialContext(ctx, network, addr)
+	if err != nil {
+		return nil, err
+	}
+	tlsCn := cn.(*tls.Conn) // DialContext comment promises this will always succeed
+	return tlsCn, nil
+}
+
 var http2DebugGoroutines = os.Getenv("DEBUG_HTTP2_GOROUTINES") == "1"
 
 type http2goroutineLock uint64
@@ -3128,12 +3184,12 @@ func http2buildCommonHeaderMaps() {
 	}
 }
 
-func http2lowerHeader(v string) string {
+func http2lowerHeader(v string) (lower string, ascii bool) {
 	http2buildCommonHeaderMapsOnce()
 	if s, ok := http2commonLowerHeader[v]; ok {
-		return s
+		return s, true
 	}
-	return strings.ToLower(v)
+	return http2asciiToLower(v)
 }
 
 var (
@@ -3831,13 +3887,12 @@ func http2ConfigureServer(s *Server, conf *http2Server) error {
 
 	if s.TLSConfig == nil {
 		s.TLSConfig = new(tls.Config)
-	} else if s.TLSConfig.CipherSuites != nil {
-		// If they already provided a CipherSuite list, return
-		// an error if it has a bad order or is missing
-		// ECDHE_RSA_WITH_AES_128_GCM_SHA256 or ECDHE_ECDSA_WITH_AES_128_GCM_SHA256.
+	} else if s.TLSConfig.CipherSuites != nil && s.TLSConfig.MinVersion < tls.VersionTLS13 {
+		// If they already provided a TLS 1.0–1.2 CipherSuite list, return an
+		// error if it is missing ECDHE_RSA_WITH_AES_128_GCM_SHA256 or
+		// ECDHE_ECDSA_WITH_AES_128_GCM_SHA256.
 		haveRequired := false
-		sawBad := false
-		for i, cs := range s.TLSConfig.CipherSuites {
+		for _, cs := range s.TLSConfig.CipherSuites {
 			switch cs {
 			case tls.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
 				// Alternative MTI cipher to not discourage ECDSA-only servers.
@@ -3845,14 +3900,9 @@ func http2ConfigureServer(s *Server, conf *http2Server) error {
 				tls.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256:
 				haveRequired = true
 			}
-			if http2isBadCipher(cs) {
-				sawBad = true
-			} else if sawBad {
-				return fmt.Errorf("http2: TLSConfig.CipherSuites index %d contains an HTTP/2-approved cipher suite (%#04x), but it comes after unapproved cipher suites. With this configuration, clients that don't support previous, approved cipher suites may be given an unapproved one and reject the connection.", i, cs)
-			}
 		}
 		if !haveRequired {
-			return fmt.Errorf("http2: TLSConfig.CipherSuites is missing an HTTP/2-required AES_128_GCM_SHA256 cipher (need at least one of TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 or TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256).")
+			return fmt.Errorf("http2: TLSConfig.CipherSuites is missing an HTTP/2-required AES_128_GCM_SHA256 cipher (need at least one of TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 or TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256)")
 		}
 	}
 
@@ -6394,8 +6444,12 @@ func (w *http2responseWriter) Push(target string, opts *PushOptions) error {
 		// but PUSH_PROMISE requests cannot have a body.
 		// http://tools.ietf.org/html/rfc7540#section-8.2
 		// Also disallow Host, since the promised URL must be absolute.
-		switch strings.ToLower(k) {
-		case "content-length", "content-encoding", "trailer", "te", "expect", "host":
+		if http2asciiEqualFold(k, "content-length") ||
+			http2asciiEqualFold(k, "content-encoding") ||
+			http2asciiEqualFold(k, "trailer") ||
+			http2asciiEqualFold(k, "te") ||
+			http2asciiEqualFold(k, "expect") ||
+			http2asciiEqualFold(k, "host") {
 			return fmt.Errorf("promised request headers cannot include %q", k)
 		}
 	}
@@ -7148,14 +7202,10 @@ func (t *http2Transport) dialTLS(ctx context.Context) func(string, string, *tls.
 		return t.DialTLS
 	}
 	return func(network, addr string, cfg *tls.Config) (net.Conn, error) {
-		dialer := &tls.Dialer{
-			Config: cfg,
-		}
-		cn, err := dialer.DialContext(ctx, network, addr)
+		tlsCn, err := t.dialTLSWithContext(ctx, network, addr, cfg)
 		if err != nil {
 			return nil, err
 		}
-		tlsCn := cn.(*tls.Conn) // DialContext comment promises this will always succeed
 		state := tlsCn.ConnectionState()
 		if p := state.NegotiatedProtocol; p != http2NextProtoTLS {
 			return nil, fmt.Errorf("http2: unexpected ALPN protocol %q; want %q", p, http2NextProtoTLS)
@@ -7163,7 +7213,7 @@ func (t *http2Transport) dialTLS(ctx context.Context) func(string, string, *tls.
 		if !state.NegotiatedProtocolIsMutual {
 			return nil, errors.New("http2: could not negotiate protocol mutually")
 		}
-		return cn, nil
+		return tlsCn, nil
 	}
 }
 
@@ -7552,7 +7602,7 @@ func http2checkConnHeaders(req *Request) error {
 	if vv := req.Header["Transfer-Encoding"]; len(vv) > 0 && (len(vv) > 1 || vv[0] != "" && vv[0] != "chunked") {
 		return fmt.Errorf("http2: invalid Transfer-Encoding request header: %q", vv)
 	}
-	if vv := req.Header["Connection"]; len(vv) > 0 && (len(vv) > 1 || vv[0] != "" && !strings.EqualFold(vv[0], "close") && !strings.EqualFold(vv[0], "keep-alive")) {
+	if vv := req.Header["Connection"]; len(vv) > 0 && (len(vv) > 1 || vv[0] != "" && !http2asciiEqualFold(vv[0], "close") && !http2asciiEqualFold(vv[0], "keep-alive")) {
 		return fmt.Errorf("http2: invalid Connection request header: %q", vv)
 	}
 	return nil
@@ -8078,19 +8128,21 @@ func (cc *http2ClientConn) encodeHeaders(req *Request, addGzipHeader bool, trail
 
 		var didUA bool
 		for k, vv := range req.Header {
-			if strings.EqualFold(k, "host") || strings.EqualFold(k, "content-length") {
+			if http2asciiEqualFold(k, "host") || http2asciiEqualFold(k, "content-length") {
 				// Host is :authority, already sent.
 				// Content-Length is automatic, set below.
 				continue
-			} else if strings.EqualFold(k, "connection") || strings.EqualFold(k, "proxy-connection") ||
-				strings.EqualFold(k, "transfer-encoding") || strings.EqualFold(k, "upgrade") ||
-				strings.EqualFold(k, "keep-alive") {
+			} else if http2asciiEqualFold(k, "connection") ||
+				http2asciiEqualFold(k, "proxy-connection") ||
+				http2asciiEqualFold(k, "transfer-encoding") ||
+				http2asciiEqualFold(k, "upgrade") ||
+				http2asciiEqualFold(k, "keep-alive") {
 				// Per 8.1.2.2 Connection-Specific Header
 				// Fields, don't send connection-specific
 				// fields. We have already checked if any
 				// are error-worthy so just ignore the rest.
 				continue
-			} else if strings.EqualFold(k, "user-agent") {
+			} else if http2asciiEqualFold(k, "user-agent") {
 				// Match Go's http1 behavior: at most one
 				// User-Agent. If set to nil or empty string,
 				// then omit it. Otherwise if not mentioned,
@@ -8103,7 +8155,7 @@ func (cc *http2ClientConn) encodeHeaders(req *Request, addGzipHeader bool, trail
 				if vv[0] == "" {
 					continue
 				}
-			} else if strings.EqualFold(k, "cookie") {
+			} else if http2asciiEqualFold(k, "cookie") {
 				// Per 8.1.2.5 To allow for better compression efficiency, the
 				// Cookie header field MAY be split into separate header fields,
 				// each with one or more cookie-pairs.
@@ -8162,7 +8214,12 @@ func (cc *http2ClientConn) encodeHeaders(req *Request, addGzipHeader bool, trail
 
 	// Header list size is ok. Write the headers.
 	enumerateHeaders(func(name, value string) {
-		name = strings.ToLower(name)
+		name, ascii := http2asciiToLower(name)
+		if !ascii {
+			// Skip writing invalid headers. Per RFC 7540, Section 8.1.2, header
+			// field names have to be ASCII characters (just as in HTTP/1.x).
+			return
+		}
 		cc.writeHeader(name, value)
 		if traceHeaders {
 			http2traceWroteHeaderField(trace, name, value)
@@ -8210,9 +8267,14 @@ func (cc *http2ClientConn) encodeTrailers(req *Request) ([]byte, error) {
 	}
 
 	for k, vv := range req.Trailer {
+		lowKey, ascii := http2asciiToLower(k)
+		if !ascii {
+			// Skip writing invalid headers. Per RFC 7540, Section 8.1.2, header
+			// field names have to be ASCII characters (just as in HTTP/1.x).
+			continue
+		}
 		// Transfer-Encoding, etc.. have already been filtered at the
 		// start of RoundTrip
-		lowKey := strings.ToLower(k)
 		for _, v := range vv {
 			cc.writeHeader(lowKey, v)
 		}
@@ -9635,7 +9697,12 @@ func http2encodeHeaders(enc *hpack.Encoder, h Header, keys []string) {
 	}
 	for _, k := range keys {
 		vv := h[k]
-		k = http2lowerHeader(k)
+		k, ascii := http2lowerHeader(k)
+		if !ascii {
+			// Skip writing invalid headers. Per RFC 7540, Section 8.1.2, header
+			// field names have to be ASCII characters (just as in HTTP/1.x).
+			continue
+		}
 		if !http2validWireHeaderFieldName(k) {
 			// Skip it as backup paranoia. Per
 			// golang.org/issue/14048, these should
diff --git a/src/net/http/header.go b/src/net/http/header.go
index b9b53911f3..4c72dcb2c8 100644
--- a/src/net/http/header.go
+++ b/src/net/http/header.go
@@ -7,6 +7,7 @@ package http
 import (
 	"io"
 	"net/http/httptrace"
+	"net/http/internal/ascii"
 	"net/textproto"
 	"sort"
 	"strings"
@@ -251,7 +252,7 @@ func hasToken(v, token string) bool {
 		if endPos := sp + len(token); endPos != len(v) && !isTokenBoundary(v[endPos]) {
 			continue
 		}
-		if strings.EqualFold(v[sp:sp+len(token)], token) {
+		if ascii.EqualFold(v[sp:sp+len(token)], token) {
 			return true
 		}
 	}
diff --git a/src/net/http/http.go b/src/net/http/http.go
index 4c5054b399..101799f574 100644
--- a/src/net/http/http.go
+++ b/src/net/http/http.go
@@ -62,15 +62,6 @@ func isNotToken(r rune) bool {
 	return !httpguts.IsTokenRune(r)
 }
 
-func isASCII(s string) bool {
-	for i := 0; i < len(s); i++ {
-		if s[i] >= utf8.RuneSelf {
-			return false
-		}
-	}
-	return true
-}
-
 // stringContainsCTLByte reports whether s contains any ASCII control character.
 func stringContainsCTLByte(s string) bool {
 	for i := 0; i < len(s); i++ {
diff --git a/src/net/http/http_test.go b/src/net/http/http_test.go
index 3f1d7cee71..0d92fe5f96 100644
--- a/src/net/http/http_test.go
+++ b/src/net/http/http_test.go
@@ -9,9 +9,13 @@ package http
 import (
 	"bytes"
 	"internal/testenv"
+	"io/fs"
 	"net/url"
+	"os"
 	"os/exec"
 	"reflect"
+	"regexp"
+	"strings"
 	"testing"
 )
 
@@ -156,3 +160,61 @@ func BenchmarkCopyValues(b *testing.B) {
 		b.Fatal("Benchmark wasn't run")
 	}
 }
+
+var forbiddenStringsFunctions = map[string]bool{
+	// Functions that use Unicode-aware case folding.
+	"EqualFold":      true,
+	"Title":          true,
+	"ToLower":        true,
+	"ToLowerSpecial": true,
+	"ToTitle":        true,
+	"ToTitleSpecial": true,
+	"ToUpper":        true,
+	"ToUpperSpecial": true,
+
+	// Functions that use Unicode-aware spaces.
+	"Fields":    true,
+	"TrimSpace": true,
+}
+
+// TestNoUnicodeStrings checks that nothing in net/http uses the Unicode-aware
+// strings and bytes package functions. HTTP is mostly ASCII based, and doing
+// Unicode-aware case folding or space stripping can introduce vulnerabilities.
+func TestNoUnicodeStrings(t *testing.T) {
+	if !testenv.HasSrc() {
+		t.Skip("source code not available")
+	}
+
+	re := regexp.MustCompile(`(strings|bytes).([A-Za-z]+)`)
+	if err := fs.WalkDir(os.DirFS("."), ".", func(path string, d fs.DirEntry, err error) error {
+		if err != nil {
+			t.Fatal(err)
+		}
+
+		if path == "internal/ascii" {
+			return fs.SkipDir
+		}
+		if !strings.HasSuffix(path, ".go") ||
+			strings.HasSuffix(path, "_test.go") ||
+			path == "h2_bundle.go" || d.IsDir() {
+			return nil
+		}
+
+		contents, err := os.ReadFile(path)
+		if err != nil {
+			t.Fatal(err)
+		}
+		for lineNum, line := range strings.Split(string(contents), "\n") {
+			for _, match := range re.FindAllStringSubmatch(line, -1) {
+				if !forbiddenStringsFunctions[match[2]] {
+					continue
+				}
+				t.Errorf("disallowed call to %s at %s:%d", match[0], path, lineNum+1)
+			}
+		}
+
+		return nil
+	}); err != nil {
+		t.Fatal(err)
+	}
+}
diff --git a/src/net/http/httptest/server.go b/src/net/http/httptest/server.go
index a02a6d64c3..4f85ff55d8 100644
--- a/src/net/http/httptest/server.go
+++ b/src/net/http/httptest/server.go
@@ -14,7 +14,7 @@ import (
 	"log"
 	"net"
 	"net/http"
-	"net/http/internal"
+	"net/http/internal/testcert"
 	"os"
 	"strings"
 	"sync"
@@ -144,7 +144,7 @@ func (s *Server) StartTLS() {
 	if s.client == nil {
 		s.client = &http.Client{Transport: &http.Transport{}}
 	}
-	cert, err := tls.X509KeyPair(internal.LocalhostCert, internal.LocalhostKey)
+	cert, err := tls.X509KeyPair(testcert.LocalhostCert, testcert.LocalhostKey)
 	if err != nil {
 		panic(fmt.Sprintf("httptest: NewTLSServer: %v", err))
 	}
diff --git a/src/net/http/httputil/reverseproxy.go b/src/net/http/httputil/reverseproxy.go
index db42ac6ba5..8b63368386 100644
--- a/src/net/http/httputil/reverseproxy.go
+++ b/src/net/http/httputil/reverseproxy.go
@@ -13,6 +13,7 @@ import (
 	"log"
 	"net"
 	"net/http"
+	"net/http/internal/ascii"
 	"net/textproto"
 	"net/url"
 	"strings"
@@ -234,6 +235,15 @@ func (p *ReverseProxy) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
 	if req.ContentLength == 0 {
 		outreq.Body = nil // Issue 16036: nil Body for http.Transport retries
 	}
+	if outreq.Body != nil {
+		// Reading from the request body after returning from a handler is not
+		// allowed, and the RoundTrip goroutine that reads the Body can outlive
+		// this handler. This can lead to a crash if the handler panics (see
+		// Issue 46866). Although calling Close doesn't guarantee there isn't
+		// any Read in flight after the handle returns, in practice it's safe to
+		// read after closing it.
+		defer outreq.Body.Close()
+	}
 	if outreq.Header == nil {
 		outreq.Header = make(http.Header) // Issue 33142: historical behavior was to always allocate
 	}
@@ -242,28 +252,28 @@ func (p *ReverseProxy) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
 	outreq.Close = false
 
 	reqUpType := upgradeType(outreq.Header)
+	if !ascii.IsPrint(reqUpType) {
+		p.getErrorHandler()(rw, req, fmt.Errorf("client tried to switch to invalid protocol %q", reqUpType))
+		return
+	}
 	removeConnectionHeaders(outreq.Header)
 
 	// Remove hop-by-hop headers to the backend. Especially
 	// important is "Connection" because we want a persistent
 	// connection, regardless of what the client sent to us.
 	for _, h := range hopHeaders {
-		hv := outreq.Header.Get(h)
-		if hv == "" {
-			continue
-		}
-		if h == "Te" && hv == "trailers" {
-			// Issue 21096: tell backend applications that
-			// care about trailer support that we support
-			// trailers. (We do, but we don't go out of
-			// our way to advertise that unless the
-			// incoming client request thought it was
-			// worth mentioning)
-			continue
-		}
 		outreq.Header.Del(h)
 	}
 
+	// Issue 21096: tell backend applications that care about trailer support
+	// that we support trailers. (We do, but we don't go out of our way to
+	// advertise that unless the incoming client request thought it was worth
+	// mentioning.) Note that we look at req.Header, not outreq.Header, since
+	// the latter has passed through removeConnectionHeaders.
+	if httpguts.HeaderValuesContainsToken(req.Header["Te"], "trailers") {
+		outreq.Header.Set("Te", "trailers")
+	}
+
 	// After stripping all the hop-by-hop connection headers above, add back any
 	// necessary for protocol upgrades, such as for websockets.
 	if reqUpType != "" {
@@ -538,13 +548,16 @@ func upgradeType(h http.Header) string {
 	if !httpguts.HeaderValuesContainsToken(h["Connection"], "Upgrade") {
 		return ""
 	}
-	return strings.ToLower(h.Get("Upgrade"))
+	return h.Get("Upgrade")
 }
 
 func (p *ReverseProxy) handleUpgradeResponse(rw http.ResponseWriter, req *http.Request, res *http.Response) {
 	reqUpType := upgradeType(req.Header)
 	resUpType := upgradeType(res.Header)
-	if reqUpType != resUpType {
+	if !ascii.IsPrint(resUpType) { // We know reqUpType is ASCII, it's checked by the caller.
+		p.getErrorHandler()(rw, req, fmt.Errorf("backend tried to switch to invalid protocol %q", resUpType))
+	}
+	if !ascii.EqualFold(reqUpType, resUpType) {
 		p.getErrorHandler()(rw, req, fmt.Errorf("backend tried to switch protocol %q when %q was requested", resUpType, reqUpType))
 		return
 	}
diff --git a/src/net/http/httputil/reverseproxy_test.go b/src/net/http/httputil/reverseproxy_test.go
index 3acbd940e4..4b6ad77a29 100644
--- a/src/net/http/httputil/reverseproxy_test.go
+++ b/src/net/http/httputil/reverseproxy_test.go
@@ -16,6 +16,7 @@ import (
 	"log"
 	"net/http"
 	"net/http/httptest"
+	"net/http/internal/ascii"
 	"net/url"
 	"os"
 	"reflect"
@@ -90,8 +91,9 @@ func TestReverseProxy(t *testing.T) {
 
 	getReq, _ := http.NewRequest("GET", frontend.URL, nil)
 	getReq.Host = "some-name"
-	getReq.Header.Set("Connection", "close")
-	getReq.Header.Set("Te", "trailers")
+	getReq.Header.Set("Connection", "close, TE")
+	getReq.Header.Add("Te", "foo")
+	getReq.Header.Add("Te", "bar, trailers")
 	getReq.Header.Set("Proxy-Connection", "should be deleted")
 	getReq.Header.Set("Upgrade", "foo")
 	getReq.Close = true
@@ -235,6 +237,64 @@ func TestReverseProxyStripHeadersPresentInConnection(t *testing.T) {
 	}
 }
 
+func TestReverseProxyStripEmptyConnection(t *testing.T) {
+	// See Issue 46313.
+	const backendResponse = "I am the backend"
+
+	// someConnHeader is some arbitrary header to be declared as a hop-by-hop header
+	// in the Request's Connection header.
+	const someConnHeader = "X-Some-Conn-Header"
+
+	backend := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if c := r.Header.Values("Connection"); len(c) != 0 {
+			t.Errorf("handler got header %q = %v; want empty", "Connection", c)
+		}
+		if c := r.Header.Get(someConnHeader); c != "" {
+			t.Errorf("handler got header %q = %q; want empty", someConnHeader, c)
+		}
+		w.Header().Add("Connection", "")
+		w.Header().Add("Connection", someConnHeader)
+		w.Header().Set(someConnHeader, "should be deleted")
+		io.WriteString(w, backendResponse)
+	}))
+	defer backend.Close()
+	backendURL, err := url.Parse(backend.URL)
+	if err != nil {
+		t.Fatal(err)
+	}
+	proxyHandler := NewSingleHostReverseProxy(backendURL)
+	frontend := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		proxyHandler.ServeHTTP(w, r)
+		if c := r.Header.Get(someConnHeader); c != "should be deleted" {
+			t.Errorf("handler modified header %q = %q; want %q", someConnHeader, c, "should be deleted")
+		}
+	}))
+	defer frontend.Close()
+
+	getReq, _ := http.NewRequest("GET", frontend.URL, nil)
+	getReq.Header.Add("Connection", "")
+	getReq.Header.Add("Connection", someConnHeader)
+	getReq.Header.Set(someConnHeader, "should be deleted")
+	res, err := frontend.Client().Do(getReq)
+	if err != nil {
+		t.Fatalf("Get: %v", err)
+	}
+	defer res.Body.Close()
+	bodyBytes, err := io.ReadAll(res.Body)
+	if err != nil {
+		t.Fatalf("reading body: %v", err)
+	}
+	if got, want := string(bodyBytes), backendResponse; got != want {
+		t.Errorf("got body %q; want %q", got, want)
+	}
+	if c := res.Header.Get("Connection"); c != "" {
+		t.Errorf("handler got header %q = %q; want empty", "Connection", c)
+	}
+	if c := res.Header.Get(someConnHeader); c != "" {
+		t.Errorf("handler got header %q = %q; want empty", someConnHeader, c)
+	}
+}
+
 func TestXForwardedFor(t *testing.T) {
 	const prevForwardedFor = "client ip"
 	const backendResponse = "I am the backend"
@@ -1062,6 +1122,45 @@ func TestReverseProxy_PanicBodyError(t *testing.T) {
 	rproxy.ServeHTTP(httptest.NewRecorder(), req)
 }
 
+// Issue #46866: panic without closing incoming request body causes a panic
+func TestReverseProxy_PanicClosesIncomingBody(t *testing.T) {
+	backend := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		out := "this call was relayed by the reverse proxy"
+		// Coerce a wrong content length to induce io.ErrUnexpectedEOF
+		w.Header().Set("Content-Length", fmt.Sprintf("%d", len(out)*2))
+		fmt.Fprintln(w, out)
+	}))
+	defer backend.Close()
+	backendURL, err := url.Parse(backend.URL)
+	if err != nil {
+		t.Fatal(err)
+	}
+	proxyHandler := NewSingleHostReverseProxy(backendURL)
+	proxyHandler.ErrorLog = log.New(io.Discard, "", 0) // quiet for tests
+	frontend := httptest.NewServer(proxyHandler)
+	defer frontend.Close()
+	frontendClient := frontend.Client()
+
+	var wg sync.WaitGroup
+	for i := 0; i < 2; i++ {
+		wg.Add(1)
+		go func() {
+			defer wg.Done()
+			for j := 0; j < 10; j++ {
+				const reqLen = 6 * 1024 * 1024
+				req, _ := http.NewRequest("POST", frontend.URL, &io.LimitedReader{R: neverEnding('x'), N: reqLen})
+				req.ContentLength = reqLen
+				resp, _ := frontendClient.Transport.RoundTrip(req)
+				if resp != nil {
+					io.Copy(io.Discard, resp.Body)
+					resp.Body.Close()
+				}
+			}
+		}()
+	}
+	wg.Wait()
+}
+
 func TestSelectFlushInterval(t *testing.T) {
 	tests := []struct {
 		name string
@@ -1183,7 +1282,7 @@ func TestReverseProxyWebSocket(t *testing.T) {
 		t.Errorf("Header(XHeader) = %q; want %q", got, want)
 	}
 
-	if upgradeType(res.Header) != "websocket" {
+	if !ascii.EqualFold(upgradeType(res.Header), "websocket") {
 		t.Fatalf("not websocket upgrade; got %#v", res.Header)
 	}
 	rwc, ok := res.Body.(io.ReadWriteCloser)
@@ -1208,7 +1307,7 @@ func TestReverseProxyWebSocket(t *testing.T) {
 	}
 }
 
-func TestReverseProxyWebSocketCancelation(t *testing.T) {
+func TestReverseProxyWebSocketCancellation(t *testing.T) {
 	n := 5
 	triggerCancelCh := make(chan bool, n)
 	nthResponse := func(i int) string {
@@ -1300,7 +1399,7 @@ func TestReverseProxyWebSocketCancelation(t *testing.T) {
 		t.Errorf("X-Header mismatch\n\tgot:  %q\n\twant: %q", g, w)
 	}
 
-	if g, w := upgradeType(res.Header), "websocket"; g != w {
+	if g, w := upgradeType(res.Header), "websocket"; !ascii.EqualFold(g, w) {
 		t.Fatalf("Upgrade header mismatch\n\tgot:  %q\n\twant: %q", g, w)
 	}
 
diff --git a/src/net/http/internal/ascii/print.go b/src/net/http/internal/ascii/print.go
new file mode 100644
index 0000000000..585e5baba4
--- /dev/null
+++ b/src/net/http/internal/ascii/print.go
@@ -0,0 +1,61 @@
+// Copyright 2021 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package ascii
+
+import (
+	"strings"
+	"unicode"
+)
+
+// EqualFold is strings.EqualFold, ASCII only. It reports whether s and t
+// are equal, ASCII-case-insensitively.
+func EqualFold(s, t string) bool {
+	if len(s) != len(t) {
+		return false
+	}
+	for i := 0; i < len(s); i++ {
+		if lower(s[i]) != lower(t[i]) {
+			return false
+		}
+	}
+	return true
+}
+
+// lower returns the ASCII lowercase version of b.
+func lower(b byte) byte {
+	if 'A' <= b && b <= 'Z' {
+		return b + ('a' - 'A')
+	}
+	return b
+}
+
+// IsPrint returns whether s is ASCII and printable according to
+// https://tools.ietf.org/html/rfc20#section-4.2.
+func IsPrint(s string) bool {
+	for i := 0; i < len(s); i++ {
+		if s[i] < ' ' || s[i] > '~' {
+			return false
+		}
+	}
+	return true
+}
+
+// Is returns whether s is ASCII.
+func Is(s string) bool {
+	for i := 0; i < len(s); i++ {
+		if s[i] > unicode.MaxASCII {
+			return false
+		}
+	}
+	return true
+}
+
+// ToLower returns the lowercase version of s if s is ASCII and printable.
+func ToLower(s string) (lower string, ok bool) {
+	if !IsPrint(s) {
+		return "", false
+	}
+	return strings.ToLower(s), true
+}
diff --git a/src/net/http/internal/ascii/print_test.go b/src/net/http/internal/ascii/print_test.go
new file mode 100644
index 0000000000..0b7767ca33
--- /dev/null
+++ b/src/net/http/internal/ascii/print_test.go
@@ -0,0 +1,95 @@
+// Copyright 2021 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package ascii
+
+import "testing"
+
+func TestEqualFold(t *testing.T) {
+	var tests = []struct {
+		name string
+		a, b string
+		want bool
+	}{
+		{
+			name: "empty",
+			want: true,
+		},
+		{
+			name: "simple match",
+			a:    "CHUNKED",
+			b:    "chunked",
+			want: true,
+		},
+		{
+			name: "same string",
+			a:    "chunked",
+			b:    "chunked",
+			want: true,
+		},
+		{
+			name: "Unicode Kelvin symbol",
+			a:    "chunKed", // This "K" is 'KELVIN SIGN' (\u212A)
+			b:    "chunked",
+			want: false,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := EqualFold(tt.a, tt.b); got != tt.want {
+				t.Errorf("AsciiEqualFold(%q,%q): got %v want %v", tt.a, tt.b, got, tt.want)
+			}
+		})
+	}
+}
+
+func TestIsPrint(t *testing.T) {
+	var tests = []struct {
+		name string
+		in   string
+		want bool
+	}{
+		{
+			name: "empty",
+			want: true,
+		},
+		{
+			name: "ASCII low",
+			in:   "This is a space: ' '",
+			want: true,
+		},
+		{
+			name: "ASCII high",
+			in:   "This is a tilde: '~'",
+			want: true,
+		},
+		{
+			name: "ASCII low non-print",
+			in:   "This is a unit separator: \x1F",
+			want: false,
+		},
+		{
+			name: "Ascii high non-print",
+			in:   "This is a Delete: \x7F",
+			want: false,
+		},
+		{
+			name: "Unicode letter",
+			in:   "Today it's 280K outside: it's freezing!", // This "K" is 'KELVIN SIGN' (\u212A)
+			want: false,
+		},
+		{
+			name: "Unicode emoji",
+			in:   "Gophers like 🧀",
+			want: false,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := IsPrint(tt.in); got != tt.want {
+				t.Errorf("IsASCIIPrint(%q): got %v want %v", tt.in, got, tt.want)
+			}
+		})
+	}
+}
diff --git a/src/net/http/internal/testcert.go b/src/net/http/internal/testcert/testcert.go
similarity index 94%
rename from src/net/http/internal/testcert.go
rename to src/net/http/internal/testcert/testcert.go
index 2284a836fb..5f94704ef5 100644
--- a/src/net/http/internal/testcert.go
+++ b/src/net/http/internal/testcert/testcert.go
@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-package internal
+// Package testcert contains a test-only localhost certificate.
+package testcert
 
 import "strings"
 
@@ -25,7 +26,7 @@ h1fIw3cSS2OolhloGw/XM6RWPWtPAlGykKLciQrBru5NAPvCMsb/I1DAceTiotQM
 fblo6RBxUQ==
 -----END CERTIFICATE-----`)
 
-// LocalhostKey is the private key for localhostCert.
+// LocalhostKey is the private key for LocalhostCert.
 var LocalhostKey = []byte(testingKey(`-----BEGIN RSA TESTING KEY-----
 MIICXgIBAAKBgQDuLnQAI3mDgey3VBzWnB2L39JUU4txjeVE6myuDqkM/uGlfjb9
 SjY1bIw4iA5sBBZzHi3z0h1YV8QPuxEbi4nW91IJm2gsvvZhIrCHS3l6afab4pZB
diff --git a/src/net/http/request.go b/src/net/http/request.go
index 4a07eb1c79..09cb0c7f56 100644
--- a/src/net/http/request.go
+++ b/src/net/http/request.go
@@ -19,6 +19,7 @@ import (
 	"mime/multipart"
 	"net"
 	"net/http/httptrace"
+	"net/http/internal/ascii"
 	"net/textproto"
 	"net/url"
 	urlpkg "net/url"
@@ -723,7 +724,7 @@ func idnaASCII(v string) (string, error) {
 	// version does not.
 	// Note that for correct ASCII IDNs ToASCII will only do considerably more
 	// work, but it will not cause an allocation.
-	if isASCII(v) {
+	if ascii.Is(v) {
 		return v, nil
 	}
 	return idna.Lookup.ToASCII(v)
@@ -948,7 +949,7 @@ func (r *Request) BasicAuth() (username, password string, ok bool) {
 func parseBasicAuth(auth string) (username, password string, ok bool) {
 	const prefix = "Basic "
 	// Case insensitive prefix match. See Issue 22736.
-	if len(auth) < len(prefix) || !strings.EqualFold(auth[:len(prefix)], prefix) {
+	if len(auth) < len(prefix) || !ascii.EqualFold(auth[:len(prefix)], prefix) {
 		return
 	}
 	c, err := base64.StdEncoding.DecodeString(auth[len(prefix):])
@@ -1292,16 +1293,18 @@ func (r *Request) ParseForm() error {
 // its file parts are stored in memory, with the remainder stored on
 // disk in temporary files.
 // ParseMultipartForm calls ParseForm if necessary.
+// If ParseForm returns an error, ParseMultipartForm returns it but also
+// continues parsing the request body.
 // After one call to ParseMultipartForm, subsequent calls have no effect.
 func (r *Request) ParseMultipartForm(maxMemory int64) error {
 	if r.MultipartForm == multipartByReader {
 		return errors.New("http: multipart handled by MultipartReader")
 	}
+	var parseFormErr error
 	if r.Form == nil {
-		err := r.ParseForm()
-		if err != nil {
-			return err
-		}
+		// Let errors in ParseForm fall through, and just
+		// return it at the end.
+		parseFormErr = r.ParseForm()
 	}
 	if r.MultipartForm != nil {
 		return nil
@@ -1328,7 +1331,7 @@ func (r *Request) ParseMultipartForm(maxMemory int64) error {
 
 	r.MultipartForm = f
 
-	return nil
+	return parseFormErr
 }
 
 // FormValue returns the first value for the named component of the query.
@@ -1456,5 +1459,5 @@ func requestMethodUsuallyLacksBody(method string) bool {
 // an HTTP/1 connection.
 func (r *Request) requiresHTTP1() bool {
 	return hasToken(r.Header.Get("Connection"), "upgrade") &&
-		strings.EqualFold(r.Header.Get("Upgrade"), "websocket")
+		ascii.EqualFold(r.Header.Get("Upgrade"), "websocket")
 }
diff --git a/src/net/http/request_test.go b/src/net/http/request_test.go
index 952828b395..4e0c4ba207 100644
--- a/src/net/http/request_test.go
+++ b/src/net/http/request_test.go
@@ -32,9 +32,26 @@ func TestQuery(t *testing.T) {
 	}
 }
 
+// Issue #25192: Test that ParseForm fails but still parses the form when an URL
+// containing a semicolon is provided.
+func TestParseFormSemicolonSeparator(t *testing.T) {
+	for _, method := range []string{"POST", "PATCH", "PUT", "GET"} {
+		req, _ := NewRequest(method, "http://www.google.com/search?q=foo;q=bar&a=1",
+			strings.NewReader("q"))
+		err := req.ParseForm()
+		if err == nil {
+			t.Fatalf(`for method %s, ParseForm expected an error, got success`, method)
+		}
+		wantForm := url.Values{"a": []string{"1"}}
+		if !reflect.DeepEqual(req.Form, wantForm) {
+			t.Fatalf("for method %s, ParseForm expected req.Form = %v, want %v", method, req.Form, wantForm)
+		}
+	}
+}
+
 func TestParseFormQuery(t *testing.T) {
 	req, _ := NewRequest("POST", "http://www.google.com/search?q=foo&q=bar&both=x&prio=1&orphan=nope&empty=not",
-		strings.NewReader("z=post&both=y&prio=2&=nokey&orphan;empty=&"))
+		strings.NewReader("z=post&both=y&prio=2&=nokey&orphan&empty=&"))
 	req.Header.Set("Content-Type", "application/x-www-form-urlencoded; param=value")
 
 	if q := req.FormValue("q"); q != "foo" {
@@ -365,6 +382,18 @@ func TestMultipartRequest(t *testing.T) {
 	validateTestMultipartContents(t, req, false)
 }
 
+// Issue #25192: Test that ParseMultipartForm fails but still parses the
+// multi-part form when an URL containing a semicolon is provided.
+func TestParseMultipartFormSemicolonSeparator(t *testing.T) {
+	req := newTestMultipartRequest(t)
+	req.URL = &url.URL{RawQuery: "q=foo;q=bar"}
+	if err := req.ParseMultipartForm(25); err == nil {
+		t.Fatal("ParseMultipartForm expected error due to invalid semicolon, got nil")
+	}
+	defer req.MultipartForm.RemoveAll()
+	validateTestMultipartContents(t, req, false)
+}
+
 func TestMultipartRequestAuto(t *testing.T) {
 	// Test that FormValue and FormFile automatically invoke
 	// ParseMultipartForm and return the right values.
diff --git a/src/net/http/serve_test.go b/src/net/http/serve_test.go
index a9714682c7..6394da3bb7 100644
--- a/src/net/http/serve_test.go
+++ b/src/net/http/serve_test.go
@@ -25,6 +25,7 @@ import (
 	"net/http/httptest"
 	"net/http/httputil"
 	"net/http/internal"
+	"net/http/internal/testcert"
 	"net/url"
 	"os"
 	"os/exec"
@@ -1475,7 +1476,7 @@ func TestServeTLS(t *testing.T) {
 	defer afterTest(t)
 	defer SetTestHookServerServe(nil)
 
-	cert, err := tls.X509KeyPair(internal.LocalhostCert, internal.LocalhostKey)
+	cert, err := tls.X509KeyPair(testcert.LocalhostCert, testcert.LocalhostKey)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -1599,7 +1600,7 @@ func TestAutomaticHTTP2_Serve_WithTLSConfig(t *testing.T) {
 }
 
 func TestAutomaticHTTP2_ListenAndServe(t *testing.T) {
-	cert, err := tls.X509KeyPair(internal.LocalhostCert, internal.LocalhostKey)
+	cert, err := tls.X509KeyPair(testcert.LocalhostCert, testcert.LocalhostKey)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -1609,7 +1610,7 @@ func TestAutomaticHTTP2_ListenAndServe(t *testing.T) {
 }
 
 func TestAutomaticHTTP2_ListenAndServe_GetCertificate(t *testing.T) {
-	cert, err := tls.X509KeyPair(internal.LocalhostCert, internal.LocalhostKey)
+	cert, err := tls.X509KeyPair(testcert.LocalhostCert, testcert.LocalhostKey)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -6524,3 +6525,87 @@ func TestMuxRedirectRelative(t *testing.T) {
 		t.Errorf("Expected response code %d; got %d", want, got)
 	}
 }
+
+// TestQuerySemicolon tests the behavior of semicolons in queries. See Issue 25192.
+func TestQuerySemicolon(t *testing.T) {
+	t.Cleanup(func() { afterTest(t) })
+
+	tests := []struct {
+		query           string
+		xNoSemicolons   string
+		xWithSemicolons string
+		warning         bool
+	}{
+		{"?a=1;x=bad&x=good", "good", "bad", true},
+		{"?a=1;b=bad&x=good", "good", "good", true},
+		{"?a=1%3Bx=bad&x=good%3B", "good;", "good;", false},
+		{"?a=1;x=good;x=bad", "", "good", true},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.query+"/allow=false", func(t *testing.T) {
+			allowSemicolons := false
+			testQuerySemicolon(t, tt.query, tt.xNoSemicolons, allowSemicolons, tt.warning)
+		})
+		t.Run(tt.query+"/allow=true", func(t *testing.T) {
+			allowSemicolons, expectWarning := true, false
+			testQuerySemicolon(t, tt.query, tt.xWithSemicolons, allowSemicolons, expectWarning)
+		})
+	}
+}
+
+func testQuerySemicolon(t *testing.T, query string, wantX string, allowSemicolons, expectWarning bool) {
+	setParallel(t)
+
+	writeBackX := func(w ResponseWriter, r *Request) {
+		x := r.URL.Query().Get("x")
+		if expectWarning {
+			if err := r.ParseForm(); err == nil || !strings.Contains(err.Error(), "semicolon") {
+				t.Errorf("expected error mentioning semicolons from ParseForm, got %v", err)
+			}
+		} else {
+			if err := r.ParseForm(); err != nil {
+				t.Errorf("expected no error from ParseForm, got %v", err)
+			}
+		}
+		if got := r.FormValue("x"); x != got {
+			t.Errorf("got %q from FormValue, want %q", got, x)
+		}
+		fmt.Fprintf(w, "%s", x)
+	}
+
+	h := Handler(HandlerFunc(writeBackX))
+	if allowSemicolons {
+		h = AllowQuerySemicolons(h)
+	}
+
+	ts := httptest.NewUnstartedServer(h)
+	logBuf := &bytes.Buffer{}
+	ts.Config.ErrorLog = log.New(logBuf, "", 0)
+	ts.Start()
+	defer ts.Close()
+
+	req, _ := NewRequest("GET", ts.URL+query, nil)
+	res, err := ts.Client().Do(req)
+	if err != nil {
+		t.Fatal(err)
+	}
+	slurp, _ := io.ReadAll(res.Body)
+	res.Body.Close()
+	if got, want := res.StatusCode, 200; got != want {
+		t.Errorf("Status = %d; want = %d", got, want)
+	}
+	if got, want := string(slurp), wantX; got != want {
+		t.Errorf("Body = %q; want = %q", got, want)
+	}
+
+	if expectWarning {
+		if !strings.Contains(logBuf.String(), "semicolon") {
+			t.Errorf("got %q from ErrorLog, expected a mention of semicolons", logBuf.String())
+		}
+	} else {
+		if strings.Contains(logBuf.String(), "semicolon") {
+			t.Errorf("got %q from ErrorLog, expected no mention of semicolons", logBuf.String())
+		}
+	}
+}
diff --git a/src/net/http/server.go b/src/net/http/server.go
index 4e73508973..5b113cff97 100644
--- a/src/net/http/server.go
+++ b/src/net/http/server.go
@@ -333,7 +333,7 @@ func (c *conn) hijackLocked() (rwc net.Conn, buf *bufio.ReadWriter, err error) {
 const bufferBeforeChunkingSize = 2048
 
 // chunkWriter writes to a response's conn buffer, and is the writer
-// wrapped by the response.bufw buffered writer.
+// wrapped by the response.w buffered writer.
 //
 // chunkWriter also is responsible for finalizing the Header, including
 // conditionally setting the Content-Type and setting a Content-Length
@@ -577,37 +577,17 @@ func (w *response) ReadFrom(src io.Reader) (n int64, err error) {
 		return io.CopyBuffer(writerOnly{w}, src, buf)
 	}
 
-	// sendfile path:
-
-	// Do not start actually writing response until src is readable.
-	// If body length is <= sniffLen, sendfile/splice path will do
-	// little anyway. This small read also satisfies sniffing the
-	// body in case Content-Type is missing.
-	nr, er := src.Read(buf[:sniffLen])
-	atEOF := errors.Is(er, io.EOF)
-	n += int64(nr)
-
-	if nr > 0 {
-		// Write the small amount read normally.
-		nw, ew := w.Write(buf[:nr])
-		if ew != nil {
-			err = ew
-		} else if nr != nw {
-			err = io.ErrShortWrite
+	// Copy the first sniffLen bytes before switching to ReadFrom.
+	// This ensures we don't start writing the response before the
+	// source is available (see golang.org/issue/5660) and provides
+	// enough bytes to perform Content-Type sniffing when required.
+	if !w.cw.wroteHeader {
+		n0, err := io.CopyBuffer(writerOnly{w}, io.LimitReader(src, sniffLen), buf)
+		n += n0
+		if err != nil || n0 < sniffLen {
+			return n, err
 		}
 	}
-	if err == nil && er != nil && !atEOF {
-		err = er
-	}
-
-	// Do not send StatusOK in the error case where nothing has been written.
-	if err == nil && !w.wroteHeader {
-		w.WriteHeader(StatusOK) // nr == 0, no error (or EOF)
-	}
-
-	if err != nil || atEOF {
-		return n, err
-	}
 
 	w.w.Flush()  // get rid of any previous writes
 	w.cw.flush() // make sure Header is written; flush data to rwc
@@ -620,7 +600,7 @@ func (w *response) ReadFrom(src io.Reader) (n int64, err error) {
 		return n, err
 	}
 
-	n0, err := io.Copy(writerOnly{w}, src)
+	n0, err := io.CopyBuffer(writerOnly{w}, src, buf)
 	n += n0
 	return n, err
 }
@@ -1549,12 +1529,12 @@ func (w *response) bodyAllowed() bool {
 // The Writers are wired together like:
 //
 // 1. *response (the ResponseWriter) ->
-// 2. (*response).w, a *bufio.Writer of bufferBeforeChunkingSize bytes
+// 2. (*response).w, a *bufio.Writer of bufferBeforeChunkingSize bytes ->
 // 3. chunkWriter.Writer (whose writeHeader finalizes Content-Length/Type)
-//    and which writes the chunk headers, if needed.
-// 4. conn.buf, a bufio.Writer of default (4kB) bytes, writing to ->
+//    and which writes the chunk headers, if needed ->
+// 4. conn.bufw, a *bufio.Writer of default (4kB) bytes, writing to ->
 // 5. checkConnErrorWriter{c}, which notes any non-nil error on Write
-//    and populates c.werr with it if so. but otherwise writes to:
+//    and populates c.werr with it if so, but otherwise writes to ->
 // 6. the rwc, the net.Conn.
 //
 // TODO(bradfitz): short-circuit some of the buffering when the
@@ -2882,9 +2862,51 @@ func (sh serverHandler) ServeHTTP(rw ResponseWriter, req *Request) {
 	if req.RequestURI == "*" && req.Method == "OPTIONS" {
 		handler = globalOptionsHandler{}
 	}
+
+	if req.URL != nil && strings.Contains(req.URL.RawQuery, ";") {
+		var allowQuerySemicolonsInUse int32
+		req = req.WithContext(context.WithValue(req.Context(), silenceSemWarnContextKey, func() {
+			atomic.StoreInt32(&allowQuerySemicolonsInUse, 1)
+		}))
+		defer func() {
+			if atomic.LoadInt32(&allowQuerySemicolonsInUse) == 0 {
+				sh.srv.logf("http: URL query contains semicolon, which is no longer a supported separator; parts of the query may be stripped when parsed; see golang.org/issue/25192")
+			}
+		}()
+	}
+
 	handler.ServeHTTP(rw, req)
 }
 
+var silenceSemWarnContextKey = &contextKey{"silence-semicolons"}
+
+// AllowQuerySemicolons returns a handler that serves requests by converting any
+// unescaped semicolons in the URL query to ampersands, and invoking the handler h.
+//
+// This restores the pre-Go 1.17 behavior of splitting query parameters on both
+// semicolons and ampersands. (See golang.org/issue/25192). Note that this
+// behavior doesn't match that of many proxies, and the mismatch can lead to
+// security issues.
+//
+// AllowQuerySemicolons should be invoked before Request.ParseForm is called.
+func AllowQuerySemicolons(h Handler) Handler {
+	return HandlerFunc(func(w ResponseWriter, r *Request) {
+		if silenceSemicolonsWarning, ok := r.Context().Value(silenceSemWarnContextKey).(func()); ok {
+			silenceSemicolonsWarning()
+		}
+		if strings.Contains(r.URL.RawQuery, ";") {
+			r2 := new(Request)
+			*r2 = *r
+			r2.URL = new(url.URL)
+			*r2.URL = *r.URL
+			r2.URL.RawQuery = strings.ReplaceAll(r.URL.RawQuery, ";", "&")
+			h.ServeHTTP(w, r2)
+		} else {
+			h.ServeHTTP(w, r)
+		}
+	})
+}
+
 // ListenAndServe listens on the TCP network address srv.Addr and then
 // calls Serve to handle requests on incoming connections.
 // Accepted connections are configured to enable TCP keep-alives.
diff --git a/src/net/http/sniff_test.go b/src/net/http/sniff_test.go
index 8d5350374d..e91335729a 100644
--- a/src/net/http/sniff_test.go
+++ b/src/net/http/sniff_test.go
@@ -157,9 +157,25 @@ func testServerIssue5953(t *testing.T, h2 bool) {
 	resp.Body.Close()
 }
 
-func TestContentTypeWithCopy_h1(t *testing.T) { testContentTypeWithCopy(t, h1Mode) }
-func TestContentTypeWithCopy_h2(t *testing.T) { testContentTypeWithCopy(t, h2Mode) }
-func testContentTypeWithCopy(t *testing.T, h2 bool) {
+type byteAtATimeReader struct {
+	buf []byte
+}
+
+func (b *byteAtATimeReader) Read(p []byte) (n int, err error) {
+	if len(p) < 1 {
+		return 0, nil
+	}
+	if len(b.buf) == 0 {
+		return 0, io.EOF
+	}
+	p[0] = b.buf[0]
+	b.buf = b.buf[1:]
+	return 1, nil
+}
+
+func TestContentTypeWithVariousSources_h1(t *testing.T) { testContentTypeWithVariousSources(t, h1Mode) }
+func TestContentTypeWithVariousSources_h2(t *testing.T) { testContentTypeWithVariousSources(t, h2Mode) }
+func testContentTypeWithVariousSources(t *testing.T, h2 bool) {
 	defer afterTest(t)
 
 	const (
@@ -167,30 +183,86 @@ func testContentTypeWithCopy(t *testing.T, h2 bool) {
 		expected = "text/html; charset=utf-8"
 	)
 
-	cst := newClientServerTest(t, h2, HandlerFunc(func(w ResponseWriter, r *Request) {
-		// Use io.Copy from a bytes.Buffer to trigger ReadFrom.
-		buf := bytes.NewBuffer([]byte(input))
-		n, err := io.Copy(w, buf)
-		if int(n) != len(input) || err != nil {
-			t.Errorf("io.Copy(w, %q) = %v, %v want %d, nil", input, n, err, len(input))
-		}
-	}))
-	defer cst.close()
+	for _, test := range []struct {
+		name    string
+		handler func(ResponseWriter, *Request)
+	}{{
+		name: "write",
+		handler: func(w ResponseWriter, r *Request) {
+			// Write the whole input at once.
+			n, err := w.Write([]byte(input))
+			if int(n) != len(input) || err != nil {
+				t.Errorf("w.Write(%q) = %v, %v want %d, nil", input, n, err, len(input))
+			}
+		},
+	}, {
+		name: "write one byte at a time",
+		handler: func(w ResponseWriter, r *Request) {
+			// Write the input one byte at a time.
+			buf := []byte(input)
+			for i := range buf {
+				n, err := w.Write(buf[i : i+1])
+				if n != 1 || err != nil {
+					t.Errorf("w.Write(%q) = %v, %v want 1, nil", input, n, err)
+				}
+			}
+		},
+	}, {
+		name: "copy from Reader",
+		handler: func(w ResponseWriter, r *Request) {
+			// Use io.Copy from a plain Reader.
+			type readerOnly struct{ io.Reader }
+			buf := bytes.NewBuffer([]byte(input))
+			n, err := io.Copy(w, readerOnly{buf})
+			if int(n) != len(input) || err != nil {
+				t.Errorf("io.Copy(w, %q) = %v, %v want %d, nil", input, n, err, len(input))
+			}
+		},
+	}, {
+		name: "copy from bytes.Buffer",
+		handler: func(w ResponseWriter, r *Request) {
+			// Use io.Copy from a bytes.Buffer to trigger ReadFrom.
+			buf := bytes.NewBuffer([]byte(input))
+			n, err := io.Copy(w, buf)
+			if int(n) != len(input) || err != nil {
+				t.Errorf("io.Copy(w, %q) = %v, %v want %d, nil", input, n, err, len(input))
+			}
+		},
+	}, {
+		name: "copy one byte at a time",
+		handler: func(w ResponseWriter, r *Request) {
+			// Use io.Copy from a Reader that returns one byte at a time.
+			n, err := io.Copy(w, &byteAtATimeReader{[]byte(input)})
+			if int(n) != len(input) || err != nil {
+				t.Errorf("io.Copy(w, %q) = %v, %v want %d, nil", input, n, err, len(input))
+			}
+		},
+	}} {
+		t.Run(test.name, func(t *testing.T) {
+			cst := newClientServerTest(t, h2, HandlerFunc(test.handler))
+			defer cst.close()
+
+			resp, err := cst.c.Get(cst.ts.URL)
+			if err != nil {
+				t.Fatalf("Get: %v", err)
+			}
+			if ct := resp.Header.Get("Content-Type"); ct != expected {
+				t.Errorf("Content-Type = %q, want %q", ct, expected)
+			}
+			if want, got := resp.Header.Get("Content-Length"), fmt.Sprint(len(input)); want != got {
+				t.Errorf("Content-Length = %q, want %q", want, got)
+			}
+			data, err := io.ReadAll(resp.Body)
+			if err != nil {
+				t.Errorf("reading body: %v", err)
+			} else if !bytes.Equal(data, []byte(input)) {
+				t.Errorf("data is %q, want %q", data, input)
+			}
+			resp.Body.Close()
+
+		})
 
-	resp, err := cst.c.Get(cst.ts.URL)
-	if err != nil {
-		t.Fatalf("Get: %v", err)
 	}
-	if ct := resp.Header.Get("Content-Type"); ct != expected {
-		t.Errorf("Content-Type = %q, want %q", ct, expected)
-	}
-	data, err := io.ReadAll(resp.Body)
-	if err != nil {
-		t.Errorf("reading body: %v", err)
-	} else if !bytes.Equal(data, []byte(input)) {
-		t.Errorf("data is %q, want %q", data, input)
-	}
-	resp.Body.Close()
 }
 
 func TestSniffWriteSize_h1(t *testing.T) { testSniffWriteSize(t, h1Mode) }
diff --git a/src/net/http/transfer.go b/src/net/http/transfer.go
index fbb0c39829..85c2e5a360 100644
--- a/src/net/http/transfer.go
+++ b/src/net/http/transfer.go
@@ -12,6 +12,7 @@ import (
 	"io"
 	"net/http/httptrace"
 	"net/http/internal"
+	"net/http/internal/ascii"
 	"net/textproto"
 	"reflect"
 	"sort"
@@ -638,7 +639,7 @@ func (t *transferReader) parseTransferEncoding() error {
 	if len(raw) != 1 {
 		return &unsupportedTEError{fmt.Sprintf("too many transfer encodings: %q", raw)}
 	}
-	if strings.ToLower(textproto.TrimString(raw[0])) != "chunked" {
+	if !ascii.EqualFold(textproto.TrimString(raw[0]), "chunked") {
 		return &unsupportedTEError{fmt.Sprintf("unsupported transfer encoding: %q", raw[0])}
 	}
 
diff --git a/src/net/http/transport.go b/src/net/http/transport.go
index 57018d2392..309194e8e5 100644
--- a/src/net/http/transport.go
+++ b/src/net/http/transport.go
@@ -21,6 +21,7 @@ import (
 	"log"
 	"net"
 	"net/http/httptrace"
+	"net/http/internal/ascii"
 	"net/textproto"
 	"net/url"
 	"os"
@@ -426,6 +427,7 @@ func (t *Transport) onceSetNextProtoDefaults() {
 //
 // The environment values may be either a complete URL or a
 // "host[:port]", in which case the "http" scheme is assumed.
+// The schemes "http", "https", and "socks5" are supported.
 // An error is returned if the value is a different form.
 //
 // A nil URL and nil error are returned if no proxy is defined in the
@@ -2185,7 +2187,7 @@ func (pc *persistConn) readLoop() {
 		}
 
 		resp.Body = body
-		if rc.addedGzip && strings.EqualFold(resp.Header.Get("Content-Encoding"), "gzip") {
+		if rc.addedGzip && ascii.EqualFold(resp.Header.Get("Content-Encoding"), "gzip") {
 			resp.Body = &gzipReader{body: body}
 			resp.Header.Del("Content-Encoding")
 			resp.Header.Del("Content-Length")
diff --git a/src/net/http/transport_internal_test.go b/src/net/http/transport_internal_test.go
index 1097ffd173..1cce27235d 100644
--- a/src/net/http/transport_internal_test.go
+++ b/src/net/http/transport_internal_test.go
@@ -12,7 +12,7 @@ import (
 	"errors"
 	"io"
 	"net"
-	"net/http/internal"
+	"net/http/internal/testcert"
 	"strings"
 	"testing"
 )
@@ -191,7 +191,7 @@ func (f roundTripFunc) RoundTrip(r *Request) (*Response, error) {
 
 // Issue 25009
 func TestTransportBodyAltRewind(t *testing.T) {
-	cert, err := tls.X509KeyPair(internal.LocalhostCert, internal.LocalhostKey)
+	cert, err := tls.X509KeyPair(testcert.LocalhostCert, testcert.LocalhostKey)
 	if err != nil {
 		t.Fatal(err)
 	}
diff --git a/src/net/http/transport_test.go b/src/net/http/transport_test.go
index 5b6a5aa992..690e0c299d 100644
--- a/src/net/http/transport_test.go
+++ b/src/net/http/transport_test.go
@@ -30,7 +30,7 @@ import (
 	"net/http/httptest"
 	"net/http/httptrace"
 	"net/http/httputil"
-	"net/http/internal"
+	"net/http/internal/testcert"
 	"net/textproto"
 	"net/url"
 	"os"
@@ -4299,7 +4299,7 @@ func TestTransportReuseConnEmptyResponseBody(t *testing.T) {
 
 // Issue 13839
 func TestNoCrashReturningTransportAltConn(t *testing.T) {
-	cert, err := tls.X509KeyPair(internal.LocalhostCert, internal.LocalhostKey)
+	cert, err := tls.X509KeyPair(testcert.LocalhostCert, testcert.LocalhostKey)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -5322,7 +5322,6 @@ func TestMissingStatusNoPanic(t *testing.T) {
 
 	ln := newLocalListener(t)
 	addr := ln.Addr().String()
-	shutdown := make(chan bool, 1)
 	done := make(chan bool)
 	fullAddrURL := fmt.Sprintf("http://%s", addr)
 	raw := "HTTP/1.1 400\r\n" +
@@ -5334,10 +5333,7 @@ func TestMissingStatusNoPanic(t *testing.T) {
 		"Aloha Olaa"
 
 	go func() {
-		defer func() {
-			ln.Close()
-			close(done)
-		}()
+		defer close(done)
 
 		conn, _ := ln.Accept()
 		if conn != nil {
@@ -5368,7 +5364,7 @@ func TestMissingStatusNoPanic(t *testing.T) {
 		t.Errorf("got=%v want=%q", err, want)
 	}
 
-	close(shutdown)
+	ln.Close()
 	<-done
 }
 
diff --git a/src/net/ip.go b/src/net/ip.go
index 0477269761..38e1aa2247 100644
--- a/src/net/ip.go
+++ b/src/net/ip.go
@@ -574,6 +574,10 @@ func parseIPv4(s string) IP {
 		if !ok || n > 0xFF {
 			return nil
 		}
+		if c > 1 && s[0] == '0' {
+			// Reject non-zero components with leading zeroes.
+			return nil
+		}
 		s = s[c:]
 		p[i] = byte(n)
 	}
diff --git a/src/net/ip_test.go b/src/net/ip_test.go
index 3af5e41ceb..5bbda6024d 100644
--- a/src/net/ip_test.go
+++ b/src/net/ip_test.go
@@ -21,9 +21,7 @@ var parseIPTests = []struct {
 }{
 	{"127.0.1.2", IPv4(127, 0, 1, 2)},
 	{"127.0.0.1", IPv4(127, 0, 0, 1)},
-	{"127.001.002.003", IPv4(127, 1, 2, 3)},
 	{"::ffff:127.1.2.3", IPv4(127, 1, 2, 3)},
-	{"::ffff:127.001.002.003", IPv4(127, 1, 2, 3)},
 	{"::ffff:7f01:0203", IPv4(127, 1, 2, 3)},
 	{"0:0:0:0:0000:ffff:127.1.2.3", IPv4(127, 1, 2, 3)},
 	{"0:0:0:0:000000:ffff:127.1.2.3", IPv4(127, 1, 2, 3)},
@@ -43,6 +41,11 @@ var parseIPTests = []struct {
 	{"fe80::1%911", nil},
 	{"", nil},
 	{"a1:a2:a3:a4::b1:b2:b3:b4", nil}, // Issue 6628
+	{"127.001.002.003", nil},
+	{"::ffff:127.001.002.003", nil},
+	{"123.000.000.000", nil},
+	{"1.2..4", nil},
+	{"0123.0.0.1", nil},
 }
 
 func TestParseIP(t *testing.T) {
@@ -358,6 +361,7 @@ var parseCIDRTests = []struct {
 	{"0.0.-2.0/32", nil, nil, &ParseError{Type: "CIDR address", Text: "0.0.-2.0/32"}},
 	{"0.0.0.-3/32", nil, nil, &ParseError{Type: "CIDR address", Text: "0.0.0.-3/32"}},
 	{"0.0.0.0/-0", nil, nil, &ParseError{Type: "CIDR address", Text: "0.0.0.0/-0"}},
+	{"127.000.000.001/32", nil, nil, &ParseError{Type: "CIDR address", Text: "127.000.000.001/32"}},
 	{"", nil, nil, &ParseError{Type: "CIDR address", Text: ""}},
 }
 
diff --git a/src/net/lookup.go b/src/net/lookup.go
index 03599503bd..d350ef7fc0 100644
--- a/src/net/lookup.go
+++ b/src/net/lookup.go
@@ -396,10 +396,13 @@ func (r *Resolver) LookupPort(ctx context.Context, network, service string) (por
 // contain DNS "CNAME" records, as long as host resolves to
 // address records.
 //
+// The returned canonical name is validated to be a properly
+// formatted presentation-format domain name.
+//
 // LookupCNAME uses context.Background internally; to specify the context, use
 // Resolver.LookupCNAME.
 func LookupCNAME(host string) (cname string, err error) {
-	return DefaultResolver.lookupCNAME(context.Background(), host)
+	return DefaultResolver.LookupCNAME(context.Background(), host)
 }
 
 // LookupCNAME returns the canonical name for the given host.
@@ -412,8 +415,18 @@ func LookupCNAME(host string) (cname string, err error) {
 // LookupCNAME does not return an error if host does not
 // contain DNS "CNAME" records, as long as host resolves to
 // address records.
-func (r *Resolver) LookupCNAME(ctx context.Context, host string) (cname string, err error) {
-	return r.lookupCNAME(ctx, host)
+//
+// The returned canonical name is validated to be a properly
+// formatted presentation-format domain name.
+func (r *Resolver) LookupCNAME(ctx context.Context, host string) (string, error) {
+	cname, err := r.lookupCNAME(ctx, host)
+	if err != nil {
+		return "", err
+	}
+	if !isDomainName(cname) {
+		return "", &DNSError{Err: errMalformedDNSRecordsDetail, Name: host}
+	}
+	return cname, nil
 }
 
 // LookupSRV tries to resolve an SRV query of the given service,
@@ -425,8 +438,13 @@ func (r *Resolver) LookupCNAME(ctx context.Context, host string) (cname string,
 // That is, it looks up _service._proto.name. To accommodate services
 // publishing SRV records under non-standard names, if both service
 // and proto are empty strings, LookupSRV looks up name directly.
+//
+// The returned service names are validated to be properly
+// formatted presentation-format domain names. If the response contains
+// invalid names, those records are filtered out and an error
+// will be returned alongside the the remaining results, if any.
 func LookupSRV(service, proto, name string) (cname string, addrs []*SRV, err error) {
-	return DefaultResolver.lookupSRV(context.Background(), service, proto, name)
+	return DefaultResolver.LookupSRV(context.Background(), service, proto, name)
 }
 
 // LookupSRV tries to resolve an SRV query of the given service,
@@ -438,34 +456,115 @@ func LookupSRV(service, proto, name string) (cname string, addrs []*SRV, err err
 // That is, it looks up _service._proto.name. To accommodate services
 // publishing SRV records under non-standard names, if both service
 // and proto are empty strings, LookupSRV looks up name directly.
-func (r *Resolver) LookupSRV(ctx context.Context, service, proto, name string) (cname string, addrs []*SRV, err error) {
-	return r.lookupSRV(ctx, service, proto, name)
+//
+// The returned service names are validated to be properly
+// formatted presentation-format domain names. If the response contains
+// invalid names, those records are filtered out and an error
+// will be returned alongside the the remaining results, if any.
+func (r *Resolver) LookupSRV(ctx context.Context, service, proto, name string) (string, []*SRV, error) {
+	cname, addrs, err := r.lookupSRV(ctx, service, proto, name)
+	if err != nil {
+		return "", nil, err
+	}
+	if cname != "" && !isDomainName(cname) {
+		return "", nil, &DNSError{Err: "SRV header name is invalid", Name: name}
+	}
+	filteredAddrs := make([]*SRV, 0, len(addrs))
+	for _, addr := range addrs {
+		if addr == nil {
+			continue
+		}
+		if !isDomainName(addr.Target) {
+			continue
+		}
+		filteredAddrs = append(filteredAddrs, addr)
+	}
+	if len(addrs) != len(filteredAddrs) {
+		return cname, filteredAddrs, &DNSError{Err: errMalformedDNSRecordsDetail, Name: name}
+	}
+	return cname, filteredAddrs, nil
 }
 
 // LookupMX returns the DNS MX records for the given domain name sorted by preference.
 //
+// The returned mail server names are validated to be properly
+// formatted presentation-format domain names. If the response contains
+// invalid names, those records are filtered out and an error
+// will be returned alongside the the remaining results, if any.
+//
 // LookupMX uses context.Background internally; to specify the context, use
 // Resolver.LookupMX.
 func LookupMX(name string) ([]*MX, error) {
-	return DefaultResolver.lookupMX(context.Background(), name)
+	return DefaultResolver.LookupMX(context.Background(), name)
 }
 
 // LookupMX returns the DNS MX records for the given domain name sorted by preference.
+//
+// The returned mail server names are validated to be properly
+// formatted presentation-format domain names. If the response contains
+// invalid names, those records are filtered out and an error
+// will be returned alongside the the remaining results, if any.
 func (r *Resolver) LookupMX(ctx context.Context, name string) ([]*MX, error) {
-	return r.lookupMX(ctx, name)
+	records, err := r.lookupMX(ctx, name)
+	if err != nil {
+		return nil, err
+	}
+	filteredMX := make([]*MX, 0, len(records))
+	for _, mx := range records {
+		if mx == nil {
+			continue
+		}
+		// Bypass the hostname validity check for targets which contain only a dot,
+		// as this is used to represent a 'Null' MX record.
+		if mx.Host != "." && !isDomainName(mx.Host) {
+			continue
+		}
+		filteredMX = append(filteredMX, mx)
+	}
+	if len(records) != len(filteredMX) {
+		return filteredMX, &DNSError{Err: errMalformedDNSRecordsDetail, Name: name}
+	}
+	return filteredMX, nil
 }
 
 // LookupNS returns the DNS NS records for the given domain name.
 //
+// The returned name server names are validated to be properly
+// formatted presentation-format domain names. If the response contains
+// invalid names, those records are filtered out and an error
+// will be returned alongside the the remaining results, if any.
+//
 // LookupNS uses context.Background internally; to specify the context, use
 // Resolver.LookupNS.
 func LookupNS(name string) ([]*NS, error) {
-	return DefaultResolver.lookupNS(context.Background(), name)
+	return DefaultResolver.LookupNS(context.Background(), name)
 }
 
 // LookupNS returns the DNS NS records for the given domain name.
+//
+// The returned name server names are validated to be properly
+// formatted presentation-format domain names. If the response contains
+// invalid names, those records are filtered out and an error
+// will be returned alongside the the remaining results, if any.
 func (r *Resolver) LookupNS(ctx context.Context, name string) ([]*NS, error) {
-	return r.lookupNS(ctx, name)
+	records, err := r.lookupNS(ctx, name)
+	if err != nil {
+		return nil, err
+	}
+	filteredNS := make([]*NS, 0, len(records))
+	for _, ns := range records {
+		if ns == nil {
+			continue
+		}
+		if !isDomainName(ns.Host) {
+			continue
+		}
+		filteredNS = append(filteredNS, ns)
+	}
+	if len(records) != len(filteredNS) {
+		return filteredNS, &DNSError{Err: errMalformedDNSRecordsDetail, Name: name}
+	}
+	return filteredNS, nil
 }
 
 // LookupTXT returns the DNS TXT records for the given domain name.
@@ -484,17 +583,43 @@ func (r *Resolver) LookupTXT(ctx context.Context, name string) ([]string, error)
 // LookupAddr performs a reverse lookup for the given address, returning a list
 // of names mapping to that address.
 //
+// The returned names are validated to be properly formatted presentation-format
+// domain names. If the response contains invalid names, those records are filtered
+// out and an error will be returned alongside the the remaining results, if any.
+//
 // When using the host C library resolver, at most one result will be
 // returned. To bypass the host resolver, use a custom Resolver.
 //
 // LookupAddr uses context.Background internally; to specify the context, use
 // Resolver.LookupAddr.
 func LookupAddr(addr string) (names []string, err error) {
-	return DefaultResolver.lookupAddr(context.Background(), addr)
+	return DefaultResolver.LookupAddr(context.Background(), addr)
 }
 
 // LookupAddr performs a reverse lookup for the given address, returning a list
 // of names mapping to that address.
-func (r *Resolver) LookupAddr(ctx context.Context, addr string) (names []string, err error) {
-	return r.lookupAddr(ctx, addr)
+//
+// The returned names are validated to be properly formatted presentation-format
+// domain names. If the response contains invalid names, those records are filtered
+// out and an error will be returned alongside the the remaining results, if any.
+func (r *Resolver) LookupAddr(ctx context.Context, addr string) ([]string, error) {
+	names, err := r.lookupAddr(ctx, addr)
+	if err != nil {
+		return nil, err
+	}
+	filteredNames := make([]string, 0, len(names))
+	for _, name := range names {
+		if isDomainName(name) {
+			filteredNames = append(filteredNames, name)
+		}
+	}
+	if len(names) != len(filteredNames) {
+		return filteredNames, &DNSError{Err: errMalformedDNSRecordsDetail, Name: addr}
+	}
+	return filteredNames, nil
 }
+
+// errMalformedDNSRecordsDetail is the DNSError detail which is returned when a Resolver.Lookup...
+// method recieves DNS records which contain invalid DNS names. This may be returned alongside
+// results which have had the malformed records filtered out.
+var errMalformedDNSRecordsDetail = "DNS response contained records which contain invalid names"
diff --git a/src/net/lookup_windows_test.go b/src/net/lookup_windows_test.go
index 62b61ed6c2..aa95501d02 100644
--- a/src/net/lookup_windows_test.go
+++ b/src/net/lookup_windows_test.go
@@ -299,7 +299,7 @@ func lookupPTR(name string) (ptr []string, err error) {
 	ptr = make([]string, 0, 10)
 	rx := regexp.MustCompile(`(?m)^Pinging\s+([a-zA-Z0-9.\-]+)\s+\[.*$`)
 	for _, ans := range rx.FindAllStringSubmatch(r, -1) {
-		ptr = append(ptr, ans[1]+".")
+		ptr = append(ptr, absDomainName([]byte(ans[1])))
 	}
 	return
 }
diff --git a/src/net/server_test.go b/src/net/server_test.go
index 8d4db7233d..7cbf152298 100644
--- a/src/net/server_test.go
+++ b/src/net/server_test.go
@@ -105,13 +105,6 @@ func TestTCPServer(t *testing.T) {
 					if perr := parseDialError(err); perr != nil {
 						t.Error(perr)
 					}
-					if tt.taddr == "::1" && os.Getenv("GO_BUILDER_NAME") == "darwin-amd64-10_12" && os.IsTimeout(err) {
-						// A suspected kernel bug in macOS 10.12 occasionally results in
-						// "i/o timeout" errors when dialing address ::1. The errors have not
-						// been observed on newer versions of the OS, so we don't plan to work
-						// around them. See https://golang.org/issue/32919.
-						t.Skipf("skipping due to error on known-flaky macOS 10.12 builder: %v", err)
-					}
 					t.Fatal(err)
 				}
 				defer c.Close()
diff --git a/src/net/testdata/ipv4-hosts b/src/net/testdata/ipv4-hosts
index 5208bb44ac..6b99675dfc 100644
--- a/src/net/testdata/ipv4-hosts
+++ b/src/net/testdata/ipv4-hosts
@@ -1,12 +1,8 @@
 # See https://tools.ietf.org/html/rfc1123.
-#
-# The literal IPv4 address parser in the net package is a relaxed
-# one. It may accept a literal IPv4 address in dotted-decimal notation
-# with leading zeros such as "001.2.003.4".
 
 # internet address and host name
 127.0.0.1	localhost	# inline comment separated by tab
-127.000.000.002	localhost       # inline comment separated by space
+127.0.0.2	localhost   # inline comment separated by space
 
 # internet address, host name and aliases
-127.000.000.003	localhost	localhost.localdomain
+127.0.0.3	localhost	localhost.localdomain
diff --git a/src/net/udpsock_posix.go b/src/net/udpsock_posix.go
index fcfb9c004c..96fb373ce7 100644
--- a/src/net/udpsock_posix.go
+++ b/src/net/udpsock_posix.go
@@ -50,6 +50,9 @@ func (c *UDPConn) readFrom(b []byte, addr *UDPAddr) (int, *UDPAddr, error) {
 		*addr = UDPAddr{IP: sa.Addr[0:], Port: sa.Port}
 	case *syscall.SockaddrInet6:
 		*addr = UDPAddr{IP: sa.Addr[0:], Port: sa.Port, Zone: zoneCache.name(int(sa.ZoneId))}
+	default:
+		// No sockaddr, so don't return UDPAddr.
+		addr = nil
 	}
 	return n, addr, err
 }
diff --git a/src/net/udpsock_test.go b/src/net/udpsock_test.go
index b4000b5664..0e8c3511c3 100644
--- a/src/net/udpsock_test.go
+++ b/src/net/udpsock_test.go
@@ -8,7 +8,9 @@
 package net
 
 import (
+	"errors"
 	"internal/testenv"
+	"os"
 	"reflect"
 	"runtime"
 	"testing"
@@ -446,6 +448,33 @@ func TestUDPReadSizeError(t *testing.T) {
 	}
 }
 
+// TestUDPReadTimeout verifies that ReadFromUDP with timeout returns an error
+// without data or an address.
+func TestUDPReadTimeout(t *testing.T) {
+	la, err := ResolveUDPAddr("udp4", "127.0.0.1:0")
+	if err != nil {
+		t.Fatal(err)
+	}
+	c, err := ListenUDP("udp4", la)
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer c.Close()
+
+	c.SetDeadline(time.Now())
+	b := make([]byte, 1)
+	n, addr, err := c.ReadFromUDP(b)
+	if !errors.Is(err, os.ErrDeadlineExceeded) {
+		t.Errorf("ReadFromUDP got err %v want os.ErrDeadlineExceeded", err)
+	}
+	if n != 0 {
+		t.Errorf("ReadFromUDP got n %d want 0", n)
+	}
+	if addr != nil {
+		t.Errorf("ReadFromUDP got addr %+#v want nil", addr)
+	}
+}
+
 func BenchmarkWriteToReadFromUDP(b *testing.B) {
 	conn, err := ListenUDP("udp4", &UDPAddr{IP: IPv4(127, 0, 0, 1)})
 	if err != nil {
diff --git a/src/net/url/example_test.go b/src/net/url/example_test.go
index cb9e8922a2..476132a1c9 100644
--- a/src/net/url/example_test.go
+++ b/src/net/url/example_test.go
@@ -72,13 +72,13 @@ func ExampleURL_ResolveReference() {
 }
 
 func ExampleParseQuery() {
-	m, err := url.ParseQuery(`x=1&y=2&y=3;z`)
+	m, err := url.ParseQuery(`x=1&y=2&y=3`)
 	if err != nil {
 		log.Fatal(err)
 	}
 	fmt.Println(toJSON(m))
 	// Output:
-	// {"x":["1"], "y":["2", "3"], "z":[""]}
+	// {"x":["1"], "y":["2", "3"]}
 }
 
 func ExampleURL_EscapedPath() {
diff --git a/src/net/url/url.go b/src/net/url/url.go
index 73bef22e45..20de0f6f51 100644
--- a/src/net/url/url.go
+++ b/src/net/url/url.go
@@ -921,9 +921,10 @@ func (v Values) Has(key string) bool {
 // valid query parameters found; err describes the first decoding error
 // encountered, if any.
 //
-// Query is expected to be a list of key=value settings separated by
-// ampersands or semicolons. A setting without an equals sign is
-// interpreted as a key set to an empty value.
+// Query is expected to be a list of key=value settings separated by ampersands.
+// A setting without an equals sign is interpreted as a key set to an empty
+// value.
+// Settings containing a non-URL-encoded semicolon are considered invalid.
 func ParseQuery(query string) (Values, error) {
 	m := make(Values)
 	err := parseQuery(m, query)
@@ -933,11 +934,15 @@ func ParseQuery(query string) (Values, error) {
 func parseQuery(m Values, query string) (err error) {
 	for query != "" {
 		key := query
-		if i := strings.IndexAny(key, "&;"); i >= 0 {
+		if i := strings.IndexAny(key, "&"); i >= 0 {
 			key, query = key[:i], key[i+1:]
 		} else {
 			query = ""
 		}
+		if strings.Contains(key, ";") {
+			err = fmt.Errorf("invalid semicolon separator in query")
+			continue
+		}
 		if key == "" {
 			continue
 		}
diff --git a/src/net/url/url_test.go b/src/net/url/url_test.go
index 55348c4a7d..63c8e695af 100644
--- a/src/net/url/url_test.go
+++ b/src/net/url/url_test.go
@@ -1334,57 +1334,125 @@ func TestQueryValues(t *testing.T) {
 type parseTest struct {
 	query string
 	out   Values
+	ok    bool
 }
 
 var parseTests = []parseTest{
+	{
+		query: "a=1",
+		out:   Values{"a": []string{"1"}},
+		ok:    true,
+	},
 	{
 		query: "a=1&b=2",
 		out:   Values{"a": []string{"1"}, "b": []string{"2"}},
+		ok:    true,
 	},
 	{
 		query: "a=1&a=2&a=banana",
 		out:   Values{"a": []string{"1", "2", "banana"}},
+		ok:    true,
 	},
 	{
 		query: "ascii=%3Ckey%3A+0x90%3E",
 		out:   Values{"ascii": []string{""}},
+		ok:    true,
+	}, {
+		query: "a=1;b=2",
+		out:   Values{},
+		ok:    false,
+	}, {
+		query: "a;b=1",
+		out:   Values{},
+		ok:    false,
+	}, {
+		query: "a=%3B", // hex encoding for semicolon
+		out:   Values{"a": []string{";"}},
+		ok:    true,
 	},
 	{
-		query: "a=1;b=2",
-		out:   Values{"a": []string{"1"}, "b": []string{"2"}},
+		query: "a%3Bb=1",
+		out:   Values{"a;b": []string{"1"}},
+		ok:    true,
 	},
 	{
 		query: "a=1&a=2;a=banana",
-		out:   Values{"a": []string{"1", "2", "banana"}},
+		out:   Values{"a": []string{"1"}},
+		ok:    false,
+	},
+	{
+		query: "a;b&c=1",
+		out:   Values{"c": []string{"1"}},
+		ok:    false,
+	},
+	{
+		query: "a=1&b=2;a=3&c=4",
+		out:   Values{"a": []string{"1"}, "c": []string{"4"}},
+		ok:    false,
+	},
+	{
+		query: "a=1&b=2;c=3",
+		out:   Values{"a": []string{"1"}},
+		ok:    false,
+	},
+	{
+		query: ";",
+		out:   Values{},
+		ok:    false,
+	},
+	{
+		query: "a=1;",
+		out:   Values{},
+		ok:    false,
+	},
+	{
+		query: "a=1&;",
+		out:   Values{"a": []string{"1"}},
+		ok:    false,
+	},
+	{
+		query: ";a=1&b=2",
+		out:   Values{"b": []string{"2"}},
+		ok:    false,
+	},
+	{
+		query: "a=1&b=2;",
+		out:   Values{"a": []string{"1"}},
+		ok:    false,
 	},
 }
 
 func TestParseQuery(t *testing.T) {
-	for i, test := range parseTests {
-		form, err := ParseQuery(test.query)
-		if err != nil {
-			t.Errorf("test %d: Unexpected error: %v", i, err)
-			continue
-		}
-		if len(form) != len(test.out) {
-			t.Errorf("test %d: len(form) = %d, want %d", i, len(form), len(test.out))
-		}
-		for k, evs := range test.out {
-			vs, ok := form[k]
-			if !ok {
-				t.Errorf("test %d: Missing key %q", i, k)
-				continue
+	for _, test := range parseTests {
+		t.Run(test.query, func(t *testing.T) {
+			form, err := ParseQuery(test.query)
+			if test.ok != (err == nil) {
+				want := ""
+				if test.ok {
+					want = ""
+				}
+				t.Errorf("Unexpected error: %v, want %v", err, want)
 			}
-			if len(vs) != len(evs) {
-				t.Errorf("test %d: len(form[%q]) = %d, want %d", i, k, len(vs), len(evs))
-				continue
+			if len(form) != len(test.out) {
+				t.Errorf("len(form) = %d, want %d", len(form), len(test.out))
 			}
-			for j, ev := range evs {
-				if v := vs[j]; v != ev {
-					t.Errorf("test %d: form[%q][%d] = %q, want %q", i, k, j, v, ev)
+			for k, evs := range test.out {
+				vs, ok := form[k]
+				if !ok {
+					t.Errorf("Missing key %q", k)
+					continue
+				}
+				if len(vs) != len(evs) {
+					t.Errorf("len(form[%q]) = %d, want %d", k, len(vs), len(evs))
+					continue
+				}
+				for j, ev := range evs {
+					if v := vs[j]; v != ev {
+						t.Errorf("form[%q][%d] = %q, want %q", k, j, v, ev)
+					}
 				}
 			}
-		}
+		})
 	}
 }
 
diff --git a/src/os/example_test.go b/src/os/example_test.go
index 3adce51784..e8554b0b12 100644
--- a/src/os/example_test.go
+++ b/src/os/example_test.go
@@ -5,6 +5,7 @@
 package os_test
 
 import (
+	"errors"
 	"fmt"
 	"io/fs"
 	"log"
@@ -71,9 +72,9 @@ func ExampleFileMode() {
 	}
 }
 
-func ExampleIsNotExist() {
+func ExampleErrNotExist() {
 	filename := "a-nonexistent-file"
-	if _, err := os.Stat(filename); os.IsNotExist(err) {
+	if _, err := os.Stat(filename); errors.Is(err, fs.ErrNotExist) {
 		fmt.Println("file does not exist")
 	}
 	// Output:
diff --git a/src/os/exec.go b/src/os/exec.go
index edb773a092..bc75d4dd66 100644
--- a/src/os/exec.go
+++ b/src/os/exec.go
@@ -54,6 +54,9 @@ type ProcAttr struct {
 	// standard error. An implementation may support additional entries,
 	// depending on the underlying operating system. A nil entry corresponds
 	// to that file being closed when the process starts.
+	// On Unix systems, StartProcess will change these File values
+	// to blocking mode, which means that SetDeadline will stop working
+	// and calling Close will not interrupt a Read or Write.
 	Files []*File
 
 	// Operating system-specific process creation attributes.
diff --git a/src/os/exec_windows.go b/src/os/exec_windows.go
index 5710401acd..239bed198f 100644
--- a/src/os/exec_windows.go
+++ b/src/os/exec_windows.go
@@ -45,16 +45,6 @@ func (p *Process) wait() (ps *ProcessState, err error) {
 	return &ProcessState{p.Pid, syscall.WaitStatus{ExitCode: ec}, &u}, nil
 }
 
-func terminateProcess(pid, exitcode int) error {
-	h, e := syscall.OpenProcess(syscall.PROCESS_TERMINATE, false, uint32(pid))
-	if e != nil {
-		return NewSyscallError("OpenProcess", e)
-	}
-	defer syscall.CloseHandle(h)
-	e = syscall.TerminateProcess(h, uint32(exitcode))
-	return NewSyscallError("TerminateProcess", e)
-}
-
 func (p *Process) signal(sig Signal) error {
 	handle := atomic.LoadUintptr(&p.handle)
 	if handle == uintptr(syscall.InvalidHandle) {
@@ -64,16 +54,22 @@ func (p *Process) signal(sig Signal) error {
 		return ErrProcessDone
 	}
 	if sig == Kill {
-		err := terminateProcess(p.Pid, 1)
+		var terminationHandle syscall.Handle
+		e := syscall.DuplicateHandle(^syscall.Handle(0), syscall.Handle(handle), ^syscall.Handle(0), &terminationHandle, syscall.PROCESS_TERMINATE, false, 0)
+		if e != nil {
+			return NewSyscallError("DuplicateHandle", e)
+		}
 		runtime.KeepAlive(p)
-		return err
+		defer syscall.CloseHandle(terminationHandle)
+		e = syscall.TerminateProcess(syscall.Handle(terminationHandle), 1)
+		return NewSyscallError("TerminateProcess", e)
 	}
 	// TODO(rsc): Handle Interrupt too?
 	return syscall.Errno(syscall.EWINDOWS)
 }
 
 func (p *Process) release() error {
-	handle := atomic.LoadUintptr(&p.handle)
+	handle := atomic.SwapUintptr(&p.handle, uintptr(syscall.InvalidHandle))
 	if handle == uintptr(syscall.InvalidHandle) {
 		return syscall.EINVAL
 	}
@@ -81,7 +77,6 @@ func (p *Process) release() error {
 	if e != nil {
 		return NewSyscallError("CloseHandle", e)
 	}
-	atomic.StoreUintptr(&p.handle, uintptr(syscall.InvalidHandle))
 	// no need for a finalizer anymore
 	runtime.SetFinalizer(p, nil)
 	return nil
diff --git a/src/os/fifo_test.go b/src/os/fifo_test.go
index 9b262f8205..007ed29129 100644
--- a/src/os/fifo_test.go
+++ b/src/os/fifo_test.go
@@ -26,9 +26,6 @@ func TestFifoEOF(t *testing.T) {
 	switch runtime.GOOS {
 	case "android":
 		t.Skip("skipping on Android; mkfifo syscall not available")
-	case "openbsd":
-		// On OpenBSD 6.2 this test just hangs for some reason.
-		t.Skip("skipping on OpenBSD; issue 25877")
 	}
 
 	dir := t.TempDir()
diff --git a/src/os/pipe_test.go b/src/os/pipe_test.go
index b663618502..41a1e9c78a 100644
--- a/src/os/pipe_test.go
+++ b/src/os/pipe_test.go
@@ -442,12 +442,14 @@ func TestFdReadRace(t *testing.T) {
 	defer r.Close()
 	defer w.Close()
 
-	c := make(chan bool)
+	const count = 10
+
+	c := make(chan bool, 1)
 	var wg sync.WaitGroup
 	wg.Add(1)
 	go func() {
 		defer wg.Done()
-		var buf [10]byte
+		var buf [count]byte
 		r.SetReadDeadline(time.Now().Add(time.Minute))
 		c <- true
 		if _, err := r.Read(buf[:]); os.IsTimeout(err) {
@@ -466,8 +468,9 @@ func TestFdReadRace(t *testing.T) {
 		r.Fd()
 
 		// The bug was that Fd would hang until Read timed out.
-		// If the bug is fixed, then closing r here will cause
-		// the Read to exit before the timeout expires.
+		// If the bug is fixed, then writing to w and closing r here
+		// will cause the Read to exit before the timeout expires.
+		w.Write(make([]byte, count))
 		r.Close()
 	}()
 
diff --git a/src/os/signal/signal_test.go b/src/os/signal/signal_test.go
index cea68742d2..649854b746 100644
--- a/src/os/signal/signal_test.go
+++ b/src/os/signal/signal_test.go
@@ -32,6 +32,11 @@ import (
 // The current value is set based on flakes observed in the Go builders.
 var settleTime = 100 * time.Millisecond
 
+// fatalWaitingTime is an absurdly long time to wait for signals to be
+// delivered but, using it, we (hopefully) eliminate test flakes on the
+// build servers. See #46736 for discussion.
+var fatalWaitingTime = 30 * time.Second
+
 func init() {
 	if testenv.Builder() == "solaris-amd64-oraclerel" {
 		// The solaris-amd64-oraclerel builder has been observed to time out in
@@ -84,7 +89,7 @@ func waitSig1(t *testing.T, c <-chan os.Signal, sig os.Signal, all bool) {
 	// General user code should filter out all unexpected signals instead of just
 	// SIGURG, but since os/signal is tightly coupled to the runtime it seems
 	// appropriate to be stricter here.
-	for time.Since(start) < settleTime {
+	for time.Since(start) < fatalWaitingTime {
 		select {
 		case s := <-c:
 			if s == sig {
@@ -97,7 +102,7 @@ func waitSig1(t *testing.T, c <-chan os.Signal, sig os.Signal, all bool) {
 			timer.Reset(settleTime / 10)
 		}
 	}
-	t.Fatalf("timeout after %v waiting for %v", settleTime, sig)
+	t.Fatalf("timeout after %v waiting for %v", fatalWaitingTime, sig)
 }
 
 // quiesce waits until we can be reasonably confident that all pending signals
diff --git a/src/path/filepath/path_test.go b/src/path/filepath/path_test.go
index cd107b6c85..bc5509b49c 100644
--- a/src/path/filepath/path_test.go
+++ b/src/path/filepath/path_test.go
@@ -1469,11 +1469,16 @@ func TestEvalSymlinksAboveRoot(t *testing.T) {
 	// Try different numbers of "..".
 	for _, i := range []int{c, c + 1, c + 2} {
 		check := strings.Join([]string{evalTmpDir, strings.Join(dd[:i], string(os.PathSeparator)), evalTmpDir[len(vol)+1:], "b", "file"}, string(os.PathSeparator))
-		if resolved, err := filepath.EvalSymlinks(check); err != nil {
+		resolved, err := filepath.EvalSymlinks(check)
+		switch {
+		case runtime.GOOS == "darwin" && errors.Is(err, fs.ErrNotExist):
+			// On darwin, the temp dir is sometimes cleaned up mid-test (issue 37910).
+			testenv.SkipFlaky(t, 37910)
+		case err != nil:
 			t.Errorf("EvalSymlinks(%q) failed: %v", check, err)
-		} else if !strings.HasSuffix(resolved, wantSuffix) {
+		case !strings.HasSuffix(resolved, wantSuffix):
 			t.Errorf("EvalSymlinks(%q) = %q does not end with %q", check, resolved, wantSuffix)
-		} else {
+		default:
 			t.Logf("EvalSymlinks(%q) = %q", check, resolved)
 		}
 	}
diff --git a/src/reflect/abi_test.go b/src/reflect/abi_test.go
index 1a2a48b5ed..5a0130f7b4 100644
--- a/src/reflect/abi_test.go
+++ b/src/reflect/abi_test.go
@@ -79,7 +79,34 @@ func TestMethodValueCallABI(t *testing.T) {
 		t.Errorf("bad method value call: got %#v, want %#v", r2, a2)
 	}
 	if s.Value != 3 {
-		t.Errorf("bad method value call: failed to set s.Value: got %d, want %d", s.Value, 1)
+		t.Errorf("bad method value call: failed to set s.Value: got %d, want %d", s.Value, 3)
+	}
+
+	s, i = makeMethodValue("ValueRegMethodSpillInt")
+	f3 := i.(func(StructFillRegs, int, MagicLastTypeNameForTestingRegisterABI) (StructFillRegs, int))
+	r3a, r3b := f3(a2, 42, MagicLastTypeNameForTestingRegisterABI{})
+	if r3a != a2 {
+		t.Errorf("bad method value call: got %#v, want %#v", r3a, a2)
+	}
+	if r3b != 42 {
+		t.Errorf("bad method value call: got %#v, want %#v", r3b, 42)
+	}
+	if s.Value != 4 {
+		t.Errorf("bad method value call: failed to set s.Value: got %d, want %d", s.Value, 4)
+	}
+
+	s, i = makeMethodValue("ValueRegMethodSpillPtr")
+	f4 := i.(func(StructFillRegs, *byte, MagicLastTypeNameForTestingRegisterABI) (StructFillRegs, *byte))
+	vb := byte(10)
+	r4a, r4b := f4(a2, &vb, MagicLastTypeNameForTestingRegisterABI{})
+	if r4a != a2 {
+		t.Errorf("bad method value call: got %#v, want %#v", r4a, a2)
+	}
+	if r4b != &vb {
+		t.Errorf("bad method value call: got %#v, want %#v", r4b, &vb)
+	}
+	if s.Value != 5 {
+		t.Errorf("bad method value call: failed to set s.Value: got %d, want %d", s.Value, 5)
 	}
 }
 
@@ -112,6 +139,20 @@ func (m *StructWithMethods) SpillStructCall(s StructFillRegs, _ MagicLastTypeNam
 	return s
 }
 
+// When called as a method value, i is passed on the stack.
+// When called as a method, i is passed in a register.
+func (m *StructWithMethods) ValueRegMethodSpillInt(s StructFillRegs, i int, _ MagicLastTypeNameForTestingRegisterABI) (StructFillRegs, int) {
+	m.Value = 4
+	return s, i
+}
+
+// When called as a method value, i is passed on the stack.
+// When called as a method, i is passed in a register.
+func (m *StructWithMethods) ValueRegMethodSpillPtr(s StructFillRegs, i *byte, _ MagicLastTypeNameForTestingRegisterABI) (StructFillRegs, *byte) {
+	m.Value = 5
+	return s, i
+}
+
 func TestReflectCallABI(t *testing.T) {
 	// Enable register-based reflect.Call and ensure we don't
 	// use potentially incorrect cached versions by clearing
diff --git a/src/reflect/all_test.go b/src/reflect/all_test.go
index 065ff04611..eac27e886f 100644
--- a/src/reflect/all_test.go
+++ b/src/reflect/all_test.go
@@ -4304,6 +4304,9 @@ func TestConvert(t *testing.T) {
 
 		// vout1 represents the in value converted to the in type.
 		v1 := tt.in
+		if !v1.CanConvert(t1) {
+			t.Errorf("ValueOf(%T(%[1]v)).CanConvert(%s) = false, want true", tt.in.Interface(), t1)
+		}
 		vout1 := v1.Convert(t1)
 		out1 := vout1.Interface()
 		if vout1.Type() != tt.in.Type() || !DeepEqual(out1, tt.in.Interface()) {
@@ -4311,6 +4314,9 @@ func TestConvert(t *testing.T) {
 		}
 
 		// vout2 represents the in value converted to the out type.
+		if !v1.CanConvert(t2) {
+			t.Errorf("ValueOf(%T(%[1]v)).CanConvert(%s) = false, want true", tt.in.Interface(), t2)
+		}
 		vout2 := v1.Convert(t2)
 		out2 := vout2.Interface()
 		if vout2.Type() != tt.out.Type() || !DeepEqual(out2, tt.out.Interface()) {
@@ -4371,7 +4377,10 @@ func TestConvertPanic(t *testing.T) {
 	if !v.Type().ConvertibleTo(pt) {
 		t.Errorf("[]byte should be convertible to *[8]byte")
 	}
-	shouldPanic("reflect: cannot convert slice with length 4 to array pointer with length 8", func() {
+	if v.CanConvert(pt) {
+		t.Errorf("slice with length 4 should not be convertible to *[8]byte")
+	}
+	shouldPanic("reflect: cannot convert slice with length 4 to pointer to array with length 8", func() {
 		_ = v.Convert(pt)
 	})
 }
@@ -6942,19 +6951,6 @@ func TestExported(t *testing.T) {
 	}
 }
 
-type embed struct {
-	EmbedWithUnexpMeth
-}
-
-func TestNameBytesAreAligned(t *testing.T) {
-	typ := TypeOf(embed{})
-	b := FirstMethodNameBytes(typ)
-	v := uintptr(unsafe.Pointer(b))
-	if v%unsafe.Alignof((*byte)(nil)) != 0 {
-		t.Errorf("reflect.name.bytes pointer is not aligned: %x", v)
-	}
-}
-
 func TestTypeStrings(t *testing.T) {
 	type stringTest struct {
 		typ  Type
diff --git a/src/reflect/asm_mips64x.s b/src/reflect/asm_mips64x.s
index ae661262cb..8d01c5fb7e 100644
--- a/src/reflect/asm_mips64x.s
+++ b/src/reflect/asm_mips64x.s
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build mips64 || mips64le
 // +build mips64 mips64le
 
 #include "textflag.h"
diff --git a/src/reflect/asm_mipsx.s b/src/reflect/asm_mipsx.s
index 47fef844a1..6ea8233108 100644
--- a/src/reflect/asm_mipsx.s
+++ b/src/reflect/asm_mipsx.s
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build mips || mipsle
 // +build mips mipsle
 
 #include "textflag.h"
diff --git a/src/reflect/asm_ppc64x.s b/src/reflect/asm_ppc64x.s
index 010811c31a..d955e4110f 100644
--- a/src/reflect/asm_ppc64x.s
+++ b/src/reflect/asm_ppc64x.s
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build ppc64 || ppc64le
 // +build ppc64 ppc64le
 
 #include "textflag.h"
diff --git a/src/reflect/type.go b/src/reflect/type.go
index 9727bfe467..f672a7a5d5 100644
--- a/src/reflect/type.go
+++ b/src/reflect/type.go
@@ -107,10 +107,14 @@ type Type interface {
 
 	// ConvertibleTo reports whether a value of the type is convertible to type u.
 	// Even if ConvertibleTo returns true, the conversion may still panic.
+	// For example, a slice of type []T is convertible to *[N]T,
+	// but the conversion will panic if its length is less than N.
 	ConvertibleTo(u Type) bool
 
 	// Comparable reports whether values of this type are comparable.
 	// Even if Comparable returns true, the comparison may still panic.
+	// For example, values of interface type are comparable,
+	// but the comparison will panic if their dynamic type is not comparable.
 	Comparable() bool
 
 	// Methods applicable only to some types, depending on Kind.
@@ -224,7 +228,7 @@ type Type interface {
 // See https://golang.org/issue/4876 for more details.
 
 /*
- * These data structures are known to the compiler (../../cmd/internal/gc/reflect.go).
+ * These data structures are known to the compiler (../../cmd/internal/reflectdata/reflect.go).
  * A few are known to ../runtime/type.go to convey to debuggers.
  * They are also known to ../runtime/type.go.
  */
@@ -267,7 +271,7 @@ const (
 // available in the memory directly following the rtype value.
 //
 // tflag values must be kept in sync with copies in:
-//	cmd/compile/internal/gc/reflect.go
+//	cmd/compile/internal/reflectdata/reflect.go
 //	cmd/link/internal/ld/decodesym.go
 //	runtime/type.go
 type tflag uint8
@@ -450,14 +454,11 @@ type structType struct {
 //	1<<1 tag data follows the name
 //	1<<2 pkgPath nameOff follows the name and tag
 //
-// The next two bytes are the data length:
+// Following that, there is a varint-encoded length of the name,
+// followed by the name itself.
 //
-//	 l := uint16(data[1])<<8 | uint16(data[2])
-//
-// Bytes [3:3+l] are the string data.
-//
-// If tag data follows then bytes 3+l and 3+l+1 are the tag length,
-// with the data following.
+// If tag data is present, it also has a varint-encoded length
+// followed by the tag itself.
 //
 // If the import path follows, then 4 bytes at the end of
 // the data form a nameOff. The import path is only set for concrete
@@ -465,6 +466,13 @@ type structType struct {
 //
 // If a name starts with "*", then the exported bit represents
 // whether the pointed to type is exported.
+//
+// Note: this encoding must match here and in:
+//   cmd/compile/internal/reflectdata/reflect.go
+//   runtime/type.go
+//   internal/reflectlite/type.go
+//   cmd/link/internal/ld/decodesym.go
+
 type name struct {
 	bytes *byte
 }
@@ -477,49 +485,70 @@ func (n name) isExported() bool {
 	return (*n.bytes)&(1<<0) != 0
 }
 
-func (n name) nameLen() int {
-	return int(uint16(*n.data(1, "name len field"))<<8 | uint16(*n.data(2, "name len field")))
+func (n name) hasTag() bool {
+	return (*n.bytes)&(1<<1) != 0
 }
 
-func (n name) tagLen() int {
-	if *n.data(0, "name flag field")&(1<<1) == 0 {
-		return 0
+// readVarint parses a varint as encoded by encoding/binary.
+// It returns the number of encoded bytes and the encoded value.
+func (n name) readVarint(off int) (int, int) {
+	v := 0
+	for i := 0; ; i++ {
+		x := *n.data(off+i, "read varint")
+		v += int(x&0x7f) << (7 * i)
+		if x&0x80 == 0 {
+			return i + 1, v
+		}
+	}
+}
+
+// writeVarint writes n to buf in varint form. Returns the
+// number of bytes written. n must be nonnegative.
+// Writes at most 10 bytes.
+func writeVarint(buf []byte, n int) int {
+	for i := 0; ; i++ {
+		b := byte(n & 0x7f)
+		n >>= 7
+		if n == 0 {
+			buf[i] = b
+			return i + 1
+		}
+		buf[i] = b | 0x80
 	}
-	off := 3 + n.nameLen()
-	return int(uint16(*n.data(off, "name taglen field"))<<8 | uint16(*n.data(off+1, "name taglen field")))
 }
 
 func (n name) name() (s string) {
 	if n.bytes == nil {
 		return
 	}
-	b := (*[4]byte)(unsafe.Pointer(n.bytes))
-
+	i, l := n.readVarint(1)
 	hdr := (*unsafeheader.String)(unsafe.Pointer(&s))
-	hdr.Data = unsafe.Pointer(&b[3])
-	hdr.Len = int(b[1])<<8 | int(b[2])
-	return s
+	hdr.Data = unsafe.Pointer(n.data(1+i, "non-empty string"))
+	hdr.Len = l
+	return
 }
 
 func (n name) tag() (s string) {
-	tl := n.tagLen()
-	if tl == 0 {
+	if !n.hasTag() {
 		return ""
 	}
-	nl := n.nameLen()
+	i, l := n.readVarint(1)
+	i2, l2 := n.readVarint(1 + i + l)
 	hdr := (*unsafeheader.String)(unsafe.Pointer(&s))
-	hdr.Data = unsafe.Pointer(n.data(3+nl+2, "non-empty string"))
-	hdr.Len = tl
-	return s
+	hdr.Data = unsafe.Pointer(n.data(1+i+l+i2, "non-empty string"))
+	hdr.Len = l2
+	return
 }
 
 func (n name) pkgPath() string {
 	if n.bytes == nil || *n.data(0, "name flag field")&(1<<2) == 0 {
 		return ""
 	}
-	off := 3 + n.nameLen()
-	if tl := n.tagLen(); tl > 0 {
-		off += 2 + tl
+	i, l := n.readVarint(1)
+	off := 1 + i + l
+	if n.hasTag() {
+		i2, l2 := n.readVarint(off)
+		off += i2 + l2
 	}
 	var nameOff int32
 	// Note that this field may not be aligned in memory,
@@ -530,33 +559,35 @@ func (n name) pkgPath() string {
 }
 
 func newName(n, tag string, exported bool) name {
-	if len(n) > 1<<16-1 {
-		panic("reflect.nameFrom: name too long: " + n)
+	if len(n) >= 1<<29 {
+		panic("reflect.nameFrom: name too long: " + n[:1024] + "...")
 	}
-	if len(tag) > 1<<16-1 {
-		panic("reflect.nameFrom: tag too long: " + tag)
+	if len(tag) >= 1<<29 {
+		panic("reflect.nameFrom: tag too long: " + tag[:1024] + "...")
 	}
+	var nameLen [10]byte
+	var tagLen [10]byte
+	nameLenLen := writeVarint(nameLen[:], len(n))
+	tagLenLen := writeVarint(tagLen[:], len(tag))
 
 	var bits byte
-	l := 1 + 2 + len(n)
+	l := 1 + nameLenLen + len(n)
 	if exported {
 		bits |= 1 << 0
 	}
 	if len(tag) > 0 {
-		l += 2 + len(tag)
+		l += tagLenLen + len(tag)
 		bits |= 1 << 1
 	}
 
 	b := make([]byte, l)
 	b[0] = bits
-	b[1] = uint8(len(n) >> 8)
-	b[2] = uint8(len(n))
-	copy(b[3:], n)
+	copy(b[1:], nameLen[:nameLenLen])
+	copy(b[1+nameLenLen:], n)
 	if len(tag) > 0 {
-		tb := b[3+len(n):]
-		tb[0] = uint8(len(tag) >> 8)
-		tb[1] = uint8(len(tag))
-		copy(tb[2:], tag)
+		tb := b[1+nameLenLen+len(n):]
+		copy(tb, tagLen[:tagLenLen])
+		copy(tb[tagLenLen:], tag)
 	}
 
 	return name{bytes: &b[0]}
@@ -1879,7 +1910,7 @@ func MapOf(key, elem Type) Type {
 
 	// Make a map type.
 	// Note: flag values must match those used in the TMAP case
-	// in ../cmd/compile/internal/gc/reflect.go:writeType.
+	// in ../cmd/compile/internal/reflectdata/reflect.go:writeType.
 	var imap interface{} = (map[unsafe.Pointer]unsafe.Pointer)(nil)
 	mt := **(**mapType)(unsafe.Pointer(&imap))
 	mt.str = resolveReflectName(newName(s, "", false))
@@ -2570,7 +2601,7 @@ func StructOf(fields []StructField) Type {
 		hash = fnv1(hash, byte(ft.hash>>24), byte(ft.hash>>16), byte(ft.hash>>8), byte(ft.hash))
 
 		repr = append(repr, (" " + ft.String())...)
-		if f.name.tagLen() > 0 {
+		if f.name.hasTag() {
 			hash = fnv1(hash, []byte(f.name.tag())...)
 			repr = append(repr, (" " + strconv.Quote(f.name.tag()))...)
 		}
@@ -2810,7 +2841,7 @@ func runtimeStructField(field StructField) (structField, string) {
 
 // typeptrdata returns the length in bytes of the prefix of t
 // containing pointer data. Anything after this offset is scalar data.
-// keep in sync with ../cmd/compile/internal/gc/reflect.go
+// keep in sync with ../cmd/compile/internal/reflectdata/reflect.go
 func typeptrdata(t *rtype) uintptr {
 	switch t.Kind() {
 	case Struct:
@@ -2834,7 +2865,7 @@ func typeptrdata(t *rtype) uintptr {
 	}
 }
 
-// See cmd/compile/internal/gc/reflect.go for derivation of constant.
+// See cmd/compile/internal/reflectdata/reflect.go for derivation of constant.
 const maxPtrmaskBytes = 2048
 
 // ArrayOf returns the array type with the given length and element type.
diff --git a/src/reflect/value.go b/src/reflect/value.go
index 418dff781f..6f878eba5b 100644
--- a/src/reflect/value.go
+++ b/src/reflect/value.go
@@ -952,25 +952,47 @@ func callMethod(ctxt *methodValue, frame unsafe.Pointer, retValid *bool, regs *a
 			continue
 		}
 
-		// There are three cases to handle in translating each
+		// There are four cases to handle in translating each
 		// argument:
 		// 1. Stack -> stack translation.
-		// 2. Registers -> stack translation.
-		// 3. Registers -> registers translation.
-		// The fourth cases can't happen, because a method value
-		// call uses strictly fewer registers than a method call.
+		// 2. Stack -> registers translation.
+		// 3. Registers -> stack translation.
+		// 4. Registers -> registers translation.
+		// TODO(mknyszek): Cases 2 and 3 below only work on little endian
+		// architectures. This is OK for now, but this needs to be fixed
+		// before supporting the register ABI on big endian architectures.
 
 		// If the value ABI passes the value on the stack,
 		// then the method ABI does too, because it has strictly
 		// fewer arguments. Simply copy between the two.
 		if vStep := valueSteps[0]; vStep.kind == abiStepStack {
 			mStep := methodSteps[0]
-			if mStep.kind != abiStepStack || vStep.size != mStep.size {
-				panic("method ABI and value ABI do not align")
+			// Handle stack -> stack translation.
+			if mStep.kind == abiStepStack {
+				if vStep.size != mStep.size {
+					panic("method ABI and value ABI do not align")
+				}
+				typedmemmove(t,
+					add(methodFrame, mStep.stkOff, "precomputed stack offset"),
+					add(valueFrame, vStep.stkOff, "precomputed stack offset"))
+				continue
+			}
+			// Handle stack -> register translation.
+			for _, mStep := range methodSteps {
+				from := add(valueFrame, vStep.stkOff+mStep.offset, "precomputed stack offset")
+				switch mStep.kind {
+				case abiStepPointer:
+					// Do the pointer copy directly so we get a write barrier.
+					methodRegs.Ptrs[mStep.ireg] = *(*unsafe.Pointer)(from)
+					fallthrough // We need to make sure this ends up in Ints, too.
+				case abiStepIntReg:
+					memmove(unsafe.Pointer(&methodRegs.Ints[mStep.ireg]), from, mStep.size)
+				case abiStepFloatReg:
+					memmove(unsafe.Pointer(&methodRegs.Floats[mStep.freg]), from, mStep.size)
+				default:
+					panic("unexpected method step")
+				}
 			}
-			typedmemmove(t,
-				add(methodFrame, mStep.stkOff, "precomputed stack offset"),
-				add(valueFrame, vStep.stkOff, "precomputed stack offset"))
 			continue
 		}
 		// Handle register -> stack translation.
@@ -1359,10 +1381,16 @@ func valueInterface(v Value, safe bool) interface{} {
 	return packEface(v)
 }
 
-// InterfaceData returns the interface v's value as a uintptr pair.
+// InterfaceData returns a pair of unspecified uintptr values.
 // It panics if v's Kind is not Interface.
+//
+// In earlier versions of Go, this function returned the interface's
+// value as a uintptr pair. As of Go 1.4, the implementation of
+// interface values precludes any defined use of InterfaceData.
+//
+// Deprecated: The memory representation of interface values is not
+// compatible with InterfaceData.
 func (v Value) InterfaceData() [2]uintptr {
-	// TODO: deprecate this
 	v.mustBe(Interface)
 	// We treat this as a read operation, so we allow
 	// it even for unexported data, because the caller
@@ -2783,6 +2811,26 @@ func (v Value) Convert(t Type) Value {
 	return op(v, t)
 }
 
+// CanConvert reports whether the value v can be converted to type t.
+// If v.CanConvert(t) returns true then v.Convert(t) will not panic.
+func (v Value) CanConvert(t Type) bool {
+	vt := v.Type()
+	if !vt.ConvertibleTo(t) {
+		return false
+	}
+	// Currently the only conversion that is OK in terms of type
+	// but that can panic depending on the value is converting
+	// from slice to pointer-to-array.
+	if vt.Kind() == Slice && t.Kind() == Ptr && t.Elem().Kind() == Array {
+		n := t.Elem().Len()
+		h := (*unsafeheader.Slice)(v.ptr)
+		if n > h.Len {
+			return false
+		}
+	}
+	return true
+}
+
 // convertOp returns the function to convert a value of type src
 // to a value of type dst. If the conversion is illegal, convertOp returns nil.
 func convertOp(dst, src *rtype) func(Value, Type) Value {
@@ -3045,7 +3093,7 @@ func cvtSliceArrayPtr(v Value, t Type) Value {
 	n := t.Elem().Len()
 	h := (*unsafeheader.Slice)(v.ptr)
 	if n > h.Len {
-		panic("reflect: cannot convert slice with length " + itoa.Itoa(h.Len) + " to array pointer with length " + itoa.Itoa(n))
+		panic("reflect: cannot convert slice with length " + itoa.Itoa(h.Len) + " to pointer to array with length " + itoa.Itoa(n))
 	}
 	return Value{t.common(), h.Data, v.flag&^(flagIndir|flagAddr|flagKindMask) | flag(Ptr)}
 }
diff --git a/src/reflect/visiblefields.go b/src/reflect/visiblefields.go
index c068979dcc..1a2b53570b 100644
--- a/src/reflect/visiblefields.go
+++ b/src/reflect/visiblefields.go
@@ -1,3 +1,7 @@
+// Copyright 2021 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
 package reflect
 
 // VisibleFields returns all the visible fields in t, which must be a
diff --git a/src/reflect/visiblefields_test.go b/src/reflect/visiblefields_test.go
index 2688b63091..915bbee867 100644
--- a/src/reflect/visiblefields_test.go
+++ b/src/reflect/visiblefields_test.go
@@ -1,3 +1,7 @@
+// Copyright 2021 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
 package reflect_test
 
 import (
diff --git a/src/regexp/find_test.go b/src/regexp/find_test.go
index 87c49b074f..64c2239d90 100644
--- a/src/regexp/find_test.go
+++ b/src/regexp/find_test.go
@@ -97,6 +97,7 @@ var findTests = []FindTest{
 	{`\B`, "xx", build(1, 1, 1)},
 	{`\B`, "x y", nil},
 	{`\B`, "xx yy", build(2, 1, 1, 4, 4)},
+	{`(|a)*`, "aa", build(3, 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2)},
 
 	// RE2 tests
 	{`[^\S\s]`, "abcd", nil},
diff --git a/src/regexp/onepass_test.go b/src/regexp/onepass_test.go
index 32264d5f1e..6a42eda391 100644
--- a/src/regexp/onepass_test.go
+++ b/src/regexp/onepass_test.go
@@ -142,7 +142,7 @@ var onePassTests = []struct {
 	{`^(?:(a)|(?:a*))$`, false},
 	{`^(?:(?:(?:.(?:$))?))$`, true},
 	{`^abcd$`, true},
-	{`^(?:(?:a{0,})*?)$`, true},
+	{`^(?:(?:a{0,})*?)$`, false},
 	{`^(?:(?:a+)*)$`, true},
 	{`^(?:(?:a|(?:aa)))$`, true},
 	{`^(?:[^\s\S])$`, true},
diff --git a/src/regexp/syntax/compile.go b/src/regexp/syntax/compile.go
index 7524d628fe..c9f9fa024b 100644
--- a/src/regexp/syntax/compile.go
+++ b/src/regexp/syntax/compile.go
@@ -57,8 +57,9 @@ func (l1 patchList) append(p *Prog, l2 patchList) patchList {
 
 // A frag represents a compiled program fragment.
 type frag struct {
-	i   uint32    // index of first instruction
-	out patchList // where to record end instruction
+	i        uint32    // index of first instruction
+	out      patchList // where to record end instruction
+	nullable bool      // whether fragment can match empty string
 }
 
 type compiler struct {
@@ -159,7 +160,7 @@ func (c *compiler) compile(re *Regexp) frag {
 
 func (c *compiler) inst(op InstOp) frag {
 	// TODO: impose length limit
-	f := frag{i: uint32(len(c.p.Inst))}
+	f := frag{i: uint32(len(c.p.Inst)), nullable: true}
 	c.p.Inst = append(c.p.Inst, Inst{Op: op})
 	return f
 }
@@ -194,7 +195,7 @@ func (c *compiler) cat(f1, f2 frag) frag {
 	// TODO: elide nop
 
 	f1.out.patch(c.p, f2.i)
-	return frag{f1.i, f2.out}
+	return frag{f1.i, f2.out, f1.nullable && f2.nullable}
 }
 
 func (c *compiler) alt(f1, f2 frag) frag {
@@ -211,6 +212,7 @@ func (c *compiler) alt(f1, f2 frag) frag {
 	i.Out = f1.i
 	i.Arg = f2.i
 	f.out = f1.out.append(c.p, f2.out)
+	f.nullable = f1.nullable || f2.nullable
 	return f
 }
 
@@ -228,7 +230,12 @@ func (c *compiler) quest(f1 frag, nongreedy bool) frag {
 	return f
 }
 
-func (c *compiler) star(f1 frag, nongreedy bool) frag {
+// loop returns the fragment for the main loop of a plus or star.
+// For plus, it can be used after changing the entry to f1.i.
+// For star, it can be used directly when f1 can't match an empty string.
+// (When f1 can match an empty string, f1* must be implemented as (f1+)?
+// to get the priority match order correct.)
+func (c *compiler) loop(f1 frag, nongreedy bool) frag {
 	f := c.inst(InstAlt)
 	i := &c.p.Inst[f.i]
 	if nongreedy {
@@ -242,8 +249,17 @@ func (c *compiler) star(f1 frag, nongreedy bool) frag {
 	return f
 }
 
+func (c *compiler) star(f1 frag, nongreedy bool) frag {
+	if f1.nullable {
+		// Use (f1+)? to get priority match order correct.
+		// See golang.org/issue/46123.
+		return c.quest(c.plus(f1, nongreedy), nongreedy)
+	}
+	return c.loop(f1, nongreedy)
+}
+
 func (c *compiler) plus(f1 frag, nongreedy bool) frag {
-	return frag{f1.i, c.star(f1, nongreedy).out}
+	return frag{f1.i, c.loop(f1, nongreedy).out, f1.nullable}
 }
 
 func (c *compiler) empty(op EmptyOp) frag {
@@ -255,6 +271,7 @@ func (c *compiler) empty(op EmptyOp) frag {
 
 func (c *compiler) rune(r []rune, flags Flags) frag {
 	f := c.inst(InstRune)
+	f.nullable = false
 	i := &c.p.Inst[f.i]
 	i.Rune = r
 	flags &= FoldCase // only relevant flag is FoldCase
diff --git a/src/regexp/syntax/prog_test.go b/src/regexp/syntax/prog_test.go
index 50bfa3d4be..5603aea228 100644
--- a/src/regexp/syntax/prog_test.go
+++ b/src/regexp/syntax/prog_test.go
@@ -88,6 +88,21 @@ var compileTests = []struct {
   1*	empty 4 -> 2
   2	anynotnl -> 3
   3	match
+`},
+	{"(?:|a)+", `  0	fail
+  1	nop -> 4
+  2	rune1 "a" -> 4
+  3*	alt -> 1, 2
+  4	alt -> 3, 5
+  5	match
+`},
+	{"(?:|a)*", `  0	fail
+  1	nop -> 4
+  2	rune1 "a" -> 4
+  3	alt -> 1, 2
+  4	alt -> 3, 6
+  5*	alt -> 3, 6
+  6	match
 `},
 }
 
diff --git a/src/regexp/testdata/basic.dat b/src/regexp/testdata/basic.dat
index 7859290ba1..1776b1ff96 100644
--- a/src/regexp/testdata/basic.dat
+++ b/src/regexp/testdata/basic.dat
@@ -124,24 +124,20 @@ E	((a))			abc		(0,1)(0,1)(0,1)
 E	(a)b(c)			abc		(0,3)(0,1)(2,3)
 E	a+b+c			aabbabc		(4,7)
 E	a*			aaa		(0,3)
-#E	(a*)*			-		(0,0)(0,0)
-E	(a*)*			-		(0,0)(?,?)	RE2/Go
+E	(a*)*			-		(0,0)(0,0)
 E	(a*)+			-		(0,0)(0,0)
-#E	(a*|b)*			-		(0,0)(0,0)
-E	(a*|b)*			-		(0,0)(?,?)	RE2/Go
+E	(a*|b)*			-		(0,0)(0,0)
 E	(a+|b)*			ab		(0,2)(1,2)
 E	(a+|b)+			ab		(0,2)(1,2)
 E	(a+|b)?			ab		(0,1)(0,1)
 BE	[^ab]*			cde		(0,3)
-#E	(^)*			-		(0,0)(0,0)
-E	(^)*			-		(0,0)(?,?)	RE2/Go
+E	(^)*			-		(0,0)(0,0)
 BE	a*			NULL		(0,0)
 E	([abc])*d		abbbcd		(0,6)(4,5)
 E	([abc])*bcd		abcd		(0,4)(0,1)
 E	a|b|c|d|e		e		(0,1)
 E	(a|b|c|d|e)f		ef		(0,2)(0,1)
-#E	((a*|b))*		-		(0,0)(0,0)(0,0)
-E	((a*|b))*		-		(0,0)(?,?)(?,?)	RE2/Go
+E	((a*|b))*		-		(0,0)(0,0)(0,0)
 BE	abcd*efg		abcdefg		(0,7)
 BE	ab*			xabyabbbz	(1,3)
 BE	ab*			xayabbbz	(1,2)
diff --git a/src/regexp/testdata/nullsubexpr.dat b/src/regexp/testdata/nullsubexpr.dat
index 2e18fbb917..68d9c99996 100644
--- a/src/regexp/testdata/nullsubexpr.dat
+++ b/src/regexp/testdata/nullsubexpr.dat
@@ -1,8 +1,7 @@
 NOTE	null subexpression matches : 2002-06-06
 
 E	(a*)*		a		(0,1)(0,1)
-#E	SAME		x		(0,0)(0,0)
-E	SAME		x		(0,0)(?,?)	RE2/Go
+E	SAME		x		(0,0)(0,0)
 E	SAME		aaaaaa		(0,6)(0,6)
 E	SAME		aaaaaax		(0,6)(0,6)
 E	(a*)+		a		(0,1)(0,1)
@@ -19,8 +18,7 @@ E	SAME		aaaaaa		(0,6)(0,6)
 E	SAME		aaaaaax		(0,6)(0,6)
 
 E	([a]*)*		a		(0,1)(0,1)
-#E	SAME		x		(0,0)(0,0)
-E	SAME		x		(0,0)(?,?)	RE2/Go
+E	SAME		x		(0,0)(0,0)
 E	SAME		aaaaaa		(0,6)(0,6)
 E	SAME		aaaaaax		(0,6)(0,6)
 E	([a]*)+		a		(0,1)(0,1)
@@ -28,8 +26,7 @@ E	SAME		x		(0,0)(0,0)
 E	SAME		aaaaaa		(0,6)(0,6)
 E	SAME		aaaaaax		(0,6)(0,6)
 E	([^b]*)*	a		(0,1)(0,1)
-#E	SAME		b		(0,0)(0,0)
-E	SAME		b		(0,0)(?,?)	RE2/Go
+E	SAME		b		(0,0)(0,0)
 E	SAME		aaaaaa		(0,6)(0,6)
 E	SAME		aaaaaab		(0,6)(0,6)
 E	([ab]*)*	a		(0,1)(0,1)
@@ -41,11 +38,9 @@ E	SAME		bbbbbb		(0,6)(0,6)
 E	SAME		aaaabcde	(0,5)(0,5)
 E	([^a]*)*	b		(0,1)(0,1)
 E	SAME		bbbbbb		(0,6)(0,6)
-#E	SAME		aaaaaa		(0,0)(0,0)
-E	SAME		aaaaaa		(0,0)(?,?)	RE2/Go
+E	SAME		aaaaaa		(0,0)(0,0)
 E	([^ab]*)*	ccccxx		(0,6)(0,6)
-#E	SAME		ababab		(0,0)(0,0)
-E	SAME		ababab		(0,0)(?,?)	RE2/Go
+E	SAME		ababab		(0,0)(0,0)
 
 E	((z)+|a)*	zabcde		(0,2)(1,2)
 
@@ -65,8 +60,7 @@ B	\(a*\)*\(x\)\(\1\)	axa	(0,3)(0,1)(1,2)(2,3)
 B	\(a*\)*\(x\)\(\1\)\(x\)	axax	(0,4)(0,1)(1,2)(2,3)(3,4)
 B	\(a*\)*\(x\)\(\1\)\(x\)	axxa	(0,3)(1,1)(1,2)(2,2)(2,3)
 
-#E	(a*)*(x)		x	(0,1)(0,0)(0,1)
-E	(a*)*(x)		x	(0,1)(?,?)(0,1)	RE2/Go
+E	(a*)*(x)		x	(0,1)(0,0)(0,1)
 E	(a*)*(x)		ax	(0,2)(0,1)(1,2)
 E	(a*)*(x)		axa	(0,2)(0,1)(1,2)
 
diff --git a/src/regexp/testdata/re2-exhaustive.txt.bz2 b/src/regexp/testdata/re2-exhaustive.txt.bz2
index a357f28016..6638476dec 100644
Binary files a/src/regexp/testdata/re2-exhaustive.txt.bz2 and b/src/regexp/testdata/re2-exhaustive.txt.bz2 differ
diff --git a/src/regexp/testdata/re2-search.txt b/src/regexp/testdata/re2-search.txt
index 4d02e9cebd..8c4098a4f1 100644
--- a/src/regexp/testdata/re2-search.txt
+++ b/src/regexp/testdata/re2-search.txt
@@ -1,5 +1,5 @@
 # RE2 basic search tests built by make log
-# Thu Sep 8 13:43:43 EDT 2011
+# Wed May 12 12:13:22 EDT 2021
 Regexp.SearchTests
 strings
 ""
@@ -227,22 +227,6 @@ regexps
 0-0;0-0;0-0;0-0
 strings
 ""
-""
-regexps
-"a*"
-0-0;0-0;0-0;0-0
-0-0;0-0;0-0;0-0
-"^(?:a*)$"
-0-0;0-0;0-0;0-0
-0-0;0-0;0-0;0-0
-"^(?:a*)"
-0-0;0-0;0-0;0-0
-0-0;0-0;0-0;0-0
-"(?:a*)$"
-0-0;0-0;0-0;0-0
-0-0;0-0;0-0;0-0
-strings
-""
 "xabcdx"
 regexps
 "ab|cd"
@@ -3651,6 +3635,86 @@ regexps
 0-1;0-1;0-1;0-1
 strings
 ""
+"a"
+regexps
+"a\\C+"
+-;-;-;-
+-;-;-;-
+"^(?:a\\C+)$"
+-;-;-;-
+-;-;-;-
+"^(?:a\\C+)"
+-;-;-;-
+-;-;-;-
+"(?:a\\C+)$"
+-;-;-;-
+-;-;-;-
+strings
+""
+"a"
+regexps
+"a\\C?"
+-;-;-;-
+0-1;0-1;0-1;0-1
+"^(?:a\\C?)$"
+-;-;-;-
+0-1;0-1;0-1;0-1
+"^(?:a\\C?)"
+-;-;-;-
+0-1;0-1;0-1;0-1
+"(?:a\\C?)$"
+-;-;-;-
+0-1;0-1;0-1;0-1
+strings
+""
+"a"
+regexps
+"a\\C*?"
+-;-;-;-
+0-1;0-1;0-1;0-1
+"^(?:a\\C*?)$"
+-;-;-;-
+0-1;0-1;0-1;0-1
+"^(?:a\\C*?)"
+-;-;-;-
+0-1;0-1;0-1;0-1
+"(?:a\\C*?)$"
+-;-;-;-
+0-1;0-1;0-1;0-1
+strings
+""
+"a"
+regexps
+"a\\C+?"
+-;-;-;-
+-;-;-;-
+"^(?:a\\C+?)$"
+-;-;-;-
+-;-;-;-
+"^(?:a\\C+?)"
+-;-;-;-
+-;-;-;-
+"(?:a\\C+?)$"
+-;-;-;-
+-;-;-;-
+strings
+""
+"a"
+regexps
+"a\\C??"
+-;-;-;-
+0-1;0-1;0-1;0-1
+"^(?:a\\C??)$"
+-;-;-;-
+0-1;0-1;0-1;0-1
+"^(?:a\\C??)"
+-;-;-;-
+0-1;0-1;0-1;0-1
+"(?:a\\C??)$"
+-;-;-;-
+0-1;0-1;0-1;0-1
+strings
+""
 "baba"
 regexps
 "a\\C*|ba\\C"
@@ -3666,7 +3730,50 @@ regexps
 -;-;-;-
 -;1-4;-;1-4
 strings
-"abc"
+""
+"Inc."
 regexps
-"a.*?c|a.*?b"
+"\\w*I\\w*"
+-;-;-;-
+-;0-3;-;0-3
+"^(?:\\w*I\\w*)$"
+-;-;-;-
+-;-;-;-
+"^(?:\\w*I\\w*)"
+-;-;-;-
+-;0-3;-;0-3
+"(?:\\w*I\\w*)$"
+-;-;-;-
+-;-;-;-
+strings
+""
+"aaa"
+regexps
+"(?:|a)*"
+0-0;0-0;0-0;0-0
+0-3;0-0;0-3;0-3
+"^(?:(?:|a)*)$"
+0-0;0-0;0-0;0-0
+0-3;0-3;0-3;0-3
+"^(?:(?:|a)*)"
+0-0;0-0;0-0;0-0
+0-3;0-0;0-3;0-3
+"(?:(?:|a)*)$"
+0-0;0-0;0-0;0-0
+0-3;0-3;0-3;0-3
+strings
+""
+"aaa"
+regexps
+"(?:|a)+"
+0-0;0-0;0-0;0-0
+0-3;0-0;0-3;0-3
+"^(?:(?:|a)+)$"
+0-0;0-0;0-0;0-0
+0-3;0-3;0-3;0-3
+"^(?:(?:|a)+)"
+0-0;0-0;0-0;0-0
+0-3;0-0;0-3;0-3
+"(?:(?:|a)+)$"
+0-0;0-0;0-0;0-0
 0-3;0-3;0-3;0-3
diff --git a/src/runtime/alg.go b/src/runtime/alg.go
index 1b3bf1180d..39c7426842 100644
--- a/src/runtime/alg.go
+++ b/src/runtime/alg.go
@@ -178,28 +178,11 @@ func typehash(t *_type, p unsafe.Pointer, h uintptr) uintptr {
 		return h
 	case kindStruct:
 		s := (*structtype)(unsafe.Pointer(t))
-		memStart := uintptr(0)
-		memEnd := uintptr(0)
 		for _, f := range s.fields {
-			if memEnd > memStart && (f.name.isBlank() || f.offset() != memEnd || f.typ.tflag&tflagRegularMemory == 0) {
-				// flush any pending regular memory hashing
-				h = memhash(add(p, memStart), h, memEnd-memStart)
-				memStart = memEnd
-			}
 			if f.name.isBlank() {
 				continue
 			}
-			if f.typ.tflag&tflagRegularMemory == 0 {
-				h = typehash(f.typ, add(p, f.offset()), h)
-				continue
-			}
-			if memStart == memEnd {
-				memStart = f.offset()
-			}
-			memEnd = f.offset() + f.typ.size
-		}
-		if memEnd > memStart {
-			h = memhash(add(p, memStart), h, memEnd-memStart)
+			h = typehash(f.typ, add(p, f.offset()), h)
 		}
 		return h
 	default:
diff --git a/src/runtime/asm_arm.s b/src/runtime/asm_arm.s
index e779fc8f84..6d3573d68f 100644
--- a/src/runtime/asm_arm.s
+++ b/src/runtime/asm_arm.s
@@ -142,6 +142,11 @@ TEXT runtime·rt0_go(SB),NOSPLIT|NOFRAME|TOPFRAME,$0
 
 	BL	runtime·emptyfunc(SB)	// fault if stack check is wrong
 
+#ifdef GOOS_openbsd
+	// Save g to TLS so that it is available from signal trampoline.
+	BL	runtime·save_g(SB)
+#endif
+
 	BL	runtime·_initcgo(SB)	// will clobber R0-R3
 
 	// update stackguard after _cgo_init
@@ -633,9 +638,13 @@ TEXT	·cgocallback(SB),NOSPLIT,$12-12
 	NO_LOCAL_POINTERS
 
 	// Load m and g from thread-local storage.
+#ifdef GOOS_openbsd
+	BL	runtime·load_g(SB)
+#else
 	MOVB	runtime·iscgo(SB), R0
 	CMP	$0, R0
 	BL.NE	runtime·load_g(SB)
+#endif
 
 	// If g is nil, Go did not create the current thread.
 	// Call needm to obtain one for temporary use.
@@ -744,6 +753,9 @@ TEXT setg<>(SB),NOSPLIT|NOFRAME,$0-0
 	// Save g to thread-local storage.
 #ifdef GOOS_windows
 	B	runtime·save_g(SB)
+#else
+#ifdef GOOS_openbsd
+	B	runtime·save_g(SB)
 #else
 	MOVB	runtime·iscgo(SB), R0
 	CMP	$0, R0
@@ -753,6 +765,7 @@ TEXT setg<>(SB),NOSPLIT|NOFRAME,$0-0
 	MOVW	g, R0
 	RET
 #endif
+#endif
 
 TEXT runtime·emptyfunc(SB),0,$0-0
 	RET
diff --git a/src/runtime/asm_mips64x.s b/src/runtime/asm_mips64x.s
index c3b57e472a..d4d2280105 100644
--- a/src/runtime/asm_mips64x.s
+++ b/src/runtime/asm_mips64x.s
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build mips64 || mips64le
 // +build mips64 mips64le
 
 #include "go_asm.h"
diff --git a/src/runtime/asm_mipsx.s b/src/runtime/asm_mipsx.s
index 1d828b03cf..ea7edf20cf 100644
--- a/src/runtime/asm_mipsx.s
+++ b/src/runtime/asm_mipsx.s
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build mips || mipsle
 // +build mips mipsle
 
 #include "go_asm.h"
diff --git a/src/runtime/asm_ppc64x.s b/src/runtime/asm_ppc64x.s
index 2c39b38912..942cc14f17 100644
--- a/src/runtime/asm_ppc64x.s
+++ b/src/runtime/asm_ppc64x.s
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build ppc64 || ppc64le
 // +build ppc64 ppc64le
 
 #include "go_asm.h"
diff --git a/src/runtime/atomic_mips64x.s b/src/runtime/atomic_mips64x.s
index 6f42412502..e2118e6a20 100644
--- a/src/runtime/atomic_mips64x.s
+++ b/src/runtime/atomic_mips64x.s
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build mips64 || mips64le
 // +build mips64 mips64le
 
 #include "textflag.h"
diff --git a/src/runtime/atomic_mipsx.s b/src/runtime/atomic_mipsx.s
index ed078a2d8a..1eacd273b4 100644
--- a/src/runtime/atomic_mipsx.s
+++ b/src/runtime/atomic_mipsx.s
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build mips || mipsle
 // +build mips mipsle
 
 #include "textflag.h"
diff --git a/src/runtime/atomic_ppc64x.s b/src/runtime/atomic_ppc64x.s
index 57f672f330..b63de2dbd3 100644
--- a/src/runtime/atomic_ppc64x.s
+++ b/src/runtime/atomic_ppc64x.s
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build ppc64 || ppc64le
 // +build ppc64 ppc64le
 
 #include "textflag.h"
diff --git a/src/runtime/cgo/asm_mips64x.s b/src/runtime/cgo/asm_mips64x.s
index e51cdf3d12..ba948071fa 100644
--- a/src/runtime/cgo/asm_mips64x.s
+++ b/src/runtime/cgo/asm_mips64x.s
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build mips64 || mips64le
 // +build mips64 mips64le
 
 #include "textflag.h"
diff --git a/src/runtime/cgo/asm_mipsx.s b/src/runtime/cgo/asm_mipsx.s
index 1127c8beb4..fd5d78ef97 100644
--- a/src/runtime/cgo/asm_mipsx.s
+++ b/src/runtime/cgo/asm_mipsx.s
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build mips || mipsle
 // +build mips mipsle
 
 #include "textflag.h"
diff --git a/src/runtime/cgo/asm_ppc64x.s b/src/runtime/cgo/asm_ppc64x.s
index f4efc1e67d..187b2d42f6 100644
--- a/src/runtime/cgo/asm_ppc64x.s
+++ b/src/runtime/cgo/asm_ppc64x.s
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build ppc64 || ppc64le
 // +build ppc64 ppc64le
 
 #include "textflag.h"
@@ -11,17 +12,20 @@
 // func crosscall2(fn, a unsafe.Pointer, n int32, ctxt uintptr)
 // Saves C callee-saved registers and calls cgocallback with three arguments.
 // fn is the PC of a func(a unsafe.Pointer) function.
+// The value of R2 is saved on the new stack frame, and not
+// the caller's frame due to issue #43228.
 TEXT crosscall2(SB),NOSPLIT|NOFRAME,$0
 	// Start with standard C stack frame layout and linkage
 	MOVD	LR, R0
 	MOVD	R0, 16(R1)	// Save LR in caller's frame
 	MOVW	CR, R0		// Save CR in caller's frame
-	MOVD	R0, 8(R1)
-	MOVD	R2, 24(R1)	// Save TOC in caller's frame
+	MOVW	R0, 8(R1)
 
 	BL	saveregs2<>(SB)
 
 	MOVDU	R1, (-288-3*8-FIXED_FRAME)(R1)
+	// Save the caller's R2
+	MOVD	R2, 24(R1)
 
 	// Initialize Go ABI environment
 	BL	runtime·reginit(SB)
@@ -40,12 +44,13 @@ TEXT crosscall2(SB),NOSPLIT|NOFRAME,$0
 	MOVD	R6, FIXED_FRAME+16(R1)	// ctxt uintptr
 	BL	runtime·cgocallback(SB)
 
+	// Restore the caller's R2
+	MOVD	24(R1), R2
 	ADD	$(288+3*8+FIXED_FRAME), R1
 
 	BL	restoreregs2<>(SB)
 
-	MOVD	24(R1), R2
-	MOVD	8(R1), R0
+	MOVW	8(R1), R0
 	MOVFL	R0, $0xff
 	MOVD	16(R1), R0
 	MOVD	R0, LR
diff --git a/src/runtime/cgo/asm_riscv64.s b/src/runtime/cgo/asm_riscv64.s
index b4ddbb020f..fcd1d36ca8 100644
--- a/src/runtime/cgo/asm_riscv64.s
+++ b/src/runtime/cgo/asm_riscv64.s
@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build riscv64
-
 #include "textflag.h"
 
 // Called by C code generated by cmd/cgo.
diff --git a/src/runtime/cgo/gcc_mmap.c b/src/runtime/cgo/gcc_mmap.c
index e6a621d5a3..698a7e3cd2 100644
--- a/src/runtime/cgo/gcc_mmap.c
+++ b/src/runtime/cgo/gcc_mmap.c
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build linux,amd64 linux,arm64
+// +build linux,amd64 linux,arm64 linux,ppc64le
 
 #include 
 #include 
diff --git a/src/runtime/cgo/gcc_sigaction.c b/src/runtime/cgo/gcc_sigaction.c
index 890008e327..dd283151f1 100644
--- a/src/runtime/cgo/gcc_sigaction.c
+++ b/src/runtime/cgo/gcc_sigaction.c
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build linux,amd64 linux,arm64
+// +build linux,amd64 linux,arm64 linux,ppc64le
 
 #include 
 #include 
diff --git a/src/runtime/cgo/sigaction.go b/src/runtime/cgo/sigaction.go
index ee63ea4c09..692fd2675f 100644
--- a/src/runtime/cgo/sigaction.go
+++ b/src/runtime/cgo/sigaction.go
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-//go:build (linux && amd64) || (freebsd && amd64) || (linux && arm64)
-// +build linux,amd64 freebsd,amd64 linux,arm64
+//go:build (linux && amd64) || (freebsd && amd64) || (linux && arm64) || (linux && ppc64le)
+// +build linux,amd64 freebsd,amd64 linux,arm64 linux,ppc64le
 
 package cgo
 
@@ -11,8 +11,8 @@ package cgo
 import _ "unsafe"
 
 // When using cgo, call the C library for sigaction, so that we call into
-// any sanitizer interceptors. This supports using the memory
-// sanitizer with Go programs. The memory sanitizer only applies to
+// any sanitizer interceptors. This supports using the sanitizers
+// with Go programs. The thread and memory sanitizers only apply to
 // C/C++ code; this permits that code to see the Go runtime's existing signal
 // handlers when registering new signal handlers for the process.
 
diff --git a/src/runtime/cgo_sigaction.go b/src/runtime/cgo_sigaction.go
index 15690ecb0b..6099d1b746 100644
--- a/src/runtime/cgo_sigaction.go
+++ b/src/runtime/cgo_sigaction.go
@@ -2,10 +2,10 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// Support for memory sanitizer. See runtime/cgo/sigaction.go.
+// Support for sanitizers. See runtime/cgo/sigaction.go.
 
-//go:build (linux && amd64) || (freebsd && amd64) || (linux && arm64)
-// +build linux,amd64 freebsd,amd64 linux,arm64
+//go:build (linux && amd64) || (freebsd && amd64) || (linux && arm64) || (linux && ppc64le)
+// +build linux,amd64 freebsd,amd64 linux,arm64 linux,ppc64le
 
 package runtime
 
diff --git a/src/runtime/cgocall.go b/src/runtime/cgocall.go
index 0e287d0b8e..2626216f95 100644
--- a/src/runtime/cgocall.go
+++ b/src/runtime/cgocall.go
@@ -110,6 +110,8 @@ func syscall_cgocaller(fn unsafe.Pointer, args ...uintptr) uintptr {
 	return as.retval
 }
 
+var ncgocall uint64 // number of cgo calls in total for dead m
+
 // Call from Go to C.
 //
 // This must be nosplit because it's used for syscalls on some
@@ -210,6 +212,8 @@ func cgocallbackg(fn, frame unsafe.Pointer, ctxt uintptr) {
 	// a different M. The call to unlockOSThread is in unwindm.
 	lockOSThread()
 
+	checkm := gp.m
+
 	// Save current syscall parameters, so m.syscall can be
 	// used again if callback decide to make syscall.
 	syscall := gp.m.syscall
@@ -225,15 +229,20 @@ func cgocallbackg(fn, frame unsafe.Pointer, ctxt uintptr) {
 
 	osPreemptExtExit(gp.m)
 
-	cgocallbackg1(fn, frame, ctxt)
+	cgocallbackg1(fn, frame, ctxt) // will call unlockOSThread
 
 	// At this point unlockOSThread has been called.
 	// The following code must not change to a different m.
 	// This is enforced by checking incgo in the schedule function.
 
+	gp.m.incgo = true
+
+	if gp.m != checkm {
+		throw("m changed unexpectedly in cgocallbackg")
+	}
+
 	osPreemptExtEnter(gp.m)
 
-	gp.m.incgo = true
 	// going back to cgo call
 	reentersyscall(savedpc, uintptr(savedsp))
 
@@ -242,6 +251,11 @@ func cgocallbackg(fn, frame unsafe.Pointer, ctxt uintptr) {
 
 func cgocallbackg1(fn, frame unsafe.Pointer, ctxt uintptr) {
 	gp := getg()
+
+	// When we return, undo the call to lockOSThread in cgocallbackg.
+	// We must still stay on the same m.
+	defer unlockOSThread()
+
 	if gp.m.needextram || atomic.Load(&extraMWaiters) > 0 {
 		gp.m.needextram = false
 		systemstack(newextram)
@@ -321,10 +335,6 @@ func unwindm(restore *bool) {
 
 		releasem(mp)
 	}
-
-	// Undo the call to lockOSThread in cgocallbackg.
-	// We must still stay on the same m.
-	unlockOSThread()
 }
 
 // called from assembly
diff --git a/src/runtime/checkptr.go b/src/runtime/checkptr.go
index 59891a06a5..2d4afd5cf6 100644
--- a/src/runtime/checkptr.go
+++ b/src/runtime/checkptr.go
@@ -7,6 +7,11 @@ package runtime
 import "unsafe"
 
 func checkptrAlignment(p unsafe.Pointer, elem *_type, n uintptr) {
+	// nil pointer is always suitably aligned (#47430).
+	if p == nil {
+		return
+	}
+
 	// Check that (*[n]elem)(p) is appropriately aligned.
 	// Note that we allow unaligned pointers if the types they point to contain
 	// no pointers themselves. See issue 37298.
@@ -16,11 +21,32 @@ func checkptrAlignment(p unsafe.Pointer, elem *_type, n uintptr) {
 	}
 
 	// Check that (*[n]elem)(p) doesn't straddle multiple heap objects.
-	if size := n * elem.size; size > 1 && checkptrBase(p) != checkptrBase(add(p, size-1)) {
+	// TODO(mdempsky): Fix #46938 so we don't need to worry about overflow here.
+	if checkptrStraddles(p, n*elem.size) {
 		throw("checkptr: converted pointer straddles multiple allocations")
 	}
 }
 
+// checkptrStraddles reports whether the first size-bytes of memory
+// addressed by ptr is known to straddle more than one Go allocation.
+func checkptrStraddles(ptr unsafe.Pointer, size uintptr) bool {
+	if size <= 1 {
+		return false
+	}
+
+	// Check that add(ptr, size-1) won't overflow. This avoids the risk
+	// of producing an illegal pointer value (assuming ptr is legal).
+	if uintptr(ptr) >= -(size - 1) {
+		return true
+	}
+	end := add(ptr, size-1)
+
+	// TODO(mdempsky): Detect when [ptr, end] contains Go allocations,
+	// but neither ptr nor end point into one themselves.
+
+	return checkptrBase(ptr) != checkptrBase(end)
+}
+
 func checkptrArithmetic(p unsafe.Pointer, originals []unsafe.Pointer) {
 	if 0 < uintptr(p) && uintptr(p) < minLegalPointer {
 		throw("checkptr: pointer arithmetic computed bad pointer value")
diff --git a/src/runtime/checkptr_test.go b/src/runtime/checkptr_test.go
index 194cc1243a..d5dd101adb 100644
--- a/src/runtime/checkptr_test.go
+++ b/src/runtime/checkptr_test.go
@@ -26,10 +26,13 @@ func TestCheckPtr(t *testing.T) {
 	}{
 		{"CheckPtrAlignmentPtr", "fatal error: checkptr: misaligned pointer conversion\n"},
 		{"CheckPtrAlignmentNoPtr", ""},
+		{"CheckPtrAlignmentNilPtr", ""},
 		{"CheckPtrArithmetic", "fatal error: checkptr: pointer arithmetic result points to invalid allocation\n"},
 		{"CheckPtrArithmetic2", "fatal error: checkptr: pointer arithmetic result points to invalid allocation\n"},
 		{"CheckPtrSize", "fatal error: checkptr: converted pointer straddles multiple allocations\n"},
 		{"CheckPtrSmall", "fatal error: checkptr: pointer arithmetic computed bad pointer value\n"},
+		{"CheckPtrSliceOK", ""},
+		{"CheckPtrSliceFail", "fatal error: checkptr: unsafe.Slice result straddles multiple allocations\n"},
 	}
 
 	for _, tc := range testCases {
diff --git a/src/runtime/crash_cgo_test.go b/src/runtime/crash_cgo_test.go
index 7d25c51aa2..5729942cee 100644
--- a/src/runtime/crash_cgo_test.go
+++ b/src/runtime/crash_cgo_test.go
@@ -282,6 +282,15 @@ func TestCgoTracebackContext(t *testing.T) {
 	}
 }
 
+func TestCgoTracebackContextPreemption(t *testing.T) {
+	t.Parallel()
+	got := runTestProg(t, "testprogcgo", "TracebackContextPreemption")
+	want := "OK\n"
+	if got != want {
+		t.Errorf("expected %q got %v", want, got)
+	}
+}
+
 func testCgoPprof(t *testing.T, buildArg, runArg, top, bottom string) {
 	t.Parallel()
 	if runtime.GOOS != "linux" || (runtime.GOARCH != "amd64" && runtime.GOARCH != "ppc64le") {
diff --git a/src/runtime/crash_test.go b/src/runtime/crash_test.go
index e5bd7973b7..e0c0bac892 100644
--- a/src/runtime/crash_test.go
+++ b/src/runtime/crash_test.go
@@ -470,14 +470,6 @@ func TestRecoverBeforePanicAfterGoexit2(t *testing.T) {
 }
 
 func TestNetpollDeadlock(t *testing.T) {
-	if os.Getenv("GO_BUILDER_NAME") == "darwin-amd64-10_12" {
-		// A suspected kernel bug in macOS 10.12 occasionally results in
-		// an apparent deadlock when dialing localhost. The errors have not
-		// been observed on newer versions of the OS, so we don't plan to work
-		// around them. See https://golang.org/issue/22019.
-		testenv.SkipFlaky(t, 22019)
-	}
-
 	t.Parallel()
 	output := runTestProg(t, "testprognet", "NetpollDeadlock")
 	want := "done\n"
diff --git a/src/runtime/crash_unix_test.go b/src/runtime/crash_unix_test.go
index 9469d5e6a6..694cc3d138 100644
--- a/src/runtime/crash_unix_test.go
+++ b/src/runtime/crash_unix_test.go
@@ -69,7 +69,8 @@ func TestCrashDumpsAllThreads(t *testing.T) {
 		t.Skipf("skipping; not supported on %v", runtime.GOOS)
 	}
 
-	if runtime.GOOS == "openbsd" && runtime.GOARCH == "mips64" {
+	if runtime.GOOS == "openbsd" && (runtime.GOARCH == "arm" || runtime.GOARCH == "mips64") {
+		// This may be ncpu < 2 related...
 		t.Skipf("skipping; test fails on %s/%s - see issue #42464", runtime.GOOS, runtime.GOARCH)
 	}
 
diff --git a/src/runtime/debug.go b/src/runtime/debug.go
index f411b22676..82deefa200 100644
--- a/src/runtime/debug.go
+++ b/src/runtime/debug.go
@@ -45,7 +45,7 @@ func NumCPU() int {
 
 // NumCgoCall returns the number of cgo calls made by the current process.
 func NumCgoCall() int64 {
-	var n int64
+	var n = int64(atomic.Load64(&ncgocall))
 	for mp := (*m)(atomic.Loadp(unsafe.Pointer(&allm))); mp != nil; mp = mp.alllink {
 		n += int64(mp.ncgocall)
 	}
diff --git a/src/runtime/debug/panic_test.go b/src/runtime/debug/panic_test.go
index b93631e1d8..65f9555f37 100644
--- a/src/runtime/debug/panic_test.go
+++ b/src/runtime/debug/panic_test.go
@@ -24,6 +24,9 @@ func TestPanicOnFault(t *testing.T) {
 	if runtime.GOOS == "ios" {
 		t.Skip("iOS doesn't provide fault addresses")
 	}
+	if runtime.GOOS == "netbsd" && runtime.GOARCH == "arm" {
+		t.Skip("netbsd-arm doesn't provide fault address (golang.org/issue/45026)")
+	}
 	m, err := syscall.Mmap(-1, 0, 0x1000, syscall.PROT_READ /* Note: no PROT_WRITE */, syscall.MAP_SHARED|syscall.MAP_ANON)
 	if err != nil {
 		t.Fatalf("can't map anonymous memory: %s", err)
diff --git a/src/runtime/defs_openbsd_arm.go b/src/runtime/defs_openbsd_arm.go
index 170bb3876c..6f128c4284 100644
--- a/src/runtime/defs_openbsd_arm.go
+++ b/src/runtime/defs_openbsd_arm.go
@@ -30,6 +30,13 @@ const (
 	_SA_RESTART = 0x2
 	_SA_ONSTACK = 0x1
 
+	_PTHREAD_CREATE_DETACHED = 0x1
+
+	_F_SETFD    = 0x2
+	_F_GETFL    = 0x3
+	_F_SETFL    = 0x4
+	_FD_CLOEXEC = 0x1
+
 	_SIGHUP    = 0x1
 	_SIGINT    = 0x2
 	_SIGQUIT   = 0x3
@@ -174,3 +181,10 @@ type keventt struct {
 	udata     *byte
 	pad_cgo_1 [4]byte
 }
+
+type pthread uintptr
+type pthreadattr uintptr
+type pthreadcond uintptr
+type pthreadcondattr uintptr
+type pthreadmutex uintptr
+type pthreadmutexattr uintptr
diff --git a/src/runtime/duff_mips64x.s b/src/runtime/duff_mips64x.s
index c4e04ccc9d..a897d7fd9b 100644
--- a/src/runtime/duff_mips64x.s
+++ b/src/runtime/duff_mips64x.s
@@ -2,6 +2,7 @@
 // Run go generate from src/runtime to update.
 // See mkduff.go for comments.
 
+//go:build mips64 || mips64le
 // +build mips64 mips64le
 
 #include "textflag.h"
diff --git a/src/runtime/duff_ppc64x.s b/src/runtime/duff_ppc64x.s
index d6b89ba940..d4e3b409d2 100644
--- a/src/runtime/duff_ppc64x.s
+++ b/src/runtime/duff_ppc64x.s
@@ -2,6 +2,7 @@
 // Run go generate from src/runtime to update.
 // See mkduff.go for comments.
 
+//go:build ppc64 || ppc64le
 // +build ppc64 ppc64le
 
 #include "textflag.h"
diff --git a/src/runtime/example_test.go b/src/runtime/example_test.go
index e4912a5158..dcb8f7798e 100644
--- a/src/runtime/example_test.go
+++ b/src/runtime/example_test.go
@@ -12,12 +12,15 @@ import (
 
 func ExampleFrames() {
 	c := func() {
-		// Ask runtime.Callers for up to 10 pcs, including runtime.Callers itself.
+		// Ask runtime.Callers for up to 10 PCs, including runtime.Callers itself.
 		pc := make([]uintptr, 10)
 		n := runtime.Callers(0, pc)
 		if n == 0 {
-			// No pcs available. Stop now.
-			// This can happen if the first argument to runtime.Callers is large.
+			// No PCs available. This can happen if the first argument to
+			// runtime.Callers is large.
+			//
+			// Return now to avoid processing the zero Frame that would
+			// otherwise be returned by frames.Next below.
 			return
 		}
 
@@ -25,9 +28,12 @@ func ExampleFrames() {
 		frames := runtime.CallersFrames(pc)
 
 		// Loop to get frames.
-		// A fixed number of pcs can expand to an indefinite number of Frames.
+		// A fixed number of PCs can expand to an indefinite number of Frames.
 		for {
 			frame, more := frames.Next()
+
+			// Process this frame.
+			//
 			// To keep this example's output stable
 			// even if there are changes in the testing package,
 			// stop unwinding when we leave package runtime.
@@ -35,6 +41,8 @@ func ExampleFrames() {
 				break
 			}
 			fmt.Printf("- more:%v | %s\n", more, frame.Function)
+
+			// Check whether there are more frames to process after this one.
 			if !more {
 				break
 			}
diff --git a/src/runtime/export_debug_regabiargs_off_test.go b/src/runtime/export_debug_regabiargs_off_test.go
index fce37ab4d1..5009003d27 100644
--- a/src/runtime/export_debug_regabiargs_off_test.go
+++ b/src/runtime/export_debug_regabiargs_off_test.go
@@ -3,8 +3,7 @@
 // license that can be found in the LICENSE file.
 
 //go:build amd64 && linux && !goexperiment.regabiargs
-// +build amd64,linux
-// +build !goexperiment.regabiargs
+// +build amd64,linux,!goexperiment.regabiargs
 
 package runtime
 
diff --git a/src/runtime/export_debug_regabiargs_on_test.go b/src/runtime/export_debug_regabiargs_on_test.go
index 3c65127e56..e1b72efd0f 100644
--- a/src/runtime/export_debug_regabiargs_on_test.go
+++ b/src/runtime/export_debug_regabiargs_on_test.go
@@ -3,8 +3,7 @@
 // license that can be found in the LICENSE file.
 
 //go:build amd64 && linux && goexperiment.regabiargs
-// +build amd64,linux
-// +build goexperiment.regabiargs
+// +build amd64,linux,goexperiment.regabiargs
 
 package runtime
 
diff --git a/src/runtime/export_test.go b/src/runtime/export_test.go
index a6fc1e4785..c8d01fbb15 100644
--- a/src/runtime/export_test.go
+++ b/src/runtime/export_test.go
@@ -1148,31 +1148,6 @@ func SemNwait(addr *uint32) uint32 {
 	return atomic.Load(&root.nwait)
 }
 
-// MapHashCheck computes the hash of the key k for the map m, twice.
-// Method 1 uses the built-in hasher for the map.
-// Method 2 uses the typehash function (the one used by reflect).
-// Returns the two hash values, which should always be equal.
-func MapHashCheck(m interface{}, k interface{}) (uintptr, uintptr) {
-	// Unpack m.
-	mt := (*maptype)(unsafe.Pointer(efaceOf(&m)._type))
-	mh := (*hmap)(efaceOf(&m).data)
-
-	// Unpack k.
-	kt := efaceOf(&k)._type
-	var p unsafe.Pointer
-	if isDirectIface(kt) {
-		q := efaceOf(&k).data
-		p = unsafe.Pointer(&q)
-	} else {
-		p = efaceOf(&k).data
-	}
-
-	// Compute the hash functions.
-	x := mt.hasher(noescape(p), uintptr(mh.hash0))
-	y := typehash(kt, noescape(p), uintptr(mh.hash0))
-	return x, y
-}
-
 // mspan wrapper for testing.
 //go:notinheap
 type MSpan mspan
diff --git a/src/runtime/hash_test.go b/src/runtime/hash_test.go
index 502383557b..7048874a71 100644
--- a/src/runtime/hash_test.go
+++ b/src/runtime/hash_test.go
@@ -8,7 +8,6 @@ import (
 	"fmt"
 	"math"
 	"math/rand"
-	"reflect"
 	. "runtime"
 	"strings"
 	"testing"
@@ -49,54 +48,6 @@ func TestMemHash64Equality(t *testing.T) {
 	}
 }
 
-func TestCompilerVsRuntimeHash(t *testing.T) {
-	// Test to make sure the compiler's hash function and the runtime's hash function agree.
-	// See issue 37716.
-	for _, m := range []interface{}{
-		map[bool]int{},
-		map[int8]int{},
-		map[uint8]int{},
-		map[int16]int{},
-		map[uint16]int{},
-		map[int32]int{},
-		map[uint32]int{},
-		map[int64]int{},
-		map[uint64]int{},
-		map[int]int{},
-		map[uint]int{},
-		map[uintptr]int{},
-		map[*byte]int{},
-		map[chan int]int{},
-		map[unsafe.Pointer]int{},
-		map[float32]int{},
-		map[float64]int{},
-		map[complex64]int{},
-		map[complex128]int{},
-		map[string]int{},
-		//map[interface{}]int{},
-		//map[interface{F()}]int{},
-		map[[8]uint64]int{},
-		map[[8]string]int{},
-		map[struct{ a, b, c, d int32 }]int{}, // Note: tests AMEM128
-		map[struct{ a, b, _, d int32 }]int{},
-		map[struct {
-			a, b int32
-			c    float32
-			d, e [8]byte
-		}]int{},
-		map[struct {
-			a int16
-			b int64
-		}]int{},
-	} {
-		k := reflect.New(reflect.TypeOf(m).Key()).Elem().Interface() // the zero key
-		x, y := MapHashCheck(m, k)
-		if x != y {
-			t.Errorf("hashes did not match (%x vs %x) for map %T", x, y, m)
-		}
-	}
-}
-
 // Smhasher is a torture test for hash functions.
 // https://code.google.com/p/smhasher/
 // This code is a port of some of the Smhasher tests to Go.
diff --git a/src/runtime/internal/atomic/atomic_386.s b/src/runtime/internal/atomic/atomic_386.s
index 37318e0ad7..724d515231 100644
--- a/src/runtime/internal/atomic/atomic_386.s
+++ b/src/runtime/internal/atomic/atomic_386.s
@@ -65,7 +65,7 @@ TEXT ·Xaddint64(SB), NOSPLIT, $0-20
 
 // bool ·Cas64(uint64 *val, uint64 old, uint64 new)
 // Atomically:
-//	if(*val == *old){
+//	if(*val == old){
 //		*val = new;
 //		return 1;
 //	} else {
diff --git a/src/runtime/internal/atomic/atomic_amd64.s b/src/runtime/internal/atomic/atomic_amd64.s
index 57cd59dd8c..d21514b36b 100644
--- a/src/runtime/internal/atomic/atomic_amd64.s
+++ b/src/runtime/internal/atomic/atomic_amd64.s
@@ -37,7 +37,7 @@ TEXT ·Cas(SB),NOSPLIT,$0-17
 
 // bool	·Cas64(uint64 *val, uint64 old, uint64 new)
 // Atomically:
-//	if(*val == *old){
+//	if(*val == old){
 //		*val = new;
 //		return 1;
 //	} else {
diff --git a/src/runtime/internal/atomic/atomic_arm64.go b/src/runtime/internal/atomic/atomic_arm64.go
index 131c687e1b..dbb1796ec0 100644
--- a/src/runtime/internal/atomic/atomic_arm64.go
+++ b/src/runtime/internal/atomic/atomic_arm64.go
@@ -7,7 +7,14 @@
 
 package atomic
 
-import "unsafe"
+import (
+	"internal/cpu"
+	"unsafe"
+)
+
+const (
+	offsetARM64HasATOMICS = unsafe.Offsetof(cpu.ARM64.HasATOMICS)
+)
 
 //go:noescape
 func Xadd(ptr *uint32, delta int32) uint32
diff --git a/src/runtime/internal/atomic/atomic_arm64.s b/src/runtime/internal/atomic/atomic_arm64.s
index 587e7f05e2..5f77d92deb 100644
--- a/src/runtime/internal/atomic/atomic_arm64.s
+++ b/src/runtime/internal/atomic/atomic_arm64.s
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+#include "go_asm.h"
 #include "textflag.h"
 
 TEXT ·Casint32(SB), NOSPLIT, $0-17
@@ -127,10 +128,15 @@ TEXT ·Store64(SB), NOSPLIT, $0-16
 TEXT ·Xchg(SB), NOSPLIT, $0-20
 	MOVD	ptr+0(FP), R0
 	MOVW	new+8(FP), R1
-again:
+	MOVBU	internal∕cpu·ARM64+const_offsetARM64HasATOMICS(SB), R4
+	CBZ 	R4, load_store_loop
+	SWPALW	R1, (R0), R2
+	MOVW	R2, ret+16(FP)
+	RET
+load_store_loop:
 	LDAXRW	(R0), R2
 	STLXRW	R1, (R0), R3
-	CBNZ	R3, again
+	CBNZ	R3, load_store_loop
 	MOVW	R2, ret+16(FP)
 	RET
 
@@ -142,10 +148,15 @@ again:
 TEXT ·Xchg64(SB), NOSPLIT, $0-24
 	MOVD	ptr+0(FP), R0
 	MOVD	new+8(FP), R1
-again:
+	MOVBU	internal∕cpu·ARM64+const_offsetARM64HasATOMICS(SB), R4
+	CBZ 	R4, load_store_loop
+	SWPALD	R1, (R0), R2
+	MOVD	R2, ret+16(FP)
+	RET
+load_store_loop:
 	LDAXR	(R0), R2
 	STLXR	R1, (R0), R3
-	CBNZ	R3, again
+	CBNZ	R3, load_store_loop
 	MOVD	R2, ret+16(FP)
 	RET
 
@@ -160,12 +171,20 @@ TEXT ·Cas(SB), NOSPLIT, $0-17
 	MOVD	ptr+0(FP), R0
 	MOVW	old+8(FP), R1
 	MOVW	new+12(FP), R2
-again:
+	MOVBU	internal∕cpu·ARM64+const_offsetARM64HasATOMICS(SB), R4
+	CBZ 	R4, load_store_loop
+	MOVD	R1, R3
+	CASALW	R3, (R0), R2
+	CMP 	R1, R3
+	CSET	EQ, R0
+	MOVB	R0, ret+16(FP)
+	RET
+load_store_loop:
 	LDAXRW	(R0), R3
 	CMPW	R1, R3
 	BNE	ok
 	STLXRW	R2, (R0), R3
-	CBNZ	R3, again
+	CBNZ	R3, load_store_loop
 ok:
 	CSET	EQ, R0
 	MOVB	R0, ret+16(FP)
@@ -173,7 +192,7 @@ ok:
 
 // bool ·Cas64(uint64 *ptr, uint64 old, uint64 new)
 // Atomically:
-//      if(*val == *old){
+//      if(*val == old){
 //              *val = new;
 //              return 1;
 //      } else {
@@ -183,12 +202,20 @@ TEXT ·Cas64(SB), NOSPLIT, $0-25
 	MOVD	ptr+0(FP), R0
 	MOVD	old+8(FP), R1
 	MOVD	new+16(FP), R2
-again:
+	MOVBU	internal∕cpu·ARM64+const_offsetARM64HasATOMICS(SB), R4
+	CBZ 	R4, load_store_loop
+	MOVD	R1, R3
+	CASALD	R3, (R0), R2
+	CMP 	R1, R3
+	CSET	EQ, R0
+	MOVB	R0, ret+24(FP)
+	RET
+load_store_loop:
 	LDAXR	(R0), R3
 	CMP	R1, R3
 	BNE	ok
 	STLXR	R2, (R0), R3
-	CBNZ	R3, again
+	CBNZ	R3, load_store_loop
 ok:
 	CSET	EQ, R0
 	MOVB	R0, ret+24(FP)
@@ -201,11 +228,17 @@ ok:
 TEXT ·Xadd(SB), NOSPLIT, $0-20
 	MOVD	ptr+0(FP), R0
 	MOVW	delta+8(FP), R1
-again:
+	MOVBU	internal∕cpu·ARM64+const_offsetARM64HasATOMICS(SB), R4
+	CBZ 	R4, load_store_loop
+	LDADDALW	R1, (R0), R2
+	ADD 	R1, R2
+	MOVW	R2, ret+16(FP)
+	RET
+load_store_loop:
 	LDAXRW	(R0), R2
 	ADDW	R2, R1, R2
 	STLXRW	R2, (R0), R3
-	CBNZ	R3, again
+	CBNZ	R3, load_store_loop
 	MOVW	R2, ret+16(FP)
 	RET
 
@@ -216,11 +249,17 @@ again:
 TEXT ·Xadd64(SB), NOSPLIT, $0-24
 	MOVD	ptr+0(FP), R0
 	MOVD	delta+8(FP), R1
-again:
+	MOVBU	internal∕cpu·ARM64+const_offsetARM64HasATOMICS(SB), R4
+	CBZ 	R4, load_store_loop
+	LDADDALD	R1, (R0), R2
+	ADD 	R1, R2
+	MOVD	R2, ret+16(FP)
+	RET
+load_store_loop:
 	LDAXR	(R0), R2
 	ADD	R2, R1, R2
 	STLXR	R2, (R0), R3
-	CBNZ	R3, again
+	CBNZ	R3, load_store_loop
 	MOVD	R2, ret+16(FP)
 	RET
 
@@ -236,37 +275,59 @@ TEXT ·Xchguintptr(SB), NOSPLIT, $0-24
 TEXT ·And8(SB), NOSPLIT, $0-9
 	MOVD	ptr+0(FP), R0
 	MOVB	val+8(FP), R1
+	MOVBU	internal∕cpu·ARM64+const_offsetARM64HasATOMICS(SB), R4
+	CBZ 	R4, load_store_loop
+	MVN 	R1, R2
+	LDCLRALB	R2, (R0), R3
+	RET
+load_store_loop:
 	LDAXRB	(R0), R2
 	AND	R1, R2
 	STLXRB	R2, (R0), R3
-	CBNZ	R3, -3(PC)
+	CBNZ	R3, load_store_loop
 	RET
 
 TEXT ·Or8(SB), NOSPLIT, $0-9
 	MOVD	ptr+0(FP), R0
 	MOVB	val+8(FP), R1
+	MOVBU	internal∕cpu·ARM64+const_offsetARM64HasATOMICS(SB), R4
+	CBZ 	R4, load_store_loop
+	LDORALB	R1, (R0), R2
+	RET
+load_store_loop:
 	LDAXRB	(R0), R2
 	ORR	R1, R2
 	STLXRB	R2, (R0), R3
-	CBNZ	R3, -3(PC)
+	CBNZ	R3, load_store_loop
 	RET
 
 // func And(addr *uint32, v uint32)
 TEXT ·And(SB), NOSPLIT, $0-12
 	MOVD	ptr+0(FP), R0
 	MOVW	val+8(FP), R1
+	MOVBU	internal∕cpu·ARM64+const_offsetARM64HasATOMICS(SB), R4
+	CBZ 	R4, load_store_loop
+	MVN 	R1, R2
+	LDCLRALW	R2, (R0), R3
+	RET
+load_store_loop:
 	LDAXRW	(R0), R2
 	AND	R1, R2
 	STLXRW	R2, (R0), R3
-	CBNZ	R3, -3(PC)
+	CBNZ	R3, load_store_loop
 	RET
 
 // func Or(addr *uint32, v uint32)
 TEXT ·Or(SB), NOSPLIT, $0-12
 	MOVD	ptr+0(FP), R0
 	MOVW	val+8(FP), R1
+	MOVBU	internal∕cpu·ARM64+const_offsetARM64HasATOMICS(SB), R4
+	CBZ 	R4, load_store_loop
+	LDORALW	R1, (R0), R2
+	RET
+load_store_loop:
 	LDAXRW	(R0), R2
 	ORR	R1, R2
 	STLXRW	R2, (R0), R3
-	CBNZ	R3, -3(PC)
+	CBNZ	R3, load_store_loop
 	RET
diff --git a/src/runtime/internal/atomic/atomic_mips64x.s b/src/runtime/internal/atomic/atomic_mips64x.s
index 2751c6f808..fedfc4a175 100644
--- a/src/runtime/internal/atomic/atomic_mips64x.s
+++ b/src/runtime/internal/atomic/atomic_mips64x.s
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build mips64 || mips64le
 // +build mips64 mips64le
 
 #include "textflag.h"
@@ -36,7 +37,7 @@ cas_fail:
 
 // bool	cas64(uint64 *ptr, uint64 old, uint64 new)
 // Atomically:
-//	if(*val == *old){
+//	if(*val == old){
 //		*val = new;
 //		return 1;
 //	} else {
diff --git a/src/runtime/internal/atomic/atomic_mipsx.s b/src/runtime/internal/atomic/atomic_mipsx.s
index 3f61321450..c0835d66ed 100644
--- a/src/runtime/internal/atomic/atomic_mipsx.s
+++ b/src/runtime/internal/atomic/atomic_mipsx.s
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build mips || mipsle
 // +build mips mipsle
 
 #include "textflag.h"
diff --git a/src/runtime/internal/atomic/atomic_ppc64x.s b/src/runtime/internal/atomic/atomic_ppc64x.s
index 37c8515d37..226b3b6216 100644
--- a/src/runtime/internal/atomic/atomic_ppc64x.s
+++ b/src/runtime/internal/atomic/atomic_ppc64x.s
@@ -2,11 +2,11 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build ppc64 || ppc64le
 // +build ppc64 ppc64le
 
 #include "textflag.h"
 
-
 // For more details about how various memory models are
 // enforced on POWER, the following paper provides more
 // details about how they enforce C/C++ like models. This
@@ -107,7 +107,7 @@ cas_fail:
 
 // bool	·Cas64(uint64 *ptr, uint64 old, uint64 new)
 // Atomically:
-//	if(*val == *old){
+//	if(*val == old){
 //		*val = new;
 //		return 1;
 //	} else {
diff --git a/src/runtime/internal/atomic/atomic_riscv64.s b/src/runtime/internal/atomic/atomic_riscv64.s
index ec05302a78..21d5adcdbc 100644
--- a/src/runtime/internal/atomic/atomic_riscv64.s
+++ b/src/runtime/internal/atomic/atomic_riscv64.s
@@ -30,8 +30,9 @@
 
 #include "textflag.h"
 
+// func Cas(ptr *uint64, old, new uint64) bool
 // Atomically:
-//      if(*val == *old){
+//      if(*val == old){
 //              *val = new;
 //              return 1;
 //      } else {
diff --git a/src/runtime/internal/atomic/sys_nonlinux_arm.s b/src/runtime/internal/atomic/sys_nonlinux_arm.s
index 57568b2238..04036ca970 100644
--- a/src/runtime/internal/atomic/sys_nonlinux_arm.s
+++ b/src/runtime/internal/atomic/sys_nonlinux_arm.s
@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build !linux,arm
+//go:build !linux
+// +build !linux
 
 #include "textflag.h"
 
diff --git a/src/runtime/internal/sys/gengoos.go b/src/runtime/internal/sys/gengoos.go
index 51f64a6e5c..ffe962f71d 100644
--- a/src/runtime/internal/sys/gengoos.go
+++ b/src/runtime/internal/sys/gengoos.go
@@ -48,18 +48,21 @@ func main() {
 		if target == "nacl" {
 			continue
 		}
-		var buf bytes.Buffer
-		fmt.Fprintf(&buf, "// Code generated by gengoos.go using 'go generate'. DO NOT EDIT.\n\n")
+		var tags []string
 		if target == "linux" {
-			fmt.Fprintf(&buf, "// +build !android\n") // must explicitly exclude android for linux
+			tags = append(tags, "!android") // must explicitly exclude android for linux
 		}
 		if target == "solaris" {
-			fmt.Fprintf(&buf, "// +build !illumos\n") // must explicitly exclude illumos for solaris
+			tags = append(tags, "!illumos") // must explicitly exclude illumos for solaris
 		}
 		if target == "darwin" {
-			fmt.Fprintf(&buf, "// +build !ios\n") // must explicitly exclude ios for darwin
+			tags = append(tags, "!ios") // must explicitly exclude ios for darwin
 		}
-		fmt.Fprintf(&buf, "// +build %s\n\n", target) // must explicitly include target for bootstrapping purposes
+		tags = append(tags, target) // must explicitly include target for bootstrapping purposes
+		var buf bytes.Buffer
+		fmt.Fprintf(&buf, "// Code generated by gengoos.go using 'go generate'. DO NOT EDIT.\n\n")
+		fmt.Fprintf(&buf, "//go:build %s\n", strings.Join(tags, " && "))
+		fmt.Fprintf(&buf, "// +build %s\n\n", strings.Join(tags, ","))
 		fmt.Fprintf(&buf, "package sys\n\n")
 		fmt.Fprintf(&buf, "const GOOS = `%s`\n\n", target)
 		for _, goos := range gooses {
@@ -81,6 +84,7 @@ func main() {
 		}
 		var buf bytes.Buffer
 		fmt.Fprintf(&buf, "// Code generated by gengoos.go using 'go generate'. DO NOT EDIT.\n\n")
+		fmt.Fprintf(&buf, "//go:build %s\n", target)
 		fmt.Fprintf(&buf, "// +build %s\n\n", target) // must explicitly include target for bootstrapping purposes
 		fmt.Fprintf(&buf, "package sys\n\n")
 		fmt.Fprintf(&buf, "const GOARCH = `%s`\n\n", target)
diff --git a/src/runtime/internal/sys/zgoarch_386.go b/src/runtime/internal/sys/zgoarch_386.go
index 98a2401bfe..5b189e7e73 100644
--- a/src/runtime/internal/sys/zgoarch_386.go
+++ b/src/runtime/internal/sys/zgoarch_386.go
@@ -16,6 +16,7 @@ const GoarchArm64 = 0
 const GoarchArm64be = 0
 const GoarchPpc64 = 0
 const GoarchPpc64le = 0
+const GoarchLoong64 = 0
 const GoarchMips = 0
 const GoarchMipsle = 0
 const GoarchMips64 = 0
diff --git a/src/runtime/internal/sys/zgoarch_amd64.go b/src/runtime/internal/sys/zgoarch_amd64.go
index d8faa5c786..312977d079 100644
--- a/src/runtime/internal/sys/zgoarch_amd64.go
+++ b/src/runtime/internal/sys/zgoarch_amd64.go
@@ -16,6 +16,7 @@ const GoarchArm64 = 0
 const GoarchArm64be = 0
 const GoarchPpc64 = 0
 const GoarchPpc64le = 0
+const GoarchLoong64 = 0
 const GoarchMips = 0
 const GoarchMipsle = 0
 const GoarchMips64 = 0
diff --git a/src/runtime/internal/sys/zgoarch_arm.go b/src/runtime/internal/sys/zgoarch_arm.go
index b64a69c9b4..5781870324 100644
--- a/src/runtime/internal/sys/zgoarch_arm.go
+++ b/src/runtime/internal/sys/zgoarch_arm.go
@@ -16,6 +16,7 @@ const GoarchArm64 = 0
 const GoarchArm64be = 0
 const GoarchPpc64 = 0
 const GoarchPpc64le = 0
+const GoarchLoong64 = 0
 const GoarchMips = 0
 const GoarchMipsle = 0
 const GoarchMips64 = 0
diff --git a/src/runtime/internal/sys/zgoarch_arm64.go b/src/runtime/internal/sys/zgoarch_arm64.go
index de6f85347b..f72a1f2161 100644
--- a/src/runtime/internal/sys/zgoarch_arm64.go
+++ b/src/runtime/internal/sys/zgoarch_arm64.go
@@ -16,6 +16,7 @@ const GoarchArm64 = 1
 const GoarchArm64be = 0
 const GoarchPpc64 = 0
 const GoarchPpc64le = 0
+const GoarchLoong64 = 0
 const GoarchMips = 0
 const GoarchMipsle = 0
 const GoarchMips64 = 0
diff --git a/src/runtime/internal/sys/zgoarch_arm64be.go b/src/runtime/internal/sys/zgoarch_arm64be.go
index b762bb069f..e805646058 100644
--- a/src/runtime/internal/sys/zgoarch_arm64be.go
+++ b/src/runtime/internal/sys/zgoarch_arm64be.go
@@ -16,6 +16,7 @@ const GoarchArm64 = 0
 const GoarchArm64be = 1
 const GoarchPpc64 = 0
 const GoarchPpc64le = 0
+const GoarchLoong64 = 0
 const GoarchMips = 0
 const GoarchMipsle = 0
 const GoarchMips64 = 0
diff --git a/src/runtime/internal/sys/zgoarch_armbe.go b/src/runtime/internal/sys/zgoarch_armbe.go
index e5297e4b16..d8d4e56d9a 100644
--- a/src/runtime/internal/sys/zgoarch_armbe.go
+++ b/src/runtime/internal/sys/zgoarch_armbe.go
@@ -16,6 +16,7 @@ const GoarchArm64 = 0
 const GoarchArm64be = 0
 const GoarchPpc64 = 0
 const GoarchPpc64le = 0
+const GoarchLoong64 = 0
 const GoarchMips = 0
 const GoarchMipsle = 0
 const GoarchMips64 = 0
diff --git a/src/runtime/internal/sys/zgoarch_loong64.go b/src/runtime/internal/sys/zgoarch_loong64.go
new file mode 100644
index 0000000000..6f35eb44a3
--- /dev/null
+++ b/src/runtime/internal/sys/zgoarch_loong64.go
@@ -0,0 +1,33 @@
+// Code generated by gengoos.go using 'go generate'. DO NOT EDIT.
+
+//go:build loong64
+// +build loong64
+
+package sys
+
+const GOARCH = `loong64`
+
+const Goarch386 = 0
+const GoarchAmd64 = 0
+const GoarchAmd64p32 = 0
+const GoarchArm = 0
+const GoarchArmbe = 0
+const GoarchArm64 = 0
+const GoarchArm64be = 0
+const GoarchPpc64 = 0
+const GoarchPpc64le = 0
+const GoarchLoong64 = 1
+const GoarchMips = 0
+const GoarchMipsle = 0
+const GoarchMips64 = 0
+const GoarchMips64le = 0
+const GoarchMips64p32 = 0
+const GoarchMips64p32le = 0
+const GoarchPpc = 0
+const GoarchRiscv = 0
+const GoarchRiscv64 = 0
+const GoarchS390 = 0
+const GoarchS390x = 0
+const GoarchSparc = 0
+const GoarchSparc64 = 0
+const GoarchWasm = 0
diff --git a/src/runtime/internal/sys/zgoarch_mips.go b/src/runtime/internal/sys/zgoarch_mips.go
index b5f4ed390c..bd58a92a0e 100644
--- a/src/runtime/internal/sys/zgoarch_mips.go
+++ b/src/runtime/internal/sys/zgoarch_mips.go
@@ -16,6 +16,7 @@ const GoarchArm64 = 0
 const GoarchArm64be = 0
 const GoarchPpc64 = 0
 const GoarchPpc64le = 0
+const GoarchLoong64 = 0
 const GoarchMips = 1
 const GoarchMipsle = 0
 const GoarchMips64 = 0
diff --git a/src/runtime/internal/sys/zgoarch_mips64.go b/src/runtime/internal/sys/zgoarch_mips64.go
index 73777cceb2..8e4a3dcd52 100644
--- a/src/runtime/internal/sys/zgoarch_mips64.go
+++ b/src/runtime/internal/sys/zgoarch_mips64.go
@@ -16,6 +16,7 @@ const GoarchArm64 = 0
 const GoarchArm64be = 0
 const GoarchPpc64 = 0
 const GoarchPpc64le = 0
+const GoarchLoong64 = 0
 const GoarchMips = 0
 const GoarchMipsle = 0
 const GoarchMips64 = 1
diff --git a/src/runtime/internal/sys/zgoarch_mips64le.go b/src/runtime/internal/sys/zgoarch_mips64le.go
index 0c81c36c09..d8e00339ea 100644
--- a/src/runtime/internal/sys/zgoarch_mips64le.go
+++ b/src/runtime/internal/sys/zgoarch_mips64le.go
@@ -16,6 +16,7 @@ const GoarchArm64 = 0
 const GoarchArm64be = 0
 const GoarchPpc64 = 0
 const GoarchPpc64le = 0
+const GoarchLoong64 = 0
 const GoarchMips = 0
 const GoarchMipsle = 0
 const GoarchMips64 = 0
diff --git a/src/runtime/internal/sys/zgoarch_mips64p32.go b/src/runtime/internal/sys/zgoarch_mips64p32.go
index d63ce27d24..8549cc0ba3 100644
--- a/src/runtime/internal/sys/zgoarch_mips64p32.go
+++ b/src/runtime/internal/sys/zgoarch_mips64p32.go
@@ -16,6 +16,7 @@ const GoarchArm64 = 0
 const GoarchArm64be = 0
 const GoarchPpc64 = 0
 const GoarchPpc64le = 0
+const GoarchLoong64 = 0
 const GoarchMips = 0
 const GoarchMipsle = 0
 const GoarchMips64 = 0
diff --git a/src/runtime/internal/sys/zgoarch_mips64p32le.go b/src/runtime/internal/sys/zgoarch_mips64p32le.go
index 2d577890b2..667b6fe514 100644
--- a/src/runtime/internal/sys/zgoarch_mips64p32le.go
+++ b/src/runtime/internal/sys/zgoarch_mips64p32le.go
@@ -16,6 +16,7 @@ const GoarchArm64 = 0
 const GoarchArm64be = 0
 const GoarchPpc64 = 0
 const GoarchPpc64le = 0
+const GoarchLoong64 = 0
 const GoarchMips = 0
 const GoarchMipsle = 0
 const GoarchMips64 = 0
diff --git a/src/runtime/internal/sys/zgoarch_mipsle.go b/src/runtime/internal/sys/zgoarch_mipsle.go
index 8af919d03a..8bedb2bb90 100644
--- a/src/runtime/internal/sys/zgoarch_mipsle.go
+++ b/src/runtime/internal/sys/zgoarch_mipsle.go
@@ -16,6 +16,7 @@ const GoarchArm64 = 0
 const GoarchArm64be = 0
 const GoarchPpc64 = 0
 const GoarchPpc64le = 0
+const GoarchLoong64 = 0
 const GoarchMips = 0
 const GoarchMipsle = 1
 const GoarchMips64 = 0
diff --git a/src/runtime/internal/sys/zgoarch_ppc.go b/src/runtime/internal/sys/zgoarch_ppc.go
index f6f12a5ddc..fe2196a327 100644
--- a/src/runtime/internal/sys/zgoarch_ppc.go
+++ b/src/runtime/internal/sys/zgoarch_ppc.go
@@ -16,6 +16,7 @@ const GoarchArm64 = 0
 const GoarchArm64be = 0
 const GoarchPpc64 = 0
 const GoarchPpc64le = 0
+const GoarchLoong64 = 0
 const GoarchMips = 0
 const GoarchMipsle = 0
 const GoarchMips64 = 0
diff --git a/src/runtime/internal/sys/zgoarch_ppc64.go b/src/runtime/internal/sys/zgoarch_ppc64.go
index a8379601f4..bd7cc43de3 100644
--- a/src/runtime/internal/sys/zgoarch_ppc64.go
+++ b/src/runtime/internal/sys/zgoarch_ppc64.go
@@ -16,6 +16,7 @@ const GoarchArm64 = 0
 const GoarchArm64be = 0
 const GoarchPpc64 = 1
 const GoarchPpc64le = 0
+const GoarchLoong64 = 0
 const GoarchMips = 0
 const GoarchMipsle = 0
 const GoarchMips64 = 0
diff --git a/src/runtime/internal/sys/zgoarch_ppc64le.go b/src/runtime/internal/sys/zgoarch_ppc64le.go
index f2ec5dcba7..e101892401 100644
--- a/src/runtime/internal/sys/zgoarch_ppc64le.go
+++ b/src/runtime/internal/sys/zgoarch_ppc64le.go
@@ -16,6 +16,7 @@ const GoarchArm64 = 0
 const GoarchArm64be = 0
 const GoarchPpc64 = 0
 const GoarchPpc64le = 1
+const GoarchLoong64 = 0
 const GoarchMips = 0
 const GoarchMipsle = 0
 const GoarchMips64 = 0
diff --git a/src/runtime/internal/sys/zgoarch_riscv.go b/src/runtime/internal/sys/zgoarch_riscv.go
index 83a3312f5f..559f86071a 100644
--- a/src/runtime/internal/sys/zgoarch_riscv.go
+++ b/src/runtime/internal/sys/zgoarch_riscv.go
@@ -16,6 +16,7 @@ const GoarchArm64 = 0
 const GoarchArm64be = 0
 const GoarchPpc64 = 0
 const GoarchPpc64le = 0
+const GoarchLoong64 = 0
 const GoarchMips = 0
 const GoarchMipsle = 0
 const GoarchMips64 = 0
diff --git a/src/runtime/internal/sys/zgoarch_riscv64.go b/src/runtime/internal/sys/zgoarch_riscv64.go
index 1dfcc84997..8485a94b3d 100644
--- a/src/runtime/internal/sys/zgoarch_riscv64.go
+++ b/src/runtime/internal/sys/zgoarch_riscv64.go
@@ -16,6 +16,7 @@ const GoarchArm64 = 0
 const GoarchArm64be = 0
 const GoarchPpc64 = 0
 const GoarchPpc64le = 0
+const GoarchLoong64 = 0
 const GoarchMips = 0
 const GoarchMipsle = 0
 const GoarchMips64 = 0
diff --git a/src/runtime/internal/sys/zgoarch_s390.go b/src/runtime/internal/sys/zgoarch_s390.go
index 91aba5a0f6..4c4569e376 100644
--- a/src/runtime/internal/sys/zgoarch_s390.go
+++ b/src/runtime/internal/sys/zgoarch_s390.go
@@ -16,6 +16,7 @@ const GoarchArm64 = 0
 const GoarchArm64be = 0
 const GoarchPpc64 = 0
 const GoarchPpc64le = 0
+const GoarchLoong64 = 0
 const GoarchMips = 0
 const GoarchMipsle = 0
 const GoarchMips64 = 0
diff --git a/src/runtime/internal/sys/zgoarch_s390x.go b/src/runtime/internal/sys/zgoarch_s390x.go
index edce50234e..e50d2edbb5 100644
--- a/src/runtime/internal/sys/zgoarch_s390x.go
+++ b/src/runtime/internal/sys/zgoarch_s390x.go
@@ -16,6 +16,7 @@ const GoarchArm64 = 0
 const GoarchArm64be = 0
 const GoarchPpc64 = 0
 const GoarchPpc64le = 0
+const GoarchLoong64 = 0
 const GoarchMips = 0
 const GoarchMipsle = 0
 const GoarchMips64 = 0
diff --git a/src/runtime/internal/sys/zgoarch_sparc.go b/src/runtime/internal/sys/zgoarch_sparc.go
index 5ae9560ab0..0d08752c7b 100644
--- a/src/runtime/internal/sys/zgoarch_sparc.go
+++ b/src/runtime/internal/sys/zgoarch_sparc.go
@@ -16,6 +16,7 @@ const GoarchArm64 = 0
 const GoarchArm64be = 0
 const GoarchPpc64 = 0
 const GoarchPpc64le = 0
+const GoarchLoong64 = 0
 const GoarchMips = 0
 const GoarchMipsle = 0
 const GoarchMips64 = 0
diff --git a/src/runtime/internal/sys/zgoarch_sparc64.go b/src/runtime/internal/sys/zgoarch_sparc64.go
index e2a0134aff..ba405bbf35 100644
--- a/src/runtime/internal/sys/zgoarch_sparc64.go
+++ b/src/runtime/internal/sys/zgoarch_sparc64.go
@@ -16,6 +16,7 @@ const GoarchArm64 = 0
 const GoarchArm64be = 0
 const GoarchPpc64 = 0
 const GoarchPpc64le = 0
+const GoarchLoong64 = 0
 const GoarchMips = 0
 const GoarchMipsle = 0
 const GoarchMips64 = 0
diff --git a/src/runtime/internal/sys/zgoarch_wasm.go b/src/runtime/internal/sys/zgoarch_wasm.go
index 52e85dea37..7c3e5afd1e 100644
--- a/src/runtime/internal/sys/zgoarch_wasm.go
+++ b/src/runtime/internal/sys/zgoarch_wasm.go
@@ -16,6 +16,7 @@ const GoarchArm64 = 0
 const GoarchArm64be = 0
 const GoarchPpc64 = 0
 const GoarchPpc64le = 0
+const GoarchLoong64 = 0
 const GoarchMips = 0
 const GoarchMipsle = 0
 const GoarchMips64 = 0
diff --git a/src/runtime/libfuzzer_amd64.s b/src/runtime/libfuzzer_amd64.s
index 890fde341b..13645fc7af 100644
--- a/src/runtime/libfuzzer_amd64.s
+++ b/src/runtime/libfuzzer_amd64.s
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build libfuzzer
 // +build libfuzzer
 
 #include "go_asm.h"
diff --git a/src/runtime/libfuzzer_arm64.s b/src/runtime/libfuzzer_arm64.s
index 121673e092..4ad8242804 100644
--- a/src/runtime/libfuzzer_arm64.s
+++ b/src/runtime/libfuzzer_arm64.s
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build libfuzzer
 // +build libfuzzer
 
 #include "go_asm.h"
diff --git a/src/runtime/malloc.go b/src/runtime/malloc.go
index 81e5225883..cc22b0f276 100644
--- a/src/runtime/malloc.go
+++ b/src/runtime/malloc.go
@@ -296,7 +296,7 @@ const (
 	// high addresses if viewed as unsigned).
 	//
 	// On aix/ppc64, this offset allows to keep the heapAddrBits to
-	// 48. Otherwize, it would be 60 in order to handle mmap addresses
+	// 48. Otherwise, it would be 60 in order to handle mmap addresses
 	// (in range 0x0a00000000000000 - 0x0afffffffffffff). But in this
 	// case, the memory reserved in (s *pageAlloc).init for chunks
 	// is causing important slowdowns.
@@ -1135,13 +1135,21 @@ func mallocgc(size uintptr, typ *_type, needzero bool) unsafe.Pointer {
 		msanmalloc(x, size)
 	}
 
+	if rate := MemProfileRate; rate > 0 {
+		// Note cache c only valid while m acquired; see #47302
+		if rate != 1 && size < c.nextSample {
+			c.nextSample -= size
+		} else {
+			profilealloc(mp, x, size)
+		}
+	}
 	mp.mallocing = 0
 	releasem(mp)
 
 	// Pointerfree data can be zeroed late in a context where preemption can occur.
 	// x will keep the memory alive.
 	if !isZeroed && needzero {
-		memclrNoHeapPointersChunked(size, x)
+		memclrNoHeapPointersChunked(size, x) // This is a possible preemption point: see #47302
 	}
 
 	if debug.malloc {
@@ -1155,16 +1163,6 @@ func mallocgc(size uintptr, typ *_type, needzero bool) unsafe.Pointer {
 		}
 	}
 
-	if rate := MemProfileRate; rate > 0 {
-		if rate != 1 && size < c.nextSample {
-			c.nextSample -= size
-		} else {
-			mp := acquirem()
-			profilealloc(mp, x, size)
-			releasem(mp)
-		}
-	}
-
 	if assistG != nil {
 		// Account for internal fragmentation in the assist
 		// debt now that we know it.
diff --git a/src/runtime/memclr_386.s b/src/runtime/memclr_386.s
index d2ef17f7ce..046c344119 100644
--- a/src/runtime/memclr_386.s
+++ b/src/runtime/memclr_386.s
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build !plan9
 // +build !plan9
 
 #include "go_asm.h"
diff --git a/src/runtime/memclr_amd64.s b/src/runtime/memclr_amd64.s
index 5d2bebb901..a10f57bd8c 100644
--- a/src/runtime/memclr_amd64.s
+++ b/src/runtime/memclr_amd64.s
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build !plan9
 // +build !plan9
 
 #include "go_asm.h"
diff --git a/src/runtime/memclr_mips64x.s b/src/runtime/memclr_mips64x.s
index d7a3251e20..bc037013fe 100644
--- a/src/runtime/memclr_mips64x.s
+++ b/src/runtime/memclr_mips64x.s
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build mips64 || mips64le
 // +build mips64 mips64le
 
 #include "go_asm.h"
diff --git a/src/runtime/memclr_mipsx.s b/src/runtime/memclr_mipsx.s
index eb2a8a7219..3d21c3c414 100644
--- a/src/runtime/memclr_mipsx.s
+++ b/src/runtime/memclr_mipsx.s
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build mips || mipsle
 // +build mips mipsle
 
 #include "textflag.h"
diff --git a/src/runtime/memclr_ppc64x.s b/src/runtime/memclr_ppc64x.s
index 7512620894..65639322b2 100644
--- a/src/runtime/memclr_ppc64x.s
+++ b/src/runtime/memclr_ppc64x.s
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build ppc64 || ppc64le
 // +build ppc64 ppc64le
 
 #include "textflag.h"
diff --git a/src/runtime/memmove_386.s b/src/runtime/memmove_386.s
index d99546c633..1a43a1f724 100644
--- a/src/runtime/memmove_386.s
+++ b/src/runtime/memmove_386.s
@@ -23,6 +23,7 @@
 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 // THE SOFTWARE.
 
+//go:build !plan9
 // +build !plan9
 
 #include "go_asm.h"
diff --git a/src/runtime/memmove_amd64.s b/src/runtime/memmove_amd64.s
index f1e3403596..24c6529f58 100644
--- a/src/runtime/memmove_amd64.s
+++ b/src/runtime/memmove_amd64.s
@@ -23,6 +23,7 @@
 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 // THE SOFTWARE.
 
+//go:build !plan9
 // +build !plan9
 
 #include "go_asm.h"
diff --git a/src/runtime/memmove_mips64x.s b/src/runtime/memmove_mips64x.s
index 8a1b88afba..fef3c6be82 100644
--- a/src/runtime/memmove_mips64x.s
+++ b/src/runtime/memmove_mips64x.s
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build mips64 || mips64le
 // +build mips64 mips64le
 
 #include "textflag.h"
diff --git a/src/runtime/memmove_mipsx.s b/src/runtime/memmove_mipsx.s
index 6c86558f8d..cd02fc25c4 100644
--- a/src/runtime/memmove_mipsx.s
+++ b/src/runtime/memmove_mipsx.s
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build mips || mipsle
 // +build mips mipsle
 
 #include "textflag.h"
diff --git a/src/runtime/memmove_ppc64x.s b/src/runtime/memmove_ppc64x.s
index dbd835506f..fd16ad8129 100644
--- a/src/runtime/memmove_ppc64x.s
+++ b/src/runtime/memmove_ppc64x.s
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build ppc64 || ppc64le
 // +build ppc64 ppc64le
 
 #include "textflag.h"
diff --git a/src/runtime/mkduff.go b/src/runtime/mkduff.go
index 8632fe08a3..da191cc594 100644
--- a/src/runtime/mkduff.go
+++ b/src/runtime/mkduff.go
@@ -179,6 +179,7 @@ func copyARM64(w io.Writer) {
 
 func tagsPPC64x(w io.Writer) {
 	fmt.Fprintln(w)
+	fmt.Fprintln(w, "//go:build ppc64 || ppc64le")
 	fmt.Fprintln(w, "// +build ppc64 ppc64le")
 	fmt.Fprintln(w)
 }
@@ -202,6 +203,7 @@ func copyPPC64x(w io.Writer) {
 
 func tagsMIPS64x(w io.Writer) {
 	fmt.Fprintln(w)
+	fmt.Fprintln(w, "//go:build mips64 || mips64le")
 	fmt.Fprintln(w, "// +build mips64 mips64le")
 	fmt.Fprintln(w)
 }
diff --git a/src/runtime/mkpreempt.go b/src/runtime/mkpreempt.go
index 3a9e6cc478..6c980540f5 100644
--- a/src/runtime/mkpreempt.go
+++ b/src/runtime/mkpreempt.go
@@ -123,6 +123,7 @@ func header(arch string) {
 	fmt.Fprintf(out, "// Code generated by mkpreempt.go; DO NOT EDIT.\n\n")
 	if beLe[arch] {
 		base := arch[:len(arch)-1]
+		fmt.Fprintf(out, "//go:build %s || %sle\n", base, base)
 		fmt.Fprintf(out, "// +build %s %sle\n\n", base, base)
 	}
 	fmt.Fprintf(out, "#include \"go_asm.h\"\n")
diff --git a/src/runtime/msan_amd64.s b/src/runtime/msan_amd64.s
index 669e9ca73f..1bb57a3b7e 100644
--- a/src/runtime/msan_amd64.s
+++ b/src/runtime/msan_amd64.s
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build msan
 // +build msan
 
 #include "go_asm.h"
diff --git a/src/runtime/msan_arm64.s b/src/runtime/msan_arm64.s
index f19906cfc8..93ade8dd89 100644
--- a/src/runtime/msan_arm64.s
+++ b/src/runtime/msan_arm64.s
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build msan
 // +build msan
 
 #include "go_asm.h"
diff --git a/src/runtime/os_darwin.go b/src/runtime/os_darwin.go
index 00139351ab..079be107d7 100644
--- a/src/runtime/os_darwin.go
+++ b/src/runtime/os_darwin.go
@@ -118,10 +118,15 @@ func sigNoteWakeup(*note) {
 
 // sigNoteSleep waits for a note created by sigNoteSetup to be woken.
 func sigNoteSleep(*note) {
-	entersyscallblock()
-	var b byte
-	read(sigNoteRead, unsafe.Pointer(&b), 1)
-	exitsyscall()
+	for {
+		var b byte
+		entersyscallblock()
+		n := read(sigNoteRead, unsafe.Pointer(&b), 1)
+		exitsyscall()
+		if n != -_EINTR {
+			return
+		}
+	}
 }
 
 // BSD interface for threading.
diff --git a/src/runtime/os_openbsd_libc.go b/src/runtime/os_openbsd_libc.go
index cff5a092d7..0a342e5533 100644
--- a/src/runtime/os_openbsd_libc.go
+++ b/src/runtime/os_openbsd_libc.go
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-//go:build (openbsd && 386) || (openbsd && amd64) || (openbsd && arm64)
-// +build openbsd,386 openbsd,amd64 openbsd,arm64
+//go:build openbsd && !mips64
+// +build openbsd,!mips64
 
 package runtime
 
diff --git a/src/runtime/os_openbsd_syscall.go b/src/runtime/os_openbsd_syscall.go
index 5315487961..3cdcb6c707 100644
--- a/src/runtime/os_openbsd_syscall.go
+++ b/src/runtime/os_openbsd_syscall.go
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-//go:build openbsd && !386 && openbsd && !amd64 && openbsd && !arm64
-// +build openbsd,!386,openbsd,!amd64,openbsd,!arm64
+//go:build openbsd && mips64
+// +build openbsd,mips64
 
 package runtime
 
diff --git a/src/runtime/os_openbsd_syscall1.go b/src/runtime/os_openbsd_syscall1.go
index ecae67aa2f..c20ee8300e 100644
--- a/src/runtime/os_openbsd_syscall1.go
+++ b/src/runtime/os_openbsd_syscall1.go
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-//go:build openbsd && !386 && !amd64 && !arm64
-// +build openbsd,!386,!amd64,!arm64
+//go:build openbsd && mips64
+// +build openbsd,mips64
 
 package runtime
 
diff --git a/src/runtime/os_openbsd_syscall2.go b/src/runtime/os_openbsd_syscall2.go
index 6aa57a99da..af1997131f 100644
--- a/src/runtime/os_openbsd_syscall2.go
+++ b/src/runtime/os_openbsd_syscall2.go
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-//go:build openbsd && !386 && !amd64 && !arm64
-// +build openbsd,!386,!amd64,!arm64
+//go:build openbsd && mips64
+// +build openbsd,mips64
 
 package runtime
 
diff --git a/src/runtime/pprof/mprof_test.go b/src/runtime/pprof/mprof_test.go
index 3ef40d3de7..b4680fbdee 100644
--- a/src/runtime/pprof/mprof_test.go
+++ b/src/runtime/pprof/mprof_test.go
@@ -86,6 +86,17 @@ func TestMemoryProfiler(t *testing.T) {
 
 	runtime.GC() // materialize stats
 
+	// TODO(mknyszek): Fix #45315 and remove this extra call.
+	//
+	// Unfortunately, it's possible for the sweep termination condition
+	// to flap, so with just one runtime.GC call, a freed object could be
+	// missed, leading this test to fail. A second call reduces the chance
+	// of this happening to zero, because sweeping actually has to finish
+	// to move on to the next GC, during which nothing will happen.
+	//
+	// See #46500 for more details.
+	runtime.GC()
+
 	memoryProfilerRun++
 
 	tests := []struct {
diff --git a/src/runtime/pprof/pprof_test.go b/src/runtime/pprof/pprof_test.go
index 7cbb4fc7ae..7c71d8263b 100644
--- a/src/runtime/pprof/pprof_test.go
+++ b/src/runtime/pprof/pprof_test.go
@@ -260,6 +260,27 @@ func parseProfile(t *testing.T, valBytes []byte, f func(uintptr, []*profile.Loca
 	return p
 }
 
+func cpuProfilingBroken() bool {
+	switch runtime.GOOS {
+	case "plan9":
+		// Profiling unimplemented.
+		return true
+	case "aix":
+		// See https://golang.org/issue/45170.
+		return true
+	case "ios", "dragonfly", "netbsd", "illumos", "solaris":
+		// See https://golang.org/issue/13841.
+		return true
+	case "openbsd":
+		if runtime.GOARCH == "arm" || runtime.GOARCH == "arm64" {
+			// See https://golang.org/issue/13841.
+			return true
+		}
+	}
+
+	return false
+}
+
 // testCPUProfile runs f under the CPU profiler, checking for some conditions specified by need,
 // as interpreted by matches, and returns the parsed profile.
 func testCPUProfile(t *testing.T, matches matchFunc, need []string, avoid []string, f func(dur time.Duration)) *profile.Profile {
@@ -275,16 +296,7 @@ func testCPUProfile(t *testing.T, matches matchFunc, need []string, avoid []stri
 		t.Skip("skipping on plan9")
 	}
 
-	broken := false
-	switch runtime.GOOS {
-	// See https://golang.org/issue/45170 for AIX.
-	case "ios", "dragonfly", "netbsd", "illumos", "solaris", "aix":
-		broken = true
-	case "openbsd":
-		if runtime.GOARCH == "arm" || runtime.GOARCH == "arm64" {
-			broken = true
-		}
-	}
+	broken := cpuProfilingBroken()
 
 	maxDuration := 5 * time.Second
 	if testing.Short() && broken {
@@ -611,7 +623,7 @@ func growstack1() {
 
 //go:noinline
 func growstack(n int) {
-	var buf [8 << 16]byte
+	var buf [8 << 18]byte
 	use(buf)
 	if n > 0 {
 		growstack(n - 1)
@@ -619,7 +631,7 @@ func growstack(n int) {
 }
 
 //go:noinline
-func use(x [8 << 16]byte) {}
+func use(x [8 << 18]byte) {}
 
 func TestBlockProfile(t *testing.T) {
 	type TestCase struct {
diff --git a/src/runtime/preempt.go b/src/runtime/preempt.go
index 372185266f..1d5aae1363 100644
--- a/src/runtime/preempt.go
+++ b/src/runtime/preempt.go
@@ -413,6 +413,8 @@ func isAsyncSafePoint(gp *g, pc, sp, lr uintptr) (bool, uintptr) {
 		//
 		// TODO: Are there cases that are safe but don't have a
 		// locals pointer map, like empty frame functions?
+		// It might be possible to preempt any assembly functions
+		// except the ones that have funcFlag_SPWRITE set in f.flag.
 		return false, 0
 	}
 	name := funcname(f)
diff --git a/src/runtime/preempt_mips64x.s b/src/runtime/preempt_mips64x.s
index 0d0c157c36..b755425bc5 100644
--- a/src/runtime/preempt_mips64x.s
+++ b/src/runtime/preempt_mips64x.s
@@ -1,5 +1,6 @@
 // Code generated by mkpreempt.go; DO NOT EDIT.
 
+//go:build mips64 || mips64le
 // +build mips64 mips64le
 
 #include "go_asm.h"
diff --git a/src/runtime/preempt_mipsx.s b/src/runtime/preempt_mipsx.s
index 86d3a918d3..c1bff60859 100644
--- a/src/runtime/preempt_mipsx.s
+++ b/src/runtime/preempt_mipsx.s
@@ -1,5 +1,6 @@
 // Code generated by mkpreempt.go; DO NOT EDIT.
 
+//go:build mips || mipsle
 // +build mips mipsle
 
 #include "go_asm.h"
diff --git a/src/runtime/preempt_ppc64x.s b/src/runtime/preempt_ppc64x.s
index 90634386db..70bd91982b 100644
--- a/src/runtime/preempt_ppc64x.s
+++ b/src/runtime/preempt_ppc64x.s
@@ -1,5 +1,6 @@
 // Code generated by mkpreempt.go; DO NOT EDIT.
 
+//go:build ppc64 || ppc64le
 // +build ppc64 ppc64le
 
 #include "go_asm.h"
diff --git a/src/runtime/proc.go b/src/runtime/proc.go
index d9f8c65530..7bc2a92590 100644
--- a/src/runtime/proc.go
+++ b/src/runtime/proc.go
@@ -529,8 +529,8 @@ var (
 	allglock mutex
 	allgs    []*g
 
-	// allglen and allgptr are atomic variables that contain len(allg) and
-	// &allg[0] respectively. Proper ordering depends on totally-ordered
+	// allglen and allgptr are atomic variables that contain len(allgs) and
+	// &allgs[0] respectively. Proper ordering depends on totally-ordered
 	// loads and stores. Writes are protected by allglock.
 	//
 	// allgptr is updated before allglen. Readers should read allglen
@@ -1303,7 +1303,7 @@ func usesLibcall() bool {
 	case "aix", "darwin", "illumos", "ios", "solaris", "windows":
 		return true
 	case "openbsd":
-		return GOARCH == "386" || GOARCH == "amd64" || GOARCH == "arm64"
+		return GOARCH == "386" || GOARCH == "amd64" || GOARCH == "arm" || GOARCH == "arm64"
 	}
 	return false
 }
@@ -1316,7 +1316,7 @@ func mStackIsSystemAllocated() bool {
 		return true
 	case "openbsd":
 		switch GOARCH {
-		case "386", "amd64", "arm64":
+		case "386", "amd64", "arm", "arm64":
 			return true
 		}
 	}
@@ -1522,6 +1522,8 @@ found:
 	}
 	unlock(&sched.lock)
 
+	atomic.Xadd64(&ncgocall, int64(m.ncgocall))
+
 	// Release the P.
 	handoffp(releasep())
 	// After this point we must not have write barriers.
@@ -3132,24 +3134,33 @@ func checkIdleGCNoP() (*p, *g) {
 		return nil, nil
 	}
 
-	// Work is available; we can start an idle GC worker only if
-	// there is an available P and available worker G.
+	// Work is available; we can start an idle GC worker only if there is
+	// an available P and available worker G.
 	//
-	// We can attempt to acquire these in either order. Workers are
-	// almost always available (see comment in findRunnableGCWorker
-	// for the one case there may be none). Since we're slightly
-	// less likely to find a P, check for that first.
+	// We can attempt to acquire these in either order, though both have
+	// synchronization concerns (see below). Workers are almost always
+	// available (see comment in findRunnableGCWorker for the one case
+	// there may be none). Since we're slightly less likely to find a P,
+	// check for that first.
+	//
+	// Synchronization: note that we must hold sched.lock until we are
+	// committed to keeping it. Otherwise we cannot put the unnecessary P
+	// back in sched.pidle without performing the full set of idle
+	// transition checks.
+	//
+	// If we were to check gcBgMarkWorkerPool first, we must somehow handle
+	// the assumption in gcControllerState.findRunnableGCWorker that an
+	// empty gcBgMarkWorkerPool is only possible if gcMarkDone is running.
 	lock(&sched.lock)
 	pp := pidleget()
-	unlock(&sched.lock)
 	if pp == nil {
+		unlock(&sched.lock)
 		return nil, nil
 	}
 
-	// Now that we own a P, gcBlackenEnabled can't change
-	// (as it requires STW).
+	// Now that we own a P, gcBlackenEnabled can't change (as it requires
+	// STW).
 	if gcBlackenEnabled == 0 {
-		lock(&sched.lock)
 		pidleput(pp)
 		unlock(&sched.lock)
 		return nil, nil
@@ -3157,12 +3168,13 @@ func checkIdleGCNoP() (*p, *g) {
 
 	node := (*gcBgMarkWorkerNode)(gcBgMarkWorkerPool.pop())
 	if node == nil {
-		lock(&sched.lock)
 		pidleput(pp)
 		unlock(&sched.lock)
 		return nil, nil
 	}
 
+	unlock(&sched.lock)
+
 	return pp, node.gp.ptr()
 }
 
@@ -3560,6 +3572,21 @@ func preemptPark(gp *g) {
 		throw("bad g status")
 	}
 	gp.waitreason = waitReasonPreempted
+
+	if gp.asyncSafePoint {
+		// Double-check that async preemption does not
+		// happen in SPWRITE assembly functions.
+		// isAsyncSafePoint must exclude this case.
+		f := findfunc(gp.sched.pc)
+		if !f.valid() {
+			throw("preempt at unknown pc")
+		}
+		if f.flag&funcFlag_SPWRITE != 0 {
+			println("runtime: unexpected SPWRITE function", funcname(f), "in async preempt")
+			throw("preempt SPWRITE")
+		}
+	}
+
 	// Transition from _Grunning to _Gscan|_Gpreempted. We can't
 	// be in _Grunning when we dropg because then we'd be running
 	// without an M, but the moment we're in _Gpreempted,
@@ -4058,8 +4085,16 @@ func exitsyscall0(gp *g) {
 	if schedEnabled(gp) {
 		_p_ = pidleget()
 	}
+	var locked bool
 	if _p_ == nil {
 		globrunqput(gp)
+
+		// Below, we stoplockedm if gp is locked. globrunqput releases
+		// ownership of gp, so we must check if gp is locked prior to
+		// committing the release by unlocking sched.lock, otherwise we
+		// could race with another M transitioning gp from unlocked to
+		// locked.
+		locked = gp.lockedm != 0
 	} else if atomic.Load(&sched.sysmonwait) != 0 {
 		atomic.Store(&sched.sysmonwait, 0)
 		notewakeup(&sched.sysmonnote)
@@ -4069,7 +4104,7 @@ func exitsyscall0(gp *g) {
 		acquirep(_p_)
 		execute(gp, false) // Never returns.
 	}
-	if gp.lockedm != 0 {
+	if locked {
 		// Wait until another thread schedules gp and so m again.
 		//
 		// N.B. lockedm must be this M, as this g was running on this M
@@ -4884,7 +4919,6 @@ func (pp *p) destroy() {
 		moveTimers(plocal, pp.timers)
 		pp.timers = nil
 		pp.numTimers = 0
-		pp.adjustTimers = 0
 		pp.deletedTimers = 0
 		atomic.Store64(&pp.timer0When, 0)
 		unlock(&pp.timersLock)
diff --git a/src/runtime/race.go b/src/runtime/race.go
index cc8c5db1bd..ce6b5b5468 100644
--- a/src/runtime/race.go
+++ b/src/runtime/race.go
@@ -343,7 +343,7 @@ func racereadrangepc1(addr, size, pc uintptr)
 func racewriterangepc1(addr, size, pc uintptr)
 func racecallbackthunk(uintptr)
 
-// racecall allows calling an arbitrary function f from C race runtime
+// racecall allows calling an arbitrary function fn from C race runtime
 // with up to 4 uintptr arguments.
 func racecall(fn *byte, arg0, arg1, arg2, arg3 uintptr)
 
diff --git a/src/runtime/race/syso_test.go b/src/runtime/race/syso_test.go
index cbce5a8f18..f5095737a4 100644
--- a/src/runtime/race/syso_test.go
+++ b/src/runtime/race/syso_test.go
@@ -2,14 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-//go:build !android && !js && !ppc64le
-// +build !android,!js,!ppc64le
-
-// Note: we don't run on Android or ppc64 because if there is any non-race test
-// file in this package, the OS tries to link the .syso file into the
-// test (even when we're not in race mode), which fails. I'm not sure
-// why, but easiest to just punt - as long as a single builder runs
-// this test, we're good.
+//go:build race
+// +build race
 
 package race
 
diff --git a/src/runtime/race_amd64.s b/src/runtime/race_amd64.s
index 58a919efe8..8d4813eadd 100644
--- a/src/runtime/race_amd64.s
+++ b/src/runtime/race_amd64.s
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build race
 // +build race
 
 #include "go_asm.h"
diff --git a/src/runtime/race_arm64.s b/src/runtime/race_arm64.s
index 82e3caadc8..c6d5b91edc 100644
--- a/src/runtime/race_arm64.s
+++ b/src/runtime/race_arm64.s
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build race
 // +build race
 
 #include "go_asm.h"
diff --git a/src/runtime/race_ppc64le.s b/src/runtime/race_ppc64le.s
index 069e4d86dd..963e57099c 100644
--- a/src/runtime/race_ppc64le.s
+++ b/src/runtime/race_ppc64le.s
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build race
 // +build race
 
 #include "go_asm.h"
diff --git a/src/runtime/rt0_linux_mips64x.s b/src/runtime/rt0_linux_mips64x.s
index 55506755df..fabd8570b5 100644
--- a/src/runtime/rt0_linux_mips64x.s
+++ b/src/runtime/rt0_linux_mips64x.s
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build linux && (mips64 || mips64le)
 // +build linux
 // +build mips64 mips64le
 
diff --git a/src/runtime/rt0_linux_mipsx.s b/src/runtime/rt0_linux_mipsx.s
index 74b8f50b73..9f5842b51a 100644
--- a/src/runtime/rt0_linux_mipsx.s
+++ b/src/runtime/rt0_linux_mipsx.s
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build linux && (mips || mipsle)
 // +build linux
 // +build mips mipsle
 
diff --git a/src/runtime/runtime2.go b/src/runtime/runtime2.go
index 0e0eb0b728..5051ec4d3e 100644
--- a/src/runtime/runtime2.go
+++ b/src/runtime/runtime2.go
@@ -681,7 +681,7 @@ type p struct {
 	// timerModifiedEarlier status. Because the timer may have been
 	// modified again, there need not be any timer with this value.
 	// This is updated using atomic functions.
-	// This is 0 if the value is unknown.
+	// This is 0 if there are no timerModifiedEarlier timers.
 	timerModifiedEarliest uint64
 
 	// Per-P GC state
@@ -727,12 +727,6 @@ type p struct {
 	// Modified using atomic instructions.
 	numTimers uint32
 
-	// Number of timerModifiedEarlier timers on P's heap.
-	// This should only be modified while holding timersLock,
-	// or while the timer status is in a transient state
-	// such as timerModifying.
-	adjustTimers uint32
-
 	// Number of timerDeleted timers in P's heap.
 	// Modified using atomic instructions.
 	deletedTimers uint32
@@ -895,7 +889,7 @@ type funcinl struct {
 // layout of Itab known to compilers
 // allocated in non-garbage-collected memory
 // Needs to be in sync with
-// ../cmd/compile/internal/gc/reflect.go:/^func.WriteTabs.
+// ../cmd/compile/internal/reflectdata/reflect.go:/^func.WriteTabs.
 type itab struct {
 	inter *interfacetype
 	_type *_type
@@ -940,7 +934,7 @@ func extendRandom(r []byte, n int) {
 
 // A _defer holds an entry on the list of deferred calls.
 // If you add a field here, add code to clear it in freedefer and deferProcStack
-// This struct must match the code in cmd/compile/internal/gc/reflect.go:deferstruct
+// This struct must match the code in cmd/compile/internal/reflectdata/reflect.go:deferstruct
 // and cmd/compile/internal/gc/ssa.go:(*state).call.
 // Some defers will be allocated on the stack and some on the heap.
 // All defers are logically part of the stack, so write barriers to
diff --git a/src/runtime/select.go b/src/runtime/select.go
index e72761bfa9..06edb69f42 100644
--- a/src/runtime/select.go
+++ b/src/runtime/select.go
@@ -15,7 +15,7 @@ const debugSelect = false
 
 // Select case descriptor.
 // Known to compiler.
-// Changes here must also be made in src/cmd/internal/gc/select.go's scasetype.
+// Changes here must also be made in src/cmd/compile/internal/walk/select.go's scasetype.
 type scase struct {
 	c    *hchan         // chan
 	elem unsafe.Pointer // data element
diff --git a/src/runtime/sigaction.go b/src/runtime/sigaction.go
index 76f37b1b53..30050efcc7 100644
--- a/src/runtime/sigaction.go
+++ b/src/runtime/sigaction.go
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-//go:build (linux && !amd64 && !arm64) || (freebsd && !amd64)
-// +build linux,!amd64,!arm64 freebsd,!amd64
+//go:build (linux && !amd64 && !arm64 && !ppc64le) || (freebsd && !amd64)
+// +build linux,!amd64,!arm64,!ppc64le freebsd,!amd64
 
 package runtime
 
diff --git a/src/runtime/signal_unix.go b/src/runtime/signal_unix.go
index f2e526973d..6096760b50 100644
--- a/src/runtime/signal_unix.go
+++ b/src/runtime/signal_unix.go
@@ -280,6 +280,8 @@ func setProcessCPUProfiler(hz int32) {
 		it.it_value = it.it_interval
 		setitimer(_ITIMER_PROF, &it, nil)
 	} else {
+		setitimer(_ITIMER_PROF, &itimerval{}, nil)
+
 		// If the Go signal handler should be disabled by default,
 		// switch back to the signal handler that was installed
 		// when we enabled profiling. We don't try to handle the case
@@ -303,8 +305,6 @@ func setProcessCPUProfiler(hz int32) {
 				setsig(_SIGPROF, h)
 			}
 		}
-
-		setitimer(_ITIMER_PROF, &itimerval{}, nil)
 	}
 }
 
@@ -382,7 +382,7 @@ func preemptM(mp *m) {
 //go:nosplit
 func sigFetchG(c *sigctxt) *g {
 	switch GOARCH {
-	case "arm", "arm64":
+	case "arm", "arm64", "ppc64", "ppc64le":
 		if !iscgo && inVDSOPage(c.sigpc()) {
 			// When using cgo, we save the g on TLS and load it from there
 			// in sigtramp. Just use that.
diff --git a/src/runtime/slice.go b/src/runtime/slice.go
index f9d4154acf..01cdcaeee3 100644
--- a/src/runtime/slice.go
+++ b/src/runtime/slice.go
@@ -112,19 +112,37 @@ func makeslice64(et *_type, len64, cap64 int64) unsafe.Pointer {
 	return makeslice(et, len, cap)
 }
 
-func unsafeslice(et *_type, len int) {
+func unsafeslice(et *_type, ptr unsafe.Pointer, len int) {
+	if len == 0 {
+		return
+	}
+
+	if ptr == nil {
+		panic(errorString("unsafe.Slice: ptr is nil and len is not zero"))
+	}
+
 	mem, overflow := math.MulUintptr(et.size, uintptr(len))
 	if overflow || mem > maxAlloc || len < 0 {
 		panicunsafeslicelen()
 	}
 }
 
-func unsafeslice64(et *_type, len64 int64) {
+func unsafeslice64(et *_type, ptr unsafe.Pointer, len64 int64) {
 	len := int(len64)
 	if int64(len) != len64 {
 		panicunsafeslicelen()
 	}
-	unsafeslice(et, len)
+	unsafeslice(et, ptr, len)
+}
+
+func unsafeslicecheckptr(et *_type, ptr unsafe.Pointer, len64 int64) {
+	unsafeslice64(et, ptr, len64)
+
+	// Check that underlying array doesn't straddle multiple heap objects.
+	// unsafeslice64 has already checked for overflow.
+	if checkptrStraddles(ptr, uintptr(len64)*et.size) {
+		throw("checkptr: unsafe.Slice result straddles multiple allocations")
+	}
 }
 
 func panicunsafeslicelen() {
diff --git a/src/runtime/stack.go b/src/runtime/stack.go
index b21c9c9518..6e0d157630 100644
--- a/src/runtime/stack.go
+++ b/src/runtime/stack.go
@@ -1064,7 +1064,9 @@ func newstack() {
 	// recheck the bounds on return.)
 	if f := findfunc(gp.sched.pc); f.valid() {
 		max := uintptr(funcMaxSPDelta(f))
-		for newsize-gp.sched.sp < max+_StackGuard {
+		needed := max + _StackGuard
+		used := gp.stack.hi - gp.sched.sp
+		for newsize-used < needed {
 			newsize *= 2
 		}
 	}
diff --git a/src/runtime/stubs_ppc64.go b/src/runtime/stubs_ppc64.go
new file mode 100644
index 0000000000..f692947109
--- /dev/null
+++ b/src/runtime/stubs_ppc64.go
@@ -0,0 +1,16 @@
+// Copyright 2021 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+//go:build linux
+// +build linux
+
+package runtime
+
+// Called from assembly only; declared for go vet.
+func load_g()
+func save_g()
+func reginit()
+
+//go:noescape
+func callCgoSigaction(sig uintptr, new, old *sigactiont) int32
diff --git a/src/runtime/stubs_ppc64x.go b/src/runtime/stubs_ppc64le.go
similarity index 83%
rename from src/runtime/stubs_ppc64x.go
rename to src/runtime/stubs_ppc64le.go
index 0841b413fd..5b733136e3 100644
--- a/src/runtime/stubs_ppc64x.go
+++ b/src/runtime/stubs_ppc64le.go
@@ -2,9 +2,6 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-//go:build ppc64 || ppc64le
-// +build ppc64 ppc64le
-
 package runtime
 
 // Called from assembly only; declared for go vet.
diff --git a/src/runtime/symtab.go b/src/runtime/symtab.go
index 6b535dfcbf..999300a58e 100644
--- a/src/runtime/symtab.go
+++ b/src/runtime/symtab.go
@@ -68,8 +68,15 @@ func CallersFrames(callers []uintptr) *Frames {
 	return f
 }
 
-// Next returns frame information for the next caller.
-// If more is false, there are no more callers (the Frame value is valid).
+// Next returns a Frame representing the next call frame in the slice
+// of PC values. If it has already returned all call frames, Next
+// returns a zero Frame.
+//
+// The more result indicates whether the next call to Next will return
+// a valid Frame. It does not necessarily indicate whether this call
+// returned one.
+//
+// See the Frames example for idiomatic usage.
 func (ci *Frames) Next() (frame Frame, more bool) {
 	for len(ci.frames) < 2 {
 		// Find the next frame.
diff --git a/src/runtime/sys_aix_ppc64.s b/src/runtime/sys_aix_ppc64.s
index a56d043f42..c171c191c0 100644
--- a/src/runtime/sys_aix_ppc64.s
+++ b/src/runtime/sys_aix_ppc64.s
@@ -2,9 +2,6 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build aix
-// +build ppc64 ppc64le
-
 //
 // System calls and other sys.stuff for ppc64, Aix
 //
diff --git a/src/runtime/sys_libc.go b/src/runtime/sys_libc.go
index 91195eb3c0..b1a9f8b536 100644
--- a/src/runtime/sys_libc.go
+++ b/src/runtime/sys_libc.go
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-//go:build darwin || (openbsd && 386) || (openbsd && amd64) || (openbsd && arm64)
-// +build darwin openbsd,386 openbsd,amd64 openbsd,arm64
+//go:build darwin || (openbsd && !mips64)
+// +build darwin openbsd,!mips64
 
 package runtime
 
diff --git a/src/runtime/sys_linux_mips64x.s b/src/runtime/sys_linux_mips64x.s
index 0206cb88bd..e18d291445 100644
--- a/src/runtime/sys_linux_mips64x.s
+++ b/src/runtime/sys_linux_mips64x.s
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build linux && (mips64 || mips64le)
 // +build linux
 // +build mips64 mips64le
 
diff --git a/src/runtime/sys_linux_mipsx.s b/src/runtime/sys_linux_mipsx.s
index d5317d3957..b3970be9cf 100644
--- a/src/runtime/sys_linux_mipsx.s
+++ b/src/runtime/sys_linux_mipsx.s
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build linux && (mips || mipsle)
 // +build linux
 // +build mips mipsle
 
diff --git a/src/runtime/sys_linux_ppc64x.s b/src/runtime/sys_linux_ppc64x.s
index 75da130357..005fa4d2b4 100644
--- a/src/runtime/sys_linux_ppc64x.s
+++ b/src/runtime/sys_linux_ppc64x.s
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build linux && (ppc64 || ppc64le)
 // +build linux
 // +build ppc64 ppc64le
 
@@ -215,15 +216,45 @@ TEXT runtime·walltime(SB),NOSPLIT,$16-12
 	MOVD	(g_sched+gobuf_sp)(R7), R1	// Set SP to g0 stack
 
 noswitch:
-	SUB	$16, R1			// Space for results
-	RLDICR	$0, R1, $59, R1		// Align for C code
+	SUB	$16, R1                 // Space for results
+	RLDICR	$0, R1, $59, R1         // Align for C code
 	MOVD	R12, CTR
 	MOVD	R1, R4
-	BL	(CTR)			// Call from VDSO
-	MOVD	$0, R0			// Restore R0
-	MOVD	0(R1), R3		// sec
-	MOVD	8(R1), R5		// nsec
-	MOVD	R15, R1			// Restore SP
+
+	// Store g on gsignal's stack, so if we receive a signal
+	// during VDSO code we can find the g.
+	// If we don't have a signal stack, we won't receive signal,
+	// so don't bother saving g.
+	// When using cgo, we already saved g on TLS, also don't save
+	// g here.
+	// Also don't save g if we are already on the signal stack.
+	// We won't get a nested signal.
+	MOVBZ	runtime·iscgo(SB), R22
+	CMP	R22, $0
+	BNE	nosaveg
+	MOVD	m_gsignal(R21), R22	// g.m.gsignal
+	CMP	R22, $0
+	BEQ	nosaveg
+
+	CMP	g, R22
+	BEQ	nosaveg
+	MOVD	(g_stack+stack_lo)(R22), R22 // g.m.gsignal.stack.lo
+	MOVD	g, (R22)
+
+	BL	(CTR)	// Call from VDSO
+
+	MOVD	$0, (R22)	// clear g slot, R22 is unchanged by C code
+
+	JMP	finish
+
+nosaveg:
+	BL	(CTR)	// Call from VDSO
+
+finish:
+	MOVD	$0, R0		// Restore R0
+	MOVD	0(R1), R3	// sec
+	MOVD	8(R1), R5	// nsec
+	MOVD	R15, R1		// Restore SP
 
 	// Restore vdsoPC, vdsoSP
 	// We don't worry about being signaled between the two stores.
@@ -235,7 +266,7 @@ noswitch:
 	MOVD	32(R1), R6
 	MOVD	R6, m_vdsoPC(R21)
 
-finish:
+return:
 	MOVD	R3, sec+0(FP)
 	MOVW	R5, nsec+8(FP)
 	RET
@@ -246,7 +277,7 @@ fallback:
 	SYSCALL $SYS_clock_gettime
 	MOVD	32(R1), R3
 	MOVD	40(R1), R5
-	JMP	finish
+	JMP	return
 
 TEXT runtime·nanotime1(SB),NOSPLIT,$16-8
 	MOVD	$1, R3		// CLOCK_MONOTONIC
@@ -282,7 +313,37 @@ noswitch:
 	RLDICR	$0, R1, $59, R1		// Align for C code
 	MOVD	R12, CTR
 	MOVD	R1, R4
-	BL	(CTR)			// Call from VDSO
+
+	// Store g on gsignal's stack, so if we receive a signal
+	// during VDSO code we can find the g.
+	// If we don't have a signal stack, we won't receive signal,
+	// so don't bother saving g.
+	// When using cgo, we already saved g on TLS, also don't save
+	// g here.
+	// Also don't save g if we are already on the signal stack.
+	// We won't get a nested signal.
+	MOVBZ	runtime·iscgo(SB), R22
+	CMP	R22, $0
+	BNE	nosaveg
+	MOVD	m_gsignal(R21), R22	// g.m.gsignal
+	CMP	R22, $0
+	BEQ	nosaveg
+
+	CMP	g, R22
+	BEQ	nosaveg
+	MOVD	(g_stack+stack_lo)(R22), R22 // g.m.gsignal.stack.lo
+	MOVD	g, (R22)
+
+	BL	(CTR)	// Call from VDSO
+
+	MOVD	$0, (R22)	// clear g slot, R22 is unchanged by C code
+
+	JMP	finish
+
+nosaveg:
+	BL	(CTR)	// Call from VDSO
+
+finish:
 	MOVD	$0, R0			// Restore R0
 	MOVD	0(R1), R3		// sec
 	MOVD	8(R1), R5		// nsec
@@ -298,7 +359,7 @@ noswitch:
 	MOVD	32(R1), R6
 	MOVD	R6, m_vdsoPC(R21)
 
-finish:
+return:
 	// sec is in R3, nsec in R5
 	// return nsec in R3
 	MOVD	$1000000000, R4
@@ -313,7 +374,7 @@ fallback:
 	SYSCALL $SYS_clock_gettime
 	MOVD	32(R1), R3
 	MOVD	40(R1), R5
-	JMP	finish
+	JMP	return
 
 TEXT runtime·rtsigprocmask(SB),NOSPLIT|NOFRAME,$0-28
 	MOVW	how+0(FP), R3
@@ -336,6 +397,26 @@ TEXT runtime·rt_sigaction(SB),NOSPLIT|NOFRAME,$0-36
 	MOVW	R3, ret+32(FP)
 	RET
 
+#ifdef GOARCH_ppc64le
+// Call the function stored in _cgo_sigaction using the GCC calling convention.
+TEXT runtime·callCgoSigaction(SB),NOSPLIT,$0
+	MOVD    sig+0(FP), R3
+	MOVD    new+8(FP), R4
+	MOVD    old+16(FP), R5
+	MOVD     _cgo_sigaction(SB), R12
+	MOVD    R12, CTR                // R12 should contain the function address
+	MOVD    R1, R15                 // Save R1
+	MOVD    R2, 24(R1)              // Save R2
+	SUB     $48, R1                 // reserve 32 (frame) + 16 bytes for sp-8 where fp may be saved.
+	RLDICR  $0, R1, $59, R1         // Align to 16 bytes for C code
+	BL      (CTR)
+	XOR     R0, R0, R0              // Clear R0 as Go expects
+	MOVD    R15, R1                 // Restore R1
+	MOVD    24(R1), R2              // Restore R2
+	MOVW    R3, ret+24(FP)          // Return result
+	RET
+#endif
+
 TEXT runtime·sigfwd(SB),NOSPLIT,$0-32
 	MOVW	sig+8(FP), R3
 	MOVD	info+16(FP), R4
@@ -351,22 +432,104 @@ TEXT runtime·sigreturn(SB),NOSPLIT,$0-0
 
 #ifdef GOARCH_ppc64le
 // ppc64le doesn't need function descriptors
-TEXT runtime·sigtramp(SB),NOSPLIT,$64
+// Save callee-save registers in the case of signal forwarding.
+// Same as on ARM64 https://golang.org/issue/31827 .
+TEXT runtime·sigtramp(SB),NOSPLIT|NOFRAME,$0
 #else
 // function descriptor for the real sigtramp
 TEXT runtime·sigtramp(SB),NOSPLIT|NOFRAME,$0
 	DWORD	$sigtramp<>(SB)
 	DWORD	$0
 	DWORD	$0
-TEXT sigtramp<>(SB),NOSPLIT,$64
+TEXT sigtramp<>(SB),NOSPLIT|NOFRAME,$0
 #endif
+	// Start with standard C stack frame layout and linkage.
+	MOVD    LR, R0
+	MOVD    R0, 16(R1) // Save LR in caller's frame.
+	MOVW    CR, R0     // Save CR in caller's frame
+	MOVD    R0, 8(R1)
+	// The stack must be acquired here and not
+	// in the automatic way based on stack size
+	// since that sequence clobbers R31 before it
+	// gets saved.
+	// We are being ultra safe here in saving the
+	// Vregs. The case where they might need to
+	// be saved is very unlikely.
+	MOVDU   R1, -544(R1)
+	MOVD    R14, 64(R1)
+	MOVD    R15, 72(R1)
+	MOVD    R16, 80(R1)
+	MOVD    R17, 88(R1)
+	MOVD    R18, 96(R1)
+	MOVD    R19, 104(R1)
+	MOVD    R20, 112(R1)
+	MOVD    R21, 120(R1)
+	MOVD    R22, 128(R1)
+	MOVD    R23, 136(R1)
+	MOVD    R24, 144(R1)
+	MOVD    R25, 152(R1)
+	MOVD    R26, 160(R1)
+	MOVD    R27, 168(R1)
+	MOVD    R28, 176(R1)
+	MOVD    R29, 184(R1)
+	MOVD    g, 192(R1) // R30
+	MOVD    R31, 200(R1)
+	FMOVD   F14, 208(R1)
+	FMOVD   F15, 216(R1)
+	FMOVD   F16, 224(R1)
+	FMOVD   F17, 232(R1)
+	FMOVD   F18, 240(R1)
+	FMOVD   F19, 248(R1)
+	FMOVD   F20, 256(R1)
+	FMOVD   F21, 264(R1)
+	FMOVD   F22, 272(R1)
+	FMOVD   F23, 280(R1)
+	FMOVD   F24, 288(R1)
+	FMOVD   F25, 296(R1)
+	FMOVD   F26, 304(R1)
+	FMOVD   F27, 312(R1)
+	FMOVD   F28, 320(R1)
+	FMOVD   F29, 328(R1)
+	FMOVD   F30, 336(R1)
+	FMOVD   F31, 344(R1)
+	// Save V regs
+	// STXVD2X and LXVD2X used since
+	// we aren't sure of alignment.
+	// Endianness doesn't matter
+	// if we are just loading and
+	// storing values.
+	MOVD	$352, R7 // V20
+	STXVD2X VS52, (R7)(R1)
+	ADD	$16, R7 // V21 368
+	STXVD2X VS53, (R7)(R1)
+	ADD	$16, R7 // V22 384
+	STXVD2X VS54, (R7)(R1)
+	ADD	$16, R7 // V23 400
+	STXVD2X VS55, (R7)(R1)
+	ADD	$16, R7 // V24 416
+	STXVD2X	VS56, (R7)(R1)
+	ADD	$16, R7 // V25 432
+	STXVD2X	VS57, (R7)(R1)
+	ADD	$16, R7 // V26 448
+	STXVD2X VS58, (R7)(R1)
+	ADD	$16, R7 // V27 464
+	STXVD2X VS59, (R7)(R1)
+	ADD	$16, R7 // V28 480
+	STXVD2X VS60, (R7)(R1)
+	ADD	$16, R7 // V29 496
+	STXVD2X VS61, (R7)(R1)
+	ADD	$16, R7 // V30 512
+	STXVD2X VS62, (R7)(R1)
+	ADD	$16, R7 // V31 528
+	STXVD2X VS63, (R7)(R1)
+
 	// initialize essential registers (just in case)
 	BL	runtime·reginit(SB)
 
 	// this might be called in external code context,
 	// where g is not set.
 	MOVBZ	runtime·iscgo(SB), R6
-	CMP 	R6, $0
+	CMP	R6, $0
 	BEQ	2(PC)
 	BL	runtime·load_g(SB)
 
@@ -376,7 +539,74 @@ TEXT sigtramp<>(SB),NOSPLIT,$64
 	MOVD	$runtime·sigtrampgo(SB), R12
 	MOVD	R12, CTR
 	BL	(CTR)
-	MOVD	24(R1), R2
+	MOVD	24(R1), R2 // Should this be here? Where is it saved?
+	// Starts at 64; FIXED_FRAME is 32
+	MOVD    64(R1), R14
+	MOVD    72(R1), R15
+	MOVD    80(R1), R16
+	MOVD    88(R1), R17
+	MOVD    96(R1), R18
+	MOVD    104(R1), R19
+	MOVD    112(R1), R20
+	MOVD    120(R1), R21
+	MOVD    128(R1), R22
+	MOVD    136(R1), R23
+	MOVD    144(R1), R24
+	MOVD    152(R1), R25
+	MOVD    160(R1), R26
+	MOVD    168(R1), R27
+	MOVD    176(R1), R28
+	MOVD    184(R1), R29
+	MOVD    192(R1), g // R30
+	MOVD    200(R1), R31
+	FMOVD   208(R1), F14
+	FMOVD   216(R1), F15
+	FMOVD   224(R1), F16
+	FMOVD   232(R1), F17
+	FMOVD   240(R1), F18
+	FMOVD   248(R1), F19
+	FMOVD   256(R1), F20
+	FMOVD   264(R1), F21
+	FMOVD   272(R1), F22
+	FMOVD   280(R1), F23
+	FMOVD   288(R1), F24
+	FMOVD   292(R1), F25
+	FMOVD   300(R1), F26
+	FMOVD   308(R1), F27
+	FMOVD   316(R1), F28
+	FMOVD   328(R1), F29
+	FMOVD   336(R1), F30
+	FMOVD   344(R1), F31
+	MOVD	$352, R7
+	LXVD2X	(R7)(R1), VS52
+	ADD	$16, R7 // 368 V21
+	LXVD2X	(R7)(R1), VS53
+	ADD	$16, R7 // 384 V22
+	LXVD2X	(R7)(R1), VS54
+	ADD	$16, R7 // 400 V23
+	LXVD2X	(R7)(R1), VS55
+	ADD	$16, R7 // 416 V24
+	LXVD2X	(R7)(R1), VS56
+	ADD	$16, R7 // 432 V25
+	LXVD2X	(R7)(R1), VS57
+	ADD	$16, R7 // 448 V26
+	LXVD2X	(R7)(R1), VS58
+	ADD	$16, R8 // 464 V27
+	LXVD2X	(R7)(R1), VS59
+	ADD	$16, R7 // 480 V28
+	LXVD2X	(R7)(R1), VS60
+	ADD	$16, R7 // 496 V29
+	LXVD2X	(R7)(R1), VS61
+	ADD	$16, R7 // 512 V30
+	LXVD2X	(R7)(R1), VS62
+	ADD	$16, R7 // 528 V31
+	LXVD2X	(R7)(R1), VS63
+	ADD	$544, R1
+	MOVD	8(R1), R0
+	MOVFL	R0, $0xff
+	MOVD	16(R1), R0
+	MOVD	R0, LR
+
 	RET
 
 #ifdef GOARCH_ppc64le
@@ -406,6 +636,7 @@ TEXT runtime·cgoSigtramp(SB),NOSPLIT|NOFRAME,$0
 
 	// Figure out if we are currently in a cgo call.
 	// If not, just do usual sigtramp.
+	// compared to ARM64 and others.
 	CMP	$0, g
 	BEQ	sigtrampnog // g == nil
 	MOVD	g_m(g), R6
diff --git a/src/runtime/sys_openbsd.go b/src/runtime/sys_openbsd.go
index f6146c2e1d..ab3149558b 100644
--- a/src/runtime/sys_openbsd.go
+++ b/src/runtime/sys_openbsd.go
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-//go:build (openbsd && 386) || (openbsd && amd64) || (openbsd && arm64)
-// +build openbsd,386 openbsd,amd64 openbsd,arm64
+//go:build openbsd && !mips64
+// +build openbsd,!mips64
 
 package runtime
 
diff --git a/src/runtime/sys_openbsd1.go b/src/runtime/sys_openbsd1.go
index b007b6d3f5..cb5d35879c 100644
--- a/src/runtime/sys_openbsd1.go
+++ b/src/runtime/sys_openbsd1.go
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-//go:build (openbsd && 386) || (openbsd && amd64) || (openbsd && arm64)
-// +build openbsd,386 openbsd,amd64 openbsd,arm64
+//go:build openbsd && !mips64
+// +build openbsd,!mips64
 
 package runtime
 
@@ -23,6 +23,7 @@ func thrwakeup(ident uintptr, n int32) int32 {
 }
 func thrwakeup_trampoline()
 
+//go:nosplit
 func osyield() {
 	libcCall(unsafe.Pointer(funcPC(sched_yield_trampoline)), unsafe.Pointer(nil))
 }
diff --git a/src/runtime/sys_openbsd2.go b/src/runtime/sys_openbsd2.go
index 91ed04fb48..cd1a4e879f 100644
--- a/src/runtime/sys_openbsd2.go
+++ b/src/runtime/sys_openbsd2.go
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-//go:build (openbsd && 386) || (openbsd && amd64) || (openbsd && arm64)
-// +build openbsd,386 openbsd,amd64 openbsd,arm64
+//go:build openbsd && !mips64
+// +build openbsd,!mips64
 
 package runtime
 
diff --git a/src/runtime/sys_openbsd3.go b/src/runtime/sys_openbsd3.go
index 8fdee05733..8d77a4b216 100644
--- a/src/runtime/sys_openbsd3.go
+++ b/src/runtime/sys_openbsd3.go
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-//go:build (openbsd && 386) || (openbsd && amd64) || (openbsd && arm64)
-// +build openbsd,386 openbsd,amd64 openbsd,arm64
+//go:build openbsd && !mips64
+// +build openbsd,!mips64
 
 package runtime
 
diff --git a/src/runtime/sys_openbsd_arm.s b/src/runtime/sys_openbsd_arm.s
index 45d69a312a..143fcf0518 100644
--- a/src/runtime/sys_openbsd_arm.s
+++ b/src/runtime/sys_openbsd_arm.s
@@ -10,7 +10,7 @@
 #include "go_tls.h"
 #include "textflag.h"
 
-#define CLOCK_REALTIME	$0
+#define	CLOCK_REALTIME	$0
 #define	CLOCK_MONOTONIC	$3
 
 // With OpenBSD 6.7 onwards, an armv7 syscall returns two instructions
@@ -25,238 +25,40 @@
 	NOOP;		\
 	NOOP
 
-// Exit the entire program (like C exit)
-TEXT runtime·exit(SB),NOSPLIT|NOFRAME,$0
-	MOVW	code+0(FP), R0	// arg 1 - status
-	MOVW	$1, R12			// sys_exit
-	INVOKE_SYSCALL
-	MOVW.CS	$0, R8			// crash on syscall failure
-	MOVW.CS	R8, (R8)
-	RET
+// mstart_stub is the first function executed on a new thread started by pthread_create.
+// It just does some low-level setup and then calls mstart.
+// Note: called with the C calling convention.
+TEXT runtime·mstart_stub(SB),NOSPLIT,$0
+	// R0 points to the m.
+	// We are already on m's g0 stack.
 
-// func exitThread(wait *uint32)
-TEXT runtime·exitThread(SB),NOSPLIT,$0-4
-	MOVW	wait+0(FP), R0		// arg 1 - notdead
-	MOVW	$302, R12		// sys___threxit
-	INVOKE_SYSCALL
-	MOVW.CS	$1, R8			// crash on syscall failure
-	MOVW.CS	R8, (R8)
-	JMP	0(PC)
+	// Save callee-save registers.
+	MOVM.DB.W [R4-R11], (R13)
 
-TEXT runtime·open(SB),NOSPLIT|NOFRAME,$0
-	MOVW	name+0(FP), R0		// arg 1 - path
-	MOVW	mode+4(FP), R1		// arg 2 - mode
-	MOVW	perm+8(FP), R2		// arg 3 - perm
-	MOVW	$5, R12			// sys_open
-	INVOKE_SYSCALL
-	MOVW.CS	$-1, R0
-	MOVW	R0, ret+12(FP)
-	RET
+	MOVW	m_g0(R0), g
+	BL	runtime·save_g(SB)
 
-TEXT runtime·closefd(SB),NOSPLIT|NOFRAME,$0
-	MOVW	fd+0(FP), R0		// arg 1 - fd
-	MOVW	$6, R12			// sys_close
-	INVOKE_SYSCALL
-	MOVW.CS	$-1, R0
-	MOVW	R0, ret+4(FP)
-	RET
+	BL	runtime·mstart(SB)
 
-TEXT runtime·read(SB),NOSPLIT|NOFRAME,$0
-	MOVW	fd+0(FP), R0		// arg 1 - fd
-	MOVW	p+4(FP), R1		// arg 2 - buf
-	MOVW	n+8(FP), R2		// arg 3 - nbyte
-	MOVW	$3, R12			// sys_read
-	INVOKE_SYSCALL
-	RSB.CS	$0, R0		// caller expects negative errno
-	MOVW	R0, ret+12(FP)
-	RET
+	// Restore callee-save registers.
+	MOVM.IA.W (R13), [R4-R11]
 
-// func pipe() (r, w int32, errno int32)
-TEXT runtime·pipe(SB),NOSPLIT,$0-12
-	MOVW	$r+0(FP), R0
-	MOVW	$263, R12
-	INVOKE_SYSCALL
-	MOVW	R0, errno+8(FP)
-	RET
-
-// func pipe2(flags int32) (r, w int32, errno int32)
-TEXT runtime·pipe2(SB),NOSPLIT,$0-16
-	MOVW	$r+4(FP), R0
-	MOVW	flags+0(FP), R1
-	MOVW	$101, R12
-	INVOKE_SYSCALL
-	MOVW	R0, errno+12(FP)
-	RET
-
-TEXT runtime·write1(SB),NOSPLIT|NOFRAME,$0
-	MOVW	fd+0(FP), R0		// arg 1 - fd
-	MOVW	p+4(FP), R1		// arg 2 - buf
-	MOVW	n+8(FP), R2		// arg 3 - nbyte
-	MOVW	$4, R12			// sys_write
-	INVOKE_SYSCALL
-	RSB.CS	$0, R0		// caller expects negative errno
-	MOVW	R0, ret+12(FP)
-	RET
-
-TEXT runtime·usleep(SB),NOSPLIT,$16
-	MOVW	usec+0(FP), R0
-	CALL	runtime·usplitR0(SB)
-	MOVW	R0, 4(R13)		// tv_sec - l32
+	// Go is all done with this OS thread.
+	// Tell pthread everything is ok (we never join with this thread, so
+	// the value here doesn't really matter).
 	MOVW	$0, R0
-	MOVW	R0, 8(R13)		// tv_sec - h32
-	MOVW	$1000, R2
-	MUL	R1, R2
-	MOVW	R2, 12(R13)		// tv_nsec
-
-	MOVW	$4(R13), R0		// arg 1 - rqtp
-	MOVW	$0, R1			// arg 2 - rmtp
-	MOVW	$91, R12		// sys_nanosleep
-	INVOKE_SYSCALL
-	RET
-
-TEXT runtime·getthrid(SB),NOSPLIT,$0-4
-	MOVW	$299, R12		// sys_getthrid
-	INVOKE_SYSCALL
-	MOVW	R0, ret+0(FP)
-	RET
-
-TEXT runtime·thrkill(SB),NOSPLIT,$0-8
-	MOVW	tid+0(FP), R0		// arg 1 - tid
-	MOVW	sig+4(FP), R1		// arg 2 - signum
-	MOVW	$0, R2			// arg 3 - tcb
-	MOVW	$119, R12		// sys_thrkill
-	INVOKE_SYSCALL
-	RET
-
-TEXT runtime·raiseproc(SB),NOSPLIT,$12
-	MOVW	$20, R12		// sys_getpid
-	INVOKE_SYSCALL
-					// arg 1 - pid, already in R0
-	MOVW	sig+0(FP), R1		// arg 2 - signum
-	MOVW	$122, R12		// sys_kill
-	INVOKE_SYSCALL
-	RET
-
-TEXT runtime·mmap(SB),NOSPLIT,$16
-	MOVW	addr+0(FP), R0		// arg 1 - addr
-	MOVW	n+4(FP), R1		// arg 2 - len
-	MOVW	prot+8(FP), R2		// arg 3 - prot
-	MOVW	flags+12(FP), R3	// arg 4 - flags
-	MOVW	fd+16(FP), R4		// arg 5 - fd (on stack)
-	MOVW	R4, 4(R13)
-	MOVW	$0, R5			// arg 6 - pad (on stack)
-	MOVW	R5, 8(R13)
-	MOVW	off+20(FP), R6		// arg 7 - offset (on stack)
-	MOVW	R6, 12(R13)		// lower 32 bits (from Go runtime)
-	MOVW	$0, R7
-	MOVW	R7, 16(R13)		// high 32 bits
-	ADD	$4, R13
-	MOVW	$197, R12		// sys_mmap
-	INVOKE_SYSCALL
-	SUB	$4, R13
-	MOVW	$0, R1
-	MOVW.CS	R0, R1			// if error, move to R1
-	MOVW.CS $0, R0
-	MOVW	R0, p+24(FP)
-	MOVW	R1, err+28(FP)
-	RET
-
-TEXT runtime·munmap(SB),NOSPLIT,$0
-	MOVW	addr+0(FP), R0		// arg 1 - addr
-	MOVW	n+4(FP), R1		// arg 2 - len
-	MOVW	$73, R12		// sys_munmap
-	INVOKE_SYSCALL
-	MOVW.CS	$0, R8			// crash on syscall failure
-	MOVW.CS	R8, (R8)
-	RET
-
-TEXT runtime·madvise(SB),NOSPLIT,$0
-	MOVW	addr+0(FP), R0		// arg 1 - addr
-	MOVW	n+4(FP), R1		// arg 2 - len
-	MOVW	flags+8(FP), R2		// arg 2 - flags
-	MOVW	$75, R12		// sys_madvise
-	INVOKE_SYSCALL
-	MOVW.CS	$-1, R0
-	MOVW	R0, ret+12(FP)
-	RET
-
-TEXT runtime·setitimer(SB),NOSPLIT,$0
-	MOVW	mode+0(FP), R0		// arg 1 - mode
-	MOVW	new+4(FP), R1		// arg 2 - new value
-	MOVW	old+8(FP), R2		// arg 3 - old value
-	MOVW	$69, R12		// sys_setitimer
-	INVOKE_SYSCALL
-	RET
-
-// func walltime() (sec int64, nsec int32)
-TEXT runtime·walltime(SB), NOSPLIT, $32
-	MOVW	CLOCK_REALTIME, R0	// arg 1 - clock_id
-	MOVW	$8(R13), R1		// arg 2 - tp
-	MOVW	$87, R12		// sys_clock_gettime
-	INVOKE_SYSCALL
-
-	MOVW	8(R13), R0		// sec - l32
-	MOVW	12(R13), R1		// sec - h32
-	MOVW	16(R13), R2		// nsec
-
-	MOVW	R0, sec_lo+0(FP)
-	MOVW	R1, sec_hi+4(FP)
-	MOVW	R2, nsec+8(FP)
-
-	RET
-
-// int64 nanotime1(void) so really
-// void nanotime1(int64 *nsec)
-TEXT runtime·nanotime1(SB),NOSPLIT,$32
-	MOVW	CLOCK_MONOTONIC, R0	// arg 1 - clock_id
-	MOVW	$8(R13), R1		// arg 2 - tp
-	MOVW	$87, R12		// sys_clock_gettime
-	INVOKE_SYSCALL
-
-	MOVW	8(R13), R0		// sec - l32
-	MOVW	12(R13), R4		// sec - h32
-	MOVW	16(R13), R2		// nsec
-
-	MOVW	$1000000000, R3
-	MULLU	R0, R3, (R1, R0)
-	MUL	R3, R4
-	ADD.S	R2, R0
-	ADC	R4, R1
-
-	MOVW	R0, ret_lo+0(FP)
-	MOVW	R1, ret_hi+4(FP)
-	RET
-
-TEXT runtime·sigaction(SB),NOSPLIT,$0
-	MOVW	sig+0(FP), R0		// arg 1 - signum
-	MOVW	new+4(FP), R1		// arg 2 - new sigaction
-	MOVW	old+8(FP), R2		// arg 3 - old sigaction
-	MOVW	$46, R12		// sys_sigaction
-	INVOKE_SYSCALL
-	MOVW.CS	$3, R8			// crash on syscall failure
-	MOVW.CS	R8, (R8)
-	RET
-
-TEXT runtime·obsdsigprocmask(SB),NOSPLIT,$0
-	MOVW	how+0(FP), R0		// arg 1 - mode
-	MOVW	new+4(FP), R1		// arg 2 - new
-	MOVW	$48, R12		// sys_sigprocmask
-	INVOKE_SYSCALL
-	MOVW.CS	$3, R8			// crash on syscall failure
-	MOVW.CS	R8, (R8)
-	MOVW	R0, ret+8(FP)
 	RET
 
 TEXT runtime·sigfwd(SB),NOSPLIT,$0-16
 	MOVW	sig+4(FP), R0
 	MOVW	info+8(FP), R1
 	MOVW	ctx+12(FP), R2
-	MOVW	fn+0(FP), R11
-	MOVW	R13, R4
+	MOVW	fn+0(FP), R3
+	MOVW	R13, R9
 	SUB	$24, R13
 	BIC	$0x7, R13 // alignment for ELF ABI
-	BL	(R11)
-	MOVW	R4, R13
+	BL	(R3)
+	MOVW	R9, R13
 	RET
 
 TEXT runtime·sigtramp(SB),NOSPLIT,$0
@@ -267,9 +69,7 @@ TEXT runtime·sigtramp(SB),NOSPLIT,$0
 	// If called from an external code context, g will not be set.
 	// Save R0, since runtime·load_g will clobber it.
 	MOVW	R0, 4(R13)		// signum
-	MOVB	runtime·iscgo(SB), R0
-	CMP	$0, R0
-	BL.NE	runtime·load_g(SB)
+	BL	runtime·load_g(SB)
 
 	MOVW	R1, 8(R13)
 	MOVW	R2, 12(R13)
@@ -281,155 +81,726 @@ TEXT runtime·sigtramp(SB),NOSPLIT,$0
 
 	RET
 
-// int32 tfork(void *param, uintptr psize, M *mp, G *gp, void (*fn)(void));
-TEXT runtime·tfork(SB),NOSPLIT,$0
-
-	// Copy mp, gp and fn off parent stack for use by child.
-	MOVW	mm+8(FP), R4
-	MOVW	gg+12(FP), R5
-	MOVW	fn+16(FP), R6
-
-	MOVW	param+0(FP), R0		// arg 1 - param
-	MOVW	psize+4(FP), R1		// arg 2 - psize
-	MOVW	$8, R12			// sys___tfork
-	INVOKE_SYSCALL
-
-	// Return if syscall failed.
-	B.CC	4(PC)
-	RSB	$0, R0
-	MOVW	R0, ret+20(FP)
-	RET
-
-	// In parent, return.
-	CMP	$0, R0
-	BEQ	3(PC)
-	MOVW	R0, ret+20(FP)
-	RET
-
-	// Initialise m, g.
-	MOVW	R5, g
-	MOVW	R4, g_m(g)
-
-	// Paranoia; check that stack splitting code works.
-	BL	runtime·emptyfunc(SB)
-
-	// Call fn.
-	BL	(R6)
-
-	// fn should never return.
-	MOVW	$2, R8			// crash if reached
-	MOVW	R8, (R8)
-	RET
-
-TEXT runtime·sigaltstack(SB),NOSPLIT,$0
-	MOVW	new+0(FP), R0		// arg 1 - new sigaltstack
-	MOVW	old+4(FP), R1		// arg 2 - old sigaltstack
-	MOVW	$288, R12		// sys_sigaltstack
-	INVOKE_SYSCALL
-	MOVW.CS	$0, R8			// crash on syscall failure
-	MOVW.CS	R8, (R8)
-	RET
-
-TEXT runtime·osyield(SB),NOSPLIT,$0
-	MOVW	$298, R12		// sys_sched_yield
-	INVOKE_SYSCALL
-	RET
-
-TEXT runtime·thrsleep(SB),NOSPLIT,$4
-	MOVW	ident+0(FP), R0		// arg 1 - ident
-	MOVW	clock_id+4(FP), R1	// arg 2 - clock_id
-	MOVW	tsp+8(FP), R2		// arg 3 - tsp
-	MOVW	lock+12(FP), R3		// arg 4 - lock
-	MOVW	abort+16(FP), R4	// arg 5 - abort (on stack)
-	MOVW	R4, 4(R13)
-	ADD	$4, R13
-	MOVW	$94, R12		// sys___thrsleep
-	INVOKE_SYSCALL
-	SUB	$4, R13
-	MOVW	R0, ret+20(FP)
-	RET
-
-TEXT runtime·thrwakeup(SB),NOSPLIT,$0
-	MOVW	ident+0(FP), R0		// arg 1 - ident
-	MOVW	n+4(FP), R1		// arg 2 - n
-	MOVW	$301, R12		// sys___thrwakeup
-	INVOKE_SYSCALL
-	MOVW	R0, ret+8(FP)
-	RET
-
-TEXT runtime·sysctl(SB),NOSPLIT,$8
-	MOVW	mib+0(FP), R0		// arg 1 - mib
-	MOVW	miblen+4(FP), R1	// arg 2 - miblen
-	MOVW	out+8(FP), R2		// arg 3 - out
-	MOVW	size+12(FP), R3		// arg 4 - size
-	MOVW	dst+16(FP), R4		// arg 5 - dest (on stack)
-	MOVW	R4, 4(R13)
-	MOVW	ndst+20(FP), R5		// arg 6 - newlen (on stack)
-	MOVW	R5, 8(R13)
-	ADD	$4, R13
-	MOVW	$202, R12		// sys___sysctl
-	INVOKE_SYSCALL
-	SUB	$4, R13
-	MOVW.CC	$0, R0
-	RSB.CS	$0, R0
-	MOVW	R0, ret+24(FP)
-	RET
-
-// int32 runtime·kqueue(void);
-TEXT runtime·kqueue(SB),NOSPLIT,$0
-	MOVW	$269, R12		// sys_kqueue
-	INVOKE_SYSCALL
-	RSB.CS	$0, R0
-	MOVW	R0, ret+0(FP)
-	RET
-
-// int32 runtime·kevent(int kq, Kevent *changelist, int nchanges, Kevent *eventlist, int nevents, Timespec *timeout);
-TEXT runtime·kevent(SB),NOSPLIT,$8
-	MOVW	kq+0(FP), R0		// arg 1 - kq
-	MOVW	ch+4(FP), R1		// arg 2 - changelist
-	MOVW	nch+8(FP), R2		// arg 3 - nchanges
-	MOVW	ev+12(FP), R3		// arg 4 - eventlist
-	MOVW	nev+16(FP), R4		// arg 5 - nevents (on stack)
-	MOVW	R4, 4(R13)
-	MOVW	ts+20(FP), R5		// arg 6 - timeout (on stack)
-	MOVW	R5, 8(R13)
-	ADD	$4, R13
-	MOVW	$72, R12		// sys_kevent
-	INVOKE_SYSCALL
-	RSB.CS	$0, R0
-	SUB	$4, R13
-	MOVW	R0, ret+24(FP)
-	RET
-
-// func closeonexec(fd int32)
-TEXT runtime·closeonexec(SB),NOSPLIT,$0
-	MOVW	fd+0(FP), R0		// arg 1 - fd
-	MOVW	$2, R1			// arg 2 - cmd (F_SETFD)
-	MOVW	$1, R2			// arg 3 - arg (FD_CLOEXEC)
-	MOVW	$92, R12		// sys_fcntl
-	INVOKE_SYSCALL
-	RET
-
-// func runtime·setNonblock(fd int32)
-TEXT runtime·setNonblock(SB),NOSPLIT,$0-4
-	MOVW	fd+0(FP), R0	// fd
-	MOVW	$3, R1	// F_GETFL
-	MOVW	$0, R2
-	MOVW	$92, R12
-	INVOKE_SYSCALL
-	ORR	$0x4, R0, R2	// O_NONBLOCK
-	MOVW	fd+0(FP), R0	// fd
-	MOVW	$4, R1	// F_SETFL
-	MOVW	$92, R12
-	INVOKE_SYSCALL
-	RET
-
 TEXT ·publicationBarrier(SB),NOSPLIT|NOFRAME,$0-0
 	B	runtime·armPublicationBarrier(SB)
 
+// TODO(jsing): OpenBSD only supports GOARM=7 machines... this
+// should not be needed, however the linker still allows GOARM=5
+// on this platform.
 TEXT runtime·read_tls_fallback(SB),NOSPLIT|NOFRAME,$0
 	MOVM.WP	[R1, R2, R3, R12], (R13)
 	MOVW	$330, R12		// sys___get_tcb
 	INVOKE_SYSCALL
 	MOVM.IAW (R13), [R1, R2, R3, R12]
 	RET
+
+// These trampolines help convert from Go calling convention to C calling convention.
+// They should be called with asmcgocall - note that while asmcgocall does
+// stack alignment, creation of a frame undoes it again.
+// A pointer to the arguments is passed in R0.
+// A single int32 result is returned in R0.
+// (For more results, make an args/results structure.)
+TEXT runtime·pthread_attr_init_trampoline(SB),NOSPLIT,$0
+	MOVW	R13, R9
+	BIC     $0x7, R13		// align for ELF ABI
+	MOVW	0(R0), R0		// arg 1 attr
+	CALL	libc_pthread_attr_init(SB)
+	MOVW	R9, R13
+	RET
+
+TEXT runtime·pthread_attr_destroy_trampoline(SB),NOSPLIT,$0
+	MOVW	R13, R9
+	BIC     $0x7, R13		// align for ELF ABI
+	MOVW	0(R0), R0		// arg 1 attr
+	CALL	libc_pthread_attr_destroy(SB)
+	MOVW	R9, R13
+	RET
+
+TEXT runtime·pthread_attr_getstacksize_trampoline(SB),NOSPLIT,$0
+	MOVW	R13, R9
+	BIC     $0x7, R13		// align for ELF ABI
+	MOVW	4(R0), R1		// arg 2 size
+	MOVW	0(R0), R0		// arg 1 attr
+	CALL	libc_pthread_attr_getstacksize(SB)
+	MOVW	R9, R13
+	RET
+
+TEXT runtime·pthread_attr_setdetachstate_trampoline(SB),NOSPLIT,$0
+	MOVW	R13, R9
+	BIC     $0x7, R13		// align for ELF ABI
+	MOVW	4(R0), R1		// arg 2 state
+	MOVW	0(R0), R0		// arg 1 attr
+	CALL	libc_pthread_attr_setdetachstate(SB)
+	MOVW	R9, R13
+	RET
+
+TEXT runtime·pthread_create_trampoline(SB),NOSPLIT,$0
+	MOVW	R13, R9
+	SUB	$16, R13
+	BIC     $0x7, R13		// align for ELF ABI
+	MOVW	0(R0), R1		// arg 2 attr
+	MOVW	4(R0), R2		// arg 3 start
+	MOVW	8(R0), R3		// arg 4 arg
+	MOVW	R13, R0			// arg 1 &threadid (discarded)
+	CALL	libc_pthread_create(SB)
+	MOVW	R9, R13
+	RET
+
+TEXT runtime·thrkill_trampoline(SB),NOSPLIT,$0
+	MOVW	R13, R9
+	BIC     $0x7, R13		// align for ELF ABI
+	MOVW	4(R0), R1		// arg 2 - signal
+	MOVW	$0, R2			// arg 3 - tcb
+	MOVW	0(R0), R0		// arg 1 - tid
+	CALL	libc_thrkill(SB)
+	MOVW	R9, R13
+	RET
+
+TEXT runtime·thrsleep_trampoline(SB),NOSPLIT,$0
+	MOVW	R13, R9
+	SUB	$16, R13
+	BIC     $0x7, R13		// align for ELF ABI
+	MOVW	4(R0), R1		// arg 2 - clock_id
+	MOVW	8(R0), R2		// arg 3 - abstime
+	MOVW	12(R0), R3		// arg 4 - lock
+	MOVW	16(R0), R4		// arg 5 - abort (on stack)
+	MOVW	R4, 0(R13)
+	MOVW	0(R0), R0		// arg 1 - id
+	CALL	libc_thrsleep(SB)
+	MOVW	R9, R13
+	RET
+
+TEXT runtime·thrwakeup_trampoline(SB),NOSPLIT,$0
+	MOVW	R13, R9
+	BIC     $0x7, R13		// align for ELF ABI
+	MOVW	4(R0), R1		// arg 2 - count
+	MOVW	0(R0), R0		// arg 1 - id
+	CALL	libc_thrwakeup(SB)
+	MOVW	R9, R13
+	RET
+
+TEXT runtime·exit_trampoline(SB),NOSPLIT,$0
+	MOVW	R13, R9
+	BIC     $0x7, R13		// align for ELF ABI
+	MOVW	0(R0), R0		// arg 1 exit status
+	BL	libc_exit(SB)
+	MOVW	$0, R8			// crash on failure
+	MOVW	R8, (R8)
+	MOVW	R9, R13
+	RET
+
+TEXT runtime·getthrid_trampoline(SB),NOSPLIT,$0
+	MOVW	R13, R9
+	MOVW	R0, R8
+	BIC     $0x7, R13		// align for ELF ABI
+	BL	libc_getthrid(SB)
+	MOVW	R0, 0(R8)
+	MOVW	R9, R13
+	RET
+
+TEXT runtime·raiseproc_trampoline(SB),NOSPLIT,$0
+	MOVW	R13, R9
+	BIC     $0x7, R13		// align for ELF ABI
+	MOVW	R0, R4
+	BL	libc_getpid(SB)		// arg 1 pid
+	MOVW	R4, R1			// arg 2 signal
+	BL	libc_kill(SB)
+	MOVW	R9, R13
+	RET
+
+TEXT runtime·sched_yield_trampoline(SB),NOSPLIT,$0
+	MOVW	R13, R9
+	BIC     $0x7, R13		// align for ELF ABI
+	BL	libc_sched_yield(SB)
+	MOVW	R9, R13
+	RET
+
+TEXT runtime·mmap_trampoline(SB),NOSPLIT,$0
+	MOVW	R13, R9
+	SUB	$16, R13
+	BIC     $0x7, R13		// align for ELF ABI
+	MOVW	R0, R8
+	MOVW	4(R0), R1		// arg 2 len
+	MOVW	8(R0), R2		// arg 3 prot
+	MOVW	12(R0), R3		// arg 4 flags
+	MOVW	16(R0), R4		// arg 5 fid (on stack)
+	MOVW	R4, 0(R13)
+	MOVW	$0, R5			// pad (on stack)
+	MOVW	R5, 4(R13)
+	MOVW	20(R0), R6		// arg 6 offset (on stack)
+	MOVW	R6, 8(R13)		// low 32 bits
+	MOVW    $0, R7
+	MOVW	R7, 12(R13)		// high 32 bits
+	MOVW	0(R0), R0		// arg 1 addr
+	BL	libc_mmap(SB)
+	MOVW	$0, R1
+	CMP	$-1, R0
+	BNE	ok
+	BL	libc_errno(SB)
+	MOVW	(R0), R1		// errno
+	MOVW	$0, R0
+ok:
+	MOVW	R0, 24(R8)
+	MOVW	R1, 28(R8)
+	MOVW	R9, R13
+	RET
+
+TEXT runtime·munmap_trampoline(SB),NOSPLIT,$0
+	MOVW	R13, R9
+	BIC     $0x7, R13		// align for ELF ABI
+	MOVW	4(R0), R1		// arg 2 len
+	MOVW	0(R0), R0		// arg 1 addr
+	BL	libc_munmap(SB)
+	CMP	$-1, R0
+	BNE	3(PC)
+	MOVW	$0, R8			// crash on failure
+	MOVW	R8, (R8)
+	MOVW	R9, R13
+	RET
+
+TEXT runtime·madvise_trampoline(SB), NOSPLIT, $0
+	MOVW	R13, R9
+	BIC     $0x7, R13		// align for ELF ABI
+	MOVW	4(R0), R1		// arg 2 len
+	MOVW	8(R0), R2		// arg 3 advice
+	MOVW	0(R0), R0		// arg 1 addr
+	BL	libc_madvise(SB)
+	// ignore failure - maybe pages are locked
+	MOVW	R9, R13
+	RET
+
+TEXT runtime·open_trampoline(SB),NOSPLIT,$0
+	MOVW	R13, R9
+	SUB	$8, R13
+	BIC     $0x7, R13		// align for ELF ABI
+	MOVW	4(R0), R1		// arg 2 - flags
+	MOVW	8(R0), R2		// arg 3 - mode (vararg, on stack)
+	MOVW	R2, 0(R13)
+	MOVW	0(R0), R0		// arg 1 - path
+	MOVW	R13, R4
+	BIC     $0x7, R13		// align for ELF ABI
+	BL	libc_open(SB)
+	MOVW	R9, R13
+	RET
+
+TEXT runtime·close_trampoline(SB),NOSPLIT,$0
+	MOVW	R13, R9
+	BIC     $0x7, R13		// align for ELF ABI
+	MOVW	0(R0), R0		// arg 1 - fd
+	BL	libc_close(SB)
+	MOVW	R9, R13
+	RET
+
+TEXT runtime·read_trampoline(SB),NOSPLIT,$0
+	MOVW	R13, R9
+	BIC     $0x7, R13		// align for ELF ABI
+	MOVW	4(R0), R1		// arg 2 - buf
+	MOVW	8(R0), R2		// arg 3 - count
+	MOVW	0(R0), R0		// arg 1 - fd
+	BL	libc_read(SB)
+	CMP	$-1, R0
+	BNE	noerr
+	BL	libc_errno(SB)
+	MOVW	(R0), R0		// errno
+	RSB.CS	$0, R0			// caller expects negative errno
+noerr:
+	MOVW	R9, R13
+	RET
+
+TEXT runtime·write_trampoline(SB),NOSPLIT,$0
+	MOVW	R13, R9
+	BIC     $0x7, R13		// align for ELF ABI
+	MOVW	4(R0), R1		// arg 2 buf
+	MOVW	8(R0), R2		// arg 3 count
+	MOVW	0(R0), R0		// arg 1 fd
+	BL	libc_write(SB)
+	CMP	$-1, R0
+	BNE	noerr
+	BL	libc_errno(SB)
+	MOVW	(R0), R0		// errno
+	RSB.CS	$0, R0			// caller expects negative errno
+noerr:
+	MOVW	R9, R13
+	RET
+
+TEXT runtime·pipe2_trampoline(SB),NOSPLIT,$0
+	MOVW	R13, R9
+	BIC     $0x7, R13		// align for ELF ABI
+	MOVW	4(R0), R1		// arg 2 flags
+	MOVW	0(R0), R0		// arg 1 filedes
+	BL	libc_pipe2(SB)
+	CMP	$-1, R0
+	BNE	3(PC)
+	BL	libc_errno(SB)
+	MOVW	(R0), R0		// errno
+	RSB.CS	$0, R0			// caller expects negative errno
+	MOVW	R9, R13
+	RET
+
+TEXT runtime·setitimer_trampoline(SB),NOSPLIT,$0
+	MOVW	R13, R9
+	BIC     $0x7, R13		// align for ELF ABI
+	MOVW	4(R0), R1		// arg 2 new
+	MOVW	8(R0), R2		// arg 3 old
+	MOVW	0(R0), R0		// arg 1 which
+	BL	libc_setitimer(SB)
+	MOVW	R9, R13
+	RET
+
+TEXT runtime·usleep_trampoline(SB),NOSPLIT,$0
+	MOVW	R13, R9
+	BIC     $0x7, R13		// align for ELF ABI
+	MOVW	0(R0), R0		// arg 1 usec
+	BL	libc_usleep(SB)
+	MOVW	R9, R13
+	RET
+
+TEXT runtime·sysctl_trampoline(SB),NOSPLIT,$0
+	MOVW	R13, R9
+	SUB	$8, R13
+	BIC     $0x7, R13		// align for ELF ABI
+	MOVW	4(R0), R1		// arg 2 miblen
+	MOVW	8(R0), R2		// arg 3 out
+	MOVW	12(R0), R3		// arg 4 size
+	MOVW	16(R0), R4		// arg 5 dst (on stack)
+	MOVW	R4, 0(R13)
+	MOVW	20(R0), R5		// arg 6 ndst (on stack)
+	MOVW	R5, 4(R13)
+	MOVW	0(R0), R0		// arg 1 mib
+	BL	libc_sysctl(SB)
+	MOVW	R9, R13
+	RET
+
+TEXT runtime·kqueue_trampoline(SB),NOSPLIT,$0
+	MOVW	R13, R9
+	BIC     $0x7, R13		// align for ELF ABI
+	BL	libc_kqueue(SB)
+	MOVW	R9, R13
+	RET
+
+TEXT runtime·kevent_trampoline(SB),NOSPLIT,$0
+	MOVW	R13, R9
+	SUB	$8, R13
+	BIC     $0x7, R13		// align for ELF ABI
+	MOVW	4(R0), R1		// arg 2 keventt
+	MOVW	8(R0), R2		// arg 3 nch
+	MOVW	12(R0), R3		// arg 4 ev
+	MOVW	16(R0), R4		// arg 5 nev (on stack)
+	MOVW	R4, 0(R13)
+	MOVW	20(R0), R5		// arg 6 ts (on stack)
+	MOVW	R5, 4(R13)
+	MOVW	0(R0), R0		// arg 1 kq
+	BL	libc_kevent(SB)
+	CMP	$-1, R0
+	BNE	ok
+	BL	libc_errno(SB)
+	MOVW	(R0), R0		// errno
+	RSB.CS	$0, R0			// caller expects negative errno
+ok:
+	MOVW	R9, R13
+	RET
+
+TEXT runtime·clock_gettime_trampoline(SB),NOSPLIT,$0
+	MOVW	R13, R9
+	BIC     $0x7, R13		// align for ELF ABI
+	MOVW	4(R0), R1		// arg 2 tp
+	MOVW	0(R0), R0		// arg 1 clock_id
+	BL	libc_clock_gettime(SB)
+	CMP	$-1, R0
+	BNE	3(PC)
+	MOVW	$0, R8			// crash on failure
+	MOVW	R8, (R8)
+	MOVW	R9, R13
+	RET
+
+TEXT runtime·fcntl_trampoline(SB),NOSPLIT,$0
+	MOVW	R13, R9
+	SUB	$8, R13
+	BIC     $0x7, R13		// align for ELF ABI
+	MOVW	4(R0), R1		// arg 2 cmd
+	MOVW	8(R0), R2		// arg 3 arg (vararg, on stack)
+	MOVW	R2, 0(R13)
+	MOVW	0(R0), R0		// arg 1 fd
+	BL	libc_fcntl(SB)
+	MOVW	R9, R13
+	RET
+
+TEXT runtime·sigaction_trampoline(SB),NOSPLIT,$0
+	MOVW	R13, R9
+	BIC     $0x7, R13		// align for ELF ABI
+	MOVW	4(R0), R1		// arg 2 new
+	MOVW	8(R0), R2		// arg 3 old
+	MOVW	0(R0), R0		// arg 1 sig
+	BL	libc_sigaction(SB)
+	CMP	$-1, R0
+	BNE	3(PC)
+	MOVW	$0, R8			// crash on failure
+	MOVW	R8, (R8)
+	MOVW	R9, R13
+	RET
+
+TEXT runtime·sigprocmask_trampoline(SB),NOSPLIT,$0
+	MOVW	R13, R9
+	BIC     $0x7, R13		// align for ELF ABI
+	MOVW	4(R0), R1		// arg 2 new
+	MOVW	8(R0), R2		// arg 3 old
+	MOVW	0(R0), R0		// arg 1 how
+	BL	libc_pthread_sigmask(SB)
+	CMP	$-1, R0
+	BNE	3(PC)
+	MOVW	$0, R8			// crash on failure
+	MOVW	R8, (R8)
+	MOVW	R9, R13
+	RET
+
+TEXT runtime·sigaltstack_trampoline(SB),NOSPLIT,$0
+	MOVW	R13, R9
+	BIC     $0x7, R13		// align for ELF ABI
+	MOVW	4(R0), R1		// arg 2 old
+	MOVW	0(R0), R0		// arg 1 new
+	BL	libc_sigaltstack(SB)
+	CMP	$-1, R0
+	BNE	3(PC)
+	MOVW	$0, R8			// crash on failure
+	MOVW	R8, (R8)
+	MOVW	R9, R13
+	RET
+
+// syscall calls a function in libc on behalf of the syscall package.
+// syscall takes a pointer to a struct like:
+// struct {
+//	fn    uintptr
+//	a1    uintptr
+//	a2    uintptr
+//	a3    uintptr
+//	r1    uintptr
+//	r2    uintptr
+//	err   uintptr
+// }
+// syscall must be called on the g0 stack with the
+// C calling convention (use libcCall).
+//
+// syscall expects a 32-bit result and tests for 32-bit -1
+// to decide there was an error.
+TEXT runtime·syscall(SB),NOSPLIT,$0
+	MOVW	R13, R9
+	BIC     $0x7, R13		// align for ELF ABI
+
+	MOVW	R0, R8
+
+	MOVW	(0*4)(R8), R7 // fn
+	MOVW	(1*4)(R8), R0 // a1
+	MOVW	(2*4)(R8), R1 // a2
+	MOVW	(3*4)(R8), R2 // a3
+
+	BL	(R7)
+
+	MOVW	R0, (4*4)(R8) // r1
+	MOVW	R1, (5*4)(R8) // r2
+
+	// Standard libc functions return -1 on error and set errno.
+	CMP	$-1, R0
+	BNE	ok
+
+	// Get error code from libc.
+	BL	libc_errno(SB)
+	MOVW	(R0), R1
+	MOVW	R1, (6*4)(R8) // err
+
+ok:
+	MOVW	$0, R0		// no error (it's ignored anyway)
+	MOVW	R9, R13
+	RET
+
+// syscallX calls a function in libc on behalf of the syscall package.
+// syscallX takes a pointer to a struct like:
+// struct {
+//	fn    uintptr
+//	a1    uintptr
+//	a2    uintptr
+//	a3    uintptr
+//	r1    uintptr
+//	r2    uintptr
+//	err   uintptr
+// }
+// syscallX must be called on the g0 stack with the
+// C calling convention (use libcCall).
+//
+// syscallX is like syscall but expects a 64-bit result
+// and tests for 64-bit -1 to decide there was an error.
+TEXT runtime·syscallX(SB),NOSPLIT,$0
+	MOVW	R13, R9
+	BIC     $0x7, R13		// align for ELF ABI
+
+	MOVW	R0, R8
+
+	MOVW	(0*4)(R8), R7 // fn
+	MOVW	(1*4)(R8), R0 // a1
+	MOVW	(2*4)(R8), R1 // a2
+	MOVW	(3*4)(R8), R2 // a3
+
+	BL	(R7)
+
+	MOVW	R0, (4*4)(R8) // r1
+	MOVW	R1, (5*4)(R8) // r2
+
+	// Standard libc functions return -1 on error and set errno.
+	CMP	$-1, R0
+	BNE	ok
+	CMP	$-1, R1
+	BNE	ok
+
+	// Get error code from libc.
+	BL	libc_errno(SB)
+	MOVW	(R0), R1
+	MOVW	R1, (6*4)(R8) // err
+
+ok:
+	MOVW	$0, R0		// no error (it's ignored anyway)
+	MOVW	R9, R13
+	RET
+
+// syscall6 calls a function in libc on behalf of the syscall package.
+// syscall6 takes a pointer to a struct like:
+// struct {
+//	fn    uintptr
+//	a1    uintptr
+//	a2    uintptr
+//	a3    uintptr
+//	a4    uintptr
+//	a5    uintptr
+//	a6    uintptr
+//	r1    uintptr
+//	r2    uintptr
+//	err   uintptr
+// }
+// syscall6 must be called on the g0 stack with the
+// C calling convention (use libcCall).
+//
+// syscall6 expects a 32-bit result and tests for 32-bit -1
+// to decide there was an error.
+TEXT runtime·syscall6(SB),NOSPLIT,$0
+	MOVW	R13, R9
+	SUB	$8, R13
+	BIC     $0x7, R13		// align for ELF ABI
+
+	MOVW	R0, R8
+
+	MOVW	(0*4)(R8), R7 // fn
+	MOVW	(1*4)(R8), R0 // a1
+	MOVW	(2*4)(R8), R1 // a2
+	MOVW	(3*4)(R8), R2 // a3
+	MOVW	(4*4)(R8), R3 // a4
+	MOVW	(5*4)(R8), R4 // a5
+	MOVW	R4, 0(R13)
+	MOVW	(6*4)(R8), R5 // a6
+	MOVW	R5, 4(R13)
+
+	BL	(R7)
+
+	MOVW	R0, (7*4)(R8) // r1
+	MOVW	R1, (8*4)(R8) // r2
+
+	// Standard libc functions return -1 on error and set errno.
+	CMP	$-1, R0
+	BNE	ok
+
+	// Get error code from libc.
+	BL	libc_errno(SB)
+	MOVW	(R0), R1
+	MOVW	R1, (9*4)(R8) // err
+
+ok:
+	MOVW	$0, R0		// no error (it's ignored anyway)
+	MOVW	R9, R13
+	RET
+
+// syscall6X calls a function in libc on behalf of the syscall package.
+// syscall6X takes a pointer to a struct like:
+// struct {
+//	fn    uintptr
+//	a1    uintptr
+//	a2    uintptr
+//	a3    uintptr
+//	a4    uintptr
+//	a5    uintptr
+//	a6    uintptr
+//	r1    uintptr
+//	r2    uintptr
+//	err   uintptr
+// }
+// syscall6X must be called on the g0 stack with the
+// C calling convention (use libcCall).
+//
+// syscall6X is like syscall6 but expects a 64-bit result
+// and tests for 64-bit -1 to decide there was an error.
+TEXT runtime·syscall6X(SB),NOSPLIT,$0
+	MOVW	R13, R9
+	SUB	$8, R13
+	BIC     $0x7, R13		// align for ELF ABI
+
+	MOVW	R0, R8
+
+	MOVW	(0*4)(R8), R7 // fn
+	MOVW	(1*4)(R8), R0 // a1
+	MOVW	(2*4)(R8), R1 // a2
+	MOVW	(3*4)(R8), R2 // a3
+	MOVW	(4*4)(R8), R3 // a4
+	MOVW	(5*4)(R8), R4 // a5
+	MOVW	R4, 0(R13)
+	MOVW	(6*4)(R8), R5 // a6
+	MOVW	R5, 4(R13)
+
+	BL	(R7)
+
+	MOVW	R0, (7*4)(R8) // r1
+	MOVW	R1, (8*4)(R8) // r2
+
+	// Standard libc functions return -1 on error and set errno.
+	CMP	$-1, R0
+	BNE	ok
+	CMP	$-1, R1
+	BNE	ok
+
+	// Get error code from libc.
+	BL	libc_errno(SB)
+	MOVW	(R0), R1
+	MOVW	R1, (9*4)(R8) // err
+
+ok:
+	MOVW	$0, R0		// no error (it's ignored anyway)
+	MOVW	R9, R13
+	RET
+
+// syscall10 calls a function in libc on behalf of the syscall package.
+// syscall10 takes a pointer to a struct like:
+// struct {
+//	fn    uintptr
+//	a1    uintptr
+//	a2    uintptr
+//	a3    uintptr
+//	a4    uintptr
+//	a5    uintptr
+//	a6    uintptr
+//	a7    uintptr
+//	a8    uintptr
+//	a9    uintptr
+//	a10   uintptr
+//	r1    uintptr
+//	r2    uintptr
+//	err   uintptr
+// }
+// syscall10 must be called on the g0 stack with the
+// C calling convention (use libcCall).
+TEXT runtime·syscall10(SB),NOSPLIT,$0
+	MOVW	R13, R9
+	SUB	$24, R13
+	BIC     $0x7, R13		// align for ELF ABI
+
+	MOVW	R0, R8
+
+	MOVW	(0*4)(R8), R7 // fn
+	MOVW	(1*4)(R8), R0 // a1
+	MOVW	(2*4)(R8), R1 // a2
+	MOVW	(3*4)(R8), R2 // a3
+	MOVW	(4*4)(R8), R3 // a4
+	MOVW	(5*4)(R8), R4 // a5
+	MOVW	R4, 0(R13)
+	MOVW	(6*4)(R8), R5 // a6
+	MOVW	R5, 4(R13)
+	MOVW	(7*4)(R8), R6 // a7
+	MOVW	R6, 8(R13)
+	MOVW	(8*4)(R8), R4 // a8
+	MOVW	R4, 12(R13)
+	MOVW	(9*4)(R8), R5 // a9
+	MOVW	R5, 16(R13)
+	MOVW	(10*4)(R8), R6 // a10
+	MOVW	R6, 20(R13)
+
+	BL	(R7)
+
+	MOVW	R0, (11*4)(R8) // r1
+	MOVW	R1, (12*4)(R8) // r2
+
+	// Standard libc functions return -1 on error and set errno.
+	CMP	$-1, R0
+	BNE	ok
+
+	// Get error code from libc.
+	BL	libc_errno(SB)
+	MOVW	(R0), R1
+	MOVW	R1, (13*4)(R8) // err
+
+ok:
+	MOVW	$0, R0		// no error (it's ignored anyway)
+	MOVW	R9, R13
+	RET
+
+// syscall10X calls a function in libc on behalf of the syscall package.
+// syscall10X takes a pointer to a struct like:
+// struct {
+//	fn    uintptr
+//	a1    uintptr
+//	a2    uintptr
+//	a3    uintptr
+//	a4    uintptr
+//	a5    uintptr
+//	a6    uintptr
+//	a7    uintptr
+//	a8    uintptr
+//	a9    uintptr
+//	a10   uintptr
+//	r1    uintptr
+//	r2    uintptr
+//	err   uintptr
+// }
+// syscall10X must be called on the g0 stack with the
+// C calling convention (use libcCall).
+//
+// syscall10X is like syscall10 but expects a 64-bit result
+// and tests for 64-bit -1 to decide there was an error.
+TEXT runtime·syscall10X(SB),NOSPLIT,$0
+	MOVW	R13, R9
+	SUB	$24, R13
+	BIC     $0x7, R13		// align for ELF ABI
+
+	MOVW	R0, R8
+
+	MOVW	(0*4)(R8), R7 // fn
+	MOVW	(1*4)(R8), R0 // a1
+	MOVW	(2*4)(R8), R1 // a2
+	MOVW	(3*4)(R8), R2 // a3
+	MOVW	(4*4)(R8), R3 // a4
+	MOVW	(5*4)(R8), R4 // a5
+	MOVW	R4, 0(R13)
+	MOVW	(6*4)(R8), R5 // a6
+	MOVW	R5, 4(R13)
+	MOVW	(7*4)(R8), R6 // a7
+	MOVW	R6, 8(R13)
+	MOVW	(8*4)(R8), R4 // a8
+	MOVW	R4, 12(R13)
+	MOVW	(9*4)(R8), R5 // a9
+	MOVW	R5, 16(R13)
+	MOVW	(10*4)(R8), R6 // a10
+	MOVW	R6, 20(R13)
+
+	BL	(R7)
+
+	MOVW	R0, (11*4)(R8) // r1
+	MOVW	R1, (12*4)(R8) // r2
+
+	// Standard libc functions return -1 on error and set errno.
+	CMP	$-1, R0
+	BNE	ok
+	CMP	$-1, R1
+	BNE	ok
+
+	// Get error code from libc.
+	BL	libc_errno(SB)
+	MOVW	(R0), R1
+	MOVW	R1, (13*4)(R8) // err
+
+ok:
+	MOVW	$0, R0		// no error (it's ignored anyway)
+	MOVW	R9, R13
+	RET
diff --git a/src/runtime/syscall_windows.go b/src/runtime/syscall_windows.go
index 6b9195bcd5..4763a440e7 100644
--- a/src/runtime/syscall_windows.go
+++ b/src/runtime/syscall_windows.go
@@ -64,6 +64,7 @@ type abiDesc struct {
 
 	srcStackSize uintptr // stdcall/fastcall stack space tracking
 	dstStackSize uintptr // Go stack space used
+	dstSpill     uintptr // Extra stack space for argument spill slots
 	dstRegisters int     // Go ABI int argument registers used
 
 	// retOffset is the offset of the uintptr-sized result in the Go
@@ -110,7 +111,14 @@ func (p *abiDesc) assignArg(t *_type) {
 	// arguments. The same is true on arm.
 
 	oldParts := p.parts
-	if !p.tryRegAssignArg(t, 0) {
+	if p.tryRegAssignArg(t, 0) {
+		// Account for spill space.
+		//
+		// TODO(mknyszek): Remove this when we no longer have
+		// caller reserved spill space.
+		p.dstSpill = alignUp(p.dstSpill, uintptr(t.align))
+		p.dstSpill += t.size
+	} else {
 		// Register assignment failed.
 		// Undo the work and stack assign.
 		p.parts = oldParts
@@ -277,7 +285,11 @@ func compileCallback(fn eface, cdecl bool) (code uintptr) {
 		abiMap.dstStackSize += sys.PtrSize
 	}
 
-	if abiMap.dstStackSize > callbackMaxFrame {
+	// TODO(mknyszek): Remove dstSpill from this calculation when we no longer have
+	// caller reserved spill space.
+	frameSize := alignUp(abiMap.dstStackSize, sys.PtrSize)
+	frameSize += abiMap.dstSpill
+	if frameSize > callbackMaxFrame {
 		panic("compileCallback: function argument frame too large")
 	}
 
@@ -356,9 +368,14 @@ func callbackWrap(a *callbackArgs) {
 		}
 	}
 
+	// TODO(mknyszek): Remove this when we no longer have
+	// caller reserved spill space.
+	frameSize := alignUp(c.abiMap.dstStackSize, sys.PtrSize)
+	frameSize += c.abiMap.dstSpill
+
 	// Even though this is copying back results, we can pass a nil
 	// type because those results must not require write barriers.
-	reflectcall(nil, unsafe.Pointer(c.fn), noescape(goArgs), uint32(c.abiMap.dstStackSize), uint32(c.abiMap.retOffset), uint32(c.abiMap.dstStackSize), ®s)
+	reflectcall(nil, unsafe.Pointer(c.fn), noescape(goArgs), uint32(c.abiMap.dstStackSize), uint32(c.abiMap.retOffset), uint32(frameSize), ®s)
 
 	// Extract the result.
 	//
diff --git a/src/runtime/syscall_windows_test.go b/src/runtime/syscall_windows_test.go
index 5e9694d444..e3f772ac4b 100644
--- a/src/runtime/syscall_windows_test.go
+++ b/src/runtime/syscall_windows_test.go
@@ -389,6 +389,10 @@ var cbFuncs = []cbFunc{
 	{func(i1, i2, i3, i4, i5 uint8Pair) uintptr {
 		return uintptr(i1.x + i1.y + i2.x + i2.y + i3.x + i3.y + i4.x + i4.y + i5.x + i5.y)
 	}},
+	{func(i1, i2, i3, i4, i5, i6, i7, i8, i9 uint32) uintptr {
+		runtime.GC()
+		return uintptr(i1 + i2 + i3 + i4 + i5 + i6 + i7 + i8 + i9)
+	}},
 }
 
 //go:registerparams
@@ -461,6 +465,16 @@ func sum5andPair(i1, i2, i3, i4, i5 uint8Pair) uintptr {
 	return uintptr(i1.x + i1.y + i2.x + i2.y + i3.x + i3.y + i4.x + i4.y + i5.x + i5.y)
 }
 
+// This test forces a GC. The idea is to have enough arguments
+// that insufficient spill slots allocated (according to the ABI)
+// may cause compiler-generated spills to clobber the return PC.
+// Then, the GC stack scanning will catch that.
+//go:registerparams
+func sum9andGC(i1, i2, i3, i4, i5, i6, i7, i8, i9 uint32) uintptr {
+	runtime.GC()
+	return uintptr(i1 + i2 + i3 + i4 + i5 + i6 + i7 + i8 + i9)
+}
+
 // TODO(register args): Remove this once we switch to using the register
 // calling convention by default, since this is redundant with the existing
 // tests.
@@ -479,6 +493,7 @@ var cbFuncsRegABI = []cbFunc{
 	{sum9int8},
 	{sum5mix},
 	{sum5andPair},
+	{sum9andGC},
 }
 
 func getCallbackTestFuncs() []cbFunc {
diff --git a/src/runtime/testdata/testprog/checkptr.go b/src/runtime/testdata/testprog/checkptr.go
index e0a2794f4c..9c5561396e 100644
--- a/src/runtime/testdata/testprog/checkptr.go
+++ b/src/runtime/testdata/testprog/checkptr.go
@@ -4,15 +4,22 @@
 
 package main
 
-import "unsafe"
+import (
+	"runtime"
+	"time"
+	"unsafe"
+)
 
 func init() {
 	register("CheckPtrAlignmentNoPtr", CheckPtrAlignmentNoPtr)
 	register("CheckPtrAlignmentPtr", CheckPtrAlignmentPtr)
+	register("CheckPtrAlignmentNilPtr", CheckPtrAlignmentNilPtr)
 	register("CheckPtrArithmetic", CheckPtrArithmetic)
 	register("CheckPtrArithmetic2", CheckPtrArithmetic2)
 	register("CheckPtrSize", CheckPtrSize)
 	register("CheckPtrSmall", CheckPtrSmall)
+	register("CheckPtrSliceOK", CheckPtrSliceOK)
+	register("CheckPtrSliceFail", CheckPtrSliceFail)
 }
 
 func CheckPtrAlignmentNoPtr() {
@@ -27,6 +34,35 @@ func CheckPtrAlignmentPtr() {
 	sink2 = (**int64)(unsafe.Pointer(uintptr(p) + 1))
 }
 
+// CheckPtrAlignmentNilPtr tests that checkptrAlignment doesn't crash
+// on nil pointers (#47430).
+func CheckPtrAlignmentNilPtr() {
+	var do func(int)
+	do = func(n int) {
+		// Inflate the stack so runtime.shrinkstack gets called during GC
+		if n > 0 {
+			do(n - 1)
+		}
+
+		var p unsafe.Pointer
+		_ = (*int)(p)
+	}
+
+	go func() {
+		for {
+			runtime.GC()
+		}
+	}()
+
+	go func() {
+		for i := 0; ; i++ {
+			do(i % 1024)
+		}
+	}()
+
+	time.Sleep(time.Second)
+}
+
 func CheckPtrArithmetic() {
 	var x int
 	i := uintptr(unsafe.Pointer(&x))
@@ -49,3 +85,14 @@ func CheckPtrSize() {
 func CheckPtrSmall() {
 	sink2 = unsafe.Pointer(uintptr(1))
 }
+
+func CheckPtrSliceOK() {
+	p := new([4]int64)
+	sink2 = unsafe.Slice(&p[1], 3)
+}
+
+func CheckPtrSliceFail() {
+	p := new(int64)
+	sink2 = p
+	sink2 = unsafe.Slice(p, 100)
+}
diff --git a/src/runtime/testdata/testprogcgo/aprof.go b/src/runtime/testdata/testprogcgo/aprof.go
index aabca9e1eb..44a15b0865 100644
--- a/src/runtime/testdata/testprogcgo/aprof.go
+++ b/src/runtime/testdata/testprogcgo/aprof.go
@@ -10,7 +10,7 @@ package main
 // The test fails when the function is the first C function.
 // The exported functions are the first C functions, so we use that.
 
-// extern void GoNop();
+// extern void CallGoNop();
 import "C"
 
 import (
@@ -38,7 +38,7 @@ func CgoCCodeSIGPROF() {
 					break
 				}
 			}
-			C.GoNop()
+			C.CallGoNop()
 		}
 		c <- true
 	}()
diff --git a/src/runtime/testdata/testprogcgo/aprof_c.c b/src/runtime/testdata/testprogcgo/aprof_c.c
new file mode 100644
index 0000000000..d588e13045
--- /dev/null
+++ b/src/runtime/testdata/testprogcgo/aprof_c.c
@@ -0,0 +1,9 @@
+// Copyright 2021 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+#include "_cgo_export.h"
+
+void CallGoNop() {
+	GoNop();
+}
diff --git a/src/runtime/testdata/testprogcgo/bigstack1_windows.c b/src/runtime/testdata/testprogcgo/bigstack1_windows.c
new file mode 100644
index 0000000000..551fb68309
--- /dev/null
+++ b/src/runtime/testdata/testprogcgo/bigstack1_windows.c
@@ -0,0 +1,12 @@
+// Copyright 2021 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// This is not in bigstack_windows.c because it needs to be part of
+// testprogcgo but is not part of the DLL built from bigstack_windows.c.
+
+#include "_cgo_export.h"
+
+void CallGoBigStack1(char* p) {
+	goBigStack1(p);
+}
diff --git a/src/runtime/testdata/testprogcgo/bigstack_windows.go b/src/runtime/testdata/testprogcgo/bigstack_windows.go
index f58fcf993f..135b5fcfe0 100644
--- a/src/runtime/testdata/testprogcgo/bigstack_windows.go
+++ b/src/runtime/testdata/testprogcgo/bigstack_windows.go
@@ -6,7 +6,7 @@ package main
 
 /*
 typedef void callback(char*);
-extern void goBigStack1(char*);
+extern void CallGoBigStack1(char*);
 extern void bigStack(callback*);
 */
 import "C"
@@ -18,7 +18,7 @@ func init() {
 func BigStack() {
 	// Create a large thread stack and call back into Go to test
 	// if Go correctly determines the stack bounds.
-	C.bigStack((*C.callback)(C.goBigStack1))
+	C.bigStack((*C.callback)(C.CallGoBigStack1))
 }
 
 //export goBigStack1
diff --git a/src/runtime/testdata/testprogcgo/tracebackctxt.go b/src/runtime/testdata/testprogcgo/tracebackctxt.go
index 51fa4ad25c..62ff8eccd6 100644
--- a/src/runtime/testdata/testprogcgo/tracebackctxt.go
+++ b/src/runtime/testdata/testprogcgo/tracebackctxt.go
@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// The __attribute__((weak)) used below doesn't seem to work on Windows.
-
 package main
 
 // Test the context argument to SetCgoTraceback.
@@ -14,20 +12,24 @@ package main
 extern void C1(void);
 extern void C2(void);
 extern void tcContext(void*);
+extern void tcContextSimple(void*);
 extern void tcTraceback(void*);
 extern void tcSymbolizer(void*);
 extern int getContextCount(void);
+extern void TracebackContextPreemptionCallGo(int);
 */
 import "C"
 
 import (
 	"fmt"
 	"runtime"
+	"sync"
 	"unsafe"
 )
 
 func init() {
 	register("TracebackContext", TracebackContext)
+	register("TracebackContextPreemption", TracebackContextPreemption)
 }
 
 var tracebackOK bool
@@ -105,3 +107,30 @@ wantLoop:
 		tracebackOK = false
 	}
 }
+
+// Issue 47441.
+func TracebackContextPreemption() {
+	runtime.SetCgoTraceback(0, unsafe.Pointer(C.tcTraceback), unsafe.Pointer(C.tcContextSimple), unsafe.Pointer(C.tcSymbolizer))
+
+	const funcs = 10
+	const calls = 1e5
+	var wg sync.WaitGroup
+	for i := 0; i < funcs; i++ {
+		wg.Add(1)
+		go func(i int) {
+			defer wg.Done()
+			for j := 0; j < calls; j++ {
+				C.TracebackContextPreemptionCallGo(C.int(i*calls + j))
+			}
+		}(i)
+	}
+	wg.Wait()
+
+	fmt.Println("OK")
+}
+
+//export TracebackContextPreemptionGoFunction
+func TracebackContextPreemptionGoFunction(i C.int) {
+	// Do some busy work.
+	fmt.Sprintf("%d\n", i)
+}
diff --git a/src/runtime/testdata/testprogcgo/tracebackctxt_c.c b/src/runtime/testdata/testprogcgo/tracebackctxt_c.c
index 900cada0d3..910cb7b899 100644
--- a/src/runtime/testdata/testprogcgo/tracebackctxt_c.c
+++ b/src/runtime/testdata/testprogcgo/tracebackctxt_c.c
@@ -11,6 +11,7 @@
 // Functions exported from Go.
 extern void G1(void);
 extern void G2(void);
+extern void TracebackContextPreemptionGoFunction(int);
 
 void C1() {
 	G1();
@@ -62,10 +63,17 @@ void tcContext(void* parg) {
 	}
 }
 
+void tcContextSimple(void* parg) {
+	struct cgoContextArg* arg = (struct cgoContextArg*)(parg);
+	if (arg->context == 0) {
+		arg->context = 1;
+	}
+}
+
 void tcTraceback(void* parg) {
 	int base, i;
 	struct cgoTracebackArg* arg = (struct cgoTracebackArg*)(parg);
-	if (arg->context == 0) {
+	if (arg->context == 0 && arg->sigContext == 0) {
 		// This shouldn't happen in this program.
 		abort();
 	}
@@ -89,3 +97,7 @@ void tcSymbolizer(void *parg) {
 	arg->func = "cFunction";
 	arg->lineno = arg->pc + (arg->more << 16);
 }
+
+void TracebackContextPreemptionCallGo(int i) {
+	TracebackContextPreemptionGoFunction(i);
+}
diff --git a/src/runtime/testdata/testwinlibsignal/main.c b/src/runtime/testdata/testwinlibsignal/main.c
index 1787fef3b9..37f24823e6 100644
--- a/src/runtime/testdata/testwinlibsignal/main.c
+++ b/src/runtime/testdata/testwinlibsignal/main.c
@@ -19,13 +19,13 @@ int main(void)
 {
     waitForCtrlBreakEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
     if (!waitForCtrlBreakEvent) {
-        fprintf(stderr, "ERROR: Could not create event");
+        fprintf(stderr, "ERROR: Could not create event\n");
         return 1;
     }
 
     if (!SetConsoleCtrlHandler(CtrlHandler, TRUE))
     {
-        fprintf(stderr, "ERROR: Could not set control handler");
+        fprintf(stderr, "ERROR: Could not set control handler\n");
         return 1;
     }
 
@@ -34,7 +34,14 @@ int main(void)
     // This way the library handler gets called first.
     HMODULE dummyDll = LoadLibrary("dummy.dll");
     if (!dummyDll) {
-        fprintf(stderr, "ERROR: Could not load dummy.dll");
+        fprintf(stderr, "ERROR: Could not load dummy.dll\n");
+        return 1;
+    }
+
+    // Call the Dummy function so that Go initialization completes, since
+    // all cgo entry points call out to _cgo_wait_runtime_init_done.
+    if (((int(*)(void))GetProcAddress(dummyDll, "Dummy"))() != 42) {
+        fprintf(stderr, "ERROR: Dummy function did not return 42\n");
         return 1;
     }
 
@@ -42,7 +49,7 @@ int main(void)
     fflush(stdout);
 
     if (WaitForSingleObject(waitForCtrlBreakEvent, 5000) != WAIT_OBJECT_0) {
-        fprintf(stderr, "FAILURE: No signal received");
+        fprintf(stderr, "FAILURE: No signal received\n");
         return 1;
     }
 
diff --git a/src/runtime/time.go b/src/runtime/time.go
index dee6a674e4..666b242316 100644
--- a/src/runtime/time.go
+++ b/src/runtime/time.go
@@ -333,7 +333,6 @@ func deltimer(t *timer) bool {
 				// Must fetch t.pp before setting status
 				// to timerDeleted.
 				tpp := t.pp.ptr()
-				atomic.Xadd(&tpp.adjustTimers, -1)
 				if !atomic.Cas(&t.status, timerModifying, timerDeleted) {
 					badTimer()
 				}
@@ -510,20 +509,9 @@ loop:
 
 		tpp := t.pp.ptr()
 
-		// Update the adjustTimers field.  Subtract one if we
-		// are removing a timerModifiedEarlier, add one if we
-		// are adding a timerModifiedEarlier.
-		adjust := int32(0)
-		if status == timerModifiedEarlier {
-			adjust--
-		}
 		if newStatus == timerModifiedEarlier {
-			adjust++
 			updateTimerModifiedEarliest(tpp, when)
 		}
-		if adjust != 0 {
-			atomic.Xadd(&tpp.adjustTimers, adjust)
-		}
 
 		// Set the new status of the timer.
 		if !atomic.Cas(&t.status, timerModifying, newStatus) {
@@ -591,9 +579,6 @@ func cleantimers(pp *p) {
 			// Move t to the right position.
 			dodeltimer0(pp)
 			doaddtimer(pp, t)
-			if s == timerModifiedEarlier {
-				atomic.Xadd(&pp.adjustTimers, -1)
-			}
 			if !atomic.Cas(&t.status, timerMoving, timerWaiting) {
 				badTimer()
 			}
@@ -664,37 +649,23 @@ func moveTimers(pp *p, timers []*timer) {
 // it also moves timers that have been modified to run later,
 // and removes deleted timers. The caller must have locked the timers for pp.
 func adjusttimers(pp *p, now int64) {
-	if atomic.Load(&pp.adjustTimers) == 0 {
-		if verifyTimers {
-			verifyTimerHeap(pp)
-		}
-		// There are no timers to adjust, so it is safe to clear
-		// timerModifiedEarliest. Do so in case it is stale.
-		// Everything will work if we don't do this,
-		// but clearing here may save future calls to adjusttimers.
-		atomic.Store64(&pp.timerModifiedEarliest, 0)
-		return
-	}
-
 	// If we haven't yet reached the time of the first timerModifiedEarlier
 	// timer, don't do anything. This speeds up programs that adjust
 	// a lot of timers back and forth if the timers rarely expire.
 	// We'll postpone looking through all the adjusted timers until
 	// one would actually expire.
-	if first := atomic.Load64(&pp.timerModifiedEarliest); first != 0 {
-		if int64(first) > now {
-			if verifyTimers {
-				verifyTimerHeap(pp)
-			}
-			return
+	first := atomic.Load64(&pp.timerModifiedEarliest)
+	if first == 0 || int64(first) > now {
+		if verifyTimers {
+			verifyTimerHeap(pp)
 		}
-
-		// We are going to clear all timerModifiedEarlier timers.
-		atomic.Store64(&pp.timerModifiedEarliest, 0)
+		return
 	}
 
+	// We are going to clear all timerModifiedEarlier timers.
+	atomic.Store64(&pp.timerModifiedEarliest, 0)
+
 	var moved []*timer
-loop:
 	for i := 0; i < len(pp.timers); i++ {
 		t := pp.timers[i]
 		if t.pp.ptr() != pp {
@@ -721,11 +692,6 @@ loop:
 				// loop to skip some other timer.
 				dodeltimer(pp, i)
 				moved = append(moved, t)
-				if s == timerModifiedEarlier {
-					if n := atomic.Xadd(&pp.adjustTimers, -1); int32(n) <= 0 {
-						break loop
-					}
-				}
 				// Look at this heap position again.
 				i--
 			}
@@ -824,9 +790,6 @@ func runtimer(pp *p, now int64) int64 {
 			t.when = t.nextwhen
 			dodeltimer0(pp)
 			doaddtimer(pp, t)
-			if s == timerModifiedEarlier {
-				atomic.Xadd(&pp.adjustTimers, -1)
-			}
 			if !atomic.Cas(&t.status, timerMoving, timerWaiting) {
 				badTimer()
 			}
@@ -921,7 +884,6 @@ func clearDeletedTimers(pp *p) {
 	atomic.Store64(&pp.timerModifiedEarliest, 0)
 
 	cdel := int32(0)
-	cearlier := int32(0)
 	to := 0
 	changedHeap := false
 	timers := pp.timers
@@ -946,9 +908,6 @@ nextTimer:
 					if !atomic.Cas(&t.status, timerMoving, timerWaiting) {
 						badTimer()
 					}
-					if s == timerModifiedEarlier {
-						cearlier++
-					}
 					continue nextTimer
 				}
 			case timerDeleted:
@@ -985,7 +944,6 @@ nextTimer:
 
 	atomic.Xadd(&pp.deletedTimers, -cdel)
 	atomic.Xadd(&pp.numTimers, -cdel)
-	atomic.Xadd(&pp.adjustTimers, -cearlier)
 
 	timers = timers[:to]
 	pp.timers = timers
diff --git a/src/runtime/tls_arm.s b/src/runtime/tls_arm.s
index e42de8deb4..879caac9e1 100644
--- a/src/runtime/tls_arm.s
+++ b/src/runtime/tls_arm.s
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build !windows
 // +build !windows
 
 #include "go_asm.h"
diff --git a/src/runtime/tls_mips64x.s b/src/runtime/tls_mips64x.s
index 888c0efec6..779d64ba31 100644
--- a/src/runtime/tls_mips64x.s
+++ b/src/runtime/tls_mips64x.s
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build mips64 || mips64le
 // +build mips64 mips64le
 
 #include "go_asm.h"
diff --git a/src/runtime/tls_mipsx.s b/src/runtime/tls_mipsx.s
index d2ffcd954c..ada8d06a9e 100644
--- a/src/runtime/tls_mipsx.s
+++ b/src/runtime/tls_mipsx.s
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build mips || mipsle
 // +build mips mipsle
 
 #include "go_asm.h"
diff --git a/src/runtime/tls_ppc64x.s b/src/runtime/tls_ppc64x.s
index 25d796fcc6..7e935d0eb2 100644
--- a/src/runtime/tls_ppc64x.s
+++ b/src/runtime/tls_ppc64x.s
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build ppc64 || ppc64le
 // +build ppc64 ppc64le
 
 #include "go_asm.h"
diff --git a/src/runtime/traceback.go b/src/runtime/traceback.go
index 167d51c452..814c323634 100644
--- a/src/runtime/traceback.go
+++ b/src/runtime/traceback.go
@@ -56,8 +56,6 @@ func tracebackdefers(gp *g, callback func(*stkframe, unsafe.Pointer) bool, v uns
 	}
 }
 
-const sizeofSkipFunction = 256
-
 // Generic traceback. Handles runtime stack prints (pcbuf == nil),
 // the runtime.Callers function (pcbuf != nil), as well as the garbage
 // collector (callback != nil).  A little clunky to merge these, but avoids
@@ -65,9 +63,7 @@ const sizeofSkipFunction = 256
 //
 // The skip argument is only valid with pcbuf != nil and counts the number
 // of logical frames to skip rather than physical frames (with inlining, a
-// PC in pcbuf can represent multiple calls). If a PC is partially skipped
-// and max > 1, pcbuf[1] will be runtime.skipPleaseUseCallersFrames+N where
-// N indicates the number of logical frames to skip in pcbuf[0].
+// PC in pcbuf can represent multiple calls).
 func gentraceback(pc0, sp0, lr0 uintptr, gp *g, skip int, pcbuf *uintptr, max int, callback func(*stkframe, unsafe.Pointer) bool, v unsafe.Pointer, flags uint) int {
 	if skip > 0 && callback != nil {
 		throw("gentraceback callback cannot be used with non-zero skip")
@@ -219,18 +215,25 @@ func gentraceback(pc0, sp0, lr0 uintptr, gp *g, skip int, pcbuf *uintptr, max in
 			// This function marks the top of the stack. Stop the traceback.
 			frame.lr = 0
 			flr = funcInfo{}
-		} else if flag&funcFlag_SPWRITE != 0 {
+		} else if flag&funcFlag_SPWRITE != 0 && (callback == nil || n > 0) {
 			// The function we are in does a write to SP that we don't know
 			// how to encode in the spdelta table. Examples include context
 			// switch routines like runtime.gogo but also any code that switches
 			// to the g0 stack to run host C code. Since we can't reliably unwind
 			// the SP (we might not even be on the stack we think we are),
 			// we stop the traceback here.
+			// This only applies for profiling signals (callback == nil).
+			//
+			// For a GC stack traversal (callback != nil), we should only see
+			// a function when it has voluntarily preempted itself on entry
+			// during the stack growth check. In that case, the function has
+			// not yet had a chance to do any writes to SP and is safe to unwind.
+			// isAsyncSafePoint does not allow assembly functions to be async preempted,
+			// and preemptPark double-checks that SPWRITE functions are not async preempted.
+			// So for GC stack traversal we leave things alone (this if body does not execute for n == 0)
+			// at the bottom frame of the stack. But farther up the stack we'd better not
+			// find any.
 			if callback != nil {
-				// Finding an SPWRITE should only happen for a profiling signal, which can
-				// arrive at any time. For a GC stack traversal (callback != nil),
-				// we shouldn't see this case, and we must be sure to walk the
-				// entire stack or the GC is invalid. So crash.
 				println("traceback: unexpected SPWRITE function", funcname(f))
 				throw("traceback")
 			}
diff --git a/src/runtime/traceback_test.go b/src/runtime/traceback_test.go
index 2a0497e9a9..83b86a7e90 100644
--- a/src/runtime/traceback_test.go
+++ b/src/runtime/traceback_test.go
@@ -19,8 +19,8 @@ func TestTracebackArgs(t *testing.T) {
 	}{
 		// simple ints
 		{
-			func() int { return testTracebackArgs1(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12) },
-			"testTracebackArgs1(0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, 0x8, 0x9, 0xa, ...)",
+			func() int { return testTracebackArgs1(1, 2, 3, 4, 5) },
+			"testTracebackArgs1(0x1, 0x2, 0x3, 0x4, 0x5)",
 		},
 		// some aggregates
 		{
@@ -53,6 +53,58 @@ func TestTracebackArgs(t *testing.T) {
 			},
 			"testTracebackArgs5(0x0, {0x1, {}, {{}, {}}}, {}, {}, {}, {}, {}, ...)",
 		},
+
+		// edge cases for ...
+		// no ... for 10 args
+		{
+			func() int { return testTracebackArgs6a(1, 2, 3, 4, 5, 6, 7, 8, 9, 10) },
+			"testTracebackArgs6a(0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, 0x8, 0x9, 0xa)",
+		},
+		// has ... for 11 args
+		{
+			func() int { return testTracebackArgs6b(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11) },
+			"testTracebackArgs6b(0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, 0x8, 0x9, 0xa, ...)",
+		},
+		// no ... for aggregates with 10 words
+		{
+			func() int { return testTracebackArgs7a([10]int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}) },
+			"testTracebackArgs7a({0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, 0x8, 0x9, 0xa})",
+		},
+		// has ... for aggregates with 11 words
+		{
+			func() int { return testTracebackArgs7b([11]int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11}) },
+			"testTracebackArgs7b({0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, 0x8, 0x9, 0xa, ...})",
+		},
+		// no ... for aggregates, but with more args
+		{
+			func() int { return testTracebackArgs7c([10]int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}, 11) },
+			"testTracebackArgs7c({0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, 0x8, 0x9, 0xa}, ...)",
+		},
+		// has ... for aggregates and also for more args
+		{
+			func() int { return testTracebackArgs7d([11]int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11}, 12) },
+			"testTracebackArgs7d({0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, 0x8, 0x9, 0xa, ...}, ...)",
+		},
+		// nested aggregates, no ...
+		{
+			func() int { return testTracebackArgs8a(testArgsType8a{1, 2, 3, 4, 5, 6, 7, 8, [2]int{9, 10}}) },
+			"testTracebackArgs8a({0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, 0x8, {0x9, 0xa}})",
+		},
+		// nested aggregates, ... in inner but not outer
+		{
+			func() int { return testTracebackArgs8b(testArgsType8b{1, 2, 3, 4, 5, 6, 7, 8, [3]int{9, 10, 11}}) },
+			"testTracebackArgs8b({0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, 0x8, {0x9, 0xa, ...}})",
+		},
+		// nested aggregates, ... in outer but not inner
+		{
+			func() int { return testTracebackArgs8c(testArgsType8c{1, 2, 3, 4, 5, 6, 7, 8, [2]int{9, 10}, 11}) },
+			"testTracebackArgs8c({0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, 0x8, {0x9, 0xa}, ...})",
+		},
+		// nested aggregates, ... in both inner and outer
+		{
+			func() int { return testTracebackArgs8d(testArgsType8d{1, 2, 3, 4, 5, 6, 7, 8, [3]int{9, 10, 11}, 12}) },
+			"testTracebackArgs8d({0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, 0x8, {0x9, 0xa, ...}, ...})",
+		},
 	}
 	for _, test := range tests {
 		n := test.fn()
@@ -64,11 +116,11 @@ func TestTracebackArgs(t *testing.T) {
 }
 
 //go:noinline
-func testTracebackArgs1(a, b, c, d, e, f, g, h, i, j, k, l int) int {
+func testTracebackArgs1(a, b, c, d, e int) int {
 	n := runtime.Stack(testTracebackArgsBuf[:], false)
 	if a < 0 {
 		// use in-reg args to keep them alive
-		return a + b + c + d + e + f + g + h + i + j + k + l
+		return a + b + c + d + e
 	}
 	return n
 }
@@ -119,3 +171,122 @@ func testTracebackArgs5(a bool, x struct {
 	}
 	return n
 }
+
+//go:noinline
+func testTracebackArgs6a(a, b, c, d, e, f, g, h, i, j int) int {
+	n := runtime.Stack(testTracebackArgsBuf[:], false)
+	if a < 0 {
+		// use in-reg args to keep them alive
+		return a + b + c + d + e + f + g + h + i + j
+	}
+	return n
+}
+
+//go:noinline
+func testTracebackArgs6b(a, b, c, d, e, f, g, h, i, j, k int) int {
+	n := runtime.Stack(testTracebackArgsBuf[:], false)
+	if a < 0 {
+		// use in-reg args to keep them alive
+		return a + b + c + d + e + f + g + h + i + j + k
+	}
+	return n
+}
+
+//go:noinline
+func testTracebackArgs7a(a [10]int) int {
+	n := runtime.Stack(testTracebackArgsBuf[:], false)
+	if a[0] < 0 {
+		// use in-reg args to keep them alive
+		return a[1] + a[2] + a[3] + a[4] + a[5] + a[6] + a[7] + a[8] + a[9]
+	}
+	return n
+}
+
+//go:noinline
+func testTracebackArgs7b(a [11]int) int {
+	n := runtime.Stack(testTracebackArgsBuf[:], false)
+	if a[0] < 0 {
+		// use in-reg args to keep them alive
+		return a[1] + a[2] + a[3] + a[4] + a[5] + a[6] + a[7] + a[8] + a[9] + a[10]
+	}
+	return n
+}
+
+//go:noinline
+func testTracebackArgs7c(a [10]int, b int) int {
+	n := runtime.Stack(testTracebackArgsBuf[:], false)
+	if a[0] < 0 {
+		// use in-reg args to keep them alive
+		return a[1] + a[2] + a[3] + a[4] + a[5] + a[6] + a[7] + a[8] + a[9] + b
+	}
+	return n
+}
+
+//go:noinline
+func testTracebackArgs7d(a [11]int, b int) int {
+	n := runtime.Stack(testTracebackArgsBuf[:], false)
+	if a[0] < 0 {
+		// use in-reg args to keep them alive
+		return a[1] + a[2] + a[3] + a[4] + a[5] + a[6] + a[7] + a[8] + a[9] + a[10] + b
+	}
+	return n
+}
+
+type testArgsType8a struct {
+	a, b, c, d, e, f, g, h int
+	i                      [2]int
+}
+type testArgsType8b struct {
+	a, b, c, d, e, f, g, h int
+	i                      [3]int
+}
+type testArgsType8c struct {
+	a, b, c, d, e, f, g, h int
+	i                      [2]int
+	j                      int
+}
+type testArgsType8d struct {
+	a, b, c, d, e, f, g, h int
+	i                      [3]int
+	j                      int
+}
+
+//go:noinline
+func testTracebackArgs8a(a testArgsType8a) int {
+	n := runtime.Stack(testTracebackArgsBuf[:], false)
+	if a.a < 0 {
+		// use in-reg args to keep them alive
+		return a.b + a.c + a.d + a.e + a.f + a.g + a.h + a.i[0] + a.i[1]
+	}
+	return n
+}
+
+//go:noinline
+func testTracebackArgs8b(a testArgsType8b) int {
+	n := runtime.Stack(testTracebackArgsBuf[:], false)
+	if a.a < 0 {
+		// use in-reg args to keep them alive
+		return a.b + a.c + a.d + a.e + a.f + a.g + a.h + a.i[0] + a.i[1] + a.i[2]
+	}
+	return n
+}
+
+//go:noinline
+func testTracebackArgs8c(a testArgsType8c) int {
+	n := runtime.Stack(testTracebackArgsBuf[:], false)
+	if a.a < 0 {
+		// use in-reg args to keep them alive
+		return a.b + a.c + a.d + a.e + a.f + a.g + a.h + a.i[0] + a.i[1] + a.j
+	}
+	return n
+}
+
+//go:noinline
+func testTracebackArgs8d(a testArgsType8d) int {
+	n := runtime.Stack(testTracebackArgsBuf[:], false)
+	if a.a < 0 {
+		// use in-reg args to keep them alive
+		return a.b + a.c + a.d + a.e + a.f + a.g + a.h + a.i[0] + a.i[1] + a.i[2] + a.j
+	}
+	return n
+}
diff --git a/src/runtime/type.go b/src/runtime/type.go
index c0911b1dcb..4039273695 100644
--- a/src/runtime/type.go
+++ b/src/runtime/type.go
@@ -11,7 +11,7 @@ import "unsafe"
 // tflag is documented in reflect/type.go.
 //
 // tflag values must be kept in sync with copies in:
-//	cmd/compile/internal/gc/reflect.go
+//	cmd/compile/internal/reflectdata/reflect.go
 //	cmd/link/internal/ld/decodesym.go
 //	reflect/type.go
 //      internal/reflectlite/type.go
@@ -25,7 +25,7 @@ const (
 )
 
 // Needs to be in sync with ../cmd/link/internal/ld/decodesym.go:/^func.commonsize,
-// ../cmd/compile/internal/gc/reflect.go:/^func.dcommontype and
+// ../cmd/compile/internal/reflectdata/reflect.go:/^func.dcommontype and
 // ../reflect/type.go:/^type.rtype.
 // ../internal/reflectlite/type.go:/^type.rtype.
 type _type struct {
@@ -383,7 +383,7 @@ type maptype struct {
 }
 
 // Note: flag values must match those used in the TMAP case
-// in ../cmd/compile/internal/gc/reflect.go:writeType.
+// in ../cmd/compile/internal/reflectdata/reflect.go:writeType.
 func (mt *maptype) indirectkey() bool { // store ptr to key instead of key itself
 	return mt.flags&1 != 0
 }
@@ -459,51 +459,52 @@ func (n name) isExported() bool {
 	return (*n.bytes)&(1<<0) != 0
 }
 
-func (n name) nameLen() int {
-	return int(uint16(*n.data(1))<<8 | uint16(*n.data(2)))
-}
-
-func (n name) tagLen() int {
-	if *n.data(0)&(1<<1) == 0 {
-		return 0
+func (n name) readvarint(off int) (int, int) {
+	v := 0
+	for i := 0; ; i++ {
+		x := *n.data(off + i)
+		v += int(x&0x7f) << (7 * i)
+		if x&0x80 == 0 {
+			return i + 1, v
+		}
 	}
-	off := 3 + n.nameLen()
-	return int(uint16(*n.data(off))<<8 | uint16(*n.data(off + 1)))
 }
 
 func (n name) name() (s string) {
 	if n.bytes == nil {
 		return ""
 	}
-	nl := n.nameLen()
-	if nl == 0 {
+	i, l := n.readvarint(1)
+	if l == 0 {
 		return ""
 	}
 	hdr := (*stringStruct)(unsafe.Pointer(&s))
-	hdr.str = unsafe.Pointer(n.data(3))
-	hdr.len = nl
-	return s
+	hdr.str = unsafe.Pointer(n.data(1 + i))
+	hdr.len = l
+	return
 }
 
 func (n name) tag() (s string) {
-	tl := n.tagLen()
-	if tl == 0 {
+	if *n.data(0)&(1<<1) == 0 {
 		return ""
 	}
-	nl := n.nameLen()
+	i, l := n.readvarint(1)
+	i2, l2 := n.readvarint(1 + i + l)
 	hdr := (*stringStruct)(unsafe.Pointer(&s))
-	hdr.str = unsafe.Pointer(n.data(3 + nl + 2))
-	hdr.len = tl
-	return s
+	hdr.str = unsafe.Pointer(n.data(1 + i + l + i2))
+	hdr.len = l2
+	return
 }
 
 func (n name) pkgPath() string {
 	if n.bytes == nil || *n.data(0)&(1<<2) == 0 {
 		return ""
 	}
-	off := 3 + n.nameLen()
-	if tl := n.tagLen(); tl > 0 {
-		off += 2 + tl
+	i, l := n.readvarint(1)
+	off := 1 + i + l
+	if *n.data(0)&(1<<1) != 0 {
+		i2, l2 := n.readvarint(off)
+		off += i2 + l2
 	}
 	var nameOff nameOff
 	copy((*[4]byte)(unsafe.Pointer(&nameOff))[:], (*[4]byte)(unsafe.Pointer(n.data(off)))[:])
@@ -515,10 +516,8 @@ func (n name) isBlank() bool {
 	if n.bytes == nil {
 		return false
 	}
-	if n.nameLen() != 1 {
-		return false
-	}
-	return *n.data(3) == '_'
+	_, l := n.readvarint(1)
+	return l == 1 && *n.data(2) == '_'
 }
 
 // typelinksinit scans the types from extra modules and builds the
diff --git a/src/runtime/wincallback.go b/src/runtime/wincallback.go
index 8411c98412..a7a787d8f6 100644
--- a/src/runtime/wincallback.go
+++ b/src/runtime/wincallback.go
@@ -22,7 +22,9 @@ func genasm386Amd64() {
 
 	buf.WriteString(`// Code generated by wincallback.go using 'go generate'. DO NOT EDIT.
 
+//go:build 386 || amd64
 // +build 386 amd64
+
 // runtime·callbackasm is called by external code to
 // execute Go implemented callback function. It is not
 // called from the start, instead runtime·compilecallback
diff --git a/src/runtime/zcallback_windows.s b/src/runtime/zcallback_windows.s
index 37ffb38aca..e451c2b9d0 100644
--- a/src/runtime/zcallback_windows.s
+++ b/src/runtime/zcallback_windows.s
@@ -1,6 +1,8 @@
 // Code generated by wincallback.go using 'go generate'. DO NOT EDIT.
 
+//go:build 386 || amd64
 // +build 386 amd64
+
 // runtime·callbackasm is called by external code to
 // execute Go implemented callback function. It is not
 // called from the start, instead runtime·compilecallback
diff --git a/src/strconv/atof.go b/src/strconv/atof.go
index 9010a66ca8..57556c7047 100644
--- a/src/strconv/atof.go
+++ b/src/strconv/atof.go
@@ -689,7 +689,7 @@ func atof64(s string) (f float64, n int, err error) {
 // as their respective special floating point values. It ignores case when matching.
 func ParseFloat(s string, bitSize int) (float64, error) {
 	f, n, err := parseFloatPrefix(s, bitSize)
-	if err == nil && n != len(s) {
+	if n != len(s) && (err == nil || err.(*NumError).Err != ErrSyntax) {
 		return 0, syntaxError(fnParseFloat, s)
 	}
 	return f, err
diff --git a/src/strconv/atof_test.go b/src/strconv/atof_test.go
index 3c058b9be5..aa587a473c 100644
--- a/src/strconv/atof_test.go
+++ b/src/strconv/atof_test.go
@@ -342,6 +342,9 @@ var atoftests = []atofTest{
 	{"0x12.345p-_12", "0", ErrSyntax},
 	{"0x12.345p+1__2", "0", ErrSyntax},
 	{"0x12.345p+12_", "0", ErrSyntax},
+
+	{"1e100x", "0", ErrSyntax},
+	{"1e1000x", "0", ErrSyntax},
 }
 
 var atof32tests = []atofTest{
diff --git a/src/strconv/atoi.go b/src/strconv/atoi.go
index c9ba0383b3..631b487d97 100644
--- a/src/strconv/atoi.go
+++ b/src/strconv/atoi.go
@@ -57,6 +57,8 @@ const IntSize = intSize
 const maxUint64 = 1<<64 - 1
 
 // ParseUint is like ParseInt but for unsigned numbers.
+//
+// A sign prefix is not permitted.
 func ParseUint(s string, base int, bitSize int) (uint64, error) {
 	const fnParseUint = "ParseUint"
 
@@ -159,10 +161,13 @@ func ParseUint(s string, base int, bitSize int) (uint64, error) {
 // ParseInt interprets a string s in the given base (0, 2 to 36) and
 // bit size (0 to 64) and returns the corresponding value i.
 //
+// The string may begin with a leading sign: "+" or "-".
+//
 // If the base argument is 0, the true base is implied by the string's
-// prefix: 2 for "0b", 8 for "0" or "0o", 16 for "0x", and 10 otherwise.
-// Also, for argument base 0 only, underscore characters are permitted
-// as defined by the Go syntax for integer literals.
+// prefix following the sign (if present): 2 for "0b", 8 for "0" or "0o",
+// 16 for "0x", and 10 otherwise. Also, for argument base 0 only,
+// underscore characters are permitted as defined by the Go syntax for
+// integer literals.
 //
 // The bitSize argument specifies the integer type
 // that the result must fit into. Bit sizes 0, 8, 16, 32, and 64
diff --git a/src/strconv/atoi_test.go b/src/strconv/atoi_test.go
index 178fb01ea7..867fa66a14 100644
--- a/src/strconv/atoi_test.go
+++ b/src/strconv/atoi_test.go
@@ -33,6 +33,9 @@ var parseUint64Tests = []parseUint64Test{
 	{"_12345", 0, ErrSyntax},
 	{"1__2345", 0, ErrSyntax},
 	{"12345_", 0, ErrSyntax},
+	{"-0", 0, ErrSyntax},
+	{"-1", 0, ErrSyntax},
+	{"+1", 0, ErrSyntax},
 }
 
 type parseUint64BaseTest struct {
@@ -140,8 +143,10 @@ var parseInt64Tests = []parseInt64Test{
 	{"", 0, ErrSyntax},
 	{"0", 0, nil},
 	{"-0", 0, nil},
+	{"+0", 0, nil},
 	{"1", 1, nil},
 	{"-1", -1, nil},
+	{"+1", 1, nil},
 	{"12345", 12345, nil},
 	{"-12345", -12345, nil},
 	{"012345", 12345, nil},
@@ -236,6 +241,11 @@ var parseInt64BaseTests = []parseInt64BaseTest{
 	{"0__12345", 0, 0, ErrSyntax},
 	{"01234__5", 0, 0, ErrSyntax},
 	{"012345_", 0, 0, ErrSyntax},
+
+	{"+0xf", 0, 0xf, nil},
+	{"-0xf", 0, -0xf, nil},
+	{"0x+f", 0, 0, ErrSyntax},
+	{"0x-f", 0, 0, ErrSyntax},
 }
 
 type parseUint32Test struct {
diff --git a/src/sync/atomic/asm.s b/src/sync/atomic/asm.s
index f86726f3a1..7b8c9b9430 100644
--- a/src/sync/atomic/asm.s
+++ b/src/sync/atomic/asm.s
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build !race
 // +build !race
 
 #include "textflag.h"
diff --git a/src/sync/atomic/race.s b/src/sync/atomic/race.s
index fd6ca22700..0866487cc7 100644
--- a/src/sync/atomic/race.s
+++ b/src/sync/atomic/race.s
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build race
 // +build race
 
 // This file is here only to allow external functions.
diff --git a/src/syscall/asm_openbsd_arm.s b/src/syscall/asm_openbsd_arm.s
index 26fd791fda..520da91bf3 100644
--- a/src/syscall/asm_openbsd_arm.s
+++ b/src/syscall/asm_openbsd_arm.s
@@ -3,137 +3,30 @@
 // license that can be found in the LICENSE file.
 
 #include "textflag.h"
-#include "funcdata.h"
 
 //
 // System call support for ARM, OpenBSD
 //
 
-// func Syscall(trap int32, a1, a2, a3 int32) (r1, r2, err int32);
-// func Syscall6(trap int32, a1, a2, a3, a4, a5, a6 int32) (r1, r2, err int32);
-// func Syscall9(trap int32, a1, a2, a3, a4, a5, a6, a7, a8, a9 int64) (r1, r2, err int32)
-// func RawSyscall(trap int32, a1, a2, a3 int32) (r1, r2, err int32);
-// func RawSyscall6(trap int32, a1, a2, a3, a4, a5, a6 int32) (r1, r2, err int32);
-
-// See comment in runtime/sys_openbsd_arm.s re this construction.
-#define NOOP	MOVW    R0, R0
-#define	INVOKE_SYSCALL	\
-	SWI	$0;	\
-	NOOP;		\
-	NOOP
+// Provide these function names via assembly so they are provided as ABI0,
+// rather than ABIInternal.
 
+// func Syscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno)
 TEXT	·Syscall(SB),NOSPLIT,$0-28
-	BL runtime·entersyscall(SB)
-	MOVW trap+0(FP), R12		// syscall number
-	MOVW a1+4(FP), R0		// arg 1
-	MOVW a2+8(FP), R1		// arg 2
-	MOVW a3+12(FP), R2		// arg 3
-	INVOKE_SYSCALL
-	MOVW $0, R2
-	BCS error
-	MOVW R0, r1+16(FP)		// ret 1
-	MOVW R1, r2+20(FP)		// ret 2
-	MOVW R2, err+24(FP)		// err
-	BL runtime·exitsyscall(SB)
-	RET
-error:
-	MOVW $-1, R3
-	MOVW R3, r1+16(FP)		// ret 1
-	MOVW R2, r2+20(FP)		// ret 2
-	MOVW R0, err+24(FP)		// err
-	BL runtime·exitsyscall(SB)
-	RET
+	JMP	·syscallInternal(SB)
 
+// func Syscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err Errno)
 TEXT	·Syscall6(SB),NOSPLIT,$0-40
-	BL runtime·entersyscall(SB)
-	MOVW trap+0(FP), R12		// syscall number
-	MOVW a1+4(FP), R0		// arg 1
-	MOVW a2+8(FP), R1		// arg 2
-	MOVW a3+12(FP), R2		// arg 3
-	MOVW a4+16(FP), R3		// arg 4
-	MOVW R13, R4
-	MOVW $a5+20(FP), R13		// arg 5 to arg 6 are passed on stack
-	INVOKE_SYSCALL
-	MOVW R4, R13
-	MOVW $0, R2
-	BCS error6
-	MOVW R0, r1+28(FP)		// ret 1
-	MOVW R1, r2+32(FP)		// ret 2
-	MOVW R2, err+36(FP)		// err
-	BL runtime·exitsyscall(SB)
-	RET
-error6:
-	MOVW $-1, R3
-	MOVW R3, r1+28(FP)		// ret 1
-	MOVW R2, r2+32(FP)		// ret 2
-	MOVW R0, err+36(FP)		// err
-	BL runtime·exitsyscall(SB)
-	RET
-
-TEXT	·Syscall9(SB),NOSPLIT,$0-52
-	BL runtime·entersyscall(SB)
-	MOVW num+0(FP), R12		// syscall number
-	MOVW a1+4(FP), R0		// arg 1
-	MOVW a2+8(FP), R1		// arg 2
-	MOVW a3+12(FP), R2		// arg 3
-	MOVW a4+16(FP), R3		// arg 4
-	MOVW R13, R4
-	MOVW $a5+20(FP), R13		// arg 5 to arg 9 are passed on stack
-	INVOKE_SYSCALL
-	MOVW R4, R13
-	MOVW $0, R2
-	BCS error9
-	MOVW R0, r1+40(FP)		// ret 1
-	MOVW R1, r2+44(FP)		// ret 2
-	MOVW R2, err+48(FP)		// err
-	BL runtime·exitsyscall(SB)
-	RET
-error9:
-	MOVW $-1, R3
-	MOVW R3, r1+40(FP)		// ret 1
-	MOVW R2, r2+44(FP)		// ret 2
-	MOVW R0, err+48(FP)		// err
-	BL runtime·exitsyscall(SB)
-	RET
+	JMP	·syscall6Internal(SB)
 
+// func RawSyscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno)
 TEXT	·RawSyscall(SB),NOSPLIT,$0-28
-	MOVW trap+0(FP), R12		// syscall number
-	MOVW a1+4(FP), R0		// arg 1
-	MOVW a2+8(FP), R1		// arg 2
-	MOVW a3+12(FP), R2		// arg 3
-	INVOKE_SYSCALL
-	MOVW $0, R2
-	BCS errorr
-	MOVW R0, r1+16(FP)		// ret 1
-	MOVW R1, r2+20(FP)		// ret 2
-	MOVW R2, err+24(FP)		// err
-	RET
-errorr:
-	MOVW $-1, R3
-	MOVW R3, r1+16(FP)		// ret 1
-	MOVW R2, r2+20(FP)		// ret 2
-	MOVW R0, err+24(FP)		// err
-	RET
+	JMP	·rawSyscallInternal(SB)
 
+// func RawSyscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err Errno)
 TEXT	·RawSyscall6(SB),NOSPLIT,$0-40
-	MOVW trap+0(FP), R12		// syscall number
-	MOVW a1+4(FP), R0		// arg 1
-	MOVW a2+8(FP), R1		// arg 2
-	MOVW a3+12(FP), R2		// arg 3
-	MOVW a4+16(FP), R3		// arg 4
-	MOVW R13, R4
-	MOVW $a5+20(FP), R13		// arg 5 to arg 6 are passed on stack
-	INVOKE_SYSCALL
-	MOVW R4, R13
-	MOVW $0, R2
-	BCS errorr6
-	MOVW R0, r1+28(FP)		// ret 1
-	MOVW R1, r2+32(FP)		// ret 2
-	MOVW R2, err+36(FP)		// err
-	RET
-errorr6:
-	MOVW $-1, R3
-	MOVW R3, r1+28(FP)		// ret 1
-	MOVW R2, r2+32(FP)		// ret 2
-	MOVW R0, err+36(FP)		// err
-	RET
+	JMP	·rawSyscall6Internal(SB)
+
+// func Syscall9(trap, a1, a2, a3, a4, a5, a6, a7, a8, a9 uintptr) (r1, r2 uintptr, err Errno)
+TEXT	·Syscall9(SB),NOSPLIT,$0-52
+	JMP	·syscall9Internal(SB)
diff --git a/src/syscall/exec_bsd.go b/src/syscall/exec_bsd.go
index 41d1f693b2..709066e809 100644
--- a/src/syscall/exec_bsd.go
+++ b/src/syscall/exec_bsd.go
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-//go:build dragonfly || freebsd || netbsd || (openbsd && !386 && !amd64 && !arm64)
-// +build dragonfly freebsd netbsd openbsd,!386,!amd64,!arm64
+//go:build dragonfly || freebsd || netbsd || (openbsd && mips64)
+// +build dragonfly freebsd netbsd openbsd,mips64
 
 package syscall
 
diff --git a/src/syscall/exec_libc2.go b/src/syscall/exec_libc2.go
index 8e957b3d4a..b999754c2e 100644
--- a/src/syscall/exec_libc2.go
+++ b/src/syscall/exec_libc2.go
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-//go:build darwin || (openbsd && 386) || (openbsd && amd64) || (openbsd && arm64)
-// +build darwin openbsd,386 openbsd,amd64 openbsd,arm64
+//go:build darwin || (openbsd && !mips64)
+// +build darwin openbsd,!mips64
 
 package syscall
 
diff --git a/src/syscall/exec_linux_test.go b/src/syscall/exec_linux_test.go
index 7d89eaae63..85b59ad00d 100644
--- a/src/syscall/exec_linux_test.go
+++ b/src/syscall/exec_linux_test.go
@@ -318,6 +318,7 @@ func TestGroupCleanupUserNamespace(t *testing.T) {
 		"uid=0(root) gid=0(root) groups=0(root),65534",
 		"uid=0(root) gid=0(root) groups=0(root),65534(nobody),65534(nobody),65534(nobody),65534(nobody),65534(nobody),65534(nobody),65534(nobody),65534(nobody),65534(nobody),65534(nobody)", // Alpine; see https://golang.org/issue/19938
 		"uid=0(root) gid=0(root) groups=0(root) context=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023",                                                                               // CentOS with SELinux context, see https://golang.org/issue/34547
+		"uid=0(root) gid=0(root) groups=0(root),65534(nobody) context=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023",                                                                 // Fedora with SElinux context, see https://golang.org/issue/46752
 	}
 	for _, e := range expected {
 		if strOut == e {
diff --git a/src/syscall/exec_unix.go b/src/syscall/exec_unix.go
index 206a1e17d6..54b18dccd7 100644
--- a/src/syscall/exec_unix.go
+++ b/src/syscall/exec_unix.go
@@ -301,7 +301,7 @@ func Exec(argv0 string, argv []string, envv []string) (err error) {
 	} else if runtime.GOOS == "darwin" || runtime.GOOS == "ios" {
 		// Similarly on Darwin.
 		err1 = execveDarwin(argv0p, &argvp[0], &envvp[0])
-	} else if runtime.GOOS == "openbsd" && (runtime.GOARCH == "386" || runtime.GOARCH == "amd64" || runtime.GOARCH == "arm64") {
+	} else if runtime.GOOS == "openbsd" && (runtime.GOARCH == "386" || runtime.GOARCH == "amd64" || runtime.GOARCH == "arm" || runtime.GOARCH == "arm64") {
 		// Similarly on OpenBSD.
 		err1 = execveOpenBSD(argv0p, &argvp[0], &envvp[0])
 	} else {
diff --git a/src/syscall/exec_windows.go b/src/syscall/exec_windows.go
index 253e9e8c1f..18d15028c3 100644
--- a/src/syscall/exec_windows.go
+++ b/src/syscall/exec_windows.go
@@ -313,6 +313,17 @@ func StartProcess(argv0 string, argv []string, attr *ProcAttr) (pid int, handle
 		}
 	}
 
+	var maj, min, build uint32
+	rtlGetNtVersionNumbers(&maj, &min, &build)
+	isWin7 := maj < 6 || (maj == 6 && min <= 1)
+	// NT kernel handles are divisible by 4, with the bottom 3 bits left as
+	// a tag. The fully set tag correlates with the types of handles we're
+	// concerned about here.  Except, the kernel will interpret some
+	// special handle values, like -1, -2, and so forth, so kernelbase.dll
+	// checks to see that those bottom three bits are checked, but that top
+	// bit is not checked.
+	isLegacyWin7ConsoleHandle := func(handle Handle) bool { return isWin7 && handle&0x10000003 == 3 }
+
 	p, _ := GetCurrentProcess()
 	parentProcess := p
 	if sys.ParentProcess != 0 {
@@ -321,7 +332,15 @@ func StartProcess(argv0 string, argv []string, attr *ProcAttr) (pid int, handle
 	fd := make([]Handle, len(attr.Files))
 	for i := range attr.Files {
 		if attr.Files[i] > 0 {
-			err := DuplicateHandle(p, Handle(attr.Files[i]), parentProcess, &fd[i], 0, true, DUPLICATE_SAME_ACCESS)
+			destinationProcessHandle := parentProcess
+
+			// On Windows 7, console handles aren't real handles, and can only be duplicated
+			// into the current process, not a parent one, which amounts to the same thing.
+			if parentProcess != p && isLegacyWin7ConsoleHandle(Handle(attr.Files[i])) {
+				destinationProcessHandle = p
+			}
+
+			err := DuplicateHandle(p, Handle(attr.Files[i]), destinationProcessHandle, &fd[i], 0, true, DUPLICATE_SAME_ACCESS)
 			if err != nil {
 				return 0, 0, err
 			}
@@ -351,19 +370,40 @@ func StartProcess(argv0 string, argv []string, attr *ProcAttr) (pid int, handle
 	si.StdErr = fd[2]
 
 	fd = append(fd, sys.AdditionalInheritedHandles...)
+
+	// On Windows 7, console handles aren't real handles, so don't pass them
+	// through to PROC_THREAD_ATTRIBUTE_HANDLE_LIST.
+	for i := range fd {
+		if isLegacyWin7ConsoleHandle(fd[i]) {
+			fd[i] = 0
+		}
+	}
+
+	// The presence of a NULL handle in the list is enough to cause PROC_THREAD_ATTRIBUTE_HANDLE_LIST
+	// to treat the entire list as empty, so remove NULL handles.
+	j := 0
+	for i := range fd {
+		if fd[i] != 0 {
+			fd[j] = fd[i]
+			j++
+		}
+	}
+	fd = fd[:j]
+
 	// Do not accidentally inherit more than these handles.
-	err = updateProcThreadAttribute(si.ProcThreadAttributeList, 0, _PROC_THREAD_ATTRIBUTE_HANDLE_LIST, unsafe.Pointer(&fd[0]), uintptr(len(fd))*unsafe.Sizeof(fd[0]), nil, nil)
-	if err != nil {
-		return 0, 0, err
+	if len(fd) > 0 {
+		err = updateProcThreadAttribute(si.ProcThreadAttributeList, 0, _PROC_THREAD_ATTRIBUTE_HANDLE_LIST, unsafe.Pointer(&fd[0]), uintptr(len(fd))*unsafe.Sizeof(fd[0]), nil, nil)
+		if err != nil {
+			return 0, 0, err
+		}
 	}
 
 	pi := new(ProcessInformation)
-
 	flags := sys.CreationFlags | CREATE_UNICODE_ENVIRONMENT | _EXTENDED_STARTUPINFO_PRESENT
 	if sys.Token != 0 {
-		err = CreateProcessAsUser(sys.Token, argv0p, argvp, sys.ProcessAttributes, sys.ThreadAttributes, !sys.NoInheritHandles, flags, createEnvBlock(attr.Env), dirp, &si.StartupInfo, pi)
+		err = CreateProcessAsUser(sys.Token, argv0p, argvp, sys.ProcessAttributes, sys.ThreadAttributes, len(fd) > 0 && !sys.NoInheritHandles, flags, createEnvBlock(attr.Env), dirp, &si.StartupInfo, pi)
 	} else {
-		err = CreateProcess(argv0p, argvp, sys.ProcessAttributes, sys.ThreadAttributes, !sys.NoInheritHandles, flags, createEnvBlock(attr.Env), dirp, &si.StartupInfo, pi)
+		err = CreateProcess(argv0p, argvp, sys.ProcessAttributes, sys.ThreadAttributes, len(fd) > 0 && !sys.NoInheritHandles, flags, createEnvBlock(attr.Env), dirp, &si.StartupInfo, pi)
 	}
 	if err != nil {
 		return 0, 0, err
diff --git a/src/syscall/mkall.sh b/src/syscall/mkall.sh
index 7739147310..dffb52864b 100755
--- a/src/syscall/mkall.sh
+++ b/src/syscall/mkall.sh
@@ -303,15 +303,16 @@ openbsd_amd64)
 	mkasm="go run mkasm.go"
 	;;
 openbsd_arm)
-	GOOSARCH_in="syscall_openbsd1.go syscall_openbsd_$GOARCH.go"
+	GOOSARCH_in="syscall_openbsd_libc.go syscall_openbsd_$GOARCH.go"
 	mkerrors="$mkerrors"
-	mksyscall="./mksyscall.pl -l32 -openbsd -arm"
+	mksyscall="./mksyscall.pl -l32 -openbsd -arm -libc"
 	mksysctl="./mksysctl_openbsd.pl"
 	zsysctl="zsysctl_openbsd.go"
 	mksysnum="curl -s 'http://cvsweb.openbsd.org/cgi-bin/cvsweb/~checkout~/src/sys/kern/syscalls.master' | ./mksysnum_openbsd.pl"
 	# Let the type of C char be signed to make the bare syscall
 	# API consistent between platforms.
 	mktypes="GOARCH=$GOARCH go tool cgo -godefs -- -fsigned-char"
+	mkasm="go run mkasm.go"
 	;;
 openbsd_arm64)
 	GOOSARCH_in="syscall_openbsd_libc.go syscall_openbsd_$GOARCH.go"
diff --git a/src/syscall/mksyscall.pl b/src/syscall/mksyscall.pl
index 5ca3b465d8..758948bc53 100755
--- a/src/syscall/mksyscall.pl
+++ b/src/syscall/mksyscall.pl
@@ -191,6 +191,10 @@ while(<>) {
 			if (!$libc) {
 				push @args, "0";
 			}
+			if($libc && $arm && @args % 2) {
+				# arm abi specifies 64 bit argument must be 64 bit aligned.
+				push @args, "0"
+			}
 			if($_32bit eq "big-endian") {
 				push @args, "uintptr($name>>32)", "uintptr($name)";
 			} elsif($_32bit eq "little-endian") {
diff --git a/src/syscall/syscall_linux_test.go b/src/syscall/syscall_linux_test.go
index adeb7c9ebb..442dc9f10e 100644
--- a/src/syscall/syscall_linux_test.go
+++ b/src/syscall/syscall_linux_test.go
@@ -14,6 +14,7 @@ import (
 	"os/signal"
 	"path/filepath"
 	"runtime"
+	"sort"
 	"strconv"
 	"strings"
 	"syscall"
@@ -583,11 +584,23 @@ func compareStatus(filter, expect string) error {
 				// "Pid:\t".
 			}
 			if strings.HasPrefix(line, filter) {
-				if line != expected {
-					return fmt.Errorf("%q got:%q want:%q (bad) [pid=%d file:'%s' %v]\n", tf, line, expected, pid, string(d), expectedProc)
+				if line == expected {
+					foundAThread = true
+					break
 				}
-				foundAThread = true
-				break
+				if filter == "Groups:" && strings.HasPrefix(line, "Groups:\t") {
+					// https://github.com/golang/go/issues/46145
+					// Containers don't reliably output this line in sorted order so manually sort and compare that.
+					a := strings.Split(line[8:], " ")
+					sort.Strings(a)
+					got := strings.Join(a, " ")
+					if got == expected[8:] {
+						foundAThread = true
+						break
+					}
+
+				}
+				return fmt.Errorf("%q got:%q want:%q (bad) [pid=%d file:'%s' %v]\n", tf, line, expected, pid, string(d), expectedProc)
 			}
 		}
 	}
diff --git a/src/syscall/syscall_openbsd1.go b/src/syscall/syscall_openbsd1.go
index c446768aab..15870ce1ee 100644
--- a/src/syscall/syscall_openbsd1.go
+++ b/src/syscall/syscall_openbsd1.go
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-//go:build openbsd && !386 && !amd64 && !arm64
-// +build openbsd,!386,!amd64,!arm64
+//go:build openbsd && mips64
+// +build openbsd,mips64
 
 package syscall
 
diff --git a/src/syscall/syscall_openbsd_libc.go b/src/syscall/syscall_openbsd_libc.go
index 750be6f707..e67ee4e571 100644
--- a/src/syscall/syscall_openbsd_libc.go
+++ b/src/syscall/syscall_openbsd_libc.go
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-//go:build (openbsd && 386) || (openbsd && amd64) || (openbsd && arm64)
-// +build openbsd,386 openbsd,amd64 openbsd,arm64
+//go:build openbsd && !mips64
+// +build openbsd,!mips64
 
 package syscall
 
diff --git a/src/syscall/syscall_windows.go b/src/syscall/syscall_windows.go
index f9f78bd2b3..660179ae9e 100644
--- a/src/syscall/syscall_windows.go
+++ b/src/syscall/syscall_windows.go
@@ -174,6 +174,9 @@ func compileCallback(fn interface{}, cleanstack bool) uintptr
 // NewCallback converts a Go function to a function pointer conforming to the stdcall calling convention.
 // This is useful when interoperating with Windows code requiring callbacks.
 // The argument is expected to be a function with one uintptr-sized result. The function must not have arguments with size larger than the size of uintptr.
+// Only a limited number of callbacks may be created in a single Go process, and any memory allocated
+// for these callbacks is never released.
+// Between NewCallback and NewCallbackCDecl, at least 1024 callbacks can always be created.
 func NewCallback(fn interface{}) uintptr {
 	return compileCallback(fn, true)
 }
@@ -181,6 +184,9 @@ func NewCallback(fn interface{}) uintptr {
 // NewCallbackCDecl converts a Go function to a function pointer conforming to the cdecl calling convention.
 // This is useful when interoperating with Windows code requiring callbacks.
 // The argument is expected to be a function with one uintptr-sized result. The function must not have arguments with size larger than the size of uintptr.
+// Only a limited number of callbacks may be created in a single Go process, and any memory allocated
+// for these callbacks is never released.
+// Between NewCallback and NewCallbackCDecl, at least 1024 callbacks can always be created.
 func NewCallbackCDecl(fn interface{}) uintptr {
 	return compileCallback(fn, false)
 }
@@ -192,6 +198,7 @@ func NewCallbackCDecl(fn interface{}) uintptr {
 //sys	FreeLibrary(handle Handle) (err error)
 //sys	GetProcAddress(module Handle, procname string) (proc uintptr, err error)
 //sys	GetVersion() (ver uint32, err error)
+//sys	rtlGetNtVersionNumbers(majorVersion *uint32, minorVersion *uint32, buildNumber *uint32) = ntdll.RtlGetNtVersionNumbers
 //sys	formatMessage(flags uint32, msgsrc uintptr, msgid uint32, langid uint32, buf []uint16, args *byte) (n uint32, err error) = FormatMessageW
 //sys	ExitProcess(exitcode uint32)
 //sys	CreateFile(name *uint16, access uint32, mode uint32, sa *SecurityAttributes, createmode uint32, attrs uint32, templatefile int32) (handle Handle, err error) [failretval==InvalidHandle] = CreateFileW
@@ -472,7 +479,6 @@ var (
 
 func getStdHandle(h int) (fd Handle) {
 	r, _ := GetStdHandle(h)
-	CloseOnExec(r)
 	return r
 }
 
diff --git a/src/syscall/syscall_windows_test.go b/src/syscall/syscall_windows_test.go
index b8ec6bee39..194c87805c 100644
--- a/src/syscall/syscall_windows_test.go
+++ b/src/syscall/syscall_windows_test.go
@@ -5,8 +5,12 @@
 package syscall_test
 
 import (
+	"fmt"
+	"internal/testenv"
 	"os"
+	"os/exec"
 	"path/filepath"
+	"strings"
 	"syscall"
 	"testing"
 )
@@ -71,3 +75,75 @@ func TestTOKEN_ALL_ACCESS(t *testing.T) {
 		t.Errorf("TOKEN_ALL_ACCESS = %x, want 0xF01FF", syscall.TOKEN_ALL_ACCESS)
 	}
 }
+
+func TestStdioAreInheritable(t *testing.T) {
+	testenv.MustHaveGoBuild(t)
+	testenv.MustHaveCGO(t)
+	testenv.MustHaveExecPath(t, "gcc")
+
+	tmpdir := t.TempDir()
+
+	// build go dll
+	const dlltext = `
+package main
+
+import "C"
+import (
+	"fmt"
+)
+
+//export HelloWorld
+func HelloWorld() {
+	fmt.Println("Hello World")
+}
+
+func main() {}
+`
+	dllsrc := filepath.Join(tmpdir, "helloworld.go")
+	err := os.WriteFile(dllsrc, []byte(dlltext), 0644)
+	if err != nil {
+		t.Fatal(err)
+	}
+	dll := filepath.Join(tmpdir, "helloworld.dll")
+	cmd := exec.Command(testenv.GoToolPath(t), "build", "-o", dll, "-buildmode", "c-shared", dllsrc)
+	out, err := testenv.CleanCmdEnv(cmd).CombinedOutput()
+	if err != nil {
+		t.Fatalf("failed to build go library: %s\n%s", err, out)
+	}
+
+	// build c exe
+	const exetext = `
+#include 
+#include 
+int main(int argc, char *argv[])
+{
+	system("hostname");
+	((void(*)(void))GetProcAddress(LoadLibraryA(%q), "HelloWorld"))();
+	system("hostname");
+	return 0;
+}
+`
+	exe := filepath.Join(tmpdir, "helloworld.exe")
+	cmd = exec.Command("gcc", "-o", exe, "-xc", "-")
+	cmd.Stdin = strings.NewReader(fmt.Sprintf(exetext, dll))
+	out, err = testenv.CleanCmdEnv(cmd).CombinedOutput()
+	if err != nil {
+		t.Fatalf("failed to build c executable: %s\n%s", err, out)
+	}
+	out, err = exec.Command(exe).CombinedOutput()
+	if err != nil {
+		t.Fatalf("c program execution failed: %v: %v", err, string(out))
+	}
+
+	hostname, err := os.Hostname()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	have := strings.ReplaceAll(string(out), "\n", "")
+	have = strings.ReplaceAll(have, "\r", "")
+	want := fmt.Sprintf("%sHello World%s", hostname, hostname)
+	if have != want {
+		t.Fatalf("c program output is wrong: got %q, want %q", have, want)
+	}
+}
diff --git a/src/syscall/zsyscall_openbsd_arm.go b/src/syscall/zsyscall_openbsd_arm.go
index 31425b3558..04a2fadccd 100644
--- a/src/syscall/zsyscall_openbsd_arm.go
+++ b/src/syscall/zsyscall_openbsd_arm.go
@@ -1,4 +1,4 @@
-// mksyscall.pl -l32 -openbsd -arm -tags openbsd,arm syscall_bsd.go syscall_openbsd.go syscall_openbsd_arm.go
+// mksyscall.pl -l32 -openbsd -arm -libc -tags openbsd,arm syscall_bsd.go syscall_openbsd.go syscall_openbsd_libc.go syscall_openbsd_arm.go
 // Code generated by the command above; DO NOT EDIT.
 
 //go:build openbsd && arm
@@ -7,11 +7,12 @@
 package syscall
 
 import "unsafe"
+import "internal/abi"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func getgroups(ngid int, gid *_Gid_t) (n int, err error) {
-	r0, _, e1 := RawSyscall(SYS_GETGROUPS, uintptr(ngid), uintptr(unsafe.Pointer(gid)), 0)
+	r0, _, e1 := rawSyscall(abi.FuncPCABI0(libc_getgroups_trampoline), uintptr(ngid), uintptr(unsafe.Pointer(gid)), 0)
 	n = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -19,20 +20,28 @@ func getgroups(ngid int, gid *_Gid_t) (n int, err error) {
 	return
 }
 
+func libc_getgroups_trampoline()
+
+//go:cgo_import_dynamic libc_getgroups getgroups "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func setgroups(ngid int, gid *_Gid_t) (err error) {
-	_, _, e1 := RawSyscall(SYS_SETGROUPS, uintptr(ngid), uintptr(unsafe.Pointer(gid)), 0)
+	_, _, e1 := rawSyscall(abi.FuncPCABI0(libc_setgroups_trampoline), uintptr(ngid), uintptr(unsafe.Pointer(gid)), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
+func libc_setgroups_trampoline()
+
+//go:cgo_import_dynamic libc_setgroups setgroups "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func wait4(pid int, wstatus *_C_int, options int, rusage *Rusage) (wpid int, err error) {
-	r0, _, e1 := Syscall6(SYS_WAIT4, uintptr(pid), uintptr(unsafe.Pointer(wstatus)), uintptr(options), uintptr(unsafe.Pointer(rusage)), 0, 0)
+	r0, _, e1 := syscall6(abi.FuncPCABI0(libc_wait4_trampoline), uintptr(pid), uintptr(unsafe.Pointer(wstatus)), uintptr(options), uintptr(unsafe.Pointer(rusage)), 0, 0)
 	wpid = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -40,10 +49,14 @@ func wait4(pid int, wstatus *_C_int, options int, rusage *Rusage) (wpid int, err
 	return
 }
 
+func libc_wait4_trampoline()
+
+//go:cgo_import_dynamic libc_wait4 wait4 "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func accept(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (fd int, err error) {
-	r0, _, e1 := Syscall(SYS_ACCEPT, uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)))
+	r0, _, e1 := syscall(abi.FuncPCABI0(libc_accept_trampoline), uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)))
 	fd = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -51,30 +64,42 @@ func accept(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (fd int, err error) {
 	return
 }
 
+func libc_accept_trampoline()
+
+//go:cgo_import_dynamic libc_accept accept "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) {
-	_, _, e1 := Syscall(SYS_BIND, uintptr(s), uintptr(addr), uintptr(addrlen))
+	_, _, e1 := syscall(abi.FuncPCABI0(libc_bind_trampoline), uintptr(s), uintptr(addr), uintptr(addrlen))
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
+func libc_bind_trampoline()
+
+//go:cgo_import_dynamic libc_bind bind "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) {
-	_, _, e1 := Syscall(SYS_CONNECT, uintptr(s), uintptr(addr), uintptr(addrlen))
+	_, _, e1 := syscall(abi.FuncPCABI0(libc_connect_trampoline), uintptr(s), uintptr(addr), uintptr(addrlen))
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
+func libc_connect_trampoline()
+
+//go:cgo_import_dynamic libc_connect connect "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func socket(domain int, typ int, proto int) (fd int, err error) {
-	r0, _, e1 := RawSyscall(SYS_SOCKET, uintptr(domain), uintptr(typ), uintptr(proto))
+	r0, _, e1 := rawSyscall(abi.FuncPCABI0(libc_socket_trampoline), uintptr(domain), uintptr(typ), uintptr(proto))
 	fd = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -82,66 +107,94 @@ func socket(domain int, typ int, proto int) (fd int, err error) {
 	return
 }
 
+func libc_socket_trampoline()
+
+//go:cgo_import_dynamic libc_socket socket "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error) {
-	_, _, e1 := Syscall6(SYS_GETSOCKOPT, uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(unsafe.Pointer(vallen)), 0)
+	_, _, e1 := syscall6(abi.FuncPCABI0(libc_getsockopt_trampoline), uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(unsafe.Pointer(vallen)), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
+func libc_getsockopt_trampoline()
+
+//go:cgo_import_dynamic libc_getsockopt getsockopt "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) (err error) {
-	_, _, e1 := Syscall6(SYS_SETSOCKOPT, uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(vallen), 0)
+	_, _, e1 := syscall6(abi.FuncPCABI0(libc_setsockopt_trampoline), uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(vallen), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
+func libc_setsockopt_trampoline()
+
+//go:cgo_import_dynamic libc_setsockopt setsockopt "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func getpeername(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) {
-	_, _, e1 := RawSyscall(SYS_GETPEERNAME, uintptr(fd), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)))
+	_, _, e1 := rawSyscall(abi.FuncPCABI0(libc_getpeername_trampoline), uintptr(fd), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)))
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
+func libc_getpeername_trampoline()
+
+//go:cgo_import_dynamic libc_getpeername getpeername "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func getsockname(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) {
-	_, _, e1 := RawSyscall(SYS_GETSOCKNAME, uintptr(fd), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)))
+	_, _, e1 := rawSyscall(abi.FuncPCABI0(libc_getsockname_trampoline), uintptr(fd), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)))
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
+func libc_getsockname_trampoline()
+
+//go:cgo_import_dynamic libc_getsockname getsockname "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Shutdown(s int, how int) (err error) {
-	_, _, e1 := Syscall(SYS_SHUTDOWN, uintptr(s), uintptr(how), 0)
+	_, _, e1 := syscall(abi.FuncPCABI0(libc_shutdown_trampoline), uintptr(s), uintptr(how), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
+func libc_shutdown_trampoline()
+
+//go:cgo_import_dynamic libc_shutdown shutdown "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func socketpair(domain int, typ int, proto int, fd *[2]int32) (err error) {
-	_, _, e1 := RawSyscall6(SYS_SOCKETPAIR, uintptr(domain), uintptr(typ), uintptr(proto), uintptr(unsafe.Pointer(fd)), 0, 0)
+	_, _, e1 := rawSyscall6(abi.FuncPCABI0(libc_socketpair_trampoline), uintptr(domain), uintptr(typ), uintptr(proto), uintptr(unsafe.Pointer(fd)), 0, 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
+func libc_socketpair_trampoline()
+
+//go:cgo_import_dynamic libc_socketpair socketpair "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func recvfrom(fd int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (n int, err error) {
@@ -151,7 +204,7 @@ func recvfrom(fd int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Sockl
 	} else {
 		_p0 = unsafe.Pointer(&_zero)
 	}
-	r0, _, e1 := Syscall6(SYS_RECVFROM, uintptr(fd), uintptr(_p0), uintptr(len(p)), uintptr(flags), uintptr(unsafe.Pointer(from)), uintptr(unsafe.Pointer(fromlen)))
+	r0, _, e1 := syscall6(abi.FuncPCABI0(libc_recvfrom_trampoline), uintptr(fd), uintptr(_p0), uintptr(len(p)), uintptr(flags), uintptr(unsafe.Pointer(from)), uintptr(unsafe.Pointer(fromlen)))
 	n = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -159,6 +212,10 @@ func recvfrom(fd int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Sockl
 	return
 }
 
+func libc_recvfrom_trampoline()
+
+//go:cgo_import_dynamic libc_recvfrom recvfrom "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func sendto(s int, buf []byte, flags int, to unsafe.Pointer, addrlen _Socklen) (err error) {
@@ -168,17 +225,21 @@ func sendto(s int, buf []byte, flags int, to unsafe.Pointer, addrlen _Socklen) (
 	} else {
 		_p0 = unsafe.Pointer(&_zero)
 	}
-	_, _, e1 := Syscall6(SYS_SENDTO, uintptr(s), uintptr(_p0), uintptr(len(buf)), uintptr(flags), uintptr(to), uintptr(addrlen))
+	_, _, e1 := syscall6(abi.FuncPCABI0(libc_sendto_trampoline), uintptr(s), uintptr(_p0), uintptr(len(buf)), uintptr(flags), uintptr(to), uintptr(addrlen))
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
+func libc_sendto_trampoline()
+
+//go:cgo_import_dynamic libc_sendto sendto "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func recvmsg(s int, msg *Msghdr, flags int) (n int, err error) {
-	r0, _, e1 := Syscall(SYS_RECVMSG, uintptr(s), uintptr(unsafe.Pointer(msg)), uintptr(flags))
+	r0, _, e1 := syscall(abi.FuncPCABI0(libc_recvmsg_trampoline), uintptr(s), uintptr(unsafe.Pointer(msg)), uintptr(flags))
 	n = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -186,10 +247,14 @@ func recvmsg(s int, msg *Msghdr, flags int) (n int, err error) {
 	return
 }
 
+func libc_recvmsg_trampoline()
+
+//go:cgo_import_dynamic libc_recvmsg recvmsg "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func sendmsg(s int, msg *Msghdr, flags int) (n int, err error) {
-	r0, _, e1 := Syscall(SYS_SENDMSG, uintptr(s), uintptr(unsafe.Pointer(msg)), uintptr(flags))
+	r0, _, e1 := syscall(abi.FuncPCABI0(libc_sendmsg_trampoline), uintptr(s), uintptr(unsafe.Pointer(msg)), uintptr(flags))
 	n = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -197,10 +262,14 @@ func sendmsg(s int, msg *Msghdr, flags int) (n int, err error) {
 	return
 }
 
+func libc_sendmsg_trampoline()
+
+//go:cgo_import_dynamic libc_sendmsg sendmsg "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func kevent(kq int, change unsafe.Pointer, nchange int, event unsafe.Pointer, nevent int, timeout *Timespec) (n int, err error) {
-	r0, _, e1 := Syscall6(SYS_KEVENT, uintptr(kq), uintptr(change), uintptr(nchange), uintptr(event), uintptr(nevent), uintptr(unsafe.Pointer(timeout)))
+	r0, _, e1 := syscall6(abi.FuncPCABI0(libc_kevent_trampoline), uintptr(kq), uintptr(change), uintptr(nchange), uintptr(event), uintptr(nevent), uintptr(unsafe.Pointer(timeout)))
 	n = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -208,21 +277,9 @@ func kevent(kq int, change unsafe.Pointer, nchange int, event unsafe.Pointer, ne
 	return
 }
 
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+func libc_kevent_trampoline()
 
-func sysctl(mib []_C_int, old *byte, oldlen *uintptr, new *byte, newlen uintptr) (err error) {
-	var _p0 unsafe.Pointer
-	if len(mib) > 0 {
-		_p0 = unsafe.Pointer(&mib[0])
-	} else {
-		_p0 = unsafe.Pointer(&_zero)
-	}
-	_, _, e1 := Syscall6(SYS___SYSCTL, uintptr(_p0), uintptr(len(mib)), uintptr(unsafe.Pointer(old)), uintptr(unsafe.Pointer(oldlen)), uintptr(unsafe.Pointer(new)), uintptr(newlen))
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
+//go:cgo_import_dynamic libc_kevent kevent "libc.so"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
@@ -232,27 +289,35 @@ func utimes(path string, timeval *[2]Timeval) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := Syscall(SYS_UTIMES, uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(timeval)), 0)
+	_, _, e1 := syscall(abi.FuncPCABI0(libc_utimes_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(timeval)), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
+func libc_utimes_trampoline()
+
+//go:cgo_import_dynamic libc_utimes utimes "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func futimes(fd int, timeval *[2]Timeval) (err error) {
-	_, _, e1 := Syscall(SYS_FUTIMES, uintptr(fd), uintptr(unsafe.Pointer(timeval)), 0)
+	_, _, e1 := syscall(abi.FuncPCABI0(libc_futimes_trampoline), uintptr(fd), uintptr(unsafe.Pointer(timeval)), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
+func libc_futimes_trampoline()
+
+//go:cgo_import_dynamic libc_futimes futimes "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func fcntl(fd int, cmd int, arg int) (val int, err error) {
-	r0, _, e1 := Syscall(SYS_FCNTL, uintptr(fd), uintptr(cmd), uintptr(arg))
+	r0, _, e1 := syscall(abi.FuncPCABI0(libc_fcntl_trampoline), uintptr(fd), uintptr(cmd), uintptr(arg))
 	val = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -260,20 +325,28 @@ func fcntl(fd int, cmd int, arg int) (val int, err error) {
 	return
 }
 
+func libc_fcntl_trampoline()
+
+//go:cgo_import_dynamic libc_fcntl fcntl "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func pipe2(p *[2]_C_int, flags int) (err error) {
-	_, _, e1 := RawSyscall(SYS_PIPE2, uintptr(unsafe.Pointer(p)), uintptr(flags), 0)
+	_, _, e1 := rawSyscall(abi.FuncPCABI0(libc_pipe2_trampoline), uintptr(unsafe.Pointer(p)), uintptr(flags), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
+func libc_pipe2_trampoline()
+
+//go:cgo_import_dynamic libc_pipe2 pipe2 "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func accept4(fd int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (nfd int, err error) {
-	r0, _, e1 := Syscall6(SYS_ACCEPT4, uintptr(fd), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)), uintptr(flags), 0, 0)
+	r0, _, e1 := syscall6(abi.FuncPCABI0(libc_accept4_trampoline), uintptr(fd), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)), uintptr(flags), 0, 0)
 	nfd = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -281,6 +354,10 @@ func accept4(fd int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (nfd int
 	return
 }
 
+func libc_accept4_trampoline()
+
+//go:cgo_import_dynamic libc_accept4 accept4 "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func getdents(fd int, buf []byte) (n int, err error) {
@@ -290,7 +367,7 @@ func getdents(fd int, buf []byte) (n int, err error) {
 	} else {
 		_p0 = unsafe.Pointer(&_zero)
 	}
-	r0, _, e1 := Syscall(SYS_GETDENTS, uintptr(fd), uintptr(_p0), uintptr(len(buf)))
+	r0, _, e1 := syscall(abi.FuncPCABI0(libc_getdents_trampoline), uintptr(fd), uintptr(_p0), uintptr(len(buf)))
 	n = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -298,6 +375,10 @@ func getdents(fd int, buf []byte) (n int, err error) {
 	return
 }
 
+func libc_getdents_trampoline()
+
+//go:cgo_import_dynamic libc_getdents getdents "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Access(path string, mode uint32) (err error) {
@@ -306,23 +387,31 @@ func Access(path string, mode uint32) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := Syscall(SYS_ACCESS, uintptr(unsafe.Pointer(_p0)), uintptr(mode), 0)
+	_, _, e1 := syscall(abi.FuncPCABI0(libc_access_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(mode), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
+func libc_access_trampoline()
+
+//go:cgo_import_dynamic libc_access access "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Adjtime(delta *Timeval, olddelta *Timeval) (err error) {
-	_, _, e1 := Syscall(SYS_ADJTIME, uintptr(unsafe.Pointer(delta)), uintptr(unsafe.Pointer(olddelta)), 0)
+	_, _, e1 := syscall(abi.FuncPCABI0(libc_adjtime_trampoline), uintptr(unsafe.Pointer(delta)), uintptr(unsafe.Pointer(olddelta)), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
+func libc_adjtime_trampoline()
+
+//go:cgo_import_dynamic libc_adjtime adjtime "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Chdir(path string) (err error) {
@@ -331,13 +420,17 @@ func Chdir(path string) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := Syscall(SYS_CHDIR, uintptr(unsafe.Pointer(_p0)), 0, 0)
+	_, _, e1 := syscall(abi.FuncPCABI0(libc_chdir_trampoline), uintptr(unsafe.Pointer(_p0)), 0, 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
+func libc_chdir_trampoline()
+
+//go:cgo_import_dynamic libc_chdir chdir "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Chflags(path string, flags int) (err error) {
@@ -346,13 +439,17 @@ func Chflags(path string, flags int) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := Syscall(SYS_CHFLAGS, uintptr(unsafe.Pointer(_p0)), uintptr(flags), 0)
+	_, _, e1 := syscall(abi.FuncPCABI0(libc_chflags_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(flags), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
+func libc_chflags_trampoline()
+
+//go:cgo_import_dynamic libc_chflags chflags "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Chmod(path string, mode uint32) (err error) {
@@ -361,13 +458,17 @@ func Chmod(path string, mode uint32) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := Syscall(SYS_CHMOD, uintptr(unsafe.Pointer(_p0)), uintptr(mode), 0)
+	_, _, e1 := syscall(abi.FuncPCABI0(libc_chmod_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(mode), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
+func libc_chmod_trampoline()
+
+//go:cgo_import_dynamic libc_chmod chmod "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Chown(path string, uid int, gid int) (err error) {
@@ -376,13 +477,17 @@ func Chown(path string, uid int, gid int) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := Syscall(SYS_CHOWN, uintptr(unsafe.Pointer(_p0)), uintptr(uid), uintptr(gid))
+	_, _, e1 := syscall(abi.FuncPCABI0(libc_chown_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(uid), uintptr(gid))
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
+func libc_chown_trampoline()
+
+//go:cgo_import_dynamic libc_chown chown "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Chroot(path string) (err error) {
@@ -391,27 +496,35 @@ func Chroot(path string) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := Syscall(SYS_CHROOT, uintptr(unsafe.Pointer(_p0)), 0, 0)
+	_, _, e1 := syscall(abi.FuncPCABI0(libc_chroot_trampoline), uintptr(unsafe.Pointer(_p0)), 0, 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
+func libc_chroot_trampoline()
+
+//go:cgo_import_dynamic libc_chroot chroot "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Close(fd int) (err error) {
-	_, _, e1 := Syscall(SYS_CLOSE, uintptr(fd), 0, 0)
+	_, _, e1 := syscall(abi.FuncPCABI0(libc_close_trampoline), uintptr(fd), 0, 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
+func libc_close_trampoline()
+
+//go:cgo_import_dynamic libc_close close "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Dup(fd int) (nfd int, err error) {
-	r0, _, e1 := Syscall(SYS_DUP, uintptr(fd), 0, 0)
+	r0, _, e1 := syscall(abi.FuncPCABI0(libc_dup_trampoline), uintptr(fd), 0, 0)
 	nfd = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -419,70 +532,98 @@ func Dup(fd int) (nfd int, err error) {
 	return
 }
 
+func libc_dup_trampoline()
+
+//go:cgo_import_dynamic libc_dup dup "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Dup2(from int, to int) (err error) {
-	_, _, e1 := Syscall(SYS_DUP2, uintptr(from), uintptr(to), 0)
+	_, _, e1 := syscall(abi.FuncPCABI0(libc_dup2_trampoline), uintptr(from), uintptr(to), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
+func libc_dup2_trampoline()
+
+//go:cgo_import_dynamic libc_dup2 dup2 "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Fchdir(fd int) (err error) {
-	_, _, e1 := Syscall(SYS_FCHDIR, uintptr(fd), 0, 0)
+	_, _, e1 := syscall(abi.FuncPCABI0(libc_fchdir_trampoline), uintptr(fd), 0, 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
+func libc_fchdir_trampoline()
+
+//go:cgo_import_dynamic libc_fchdir fchdir "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Fchflags(fd int, flags int) (err error) {
-	_, _, e1 := Syscall(SYS_FCHFLAGS, uintptr(fd), uintptr(flags), 0)
+	_, _, e1 := syscall(abi.FuncPCABI0(libc_fchflags_trampoline), uintptr(fd), uintptr(flags), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
+func libc_fchflags_trampoline()
+
+//go:cgo_import_dynamic libc_fchflags fchflags "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Fchmod(fd int, mode uint32) (err error) {
-	_, _, e1 := Syscall(SYS_FCHMOD, uintptr(fd), uintptr(mode), 0)
+	_, _, e1 := syscall(abi.FuncPCABI0(libc_fchmod_trampoline), uintptr(fd), uintptr(mode), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
+func libc_fchmod_trampoline()
+
+//go:cgo_import_dynamic libc_fchmod fchmod "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Fchown(fd int, uid int, gid int) (err error) {
-	_, _, e1 := Syscall(SYS_FCHOWN, uintptr(fd), uintptr(uid), uintptr(gid))
+	_, _, e1 := syscall(abi.FuncPCABI0(libc_fchown_trampoline), uintptr(fd), uintptr(uid), uintptr(gid))
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
+func libc_fchown_trampoline()
+
+//go:cgo_import_dynamic libc_fchown fchown "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Flock(fd int, how int) (err error) {
-	_, _, e1 := Syscall(SYS_FLOCK, uintptr(fd), uintptr(how), 0)
+	_, _, e1 := syscall(abi.FuncPCABI0(libc_flock_trampoline), uintptr(fd), uintptr(how), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
+func libc_flock_trampoline()
+
+//go:cgo_import_dynamic libc_flock flock "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Fpathconf(fd int, name int) (val int, err error) {
-	r0, _, e1 := Syscall(SYS_FPATHCONF, uintptr(fd), uintptr(name), 0)
+	r0, _, e1 := syscall(abi.FuncPCABI0(libc_fpathconf_trampoline), uintptr(fd), uintptr(name), 0)
 	val = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -490,74 +631,106 @@ func Fpathconf(fd int, name int) (val int, err error) {
 	return
 }
 
+func libc_fpathconf_trampoline()
+
+//go:cgo_import_dynamic libc_fpathconf fpathconf "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Fstat(fd int, stat *Stat_t) (err error) {
-	_, _, e1 := Syscall(SYS_FSTAT, uintptr(fd), uintptr(unsafe.Pointer(stat)), 0)
+	_, _, e1 := syscall(abi.FuncPCABI0(libc_fstat_trampoline), uintptr(fd), uintptr(unsafe.Pointer(stat)), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
+func libc_fstat_trampoline()
+
+//go:cgo_import_dynamic libc_fstat fstat "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Fstatfs(fd int, stat *Statfs_t) (err error) {
-	_, _, e1 := Syscall(SYS_FSTATFS, uintptr(fd), uintptr(unsafe.Pointer(stat)), 0)
+	_, _, e1 := syscall(abi.FuncPCABI0(libc_fstatfs_trampoline), uintptr(fd), uintptr(unsafe.Pointer(stat)), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
+func libc_fstatfs_trampoline()
+
+//go:cgo_import_dynamic libc_fstatfs fstatfs "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Fsync(fd int) (err error) {
-	_, _, e1 := Syscall(SYS_FSYNC, uintptr(fd), 0, 0)
+	_, _, e1 := syscall(abi.FuncPCABI0(libc_fsync_trampoline), uintptr(fd), 0, 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
+func libc_fsync_trampoline()
+
+//go:cgo_import_dynamic libc_fsync fsync "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Ftruncate(fd int, length int64) (err error) {
-	_, _, e1 := Syscall6(SYS_FTRUNCATE, uintptr(fd), 0, uintptr(length), uintptr(length>>32), 0, 0)
+	_, _, e1 := syscall6(abi.FuncPCABI0(libc_ftruncate_trampoline), uintptr(fd), 0, uintptr(length), uintptr(length>>32), 0, 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
+func libc_ftruncate_trampoline()
+
+//go:cgo_import_dynamic libc_ftruncate ftruncate "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Getegid() (egid int) {
-	r0, _, _ := RawSyscall(SYS_GETEGID, 0, 0, 0)
+	r0, _, _ := rawSyscall(abi.FuncPCABI0(libc_getegid_trampoline), 0, 0, 0)
 	egid = int(r0)
 	return
 }
 
+func libc_getegid_trampoline()
+
+//go:cgo_import_dynamic libc_getegid getegid "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Geteuid() (uid int) {
-	r0, _, _ := RawSyscall(SYS_GETEUID, 0, 0, 0)
+	r0, _, _ := rawSyscall(abi.FuncPCABI0(libc_geteuid_trampoline), 0, 0, 0)
 	uid = int(r0)
 	return
 }
 
+func libc_geteuid_trampoline()
+
+//go:cgo_import_dynamic libc_geteuid geteuid "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Getgid() (gid int) {
-	r0, _, _ := RawSyscall(SYS_GETGID, 0, 0, 0)
+	r0, _, _ := rawSyscall(abi.FuncPCABI0(libc_getgid_trampoline), 0, 0, 0)
 	gid = int(r0)
 	return
 }
 
+func libc_getgid_trampoline()
+
+//go:cgo_import_dynamic libc_getgid getgid "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Getpgid(pid int) (pgid int, err error) {
-	r0, _, e1 := RawSyscall(SYS_GETPGID, uintptr(pid), 0, 0)
+	r0, _, e1 := rawSyscall(abi.FuncPCABI0(libc_getpgid_trampoline), uintptr(pid), 0, 0)
 	pgid = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -565,34 +738,50 @@ func Getpgid(pid int) (pgid int, err error) {
 	return
 }
 
+func libc_getpgid_trampoline()
+
+//go:cgo_import_dynamic libc_getpgid getpgid "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Getpgrp() (pgrp int) {
-	r0, _, _ := RawSyscall(SYS_GETPGRP, 0, 0, 0)
+	r0, _, _ := rawSyscall(abi.FuncPCABI0(libc_getpgrp_trampoline), 0, 0, 0)
 	pgrp = int(r0)
 	return
 }
 
+func libc_getpgrp_trampoline()
+
+//go:cgo_import_dynamic libc_getpgrp getpgrp "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Getpid() (pid int) {
-	r0, _, _ := RawSyscall(SYS_GETPID, 0, 0, 0)
+	r0, _, _ := rawSyscall(abi.FuncPCABI0(libc_getpid_trampoline), 0, 0, 0)
 	pid = int(r0)
 	return
 }
 
+func libc_getpid_trampoline()
+
+//go:cgo_import_dynamic libc_getpid getpid "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Getppid() (ppid int) {
-	r0, _, _ := RawSyscall(SYS_GETPPID, 0, 0, 0)
+	r0, _, _ := rawSyscall(abi.FuncPCABI0(libc_getppid_trampoline), 0, 0, 0)
 	ppid = int(r0)
 	return
 }
 
+func libc_getppid_trampoline()
+
+//go:cgo_import_dynamic libc_getppid getppid "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Getpriority(which int, who int) (prio int, err error) {
-	r0, _, e1 := Syscall(SYS_GETPRIORITY, uintptr(which), uintptr(who), 0)
+	r0, _, e1 := syscall(abi.FuncPCABI0(libc_getpriority_trampoline), uintptr(which), uintptr(who), 0)
 	prio = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -600,30 +789,42 @@ func Getpriority(which int, who int) (prio int, err error) {
 	return
 }
 
+func libc_getpriority_trampoline()
+
+//go:cgo_import_dynamic libc_getpriority getpriority "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Getrlimit(which int, lim *Rlimit) (err error) {
-	_, _, e1 := RawSyscall(SYS_GETRLIMIT, uintptr(which), uintptr(unsafe.Pointer(lim)), 0)
+	_, _, e1 := rawSyscall(abi.FuncPCABI0(libc_getrlimit_trampoline), uintptr(which), uintptr(unsafe.Pointer(lim)), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
+func libc_getrlimit_trampoline()
+
+//go:cgo_import_dynamic libc_getrlimit getrlimit "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Getrusage(who int, rusage *Rusage) (err error) {
-	_, _, e1 := RawSyscall(SYS_GETRUSAGE, uintptr(who), uintptr(unsafe.Pointer(rusage)), 0)
+	_, _, e1 := rawSyscall(abi.FuncPCABI0(libc_getrusage_trampoline), uintptr(who), uintptr(unsafe.Pointer(rusage)), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
+func libc_getrusage_trampoline()
+
+//go:cgo_import_dynamic libc_getrusage getrusage "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Getsid(pid int) (sid int, err error) {
-	r0, _, e1 := RawSyscall(SYS_GETSID, uintptr(pid), 0, 0)
+	r0, _, e1 := rawSyscall(abi.FuncPCABI0(libc_getsid_trampoline), uintptr(pid), 0, 0)
 	sid = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -631,46 +832,66 @@ func Getsid(pid int) (sid int, err error) {
 	return
 }
 
+func libc_getsid_trampoline()
+
+//go:cgo_import_dynamic libc_getsid getsid "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Gettimeofday(tv *Timeval) (err error) {
-	_, _, e1 := RawSyscall(SYS_GETTIMEOFDAY, uintptr(unsafe.Pointer(tv)), 0, 0)
+	_, _, e1 := rawSyscall(abi.FuncPCABI0(libc_gettimeofday_trampoline), uintptr(unsafe.Pointer(tv)), 0, 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
+func libc_gettimeofday_trampoline()
+
+//go:cgo_import_dynamic libc_gettimeofday gettimeofday "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Getuid() (uid int) {
-	r0, _, _ := RawSyscall(SYS_GETUID, 0, 0, 0)
+	r0, _, _ := rawSyscall(abi.FuncPCABI0(libc_getuid_trampoline), 0, 0, 0)
 	uid = int(r0)
 	return
 }
 
+func libc_getuid_trampoline()
+
+//go:cgo_import_dynamic libc_getuid getuid "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Issetugid() (tainted bool) {
-	r0, _, _ := Syscall(SYS_ISSETUGID, 0, 0, 0)
+	r0, _, _ := syscall(abi.FuncPCABI0(libc_issetugid_trampoline), 0, 0, 0)
 	tainted = bool(r0 != 0)
 	return
 }
 
+func libc_issetugid_trampoline()
+
+//go:cgo_import_dynamic libc_issetugid issetugid "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Kill(pid int, signum Signal) (err error) {
-	_, _, e1 := Syscall(SYS_KILL, uintptr(pid), uintptr(signum), 0)
+	_, _, e1 := syscall(abi.FuncPCABI0(libc_kill_trampoline), uintptr(pid), uintptr(signum), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
+func libc_kill_trampoline()
+
+//go:cgo_import_dynamic libc_kill kill "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Kqueue() (fd int, err error) {
-	r0, _, e1 := Syscall(SYS_KQUEUE, 0, 0, 0)
+	r0, _, e1 := syscall(abi.FuncPCABI0(libc_kqueue_trampoline), 0, 0, 0)
 	fd = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -678,6 +899,10 @@ func Kqueue() (fd int, err error) {
 	return
 }
 
+func libc_kqueue_trampoline()
+
+//go:cgo_import_dynamic libc_kqueue kqueue "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Lchown(path string, uid int, gid int) (err error) {
@@ -686,13 +911,17 @@ func Lchown(path string, uid int, gid int) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := Syscall(SYS_LCHOWN, uintptr(unsafe.Pointer(_p0)), uintptr(uid), uintptr(gid))
+	_, _, e1 := syscall(abi.FuncPCABI0(libc_lchown_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(uid), uintptr(gid))
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
+func libc_lchown_trampoline()
+
+//go:cgo_import_dynamic libc_lchown lchown "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Link(path string, link string) (err error) {
@@ -706,23 +935,31 @@ func Link(path string, link string) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := Syscall(SYS_LINK, uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), 0)
+	_, _, e1 := syscall(abi.FuncPCABI0(libc_link_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
+func libc_link_trampoline()
+
+//go:cgo_import_dynamic libc_link link "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Listen(s int, backlog int) (err error) {
-	_, _, e1 := Syscall(SYS_LISTEN, uintptr(s), uintptr(backlog), 0)
+	_, _, e1 := syscall(abi.FuncPCABI0(libc_listen_trampoline), uintptr(s), uintptr(backlog), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
+func libc_listen_trampoline()
+
+//go:cgo_import_dynamic libc_listen listen "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Lstat(path string, stat *Stat_t) (err error) {
@@ -731,13 +968,17 @@ func Lstat(path string, stat *Stat_t) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := Syscall(SYS_LSTAT, uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(stat)), 0)
+	_, _, e1 := syscall(abi.FuncPCABI0(libc_lstat_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(stat)), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
+func libc_lstat_trampoline()
+
+//go:cgo_import_dynamic libc_lstat lstat "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Mkdir(path string, mode uint32) (err error) {
@@ -746,13 +987,17 @@ func Mkdir(path string, mode uint32) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := Syscall(SYS_MKDIR, uintptr(unsafe.Pointer(_p0)), uintptr(mode), 0)
+	_, _, e1 := syscall(abi.FuncPCABI0(libc_mkdir_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(mode), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
+func libc_mkdir_trampoline()
+
+//go:cgo_import_dynamic libc_mkdir mkdir "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Mkfifo(path string, mode uint32) (err error) {
@@ -761,13 +1006,17 @@ func Mkfifo(path string, mode uint32) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := Syscall(SYS_MKFIFO, uintptr(unsafe.Pointer(_p0)), uintptr(mode), 0)
+	_, _, e1 := syscall(abi.FuncPCABI0(libc_mkfifo_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(mode), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
+func libc_mkfifo_trampoline()
+
+//go:cgo_import_dynamic libc_mkfifo mkfifo "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Mknod(path string, mode uint32, dev int) (err error) {
@@ -776,23 +1025,31 @@ func Mknod(path string, mode uint32, dev int) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := Syscall(SYS_MKNOD, uintptr(unsafe.Pointer(_p0)), uintptr(mode), uintptr(dev))
+	_, _, e1 := syscall(abi.FuncPCABI0(libc_mknod_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(mode), uintptr(dev))
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
+func libc_mknod_trampoline()
+
+//go:cgo_import_dynamic libc_mknod mknod "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Nanosleep(time *Timespec, leftover *Timespec) (err error) {
-	_, _, e1 := Syscall(SYS_NANOSLEEP, uintptr(unsafe.Pointer(time)), uintptr(unsafe.Pointer(leftover)), 0)
+	_, _, e1 := syscall(abi.FuncPCABI0(libc_nanosleep_trampoline), uintptr(unsafe.Pointer(time)), uintptr(unsafe.Pointer(leftover)), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
+func libc_nanosleep_trampoline()
+
+//go:cgo_import_dynamic libc_nanosleep nanosleep "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Open(path string, mode int, perm uint32) (fd int, err error) {
@@ -801,7 +1058,7 @@ func Open(path string, mode int, perm uint32) (fd int, err error) {
 	if err != nil {
 		return
 	}
-	r0, _, e1 := Syscall(SYS_OPEN, uintptr(unsafe.Pointer(_p0)), uintptr(mode), uintptr(perm))
+	r0, _, e1 := syscall(abi.FuncPCABI0(libc_open_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(mode), uintptr(perm))
 	fd = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -809,6 +1066,10 @@ func Open(path string, mode int, perm uint32) (fd int, err error) {
 	return
 }
 
+func libc_open_trampoline()
+
+//go:cgo_import_dynamic libc_open open "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Pathconf(path string, name int) (val int, err error) {
@@ -817,7 +1078,7 @@ func Pathconf(path string, name int) (val int, err error) {
 	if err != nil {
 		return
 	}
-	r0, _, e1 := Syscall(SYS_PATHCONF, uintptr(unsafe.Pointer(_p0)), uintptr(name), 0)
+	r0, _, e1 := syscall(abi.FuncPCABI0(libc_pathconf_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(name), 0)
 	val = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -825,6 +1086,10 @@ func Pathconf(path string, name int) (val int, err error) {
 	return
 }
 
+func libc_pathconf_trampoline()
+
+//go:cgo_import_dynamic libc_pathconf pathconf "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Pread(fd int, p []byte, offset int64) (n int, err error) {
@@ -834,7 +1099,7 @@ func Pread(fd int, p []byte, offset int64) (n int, err error) {
 	} else {
 		_p0 = unsafe.Pointer(&_zero)
 	}
-	r0, _, e1 := Syscall6(SYS_PREAD, uintptr(fd), uintptr(_p0), uintptr(len(p)), 0, uintptr(offset), uintptr(offset>>32))
+	r0, _, e1 := syscall6(abi.FuncPCABI0(libc_pread_trampoline), uintptr(fd), uintptr(_p0), uintptr(len(p)), 0, uintptr(offset), uintptr(offset>>32))
 	n = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -842,6 +1107,10 @@ func Pread(fd int, p []byte, offset int64) (n int, err error) {
 	return
 }
 
+func libc_pread_trampoline()
+
+//go:cgo_import_dynamic libc_pread pread "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Pwrite(fd int, p []byte, offset int64) (n int, err error) {
@@ -851,7 +1120,7 @@ func Pwrite(fd int, p []byte, offset int64) (n int, err error) {
 	} else {
 		_p0 = unsafe.Pointer(&_zero)
 	}
-	r0, _, e1 := Syscall6(SYS_PWRITE, uintptr(fd), uintptr(_p0), uintptr(len(p)), 0, uintptr(offset), uintptr(offset>>32))
+	r0, _, e1 := syscall6(abi.FuncPCABI0(libc_pwrite_trampoline), uintptr(fd), uintptr(_p0), uintptr(len(p)), 0, uintptr(offset), uintptr(offset>>32))
 	n = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -859,6 +1128,10 @@ func Pwrite(fd int, p []byte, offset int64) (n int, err error) {
 	return
 }
 
+func libc_pwrite_trampoline()
+
+//go:cgo_import_dynamic libc_pwrite pwrite "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func read(fd int, p []byte) (n int, err error) {
@@ -868,7 +1141,7 @@ func read(fd int, p []byte) (n int, err error) {
 	} else {
 		_p0 = unsafe.Pointer(&_zero)
 	}
-	r0, _, e1 := Syscall(SYS_READ, uintptr(fd), uintptr(_p0), uintptr(len(p)))
+	r0, _, e1 := syscall(abi.FuncPCABI0(libc_read_trampoline), uintptr(fd), uintptr(_p0), uintptr(len(p)))
 	n = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -876,6 +1149,10 @@ func read(fd int, p []byte) (n int, err error) {
 	return
 }
 
+func libc_read_trampoline()
+
+//go:cgo_import_dynamic libc_read read "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Readlink(path string, buf []byte) (n int, err error) {
@@ -890,7 +1167,7 @@ func Readlink(path string, buf []byte) (n int, err error) {
 	} else {
 		_p1 = unsafe.Pointer(&_zero)
 	}
-	r0, _, e1 := Syscall(SYS_READLINK, uintptr(unsafe.Pointer(_p0)), uintptr(_p1), uintptr(len(buf)))
+	r0, _, e1 := syscall(abi.FuncPCABI0(libc_readlink_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(_p1), uintptr(len(buf)))
 	n = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -898,6 +1175,10 @@ func Readlink(path string, buf []byte) (n int, err error) {
 	return
 }
 
+func libc_readlink_trampoline()
+
+//go:cgo_import_dynamic libc_readlink readlink "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Rename(from string, to string) (err error) {
@@ -911,13 +1192,17 @@ func Rename(from string, to string) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := Syscall(SYS_RENAME, uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), 0)
+	_, _, e1 := syscall(abi.FuncPCABI0(libc_rename_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
+func libc_rename_trampoline()
+
+//go:cgo_import_dynamic libc_rename rename "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Revoke(path string) (err error) {
@@ -926,13 +1211,17 @@ func Revoke(path string) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := Syscall(SYS_REVOKE, uintptr(unsafe.Pointer(_p0)), 0, 0)
+	_, _, e1 := syscall(abi.FuncPCABI0(libc_revoke_trampoline), uintptr(unsafe.Pointer(_p0)), 0, 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
+func libc_revoke_trampoline()
+
+//go:cgo_import_dynamic libc_revoke revoke "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Rmdir(path string) (err error) {
@@ -941,64 +1230,73 @@ func Rmdir(path string) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := Syscall(SYS_RMDIR, uintptr(unsafe.Pointer(_p0)), 0, 0)
+	_, _, e1 := syscall(abi.FuncPCABI0(libc_rmdir_trampoline), uintptr(unsafe.Pointer(_p0)), 0, 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+func libc_rmdir_trampoline()
 
-func Seek(fd int, offset int64, whence int) (newoffset int64, err error) {
-	r0, r1, e1 := Syscall6(SYS_LSEEK, uintptr(fd), 0, uintptr(offset), uintptr(offset>>32), uintptr(whence), 0)
-	newoffset = int64(int64(r1)<<32 | int64(r0))
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
+//go:cgo_import_dynamic libc_rmdir rmdir "libc.so"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Select(n int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (err error) {
-	_, _, e1 := Syscall6(SYS_SELECT, uintptr(n), uintptr(unsafe.Pointer(r)), uintptr(unsafe.Pointer(w)), uintptr(unsafe.Pointer(e)), uintptr(unsafe.Pointer(timeout)), 0)
+	_, _, e1 := syscall6(abi.FuncPCABI0(libc_select_trampoline), uintptr(n), uintptr(unsafe.Pointer(r)), uintptr(unsafe.Pointer(w)), uintptr(unsafe.Pointer(e)), uintptr(unsafe.Pointer(timeout)), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
+func libc_select_trampoline()
+
+//go:cgo_import_dynamic libc_select select "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Setegid(egid int) (err error) {
-	_, _, e1 := RawSyscall(SYS_SETEGID, uintptr(egid), 0, 0)
+	_, _, e1 := rawSyscall(abi.FuncPCABI0(libc_setegid_trampoline), uintptr(egid), 0, 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
+func libc_setegid_trampoline()
+
+//go:cgo_import_dynamic libc_setegid setegid "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Seteuid(euid int) (err error) {
-	_, _, e1 := RawSyscall(SYS_SETEUID, uintptr(euid), 0, 0)
+	_, _, e1 := rawSyscall(abi.FuncPCABI0(libc_seteuid_trampoline), uintptr(euid), 0, 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
+func libc_seteuid_trampoline()
+
+//go:cgo_import_dynamic libc_seteuid seteuid "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Setgid(gid int) (err error) {
-	_, _, e1 := RawSyscall(SYS_SETGID, uintptr(gid), 0, 0)
+	_, _, e1 := rawSyscall(abi.FuncPCABI0(libc_setgid_trampoline), uintptr(gid), 0, 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
+func libc_setgid_trampoline()
+
+//go:cgo_import_dynamic libc_setgid setgid "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Setlogin(name string) (err error) {
@@ -1007,67 +1305,91 @@ func Setlogin(name string) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := Syscall(SYS_SETLOGIN, uintptr(unsafe.Pointer(_p0)), 0, 0)
+	_, _, e1 := syscall(abi.FuncPCABI0(libc_setlogin_trampoline), uintptr(unsafe.Pointer(_p0)), 0, 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
+func libc_setlogin_trampoline()
+
+//go:cgo_import_dynamic libc_setlogin setlogin "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Setpgid(pid int, pgid int) (err error) {
-	_, _, e1 := RawSyscall(SYS_SETPGID, uintptr(pid), uintptr(pgid), 0)
+	_, _, e1 := rawSyscall(abi.FuncPCABI0(libc_setpgid_trampoline), uintptr(pid), uintptr(pgid), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
+func libc_setpgid_trampoline()
+
+//go:cgo_import_dynamic libc_setpgid setpgid "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Setpriority(which int, who int, prio int) (err error) {
-	_, _, e1 := Syscall(SYS_SETPRIORITY, uintptr(which), uintptr(who), uintptr(prio))
+	_, _, e1 := syscall(abi.FuncPCABI0(libc_setpriority_trampoline), uintptr(which), uintptr(who), uintptr(prio))
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
+func libc_setpriority_trampoline()
+
+//go:cgo_import_dynamic libc_setpriority setpriority "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Setregid(rgid int, egid int) (err error) {
-	_, _, e1 := RawSyscall(SYS_SETREGID, uintptr(rgid), uintptr(egid), 0)
+	_, _, e1 := rawSyscall(abi.FuncPCABI0(libc_setregid_trampoline), uintptr(rgid), uintptr(egid), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
+func libc_setregid_trampoline()
+
+//go:cgo_import_dynamic libc_setregid setregid "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Setreuid(ruid int, euid int) (err error) {
-	_, _, e1 := RawSyscall(SYS_SETREUID, uintptr(ruid), uintptr(euid), 0)
+	_, _, e1 := rawSyscall(abi.FuncPCABI0(libc_setreuid_trampoline), uintptr(ruid), uintptr(euid), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
+func libc_setreuid_trampoline()
+
+//go:cgo_import_dynamic libc_setreuid setreuid "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Setrlimit(which int, lim *Rlimit) (err error) {
-	_, _, e1 := RawSyscall(SYS_SETRLIMIT, uintptr(which), uintptr(unsafe.Pointer(lim)), 0)
+	_, _, e1 := rawSyscall(abi.FuncPCABI0(libc_setrlimit_trampoline), uintptr(which), uintptr(unsafe.Pointer(lim)), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
+func libc_setrlimit_trampoline()
+
+//go:cgo_import_dynamic libc_setrlimit setrlimit "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Setsid() (pid int, err error) {
-	r0, _, e1 := RawSyscall(SYS_SETSID, 0, 0, 0)
+	r0, _, e1 := rawSyscall(abi.FuncPCABI0(libc_setsid_trampoline), 0, 0, 0)
 	pid = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -1075,26 +1397,38 @@ func Setsid() (pid int, err error) {
 	return
 }
 
+func libc_setsid_trampoline()
+
+//go:cgo_import_dynamic libc_setsid setsid "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Settimeofday(tp *Timeval) (err error) {
-	_, _, e1 := RawSyscall(SYS_SETTIMEOFDAY, uintptr(unsafe.Pointer(tp)), 0, 0)
+	_, _, e1 := rawSyscall(abi.FuncPCABI0(libc_settimeofday_trampoline), uintptr(unsafe.Pointer(tp)), 0, 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
+func libc_settimeofday_trampoline()
+
+//go:cgo_import_dynamic libc_settimeofday settimeofday "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Setuid(uid int) (err error) {
-	_, _, e1 := RawSyscall(SYS_SETUID, uintptr(uid), 0, 0)
+	_, _, e1 := rawSyscall(abi.FuncPCABI0(libc_setuid_trampoline), uintptr(uid), 0, 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
+func libc_setuid_trampoline()
+
+//go:cgo_import_dynamic libc_setuid setuid "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Stat(path string, stat *Stat_t) (err error) {
@@ -1103,13 +1437,17 @@ func Stat(path string, stat *Stat_t) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := Syscall(SYS_STAT, uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(stat)), 0)
+	_, _, e1 := syscall(abi.FuncPCABI0(libc_stat_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(stat)), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
+func libc_stat_trampoline()
+
+//go:cgo_import_dynamic libc_stat stat "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Statfs(path string, stat *Statfs_t) (err error) {
@@ -1118,13 +1456,17 @@ func Statfs(path string, stat *Statfs_t) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := Syscall(SYS_STATFS, uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(stat)), 0)
+	_, _, e1 := syscall(abi.FuncPCABI0(libc_statfs_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(stat)), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
+func libc_statfs_trampoline()
+
+//go:cgo_import_dynamic libc_statfs statfs "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Symlink(path string, link string) (err error) {
@@ -1138,23 +1480,31 @@ func Symlink(path string, link string) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := Syscall(SYS_SYMLINK, uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), 0)
+	_, _, e1 := syscall(abi.FuncPCABI0(libc_symlink_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
+func libc_symlink_trampoline()
+
+//go:cgo_import_dynamic libc_symlink symlink "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Sync() (err error) {
-	_, _, e1 := Syscall(SYS_SYNC, 0, 0, 0)
+	_, _, e1 := syscall(abi.FuncPCABI0(libc_sync_trampoline), 0, 0, 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
+func libc_sync_trampoline()
+
+//go:cgo_import_dynamic libc_sync sync "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Truncate(path string, length int64) (err error) {
@@ -1163,21 +1513,29 @@ func Truncate(path string, length int64) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := Syscall6(SYS_TRUNCATE, uintptr(unsafe.Pointer(_p0)), 0, uintptr(length), uintptr(length>>32), 0, 0)
+	_, _, e1 := syscall6(abi.FuncPCABI0(libc_truncate_trampoline), uintptr(unsafe.Pointer(_p0)), 0, uintptr(length), uintptr(length>>32), 0, 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
+func libc_truncate_trampoline()
+
+//go:cgo_import_dynamic libc_truncate truncate "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Umask(newmask int) (oldmask int) {
-	r0, _, _ := Syscall(SYS_UMASK, uintptr(newmask), 0, 0)
+	r0, _, _ := syscall(abi.FuncPCABI0(libc_umask_trampoline), uintptr(newmask), 0, 0)
 	oldmask = int(r0)
 	return
 }
 
+func libc_umask_trampoline()
+
+//go:cgo_import_dynamic libc_umask umask "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Unlink(path string) (err error) {
@@ -1186,13 +1544,17 @@ func Unlink(path string) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := Syscall(SYS_UNLINK, uintptr(unsafe.Pointer(_p0)), 0, 0)
+	_, _, e1 := syscall(abi.FuncPCABI0(libc_unlink_trampoline), uintptr(unsafe.Pointer(_p0)), 0, 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
+func libc_unlink_trampoline()
+
+//go:cgo_import_dynamic libc_unlink unlink "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func Unmount(path string, flags int) (err error) {
@@ -1201,13 +1563,17 @@ func Unmount(path string, flags int) (err error) {
 	if err != nil {
 		return
 	}
-	_, _, e1 := Syscall(SYS_UNMOUNT, uintptr(unsafe.Pointer(_p0)), uintptr(flags), 0)
+	_, _, e1 := syscall(abi.FuncPCABI0(libc_unmount_trampoline), uintptr(unsafe.Pointer(_p0)), uintptr(flags), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
+func libc_unmount_trampoline()
+
+//go:cgo_import_dynamic libc_unmount unmount "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func write(fd int, p []byte) (n int, err error) {
@@ -1217,7 +1583,7 @@ func write(fd int, p []byte) (n int, err error) {
 	} else {
 		_p0 = unsafe.Pointer(&_zero)
 	}
-	r0, _, e1 := Syscall(SYS_WRITE, uintptr(fd), uintptr(_p0), uintptr(len(p)))
+	r0, _, e1 := syscall(abi.FuncPCABI0(libc_write_trampoline), uintptr(fd), uintptr(_p0), uintptr(len(p)))
 	n = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -1225,10 +1591,14 @@ func write(fd int, p []byte) (n int, err error) {
 	return
 }
 
+func libc_write_trampoline()
+
+//go:cgo_import_dynamic libc_write write "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func mmap(addr uintptr, length uintptr, prot int, flag int, fd int, pos int64) (ret uintptr, err error) {
-	r0, _, e1 := Syscall9(SYS_MMAP, uintptr(addr), uintptr(length), uintptr(prot), uintptr(flag), uintptr(fd), 0, uintptr(pos), uintptr(pos>>32), 0)
+	r0, _, e1 := syscall9(abi.FuncPCABI0(libc_mmap_trampoline), uintptr(addr), uintptr(length), uintptr(prot), uintptr(flag), uintptr(fd), 0, uintptr(pos), uintptr(pos>>32), 0)
 	ret = uintptr(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -1236,20 +1606,62 @@ func mmap(addr uintptr, length uintptr, prot int, flag int, fd int, pos int64) (
 	return
 }
 
+func libc_mmap_trampoline()
+
+//go:cgo_import_dynamic libc_mmap mmap "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func munmap(addr uintptr, length uintptr) (err error) {
-	_, _, e1 := Syscall(SYS_MUNMAP, uintptr(addr), uintptr(length), 0)
+	_, _, e1 := syscall(abi.FuncPCABI0(libc_munmap_trampoline), uintptr(addr), uintptr(length), 0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
+func libc_munmap_trampoline()
+
+//go:cgo_import_dynamic libc_munmap munmap "libc.so"
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func utimensat(dirfd int, path string, times *[2]Timespec, flag int) (err error) {
+	var _p0 *byte
+	_p0, err = BytePtrFromString(path)
+	if err != nil {
+		return
+	}
+	_, _, e1 := syscall6(abi.FuncPCABI0(libc_utimensat_trampoline), uintptr(dirfd), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(times)), uintptr(flag), 0, 0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+func libc_utimensat_trampoline()
+
+//go:cgo_import_dynamic libc_utimensat utimensat "libc.so"
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func directSyscall(trap uintptr, a1 uintptr, a2 uintptr, a3 uintptr, a4 uintptr, a5 uintptr) (ret uintptr, err error) {
+	r0, _, e1 := syscall6(abi.FuncPCABI0(libc_syscall_trampoline), uintptr(trap), uintptr(a1), uintptr(a2), uintptr(a3), uintptr(a4), uintptr(a5))
+	ret = uintptr(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+func libc_syscall_trampoline()
+
+//go:cgo_import_dynamic libc_syscall syscall "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func readlen(fd int, buf *byte, nbuf int) (n int, err error) {
-	r0, _, e1 := Syscall(SYS_READ, uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf))
+	r0, _, e1 := syscall(abi.FuncPCABI0(libc_read_trampoline), uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf))
 	n = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -1260,7 +1672,7 @@ func readlen(fd int, buf *byte, nbuf int) (n int, err error) {
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func writelen(fd int, buf *byte, nbuf int) (n int, err error) {
-	r0, _, e1 := Syscall(SYS_WRITE, uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf))
+	r0, _, e1 := syscall(abi.FuncPCABI0(libc_write_trampoline), uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf))
 	n = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
@@ -1270,19 +1682,19 @@ func writelen(fd int, buf *byte, nbuf int) (n int, err error) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func utimensat(dirfd int, path string, times *[2]Timespec, flag int) (err error) {
-	var _p0 *byte
-	_p0, err = BytePtrFromString(path)
-	if err != nil {
-		return
-	}
-	_, _, e1 := Syscall6(SYS_UTIMENSAT, uintptr(dirfd), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(times)), uintptr(flag), 0, 0)
+func Seek(fd int, offset int64, whence int) (newoffset int64, err error) {
+	r0, r1, e1 := syscall6X(abi.FuncPCABI0(libc_lseek_trampoline), uintptr(fd), 0, uintptr(offset), uintptr(offset>>32), uintptr(whence), 0)
+	newoffset = int64(int64(r1)<<32 | int64(r0))
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
 
+func libc_lseek_trampoline()
+
+//go:cgo_import_dynamic libc_lseek lseek "libc.so"
+
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func getcwd(buf []byte) (n int, err error) {
@@ -1292,10 +1704,195 @@ func getcwd(buf []byte) (n int, err error) {
 	} else {
 		_p0 = unsafe.Pointer(&_zero)
 	}
-	r0, _, e1 := Syscall(SYS___GETCWD, uintptr(_p0), uintptr(len(buf)), 0)
+	r0, _, e1 := syscall(abi.FuncPCABI0(libc_getcwd_trampoline), uintptr(_p0), uintptr(len(buf)), 0)
 	n = int(r0)
 	if e1 != 0 {
 		err = errnoErr(e1)
 	}
 	return
 }
+
+func libc_getcwd_trampoline()
+
+//go:cgo_import_dynamic libc_getcwd getcwd "libc.so"
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func sysctl(mib []_C_int, old *byte, oldlen *uintptr, new *byte, newlen uintptr) (err error) {
+	var _p0 unsafe.Pointer
+	if len(mib) > 0 {
+		_p0 = unsafe.Pointer(&mib[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	_, _, e1 := syscall6(abi.FuncPCABI0(libc_sysctl_trampoline), uintptr(_p0), uintptr(len(mib)), uintptr(unsafe.Pointer(old)), uintptr(unsafe.Pointer(oldlen)), uintptr(unsafe.Pointer(new)), uintptr(newlen))
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+func libc_sysctl_trampoline()
+
+//go:cgo_import_dynamic libc_sysctl sysctl "libc.so"
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func fork() (pid int, err error) {
+	r0, _, e1 := rawSyscall(abi.FuncPCABI0(libc_fork_trampoline), 0, 0, 0)
+	pid = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+func libc_fork_trampoline()
+
+//go:cgo_import_dynamic libc_fork fork "libc.so"
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func ioctl(fd int, req int, arg int) (err error) {
+	_, _, e1 := rawSyscall(abi.FuncPCABI0(libc_ioctl_trampoline), uintptr(fd), uintptr(req), uintptr(arg))
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+func libc_ioctl_trampoline()
+
+//go:cgo_import_dynamic libc_ioctl ioctl "libc.so"
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func execve(path *byte, argv **byte, envp **byte) (err error) {
+	_, _, e1 := rawSyscall(abi.FuncPCABI0(libc_execve_trampoline), uintptr(unsafe.Pointer(path)), uintptr(unsafe.Pointer(argv)), uintptr(unsafe.Pointer(envp)))
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+func libc_execve_trampoline()
+
+//go:cgo_import_dynamic libc_execve execve "libc.so"
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func exit(res int) (err error) {
+	_, _, e1 := rawSyscall(abi.FuncPCABI0(libc_exit_trampoline), uintptr(res), 0, 0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+func libc_exit_trampoline()
+
+//go:cgo_import_dynamic libc_exit exit "libc.so"
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+//go:nosplit
+func ptrace(request int, pid int, addr uintptr, data uintptr) (err error) {
+	_, _, e1 := syscall6(abi.FuncPCABI0(libc_ptrace_trampoline), uintptr(request), uintptr(pid), uintptr(addr), uintptr(data), 0, 0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+func libc_ptrace_trampoline()
+
+//go:cgo_import_dynamic libc_ptrace ptrace "libc.so"
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func getentropy(p []byte) (err error) {
+	var _p0 unsafe.Pointer
+	if len(p) > 0 {
+		_p0 = unsafe.Pointer(&p[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	_, _, e1 := rawSyscall(abi.FuncPCABI0(libc_getentropy_trampoline), uintptr(_p0), uintptr(len(p)), 0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+func libc_getentropy_trampoline()
+
+//go:cgo_import_dynamic libc_getentropy getentropy "libc.so"
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func fstatat(fd int, path string, stat *Stat_t, flags int) (err error) {
+	var _p0 *byte
+	_p0, err = BytePtrFromString(path)
+	if err != nil {
+		return
+	}
+	_, _, e1 := syscall6(abi.FuncPCABI0(libc_fstatat_trampoline), uintptr(fd), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(stat)), uintptr(flags), 0, 0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+func libc_fstatat_trampoline()
+
+//go:cgo_import_dynamic libc_fstatat fstatat "libc.so"
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func fcntlPtr(fd int, cmd int, arg unsafe.Pointer) (val int, err error) {
+	r0, _, e1 := syscall(abi.FuncPCABI0(libc_fcntl_trampoline), uintptr(fd), uintptr(cmd), uintptr(arg))
+	val = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func unlinkat(fd int, path string, flags int) (err error) {
+	var _p0 *byte
+	_p0, err = BytePtrFromString(path)
+	if err != nil {
+		return
+	}
+	_, _, e1 := syscall(abi.FuncPCABI0(libc_unlinkat_trampoline), uintptr(fd), uintptr(unsafe.Pointer(_p0)), uintptr(flags))
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+func libc_unlinkat_trampoline()
+
+//go:cgo_import_dynamic libc_unlinkat unlinkat "libc.so"
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func openat(fd int, path string, flags int, perm uint32) (fdret int, err error) {
+	var _p0 *byte
+	_p0, err = BytePtrFromString(path)
+	if err != nil {
+		return
+	}
+	r0, _, e1 := syscall6(abi.FuncPCABI0(libc_openat_trampoline), uintptr(fd), uintptr(unsafe.Pointer(_p0)), uintptr(flags), uintptr(perm), 0, 0)
+	fdret = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+func libc_openat_trampoline()
+
+//go:cgo_import_dynamic libc_openat openat "libc.so"
diff --git a/src/cmd/vendor/golang.org/x/sys/unix/zsyscall_darwin_arm.s b/src/syscall/zsyscall_openbsd_arm.s
similarity index 73%
rename from src/cmd/vendor/golang.org/x/sys/unix/zsyscall_darwin_arm.s
rename to src/syscall/zsyscall_openbsd_arm.s
index a99f9c1113..d33f3aa3e0 100644
--- a/src/cmd/vendor/golang.org/x/sys/unix/zsyscall_darwin_arm.s
+++ b/src/syscall/zsyscall_openbsd_arm.s
@@ -1,9 +1,5 @@
-// go run mkasm_darwin.go arm
+// go run mkasm.go openbsd arm
 // Code generated by the command above; DO NOT EDIT.
-
-//go:build go1.12
-// +build go1.12
-
 #include "textflag.h"
 TEXT ·libc_getgroups_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_getgroups(SB)
@@ -45,52 +41,14 @@ TEXT ·libc_utimes_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_utimes(SB)
 TEXT ·libc_futimes_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_futimes(SB)
-TEXT ·libc_poll_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_poll(SB)
-TEXT ·libc_madvise_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_madvise(SB)
-TEXT ·libc_mlock_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_mlock(SB)
-TEXT ·libc_mlockall_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_mlockall(SB)
-TEXT ·libc_mprotect_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_mprotect(SB)
-TEXT ·libc_msync_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_msync(SB)
-TEXT ·libc_munlock_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_munlock(SB)
-TEXT ·libc_munlockall_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_munlockall(SB)
-TEXT ·libc_pipe_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_pipe(SB)
-TEXT ·libc_getxattr_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_getxattr(SB)
-TEXT ·libc_fgetxattr_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_fgetxattr(SB)
-TEXT ·libc_setxattr_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_setxattr(SB)
-TEXT ·libc_fsetxattr_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_fsetxattr(SB)
-TEXT ·libc_removexattr_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_removexattr(SB)
-TEXT ·libc_fremovexattr_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_fremovexattr(SB)
-TEXT ·libc_listxattr_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_listxattr(SB)
-TEXT ·libc_flistxattr_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_flistxattr(SB)
-TEXT ·libc_setattrlist_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_setattrlist(SB)
 TEXT ·libc_fcntl_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_fcntl(SB)
-TEXT ·libc_kill_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_kill(SB)
-TEXT ·libc_ioctl_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_ioctl(SB)
-TEXT ·libc_sysctl_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_sysctl(SB)
-TEXT ·libc_sendfile_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_sendfile(SB)
+TEXT ·libc_pipe2_trampoline(SB),NOSPLIT,$0-0
+	JMP	libc_pipe2(SB)
+TEXT ·libc_accept4_trampoline(SB),NOSPLIT,$0-0
+	JMP	libc_accept4(SB)
+TEXT ·libc_getdents_trampoline(SB),NOSPLIT,$0-0
+	JMP	libc_getdents(SB)
 TEXT ·libc_access_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_access(SB)
 TEXT ·libc_adjtime_trampoline(SB),NOSPLIT,$0-0
@@ -105,50 +63,32 @@ TEXT ·libc_chown_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_chown(SB)
 TEXT ·libc_chroot_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_chroot(SB)
-TEXT ·libc_clock_gettime_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_clock_gettime(SB)
 TEXT ·libc_close_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_close(SB)
-TEXT ·libc_clonefile_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_clonefile(SB)
-TEXT ·libc_clonefileat_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_clonefileat(SB)
 TEXT ·libc_dup_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_dup(SB)
 TEXT ·libc_dup2_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_dup2(SB)
-TEXT ·libc_exchangedata_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_exchangedata(SB)
-TEXT ·libc_exit_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_exit(SB)
-TEXT ·libc_faccessat_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_faccessat(SB)
 TEXT ·libc_fchdir_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_fchdir(SB)
 TEXT ·libc_fchflags_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_fchflags(SB)
 TEXT ·libc_fchmod_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_fchmod(SB)
-TEXT ·libc_fchmodat_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_fchmodat(SB)
 TEXT ·libc_fchown_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_fchown(SB)
-TEXT ·libc_fchownat_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_fchownat(SB)
-TEXT ·libc_fclonefileat_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_fclonefileat(SB)
 TEXT ·libc_flock_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_flock(SB)
 TEXT ·libc_fpathconf_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_fpathconf(SB)
+TEXT ·libc_fstat_trampoline(SB),NOSPLIT,$0-0
+	JMP	libc_fstat(SB)
+TEXT ·libc_fstatfs_trampoline(SB),NOSPLIT,$0-0
+	JMP	libc_fstatfs(SB)
 TEXT ·libc_fsync_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_fsync(SB)
 TEXT ·libc_ftruncate_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_ftruncate(SB)
-TEXT ·libc_getcwd_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_getcwd(SB)
-TEXT ·libc_getdtablesize_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_getdtablesize(SB)
 TEXT ·libc_getegid_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_getegid(SB)
 TEXT ·libc_geteuid_trampoline(SB),NOSPLIT,$0-0
@@ -177,28 +117,28 @@ TEXT ·libc_getuid_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_getuid(SB)
 TEXT ·libc_issetugid_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_issetugid(SB)
+TEXT ·libc_kill_trampoline(SB),NOSPLIT,$0-0
+	JMP	libc_kill(SB)
 TEXT ·libc_kqueue_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_kqueue(SB)
 TEXT ·libc_lchown_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_lchown(SB)
 TEXT ·libc_link_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_link(SB)
-TEXT ·libc_linkat_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_linkat(SB)
 TEXT ·libc_listen_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_listen(SB)
+TEXT ·libc_lstat_trampoline(SB),NOSPLIT,$0-0
+	JMP	libc_lstat(SB)
 TEXT ·libc_mkdir_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_mkdir(SB)
-TEXT ·libc_mkdirat_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_mkdirat(SB)
 TEXT ·libc_mkfifo_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_mkfifo(SB)
 TEXT ·libc_mknod_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_mknod(SB)
+TEXT ·libc_nanosleep_trampoline(SB),NOSPLIT,$0-0
+	JMP	libc_nanosleep(SB)
 TEXT ·libc_open_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_open(SB)
-TEXT ·libc_openat_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_openat(SB)
 TEXT ·libc_pathconf_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_pathconf(SB)
 TEXT ·libc_pread_trampoline(SB),NOSPLIT,$0-0
@@ -209,18 +149,12 @@ TEXT ·libc_read_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_read(SB)
 TEXT ·libc_readlink_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_readlink(SB)
-TEXT ·libc_readlinkat_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_readlinkat(SB)
 TEXT ·libc_rename_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_rename(SB)
-TEXT ·libc_renameat_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_renameat(SB)
 TEXT ·libc_revoke_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_revoke(SB)
 TEXT ·libc_rmdir_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_rmdir(SB)
-TEXT ·libc_lseek_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_lseek(SB)
 TEXT ·libc_select_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_select(SB)
 TEXT ·libc_setegid_trampoline(SB),NOSPLIT,$0-0
@@ -235,8 +169,6 @@ TEXT ·libc_setpgid_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_setpgid(SB)
 TEXT ·libc_setpriority_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_setpriority(SB)
-TEXT ·libc_setprivexec_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_setprivexec(SB)
 TEXT ·libc_setregid_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_setregid(SB)
 TEXT ·libc_setreuid_trampoline(SB),NOSPLIT,$0-0
@@ -249,22 +181,20 @@ TEXT ·libc_settimeofday_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_settimeofday(SB)
 TEXT ·libc_setuid_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_setuid(SB)
+TEXT ·libc_stat_trampoline(SB),NOSPLIT,$0-0
+	JMP	libc_stat(SB)
+TEXT ·libc_statfs_trampoline(SB),NOSPLIT,$0-0
+	JMP	libc_statfs(SB)
 TEXT ·libc_symlink_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_symlink(SB)
-TEXT ·libc_symlinkat_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_symlinkat(SB)
 TEXT ·libc_sync_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_sync(SB)
 TEXT ·libc_truncate_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_truncate(SB)
 TEXT ·libc_umask_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_umask(SB)
-TEXT ·libc_undelete_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_undelete(SB)
 TEXT ·libc_unlink_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_unlink(SB)
-TEXT ·libc_unlinkat_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_unlinkat(SB)
 TEXT ·libc_unmount_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_unmount(SB)
 TEXT ·libc_write_trampoline(SB),NOSPLIT,$0-0
@@ -273,17 +203,31 @@ TEXT ·libc_mmap_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_mmap(SB)
 TEXT ·libc_munmap_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_munmap(SB)
-TEXT ·libc_fstat_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_fstat(SB)
+TEXT ·libc_utimensat_trampoline(SB),NOSPLIT,$0-0
+	JMP	libc_utimensat(SB)
+TEXT ·libc_syscall_trampoline(SB),NOSPLIT,$0-0
+	JMP	libc_syscall(SB)
+TEXT ·libc_lseek_trampoline(SB),NOSPLIT,$0-0
+	JMP	libc_lseek(SB)
+TEXT ·libc_getcwd_trampoline(SB),NOSPLIT,$0-0
+	JMP	libc_getcwd(SB)
+TEXT ·libc_sysctl_trampoline(SB),NOSPLIT,$0-0
+	JMP	libc_sysctl(SB)
+TEXT ·libc_fork_trampoline(SB),NOSPLIT,$0-0
+	JMP	libc_fork(SB)
+TEXT ·libc_ioctl_trampoline(SB),NOSPLIT,$0-0
+	JMP	libc_ioctl(SB)
+TEXT ·libc_execve_trampoline(SB),NOSPLIT,$0-0
+	JMP	libc_execve(SB)
+TEXT ·libc_exit_trampoline(SB),NOSPLIT,$0-0
+	JMP	libc_exit(SB)
+TEXT ·libc_ptrace_trampoline(SB),NOSPLIT,$0-0
+	JMP	libc_ptrace(SB)
+TEXT ·libc_getentropy_trampoline(SB),NOSPLIT,$0-0
+	JMP	libc_getentropy(SB)
 TEXT ·libc_fstatat_trampoline(SB),NOSPLIT,$0-0
 	JMP	libc_fstatat(SB)
-TEXT ·libc_fstatfs_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_fstatfs(SB)
-TEXT ·libc_getfsstat_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_getfsstat(SB)
-TEXT ·libc_lstat_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_lstat(SB)
-TEXT ·libc_stat_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_stat(SB)
-TEXT ·libc_statfs_trampoline(SB),NOSPLIT,$0-0
-	JMP	libc_statfs(SB)
+TEXT ·libc_unlinkat_trampoline(SB),NOSPLIT,$0-0
+	JMP	libc_unlinkat(SB)
+TEXT ·libc_openat_trampoline(SB),NOSPLIT,$0-0
+	JMP	libc_openat(SB)
diff --git a/src/syscall/zsyscall_windows.go b/src/syscall/zsyscall_windows.go
index 10d0f54e8c..7bfff16be6 100644
--- a/src/syscall/zsyscall_windows.go
+++ b/src/syscall/zsyscall_windows.go
@@ -43,6 +43,7 @@ var (
 	modkernel32 = NewLazyDLL(sysdll.Add("kernel32.dll"))
 	modmswsock  = NewLazyDLL(sysdll.Add("mswsock.dll"))
 	modnetapi32 = NewLazyDLL(sysdll.Add("netapi32.dll"))
+	modntdll    = NewLazyDLL(sysdll.Add("ntdll.dll"))
 	modsecur32  = NewLazyDLL(sysdll.Add("secur32.dll"))
 	modshell32  = NewLazyDLL(sysdll.Add("shell32.dll"))
 	moduserenv  = NewLazyDLL(sysdll.Add("userenv.dll"))
@@ -167,6 +168,7 @@ var (
 	procNetApiBufferFree                   = modnetapi32.NewProc("NetApiBufferFree")
 	procNetGetJoinInformation              = modnetapi32.NewProc("NetGetJoinInformation")
 	procNetUserGetInfo                     = modnetapi32.NewProc("NetUserGetInfo")
+	procRtlGetNtVersionNumbers             = modntdll.NewProc("RtlGetNtVersionNumbers")
 	procGetUserNameExW                     = modsecur32.NewProc("GetUserNameExW")
 	procTranslateNameW                     = modsecur32.NewProc("TranslateNameW")
 	procCommandLineToArgvW                 = modshell32.NewProc("CommandLineToArgvW")
@@ -1213,6 +1215,11 @@ func NetUserGetInfo(serverName *uint16, userName *uint16, level uint32, buf **by
 	return
 }
 
+func rtlGetNtVersionNumbers(majorVersion *uint32, minorVersion *uint32, buildNumber *uint32) {
+	Syscall(procRtlGetNtVersionNumbers.Addr(), 3, uintptr(unsafe.Pointer(majorVersion)), uintptr(unsafe.Pointer(minorVersion)), uintptr(unsafe.Pointer(buildNumber)))
+	return
+}
+
 func GetUserNameEx(nameFormat uint32, nameBuffre *uint16, nSize *uint32) (err error) {
 	r1, _, e1 := Syscall(procGetUserNameExW.Addr(), 3, uintptr(nameFormat), uintptr(unsafe.Pointer(nameBuffre)), uintptr(unsafe.Pointer(nSize)))
 	if r1&0xff == 0 {
diff --git a/src/testing/testing.go b/src/testing/testing.go
index 85a7fec65f..a19238d31e 100644
--- a/src/testing/testing.go
+++ b/src/testing/testing.go
@@ -233,6 +233,8 @@
 //		os.Exit(m.Run())
 //	}
 //
+// TestMain is a low-level primitive and should not be necessary for casual
+// testing needs, where ordinary test functions suffice.
 package testing
 
 import (
@@ -252,6 +254,8 @@ import (
 	"sync"
 	"sync/atomic"
 	"time"
+	"unicode"
+	"unicode/utf8"
 )
 
 var initRan bool
@@ -642,6 +646,7 @@ type TB interface {
 	Log(args ...interface{})
 	Logf(format string, args ...interface{})
 	Name() string
+	Setenv(key, value string)
 	Skip(args ...interface{})
 	SkipNow()
 	Skipf(format string, args ...interface{})
@@ -675,7 +680,11 @@ type T struct {
 
 func (c *common) private() {}
 
-// Name returns the name of the running test or benchmark.
+// Name returns the name of the running (sub-) test or benchmark.
+//
+// The name will include the name of the test along with the names of
+// any nested sub-tests. If two sibling sub-tests have the same name,
+// Name will append a suffix to guarantee the returned name is unique.
 func (c *common) Name() string {
 	return c.name
 }
@@ -908,11 +917,6 @@ func (c *common) Cleanup(f func()) {
 	c.cleanups = append(c.cleanups, fn)
 }
 
-var tempDirReplacer struct {
-	sync.Once
-	r *strings.Replacer
-}
-
 // TempDir returns a temporary directory for the test to use.
 // The directory is automatically removed by Cleanup when the test and
 // all its subtests complete.
@@ -936,13 +940,26 @@ func (c *common) TempDir() string {
 	if nonExistent {
 		c.Helper()
 
-		// os.MkdirTemp doesn't like path separators in its pattern,
-		// so mangle the name to accommodate subtests.
-		tempDirReplacer.Do(func() {
-			tempDirReplacer.r = strings.NewReplacer("/", "_", "\\", "_", ":", "_")
-		})
-		pattern := tempDirReplacer.r.Replace(c.Name())
-
+		// Drop unusual characters (such as path separators or
+		// characters interacting with globs) from the directory name to
+		// avoid surprising os.MkdirTemp behavior.
+		mapper := func(r rune) rune {
+			if r < utf8.RuneSelf {
+				const allowed = "!#$%&()+,-.=@^_{}~ "
+				if '0' <= r && r <= '9' ||
+					'a' <= r && r <= 'z' ||
+					'A' <= r && r <= 'Z' {
+					return r
+				}
+				if strings.ContainsRune(allowed, r) {
+					return r
+				}
+			} else if unicode.IsLetter(r) || unicode.IsNumber(r) {
+				return r
+			}
+			return -1
+		}
+		pattern := strings.Map(mapper, c.Name())
 		c.tempDir, c.tempDirErr = os.MkdirTemp("", pattern)
 		if c.tempDirErr == nil {
 			c.Cleanup(func() {
diff --git a/src/testing/testing_test.go b/src/testing/testing_test.go
index 55a4df4739..08ae23991f 100644
--- a/src/testing/testing_test.go
+++ b/src/testing/testing_test.go
@@ -58,6 +58,9 @@ func TestTempDir(t *testing.T) {
 	t.Run("test:subtest", testTempDir)
 	t.Run("test/..", testTempDir)
 	t.Run("../test", testTempDir)
+	t.Run("test[]", testTempDir)
+	t.Run("test*", testTempDir)
+	t.Run("äöüéè", testTempDir)
 }
 
 func testTempDir(t *testing.T) {
@@ -74,7 +77,7 @@ func testTempDir(t *testing.T) {
 			if err != nil {
 				t.Fatal(err)
 			}
-			t.Errorf("directory %q stil exists: %v, isDir=%v", dir, fi, fi.IsDir())
+			t.Errorf("directory %q still exists: %v, isDir=%v", dir, fi, fi.IsDir())
 		default:
 			if !t.Failed() {
 				t.Fatal("never received dir channel")
@@ -108,6 +111,11 @@ func testTempDir(t *testing.T) {
 	if len(files) > 0 {
 		t.Errorf("unexpected %d files in TempDir: %v", len(files), files)
 	}
+
+	glob := filepath.Join(dir, "*.txt")
+	if _, err := filepath.Glob(glob); err != nil {
+		t.Error(err)
+	}
 }
 
 func TestSetenv(t *testing.T) {
diff --git a/src/text/scanner/scanner.go b/src/text/scanner/scanner.go
index e0847a7239..c5fc4ff93b 100644
--- a/src/text/scanner/scanner.go
+++ b/src/text/scanner/scanner.go
@@ -23,7 +23,7 @@ import (
 	"unicode/utf8"
 )
 
-// A source position is represented by a Position value.
+// Position is a value that represents a source position.
 // A position is valid if Line > 0.
 type Position struct {
 	Filename string // filename, if any
diff --git a/src/time/format.go b/src/time/format.go
index f6dc8ee621..bb173a21c2 100644
--- a/src/time/format.go
+++ b/src/time/format.go
@@ -7,58 +7,18 @@ package time
 import "errors"
 
 // These are predefined layouts for use in Time.Format and time.Parse.
-// The reference time used in the layouts is the specific time:
-//	Mon Jan 2 15:04:05 MST 2006
-// which is Unix time 1136239445. Since MST is GMT-0700,
-// the reference time can be thought of as
+// The reference time used in these layouts is the specific time stamp:
 //	01/02 03:04:05PM '06 -0700
-// To define your own format, write down what the reference time would look
-// like formatted your way; see the values of constants like ANSIC,
-// StampMicro or Kitchen for examples. The model is to demonstrate what the
-// reference time looks like so that the Format and Parse methods can apply
-// the same transformation to a general time value.
+// (January 2, 15:04:05, 2006, in time zone seven hours west of GMT).
+// That value is recorded as the constant named Layout, listed below. As a Unix
+// time, this is 1136239445. Since MST is GMT-0700, the reference would be
+// printed by the Unix date command as:
+//	Mon Jan 2 15:04:05 MST 2006
+// It is a regrettable historic error that the date uses the American convention
+// of putting the numerical month before the day.
 //
-// Some valid layouts are invalid time values for time.Parse, due to formats
-// such as _ for space padding and Z for zone information.
-//
-// Within the format string, an underscore _ represents a space that may be
-// replaced by a digit if the following number (a day) has two digits; for
-// compatibility with fixed-width Unix time formats.
-//
-// A decimal point followed by one or more zeros represents a fractional
-// second, printed to the given number of decimal places.
-// Either a comma or decimal point followed by one or more nines represents
-// a fractional second, printed to the given number of decimal places, with
-// trailing zeros removed.
-// When parsing (only), the input may contain a fractional second
-// field immediately after the seconds field, even if the layout does not
-// signify its presence. In that case either a comma or a decimal point
-// followed by a maximal series of digits is parsed as a fractional second.
-//
-// Numeric time zone offsets format as follows:
-//	-0700  ±hhmm
-//	-07:00 ±hh:mm
-//	-07    ±hh
-// Replacing the sign in the format with a Z triggers
-// the ISO 8601 behavior of printing Z instead of an
-// offset for the UTC zone. Thus:
-//	Z0700  Z or ±hhmm
-//	Z07:00 Z or ±hh:mm
-//	Z07    Z or ±hh
-//
-// The recognized day of week formats are "Mon" and "Monday".
-// The recognized month formats are "Jan" and "January".
-//
-// The formats 2, _2, and 02 are unpadded, space-padded, and zero-padded
-// day of month. The formats __2 and 002 are space-padded and zero-padded
-// three-character day of year; there is no unpadded day of year format.
-//
-// Text in the format string that is not recognized as part of the reference
-// time is echoed verbatim during Format and expected to appear verbatim
-// in the input to Parse.
-//
-// The executable example for Time.Format demonstrates the working
-// of the layout string in detail and is a good reference.
+// The example for Time.Format demonstrates the working of the layout string
+// in detail and is a good reference.
 //
 // Note that the RFC822, RFC850, and RFC1123 formats should be applied
 // only to local times. Applying them to UTC times will use "UTC" as the
@@ -71,7 +31,65 @@ import "errors"
 // permitted by the RFCs and they do accept time formats not formally defined.
 // The RFC3339Nano format removes trailing zeros from the seconds field
 // and thus may not sort correctly once formatted.
+//
+// Most programs can use one of the defined constants as the layout passed to
+// Format or Parse. The rest of this comment can be ignored unless you are
+// creating a custom layout string.
+//
+// To define your own format, write down what the reference time would look like
+// formatted your way; see the values of constants like ANSIC, StampMicro or
+// Kitchen for examples. The model is to demonstrate what the reference time
+// looks like so that the Format and Parse methods can apply the same
+// transformation to a general time value.
+//
+// Here is a summary of the components of a layout string. Each element shows by
+// example the formatting of an element of the reference time. Only these values
+// are recognized. Text in the layout string that is not recognized as part of
+// the reference time is echoed verbatim during Format and expected to appear
+// verbatim in the input to Parse.
+//
+//	Year: "2006" "06"
+//	Month: "Jan" "January"
+//	Textual day of the week: "Mon" "Monday"
+//	Numeric day of the month: "2" "_2" "02"
+//	Numeric day of the year: "__2" "002"
+//	Hour: "15" "3" "03" (PM or AM)
+//	Minute: "4" "04"
+//	Second: "5" "05"
+//	AM/PM mark: "PM"
+//
+// Numeric time zone offsets format as follows:
+//	"-0700"  ±hhmm
+//	"-07:00" ±hh:mm
+//	"-07"    ±hh
+// Replacing the sign in the format with a Z triggers
+// the ISO 8601 behavior of printing Z instead of an
+// offset for the UTC zone. Thus:
+//	"Z0700"  Z or ±hhmm
+//	"Z07:00" Z or ±hh:mm
+//	"Z07"    Z or ±hh
+//
+// Within the format string, the underscores in "_2" and "__2" represent spaces
+// that may be replaced by digits if the following number has multiple digits,
+// for compatibility with fixed-width Unix time formats. A leading zero represents
+// a zero-padded value.
+//
+// The formats  and 002 are space-padded and zero-padded
+// three-character day of year; there is no unpadded day of year format.
+//
+// A decimal point followed by one or more zeros represents a fractional
+// second, printed to the given number of decimal places.
+// Either a comma or decimal point followed by one or more nines represents
+// a fractional second, printed to the given number of decimal places, with
+// trailing zeros removed.
+// For example "15:04:05,000" or "15:04:05.000" formats or parses with
+// millisecond precision.
+//
+// Some valid layouts are invalid time values for time.Parse, due to formats
+// such as _ for space padding and Z for zone information.
+//
 const (
+	Layout      = "01/02 03:04:05PM '06 -0700" // The reference time, in numerical order.
 	ANSIC       = "Mon Jan _2 15:04:05 2006"
 	UnixDate    = "Mon Jan _2 15:04:05 MST 2006"
 	RubyDate    = "Mon Jan 02 15:04:05 -0700 2006"
@@ -531,23 +549,12 @@ func (t Time) GoString() string {
 	return string(buf)
 }
 
-// Format returns a textual representation of the time value formatted
-// according to layout, which defines the format by showing how the reference
-// time, defined to be
-//	Mon Jan 2 15:04:05 -0700 MST 2006
-// would be displayed if it were the value; it serves as an example of the
-// desired output. The same display rules will then be applied to the time
-// value.
+// Format returns a textual representation of the time value formatted according
+// to the layout defined by the argument. See the documentation for the
+// constant called Layout to see how to represent the layout format.
 //
-// A fractional second is represented by adding either a comma or a
-// period and zeros to the end of the seconds section of layout string,
-// as in "15:04:05,000" or "15:04:05.000" to format a time stamp with
-// millisecond precision.
-//
-// Predefined layouts ANSIC, UnixDate, RFC3339 and others describe standard
-// and convenient representations of the reference time. For more information
-// about the formats and the definition of the reference time, see the
-// documentation for ANSIC and the other constants defined by this package.
+// The executable example for Time.Format demonstrates the working
+// of the layout string in detail and is a good reference.
 func (t Time) Format(layout string) string {
 	const bufSize = 64
 	var b []byte
@@ -744,8 +751,11 @@ type ParseError struct {
 
 // These are borrowed from unicode/utf8 and strconv and replicate behavior in
 // that package, since we can't take a dependency on either.
-const runeSelf = 0x80
-const lowerhex = "0123456789abcdef"
+const (
+	lowerhex  = "0123456789abcdef"
+	runeSelf  = 0x80
+	runeError = '\uFFFD'
+)
 
 func quote(s string) string {
 	buf := make([]byte, 1, len(s)+2) // slice will be at least len(s) + quotes
@@ -758,7 +768,16 @@ func quote(s string) string {
 			// reproduce strconv.Quote's behavior with full fidelity but
 			// given how rarely we expect to hit these edge cases, speed and
 			// conciseness are better.
-			for j := 0; j < len(string(c)) && j < len(s); j++ {
+			var width int
+			if c == runeError {
+				width = 1
+				if i+2 < len(s) && s[i:i+3] == string(runeError) {
+					width = 3
+				}
+			} else {
+				width = len(string(c))
+			}
+			for j := 0; j < width; j++ {
 				buf = append(buf, `\x`...)
 				buf = append(buf, lowerhex[s[i+j]>>4])
 				buf = append(buf, lowerhex[s[i+j]&0xF])
@@ -855,21 +874,19 @@ func skip(value, prefix string) (string, error) {
 }
 
 // Parse parses a formatted string and returns the time value it represents.
-// The layout defines the format by showing how the reference time,
-// defined to be
-//	Mon Jan 2 15:04:05 -0700 MST 2006
-// would be interpreted if it were the value; it serves as an example of
-// the input format. The same interpretation will then be made to the
-// input string.
+// See the documentation for the constant called Layout to see how to
+// represent the format. The second argument must be parseable using
+// the format string (layout) provided as the first argument.
 //
-// Predefined layouts ANSIC, UnixDate, RFC3339 and others describe standard
-// and convenient representations of the reference time. For more information
-// about the formats and the definition of the reference time, see the
-// documentation for ANSIC and the other constants defined by this package.
-// Also, the executable example for Time.Format demonstrates the working
-// of the layout string in detail and is a good reference.
+// The example for Time.Format demonstrates the working of the layout string
+// in detail and is a good reference.
 //
-// Elements omitted from the value are assumed to be zero or, when
+// When parsing (only), the input may contain a fractional second
+// field immediately after the seconds field, even if the layout does not
+// signify its presence. In that case either a comma or a decimal point
+// followed by a maximal series of digits is parsed as a fractional second.
+//
+// Elements omitted from the layout are assumed to be zero or, when
 // zero is impossible, one, so parsing "3:04pm" returns the time
 // corresponding to Jan 1, year 0, 15:04:00 UTC (note that because the year is
 // 0, this time is before the zero Time).
@@ -879,6 +896,8 @@ func skip(value, prefix string) (string, error) {
 // For layouts specifying the two-digit year 06, a value NN >= 69 will be treated
 // as 19NN and a value NN < 69 will be treated as 20NN.
 //
+// The remainder of this comment describes the handling of time zones.
+//
 // In the absence of a time zone indicator, Parse returns a time in UTC.
 //
 // When parsing a time with a zone offset like -0700, if the offset corresponds
diff --git a/src/time/sleep_test.go b/src/time/sleep_test.go
index 6ee0631a85..e0172bf5e0 100644
--- a/src/time/sleep_test.go
+++ b/src/time/sleep_test.go
@@ -527,6 +527,40 @@ func TestZeroTimer(t *testing.T) {
 	}
 }
 
+// Test that rapidly moving a timer earlier doesn't cause it to get dropped.
+// Issue 47329.
+func TestTimerModifiedEarlier(t *testing.T) {
+	past := Until(Unix(0, 0))
+	count := 1000
+	fail := 0
+	for i := 0; i < count; i++ {
+		timer := NewTimer(Hour)
+		for j := 0; j < 10; j++ {
+			if !timer.Stop() {
+				<-timer.C
+			}
+			timer.Reset(past)
+		}
+
+		deadline := NewTimer(10 * Second)
+		defer deadline.Stop()
+		now := Now()
+		select {
+		case <-timer.C:
+			if since := Since(now); since > 8*Second {
+				t.Errorf("timer took too long (%v)", since)
+				fail++
+			}
+		case <-deadline.C:
+			t.Error("deadline expired")
+		}
+	}
+
+	if fail > 0 {
+		t.Errorf("%d failures", fail)
+	}
+}
+
 // Benchmark timer latency when the thread that creates the timer is busy with
 // other work and the timers must be serviced by other threads.
 // https://golang.org/issue/38860
diff --git a/src/time/time.go b/src/time/time.go
index cd756bbf5f..4ecc3d82dc 100644
--- a/src/time/time.go
+++ b/src/time/time.go
@@ -1334,13 +1334,13 @@ func UnixMilli(msec int64) Time {
 }
 
 // UnixMicro returns the local Time corresponding to the given Unix time,
-// usec milliseconds since January 1, 1970 UTC.
+// usec microseconds since January 1, 1970 UTC.
 func UnixMicro(usec int64) Time {
 	return Unix(usec/1e6, (usec%1e6)*1e3)
 }
 
 // IsDST reports whether the time in the configured location is in Daylight Savings Time.
-func (t *Time) IsDST() bool {
+func (t Time) IsDST() bool {
 	_, _, _, _, isDST := t.loc.lookup(t.Unix())
 	return isDST
 }
diff --git a/src/time/time_test.go b/src/time/time_test.go
index f272bbd558..cea5f2d3f5 100644
--- a/src/time/time_test.go
+++ b/src/time/time_test.go
@@ -917,6 +917,11 @@ var parseDurationErrorTests = []struct {
 	{".s", `".s"`},
 	{"+.s", `"+.s"`},
 	{"1d", `"1d"`},
+	{"\x85\x85", `"\x85\x85"`},
+	{"\xffff", `"\xffff"`},
+	{"hello \xffff world", `"hello \xffff world"`},
+	{"\uFFFD", `"\xef\xbf\xbd"`},                                             // utf8.RuneError
+	{"\uFFFD hello \uFFFD world", `"\xef\xbf\xbd hello \xef\xbf\xbd world"`}, // utf8.RuneError
 	// overflow
 	{"9223372036854775810ns", `"9223372036854775810ns"`},
 	{"9223372036854775808ns", `"9223372036854775808ns"`},
diff --git a/src/unsafe/unsafe.go b/src/unsafe/unsafe.go
index ecbd28c523..16e3890d0b 100644
--- a/src/unsafe/unsafe.go
+++ b/src/unsafe/unsafe.go
@@ -217,12 +217,17 @@ func Alignof(x ArbitraryType) uintptr
 func Add(ptr Pointer, len IntegerType) Pointer
 
 // The function Slice returns a slice whose underlying array starts at ptr
-// and whose length and capacity are len:
+// and whose length and capacity are len.
+// Slice(ptr, len) is equivalent to
 //
 //	(*[len]ArbitraryType)(unsafe.Pointer(ptr))[:]
 //
+// except that, as a special case, if ptr is nil and len is zero,
+// Slice returns nil.
+//
 // The len argument must be of integer type or an untyped constant.
 // A constant len argument must be non-negative and representable by a value of type int;
 // if it is an untyped constant it is given type int.
-// If ptr is nil or len is negative at run time, a run-time panic occurs.
+// At run time, if len is negative, or if ptr is nil and len is not zero,
+// a run-time panic occurs.
 func Slice(ptr *ArbitraryType, len IntegerType) []ArbitraryType
diff --git a/src/vendor/golang.org/x/net/route/empty.s b/src/vendor/golang.org/x/net/route/empty.s
index bff0231c7d..90ab4ca3d8 100644
--- a/src/vendor/golang.org/x/net/route/empty.s
+++ b/src/vendor/golang.org/x/net/route/empty.s
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build darwin && go1.12
 // +build darwin,go1.12
 
 // This exists solely so we can linkname in symbols from syscall.
diff --git a/src/vendor/golang.org/x/sys/cpu/cpu.go b/src/vendor/golang.org/x/sys/cpu/cpu.go
index f77701fe86..abbec2d44b 100644
--- a/src/vendor/golang.org/x/sys/cpu/cpu.go
+++ b/src/vendor/golang.org/x/sys/cpu/cpu.go
@@ -154,14 +154,13 @@ var MIPS64X struct {
 // For ppc64/ppc64le, it is safe to check only for ISA level starting on ISA v3.00,
 // since there are no optional categories. There are some exceptions that also
 // require kernel support to work (DARN, SCV), so there are feature bits for
-// those as well. The minimum processor requirement is POWER8 (ISA 2.07).
-// The struct is padded to avoid false sharing.
+// those as well. The struct is padded to avoid false sharing.
 var PPC64 struct {
 	_        CacheLinePad
 	HasDARN  bool // Hardware random number generator (requires kernel enablement)
 	HasSCV   bool // Syscall vectored (requires kernel enablement)
 	IsPOWER8 bool // ISA v2.07 (POWER8)
-	IsPOWER9 bool // ISA v3.00 (POWER9)
+	IsPOWER9 bool // ISA v3.00 (POWER9), implies IsPOWER8
 	_        CacheLinePad
 }
 
diff --git a/src/vendor/golang.org/x/sys/cpu/cpu_aix.go b/src/vendor/golang.org/x/sys/cpu/cpu_aix.go
index 28b521643b..8aaeef545a 100644
--- a/src/vendor/golang.org/x/sys/cpu/cpu_aix.go
+++ b/src/vendor/golang.org/x/sys/cpu/cpu_aix.go
@@ -20,6 +20,7 @@ func archInit() {
 		PPC64.IsPOWER8 = true
 	}
 	if impl&_IMPL_POWER9 != 0 {
+		PPC64.IsPOWER8 = true
 		PPC64.IsPOWER9 = true
 	}
 
diff --git a/src/vendor/modules.txt b/src/vendor/modules.txt
index 5b939af60d..ff01db5cdc 100644
--- a/src/vendor/modules.txt
+++ b/src/vendor/modules.txt
@@ -8,7 +8,7 @@ golang.org/x/crypto/curve25519
 golang.org/x/crypto/hkdf
 golang.org/x/crypto/internal/subtle
 golang.org/x/crypto/poly1305
-# golang.org/x/net v0.0.0-20210505024714-0287a6fb4125
+# golang.org/x/net v0.0.0-20210510120150-4163338589ed
 ## explicit; go 1.17
 golang.org/x/net/dns/dnsmessage
 golang.org/x/net/http/httpguts
@@ -18,7 +18,7 @@ golang.org/x/net/idna
 golang.org/x/net/lif
 golang.org/x/net/nettest
 golang.org/x/net/route
-# golang.org/x/sys v0.0.0-20210503173754-0981d6026fa6
+# golang.org/x/sys v0.0.0-20210511113859-b0526f3d8744
 ## explicit; go 1.17
 golang.org/x/sys/cpu
 # golang.org/x/text v0.3.7-0.20210503195748-5c7c50ebbd4f
diff --git a/test/bench/go1/regexp_test.go b/test/bench/go1/regexp_test.go
index 3ce9f3a2c6..dd1034fde5 100644
--- a/test/bench/go1/regexp_test.go
+++ b/test/bench/go1/regexp_test.go
@@ -53,7 +53,7 @@ func BenchmarkRegexpMatchEasy0_32(b *testing.B)  { benchmark(b, easy0, 32<<0) }
 func BenchmarkRegexpMatchEasy0_1K(b *testing.B)  { benchmark(b, easy0, 1<<10) }
 func BenchmarkRegexpMatchEasy1_32(b *testing.B)  { benchmark(b, easy1, 32<<0) }
 func BenchmarkRegexpMatchEasy1_1K(b *testing.B)  { benchmark(b, easy1, 1<<10) }
-func BenchmarkRegexpMatchMedium_32(b *testing.B) { benchmark(b, medium, 1<<0) }
+func BenchmarkRegexpMatchMedium_32(b *testing.B) { benchmark(b, medium, 32<<0) }
 func BenchmarkRegexpMatchMedium_1K(b *testing.B) { benchmark(b, medium, 1<<10) }
 func BenchmarkRegexpMatchHard_32(b *testing.B)   { benchmark(b, hard, 32<<0) }
 func BenchmarkRegexpMatchHard_1K(b *testing.B)   { benchmark(b, hard, 1<<10) }
diff --git a/test/closure3.dir/main.go b/test/closure3.dir/main.go
index 2fc33753ed..662a2e967b 100644
--- a/test/closure3.dir/main.go
+++ b/test/closure3.dir/main.go
@@ -94,10 +94,10 @@ func main() {
 			return x + 2
 		}
 		y, sink = func() (func(int) int, int) { // ERROR "can inline main.func12"
-			return func(x int) int { // ERROR "can inline main.func12"
+			return func(x int) int { // ERROR "func literal does not escape" "can inline main.func12"
 				return x + 1
 			}, 42
-		}() // ERROR "func literal does not escape" "inlining call to main.func12"
+		}() // ERROR "inlining call to main.func12"
 		if y(40) != 41 {
 			ppanic("y(40) != 41")
 		}
@@ -109,10 +109,10 @@ func main() {
 				return x + 2
 			}
 			y, sink = func() (func(int) int, int) { // ERROR "can inline main.func13.2"
-				return func(x int) int { // ERROR "can inline main.func13.2"
+				return func(x int) int { // ERROR  "func literal does not escape" "can inline main.func13.2"
 					return x + 1
 				}, 42
-			}() // ERROR "inlining call to main.func13.2" "func literal does not escape"
+			}() // ERROR "inlining call to main.func13.2"
 			if y(40) != 41 {
 				ppanic("y(40) != 41")
 			}
diff --git a/test/codegen/copy.go b/test/codegen/copy.go
index 0cd86d1161..ea8a01f803 100644
--- a/test/codegen/copy.go
+++ b/test/codegen/copy.go
@@ -97,6 +97,42 @@ func moveDisjointNoOverlap(a *[256]byte) {
 	copy(a[:], a[128:])
 }
 
+// Check arch-specific memmove lowering. See issue 41662 fot details
+
+func moveArchLowering1(b []byte, x *[1]byte) {
+	_ = b[1]
+	// amd64:-".*memmove"
+	// arm64:-".*memmove"
+	copy(b, x[:])
+}
+
+func moveArchLowering2(b []byte, x *[2]byte) {
+	_ = b[2]
+	// amd64:-".*memmove"
+	// arm64:-".*memmove"
+	copy(b, x[:])
+}
+
+func moveArchLowering4(b []byte, x *[4]byte) {
+	_ = b[4]
+	// amd64:-".*memmove"
+	// arm64:-".*memmove"
+	copy(b, x[:])
+}
+
+func moveArchLowering8(b []byte, x *[8]byte) {
+	_ = b[8]
+	// amd64:-".*memmove"
+	// arm64:-".*memmove"
+	copy(b, x[:])
+}
+
+func moveArchLowering16(b []byte, x *[16]byte) {
+	_ = b[16]
+	// amd64:-".*memmove"
+	copy(b, x[:])
+}
+
 // Check that no branches are generated when the pointers are [not] equal.
 
 func ptrEqual() {
diff --git a/test/declbad.go b/test/declbad.go
index 728eceb7f1..b978652a2b 100644
--- a/test/declbad.go
+++ b/test/declbad.go
@@ -23,13 +23,13 @@ func main() {
 	{
 		// change of type for f
 		i, f, s := f3()
-		f, g, t := f3() // ERROR "redeclared|cannot assign|incompatible"
+		f, g, t := f3() // ERROR "redeclared|cannot assign|incompatible|cannot use"
 		_, _, _, _, _ = i, f, s, g, t
 	}
 	{
 		// change of type for i
 		i, f, s := f3()
-		j, i, t := f3() // ERROR "redeclared|cannot assign|incompatible"
+		j, i, t := f3() // ERROR "redeclared|cannot assign|incompatible|cannot use"
 		_, _, _, _, _ = i, f, s, j, t
 	}
 	{
diff --git a/test/fixedbugs/issue10607.go b/test/fixedbugs/issue10607.go
index 448a37dcac..8a04bc9def 100644
--- a/test/fixedbugs/issue10607.go
+++ b/test/fixedbugs/issue10607.go
@@ -1,4 +1,4 @@
-// +build linux,!ppc64,!riscv64,gc
+// +build linux,!ppc64,gc
 // run
 
 // Copyright 2015 The Go Authors. All rights reserved.
@@ -8,9 +8,6 @@
 // Test that a -B option is passed through when using both internal
 // and external linking mode.
 
-// TODO(jsing): Re-enable on riscv64 when it has support for external
-// linking - see golang.org/issue/36739
-
 package main
 
 import (
diff --git a/test/fixedbugs/issue46234.go b/test/fixedbugs/issue46234.go
new file mode 100644
index 0000000000..8e7eb8bf8d
--- /dev/null
+++ b/test/fixedbugs/issue46234.go
@@ -0,0 +1,103 @@
+// buildrun -t 30
+
+// +build !js
+
+// Copyright 2021 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Ensure that runtime traceback does not infinite loop for
+// the testcase below.
+
+package main
+
+import (
+	"bytes"
+	"io/ioutil"
+	"log"
+	"os"
+	"os/exec"
+	"path/filepath"
+)
+
+const prog = `
+
+package main
+
+import "context"
+
+var gpi *int
+
+type nAO struct {
+	eE bool
+}
+
+type NAO func(*nAO)
+
+func WEA() NAO {
+	return func(o *nAO) { o.eE = true }
+}
+
+type R struct {
+	cM *CM
+}
+
+type CM int
+
+type A string
+
+func (m *CM) NewA(ctx context.Context, cN string, nn *nAO, opts ...NAO) (*A, error) {
+	for _, o := range opts {
+		o(nn)
+	}
+	s := A("foo")
+	return &s, nil
+}
+
+func (r *R) CA(ctx context.Context, cN string, nn *nAO) (*int, error) {
+	cA, err := r.cM.NewA(ctx, cN, nn, WEA(), WEA())
+	if err == nil {
+		return nil, err
+	}
+	println(cA)
+	x := int(42)
+	return &x, nil
+}
+
+func main() {
+	c := CM(1)
+	r := R{cM: &c}
+	var ctx context.Context
+	nnr := nAO{}
+	pi, err := r.CA(ctx, "foo", nil)
+	if err != nil {
+		panic("bad")
+	}
+	println(nnr.eE)
+	gpi = pi
+}
+`
+
+func main() {
+	dir, err := ioutil.TempDir("", "46234")
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer os.RemoveAll(dir)
+
+	file := filepath.Join(dir, "main.go")
+	if err := ioutil.WriteFile(file, []byte(prog), 0655); err != nil {
+		log.Fatalf("Write error %v", err)
+	}
+
+	cmd := exec.Command("go", "run", file)
+	output, err := cmd.CombinedOutput()
+	if err == nil {
+		log.Fatalf("Passed, expected an error")
+	}
+
+	want := []byte("nil pointer dereference")
+	if !bytes.Contains(output, want) {
+		log.Fatalf("Unmatched error message %q:\nin\n%s\nError: %v", want, output, err)
+	}
+}
diff --git a/test/fixedbugs/issue46304.go b/test/fixedbugs/issue46304.go
new file mode 100644
index 0000000000..b8ecfc93a5
--- /dev/null
+++ b/test/fixedbugs/issue46304.go
@@ -0,0 +1,76 @@
+// run
+
+// Copyright 2021 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// This testcase caused a crash when the register ABI was in effect,
+// on amd64 (problem with register allocation).
+
+package main
+
+type Op struct {
+	tag   string
+	_x    []string
+	_q    [20]uint64
+	plist []P
+}
+
+type P struct {
+	tag string
+	_x  [10]uint64
+	b   bool
+}
+
+type M int
+
+//go:noinline
+func (w *M) walkP(p *P) *P {
+	np := &P{}
+	*np = *p
+	np.tag += "new"
+	return np
+}
+
+func (w *M) walkOp(op *Op) *Op {
+	if op == nil {
+		return nil
+	}
+
+	orig := op
+	cloned := false
+	clone := func() {
+		if !cloned {
+			cloned = true
+			op = &Op{}
+			*op = *orig
+		}
+	}
+
+	pCloned := false
+	for i := range op.plist {
+		if s := w.walkP(&op.plist[i]); s != &op.plist[i] {
+			if !pCloned {
+				pCloned = true
+				clone()
+				op.plist = make([]P, len(orig.plist))
+				copy(op.plist, orig.plist)
+			}
+			op.plist[i] = *s
+		}
+	}
+
+	return op
+}
+
+func main() {
+	var ww M
+	w := &ww
+	p1 := P{tag: "a"}
+	p1._x[1] = 9
+	o := Op{tag: "old", plist: []P{p1}}
+	no := w.walkOp(&o)
+	if no.plist[0].tag != "anew" {
+		panic("bad")
+	}
+}
diff --git a/test/fixedbugs/issue46386.go b/test/fixedbugs/issue46386.go
new file mode 100644
index 0000000000..89dea8abf3
--- /dev/null
+++ b/test/fixedbugs/issue46386.go
@@ -0,0 +1,32 @@
+// compile -p=main
+
+// Copyright 2021 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package main
+
+type I interface {
+	M() interface{}
+}
+
+type S1 struct{}
+
+func (S1) M() interface{} {
+	return nil
+}
+
+type EI interface{}
+
+type S struct{}
+
+func (S) M(as interface{ I }) {}
+
+func f() interface{ EI } {
+	return &S1{}
+}
+
+func main() {
+	var i interface{ I }
+	(&S{}).M(i)
+}
diff --git a/test/fixedbugs/issue46525.go b/test/fixedbugs/issue46525.go
new file mode 100644
index 0000000000..164e1473ce
--- /dev/null
+++ b/test/fixedbugs/issue46525.go
@@ -0,0 +1,14 @@
+// errorcheck -lang=go1.16
+
+// Copyright 2021 The Go Authors. All rights reserved.  Use of this
+// source code is governed by a BSD-style license that can be found in
+// the LICENSE file.
+
+package p
+
+import "unsafe"
+
+func main() {
+	_ = unsafe.Add(unsafe.Pointer(nil), 0) // ERROR "unsafe.Add requires go1.17 or later"
+	_ = unsafe.Slice(new(byte), 1)         // ERROR "unsafe.Slice requires go1.17 or later"
+}
diff --git a/test/fixedbugs/issue46653.dir/bad/bad.go b/test/fixedbugs/issue46653.dir/bad/bad.go
new file mode 100644
index 0000000000..c1611b8347
--- /dev/null
+++ b/test/fixedbugs/issue46653.dir/bad/bad.go
@@ -0,0 +1,64 @@
+// Copyright 2021 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package a
+
+func Bad() {
+	m := make(map[int64]A)
+	a := m[0]
+	if len(a.B.C1.D2.E2.F1) != 0 ||
+		len(a.B.C1.D2.E2.F2) != 0 ||
+		len(a.B.C1.D2.E2.F3) != 0 ||
+		len(a.B.C1.D2.E2.F4) != 0 ||
+		len(a.B.C1.D2.E2.F5) != 0 ||
+		len(a.B.C1.D2.E2.F6) != 0 ||
+		len(a.B.C1.D2.E2.F7) != 0 ||
+		len(a.B.C1.D2.E2.F8) != 0 ||
+		len(a.B.C1.D2.E2.F9) != 0 ||
+		len(a.B.C1.D2.E2.F10) != 0 ||
+		len(a.B.C1.D2.E2.F11) != 0 ||
+		len(a.B.C1.D2.E2.F16) != 0 {
+		panic("bad")
+	}
+}
+
+type A struct {
+	B
+}
+
+type B struct {
+	C1 C
+	C2 C
+}
+
+type C struct {
+	D1 D
+	D2 D
+}
+
+type D struct {
+	E1 E
+	E2 E
+	E3 E
+	E4 E
+}
+
+type E struct {
+	F1  string
+	F2  string
+	F3  string
+	F4  string
+	F5  string
+	F6  string
+	F7  string
+	F8  string
+	F9  string
+	F10 string
+	F11 string
+	F12 string
+	F13 string
+	F14 string
+	F15 string
+	F16 string
+}
diff --git a/test/fixedbugs/issue46653.dir/main.go b/test/fixedbugs/issue46653.dir/main.go
new file mode 100644
index 0000000000..e2a96e54ec
--- /dev/null
+++ b/test/fixedbugs/issue46653.dir/main.go
@@ -0,0 +1,27 @@
+// Copyright 2021 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package main
+
+import (
+	bad "issue46653.dir/bad"
+)
+
+func main() {
+	bad.Bad()
+}
+
+func neverCalled() L {
+	m := make(map[string]L)
+	return m[""]
+}
+
+type L struct {
+	A Data
+	B Data
+}
+
+type Data struct {
+	F1 [22][]string
+}
diff --git a/test/fixedbugs/issue46653.go b/test/fixedbugs/issue46653.go
new file mode 100644
index 0000000000..e6283b1de5
--- /dev/null
+++ b/test/fixedbugs/issue46653.go
@@ -0,0 +1,10 @@
+// runindir
+
+// Copyright 2021 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Test to verify compiler and linker handling of multiple
+// competing map.zero symbol definitions.
+
+package ignored
diff --git a/test/fixedbugs/issue46720.go b/test/fixedbugs/issue46720.go
new file mode 100644
index 0000000000..3b0151ae84
--- /dev/null
+++ b/test/fixedbugs/issue46720.go
@@ -0,0 +1,15 @@
+// compile
+
+// Copyright 2021 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package p
+
+func f() {
+	nonce := make([]byte, 24)
+	g((*[24]byte)(nonce))
+}
+
+//go:noinline
+func g(*[24]byte) {}
diff --git a/test/fixedbugs/issue46725.go b/test/fixedbugs/issue46725.go
new file mode 100644
index 0000000000..29799c7d7e
--- /dev/null
+++ b/test/fixedbugs/issue46725.go
@@ -0,0 +1,48 @@
+// run
+
+// Copyright 2021 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package main
+
+import "runtime"
+
+type T [4]int
+
+//go:noinline
+func g(x []*T) ([]*T, []*T) { return x, x }
+
+func main() {
+	const Jenny = 8675309
+	s := [10]*T{{Jenny}}
+
+	done := make(chan struct{})
+	runtime.SetFinalizer(s[0], func(p *T) { close(done) })
+
+	var h, _ interface{} = g(s[:])
+
+	if wait(done) {
+		panic("GC'd early")
+	}
+
+	if h.([]*T)[0][0] != Jenny {
+		panic("lost Jenny's number")
+	}
+
+	if !wait(done) {
+		panic("never GC'd")
+	}
+}
+
+func wait(done <-chan struct{}) bool {
+	for i := 0; i < 10; i++ {
+		runtime.GC()
+		select {
+		case <-done:
+			return true
+		default:
+		}
+	}
+	return false
+}
diff --git a/test/fixedbugs/issue46749.go b/test/fixedbugs/issue46749.go
new file mode 100644
index 0000000000..63ed19795e
--- /dev/null
+++ b/test/fixedbugs/issue46749.go
@@ -0,0 +1,37 @@
+// errorcheck
+
+// Copyright 2021 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package p
+
+var s string
+var b bool
+var i int
+var iface interface{}
+
+var (
+	_ = "" + b   // ERROR "invalid operation.*mismatched types.*untyped string and bool"
+	_ = "" + i   // ERROR "invalid operation.*mismatched types.*untyped string and int"
+	_ = "" + nil // ERROR "invalid operation.*mismatched types.*untyped string and nil"
+)
+
+var (
+	_ = s + false // ERROR "invalid operation.*mismatched types.*string and untyped bool"
+	_ = s + 1     // ERROR "invalid operation.*mismatched types.*string and untyped int"
+	_ = s + nil   // ERROR "invalid operation.*mismatched types.*string and nil"
+)
+
+var (
+	_ = "" + false // ERROR "invalid operation.*mismatched types.*untyped string and untyped bool"
+	_ = "" + 1     // ERROR "invalid operation.*mismatched types.*untyped string and untyped int"
+)
+
+var (
+	_ = b + 1         // ERROR "invalid operation.*mismatched types.*bool and untyped int"
+	_ = i + false     // ERROR "invalid operation.*mismatched types.*int and untyped bool"
+	_ = iface + 1     // ERROR "invalid operation.*mismatched types.*interface {} and int"
+	_ = iface + 1.0   // ERROR "invalid operation.*mismatched types.*interface {} and float64"
+	_ = iface + false // ERROR "invalid operation.*mismatched types.*interface {} and bool"
+)
diff --git a/test/fixedbugs/issue46907.go b/test/fixedbugs/issue46907.go
new file mode 100644
index 0000000000..bd82f4f2b1
--- /dev/null
+++ b/test/fixedbugs/issue46907.go
@@ -0,0 +1,11 @@
+// compile
+
+// Copyright 2021 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package p
+
+func f(b []byte) []byte {
+	return (*[32]byte)(b[:32])[:]
+}
diff --git a/test/fixedbugs/issue46957.go b/test/fixedbugs/issue46957.go
new file mode 100644
index 0000000000..f3ed3c3def
--- /dev/null
+++ b/test/fixedbugs/issue46957.go
@@ -0,0 +1,13 @@
+// errorcheck
+
+// Copyright 2021 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package main
+
+func f(a int, b ...int) {}
+
+func main() {
+	f(nil...) // ERROR "not enough arguments in call to f$"
+}
diff --git a/test/fixedbugs/issue47087.dir/a.go b/test/fixedbugs/issue47087.dir/a.go
new file mode 100644
index 0000000000..6093092ace
--- /dev/null
+++ b/test/fixedbugs/issue47087.dir/a.go
@@ -0,0 +1,9 @@
+// Copyright 2021 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package a
+
+func F() interface{} { return struct{ _ []int }{} }
+
+var X = F()
diff --git a/test/fixedbugs/issue47087.dir/b.go b/test/fixedbugs/issue47087.dir/b.go
new file mode 100644
index 0000000000..8f96d25a12
--- /dev/null
+++ b/test/fixedbugs/issue47087.dir/b.go
@@ -0,0 +1,9 @@
+// Copyright 2021 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package b
+
+func F() interface{} { return struct{ _ []int }{} }
+
+var X = F()
diff --git a/test/fixedbugs/issue47087.dir/main.go b/test/fixedbugs/issue47087.dir/main.go
new file mode 100644
index 0000000000..ccd0891a61
--- /dev/null
+++ b/test/fixedbugs/issue47087.dir/main.go
@@ -0,0 +1,19 @@
+// Copyright 2021 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package main
+
+import (
+	"a"
+	"b"
+)
+
+func main() {
+	if a.F() == b.F() {
+		panic("FAIL")
+	}
+	if a.X == b.X {
+		panic("FAIL")
+	}
+}
diff --git a/test/fixedbugs/issue47087.go b/test/fixedbugs/issue47087.go
new file mode 100644
index 0000000000..40df49f83b
--- /dev/null
+++ b/test/fixedbugs/issue47087.go
@@ -0,0 +1,7 @@
+// rundir
+
+// Copyright 2021 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package ignored
diff --git a/test/fixedbugs/issue47185.dir/bad/bad.go b/test/fixedbugs/issue47185.dir/bad/bad.go
new file mode 100644
index 0000000000..1aa4fbb909
--- /dev/null
+++ b/test/fixedbugs/issue47185.dir/bad/bad.go
@@ -0,0 +1,72 @@
+// Copyright 2021 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package a
+
+// Note that the use of CGO here is solely to trigger external
+// linking, since that is required to trigger that bad behavior
+// in this bug.
+
+// #include 
+import "C"
+
+func Bad() {
+	m := make(map[int64]A)
+	a := m[0]
+	if len(a.B.C1.D2.E2.F1) != 0 ||
+		len(a.B.C1.D2.E2.F2) != 0 ||
+		len(a.B.C1.D2.E2.F3) != 0 ||
+		len(a.B.C1.D2.E2.F4) != 0 ||
+		len(a.B.C1.D2.E2.F5) != 0 ||
+		len(a.B.C1.D2.E2.F6) != 0 ||
+		len(a.B.C1.D2.E2.F7) != 0 ||
+		len(a.B.C1.D2.E2.F8) != 0 ||
+		len(a.B.C1.D2.E2.F9) != 0 ||
+		len(a.B.C1.D2.E2.F10) != 0 ||
+		len(a.B.C1.D2.E2.F11) != 0 ||
+		len(a.B.C1.D2.E2.F16) != 0 {
+		panic("bad")
+	}
+	C.malloc(100)
+}
+
+type A struct {
+	B
+}
+
+type B struct {
+	C1 C
+	C2 C
+}
+
+type C struct {
+	D1 D
+	D2 D
+}
+
+type D struct {
+	E1 E
+	E2 E
+	E3 E
+	E4 E
+}
+
+type E struct {
+	F1  string
+	F2  string
+	F3  string
+	F4  string
+	F5  string
+	F6  string
+	F7  string
+	F8  string
+	F9  string
+	F10 string
+	F11 string
+	F12 string
+	F13 string
+	F14 string
+	F15 string
+	F16 string
+}
diff --git a/test/fixedbugs/issue47185.dir/main.go b/test/fixedbugs/issue47185.dir/main.go
new file mode 100644
index 0000000000..7b46e55d8b
--- /dev/null
+++ b/test/fixedbugs/issue47185.dir/main.go
@@ -0,0 +1,28 @@
+// Copyright 2021 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package main
+
+import (
+	bad "issue47185.dir/bad"
+)
+
+func main() {
+	another()
+	bad.Bad()
+}
+
+func another() L {
+	m := make(map[string]L)
+	return m[""]
+}
+
+type L struct {
+	A Data
+	B Data
+}
+
+type Data struct {
+	F1 [22][]string
+}
diff --git a/test/fixedbugs/issue47185.go b/test/fixedbugs/issue47185.go
new file mode 100644
index 0000000000..9c921b8698
--- /dev/null
+++ b/test/fixedbugs/issue47185.go
@@ -0,0 +1,11 @@
+// +build cgo
+// runindir
+
+// Copyright 2021 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Another test to verify compiler and linker handling of multiple
+// competing map.zero symbol definitions.
+
+package ignored
diff --git a/test/fixedbugs/issue47201.dir/a.go b/test/fixedbugs/issue47201.dir/a.go
new file mode 100644
index 0000000000..54b7079092
--- /dev/null
+++ b/test/fixedbugs/issue47201.dir/a.go
@@ -0,0 +1,13 @@
+// Copyright 2021 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package main
+
+import (
+	. "fmt"
+)
+
+func test() {
+	Println("foo")
+}
diff --git a/test/fixedbugs/issue47201.dir/b.go b/test/fixedbugs/issue47201.dir/b.go
new file mode 100644
index 0000000000..5fd0635af2
--- /dev/null
+++ b/test/fixedbugs/issue47201.dir/b.go
@@ -0,0 +1,9 @@
+// Copyright 2021 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package main
+
+func Println() {} // ERROR "Println redeclared in this block"
+
+func main() {}
diff --git a/test/fixedbugs/issue47201.go b/test/fixedbugs/issue47201.go
new file mode 100644
index 0000000000..e3a470b419
--- /dev/null
+++ b/test/fixedbugs/issue47201.go
@@ -0,0 +1,7 @@
+// errorcheckdir
+
+// Copyright 2021 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package ignored
diff --git a/test/fixedbugs/issue47317.dir/a.s b/test/fixedbugs/issue47317.dir/a.s
new file mode 100644
index 0000000000..b969ddb972
--- /dev/null
+++ b/test/fixedbugs/issue47317.dir/a.s
@@ -0,0 +1,6 @@
+// Copyright 2021 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+TEXT	·G(SB),4,$0
+	RET
diff --git a/test/fixedbugs/issue47317.dir/x.go b/test/fixedbugs/issue47317.dir/x.go
new file mode 100644
index 0000000000..83b5542144
--- /dev/null
+++ b/test/fixedbugs/issue47317.dir/x.go
@@ -0,0 +1,17 @@
+// Copyright 2021 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Issue 47317: ICE when calling ABI0 function via func value.
+
+package main
+
+func main() { F() }
+
+func F() interface{} {
+	g := G
+	g(1)
+	return G
+}
+
+func G(x int) [2]int
diff --git a/test/fixedbugs/issue47317.go b/test/fixedbugs/issue47317.go
new file mode 100644
index 0000000000..3548e90d02
--- /dev/null
+++ b/test/fixedbugs/issue47317.go
@@ -0,0 +1,7 @@
+// builddir
+
+// Copyright 2021 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package ignored
diff --git a/test/inline.go b/test/inline.go
index bc23768d01..472a941dca 100644
--- a/test/inline.go
+++ b/test/inline.go
@@ -92,9 +92,9 @@ func o() int {
 	foo := func() int { return 1 } // ERROR "can inline o.func1" "func literal does not escape"
 	func(x int) {                  // ERROR "can inline o.func2"
 		if x > 10 {
-			foo = func() int { return 2 } // ERROR "can inline o.func2"
+			foo = func() int { return 2 } // ERROR "func literal does not escape" "can inline o.func2"
 		}
-	}(11) // ERROR "func literal does not escape" "inlining call to o.func2"
+	}(11) // ERROR "inlining call to o.func2"
 	return foo()
 }
 
diff --git a/test/run.go b/test/run.go
index 5e60de7624..d7f5d02391 100644
--- a/test/run.go
+++ b/test/run.go
@@ -2002,4 +2002,5 @@ var excluded = map[string]bool{
 	"fixedbugs/issue7525c.go":  true, // types2 reports init cycle error on different line - ok otherwise
 	"fixedbugs/issue7525d.go":  true, // types2 reports init cycle error on different line - ok otherwise
 	"fixedbugs/issue7525e.go":  true, // types2 reports init cycle error on different line - ok otherwise
+	"fixedbugs/issue46749.go":  true, // types2 reports can not convert error instead of type mismatched
 }
diff --git a/test/unsafebuiltins.go b/test/unsafebuiltins.go
index c10f8084a7..4c940aa855 100644
--- a/test/unsafebuiltins.go
+++ b/test/unsafebuiltins.go
@@ -30,8 +30,11 @@ func main() {
 		assert(len(s) == len(p))
 		assert(cap(s) == len(p))
 
-		// nil pointer
-		mustPanic(func() { _ = unsafe.Slice((*int)(nil), 0) })
+		// nil pointer with zero length returns nil
+		assert(unsafe.Slice((*int)(nil), 0) == nil)
+
+		// nil pointer with positive length panics
+		mustPanic(func() { _ = unsafe.Slice((*int)(nil), 1) })
 
 		// negative length
 		var neg int = -1