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974b0166d6
Most architectures currently already implement Pipe using the pipe2
syscall. Only 386, amd64 and mips{,le} still use the pipe syscall.
However, some systems (e.g. Android seccomp policies) block that
syscall, see #40828 for an example.
The pipe2 syscall was added in Linux kernel version 2.6.27. The minimum
required Linux kernel version for Go 1.18 will be changed to 2.6.32
per #45964 so it is possible to unify the implementation of Pipe using
the pipe2 syscall.
For #45964
Change-Id: I8ed6a391300c95f3107b4ec6b27d320e42fb535b
Reviewed-on: https://go-review.googlesource.com/c/go/+/350530
Trust: Tobias Klauser <tobias.klauser@gmail.com>
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
194 lines
6.2 KiB
Go
194 lines
6.2 KiB
Go
// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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//go:build linux && (mips64 || mips64le)
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// +build linux
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// +build mips64 mips64le
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package syscall
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// archHonorsR2 captures the fact that r2 is honored by the
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// runtime.GOARCH. Syscall conventions are generally r1, r2, err :=
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// syscall(trap, ...). Not all architectures define r2 in their
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// ABI. See "man syscall".
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const archHonorsR2 = true
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const _SYS_setgroups = SYS_SETGROUPS
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//sys Dup2(oldfd int, newfd int) (err error)
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//sysnb EpollCreate(size int) (fd int, err error)
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//sys Fchown(fd int, uid int, gid int) (err error)
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//sys Fstatfs(fd int, buf *Statfs_t) (err error)
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//sys fstatat(dirfd int, path string, stat *Stat_t, flags int) (err error) = SYS_NEWFSTATAT
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//sys Ftruncate(fd int, length int64) (err error)
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//sysnb Getegid() (egid int)
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//sysnb Geteuid() (euid int)
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//sysnb Getgid() (gid int)
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//sysnb Getrlimit(resource int, rlim *Rlimit) (err error)
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//sysnb Getuid() (uid int)
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//sysnb InotifyInit() (fd int, err error)
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//sys Lchown(path string, uid int, gid int) (err error)
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//sys Listen(s int, n int) (err error)
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//sys Pause() (err error)
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//sys Pread(fd int, p []byte, offset int64) (n int, err error) = SYS_PREAD64
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//sys Pwrite(fd int, p []byte, offset int64) (n int, err error) = SYS_PWRITE64
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//sys Renameat(olddirfd int, oldpath string, newdirfd int, newpath string) (err error)
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//sys Seek(fd int, offset int64, whence int) (off int64, err error) = SYS_LSEEK
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//sys sendfile(outfd int, infd int, offset *int64, count int) (written int, err error)
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//sys Setfsgid(gid int) (err error)
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//sys Setfsuid(uid int) (err error)
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//sysnb Setrlimit(resource int, rlim *Rlimit) (err error)
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//sys Shutdown(fd int, how int) (err error)
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//sys Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int64, err error)
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//sys Statfs(path string, buf *Statfs_t) (err error)
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//sys SyncFileRange(fd int, off int64, n int64, flags int) (err error)
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//sys Truncate(path string, length int64) (err error)
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//sys Ustat(dev int, ubuf *Ustat_t) (err error)
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//sys accept(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (fd int, err error)
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//sys accept4(s int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (fd int, err error)
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//sys bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
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//sys connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
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//sysnb getgroups(n int, list *_Gid_t) (nn int, err error)
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//sys getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error)
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//sys setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) (err error)
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//sysnb socket(domain int, typ int, proto int) (fd int, err error)
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//sysnb socketpair(domain int, typ int, proto int, fd *[2]int32) (err error)
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//sysnb getpeername(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error)
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//sysnb getsockname(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error)
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//sys recvfrom(fd int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (n int, err error)
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//sys sendto(s int, buf []byte, flags int, to unsafe.Pointer, addrlen _Socklen) (err error)
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//sys recvmsg(s int, msg *Msghdr, flags int) (n int, err error)
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//sys sendmsg(s int, msg *Msghdr, flags int) (n int, err error)
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//sys mmap(addr uintptr, length uintptr, prot int, flags int, fd int, offset int64) (xaddr uintptr, err error)
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//sys EpollWait(epfd int, events []EpollEvent, msec int) (n int, err error)
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type sigset_t struct {
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X__val [16]uint64
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}
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//sys pselect(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timespec, sigmask *sigset_t) (n int, err error) = SYS_PSELECT6
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func Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error) {
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var ts *Timespec
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if timeout != nil {
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ts = &Timespec{Sec: timeout.Sec, Nsec: timeout.Usec * 1000}
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}
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return pselect(nfd, r, w, e, ts, nil)
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}
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//sys futimesat(dirfd int, path string, times *[2]Timeval) (err error)
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//sysnb Gettimeofday(tv *Timeval) (err error)
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func Time(t *Time_t) (tt Time_t, err error) {
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var tv Timeval
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err = Gettimeofday(&tv)
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if err != nil {
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return 0, err
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}
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if t != nil {
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*t = Time_t(tv.Sec)
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}
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return Time_t(tv.Sec), nil
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}
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//sys Utime(path string, buf *Utimbuf) (err error)
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//sys utimes(path string, times *[2]Timeval) (err error)
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func setTimespec(sec, nsec int64) Timespec {
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return Timespec{Sec: sec, Nsec: nsec}
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}
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func setTimeval(sec, usec int64) Timeval {
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return Timeval{Sec: sec, Usec: usec}
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}
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func Ioperm(from int, num int, on int) (err error) {
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return ENOSYS
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}
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func Iopl(level int) (err error) {
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return ENOSYS
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}
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type stat_t struct {
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Dev uint32
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Pad0 [3]int32
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Ino uint64
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Mode uint32
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Nlink uint32
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Uid uint32
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Gid uint32
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Rdev uint32
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Pad1 [3]uint32
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Size int64
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Atime uint32
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Atime_nsec uint32
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Mtime uint32
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Mtime_nsec uint32
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Ctime uint32
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Ctime_nsec uint32
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Blksize uint32
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Pad2 uint32
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Blocks int64
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}
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//sys fstat(fd int, st *stat_t) (err error)
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//sys lstat(path string, st *stat_t) (err error)
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//sys stat(path string, st *stat_t) (err error)
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func Fstat(fd int, s *Stat_t) (err error) {
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st := &stat_t{}
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err = fstat(fd, st)
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fillStat_t(s, st)
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return
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}
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func Lstat(path string, s *Stat_t) (err error) {
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st := &stat_t{}
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err = lstat(path, st)
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fillStat_t(s, st)
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return
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}
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func Stat(path string, s *Stat_t) (err error) {
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st := &stat_t{}
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err = stat(path, st)
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fillStat_t(s, st)
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return
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}
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func fillStat_t(s *Stat_t, st *stat_t) {
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s.Dev = st.Dev
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s.Ino = st.Ino
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s.Mode = st.Mode
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s.Nlink = st.Nlink
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s.Uid = st.Uid
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s.Gid = st.Gid
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s.Rdev = st.Rdev
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s.Size = st.Size
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s.Atim = Timespec{int64(st.Atime), int64(st.Atime_nsec)}
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s.Mtim = Timespec{int64(st.Mtime), int64(st.Mtime_nsec)}
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s.Ctim = Timespec{int64(st.Ctime), int64(st.Ctime_nsec)}
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s.Blksize = st.Blksize
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s.Blocks = st.Blocks
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}
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func (r *PtraceRegs) PC() uint64 { return r.Regs[64] }
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func (r *PtraceRegs) SetPC(pc uint64) { r.Regs[64] = pc }
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func (iov *Iovec) SetLen(length int) {
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iov.Len = uint64(length)
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}
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func (msghdr *Msghdr) SetControllen(length int) {
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msghdr.Controllen = uint64(length)
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}
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func (cmsg *Cmsghdr) SetLen(length int) {
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cmsg.Len = uint64(length)
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}
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func rawVforkSyscall(trap, a1 uintptr) (r1 uintptr, err Errno)
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