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cmd/link: use symbolic offset for ITab.Type

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Change-Id: If04c24d5209cd241e300ce714efdd0e0dde61af2
Reviewed-on: https://go-review.googlesource.com/c/go/+/549456
Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: Than McIntosh <thanm@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
This commit is contained in:
Keith Randall 2023-12-12 21:25:14 -08:00
parent 977803e796
commit 109c7bbf8f
3 changed files with 7 additions and 1 deletions
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3
src/cmd/compile/internal/rttype/rttype.go
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@ -85,6 +85,9 @@ func Init() {
if got, want := int64(abi.TFlagOff(ptrSize)), Type.OffsetOf("TFlag"); got != want {
base.Fatalf("abi.TFlagOff() == %d, want %d", got, want)
}
if got, want := int64(abi.ITabTypeOff(ptrSize)), ITab.OffsetOf("Type"); got != want {
base.Fatalf("abi.ITabTypeOff() == %d, want %d", got, want)
}
}
// fromReflect translates from a host type to the equivalent target type.

2
src/cmd/link/internal/ld/decodesym.go
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@ -304,5 +304,5 @@ func decodetypeGcprogShlib(ctxt *Link, data []byte) uint64 {
// decodeItabType returns the itab.Type field from an itab.
func decodeItabType(ldr *loader.Loader, arch *sys.Arch, symIdx loader.Sym) loader.Sym {
relocs := ldr.Relocs(symIdx)
return decodeRelocSym(ldr, symIdx, &relocs, int32(arch.PtrSize))
return decodeRelocSym(ldr, symIdx, &relocs, int32(abi.ITabTypeOff(arch.PtrSize)))
}

3
src/internal/abi/compiletype.go
View File

@ -23,3 +23,6 @@ func UncommonSize() uint64 { return 4 + 2 + 2 + 4 + 4 }
// TFlagOff returns the offset of Type.TFlag for a compilation target with a given ptrSize
func TFlagOff(ptrSize int) int { return 2*ptrSize + 4 }
// ITabTypeOff returns the offset of ITab.Type for a compilation target with a given ptrSize
func ITabTypeOff(ptrSize int) int { return ptrSize }