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[dev.link] cmd/link: add loader.ExtReloc to Archreloc2

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Non functional, but required by the majority of the architectures.

Change-Id: I57601016c28ce665a9d434e283a1db8bded9b133
Reviewed-on: https://go-review.googlesource.com/c/go/+/230858
Run-TryBot: Jeremy Faller <jeremy@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
This commit is contained in:
Jeremy Faller 2020-04-29 12:20:38 -04:00
parent f886ff7b41
commit 65c1805e77
3 changed files with 16 additions and 13 deletions
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5
src/cmd/link/internal/ld/data.go
View File

@ -253,7 +253,10 @@ func relocsym(target *Target, ldr *loader.Loader, err *ErrorReporter, syms *Arch
case 8:
o = int64(target.Arch.ByteOrder.Uint64(P[off:]))
}
if out, ok := thearch.Archreloc2(target, ldr, syms, &r, s, o); ok {
var out int64
var ok bool
out, needExtReloc, ok = thearch.Archreloc2(target, ldr, syms, &r, &rr, s, o)
if ok {
o = out
} else {
err.Errorf(s, "unknown reloc to %v: %d (%s)", ldr.SymName(rs), rt, sym.RelocName(target.Arch, rt))

20
src/cmd/link/internal/ld/lib.go
View File

@ -235,18 +235,18 @@ type Arch struct {
Adddynrel func(*Target, *loader.Loader, *ArchSyms, *sym.Symbol, *sym.Reloc) bool
Adddynrel2 func(*Target, *loader.Loader, *ArchSyms, loader.Sym, *loader.Reloc2, int) bool
Archinit func(*Link)
// Archreloc is an arch-specific hook that assists in
// relocation processing (invoked by 'relocsym'); it handles
// target-specific relocation tasks. Here "rel" is the current
// relocation being examined, "sym" is the symbol containing the
// chunk of data to which the relocation applies, and "off" is the
// contents of the to-be-relocated data item (from sym.P). Return
// value is the appropriately relocated value (to be written back
// to the same spot in sym.P) and a boolean indicating
// success/failure (a failing value indicates a fatal error).
// Archreloc is an arch-specific hook that assists in relocation processing
// (invoked by 'relocsym'); it handles target-specific relocation tasks.
// Here "rel" is the current relocation being examined, "sym" is the symbol
// containing the chunk of data to which the relocation applies, and "off"
// is the contents of the to-be-relocated data item (from sym.P). Return
// value is the appropriately relocated value (to be written back to the
// same spot in sym.P), a boolean indicating if the external relocations'
// been used, and a boolean indicating success/failure (a failing value
// indicates a fatal error).
Archreloc func(target *Target, syms *ArchSyms, rel *sym.Reloc, sym *sym.Symbol,
offset int64) (relocatedOffset int64, success bool)
Archreloc2 func(*Target, *loader.Loader, *ArchSyms, *loader.Reloc2, loader.Sym, int64) (int64, bool)
Archreloc2 func(*Target, *loader.Loader, *ArchSyms, *loader.Reloc2, *loader.ExtReloc, loader.Sym, int64) (int64, bool, bool)
// Archrelocvariant is a second arch-specific hook used for
// relocation processing; it handles relocations where r.Type is
// insufficient to describe the relocation (r.Variant !=

4
src/cmd/link/internal/x86/asm.go
View File

@ -435,8 +435,8 @@ func pereloc1(arch *sys.Arch, out *ld.OutBuf, s *sym.Symbol, r *sym.Reloc, secto
return true
}
func archreloc2(target *ld.Target, ldr *loader.Loader, syms *ld.ArchSyms, r *loader.Reloc2, sym loader.Sym, val int64) (int64, bool) {
return val, false
func archreloc2(target *ld.Target, ldr *loader.Loader, syms *ld.ArchSyms, r *loader.Reloc2, rr *loader.ExtReloc, sym loader.Sym, val int64) (int64, bool, bool) {
return val, false, false
}
func archrelocvariant(target *ld.Target, syms *ld.ArchSyms, r *sym.Reloc, s *sym.Symbol, t int64) int64 {