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[dev.link] cmd/link: convert doelf to new style

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Change-Id: I448fe632ae73ddcb79c05793c96f48e358060305
Reviewed-on: https://go-review.googlesource.com/c/go/+/222977
Reviewed-by: Than McIntosh <thanm@google.com>
This commit is contained in:
Cherry Zhang 2020-03-11 12:12:41 -04:00
parent a8e8e05ed1
commit a3e965ce8a
15 changed files with 278 additions and 217 deletions
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32
src/cmd/link/internal/loader/symbolbuilder.go
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@ -60,6 +60,13 @@ func (l *Loader) MakeSymbolUpdater(symIdx Sym) *SymbolBuilder {
return sb
}
// CreateSymForUpdate creates a symbol with given name and version,
// returns a CreateSymForUpdate for update. If the symbol already
// exists, it will update in-place.
func (l *Loader) CreateSymForUpdate(name string, version int) *SymbolBuilder {
return l.MakeSymbolUpdater(l.LookupOrCreateSym(name, version))
}
// Getters for properties of the symbol we're working on.
func (sb *SymbolBuilder) Sym() Sym { return sb.symIdx }
@ -271,7 +278,7 @@ func (sb *SymbolBuilder) addRel() *Reloc {
return &sb.relocs[len(sb.relocs)-1]
}
func (sb *SymbolBuilder) addAddrPlus(tgt Sym, add int64, typ objabi.RelocType, rsize int) int64 {
func (sb *SymbolBuilder) addSymRef(tgt Sym, add int64, typ objabi.RelocType, rsize int) int64 {
if sb.kind == 0 {
sb.kind = sym.SDATA
}
@ -290,17 +297,34 @@ func (sb *SymbolBuilder) addAddrPlus(tgt Sym, add int64, typ objabi.RelocType, r
return i + int64(r.Size)
}
// Add a symbol reference (relocation) with given type, addend, and size
// (the most generic form).
func (sb *SymbolBuilder) AddSymRef(arch *sys.Arch, tgt Sym, add int64, typ objabi.RelocType, rsize int) int64 {
sb.setReachable()
return sb.addSymRef(tgt, add, typ, rsize)
}
func (sb *SymbolBuilder) AddAddrPlus(arch *sys.Arch, tgt Sym, add int64) int64 {
sb.setReachable()
return sb.addAddrPlus(tgt, add, objabi.R_ADDR, arch.PtrSize)
return sb.addSymRef(tgt, add, objabi.R_ADDR, arch.PtrSize)
}
func (sb *SymbolBuilder) AddAddrPlus4(arch *sys.Arch, tgt Sym, add int64) int64 {
sb.setReachable()
return sb.addAddrPlus(tgt, add, objabi.R_ADDR, 4)
return sb.addSymRef(tgt, add, objabi.R_ADDR, 4)
}
func (sb *SymbolBuilder) AddPCRelPlus(arch *sys.Arch, tgt Sym, add int64) int64 {
sb.setReachable()
return sb.addSymRef(tgt, add, objabi.R_PCREL, 4)
}
func (sb *SymbolBuilder) AddCURelativeAddrPlus(arch *sys.Arch, tgt Sym, add int64) int64 {
sb.setReachable()
return sb.addAddrPlus(tgt, add, objabi.R_ADDRCUOFF, arch.PtrSize)
return sb.addSymRef(tgt, add, objabi.R_ADDRCUOFF, arch.PtrSize)
}
func (sb *SymbolBuilder) AddSize(arch *sys.Arch, tgt Sym) int64 {
sb.setReachable()
return sb.addSymRef(tgt, 0, objabi.R_SIZE, arch.PtrSize)
}