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[dev.link] cmd/link: move macho asmb2 support to generic functions

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Change-Id: Ic360af7c0e8de3446aa8d26d70f95f87690087ee
Reviewed-on: https://go-review.googlesource.com/c/go/+/234883
Reviewed-by: Than McIntosh <thanm@google.com>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
This commit is contained in:
Jeremy Faller 2020-05-21 16:12:44 -04:00
parent 25b283bf8c
commit c551318046
5 changed files with 31 additions and 45 deletions
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19
src/cmd/link/internal/amd64/asm.go
View File

@ -680,9 +680,8 @@ func addgotsym(target *ld.Target, ldr *loader.Loader, syms *ld.ArchSyms, s loade
}
func asmb2(ctxt *ld.Link, _ *loader.Loader) {
machlink := int64(0)
if ctxt.HeadType == objabi.Hdarwin {
machlink = ld.Domacholink(ctxt)
if ctxt.IsDarwin() {
panic("darwin should be generic")
}
switch ctxt.HeadType {
@ -693,9 +692,6 @@ func asmb2(ctxt *ld.Link, _ *loader.Loader) {
case objabi.Hplan9:
break
case objabi.Hdarwin:
ld.Flag8 = true /* 64-bit addresses */
case objabi.Hlinux,
objabi.Hfreebsd,
objabi.Hnetbsd,
@ -719,9 +715,6 @@ func asmb2(ctxt *ld.Link, _ *loader.Loader) {
*ld.FlagS = true
symo = int64(ld.Segdata.Fileoff + ld.Segdata.Filelen)
case objabi.Hdarwin:
symo = int64(ld.Segdwarf.Fileoff + uint64(ld.Rnd(int64(ld.Segdwarf.Filelen), int64(*ld.FlagRound))) + uint64(machlink))
case objabi.Hlinux,
objabi.Hfreebsd,
objabi.Hnetbsd,
@ -754,11 +747,6 @@ func asmb2(ctxt *ld.Link, _ *loader.Loader) {
case objabi.Hwindows:
// Do nothing
case objabi.Hdarwin:
if ctxt.LinkMode == ld.LinkExternal {
ld.Machoemitreloc(ctxt)
}
}
}
@ -769,9 +757,6 @@ func asmb2(ctxt *ld.Link, _ *loader.Loader) {
magic := uint32(4*26*26 + 7)
ld.WritePlan9Header(ctxt.Out, magic, ld.Entryvalue(ctxt), true)
case objabi.Hdarwin:
ld.Asmbmacho(ctxt)
case objabi.Hlinux,
objabi.Hfreebsd,
objabi.Hnetbsd,

15
src/cmd/link/internal/arm64/asm.go
View File

@ -797,9 +797,8 @@ func addgotsym(target *ld.Target, ldr *loader.Loader, syms *ld.ArchSyms, s loade
}
func asmb2(ctxt *ld.Link, _ *loader.Loader) {
machlink := uint32(0)
if ctxt.HeadType == objabi.Hdarwin {
machlink = uint32(ld.Domacholink(ctxt))
if ctxt.IsDarwin() {
panic("darwin should be generic")
}
/* output symbol table */
@ -816,8 +815,6 @@ func asmb2(ctxt *ld.Link, _ *loader.Loader) {
symo = uint32(ld.Rnd(int64(symo), int64(*ld.FlagRound)))
}
case objabi.Hdarwin:
symo = uint32(ld.Segdwarf.Fileoff + uint64(ld.Rnd(int64(ld.Segdwarf.Filelen), int64(*ld.FlagRound))) + uint64(machlink))
}
ctxt.Out.SeekSet(int64(symo))
@ -831,11 +828,6 @@ func asmb2(ctxt *ld.Link, _ *loader.Loader) {
ld.Elfemitreloc(ctxt)
}
}
case objabi.Hdarwin:
if ctxt.LinkMode == ld.LinkExternal {
ld.Machoemitreloc(ctxt)
}
}
}
@ -847,9 +839,6 @@ func asmb2(ctxt *ld.Link, _ *loader.Loader) {
objabi.Hnetbsd,
objabi.Hopenbsd:
ld.Asmbelf(ctxt, int64(symo))
case objabi.Hdarwin:
ld.Asmbmacho(ctxt)
}
if *ld.FlagC {

22
src/cmd/link/internal/ld/asmb.go
View File

@ -69,6 +69,28 @@ func asmb(ctxt *Link, ldr *loader.Loader) {
wg.Wait()
}
// Assembling the binary is broken into two steps:
// - writing out the code/data/dwarf Segments
// - writing out the architecture specific pieces.
// This function handles the second part.
func asmb2(ctxt *Link) bool {
if ctxt.IsDarwin() {
machlink := Domacholink(ctxt)
Symsize = 0
Spsize = 0
Lcsize = 0
if !*FlagS && ctxt.IsExternal() {
symo := int64(Segdwarf.Fileoff + uint64(Rnd(int64(Segdwarf.Filelen), int64(*FlagRound))) + uint64(machlink))
ctxt.Out.SeekSet(symo)
Machoemitreloc(ctxt)
}
ctxt.Out.SeekSet(0)
Asmbmacho(ctxt)
return true
}
return false
}
// WritePlan9Header writes out the plan9 header at the present position in the OutBuf.
func WritePlan9Header(buf *OutBuf, magic uint32, entry int64, is64Bit bool) {
if is64Bit {

4
src/cmd/link/internal/ld/main.go
View File

@ -321,7 +321,9 @@ func Main(arch *sys.Arch, theArch Arch) {
bench.Start("reloc")
ctxt.reloc()
bench.Start("Asmb2")
thearch.Asmb2(ctxt, ctxt.loader)
if !asmb2(ctxt) {
thearch.Asmb2(ctxt, ctxt.loader)
}
bench.Start("Munmap")
ctxt.Out.Close() // Close handles Munmapping if necessary.

16
src/cmd/link/internal/x86/asm.go
View File

@ -511,9 +511,8 @@ func addgotsym(target *ld.Target, ldr *loader.Loader, syms *ld.ArchSyms, s loade
}
func asmb2(ctxt *ld.Link, _ *loader.Loader) {
machlink := uint32(0)
if ctxt.HeadType == objabi.Hdarwin {
machlink = uint32(ld.Domacholink(ctxt))
if ctxt.IsDarwin() {
panic("darwin should be generic")
}
ld.Symsize = 0
@ -532,9 +531,6 @@ func asmb2(ctxt *ld.Link, _ *loader.Loader) {
case objabi.Hplan9:
symo = uint32(ld.Segdata.Fileoff + ld.Segdata.Filelen)
case objabi.Hdarwin:
symo = uint32(ld.Segdwarf.Fileoff + uint64(ld.Rnd(int64(ld.Segdwarf.Filelen), int64(*ld.FlagRound))) + uint64(machlink))
case objabi.Hwindows:
symo = uint32(ld.Segdwarf.Fileoff + ld.Segdwarf.Filelen)
symo = uint32(ld.Rnd(int64(symo), ld.PEFILEALIGN))
@ -557,11 +553,6 @@ func asmb2(ctxt *ld.Link, _ *loader.Loader) {
case objabi.Hwindows:
// Do nothing
case objabi.Hdarwin:
if ctxt.LinkMode == ld.LinkExternal {
ld.Machoemitreloc(ctxt)
}
}
}
@ -572,9 +563,6 @@ func asmb2(ctxt *ld.Link, _ *loader.Loader) {
magic := uint32(4*11*11 + 7)
ld.WritePlan9Header(ctxt.Out, magic, ld.Entryvalue(ctxt), false)
case objabi.Hdarwin:
ld.Asmbmacho(ctxt)
case objabi.Hlinux,
objabi.Hfreebsd,
objabi.Hnetbsd,