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cmd/link: support windows/arm

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Enable the Go linker to generate executables for windows/arm.

Generates PE relocation tables, which are used by Windows to
dynamically relocate the Go binary in memory. Windows on ARM
requires all modules to be relocatable, unlike x86/amd64 which are
permitted to have fixed base addresses.

Updates #26148

Change-Id: Ie63964ff52c2377e121b2885e9d05ec3ed8dc1cd
Reviewed-on: https://go-review.googlesource.com/125648
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
This commit is contained in:
Jordan Rhee 2018-07-24 15:13:41 -07:00 • committed by Brad Fitzpatrick
parent 39e59da76d
commit aa311fecda
7 changed files with 338 additions and 57 deletions
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8
src/cmd/link/internal/ld/data.go
View file

@ -539,13 +539,17 @@ func windynrelocsym(ctxt *Link, s *sym.Symbol) {
r.Add = int64(targ.Plt)
// jmp *addr
if ctxt.Arch.Family == sys.I386 {
switch ctxt.Arch.Family {
default:
Errorf(s, "unsupported arch %v", ctxt.Arch.Family)
return
case sys.I386:
rel.AddUint8(0xff)
rel.AddUint8(0x25)
rel.AddAddr(ctxt.Arch, targ)
rel.AddUint8(0x90)
rel.AddUint8(0x90)
} else {
case sys.AMD64:
rel.AddUint8(0xff)
rel.AddUint8(0x24)
rel.AddUint8(0x25)