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cmd: improve aix/ppc64 new symbol addressing

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This commit updates the new symbol addressing made for aix/ppc64 according
to feedbacks given in CL 151039.

Change-Id: Ic4eb9943dc520d65f7d084adf8fa9a2530f4d3f9
Reviewed-on: https://go-review.googlesource.com/c/151302
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
This commit is contained in:
Clément Chigot 2018-11-28 13:38:02 +01:00 committed by Ian Lance Taylor
parent 179acf4083
commit 503091a77c
3 changed files with 16 additions and 6 deletions
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12
src/cmd/internal/obj/ppc64/asm9.go
View file

@ -2212,7 +2212,7 @@ func (c *ctxt9) opform(insn uint32) int {
// instruction op with source or destination (as appropriate) register reg.
func (c *ctxt9) symbolAccess(s *obj.LSym, d int64, reg int16, op uint32) (o1, o2 uint32) {
if c.ctxt.Headtype == objabi.Haix {
// Every symbol accesses must be made via a TOC anchor.
// Every symbol access must be made via a TOC anchor.
c.ctxt.Diag("symbolAccess called for %s", s.Name)
}
var base uint32
@ -3656,18 +3656,20 @@ func (c *ctxt9) asmout(p *obj.Prog, o *Optab, out []uint32) {
cy := int(c.regoff(p.GetFrom3()))
o1 = AOP_Z23I(c.oprrr(p.As), uint32(p.To.Reg), uint32(p.From.Reg), uint32(p.Reg), uint32(cy))
case 95: /* Retrieve TOC symbol */
v := c.vregoff(&p.To)
case 95: /* Retrieve TOC relative symbol */
/* This code is for AIX only */
v := c.vregoff(&p.From)
if v != 0 {
c.ctxt.Diag("invalid offset against TOC slot %v", p)
}
if c.opform(c.opload(p.As)) != DS_FORM {
inst := c.opload(p.As)
if c.opform(inst) != DS_FORM {
c.ctxt.Diag("invalid form for a TOC access in %v", p)
}
o1 = AOP_IRR(OP_ADDIS, uint32(p.To.Reg), REG_R2, 0)
o2 = AOP_IRR(c.opload(AMOVD), uint32(p.To.Reg), uint32(p.To.Reg), 0)
o2 = AOP_IRR(inst, uint32(p.To.Reg), uint32(p.To.Reg), 0)
rel := obj.Addrel(c.cursym)
rel.Off = int32(c.pc)
rel.Siz = 8

1
src/cmd/internal/obj/ppc64/obj9.go
View file

@ -114,6 +114,7 @@ func progedit(ctxt *obj.Link, p *obj.Prog, newprog obj.ProgAlloc) {
}
// Rewrite p, if necessary, to access a symbol using its TOC anchor.
// This code is for AIX only.
func (c *ctxt9) rewriteToUseTOC(p *obj.Prog) {
if p.As == obj.ATEXT || p.As == obj.AFUNCDATA || p.As == obj.ACALL || p.As == obj.ARET || p.As == obj.AJMP {
return

9
src/cmd/link/internal/ppc64/asm.go
View file

@ -383,7 +383,7 @@ func addelfdynrel(ctxt *ld.Link, s *sym.Symbol, r *sym.Reloc) bool {
func elfreloc1(ctxt *ld.Link, r *sym.Reloc, sectoff int64) bool {
// Beware that bit0~bit15 start from the third byte of a instruction in Big-Endian machines.
if r.Type == objabi.R_ADDR || r.Type == objabi.R_POWER_TLS || r.Type == objabi.R_CALLPOWER {
if r.Type == objabi.R_ADDR || r.Type == objabi.R_POWER_TLS || r.Type == objabi.R_CALLPOWER {
} else {
if ctxt.Arch.ByteOrder == binary.BigEndian {
sectoff += 2
@ -489,7 +489,12 @@ func symtoc(ctxt *ld.Link, s *sym.Symbol) int64 {
return toc.Value
}
// archreloctoc relocates a TOC relative symbol.
// This code is for AIX only.
func archreloctoc(ctxt *ld.Link, r *sym.Reloc, s *sym.Symbol, val int64) int64 {
if ctxt.HeadType == objabi.Hlinux {
ld.Errorf(s, "archrelocaddr called for %s relocation\n", r.Sym.Name)
}
var o1, o2 uint32
o1 = uint32(val >> 32)
@ -519,6 +524,8 @@ func archreloctoc(ctxt *ld.Link, r *sym.Reloc, s *sym.Symbol, val int64) int64 {
return int64(o1)<<32 | int64(o2)
}
// archrelocaddr relocates a symbol address.
// This code is for AIX only.
func archrelocaddr(ctxt *ld.Link, r *sym.Reloc, s *sym.Symbol, val int64) int64 {
if ctxt.HeadType == objabi.Haix {
ld.Errorf(s, "archrelocaddr called for %s relocation\n", r.Sym.Name)