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Revert "cmd/internal/obj: fix pc/sp information for prologue"

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This seems to have broken arm64 in a mysterious way. Will try again later.

This reverts commit 0a3c991fd3.

Change-Id: Ic1b53413c4168977a27381d9cc6fb8d9d7cbb780
Reviewed-on: https://go-review.googlesource.com/12245
Reviewed-by: Russ Cox <rsc@golang.org>
This commit is contained in:
Russ Cox 2015-07-15 23:28:31 +00:00
parent 88fc3587ec
commit 08dbd8ae6d
3 changed files with 3 additions and 28 deletions
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10
src/cmd/internal/obj/arm/obj5.go
View File

@ -804,12 +804,8 @@ func stacksplit(ctxt *obj.Link, p *obj.Prog, framesize int32) *obj.Prog {
for last = ctxt.Cursym.Text; last.Link != nil; last = last.Link {
}
spfix := obj.Appendp(ctxt, last)
spfix.As = obj.ANOP
spfix.Spadj = -framesize
// MOVW LR, R3
movw := obj.Appendp(ctxt, spfix)
movw := obj.Appendp(ctxt, last)
movw.As = AMOVW
movw.From.Type = obj.TYPE_REG
movw.From.Reg = REGLINK
@ -837,10 +833,6 @@ func stacksplit(ctxt *obj.Link, p *obj.Prog, framesize int32) *obj.Prog {
b.To.Type = obj.TYPE_BRANCH
b.Pcond = ctxt.Cursym.Text.Link
spfix = obj.Appendp(ctxt, b)
spfix.As = obj.ANOP
spfix.Spadj = +framesize
return bls
}

10
src/cmd/internal/obj/arm64/obj7.go
View File

@ -161,12 +161,8 @@ func stacksplit(ctxt *obj.Link, p *obj.Prog, framesize int32) *obj.Prog {
for last = ctxt.Cursym.Text; last.Link != nil; last = last.Link {
}
spfix := obj.Appendp(ctxt, last)
spfix.As = obj.ANOP
spfix.Spadj = -framesize
// MOV LR, R3
movlr := obj.Appendp(ctxt, spfix)
movlr := obj.Appendp(ctxt, last)
movlr.As = AMOVD
movlr.From.Type = obj.TYPE_REG
movlr.From.Reg = REGLINK
@ -206,10 +202,6 @@ func stacksplit(ctxt *obj.Link, p *obj.Prog, framesize int32) *obj.Prog {
jmp.To.Type = obj.TYPE_BRANCH
jmp.Pcond = ctxt.Cursym.Text.Link
spfix = obj.Appendp(ctxt, jmp)
spfix.As = obj.ANOP
spfix.Spadj = +framesize
// placeholder for bls's jump target
// p = obj.Appendp(ctxt, p)
// p.As = obj.ANOP

11
src/cmd/internal/obj/x86/obj6.go
View File

@ -975,12 +975,7 @@ func stacksplit(ctxt *obj.Link, p *obj.Prog, framesize int32, textarg int32) *ob
for last = ctxt.Cursym.Text; last.Link != nil; last = last.Link {
}
// Explain to PC-line tables that there is no frame here.
spfix := obj.Appendp(ctxt, last)
spfix.As = obj.ANOP
spfix.Spadj = -framesize
call := obj.Appendp(ctxt, spfix)
call := obj.Appendp(ctxt, last)
call.Lineno = ctxt.Cursym.Text.Lineno
call.Mode = ctxt.Cursym.Text.Mode
call.As = obj.ACALL
@ -999,10 +994,6 @@ func stacksplit(ctxt *obj.Link, p *obj.Prog, framesize int32, textarg int32) *ob
jmp.To.Type = obj.TYPE_BRANCH
jmp.Pcond = ctxt.Cursym.Text.Link
spfix = obj.Appendp(ctxt, jmp)
spfix.As = obj.ANOP
spfix.Spadj = +framesize
jls.Pcond = call
if q1 != nil {
q1.Pcond = call