diff options
| author | Shenghou Ma <minux@golang.org> | 2014-08-15 15:31:54 -0400 |
|---|---|---|
| committer | Shenghou Ma <minux@golang.org> | 2014-08-15 15:31:54 -0400 |
| commit | d0be55a66242cd8bea2f40b7ceca4b3651d0b720 (patch) | |
| tree | df741c58c7a415f85e7f36d6f9da1ff374c1e078 /src/liblink/obj9.c | |
| parent | e445f75dbc2e6a4f807017bd4f0cc935ab02c36a (diff) | |
| download | go-d0be55a66242cd8bea2f40b7ceca4b3651d0b720.tar.xz | |
[dev.power64] liblink: fix g->panicwrap update code generation
LGTM=rsc
R=golang-codereviews, rsc
CC=golang-codereviews
https://golang.org/cl/123400043
Diffstat (limited to 'src/liblink/obj9.c')
| -rw-r--r-- | src/liblink/obj9.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/src/liblink/obj9.c b/src/liblink/obj9.c index 3405fce477..28793676cc 100644 --- a/src/liblink/obj9.c +++ b/src/liblink/obj9.c @@ -512,6 +512,36 @@ addstacksplit(Link *ctxt, LSym *cursym) p->to.type = D_BRANCH; break; } + if(cursym->text->reg & WRAPPER) { + // g->panicwrap -= autosize; + // MOVWZ panicwrap_offset(g), R3 + // ADD $-autosize, R3 + // MOVWZ R3, panicwrap_offset(g) + p->as = AMOVWZ; + p->from.type = D_OREG; + p->from.reg = REGG; + p->from.offset = 2*ctxt->arch->ptrsize; + p->to.type = D_REG; + p->to.reg = 3; + p = appendp(ctxt, p); + + p->as = AADD; + p->from.type = D_CONST; + p->from.offset = -autosize; + p->to.type = D_REG; + p->to.reg = 3; + p = appendp(ctxt, p); + + p->as = AMOVWZ; + p->from.type = D_REG; + p->from.reg = 3; + p->to.type = D_OREG; + p->to.reg = REGG; + p->to.offset = 2*ctxt->arch->ptrsize; + p = appendp(ctxt, p); + + p->as = ARETURN; + } if(cursym->text->mark & LEAF) { if(!autosize) { p->as = ABR; |