qbit/go
1
0
Fork 0
mirror of https://github.com/golang/go synced 2024-09-28 22:24:29 -06:00
Code Releases Activity

cmd/link: on PPC64, put plt stubs at beginning of Textp

Browse Source 
Put call stubs at the beginning (instead of the end). So the
trampoline pass knows the addresses of the stubs, and it can
insert trampolines when necessary.

Fixes #19425.

Change-Id: I1e06529ef837a6130df58917315610d45a6819ca
Reviewed-on: https://go-review.googlesource.com/38131
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Lynn Boger <laboger@linux.vnet.ibm.com>
This commit is contained in:
Cherry Zhang 2017-03-13 08:24:46 -04:00
parent 43afcb5c96
commit 15b37655bc
1 changed files with 7 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
src/cmd/link/internal/ppc64/asm.go
View File

@ -87,6 +87,7 @@ func genplt(ctxt *ld.Link) {
//
// This assumes "case 1" from the ABI, where the caller needs
// us to save and restore the TOC pointer.
var stubs []*ld.Symbol
for _, s := range ctxt.Textp {
for i := range s.R {
r := &s.R[i]
@ -108,7 +109,7 @@ func genplt(ctxt *ld.Link) {
if stub.Size == 0 {
// Need outer to resolve .TOC.
stub.Outer = s
ctxt.Textp = append(ctxt.Textp, stub)
stubs = append(stubs, stub)
gencallstub(ctxt, 1, stub, r.Sym)
}
@ -121,6 +122,11 @@ func genplt(ctxt *ld.Link) {
ctxt.Arch.ByteOrder.PutUint32(s.P[r.Off+4:], o1)
}
}
// Put call stubs at the beginning (instead of the end).
// So when resolving the relocations to calls to the stubs,
// the addresses are known and trampolines can be inserted
// when necessary.
ctxt.Textp = append(stubs, ctxt.Textp...)
}
func genaddmoduledata(ctxt *ld.Link) {