diff options
Diffstat (limited to 'src/cmd')
| -rw-r--r-- | src/cmd/internal/obj/plist.go | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/src/cmd/internal/obj/plist.go b/src/cmd/internal/obj/plist.go index 348a16356e..e5bbdd51a7 100644 --- a/src/cmd/internal/obj/plist.go +++ b/src/cmd/internal/obj/plist.go @@ -54,11 +54,28 @@ func Flushplist(ctxt *Link, plist *Plist, newprog ProgAlloc, myimportpath string if curtext == nil { // func _() {} continue } - if p.To.Sym.Name == "go_args_stackmap" { + switch p.To.Sym.Name { + case "go_args_stackmap": if p.From.Type != TYPE_CONST || p.From.Offset != objabi.FUNCDATA_ArgsPointerMaps { ctxt.Diag("FUNCDATA use of go_args_stackmap(SB) without FUNCDATA_ArgsPointerMaps") } p.To.Sym = ctxt.LookupDerived(curtext, curtext.Name+".args_stackmap") + case "no_pointers_stackmap": + if p.From.Type != TYPE_CONST || p.From.Offset != objabi.FUNCDATA_LocalsPointerMaps { + ctxt.Diag("FUNCDATA use of no_pointers_stackmap(SB) without FUNCDATA_LocalsPointerMaps") + } + // funcdata for functions with no local variables in frame. + // Define two zero-length bitmaps, because the same index is used + // for the local variables as for the argument frame, and assembly + // frames have two argument bitmaps, one without results and one with results. + // Write []uint32{2, 0}. + b := make([]byte, 8) + ctxt.Arch.ByteOrder.PutUint32(b, 2) + s := ctxt.GCLocalsSym(b) + if !s.OnList() { + ctxt.Globl(s, int64(len(s.P)), int(RODATA|DUPOK)) + } + p.To.Sym = s } } |