diff options
Diffstat (limited to 'src/cmd/internal/obj/mips/obj0.go')
| -rw-r--r-- | src/cmd/internal/obj/mips/obj0.go | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/src/cmd/internal/obj/mips/obj0.go b/src/cmd/internal/obj/mips/obj0.go index f096c7ff14..3d8e91ce44 100644 --- a/src/cmd/internal/obj/mips/obj0.go +++ b/src/cmd/internal/obj/mips/obj0.go @@ -339,6 +339,10 @@ func preprocess(ctxt *obj.Link, cursym *obj.LSym, newprog obj.ProgAlloc) { // Store link register before decrement SP, so if a signal comes // during the execution of the function prologue, the traceback // code will not see a half-updated stack frame. + // This sequence is not async preemptible, as if we open a frame + // at the current SP, it will clobber the saved LR. + q = c.ctxt.StartUnsafePoint(q, c.newprog) + q = obj.Appendp(q, newprog) q.As = mov q.Pos = p.Pos @@ -356,6 +360,8 @@ func preprocess(ctxt *obj.Link, cursym *obj.LSym, newprog obj.ProgAlloc) { q.To.Type = obj.TYPE_REG q.To.Reg = REGSP q.Spadj = +autosize + + q = c.ctxt.EndUnsafePoint(q, c.newprog, -1) } if c.cursym.Func.Text.From.Sym.Wrapper() && c.cursym.Func.Text.Mark&LEAF == 0 { |