runtime: convert Stack to Go.
LGTM=khr
R=khr, josharian
CC=golang-codereviews
https://golang.org/cl/129510043
diff --git a/src/pkg/runtime/asm_386.s b/src/pkg/runtime/asm_386.s
index 741832b..198a468 100644
--- a/src/pkg/runtime/asm_386.s
+++ b/src/pkg/runtime/asm_386.s
@@ -860,6 +860,12 @@
MOVL sp+0(FP), AX
RET
+// func gogetcallersp(p unsafe.Pointer) uintptr
+TEXT runtime·gogetcallersp(SB),NOSPLIT,$0-8
+ MOVL p+0(FP),AX // addr of first arg
+ MOVL AX, ret+4(FP)
+ RET
+
// int64 runtime·cputicks(void), so really
// void runtime·cputicks(int64 *ticks)
TEXT runtime·cputicks(SB),NOSPLIT,$0-4
