From e2bde5cf9b1b4e56f1d2c8469006fb11f8a99739 Mon Sep 17 00:00:00 2001
From: Russ Cox <rsc@golang.org>
Date: Thu, 12 Aug 2010 23:26:54 -0700
Subject: [PATCH] runtime: fix another stack split bug

Makes godoc --http=:1234 not crash on linux/amd64.

R=r
CC=golang-dev
https://golang.org/cl/1975044
---
 src/pkg/runtime/proc.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/pkg/runtime/proc.c b/src/pkg/runtime/proc.c
index 2abb28307e3..3dbc48fd9bc 100644
--- a/src/pkg/runtime/proc.c
+++ b/src/pkg/runtime/proc.c
@@ -547,6 +547,9 @@ gosched(void)
 // Record that it's not using the cpu anymore.
 // This is called only from the go syscall library and cgocall,
 // not from the low-level system calls used by the runtime.
+// Entersyscall cannot split the stack: the gosave must
+// make g->sched refer to the caller's stack pointer.
+#pragma textflag 7
 void
 ·entersyscall(void)
 {