From c91e24907b9b9689c0af5d46b73e712d70f6994c Mon Sep 17 00:00:00 2001
From: Ian Lance Taylor <ian@gcc.gnu.org>
Date: Fri, 10 Feb 2012 15:52:37 +0000
Subject: [PATCH] runtime: Save all registers on stack for GC scan.

From-SVN: r184098
---
 libgo/runtime/mgc0.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/libgo/runtime/mgc0.c b/libgo/runtime/mgc0.c
index bd634d533e9..73c399df239 100644
--- a/libgo/runtime/mgc0.c
+++ b/libgo/runtime/mgc0.c
@@ -936,6 +936,10 @@ runtime_gc(int32 force)
 	const byte *p;
 	bool extra;
 
+	// Make sure all registers are saved on stack so that
+	// scanstack sees them.
+	__builtin_unwind_init();
+
 	// The gc is turned off (via enablegc) until
 	// the bootstrap has completed.
 	// Also, malloc gets called in the guts