From: Franck Bui-Huu <vagabon.xyz@gmail.com>
Date: Fri, 18 Aug 2006 14:18:07 +0000 (+0200)
Subject: [MIPS] unwind_stack(): return ra if an exception occured at the first instruction
X-Git-Tag: v2.6.19-rc1~1013
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1fd6909802b837ed5510603846c0ce5938d296a1;p=linux-2.6

[MIPS] unwind_stack(): return ra if an exception occured at the first instruction

Signed-off-by: Franck Bui-Huu <vagabon.xyz@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
---

diff --git a/arch/mips/kernel/process.c b/arch/mips/kernel/process.c
index 951bf9ca3c..e7b0b385fb 100644
--- a/arch/mips/kernel/process.c
+++ b/arch/mips/kernel/process.c
@@ -465,8 +465,11 @@ unsigned long unwind_stack(struct task_struct *task, unsigned long *sp,
 
 	if (!kallsyms_lookup(pc, &size, &ofs, &modname, namebuf))
 		return 0;
-	if (ofs == 0)
-		return 0;
+	/*
+	 * Return ra if an exception occured at the first instruction
+	 */
+	if (unlikely(ofs == 0))
+		return ra;
 
 	info.func = (void *)(pc - ofs);
 	info.func_size = ofs;	/* analyze from start to ofs */