linux-kernel - [PATCH] [11/19] i386: Fix fake return address

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Message-Id: <20061021165131.4FDD813C4D@wotan.suse.de>
Date:	Sat, 21 Oct 2006 18:51:31 +0200 (CEST)
From:	Andi Kleen <ak@...e.de>
To:	Jeremy Fitzhardinge <jeremy@...p.org>, Andi Kleen <ak@....de>,
	Andrew Morton <akpm@...l.org>, patches@...-64.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] [11/19] i386: Fix fake return address


From: Jeremy Fitzhardinge <jeremy@...p.org>
The fake return address was being set to __KERNEL_PDA, rather than 0.
Push it earlier while %eax still equals 0.

Signed-off-by: Jeremy Fitzhardinge <jeremy@...source.com>
Signed-off-by: Andi Kleen <ak@...e.de>
Cc: Andi Kleen <ak@....de>
Cc: Andrew Morton <akpm@...l.org>

---
 arch/i386/kernel/head.S |    2 +-
 1 files changed, 1 insertion(+), 1 deletion(-)

Index: linux/arch/i386/kernel/head.S
===================================================================
--- linux.orig/arch/i386/kernel/head.S
+++ linux/arch/i386/kernel/head.S
@@ -317,7 +317,7 @@ is386:	movl $2,%ecx		# set MP
 	movl %eax,%gs
 	lldt %ax
 	cld			# gcc2 wants the direction flag cleared at all times
-	pushl %eax		# fake return address
+	pushl $0		# fake return address for unwinder
 #ifdef CONFIG_SMP
 	movb ready, %cl
 	movb $1, ready
-
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