From 1cf0c3b3f272fafff0e90009f9cb310ea656a43d Mon Sep 17 00:00:00 2001
From: Ingo Weinhold <ingo_weinhold@gmx.de>
Date: Tue, 10 Jan 2006 00:49:31 +0000
Subject: [PATCH] Clear the back pointer in the root kernel stack frame, so
 stack traces will end there.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@15888 a95241bf-73f2-0310-859d-f6bbb57e9c96
---
 .../boot/platform/openfirmware/arch/ppc/arch_start_kernel.S   | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/system/boot/platform/openfirmware/arch/ppc/arch_start_kernel.S b/src/system/boot/platform/openfirmware/arch/ppc/arch_start_kernel.S
index 89400d2e57..c0c082231c 100644
--- a/src/system/boot/platform/openfirmware/arch/ppc/arch_start_kernel.S
+++ b/src/system/boot/platform/openfirmware/arch/ppc/arch_start_kernel.S
@@ -25,6 +25,10 @@ FUNCTION(arch_start_kernel):
 	// set up the kernel stack
 	subi	%r1, %r5, 16
 
+	// clear the pointer to the previous frame
+	li		%r0, 0
+	stw		%r0, 0(%r1)
+
 	// enter the kernel
 	mtlr	%r4
 	blrl