From: Michal Simek <monstr@monstr.eu>
Date: Fri, 6 Aug 2010 08:42:30 +0000 (+0200)
Subject: microblaze: Clear return value in pt_regs
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=7d4320956f0f8aa2c36c23f209acc3e4c3ae52d6;p=GitHub%2Fmt8127%2Fandroid_kernel_alcatel_ttab.git

microblaze: Clear return value in pt_regs

Signal code uses r3 value which saved in restore_sigcontext to
rt_sigframe but it require to be zeroed. If is not zero rt_sigframe
contains wrong values.

Signed-off-by: Michal Simek <monstr@monstr.eu>
---

diff --git a/arch/microblaze/kernel/entry.S b/arch/microblaze/kernel/entry.S
index ab4f1e159308..8539c6c0e741 100644
--- a/arch/microblaze/kernel/entry.S
+++ b/arch/microblaze/kernel/entry.S
@@ -295,6 +295,8 @@ C_ENTRY(_user_exception):
 	/* addik	r1, r1, -STATE_SAVE_SIZE; */
 	addik r1, r1, THREAD_SIZE + CONFIG_KERNEL_BASE_ADDR - CONFIG_KERNEL_START - STATE_SAVE_SIZE;
 	SAVE_REGS
+	swi	r0, r1, PTO + PT_R3
+	swi	r0, r1, PTO + PT_R4
 
 	lwi	r11, r0, TOPHYS(PER_CPU(ENTRY_SP));
 	swi	r11, r1, PTO+PT_R1;		/* Store user SP.  */