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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>
This commit is contained in:
Michal Simek 2010-08-06 10:42:30 +02:00
parent 791d0a169b
commit 7d4320956f
1 changed files with 2 additions and 0 deletions
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2
arch/microblaze/kernel/entry.S
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@ -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. */