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microblaze: Fix sys_rt_sigreturn_wrapper

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Do not save return registers before rt_sigreturn is called.
_user_exception(syscall handler) already setup return address
that's why it is removed from rt_sigreturn_wrapper.

Signed-off-by: Michal Simek <monstr@monstr.eu>
This commit is contained in:
Michal Simek 2010-08-06 10:36:02 +02:00
parent 06d1973490
commit 791d0a169b
1 changed files with 1 additions and 7 deletions
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arch/microblaze/kernel/entry.S
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@ -458,14 +458,8 @@ C_ENTRY(sys_execve):
addik r8, r1, PTO; /* add user context as 4th arg */
C_ENTRY(sys_rt_sigreturn_wrapper):
swi r3, r1, PTO+PT_R3; /* restore saved r3, r4 registers */
swi r4, r1, PTO+PT_R4;
brlid r15, sys_rt_sigreturn /* Do real work */
brid sys_rt_sigreturn /* Do real work */
addik r5, r1, PTO; /* add user context as 1st arg */
lwi r3, r1, PTO+PT_R3; /* restore saved r3, r4 registers */
lwi r4, r1, PTO+PT_R4;
bri ret_from_trap /* fall through will not work here due to align */
nop;
/*
* HW EXCEPTION rutine start