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[PATCH] Initialize argument registers for 32bit signal handlers.
author
Andi Kleen
<ak@suse.de>
Tue, 26 Sep 2006 08:52:41 +0000
(10:52 +0200)
committer
Andi Kleen
<andi@basil.nowhere.org>
Tue, 26 Sep 2006 08:52:41 +0000
(10:52 +0200)
In case the user space was compiled with -mregparm=3
Following i386. Pointed out by Albert Cahalan
Signed-off-by: Andi Kleen <ak@suse.de>
arch/x86_64/ia32/ia32_signal.c
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diff --git
a/arch/x86_64/ia32/ia32_signal.c
b/arch/x86_64/ia32/ia32_signal.c
index
2d20f83
..
ced1501
100644
(file)
--- a/
arch/x86_64/ia32/ia32_signal.c
+++ b/
arch/x86_64/ia32/ia32_signal.c
@@
-478,6
+478,11
@@
int ia32_setup_frame(int sig, struct k_sigaction *ka,
regs->rsp = (unsigned long) frame;
regs->rip = (unsigned long) ka->sa.sa_handler;
+ /* Make -mregparm=3 work */
+ regs->rax = sig;
+ regs->rdx = 0;
+ regs->rcx = 0;
+
asm volatile("movl %0,%%ds" :: "r" (__USER32_DS));
asm volatile("movl %0,%%es" :: "r" (__USER32_DS));