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[PATCH] Initialize argument registers for 32bit signal handlers.

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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>
This commit is contained in:
Andi Kleen
2006-09-26 10:52:41 +02:00
committed by Andi Kleen
parent dd54a11004
commit 536e3ee4fe
1 changed files with 5 additions and 0 deletions
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5
arch/x86_64/ia32/ia32_signal.c
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@@ -478,6 +478,11 @@ int ia32_setup_frame(int sig, struct k_sigaction *ka,
regs->rsp = (unsigned long) frame; regs->rsp = (unsigned long) frame;
regs->rip = (unsigned long) ka->sa.sa_handler; 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,%%ds" :: "r" (__USER32_DS));
asm volatile("movl %0,%%es" :: "r" (__USER32_DS)); asm volatile("movl %0,%%es" :: "r" (__USER32_DS));