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Commit 536e3ee4 authored by Andi Kleen's avatar Andi Kleen Committed by Andi Kleen
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[PATCH] Initialize argument registers for 32bit signal handlers. 



In case the user space was compiled with -mregparm=3
Following i386. Pointed out by Albert Cahalan

Signed-off-by: default avatarAndi Kleen <ak@suse.de>
parent dd54a110

arch/x86_64/ia32/ia32_signal.c

+5 −0
Original line number Diff line number Diff line
@@ -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));