From 8e3de538eec95b57a5b86038988451c38ba83f7e Mon Sep 17 00:00:00 2001 From: Albert Cahalan Date: Thu, 7 Dec 2006 02:14:06 +0100 Subject: [PATCH] [PATCH] x86-64: Support -mregparm arguments for signals with SA_SIGINFO in compat mode The recent change to make x86_64 support i386 binaries compiled with -mregparm=3 only covered signal handlers without SA_SIGINFO. (the 3-arg "real-time" ones) To be compatible with i386, both types should be supported. Signed-off-by: Albert Cahalan Signed-off-by: Andi Kleen --- arch/x86_64/ia32/ia32_signal.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/arch/x86_64/ia32/ia32_signal.c b/arch/x86_64/ia32/ia32_signal.c index 0e0a266d976..ff499ef2a1b 100644 --- a/arch/x86_64/ia32/ia32_signal.c +++ b/arch/x86_64/ia32/ia32_signal.c @@ -584,6 +584,11 @@ int ia32_setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info, regs->rdx = (unsigned long) &frame->info; regs->rcx = (unsigned long) &frame->uc; + /* Make -mregparm=3 work */ + regs->rax = sig; + regs->rdx = (unsigned long) &frame->info; + regs->rcx = (unsigned long) &frame->uc; + asm volatile("movl %0,%%ds" :: "r" (__USER32_DS)); asm volatile("movl %0,%%es" :: "r" (__USER32_DS)); -- 2.32.0.93.g670b81a890