From: Albert Cahalan Date: Mon, 30 Oct 2006 03:26:17 +0000 (-0500) Subject: [PATCH] fix i386 regparm=3 RT signal handlers on x86_64 X-Git-Tag: v2.6.19-rc4~4 X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=a7aacdf9ea45bf6139cfd750e558a3dcbc6f16c3;p=linux-2.6-omap-h63xx.git [PATCH] fix i386 regparm=3 RT signal handlers on x86_64 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) This is useful for klibc at least. Signed-off-by: Albert Cahalan Signed-off-by: Linus Torvalds --- diff --git a/arch/x86_64/ia32/ia32_signal.c b/arch/x86_64/ia32/ia32_signal.c index a6ba9951e86..0e0a266d976 100644 --- a/arch/x86_64/ia32/ia32_signal.c +++ b/arch/x86_64/ia32/ia32_signal.c @@ -579,6 +579,11 @@ int ia32_setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info, regs->rsp = (unsigned long) frame; regs->rip = (unsigned long) ka->sa.sa_handler; + /* 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));