linux-kernel - [PATCH] SA_SIGINFO was forgotten

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Date:	Tue, 31 Oct 2006 13:09:26 -0500
From:	"Albert Cahalan" <acahalan@...il.com>
To:	"Andrew Morton" <akpm@...l.org>, linux-kernel@...r.kernel.org,
	"Linus Torvalds" <torvalds@...l.org>, "Andi Kleen" <ak@...e.de>
Subject: [PATCH] SA_SIGINFO was forgotten

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 <acahalan@...il.com>

diff -Naurd old/arch/x86_64/ia32/ia32_signal.c
new/arch/x86_64/ia32/ia32_signal.c
--- old/arch/x86_64/ia32/ia32_signal.c  2006-10-29 20:36:01.000000000 -0500
+++ new/arch/x86_64/ia32/ia32_signal.c  2006-10-29 21:58:01.000000000 -0500
@@ -579,6 +579,11 @@
       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));
-
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