From: Albert Cahalan <acahalan@gmail.com>
To: Albert Cahalan <acahalan@gmail.com>,
Andrew Morton <akpm@osdl.org>,
linux-kernel@vger.kernel.org, Linus Torvalds <torvalds@osdl.org>,
Andi Kleen <ak@suse.de>
Cc: Albert Cahalan <acahalan@gmail.com>
Subject: [PATCH] i386 regparm=3 RT signal handlers on x86_64
Date: Sun, 29 Oct 2006 22:26:17 -0500 [thread overview]
Message-ID: <20061030032617.9875.86052.sendpatchset@cube> (raw)
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 <acahalan@gmail.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));
reply other threads:[~2006-10-30 3:23 UTC|newest]
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