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authorAlbert Cahalan <acahalan@gmail.com>2006-10-29 22:26:17 -0500
committerLinus Torvalds <torvalds@g5.osdl.org>2006-10-30 12:12:21 -0800
commita7aacdf9ea45bf6139cfd750e558a3dcbc6f16c3 (patch)
treef39534927b66496a07e4804c8de277d182a30ba9 /arch/x86_64/ia32
parent202dd450246cd658e298a86dddca5592fcb898cd (diff)
[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 <acahalan@gmail.com> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/x86_64/ia32')
-rw-r--r--arch/x86_64/ia32/ia32_signal.c5
1 files changed, 5 insertions, 0 deletions
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));