Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
[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>
authored by
Albert Cahalan
and committed by
Linus Torvalds
a7aacdf9
202dd450
+5
+5
arch/x86_64/ia32/ia32_signal.c
+5
arch/x86_64/ia32/ia32_signal.c
···
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regs->rsp = (unsigned long) frame;
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regs->rip = (unsigned long) ka->sa.sa_handler;
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+
/* Make -mregparm=3 work */
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regs->rax = sig;
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regs->rdx = (unsigned long) &frame->info;
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regs->rcx = (unsigned long) &frame->uc;
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+
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asm volatile("movl %0,%%ds" :: "r" (__USER32_DS));
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asm volatile("movl %0,%%es" :: "r" (__USER32_DS));
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