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4b84c69b5f
Have most signals go through an arch-provided handler which recovers the sigcontext and then calls a generic handler. This replaces the ARCH_GET_SIGCONTEXT macro, which was somewhat fragile. On x86_64, recovering %rdx (which holds the sigcontext pointer) must be the first thing that happens. sig_handler duly invokes that first, but there is no guarantee that I can see that instructions won't be reordered such that %rdx is used before that. Having the arch provide the handler seems much more robust. Some signals in some parts of UML require their own handlers - these places don't call set_handler any more. They call sigaction or signal themselves. Signed-off-by: Jeff Dike <jdike@addtoit.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
15 lines
286 B
C
15 lines
286 B
C
/*
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* Copyright (C) 2006 Jeff Dike (jdike@addtoit.com)
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* Licensed under the GPL
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*/
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#include <signal.h>
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extern void (*handlers[])(int sig, struct sigcontext *sc);
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void hard_handler(int sig)
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{
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struct sigcontext *sc = (struct sigcontext *) (&sig + 1);
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(*handlers[sig])(sig, sc);
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}
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