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| author | Jeff Dike <jdike@addtoit.com> | 2006-09-26 08:33:04 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-09-26 17:49:07 +0200 |
| commit | 4b84c69b5f6c08a540e3683f1360a6cdef2806c7 (patch) | |
| tree | 708f1e4cbc2771886aaeb8eadb3ae4d458bc8133 /arch/um/os-Linux/trap.c | |
| parent | [PATCH] uml: SIGIO cleanups (diff) | |
| download | linux-4b84c69b5f6c08a540e3683f1360a6cdef2806c7.tar.xz linux-4b84c69b5f6c08a540e3683f1360a6cdef2806c7.zip | |
[PATCH] uml: Move signal handlers to arch code
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>
Diffstat (limited to 'arch/um/os-Linux/trap.c')
0 files changed, 0 insertions, 0 deletions