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| author |   Jeff Dike <jdike@addtoit.com> | 2006-09-25 23:33:04 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@g5.osdl.org> | 2006-09-26 08:49:07 -0700 |
| commit | 4b84c69b5f6c08a540e3683f1360a6cdef2806c7 (patch) | |
| tree | 708f1e4cbc2771886aaeb8eadb3ae4d458bc8133 /arch/um/os-Linux/time.c | |
| parent | [PATCH] uml: SIGIO cleanups (diff) | |
| download | linux-dev-4b84c69b5f6c08a540e3683f1360a6cdef2806c7.tar.xz linux-dev-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 '')
| -rw-r--r-- | arch/um/os-Linux/time.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/um/os-Linux/time.c b/arch/um/os-Linux/time.c index 4ae73c0e5485..7f5ebbadca63 100644 --- a/arch/um/os-Linux/time.c +++ b/arch/um/os-Linux/time.c @@ -40,8 +40,8 @@ void disable_timer(void) printk("disnable_timer - setitimer failed, errno = %d\n", errno); /* If there are signals already queued, after unblocking ignore them */ - set_handler(SIGALRM, SIG_IGN, 0, -1); - set_handler(SIGVTALRM, SIG_IGN, 0, -1); + signal(SIGALRM, SIG_IGN); + signal(SIGVTALRM, SIG_IGN); } void switch_timers(int to_real) |