From 0b44a0315b47dd8eced9f3b7f31580cf14bbfc01 Mon Sep 17 00:00:00 2001 From: Rich Felker Date: Sat, 12 Feb 2011 00:22:29 -0500 Subject: initial check-in, version 0.5.0 --- src/signal/sigaction.c | 48 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 48 insertions(+) create mode 100644 src/signal/sigaction.c (limited to 'src/signal/sigaction.c') diff --git a/src/signal/sigaction.c b/src/signal/sigaction.c new file mode 100644 index 00000000..4acd1730 --- /dev/null +++ b/src/signal/sigaction.c @@ -0,0 +1,48 @@ +#include +#include +#include +#include "syscall.h" +#include "pthread_impl.h" + +static void restorer() +{ + syscall0(__NR_rt_sigreturn); +} + +int __libc_sigaction(int sig, const struct sigaction *sa, struct sigaction *old) +{ + struct { + void *handler; + unsigned long flags; + void (*restorer)(void); + sigset_t mask; + } ksa, kold; + long pksa=0, pkold=0; + if (sa) { + ksa.handler = sa->sa_handler; + ksa.flags = sa->sa_flags; + ksa.restorer = restorer; + ksa.mask = sa->sa_mask; + pksa = (long)&ksa; + } + if (old) pkold = (long)&kold; + if (syscall4(__NR_rt_sigaction, sig, pksa, pkold, 8)) + return -1; + if (old) { + old->sa_handler = kold.handler; + old->sa_flags = kold.flags; + old->sa_mask = kold.mask; + } + return 0; +} + +int __sigaction(int sig, const struct sigaction *sa, struct sigaction *old) +{ + if (sig == SIGCANCEL || sig == SIGSYSCALL) { + errno = EINVAL; + return -1; + } + return __libc_sigaction(sig, sa, old); +} + +weak_alias(__sigaction, sigaction); -- cgit v1.2.1