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- /*
- * Copyright (C) 2013 Synopsys, Inc. (www.synopsys.com)
- *
- * Licensed under the LGPL v2.1 or later, see the file COPYING.LIB in this tarball.
- */
- #include <errno.h>
- #include <signal.h>
- #include <string.h>
- #include <sys/syscall.h>
- #include <bits/kernel_sigaction.h>
- /*
- * Default sigretrun stub if user doesn't specify SA_RESTORER
- */
- extern void __default_rt_sa_restorer(void);
- #define SA_RESTORER 0x04000000
- /* If @act is not NULL, change the action for @sig to @act.
- If @oact is not NULL, put the old action for @sig in @oact. */
- int
- __libc_sigaction (int sig, const struct sigaction *act, struct sigaction *oact)
- {
- struct sigaction kact;
- /*
- * SA_RESTORER is only relevant for act != NULL case
- * (!act means caller only wants to know @oact)
- */
- if (act && !(act->sa_flags & SA_RESTORER)) {
- kact.sa_restorer = __default_rt_sa_restorer;
- kact.sa_flags = act->sa_flags | SA_RESTORER;
- kact.sa_handler = act->sa_handler;
- kact.sa_mask = act->sa_mask;
- act = &kact;
- }
- return INLINE_SYSCALL(rt_sigaction, 4,
- sig, act, oact, sizeof(act->sa_mask));
- }
- #ifndef LIBC_SIGACTION
- # ifndef __UCLIBC_HAS_THREADS__
- strong_alias(__libc_sigaction,sigaction)
- libc_hidden_def(sigaction)
- # else
- weak_alias(__libc_sigaction,sigaction)
- libc_hidden_weak(sigaction)
- # endif
- #endif
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