/* * Copyright (C) 2016 Andes Technology, Inc. * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball. */ #include <errno.h> #include <signal.h> #include <sys/syscall.h> #include <string.h> #include <bits/kernel_sigaction.h> #define SA_RESTORER 0x04000000 extern void __default_sa_restorer(void); int __libc_sigaction(int sig, const struct sigaction *act, struct sigaction *oact) { struct sigaction kact; if (act && !(act->sa_flags & SA_RESTORER)) { memcpy(&kact, act, sizeof(kact)); kact.sa_restorer = __default_sa_restorer; kact.sa_flags |= SA_RESTORER; act = &kact; } /* NB: kernel (as of 2.6.25) will return EINVAL * if sizeof(act->sa_mask) does not match kernel's sizeof(sigset_t) */ return __syscall_rt_sigaction(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