1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (C) 2019 Arm Limited 4 * Original author: Dave Martin <Dave.Martin@arm.com> 5 */ 6 7 #include "system.h" 8 #include "signal.h" 9 10 int sigemptyset(sigset_t *s) 11 { 12 unsigned int i; 13 14 for (i = 0; i < _NSIG_WORDS; ++i) 15 s->sig[i] = 0; 16 17 return 0; 18 } 19 20 int sigaddset(sigset_t *s, int n) 21 { 22 if (n < 1 || n > _NSIG) 23 return -EINVAL; 24 25 s->sig[(n - 1) / _NSIG_BPW] |= 1UL << (n - 1) % _NSIG_BPW; 26 return 0; 27 } 28 29 int sigaction(int n, struct sigaction *sa, const struct sigaction *old) 30 { 31 return syscall(__NR_rt_sigaction, n, sa, old, sizeof(sa->sa_mask)); 32 } 33 34 int sigprocmask(int how, const sigset_t *mask, sigset_t *old) 35 { 36 return syscall(__NR_rt_sigprocmask, how, mask, old, sizeof(*mask)); 37 } 38