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