signal.c

// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (C) 2019  Arm Limited
 * Original author: Dave Martin <[email protected]>
 */

#include "system.h"
#include "signal.h"

int sigemptyset(sigset_t *s)
{
	unsigned int i;

	for (i = 0; i < _NSIG_WORDS; ++i)
		s->sig[i] = 0;

	return 0;
}

int sigaddset(sigset_t *s, int n)
{
	if (n < 1 || n > _NSIG)
		return -EINVAL;

	s->sig[(n - 1) / _NSIG_BPW] |= 1UL << (n - 1) % _NSIG_BPW;
	return 0;
}

int sigaction(int n, struct sigaction *sa, const struct sigaction *old)
{
	return syscall(__NR_rt_sigaction, n, sa, old, sizeof(sa->sa_mask));
}

int sigprocmask(int how, const sigset_t *mask, sigset_t *old)
{
	return syscall(__NR_rt_sigprocmask, how, mask, old, sizeof(*mask));
}