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/*
* Check decoding of sigsuspend syscall.
*
* Copyright (c) 2017-2018 Dmitry V. Levin <ldv@strace.io>
* Copyright (c) 2017-2021 The strace developers.
* All rights reserved.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "tests.h"
#include "scno.h"
#ifdef __NR_sigsuspend
# include <assert.h>
# include <errno.h>
# include <signal.h>
# include <stdio.h>
# include <stdint.h>
# include <string.h>
# include <unistd.h>
# ifdef MIPS
# define SIGNAL_MASK_BY_REF 1
# else
# define SIGNAL_MASK_BY_REF 0
# endif
static long
k_sigsuspend(const kernel_ulong_t arg1,
const kernel_ulong_t arg2,
const kernel_ulong_t arg3)
{
return syscall(__NR_sigsuspend, arg1, arg2, arg3);
}
static int signo;
static const char *sigtxt[] = {
[SIGUSR1] = "USR1",
[SIGUSR2] = "USR2"
};
static void
handler(int i)
{
signo = i;
}
int
main(void)
{
union {
sigset_t libc_mask;
unsigned long old_mask;
} u;
sigemptyset(&u.libc_mask);
sigaddset(&u.libc_mask, SIGUSR1);
sigaddset(&u.libc_mask, SIGUSR2);
if (sigprocmask(SIG_SETMASK, &u.libc_mask, NULL))
perror_msg_and_fail("sigprocmask");
const struct sigaction sa = { .sa_handler = handler };
if (sigaction(SIGUSR1, &sa, NULL) || sigaction(SIGUSR2, &sa, NULL))
perror_msg_and_fail("sigaction");
raise(SIGUSR1);
raise(SIGUSR2);
u.old_mask = -1UL;
sigdelset(&u.libc_mask, SIGUSR1);
const unsigned long mask1 = u.old_mask;
u.old_mask = -1UL;
sigdelset(&u.libc_mask, SIGUSR2);
const unsigned long mask2 = u.old_mask;
# if SIGNAL_MASK_BY_REF
k_sigsuspend((uintptr_t) &mask1, 0xdeadbeef, (uintptr_t) &mask2);
# else
k_sigsuspend(mask1, 0xdeadbeef, mask2);
# endif
if (EINTR != errno)
perror_msg_and_skip("sigsuspend");
printf("sigsuspend(~[%s]) = ? ERESTARTNOHAND"
" (To be restarted if no handler)\n", sigtxt[signo]);
puts("+++ exited with 0 +++");
return 0;
}
#else
SKIP_MAIN_UNDEFINED("__NR_sigsuspend")
#endif
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