/*
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* Check decoding of sigsuspend syscall.
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*
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* Copyright (c) 2017 Dmitry V. Levin <ldv@altlinux.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "tests.h"
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#include <asm/unistd.h>
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#ifdef __NR_sigsuspend
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# include <assert.h>
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# include <errno.h>
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# include <signal.h>
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# include <stdio.h>
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# include <stdint.h>
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# include <string.h>
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# include <unistd.h>
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# ifdef MIPS
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# define SIGNAL_MASK_BY_REF 1
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# else
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# define SIGNAL_MASK_BY_REF 0
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# endif
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static long
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k_sigsuspend(const kernel_ulong_t arg1,
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const kernel_ulong_t arg2,
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const kernel_ulong_t arg3)
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{
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return syscall(__NR_sigsuspend, arg1, arg2, arg3);
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}
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static int signo;
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static const char *sigtxt[] = {
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[SIGUSR1] = "USR1",
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[SIGUSR2] = "USR2"
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};
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static void
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handler(int i)
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{
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signo = i;
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}
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int
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main(void)
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{
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union {
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sigset_t libc_mask;
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unsigned long old_mask;
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} u;
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sigemptyset(&u.libc_mask);
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sigaddset(&u.libc_mask, SIGUSR1);
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sigaddset(&u.libc_mask, SIGUSR2);
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if (sigprocmask(SIG_SETMASK, &u.libc_mask, NULL))
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perror_msg_and_fail("sigprocmask");
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const struct sigaction sa = { .sa_handler = handler };
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if (sigaction(SIGUSR1, &sa, NULL) || sigaction(SIGUSR2, &sa, NULL))
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perror_msg_and_fail("sigaction");
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raise(SIGUSR1);
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raise(SIGUSR2);
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u.old_mask = -1UL;
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sigdelset(&u.libc_mask, SIGUSR1);
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const unsigned long mask1 = u.old_mask;
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u.old_mask = -1UL;
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sigdelset(&u.libc_mask, SIGUSR2);
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const unsigned long mask2 = u.old_mask;
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#if SIGNAL_MASK_BY_REF
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k_sigsuspend((uintptr_t) &mask1, 0xdeadbeef, (uintptr_t) &mask2);
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#else
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k_sigsuspend(mask1, 0xdeadbeef, mask2);
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#endif
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if (EINTR != errno)
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perror_msg_and_skip("sigsuspend");
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printf("sigsuspend(~[%s]) = ? ERESTARTNOHAND"
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" (To be restarted if no handler)\n", sigtxt[signo]);
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puts("+++ exited with 0 +++");
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return 0;
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}
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#else
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SKIP_MAIN_UNDEFINED("__NR_sigsuspend")
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#endif
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