| /* |
| * Check decoding of sigsuspend syscall. |
| * |
| * Copyright (c) 2017 Dmitry V. Levin <ldv@altlinux.org> |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "tests.h" |
| #include <asm/unistd.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 |