2 * Check decoding of sigsuspend syscall.
4 * Copyright (c) 2017 Dmitry V. Levin <ldv@altlinux.org>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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31 #include <asm/unistd.h>
33 #ifdef __NR_sigsuspend
44 # define SIGNAL_MASK_BY_REF 1
46 # define SIGNAL_MASK_BY_REF 0
50 k_sigsuspend(const kernel_ulong_t arg1,
51 const kernel_ulong_t arg2,
52 const kernel_ulong_t arg3)
54 return syscall(__NR_sigsuspend, arg1, arg2, arg3);
58 static const char *sigtxt[] = {
74 unsigned long old_mask;
77 sigemptyset(&u.libc_mask);
78 sigaddset(&u.libc_mask, SIGUSR1);
79 sigaddset(&u.libc_mask, SIGUSR2);
80 if (sigprocmask(SIG_SETMASK, &u.libc_mask, NULL))
81 perror_msg_and_fail("sigprocmask");
83 const struct sigaction sa = { .sa_handler = handler };
84 if (sigaction(SIGUSR1, &sa, NULL) || sigaction(SIGUSR2, &sa, NULL))
85 perror_msg_and_fail("sigaction");
91 sigdelset(&u.libc_mask, SIGUSR1);
92 const unsigned long mask1 = u.old_mask;
95 sigdelset(&u.libc_mask, SIGUSR2);
96 const unsigned long mask2 = u.old_mask;
98 #if SIGNAL_MASK_BY_REF
99 k_sigsuspend((uintptr_t) &mask1, 0xdeadbeef, (uintptr_t) &mask2);
101 k_sigsuspend(mask1, 0xdeadbeef, mask2);
104 perror_msg_and_skip("sigsuspend");
106 printf("sigsuspend(~[%s]) = ? ERESTARTNOHAND"
107 " (To be restarted if no handler)\n", sigtxt[signo]);
109 puts("+++ exited with 0 +++");
115 SKIP_MAIN_UNDEFINED("__NR_sigsuspend")