2 * Check decoding of signal 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>
43 k_signal(const kernel_ulong_t signum, const kernel_ulong_t handler)
45 return syscall(__NR_signal, signum, handler);
51 static const uintptr_t sig_ign = (uintptr_t) SIG_IGN;
52 static const uintptr_t sig_dfl = (uintptr_t) SIG_DFL;
53 static const kernel_ulong_t sigusr1 =
54 (kernel_ulong_t) 0xfacefeed00000000ULL | SIGUSR1;
55 static const struct sigaction act = { .sa_handler = SIG_DFL };
60 sigaddset(&mask, SIGUSR1);
61 if (sigprocmask(SIG_BLOCK, &mask, NULL))
62 perror_msg_and_fail("sigprocmask SIG_BLOCK");
64 if (sigaction(SIGUSR1, &act, NULL))
65 perror_msg_and_fail("sigaction");
67 rc = k_signal(sigusr1, sig_ign);
70 printf("signal(SIGUSR1, SIG_IGN) = %s\n", sprintrc(rc));
71 } else if (rc != (long) sig_dfl) {
72 error_msg_and_fail("signal(SIGUSR1, SIG_IGN) = %#lx\n", rc);
74 printf("signal(SIGUSR1, SIG_IGN) = %#lx (SIG_DFL)\n", rc);
77 * Raise and unblock SIGUSR1.
78 * If signal syscall failed to set SIGUSR1 handler to SIG_IGN,
79 * the process will be terminated by SIGUSR1.
82 if (sigprocmask(SIG_UNBLOCK, &mask, NULL))
83 perror_msg_and_fail("sigprocmask SIG_UNBLOCK");
85 if (sigprocmask(SIG_BLOCK, &mask, NULL))
86 perror_msg_and_fail("sigprocmask SIG_BLOCK");
89 rc = k_signal(SIGUSR1, sig_dfl);
92 printf("signal(SIGUSR1, SIG_DFL) = %s\n", sprintrc(rc));
93 } else if (rc != (long) sig_ign) {
94 error_msg_and_fail("signal(SIGUSR1, SIG_DFL) = %#lx\n", rc);
96 printf("signal(SIGUSR1, SIG_DFL) = %#lx (SIG_IGN)\n", rc);
99 const kernel_ulong_t addr = (kernel_ulong_t) 0xfacefeeddeadbeefULL;
100 rc = k_signal(SIGUSR1, addr);
103 printf("signal(SIGUSR1, %#llx) = %s\n",
104 (unsigned long long) addr, sprintrc(rc));
105 } else if (rc != (long) sig_dfl) {
106 error_msg_and_fail("signal(SIGUSR1, %#llx) = %#lx\n",
107 (unsigned long long) addr, rc);
109 printf("signal(SIGUSR1, %#llx) = %#lx (SIG_DFL)\n",
110 (unsigned long long) addr, rc);
113 rc = k_signal(SIGUSR1, sig_ign);
116 printf("signal(SIGUSR1, SIG_IGN) = %s\n", sprintrc(rc));
118 printf("signal(SIGUSR1, SIG_IGN) = %#lx\n", rc);
121 rc = k_signal(addr, sig_ign);
122 printf("signal(%d, SIG_IGN) = %s\n", (int) addr, sprintrc(rc));
124 puts("+++ exited with 0 +++");
130 SKIP_MAIN_UNDEFINED("__NR_signal")