1 /*
2 * Check decoding of sigsuspend syscall.
3 *
4 * Copyright (c) 2017 Dmitry V. Levin <ldv@altlinux.org>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. The name of the author may not be used to endorse or promote products
16 * derived from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29
30 #include "tests.h"
31 #include <asm/unistd.h>
32
33 #ifdef __NR_sigsuspend
34
35 # include <assert.h>
36 # include <errno.h>
37 # include <signal.h>
38 # include <stdio.h>
39 # include <stdint.h>
40 # include <string.h>
41 # include <unistd.h>
42
43 # ifdef MIPS
44 # define SIGNAL_MASK_BY_REF 1
45 # else
46 # define SIGNAL_MASK_BY_REF 0
47 # endif
48
49 static long
k_sigsuspend(const kernel_ulong_t arg1,const kernel_ulong_t arg2,const kernel_ulong_t arg3)50 k_sigsuspend(const kernel_ulong_t arg1,
51 const kernel_ulong_t arg2,
52 const kernel_ulong_t arg3)
53 {
54 return syscall(__NR_sigsuspend, arg1, arg2, arg3);
55 }
56
57 static int signo;
58 static const char *sigtxt[] = {
59 [SIGUSR1] = "USR1",
60 [SIGUSR2] = "USR2"
61 };
62
63 static void
handler(int i)64 handler(int i)
65 {
66 signo = i;
67 }
68
69 int
main(void)70 main(void)
71 {
72 union {
73 sigset_t libc_mask;
74 unsigned long old_mask;
75 } u;
76
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");
82
83 const struct sigaction sa = { .sa_handler = handler };
84 if (sigaction(SIGUSR1, &sa, NULL) || sigaction(SIGUSR2, &sa, NULL))
85 perror_msg_and_fail("sigaction");
86
87 raise(SIGUSR1);
88 raise(SIGUSR2);
89
90 u.old_mask = -1UL;
91 sigdelset(&u.libc_mask, SIGUSR1);
92 const unsigned long mask1 = u.old_mask;
93
94 u.old_mask = -1UL;
95 sigdelset(&u.libc_mask, SIGUSR2);
96 const unsigned long mask2 = u.old_mask;
97
98 #if SIGNAL_MASK_BY_REF
99 k_sigsuspend((uintptr_t) &mask1, 0xdeadbeef, (uintptr_t) &mask2);
100 #else
101 k_sigsuspend(mask1, 0xdeadbeef, mask2);
102 #endif
103 if (EINTR != errno)
104 perror_msg_and_skip("sigsuspend");
105
106 printf("sigsuspend(~[%s]) = ? ERESTARTNOHAND"
107 " (To be restarted if no handler)\n", sigtxt[signo]);
108
109 puts("+++ exited with 0 +++");
110 return 0;
111 }
112
113 #else
114
115 SKIP_MAIN_UNDEFINED("__NR_sigsuspend")
116
117 #endif
118