1 /*
2  * Copyright (c) 2015-2017 Dmitry V. Levin <ldv@altlinux.org>
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in the
12  *    documentation and/or other materials provided with the distribution.
13  * 3. The name of the author may not be used to endorse or promote products
14  *    derived from this software without specific prior written permission.
15  *
16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26  */
27 
28 #include "tests.h"
29 #include <asm/unistd.h>
30 
31 #if defined __powerpc64__ \
32  || (defined __sparc__ && defined __arch64__)
33 /* Old sigreturn is defined but not implemented in the kernel. */
34 # undef __NR_sigreturn
35 #endif
36 
37 #ifdef __NR_sigreturn
38 
39 # include <signal.h>
40 # include <stdio.h>
41 # include <stdlib.h>
42 
43 # ifdef ASM_SIGRTMIN
44 #  define RT_0 ASM_SIGRTMIN
45 # else
46 /* Linux kernel >= 3.18 defines SIGRTMIN to 32 on all architectures. */
47 #  define RT_0 32
48 # endif
49 
50 static void
51 handler(int sig)
52 {
53 }
54 
55 int
56 main(void)
57 {
58 	static sigset_t set;
59 	sigemptyset(&set);
60 	sigaddset(&set, SIGINT);
61 	sigaddset(&set, SIGUSR2);
62 	sigaddset(&set, SIGCHLD);
63 	sigaddset(&set, RT_0 +  3);
64 	sigaddset(&set, RT_0 +  4);
65 	sigaddset(&set, RT_0 +  5);
66 	sigaddset(&set, RT_0 + 26);
67 	sigaddset(&set, RT_0 + 27);
68 	if (sigprocmask(SIG_SETMASK, &set, NULL))
69 		perror_msg_and_fail("sigprocmask");
70 	sigemptyset(&set);
71 
72 	/* This should result to old sigreturn. */
73 	if (signal(SIGUSR1, handler) == SIG_ERR)
74 		perror_msg_and_fail("sigaction");
75 
76 	if (raise(SIGUSR1))
77 		perror_msg_and_fail("raise");
78 
79 	static const char *const sigs =
80 		(SIGUSR2 < SIGCHLD) ? "INT USR2 CHLD" : "INT CHLD USR2";
81 	static const char *const rt_sigs = "RT_3 RT_4 RT_5 RT_26 RT_27";
82 	printf("sigreturn({mask=[%s %s]}) = 0\n", sigs, rt_sigs);
83 
84 	puts("+++ exited with 0 +++");
85 	return 0;
86 }
87 
88 #else
89 
90 SKIP_MAIN_UNDEFINED("__NR_sigreturn")
91 
92 #endif
93