1/*
2 * Check decoding of sigaction 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_sigaction
34
35# include <signal.h>
36# include <stdint.h>
37# include <stdio.h>
38# include <string.h>
39# include <unistd.h>
40
41struct set_sa {
42#if defined MIPS
43	unsigned int flags;
44	unsigned long handler;
45	unsigned long mask[1];
46#elif defined ALPHA
47	unsigned long handler;
48	unsigned long mask[1];
49	unsigned int flags;
50#else
51	unsigned long handler;
52	unsigned long mask[1];
53	unsigned long flags;
54	unsigned long restorer;
55#endif
56}
57#ifdef ALPHA
58	ATTRIBUTE_PACKED
59#endif
60;
61
62typedef struct set_sa struct_set_sa;
63
64#ifdef MIPS
65
66struct get_sa {
67	unsigned int flags;
68	unsigned long handler;
69	unsigned long mask[4];
70};
71
72typedef struct get_sa struct_get_sa;
73
74#else
75
76typedef struct set_sa struct_get_sa;
77
78#endif
79
80static long
81k_sigaction(const kernel_ulong_t signum, const kernel_ulong_t new_act,
82	    const kernel_ulong_t old_act)
83{
84	return syscall(__NR_sigaction, signum, new_act, old_act);
85}
86
87#if defined SPARC || defined SPARC64
88static const kernel_ulong_t signo =
89	(kernel_ulong_t) 0xbadc0ded00000000ULL | (unsigned int) -SIGUSR1;
90# define SIG_STR "-SIGUSR1"
91#else
92static const kernel_ulong_t signo =
93	(kernel_ulong_t) 0xbadc0ded00000000ULL | SIGUSR1;
94# define SIG_STR "SIGUSR1"
95#endif
96
97int
98main(void)
99{
100	static const kernel_ulong_t addr =
101		(kernel_ulong_t) 0xfacefeed0defacedULL;
102	union {
103		sigset_t libc[1];
104		unsigned long old[1];
105	} mask;
106
107	TAIL_ALLOC_OBJECT_CONST_PTR(struct_set_sa, new_act);
108	TAIL_ALLOC_OBJECT_CONST_PTR(struct_get_sa, old_act);
109
110	if (k_sigaction(signo, 0, 0))
111		perror_msg_and_skip("sigaction");
112	puts("sigaction(" SIG_STR ", NULL, NULL) = 0");
113
114	k_sigaction(signo, 0, 0);
115	puts("sigaction(" SIG_STR ", NULL, NULL) = 0");
116
117	k_sigaction(signo, (uintptr_t) (new_act + 1), 0);
118	printf("sigaction(" SIG_STR ", %p, NULL) = -1 EFAULT (%m)\n",
119	       new_act + 1);
120
121	k_sigaction(signo, (uintptr_t) new_act + 2, 0);
122	printf("sigaction(" SIG_STR ", %#lx, NULL) = -1 EFAULT (%m)\n",
123	       (unsigned long) new_act + 2);
124
125	k_sigaction(signo, 0, (uintptr_t) (old_act + 1));
126	printf("sigaction(" SIG_STR ", NULL, %p) = -1 EFAULT (%m)\n",
127	       old_act + 1);
128
129	k_sigaction(signo, 0, (uintptr_t) old_act + 2);
130	printf("sigaction(" SIG_STR ", NULL, %#lx) = -1 EFAULT (%m)\n",
131	       (unsigned long) old_act + 2);
132
133	k_sigaction(addr, 0, 0);
134	printf("sigaction(%d, NULL, NULL) = -1 EINVAL (%m)\n", (int) addr);
135
136	memset(new_act, 0, sizeof(*new_act));
137
138	k_sigaction(signo, (uintptr_t) new_act, 0);
139	puts("sigaction(" SIG_STR ", {sa_handler=SIG_DFL, sa_mask=[]"
140	     ", sa_flags=0}, NULL) = 0");
141
142	sigemptyset(mask.libc);
143	sigaddset(mask.libc, SIGHUP);
144	sigaddset(mask.libc, SIGINT);
145
146	new_act->handler = (uintptr_t) SIG_IGN;
147	memcpy(new_act->mask, mask.old, sizeof(mask.old));
148	new_act->flags = SA_SIGINFO;
149
150	k_sigaction(signo, (uintptr_t) new_act, (uintptr_t) old_act);
151	puts("sigaction(" SIG_STR ", {sa_handler=SIG_IGN, sa_mask=[HUP INT]"
152	     ", sa_flags=SA_SIGINFO}, {sa_handler=SIG_DFL, sa_mask=[]"
153	     ", sa_flags=0}) = 0");
154
155	sigemptyset(mask.libc);
156	sigaddset(mask.libc, SIGQUIT);
157	sigaddset(mask.libc, SIGTERM);
158
159	new_act->handler = (unsigned long) addr;
160	memcpy(new_act->mask, mask.old, sizeof(mask.old));
161	new_act->flags = SA_ONSTACK | SA_RESTART;
162
163	k_sigaction(signo, (uintptr_t) new_act, (uintptr_t) old_act);
164	printf("sigaction(" SIG_STR ", {sa_handler=%#lx, sa_mask=[QUIT TERM]"
165	       ", sa_flags=SA_ONSTACK|SA_RESTART}, {sa_handler=SIG_IGN"
166	       ", sa_mask=[HUP INT], sa_flags=SA_SIGINFO}) = 0\n",
167	       new_act->handler);
168
169	memset(mask.old, -1, sizeof(mask.old));
170	sigdelset(mask.libc, SIGHUP);
171
172	memcpy(new_act->mask, mask.old, sizeof(mask.old));
173#ifdef SA_RESTORER
174	new_act->flags = SA_RESTORER;
175	new_act->restorer = (unsigned long) 0xdeadfacecafef00dULL;
176# define SA_RESTORER_FMT ", sa_flags=SA_RESTORER, sa_restorer=%#lx"
177# define SA_RESTORER_ARGS , new_act->restorer
178#else
179	new_act->flags = SA_NODEFER;
180# define SA_RESTORER_FMT ", sa_flags=SA_NODEFER"
181# define SA_RESTORER_ARGS
182#endif
183
184	k_sigaction(signo, (uintptr_t) new_act, (uintptr_t) old_act);
185	printf("sigaction(" SIG_STR ", {sa_handler=%#lx, sa_mask=~[HUP]"
186	       SA_RESTORER_FMT "}, {sa_handler=%#lx, sa_mask=[QUIT TERM]"
187	       ", sa_flags=SA_ONSTACK|SA_RESTART}) = 0\n",
188	       new_act->handler SA_RESTORER_ARGS,
189	       new_act->handler);
190
191	puts("+++ exited with 0 +++");
192	return 0;
193}
194
195#else
196
197SKIP_MAIN_UNDEFINED("__NR_sigaction")
198
199#endif
200