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
41 struct 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
62 typedef struct set_sa struct_set_sa;
63
64 #ifdef MIPS
65
66 struct get_sa {
67 unsigned int flags;
68 unsigned long handler;
69 unsigned long mask[4];
70 };
71
72 typedef struct get_sa struct_get_sa;
73
74 #else
75
76 typedef struct set_sa struct_get_sa;
77
78 #endif
79
80 static long
k_sigaction(const kernel_ulong_t signum,const kernel_ulong_t new_act,const kernel_ulong_t old_act)81 k_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
88 /*
89 * See arch/sparc/kernel/sys_sparc_32.c:sys_sparc_sigaction
90 * and arch/sparc/kernel/sys_sparc32.c:compat_sys_sparc_sigaction
91 */
92 # define ADDR_INT ((unsigned int) -0xdefaced)
93 # define SIGNO_INT ((unsigned int) -SIGUSR1)
94 # define SIG_STR "-SIGUSR1"
95 #else
96 # define ADDR_INT ((unsigned int) 0xdefaced)
97 # define SIGNO_INT ((unsigned int) SIGUSR1)
98 # define SIG_STR "SIGUSR1"
99 #endif
100 static const kernel_ulong_t signo =
101 (kernel_ulong_t) 0xbadc0ded00000000ULL | SIGNO_INT;
102 static const kernel_ulong_t addr =
103 (kernel_ulong_t) 0xfacefeed00000000ULL | ADDR_INT;
104
105 int
main(void)106 main(void)
107 {
108 union {
109 sigset_t libc[1];
110 unsigned long old[1];
111 } mask;
112
113 TAIL_ALLOC_OBJECT_CONST_PTR(struct_set_sa, new_act);
114 TAIL_ALLOC_OBJECT_CONST_PTR(struct_get_sa, old_act);
115
116 if (k_sigaction(signo, 0, 0))
117 perror_msg_and_skip("sigaction");
118 puts("sigaction(" SIG_STR ", NULL, NULL) = 0");
119
120 k_sigaction(signo, 0, 0);
121 puts("sigaction(" SIG_STR ", NULL, NULL) = 0");
122
123 k_sigaction(signo, (uintptr_t) (new_act + 1), 0);
124 printf("sigaction(" SIG_STR ", %p, NULL) = -1 EFAULT (%m)\n",
125 new_act + 1);
126
127 k_sigaction(signo, (uintptr_t) new_act + 2, 0);
128 printf("sigaction(" SIG_STR ", %#lx, NULL) = -1 EFAULT (%m)\n",
129 (unsigned long) new_act + 2);
130
131 k_sigaction(signo, 0, (uintptr_t) (old_act + 1));
132 printf("sigaction(" SIG_STR ", NULL, %p) = -1 EFAULT (%m)\n",
133 old_act + 1);
134
135 k_sigaction(signo, 0, (uintptr_t) old_act + 2);
136 printf("sigaction(" SIG_STR ", NULL, %#lx) = -1 EFAULT (%m)\n",
137 (unsigned long) old_act + 2);
138
139 k_sigaction(addr, 0, 0);
140 printf("sigaction(%d, NULL, NULL) = -1 EINVAL (%m)\n", ADDR_INT);
141
142 memset(new_act, 0, sizeof(*new_act));
143
144 k_sigaction(signo, (uintptr_t) new_act, 0);
145 puts("sigaction(" SIG_STR ", {sa_handler=SIG_DFL, sa_mask=[]"
146 ", sa_flags=0}, NULL) = 0");
147
148 sigemptyset(mask.libc);
149 sigaddset(mask.libc, SIGHUP);
150 sigaddset(mask.libc, SIGINT);
151
152 new_act->handler = (uintptr_t) SIG_IGN;
153 memcpy(new_act->mask, mask.old, sizeof(mask.old));
154 new_act->flags = SA_SIGINFO;
155
156 k_sigaction(signo, (uintptr_t) new_act, (uintptr_t) old_act);
157 puts("sigaction(" SIG_STR ", {sa_handler=SIG_IGN, sa_mask=[HUP INT]"
158 ", sa_flags=SA_SIGINFO}, {sa_handler=SIG_DFL, sa_mask=[]"
159 ", sa_flags=0}) = 0");
160
161 sigemptyset(mask.libc);
162 sigaddset(mask.libc, SIGQUIT);
163 sigaddset(mask.libc, SIGTERM);
164
165 new_act->handler = (unsigned long) addr;
166 memcpy(new_act->mask, mask.old, sizeof(mask.old));
167 new_act->flags = SA_ONSTACK | SA_RESTART;
168
169 k_sigaction(signo, (uintptr_t) new_act, (uintptr_t) old_act);
170 printf("sigaction(" SIG_STR ", {sa_handler=%#lx, sa_mask=[QUIT TERM]"
171 ", sa_flags=SA_ONSTACK|SA_RESTART}, {sa_handler=SIG_IGN"
172 ", sa_mask=[HUP INT], sa_flags=SA_SIGINFO}) = 0\n",
173 new_act->handler);
174
175 memset(mask.old, -1, sizeof(mask.old));
176 sigdelset(mask.libc, SIGHUP);
177
178 memcpy(new_act->mask, mask.old, sizeof(mask.old));
179 #ifdef SA_RESTORER
180 new_act->flags = SA_RESTORER;
181 new_act->restorer = (unsigned long) 0xdeadfacecafef00dULL;
182 # define SA_RESTORER_FMT ", sa_flags=SA_RESTORER, sa_restorer=%#lx"
183 # define SA_RESTORER_ARGS , new_act->restorer
184 #else
185 new_act->flags = SA_NODEFER;
186 # define SA_RESTORER_FMT ", sa_flags=SA_NODEFER"
187 # define SA_RESTORER_ARGS
188 #endif
189
190 k_sigaction(signo, (uintptr_t) new_act, (uintptr_t) old_act);
191 printf("sigaction(" SIG_STR ", {sa_handler=%#lx, sa_mask=~[HUP]"
192 SA_RESTORER_FMT "}, {sa_handler=%#lx, sa_mask=[QUIT TERM]"
193 ", sa_flags=SA_ONSTACK|SA_RESTART}) = 0\n",
194 new_act->handler SA_RESTORER_ARGS,
195 new_act->handler);
196
197 puts("+++ exited with 0 +++");
198 return 0;
199 }
200
201 #else
202
203 SKIP_MAIN_UNDEFINED("__NR_sigaction")
204
205 #endif
206