1 /*
2 * Copyright (c) 1991, 1992 Paul Kranenburg <pk@cs.few.eur.nl>
3 * Copyright (c) 1993 Branko Lankester <branko@hacktic.nl>
4 * Copyright (c) 1993-1996 Rick Sladkey <jrs@world.std.com>
5 * Copyright (c) 1996-1999 Wichert Akkerman <wichert@cistron.nl>
6 * Copyright (c) 2001 John Hughes <john@Calva.COM>
7 * Copyright (c) 2013 Denys Vlasenko <vda.linux@googlemail.com>
8 * Copyright (c) 2011-2015 Dmitry V. Levin <ldv@altlinux.org>
9 * Copyright (c) 2015 Elvira Khabirova <lineprinter0@gmail.com>
10 * Copyright (c) 2015-2017 The strace developers.
11 * All rights reserved.
12 *
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
15 * are met:
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. The name of the author may not be used to endorse or promote products
22 * derived from this software without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
25 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
26 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
27 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
28 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
29 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
30 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
31 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
32 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
33 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 */
35
36 #include "defs.h"
37
38 #include DEF_MPERS_TYPE(siginfo_t)
39
40 #include <signal.h>
41 #include <linux/audit.h>
42
43 #include MPERS_DEFS
44
45 #ifndef IN_MPERS
46 #include "printsiginfo.h"
47 #endif
48
49 #include "xlat/audit_arch.h"
50 #include "xlat/sigbus_codes.h"
51 #include "xlat/sigchld_codes.h"
52 #include "xlat/sigfpe_codes.h"
53 #include "xlat/sigill_codes.h"
54 #include "xlat/siginfo_codes.h"
55 #include "xlat/sigpoll_codes.h"
56 #include "xlat/sigprof_codes.h"
57 #include "xlat/sigsegv_codes.h"
58 #include "xlat/sigsys_codes.h"
59 #include "xlat/sigtrap_codes.h"
60
61 #ifdef SIGEMT
62 # include "xlat/sigemt_codes.h"
63 #endif
64
65 #ifndef SI_FROMUSER
66 # define SI_FROMUSER(sip) ((sip)->si_code <= 0)
67 #endif
68
69 static void
printsigsource(const siginfo_t * sip)70 printsigsource(const siginfo_t *sip)
71 {
72 tprintf(", si_pid=%u, si_uid=%u",
73 (unsigned int) sip->si_pid,
74 (unsigned int) sip->si_uid);
75 }
76
77 static void
printsigval(const siginfo_t * sip)78 printsigval(const siginfo_t *sip)
79 {
80 tprintf(", si_value={int=%d, ptr=", sip->si_int);
81 printaddr(ptr_to_kulong(sip->si_ptr));
82 tprints("}");
83 }
84
85 static void
print_si_code(int si_signo,unsigned int si_code)86 print_si_code(int si_signo, unsigned int si_code)
87 {
88 const char *code = xlookup(siginfo_codes, si_code);
89
90 if (!code) {
91 switch (si_signo) {
92 case SIGTRAP:
93 code = xlookup(sigtrap_codes, si_code);
94 break;
95 case SIGCHLD:
96 code = xlookup(sigchld_codes, si_code);
97 break;
98 case SIGPOLL:
99 code = xlookup(sigpoll_codes, si_code);
100 break;
101 case SIGPROF:
102 code = xlookup(sigprof_codes, si_code);
103 break;
104 case SIGILL:
105 code = xlookup(sigill_codes, si_code);
106 break;
107 #ifdef SIGEMT
108 case SIGEMT:
109 code = xlookup(sigemt_codes, si_code);
110 break;
111 #endif
112 case SIGFPE:
113 code = xlookup(sigfpe_codes, si_code);
114 break;
115 case SIGSEGV:
116 code = xlookup(sigsegv_codes, si_code);
117 break;
118 case SIGBUS:
119 code = xlookup(sigbus_codes, si_code);
120 break;
121 case SIGSYS:
122 code = xlookup(sigsys_codes, si_code);
123 break;
124 }
125 }
126
127 if (code)
128 tprints(code);
129 else
130 tprintf("%#x", si_code);
131 }
132
133 static void
print_si_info(const siginfo_t * sip)134 print_si_info(const siginfo_t *sip)
135 {
136 if (sip->si_errno) {
137 tprints(", si_errno=");
138 if ((unsigned) sip->si_errno < nerrnos
139 && errnoent[sip->si_errno])
140 tprints(errnoent[sip->si_errno]);
141 else
142 tprintf("%d", sip->si_errno);
143 }
144
145 if (SI_FROMUSER(sip)) {
146 switch (sip->si_code) {
147 case SI_USER:
148 printsigsource(sip);
149 break;
150 case SI_TKILL:
151 printsigsource(sip);
152 break;
153 #if defined HAVE_SIGINFO_T_SI_TIMERID && defined HAVE_SIGINFO_T_SI_OVERRUN
154 case SI_TIMER:
155 tprintf(", si_timerid=%#x, si_overrun=%d",
156 sip->si_timerid, sip->si_overrun);
157 printsigval(sip);
158 break;
159 #endif
160 default:
161 printsigsource(sip);
162 if (sip->si_ptr)
163 printsigval(sip);
164 break;
165 }
166 } else {
167 switch (sip->si_signo) {
168 case SIGCHLD:
169 printsigsource(sip);
170 tprints(", si_status=");
171 if (sip->si_code == CLD_EXITED)
172 tprintf("%d", sip->si_status);
173 else
174 printsignal(sip->si_status);
175 tprintf(", si_utime=%llu, si_stime=%llu",
176 zero_extend_signed_to_ull(sip->si_utime),
177 zero_extend_signed_to_ull(sip->si_stime));
178 break;
179 case SIGILL: case SIGFPE:
180 case SIGSEGV: case SIGBUS:
181 tprints(", si_addr=");
182 printaddr(ptr_to_kulong(sip->si_addr));
183 break;
184 case SIGPOLL:
185 switch (sip->si_code) {
186 case POLL_IN: case POLL_OUT: case POLL_MSG:
187 tprintf(", si_band=%ld",
188 (long) sip->si_band);
189 break;
190 }
191 break;
192 #ifdef HAVE_SIGINFO_T_SI_SYSCALL
193 case SIGSYS: {
194 const char *scname =
195 syscall_name((unsigned) sip->si_syscall);
196
197 tprints(", si_call_addr=");
198 printaddr(ptr_to_kulong(sip->si_call_addr));
199 tprints(", si_syscall=");
200 if (scname)
201 tprintf("__NR_%s", scname);
202 else
203 tprintf("%u", (unsigned) sip->si_syscall);
204 tprints(", si_arch=");
205 printxval(audit_arch, sip->si_arch, "AUDIT_ARCH_???");
206 break;
207 }
208 #endif
209 default:
210 if (sip->si_pid || sip->si_uid)
211 printsigsource(sip);
212 if (sip->si_ptr)
213 printsigval(sip);
214 }
215 }
216 }
217
218 #ifdef IN_MPERS
219 static
220 #endif
221 void
printsiginfo(const siginfo_t * sip)222 printsiginfo(const siginfo_t *sip)
223 {
224 if (sip->si_signo == 0) {
225 tprints("{}");
226 return;
227 }
228 tprints("{si_signo=");
229 printsignal(sip->si_signo);
230
231 tprints(", si_code=");
232 print_si_code(sip->si_signo, sip->si_code);
233
234 #ifdef SI_NOINFO
235 if (sip->si_code != SI_NOINFO)
236 #endif
237 print_si_info(sip);
238
239 tprints("}");
240 }
241
MPERS_PRINTER_DECL(void,printsiginfo_at,struct tcb * const tcp,const kernel_ulong_t addr)242 MPERS_PRINTER_DECL(void, printsiginfo_at,
243 struct tcb *const tcp, const kernel_ulong_t addr)
244 {
245 siginfo_t si;
246
247 if (!umove_or_printaddr(tcp, addr, &si))
248 printsiginfo(&si);
249 }
250
251 static bool
print_siginfo_t(struct tcb * tcp,void * elem_buf,size_t elem_size,void * data)252 print_siginfo_t(struct tcb *tcp, void *elem_buf, size_t elem_size, void *data)
253 {
254 printsiginfo((const siginfo_t *) elem_buf);
255 return true;
256 }
257
MPERS_PRINTER_DECL(void,print_siginfo_array,struct tcb * const tcp,const kernel_ulong_t addr,const kernel_ulong_t len)258 MPERS_PRINTER_DECL(void, print_siginfo_array, struct tcb *const tcp,
259 const kernel_ulong_t addr, const kernel_ulong_t len)
260 {
261 siginfo_t si;
262
263 print_array(tcp, addr, len, &si, sizeof(si),
264 umoven_or_printaddr, print_siginfo_t, 0);
265 }
266