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