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)77 printsigval(const siginfo_t *sip)
78 {
79 tprintf(", si_value={int=%d, ptr=", sip->si_int);
80 printaddr(ptr_to_kulong(sip->si_ptr));
81 tprints("}");
82 }
83
84 static void
print_si_code(int si_signo,unsigned int si_code)85 print_si_code(int si_signo, unsigned int si_code)
86 {
87 const char *code = xlookup(siginfo_codes, si_code);
88
89 if (!code) {
90 switch (si_signo) {
91 case SIGTRAP:
92 code = xlookup(sigtrap_codes, si_code);
93 break;
94 case SIGCHLD:
95 code = xlookup(sigchld_codes, si_code);
96 break;
97 case SIGPOLL:
98 code = xlookup(sigpoll_codes, si_code);
99 break;
100 case SIGPROF:
101 code = xlookup(sigprof_codes, si_code);
102 break;
103 case SIGILL:
104 code = xlookup(sigill_codes, si_code);
105 break;
106 #ifdef SIGEMT
107 case SIGEMT:
108 code = xlookup(sigemt_codes, si_code);
109 break;
110 #endif
111 case SIGFPE:
112 code = xlookup(sigfpe_codes, si_code);
113 break;
114 case SIGSEGV:
115 code = xlookup(sigsegv_codes, si_code);
116 break;
117 case SIGBUS:
118 code = xlookup(sigbus_codes, si_code);
119 break;
120 case SIGSYS:
121 code = xlookup(sigsys_codes, si_code);
122 break;
123 }
124 }
125
126 if (code)
127 tprints(code);
128 else
129 tprintf("%#x", si_code);
130 }
131
132 static void
print_si_info(const siginfo_t * sip)133 print_si_info(const siginfo_t *sip)
134 {
135 if (sip->si_errno) {
136 tprints(", si_errno=");
137 if ((unsigned) sip->si_errno < nerrnos
138 && errnoent[sip->si_errno])
139 tprints(errnoent[sip->si_errno]);
140 else
141 tprintf("%d", sip->si_errno);
142 }
143
144 if (SI_FROMUSER(sip)) {
145 switch (sip->si_code) {
146 case SI_USER:
147 printsigsource(sip);
148 break;
149 case SI_TKILL:
150 printsigsource(sip);
151 break;
152 #if defined HAVE_SIGINFO_T_SI_TIMERID && defined HAVE_SIGINFO_T_SI_OVERRUN
153 case SI_TIMER:
154 tprintf(", si_timerid=%#x, si_overrun=%d",
155 sip->si_timerid, sip->si_overrun);
156 printsigval(sip);
157 break;
158 #endif
159 default:
160 printsigsource(sip);
161 if (sip->si_ptr)
162 printsigval(sip);
163 break;
164 }
165 } else {
166 switch (sip->si_signo) {
167 case SIGCHLD:
168 printsigsource(sip);
169 tprints(", si_status=");
170 if (sip->si_code == CLD_EXITED)
171 tprintf("%d", sip->si_status);
172 else
173 printsignal(sip->si_status);
174 tprintf(", si_utime=%llu, si_stime=%llu",
175 zero_extend_signed_to_ull(sip->si_utime),
176 zero_extend_signed_to_ull(sip->si_stime));
177 break;
178 case SIGILL: case SIGFPE:
179 case SIGSEGV: case SIGBUS:
180 tprints(", si_addr=");
181 printaddr(ptr_to_kulong(sip->si_addr));
182 break;
183 case SIGPOLL:
184 switch (sip->si_code) {
185 case POLL_IN: case POLL_OUT: case POLL_MSG:
186 tprintf(", si_band=%ld",
187 (long) sip->si_band);
188 break;
189 }
190 break;
191 #ifdef HAVE_SIGINFO_T_SI_SYSCALL
192 case SIGSYS: {
193 const char *scname =
194 syscall_name((unsigned) sip->si_syscall);
195
196 tprints(", si_call_addr=");
197 printaddr(ptr_to_kulong(sip->si_call_addr));
198 tprints(", si_syscall=");
199 if (scname)
200 tprintf("__NR_%s", scname);
201 else
202 tprintf("%u", (unsigned) sip->si_syscall);
203 tprints(", si_arch=");
204 printxval(audit_arch, sip->si_arch, "AUDIT_ARCH_???");
205 break;
206 }
207 #endif
208 default:
209 if (sip->si_pid || sip->si_uid)
210 printsigsource(sip);
211 if (sip->si_ptr)
212 printsigval(sip);
213 }
214 }
215 }
216
217 #ifdef IN_MPERS
218 static
219 #endif
220 void
printsiginfo(const siginfo_t * sip)221 printsiginfo(const siginfo_t *sip)
222 {
223 if (sip->si_signo == 0) {
224 tprints("{}");
225 return;
226 }
227 tprints("{si_signo=");
228 printsignal(sip->si_signo);
229
230 tprints(", si_code=");
231 print_si_code(sip->si_signo, sip->si_code);
232
233 #ifdef SI_NOINFO
234 if (sip->si_code != SI_NOINFO)
235 #endif
236 print_si_info(sip);
237
238 tprints("}");
239 }
240
MPERS_PRINTER_DECL(void,printsiginfo_at,struct tcb * const tcp,const kernel_ulong_t addr)241 MPERS_PRINTER_DECL(void, printsiginfo_at,
242 struct tcb *const tcp, const kernel_ulong_t addr)
243 {
244 siginfo_t si;
245
246 if (!umove_or_printaddr(tcp, addr, &si))
247 printsiginfo(&si);
248 }
249
250 static bool
print_siginfo_t(struct tcb * tcp,void * elem_buf,size_t elem_size,void * data)251 print_siginfo_t(struct tcb *tcp, void *elem_buf, size_t elem_size, void *data)
252 {
253 printsiginfo((const siginfo_t *) elem_buf);
254 return true;
255 }
256
MPERS_PRINTER_DECL(void,print_siginfo_array,struct tcb * const tcp,const kernel_ulong_t addr,const kernel_ulong_t len)257 MPERS_PRINTER_DECL(void, print_siginfo_array, struct tcb *const tcp,
258 const kernel_ulong_t addr, const kernel_ulong_t len)
259 {
260 siginfo_t si;
261
262 print_array(tcp, addr, len, &si, sizeof(si),
263 umoven_or_printaddr, print_siginfo_t, 0);
264 }
265