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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
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
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
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
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
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
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
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
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 }