Commit | Line | Data |
---|---|---|
252b5132 | 1 | /* BFD back-end for CISCO crash dumps. |
d3aeb6ee | 2 | Copyright 1994, 1997, 1999, 2000, 2001, 2002, 2004, 2005, 2006, 2007, |
2c3fc389 | 3 | 2010, 2011, 2012 |
9e7b37b3 | 4 | Free Software Foundation, Inc. |
252b5132 | 5 | |
cd123cb7 | 6 | This file is part of BFD, the Binary File Descriptor library. |
252b5132 | 7 | |
cd123cb7 NC |
8 | This program is free software; you can redistribute it and/or modify |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 3 of the License, or | |
11 | (at your option) any later version. | |
252b5132 | 12 | |
cd123cb7 NC |
13 | This program is distributed in the hope that it will be useful, |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
252b5132 | 17 | |
cd123cb7 NC |
18 | You should have received a copy of the GNU General Public License |
19 | along with this program; if not, write to the Free Software | |
20 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, | |
21 | MA 02110-1301, USA. */ | |
252b5132 | 22 | |
252b5132 | 23 | #include "sysdep.h" |
3db64b00 | 24 | #include "bfd.h" |
252b5132 RH |
25 | #include "libbfd.h" |
26 | /* core_file_failing_signal returns a host signal (this probably should | |
27 | be fixed). */ | |
28 | #include <signal.h> | |
29 | ||
30 | /* for MSVC builds */ | |
31 | #ifndef SIGTRAP | |
32 | # define SIGTRAP 5 | |
33 | #endif | |
34 | #ifndef SIGEMT | |
35 | # define SIGEMT 6 | |
36 | #endif | |
37 | #ifndef SIGBUS | |
38 | # define SIGBUS 10 | |
39 | #endif | |
40 | \f | |
2c3fc389 NC |
41 | int crash_info_locs[] = |
42 | { | |
f4bda984 RH |
43 | 0x0250, /* mips, ppc, x86, i960 */ |
44 | 0x0400, /* m68k, mips, x86, i960 */ | |
45 | 0x0FFC, /* m68k, mips, ppc, x86, i960 */ | |
46 | 0x3000, /* ppc */ | |
47 | 0x4FFC, /* m68k */ | |
48 | -1 | |
49 | }; | |
50 | ||
51 | #define CRASH_MAGIC 0xdead1234 | |
52 | #define MASK_ADDR(x) ((x) & 0x0fffffff) /* Mask crash info address */ | |
252b5132 | 53 | |
2c3fc389 NC |
54 | typedef enum |
55 | { | |
56 | CRASH_REASON_NOTCRASHED = 0, | |
57 | CRASH_REASON_EXCEPTION = 1, | |
58 | CRASH_REASON_CORRUPT = 2, | |
f4bda984 | 59 | } crashreason; |
252b5132 | 60 | |
2c3fc389 NC |
61 | typedef struct |
62 | { | |
f4bda984 | 63 | char magic[4]; /* Magic number */ |
252b5132 RH |
64 | char version[4]; /* Version number */ |
65 | char reason[4]; /* Crash reason */ | |
66 | char cpu_vector[4]; /* CPU vector for exceptions */ | |
67 | char registers[4]; /* Pointer to saved registers */ | |
68 | char rambase[4]; /* Base of RAM (not in V1 crash info) */ | |
f4bda984 RH |
69 | char textbase[4]; /* Base of .text section (not in V3 crash info) */ |
70 | char database[4]; /* Base of .data section (not in V3 crash info) */ | |
71 | char bssbase[4]; /* Base of .bss section (not in V3 crash info) */ | |
72 | } crashinfo_external; | |
dc810e39 | 73 | |
252b5132 RH |
74 | struct cisco_core_struct |
75 | { | |
76 | int sig; | |
77 | }; | |
dc810e39 | 78 | |
69d246d9 | 79 | #define cisco_core_file_matches_executable_p generic_core_file_matches_executable_p |
35e7447c | 80 | #define cisco_core_file_pid _bfd_nocore_core_file_pid |
252b5132 | 81 | \f |
f4bda984 | 82 | /* Examine the file for a crash info struct at the offset given by |
e60b52c6 | 83 | CRASH_INFO_LOC. */ |
f4bda984 | 84 | |
252b5132 | 85 | static const bfd_target * |
2c3fc389 | 86 | cisco_core_file_validate (bfd *abfd, int crash_info_loc) |
252b5132 RH |
87 | { |
88 | char buf[4]; | |
89 | unsigned int crashinfo_offset; | |
f4bda984 | 90 | crashinfo_external crashinfo; |
74633dd0 | 91 | bfd_size_type nread; |
f4bda984 RH |
92 | unsigned int magic; |
93 | unsigned int version; | |
252b5132 RH |
94 | unsigned int rambase; |
95 | sec_ptr asect; | |
96 | struct stat statbuf; | |
dc810e39 | 97 | bfd_size_type amt; |
117ed4f8 | 98 | flagword flags; |
252b5132 | 99 | |
dc810e39 | 100 | if (bfd_seek (abfd, (file_ptr) crash_info_loc, SEEK_SET) != 0) |
252b5132 RH |
101 | return NULL; |
102 | ||
dc810e39 | 103 | nread = bfd_bread (buf, (bfd_size_type) 4, abfd); |
252b5132 RH |
104 | if (nread != 4) |
105 | { | |
106 | if (bfd_get_error () != bfd_error_system_call) | |
107 | bfd_set_error (bfd_error_wrong_format); | |
108 | return NULL; | |
109 | } | |
f4bda984 | 110 | crashinfo_offset = MASK_ADDR (bfd_get_32 (abfd, buf)); |
252b5132 | 111 | |
dc810e39 | 112 | if (bfd_seek (abfd, (file_ptr) crashinfo_offset, SEEK_SET) != 0) |
f4bda984 RH |
113 | { |
114 | /* Most likely we failed because of a bogus (huge) offset */ | |
115 | bfd_set_error (bfd_error_wrong_format); | |
116 | return NULL; | |
117 | } | |
252b5132 | 118 | |
dc810e39 | 119 | nread = bfd_bread (&crashinfo, (bfd_size_type) sizeof (crashinfo), abfd); |
252b5132 RH |
120 | if (nread != sizeof (crashinfo)) |
121 | { | |
122 | if (bfd_get_error () != bfd_error_system_call) | |
123 | bfd_set_error (bfd_error_wrong_format); | |
124 | return NULL; | |
125 | } | |
126 | ||
127 | if (bfd_stat (abfd, &statbuf) < 0) | |
128 | { | |
129 | bfd_set_error (bfd_error_system_call); | |
130 | return NULL; | |
131 | } | |
132 | ||
f4bda984 RH |
133 | magic = bfd_get_32 (abfd, crashinfo.magic); |
134 | if (magic != CRASH_MAGIC) | |
252b5132 RH |
135 | { |
136 | bfd_set_error (bfd_error_wrong_format); | |
137 | return NULL; | |
138 | } | |
139 | ||
f4bda984 RH |
140 | version = bfd_get_32 (abfd, crashinfo.version); |
141 | if (version == 0) | |
252b5132 | 142 | { |
252b5132 RH |
143 | bfd_set_error (bfd_error_wrong_format); |
144 | return NULL; | |
f4bda984 RH |
145 | } |
146 | else if (version == 1) | |
147 | { | |
148 | /* V1 core dumps don't specify the dump base, assume 0 */ | |
252b5132 | 149 | rambase = 0; |
f4bda984 RH |
150 | } |
151 | else | |
152 | { | |
252b5132 | 153 | rambase = bfd_get_32 (abfd, crashinfo.rambase); |
252b5132 RH |
154 | } |
155 | ||
156 | /* OK, we believe you. You're a core file. */ | |
157 | ||
dc810e39 AM |
158 | amt = sizeof (struct cisco_core_struct); |
159 | abfd->tdata.cisco_core_data = (struct cisco_core_struct *) bfd_zmalloc (amt); | |
252b5132 RH |
160 | if (abfd->tdata.cisco_core_data == NULL) |
161 | return NULL; | |
162 | ||
163 | switch ((crashreason) bfd_get_32 (abfd, crashinfo.reason)) | |
164 | { | |
165 | case CRASH_REASON_NOTCRASHED: | |
166 | /* Crash file probably came from write core. */ | |
167 | abfd->tdata.cisco_core_data->sig = 0; | |
168 | break; | |
169 | case CRASH_REASON_CORRUPT: | |
170 | /* The crash context area was corrupt -- proceed with caution. | |
171 | We have no way of passing this information back to the caller. */ | |
172 | abfd->tdata.cisco_core_data->sig = 0; | |
173 | break; | |
174 | case CRASH_REASON_EXCEPTION: | |
175 | /* Crash occured due to CPU exception. */ | |
176 | ||
177 | /* This is 68k-specific; for MIPS we'll need to interpret | |
178 | cpu_vector differently based on the target configuration | |
179 | (since CISCO core files don't seem to have the processor | |
180 | encoded in them). */ | |
181 | ||
182 | switch (bfd_get_32 (abfd, crashinfo.cpu_vector)) | |
183 | { | |
184 | /* bus error */ | |
185 | case 2 : abfd->tdata.cisco_core_data->sig = SIGBUS; break; | |
186 | /* address error */ | |
187 | case 3 : abfd->tdata.cisco_core_data->sig = SIGBUS; break; | |
188 | /* illegal instruction */ | |
189 | case 4 : abfd->tdata.cisco_core_data->sig = SIGILL; break; | |
190 | /* zero divide */ | |
191 | case 5 : abfd->tdata.cisco_core_data->sig = SIGFPE; break; | |
192 | /* chk instruction */ | |
193 | case 6 : abfd->tdata.cisco_core_data->sig = SIGFPE; break; | |
194 | /* trapv instruction */ | |
195 | case 7 : abfd->tdata.cisco_core_data->sig = SIGFPE; break; | |
196 | /* privilege violation */ | |
197 | case 8 : abfd->tdata.cisco_core_data->sig = SIGSEGV; break; | |
198 | /* trace trap */ | |
199 | case 9 : abfd->tdata.cisco_core_data->sig = SIGTRAP; break; | |
200 | /* line 1010 emulator */ | |
201 | case 10: abfd->tdata.cisco_core_data->sig = SIGILL; break; | |
202 | /* line 1111 emulator */ | |
203 | case 11: abfd->tdata.cisco_core_data->sig = SIGILL; break; | |
204 | ||
205 | /* Coprocessor protocol violation. Using a standard MMU or FPU | |
206 | this cannot be triggered by software. Call it a SIGBUS. */ | |
207 | case 13: abfd->tdata.cisco_core_data->sig = SIGBUS; break; | |
208 | ||
209 | /* interrupt */ | |
210 | case 31: abfd->tdata.cisco_core_data->sig = SIGINT; break; | |
211 | /* breakpoint */ | |
212 | case 33: abfd->tdata.cisco_core_data->sig = SIGTRAP; break; | |
213 | ||
214 | /* floating point err */ | |
215 | case 48: abfd->tdata.cisco_core_data->sig = SIGFPE; break; | |
216 | /* floating point err */ | |
217 | case 49: abfd->tdata.cisco_core_data->sig = SIGFPE; break; | |
218 | /* zero divide */ | |
219 | case 50: abfd->tdata.cisco_core_data->sig = SIGFPE; break; | |
220 | /* underflow */ | |
221 | case 51: abfd->tdata.cisco_core_data->sig = SIGFPE; break; | |
222 | /* operand error */ | |
223 | case 52: abfd->tdata.cisco_core_data->sig = SIGFPE; break; | |
224 | /* overflow */ | |
225 | case 53: abfd->tdata.cisco_core_data->sig = SIGFPE; break; | |
226 | /* NAN */ | |
227 | case 54: abfd->tdata.cisco_core_data->sig = SIGFPE; break; | |
228 | default: | |
229 | #ifndef SIGEMT | |
230 | #define SIGEMT SIGTRAP | |
231 | #endif | |
232 | /* "software generated"*/ | |
233 | abfd->tdata.cisco_core_data->sig = SIGEMT; | |
234 | } | |
235 | break; | |
236 | default: | |
237 | /* Unknown crash reason. */ | |
238 | abfd->tdata.cisco_core_data->sig = 0; | |
239 | break; | |
240 | } | |
241 | ||
9e7b37b3 AM |
242 | /* Create a ".data" section that maps the entire file, which is |
243 | essentially a dump of the target system's RAM. */ | |
f4bda984 | 244 | |
117ed4f8 AM |
245 | flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS; |
246 | asect = bfd_make_section_anyway_with_flags (abfd, ".data", flags); | |
252b5132 RH |
247 | if (asect == NULL) |
248 | goto error_return; | |
9e7b37b3 | 249 | /* The size of memory is the size of the core file itself. */ |
eea6121a | 250 | asect->size = statbuf.st_size; |
9e7b37b3 AM |
251 | asect->vma = rambase; |
252 | asect->filepos = 0; | |
252b5132 | 253 | |
f4bda984 | 254 | /* Create a ".crash" section to allow access to the saved |
e60b52c6 | 255 | crash information. */ |
f4bda984 | 256 | |
117ed4f8 AM |
257 | flags = SEC_HAS_CONTENTS; |
258 | asect = bfd_make_section_anyway_with_flags (abfd, ".crash", flags); | |
f4bda984 RH |
259 | if (asect == NULL) |
260 | goto error_return; | |
f4bda984 RH |
261 | asect->vma = 0; |
262 | asect->filepos = crashinfo_offset; | |
eea6121a | 263 | asect->size = sizeof (crashinfo); |
f4bda984 | 264 | |
9e7b37b3 AM |
265 | /* Create a ".reg" section to allow access to the saved |
266 | registers. */ | |
f4bda984 | 267 | |
117ed4f8 | 268 | asect = bfd_make_section_anyway_with_flags (abfd, ".reg", flags); |
252b5132 RH |
269 | if (asect == NULL) |
270 | goto error_return; | |
9e7b37b3 AM |
271 | asect->vma = 0; |
272 | asect->filepos = bfd_get_32 (abfd, crashinfo.registers) - rambase; | |
273 | /* Since we don't know the exact size of the saved register info, | |
274 | choose a register section size that is either the remaining part | |
275 | of the file, or 1024, whichever is smaller. */ | |
276 | nread = statbuf.st_size - asect->filepos; | |
eea6121a | 277 | asect->size = (nread < 1024) ? nread : 1024; |
252b5132 RH |
278 | |
279 | return abfd->xvec; | |
280 | ||
f4bda984 | 281 | /* Get here if we have already started filling out the BFD |
e60b52c6 | 282 | and there is an error of some kind. */ |
f4bda984 | 283 | |
252b5132 | 284 | error_return: |
9e7b37b3 AM |
285 | bfd_release (abfd, abfd->tdata.any); |
286 | abfd->tdata.any = NULL; | |
287 | bfd_section_list_clear (abfd); | |
288 | return NULL; | |
252b5132 RH |
289 | } |
290 | ||
f4bda984 | 291 | static const bfd_target * |
2c3fc389 | 292 | cisco_core_file_p (bfd *abfd) |
f4bda984 RH |
293 | { |
294 | int *crash_info_locp; | |
295 | const bfd_target *target = NULL; | |
296 | ||
297 | for (crash_info_locp = crash_info_locs; | |
298 | *crash_info_locp != -1 && target == NULL; | |
299 | crash_info_locp++) | |
300 | { | |
301 | target = cisco_core_file_validate (abfd, *crash_info_locp); | |
302 | } | |
303 | return (target); | |
304 | } | |
305 | ||
d86492f2 | 306 | static char * |
2c3fc389 | 307 | cisco_core_file_failing_command (bfd *abfd ATTRIBUTE_UNUSED) |
252b5132 RH |
308 | { |
309 | return NULL; | |
310 | } | |
311 | ||
d86492f2 | 312 | static int |
2c3fc389 | 313 | cisco_core_file_failing_signal (bfd *abfd ATTRIBUTE_UNUSED) |
252b5132 RH |
314 | { |
315 | return abfd->tdata.cisco_core_data->sig; | |
316 | } | |
252b5132 | 317 | \f |
f4bda984 RH |
318 | extern const bfd_target cisco_core_little_vec; |
319 | ||
320 | const bfd_target cisco_core_big_vec = | |
2c3fc389 | 321 | { |
f4bda984 | 322 | "cisco-ios-core-big", |
252b5132 RH |
323 | bfd_target_unknown_flavour, |
324 | BFD_ENDIAN_BIG, /* target byte order */ | |
325 | BFD_ENDIAN_BIG, /* target headers byte order */ | |
326 | (HAS_RELOC | EXEC_P | /* object flags */ | |
327 | HAS_LINENO | HAS_DEBUG | | |
328 | HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED), | |
329 | (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */ | |
d3aeb6ee AM |
330 | 0, /* symbol prefix */ |
331 | ' ', /* ar_pad_char */ | |
332 | 16, /* ar_max_namelen */ | |
333 | 0, /* match priority. */ | |
252b5132 RH |
334 | bfd_getb64, bfd_getb_signed_64, bfd_putb64, |
335 | bfd_getb32, bfd_getb_signed_32, bfd_putb32, | |
336 | bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* data */ | |
337 | bfd_getb64, bfd_getb_signed_64, bfd_putb64, | |
338 | bfd_getb32, bfd_getb_signed_32, bfd_putb32, | |
339 | bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* hdrs */ | |
340 | ||
341 | { /* bfd_check_format */ | |
342 | _bfd_dummy_target, /* unknown format */ | |
343 | _bfd_dummy_target, /* object file */ | |
344 | _bfd_dummy_target, /* archive */ | |
345 | cisco_core_file_p /* a core file */ | |
346 | }, | |
347 | { /* bfd_set_format */ | |
348 | bfd_false, bfd_false, | |
349 | bfd_false, bfd_false | |
350 | }, | |
351 | { /* bfd_write_contents */ | |
352 | bfd_false, bfd_false, | |
353 | bfd_false, bfd_false | |
354 | }, | |
e60b52c6 | 355 | |
252b5132 RH |
356 | BFD_JUMP_TABLE_GENERIC (_bfd_generic), |
357 | BFD_JUMP_TABLE_COPY (_bfd_generic), | |
358 | BFD_JUMP_TABLE_CORE (cisco), | |
359 | BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive), | |
360 | BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols), | |
361 | BFD_JUMP_TABLE_RELOCS (_bfd_norelocs), | |
362 | BFD_JUMP_TABLE_WRITE (_bfd_generic), | |
363 | BFD_JUMP_TABLE_LINK (_bfd_nolink), | |
364 | BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), | |
365 | ||
f4bda984 | 366 | & cisco_core_little_vec, |
e60b52c6 | 367 | |
2c3fc389 | 368 | NULL /* backend_data */ |
f4bda984 RH |
369 | }; |
370 | ||
371 | const bfd_target cisco_core_little_vec = | |
2c3fc389 | 372 | { |
f4bda984 RH |
373 | "cisco-ios-core-little", |
374 | bfd_target_unknown_flavour, | |
375 | BFD_ENDIAN_LITTLE, /* target byte order */ | |
376 | BFD_ENDIAN_LITTLE, /* target headers byte order */ | |
377 | (HAS_RELOC | EXEC_P | /* object flags */ | |
378 | HAS_LINENO | HAS_DEBUG | | |
379 | HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED), | |
380 | (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */ | |
381 | 0, /* symbol prefix */ | |
382 | ' ', /* ar_pad_char */ | |
383 | 16, /* ar_max_namelen */ | |
20ee8bc9 | 384 | 0, /* match_priority */ |
f4bda984 RH |
385 | bfd_getl64, bfd_getl_signed_64, bfd_putl64, |
386 | bfd_getl32, bfd_getl_signed_32, bfd_putl32, | |
387 | bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */ | |
388 | bfd_getl64, bfd_getl_signed_64, bfd_putl64, | |
389 | bfd_getl32, bfd_getl_signed_32, bfd_putl32, | |
390 | bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */ | |
391 | ||
392 | { /* bfd_check_format */ | |
393 | _bfd_dummy_target, /* unknown format */ | |
394 | _bfd_dummy_target, /* object file */ | |
395 | _bfd_dummy_target, /* archive */ | |
396 | cisco_core_file_p /* a core file */ | |
397 | }, | |
398 | { /* bfd_set_format */ | |
399 | bfd_false, bfd_false, | |
400 | bfd_false, bfd_false | |
401 | }, | |
402 | { /* bfd_write_contents */ | |
403 | bfd_false, bfd_false, | |
404 | bfd_false, bfd_false | |
405 | }, | |
e60b52c6 | 406 | |
f4bda984 RH |
407 | BFD_JUMP_TABLE_GENERIC (_bfd_generic), |
408 | BFD_JUMP_TABLE_COPY (_bfd_generic), | |
409 | BFD_JUMP_TABLE_CORE (cisco), | |
410 | BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive), | |
411 | BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols), | |
412 | BFD_JUMP_TABLE_RELOCS (_bfd_norelocs), | |
413 | BFD_JUMP_TABLE_WRITE (_bfd_generic), | |
414 | BFD_JUMP_TABLE_LINK (_bfd_nolink), | |
415 | BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), | |
416 | ||
417 | &cisco_core_big_vec, | |
e60b52c6 | 418 | |
2c3fc389 | 419 | NULL /* backend_data */ |
252b5132 | 420 | }; |