* ldlang.c (lang_do_assignments): Function return is void.
[binutils.git] / bfd / cisco-core.c
blob6b3a71b0ab3ee4dd3cfb60fbcfaf4325844f2340
1 /* BFD back-end for CISCO crash dumps.
2 Copyright 1994, 1997, 1999, 2000, 2001, 2002
3 Free Software Foundation, Inc.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
21 #include "bfd.h"
22 #include "sysdep.h"
23 #include "libbfd.h"
24 /* core_file_failing_signal returns a host signal (this probably should
25 be fixed). */
26 #include <signal.h>
28 /* for MSVC builds */
29 #ifndef SIGTRAP
30 # define SIGTRAP 5
31 #endif
32 #ifndef SIGEMT
33 # define SIGEMT 6
34 #endif
35 #ifndef SIGBUS
36 # define SIGBUS 10
37 #endif
39 int crash_info_locs[] = {
40 0x0250, /* mips, ppc, x86, i960 */
41 0x0400, /* m68k, mips, x86, i960 */
42 0x0FFC, /* m68k, mips, ppc, x86, i960 */
43 0x3000, /* ppc */
44 0x4FFC, /* m68k */
48 #define CRASH_MAGIC 0xdead1234
49 #define MASK_ADDR(x) ((x) & 0x0fffffff) /* Mask crash info address */
51 typedef enum {
52 CRASH_REASON_NOTCRASHED = 0,
53 CRASH_REASON_EXCEPTION = 1,
54 CRASH_REASON_CORRUPT = 2,
55 } crashreason;
57 typedef struct {
58 char magic[4]; /* Magic number */
59 char version[4]; /* Version number */
60 char reason[4]; /* Crash reason */
61 char cpu_vector[4]; /* CPU vector for exceptions */
62 char registers[4]; /* Pointer to saved registers */
63 char rambase[4]; /* Base of RAM (not in V1 crash info) */
64 char textbase[4]; /* Base of .text section (not in V3 crash info) */
65 char database[4]; /* Base of .data section (not in V3 crash info) */
66 char bssbase[4]; /* Base of .bss section (not in V3 crash info) */
67 } crashinfo_external;
69 struct cisco_core_struct
71 int sig;
74 static const bfd_target *cisco_core_file_validate PARAMS ((bfd *, int));
75 static const bfd_target *cisco_core_file_p PARAMS ((bfd *));
76 char *cisco_core_file_failing_command PARAMS ((bfd *));
77 int cisco_core_file_failing_signal PARAMS ((bfd *));
78 bfd_boolean cisco_core_file_matches_executable_p PARAMS ((bfd *, bfd *));
80 /* Examine the file for a crash info struct at the offset given by
81 CRASH_INFO_LOC. */
83 static const bfd_target *
84 cisco_core_file_validate (abfd, crash_info_loc)
85 bfd *abfd;
86 int crash_info_loc;
88 char buf[4];
89 unsigned int crashinfo_offset;
90 crashinfo_external crashinfo;
91 int nread;
92 unsigned int magic;
93 unsigned int version;
94 unsigned int rambase;
95 sec_ptr asect;
96 struct stat statbuf;
97 bfd_size_type amt;
99 if (bfd_seek (abfd, (file_ptr) crash_info_loc, SEEK_SET) != 0)
100 return NULL;
102 nread = bfd_bread (buf, (bfd_size_type) 4, abfd);
103 if (nread != 4)
105 if (bfd_get_error () != bfd_error_system_call)
106 bfd_set_error (bfd_error_wrong_format);
107 return NULL;
109 crashinfo_offset = MASK_ADDR (bfd_get_32 (abfd, buf));
111 if (bfd_seek (abfd, (file_ptr) crashinfo_offset, SEEK_SET) != 0)
113 /* Most likely we failed because of a bogus (huge) offset */
114 bfd_set_error (bfd_error_wrong_format);
115 return NULL;
118 nread = bfd_bread (&crashinfo, (bfd_size_type) sizeof (crashinfo), abfd);
119 if (nread != sizeof (crashinfo))
121 if (bfd_get_error () != bfd_error_system_call)
122 bfd_set_error (bfd_error_wrong_format);
123 return NULL;
126 if (bfd_stat (abfd, &statbuf) < 0)
128 bfd_set_error (bfd_error_system_call);
129 return NULL;
132 magic = bfd_get_32 (abfd, crashinfo.magic);
133 if (magic != CRASH_MAGIC)
135 bfd_set_error (bfd_error_wrong_format);
136 return NULL;
139 version = bfd_get_32 (abfd, crashinfo.version);
140 if (version == 0)
142 bfd_set_error (bfd_error_wrong_format);
143 return NULL;
145 else if (version == 1)
147 /* V1 core dumps don't specify the dump base, assume 0 */
148 rambase = 0;
150 else
152 rambase = bfd_get_32 (abfd, crashinfo.rambase);
155 /* OK, we believe you. You're a core file. */
157 amt = sizeof (struct cisco_core_struct);
158 abfd->tdata.cisco_core_data = (struct cisco_core_struct *) bfd_zmalloc (amt);
159 if (abfd->tdata.cisco_core_data == NULL)
160 return NULL;
162 switch ((crashreason) bfd_get_32 (abfd, crashinfo.reason))
164 case CRASH_REASON_NOTCRASHED:
165 /* Crash file probably came from write core. */
166 abfd->tdata.cisco_core_data->sig = 0;
167 break;
168 case CRASH_REASON_CORRUPT:
169 /* The crash context area was corrupt -- proceed with caution.
170 We have no way of passing this information back to the caller. */
171 abfd->tdata.cisco_core_data->sig = 0;
172 break;
173 case CRASH_REASON_EXCEPTION:
174 /* Crash occured due to CPU exception. */
176 /* This is 68k-specific; for MIPS we'll need to interpret
177 cpu_vector differently based on the target configuration
178 (since CISCO core files don't seem to have the processor
179 encoded in them). */
181 switch (bfd_get_32 (abfd, crashinfo.cpu_vector))
183 /* bus error */
184 case 2 : abfd->tdata.cisco_core_data->sig = SIGBUS; break;
185 /* address error */
186 case 3 : abfd->tdata.cisco_core_data->sig = SIGBUS; break;
187 /* illegal instruction */
188 case 4 : abfd->tdata.cisco_core_data->sig = SIGILL; break;
189 /* zero divide */
190 case 5 : abfd->tdata.cisco_core_data->sig = SIGFPE; break;
191 /* chk instruction */
192 case 6 : abfd->tdata.cisco_core_data->sig = SIGFPE; break;
193 /* trapv instruction */
194 case 7 : abfd->tdata.cisco_core_data->sig = SIGFPE; break;
195 /* privilege violation */
196 case 8 : abfd->tdata.cisco_core_data->sig = SIGSEGV; break;
197 /* trace trap */
198 case 9 : abfd->tdata.cisco_core_data->sig = SIGTRAP; break;
199 /* line 1010 emulator */
200 case 10: abfd->tdata.cisco_core_data->sig = SIGILL; break;
201 /* line 1111 emulator */
202 case 11: abfd->tdata.cisco_core_data->sig = SIGILL; break;
204 /* Coprocessor protocol violation. Using a standard MMU or FPU
205 this cannot be triggered by software. Call it a SIGBUS. */
206 case 13: abfd->tdata.cisco_core_data->sig = SIGBUS; break;
208 /* interrupt */
209 case 31: abfd->tdata.cisco_core_data->sig = SIGINT; break;
210 /* breakpoint */
211 case 33: abfd->tdata.cisco_core_data->sig = SIGTRAP; break;
213 /* floating point err */
214 case 48: abfd->tdata.cisco_core_data->sig = SIGFPE; break;
215 /* floating point err */
216 case 49: abfd->tdata.cisco_core_data->sig = SIGFPE; break;
217 /* zero divide */
218 case 50: abfd->tdata.cisco_core_data->sig = SIGFPE; break;
219 /* underflow */
220 case 51: abfd->tdata.cisco_core_data->sig = SIGFPE; break;
221 /* operand error */
222 case 52: abfd->tdata.cisco_core_data->sig = SIGFPE; break;
223 /* overflow */
224 case 53: abfd->tdata.cisco_core_data->sig = SIGFPE; break;
225 /* NAN */
226 case 54: abfd->tdata.cisco_core_data->sig = SIGFPE; break;
227 default:
228 #ifndef SIGEMT
229 #define SIGEMT SIGTRAP
230 #endif
231 /* "software generated"*/
232 abfd->tdata.cisco_core_data->sig = SIGEMT;
234 break;
235 default:
236 /* Unknown crash reason. */
237 abfd->tdata.cisco_core_data->sig = 0;
238 break;
241 /* Create a ".data" section that maps the entire file, which is
242 essentially a dump of the target system's RAM. */
244 asect = bfd_make_section_anyway (abfd, ".data");
245 if (asect == NULL)
246 goto error_return;
247 asect->flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS;
248 /* The size of memory is the size of the core file itself. */
249 asect->_raw_size = statbuf.st_size;
250 asect->vma = rambase;
251 asect->filepos = 0;
253 /* Create a ".crash" section to allow access to the saved
254 crash information. */
256 asect = bfd_make_section_anyway (abfd, ".crash");
257 if (asect == NULL)
258 goto error_return;
259 asect->flags = SEC_HAS_CONTENTS;
260 asect->vma = 0;
261 asect->filepos = crashinfo_offset;
262 asect->_raw_size = sizeof (crashinfo);
264 /* Create a ".reg" section to allow access to the saved
265 registers. */
267 asect = bfd_make_section_anyway (abfd, ".reg");
268 if (asect == NULL)
269 goto error_return;
270 asect->flags = SEC_HAS_CONTENTS;
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;
277 asect->_raw_size = (nread < 1024) ? nread : 1024;
279 return abfd->xvec;
281 /* Get here if we have already started filling out the BFD
282 and there is an error of some kind. */
284 error_return:
285 bfd_release (abfd, abfd->tdata.any);
286 abfd->tdata.any = NULL;
287 bfd_section_list_clear (abfd);
288 return NULL;
291 static const bfd_target *
292 cisco_core_file_p (abfd)
293 bfd *abfd;
295 int *crash_info_locp;
296 const bfd_target *target = NULL;
298 for (crash_info_locp = crash_info_locs;
299 *crash_info_locp != -1 && target == NULL;
300 crash_info_locp++)
302 target = cisco_core_file_validate (abfd, *crash_info_locp);
304 return (target);
307 char *
308 cisco_core_file_failing_command (abfd)
309 bfd *abfd ATTRIBUTE_UNUSED;
311 return NULL;
315 cisco_core_file_failing_signal (abfd)
316 bfd *abfd ATTRIBUTE_UNUSED;
318 return abfd->tdata.cisco_core_data->sig;
321 bfd_boolean
322 cisco_core_file_matches_executable_p (core_bfd, exec_bfd)
323 bfd *core_bfd ATTRIBUTE_UNUSED;
324 bfd *exec_bfd ATTRIBUTE_UNUSED;
326 return TRUE;
329 extern const bfd_target cisco_core_little_vec;
331 const bfd_target cisco_core_big_vec =
333 "cisco-ios-core-big",
334 bfd_target_unknown_flavour,
335 BFD_ENDIAN_BIG, /* target byte order */
336 BFD_ENDIAN_BIG, /* target headers byte order */
337 (HAS_RELOC | EXEC_P | /* object flags */
338 HAS_LINENO | HAS_DEBUG |
339 HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
340 (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
341 0, /* symbol prefix */
342 ' ', /* ar_pad_char */
343 16, /* ar_max_namelen */
344 bfd_getb64, bfd_getb_signed_64, bfd_putb64,
345 bfd_getb32, bfd_getb_signed_32, bfd_putb32,
346 bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* data */
347 bfd_getb64, bfd_getb_signed_64, bfd_putb64,
348 bfd_getb32, bfd_getb_signed_32, bfd_putb32,
349 bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* hdrs */
351 { /* bfd_check_format */
352 _bfd_dummy_target, /* unknown format */
353 _bfd_dummy_target, /* object file */
354 _bfd_dummy_target, /* archive */
355 cisco_core_file_p /* a core file */
357 { /* bfd_set_format */
358 bfd_false, bfd_false,
359 bfd_false, bfd_false
361 { /* bfd_write_contents */
362 bfd_false, bfd_false,
363 bfd_false, bfd_false
366 BFD_JUMP_TABLE_GENERIC (_bfd_generic),
367 BFD_JUMP_TABLE_COPY (_bfd_generic),
368 BFD_JUMP_TABLE_CORE (cisco),
369 BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
370 BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
371 BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
372 BFD_JUMP_TABLE_WRITE (_bfd_generic),
373 BFD_JUMP_TABLE_LINK (_bfd_nolink),
374 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
376 & cisco_core_little_vec,
378 (PTR) 0 /* backend_data */
381 const bfd_target cisco_core_little_vec =
383 "cisco-ios-core-little",
384 bfd_target_unknown_flavour,
385 BFD_ENDIAN_LITTLE, /* target byte order */
386 BFD_ENDIAN_LITTLE, /* target headers byte order */
387 (HAS_RELOC | EXEC_P | /* object flags */
388 HAS_LINENO | HAS_DEBUG |
389 HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
390 (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
391 0, /* symbol prefix */
392 ' ', /* ar_pad_char */
393 16, /* ar_max_namelen */
394 bfd_getl64, bfd_getl_signed_64, bfd_putl64,
395 bfd_getl32, bfd_getl_signed_32, bfd_putl32,
396 bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */
397 bfd_getl64, bfd_getl_signed_64, bfd_putl64,
398 bfd_getl32, bfd_getl_signed_32, bfd_putl32,
399 bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */
401 { /* bfd_check_format */
402 _bfd_dummy_target, /* unknown format */
403 _bfd_dummy_target, /* object file */
404 _bfd_dummy_target, /* archive */
405 cisco_core_file_p /* a core file */
407 { /* bfd_set_format */
408 bfd_false, bfd_false,
409 bfd_false, bfd_false
411 { /* bfd_write_contents */
412 bfd_false, bfd_false,
413 bfd_false, bfd_false
416 BFD_JUMP_TABLE_GENERIC (_bfd_generic),
417 BFD_JUMP_TABLE_COPY (_bfd_generic),
418 BFD_JUMP_TABLE_CORE (cisco),
419 BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
420 BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
421 BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
422 BFD_JUMP_TABLE_WRITE (_bfd_generic),
423 BFD_JUMP_TABLE_LINK (_bfd_nolink),
424 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
426 &cisco_core_big_vec,
428 (PTR) 0 /* backend_data */