1 /* BFD back-end for CISCO crash dumps.
3 Copyright 1994 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. */
24 /* core_file_failing_signal returns a host signal (this probably should
39 #define CRASH_INFO (0xffc)
40 #define CRASH_MAGIC 0xdead1234
43 CRASH_REASON_NOTCRASHED = 0,
44 CRASH_REASON_EXCEPTION = 1,
45 CRASH_REASON_CORRUPT = 2,
48 struct crashinfo_external
50 char magic[4]; /* Magic number */
51 char version[4]; /* Version number */
52 char reason[4]; /* Crash reason */
53 char cpu_vector[4]; /* CPU vector for exceptions */
54 char registers[4]; /* Pointer to saved registers */
55 char rambase[4]; /* Base of RAM (not in V1 crash info) */
58 struct cisco_core_struct
63 static const bfd_target *
64 cisco_core_file_p (abfd)
68 unsigned int crashinfo_offset;
69 struct crashinfo_external crashinfo;
75 if (bfd_seek (abfd, CRASH_INFO, SEEK_SET) != 0)
78 nread = bfd_read (buf, 1, 4, abfd);
81 if (bfd_get_error () != bfd_error_system_call)
82 bfd_set_error (bfd_error_wrong_format);
85 crashinfo_offset = bfd_get_32 (abfd, buf);
87 if (bfd_seek (abfd, crashinfo_offset, SEEK_SET) != 0)
90 nread = bfd_read (&crashinfo, 1, sizeof (crashinfo), abfd);
91 if (nread != sizeof (crashinfo))
93 if (bfd_get_error () != bfd_error_system_call)
94 bfd_set_error (bfd_error_wrong_format);
98 if (bfd_stat (abfd, &statbuf) < 0)
100 bfd_set_error (bfd_error_system_call);
104 if (bfd_get_32 (abfd, crashinfo.magic) != CRASH_MAGIC)
106 bfd_set_error (bfd_error_wrong_format);
110 switch (bfd_get_32 (abfd, crashinfo.version))
113 bfd_set_error (bfd_error_wrong_format);
120 rambase = bfd_get_32 (abfd, crashinfo.rambase);
124 /* OK, we believe you. You're a core file. */
126 abfd->tdata.cisco_core_data =
127 ((struct cisco_core_struct *)
128 bfd_zmalloc (sizeof (struct cisco_core_struct)));
129 if (abfd->tdata.cisco_core_data == NULL)
132 switch ((crashreason) bfd_get_32 (abfd, crashinfo.reason))
134 case CRASH_REASON_NOTCRASHED:
135 /* Crash file probably came from write core. */
136 abfd->tdata.cisco_core_data->sig = 0;
138 case CRASH_REASON_CORRUPT:
139 /* The crash context area was corrupt -- proceed with caution.
140 We have no way of passing this information back to the caller. */
141 abfd->tdata.cisco_core_data->sig = 0;
143 case CRASH_REASON_EXCEPTION:
144 /* Crash occured due to CPU exception. */
146 /* This is 68k-specific; for MIPS we'll need to interpret
147 cpu_vector differently based on the target configuration
148 (since CISCO core files don't seem to have the processor
151 switch (bfd_get_32 (abfd, crashinfo.cpu_vector))
154 case 2 : abfd->tdata.cisco_core_data->sig = SIGBUS; break;
156 case 3 : abfd->tdata.cisco_core_data->sig = SIGBUS; break;
157 /* illegal instruction */
158 case 4 : abfd->tdata.cisco_core_data->sig = SIGILL; break;
160 case 5 : abfd->tdata.cisco_core_data->sig = SIGFPE; break;
161 /* chk instruction */
162 case 6 : abfd->tdata.cisco_core_data->sig = SIGFPE; break;
163 /* trapv instruction */
164 case 7 : abfd->tdata.cisco_core_data->sig = SIGFPE; break;
165 /* privilege violation */
166 case 8 : abfd->tdata.cisco_core_data->sig = SIGSEGV; break;
168 case 9 : abfd->tdata.cisco_core_data->sig = SIGTRAP; break;
169 /* line 1010 emulator */
170 case 10: abfd->tdata.cisco_core_data->sig = SIGILL; break;
171 /* line 1111 emulator */
172 case 11: abfd->tdata.cisco_core_data->sig = SIGILL; break;
174 /* Coprocessor protocol violation. Using a standard MMU or FPU
175 this cannot be triggered by software. Call it a SIGBUS. */
176 case 13: abfd->tdata.cisco_core_data->sig = SIGBUS; break;
179 case 31: abfd->tdata.cisco_core_data->sig = SIGINT; break;
181 case 33: abfd->tdata.cisco_core_data->sig = SIGTRAP; break;
183 /* floating point err */
184 case 48: abfd->tdata.cisco_core_data->sig = SIGFPE; break;
185 /* floating point err */
186 case 49: abfd->tdata.cisco_core_data->sig = SIGFPE; break;
188 case 50: abfd->tdata.cisco_core_data->sig = SIGFPE; break;
190 case 51: abfd->tdata.cisco_core_data->sig = SIGFPE; break;
192 case 52: abfd->tdata.cisco_core_data->sig = SIGFPE; break;
194 case 53: abfd->tdata.cisco_core_data->sig = SIGFPE; break;
196 case 54: abfd->tdata.cisco_core_data->sig = SIGFPE; break;
199 #define SIGEMT SIGTRAP
201 /* "software generated"*/
202 abfd->tdata.cisco_core_data->sig = SIGEMT;
206 /* Unknown crash reason. */
207 abfd->tdata.cisco_core_data->sig = 0;
211 abfd->sections = NULL;
212 abfd->section_count = 0;
214 asect = (asection *) bfd_zmalloc (sizeof (asection));
217 asect->name = ".reg";
218 asect->flags = SEC_HAS_CONTENTS;
219 /* This can be bigger than the real size. Set it to the size of the whole
221 asect->_raw_size = statbuf.st_size;
223 asect->filepos = bfd_get_32 (abfd, crashinfo.registers) - rambase;
224 asect->next = abfd->sections;
225 abfd->sections = asect;
226 ++abfd->section_count;
228 /* There is only one section containing data from the target system's RAM.
230 asect = (asection *) bfd_zmalloc (sizeof (asection));
233 asect->name = ".data";
234 asect->flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS;
235 /* The size of memory is the size of the core file itself. */
236 asect->_raw_size = statbuf.st_size;
237 asect->vma = rambase;
239 asect->next = abfd->sections;
240 abfd->sections = asect;
241 ++abfd->section_count;
248 for (asect = abfd->sections; asect != NULL;)
250 nextsect = asect->next;
254 free (abfd->tdata.cisco_core_data);
260 cisco_core_file_failing_command (abfd)
267 cisco_core_file_failing_signal (abfd)
270 return abfd->tdata.cisco_core_data->sig;
274 cisco_core_file_matches_executable_p (core_bfd, exec_bfd)
281 const bfd_target cisco_core_vec =
284 bfd_target_unknown_flavour,
285 BFD_ENDIAN_BIG, /* target byte order */
286 BFD_ENDIAN_BIG, /* target headers byte order */
287 (HAS_RELOC | EXEC_P | /* object flags */
288 HAS_LINENO | HAS_DEBUG |
289 HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
290 (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
291 0, /* symbol prefix */
292 ' ', /* ar_pad_char */
293 16, /* ar_max_namelen */
294 bfd_getb64, bfd_getb_signed_64, bfd_putb64,
295 bfd_getb32, bfd_getb_signed_32, bfd_putb32,
296 bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* data */
297 bfd_getb64, bfd_getb_signed_64, bfd_putb64,
298 bfd_getb32, bfd_getb_signed_32, bfd_putb32,
299 bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* hdrs */
301 { /* bfd_check_format */
302 _bfd_dummy_target, /* unknown format */
303 _bfd_dummy_target, /* object file */
304 _bfd_dummy_target, /* archive */
305 cisco_core_file_p /* a core file */
307 { /* bfd_set_format */
308 bfd_false, bfd_false,
311 { /* bfd_write_contents */
312 bfd_false, bfd_false,
316 BFD_JUMP_TABLE_GENERIC (_bfd_generic),
317 BFD_JUMP_TABLE_COPY (_bfd_generic),
318 BFD_JUMP_TABLE_CORE (cisco),
319 BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
320 BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
321 BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
322 BFD_JUMP_TABLE_WRITE (_bfd_generic),
323 BFD_JUMP_TABLE_LINK (_bfd_nolink),
324 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
326 (PTR) 0 /* backend_data */