]>
Commit | Line | Data |
---|---|---|
252b5132 | 1 | /* BFD back end for traditional Unix core files (U-area and raw sections) |
7442e600 | 2 | Copyright 1988, 89, 91, 92, 93, 94, 95, 96, 98, 1999 |
252b5132 RH |
3 | Free Software Foundation, Inc. |
4 | Written by John Gilmore of Cygnus Support. | |
5 | ||
6 | This file is part of BFD, the Binary File Descriptor library. | |
7 | ||
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 2 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
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. | |
17 | ||
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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
21 | ||
22 | #include "bfd.h" | |
23 | #include "sysdep.h" | |
24 | #include "libbfd.h" | |
25 | #include "libaout.h" /* BFD a.out internal data structures */ | |
26 | ||
27 | #include <sys/param.h> | |
28 | #include <sys/dir.h> | |
29 | #include <signal.h> | |
30 | ||
31 | #include <sys/user.h> /* After a.out.h */ | |
32 | ||
33 | #ifdef TRAD_HEADER | |
34 | #include TRAD_HEADER | |
35 | #endif | |
36 | ||
37 | struct trad_core_struct | |
38 | { | |
39 | asection *data_section; | |
40 | asection *stack_section; | |
41 | asection *reg_section; | |
42 | struct user u; | |
43 | }; | |
44 | ||
45 | #define core_upage(bfd) (&((bfd)->tdata.trad_core_data->u)) | |
46 | #define core_datasec(bfd) ((bfd)->tdata.trad_core_data->data_section) | |
47 | #define core_stacksec(bfd) ((bfd)->tdata.trad_core_data->stack_section) | |
48 | #define core_regsec(bfd) ((bfd)->tdata.trad_core_data->reg_section) | |
49 | ||
50 | /* forward declarations */ | |
51 | ||
52 | const bfd_target *trad_unix_core_file_p PARAMS ((bfd *abfd)); | |
53 | char * trad_unix_core_file_failing_command PARAMS ((bfd *abfd)); | |
54 | int trad_unix_core_file_failing_signal PARAMS ((bfd *abfd)); | |
55 | boolean trad_unix_core_file_matches_executable_p | |
56 | PARAMS ((bfd *core_bfd, bfd *exec_bfd)); | |
57 | static void swap_abort PARAMS ((void)); | |
58 | ||
59 | /* Handle 4.2-style (and perhaps also sysV-style) core dump file. */ | |
60 | ||
61 | /* ARGSUSED */ | |
62 | const bfd_target * | |
63 | trad_unix_core_file_p (abfd) | |
64 | bfd *abfd; | |
65 | ||
66 | { | |
67 | int val; | |
68 | struct user u; | |
69 | struct trad_core_struct *rawptr; | |
70 | ||
71 | #ifdef TRAD_CORE_USER_OFFSET | |
72 | /* If defined, this macro is the file position of the user struct. */ | |
73 | if (bfd_seek (abfd, TRAD_CORE_USER_OFFSET, SEEK_SET) != 0) | |
74 | return 0; | |
75 | #endif | |
76 | ||
77 | val = bfd_read ((void *)&u, 1, sizeof u, abfd); | |
78 | if (val != sizeof u) | |
79 | { | |
80 | /* Too small to be a core file */ | |
81 | bfd_set_error (bfd_error_wrong_format); | |
82 | return 0; | |
83 | } | |
84 | ||
85 | /* Sanity check perhaps??? */ | |
86 | if (u.u_dsize > 0x1000000) /* Remember, it's in pages... */ | |
87 | { | |
88 | bfd_set_error (bfd_error_wrong_format); | |
89 | return 0; | |
90 | } | |
91 | if (u.u_ssize > 0x1000000) | |
92 | { | |
93 | bfd_set_error (bfd_error_wrong_format); | |
94 | return 0; | |
95 | } | |
96 | ||
97 | /* Check that the size claimed is no greater than the file size. */ | |
98 | { | |
99 | FILE *stream = bfd_cache_lookup (abfd); | |
100 | struct stat statbuf; | |
101 | if (stream == NULL) | |
102 | return 0; | |
103 | if (fstat (fileno (stream), &statbuf) < 0) | |
104 | { | |
105 | bfd_set_error (bfd_error_system_call); | |
106 | return 0; | |
107 | } | |
7442e600 | 108 | if ((unsigned long) (NBPG * (UPAGES + u.u_dsize |
252b5132 | 109 | #ifdef TRAD_CORE_DSIZE_INCLUDES_TSIZE |
7442e600 | 110 | - u.u_tsize |
252b5132 | 111 | #endif |
7442e600 ILT |
112 | + u.u_ssize)) |
113 | > (unsigned long) statbuf.st_size) | |
252b5132 RH |
114 | { |
115 | bfd_set_error (bfd_error_file_truncated); | |
116 | return 0; | |
117 | } | |
118 | #ifndef TRAD_CORE_ALLOW_ANY_EXTRA_SIZE | |
7442e600 | 119 | if ((unsigned long) (NBPG * (UPAGES + u.u_dsize + u.u_ssize) |
252b5132 RH |
120 | #ifdef TRAD_CORE_EXTRA_SIZE_ALLOWED |
121 | /* Some systems write the file too big. */ | |
7442e600 | 122 | + TRAD_CORE_EXTRA_SIZE_ALLOWED |
252b5132 | 123 | #endif |
7442e600 ILT |
124 | ) |
125 | < (unsigned long) statbuf.st_size) | |
252b5132 RH |
126 | { |
127 | /* The file is too big. Maybe it's not a core file | |
128 | or we otherwise have bad values for u_dsize and u_ssize). */ | |
129 | bfd_set_error (bfd_error_wrong_format); | |
130 | return 0; | |
131 | } | |
132 | #endif | |
133 | } | |
134 | ||
135 | /* OK, we believe you. You're a core file (sure, sure). */ | |
136 | ||
137 | /* Allocate both the upage and the struct core_data at once, so | |
138 | a single free() will free them both. */ | |
139 | rawptr = (struct trad_core_struct *) | |
140 | bfd_zmalloc (sizeof (struct trad_core_struct)); | |
141 | if (rawptr == NULL) | |
142 | return 0; | |
143 | ||
144 | abfd->tdata.trad_core_data = rawptr; | |
145 | ||
146 | rawptr->u = u; /*Copy the uarea into the tdata part of the bfd */ | |
147 | ||
148 | /* Create the sections. This is raunchy, but bfd_close wants to free | |
149 | them separately. */ | |
150 | ||
151 | core_stacksec(abfd) = (asection *) bfd_zalloc (abfd, sizeof (asection)); | |
152 | if (core_stacksec (abfd) == NULL) | |
153 | return NULL; | |
154 | core_datasec (abfd) = (asection *) bfd_zalloc (abfd, sizeof (asection)); | |
155 | if (core_datasec (abfd) == NULL) | |
156 | return NULL; | |
157 | core_regsec (abfd) = (asection *) bfd_zalloc (abfd, sizeof (asection)); | |
158 | if (core_regsec (abfd) == NULL) | |
159 | return NULL; | |
160 | ||
161 | core_stacksec (abfd)->name = ".stack"; | |
162 | core_datasec (abfd)->name = ".data"; | |
163 | core_regsec (abfd)->name = ".reg"; | |
164 | ||
165 | core_stacksec (abfd)->flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS; | |
166 | core_datasec (abfd)->flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS; | |
167 | core_regsec (abfd)->flags = SEC_HAS_CONTENTS; | |
168 | ||
169 | core_datasec (abfd)->_raw_size = NBPG * u.u_dsize | |
170 | #ifdef TRAD_CORE_DSIZE_INCLUDES_TSIZE | |
171 | - NBPG * u.u_tsize | |
172 | #endif | |
173 | ; | |
174 | core_stacksec (abfd)->_raw_size = NBPG * u.u_ssize; | |
175 | core_regsec (abfd)->_raw_size = NBPG * UPAGES; /* Larger than sizeof struct u */ | |
176 | ||
177 | /* What a hack... we'd like to steal it from the exec file, | |
178 | since the upage does not seem to provide it. FIXME. */ | |
179 | #ifdef HOST_DATA_START_ADDR | |
180 | core_datasec (abfd)->vma = HOST_DATA_START_ADDR; | |
181 | #else | |
182 | core_datasec (abfd)->vma = HOST_TEXT_START_ADDR + (NBPG * u.u_tsize); | |
183 | #endif | |
184 | ||
185 | #ifdef HOST_STACK_START_ADDR | |
186 | core_stacksec (abfd)->vma = HOST_STACK_START_ADDR; | |
187 | #else | |
188 | core_stacksec (abfd)->vma = HOST_STACK_END_ADDR - (NBPG * u.u_ssize); | |
189 | #endif | |
190 | ||
191 | /* This is tricky. As the "register section", we give them the entire | |
192 | upage and stack. u.u_ar0 points to where "register 0" is stored. | |
193 | There are two tricks with this, though. One is that the rest of the | |
194 | registers might be at positive or negative (or both) displacements | |
195 | from *u_ar0. The other is that u_ar0 is sometimes an absolute address | |
196 | in kernel memory, and on other systems it is an offset from the beginning | |
197 | of the `struct user'. | |
198 | ||
199 | As a practical matter, we don't know where the registers actually are, | |
200 | so we have to pass the whole area to GDB. We encode the value of u_ar0 | |
201 | by setting the .regs section up so that its virtual memory address | |
202 | 0 is at the place pointed to by u_ar0 (by setting the vma of the start | |
203 | of the section to -u_ar0). GDB uses this info to locate the regs, | |
204 | using minor trickery to get around the offset-or-absolute-addr problem. */ | |
205 | core_regsec (abfd)->vma = 0 - (bfd_vma) u.u_ar0; | |
206 | ||
207 | core_datasec (abfd)->filepos = NBPG * UPAGES; | |
208 | core_stacksec (abfd)->filepos = (NBPG * UPAGES) + NBPG * u.u_dsize | |
209 | #ifdef TRAD_CORE_DSIZE_INCLUDES_TSIZE | |
210 | - NBPG * u.u_tsize | |
211 | #endif | |
212 | ; | |
213 | core_regsec (abfd)->filepos = 0; /* Register segment is the upage */ | |
214 | ||
215 | /* Align to word at least */ | |
216 | core_stacksec (abfd)->alignment_power = 2; | |
217 | core_datasec (abfd)->alignment_power = 2; | |
218 | core_regsec (abfd)->alignment_power = 2; | |
219 | ||
220 | abfd->sections = core_stacksec (abfd); | |
221 | core_stacksec (abfd)->next = core_datasec (abfd); | |
222 | core_datasec (abfd)->next = core_regsec (abfd); | |
223 | abfd->section_count = 3; | |
224 | ||
225 | return abfd->xvec; | |
226 | } | |
227 | ||
228 | char * | |
229 | trad_unix_core_file_failing_command (abfd) | |
230 | bfd *abfd; | |
231 | { | |
232 | #ifndef NO_CORE_COMMAND | |
233 | char *com = abfd->tdata.trad_core_data->u.u_comm; | |
234 | if (*com) | |
235 | return com; | |
236 | else | |
237 | #endif | |
238 | return 0; | |
239 | } | |
240 | ||
241 | /* ARGSUSED */ | |
242 | int | |
243 | trad_unix_core_file_failing_signal (ignore_abfd) | |
7442e600 | 244 | bfd *ignore_abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
245 | { |
246 | #ifdef TRAD_UNIX_CORE_FILE_FAILING_SIGNAL | |
247 | return TRAD_UNIX_CORE_FILE_FAILING_SIGNAL(ignore_abfd); | |
248 | #else | |
249 | return -1; /* FIXME, where is it? */ | |
250 | #endif | |
251 | } | |
252 | ||
253 | /* ARGSUSED */ | |
254 | boolean | |
255 | trad_unix_core_file_matches_executable_p (core_bfd, exec_bfd) | |
7442e600 ILT |
256 | bfd *core_bfd ATTRIBUTE_UNUSED; |
257 | bfd *exec_bfd ATTRIBUTE_UNUSED; | |
252b5132 RH |
258 | { |
259 | return true; /* FIXME, We have no way of telling at this point */ | |
260 | } | |
261 | \f | |
262 | /* If somebody calls any byte-swapping routines, shoot them. */ | |
263 | static void | |
264 | swap_abort() | |
265 | { | |
266 | abort(); /* This way doesn't require any declaration for ANSI to fuck up */ | |
267 | } | |
268 | #define NO_GET ((bfd_vma (*) PARAMS (( const bfd_byte *))) swap_abort ) | |
269 | #define NO_PUT ((void (*) PARAMS ((bfd_vma, bfd_byte *))) swap_abort ) | |
270 | #define NO_SIGNED_GET \ | |
271 | ((bfd_signed_vma (*) PARAMS ((const bfd_byte *))) swap_abort ) | |
272 | ||
273 | const bfd_target trad_core_vec = | |
274 | { | |
275 | "trad-core", | |
276 | bfd_target_unknown_flavour, | |
277 | BFD_ENDIAN_UNKNOWN, /* target byte order */ | |
278 | BFD_ENDIAN_UNKNOWN, /* target headers byte order */ | |
279 | (HAS_RELOC | EXEC_P | /* object flags */ | |
280 | HAS_LINENO | HAS_DEBUG | | |
281 | HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED), | |
282 | (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */ | |
283 | 0, /* symbol prefix */ | |
284 | ' ', /* ar_pad_char */ | |
285 | 16, /* ar_max_namelen */ | |
286 | NO_GET, NO_SIGNED_GET, NO_PUT, /* 64 bit data */ | |
287 | NO_GET, NO_SIGNED_GET, NO_PUT, /* 32 bit data */ | |
288 | NO_GET, NO_SIGNED_GET, NO_PUT, /* 16 bit data */ | |
289 | NO_GET, NO_SIGNED_GET, NO_PUT, /* 64 bit hdrs */ | |
290 | NO_GET, NO_SIGNED_GET, NO_PUT, /* 32 bit hdrs */ | |
291 | NO_GET, NO_SIGNED_GET, NO_PUT, /* 16 bit hdrs */ | |
292 | ||
293 | { /* bfd_check_format */ | |
294 | _bfd_dummy_target, /* unknown format */ | |
295 | _bfd_dummy_target, /* object file */ | |
296 | _bfd_dummy_target, /* archive */ | |
297 | trad_unix_core_file_p /* a core file */ | |
298 | }, | |
299 | { /* bfd_set_format */ | |
300 | bfd_false, bfd_false, | |
301 | bfd_false, bfd_false | |
302 | }, | |
303 | { /* bfd_write_contents */ | |
304 | bfd_false, bfd_false, | |
305 | bfd_false, bfd_false | |
306 | }, | |
307 | ||
308 | BFD_JUMP_TABLE_GENERIC (_bfd_generic), | |
309 | BFD_JUMP_TABLE_COPY (_bfd_generic), | |
310 | BFD_JUMP_TABLE_CORE (trad_unix), | |
311 | BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive), | |
312 | BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols), | |
313 | BFD_JUMP_TABLE_RELOCS (_bfd_norelocs), | |
314 | BFD_JUMP_TABLE_WRITE (_bfd_generic), | |
315 | BFD_JUMP_TABLE_LINK (_bfd_nolink), | |
316 | BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), | |
317 | ||
c3c89269 NC |
318 | NULL, |
319 | ||
252b5132 RH |
320 | (PTR) 0 /* backend_data */ |
321 | }; |