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252b5132 | 1 | /* BFD back end for SCO5 core files (U-area and raw sections) |
dc810e39 | 2 | Copyright 1998, 1999, 2000, 2001 Free Software Foundation, Inc. |
252b5132 RH |
3 | Written by Jouke Numan <jnuman@hiscom.nl> |
4 | ||
5 | This file is part of BFD, the Binary File Descriptor library. | |
6 | ||
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. | |
11 | ||
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. | |
16 | ||
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. */ | |
20 | ||
21 | #include "bfd.h" | |
22 | #include "sysdep.h" | |
23 | #include "libbfd.h" | |
24 | #include "libaout.h" /* BFD a.out internal data structures */ | |
25 | ||
26 | #include <stdio.h> | |
27 | #include <sys/types.h> | |
28 | #include <sys/param.h> | |
29 | #include <sys/dir.h> | |
30 | #include <signal.h> | |
31 | ||
32 | #include <sys/user.h> /* After a.out.h */ | |
33 | #include <sys/paccess.h> | |
34 | #include <sys/region.h> | |
35 | ||
36 | struct sco5_core_struct | |
37 | { | |
38 | struct user u; | |
39 | }; | |
40 | ||
41 | /* forward declarations */ | |
42 | ||
43 | static asection * | |
44 | make_bfd_asection PARAMS ((bfd *, const char *, flagword, bfd_size_type, | |
45 | bfd_vma, file_ptr)); | |
46 | static asymbol *sco5_core_make_empty_symbol PARAMS ((bfd *)); | |
47 | static struct user *read_uarea PARAMS ((bfd *, int)); | |
48 | const bfd_target *sco5_core_file_p PARAMS ((bfd *abfd)); | |
49 | char *sco5_core_file_failing_command PARAMS ((bfd *abfd)); | |
50 | int sco5_core_file_failing_signal PARAMS ((bfd *abfd)); | |
51 | boolean sco5_core_file_matches_executable_p PARAMS ((bfd *core_bfd, | |
52 | bfd *exec_bfd)); | |
53 | static void swap_abort PARAMS ((void)); | |
54 | ||
55 | static asection * | |
56 | make_bfd_asection (abfd, name, flags, _raw_size, vma, filepos) | |
57 | bfd *abfd; | |
58 | const char *name; | |
59 | flagword flags; | |
60 | bfd_size_type _raw_size; | |
61 | bfd_vma vma; | |
62 | file_ptr filepos; | |
63 | { | |
64 | asection *asect; | |
65 | ||
66 | asect = bfd_make_section_anyway (abfd, name); | |
67 | if (!asect) | |
68 | return NULL; | |
69 | asect->flags = flags; | |
70 | asect->_raw_size = _raw_size; | |
71 | asect->vma = vma; | |
72 | asect->filepos = filepos; | |
73 | asect->alignment_power = 2; | |
74 | ||
75 | return asect; | |
76 | } | |
77 | ||
78 | static asymbol * | |
79 | sco5_core_make_empty_symbol (abfd) | |
80 | bfd *abfd; | |
81 | { | |
dc810e39 AM |
82 | asymbol *new; |
83 | ||
84 | new = (asymbol *) bfd_zalloc (abfd, (bfd_size_type) sizeof (asymbol)); | |
252b5132 RH |
85 | if (new) |
86 | new->the_bfd = abfd; | |
87 | return new; | |
88 | } | |
7b82c249 | 89 | |
252b5132 RH |
90 | static struct user * |
91 | read_uarea(abfd, filepos) | |
92 | bfd *abfd; | |
93 | int filepos; | |
94 | ||
95 | { | |
96 | struct sco5_core_struct *rawptr; | |
dc810e39 | 97 | bfd_size_type amt = sizeof (struct sco5_core_struct); |
252b5132 | 98 | |
dc810e39 | 99 | rawptr = (struct sco5_core_struct *) bfd_zmalloc (amt); |
252b5132 RH |
100 | if (rawptr == NULL) |
101 | return NULL; | |
102 | ||
103 | abfd->tdata.sco5_core_data = rawptr; | |
104 | ||
dc810e39 AM |
105 | if (bfd_seek (abfd, (file_ptr) filepos, SEEK_SET) != 0 |
106 | || bfd_bread ((void *) &rawptr->u, (bfd_size_type) sizeof rawptr->u, | |
107 | abfd) != sizeof rawptr->u) | |
252b5132 RH |
108 | { |
109 | bfd_set_error (bfd_error_wrong_format); | |
110 | return NULL; | |
111 | } | |
112 | ||
113 | /* Sanity check perhaps??? */ | |
7b82c249 | 114 | if (rawptr->u.u_dsize > 0x1000000) /* Remember, it's in pages... */ |
252b5132 RH |
115 | { |
116 | bfd_set_error (bfd_error_wrong_format); | |
117 | return NULL; | |
118 | } | |
119 | if (rawptr->u.u_ssize > 0x1000000) | |
120 | { | |
121 | bfd_set_error (bfd_error_wrong_format); | |
122 | return NULL; | |
123 | } | |
124 | return &rawptr->u; | |
125 | } | |
126 | ||
127 | /* ARGSUSED */ | |
128 | const bfd_target * | |
129 | sco5_core_file_p (abfd) | |
130 | bfd *abfd; | |
131 | { | |
132 | int coffset_siz, val, nsecs, cheadoffs; | |
133 | int coresize; | |
134 | struct user *u; | |
135 | struct coreoffsets coffsets; | |
136 | struct coresecthead chead; | |
137 | char *secname; | |
138 | flagword flags; | |
139 | ||
140 | /* Read coreoffsets region at end of core (see core(FP)) */ | |
141 | ||
142 | { | |
143 | FILE *stream = bfd_cache_lookup (abfd); | |
144 | struct stat statbuf; | |
145 | if (stream == NULL) | |
146 | return NULL; | |
147 | if (fstat (fileno (stream), &statbuf) < 0) | |
148 | { | |
149 | bfd_set_error (bfd_error_system_call); | |
150 | return NULL; | |
151 | } | |
152 | coresize = statbuf.st_size; | |
153 | } | |
154 | /* Last long in core is sizeof struct coreoffsets, read it */ | |
dc810e39 AM |
155 | if ((bfd_seek (abfd, (file_ptr) (coresize - sizeof coffset_siz), |
156 | SEEK_SET) != 0) | |
157 | || bfd_bread ((void *) &coffset_siz, (bfd_size_type) sizeof coffset_siz, | |
158 | abfd) != sizeof coffset_siz) | |
252b5132 | 159 | { |
7b82c249 | 160 | bfd_set_error (bfd_error_wrong_format); |
252b5132 RH |
161 | return NULL; |
162 | } | |
163 | ||
164 | /* Use it to seek start of coreoffsets region, read it and determine | |
165 | validity */ | |
dc810e39 AM |
166 | if ((bfd_seek (abfd, (file_ptr) (coresize - coffset_siz), SEEK_SET) != 0) |
167 | || (bfd_bread ((void *) &coffsets, (bfd_size_type) sizeof coffsets, abfd) | |
252b5132 RH |
168 | != sizeof coffsets) |
169 | || ((coffsets.u_info != 1) && (coffsets.u_info != C_VERSION))) | |
170 | { | |
7b82c249 | 171 | bfd_set_error (bfd_error_wrong_format); |
252b5132 RH |
172 | return NULL; |
173 | } | |
174 | ||
7b82c249 KH |
175 | if (coffsets.u_info == 1) |
176 | { | |
252b5132 RH |
177 | /* Old version, no section heads, read info from user struct */ |
178 | ||
179 | u = read_uarea(abfd, coffsets.u_user); | |
180 | if (! u) | |
181 | return NULL; | |
182 | ||
7b82c249 | 183 | if (!make_bfd_asection (abfd, ".reg", SEC_HAS_CONTENTS, |
252b5132 RH |
184 | (bfd_size_type) coffsets.u_usize, |
185 | 0 - (bfd_vma) u->u_ar0, | |
186 | (file_ptr) coffsets.u_user)) | |
187 | return NULL; | |
7b82c249 KH |
188 | |
189 | if (!make_bfd_asection (abfd, ".data", | |
252b5132 RH |
190 | SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS, |
191 | ((bfd_size_type) u->u_exdata.ux_dsize | |
192 | + u->u_exdata.ux_bsize), | |
193 | (bfd_vma) u->u_exdata.ux_datorg, | |
194 | (file_ptr) coffsets.u_data)) | |
195 | return NULL; | |
7b82c249 KH |
196 | |
197 | if (!make_bfd_asection (abfd, ".stack", | |
198 | SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS, | |
252b5132 RH |
199 | (bfd_size_type) u->u_ssize * NBPC, |
200 | (bfd_vma) u->u_sub, | |
201 | (file_ptr) coffsets.u_stack)) | |
202 | return NULL; | |
203 | ||
204 | return abfd->xvec; /* Done for version 1 */ | |
7b82c249 | 205 | } |
252b5132 RH |
206 | |
207 | /* Immediately before coreoffsets region is a long with offset in core | |
208 | to first coresecthead (CORES_OFFSETS), the long before this is the | |
209 | number of section heads in the list. Read both longs and read the | |
210 | coresecthead and check its validity */ | |
7b82c249 KH |
211 | |
212 | if ((bfd_seek (abfd, | |
dc810e39 | 213 | (file_ptr) (coresize - coffset_siz - 2 * sizeof coffset_siz), |
252b5132 | 214 | SEEK_SET) != 0) |
dc810e39 AM |
215 | || (bfd_bread ((void *) &nsecs, (bfd_size_type) sizeof nsecs, abfd) |
216 | != sizeof nsecs) | |
217 | || (bfd_bread ((void *) &cheadoffs, (bfd_size_type) sizeof cheadoffs, | |
218 | abfd) != sizeof cheadoffs) | |
219 | || (bfd_seek (abfd, (file_ptr) cheadoffs, SEEK_SET) != 0) | |
220 | || (bfd_bread ((void *) &chead, (bfd_size_type) sizeof chead, abfd) | |
221 | != sizeof chead) | |
252b5132 RH |
222 | || (chead.cs_stype != CORES_OFFSETS) |
223 | || (chead.cs_x.csx_magic != COREMAGIC_NUMBER)) | |
224 | { | |
225 | bfd_set_error (bfd_error_wrong_format); | |
226 | return NULL; | |
227 | } | |
228 | ||
229 | /* OK, we believe you. You're a core file (sure, sure). */ | |
230 | ||
231 | /* Now loop over all regions and map them */ | |
232 | nsecs--; /* We've seen CORES_OFFSETS already */ | |
7b82c249 | 233 | for (; nsecs; nsecs--) |
252b5132 | 234 | { |
dc810e39 AM |
235 | if ((bfd_seek (abfd, (file_ptr) chead.cs_hseek, SEEK_SET) != 0) |
236 | || (bfd_bread ((void *) &chead, (bfd_size_type) sizeof chead, abfd) | |
237 | != sizeof chead)) | |
252b5132 | 238 | { |
7b82c249 | 239 | bfd_set_error (bfd_error_wrong_format); |
252b5132 RH |
240 | return NULL; |
241 | } | |
242 | ||
7b82c249 | 243 | switch (chead.cs_stype) |
252b5132 RH |
244 | { |
245 | case CORES_MAGIC: /* Core header, check magic */ | |
246 | if (chead.cs_x.csx_magic != COREMAGIC_NUMBER) | |
247 | { | |
248 | bfd_set_error (bfd_error_wrong_format); | |
249 | return NULL; | |
250 | } | |
251 | secname = NULL; | |
252 | nsecs++; /* MAGIC not in section cnt!*/ | |
253 | break; | |
254 | case CORES_UAREA: /* U-area, read in tdata */ | |
255 | u = read_uarea(abfd, chead.cs_sseek); | |
256 | if (! u) | |
257 | return NULL; | |
258 | ||
259 | /* This is tricky. As the "register section", we give them | |
260 | the entire upage and stack. u.u_ar0 points to where | |
261 | "register 0" is stored. There are two tricks with this, | |
262 | though. One is that the rest of the registers might be | |
263 | at positive or negative (or both) displacements from | |
264 | *u_ar0. The other is that u_ar0 is sometimes an absolute | |
265 | address in kernel memory, and on other systems it is an | |
266 | offset from the beginning of the `struct user'. | |
7b82c249 | 267 | |
252b5132 RH |
268 | As a practical matter, we don't know where the registers |
269 | actually are, so we have to pass the whole area to GDB. | |
270 | We encode the value of u_ar0 by setting the .regs section | |
271 | up so that its virtual memory address 0 is at the place | |
272 | pointed to by u_ar0 (by setting the vma of the start of | |
273 | the section to -u_ar0). GDB uses this info to locate the | |
274 | regs, using minor trickery to get around the | |
7b82c249 | 275 | offset-or-absolute-addr problem. */ |
252b5132 RH |
276 | |
277 | chead.cs_vaddr = 0 - (bfd_vma) u->u_ar0; | |
278 | ||
252b5132 RH |
279 | secname = ".reg"; |
280 | flags = SEC_HAS_CONTENTS; | |
281 | ||
282 | break; | |
283 | case CORES_PREGION: /* A program region, map it */ | |
284 | switch (chead.cs_x.csx_preg.csxp_rtyp) | |
285 | { | |
286 | case PT_DATA: | |
287 | secname = ".data"; /* Data region. */ | |
288 | break; | |
289 | case PT_STACK: | |
290 | secname = ".stack"; /* Stack region. */ | |
291 | break; | |
292 | case PT_SHMEM: | |
293 | secname = ".shmem"; /* Shared memory */ | |
294 | break; | |
295 | case PT_LIBDAT: | |
296 | secname = ".libdat"; /* Shared library data */ | |
297 | break; | |
298 | case PT_V86: | |
299 | secname = ".virt86"; /* Virtual 8086 mode */ | |
300 | break; | |
301 | case PT_SHFIL: | |
302 | secname = ".mmfile"; /* Memory mapped file */ | |
303 | break; | |
304 | case PT_XDATA0: | |
305 | secname = ".Xdat0"; /* XENIX data region, virtual 0 */ | |
306 | break; | |
307 | default: | |
308 | secname = ""; | |
309 | } | |
310 | flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS; | |
311 | break; | |
312 | case CORES_PROC: /* struct proc */ | |
313 | case CORES_ITIMER: /* interval timers */ | |
314 | case CORES_SCOUTSNAME: /* struct scoutsname */ | |
315 | secname = NULL; /* Ignore these */ | |
316 | break; | |
317 | default: | |
318 | (*_bfd_error_handler) ("Unhandled SCO core file section type %d\n", | |
319 | chead.cs_stype); | |
320 | continue; | |
321 | } | |
322 | ||
323 | if (secname | |
324 | && !make_bfd_asection (abfd, secname, flags, | |
325 | (bfd_size_type) chead.cs_vsize, | |
326 | (bfd_vma) chead.cs_vaddr, | |
327 | (file_ptr) chead.cs_sseek)) | |
328 | return NULL; | |
329 | ||
330 | } | |
331 | ||
332 | return abfd->xvec; | |
333 | ||
334 | } | |
335 | ||
336 | char * | |
337 | sco5_core_file_failing_command (abfd) | |
338 | bfd *abfd; | |
339 | { | |
340 | char *com = abfd->tdata.sco5_core_data->u.u_comm; | |
341 | if (*com) | |
342 | return com; | |
343 | else | |
344 | return NULL; | |
345 | } | |
346 | ||
347 | /* ARGSUSED */ | |
348 | int | |
349 | sco5_core_file_failing_signal (ignore_abfd) | |
350 | bfd *ignore_abfd; | |
351 | { | |
7b82c249 KH |
352 | return ((ignore_abfd->tdata.sco5_core_data->u.u_sysabort != 0) |
353 | ? ignore_abfd->tdata.sco5_core_data->u.u_sysabort | |
252b5132 RH |
354 | : -1); |
355 | } | |
356 | ||
357 | /* ARGSUSED */ | |
358 | boolean | |
359 | sco5_core_file_matches_executable_p (core_bfd, exec_bfd) | |
dc810e39 AM |
360 | bfd *core_bfd ATTRIBUTE_UNUSED; |
361 | bfd *exec_bfd ATTRIBUTE_UNUSED; | |
252b5132 RH |
362 | { |
363 | return true; /* FIXME, We have no way of telling at this point */ | |
364 | } | |
365 | ||
366 | #define sco5_core_get_symtab_upper_bound _bfd_nosymbols_get_symtab_upper_bound | |
367 | #define sco5_core_get_symtab _bfd_nosymbols_get_symtab | |
368 | #define sco5_core_print_symbol _bfd_nosymbols_print_symbol | |
369 | #define sco5_core_get_symbol_info _bfd_nosymbols_get_symbol_info | |
370 | #define sco5_core_bfd_is_local_label_name _bfd_nosymbols_bfd_is_local_label_name | |
371 | #define sco5_core_get_lineno _bfd_nosymbols_get_lineno | |
372 | #define sco5_core_find_nearest_line _bfd_nosymbols_find_nearest_line | |
373 | #define sco5_core_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol | |
374 | #define sco5_core_read_minisymbols _bfd_nosymbols_read_minisymbols | |
375 | #define sco5_core_minisymbol_to_symbol _bfd_nosymbols_minisymbol_to_symbol | |
376 | ||
377 | /* If somebody calls any byte-swapping routines, shoot them. */ | |
378 | static void | |
7b82c249 | 379 | swap_abort () |
252b5132 | 380 | { |
7b82c249 | 381 | abort (); /* This way doesn't require any declaration for ANSI to fuck up */ |
252b5132 RH |
382 | } |
383 | #define NO_GET ((bfd_vma (*) PARAMS (( const bfd_byte *))) swap_abort ) | |
384 | #define NO_PUT ((void (*) PARAMS ((bfd_vma, bfd_byte *))) swap_abort ) | |
385 | #define NO_SIGNED_GET \ | |
386 | ((bfd_signed_vma (*) PARAMS ((const bfd_byte *))) swap_abort ) | |
387 | ||
388 | const bfd_target sco5_core_vec = | |
389 | { | |
390 | "sco5-core", | |
391 | bfd_target_unknown_flavour, | |
392 | BFD_ENDIAN_LITTLE, /* target byte order */ | |
393 | BFD_ENDIAN_LITTLE, /* target headers byte order */ | |
394 | (HAS_RELOC | EXEC_P | /* object flags */ | |
395 | HAS_LINENO | HAS_DEBUG | | |
396 | HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED), | |
397 | (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */ | |
398 | 0, /* symbol prefix */ | |
399 | ' ', /* ar_pad_char */ | |
400 | 16, /* ar_max_namelen */ | |
401 | NO_GET, NO_SIGNED_GET, NO_PUT, /* 64 bit data */ | |
402 | NO_GET, NO_SIGNED_GET, NO_PUT, /* 32 bit data */ | |
403 | NO_GET, NO_SIGNED_GET, NO_PUT, /* 16 bit data */ | |
404 | NO_GET, NO_SIGNED_GET, NO_PUT, /* 64 bit hdrs */ | |
405 | NO_GET, NO_SIGNED_GET, NO_PUT, /* 32 bit hdrs */ | |
406 | NO_GET, NO_SIGNED_GET, NO_PUT, /* 16 bit hdrs */ | |
407 | ||
408 | { /* bfd_check_format */ | |
409 | _bfd_dummy_target, /* unknown format */ | |
410 | _bfd_dummy_target, /* object file */ | |
411 | _bfd_dummy_target, /* archive */ | |
412 | sco5_core_file_p /* a core file */ | |
413 | }, | |
414 | { /* bfd_set_format */ | |
415 | bfd_false, bfd_false, | |
416 | bfd_false, bfd_false | |
417 | }, | |
418 | { /* bfd_write_contents */ | |
419 | bfd_false, bfd_false, | |
420 | bfd_false, bfd_false | |
421 | }, | |
422 | ||
423 | BFD_JUMP_TABLE_GENERIC (_bfd_generic), | |
424 | BFD_JUMP_TABLE_COPY (_bfd_generic), | |
425 | BFD_JUMP_TABLE_CORE (sco5), | |
426 | BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive), | |
427 | BFD_JUMP_TABLE_SYMBOLS (sco5_core), | |
428 | BFD_JUMP_TABLE_RELOCS (_bfd_norelocs), | |
429 | BFD_JUMP_TABLE_WRITE (_bfd_generic), | |
430 | BFD_JUMP_TABLE_LINK (_bfd_nolink), | |
431 | BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), | |
432 | ||
c3c89269 | 433 | NULL, |
7b82c249 | 434 | |
252b5132 RH |
435 | (PTR) 0 /* backend_data */ |
436 | }; |