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41abdfbd JG |
1 | /* Execute AIXcoff files, for GDB. |
2 | Copyright (C) 1988, 1989, 1991 Free Software Foundation, Inc. | |
3 | Derived from exec.c. Modified by IBM Corporation. | |
4 | Donated by IBM Corporation and Cygnus Support. | |
5 | ||
6 | This file is part of GDB. | |
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., 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
21 | ||
22 | /* xcoff-exec - deal with executing XCOFF files. */ | |
23 | ||
24 | #include <stdio.h> | |
25 | #include <sys/types.h> | |
26 | #include <sys/param.h> | |
27 | #include <fcntl.h> | |
28 | #include <string.h> | |
29 | #include <ctype.h> | |
30 | #include <sys/stat.h> | |
31 | #include <sys/ldr.h> | |
32 | ||
33 | #include "defs.h" | |
41abdfbd JG |
34 | #include "frame.h" |
35 | #include "inferior.h" | |
36 | #include "target.h" | |
37 | #include "gdbcmd.h" | |
38 | #include "gdbcore.h" | |
39 | #include "symfile.h" | |
40 | ||
41 | #include "libbfd.h" /* BFD internals (sigh!) FIXME */ | |
42 | ||
43 | struct section_table *exec_sections, *exec_sections_end; | |
44 | ||
45 | #define eq(s0, s1) !strcmp(s0, s1) | |
46 | ||
47 | /* Whether to open exec and core files read-only or read-write. */ | |
48 | ||
49 | int write_files = 0; | |
50 | ||
51 | bfd *exec_bfd; /* needed by core.c */ | |
52 | ||
53 | extern char *getenv(); | |
54 | extern void child_create_inferior (), child_attach (); | |
55 | extern void add_syms_addr_command (); | |
56 | extern void symbol_file_command (); | |
57 | static void exec_files_info(); | |
58 | ||
59 | /* | |
60 | * the vmap struct is used to describe the virtual address space of | |
61 | * the target we are manipulating. The first entry is always the "exec" | |
62 | * file. Subsequent entries correspond to other objects that are | |
63 | * mapped into the address space of a process created from the "exec" file. | |
64 | * These are either in response to exec()ing the file, in which case all | |
65 | * shared libraries are loaded, or a "load" system call, followed by the | |
66 | * user's issuance of a "load" command. | |
67 | */ | |
68 | struct vmap { | |
69 | struct vmap *nxt; /* ^ to next in chain */ | |
70 | bfd *bfd; /* BFD for mappable object library */ | |
71 | char *name; /* ^ to object file name */ | |
72 | char *member; /* ^ to member name */ | |
73 | CORE_ADDR tstart; /* virtual addr where member is mapped */ | |
74 | CORE_ADDR tend; /* virtual upper bound of member */ | |
75 | CORE_ADDR tadj; /* heuristically derived adjustment */ | |
76 | CORE_ADDR dstart; /* virtual address of data start */ | |
77 | CORE_ADDR dend; /* vitrual address of data end */ | |
78 | }; | |
79 | ||
80 | ||
81 | struct vmap_and_bfd { | |
82 | bfd *pbfd; | |
83 | struct vmap *pvmap; | |
84 | }; | |
85 | ||
86 | static struct vmap *vmap; /* current vmap */ | |
87 | ||
88 | extern struct target_ops exec_ops; | |
89 | ||
90 | ||
91 | /* exec_close - done with exec file, clean up all resources. */ | |
92 | ||
93 | void | |
94 | exec_close(quitting) { | |
95 | register struct vmap *vp, *nxt; | |
96 | ||
97 | for (nxt = vmap; vp = nxt; ) { | |
98 | nxt = vp->nxt; | |
99 | bfd_close(vp->bfd); | |
100 | free_named_symtabs(vp->name, vp->member); /* XXX */ | |
101 | free(vp); | |
102 | } | |
103 | ||
104 | vmap = 0; | |
105 | exec_bfd = 0; | |
106 | } | |
107 | ||
108 | /* | |
109 | * exec_file_command - handle the "exec" command, &c. | |
110 | */ | |
111 | void | |
112 | exec_file_command(filename, from_tty) | |
113 | char *filename; | |
114 | { | |
115 | bfd *bfd; | |
116 | ||
117 | target_preopen(from_tty); | |
118 | unpush_target(&exec_ops); | |
119 | ||
120 | /* Now open and digest the file the user requested, if any. */ | |
121 | ||
122 | if (filename) { | |
123 | char *scratch_pathname; | |
124 | int scratch_chan; | |
125 | ||
126 | filename = tilde_expand(filename); | |
127 | make_cleanup(free, filename); | |
128 | ||
129 | scratch_chan = openp(getenv("PATH"), 1, filename, O_RDONLY, 0 | |
130 | , &scratch_pathname); | |
131 | if (scratch_chan < 0) | |
132 | perror_with_name(filename); | |
133 | ||
134 | bfd = bfd_fdopenr(scratch_pathname, NULL, scratch_chan); | |
135 | if (!bfd) | |
136 | error("Could not open `%s' as an executable file: %s" | |
137 | , scratch_pathname, bfd_errmsg(bfd_error)); | |
138 | ||
139 | /* make sure we have an object file */ | |
140 | ||
141 | if (!bfd_check_format(bfd, bfd_object)) | |
142 | error("\"%s\": not in executable format: %s." | |
143 | , scratch_pathname, bfd_errmsg(bfd_error)); | |
144 | ||
145 | ||
146 | /* setup initial vmap */ | |
147 | ||
148 | map_vmap (bfd, 0); | |
149 | if (!vmap) | |
150 | error("Can't find the file sections in `%s': %s" | |
151 | , bfd->filename, bfd_errmsg(bfd_error)); | |
152 | ||
153 | exec_bfd = bfd; | |
154 | ||
155 | if (build_section_table (exec_bfd, &exec_sections, &exec_sections_end)) | |
156 | error ("Can't find the file sections in `%s': %s", | |
157 | exec_bfd->filename, bfd_errmsg (bfd_error)); | |
158 | ||
159 | /* make sure core, if present, matches */ | |
160 | validate_files(); | |
161 | ||
162 | push_target(&exec_ops); | |
163 | ||
164 | /* Tell display code(if any) about the changed file name. */ | |
165 | ||
166 | if (exec_file_display_hook) | |
167 | (*exec_file_display_hook)(filename); | |
168 | } | |
169 | else { | |
170 | exec_close(0); /* just in case */ | |
171 | if (from_tty) | |
172 | printf("No exec file now.\n"); | |
173 | } | |
174 | } | |
175 | ||
176 | /* Set both the exec file and the symbol file, in one command. What a | |
177 | * novelty. Why did GDB go through four major releases before this | |
178 | * command was added? | |
179 | */ | |
180 | void | |
181 | file_command(arg, from_tty) | |
182 | char *arg; { | |
183 | ||
184 | exec_file_command(arg, from_tty); | |
185 | symbol_file_command(arg, from_tty); | |
186 | } | |
187 | ||
188 | /* Locate all mappable sections of a BFD file. | |
189 | table_pp_char is a char * to get it through bfd_map_over_sections; | |
190 | we cast it back to its proper type. */ | |
191 | ||
192 | void | |
193 | add_to_section_table (abfd, asect, table_pp_char) | |
194 | bfd *abfd; | |
195 | sec_ptr asect; | |
196 | char *table_pp_char; | |
197 | { | |
198 | struct section_table **table_pp = (struct section_table **)table_pp_char; | |
199 | flagword aflag; | |
200 | ||
201 | aflag = bfd_get_section_flags (abfd, asect); | |
202 | /* FIXME, we need to handle BSS segment here...it alloc's but doesn't load */ | |
203 | if (!(aflag & SEC_LOAD)) | |
204 | return; | |
205 | (*table_pp)->sec_ptr = asect; | |
206 | (*table_pp)->addr = bfd_section_vma (abfd, asect); | |
207 | (*table_pp)->endaddr = (*table_pp)->addr + bfd_section_size (abfd, asect); | |
208 | (*table_pp)++; | |
209 | } | |
210 | ||
211 | int | |
212 | build_section_table (some_bfd, start, end) | |
213 | bfd *some_bfd; | |
214 | struct section_table **start, **end; | |
215 | { | |
216 | unsigned count; | |
217 | ||
218 | count = bfd_count_sections (some_bfd); | |
219 | if (count == 0) | |
220 | abort(); /* return 1? */ | |
221 | if (*start) | |
222 | free (*start); | |
223 | *start = (struct section_table *) xmalloc (count * sizeof (**start)); | |
224 | *end = *start; | |
225 | bfd_map_over_sections (some_bfd, add_to_section_table, (char *)end); | |
226 | if (*end > *start + count) | |
227 | abort(); | |
228 | /* We could realloc the table, but it probably loses for most files. */ | |
229 | return 0; | |
230 | } | |
231 | ||
232 | /* | |
233 | * lookup_symtab_bfd - find if we currently have any symbol tables from bfd | |
234 | */ | |
235 | struct objfile * | |
236 | lookup_objfile_bfd(bfd *bfd) { | |
237 | register struct objfile *s; | |
238 | ||
239 | for (s = object_files; s; s = s->next) | |
240 | if (s->obfd == bfd) | |
241 | return s; | |
242 | return 0; | |
243 | } | |
244 | ||
245 | ||
246 | void | |
247 | sex_to_vmap(bfd *bf, sec_ptr sex, struct vmap_and_bfd *vmap_bfd) | |
248 | { | |
249 | register struct vmap *vp, **vpp; | |
250 | register struct symtab *syms; | |
251 | bfd *arch = vmap_bfd->pbfd; | |
252 | vp = vmap_bfd->pvmap; | |
253 | ||
254 | if ((bfd_get_section_flags(bf, sex) & SEC_LOAD) == 0) | |
255 | return; | |
256 | ||
257 | if (!strcmp(bfd_section_name(bf, sex), ".text")) { | |
258 | vp->tstart = 0; | |
259 | vp->tend = vp->tstart + bfd_section_size(bf, sex); | |
260 | ||
261 | /* This is quite a tacky way to recognize the `exec' load segment (rather | |
262 | than shared libraries. You should use `arch' instead. FIXMEmgo */ | |
263 | if (!vmap) | |
264 | vp->tadj = sex->filepos - bfd_section_vma(bf, sex); | |
265 | else | |
266 | vp->tadj = 0; | |
267 | } | |
268 | ||
269 | else if (!strcmp(bfd_section_name(bf, sex), ".data")) { | |
270 | vp->dstart = 0; | |
271 | vp->dend = vp->dstart + bfd_section_size(bf, sex); | |
272 | } | |
273 | ||
274 | else if (!strcmp(bfd_section_name(bf, sex), ".bss")) /* FIXMEmgo */ | |
275 | printf ("bss section in exec! Don't know what the heck to do!\n"); | |
276 | } | |
277 | ||
278 | /* Make a vmap for the BFD "bf", which might be a member of the archive | |
279 | BFD "arch". If we have not yet read in symbols for this file, do so. */ | |
280 | ||
281 | map_vmap (bfd *bf, bfd *arch) | |
282 | { | |
283 | struct vmap_and_bfd vmap_bfd; | |
284 | struct vmap *vp, **vpp; | |
285 | struct objfile *obj; | |
286 | char *name; | |
287 | ||
288 | vp = (void*) xmalloc (sizeof (*vp)); | |
289 | vp->nxt = 0; | |
290 | vp->bfd = bf; | |
291 | vp->name = bfd_get_filename(arch ? arch : bf); | |
292 | vp->member = arch ? bfd_get_filename(bf) : ""; | |
293 | ||
294 | vmap_bfd.pbfd = arch; | |
295 | vmap_bfd.pvmap = vp; | |
296 | bfd_map_over_sections (bf, sex_to_vmap, &vmap_bfd); | |
297 | ||
298 | obj = lookup_objfile_bfd (bf); | |
299 | if (exec_bfd && !obj) { | |
300 | name = savestring (bfd_get_filename (bf), strlen (bfd_get_filename (bf))); | |
301 | obj = allocate_objfile (bf, name); | |
4369a140 | 302 | syms_from_objfile (obj, 0, 0, 0); |
41abdfbd JG |
303 | } |
304 | ||
305 | /* find the end of the list, and append. */ | |
306 | for (vpp = &vmap; *vpp; vpp = &(*vpp)->nxt) | |
307 | ; | |
308 | *vpp = vp; | |
309 | } | |
310 | ||
311 | ||
312 | /* true, if symbol table and misc_function_vector is relocated. */ | |
313 | ||
314 | int symtab_relocated = 0; | |
315 | ||
316 | ||
317 | /* vmap_symtab - handle symbol translation on vmapping */ | |
318 | ||
319 | vmap_symtab(vp, old_start, vip) | |
320 | register struct vmap *vp; | |
321 | CORE_ADDR old_start; | |
322 | struct stat *vip; | |
323 | { | |
324 | register struct symtab *s; | |
325 | ||
326 | /* | |
327 | * for each symbol table generated from the vp->bfd | |
328 | */ | |
329 | for (s = symtab_list; s; s = s->next) { | |
330 | ||
331 | /* skip over if this is not relocatable and doesn't have a line table */ | |
332 | if (s->nonreloc && !LINETABLE (s)) | |
333 | continue; | |
334 | ||
335 | /* matching the symbol table's BFD and the *vp's BFD is hairy. | |
336 | exec_file creates a seperate BFD for possibly the | |
337 | same file as symbol_file.FIXME ALL THIS MUST BE RECTIFIED. */ | |
338 | ||
339 | if (s->objfile->obfd == vp->bfd) { | |
340 | /* if they match, we luck out. */ | |
341 | ; | |
342 | } else if (vp->member[0]) { | |
343 | /* no match, and member present, not this one. */ | |
344 | continue; | |
345 | } else { | |
346 | struct stat si; | |
347 | FILE *io; | |
348 | ||
349 | /* | |
350 | * no match, and no member. need to be sure. | |
351 | */ | |
352 | io = bfd_cache_lookup(s->objfile->obfd); | |
353 | if (!io) | |
354 | fatal("cannot find BFD's iostream for sym"); | |
355 | /* | |
356 | * see if we are referring to the same file | |
357 | */ | |
358 | if (fstat(fileno(io), &si) < 0) | |
359 | fatal("cannot fstat BFD for sym"); | |
360 | ||
361 | if (si.st_dev != vip->st_dev | |
362 | || si.st_ino != vip->st_ino) | |
363 | continue; | |
364 | } | |
365 | ||
366 | if (vp->tstart != old_start) | |
367 | vmap_symtab_1(s, vp, old_start); | |
368 | } | |
369 | ||
370 | if (vp->tstart != old_start) | |
371 | fixup_misc_vector (vp->tstart - old_start); | |
372 | ||
373 | symtab_relocated = 1; | |
374 | } | |
375 | ||
376 | ||
377 | fixup_misc_vector (int disp) | |
378 | { | |
379 | int ii; | |
380 | for (ii=0; ii < misc_function_count; ++ii) | |
381 | if (misc_function_vector[ii].address < 0x10000000) | |
382 | misc_function_vector[ii].address += disp; | |
383 | } | |
384 | ||
385 | ||
386 | vmap_symtab_1(s, vp, old_start) | |
387 | register struct symtab *s; | |
388 | register struct vmap *vp; | |
389 | CORE_ADDR old_start; | |
390 | { | |
391 | register int i, j; | |
392 | int len, blen; | |
393 | register struct linetable *l; | |
394 | struct blockvector *bv; | |
395 | register struct block *b; | |
396 | int depth; | |
397 | register ulong reloc, dreloc; | |
398 | ||
399 | if ((reloc = vp->tstart - old_start) == 0) | |
400 | return; | |
401 | ||
402 | dreloc = vp->dstart; /* data relocation */ | |
403 | ||
404 | /* | |
405 | * The line table must be relocated. This is only present for | |
406 | * b.text sections, so only vp->text type maps need be considered. | |
407 | */ | |
408 | l = LINETABLE (s); | |
409 | len = l->nitems; | |
410 | for (i = 0; i < len; i++) | |
411 | l->item[i].pc += reloc; | |
412 | ||
413 | /* if this symbol table is not relocatable, only line table should | |
414 | be relocated and the rest ignored. */ | |
415 | if (s->nonreloc) | |
416 | return; | |
417 | ||
418 | bv = BLOCKVECTOR(s); | |
419 | len = BLOCKVECTOR_NBLOCKS(bv); | |
420 | ||
421 | for (i = 0; i < len; i++) { | |
422 | b = BLOCKVECTOR_BLOCK(bv, i); | |
423 | ||
424 | BLOCK_START(b) += reloc; | |
425 | BLOCK_END(b) += reloc; | |
426 | ||
427 | blen = BLOCK_NSYMS(b); | |
428 | for (j = 0; j < blen; j++) { | |
429 | register struct symbol *sym; | |
430 | ||
431 | sym = BLOCK_SYM(b, j); | |
432 | switch (SYMBOL_NAMESPACE(sym)) { | |
433 | case STRUCT_NAMESPACE: | |
434 | case UNDEF_NAMESPACE: | |
435 | continue; | |
436 | ||
437 | case LABEL_NAMESPACE: | |
438 | case VAR_NAMESPACE: | |
439 | break; | |
440 | } | |
441 | ||
442 | switch (SYMBOL_CLASS(sym)) { | |
443 | case LOC_CONST: | |
444 | case LOC_CONST_BYTES: | |
445 | case LOC_LOCAL: | |
446 | case LOC_REGISTER: | |
447 | case LOC_ARG: | |
448 | case LOC_LOCAL_ARG: | |
449 | case LOC_REF_ARG: | |
450 | case LOC_REGPARM: | |
451 | case LOC_TYPEDEF: | |
452 | continue; | |
453 | ||
454 | #ifdef FIXME | |
455 | case LOC_EXTERNAL: | |
456 | #endif | |
457 | case LOC_LABEL: | |
458 | SYMBOL_VALUE_ADDRESS(sym) += reloc; | |
459 | break; | |
460 | ||
461 | case LOC_STATIC: | |
462 | SYMBOL_VALUE_ADDRESS(sym) += dreloc; | |
463 | break; | |
464 | ||
465 | case LOC_BLOCK: | |
466 | break; | |
467 | ||
468 | default: | |
469 | fatal("botched symbol class %x" | |
470 | , SYMBOL_CLASS(sym)); | |
471 | break; | |
472 | } | |
473 | } | |
474 | } | |
475 | } | |
476 | ||
477 | /* | |
478 | * add_vmap - add a new vmap entry based on ldinfo() information | |
479 | */ | |
480 | add_vmap(ldi) | |
481 | register struct ld_info *ldi; { | |
482 | bfd *bfd, *last; | |
483 | register char *mem; | |
484 | ||
485 | mem = ldi->ldinfo_filename + strlen(ldi->ldinfo_filename) + 1; | |
486 | bfd = bfd_fdopenr(ldi->ldinfo_filename, NULL, ldi->ldinfo_fd); | |
487 | if (!bfd) | |
488 | error("Could not open `%s' as an executable file: %s" | |
489 | , ldi->ldinfo_filename, bfd_errmsg(bfd_error)); | |
490 | ||
491 | ||
492 | /* make sure we have an object file */ | |
493 | ||
494 | if (bfd_check_format(bfd, bfd_object)) | |
495 | map_vmap (bfd, 0); | |
496 | ||
497 | else if (bfd_check_format(bfd, bfd_archive)) { | |
498 | last = 0; | |
499 | /* | |
500 | * FIXME??? am I tossing BFDs? bfd? | |
501 | */ | |
502 | while (last = bfd_openr_next_archived_file(bfd, last)) | |
503 | if (eq(mem, last->filename)) | |
504 | break; | |
505 | ||
506 | if (!last) { | |
507 | bfd_close(bfd); | |
508 | /* FIXME -- should be error */ | |
509 | warning("\"%s\": member \"%s\" missing.", | |
510 | bfd->filename, mem); | |
511 | return; | |
512 | } | |
513 | ||
514 | if (!bfd_check_format(last, bfd_object)) { | |
515 | bfd_close(last); /* XXX??? */ | |
516 | goto obj_err; | |
517 | } | |
518 | ||
519 | map_vmap (last, bfd); | |
520 | } | |
521 | else { | |
522 | obj_err: | |
523 | bfd_close(bfd); | |
524 | /* FIXME -- should be error */ | |
525 | warning("\"%s\": not in executable format: %s." | |
526 | , ldi->ldinfo_filename, bfd_errmsg(bfd_error)); | |
527 | return; | |
528 | } | |
529 | } | |
530 | ||
531 | ||
532 | /* As well as symbol tables, exec_sections need relocation. Otherwise after | |
533 | the inferior process terminates, symbol table is relocated but there is | |
534 | no inferior process. Thus, we have to use `exec' bfd, rather than the inferior | |
535 | process's memory space, when lookipng at symbols. | |
536 | `exec_sections' need to be relocated only once though, as long as the exec | |
537 | file was not changed. | |
538 | */ | |
539 | vmap_exec () | |
540 | { | |
541 | static bfd *execbfd; | |
542 | if (execbfd == exec_bfd) | |
543 | return; | |
544 | ||
545 | execbfd = exec_bfd; | |
546 | ||
547 | if (!vmap || !exec_sections) { | |
548 | printf ("WARNING: vmap not found in vmap_exec()!\n"); | |
549 | return; | |
550 | } | |
551 | /* First exec section is `.text', second is `.data'. If this is changed, | |
552 | then this routine will choke. Better you should check section names, | |
553 | FIXMEmgo. */ | |
554 | exec_sections [0].addr += vmap->tstart; | |
555 | exec_sections [0].endaddr += vmap->tstart; | |
556 | exec_sections [1].addr += vmap->dstart; | |
557 | exec_sections [1].endaddr += vmap->dstart; | |
558 | } | |
559 | ||
560 | ||
561 | int | |
562 | text_adjustment (abfd) | |
563 | bfd *abfd; | |
564 | { | |
565 | static bfd *execbfd; | |
566 | static int adjustment; | |
567 | sec_ptr sect; | |
568 | ||
569 | if (exec_bfd == execbfd) | |
570 | return adjustment; | |
571 | ||
572 | sect = bfd_get_section_by_name (abfd, ".text"); | |
573 | if (sect) | |
574 | adjustment = sect->filepos - sect->vma; | |
575 | else | |
576 | adjustment = 0x200; /* just a wild assumption */ | |
577 | ||
578 | return adjustment; | |
579 | } | |
580 | ||
581 | ||
582 | /* | |
583 | * vmap_ldinfo - update VMAP info with ldinfo() information | |
584 | * | |
585 | * Input: | |
586 | * ldi - ^ to ldinfo() results. | |
587 | */ | |
588 | vmap_ldinfo(ldi) | |
589 | register struct ld_info *ldi; | |
590 | { | |
591 | struct stat ii, vi; | |
592 | register struct vmap *vp; | |
593 | register got_one, retried; | |
594 | CORE_ADDR ostart; | |
595 | ||
596 | /* | |
597 | * for each *ldi, see if we have a corresponding *vp | |
598 | * if so, update the mapping, and symbol table. | |
599 | * if not, add an entry and symbol table. | |
600 | */ | |
601 | do { | |
602 | char *name = ldi->ldinfo_filename; | |
603 | char *memb = name + strlen(name) + 1; | |
604 | ||
605 | retried = 0; | |
606 | ||
607 | if (fstat(ldi->ldinfo_fd, &ii) < 0) | |
608 | fatal("cannot fstat(%d) on %s" | |
609 | , ldi->ldinfo_fd | |
610 | , name); | |
611 | retry: | |
612 | for (got_one = 0, vp = vmap; vp; vp = vp->nxt) { | |
613 | FILE *io; | |
614 | ||
615 | /* The filenames are not always sufficient to match on. */ | |
616 | if ((name[0] == "/" | |
617 | && !eq(name, vp->name)) | |
618 | || (memb[0] && !eq(memb, vp->member))) | |
619 | continue; | |
620 | ||
621 | /* totally opaque! */ | |
622 | io = bfd_cache_lookup(vp->bfd); | |
623 | if (!io) | |
624 | fatal("cannot find BFD's iostream for %s" | |
625 | , vp->name); | |
626 | ||
627 | /* see if we are referring to the same file */ | |
628 | if (fstat(fileno(io), &vi) < 0) | |
629 | fatal("cannot fstat BFD for %s", vp->name); | |
630 | ||
631 | if (ii.st_dev != vi.st_dev || ii.st_ino != vi.st_ino) | |
632 | continue; | |
633 | ||
634 | if (!retried) | |
635 | close(ldi->ldinfo_fd); | |
636 | ||
637 | ++got_one; | |
638 | ||
639 | /* found a corresponding VMAP. remap! */ | |
640 | ostart = vp->tstart; | |
641 | ||
642 | vp->tstart = ldi->ldinfo_textorg; | |
643 | vp->tend = vp->tstart + ldi->ldinfo_textsize; | |
644 | vp->dstart = ldi->ldinfo_dataorg; | |
645 | vp->dend = vp->dstart + ldi->ldinfo_datasize; | |
646 | ||
647 | if (vp->tadj) { | |
648 | vp->tstart += vp->tadj; | |
649 | vp->tend += vp->tadj; | |
650 | } | |
651 | ||
652 | /* relocate symbol table(s). */ | |
653 | vmap_symtab(vp, ostart, &vi); | |
654 | ||
655 | /* there may be more, so we don't break out of the loop. */ | |
656 | } | |
657 | ||
658 | /* | |
659 | * if there was no matching *vp, we must perforce create | |
660 | * the sucker(s) | |
661 | */ | |
662 | if (!got_one && !retried) { | |
663 | add_vmap(ldi); | |
664 | ++retried; | |
665 | goto retry; | |
666 | } | |
667 | } while (ldi->ldinfo_next | |
668 | && (ldi = (void *) (ldi->ldinfo_next + (char *) ldi))); | |
669 | ||
670 | breakpoint_re_set(); | |
671 | } | |
672 | ||
673 | /* | |
674 | * vmap_inferior - print VMAP info for inferior | |
675 | */ | |
676 | vmap_inferior() { | |
677 | ||
678 | if (inferior_pid == 0) | |
679 | return 0; /* normal processing */ | |
680 | ||
681 | exec_files_info(); | |
682 | ||
683 | return 1; | |
684 | } | |
685 | ||
686 | /* Read or write the exec file. | |
687 | ||
688 | Args are address within exec file, address within gdb address-space, | |
689 | length, and a flag indicating whether to read or write. | |
690 | ||
691 | Result is a length: | |
692 | ||
693 | 0: We cannot handle this address and length. | |
694 | > 0: We have handled N bytes starting at this address. | |
695 | (If N == length, we did it all.) We might be able | |
696 | to handle more bytes beyond this length, but no | |
697 | promises. | |
698 | < 0: We cannot handle this address, but if somebody | |
699 | else handles (-N) bytes, we can start from there. | |
700 | ||
701 | The same routine is used to handle both core and exec files; | |
702 | we just tail-call it with more arguments to select between them. */ | |
703 | ||
704 | int | |
705 | xfer_memory (memaddr, myaddr, len, write, abfd, sections, sections_end) | |
706 | CORE_ADDR memaddr; | |
707 | char *myaddr; | |
708 | int len; | |
709 | int write; | |
710 | bfd *abfd; | |
711 | struct section_table *sections, *sections_end; | |
712 | { | |
713 | boolean res; | |
714 | struct section_table *p; | |
715 | CORE_ADDR nextsectaddr, memend; | |
716 | boolean (*xfer_fn) (); | |
717 | ||
718 | if (len <= 0) | |
719 | abort(); | |
720 | ||
721 | memend = memaddr + len; | |
722 | xfer_fn = write? bfd_set_section_contents: bfd_get_section_contents; | |
723 | nextsectaddr = memend; | |
724 | ||
725 | for (p = sections; p < sections_end; p++) | |
726 | { | |
727 | if (p->addr <= memaddr) | |
728 | if (p->endaddr >= memend) | |
729 | { | |
730 | /* Entire transfer is within this section. */ | |
731 | res = xfer_fn (abfd, p->sec_ptr, myaddr, memaddr - p->addr, len); | |
732 | return (res != false)? len: 0; | |
733 | } | |
734 | else if (p->endaddr <= memaddr) | |
735 | { | |
736 | /* This section ends before the transfer starts. */ | |
737 | continue; | |
738 | } | |
739 | else | |
740 | { | |
741 | /* This section overlaps the transfer. Just do half. */ | |
742 | len = p->endaddr - memaddr; | |
743 | res = xfer_fn (abfd, p->sec_ptr, myaddr, memaddr - p->addr, len); | |
744 | return (res != false)? len: 0; | |
745 | } | |
746 | else if (p->addr < nextsectaddr) | |
747 | nextsectaddr = p->addr; | |
748 | } | |
749 | ||
750 | if (nextsectaddr >= memend) | |
751 | return 0; /* We can't help */ | |
752 | else | |
753 | return - (nextsectaddr - memaddr); /* Next boundary where we can help */ | |
754 | } | |
755 | ||
756 | /* The function called by target_xfer_memory via our target_ops */ | |
757 | ||
758 | int | |
759 | exec_xfer_memory (memaddr, myaddr, len, write) | |
760 | CORE_ADDR memaddr; | |
761 | char *myaddr; | |
762 | int len; | |
763 | int write; | |
764 | { | |
765 | return xfer_memory (memaddr, myaddr, len, write, | |
766 | exec_bfd, exec_sections, exec_sections_end); | |
767 | } | |
768 | ||
769 | /* | |
770 | * exec_files_info - "info files" command processor | |
771 | */ | |
772 | static void | |
773 | exec_files_info() { | |
774 | register struct vmap *vp = vmap; | |
775 | ||
776 | if (!vp) | |
777 | return; | |
778 | ||
779 | printf("\tMapping info for file `%s'.\n", vp->name); | |
780 | printf("\t %8.8s %8.8s %8.8s %s\n" | |
781 | , "start", "end", "section", "file(member)"); | |
782 | ||
783 | for (; vp; vp = vp->nxt) | |
784 | printf("\t0x%8.8x 0x%8.8x %s%s%s%s\n" | |
785 | , vp->tstart | |
786 | , vp->tend | |
787 | , vp->name | |
788 | , *vp->member ? "(" : "" | |
789 | , vp->member | |
790 | , *vp->member ? ")" : ""); | |
791 | } | |
792 | ||
793 | #ifdef DAMON | |
76b28d05 | 794 | /* Damon's implementation of set_section_command! It is based on the sex member |
41abdfbd JG |
795 | (which is a section pointer from vmap) of vmap. |
796 | We will not have multiple vmap entries (one for each section), rather transmit | |
797 | text and data base offsets and fix them at the same time. Elimination of sex | |
798 | entry in vmap make this function obsolute, use the one from exec.c. | |
76b28d05 | 799 | Need further testing!! FIXMEmgo. */ |
41abdfbd JG |
800 | |
801 | static void | |
802 | set_section_command(args, from_tty) | |
803 | char *args; | |
804 | { | |
805 | register struct vmap *vp = vmap; | |
806 | char *secname; | |
807 | unsigned seclen; | |
808 | unsigned long secaddr; | |
809 | char secprint[100]; | |
810 | long offset; | |
811 | ||
812 | if (args == 0) | |
813 | error("Must specify section name and its virtual address"); | |
814 | ||
815 | /* Parse out section name */ | |
816 | for (secname = args; !isspace(*args); args++) | |
817 | ; | |
818 | seclen = args - secname; | |
819 | ||
820 | /* Parse out new virtual address */ | |
821 | secaddr = parse_and_eval_address(args); | |
822 | ||
823 | for (vp = vmap; vp; vp = vp->nxt) { | |
824 | if (!strncmp(secname | |
825 | , bfd_section_name(vp->bfd, vp->sex), seclen) | |
826 | && bfd_section_name(vp->bfd, vp->sex)[seclen] == '\0') { | |
827 | offset = secaddr - vp->tstart; | |
828 | vp->tstart += offset; | |
829 | vp->tend += offset; | |
830 | exec_files_info(); | |
831 | return; | |
832 | } | |
833 | } | |
834 | ||
835 | if (seclen >= sizeof(secprint)) | |
836 | seclen = sizeof(secprint) - 1; | |
837 | strncpy(secprint, secname, seclen); | |
838 | secprint[seclen] = '\0'; | |
839 | error("Section %s not found", secprint); | |
840 | } | |
841 | #else | |
842 | static void | |
843 | set_section_command (args, from_tty) | |
844 | char *args; | |
845 | int from_tty; | |
846 | { | |
847 | struct section_table *p; | |
848 | char *secname; | |
849 | unsigned seclen; | |
850 | unsigned long secaddr; | |
851 | char secprint[100]; | |
852 | long offset; | |
853 | ||
854 | if (args == 0) | |
855 | error ("Must specify section name and its virtual address"); | |
856 | ||
857 | /* Parse out section name */ | |
858 | for (secname = args; !isspace(*args); args++) ; | |
859 | seclen = args - secname; | |
860 | ||
861 | /* Parse out new virtual address */ | |
862 | secaddr = parse_and_eval_address (args); | |
863 | ||
864 | for (p = exec_sections; p < exec_sections_end; p++) { | |
865 | if (!strncmp (secname, bfd_section_name (exec_bfd, p->sec_ptr), seclen) | |
866 | && bfd_section_name (exec_bfd, p->sec_ptr)[seclen] == '\0') { | |
867 | offset = secaddr - p->addr; | |
868 | p->addr += offset; | |
869 | p->endaddr += offset; | |
870 | exec_files_info(); | |
871 | return; | |
872 | } | |
873 | } | |
874 | if (seclen >= sizeof (secprint)) | |
875 | seclen = sizeof (secprint) - 1; | |
876 | strncpy (secprint, secname, seclen); | |
877 | secprint[seclen] = '\0'; | |
878 | error ("Section %s not found", secprint); | |
879 | } | |
880 | ||
881 | #endif /* !DAMON */ | |
882 | ||
883 | struct target_ops exec_ops = { | |
884 | "exec", "Local exec file", | |
885 | "Use an executable file as a target.\n\ | |
886 | Specify the filename of the executable file.", | |
887 | exec_file_command, exec_close, /* open, close */ | |
888 | child_attach, 0, 0, 0, /* attach, detach, resume, wait, */ | |
889 | 0, 0, /* fetch_registers, store_registers, */ | |
890 | 0, 0, 0, /* prepare_to_store, conv_to, conv_from, */ | |
891 | exec_xfer_memory, exec_files_info, | |
892 | 0, 0, /* insert_breakpoint, remove_breakpoint, */ | |
893 | 0, 0, 0, 0, 0, /* terminal stuff */ | |
894 | 0, 0, /* kill, load */ | |
895 | 0, 0, /* call fn, lookup sym */ | |
896 | child_create_inferior, | |
897 | 0, /* mourn_inferior */ | |
898 | file_stratum, 0, /* next */ | |
899 | 0, 1, 0, 0, 0, /* all mem, mem, stack, regs, exec */ | |
900 | 0, 0, /* section pointers */ | |
901 | OPS_MAGIC, /* Always the last thing */ | |
902 | }; | |
903 | ||
904 | ||
905 | void | |
906 | _initialize_exec() | |
907 | { | |
908 | ||
909 | add_com("file", class_files, file_command, | |
910 | "Use FILE as program to be debugged.\n\ | |
911 | It is read for its symbols, for getting the contents of pure memory,\n\ | |
912 | and it is the program executed when you use the `run' command.\n\ | |
913 | If FILE cannot be found as specified, your execution directory path\n\ | |
914 | ($PATH) is searched for a command of that name.\n\ | |
915 | No arg means to have no executable file and no symbols."); | |
916 | ||
917 | add_com("exec-file", class_files, exec_file_command, | |
918 | "Use FILE as program for getting contents of pure memory.\n\ | |
919 | If FILE cannot be found as specified, your execution directory path\n\ | |
920 | is searched for a command of that name.\n\ | |
921 | No arg means have no executable file."); | |
922 | ||
923 | add_com("section", class_files, set_section_command, | |
924 | "Change the base address of section SECTION of the exec file to ADDR.\n\ | |
925 | This can be used if the exec file does not contain section addresses,\n\ | |
926 | (such as in the a.out format), or when the addresses specified in the\n\ | |
927 | file itself are wrong. Each section must be changed separately. The\n\ | |
928 | ``info files'' command lists all the sections and their addresses."); | |
929 | ||
930 | add_target(&exec_ops); | |
931 | } |