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cef4c2e7 PS |
1 | /* Handle OSF/1 shared libraries for GDB, the GNU Debugger. |
2 | Copyright 1993 Free Software Foundation, Inc. | |
3 | ||
4 | This file is part of GDB. | |
5 | ||
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with this program; if not, write to the Free Software | |
18 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
19 | ||
20 | /* FIXME: Most of this code could be merged with solib.c by using | |
21 | next_link_map_member and xfer_link_map_member in solib.c. */ | |
22 | ||
23 | #include "defs.h" | |
24 | ||
25 | #include <sys/types.h> | |
26 | #include <signal.h> | |
27 | #include <string.h> | |
28 | #include <fcntl.h> | |
29 | ||
30 | #include "symtab.h" | |
31 | #include "bfd.h" | |
32 | #include "symfile.h" | |
33 | #include "objfiles.h" | |
34 | #include "gdbcore.h" | |
35 | #include "command.h" | |
36 | #include "target.h" | |
37 | #include "frame.h" | |
38 | #include "regex.h" | |
39 | #include "inferior.h" | |
40 | #include "language.h" | |
41 | ||
42 | #define MAX_PATH_SIZE 256 /* FIXME: Should be dynamic */ | |
43 | ||
44 | /* FIXME: This is a terrible hack for shared library support under OSF/1. | |
45 | The main problem is that the needed definitions are not contained in | |
46 | the system header files. | |
47 | The ldr_* routines described in loader(3) would be the way to go here. | |
48 | But they do not work for arbitrary target processes (as documented). */ | |
49 | ||
50 | #ifndef USE_LDR_ROUTINES | |
51 | #define RLD_CONTEXT_ADDRESS 0x3ffc0000000 | |
52 | ||
53 | typedef struct | |
54 | { | |
55 | CORE_ADDR next; | |
56 | CORE_ADDR previous; | |
57 | CORE_ADDR unknown; | |
58 | char *module_name; | |
59 | CORE_ADDR modinfo_addr; | |
60 | } ldr_module_info_t; | |
61 | ||
62 | typedef struct | |
63 | { | |
64 | CORE_ADDR unknown1; | |
65 | CORE_ADDR unknown2; | |
66 | CORE_ADDR head; | |
67 | CORE_ADDR tail; | |
68 | } ldr_context_t; | |
69 | ||
70 | static ldr_context_t ldr_context; | |
71 | #else | |
72 | #include <loader.h> | |
73 | #endif | |
74 | ||
75 | /* Define our own link_map structure. | |
76 | This will help to share code with solib.c. */ | |
77 | ||
78 | struct link_map { | |
79 | CORE_ADDR l_addr; /* address at which object mapped */ | |
80 | char *l_name; /* full name of loaded object */ | |
81 | ldr_module_info_t module_info; /* corresponding module info */ | |
82 | }; | |
83 | ||
84 | #define LM_ADDR(so) ((so) -> lm.l_addr) | |
85 | #define LM_NAME(so) ((so) -> lm.l_name) | |
86 | ||
87 | struct so_list { | |
88 | struct so_list *next; /* next structure in linked list */ | |
89 | struct link_map lm; /* copy of link map from inferior */ | |
90 | struct link_map *lmaddr; /* addr in inferior lm was read from */ | |
91 | CORE_ADDR lmend; /* upper addr bound of mapped object */ | |
92 | char so_name[MAX_PATH_SIZE]; /* shared object lib name (FIXME) */ | |
93 | char symbols_loaded; /* flag: symbols read in yet? */ | |
94 | char from_tty; /* flag: print msgs? */ | |
95 | struct objfile *objfile; /* objfile for loaded lib */ | |
96 | struct section_table *sections; | |
97 | struct section_table *sections_end; | |
98 | struct section_table *textsection; | |
99 | bfd *bfd; | |
100 | }; | |
101 | ||
102 | static struct so_list *so_list_head; /* List of known shared objects */ | |
103 | ||
104 | extern int | |
105 | fdmatch PARAMS ((int, int)); /* In libiberty */ | |
106 | ||
107 | /* Local function prototypes */ | |
108 | ||
109 | static void | |
110 | sharedlibrary_command PARAMS ((char *, int)); | |
111 | ||
112 | static void | |
113 | info_sharedlibrary_command PARAMS ((char *, int)); | |
114 | ||
115 | static int | |
116 | symbol_add_stub PARAMS ((char *)); | |
117 | ||
118 | static struct so_list * | |
119 | find_solib PARAMS ((struct so_list *)); | |
120 | ||
121 | static struct link_map * | |
122 | first_link_map_member PARAMS ((void)); | |
123 | ||
124 | static struct link_map * | |
125 | next_link_map_member PARAMS ((struct so_list *)); | |
126 | ||
127 | static void | |
128 | xfer_link_map_member PARAMS ((struct so_list *, struct link_map *)); | |
129 | ||
130 | static void | |
131 | solib_map_sections PARAMS ((struct so_list *)); | |
132 | ||
133 | void | |
134 | _initialize_solib PARAMS ((void)); | |
135 | ||
136 | /* | |
137 | ||
138 | LOCAL FUNCTION | |
139 | ||
140 | solib_map_sections -- open bfd and build sections for shared lib | |
141 | ||
142 | SYNOPSIS | |
143 | ||
144 | static void solib_map_sections (struct so_list *so) | |
145 | ||
146 | DESCRIPTION | |
147 | ||
148 | Given a pointer to one of the shared objects in our list | |
149 | of mapped objects, use the recorded name to open a bfd | |
150 | descriptor for the object, build a section table, and then | |
151 | relocate all the section addresses by the base address at | |
152 | which the shared object was mapped. | |
153 | ||
154 | FIXMES | |
155 | ||
156 | In most (all?) cases the shared object file name recorded in the | |
157 | dynamic linkage tables will be a fully qualified pathname. For | |
158 | cases where it isn't, do we really mimic the systems search | |
159 | mechanism correctly in the below code (particularly the tilde | |
160 | expansion stuff?). | |
161 | */ | |
162 | ||
163 | static void | |
164 | solib_map_sections (so) | |
165 | struct so_list *so; | |
166 | { | |
167 | char *filename; | |
168 | char *scratch_pathname; | |
169 | int scratch_chan; | |
170 | struct section_table *p; | |
171 | struct cleanup *old_chain; | |
172 | bfd *abfd; | |
173 | ||
174 | filename = tilde_expand (so -> so_name); | |
175 | old_chain = make_cleanup (free, filename); | |
176 | ||
177 | scratch_chan = openp (getenv ("PATH"), 1, filename, O_RDONLY, 0, | |
178 | &scratch_pathname); | |
179 | if (scratch_chan < 0) | |
180 | { | |
181 | scratch_chan = openp (getenv ("LD_LIBRARY_PATH"), 1, filename, | |
182 | O_RDONLY, 0, &scratch_pathname); | |
183 | } | |
184 | if (scratch_chan < 0) | |
185 | { | |
186 | perror_with_name (filename); | |
187 | } | |
188 | /* Leave scratch_pathname allocated. bfd->name will point to it. */ | |
189 | ||
190 | abfd = bfd_fdopenr (scratch_pathname, gnutarget, scratch_chan); | |
191 | if (!abfd) | |
192 | { | |
193 | close (scratch_chan); | |
194 | error ("Could not open `%s' as an executable file: %s", | |
195 | scratch_pathname, bfd_errmsg (bfd_error)); | |
196 | } | |
197 | /* Leave bfd open, core_xfer_memory and "info files" need it. */ | |
198 | so -> bfd = abfd; | |
199 | abfd -> cacheable = true; | |
200 | ||
201 | if (!bfd_check_format (abfd, bfd_object)) | |
202 | { | |
203 | error ("\"%s\": not in executable format: %s.", | |
204 | scratch_pathname, bfd_errmsg (bfd_error)); | |
205 | } | |
206 | if (build_section_table (abfd, &so -> sections, &so -> sections_end)) | |
207 | { | |
208 | error ("Can't find the file sections in `%s': %s", | |
209 | bfd_get_filename (exec_bfd), bfd_errmsg (bfd_error)); | |
210 | } | |
211 | ||
212 | for (p = so -> sections; p < so -> sections_end; p++) | |
213 | { | |
214 | /* Relocate the section binding addresses as recorded in the shared | |
215 | object's file by the base address to which the object was actually | |
216 | mapped. */ | |
217 | p -> addr += (CORE_ADDR) LM_ADDR (so); | |
218 | p -> endaddr += (CORE_ADDR) LM_ADDR (so); | |
219 | so -> lmend = (CORE_ADDR) max (p -> endaddr, so -> lmend); | |
220 | if (STREQ (p -> sec_ptr -> name, ".text")) | |
221 | { | |
222 | so -> textsection = p; | |
223 | } | |
224 | } | |
225 | ||
226 | /* Free the file names, close the file now. */ | |
227 | do_cleanups (old_chain); | |
228 | } | |
229 | ||
230 | /* | |
231 | ||
232 | LOCAL FUNCTION | |
233 | ||
234 | first_link_map_member -- locate first member in dynamic linker's map | |
235 | ||
236 | SYNOPSIS | |
237 | ||
238 | static struct link_map *first_link_map_member (void) | |
239 | ||
240 | DESCRIPTION | |
241 | ||
242 | Read in a copy of the first member in the inferior's dynamic | |
243 | link map from the inferior's dynamic linker structures, and return | |
244 | a pointer to the copy in our address space. | |
245 | */ | |
246 | ||
247 | static struct link_map * | |
248 | first_link_map_member () | |
249 | { | |
250 | struct link_map *lm = NULL; | |
251 | static struct link_map first_lm; | |
252 | ||
253 | #ifdef USE_LDR_ROUTINES | |
254 | ldr_module_t mod_id = LDR_NULL_MODULE; | |
255 | size_t retsize; | |
256 | ||
257 | if (ldr_next_module(inferior_pid, &mod_id) != 0 | |
258 | || mod_id == LDR_NULL_MODULE | |
259 | || ldr_inq_module(inferior_pid, mod_id, | |
260 | &first_lm.module_info, sizeof(ldr_module_info_t), | |
261 | &retsize) != 0) | |
262 | return lm; | |
263 | #else | |
264 | CORE_ADDR ldr_context_addr; | |
265 | ||
266 | if (target_read_memory ((CORE_ADDR) RLD_CONTEXT_ADDRESS, | |
267 | (char *) &ldr_context_addr, | |
268 | sizeof (CORE_ADDR)) != 0 | |
269 | || target_read_memory (ldr_context_addr, | |
270 | (char *) &ldr_context, | |
271 | sizeof (ldr_context_t)) != 0 | |
272 | || target_read_memory ((CORE_ADDR) ldr_context.head, | |
273 | (char *) &first_lm.module_info, | |
274 | sizeof (ldr_module_info_t)) != 0) | |
275 | return lm; | |
276 | #endif | |
277 | ||
278 | lm = &first_lm; | |
279 | ||
280 | /* The first entry is for the main program and should be skipped. */ | |
281 | lm->l_name = NULL; | |
282 | ||
283 | return lm; | |
284 | } | |
285 | ||
286 | static struct link_map * | |
287 | next_link_map_member (so_list_ptr) | |
288 | struct so_list *so_list_ptr; | |
289 | { | |
290 | struct link_map *lm = NULL; | |
291 | static struct link_map next_lm; | |
292 | #ifdef USE_LDR_ROUTINES | |
293 | ldr_module_t mod_id = lm->module_info.lmi_modid; | |
294 | size_t retsize; | |
295 | ||
296 | if (ldr_next_module(inferior_pid, &mod_id) != 0 | |
297 | || mod_id == LDR_NULL_MODULE | |
298 | || ldr_inq_module(inferior_pid, mod_id, | |
299 | &next_lm.module_info, sizeof(ldr_module_info_t), | |
300 | &retsize) != 0) | |
301 | return lm; | |
302 | ||
303 | lm = &next_lm; | |
304 | lm->l_name = lm->module_info.lmi_name; | |
305 | #else | |
306 | CORE_ADDR ldr_context_addr; | |
307 | ||
308 | /* Reread context in case ldr_context.tail was updated. */ | |
309 | ||
310 | if (target_read_memory ((CORE_ADDR) RLD_CONTEXT_ADDRESS, | |
311 | (char *) &ldr_context_addr, | |
312 | sizeof (CORE_ADDR)) != 0 | |
313 | || target_read_memory (ldr_context_addr, | |
314 | (char *) &ldr_context, | |
315 | sizeof (ldr_context_t)) != 0 | |
316 | || so_list_ptr->lm.module_info.modinfo_addr == ldr_context.tail | |
317 | || target_read_memory (so_list_ptr->lm.module_info.next, | |
318 | (char *) &next_lm.module_info, | |
319 | sizeof (ldr_module_info_t)) != 0) | |
320 | return lm; | |
321 | ||
322 | lm = &next_lm; | |
323 | lm->l_name = lm->module_info.module_name; | |
324 | #endif | |
325 | return lm; | |
326 | } | |
327 | ||
328 | static void | |
329 | xfer_link_map_member (so_list_ptr, lm) | |
330 | struct so_list *so_list_ptr; | |
331 | struct link_map *lm; | |
332 | { | |
333 | so_list_ptr->lm = *lm; | |
334 | ||
335 | /* OSF/1 has absolute addresses in shared libraries. */ | |
336 | LM_ADDR (so_list_ptr) = 0; | |
337 | ||
338 | /* There is one entry that has no name (for the inferior executable) | |
339 | since it is not a shared object. */ | |
340 | if (LM_NAME (so_list_ptr) != 0) | |
341 | { | |
342 | ||
343 | #ifdef USE_LDR_ROUTINES | |
344 | int len = strlen (LM_NAME (so_list_ptr) + 1); | |
345 | ||
346 | if (len > MAX_PATH_SIZE) | |
347 | len = MAX_PATH_SIZE; | |
348 | strncpy (so_list_ptr->so_name, LM_NAME (so_list_ptr), MAX_PATH_SIZE); | |
349 | #else | |
350 | if (!target_read_string((CORE_ADDR) LM_NAME (so_list_ptr), | |
351 | so_list_ptr->so_name, MAX_PATH_SIZE - 1)) | |
352 | error ("xfer_link_map_member: Can't read pathname for load map\n"); | |
353 | #endif | |
354 | so_list_ptr->so_name[MAX_PATH_SIZE - 1] = 0; | |
355 | ||
356 | solib_map_sections (so_list_ptr); | |
357 | } | |
358 | } | |
359 | ||
360 | /* | |
361 | ||
362 | LOCAL FUNCTION | |
363 | ||
364 | find_solib -- step through list of shared objects | |
365 | ||
366 | SYNOPSIS | |
367 | ||
368 | struct so_list *find_solib (struct so_list *so_list_ptr) | |
369 | ||
370 | DESCRIPTION | |
371 | ||
372 | This module contains the routine which finds the names of any | |
373 | loaded "images" in the current process. The argument in must be | |
374 | NULL on the first call, and then the returned value must be passed | |
375 | in on subsequent calls. This provides the capability to "step" down | |
376 | the list of loaded objects. On the last object, a NULL value is | |
377 | returned. | |
378 | ||
379 | The arg and return value are "struct link_map" pointers, as defined | |
380 | in <link.h>. | |
381 | */ | |
382 | ||
383 | static struct so_list * | |
384 | find_solib (so_list_ptr) | |
385 | struct so_list *so_list_ptr; /* Last lm or NULL for first one */ | |
386 | { | |
387 | struct so_list *so_list_next = NULL; | |
388 | struct link_map *lm = NULL; | |
389 | struct so_list *new; | |
390 | ||
391 | if (so_list_ptr == NULL) | |
392 | { | |
393 | /* We are setting up for a new scan through the loaded images. */ | |
394 | if ((so_list_next = so_list_head) == NULL) | |
395 | { | |
396 | /* Find the first link map list member. */ | |
397 | lm = first_link_map_member (); | |
398 | } | |
399 | } | |
400 | else | |
401 | { | |
402 | /* We have been called before, and are in the process of walking | |
403 | the shared library list. Advance to the next shared object. */ | |
404 | lm = next_link_map_member (so_list_ptr); | |
405 | so_list_next = so_list_ptr -> next; | |
406 | } | |
407 | if ((so_list_next == NULL) && (lm != NULL)) | |
408 | { | |
409 | /* Get next link map structure from inferior image and build a local | |
410 | abbreviated load_map structure */ | |
411 | new = (struct so_list *) xmalloc (sizeof (struct so_list)); | |
412 | memset ((char *) new, 0, sizeof (struct so_list)); | |
413 | new -> lmaddr = lm; | |
414 | /* Add the new node as the next node in the list, or as the root | |
415 | node if this is the first one. */ | |
416 | if (so_list_ptr != NULL) | |
417 | { | |
418 | so_list_ptr -> next = new; | |
419 | } | |
420 | else | |
421 | { | |
422 | so_list_head = new; | |
423 | } | |
424 | so_list_next = new; | |
425 | xfer_link_map_member (new, lm); | |
426 | } | |
427 | return (so_list_next); | |
428 | } | |
429 | ||
430 | /* A small stub to get us past the arg-passing pinhole of catch_errors. */ | |
431 | ||
432 | static int | |
433 | symbol_add_stub (arg) | |
434 | char *arg; | |
435 | { | |
436 | register struct so_list *so = (struct so_list *) arg; /* catch_errs bogon */ | |
437 | ||
438 | so -> objfile = symbol_file_add (so -> so_name, so -> from_tty, | |
439 | so -> textsection -> addr, | |
440 | 0, 0, 0); | |
441 | return (1); | |
442 | } | |
443 | ||
444 | /* | |
445 | ||
446 | GLOBAL FUNCTION | |
447 | ||
448 | solib_add -- add a shared library file to the symtab and section list | |
449 | ||
450 | SYNOPSIS | |
451 | ||
452 | void solib_add (char *arg_string, int from_tty, | |
453 | struct target_ops *target) | |
454 | ||
455 | DESCRIPTION | |
456 | ||
457 | */ | |
458 | ||
459 | void | |
460 | solib_add (arg_string, from_tty, target) | |
461 | char *arg_string; | |
462 | int from_tty; | |
463 | struct target_ops *target; | |
464 | { | |
465 | register struct so_list *so = NULL; /* link map state variable */ | |
466 | ||
467 | /* Last shared library that we read. */ | |
468 | struct so_list *so_last = NULL; | |
469 | ||
470 | char *re_err; | |
471 | int count; | |
472 | int old; | |
473 | ||
474 | if ((re_err = re_comp (arg_string ? arg_string : ".")) != NULL) | |
475 | { | |
476 | error ("Invalid regexp: %s", re_err); | |
477 | } | |
478 | ||
479 | ||
480 | /* Add the shared library sections to the section table of the | |
481 | specified target, if any. We have to do this before reading the | |
482 | symbol files as symbol_file_add calls reinit_frame_cache and | |
483 | creating a new frame might access memory in the shared library. */ | |
484 | if (target) | |
485 | { | |
486 | /* Count how many new section_table entries there are. */ | |
487 | so = NULL; | |
488 | count = 0; | |
489 | while ((so = find_solib (so)) != NULL) | |
490 | { | |
491 | if (so -> so_name[0]) | |
492 | { | |
493 | count += so -> sections_end - so -> sections; | |
494 | } | |
495 | } | |
496 | ||
497 | if (count) | |
498 | { | |
499 | /* Reallocate the target's section table including the new size. */ | |
500 | if (target -> to_sections) | |
501 | { | |
502 | old = target -> to_sections_end - target -> to_sections; | |
503 | target -> to_sections = (struct section_table *) | |
504 | xrealloc ((char *)target -> to_sections, | |
505 | (sizeof (struct section_table)) * (count + old)); | |
506 | } | |
507 | else | |
508 | { | |
509 | old = 0; | |
510 | target -> to_sections = (struct section_table *) | |
511 | xmalloc ((sizeof (struct section_table)) * count); | |
512 | } | |
513 | target -> to_sections_end = target -> to_sections + (count + old); | |
514 | ||
515 | /* Add these section table entries to the target's table. */ | |
516 | while ((so = find_solib (so)) != NULL) | |
517 | { | |
518 | if (so -> so_name[0]) | |
519 | { | |
520 | count = so -> sections_end - so -> sections; | |
521 | memcpy ((char *) (target -> to_sections + old), | |
522 | so -> sections, | |
523 | (sizeof (struct section_table)) * count); | |
524 | old += count; | |
525 | } | |
526 | } | |
527 | } | |
528 | } | |
529 | ||
530 | /* Now add the symbol files. */ | |
531 | so = NULL; | |
532 | while ((so = find_solib (so)) != NULL) | |
533 | { | |
534 | if (so -> so_name[0] && re_exec (so -> so_name)) | |
535 | { | |
536 | so -> from_tty = from_tty; | |
537 | if (so -> symbols_loaded) | |
538 | { | |
539 | if (from_tty) | |
540 | { | |
541 | printf ("Symbols already loaded for %s\n", so -> so_name); | |
542 | } | |
543 | } | |
544 | else if (catch_errors | |
545 | (symbol_add_stub, (char *) so, | |
546 | "Error while reading shared library symbols:\n", | |
547 | RETURN_MASK_ALL)) | |
548 | { | |
549 | so_last = so; | |
550 | so -> symbols_loaded = 1; | |
551 | } | |
552 | } | |
553 | } | |
554 | } | |
555 | ||
556 | /* | |
557 | ||
558 | LOCAL FUNCTION | |
559 | ||
560 | info_sharedlibrary_command -- code for "info sharedlibrary" | |
561 | ||
562 | SYNOPSIS | |
563 | ||
564 | static void info_sharedlibrary_command () | |
565 | ||
566 | DESCRIPTION | |
567 | ||
568 | Walk through the shared library list and print information | |
569 | about each attached library. | |
570 | */ | |
571 | ||
572 | static void | |
573 | info_sharedlibrary_command (ignore, from_tty) | |
574 | char *ignore; | |
575 | int from_tty; | |
576 | { | |
577 | register struct so_list *so = NULL; /* link map state variable */ | |
578 | int header_done = 0; | |
579 | ||
580 | if (exec_bfd == NULL) | |
581 | { | |
582 | printf ("No exec file.\n"); | |
583 | return; | |
584 | } | |
585 | while ((so = find_solib (so)) != NULL) | |
586 | { | |
587 | if (so -> so_name[0]) | |
588 | { | |
589 | unsigned long txt_start = 0; | |
590 | unsigned long txt_end = 0; | |
591 | ||
592 | if (!header_done) | |
593 | { | |
594 | printf("%-20s%-20s%-12s%s\n", "From", "To", "Syms Read", | |
595 | "Shared Object Library"); | |
596 | header_done++; | |
597 | } | |
598 | if (so -> textsection) | |
599 | { | |
600 | txt_start = (unsigned long) so -> textsection -> addr; | |
601 | txt_end = (unsigned long) so -> textsection -> endaddr; | |
602 | } | |
603 | printf ("%-20s", local_hex_string_custom (txt_start, "08l")); | |
604 | printf ("%-20s", local_hex_string_custom (txt_end, "08l")); | |
605 | printf ("%-12s", so -> symbols_loaded ? "Yes" : "No"); | |
606 | printf ("%s\n", so -> so_name); | |
607 | } | |
608 | } | |
609 | if (so_list_head == NULL) | |
610 | { | |
611 | printf ("No shared libraries loaded at this time.\n"); | |
612 | } | |
613 | } | |
614 | ||
615 | /* | |
616 | ||
617 | GLOBAL FUNCTION | |
618 | ||
619 | solib_address -- check to see if an address is in a shared lib | |
620 | ||
621 | SYNOPSIS | |
622 | ||
623 | int solib_address (CORE_ADDR address) | |
624 | ||
625 | DESCRIPTION | |
626 | ||
627 | Provides a hook for other gdb routines to discover whether or | |
628 | not a particular address is within the mapped address space of | |
629 | a shared library. Any address between the base mapping address | |
630 | and the first address beyond the end of the last mapping, is | |
631 | considered to be within the shared library address space, for | |
632 | our purposes. | |
633 | ||
634 | For example, this routine is called at one point to disable | |
635 | breakpoints which are in shared libraries that are not currently | |
636 | mapped in. | |
637 | */ | |
638 | ||
639 | int | |
640 | solib_address (address) | |
641 | CORE_ADDR address; | |
642 | { | |
643 | register struct so_list *so = 0; /* link map state variable */ | |
644 | ||
645 | while ((so = find_solib (so)) != NULL) | |
646 | { | |
647 | if (so -> so_name[0] && so -> textsection) | |
648 | { | |
649 | if ((address >= (CORE_ADDR) so -> textsection -> addr) && | |
650 | (address < (CORE_ADDR) so -> textsection -> endaddr)) | |
651 | { | |
652 | return (1); | |
653 | } | |
654 | } | |
655 | } | |
656 | return (0); | |
657 | } | |
658 | ||
659 | /* Called by free_all_symtabs */ | |
660 | ||
661 | void | |
662 | clear_solib() | |
663 | { | |
664 | struct so_list *next; | |
665 | char *bfd_filename; | |
666 | ||
667 | while (so_list_head) | |
668 | { | |
669 | if (so_list_head -> sections) | |
670 | { | |
671 | free ((PTR)so_list_head -> sections); | |
672 | } | |
673 | if (so_list_head -> bfd) | |
674 | { | |
675 | bfd_filename = bfd_get_filename (so_list_head -> bfd); | |
676 | bfd_close (so_list_head -> bfd); | |
677 | } | |
678 | else | |
679 | /* This happens for the executable on SVR4. */ | |
680 | bfd_filename = NULL; | |
681 | ||
682 | next = so_list_head -> next; | |
683 | if (bfd_filename) | |
684 | free ((PTR)bfd_filename); | |
685 | free ((PTR)so_list_head); | |
686 | so_list_head = next; | |
687 | } | |
688 | } | |
689 | ||
690 | /* | |
691 | ||
692 | GLOBAL FUNCTION | |
693 | ||
694 | solib_create_inferior_hook -- shared library startup support | |
695 | ||
696 | SYNOPSIS | |
697 | ||
698 | void solib_create_inferior_hook() | |
699 | ||
700 | DESCRIPTION | |
701 | ||
702 | When gdb starts up the inferior, it nurses it along (through the | |
703 | shell) until it is ready to execute it's first instruction. At this | |
704 | point, this function gets called via expansion of the macro | |
705 | SOLIB_CREATE_INFERIOR_HOOK. | |
706 | For a statically bound executable, this first instruction is the | |
707 | one at "_start", or a similar text label. No further processing is | |
708 | needed in that case. | |
709 | For a dynamically bound executable, this first instruction is somewhere | |
710 | in the rld, and the actual user executable is not yet mapped in. | |
711 | We continue the inferior again, rld then maps in the actual user | |
712 | executable and any needed shared libraries and then sends | |
713 | itself a SIGTRAP. | |
714 | At that point we discover the names of all shared libraries and | |
715 | read their symbols in. | |
716 | ||
717 | FIXME | |
718 | ||
719 | This code does not properly handle hitting breakpoints which the | |
720 | user might have set in the rld itself. Proper handling would have | |
721 | to check if the SIGTRAP happened due to a kill call. | |
722 | ||
723 | Also, what if child has exit()ed? Must exit loop somehow. | |
724 | */ | |
725 | ||
726 | void | |
727 | solib_create_inferior_hook() | |
728 | { | |
729 | ||
730 | /* Nothing to do for statically bound executables. */ | |
731 | ||
732 | if (symfile_objfile == 0 || symfile_objfile->ei.entry_file_lowpc == stop_pc) | |
733 | return; | |
734 | ||
735 | /* Now run the target. It will eventually get a SIGTRAP, at | |
736 | which point all of the libraries will have been mapped in and we | |
737 | can go groveling around in the rld structures to find | |
738 | out what we need to know about them. */ | |
739 | ||
740 | clear_proceed_status (); | |
741 | stop_soon_quietly = 1; | |
742 | stop_signal = 0; | |
743 | do | |
744 | { | |
745 | target_resume (inferior_pid, 0, stop_signal); | |
746 | wait_for_inferior (); | |
747 | } | |
748 | while (stop_signal != SIGTRAP); | |
749 | stop_soon_quietly = 0; | |
750 | ||
751 | solib_add ((char *) 0, 0, (struct target_ops *) 0); | |
752 | } | |
753 | ||
754 | ||
755 | /* | |
756 | ||
757 | LOCAL FUNCTION | |
758 | ||
759 | sharedlibrary_command -- handle command to explicitly add library | |
760 | ||
761 | SYNOPSIS | |
762 | ||
763 | static void sharedlibrary_command (char *args, int from_tty) | |
764 | ||
765 | DESCRIPTION | |
766 | ||
767 | */ | |
768 | ||
769 | static void | |
770 | sharedlibrary_command (args, from_tty) | |
771 | char *args; | |
772 | int from_tty; | |
773 | { | |
774 | dont_repeat (); | |
775 | solib_add (args, from_tty, (struct target_ops *) 0); | |
776 | } | |
777 | ||
778 | void | |
779 | _initialize_solib() | |
780 | { | |
781 | ||
782 | add_com ("sharedlibrary", class_files, sharedlibrary_command, | |
783 | "Load shared object library symbols for files matching REGEXP."); | |
784 | add_info ("sharedlibrary", info_sharedlibrary_command, | |
785 | "Status of loaded shared object libraries."); | |
786 | } |