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cef4c2e7 | 1 | /* Handle OSF/1 shared libraries for GDB, the GNU Debugger. |
cef0333e | 2 | Copyright 1993, 1994 Free Software Foundation, Inc. |
cef4c2e7 PS |
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; | |
a71c0593 | 99 | bfd *abfd; |
cef4c2e7 PS |
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 | ||
cef4c2e7 PS |
133 | /* |
134 | ||
135 | LOCAL FUNCTION | |
136 | ||
137 | solib_map_sections -- open bfd and build sections for shared lib | |
138 | ||
139 | SYNOPSIS | |
140 | ||
141 | static void solib_map_sections (struct so_list *so) | |
142 | ||
143 | DESCRIPTION | |
144 | ||
145 | Given a pointer to one of the shared objects in our list | |
146 | of mapped objects, use the recorded name to open a bfd | |
147 | descriptor for the object, build a section table, and then | |
148 | relocate all the section addresses by the base address at | |
149 | which the shared object was mapped. | |
150 | ||
151 | FIXMES | |
152 | ||
153 | In most (all?) cases the shared object file name recorded in the | |
154 | dynamic linkage tables will be a fully qualified pathname. For | |
155 | cases where it isn't, do we really mimic the systems search | |
156 | mechanism correctly in the below code (particularly the tilde | |
157 | expansion stuff?). | |
158 | */ | |
159 | ||
160 | static void | |
161 | solib_map_sections (so) | |
162 | struct so_list *so; | |
163 | { | |
164 | char *filename; | |
165 | char *scratch_pathname; | |
166 | int scratch_chan; | |
167 | struct section_table *p; | |
168 | struct cleanup *old_chain; | |
169 | bfd *abfd; | |
170 | ||
171 | filename = tilde_expand (so -> so_name); | |
172 | old_chain = make_cleanup (free, filename); | |
173 | ||
174 | scratch_chan = openp (getenv ("PATH"), 1, filename, O_RDONLY, 0, | |
175 | &scratch_pathname); | |
176 | if (scratch_chan < 0) | |
177 | { | |
178 | scratch_chan = openp (getenv ("LD_LIBRARY_PATH"), 1, filename, | |
179 | O_RDONLY, 0, &scratch_pathname); | |
180 | } | |
181 | if (scratch_chan < 0) | |
182 | { | |
183 | perror_with_name (filename); | |
184 | } | |
185 | /* Leave scratch_pathname allocated. bfd->name will point to it. */ | |
186 | ||
187 | abfd = bfd_fdopenr (scratch_pathname, gnutarget, scratch_chan); | |
188 | if (!abfd) | |
189 | { | |
190 | close (scratch_chan); | |
191 | error ("Could not open `%s' as an executable file: %s", | |
c4a081e1 | 192 | scratch_pathname, bfd_errmsg (bfd_get_error ())); |
cef4c2e7 PS |
193 | } |
194 | /* Leave bfd open, core_xfer_memory and "info files" need it. */ | |
a71c0593 | 195 | so -> abfd = abfd; |
cef4c2e7 PS |
196 | abfd -> cacheable = true; |
197 | ||
198 | if (!bfd_check_format (abfd, bfd_object)) | |
199 | { | |
200 | error ("\"%s\": not in executable format: %s.", | |
c4a081e1 | 201 | scratch_pathname, bfd_errmsg (bfd_get_error ())); |
cef4c2e7 PS |
202 | } |
203 | if (build_section_table (abfd, &so -> sections, &so -> sections_end)) | |
204 | { | |
205 | error ("Can't find the file sections in `%s': %s", | |
c4a081e1 | 206 | bfd_get_filename (exec_bfd), bfd_errmsg (bfd_get_error ())); |
cef4c2e7 PS |
207 | } |
208 | ||
209 | for (p = so -> sections; p < so -> sections_end; p++) | |
210 | { | |
211 | /* Relocate the section binding addresses as recorded in the shared | |
212 | object's file by the base address to which the object was actually | |
213 | mapped. */ | |
214 | p -> addr += (CORE_ADDR) LM_ADDR (so); | |
215 | p -> endaddr += (CORE_ADDR) LM_ADDR (so); | |
216 | so -> lmend = (CORE_ADDR) max (p -> endaddr, so -> lmend); | |
94d4b713 | 217 | if (STREQ (p -> the_bfd_section -> name, ".text")) |
cef4c2e7 PS |
218 | { |
219 | so -> textsection = p; | |
220 | } | |
221 | } | |
222 | ||
223 | /* Free the file names, close the file now. */ | |
224 | do_cleanups (old_chain); | |
225 | } | |
226 | ||
227 | /* | |
228 | ||
229 | LOCAL FUNCTION | |
230 | ||
231 | first_link_map_member -- locate first member in dynamic linker's map | |
232 | ||
233 | SYNOPSIS | |
234 | ||
235 | static struct link_map *first_link_map_member (void) | |
236 | ||
237 | DESCRIPTION | |
238 | ||
239 | Read in a copy of the first member in the inferior's dynamic | |
240 | link map from the inferior's dynamic linker structures, and return | |
241 | a pointer to the copy in our address space. | |
242 | */ | |
243 | ||
244 | static struct link_map * | |
245 | first_link_map_member () | |
246 | { | |
247 | struct link_map *lm = NULL; | |
248 | static struct link_map first_lm; | |
249 | ||
250 | #ifdef USE_LDR_ROUTINES | |
251 | ldr_module_t mod_id = LDR_NULL_MODULE; | |
252 | size_t retsize; | |
253 | ||
254 | if (ldr_next_module(inferior_pid, &mod_id) != 0 | |
255 | || mod_id == LDR_NULL_MODULE | |
256 | || ldr_inq_module(inferior_pid, mod_id, | |
257 | &first_lm.module_info, sizeof(ldr_module_info_t), | |
258 | &retsize) != 0) | |
259 | return lm; | |
260 | #else | |
261 | CORE_ADDR ldr_context_addr; | |
262 | ||
263 | if (target_read_memory ((CORE_ADDR) RLD_CONTEXT_ADDRESS, | |
264 | (char *) &ldr_context_addr, | |
265 | sizeof (CORE_ADDR)) != 0 | |
266 | || target_read_memory (ldr_context_addr, | |
267 | (char *) &ldr_context, | |
268 | sizeof (ldr_context_t)) != 0 | |
269 | || target_read_memory ((CORE_ADDR) ldr_context.head, | |
270 | (char *) &first_lm.module_info, | |
271 | sizeof (ldr_module_info_t)) != 0) | |
272 | return lm; | |
273 | #endif | |
274 | ||
275 | lm = &first_lm; | |
276 | ||
277 | /* The first entry is for the main program and should be skipped. */ | |
278 | lm->l_name = NULL; | |
279 | ||
280 | return lm; | |
281 | } | |
282 | ||
283 | static struct link_map * | |
284 | next_link_map_member (so_list_ptr) | |
285 | struct so_list *so_list_ptr; | |
286 | { | |
287 | struct link_map *lm = NULL; | |
288 | static struct link_map next_lm; | |
289 | #ifdef USE_LDR_ROUTINES | |
290 | ldr_module_t mod_id = lm->module_info.lmi_modid; | |
291 | size_t retsize; | |
292 | ||
293 | if (ldr_next_module(inferior_pid, &mod_id) != 0 | |
294 | || mod_id == LDR_NULL_MODULE | |
295 | || ldr_inq_module(inferior_pid, mod_id, | |
296 | &next_lm.module_info, sizeof(ldr_module_info_t), | |
297 | &retsize) != 0) | |
298 | return lm; | |
299 | ||
300 | lm = &next_lm; | |
301 | lm->l_name = lm->module_info.lmi_name; | |
302 | #else | |
303 | CORE_ADDR ldr_context_addr; | |
304 | ||
305 | /* Reread context in case ldr_context.tail was updated. */ | |
306 | ||
307 | if (target_read_memory ((CORE_ADDR) RLD_CONTEXT_ADDRESS, | |
308 | (char *) &ldr_context_addr, | |
309 | sizeof (CORE_ADDR)) != 0 | |
310 | || target_read_memory (ldr_context_addr, | |
311 | (char *) &ldr_context, | |
312 | sizeof (ldr_context_t)) != 0 | |
313 | || so_list_ptr->lm.module_info.modinfo_addr == ldr_context.tail | |
314 | || target_read_memory (so_list_ptr->lm.module_info.next, | |
315 | (char *) &next_lm.module_info, | |
316 | sizeof (ldr_module_info_t)) != 0) | |
317 | return lm; | |
318 | ||
319 | lm = &next_lm; | |
320 | lm->l_name = lm->module_info.module_name; | |
321 | #endif | |
322 | return lm; | |
323 | } | |
324 | ||
325 | static void | |
326 | xfer_link_map_member (so_list_ptr, lm) | |
327 | struct so_list *so_list_ptr; | |
328 | struct link_map *lm; | |
329 | { | |
330 | so_list_ptr->lm = *lm; | |
331 | ||
332 | /* OSF/1 has absolute addresses in shared libraries. */ | |
333 | LM_ADDR (so_list_ptr) = 0; | |
334 | ||
335 | /* There is one entry that has no name (for the inferior executable) | |
336 | since it is not a shared object. */ | |
337 | if (LM_NAME (so_list_ptr) != 0) | |
338 | { | |
339 | ||
340 | #ifdef USE_LDR_ROUTINES | |
341 | int len = strlen (LM_NAME (so_list_ptr) + 1); | |
342 | ||
343 | if (len > MAX_PATH_SIZE) | |
344 | len = MAX_PATH_SIZE; | |
345 | strncpy (so_list_ptr->so_name, LM_NAME (so_list_ptr), MAX_PATH_SIZE); | |
346 | #else | |
c485c7a9 PS |
347 | int errcode; |
348 | char *buffer; | |
349 | target_read_string ((CORE_ADDR) LM_NAME (so_list_ptr), &buffer, | |
350 | MAX_PATH_SIZE - 1, &errcode); | |
351 | if (errcode != 0) | |
352 | error ("xfer_link_map_member: Can't read pathname for load map: %s\n", | |
353 | safe_strerror (errcode)); | |
354 | strncpy (so_list_ptr->so_name, buffer, MAX_PATH_SIZE - 1); | |
355 | free (buffer); | |
cef4c2e7 | 356 | #endif |
c485c7a9 | 357 | so_list_ptr->so_name[MAX_PATH_SIZE - 1] = '\0'; |
cef4c2e7 PS |
358 | |
359 | solib_map_sections (so_list_ptr); | |
360 | } | |
361 | } | |
362 | ||
363 | /* | |
364 | ||
365 | LOCAL FUNCTION | |
366 | ||
367 | find_solib -- step through list of shared objects | |
368 | ||
369 | SYNOPSIS | |
370 | ||
371 | struct so_list *find_solib (struct so_list *so_list_ptr) | |
372 | ||
373 | DESCRIPTION | |
374 | ||
375 | This module contains the routine which finds the names of any | |
376 | loaded "images" in the current process. The argument in must be | |
377 | NULL on the first call, and then the returned value must be passed | |
378 | in on subsequent calls. This provides the capability to "step" down | |
379 | the list of loaded objects. On the last object, a NULL value is | |
380 | returned. | |
381 | ||
382 | The arg and return value are "struct link_map" pointers, as defined | |
383 | in <link.h>. | |
384 | */ | |
385 | ||
386 | static struct so_list * | |
387 | find_solib (so_list_ptr) | |
388 | struct so_list *so_list_ptr; /* Last lm or NULL for first one */ | |
389 | { | |
390 | struct so_list *so_list_next = NULL; | |
391 | struct link_map *lm = NULL; | |
392 | struct so_list *new; | |
393 | ||
394 | if (so_list_ptr == NULL) | |
395 | { | |
396 | /* We are setting up for a new scan through the loaded images. */ | |
397 | if ((so_list_next = so_list_head) == NULL) | |
398 | { | |
399 | /* Find the first link map list member. */ | |
400 | lm = first_link_map_member (); | |
401 | } | |
402 | } | |
403 | else | |
404 | { | |
405 | /* We have been called before, and are in the process of walking | |
406 | the shared library list. Advance to the next shared object. */ | |
407 | lm = next_link_map_member (so_list_ptr); | |
408 | so_list_next = so_list_ptr -> next; | |
409 | } | |
410 | if ((so_list_next == NULL) && (lm != NULL)) | |
411 | { | |
412 | /* Get next link map structure from inferior image and build a local | |
413 | abbreviated load_map structure */ | |
414 | new = (struct so_list *) xmalloc (sizeof (struct so_list)); | |
415 | memset ((char *) new, 0, sizeof (struct so_list)); | |
416 | new -> lmaddr = lm; | |
417 | /* Add the new node as the next node in the list, or as the root | |
418 | node if this is the first one. */ | |
419 | if (so_list_ptr != NULL) | |
420 | { | |
421 | so_list_ptr -> next = new; | |
422 | } | |
423 | else | |
424 | { | |
425 | so_list_head = new; | |
426 | } | |
427 | so_list_next = new; | |
428 | xfer_link_map_member (new, lm); | |
429 | } | |
430 | return (so_list_next); | |
431 | } | |
432 | ||
433 | /* A small stub to get us past the arg-passing pinhole of catch_errors. */ | |
434 | ||
435 | static int | |
436 | symbol_add_stub (arg) | |
437 | char *arg; | |
438 | { | |
439 | register struct so_list *so = (struct so_list *) arg; /* catch_errs bogon */ | |
440 | ||
441 | so -> objfile = symbol_file_add (so -> so_name, so -> from_tty, | |
442 | so -> textsection -> addr, | |
443 | 0, 0, 0); | |
444 | return (1); | |
445 | } | |
446 | ||
447 | /* | |
448 | ||
449 | GLOBAL FUNCTION | |
450 | ||
451 | solib_add -- add a shared library file to the symtab and section list | |
452 | ||
453 | SYNOPSIS | |
454 | ||
455 | void solib_add (char *arg_string, int from_tty, | |
456 | struct target_ops *target) | |
457 | ||
458 | DESCRIPTION | |
459 | ||
460 | */ | |
461 | ||
462 | void | |
463 | solib_add (arg_string, from_tty, target) | |
464 | char *arg_string; | |
465 | int from_tty; | |
466 | struct target_ops *target; | |
467 | { | |
468 | register struct so_list *so = NULL; /* link map state variable */ | |
469 | ||
470 | /* Last shared library that we read. */ | |
471 | struct so_list *so_last = NULL; | |
472 | ||
473 | char *re_err; | |
474 | int count; | |
475 | int old; | |
476 | ||
477 | if ((re_err = re_comp (arg_string ? arg_string : ".")) != NULL) | |
478 | { | |
479 | error ("Invalid regexp: %s", re_err); | |
480 | } | |
481 | ||
482 | ||
483 | /* Add the shared library sections to the section table of the | |
46d185d3 | 484 | specified target, if any. */ |
cef4c2e7 PS |
485 | if (target) |
486 | { | |
487 | /* Count how many new section_table entries there are. */ | |
488 | so = NULL; | |
489 | count = 0; | |
490 | while ((so = find_solib (so)) != NULL) | |
491 | { | |
492 | if (so -> so_name[0]) | |
493 | { | |
494 | count += so -> sections_end - so -> sections; | |
495 | } | |
496 | } | |
497 | ||
498 | if (count) | |
499 | { | |
500 | /* Reallocate the target's section table including the new size. */ | |
501 | if (target -> to_sections) | |
502 | { | |
503 | old = target -> to_sections_end - target -> to_sections; | |
504 | target -> to_sections = (struct section_table *) | |
505 | xrealloc ((char *)target -> to_sections, | |
506 | (sizeof (struct section_table)) * (count + old)); | |
507 | } | |
508 | else | |
509 | { | |
510 | old = 0; | |
511 | target -> to_sections = (struct section_table *) | |
512 | xmalloc ((sizeof (struct section_table)) * count); | |
513 | } | |
514 | target -> to_sections_end = target -> to_sections + (count + old); | |
515 | ||
516 | /* Add these section table entries to the target's table. */ | |
517 | while ((so = find_solib (so)) != NULL) | |
518 | { | |
519 | if (so -> so_name[0]) | |
520 | { | |
521 | count = so -> sections_end - so -> sections; | |
522 | memcpy ((char *) (target -> to_sections + old), | |
523 | so -> sections, | |
524 | (sizeof (struct section_table)) * count); | |
525 | old += count; | |
526 | } | |
527 | } | |
528 | } | |
529 | } | |
530 | ||
531 | /* Now add the symbol files. */ | |
532 | so = NULL; | |
533 | while ((so = find_solib (so)) != NULL) | |
534 | { | |
535 | if (so -> so_name[0] && re_exec (so -> so_name)) | |
536 | { | |
537 | so -> from_tty = from_tty; | |
538 | if (so -> symbols_loaded) | |
539 | { | |
540 | if (from_tty) | |
541 | { | |
199b2450 | 542 | printf_unfiltered ("Symbols already loaded for %s\n", so -> so_name); |
cef4c2e7 PS |
543 | } |
544 | } | |
545 | else if (catch_errors | |
546 | (symbol_add_stub, (char *) so, | |
547 | "Error while reading shared library symbols:\n", | |
548 | RETURN_MASK_ALL)) | |
549 | { | |
550 | so_last = so; | |
551 | so -> symbols_loaded = 1; | |
552 | } | |
553 | } | |
554 | } | |
46d185d3 PS |
555 | |
556 | /* Getting new symbols may change our opinion about what is | |
557 | frameless. */ | |
54d478cd | 558 | if (so_last) |
46d185d3 | 559 | reinit_frame_cache (); |
cef4c2e7 PS |
560 | } |
561 | ||
562 | /* | |
563 | ||
564 | LOCAL FUNCTION | |
565 | ||
566 | info_sharedlibrary_command -- code for "info sharedlibrary" | |
567 | ||
568 | SYNOPSIS | |
569 | ||
570 | static void info_sharedlibrary_command () | |
571 | ||
572 | DESCRIPTION | |
573 | ||
574 | Walk through the shared library list and print information | |
575 | about each attached library. | |
576 | */ | |
577 | ||
578 | static void | |
579 | info_sharedlibrary_command (ignore, from_tty) | |
580 | char *ignore; | |
581 | int from_tty; | |
582 | { | |
583 | register struct so_list *so = NULL; /* link map state variable */ | |
584 | int header_done = 0; | |
585 | ||
586 | if (exec_bfd == NULL) | |
587 | { | |
199b2450 | 588 | printf_unfiltered ("No exec file.\n"); |
cef4c2e7 PS |
589 | return; |
590 | } | |
591 | while ((so = find_solib (so)) != NULL) | |
592 | { | |
593 | if (so -> so_name[0]) | |
594 | { | |
595 | unsigned long txt_start = 0; | |
596 | unsigned long txt_end = 0; | |
597 | ||
598 | if (!header_done) | |
599 | { | |
199b2450 | 600 | printf_unfiltered("%-20s%-20s%-12s%s\n", "From", "To", "Syms Read", |
cef4c2e7 PS |
601 | "Shared Object Library"); |
602 | header_done++; | |
603 | } | |
604 | if (so -> textsection) | |
605 | { | |
606 | txt_start = (unsigned long) so -> textsection -> addr; | |
607 | txt_end = (unsigned long) so -> textsection -> endaddr; | |
608 | } | |
199b2450 TL |
609 | printf_unfiltered ("%-20s", local_hex_string_custom (txt_start, "08l")); |
610 | printf_unfiltered ("%-20s", local_hex_string_custom (txt_end, "08l")); | |
611 | printf_unfiltered ("%-12s", so -> symbols_loaded ? "Yes" : "No"); | |
612 | printf_unfiltered ("%s\n", so -> so_name); | |
cef4c2e7 PS |
613 | } |
614 | } | |
615 | if (so_list_head == NULL) | |
616 | { | |
199b2450 | 617 | printf_unfiltered ("No shared libraries loaded at this time.\n"); |
cef4c2e7 PS |
618 | } |
619 | } | |
620 | ||
621 | /* | |
622 | ||
623 | GLOBAL FUNCTION | |
624 | ||
625 | solib_address -- check to see if an address is in a shared lib | |
626 | ||
627 | SYNOPSIS | |
628 | ||
629 | int solib_address (CORE_ADDR address) | |
630 | ||
631 | DESCRIPTION | |
632 | ||
633 | Provides a hook for other gdb routines to discover whether or | |
634 | not a particular address is within the mapped address space of | |
635 | a shared library. Any address between the base mapping address | |
636 | and the first address beyond the end of the last mapping, is | |
637 | considered to be within the shared library address space, for | |
638 | our purposes. | |
639 | ||
640 | For example, this routine is called at one point to disable | |
641 | breakpoints which are in shared libraries that are not currently | |
642 | mapped in. | |
643 | */ | |
644 | ||
645 | int | |
646 | solib_address (address) | |
647 | CORE_ADDR address; | |
648 | { | |
649 | register struct so_list *so = 0; /* link map state variable */ | |
650 | ||
651 | while ((so = find_solib (so)) != NULL) | |
652 | { | |
653 | if (so -> so_name[0] && so -> textsection) | |
654 | { | |
655 | if ((address >= (CORE_ADDR) so -> textsection -> addr) && | |
656 | (address < (CORE_ADDR) so -> textsection -> endaddr)) | |
657 | { | |
658 | return (1); | |
659 | } | |
660 | } | |
661 | } | |
662 | return (0); | |
663 | } | |
664 | ||
665 | /* Called by free_all_symtabs */ | |
666 | ||
667 | void | |
668 | clear_solib() | |
669 | { | |
670 | struct so_list *next; | |
671 | char *bfd_filename; | |
672 | ||
673 | while (so_list_head) | |
674 | { | |
675 | if (so_list_head -> sections) | |
676 | { | |
677 | free ((PTR)so_list_head -> sections); | |
678 | } | |
a71c0593 | 679 | if (so_list_head -> abfd) |
cef4c2e7 | 680 | { |
a71c0593 FF |
681 | bfd_filename = bfd_get_filename (so_list_head -> abfd); |
682 | bfd_close (so_list_head -> abfd); | |
cef4c2e7 PS |
683 | } |
684 | else | |
685 | /* This happens for the executable on SVR4. */ | |
686 | bfd_filename = NULL; | |
687 | ||
688 | next = so_list_head -> next; | |
689 | if (bfd_filename) | |
690 | free ((PTR)bfd_filename); | |
691 | free ((PTR)so_list_head); | |
692 | so_list_head = next; | |
693 | } | |
694 | } | |
695 | ||
696 | /* | |
697 | ||
698 | GLOBAL FUNCTION | |
699 | ||
700 | solib_create_inferior_hook -- shared library startup support | |
701 | ||
702 | SYNOPSIS | |
703 | ||
704 | void solib_create_inferior_hook() | |
705 | ||
706 | DESCRIPTION | |
707 | ||
708 | When gdb starts up the inferior, it nurses it along (through the | |
709 | shell) until it is ready to execute it's first instruction. At this | |
710 | point, this function gets called via expansion of the macro | |
711 | SOLIB_CREATE_INFERIOR_HOOK. | |
712 | For a statically bound executable, this first instruction is the | |
713 | one at "_start", or a similar text label. No further processing is | |
714 | needed in that case. | |
715 | For a dynamically bound executable, this first instruction is somewhere | |
716 | in the rld, and the actual user executable is not yet mapped in. | |
717 | We continue the inferior again, rld then maps in the actual user | |
718 | executable and any needed shared libraries and then sends | |
719 | itself a SIGTRAP. | |
720 | At that point we discover the names of all shared libraries and | |
721 | read their symbols in. | |
722 | ||
723 | FIXME | |
724 | ||
725 | This code does not properly handle hitting breakpoints which the | |
726 | user might have set in the rld itself. Proper handling would have | |
727 | to check if the SIGTRAP happened due to a kill call. | |
728 | ||
729 | Also, what if child has exit()ed? Must exit loop somehow. | |
730 | */ | |
731 | ||
732 | void | |
733 | solib_create_inferior_hook() | |
734 | { | |
735 | ||
736 | /* Nothing to do for statically bound executables. */ | |
737 | ||
cef0333e PS |
738 | if (symfile_objfile == NULL |
739 | || symfile_objfile->obfd == NULL | |
740 | || ((bfd_get_file_flags (symfile_objfile->obfd) & DYNAMIC) == 0)) | |
cef4c2e7 PS |
741 | return; |
742 | ||
743 | /* Now run the target. It will eventually get a SIGTRAP, at | |
744 | which point all of the libraries will have been mapped in and we | |
745 | can go groveling around in the rld structures to find | |
746 | out what we need to know about them. */ | |
747 | ||
748 | clear_proceed_status (); | |
749 | stop_soon_quietly = 1; | |
67ac9759 | 750 | stop_signal = TARGET_SIGNAL_0; |
cef4c2e7 PS |
751 | do |
752 | { | |
de43d7d0 | 753 | target_resume (-1, 0, stop_signal); |
cef4c2e7 PS |
754 | wait_for_inferior (); |
755 | } | |
67ac9759 | 756 | while (stop_signal != TARGET_SIGNAL_TRAP); |
cef4c2e7 | 757 | |
46d185d3 | 758 | /* solib_add will call reinit_frame_cache. |
49d607d2 PS |
759 | But we are stopped in the runtime loader and we do not have symbols |
760 | for the runtime loader. So heuristic_proc_start will be called | |
761 | and will put out an annoying warning. | |
cef0333e PS |
762 | Delaying the resetting of stop_soon_quietly until after symbol loading |
763 | suppresses the warning. */ | |
cef4c2e7 | 764 | solib_add ((char *) 0, 0, (struct target_ops *) 0); |
49d607d2 | 765 | stop_soon_quietly = 0; |
cef4c2e7 PS |
766 | } |
767 | ||
768 | ||
769 | /* | |
770 | ||
771 | LOCAL FUNCTION | |
772 | ||
773 | sharedlibrary_command -- handle command to explicitly add library | |
774 | ||
775 | SYNOPSIS | |
776 | ||
777 | static void sharedlibrary_command (char *args, int from_tty) | |
778 | ||
779 | DESCRIPTION | |
780 | ||
781 | */ | |
782 | ||
783 | static void | |
784 | sharedlibrary_command (args, from_tty) | |
785 | char *args; | |
786 | int from_tty; | |
787 | { | |
788 | dont_repeat (); | |
789 | solib_add (args, from_tty, (struct target_ops *) 0); | |
790 | } | |
791 | ||
792 | void | |
793 | _initialize_solib() | |
794 | { | |
795 | ||
796 | add_com ("sharedlibrary", class_files, sharedlibrary_command, | |
797 | "Load shared object library symbols for files matching REGEXP."); | |
798 | add_info ("sharedlibrary", info_sharedlibrary_command, | |
799 | "Status of loaded shared object libraries."); | |
800 | } |