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c906108c SS |
1 | /* Handle OSF/1 shared libraries for GDB, the GNU Debugger. |
2 | Copyright 1993, 94, 95, 96, 98, 1999 Free Software Foundation, Inc. | |
c906108c | 3 | |
c5aa993b | 4 | This file is part of GDB. |
c906108c | 5 | |
c5aa993b JM |
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. | |
c906108c | 10 | |
c5aa993b JM |
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., 59 Temple Place - Suite 330, | |
19 | Boston, MA 02111-1307, USA. */ | |
c906108c SS |
20 | |
21 | /* FIXME: Most of this code could be merged with solib.c by using | |
22 | next_link_map_member and xfer_link_map_member in solib.c. */ | |
23 | ||
24 | #include "defs.h" | |
25 | ||
26 | #include <sys/types.h> | |
27 | #include <signal.h> | |
28 | #include "gdb_string.h" | |
29 | #include <fcntl.h> | |
30 | ||
31 | #include "symtab.h" | |
32 | #include "bfd.h" | |
33 | #include "symfile.h" | |
34 | #include "objfiles.h" | |
35 | #include "gdbcore.h" | |
36 | #include "command.h" | |
37 | #include "target.h" | |
38 | #include "frame.h" | |
88987551 | 39 | #include "gdb_regex.h" |
c906108c SS |
40 | #include "inferior.h" |
41 | #include "language.h" | |
42 | #include "gdbcmd.h" | |
43 | ||
c5aa993b | 44 | #define MAX_PATH_SIZE 1024 /* FIXME: Should be dynamic */ |
c906108c SS |
45 | |
46 | /* When handling shared libraries, GDB has to find out the pathnames | |
47 | of all shared libraries that are currently loaded (to read in their | |
48 | symbols) and where the shared libraries are loaded in memory | |
49 | (to relocate them properly from their prelinked addresses to the | |
50 | current load address). | |
51 | ||
52 | Under OSF/1 there are two possibilities to get at this information: | |
53 | 1) Peek around in the runtime loader structures. | |
c5aa993b JM |
54 | These are not documented, and they are not defined in the system |
55 | header files. The definitions below were obtained by experimentation, | |
56 | but they seem stable enough. | |
c906108c | 57 | 2) Use the undocumented libxproc.a library, which contains the |
c5aa993b JM |
58 | equivalent ldr_* routines. |
59 | This approach is somewhat cleaner, but it requires that the GDB | |
60 | executable is dynamically linked. In addition it requires a | |
61 | NAT_CLIBS= -lxproc -Wl,-expect_unresolved,ldr_process_context | |
62 | linker specification for GDB and all applications that are using | |
63 | libgdb. | |
c906108c SS |
64 | We will use the peeking approach until it becomes unwieldy. */ |
65 | ||
66 | #ifndef USE_LDR_ROUTINES | |
67 | ||
68 | /* Definition of runtime loader structures, found by experimentation. */ | |
69 | #define RLD_CONTEXT_ADDRESS 0x3ffc0000000 | |
70 | ||
71 | typedef struct | |
c5aa993b JM |
72 | { |
73 | CORE_ADDR next; | |
74 | CORE_ADDR previous; | |
75 | CORE_ADDR unknown1; | |
76 | char *module_name; | |
77 | CORE_ADDR modinfo_addr; | |
78 | long module_id; | |
79 | CORE_ADDR unknown2; | |
80 | CORE_ADDR unknown3; | |
81 | long region_count; | |
82 | CORE_ADDR regioninfo_addr; | |
83 | } | |
84 | ldr_module_info_t; | |
c906108c SS |
85 | |
86 | typedef struct | |
c5aa993b JM |
87 | { |
88 | long unknown1; | |
89 | CORE_ADDR regionname_addr; | |
90 | long protection; | |
91 | CORE_ADDR vaddr; | |
92 | CORE_ADDR mapaddr; | |
93 | long size; | |
94 | long unknown2[5]; | |
95 | } | |
96 | ldr_region_info_t; | |
c906108c SS |
97 | |
98 | typedef struct | |
c5aa993b JM |
99 | { |
100 | CORE_ADDR unknown1; | |
101 | CORE_ADDR unknown2; | |
102 | CORE_ADDR head; | |
103 | CORE_ADDR tail; | |
104 | } | |
105 | ldr_context_t; | |
c906108c SS |
106 | |
107 | static ldr_context_t ldr_context; | |
108 | ||
109 | #else | |
110 | ||
111 | #include <loader.h> | |
112 | static ldr_process_t fake_ldr_process; | |
113 | ||
114 | /* Called by ldr_* routines to read memory from the current target. */ | |
115 | ||
a14ed312 | 116 | static int ldr_read_memory (CORE_ADDR, char *, int, int); |
c906108c SS |
117 | |
118 | static int | |
fba45db2 | 119 | ldr_read_memory (CORE_ADDR memaddr, char *myaddr, int len, int readstring) |
c906108c SS |
120 | { |
121 | int result; | |
122 | char *buffer; | |
123 | ||
124 | if (readstring) | |
125 | { | |
126 | target_read_string (memaddr, &buffer, len, &result); | |
127 | if (result == 0) | |
c5aa993b | 128 | strcpy (myaddr, buffer); |
b8c9b27d | 129 | xfree (buffer); |
c906108c SS |
130 | } |
131 | else | |
132 | result = target_read_memory (memaddr, myaddr, len); | |
133 | ||
134 | if (result != 0) | |
135 | result = -result; | |
136 | return result; | |
137 | } | |
138 | ||
139 | #endif | |
140 | ||
141 | /* Define our own link_map structure. | |
142 | This will help to share code with solib.c. */ | |
143 | ||
c5aa993b JM |
144 | struct link_map |
145 | { | |
146 | CORE_ADDR l_offset; /* prelink to load address offset */ | |
147 | char *l_name; /* full name of loaded object */ | |
c906108c SS |
148 | ldr_module_info_t module_info; /* corresponding module info */ |
149 | }; | |
150 | ||
151 | #define LM_OFFSET(so) ((so) -> lm.l_offset) | |
152 | #define LM_NAME(so) ((so) -> lm.l_name) | |
153 | ||
c5aa993b JM |
154 | struct so_list |
155 | { | |
156 | struct so_list *next; /* next structure in linked list */ | |
157 | struct link_map lm; /* copy of link map from inferior */ | |
158 | struct link_map *lmaddr; /* addr in inferior lm was read from */ | |
159 | CORE_ADDR lmend; /* upper addr bound of mapped object */ | |
160 | char so_name[MAX_PATH_SIZE]; /* shared object lib name (FIXME) */ | |
161 | char symbols_loaded; /* flag: symbols read in yet? */ | |
162 | char from_tty; /* flag: print msgs? */ | |
163 | struct objfile *objfile; /* objfile for loaded lib */ | |
164 | struct section_table *sections; | |
165 | struct section_table *sections_end; | |
166 | struct section_table *textsection; | |
167 | bfd *abfd; | |
168 | }; | |
c906108c SS |
169 | |
170 | static struct so_list *so_list_head; /* List of known shared objects */ | |
171 | ||
a14ed312 | 172 | extern int fdmatch (int, int); /* In libiberty */ |
c906108c SS |
173 | |
174 | /* Local function prototypes */ | |
175 | ||
a14ed312 | 176 | static void sharedlibrary_command (char *, int); |
c906108c | 177 | |
a14ed312 | 178 | static void info_sharedlibrary_command (char *, int); |
c906108c | 179 | |
a14ed312 | 180 | static int symbol_add_stub (char *); |
c906108c | 181 | |
a14ed312 | 182 | static struct so_list *find_solib (struct so_list *); |
c906108c | 183 | |
a14ed312 | 184 | static struct link_map *first_link_map_member (void); |
c906108c | 185 | |
a14ed312 | 186 | static struct link_map *next_link_map_member (struct so_list *); |
c906108c | 187 | |
a14ed312 | 188 | static void xfer_link_map_member (struct so_list *, struct link_map *); |
c906108c | 189 | |
a14ed312 | 190 | static int solib_map_sections (char *); |
c906108c SS |
191 | |
192 | /* | |
193 | ||
c5aa993b | 194 | LOCAL FUNCTION |
c906108c | 195 | |
c5aa993b | 196 | solib_map_sections -- open bfd and build sections for shared lib |
c906108c | 197 | |
c5aa993b | 198 | SYNOPSIS |
c906108c | 199 | |
c5aa993b | 200 | static int solib_map_sections (struct so_list *so) |
c906108c | 201 | |
c5aa993b | 202 | DESCRIPTION |
c906108c | 203 | |
c5aa993b JM |
204 | Given a pointer to one of the shared objects in our list |
205 | of mapped objects, use the recorded name to open a bfd | |
206 | descriptor for the object, build a section table, and then | |
207 | relocate all the section addresses by the base address at | |
208 | which the shared object was mapped. | |
c906108c | 209 | |
c5aa993b | 210 | FIXMES |
c906108c | 211 | |
c5aa993b JM |
212 | In most (all?) cases the shared object file name recorded in the |
213 | dynamic linkage tables will be a fully qualified pathname. For | |
214 | cases where it isn't, do we really mimic the systems search | |
215 | mechanism correctly in the below code (particularly the tilde | |
216 | expansion stuff?). | |
c906108c SS |
217 | */ |
218 | ||
219 | static int | |
fba45db2 | 220 | solib_map_sections (char *arg) |
c906108c SS |
221 | { |
222 | struct so_list *so = (struct so_list *) arg; /* catch_errors bogon */ | |
223 | char *filename; | |
224 | char *scratch_pathname; | |
225 | int scratch_chan; | |
226 | struct section_table *p; | |
227 | struct cleanup *old_chain; | |
228 | bfd *abfd; | |
c5aa993b JM |
229 | |
230 | filename = tilde_expand (so->so_name); | |
b8c9b27d | 231 | old_chain = make_cleanup (xfree, filename); |
c5aa993b | 232 | |
c906108c SS |
233 | scratch_chan = openp (getenv ("PATH"), 1, filename, O_RDONLY, 0, |
234 | &scratch_pathname); | |
235 | if (scratch_chan < 0) | |
236 | { | |
237 | scratch_chan = openp (getenv ("LD_LIBRARY_PATH"), 1, filename, | |
238 | O_RDONLY, 0, &scratch_pathname); | |
239 | } | |
240 | if (scratch_chan < 0) | |
241 | { | |
242 | perror_with_name (filename); | |
243 | } | |
244 | /* Leave scratch_pathname allocated. bfd->name will point to it. */ | |
245 | ||
246 | abfd = bfd_fdopenr (scratch_pathname, gnutarget, scratch_chan); | |
247 | if (!abfd) | |
248 | { | |
249 | close (scratch_chan); | |
250 | error ("Could not open `%s' as an executable file: %s", | |
251 | scratch_pathname, bfd_errmsg (bfd_get_error ())); | |
252 | } | |
253 | /* Leave bfd open, core_xfer_memory and "info files" need it. */ | |
c5aa993b JM |
254 | so->abfd = abfd; |
255 | abfd->cacheable = true; | |
c906108c SS |
256 | |
257 | if (!bfd_check_format (abfd, bfd_object)) | |
258 | { | |
259 | error ("\"%s\": not in executable format: %s.", | |
260 | scratch_pathname, bfd_errmsg (bfd_get_error ())); | |
261 | } | |
c5aa993b | 262 | if (build_section_table (abfd, &so->sections, &so->sections_end)) |
c906108c | 263 | { |
c5aa993b | 264 | error ("Can't find the file sections in `%s': %s", |
c906108c SS |
265 | bfd_get_filename (exec_bfd), bfd_errmsg (bfd_get_error ())); |
266 | } | |
267 | ||
c5aa993b | 268 | for (p = so->sections; p < so->sections_end; p++) |
c906108c SS |
269 | { |
270 | /* Relocate the section binding addresses as recorded in the shared | |
c5aa993b JM |
271 | object's file by the offset to get the address to which the |
272 | object was actually mapped. */ | |
273 | p->addr += LM_OFFSET (so); | |
274 | p->endaddr += LM_OFFSET (so); | |
275 | so->lmend = (CORE_ADDR) max (p->endaddr, so->lmend); | |
276 | if (STREQ (p->the_bfd_section->name, ".text")) | |
c906108c | 277 | { |
c5aa993b | 278 | so->textsection = p; |
c906108c SS |
279 | } |
280 | } | |
281 | ||
282 | /* Free the file names, close the file now. */ | |
283 | do_cleanups (old_chain); | |
284 | ||
285 | return (1); | |
286 | } | |
287 | ||
288 | /* | |
289 | ||
c5aa993b | 290 | LOCAL FUNCTION |
c906108c | 291 | |
c5aa993b | 292 | first_link_map_member -- locate first member in dynamic linker's map |
c906108c | 293 | |
c5aa993b | 294 | SYNOPSIS |
c906108c | 295 | |
c5aa993b | 296 | static struct link_map *first_link_map_member (void) |
c906108c | 297 | |
c5aa993b | 298 | DESCRIPTION |
c906108c | 299 | |
c5aa993b JM |
300 | Read in a copy of the first member in the inferior's dynamic |
301 | link map from the inferior's dynamic linker structures, and return | |
302 | a pointer to the copy in our address space. | |
303 | */ | |
c906108c SS |
304 | |
305 | static struct link_map * | |
fba45db2 | 306 | first_link_map_member (void) |
c906108c SS |
307 | { |
308 | struct link_map *lm = NULL; | |
309 | static struct link_map first_lm; | |
310 | ||
311 | #ifdef USE_LDR_ROUTINES | |
312 | ldr_module_t mod_id = LDR_NULL_MODULE; | |
313 | size_t retsize; | |
314 | ||
315 | fake_ldr_process = ldr_core_process (); | |
316 | ldr_set_core_reader (ldr_read_memory); | |
317 | ldr_xdetach (fake_ldr_process); | |
318 | if (ldr_xattach (fake_ldr_process) != 0 | |
c5aa993b | 319 | || ldr_next_module (fake_ldr_process, &mod_id) != 0 |
c906108c | 320 | || mod_id == LDR_NULL_MODULE |
c5aa993b JM |
321 | || ldr_inq_module (fake_ldr_process, mod_id, |
322 | &first_lm.module_info, sizeof (ldr_module_info_t), | |
323 | &retsize) != 0) | |
c906108c SS |
324 | return lm; |
325 | #else | |
326 | CORE_ADDR ldr_context_addr; | |
327 | ||
328 | if (target_read_memory ((CORE_ADDR) RLD_CONTEXT_ADDRESS, | |
329 | (char *) &ldr_context_addr, | |
330 | sizeof (CORE_ADDR)) != 0 | |
331 | || target_read_memory (ldr_context_addr, | |
332 | (char *) &ldr_context, | |
333 | sizeof (ldr_context_t)) != 0 | |
334 | || target_read_memory ((CORE_ADDR) ldr_context.head, | |
335 | (char *) &first_lm.module_info, | |
336 | sizeof (ldr_module_info_t)) != 0) | |
337 | return lm; | |
338 | #endif | |
339 | ||
340 | lm = &first_lm; | |
341 | ||
342 | /* The first entry is for the main program and should be skipped. */ | |
343 | lm->l_name = NULL; | |
344 | ||
345 | return lm; | |
346 | } | |
347 | ||
348 | static struct link_map * | |
fba45db2 | 349 | next_link_map_member (struct so_list *so_list_ptr) |
c906108c SS |
350 | { |
351 | struct link_map *lm = NULL; | |
352 | static struct link_map next_lm; | |
353 | #ifdef USE_LDR_ROUTINES | |
354 | ldr_module_t mod_id = so_list_ptr->lm.module_info.lmi_modid; | |
355 | size_t retsize; | |
356 | ||
c5aa993b | 357 | if (ldr_next_module (fake_ldr_process, &mod_id) != 0 |
c906108c | 358 | || mod_id == LDR_NULL_MODULE |
c5aa993b JM |
359 | || ldr_inq_module (fake_ldr_process, mod_id, |
360 | &next_lm.module_info, sizeof (ldr_module_info_t), | |
361 | &retsize) != 0) | |
c906108c SS |
362 | return lm; |
363 | ||
364 | lm = &next_lm; | |
365 | lm->l_name = lm->module_info.lmi_name; | |
366 | #else | |
367 | CORE_ADDR ldr_context_addr; | |
368 | ||
369 | /* Reread context in case ldr_context.tail was updated. */ | |
370 | ||
371 | if (target_read_memory ((CORE_ADDR) RLD_CONTEXT_ADDRESS, | |
372 | (char *) &ldr_context_addr, | |
373 | sizeof (CORE_ADDR)) != 0 | |
374 | || target_read_memory (ldr_context_addr, | |
375 | (char *) &ldr_context, | |
376 | sizeof (ldr_context_t)) != 0 | |
377 | || so_list_ptr->lm.module_info.modinfo_addr == ldr_context.tail | |
378 | || target_read_memory (so_list_ptr->lm.module_info.next, | |
379 | (char *) &next_lm.module_info, | |
380 | sizeof (ldr_module_info_t)) != 0) | |
381 | return lm; | |
382 | ||
383 | lm = &next_lm; | |
384 | lm->l_name = lm->module_info.module_name; | |
385 | #endif | |
386 | return lm; | |
387 | } | |
388 | ||
389 | static void | |
fba45db2 | 390 | xfer_link_map_member (struct so_list *so_list_ptr, struct link_map *lm) |
c906108c SS |
391 | { |
392 | int i; | |
393 | so_list_ptr->lm = *lm; | |
394 | ||
395 | /* OSF/1 shared libraries are pre-linked to particular addresses, | |
396 | but the runtime loader may have to relocate them if the | |
397 | address ranges of the libraries used by the target executable clash, | |
398 | or if the target executable is linked with the -taso option. | |
399 | The offset is the difference between the address where the shared | |
400 | library is mapped and the pre-linked address of the shared library. | |
401 | ||
402 | FIXME: GDB is currently unable to relocate the shared library | |
403 | sections by different offsets. If sections are relocated by | |
404 | different offsets, put out a warning and use the offset of the | |
405 | first section for all remaining sections. */ | |
406 | LM_OFFSET (so_list_ptr) = 0; | |
407 | ||
408 | /* There is one entry that has no name (for the inferior executable) | |
409 | since it is not a shared object. */ | |
410 | if (LM_NAME (so_list_ptr) != 0) | |
411 | { | |
412 | ||
413 | #ifdef USE_LDR_ROUTINES | |
414 | int len = strlen (LM_NAME (so_list_ptr) + 1); | |
415 | ||
416 | if (len > MAX_PATH_SIZE) | |
417 | len = MAX_PATH_SIZE; | |
418 | strncpy (so_list_ptr->so_name, LM_NAME (so_list_ptr), MAX_PATH_SIZE); | |
419 | so_list_ptr->so_name[MAX_PATH_SIZE - 1] = '\0'; | |
420 | ||
421 | for (i = 0; i < lm->module_info.lmi_nregion; i++) | |
422 | { | |
423 | ldr_region_info_t region_info; | |
424 | size_t retsize; | |
425 | CORE_ADDR region_offset; | |
426 | ||
427 | if (ldr_inq_region (fake_ldr_process, lm->module_info.lmi_modid, | |
428 | i, ®ion_info, sizeof (region_info), | |
429 | &retsize) != 0) | |
430 | break; | |
431 | region_offset = (CORE_ADDR) region_info.lri_mapaddr | |
c5aa993b | 432 | - (CORE_ADDR) region_info.lri_vaddr; |
c906108c SS |
433 | if (i == 0) |
434 | LM_OFFSET (so_list_ptr) = region_offset; | |
435 | else if (LM_OFFSET (so_list_ptr) != region_offset) | |
436 | warning ("cannot handle shared library relocation for %s (%s)", | |
437 | so_list_ptr->so_name, region_info.lri_name); | |
438 | } | |
439 | #else | |
440 | int errcode; | |
441 | char *buffer; | |
442 | target_read_string ((CORE_ADDR) LM_NAME (so_list_ptr), &buffer, | |
443 | MAX_PATH_SIZE - 1, &errcode); | |
444 | if (errcode != 0) | |
445 | error ("xfer_link_map_member: Can't read pathname for load map: %s\n", | |
446 | safe_strerror (errcode)); | |
447 | strncpy (so_list_ptr->so_name, buffer, MAX_PATH_SIZE - 1); | |
b8c9b27d | 448 | xfree (buffer); |
c906108c SS |
449 | so_list_ptr->so_name[MAX_PATH_SIZE - 1] = '\0'; |
450 | ||
451 | for (i = 0; i < lm->module_info.region_count; i++) | |
452 | { | |
453 | ldr_region_info_t region_info; | |
454 | CORE_ADDR region_offset; | |
455 | ||
456 | if (target_read_memory (lm->module_info.regioninfo_addr | |
c5aa993b | 457 | + i * sizeof (region_info), |
c906108c SS |
458 | (char *) ®ion_info, |
459 | sizeof (region_info)) != 0) | |
460 | break; | |
461 | region_offset = region_info.mapaddr - region_info.vaddr; | |
462 | if (i == 0) | |
463 | LM_OFFSET (so_list_ptr) = region_offset; | |
464 | else if (LM_OFFSET (so_list_ptr) != region_offset) | |
465 | { | |
466 | char *region_name; | |
467 | target_read_string (region_info.regionname_addr, &buffer, | |
468 | MAX_PATH_SIZE - 1, &errcode); | |
469 | if (errcode == 0) | |
470 | region_name = buffer; | |
471 | else | |
472 | region_name = "??"; | |
473 | warning ("cannot handle shared library relocation for %s (%s)", | |
c5aa993b | 474 | so_list_ptr->so_name, region_name); |
b8c9b27d | 475 | xfree (buffer); |
c906108c SS |
476 | } |
477 | } | |
478 | #endif | |
479 | ||
480 | catch_errors (solib_map_sections, (char *) so_list_ptr, | |
481 | "Error while mapping shared library sections:\n", | |
482 | RETURN_MASK_ALL); | |
483 | } | |
484 | } | |
485 | ||
486 | /* | |
487 | ||
c5aa993b | 488 | LOCAL FUNCTION |
c906108c | 489 | |
c5aa993b | 490 | find_solib -- step through list of shared objects |
c906108c | 491 | |
c5aa993b | 492 | SYNOPSIS |
c906108c | 493 | |
c5aa993b | 494 | struct so_list *find_solib (struct so_list *so_list_ptr) |
c906108c | 495 | |
c5aa993b | 496 | DESCRIPTION |
c906108c | 497 | |
c5aa993b JM |
498 | This module contains the routine which finds the names of any |
499 | loaded "images" in the current process. The argument in must be | |
500 | NULL on the first call, and then the returned value must be passed | |
501 | in on subsequent calls. This provides the capability to "step" down | |
502 | the list of loaded objects. On the last object, a NULL value is | |
503 | returned. | |
c906108c | 504 | |
c5aa993b JM |
505 | The arg and return value are "struct link_map" pointers, as defined |
506 | in <link.h>. | |
c906108c SS |
507 | */ |
508 | ||
509 | static struct so_list * | |
fa6b9313 | 510 | find_solib (struct so_list *so_list_ptr) |
c906108c SS |
511 | { |
512 | struct so_list *so_list_next = NULL; | |
513 | struct link_map *lm = NULL; | |
514 | struct so_list *new; | |
c5aa993b | 515 | |
c906108c SS |
516 | if (so_list_ptr == NULL) |
517 | { | |
518 | /* We are setting up for a new scan through the loaded images. */ | |
519 | if ((so_list_next = so_list_head) == NULL) | |
520 | { | |
521 | /* Find the first link map list member. */ | |
522 | lm = first_link_map_member (); | |
523 | } | |
524 | } | |
525 | else | |
526 | { | |
527 | /* We have been called before, and are in the process of walking | |
c5aa993b | 528 | the shared library list. Advance to the next shared object. */ |
c906108c | 529 | lm = next_link_map_member (so_list_ptr); |
c5aa993b | 530 | so_list_next = so_list_ptr->next; |
c906108c SS |
531 | } |
532 | if ((so_list_next == NULL) && (lm != NULL)) | |
533 | { | |
534 | /* Get next link map structure from inferior image and build a local | |
c5aa993b | 535 | abbreviated load_map structure */ |
c906108c SS |
536 | new = (struct so_list *) xmalloc (sizeof (struct so_list)); |
537 | memset ((char *) new, 0, sizeof (struct so_list)); | |
c5aa993b | 538 | new->lmaddr = lm; |
c906108c | 539 | /* Add the new node as the next node in the list, or as the root |
c5aa993b | 540 | node if this is the first one. */ |
c906108c SS |
541 | if (so_list_ptr != NULL) |
542 | { | |
c5aa993b | 543 | so_list_ptr->next = new; |
c906108c SS |
544 | } |
545 | else | |
546 | { | |
547 | so_list_head = new; | |
c5aa993b | 548 | } |
c906108c SS |
549 | so_list_next = new; |
550 | xfer_link_map_member (new, lm); | |
551 | } | |
552 | return (so_list_next); | |
553 | } | |
554 | ||
555 | /* A small stub to get us past the arg-passing pinhole of catch_errors. */ | |
556 | ||
557 | static int | |
fba45db2 | 558 | symbol_add_stub (char *arg) |
c906108c | 559 | { |
c5aa993b | 560 | register struct so_list *so = (struct so_list *) arg; /* catch_errs bogon */ |
c906108c | 561 | CORE_ADDR text_addr = 0; |
2acceee2 | 562 | struct section_addr_info section_addrs; |
c906108c | 563 | |
2acceee2 | 564 | memset (§ion_addrs, 0, sizeof (section_addrs)); |
c5aa993b JM |
565 | if (so->textsection) |
566 | text_addr = so->textsection->addr; | |
567 | else if (so->abfd != NULL) | |
c906108c SS |
568 | { |
569 | asection *lowest_sect; | |
570 | ||
571 | /* If we didn't find a mapped non zero sized .text section, set up | |
c5aa993b | 572 | text_addr so that the relocation in symbol_file_add does no harm. */ |
c906108c | 573 | |
c5aa993b | 574 | lowest_sect = bfd_get_section_by_name (so->abfd, ".text"); |
c906108c | 575 | if (lowest_sect == NULL) |
c5aa993b | 576 | bfd_map_over_sections (so->abfd, find_lowest_section, |
96baa820 | 577 | (PTR) &lowest_sect); |
c906108c | 578 | if (lowest_sect) |
c5aa993b | 579 | text_addr = bfd_section_vma (so->abfd, lowest_sect) + LM_OFFSET (so); |
c906108c | 580 | } |
c5aa993b | 581 | |
a034fba4 EZ |
582 | section_addrs.other[0].addr = text_addr; |
583 | section_addrs.other[0].name = ".text"; | |
c5aa993b | 584 | so->objfile = symbol_file_add (so->so_name, so->from_tty, |
2df3850c | 585 | §ion_addrs, 0, OBJF_SHARED); |
c906108c SS |
586 | return (1); |
587 | } | |
588 | ||
589 | /* | |
590 | ||
c5aa993b | 591 | GLOBAL FUNCTION |
c906108c | 592 | |
c5aa993b | 593 | solib_add -- add a shared library file to the symtab and section list |
c906108c | 594 | |
c5aa993b | 595 | SYNOPSIS |
c906108c | 596 | |
c5aa993b JM |
597 | void solib_add (char *arg_string, int from_tty, |
598 | struct target_ops *target) | |
c906108c | 599 | |
c5aa993b | 600 | DESCRIPTION |
c906108c | 601 | |
c5aa993b | 602 | */ |
c906108c SS |
603 | |
604 | void | |
fba45db2 | 605 | solib_add (char *arg_string, int from_tty, struct target_ops *target) |
c5aa993b JM |
606 | { |
607 | register struct so_list *so = NULL; /* link map state variable */ | |
c906108c SS |
608 | |
609 | /* Last shared library that we read. */ | |
610 | struct so_list *so_last = NULL; | |
611 | ||
612 | char *re_err; | |
613 | int count; | |
614 | int old; | |
c5aa993b | 615 | |
c906108c SS |
616 | if ((re_err = re_comp (arg_string ? arg_string : ".")) != NULL) |
617 | { | |
618 | error ("Invalid regexp: %s", re_err); | |
619 | } | |
c5aa993b JM |
620 | |
621 | ||
c906108c SS |
622 | /* Add the shared library sections to the section table of the |
623 | specified target, if any. */ | |
624 | if (target) | |
625 | { | |
626 | /* Count how many new section_table entries there are. */ | |
627 | so = NULL; | |
628 | count = 0; | |
629 | while ((so = find_solib (so)) != NULL) | |
630 | { | |
c5aa993b | 631 | if (so->so_name[0]) |
c906108c | 632 | { |
c5aa993b | 633 | count += so->sections_end - so->sections; |
c906108c SS |
634 | } |
635 | } | |
c5aa993b | 636 | |
c906108c SS |
637 | if (count) |
638 | { | |
c906108c | 639 | /* Add these section table entries to the target's table. */ |
6426a772 JM |
640 | |
641 | old = target_resize_to_sections (target, count); | |
642 | ||
c906108c SS |
643 | while ((so = find_solib (so)) != NULL) |
644 | { | |
c5aa993b | 645 | if (so->so_name[0]) |
c906108c | 646 | { |
c5aa993b JM |
647 | count = so->sections_end - so->sections; |
648 | memcpy ((char *) (target->to_sections + old), | |
649 | so->sections, | |
c906108c SS |
650 | (sizeof (struct section_table)) * count); |
651 | old += count; | |
652 | } | |
653 | } | |
654 | } | |
655 | } | |
c5aa993b | 656 | |
c906108c SS |
657 | /* Now add the symbol files. */ |
658 | so = NULL; | |
659 | while ((so = find_solib (so)) != NULL) | |
660 | { | |
c5aa993b | 661 | if (so->so_name[0] && re_exec (so->so_name)) |
c906108c | 662 | { |
c5aa993b JM |
663 | so->from_tty = from_tty; |
664 | if (so->symbols_loaded) | |
c906108c SS |
665 | { |
666 | if (from_tty) | |
667 | { | |
c5aa993b | 668 | printf_unfiltered ("Symbols already loaded for %s\n", so->so_name); |
c906108c SS |
669 | } |
670 | } | |
671 | else if (catch_errors | |
672 | (symbol_add_stub, (char *) so, | |
673 | "Error while reading shared library symbols:\n", | |
674 | RETURN_MASK_ALL)) | |
675 | { | |
676 | so_last = so; | |
c5aa993b | 677 | so->symbols_loaded = 1; |
c906108c SS |
678 | } |
679 | } | |
680 | } | |
681 | ||
682 | /* Getting new symbols may change our opinion about what is | |
683 | frameless. */ | |
684 | if (so_last) | |
685 | reinit_frame_cache (); | |
686 | } | |
687 | ||
688 | /* | |
689 | ||
c5aa993b | 690 | LOCAL FUNCTION |
c906108c | 691 | |
c5aa993b | 692 | info_sharedlibrary_command -- code for "info sharedlibrary" |
c906108c | 693 | |
c5aa993b | 694 | SYNOPSIS |
c906108c | 695 | |
c5aa993b | 696 | static void info_sharedlibrary_command () |
c906108c | 697 | |
c5aa993b | 698 | DESCRIPTION |
c906108c | 699 | |
c5aa993b JM |
700 | Walk through the shared library list and print information |
701 | about each attached library. | |
702 | */ | |
c906108c SS |
703 | |
704 | static void | |
fba45db2 | 705 | info_sharedlibrary_command (char *ignore, int from_tty) |
c906108c | 706 | { |
c5aa993b | 707 | register struct so_list *so = NULL; /* link map state variable */ |
c906108c | 708 | int header_done = 0; |
c5aa993b | 709 | |
c906108c SS |
710 | if (exec_bfd == NULL) |
711 | { | |
4ce44c66 | 712 | printf_unfiltered ("No executable file.\n"); |
c906108c SS |
713 | return; |
714 | } | |
715 | while ((so = find_solib (so)) != NULL) | |
716 | { | |
c5aa993b | 717 | if (so->so_name[0]) |
c906108c SS |
718 | { |
719 | unsigned long txt_start = 0; | |
720 | unsigned long txt_end = 0; | |
721 | ||
722 | if (!header_done) | |
723 | { | |
c5aa993b JM |
724 | printf_unfiltered ("%-20s%-20s%-12s%s\n", "From", "To", "Syms Read", |
725 | "Shared Object Library"); | |
c906108c SS |
726 | header_done++; |
727 | } | |
c5aa993b | 728 | if (so->textsection) |
c906108c | 729 | { |
c5aa993b JM |
730 | txt_start = (unsigned long) so->textsection->addr; |
731 | txt_end = (unsigned long) so->textsection->endaddr; | |
c906108c SS |
732 | } |
733 | printf_unfiltered ("%-20s", local_hex_string_custom (txt_start, "08l")); | |
734 | printf_unfiltered ("%-20s", local_hex_string_custom (txt_end, "08l")); | |
c5aa993b JM |
735 | printf_unfiltered ("%-12s", so->symbols_loaded ? "Yes" : "No"); |
736 | printf_unfiltered ("%s\n", so->so_name); | |
c906108c SS |
737 | } |
738 | } | |
739 | if (so_list_head == NULL) | |
740 | { | |
c5aa993b | 741 | printf_unfiltered ("No shared libraries loaded at this time.\n"); |
c906108c SS |
742 | } |
743 | } | |
744 | ||
745 | /* | |
746 | ||
c5aa993b | 747 | GLOBAL FUNCTION |
c906108c | 748 | |
c5aa993b | 749 | solib_address -- check to see if an address is in a shared lib |
c906108c | 750 | |
c5aa993b | 751 | SYNOPSIS |
c906108c | 752 | |
c5aa993b | 753 | char *solib_address (CORE_ADDR address) |
c906108c | 754 | |
c5aa993b | 755 | DESCRIPTION |
c906108c | 756 | |
c5aa993b JM |
757 | Provides a hook for other gdb routines to discover whether or |
758 | not a particular address is within the mapped address space of | |
759 | a shared library. Any address between the base mapping address | |
760 | and the first address beyond the end of the last mapping, is | |
761 | considered to be within the shared library address space, for | |
762 | our purposes. | |
c906108c | 763 | |
c5aa993b JM |
764 | For example, this routine is called at one point to disable |
765 | breakpoints which are in shared libraries that are not currently | |
766 | mapped in. | |
c906108c SS |
767 | */ |
768 | ||
769 | char * | |
fba45db2 | 770 | solib_address (CORE_ADDR address) |
c906108c | 771 | { |
c5aa993b JM |
772 | register struct so_list *so = 0; /* link map state variable */ |
773 | ||
c906108c SS |
774 | while ((so = find_solib (so)) != NULL) |
775 | { | |
c5aa993b | 776 | if (so->so_name[0] && so->textsection) |
c906108c | 777 | { |
c5aa993b JM |
778 | if ((address >= (CORE_ADDR) so->textsection->addr) && |
779 | (address < (CORE_ADDR) so->textsection->endaddr)) | |
c906108c SS |
780 | return (so->so_name); |
781 | } | |
782 | } | |
783 | return (0); | |
784 | } | |
785 | ||
786 | /* Called by free_all_symtabs */ | |
787 | ||
c5aa993b | 788 | void |
fba45db2 | 789 | clear_solib (void) |
c906108c SS |
790 | { |
791 | struct so_list *next; | |
792 | char *bfd_filename; | |
c5aa993b | 793 | |
c906108c SS |
794 | disable_breakpoints_in_shlibs (1); |
795 | ||
796 | while (so_list_head) | |
797 | { | |
c5aa993b | 798 | if (so_list_head->sections) |
c906108c | 799 | { |
b8c9b27d | 800 | xfree (so_list_head->sections); |
c906108c | 801 | } |
c5aa993b | 802 | if (so_list_head->abfd) |
c906108c | 803 | { |
c5aa993b JM |
804 | bfd_filename = bfd_get_filename (so_list_head->abfd); |
805 | if (!bfd_close (so_list_head->abfd)) | |
c906108c SS |
806 | warning ("cannot close \"%s\": %s", |
807 | bfd_filename, bfd_errmsg (bfd_get_error ())); | |
808 | } | |
809 | else | |
810 | /* This happens for the executable on SVR4. */ | |
811 | bfd_filename = NULL; | |
812 | ||
c5aa993b | 813 | next = so_list_head->next; |
c906108c | 814 | if (bfd_filename) |
b8c9b27d KB |
815 | xfree (bfd_filename); |
816 | xfree (so_list_head); | |
c906108c SS |
817 | so_list_head = next; |
818 | } | |
819 | } | |
c5aa993b | 820 | |
c906108c | 821 | /* |
c5aa993b JM |
822 | |
823 | GLOBAL FUNCTION | |
824 | ||
825 | solib_create_inferior_hook -- shared library startup support | |
826 | ||
827 | SYNOPSIS | |
828 | ||
829 | void solib_create_inferior_hook() | |
830 | ||
831 | DESCRIPTION | |
832 | ||
833 | When gdb starts up the inferior, it nurses it along (through the | |
834 | shell) until it is ready to execute it's first instruction. At this | |
835 | point, this function gets called via expansion of the macro | |
836 | SOLIB_CREATE_INFERIOR_HOOK. | |
837 | For a statically bound executable, this first instruction is the | |
838 | one at "_start", or a similar text label. No further processing is | |
839 | needed in that case. | |
840 | For a dynamically bound executable, this first instruction is somewhere | |
841 | in the rld, and the actual user executable is not yet mapped in. | |
842 | We continue the inferior again, rld then maps in the actual user | |
843 | executable and any needed shared libraries and then sends | |
844 | itself a SIGTRAP. | |
845 | At that point we discover the names of all shared libraries and | |
846 | read their symbols in. | |
847 | ||
848 | FIXME | |
849 | ||
850 | This code does not properly handle hitting breakpoints which the | |
851 | user might have set in the rld itself. Proper handling would have | |
852 | to check if the SIGTRAP happened due to a kill call. | |
853 | ||
854 | Also, what if child has exit()ed? Must exit loop somehow. | |
855 | */ | |
c906108c SS |
856 | |
857 | void | |
fba45db2 | 858 | solib_create_inferior_hook (void) |
c906108c SS |
859 | { |
860 | ||
861 | /* Nothing to do for statically bound executables. */ | |
862 | ||
863 | if (symfile_objfile == NULL | |
864 | || symfile_objfile->obfd == NULL | |
865 | || ((bfd_get_file_flags (symfile_objfile->obfd) & DYNAMIC) == 0)) | |
866 | return; | |
867 | ||
868 | /* Now run the target. It will eventually get a SIGTRAP, at | |
869 | which point all of the libraries will have been mapped in and we | |
870 | can go groveling around in the rld structures to find | |
871 | out what we need to know about them. */ | |
c5aa993b | 872 | |
c906108c SS |
873 | clear_proceed_status (); |
874 | stop_soon_quietly = 1; | |
875 | stop_signal = TARGET_SIGNAL_0; | |
876 | do | |
877 | { | |
878 | target_resume (-1, 0, stop_signal); | |
879 | wait_for_inferior (); | |
880 | } | |
881 | while (stop_signal != TARGET_SIGNAL_TRAP); | |
882 | ||
883 | /* solib_add will call reinit_frame_cache. | |
c5aa993b JM |
884 | But we are stopped in the runtime loader and we do not have symbols |
885 | for the runtime loader. So heuristic_proc_start will be called | |
886 | and will put out an annoying warning. | |
887 | Delaying the resetting of stop_soon_quietly until after symbol loading | |
888 | suppresses the warning. */ | |
c906108c SS |
889 | if (auto_solib_add) |
890 | solib_add ((char *) 0, 0, (struct target_ops *) 0); | |
891 | stop_soon_quietly = 0; | |
892 | } | |
893 | ||
894 | ||
895 | /* | |
896 | ||
c5aa993b | 897 | LOCAL FUNCTION |
c906108c | 898 | |
c5aa993b | 899 | sharedlibrary_command -- handle command to explicitly add library |
c906108c | 900 | |
c5aa993b | 901 | SYNOPSIS |
c906108c | 902 | |
c5aa993b | 903 | static void sharedlibrary_command (char *args, int from_tty) |
c906108c | 904 | |
c5aa993b | 905 | DESCRIPTION |
c906108c | 906 | |
c5aa993b | 907 | */ |
c906108c SS |
908 | |
909 | static void | |
fba45db2 | 910 | sharedlibrary_command (char *args, int from_tty) |
c906108c SS |
911 | { |
912 | dont_repeat (); | |
913 | solib_add (args, from_tty, (struct target_ops *) 0); | |
914 | } | |
915 | ||
916 | void | |
fba45db2 | 917 | _initialize_solib (void) |
c906108c SS |
918 | { |
919 | add_com ("sharedlibrary", class_files, sharedlibrary_command, | |
920 | "Load shared object library symbols for files matching REGEXP."); | |
c5aa993b | 921 | add_info ("sharedlibrary", info_sharedlibrary_command, |
c906108c SS |
922 | "Status of loaded shared object libraries."); |
923 | ||
924 | add_show_from_set | |
925 | (add_set_cmd ("auto-solib-add", class_support, var_zinteger, | |
926 | (char *) &auto_solib_add, | |
927 | "Set autoloading of shared library symbols.\n\ | |
928 | If nonzero, symbols from all shared object libraries will be loaded\n\ | |
929 | automatically when the inferior begins execution or when the dynamic linker\n\ | |
930 | informs gdb that a new library has been loaded. Otherwise, symbols\n\ | |
931 | must be loaded manually, using `sharedlibrary'.", | |
932 | &setlist), | |
933 | &showlist); | |
934 | } |