Commit | Line | Data |
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cfa9d6d9 DJ |
1 | /* Definitions for targets which report shared library events. |
2 | ||
32d0add0 | 3 | Copyright (C) 2007-2015 Free Software Foundation, Inc. |
cfa9d6d9 DJ |
4 | |
5 | This file is part of GDB. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 9 | the Free Software Foundation; either version 3 of the License, or |
cfa9d6d9 DJ |
10 | (at your option) any later version. |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
cfa9d6d9 DJ |
19 | |
20 | #include "defs.h" | |
21 | #include "objfiles.h" | |
22 | #include "solist.h" | |
23 | #include "symtab.h" | |
24 | #include "symfile.h" | |
25 | #include "target.h" | |
26 | #include "vec.h" | |
8d465389 | 27 | #include "solib-target.h" |
cfa9d6d9 | 28 | |
cfa9d6d9 DJ |
29 | /* Private data for each loaded library. */ |
30 | struct lm_info | |
31 | { | |
32 | /* The library's name. The name is normally kept in the struct | |
33 | so_list; it is only here during XML parsing. */ | |
34 | char *name; | |
35 | ||
1fddbabb PA |
36 | /* The target can either specify segment bases or section bases, not |
37 | both. */ | |
38 | ||
cfa9d6d9 DJ |
39 | /* The base addresses for each independently relocatable segment of |
40 | this shared library. */ | |
41 | VEC(CORE_ADDR) *segment_bases; | |
42 | ||
1fddbabb PA |
43 | /* The base addresses for each independently allocatable, |
44 | relocatable section of this shared library. */ | |
45 | VEC(CORE_ADDR) *section_bases; | |
46 | ||
cfa9d6d9 | 47 | /* The cached offsets for each section of this shared library, |
1fddbabb | 48 | determined from SEGMENT_BASES, or SECTION_BASES. */ |
cfa9d6d9 DJ |
49 | struct section_offsets *offsets; |
50 | }; | |
51 | ||
52 | typedef struct lm_info *lm_info_p; | |
53 | DEF_VEC_P(lm_info_p); | |
54 | ||
55 | #if !defined(HAVE_LIBEXPAT) | |
56 | ||
899cff7a | 57 | static VEC(lm_info_p) * |
cfa9d6d9 DJ |
58 | solib_target_parse_libraries (const char *library) |
59 | { | |
60 | static int have_warned; | |
61 | ||
62 | if (!have_warned) | |
63 | { | |
64 | have_warned = 1; | |
65 | warning (_("Can not parse XML library list; XML support was disabled " | |
66 | "at compile time")); | |
67 | } | |
68 | ||
69 | return NULL; | |
70 | } | |
71 | ||
72 | #else /* HAVE_LIBEXPAT */ | |
73 | ||
74 | #include "xml-support.h" | |
75 | ||
76 | /* Handle the start of a <segment> element. */ | |
77 | ||
78 | static void | |
79 | library_list_start_segment (struct gdb_xml_parser *parser, | |
80 | const struct gdb_xml_element *element, | |
81 | void *user_data, VEC(gdb_xml_value_s) *attributes) | |
82 | { | |
83 | VEC(lm_info_p) **list = user_data; | |
84 | struct lm_info *last = VEC_last (lm_info_p, *list); | |
3d2c1d41 | 85 | ULONGEST *address_p = xml_find_attribute (attributes, "address")->value; |
358eb95e | 86 | CORE_ADDR address = (CORE_ADDR) *address_p; |
cfa9d6d9 | 87 | |
1fddbabb PA |
88 | if (last->section_bases != NULL) |
89 | gdb_xml_error (parser, | |
90 | _("Library list with both segments and sections")); | |
91 | ||
267f6504 | 92 | VEC_safe_push (CORE_ADDR, last->segment_bases, address); |
cfa9d6d9 DJ |
93 | } |
94 | ||
1fddbabb PA |
95 | static void |
96 | library_list_start_section (struct gdb_xml_parser *parser, | |
97 | const struct gdb_xml_element *element, | |
98 | void *user_data, VEC(gdb_xml_value_s) *attributes) | |
99 | { | |
100 | VEC(lm_info_p) **list = user_data; | |
101 | struct lm_info *last = VEC_last (lm_info_p, *list); | |
3d2c1d41 | 102 | ULONGEST *address_p = xml_find_attribute (attributes, "address")->value; |
1fddbabb PA |
103 | CORE_ADDR address = (CORE_ADDR) *address_p; |
104 | ||
105 | if (last->segment_bases != NULL) | |
106 | gdb_xml_error (parser, | |
107 | _("Library list with both segments and sections")); | |
108 | ||
267f6504 | 109 | VEC_safe_push (CORE_ADDR, last->section_bases, address); |
1fddbabb PA |
110 | } |
111 | ||
cfa9d6d9 DJ |
112 | /* Handle the start of a <library> element. */ |
113 | ||
114 | static void | |
115 | library_list_start_library (struct gdb_xml_parser *parser, | |
116 | const struct gdb_xml_element *element, | |
117 | void *user_data, VEC(gdb_xml_value_s) *attributes) | |
118 | { | |
119 | VEC(lm_info_p) **list = user_data; | |
41bf6aca | 120 | struct lm_info *item = XCNEW (struct lm_info); |
3d2c1d41 | 121 | const char *name = xml_find_attribute (attributes, "name")->value; |
cfa9d6d9 DJ |
122 | |
123 | item->name = xstrdup (name); | |
124 | VEC_safe_push (lm_info_p, *list, item); | |
125 | } | |
126 | ||
1fddbabb PA |
127 | static void |
128 | library_list_end_library (struct gdb_xml_parser *parser, | |
129 | const struct gdb_xml_element *element, | |
130 | void *user_data, const char *body_text) | |
131 | { | |
132 | VEC(lm_info_p) **list = user_data; | |
133 | struct lm_info *lm_info = VEC_last (lm_info_p, *list); | |
433759f7 | 134 | |
1fddbabb PA |
135 | if (lm_info->segment_bases == NULL |
136 | && lm_info->section_bases == NULL) | |
137 | gdb_xml_error (parser, | |
138 | _("No segment or section bases defined")); | |
139 | } | |
140 | ||
141 | ||
cfa9d6d9 DJ |
142 | /* Handle the start of a <library-list> element. */ |
143 | ||
144 | static void | |
145 | library_list_start_list (struct gdb_xml_parser *parser, | |
146 | const struct gdb_xml_element *element, | |
147 | void *user_data, VEC(gdb_xml_value_s) *attributes) | |
148 | { | |
24c05f46 | 149 | struct gdb_xml_value *version = xml_find_attribute (attributes, "version"); |
cfa9d6d9 | 150 | |
24c05f46 | 151 | /* #FIXED attribute may be omitted, Expat returns NULL in such case. */ |
8847cac2 | 152 | if (version != NULL) |
24c05f46 JK |
153 | { |
154 | const char *string = version->value; | |
155 | ||
156 | if (strcmp (string, "1.0") != 0) | |
157 | gdb_xml_error (parser, | |
158 | _("Library list has unsupported version \"%s\""), | |
159 | version); | |
160 | } | |
cfa9d6d9 DJ |
161 | } |
162 | ||
163 | /* Discard the constructed library list. */ | |
164 | ||
165 | static void | |
166 | solib_target_free_library_list (void *p) | |
167 | { | |
168 | VEC(lm_info_p) **result = p; | |
169 | struct lm_info *info; | |
170 | int ix; | |
171 | ||
172 | for (ix = 0; VEC_iterate (lm_info_p, *result, ix, info); ix++) | |
173 | { | |
174 | xfree (info->name); | |
175 | VEC_free (CORE_ADDR, info->segment_bases); | |
1fddbabb | 176 | VEC_free (CORE_ADDR, info->section_bases); |
cfa9d6d9 DJ |
177 | xfree (info); |
178 | } | |
179 | VEC_free (lm_info_p, *result); | |
180 | *result = NULL; | |
181 | } | |
182 | ||
183 | /* The allowed elements and attributes for an XML library list. | |
184 | The root element is a <library-list>. */ | |
185 | ||
d6c10e95 | 186 | static const struct gdb_xml_attribute segment_attributes[] = { |
cfa9d6d9 DJ |
187 | { "address", GDB_XML_AF_NONE, gdb_xml_parse_attr_ulongest, NULL }, |
188 | { NULL, GDB_XML_AF_NONE, NULL, NULL } | |
189 | }; | |
190 | ||
d6c10e95 | 191 | static const struct gdb_xml_attribute section_attributes[] = { |
1fddbabb PA |
192 | { "address", GDB_XML_AF_NONE, gdb_xml_parse_attr_ulongest, NULL }, |
193 | { NULL, GDB_XML_AF_NONE, NULL, NULL } | |
194 | }; | |
195 | ||
d6c10e95 | 196 | static const struct gdb_xml_element library_children[] = { |
1fddbabb PA |
197 | { "segment", segment_attributes, NULL, |
198 | GDB_XML_EF_REPEATABLE | GDB_XML_EF_OPTIONAL, | |
cfa9d6d9 | 199 | library_list_start_segment, NULL }, |
1fddbabb PA |
200 | { "section", section_attributes, NULL, |
201 | GDB_XML_EF_REPEATABLE | GDB_XML_EF_OPTIONAL, | |
202 | library_list_start_section, NULL }, | |
cfa9d6d9 DJ |
203 | { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL } |
204 | }; | |
205 | ||
d6c10e95 | 206 | static const struct gdb_xml_attribute library_attributes[] = { |
cfa9d6d9 DJ |
207 | { "name", GDB_XML_AF_NONE, NULL, NULL }, |
208 | { NULL, GDB_XML_AF_NONE, NULL, NULL } | |
209 | }; | |
210 | ||
d6c10e95 | 211 | static const struct gdb_xml_element library_list_children[] = { |
cfa9d6d9 DJ |
212 | { "library", library_attributes, library_children, |
213 | GDB_XML_EF_REPEATABLE | GDB_XML_EF_OPTIONAL, | |
1fddbabb | 214 | library_list_start_library, library_list_end_library }, |
cfa9d6d9 DJ |
215 | { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL } |
216 | }; | |
217 | ||
d6c10e95 | 218 | static const struct gdb_xml_attribute library_list_attributes[] = { |
24c05f46 | 219 | { "version", GDB_XML_AF_OPTIONAL, NULL, NULL }, |
cfa9d6d9 DJ |
220 | { NULL, GDB_XML_AF_NONE, NULL, NULL } |
221 | }; | |
222 | ||
d6c10e95 | 223 | static const struct gdb_xml_element library_list_elements[] = { |
cfa9d6d9 DJ |
224 | { "library-list", library_list_attributes, library_list_children, |
225 | GDB_XML_EF_NONE, library_list_start_list, NULL }, | |
226 | { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL } | |
227 | }; | |
228 | ||
229 | static VEC(lm_info_p) * | |
230 | solib_target_parse_libraries (const char *library) | |
231 | { | |
cfa9d6d9 | 232 | VEC(lm_info_p) *result = NULL; |
efc0eabd PA |
233 | struct cleanup *back_to = make_cleanup (solib_target_free_library_list, |
234 | &result); | |
cfa9d6d9 | 235 | |
efc0eabd PA |
236 | if (gdb_xml_parse_quick (_("target library list"), "library-list.dtd", |
237 | library_list_elements, library, &result) == 0) | |
238 | { | |
239 | /* Parsed successfully, keep the result. */ | |
240 | discard_cleanups (back_to); | |
241 | return result; | |
242 | } | |
cfa9d6d9 DJ |
243 | |
244 | do_cleanups (back_to); | |
efc0eabd | 245 | return NULL; |
cfa9d6d9 DJ |
246 | } |
247 | #endif | |
248 | ||
249 | static struct so_list * | |
250 | solib_target_current_sos (void) | |
251 | { | |
252 | struct so_list *new_solib, *start = NULL, *last = NULL; | |
b25d79d4 PM |
253 | char *library_document; |
254 | struct cleanup *old_chain; | |
cfa9d6d9 DJ |
255 | VEC(lm_info_p) *library_list; |
256 | struct lm_info *info; | |
257 | int ix; | |
258 | ||
259 | /* Fetch the list of shared libraries. */ | |
260 | library_document = target_read_stralloc (¤t_target, | |
261 | TARGET_OBJECT_LIBRARIES, | |
262 | NULL); | |
263 | if (library_document == NULL) | |
264 | return NULL; | |
265 | ||
b25d79d4 PM |
266 | /* solib_target_parse_libraries may throw, so we use a cleanup. */ |
267 | old_chain = make_cleanup (xfree, library_document); | |
268 | ||
cfa9d6d9 DJ |
269 | /* Parse the list. */ |
270 | library_list = solib_target_parse_libraries (library_document); | |
b25d79d4 PM |
271 | |
272 | /* library_document string is not needed behind this point. */ | |
273 | do_cleanups (old_chain); | |
274 | ||
cfa9d6d9 DJ |
275 | if (library_list == NULL) |
276 | return NULL; | |
277 | ||
278 | /* Build a struct so_list for each entry on the list. */ | |
279 | for (ix = 0; VEC_iterate (lm_info_p, library_list, ix, info); ix++) | |
280 | { | |
41bf6aca | 281 | new_solib = XCNEW (struct so_list); |
cfa9d6d9 DJ |
282 | strncpy (new_solib->so_name, info->name, SO_NAME_MAX_PATH_SIZE - 1); |
283 | new_solib->so_name[SO_NAME_MAX_PATH_SIZE - 1] = '\0'; | |
284 | strncpy (new_solib->so_original_name, info->name, | |
285 | SO_NAME_MAX_PATH_SIZE - 1); | |
286 | new_solib->so_original_name[SO_NAME_MAX_PATH_SIZE - 1] = '\0'; | |
287 | new_solib->lm_info = info; | |
288 | ||
289 | /* We no longer need this copy of the name. */ | |
290 | xfree (info->name); | |
291 | info->name = NULL; | |
292 | ||
293 | /* Add it to the list. */ | |
294 | if (!start) | |
295 | last = start = new_solib; | |
296 | else | |
297 | { | |
298 | last->next = new_solib; | |
299 | last = new_solib; | |
300 | } | |
301 | } | |
302 | ||
303 | /* Free the library list, but not its members. */ | |
304 | VEC_free (lm_info_p, library_list); | |
305 | ||
306 | return start; | |
307 | } | |
308 | ||
309 | static void | |
310 | solib_target_special_symbol_handling (void) | |
311 | { | |
312 | /* Nothing needed. */ | |
313 | } | |
314 | ||
315 | static void | |
268a4a75 | 316 | solib_target_solib_create_inferior_hook (int from_tty) |
cfa9d6d9 DJ |
317 | { |
318 | /* Nothing needed. */ | |
319 | } | |
320 | ||
321 | static void | |
322 | solib_target_clear_solib (void) | |
323 | { | |
324 | /* Nothing needed. */ | |
325 | } | |
326 | ||
327 | static void | |
328 | solib_target_free_so (struct so_list *so) | |
329 | { | |
330 | gdb_assert (so->lm_info->name == NULL); | |
331 | xfree (so->lm_info->offsets); | |
332 | VEC_free (CORE_ADDR, so->lm_info->segment_bases); | |
333 | xfree (so->lm_info); | |
334 | } | |
335 | ||
336 | static void | |
337 | solib_target_relocate_section_addresses (struct so_list *so, | |
0542c86d | 338 | struct target_section *sec) |
cfa9d6d9 | 339 | { |
cfa9d6d9 DJ |
340 | CORE_ADDR offset; |
341 | ||
342 | /* Build the offset table only once per object file. We can not do | |
343 | it any earlier, since we need to open the file first. */ | |
344 | if (so->lm_info->offsets == NULL) | |
345 | { | |
d445b2f6 | 346 | int num_sections = gdb_bfd_count_sections (so->abfd); |
cfa9d6d9 DJ |
347 | |
348 | so->lm_info->offsets = xzalloc (SIZEOF_N_SECTION_OFFSETS (num_sections)); | |
349 | ||
1fddbabb | 350 | if (so->lm_info->section_bases) |
cfa9d6d9 | 351 | { |
cfa9d6d9 | 352 | int i; |
1fddbabb PA |
353 | asection *sect; |
354 | int num_section_bases | |
355 | = VEC_length (CORE_ADDR, so->lm_info->section_bases); | |
356 | int num_alloc_sections = 0; | |
357 | ||
358 | for (i = 0, sect = so->abfd->sections; | |
359 | sect != NULL; | |
360 | i++, sect = sect->next) | |
361 | if ((bfd_get_section_flags (so->abfd, sect) & SEC_ALLOC)) | |
362 | num_alloc_sections++; | |
363 | ||
364 | if (num_alloc_sections != num_section_bases) | |
365 | warning (_("\ | |
366 | Could not relocate shared library \"%s\": wrong number of ALLOC sections"), | |
cfa9d6d9 | 367 | so->so_name); |
1fddbabb | 368 | else |
cfa9d6d9 | 369 | { |
1fddbabb PA |
370 | int bases_index = 0; |
371 | int found_range = 0; | |
372 | CORE_ADDR *section_bases; | |
433759f7 | 373 | |
1fddbabb PA |
374 | section_bases = VEC_address (CORE_ADDR, |
375 | so->lm_info->section_bases); | |
376 | ||
377 | so->addr_low = ~(CORE_ADDR) 0; | |
378 | so->addr_high = 0; | |
379 | for (i = 0, sect = so->abfd->sections; | |
380 | sect != NULL; | |
381 | i++, sect = sect->next) | |
382 | { | |
383 | if (!(bfd_get_section_flags (so->abfd, sect) & SEC_ALLOC)) | |
384 | continue; | |
385 | if (bfd_section_size (so->abfd, sect) > 0) | |
386 | { | |
387 | CORE_ADDR low, high; | |
433759f7 | 388 | |
1fddbabb PA |
389 | low = section_bases[i]; |
390 | high = low + bfd_section_size (so->abfd, sect) - 1; | |
391 | ||
392 | if (low < so->addr_low) | |
393 | so->addr_low = low; | |
394 | if (high > so->addr_high) | |
395 | so->addr_high = high; | |
396 | gdb_assert (so->addr_low <= so->addr_high); | |
397 | found_range = 1; | |
398 | } | |
3e43a32a MS |
399 | so->lm_info->offsets->offsets[i] |
400 | = section_bases[bases_index]; | |
1fddbabb PA |
401 | bases_index++; |
402 | } | |
403 | if (!found_range) | |
404 | so->addr_low = so->addr_high = 0; | |
405 | gdb_assert (so->addr_low <= so->addr_high); | |
406 | } | |
407 | } | |
408 | else if (so->lm_info->segment_bases) | |
409 | { | |
410 | struct symfile_segment_data *data; | |
433759f7 | 411 | |
1fddbabb PA |
412 | data = get_symfile_segment_data (so->abfd); |
413 | if (data == NULL) | |
414 | warning (_("\ | |
415 | Could not relocate shared library \"%s\": no segments"), so->so_name); | |
416 | else | |
417 | { | |
418 | ULONGEST orig_delta; | |
419 | int i; | |
420 | int num_bases; | |
421 | CORE_ADDR *segment_bases; | |
422 | ||
423 | num_bases = VEC_length (CORE_ADDR, so->lm_info->segment_bases); | |
424 | segment_bases = VEC_address (CORE_ADDR, | |
425 | so->lm_info->segment_bases); | |
426 | ||
427 | if (!symfile_map_offsets_to_segments (so->abfd, data, | |
428 | so->lm_info->offsets, | |
429 | num_bases, segment_bases)) | |
430 | warning (_("\ | |
431 | Could not relocate shared library \"%s\": bad offsets"), so->so_name); | |
432 | ||
433 | /* Find the range of addresses to report for this library in | |
434 | "info sharedlibrary". Report any consecutive segments | |
435 | which were relocated as a single unit. */ | |
436 | gdb_assert (num_bases > 0); | |
437 | orig_delta = segment_bases[0] - data->segment_bases[0]; | |
438 | ||
439 | for (i = 1; i < data->num_segments; i++) | |
440 | { | |
441 | /* If we have run out of offsets, assume all | |
442 | remaining segments have the same offset. */ | |
443 | if (i >= num_bases) | |
444 | continue; | |
445 | ||
446 | /* If this segment does not have the same offset, do | |
447 | not include it in the library's range. */ | |
448 | if (segment_bases[i] - data->segment_bases[i] != orig_delta) | |
449 | break; | |
450 | } | |
451 | ||
452 | so->addr_low = segment_bases[0]; | |
453 | so->addr_high = (data->segment_bases[i - 1] | |
454 | + data->segment_sizes[i - 1] | |
455 | + orig_delta); | |
456 | gdb_assert (so->addr_low <= so->addr_high); | |
457 | ||
458 | free_symfile_segment_data (data); | |
cfa9d6d9 | 459 | } |
cfa9d6d9 DJ |
460 | } |
461 | } | |
462 | ||
2b2848e2 DE |
463 | offset = so->lm_info->offsets->offsets[gdb_bfd_section_index |
464 | (sec->the_bfd_section->owner, | |
465 | sec->the_bfd_section)]; | |
cfa9d6d9 DJ |
466 | sec->addr += offset; |
467 | sec->endaddr += offset; | |
468 | } | |
469 | ||
470 | static int | |
471 | solib_target_open_symbol_file_object (void *from_ttyp) | |
472 | { | |
473 | /* We can't locate the main symbol file based on the target's | |
474 | knowledge; the user has to specify it. */ | |
475 | return 0; | |
476 | } | |
477 | ||
478 | static int | |
479 | solib_target_in_dynsym_resolve_code (CORE_ADDR pc) | |
480 | { | |
481 | /* We don't have a range of addresses for the dynamic linker; there | |
482 | may not be one in the program's address space. So only report | |
483 | PLT entries (which may be import stubs). */ | |
3e5d3a5a | 484 | return in_plt_section (pc); |
cfa9d6d9 DJ |
485 | } |
486 | ||
8d465389 | 487 | struct target_so_ops solib_target_so_ops; |
cfa9d6d9 | 488 | |
3e43a32a MS |
489 | /* -Wmissing-prototypes */ |
490 | extern initialize_file_ftype _initialize_solib_target; | |
cfa9d6d9 DJ |
491 | |
492 | void | |
493 | _initialize_solib_target (void) | |
494 | { | |
495 | solib_target_so_ops.relocate_section_addresses | |
496 | = solib_target_relocate_section_addresses; | |
497 | solib_target_so_ops.free_so = solib_target_free_so; | |
498 | solib_target_so_ops.clear_solib = solib_target_clear_solib; | |
499 | solib_target_so_ops.solib_create_inferior_hook | |
500 | = solib_target_solib_create_inferior_hook; | |
501 | solib_target_so_ops.special_symbol_handling | |
502 | = solib_target_special_symbol_handling; | |
503 | solib_target_so_ops.current_sos = solib_target_current_sos; | |
504 | solib_target_so_ops.open_symbol_file_object | |
505 | = solib_target_open_symbol_file_object; | |
506 | solib_target_so_ops.in_dynsym_resolve_code | |
507 | = solib_target_in_dynsym_resolve_code; | |
831a0c44 | 508 | solib_target_so_ops.bfd_open = solib_bfd_open; |
98d64339 PA |
509 | |
510 | /* Set current_target_so_ops to solib_target_so_ops if not already | |
511 | set. */ | |
512 | if (current_target_so_ops == 0) | |
513 | current_target_so_ops = &solib_target_so_ops; | |
cfa9d6d9 | 514 | } |