1 /* Definitions for targets which report shared library events.
3 Copyright (C) 2007-2015 Free Software Foundation, Inc.
5 This file is part of GDB.
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
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
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.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
27 #include "solib-target.h"
30 /* Private data for each loaded library. */
33 /* The library's name. The name is normally kept in the struct
34 so_list; it is only here during XML parsing. */
37 /* The target can either specify segment bases or section bases, not
40 /* The base addresses for each independently relocatable segment of
41 this shared library. */
42 VEC(CORE_ADDR) *segment_bases;
44 /* The base addresses for each independently allocatable,
45 relocatable section of this shared library. */
46 VEC(CORE_ADDR) *section_bases;
48 /* The cached offsets for each section of this shared library,
49 determined from SEGMENT_BASES, or SECTION_BASES. */
50 struct section_offsets *offsets;
53 typedef struct lm_info *lm_info_p;
56 #if !defined(HAVE_LIBEXPAT)
58 static VEC(lm_info_p) *
59 solib_target_parse_libraries (const char *library)
61 static int have_warned;
66 warning (_("Can not parse XML library list; XML support was disabled "
73 #else /* HAVE_LIBEXPAT */
75 #include "xml-support.h"
77 /* Handle the start of a <segment> element. */
80 library_list_start_segment (struct gdb_xml_parser *parser,
81 const struct gdb_xml_element *element,
82 void *user_data, VEC(gdb_xml_value_s) *attributes)
84 VEC(lm_info_p) **list = user_data;
85 struct lm_info *last = VEC_last (lm_info_p, *list);
86 ULONGEST *address_p = xml_find_attribute (attributes, "address")->value;
87 CORE_ADDR address = (CORE_ADDR) *address_p;
89 if (last->section_bases != NULL)
90 gdb_xml_error (parser,
91 _("Library list with both segments and sections"));
93 VEC_safe_push (CORE_ADDR, last->segment_bases, address);
97 library_list_start_section (struct gdb_xml_parser *parser,
98 const struct gdb_xml_element *element,
99 void *user_data, VEC(gdb_xml_value_s) *attributes)
101 VEC(lm_info_p) **list = user_data;
102 struct lm_info *last = VEC_last (lm_info_p, *list);
103 ULONGEST *address_p = xml_find_attribute (attributes, "address")->value;
104 CORE_ADDR address = (CORE_ADDR) *address_p;
106 if (last->segment_bases != NULL)
107 gdb_xml_error (parser,
108 _("Library list with both segments and sections"));
110 VEC_safe_push (CORE_ADDR, last->section_bases, address);
113 /* Handle the start of a <library> element. */
116 library_list_start_library (struct gdb_xml_parser *parser,
117 const struct gdb_xml_element *element,
118 void *user_data, VEC(gdb_xml_value_s) *attributes)
120 VEC(lm_info_p) **list = user_data;
121 struct lm_info *item = XCNEW (struct lm_info);
122 const char *name = xml_find_attribute (attributes, "name")->value;
124 item->name = xstrdup (name);
125 VEC_safe_push (lm_info_p, *list, item);
129 library_list_end_library (struct gdb_xml_parser *parser,
130 const struct gdb_xml_element *element,
131 void *user_data, const char *body_text)
133 VEC(lm_info_p) **list = user_data;
134 struct lm_info *lm_info = VEC_last (lm_info_p, *list);
136 if (lm_info->segment_bases == NULL
137 && lm_info->section_bases == NULL)
138 gdb_xml_error (parser,
139 _("No segment or section bases defined"));
143 /* Handle the start of a <library-list> element. */
146 library_list_start_list (struct gdb_xml_parser *parser,
147 const struct gdb_xml_element *element,
148 void *user_data, VEC(gdb_xml_value_s) *attributes)
150 struct gdb_xml_value *version = xml_find_attribute (attributes, "version");
152 /* #FIXED attribute may be omitted, Expat returns NULL in such case. */
155 const char *string = version->value;
157 if (strcmp (string, "1.0") != 0)
158 gdb_xml_error (parser,
159 _("Library list has unsupported version \"%s\""),
164 /* Discard the constructed library list. */
167 solib_target_free_library_list (void *p)
169 VEC(lm_info_p) **result = p;
170 struct lm_info *info;
173 for (ix = 0; VEC_iterate (lm_info_p, *result, ix, info); ix++)
176 VEC_free (CORE_ADDR, info->segment_bases);
177 VEC_free (CORE_ADDR, info->section_bases);
180 VEC_free (lm_info_p, *result);
184 /* The allowed elements and attributes for an XML library list.
185 The root element is a <library-list>. */
187 static const struct gdb_xml_attribute segment_attributes[] = {
188 { "address", GDB_XML_AF_NONE, gdb_xml_parse_attr_ulongest, NULL },
189 { NULL, GDB_XML_AF_NONE, NULL, NULL }
192 static const struct gdb_xml_attribute section_attributes[] = {
193 { "address", GDB_XML_AF_NONE, gdb_xml_parse_attr_ulongest, NULL },
194 { NULL, GDB_XML_AF_NONE, NULL, NULL }
197 static const struct gdb_xml_element library_children[] = {
198 { "segment", segment_attributes, NULL,
199 GDB_XML_EF_REPEATABLE | GDB_XML_EF_OPTIONAL,
200 library_list_start_segment, NULL },
201 { "section", section_attributes, NULL,
202 GDB_XML_EF_REPEATABLE | GDB_XML_EF_OPTIONAL,
203 library_list_start_section, NULL },
204 { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL }
207 static const struct gdb_xml_attribute library_attributes[] = {
208 { "name", GDB_XML_AF_NONE, NULL, NULL },
209 { NULL, GDB_XML_AF_NONE, NULL, NULL }
212 static const struct gdb_xml_element library_list_children[] = {
213 { "library", library_attributes, library_children,
214 GDB_XML_EF_REPEATABLE | GDB_XML_EF_OPTIONAL,
215 library_list_start_library, library_list_end_library },
216 { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL }
219 static const struct gdb_xml_attribute library_list_attributes[] = {
220 { "version", GDB_XML_AF_OPTIONAL, NULL, NULL },
221 { NULL, GDB_XML_AF_NONE, NULL, NULL }
224 static const struct gdb_xml_element library_list_elements[] = {
225 { "library-list", library_list_attributes, library_list_children,
226 GDB_XML_EF_NONE, library_list_start_list, NULL },
227 { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL }
230 static VEC(lm_info_p) *
231 solib_target_parse_libraries (const char *library)
233 VEC(lm_info_p) *result = NULL;
234 struct cleanup *back_to = make_cleanup (solib_target_free_library_list,
237 if (gdb_xml_parse_quick (_("target library list"), "library-list.dtd",
238 library_list_elements, library, &result) == 0)
240 /* Parsed successfully, keep the result. */
241 discard_cleanups (back_to);
245 do_cleanups (back_to);
250 static struct so_list *
251 solib_target_current_sos (void)
253 struct so_list *new_solib, *start = NULL, *last = NULL;
254 char *library_document;
255 struct cleanup *old_chain;
256 VEC(lm_info_p) *library_list;
257 struct lm_info *info;
260 /* Fetch the list of shared libraries. */
261 library_document = target_read_stralloc (¤t_target,
262 TARGET_OBJECT_LIBRARIES,
264 if (library_document == NULL)
267 /* solib_target_parse_libraries may throw, so we use a cleanup. */
268 old_chain = make_cleanup (xfree, library_document);
270 /* Parse the list. */
271 library_list = solib_target_parse_libraries (library_document);
273 /* library_document string is not needed behind this point. */
274 do_cleanups (old_chain);
276 if (library_list == NULL)
279 /* Build a struct so_list for each entry on the list. */
280 for (ix = 0; VEC_iterate (lm_info_p, library_list, ix, info); ix++)
282 new_solib = XCNEW (struct so_list);
283 strncpy (new_solib->so_name, info->name, SO_NAME_MAX_PATH_SIZE - 1);
284 new_solib->so_name[SO_NAME_MAX_PATH_SIZE - 1] = '\0';
285 strncpy (new_solib->so_original_name, info->name,
286 SO_NAME_MAX_PATH_SIZE - 1);
287 new_solib->so_original_name[SO_NAME_MAX_PATH_SIZE - 1] = '\0';
288 new_solib->lm_info = info;
290 /* We no longer need this copy of the name. */
294 /* Add it to the list. */
296 last = start = new_solib;
299 last->next = new_solib;
304 /* Free the library list, but not its members. */
305 VEC_free (lm_info_p, library_list);
311 solib_target_special_symbol_handling (void)
313 /* Nothing needed. */
317 solib_target_solib_create_inferior_hook (int from_tty)
319 /* Nothing needed. */
323 solib_target_clear_solib (void)
325 /* Nothing needed. */
329 solib_target_free_so (struct so_list *so)
331 gdb_assert (so->lm_info->name == NULL);
332 xfree (so->lm_info->offsets);
333 VEC_free (CORE_ADDR, so->lm_info->segment_bases);
338 solib_target_relocate_section_addresses (struct so_list *so,
339 struct target_section *sec)
343 /* Build the offset table only once per object file. We can not do
344 it any earlier, since we need to open the file first. */
345 if (so->lm_info->offsets == NULL)
347 int num_sections = gdb_bfd_count_sections (so->abfd);
349 so->lm_info->offsets = xzalloc (SIZEOF_N_SECTION_OFFSETS (num_sections));
351 if (so->lm_info->section_bases)
355 int num_section_bases
356 = VEC_length (CORE_ADDR, so->lm_info->section_bases);
357 int num_alloc_sections = 0;
359 for (i = 0, sect = so->abfd->sections;
361 i++, sect = sect->next)
362 if ((bfd_get_section_flags (so->abfd, sect) & SEC_ALLOC))
363 num_alloc_sections++;
365 if (num_alloc_sections != num_section_bases)
367 Could not relocate shared library \"%s\": wrong number of ALLOC sections"),
373 CORE_ADDR *section_bases;
375 section_bases = VEC_address (CORE_ADDR,
376 so->lm_info->section_bases);
378 so->addr_low = ~(CORE_ADDR) 0;
380 for (i = 0, sect = so->abfd->sections;
382 i++, sect = sect->next)
384 if (!(bfd_get_section_flags (so->abfd, sect) & SEC_ALLOC))
386 if (bfd_section_size (so->abfd, sect) > 0)
390 low = section_bases[i];
391 high = low + bfd_section_size (so->abfd, sect) - 1;
393 if (low < so->addr_low)
395 if (high > so->addr_high)
396 so->addr_high = high;
397 gdb_assert (so->addr_low <= so->addr_high);
400 so->lm_info->offsets->offsets[i]
401 = section_bases[bases_index];
405 so->addr_low = so->addr_high = 0;
406 gdb_assert (so->addr_low <= so->addr_high);
409 else if (so->lm_info->segment_bases)
411 struct symfile_segment_data *data;
413 data = get_symfile_segment_data (so->abfd);
416 Could not relocate shared library \"%s\": no segments"), so->so_name);
422 CORE_ADDR *segment_bases;
424 num_bases = VEC_length (CORE_ADDR, so->lm_info->segment_bases);
425 segment_bases = VEC_address (CORE_ADDR,
426 so->lm_info->segment_bases);
428 if (!symfile_map_offsets_to_segments (so->abfd, data,
429 so->lm_info->offsets,
430 num_bases, segment_bases))
432 Could not relocate shared library \"%s\": bad offsets"), so->so_name);
434 /* Find the range of addresses to report for this library in
435 "info sharedlibrary". Report any consecutive segments
436 which were relocated as a single unit. */
437 gdb_assert (num_bases > 0);
438 orig_delta = segment_bases[0] - data->segment_bases[0];
440 for (i = 1; i < data->num_segments; i++)
442 /* If we have run out of offsets, assume all
443 remaining segments have the same offset. */
447 /* If this segment does not have the same offset, do
448 not include it in the library's range. */
449 if (segment_bases[i] - data->segment_bases[i] != orig_delta)
453 so->addr_low = segment_bases[0];
454 so->addr_high = (data->segment_bases[i - 1]
455 + data->segment_sizes[i - 1]
457 gdb_assert (so->addr_low <= so->addr_high);
459 free_symfile_segment_data (data);
464 offset = so->lm_info->offsets->offsets[gdb_bfd_section_index
465 (sec->the_bfd_section->owner,
466 sec->the_bfd_section)];
468 sec->endaddr += offset;
472 solib_target_open_symbol_file_object (void *from_ttyp)
474 /* We can't locate the main symbol file based on the target's
475 knowledge; the user has to specify it. */
480 solib_target_in_dynsym_resolve_code (CORE_ADDR pc)
482 /* We don't have a range of addresses for the dynamic linker; there
483 may not be one in the program's address space. So only report
484 PLT entries (which may be import stubs). */
485 return in_plt_section (pc);
488 struct target_so_ops solib_target_so_ops;
490 /* -Wmissing-prototypes */
491 extern initialize_file_ftype _initialize_solib_target;
494 _initialize_solib_target (void)
496 solib_target_so_ops.relocate_section_addresses
497 = solib_target_relocate_section_addresses;
498 solib_target_so_ops.free_so = solib_target_free_so;
499 solib_target_so_ops.clear_solib = solib_target_clear_solib;
500 solib_target_so_ops.solib_create_inferior_hook
501 = solib_target_solib_create_inferior_hook;
502 solib_target_so_ops.special_symbol_handling
503 = solib_target_special_symbol_handling;
504 solib_target_so_ops.current_sos = solib_target_current_sos;
505 solib_target_so_ops.open_symbol_file_object
506 = solib_target_open_symbol_file_object;
507 solib_target_so_ops.in_dynsym_resolve_code
508 = solib_target_in_dynsym_resolve_code;
509 solib_target_so_ops.bfd_open = solib_bfd_open;
510 solib_target_so_ops.validate = default_solib_validate;
512 /* Set current_target_so_ops to solib_target_so_ops if not already
514 if (current_target_so_ops == 0)
515 current_target_so_ops = &solib_target_so_ops;