Commit | Line | Data |
---|---|---|
cfa9d6d9 DJ |
1 | /* Definitions for targets which report shared library events. |
2 | ||
3 | Copyright (C) 2007 | |
4 | Free Software Foundation, Inc. | |
5 | ||
6 | This file is part of GDB. | |
7 | ||
8 | This program is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 10 | the Free Software Foundation; either version 3 of the License, or |
cfa9d6d9 DJ |
11 | (at your option) any later version. |
12 | ||
13 | This program is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 19 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
cfa9d6d9 DJ |
20 | |
21 | #include "defs.h" | |
22 | #include "objfiles.h" | |
23 | #include "solist.h" | |
24 | #include "symtab.h" | |
25 | #include "symfile.h" | |
26 | #include "target.h" | |
27 | #include "vec.h" | |
8d465389 | 28 | #include "solib-target.h" |
cfa9d6d9 DJ |
29 | |
30 | #include "gdb_string.h" | |
31 | ||
32 | DEF_VEC_O(CORE_ADDR); | |
33 | ||
34 | /* Private data for each loaded library. */ | |
35 | struct lm_info | |
36 | { | |
37 | /* The library's name. The name is normally kept in the struct | |
38 | so_list; it is only here during XML parsing. */ | |
39 | char *name; | |
40 | ||
41 | /* The base addresses for each independently relocatable segment of | |
42 | this shared library. */ | |
43 | VEC(CORE_ADDR) *segment_bases; | |
44 | ||
45 | /* The cached offsets for each section of this shared library, | |
46 | determined from SEGMENT_BASES. */ | |
47 | struct section_offsets *offsets; | |
48 | }; | |
49 | ||
50 | typedef struct lm_info *lm_info_p; | |
51 | DEF_VEC_P(lm_info_p); | |
52 | ||
53 | #if !defined(HAVE_LIBEXPAT) | |
54 | ||
899cff7a | 55 | static VEC(lm_info_p) * |
cfa9d6d9 DJ |
56 | solib_target_parse_libraries (const char *library) |
57 | { | |
58 | static int have_warned; | |
59 | ||
60 | if (!have_warned) | |
61 | { | |
62 | have_warned = 1; | |
63 | warning (_("Can not parse XML library list; XML support was disabled " | |
64 | "at compile time")); | |
65 | } | |
66 | ||
67 | return NULL; | |
68 | } | |
69 | ||
70 | #else /* HAVE_LIBEXPAT */ | |
71 | ||
72 | #include "xml-support.h" | |
73 | ||
74 | /* Handle the start of a <segment> element. */ | |
75 | ||
76 | static void | |
77 | library_list_start_segment (struct gdb_xml_parser *parser, | |
78 | const struct gdb_xml_element *element, | |
79 | void *user_data, VEC(gdb_xml_value_s) *attributes) | |
80 | { | |
81 | VEC(lm_info_p) **list = user_data; | |
82 | struct lm_info *last = VEC_last (lm_info_p, *list); | |
83 | ULONGEST *address_p = VEC_index (gdb_xml_value_s, attributes, 0)->value; | |
358eb95e | 84 | CORE_ADDR address = (CORE_ADDR) *address_p; |
cfa9d6d9 | 85 | |
358eb95e | 86 | VEC_safe_push (CORE_ADDR, last->segment_bases, &address); |
cfa9d6d9 DJ |
87 | } |
88 | ||
89 | /* Handle the start of a <library> element. */ | |
90 | ||
91 | static void | |
92 | library_list_start_library (struct gdb_xml_parser *parser, | |
93 | const struct gdb_xml_element *element, | |
94 | void *user_data, VEC(gdb_xml_value_s) *attributes) | |
95 | { | |
96 | VEC(lm_info_p) **list = user_data; | |
97 | struct lm_info *item = XZALLOC (struct lm_info); | |
98 | const char *name = VEC_index (gdb_xml_value_s, attributes, 0)->value; | |
99 | ||
100 | item->name = xstrdup (name); | |
101 | VEC_safe_push (lm_info_p, *list, item); | |
102 | } | |
103 | ||
104 | /* Handle the start of a <library-list> element. */ | |
105 | ||
106 | static void | |
107 | library_list_start_list (struct gdb_xml_parser *parser, | |
108 | const struct gdb_xml_element *element, | |
109 | void *user_data, VEC(gdb_xml_value_s) *attributes) | |
110 | { | |
111 | char *version = VEC_index (gdb_xml_value_s, attributes, 0)->value; | |
112 | ||
113 | if (strcmp (version, "1.0") != 0) | |
114 | gdb_xml_error (parser, | |
115 | _("Library list has unsupported version \"%s\""), | |
116 | version); | |
117 | } | |
118 | ||
119 | /* Discard the constructed library list. */ | |
120 | ||
121 | static void | |
122 | solib_target_free_library_list (void *p) | |
123 | { | |
124 | VEC(lm_info_p) **result = p; | |
125 | struct lm_info *info; | |
126 | int ix; | |
127 | ||
128 | for (ix = 0; VEC_iterate (lm_info_p, *result, ix, info); ix++) | |
129 | { | |
130 | xfree (info->name); | |
131 | VEC_free (CORE_ADDR, info->segment_bases); | |
132 | xfree (info); | |
133 | } | |
134 | VEC_free (lm_info_p, *result); | |
135 | *result = NULL; | |
136 | } | |
137 | ||
138 | /* The allowed elements and attributes for an XML library list. | |
139 | The root element is a <library-list>. */ | |
140 | ||
141 | const struct gdb_xml_attribute segment_attributes[] = { | |
142 | { "address", GDB_XML_AF_NONE, gdb_xml_parse_attr_ulongest, NULL }, | |
143 | { NULL, GDB_XML_AF_NONE, NULL, NULL } | |
144 | }; | |
145 | ||
146 | const struct gdb_xml_element library_children[] = { | |
147 | { "segment", segment_attributes, NULL, GDB_XML_EF_REPEATABLE, | |
148 | library_list_start_segment, NULL }, | |
149 | { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL } | |
150 | }; | |
151 | ||
152 | const struct gdb_xml_attribute library_attributes[] = { | |
153 | { "name", GDB_XML_AF_NONE, NULL, NULL }, | |
154 | { NULL, GDB_XML_AF_NONE, NULL, NULL } | |
155 | }; | |
156 | ||
157 | const struct gdb_xml_element library_list_children[] = { | |
158 | { "library", library_attributes, library_children, | |
159 | GDB_XML_EF_REPEATABLE | GDB_XML_EF_OPTIONAL, | |
160 | library_list_start_library, NULL }, | |
161 | { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL } | |
162 | }; | |
163 | ||
164 | const struct gdb_xml_attribute library_list_attributes[] = { | |
165 | { "version", GDB_XML_AF_NONE, NULL, NULL }, | |
166 | { NULL, GDB_XML_AF_NONE, NULL, NULL } | |
167 | }; | |
168 | ||
169 | const struct gdb_xml_element library_list_elements[] = { | |
170 | { "library-list", library_list_attributes, library_list_children, | |
171 | GDB_XML_EF_NONE, library_list_start_list, NULL }, | |
172 | { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL } | |
173 | }; | |
174 | ||
175 | static VEC(lm_info_p) * | |
176 | solib_target_parse_libraries (const char *library) | |
177 | { | |
178 | struct gdb_xml_parser *parser; | |
179 | VEC(lm_info_p) *result = NULL; | |
180 | struct cleanup *before_deleting_result, *back_to; | |
181 | ||
182 | back_to = make_cleanup (null_cleanup, NULL); | |
183 | parser = gdb_xml_create_parser_and_cleanup (_("target library list"), | |
184 | library_list_elements, &result); | |
185 | gdb_xml_use_dtd (parser, "library-list.dtd"); | |
186 | ||
187 | before_deleting_result = make_cleanup (solib_target_free_library_list, | |
188 | &result); | |
189 | ||
190 | if (gdb_xml_parse (parser, library) == 0) | |
191 | /* Parsed successfully, don't need to delete the result. */ | |
192 | discard_cleanups (before_deleting_result); | |
193 | ||
194 | do_cleanups (back_to); | |
195 | return result; | |
196 | } | |
197 | #endif | |
198 | ||
199 | static struct so_list * | |
200 | solib_target_current_sos (void) | |
201 | { | |
202 | struct so_list *new_solib, *start = NULL, *last = NULL; | |
203 | const char *library_document; | |
204 | VEC(lm_info_p) *library_list; | |
205 | struct lm_info *info; | |
206 | int ix; | |
207 | ||
208 | /* Fetch the list of shared libraries. */ | |
209 | library_document = target_read_stralloc (¤t_target, | |
210 | TARGET_OBJECT_LIBRARIES, | |
211 | NULL); | |
212 | if (library_document == NULL) | |
213 | return NULL; | |
214 | ||
215 | /* Parse the list. */ | |
216 | library_list = solib_target_parse_libraries (library_document); | |
217 | if (library_list == NULL) | |
218 | return NULL; | |
219 | ||
220 | /* Build a struct so_list for each entry on the list. */ | |
221 | for (ix = 0; VEC_iterate (lm_info_p, library_list, ix, info); ix++) | |
222 | { | |
223 | new_solib = XZALLOC (struct so_list); | |
224 | strncpy (new_solib->so_name, info->name, SO_NAME_MAX_PATH_SIZE - 1); | |
225 | new_solib->so_name[SO_NAME_MAX_PATH_SIZE - 1] = '\0'; | |
226 | strncpy (new_solib->so_original_name, info->name, | |
227 | SO_NAME_MAX_PATH_SIZE - 1); | |
228 | new_solib->so_original_name[SO_NAME_MAX_PATH_SIZE - 1] = '\0'; | |
229 | new_solib->lm_info = info; | |
230 | ||
231 | /* We no longer need this copy of the name. */ | |
232 | xfree (info->name); | |
233 | info->name = NULL; | |
234 | ||
235 | /* Add it to the list. */ | |
236 | if (!start) | |
237 | last = start = new_solib; | |
238 | else | |
239 | { | |
240 | last->next = new_solib; | |
241 | last = new_solib; | |
242 | } | |
243 | } | |
244 | ||
245 | /* Free the library list, but not its members. */ | |
246 | VEC_free (lm_info_p, library_list); | |
247 | ||
248 | return start; | |
249 | } | |
250 | ||
251 | static void | |
252 | solib_target_special_symbol_handling (void) | |
253 | { | |
254 | /* Nothing needed. */ | |
255 | } | |
256 | ||
257 | static void | |
258 | solib_target_solib_create_inferior_hook (void) | |
259 | { | |
260 | /* Nothing needed. */ | |
261 | } | |
262 | ||
263 | static void | |
264 | solib_target_clear_solib (void) | |
265 | { | |
266 | /* Nothing needed. */ | |
267 | } | |
268 | ||
269 | static void | |
270 | solib_target_free_so (struct so_list *so) | |
271 | { | |
272 | gdb_assert (so->lm_info->name == NULL); | |
273 | xfree (so->lm_info->offsets); | |
274 | VEC_free (CORE_ADDR, so->lm_info->segment_bases); | |
275 | xfree (so->lm_info); | |
276 | } | |
277 | ||
278 | static void | |
279 | solib_target_relocate_section_addresses (struct so_list *so, | |
280 | struct section_table *sec) | |
281 | { | |
282 | int flags = bfd_get_section_flags (sec->bfd, sec->the_bfd_section); | |
283 | CORE_ADDR offset; | |
284 | ||
285 | /* Build the offset table only once per object file. We can not do | |
286 | it any earlier, since we need to open the file first. */ | |
287 | if (so->lm_info->offsets == NULL) | |
288 | { | |
289 | struct symfile_segment_data *data; | |
290 | int num_sections = bfd_count_sections (so->abfd); | |
291 | ||
292 | so->lm_info->offsets = xzalloc (SIZEOF_N_SECTION_OFFSETS (num_sections)); | |
293 | ||
294 | data = get_symfile_segment_data (so->abfd); | |
295 | if (data == NULL) | |
296 | warning (_("Could not relocate shared library \"%s\": no segments"), | |
297 | so->so_name); | |
298 | else | |
299 | { | |
300 | ULONGEST orig_delta; | |
301 | int i; | |
302 | int num_bases = VEC_length (CORE_ADDR, so->lm_info->segment_bases); | |
303 | CORE_ADDR *segment_bases = VEC_address (CORE_ADDR, | |
304 | so->lm_info->segment_bases); | |
305 | ||
306 | if (!symfile_map_offsets_to_segments (so->abfd, data, | |
307 | so->lm_info->offsets, | |
308 | num_bases, segment_bases)) | |
309 | warning (_("Could not relocate shared library \"%s\": bad offsets"), | |
310 | so->so_name); | |
311 | ||
312 | /* Find the range of addresses to report for this library in | |
313 | "info sharedlibrary". Report any consecutive segments | |
314 | which were relocated as a single unit. */ | |
315 | gdb_assert (num_bases > 0); | |
316 | orig_delta = segment_bases[0] - data->segment_bases[0]; | |
317 | ||
318 | for (i = 1; i < data->num_segments; i++) | |
319 | { | |
320 | /* If we have run out of offsets, assume all remaining segments | |
321 | have the same offset. */ | |
322 | if (i >= num_bases) | |
323 | continue; | |
324 | ||
325 | /* If this segment does not have the same offset, do not include | |
326 | it in the library's range. */ | |
327 | if (segment_bases[i] - data->segment_bases[i] != orig_delta) | |
328 | break; | |
329 | } | |
330 | ||
331 | so->addr_low = segment_bases[0]; | |
332 | so->addr_high = (data->segment_bases[i - 1] | |
333 | + data->segment_sizes[i - 1] | |
5d9643ba PA |
334 | + orig_delta); |
335 | gdb_assert (so->addr_low <= so->addr_high); | |
cfa9d6d9 DJ |
336 | |
337 | free_symfile_segment_data (data); | |
338 | } | |
339 | } | |
340 | ||
341 | offset = so->lm_info->offsets->offsets[sec->the_bfd_section->index]; | |
342 | sec->addr += offset; | |
343 | sec->endaddr += offset; | |
344 | } | |
345 | ||
346 | static int | |
347 | solib_target_open_symbol_file_object (void *from_ttyp) | |
348 | { | |
349 | /* We can't locate the main symbol file based on the target's | |
350 | knowledge; the user has to specify it. */ | |
351 | return 0; | |
352 | } | |
353 | ||
354 | static int | |
355 | solib_target_in_dynsym_resolve_code (CORE_ADDR pc) | |
356 | { | |
357 | /* We don't have a range of addresses for the dynamic linker; there | |
358 | may not be one in the program's address space. So only report | |
359 | PLT entries (which may be import stubs). */ | |
360 | return in_plt_section (pc, NULL); | |
361 | } | |
362 | ||
8d465389 | 363 | struct target_so_ops solib_target_so_ops; |
cfa9d6d9 DJ |
364 | |
365 | extern initialize_file_ftype _initialize_solib_target; /* -Wmissing-prototypes */ | |
366 | ||
367 | void | |
368 | _initialize_solib_target (void) | |
369 | { | |
370 | solib_target_so_ops.relocate_section_addresses | |
371 | = solib_target_relocate_section_addresses; | |
372 | solib_target_so_ops.free_so = solib_target_free_so; | |
373 | solib_target_so_ops.clear_solib = solib_target_clear_solib; | |
374 | solib_target_so_ops.solib_create_inferior_hook | |
375 | = solib_target_solib_create_inferior_hook; | |
376 | solib_target_so_ops.special_symbol_handling | |
377 | = solib_target_special_symbol_handling; | |
378 | solib_target_so_ops.current_sos = solib_target_current_sos; | |
379 | solib_target_so_ops.open_symbol_file_object | |
380 | = solib_target_open_symbol_file_object; | |
381 | solib_target_so_ops.in_dynsym_resolve_code | |
382 | = solib_target_in_dynsym_resolve_code; | |
cfa9d6d9 | 383 | } |