1 /* Definitions for targets which report shared library events.
3 Copyright (C) 2007-2017 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"
29 /* Private data for each loaded library. */
32 /* The library's name. The name is normally kept in the struct
33 so_list; it is only here during XML parsing. */
36 /* The target can either specify segment bases or section bases, not
39 /* The base addresses for each independently relocatable segment of
40 this shared library. */
41 VEC(CORE_ADDR
) *segment_bases
;
43 /* The base addresses for each independently allocatable,
44 relocatable section of this shared library. */
45 VEC(CORE_ADDR
) *section_bases
;
47 /* The cached offsets for each section of this shared library,
48 determined from SEGMENT_BASES, or SECTION_BASES. */
49 struct section_offsets
*offsets
;
52 typedef struct lm_info
*lm_info_p
;
55 #if !defined(HAVE_LIBEXPAT)
57 static VEC(lm_info_p
) *
58 solib_target_parse_libraries (const char *library
)
60 static int have_warned
;
65 warning (_("Can not parse XML library list; XML support was disabled "
72 #else /* HAVE_LIBEXPAT */
74 #include "xml-support.h"
76 /* Handle the start of a <segment> element. */
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
)
83 VEC(lm_info_p
) **list
= (VEC(lm_info_p
) **) user_data
;
84 struct lm_info
*last
= VEC_last (lm_info_p
, *list
);
86 = (ULONGEST
*) 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
= (VEC(lm_info_p
) **) user_data
;
102 struct lm_info
*last
= VEC_last (lm_info_p
, *list
);
104 = (ULONGEST
*) xml_find_attribute (attributes
, "address")->value
;
105 CORE_ADDR address
= (CORE_ADDR
) *address_p
;
107 if (last
->segment_bases
!= NULL
)
108 gdb_xml_error (parser
,
109 _("Library list with both segments and sections"));
111 VEC_safe_push (CORE_ADDR
, last
->section_bases
, address
);
114 /* Handle the start of a <library> element. */
117 library_list_start_library (struct gdb_xml_parser
*parser
,
118 const struct gdb_xml_element
*element
,
119 void *user_data
, VEC(gdb_xml_value_s
) *attributes
)
121 VEC(lm_info_p
) **list
= (VEC(lm_info_p
) **) user_data
;
122 struct lm_info
*item
= XCNEW (struct lm_info
);
124 = (const char *) xml_find_attribute (attributes
, "name")->value
;
126 item
->name
= xstrdup (name
);
127 VEC_safe_push (lm_info_p
, *list
, item
);
131 library_list_end_library (struct gdb_xml_parser
*parser
,
132 const struct gdb_xml_element
*element
,
133 void *user_data
, const char *body_text
)
135 VEC(lm_info_p
) **list
= (VEC(lm_info_p
) **) user_data
;
136 struct lm_info
*lm_info
= VEC_last (lm_info_p
, *list
);
138 if (lm_info
->segment_bases
== NULL
139 && lm_info
->section_bases
== NULL
)
140 gdb_xml_error (parser
,
141 _("No segment or section bases defined"));
145 /* Handle the start of a <library-list> element. */
148 library_list_start_list (struct gdb_xml_parser
*parser
,
149 const struct gdb_xml_element
*element
,
150 void *user_data
, VEC(gdb_xml_value_s
) *attributes
)
152 struct gdb_xml_value
*version
= xml_find_attribute (attributes
, "version");
154 /* #FIXED attribute may be omitted, Expat returns NULL in such case. */
157 const char *string
= (const char *) version
->value
;
159 if (strcmp (string
, "1.0") != 0)
160 gdb_xml_error (parser
,
161 _("Library list has unsupported version \"%s\""),
166 /* Discard the constructed library list. */
169 solib_target_free_library_list (void *p
)
171 VEC(lm_info_p
) **result
= (VEC(lm_info_p
) **) p
;
172 struct lm_info
*info
;
175 for (ix
= 0; VEC_iterate (lm_info_p
, *result
, ix
, info
); ix
++)
178 VEC_free (CORE_ADDR
, info
->segment_bases
);
179 VEC_free (CORE_ADDR
, info
->section_bases
);
182 VEC_free (lm_info_p
, *result
);
186 /* The allowed elements and attributes for an XML library list.
187 The root element is a <library-list>. */
189 static const struct gdb_xml_attribute segment_attributes
[] = {
190 { "address", GDB_XML_AF_NONE
, gdb_xml_parse_attr_ulongest
, NULL
},
191 { NULL
, GDB_XML_AF_NONE
, NULL
, NULL
}
194 static const struct gdb_xml_attribute section_attributes
[] = {
195 { "address", GDB_XML_AF_NONE
, gdb_xml_parse_attr_ulongest
, NULL
},
196 { NULL
, GDB_XML_AF_NONE
, NULL
, NULL
}
199 static const struct gdb_xml_element library_children
[] = {
200 { "segment", segment_attributes
, NULL
,
201 GDB_XML_EF_REPEATABLE
| GDB_XML_EF_OPTIONAL
,
202 library_list_start_segment
, NULL
},
203 { "section", section_attributes
, NULL
,
204 GDB_XML_EF_REPEATABLE
| GDB_XML_EF_OPTIONAL
,
205 library_list_start_section
, NULL
},
206 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
209 static const struct gdb_xml_attribute library_attributes
[] = {
210 { "name", GDB_XML_AF_NONE
, NULL
, NULL
},
211 { NULL
, GDB_XML_AF_NONE
, NULL
, NULL
}
214 static const struct gdb_xml_element library_list_children
[] = {
215 { "library", library_attributes
, library_children
,
216 GDB_XML_EF_REPEATABLE
| GDB_XML_EF_OPTIONAL
,
217 library_list_start_library
, library_list_end_library
},
218 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
221 static const struct gdb_xml_attribute library_list_attributes
[] = {
222 { "version", GDB_XML_AF_OPTIONAL
, NULL
, NULL
},
223 { NULL
, GDB_XML_AF_NONE
, NULL
, NULL
}
226 static const struct gdb_xml_element library_list_elements
[] = {
227 { "library-list", library_list_attributes
, library_list_children
,
228 GDB_XML_EF_NONE
, library_list_start_list
, NULL
},
229 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
232 static VEC(lm_info_p
) *
233 solib_target_parse_libraries (const char *library
)
235 VEC(lm_info_p
) *result
= NULL
;
236 struct cleanup
*back_to
= make_cleanup (solib_target_free_library_list
,
239 if (gdb_xml_parse_quick (_("target library list"), "library-list.dtd",
240 library_list_elements
, library
, &result
) == 0)
242 /* Parsed successfully, keep the result. */
243 discard_cleanups (back_to
);
247 do_cleanups (back_to
);
252 static struct so_list
*
253 solib_target_current_sos (void)
255 struct so_list
*new_solib
, *start
= NULL
, *last
= NULL
;
256 char *library_document
;
257 struct cleanup
*old_chain
;
258 VEC(lm_info_p
) *library_list
;
259 struct lm_info
*info
;
262 /* Fetch the list of shared libraries. */
263 library_document
= target_read_stralloc (¤t_target
,
264 TARGET_OBJECT_LIBRARIES
,
266 if (library_document
== NULL
)
269 /* solib_target_parse_libraries may throw, so we use a cleanup. */
270 old_chain
= make_cleanup (xfree
, library_document
);
272 /* Parse the list. */
273 library_list
= solib_target_parse_libraries (library_document
);
275 /* library_document string is not needed behind this point. */
276 do_cleanups (old_chain
);
278 if (library_list
== NULL
)
281 /* Build a struct so_list for each entry on the list. */
282 for (ix
= 0; VEC_iterate (lm_info_p
, library_list
, ix
, info
); ix
++)
284 new_solib
= XCNEW (struct so_list
);
285 strncpy (new_solib
->so_name
, info
->name
, SO_NAME_MAX_PATH_SIZE
- 1);
286 new_solib
->so_name
[SO_NAME_MAX_PATH_SIZE
- 1] = '\0';
287 strncpy (new_solib
->so_original_name
, info
->name
,
288 SO_NAME_MAX_PATH_SIZE
- 1);
289 new_solib
->so_original_name
[SO_NAME_MAX_PATH_SIZE
- 1] = '\0';
290 new_solib
->lm_info
= info
;
292 /* We no longer need this copy of the name. */
296 /* Add it to the list. */
298 last
= start
= new_solib
;
301 last
->next
= new_solib
;
306 /* Free the library list, but not its members. */
307 VEC_free (lm_info_p
, library_list
);
313 solib_target_solib_create_inferior_hook (int from_tty
)
315 /* Nothing needed. */
319 solib_target_clear_solib (void)
321 /* Nothing needed. */
325 solib_target_free_so (struct so_list
*so
)
327 gdb_assert (so
->lm_info
->name
== NULL
);
328 xfree (so
->lm_info
->offsets
);
329 VEC_free (CORE_ADDR
, so
->lm_info
->segment_bases
);
334 solib_target_relocate_section_addresses (struct so_list
*so
,
335 struct target_section
*sec
)
339 /* Build the offset table only once per object file. We can not do
340 it any earlier, since we need to open the file first. */
341 if (so
->lm_info
->offsets
== NULL
)
343 int num_sections
= gdb_bfd_count_sections (so
->abfd
);
346 = ((struct section_offsets
*)
347 xzalloc (SIZEOF_N_SECTION_OFFSETS (num_sections
)));
349 if (so
->lm_info
->section_bases
)
353 int num_section_bases
354 = VEC_length (CORE_ADDR
, so
->lm_info
->section_bases
);
355 int num_alloc_sections
= 0;
357 for (i
= 0, sect
= so
->abfd
->sections
;
359 i
++, sect
= sect
->next
)
360 if ((bfd_get_section_flags (so
->abfd
, sect
) & SEC_ALLOC
))
361 num_alloc_sections
++;
363 if (num_alloc_sections
!= num_section_bases
)
365 Could not relocate shared library \"%s\": wrong number of ALLOC sections"),
371 CORE_ADDR
*section_bases
;
373 section_bases
= VEC_address (CORE_ADDR
,
374 so
->lm_info
->section_bases
);
376 so
->addr_low
= ~(CORE_ADDR
) 0;
378 for (i
= 0, sect
= so
->abfd
->sections
;
380 i
++, sect
= sect
->next
)
382 if (!(bfd_get_section_flags (so
->abfd
, sect
) & SEC_ALLOC
))
384 if (bfd_section_size (so
->abfd
, sect
) > 0)
388 low
= section_bases
[i
];
389 high
= low
+ bfd_section_size (so
->abfd
, sect
) - 1;
391 if (low
< so
->addr_low
)
393 if (high
> so
->addr_high
)
394 so
->addr_high
= high
;
395 gdb_assert (so
->addr_low
<= so
->addr_high
);
398 so
->lm_info
->offsets
->offsets
[i
]
399 = section_bases
[bases_index
];
403 so
->addr_low
= so
->addr_high
= 0;
404 gdb_assert (so
->addr_low
<= so
->addr_high
);
407 else if (so
->lm_info
->segment_bases
)
409 struct symfile_segment_data
*data
;
411 data
= get_symfile_segment_data (so
->abfd
);
414 Could not relocate shared library \"%s\": no segments"), so
->so_name
);
420 CORE_ADDR
*segment_bases
;
422 num_bases
= VEC_length (CORE_ADDR
, so
->lm_info
->segment_bases
);
423 segment_bases
= VEC_address (CORE_ADDR
,
424 so
->lm_info
->segment_bases
);
426 if (!symfile_map_offsets_to_segments (so
->abfd
, data
,
427 so
->lm_info
->offsets
,
428 num_bases
, segment_bases
))
430 Could not relocate shared library \"%s\": bad offsets"), so
->so_name
);
432 /* Find the range of addresses to report for this library in
433 "info sharedlibrary". Report any consecutive segments
434 which were relocated as a single unit. */
435 gdb_assert (num_bases
> 0);
436 orig_delta
= segment_bases
[0] - data
->segment_bases
[0];
438 for (i
= 1; i
< data
->num_segments
; i
++)
440 /* If we have run out of offsets, assume all
441 remaining segments have the same offset. */
445 /* If this segment does not have the same offset, do
446 not include it in the library's range. */
447 if (segment_bases
[i
] - data
->segment_bases
[i
] != orig_delta
)
451 so
->addr_low
= segment_bases
[0];
452 so
->addr_high
= (data
->segment_bases
[i
- 1]
453 + data
->segment_sizes
[i
- 1]
455 gdb_assert (so
->addr_low
<= so
->addr_high
);
457 free_symfile_segment_data (data
);
462 offset
= so
->lm_info
->offsets
->offsets
[gdb_bfd_section_index
463 (sec
->the_bfd_section
->owner
,
464 sec
->the_bfd_section
)];
466 sec
->endaddr
+= offset
;
470 solib_target_open_symbol_file_object (void *from_ttyp
)
472 /* We can't locate the main symbol file based on the target's
473 knowledge; the user has to specify it. */
478 solib_target_in_dynsym_resolve_code (CORE_ADDR pc
)
480 /* We don't have a range of addresses for the dynamic linker; there
481 may not be one in the program's address space. So only report
482 PLT entries (which may be import stubs). */
483 return in_plt_section (pc
);
486 struct target_so_ops solib_target_so_ops
;
488 /* -Wmissing-prototypes */
489 extern initialize_file_ftype _initialize_solib_target
;
492 _initialize_solib_target (void)
494 solib_target_so_ops
.relocate_section_addresses
495 = solib_target_relocate_section_addresses
;
496 solib_target_so_ops
.free_so
= solib_target_free_so
;
497 solib_target_so_ops
.clear_solib
= solib_target_clear_solib
;
498 solib_target_so_ops
.solib_create_inferior_hook
499 = solib_target_solib_create_inferior_hook
;
500 solib_target_so_ops
.current_sos
= solib_target_current_sos
;
501 solib_target_so_ops
.open_symbol_file_object
502 = solib_target_open_symbol_file_object
;
503 solib_target_so_ops
.in_dynsym_resolve_code
504 = solib_target_in_dynsym_resolve_code
;
505 solib_target_so_ops
.bfd_open
= solib_bfd_open
;
507 /* Set current_target_so_ops to solib_target_so_ops if not already
509 if (current_target_so_ops
== 0)
510 current_target_so_ops
= &solib_target_so_ops
;