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c906108c | 1 | /* Definitions for reading symbol files into GDB. |
3a6c3343 | 2 | |
6aba47ca | 3 | Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, |
4c38e0a4 | 4 | 2000, 2001, 2002, 2003, 2004, 2007, 2008, 2009, 2010 |
0fb0cc75 | 5 | Free Software Foundation, Inc. |
c906108c | 6 | |
c5aa993b | 7 | This file is part of GDB. |
c906108c | 8 | |
c5aa993b JM |
9 | This program is free software; you can redistribute it and/or modify |
10 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 11 | the Free Software Foundation; either version 3 of the License, or |
c5aa993b | 12 | (at your option) any later version. |
c906108c | 13 | |
c5aa993b JM |
14 | This program is distributed in the hope that it will be useful, |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
c906108c | 18 | |
c5aa993b | 19 | You should have received a copy of the GNU General Public License |
a9762ec7 | 20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c SS |
21 | |
22 | #if !defined (SYMFILE_H) | |
23 | #define SYMFILE_H | |
24 | ||
25 | /* This file requires that you first include "bfd.h". */ | |
16708cba | 26 | #include "symtab.h" |
c906108c | 27 | |
63ca651f | 28 | /* Opaque declarations. */ |
0542c86d | 29 | struct target_section; |
da3331ec | 30 | struct objfile; |
1c772458 | 31 | struct obj_section; |
63ca651f | 32 | struct obstack; |
fe898f56 | 33 | struct block; |
63ca651f | 34 | |
3a6c3343 AC |
35 | /* Partial symbols are stored in the psymbol_cache and pointers to |
36 | them are kept in a dynamically grown array that is obtained from | |
37 | malloc and grown as necessary via realloc. Each objfile typically | |
38 | has two of these, one for global symbols and one for static | |
39 | symbols. Although this adds a level of indirection for storing or | |
40 | accessing the partial symbols, it allows us to throw away duplicate | |
41 | psymbols and set all pointers to the single saved instance. */ | |
c906108c | 42 | |
c5aa993b | 43 | struct psymbol_allocation_list |
3a6c3343 | 44 | { |
c906108c | 45 | |
3a6c3343 AC |
46 | /* Pointer to beginning of dynamically allocated array of pointers |
47 | to partial symbols. The array is dynamically expanded as | |
48 | necessary to accommodate more pointers. */ | |
c906108c | 49 | |
3a6c3343 | 50 | struct partial_symbol **list; |
c906108c | 51 | |
3a6c3343 AC |
52 | /* Pointer to next available slot in which to store a pointer to a |
53 | partial symbol. */ | |
c906108c | 54 | |
3a6c3343 | 55 | struct partial_symbol **next; |
c906108c | 56 | |
3a6c3343 AC |
57 | /* Number of allocated pointer slots in current dynamic array (not |
58 | the number of bytes of storage). The "next" pointer will always | |
59 | point somewhere between list[0] and list[size], and when at | |
60 | list[size] the array will be expanded on the next attempt to | |
61 | store a pointer. */ | |
c906108c | 62 | |
3a6c3343 AC |
63 | int size; |
64 | }; | |
c906108c | 65 | |
62557bbc KB |
66 | /* Define an array of addresses to accommodate non-contiguous dynamic |
67 | loading of modules. This is for use when entering commands, so we | |
3a6c3343 AC |
68 | can keep track of the section names until we read the file and can |
69 | map them to bfd sections. This structure is also used by solib.c | |
70 | to communicate the section addresses in shared objects to | |
71 | symbol_file_add (). */ | |
72 | ||
73 | struct section_addr_info | |
62557bbc | 74 | { |
a39a16c4 MM |
75 | /* The number of sections for which address information is |
76 | available. */ | |
77 | size_t num_sections; | |
9d8a64cb | 78 | /* Sections whose names are file format dependent. */ |
62557bbc KB |
79 | struct other_sections |
80 | { | |
81 | CORE_ADDR addr; | |
82 | char *name; | |
672d9c23 JK |
83 | |
84 | /* SECTINDEX must be valid for associated BFD if ADDR is not zero. */ | |
62557bbc | 85 | int sectindex; |
a39a16c4 | 86 | } other[1]; |
62557bbc KB |
87 | }; |
88 | ||
28c32713 JB |
89 | |
90 | /* A table listing the load segments in a symfile, and which segment | |
91 | each BFD section belongs to. */ | |
31d99776 DJ |
92 | struct symfile_segment_data |
93 | { | |
94 | /* How many segments are present in this file. If there are | |
95 | two, the text segment is the first one and the data segment | |
96 | is the second one. */ | |
97 | int num_segments; | |
98 | ||
99 | /* If NUM_SEGMENTS is greater than zero, the original base address | |
100 | of each segment. */ | |
101 | CORE_ADDR *segment_bases; | |
102 | ||
103 | /* If NUM_SEGMENTS is greater than zero, the memory size of each | |
104 | segment. */ | |
105 | CORE_ADDR *segment_sizes; | |
106 | ||
107 | /* If NUM_SEGMENTS is greater than zero, this is an array of entries | |
28c32713 JB |
108 | recording which segment contains each BFD section. |
109 | SEGMENT_INFO[I] is S+1 if the I'th BFD section belongs to segment | |
110 | S, or zero if it is not in any segment. */ | |
31d99776 DJ |
111 | int *segment_info; |
112 | }; | |
113 | ||
ccefe4c4 TT |
114 | /* The "quick" symbol functions exist so that symbol readers can |
115 | avoiding an initial read of all the symbols. For example, symbol | |
116 | readers might choose to use the "partial symbol table" utilities, | |
117 | which is one implementation of the quick symbol functions. | |
118 | ||
119 | The quick symbol functions are generally opaque: the underlying | |
120 | representation is hidden from the caller. | |
121 | ||
122 | In general, these functions should only look at whatever special | |
123 | index the symbol reader creates -- looking through the symbol | |
124 | tables themselves is handled by generic code. If a function is | |
125 | defined as returning a "symbol table", this means that the function | |
126 | should only return a newly-created symbol table; it should not | |
127 | examine pre-existing ones. | |
128 | ||
129 | The exact list of functions here was determined in an ad hoc way | |
130 | based on gdb's history. */ | |
131 | ||
132 | struct quick_symbol_functions | |
133 | { | |
134 | /* Return true if this objfile has any "partial" symbols | |
135 | available. */ | |
136 | int (*has_symbols) (struct objfile *objfile); | |
137 | ||
138 | /* Return the symbol table for the "last" file appearing in | |
139 | OBJFILE. */ | |
140 | struct symtab *(*find_last_source_symtab) (struct objfile *objfile); | |
141 | ||
142 | /* Forget all cached full file names for OBJFILE. */ | |
143 | void (*forget_cached_source_info) (struct objfile *objfile); | |
144 | ||
145 | /* Look up the symbol table, in OBJFILE, of a source file named | |
146 | NAME. If there is no '/' in the name, a match after a '/' in the | |
147 | symbol table's file name will also work. FULL_PATH is the | |
148 | absolute file name, and REAL_PATH is the same, run through | |
149 | gdb_realpath. | |
150 | ||
151 | If no such symbol table can be found, returns 0. | |
152 | ||
153 | Otherwise, sets *RESULT to the symbol table and returns 1. This | |
154 | might return 1 and set *RESULT to NULL if the requested file is | |
155 | an include file that does not have a symtab of its own. */ | |
156 | int (*lookup_symtab) (struct objfile *objfile, | |
157 | const char *name, | |
158 | const char *full_path, | |
159 | const char *real_path, | |
160 | struct symtab **result); | |
161 | ||
162 | /* Check to see if the symbol is defined in a "partial" symbol table | |
163 | of OBJFILE. KIND should be either GLOBAL_BLOCK or STATIC_BLOCK, | |
164 | depending on whether we want to search global symbols or static | |
165 | symbols. NAME is the name of the symbol to look for. DOMAIN | |
166 | indicates what sort of symbol to search for. | |
167 | ||
168 | Returns the newly-expanded symbol table in which the symbol is | |
169 | defined, or NULL if no such symbol table exists. */ | |
170 | struct symtab *(*lookup_symbol) (struct objfile *objfile, | |
171 | int kind, const char *name, | |
172 | domain_enum domain); | |
173 | ||
faf68db7 TT |
174 | /* Expand each symbol table in OBJFILE that may have items matching |
175 | KIND, NAME, and DOMAIN -- these arguments are as for | |
176 | `lookup_symbol'. For each such symbol table, call MATCHER with | |
177 | the symbol table and DATA arguments. If MATCHER returns NULL, | |
178 | keep going. Otherwise, return the result of MATCHER. If MATCHER | |
179 | never returns non-NULL, return NULL. A backend can choose to | |
180 | implement this and then have its `lookup_symbol' hook always | |
181 | return NULL, or the reverse. (It doesn't make sense to implement | |
182 | both.) */ | |
183 | struct symbol *(*expand_one_symtab_matching) | |
184 | (struct objfile *objfile, | |
185 | int kind, const char *name, | |
186 | domain_enum domain, | |
187 | struct symbol *(*matcher) (struct symtab *symtab, | |
188 | int kind, | |
189 | const char *name, | |
190 | domain_enum domain, | |
191 | void *data), | |
192 | void *data); | |
58b6ab13 | 193 | |
ccefe4c4 TT |
194 | /* Print statistics about any indices loaded for OBJFILE. The |
195 | statistics should be printed to gdb_stdout. This is used for | |
196 | "maint print statistics". */ | |
197 | void (*print_stats) (struct objfile *objfile); | |
198 | ||
199 | /* Dump any indices loaded for OBJFILE. The dump should go to | |
200 | gdb_stdout. This is used for "maint print objfiles". */ | |
201 | void (*dump) (struct objfile *objfile); | |
202 | ||
203 | /* This is called by objfile_relocate to relocate any indices loaded | |
204 | for OBJFILE. */ | |
205 | void (*relocate) (struct objfile *objfile, | |
206 | struct section_offsets *new_offsets, | |
207 | struct section_offsets *delta); | |
208 | ||
209 | /* Find all the symbols in OBJFILE named FUNC_NAME, and ensure that | |
210 | the corresponding symbol tables are loaded. */ | |
211 | void (*expand_symtabs_for_function) (struct objfile *objfile, | |
212 | const char *func_name); | |
213 | ||
214 | /* Read all symbol tables associated with OBJFILE. */ | |
215 | void (*expand_all_symtabs) (struct objfile *objfile); | |
216 | ||
217 | /* Read all symbol tables associated with OBJFILE which have the | |
218 | file name FILENAME. */ | |
219 | void (*expand_symtabs_with_filename) (struct objfile *objfile, | |
220 | const char *filename); | |
221 | ||
222 | /* Return the file name of the file holding the symbol in OBJFILE | |
223 | named NAME. If no such symbol exists in OBJFILE, return NULL. */ | |
dd786858 | 224 | const char *(*find_symbol_file) (struct objfile *objfile, const char *name); |
ccefe4c4 TT |
225 | |
226 | /* This method is specific to Ada. It walks the partial symbol | |
227 | tables of OBJFILE looking for a name match. WILD_MATCH and | |
228 | IS_NAME_SUFFIX are predicate functions that the implementation | |
229 | may call to check for a match. | |
230 | ||
231 | This function is completely ad hoc and new implementations should | |
232 | refer to the psymtab implementation to see what to do. */ | |
233 | void (*map_ada_symtabs) (struct objfile *objfile, | |
234 | int (*wild_match) (const char *, int, const char *), | |
235 | int (*is_name_suffix) (const char *), | |
236 | void (*callback) (struct objfile *, | |
237 | struct symtab *, void *), | |
238 | const char *name, int global, | |
239 | domain_enum namespace, int wild, | |
240 | void *data); | |
241 | ||
242 | /* Expand all symbol tables in OBJFILE matching some criteria. | |
243 | ||
244 | FILE_MATCHER is called for each file in OBJFILE. The file name | |
245 | and the DATA argument are passed to it. If it returns zero, this | |
246 | file is skipped. | |
247 | ||
248 | Otherwise, if the file is not skipped, then NAME_MATCHER is | |
249 | called for each symbol defined in the file. The symbol's | |
250 | "natural" name and DATA are passed to NAME_MATCHER. | |
251 | ||
252 | If NAME_MATCHER returns zero, then this symbol is skipped. | |
253 | ||
254 | Otherwise, if this symbol is not skipped, and it matches KIND, | |
255 | then this symbol's symbol table is expanded. | |
256 | ||
257 | DATA is user data that is passed unmodified to the callback | |
258 | functions. */ | |
259 | void (*expand_symtabs_matching) (struct objfile *objfile, | |
260 | int (*file_matcher) (const char *, void *), | |
261 | int (*name_matcher) (const char *, void *), | |
262 | domain_enum kind, | |
263 | void *data); | |
264 | ||
265 | /* Return the symbol table from OBJFILE that contains PC and | |
266 | SECTION. Return NULL if there is no such symbol table. This | |
267 | should return the symbol table that contains a symbol whose | |
268 | address exactly matches PC, or, if there is no exact match, the | |
269 | symbol table that contains a symbol whose address is closest to | |
270 | PC. */ | |
271 | struct symtab *(*find_pc_sect_symtab) (struct objfile *objfile, | |
272 | struct minimal_symbol *msymbol, | |
273 | CORE_ADDR pc, | |
274 | struct obj_section *section, | |
275 | int warn_if_readin); | |
276 | ||
277 | /* Call a callback for every symbol defined in OBJFILE. FUN is the | |
278 | callback. It is passed the symbol's natural name, and the DATA | |
279 | passed to this function. */ | |
280 | void (*map_symbol_names) (struct objfile *objfile, | |
281 | void (*fun) (const char *, void *), | |
282 | void *data); | |
283 | ||
284 | /* Call a callback for every file defined in OBJFILE. FUN is the | |
285 | callback. It is passed the file's name, the file's full name, | |
286 | and the DATA passed to this function. */ | |
287 | void (*map_symbol_filenames) (struct objfile *objfile, | |
288 | void (*fun) (const char *, const char *, | |
289 | void *), | |
290 | void *data); | |
291 | }; | |
292 | ||
c906108c SS |
293 | /* Structure to keep track of symbol reading functions for various |
294 | object file types. */ | |
295 | ||
c5aa993b | 296 | struct sym_fns |
3a6c3343 | 297 | { |
c906108c | 298 | |
3a6c3343 AC |
299 | /* BFD flavour that we handle, or (as a special kludge, see |
300 | xcoffread.c, (enum bfd_flavour)-1 for xcoff). */ | |
c906108c | 301 | |
3a6c3343 | 302 | enum bfd_flavour sym_flavour; |
c906108c | 303 | |
3a6c3343 AC |
304 | /* Initializes anything that is global to the entire symbol table. |
305 | It is called during symbol_file_add, when we begin debugging an | |
306 | entirely new program. */ | |
c906108c | 307 | |
3a6c3343 | 308 | void (*sym_new_init) (struct objfile *); |
c906108c | 309 | |
3a6c3343 AC |
310 | /* Reads any initial information from a symbol file, and initializes |
311 | the struct sym_fns SF in preparation for sym_read(). It is | |
312 | called every time we read a symbol file for any reason. */ | |
c906108c | 313 | |
3a6c3343 | 314 | void (*sym_init) (struct objfile *); |
c906108c | 315 | |
f4352531 | 316 | /* sym_read (objfile, symfile_flags) Reads a symbol file into a psymtab |
3a6c3343 | 317 | (or possibly a symtab). OBJFILE is the objfile struct for the |
f4352531 TG |
318 | file we are reading. SYMFILE_FLAGS are the flags passed to |
319 | symbol_file_add & co. */ | |
c906108c | 320 | |
3a6c3343 | 321 | void (*sym_read) (struct objfile *, int); |
c906108c | 322 | |
3a6c3343 AC |
323 | /* Called when we are finished with an objfile. Should do all |
324 | cleanup that is specific to the object file format for the | |
325 | particular objfile. */ | |
c906108c | 326 | |
3a6c3343 | 327 | void (*sym_finish) (struct objfile *); |
c906108c | 328 | |
3a6c3343 AC |
329 | /* This function produces a file-dependent section_offsets |
330 | structure, allocated in the objfile's storage, and based on the | |
331 | parameter. The parameter is currently a CORE_ADDR (FIXME!) for | |
332 | backward compatibility with the higher levels of GDB. It should | |
333 | probably be changed to a string, where NULL means the default, | |
334 | and others are parsed in a file dependent way. */ | |
c906108c | 335 | |
3a6c3343 | 336 | void (*sym_offsets) (struct objfile *, struct section_addr_info *); |
c906108c | 337 | |
31d99776 DJ |
338 | /* This function produces a format-independent description of |
339 | the segments of ABFD. Each segment is a unit of the file | |
340 | which may be relocated independently. */ | |
341 | ||
342 | struct symfile_segment_data *(*sym_segments) (bfd *abfd); | |
343 | ||
c295b2e5 JB |
344 | /* This function should read the linetable from the objfile when |
345 | the line table cannot be read while processing the debugging | |
346 | information. */ | |
ac8035ab | 347 | |
c295b2e5 JB |
348 | void (*sym_read_linetable) (void); |
349 | ||
ac8035ab TG |
350 | /* Relocate the contents of a debug section SECTP. The |
351 | contents are stored in BUF if it is non-NULL, or returned in a | |
352 | malloc'd buffer otherwise. */ | |
353 | ||
354 | bfd_byte *(*sym_relocate) (struct objfile *, asection *sectp, bfd_byte *buf); | |
355 | ||
ccefe4c4 TT |
356 | /* The "quick" (aka partial) symbol functions for this symbol |
357 | reader. */ | |
358 | const struct quick_symbol_functions *qf; | |
359 | ||
3a6c3343 AC |
360 | /* Finds the next struct sym_fns. They are allocated and |
361 | initialized in whatever module implements the functions pointed | |
362 | to; an initializer calls add_symtab_fns to add them to the global | |
363 | chain. */ | |
c906108c | 364 | |
3a6c3343 | 365 | struct sym_fns *next; |
c5aa993b | 366 | |
3a6c3343 | 367 | }; |
c906108c | 368 | |
567995e1 JK |
369 | extern struct section_addr_info * |
370 | build_section_addr_info_from_objfile (const struct objfile *objfile); | |
371 | ||
75242ef4 JK |
372 | extern void relative_addr_info_to_section_offsets |
373 | (struct section_offsets *section_offsets, int num_sections, | |
374 | struct section_addr_info *addrs); | |
375 | ||
376 | extern void addr_info_make_relative (struct section_addr_info *addrs, | |
377 | bfd *abfd); | |
378 | ||
c906108c SS |
379 | /* The default version of sym_fns.sym_offsets for readers that don't |
380 | do anything special. */ | |
381 | ||
570b8f7c AC |
382 | extern void default_symfile_offsets (struct objfile *objfile, |
383 | struct section_addr_info *); | |
c906108c | 384 | |
31d99776 DJ |
385 | /* The default version of sym_fns.sym_segments for readers that don't |
386 | do anything special. */ | |
387 | ||
388 | extern struct symfile_segment_data *default_symfile_segments (bfd *abfd); | |
c906108c | 389 | |
ac8035ab TG |
390 | /* The default version of sym_fns.sym_relocate for readers that don't |
391 | do anything special. */ | |
392 | ||
393 | extern bfd_byte *default_symfile_relocate (struct objfile *objfile, | |
394 | asection *sectp, bfd_byte *buf); | |
395 | ||
570b8f7c AC |
396 | extern void extend_psymbol_list (struct psymbol_allocation_list *, |
397 | struct objfile *); | |
c906108c | 398 | |
3a6c3343 | 399 | /* Add any kind of symbol to a psymbol_allocation_list. */ |
c906108c SS |
400 | |
401 | /* #include "demangle.h" */ | |
402 | ||
5c4e30ca | 403 | extern const |
04a679b8 | 404 | struct partial_symbol *add_psymbol_to_list (char *, int, int, domain_enum, |
5c4e30ca DC |
405 | enum address_class, |
406 | struct psymbol_allocation_list *, | |
407 | long, CORE_ADDR, | |
408 | enum language, struct objfile *); | |
c906108c | 409 | |
a14ed312 | 410 | extern void init_psymbol_list (struct objfile *, int); |
c906108c | 411 | |
a14ed312 | 412 | extern struct symtab *allocate_symtab (char *, struct objfile *); |
c906108c | 413 | |
a14ed312 | 414 | extern void add_symtab_fns (struct sym_fns *); |
c906108c | 415 | |
7eedccfa PP |
416 | /* This enum encodes bit-flags passed as ADD_FLAGS parameter to |
417 | syms_from_objfile, symbol_file_add, etc. */ | |
418 | ||
419 | enum symfile_add_flags | |
420 | { | |
421 | /* Be chatty about what you are doing. */ | |
422 | SYMFILE_VERBOSE = 1 << 1, | |
423 | ||
424 | /* This is the main symbol file (as opposed to symbol file for dynamically | |
425 | loaded code). */ | |
426 | SYMFILE_MAINLINE = 1 << 2, | |
427 | ||
428 | /* Do not call breakpoint_re_set when adding this symbol file. */ | |
429 | SYMFILE_DEFER_BP_RESET = 1 << 3 | |
430 | }; | |
431 | ||
7e8580c1 | 432 | extern void syms_from_objfile (struct objfile *, |
3a6c3343 | 433 | struct section_addr_info *, |
7eedccfa | 434 | struct section_offsets *, int, int); |
c906108c | 435 | |
7eedccfa | 436 | extern void new_symfile_objfile (struct objfile *, int); |
c906108c | 437 | |
a14ed312 | 438 | extern struct objfile *symbol_file_add (char *, int, |
7eedccfa | 439 | struct section_addr_info *, int); |
62557bbc | 440 | |
eb4556d7 JB |
441 | extern struct objfile *symbol_file_add_from_bfd (bfd *, int, |
442 | struct section_addr_info *, | |
7eedccfa | 443 | int); |
eb4556d7 | 444 | |
15d123c9 | 445 | extern void symbol_file_add_separate (bfd *, int, struct objfile *); |
9cce227f | 446 | |
15d123c9 | 447 | extern char *find_separate_debug_file_by_debuglink (struct objfile *); |
9cce227f | 448 | |
a39a16c4 MM |
449 | /* Create a new section_addr_info, with room for NUM_SECTIONS. */ |
450 | ||
3a6c3343 AC |
451 | extern struct section_addr_info *alloc_section_addr_info (size_t |
452 | num_sections); | |
a39a16c4 | 453 | |
3a6c3343 AC |
454 | /* Build (allocate and populate) a section_addr_info struct from an |
455 | existing section table. */ | |
62557bbc | 456 | |
3a6c3343 | 457 | extern struct section_addr_info |
0542c86d | 458 | *build_section_addr_info_from_section_table (const struct target_section |
3a6c3343 | 459 | *start, |
0542c86d | 460 | const struct target_section |
3a6c3343 | 461 | *end); |
62557bbc | 462 | |
3a6c3343 AC |
463 | /* Free all memory allocated by |
464 | build_section_addr_info_from_section_table. */ | |
62557bbc | 465 | |
570b8f7c | 466 | extern void free_section_addr_info (struct section_addr_info *); |
62557bbc KB |
467 | |
468 | ||
a14ed312 KB |
469 | extern struct partial_symtab *start_psymtab_common (struct objfile *, |
470 | struct section_offsets *, | |
d85a05f0 | 471 | const char *, CORE_ADDR, |
a14ed312 KB |
472 | struct partial_symbol **, |
473 | struct partial_symbol **); | |
c906108c | 474 | |
3a6c3343 AC |
475 | /* Make a copy of the string at PTR with SIZE characters in the symbol |
476 | obstack (and add a null character at the end in the copy). Returns | |
477 | the address of the copy. */ | |
c906108c | 478 | |
63ca651f | 479 | extern char *obsavestring (const char *, int, struct obstack *); |
c906108c | 480 | |
48cb83fd JK |
481 | /* Concatenate NULL terminated variable argument list of `const char *' strings; |
482 | return the new string. Space is found in the OBSTACKP. Argument list must | |
483 | be terminated by a sentinel expression `(char *) NULL'. */ | |
c906108c | 484 | |
48cb83fd | 485 | extern char *obconcat (struct obstack *obstackp, ...) ATTRIBUTE_SENTINEL; |
c906108c SS |
486 | |
487 | /* Variables */ | |
488 | ||
b7209cb4 FF |
489 | /* If non-zero, shared library symbols will be added automatically |
490 | when the inferior is created, new libraries are loaded, or when | |
491 | attaching to the inferior. This is almost always what users will | |
492 | want to have happen; but for very large programs, the startup time | |
493 | will be excessive, and so if this is a problem, the user can clear | |
494 | this flag and then add the shared library symbols as needed. Note | |
495 | that there is a potential for confusion, since if the shared | |
496 | library symbols are not loaded, commands like "info fun" will *not* | |
3a6c3343 | 497 | report all the functions that are actually present. */ |
c906108c | 498 | |
b7209cb4 | 499 | extern int auto_solib_add; |
c906108c | 500 | |
b7209cb4 FF |
501 | /* For systems that support it, a threshold size in megabytes. If |
502 | automatically adding a new library's symbol table to those already | |
503 | known to the debugger would cause the total shared library symbol | |
504 | size to exceed this threshhold, then the shlib's symbols are not | |
505 | added. The threshold is ignored if the user explicitly asks for a | |
3a6c3343 | 506 | shlib to be added, such as when using the "sharedlibrary" command. */ |
c906108c | 507 | |
b7209cb4 | 508 | extern int auto_solib_limit; |
c906108c SS |
509 | |
510 | /* From symfile.c */ | |
511 | ||
8b60591b JB |
512 | extern void set_initial_language (void); |
513 | ||
d85a05f0 DJ |
514 | extern struct partial_symtab *allocate_psymtab (const char *, |
515 | struct objfile *); | |
c906108c | 516 | |
a14ed312 | 517 | extern void discard_psymtab (struct partial_symtab *); |
c906108c | 518 | |
4efb68b1 | 519 | extern void find_lowest_section (bfd *, asection *, void *); |
c906108c | 520 | |
a14ed312 | 521 | extern bfd *symfile_bfd_open (char *); |
c906108c | 522 | |
874f5765 TG |
523 | extern bfd *bfd_open_maybe_remote (const char *); |
524 | ||
e2f6d8e5 JB |
525 | extern int get_section_index (struct objfile *, char *); |
526 | ||
c906108c | 527 | /* Utility functions for overlay sections: */ |
3a6c3343 AC |
528 | extern enum overlay_debugging_state |
529 | { | |
530 | ovly_off, | |
531 | ovly_on, | |
d874f1e2 MS |
532 | ovly_auto |
533 | } overlay_debugging; | |
c906108c SS |
534 | extern int overlay_cache_invalid; |
535 | ||
3a6c3343 | 536 | /* Return the "mapped" overlay section containing the PC. */ |
714835d5 | 537 | extern struct obj_section *find_pc_mapped_section (CORE_ADDR); |
c906108c | 538 | |
3a6c3343 AC |
539 | /* Return any overlay section containing the PC (even in its LMA |
540 | region). */ | |
714835d5 | 541 | extern struct obj_section *find_pc_overlay (CORE_ADDR); |
c906108c | 542 | |
3a6c3343 | 543 | /* Return true if the section is an overlay. */ |
714835d5 | 544 | extern int section_is_overlay (struct obj_section *); |
c906108c | 545 | |
3a6c3343 | 546 | /* Return true if the overlay section is currently "mapped". */ |
714835d5 | 547 | extern int section_is_mapped (struct obj_section *); |
c906108c | 548 | |
3a6c3343 | 549 | /* Return true if pc belongs to section's VMA. */ |
714835d5 | 550 | extern CORE_ADDR pc_in_mapped_range (CORE_ADDR, struct obj_section *); |
c906108c | 551 | |
3a6c3343 | 552 | /* Return true if pc belongs to section's LMA. */ |
714835d5 | 553 | extern CORE_ADDR pc_in_unmapped_range (CORE_ADDR, struct obj_section *); |
c906108c | 554 | |
3a6c3343 | 555 | /* Map an address from a section's LMA to its VMA. */ |
714835d5 | 556 | extern CORE_ADDR overlay_mapped_address (CORE_ADDR, struct obj_section *); |
c906108c | 557 | |
3a6c3343 | 558 | /* Map an address from a section's VMA to its LMA. */ |
714835d5 | 559 | extern CORE_ADDR overlay_unmapped_address (CORE_ADDR, struct obj_section *); |
c906108c | 560 | |
3a6c3343 | 561 | /* Convert an address in an overlay section (force into VMA range). */ |
714835d5 | 562 | extern CORE_ADDR symbol_overlayed_address (CORE_ADDR, struct obj_section *); |
c906108c | 563 | |
3a6c3343 | 564 | /* Load symbols from a file. */ |
1adeb98a FN |
565 | extern void symbol_file_add_main (char *args, int from_tty); |
566 | ||
3a6c3343 | 567 | /* Clear GDB symbol tables. */ |
1adeb98a FN |
568 | extern void symbol_file_clear (int from_tty); |
569 | ||
1c772458 UW |
570 | /* Default overlay update function. */ |
571 | extern void simple_overlay_update (struct obj_section *); | |
572 | ||
ac8035ab TG |
573 | extern bfd_byte *symfile_relocate_debug_section (struct objfile *, asection *, |
574 | bfd_byte *); | |
086df311 | 575 | |
31d99776 DJ |
576 | extern int symfile_map_offsets_to_segments (bfd *, |
577 | struct symfile_segment_data *, | |
578 | struct section_offsets *, | |
579 | int, const CORE_ADDR *); | |
580 | struct symfile_segment_data *get_symfile_segment_data (bfd *abfd); | |
581 | void free_symfile_segment_data (struct symfile_segment_data *data); | |
582 | ||
ccefe4c4 TT |
583 | extern struct cleanup *increment_reading_symtab (void); |
584 | ||
c906108c SS |
585 | /* From dwarf2read.c */ |
586 | ||
c5edf76a | 587 | extern int dwarf2_has_info (struct objfile *); |
c906108c | 588 | |
9291a0cd | 589 | extern int dwarf2_initialize_objfile (struct objfile *); |
f29dff0a | 590 | extern void dwarf2_build_psymtabs (struct objfile *); |
b6af0555 | 591 | extern void dwarf2_build_frame_info (struct objfile *); |
d4f3574e | 592 | |
fe3e1990 DJ |
593 | void dwarf2_free_objfile (struct objfile *); |
594 | ||
c906108c SS |
595 | /* From mdebugread.c */ |
596 | ||
597 | /* Hack to force structures to exist before use in parameter list. */ | |
598 | struct ecoff_debug_hack | |
3a6c3343 AC |
599 | { |
600 | struct ecoff_debug_swap *a; | |
601 | struct ecoff_debug_info *b; | |
602 | }; | |
603 | ||
604 | extern void mdebug_build_psymtabs (struct objfile *, | |
605 | const struct ecoff_debug_swap *, | |
606 | struct ecoff_debug_info *); | |
607 | ||
608 | extern void elfmdebug_build_psymtabs (struct objfile *, | |
609 | const struct ecoff_debug_swap *, | |
610 | asection *); | |
c906108c | 611 | |
c5aa993b | 612 | #endif /* !defined(SYMFILE_H) */ |