| 1 | /* Definitions for reading symbol files into GDB. |
| 2 | |
| 3 | Copyright (C) 1990-2016 Free Software Foundation, Inc. |
| 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 |
| 9 | the Free Software Foundation; either version 3 of the License, or |
| 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 |
| 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 19 | |
| 20 | #if !defined (SYMFILE_H) |
| 21 | #define SYMFILE_H |
| 22 | |
| 23 | /* This file requires that you first include "bfd.h". */ |
| 24 | #include "symtab.h" |
| 25 | #include "probe.h" |
| 26 | |
| 27 | /* Opaque declarations. */ |
| 28 | struct target_section; |
| 29 | struct objfile; |
| 30 | struct obj_section; |
| 31 | struct obstack; |
| 32 | struct block; |
| 33 | struct probe; |
| 34 | struct value; |
| 35 | struct frame_info; |
| 36 | struct agent_expr; |
| 37 | struct axs_value; |
| 38 | |
| 39 | /* Comparison function for symbol look ups. */ |
| 40 | |
| 41 | typedef int (symbol_compare_ftype) (const char *string1, |
| 42 | const char *string2); |
| 43 | |
| 44 | /* Partial symbols are stored in the psymbol_cache and pointers to |
| 45 | them are kept in a dynamically grown array that is obtained from |
| 46 | malloc and grown as necessary via realloc. Each objfile typically |
| 47 | has two of these, one for global symbols and one for static |
| 48 | symbols. Although this adds a level of indirection for storing or |
| 49 | accessing the partial symbols, it allows us to throw away duplicate |
| 50 | psymbols and set all pointers to the single saved instance. */ |
| 51 | |
| 52 | struct psymbol_allocation_list |
| 53 | { |
| 54 | |
| 55 | /* Pointer to beginning of dynamically allocated array of pointers |
| 56 | to partial symbols. The array is dynamically expanded as |
| 57 | necessary to accommodate more pointers. */ |
| 58 | |
| 59 | struct partial_symbol **list; |
| 60 | |
| 61 | /* Pointer to next available slot in which to store a pointer to a |
| 62 | partial symbol. */ |
| 63 | |
| 64 | struct partial_symbol **next; |
| 65 | |
| 66 | /* Number of allocated pointer slots in current dynamic array (not |
| 67 | the number of bytes of storage). The "next" pointer will always |
| 68 | point somewhere between list[0] and list[size], and when at |
| 69 | list[size] the array will be expanded on the next attempt to |
| 70 | store a pointer. */ |
| 71 | |
| 72 | int size; |
| 73 | }; |
| 74 | |
| 75 | struct other_sections |
| 76 | { |
| 77 | CORE_ADDR addr; |
| 78 | char *name; |
| 79 | |
| 80 | /* SECTINDEX must be valid for associated BFD or set to -1. */ |
| 81 | int sectindex; |
| 82 | }; |
| 83 | |
| 84 | /* Define an array of addresses to accommodate non-contiguous dynamic |
| 85 | loading of modules. This is for use when entering commands, so we |
| 86 | can keep track of the section names until we read the file and can |
| 87 | map them to bfd sections. This structure is also used by solib.c |
| 88 | to communicate the section addresses in shared objects to |
| 89 | symbol_file_add (). */ |
| 90 | |
| 91 | struct section_addr_info |
| 92 | { |
| 93 | /* The number of sections for which address information is |
| 94 | available. */ |
| 95 | size_t num_sections; |
| 96 | /* Sections whose names are file format dependent. */ |
| 97 | struct other_sections other[1]; |
| 98 | }; |
| 99 | |
| 100 | |
| 101 | /* A table listing the load segments in a symfile, and which segment |
| 102 | each BFD section belongs to. */ |
| 103 | struct symfile_segment_data |
| 104 | { |
| 105 | /* How many segments are present in this file. If there are |
| 106 | two, the text segment is the first one and the data segment |
| 107 | is the second one. */ |
| 108 | int num_segments; |
| 109 | |
| 110 | /* If NUM_SEGMENTS is greater than zero, the original base address |
| 111 | of each segment. */ |
| 112 | CORE_ADDR *segment_bases; |
| 113 | |
| 114 | /* If NUM_SEGMENTS is greater than zero, the memory size of each |
| 115 | segment. */ |
| 116 | CORE_ADDR *segment_sizes; |
| 117 | |
| 118 | /* If NUM_SEGMENTS is greater than zero, this is an array of entries |
| 119 | recording which segment contains each BFD section. |
| 120 | SEGMENT_INFO[I] is S+1 if the I'th BFD section belongs to segment |
| 121 | S, or zero if it is not in any segment. */ |
| 122 | int *segment_info; |
| 123 | }; |
| 124 | |
| 125 | /* Callback for quick_symbol_functions->map_symbol_filenames. */ |
| 126 | |
| 127 | typedef void (symbol_filename_ftype) (const char *filename, |
| 128 | const char *fullname, void *data); |
| 129 | |
| 130 | /* Callback for quick_symbol_functions->expand_symtabs_matching |
| 131 | to match a file name. */ |
| 132 | |
| 133 | typedef int (expand_symtabs_file_matcher_ftype) (const char *filename, |
| 134 | void *data, int basenames); |
| 135 | |
| 136 | /* Callback for quick_symbol_functions->expand_symtabs_matching |
| 137 | to match a symbol name. */ |
| 138 | |
| 139 | typedef int (expand_symtabs_symbol_matcher_ftype) (const char *name, |
| 140 | void *data); |
| 141 | |
| 142 | /* Callback for quick_symbol_functions->expand_symtabs_matching |
| 143 | to be called after a symtab has been expanded. */ |
| 144 | |
| 145 | typedef void (expand_symtabs_exp_notify_ftype) \ |
| 146 | (struct compunit_symtab *symtab, void *data); |
| 147 | |
| 148 | /* The "quick" symbol functions exist so that symbol readers can |
| 149 | avoiding an initial read of all the symbols. For example, symbol |
| 150 | readers might choose to use the "partial symbol table" utilities, |
| 151 | which is one implementation of the quick symbol functions. |
| 152 | |
| 153 | The quick symbol functions are generally opaque: the underlying |
| 154 | representation is hidden from the caller. |
| 155 | |
| 156 | In general, these functions should only look at whatever special |
| 157 | index the symbol reader creates -- looking through the symbol |
| 158 | tables themselves is handled by generic code. If a function is |
| 159 | defined as returning a "symbol table", this means that the function |
| 160 | should only return a newly-created symbol table; it should not |
| 161 | examine pre-existing ones. |
| 162 | |
| 163 | The exact list of functions here was determined in an ad hoc way |
| 164 | based on gdb's history. */ |
| 165 | |
| 166 | struct quick_symbol_functions |
| 167 | { |
| 168 | /* Return true if this objfile has any "partial" symbols |
| 169 | available. */ |
| 170 | int (*has_symbols) (struct objfile *objfile); |
| 171 | |
| 172 | /* Return the symbol table for the "last" file appearing in |
| 173 | OBJFILE. */ |
| 174 | struct symtab *(*find_last_source_symtab) (struct objfile *objfile); |
| 175 | |
| 176 | /* Forget all cached full file names for OBJFILE. */ |
| 177 | void (*forget_cached_source_info) (struct objfile *objfile); |
| 178 | |
| 179 | /* Expand and iterate over each "partial" symbol table in OBJFILE |
| 180 | where the source file is named NAME. |
| 181 | |
| 182 | If NAME is not absolute, a match after a '/' in the symbol table's |
| 183 | file name will also work, REAL_PATH is NULL then. If NAME is |
| 184 | absolute then REAL_PATH is non-NULL absolute file name as resolved |
| 185 | via gdb_realpath from NAME. |
| 186 | |
| 187 | If a match is found, the "partial" symbol table is expanded. |
| 188 | Then, this calls iterate_over_some_symtabs (or equivalent) over |
| 189 | all newly-created symbol tables, passing CALLBACK and DATA to it. |
| 190 | The result of this call is returned. */ |
| 191 | int (*map_symtabs_matching_filename) (struct objfile *objfile, |
| 192 | const char *name, |
| 193 | const char *real_path, |
| 194 | int (*callback) (struct symtab *, |
| 195 | void *), |
| 196 | void *data); |
| 197 | |
| 198 | /* Check to see if the symbol is defined in a "partial" symbol table |
| 199 | of OBJFILE. BLOCK_INDEX should be either GLOBAL_BLOCK or STATIC_BLOCK, |
| 200 | depending on whether we want to search global symbols or static |
| 201 | symbols. NAME is the name of the symbol to look for. DOMAIN |
| 202 | indicates what sort of symbol to search for. |
| 203 | |
| 204 | Returns the newly-expanded compunit in which the symbol is |
| 205 | defined, or NULL if no such symbol table exists. If OBJFILE |
| 206 | contains !TYPE_OPAQUE symbol prefer its compunit. If it contains |
| 207 | only TYPE_OPAQUE symbol(s), return at least that compunit. */ |
| 208 | struct compunit_symtab *(*lookup_symbol) (struct objfile *objfile, |
| 209 | int block_index, const char *name, |
| 210 | domain_enum domain); |
| 211 | |
| 212 | /* Print statistics about any indices loaded for OBJFILE. The |
| 213 | statistics should be printed to gdb_stdout. This is used for |
| 214 | "maint print statistics". */ |
| 215 | void (*print_stats) (struct objfile *objfile); |
| 216 | |
| 217 | /* Dump any indices loaded for OBJFILE. The dump should go to |
| 218 | gdb_stdout. This is used for "maint print objfiles". */ |
| 219 | void (*dump) (struct objfile *objfile); |
| 220 | |
| 221 | /* This is called by objfile_relocate to relocate any indices loaded |
| 222 | for OBJFILE. */ |
| 223 | void (*relocate) (struct objfile *objfile, |
| 224 | const struct section_offsets *new_offsets, |
| 225 | const struct section_offsets *delta); |
| 226 | |
| 227 | /* Find all the symbols in OBJFILE named FUNC_NAME, and ensure that |
| 228 | the corresponding symbol tables are loaded. */ |
| 229 | void (*expand_symtabs_for_function) (struct objfile *objfile, |
| 230 | const char *func_name); |
| 231 | |
| 232 | /* Read all symbol tables associated with OBJFILE. */ |
| 233 | void (*expand_all_symtabs) (struct objfile *objfile); |
| 234 | |
| 235 | /* Read all symbol tables associated with OBJFILE which have |
| 236 | symtab_to_fullname equal to FULLNAME. |
| 237 | This is for the purposes of examining code only, e.g., expand_line_sal. |
| 238 | The routine may ignore debug info that is known to not be useful with |
| 239 | code, e.g., DW_TAG_type_unit for dwarf debug info. */ |
| 240 | void (*expand_symtabs_with_fullname) (struct objfile *objfile, |
| 241 | const char *fullname); |
| 242 | |
| 243 | /* Find global or static symbols in all tables that are in DOMAIN |
| 244 | and for which MATCH (symbol name, NAME) == 0, passing each to |
| 245 | CALLBACK, reading in partial symbol tables as needed. Look |
| 246 | through global symbols if GLOBAL and otherwise static symbols. |
| 247 | Passes NAME, NAMESPACE, and DATA to CALLBACK with each symbol |
| 248 | found. After each block is processed, passes NULL to CALLBACK. |
| 249 | MATCH must be weaker than strcmp_iw_ordered in the sense that |
| 250 | strcmp_iw_ordered(x,y) == 0 --> MATCH(x,y) == 0. ORDERED_COMPARE, |
| 251 | if non-null, must be an ordering relation compatible with |
| 252 | strcmp_iw_ordered in the sense that |
| 253 | strcmp_iw_ordered(x,y) == 0 --> ORDERED_COMPARE(x,y) == 0 |
| 254 | and |
| 255 | strcmp_iw_ordered(x,y) <= 0 --> ORDERED_COMPARE(x,y) <= 0 |
| 256 | (allowing strcmp_iw_ordered(x,y) < 0 while ORDERED_COMPARE(x, y) == 0). |
| 257 | CALLBACK returns 0 to indicate that the scan should continue, or |
| 258 | non-zero to indicate that the scan should be terminated. */ |
| 259 | |
| 260 | void (*map_matching_symbols) (struct objfile *, |
| 261 | const char *name, domain_enum domain, |
| 262 | int global, |
| 263 | int (*callback) (struct block *, |
| 264 | struct symbol *, void *), |
| 265 | void *data, |
| 266 | symbol_compare_ftype *match, |
| 267 | symbol_compare_ftype *ordered_compare); |
| 268 | |
| 269 | /* Expand all symbol tables in OBJFILE matching some criteria. |
| 270 | |
| 271 | FILE_MATCHER is called for each file in OBJFILE. The file name |
| 272 | and the DATA argument are passed to it. If it returns zero, this |
| 273 | file is skipped. If FILE_MATCHER is NULL such file is not skipped. |
| 274 | If BASENAMES is non-zero the function should consider only base name of |
| 275 | DATA (passed file name is already only the lbasename part). |
| 276 | |
| 277 | Otherwise, if KIND does not match this symbol is skipped. |
| 278 | |
| 279 | If even KIND matches, then SYMBOL_MATCHER is called for each symbol |
| 280 | defined in the file. The symbol "search" name and DATA are passed |
| 281 | to SYMBOL_MATCHER. |
| 282 | |
| 283 | If SYMBOL_MATCHER returns zero, then this symbol is skipped. |
| 284 | |
| 285 | Otherwise, this symbol's symbol table is expanded. |
| 286 | |
| 287 | DATA is user data that is passed unmodified to the callback |
| 288 | functions. */ |
| 289 | void (*expand_symtabs_matching) |
| 290 | (struct objfile *objfile, |
| 291 | expand_symtabs_file_matcher_ftype *file_matcher, |
| 292 | expand_symtabs_symbol_matcher_ftype *symbol_matcher, |
| 293 | expand_symtabs_exp_notify_ftype *expansion_notify, |
| 294 | enum search_domain kind, |
| 295 | void *data); |
| 296 | |
| 297 | /* Return the comp unit from OBJFILE that contains PC and |
| 298 | SECTION. Return NULL if there is no such compunit. This |
| 299 | should return the compunit that contains a symbol whose |
| 300 | address exactly matches PC, or, if there is no exact match, the |
| 301 | compunit that contains a symbol whose address is closest to |
| 302 | PC. */ |
| 303 | struct compunit_symtab *(*find_pc_sect_compunit_symtab) |
| 304 | (struct objfile *objfile, struct bound_minimal_symbol msymbol, |
| 305 | CORE_ADDR pc, struct obj_section *section, int warn_if_readin); |
| 306 | |
| 307 | /* Call a callback for every file defined in OBJFILE whose symtab is |
| 308 | not already read in. FUN is the callback. It is passed the file's |
| 309 | FILENAME, the file's FULLNAME (if need_fullname is non-zero), and |
| 310 | the DATA passed to this function. */ |
| 311 | void (*map_symbol_filenames) (struct objfile *objfile, |
| 312 | symbol_filename_ftype *fun, void *data, |
| 313 | int need_fullname); |
| 314 | }; |
| 315 | |
| 316 | /* Structure of functions used for probe support. If one of these functions |
| 317 | is provided, all must be. */ |
| 318 | |
| 319 | struct sym_probe_fns |
| 320 | { |
| 321 | /* If non-NULL, return an array of probe objects. |
| 322 | |
| 323 | The returned value does not have to be freed and it has lifetime of the |
| 324 | OBJFILE. */ |
| 325 | VEC (probe_p) *(*sym_get_probes) (struct objfile *); |
| 326 | }; |
| 327 | |
| 328 | /* Structure to keep track of symbol reading functions for various |
| 329 | object file types. */ |
| 330 | |
| 331 | struct sym_fns |
| 332 | { |
| 333 | /* Initializes anything that is global to the entire symbol table. |
| 334 | It is called during symbol_file_add, when we begin debugging an |
| 335 | entirely new program. */ |
| 336 | |
| 337 | void (*sym_new_init) (struct objfile *); |
| 338 | |
| 339 | /* Reads any initial information from a symbol file, and initializes |
| 340 | the struct sym_fns SF in preparation for sym_read(). It is |
| 341 | called every time we read a symbol file for any reason. */ |
| 342 | |
| 343 | void (*sym_init) (struct objfile *); |
| 344 | |
| 345 | /* sym_read (objfile, symfile_flags) Reads a symbol file into a psymtab |
| 346 | (or possibly a symtab). OBJFILE is the objfile struct for the |
| 347 | file we are reading. SYMFILE_FLAGS are the flags passed to |
| 348 | symbol_file_add & co. */ |
| 349 | |
| 350 | void (*sym_read) (struct objfile *, int); |
| 351 | |
| 352 | /* Read the partial symbols for an objfile. This may be NULL, in which case |
| 353 | gdb has to check other ways if this objfile has any symbols. This may |
| 354 | only be non-NULL if the objfile actually does have debuginfo available. |
| 355 | */ |
| 356 | |
| 357 | void (*sym_read_psymbols) (struct objfile *); |
| 358 | |
| 359 | /* Called when we are finished with an objfile. Should do all |
| 360 | cleanup that is specific to the object file format for the |
| 361 | particular objfile. */ |
| 362 | |
| 363 | void (*sym_finish) (struct objfile *); |
| 364 | |
| 365 | |
| 366 | /* This function produces a file-dependent section_offsets |
| 367 | structure, allocated in the objfile's storage. |
| 368 | |
| 369 | The section_addr_info structure contains the offset of loadable and |
| 370 | allocated sections, relative to the absolute offsets found in the BFD. */ |
| 371 | |
| 372 | void (*sym_offsets) (struct objfile *, const struct section_addr_info *); |
| 373 | |
| 374 | /* This function produces a format-independent description of |
| 375 | the segments of ABFD. Each segment is a unit of the file |
| 376 | which may be relocated independently. */ |
| 377 | |
| 378 | struct symfile_segment_data *(*sym_segments) (bfd *abfd); |
| 379 | |
| 380 | /* This function should read the linetable from the objfile when |
| 381 | the line table cannot be read while processing the debugging |
| 382 | information. */ |
| 383 | |
| 384 | void (*sym_read_linetable) (struct objfile *); |
| 385 | |
| 386 | /* Relocate the contents of a debug section SECTP. The |
| 387 | contents are stored in BUF if it is non-NULL, or returned in a |
| 388 | malloc'd buffer otherwise. */ |
| 389 | |
| 390 | bfd_byte *(*sym_relocate) (struct objfile *, asection *sectp, bfd_byte *buf); |
| 391 | |
| 392 | /* If non-NULL, this objfile has probe support, and all the probe |
| 393 | functions referred to here will be non-NULL. */ |
| 394 | const struct sym_probe_fns *sym_probe_fns; |
| 395 | |
| 396 | /* The "quick" (aka partial) symbol functions for this symbol |
| 397 | reader. */ |
| 398 | const struct quick_symbol_functions *qf; |
| 399 | }; |
| 400 | |
| 401 | extern struct section_addr_info * |
| 402 | build_section_addr_info_from_objfile (const struct objfile *objfile); |
| 403 | |
| 404 | extern void relative_addr_info_to_section_offsets |
| 405 | (struct section_offsets *section_offsets, int num_sections, |
| 406 | const struct section_addr_info *addrs); |
| 407 | |
| 408 | extern void addr_info_make_relative (struct section_addr_info *addrs, |
| 409 | bfd *abfd); |
| 410 | |
| 411 | /* The default version of sym_fns.sym_offsets for readers that don't |
| 412 | do anything special. */ |
| 413 | |
| 414 | extern void default_symfile_offsets (struct objfile *objfile, |
| 415 | const struct section_addr_info *); |
| 416 | |
| 417 | /* The default version of sym_fns.sym_segments for readers that don't |
| 418 | do anything special. */ |
| 419 | |
| 420 | extern struct symfile_segment_data *default_symfile_segments (bfd *abfd); |
| 421 | |
| 422 | /* The default version of sym_fns.sym_relocate for readers that don't |
| 423 | do anything special. */ |
| 424 | |
| 425 | extern bfd_byte *default_symfile_relocate (struct objfile *objfile, |
| 426 | asection *sectp, bfd_byte *buf); |
| 427 | |
| 428 | extern struct symtab *allocate_symtab (struct compunit_symtab *, const char *) |
| 429 | ATTRIBUTE_NONNULL (1); |
| 430 | |
| 431 | extern struct compunit_symtab *allocate_compunit_symtab (struct objfile *, |
| 432 | const char *) |
| 433 | ATTRIBUTE_NONNULL (1); |
| 434 | |
| 435 | extern void add_compunit_symtab_to_objfile (struct compunit_symtab *cu); |
| 436 | |
| 437 | extern void add_symtab_fns (enum bfd_flavour flavour, const struct sym_fns *); |
| 438 | |
| 439 | extern void clear_symtab_users (int add_flags); |
| 440 | |
| 441 | extern enum language deduce_language_from_filename (const char *); |
| 442 | |
| 443 | /* This enum encodes bit-flags passed as ADD_FLAGS parameter to |
| 444 | symbol_file_add, etc. */ |
| 445 | |
| 446 | enum symfile_add_flags |
| 447 | { |
| 448 | /* Be chatty about what you are doing. */ |
| 449 | SYMFILE_VERBOSE = 1 << 1, |
| 450 | |
| 451 | /* This is the main symbol file (as opposed to symbol file for dynamically |
| 452 | loaded code). */ |
| 453 | SYMFILE_MAINLINE = 1 << 2, |
| 454 | |
| 455 | /* Do not call breakpoint_re_set when adding this symbol file. */ |
| 456 | SYMFILE_DEFER_BP_RESET = 1 << 3, |
| 457 | |
| 458 | /* Do not immediately read symbols for this file. By default, |
| 459 | symbols are read when the objfile is created. */ |
| 460 | SYMFILE_NO_READ = 1 << 4 |
| 461 | }; |
| 462 | |
| 463 | extern struct objfile *symbol_file_add (const char *, int, |
| 464 | struct section_addr_info *, int); |
| 465 | |
| 466 | extern struct objfile *symbol_file_add_from_bfd (bfd *, const char *, int, |
| 467 | struct section_addr_info *, |
| 468 | int, struct objfile *parent); |
| 469 | |
| 470 | extern void symbol_file_add_separate (bfd *, const char *, int, |
| 471 | struct objfile *); |
| 472 | |
| 473 | extern char *find_separate_debug_file_by_debuglink (struct objfile *); |
| 474 | |
| 475 | /* Create a new section_addr_info, with room for NUM_SECTIONS. */ |
| 476 | |
| 477 | extern struct section_addr_info *alloc_section_addr_info (size_t |
| 478 | num_sections); |
| 479 | |
| 480 | /* Build (allocate and populate) a section_addr_info struct from an |
| 481 | existing section table. */ |
| 482 | |
| 483 | extern struct section_addr_info |
| 484 | *build_section_addr_info_from_section_table (const struct target_section |
| 485 | *start, |
| 486 | const struct target_section |
| 487 | *end); |
| 488 | |
| 489 | /* Free all memory allocated by |
| 490 | build_section_addr_info_from_section_table. */ |
| 491 | |
| 492 | extern void free_section_addr_info (struct section_addr_info *); |
| 493 | |
| 494 | |
| 495 | /* Variables */ |
| 496 | |
| 497 | /* If non-zero, shared library symbols will be added automatically |
| 498 | when the inferior is created, new libraries are loaded, or when |
| 499 | attaching to the inferior. This is almost always what users will |
| 500 | want to have happen; but for very large programs, the startup time |
| 501 | will be excessive, and so if this is a problem, the user can clear |
| 502 | this flag and then add the shared library symbols as needed. Note |
| 503 | that there is a potential for confusion, since if the shared |
| 504 | library symbols are not loaded, commands like "info fun" will *not* |
| 505 | report all the functions that are actually present. */ |
| 506 | |
| 507 | extern int auto_solib_add; |
| 508 | |
| 509 | /* From symfile.c */ |
| 510 | |
| 511 | extern void set_initial_language (void); |
| 512 | |
| 513 | extern void find_lowest_section (bfd *, asection *, void *); |
| 514 | |
| 515 | extern bfd *symfile_bfd_open (const char *); |
| 516 | |
| 517 | extern int get_section_index (struct objfile *, char *); |
| 518 | |
| 519 | extern int print_symbol_loading_p (int from_tty, int mainline, int full); |
| 520 | |
| 521 | /* Utility functions for overlay sections: */ |
| 522 | extern enum overlay_debugging_state |
| 523 | { |
| 524 | ovly_off, |
| 525 | ovly_on, |
| 526 | ovly_auto |
| 527 | } overlay_debugging; |
| 528 | extern int overlay_cache_invalid; |
| 529 | |
| 530 | /* Return the "mapped" overlay section containing the PC. */ |
| 531 | extern struct obj_section *find_pc_mapped_section (CORE_ADDR); |
| 532 | |
| 533 | /* Return any overlay section containing the PC (even in its LMA |
| 534 | region). */ |
| 535 | extern struct obj_section *find_pc_overlay (CORE_ADDR); |
| 536 | |
| 537 | /* Return true if the section is an overlay. */ |
| 538 | extern int section_is_overlay (struct obj_section *); |
| 539 | |
| 540 | /* Return true if the overlay section is currently "mapped". */ |
| 541 | extern int section_is_mapped (struct obj_section *); |
| 542 | |
| 543 | /* Return true if pc belongs to section's VMA. */ |
| 544 | extern CORE_ADDR pc_in_mapped_range (CORE_ADDR, struct obj_section *); |
| 545 | |
| 546 | /* Return true if pc belongs to section's LMA. */ |
| 547 | extern CORE_ADDR pc_in_unmapped_range (CORE_ADDR, struct obj_section *); |
| 548 | |
| 549 | /* Map an address from a section's LMA to its VMA. */ |
| 550 | extern CORE_ADDR overlay_mapped_address (CORE_ADDR, struct obj_section *); |
| 551 | |
| 552 | /* Map an address from a section's VMA to its LMA. */ |
| 553 | extern CORE_ADDR overlay_unmapped_address (CORE_ADDR, struct obj_section *); |
| 554 | |
| 555 | /* Convert an address in an overlay section (force into VMA range). */ |
| 556 | extern CORE_ADDR symbol_overlayed_address (CORE_ADDR, struct obj_section *); |
| 557 | |
| 558 | /* Load symbols from a file. */ |
| 559 | extern void symbol_file_add_main (const char *args, int from_tty); |
| 560 | |
| 561 | /* Clear GDB symbol tables. */ |
| 562 | extern void symbol_file_clear (int from_tty); |
| 563 | |
| 564 | /* Default overlay update function. */ |
| 565 | extern void simple_overlay_update (struct obj_section *); |
| 566 | |
| 567 | extern bfd_byte *symfile_relocate_debug_section (struct objfile *, asection *, |
| 568 | bfd_byte *); |
| 569 | |
| 570 | extern int symfile_map_offsets_to_segments (bfd *, |
| 571 | const struct symfile_segment_data *, |
| 572 | struct section_offsets *, |
| 573 | int, const CORE_ADDR *); |
| 574 | struct symfile_segment_data *get_symfile_segment_data (bfd *abfd); |
| 575 | void free_symfile_segment_data (struct symfile_segment_data *data); |
| 576 | |
| 577 | extern struct cleanup *increment_reading_symtab (void); |
| 578 | |
| 579 | void expand_symtabs_matching (expand_symtabs_file_matcher_ftype *, |
| 580 | expand_symtabs_symbol_matcher_ftype *, |
| 581 | expand_symtabs_exp_notify_ftype *, |
| 582 | enum search_domain kind, void *data); |
| 583 | |
| 584 | void map_symbol_filenames (symbol_filename_ftype *fun, void *data, |
| 585 | int need_fullname); |
| 586 | |
| 587 | /* From dwarf2read.c */ |
| 588 | |
| 589 | /* Names for a dwarf2 debugging section. The field NORMAL is the normal |
| 590 | section name (usually from the DWARF standard), while the field COMPRESSED |
| 591 | is the name of compressed sections. If your object file format doesn't |
| 592 | support compressed sections, the field COMPRESSED can be NULL. Likewise, |
| 593 | the debugging section is not supported, the field NORMAL can be NULL too. |
| 594 | It doesn't make sense to have a NULL NORMAL field but a non-NULL COMPRESSED |
| 595 | field. */ |
| 596 | |
| 597 | struct dwarf2_section_names { |
| 598 | const char *normal; |
| 599 | const char *compressed; |
| 600 | }; |
| 601 | |
| 602 | /* List of names for dward2 debugging sections. Also most object file formats |
| 603 | use the standardized (ie ELF) names, some (eg XCOFF) have customized names |
| 604 | due to restrictions. |
| 605 | The table for the standard names is defined in dwarf2read.c. Please |
| 606 | update all instances of dwarf2_debug_sections if you add a field to this |
| 607 | structure. It is always safe to use { NULL, NULL } in this case. */ |
| 608 | |
| 609 | struct dwarf2_debug_sections { |
| 610 | struct dwarf2_section_names info; |
| 611 | struct dwarf2_section_names abbrev; |
| 612 | struct dwarf2_section_names line; |
| 613 | struct dwarf2_section_names loc; |
| 614 | struct dwarf2_section_names macinfo; |
| 615 | struct dwarf2_section_names macro; |
| 616 | struct dwarf2_section_names str; |
| 617 | struct dwarf2_section_names ranges; |
| 618 | struct dwarf2_section_names types; |
| 619 | struct dwarf2_section_names addr; |
| 620 | struct dwarf2_section_names frame; |
| 621 | struct dwarf2_section_names eh_frame; |
| 622 | struct dwarf2_section_names gdb_index; |
| 623 | /* This field has no meaning, but exists solely to catch changes to |
| 624 | this structure which are not reflected in some instance. */ |
| 625 | int sentinel; |
| 626 | }; |
| 627 | |
| 628 | extern int dwarf2_has_info (struct objfile *, |
| 629 | const struct dwarf2_debug_sections *); |
| 630 | |
| 631 | /* Dwarf2 sections that can be accessed by dwarf2_get_section_info. */ |
| 632 | enum dwarf2_section_enum { |
| 633 | DWARF2_DEBUG_FRAME, |
| 634 | DWARF2_EH_FRAME |
| 635 | }; |
| 636 | |
| 637 | extern void dwarf2_get_section_info (struct objfile *, |
| 638 | enum dwarf2_section_enum, |
| 639 | asection **, const gdb_byte **, |
| 640 | bfd_size_type *); |
| 641 | |
| 642 | extern int dwarf2_initialize_objfile (struct objfile *); |
| 643 | extern void dwarf2_build_psymtabs (struct objfile *); |
| 644 | extern void dwarf2_build_frame_info (struct objfile *); |
| 645 | |
| 646 | void dwarf2_free_objfile (struct objfile *); |
| 647 | |
| 648 | /* From mdebugread.c */ |
| 649 | |
| 650 | extern void mdebug_build_psymtabs (struct objfile *, |
| 651 | const struct ecoff_debug_swap *, |
| 652 | struct ecoff_debug_info *); |
| 653 | |
| 654 | extern void elfmdebug_build_psymtabs (struct objfile *, |
| 655 | const struct ecoff_debug_swap *, |
| 656 | asection *); |
| 657 | |
| 658 | /* From minidebug.c. */ |
| 659 | |
| 660 | extern bfd *find_separate_debug_file_in_section (struct objfile *); |
| 661 | |
| 662 | #endif /* !defined(SYMFILE_H) */ |