gdb/symfile.h

   1 /* Definitions for reading symbol files into GDB.
   2
   3    Copyright (C) 1990-2017 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 #include "symfile-add-flags.h"
  27 #include "objfile-flags.h"
  28 #include "gdb_bfd.h"
  29
  30 /* Opaque declarations.  */
  31 struct target_section;
  32 struct objfile;
  33 struct obj_section;
  34 struct obstack;
  35 struct block;
  36 struct probe;
  37 struct value;
  38 struct frame_info;
  39 struct agent_expr;
  40 struct axs_value;
  41
  42 /* Comparison function for symbol look ups.  */
  43
  44 typedef int (symbol_compare_ftype) (const char *string1,
  45                                     const char *string2);
  46
  47 /* Partial symbols are stored in the psymbol_cache and pointers to
  48    them are kept in a dynamically grown array that is obtained from
  49    malloc and grown as necessary via realloc.  Each objfile typically
  50    has two of these, one for global symbols and one for static
  51    symbols.  Although this adds a level of indirection for storing or
  52    accessing the partial symbols, it allows us to throw away duplicate
  53    psymbols and set all pointers to the single saved instance.  */
  54
  55 struct psymbol_allocation_list
  56 {
  57
  58   /* Pointer to beginning of dynamically allocated array of pointers
  59      to partial symbols.  The array is dynamically expanded as
  60      necessary to accommodate more pointers.  */
  61
  62   struct partial_symbol **list;
  63
  64   /* Pointer to next available slot in which to store a pointer to a
  65      partial symbol.  */
  66
  67   struct partial_symbol **next;
  68
  69   /* Number of allocated pointer slots in current dynamic array (not
  70      the number of bytes of storage).  The "next" pointer will always
  71      point somewhere between list[0] and list[size], and when at
  72      list[size] the array will be expanded on the next attempt to
  73      store a pointer.  */
  74
  75   int size;
  76 };
  77
  78 struct other_sections
  79 {
  80   CORE_ADDR addr;
  81   char *name;
  82
  83   /* SECTINDEX must be valid for associated BFD or set to -1.  */
  84   int sectindex;
  85 };
  86
  87 /* Define an array of addresses to accommodate non-contiguous dynamic
  88    loading of modules.  This is for use when entering commands, so we
  89    can keep track of the section names until we read the file and can
  90    map them to bfd sections.  This structure is also used by solib.c
  91    to communicate the section addresses in shared objects to
  92    symbol_file_add ().  */
  93
  94 struct section_addr_info
  95 {
  96   /* The number of sections for which address information is
  97      available.  */
  98   size_t num_sections;
  99   /* Sections whose names are file format dependent.  */
 100   struct other_sections other[1];
 101 };
 102
 103
 104 /* A table listing the load segments in a symfile, and which segment
 105    each BFD section belongs to.  */
 106 struct symfile_segment_data
 107 {
 108   /* How many segments are present in this file.  If there are
 109      two, the text segment is the first one and the data segment
 110      is the second one.  */
 111   int num_segments;
 112
 113   /* If NUM_SEGMENTS is greater than zero, the original base address
 114      of each segment.  */
 115   CORE_ADDR *segment_bases;
 116
 117   /* If NUM_SEGMENTS is greater than zero, the memory size of each
 118      segment.  */
 119   CORE_ADDR *segment_sizes;
 120
 121   /* If NUM_SEGMENTS is greater than zero, this is an array of entries
 122      recording which segment contains each BFD section.
 123      SEGMENT_INFO[I] is S+1 if the I'th BFD section belongs to segment
 124      S, or zero if it is not in any segment.  */
 125   int *segment_info;
 126 };
 127
 128 /* Callback for quick_symbol_functions->map_symbol_filenames.  */
 129
 130 typedef void (symbol_filename_ftype) (const char *filename,
 131                                       const char *fullname, void *data);
 132
 133 /* Callback for quick_symbol_functions->expand_symtabs_matching
 134    to match a file name.  */
 135
 136 typedef int (expand_symtabs_file_matcher_ftype) (const char *filename,
 137                                                  void *data, int basenames);
 138
 139 /* Callback for quick_symbol_functions->expand_symtabs_matching
 140    to match a symbol name.  */
 141
 142 typedef int (expand_symtabs_symbol_matcher_ftype) (const char *name,
 143                                                    void *data);
 144
 145 /* Callback for quick_symbol_functions->expand_symtabs_matching
 146    to be called after a symtab has been expanded.  */
 147
 148 typedef void (expand_symtabs_exp_notify_ftype) \
 149   (struct compunit_symtab *symtab, void *data);
 150
 151 /* The "quick" symbol functions exist so that symbol readers can
 152    avoiding an initial read of all the symbols.  For example, symbol
 153    readers might choose to use the "partial symbol table" utilities,
 154    which is one implementation of the quick symbol functions.
 155
 156    The quick symbol functions are generally opaque: the underlying
 157    representation is hidden from the caller.
 158
 159    In general, these functions should only look at whatever special
 160    index the symbol reader creates -- looking through the symbol
 161    tables themselves is handled by generic code.  If a function is
 162    defined as returning a "symbol table", this means that the function
 163    should only return a newly-created symbol table; it should not
 164    examine pre-existing ones.
 165
 166    The exact list of functions here was determined in an ad hoc way
 167    based on gdb's history.  */
 168
 169 struct quick_symbol_functions
 170 {
 171   /* Return true if this objfile has any "partial" symbols
 172      available.  */
 173   int (*has_symbols) (struct objfile *objfile);
 174
 175   /* Return the symbol table for the "last" file appearing in
 176      OBJFILE.  */
 177   struct symtab *(*find_last_source_symtab) (struct objfile *objfile);
 178
 179   /* Forget all cached full file names for OBJFILE.  */
 180   void (*forget_cached_source_info) (struct objfile *objfile);
 181
 182   /* Expand and iterate over each "partial" symbol table in OBJFILE
 183      where the source file is named NAME.
 184
 185      If NAME is not absolute, a match after a '/' in the symbol table's
 186      file name will also work, REAL_PATH is NULL then.  If NAME is
 187      absolute then REAL_PATH is non-NULL absolute file name as resolved
 188      via gdb_realpath from NAME.
 189
 190      If a match is found, the "partial" symbol table is expanded.
 191      Then, this calls iterate_over_some_symtabs (or equivalent) over
 192      all newly-created symbol tables, passing CALLBACK and DATA to it.
 193      The result of this call is returned.  */
 194   int (*map_symtabs_matching_filename) (struct objfile *objfile,
 195                                         const char *name,
 196                                         const char *real_path,
 197                                         int (*callback) (struct symtab *,
 198                                                          void *),
 199                                         void *data);
 200
 201   /* Check to see if the symbol is defined in a "partial" symbol table
 202      of OBJFILE.  BLOCK_INDEX should be either GLOBAL_BLOCK or STATIC_BLOCK,
 203      depending on whether we want to search global symbols or static
 204      symbols.  NAME is the name of the symbol to look for.  DOMAIN
 205      indicates what sort of symbol to search for.
 206
 207      Returns the newly-expanded compunit in which the symbol is
 208      defined, or NULL if no such symbol table exists.  If OBJFILE
 209      contains !TYPE_OPAQUE symbol prefer its compunit.  If it contains
 210      only TYPE_OPAQUE symbol(s), return at least that compunit.  */
 211   struct compunit_symtab *(*lookup_symbol) (struct objfile *objfile,
 212                                             int block_index, const char *name,
 213                                             domain_enum domain);
 214
 215   /* Print statistics about any indices loaded for OBJFILE.  The
 216      statistics should be printed to gdb_stdout.  This is used for
 217      "maint print statistics".  */
 218   void (*print_stats) (struct objfile *objfile);
 219
 220   /* Dump any indices loaded for OBJFILE.  The dump should go to
 221      gdb_stdout.  This is used for "maint print objfiles".  */
 222   void (*dump) (struct objfile *objfile);
 223
 224   /* This is called by objfile_relocate to relocate any indices loaded
 225      for OBJFILE.  */
 226   void (*relocate) (struct objfile *objfile,
 227                     const struct section_offsets *new_offsets,
 228                     const struct section_offsets *delta);
 229
 230   /* Find all the symbols in OBJFILE named FUNC_NAME, and ensure that
 231      the corresponding symbol tables are loaded.  */
 232   void (*expand_symtabs_for_function) (struct objfile *objfile,
 233                                        const char *func_name);
 234
 235   /* Read all symbol tables associated with OBJFILE.  */
 236   void (*expand_all_symtabs) (struct objfile *objfile);
 237
 238   /* Read all symbol tables associated with OBJFILE which have
 239      symtab_to_fullname equal to FULLNAME.
 240      This is for the purposes of examining code only, e.g., expand_line_sal.
 241      The routine may ignore debug info that is known to not be useful with
 242      code, e.g., DW_TAG_type_unit for dwarf debug info.  */
 243   void (*expand_symtabs_with_fullname) (struct objfile *objfile,
 244                                         const char *fullname);
 245
 246   /* Find global or static symbols in all tables that are in DOMAIN
 247      and for which MATCH (symbol name, NAME) == 0, passing each to
 248      CALLBACK, reading in partial symbol tables as needed.  Look
 249      through global symbols if GLOBAL and otherwise static symbols.
 250      Passes NAME, NAMESPACE, and DATA to CALLBACK with each symbol
 251      found.  After each block is processed, passes NULL to CALLBACK.
 252      MATCH must be weaker than strcmp_iw_ordered in the sense that
 253      strcmp_iw_ordered(x,y) == 0 --> MATCH(x,y) == 0.  ORDERED_COMPARE,
 254      if non-null, must be an ordering relation compatible with
 255      strcmp_iw_ordered in the sense that
 256             strcmp_iw_ordered(x,y) == 0 --> ORDERED_COMPARE(x,y) == 0
 257      and
 258             strcmp_iw_ordered(x,y) <= 0 --> ORDERED_COMPARE(x,y) <= 0
 259      (allowing strcmp_iw_ordered(x,y) < 0 while ORDERED_COMPARE(x, y) == 0).
 260      CALLBACK returns 0 to indicate that the scan should continue, or
 261      non-zero to indicate that the scan should be terminated.  */
 262
 263   void (*map_matching_symbols) (struct objfile *,
 264                                 const char *name, domain_enum domain,
 265                                 int global,
 266                                 int (*callback) (struct block *,
 267                                                  struct symbol *, void *),
 268                                 void *data,
 269                                 symbol_compare_ftype *match,
 270                                 symbol_compare_ftype *ordered_compare);
 271
 272   /* Expand all symbol tables in OBJFILE matching some criteria.
 273
 274      FILE_MATCHER is called for each file in OBJFILE.  The file name
 275      and the DATA argument are passed to it.  If it returns zero, this
 276      file is skipped.  If FILE_MATCHER is NULL such file is not skipped.
 277      If BASENAMES is non-zero the function should consider only base name of
 278      DATA (passed file name is already only the lbasename part).
 279
 280      Otherwise, if KIND does not match this symbol is skipped.
 281
 282      If even KIND matches, then SYMBOL_MATCHER is called for each symbol
 283      defined in the file.  The symbol "search" name and DATA are passed
 284      to SYMBOL_MATCHER.
 285
 286      If SYMBOL_MATCHER returns zero, then this symbol is skipped.
 287
 288      Otherwise, this symbol's symbol table is expanded.
 289
 290      DATA is user data that is passed unmodified to the callback
 291      functions.  */
 292   void (*expand_symtabs_matching)
 293     (struct objfile *objfile,
 294      expand_symtabs_file_matcher_ftype *file_matcher,
 295      expand_symtabs_symbol_matcher_ftype *symbol_matcher,
 296      expand_symtabs_exp_notify_ftype *expansion_notify,
 297      enum search_domain kind,
 298      void *data);
 299
 300   /* Return the comp unit from OBJFILE that contains PC and
 301      SECTION.  Return NULL if there is no such compunit.  This
 302      should return the compunit that contains a symbol whose
 303      address exactly matches PC, or, if there is no exact match, the
 304      compunit that contains a symbol whose address is closest to
 305      PC.  */
 306   struct compunit_symtab *(*find_pc_sect_compunit_symtab)
 307     (struct objfile *objfile, struct bound_minimal_symbol msymbol,
 308      CORE_ADDR pc, struct obj_section *section, int warn_if_readin);
 309
 310   /* Call a callback for every file defined in OBJFILE whose symtab is
 311      not already read in.  FUN is the callback.  It is passed the file's
 312      FILENAME, the file's FULLNAME (if need_fullname is non-zero), and
 313      the DATA passed to this function.  */
 314   void (*map_symbol_filenames) (struct objfile *objfile,
 315                                 symbol_filename_ftype *fun, void *data,
 316                                 int need_fullname);
 317 };
 318
 319 /* Structure of functions used for probe support.  If one of these functions
 320    is provided, all must be.  */
 321
 322 struct sym_probe_fns
 323 {
 324   /* If non-NULL, return an array of probe objects.
 325
 326      The returned value does not have to be freed and it has lifetime of the
 327      OBJFILE.  */
 328   VEC (probe_p) *(*sym_get_probes) (struct objfile *);
 329 };
 330
 331 /* Structure to keep track of symbol reading functions for various
 332    object file types.  */
 333
 334 struct sym_fns
 335 {
 336   /* Initializes anything that is global to the entire symbol table.
 337      It is called during symbol_file_add, when we begin debugging an
 338      entirely new program.  */
 339
 340   void (*sym_new_init) (struct objfile *);
 341
 342   /* Reads any initial information from a symbol file, and initializes
 343      the struct sym_fns SF in preparation for sym_read().  It is
 344      called every time we read a symbol file for any reason.  */
 345
 346   void (*sym_init) (struct objfile *);
 347
 348   /* sym_read (objfile, symfile_flags) Reads a symbol file into a psymtab
 349      (or possibly a symtab).  OBJFILE is the objfile struct for the
 350      file we are reading.  SYMFILE_FLAGS are the flags passed to
 351      symbol_file_add & co.  */
 352
 353   void (*sym_read) (struct objfile *, symfile_add_flags);
 354
 355   /* Read the partial symbols for an objfile.  This may be NULL, in which case
 356      gdb has to check other ways if this objfile has any symbols.  This may
 357      only be non-NULL if the objfile actually does have debuginfo available.
 358      */
 359
 360   void (*sym_read_psymbols) (struct objfile *);
 361
 362   /* Called when we are finished with an objfile.  Should do all
 363      cleanup that is specific to the object file format for the
 364      particular objfile.  */
 365
 366   void (*sym_finish) (struct objfile *);
 367
 368
 369   /* This function produces a file-dependent section_offsets
 370      structure, allocated in the objfile's storage.
 371
 372      The section_addr_info structure contains the offset of loadable and
 373      allocated sections, relative to the absolute offsets found in the BFD.  */
 374
 375   void (*sym_offsets) (struct objfile *, const struct section_addr_info *);
 376
 377   /* This function produces a format-independent description of
 378      the segments of ABFD.  Each segment is a unit of the file
 379      which may be relocated independently.  */
 380
 381   struct symfile_segment_data *(*sym_segments) (bfd *abfd);
 382
 383   /* This function should read the linetable from the objfile when
 384      the line table cannot be read while processing the debugging
 385      information.  */
 386
 387   void (*sym_read_linetable) (struct objfile *);
 388
 389   /* Relocate the contents of a debug section SECTP.  The
 390      contents are stored in BUF if it is non-NULL, or returned in a
 391      malloc'd buffer otherwise.  */
 392
 393   bfd_byte *(*sym_relocate) (struct objfile *, asection *sectp, bfd_byte *buf);
 394
 395   /* If non-NULL, this objfile has probe support, and all the probe
 396      functions referred to here will be non-NULL.  */
 397   const struct sym_probe_fns *sym_probe_fns;
 398
 399   /* The "quick" (aka partial) symbol functions for this symbol
 400      reader.  */
 401   const struct quick_symbol_functions *qf;
 402 };
 403
 404 extern struct section_addr_info *
 405   build_section_addr_info_from_objfile (const struct objfile *objfile);
 406
 407 extern void relative_addr_info_to_section_offsets
 408   (struct section_offsets *section_offsets, int num_sections,
 409    const struct section_addr_info *addrs);
 410
 411 extern void addr_info_make_relative (struct section_addr_info *addrs,
 412                                      bfd *abfd);
 413
 414 /* The default version of sym_fns.sym_offsets for readers that don't
 415    do anything special.  */
 416
 417 extern void default_symfile_offsets (struct objfile *objfile,
 418                                      const struct section_addr_info *);
 419
 420 /* The default version of sym_fns.sym_segments for readers that don't
 421    do anything special.  */
 422
 423 extern struct symfile_segment_data *default_symfile_segments (bfd *abfd);
 424
 425 /* The default version of sym_fns.sym_relocate for readers that don't
 426    do anything special.  */
 427
 428 extern bfd_byte *default_symfile_relocate (struct objfile *objfile,
 429                                            asection *sectp, bfd_byte *buf);
 430
 431 extern struct symtab *allocate_symtab (struct compunit_symtab *, const char *)
 432   ATTRIBUTE_NONNULL (1);
 433
 434 extern struct compunit_symtab *allocate_compunit_symtab (struct objfile *,
 435                                                          const char *)
 436   ATTRIBUTE_NONNULL (1);
 437
 438 extern void add_compunit_symtab_to_objfile (struct compunit_symtab *cu);
 439
 440 extern void add_symtab_fns (enum bfd_flavour flavour, const struct sym_fns *);
 441
 442 extern void clear_symtab_users (symfile_add_flags add_flags);
 443
 444 extern enum language deduce_language_from_filename (const char *);
 445
 446 /* Map the filename extension EXT to the language LANG.  Any previous
 447    association of EXT will be removed.  EXT will be copied by this
 448    function.  */
 449 extern void add_filename_language (const char *ext, enum language lang);
 450
 451 extern struct objfile *symbol_file_add (const char *, symfile_add_flags,
 452                                         struct section_addr_info *, objfile_flags);
 453
 454 extern struct objfile *symbol_file_add_from_bfd (bfd *, const char *, symfile_add_flags,
 455                                                  struct section_addr_info *,
 456                                                  objfile_flags, struct objfile *parent);
 457
 458 extern void symbol_file_add_separate (bfd *, const char *, symfile_add_flags,
 459                                       struct objfile *);
 460
 461 extern char *find_separate_debug_file_by_debuglink (struct objfile *);
 462
 463 /* Create a new section_addr_info, with room for NUM_SECTIONS.  */
 464
 465 extern struct section_addr_info *alloc_section_addr_info (size_t
 466                                                           num_sections);
 467
 468 /* Build (allocate and populate) a section_addr_info struct from an
 469    existing section table.  */
 470
 471 extern struct section_addr_info
 472   *build_section_addr_info_from_section_table (const struct target_section
 473                                                *start,
 474                                                const struct target_section
 475                                                *end);
 476
 477 /* Free all memory allocated by
 478    build_section_addr_info_from_section_table.  */
 479
 480 extern void free_section_addr_info (struct section_addr_info *);
 481
 482
 483                         /*   Variables   */
 484
 485 /* If non-zero, shared library symbols will be added automatically
 486    when the inferior is created, new libraries are loaded, or when
 487    attaching to the inferior.  This is almost always what users will
 488    want to have happen; but for very large programs, the startup time
 489    will be excessive, and so if this is a problem, the user can clear
 490    this flag and then add the shared library symbols as needed.  Note
 491    that there is a potential for confusion, since if the shared
 492    library symbols are not loaded, commands like "info fun" will *not*
 493    report all the functions that are actually present.  */
 494
 495 extern int auto_solib_add;
 496
 497 /* From symfile.c */
 498
 499 extern void set_initial_language (void);
 500
 501 extern void find_lowest_section (bfd *, asection *, void *);
 502
 503 extern gdb_bfd_ref_ptr symfile_bfd_open (const char *);
 504
 505 extern int get_section_index (struct objfile *, char *);
 506
 507 extern int print_symbol_loading_p (int from_tty, int mainline, int full);
 508
 509 /* Utility functions for overlay sections: */
 510 extern enum overlay_debugging_state
 511 {
 512   ovly_off,
 513   ovly_on,
 514   ovly_auto
 515 } overlay_debugging;
 516 extern int overlay_cache_invalid;
 517
 518 /* Return the "mapped" overlay section containing the PC.  */
 519 extern struct obj_section *find_pc_mapped_section (CORE_ADDR);
 520
 521 /* Return any overlay section containing the PC (even in its LMA
 522    region).  */
 523 extern struct obj_section *find_pc_overlay (CORE_ADDR);
 524
 525 /* Return true if the section is an overlay.  */
 526 extern int section_is_overlay (struct obj_section *);
 527
 528 /* Return true if the overlay section is currently "mapped".  */
 529 extern int section_is_mapped (struct obj_section *);
 530
 531 /* Return true if pc belongs to section's VMA.  */
 532 extern CORE_ADDR pc_in_mapped_range (CORE_ADDR, struct obj_section *);
 533
 534 /* Return true if pc belongs to section's LMA.  */
 535 extern CORE_ADDR pc_in_unmapped_range (CORE_ADDR, struct obj_section *);
 536
 537 /* Map an address from a section's LMA to its VMA.  */
 538 extern CORE_ADDR overlay_mapped_address (CORE_ADDR, struct obj_section *);
 539
 540 /* Map an address from a section's VMA to its LMA.  */
 541 extern CORE_ADDR overlay_unmapped_address (CORE_ADDR, struct obj_section *);
 542
 543 /* Convert an address in an overlay section (force into VMA range).  */
 544 extern CORE_ADDR symbol_overlayed_address (CORE_ADDR, struct obj_section *);
 545
 546 /* Load symbols from a file.  */
 547 extern void symbol_file_add_main (const char *args,
 548                                   symfile_add_flags add_flags);
 549
 550 /* Clear GDB symbol tables.  */
 551 extern void symbol_file_clear (int from_tty);
 552
 553 /* Default overlay update function.  */
 554 extern void simple_overlay_update (struct obj_section *);
 555
 556 extern bfd_byte *symfile_relocate_debug_section (struct objfile *, asection *,
 557                                                  bfd_byte *);
 558
 559 extern int symfile_map_offsets_to_segments (bfd *,
 560                                             const struct symfile_segment_data *,
 561                                             struct section_offsets *,
 562                                             int, const CORE_ADDR *);
 563 struct symfile_segment_data *get_symfile_segment_data (bfd *abfd);
 564 void free_symfile_segment_data (struct symfile_segment_data *data);
 565
 566 extern struct cleanup *increment_reading_symtab (void);
 567
 568 void expand_symtabs_matching (expand_symtabs_file_matcher_ftype *,
 569                               expand_symtabs_symbol_matcher_ftype *,
 570                               expand_symtabs_exp_notify_ftype *,
 571                               enum search_domain kind, void *data);
 572
 573 void map_symbol_filenames (symbol_filename_ftype *fun, void *data,
 574                            int need_fullname);
 575
 576 /* From dwarf2read.c */
 577
 578 /* Names for a dwarf2 debugging section.  The field NORMAL is the normal
 579    section name (usually from the DWARF standard), while the field COMPRESSED
 580    is the name of compressed sections.  If your object file format doesn't
 581    support compressed sections, the field COMPRESSED can be NULL.  Likewise,
 582    the debugging section is not supported, the field NORMAL can be NULL too.
 583    It doesn't make sense to have a NULL NORMAL field but a non-NULL COMPRESSED
 584    field.  */
 585
 586 struct dwarf2_section_names {
 587   const char *normal;
 588   const char *compressed;
 589 };
 590
 591 /* List of names for dward2 debugging sections.  Also most object file formats
 592    use the standardized (ie ELF) names, some (eg XCOFF) have customized names
 593    due to restrictions.
 594    The table for the standard names is defined in dwarf2read.c.  Please
 595    update all instances of dwarf2_debug_sections if you add a field to this
 596    structure.  It is always safe to use { NULL, NULL } in this case.  */
 597
 598 struct dwarf2_debug_sections {
 599   struct dwarf2_section_names info;
 600   struct dwarf2_section_names abbrev;
 601   struct dwarf2_section_names line;
 602   struct dwarf2_section_names loc;
 603   struct dwarf2_section_names loclists;
 604   struct dwarf2_section_names macinfo;
 605   struct dwarf2_section_names macro;
 606   struct dwarf2_section_names str;
 607   struct dwarf2_section_names line_str;
 608   struct dwarf2_section_names ranges;
 609   struct dwarf2_section_names rnglists;
 610   struct dwarf2_section_names types;
 611   struct dwarf2_section_names addr;
 612   struct dwarf2_section_names frame;
 613   struct dwarf2_section_names eh_frame;
 614   struct dwarf2_section_names gdb_index;
 615   /* This field has no meaning, but exists solely to catch changes to
 616      this structure which are not reflected in some instance.  */
 617   int sentinel;
 618 };
 619
 620 extern int dwarf2_has_info (struct objfile *,
 621                             const struct dwarf2_debug_sections *);
 622
 623 /* Dwarf2 sections that can be accessed by dwarf2_get_section_info.  */
 624 enum dwarf2_section_enum {
 625   DWARF2_DEBUG_FRAME,
 626   DWARF2_EH_FRAME
 627 };
 628
 629 extern void dwarf2_get_section_info (struct objfile *,
 630                                      enum dwarf2_section_enum,
 631                                      asection **, const gdb_byte **,
 632                                      bfd_size_type *);
 633
 634 extern int dwarf2_initialize_objfile (struct objfile *);
 635 extern void dwarf2_build_psymtabs (struct objfile *);
 636 extern void dwarf2_build_frame_info (struct objfile *);
 637
 638 void dwarf2_free_objfile (struct objfile *);
 639
 640 /* From mdebugread.c */
 641
 642 extern void mdebug_build_psymtabs (minimal_symbol_reader &,
 643                                    struct objfile *,
 644                                    const struct ecoff_debug_swap *,
 645                                    struct ecoff_debug_info *);
 646
 647 extern void elfmdebug_build_psymtabs (struct objfile *,
 648                                       const struct ecoff_debug_swap *,
 649                                       asection *);
 650
 651 /* From minidebug.c.  */
 652
 653 extern gdb_bfd_ref_ptr find_separate_debug_file_in_section (struct objfile *);
 654
 655 #endif /* !defined(SYMFILE_H) */