gdb/symfile.h

   1 /* Definitions for reading symbol files into GDB.
   2
   3    Copyright (C) 1990-2020 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 #include "gdbsupport/function-view.h"
  30
  31 /* Opaque declarations.  */
  32 struct target_section;
  33 struct objfile;
  34 struct obj_section;
  35 struct obstack;
  36 struct block;
  37 struct value;
  38 struct frame_info;
  39 struct agent_expr;
  40 struct axs_value;
  41 class probe;
  42
  43 /* Comparison function for symbol look ups.  */
  44
  45 typedef int (symbol_compare_ftype) (const char *string1,
  46                                     const char *string2);
  47
  48 struct other_sections
  49 {
  50   other_sections (CORE_ADDR addr_, std::string &&name_, int sectindex_)
  51     : addr (addr_),
  52       name (std::move (name_)),
  53       sectindex (sectindex_)
  54   {
  55   }
  56
  57   other_sections (other_sections &&other) = default;
  58
  59   DISABLE_COPY_AND_ASSIGN (other_sections);
  60
  61   CORE_ADDR addr;
  62   std::string name;
  63
  64   /* SECTINDEX must be valid for associated BFD or set to -1.
  65      See syms_from_objfile_1 for an exception to this rule.
  66    */
  67   int sectindex;
  68 };
  69
  70 /* Define an array of addresses to accommodate non-contiguous dynamic
  71    loading of modules.  This is for use when entering commands, so we
  72    can keep track of the section names until we read the file and can
  73    map them to bfd sections.  This structure is also used by solib.c
  74    to communicate the section addresses in shared objects to
  75    symbol_file_add ().  */
  76
  77 typedef std::vector<other_sections> section_addr_info;
  78
  79 /* A table listing the load segments in a symfile, and which segment
  80    each BFD section belongs to.  */
  81 struct symfile_segment_data
  82 {
  83   struct segment
  84   {
  85     segment (CORE_ADDR base, CORE_ADDR size)
  86       : base (base), size (size)
  87     {}
  88
  89     /* The original base address the segment.  */
  90     CORE_ADDR base;
  91
  92     /* The memory size of the segment.  */
  93     CORE_ADDR size;
  94   };
  95
  96   ~symfile_segment_data ()
  97   {
  98     xfree (this->segment_info);
  99   }
 100
 101   /* The segments present in this file.  If there are
 102      two, the text segment is the first one and the data segment
 103      is the second one.  */
 104   std::vector<segment> segments;
 105
 106   /* This is an array of entries recording which segment contains each BFD
 107      section.  SEGMENT_INFO[I] is S+1 if the I'th BFD section belongs to segment
 108      S, or zero if it is not in any segment.  */
 109   int *segment_info = nullptr;
 110 };
 111
 112 using symfile_segment_data_up = std::unique_ptr<symfile_segment_data>;
 113
 114 /* Callback for quick_symbol_functions->map_symbol_filenames.  */
 115
 116 typedef void (symbol_filename_ftype) (const char *filename,
 117                                       const char *fullname, void *data);
 118
 119 /* Callback for quick_symbol_functions->expand_symtabs_matching
 120    to match a file name.  */
 121
 122 typedef bool (expand_symtabs_file_matcher_ftype) (const char *filename,
 123                                                   bool basenames);
 124
 125 /* Callback for quick_symbol_functions->expand_symtabs_matching
 126    to match a symbol name.  */
 127
 128 typedef bool (expand_symtabs_symbol_matcher_ftype) (const char *name);
 129
 130 /* Callback for quick_symbol_functions->expand_symtabs_matching
 131    to be called after a symtab has been expanded.  */
 132
 133 typedef void (expand_symtabs_exp_notify_ftype) (compunit_symtab *symtab);
 134
 135 /* The "quick" symbol functions exist so that symbol readers can
 136    avoiding an initial read of all the symbols.  For example, symbol
 137    readers might choose to use the "partial symbol table" utilities,
 138    which is one implementation of the quick symbol functions.
 139
 140    The quick symbol functions are generally opaque: the underlying
 141    representation is hidden from the caller.
 142
 143    In general, these functions should only look at whatever special
 144    index the symbol reader creates -- looking through the symbol
 145    tables themselves is handled by generic code.  If a function is
 146    defined as returning a "symbol table", this means that the function
 147    should only return a newly-created symbol table; it should not
 148    examine pre-existing ones.
 149
 150    The exact list of functions here was determined in an ad hoc way
 151    based on gdb's history.  */
 152
 153 struct quick_symbol_functions
 154 {
 155   /* Return true if this objfile has any "partial" symbols
 156      available.  */
 157   int (*has_symbols) (struct objfile *objfile);
 158
 159   /* Return the symbol table for the "last" file appearing in
 160      OBJFILE.  */
 161   struct symtab *(*find_last_source_symtab) (struct objfile *objfile);
 162
 163   /* Forget all cached full file names for OBJFILE.  */
 164   void (*forget_cached_source_info) (struct objfile *objfile);
 165
 166   /* Expand and iterate over each "partial" symbol table in OBJFILE
 167      where the source file is named NAME.
 168
 169      If NAME is not absolute, a match after a '/' in the symbol table's
 170      file name will also work, REAL_PATH is NULL then.  If NAME is
 171      absolute then REAL_PATH is non-NULL absolute file name as resolved
 172      via gdb_realpath from NAME.
 173
 174      If a match is found, the "partial" symbol table is expanded.
 175      Then, this calls iterate_over_some_symtabs (or equivalent) over
 176      all newly-created symbol tables, passing CALLBACK to it.
 177      The result of this call is returned.  */
 178   bool (*map_symtabs_matching_filename)
 179     (struct objfile *objfile, const char *name, const char *real_path,
 180      gdb::function_view<bool (symtab *)> callback);
 181
 182   /* Check to see if the symbol is defined in a "partial" symbol table
 183      of OBJFILE.  BLOCK_INDEX should be either GLOBAL_BLOCK or STATIC_BLOCK,
 184      depending on whether we want to search global symbols or static
 185      symbols.  NAME is the name of the symbol to look for.  DOMAIN
 186      indicates what sort of symbol to search for.
 187
 188      Returns the newly-expanded compunit in which the symbol is
 189      defined, or NULL if no such symbol table exists.  If OBJFILE
 190      contains !TYPE_OPAQUE symbol prefer its compunit.  If it contains
 191      only TYPE_OPAQUE symbol(s), return at least that compunit.  */
 192   struct compunit_symtab *(*lookup_symbol) (struct objfile *objfile,
 193                                             block_enum block_index,
 194                                             const char *name,
 195                                             domain_enum domain);
 196
 197   /* Check to see if the global symbol is defined in a "partial" symbol table
 198      of OBJFILE. NAME is the name of the symbol to look for.  DOMAIN
 199      indicates what sort of symbol to search for.
 200
 201      If found, sets *symbol_found_p to true and returns the symbol language.
 202      defined, or NULL if no such symbol table exists.  */
 203   enum language (*lookup_global_symbol_language) (struct objfile *objfile,
 204                                                   const char *name,
 205                                                   domain_enum domain,
 206                                                   bool *symbol_found_p);
 207
 208   /* Print statistics about any indices loaded for OBJFILE.  The
 209      statistics should be printed to gdb_stdout.  This is used for
 210      "maint print statistics".  */
 211   void (*print_stats) (struct objfile *objfile);
 212
 213   /* Dump any indices loaded for OBJFILE.  The dump should go to
 214      gdb_stdout.  This is used for "maint print objfiles".  */
 215   void (*dump) (struct objfile *objfile);
 216
 217   /* Find all the symbols in OBJFILE named FUNC_NAME, and ensure that
 218      the corresponding symbol tables are loaded.  */
 219   void (*expand_symtabs_for_function) (struct objfile *objfile,
 220                                        const char *func_name);
 221
 222   /* Read all symbol tables associated with OBJFILE.  */
 223   void (*expand_all_symtabs) (struct objfile *objfile);
 224
 225   /* Read all symbol tables associated with OBJFILE which have
 226      symtab_to_fullname equal to FULLNAME.
 227      This is for the purposes of examining code only, e.g., expand_line_sal.
 228      The routine may ignore debug info that is known to not be useful with
 229      code, e.g., DW_TAG_type_unit for dwarf debug info.  */
 230   void (*expand_symtabs_with_fullname) (struct objfile *objfile,
 231                                         const char *fullname);
 232
 233   /* Find global or static symbols in all tables that are in DOMAIN
 234      and for which MATCH (symbol name, NAME) == 0, passing each to
 235      CALLBACK, reading in partial symbol tables as needed.  Look
 236      through global symbols if GLOBAL and otherwise static symbols.
 237      Passes NAME and NAMESPACE to CALLBACK with each symbol
 238      found.  After each block is processed, passes NULL to CALLBACK.
 239      MATCH must be weaker than strcmp_iw_ordered in the sense that
 240      strcmp_iw_ordered(x,y) == 0 --> MATCH(x,y) == 0.  ORDERED_COMPARE,
 241      if non-null, must be an ordering relation compatible with
 242      strcmp_iw_ordered in the sense that
 243             strcmp_iw_ordered(x,y) == 0 --> ORDERED_COMPARE(x,y) == 0
 244      and
 245             strcmp_iw_ordered(x,y) <= 0 --> ORDERED_COMPARE(x,y) <= 0
 246      (allowing strcmp_iw_ordered(x,y) < 0 while ORDERED_COMPARE(x, y) == 0).
 247      CALLBACK returns true to indicate that the scan should continue, or
 248      false to indicate that the scan should be terminated.  */
 249
 250   void (*map_matching_symbols)
 251     (struct objfile *,
 252      const lookup_name_info &lookup_name,
 253      domain_enum domain,
 254      int global,
 255      gdb::function_view<symbol_found_callback_ftype> callback,
 256      symbol_compare_ftype *ordered_compare);
 257
 258   /* Expand all symbol tables in OBJFILE matching some criteria.
 259
 260      FILE_MATCHER is called for each file in OBJFILE.  The file name
 261      is passed to it.  If the matcher returns false, the file is
 262      skipped.  If FILE_MATCHER is NULL the file is not skipped.  If
 263      BASENAMES is true the matcher should consider only file base
 264      names (the passed file name is already only the lbasename'd
 265      part).
 266
 267      If the file is not skipped, and SYMBOL_MATCHER and LOOKUP_NAME are NULL,
 268      the symbol table is expanded.
 269
 270      Otherwise, individual symbols are considered.
 271
 272      If KIND does not match, the symbol is skipped.
 273
 274      If the symbol name does not match LOOKUP_NAME, the symbol is skipped.
 275
 276      If SYMBOL_MATCHER returns false, then the symbol is skipped.
 277
 278      Otherwise, the symbol's symbol table is expanded.  */
 279   void (*expand_symtabs_matching)
 280     (struct objfile *objfile,
 281      gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher,
 282      const lookup_name_info *lookup_name,
 283      gdb::function_view<expand_symtabs_symbol_matcher_ftype> symbol_matcher,
 284      gdb::function_view<expand_symtabs_exp_notify_ftype> expansion_notify,
 285      enum search_domain kind);
 286
 287   /* Return the comp unit from OBJFILE that contains PC and
 288      SECTION.  Return NULL if there is no such compunit.  This
 289      should return the compunit that contains a symbol whose
 290      address exactly matches PC, or, if there is no exact match, the
 291      compunit that contains a symbol whose address is closest to
 292      PC.  */
 293   struct compunit_symtab *(*find_pc_sect_compunit_symtab)
 294     (struct objfile *objfile, struct bound_minimal_symbol msymbol,
 295      CORE_ADDR pc, struct obj_section *section, int warn_if_readin);
 296
 297   /* Return the comp unit from OBJFILE that contains a symbol at
 298      ADDRESS.  Return NULL if there is no such comp unit.  Unlike
 299      find_pc_sect_compunit_symtab, any sort of symbol (not just text
 300      symbols) can be considered, and only exact address matches are
 301      considered.  This pointer may be NULL.  */
 302   struct compunit_symtab *(*find_compunit_symtab_by_address)
 303     (struct objfile *objfile, CORE_ADDR address);
 304
 305   /* Call a callback for every file defined in OBJFILE whose symtab is
 306      not already read in.  FUN is the callback.  It is passed the file's
 307      FILENAME, the file's FULLNAME (if need_fullname is non-zero), and
 308      the DATA passed to this function.  */
 309   void (*map_symbol_filenames) (struct objfile *objfile,
 310                                 symbol_filename_ftype *fun, void *data,
 311                                 int need_fullname);
 312 };
 313
 314 /* Structure of functions used for probe support.  If one of these functions
 315    is provided, all must be.  */
 316
 317 struct sym_probe_fns
 318 {
 319   /* If non-NULL, return a reference to vector of probe objects.  */
 320   const std::vector<std::unique_ptr<probe>> &(*sym_get_probes)
 321     (struct objfile *);
 322 };
 323
 324 /* Structure to keep track of symbol reading functions for various
 325    object file types.  */
 326
 327 struct sym_fns
 328 {
 329   /* Initializes anything that is global to the entire symbol table.
 330      It is called during symbol_file_add, when we begin debugging an
 331      entirely new program.  */
 332
 333   void (*sym_new_init) (struct objfile *);
 334
 335   /* Reads any initial information from a symbol file, and initializes
 336      the struct sym_fns SF in preparation for sym_read().  It is
 337      called every time we read a symbol file for any reason.  */
 338
 339   void (*sym_init) (struct objfile *);
 340
 341   /* sym_read (objfile, symfile_flags) Reads a symbol file into a psymtab
 342      (or possibly a symtab).  OBJFILE is the objfile struct for the
 343      file we are reading.  SYMFILE_FLAGS are the flags passed to
 344      symbol_file_add & co.  */
 345
 346   void (*sym_read) (struct objfile *, symfile_add_flags);
 347
 348   /* Read the partial symbols for an objfile.  This may be NULL, in which case
 349      gdb has to check other ways if this objfile has any symbols.  This may
 350      only be non-NULL if the objfile actually does have debuginfo available.
 351      */
 352
 353   void (*sym_read_psymbols) (struct objfile *);
 354
 355   /* Called when we are finished with an objfile.  Should do all
 356      cleanup that is specific to the object file format for the
 357      particular objfile.  */
 358
 359   void (*sym_finish) (struct objfile *);
 360
 361
 362   /* This function produces a file-dependent section_offsets
 363      structure, allocated in the objfile's storage.
 364
 365      The section_addr_info structure contains the offset of loadable and
 366      allocated sections, relative to the absolute offsets found in the BFD.  */
 367
 368   void (*sym_offsets) (struct objfile *, const section_addr_info &);
 369
 370   /* This function produces a format-independent description of
 371      the segments of ABFD.  Each segment is a unit of the file
 372      which may be relocated independently.  */
 373
 374   symfile_segment_data_up (*sym_segments) (bfd *abfd);
 375
 376   /* This function should read the linetable from the objfile when
 377      the line table cannot be read while processing the debugging
 378      information.  */
 379
 380   void (*sym_read_linetable) (struct objfile *);
 381
 382   /* Relocate the contents of a debug section SECTP.  The
 383      contents are stored in BUF if it is non-NULL, or returned in a
 384      malloc'd buffer otherwise.  */
 385
 386   bfd_byte *(*sym_relocate) (struct objfile *, asection *sectp, bfd_byte *buf);
 387
 388   /* If non-NULL, this objfile has probe support, and all the probe
 389      functions referred to here will be non-NULL.  */
 390   const struct sym_probe_fns *sym_probe_fns;
 391
 392   /* The "quick" (aka partial) symbol functions for this symbol
 393      reader.  */
 394   const struct quick_symbol_functions *qf;
 395 };
 396
 397 extern section_addr_info
 398   build_section_addr_info_from_objfile (const struct objfile *objfile);
 399
 400 extern void relative_addr_info_to_section_offsets
 401   (section_offsets &section_offsets, const section_addr_info &addrs);
 402
 403 extern void addr_info_make_relative (section_addr_info *addrs,
 404                                      bfd *abfd);
 405
 406 /* The default version of sym_fns.sym_offsets for readers that don't
 407    do anything special.  */
 408
 409 extern void default_symfile_offsets (struct objfile *objfile,
 410                                      const section_addr_info &);
 411
 412 /* The default version of sym_fns.sym_segments for readers that don't
 413    do anything special.  */
 414
 415 extern symfile_segment_data_up default_symfile_segments (bfd *abfd);
 416
 417 /* The default version of sym_fns.sym_relocate for readers that don't
 418    do anything special.  */
 419
 420 extern bfd_byte *default_symfile_relocate (struct objfile *objfile,
 421                                            asection *sectp, bfd_byte *buf);
 422
 423 extern struct symtab *allocate_symtab (struct compunit_symtab *, const char *)
 424   ATTRIBUTE_NONNULL (1);
 425
 426 extern struct compunit_symtab *allocate_compunit_symtab (struct objfile *,
 427                                                          const char *)
 428   ATTRIBUTE_NONNULL (1);
 429
 430 extern void add_compunit_symtab_to_objfile (struct compunit_symtab *cu);
 431
 432 extern void add_symtab_fns (enum bfd_flavour flavour, const struct sym_fns *);
 433
 434 extern void clear_symtab_users (symfile_add_flags add_flags);
 435
 436 extern enum language deduce_language_from_filename (const char *);
 437
 438 /* Map the filename extension EXT to the language LANG.  Any previous
 439    association of EXT will be removed.  EXT will be copied by this
 440    function.  */
 441 extern void add_filename_language (const char *ext, enum language lang);
 442
 443 extern struct objfile *symbol_file_add (const char *, symfile_add_flags,
 444                                         section_addr_info *, objfile_flags);
 445
 446 extern struct objfile *symbol_file_add_from_bfd (bfd *, const char *, symfile_add_flags,
 447                                                  section_addr_info *,
 448                                                  objfile_flags, struct objfile *parent);
 449
 450 extern void symbol_file_add_separate (bfd *, const char *, symfile_add_flags,
 451                                       struct objfile *);
 452
 453 extern std::string find_separate_debug_file_by_debuglink (struct objfile *);
 454
 455 /* Build (allocate and populate) a section_addr_info struct from an
 456    existing section table.  */
 457
 458 extern section_addr_info
 459    build_section_addr_info_from_section_table (const struct target_section
 460                                                *start,
 461                                                const struct target_section
 462                                                *end);
 463
 464                         /*   Variables   */
 465
 466 /* If true, shared library symbols will be added automatically
 467    when the inferior is created, new libraries are loaded, or when
 468    attaching to the inferior.  This is almost always what users will
 469    want to have happen; but for very large programs, the startup time
 470    will be excessive, and so if this is a problem, the user can clear
 471    this flag and then add the shared library symbols as needed.  Note
 472    that there is a potential for confusion, since if the shared
 473    library symbols are not loaded, commands like "info fun" will *not*
 474    report all the functions that are actually present.  */
 475
 476 extern bool auto_solib_add;
 477
 478 /* From symfile.c */
 479
 480 extern void set_initial_language (void);
 481
 482 extern void find_lowest_section (bfd *, asection *, void *);
 483
 484 extern gdb_bfd_ref_ptr symfile_bfd_open (const char *);
 485
 486 extern int get_section_index (struct objfile *, const char *);
 487
 488 extern int print_symbol_loading_p (int from_tty, int mainline, int full);
 489
 490 /* Utility functions for overlay sections: */
 491 extern enum overlay_debugging_state
 492 {
 493   ovly_off,
 494   ovly_on,
 495   ovly_auto
 496 } overlay_debugging;
 497 extern int overlay_cache_invalid;
 498
 499 /* Return the "mapped" overlay section containing the PC.  */
 500 extern struct obj_section *find_pc_mapped_section (CORE_ADDR);
 501
 502 /* Return any overlay section containing the PC (even in its LMA
 503    region).  */
 504 extern struct obj_section *find_pc_overlay (CORE_ADDR);
 505
 506 /* Return true if the section is an overlay.  */
 507 extern int section_is_overlay (struct obj_section *);
 508
 509 /* Return true if the overlay section is currently "mapped".  */
 510 extern int section_is_mapped (struct obj_section *);
 511
 512 /* Return true if pc belongs to section's VMA.  */
 513 extern CORE_ADDR pc_in_mapped_range (CORE_ADDR, struct obj_section *);
 514
 515 /* Return true if pc belongs to section's LMA.  */
 516 extern CORE_ADDR pc_in_unmapped_range (CORE_ADDR, struct obj_section *);
 517
 518 /* Map an address from a section's LMA to its VMA.  */
 519 extern CORE_ADDR overlay_mapped_address (CORE_ADDR, struct obj_section *);
 520
 521 /* Map an address from a section's VMA to its LMA.  */
 522 extern CORE_ADDR overlay_unmapped_address (CORE_ADDR, struct obj_section *);
 523
 524 /* Convert an address in an overlay section (force into VMA range).  */
 525 extern CORE_ADDR symbol_overlayed_address (CORE_ADDR, struct obj_section *);
 526
 527 /* Load symbols from a file.  */
 528 extern void symbol_file_add_main (const char *args,
 529                                   symfile_add_flags add_flags);
 530
 531 /* Clear GDB symbol tables.  */
 532 extern void symbol_file_clear (int from_tty);
 533
 534 /* Default overlay update function.  */
 535 extern void simple_overlay_update (struct obj_section *);
 536
 537 extern bfd_byte *symfile_relocate_debug_section (struct objfile *, asection *,
 538                                                  bfd_byte *);
 539
 540 extern int symfile_map_offsets_to_segments (bfd *,
 541                                             const struct symfile_segment_data *,
 542                                             section_offsets &,
 543                                             int, const CORE_ADDR *);
 544 symfile_segment_data_up get_symfile_segment_data (bfd *abfd);
 545
 546 extern scoped_restore_tmpl<int> increment_reading_symtab (void);
 547
 548 void expand_symtabs_matching
 549   (gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher,
 550    const lookup_name_info &lookup_name,
 551    gdb::function_view<expand_symtabs_symbol_matcher_ftype> symbol_matcher,
 552    gdb::function_view<expand_symtabs_exp_notify_ftype> expansion_notify,
 553    enum search_domain kind);
 554
 555 void map_symbol_filenames (symbol_filename_ftype *fun, void *data,
 556                            int need_fullname);
 557
 558 /* Target-agnostic function to load the sections of an executable into memory.
 559
 560    ARGS should be in the form "EXECUTABLE [OFFSET]", where OFFSET is an
 561    optional offset to apply to each section.  */
 562 extern void generic_load (const char *args, int from_tty);
 563
 564 /* From dwarf2read.c */
 565
 566 /* Names for a dwarf2 debugging section.  The field NORMAL is the normal
 567    section name (usually from the DWARF standard), while the field COMPRESSED
 568    is the name of compressed sections.  If your object file format doesn't
 569    support compressed sections, the field COMPRESSED can be NULL.  Likewise,
 570    the debugging section is not supported, the field NORMAL can be NULL too.
 571    It doesn't make sense to have a NULL NORMAL field but a non-NULL COMPRESSED
 572    field.  */
 573
 574 struct dwarf2_section_names {
 575   const char *normal;
 576   const char *compressed;
 577 };
 578
 579 /* List of names for dward2 debugging sections.  Also most object file formats
 580    use the standardized (ie ELF) names, some (eg XCOFF) have customized names
 581    due to restrictions.
 582    The table for the standard names is defined in dwarf2read.c.  Please
 583    update all instances of dwarf2_debug_sections if you add a field to this
 584    structure.  It is always safe to use { NULL, NULL } in this case.  */
 585
 586 struct dwarf2_debug_sections {
 587   struct dwarf2_section_names info;
 588   struct dwarf2_section_names abbrev;
 589   struct dwarf2_section_names line;
 590   struct dwarf2_section_names loc;
 591   struct dwarf2_section_names loclists;
 592   struct dwarf2_section_names macinfo;
 593   struct dwarf2_section_names macro;
 594   struct dwarf2_section_names str;
 595   struct dwarf2_section_names str_offsets;
 596   struct dwarf2_section_names line_str;
 597   struct dwarf2_section_names ranges;
 598   struct dwarf2_section_names rnglists;
 599   struct dwarf2_section_names types;
 600   struct dwarf2_section_names addr;
 601   struct dwarf2_section_names frame;
 602   struct dwarf2_section_names eh_frame;
 603   struct dwarf2_section_names gdb_index;
 604   struct dwarf2_section_names debug_names;
 605   struct dwarf2_section_names debug_aranges;
 606   /* This field has no meaning, but exists solely to catch changes to
 607      this structure which are not reflected in some instance.  */
 608   int sentinel;
 609 };
 610
 611 extern int dwarf2_has_info (struct objfile *,
 612                             const struct dwarf2_debug_sections *,
 613                             bool = false);
 614
 615 /* Dwarf2 sections that can be accessed by dwarf2_get_section_info.  */
 616 enum dwarf2_section_enum {
 617   DWARF2_DEBUG_FRAME,
 618   DWARF2_EH_FRAME
 619 };
 620
 621 extern void dwarf2_get_section_info (struct objfile *,
 622                                      enum dwarf2_section_enum,
 623                                      asection **, const gdb_byte **,
 624                                      bfd_size_type *);
 625
 626 /* A DWARF names index variant.  */
 627 enum class dw_index_kind
 628 {
 629   /* GDB's own .gdb_index format.   */
 630   GDB_INDEX,
 631
 632   /* DWARF5 .debug_names.  */
 633   DEBUG_NAMES,
 634 };
 635
 636 /* Initialize for reading DWARF for OBJFILE.  Return false if this
 637    file will use psymtabs, or true if using an index, in which case
 638    *INDEX_KIND is set to the index variant in use.  */
 639 extern bool dwarf2_initialize_objfile (struct objfile *objfile,
 640                                        dw_index_kind *index_kind);
 641
 642 extern void dwarf2_build_psymtabs (struct objfile *);
 643 extern void dwarf2_build_frame_info (struct objfile *);
 644
 645 void dwarf2_free_objfile (struct objfile *);
 646
 647 /* From minidebug.c.  */
 648
 649 extern gdb_bfd_ref_ptr find_separate_debug_file_in_section (struct objfile *);
 650
 651 /* True if we are printing debug output about separate debug info files.  */
 652
 653 extern bool separate_debug_file_debug;
 654
 655 #endif /* !defined(SYMFILE_H) */