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