gdb/symfile.h

   1 /* Definitions for reading symbol files into GDB.
   2
   3    Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
   4    2000, 2001, 2002, 2003, 2004, 2007, 2008, 2009, 2010, 2011
   5    Free Software Foundation, Inc.
   6
   7    This file is part of GDB.
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 3 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  21
  22 #if !defined (SYMFILE_H)
  23 #define SYMFILE_H
  24
  25 /* This file requires that you first include "bfd.h".  */
  26 #include "symtab.h"
  27
  28 /* Opaque declarations.  */
  29 struct target_section;
  30 struct objfile;
  31 struct obj_section;
  32 struct obstack;
  33 struct block;
  34
  35 /* Comparison function for symbol look ups.  */
  36
  37 typedef int (symbol_compare_ftype) (const char *string1,
  38                                     const char *string2);
  39
  40 /* Partial symbols are stored in the psymbol_cache and pointers to
  41    them are kept in a dynamically grown array that is obtained from
  42    malloc and grown as necessary via realloc.  Each objfile typically
  43    has two of these, one for global symbols and one for static
  44    symbols.  Although this adds a level of indirection for storing or
  45    accessing the partial symbols, it allows us to throw away duplicate
  46    psymbols and set all pointers to the single saved instance.  */
  47
  48 struct psymbol_allocation_list
  49 {
  50
  51   /* Pointer to beginning of dynamically allocated array of pointers
  52      to partial symbols.  The array is dynamically expanded as
  53      necessary to accommodate more pointers.  */
  54
  55   struct partial_symbol **list;
  56
  57   /* Pointer to next available slot in which to store a pointer to a
  58      partial symbol.  */
  59
  60   struct partial_symbol **next;
  61
  62   /* Number of allocated pointer slots in current dynamic array (not
  63      the number of bytes of storage).  The "next" pointer will always
  64      point somewhere between list[0] and list[size], and when at
  65      list[size] the array will be expanded on the next attempt to
  66      store a pointer.  */
  67
  68   int size;
  69 };
  70
  71 /* Define an array of addresses to accommodate non-contiguous dynamic
  72    loading of modules.  This is for use when entering commands, so we
  73    can keep track of the section names until we read the file and can
  74    map them to bfd sections.  This structure is also used by solib.c
  75    to communicate the section addresses in shared objects to
  76    symbol_file_add ().  */
  77
  78 struct section_addr_info
  79 {
  80   /* The number of sections for which address information is
  81      available.  */
  82   size_t num_sections;
  83   /* Sections whose names are file format dependent.  */
  84   struct other_sections
  85   {
  86     CORE_ADDR addr;
  87     char *name;
  88
  89     /* SECTINDEX must be valid for associated BFD or set to -1.  */
  90     int sectindex;
  91   } other[1];
  92 };
  93
  94
  95 /* A table listing the load segments in a symfile, and which segment
  96    each BFD section belongs to.  */
  97 struct symfile_segment_data
  98 {
  99   /* How many segments are present in this file.  If there are
 100      two, the text segment is the first one and the data segment
 101      is the second one.  */
 102   int num_segments;
 103
 104   /* If NUM_SEGMENTS is greater than zero, the original base address
 105      of each segment.  */
 106   CORE_ADDR *segment_bases;
 107
 108   /* If NUM_SEGMENTS is greater than zero, the memory size of each
 109      segment.  */
 110   CORE_ADDR *segment_sizes;
 111
 112   /* If NUM_SEGMENTS is greater than zero, this is an array of entries
 113      recording which segment contains each BFD section.
 114      SEGMENT_INFO[I] is S+1 if the I'th BFD section belongs to segment
 115      S, or zero if it is not in any segment.  */
 116   int *segment_info;
 117 };
 118
 119 /* Callback for quick_symbol_functions->map_symbol_filenames.  */
 120
 121 typedef void (symbol_filename_ftype) (const char *filename,
 122                                       const char *fullname, void *data);
 123
 124 /* The "quick" symbol functions exist so that symbol readers can
 125    avoiding an initial read of all the symbols.  For example, symbol
 126    readers might choose to use the "partial symbol table" utilities,
 127    which is one implementation of the quick symbol functions.
 128
 129    The quick symbol functions are generally opaque: the underlying
 130    representation is hidden from the caller.
 131
 132    In general, these functions should only look at whatever special
 133    index the symbol reader creates -- looking through the symbol
 134    tables themselves is handled by generic code.  If a function is
 135    defined as returning a "symbol table", this means that the function
 136    should only return a newly-created symbol table; it should not
 137    examine pre-existing ones.
 138
 139    The exact list of functions here was determined in an ad hoc way
 140    based on gdb's history.  */
 141
 142 struct quick_symbol_functions
 143 {
 144   /* Return true if this objfile has any "partial" symbols
 145      available.  */
 146   int (*has_symbols) (struct objfile *objfile);
 147
 148   /* Return the symbol table for the "last" file appearing in
 149      OBJFILE.  */
 150   struct symtab *(*find_last_source_symtab) (struct objfile *objfile);
 151
 152   /* Forget all cached full file names for OBJFILE.  */
 153   void (*forget_cached_source_info) (struct objfile *objfile);
 154
 155   /* Look up the symbol table, in OBJFILE, of a source file named
 156      NAME.  If there is no '/' in the name, a match after a '/' in the
 157      symbol table's file name will also work.  FULL_PATH is the
 158      absolute file name, and REAL_PATH is the same, run through
 159      gdb_realpath.
 160
 161      If no such symbol table can be found, returns 0.
 162
 163      Otherwise, sets *RESULT to the symbol table and returns 1.  This
 164      might return 1 and set *RESULT to NULL if the requested file is
 165      an include file that does not have a symtab of its own.  */
 166   int (*lookup_symtab) (struct objfile *objfile,
 167                         const char *name,
 168                         const char *full_path,
 169                         const char *real_path,
 170                         struct symtab **result);
 171
 172   /* Check to see if the symbol is defined in a "partial" symbol table
 173      of OBJFILE.  KIND should be either GLOBAL_BLOCK or STATIC_BLOCK,
 174      depending on whether we want to search global symbols or static
 175      symbols.  NAME is the name of the symbol to look for.  DOMAIN
 176      indicates what sort of symbol to search for.
 177
 178      Returns the newly-expanded symbol table in which the symbol is
 179      defined, or NULL if no such symbol table exists.  */
 180   struct symtab *(*lookup_symbol) (struct objfile *objfile,
 181                                    int kind, const char *name,
 182                                    domain_enum domain);
 183
 184   /* This is called to expand symbol tables before looking up a
 185      symbol.  A backend can choose to implement this and then have its
 186      `lookup_symbol' hook always return NULL, or the reverse.  (It
 187      doesn't make sense to implement both.)  The arguments are as for
 188      `lookup_symbol'.  */
 189   void (*pre_expand_symtabs_matching) (struct objfile *objfile,
 190                                        enum block_enum block_kind,
 191                                        const char *name,
 192                                        domain_enum domain);
 193
 194   /* Print statistics about any indices loaded for OBJFILE.  The
 195      statistics should be printed to gdb_stdout.  This is used for
 196      "maint print statistics".  */
 197   void (*print_stats) (struct objfile *objfile);
 198
 199   /* Dump any indices loaded for OBJFILE.  The dump should go to
 200      gdb_stdout.  This is used for "maint print objfiles".  */
 201   void (*dump) (struct objfile *objfile);
 202
 203   /* This is called by objfile_relocate to relocate any indices loaded
 204      for OBJFILE.  */
 205   void (*relocate) (struct objfile *objfile,
 206                     struct section_offsets *new_offsets,
 207                     struct section_offsets *delta);
 208
 209   /* Find all the symbols in OBJFILE named FUNC_NAME, and ensure that
 210      the corresponding symbol tables are loaded.  */
 211   void (*expand_symtabs_for_function) (struct objfile *objfile,
 212                                        const char *func_name);
 213
 214   /* Read all symbol tables associated with OBJFILE.  */
 215   void (*expand_all_symtabs) (struct objfile *objfile);
 216
 217   /* Read all symbol tables associated with OBJFILE which have the
 218      file name FILENAME.
 219      This is for the purposes of examining code only, e.g., expand_line_sal.
 220      The routine may ignore debug info that is known to not be useful with
 221      code, e.g., DW_TAG_type_unit for dwarf debug info.  */
 222   void (*expand_symtabs_with_filename) (struct objfile *objfile,
 223                                         const char *filename);
 224
 225   /* Return the file name of the file holding the global symbol in OBJFILE
 226      named NAME.  If no such symbol exists in OBJFILE, return NULL.  */
 227   const char *(*find_symbol_file) (struct objfile *objfile, const char *name);
 228
 229   /* Find global or static symbols in all tables that are in NAMESPACE
 230      and for which MATCH (symbol name, NAME) == 0, passing each to
 231      CALLBACK, reading in partial symbol tables as needed.  Look
 232      through global symbols if GLOBAL and otherwise static symbols.
 233      Passes NAME, NAMESPACE, and DATA to CALLBACK with each symbol
 234      found.  After each block is processed, passes NULL to CALLBACK.
 235      MATCH must be weaker than strcmp_iw in the sense that
 236      strcmp_iw(x,y) == 0 --> MATCH(x,y) == 0.  ORDERED_COMPARE, if
 237      non-null, must be an ordering relation compatible with strcmp_iw
 238      in the sense that
 239             strcmp_iw(x,y) == 0 --> ORDERED_COMPARE(x,y) == 0
 240      and
 241             strcmp_iw(x,y) <= 0 --> ORDERED_COMPARE(x,y) <= 0
 242      (allowing strcmp_iw(x,y) < 0 while ORDERED_COMPARE(x, y) == 0).
 243      CALLBACK returns 0 to indicate that the scan should continue, or
 244      non-zero to indicate that the scan should be terminated.  */
 245
 246   void (*map_matching_symbols) (const char *name, domain_enum namespace,
 247                                 struct objfile *, int global,
 248                                 int (*callback) (struct block *,
 249                                                  struct symbol *, void *),
 250                                 void *data,
 251                                 symbol_compare_ftype *match,
 252                                 symbol_compare_ftype *ordered_compare);
 253
 254   /* Expand all symbol tables in OBJFILE matching some criteria.
 255
 256      FILE_MATCHER is called for each file in OBJFILE.  The file name
 257      and the DATA argument are passed to it.  If it returns zero, this
 258      file is skipped.  If FILE_MATCHER is NULL such file is not skipped.
 259
 260      Otherwise, if KIND does not match this symbol is skipped.
 261
 262      If even KIND matches, then NAME_MATCHER is called for each symbol defined
 263      in the file.  The symbol's "natural" name and DATA are passed to
 264      NAME_MATCHER.
 265
 266      If NAME_MATCHER returns zero, then this symbol is skipped.
 267
 268      Otherwise, this symbol's symbol table is expanded.
 269
 270      DATA is user data that is passed unmodified to the callback
 271      functions.  */
 272   void (*expand_symtabs_matching) (struct objfile *objfile,
 273                                    int (*file_matcher) (const char *, void *),
 274                                    int (*name_matcher) (const char *, void *),
 275                                    enum search_domain kind,
 276                                    void *data);
 277
 278   /* Return the symbol table from OBJFILE that contains PC and
 279      SECTION.  Return NULL if there is no such symbol table.  This
 280      should return the symbol table that contains a symbol whose
 281      address exactly matches PC, or, if there is no exact match, the
 282      symbol table that contains a symbol whose address is closest to
 283      PC.  */
 284   struct symtab *(*find_pc_sect_symtab) (struct objfile *objfile,
 285                                          struct minimal_symbol *msymbol,
 286                                          CORE_ADDR pc,
 287                                          struct obj_section *section,
 288                                          int warn_if_readin);
 289
 290   /* Call a callback for every file defined in OBJFILE whose symtab is
 291      not already read in.  FUN is the callback.  It is passed the file's
 292      FILENAME, the file's FULLNAME (if need_fullname is non-zero), and
 293      the DATA passed to this function.  */
 294   void (*map_symbol_filenames) (struct objfile *objfile,
 295                                 symbol_filename_ftype *fun, void *data,
 296                                 int need_fullname);
 297 };
 298
 299 /* Structure to keep track of symbol reading functions for various
 300    object file types.  */
 301
 302 struct sym_fns
 303 {
 304
 305   /* BFD flavour that we handle, or (as a special kludge, see
 306      xcoffread.c, (enum bfd_flavour)-1 for xcoff).  */
 307
 308   enum bfd_flavour sym_flavour;
 309
 310   /* Initializes anything that is global to the entire symbol table.
 311      It is called during symbol_file_add, when we begin debugging an
 312      entirely new program.  */
 313
 314   void (*sym_new_init) (struct objfile *);
 315
 316   /* Reads any initial information from a symbol file, and initializes
 317      the struct sym_fns SF in preparation for sym_read().  It is
 318      called every time we read a symbol file for any reason.  */
 319
 320   void (*sym_init) (struct objfile *);
 321
 322   /* sym_read (objfile, symfile_flags) Reads a symbol file into a psymtab
 323      (or possibly a symtab).  OBJFILE is the objfile struct for the
 324      file we are reading.  SYMFILE_FLAGS are the flags passed to
 325      symbol_file_add & co.  */
 326
 327   void (*sym_read) (struct objfile *, int);
 328
 329   /* Read the partial symbols for an objfile.  This may be NULL, in which case
 330      gdb has to check other ways if this objfile has any symbols.  This may
 331      only be non-NULL if the objfile actually does have debuginfo available.
 332      */
 333
 334   void (*sym_read_psymbols) (struct objfile *);
 335
 336   /* Called when we are finished with an objfile.  Should do all
 337      cleanup that is specific to the object file format for the
 338      particular objfile.  */
 339
 340   void (*sym_finish) (struct objfile *);
 341
 342   /* This function produces a file-dependent section_offsets
 343      structure, allocated in the objfile's storage, and based on the
 344      parameter.  The parameter is currently a CORE_ADDR (FIXME!) for
 345      backward compatibility with the higher levels of GDB.  It should
 346      probably be changed to a string, where NULL means the default,
 347      and others are parsed in a file dependent way.  */
 348
 349   void (*sym_offsets) (struct objfile *, struct section_addr_info *);
 350
 351   /* This function produces a format-independent description of
 352      the segments of ABFD.  Each segment is a unit of the file
 353      which may be relocated independently.  */
 354
 355   struct symfile_segment_data *(*sym_segments) (bfd *abfd);
 356
 357   /* This function should read the linetable from the objfile when
 358      the line table cannot be read while processing the debugging
 359      information.  */
 360
 361   void (*sym_read_linetable) (void);
 362
 363   /* Relocate the contents of a debug section SECTP.  The
 364      contents are stored in BUF if it is non-NULL, or returned in a
 365      malloc'd buffer otherwise.  */
 366
 367   bfd_byte *(*sym_relocate) (struct objfile *, asection *sectp, bfd_byte *buf);
 368
 369   /* The "quick" (aka partial) symbol functions for this symbol
 370      reader.  */
 371   const struct quick_symbol_functions *qf;
 372 };
 373
 374 extern struct section_addr_info *
 375   build_section_addr_info_from_objfile (const struct objfile *objfile);
 376
 377 extern void relative_addr_info_to_section_offsets
 378   (struct section_offsets *section_offsets, int num_sections,
 379    struct section_addr_info *addrs);
 380
 381 extern void addr_info_make_relative (struct section_addr_info *addrs,
 382                                      bfd *abfd);
 383
 384 /* The default version of sym_fns.sym_offsets for readers that don't
 385    do anything special.  */
 386
 387 extern void default_symfile_offsets (struct objfile *objfile,
 388                                      struct section_addr_info *);
 389
 390 /* The default version of sym_fns.sym_segments for readers that don't
 391    do anything special.  */
 392
 393 extern struct symfile_segment_data *default_symfile_segments (bfd *abfd);
 394
 395 /* The default version of sym_fns.sym_relocate for readers that don't
 396    do anything special.  */
 397
 398 extern bfd_byte *default_symfile_relocate (struct objfile *objfile,
 399                                            asection *sectp, bfd_byte *buf);
 400
 401 extern struct symtab *allocate_symtab (const char *, struct objfile *);
 402
 403 extern void add_symtab_fns (const struct sym_fns *);
 404
 405 /* This enum encodes bit-flags passed as ADD_FLAGS parameter to
 406    syms_from_objfile, symbol_file_add, etc.  */
 407
 408 enum symfile_add_flags
 409   {
 410     /* Be chatty about what you are doing.  */
 411     SYMFILE_VERBOSE = 1 << 1,
 412
 413     /* This is the main symbol file (as opposed to symbol file for dynamically
 414        loaded code).  */
 415     SYMFILE_MAINLINE = 1 << 2,
 416
 417     /* Do not call breakpoint_re_set when adding this symbol file.  */
 418     SYMFILE_DEFER_BP_RESET = 1 << 3,
 419
 420     /* Do not immediately read symbols for this file.  By default,
 421        symbols are read when the objfile is created.  */
 422     SYMFILE_NO_READ = 1 << 4
 423   };
 424
 425 extern void syms_from_objfile (struct objfile *,
 426                                struct section_addr_info *,
 427                                struct section_offsets *, int, int);
 428
 429 extern void new_symfile_objfile (struct objfile *, int);
 430
 431 extern struct objfile *symbol_file_add (char *, int,
 432                                         struct section_addr_info *, int);
 433
 434 extern struct objfile *symbol_file_add_from_bfd (bfd *, int,
 435                                                  struct section_addr_info *,
 436                                                  int, struct objfile *parent);
 437
 438 extern void symbol_file_add_separate (bfd *, int, struct objfile *);
 439
 440 extern char *find_separate_debug_file_by_debuglink (struct objfile *);
 441
 442 /* Create a new section_addr_info, with room for NUM_SECTIONS.  */
 443
 444 extern struct section_addr_info *alloc_section_addr_info (size_t
 445                                                           num_sections);
 446
 447 /* Build (allocate and populate) a section_addr_info struct from an
 448    existing section table.  */
 449
 450 extern struct section_addr_info
 451   *build_section_addr_info_from_section_table (const struct target_section
 452                                                *start,
 453                                                const struct target_section
 454                                                *end);
 455
 456 /* Free all memory allocated by
 457    build_section_addr_info_from_section_table.  */
 458
 459 extern void free_section_addr_info (struct section_addr_info *);
 460
 461
 462 /* Make a copy of the string at PTR with SIZE characters in the symbol
 463    obstack (and add a null character at the end in the copy).  Returns
 464    the address of the copy.  */
 465
 466 extern char *obsavestring (const char *, int, struct obstack *);
 467
 468 /* Concatenate NULL terminated variable argument list of `const char
 469    *' strings; return the new string.  Space is found in the OBSTACKP.
 470    Argument list must be terminated by a sentinel expression `(char *)
 471    NULL'.  */
 472
 473 extern char *obconcat (struct obstack *obstackp, ...) ATTRIBUTE_SENTINEL;
 474
 475                         /*   Variables   */
 476
 477 /* If non-zero, shared library symbols will be added automatically
 478    when the inferior is created, new libraries are loaded, or when
 479    attaching to the inferior.  This is almost always what users will
 480    want to have happen; but for very large programs, the startup time
 481    will be excessive, and so if this is a problem, the user can clear
 482    this flag and then add the shared library symbols as needed.  Note
 483    that there is a potential for confusion, since if the shared
 484    library symbols are not loaded, commands like "info fun" will *not*
 485    report all the functions that are actually present.  */
 486
 487 extern int auto_solib_add;
 488
 489 /* From symfile.c */
 490
 491 extern void set_initial_language (void);
 492
 493 extern void find_lowest_section (bfd *, asection *, void *);
 494
 495 extern bfd *symfile_bfd_open (char *);
 496
 497 extern bfd *bfd_open_maybe_remote (const char *);
 498
 499 extern int get_section_index (struct objfile *, char *);
 500
 501 /* Utility functions for overlay sections: */
 502 extern enum overlay_debugging_state
 503 {
 504   ovly_off,
 505   ovly_on,
 506   ovly_auto
 507 } overlay_debugging;
 508 extern int overlay_cache_invalid;
 509
 510 /* Return the "mapped" overlay section containing the PC.  */
 511 extern struct obj_section *find_pc_mapped_section (CORE_ADDR);
 512
 513 /* Return any overlay section containing the PC (even in its LMA
 514    region).  */
 515 extern struct obj_section *find_pc_overlay (CORE_ADDR);
 516
 517 /* Return true if the section is an overlay.  */
 518 extern int section_is_overlay (struct obj_section *);
 519
 520 /* Return true if the overlay section is currently "mapped".  */
 521 extern int section_is_mapped (struct obj_section *);
 522
 523 /* Return true if pc belongs to section's VMA.  */
 524 extern CORE_ADDR pc_in_mapped_range (CORE_ADDR, struct obj_section *);
 525
 526 /* Return true if pc belongs to section's LMA.  */
 527 extern CORE_ADDR pc_in_unmapped_range (CORE_ADDR, struct obj_section *);
 528
 529 /* Map an address from a section's LMA to its VMA.  */
 530 extern CORE_ADDR overlay_mapped_address (CORE_ADDR, struct obj_section *);
 531
 532 /* Map an address from a section's VMA to its LMA.  */
 533 extern CORE_ADDR overlay_unmapped_address (CORE_ADDR, struct obj_section *);
 534
 535 /* Convert an address in an overlay section (force into VMA range).  */
 536 extern CORE_ADDR symbol_overlayed_address (CORE_ADDR, struct obj_section *);
 537
 538 /* Load symbols from a file.  */
 539 extern void symbol_file_add_main (char *args, int from_tty);
 540
 541 /* Clear GDB symbol tables.  */
 542 extern void symbol_file_clear (int from_tty);
 543
 544 /* Default overlay update function.  */
 545 extern void simple_overlay_update (struct obj_section *);
 546
 547 extern bfd_byte *symfile_relocate_debug_section (struct objfile *, asection *,
 548                                                  bfd_byte *);
 549
 550 extern int symfile_map_offsets_to_segments (bfd *,
 551                                             struct symfile_segment_data *,
 552                                             struct section_offsets *,
 553                                             int, const CORE_ADDR *);
 554 struct symfile_segment_data *get_symfile_segment_data (bfd *abfd);
 555 void free_symfile_segment_data (struct symfile_segment_data *data);
 556
 557 extern struct cleanup *increment_reading_symtab (void);
 558
 559 /* From dwarf2read.c */
 560
 561 /* Names for a dwarf2 debugging section.  The field NORMAL is the normal
 562    section name (usually from the DWARF standard), while the field COMPRESSED
 563    is the name of compressed sections.  If your object file format doesn't
 564    support compressed sections, the field COMPRESSED can be NULL.  Likewise,
 565    the debugging section is not supported, the field NORMAL can be NULL too.
 566    It doesn't make sense to have a NULL NORMAL field but a non-NULL COMPRESSED
 567    field.  */
 568
 569 struct dwarf2_section_names {
 570   const char *normal;
 571   const char *compressed;
 572 };
 573
 574 /* List of names for dward2 debugging sections.  Also most object file formats
 575    use the standardized (ie ELF) names, some (eg XCOFF) have customized names
 576    due to restrictions.
 577    The table for the standard names is defined in dwarf2read.c.  Please
 578    update all instances of dwarf2_debug_sections if you add a field to this
 579    structure.  It is always safe to use { NULL, NULL } in this case.  */
 580
 581 struct dwarf2_debug_sections {
 582   struct dwarf2_section_names info;
 583   struct dwarf2_section_names abbrev;
 584   struct dwarf2_section_names line;
 585   struct dwarf2_section_names loc;
 586   struct dwarf2_section_names macinfo;
 587   struct dwarf2_section_names macro;
 588   struct dwarf2_section_names str;
 589   struct dwarf2_section_names ranges;
 590   struct dwarf2_section_names types;
 591   struct dwarf2_section_names frame;
 592   struct dwarf2_section_names eh_frame;
 593   struct dwarf2_section_names gdb_index;
 594   /* This field has no meaning, but exists solely to catch changes to
 595      this structure which are not reflected in some instance.  */
 596   int sentinel;
 597 };
 598
 599 extern int dwarf2_has_info (struct objfile *,
 600                             const struct dwarf2_debug_sections *);
 601
 602 /* Dwarf2 sections that can be accessed by dwarf2_get_section_info.  */
 603 enum dwarf2_section_enum {
 604   DWARF2_DEBUG_FRAME,
 605   DWARF2_EH_FRAME
 606 };
 607
 608 extern void dwarf2_get_section_info (struct objfile *,
 609                                      enum dwarf2_section_enum,
 610                                      asection **, gdb_byte **,
 611                                      bfd_size_type *);
 612
 613 extern int dwarf2_initialize_objfile (struct objfile *);
 614 extern void dwarf2_build_psymtabs (struct objfile *);
 615 extern void dwarf2_build_frame_info (struct objfile *);
 616
 617 void dwarf2_free_objfile (struct objfile *);
 618
 619 /* From mdebugread.c */
 620
 621 /* Hack to force structures to exist before use in parameter list.  */
 622 struct ecoff_debug_hack
 623 {
 624   struct ecoff_debug_swap *a;
 625   struct ecoff_debug_info *b;
 626 };
 627
 628 extern void mdebug_build_psymtabs (struct objfile *,
 629                                    const struct ecoff_debug_swap *,
 630                                    struct ecoff_debug_info *);
 631
 632 extern void elfmdebug_build_psymtabs (struct objfile *,
 633                                       const struct ecoff_debug_swap *,
 634                                       asection *);
 635
 636 #endif /* !defined(SYMFILE_H) */