gdb/objfiles.h

   1 /* Definitions for symbol file management in GDB.
   2
   3    Copyright (C) 1992-2014 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 (OBJFILES_H)
  21 #define OBJFILES_H
  22
  23 #include "gdb_obstack.h"        /* For obstack internals.  */
  24 #include "symfile.h"            /* For struct psymbol_allocation_list.  */
  25 #include "progspace.h"
  26 #include "registry.h"
  27 #include "gdb_bfd.h"
  28
  29 struct bcache;
  30 struct htab;
  31 struct symtab;
  32 struct objfile_data;
  33
  34 /* This structure maintains information on a per-objfile basis about the
  35    "entry point" of the objfile, and the scope within which the entry point
  36    exists.  It is possible that gdb will see more than one objfile that is
  37    executable, each with its own entry point.
  38
  39    For example, for dynamically linked executables in SVR4, the dynamic linker
  40    code is contained within the shared C library, which is actually executable
  41    and is run by the kernel first when an exec is done of a user executable
  42    that is dynamically linked.  The dynamic linker within the shared C library
  43    then maps in the various program segments in the user executable and jumps
  44    to the user executable's recorded entry point, as if the call had been made
  45    directly by the kernel.
  46
  47    The traditional gdb method of using this info was to use the
  48    recorded entry point to set the entry-file's lowpc and highpc from
  49    the debugging information, where these values are the starting
  50    address (inclusive) and ending address (exclusive) of the
  51    instruction space in the executable which correspond to the
  52    "startup file", i.e. crt0.o in most cases.  This file is assumed to
  53    be a startup file and frames with pc's inside it are treated as
  54    nonexistent.  Setting these variables is necessary so that
  55    backtraces do not fly off the bottom of the stack.
  56
  57    NOTE: cagney/2003-09-09: It turns out that this "traditional"
  58    method doesn't work.  Corinna writes: ``It turns out that the call
  59    to test for "inside entry file" destroys a meaningful backtrace
  60    under some conditions.  E.g. the backtrace tests in the asm-source
  61    testcase are broken for some targets.  In this test the functions
  62    are all implemented as part of one file and the testcase is not
  63    necessarily linked with a start file (depending on the target).
  64    What happens is, that the first frame is printed normaly and
  65    following frames are treated as being inside the enttry file then.
  66    This way, only the #0 frame is printed in the backtrace output.''
  67    Ref "frame.c" "NOTE: vinschen/2003-04-01".
  68
  69    Gdb also supports an alternate method to avoid running off the bottom
  70    of the stack.
  71
  72    There are two frames that are "special", the frame for the function
  73    containing the process entry point, since it has no predecessor frame,
  74    and the frame for the function containing the user code entry point
  75    (the main() function), since all the predecessor frames are for the
  76    process startup code.  Since we have no guarantee that the linked
  77    in startup modules have any debugging information that gdb can use,
  78    we need to avoid following frame pointers back into frames that might
  79    have been built in the startup code, as we might get hopelessly
  80    confused.  However, we almost always have debugging information
  81    available for main().
  82
  83    These variables are used to save the range of PC values which are
  84    valid within the main() function and within the function containing
  85    the process entry point.  If we always consider the frame for
  86    main() as the outermost frame when debugging user code, and the
  87    frame for the process entry point function as the outermost frame
  88    when debugging startup code, then all we have to do is have
  89    DEPRECATED_FRAME_CHAIN_VALID return false whenever a frame's
  90    current PC is within the range specified by these variables.  In
  91    essence, we set "ceilings" in the frame chain beyond which we will
  92    not proceed when following the frame chain back up the stack.
  93
  94    A nice side effect is that we can still debug startup code without
  95    running off the end of the frame chain, assuming that we have usable
  96    debugging information in the startup modules, and if we choose to not
  97    use the block at main, or can't find it for some reason, everything
  98    still works as before.  And if we have no startup code debugging
  99    information but we do have usable information for main(), backtraces
 100    from user code don't go wandering off into the startup code.  */
 101
 102 struct entry_info
 103   {
 104     /* The unrelocated value we should use for this objfile entry point.  */
 105     CORE_ADDR entry_point;
 106
 107     /* The index of the section in which the entry point appears.  */
 108     int the_bfd_section_index;
 109
 110     /* Set to 1 iff ENTRY_POINT contains a valid value.  */
 111     unsigned entry_point_p : 1;
 112
 113     /* Set to 1 iff this object was initialized.  */
 114     unsigned initialized : 1;
 115   };
 116
 117 /* Sections in an objfile.  The section offsets are stored in the
 118    OBJFILE.  */
 119
 120 struct obj_section
 121   {
 122     struct bfd_section *the_bfd_section;        /* BFD section pointer */
 123
 124     /* Objfile this section is part of.  */
 125     struct objfile *objfile;
 126
 127     /* True if this "overlay section" is mapped into an "overlay region".  */
 128     int ovly_mapped;
 129   };
 130
 131 /* Relocation offset applied to S.  */
 132 #define obj_section_offset(s)                                           \
 133   (((s)->objfile->section_offsets)->offsets[gdb_bfd_section_index ((s)->objfile->obfd, (s)->the_bfd_section)])
 134
 135 /* The memory address of section S (vma + offset).  */
 136 #define obj_section_addr(s)                                             \
 137   (bfd_get_section_vma ((s)->objfile->obfd, s->the_bfd_section)         \
 138    + obj_section_offset (s))
 139
 140 /* The one-passed-the-end memory address of section S
 141    (vma + size + offset).  */
 142 #define obj_section_endaddr(s)                                          \
 143   (bfd_get_section_vma ((s)->objfile->obfd, s->the_bfd_section)         \
 144    + bfd_get_section_size ((s)->the_bfd_section)                        \
 145    + obj_section_offset (s))
 146
 147 /* The "objstats" structure provides a place for gdb to record some
 148    interesting information about its internal state at runtime, on a
 149    per objfile basis, such as information about the number of symbols
 150    read, size of string table (if any), etc.  */
 151
 152 struct objstats
 153   {
 154     int n_minsyms;              /* Number of minimal symbols read */
 155     int n_psyms;                /* Number of partial symbols read */
 156     int n_syms;                 /* Number of full symbols read */
 157     int n_stabs;                /* Number of ".stabs" read (if applicable) */
 158     int n_types;                /* Number of types */
 159     int sz_strtab;              /* Size of stringtable, (if applicable) */
 160   };
 161
 162 #define OBJSTAT(objfile, expr) (objfile -> stats.expr)
 163 #define OBJSTATS struct objstats stats
 164 extern void print_objfile_statistics (void);
 165 extern void print_symbol_bcache_statistics (void);
 166
 167 /* Number of entries in the minimal symbol hash table.  */
 168 #define MINIMAL_SYMBOL_HASH_SIZE 2039
 169
 170 /* Some objfile data is hung off the BFD.  This enables sharing of the
 171    data across all objfiles using the BFD.  The data is stored in an
 172    instance of this structure, and associated with the BFD using the
 173    registry system.  */
 174
 175 struct objfile_per_bfd_storage
 176 {
 177   /* The storage has an obstack of its own.  */
 178
 179   struct obstack storage_obstack;
 180
 181   /* Byte cache for file names.  */
 182
 183   struct bcache *filename_cache;
 184
 185   /* Byte cache for macros.  */
 186   struct bcache *macro_cache;
 187
 188   /* The gdbarch associated with the BFD.  Note that this gdbarch is
 189      determined solely from BFD information, without looking at target
 190      information.  The gdbarch determined from a running target may
 191      differ from this e.g. with respect to register types and names.  */
 192
 193   struct gdbarch *gdbarch;
 194
 195   /* Hash table for mapping symbol names to demangled names.  Each
 196      entry in the hash table is actually two consecutive strings,
 197      both null-terminated; the first one is a mangled or linkage
 198      name, and the second is the demangled name or just a zero byte
 199      if the name doesn't demangle.  */
 200   struct htab *demangled_names_hash;
 201
 202   /* The per-objfile information about the entry point, the scope (file/func)
 203      containing the entry point, and the scope of the user's main() func.  */
 204
 205   struct entry_info ei;
 206 };
 207
 208 /* Master structure for keeping track of each file from which
 209    gdb reads symbols.  There are several ways these get allocated: 1.
 210    The main symbol file, symfile_objfile, set by the symbol-file command,
 211    2.  Additional symbol files added by the add-symbol-file command,
 212    3.  Shared library objfiles, added by ADD_SOLIB,  4.  symbol files
 213    for modules that were loaded when GDB attached to a remote system
 214    (see remote-vx.c).  */
 215
 216 struct objfile
 217   {
 218
 219     /* All struct objfile's are chained together by their next pointers.
 220        The program space field "objfiles"  (frequently referenced via
 221        the macro "object_files") points to the first link in this
 222        chain.  */
 223
 224     struct objfile *next;
 225
 226     /* The object file's original name as specified by the user,
 227        made absolute, and tilde-expanded.  However, it is not canonicalized
 228        (i.e., it has not been passed through gdb_realpath).
 229        This pointer is never NULL.  This does not have to be freed; it is
 230        guaranteed to have a lifetime at least as long as the objfile.  */
 231
 232     char *original_name;
 233
 234     CORE_ADDR addr_low;
 235
 236     /* Some flag bits for this objfile.
 237        The values are defined by OBJF_*.  */
 238
 239     unsigned short flags;
 240
 241     /* The program space associated with this objfile.  */
 242
 243     struct program_space *pspace;
 244
 245     /* Each objfile points to a linked list of symtabs derived from this file,
 246        one symtab structure for each compilation unit (source file).  Each link
 247        in the symtab list contains a backpointer to this objfile.  */
 248
 249     struct symtab *symtabs;
 250
 251     /* Each objfile points to a linked list of partial symtabs derived from
 252        this file, one partial symtab structure for each compilation unit
 253        (source file).  */
 254
 255     struct partial_symtab *psymtabs;
 256
 257     /* Map addresses to the entries of PSYMTABS.  It would be more efficient to
 258        have a map per the whole process but ADDRMAP cannot selectively remove
 259        its items during FREE_OBJFILE.  This mapping is already present even for
 260        PARTIAL_SYMTABs which still have no corresponding full SYMTABs read.  */
 261
 262     struct addrmap *psymtabs_addrmap;
 263
 264     /* List of freed partial symtabs, available for re-use.  */
 265
 266     struct partial_symtab *free_psymtabs;
 267
 268     /* The object file's BFD.  Can be null if the objfile contains only
 269        minimal symbols, e.g. the run time common symbols for SunOS4.  */
 270
 271     bfd *obfd;
 272
 273     /* The per-BFD data.  Note that this is treated specially if OBFD
 274        is NULL.  */
 275
 276     struct objfile_per_bfd_storage *per_bfd;
 277
 278     /* The modification timestamp of the object file, as of the last time
 279        we read its symbols.  */
 280
 281     long mtime;
 282
 283     /* Obstack to hold objects that should be freed when we load a new symbol
 284        table from this object file.  */
 285
 286     struct obstack objfile_obstack;
 287
 288     /* A byte cache where we can stash arbitrary "chunks" of bytes that
 289        will not change.  */
 290
 291     struct psymbol_bcache *psymbol_cache; /* Byte cache for partial syms.  */
 292
 293     /* Vectors of all partial symbols read in from file.  The actual data
 294        is stored in the objfile_obstack.  */
 295
 296     struct psymbol_allocation_list global_psymbols;
 297     struct psymbol_allocation_list static_psymbols;
 298
 299     /* Each file contains a pointer to an array of minimal symbols for all
 300        global symbols that are defined within the file.  The array is
 301        terminated by a "null symbol", one that has a NULL pointer for the
 302        name and a zero value for the address.  This makes it easy to walk
 303        through the array when passed a pointer to somewhere in the middle
 304        of it.  There is also a count of the number of symbols, which does
 305        not include the terminating null symbol.  The array itself, as well
 306        as all the data that it points to, should be allocated on the
 307        objfile_obstack for this file.  */
 308
 309     struct minimal_symbol *msymbols;
 310     int minimal_symbol_count;
 311
 312     /* This is a hash table used to index the minimal symbols by name.  */
 313
 314     struct minimal_symbol *msymbol_hash[MINIMAL_SYMBOL_HASH_SIZE];
 315
 316     /* This hash table is used to index the minimal symbols by their
 317        demangled names.  */
 318
 319     struct minimal_symbol *msymbol_demangled_hash[MINIMAL_SYMBOL_HASH_SIZE];
 320
 321     /* Structure which keeps track of functions that manipulate objfile's
 322        of the same type as this objfile.  I.e. the function to read partial
 323        symbols for example.  Note that this structure is in statically
 324        allocated memory, and is shared by all objfiles that use the
 325        object module reader of this type.  */
 326
 327     const struct sym_fns *sf;
 328
 329     /* Per objfile data-pointers required by other GDB modules.  */
 330
 331     REGISTRY_FIELDS;
 332
 333     /* Set of relocation offsets to apply to each section.
 334        The table is indexed by the_bfd_section->index, thus it is generally
 335        as large as the number of sections in the binary.
 336        The table is stored on the objfile_obstack.
 337
 338        These offsets indicate that all symbols (including partial and
 339        minimal symbols) which have been read have been relocated by this
 340        much.  Symbols which are yet to be read need to be relocated by it.  */
 341
 342     struct section_offsets *section_offsets;
 343     int num_sections;
 344
 345     /* Indexes in the section_offsets array.  These are initialized by the
 346        *_symfile_offsets() family of functions (som_symfile_offsets,
 347        xcoff_symfile_offsets, default_symfile_offsets).  In theory they
 348        should correspond to the section indexes used by bfd for the
 349        current objfile.  The exception to this for the time being is the
 350        SOM version.  */
 351
 352     int sect_index_text;
 353     int sect_index_data;
 354     int sect_index_bss;
 355     int sect_index_rodata;
 356
 357     /* These pointers are used to locate the section table, which
 358        among other things, is used to map pc addresses into sections.
 359        SECTIONS points to the first entry in the table, and
 360        SECTIONS_END points to the first location past the last entry
 361        in the table.  The table is stored on the objfile_obstack.  The
 362        sections are indexed by the BFD section index; but the
 363        structure data is only valid for certain sections
 364        (e.g. non-empty, SEC_ALLOC).  */
 365
 366     struct obj_section *sections, *sections_end;
 367
 368     /* GDB allows to have debug symbols in separate object files.  This is
 369        used by .gnu_debuglink, ELF build id note and Mach-O OSO.
 370        Although this is a tree structure, GDB only support one level
 371        (ie a separate debug for a separate debug is not supported).  Note that
 372        separate debug object are in the main chain and therefore will be
 373        visited by ALL_OBJFILES & co iterators.  Separate debug objfile always
 374        has a non-nul separate_debug_objfile_backlink.  */
 375
 376     /* Link to the first separate debug object, if any.  */
 377     struct objfile *separate_debug_objfile;
 378
 379     /* If this is a separate debug object, this is used as a link to the
 380        actual executable objfile.  */
 381     struct objfile *separate_debug_objfile_backlink;
 382
 383     /* If this is a separate debug object, this is a link to the next one
 384        for the same executable objfile.  */
 385     struct objfile *separate_debug_objfile_link;
 386
 387     /* Place to stash various statistics about this objfile.  */
 388     OBJSTATS;
 389
 390     /* A linked list of symbols created when reading template types or
 391        function templates.  These symbols are not stored in any symbol
 392        table, so we have to keep them here to relocate them
 393        properly.  */
 394     struct symbol *template_symbols;
 395   };
 396
 397 /* Defines for the objfile flag word.  */
 398
 399 /* When an object file has its functions reordered (currently Irix-5.2
 400    shared libraries exhibit this behaviour), we will need an expensive
 401    algorithm to locate a partial symtab or symtab via an address.
 402    To avoid this penalty for normal object files, we use this flag,
 403    whose setting is determined upon symbol table read in.  */
 404
 405 #define OBJF_REORDERED  (1 << 0)        /* Functions are reordered */
 406
 407 /* Distinguish between an objfile for a shared library and a "vanilla"
 408    objfile.  (If not set, the objfile may still actually be a solib.
 409    This can happen if the user created the objfile by using the
 410    add-symbol-file command.  GDB doesn't in that situation actually
 411    check whether the file is a solib.  Rather, the target's
 412    implementation of the solib interface is responsible for setting
 413    this flag when noticing solibs used by an inferior.)  */
 414
 415 #define OBJF_SHARED     (1 << 1)        /* From a shared library */
 416
 417 /* User requested that this objfile be read in it's entirety.  */
 418
 419 #define OBJF_READNOW    (1 << 2)        /* Immediate full read */
 420
 421 /* This objfile was created because the user explicitly caused it
 422    (e.g., used the add-symbol-file command).  This bit offers a way
 423    for run_command to remove old objfile entries which are no longer
 424    valid (i.e., are associated with an old inferior), but to preserve
 425    ones that the user explicitly loaded via the add-symbol-file
 426    command.  */
 427
 428 #define OBJF_USERLOADED (1 << 3)        /* User loaded */
 429
 430 /* Set if we have tried to read partial symtabs for this objfile.
 431    This is used to allow lazy reading of partial symtabs.  */
 432
 433 #define OBJF_PSYMTABS_READ (1 << 4)
 434
 435 /* Set if this is the main symbol file
 436    (as opposed to symbol file for dynamically loaded code).  */
 437
 438 #define OBJF_MAINLINE (1 << 5)
 439
 440 /* ORIGINAL_NAME and OBFD->FILENAME correspond to text description unrelated to
 441    filesystem names.  It can be for example "<image in memory>".  */
 442
 443 #define OBJF_NOT_FILENAME (1 << 6)
 444
 445 /* Declarations for functions defined in objfiles.c */
 446
 447 extern struct objfile *allocate_objfile (bfd *, const char *name, int);
 448
 449 extern struct gdbarch *get_objfile_arch (struct objfile *);
 450
 451 extern int entry_point_address_query (CORE_ADDR *entry_p);
 452
 453 extern CORE_ADDR entry_point_address (void);
 454
 455 extern void build_objfile_section_table (struct objfile *);
 456
 457 extern void terminate_minimal_symbol_table (struct objfile *objfile);
 458
 459 extern struct objfile *objfile_separate_debug_iterate (const struct objfile *,
 460                                                        const struct objfile *);
 461
 462 extern void put_objfile_before (struct objfile *, struct objfile *);
 463
 464 extern void add_separate_debug_objfile (struct objfile *, struct objfile *);
 465
 466 extern void unlink_objfile (struct objfile *);
 467
 468 extern void free_objfile (struct objfile *);
 469
 470 extern void free_objfile_separate_debug (struct objfile *);
 471
 472 extern struct cleanup *make_cleanup_free_objfile (struct objfile *);
 473
 474 extern void free_all_objfiles (void);
 475
 476 extern void objfile_relocate (struct objfile *, const struct section_offsets *);
 477 extern void objfile_rebase (struct objfile *, CORE_ADDR);
 478
 479 extern int objfile_has_partial_symbols (struct objfile *objfile);
 480
 481 extern int objfile_has_full_symbols (struct objfile *objfile);
 482
 483 extern int objfile_has_symbols (struct objfile *objfile);
 484
 485 extern int have_partial_symbols (void);
 486
 487 extern int have_full_symbols (void);
 488
 489 extern void objfile_set_sym_fns (struct objfile *objfile,
 490                                  const struct sym_fns *sf);
 491
 492 extern void objfiles_changed (void);
 493
 494 extern int is_addr_in_objfile (CORE_ADDR addr, const struct objfile *objfile);
 495
 496 /* This operation deletes all objfile entries that represent solibs that
 497    weren't explicitly loaded by the user, via e.g., the add-symbol-file
 498    command.  */
 499
 500 extern void objfile_purge_solibs (void);
 501
 502 /* Functions for dealing with the minimal symbol table, really a misc
 503    address<->symbol mapping for things we don't have debug symbols for.  */
 504
 505 extern int have_minimal_symbols (void);
 506
 507 extern struct obj_section *find_pc_section (CORE_ADDR pc);
 508
 509 /* Return non-zero if PC is in a section called NAME.  */
 510 extern int pc_in_section (CORE_ADDR, char *);
 511
 512 /* Return non-zero if PC is in a SVR4-style procedure linkage table
 513    section.  */
 514
 515 static inline int
 516 in_plt_section (CORE_ADDR pc)
 517 {
 518   return pc_in_section (pc, ".plt");
 519 }
 520
 521 /* Keep a registry of per-objfile data-pointers required by other GDB
 522    modules.  */
 523 DECLARE_REGISTRY(objfile);
 524
 525 /* In normal use, the section map will be rebuilt by find_pc_section
 526    if objfiles have been added, removed or relocated since it was last
 527    called.  Calling inhibit_section_map_updates will inhibit this
 528    behavior until resume_section_map_updates is called.  If you call
 529    inhibit_section_map_updates you must ensure that every call to
 530    find_pc_section in the inhibited region relates to a section that
 531    is already in the section map and has not since been removed or
 532    relocated.  */
 533 extern void inhibit_section_map_updates (struct program_space *pspace);
 534
 535 /* Resume automatically rebuilding the section map as required.  */
 536 extern void resume_section_map_updates (struct program_space *pspace);
 537
 538 /* Version of the above suitable for use as a cleanup.  */
 539 extern void resume_section_map_updates_cleanup (void *arg);
 540
 541 extern void default_iterate_over_objfiles_in_search_order
 542   (struct gdbarch *gdbarch,
 543    iterate_over_objfiles_in_search_order_cb_ftype *cb,
 544    void *cb_data, struct objfile *current_objfile);
 545 \f
 546
 547 /* Traverse all object files in the current program space.
 548    ALL_OBJFILES_SAFE works even if you delete the objfile during the
 549    traversal.  */
 550
 551 /* Traverse all object files in program space SS.  */
 552
 553 #define ALL_PSPACE_OBJFILES(ss, obj)                                    \
 554   for ((obj) = ss->objfiles; (obj) != NULL; (obj) = (obj)->next)
 555
 556 #define ALL_PSPACE_OBJFILES_SAFE(ss, obj, nxt)          \
 557   for ((obj) = ss->objfiles;                    \
 558        (obj) != NULL? ((nxt)=(obj)->next,1) :0; \
 559        (obj) = (nxt))
 560
 561 #define ALL_OBJFILES(obj)                           \
 562   for ((obj) = current_program_space->objfiles; \
 563        (obj) != NULL;                               \
 564        (obj) = (obj)->next)
 565
 566 #define ALL_OBJFILES_SAFE(obj,nxt)                      \
 567   for ((obj) = current_program_space->objfiles; \
 568        (obj) != NULL? ((nxt)=(obj)->next,1) :0; \
 569        (obj) = (nxt))
 570
 571 /* Traverse all symtabs in one objfile.  */
 572
 573 #define ALL_OBJFILE_SYMTABS(objfile, s) \
 574     for ((s) = (objfile) -> symtabs; (s) != NULL; (s) = (s) -> next)
 575
 576 /* Traverse all primary symtabs in one objfile.  */
 577
 578 #define ALL_OBJFILE_PRIMARY_SYMTABS(objfile, s) \
 579   ALL_OBJFILE_SYMTABS ((objfile), (s)) \
 580     if ((s)->primary)
 581
 582 /* Traverse all minimal symbols in one objfile.  */
 583
 584 #define ALL_OBJFILE_MSYMBOLS(objfile, m) \
 585     for ((m) = (objfile) -> msymbols; SYMBOL_LINKAGE_NAME(m) != NULL; (m)++)
 586
 587 /* Traverse all symtabs in all objfiles in the current symbol
 588    space.  */
 589
 590 #define ALL_SYMTABS(objfile, s) \
 591   ALL_OBJFILES (objfile)         \
 592     ALL_OBJFILE_SYMTABS (objfile, s)
 593
 594 #define ALL_PSPACE_SYMTABS(ss, objfile, s)              \
 595   ALL_PSPACE_OBJFILES (ss, objfile)                     \
 596     ALL_OBJFILE_SYMTABS (objfile, s)
 597
 598 /* Traverse all symtabs in all objfiles in the current program space,
 599    skipping included files (which share a blockvector with their
 600    primary symtab).  */
 601
 602 #define ALL_PRIMARY_SYMTABS(objfile, s) \
 603   ALL_OBJFILES (objfile)                \
 604     ALL_OBJFILE_PRIMARY_SYMTABS (objfile, s)
 605
 606 #define ALL_PSPACE_PRIMARY_SYMTABS(pspace, objfile, s)  \
 607   ALL_PSPACE_OBJFILES (ss, objfile)                     \
 608     ALL_OBJFILE_PRIMARY_SYMTABS (objfile, s)
 609
 610 /* Traverse all minimal symbols in all objfiles in the current symbol
 611    space.  */
 612
 613 #define ALL_MSYMBOLS(objfile, m) \
 614   ALL_OBJFILES (objfile)         \
 615     ALL_OBJFILE_MSYMBOLS (objfile, m)
 616
 617 #define ALL_OBJFILE_OSECTIONS(objfile, osect)   \
 618   for (osect = objfile->sections; osect < objfile->sections_end; osect++) \
 619     if (osect->the_bfd_section == NULL)                                 \
 620       {                                                                 \
 621         /* Nothing.  */                                                 \
 622       }                                                                 \
 623     else
 624
 625 /* Traverse all obj_sections in all objfiles in the current program
 626    space.
 627
 628    Note that this detects a "break" in the inner loop, and exits
 629    immediately from the outer loop as well, thus, client code doesn't
 630    need to know that this is implemented with a double for.  The extra
 631    hair is to make sure that a "break;" stops the outer loop iterating
 632    as well, and both OBJFILE and OSECT are left unmodified:
 633
 634     - The outer loop learns about the inner loop's end condition, and
 635       stops iterating if it detects the inner loop didn't reach its
 636       end.  In other words, the outer loop keeps going only if the
 637       inner loop reached its end cleanly [(osect) ==
 638       (objfile)->sections_end].
 639
 640     - OSECT is initialized in the outer loop initialization
 641       expressions, such as if the inner loop has reached its end, so
 642       the check mentioned above succeeds the first time.
 643
 644     - The trick to not clearing OBJFILE on a "break;" is, in the outer
 645       loop's loop expression, advance OBJFILE, but iff the inner loop
 646       reached its end.  If not, there was a "break;", so leave OBJFILE
 647       as is; the outer loop's conditional will break immediately as
 648       well (as OSECT will be different from OBJFILE->sections_end).  */
 649
 650 #define ALL_OBJSECTIONS(objfile, osect)                                 \
 651   for ((objfile) = current_program_space->objfiles,                     \
 652          (objfile) != NULL ? ((osect) = (objfile)->sections_end) : 0;   \
 653        (objfile) != NULL                                                \
 654          && (osect) == (objfile)->sections_end;                         \
 655        ((osect) == (objfile)->sections_end                              \
 656         ? ((objfile) = (objfile)->next,                                 \
 657            (objfile) != NULL ? (osect) = (objfile)->sections_end : 0)   \
 658         : 0))                                                           \
 659     ALL_OBJFILE_OSECTIONS (objfile, osect)
 660
 661 #define SECT_OFF_DATA(objfile) \
 662      ((objfile->sect_index_data == -1) \
 663       ? (internal_error (__FILE__, __LINE__, \
 664                          _("sect_index_data not initialized")), -1)     \
 665       : objfile->sect_index_data)
 666
 667 #define SECT_OFF_RODATA(objfile) \
 668      ((objfile->sect_index_rodata == -1) \
 669       ? (internal_error (__FILE__, __LINE__, \
 670                          _("sect_index_rodata not initialized")), -1)   \
 671       : objfile->sect_index_rodata)
 672
 673 #define SECT_OFF_TEXT(objfile) \
 674      ((objfile->sect_index_text == -1) \
 675       ? (internal_error (__FILE__, __LINE__, \
 676                          _("sect_index_text not initialized")), -1)     \
 677       : objfile->sect_index_text)
 678
 679 /* Sometimes the .bss section is missing from the objfile, so we don't
 680    want to die here.  Let the users of SECT_OFF_BSS deal with an
 681    uninitialized section index.  */
 682 #define SECT_OFF_BSS(objfile) (objfile)->sect_index_bss
 683
 684 /* Answer whether there is more than one object file loaded.  */
 685
 686 #define MULTI_OBJFILE_P() (object_files && object_files->next)
 687
 688 /* Reset the per-BFD storage area on OBJ.  */
 689
 690 void set_objfile_per_bfd (struct objfile *obj);
 691
 692 const char *objfile_name (const struct objfile *objfile);
 693
 694 #endif /* !defined (OBJFILES_H) */