gdb/objfiles.h

   1 /* Definitions for symbol file management in GDB.
   2
   3    Copyright 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
   4    2001, 2002, 2003 Free Software Foundation, Inc.
   5
   6    This file is part of GDB.
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 2 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program; if not, write to the Free Software
  20    Foundation, Inc., 59 Temple Place - Suite 330,
  21    Boston, MA 02111-1307, USA.  */
  22
  23 #if !defined (OBJFILES_H)
  24 #define OBJFILES_H
  25
  26 #include "gdb_obstack.h"        /* For obstack internals.  */
  27 #include "symfile.h"            /* For struct psymbol_allocation_list */
  28
  29 struct bcache;
  30 struct htab;
  31 struct symtab;
  32
  33 /* This structure maintains information on a per-objfile basis about the
  34    "entry point" of the objfile, and the scope within which the entry point
  35    exists.  It is possible that gdb will see more than one objfile that is
  36    executable, each with its own entry point.
  37
  38    For example, for dynamically linked executables in SVR4, the dynamic linker
  39    code is contained within the shared C library, which is actually executable
  40    and is run by the kernel first when an exec is done of a user executable
  41    that is dynamically linked.  The dynamic linker within the shared C library
  42    then maps in the various program segments in the user executable and jumps
  43    to the user executable's recorded entry point, as if the call had been made
  44    directly by the kernel.
  45
  46    The traditional gdb method of using this info is to use the
  47    recorded entry point to set the variables
  48    deprecated_entry_file_lowpc and deprecated_entry_file_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 deprecated_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    To use this method, define your DEPRECATED_FRAME_CHAIN_VALID macro
 103    like:
 104
 105    #define DEPRECATED_FRAME_CHAIN_VALID(chain, thisframe)     \
 106    (chain != 0                                   \
 107    && !(inside_main_func ((thisframe)->pc))     \
 108    && !(inside_entry_func ((thisframe)->pc)))
 109
 110    and add initializations of the four scope controlling variables inside
 111    the object file / debugging information processing modules.  */
 112
 113 struct entry_info
 114   {
 115
 116     /* The value we should use for this objects entry point.
 117        The illegal/unknown value needs to be something other than 0, ~0
 118        for instance, which is much less likely than 0. */
 119
 120     CORE_ADDR entry_point;
 121
 122 #define INVALID_ENTRY_POINT (~0)        /* ~0 will not be in any file, we hope.  */
 123
 124     /* Start (inclusive) and end (exclusive) of function containing the
 125        entry point. */
 126
 127     CORE_ADDR entry_func_lowpc;
 128     CORE_ADDR entry_func_highpc;
 129
 130     /* Start (inclusive) and end (exclusive) of object file containing the
 131        entry point. */
 132
 133     CORE_ADDR deprecated_entry_file_lowpc;
 134     CORE_ADDR deprecated_entry_file_highpc;
 135
 136     /* Start (inclusive) and end (exclusive) of the user code main() function. */
 137
 138     CORE_ADDR main_func_lowpc;
 139     CORE_ADDR main_func_highpc;
 140
 141 /* Use these values when any of the above ranges is invalid.  */
 142
 143 /* We use these values because it guarantees that there is no number that is
 144    both >= LOWPC && < HIGHPC.  It is also highly unlikely that 3 is a valid
 145    module or function start address (as opposed to 0).  */
 146
 147 #define INVALID_ENTRY_LOWPC (3)
 148 #define INVALID_ENTRY_HIGHPC (1)
 149
 150   };
 151
 152 /* Sections in an objfile.
 153
 154    It is strange that we have both this notion of "sections"
 155    and the one used by section_offsets.  Section as used
 156    here, (currently at least) means a BFD section, and the sections
 157    are set up from the BFD sections in allocate_objfile.
 158
 159    The sections in section_offsets have their meaning determined by
 160    the symbol format, and they are set up by the sym_offsets function
 161    for that symbol file format.
 162
 163    I'm not sure this could or should be changed, however.  */
 164
 165 struct obj_section
 166   {
 167     CORE_ADDR addr;             /* lowest address in section */
 168     CORE_ADDR endaddr;          /* 1+highest address in section */
 169
 170     /* This field is being used for nefarious purposes by syms_from_objfile.
 171        It is said to be redundant with section_offsets; it's not really being
 172        used that way, however, it's some sort of hack I don't understand
 173        and am not going to try to eliminate (yet, anyway).  FIXME.
 174
 175        It was documented as "offset between (end)addr and actual memory
 176        addresses", but that's not true; addr & endaddr are actual memory
 177        addresses.  */
 178     CORE_ADDR offset;
 179
 180     sec_ptr the_bfd_section;    /* BFD section pointer */
 181
 182     /* Objfile this section is part of.  */
 183     struct objfile *objfile;
 184
 185     /* True if this "overlay section" is mapped into an "overlay region". */
 186     int ovly_mapped;
 187   };
 188
 189 /* An import entry contains information about a symbol that
 190    is used in this objfile but not defined in it, and so needs
 191    to be imported from some other objfile */
 192 /* Currently we just store the name; no attributes. 1997-08-05 */
 193 typedef char *ImportEntry;
 194
 195
 196 /* An export entry contains information about a symbol that
 197    is defined in this objfile and available for use in other
 198    objfiles */
 199 typedef struct
 200   {
 201     char *name;                 /* name of exported symbol */
 202     int address;                /* offset subject to relocation */
 203     /* Currently no other attributes 1997-08-05 */
 204   }
 205 ExportEntry;
 206
 207
 208 /* The "objstats" structure provides a place for gdb to record some
 209    interesting information about its internal state at runtime, on a
 210    per objfile basis, such as information about the number of symbols
 211    read, size of string table (if any), etc. */
 212
 213 struct objstats
 214   {
 215     int n_minsyms;              /* Number of minimal symbols read */
 216     int n_psyms;                /* Number of partial symbols read */
 217     int n_syms;                 /* Number of full symbols read */
 218     int n_stabs;                /* Number of ".stabs" read (if applicable) */
 219     int n_types;                /* Number of types */
 220     int sz_strtab;              /* Size of stringtable, (if applicable) */
 221   };
 222
 223 #define OBJSTAT(objfile, expr) (objfile -> stats.expr)
 224 #define OBJSTATS struct objstats stats
 225 extern void print_objfile_statistics (void);
 226 extern void print_symbol_bcache_statistics (void);
 227
 228 /* Number of entries in the minimal symbol hash table.  */
 229 #define MINIMAL_SYMBOL_HASH_SIZE 2039
 230
 231 /* Master structure for keeping track of each file from which
 232    gdb reads symbols.  There are several ways these get allocated: 1.
 233    The main symbol file, symfile_objfile, set by the symbol-file command,
 234    2.  Additional symbol files added by the add-symbol-file command,
 235    3.  Shared library objfiles, added by ADD_SOLIB,  4.  symbol files
 236    for modules that were loaded when GDB attached to a remote system
 237    (see remote-vx.c).  */
 238
 239 struct objfile
 240   {
 241
 242     /* All struct objfile's are chained together by their next pointers.
 243        The global variable "object_files" points to the first link in this
 244        chain.
 245
 246        FIXME:  There is a problem here if the objfile is reusable, and if
 247        multiple users are to be supported.  The problem is that the objfile
 248        list is linked through a member of the objfile struct itself, which
 249        is only valid for one gdb process.  The list implementation needs to
 250        be changed to something like:
 251
 252        struct list {struct list *next; struct objfile *objfile};
 253
 254        where the list structure is completely maintained separately within
 255        each gdb process. */
 256
 257     struct objfile *next;
 258
 259     /* The object file's name, tilde-expanded and absolute.
 260        Malloc'd; free it if you free this struct.  */
 261
 262     char *name;
 263
 264     /* Some flag bits for this objfile. */
 265
 266     unsigned short flags;
 267
 268     /* Each objfile points to a linked list of symtabs derived from this file,
 269        one symtab structure for each compilation unit (source file).  Each link
 270        in the symtab list contains a backpointer to this objfile. */
 271
 272     struct symtab *symtabs;
 273
 274     /* Each objfile points to a linked list of partial symtabs derived from
 275        this file, one partial symtab structure for each compilation unit
 276        (source file). */
 277
 278     struct partial_symtab *psymtabs;
 279
 280     /* List of freed partial symtabs, available for re-use */
 281
 282     struct partial_symtab *free_psymtabs;
 283
 284     /* The object file's BFD.  Can be null if the objfile contains only
 285        minimal symbols, e.g. the run time common symbols for SunOS4.  */
 286
 287     bfd *obfd;
 288
 289     /* The modification timestamp of the object file, as of the last time
 290        we read its symbols.  */
 291
 292     long mtime;
 293
 294     /* Obstacks to hold objects that should be freed when we load a new symbol
 295        table from this object file. */
 296
 297     struct obstack psymbol_obstack;     /* Partial symbols */
 298     struct obstack symbol_obstack;      /* Full symbols */
 299     struct obstack type_obstack;        /* Types */
 300
 301     /* A byte cache where we can stash arbitrary "chunks" of bytes that
 302        will not change. */
 303
 304     struct bcache *psymbol_cache;       /* Byte cache for partial syms */
 305     struct bcache *macro_cache;          /* Byte cache for macros */
 306
 307     /* Hash table for mapping symbol names to demangled names.  Each
 308        entry in the hash table is actually two consecutive strings,
 309        both null-terminated; the first one is a mangled or linkage
 310        name, and the second is the demangled name or just a zero byte
 311        if the name doesn't demangle.  */
 312     struct htab *demangled_names_hash;
 313
 314     /* Vectors of all partial symbols read in from file.  The actual data
 315        is stored in the psymbol_obstack. */
 316
 317     struct psymbol_allocation_list global_psymbols;
 318     struct psymbol_allocation_list static_psymbols;
 319
 320     /* Each file contains a pointer to an array of minimal symbols for all
 321        global symbols that are defined within the file.  The array is terminated
 322        by a "null symbol", one that has a NULL pointer for the name and a zero
 323        value for the address.  This makes it easy to walk through the array
 324        when passed a pointer to somewhere in the middle of it.  There is also
 325        a count of the number of symbols, which does not include the terminating
 326        null symbol.  The array itself, as well as all the data that it points
 327        to, should be allocated on the symbol_obstack for this file. */
 328
 329     struct minimal_symbol *msymbols;
 330     int minimal_symbol_count;
 331
 332     /* This is a hash table used to index the minimal symbols by name.  */
 333
 334     struct minimal_symbol *msymbol_hash[MINIMAL_SYMBOL_HASH_SIZE];
 335
 336     /* This hash table is used to index the minimal symbols by their
 337        demangled names.  */
 338
 339     struct minimal_symbol *msymbol_demangled_hash[MINIMAL_SYMBOL_HASH_SIZE];
 340
 341     /* For object file formats which don't specify fundamental types, gdb
 342        can create such types.  For now, it maintains a vector of pointers
 343        to these internally created fundamental types on a per objfile basis,
 344        however it really should ultimately keep them on a per-compilation-unit
 345        basis, to account for linkage-units that consist of a number of
 346        compilation units that may have different fundamental types, such as
 347        linking C modules with ADA modules, or linking C modules that are
 348        compiled with 32-bit ints with C modules that are compiled with 64-bit
 349        ints (not inherently evil with a smarter linker). */
 350
 351     struct type **fundamental_types;
 352
 353     /* The mmalloc() malloc-descriptor for this objfile if we are using
 354        the memory mapped malloc() package to manage storage for this objfile's
 355        data.  NULL if we are not. */
 356
 357     void *md;
 358
 359     /* The file descriptor that was used to obtain the mmalloc descriptor
 360        for this objfile.  If we call mmalloc_detach with the malloc descriptor
 361        we should then close this file descriptor. */
 362
 363     int mmfd;
 364
 365     /* Structure which keeps track of functions that manipulate objfile's
 366        of the same type as this objfile.  I.E. the function to read partial
 367        symbols for example.  Note that this structure is in statically
 368        allocated memory, and is shared by all objfiles that use the
 369        object module reader of this type. */
 370
 371     struct sym_fns *sf;
 372
 373     /* The per-objfile information about the entry point, the scope (file/func)
 374        containing the entry point, and the scope of the user's main() func. */
 375
 376     struct entry_info ei;
 377
 378     /* Information about stabs.  Will be filled in with a dbx_symfile_info
 379        struct by those readers that need it. */
 380
 381     struct dbx_symfile_info *sym_stab_info;
 382
 383     /* Hook for information for use by the symbol reader (currently used
 384        for information shared by sym_init and sym_read).  It is
 385        typically a pointer to malloc'd memory.  The symbol reader's finish
 386        function is responsible for freeing the memory thusly allocated.  */
 387
 388     void *sym_private;
 389
 390     /* Hook for target-architecture-specific information.  This must
 391        point to memory allocated on one of the obstacks in this objfile,
 392        so that it gets freed automatically when reading a new object
 393        file. */
 394
 395     void *obj_private;
 396
 397     /* Per objfile data-pointers required by other GDB modules.  */
 398     /* FIXME: kettenis/20030711: This mechanism could replace
 399        sym_stab_info, sym_private and obj_private entirely.  */
 400
 401     void **data;
 402     unsigned num_data;
 403
 404     /* Set of relocation offsets to apply to each section.
 405        Currently on the psymbol_obstack (which makes no sense, but I'm
 406        not sure it's harming anything).
 407
 408        These offsets indicate that all symbols (including partial and
 409        minimal symbols) which have been read have been relocated by this
 410        much.  Symbols which are yet to be read need to be relocated by
 411        it.  */
 412
 413     struct section_offsets *section_offsets;
 414     int num_sections;
 415
 416     /* Indexes in the section_offsets array. These are initialized by the
 417        *_symfile_offsets() family of functions (som_symfile_offsets,
 418        xcoff_symfile_offsets, default_symfile_offsets). In theory they
 419        should correspond to the section indexes used by bfd for the
 420        current objfile. The exception to this for the time being is the
 421        SOM version. */
 422
 423     int sect_index_text;
 424     int sect_index_data;
 425     int sect_index_bss;
 426     int sect_index_rodata;
 427
 428     /* These pointers are used to locate the section table, which
 429        among other things, is used to map pc addresses into sections.
 430        SECTIONS points to the first entry in the table, and
 431        SECTIONS_END points to the first location past the last entry
 432        in the table.  Currently the table is stored on the
 433        psymbol_obstack (which makes no sense, but I'm not sure it's
 434        harming anything).  */
 435
 436     struct obj_section
 437      *sections, *sections_end;
 438
 439     /* two auxiliary fields, used to hold the fp of separate symbol files */
 440     FILE *auxf1, *auxf2;
 441
 442     /* Imported symbols */
 443     ImportEntry *import_list;
 444     int import_list_size;
 445
 446     /* Exported symbols */
 447     ExportEntry *export_list;
 448     int export_list_size;
 449
 450     /* Link to objfile that contains the debug symbols for this one.
 451        One is loaded if this file has an debug link to an existing
 452        debug file with the right checksum */
 453     struct objfile *separate_debug_objfile;
 454
 455     /* If this is a separate debug object, this is used as a link to the
 456        actual executable objfile. */
 457     struct objfile *separate_debug_objfile_backlink;
 458
 459     /* Place to stash various statistics about this objfile */
 460       OBJSTATS;
 461
 462     /* A symtab that the C++ code uses to stash special symbols
 463        associated to namespaces.  */
 464
 465     /* FIXME/carlton-2003-06-27: Delete this in a few years once
 466        "possible namespace symbols" go away.  */
 467     struct symtab *cp_namespace_symtab;
 468   };
 469
 470 /* Defines for the objfile flag word. */
 471
 472 /* Gdb can arrange to allocate storage for all objects related to a
 473    particular objfile in a designated section of its address space,
 474    managed at a low level by mmap() and using a special version of
 475    malloc that handles malloc/free/realloc on top of the mmap() interface.
 476    This allows the "internal gdb state" for a particular objfile to be
 477    dumped to a gdb state file and subsequently reloaded at a later time. */
 478
 479 #define OBJF_MAPPED     (1 << 0)        /* Objfile data is mmap'd */
 480
 481 /* When using mapped/remapped predigested gdb symbol information, we need
 482    a flag that indicates that we have previously done an initial symbol
 483    table read from this particular objfile.  We can't just look for the
 484    absence of any of the three symbol tables (msymbols, psymtab, symtab)
 485    because if the file has no symbols for example, none of these will
 486    exist. */
 487
 488 #define OBJF_SYMS       (1 << 1)        /* Have tried to read symbols */
 489
 490 /* When an object file has its functions reordered (currently Irix-5.2
 491    shared libraries exhibit this behaviour), we will need an expensive
 492    algorithm to locate a partial symtab or symtab via an address.
 493    To avoid this penalty for normal object files, we use this flag,
 494    whose setting is determined upon symbol table read in.  */
 495
 496 #define OBJF_REORDERED  (1 << 2)        /* Functions are reordered */
 497
 498 /* Distinguish between an objfile for a shared library and a "vanilla"
 499    objfile. (If not set, the objfile may still actually be a solib.
 500    This can happen if the user created the objfile by using the
 501    add-symbol-file command.  GDB doesn't in that situation actually
 502    check whether the file is a solib.  Rather, the target's
 503    implementation of the solib interface is responsible for setting
 504    this flag when noticing solibs used by an inferior.)  */
 505
 506 #define OBJF_SHARED     (1 << 3)        /* From a shared library */
 507
 508 /* User requested that this objfile be read in it's entirety. */
 509
 510 #define OBJF_READNOW    (1 << 4)        /* Immediate full read */
 511
 512 /* This objfile was created because the user explicitly caused it
 513    (e.g., used the add-symbol-file command).  This bit offers a way
 514    for run_command to remove old objfile entries which are no longer
 515    valid (i.e., are associated with an old inferior), but to preserve
 516    ones that the user explicitly loaded via the add-symbol-file
 517    command. */
 518
 519 #define OBJF_USERLOADED (1 << 5)        /* User loaded */
 520
 521 /* The object file that the main symbol table was loaded from (e.g. the
 522    argument to the "symbol-file" or "file" command).  */
 523
 524 extern struct objfile *symfile_objfile;
 525
 526 /* The object file that contains the runtime common minimal symbols
 527    for SunOS4. Note that this objfile has no associated BFD.  */
 528
 529 extern struct objfile *rt_common_objfile;
 530
 531 /* When we need to allocate a new type, we need to know which type_obstack
 532    to allocate the type on, since there is one for each objfile.  The places
 533    where types are allocated are deeply buried in function call hierarchies
 534    which know nothing about objfiles, so rather than trying to pass a
 535    particular objfile down to them, we just do an end run around them and
 536    set current_objfile to be whatever objfile we expect to be using at the
 537    time types are being allocated.  For instance, when we start reading
 538    symbols for a particular objfile, we set current_objfile to point to that
 539    objfile, and when we are done, we set it back to NULL, to ensure that we
 540    never put a type someplace other than where we are expecting to put it.
 541    FIXME:  Maybe we should review the entire type handling system and
 542    see if there is a better way to avoid this problem. */
 543
 544 extern struct objfile *current_objfile;
 545
 546 /* All known objfiles are kept in a linked list.  This points to the
 547    root of this list. */
 548
 549 extern struct objfile *object_files;
 550
 551 /* Declarations for functions defined in objfiles.c */
 552
 553 extern struct objfile *allocate_objfile (bfd *, int);
 554
 555 extern int build_objfile_section_table (struct objfile *);
 556
 557 extern void terminate_minimal_symbol_table (struct objfile *objfile);
 558
 559 extern void put_objfile_before (struct objfile *, struct objfile *);
 560
 561 extern void objfile_to_front (struct objfile *);
 562
 563 extern void unlink_objfile (struct objfile *);
 564
 565 extern void free_objfile (struct objfile *);
 566
 567 extern struct cleanup *make_cleanup_free_objfile (struct objfile *);
 568
 569 extern void free_all_objfiles (void);
 570
 571 extern void objfile_relocate (struct objfile *, struct section_offsets *);
 572
 573 extern int have_partial_symbols (void);
 574
 575 extern int have_full_symbols (void);
 576
 577 /* This operation deletes all objfile entries that represent solibs that
 578    weren't explicitly loaded by the user, via e.g., the add-symbol-file
 579    command.
 580  */
 581 extern void objfile_purge_solibs (void);
 582
 583 /* Functions for dealing with the minimal symbol table, really a misc
 584    address<->symbol mapping for things we don't have debug symbols for.  */
 585
 586 extern int have_minimal_symbols (void);
 587
 588 extern struct obj_section *find_pc_section (CORE_ADDR pc);
 589
 590 extern struct obj_section *find_pc_sect_section (CORE_ADDR pc,
 591                                                  asection * section);
 592
 593 extern int in_plt_section (CORE_ADDR, char *);
 594
 595 extern int is_in_import_list (char *, struct objfile *);
 596
 597 /* Keep a registry of per-objfile data-pointers required by other GDB
 598    modules.  */
 599
 600 extern const struct objfile_data *register_objfile_data (void);
 601 extern void set_objfile_data (struct objfile *objfile,
 602                               const struct objfile_data *data, void *value);
 603 extern void *objfile_data (struct objfile *objfile,
 604                            const struct objfile_data *data);
 605 \f
 606
 607 /* Traverse all object files.  ALL_OBJFILES_SAFE works even if you delete
 608    the objfile during the traversal.  */
 609
 610 #define ALL_OBJFILES(obj) \
 611   for ((obj) = object_files; (obj) != NULL; (obj) = (obj)->next)
 612
 613 #define ALL_OBJFILES_SAFE(obj,nxt) \
 614   for ((obj) = object_files;       \
 615        (obj) != NULL? ((nxt)=(obj)->next,1) :0; \
 616        (obj) = (nxt))
 617
 618 /* Traverse all symtabs in one objfile.  */
 619
 620 #define ALL_OBJFILE_SYMTABS(objfile, s) \
 621     for ((s) = (objfile) -> symtabs; (s) != NULL; (s) = (s) -> next)
 622
 623 /* Traverse all psymtabs in one objfile.  */
 624
 625 #define ALL_OBJFILE_PSYMTABS(objfile, p) \
 626     for ((p) = (objfile) -> psymtabs; (p) != NULL; (p) = (p) -> next)
 627
 628 /* Traverse all minimal symbols in one objfile.  */
 629
 630 #define ALL_OBJFILE_MSYMBOLS(objfile, m) \
 631     for ((m) = (objfile) -> msymbols; DEPRECATED_SYMBOL_NAME(m) != NULL; (m)++)
 632
 633 /* Traverse all symtabs in all objfiles.  */
 634
 635 #define ALL_SYMTABS(objfile, s) \
 636   ALL_OBJFILES (objfile)         \
 637     ALL_OBJFILE_SYMTABS (objfile, s)
 638
 639 /* Traverse all psymtabs in all objfiles.  */
 640
 641 #define ALL_PSYMTABS(objfile, p) \
 642   ALL_OBJFILES (objfile)         \
 643     ALL_OBJFILE_PSYMTABS (objfile, p)
 644
 645 /* Traverse all minimal symbols in all objfiles.  */
 646
 647 #define ALL_MSYMBOLS(objfile, m) \
 648   ALL_OBJFILES (objfile)         \
 649     ALL_OBJFILE_MSYMBOLS (objfile, m)
 650
 651 #define ALL_OBJFILE_OSECTIONS(objfile, osect)   \
 652   for (osect = objfile->sections; osect < objfile->sections_end; osect++)
 653
 654 #define ALL_OBJSECTIONS(objfile, osect)         \
 655   ALL_OBJFILES (objfile)                        \
 656     ALL_OBJFILE_OSECTIONS (objfile, osect)
 657
 658 #define SECT_OFF_DATA(objfile) \
 659      ((objfile->sect_index_data == -1) \
 660       ? (internal_error (__FILE__, __LINE__, "sect_index_data not initialized"), -1) \
 661       : objfile->sect_index_data)
 662
 663 #define SECT_OFF_RODATA(objfile) \
 664      ((objfile->sect_index_rodata == -1) \
 665       ? (internal_error (__FILE__, __LINE__, "sect_index_rodata not initialized"), -1) \
 666       : objfile->sect_index_rodata)
 667
 668 #define SECT_OFF_TEXT(objfile) \
 669      ((objfile->sect_index_text == -1) \
 670       ? (internal_error (__FILE__, __LINE__, "sect_index_text not initialized"), -1) \
 671       : objfile->sect_index_text)
 672
 673 /* Sometimes the .bss section is missing from the objfile, so we don't
 674    want to die here. Let the users of SECT_OFF_BSS deal with an
 675    uninitialized section index. */
 676 #define SECT_OFF_BSS(objfile) (objfile)->sect_index_bss
 677
 678 #endif /* !defined (OBJFILES_H) */