gdb/symtab.h

   1 /* Symbol table definitions for GDB.
   2    Copyright (C) 1986, 1989, 1991, 1992 Free Software Foundation, Inc.
   3
   4 This file is part of GDB.
   5
   6 This program is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2 of the License, or
   9 (at your option) any later version.
  10
  11 This program is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with this program; if not, write to the Free Software
  18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
  19
  20 #if !defined (SYMTAB_H)
  21 #define SYMTAB_H 1
  22 #include "obstack.h"
  23
  24 /* See the comment in symfile.c about how current_objfile is used. */
  25
  26 extern struct objfile *current_objfile;
  27
  28 /* Some definitions and declarations to go with use of obstacks.  */
  29 #define obstack_chunk_alloc xmalloc
  30 #define obstack_chunk_free free
  31
  32 /* Some macros for char-based bitfields.  */
  33 #define B_SET(a,x) (a[x>>3] |= (1 << (x&7)))
  34 #define B_CLR(a,x) (a[x>>3] &= ~(1 << (x&7)))
  35 #define B_TST(a,x) (a[x>>3] & (1 << (x&7)))
  36 #define B_TYPE          unsigned char
  37 #define B_BYTES(x)      ( 1 + ((x)>>3) )
  38 #define B_CLRALL(a,x) bzero (a, B_BYTES(x))
  39
  40
  41 /* Define a simple structure used to hold some very basic information about
  42    all defined global symbols (text, data, bss, abs, etc).  The only two
  43    required pieces of information are the symbol's name and the address
  44    associated with that symbol.  In many cases, even if a file was compiled
  45    with no special options for debugging at all, as long as was not stripped
  46    it will contain sufficient information to build a useful minimal symbol
  47    table using this structure.  Even when a file contains enough debugging
  48    information to build a full symbol table, these minimal symbols are still
  49    useful for quickly mapping between names and addresses, and vice versa.
  50    They are also sometimes used to figure out what full symbol table entries
  51    need to be read in. */
  52
  53 struct minimal_symbol
  54 {
  55
  56   /* Name of the symbol.  This is a required field.  Storage for the name is
  57      allocated on the symbol_obstack for the associated objfile. */
  58
  59   char *name;
  60
  61   /* Address of the symbol.  This is a required field. */
  62
  63   CORE_ADDR address;
  64
  65   /* The info field is available for caching machine-specific information that
  66      The AMD 29000 tdep.c uses it to remember things it has decoded from the
  67      instructions in the function header, so it doesn't have to rederive the
  68      info constantly (over a serial line).  It is initialized to zero and
  69      stays that way until target-dependent code sets it.  Storage for any data
  70      pointed to by this field should be allocated on the symbol_obstack for
  71      the associated objfile.  The type would be "void *" except for reasons
  72      of compatibility with older compilers.  This field is optional. */
  73
  74   char *info;
  75
  76   /* Classification types for this symbol.  These should be taken as "advisory
  77      only", since if gdb can't easily figure out a classification it simply
  78      selects mst_unknown.  It may also have to guess when it can't figure out
  79      which is a better match between two types (mst_data versus mst_bss) for
  80      example.  Since the minimal symbol info is sometimes derived from the
  81      BFD library's view of a file, we need to live with what information bfd
  82      supplies. */
  83
  84   enum minimal_symbol_type
  85     {
  86       mst_unknown = 0,          /* Unknown type, the default */
  87       mst_text,                 /* Generally executable instructions */
  88       mst_data,                 /* Generally initialized data */
  89       mst_bss,                  /* Generally uninitialized data */
  90       mst_abs                   /* Generally absolute (nonrelocatable) */
  91     } type;
  92
  93 };
  94
  95 \f
  96 /* All of the name-scope contours of the program
  97    are represented by `struct block' objects.
  98    All of these objects are pointed to by the blockvector.
  99
 100    Each block represents one name scope.
 101    Each lexical context has its own block.
 102
 103    The first two blocks in the blockvector are special.
 104    The first one contains all the symbols defined in this compilation
 105    whose scope is the entire program linked together.
 106    The second one contains all the symbols whose scope is the
 107    entire compilation excluding other separate compilations.
 108    In C, these correspond to global symbols and static symbols.
 109
 110    Each block records a range of core addresses for the code that
 111    is in the scope of the block.  The first two special blocks
 112    give, for the range of code, the entire range of code produced
 113    by the compilation that the symbol segment belongs to.
 114
 115    The blocks appear in the blockvector
 116    in order of increasing starting-address,
 117    and, within that, in order of decreasing ending-address.
 118
 119    This implies that within the body of one function
 120    the blocks appear in the order of a depth-first tree walk.  */
 121
 122 struct blockvector
 123 {
 124   /* Number of blocks in the list.  */
 125   int nblocks;
 126   /* The blocks themselves.  */
 127   struct block *block[1];
 128 };
 129
 130 /* Special block numbers */
 131 #define GLOBAL_BLOCK    0
 132 #define STATIC_BLOCK    1
 133 #define FIRST_LOCAL_BLOCK       2
 134
 135 struct block
 136 {
 137   /* Addresses in the executable code that are in this block.
 138      Note: in an unrelocated symbol segment in a file,
 139      these are always zero.  They can be filled in from the
 140      N_LBRAC and N_RBRAC symbols in the loader symbol table.  */
 141   CORE_ADDR startaddr, endaddr;
 142   /* The symbol that names this block,
 143      if the block is the body of a function;
 144      otherwise, zero.
 145      Note: In an unrelocated symbol segment in an object file,
 146      this field may be zero even when the block has a name.
 147      That is because the block is output before the name
 148      (since the name resides in a higher block).
 149      Since the symbol does point to the block (as its value),
 150      it is possible to find the block and set its name properly.  */
 151   struct symbol *function;
 152   /* The `struct block' for the containing block, or 0 if none.  */
 153   /* Note that in an unrelocated symbol segment in an object file
 154      this pointer may be zero when the correct value should be
 155      the second special block (for symbols whose scope is one compilation).
 156      This is because the compiler ouptuts the special blocks at the
 157      very end, after the other blocks.   */
 158   struct block *superblock;
 159   /* A flag indicating whether or not the fucntion corresponding
 160      to this block was compiled with gcc or not.  If there is no
 161      function corresponding to this block, this meaning of this flag
 162      is undefined.  (In practice it will be 1 if the block was created
 163      while processing a file compiled with gcc and 0 when not). */
 164   unsigned char gcc_compile_flag;
 165   /* Number of local symbols.  */
 166   int nsyms;
 167   /* The symbols.  */
 168   struct symbol *sym[1];
 169 };
 170 \f
 171 /* Represent one symbol name; a variable, constant, function or typedef.  */
 172
 173 /* Different name spaces for symbols.  Looking up a symbol specifies
 174    a namespace and ignores symbol definitions in other name spaces.
 175
 176    VAR_NAMESPACE is the usual namespace.
 177    In C, this contains variables, function names, typedef names
 178    and enum type values.
 179
 180    STRUCT_NAMESPACE is used in C to hold struct, union and enum type names.
 181    Thus, if `struct foo' is used in a C program,
 182    it produces a symbol named `foo' in the STRUCT_NAMESPACE.
 183
 184    LABEL_NAMESPACE may be used for names of labels (for gotos);
 185    currently it is not used and labels are not recorded at all.  */
 186
 187 /* For a non-global symbol allocated statically,
 188    the correct core address cannot be determined by the compiler.
 189    The compiler puts an index number into the symbol's value field.
 190    This index number can be matched with the "desc" field of
 191    an entry in the loader symbol table.  */
 192
 193 enum namespace
 194 {
 195   UNDEF_NAMESPACE, VAR_NAMESPACE, STRUCT_NAMESPACE, LABEL_NAMESPACE
 196 };
 197
 198 /* An address-class says where to find the value of a symbol.  */
 199
 200 enum address_class
 201 {
 202   LOC_UNDEF,            /* Not used; catches errors */
 203   LOC_CONST,            /* Value is constant int SYMBOL_VALUE, host byteorder */
 204   LOC_STATIC,           /* Value is at fixed address SYMBOL_VALUE_ADDRESS */
 205   LOC_REGISTER,         /* Value is in register */
 206   LOC_ARG,              /* Value is at spec'd offset in arglist */
 207   LOC_REF_ARG,          /* Value address is at spec'd offset in arglist. */
 208   LOC_REGPARM,          /* Value is at spec'd offset in register window */
 209   LOC_LOCAL,            /* Value is at spec'd offset in stack frame */
 210   LOC_TYPEDEF,          /* Value not used; definition in SYMBOL_TYPE
 211                            Symbols in the namespace STRUCT_NAMESPACE
 212                            all have this class.  */
 213   LOC_LABEL,            /* Value is address SYMBOL_VALUE_ADDRESS in the code */
 214   LOC_BLOCK,            /* Value is address SYMBOL_VALUE_BLOCK of a
 215                            `struct block'.  Function names have this class. */
 216   LOC_CONST_BYTES,      /* Value is a constant byte-sequence pointed to by
 217                            SYMBOL_VALUE_ADDRESS, in target byte order.  */
 218   LOC_LOCAL_ARG         /* Value is arg at spec'd offset in stack frame.
 219                            Differs from LOC_LOCAL in that symbol is an
 220                            argument; differs from LOC_ARG in that we find it
 221                            in the frame (FRAME_LOCALS_ADDRESS), not in the
 222                            arglist (FRAME_ARGS_ADDRESS).  Added for i960,
 223                            which passes args in regs then copies to frame.  */
 224 };
 225
 226 struct symbol
 227 {
 228   /* Symbol name */
 229   char *name;
 230   /* Name space code.  */
 231   enum namespace namespace;
 232   /* Address class */
 233   enum address_class class;
 234   /* Data type of value */
 235   struct type *type;
 236
 237   /* Line number of definition.  */
 238   unsigned short line;
 239
 240   /* constant value, or address if static, or register number,
 241      or offset in arguments, or offset in stack frame.  All of
 242      these are in host byte order (though what they point to might
 243      be in target byte order, e.g. LOC_CONST_BYTES).  */
 244   union
 245     {
 246       long value;               /* for LOC_CONST, LOC_REGISTER, LOC_ARG,
 247                                    LOC_REF_ARG, LOC_REGPARM, LOC_LOCAL */
 248       struct block *block;      /* for LOC_BLOCK */
 249       char *bytes;              /* for LOC_CONST_BYTES */
 250       CORE_ADDR address;        /* for LOC_STATIC, LOC_LABEL */
 251       struct symbol *chain;     /* for opaque typedef struct chain */
 252     }
 253   value;
 254 };
 255
 256
 257 /* A partial_symbol records the name, namespace, and address class of
 258    symbols whose types we have not parsed yet.  For functions, it also
 259    contains their memory address, so we can find them from a PC value.
 260    Each partial_symbol sits in a partial_symtab, all of which are chained
 261    on a  partial symtab list and which points to the corresponding
 262    normal symtab once the partial_symtab has been referenced.  */
 263
 264 struct partial_symbol
 265 {
 266   /* Symbol name */
 267   char *name;
 268   /* Name space code.  */
 269   enum namespace namespace;
 270   /* Address class (for info_symbols) */
 271   enum address_class class;
 272   /* Value (only used for static functions currently).  Done this
 273      way so that we can use the struct symbol macros.
 274      Note that the address of a function is SYMBOL_VALUE_ADDRESS (pst)
 275      in a partial symbol table, but BLOCK_START (SYMBOL_BLOCK_VALUE (st))
 276      in a symbol table.  */
 277   union
 278     {
 279       long value;
 280       CORE_ADDR address;
 281     }
 282   value;
 283 };
 284 \f
 285 /* Source-file information.
 286    This describes the relation between source files and line numbers
 287    and addresses in the program text.  */
 288
 289 struct sourcevector
 290 {
 291   int length;                   /* Number of source files described */
 292   struct source *source[1];     /* Descriptions of the files */
 293 };
 294
 295 /* Each item represents a line-->pc (or the reverse) mapping.  This is
 296    somewhat more wasteful of space than one might wish, but since only
 297    the files which are actually debugged are read in to core, we don't
 298    waste much space.
 299
 300    Each item used to be an int; either minus a line number, or a
 301    program counter.  If it represents a line number, that is the line
 302    described by the next program counter value.  If it is positive, it
 303    is the program counter at which the code for the next line starts.  */
 304
 305 struct linetable_entry
 306 {
 307   int line;
 308   CORE_ADDR pc;
 309 };
 310
 311 struct linetable
 312 {
 313   int nitems;
 314   struct linetable_entry item[1];
 315 };
 316
 317 /* All the information on one source file.  */
 318
 319 struct source
 320 {
 321   char *name;                   /* Name of file */
 322   struct linetable contents;
 323 };
 324
 325 /* Each source file is represented by a struct symtab.
 326    These objects are chained through the `next' field.  */
 327
 328 struct symtab
 329   {
 330     /* Chain of all existing symtabs.  */
 331     struct symtab *next;
 332     /* List of all symbol scope blocks for this symtab.  */
 333     struct blockvector *blockvector;
 334     /* Table mapping core addresses to line numbers for this file.
 335        Can be NULL if none.  */
 336     struct linetable *linetable;
 337     /* Name of this source file.  */
 338     char *filename;
 339     /* Directory in which it was compiled, or NULL if we don't know.  */
 340     char *dirname;
 341     /* This component says how to free the data we point to:
 342        free_contents => do a tree walk and free each object.
 343        free_nothing => do nothing; some other symtab will free
 344          the data this one uses.
 345        free_linetable => free just the linetable.  */
 346     enum free_code {free_nothing, free_contents, free_linetable}
 347       free_code;
 348     /* Pointer to one block of storage to be freed, if nonzero.  */
 349     /* This is IN ADDITION to the action indicated by free_code.  */
 350     char *free_ptr;
 351     /* Total number of lines found in source file.  */
 352     int nlines;
 353     /* Array mapping line number to character position.  */
 354     int *line_charpos;
 355     /* Language of this source file.  */
 356     enum language language;
 357     /* String of version information.  May be zero.  */
 358     char *version;
 359     /* Full name of file as found by searching the source path.
 360        0 if not yet known.  */
 361     char *fullname;
 362
 363     /* Object file from which this symbol information was read.  */
 364     struct objfile *objfile;
 365
 366     /* Anything extra for this symtab.  This is for target machines
 367        with special debugging info of some sort (which cannot just
 368        be represented in a normal symtab).  */
 369 #if defined (EXTRA_SYMTAB_INFO)
 370     EXTRA_SYMTAB_INFO
 371 #endif
 372   };
 373
 374 /* Each source file that has not been fully read in is represented by
 375    a partial_symtab.  This contains the information on where in the
 376    executable the debugging symbols for a specific file are, and a
 377    list of names of global symbols which are located in this file.
 378    They are all chained on partial symtab lists.
 379
 380    Even after the source file has been read into a symtab, the
 381    partial_symtab remains around.  They are allocated on an obstack,
 382    psymbol_obstack.  FIXME, this is bad for dynamic linking or VxWorks-
 383    style execution of a bunch of .o's.  */
 384
 385 struct partial_symtab
 386 {
 387   /* Chain of all existing partial symtabs.  */
 388   struct partial_symtab *next;
 389   /* Name of the source file which this partial_symtab defines */
 390   char *filename;
 391
 392   /* Information about the object file from which symbols should be read.  */
 393   struct objfile *objfile;
 394
 395   /* Address relative to which the symbols in this file are.  Need to
 396      relocate by this amount when reading in symbols from the symbol
 397      file.  */
 398   CORE_ADDR addr;
 399   /* Range of text addresses covered by this file; texthigh is the
 400      beginning of the next section. */
 401   CORE_ADDR textlow, texthigh;
 402   /* Array of pointers to all of the partial_symtab's which this one
 403      depends on.  Since this array can only be set to previous or
 404      the current (?) psymtab, this dependency tree is guaranteed not
 405      to have any loops. */
 406   struct partial_symtab **dependencies;
 407   int number_of_dependencies;
 408   /* Global symbol list.  This list will be sorted after readin to
 409      improve access.  Binary search will be the usual method of
 410      finding a symbol within it. globals_offset is an integer offset
 411      within global_psymbols[].  */
 412   int globals_offset, n_global_syms;
 413   /* Static symbol list.  This list will *not* be sorted after readin;
 414      to find a symbol in it, exhaustive search must be used.  This is
 415      reasonable because searches through this list will eventually
 416      lead to either the read in of a files symbols for real (assumed
 417      to take a *lot* of time; check) or an error (and we don't care
 418      how long errors take).  This is an offset and size within
 419      static_psymbols[].  */
 420   int statics_offset, n_static_syms;
 421   /* Pointer to symtab eventually allocated for this source file, 0 if
 422      !readin or if we haven't looked for the symtab after it was readin.  */
 423   struct symtab *symtab;
 424   /* Pointer to function which will read in the symtab corresponding to
 425      this psymtab.  */
 426   void (*read_symtab) PARAMS ((struct partial_symtab *));
 427   /* Information that lets read_symtab() locate the part of the symbol table
 428      that this psymtab corresponds to.  This information is private to the
 429      format-dependent symbol reading routines.  For further detail examine
 430      the various symbol reading modules.  Should really be (void *) but is
 431      (char *) as with other such gdb variables.  (FIXME) */
 432   char *read_symtab_private;
 433   /* Non-zero if the symtab corresponding to this psymtab has been
 434      readin */
 435   unsigned char readin;
 436 };
 437
 438 /* A fast way to get from a psymtab to its symtab (after the first time).  */
 439 #define PSYMTAB_TO_SYMTAB(pst)  ((pst)->symtab?                 \
 440                                  (pst)->symtab:                 \
 441                                  psymtab_to_symtab (pst) )
 442
 443 /* This symtab variable specifies the current file for printing source lines */
 444
 445 struct symtab *current_source_symtab;
 446
 447 /* This is the next line to print for listing source lines.  */
 448
 449 int current_source_line;
 450
 451 #define BLOCKVECTOR(symtab) (symtab)->blockvector
 452
 453 #define LINETABLE(symtab) (symtab)->linetable
 454 \f
 455 /* Macros normally used to access components of symbol table structures.  */
 456
 457 #define BLOCKVECTOR_NBLOCKS(blocklist) (blocklist)->nblocks
 458 #define BLOCKVECTOR_BLOCK(blocklist,n) (blocklist)->block[n]
 459
 460 #define BLOCK_START(bl) (bl)->startaddr
 461 #define BLOCK_END(bl) (bl)->endaddr
 462 #define BLOCK_NSYMS(bl) (bl)->nsyms
 463 #define BLOCK_SYM(bl, n) (bl)->sym[n]
 464 #define BLOCK_FUNCTION(bl) (bl)->function
 465 #define BLOCK_SUPERBLOCK(bl) (bl)->superblock
 466 #define BLOCK_GCC_COMPILED(bl) (bl)->gcc_compile_flag
 467
 468 /* Nonzero if symbols of block BL should be sorted alphabetically.  */
 469 #define BLOCK_SHOULD_SORT(bl) ((bl)->nsyms >= 40)
 470
 471 #define SYMBOL_NAME(symbol) (symbol)->name
 472 #define SYMBOL_NAMESPACE(symbol) (symbol)->namespace
 473 #define SYMBOL_CLASS(symbol) (symbol)->class
 474 #define SYMBOL_VALUE(symbol) (symbol)->value.value
 475 #define SYMBOL_VALUE_ADDRESS(symbol) (symbol)->value.address
 476 #define SYMBOL_VALUE_BYTES(symbol) (symbol)->value.bytes
 477 #define SYMBOL_BLOCK_VALUE(symbol) (symbol)->value.block
 478 #define SYMBOL_VALUE_CHAIN(symbol) (symbol)->value.chain
 479 #define SYMBOL_TYPE(symbol) (symbol)->type
 480 #define SYMBOL_LINE(symbol) (symbol)->line
 481
 482 /* The virtual function table is now an array of structures
 483    which have the form { int16 offset, delta; void *pfn; }.
 484
 485    In normal virtual function tables, OFFSET is unused.
 486    DELTA is the amount which is added to the apparent object's base
 487    address in order to point to the actual object to which the
 488    virtual function should be applied.
 489    PFN is a pointer to the virtual function.  */
 490
 491 #define VTBL_FNADDR_OFFSET 2
 492
 493 /* Macro that yields non-zero value iff NAME is the prefix
 494    for C++ operator names.  If you leave out the parenthesis
 495    here you will lose!
 496
 497    Currently 'o' 'p' CPLUS_MARKER is used for both the symbol in the
 498    symbol-file and the names in gdb's symbol table.  */
 499 #define OPNAME_PREFIX_P(NAME) ((NAME)[0] == 'o' && (NAME)[1] == 'p' \
 500                                && (NAME)[2] == CPLUS_MARKER)
 501
 502 #define VTBL_PREFIX_P(NAME) ((NAME)[3] == CPLUS_MARKER  \
 503                              && !strncmp ((NAME), "_vt", 3))
 504 \f
 505 /* Functions that work on the objects described above */
 506
 507 extern struct symtab *
 508 lookup_symtab PARAMS ((char *));
 509
 510 extern struct symbol *
 511 lookup_symbol PARAMS ((const char *, const struct block *,
 512                        const enum namespace, int *, struct symtab **));
 513
 514 extern struct symbol *
 515 lookup_block_symbol PARAMS ((const struct block *, const char *,
 516                              const enum namespace));
 517
 518 extern struct type *
 519 lookup_struct PARAMS ((char *, struct block *));
 520
 521 extern struct type *
 522 lookup_union PARAMS ((char *, struct block *));
 523
 524 extern struct type *
 525 lookup_enum PARAMS ((char *, struct block *));
 526
 527 extern struct symbol *
 528 block_function PARAMS ((struct block *));
 529
 530 extern struct symbol *
 531 find_pc_function PARAMS ((CORE_ADDR));
 532
 533 extern int
 534 find_pc_partial_function PARAMS ((CORE_ADDR, char **, CORE_ADDR *));
 535
 536 extern void
 537 clear_pc_function_cache PARAMS ((void));
 538
 539 extern struct partial_symtab *
 540 lookup_partial_symtab PARAMS ((char *));
 541
 542 extern struct partial_symtab *
 543 find_pc_psymtab PARAMS ((CORE_ADDR));
 544
 545 extern struct symtab *
 546 find_pc_symtab PARAMS ((CORE_ADDR));
 547
 548 extern struct partial_symbol *
 549 find_pc_psymbol PARAMS ((struct partial_symtab *, CORE_ADDR));
 550
 551 extern int
 552 find_pc_line_pc_range PARAMS ((CORE_ADDR, CORE_ADDR *, CORE_ADDR *));
 553
 554 extern int
 555 contained_in PARAMS ((struct block *, struct block *));
 556
 557 extern void
 558 reread_symbols PARAMS ((void));
 559
 560 extern int
 561 have_partial_symbols PARAMS ((void));
 562
 563 extern int
 564 have_full_symbols PARAMS ((void));
 565
 566 /* Functions for dealing with the minimal symbol table, really a misc
 567    address<->symbol mapping for things we don't have debug symbols for.  */
 568
 569 extern int
 570 have_minimal_symbols PARAMS ((void));
 571
 572 extern void
 573 prim_record_minimal_symbol PARAMS ((const char *, CORE_ADDR,
 574                                     enum minimal_symbol_type));
 575
 576 extern struct minimal_symbol *
 577 lookup_minimal_symbol PARAMS ((const char *, struct objfile *));
 578
 579 extern struct minimal_symbol *
 580 lookup_minimal_symbol_by_pc PARAMS ((CORE_ADDR));
 581
 582 extern PTR
 583 iterate_over_msymbols PARAMS ((PTR (*func) (struct objfile *,
 584                                             struct minimal_symbol *,
 585                                             PTR, PTR, PTR),
 586                                PTR, PTR, PTR));
 587
 588 extern void
 589 init_minimal_symbol_collection PARAMS ((void));
 590
 591 extern void
 592 discard_minimal_symbols PARAMS ((int));
 593
 594 extern void
 595 install_minimal_symbols PARAMS ((struct objfile *));
 596
 597 struct symtab_and_line
 598 {
 599   struct symtab *symtab;
 600   int line;
 601   CORE_ADDR pc;
 602   CORE_ADDR end;
 603 };
 604
 605 struct symtabs_and_lines
 606 {
 607   struct symtab_and_line *sals;
 608   int nelts;
 609 };
 610
 611 /* Given a pc value, return line number it is in.
 612    Second arg nonzero means if pc is on the boundary
 613    use the previous statement's line number.  */
 614
 615 extern struct symtab_and_line
 616 find_pc_line PARAMS ((CORE_ADDR, int));
 617
 618 /* Given a symtab and line number, return the pc there.  */
 619
 620 extern CORE_ADDR
 621 find_line_pc PARAMS ((struct symtab *, int));
 622
 623 extern int
 624 find_line_pc_range PARAMS ((struct symtab *, int, CORE_ADDR *, CORE_ADDR *));
 625
 626 extern void
 627 resolve_sal_pc PARAMS ((struct symtab_and_line *));
 628
 629 /* Given a string, return the line specified by it.
 630    For commands like "list" and "breakpoint".  */
 631
 632 extern struct symtabs_and_lines
 633 decode_line_spec PARAMS ((char *, int));
 634
 635 extern struct symtabs_and_lines
 636 decode_line_spec_1 PARAMS ((char *, int));
 637
 638 extern struct symtabs_and_lines
 639 decode_line_1 PARAMS ((char **, int, struct symtab *, int));
 640
 641 /* Symmisc.c */
 642
 643 extern void
 644 free_symtab PARAMS ((struct symtab *));
 645
 646 /* Symbol-reading stuff in symfile.c and solib.c.  */
 647
 648 extern struct symtab *
 649 psymtab_to_symtab PARAMS ((struct partial_symtab *));
 650
 651 extern void
 652 clear_solib PARAMS ((void));
 653
 654 extern struct objfile *
 655 symbol_file_add PARAMS ((char *, int, CORE_ADDR, int, int, int));
 656
 657 /* source.c */
 658
 659 extern int
 660 identify_source_line PARAMS ((struct symtab *, int, int));
 661
 662 extern void
 663 print_source_lines PARAMS ((struct symtab *, int, int, int));
 664
 665 extern void
 666 forget_cached_source_info PARAMS ((void));
 667
 668 extern void
 669 select_source_symtab PARAMS ((struct symtab *));
 670
 671 extern char **
 672 make_symbol_completion_list PARAMS ((char *));
 673
 674 /* symtab.c */
 675
 676 extern struct partial_symtab *
 677 find_main_psymtab PARAMS ((void));
 678
 679 /* blockframe.c */
 680
 681 extern struct blockvector *
 682 blockvector_for_pc PARAMS ((CORE_ADDR, int *));
 683
 684 /* symfile.c */
 685
 686 extern enum language
 687 deduce_language_from_filename PARAMS ((char *));
 688
 689 #endif /* !defined(SYMTAB_H) */