gdb/defs.h

   1 /* Basic, host-specific, and target-specific definitions for GDB.
   2    Copyright (C) 1986, 1989, 1991 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 (DEFS_H)
  21 #define DEFS_H 1
  22
  23 #include <stdio.h>
  24
  25 /* First include ansidecl.h so we can use the various macro definitions
  26    here and in all subsequent file inclusions.  */
  27
  28 #include "ansidecl.h"
  29
  30 /* An address in the program being debugged.  Host byte order.  */
  31 typedef unsigned int CORE_ADDR;
  32
  33 #define min(a, b) ((a) < (b) ? (a) : (b))
  34 #define max(a, b) ((a) > (b) ? (a) : (b))
  35
  36 /* Gdb does *lots* of string compares.  Use macros to speed them up by
  37    avoiding function calls if the first characters are not the same. */
  38
  39 #define STRCMP(a,b) (*(a) == *(b) ? strcmp ((a), (b)) : (int)*(a) - (int)*(b))
  40 #define STREQ(a,b) (*(a) == *(b) ? !strcmp ((a), (b)) : 0)
  41 #define STREQN(a,b,c) (*(a) == *(b) ? !strncmp ((a), (b), (c)) : 0)
  42
  43 /* The character GNU C++ uses to build identifiers that must be unique from
  44    the program's identifiers (such as $this and $$vptr).  */
  45 #define CPLUS_MARKER '$'        /* May be overridden to '.' for SysV */
  46
  47 #include <errno.h>              /* System call error return status */
  48
  49 extern int quit_flag;
  50 extern int immediate_quit;
  51 extern int sevenbit_strings;
  52
  53 extern void
  54 quit PARAMS ((void));
  55
  56 #define QUIT { if (quit_flag) quit (); }
  57
  58 /* Command classes are top-level categories into which commands are broken
  59    down for "help" purposes.
  60    Notes on classes: class_alias is for alias commands which are not
  61    abbreviations of the original command.  class-pseudo is for commands
  62    which are not really commands nor help topics ("stop").  */
  63
  64 enum command_class
  65 {
  66   /* Special args to help_list */
  67   all_classes = -2, all_commands = -1,
  68   /* Classes of commands */
  69   no_class = -1, class_run = 0, class_vars, class_stack,
  70   class_files, class_support, class_info, class_breakpoint,
  71   class_alias, class_obscure, class_user, class_maintenance,
  72   class_pseudo
  73 };
  74
  75 /* Languages represented in the symbol table and elsewhere.
  76    This should probably be in language.h, but since enum's can't
  77    be forward declared to satisfy opaque references before their
  78    actual definition, needs to be here. */
  79
  80 enum language
  81 {
  82    language_unknown,            /* Language not known */
  83    language_auto,               /* Placeholder for automatic setting */
  84    language_c,                  /* C */
  85    language_cplus,              /* C++ */
  86    language_chill,              /* Chill */
  87    language_m2                  /* Modula-2 */
  88 };
  89
  90 /* the cleanup list records things that have to be undone
  91    if an error happens (descriptors to be closed, memory to be freed, etc.)
  92    Each link in the chain records a function to call and an
  93    argument to give it.
  94
  95    Use make_cleanup to add an element to the cleanup chain.
  96    Use do_cleanups to do all cleanup actions back to a given
  97    point in the chain.  Use discard_cleanups to remove cleanups
  98    from the chain back to a given point, not doing them.  */
  99
 100 struct cleanup
 101 {
 102   struct cleanup *next;
 103   void (*function) PARAMS ((PTR));
 104   PTR arg;
 105 };
 106
 107 /* From blockframe.c */
 108
 109 extern int
 110 inside_entry_func PARAMS ((CORE_ADDR));
 111
 112 extern int
 113 inside_entry_file PARAMS ((CORE_ADDR addr));
 114
 115 extern int
 116 inside_main_func PARAMS ((CORE_ADDR pc));
 117
 118 /* From ch-lang.c, for the moment. (FIXME) */
 119
 120 extern char *
 121 chill_demangle PARAMS ((const char *));
 122
 123 /* From libiberty.a */
 124
 125 extern char *
 126 cplus_demangle PARAMS ((const char *, int));
 127
 128 extern char *
 129 cplus_mangle_opname PARAMS ((char *, int));
 130
 131 /* From libmmalloc.a (memory mapped malloc library) */
 132
 133 extern PTR
 134 mmalloc_attach PARAMS ((int, PTR));
 135
 136 extern PTR
 137 mmalloc_detach PARAMS ((PTR));
 138
 139 extern PTR
 140 mmalloc PARAMS ((PTR, long));
 141
 142 extern PTR
 143 mrealloc PARAMS ((PTR, PTR, long));
 144
 145 extern void
 146 mfree PARAMS ((PTR, PTR));
 147
 148 extern int
 149 mmalloc_setkey PARAMS ((PTR, int, PTR));
 150
 151 extern PTR
 152 mmalloc_getkey PARAMS ((PTR, int));
 153
 154 /* From utils.c */
 155
 156 extern int
 157 strcmp_iw PARAMS ((const char *, const char *));
 158
 159 extern char *
 160 safe_strerror PARAMS ((int));
 161
 162 extern char *
 163 safe_strsignal PARAMS ((int));
 164
 165 extern void
 166 init_malloc PARAMS ((PTR));
 167
 168 extern void
 169 request_quit PARAMS ((int));
 170
 171 extern void
 172 do_cleanups PARAMS ((struct cleanup *));
 173
 174 extern void
 175 discard_cleanups PARAMS ((struct cleanup *));
 176
 177 /* The bare make_cleanup function is one of those rare beasts that
 178    takes almost any type of function as the first arg and anything that
 179    will fit in a "void *" as the second arg.
 180
 181    Should be, once all calls and called-functions are cleaned up:
 182 extern struct cleanup *
 183 make_cleanup PARAMS ((void (*function) (PTR), PTR));
 184
 185    Until then, lint and/or various type-checking compiler options will
 186    complain about make_cleanup calls.  It'd be wrong to just cast things,
 187    since the type actually passed when the function is called would be
 188    wrong.  */
 189
 190 extern struct cleanup *
 191 make_cleanup ();
 192
 193 extern struct cleanup *
 194 save_cleanups PARAMS ((void));
 195
 196 extern void
 197 restore_cleanups PARAMS ((struct cleanup *));
 198
 199 extern void
 200 free_current_contents PARAMS ((char **));
 201
 202 extern void
 203 null_cleanup PARAMS ((char **));
 204
 205 extern int
 206 myread PARAMS ((int, char *, int));
 207
 208 extern int
 209 query ();
 210
 211 extern void
 212 begin_line PARAMS ((void));
 213
 214 extern void
 215 wrap_here PARAMS ((char *));
 216
 217 extern void
 218 reinitialize_more_filter PARAMS ((void));
 219
 220 extern int
 221 print_insn PARAMS ((CORE_ADDR, FILE *));
 222
 223 extern void
 224 fputs_filtered PARAMS ((const char *, FILE *));
 225
 226 extern void
 227 puts_filtered PARAMS ((char *));
 228
 229 extern void
 230 vprintf_filtered ();
 231
 232 extern void
 233 vfprintf_filtered ();
 234
 235 extern void
 236 fprintf_filtered ();
 237
 238 extern void
 239 fprintfi_filtered ();
 240
 241 extern void
 242 printf_filtered ();
 243
 244 extern void
 245 printfi_filtered ();
 246
 247 extern void
 248 print_spaces PARAMS ((int, FILE *));
 249
 250 extern void
 251 print_spaces_filtered PARAMS ((int, FILE *));
 252
 253 extern char *
 254 n_spaces PARAMS ((int));
 255
 256 extern void
 257 gdb_printchar PARAMS ((int, FILE *, int));
 258
 259 extern void
 260 fprintf_symbol_filtered PARAMS ((FILE *, char *, enum language, int));
 261
 262 extern void
 263 perror_with_name PARAMS ((char *));
 264
 265 extern void
 266 print_sys_errmsg PARAMS ((char *, int));
 267
 268 /* From regex.c */
 269
 270 extern char *
 271 re_comp PARAMS ((char *));
 272
 273 /* From symfile.c */
 274
 275 extern void
 276 symbol_file_command PARAMS ((char *, int));
 277
 278 /* From main.c */
 279
 280 extern char *
 281 skip_quoted PARAMS ((char *));
 282
 283 extern char *
 284 gdb_readline PARAMS ((char *));
 285
 286 extern char *
 287 command_line_input PARAMS ((char *, int));
 288
 289 extern void
 290 print_prompt PARAMS ((void));
 291
 292 extern int
 293 batch_mode PARAMS ((void));
 294
 295 extern int
 296 input_from_terminal_p PARAMS ((void));
 297
 298 /* From printcmd.c */
 299
 300 extern void
 301 set_next_address PARAMS ((CORE_ADDR));
 302
 303 extern void
 304 print_address_symbolic PARAMS ((CORE_ADDR, FILE *, int, char *));
 305
 306 extern void
 307 print_address PARAMS ((CORE_ADDR, FILE *));
 308
 309 /* From source.c */
 310
 311 extern int
 312 openp PARAMS ((char *, int, char *, int, int, char **));
 313
 314 extern void
 315 mod_path PARAMS ((char *, char **));
 316
 317 extern void
 318 directory_command PARAMS ((char *, int));
 319
 320 extern void
 321 init_source_path PARAMS ((void));
 322
 323 /* From findvar.c */
 324
 325 extern int
 326 read_relative_register_raw_bytes PARAMS ((int, char *));
 327
 328 /* From readline (but not in any readline .h files).  */
 329
 330 extern char *
 331 tilde_expand PARAMS ((char *));
 332
 333 /* Structure for saved commands lines
 334    (for breakpoints, defined commands, etc).  */
 335
 336 struct command_line
 337 {
 338   struct command_line *next;
 339   char *line;
 340 };
 341
 342 extern struct command_line *
 343 read_command_lines PARAMS ((void));
 344
 345 extern void
 346 free_command_lines PARAMS ((struct command_line **));
 347
 348 /* String containing the current directory (what getwd would return).  */
 349
 350 extern char *current_directory;
 351
 352 /* Default radixes for input and output.  Only some values supported.  */
 353 extern unsigned input_radix;
 354 extern unsigned output_radix;
 355
 356 /* Baud rate specified for communication with serial target systems.  */
 357 extern char *baud_rate;
 358
 359 /* Possibilities for prettyprint parameters to routines which print
 360    things.  Like enum language, this should be in value.h, but needs
 361    to be here for the same reason.  FIXME:  If we can eliminate this
 362    as an arg to LA_VAL_PRINT, then we can probably move it back to
 363    value.h. */
 364
 365 enum val_prettyprint
 366 {
 367   Val_no_prettyprint = 0,
 368   Val_prettyprint,
 369   /* Use the default setting which the user has specified.  */
 370   Val_pretty_default
 371 };
 372
 373 \f
 374 /* Host machine definition.  This will be a symlink to one of the
 375    xm-*.h files, built by the `configure' script.  */
 376
 377 #include "xm.h"
 378
 379 /* Native machine support.  This will be a symlink to one of the
 380    nm-*.h files, built by the `configure' script.  */
 381
 382 #include "nm.h"
 383
 384 /* If the xm.h file did not define the mode string used to open the
 385    files, assume that binary files are opened the same way as text
 386    files */
 387 #ifndef FOPEN_RB
 388 #include "fopen-same.h"
 389 #endif
 390
 391 /*
 392  * Allow things in gdb to be declared "const".  If compiling ANSI, it
 393  * just works.  If compiling with gcc but non-ansi, redefine to __const__.
 394  * If non-ansi, non-gcc, then eliminate "const" entirely, making those
 395  * objects be read-write rather than read-only.
 396  */
 397
 398 #ifndef const
 399 #ifndef __STDC__
 400 # ifdef __GNUC__
 401 #  define const __const__
 402 # else
 403 #  define const /*nothing*/
 404 # endif /* GNUC */
 405 #endif /* STDC */
 406 #endif /* const */
 407
 408 #ifndef volatile
 409 #ifndef __STDC__
 410 # ifdef __GNUC__
 411 #  define volatile __volatile__
 412 # else
 413 #  define volatile /*nothing*/
 414 # endif /* GNUC */
 415 #endif /* STDC */
 416 #endif /* volatile */
 417
 418 /* Some compilers (many AT&T SVR4 compilers for instance), do not accept
 419    declarations of functions that never return (exit for instance) as
 420    "volatile void".  For such compilers "NORETURN" can be defined away
 421    to keep them happy */
 422
 423 #ifndef NORETURN
 424 # ifdef __lucid
 425 #   define NORETURN /*nothing*/
 426 # else
 427 #   define NORETURN volatile
 428 # endif
 429 #endif
 430
 431 /* Defaults for system-wide constants (if not defined by xm.h, we fake it).  */
 432
 433 #if !defined (UINT_MAX)
 434 #define UINT_MAX ((unsigned int)(~0))           /* 0xFFFFFFFF for 32-bits */
 435 #endif
 436
 437 #if !defined (INT_MAX)
 438 #define INT_MAX ((int)(UINT_MAX >> 1))          /* 0x7FFFFFFF for 32-bits */
 439 #endif
 440
 441 #if !defined (INT_MIN)
 442 #define INT_MIN (-INT_MAX - 1)                  /* 0x80000000 for 32-bits */
 443 #endif
 444
 445 #if !defined (ULONG_MAX)
 446 #define ULONG_MAX ((unsigned long)(~0L))        /* 0xFFFFFFFF for 32-bits */
 447 #endif
 448
 449 #if !defined (LONG_MAX)
 450 #define LONG_MAX ((long)(ULONG_MAX >> 1))       /* 0x7FFFFFFF for 32-bits */
 451 #endif
 452
 453 /* Number of bits in a char or unsigned char for the target machine.
 454    Just like CHAR_BIT in <limits.h> but describes the target machine.  */
 455 #if !defined (TARGET_CHAR_BIT)
 456 #define TARGET_CHAR_BIT 8
 457 #endif
 458
 459 /* Number of bits in a short or unsigned short for the target machine. */
 460 #if !defined (TARGET_SHORT_BIT)
 461 #define TARGET_SHORT_BIT (sizeof (short) * TARGET_CHAR_BIT)
 462 #endif
 463
 464 /* Number of bits in an int or unsigned int for the target machine. */
 465 #if !defined (TARGET_INT_BIT)
 466 #define TARGET_INT_BIT (sizeof (int) * TARGET_CHAR_BIT)
 467 #endif
 468
 469 /* Number of bits in a long or unsigned long for the target machine. */
 470 #if !defined (TARGET_LONG_BIT)
 471 #define TARGET_LONG_BIT (sizeof (long) * TARGET_CHAR_BIT)
 472 #endif
 473
 474 /* Number of bits in a long long or unsigned long long for the target machine. */
 475 #if !defined (TARGET_LONG_LONG_BIT)
 476 #define TARGET_LONG_LONG_BIT (2 * TARGET_LONG_BIT)
 477 #endif
 478
 479 /* Number of bits in a float for the target machine. */
 480 #if !defined (TARGET_FLOAT_BIT)
 481 #define TARGET_FLOAT_BIT (sizeof (float) * TARGET_CHAR_BIT)
 482 #endif
 483
 484 /* Number of bits in a double for the target machine. */
 485 #if !defined (TARGET_DOUBLE_BIT)
 486 #define TARGET_DOUBLE_BIT (sizeof (double) * TARGET_CHAR_BIT)
 487 #endif
 488
 489 /* Number of bits in a long double for the target machine. */
 490 #if !defined (TARGET_LONG_DOUBLE_BIT)
 491 #define TARGET_LONG_DOUBLE_BIT (2 * TARGET_DOUBLE_BIT)
 492 #endif
 493
 494 /* Number of bits in a "complex" for the target machine. */
 495 #if !defined (TARGET_COMPLEX_BIT)
 496 #define TARGET_COMPLEX_BIT (2 * TARGET_FLOAT_BIT)
 497 #endif
 498
 499 /* Number of bits in a "double complex" for the target machine. */
 500 #if !defined (TARGET_DOUBLE_COMPLEX_BIT)
 501 #define TARGET_DOUBLE_COMPLEX_BIT (2 * TARGET_DOUBLE_BIT)
 502 #endif
 503
 504 /* Number of bits in a pointer for the target machine */
 505 #if !defined (TARGET_PTR_BIT)
 506 #define TARGET_PTR_BIT TARGET_INT_BIT
 507 #endif
 508
 509 /* Default to support for "long long" if the host compiler being used is gcc.
 510    Config files must define CC_HAS_LONG_LONG to use other host compilers
 511    that are capable of supporting "long long", and to cause gdb to use that
 512    support.  Not defining CC_HAS_LONG_LONG will suppress use of "long long"
 513    regardless of what compiler is used.
 514
 515    FIXME: For now, automatic selection of "long long" as the default when
 516    gcc is used is disabled, pending further testing.  Concerns include the
 517    impact on gdb performance and the universality of bugfree long long
 518    support on platforms that do have gcc.  Compiling with FORCE_LONG_LONG
 519    will select "long long" use for testing purposes.  -fnf */
 520
 521 #ifndef CC_HAS_LONG_LONG
 522 #  if defined (__GNUC__) && defined (FORCE_LONG_LONG) /* See FIXME above */
 523 #    define CC_HAS_LONG_LONG 1
 524 #  endif
 525 #endif
 526
 527 /* LONGEST should not be a typedef, because "unsigned LONGEST" needs to work.
 528    CC_HAS_LONG_LONG is defined if the host compiler supports "long long"
 529    variables and we wish to make use of that support.  */
 530
 531 #ifndef LONGEST
 532 #  ifdef CC_HAS_LONG_LONG
 533 #    define LONGEST long long
 534 #  else
 535 #    define LONGEST long
 536 #  endif
 537 #endif
 538
 539 /* Convert a LONGEST to an int.  This is used in contexts (e.g. number of
 540    arguments to a function, number in a value history, register number, etc.)
 541    where the value must not be larger than can fit in an int.  */
 542
 543 #ifndef longest_to_int
 544 #  ifdef CC_HAS_LONG_LONG
 545 #    define longest_to_int(x) (((x) > INT_MAX || (x) < INT_MIN) \
 546                                ? (error ("Value out of range."),0) : (int) (x))
 547 #  else
 548      /* Assume sizeof (int) == sizeof (long).  */
 549 #    define longest_to_int(x) ((int) (x))
 550 #  endif
 551 #endif
 552
 553 /* If we picked up a copy of CHAR_BIT from a configuration file
 554    (which may get it by including <limits.h>) then use it to set
 555    the number of bits in a host char.  If not, use the same size
 556    as the target. */
 557
 558 #if defined (CHAR_BIT)
 559 #define HOST_CHAR_BIT CHAR_BIT
 560 #else
 561 #define HOST_CHAR_BIT TARGET_CHAR_BIT
 562 #endif
 563
 564 /* Assorted functions we can declare, now that const and volatile are
 565    defined.  */
 566
 567 extern char *
 568 savestring PARAMS ((const char *, int));
 569
 570 extern char *
 571 msavestring PARAMS ((void *, const char *, int));
 572
 573 extern char *
 574 strsave PARAMS ((const char *));
 575
 576 extern char *
 577 mstrsave PARAMS ((void *, const char *));
 578
 579 extern char *
 580 concat PARAMS ((char *, ...));
 581
 582 extern PTR
 583 xmalloc PARAMS ((long));
 584
 585 extern PTR
 586 xrealloc PARAMS ((PTR, long));
 587
 588 extern PTR
 589 xmmalloc PARAMS ((PTR, long));
 590
 591 extern PTR
 592 xmrealloc PARAMS ((PTR, PTR, long));
 593
 594 extern PTR
 595 mmalloc PARAMS ((PTR, long));
 596
 597 extern PTR
 598 mrealloc PARAMS ((PTR, PTR, long));
 599
 600 extern void
 601 mfree PARAMS ((PTR, PTR));
 602
 603 extern int
 604 mmcheck PARAMS ((PTR, void (*) (void)));
 605
 606 extern int
 607 mmtrace PARAMS ((void));
 608
 609 extern int
 610 parse_escape PARAMS ((char **));
 611
 612 extern const char * const reg_names[];
 613
 614 extern NORETURN void                    /* Does not return to the caller.  */
 615 error ();
 616
 617 extern NORETURN void                    /* Does not return to the caller.  */
 618 fatal ();
 619
 620 extern NORETURN void                    /* Not specified as volatile in ... */
 621 exit PARAMS ((int));                    /* 4.10.4.3 */
 622
 623 extern NORETURN void                    /* Does not return to the caller.  */
 624 nomem PARAMS ((long));
 625
 626 /* Reasons for calling return_to_top_level.  */
 627 enum return_reason {
 628   /* User interrupt.  */
 629   RETURN_QUIT,
 630
 631   /* Any other error.  */
 632   RETURN_ERROR
 633 };
 634
 635 #define RETURN_MASK_QUIT (1 << (int)RETURN_QUIT)
 636 #define RETURN_MASK_ERROR (1 << (int)RETURN_ERROR)
 637 #define RETURN_MASK_ALL (RETURN_MASK_QUIT | RETURN_MASK_ERROR)
 638 typedef int return_mask;
 639
 640 extern NORETURN void                    /* Does not return to the caller.  */
 641 return_to_top_level PARAMS ((enum return_reason));
 642
 643 extern int catch_errors PARAMS ((int (*) (char *), void *, char *,
 644                                  return_mask));
 645
 646 extern void
 647 warning_setup PARAMS ((void));
 648
 649 extern void
 650 warning ();
 651
 652 /* Global functions from other, non-gdb GNU thingies (libiberty for
 653    instance) */
 654
 655 extern char *
 656 basename PARAMS ((char *));
 657
 658 extern char *
 659 getenv PARAMS ((const char *));
 660
 661 extern char **
 662 buildargv PARAMS ((char *));
 663
 664 extern void
 665 freeargv PARAMS ((char **));
 666
 667 extern char *
 668 strerrno PARAMS ((int));
 669
 670 extern char *
 671 strsigno PARAMS ((int));
 672
 673 extern int
 674 errno_max PARAMS ((void));
 675
 676 extern int
 677 signo_max PARAMS ((void));
 678
 679 extern int
 680 strtoerrno PARAMS ((char *));
 681
 682 extern int
 683 strtosigno PARAMS ((char *));
 684
 685 extern char *
 686 strsignal PARAMS ((int));
 687
 688 /* From other system libraries */
 689
 690 #ifndef PSIGNAL_IN_SIGNAL_H
 691 extern void
 692 psignal PARAMS ((unsigned, const char *));
 693 #endif
 694
 695 /* For now, we can't include <stdlib.h> because it conflicts with
 696    "../include/getopt.h".  (FIXME)
 697
 698    However, if a function is defined in the ANSI C standard and a prototype
 699    for that function is defined and visible in any header file in an ANSI
 700    conforming environment, then that prototype must match the definition in
 701    the ANSI standard.  So we can just duplicate them here without conflict,
 702    since they must be the same in all conforming ANSI environments.  If
 703    these cause problems, then the environment is not ANSI conformant. */
 704
 705 #ifdef __STDC__
 706 #include <stddef.h>
 707 #endif
 708
 709 extern int
 710 fclose PARAMS ((FILE *stream));                         /* 4.9.5.1 */
 711
 712 extern void
 713 perror PARAMS ((const char *));                         /* 4.9.10.4 */
 714
 715 extern double
 716 atof PARAMS ((const char *nptr));                       /* 4.10.1.1 */
 717
 718 extern int
 719 atoi PARAMS ((const char *));                           /* 4.10.1.2 */
 720
 721 #ifndef MALLOC_INCOMPATIBLE
 722
 723 extern PTR
 724 malloc PARAMS ((size_t size));                          /* 4.10.3.3 */
 725
 726 extern PTR
 727 realloc PARAMS ((void *ptr, size_t size));              /* 4.10.3.4 */
 728
 729 extern void
 730 free PARAMS ((void *));                                 /* 4.10.3.2 */
 731
 732 #endif  /* MALLOC_INCOMPATIBLE */
 733
 734 extern void
 735 qsort PARAMS ((void *base, size_t nmemb,                /* 4.10.5.2 */
 736                size_t size,
 737                int (*comp)(const void *, const void *)));
 738
 739 #ifndef MEM_FNS_DECLARED        /* Some non-ANSI use void *, not char *.  */
 740 extern PTR
 741 memcpy PARAMS ((void *, const void *, size_t));         /* 4.11.2.1 */
 742
 743 extern int
 744 memcmp PARAMS ((const void *, const void *, size_t));   /* 4.11.4.1 */
 745 #endif
 746
 747 extern char *
 748 strchr PARAMS ((const char *, int));                    /* 4.11.5.2 */
 749
 750 extern char *
 751 strrchr PARAMS ((const char *, int));                   /* 4.11.5.5 */
 752
 753 extern char *
 754 strstr PARAMS ((const char *, const char *));           /* 4.11.5.7 */
 755
 756 extern char *
 757 strtok PARAMS ((char *, const char *));                 /* 4.11.5.8 */
 758
 759 #ifndef MEM_FNS_DECLARED        /* Some non-ANSI use void *, not char *.  */
 760 extern PTR
 761 memset PARAMS ((void *, int, size_t));                  /* 4.11.6.1 */
 762 #endif
 763
 764 extern char *
 765 strerror PARAMS ((int));                                /* 4.11.6.2 */
 766
 767 /* Various possibilities for alloca.  */
 768 #ifndef alloca
 769 # ifdef __GNUC__
 770 #  define alloca __builtin_alloca
 771 # else
 772 #  ifdef sparc
 773 #   include <alloca.h>          /* NOTE:  Doesn't declare alloca() */
 774 #  endif
 775 #  ifdef __STDC__
 776    extern void *alloca (size_t);
 777 #  else /* __STDC__ */
 778    extern char *alloca ();
 779 #  endif
 780 # endif
 781 #endif
 782
 783 /* TARGET_BYTE_ORDER and HOST_BYTE_ORDER must be defined to one of these.  */
 784
 785 #if !defined (BIG_ENDIAN)
 786 #define BIG_ENDIAN 4321
 787 #endif
 788
 789 #if !defined (LITTLE_ENDIAN)
 790 #define LITTLE_ENDIAN 1234
 791 #endif
 792
 793 /* Target-system-dependent parameters for GDB. */
 794
 795 /* Target machine definition.  This will be a symlink to one of the
 796    tm-*.h files, built by the `configure' script.  */
 797
 798 #include "tm.h"
 799
 800 /* The bit byte-order has to do just with numbering of bits in
 801    debugging symbols and such.  Conceptually, it's quite separate
 802    from byte/word byte order.  */
 803
 804 #if !defined (BITS_BIG_ENDIAN)
 805 #if TARGET_BYTE_ORDER == BIG_ENDIAN
 806 #define BITS_BIG_ENDIAN 1
 807 #endif /* Big endian.  */
 808
 809 #if TARGET_BYTE_ORDER == LITTLE_ENDIAN
 810 #define BITS_BIG_ENDIAN 0
 811 #endif /* Little endian.  */
 812 #endif /* BITS_BIG_ENDIAN not defined.  */
 813
 814 /* Swap LEN bytes at BUFFER between target and host byte-order.  */
 815 #if TARGET_BYTE_ORDER == HOST_BYTE_ORDER
 816 #define SWAP_TARGET_AND_HOST(buffer,len)
 817 #else /* Target and host byte order differ.  */
 818 #define SWAP_TARGET_AND_HOST(buffer,len) \
 819   {                                                                      \
 820     char tmp;                                                            \
 821     char *p = (char *)(buffer);                                          \
 822     char *q = ((char *)(buffer)) + len - 1;                              \
 823     for (; p < q; p++, q--)                                              \
 824       {                                                                  \
 825         tmp = *q;                                                        \
 826         *q = *p;                                                         \
 827         *p = tmp;                                                        \
 828       }                                                                  \
 829   }
 830 #endif /* Target and host byte order differ.  */
 831
 832 /* On some machines there are bits in addresses which are not really
 833    part of the address, but are used by the kernel, the hardware, etc.
 834    for special purposes.  ADDR_BITS_REMOVE takes out any such bits
 835    so we get a "real" address such as one would find in a symbol
 836    table.  ADDR_BITS_SET sets those bits the way the system wants
 837    them.  */
 838 #if !defined (ADDR_BITS_REMOVE)
 839 #define ADDR_BITS_REMOVE(addr) (addr)
 840 #define ADDR_BITS_SET(addr) (addr)
 841 #endif /* No ADDR_BITS_REMOVE.  */
 842
 843 /* From valops.c */
 844
 845 extern CORE_ADDR
 846 push_bytes PARAMS ((CORE_ADDR, char *, int));
 847
 848 /* In some modules, we don't have a definition of REGISTER_TYPE yet, so we
 849    must avoid prototyping this function for now.  FIXME.  Should be:
 850 extern CORE_ADDR
 851 push_word PARAMS ((CORE_ADDR, REGISTER_TYPE));
 852  */
 853 extern CORE_ADDR
 854 push_word ();
 855
 856 /* Some parts of gdb might be considered optional, in the sense that they
 857    are not essential for being able to build a working, usable debugger
 858    for a specific environment.  For example, the maintenance commands
 859    are there for the benefit of gdb maintainers.  As another example,
 860    some environments really don't need gdb's that are able to read N
 861    different object file formats.  In order to make it possible (but
 862    not necessarily recommended) to build "stripped down" versions of
 863    gdb, the following defines control selective compilation of those
 864    parts of gdb which can be safely left out when necessary.  Note that
 865    the default is to include everything. */
 866
 867 #ifndef MAINTENANCE_CMDS
 868 #define MAINTENANCE_CMDS 1
 869 #endif
 870
 871 #endif /* !defined (DEFS_H) */