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 extern int
 299 catch_errors PARAMS ((int (*) (char *), char *, char *));
 300
 301 /* From printcmd.c */
 302
 303 extern void
 304 set_next_address PARAMS ((CORE_ADDR));
 305
 306 extern void
 307 print_address_symbolic PARAMS ((CORE_ADDR, FILE *, int, char *));
 308
 309 extern void
 310 print_address PARAMS ((CORE_ADDR, FILE *));
 311
 312 /* From source.c */
 313
 314 extern int
 315 openp PARAMS ((char *, int, char *, int, int, char **));
 316
 317 extern void
 318 mod_path PARAMS ((char *, char **));
 319
 320 extern void
 321 directory_command PARAMS ((char *, int));
 322
 323 extern void
 324 init_source_path PARAMS ((void));
 325
 326 /* From findvar.c */
 327
 328 extern int
 329 read_relative_register_raw_bytes PARAMS ((int, char *));
 330
 331 /* From readline (but not in any readline .h files).  */
 332
 333 extern char *
 334 tilde_expand PARAMS ((char *));
 335
 336 /* Structure for saved commands lines
 337    (for breakpoints, defined commands, etc).  */
 338
 339 struct command_line
 340 {
 341   struct command_line *next;
 342   char *line;
 343 };
 344
 345 extern struct command_line *
 346 read_command_lines PARAMS ((void));
 347
 348 extern void
 349 free_command_lines PARAMS ((struct command_line **));
 350
 351 /* String containing the current directory (what getwd would return).  */
 352
 353 extern char *current_directory;
 354
 355 /* Default radixes for input and output.  Only some values supported.  */
 356 extern unsigned input_radix;
 357 extern unsigned output_radix;
 358
 359 /* Baud rate specified for communication with serial target systems.  */
 360 extern char *baud_rate;
 361
 362 /* Possibilities for prettyprint parameters to routines which print
 363    things.  Like enum language, this should be in value.h, but needs
 364    to be here for the same reason.  FIXME:  If we can eliminate this
 365    as an arg to LA_VAL_PRINT, then we can probably move it back to
 366    value.h. */
 367
 368 enum val_prettyprint
 369 {
 370   Val_no_prettyprint = 0,
 371   Val_prettyprint,
 372   /* Use the default setting which the user has specified.  */
 373   Val_pretty_default
 374 };
 375
 376 \f
 377 /* Host machine definition.  This will be a symlink to one of the
 378    xm-*.h files, built by the `configure' script.  */
 379
 380 #include "xm.h"
 381
 382 /* Native machine support.  This will be a symlink to one of the
 383    nm-*.h files, built by the `configure' script.  */
 384
 385 #include "nm.h"
 386
 387 /* If the xm.h file did not define the mode string used to open the
 388    files, assume that binary files are opened the same way as text
 389    files */
 390 #ifndef FOPEN_RB
 391 #include "fopen-same.h"
 392 #endif
 393
 394 /*
 395  * Allow things in gdb to be declared "const".  If compiling ANSI, it
 396  * just works.  If compiling with gcc but non-ansi, redefine to __const__.
 397  * If non-ansi, non-gcc, then eliminate "const" entirely, making those
 398  * objects be read-write rather than read-only.
 399  */
 400
 401 #ifndef const
 402 #ifndef __STDC__
 403 # ifdef __GNUC__
 404 #  define const __const__
 405 # else
 406 #  define const /*nothing*/
 407 # endif /* GNUC */
 408 #endif /* STDC */
 409 #endif /* const */
 410
 411 #ifndef volatile
 412 #ifndef __STDC__
 413 # ifdef __GNUC__
 414 #  define volatile __volatile__
 415 # else
 416 #  define volatile /*nothing*/
 417 # endif /* GNUC */
 418 #endif /* STDC */
 419 #endif /* volatile */
 420
 421 /* Some compilers (many AT&T SVR4 compilers for instance), do not accept
 422    declarations of functions that never return (exit for instance) as
 423    "volatile void".  For such compilers "NORETURN" can be defined away
 424    to keep them happy */
 425
 426 #ifndef NORETURN
 427 # ifdef __lucid
 428 #   define NORETURN /*nothing*/
 429 # else
 430 #   define NORETURN volatile
 431 # endif
 432 #endif
 433
 434 /* Defaults for system-wide constants (if not defined by xm.h, we fake it).  */
 435
 436 #if !defined (UINT_MAX)
 437 #define UINT_MAX ((unsigned int)(~0))           /* 0xFFFFFFFF for 32-bits */
 438 #endif
 439
 440 #if !defined (INT_MAX)
 441 #define INT_MAX ((int)(UINT_MAX >> 1))          /* 0x7FFFFFFF for 32-bits */
 442 #endif
 443
 444 #if !defined (INT_MIN)
 445 #define INT_MIN (-INT_MAX - 1)                  /* 0x80000000 for 32-bits */
 446 #endif
 447
 448 #if !defined (ULONG_MAX)
 449 #define ULONG_MAX ((unsigned long)(~0L))        /* 0xFFFFFFFF for 32-bits */
 450 #endif
 451
 452 #if !defined (LONG_MAX)
 453 #define LONG_MAX ((long)(ULONG_MAX >> 1))       /* 0x7FFFFFFF for 32-bits */
 454 #endif
 455
 456 /* Number of bits in a char or unsigned char for the target machine.
 457    Just like CHAR_BIT in <limits.h> but describes the target machine.  */
 458 #if !defined (TARGET_CHAR_BIT)
 459 #define TARGET_CHAR_BIT 8
 460 #endif
 461
 462 /* Number of bits in a short or unsigned short for the target machine. */
 463 #if !defined (TARGET_SHORT_BIT)
 464 #define TARGET_SHORT_BIT (sizeof (short) * TARGET_CHAR_BIT)
 465 #endif
 466
 467 /* Number of bits in an int or unsigned int for the target machine. */
 468 #if !defined (TARGET_INT_BIT)
 469 #define TARGET_INT_BIT (sizeof (int) * TARGET_CHAR_BIT)
 470 #endif
 471
 472 /* Number of bits in a long or unsigned long for the target machine. */
 473 #if !defined (TARGET_LONG_BIT)
 474 #define TARGET_LONG_BIT (sizeof (long) * TARGET_CHAR_BIT)
 475 #endif
 476
 477 /* Number of bits in a long long or unsigned long long for the target machine. */
 478 #if !defined (TARGET_LONG_LONG_BIT)
 479 #define TARGET_LONG_LONG_BIT (2 * TARGET_LONG_BIT)
 480 #endif
 481
 482 /* Number of bits in a float for the target machine. */
 483 #if !defined (TARGET_FLOAT_BIT)
 484 #define TARGET_FLOAT_BIT (sizeof (float) * TARGET_CHAR_BIT)
 485 #endif
 486
 487 /* Number of bits in a double for the target machine. */
 488 #if !defined (TARGET_DOUBLE_BIT)
 489 #define TARGET_DOUBLE_BIT (sizeof (double) * TARGET_CHAR_BIT)
 490 #endif
 491
 492 /* Number of bits in a long double for the target machine. */
 493 #if !defined (TARGET_LONG_DOUBLE_BIT)
 494 #define TARGET_LONG_DOUBLE_BIT (2 * TARGET_DOUBLE_BIT)
 495 #endif
 496
 497 /* Number of bits in a "complex" for the target machine. */
 498 #if !defined (TARGET_COMPLEX_BIT)
 499 #define TARGET_COMPLEX_BIT (2 * TARGET_FLOAT_BIT)
 500 #endif
 501
 502 /* Number of bits in a "double complex" for the target machine. */
 503 #if !defined (TARGET_DOUBLE_COMPLEX_BIT)
 504 #define TARGET_DOUBLE_COMPLEX_BIT (2 * TARGET_DOUBLE_BIT)
 505 #endif
 506
 507 /* Number of bits in a pointer for the target machine */
 508 #if !defined (TARGET_PTR_BIT)
 509 #define TARGET_PTR_BIT TARGET_INT_BIT
 510 #endif
 511
 512 /* Default to support for "long long" if the host compiler being used is gcc.
 513    Config files must define CC_HAS_LONG_LONG to use other host compilers
 514    that are capable of supporting "long long", and to cause gdb to use that
 515    support.  Not defining CC_HAS_LONG_LONG will suppress use of "long long"
 516    regardless of what compiler is used.
 517
 518    FIXME: For now, automatic selection of "long long" as the default when
 519    gcc is used is disabled, pending further testing.  Concerns include the
 520    impact on gdb performance and the universality of bugfree long long
 521    support on platforms that do have gcc.  Compiling with FORCE_LONG_LONG
 522    will select "long long" use for testing purposes.  -fnf */
 523
 524 #ifndef CC_HAS_LONG_LONG
 525 #  if defined (__GNUC__) && defined (FORCE_LONG_LONG) /* See FIXME above */
 526 #    define CC_HAS_LONG_LONG 1
 527 #  endif
 528 #endif
 529
 530 /* LONGEST should not be a typedef, because "unsigned LONGEST" needs to work.
 531    CC_HAS_LONG_LONG is defined if the host compiler supports "long long"
 532    variables and we wish to make use of that support.  */
 533
 534 #ifndef LONGEST
 535 #  ifdef CC_HAS_LONG_LONG
 536 #    define LONGEST long long
 537 #  else
 538 #    define LONGEST long
 539 #  endif
 540 #endif
 541
 542 /* Convert a LONGEST to an int.  This is used in contexts (e.g. number of
 543    arguments to a function, number in a value history, register number, etc.)
 544    where the value must not be larger than can fit in an int.  */
 545
 546 #ifndef longest_to_int
 547 #  ifdef CC_HAS_LONG_LONG
 548 #    define longest_to_int(x) (((x) > INT_MAX || (x) < INT_MIN) \
 549                                ? (error ("Value out of range."),0) : (int) (x))
 550 #  else
 551      /* Assume sizeof (int) == sizeof (long).  */
 552 #    define longest_to_int(x) ((int) (x))
 553 #  endif
 554 #endif
 555
 556 /* If we picked up a copy of CHAR_BIT from a configuration file
 557    (which may get it by including <limits.h>) then use it to set
 558    the number of bits in a host char.  If not, use the same size
 559    as the target. */
 560
 561 #if defined (CHAR_BIT)
 562 #define HOST_CHAR_BIT CHAR_BIT
 563 #else
 564 #define HOST_CHAR_BIT TARGET_CHAR_BIT
 565 #endif
 566
 567 /* Assorted functions we can declare, now that const and volatile are
 568    defined.  */
 569
 570 extern char *
 571 savestring PARAMS ((const char *, int));
 572
 573 extern char *
 574 msavestring PARAMS ((void *, const char *, int));
 575
 576 extern char *
 577 strsave PARAMS ((const char *));
 578
 579 extern char *
 580 mstrsave PARAMS ((void *, const char *));
 581
 582 extern char *
 583 concat PARAMS ((char *, ...));
 584
 585 extern PTR
 586 xmalloc PARAMS ((long));
 587
 588 extern PTR
 589 xrealloc PARAMS ((PTR, long));
 590
 591 extern PTR
 592 xmmalloc PARAMS ((PTR, long));
 593
 594 extern PTR
 595 xmrealloc PARAMS ((PTR, PTR, long));
 596
 597 extern PTR
 598 mmalloc PARAMS ((PTR, long));
 599
 600 extern PTR
 601 mrealloc PARAMS ((PTR, PTR, long));
 602
 603 extern void
 604 mfree PARAMS ((PTR, PTR));
 605
 606 extern int
 607 mmcheck PARAMS ((PTR, void (*) (void)));
 608
 609 extern int
 610 mmtrace PARAMS ((void));
 611
 612 extern int
 613 parse_escape PARAMS ((char **));
 614
 615 extern const char * const reg_names[];
 616
 617 extern NORETURN void                    /* Does not return to the caller.  */
 618 error ();
 619
 620 extern NORETURN void                    /* Does not return to the caller.  */
 621 fatal ();
 622
 623 extern NORETURN void                    /* Not specified as volatile in ... */
 624 exit PARAMS ((int));                    /* 4.10.4.3 */
 625
 626 extern NORETURN void                    /* Does not return to the caller.  */
 627 nomem PARAMS ((long));
 628
 629 extern NORETURN void                    /* Does not return to the caller.  */
 630 return_to_top_level PARAMS ((void));
 631
 632 extern void
 633 warning_setup PARAMS ((void));
 634
 635 extern void
 636 warning ();
 637
 638 /* Global functions from other, non-gdb GNU thingies (libiberty for
 639    instance) */
 640
 641 extern char *
 642 basename PARAMS ((char *));
 643
 644 extern char *
 645 getenv PARAMS ((const char *));
 646
 647 extern char **
 648 buildargv PARAMS ((char *));
 649
 650 extern void
 651 freeargv PARAMS ((char **));
 652
 653 extern char *
 654 strerrno PARAMS ((int));
 655
 656 extern char *
 657 strsigno PARAMS ((int));
 658
 659 extern int
 660 errno_max PARAMS ((void));
 661
 662 extern int
 663 signo_max PARAMS ((void));
 664
 665 extern int
 666 strtoerrno PARAMS ((char *));
 667
 668 extern int
 669 strtosigno PARAMS ((char *));
 670
 671 extern char *
 672 strsignal PARAMS ((int));
 673
 674 /* From other system libraries */
 675
 676 #ifndef PSIGNAL_IN_SIGNAL_H
 677 extern void
 678 psignal PARAMS ((unsigned, const char *));
 679 #endif
 680
 681 /* For now, we can't include <stdlib.h> because it conflicts with
 682    "../include/getopt.h".  (FIXME)
 683
 684    However, if a function is defined in the ANSI C standard and a prototype
 685    for that function is defined and visible in any header file in an ANSI
 686    conforming environment, then that prototype must match the definition in
 687    the ANSI standard.  So we can just duplicate them here without conflict,
 688    since they must be the same in all conforming ANSI environments.  If
 689    these cause problems, then the environment is not ANSI conformant. */
 690
 691 #ifdef __STDC__
 692 #include <stddef.h>
 693 #endif
 694
 695 extern int
 696 fclose PARAMS ((FILE *stream));                         /* 4.9.5.1 */
 697
 698 extern void
 699 perror PARAMS ((const char *));                         /* 4.9.10.4 */
 700
 701 extern double
 702 atof PARAMS ((const char *nptr));                       /* 4.10.1.1 */
 703
 704 extern int
 705 atoi PARAMS ((const char *));                           /* 4.10.1.2 */
 706
 707 #ifndef MALLOC_INCOMPATIBLE
 708
 709 extern PTR
 710 malloc PARAMS ((size_t size));                          /* 4.10.3.3 */
 711
 712 extern PTR
 713 realloc PARAMS ((void *ptr, size_t size));              /* 4.10.3.4 */
 714
 715 extern void
 716 free PARAMS ((void *));                                 /* 4.10.3.2 */
 717
 718 #endif  /* MALLOC_INCOMPATIBLE */
 719
 720 extern void
 721 qsort PARAMS ((void *base, size_t nmemb,                /* 4.10.5.2 */
 722                size_t size,
 723                int (*comp)(const void *, const void *)));
 724
 725 #ifndef MEM_FNS_DECLARED        /* Some non-ANSI use void *, not char *.  */
 726 extern PTR
 727 memcpy PARAMS ((void *, const void *, size_t));         /* 4.11.2.1 */
 728
 729 extern int
 730 memcmp PARAMS ((const void *, const void *, size_t));   /* 4.11.4.1 */
 731 #endif
 732
 733 extern char *
 734 strchr PARAMS ((const char *, int));                    /* 4.11.5.2 */
 735
 736 extern char *
 737 strrchr PARAMS ((const char *, int));                   /* 4.11.5.5 */
 738
 739 extern char *
 740 strstr PARAMS ((const char *, const char *));           /* 4.11.5.7 */
 741
 742 extern char *
 743 strtok PARAMS ((char *, const char *));                 /* 4.11.5.8 */
 744
 745 #ifndef MEM_FNS_DECLARED        /* Some non-ANSI use void *, not char *.  */
 746 extern PTR
 747 memset PARAMS ((void *, int, size_t));                  /* 4.11.6.1 */
 748 #endif
 749
 750 extern char *
 751 strerror PARAMS ((int));                                /* 4.11.6.2 */
 752
 753 /* Various possibilities for alloca.  */
 754 #ifndef alloca
 755 # ifdef __GNUC__
 756 #  define alloca __builtin_alloca
 757 # else
 758 #  ifdef sparc
 759 #   include <alloca.h>          /* NOTE:  Doesn't declare alloca() */
 760 #  endif
 761 #  ifdef __STDC__
 762    extern void *alloca (size_t);
 763 #  else /* __STDC__ */
 764    extern char *alloca ();
 765 #  endif
 766 # endif
 767 #endif
 768
 769 /* TARGET_BYTE_ORDER and HOST_BYTE_ORDER must be defined to one of these.  */
 770
 771 #if !defined (BIG_ENDIAN)
 772 #define BIG_ENDIAN 4321
 773 #endif
 774
 775 #if !defined (LITTLE_ENDIAN)
 776 #define LITTLE_ENDIAN 1234
 777 #endif
 778
 779 /* Target-system-dependent parameters for GDB.
 780
 781    The standard thing is to include defs.h.  However, files that are
 782    specific to a particular target can define TM_FILE_OVERRIDE before
 783    including defs.h, then can include any particular tm-file they desire.  */
 784
 785 /* Target machine definition.  This will be a symlink to one of the
 786    tm-*.h files, built by the `configure' script.  */
 787
 788 #ifndef TM_FILE_OVERRIDE
 789 #include "tm.h"
 790 #endif
 791
 792 /* The bit byte-order has to do just with numbering of bits in
 793    debugging symbols and such.  Conceptually, it's quite separate
 794    from byte/word byte order.  */
 795
 796 #if !defined (BITS_BIG_ENDIAN)
 797 #if TARGET_BYTE_ORDER == BIG_ENDIAN
 798 #define BITS_BIG_ENDIAN 1
 799 #endif /* Big endian.  */
 800
 801 #if TARGET_BYTE_ORDER == LITTLE_ENDIAN
 802 #define BITS_BIG_ENDIAN 0
 803 #endif /* Little endian.  */
 804 #endif /* BITS_BIG_ENDIAN not defined.  */
 805
 806 /* Swap LEN bytes at BUFFER between target and host byte-order.  */
 807 #if TARGET_BYTE_ORDER == HOST_BYTE_ORDER
 808 #define SWAP_TARGET_AND_HOST(buffer,len)
 809 #else /* Target and host byte order differ.  */
 810 #define SWAP_TARGET_AND_HOST(buffer,len) \
 811   {                                                                      \
 812     char tmp;                                                            \
 813     char *p = (char *)(buffer);                                          \
 814     char *q = ((char *)(buffer)) + len - 1;                              \
 815     for (; p < q; p++, q--)                                              \
 816       {                                                                  \
 817         tmp = *q;                                                        \
 818         *q = *p;                                                         \
 819         *p = tmp;                                                        \
 820       }                                                                  \
 821   }
 822 #endif /* Target and host byte order differ.  */
 823
 824 /* On some machines there are bits in addresses which are not really
 825    part of the address, but are used by the kernel, the hardware, etc.
 826    for special purposes.  ADDR_BITS_REMOVE takes out any such bits
 827    so we get a "real" address such as one would find in a symbol
 828    table.  ADDR_BITS_SET sets those bits the way the system wants
 829    them.  */
 830 #if !defined (ADDR_BITS_REMOVE)
 831 #define ADDR_BITS_REMOVE(addr) (addr)
 832 #define ADDR_BITS_SET(addr) (addr)
 833 #endif /* No ADDR_BITS_REMOVE.  */
 834
 835 /* From valops.c */
 836
 837 extern CORE_ADDR
 838 push_bytes PARAMS ((CORE_ADDR, char *, int));
 839
 840 /* In some modules, we don't have a definition of REGISTER_TYPE yet, so we
 841    must avoid prototyping this function for now.  FIXME.  Should be:
 842 extern CORE_ADDR
 843 push_word PARAMS ((CORE_ADDR, REGISTER_TYPE));
 844  */
 845 extern CORE_ADDR
 846 push_word ();
 847
 848 /* Some parts of gdb might be considered optional, in the sense that they
 849    are not essential for being able to build a working, usable debugger
 850    for a specific environment.  For example, the maintenance commands
 851    are there for the benefit of gdb maintainers.  As another example,
 852    some environments really don't need gdb's that are able to read N
 853    different object file formats.  In order to make it possible (but
 854    not necessarily recommended) to build "stripped down" versions of
 855    gdb, the following defines control selective compilation of those
 856    parts of gdb which can be safely left out when necessary.  Note that
 857    the default is to include everything. */
 858
 859 #ifndef MAINTENANCE_CMDS
 860 #define MAINTENANCE_CMDS 1
 861 #endif
 862
 863 #endif /* !defined (DEFS_H) */