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 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                                 /* start-sanitize-chill */
  87    language_chill,              /* Chill */
  88                                 /* end-sanitize-chill */
  89    language_m2                  /* Modula-2 */
  90 };
  91
  92 /* the cleanup list records things that have to be undone
  93    if an error happens (descriptors to be closed, memory to be freed, etc.)
  94    Each link in the chain records a function to call and an
  95    argument to give it.
  96
  97    Use make_cleanup to add an element to the cleanup chain.
  98    Use do_cleanups to do all cleanup actions back to a given
  99    point in the chain.  Use discard_cleanups to remove cleanups
 100    from the chain back to a given point, not doing them.  */
 101
 102 struct cleanup
 103 {
 104   struct cleanup *next;
 105   void (*function) PARAMS ((PTR));
 106   PTR arg;
 107 };
 108
 109 /* From blockframe.c */
 110
 111 extern int
 112 inside_entry_func PARAMS ((CORE_ADDR));
 113
 114 extern int
 115 inside_entry_file PARAMS ((CORE_ADDR addr));
 116
 117 extern int
 118 inside_main_func PARAMS ((CORE_ADDR pc));
 119
 120 /* start-sanitize-chill */
 121 /* From ch-lang.c, for the moment. (FIXME) */
 122
 123 extern char *
 124 chill_demangle PARAMS ((const char *));
 125 /* end-sanitize-chill */
 126
 127 /* From libiberty.a */
 128
 129 extern char *
 130 cplus_demangle PARAMS ((const char *, int));
 131
 132 extern char *
 133 cplus_mangle_opname PARAMS ((char *, int));
 134
 135 /* From libmmalloc.a (memory mapped malloc library) */
 136
 137 extern PTR
 138 mmalloc_attach PARAMS ((int, PTR));
 139
 140 extern PTR
 141 mmalloc_detach PARAMS ((PTR));
 142
 143 extern PTR
 144 mmalloc PARAMS ((PTR, long));
 145
 146 extern PTR
 147 mrealloc PARAMS ((PTR, PTR, long));
 148
 149 extern void
 150 mfree PARAMS ((PTR, PTR));
 151
 152 extern int
 153 mmalloc_setkey PARAMS ((PTR, int, PTR));
 154
 155 extern PTR
 156 mmalloc_getkey PARAMS ((PTR, int));
 157
 158 /* From utils.c */
 159
 160 extern int
 161 strcmp_iw PARAMS ((const char *, const char *));
 162
 163 extern char *
 164 safe_strerror PARAMS ((int));
 165
 166 extern char *
 167 safe_strsignal PARAMS ((int));
 168
 169 extern void
 170 init_malloc PARAMS ((PTR));
 171
 172 extern void
 173 request_quit PARAMS ((int));
 174
 175 extern void
 176 do_cleanups PARAMS ((struct cleanup *));
 177
 178 extern void
 179 discard_cleanups PARAMS ((struct cleanup *));
 180
 181 /* The bare make_cleanup function is one of those rare beasts that
 182    takes almost any type of function as the first arg and anything that
 183    will fit in a "void *" as the second arg.
 184
 185    Should be, once all calls and called-functions are cleaned up:
 186 extern struct cleanup *
 187 make_cleanup PARAMS ((void (*function) (PTR), PTR));
 188
 189    Until then, lint and/or various type-checking compiler options will
 190    complain about make_cleanup calls.  It'd be wrong to just cast things,
 191    since the type actually passed when the function is called would be
 192    wrong.  */
 193
 194 extern struct cleanup *
 195 make_cleanup ();
 196
 197 extern struct cleanup *
 198 save_cleanups PARAMS ((void));
 199
 200 extern void
 201 restore_cleanups PARAMS ((struct cleanup *));
 202
 203 extern void
 204 free_current_contents PARAMS ((char **));
 205
 206 extern void
 207 null_cleanup PARAMS ((char **));
 208
 209 extern int
 210 myread PARAMS ((int, char *, int));
 211
 212 extern int
 213 query ();
 214
 215 extern void
 216 begin_line PARAMS ((void));
 217
 218 extern void
 219 wrap_here PARAMS ((char *));
 220
 221 extern void
 222 reinitialize_more_filter PARAMS ((void));
 223
 224 extern int
 225 print_insn PARAMS ((CORE_ADDR, FILE *));
 226
 227 extern void
 228 fputs_filtered PARAMS ((const char *, FILE *));
 229
 230 extern void
 231 puts_filtered PARAMS ((char *));
 232
 233 extern void
 234 vprintf_filtered ();
 235
 236 extern void
 237 vfprintf_filtered ();
 238
 239 extern void
 240 fprintf_filtered ();
 241
 242 extern void
 243 fprintfi_filtered ();
 244
 245 extern void
 246 printf_filtered ();
 247
 248 extern void
 249 printfi_filtered ();
 250
 251 extern void
 252 print_spaces PARAMS ((int, FILE *));
 253
 254 extern void
 255 print_spaces_filtered PARAMS ((int, FILE *));
 256
 257 extern char *
 258 n_spaces PARAMS ((int));
 259
 260 extern void
 261 gdb_printchar PARAMS ((int, FILE *, int));
 262
 263 extern void
 264 fprint_symbol PARAMS ((FILE *, char *));
 265
 266 extern void
 267 fputs_demangled PARAMS ((char *, FILE *, int, enum language));
 268
 269 extern void
 270 perror_with_name PARAMS ((char *));
 271
 272 extern void
 273 print_sys_errmsg PARAMS ((char *, int));
 274
 275 /* From regex.c */
 276
 277 extern char *
 278 re_comp PARAMS ((char *));
 279
 280 /* From symfile.c */
 281
 282 extern void
 283 symbol_file_command PARAMS ((char *, int));
 284
 285 /* From main.c */
 286
 287 extern char *
 288 skip_quoted PARAMS ((char *));
 289
 290 extern char *
 291 gdb_readline PARAMS ((char *));
 292
 293 extern char *
 294 command_line_input PARAMS ((char *, int));
 295
 296 extern void
 297 print_prompt PARAMS ((void));
 298
 299 extern int
 300 batch_mode PARAMS ((void));
 301
 302 extern int
 303 input_from_terminal_p PARAMS ((void));
 304
 305 extern int
 306 catch_errors PARAMS ((int (*) (char *), char *, char *));
 307
 308 /* From printcmd.c */
 309
 310 extern void
 311 set_next_address PARAMS ((CORE_ADDR));
 312
 313 extern void
 314 print_address_symbolic PARAMS ((CORE_ADDR, FILE *, int, char *));
 315
 316 extern void
 317 print_address PARAMS ((CORE_ADDR, FILE *));
 318
 319 /* From source.c */
 320
 321 extern int
 322 openp PARAMS ((char *, int, char *, int, int, char **));
 323
 324 extern void
 325 mod_path PARAMS ((char *, char **));
 326
 327 extern void
 328 directory_command PARAMS ((char *, int));
 329
 330 extern void
 331 init_source_path PARAMS ((void));
 332
 333 /* From findvar.c */
 334
 335 extern int
 336 read_relative_register_raw_bytes PARAMS ((int, char *));
 337
 338 /* From readline (but not in any readline .h files).  */
 339
 340 extern char *
 341 tilde_expand PARAMS ((char *));
 342
 343 /* Structure for saved commands lines
 344    (for breakpoints, defined commands, etc).  */
 345
 346 struct command_line
 347 {
 348   struct command_line *next;
 349   char *line;
 350 };
 351
 352 extern struct command_line *
 353 read_command_lines PARAMS ((void));
 354
 355 extern void
 356 free_command_lines PARAMS ((struct command_line **));
 357
 358 /* String containing the current directory (what getwd would return).  */
 359
 360 extern char *current_directory;
 361
 362 /* Default radixes for input and output.  Only some values supported.  */
 363 extern unsigned input_radix;
 364 extern unsigned output_radix;
 365
 366 /* Baud rate specified for communication with serial target systems.  */
 367 extern char *baud_rate;
 368
 369 /* Possibilities for prettyprint parameters to routines which print
 370    things.  Like enum language, this should be in value.h, but needs
 371    to be here for the same reason.  FIXME:  If we can eliminate this
 372    as an arg to LA_VAL_PRINT, then we can probably move it back to
 373    value.h. */
 374
 375 enum val_prettyprint
 376 {
 377   Val_no_prettyprint = 0,
 378   Val_prettyprint,
 379   /* Use the default setting which the user has specified.  */
 380   Val_pretty_default
 381 };
 382
 383 \f
 384 /* Host machine definition.  This will be a symlink to one of the
 385    xm-*.h files, built by the `configure' script.  */
 386
 387 #include "xm.h"
 388
 389 /* Native machine support.  This will be a symlink to one of the
 390    nm-*.h files, built by the `configure' script.  */
 391
 392 #include "nm.h"
 393
 394 /* If the xm.h file did not define the mode string used to open the
 395    files, assume that binary files are opened the same way as text
 396    files */
 397 #ifndef FOPEN_RB
 398 #include "fopen-same.h"
 399 #endif
 400
 401 /*
 402  * Allow things in gdb to be declared "const".  If compiling ANSI, it
 403  * just works.  If compiling with gcc but non-ansi, redefine to __const__.
 404  * If non-ansi, non-gcc, then eliminate "const" entirely, making those
 405  * objects be read-write rather than read-only.
 406  */
 407
 408 #ifndef const
 409 #ifndef __STDC__
 410 # ifdef __GNUC__
 411 #  define const __const__
 412 # else
 413 #  define const /*nothing*/
 414 # endif /* GNUC */
 415 #endif /* STDC */
 416 #endif /* const */
 417
 418 #ifndef volatile
 419 #ifndef __STDC__
 420 # ifdef __GNUC__
 421 #  define volatile __volatile__
 422 # else
 423 #  define volatile /*nothing*/
 424 # endif /* GNUC */
 425 #endif /* STDC */
 426 #endif /* volatile */
 427
 428 /* Some compilers (many AT&T SVR4 compilers for instance), do not accept
 429    declarations of functions that never return (exit for instance) as
 430    "volatile void".  For such compilers "NORETURN" can be defined away
 431    to keep them happy */
 432
 433 #ifndef NORETURN
 434 # ifdef __lucid
 435 #   define NORETURN /*nothing*/
 436 # else
 437 #   define NORETURN volatile
 438 # endif
 439 #endif
 440
 441 /* Defaults for system-wide constants (if not defined by xm.h, we fake it).  */
 442
 443 #if !defined (UINT_MAX)
 444 #define UINT_MAX 0xffffffff
 445 #endif
 446
 447 #if !defined (LONG_MAX)
 448 #define LONG_MAX 0x7fffffff
 449 #endif
 450
 451 #if !defined (INT_MAX)
 452 #define INT_MAX 0x7fffffff
 453 #endif
 454
 455 #if !defined (INT_MIN)
 456 /* Two's complement, 32 bit.  */
 457 #define INT_MIN -0x80000000
 458 #endif
 459
 460 /* Number of bits in a char or unsigned char for the target machine.
 461    Just like CHAR_BIT in <limits.h> but describes the target machine.  */
 462 #if !defined (TARGET_CHAR_BIT)
 463 #define TARGET_CHAR_BIT 8
 464 #endif
 465
 466 /* Number of bits in a short or unsigned short for the target machine. */
 467 #if !defined (TARGET_SHORT_BIT)
 468 #define TARGET_SHORT_BIT (sizeof (short) * TARGET_CHAR_BIT)
 469 #endif
 470
 471 /* Number of bits in an int or unsigned int for the target machine. */
 472 #if !defined (TARGET_INT_BIT)
 473 #define TARGET_INT_BIT (sizeof (int) * TARGET_CHAR_BIT)
 474 #endif
 475
 476 /* Number of bits in a long or unsigned long for the target machine. */
 477 #if !defined (TARGET_LONG_BIT)
 478 #define TARGET_LONG_BIT (sizeof (long) * TARGET_CHAR_BIT)
 479 #endif
 480
 481 /* Number of bits in a long long or unsigned long long for the target machine. */
 482 #if !defined (TARGET_LONG_LONG_BIT)
 483 #define TARGET_LONG_LONG_BIT (2 * TARGET_LONG_BIT)
 484 #endif
 485
 486 /* Number of bits in a float for the target machine. */
 487 #if !defined (TARGET_FLOAT_BIT)
 488 #define TARGET_FLOAT_BIT (sizeof (float) * TARGET_CHAR_BIT)
 489 #endif
 490
 491 /* Number of bits in a double for the target machine. */
 492 #if !defined (TARGET_DOUBLE_BIT)
 493 #define TARGET_DOUBLE_BIT (sizeof (double) * TARGET_CHAR_BIT)
 494 #endif
 495
 496 /* Number of bits in a long double for the target machine. */
 497 #if !defined (TARGET_LONG_DOUBLE_BIT)
 498 #define TARGET_LONG_DOUBLE_BIT (2 * TARGET_DOUBLE_BIT)
 499 #endif
 500
 501 /* Number of bits in a "complex" for the target machine. */
 502 #if !defined (TARGET_COMPLEX_BIT)
 503 #define TARGET_COMPLEX_BIT (2 * TARGET_FLOAT_BIT)
 504 #endif
 505
 506 /* Number of bits in a "double complex" for the target machine. */
 507 #if !defined (TARGET_DOUBLE_COMPLEX_BIT)
 508 #define TARGET_DOUBLE_COMPLEX_BIT (2 * TARGET_DOUBLE_BIT)
 509 #endif
 510
 511 /* Number of bits in a pointer for the target machine */
 512 #if !defined (TARGET_PTR_BIT)
 513 #define TARGET_PTR_BIT TARGET_INT_BIT
 514 #endif
 515
 516 /* Convert a LONGEST to an int.  This is used in contexts (e.g. number
 517    of arguments to a function, number in a value history, register
 518    number, etc.) where the value must not be larger than can fit
 519    in an int.  */
 520 #if !defined (longest_to_int)
 521 #if defined (LONG_LONG)
 522 #define longest_to_int(x) (((x) > INT_MAX || (x) < INT_MIN) \
 523                            ? (error ("Value out of range."),0) : (int) (x))
 524 #else /* No LONG_LONG.  */
 525 /* Assume sizeof (int) == sizeof (long).  */
 526 #define longest_to_int(x) ((int) (x))
 527 #endif /* No LONG_LONG.  */
 528 #endif /* No longest_to_int.  */
 529
 530 /* This should not be a typedef, because "unsigned LONGEST" needs
 531    to work. LONG_LONG is defined if the host has "long long".  */
 532
 533 #ifndef LONGEST
 534 # ifdef LONG_LONG
 535 #  define LONGEST long long
 536 # else
 537 #  define LONGEST long
 538 # endif
 539 #endif
 540
 541 /* If we picked up a copy of CHAR_BIT from a configuration file
 542    (which may get it by including <limits.h>) then use it to set
 543    the number of bits in a host char.  If not, use the same size
 544    as the target. */
 545
 546 #if defined (CHAR_BIT)
 547 #define HOST_CHAR_BIT CHAR_BIT
 548 #else
 549 #define HOST_CHAR_BIT TARGET_CHAR_BIT
 550 #endif
 551
 552 /* Assorted functions we can declare, now that const and volatile are
 553    defined.  */
 554
 555 extern char *
 556 savestring PARAMS ((const char *, int));
 557
 558 extern char *
 559 msavestring PARAMS ((void *, const char *, int));
 560
 561 extern char *
 562 strsave PARAMS ((const char *));
 563
 564 extern char *
 565 mstrsave PARAMS ((void *, const char *));
 566
 567 extern char *
 568 concat PARAMS ((char *, ...));
 569
 570 extern PTR
 571 xmalloc PARAMS ((long));
 572
 573 extern PTR
 574 xrealloc PARAMS ((PTR, long));
 575
 576 extern PTR
 577 xmmalloc PARAMS ((PTR, long));
 578
 579 extern PTR
 580 xmrealloc PARAMS ((PTR, PTR, long));
 581
 582 extern PTR
 583 mmalloc PARAMS ((PTR, long));
 584
 585 extern PTR
 586 mrealloc PARAMS ((PTR, PTR, long));
 587
 588 extern void
 589 mfree PARAMS ((PTR, PTR));
 590
 591 extern int
 592 mmcheck PARAMS ((PTR, void (*) (void)));
 593
 594 extern int
 595 mmtrace PARAMS ((void));
 596
 597 extern int
 598 parse_escape PARAMS ((char **));
 599
 600 extern const char * const reg_names[];
 601
 602 extern NORETURN void                    /* Does not return to the caller.  */
 603 error ();
 604
 605 extern NORETURN void                    /* Does not return to the caller.  */
 606 fatal ();
 607
 608 extern NORETURN void                    /* Not specified as volatile in ... */
 609 exit PARAMS ((int));                    /* 4.10.4.3 */
 610
 611 extern NORETURN void                    /* Does not return to the caller.  */
 612 nomem PARAMS ((long));
 613
 614 extern NORETURN void                    /* Does not return to the caller.  */
 615 return_to_top_level PARAMS ((void));
 616
 617 extern void
 618 warning_setup PARAMS ((void));
 619
 620 extern void
 621 warning ();
 622
 623 /* Global functions from other, non-gdb GNU thingies (libiberty for
 624    instance) */
 625
 626 extern char *
 627 basename PARAMS ((char *));
 628
 629 extern char *
 630 getenv PARAMS ((const char *));
 631
 632 extern char **
 633 buildargv PARAMS ((char *));
 634
 635 extern void
 636 freeargv PARAMS ((char **));
 637
 638 extern char *
 639 strerrno PARAMS ((int));
 640
 641 extern char *
 642 strsigno PARAMS ((int));
 643
 644 extern int
 645 errno_max PARAMS ((void));
 646
 647 extern int
 648 signo_max PARAMS ((void));
 649
 650 extern int
 651 strtoerrno PARAMS ((char *));
 652
 653 extern int
 654 strtosigno PARAMS ((char *));
 655
 656 extern char *
 657 strsignal PARAMS ((int));
 658
 659 /* From other system libraries */
 660
 661 #ifndef PSIGNAL_IN_SIGNAL_H
 662 extern void
 663 psignal PARAMS ((unsigned, char *));
 664 #endif
 665
 666 /* For now, we can't include <stdlib.h> because it conflicts with
 667    "../include/getopt.h".  (FIXME)
 668
 669    However, if a function is defined in the ANSI C standard and a prototype
 670    for that function is defined and visible in any header file in an ANSI
 671    conforming environment, then that prototype must match the definition in
 672    the ANSI standard.  So we can just duplicate them here without conflict,
 673    since they must be the same in all conforming ANSI environments.  If
 674    these cause problems, then the environment is not ANSI conformant. */
 675
 676 #ifdef __STDC__
 677 #include <stddef.h>
 678 #endif
 679
 680 extern int
 681 fclose PARAMS ((FILE *stream));                         /* 4.9.5.1 */
 682
 683 extern void
 684 perror PARAMS ((const char *));                         /* 4.9.10.4 */
 685
 686 extern double
 687 atof PARAMS ((const char *nptr));                       /* 4.10.1.1 */
 688
 689 extern int
 690 atoi PARAMS ((const char *));                           /* 4.10.1.2 */
 691
 692 #ifndef MALLOC_INCOMPATIBLE
 693
 694 extern PTR
 695 malloc PARAMS ((size_t size));                          /* 4.10.3.3 */
 696
 697 extern PTR
 698 realloc PARAMS ((void *ptr, size_t size));              /* 4.10.3.4 */
 699
 700 extern void
 701 free PARAMS ((void *));                                 /* 4.10.3.2 */
 702
 703 #endif  /* MALLOC_INCOMPATIBLE */
 704
 705 extern void
 706 qsort PARAMS ((void *base, size_t nmemb,                /* 4.10.5.2 */
 707                size_t size,
 708                int (*comp)(const void *, const void *)));
 709
 710 #ifndef MEM_FNS_DECLARED        /* Some non-ANSI use void *, not char *.  */
 711 extern PTR
 712 memcpy PARAMS ((void *, const void *, size_t));         /* 4.11.2.1 */
 713 #endif
 714
 715 extern int
 716 memcmp PARAMS ((const void *, const void *, size_t));   /* 4.11.4.1 */
 717
 718 extern char *
 719 strchr PARAMS ((const char *, int));                    /* 4.11.5.2 */
 720
 721 extern char *
 722 strrchr PARAMS ((const char *, int));                   /* 4.11.5.5 */
 723
 724 extern char *
 725 strstr PARAMS ((const char *, const char *));           /* 4.11.5.7 */
 726
 727 extern char *
 728 strtok PARAMS ((char *, const char *));                 /* 4.11.5.8 */
 729
 730 #ifndef MEM_FNS_DECLARED        /* Some non-ANSI use void *, not char *.  */
 731 extern PTR
 732 memset PARAMS ((void *, int, size_t));                  /* 4.11.6.1 */
 733 #endif
 734
 735 extern char *
 736 strerror PARAMS ((int));                                /* 4.11.6.2 */
 737
 738 /* Various possibilities for alloca.  */
 739 #ifndef alloca
 740 # ifdef __GNUC__
 741 #  define alloca __builtin_alloca
 742 # else
 743 #  ifdef sparc
 744 #   include <alloca.h>          /* NOTE:  Doesn't declare alloca() */
 745 #  endif
 746 #  ifdef __STDC__
 747    extern void *alloca (size_t);
 748 #  else /* __STDC__ */
 749    extern char *alloca ();
 750 #  endif
 751 # endif
 752 #endif
 753
 754 /* TARGET_BYTE_ORDER and HOST_BYTE_ORDER must be defined to one of these.  */
 755
 756 #if !defined (BIG_ENDIAN)
 757 #define BIG_ENDIAN 4321
 758 #endif
 759
 760 #if !defined (LITTLE_ENDIAN)
 761 #define LITTLE_ENDIAN 1234
 762 #endif
 763
 764 /* Target-system-dependent parameters for GDB.
 765
 766    The standard thing is to include defs.h.  However, files that are
 767    specific to a particular target can define TM_FILE_OVERRIDE before
 768    including defs.h, then can include any particular tm-file they desire.  */
 769
 770 /* Target machine definition.  This will be a symlink to one of the
 771    tm-*.h files, built by the `configure' script.  */
 772
 773 #ifndef TM_FILE_OVERRIDE
 774 #include "tm.h"
 775 #endif
 776
 777 /* The bit byte-order has to do just with numbering of bits in
 778    debugging symbols and such.  Conceptually, it's quite separate
 779    from byte/word byte order.  */
 780
 781 #if !defined (BITS_BIG_ENDIAN)
 782 #if TARGET_BYTE_ORDER == BIG_ENDIAN
 783 #define BITS_BIG_ENDIAN 1
 784 #endif /* Big endian.  */
 785
 786 #if TARGET_BYTE_ORDER == LITTLE_ENDIAN
 787 #define BITS_BIG_ENDIAN 0
 788 #endif /* Little endian.  */
 789 #endif /* BITS_BIG_ENDIAN not defined.  */
 790
 791 /* Swap LEN bytes at BUFFER between target and host byte-order.  */
 792 #if TARGET_BYTE_ORDER == HOST_BYTE_ORDER
 793 #define SWAP_TARGET_AND_HOST(buffer,len)
 794 #else /* Target and host byte order differ.  */
 795 #define SWAP_TARGET_AND_HOST(buffer,len) \
 796   {                                                                      \
 797     char tmp;                                                            \
 798     char *p = (char *)(buffer);                                          \
 799     char *q = ((char *)(buffer)) + len - 1;                              \
 800     for (; p < q; p++, q--)                                              \
 801       {                                                                  \
 802         tmp = *q;                                                        \
 803         *q = *p;                                                         \
 804         *p = tmp;                                                        \
 805       }                                                                  \
 806   }
 807 #endif /* Target and host byte order differ.  */
 808
 809 /* On some machines there are bits in addresses which are not really
 810    part of the address, but are used by the kernel, the hardware, etc.
 811    for special purposes.  ADDR_BITS_REMOVE takes out any such bits
 812    so we get a "real" address such as one would find in a symbol
 813    table.  ADDR_BITS_SET sets those bits the way the system wants
 814    them.  */
 815 #if !defined (ADDR_BITS_REMOVE)
 816 #define ADDR_BITS_REMOVE(addr) (addr)
 817 #define ADDR_BITS_SET(addr) (addr)
 818 #endif /* No ADDR_BITS_REMOVE.  */
 819
 820 /* From valops.c */
 821
 822 extern CORE_ADDR
 823 push_bytes PARAMS ((CORE_ADDR, char *, int));
 824
 825 /* In some modules, we don't have a definition of REGISTER_TYPE yet, so we
 826    must avoid prototyping this function for now.  FIXME.  Should be:
 827 extern CORE_ADDR
 828 push_word PARAMS ((CORE_ADDR, REGISTER_TYPE));
 829  */
 830 extern CORE_ADDR
 831 push_word ();
 832
 833 /* Some parts of gdb might be considered optional, in the sense that they
 834    are not essential for being able to build a working, usable debugger
 835    for a specific environment.  For example, the maintenance commands
 836    are there for the benefit of gdb maintainers.  As another example,
 837    some environments really don't need gdb's that are able to read N
 838    different object file formats.  In order to make it possible (but
 839    not necessarily recommended) to build "stripped down" versions of
 840    gdb, the following defines control selective compilation of those
 841    parts of gdb which can be safely left out when necessary.  Note that
 842    the default is to include everything. */
 843
 844 #ifndef MAINTENANCE_CMDS
 845 #define MAINTENANCE_CMDS 1
 846 #endif
 847
 848 #endif /* !defined (DEFS_H) */