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 /* The character C++ uses to build identifiers that must be unique from
  37    the program's identifiers (such as $this and $$vptr).  */
  38 #define CPLUS_MARKER '$'        /* May be overridden to '.' for SysV */
  39
  40 #include <errno.h>              /* System call error return status */
  41
  42 extern int quit_flag;
  43 extern int immediate_quit;
  44
  45 extern void
  46 quit PARAMS ((void));
  47
  48 #define QUIT { if (quit_flag) quit (); }
  49
  50 /* Notes on classes: class_alias is for alias commands which are not
  51    abbreviations of the original command.  */
  52
  53 enum command_class
  54 {
  55   /* Special args to help_list */
  56   all_classes = -2, all_commands = -1,
  57   /* Classes of commands */
  58   no_class = -1, class_run = 0, class_vars, class_stack,
  59   class_files, class_support, class_info, class_breakpoint,
  60   class_alias, class_obscure, class_user, class_maintenance
  61 };
  62
  63 /* the cleanup list records things that have to be undone
  64    if an error happens (descriptors to be closed, memory to be freed, etc.)
  65    Each link in the chain records a function to call and an
  66    argument to give it.
  67
  68    Use make_cleanup to add an element to the cleanup chain.
  69    Use do_cleanups to do all cleanup actions back to a given
  70    point in the chain.  Use discard_cleanups to remove cleanups
  71    from the chain back to a given point, not doing them.  */
  72
  73 struct cleanup
  74 {
  75   struct cleanup *next;
  76   void (*function) PARAMS ((PTR));
  77   PTR arg;
  78 };
  79
  80 /* From blockframe.c */
  81
  82 extern int
  83 inside_entry_func PARAMS ((CORE_ADDR));
  84
  85 extern int
  86 inside_entry_file PARAMS ((CORE_ADDR addr));
  87
  88 extern int
  89 inside_main_func PARAMS ((CORE_ADDR pc));
  90
  91 /* From cplus-dem.c */
  92
  93 extern char *
  94 cplus_demangle PARAMS ((const char *, int));
  95
  96 extern char *
  97 cplus_mangle_opname PARAMS ((char *, int));
  98
  99 /* From libmmalloc.a (memory mapped malloc library) */
 100
 101 extern PTR
 102 mmalloc_attach PARAMS ((int, PTR));
 103
 104 extern PTR
 105 mmalloc_detach PARAMS ((PTR));
 106
 107 extern PTR
 108 mmalloc PARAMS ((PTR, long));
 109
 110 extern PTR
 111 mrealloc PARAMS ((PTR, PTR, long));
 112
 113 extern void
 114 mfree PARAMS ((PTR, PTR));
 115
 116 extern int
 117 mmalloc_setkey PARAMS ((PTR, int, PTR));
 118
 119 extern PTR
 120 mmalloc_getkey PARAMS ((PTR, int));
 121
 122 /* From utils.c */
 123
 124 extern char *
 125 demangle_and_match PARAMS ((const char *, const char *, int));
 126
 127 extern int
 128 strcmp_iw PARAMS ((const char *, const char *));
 129
 130 extern char *
 131 safe_strerror PARAMS ((int));
 132
 133 extern char *
 134 safe_strsignal PARAMS ((int));
 135
 136 extern void
 137 init_malloc PARAMS ((PTR));
 138
 139 extern void
 140 request_quit PARAMS ((int));
 141
 142 extern void
 143 do_cleanups PARAMS ((struct cleanup *));
 144
 145 extern void
 146 discard_cleanups PARAMS ((struct cleanup *));
 147
 148 /* The bare make_cleanup function is one of those rare beasts that
 149    takes almost any type of function as the first arg and anything that
 150    will fit in a "void *" as the second arg.
 151
 152    Should be, once all calls and called-functions are cleaned up:
 153 extern struct cleanup *
 154 make_cleanup PARAMS ((void (*function) (PTR), PTR));
 155
 156    Until then, lint and/or various type-checking compiler options will
 157    complain about make_cleanup calls.  It'd be wrong to just cast things,
 158    since the type actually passed when the function is called would be
 159    wrong.  */
 160
 161 extern struct cleanup *
 162 make_cleanup ();
 163
 164 extern struct cleanup *
 165 save_cleanups PARAMS ((void));
 166
 167 extern void
 168 restore_cleanups PARAMS ((struct cleanup *));
 169
 170 extern void
 171 free_current_contents PARAMS ((char **));
 172
 173 extern void
 174 null_cleanup PARAMS ((char **));
 175
 176 extern int
 177 myread PARAMS ((int, char *, int));
 178
 179 extern int
 180 query ();
 181
 182 extern void
 183 wrap_here PARAMS ((char *));
 184
 185 extern void
 186 reinitialize_more_filter PARAMS ((void));
 187
 188 extern int
 189 print_insn PARAMS ((CORE_ADDR, FILE *));
 190
 191 extern void
 192 fputs_filtered PARAMS ((const char *, FILE *));
 193
 194 extern void
 195 puts_filtered PARAMS ((char *));
 196
 197 extern void
 198 vfprintf_filtered ();
 199
 200 extern void
 201 fprintf_filtered ();
 202
 203 extern void
 204 fprintfi_filtered ();
 205
 206 extern void
 207 printf_filtered ();
 208
 209 extern void
 210 printfi_filtered ();
 211
 212 extern void
 213 print_spaces PARAMS ((int, FILE *));
 214
 215 extern void
 216 print_spaces_filtered PARAMS ((int, FILE *));
 217
 218 extern char *
 219 n_spaces PARAMS ((int));
 220
 221 extern void
 222 printchar PARAMS ((int, FILE *, int));
 223
 224 extern char *
 225 strdup_demangled PARAMS ((const char *));
 226
 227 extern void
 228 fprint_symbol PARAMS ((FILE *, char *));
 229
 230 extern void
 231 fputs_demangled PARAMS ((char *, FILE *, int));
 232
 233 extern void
 234 perror_with_name PARAMS ((char *));
 235
 236 extern void
 237 print_sys_errmsg PARAMS ((char *, int));
 238
 239 /* From regex.c */
 240
 241 extern char *
 242 re_comp PARAMS ((char *));
 243
 244 /* From symfile.c */
 245
 246 extern void
 247 symbol_file_command PARAMS ((char *, int));
 248
 249 /* From main.c */
 250
 251 extern char *
 252 skip_quoted PARAMS ((char *));
 253
 254 extern char *
 255 gdb_readline PARAMS ((char *));
 256
 257 extern char *
 258 command_line_input PARAMS ((char *, int));
 259
 260 extern void
 261 print_prompt PARAMS ((void));
 262
 263 extern int
 264 batch_mode PARAMS ((void));
 265
 266 extern int
 267 input_from_terminal_p PARAMS ((void));
 268
 269 extern int
 270 catch_errors PARAMS ((int (*) (char *), char *, char *));
 271
 272 /* From printcmd.c */
 273
 274 extern void
 275 set_next_address PARAMS ((CORE_ADDR));
 276
 277 extern void
 278 print_address_symbolic PARAMS ((CORE_ADDR, FILE *, int, char *));
 279
 280 extern void
 281 print_address PARAMS ((CORE_ADDR, FILE *));
 282
 283 /* From source.c */
 284
 285 extern int
 286 openp PARAMS ((char *, int, char *, int, int, char **));
 287
 288 extern void
 289 mod_path PARAMS ((char *, char **));
 290
 291 extern void
 292 directory_command PARAMS ((char *, int));
 293
 294 extern void
 295 init_source_path PARAMS ((void));
 296
 297 /* From findvar.c */
 298
 299 extern int
 300 read_relative_register_raw_bytes PARAMS ((int, char *));
 301
 302 /* From readline (but not in any readline .h files).  */
 303
 304 extern char *
 305 tilde_expand PARAMS ((char *));
 306
 307 /* Structure for saved commands lines
 308    (for breakpoints, defined commands, etc).  */
 309
 310 struct command_line
 311 {
 312   struct command_line *next;
 313   char *line;
 314 };
 315
 316 extern struct command_line *
 317 read_command_lines PARAMS ((void));
 318
 319 extern void
 320 free_command_lines PARAMS ((struct command_line **));
 321
 322 /* String containing the current directory (what getwd would return).  */
 323
 324 extern char *current_directory;
 325
 326 /* Default radixes for input and output.  Only some values supported.  */
 327 extern unsigned input_radix;
 328 extern unsigned output_radix;
 329
 330 /* Baud rate specified for communication with serial target systems.  */
 331 extern char *baud_rate;
 332
 333 /* Languages represented in the symbol table and elsewhere. */
 334
 335 enum language
 336 {
 337    language_unknown,            /* Language not known */
 338    language_auto,               /* Placeholder for automatic setting */
 339    language_c,                  /* C */
 340    language_cplus,              /* C++ */
 341    language_m2                  /* Modula-2 */
 342 };
 343
 344 /* Return a format string for printf that will print a number in the local
 345    (language-specific) hexadecimal format.  Result is static and is
 346    overwritten by the next call.  local_hex_format_custom takes printf
 347    options like "08" or "l" (to produce e.g. %08x or %lx).  */
 348
 349 #define local_hex_format() (current_language->la_hex_format)
 350
 351 extern char *
 352 local_hex_format_custom PARAMS ((char *));      /* language.c */
 353
 354 /* Return a string that contains a number formatted in the local
 355    (language-specific) hexadecimal format.  Result is static and is
 356    overwritten by the next call.  local_hex_string_custom takes printf
 357    options like "08" or "l".  */
 358
 359 extern char *
 360 local_hex_string PARAMS ((int));                /* language.c */
 361
 362 extern char *
 363 local_hex_string_custom PARAMS ((int, char *)); /* language.c */
 364
 365 \f
 366 /* Host machine definition.  This will be a symlink to one of the
 367    xm-*.h files, built by the `configure' script.  */
 368
 369 #include "xm.h"
 370
 371 /* If the xm.h file did not define the mode string used to open the
 372    files, assume that binary files are opened the same way as text
 373    files */
 374 #ifndef FOPEN_RB
 375 #include "fopen-same.h"
 376 #endif
 377
 378 /*
 379  * Allow things in gdb to be declared "const".  If compiling ANSI, it
 380  * just works.  If compiling with gcc but non-ansi, redefine to __const__.
 381  * If non-ansi, non-gcc, then eliminate "const" entirely, making those
 382  * objects be read-write rather than read-only.
 383  */
 384
 385 #ifndef const
 386 #ifndef __STDC__
 387 # ifdef __GNUC__
 388 #  define const __const__
 389 # else
 390 #  define const /*nothing*/
 391 # endif /* GNUC */
 392 #endif /* STDC */
 393 #endif /* const */
 394
 395 #ifndef volatile
 396 #ifndef __STDC__
 397 # ifdef __GNUC__
 398 #  define volatile __volatile__
 399 # else
 400 #  define volatile /*nothing*/
 401 # endif /* GNUC */
 402 #endif /* STDC */
 403 #endif /* volatile */
 404
 405 /* Some compilers (many AT&T SVR4 compilers for instance), do not accept
 406    declarations of functions that never return (exit for instance) as
 407    "volatile void".  For such compilers "NORETURN" can be defined away
 408    to keep them happy */
 409
 410 #ifndef NORETURN
 411 # ifdef __lucid
 412 #   define NORETURN /*nothing*/
 413 # else
 414 #   define NORETURN volatile
 415 # endif
 416 #endif
 417
 418 /* Defaults for system-wide constants (if not defined by xm.h, we fake it).  */
 419
 420 #if !defined (UINT_MAX)
 421 #define UINT_MAX 0xffffffff
 422 #endif
 423
 424 #if !defined (LONG_MAX)
 425 #define LONG_MAX 0x7fffffff
 426 #endif
 427
 428 #if !defined (INT_MAX)
 429 #define INT_MAX 0x7fffffff
 430 #endif
 431
 432 #if !defined (INT_MIN)
 433 /* Two's complement, 32 bit.  */
 434 #define INT_MIN -0x80000000
 435 #endif
 436
 437 /* Number of bits in a char or unsigned char for the target machine.
 438    Just like CHAR_BIT in <limits.h> but describes the target machine.  */
 439 #if !defined (TARGET_CHAR_BIT)
 440 #define TARGET_CHAR_BIT 8
 441 #endif
 442
 443 /* Number of bits in a short or unsigned short for the target machine. */
 444 #if !defined (TARGET_SHORT_BIT)
 445 #define TARGET_SHORT_BIT (sizeof (short) * TARGET_CHAR_BIT)
 446 #endif
 447
 448 /* Number of bits in an int or unsigned int for the target machine. */
 449 #if !defined (TARGET_INT_BIT)
 450 #define TARGET_INT_BIT (sizeof (int) * TARGET_CHAR_BIT)
 451 #endif
 452
 453 /* Number of bits in a long or unsigned long for the target machine. */
 454 #if !defined (TARGET_LONG_BIT)
 455 #define TARGET_LONG_BIT (sizeof (long) * TARGET_CHAR_BIT)
 456 #endif
 457
 458 /* Number of bits in a long long or unsigned long long for the target machine. */
 459 #if !defined (TARGET_LONG_LONG_BIT)
 460 #define TARGET_LONG_LONG_BIT (2 * TARGET_LONG_BIT)
 461 #endif
 462
 463 /* Number of bits in a float for the target machine. */
 464 #if !defined (TARGET_FLOAT_BIT)
 465 #define TARGET_FLOAT_BIT (sizeof (float) * TARGET_CHAR_BIT)
 466 #endif
 467
 468 /* Number of bits in a double for the target machine. */
 469 #if !defined (TARGET_DOUBLE_BIT)
 470 #define TARGET_DOUBLE_BIT (sizeof (double) * TARGET_CHAR_BIT)
 471 #endif
 472
 473 /* Number of bits in a long double for the target machine. */
 474 #if !defined (TARGET_LONG_DOUBLE_BIT)
 475 #define TARGET_LONG_DOUBLE_BIT (2 * TARGET_DOUBLE_BIT)
 476 #endif
 477
 478 /* Number of bits in a "complex" for the target machine. */
 479 #if !defined (TARGET_COMPLEX_BIT)
 480 #define TARGET_COMPLEX_BIT (2 * TARGET_FLOAT_BIT)
 481 #endif
 482
 483 /* Number of bits in a "double complex" for the target machine. */
 484 #if !defined (TARGET_DOUBLE_COMPLEX_BIT)
 485 #define TARGET_DOUBLE_COMPLEX_BIT (2 * TARGET_DOUBLE_BIT)
 486 #endif
 487
 488 /* Number of bits in a pointer for the target machine */
 489 #if !defined (TARGET_PTR_BIT)
 490 #define TARGET_PTR_BIT TARGET_INT_BIT
 491 #endif
 492
 493 /* Convert a LONGEST to an int.  This is used in contexts (e.g. number
 494    of arguments to a function, number in a value history, register
 495    number, etc.) where the value must not be larger than can fit
 496    in an int.  */
 497 #if !defined (longest_to_int)
 498 #if defined (LONG_LONG)
 499 #define longest_to_int(x) (((x) > INT_MAX || (x) < INT_MIN) \
 500                            ? (error ("Value out of range."),0) : (int) (x))
 501 #else /* No LONG_LONG.  */
 502 /* Assume sizeof (int) == sizeof (long).  */
 503 #define longest_to_int(x) ((int) (x))
 504 #endif /* No LONG_LONG.  */
 505 #endif /* No longest_to_int.  */
 506
 507 /* This should not be a typedef, because "unsigned LONGEST" needs
 508    to work. LONG_LONG is defined if the host has "long long".  */
 509
 510 #ifndef LONGEST
 511 # ifdef LONG_LONG
 512 #  define LONGEST long long
 513 # else
 514 #  define LONGEST long
 515 # endif
 516 #endif
 517
 518 /* Assorted functions we can declare, now that const and volatile are
 519    defined.  */
 520
 521 extern char *
 522 savestring PARAMS ((const char *, int));
 523
 524 extern char *
 525 msavestring PARAMS ((void *, const char *, int));
 526
 527 extern char *
 528 strsave PARAMS ((const char *));
 529
 530 extern char *
 531 mstrsave PARAMS ((void *, const char *));
 532
 533 extern char *
 534 concat PARAMS ((char *, ...));
 535
 536 extern PTR
 537 xmalloc PARAMS ((long));
 538
 539 extern PTR
 540 xrealloc PARAMS ((PTR, long));
 541
 542 extern PTR
 543 xmmalloc PARAMS ((PTR, long));
 544
 545 extern PTR
 546 xmrealloc PARAMS ((PTR, PTR, long));
 547
 548 extern PTR
 549 mmalloc PARAMS ((PTR, long));
 550
 551 extern PTR
 552 mrealloc PARAMS ((PTR, PTR, long));
 553
 554 extern void
 555 mfree PARAMS ((PTR, PTR));
 556
 557 extern int
 558 mmcheck PARAMS ((PTR, void (*) (void)));
 559
 560 extern int
 561 mmtrace PARAMS ((void));
 562
 563 extern int
 564 parse_escape PARAMS ((char **));
 565
 566 extern const char * const reg_names[];
 567
 568 extern NORETURN void                    /* Does not return to the caller.  */
 569 error ();
 570
 571 extern NORETURN void                    /* Does not return to the caller.  */
 572 fatal ();
 573
 574 extern NORETURN void                    /* Not specified as volatile in ... */
 575 exit PARAMS ((int));                    /* 4.10.4.3 */
 576
 577 extern NORETURN void                    /* Does not return to the caller.  */
 578 nomem PARAMS ((long));
 579
 580 extern NORETURN void                    /* Does not return to the caller.  */
 581 return_to_top_level PARAMS ((void));
 582
 583 extern void
 584 warning_setup PARAMS ((void));
 585
 586 extern void
 587 warning ();
 588
 589 /* Global functions from other, non-gdb GNU thingies (libiberty for
 590    instance) */
 591
 592 extern char *
 593 basename PARAMS ((char *));
 594
 595 extern char *
 596 getenv PARAMS ((const char *));
 597
 598 extern char **
 599 buildargv PARAMS ((char *));
 600
 601 extern void
 602 freeargv PARAMS ((char **));
 603
 604 extern char *
 605 strerrno PARAMS ((int));
 606
 607 extern char *
 608 strsigno PARAMS ((int));
 609
 610 extern int
 611 errno_max PARAMS ((void));
 612
 613 extern int
 614 signo_max PARAMS ((void));
 615
 616 extern int
 617 strtoerrno PARAMS ((char *));
 618
 619 extern int
 620 strtosigno PARAMS ((char *));
 621
 622 extern char *
 623 strsignal PARAMS ((int));
 624
 625 /* From other system libraries */
 626
 627 #ifndef PSIGNAL_IN_SIGNAL_H
 628 extern void
 629 psignal PARAMS ((unsigned, char *));
 630 #endif
 631
 632 /* For now, we can't include <stdlib.h> because it conflicts with
 633    "../include/getopt.h".  (FIXME)
 634
 635    However, if a function is defined in the ANSI C standard and a prototype
 636    for that function is defined and visible in any header file in an ANSI
 637    conforming environment, then that prototype must match the definition in
 638    the ANSI standard.  So we can just duplicate them here without conflict,
 639    since they must be the same in all conforming ANSI environments.  If
 640    these cause problems, then the environment is not ANSI conformant. */
 641
 642 #ifdef __STDC__
 643 #include <stddef.h>
 644 #endif
 645
 646 extern int
 647 fclose PARAMS ((FILE *stream));                         /* 4.9.5.1 */
 648
 649 extern void
 650 perror PARAMS ((const char *));                         /* 4.9.10.4 */
 651
 652 extern double
 653 atof PARAMS ((const char *nptr));                       /* 4.10.1.1 */
 654
 655 extern int
 656 atoi PARAMS ((const char *));                           /* 4.10.1.2 */
 657
 658 #ifndef MALLOC_INCOMPATIBLE
 659
 660 extern PTR
 661 malloc PARAMS ((size_t size));                          /* 4.10.3.3 */
 662
 663 extern PTR
 664 realloc PARAMS ((void *ptr, size_t size));              /* 4.10.3.4 */
 665
 666 extern void
 667 free PARAMS ((void *));                                 /* 4.10.3.2 */
 668
 669 #endif  /* MALLOC_INCOMPATIBLE */
 670
 671 extern void
 672 qsort PARAMS ((void *base, size_t nmemb,                /* 4.10.5.2 */
 673                size_t size,
 674                int (*comp)(const void *, const void *)));
 675
 676 #ifndef MEM_FNS_DECLARED        /* Some non-ANSI use void *, not char *.  */
 677 extern PTR
 678 memcpy PARAMS ((void *, const void *, size_t));         /* 4.11.2.1 */
 679 #endif
 680
 681 extern int
 682 memcmp PARAMS ((const void *, const void *, size_t));   /* 4.11.4.1 */
 683
 684 extern char *
 685 strchr PARAMS ((const char *, int));                    /* 4.11.5.2 */
 686
 687 extern char *
 688 strrchr PARAMS ((const char *, int));                   /* 4.11.5.5 */
 689
 690 extern char *
 691 strstr PARAMS ((const char *, const char *));           /* 4.11.5.7 */
 692
 693 extern char *
 694 strtok PARAMS ((char *, const char *));                 /* 4.11.5.8 */
 695
 696 #ifndef MEM_FNS_DECLARED        /* Some non-ANSI use void *, not char *.  */
 697 extern PTR
 698 memset PARAMS ((void *, int, size_t));                  /* 4.11.6.1 */
 699 #endif
 700
 701 extern char *
 702 strerror PARAMS ((int));                                /* 4.11.6.2 */
 703
 704 /* Various possibilities for alloca.  */
 705 #ifndef alloca
 706 # ifdef __GNUC__
 707 #  define alloca __builtin_alloca
 708 # else
 709 #  ifdef sparc
 710 #   include <alloca.h>          /* NOTE:  Doesn't declare alloca() */
 711 #  endif
 712 #  ifdef __STDC__
 713    extern void *alloca (size_t);
 714 #  else /* __STDC__ */
 715    extern char *alloca ();
 716 #  endif
 717 # endif
 718 #endif
 719
 720 /* TARGET_BYTE_ORDER and HOST_BYTE_ORDER must be defined to one of these.  */
 721
 722 #if !defined (BIG_ENDIAN)
 723 #define BIG_ENDIAN 4321
 724 #endif
 725
 726 #if !defined (LITTLE_ENDIAN)
 727 #define LITTLE_ENDIAN 1234
 728 #endif
 729
 730 /* Target-system-dependent parameters for GDB.
 731
 732    The standard thing is to include defs.h.  However, files that are
 733    specific to a particular target can define TM_FILE_OVERRIDE before
 734    including defs.h, then can include any particular tm-file they desire.  */
 735
 736 /* Target machine definition.  This will be a symlink to one of the
 737    tm-*.h files, built by the `configure' script.  */
 738
 739 #ifndef TM_FILE_OVERRIDE
 740 #include "tm.h"
 741 #endif
 742
 743 /* The bit byte-order has to do just with numbering of bits in
 744    debugging symbols and such.  Conceptually, it's quite separate
 745    from byte/word byte order.  */
 746
 747 #if !defined (BITS_BIG_ENDIAN)
 748 #if TARGET_BYTE_ORDER == BIG_ENDIAN
 749 #define BITS_BIG_ENDIAN 1
 750 #endif /* Big endian.  */
 751
 752 #if TARGET_BYTE_ORDER == LITTLE_ENDIAN
 753 #define BITS_BIG_ENDIAN 0
 754 #endif /* Little endian.  */
 755 #endif /* BITS_BIG_ENDIAN not defined.  */
 756
 757 /* Swap LEN bytes at BUFFER between target and host byte-order.  */
 758 #if TARGET_BYTE_ORDER == HOST_BYTE_ORDER
 759 #define SWAP_TARGET_AND_HOST(buffer,len)
 760 #else /* Target and host byte order differ.  */
 761 #define SWAP_TARGET_AND_HOST(buffer,len) \
 762   {                                                                      \
 763     char tmp;                                                            \
 764     char *p = (char *)(buffer);                                          \
 765     char *q = ((char *)(buffer)) + len - 1;                              \
 766     for (; p < q; p++, q--)                                              \
 767       {                                                                  \
 768         tmp = *q;                                                        \
 769         *q = *p;                                                         \
 770         *p = tmp;                                                        \
 771       }                                                                  \
 772   }
 773 #endif /* Target and host byte order differ.  */
 774
 775 /* On some machines there are bits in addresses which are not really
 776    part of the address, but are used by the kernel, the hardware, etc.
 777    for special purposes.  ADDR_BITS_REMOVE takes out any such bits
 778    so we get a "real" address such as one would find in a symbol
 779    table.  ADDR_BITS_SET sets those bits the way the system wants
 780    them.  */
 781 #if !defined (ADDR_BITS_REMOVE)
 782 #define ADDR_BITS_REMOVE(addr) (addr)
 783 #define ADDR_BITS_SET(addr) (addr)
 784 #endif /* No ADDR_BITS_REMOVE.  */
 785
 786 /* From valops.c */
 787
 788 extern CORE_ADDR
 789 push_bytes PARAMS ((CORE_ADDR, char *, int));
 790
 791 /* In some modules, we don't have a definition of REGISTER_TYPE yet, so we
 792    must avoid prototyping this function for now.  FIXME.  Should be:
 793 extern CORE_ADDR
 794 push_word PARAMS ((CORE_ADDR, REGISTER_TYPE));
 795  */
 796 extern CORE_ADDR
 797 push_word ();
 798
 799 /* Some parts of gdb might be considered optional, in the sense that they
 800    are not essential for being able to build a working, usable debugger
 801    for a specific environment.  For example, the maintenance commands
 802    are there for the benefit of gdb maintainers.  As another example,
 803    some environments really don't need gdb's that are able to read N
 804    different object file formats.  In order to make it possible (but
 805    not necessarily recommended) to build "stripped down" versions of
 806    gdb, the following defines control selective compilation of those
 807    parts of gdb which can be safely left out when necessary.  Note that
 808    the default is to include everything. */
 809
 810 #ifndef MAINTENANCE_CMDS
 811 #define MAINTENANCE_CMDS 1
 812 #endif
 813
 814 #include "energize.h"
 815
 816 #endif /* !defined (DEFS_H) */