gdb/defs.h

   1 /* Basic, host-specific, and target-specific definitions for GDB.
   2    Copyright (C) 1986, 1989, 1991, 1992, 1993, 1994, 1995
   3    Free Software Foundation, Inc.
   4
   5 This file is part of GDB.
   6
   7 This program is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2 of the License, or
  10 (at your option) any later version.
  11
  12 This program is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with this program; if not, write to the Free Software
  19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
  20
  21 #ifndef DEFS_H
  22 #define DEFS_H
  23
  24 #include <stdio.h>
  25
  26 /* First include ansidecl.h so we can use the various macro definitions
  27    here and in all subsequent file inclusions.  */
  28
  29 #include "ansidecl.h"
  30
  31 #include "libiberty.h"
  32
  33 /* libiberty.h can't declare this one, but evidently we can.  */
  34 extern char *strsignal PARAMS ((int));
  35
  36 #include "progress.h"
  37
  38 #include "mmalloc.h"
  39
  40 /* For BFD64 and bfd_vma.  */
  41 #include "bfd.h"
  42
  43 /* An address in the program being debugged.  Host byte order.  Rather
  44    than duplicate all the logic in BFD which figures out what type
  45    this is (long, long long, etc.) and whether it needs to be 64
  46    bits (the host/target interactions are subtle), we just use
  47    bfd_vma.  */
  48
  49 typedef bfd_vma CORE_ADDR;
  50
  51 #define min(a, b) ((a) < (b) ? (a) : (b))
  52 #define max(a, b) ((a) > (b) ? (a) : (b))
  53
  54 /* Gdb does *lots* of string compares.  Use macros to speed them up by
  55    avoiding function calls if the first characters are not the same. */
  56
  57 #define STRCMP(a,b) (*(a) == *(b) ? strcmp ((a), (b)) : (int)*(a) - (int)*(b))
  58 #define STREQ(a,b) (*(a) == *(b) ? !strcmp ((a), (b)) : 0)
  59 #define STREQN(a,b,c) (*(a) == *(b) ? !strncmp ((a), (b), (c)) : 0)
  60
  61 /* The character GNU C++ uses to build identifiers that must be unique from
  62    the program's identifiers (such as $this and $$vptr).  */
  63 #define CPLUS_MARKER '$'        /* May be overridden to '.' for SysV */
  64
  65 #include <errno.h>              /* System call error return status */
  66
  67 extern int quit_flag;
  68 extern int immediate_quit;
  69 extern int sevenbit_strings;
  70
  71 extern void quit PARAMS ((void));
  72
  73 #define QUIT { \
  74   if (quit_flag) quit (); \
  75   if (interactive_hook) interactive_hook (); \
  76   PROGRESS (1); \
  77 }
  78
  79 /* Command classes are top-level categories into which commands are broken
  80    down for "help" purposes.
  81    Notes on classes: class_alias is for alias commands which are not
  82    abbreviations of the original command.  class-pseudo is for commands
  83    which are not really commands nor help topics ("stop").  */
  84
  85 enum command_class
  86 {
  87   /* Special args to help_list */
  88   all_classes = -2, all_commands = -1,
  89   /* Classes of commands */
  90   no_class = -1, class_run = 0, class_vars, class_stack,
  91   class_files, class_support, class_info, class_breakpoint,
  92   class_alias, class_obscure, class_user, class_maintenance,
  93   class_pseudo
  94 };
  95
  96 /* Languages represented in the symbol table and elsewhere.
  97    This should probably be in language.h, but since enum's can't
  98    be forward declared to satisfy opaque references before their
  99    actual definition, needs to be here. */
 100
 101 enum language
 102 {
 103    language_unknown,            /* Language not known */
 104    language_auto,               /* Placeholder for automatic setting */
 105    language_c,                  /* C */
 106    language_cplus,              /* C++ */
 107    language_chill,              /* Chill */
 108    language_fortran,            /* Fortran */
 109    language_m2,                 /* Modula-2 */
 110    language_asm                 /* Assembly language */
 111 };
 112
 113 /* the cleanup list records things that have to be undone
 114    if an error happens (descriptors to be closed, memory to be freed, etc.)
 115    Each link in the chain records a function to call and an
 116    argument to give it.
 117
 118    Use make_cleanup to add an element to the cleanup chain.
 119    Use do_cleanups to do all cleanup actions back to a given
 120    point in the chain.  Use discard_cleanups to remove cleanups
 121    from the chain back to a given point, not doing them.  */
 122
 123 struct cleanup
 124 {
 125   struct cleanup *next;
 126   void (*function) PARAMS ((PTR));
 127   PTR arg;
 128 };
 129
 130 /* Needed for various prototypes */
 131
 132 #ifdef __STDC__
 133 struct symtab;
 134 struct breakpoint;
 135 #endif
 136
 137 /* From blockframe.c */
 138
 139 extern int inside_entry_func PARAMS ((CORE_ADDR));
 140
 141 extern int inside_entry_file PARAMS ((CORE_ADDR addr));
 142
 143 extern int inside_main_func PARAMS ((CORE_ADDR pc));
 144
 145 /* From ch-lang.c, for the moment. (FIXME) */
 146
 147 extern char *chill_demangle PARAMS ((const char *));
 148
 149 /* From utils.c */
 150
 151 extern int strcmp_iw PARAMS ((const char *, const char *));
 152
 153 extern char *safe_strerror PARAMS ((int));
 154
 155 extern char *safe_strsignal PARAMS ((int));
 156
 157 extern void init_malloc PARAMS ((void *));
 158
 159 extern void request_quit PARAMS ((int));
 160
 161 extern void do_cleanups PARAMS ((struct cleanup *));
 162
 163 extern void discard_cleanups PARAMS ((struct cleanup *));
 164
 165 /* The bare make_cleanup function is one of those rare beasts that
 166    takes almost any type of function as the first arg and anything that
 167    will fit in a "void *" as the second arg.
 168
 169    Should be, once all calls and called-functions are cleaned up:
 170 extern struct cleanup *
 171 make_cleanup PARAMS ((void (*function) (void *), void *));
 172
 173    Until then, lint and/or various type-checking compiler options will
 174    complain about make_cleanup calls.  It'd be wrong to just cast things,
 175    since the type actually passed when the function is called would be
 176    wrong.  */
 177
 178 extern struct cleanup *make_cleanup ();
 179
 180 extern struct cleanup *save_cleanups PARAMS ((void));
 181
 182 extern void restore_cleanups PARAMS ((struct cleanup *));
 183
 184 extern void free_current_contents PARAMS ((char **));
 185
 186 extern void null_cleanup PARAMS ((char **));
 187
 188 extern int myread PARAMS ((int, char *, int));
 189
 190 extern int query ();
 191 \f
 192 /* Annotation stuff.  */
 193
 194 extern int annotation_level; /* in stack.c */
 195 \f
 196 extern void begin_line PARAMS ((void));
 197
 198 extern void wrap_here PARAMS ((char *));
 199
 200 extern void reinitialize_more_filter PARAMS ((void));
 201
 202 typedef FILE GDB_FILE;
 203 #define gdb_stdout stdout
 204 #define gdb_stderr stderr
 205
 206 extern void gdb_flush PARAMS ((GDB_FILE *));
 207
 208 extern GDB_FILE *gdb_fopen PARAMS ((char * name, char * mode));
 209
 210 extern void fputs_filtered PARAMS ((const char *, GDB_FILE *));
 211
 212 extern void fputs_unfiltered PARAMS ((const char *, GDB_FILE *));
 213
 214 extern int fputc_unfiltered PARAMS ((int c, GDB_FILE *));
 215
 216 extern int putchar_unfiltered PARAMS ((int c));
 217
 218 extern void puts_filtered PARAMS ((char *));
 219
 220 extern void puts_unfiltered PARAMS ((char *));
 221
 222 extern void vprintf_filtered ();
 223
 224 extern void vfprintf_filtered ();
 225
 226 extern void fprintf_filtered ();
 227
 228 extern void fprintfi_filtered ();
 229
 230 extern void printf_filtered ();
 231
 232 extern void printfi_filtered ();
 233
 234 extern void vprintf_unfiltered ();
 235
 236 extern void vfprintf_unfiltered ();
 237
 238 extern void fprintf_unfiltered ();
 239
 240 extern void printf_unfiltered ();
 241
 242 extern void print_spaces PARAMS ((int, GDB_FILE *));
 243
 244 extern void print_spaces_filtered PARAMS ((int, GDB_FILE *));
 245
 246 extern char *n_spaces PARAMS ((int));
 247
 248 extern void gdb_printchar PARAMS ((int, GDB_FILE *, int));
 249
 250 extern void gdb_print_address PARAMS ((void *, GDB_FILE *));
 251
 252 extern void fprintf_symbol_filtered PARAMS ((GDB_FILE *, char *,
 253                                              enum language, int));
 254
 255 extern void perror_with_name PARAMS ((char *));
 256
 257 extern void print_sys_errmsg PARAMS ((char *, int));
 258
 259 /* From regex.c or libc.  BSD 4.4 declares this with the argument type as
 260    "const char *" in unistd.h, so we can't declare the argument
 261    as "char *".  */
 262
 263 extern char *re_comp PARAMS ((const char *));
 264
 265 /* From symfile.c */
 266
 267 extern void symbol_file_command PARAMS ((char *, int));
 268
 269 /* From top.c */
 270
 271 extern char *skip_quoted PARAMS ((char *));
 272
 273 extern char *gdb_readline PARAMS ((char *));
 274
 275 extern char *command_line_input PARAMS ((char *, int, char *));
 276
 277 extern void print_prompt PARAMS ((void));
 278
 279 extern int input_from_terminal_p PARAMS ((void));
 280
 281 extern int info_verbose;
 282
 283 /* From printcmd.c */
 284
 285 extern void set_next_address PARAMS ((CORE_ADDR));
 286
 287 extern void print_address_symbolic PARAMS ((CORE_ADDR, GDB_FILE *, int,
 288                                             char *));
 289
 290 extern void print_address_numeric PARAMS ((CORE_ADDR, int, GDB_FILE *));
 291
 292 extern void print_address PARAMS ((CORE_ADDR, GDB_FILE *));
 293
 294 /* From source.c */
 295
 296 extern int openp PARAMS ((char *, int, char *, int, int, char **));
 297
 298 extern void mod_path PARAMS ((char *, char **));
 299
 300 extern void directory_command PARAMS ((char *, int));
 301
 302 extern void init_source_path PARAMS ((void));
 303
 304 extern char *symtab_to_filename PARAMS ((struct symtab *));
 305
 306 /* From findvar.c */
 307
 308 extern int read_relative_register_raw_bytes PARAMS ((int, char *));
 309
 310 /* From readline (but not in any readline .h files).  */
 311
 312 extern char *tilde_expand PARAMS ((char *));
 313
 314 /* Control types for commands */
 315
 316 enum misc_command_type
 317 {
 318   ok_command,
 319   end_command,
 320   else_command,
 321   nop_command
 322 };
 323
 324 enum command_control_type
 325 {
 326   simple_control,
 327   break_control,
 328   continue_control,
 329   while_control,
 330   if_control,
 331   invalid_control
 332 };
 333
 334 /* Structure for saved commands lines
 335    (for breakpoints, defined commands, etc).  */
 336
 337 struct command_line
 338 {
 339   struct command_line *next;
 340   char *line;
 341   enum command_control_type control_type;
 342   int body_count;
 343   struct command_line **body_list;
 344 };
 345
 346 extern struct command_line *read_command_lines PARAMS ((void));
 347
 348 extern void free_command_lines PARAMS ((struct command_line **));
 349
 350 /* String containing the current directory (what getwd would return).  */
 351
 352 extern char *current_directory;
 353
 354 /* Default radixes for input and output.  Only some values supported.  */
 355 extern unsigned input_radix;
 356 extern unsigned output_radix;
 357
 358 /* Possibilities for prettyprint parameters to routines which print
 359    things.  Like enum language, this should be in value.h, but needs
 360    to be here for the same reason.  FIXME:  If we can eliminate this
 361    as an arg to LA_VAL_PRINT, then we can probably move it back to
 362    value.h. */
 363
 364 enum val_prettyprint
 365 {
 366   Val_no_prettyprint = 0,
 367   Val_prettyprint,
 368   /* Use the default setting which the user has specified.  */
 369   Val_pretty_default
 370 };
 371
 372 \f
 373 /* Host machine definition.  This will be a symlink to one of the
 374    xm-*.h files, built by the `configure' script.  */
 375
 376 #include "xm.h"
 377
 378 /* Native machine support.  This will be a symlink to one of the
 379    nm-*.h files, built by the `configure' script.  */
 380
 381 #include "nm.h"
 382
 383 /* Target machine definition.  This will be a symlink to one of the
 384    tm-*.h files, built by the `configure' script.  */
 385
 386 #include "tm.h"
 387
 388 /* If the xm.h file did not define the mode string used to open the
 389    files, assume that binary files are opened the same way as text
 390    files */
 391 #ifndef FOPEN_RB
 392 #include "fopen-same.h"
 393 #endif
 394
 395 /*
 396  * Allow things in gdb to be declared "const".  If compiling ANSI, it
 397  * just works.  If compiling with gcc but non-ansi, redefine to __const__.
 398  * If non-ansi, non-gcc, then eliminate "const" entirely, making those
 399  * objects be read-write rather than read-only.
 400  */
 401
 402 #ifndef const
 403 #ifndef __STDC__
 404 # ifdef __GNUC__
 405 #  define const __const__
 406 # else
 407 #  define const /*nothing*/
 408 # endif /* GNUC */
 409 #endif /* STDC */
 410 #endif /* const */
 411
 412 #ifndef volatile
 413 #ifndef __STDC__
 414 # ifdef __GNUC__
 415 #  define volatile __volatile__
 416 # else
 417 #  define volatile /*nothing*/
 418 # endif /* GNUC */
 419 #endif /* STDC */
 420 #endif /* volatile */
 421
 422 /* The ability to declare that a function never returns is useful, but
 423    not really required to compile GDB successfully, so the NORETURN and
 424    ATTR_NORETURN macros normally expand into nothing.  */
 425
 426 /* If compiling with older versions of GCC, a function may be declared
 427    "volatile" to indicate that it does not return.  */
 428
 429 #ifndef NORETURN
 430 # if defined(__GNUC__) \
 431      && (__GNUC__ == 1 || (__GNUC__ == 2 && __GNUC_MINOR__ < 5))
 432 #  define NORETURN volatile
 433 # else
 434 #  define NORETURN /* nothing */
 435 # endif
 436 #endif
 437
 438 /* GCC 2.5 and later versions define a function attribute "noreturn",
 439    which is the preferred way to declare that a function never returns.  */
 440
 441 #ifndef ATTR_NORETURN
 442 # if defined(__GNUC__) && __GNUC__ >= 2 && __GNUC_MINOR__ >= 5
 443 #  define ATTR_NORETURN __attribute__ ((noreturn))
 444 # else
 445 #  define ATTR_NORETURN /* nothing */
 446 # endif
 447 #endif
 448
 449 /* Defaults for system-wide constants (if not defined by xm.h, we fake it).  */
 450
 451 #if !defined (UINT_MAX)
 452 #define UINT_MAX ((unsigned int)(~0))           /* 0xFFFFFFFF for 32-bits */
 453 #endif
 454
 455 #if !defined (INT_MAX)
 456 #define INT_MAX ((int)(UINT_MAX >> 1))          /* 0x7FFFFFFF for 32-bits */
 457 #endif
 458
 459 #if !defined (INT_MIN)
 460 #define INT_MIN (-INT_MAX - 1)                  /* 0x80000000 for 32-bits */
 461 #endif
 462
 463 #if !defined (ULONG_MAX)
 464 #define ULONG_MAX ((unsigned long)(~0L))        /* 0xFFFFFFFF for 32-bits */
 465 #endif
 466
 467 #if !defined (LONG_MAX)
 468 #define LONG_MAX ((long)(ULONG_MAX >> 1))       /* 0x7FFFFFFF for 32-bits */
 469 #endif
 470
 471 #ifdef BFD64
 472
 473 /* This is to make sure that LONGEST is at least as big as CORE_ADDR.  */
 474
 475 #define LONGEST BFD_HOST_64_BIT
 476
 477 #else /* No BFD64 */
 478
 479 /* If all compilers for this host support "long long" and we want to
 480    use it for LONGEST (the performance hit is about 10% on a testsuite
 481    run based on one DECstation test), then the xm.h file can define
 482    CC_HAS_LONG_LONG.
 483
 484    Using GCC 1.39 on BSDI with long long causes about 700 new
 485    testsuite failures.  Using long long for LONGEST on the DECstation
 486    causes 3 new FAILs in the testsuite and many heuristic fencepost
 487    warnings.  These are not investigated, but a first guess would be
 488    that the BSDI problems are GCC bugs in long long support and the
 489    latter are GDB bugs.  */
 490
 491 #ifndef CC_HAS_LONG_LONG
 492 #  if defined (__GNUC__) && defined (FORCE_LONG_LONG)
 493 #    define CC_HAS_LONG_LONG 1
 494 #  endif
 495 #endif
 496
 497 /* LONGEST should not be a typedef, because "unsigned LONGEST" needs to work.
 498    CC_HAS_LONG_LONG is defined if the host compiler supports "long long"
 499    variables and we wish to make use of that support.  */
 500
 501 #ifndef LONGEST
 502 #  ifdef CC_HAS_LONG_LONG
 503 #    define LONGEST long long
 504 #  else
 505 #    define LONGEST long
 506 #  endif
 507 #endif
 508
 509 #endif /* No BFD64 */
 510
 511 /* Convert a LONGEST to an int.  This is used in contexts (e.g. number of
 512    arguments to a function, number in a value history, register number, etc.)
 513    where the value must not be larger than can fit in an int.  */
 514
 515 extern int longest_to_int PARAMS ((LONGEST));
 516
 517 /* Assorted functions we can declare, now that const and volatile are
 518    defined.  */
 519
 520 extern char *savestring PARAMS ((const char *, int));
 521
 522 extern char *msavestring PARAMS ((void *, const char *, int));
 523
 524 extern char *strsave PARAMS ((const char *));
 525
 526 extern char *mstrsave PARAMS ((void *, const char *));
 527
 528 extern PTR xmalloc PARAMS ((long));
 529
 530 extern PTR xrealloc PARAMS ((PTR, long));
 531
 532 extern PTR xmmalloc PARAMS ((PTR, long));
 533
 534 extern PTR xmrealloc PARAMS ((PTR, PTR, long));
 535
 536 extern int parse_escape PARAMS ((char **));
 537
 538 extern char *reg_names[];
 539
 540 /* Message to be printed before the error message, when an error occurs.  */
 541
 542 extern char *error_pre_print;
 543
 544 /* Message to be printed before the error message, when an error occurs.  */
 545
 546 extern char *quit_pre_print;
 547
 548 /* Message to be printed before the warning message, when a warning occurs.  */
 549
 550 extern char *warning_pre_print;
 551
 552 extern NORETURN void error () ATTR_NORETURN;
 553
 554 extern void error_begin PARAMS ((void));
 555
 556 extern NORETURN void fatal () ATTR_NORETURN;
 557
 558 extern NORETURN void nomem PARAMS ((long)) ATTR_NORETURN;
 559
 560 /* Reasons for calling return_to_top_level.  */
 561 enum return_reason {
 562   /* User interrupt.  */
 563   RETURN_QUIT,
 564
 565   /* Any other error.  */
 566   RETURN_ERROR
 567 };
 568
 569 #define RETURN_MASK_QUIT (1 << (int)RETURN_QUIT)
 570 #define RETURN_MASK_ERROR (1 << (int)RETURN_ERROR)
 571 #define RETURN_MASK_ALL (RETURN_MASK_QUIT | RETURN_MASK_ERROR)
 572 typedef int return_mask;
 573
 574 extern NORETURN void
 575 return_to_top_level PARAMS ((enum return_reason)) ATTR_NORETURN;
 576
 577 extern int
 578 catch_errors PARAMS ((int (*) (char *), void *, char *, return_mask));
 579
 580 extern void warning_begin PARAMS ((void));
 581
 582 extern void warning ();
 583
 584 /* Global functions from other, non-gdb GNU thingies.
 585    Libiberty thingies are no longer declared here.  We include libiberty.h
 586    above, instead.  */
 587
 588 extern char *getenv PARAMS ((const char *));
 589
 590 /* From other system libraries */
 591
 592 #ifdef __STDC__
 593 #include <stddef.h>
 594 #include <stdlib.h>
 595 #endif
 596
 597 extern int fclose ();
 598
 599 #ifndef atof
 600 extern double atof ();
 601 #endif
 602
 603 #ifndef MALLOC_INCOMPATIBLE
 604
 605 extern PTR malloc ();
 606
 607 extern PTR realloc ();
 608
 609 extern void free ();
 610
 611 #endif /* MALLOC_INCOMPATIBLE */
 612
 613 extern char *strchr ();
 614
 615 extern char *strrchr ();
 616
 617 extern char *strstr ();
 618
 619 extern char *strtok ();
 620
 621 extern char *strerror ();
 622
 623 /* Various possibilities for alloca.  */
 624 #ifndef alloca
 625 # ifdef __GNUC__
 626 #  define alloca __builtin_alloca
 627 # else /* Not GNU C */
 628 #  ifdef sparc
 629 #   include <alloca.h>          /* NOTE:  Doesn't declare alloca() */
 630 #  endif
 631
 632 /* We need to be careful not to declare this in a way which conflicts with
 633    bison.  Bison never declares it as char *, but under various circumstances
 634    (like __hpux) we need to use void *.  */
 635 #  if defined (__STDC__) || defined (__hpux)
 636    extern void *alloca ();
 637 #  else /* Don't use void *.  */
 638    extern char *alloca ();
 639 #  endif /* Don't use void *.  */
 640 # endif /* Not GNU C */
 641 #endif /* alloca not defined */
 642
 643 /* HOST_BYTE_ORDER must be defined to one of these.  */
 644
 645 #if !defined (BIG_ENDIAN)
 646 #define BIG_ENDIAN 4321
 647 #endif
 648
 649 #if !defined (LITTLE_ENDIAN)
 650 #define LITTLE_ENDIAN 1234
 651 #endif
 652
 653 /* Target-system-dependent parameters for GDB. */
 654
 655 #ifdef TARGET_BYTE_ORDER_SELECTABLE
 656 /* The target endianness is selectable at runtime.  Define
 657    TARGET_BYTE_ORDER to be a variable.  The user can use the `set
 658    endian' command to change it.  */
 659 #undef TARGET_BYTE_ORDER
 660 #define TARGET_BYTE_ORDER target_byte_order
 661 extern int target_byte_order;
 662 #endif
 663
 664 extern void set_endian_from_file PARAMS ((bfd *));
 665
 666 /* Number of bits in a char or unsigned char for the target machine.
 667    Just like CHAR_BIT in <limits.h> but describes the target machine.  */
 668 #if !defined (TARGET_CHAR_BIT)
 669 #define TARGET_CHAR_BIT 8
 670 #endif
 671
 672 /* Number of bits in a short or unsigned short for the target machine. */
 673 #if !defined (TARGET_SHORT_BIT)
 674 #define TARGET_SHORT_BIT (2 * TARGET_CHAR_BIT)
 675 #endif
 676
 677 /* Number of bits in an int or unsigned int for the target machine. */
 678 #if !defined (TARGET_INT_BIT)
 679 #define TARGET_INT_BIT (4 * TARGET_CHAR_BIT)
 680 #endif
 681
 682 /* Number of bits in a long or unsigned long for the target machine. */
 683 #if !defined (TARGET_LONG_BIT)
 684 #define TARGET_LONG_BIT (4 * TARGET_CHAR_BIT)
 685 #endif
 686
 687 /* Number of bits in a long long or unsigned long long for the target machine. */
 688 #if !defined (TARGET_LONG_LONG_BIT)
 689 #define TARGET_LONG_LONG_BIT (2 * TARGET_LONG_BIT)
 690 #endif
 691
 692 /* Number of bits in a float for the target machine. */
 693 #if !defined (TARGET_FLOAT_BIT)
 694 #define TARGET_FLOAT_BIT (4 * TARGET_CHAR_BIT)
 695 #endif
 696
 697 /* Number of bits in a double for the target machine. */
 698 #if !defined (TARGET_DOUBLE_BIT)
 699 #define TARGET_DOUBLE_BIT (8 * TARGET_CHAR_BIT)
 700 #endif
 701
 702 /* Number of bits in a long double for the target machine.  */
 703 #if !defined (TARGET_LONG_DOUBLE_BIT)
 704 #define TARGET_LONG_DOUBLE_BIT (2 * TARGET_DOUBLE_BIT)
 705 #endif
 706
 707 /* Number of bits in a pointer for the target machine */
 708 #if !defined (TARGET_PTR_BIT)
 709 #define TARGET_PTR_BIT TARGET_INT_BIT
 710 #endif
 711
 712 /* If we picked up a copy of CHAR_BIT from a configuration file
 713    (which may get it by including <limits.h>) then use it to set
 714    the number of bits in a host char.  If not, use the same size
 715    as the target. */
 716
 717 #if defined (CHAR_BIT)
 718 #define HOST_CHAR_BIT CHAR_BIT
 719 #else
 720 #define HOST_CHAR_BIT TARGET_CHAR_BIT
 721 #endif
 722
 723 /* The bit byte-order has to do just with numbering of bits in
 724    debugging symbols and such.  Conceptually, it's quite separate
 725    from byte/word byte order.  */
 726
 727 #if !defined (BITS_BIG_ENDIAN)
 728 #ifndef TARGET_BYTE_ORDER_SELECTABLE
 729
 730 #if TARGET_BYTE_ORDER == BIG_ENDIAN
 731 #define BITS_BIG_ENDIAN 1
 732 #endif /* Big endian.  */
 733
 734 #if TARGET_BYTE_ORDER == LITTLE_ENDIAN
 735 #define BITS_BIG_ENDIAN 0
 736 #endif /* Little endian.  */
 737
 738 #else /* defined (TARGET_BYTE_ORDER_SELECTABLE) */
 739
 740 #define BITS_BIG_ENDIAN (TARGET_BYTE_ORDER == BIG_ENDIAN)
 741
 742 #endif /* defined (TARGET_BYTE_ORDER_SELECTABLE) */
 743 #endif /* BITS_BIG_ENDIAN not defined.  */
 744
 745 /* In findvar.c.  */
 746
 747 extern LONGEST extract_signed_integer PARAMS ((void *, int));
 748
 749 extern unsigned LONGEST extract_unsigned_integer PARAMS ((void *, int));
 750
 751 extern CORE_ADDR extract_address PARAMS ((void *, int));
 752
 753 extern void store_signed_integer PARAMS ((void *, int, LONGEST));
 754
 755 extern void store_unsigned_integer PARAMS ((void *, int, unsigned LONGEST));
 756
 757 extern void store_address PARAMS ((void *, int, CORE_ADDR));
 758
 759 extern double extract_floating PARAMS ((void *, int));
 760
 761 extern void store_floating PARAMS ((void *, int, double));
 762 \f
 763 /* On some machines there are bits in addresses which are not really
 764    part of the address, but are used by the kernel, the hardware, etc.
 765    for special purposes.  ADDR_BITS_REMOVE takes out any such bits
 766    so we get a "real" address such as one would find in a symbol
 767    table.  This is used only for addresses of instructions, and even then
 768    I'm not sure it's used in all contexts.  It exists to deal with there
 769    being a few stray bits in the PC which would mislead us, not as some sort
 770    of generic thing to handle alignment or segmentation (it's possible it
 771    should be in TARGET_READ_PC instead).  */
 772 #if !defined (ADDR_BITS_REMOVE)
 773 #define ADDR_BITS_REMOVE(addr) (addr)
 774 #endif /* No ADDR_BITS_REMOVE.  */
 775
 776 /* From valops.c */
 777
 778 extern CORE_ADDR push_bytes PARAMS ((CORE_ADDR, char *, int));
 779
 780 extern CORE_ADDR push_word PARAMS ((CORE_ADDR, unsigned LONGEST));
 781
 782 /* Some parts of gdb might be considered optional, in the sense that they
 783    are not essential for being able to build a working, usable debugger
 784    for a specific environment.  For example, the maintenance commands
 785    are there for the benefit of gdb maintainers.  As another example,
 786    some environments really don't need gdb's that are able to read N
 787    different object file formats.  In order to make it possible (but
 788    not necessarily recommended) to build "stripped down" versions of
 789    gdb, the following defines control selective compilation of those
 790    parts of gdb which can be safely left out when necessary.  Note that
 791    the default is to include everything. */
 792
 793 #ifndef MAINTENANCE_CMDS
 794 #define MAINTENANCE_CMDS 1
 795 #endif
 796
 797 #include "dis-asm.h"            /* Get defs for disassemble_info */
 798
 799 extern int dis_asm_read_memory PARAMS ((bfd_vma memaddr, bfd_byte *myaddr,
 800                                         int len, disassemble_info *info));
 801
 802 extern void dis_asm_memory_error PARAMS ((int status, bfd_vma memaddr,
 803                                           disassemble_info *info));
 804
 805 extern void dis_asm_print_address PARAMS ((bfd_vma addr,
 806                                            disassemble_info *info));
 807
 808 extern int (*tm_print_insn) PARAMS ((bfd_vma, disassemble_info*));
 809
 810 /* Hooks for alternate command interfaces.  */
 811
 812 #ifdef __STDC__
 813 struct target_waitstatus;
 814 struct cmd_list_element;
 815 #endif
 816
 817 extern void (*init_ui_hook) PARAMS ((void));
 818 extern void (*command_loop_hook) PARAMS ((void));
 819 extern void (*fputs_unfiltered_hook) PARAMS ((const char *linebuffer,
 820                                               FILE *stream));
 821 extern void (*print_frame_info_listing_hook) PARAMS ((struct symtab *s,
 822                                                       int line, int stopline,
 823                                                       int noerror));
 824 extern int (*query_hook) PARAMS (());
 825 extern void (*flush_hook) PARAMS ((FILE *stream));
 826 extern void (*create_breakpoint_hook) PARAMS ((struct breakpoint *b));
 827 extern void (*delete_breakpoint_hook) PARAMS ((struct breakpoint *bpt));
 828 extern void (*modify_breakpoint_hook) PARAMS ((struct breakpoint *bpt));
 829 extern void (*interactive_hook) PARAMS ((void));
 830 extern void (*registers_changed_hook) PARAMS ((void));
 831
 832 extern int (*target_wait_hook) PARAMS ((int pid,
 833                                         struct target_waitstatus *status));
 834
 835 extern void (*call_command_hook) PARAMS ((struct cmd_list_element *c,
 836                                           char *cmd, int from_tty));
 837
 838 /* Inhibit window interface if non-zero. */
 839
 840 extern int use_windows;
 841
 842 #endif /* #ifndef DEFS_H */