gdb/defs.h

   1 /* Basic, host-specific, and target-specific definitions for GDB.
   2    Copyright (C) 1986, 1989, 1991, 1992, 1993, 1994
   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 int print_insn PARAMS ((CORE_ADDR, GDB_FILE *));
 207
 208 extern void gdb_flush PARAMS ((GDB_FILE *));
 209
 210 extern GDB_FILE *gdb_fopen PARAMS ((char * name, char * mode));
 211
 212 extern void fputs_filtered PARAMS ((const char *, GDB_FILE *));
 213
 214 extern void fputs_unfiltered PARAMS ((const char *, GDB_FILE *));
 215
 216 extern void fputc_unfiltered PARAMS ((int, GDB_FILE *));
 217
 218 extern void putc_unfiltered PARAMS ((int));
 219
 220 #define putchar_unfiltered(C)  putc_unfiltered(C)
 221
 222 extern void puts_filtered PARAMS ((char *));
 223
 224 extern void puts_unfiltered PARAMS ((char *));
 225
 226 extern void vprintf_filtered ();
 227
 228 extern void vfprintf_filtered ();
 229
 230 extern void fprintf_filtered ();
 231
 232 extern void fprintfi_filtered ();
 233
 234 extern void printf_filtered ();
 235
 236 extern void printfi_filtered ();
 237
 238 extern void vprintf_unfiltered ();
 239
 240 extern void vfprintf_unfiltered ();
 241
 242 extern void fprintf_unfiltered ();
 243
 244 extern void printf_unfiltered ();
 245
 246 extern void print_spaces PARAMS ((int, GDB_FILE *));
 247
 248 extern void print_spaces_filtered PARAMS ((int, GDB_FILE *));
 249
 250 extern char *n_spaces PARAMS ((int));
 251
 252 extern void gdb_printchar PARAMS ((int, GDB_FILE *, int));
 253
 254 extern void gdb_print_address PARAMS ((void *, GDB_FILE *));
 255
 256 extern void fprintf_symbol_filtered PARAMS ((GDB_FILE *, char *,
 257                                              enum language, int));
 258
 259 extern void perror_with_name PARAMS ((char *));
 260
 261 extern void print_sys_errmsg PARAMS ((char *, int));
 262
 263 /* From regex.c or libc.  BSD 4.4 declares this with the argument type as
 264    "const char *" in unistd.h, so we can't declare the argument
 265    as "char *".  */
 266
 267 extern char *re_comp PARAMS ((const char *));
 268
 269 /* From symfile.c */
 270
 271 extern void symbol_file_command PARAMS ((char *, int));
 272
 273 /* From main.c */
 274
 275 extern char *skip_quoted PARAMS ((char *));
 276
 277 extern char *gdb_readline PARAMS ((char *));
 278
 279 extern char *command_line_input PARAMS ((char *, int, char *));
 280
 281 extern void print_prompt PARAMS ((void));
 282
 283 extern int input_from_terminal_p PARAMS ((void));
 284
 285 /* From printcmd.c */
 286
 287 extern void set_next_address PARAMS ((CORE_ADDR));
 288
 289 extern void print_address_symbolic PARAMS ((CORE_ADDR, GDB_FILE *, int,
 290                                             char *));
 291
 292 extern void print_address_numeric PARAMS ((CORE_ADDR, int, GDB_FILE *));
 293
 294 extern void print_address PARAMS ((CORE_ADDR, GDB_FILE *));
 295
 296 /* From source.c */
 297
 298 extern int openp PARAMS ((char *, int, char *, int, int, char **));
 299
 300 extern void mod_path PARAMS ((char *, char **));
 301
 302 extern void directory_command PARAMS ((char *, int));
 303
 304 extern void init_source_path PARAMS ((void));
 305
 306 extern char *symtab_to_filename PARAMS ((struct symtab *));
 307
 308 /* From findvar.c */
 309
 310 extern int read_relative_register_raw_bytes PARAMS ((int, char *));
 311
 312 /* From readline (but not in any readline .h files).  */
 313
 314 extern char *tilde_expand PARAMS ((char *));
 315
 316 /* Control types for commands */
 317
 318 enum misc_command_type
 319 {
 320   ok_command,
 321   end_command,
 322   else_command,
 323   nop_command
 324 };
 325
 326 enum command_control_type
 327 {
 328   simple_control,
 329   break_control,
 330   continue_control,
 331   while_control,
 332   if_control,
 333   invalid_control
 334 };
 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   enum command_control_type control_type;
 344   int body_count;
 345   struct command_line **body_list;
 346 };
 347
 348 extern struct command_line *read_command_lines PARAMS ((void));
 349
 350 extern void free_command_lines PARAMS ((struct command_line **));
 351
 352 /* String containing the current directory (what getwd would return).  */
 353
 354 extern char *current_directory;
 355
 356 /* Default radixes for input and output.  Only some values supported.  */
 357 extern unsigned input_radix;
 358 extern unsigned output_radix;
 359
 360 /* Possibilities for prettyprint parameters to routines which print
 361    things.  Like enum language, this should be in value.h, but needs
 362    to be here for the same reason.  FIXME:  If we can eliminate this
 363    as an arg to LA_VAL_PRINT, then we can probably move it back to
 364    value.h. */
 365
 366 enum val_prettyprint
 367 {
 368   Val_no_prettyprint = 0,
 369   Val_prettyprint,
 370   /* Use the default setting which the user has specified.  */
 371   Val_pretty_default
 372 };
 373
 374 \f
 375 /* Host machine definition.  This will be a symlink to one of the
 376    xm-*.h files, built by the `configure' script.  */
 377
 378 #include "xm.h"
 379
 380 /* Native machine support.  This will be a symlink to one of the
 381    nm-*.h files, built by the `configure' script.  */
 382
 383 #include "nm.h"
 384
 385 /* Target machine definition.  This will be a symlink to one of the
 386    tm-*.h files, built by the `configure' script.  */
 387
 388 #include "tm.h"
 389
 390 /* If the xm.h file did not define the mode string used to open the
 391    files, assume that binary files are opened the same way as text
 392    files */
 393 #ifndef FOPEN_RB
 394 #include "fopen-same.h"
 395 #endif
 396
 397 /*
 398  * Allow things in gdb to be declared "const".  If compiling ANSI, it
 399  * just works.  If compiling with gcc but non-ansi, redefine to __const__.
 400  * If non-ansi, non-gcc, then eliminate "const" entirely, making those
 401  * objects be read-write rather than read-only.
 402  */
 403
 404 #ifndef const
 405 #ifndef __STDC__
 406 # ifdef __GNUC__
 407 #  define const __const__
 408 # else
 409 #  define const /*nothing*/
 410 # endif /* GNUC */
 411 #endif /* STDC */
 412 #endif /* const */
 413
 414 #ifndef volatile
 415 #ifndef __STDC__
 416 # ifdef __GNUC__
 417 #  define volatile __volatile__
 418 # else
 419 #  define volatile /*nothing*/
 420 # endif /* GNUC */
 421 #endif /* STDC */
 422 #endif /* volatile */
 423
 424 /* The ability to declare that a function never returns is useful, but
 425    not really required to compile GDB successfully, so the NORETURN and
 426    ATTR_NORETURN macros normally expand into nothing.  */
 427
 428 /* If compiling with older versions of GCC, a function may be declared
 429    "volatile" to indicate that it does not return.  */
 430
 431 #ifndef NORETURN
 432 # if defined(__GNUC__) \
 433      && (__GNUC__ == 1 || (__GNUC__ == 2 && __GNUC_MINOR__ < 5))
 434 #  define NORETURN volatile
 435 # else
 436 #  define NORETURN /* nothing */
 437 # endif
 438 #endif
 439
 440 /* GCC 2.5 and later versions define a function attribute "noreturn",
 441    which is the preferred way to declare that a function never returns.  */
 442
 443 #ifndef ATTR_NORETURN
 444 # if defined(__GNUC__) && __GNUC__ >= 2 && __GNUC_MINOR__ >= 5
 445 #  define ATTR_NORETURN __attribute__ ((noreturn))
 446 # else
 447 #  define ATTR_NORETURN /* nothing */
 448 # endif
 449 #endif
 450
 451 /* Defaults for system-wide constants (if not defined by xm.h, we fake it).  */
 452
 453 #if !defined (UINT_MAX)
 454 #define UINT_MAX ((unsigned int)(~0))           /* 0xFFFFFFFF for 32-bits */
 455 #endif
 456
 457 #if !defined (INT_MAX)
 458 #define INT_MAX ((int)(UINT_MAX >> 1))          /* 0x7FFFFFFF for 32-bits */
 459 #endif
 460
 461 #if !defined (INT_MIN)
 462 #define INT_MIN (-INT_MAX - 1)                  /* 0x80000000 for 32-bits */
 463 #endif
 464
 465 #if !defined (ULONG_MAX)
 466 #define ULONG_MAX ((unsigned long)(~0L))        /* 0xFFFFFFFF for 32-bits */
 467 #endif
 468
 469 #if !defined (LONG_MAX)
 470 #define LONG_MAX ((long)(ULONG_MAX >> 1))       /* 0x7FFFFFFF for 32-bits */
 471 #endif
 472
 473 #ifdef BFD64
 474
 475 /* This is to make sure that LONGEST is at least as big as CORE_ADDR.  */
 476
 477 #define LONGEST BFD_HOST_64_BIT
 478
 479 #else /* No BFD64 */
 480
 481 /* If all compilers for this host support "long long" and we want to
 482    use it for LONGEST (the performance hit is about 10% on a testsuite
 483    run based on one DECstation test), then the xm.h file can define
 484    CC_HAS_LONG_LONG.
 485
 486    Using GCC 1.39 on BSDI with long long causes about 700 new
 487    testsuite failures.  Using long long for LONGEST on the DECstation
 488    causes 3 new FAILs in the testsuite and many heuristic fencepost
 489    warnings.  These are not investigated, but a first guess would be
 490    that the BSDI problems are GCC bugs in long long support and the
 491    latter are GDB bugs.  */
 492
 493 #ifndef CC_HAS_LONG_LONG
 494 #  if defined (__GNUC__) && defined (FORCE_LONG_LONG)
 495 #    define CC_HAS_LONG_LONG 1
 496 #  endif
 497 #endif
 498
 499 /* LONGEST should not be a typedef, because "unsigned LONGEST" needs to work.
 500    CC_HAS_LONG_LONG is defined if the host compiler supports "long long"
 501    variables and we wish to make use of that support.  */
 502
 503 #ifndef LONGEST
 504 #  ifdef CC_HAS_LONG_LONG
 505 #    define LONGEST long long
 506 #  else
 507 #    define LONGEST long
 508 #  endif
 509 #endif
 510
 511 #endif /* No BFD64 */
 512
 513 /* Convert a LONGEST to an int.  This is used in contexts (e.g. number of
 514    arguments to a function, number in a value history, register number, etc.)
 515    where the value must not be larger than can fit in an int.  */
 516
 517 extern int longest_to_int PARAMS ((LONGEST));
 518
 519 /* Assorted functions we can declare, now that const and volatile are
 520    defined.  */
 521
 522 extern char *savestring PARAMS ((const char *, int));
 523
 524 extern char *msavestring PARAMS ((void *, const char *, int));
 525
 526 extern char *strsave PARAMS ((const char *));
 527
 528 extern char *mstrsave PARAMS ((void *, const char *));
 529
 530 extern PTR xmalloc PARAMS ((long));
 531
 532 extern PTR xrealloc PARAMS ((PTR, long));
 533
 534 extern PTR xmmalloc PARAMS ((PTR, long));
 535
 536 extern PTR xmrealloc PARAMS ((PTR, PTR, long));
 537
 538 extern int parse_escape PARAMS ((char **));
 539
 540 extern char *reg_names[];
 541
 542 /* Message to be printed before the error message, when an error occurs.  */
 543
 544 extern char *error_pre_print;
 545
 546 /* Message to be printed before the warning message, when a warning occurs.  */
 547
 548 extern char *warning_pre_print;
 549
 550 extern NORETURN void error () ATTR_NORETURN;
 551
 552 extern void error_begin PARAMS ((void));
 553
 554 extern NORETURN void fatal () ATTR_NORETURN;
 555
 556 extern NORETURN void exit PARAMS ((int)) ATTR_NORETURN; /* 4.10.4.3 */
 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_setup 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 #ifndef PSIGNAL_IN_SIGNAL_H
 593 extern void psignal PARAMS ((unsigned, const char *));
 594 #endif
 595
 596 /* For now, we can't include <stdlib.h> because it conflicts with
 597    "../include/getopt.h".  (FIXME)
 598
 599    However, if a function is defined in the ANSI C standard and a prototype
 600    for that function is defined and visible in any header file in an ANSI
 601    conforming environment, then that prototype must match the definition in
 602    the ANSI standard.  So we can just duplicate them here without conflict,
 603    since they must be the same in all conforming ANSI environments.  If
 604    these cause problems, then the environment is not ANSI conformant. */
 605
 606 #ifdef __STDC__
 607 #include <stddef.h>
 608 #endif
 609
 610 extern int fclose PARAMS ((GDB_FILE *stream));          /* 4.9.5.1 */
 611
 612 extern void perror PARAMS ((const char *));             /* 4.9.10.4 */
 613
 614 extern double atof PARAMS ((const char *nptr));         /* 4.10.1.1 */
 615
 616 extern int atoi PARAMS ((const char *));                /* 4.10.1.2 */
 617
 618 #ifndef MALLOC_INCOMPATIBLE
 619
 620 extern PTR malloc PARAMS ((size_t size));               /* 4.10.3.3 */
 621
 622 extern PTR realloc PARAMS ((void *ptr, size_t size));   /* 4.10.3.4 */
 623
 624 extern void free PARAMS ((void *));                     /* 4.10.3.2 */
 625
 626 #endif  /* MALLOC_INCOMPATIBLE */
 627
 628 extern void
 629 qsort PARAMS ((void *base, size_t nmemb,                /* 4.10.5.2 */
 630                size_t size,
 631                int (*compar)(const void *, const void *)));
 632
 633 #ifndef MEM_FNS_DECLARED        /* Some non-ANSI use void *, not char *.  */
 634 extern PTR memcpy PARAMS ((void *, const void *, size_t));  /* 4.11.2.1 */
 635
 636 extern int memcmp PARAMS ((const void *, const void *, size_t)); /* 4.11.4.1 */
 637 #endif
 638
 639 extern char *strchr PARAMS ((const char *, int));       /* 4.11.5.2 */
 640
 641 extern char *strrchr PARAMS ((const char *, int));      /* 4.11.5.5 */
 642
 643 extern char *strstr PARAMS ((const char *, const char *)); /* 4.11.5.7 */
 644
 645 extern char *strtok PARAMS ((char *, const char *));    /* 4.11.5.8 */
 646
 647 #ifndef MEM_FNS_DECLARED        /* Some non-ANSI use void *, not char *.  */
 648 extern PTR memset PARAMS ((void *, int, size_t));       /* 4.11.6.1 */
 649 #endif
 650
 651 extern char *strerror PARAMS ((int));                   /* 4.11.6.2 */
 652
 653 /* Various possibilities for alloca.  */
 654 #ifndef alloca
 655 # ifdef __GNUC__
 656 #  define alloca __builtin_alloca
 657 # else /* Not GNU C */
 658 #  ifdef sparc
 659 #   include <alloca.h>          /* NOTE:  Doesn't declare alloca() */
 660 #  endif
 661
 662 /* We need to be careful not to declare this in a way which conflicts with
 663    bison.  Bison never declares it as char *, but under various circumstances
 664    (like __hpux) we need to use void *.  */
 665 #  if defined (__STDC__) || defined (__hpux)
 666    extern void *alloca ();
 667 #  else /* Don't use void *.  */
 668    extern char *alloca ();
 669 #  endif /* Don't use void *.  */
 670 # endif /* Not GNU C */
 671 #endif /* alloca not defined */
 672
 673 /* HOST_BYTE_ORDER must be defined to one of these.  */
 674
 675 #if !defined (BIG_ENDIAN)
 676 #define BIG_ENDIAN 4321
 677 #endif
 678
 679 #if !defined (LITTLE_ENDIAN)
 680 #define LITTLE_ENDIAN 1234
 681 #endif
 682
 683 /* Target-system-dependent parameters for GDB. */
 684
 685 #ifdef TARGET_BYTE_ORDER_SELECTABLE
 686 /* The target endianness is selectable at runtime.  Define
 687    TARGET_BYTE_ORDER to be a variable.  The user can use the `set
 688    endian' command to change it.  */
 689 #undef TARGET_BYTE_ORDER
 690 #define TARGET_BYTE_ORDER target_byte_order
 691 extern int target_byte_order;
 692 #endif
 693
 694 extern void set_endian_from_file PARAMS ((bfd *));
 695
 696 /* Number of bits in a char or unsigned char for the target machine.
 697    Just like CHAR_BIT in <limits.h> but describes the target machine.  */
 698 #if !defined (TARGET_CHAR_BIT)
 699 #define TARGET_CHAR_BIT 8
 700 #endif
 701
 702 /* Number of bits in a short or unsigned short for the target machine. */
 703 #if !defined (TARGET_SHORT_BIT)
 704 #define TARGET_SHORT_BIT (2 * TARGET_CHAR_BIT)
 705 #endif
 706
 707 /* Number of bits in an int or unsigned int for the target machine. */
 708 #if !defined (TARGET_INT_BIT)
 709 #define TARGET_INT_BIT (4 * TARGET_CHAR_BIT)
 710 #endif
 711
 712 /* Number of bits in a long or unsigned long for the target machine. */
 713 #if !defined (TARGET_LONG_BIT)
 714 #define TARGET_LONG_BIT (4 * TARGET_CHAR_BIT)
 715 #endif
 716
 717 /* Number of bits in a long long or unsigned long long for the target machine. */
 718 #if !defined (TARGET_LONG_LONG_BIT)
 719 #define TARGET_LONG_LONG_BIT (2 * TARGET_LONG_BIT)
 720 #endif
 721
 722 /* Number of bits in a float for the target machine. */
 723 #if !defined (TARGET_FLOAT_BIT)
 724 #define TARGET_FLOAT_BIT (4 * TARGET_CHAR_BIT)
 725 #endif
 726
 727 /* Number of bits in a double for the target machine. */
 728 #if !defined (TARGET_DOUBLE_BIT)
 729 #define TARGET_DOUBLE_BIT (8 * TARGET_CHAR_BIT)
 730 #endif
 731
 732 /* Number of bits in a long double for the target machine.  */
 733 #if !defined (TARGET_LONG_DOUBLE_BIT)
 734 #define TARGET_LONG_DOUBLE_BIT (2 * TARGET_DOUBLE_BIT)
 735 #endif
 736
 737 /* Number of bits in a "complex" for the target machine. */
 738 #if !defined (TARGET_COMPLEX_BIT)
 739 #define TARGET_COMPLEX_BIT (2 * TARGET_FLOAT_BIT)
 740 #endif
 741
 742 /* Number of bits in a "double complex" for the target machine. */
 743 #if !defined (TARGET_DOUBLE_COMPLEX_BIT)
 744 #define TARGET_DOUBLE_COMPLEX_BIT (2 * TARGET_DOUBLE_BIT)
 745 #endif
 746
 747 /* Number of bits in a pointer for the target machine */
 748 #if !defined (TARGET_PTR_BIT)
 749 #define TARGET_PTR_BIT TARGET_INT_BIT
 750 #endif
 751
 752 /* If we picked up a copy of CHAR_BIT from a configuration file
 753    (which may get it by including <limits.h>) then use it to set
 754    the number of bits in a host char.  If not, use the same size
 755    as the target. */
 756
 757 #if defined (CHAR_BIT)
 758 #define HOST_CHAR_BIT CHAR_BIT
 759 #else
 760 #define HOST_CHAR_BIT TARGET_CHAR_BIT
 761 #endif
 762
 763 /* The bit byte-order has to do just with numbering of bits in
 764    debugging symbols and such.  Conceptually, it's quite separate
 765    from byte/word byte order.  */
 766
 767 #if !defined (BITS_BIG_ENDIAN)
 768 #ifndef TARGET_BYTE_ORDER_SELECTABLE
 769
 770 #if TARGET_BYTE_ORDER == BIG_ENDIAN
 771 #define BITS_BIG_ENDIAN 1
 772 #endif /* Big endian.  */
 773
 774 #if TARGET_BYTE_ORDER == LITTLE_ENDIAN
 775 #define BITS_BIG_ENDIAN 0
 776 #endif /* Little endian.  */
 777
 778 #else /* defined (TARGET_BYTE_ORDER_SELECTABLE) */
 779
 780 #define BITS_BIG_ENDIAN (TARGET_BYTE_ORDER == BIG_ENDIAN)
 781
 782 #endif /* defined (TARGET_BYTE_ORDER_SELECTABLE) */
 783 #endif /* BITS_BIG_ENDIAN not defined.  */
 784
 785 /* In findvar.c.  */
 786
 787 extern LONGEST extract_signed_integer PARAMS ((void *, int));
 788
 789 extern unsigned LONGEST extract_unsigned_integer PARAMS ((void *, int));
 790
 791 extern CORE_ADDR extract_address PARAMS ((void *, int));
 792
 793 extern void store_signed_integer PARAMS ((void *, int, LONGEST));
 794
 795 extern void store_unsigned_integer PARAMS ((void *, int, unsigned LONGEST));
 796
 797 extern void store_address PARAMS ((void *, int, CORE_ADDR));
 798
 799 extern double extract_floating PARAMS ((void *, int));
 800
 801 extern void store_floating PARAMS ((void *, int, double));
 802 \f
 803 /* On some machines there are bits in addresses which are not really
 804    part of the address, but are used by the kernel, the hardware, etc.
 805    for special purposes.  ADDR_BITS_REMOVE takes out any such bits
 806    so we get a "real" address such as one would find in a symbol
 807    table.  This is used only for addresses of instructions, and even then
 808    I'm not sure it's used in all contexts.  It exists to deal with there
 809    being a few stray bits in the PC which would mislead us, not as some sort
 810    of generic thing to handle alignment or segmentation (it's possible it
 811    should be in TARGET_READ_PC instead).  */
 812 #if !defined (ADDR_BITS_REMOVE)
 813 #define ADDR_BITS_REMOVE(addr) (addr)
 814 #endif /* No ADDR_BITS_REMOVE.  */
 815
 816 /* From valops.c */
 817
 818 extern CORE_ADDR push_bytes PARAMS ((CORE_ADDR, char *, int));
 819
 820 extern CORE_ADDR push_word PARAMS ((CORE_ADDR, unsigned LONGEST));
 821
 822 /* Some parts of gdb might be considered optional, in the sense that they
 823    are not essential for being able to build a working, usable debugger
 824    for a specific environment.  For example, the maintenance commands
 825    are there for the benefit of gdb maintainers.  As another example,
 826    some environments really don't need gdb's that are able to read N
 827    different object file formats.  In order to make it possible (but
 828    not necessarily recommended) to build "stripped down" versions of
 829    gdb, the following defines control selective compilation of those
 830    parts of gdb which can be safely left out when necessary.  Note that
 831    the default is to include everything. */
 832
 833 #ifndef MAINTENANCE_CMDS
 834 #define MAINTENANCE_CMDS 1
 835 #endif
 836
 837 /* Hooks for alternate command interfaces.  */
 838
 839 #include "dis-asm.h"            /* Get defs for disassemble_info */
 840
 841 #ifdef __STDC__
 842 struct target_waitstatus;
 843 struct cmd_list_element;
 844 #endif
 845
 846 extern void (*init_ui_hook) PARAMS ((void));
 847 extern void (*command_loop_hook) PARAMS ((void));
 848 extern void (*fputs_unfiltered_hook) PARAMS ((const char *linebuffer, FILE *stream));
 849 extern void (*print_frame_info_listing_hook) PARAMS ((struct symtab *s, int line,
 850                                                int stopline, int noerror));
 851 extern int (*query_hook) PARAMS (());
 852 extern void (*flush_hook) PARAMS ((FILE *stream));
 853 extern void (*create_breakpoint_hook) PARAMS ((struct breakpoint *b));
 854 extern void (*delete_breakpoint_hook) PARAMS ((struct breakpoint *bpt));
 855 extern void (*enable_breakpoint_hook) PARAMS ((struct breakpoint *bpt));
 856 extern void (*disable_breakpoint_hook) PARAMS ((struct breakpoint *bpt));
 857 extern void (*interactive_hook) PARAMS ((void));
 858 extern int (*dis_asm_read_memory_hook) PARAMS ((bfd_vma memaddr,
 859                                                 bfd_byte *myaddr, int len,
 860                                                 disassemble_info *info));
 861
 862 extern int (*target_wait_hook) PARAMS ((int pid,
 863                                         struct target_waitstatus *status));
 864
 865 extern void (*call_command_hook) PARAMS ((struct cmd_list_element *c,
 866                                           char *cmd, int from_tty));
 867
 868 extern NORETURN void (*error_hook) PARAMS (());
 869
 870 /* Inhibit window interface if non-zero. */
 871
 872 extern int use_windows;
 873
 874 #endif /* #ifndef DEFS_H */