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 void fputc_unfiltered PARAMS ((int, GDB_FILE *));
 215
 216 extern void putc_unfiltered PARAMS ((int));
 217
 218 #define putchar_unfiltered(C)  putc_unfiltered(C)
 219
 220 extern void puts_filtered PARAMS ((char *));
 221
 222 extern void puts_unfiltered PARAMS ((char *));
 223
 224 extern void vprintf_filtered ();
 225
 226 extern void vfprintf_filtered ();
 227
 228 extern void fprintf_filtered ();
 229
 230 extern void fprintfi_filtered ();
 231
 232 extern void printf_filtered ();
 233
 234 extern void printfi_filtered ();
 235
 236 extern void vprintf_unfiltered ();
 237
 238 extern void vfprintf_unfiltered ();
 239
 240 extern void fprintf_unfiltered ();
 241
 242 extern void printf_unfiltered ();
 243
 244 extern void print_spaces PARAMS ((int, GDB_FILE *));
 245
 246 extern void print_spaces_filtered PARAMS ((int, GDB_FILE *));
 247
 248 extern char *n_spaces PARAMS ((int));
 249
 250 extern void gdb_printchar PARAMS ((int, GDB_FILE *, int));
 251
 252 extern void gdb_print_address PARAMS ((void *, GDB_FILE *));
 253
 254 extern void fprintf_symbol_filtered PARAMS ((GDB_FILE *, char *,
 255                                              enum language, int));
 256
 257 extern void perror_with_name PARAMS ((char *));
 258
 259 extern void print_sys_errmsg PARAMS ((char *, int));
 260
 261 /* From regex.c or libc.  BSD 4.4 declares this with the argument type as
 262    "const char *" in unistd.h, so we can't declare the argument
 263    as "char *".  */
 264
 265 extern char *re_comp PARAMS ((const char *));
 266
 267 /* From symfile.c */
 268
 269 extern void symbol_file_command PARAMS ((char *, int));
 270
 271 /* From main.c */
 272
 273 extern char *skip_quoted PARAMS ((char *));
 274
 275 extern char *gdb_readline PARAMS ((char *));
 276
 277 extern char *command_line_input PARAMS ((char *, int, char *));
 278
 279 extern void print_prompt PARAMS ((void));
 280
 281 extern int input_from_terminal_p PARAMS ((void));
 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 warning message, when a warning occurs.  */
 545
 546 extern char *warning_pre_print;
 547
 548 extern NORETURN void error () ATTR_NORETURN;
 549
 550 extern void error_begin PARAMS ((void));
 551
 552 extern NORETURN void fatal () ATTR_NORETURN;
 553
 554 extern NORETURN void nomem PARAMS ((long)) ATTR_NORETURN;
 555
 556 /* Reasons for calling return_to_top_level.  */
 557 enum return_reason {
 558   /* User interrupt.  */
 559   RETURN_QUIT,
 560
 561   /* Any other error.  */
 562   RETURN_ERROR
 563 };
 564
 565 #define RETURN_MASK_QUIT (1 << (int)RETURN_QUIT)
 566 #define RETURN_MASK_ERROR (1 << (int)RETURN_ERROR)
 567 #define RETURN_MASK_ALL (RETURN_MASK_QUIT | RETURN_MASK_ERROR)
 568 typedef int return_mask;
 569
 570 extern NORETURN void
 571 return_to_top_level PARAMS ((enum return_reason)) ATTR_NORETURN;
 572
 573 extern int
 574 catch_errors PARAMS ((int (*) (char *), void *, char *, return_mask));
 575
 576 extern void warning_setup PARAMS ((void));
 577
 578 extern void warning ();
 579
 580 /* Global functions from other, non-gdb GNU thingies.
 581    Libiberty thingies are no longer declared here.  We include libiberty.h
 582    above, instead.  */
 583
 584 extern char *getenv PARAMS ((const char *));
 585
 586 /* From other system libraries */
 587
 588 #ifndef PSIGNAL_IN_SIGNAL_H
 589 extern void psignal PARAMS ((unsigned, const char *));
 590 #endif
 591
 592 #ifdef __STDC__
 593 #include <stddef.h>
 594 #include <stdlib.h>
 595 #endif
 596
 597 extern int fclose ();
 598
 599 extern double atof ();
 600
 601 #ifndef MALLOC_INCOMPATIBLE
 602
 603 extern PTR malloc ();
 604
 605 extern PTR realloc ();
 606
 607 extern void free ();
 608
 609 #endif /* MALLOC_INCOMPATIBLE */
 610
 611 extern char *strchr ();
 612
 613 extern char *strrchr ();
 614
 615 extern char *strstr ();
 616
 617 extern char *strtok ();
 618
 619 extern char *strerror ();
 620
 621 /* Various possibilities for alloca.  */
 622 #ifndef alloca
 623 # ifdef __GNUC__
 624 #  define alloca __builtin_alloca
 625 # else /* Not GNU C */
 626 #  ifdef sparc
 627 #   include <alloca.h>          /* NOTE:  Doesn't declare alloca() */
 628 #  endif
 629
 630 /* We need to be careful not to declare this in a way which conflicts with
 631    bison.  Bison never declares it as char *, but under various circumstances
 632    (like __hpux) we need to use void *.  */
 633 #  if defined (__STDC__) || defined (__hpux)
 634    extern void *alloca ();
 635 #  else /* Don't use void *.  */
 636    extern char *alloca ();
 637 #  endif /* Don't use void *.  */
 638 # endif /* Not GNU C */
 639 #endif /* alloca not defined */
 640
 641 /* HOST_BYTE_ORDER must be defined to one of these.  */
 642
 643 #if !defined (BIG_ENDIAN)
 644 #define BIG_ENDIAN 4321
 645 #endif
 646
 647 #if !defined (LITTLE_ENDIAN)
 648 #define LITTLE_ENDIAN 1234
 649 #endif
 650
 651 /* Target-system-dependent parameters for GDB. */
 652
 653 #ifdef TARGET_BYTE_ORDER_SELECTABLE
 654 /* The target endianness is selectable at runtime.  Define
 655    TARGET_BYTE_ORDER to be a variable.  The user can use the `set
 656    endian' command to change it.  */
 657 #undef TARGET_BYTE_ORDER
 658 #define TARGET_BYTE_ORDER target_byte_order
 659 extern int target_byte_order;
 660 #endif
 661
 662 extern void set_endian_from_file PARAMS ((bfd *));
 663
 664 /* Number of bits in a char or unsigned char for the target machine.
 665    Just like CHAR_BIT in <limits.h> but describes the target machine.  */
 666 #if !defined (TARGET_CHAR_BIT)
 667 #define TARGET_CHAR_BIT 8
 668 #endif
 669
 670 /* Number of bits in a short or unsigned short for the target machine. */
 671 #if !defined (TARGET_SHORT_BIT)
 672 #define TARGET_SHORT_BIT (2 * TARGET_CHAR_BIT)
 673 #endif
 674
 675 /* Number of bits in an int or unsigned int for the target machine. */
 676 #if !defined (TARGET_INT_BIT)
 677 #define TARGET_INT_BIT (4 * TARGET_CHAR_BIT)
 678 #endif
 679
 680 /* Number of bits in a long or unsigned long for the target machine. */
 681 #if !defined (TARGET_LONG_BIT)
 682 #define TARGET_LONG_BIT (4 * TARGET_CHAR_BIT)
 683 #endif
 684
 685 /* Number of bits in a long long or unsigned long long for the target machine. */
 686 #if !defined (TARGET_LONG_LONG_BIT)
 687 #define TARGET_LONG_LONG_BIT (2 * TARGET_LONG_BIT)
 688 #endif
 689
 690 /* Number of bits in a float for the target machine. */
 691 #if !defined (TARGET_FLOAT_BIT)
 692 #define TARGET_FLOAT_BIT (4 * TARGET_CHAR_BIT)
 693 #endif
 694
 695 /* Number of bits in a double for the target machine. */
 696 #if !defined (TARGET_DOUBLE_BIT)
 697 #define TARGET_DOUBLE_BIT (8 * TARGET_CHAR_BIT)
 698 #endif
 699
 700 /* Number of bits in a long double for the target machine.  */
 701 #if !defined (TARGET_LONG_DOUBLE_BIT)
 702 #define TARGET_LONG_DOUBLE_BIT (2 * TARGET_DOUBLE_BIT)
 703 #endif
 704
 705 /* Number of bits in a pointer for the target machine */
 706 #if !defined (TARGET_PTR_BIT)
 707 #define TARGET_PTR_BIT TARGET_INT_BIT
 708 #endif
 709
 710 /* If we picked up a copy of CHAR_BIT from a configuration file
 711    (which may get it by including <limits.h>) then use it to set
 712    the number of bits in a host char.  If not, use the same size
 713    as the target. */
 714
 715 #if defined (CHAR_BIT)
 716 #define HOST_CHAR_BIT CHAR_BIT
 717 #else
 718 #define HOST_CHAR_BIT TARGET_CHAR_BIT
 719 #endif
 720
 721 /* The bit byte-order has to do just with numbering of bits in
 722    debugging symbols and such.  Conceptually, it's quite separate
 723    from byte/word byte order.  */
 724
 725 #if !defined (BITS_BIG_ENDIAN)
 726 #ifndef TARGET_BYTE_ORDER_SELECTABLE
 727
 728 #if TARGET_BYTE_ORDER == BIG_ENDIAN
 729 #define BITS_BIG_ENDIAN 1
 730 #endif /* Big endian.  */
 731
 732 #if TARGET_BYTE_ORDER == LITTLE_ENDIAN
 733 #define BITS_BIG_ENDIAN 0
 734 #endif /* Little endian.  */
 735
 736 #else /* defined (TARGET_BYTE_ORDER_SELECTABLE) */
 737
 738 #define BITS_BIG_ENDIAN (TARGET_BYTE_ORDER == BIG_ENDIAN)
 739
 740 #endif /* defined (TARGET_BYTE_ORDER_SELECTABLE) */
 741 #endif /* BITS_BIG_ENDIAN not defined.  */
 742
 743 /* Swap LEN bytes at BUFFER between target and host byte-order.  */
 744 #if TARGET_BYTE_ORDER == HOST_BYTE_ORDER
 745 #define SWAP_TARGET_AND_HOST(buffer,len)
 746 #else /* Target and host byte order differ.  */
 747 #define SWAP_TARGET_AND_HOST(buffer,len) \
 748   {                                                                      \
 749     char __tmp_;
 750  \
 751     char *p = (char *)(buffer);                                          \
 752     char *q = ((char *)(buffer)) + len - 1;                              \
 753     for (; p < q; p++, q--)                                              \
 754       {                                                                  \
 755         __tmp_ = *q;                                                     \
 756         *q = *p;                                                         \
 757         *p = __tmp_;                                                     \
 758       }                                                                  \
 759   }
 760 #endif /* Target and host byte order differ.  */
 761
 762 /* In findvar.c.  */
 763
 764 extern LONGEST extract_signed_integer PARAMS ((void *, int));
 765
 766 extern unsigned LONGEST extract_unsigned_integer PARAMS ((void *, int));
 767
 768 extern CORE_ADDR extract_address PARAMS ((void *, int));
 769
 770 extern void store_signed_integer PARAMS ((void *, int, LONGEST));
 771
 772 extern void store_unsigned_integer PARAMS ((void *, int, unsigned LONGEST));
 773
 774 extern void store_address PARAMS ((void *, int, CORE_ADDR));
 775
 776 extern double extract_floating PARAMS ((void *, int));
 777
 778 extern void store_floating PARAMS ((void *, int, double));
 779 \f
 780 /* On some machines there are bits in addresses which are not really
 781    part of the address, but are used by the kernel, the hardware, etc.
 782    for special purposes.  ADDR_BITS_REMOVE takes out any such bits
 783    so we get a "real" address such as one would find in a symbol
 784    table.  This is used only for addresses of instructions, and even then
 785    I'm not sure it's used in all contexts.  It exists to deal with there
 786    being a few stray bits in the PC which would mislead us, not as some sort
 787    of generic thing to handle alignment or segmentation (it's possible it
 788    should be in TARGET_READ_PC instead).  */
 789 #if !defined (ADDR_BITS_REMOVE)
 790 #define ADDR_BITS_REMOVE(addr) (addr)
 791 #endif /* No ADDR_BITS_REMOVE.  */
 792
 793 /* From valops.c */
 794
 795 extern CORE_ADDR push_bytes PARAMS ((CORE_ADDR, char *, int));
 796
 797 extern CORE_ADDR push_word PARAMS ((CORE_ADDR, unsigned LONGEST));
 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 "dis-asm.h"            /* Get defs for disassemble_info */
 815
 816 extern int dis_asm_read_memory PARAMS ((bfd_vma memaddr, bfd_byte *myaddr,
 817                                         int len, disassemble_info *info));
 818
 819 extern void dis_asm_memory_error PARAMS ((int status, bfd_vma memaddr,
 820                                           disassemble_info *info));
 821
 822 extern void dis_asm_print_address PARAMS ((bfd_vma addr,
 823                                            disassemble_info *info));
 824
 825 extern int (*tm_print_insn) PARAMS ((bfd_vma, disassemble_info*));
 826
 827 /* Hooks for alternate command interfaces.  */
 828
 829 #ifdef __STDC__
 830 struct target_waitstatus;
 831 struct cmd_list_element;
 832 #endif
 833
 834 extern void (*init_ui_hook) PARAMS ((void));
 835 extern void (*command_loop_hook) PARAMS ((void));
 836 extern void (*fputs_unfiltered_hook) PARAMS ((const char *linebuffer,
 837                                               FILE *stream));
 838 extern void (*print_frame_info_listing_hook) PARAMS ((struct symtab *s,
 839                                                       int line, int stopline,
 840                                                       int noerror));
 841 extern int (*query_hook) PARAMS (());
 842 extern void (*flush_hook) PARAMS ((FILE *stream));
 843 extern void (*create_breakpoint_hook) PARAMS ((struct breakpoint *b));
 844 extern void (*delete_breakpoint_hook) PARAMS ((struct breakpoint *bpt));
 845 extern void (*modify_breakpoint_hook) PARAMS ((struct breakpoint *bpt));
 846 extern void (*interactive_hook) PARAMS ((void));
 847 extern void (*registers_changed_hook) PARAMS ((void));
 848
 849 extern int (*target_wait_hook) PARAMS ((int pid,
 850                                         struct target_waitstatus *status));
 851
 852 extern void (*call_command_hook) PARAMS ((struct cmd_list_element *c,
 853                                           char *cmd, int from_tty));
 854
 855 extern NORETURN void (*error_hook) PARAMS (());
 856
 857 /* Inhibit window interface if non-zero. */
 858
 859 extern int use_windows;
 860
 861 #endif /* #ifndef DEFS_H */