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 #if !defined (DEFS_H)
  22 #define DEFS_H 1
  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 /* For BFD64 and bfd_vma.  */
  37 #include "bfd.h"
  38
  39 /* An address in the program being debugged.  Host byte order.  Rather
  40    than duplicate all the logic in BFD which figures out what type
  41    this is (long, long long, etc.) and whether it needs to be 64
  42    bits (the host/target interactions are subtle), we just use
  43    bfd_vma.  */
  44
  45 typedef bfd_vma CORE_ADDR;
  46
  47 #define min(a, b) ((a) < (b) ? (a) : (b))
  48 #define max(a, b) ((a) > (b) ? (a) : (b))
  49
  50 /* Gdb does *lots* of string compares.  Use macros to speed them up by
  51    avoiding function calls if the first characters are not the same. */
  52
  53 #define STRCMP(a,b) (*(a) == *(b) ? strcmp ((a), (b)) : (int)*(a) - (int)*(b))
  54 #define STREQ(a,b) (*(a) == *(b) ? !strcmp ((a), (b)) : 0)
  55 #define STREQN(a,b,c) (*(a) == *(b) ? !strncmp ((a), (b), (c)) : 0)
  56
  57 /* The character GNU C++ uses to build identifiers that must be unique from
  58    the program's identifiers (such as $this and $$vptr).  */
  59 #define CPLUS_MARKER '$'        /* May be overridden to '.' for SysV */
  60
  61 #include <errno.h>              /* System call error return status */
  62
  63 extern int quit_flag;
  64 extern int immediate_quit;
  65 extern int sevenbit_strings;
  66
  67 extern void quit PARAMS ((void));
  68
  69 #define QUIT { if (quit_flag) quit (); }
  70
  71 /* Command classes are top-level categories into which commands are broken
  72    down for "help" purposes.
  73    Notes on classes: class_alias is for alias commands which are not
  74    abbreviations of the original command.  class-pseudo is for commands
  75    which are not really commands nor help topics ("stop").  */
  76
  77 enum command_class
  78 {
  79   /* Special args to help_list */
  80   all_classes = -2, all_commands = -1,
  81   /* Classes of commands */
  82   no_class = -1, class_run = 0, class_vars, class_stack,
  83   class_files, class_support, class_info, class_breakpoint,
  84   class_alias, class_obscure, class_user, class_maintenance,
  85   class_pseudo
  86 };
  87
  88 /* Languages represented in the symbol table and elsewhere.
  89    This should probably be in language.h, but since enum's can't
  90    be forward declared to satisfy opaque references before their
  91    actual definition, needs to be here. */
  92
  93 enum language
  94 {
  95    language_unknown,            /* Language not known */
  96    language_auto,               /* Placeholder for automatic setting */
  97    language_c,                  /* C */
  98    language_cplus,              /* C++ */
  99    language_chill,              /* Chill */
 100    language_fortran,            /* Fortran */
 101    language_m2,                 /* Modula-2 */
 102    language_asm                 /* Assembly language */
 103 };
 104
 105 /* the cleanup list records things that have to be undone
 106    if an error happens (descriptors to be closed, memory to be freed, etc.)
 107    Each link in the chain records a function to call and an
 108    argument to give it.
 109
 110    Use make_cleanup to add an element to the cleanup chain.
 111    Use do_cleanups to do all cleanup actions back to a given
 112    point in the chain.  Use discard_cleanups to remove cleanups
 113    from the chain back to a given point, not doing them.  */
 114
 115 struct cleanup
 116 {
 117   struct cleanup *next;
 118   void (*function) PARAMS ((PTR));
 119   PTR arg;
 120 };
 121
 122 /* From blockframe.c */
 123
 124 extern int inside_entry_func PARAMS ((CORE_ADDR));
 125
 126 extern int inside_entry_file PARAMS ((CORE_ADDR addr));
 127
 128 extern int inside_main_func PARAMS ((CORE_ADDR pc));
 129
 130 /* From ch-lang.c, for the moment. (FIXME) */
 131
 132 extern char *chill_demangle PARAMS ((const char *));
 133
 134 /* From libiberty.a */
 135
 136 extern char *cplus_demangle PARAMS ((const char *, int));
 137
 138 extern char *cplus_mangle_opname PARAMS ((char *, int));
 139
 140 /* From libmmalloc.a (memory mapped malloc library) */
 141
 142 extern PTR mmalloc_attach PARAMS ((int, PTR));
 143
 144 extern PTR mmalloc_detach PARAMS ((PTR));
 145
 146 extern PTR mmalloc PARAMS ((PTR, long));
 147
 148 extern PTR mrealloc PARAMS ((PTR, PTR, long));
 149
 150 extern void mfree PARAMS ((PTR, PTR));
 151
 152 extern int mmalloc_setkey PARAMS ((PTR, int, PTR));
 153
 154 extern PTR mmalloc_getkey PARAMS ((PTR, int));
 155
 156 /* From utils.c */
 157
 158 extern int strcmp_iw PARAMS ((const char *, const char *));
 159
 160 extern char *safe_strerror PARAMS ((int));
 161
 162 extern char *safe_strsignal PARAMS ((int));
 163
 164 extern void init_malloc PARAMS ((void *));
 165
 166 extern void request_quit PARAMS ((int));
 167
 168 extern void do_cleanups PARAMS ((struct cleanup *));
 169
 170 extern void discard_cleanups PARAMS ((struct cleanup *));
 171
 172 /* The bare make_cleanup function is one of those rare beasts that
 173    takes almost any type of function as the first arg and anything that
 174    will fit in a "void *" as the second arg.
 175
 176    Should be, once all calls and called-functions are cleaned up:
 177 extern struct cleanup *
 178 make_cleanup PARAMS ((void (*function) (void *), void *));
 179
 180    Until then, lint and/or various type-checking compiler options will
 181    complain about make_cleanup calls.  It'd be wrong to just cast things,
 182    since the type actually passed when the function is called would be
 183    wrong.  */
 184
 185 extern struct cleanup *make_cleanup ();
 186
 187 extern struct cleanup *save_cleanups PARAMS ((void));
 188
 189 extern void restore_cleanups PARAMS ((struct cleanup *));
 190
 191 extern void free_current_contents PARAMS ((char **));
 192
 193 extern void null_cleanup PARAMS ((char **));
 194
 195 extern int myread PARAMS ((int, char *, int));
 196
 197 extern int query ();
 198 \f
 199 /* Annotation stuff.  */
 200
 201 extern int annotation_level; /* in stack.c */
 202 \f
 203 extern void begin_line PARAMS ((void));
 204
 205 extern void wrap_here PARAMS ((char *));
 206
 207 extern void reinitialize_more_filter PARAMS ((void));
 208
 209 typedef FILE GDB_FILE;
 210 #define gdb_stdout stdout
 211 #define gdb_stderr stderr
 212
 213 extern int print_insn PARAMS ((CORE_ADDR, GDB_FILE *));
 214
 215 extern void gdb_flush PARAMS ((GDB_FILE *));
 216
 217 extern GDB_FILE *gdb_fopen PARAMS ((char * name, char * mode));
 218
 219 extern void fputs_filtered PARAMS ((const char *, GDB_FILE *));
 220
 221 extern void fputs_unfiltered PARAMS ((const char *, GDB_FILE *));
 222
 223 extern void fputc_unfiltered PARAMS ((int, GDB_FILE *));
 224
 225 extern void putc_unfiltered PARAMS ((int));
 226
 227 #define putchar_unfiltered(C)  putc_unfiltered(C)
 228
 229 extern void puts_filtered PARAMS ((char *));
 230
 231 extern void puts_unfiltered PARAMS ((char *));
 232
 233 extern void vprintf_filtered ();
 234
 235 extern void vfprintf_filtered ();
 236
 237 extern void fprintf_filtered ();
 238
 239 extern void fprintfi_filtered ();
 240
 241 extern void printf_filtered ();
 242
 243 extern void printfi_filtered ();
 244
 245 extern void vprintf_unfiltered ();
 246
 247 extern void vfprintf_unfiltered ();
 248
 249 extern void fprintf_unfiltered ();
 250
 251 extern void printf_unfiltered ();
 252
 253 extern void print_spaces PARAMS ((int, GDB_FILE *));
 254
 255 extern void print_spaces_filtered PARAMS ((int, GDB_FILE *));
 256
 257 extern char *n_spaces PARAMS ((int));
 258
 259 extern void gdb_printchar PARAMS ((int, GDB_FILE *, int));
 260
 261 extern void gdb_print_address PARAMS ((void *, GDB_FILE *));
 262
 263 extern void fprintf_symbol_filtered PARAMS ((GDB_FILE *, char *,
 264                                              enum language, int));
 265
 266 extern void perror_with_name PARAMS ((char *));
 267
 268 extern void print_sys_errmsg PARAMS ((char *, int));
 269
 270 /* From regex.c or libc.  BSD 4.4 declares this with the argument type as
 271    "const char *" in unistd.h, so we can't declare the argument
 272    as "char *".  */
 273
 274 extern char *re_comp PARAMS ((const char *));
 275
 276 /* From symfile.c */
 277
 278 extern void symbol_file_command PARAMS ((char *, int));
 279
 280 /* From main.c */
 281
 282 extern char *skip_quoted PARAMS ((char *));
 283
 284 extern char *gdb_readline PARAMS ((char *));
 285
 286 extern char *command_line_input PARAMS ((char *, int, char *));
 287
 288 extern void print_prompt PARAMS ((void));
 289
 290 extern int input_from_terminal_p PARAMS ((void));
 291
 292 /* From printcmd.c */
 293
 294 extern void set_next_address PARAMS ((CORE_ADDR));
 295
 296 extern void print_address_symbolic PARAMS ((CORE_ADDR, GDB_FILE *, int,
 297                                             char *));
 298
 299 extern void print_address_numeric PARAMS ((CORE_ADDR, int, GDB_FILE *));
 300
 301 extern void print_address PARAMS ((CORE_ADDR, GDB_FILE *));
 302
 303 /* From source.c */
 304
 305 extern int openp PARAMS ((char *, int, char *, int, int, char **));
 306
 307 extern void mod_path PARAMS ((char *, char **));
 308
 309 extern void directory_command PARAMS ((char *, int));
 310
 311 extern void init_source_path PARAMS ((void));
 312
 313 /* From findvar.c */
 314
 315 extern int read_relative_register_raw_bytes PARAMS ((int, char *));
 316
 317 /* From readline (but not in any readline .h files).  */
 318
 319 extern char *tilde_expand PARAMS ((char *));
 320
 321 /* Control types for commands */
 322
 323 enum misc_command_type
 324 {
 325   ok_command,
 326   end_command,
 327   else_command,
 328   nop_command,
 329 };
 330
 331 enum command_control_type
 332 {
 333   simple_control,
 334   break_control,
 335   continue_control,
 336   while_control,
 337   if_control,
 338   invalid_control
 339 };
 340
 341 /* Structure for saved commands lines
 342    (for breakpoints, defined commands, etc).  */
 343
 344 struct command_line
 345 {
 346   struct command_line *next;
 347   char *line;
 348   enum command_control_type control_type;
 349   int body_count;
 350   struct command_line **body_list;
 351 };
 352
 353 extern struct command_line *read_command_lines PARAMS ((void));
 354
 355 extern void free_command_lines PARAMS ((struct command_line **));
 356
 357 /* String containing the current directory (what getwd would return).  */
 358
 359 extern char *current_directory;
 360
 361 /* Default radixes for input and output.  Only some values supported.  */
 362 extern unsigned input_radix;
 363 extern unsigned output_radix;
 364
 365 /* Possibilities for prettyprint parameters to routines which print
 366    things.  Like enum language, this should be in value.h, but needs
 367    to be here for the same reason.  FIXME:  If we can eliminate this
 368    as an arg to LA_VAL_PRINT, then we can probably move it back to
 369    value.h. */
 370
 371 enum val_prettyprint
 372 {
 373   Val_no_prettyprint = 0,
 374   Val_prettyprint,
 375   /* Use the default setting which the user has specified.  */
 376   Val_pretty_default
 377 };
 378
 379 \f
 380 /* Host machine definition.  This will be a symlink to one of the
 381    xm-*.h files, built by the `configure' script.  */
 382
 383 #include "xm.h"
 384
 385 /* Native machine support.  This will be a symlink to one of the
 386    nm-*.h files, built by the `configure' script.  */
 387
 388 #include "nm.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 PTR mmalloc PARAMS ((PTR, long));
 539
 540 extern PTR mrealloc PARAMS ((PTR, PTR, long));
 541
 542 extern void mfree PARAMS ((PTR, PTR));
 543
 544 extern int mmcheck PARAMS ((PTR, void (*) (void)));
 545
 546 extern int mmtrace PARAMS ((void));
 547
 548 extern int parse_escape PARAMS ((char **));
 549
 550 extern const char * const reg_names[];
 551
 552 /* Message to be printed before the error message, when an error occurs.  */
 553
 554 extern char *error_pre_print;
 555
 556 /* Message to be printed before the warning message, when a warning occurs.  */
 557
 558 extern char *warning_pre_print;
 559
 560 extern NORETURN void error () ATTR_NORETURN;
 561
 562 extern void error_begin PARAMS ((void));
 563
 564 extern NORETURN void fatal () ATTR_NORETURN;
 565
 566 extern NORETURN void exit PARAMS ((int)) ATTR_NORETURN; /* 4.10.4.3 */
 567
 568 extern NORETURN void nomem PARAMS ((long)) ATTR_NORETURN;
 569
 570 /* Reasons for calling return_to_top_level.  */
 571 enum return_reason {
 572   /* User interrupt.  */
 573   RETURN_QUIT,
 574
 575   /* Any other error.  */
 576   RETURN_ERROR
 577 };
 578
 579 #define RETURN_MASK_QUIT (1 << (int)RETURN_QUIT)
 580 #define RETURN_MASK_ERROR (1 << (int)RETURN_ERROR)
 581 #define RETURN_MASK_ALL (RETURN_MASK_QUIT | RETURN_MASK_ERROR)
 582 typedef int return_mask;
 583
 584 extern NORETURN void
 585 return_to_top_level PARAMS ((enum return_reason)) ATTR_NORETURN;
 586
 587 extern int
 588 catch_errors PARAMS ((int (*) (char *), void *, char *, return_mask));
 589
 590 extern void warning_setup PARAMS ((void));
 591
 592 extern void warning ();
 593
 594 /* Global functions from other, non-gdb GNU thingies.
 595    Libiberty thingies are no longer declared here.  We include libiberty.h
 596    above, instead.  */
 597
 598 extern char *getenv PARAMS ((const char *));
 599
 600 /* From other system libraries */
 601
 602 #ifndef PSIGNAL_IN_SIGNAL_H
 603 extern void psignal PARAMS ((unsigned, const char *));
 604 #endif
 605
 606 /* For now, we can't include <stdlib.h> because it conflicts with
 607    "../include/getopt.h".  (FIXME)
 608
 609    However, if a function is defined in the ANSI C standard and a prototype
 610    for that function is defined and visible in any header file in an ANSI
 611    conforming environment, then that prototype must match the definition in
 612    the ANSI standard.  So we can just duplicate them here without conflict,
 613    since they must be the same in all conforming ANSI environments.  If
 614    these cause problems, then the environment is not ANSI conformant. */
 615
 616 #ifdef __STDC__
 617 #include <stddef.h>
 618 #endif
 619
 620 extern int fclose PARAMS ((GDB_FILE *stream));          /* 4.9.5.1 */
 621
 622 extern void perror PARAMS ((const char *));             /* 4.9.10.4 */
 623
 624 extern double atof PARAMS ((const char *nptr));         /* 4.10.1.1 */
 625
 626 extern int atoi PARAMS ((const char *));                /* 4.10.1.2 */
 627
 628 #ifndef MALLOC_INCOMPATIBLE
 629
 630 extern PTR malloc PARAMS ((size_t size));               /* 4.10.3.3 */
 631
 632 extern PTR realloc PARAMS ((void *ptr, size_t size));   /* 4.10.3.4 */
 633
 634 extern void free PARAMS ((void *));                     /* 4.10.3.2 */
 635
 636 #endif  /* MALLOC_INCOMPATIBLE */
 637
 638 extern void
 639 qsort PARAMS ((void *base, size_t nmemb,                /* 4.10.5.2 */
 640                size_t size,
 641                int (*compar)(const void *, const void *)));
 642
 643 #ifndef MEM_FNS_DECLARED        /* Some non-ANSI use void *, not char *.  */
 644 extern PTR memcpy PARAMS ((void *, const void *, size_t));  /* 4.11.2.1 */
 645
 646 extern int memcmp PARAMS ((const void *, const void *, size_t)); /* 4.11.4.1 */
 647 #endif
 648
 649 extern char *strchr PARAMS ((const char *, int));       /* 4.11.5.2 */
 650
 651 extern char *strrchr PARAMS ((const char *, int));      /* 4.11.5.5 */
 652
 653 extern char *strstr PARAMS ((const char *, const char *)); /* 4.11.5.7 */
 654
 655 extern char *strtok PARAMS ((char *, const char *));    /* 4.11.5.8 */
 656
 657 #ifndef MEM_FNS_DECLARED        /* Some non-ANSI use void *, not char *.  */
 658 extern PTR memset PARAMS ((void *, int, size_t));       /* 4.11.6.1 */
 659 #endif
 660
 661 extern char *strerror PARAMS ((int));                   /* 4.11.6.2 */
 662
 663 /* Various possibilities for alloca.  */
 664 #ifndef alloca
 665 # ifdef __GNUC__
 666 #  define alloca __builtin_alloca
 667 # else /* Not GNU C */
 668 #  ifdef sparc
 669 #   include <alloca.h>          /* NOTE:  Doesn't declare alloca() */
 670 #  endif
 671
 672 /* We need to be careful not to declare this in a way which conflicts with
 673    bison.  Bison never declares it as char *, but under various circumstances
 674    (like __hpux) we need to use void *.  */
 675 #  if defined (__STDC__) || defined (__hpux)
 676    extern void *alloca ();
 677 #  else /* Don't use void *.  */
 678    extern char *alloca ();
 679 #  endif /* Don't use void *.  */
 680 # endif /* Not GNU C */
 681 #endif /* alloca not defined */
 682
 683 /* TARGET_BYTE_ORDER and HOST_BYTE_ORDER must be defined to one of these.  */
 684
 685 #if !defined (BIG_ENDIAN)
 686 #define BIG_ENDIAN 4321
 687 #endif
 688
 689 #if !defined (LITTLE_ENDIAN)
 690 #define LITTLE_ENDIAN 1234
 691 #endif
 692
 693 /* Target-system-dependent parameters for GDB. */
 694
 695 /* Target machine definition.  This will be a symlink to one of the
 696    tm-*.h files, built by the `configure' script.  */
 697
 698 #include "tm.h"
 699
 700 /* Number of bits in a char or unsigned char for the target machine.
 701    Just like CHAR_BIT in <limits.h> but describes the target machine.  */
 702 #if !defined (TARGET_CHAR_BIT)
 703 #define TARGET_CHAR_BIT 8
 704 #endif
 705
 706 /* Number of bits in a short or unsigned short for the target machine. */
 707 #if !defined (TARGET_SHORT_BIT)
 708 #define TARGET_SHORT_BIT (2 * TARGET_CHAR_BIT)
 709 #endif
 710
 711 /* Number of bits in an int or unsigned int for the target machine. */
 712 #if !defined (TARGET_INT_BIT)
 713 #define TARGET_INT_BIT (4 * TARGET_CHAR_BIT)
 714 #endif
 715
 716 /* Number of bits in a long or unsigned long for the target machine. */
 717 #if !defined (TARGET_LONG_BIT)
 718 #define TARGET_LONG_BIT (4 * TARGET_CHAR_BIT)
 719 #endif
 720
 721 /* Number of bits in a long long or unsigned long long for the target machine. */
 722 #if !defined (TARGET_LONG_LONG_BIT)
 723 #define TARGET_LONG_LONG_BIT (2 * TARGET_LONG_BIT)
 724 #endif
 725
 726 /* Number of bits in a float for the target machine. */
 727 #if !defined (TARGET_FLOAT_BIT)
 728 #define TARGET_FLOAT_BIT (4 * TARGET_CHAR_BIT)
 729 #endif
 730
 731 /* Number of bits in a double for the target machine. */
 732 #if !defined (TARGET_DOUBLE_BIT)
 733 #define TARGET_DOUBLE_BIT (8 * TARGET_CHAR_BIT)
 734 #endif
 735
 736 /* Number of bits in a long double for the target machine.  */
 737 #if !defined (TARGET_LONG_DOUBLE_BIT)
 738 #define TARGET_LONG_DOUBLE_BIT (2 * TARGET_DOUBLE_BIT)
 739 #endif
 740
 741 /* Number of bits in a "complex" for the target machine. */
 742 #if !defined (TARGET_COMPLEX_BIT)
 743 #define TARGET_COMPLEX_BIT (2 * TARGET_FLOAT_BIT)
 744 #endif
 745
 746 /* Number of bits in a "double complex" for the target machine. */
 747 #if !defined (TARGET_DOUBLE_COMPLEX_BIT)
 748 #define TARGET_DOUBLE_COMPLEX_BIT (2 * TARGET_DOUBLE_BIT)
 749 #endif
 750
 751 /* Number of bits in a pointer for the target machine */
 752 #if !defined (TARGET_PTR_BIT)
 753 #define TARGET_PTR_BIT TARGET_INT_BIT
 754 #endif
 755
 756 /* If we picked up a copy of CHAR_BIT from a configuration file
 757    (which may get it by including <limits.h>) then use it to set
 758    the number of bits in a host char.  If not, use the same size
 759    as the target. */
 760
 761 #if defined (CHAR_BIT)
 762 #define HOST_CHAR_BIT CHAR_BIT
 763 #else
 764 #define HOST_CHAR_BIT TARGET_CHAR_BIT
 765 #endif
 766
 767 /* The bit byte-order has to do just with numbering of bits in
 768    debugging symbols and such.  Conceptually, it's quite separate
 769    from byte/word byte order.  */
 770
 771 #if !defined (BITS_BIG_ENDIAN)
 772 #if TARGET_BYTE_ORDER == BIG_ENDIAN
 773 #define BITS_BIG_ENDIAN 1
 774 #endif /* Big endian.  */
 775
 776 #if TARGET_BYTE_ORDER == LITTLE_ENDIAN
 777 #define BITS_BIG_ENDIAN 0
 778 #endif /* Little endian.  */
 779 #endif /* BITS_BIG_ENDIAN not defined.  */
 780
 781 /* In findvar.c.  */
 782
 783 extern LONGEST extract_signed_integer PARAMS ((void *, int));
 784
 785 extern unsigned LONGEST extract_unsigned_integer PARAMS ((void *, int));
 786
 787 extern CORE_ADDR extract_address PARAMS ((void *, int));
 788
 789 extern void store_signed_integer PARAMS ((void *, int, LONGEST));
 790
 791 extern void store_unsigned_integer PARAMS ((void *, int, unsigned LONGEST));
 792
 793 extern void store_address PARAMS ((void *, int, CORE_ADDR));
 794
 795 extern double extract_floating PARAMS ((void *, int));
 796
 797 extern void store_floating PARAMS ((void *, int, double));
 798 \f
 799 /* On some machines there are bits in addresses which are not really
 800    part of the address, but are used by the kernel, the hardware, etc.
 801    for special purposes.  ADDR_BITS_REMOVE takes out any such bits
 802    so we get a "real" address such as one would find in a symbol
 803    table.  This is used only for addresses of instructions, and even then
 804    I'm not sure it's used in all contexts.  It exists to deal with there
 805    being a few stray bits in the PC which would mislead us, not as some sort
 806    of generic thing to handle alignment or segmentation (it's possible it
 807    should be in TARGET_READ_PC instead).  */
 808 #if !defined (ADDR_BITS_REMOVE)
 809 #define ADDR_BITS_REMOVE(addr) (addr)
 810 #endif /* No ADDR_BITS_REMOVE.  */
 811
 812 /* From valops.c */
 813
 814 extern CORE_ADDR push_bytes PARAMS ((CORE_ADDR, char *, int));
 815
 816 extern CORE_ADDR push_word PARAMS ((CORE_ADDR, unsigned LONGEST));
 817
 818 /* Some parts of gdb might be considered optional, in the sense that they
 819    are not essential for being able to build a working, usable debugger
 820    for a specific environment.  For example, the maintenance commands
 821    are there for the benefit of gdb maintainers.  As another example,
 822    some environments really don't need gdb's that are able to read N
 823    different object file formats.  In order to make it possible (but
 824    not necessarily recommended) to build "stripped down" versions of
 825    gdb, the following defines control selective compilation of those
 826    parts of gdb which can be safely left out when necessary.  Note that
 827    the default is to include everything. */
 828
 829 #ifndef MAINTENANCE_CMDS
 830 #define MAINTENANCE_CMDS 1
 831 #endif
 832
 833 /* Hooks for alternate command interfaces.  */
 834
 835 #ifdef __STDC__
 836 struct symtab;
 837 struct breakpoint;
 838 #endif
 839
 840 extern void (*init_ui_hook) PARAMS ((void));
 841 extern void (*command_loop_hook) PARAMS ((void));
 842 extern void (*fputs_unfiltered_hook) PARAMS ((const char *linebuffer));
 843 extern void (*print_frame_info_listing_hook) PARAMS ((struct symtab *s, int line,
 844                                                int stopline, int noerror));
 845 extern int (*query_hook) PARAMS (());
 846 extern void (*flush_hook) PARAMS ((FILE *stream));
 847 extern void (*create_breakpoint_hook) PARAMS ((struct breakpoint *b));
 848 extern void (*delete_breakpoint_hook) PARAMS ((struct breakpoint *bpt));
 849 extern void (*enable_breakpoint_hook) PARAMS ((struct breakpoint *bpt));
 850 extern void (*disable_breakpoint_hook) PARAMS ((struct breakpoint *bpt));
 851
 852 /* Inhibit window interface if non-zero. */
 853
 854 extern int no_windows;
 855
 856 #endif /* !defined (DEFS_H) */