gdb/defs.h

   1 /* *INDENT-OFF* */ /* ATTRIBUTE_PRINTF confuses indent, avoid running it
   2                       for now.  */
   3 /* Basic, host-specific, and target-specific definitions for GDB.
   4    Copyright (C) 1986, 1988-2005, 2007-2012 Free Software Foundation,
   5    Inc.
   6
   7    This file is part of GDB.
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 3 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  21
  22 #ifndef DEFS_H
  23 #define DEFS_H
  24
  25 #ifdef GDBSERVER
  26 #  error gdbserver should not include gdb/defs.h
  27 #endif
  28
  29 #include "config.h"             /* Generated by configure.  */
  30 #include "build-gnulib/config.h"
  31
  32 #include <sys/types.h>
  33 #include <stdio.h>
  34 #include <errno.h>              /* System call error return status.  */
  35 #include <limits.h>
  36 #include <stdint.h>
  37
  38 /* The libdecnumber library, on which GDB depends, includes a header file
  39    called gstdint.h instead of relying directly on stdint.h.  GDB, on the
  40    other hand, includes stdint.h directly, relying on the fact that gnulib
  41    generates a copy if the system doesn't provide one or if it is missing
  42    some features.  Unfortunately, gstdint.h and stdint.h cannot be included
  43    at the same time, which may happen when we include a file from
  44    libdecnumber.
  45
  46    The following macro definition effectively prevents the inclusion of
  47    gstdint.h, as all the definitions it provides are guarded against
  48    the GCC_GENERATED_STDINT_H macro.  We already have gnulib/stdint.h
  49    included, so it's ok to blank out gstdint.h.  */
  50 #define GCC_GENERATED_STDINT_H 1
  51
  52 #ifdef HAVE_STDDEF_H
  53 #include <stddef.h>
  54 #endif
  55
  56 #ifdef HAVE_UNISTD_H
  57 #include <unistd.h>
  58 #endif
  59
  60 #include <fcntl.h>
  61
  62 /* First include ansidecl.h so we can use the various macro definitions
  63    here and in all subsequent file inclusions.  */
  64
  65 #include "ansidecl.h"
  66
  67 #include "gdb_locale.h"
  68
  69 #include "gdb_wchar.h"
  70
  71 /* For ``enum gdb_signal''.  */
  72 #include "gdb/signals.h"
  73
  74 #include "ui-file.h"
  75
  76 #include "host-defs.h"
  77
  78 /* Just in case they're not defined in stdio.h.  */
  79
  80 #ifndef SEEK_SET
  81 #define SEEK_SET 0
  82 #endif
  83 #ifndef SEEK_CUR
  84 #define SEEK_CUR 1
  85 #endif
  86
  87 /* The O_BINARY flag is defined in fcntl.h on some non-Posix platforms.
  88    It is used as an access modifier in calls to open(), where it acts
  89    similarly to the "b" character in fopen()'s MODE argument.  On Posix
  90    platforms it should be a no-op, so it is defined as 0 here.  This
  91    ensures that the symbol may be used freely elsewhere in gdb.  */
  92
  93 #ifndef O_BINARY
  94 #define O_BINARY 0
  95 #endif
  96
  97 #include <stdarg.h>             /* For va_list.  */
  98
  99 #include "libiberty.h"
 100 #include "hashtab.h"
 101
 102 /* Rather than duplicate all the logic in BFD for figuring out what
 103    types to use (which can be pretty complicated), symply define them
 104    in terms of the corresponding type from BFD.  */
 105
 106 #include "bfd.h"
 107
 108 /* A byte from the program being debugged.  */
 109 typedef bfd_byte gdb_byte;
 110
 111 /* An address in the program being debugged.  Host byte order.  */
 112 typedef bfd_vma CORE_ADDR;
 113
 114 /* The largest CORE_ADDR value.  */
 115 #define CORE_ADDR_MAX (~ (CORE_ADDR) 0)
 116
 117 /* This is to make sure that LONGEST is at least as big as CORE_ADDR.  */
 118
 119 #ifndef LONGEST
 120
 121 #ifdef BFD64
 122
 123 #define LONGEST BFD_HOST_64_BIT
 124 #define ULONGEST BFD_HOST_U_64_BIT
 125
 126 #else /* No BFD64 */
 127
 128 #ifdef CC_HAS_LONG_LONG
 129 #define LONGEST long long
 130 #define ULONGEST unsigned long long
 131 #else
 132 #ifdef BFD_HOST_64_BIT
 133 /* BFD_HOST_64_BIT is defined for some hosts that don't have long long
 134    (e.g. i386-windows) so try it.  */
 135 #define LONGEST BFD_HOST_64_BIT
 136 #define ULONGEST BFD_HOST_U_64_BIT
 137 #else
 138 #define LONGEST long
 139 #define ULONGEST unsigned long
 140 #endif
 141 #endif
 142
 143 #endif /* No BFD64 */
 144
 145 #endif /* ! LONGEST */
 146
 147 #ifndef min
 148 #define min(a, b) ((a) < (b) ? (a) : (b))
 149 #endif
 150 #ifndef max
 151 #define max(a, b) ((a) > (b) ? (a) : (b))
 152 #endif
 153
 154 #include "ptid.h"
 155
 156 /* Enable xdb commands if set.  */
 157 extern int xdb_commands;
 158
 159 /* Enable dbx commands if set.  */
 160 extern int dbx_commands;
 161
 162 /* System root path, used to find libraries etc.  */
 163 extern char *gdb_sysroot;
 164
 165 /* GDB datadir, used to store data files.  */
 166 extern char *gdb_datadir;
 167
 168 /* If non-NULL, the possibly relocated path to python's "lib" directory
 169    specified with --with-python.  */
 170 extern char *python_libdir;
 171
 172 /* Search path for separate debug files.  */
 173 extern char *debug_file_directory;
 174
 175 /* GDB has two methods for handling SIGINT.  When immediate_quit is
 176    nonzero, a SIGINT results in an immediate longjmp out of the signal
 177    handler.  Otherwise, SIGINT simply sets a flag; code that might
 178    take a long time, and which ought to be interruptible, checks this
 179    flag using the QUIT macro.
 180
 181    If GDB is built with Python support, it uses Python's low-level
 182    interface to implement the flag.  This approach makes it possible
 183    for Python and GDB SIGINT handling to coexist seamlessly.
 184
 185    If GDB is built without Python, it instead uses its traditional
 186    variables.  */
 187
 188 /* Clear the quit flag.  */
 189 extern void clear_quit_flag (void);
 190 /* Evaluate to non-zero if the quit flag is set, zero otherwise.  This
 191    will clear the quit flag as a side effect.  */
 192 extern int check_quit_flag (void);
 193 /* Set the quit flag.  */
 194 extern void set_quit_flag (void);
 195
 196 extern int immediate_quit;
 197
 198 extern void quit (void);
 199
 200 /* FIXME: cagney/2000-03-13: It has been suggested that the peformance
 201    benefits of having a ``QUIT'' macro rather than a function are
 202    marginal.  If the overhead of a QUIT function call is proving
 203    significant then its calling frequency should probably be reduced
 204    [kingdon].  A profile analyzing the current situtation is
 205    needed.  */
 206
 207 #define QUIT { \
 208   if (check_quit_flag ()) quit (); \
 209   if (deprecated_interactive_hook) deprecated_interactive_hook (); \
 210 }
 211
 212 /* Languages represented in the symbol table and elsewhere.
 213    This should probably be in language.h, but since enum's can't
 214    be forward declared to satisfy opaque references before their
 215    actual definition, needs to be here.  */
 216
 217 enum language
 218   {
 219     language_unknown,           /* Language not known */
 220     language_auto,              /* Placeholder for automatic setting */
 221     language_c,                 /* C */
 222     language_cplus,             /* C++ */
 223     language_d,                 /* D */
 224     language_go,                /* Go */
 225     language_objc,              /* Objective-C */
 226     language_java,              /* Java */
 227     language_fortran,           /* Fortran */
 228     language_m2,                /* Modula-2 */
 229     language_asm,               /* Assembly language */
 230     language_pascal,            /* Pascal */
 231     language_ada,               /* Ada */
 232     language_opencl,            /* OpenCL */
 233     language_minimal,           /* All other languages, minimal support only */
 234     nr_languages
 235   };
 236
 237 enum precision_type
 238   {
 239     single_precision,
 240     double_precision,
 241     unspecified_precision
 242   };
 243
 244 /* A generic, not quite boolean, enumeration.  */
 245 enum auto_boolean
 246 {
 247   AUTO_BOOLEAN_TRUE,
 248   AUTO_BOOLEAN_FALSE,
 249   AUTO_BOOLEAN_AUTO
 250 };
 251
 252 /* Potential ways that a function can return a value of a given type.  */
 253 enum return_value_convention
 254 {
 255   /* Where the return value has been squeezed into one or more
 256      registers.  */
 257   RETURN_VALUE_REGISTER_CONVENTION,
 258   /* Commonly known as the "struct return convention".  The caller
 259      passes an additional hidden first parameter to the caller.  That
 260      parameter contains the address at which the value being returned
 261      should be stored.  While typically, and historically, used for
 262      large structs, this is convention is applied to values of many
 263      different types.  */
 264   RETURN_VALUE_STRUCT_CONVENTION,
 265   /* Like the "struct return convention" above, but where the ABI
 266      guarantees that the called function stores the address at which
 267      the value being returned is stored in a well-defined location,
 268      such as a register or memory slot in the stack frame.  Don't use
 269      this if the ABI doesn't explicitly guarantees this.  */
 270   RETURN_VALUE_ABI_RETURNS_ADDRESS,
 271   /* Like the "struct return convention" above, but where the ABI
 272      guarantees that the address at which the value being returned is
 273      stored will be available in a well-defined location, such as a
 274      register or memory slot in the stack frame.  Don't use this if
 275      the ABI doesn't explicitly guarantees this.  */
 276   RETURN_VALUE_ABI_PRESERVES_ADDRESS,
 277 };
 278
 279 /* Needed for various prototypes */
 280
 281 struct symtab;
 282 struct breakpoint;
 283 struct frame_info;
 284 struct gdbarch;
 285 struct value;
 286
 287 /* From main.c.  */
 288
 289 /* This really belong in utils.c (path-utils.c?), but it references some
 290    globals that are currently only available to main.c.  */
 291 extern char *relocate_gdb_directory (const char *initial, int flag);
 292
 293 \f
 294 /* Annotation stuff.  */
 295
 296 extern int annotation_level;    /* in stack.c */
 297 \f
 298
 299 /* From regex.c or libc.  BSD 4.4 declares this with the argument type as
 300    "const char *" in unistd.h, so we can't declare the argument
 301    as "char *".  */
 302
 303 extern char *re_comp (const char *);
 304
 305 /* From symfile.c */
 306
 307 extern void symbol_file_command (char *, int);
 308
 309 /* Remote targets may wish to use this as their load function.  */
 310 extern void generic_load (char *name, int from_tty);
 311
 312 /* Report on STREAM the performance of memory transfer operation,
 313    such as 'load'.
 314    DATA_COUNT is the number of bytes transferred.
 315    WRITE_COUNT is the number of separate write operations, or 0,
 316    if that information is not available.
 317    START_TIME is the time at which an operation was started.
 318    END_TIME is the time at which an operation ended.  */
 319 struct timeval;
 320 extern void print_transfer_performance (struct ui_file *stream,
 321                                         unsigned long data_count,
 322                                         unsigned long write_count,
 323                                         const struct timeval *start_time,
 324                                         const struct timeval *end_time);
 325
 326 /* From top.c */
 327
 328 typedef void initialize_file_ftype (void);
 329
 330 extern char *skip_quoted (char *);
 331
 332 extern char *gdb_readline (char *);
 333
 334 extern char *gdb_readline_wrapper (char *);
 335
 336 extern char *command_line_input (char *, int, char *);
 337
 338 extern void print_prompt (void);
 339
 340 extern int input_from_terminal_p (void);
 341
 342 extern int info_verbose;
 343
 344 /* From printcmd.c */
 345
 346 extern void set_next_address (struct gdbarch *, CORE_ADDR);
 347
 348 extern int print_address_symbolic (struct gdbarch *, CORE_ADDR,
 349                                    struct ui_file *, int, char *);
 350
 351 extern int build_address_symbolic (struct gdbarch *,
 352                                    CORE_ADDR addr,
 353                                    int do_demangle,
 354                                    char **name,
 355                                    int *offset,
 356                                    char **filename,
 357                                    int *line,
 358                                    int *unmapped);
 359
 360 extern void print_address (struct gdbarch *, CORE_ADDR, struct ui_file *);
 361 extern const char *pc_prefix (CORE_ADDR);
 362
 363 /* From source.c */
 364
 365 #define OPF_TRY_CWD_FIRST     0x01
 366 #define OPF_SEARCH_IN_PATH    0x02
 367
 368 extern int openp (const char *, int, const char *, int, char **);
 369
 370 extern int source_full_path_of (const char *, char **);
 371
 372 extern void mod_path (char *, char **);
 373
 374 extern void add_path (char *, char **, int);
 375
 376 extern void directory_command (char *, int);
 377
 378 extern void directory_switch (char *, int);
 379
 380 extern char *source_path;
 381
 382 extern void init_source_path (void);
 383
 384 /* From exec.c */
 385
 386 /* Process memory area starting at ADDR with length SIZE.  Area is readable iff
 387    READ is non-zero, writable if WRITE is non-zero, executable if EXEC is
 388    non-zero.  Area is possibly changed against its original file based copy if
 389    MODIFIED is non-zero.  DATA is passed without changes from a caller.  */
 390
 391 typedef int (*find_memory_region_ftype) (CORE_ADDR addr, unsigned long size,
 392                                          int read, int write, int exec,
 393                                          int modified, void *data);
 394
 395 /* Take over the 'find_mapped_memory' vector from exec.c.  */
 396 extern void exec_set_find_memory_regions
 397   (int (*func) (find_memory_region_ftype func, void *data));
 398
 399 /* Possible lvalue types.  Like enum language, this should be in
 400    value.h, but needs to be here for the same reason.  */
 401
 402 enum lval_type
 403   {
 404     /* Not an lval.  */
 405     not_lval,
 406     /* In memory.  */
 407     lval_memory,
 408     /* In a register.  Registers are relative to a frame.  */
 409     lval_register,
 410     /* In a gdb internal variable.  */
 411     lval_internalvar,
 412     /* Part of a gdb internal variable (structure field).  */
 413     lval_internalvar_component,
 414     /* Value's bits are fetched and stored using functions provided by
 415        its creator.  */
 416     lval_computed
 417   };
 418
 419 /* Control types for commands */
 420
 421 enum misc_command_type
 422   {
 423     ok_command,
 424     end_command,
 425     else_command,
 426     nop_command
 427   };
 428
 429 enum command_control_type
 430   {
 431     simple_control,
 432     break_control,
 433     continue_control,
 434     while_control,
 435     if_control,
 436     commands_control,
 437     python_control,
 438     while_stepping_control,
 439     invalid_control
 440   };
 441
 442 /* Structure for saved commands lines
 443    (for breakpoints, defined commands, etc).  */
 444
 445 struct command_line
 446   {
 447     struct command_line *next;
 448     char *line;
 449     enum command_control_type control_type;
 450     /* The number of elements in body_list.  */
 451     int body_count;
 452     /* For composite commands, the nested lists of commands.  For
 453        example, for "if" command this will contain the then branch and
 454        the else branch, if that is available.  */
 455     struct command_line **body_list;
 456   };
 457
 458 extern struct command_line *read_command_lines (char *, int, int,
 459                                                 void (*)(char *, void *),
 460                                                 void *);
 461 extern struct command_line *read_command_lines_1 (char * (*) (void), int,
 462                                                   void (*)(char *, void *),
 463                                                   void *);
 464
 465 extern void free_command_lines (struct command_line **);
 466
 467 /* Parameters of the "info proc" command.  */
 468
 469 enum info_proc_what
 470   {
 471     /* Display the default cmdline, cwd and exe outputs.  */
 472     IP_MINIMAL,
 473
 474     /* Display `info proc mappings'.  */
 475     IP_MAPPINGS,
 476
 477     /* Display `info proc status'.  */
 478     IP_STATUS,
 479
 480     /* Display `info proc stat'.  */
 481     IP_STAT,
 482
 483     /* Display `info proc cmdline'.  */
 484     IP_CMDLINE,
 485
 486     /* Display `info proc exe'.  */
 487     IP_EXE,
 488
 489     /* Display `info proc cwd'.  */
 490     IP_CWD,
 491
 492     /* Display all of the above.  */
 493     IP_ALL
 494   };
 495
 496 /* String containing the current directory (what getwd would return).  */
 497
 498 extern char *current_directory;
 499
 500 /* Default radixes for input and output.  Only some values supported.  */
 501 extern unsigned input_radix;
 502 extern unsigned output_radix;
 503
 504 /* Possibilities for prettyprint parameters to routines which print
 505    things.  Like enum language, this should be in value.h, but needs
 506    to be here for the same reason.  FIXME:  If we can eliminate this
 507    as an arg to LA_VAL_PRINT, then we can probably move it back to
 508    value.h.  */
 509
 510 enum val_prettyprint
 511   {
 512     Val_no_prettyprint = 0,
 513     Val_prettyprint,
 514     /* Use the default setting which the user has specified.  */
 515     Val_pretty_default
 516   };
 517
 518 /* Optional native machine support.  Non-native (and possibly pure
 519    multi-arch) targets do not need a "nm.h" file.  This will be a
 520    symlink to one of the nm-*.h files, built by the `configure'
 521    script.  */
 522
 523 #ifdef GDB_NM_FILE
 524 #include "nm.h"
 525 #endif
 526
 527 /* Assume that fopen accepts the letter "b" in the mode string.
 528    It is demanded by ISO C9X, and should be supported on all
 529    platforms that claim to have a standard-conforming C library.  On
 530    true POSIX systems it will be ignored and have no effect.  There
 531    may still be systems without a standard-conforming C library where
 532    an ISO C9X compiler (GCC) is available.  Known examples are SunOS
 533    4.x and 4.3BSD.  This assumption means these systems are no longer
 534    supported.  */
 535 #ifndef FOPEN_RB
 536 # include "fopen-bin.h"
 537 #endif
 538
 539 /* Defaults for system-wide constants (if not defined by xm.h, we fake it).
 540    FIXME: Assumes 2's complement arithmetic.  */
 541
 542 #if !defined (UINT_MAX)
 543 #define UINT_MAX ((unsigned int)(~0))       /* 0xFFFFFFFF for 32-bits */
 544 #endif
 545
 546 #if !defined (INT_MAX)
 547 #define INT_MAX ((int)(UINT_MAX >> 1))      /* 0x7FFFFFFF for 32-bits */
 548 #endif
 549
 550 #if !defined (INT_MIN)
 551 #define INT_MIN ((int)((int) ~0 ^ INT_MAX)) /* 0x80000000 for 32-bits */
 552 #endif
 553
 554 #if !defined (ULONG_MAX)
 555 #define ULONG_MAX ((unsigned long)(~0L))    /* 0xFFFFFFFF for 32-bits */
 556 #endif
 557
 558 #if !defined (LONG_MAX)
 559 #define LONG_MAX ((long)(ULONG_MAX >> 1))   /* 0x7FFFFFFF for 32-bits */
 560 #endif
 561
 562 #if !defined (ULONGEST_MAX)
 563 #define ULONGEST_MAX (~(ULONGEST)0)        /* 0xFFFFFFFFFFFFFFFF for 64-bits */
 564 #endif
 565
 566 #if !defined (LONGEST_MAX)                 /* 0x7FFFFFFFFFFFFFFF for 64-bits */
 567 #define LONGEST_MAX ((LONGEST)(ULONGEST_MAX >> 1))
 568 #endif
 569
 570 /* Convert a LONGEST to an int.  This is used in contexts (e.g. number of
 571    arguments to a function, number in a value history, register number, etc.)
 572    where the value must not be larger than can fit in an int.  */
 573
 574 extern int longest_to_int (LONGEST);
 575
 576 /* Utility macros to allocate typed memory.  Avoids errors like:
 577    struct foo *foo = xmalloc (sizeof struct bar); and memset (foo,
 578    sizeof (struct foo), 0).  */
 579 #define XZALLOC(TYPE) ((TYPE*) xzalloc (sizeof (TYPE)))
 580 #define XMALLOC(TYPE) ((TYPE*) xmalloc (sizeof (TYPE)))
 581 #define XCALLOC(NMEMB, TYPE) ((TYPE*) xcalloc ((NMEMB), sizeof (TYPE)))
 582
 583 #include "common-utils.h"
 584
 585 /* List of known OS ABIs.  If you change this, make sure to update the
 586    table in osabi.c.  */
 587 enum gdb_osabi
 588 {
 589   GDB_OSABI_UNINITIALIZED = -1, /* For struct gdbarch_info.  */
 590
 591   GDB_OSABI_UNKNOWN = 0,        /* keep this zero */
 592
 593   GDB_OSABI_SVR4,
 594   GDB_OSABI_HURD,
 595   GDB_OSABI_SOLARIS,
 596   GDB_OSABI_OSF1,
 597   GDB_OSABI_LINUX,
 598   GDB_OSABI_FREEBSD_AOUT,
 599   GDB_OSABI_FREEBSD_ELF,
 600   GDB_OSABI_NETBSD_AOUT,
 601   GDB_OSABI_NETBSD_ELF,
 602   GDB_OSABI_OPENBSD_ELF,
 603   GDB_OSABI_WINCE,
 604   GDB_OSABI_GO32,
 605   GDB_OSABI_IRIX,
 606   GDB_OSABI_INTERIX,
 607   GDB_OSABI_HPUX_ELF,
 608   GDB_OSABI_HPUX_SOM,
 609   GDB_OSABI_QNXNTO,
 610   GDB_OSABI_CYGWIN,
 611   GDB_OSABI_AIX,
 612   GDB_OSABI_DICOS,
 613   GDB_OSABI_DARWIN,
 614   GDB_OSABI_SYMBIAN,
 615   GDB_OSABI_OPENVMS,
 616
 617   GDB_OSABI_INVALID             /* keep this last */
 618 };
 619
 620 /* Global functions from other, non-gdb GNU thingies.
 621    Libiberty thingies are no longer declared here.  We include libiberty.h
 622    above, instead.  */
 623
 624 /* From other system libraries */
 625
 626 #ifdef HAVE_STDDEF_H
 627 #include <stddef.h>
 628 #endif
 629
 630 #ifdef HAVE_STDLIB_H
 631 #include <stdlib.h>
 632 #endif
 633 #ifndef min
 634 #define min(a, b) ((a) < (b) ? (a) : (b))
 635 #endif
 636 #ifndef max
 637 #define max(a, b) ((a) > (b) ? (a) : (b))
 638 #endif
 639
 640
 641 #ifndef atof
 642 extern double atof (const char *);      /* X3.159-1989  4.10.1.1 */
 643 #endif
 644
 645 /* Various possibilities for alloca.  */
 646 #ifndef alloca
 647 #ifdef __GNUC__
 648 #define alloca __builtin_alloca
 649 #else /* Not GNU C */
 650 #ifdef HAVE_ALLOCA_H
 651 #include <alloca.h>
 652 #else
 653 #ifdef _AIX
 654 #pragma alloca
 655 #else
 656
 657 /* We need to be careful not to declare this in a way which conflicts with
 658    bison.  Bison never declares it as char *, but under various circumstances
 659    (like __hpux) we need to use void *.  */
 660 extern void *alloca ();
 661 #endif /* Not _AIX */
 662 #endif /* Not HAVE_ALLOCA_H */
 663 #endif /* Not GNU C */
 664 #endif /* alloca not defined */
 665
 666 /* Dynamic target-system-dependent parameters for GDB.  */
 667 #include "gdbarch.h"
 668
 669 /* Maximum size of a register.  Something small, but large enough for
 670    all known ISAs.  If it turns out to be too small, make it bigger.  */
 671
 672 enum { MAX_REGISTER_SIZE = 64 };
 673
 674 /* Static target-system-dependent parameters for GDB.  */
 675
 676 /* Number of bits in a char or unsigned char for the target machine.
 677    Just like CHAR_BIT in <limits.h> but describes the target machine.  */
 678 #if !defined (TARGET_CHAR_BIT)
 679 #define TARGET_CHAR_BIT 8
 680 #endif
 681
 682 /* If we picked up a copy of CHAR_BIT from a configuration file
 683    (which may get it by including <limits.h>) then use it to set
 684    the number of bits in a host char.  If not, use the same size
 685    as the target.  */
 686
 687 #if defined (CHAR_BIT)
 688 #define HOST_CHAR_BIT CHAR_BIT
 689 #else
 690 #define HOST_CHAR_BIT TARGET_CHAR_BIT
 691 #endif
 692
 693 /* In findvar.c.  */
 694
 695 extern LONGEST extract_signed_integer (const gdb_byte *, int,
 696                                        enum bfd_endian);
 697
 698 extern ULONGEST extract_unsigned_integer (const gdb_byte *, int,
 699                                           enum bfd_endian);
 700
 701 extern int extract_long_unsigned_integer (const gdb_byte *, int,
 702                                           enum bfd_endian, LONGEST *);
 703
 704 extern CORE_ADDR extract_typed_address (const gdb_byte *buf,
 705                                         struct type *type);
 706
 707 extern void store_signed_integer (gdb_byte *, int,
 708                                   enum bfd_endian, LONGEST);
 709
 710 extern void store_unsigned_integer (gdb_byte *, int,
 711                                     enum bfd_endian, ULONGEST);
 712
 713 extern void store_typed_address (gdb_byte *buf, struct type *type,
 714                                  CORE_ADDR addr);
 715
 716 \f
 717 /* From valops.c */
 718
 719 extern int watchdog;
 720
 721 /* Hooks for alternate command interfaces.  */
 722
 723 /* The name of the interpreter if specified on the command line.  */
 724 extern char *interpreter_p;
 725
 726 /* If a given interpreter matches INTERPRETER_P then it should update
 727    deprecated_command_loop_hook and deprecated_init_ui_hook with the
 728    per-interpreter implementation.  */
 729 /* FIXME: deprecated_command_loop_hook and deprecated_init_ui_hook
 730    should be moved here.  */
 731
 732 struct target_waitstatus;
 733 struct cmd_list_element;
 734
 735 extern void (*deprecated_pre_add_symbol_hook) (const char *);
 736 extern void (*deprecated_post_add_symbol_hook) (void);
 737 extern void (*selected_frame_level_changed_hook) (int);
 738 extern int (*deprecated_ui_loop_hook) (int signo);
 739 extern void (*deprecated_init_ui_hook) (char *argv0);
 740 extern void (*deprecated_command_loop_hook) (void);
 741 extern void (*deprecated_show_load_progress) (const char *section,
 742                                               unsigned long section_sent,
 743                                               unsigned long section_size,
 744                                               unsigned long total_sent,
 745                                               unsigned long total_size);
 746 extern void (*deprecated_print_frame_info_listing_hook) (struct symtab * s,
 747                                                          int line,
 748                                                          int stopline,
 749                                                          int noerror);
 750 extern int (*deprecated_query_hook) (const char *, va_list)
 751      ATTRIBUTE_FPTR_PRINTF(1,0);
 752 extern void (*deprecated_warning_hook) (const char *, va_list)
 753      ATTRIBUTE_FPTR_PRINTF(1,0);
 754 extern void (*deprecated_flush_hook) (struct ui_file * stream);
 755 extern void (*deprecated_interactive_hook) (void);
 756 extern void (*deprecated_readline_begin_hook) (char *, ...)
 757      ATTRIBUTE_FPTR_PRINTF_1;
 758 extern char *(*deprecated_readline_hook) (char *);
 759 extern void (*deprecated_readline_end_hook) (void);
 760 extern void (*deprecated_register_changed_hook) (int regno);
 761 extern void (*deprecated_context_hook) (int);
 762 extern ptid_t (*deprecated_target_wait_hook) (ptid_t ptid,
 763                                               struct target_waitstatus *status,
 764                                               int options);
 765
 766 extern void (*deprecated_attach_hook) (void);
 767 extern void (*deprecated_detach_hook) (void);
 768 extern void (*deprecated_call_command_hook) (struct cmd_list_element * c,
 769                                              char *cmd, int from_tty);
 770
 771 extern void (*deprecated_set_hook) (struct cmd_list_element * c);
 772
 773 extern int (*deprecated_ui_load_progress_hook) (const char *section,
 774                                                 unsigned long num);
 775
 776 /* Inhibit window interface if non-zero.  */
 777
 778 extern int use_windows;
 779
 780 /* Provide default definitions of PIDGET, TIDGET, and MERGEPID.
 781    The name ``TIDGET'' is a historical accident.  Many uses of TIDGET
 782    in the code actually refer to a lightweight process id, i.e,
 783    something that can be considered a process id in its own right for
 784    certain purposes.  */
 785
 786 #ifndef PIDGET
 787 #define PIDGET(PTID) (ptid_get_pid (PTID))
 788 #define TIDGET(PTID) (ptid_get_lwp (PTID))
 789 #define MERGEPID(PID, TID) ptid_build (PID, TID, 0)
 790 #endif
 791
 792 /* Define well known filenos if the system does not define them.  */
 793 #ifndef STDIN_FILENO
 794 #define STDIN_FILENO   0
 795 #endif
 796 #ifndef STDOUT_FILENO
 797 #define STDOUT_FILENO  1
 798 #endif
 799 #ifndef STDERR_FILENO
 800 #define STDERR_FILENO  2
 801 #endif
 802
 803 /* If this definition isn't overridden by the header files, assume
 804    that isatty and fileno exist on this system.  */
 805 #ifndef ISATTY
 806 #define ISATTY(FP)      (isatty (fileno (FP)))
 807 #endif
 808
 809 /* A width that can achieve a better legibility for GDB MI mode.  */
 810 #define GDB_MI_MSG_WIDTH  80
 811
 812 /* From progspace.c */
 813
 814 extern void initialize_progspace (void);
 815 extern void initialize_inferiors (void);
 816
 817 /* Special block numbers */
 818
 819 enum block_enum
 820 {
 821   GLOBAL_BLOCK = 0,
 822   STATIC_BLOCK = 1,
 823   FIRST_LOCAL_BLOCK = 2
 824 };
 825
 826 #include "utils.h"
 827
 828 #endif /* #ifndef DEFS_H */