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) 1986-2015 Free Software Foundation, Inc.
   5
   6    This file is part of GDB.
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  20
  21 #ifndef DEFS_H
  22 #define DEFS_H
  23
  24 #ifdef GDBSERVER
  25 #  error gdbserver should not include gdb/defs.h
  26 #endif
  27
  28 #include "common-defs.h"
  29
  30 #include <sys/types.h>
  31 #include <limits.h>
  32
  33 /* The libdecnumber library, on which GDB depends, includes a header file
  34    called gstdint.h instead of relying directly on stdint.h.  GDB, on the
  35    other hand, includes stdint.h directly, relying on the fact that gnulib
  36    generates a copy if the system doesn't provide one or if it is missing
  37    some features.  Unfortunately, gstdint.h and stdint.h cannot be included
  38    at the same time, which may happen when we include a file from
  39    libdecnumber.
  40
  41    The following macro definition effectively prevents the inclusion of
  42    gstdint.h, as all the definitions it provides are guarded against
  43    the GCC_GENERATED_STDINT_H macro.  We already have gnulib/stdint.h
  44    included, so it's ok to blank out gstdint.h.  */
  45 #define GCC_GENERATED_STDINT_H 1
  46
  47 #include <unistd.h>
  48
  49 #include <fcntl.h>
  50
  51 #include "gdb_wchar.h"
  52
  53 #include "ui-file.h"
  54
  55 #include "host-defs.h"
  56
  57 /* Scope types enumerator.  List the types of scopes the compiler will
  58    accept.  */
  59
  60 enum compile_i_scope_types
  61   {
  62     COMPILE_I_INVALID_SCOPE,
  63
  64     /* A simple scope.  Wrap an expression into a simple scope that
  65        takes no arguments, returns no value, and uses the generic
  66        function name "_gdb_expr". */
  67
  68     COMPILE_I_SIMPLE_SCOPE,
  69
  70     /* Do not wrap the expression,
  71        it has to provide function "_gdb_expr" on its own.  */
  72     COMPILE_I_RAW_SCOPE,
  73   };
  74
  75 /* Just in case they're not defined in stdio.h.  */
  76
  77 #ifndef SEEK_SET
  78 #define SEEK_SET 0
  79 #endif
  80 #ifndef SEEK_CUR
  81 #define SEEK_CUR 1
  82 #endif
  83
  84 /* The O_BINARY flag is defined in fcntl.h on some non-Posix platforms.
  85    It is used as an access modifier in calls to open(), where it acts
  86    similarly to the "b" character in fopen()'s MODE argument.  On Posix
  87    platforms it should be a no-op, so it is defined as 0 here.  This
  88    ensures that the symbol may be used freely elsewhere in gdb.  */
  89
  90 #ifndef O_BINARY
  91 #define O_BINARY 0
  92 #endif
  93
  94 #include "hashtab.h"
  95
  96 #ifndef min
  97 #define min(a, b) ((a) < (b) ? (a) : (b))
  98 #endif
  99 #ifndef max
 100 #define max(a, b) ((a) > (b) ? (a) : (b))
 101 #endif
 102
 103 /* * Enable dbx commands if set.  */
 104 extern int dbx_commands;
 105
 106 /* * System root path, used to find libraries etc.  */
 107 extern char *gdb_sysroot;
 108
 109 /* * GDB datadir, used to store data files.  */
 110 extern char *gdb_datadir;
 111
 112 /* * If non-NULL, the possibly relocated path to python's "lib" directory
 113    specified with --with-python.  */
 114 extern char *python_libdir;
 115
 116 /* * Search path for separate debug files.  */
 117 extern char *debug_file_directory;
 118
 119 /* GDB has two methods for handling SIGINT.  When immediate_quit is
 120    nonzero, a SIGINT results in an immediate longjmp out of the signal
 121    handler.  Otherwise, SIGINT simply sets a flag; code that might
 122    take a long time, and which ought to be interruptible, checks this
 123    flag using the QUIT macro.
 124
 125    These functions use the extension_language_ops API to allow extension
 126    language(s) and GDB SIGINT handling to coexist seamlessly.  */
 127
 128 /* * Clear the quit flag.  */
 129 extern void clear_quit_flag (void);
 130 /* * Evaluate to non-zero if the quit flag is set, zero otherwise.  This
 131    will clear the quit flag as a side effect.  */
 132 extern int check_quit_flag (void);
 133 /* * Set the quit flag.  */
 134 extern void set_quit_flag (void);
 135
 136 /* Flag that function quit should call quit_force.  */
 137 extern volatile int sync_quit_force_run;
 138
 139 extern int immediate_quit;
 140
 141 extern void quit (void);
 142
 143 /* FIXME: cagney/2000-03-13: It has been suggested that the peformance
 144    benefits of having a ``QUIT'' macro rather than a function are
 145    marginal.  If the overhead of a QUIT function call is proving
 146    significant then its calling frequency should probably be reduced
 147    [kingdon].  A profile analyzing the current situtation is
 148    needed.  */
 149
 150 #define QUIT { \
 151   if (check_quit_flag () || sync_quit_force_run) quit (); \
 152   if (deprecated_interactive_hook) deprecated_interactive_hook (); \
 153 }
 154
 155 /* * Languages represented in the symbol table and elsewhere.
 156    This should probably be in language.h, but since enum's can't
 157    be forward declared to satisfy opaque references before their
 158    actual definition, needs to be here.  */
 159
 160 enum language
 161   {
 162     language_unknown,           /* Language not known */
 163     language_auto,              /* Placeholder for automatic setting */
 164     language_c,                 /* C */
 165     language_cplus,             /* C++ */
 166     language_d,                 /* D */
 167     language_go,                /* Go */
 168     language_objc,              /* Objective-C */
 169     language_java,              /* Java */
 170     language_fortran,           /* Fortran */
 171     language_m2,                /* Modula-2 */
 172     language_asm,               /* Assembly language */
 173     language_pascal,            /* Pascal */
 174     language_ada,               /* Ada */
 175     language_opencl,            /* OpenCL */
 176     language_minimal,           /* All other languages, minimal support only */
 177     nr_languages
 178   };
 179
 180 enum precision_type
 181   {
 182     single_precision,
 183     double_precision,
 184     unspecified_precision
 185   };
 186
 187 /* * A generic, not quite boolean, enumeration.  This is used for
 188    set/show commands in which the options are on/off/automatic.  */
 189 enum auto_boolean
 190 {
 191   AUTO_BOOLEAN_TRUE,
 192   AUTO_BOOLEAN_FALSE,
 193   AUTO_BOOLEAN_AUTO
 194 };
 195
 196 /* * Potential ways that a function can return a value of a given
 197    type.  */
 198
 199 enum return_value_convention
 200 {
 201   /* * Where the return value has been squeezed into one or more
 202      registers.  */
 203   RETURN_VALUE_REGISTER_CONVENTION,
 204   /* * Commonly known as the "struct return convention".  The caller
 205      passes an additional hidden first parameter to the caller.  That
 206      parameter contains the address at which the value being returned
 207      should be stored.  While typically, and historically, used for
 208      large structs, this is convention is applied to values of many
 209      different types.  */
 210   RETURN_VALUE_STRUCT_CONVENTION,
 211   /* * Like the "struct return convention" above, but where the ABI
 212      guarantees that the called function stores the address at which
 213      the value being returned is stored in a well-defined location,
 214      such as a register or memory slot in the stack frame.  Don't use
 215      this if the ABI doesn't explicitly guarantees this.  */
 216   RETURN_VALUE_ABI_RETURNS_ADDRESS,
 217   /* * Like the "struct return convention" above, but where the ABI
 218      guarantees that the address at which the value being returned is
 219      stored will be available in a well-defined location, such as a
 220      register or memory slot in the stack frame.  Don't use this if
 221      the ABI doesn't explicitly guarantees this.  */
 222   RETURN_VALUE_ABI_PRESERVES_ADDRESS,
 223 };
 224
 225 /* Needed for various prototypes */
 226
 227 struct symtab;
 228 struct breakpoint;
 229 struct frame_info;
 230 struct gdbarch;
 231 struct value;
 232
 233 /* From main.c.  */
 234
 235 /* This really belong in utils.c (path-utils.c?), but it references some
 236    globals that are currently only available to main.c.  */
 237 extern char *relocate_gdb_directory (const char *initial, int flag);
 238
 239 \f
 240 /* Annotation stuff.  */
 241
 242 extern int annotation_level;    /* in stack.c */
 243 \f
 244
 245 /* From regex.c or libc.  BSD 4.4 declares this with the argument type as
 246    "const char *" in unistd.h, so we can't declare the argument
 247    as "char *".  */
 248
 249 EXTERN_C char *re_comp (const char *);
 250
 251 /* From symfile.c */
 252
 253 extern void symbol_file_command (char *, int);
 254
 255 /* * Remote targets may wish to use this as their load function.  */
 256 extern void generic_load (const char *name, int from_tty);
 257
 258 /* * Report on STREAM the performance of memory transfer operation,
 259    such as 'load'.
 260    @param DATA_COUNT is the number of bytes transferred.
 261    @param WRITE_COUNT is the number of separate write operations, or 0,
 262    if that information is not available.
 263    @param START_TIME is the time at which an operation was started.
 264    @param END_TIME is the time at which an operation ended.  */
 265 struct timeval;
 266 extern void print_transfer_performance (struct ui_file *stream,
 267                                         unsigned long data_count,
 268                                         unsigned long write_count,
 269                                         const struct timeval *start_time,
 270                                         const struct timeval *end_time);
 271
 272 /* From top.c */
 273
 274 typedef void initialize_file_ftype (void);
 275
 276 extern char *gdb_readline (const char *);
 277
 278 extern char *gdb_readline_wrapper (const char *);
 279
 280 extern char *command_line_input (const char *, int, char *);
 281
 282 extern void print_prompt (void);
 283
 284 extern int input_from_terminal_p (void);
 285
 286 extern int info_verbose;
 287
 288 /* From printcmd.c */
 289
 290 extern void set_next_address (struct gdbarch *, CORE_ADDR);
 291
 292 extern int print_address_symbolic (struct gdbarch *, CORE_ADDR,
 293                                    struct ui_file *, int, char *);
 294
 295 extern int build_address_symbolic (struct gdbarch *,
 296                                    CORE_ADDR addr,
 297                                    int do_demangle,
 298                                    char **name,
 299                                    int *offset,
 300                                    char **filename,
 301                                    int *line,
 302                                    int *unmapped);
 303
 304 extern void print_address (struct gdbarch *, CORE_ADDR, struct ui_file *);
 305 extern const char *pc_prefix (CORE_ADDR);
 306
 307 /* From source.c */
 308
 309 /* See openp function definition for their description.  */
 310 #define OPF_TRY_CWD_FIRST     0x01
 311 #define OPF_SEARCH_IN_PATH    0x02
 312 #define OPF_RETURN_REALPATH   0x04
 313
 314 extern int openp (const char *, int, const char *, int, char **);
 315
 316 extern int source_full_path_of (const char *, char **);
 317
 318 extern void mod_path (char *, char **);
 319
 320 extern void add_path (char *, char **, int);
 321
 322 extern void directory_switch (char *, int);
 323
 324 extern char *source_path;
 325
 326 extern void init_source_path (void);
 327
 328 /* From exec.c */
 329
 330 /* * Process memory area starting at ADDR with length SIZE.  Area is
 331    readable iff READ is non-zero, writable if WRITE is non-zero,
 332    executable if EXEC is non-zero.  Area is possibly changed against
 333    its original file based copy if MODIFIED is non-zero.  DATA is
 334    passed without changes from a caller.  */
 335
 336 typedef int (*find_memory_region_ftype) (CORE_ADDR addr, unsigned long size,
 337                                          int read, int write, int exec,
 338                                          int modified, void *data);
 339
 340 /* * Possible lvalue types.  Like enum language, this should be in
 341    value.h, but needs to be here for the same reason.  */
 342
 343 enum lval_type
 344   {
 345     /* * Not an lval.  */
 346     not_lval,
 347     /* * In memory.  */
 348     lval_memory,
 349     /* * In a register.  Registers are relative to a frame.  */
 350     lval_register,
 351     /* * In a gdb internal variable.  */
 352     lval_internalvar,
 353     /* * Value encapsulates a callable defined in an extension language.  */
 354     lval_xcallable,
 355     /* * Part of a gdb internal variable (structure field).  */
 356     lval_internalvar_component,
 357     /* * Value's bits are fetched and stored using functions provided
 358        by its creator.  */
 359     lval_computed
 360   };
 361
 362 /* * Control types for commands.  */
 363
 364 enum misc_command_type
 365   {
 366     ok_command,
 367     end_command,
 368     else_command,
 369     nop_command
 370   };
 371
 372 enum command_control_type
 373   {
 374     simple_control,
 375     break_control,
 376     continue_control,
 377     while_control,
 378     if_control,
 379     commands_control,
 380     python_control,
 381     compile_control,
 382     guile_control,
 383     while_stepping_control,
 384     invalid_control
 385   };
 386
 387 /* * Structure for saved commands lines (for breakpoints, defined
 388    commands, etc).  */
 389
 390 struct command_line
 391   {
 392     struct command_line *next;
 393     char *line;
 394     enum command_control_type control_type;
 395     union
 396       {
 397         struct
 398           {
 399             enum compile_i_scope_types scope;
 400           }
 401         compile;
 402       }
 403     control_u;
 404     /* * The number of elements in body_list.  */
 405     int body_count;
 406     /* * For composite commands, the nested lists of commands.  For
 407        example, for "if" command this will contain the then branch and
 408        the else branch, if that is available.  */
 409     struct command_line **body_list;
 410   };
 411
 412 extern struct command_line *read_command_lines (char *, int, int,
 413                                                 void (*)(char *, void *),
 414                                                 void *);
 415 extern struct command_line *read_command_lines_1 (char * (*) (void), int,
 416                                                   void (*)(char *, void *),
 417                                                   void *);
 418
 419 extern void free_command_lines (struct command_line **);
 420
 421 /* * Parameters of the "info proc" command.  */
 422
 423 enum info_proc_what
 424   {
 425     /* * Display the default cmdline, cwd and exe outputs.  */
 426     IP_MINIMAL,
 427
 428     /* * Display `info proc mappings'.  */
 429     IP_MAPPINGS,
 430
 431     /* * Display `info proc status'.  */
 432     IP_STATUS,
 433
 434     /* * Display `info proc stat'.  */
 435     IP_STAT,
 436
 437     /* * Display `info proc cmdline'.  */
 438     IP_CMDLINE,
 439
 440     /* * Display `info proc exe'.  */
 441     IP_EXE,
 442
 443     /* * Display `info proc cwd'.  */
 444     IP_CWD,
 445
 446     /* * Display all of the above.  */
 447     IP_ALL
 448   };
 449
 450 /* * String containing the current directory (what getwd would return).  */
 451
 452 extern char *current_directory;
 453
 454 /* * Default radixes for input and output.  Only some values supported.  */
 455 extern unsigned input_radix;
 456 extern unsigned output_radix;
 457
 458 /* * Possibilities for prettyformat parameters to routines which print
 459    things.  Like enum language, this should be in value.h, but needs
 460    to be here for the same reason.  FIXME:  If we can eliminate this
 461    as an arg to LA_VAL_PRINT, then we can probably move it back to
 462    value.h.  */
 463
 464 enum val_prettyformat
 465   {
 466     Val_no_prettyformat = 0,
 467     Val_prettyformat,
 468     /* * Use the default setting which the user has specified.  */
 469     Val_prettyformat_default
 470   };
 471
 472 /* * Optional native machine support.  Non-native (and possibly pure
 473    multi-arch) targets do not need a "nm.h" file.  This will be a
 474    symlink to one of the nm-*.h files, built by the `configure'
 475    script.  */
 476
 477 #ifdef GDB_NM_FILE
 478 #include "nm.h"
 479 #endif
 480
 481 /* Assume that fopen accepts the letter "b" in the mode string.
 482    It is demanded by ISO C9X, and should be supported on all
 483    platforms that claim to have a standard-conforming C library.  On
 484    true POSIX systems it will be ignored and have no effect.  There
 485    may still be systems without a standard-conforming C library where
 486    an ISO C9X compiler (GCC) is available.  Known examples are SunOS
 487    4.x and 4.3BSD.  This assumption means these systems are no longer
 488    supported.  */
 489 #ifndef FOPEN_RB
 490 # include "fopen-bin.h"
 491 #endif
 492
 493 /* Defaults for system-wide constants (if not defined by xm.h, we fake it).
 494    FIXME: Assumes 2's complement arithmetic.  */
 495
 496 #if !defined (UINT_MAX)
 497 #define UINT_MAX ((unsigned int)(~0))       /* 0xFFFFFFFF for 32-bits */
 498 #endif
 499
 500 #if !defined (INT_MAX)
 501 #define INT_MAX ((int)(UINT_MAX >> 1))      /* 0x7FFFFFFF for 32-bits */
 502 #endif
 503
 504 #if !defined (INT_MIN)
 505 #define INT_MIN ((int)((int) ~0 ^ INT_MAX)) /* 0x80000000 for 32-bits */
 506 #endif
 507
 508 #if !defined (ULONG_MAX)
 509 #define ULONG_MAX ((unsigned long)(~0L))    /* 0xFFFFFFFF for 32-bits */
 510 #endif
 511
 512 #if !defined (LONG_MAX)
 513 #define LONG_MAX ((long)(ULONG_MAX >> 1))   /* 0x7FFFFFFF for 32-bits */
 514 #endif
 515
 516 #if !defined (ULONGEST_MAX)
 517 #define ULONGEST_MAX (~(ULONGEST)0)        /* 0xFFFFFFFFFFFFFFFF for 64-bits */
 518 #endif
 519
 520 #if !defined (LONGEST_MAX)                 /* 0x7FFFFFFFFFFFFFFF for 64-bits */
 521 #define LONGEST_MAX ((LONGEST)(ULONGEST_MAX >> 1))
 522 #endif
 523
 524 /* * Convert a LONGEST to an int.  This is used in contexts (e.g. number of
 525    arguments to a function, number in a value history, register number, etc.)
 526    where the value must not be larger than can fit in an int.  */
 527
 528 extern int longest_to_int (LONGEST);
 529
 530 /* * List of known OS ABIs.  If you change this, make sure to update the
 531    table in osabi.c.  */
 532 enum gdb_osabi
 533 {
 534   GDB_OSABI_UNINITIALIZED = -1, /* For struct gdbarch_info.  */
 535
 536   GDB_OSABI_UNKNOWN = 0,        /* keep this zero */
 537
 538   GDB_OSABI_SVR4,
 539   GDB_OSABI_HURD,
 540   GDB_OSABI_SOLARIS,
 541   GDB_OSABI_LINUX,
 542   GDB_OSABI_FREEBSD_AOUT,
 543   GDB_OSABI_FREEBSD_ELF,
 544   GDB_OSABI_NETBSD_AOUT,
 545   GDB_OSABI_NETBSD_ELF,
 546   GDB_OSABI_OPENBSD_ELF,
 547   GDB_OSABI_WINCE,
 548   GDB_OSABI_GO32,
 549   GDB_OSABI_IRIX,
 550   GDB_OSABI_HPUX_ELF,
 551   GDB_OSABI_HPUX_SOM,
 552   GDB_OSABI_QNXNTO,
 553   GDB_OSABI_CYGWIN,
 554   GDB_OSABI_AIX,
 555   GDB_OSABI_DICOS,
 556   GDB_OSABI_DARWIN,
 557   GDB_OSABI_SYMBIAN,
 558   GDB_OSABI_OPENVMS,
 559   GDB_OSABI_LYNXOS178,
 560   GDB_OSABI_NEWLIB,
 561   GDB_OSABI_SDE,
 562
 563   GDB_OSABI_INVALID             /* keep this last */
 564 };
 565
 566 /* Global functions from other, non-gdb GNU thingies.
 567    Libiberty thingies are no longer declared here.  We include libiberty.h
 568    above, instead.  */
 569
 570 /* From other system libraries */
 571
 572 #ifndef atof
 573 extern double atof (const char *);      /* X3.159-1989  4.10.1.1 */
 574 #endif
 575
 576 /* Dynamic target-system-dependent parameters for GDB.  */
 577 #include "gdbarch.h"
 578
 579 /* * Maximum size of a register.  Something small, but large enough for
 580    all known ISAs.  If it turns out to be too small, make it bigger.  */
 581
 582 enum { MAX_REGISTER_SIZE = 64 };
 583
 584 /* Static target-system-dependent parameters for GDB.  */
 585
 586 /* * Number of bits in a char or unsigned char for the target machine.
 587    Just like CHAR_BIT in <limits.h> but describes the target machine.  */
 588 #if !defined (TARGET_CHAR_BIT)
 589 #define TARGET_CHAR_BIT 8
 590 #endif
 591
 592 /* * If we picked up a copy of CHAR_BIT from a configuration file
 593    (which may get it by including <limits.h>) then use it to set
 594    the number of bits in a host char.  If not, use the same size
 595    as the target.  */
 596
 597 #if defined (CHAR_BIT)
 598 #define HOST_CHAR_BIT CHAR_BIT
 599 #else
 600 #define HOST_CHAR_BIT TARGET_CHAR_BIT
 601 #endif
 602
 603 /* In findvar.c.  */
 604
 605 extern LONGEST extract_signed_integer (const gdb_byte *, int,
 606                                        enum bfd_endian);
 607
 608 extern ULONGEST extract_unsigned_integer (const gdb_byte *, int,
 609                                           enum bfd_endian);
 610
 611 extern int extract_long_unsigned_integer (const gdb_byte *, int,
 612                                           enum bfd_endian, LONGEST *);
 613
 614 extern CORE_ADDR extract_typed_address (const gdb_byte *buf,
 615                                         struct type *type);
 616
 617 extern void store_signed_integer (gdb_byte *, int,
 618                                   enum bfd_endian, LONGEST);
 619
 620 extern void store_unsigned_integer (gdb_byte *, int,
 621                                     enum bfd_endian, ULONGEST);
 622
 623 extern void store_typed_address (gdb_byte *buf, struct type *type,
 624                                  CORE_ADDR addr);
 625
 626 \f
 627 /* From valops.c */
 628
 629 extern int watchdog;
 630
 631 /* Hooks for alternate command interfaces.  */
 632
 633 /* * The name of the interpreter if specified on the command line.  */
 634 extern char *interpreter_p;
 635
 636 /* If a given interpreter matches INTERPRETER_P then it should update
 637    deprecated_init_ui_hook with the per-interpreter implementation.  */
 638 /* FIXME: deprecated_init_ui_hook should be moved here.  */
 639
 640 struct target_waitstatus;
 641 struct cmd_list_element;
 642
 643 extern void (*deprecated_pre_add_symbol_hook) (const char *);
 644 extern void (*deprecated_post_add_symbol_hook) (void);
 645 extern void (*selected_frame_level_changed_hook) (int);
 646 extern int (*deprecated_ui_loop_hook) (int signo);
 647 extern void (*deprecated_init_ui_hook) (char *argv0);
 648 extern void (*deprecated_show_load_progress) (const char *section,
 649                                               unsigned long section_sent,
 650                                               unsigned long section_size,
 651                                               unsigned long total_sent,
 652                                               unsigned long total_size);
 653 extern void (*deprecated_print_frame_info_listing_hook) (struct symtab * s,
 654                                                          int line,
 655                                                          int stopline,
 656                                                          int noerror);
 657 extern int (*deprecated_query_hook) (const char *, va_list)
 658      ATTRIBUTE_FPTR_PRINTF(1,0);
 659 extern void (*deprecated_warning_hook) (const char *, va_list)
 660      ATTRIBUTE_FPTR_PRINTF(1,0);
 661 extern void (*deprecated_interactive_hook) (void);
 662 extern void (*deprecated_readline_begin_hook) (char *, ...)
 663      ATTRIBUTE_FPTR_PRINTF_1;
 664 extern char *(*deprecated_readline_hook) (const char *);
 665 extern void (*deprecated_readline_end_hook) (void);
 666 extern void (*deprecated_register_changed_hook) (int regno);
 667 extern void (*deprecated_context_hook) (int);
 668 extern ptid_t (*deprecated_target_wait_hook) (ptid_t ptid,
 669                                               struct target_waitstatus *status,
 670                                               int options);
 671
 672 extern void (*deprecated_attach_hook) (void);
 673 extern void (*deprecated_detach_hook) (void);
 674 extern void (*deprecated_call_command_hook) (struct cmd_list_element * c,
 675                                              char *cmd, int from_tty);
 676
 677 extern int (*deprecated_ui_load_progress_hook) (const char *section,
 678                                                 unsigned long num);
 679
 680 /* If this definition isn't overridden by the header files, assume
 681    that isatty and fileno exist on this system.  */
 682 #ifndef ISATTY
 683 #define ISATTY(FP)      (isatty (fileno (FP)))
 684 #endif
 685
 686 /* * A width that can achieve a better legibility for GDB MI mode.  */
 687 #define GDB_MI_MSG_WIDTH  80
 688
 689 /* From progspace.c */
 690
 691 extern void initialize_progspace (void);
 692 extern void initialize_inferiors (void);
 693
 694 /* * Special block numbers */
 695
 696 enum block_enum
 697 {
 698   GLOBAL_BLOCK = 0,
 699   STATIC_BLOCK = 1,
 700   FIRST_LOCAL_BLOCK = 2
 701 };
 702
 703 #include "utils.h"
 704
 705 #endif /* #ifndef DEFS_H */