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) 1986-2017 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 #include "common/enum-flags.h"
  57
  58 /* Scope types enumerator.  List the types of scopes the compiler will
  59    accept.  */
  60
  61 enum compile_i_scope_types
  62   {
  63     COMPILE_I_INVALID_SCOPE,
  64
  65     /* A simple scope.  Wrap an expression into a simple scope that
  66        takes no arguments, returns no value, and uses the generic
  67        function name "_gdb_expr". */
  68
  69     COMPILE_I_SIMPLE_SCOPE,
  70
  71     /* Do not wrap the expression,
  72        it has to provide function "_gdb_expr" on its own.  */
  73     COMPILE_I_RAW_SCOPE,
  74
  75     /* A printable expression scope.  Wrap an expression into a scope
  76        suitable for the "compile print" command.  It uses the generic
  77        function name "_gdb_expr".  COMPILE_I_PRINT_ADDRESS_SCOPE variant
  78        is the usual one, taking address of the object.
  79        COMPILE_I_PRINT_VALUE_SCOPE is needed for arrays where the array
  80        name already specifies its address.  See get_out_value_type.  */
  81     COMPILE_I_PRINT_ADDRESS_SCOPE,
  82     COMPILE_I_PRINT_VALUE_SCOPE,
  83   };
  84
  85
  86 template<typename T>
  87 using RequireLongest = gdb::Requires<gdb::Or<std::is_same<T, LONGEST>,
  88                                              std::is_same<T, ULONGEST>>>;
  89
  90 /* Just in case they're not defined in stdio.h.  */
  91
  92 #ifndef SEEK_SET
  93 #define SEEK_SET 0
  94 #endif
  95 #ifndef SEEK_CUR
  96 #define SEEK_CUR 1
  97 #endif
  98
  99 /* The O_BINARY flag is defined in fcntl.h on some non-Posix platforms.
 100    It is used as an access modifier in calls to open(), where it acts
 101    similarly to the "b" character in fopen()'s MODE argument.  On Posix
 102    platforms it should be a no-op, so it is defined as 0 here.  This
 103    ensures that the symbol may be used freely elsewhere in gdb.  */
 104
 105 #ifndef O_BINARY
 106 #define O_BINARY 0
 107 #endif
 108
 109 #include "hashtab.h"
 110
 111 /* * Enable dbx commands if set.  */
 112 extern int dbx_commands;
 113
 114 /* * System root path, used to find libraries etc.  */
 115 extern char *gdb_sysroot;
 116
 117 /* * GDB datadir, used to store data files.  */
 118 extern char *gdb_datadir;
 119
 120 /* * If non-NULL, the possibly relocated path to python's "lib" directory
 121    specified with --with-python.  */
 122 extern char *python_libdir;
 123
 124 /* * Search path for separate debug files.  */
 125 extern char *debug_file_directory;
 126
 127 /* GDB's SIGINT handler basically sets a flag; code that might take a
 128    long time before it gets back to the event loop, and which ought to
 129    be interruptible, checks this flag using the QUIT macro, which, if
 130    GDB has the terminal, throws a quit exception.
 131
 132    In addition to setting a flag, the SIGINT handler also marks a
 133    select/poll-able file descriptor as read-ready.  That is used by
 134    interruptible_select in order to support interrupting blocking I/O
 135    in a race-free manner.
 136
 137    These functions use the extension_language_ops API to allow extension
 138    language(s) and GDB SIGINT handling to coexist seamlessly.  */
 139
 140 /* * Evaluate to non-zero if the quit flag is set, zero otherwise.  This
 141    will clear the quit flag as a side effect.  */
 142 extern int check_quit_flag (void);
 143 /* * Set the quit flag.  */
 144 extern void set_quit_flag (void);
 145
 146 /* The current quit handler (and its type).  This is called from the
 147    QUIT macro.  See default_quit_handler below for default behavior.
 148    Parts of GDB temporarily override this to e.g., completely suppress
 149    Ctrl-C because it would not be safe to throw.  E.g., normally, you
 150    wouldn't want to quit between a RSP command and its response, as
 151    that would break the communication with the target, but you may
 152    still want to intercept the Ctrl-C and offer to disconnect if the
 153    user presses Ctrl-C multiple times while the target is stuck
 154    waiting for the wedged remote stub.  */
 155 typedef void (quit_handler_ftype) (void);
 156 extern quit_handler_ftype *quit_handler;
 157
 158 /* The default quit handler.  Checks whether Ctrl-C was pressed, and
 159    if so:
 160
 161      - If GDB owns the terminal, throws a quit exception.
 162
 163      - If GDB does not own the terminal, forwards the Ctrl-C to the
 164        target.
 165 */
 166 extern void default_quit_handler (void);
 167
 168 /* Flag that function quit should call quit_force.  */
 169 extern volatile int sync_quit_force_run;
 170
 171 extern void quit (void);
 172
 173 /* Helper for the QUIT macro.  */
 174
 175 extern void maybe_quit (void);
 176
 177 /* Check whether a Ctrl-C was typed, and if so, call the current quit
 178    handler.  */
 179 #define QUIT maybe_quit ()
 180
 181 /* Set the serial event associated with the quit flag.  */
 182 extern void quit_serial_event_set (void);
 183
 184 /* Clear the serial event associated with the quit flag.  */
 185 extern void quit_serial_event_clear (void);
 186
 187 /* * Languages represented in the symbol table and elsewhere.
 188    This should probably be in language.h, but since enum's can't
 189    be forward declared to satisfy opaque references before their
 190    actual definition, needs to be here.
 191
 192    The constants here are in priority order.  In particular,
 193    demangling is attempted according to this order.
 194
 195    Note that there's ambiguity between the mangling schemes of some of
 196    these languages, so some symbols could be successfully demangled by
 197    several languages.  For that reason, the constants here are sorted
 198    in the order we'll attempt demangling them.  For example: Rust uses
 199    C++ mangling, so must come after C++; Ada must come last (see
 200    ada_sniff_from_mangled_name).  (Keep this order in sync with the
 201    'languages' array in language.c.)  */
 202
 203 enum language
 204   {
 205     language_unknown,           /* Language not known */
 206     language_auto,              /* Placeholder for automatic setting */
 207     language_c,                 /* C */
 208     language_objc,              /* Objective-C */
 209     language_cplus,             /* C++ */
 210     language_d,                 /* D */
 211     language_go,                /* Go */
 212     language_fortran,           /* Fortran */
 213     language_m2,                /* Modula-2 */
 214     language_asm,               /* Assembly language */
 215     language_pascal,            /* Pascal */
 216     language_opencl,            /* OpenCL */
 217     language_rust,              /* Rust */
 218     language_minimal,           /* All other languages, minimal support only */
 219     language_ada,               /* Ada */
 220     nr_languages
 221   };
 222
 223 /* The number of bits needed to represent all languages, with enough
 224    padding to allow for reasonable growth.  */
 225 #define LANGUAGE_BITS 5
 226 gdb_static_assert (nr_languages <= (1 << LANGUAGE_BITS));
 227
 228 enum precision_type
 229   {
 230     single_precision,
 231     double_precision,
 232     unspecified_precision
 233   };
 234
 235 /* * A generic, not quite boolean, enumeration.  This is used for
 236    set/show commands in which the options are on/off/automatic.  */
 237 enum auto_boolean
 238 {
 239   AUTO_BOOLEAN_TRUE,
 240   AUTO_BOOLEAN_FALSE,
 241   AUTO_BOOLEAN_AUTO
 242 };
 243
 244 /* * Potential ways that a function can return a value of a given
 245    type.  */
 246
 247 enum return_value_convention
 248 {
 249   /* * Where the return value has been squeezed into one or more
 250      registers.  */
 251   RETURN_VALUE_REGISTER_CONVENTION,
 252   /* * Commonly known as the "struct return convention".  The caller
 253      passes an additional hidden first parameter to the caller.  That
 254      parameter contains the address at which the value being returned
 255      should be stored.  While typically, and historically, used for
 256      large structs, this is convention is applied to values of many
 257      different types.  */
 258   RETURN_VALUE_STRUCT_CONVENTION,
 259   /* * Like the "struct return convention" above, but where the ABI
 260      guarantees that the called function stores the address at which
 261      the value being returned is stored in a well-defined location,
 262      such as a register or memory slot in the stack frame.  Don't use
 263      this if the ABI doesn't explicitly guarantees this.  */
 264   RETURN_VALUE_ABI_RETURNS_ADDRESS,
 265   /* * Like the "struct return convention" above, but where the ABI
 266      guarantees that the address at which the value being returned is
 267      stored will be available in a well-defined location, such as a
 268      register or memory slot in the stack frame.  Don't use this if
 269      the ABI doesn't explicitly guarantees this.  */
 270   RETURN_VALUE_ABI_PRESERVES_ADDRESS,
 271 };
 272
 273 /* Needed for various prototypes */
 274
 275 struct symtab;
 276 struct breakpoint;
 277 struct frame_info;
 278 struct gdbarch;
 279 struct value;
 280
 281 /* From main.c.  */
 282
 283 /* This really belong in utils.c (path-utils.c?), but it references some
 284    globals that are currently only available to main.c.  */
 285 extern char *relocate_gdb_directory (const char *initial, int flag);
 286
 287 \f
 288 /* Annotation stuff.  */
 289
 290 extern int annotation_level;    /* in stack.c */
 291 \f
 292
 293 /* From regex.c or libc.  BSD 4.4 declares this with the argument type as
 294    "const char *" in unistd.h, so we can't declare the argument
 295    as "char *".  */
 296
 297 EXTERN_C char *re_comp (const char *);
 298
 299 /* From symfile.c */
 300
 301 extern void symbol_file_command (const char *, int);
 302
 303 /* * Remote targets may wish to use this as their load function.  */
 304 extern void generic_load (const char *name, int from_tty);
 305
 306 /* From top.c */
 307
 308 typedef void initialize_file_ftype (void);
 309
 310 extern char *gdb_readline_wrapper (const char *);
 311
 312 extern char *command_line_input (const char *, int, const char *);
 313
 314 extern void print_prompt (void);
 315
 316 struct ui;
 317
 318 extern int input_interactive_p (struct ui *);
 319
 320 extern int info_verbose;
 321
 322 /* From printcmd.c */
 323
 324 extern void set_next_address (struct gdbarch *, CORE_ADDR);
 325
 326 extern int print_address_symbolic (struct gdbarch *, CORE_ADDR,
 327                                    struct ui_file *, int,
 328                                    const char *);
 329
 330 extern int build_address_symbolic (struct gdbarch *,
 331                                    CORE_ADDR addr,
 332                                    int do_demangle,
 333                                    char **name,
 334                                    int *offset,
 335                                    char **filename,
 336                                    int *line,
 337                                    int *unmapped);
 338
 339 extern void print_address (struct gdbarch *, CORE_ADDR, struct ui_file *);
 340 extern const char *pc_prefix (CORE_ADDR);
 341
 342 /* From source.c */
 343
 344 /* See openp function definition for their description.  */
 345 #define OPF_TRY_CWD_FIRST     0x01
 346 #define OPF_SEARCH_IN_PATH    0x02
 347 #define OPF_RETURN_REALPATH   0x04
 348
 349 extern int openp (const char *, int, const char *, int, char **);
 350
 351 extern int source_full_path_of (const char *, char **);
 352
 353 extern void mod_path (const char *, char **);
 354
 355 extern void add_path (const char *, char **, int);
 356
 357 extern void directory_switch (const char *, int);
 358
 359 extern char *source_path;
 360
 361 extern void init_source_path (void);
 362
 363 /* From exec.c */
 364
 365 /* * Process memory area starting at ADDR with length SIZE.  Area is
 366    readable iff READ is non-zero, writable if WRITE is non-zero,
 367    executable if EXEC is non-zero.  Area is possibly changed against
 368    its original file based copy if MODIFIED is non-zero.  DATA is
 369    passed without changes from a caller.  */
 370
 371 typedef int (*find_memory_region_ftype) (CORE_ADDR addr, unsigned long size,
 372                                          int read, int write, int exec,
 373                                          int modified, void *data);
 374
 375 /* * Possible lvalue types.  Like enum language, this should be in
 376    value.h, but needs to be here for the same reason.  */
 377
 378 enum lval_type
 379   {
 380     /* * Not an lval.  */
 381     not_lval,
 382     /* * In memory.  */
 383     lval_memory,
 384     /* * In a register.  Registers are relative to a frame.  */
 385     lval_register,
 386     /* * In a gdb internal variable.  */
 387     lval_internalvar,
 388     /* * Value encapsulates a callable defined in an extension language.  */
 389     lval_xcallable,
 390     /* * Part of a gdb internal variable (structure field).  */
 391     lval_internalvar_component,
 392     /* * Value's bits are fetched and stored using functions provided
 393        by its creator.  */
 394     lval_computed
 395   };
 396
 397 /* * Parameters of the "info proc" command.  */
 398
 399 enum info_proc_what
 400   {
 401     /* * Display the default cmdline, cwd and exe outputs.  */
 402     IP_MINIMAL,
 403
 404     /* * Display `info proc mappings'.  */
 405     IP_MAPPINGS,
 406
 407     /* * Display `info proc status'.  */
 408     IP_STATUS,
 409
 410     /* * Display `info proc stat'.  */
 411     IP_STAT,
 412
 413     /* * Display `info proc cmdline'.  */
 414     IP_CMDLINE,
 415
 416     /* * Display `info proc exe'.  */
 417     IP_EXE,
 418
 419     /* * Display `info proc cwd'.  */
 420     IP_CWD,
 421
 422     /* * Display all of the above.  */
 423     IP_ALL
 424   };
 425
 426 /* * String containing the current directory (what getwd would return).  */
 427
 428 extern char *current_directory;
 429
 430 /* * Default radixes for input and output.  Only some values supported.  */
 431 extern unsigned input_radix;
 432 extern unsigned output_radix;
 433
 434 /* * Possibilities for prettyformat parameters to routines which print
 435    things.  Like enum language, this should be in value.h, but needs
 436    to be here for the same reason.  FIXME:  If we can eliminate this
 437    as an arg to LA_VAL_PRINT, then we can probably move it back to
 438    value.h.  */
 439
 440 enum val_prettyformat
 441   {
 442     Val_no_prettyformat = 0,
 443     Val_prettyformat,
 444     /* * Use the default setting which the user has specified.  */
 445     Val_prettyformat_default
 446   };
 447
 448 /* * Optional native machine support.  Non-native (and possibly pure
 449    multi-arch) targets do not need a "nm.h" file.  This will be a
 450    symlink to one of the nm-*.h files, built by the `configure'
 451    script.  */
 452
 453 #ifdef GDB_NM_FILE
 454 #include "nm.h"
 455 #endif
 456
 457 /* Assume that fopen accepts the letter "b" in the mode string.
 458    It is demanded by ISO C9X, and should be supported on all
 459    platforms that claim to have a standard-conforming C library.  On
 460    true POSIX systems it will be ignored and have no effect.  There
 461    may still be systems without a standard-conforming C library where
 462    an ISO C9X compiler (GCC) is available.  Known examples are SunOS
 463    4.x and 4.3BSD.  This assumption means these systems are no longer
 464    supported.  */
 465 #ifndef FOPEN_RB
 466 # include "fopen-bin.h"
 467 #endif
 468
 469 /* Defaults for system-wide constants (if not defined by xm.h, we fake it).
 470    FIXME: Assumes 2's complement arithmetic.  */
 471
 472 #if !defined (UINT_MAX)
 473 #define UINT_MAX ((unsigned int)(~0))       /* 0xFFFFFFFF for 32-bits */
 474 #endif
 475
 476 #if !defined (INT_MAX)
 477 #define INT_MAX ((int)(UINT_MAX >> 1))      /* 0x7FFFFFFF for 32-bits */
 478 #endif
 479
 480 #if !defined (INT_MIN)
 481 #define INT_MIN ((int)((int) ~0 ^ INT_MAX)) /* 0x80000000 for 32-bits */
 482 #endif
 483
 484 #if !defined (ULONG_MAX)
 485 #define ULONG_MAX ((unsigned long)(~0L))    /* 0xFFFFFFFF for 32-bits */
 486 #endif
 487
 488 #if !defined (LONG_MAX)
 489 #define LONG_MAX ((long)(ULONG_MAX >> 1))   /* 0x7FFFFFFF for 32-bits */
 490 #endif
 491
 492 #if !defined (ULONGEST_MAX)
 493 #define ULONGEST_MAX (~(ULONGEST)0)        /* 0xFFFFFFFFFFFFFFFF for 64-bits */
 494 #endif
 495
 496 #if !defined (LONGEST_MAX)                 /* 0x7FFFFFFFFFFFFFFF for 64-bits */
 497 #define LONGEST_MAX ((LONGEST)(ULONGEST_MAX >> 1))
 498 #endif
 499
 500 /* * Convert a LONGEST to an int.  This is used in contexts (e.g. number of
 501    arguments to a function, number in a value history, register number, etc.)
 502    where the value must not be larger than can fit in an int.  */
 503
 504 extern int longest_to_int (LONGEST);
 505
 506 /* * List of known OS ABIs.  If you change this, make sure to update the
 507    table in osabi.c.  */
 508 enum gdb_osabi
 509 {
 510   GDB_OSABI_UNINITIALIZED = -1, /* For struct gdbarch_info.  */
 511
 512   GDB_OSABI_UNKNOWN = 0,        /* keep this zero */
 513
 514   GDB_OSABI_SVR4,
 515   GDB_OSABI_HURD,
 516   GDB_OSABI_SOLARIS,
 517   GDB_OSABI_LINUX,
 518   GDB_OSABI_FREEBSD,
 519   GDB_OSABI_NETBSD,
 520   GDB_OSABI_OPENBSD,
 521   GDB_OSABI_WINCE,
 522   GDB_OSABI_GO32,
 523   GDB_OSABI_QNXNTO,
 524   GDB_OSABI_CYGWIN,
 525   GDB_OSABI_AIX,
 526   GDB_OSABI_DICOS,
 527   GDB_OSABI_DARWIN,
 528   GDB_OSABI_SYMBIAN,
 529   GDB_OSABI_OPENVMS,
 530   GDB_OSABI_LYNXOS178,
 531   GDB_OSABI_NEWLIB,
 532   GDB_OSABI_SDE,
 533
 534   GDB_OSABI_INVALID             /* keep this last */
 535 };
 536
 537 /* Enumerate the requirements a symbol has in order to be evaluated.
 538    These are listed in order of "strength" -- a later entry subsumes
 539    earlier ones.  This fine-grained distinction is important because
 540    it allows for the evaluation of a TLS symbol during unwinding --
 541    when unwinding one has access to registers, but not the frame
 542    itself, because that is being constructed.  */
 543
 544 enum symbol_needs_kind
 545 {
 546   /* No special requirements -- just memory.  */
 547   SYMBOL_NEEDS_NONE,
 548
 549   /* The symbol needs registers.  */
 550   SYMBOL_NEEDS_REGISTERS,
 551
 552   /* The symbol needs a frame.  */
 553   SYMBOL_NEEDS_FRAME
 554 };
 555
 556 /* Dynamic target-system-dependent parameters for GDB.  */
 557 #include "gdbarch.h"
 558
 559 /* * Maximum size of a register.  Something small, but large enough for
 560    all known ISAs.  If it turns out to be too small, make it bigger.  */
 561
 562 enum { MAX_REGISTER_SIZE = 64 };
 563
 564 /* In findvar.c.  */
 565
 566 template<typename T, typename = RequireLongest<T>>
 567 T extract_integer (const gdb_byte *addr, int len, enum bfd_endian byte_order);
 568
 569 static inline LONGEST
 570 extract_signed_integer (const gdb_byte *addr, int len,
 571                         enum bfd_endian byte_order)
 572 {
 573   return extract_integer<LONGEST> (addr, len, byte_order);
 574 }
 575
 576 static inline ULONGEST
 577 extract_unsigned_integer (const gdb_byte *addr, int len,
 578                           enum bfd_endian byte_order)
 579 {
 580   return extract_integer<ULONGEST> (addr, len, byte_order);
 581 }
 582
 583 extern int extract_long_unsigned_integer (const gdb_byte *, int,
 584                                           enum bfd_endian, LONGEST *);
 585
 586 extern CORE_ADDR extract_typed_address (const gdb_byte *buf,
 587                                         struct type *type);
 588
 589 /* All 'store' functions accept a host-format integer and store a
 590    target-format integer at ADDR which is LEN bytes long.  */
 591
 592 template<typename T, typename = RequireLongest<T>>
 593 extern void store_integer (gdb_byte *addr, int len, enum bfd_endian byte_order,
 594                            T val);
 595
 596 static inline void
 597 store_signed_integer (gdb_byte *addr, int len,
 598                       enum bfd_endian byte_order, LONGEST val)
 599 {
 600   return store_integer (addr, len, byte_order, val);
 601 }
 602
 603 static inline void
 604 store_unsigned_integer (gdb_byte *addr, int len,
 605                         enum bfd_endian byte_order, ULONGEST val)
 606 {
 607   return store_integer (addr, len, byte_order, val);
 608 }
 609
 610 extern void store_typed_address (gdb_byte *buf, struct type *type,
 611                                  CORE_ADDR addr);
 612
 613 extern void copy_integer_to_size (gdb_byte *dest, int dest_size,
 614                                   const gdb_byte *source, int source_size,
 615                                   bool is_signed, enum bfd_endian byte_order);
 616
 617 /* From valops.c */
 618
 619 extern int watchdog;
 620
 621 /* From dwarf2read.c */
 622
 623 ULONGEST read_unsigned_leb128 (bfd *, const gdb_byte *, unsigned int *);
 624
 625 /* Hooks for alternate command interfaces.  */
 626
 627 /* * The name of the interpreter if specified on the command line.  */
 628 extern char *interpreter_p;
 629
 630 struct target_waitstatus;
 631 struct cmd_list_element;
 632
 633 extern void (*deprecated_pre_add_symbol_hook) (const char *);
 634 extern void (*deprecated_post_add_symbol_hook) (void);
 635 extern void (*selected_frame_level_changed_hook) (int);
 636 extern int (*deprecated_ui_loop_hook) (int signo);
 637 extern void (*deprecated_show_load_progress) (const char *section,
 638                                               unsigned long section_sent,
 639                                               unsigned long section_size,
 640                                               unsigned long total_sent,
 641                                               unsigned long total_size);
 642 extern void (*deprecated_print_frame_info_listing_hook) (struct symtab * s,
 643                                                          int line,
 644                                                          int stopline,
 645                                                          int noerror);
 646 extern int (*deprecated_query_hook) (const char *, va_list)
 647      ATTRIBUTE_FPTR_PRINTF(1,0);
 648 extern void (*deprecated_warning_hook) (const char *, va_list)
 649      ATTRIBUTE_FPTR_PRINTF(1,0);
 650 extern void (*deprecated_interactive_hook) (void);
 651 extern void (*deprecated_readline_begin_hook) (const char *, ...)
 652      ATTRIBUTE_FPTR_PRINTF_1;
 653 extern char *(*deprecated_readline_hook) (const char *);
 654 extern void (*deprecated_readline_end_hook) (void);
 655 extern void (*deprecated_context_hook) (int);
 656 extern ptid_t (*deprecated_target_wait_hook) (ptid_t ptid,
 657                                               struct target_waitstatus *status,
 658                                               int options);
 659
 660 extern void (*deprecated_attach_hook) (void);
 661 extern void (*deprecated_detach_hook) (void);
 662 extern void (*deprecated_call_command_hook) (struct cmd_list_element * c,
 663                                              const char *cmd, int from_tty);
 664
 665 extern int (*deprecated_ui_load_progress_hook) (const char *section,
 666                                                 unsigned long num);
 667
 668 /* If this definition isn't overridden by the header files, assume
 669    that isatty and fileno exist on this system.  */
 670 #ifndef ISATTY
 671 #define ISATTY(FP)      (isatty (fileno (FP)))
 672 #endif
 673
 674 /* * A width that can achieve a better legibility for GDB MI mode.  */
 675 #define GDB_MI_MSG_WIDTH  80
 676
 677 /* From progspace.c */
 678
 679 extern void initialize_progspace (void);
 680 extern void initialize_inferiors (void);
 681
 682 /* From elfread.c */
 683
 684 extern const struct sym_fns elf_sym_fns_lazy_psyms;
 685 extern const struct sym_fns elf_sym_fns_gdb_index;
 686 extern const struct sym_fns elf_sym_fns_debug_names;
 687
 688 /* * Special block numbers */
 689
 690 enum block_enum
 691 {
 692   GLOBAL_BLOCK = 0,
 693   STATIC_BLOCK = 1,
 694   FIRST_LOCAL_BLOCK = 2
 695 };
 696
 697 /* User selection used in observer.h and multiple print functions.  */
 698
 699 enum user_selected_what_flag
 700   {
 701     /* Inferior selected.  */
 702     USER_SELECTED_INFERIOR = 1 << 1,
 703
 704     /* Thread selected.  */
 705     USER_SELECTED_THREAD = 1 << 2,
 706
 707     /* Frame selected.  */
 708     USER_SELECTED_FRAME = 1 << 3
 709   };
 710 DEF_ENUM_FLAGS_TYPE (enum user_selected_what_flag, user_selected_what);
 711
 712 #include "utils.h"
 713
 714 #endif /* #ifndef DEFS_H */