gdb/defs.h

   1 /* *INDENT-OFF* */ /* ATTR_FORMAT confuses indent, avoid running it for now */
   2 /* Basic, host-specific, and target-specific definitions for GDB.
   3    Copyright (C) 1986, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996,
   4    1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008
   5    Free Software Foundation, 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 #include "config.h"             /* Generated by configure.  */
  26
  27 #include <sys/types.h>
  28 #include <stdio.h>
  29 #include <errno.h>              /* System call error return status.  */
  30 #include <limits.h>
  31 #include <stdint.h>
  32
  33 #ifdef HAVE_STDDEF_H
  34 #include <stddef.h>
  35 #endif
  36
  37 #ifdef HAVE_UNISTD_H
  38 #include <unistd.h>
  39 #endif
  40
  41 #include <fcntl.h>
  42
  43 /* First include ansidecl.h so we can use the various macro definitions
  44    here and in all subsequent file inclusions.  */
  45
  46 #include "ansidecl.h"
  47
  48 #include "gdb_locale.h"
  49
  50 /* For ``enum target_signal''.  */
  51 #include "gdb/signals.h"
  52
  53 /* Just in case they're not defined in stdio.h.  */
  54
  55 #ifndef SEEK_SET
  56 #define SEEK_SET 0
  57 #endif
  58 #ifndef SEEK_CUR
  59 #define SEEK_CUR 1
  60 #endif
  61
  62 /* The O_BINARY flag is defined in fcntl.h on some non-Posix platforms.
  63    It is used as an access modifier in calls to open(), where it acts
  64    similarly to the "b" character in fopen()'s MODE argument. On Posix
  65    platforms it should be a no-op, so it is defined as 0 here. This
  66    ensures that the symbol may be used freely elsewhere in gdb. */
  67
  68 #ifndef O_BINARY
  69 #define O_BINARY 0
  70 #endif
  71
  72 #include <stdarg.h>             /* For va_list.  */
  73
  74 #include "libiberty.h"
  75
  76 /* Rather than duplicate all the logic in BFD for figuring out what
  77    types to use (which can be pretty complicated), symply define them
  78    in terms of the corresponding type from BFD.  */
  79
  80 #include "bfd.h"
  81
  82 /* A byte from the program being debugged.  */
  83 typedef bfd_byte gdb_byte;
  84
  85 /* An address in the program being debugged.  Host byte order.  */
  86 typedef bfd_vma CORE_ADDR;
  87
  88 /* The largest CORE_ADDR value.  */
  89 #define CORE_ADDR_MAX (~ (CORE_ADDR) 0)
  90
  91 /* This is to make sure that LONGEST is at least as big as CORE_ADDR.  */
  92
  93 #ifndef LONGEST
  94
  95 #ifdef BFD64
  96
  97 #define LONGEST BFD_HOST_64_BIT
  98 #define ULONGEST BFD_HOST_U_64_BIT
  99
 100 #else /* No BFD64 */
 101
 102 #ifdef CC_HAS_LONG_LONG
 103 #define LONGEST long long
 104 #define ULONGEST unsigned long long
 105 #else
 106 #ifdef BFD_HOST_64_BIT
 107 /* BFD_HOST_64_BIT is defined for some hosts that don't have long long
 108    (e.g. i386-windows) so try it.  */
 109 #define LONGEST BFD_HOST_64_BIT
 110 #define ULONGEST BFD_HOST_U_64_BIT
 111 #else
 112 #define LONGEST long
 113 #define ULONGEST unsigned long
 114 #endif
 115 #endif
 116
 117 #endif /* No BFD64 */
 118
 119 #endif /* ! LONGEST */
 120
 121 #ifndef min
 122 #define min(a, b) ((a) < (b) ? (a) : (b))
 123 #endif
 124 #ifndef max
 125 #define max(a, b) ((a) > (b) ? (a) : (b))
 126 #endif
 127
 128 /* Check if a character is one of the commonly used C++ marker characters.  */
 129 extern int is_cplus_marker (int);
 130
 131 /* enable xdb commands if set */
 132 extern int xdb_commands;
 133
 134 /* enable dbx commands if set */
 135 extern int dbx_commands;
 136
 137 /* System root path, used to find libraries etc.  */
 138 extern char *gdb_sysroot;
 139
 140 /* Search path for separate debug files.  */
 141 extern char *debug_file_directory;
 142
 143 extern int quit_flag;
 144 extern int immediate_quit;
 145 extern int sevenbit_strings;
 146
 147 extern void quit (void);
 148
 149 /* FIXME: cagney/2000-03-13: It has been suggested that the peformance
 150    benefits of having a ``QUIT'' macro rather than a function are
 151    marginal.  If the overhead of a QUIT function call is proving
 152    significant then its calling frequency should probably be reduced
 153    [kingdon].  A profile analyzing the current situtation is
 154    needed. */
 155
 156 #define QUIT { \
 157   if (quit_flag) quit (); \
 158   if (deprecated_interactive_hook) deprecated_interactive_hook (); \
 159 }
 160
 161 /* Languages represented in the symbol table and elsewhere.
 162    This should probably be in language.h, but since enum's can't
 163    be forward declared to satisfy opaque references before their
 164    actual definition, needs to be here. */
 165
 166 enum language
 167   {
 168     language_unknown,           /* Language not known */
 169     language_auto,              /* Placeholder for automatic setting */
 170     language_c,                 /* C */
 171     language_cplus,             /* C++ */
 172     language_objc,              /* Objective-C */
 173     language_java,              /* Java */
 174     language_fortran,           /* Fortran */
 175     language_m2,                /* Modula-2 */
 176     language_asm,               /* Assembly language */
 177     language_pascal,            /* Pascal */
 178     language_ada,               /* Ada */
 179     language_scm,               /* Guile Scheme */
 180     language_minimal,           /* All other languages, minimal support only */
 181     nr_languages
 182   };
 183
 184 enum precision_type
 185   {
 186     single_precision,
 187     double_precision,
 188     unspecified_precision
 189   };
 190
 191 /* A generic, not quite boolean, enumeration.  */
 192 enum auto_boolean
 193 {
 194   AUTO_BOOLEAN_TRUE,
 195   AUTO_BOOLEAN_FALSE,
 196   AUTO_BOOLEAN_AUTO
 197 };
 198
 199 /* Potential ways that a function can return a value of a given type.  */
 200 enum return_value_convention
 201 {
 202   /* Where the return value has been squeezed into one or more
 203      registers.  */
 204   RETURN_VALUE_REGISTER_CONVENTION,
 205   /* Commonly known as the "struct return convention".  The caller
 206      passes an additional hidden first parameter to the caller.  That
 207      parameter contains the address at which the value being returned
 208      should be stored.  While typically, and historically, used for
 209      large structs, this is convention is applied to values of many
 210      different types.  */
 211   RETURN_VALUE_STRUCT_CONVENTION,
 212   /* Like the "struct return convention" above, but where the ABI
 213      guarantees that the called function stores the address at which
 214      the value being returned is stored in a well-defined location,
 215      such as a register or memory slot in the stack frame.  Don't use
 216      this if the ABI doesn't explicitly guarantees this.  */
 217   RETURN_VALUE_ABI_RETURNS_ADDRESS,
 218   /* Like the "struct return convention" above, but where the ABI
 219      guarantees that the address at which the value being returned is
 220      stored will be available in a well-defined location, such as a
 221      register or memory slot in the stack frame.  Don't use this if
 222      the ABI doesn't explicitly guarantees this.  */
 223   RETURN_VALUE_ABI_PRESERVES_ADDRESS,
 224 };
 225
 226 /* the cleanup list records things that have to be undone
 227    if an error happens (descriptors to be closed, memory to be freed, etc.)
 228    Each link in the chain records a function to call and an
 229    argument to give it.
 230
 231    Use make_cleanup to add an element to the cleanup chain.
 232    Use do_cleanups to do all cleanup actions back to a given
 233    point in the chain.  Use discard_cleanups to remove cleanups
 234    from the chain back to a given point, not doing them.
 235
 236    If the argument is pointer to allocated memory, then you need to
 237    to additionally set the 'free_arg' member to a function that will
 238    free that memory.  This function will be called both when the cleanup
 239    is executed and when it's discarded.  */
 240
 241 struct cleanup
 242   {
 243     struct cleanup *next;
 244     void (*function) (void *);
 245     void (*free_arg) (void *);
 246     void *arg;
 247   };
 248
 249
 250 /* The ability to declare that a function never returns is useful, but
 251    not really required to compile GDB successfully, so the NORETURN and
 252    ATTR_NORETURN macros normally expand into nothing.  */
 253
 254 /* If compiling with older versions of GCC, a function may be declared
 255    "volatile" to indicate that it does not return.  */
 256
 257 #ifndef NORETURN
 258 #if defined(__GNUC__) \
 259      && (__GNUC__ == 1 || (__GNUC__ == 2 && __GNUC_MINOR__ < 7))
 260 #define NORETURN volatile
 261 #else
 262 #define NORETURN                /* nothing */
 263 #endif
 264 #endif
 265
 266 /* GCC 2.5 and later versions define a function attribute "noreturn",
 267    which is the preferred way to declare that a function never returns.
 268    However GCC 2.7 appears to be the first version in which this fully
 269    works everywhere we use it. */
 270
 271 #ifndef ATTR_NORETURN
 272 #if defined(__GNUC__) && (__GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 7))
 273 #define ATTR_NORETURN __attribute__ ((noreturn))
 274 #else
 275 #define ATTR_NORETURN           /* nothing */
 276 #endif
 277 #endif
 278
 279 #ifndef ATTR_FORMAT
 280 #if defined(__GNUC__) && (__GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 4))
 281 #define ATTR_FORMAT(type, x, y) __attribute__ ((format(type, x, y)))
 282 #else
 283 #define ATTR_FORMAT(type, x, y) /* nothing */
 284 #endif
 285 #endif
 286
 287 /* Be conservative and use enum bitfields only with GCC.
 288    This is copied from gcc 3.3.1, system.h.  */
 289
 290 #if defined(__GNUC__) && (__GNUC__ >= 2)
 291 #define ENUM_BITFIELD(TYPE) enum TYPE
 292 #else
 293 #define ENUM_BITFIELD(TYPE) unsigned int
 294 #endif
 295
 296 /* Needed for various prototypes */
 297
 298 struct symtab;
 299 struct breakpoint;
 300 struct frame_info;
 301
 302 /* From utils.c */
 303
 304 extern void initialize_utils (void);
 305
 306 extern void notice_quit (void);
 307
 308 extern int strcmp_iw (const char *, const char *);
 309
 310 extern int strcmp_iw_ordered (const char *, const char *);
 311
 312 extern int streq (const char *, const char *);
 313
 314 extern int subset_compare (char *, char *);
 315
 316 extern char *safe_strerror (int);
 317
 318 #define ALL_CLEANUPS    ((struct cleanup *)0)
 319
 320 extern void do_cleanups (struct cleanup *);
 321 extern void do_final_cleanups (struct cleanup *);
 322
 323 extern void discard_cleanups (struct cleanup *);
 324 extern void discard_final_cleanups (struct cleanup *);
 325 extern void discard_my_cleanups (struct cleanup **, struct cleanup *);
 326
 327 /* NOTE: cagney/2000-03-04: This typedef is strictly for the
 328    make_cleanup function declarations below. Do not use this typedef
 329    as a cast when passing functions into the make_cleanup() code.
 330    Instead either use a bounce function or add a wrapper function.
 331    Calling a f(char*) function with f(void*) is non-portable. */
 332 typedef void (make_cleanup_ftype) (void *);
 333
 334 extern struct cleanup *make_cleanup (make_cleanup_ftype *, void *);
 335
 336 extern struct cleanup *make_cleanup_dtor (make_cleanup_ftype *, void *,
 337                                           void (*dtor) (void *));
 338
 339 extern struct cleanup *make_cleanup_freeargv (char **);
 340
 341 struct ui_file;
 342 extern struct cleanup *make_cleanup_ui_file_delete (struct ui_file *);
 343
 344 struct section_addr_info;
 345 extern struct cleanup *(make_cleanup_free_section_addr_info
 346                         (struct section_addr_info *));
 347
 348 extern struct cleanup *make_cleanup_close (int fd);
 349
 350 extern struct cleanup *make_cleanup_bfd_close (bfd *abfd);
 351
 352 extern struct cleanup *make_cleanup_restore_integer (int *variable);
 353
 354 extern struct cleanup *make_final_cleanup (make_cleanup_ftype *, void *);
 355
 356 extern struct cleanup *make_my_cleanup (struct cleanup **,
 357                                         make_cleanup_ftype *, void *);
 358
 359 extern struct cleanup *make_my_cleanup2 (struct cleanup **,
 360                                          make_cleanup_ftype *, void *,
 361                                          void (*free_arg) (void *));
 362
 363 extern struct cleanup *save_cleanups (void);
 364 extern struct cleanup *save_final_cleanups (void);
 365 extern struct cleanup *save_my_cleanups (struct cleanup **);
 366
 367 extern void restore_cleanups (struct cleanup *);
 368 extern void restore_final_cleanups (struct cleanup *);
 369 extern void restore_my_cleanups (struct cleanup **, struct cleanup *);
 370
 371 extern void free_current_contents (void *);
 372
 373 extern void null_cleanup (void *);
 374
 375 extern int myread (int, char *, int);
 376
 377 extern int query (const char *, ...) ATTR_FORMAT (printf, 1, 2);
 378 extern int nquery (const char *, ...) ATTR_FORMAT (printf, 1, 2);
 379 extern int yquery (const char *, ...) ATTR_FORMAT (printf, 1, 2);
 380
 381 extern void init_page_info (void);
 382
 383 extern char *gdb_realpath (const char *);
 384 extern char *xfullpath (const char *);
 385
 386 extern unsigned long gnu_debuglink_crc32 (unsigned long crc,
 387                                           unsigned char *buf, size_t len);
 388
 389 ULONGEST strtoulst (const char *num, const char **trailer, int base);
 390
 391 char *ldirname (const char *filename);
 392
 393 /* From demangle.c */
 394
 395 extern void set_demangling_style (char *);
 396
 397 \f
 398 /* Annotation stuff.  */
 399
 400 extern int annotation_level;    /* in stack.c */
 401 \f
 402 extern void begin_line (void);
 403
 404 extern void wrap_here (char *);
 405
 406 extern void reinitialize_more_filter (void);
 407
 408 /* Normal results */
 409 extern struct ui_file *gdb_stdout;
 410 /* Input stream */
 411 extern struct ui_file *gdb_stdin;
 412 /* Serious error notifications */
 413 extern struct ui_file *gdb_stderr;
 414 /* Log/debug/trace messages that should bypass normal stdout/stderr
 415    filtering.  For moment, always call this stream using
 416    *_unfiltered. In the very near future that restriction shall be
 417    removed - either call shall be unfiltered. (cagney 1999-06-13). */
 418 extern struct ui_file *gdb_stdlog;
 419 /* Target output that should bypass normal stdout/stderr filtering.
 420    For moment, always call this stream using *_unfiltered. In the
 421    very near future that restriction shall be removed - either call
 422    shall be unfiltered. (cagney 1999-07-02). */
 423 extern struct ui_file *gdb_stdtarg;
 424 extern struct ui_file *gdb_stdtargerr;
 425 extern struct ui_file *gdb_stdtargin;
 426
 427 #include "ui-file.h"
 428
 429 /* More generic printf like operations.  Filtered versions may return
 430    non-locally on error.  */
 431
 432 extern void fputs_filtered (const char *, struct ui_file *);
 433
 434 extern void fputs_unfiltered (const char *, struct ui_file *);
 435
 436 extern int fputc_filtered (int c, struct ui_file *);
 437
 438 extern int fputc_unfiltered (int c, struct ui_file *);
 439
 440 extern int putchar_filtered (int c);
 441
 442 extern int putchar_unfiltered (int c);
 443
 444 extern void puts_filtered (const char *);
 445
 446 extern void puts_unfiltered (const char *);
 447
 448 extern void puts_filtered_tabular (char *string, int width, int right);
 449
 450 extern void puts_debug (char *prefix, char *string, char *suffix);
 451
 452 extern void vprintf_filtered (const char *, va_list) ATTR_FORMAT (printf, 1, 0);
 453
 454 extern void vfprintf_filtered (struct ui_file *, const char *, va_list) ATTR_FORMAT (printf, 2, 0);
 455
 456 extern void fprintf_filtered (struct ui_file *, const char *, ...) ATTR_FORMAT (printf, 2, 3);
 457
 458 extern void fprintfi_filtered (int, struct ui_file *, const char *, ...) ATTR_FORMAT (printf, 3, 4);
 459
 460 extern void printf_filtered (const char *, ...) ATTR_FORMAT (printf, 1, 2);
 461
 462 extern void printfi_filtered (int, const char *, ...) ATTR_FORMAT (printf, 2, 3);
 463
 464 extern void vprintf_unfiltered (const char *, va_list) ATTR_FORMAT (printf, 1, 0);
 465
 466 extern void vfprintf_unfiltered (struct ui_file *, const char *, va_list) ATTR_FORMAT (printf, 2, 0);
 467
 468 extern void fprintf_unfiltered (struct ui_file *, const char *, ...) ATTR_FORMAT (printf, 2, 3);
 469
 470 extern void printf_unfiltered (const char *, ...) ATTR_FORMAT (printf, 1, 2);
 471
 472 extern void print_spaces (int, struct ui_file *);
 473
 474 extern void print_spaces_filtered (int, struct ui_file *);
 475
 476 extern char *n_spaces (int);
 477
 478 extern void fputstr_filtered (const char *str, int quotr, struct ui_file * stream);
 479
 480 extern void fputstr_unfiltered (const char *str, int quotr, struct ui_file * stream);
 481
 482 extern void fputstrn_filtered (const char *str, int n, int quotr, struct ui_file * stream);
 483
 484 extern void fputstrn_unfiltered (const char *str, int n, int quotr, struct ui_file * stream);
 485
 486 /* Display the host ADDR on STREAM formatted as ``0x%x''. */
 487 extern void gdb_print_host_address (const void *addr, struct ui_file *stream);
 488
 489 extern const char *host_address_to_string (const void *addr);
 490
 491 /* Convert a CORE_ADDR into a HEX string.  paddr() is like %08lx.
 492    paddr_nz() is like %lx.  */
 493 extern int strlen_paddr (void);
 494 extern char *paddr (CORE_ADDR addr);
 495 extern char *paddr_nz (CORE_ADDR addr);
 496
 497 /* Like 0x%lx.  */
 498 extern const char *paddress (CORE_ADDR addr);
 499
 500 /* %d for LONGEST */
 501 extern char *plongest (LONGEST l);
 502 /* %u for ULONGEST */
 503 extern char *pulongest (ULONGEST l);
 504
 505 extern char *phex (ULONGEST l, int sizeof_l);
 506 extern char *phex_nz (ULONGEST l, int sizeof_l);
 507 extern char *int_string (LONGEST, int, int, int, int);
 508
 509 /* Like paddr() only print/scan raw CORE_ADDR.  The output from
 510    core_addr_to_string() can be passed direct to
 511    string_to_core_addr().  */
 512 extern const char *core_addr_to_string (const CORE_ADDR addr);
 513 extern const char *core_addr_to_string_nz (const CORE_ADDR addr);
 514 extern CORE_ADDR string_to_core_addr (const char *my_string);
 515
 516 /* Return a string that contains a number formatted as a hex
 517    string.  */
 518 extern char *hex_string (LONGEST);
 519 extern char *hex_string_custom (LONGEST, int);
 520
 521 extern void fprintf_symbol_filtered (struct ui_file *, char *,
 522                                      enum language, int);
 523
 524 extern NORETURN void perror_with_name (const char *) ATTR_NORETURN;
 525
 526 extern void print_sys_errmsg (const char *, int);
 527
 528 /* From regex.c or libc.  BSD 4.4 declares this with the argument type as
 529    "const char *" in unistd.h, so we can't declare the argument
 530    as "char *".  */
 531
 532 extern char *re_comp (const char *);
 533
 534 /* From symfile.c */
 535
 536 extern void symbol_file_command (char *, int);
 537
 538 /* Remote targets may wish to use this as their load function.  */
 539 extern void generic_load (char *name, int from_tty);
 540
 541 /* Report on STREAM the performance of memory transfer operation,
 542    such as 'load'.
 543    DATA_COUNT is the number of bytes transferred.
 544    WRITE_COUNT is the number of separate write operations, or 0,
 545    if that information is not available.
 546    START_TIME is the time at which an operation was started.
 547    END_TIME is the time at which an operation ended.  */
 548 struct timeval;
 549 extern void print_transfer_performance (struct ui_file *stream,
 550                                         unsigned long data_count,
 551                                         unsigned long write_count,
 552                                         const struct timeval *start_time,
 553                                         const struct timeval *end_time);
 554
 555 /* From top.c */
 556
 557 typedef void initialize_file_ftype (void);
 558
 559 extern char *skip_quoted (char *);
 560
 561 extern char *gdb_readline (char *);
 562
 563 extern char *gdb_readline_wrapper (char *);
 564
 565 extern char *command_line_input (char *, int, char *);
 566
 567 extern void print_prompt (void);
 568
 569 extern int input_from_terminal_p (void);
 570
 571 extern int info_verbose;
 572
 573 /* From printcmd.c */
 574
 575 extern void set_next_address (CORE_ADDR);
 576
 577 extern void print_address_symbolic (CORE_ADDR, struct ui_file *, int,
 578                                     char *);
 579
 580 extern int build_address_symbolic (CORE_ADDR addr,
 581                                    int do_demangle,
 582                                    char **name,
 583                                    int *offset,
 584                                    char **filename,
 585                                    int *line,
 586                                    int *unmapped);
 587
 588 extern void print_address (CORE_ADDR, struct ui_file *);
 589
 590 /* From source.c */
 591
 592 #define OPF_TRY_CWD_FIRST     0x01
 593 #define OPF_SEARCH_IN_PATH    0x02
 594
 595 extern int openp (const char *, int, const char *, int, int, char **);
 596
 597 extern int source_full_path_of (char *, char **);
 598
 599 extern void mod_path (char *, char **);
 600
 601 extern void add_path (char *, char **, int);
 602
 603 extern void directory_command (char *, int);
 604
 605 extern void directory_switch (char *, int);
 606
 607 extern char *source_path;
 608
 609 extern void init_source_path (void);
 610
 611 extern void init_last_source_visited (void);
 612
 613 /* From exec.c */
 614
 615 /* Take over the 'find_mapped_memory' vector from exec.c. */
 616 extern void exec_set_find_memory_regions (int (*) (int (*) (CORE_ADDR,
 617                                                             unsigned long,
 618                                                             int, int, int,
 619                                                             void *),
 620                                                    void *));
 621
 622 /* Possible lvalue types.  Like enum language, this should be in
 623    value.h, but needs to be here for the same reason. */
 624
 625 enum lval_type
 626   {
 627     /* Not an lval. */
 628     not_lval,
 629     /* In memory.  */
 630     lval_memory,
 631     /* In a register.  Registers are relative to a frame.  */
 632     lval_register,
 633     /* In a gdb internal variable.  */
 634     lval_internalvar,
 635     /* Part of a gdb internal variable (structure field).  */
 636     lval_internalvar_component
 637   };
 638
 639 /* Control types for commands */
 640
 641 enum misc_command_type
 642   {
 643     ok_command,
 644     end_command,
 645     else_command,
 646     nop_command
 647   };
 648
 649 enum command_control_type
 650   {
 651     simple_control,
 652     break_control,
 653     continue_control,
 654     while_control,
 655     if_control,
 656     commands_control,
 657     python_control,
 658     invalid_control
 659   };
 660
 661 /* Structure for saved commands lines
 662    (for breakpoints, defined commands, etc).  */
 663
 664 struct command_line
 665   {
 666     struct command_line *next;
 667     char *line;
 668     enum command_control_type control_type;
 669     int body_count;
 670     struct command_line **body_list;
 671   };
 672
 673 extern struct command_line *read_command_lines (char *, int, int);
 674
 675 extern void free_command_lines (struct command_line **);
 676
 677 /* To continue the execution commands when running gdb asynchronously.
 678    A continuation structure contains a pointer to a function to be called
 679    to finish the command, once the target has stopped. Such mechanism is
 680    used by the finish and until commands, and in the remote protocol
 681    when opening an extended-remote connection. */
 682
 683 struct continuation;
 684
 685 /* In infrun.c. */
 686 extern struct continuation *cmd_continuation;
 687 /* Used only by the step_1 function. */
 688 extern struct continuation *intermediate_continuation;
 689
 690 /* From utils.c */
 691 extern void add_continuation (void (*)(void *), void *,
 692                               void (*)(void *));
 693 extern void do_all_continuations (void);
 694 extern void discard_all_continuations (void);
 695
 696 extern void add_intermediate_continuation (void (*)(void *), void *,
 697                                            void (*)(void *));
 698 extern void do_all_intermediate_continuations (void);
 699 extern void discard_all_intermediate_continuations (void);
 700
 701 /* String containing the current directory (what getwd would return).  */
 702
 703 extern char *current_directory;
 704
 705 /* Default radixes for input and output.  Only some values supported.  */
 706 extern unsigned input_radix;
 707 extern unsigned output_radix;
 708
 709 /* Possibilities for prettyprint parameters to routines which print
 710    things.  Like enum language, this should be in value.h, but needs
 711    to be here for the same reason.  FIXME:  If we can eliminate this
 712    as an arg to LA_VAL_PRINT, then we can probably move it back to
 713    value.h. */
 714
 715 enum val_prettyprint
 716   {
 717     Val_no_prettyprint = 0,
 718     Val_prettyprint,
 719     /* Use the default setting which the user has specified.  */
 720     Val_pretty_default
 721   };
 722
 723 /* The ptid struct is a collection of the various "ids" necessary
 724    for identifying the inferior.  This consists of the process id
 725    (pid), thread id (tid), and other fields necessary for uniquely
 726    identifying the inferior process/thread being debugged.  When
 727    manipulating ptids, the constructors, accessors, and predicate
 728    declared in inferior.h should be used.  These are as follows:
 729
 730       ptid_build        - Make a new ptid from a pid, lwp, and tid.
 731       pid_to_ptid       - Make a new ptid from just a pid.
 732       ptid_get_pid      - Fetch the pid component of a ptid.
 733       ptid_get_lwp      - Fetch the lwp component of a ptid.
 734       ptid_get_tid      - Fetch the tid component of a ptid.
 735       ptid_equal        - Test to see if two ptids are equal.
 736
 737    Please do NOT access the struct ptid members directly (except, of
 738    course, in the implementation of the above ptid manipulation
 739    functions).  */
 740
 741 struct ptid
 742   {
 743     /* Process id */
 744     int pid;
 745
 746     /* Lightweight process id */
 747     long lwp;
 748
 749     /* Thread id */
 750     long tid;
 751   };
 752
 753 typedef struct ptid ptid_t;
 754
 755 \f
 756
 757 /* Optional native machine support.  Non-native (and possibly pure
 758    multi-arch) targets do not need a "nm.h" file.  This will be a
 759    symlink to one of the nm-*.h files, built by the `configure'
 760    script.  */
 761
 762 #ifdef GDB_NM_FILE
 763 #include "nm.h"
 764 #endif
 765
 766 /* Assume that fopen accepts the letter "b" in the mode string.
 767    It is demanded by ISO C9X, and should be supported on all
 768    platforms that claim to have a standard-conforming C library.  On
 769    true POSIX systems it will be ignored and have no effect.  There
 770    may still be systems without a standard-conforming C library where
 771    an ISO C9X compiler (GCC) is available.  Known examples are SunOS
 772    4.x and 4.3BSD.  This assumption means these systems are no longer
 773    supported.  */
 774 #ifndef FOPEN_RB
 775 # include "fopen-bin.h"
 776 #endif
 777
 778 /* Defaults for system-wide constants (if not defined by xm.h, we fake it).
 779    FIXME: Assumes 2's complement arithmetic */
 780
 781 #if !defined (UINT_MAX)
 782 #define UINT_MAX ((unsigned int)(~0))   /* 0xFFFFFFFF for 32-bits */
 783 #endif
 784
 785 #if !defined (INT_MAX)
 786 #define INT_MAX ((int)(UINT_MAX >> 1))  /* 0x7FFFFFFF for 32-bits */
 787 #endif
 788
 789 #if !defined (INT_MIN)
 790 #define INT_MIN ((int)((int) ~0 ^ INT_MAX))     /* 0x80000000 for 32-bits */
 791 #endif
 792
 793 #if !defined (ULONG_MAX)
 794 #define ULONG_MAX ((unsigned long)(~0L))        /* 0xFFFFFFFF for 32-bits */
 795 #endif
 796
 797 #if !defined (LONG_MAX)
 798 #define LONG_MAX ((long)(ULONG_MAX >> 1))       /* 0x7FFFFFFF for 32-bits */
 799 #endif
 800
 801 #if !defined (ULONGEST_MAX)
 802 #define ULONGEST_MAX (~(ULONGEST)0)        /* 0xFFFFFFFFFFFFFFFF for 64-bits */
 803 #endif
 804
 805 #if !defined (LONGEST_MAX)                 /* 0x7FFFFFFFFFFFFFFF for 64-bits */
 806 #define LONGEST_MAX ((LONGEST)(ULONGEST_MAX >> 1))
 807 #endif
 808
 809 /* Convert a LONGEST to an int.  This is used in contexts (e.g. number of
 810    arguments to a function, number in a value history, register number, etc.)
 811    where the value must not be larger than can fit in an int.  */
 812
 813 extern int longest_to_int (LONGEST);
 814
 815 /* Assorted functions we can declare, now that const and volatile are
 816    defined.  */
 817
 818 extern char *savestring (const char *, size_t);
 819
 820 /* xmalloc(), xrealloc() and xcalloc() have already been declared in
 821    "libiberty.h". */
 822 extern void xfree (void *);
 823
 824 /* Like xmalloc, but zero the memory.  */
 825 extern void *xzalloc (size_t);
 826
 827 /* Utility macros to allocate typed memory.  Avoids errors like:
 828    struct foo *foo = xmalloc (sizeof struct bar); and memset (foo,
 829    sizeof (struct foo), 0).  */
 830 #define XZALLOC(TYPE) ((TYPE*) xzalloc (sizeof (TYPE)))
 831 #define XMALLOC(TYPE) ((TYPE*) xmalloc (sizeof (TYPE)))
 832 #define XCALLOC(NMEMB, TYPE) ((TYPE*) xcalloc ((NMEMB), sizeof (TYPE)))
 833
 834 /* Like asprintf/vasprintf but get an internal_error if the call
 835    fails. */
 836 extern void xasprintf (char **ret, const char *format, ...) ATTR_FORMAT (printf, 2, 3);
 837 extern void xvasprintf (char **ret, const char *format, va_list ap)
 838      ATTR_FORMAT (printf, 2, 0);
 839
 840 /* Like asprintf and vasprintf, but return the string, throw an error
 841    if no memory.  */
 842 extern char *xstrprintf (const char *format, ...) ATTR_FORMAT (printf, 1, 2);
 843 extern char *xstrvprintf (const char *format, va_list ap)
 844      ATTR_FORMAT (printf, 1, 0);
 845
 846 /* Like snprintf, but throw an error if the output buffer is too small.  */
 847 extern int xsnprintf (char *str, size_t size, const char *format, ...)
 848      ATTR_FORMAT (printf, 3, 4);
 849
 850 extern int parse_escape (char **);
 851
 852 /* Message to be printed before the error message, when an error occurs.  */
 853
 854 extern char *error_pre_print;
 855
 856 /* Message to be printed before the error message, when an error occurs.  */
 857
 858 extern char *quit_pre_print;
 859
 860 /* Message to be printed before the warning message, when a warning occurs.  */
 861
 862 extern char *warning_pre_print;
 863
 864 extern NORETURN void verror (const char *fmt, va_list ap)
 865      ATTR_NORETURN ATTR_FORMAT (printf, 1, 0);
 866
 867 extern NORETURN void error (const char *fmt, ...) ATTR_NORETURN ATTR_FORMAT (printf, 1, 2);
 868
 869 extern NORETURN void error_stream (struct ui_file *) ATTR_NORETURN;
 870
 871 extern NORETURN void vfatal (const char *fmt, va_list ap)
 872      ATTR_NORETURN ATTR_FORMAT (printf, 1, 0);
 873
 874 extern NORETURN void fatal (const char *fmt, ...) ATTR_NORETURN ATTR_FORMAT (printf, 1, 2);
 875
 876 extern NORETURN void internal_verror (const char *file, int line,
 877                                       const char *, va_list ap)
 878      ATTR_NORETURN ATTR_FORMAT (printf, 3, 0);
 879
 880 extern NORETURN void internal_error (const char *file, int line,
 881                                      const char *, ...) ATTR_NORETURN ATTR_FORMAT (printf, 3, 4);
 882
 883 extern void internal_vwarning (const char *file, int line,
 884                                const char *, va_list ap)
 885      ATTR_FORMAT (printf, 3, 0);
 886
 887 extern void internal_warning (const char *file, int line,
 888                               const char *, ...) ATTR_FORMAT (printf, 3, 4);
 889
 890 extern NORETURN void nomem (long) ATTR_NORETURN;
 891
 892 extern void warning (const char *, ...) ATTR_FORMAT (printf, 1, 2);
 893
 894 extern void vwarning (const char *, va_list args) ATTR_FORMAT (printf, 1, 0);
 895
 896 /* List of known OS ABIs.  If you change this, make sure to update the
 897    table in osabi.c.  */
 898 enum gdb_osabi
 899 {
 900   GDB_OSABI_UNINITIALIZED = -1, /* For struct gdbarch_info.  */
 901
 902   GDB_OSABI_UNKNOWN = 0,        /* keep this zero */
 903
 904   GDB_OSABI_SVR4,
 905   GDB_OSABI_HURD,
 906   GDB_OSABI_SOLARIS,
 907   GDB_OSABI_OSF1,
 908   GDB_OSABI_LINUX,
 909   GDB_OSABI_FREEBSD_AOUT,
 910   GDB_OSABI_FREEBSD_ELF,
 911   GDB_OSABI_NETBSD_AOUT,
 912   GDB_OSABI_NETBSD_ELF,
 913   GDB_OSABI_OPENBSD_ELF,
 914   GDB_OSABI_WINCE,
 915   GDB_OSABI_GO32,
 916   GDB_OSABI_IRIX,
 917   GDB_OSABI_INTERIX,
 918   GDB_OSABI_HPUX_ELF,
 919   GDB_OSABI_HPUX_SOM,
 920
 921   GDB_OSABI_QNXNTO,
 922
 923   GDB_OSABI_CYGWIN,
 924   GDB_OSABI_AIX,
 925   GDB_OSABI_DICOS,
 926
 927   GDB_OSABI_INVALID             /* keep this last */
 928 };
 929
 930 /* Global functions from other, non-gdb GNU thingies.
 931    Libiberty thingies are no longer declared here.  We include libiberty.h
 932    above, instead.  */
 933
 934 /* From other system libraries */
 935
 936 #ifdef HAVE_STDDEF_H
 937 #include <stddef.h>
 938 #endif
 939
 940 #ifdef HAVE_STDLIB_H
 941 #include <stdlib.h>
 942 #endif
 943 #ifndef min
 944 #define min(a, b) ((a) < (b) ? (a) : (b))
 945 #endif
 946 #ifndef max
 947 #define max(a, b) ((a) > (b) ? (a) : (b))
 948 #endif
 949
 950
 951 #ifndef atof
 952 extern double atof (const char *);      /* X3.159-1989  4.10.1.1 */
 953 #endif
 954
 955 /* Various possibilities for alloca.  */
 956 #ifndef alloca
 957 #ifdef __GNUC__
 958 #define alloca __builtin_alloca
 959 #else /* Not GNU C */
 960 #ifdef HAVE_ALLOCA_H
 961 #include <alloca.h>
 962 #else
 963 #ifdef _AIX
 964 #pragma alloca
 965 #else
 966
 967 /* We need to be careful not to declare this in a way which conflicts with
 968    bison.  Bison never declares it as char *, but under various circumstances
 969    (like __hpux) we need to use void *.  */
 970 extern void *alloca ();
 971 #endif /* Not _AIX */
 972 #endif /* Not HAVE_ALLOCA_H */
 973 #endif /* Not GNU C */
 974 #endif /* alloca not defined */
 975
 976 /* Dynamic target-system-dependent parameters for GDB. */
 977 #include "gdbarch.h"
 978
 979 /* Maximum size of a register.  Something small, but large enough for
 980    all known ISAs.  If it turns out to be too small, make it bigger.  */
 981
 982 enum { MAX_REGISTER_SIZE = 16 };
 983
 984 /* Static target-system-dependent parameters for GDB. */
 985
 986 /* Number of bits in a char or unsigned char for the target machine.
 987    Just like CHAR_BIT in <limits.h> but describes the target machine.  */
 988 #if !defined (TARGET_CHAR_BIT)
 989 #define TARGET_CHAR_BIT 8
 990 #endif
 991
 992 /* If we picked up a copy of CHAR_BIT from a configuration file
 993    (which may get it by including <limits.h>) then use it to set
 994    the number of bits in a host char.  If not, use the same size
 995    as the target. */
 996
 997 #if defined (CHAR_BIT)
 998 #define HOST_CHAR_BIT CHAR_BIT
 999 #else
1000 #define HOST_CHAR_BIT TARGET_CHAR_BIT
1001 #endif
1002
1003 /* In findvar.c.  */
1004
1005 extern LONGEST extract_signed_integer (const gdb_byte *, int);
1006
1007 extern ULONGEST extract_unsigned_integer (const gdb_byte *, int);
1008
1009 extern int extract_long_unsigned_integer (const gdb_byte *, int, LONGEST *);
1010
1011 extern CORE_ADDR extract_typed_address (const gdb_byte *buf,
1012                                         struct type *type);
1013
1014 extern void store_signed_integer (gdb_byte *, int, LONGEST);
1015
1016 extern void store_unsigned_integer (gdb_byte *, int, ULONGEST);
1017
1018 extern void store_typed_address (gdb_byte *buf, struct type *type,
1019                                  CORE_ADDR addr);
1020
1021 \f
1022 /* From valops.c */
1023
1024 extern int watchdog;
1025
1026 /* Hooks for alternate command interfaces.  */
1027
1028 /* The name of the interpreter if specified on the command line. */
1029 extern char *interpreter_p;
1030
1031 /* If a given interpreter matches INTERPRETER_P then it should update
1032    deprecated_command_loop_hook and deprecated_init_ui_hook with the
1033    per-interpreter implementation.  */
1034 /* FIXME: deprecated_command_loop_hook and deprecated_init_ui_hook
1035    should be moved here. */
1036
1037 struct target_waitstatus;
1038 struct cmd_list_element;
1039
1040 extern void (*deprecated_pre_add_symbol_hook) (const char *);
1041 extern void (*deprecated_post_add_symbol_hook) (void);
1042 extern void (*selected_frame_level_changed_hook) (int);
1043 extern int (*deprecated_ui_loop_hook) (int signo);
1044 extern void (*deprecated_init_ui_hook) (char *argv0);
1045 extern void (*deprecated_command_loop_hook) (void);
1046 extern void (*deprecated_show_load_progress) (const char *section,
1047                                               unsigned long section_sent,
1048                                               unsigned long section_size,
1049                                               unsigned long total_sent,
1050                                               unsigned long total_size);
1051 extern void (*deprecated_print_frame_info_listing_hook) (struct symtab * s,
1052                                                          int line, int stopline,
1053                                                          int noerror);
1054 extern int (*deprecated_query_hook) (const char *, va_list)
1055      ATTRIBUTE_FPTR_PRINTF(1,0);
1056 extern void (*deprecated_warning_hook) (const char *, va_list)
1057      ATTRIBUTE_FPTR_PRINTF(1,0);
1058 extern void (*deprecated_flush_hook) (struct ui_file * stream);
1059 extern void (*deprecated_interactive_hook) (void);
1060 extern void (*deprecated_readline_begin_hook) (char *, ...)
1061      ATTRIBUTE_FPTR_PRINTF_1;
1062 extern char *(*deprecated_readline_hook) (char *);
1063 extern void (*deprecated_readline_end_hook) (void);
1064 extern void (*deprecated_register_changed_hook) (int regno);
1065 extern void (*deprecated_memory_changed_hook) (CORE_ADDR addr, int len);
1066 extern void (*deprecated_context_hook) (int);
1067 extern ptid_t (*deprecated_target_wait_hook) (ptid_t ptid,
1068                                          struct target_waitstatus * status);
1069
1070 extern void (*deprecated_attach_hook) (void);
1071 extern void (*deprecated_detach_hook) (void);
1072 extern void (*deprecated_call_command_hook) (struct cmd_list_element * c,
1073                                              char *cmd, int from_tty);
1074
1075 extern void (*deprecated_set_hook) (struct cmd_list_element * c);
1076
1077 extern void (*deprecated_error_hook) (void);
1078
1079 extern void (*deprecated_error_begin_hook) (void);
1080
1081 extern int (*deprecated_ui_load_progress_hook) (const char *section,
1082                                                 unsigned long num);
1083
1084
1085 /* Inhibit window interface if non-zero. */
1086
1087 extern int use_windows;
1088
1089 /* Symbolic definitions of filename-related things.  */
1090 /* FIXME, this doesn't work very well if host and executable
1091    filesystems conventions are different.  */
1092
1093 #ifdef __MSDOS__
1094 # define CANT_FORK
1095 # define GLOBAL_CURDIR
1096 # define DIRNAME_SEPARATOR ';'
1097 #endif
1098
1099 #if !defined (__CYGWIN__) && defined (_WIN32)
1100 # define DIRNAME_SEPARATOR ';'
1101 #endif
1102
1103 #ifndef DIRNAME_SEPARATOR
1104 #define DIRNAME_SEPARATOR ':'
1105 #endif
1106
1107 #ifndef SLASH_STRING
1108 #define SLASH_STRING "/"
1109 #endif
1110
1111 /* Provide default definitions of PIDGET, TIDGET, and MERGEPID.
1112    The name ``TIDGET'' is a historical accident.  Many uses of TIDGET
1113    in the code actually refer to a lightweight process id, i.e,
1114    something that can be considered a process id in its own right for
1115    certain purposes.  */
1116
1117 #ifndef PIDGET
1118 #define PIDGET(PTID) (ptid_get_pid (PTID))
1119 #define TIDGET(PTID) (ptid_get_lwp (PTID))
1120 #define MERGEPID(PID, TID) ptid_build (PID, TID, 0)
1121 #endif
1122
1123 /* Define well known filenos if the system does not define them.  */
1124 #ifndef STDIN_FILENO
1125 #define STDIN_FILENO   0
1126 #endif
1127 #ifndef STDOUT_FILENO
1128 #define STDOUT_FILENO  1
1129 #endif
1130 #ifndef STDERR_FILENO
1131 #define STDERR_FILENO  2
1132 #endif
1133
1134 /* If this definition isn't overridden by the header files, assume
1135    that isatty and fileno exist on this system.  */
1136 #ifndef ISATTY
1137 #define ISATTY(FP)      (isatty (fileno (FP)))
1138 #endif
1139
1140 /* Ensure that V is aligned to an N byte boundary (B's assumed to be a
1141    power of 2).  Round up/down when necessary.  Examples of correct
1142    use include:
1143
1144    addr = align_up (addr, 8); -- VALUE needs 8 byte alignment
1145    write_memory (addr, value, len);
1146    addr += len;
1147
1148    and:
1149
1150    sp = align_down (sp - len, 16); -- Keep SP 16 byte aligned
1151    write_memory (sp, value, len);
1152
1153    Note that uses such as:
1154
1155    write_memory (addr, value, len);
1156    addr += align_up (len, 8);
1157
1158    and:
1159
1160    sp -= align_up (len, 8);
1161    write_memory (sp, value, len);
1162
1163    are typically not correct as they don't ensure that the address (SP
1164    or ADDR) is correctly aligned (relying on previous alignment to
1165    keep things right).  This is also why the methods are called
1166    "align_..." instead of "round_..." as the latter reads better with
1167    this incorrect coding style.  */
1168
1169 extern ULONGEST align_up (ULONGEST v, int n);
1170 extern ULONGEST align_down (ULONGEST v, int n);
1171
1172 /* Allocation and deallocation functions for the libiberty hash table
1173    which use obstacks.  */
1174 void *hashtab_obstack_allocate (void *data, size_t size, size_t count);
1175 void dummy_obstack_deallocate (void *object, void *data);
1176
1177 #endif /* #ifndef DEFS_H */