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