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 1986, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996,
   4    1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004
   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 2 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, write to the Free Software
  21    Foundation, Inc., 59 Temple Place - Suite 330,
  22    Boston, MA 02111-1307, USA.  */
  23
  24 #ifndef DEFS_H
  25 #define DEFS_H
  26
  27 #include "config.h"             /* Generated by configure.  */
  28
  29 #include <stdio.h>
  30 #include <errno.h>              /* System call error return status.  */
  31 #include <limits.h>
  32
  33 #ifdef HAVE_STDDEF_H
  34 #include <stddef.h>
  35 #else
  36 #include <sys/types.h>          /* For size_t.  */
  37 #endif
  38
  39 #ifdef HAVE_UNISTD_H
  40 #include <unistd.h>
  41 #endif
  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 #include <stdarg.h>             /* For va_list.  */
  63
  64 #include "libiberty.h"
  65
  66 /* For BFD64 and bfd_vma.  */
  67 #include "bfd.h"
  68
  69
  70 /* The target is partially multi-arched.  Both "tm.h" and the
  71    multi-arch vector provide definitions.  "tm.h" normally overrides
  72    the multi-arch vector (but there are a few exceptions).  */
  73
  74 #define GDB_MULTI_ARCH_PARTIAL 1
  75
  76 /* The target is partially multi-arched. Both the multi-arch vector
  77    and "tm.h" provide definitions. "tm.h" cannot override a definition
  78    provided by the multi-arch vector.  It is detected as a compilation
  79    error.
  80
  81    This setting is only useful during a multi-arch conversion. */
  82
  83 #define GDB_MULTI_ARCH_TM 2
  84
  85 /* The target is pure multi-arch.  The MULTI-ARCH vector provides all
  86    definitions.  "tm.h" is linked to an empty file. */
  87
  88 #define GDB_MULTI_ARCH_PURE 3
  89
  90
  91
  92 /* An address in the program being debugged.  Host byte order.  Rather
  93    than duplicate all the logic in BFD which figures out what type
  94    this is (long, long long, etc.) and whether it needs to be 64
  95    bits (the host/target interactions are subtle), we just use
  96    bfd_vma.  */
  97
  98 typedef bfd_vma CORE_ADDR;
  99
 100 /* This is to make sure that LONGEST is at least as big as CORE_ADDR.  */
 101
 102 #ifndef LONGEST
 103
 104 #ifdef BFD64
 105
 106 #define LONGEST BFD_HOST_64_BIT
 107 #define ULONGEST BFD_HOST_U_64_BIT
 108
 109 #else /* No BFD64 */
 110
 111 #ifdef CC_HAS_LONG_LONG
 112 #define LONGEST long long
 113 #define ULONGEST unsigned long long
 114 #else
 115 #ifdef BFD_HOST_64_BIT
 116 /* BFD_HOST_64_BIT is defined for some hosts that don't have long long
 117    (e.g. i386-windows) so try it.  */
 118 #define LONGEST BFD_HOST_64_BIT
 119 #define ULONGEST BFD_HOST_U_64_BIT
 120 #else
 121 #define LONGEST long
 122 #define ULONGEST unsigned long
 123 #endif
 124 #endif
 125
 126 #endif /* No BFD64 */
 127
 128 #endif /* ! LONGEST */
 129
 130 #ifndef min
 131 #define min(a, b) ((a) < (b) ? (a) : (b))
 132 #endif
 133 #ifndef max
 134 #define max(a, b) ((a) > (b) ? (a) : (b))
 135 #endif
 136
 137 /* Macros to do string compares.
 138
 139    NOTE: cagney/2000-03-14:
 140
 141    While old code can continue to refer to these macros, new code is
 142    probably better off using strcmp() directly vis: ``strcmp() == 0''
 143    and ``strcmp() != 0''.
 144
 145    This is because modern compilers can directly inline strcmp()
 146    making the original justification for these macros - avoid function
 147    call overhead by pre-testing the first characters
 148    (``*X==*Y?...:0'') - redundant.
 149
 150    ``Even if [...] testing the first character does have a modest
 151    performance improvement, I'd rather that whenever a performance
 152    issue is found that we spend the effort on algorithmic
 153    optimizations than micro-optimizing.'' J.T. */
 154
 155 /* NOTE: cagney/2003-11-23: All instances of STREQ[N] covered by
 156    testing GDB on a stabs system have been replaced by equivalent
 157    str[n]cmp calls.  To avoid the possability of introducing bugs when
 158    making untested changes, the remaining references were deprecated
 159    rather than replaced.  */
 160
 161 /* DISCLAIMER: cagney/2003-11-23: Simplified definition of these
 162    macros so that they just map directly onto strcmp equivalent.  I'm
 163    not responsible for any breakage due to code that relied on the old
 164    underlying implementation.  */
 165
 166 #define DEPRECATED_STREQ(a,b) (strcmp ((a), (b)) == 0)
 167 #define DEPRECATED_STREQN(a,b,c) (strncmp ((a), (b), (c)) == 0)
 168
 169 /* Check if a character is one of the commonly used C++ marker characters.  */
 170 extern int is_cplus_marker (int);
 171
 172 /* enable xdb commands if set */
 173 extern int xdb_commands;
 174
 175 /* enable dbx commands if set */
 176 extern int dbx_commands;
 177
 178 /* System root path, used to find libraries etc.  */
 179 extern char *gdb_sysroot;
 180
 181 extern int quit_flag;
 182 extern int immediate_quit;
 183 extern int sevenbit_strings;
 184
 185 extern void quit (void);
 186
 187 /* FIXME: cagney/2000-03-13: It has been suggested that the peformance
 188    benefits of having a ``QUIT'' macro rather than a function are
 189    marginal.  If the overhead of a QUIT function call is proving
 190    significant then its calling frequency should probably be reduced
 191    [kingdon].  A profile analyzing the current situtation is
 192    needed. */
 193
 194 #ifdef QUIT
 195 /* do twice to force compiler warning */
 196 #define QUIT_FIXME "FIXME"
 197 #define QUIT_FIXME "ignoring redefinition of QUIT"
 198 #else
 199 #define QUIT { \
 200   if (quit_flag) quit (); \
 201   if (deprecated_interactive_hook) deprecated_interactive_hook (); \
 202 }
 203 #endif
 204
 205 /* Languages represented in the symbol table and elsewhere.
 206    This should probably be in language.h, but since enum's can't
 207    be forward declared to satisfy opaque references before their
 208    actual definition, needs to be here. */
 209
 210 enum language
 211   {
 212     language_unknown,           /* Language not known */
 213     language_auto,              /* Placeholder for automatic setting */
 214     language_c,                 /* C */
 215     language_cplus,             /* C++ */
 216     language_objc,              /* Objective-C */
 217     language_java,              /* Java */
 218     language_fortran,           /* Fortran */
 219     language_m2,                /* Modula-2 */
 220     language_asm,               /* Assembly language */
 221     language_scm,               /* Scheme / Guile */
 222     language_pascal,            /* Pascal */
 223     language_minimal            /* All other languages, minimal support only */
 224   };
 225
 226 enum precision_type
 227   {
 228     single_precision,
 229     double_precision,
 230     unspecified_precision
 231   };
 232
 233 /* A generic, not quite boolean, enumeration.  */
 234 enum auto_boolean
 235 {
 236   AUTO_BOOLEAN_TRUE,
 237   AUTO_BOOLEAN_FALSE,
 238   AUTO_BOOLEAN_AUTO
 239 };
 240
 241 /* Potential ways that a function can return a value of a given type.  */
 242 enum return_value_convention
 243 {
 244   /* Where the return value has been squeezed into one or more
 245      registers.  */
 246   RETURN_VALUE_REGISTER_CONVENTION,
 247   /* Commonly known as the "struct return convention".  The caller
 248      passes an additional hidden first parameter to the caller.  That
 249      parameter contains the address at which the value being returned
 250      should be stored.  While typically, and historically, used for
 251      large structs, this is convention is applied to values of many
 252      different types.  */
 253   RETURN_VALUE_STRUCT_CONVENTION
 254 };
 255
 256 /* the cleanup list records things that have to be undone
 257    if an error happens (descriptors to be closed, memory to be freed, etc.)
 258    Each link in the chain records a function to call and an
 259    argument to give it.
 260
 261    Use make_cleanup to add an element to the cleanup chain.
 262    Use do_cleanups to do all cleanup actions back to a given
 263    point in the chain.  Use discard_cleanups to remove cleanups
 264    from the chain back to a given point, not doing them.  */
 265
 266 struct cleanup
 267   {
 268     struct cleanup *next;
 269     void (*function) (void *);
 270     void *arg;
 271   };
 272
 273
 274 /* The ability to declare that a function never returns is useful, but
 275    not really required to compile GDB successfully, so the NORETURN and
 276    ATTR_NORETURN macros normally expand into nothing.  */
 277
 278 /* If compiling with older versions of GCC, a function may be declared
 279    "volatile" to indicate that it does not return.  */
 280
 281 #ifndef NORETURN
 282 #if defined(__GNUC__) \
 283      && (__GNUC__ == 1 || (__GNUC__ == 2 && __GNUC_MINOR__ < 7))
 284 #define NORETURN volatile
 285 #else
 286 #define NORETURN                /* nothing */
 287 #endif
 288 #endif
 289
 290 /* GCC 2.5 and later versions define a function attribute "noreturn",
 291    which is the preferred way to declare that a function never returns.
 292    However GCC 2.7 appears to be the first version in which this fully
 293    works everywhere we use it. */
 294
 295 #ifndef ATTR_NORETURN
 296 #if defined(__GNUC__) && (__GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 7))
 297 #define ATTR_NORETURN __attribute__ ((noreturn))
 298 #else
 299 #define ATTR_NORETURN           /* nothing */
 300 #endif
 301 #endif
 302
 303 #ifndef ATTR_FORMAT
 304 #if defined(__GNUC__) && (__GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 4))
 305 #define ATTR_FORMAT(type, x, y) __attribute__ ((format(type, x, y)))
 306 #else
 307 #define ATTR_FORMAT(type, x, y) /* nothing */
 308 #endif
 309 #endif
 310
 311 /* Be conservative and use enum bitfields only with GCC.
 312    This is copied from gcc 3.3.1, system.h.  */
 313
 314 #if defined(__GNUC__) && (__GNUC__ >= 2)
 315 #define ENUM_BITFIELD(TYPE) enum TYPE
 316 #else
 317 #define ENUM_BITFIELD(TYPE) unsigned int
 318 #endif
 319
 320 /* Needed for various prototypes */
 321
 322 struct symtab;
 323 struct breakpoint;
 324 struct frame_info;
 325
 326 /* From blockframe.c */
 327
 328 extern int inside_entry_func (struct frame_info *this_frame);
 329
 330 extern int inside_main_func (CORE_ADDR pc);
 331
 332 /* From utils.c */
 333
 334 extern void initialize_utils (void);
 335
 336 extern void notice_quit (void);
 337
 338 extern int strcmp_iw (const char *, const char *);
 339
 340 extern int strcmp_iw_ordered (const char *, const char *);
 341
 342 extern int streq (const char *, const char *);
 343
 344 extern int subset_compare (char *, char *);
 345
 346 extern char *safe_strerror (int);
 347
 348 extern void init_malloc (void *);
 349
 350 extern void request_quit (int);
 351
 352 extern void do_cleanups (struct cleanup *);
 353 extern void do_final_cleanups (struct cleanup *);
 354 extern void do_run_cleanups (struct cleanup *);
 355 extern void do_exec_cleanups (struct cleanup *);
 356 extern void do_exec_error_cleanups (struct cleanup *);
 357
 358 extern void discard_cleanups (struct cleanup *);
 359 extern void discard_final_cleanups (struct cleanup *);
 360 extern void discard_exec_error_cleanups (struct cleanup *);
 361 extern void discard_my_cleanups (struct cleanup **, struct cleanup *);
 362
 363 /* NOTE: cagney/2000-03-04: This typedef is strictly for the
 364    make_cleanup function declarations below. Do not use this typedef
 365    as a cast when passing functions into the make_cleanup() code.
 366    Instead either use a bounce function or add a wrapper function.
 367    Calling a f(char*) function with f(void*) is non-portable. */
 368 typedef void (make_cleanup_ftype) (void *);
 369
 370 extern struct cleanup *make_cleanup (make_cleanup_ftype *, void *);
 371
 372 extern struct cleanup *make_cleanup_freeargv (char **);
 373
 374 struct ui_file;
 375 extern struct cleanup *make_cleanup_ui_file_delete (struct ui_file *);
 376
 377 extern struct cleanup *make_cleanup_close (int fd);
 378
 379 extern struct cleanup *make_cleanup_bfd_close (bfd *abfd);
 380
 381 extern struct cleanup *make_final_cleanup (make_cleanup_ftype *, void *);
 382
 383 extern struct cleanup *make_my_cleanup (struct cleanup **,
 384                                         make_cleanup_ftype *, void *);
 385
 386 extern struct cleanup *make_run_cleanup (make_cleanup_ftype *, void *);
 387
 388 extern struct cleanup *make_exec_cleanup (make_cleanup_ftype *, void *);
 389 extern struct cleanup *make_exec_error_cleanup (make_cleanup_ftype *, void *);
 390
 391 extern struct cleanup *save_cleanups (void);
 392 extern struct cleanup *save_final_cleanups (void);
 393 extern struct cleanup *save_my_cleanups (struct cleanup **);
 394
 395 extern void restore_cleanups (struct cleanup *);
 396 extern void restore_final_cleanups (struct cleanup *);
 397 extern void restore_my_cleanups (struct cleanup **, struct cleanup *);
 398
 399 extern void free_current_contents (void *);
 400
 401 extern void null_cleanup (void *);
 402
 403 extern int myread (int, char *, int);
 404
 405 extern int query (const char *, ...) ATTR_FORMAT (printf, 1, 2);
 406 extern int nquery (const char *, ...) ATTR_FORMAT (printf, 1, 2);
 407 extern int yquery (const char *, ...) ATTR_FORMAT (printf, 1, 2);
 408
 409 extern void init_page_info (void);
 410
 411 extern char *gdb_realpath (const char *);
 412 extern char *xfullpath (const char *);
 413
 414 extern unsigned long gnu_debuglink_crc32 (unsigned long crc,
 415                                           unsigned char *buf, size_t len);
 416
 417 /* From demangle.c */
 418
 419 extern void set_demangling_style (char *);
 420
 421 /* From tm.h */
 422
 423 struct type;
 424 typedef int (use_struct_convention_fn) (int gcc_p, struct type * value_type);
 425 extern use_struct_convention_fn generic_use_struct_convention;
 426
 427 \f
 428 /* Annotation stuff.  */
 429
 430 extern int annotation_level;    /* in stack.c */
 431 \f
 432 extern void begin_line (void);
 433
 434 extern void wrap_here (char *);
 435
 436 extern void reinitialize_more_filter (void);
 437
 438 /* Normal results */
 439 extern struct ui_file *gdb_stdout;
 440 /* Input stream */
 441 extern struct ui_file *gdb_stdin;
 442 /* Serious error notifications */
 443 extern struct ui_file *gdb_stderr;
 444 /* Log/debug/trace messages that should bypass normal stdout/stderr
 445    filtering.  For moment, always call this stream using
 446    *_unfiltered. In the very near future that restriction shall be
 447    removed - either call shall be unfiltered. (cagney 1999-06-13). */
 448 extern struct ui_file *gdb_stdlog;
 449 /* Target output that should bypass normal stdout/stderr filtering.
 450    For moment, always call this stream using *_unfiltered. In the
 451    very near future that restriction shall be removed - either call
 452    shall be unfiltered. (cagney 1999-07-02). */
 453 extern struct ui_file *gdb_stdtarg;
 454 extern struct ui_file *gdb_stdtargerr;
 455 extern struct ui_file *gdb_stdtargin;
 456
 457 #include "ui-file.h"
 458
 459 /* More generic printf like operations.  Filtered versions may return
 460    non-locally on error.  */
 461
 462 extern void fputs_filtered (const char *, struct ui_file *);
 463
 464 extern void fputs_unfiltered (const char *, struct ui_file *);
 465
 466 extern int fputc_filtered (int c, struct ui_file *);
 467
 468 extern int fputc_unfiltered (int c, struct ui_file *);
 469
 470 extern int putchar_filtered (int c);
 471
 472 extern int putchar_unfiltered (int c);
 473
 474 extern void puts_filtered (const char *);
 475
 476 extern void puts_unfiltered (const char *);
 477
 478 extern void puts_filtered_tabular (char *string, int width, int right);
 479
 480 extern void puts_debug (char *prefix, char *string, char *suffix);
 481
 482 extern void vprintf_filtered (const char *, va_list) ATTR_FORMAT (printf, 1, 0);
 483
 484 extern void vfprintf_filtered (struct ui_file *, const char *, va_list) ATTR_FORMAT (printf, 2, 0);
 485
 486 extern void fprintf_filtered (struct ui_file *, const char *, ...) ATTR_FORMAT (printf, 2, 3);
 487
 488 extern void fprintfi_filtered (int, struct ui_file *, const char *, ...) ATTR_FORMAT (printf, 3, 4);
 489
 490 extern void printf_filtered (const char *, ...) ATTR_FORMAT (printf, 1, 2);
 491
 492 extern void printfi_filtered (int, const char *, ...) ATTR_FORMAT (printf, 2, 3);
 493
 494 extern void vprintf_unfiltered (const char *, va_list) ATTR_FORMAT (printf, 1, 0);
 495
 496 extern void vfprintf_unfiltered (struct ui_file *, const char *, va_list) ATTR_FORMAT (printf, 2, 0);
 497
 498 extern void fprintf_unfiltered (struct ui_file *, const char *, ...) ATTR_FORMAT (printf, 2, 3);
 499
 500 extern void printf_unfiltered (const char *, ...) ATTR_FORMAT (printf, 1, 2);
 501
 502 extern void print_spaces (int, struct ui_file *);
 503
 504 extern void print_spaces_filtered (int, struct ui_file *);
 505
 506 extern char *n_spaces (int);
 507
 508 extern void fputstr_filtered (const char *str, int quotr, struct ui_file * stream);
 509
 510 extern void fputstr_unfiltered (const char *str, int quotr, struct ui_file * stream);
 511
 512 extern void fputstrn_unfiltered (const char *str, int n, int quotr, struct ui_file * stream);
 513
 514 /* Display the host ADDR on STREAM formatted as ``0x%x''. */
 515 extern void gdb_print_host_address (const void *addr, struct ui_file *stream);
 516
 517 /* Convert a CORE_ADDR into a HEX string.  paddr() is like %08lx.
 518    paddr_nz() is like %lx.  paddr_u() is like %lu. paddr_width() is
 519    for ``%*''. */
 520 extern int strlen_paddr (void);
 521 extern char *paddr (CORE_ADDR addr);
 522 extern char *paddr_nz (CORE_ADDR addr);
 523 extern char *paddr_u (CORE_ADDR addr);
 524 extern char *paddr_d (LONGEST addr);
 525
 526 extern char *phex (ULONGEST l, int sizeof_l);
 527 extern char *phex_nz (ULONGEST l, int sizeof_l);
 528
 529 /* Like paddr() only print/scan raw CORE_ADDR.  The output from
 530    core_addr_to_string() can be passed direct to
 531    string_to_core_addr().  */
 532 extern const char *core_addr_to_string (const CORE_ADDR addr);
 533 extern const char *core_addr_to_string_nz (const CORE_ADDR addr);
 534 extern CORE_ADDR string_to_core_addr (const char *my_string);
 535
 536 extern void fprintf_symbol_filtered (struct ui_file *, char *,
 537                                      enum language, int);
 538
 539 extern NORETURN void perror_with_name (const char *) ATTR_NORETURN;
 540
 541 extern void print_sys_errmsg (const char *, int);
 542
 543 /* From regex.c or libc.  BSD 4.4 declares this with the argument type as
 544    "const char *" in unistd.h, so we can't declare the argument
 545    as "char *".  */
 546
 547 extern char *re_comp (const char *);
 548
 549 /* From symfile.c */
 550
 551 extern void symbol_file_command (char *, int);
 552
 553 /* Remote targets may wish to use this as their load function.  */
 554 extern void generic_load (char *name, int from_tty);
 555
 556 /* Summarise a download */
 557 extern void print_transfer_performance (struct ui_file *stream,
 558                                         unsigned long data_count,
 559                                         unsigned long write_count,
 560                                         unsigned long time_count);
 561
 562 /* From top.c */
 563
 564 typedef void initialize_file_ftype (void);
 565
 566 extern char *skip_quoted (char *);
 567
 568 extern char *gdb_readline (char *);
 569
 570 extern char *gdb_readline_wrapper (char *);
 571
 572 extern char *command_line_input (char *, int, char *);
 573
 574 extern void print_prompt (void);
 575
 576 extern int input_from_terminal_p (void);
 577
 578 extern int info_verbose;
 579
 580 /* From printcmd.c */
 581
 582 extern void set_next_address (CORE_ADDR);
 583
 584 extern void print_address_symbolic (CORE_ADDR, struct ui_file *, int,
 585                                     char *);
 586
 587 extern int build_address_symbolic (CORE_ADDR addr,
 588                                    int do_demangle,
 589                                    char **name,
 590                                    int *offset,
 591                                    char **filename,
 592                                    int *line,
 593                                    int *unmapped);
 594
 595 extern void print_address_numeric (CORE_ADDR, int, struct ui_file *);
 596
 597 extern void print_address (CORE_ADDR, struct ui_file *);
 598
 599 /* From source.c */
 600
 601 extern int openp (const char *, int, const char *, int, int, char **);
 602
 603 extern int source_full_path_of (char *, char **);
 604
 605 extern void mod_path (char *, char **);
 606
 607 extern void add_path (char *, char **, int);
 608
 609 extern void directory_command (char *, int);
 610
 611 extern char *source_path;
 612
 613 extern void init_source_path (void);
 614
 615 extern void init_last_source_visited (void);
 616
 617 extern char *symtab_to_filename (struct symtab *);
 618
 619 /* From exec.c */
 620
 621 extern void exec_set_section_offsets (bfd_signed_vma text_off,
 622                                       bfd_signed_vma data_off,
 623                                       bfd_signed_vma bss_off);
 624
 625 /* Take over the 'find_mapped_memory' vector from exec.c. */
 626 extern void exec_set_find_memory_regions (int (*) (int (*) (CORE_ADDR,
 627                                                             unsigned long,
 628                                                             int, int, int,
 629                                                             void *),
 630                                                    void *));
 631
 632 /* Possible lvalue types.  Like enum language, this should be in
 633    value.h, but needs to be here for the same reason. */
 634
 635 enum lval_type
 636   {
 637     /* Not an lval. */
 638     not_lval,
 639     /* In memory.  Could be a saved register.  */
 640     lval_memory,
 641     /* In a register.  */
 642     lval_register,
 643     /* In a gdb internal variable.  */
 644     lval_internalvar,
 645     /* Part of a gdb internal variable (structure field).  */
 646     lval_internalvar_component,
 647     /* In a register series in a frame not the current one, which may have been
 648        partially saved or saved in different places (otherwise would be
 649        lval_register or lval_memory).  */
 650     lval_reg_frame_relative
 651   };
 652
 653 /* Control types for commands */
 654
 655 enum misc_command_type
 656   {
 657     ok_command,
 658     end_command,
 659     else_command,
 660     nop_command
 661   };
 662
 663 enum command_control_type
 664   {
 665     simple_control,
 666     break_control,
 667     continue_control,
 668     while_control,
 669     if_control,
 670     invalid_control
 671   };
 672
 673 /* Structure for saved commands lines
 674    (for breakpoints, defined commands, etc).  */
 675
 676 struct command_line
 677   {
 678     struct command_line *next;
 679     char *line;
 680     enum command_control_type control_type;
 681     int body_count;
 682     struct command_line **body_list;
 683   };
 684
 685 extern struct command_line *read_command_lines (char *, int);
 686
 687 extern void free_command_lines (struct command_line **);
 688
 689 /* To continue the execution commands when running gdb asynchronously.
 690    A continuation structure contains a pointer to a function to be called
 691    to finish the command, once the target has stopped. Such mechanism is
 692    used bt the finish and until commands, and in the remote protocol
 693    when opening an extended-remote connection. */
 694
 695 struct continuation_arg
 696   {
 697     struct continuation_arg *next;
 698     union continuation_data {
 699       void *pointer;
 700       int   integer;
 701       long  longint;
 702     } data;
 703   };
 704
 705 struct continuation
 706   {
 707     void (*continuation_hook) (struct continuation_arg *);
 708     struct continuation_arg *arg_list;
 709     struct continuation *next;
 710   };
 711
 712 /* In infrun.c. */
 713 extern struct continuation *cmd_continuation;
 714 /* Used only by the step_1 function. */
 715 extern struct continuation *intermediate_continuation;
 716
 717 /* From utils.c */
 718 extern void add_continuation (void (*)(struct continuation_arg *),
 719                               struct continuation_arg *);
 720 extern void do_all_continuations (void);
 721 extern void discard_all_continuations (void);
 722
 723 extern void add_intermediate_continuation (void (*)(struct continuation_arg *),
 724                               struct continuation_arg *);
 725 extern void do_all_intermediate_continuations (void);
 726 extern void discard_all_intermediate_continuations (void);
 727
 728 /* String containing the current directory (what getwd would return).  */
 729
 730 extern char *current_directory;
 731
 732 /* Default radixes for input and output.  Only some values supported.  */
 733 extern unsigned input_radix;
 734 extern unsigned output_radix;
 735
 736 /* Possibilities for prettyprint parameters to routines which print
 737    things.  Like enum language, this should be in value.h, but needs
 738    to be here for the same reason.  FIXME:  If we can eliminate this
 739    as an arg to LA_VAL_PRINT, then we can probably move it back to
 740    value.h. */
 741
 742 enum val_prettyprint
 743   {
 744     Val_no_prettyprint = 0,
 745     Val_prettyprint,
 746     /* Use the default setting which the user has specified.  */
 747     Val_pretty_default
 748   };
 749
 750 /* The ptid struct is a collection of the various "ids" necessary
 751    for identifying the inferior.  This consists of the process id
 752    (pid), thread id (tid), and other fields necessary for uniquely
 753    identifying the inferior process/thread being debugged.  When
 754    manipulating ptids, the constructors, accessors, and predicate
 755    declared in inferior.h should be used.  These are as follows:
 756
 757       ptid_build        - Make a new ptid from a pid, lwp, and tid.
 758       pid_to_ptid       - Make a new ptid from just a pid.
 759       ptid_get_pid      - Fetch the pid component of a ptid.
 760       ptid_get_lwp      - Fetch the lwp component of a ptid.
 761       ptid_get_tid      - Fetch the tid component of a ptid.
 762       ptid_equal        - Test to see if two ptids are equal.
 763
 764    Please do NOT access the struct ptid members directly (except, of
 765    course, in the implementation of the above ptid manipulation
 766    functions).  */
 767
 768 struct ptid
 769   {
 770     /* Process id */
 771     int pid;
 772
 773     /* Lightweight process id */
 774     long lwp;
 775
 776     /* Thread id */
 777     long tid;
 778   };
 779
 780 typedef struct ptid ptid_t;
 781
 782 \f
 783
 784 /* Optional host machine definition.  Pure autoconf targets will not
 785    need a "xm.h" file.  This will be a symlink to one of the xm-*.h
 786    files, built by the `configure' script.  */
 787
 788 #ifdef GDB_XM_FILE
 789 #include "xm.h"
 790 #endif
 791
 792 /* Optional native machine support.  Non-native (and possibly pure
 793    multi-arch) targets do not need a "nm.h" file.  This will be a
 794    symlink to one of the nm-*.h files, built by the `configure'
 795    script.  */
 796
 797 #ifdef GDB_NM_FILE
 798 #include "nm.h"
 799 #endif
 800
 801 /* Optional target machine definition.  Pure multi-arch configurations
 802    do not need a "tm.h" file.  This will be a symlink to one of the
 803    tm-*.h files, built by the `configure' script.  */
 804
 805 #ifdef GDB_TM_FILE
 806 #include "tm.h"
 807 #endif
 808
 809 /* If the xm.h file did not define the mode string used to open the
 810    files, assume that binary files are opened the same way as text
 811    files */
 812 #ifndef FOPEN_RB
 813 #include "fopen-same.h"
 814 #endif
 815
 816 /* Defaults for system-wide constants (if not defined by xm.h, we fake it).
 817    FIXME: Assumes 2's complement arithmetic */
 818
 819 #if !defined (UINT_MAX)
 820 #define UINT_MAX ((unsigned int)(~0))   /* 0xFFFFFFFF for 32-bits */
 821 #endif
 822
 823 #if !defined (INT_MAX)
 824 #define INT_MAX ((int)(UINT_MAX >> 1))  /* 0x7FFFFFFF for 32-bits */
 825 #endif
 826
 827 #if !defined (INT_MIN)
 828 #define INT_MIN ((int)((int) ~0 ^ INT_MAX))     /* 0x80000000 for 32-bits */
 829 #endif
 830
 831 #if !defined (ULONG_MAX)
 832 #define ULONG_MAX ((unsigned long)(~0L))        /* 0xFFFFFFFF for 32-bits */
 833 #endif
 834
 835 #if !defined (LONG_MAX)
 836 #define LONG_MAX ((long)(ULONG_MAX >> 1))       /* 0x7FFFFFFF for 32-bits */
 837 #endif
 838
 839 #if !defined (ULONGEST_MAX)
 840 #define ULONGEST_MAX (~(ULONGEST)0)        /* 0xFFFFFFFFFFFFFFFF for 64-bits */
 841 #endif
 842
 843 #if !defined (LONGEST_MAX)                 /* 0x7FFFFFFFFFFFFFFF for 64-bits */
 844 #define LONGEST_MAX ((LONGEST)(ULONGEST_MAX >> 1))
 845 #endif
 846
 847 /* Convert a LONGEST to an int.  This is used in contexts (e.g. number of
 848    arguments to a function, number in a value history, register number, etc.)
 849    where the value must not be larger than can fit in an int.  */
 850
 851 extern int longest_to_int (LONGEST);
 852
 853 /* Assorted functions we can declare, now that const and volatile are
 854    defined.  */
 855
 856 extern char *savestring (const char *, size_t);
 857
 858 extern char *msavestring (void *, const char *, size_t);
 859
 860 extern char *mstrsave (void *, const char *);
 861
 862 /* Robust versions of same.  Throw an internal error when no memory,
 863    guard against stray NULL arguments. */
 864 extern void *xmmalloc (void *md, size_t size);
 865 extern void *xmrealloc (void *md, void *ptr, size_t size);
 866 extern void *xmcalloc (void *md, size_t number, size_t size);
 867 extern void xmfree (void *md, void *ptr);
 868
 869 /* xmalloc(), xrealloc() and xcalloc() have already been declared in
 870    "libiberty.h". */
 871 extern void xfree (void *);
 872
 873 /* Utility macros to allocate typed memory.  Avoids errors like:
 874    struct foo *foo = xmalloc (sizeof struct bar); and memset (foo,
 875    sizeof (struct foo), 0).  */
 876 #define XZALLOC(TYPE) ((TYPE*) memset (xmalloc (sizeof (TYPE)), 0, sizeof (TYPE)))
 877 #define XMALLOC(TYPE) ((TYPE*) xmalloc (sizeof (TYPE)))
 878 #define XCALLOC(NMEMB, TYPE) ((TYPE*) xcalloc ((NMEMB), sizeof (TYPE)))
 879
 880 /* Like asprintf/vasprintf but get an internal_error if the call
 881    fails. */
 882 extern void xasprintf (char **ret, const char *format, ...) ATTR_FORMAT (printf, 2, 3);
 883 extern void xvasprintf (char **ret, const char *format, va_list ap);
 884
 885 /* Like asprintf, but return the string, throw an error if no memory.  */
 886 extern char *xstrprintf (const char *format, ...) ATTR_FORMAT (printf, 1, 2);
 887
 888 extern int parse_escape (char **);
 889
 890 /* Message to be printed before the error message, when an error occurs.  */
 891
 892 extern char *error_pre_print;
 893
 894 /* Message to be printed before the error message, when an error occurs.  */
 895
 896 extern char *quit_pre_print;
 897
 898 /* Message to be printed before the warning message, when a warning occurs.  */
 899
 900 extern char *warning_pre_print;
 901
 902 extern NORETURN void verror (const char *fmt, va_list ap) ATTR_NORETURN;
 903
 904 extern NORETURN void error (const char *fmt, ...) ATTR_NORETURN ATTR_FORMAT (printf, 1, 2);
 905
 906 extern NORETURN void error_silent (const char *fmt, ...) ATTR_NORETURN ATTR_FORMAT (printf, 1, 2);
 907
 908 extern NORETURN void error_stream (struct ui_file *) ATTR_NORETURN;
 909
 910 /* Initialize the error buffer.  */
 911 extern void error_init (void);
 912
 913 /* Returns a freshly allocate buffer containing the last error
 914    message.  */
 915 extern char *error_last_message (void);
 916
 917 /* Output arbitrary error message.  */
 918 extern void error_output_message (char *pre_print, char *msg);
 919
 920 extern NORETURN void internal_verror (const char *file, int line,
 921                                       const char *, va_list ap) ATTR_NORETURN;
 922
 923 extern NORETURN void internal_error (const char *file, int line,
 924                                      const char *, ...) ATTR_NORETURN ATTR_FORMAT (printf, 3, 4);
 925
 926 extern void internal_vwarning (const char *file, int line,
 927                                const char *, va_list ap);
 928
 929 extern void internal_warning (const char *file, int line,
 930                               const char *, ...) ATTR_FORMAT (printf, 3, 4);
 931
 932 extern NORETURN void nomem (long) ATTR_NORETURN;
 933
 934 /* Reasons for calling throw_exception().  NOTE: all reason values
 935    must be less than zero.  enum value 0 is reserved for internal use
 936    as the return value from an initial setjmp().  The function
 937    catch_exceptions() reserves values >= 0 as legal results from its
 938    wrapped function.  */
 939
 940 enum return_reason
 941   {
 942     /* User interrupt.  */
 943     RETURN_QUIT = -2,
 944     /* Any other error.  */
 945     RETURN_ERROR
 946   };
 947
 948 #define ALL_CLEANUPS    ((struct cleanup *)0)
 949
 950 #define RETURN_MASK(reason)     (1 << (int)(-reason))
 951 #define RETURN_MASK_QUIT        RETURN_MASK (RETURN_QUIT)
 952 #define RETURN_MASK_ERROR       RETURN_MASK (RETURN_ERROR)
 953 #define RETURN_MASK_ALL         (RETURN_MASK_QUIT | RETURN_MASK_ERROR)
 954 typedef int return_mask;
 955
 956 /* Throw an exception of type RETURN_REASON.  Will execute a LONG JUMP
 957    to the inner most containing exception handler established using
 958    catch_exceptions() (or the legacy catch_errors()).
 959
 960    Code normally throws an exception using error() et.al.  For various
 961    reaons, GDB also contains code that throws an exception directly.
 962    For instance, the remote*.c targets contain CNTRL-C signal handlers
 963    that propogate the QUIT event up the exception chain.  ``This could
 964    be a good thing or a dangerous thing.'' -- the Existential Wombat.  */
 965
 966 extern NORETURN void throw_exception (enum return_reason) ATTR_NORETURN;
 967
 968 /* Call FUNC(UIOUT, FUNC_ARGS) but wrapped within an exception
 969    handler.  If an exception (enum return_reason) is thrown using
 970    throw_exception() than all cleanups installed since
 971    catch_exceptions() was entered are invoked, the (-ve) exception
 972    value is then returned by catch_exceptions.  If FUNC() returns
 973    normally (with a postive or zero return value) then that value is
 974    returned by catch_exceptions().  It is an internal_error() for
 975    FUNC() to return a negative value.
 976
 977    For the period of the FUNC() call: UIOUT is installed as the output
 978    builder; ERRSTRING is installed as the error/quit message; and a
 979    new cleanup_chain is established.  The old values are restored
 980    before catch_exceptions() returns.
 981
 982    The variant catch_exceptions_with_msg() is the same as
 983    catch_exceptions() but adds the ability to return an allocated
 984    copy of the gdb error message.  This is used when a silent error is
 985    issued and the caller wants to manually issue the error message.
 986
 987    FIXME; cagney/2001-08-13: The need to override the global UIOUT
 988    builder variable should just go away.
 989
 990    This function superseeds catch_errors().
 991
 992    This function uses SETJMP() and LONGJUMP().  */
 993
 994 struct ui_out;
 995 typedef int (catch_exceptions_ftype) (struct ui_out *ui_out, void *args);
 996 extern int catch_exceptions (struct ui_out *uiout,
 997                              catch_exceptions_ftype *func, void *func_args,
 998                              char *errstring, return_mask mask);
 999 extern int catch_exceptions_with_msg (struct ui_out *uiout,
1000                                       catch_exceptions_ftype *func,
1001                                       void *func_args,
1002                                       char *errstring, char **gdberrmsg,
1003                                       return_mask mask);
1004
1005 /* If CATCH_ERRORS_FTYPE throws an error, catch_errors() returns zero
1006    otherwize the result from CATCH_ERRORS_FTYPE is returned. It is
1007    probably useful for CATCH_ERRORS_FTYPE to always return a non-zero
1008    value. It's unfortunate that, catch_errors() does not return an
1009    indication of the exact exception that it caught - quit_flag might
1010    help.
1011
1012    This function is superseeded by catch_exceptions().  */
1013
1014 typedef int (catch_errors_ftype) (void *);
1015 extern int catch_errors (catch_errors_ftype *, void *, char *, return_mask);
1016
1017 /* Template to catch_errors() that wraps calls to command
1018    functions. */
1019
1020 typedef void (catch_command_errors_ftype) (char *, int);
1021 extern int catch_command_errors (catch_command_errors_ftype *func, char *command, int from_tty, return_mask);
1022
1023 extern void warning (const char *, ...) ATTR_FORMAT (printf, 1, 2);
1024
1025 extern void vwarning (const char *, va_list args);
1026
1027 /* List of known OS ABIs.  If you change this, make sure to update the
1028    table in osabi.c.  */
1029 enum gdb_osabi
1030 {
1031   GDB_OSABI_UNINITIALIZED = -1, /* For struct gdbarch_info.  */
1032
1033   GDB_OSABI_UNKNOWN = 0,        /* keep this zero */
1034
1035   GDB_OSABI_SVR4,
1036   GDB_OSABI_HURD,
1037   GDB_OSABI_SOLARIS,
1038   GDB_OSABI_OSF1,
1039   GDB_OSABI_LINUX,
1040   GDB_OSABI_FREEBSD_AOUT,
1041   GDB_OSABI_FREEBSD_ELF,
1042   GDB_OSABI_NETBSD_AOUT,
1043   GDB_OSABI_NETBSD_ELF,
1044   GDB_OSABI_OPENBSD_ELF,
1045   GDB_OSABI_WINCE,
1046   GDB_OSABI_GO32,
1047   GDB_OSABI_NETWARE,
1048   GDB_OSABI_IRIX,
1049   GDB_OSABI_LYNXOS,
1050   GDB_OSABI_INTERIX,
1051   GDB_OSABI_HPUX_ELF,
1052   GDB_OSABI_HPUX_SOM,
1053
1054   GDB_OSABI_ARM_EABI_V1,
1055   GDB_OSABI_ARM_EABI_V2,
1056   GDB_OSABI_ARM_APCS,
1057   GDB_OSABI_QNXNTO,
1058
1059   GDB_OSABI_CYGWIN,
1060
1061   GDB_OSABI_INVALID             /* keep this last */
1062 };
1063
1064 /* Global functions from other, non-gdb GNU thingies.
1065    Libiberty thingies are no longer declared here.  We include libiberty.h
1066    above, instead.  */
1067
1068 #ifndef GETENV_PROVIDED
1069 extern char *getenv (const char *);
1070 #endif
1071
1072 /* From other system libraries */
1073
1074 #ifdef HAVE_STDDEF_H
1075 #include <stddef.h>
1076 #endif
1077
1078 #ifdef HAVE_STDLIB_H
1079 #include <stdlib.h>
1080 #endif
1081 #ifndef min
1082 #define min(a, b) ((a) < (b) ? (a) : (b))
1083 #endif
1084 #ifndef max
1085 #define max(a, b) ((a) > (b) ? (a) : (b))
1086 #endif
1087
1088
1089 /* We take the address of fclose later, but some stdio's forget
1090    to declare this.  We can't always declare it since there's
1091    no way to declare the parameters without upsetting some compiler
1092    somewhere. */
1093
1094 #ifndef FCLOSE_PROVIDED
1095 extern int fclose (FILE *);
1096 #endif
1097
1098 #ifndef atof
1099 extern double atof (const char *);      /* X3.159-1989  4.10.1.1 */
1100 #endif
1101
1102 /* Various possibilities for alloca.  */
1103 #ifndef alloca
1104 #ifdef __GNUC__
1105 #define alloca __builtin_alloca
1106 #else /* Not GNU C */
1107 #ifdef HAVE_ALLOCA_H
1108 #include <alloca.h>
1109 #else
1110 #ifdef _AIX
1111 #pragma alloca
1112 #else
1113
1114 /* We need to be careful not to declare this in a way which conflicts with
1115    bison.  Bison never declares it as char *, but under various circumstances
1116    (like __hpux) we need to use void *.  */
1117 extern void *alloca ();
1118 #endif /* Not _AIX */
1119 #endif /* Not HAVE_ALLOCA_H */
1120 #endif /* Not GNU C */
1121 #endif /* alloca not defined */
1122
1123 /* Is GDB multi-arch?  If there's a "tm.h" file, it is not.  */
1124 #ifndef GDB_MULTI_ARCH
1125 #ifdef GDB_TM_FILE
1126 #define GDB_MULTI_ARCH GDB_MULTI_ARCH_PARTIAL
1127 #else
1128 #define GDB_MULTI_ARCH GDB_MULTI_ARCH_PURE
1129 #endif
1130 #endif
1131
1132 /* Dynamic target-system-dependent parameters for GDB. */
1133 #include "gdbarch.h"
1134
1135 /* Maximum size of a register.  Something small, but large enough for
1136    all known ISAs.  If it turns out to be too small, make it bigger.  */
1137
1138 enum { MAX_REGISTER_SIZE = 16 };
1139
1140 /* Static target-system-dependent parameters for GDB. */
1141
1142 /* Number of bits in a char or unsigned char for the target machine.
1143    Just like CHAR_BIT in <limits.h> but describes the target machine.  */
1144 #if !defined (TARGET_CHAR_BIT)
1145 #define TARGET_CHAR_BIT 8
1146 #endif
1147
1148 /* If we picked up a copy of CHAR_BIT from a configuration file
1149    (which may get it by including <limits.h>) then use it to set
1150    the number of bits in a host char.  If not, use the same size
1151    as the target. */
1152
1153 #if defined (CHAR_BIT)
1154 #define HOST_CHAR_BIT CHAR_BIT
1155 #else
1156 #define HOST_CHAR_BIT TARGET_CHAR_BIT
1157 #endif
1158
1159 /* The bit byte-order has to do just with numbering of bits in
1160    debugging symbols and such.  Conceptually, it's quite separate
1161    from byte/word byte order.  */
1162
1163 #if !defined (BITS_BIG_ENDIAN)
1164 #define BITS_BIG_ENDIAN (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG)
1165 #endif
1166
1167 /* In findvar.c.  */
1168
1169 extern LONGEST extract_signed_integer (const void *, int);
1170
1171 extern ULONGEST extract_unsigned_integer (const void *, int);
1172
1173 extern int extract_long_unsigned_integer (const void *, int, LONGEST *);
1174
1175 extern CORE_ADDR extract_typed_address (const void *buf, struct type *type);
1176
1177 extern void store_signed_integer (void *, int, LONGEST);
1178
1179 extern void store_unsigned_integer (void *, int, ULONGEST);
1180
1181 extern void store_typed_address (void *buf, struct type *type, CORE_ADDR addr);
1182
1183 \f
1184 /* From valops.c */
1185
1186 extern CORE_ADDR push_bytes (CORE_ADDR, char *, int);
1187
1188 extern CORE_ADDR push_word (CORE_ADDR, ULONGEST);
1189
1190 extern int watchdog;
1191
1192 /* Hooks for alternate command interfaces.  */
1193
1194 /* The name of the interpreter if specified on the command line. */
1195 extern char *interpreter_p;
1196
1197 /* If a given interpreter matches INTERPRETER_P then it should update
1198    deprecated_command_loop_hook and deprecated_init_ui_hook with the
1199    per-interpreter implementation.  */
1200 /* FIXME: deprecated_command_loop_hook and deprecated_init_ui_hook
1201    should be moved here. */
1202
1203 struct target_waitstatus;
1204 struct cmd_list_element;
1205
1206 /* Should the asynchronous variant of the interpreter (using the
1207    event-loop) be enabled? */
1208 extern int event_loop_p;
1209
1210 extern void (*deprecated_init_ui_hook) (char *argv0);
1211 extern void (*deprecated_command_loop_hook) (void);
1212 extern void (*deprecated_show_load_progress) (const char *section,
1213                                               unsigned long section_sent,
1214                                               unsigned long section_size,
1215                                               unsigned long total_sent,
1216                                               unsigned long total_size);
1217 extern void (*deprecated_print_frame_info_listing_hook) (struct symtab * s,
1218                                                          int line, int stopline,
1219                                                          int noerror);
1220 extern struct frame_info *parse_frame_specification (char *frame_exp);
1221 extern int (*deprecated_query_hook) (const char *, va_list);
1222 extern void (*deprecated_warning_hook) (const char *, va_list);
1223 extern void (*deprecated_flush_hook) (struct ui_file * stream);
1224 extern void (*deprecated_create_breakpoint_hook) (struct breakpoint * b);
1225 extern void (*deprecated_delete_breakpoint_hook) (struct breakpoint * bpt);
1226 extern void (*deprecated_modify_breakpoint_hook) (struct breakpoint * bpt);
1227 extern void (*deprecated_interactive_hook) (void);
1228 extern void (*deprecated_registers_changed_hook) (void);
1229 extern void (*deprecated_readline_begin_hook) (char *,...);
1230 extern char *(*deprecated_readline_hook) (char *);
1231 extern void (*deprecated_readline_end_hook) (void);
1232 extern void (*deprecated_register_changed_hook) (int regno);
1233 extern void (*deprecated_memory_changed_hook) (CORE_ADDR addr, int len);
1234 extern void (*deprecated_context_hook) (int);
1235 extern ptid_t (*deprecated_target_wait_hook) (ptid_t ptid,
1236                                          struct target_waitstatus * status);
1237
1238 extern void (*deprecated_attach_hook) (void);
1239 extern void (*deprecated_detach_hook) (void);
1240 extern void (*deprecated_call_command_hook) (struct cmd_list_element * c,
1241                                              char *cmd, int from_tty);
1242
1243 extern void (*deprecated_set_hook) (struct cmd_list_element * c);
1244
1245 extern NORETURN void (*deprecated_error_hook) (void) ATTR_NORETURN;
1246
1247 extern void (*deprecated_error_begin_hook) (void);
1248
1249 extern int (*deprecated_ui_load_progress_hook) (const char *section,
1250                                                 unsigned long num);
1251
1252
1253 /* Inhibit window interface if non-zero. */
1254
1255 extern int use_windows;
1256
1257 /* Symbolic definitions of filename-related things.  */
1258 /* FIXME, this doesn't work very well if host and executable
1259    filesystems conventions are different.  */
1260
1261 #ifndef DIRNAME_SEPARATOR
1262 #define DIRNAME_SEPARATOR ':'
1263 #endif
1264
1265 #ifndef SLASH_STRING
1266 #define SLASH_STRING "/"
1267 #endif
1268
1269 #ifdef __MSDOS__
1270 # define CANT_FORK
1271 # define GLOBAL_CURDIR
1272 #endif
1273
1274 /* Provide default definitions of PIDGET, TIDGET, and MERGEPID.
1275    The name ``TIDGET'' is a historical accident.  Many uses of TIDGET
1276    in the code actually refer to a lightweight process id, i.e,
1277    something that can be considered a process id in its own right for
1278    certain purposes.  */
1279
1280 #ifndef PIDGET
1281 #define PIDGET(PTID) (ptid_get_pid (PTID))
1282 #define TIDGET(PTID) (ptid_get_lwp (PTID))
1283 #define MERGEPID(PID, TID) ptid_build (PID, TID, 0)
1284 #endif
1285
1286 /* Define well known filenos if the system does not define them.  */
1287 #ifndef STDIN_FILENO
1288 #define STDIN_FILENO   0
1289 #endif
1290 #ifndef STDOUT_FILENO
1291 #define STDOUT_FILENO  1
1292 #endif
1293 #ifndef STDERR_FILENO
1294 #define STDERR_FILENO  2
1295 #endif
1296
1297 /* If this definition isn't overridden by the header files, assume
1298    that isatty and fileno exist on this system.  */
1299 #ifndef ISATTY
1300 #define ISATTY(FP)      (isatty (fileno (FP)))
1301 #endif
1302
1303 /* Ensure that V is aligned to an N byte boundary (B's assumed to be a
1304    power of 2).  Round up/down when necessary.  Examples of correct
1305    use include:
1306
1307    addr = align_up (addr, 8); -- VALUE needs 8 byte alignment
1308    write_memory (addr, value, len);
1309    addr += len;
1310
1311    and:
1312
1313    sp = align_down (sp - len, 16); -- Keep SP 16 byte aligned
1314    write_memory (sp, value, len);
1315
1316    Note that uses such as:
1317
1318    write_memory (addr, value, len);
1319    addr += align_up (len, 8);
1320
1321    and:
1322
1323    sp -= align_up (len, 8);
1324    write_memory (sp, value, len);
1325
1326    are typically not correct as they don't ensure that the address (SP
1327    or ADDR) is correctly aligned (relying on previous alignment to
1328    keep things right).  This is also why the methods are called
1329    "align_..." instead of "round_..." as the latter reads better with
1330    this incorrect coding style.  */
1331
1332 extern ULONGEST align_up (ULONGEST v, int n);
1333 extern ULONGEST align_down (ULONGEST v, int n);
1334
1335 #endif /* #ifndef DEFS_H */