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 (interactive_hook) 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 deprecated_inside_entry_file (CORE_ADDR addr);
 331
 332 extern int inside_main_func (CORE_ADDR pc);
 333
 334 /* From utils.c */
 335
 336 extern void initialize_utils (void);
 337
 338 extern void notice_quit (void);
 339
 340 extern int strcmp_iw (const char *, const char *);
 341
 342 extern int strcmp_iw_ordered (const char *, const char *);
 343
 344 extern int streq (const char *, const char *);
 345
 346 extern int subset_compare (char *, char *);
 347
 348 extern char *safe_strerror (int);
 349
 350 extern void init_malloc (void *);
 351
 352 extern void request_quit (int);
 353
 354 extern void do_cleanups (struct cleanup *);
 355 extern void do_final_cleanups (struct cleanup *);
 356 extern void do_run_cleanups (struct cleanup *);
 357 extern void do_exec_cleanups (struct cleanup *);
 358 extern void do_exec_error_cleanups (struct cleanup *);
 359
 360 extern void discard_cleanups (struct cleanup *);
 361 extern void discard_final_cleanups (struct cleanup *);
 362 extern void discard_exec_error_cleanups (struct cleanup *);
 363 extern void discard_my_cleanups (struct cleanup **, struct cleanup *);
 364
 365 /* NOTE: cagney/2000-03-04: This typedef is strictly for the
 366    make_cleanup function declarations below. Do not use this typedef
 367    as a cast when passing functions into the make_cleanup() code.
 368    Instead either use a bounce function or add a wrapper function.
 369    Calling a f(char*) function with f(void*) is non-portable. */
 370 typedef void (make_cleanup_ftype) (void *);
 371
 372 extern struct cleanup *make_cleanup (make_cleanup_ftype *, void *);
 373
 374 extern struct cleanup *make_cleanup_freeargv (char **);
 375
 376 struct ui_file;
 377 extern struct cleanup *make_cleanup_ui_file_delete (struct ui_file *);
 378
 379 extern struct cleanup *make_cleanup_close (int fd);
 380
 381 extern struct cleanup *make_cleanup_bfd_close (bfd *abfd);
 382
 383 extern struct cleanup *make_final_cleanup (make_cleanup_ftype *, void *);
 384
 385 extern struct cleanup *make_my_cleanup (struct cleanup **,
 386                                         make_cleanup_ftype *, void *);
 387
 388 extern struct cleanup *make_run_cleanup (make_cleanup_ftype *, void *);
 389
 390 extern struct cleanup *make_exec_cleanup (make_cleanup_ftype *, void *);
 391 extern struct cleanup *make_exec_error_cleanup (make_cleanup_ftype *, void *);
 392
 393 extern struct cleanup *save_cleanups (void);
 394 extern struct cleanup *save_final_cleanups (void);
 395 extern struct cleanup *save_my_cleanups (struct cleanup **);
 396
 397 extern void restore_cleanups (struct cleanup *);
 398 extern void restore_final_cleanups (struct cleanup *);
 399 extern void restore_my_cleanups (struct cleanup **, struct cleanup *);
 400
 401 extern void free_current_contents (void *);
 402
 403 extern void null_cleanup (void *);
 404
 405 extern int myread (int, char *, int);
 406
 407 extern int query (const char *, ...) ATTR_FORMAT (printf, 1, 2);
 408 extern int nquery (const char *, ...) ATTR_FORMAT (printf, 1, 2);
 409 extern int yquery (const char *, ...) ATTR_FORMAT (printf, 1, 2);
 410
 411 extern void init_page_info (void);
 412
 413 extern char *gdb_realpath (const char *);
 414 extern char *xfullpath (const char *);
 415
 416 extern unsigned long gnu_debuglink_crc32 (unsigned long crc,
 417                                           unsigned char *buf, size_t len);
 418
 419 /* From demangle.c */
 420
 421 extern void set_demangling_style (char *);
 422
 423 /* From tm.h */
 424
 425 struct type;
 426 typedef int (use_struct_convention_fn) (int gcc_p, struct type * value_type);
 427 extern use_struct_convention_fn generic_use_struct_convention;
 428
 429 \f
 430 /* Annotation stuff.  */
 431
 432 extern int annotation_level;    /* in stack.c */
 433 \f
 434 extern void begin_line (void);
 435
 436 extern void wrap_here (char *);
 437
 438 extern void reinitialize_more_filter (void);
 439
 440 /* Normal results */
 441 extern struct ui_file *gdb_stdout;
 442 /* Input stream */
 443 extern struct ui_file *gdb_stdin;
 444 /* Serious error notifications */
 445 extern struct ui_file *gdb_stderr;
 446 /* Log/debug/trace messages that should bypass normal stdout/stderr
 447    filtering.  For moment, always call this stream using
 448    *_unfiltered. In the very near future that restriction shall be
 449    removed - either call shall be unfiltered. (cagney 1999-06-13). */
 450 extern struct ui_file *gdb_stdlog;
 451 /* Target output that should bypass normal stdout/stderr filtering.
 452    For moment, always call this stream using *_unfiltered. In the
 453    very near future that restriction shall be removed - either call
 454    shall be unfiltered. (cagney 1999-07-02). */
 455 extern struct ui_file *gdb_stdtarg;
 456 extern struct ui_file *gdb_stdtargerr;
 457 extern struct ui_file *gdb_stdtargin;
 458
 459 #include "ui-file.h"
 460
 461 /* More generic printf like operations.  Filtered versions may return
 462    non-locally on error.  */
 463
 464 extern void fputs_filtered (const char *, struct ui_file *);
 465
 466 extern void fputs_unfiltered (const char *, struct ui_file *);
 467
 468 extern int fputc_filtered (int c, struct ui_file *);
 469
 470 extern int fputc_unfiltered (int c, struct ui_file *);
 471
 472 extern int putchar_filtered (int c);
 473
 474 extern int putchar_unfiltered (int c);
 475
 476 extern void puts_filtered (const char *);
 477
 478 extern void puts_unfiltered (const char *);
 479
 480 extern void puts_filtered_tabular (char *string, int width, int right);
 481
 482 extern void puts_debug (char *prefix, char *string, char *suffix);
 483
 484 extern void vprintf_filtered (const char *, va_list) ATTR_FORMAT (printf, 1, 0);
 485
 486 extern void vfprintf_filtered (struct ui_file *, const char *, va_list) ATTR_FORMAT (printf, 2, 0);
 487
 488 extern void fprintf_filtered (struct ui_file *, const char *, ...) ATTR_FORMAT (printf, 2, 3);
 489
 490 extern void fprintfi_filtered (int, struct ui_file *, const char *, ...) ATTR_FORMAT (printf, 3, 4);
 491
 492 extern void printf_filtered (const char *, ...) ATTR_FORMAT (printf, 1, 2);
 493
 494 extern void printfi_filtered (int, const char *, ...) ATTR_FORMAT (printf, 2, 3);
 495
 496 extern void vprintf_unfiltered (const char *, va_list) ATTR_FORMAT (printf, 1, 0);
 497
 498 extern void vfprintf_unfiltered (struct ui_file *, const char *, va_list) ATTR_FORMAT (printf, 2, 0);
 499
 500 extern void fprintf_unfiltered (struct ui_file *, const char *, ...) ATTR_FORMAT (printf, 2, 3);
 501
 502 extern void printf_unfiltered (const char *, ...) ATTR_FORMAT (printf, 1, 2);
 503
 504 extern void print_spaces (int, struct ui_file *);
 505
 506 extern void print_spaces_filtered (int, struct ui_file *);
 507
 508 extern char *n_spaces (int);
 509
 510 extern void fputstr_filtered (const char *str, int quotr, struct ui_file * stream);
 511
 512 extern void fputstr_unfiltered (const char *str, int quotr, struct ui_file * stream);
 513
 514 extern void fputstrn_unfiltered (const char *str, int n, int quotr, struct ui_file * stream);
 515
 516 /* Display the host ADDR on STREAM formatted as ``0x%x''. */
 517 extern void gdb_print_host_address (const void *addr, struct ui_file *stream);
 518
 519 /* Convert a CORE_ADDR into a HEX string.  paddr() is like %08lx.
 520    paddr_nz() is like %lx.  paddr_u() is like %lu. paddr_width() is
 521    for ``%*''. */
 522 extern int strlen_paddr (void);
 523 extern char *paddr (CORE_ADDR addr);
 524 extern char *paddr_nz (CORE_ADDR addr);
 525 extern char *paddr_u (CORE_ADDR addr);
 526 extern char *paddr_d (LONGEST addr);
 527
 528 extern char *phex (ULONGEST l, int sizeof_l);
 529 extern char *phex_nz (ULONGEST l, int sizeof_l);
 530
 531 /* Like paddr() only print/scan raw CORE_ADDR.  The output from
 532    core_addr_to_string() can be passed direct to
 533    string_to_core_addr().  */
 534 extern const char *core_addr_to_string (const CORE_ADDR addr);
 535 extern const char *core_addr_to_string_nz (const CORE_ADDR addr);
 536 extern CORE_ADDR string_to_core_addr (const char *my_string);
 537
 538 extern void fprintf_symbol_filtered (struct ui_file *, char *,
 539                                      enum language, int);
 540
 541 extern NORETURN void perror_with_name (const char *) ATTR_NORETURN;
 542
 543 extern void print_sys_errmsg (const char *, int);
 544
 545 /* From regex.c or libc.  BSD 4.4 declares this with the argument type as
 546    "const char *" in unistd.h, so we can't declare the argument
 547    as "char *".  */
 548
 549 extern char *re_comp (const char *);
 550
 551 /* From symfile.c */
 552
 553 extern void symbol_file_command (char *, int);
 554
 555 /* Remote targets may wish to use this as their load function.  */
 556 extern void generic_load (char *name, int from_tty);
 557
 558 /* Summarise a download */
 559 extern void print_transfer_performance (struct ui_file *stream,
 560                                         unsigned long data_count,
 561                                         unsigned long write_count,
 562                                         unsigned long time_count);
 563
 564 /* From top.c */
 565
 566 typedef void initialize_file_ftype (void);
 567
 568 extern char *skip_quoted (char *);
 569
 570 extern char *gdb_readline (char *);
 571
 572 extern char *gdb_readline_wrapper (char *);
 573
 574 extern char *command_line_input (char *, int, char *);
 575
 576 extern void print_prompt (void);
 577
 578 extern int input_from_terminal_p (void);
 579
 580 extern int info_verbose;
 581
 582 /* From printcmd.c */
 583
 584 extern void set_next_address (CORE_ADDR);
 585
 586 extern void print_address_symbolic (CORE_ADDR, struct ui_file *, int,
 587                                     char *);
 588
 589 extern int build_address_symbolic (CORE_ADDR addr,
 590                                    int do_demangle,
 591                                    char **name,
 592                                    int *offset,
 593                                    char **filename,
 594                                    int *line,
 595                                    int *unmapped);
 596
 597 extern void print_address_numeric (CORE_ADDR, int, struct ui_file *);
 598
 599 extern void print_address (CORE_ADDR, struct ui_file *);
 600
 601 /* From source.c */
 602
 603 extern int openp (const char *, int, const char *, int, int, char **);
 604
 605 extern int source_full_path_of (char *, char **);
 606
 607 extern void mod_path (char *, char **);
 608
 609 extern void add_path (char *, char **, int);
 610
 611 extern void directory_command (char *, int);
 612
 613 extern char *source_path;
 614
 615 extern void init_source_path (void);
 616
 617 extern void init_last_source_visited (void);
 618
 619 extern char *symtab_to_filename (struct symtab *);
 620
 621 /* From exec.c */
 622
 623 extern void exec_set_section_offsets (bfd_signed_vma text_off,
 624                                       bfd_signed_vma data_off,
 625                                       bfd_signed_vma bss_off);
 626
 627 /* Take over the 'find_mapped_memory' vector from exec.c. */
 628 extern void exec_set_find_memory_regions (int (*) (int (*) (CORE_ADDR,
 629                                                             unsigned long,
 630                                                             int, int, int,
 631                                                             void *),
 632                                                    void *));
 633
 634 /* Possible lvalue types.  Like enum language, this should be in
 635    value.h, but needs to be here for the same reason. */
 636
 637 enum lval_type
 638   {
 639     /* Not an lval. */
 640     not_lval,
 641     /* In memory.  Could be a saved register.  */
 642     lval_memory,
 643     /* In a register.  */
 644     lval_register,
 645     /* In a gdb internal variable.  */
 646     lval_internalvar,
 647     /* Part of a gdb internal variable (structure field).  */
 648     lval_internalvar_component,
 649     /* In a register series in a frame not the current one, which may have been
 650        partially saved or saved in different places (otherwise would be
 651        lval_register or lval_memory).  */
 652     lval_reg_frame_relative
 653   };
 654
 655 /* Control types for commands */
 656
 657 enum misc_command_type
 658   {
 659     ok_command,
 660     end_command,
 661     else_command,
 662     nop_command
 663   };
 664
 665 enum command_control_type
 666   {
 667     simple_control,
 668     break_control,
 669     continue_control,
 670     while_control,
 671     if_control,
 672     invalid_control
 673   };
 674
 675 /* Structure for saved commands lines
 676    (for breakpoints, defined commands, etc).  */
 677
 678 struct command_line
 679   {
 680     struct command_line *next;
 681     char *line;
 682     enum command_control_type control_type;
 683     int body_count;
 684     struct command_line **body_list;
 685   };
 686
 687 extern struct command_line *read_command_lines (char *, int);
 688
 689 extern void free_command_lines (struct command_line **);
 690
 691 /* To continue the execution commands when running gdb asynchronously.
 692    A continuation structure contains a pointer to a function to be called
 693    to finish the command, once the target has stopped. Such mechanism is
 694    used bt the finish and until commands, and in the remote protocol
 695    when opening an extended-remote connection. */
 696
 697 struct continuation_arg
 698   {
 699     struct continuation_arg *next;
 700     union continuation_data {
 701       void *pointer;
 702       int   integer;
 703       long  longint;
 704     } data;
 705   };
 706
 707 struct continuation
 708   {
 709     void (*continuation_hook) (struct continuation_arg *);
 710     struct continuation_arg *arg_list;
 711     struct continuation *next;
 712   };
 713
 714 /* In infrun.c. */
 715 extern struct continuation *cmd_continuation;
 716 /* Used only by the step_1 function. */
 717 extern struct continuation *intermediate_continuation;
 718
 719 /* From utils.c */
 720 extern void add_continuation (void (*)(struct continuation_arg *),
 721                               struct continuation_arg *);
 722 extern void do_all_continuations (void);
 723 extern void discard_all_continuations (void);
 724
 725 extern void add_intermediate_continuation (void (*)(struct continuation_arg *),
 726                               struct continuation_arg *);
 727 extern void do_all_intermediate_continuations (void);
 728 extern void discard_all_intermediate_continuations (void);
 729
 730 /* String containing the current directory (what getwd would return).  */
 731
 732 extern char *current_directory;
 733
 734 /* Default radixes for input and output.  Only some values supported.  */
 735 extern unsigned input_radix;
 736 extern unsigned output_radix;
 737
 738 /* Possibilities for prettyprint parameters to routines which print
 739    things.  Like enum language, this should be in value.h, but needs
 740    to be here for the same reason.  FIXME:  If we can eliminate this
 741    as an arg to LA_VAL_PRINT, then we can probably move it back to
 742    value.h. */
 743
 744 enum val_prettyprint
 745   {
 746     Val_no_prettyprint = 0,
 747     Val_prettyprint,
 748     /* Use the default setting which the user has specified.  */
 749     Val_pretty_default
 750   };
 751
 752 /* The ptid struct is a collection of the various "ids" necessary
 753    for identifying the inferior.  This consists of the process id
 754    (pid), thread id (tid), and other fields necessary for uniquely
 755    identifying the inferior process/thread being debugged.  When
 756    manipulating ptids, the constructors, accessors, and predicate
 757    declared in inferior.h should be used.  These are as follows:
 758
 759       ptid_build        - Make a new ptid from a pid, lwp, and tid.
 760       pid_to_ptid       - Make a new ptid from just a pid.
 761       ptid_get_pid      - Fetch the pid component of a ptid.
 762       ptid_get_lwp      - Fetch the lwp component of a ptid.
 763       ptid_get_tid      - Fetch the tid component of a ptid.
 764       ptid_equal        - Test to see if two ptids are equal.
 765
 766    Please do NOT access the struct ptid members directly (except, of
 767    course, in the implementation of the above ptid manipulation
 768    functions).  */
 769
 770 struct ptid
 771   {
 772     /* Process id */
 773     int pid;
 774
 775     /* Lightweight process id */
 776     long lwp;
 777
 778     /* Thread id */
 779     long tid;
 780   };
 781
 782 typedef struct ptid ptid_t;
 783
 784 \f
 785
 786 /* Optional host machine definition.  Pure autoconf targets will not
 787    need a "xm.h" file.  This will be a symlink to one of the xm-*.h
 788    files, built by the `configure' script.  */
 789
 790 #ifdef GDB_XM_FILE
 791 #include "xm.h"
 792 #endif
 793
 794 /* Optional native machine support.  Non-native (and possibly pure
 795    multi-arch) targets do not need a "nm.h" file.  This will be a
 796    symlink to one of the nm-*.h files, built by the `configure'
 797    script.  */
 798
 799 #ifdef GDB_NM_FILE
 800 #include "nm.h"
 801 #endif
 802
 803 /* Optional target machine definition.  Pure multi-arch configurations
 804    do not need a "tm.h" file.  This will be a symlink to one of the
 805    tm-*.h files, built by the `configure' script.  */
 806
 807 #ifdef GDB_TM_FILE
 808 #include "tm.h"
 809 #endif
 810
 811 /* If the xm.h file did not define the mode string used to open the
 812    files, assume that binary files are opened the same way as text
 813    files */
 814 #ifndef FOPEN_RB
 815 #include "fopen-same.h"
 816 #endif
 817
 818 /* Defaults for system-wide constants (if not defined by xm.h, we fake it).
 819    FIXME: Assumes 2's complement arithmetic */
 820
 821 #if !defined (UINT_MAX)
 822 #define UINT_MAX ((unsigned int)(~0))   /* 0xFFFFFFFF for 32-bits */
 823 #endif
 824
 825 #if !defined (INT_MAX)
 826 #define INT_MAX ((int)(UINT_MAX >> 1))  /* 0x7FFFFFFF for 32-bits */
 827 #endif
 828
 829 #if !defined (INT_MIN)
 830 #define INT_MIN ((int)((int) ~0 ^ INT_MAX))     /* 0x80000000 for 32-bits */
 831 #endif
 832
 833 #if !defined (ULONG_MAX)
 834 #define ULONG_MAX ((unsigned long)(~0L))        /* 0xFFFFFFFF for 32-bits */
 835 #endif
 836
 837 #if !defined (LONG_MAX)
 838 #define LONG_MAX ((long)(ULONG_MAX >> 1))       /* 0x7FFFFFFF for 32-bits */
 839 #endif
 840
 841 #if !defined (ULONGEST_MAX)
 842 #define ULONGEST_MAX (~(ULONGEST)0)        /* 0xFFFFFFFFFFFFFFFF for 64-bits */
 843 #endif
 844
 845 #if !defined (LONGEST_MAX)                 /* 0x7FFFFFFFFFFFFFFF for 64-bits */
 846 #define LONGEST_MAX ((LONGEST)(ULONGEST_MAX >> 1))
 847 #endif
 848
 849 /* Convert a LONGEST to an int.  This is used in contexts (e.g. number of
 850    arguments to a function, number in a value history, register number, etc.)
 851    where the value must not be larger than can fit in an int.  */
 852
 853 extern int longest_to_int (LONGEST);
 854
 855 /* Assorted functions we can declare, now that const and volatile are
 856    defined.  */
 857
 858 extern char *savestring (const char *, size_t);
 859
 860 extern char *msavestring (void *, const char *, size_t);
 861
 862 extern char *mstrsave (void *, const char *);
 863
 864 /* Robust versions of same.  Throw an internal error when no memory,
 865    guard against stray NULL arguments. */
 866 extern void *xmmalloc (void *md, size_t size);
 867 extern void *xmrealloc (void *md, void *ptr, size_t size);
 868 extern void *xmcalloc (void *md, size_t number, size_t size);
 869 extern void xmfree (void *md, void *ptr);
 870
 871 /* xmalloc(), xrealloc() and xcalloc() have already been declared in
 872    "libiberty.h". */
 873 extern void xfree (void *);
 874
 875 /* Utility macros to allocate typed memory.  Avoids errors like:
 876    struct foo *foo = xmalloc (sizeof struct bar); and memset (foo,
 877    sizeof (struct foo), 0).  */
 878 #define XZALLOC(TYPE) ((TYPE*) memset (xmalloc (sizeof (TYPE)), 0, sizeof (TYPE)))
 879 #define XMALLOC(TYPE) ((TYPE*) xmalloc (sizeof (TYPE)))
 880 #define XCALLOC(NMEMB, TYPE) ((TYPE*) xcalloc ((NMEMB), sizeof (TYPE)))
 881
 882 /* Like asprintf/vasprintf but get an internal_error if the call
 883    fails. */
 884 extern void xasprintf (char **ret, const char *format, ...) ATTR_FORMAT (printf, 2, 3);
 885 extern void xvasprintf (char **ret, const char *format, va_list ap);
 886
 887 /* Like asprintf, but return the string, throw an error if no memory.  */
 888 extern char *xstrprintf (const char *format, ...) ATTR_FORMAT (printf, 1, 2);
 889
 890 extern int parse_escape (char **);
 891
 892 /* Message to be printed before the error message, when an error occurs.  */
 893
 894 extern char *error_pre_print;
 895
 896 /* Message to be printed before the error message, when an error occurs.  */
 897
 898 extern char *quit_pre_print;
 899
 900 /* Message to be printed before the warning message, when a warning occurs.  */
 901
 902 extern char *warning_pre_print;
 903
 904 extern NORETURN void verror (const char *fmt, va_list ap) ATTR_NORETURN;
 905
 906 extern NORETURN void error (const char *fmt, ...) ATTR_NORETURN ATTR_FORMAT (printf, 1, 2);
 907
 908 extern NORETURN void error_silent (const char *fmt, ...) ATTR_NORETURN ATTR_FORMAT (printf, 1, 2);
 909
 910 extern NORETURN void error_stream (struct ui_file *) ATTR_NORETURN;
 911
 912 /* Initialize the error buffer.  */
 913 extern void error_init (void);
 914
 915 /* Returns a freshly allocate buffer containing the last error
 916    message.  */
 917 extern char *error_last_message (void);
 918
 919 /* Output arbitrary error message.  */
 920 extern void error_output_message (char *pre_print, char *msg);
 921
 922 extern NORETURN void internal_verror (const char *file, int line,
 923                                       const char *, va_list ap) ATTR_NORETURN;
 924
 925 extern NORETURN void internal_error (const char *file, int line,
 926                                      const char *, ...) ATTR_NORETURN ATTR_FORMAT (printf, 3, 4);
 927
 928 extern void internal_vwarning (const char *file, int line,
 929                                const char *, va_list ap);
 930
 931 extern void internal_warning (const char *file, int line,
 932                               const char *, ...) ATTR_FORMAT (printf, 3, 4);
 933
 934 extern NORETURN void nomem (long) ATTR_NORETURN;
 935
 936 /* Reasons for calling throw_exception().  NOTE: all reason values
 937    must be less than zero.  enum value 0 is reserved for internal use
 938    as the return value from an initial setjmp().  The function
 939    catch_exceptions() reserves values >= 0 as legal results from its
 940    wrapped function.  */
 941
 942 enum return_reason
 943   {
 944     /* User interrupt.  */
 945     RETURN_QUIT = -2,
 946     /* Any other error.  */
 947     RETURN_ERROR
 948   };
 949
 950 #define ALL_CLEANUPS    ((struct cleanup *)0)
 951
 952 #define RETURN_MASK(reason)     (1 << (int)(-reason))
 953 #define RETURN_MASK_QUIT        RETURN_MASK (RETURN_QUIT)
 954 #define RETURN_MASK_ERROR       RETURN_MASK (RETURN_ERROR)
 955 #define RETURN_MASK_ALL         (RETURN_MASK_QUIT | RETURN_MASK_ERROR)
 956 typedef int return_mask;
 957
 958 /* Throw an exception of type RETURN_REASON.  Will execute a LONG JUMP
 959    to the inner most containing exception handler established using
 960    catch_exceptions() (or the legacy catch_errors()).
 961
 962    Code normally throws an exception using error() et.al.  For various
 963    reaons, GDB also contains code that throws an exception directly.
 964    For instance, the remote*.c targets contain CNTRL-C signal handlers
 965    that propogate the QUIT event up the exception chain.  ``This could
 966    be a good thing or a dangerous thing.'' -- the Existential Wombat.  */
 967
 968 extern NORETURN void throw_exception (enum return_reason) ATTR_NORETURN;
 969
 970 /* Call FUNC(UIOUT, FUNC_ARGS) but wrapped within an exception
 971    handler.  If an exception (enum return_reason) is thrown using
 972    throw_exception() than all cleanups installed since
 973    catch_exceptions() was entered are invoked, the (-ve) exception
 974    value is then returned by catch_exceptions.  If FUNC() returns
 975    normally (with a postive or zero return value) then that value is
 976    returned by catch_exceptions().  It is an internal_error() for
 977    FUNC() to return a negative value.
 978
 979    For the period of the FUNC() call: UIOUT is installed as the output
 980    builder; ERRSTRING is installed as the error/quit message; and a
 981    new cleanup_chain is established.  The old values are restored
 982    before catch_exceptions() returns.
 983
 984    The variant catch_exceptions_with_msg() is the same as
 985    catch_exceptions() but adds the ability to return an allocated
 986    copy of the gdb error message.  This is used when a silent error is
 987    issued and the caller wants to manually issue the error message.
 988
 989    FIXME; cagney/2001-08-13: The need to override the global UIOUT
 990    builder variable should just go away.
 991
 992    This function superseeds catch_errors().
 993
 994    This function uses SETJMP() and LONGJUMP().  */
 995
 996 struct ui_out;
 997 typedef int (catch_exceptions_ftype) (struct ui_out *ui_out, void *args);
 998 extern int catch_exceptions (struct ui_out *uiout,
 999                              catch_exceptions_ftype *func, void *func_args,
1000                              char *errstring, return_mask mask);
1001 extern int catch_exceptions_with_msg (struct ui_out *uiout,
1002                                       catch_exceptions_ftype *func,
1003                                       void *func_args,
1004                                       char *errstring, char **gdberrmsg,
1005                                       return_mask mask);
1006
1007 /* If CATCH_ERRORS_FTYPE throws an error, catch_errors() returns zero
1008    otherwize the result from CATCH_ERRORS_FTYPE is returned. It is
1009    probably useful for CATCH_ERRORS_FTYPE to always return a non-zero
1010    value. It's unfortunate that, catch_errors() does not return an
1011    indication of the exact exception that it caught - quit_flag might
1012    help.
1013
1014    This function is superseeded by catch_exceptions().  */
1015
1016 typedef int (catch_errors_ftype) (void *);
1017 extern int catch_errors (catch_errors_ftype *, void *, char *, return_mask);
1018
1019 /* Template to catch_errors() that wraps calls to command
1020    functions. */
1021
1022 typedef void (catch_command_errors_ftype) (char *, int);
1023 extern int catch_command_errors (catch_command_errors_ftype *func, char *command, int from_tty, return_mask);
1024
1025 extern void warning (const char *, ...) ATTR_FORMAT (printf, 1, 2);
1026
1027 extern void vwarning (const char *, va_list args);
1028
1029 /* List of known OS ABIs.  If you change this, make sure to update the
1030    table in osabi.c.  */
1031 enum gdb_osabi
1032 {
1033   GDB_OSABI_UNINITIALIZED = -1, /* For struct gdbarch_info.  */
1034
1035   GDB_OSABI_UNKNOWN = 0,        /* keep this zero */
1036
1037   GDB_OSABI_SVR4,
1038   GDB_OSABI_HURD,
1039   GDB_OSABI_SOLARIS,
1040   GDB_OSABI_OSF1,
1041   GDB_OSABI_LINUX,
1042   GDB_OSABI_FREEBSD_AOUT,
1043   GDB_OSABI_FREEBSD_ELF,
1044   GDB_OSABI_NETBSD_AOUT,
1045   GDB_OSABI_NETBSD_ELF,
1046   GDB_OSABI_OPENBSD_ELF,
1047   GDB_OSABI_WINCE,
1048   GDB_OSABI_GO32,
1049   GDB_OSABI_NETWARE,
1050   GDB_OSABI_IRIX,
1051   GDB_OSABI_LYNXOS,
1052   GDB_OSABI_INTERIX,
1053   GDB_OSABI_HPUX_ELF,
1054   GDB_OSABI_HPUX_SOM,
1055
1056   GDB_OSABI_ARM_EABI_V1,
1057   GDB_OSABI_ARM_EABI_V2,
1058   GDB_OSABI_ARM_APCS,
1059   GDB_OSABI_QNXNTO,
1060
1061   GDB_OSABI_CYGWIN,
1062
1063   GDB_OSABI_INVALID             /* keep this last */
1064 };
1065
1066 /* Global functions from other, non-gdb GNU thingies.
1067    Libiberty thingies are no longer declared here.  We include libiberty.h
1068    above, instead.  */
1069
1070 #ifndef GETENV_PROVIDED
1071 extern char *getenv (const char *);
1072 #endif
1073
1074 /* From other system libraries */
1075
1076 #ifdef HAVE_STDDEF_H
1077 #include <stddef.h>
1078 #endif
1079
1080 #ifdef HAVE_STDLIB_H
1081 #include <stdlib.h>
1082 #endif
1083 #ifndef min
1084 #define min(a, b) ((a) < (b) ? (a) : (b))
1085 #endif
1086 #ifndef max
1087 #define max(a, b) ((a) > (b) ? (a) : (b))
1088 #endif
1089
1090
1091 /* We take the address of fclose later, but some stdio's forget
1092    to declare this.  We can't always declare it since there's
1093    no way to declare the parameters without upsetting some compiler
1094    somewhere. */
1095
1096 #ifndef FCLOSE_PROVIDED
1097 extern int fclose (FILE *);
1098 #endif
1099
1100 #ifndef atof
1101 extern double atof (const char *);      /* X3.159-1989  4.10.1.1 */
1102 #endif
1103
1104 /* Various possibilities for alloca.  */
1105 #ifndef alloca
1106 #ifdef __GNUC__
1107 #define alloca __builtin_alloca
1108 #else /* Not GNU C */
1109 #ifdef HAVE_ALLOCA_H
1110 #include <alloca.h>
1111 #else
1112 #ifdef _AIX
1113 #pragma alloca
1114 #else
1115
1116 /* We need to be careful not to declare this in a way which conflicts with
1117    bison.  Bison never declares it as char *, but under various circumstances
1118    (like __hpux) we need to use void *.  */
1119 extern void *alloca ();
1120 #endif /* Not _AIX */
1121 #endif /* Not HAVE_ALLOCA_H */
1122 #endif /* Not GNU C */
1123 #endif /* alloca not defined */
1124
1125 /* Is GDB multi-arch?  If there's a "tm.h" file, it is not.  */
1126 #ifndef GDB_MULTI_ARCH
1127 #ifdef GDB_TM_FILE
1128 #define GDB_MULTI_ARCH GDB_MULTI_ARCH_PARTIAL
1129 #else
1130 #define GDB_MULTI_ARCH GDB_MULTI_ARCH_PURE
1131 #endif
1132 #endif
1133
1134 /* Dynamic target-system-dependent parameters for GDB. */
1135 #include "gdbarch.h"
1136
1137 /* Maximum size of a register.  Something small, but large enough for
1138    all known ISAs.  If it turns out to be too small, make it bigger.  */
1139
1140 enum { MAX_REGISTER_SIZE = 16 };
1141
1142 /* Static target-system-dependent parameters for GDB. */
1143
1144 /* Number of bits in a char or unsigned char for the target machine.
1145    Just like CHAR_BIT in <limits.h> but describes the target machine.  */
1146 #if !defined (TARGET_CHAR_BIT)
1147 #define TARGET_CHAR_BIT 8
1148 #endif
1149
1150 /* If we picked up a copy of CHAR_BIT from a configuration file
1151    (which may get it by including <limits.h>) then use it to set
1152    the number of bits in a host char.  If not, use the same size
1153    as the target. */
1154
1155 #if defined (CHAR_BIT)
1156 #define HOST_CHAR_BIT CHAR_BIT
1157 #else
1158 #define HOST_CHAR_BIT TARGET_CHAR_BIT
1159 #endif
1160
1161 /* The bit byte-order has to do just with numbering of bits in
1162    debugging symbols and such.  Conceptually, it's quite separate
1163    from byte/word byte order.  */
1164
1165 #if !defined (BITS_BIG_ENDIAN)
1166 #define BITS_BIG_ENDIAN (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG)
1167 #endif
1168
1169 /* In findvar.c.  */
1170
1171 extern LONGEST extract_signed_integer (const void *, int);
1172
1173 extern ULONGEST extract_unsigned_integer (const void *, int);
1174
1175 extern int extract_long_unsigned_integer (const void *, int, LONGEST *);
1176
1177 extern CORE_ADDR extract_typed_address (const void *buf, struct type *type);
1178
1179 extern void store_signed_integer (void *, int, LONGEST);
1180
1181 extern void store_unsigned_integer (void *, int, ULONGEST);
1182
1183 extern void store_typed_address (void *buf, struct type *type, CORE_ADDR addr);
1184
1185 \f
1186 /* From valops.c */
1187
1188 extern CORE_ADDR push_bytes (CORE_ADDR, char *, int);
1189
1190 extern CORE_ADDR push_word (CORE_ADDR, ULONGEST);
1191
1192 extern int watchdog;
1193
1194 /* Hooks for alternate command interfaces.  */
1195
1196 /* The name of the interpreter if specified on the command line. */
1197 extern char *interpreter_p;
1198
1199 /* If a given interpreter matches INTERPRETER_P then it should update
1200    command_loop_hook and init_ui_hook with the per-interpreter
1201    implementation. */
1202 /* FIXME: command_loop_hook and init_ui_hook should be moved here. */
1203
1204 struct target_waitstatus;
1205 struct cmd_list_element;
1206
1207 /* Should the asynchronous variant of the interpreter (using the
1208    event-loop) be enabled? */
1209 extern int event_loop_p;
1210
1211 extern void (*init_ui_hook) (char *argv0);
1212 extern void (*command_loop_hook) (void);
1213 extern void (*show_load_progress) (const char *section,
1214                                    unsigned long section_sent,
1215                                    unsigned long section_size,
1216                                    unsigned long total_sent,
1217                                    unsigned long total_size);
1218 extern void (*print_frame_info_listing_hook) (struct symtab * s,
1219                                               int line, int stopline,
1220                                               int noerror);
1221 extern struct frame_info *parse_frame_specification (char *frame_exp);
1222 extern int (*query_hook) (const char *, va_list);
1223 extern void (*warning_hook) (const char *, va_list);
1224 extern void (*flush_hook) (struct ui_file * stream);
1225 extern void (*create_breakpoint_hook) (struct breakpoint * b);
1226 extern void (*delete_breakpoint_hook) (struct breakpoint * bpt);
1227 extern void (*modify_breakpoint_hook) (struct breakpoint * bpt);
1228 extern void (*interactive_hook) (void);
1229 extern void (*registers_changed_hook) (void);
1230 extern void (*readline_begin_hook) (char *,...);
1231 extern char *(*readline_hook) (char *);
1232 extern void (*readline_end_hook) (void);
1233 extern void (*register_changed_hook) (int regno);
1234 extern void (*memory_changed_hook) (CORE_ADDR addr, int len);
1235 extern void (*context_hook) (int);
1236 extern ptid_t (*target_wait_hook) (ptid_t ptid,
1237                                          struct target_waitstatus * status);
1238
1239 extern void (*attach_hook) (void);
1240 extern void (*detach_hook) (void);
1241 extern void (*call_command_hook) (struct cmd_list_element * c,
1242                                   char *cmd, int from_tty);
1243
1244 extern void (*set_hook) (struct cmd_list_element * c);
1245
1246 extern NORETURN void (*error_hook) (void) ATTR_NORETURN;
1247
1248 extern void (*error_begin_hook) (void);
1249
1250 extern int (*ui_load_progress_hook) (const char *section, 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 */