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 /* An address in the program being debugged.  Host byte order.  Rather
  70    than duplicate all the logic in BFD which figures out what type
  71    this is (long, long long, etc.) and whether it needs to be 64
  72    bits (the host/target interactions are subtle), we just use
  73    bfd_vma.  */
  74
  75 typedef bfd_vma CORE_ADDR;
  76
  77 /* This is to make sure that LONGEST is at least as big as CORE_ADDR.  */
  78
  79 #ifndef LONGEST
  80
  81 #ifdef BFD64
  82
  83 #define LONGEST BFD_HOST_64_BIT
  84 #define ULONGEST BFD_HOST_U_64_BIT
  85
  86 #else /* No BFD64 */
  87
  88 #ifdef CC_HAS_LONG_LONG
  89 #define LONGEST long long
  90 #define ULONGEST unsigned long long
  91 #else
  92 #ifdef BFD_HOST_64_BIT
  93 /* BFD_HOST_64_BIT is defined for some hosts that don't have long long
  94    (e.g. i386-windows) so try it.  */
  95 #define LONGEST BFD_HOST_64_BIT
  96 #define ULONGEST BFD_HOST_U_64_BIT
  97 #else
  98 #define LONGEST long
  99 #define ULONGEST unsigned long
 100 #endif
 101 #endif
 102
 103 #endif /* No BFD64 */
 104
 105 #endif /* ! LONGEST */
 106
 107 #ifndef min
 108 #define min(a, b) ((a) < (b) ? (a) : (b))
 109 #endif
 110 #ifndef max
 111 #define max(a, b) ((a) > (b) ? (a) : (b))
 112 #endif
 113
 114 /* Macros to do string compares.
 115
 116    NOTE: cagney/2000-03-14:
 117
 118    While old code can continue to refer to these macros, new code is
 119    probably better off using strcmp() directly vis: ``strcmp() == 0''
 120    and ``strcmp() != 0''.
 121
 122    This is because modern compilers can directly inline strcmp()
 123    making the original justification for these macros - avoid function
 124    call overhead by pre-testing the first characters
 125    (``*X==*Y?...:0'') - redundant.
 126
 127    ``Even if [...] testing the first character does have a modest
 128    performance improvement, I'd rather that whenever a performance
 129    issue is found that we spend the effort on algorithmic
 130    optimizations than micro-optimizing.'' J.T. */
 131
 132 /* NOTE: cagney/2003-11-23: All instances of STREQ[N] covered by
 133    testing GDB on a stabs system have been replaced by equivalent
 134    str[n]cmp calls.  To avoid the possability of introducing bugs when
 135    making untested changes, the remaining references were deprecated
 136    rather than replaced.  */
 137
 138 /* DISCLAIMER: cagney/2003-11-23: Simplified definition of these
 139    macros so that they just map directly onto strcmp equivalent.  I'm
 140    not responsible for any breakage due to code that relied on the old
 141    underlying implementation.  */
 142
 143 #define DEPRECATED_STREQ(a,b) (strcmp ((a), (b)) == 0)
 144 #define DEPRECATED_STREQN(a,b,c) (strncmp ((a), (b), (c)) == 0)
 145
 146 /* Check if a character is one of the commonly used C++ marker characters.  */
 147 extern int is_cplus_marker (int);
 148
 149 /* enable xdb commands if set */
 150 extern int xdb_commands;
 151
 152 /* enable dbx commands if set */
 153 extern int dbx_commands;
 154
 155 /* System root path, used to find libraries etc.  */
 156 extern char *gdb_sysroot;
 157
 158 extern int quit_flag;
 159 extern int immediate_quit;
 160 extern int sevenbit_strings;
 161
 162 extern void quit (void);
 163
 164 /* FIXME: cagney/2000-03-13: It has been suggested that the peformance
 165    benefits of having a ``QUIT'' macro rather than a function are
 166    marginal.  If the overhead of a QUIT function call is proving
 167    significant then its calling frequency should probably be reduced
 168    [kingdon].  A profile analyzing the current situtation is
 169    needed. */
 170
 171 #ifdef QUIT
 172 /* do twice to force compiler warning */
 173 #define QUIT_FIXME "FIXME"
 174 #define QUIT_FIXME "ignoring redefinition of QUIT"
 175 #else
 176 #define QUIT { \
 177   if (quit_flag) quit (); \
 178   if (deprecated_interactive_hook) deprecated_interactive_hook (); \
 179 }
 180 #endif
 181
 182 /* Languages represented in the symbol table and elsewhere.
 183    This should probably be in language.h, but since enum's can't
 184    be forward declared to satisfy opaque references before their
 185    actual definition, needs to be here. */
 186
 187 enum language
 188   {
 189     language_unknown,           /* Language not known */
 190     language_auto,              /* Placeholder for automatic setting */
 191     language_c,                 /* C */
 192     language_cplus,             /* C++ */
 193     language_objc,              /* Objective-C */
 194     language_java,              /* Java */
 195     language_fortran,           /* Fortran */
 196     language_m2,                /* Modula-2 */
 197     language_asm,               /* Assembly language */
 198     language_scm,               /* Scheme / Guile */
 199     language_pascal,            /* Pascal */
 200     language_ada,               /* Ada */
 201     language_minimal,           /* All other languages, minimal support only */
 202     nr_languages
 203   };
 204
 205 enum precision_type
 206   {
 207     single_precision,
 208     double_precision,
 209     unspecified_precision
 210   };
 211
 212 /* A generic, not quite boolean, enumeration.  */
 213 enum auto_boolean
 214 {
 215   AUTO_BOOLEAN_TRUE,
 216   AUTO_BOOLEAN_FALSE,
 217   AUTO_BOOLEAN_AUTO
 218 };
 219
 220 /* Potential ways that a function can return a value of a given type.  */
 221 enum return_value_convention
 222 {
 223   /* Where the return value has been squeezed into one or more
 224      registers.  */
 225   RETURN_VALUE_REGISTER_CONVENTION,
 226   /* Commonly known as the "struct return convention".  The caller
 227      passes an additional hidden first parameter to the caller.  That
 228      parameter contains the address at which the value being returned
 229      should be stored.  While typically, and historically, used for
 230      large structs, this is convention is applied to values of many
 231      different types.  */
 232   RETURN_VALUE_STRUCT_CONVENTION,
 233   /* Like the "struct return convention" above, but where the ABI
 234      guarantees that the called function stores the address at which
 235      the value being returned is stored in a well-defined location,
 236      such as a register or memory slot in the stack frame.  Don't use
 237      this if the ABI doesn't explicitly guarantees this.  */
 238   RETURN_VALUE_ABI_RETURNS_ADDRESS,
 239   /* Like the "struct return convention" above, but where the ABI
 240      guarantees that the address at which the value being returned is
 241      stored will be available in a well-defined location, such as a
 242      register or memory slot in the stack frame.  Don't use this if
 243      the ABI doesn't explicitly guarantees this.  */
 244   RETURN_VALUE_ABI_PRESERVES_ADDRESS,
 245 };
 246
 247 /* the cleanup list records things that have to be undone
 248    if an error happens (descriptors to be closed, memory to be freed, etc.)
 249    Each link in the chain records a function to call and an
 250    argument to give it.
 251
 252    Use make_cleanup to add an element to the cleanup chain.
 253    Use do_cleanups to do all cleanup actions back to a given
 254    point in the chain.  Use discard_cleanups to remove cleanups
 255    from the chain back to a given point, not doing them.  */
 256
 257 struct cleanup
 258   {
 259     struct cleanup *next;
 260     void (*function) (void *);
 261     void *arg;
 262   };
 263
 264
 265 /* The ability to declare that a function never returns is useful, but
 266    not really required to compile GDB successfully, so the NORETURN and
 267    ATTR_NORETURN macros normally expand into nothing.  */
 268
 269 /* If compiling with older versions of GCC, a function may be declared
 270    "volatile" to indicate that it does not return.  */
 271
 272 #ifndef NORETURN
 273 #if defined(__GNUC__) \
 274      && (__GNUC__ == 1 || (__GNUC__ == 2 && __GNUC_MINOR__ < 7))
 275 #define NORETURN volatile
 276 #else
 277 #define NORETURN                /* nothing */
 278 #endif
 279 #endif
 280
 281 /* GCC 2.5 and later versions define a function attribute "noreturn",
 282    which is the preferred way to declare that a function never returns.
 283    However GCC 2.7 appears to be the first version in which this fully
 284    works everywhere we use it. */
 285
 286 #ifndef ATTR_NORETURN
 287 #if defined(__GNUC__) && (__GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 7))
 288 #define ATTR_NORETURN __attribute__ ((noreturn))
 289 #else
 290 #define ATTR_NORETURN           /* nothing */
 291 #endif
 292 #endif
 293
 294 #ifndef ATTR_FORMAT
 295 #if defined(__GNUC__) && (__GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 4))
 296 #define ATTR_FORMAT(type, x, y) __attribute__ ((format(type, x, y)))
 297 #else
 298 #define ATTR_FORMAT(type, x, y) /* nothing */
 299 #endif
 300 #endif
 301
 302 /* Be conservative and use enum bitfields only with GCC.
 303    This is copied from gcc 3.3.1, system.h.  */
 304
 305 #if defined(__GNUC__) && (__GNUC__ >= 2)
 306 #define ENUM_BITFIELD(TYPE) enum TYPE
 307 #else
 308 #define ENUM_BITFIELD(TYPE) unsigned int
 309 #endif
 310
 311 /* Needed for various prototypes */
 312
 313 struct symtab;
 314 struct breakpoint;
 315 struct frame_info;
 316
 317 /* From blockframe.c */
 318
 319 extern int inside_entry_func (struct frame_info *this_frame);
 320
 321 /* From utils.c */
 322
 323 extern void initialize_utils (void);
 324
 325 extern void notice_quit (void);
 326
 327 extern int strcmp_iw (const char *, const char *);
 328
 329 extern int strcmp_iw_ordered (const char *, const char *);
 330
 331 extern int streq (const char *, const char *);
 332
 333 extern int subset_compare (char *, char *);
 334
 335 extern char *safe_strerror (int);
 336
 337 extern void request_quit (int);
 338
 339 extern void do_cleanups (struct cleanup *);
 340 extern void do_final_cleanups (struct cleanup *);
 341 extern void do_run_cleanups (struct cleanup *);
 342 extern void do_exec_cleanups (struct cleanup *);
 343 extern void do_exec_error_cleanups (struct cleanup *);
 344
 345 extern void discard_cleanups (struct cleanup *);
 346 extern void discard_final_cleanups (struct cleanup *);
 347 extern void discard_exec_error_cleanups (struct cleanup *);
 348 extern void discard_my_cleanups (struct cleanup **, struct cleanup *);
 349
 350 /* NOTE: cagney/2000-03-04: This typedef is strictly for the
 351    make_cleanup function declarations below. Do not use this typedef
 352    as a cast when passing functions into the make_cleanup() code.
 353    Instead either use a bounce function or add a wrapper function.
 354    Calling a f(char*) function with f(void*) is non-portable. */
 355 typedef void (make_cleanup_ftype) (void *);
 356
 357 extern struct cleanup *make_cleanup (make_cleanup_ftype *, void *);
 358
 359 extern struct cleanup *make_cleanup_freeargv (char **);
 360
 361 struct ui_file;
 362 extern struct cleanup *make_cleanup_ui_file_delete (struct ui_file *);
 363
 364 struct section_addr_info;
 365 extern struct cleanup *(make_cleanup_free_section_addr_info
 366                         (struct section_addr_info *));
 367
 368 extern struct cleanup *make_cleanup_close (int fd);
 369
 370 extern struct cleanup *make_cleanup_bfd_close (bfd *abfd);
 371
 372 extern struct cleanup *make_final_cleanup (make_cleanup_ftype *, void *);
 373
 374 extern struct cleanup *make_my_cleanup (struct cleanup **,
 375                                         make_cleanup_ftype *, void *);
 376
 377 extern struct cleanup *make_run_cleanup (make_cleanup_ftype *, void *);
 378
 379 extern struct cleanup *make_exec_cleanup (make_cleanup_ftype *, void *);
 380 extern struct cleanup *make_exec_error_cleanup (make_cleanup_ftype *, void *);
 381
 382 extern struct cleanup *save_cleanups (void);
 383 extern struct cleanup *save_final_cleanups (void);
 384 extern struct cleanup *save_my_cleanups (struct cleanup **);
 385
 386 extern void restore_cleanups (struct cleanup *);
 387 extern void restore_final_cleanups (struct cleanup *);
 388 extern void restore_my_cleanups (struct cleanup **, struct cleanup *);
 389
 390 extern void free_current_contents (void *);
 391
 392 extern void null_cleanup (void *);
 393
 394 extern int myread (int, char *, int);
 395
 396 extern int query (const char *, ...) ATTR_FORMAT (printf, 1, 2);
 397 extern int nquery (const char *, ...) ATTR_FORMAT (printf, 1, 2);
 398 extern int yquery (const char *, ...) ATTR_FORMAT (printf, 1, 2);
 399
 400 extern void init_page_info (void);
 401
 402 extern char *gdb_realpath (const char *);
 403 extern char *xfullpath (const char *);
 404
 405 extern unsigned long gnu_debuglink_crc32 (unsigned long crc,
 406                                           unsigned char *buf, size_t len);
 407
 408 /* From demangle.c */
 409
 410 extern void set_demangling_style (char *);
 411
 412 /* From tm.h */
 413
 414 struct type;
 415 typedef int (use_struct_convention_fn) (int gcc_p, struct type * value_type);
 416 extern use_struct_convention_fn generic_use_struct_convention;
 417
 418 \f
 419 /* Annotation stuff.  */
 420
 421 extern int annotation_level;    /* in stack.c */
 422 \f
 423 extern void begin_line (void);
 424
 425 extern void wrap_here (char *);
 426
 427 extern void reinitialize_more_filter (void);
 428
 429 /* Normal results */
 430 extern struct ui_file *gdb_stdout;
 431 /* Input stream */
 432 extern struct ui_file *gdb_stdin;
 433 /* Serious error notifications */
 434 extern struct ui_file *gdb_stderr;
 435 /* Log/debug/trace messages that should bypass normal stdout/stderr
 436    filtering.  For moment, always call this stream using
 437    *_unfiltered. In the very near future that restriction shall be
 438    removed - either call shall be unfiltered. (cagney 1999-06-13). */
 439 extern struct ui_file *gdb_stdlog;
 440 /* Target output that should bypass normal stdout/stderr filtering.
 441    For moment, always call this stream using *_unfiltered. In the
 442    very near future that restriction shall be removed - either call
 443    shall be unfiltered. (cagney 1999-07-02). */
 444 extern struct ui_file *gdb_stdtarg;
 445 extern struct ui_file *gdb_stdtargerr;
 446 extern struct ui_file *gdb_stdtargin;
 447
 448 #include "ui-file.h"
 449
 450 /* More generic printf like operations.  Filtered versions may return
 451    non-locally on error.  */
 452
 453 extern void fputs_filtered (const char *, struct ui_file *);
 454
 455 extern void fputs_unfiltered (const char *, struct ui_file *);
 456
 457 extern int fputc_filtered (int c, struct ui_file *);
 458
 459 extern int fputc_unfiltered (int c, struct ui_file *);
 460
 461 extern int putchar_filtered (int c);
 462
 463 extern int putchar_unfiltered (int c);
 464
 465 extern void puts_filtered (const char *);
 466
 467 extern void puts_unfiltered (const char *);
 468
 469 extern void puts_filtered_tabular (char *string, int width, int right);
 470
 471 extern void puts_debug (char *prefix, char *string, char *suffix);
 472
 473 extern void vprintf_filtered (const char *, va_list) ATTR_FORMAT (printf, 1, 0);
 474
 475 extern void vfprintf_filtered (struct ui_file *, const char *, va_list) ATTR_FORMAT (printf, 2, 0);
 476
 477 extern void fprintf_filtered (struct ui_file *, const char *, ...) ATTR_FORMAT (printf, 2, 3);
 478
 479 extern void fprintfi_filtered (int, struct ui_file *, const char *, ...) ATTR_FORMAT (printf, 3, 4);
 480
 481 extern void printf_filtered (const char *, ...) ATTR_FORMAT (printf, 1, 2);
 482
 483 extern void printfi_filtered (int, const char *, ...) ATTR_FORMAT (printf, 2, 3);
 484
 485 extern void vprintf_unfiltered (const char *, va_list) ATTR_FORMAT (printf, 1, 0);
 486
 487 extern void vfprintf_unfiltered (struct ui_file *, const char *, va_list) ATTR_FORMAT (printf, 2, 0);
 488
 489 extern void fprintf_unfiltered (struct ui_file *, const char *, ...) ATTR_FORMAT (printf, 2, 3);
 490
 491 extern void printf_unfiltered (const char *, ...) ATTR_FORMAT (printf, 1, 2);
 492
 493 extern void print_spaces (int, struct ui_file *);
 494
 495 extern void print_spaces_filtered (int, struct ui_file *);
 496
 497 extern char *n_spaces (int);
 498
 499 extern void fputstr_filtered (const char *str, int quotr, struct ui_file * stream);
 500
 501 extern void fputstr_unfiltered (const char *str, int quotr, struct ui_file * stream);
 502
 503 extern void fputstrn_unfiltered (const char *str, int n, int quotr, struct ui_file * stream);
 504
 505 /* Display the host ADDR on STREAM formatted as ``0x%x''. */
 506 extern void gdb_print_host_address (const void *addr, struct ui_file *stream);
 507
 508 /* Convert a CORE_ADDR into a HEX string.  paddr() is like %08lx.
 509    paddr_nz() is like %lx.  paddr_u() is like %lu. paddr_width() is
 510    for ``%*''. */
 511 extern int strlen_paddr (void);
 512 extern char *paddr (CORE_ADDR addr);
 513 extern char *paddr_nz (CORE_ADDR addr);
 514 extern char *paddr_u (CORE_ADDR addr);
 515 extern char *paddr_d (LONGEST addr);
 516
 517 extern char *phex (ULONGEST l, int sizeof_l);
 518 extern char *phex_nz (ULONGEST l, int sizeof_l);
 519 extern char *int_string (LONGEST, int, int, int, int);
 520
 521 /* Like paddr() only print/scan raw CORE_ADDR.  The output from
 522    core_addr_to_string() can be passed direct to
 523    string_to_core_addr().  */
 524 extern const char *core_addr_to_string (const CORE_ADDR addr);
 525 extern const char *core_addr_to_string_nz (const CORE_ADDR addr);
 526 extern CORE_ADDR string_to_core_addr (const char *my_string);
 527
 528 /* Return a string that contains a number formatted as a hex
 529    string.  */
 530 extern char *hex_string (LONGEST);
 531 extern char *hex_string_custom (LONGEST, int);
 532
 533 extern void fprintf_symbol_filtered (struct ui_file *, char *,
 534                                      enum language, int);
 535
 536 extern NORETURN void perror_with_name (const char *) ATTR_NORETURN;
 537
 538 extern void print_sys_errmsg (const char *, int);
 539
 540 /* From regex.c or libc.  BSD 4.4 declares this with the argument type as
 541    "const char *" in unistd.h, so we can't declare the argument
 542    as "char *".  */
 543
 544 extern char *re_comp (const char *);
 545
 546 /* From symfile.c */
 547
 548 extern void symbol_file_command (char *, int);
 549
 550 /* Remote targets may wish to use this as their load function.  */
 551 extern void generic_load (char *name, int from_tty);
 552
 553 /* Summarise a download */
 554 extern void print_transfer_performance (struct ui_file *stream,
 555                                         unsigned long data_count,
 556                                         unsigned long write_count,
 557                                         unsigned long time_count);
 558
 559 /* From top.c */
 560
 561 typedef void initialize_file_ftype (void);
 562
 563 extern char *skip_quoted (char *);
 564
 565 extern char *gdb_readline (char *);
 566
 567 extern char *gdb_readline_wrapper (char *);
 568
 569 extern char *command_line_input (char *, int, char *);
 570
 571 extern void print_prompt (void);
 572
 573 extern int input_from_terminal_p (void);
 574
 575 extern int info_verbose;
 576
 577 /* From printcmd.c */
 578
 579 extern void set_next_address (CORE_ADDR);
 580
 581 extern void print_address_symbolic (CORE_ADDR, struct ui_file *, int,
 582                                     char *);
 583
 584 extern int build_address_symbolic (CORE_ADDR addr,
 585                                    int do_demangle,
 586                                    char **name,
 587                                    int *offset,
 588                                    char **filename,
 589                                    int *line,
 590                                    int *unmapped);
 591
 592 extern void print_address_numeric (CORE_ADDR, int, struct ui_file *);
 593
 594 extern void print_address (CORE_ADDR, struct ui_file *);
 595
 596 /* From source.c */
 597
 598 #define OPF_TRY_CWD_FIRST     0x01
 599 #define OPF_SEARCH_IN_PATH    0x02
 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 /* From exec.c */
 618
 619 extern void exec_set_section_offsets (bfd_signed_vma text_off,
 620                                       bfd_signed_vma data_off,
 621                                       bfd_signed_vma bss_off);
 622
 623 /* Take over the 'find_mapped_memory' vector from exec.c. */
 624 extern void exec_set_find_memory_regions (int (*) (int (*) (CORE_ADDR,
 625                                                             unsigned long,
 626                                                             int, int, int,
 627                                                             void *),
 628                                                    void *));
 629
 630 /* Possible lvalue types.  Like enum language, this should be in
 631    value.h, but needs to be here for the same reason. */
 632
 633 enum lval_type
 634   {
 635     /* Not an lval. */
 636     not_lval,
 637     /* In memory.  Could be a saved register.  */
 638     lval_memory,
 639     /* In a register.  */
 640     lval_register,
 641     /* In a gdb internal variable.  */
 642     lval_internalvar,
 643     /* Part of a gdb internal variable (structure field).  */
 644     lval_internalvar_component,
 645     /* In a register series in a frame not the current one, which may have been
 646        partially saved or saved in different places (otherwise would be
 647        lval_register or lval_memory).  */
 648     lval_reg_frame_relative
 649   };
 650
 651 /* Control types for commands */
 652
 653 enum misc_command_type
 654   {
 655     ok_command,
 656     end_command,
 657     else_command,
 658     nop_command
 659   };
 660
 661 enum command_control_type
 662   {
 663     simple_control,
 664     break_control,
 665     continue_control,
 666     while_control,
 667     if_control,
 668     invalid_control
 669   };
 670
 671 /* Structure for saved commands lines
 672    (for breakpoints, defined commands, etc).  */
 673
 674 struct command_line
 675   {
 676     struct command_line *next;
 677     char *line;
 678     enum command_control_type control_type;
 679     int body_count;
 680     struct command_line **body_list;
 681   };
 682
 683 extern struct command_line *read_command_lines (char *, int);
 684
 685 extern void free_command_lines (struct command_line **);
 686
 687 /* To continue the execution commands when running gdb asynchronously.
 688    A continuation structure contains a pointer to a function to be called
 689    to finish the command, once the target has stopped. Such mechanism is
 690    used bt the finish and until commands, and in the remote protocol
 691    when opening an extended-remote connection. */
 692
 693 struct continuation_arg
 694   {
 695     struct continuation_arg *next;
 696     union continuation_data {
 697       void *pointer;
 698       int   integer;
 699       long  longint;
 700     } data;
 701   };
 702
 703 struct continuation
 704   {
 705     void (*continuation_hook) (struct continuation_arg *);
 706     struct continuation_arg *arg_list;
 707     struct continuation *next;
 708   };
 709
 710 /* In infrun.c. */
 711 extern struct continuation *cmd_continuation;
 712 /* Used only by the step_1 function. */
 713 extern struct continuation *intermediate_continuation;
 714
 715 /* From utils.c */
 716 extern void add_continuation (void (*)(struct continuation_arg *),
 717                               struct continuation_arg *);
 718 extern void do_all_continuations (void);
 719 extern void discard_all_continuations (void);
 720
 721 extern void add_intermediate_continuation (void (*)(struct continuation_arg *),
 722                               struct continuation_arg *);
 723 extern void do_all_intermediate_continuations (void);
 724 extern void discard_all_intermediate_continuations (void);
 725
 726 /* String containing the current directory (what getwd would return).  */
 727
 728 extern char *current_directory;
 729
 730 /* Default radixes for input and output.  Only some values supported.  */
 731 extern unsigned input_radix;
 732 extern unsigned output_radix;
 733
 734 /* Possibilities for prettyprint parameters to routines which print
 735    things.  Like enum language, this should be in value.h, but needs
 736    to be here for the same reason.  FIXME:  If we can eliminate this
 737    as an arg to LA_VAL_PRINT, then we can probably move it back to
 738    value.h. */
 739
 740 enum val_prettyprint
 741   {
 742     Val_no_prettyprint = 0,
 743     Val_prettyprint,
 744     /* Use the default setting which the user has specified.  */
 745     Val_pretty_default
 746   };
 747
 748 /* The ptid struct is a collection of the various "ids" necessary
 749    for identifying the inferior.  This consists of the process id
 750    (pid), thread id (tid), and other fields necessary for uniquely
 751    identifying the inferior process/thread being debugged.  When
 752    manipulating ptids, the constructors, accessors, and predicate
 753    declared in inferior.h should be used.  These are as follows:
 754
 755       ptid_build        - Make a new ptid from a pid, lwp, and tid.
 756       pid_to_ptid       - Make a new ptid from just a pid.
 757       ptid_get_pid      - Fetch the pid component of a ptid.
 758       ptid_get_lwp      - Fetch the lwp component of a ptid.
 759       ptid_get_tid      - Fetch the tid component of a ptid.
 760       ptid_equal        - Test to see if two ptids are equal.
 761
 762    Please do NOT access the struct ptid members directly (except, of
 763    course, in the implementation of the above ptid manipulation
 764    functions).  */
 765
 766 struct ptid
 767   {
 768     /* Process id */
 769     int pid;
 770
 771     /* Lightweight process id */
 772     long lwp;
 773
 774     /* Thread id */
 775     long tid;
 776   };
 777
 778 typedef struct ptid ptid_t;
 779
 780 \f
 781
 782 /* Optional host machine definition.  Pure autoconf targets will not
 783    need a "xm.h" file.  This will be a symlink to one of the xm-*.h
 784    files, built by the `configure' script.  */
 785
 786 #ifdef GDB_XM_FILE
 787 #include "xm.h"
 788 #endif
 789
 790 /* Optional native machine support.  Non-native (and possibly pure
 791    multi-arch) targets do not need a "nm.h" file.  This will be a
 792    symlink to one of the nm-*.h files, built by the `configure'
 793    script.  */
 794
 795 #ifdef GDB_NM_FILE
 796 #include "nm.h"
 797 #endif
 798
 799 /* Optional target machine definition.  Pure multi-arch configurations
 800    do not need a "tm.h" file.  This will be a symlink to one of the
 801    tm-*.h files, built by the `configure' script.  */
 802
 803 #ifdef GDB_TM_FILE
 804 #include "tm.h"
 805 #endif
 806
 807 /* Assume that fopen accepts the letter "b" in the mode string.
 808    Support for is demanded by ISO C90, and should be supported on all
 809    platforms that claim to have a standards conforming C library.  On
 810    true POSIX systems it will be ignored and have no effect.  There
 811    may still be systems without a standards conforming C library where
 812    an ISO C90 compiler (GCC) is available.  Known examples are SunOS
 813    4.x and 4.3BSD.  This assumption means these systems are no longer
 814    supported.  */
 815 #ifndef FOPEN_RB
 816 # include "fopen-bin.h"
 817 #endif
 818
 819 /* Defaults for system-wide constants (if not defined by xm.h, we fake it).
 820    FIXME: Assumes 2's complement arithmetic */
 821
 822 #if !defined (UINT_MAX)
 823 #define UINT_MAX ((unsigned int)(~0))   /* 0xFFFFFFFF for 32-bits */
 824 #endif
 825
 826 #if !defined (INT_MAX)
 827 #define INT_MAX ((int)(UINT_MAX >> 1))  /* 0x7FFFFFFF for 32-bits */
 828 #endif
 829
 830 #if !defined (INT_MIN)
 831 #define INT_MIN ((int)((int) ~0 ^ INT_MAX))     /* 0x80000000 for 32-bits */
 832 #endif
 833
 834 #if !defined (ULONG_MAX)
 835 #define ULONG_MAX ((unsigned long)(~0L))        /* 0xFFFFFFFF for 32-bits */
 836 #endif
 837
 838 #if !defined (LONG_MAX)
 839 #define LONG_MAX ((long)(ULONG_MAX >> 1))       /* 0x7FFFFFFF for 32-bits */
 840 #endif
 841
 842 #if !defined (ULONGEST_MAX)
 843 #define ULONGEST_MAX (~(ULONGEST)0)        /* 0xFFFFFFFFFFFFFFFF for 64-bits */
 844 #endif
 845
 846 #if !defined (LONGEST_MAX)                 /* 0x7FFFFFFFFFFFFFFF for 64-bits */
 847 #define LONGEST_MAX ((LONGEST)(ULONGEST_MAX >> 1))
 848 #endif
 849
 850 /* Convert a LONGEST to an int.  This is used in contexts (e.g. number of
 851    arguments to a function, number in a value history, register number, etc.)
 852    where the value must not be larger than can fit in an int.  */
 853
 854 extern int longest_to_int (LONGEST);
 855
 856 /* Assorted functions we can declare, now that const and volatile are
 857    defined.  */
 858
 859 extern char *savestring (const char *, size_t);
 860
 861 /* xmalloc(), xrealloc() and xcalloc() have already been declared in
 862    "libiberty.h". */
 863 extern void xfree (void *);
 864
 865 /* Utility macros to allocate typed memory.  Avoids errors like:
 866    struct foo *foo = xmalloc (sizeof struct bar); and memset (foo,
 867    sizeof (struct foo), 0).  */
 868 #define XZALLOC(TYPE) ((TYPE*) memset (xmalloc (sizeof (TYPE)), 0, sizeof (TYPE)))
 869 #define XMALLOC(TYPE) ((TYPE*) xmalloc (sizeof (TYPE)))
 870 #define XCALLOC(NMEMB, TYPE) ((TYPE*) xcalloc ((NMEMB), sizeof (TYPE)))
 871
 872 /* Like asprintf/vasprintf but get an internal_error if the call
 873    fails. */
 874 extern void xasprintf (char **ret, const char *format, ...) ATTR_FORMAT (printf, 2, 3);
 875 extern void xvasprintf (char **ret, const char *format, va_list ap);
 876
 877 /* Like asprintf and vasprintf, but return the string, throw an error
 878    if no memory.  */
 879 extern char *xstrprintf (const char *format, ...) ATTR_FORMAT (printf, 1, 2);
 880 extern char *xstrvprintf (const char *format, va_list ap);
 881
 882 extern int parse_escape (char **);
 883
 884 /* Message to be printed before the error message, when an error occurs.  */
 885
 886 extern char *error_pre_print;
 887
 888 /* Message to be printed before the error message, when an error occurs.  */
 889
 890 extern char *quit_pre_print;
 891
 892 /* Message to be printed before the warning message, when a warning occurs.  */
 893
 894 extern char *warning_pre_print;
 895
 896 extern NORETURN void verror (const char *fmt, va_list ap) ATTR_NORETURN;
 897
 898 extern NORETURN void error (const char *fmt, ...) ATTR_NORETURN ATTR_FORMAT (printf, 1, 2);
 899
 900 extern NORETURN void error_silent (const char *fmt, ...) ATTR_NORETURN ATTR_FORMAT (printf, 1, 2);
 901
 902 extern NORETURN void error_stream (struct ui_file *) ATTR_NORETURN;
 903
 904 /* Initialize the error buffer.  */
 905 extern void error_init (void);
 906
 907 /* Returns a freshly allocate buffer containing the last error
 908    message.  */
 909 extern char *error_last_message (void);
 910
 911 /* Output arbitrary error message.  */
 912 extern void error_output_message (char *pre_print, char *msg);
 913
 914 extern NORETURN void internal_verror (const char *file, int line,
 915                                       const char *, va_list ap) ATTR_NORETURN;
 916
 917 extern NORETURN void internal_error (const char *file, int line,
 918                                      const char *, ...) ATTR_NORETURN ATTR_FORMAT (printf, 3, 4);
 919
 920 extern void internal_vwarning (const char *file, int line,
 921                                const char *, va_list ap);
 922
 923 extern void internal_warning (const char *file, int line,
 924                               const char *, ...) ATTR_FORMAT (printf, 3, 4);
 925
 926 extern NORETURN void nomem (long) ATTR_NORETURN;
 927
 928 /* Reasons for calling throw_exception().  NOTE: all reason values
 929    must be less than zero.  enum value 0 is reserved for internal use
 930    as the return value from an initial setjmp().  The function
 931    catch_exceptions() reserves values >= 0 as legal results from its
 932    wrapped function.  */
 933
 934 enum return_reason
 935   {
 936     /* User interrupt.  */
 937     RETURN_QUIT = -2,
 938     /* Any other error.  */
 939     RETURN_ERROR
 940   };
 941
 942 #define ALL_CLEANUPS    ((struct cleanup *)0)
 943
 944 #define RETURN_MASK(reason)     (1 << (int)(-reason))
 945 #define RETURN_MASK_QUIT        RETURN_MASK (RETURN_QUIT)
 946 #define RETURN_MASK_ERROR       RETURN_MASK (RETURN_ERROR)
 947 #define RETURN_MASK_ALL         (RETURN_MASK_QUIT | RETURN_MASK_ERROR)
 948 typedef int return_mask;
 949
 950 /* Throw an exception of type RETURN_REASON.  Will execute a LONG JUMP
 951    to the inner most containing exception handler established using
 952    catch_exceptions() (or the legacy catch_errors()).
 953
 954    Code normally throws an exception using error() et.al.  For various
 955    reaons, GDB also contains code that throws an exception directly.
 956    For instance, the remote*.c targets contain CNTRL-C signal handlers
 957    that propogate the QUIT event up the exception chain.  ``This could
 958    be a good thing or a dangerous thing.'' -- the Existential Wombat.  */
 959
 960 extern NORETURN void throw_exception (enum return_reason) ATTR_NORETURN;
 961
 962 /* Call FUNC(UIOUT, FUNC_ARGS) but wrapped within an exception
 963    handler.  If an exception (enum return_reason) is thrown using
 964    throw_exception() than all cleanups installed since
 965    catch_exceptions() was entered are invoked, the (-ve) exception
 966    value is then returned by catch_exceptions.  If FUNC() returns
 967    normally (with a postive or zero return value) then that value is
 968    returned by catch_exceptions().  It is an internal_error() for
 969    FUNC() to return a negative value.
 970
 971    For the period of the FUNC() call: UIOUT is installed as the output
 972    builder; ERRSTRING is installed as the error/quit message; and a
 973    new cleanup_chain is established.  The old values are restored
 974    before catch_exceptions() returns.
 975
 976    The variant catch_exceptions_with_msg() is the same as
 977    catch_exceptions() but adds the ability to return an allocated
 978    copy of the gdb error message.  This is used when a silent error is
 979    issued and the caller wants to manually issue the error message.
 980
 981    FIXME; cagney/2001-08-13: The need to override the global UIOUT
 982    builder variable should just go away.
 983
 984    This function superseeds catch_errors().
 985
 986    This function uses SETJMP() and LONGJUMP().  */
 987
 988 struct ui_out;
 989 typedef int (catch_exceptions_ftype) (struct ui_out *ui_out, void *args);
 990 extern int catch_exceptions (struct ui_out *uiout,
 991                              catch_exceptions_ftype *func, void *func_args,
 992                              char *errstring, return_mask mask);
 993 extern int catch_exceptions_with_msg (struct ui_out *uiout,
 994                                       catch_exceptions_ftype *func,
 995                                       void *func_args,
 996                                       char *errstring, char **gdberrmsg,
 997                                       return_mask mask);
 998
 999 /* If CATCH_ERRORS_FTYPE throws an error, catch_errors() returns zero
1000    otherwize the result from CATCH_ERRORS_FTYPE is returned. It is
1001    probably useful for CATCH_ERRORS_FTYPE to always return a non-zero
1002    value. It's unfortunate that, catch_errors() does not return an
1003    indication of the exact exception that it caught - quit_flag might
1004    help.
1005
1006    This function is superseeded by catch_exceptions().  */
1007
1008 typedef int (catch_errors_ftype) (void *);
1009 extern int catch_errors (catch_errors_ftype *, void *, char *, return_mask);
1010
1011 /* Template to catch_errors() that wraps calls to command
1012    functions. */
1013
1014 typedef void (catch_command_errors_ftype) (char *, int);
1015 extern int catch_command_errors (catch_command_errors_ftype *func, char *command, int from_tty, return_mask);
1016
1017 extern void warning (const char *, ...) ATTR_FORMAT (printf, 1, 2);
1018
1019 extern void vwarning (const char *, va_list args);
1020
1021 /* List of known OS ABIs.  If you change this, make sure to update the
1022    table in osabi.c.  */
1023 enum gdb_osabi
1024 {
1025   GDB_OSABI_UNINITIALIZED = -1, /* For struct gdbarch_info.  */
1026
1027   GDB_OSABI_UNKNOWN = 0,        /* keep this zero */
1028
1029   GDB_OSABI_SVR4,
1030   GDB_OSABI_HURD,
1031   GDB_OSABI_SOLARIS,
1032   GDB_OSABI_OSF1,
1033   GDB_OSABI_LINUX,
1034   GDB_OSABI_FREEBSD_AOUT,
1035   GDB_OSABI_FREEBSD_ELF,
1036   GDB_OSABI_NETBSD_AOUT,
1037   GDB_OSABI_NETBSD_ELF,
1038   GDB_OSABI_OPENBSD_ELF,
1039   GDB_OSABI_WINCE,
1040   GDB_OSABI_GO32,
1041   GDB_OSABI_NETWARE,
1042   GDB_OSABI_IRIX,
1043   GDB_OSABI_LYNXOS,
1044   GDB_OSABI_INTERIX,
1045   GDB_OSABI_HPUX_ELF,
1046   GDB_OSABI_HPUX_SOM,
1047
1048   GDB_OSABI_ARM_EABI_V1,
1049   GDB_OSABI_ARM_EABI_V2,
1050   GDB_OSABI_ARM_APCS,
1051   GDB_OSABI_QNXNTO,
1052
1053   GDB_OSABI_CYGWIN,
1054
1055   GDB_OSABI_INVALID             /* keep this last */
1056 };
1057
1058 /* Global functions from other, non-gdb GNU thingies.
1059    Libiberty thingies are no longer declared here.  We include libiberty.h
1060    above, instead.  */
1061
1062 /* From other system libraries */
1063
1064 #ifdef HAVE_STDDEF_H
1065 #include <stddef.h>
1066 #endif
1067
1068 #ifdef HAVE_STDLIB_H
1069 #include <stdlib.h>
1070 #endif
1071 #ifndef min
1072 #define min(a, b) ((a) < (b) ? (a) : (b))
1073 #endif
1074 #ifndef max
1075 #define max(a, b) ((a) > (b) ? (a) : (b))
1076 #endif
1077
1078
1079 #ifndef atof
1080 extern double atof (const char *);      /* X3.159-1989  4.10.1.1 */
1081 #endif
1082
1083 /* Various possibilities for alloca.  */
1084 #ifndef alloca
1085 #ifdef __GNUC__
1086 #define alloca __builtin_alloca
1087 #else /* Not GNU C */
1088 #ifdef HAVE_ALLOCA_H
1089 #include <alloca.h>
1090 #else
1091 #ifdef _AIX
1092 #pragma alloca
1093 #else
1094
1095 /* We need to be careful not to declare this in a way which conflicts with
1096    bison.  Bison never declares it as char *, but under various circumstances
1097    (like __hpux) we need to use void *.  */
1098 extern void *alloca ();
1099 #endif /* Not _AIX */
1100 #endif /* Not HAVE_ALLOCA_H */
1101 #endif /* Not GNU C */
1102 #endif /* alloca not defined */
1103
1104 /* Dynamic target-system-dependent parameters for GDB. */
1105 #include "gdbarch.h"
1106
1107 /* Maximum size of a register.  Something small, but large enough for
1108    all known ISAs.  If it turns out to be too small, make it bigger.  */
1109
1110 enum { MAX_REGISTER_SIZE = 16 };
1111
1112 /* Static target-system-dependent parameters for GDB. */
1113
1114 /* Number of bits in a char or unsigned char for the target machine.
1115    Just like CHAR_BIT in <limits.h> but describes the target machine.  */
1116 #if !defined (TARGET_CHAR_BIT)
1117 #define TARGET_CHAR_BIT 8
1118 #endif
1119
1120 /* If we picked up a copy of CHAR_BIT from a configuration file
1121    (which may get it by including <limits.h>) then use it to set
1122    the number of bits in a host char.  If not, use the same size
1123    as the target. */
1124
1125 #if defined (CHAR_BIT)
1126 #define HOST_CHAR_BIT CHAR_BIT
1127 #else
1128 #define HOST_CHAR_BIT TARGET_CHAR_BIT
1129 #endif
1130
1131 /* The bit byte-order has to do just with numbering of bits in
1132    debugging symbols and such.  Conceptually, it's quite separate
1133    from byte/word byte order.  */
1134
1135 #if !defined (BITS_BIG_ENDIAN)
1136 #define BITS_BIG_ENDIAN (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG)
1137 #endif
1138
1139 /* In findvar.c.  */
1140
1141 extern LONGEST extract_signed_integer (const void *, int);
1142
1143 extern ULONGEST extract_unsigned_integer (const void *, int);
1144
1145 extern int extract_long_unsigned_integer (const void *, int, LONGEST *);
1146
1147 extern CORE_ADDR extract_typed_address (const void *buf, struct type *type);
1148
1149 extern void store_signed_integer (void *, int, LONGEST);
1150
1151 extern void store_unsigned_integer (void *, int, ULONGEST);
1152
1153 extern void store_typed_address (void *buf, struct type *type, CORE_ADDR addr);
1154
1155 \f
1156 /* From valops.c */
1157
1158 extern CORE_ADDR push_bytes (CORE_ADDR, char *, int);
1159
1160 extern CORE_ADDR push_word (CORE_ADDR, ULONGEST);
1161
1162 extern int watchdog;
1163
1164 /* Hooks for alternate command interfaces.  */
1165
1166 /* The name of the interpreter if specified on the command line. */
1167 extern char *interpreter_p;
1168
1169 /* If a given interpreter matches INTERPRETER_P then it should update
1170    deprecated_command_loop_hook and deprecated_init_ui_hook with the
1171    per-interpreter implementation.  */
1172 /* FIXME: deprecated_command_loop_hook and deprecated_init_ui_hook
1173    should be moved here. */
1174
1175 struct target_waitstatus;
1176 struct cmd_list_element;
1177
1178 extern void (*deprecated_pre_add_symbol_hook) (const char *);
1179 extern void (*deprecated_post_add_symbol_hook) (void);
1180 extern void (*selected_frame_level_changed_hook) (int);
1181 extern int (*deprecated_ui_loop_hook) (int signo);
1182 extern void (*deprecated_init_ui_hook) (char *argv0);
1183 extern void (*deprecated_command_loop_hook) (void);
1184 extern void (*deprecated_show_load_progress) (const char *section,
1185                                               unsigned long section_sent,
1186                                               unsigned long section_size,
1187                                               unsigned long total_sent,
1188                                               unsigned long total_size);
1189 extern void (*deprecated_print_frame_info_listing_hook) (struct symtab * s,
1190                                                          int line, int stopline,
1191                                                          int noerror);
1192 extern struct frame_info *parse_frame_specification (char *frame_exp);
1193 extern int (*deprecated_query_hook) (const char *, va_list);
1194 extern void (*deprecated_warning_hook) (const char *, va_list);
1195 extern void (*deprecated_flush_hook) (struct ui_file * stream);
1196 extern void (*deprecated_create_breakpoint_hook) (struct breakpoint * b);
1197 extern void (*deprecated_delete_breakpoint_hook) (struct breakpoint * bpt);
1198 extern void (*deprecated_modify_breakpoint_hook) (struct breakpoint * bpt);
1199 extern void (*deprecated_interactive_hook) (void);
1200 extern void (*deprecated_registers_changed_hook) (void);
1201 extern void (*deprecated_readline_begin_hook) (char *,...);
1202 extern char *(*deprecated_readline_hook) (char *);
1203 extern void (*deprecated_readline_end_hook) (void);
1204 extern void (*deprecated_register_changed_hook) (int regno);
1205 extern void (*deprecated_memory_changed_hook) (CORE_ADDR addr, int len);
1206 extern void (*deprecated_context_hook) (int);
1207 extern ptid_t (*deprecated_target_wait_hook) (ptid_t ptid,
1208                                          struct target_waitstatus * status);
1209
1210 extern void (*deprecated_attach_hook) (void);
1211 extern void (*deprecated_detach_hook) (void);
1212 extern void (*deprecated_call_command_hook) (struct cmd_list_element * c,
1213                                              char *cmd, int from_tty);
1214
1215 extern void (*deprecated_set_hook) (struct cmd_list_element * c);
1216
1217 extern void (*deprecated_error_hook) (void);
1218
1219 extern void (*deprecated_error_begin_hook) (void);
1220
1221 extern int (*deprecated_ui_load_progress_hook) (const char *section,
1222                                                 unsigned long num);
1223
1224
1225 /* Inhibit window interface if non-zero. */
1226
1227 extern int use_windows;
1228
1229 /* Symbolic definitions of filename-related things.  */
1230 /* FIXME, this doesn't work very well if host and executable
1231    filesystems conventions are different.  */
1232
1233 #ifndef DIRNAME_SEPARATOR
1234 #define DIRNAME_SEPARATOR ':'
1235 #endif
1236
1237 #ifndef SLASH_STRING
1238 #define SLASH_STRING "/"
1239 #endif
1240
1241 #ifdef __MSDOS__
1242 # define CANT_FORK
1243 # define GLOBAL_CURDIR
1244 #endif
1245
1246 /* Provide default definitions of PIDGET, TIDGET, and MERGEPID.
1247    The name ``TIDGET'' is a historical accident.  Many uses of TIDGET
1248    in the code actually refer to a lightweight process id, i.e,
1249    something that can be considered a process id in its own right for
1250    certain purposes.  */
1251
1252 #ifndef PIDGET
1253 #define PIDGET(PTID) (ptid_get_pid (PTID))
1254 #define TIDGET(PTID) (ptid_get_lwp (PTID))
1255 #define MERGEPID(PID, TID) ptid_build (PID, TID, 0)
1256 #endif
1257
1258 /* Define well known filenos if the system does not define them.  */
1259 #ifndef STDIN_FILENO
1260 #define STDIN_FILENO   0
1261 #endif
1262 #ifndef STDOUT_FILENO
1263 #define STDOUT_FILENO  1
1264 #endif
1265 #ifndef STDERR_FILENO
1266 #define STDERR_FILENO  2
1267 #endif
1268
1269 /* If this definition isn't overridden by the header files, assume
1270    that isatty and fileno exist on this system.  */
1271 #ifndef ISATTY
1272 #define ISATTY(FP)      (isatty (fileno (FP)))
1273 #endif
1274
1275 /* Ensure that V is aligned to an N byte boundary (B's assumed to be a
1276    power of 2).  Round up/down when necessary.  Examples of correct
1277    use include:
1278
1279    addr = align_up (addr, 8); -- VALUE needs 8 byte alignment
1280    write_memory (addr, value, len);
1281    addr += len;
1282
1283    and:
1284
1285    sp = align_down (sp - len, 16); -- Keep SP 16 byte aligned
1286    write_memory (sp, value, len);
1287
1288    Note that uses such as:
1289
1290    write_memory (addr, value, len);
1291    addr += align_up (len, 8);
1292
1293    and:
1294
1295    sp -= align_up (len, 8);
1296    write_memory (sp, value, len);
1297
1298    are typically not correct as they don't ensure that the address (SP
1299    or ADDR) is correctly aligned (relying on previous alignment to
1300    keep things right).  This is also why the methods are called
1301    "align_..." instead of "round_..." as the latter reads better with
1302    this incorrect coding style.  */
1303
1304 extern ULONGEST align_up (ULONGEST v, int n);
1305 extern ULONGEST align_down (ULONGEST v, int n);
1306
1307 #endif /* #ifndef DEFS_H */