aboutsummaryrefslogtreecommitdiff
path: root/gdb/defs.h
blob: 884d5ad248fc46037f878ac3cad003f006df8f1a (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
/* Basic, host-specific, and target-specific definitions for GDB.
   Copyright (C) 1986, 1989, 1991, 1992, 1993, 1994, 1995
   Free Software Foundation, Inc.

This file is part of GDB.

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */

#ifndef DEFS_H
#define DEFS_H

#include <stdio.h>

/* First include ansidecl.h so we can use the various macro definitions
   here and in all subsequent file inclusions.  */

#include "ansidecl.h"

#include "libiberty.h"

/* libiberty.h can't declare this one, but evidently we can.  */
extern char *strsignal PARAMS ((int));

#include "progress.h"

#include "mmalloc.h"

/* For BFD64 and bfd_vma.  */
#include "bfd.h"

/* An address in the program being debugged.  Host byte order.  Rather
   than duplicate all the logic in BFD which figures out what type
   this is (long, long long, etc.) and whether it needs to be 64
   bits (the host/target interactions are subtle), we just use
   bfd_vma.  */

typedef bfd_vma CORE_ADDR;

#define min(a, b) ((a) < (b) ? (a) : (b))
#define max(a, b) ((a) > (b) ? (a) : (b))

/* Gdb does *lots* of string compares.  Use macros to speed them up by
   avoiding function calls if the first characters are not the same. */

#define STRCMP(a,b) (*(a) == *(b) ? strcmp ((a), (b)) : (int)*(a) - (int)*(b))
#define STREQ(a,b) (*(a) == *(b) ? !strcmp ((a), (b)) : 0)
#define STREQN(a,b,c) (*(a) == *(b) ? !strncmp ((a), (b), (c)) : 0)

/* The character GNU C++ uses to build identifiers that must be unique from
   the program's identifiers (such as $this and $$vptr).  */
#define CPLUS_MARKER '$'	/* May be overridden to '.' for SysV */

#include <errno.h>		/* System call error return status */

extern int quit_flag;
extern int immediate_quit;
extern int sevenbit_strings;

extern void quit PARAMS ((void));

#define QUIT { \
  if (quit_flag) quit (); \
  if (interactive_hook) interactive_hook (); \
  PROGRESS (1); \
}

/* Command classes are top-level categories into which commands are broken
   down for "help" purposes.  
   Notes on classes: class_alias is for alias commands which are not
   abbreviations of the original command.  class-pseudo is for commands
   which are not really commands nor help topics ("stop").  */

enum command_class
{
  /* Special args to help_list */
  all_classes = -2, all_commands = -1,
  /* Classes of commands */
  no_class = -1, class_run = 0, class_vars, class_stack,
  class_files, class_support, class_info, class_breakpoint,
  class_alias, class_obscure, class_user, class_maintenance,
  class_pseudo
};

/* Languages represented in the symbol table and elsewhere.
   This should probably be in language.h, but since enum's can't
   be forward declared to satisfy opaque references before their
   actual definition, needs to be here. */

enum language 
{
   language_unknown, 		/* Language not known */
   language_auto,		/* Placeholder for automatic setting */
   language_c, 			/* C */
   language_cplus, 		/* C++ */
   language_chill,		/* Chill */
   language_fortran,		/* Fortran */
   language_m2,			/* Modula-2 */
   language_asm			/* Assembly language */
};

/* the cleanup list records things that have to be undone
   if an error happens (descriptors to be closed, memory to be freed, etc.)
   Each link in the chain records a function to call and an
   argument to give it.

   Use make_cleanup to add an element to the cleanup chain.
   Use do_cleanups to do all cleanup actions back to a given
   point in the chain.  Use discard_cleanups to remove cleanups
   from the chain back to a given point, not doing them.  */

struct cleanup
{
  struct cleanup *next;
  void (*function) PARAMS ((PTR));
  PTR arg;
};

/* Needed for various prototypes */

#ifdef __STDC__
struct symtab;
struct breakpoint;
#endif

/* From blockframe.c */

extern int inside_entry_func PARAMS ((CORE_ADDR));

extern int inside_entry_file PARAMS ((CORE_ADDR addr));

extern int inside_main_func PARAMS ((CORE_ADDR pc));

/* From ch-lang.c, for the moment. (FIXME) */

extern char *chill_demangle PARAMS ((const char *));

/* From utils.c */

extern int strcmp_iw PARAMS ((const char *, const char *));

extern char *safe_strerror PARAMS ((int));

extern char *safe_strsignal PARAMS ((int));

extern void init_malloc PARAMS ((void *));

extern void request_quit PARAMS ((int));

extern void do_cleanups PARAMS ((struct cleanup *));

extern void discard_cleanups PARAMS ((struct cleanup *));

/* The bare make_cleanup function is one of those rare beasts that
   takes almost any type of function as the first arg and anything that
   will fit in a "void *" as the second arg.

   Should be, once all calls and called-functions are cleaned up:
extern struct cleanup *
make_cleanup PARAMS ((void (*function) (void *), void *));

   Until then, lint and/or various type-checking compiler options will
   complain about make_cleanup calls.  It'd be wrong to just cast things,
   since the type actually passed when the function is called would be
   wrong.  */

extern struct cleanup *make_cleanup ();

extern struct cleanup *save_cleanups PARAMS ((void));

extern void restore_cleanups PARAMS ((struct cleanup *));

extern void free_current_contents PARAMS ((char **));

extern void null_cleanup PARAMS ((char **));

extern int myread PARAMS ((int, char *, int));

extern int query ();

/* Annotation stuff.  */

extern int annotation_level; /* in stack.c */

extern void begin_line PARAMS ((void));

extern void wrap_here PARAMS ((char *));

extern void reinitialize_more_filter PARAMS ((void));

typedef FILE GDB_FILE;
#define gdb_stdout stdout
#define gdb_stderr stderr

extern void gdb_flush PARAMS ((GDB_FILE *));

extern GDB_FILE *gdb_fopen PARAMS ((char * name, char * mode));

extern void fputs_filtered PARAMS ((const char *, GDB_FILE *));

extern void fputs_unfiltered PARAMS ((const char *, GDB_FILE *));

extern void fputc_unfiltered PARAMS ((int, GDB_FILE *));

extern void putc_unfiltered PARAMS ((int));

#define putchar_unfiltered(C)  putc_unfiltered(C)

extern void puts_filtered PARAMS ((char *));

extern void puts_unfiltered PARAMS ((char *));

extern void vprintf_filtered ();

extern void vfprintf_filtered ();

extern void fprintf_filtered ();

extern void fprintfi_filtered ();

extern void printf_filtered ();

extern void printfi_filtered ();

extern void vprintf_unfiltered ();

extern void vfprintf_unfiltered ();

extern void fprintf_unfiltered ();

extern void printf_unfiltered ();

extern void print_spaces PARAMS ((int, GDB_FILE *));

extern void print_spaces_filtered PARAMS ((int, GDB_FILE *));

extern char *n_spaces PARAMS ((int));

extern void gdb_printchar PARAMS ((int, GDB_FILE *, int));

extern void gdb_print_address PARAMS ((void *, GDB_FILE *));

extern void fprintf_symbol_filtered PARAMS ((GDB_FILE *, char *,
					     enum language, int));

extern void perror_with_name PARAMS ((char *));

extern void print_sys_errmsg PARAMS ((char *, int));

/* From regex.c or libc.  BSD 4.4 declares this with the argument type as
   "const char *" in unistd.h, so we can't declare the argument
   as "char *".  */

extern char *re_comp PARAMS ((const char *));

/* From symfile.c */

extern void symbol_file_command PARAMS ((char *, int));

/* From main.c */

extern char *skip_quoted PARAMS ((char *));

extern char *gdb_readline PARAMS ((char *));

extern char *command_line_input PARAMS ((char *, int, char *));

extern void print_prompt PARAMS ((void));

extern int input_from_terminal_p PARAMS ((void));

/* From printcmd.c */

extern void set_next_address PARAMS ((CORE_ADDR));

extern void print_address_symbolic PARAMS ((CORE_ADDR, GDB_FILE *, int,
					    char *));

extern void print_address_numeric PARAMS ((CORE_ADDR, int, GDB_FILE *));

extern void print_address PARAMS ((CORE_ADDR, GDB_FILE *));

/* From source.c */

extern int openp PARAMS ((char *, int, char *, int, int, char **));

extern void mod_path PARAMS ((char *, char **));

extern void directory_command PARAMS ((char *, int));

extern void init_source_path PARAMS ((void));

extern char *symtab_to_filename PARAMS ((struct symtab *));

/* From findvar.c */

extern int read_relative_register_raw_bytes PARAMS ((int, char *));

/* From readline (but not in any readline .h files).  */

extern char *tilde_expand PARAMS ((char *));

/* Control types for commands */

enum misc_command_type
{
  ok_command,
  end_command,
  else_command,
  nop_command
};

enum command_control_type
{
  simple_control,
  break_control,
  continue_control,
  while_control,
  if_control,
  invalid_control
};

/* Structure for saved commands lines
   (for breakpoints, defined commands, etc).  */

struct command_line
{
  struct command_line *next;
  char *line;
  enum command_control_type control_type;
  int body_count;
  struct command_line **body_list;
};

extern struct command_line *read_command_lines PARAMS ((void));

extern void free_command_lines PARAMS ((struct command_line **));

/* String containing the current directory (what getwd would return).  */

extern char *current_directory;

/* Default radixes for input and output.  Only some values supported.  */
extern unsigned input_radix;
extern unsigned output_radix;

/* Possibilities for prettyprint parameters to routines which print
   things.  Like enum language, this should be in value.h, but needs
   to be here for the same reason.  FIXME:  If we can eliminate this
   as an arg to LA_VAL_PRINT, then we can probably move it back to
   value.h. */

enum val_prettyprint
{
  Val_no_prettyprint = 0,
  Val_prettyprint,
  /* Use the default setting which the user has specified.  */
  Val_pretty_default
};


/* Host machine definition.  This will be a symlink to one of the
   xm-*.h files, built by the `configure' script.  */

#include "xm.h"

/* Native machine support.  This will be a symlink to one of the
   nm-*.h files, built by the `configure' script.  */

#include "nm.h"

/* Target machine definition.  This will be a symlink to one of the
   tm-*.h files, built by the `configure' script.  */

#include "tm.h"

/* If the xm.h file did not define the mode string used to open the
   files, assume that binary files are opened the same way as text
   files */
#ifndef FOPEN_RB
#include "fopen-same.h"
#endif

/*
 * Allow things in gdb to be declared "const".  If compiling ANSI, it
 * just works.  If compiling with gcc but non-ansi, redefine to __const__.
 * If non-ansi, non-gcc, then eliminate "const" entirely, making those
 * objects be read-write rather than read-only.
 */

#ifndef const
#ifndef __STDC__
# ifdef __GNUC__
#  define const __const__
# else
#  define const /*nothing*/
# endif /* GNUC */
#endif /* STDC */
#endif /* const */

#ifndef volatile
#ifndef __STDC__
# ifdef __GNUC__
#  define volatile __volatile__
# else
#  define volatile /*nothing*/
# endif /* GNUC */
#endif /* STDC */
#endif /* volatile */

/* The ability to declare that a function never returns is useful, but
   not really required to compile GDB successfully, so the NORETURN and
   ATTR_NORETURN macros normally expand into nothing.  */

/* If compiling with older versions of GCC, a function may be declared
   "volatile" to indicate that it does not return.  */

#ifndef NORETURN
# if defined(__GNUC__) \
     && (__GNUC__ == 1 || (__GNUC__ == 2 && __GNUC_MINOR__ < 5))
#  define NORETURN volatile
# else
#  define NORETURN /* nothing */
# endif
#endif

/* GCC 2.5 and later versions define a function attribute "noreturn",
   which is the preferred way to declare that a function never returns.  */

#ifndef ATTR_NORETURN
# if defined(__GNUC__) && __GNUC__ >= 2 && __GNUC_MINOR__ >= 5
#  define ATTR_NORETURN __attribute__ ((noreturn))
# else
#  define ATTR_NORETURN /* nothing */
# endif
#endif

/* Defaults for system-wide constants (if not defined by xm.h, we fake it).  */

#if !defined (UINT_MAX)
#define	UINT_MAX ((unsigned int)(~0))		/* 0xFFFFFFFF for 32-bits */
#endif

#if !defined (INT_MAX)
#define	INT_MAX ((int)(UINT_MAX >> 1))		/* 0x7FFFFFFF for 32-bits */
#endif

#if !defined (INT_MIN)
#define INT_MIN (-INT_MAX - 1)			/* 0x80000000 for 32-bits */
#endif

#if !defined (ULONG_MAX)
#define	ULONG_MAX ((unsigned long)(~0L))	/* 0xFFFFFFFF for 32-bits */
#endif

#if !defined (LONG_MAX)
#define	LONG_MAX ((long)(ULONG_MAX >> 1))	/* 0x7FFFFFFF for 32-bits */
#endif

#ifdef BFD64

/* This is to make sure that LONGEST is at least as big as CORE_ADDR.  */

#define LONGEST BFD_HOST_64_BIT

#else /* No BFD64 */

/* If all compilers for this host support "long long" and we want to
   use it for LONGEST (the performance hit is about 10% on a testsuite
   run based on one DECstation test), then the xm.h file can define
   CC_HAS_LONG_LONG.

   Using GCC 1.39 on BSDI with long long causes about 700 new
   testsuite failures.  Using long long for LONGEST on the DECstation
   causes 3 new FAILs in the testsuite and many heuristic fencepost
   warnings.  These are not investigated, but a first guess would be
   that the BSDI problems are GCC bugs in long long support and the
   latter are GDB bugs.  */

#ifndef CC_HAS_LONG_LONG
#  if defined (__GNUC__) && defined (FORCE_LONG_LONG)
#    define CC_HAS_LONG_LONG 1
#  endif
#endif

/* LONGEST should not be a typedef, because "unsigned LONGEST" needs to work.
   CC_HAS_LONG_LONG is defined if the host compiler supports "long long"
   variables and we wish to make use of that support.  */

#ifndef LONGEST
#  ifdef CC_HAS_LONG_LONG
#    define LONGEST long long
#  else
#    define LONGEST long
#  endif
#endif

#endif /* No BFD64 */

/* Convert a LONGEST to an int.  This is used in contexts (e.g. number of
   arguments to a function, number in a value history, register number, etc.)
   where the value must not be larger than can fit in an int.  */

extern int longest_to_int PARAMS ((LONGEST));

/* Assorted functions we can declare, now that const and volatile are 
   defined.  */

extern char *savestring PARAMS ((const char *, int));

extern char *msavestring PARAMS ((void *, const char *, int));

extern char *strsave PARAMS ((const char *));

extern char *mstrsave PARAMS ((void *, const char *));

extern PTR xmalloc PARAMS ((long));

extern PTR xrealloc PARAMS ((PTR, long));

extern PTR xmmalloc PARAMS ((PTR, long));

extern PTR xmrealloc PARAMS ((PTR, PTR, long));

extern int parse_escape PARAMS ((char **));

extern char *reg_names[];

/* Message to be printed before the error message, when an error occurs.  */

extern char *error_pre_print;

/* Message to be printed before the warning message, when a warning occurs.  */

extern char *warning_pre_print;

extern NORETURN void error () ATTR_NORETURN;

extern void error_begin PARAMS ((void));

extern NORETURN void fatal () ATTR_NORETURN;

extern NORETURN void nomem PARAMS ((long)) ATTR_NORETURN;

/* Reasons for calling return_to_top_level.  */
enum return_reason {
  /* User interrupt.  */
  RETURN_QUIT,

  /* Any other error.  */
  RETURN_ERROR
};

#define RETURN_MASK_QUIT (1 << (int)RETURN_QUIT)
#define RETURN_MASK_ERROR (1 << (int)RETURN_ERROR)
#define RETURN_MASK_ALL (RETURN_MASK_QUIT | RETURN_MASK_ERROR)
typedef int return_mask;

extern NORETURN void
return_to_top_level PARAMS ((enum return_reason)) ATTR_NORETURN;

extern int
catch_errors PARAMS ((int (*) (char *), void *, char *, return_mask));

extern void warning_setup PARAMS ((void));

extern void warning ();

/* Global functions from other, non-gdb GNU thingies.
   Libiberty thingies are no longer declared here.  We include libiberty.h
   above, instead.  */

extern char *getenv PARAMS ((const char *));

/* From other system libraries */

#ifndef PSIGNAL_IN_SIGNAL_H
extern void psignal PARAMS ((unsigned, const char *));
#endif

#ifdef __STDC__
#include <stddef.h>
#include <stdlib.h>
#endif

extern int fclose ();

extern double atof ();

#ifndef MALLOC_INCOMPATIBLE

extern PTR malloc ();

extern PTR realloc ();

extern void free ();

#endif /* MALLOC_INCOMPATIBLE */

extern char *strchr ();

extern char *strrchr ();

extern char *strstr ();

extern char *strtok ();

extern char *strerror ();

/* Various possibilities for alloca.  */
#ifndef alloca
# ifdef __GNUC__
#  define alloca __builtin_alloca
# else /* Not GNU C */
#  ifdef sparc
#   include <alloca.h>		/* NOTE:  Doesn't declare alloca() */
#  endif

/* We need to be careful not to declare this in a way which conflicts with
   bison.  Bison never declares it as char *, but under various circumstances
   (like __hpux) we need to use void *.  */
#  if defined (__STDC__) || defined (__hpux)
   extern void *alloca ();
#  else /* Don't use void *.  */
   extern char *alloca ();
#  endif /* Don't use void *.  */
# endif /* Not GNU C */
#endif /* alloca not defined */

/* HOST_BYTE_ORDER must be defined to one of these.  */

#if !defined (BIG_ENDIAN)
#define BIG_ENDIAN 4321
#endif

#if !defined (LITTLE_ENDIAN)
#define LITTLE_ENDIAN 1234
#endif

/* Target-system-dependent parameters for GDB. */

#ifdef TARGET_BYTE_ORDER_SELECTABLE
/* The target endianness is selectable at runtime.  Define
   TARGET_BYTE_ORDER to be a variable.  The user can use the `set
   endian' command to change it.  */
#undef TARGET_BYTE_ORDER
#define TARGET_BYTE_ORDER target_byte_order
extern int target_byte_order;
#endif

extern void set_endian_from_file PARAMS ((bfd *));

/* Number of bits in a char or unsigned char for the target machine.
   Just like CHAR_BIT in <limits.h> but describes the target machine.  */
#if !defined (TARGET_CHAR_BIT)
#define TARGET_CHAR_BIT 8
#endif

/* Number of bits in a short or unsigned short for the target machine. */
#if !defined (TARGET_SHORT_BIT)
#define TARGET_SHORT_BIT (2 * TARGET_CHAR_BIT)
#endif

/* Number of bits in an int or unsigned int for the target machine. */
#if !defined (TARGET_INT_BIT)
#define TARGET_INT_BIT (4 * TARGET_CHAR_BIT)
#endif

/* Number of bits in a long or unsigned long for the target machine. */
#if !defined (TARGET_LONG_BIT)
#define TARGET_LONG_BIT (4 * TARGET_CHAR_BIT)
#endif

/* Number of bits in a long long or unsigned long long for the target machine. */
#if !defined (TARGET_LONG_LONG_BIT)
#define TARGET_LONG_LONG_BIT (2 * TARGET_LONG_BIT)
#endif

/* Number of bits in a float for the target machine. */
#if !defined (TARGET_FLOAT_BIT)
#define TARGET_FLOAT_BIT (4 * TARGET_CHAR_BIT)
#endif

/* Number of bits in a double for the target machine. */
#if !defined (TARGET_DOUBLE_BIT)
#define TARGET_DOUBLE_BIT (8 * TARGET_CHAR_BIT)
#endif

/* Number of bits in a long double for the target machine.  */
#if !defined (TARGET_LONG_DOUBLE_BIT)
#define TARGET_LONG_DOUBLE_BIT (2 * TARGET_DOUBLE_BIT)
#endif

/* Number of bits in a pointer for the target machine */
#if !defined (TARGET_PTR_BIT)
#define TARGET_PTR_BIT TARGET_INT_BIT
#endif

/* If we picked up a copy of CHAR_BIT from a configuration file
   (which may get it by including <limits.h>) then use it to set
   the number of bits in a host char.  If not, use the same size
   as the target. */

#if defined (CHAR_BIT)
#define HOST_CHAR_BIT CHAR_BIT
#else
#define HOST_CHAR_BIT TARGET_CHAR_BIT
#endif

/* The bit byte-order has to do just with numbering of bits in
   debugging symbols and such.  Conceptually, it's quite separate
   from byte/word byte order.  */

#if !defined (BITS_BIG_ENDIAN)
#ifndef TARGET_BYTE_ORDER_SELECTABLE

#if TARGET_BYTE_ORDER == BIG_ENDIAN
#define BITS_BIG_ENDIAN 1
#endif /* Big endian.  */

#if TARGET_BYTE_ORDER == LITTLE_ENDIAN
#define BITS_BIG_ENDIAN 0
#endif /* Little endian.  */

#else /* defined (TARGET_BYTE_ORDER_SELECTABLE) */

#define BITS_BIG_ENDIAN (TARGET_BYTE_ORDER == BIG_ENDIAN)

#endif /* defined (TARGET_BYTE_ORDER_SELECTABLE) */
#endif /* BITS_BIG_ENDIAN not defined.  */

/* Swap LEN bytes at BUFFER between target and host byte-order.  */
#define SWAP_TARGET_AND_HOST(buffer,len) \
  do                                                                    \
    {                                                                   \
      if (TARGET_BYTE_ORDER != HOST_BYTE_ORDER)                         \
        {                                                               \
          char tmp;                                                     \
          char *p = (char *)(buffer);                                   \
          char *q = ((char *)(buffer)) + len - 1;                       \
          for (; p < q; p++, q--)                                       \
            {                                                           \
              tmp = *q;                                                 \
              *q = *p;                                                  \
              *p = tmp;                                                 \
            }                                                           \
        }                                                               \
    }                                                                   \
  while (0)

/* In findvar.c.  */

extern LONGEST extract_signed_integer PARAMS ((void *, int));

extern unsigned LONGEST extract_unsigned_integer PARAMS ((void *, int));

extern CORE_ADDR extract_address PARAMS ((void *, int));

extern void store_signed_integer PARAMS ((void *, int, LONGEST));

extern void store_unsigned_integer PARAMS ((void *, int, unsigned LONGEST));

extern void store_address PARAMS ((void *, int, CORE_ADDR));

extern double extract_floating PARAMS ((void *, int));

extern void store_floating PARAMS ((void *, int, double));

/* On some machines there are bits in addresses which are not really
   part of the address, but are used by the kernel, the hardware, etc.
   for special purposes.  ADDR_BITS_REMOVE takes out any such bits
   so we get a "real" address such as one would find in a symbol
   table.  This is used only for addresses of instructions, and even then
   I'm not sure it's used in all contexts.  It exists to deal with there
   being a few stray bits in the PC which would mislead us, not as some sort
   of generic thing to handle alignment or segmentation (it's possible it
   should be in TARGET_READ_PC instead).  */
#if !defined (ADDR_BITS_REMOVE)
#define ADDR_BITS_REMOVE(addr) (addr)
#endif /* No ADDR_BITS_REMOVE.  */

/* From valops.c */

extern CORE_ADDR push_bytes PARAMS ((CORE_ADDR, char *, int));

extern CORE_ADDR push_word PARAMS ((CORE_ADDR, unsigned LONGEST));

/* Some parts of gdb might be considered optional, in the sense that they
   are not essential for being able to build a working, usable debugger
   for a specific environment.  For example, the maintenance commands
   are there for the benefit of gdb maintainers.  As another example,
   some environments really don't need gdb's that are able to read N
   different object file formats.  In order to make it possible (but
   not necessarily recommended) to build "stripped down" versions of
   gdb, the following defines control selective compilation of those
   parts of gdb which can be safely left out when necessary.  Note that
   the default is to include everything. */

#ifndef MAINTENANCE_CMDS
#define MAINTENANCE_CMDS 1
#endif

#include "dis-asm.h"		/* Get defs for disassemble_info */

extern int dis_asm_read_memory PARAMS ((bfd_vma memaddr, bfd_byte *myaddr,
					int len, disassemble_info *info));

extern void dis_asm_memory_error PARAMS ((int status, bfd_vma memaddr,
					  disassemble_info *info));

extern void dis_asm_print_address PARAMS ((bfd_vma addr,
					   disassemble_info *info));

extern int (*tm_print_insn) PARAMS ((bfd_vma, disassemble_info*));

/* Hooks for alternate command interfaces.  */

#ifdef __STDC__
struct target_waitstatus;
struct cmd_list_element;
#endif

extern void (*init_ui_hook) PARAMS ((void));
extern void (*command_loop_hook) PARAMS ((void));
extern void (*fputs_unfiltered_hook) PARAMS ((const char *linebuffer,
					      FILE *stream));
extern void (*print_frame_info_listing_hook) PARAMS ((struct symtab *s,
						      int line, int stopline,
						      int noerror));
extern int (*query_hook) PARAMS (());
extern void (*flush_hook) PARAMS ((FILE *stream));
extern void (*create_breakpoint_hook) PARAMS ((struct breakpoint *b));
extern void (*delete_breakpoint_hook) PARAMS ((struct breakpoint *bpt));
extern void (*modify_breakpoint_hook) PARAMS ((struct breakpoint *bpt));
extern void (*interactive_hook) PARAMS ((void));
extern void (*registers_changed_hook) PARAMS ((void));

extern int (*target_wait_hook) PARAMS ((int pid,
					struct target_waitstatus *status));

extern void (*call_command_hook) PARAMS ((struct cmd_list_element *c,
					  char *cmd, int from_tty));

extern NORETURN void (*error_hook) PARAMS (());

/* Inhibit window interface if non-zero. */

extern int use_windows;

#endif /* #ifndef DEFS_H */