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[/] [or1k/] [trunk/] [insight/] [gdb/] [inferior.h] - Blame information for rev 1765

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1 578 markom
/* Variables that describe the inferior process running under GDB:
2
   Where it is, why it stopped, and how to step it.
3
   Copyright 1986, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996,
4
   1998, 1999, 2000, 2001 Free Software Foundation, Inc.
5
 
6
   This file is part of GDB.
7
 
8
   This program is free software; you can redistribute it and/or modify
9
   it under the terms of the GNU General Public License as published by
10
   the Free Software Foundation; either version 2 of the License, or
11
   (at your option) any later version.
12
 
13
   This program is distributed in the hope that it will be useful,
14
   but WITHOUT ANY WARRANTY; without even the implied warranty of
15
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16
   GNU General Public License for more details.
17
 
18
   You should have received a copy of the GNU General Public License
19
   along with this program; if not, write to the Free Software
20
   Foundation, Inc., 59 Temple Place - Suite 330,
21
   Boston, MA 02111-1307, USA.  */
22
 
23
#if !defined (INFERIOR_H)
24
#define INFERIOR_H 1
25
 
26
/* For bpstat.  */
27
#include "breakpoint.h"
28
 
29
/* For enum target_signal.  */
30
#include "target.h"
31
 
32
/* Structure in which to save the status of the inferior.  Create/Save
33
   through "save_inferior_status", restore through
34
   "restore_inferior_status".
35
 
36
   This pair of routines should be called around any transfer of
37
   control to the inferior which you don't want showing up in your
38
   control variables.  */
39
 
40
struct inferior_status;
41
 
42
extern struct inferior_status *save_inferior_status (int);
43
 
44
extern void restore_inferior_status (struct inferior_status *);
45
 
46
extern struct cleanup *make_cleanup_restore_inferior_status (struct inferior_status *);
47
 
48
extern void discard_inferior_status (struct inferior_status *);
49
 
50
extern void write_inferior_status_register (struct inferior_status
51
                                            *inf_status, int regno,
52
                                            LONGEST val);
53
 
54
/* The -1 ptid, often used to indicate either an error condition
55
   or a "don't care" condition, i.e, "run all threads."  */
56
extern ptid_t minus_one_ptid;
57
 
58
/* The null or zero ptid, often used to indicate no process. */
59
extern ptid_t null_ptid;
60
 
61
/* Attempt to find and return an existing ptid with the given PID, LWP,
62
   and TID components.  If none exists, create a new one and return
63
   that.  */
64
ptid_t ptid_build (int pid, long lwp, long tid);
65
 
66
/* Find/Create a ptid from just a pid. */
67
ptid_t pid_to_ptid (int pid);
68
 
69
/* Fetch the pid (process id) component from a ptid. */
70
int ptid_get_pid (ptid_t ptid);
71
 
72
/* Fetch the lwp (lightweight process) component from a ptid. */
73
long ptid_get_lwp (ptid_t ptid);
74
 
75
/* Fetch the tid (thread id) component from a ptid. */
76
long ptid_get_tid (ptid_t ptid);
77
 
78
/* Compare two ptids to see if they are equal */
79
extern int ptid_equal (ptid_t p1, ptid_t p2);
80
 
81
/* Save value of inferior_ptid so that it may be restored by
82
   a later call to do_cleanups().  Returns the struct cleanup
83
   pointer needed for later doing the cleanup.  */
84
extern struct cleanup * save_inferior_ptid (void);
85
 
86
extern void set_sigint_trap (void);
87
 
88
extern void clear_sigint_trap (void);
89
 
90
extern void set_sigio_trap (void);
91
 
92
extern void clear_sigio_trap (void);
93
 
94
/* File name for default use for standard in/out in the inferior.  */
95
 
96
extern char *inferior_io_terminal;
97
 
98
/* Collected pid, tid, etc. of the debugged inferior.  When there's
99
   no inferior, PIDGET (inferior_ptid) will be 0. */
100
 
101
extern ptid_t inferior_ptid;
102
 
103
/* Is the inferior running right now, as a result of a 'run&',
104
   'continue&' etc command? This is used in asycn gdb to determine
105
   whether a command that the user enters while the target is running
106
   is allowed or not. */
107
extern int target_executing;
108
 
109
/* Are we simulating synchronous execution? This is used in async gdb
110
   to implement the 'run', 'continue' etc commands, which will not
111
   redisplay the prompt until the execution is actually over. */
112
extern int sync_execution;
113
 
114
/* This is only valid when inferior_ptid is non-zero.
115
 
116
   If this is 0, then exec events should be noticed and responded to
117
   by the debugger (i.e., be reported to the user).
118
 
119
   If this is > 0, then that many subsequent exec events should be
120
   ignored (i.e., not be reported to the user).
121
 */
122
extern int inferior_ignoring_startup_exec_events;
123
 
124
/* This is only valid when inferior_ignoring_startup_exec_events is
125
   zero.
126
 
127
   Some targets (stupidly) report more than one exec event per actual
128
   call to an event() system call.  If only the last such exec event
129
   need actually be noticed and responded to by the debugger (i.e.,
130
   be reported to the user), then this is the number of "leading"
131
   exec events which should be ignored.
132
 */
133
extern int inferior_ignoring_leading_exec_events;
134
 
135
/* Inferior environment. */
136
 
137
extern struct environ *inferior_environ;
138
 
139
extern void clear_proceed_status (void);
140
 
141
extern void proceed (CORE_ADDR, enum target_signal, int);
142
 
143
/* When set, stop the 'step' command if we enter a function which has
144
   no line number information.  The normal behavior is that we step
145
   over such function.  */
146
extern int step_stop_if_no_debug;
147
 
148
extern void kill_inferior (void);
149
 
150
extern void generic_mourn_inferior (void);
151
 
152
extern void terminal_ours (void);
153
 
154
extern int run_stack_dummy (CORE_ADDR, char *);
155
 
156
extern CORE_ADDR read_pc (void);
157
 
158
extern CORE_ADDR read_pc_pid (ptid_t);
159
 
160
extern CORE_ADDR generic_target_read_pc (ptid_t);
161
 
162
extern void write_pc (CORE_ADDR);
163
 
164
extern void write_pc_pid (CORE_ADDR, ptid_t);
165
 
166
extern void generic_target_write_pc (CORE_ADDR, ptid_t);
167
 
168
extern CORE_ADDR read_sp (void);
169
 
170
extern CORE_ADDR generic_target_read_sp (void);
171
 
172
extern void write_sp (CORE_ADDR);
173
 
174
extern void generic_target_write_sp (CORE_ADDR);
175
 
176
extern CORE_ADDR read_fp (void);
177
 
178
extern CORE_ADDR generic_target_read_fp (void);
179
 
180
extern void write_fp (CORE_ADDR);
181
 
182
extern void generic_target_write_fp (CORE_ADDR);
183
 
184
extern CORE_ADDR unsigned_pointer_to_address (struct type *type, void *buf);
185
 
186
extern void unsigned_address_to_pointer (struct type *type, void *buf,
187
                                         CORE_ADDR addr);
188
extern CORE_ADDR signed_pointer_to_address (struct type *type, void *buf);
189
extern void address_to_signed_pointer (struct type *type, void *buf,
190
                                       CORE_ADDR addr);
191
 
192
extern void wait_for_inferior (void);
193
 
194
extern void fetch_inferior_event (void *);
195
 
196
extern void init_wait_for_inferior (void);
197
 
198
extern void close_exec_file (void);
199
 
200
extern void reopen_exec_file (void);
201
 
202
/* The `resume' routine should only be called in special circumstances.
203
   Normally, use `proceed', which handles a lot of bookkeeping.  */
204
 
205
extern void resume (int, enum target_signal);
206
 
207
/* From misc files */
208
 
209
extern void do_registers_info (int, int);
210
 
211
extern void store_inferior_registers (int);
212
 
213
extern void fetch_inferior_registers (int);
214
 
215
extern void solib_create_inferior_hook (void);
216
 
217
extern void child_terminal_info (char *, int);
218
 
219
extern void term_info (char *, int);
220
 
221
extern void terminal_ours_for_output (void);
222
 
223
extern void terminal_inferior (void);
224
 
225
extern void terminal_init_inferior (void);
226
 
227
extern void terminal_init_inferior_with_pgrp (int pgrp);
228
 
229
/* From infptrace.c or infttrace.c */
230
 
231
extern int attach (int);
232
 
233
#if !defined(REQUIRE_ATTACH)
234
#define REQUIRE_ATTACH attach
235
#endif
236
 
237
#if !defined(REQUIRE_DETACH)
238
#define REQUIRE_DETACH(pid,siggnal) detach (siggnal)
239
#endif
240
 
241
extern void detach (int);
242
 
243
/* PTRACE method of waiting for inferior process.  */
244
int ptrace_wait (ptid_t, int *);
245
 
246
extern void child_resume (ptid_t, int, enum target_signal);
247
 
248
#ifndef PTRACE_ARG3_TYPE
249
#define PTRACE_ARG3_TYPE int    /* Correct definition for most systems. */
250
#endif
251
 
252
extern int call_ptrace (int, int, PTRACE_ARG3_TYPE, int);
253
 
254
extern void pre_fork_inferior (void);
255
 
256
/* From procfs.c */
257
 
258
extern int proc_iterate_over_mappings (int (*)(int, CORE_ADDR));
259
 
260
extern ptid_t procfs_first_available (void);
261
 
262
/* From fork-child.c */
263
 
264
extern void fork_inferior (char *, char *, char **,
265
                           void (*)(void),
266
                           void (*)(int), void (*)(void), char *);
267
 
268
 
269
extern void clone_and_follow_inferior (int, int *);
270
 
271
extern void startup_inferior (int);
272
 
273
/* From inflow.c */
274
 
275
extern void new_tty_prefork (char *);
276
 
277
extern int gdb_has_a_terminal (void);
278
 
279
/* From infrun.c */
280
 
281
extern void start_remote (void);
282
 
283
extern void normal_stop (void);
284
 
285
extern int signal_stop_state (int);
286
 
287
extern int signal_print_state (int);
288
 
289
extern int signal_pass_state (int);
290
 
291
extern int signal_stop_update (int, int);
292
 
293
extern int signal_print_update (int, int);
294
 
295
extern int signal_pass_update (int, int);
296
 
297
extern void get_last_target_status(ptid_t *ptid,
298
                                   struct target_waitstatus *status);
299
 
300
/* From infcmd.c */
301
 
302
extern void tty_command (char *, int);
303
 
304
extern void attach_command (char *, int);
305
 
306
extern char *get_inferior_args (void);
307
 
308
extern char *set_inferior_args (char *);
309
 
310
/* Last signal that the inferior received (why it stopped).  */
311
 
312
extern enum target_signal stop_signal;
313
 
314
/* Address at which inferior stopped.  */
315
 
316
extern CORE_ADDR stop_pc;
317
 
318
/* Chain containing status of breakpoint(s) that we have stopped at.  */
319
 
320
extern bpstat stop_bpstat;
321
 
322
/* Flag indicating that a command has proceeded the inferior past the
323
   current breakpoint.  */
324
 
325
extern int breakpoint_proceeded;
326
 
327
/* Nonzero if stopped due to a step command.  */
328
 
329
extern int stop_step;
330
 
331
/* Nonzero if stopped due to completion of a stack dummy routine.  */
332
 
333
extern int stop_stack_dummy;
334
 
335
/* Nonzero if program stopped due to a random (unexpected) signal in
336
   inferior process.  */
337
 
338
extern int stopped_by_random_signal;
339
 
340
/* Range to single step within.
341
   If this is nonzero, respond to a single-step signal
342
   by continuing to step if the pc is in this range.
343
 
344
   If step_range_start and step_range_end are both 1, it means to step for
345
   a single instruction (FIXME: it might clean up wait_for_inferior in a
346
   minor way if this were changed to the address of the instruction and
347
   that address plus one.  But maybe not.).  */
348
 
349
extern CORE_ADDR step_range_start;      /* Inclusive */
350
extern CORE_ADDR step_range_end;        /* Exclusive */
351
 
352
/* Stack frame address as of when stepping command was issued.
353
   This is how we know when we step into a subroutine call,
354
   and how to set the frame for the breakpoint used to step out.  */
355
 
356
extern CORE_ADDR step_frame_address;
357
 
358
/* Our notion of the current stack pointer.  */
359
 
360
extern CORE_ADDR step_sp;
361
 
362
/* 1 means step over all subroutine calls.
363
   -1 means step over calls to undebuggable functions.  */
364
 
365
enum step_over_calls_kind
366
  {
367
    STEP_OVER_NONE,
368
    STEP_OVER_ALL,
369
    STEP_OVER_UNDEBUGGABLE
370
  };
371
 
372
extern enum step_over_calls_kind step_over_calls;
373
 
374
/* If stepping, nonzero means step count is > 1
375
   so don't print frame next time inferior stops
376
   if it stops due to stepping.  */
377
 
378
extern int step_multi;
379
 
380
/* Nonzero means expecting a trap and caller will handle it themselves.
381
   It is used after attach, due to attaching to a process;
382
   when running in the shell before the child program has been exec'd;
383
   and when running some kinds of remote stuff (FIXME?).  */
384
 
385
extern int stop_soon_quietly;
386
 
387
/* Nonzero if proceed is being used for a "finish" command or a similar
388
   situation when stop_registers should be saved.  */
389
 
390
extern int proceed_to_finish;
391
 
392
/* Save register contents here when about to pop a stack dummy frame,
393
   if-and-only-if proceed_to_finish is set.
394
   Thus this contains the return value from the called function (assuming
395
   values are returned in a register).  */
396
 
397
extern char *stop_registers;
398
 
399
/* Nonzero if the child process in inferior_ptid was attached rather
400
   than forked.  */
401
 
402
extern int attach_flag;
403
 
404
/* Sigtramp is a routine that the kernel calls (which then calls the
405
   signal handler).  On most machines it is a library routine that
406
   is linked into the executable.
407
 
408
   This macro, given a program counter value and the name of the
409
   function in which that PC resides (which can be null if the
410
   name is not known), returns nonzero if the PC and name show
411
   that we are in sigtramp.
412
 
413
   On most machines just see if the name is sigtramp (and if we have
414
   no name, assume we are not in sigtramp).  */
415
#if !defined (IN_SIGTRAMP)
416
#if defined (SIGTRAMP_START)
417
#define IN_SIGTRAMP(pc, name) \
418
       ((pc) >= SIGTRAMP_START(pc)   \
419
        && (pc) < SIGTRAMP_END(pc) \
420
        )
421
#else
422
#define IN_SIGTRAMP(pc, name) \
423
       (name && STREQ ("_sigtramp", name))
424
#endif
425
#endif
426
 
427
/* Possible values for CALL_DUMMY_LOCATION.  */
428
#define ON_STACK 1
429
#define BEFORE_TEXT_END 2
430
#define AFTER_TEXT_END 3
431
#define AT_ENTRY_POINT 4
432
 
433
#if !defined (USE_GENERIC_DUMMY_FRAMES)
434
#define USE_GENERIC_DUMMY_FRAMES 0
435
#endif
436
 
437
#if !defined (CALL_DUMMY_LOCATION)
438
#define CALL_DUMMY_LOCATION ON_STACK
439
#endif /* No CALL_DUMMY_LOCATION.  */
440
 
441
#if !defined (CALL_DUMMY_ADDRESS)
442
#define CALL_DUMMY_ADDRESS() (internal_error (__FILE__, __LINE__, "CALL_DUMMY_ADDRESS"), 0)
443
#endif
444
#if !defined (CALL_DUMMY_START_OFFSET)
445
#define CALL_DUMMY_START_OFFSET (internal_error (__FILE__, __LINE__, "CALL_DUMMY_START_OFFSET"), 0)
446
#endif
447
#if !defined (CALL_DUMMY_BREAKPOINT_OFFSET)
448
#define CALL_DUMMY_BREAKPOINT_OFFSET_P (0)
449
#define CALL_DUMMY_BREAKPOINT_OFFSET (internal_error (__FILE__, __LINE__, "CALL_DUMMY_BREAKPOINT_OFFSET"), 0)
450
#endif
451
#if !defined CALL_DUMMY_BREAKPOINT_OFFSET_P
452
#define CALL_DUMMY_BREAKPOINT_OFFSET_P (1)
453
#endif
454
#if !defined (CALL_DUMMY_LENGTH)
455
#define CALL_DUMMY_LENGTH (internal_error (__FILE__, __LINE__, "CALL_DUMMY_LENGTH"), 0)
456
#endif
457
 
458
#if defined (CALL_DUMMY_STACK_ADJUST)
459
#if !defined (CALL_DUMMY_STACK_ADJUST_P)
460
#define CALL_DUMMY_STACK_ADJUST_P (1)
461
#endif
462
#endif
463
#if !defined (CALL_DUMMY_STACK_ADJUST)
464
#define CALL_DUMMY_STACK_ADJUST (internal_error (__FILE__, __LINE__, "CALL_DUMMY_STACK_ADJUST"), 0)
465
#endif
466
#if !defined (CALL_DUMMY_STACK_ADJUST_P)
467
#define CALL_DUMMY_STACK_ADJUST_P (0)
468
#endif
469
 
470
/* FIXME: cagney/2000-04-17: gdbarch should manage this.  The default
471
   shouldn't be necessary. */
472
 
473
#if !defined (CALL_DUMMY_P)
474
#if defined (CALL_DUMMY)
475
#define CALL_DUMMY_P 1
476
#else
477
#define CALL_DUMMY_P 0
478
#endif
479
#endif
480
 
481
#if !defined PUSH_DUMMY_FRAME
482
#define PUSH_DUMMY_FRAME (internal_error (__FILE__, __LINE__, "PUSH_DUMMY_FRAME"), 0)
483
#endif
484
 
485
#if !defined FIX_CALL_DUMMY
486
#define FIX_CALL_DUMMY(a1,a2,a3,a4,a5,a6,a7) (internal_error (__FILE__, __LINE__, "FIX_CALL_DUMMY"), 0)
487
#endif
488
 
489
#if !defined STORE_STRUCT_RETURN
490
#define STORE_STRUCT_RETURN(a1,a2) (internal_error (__FILE__, __LINE__, "STORE_STRUCT_RETURN"), 0)
491
#endif
492
 
493
 
494
/* Are we in a call dummy? */
495
 
496
extern int pc_in_call_dummy_before_text_end (CORE_ADDR pc, CORE_ADDR sp,
497
                                             CORE_ADDR frame_address);
498
#if !GDB_MULTI_ARCH
499
#if !defined (PC_IN_CALL_DUMMY) && CALL_DUMMY_LOCATION == BEFORE_TEXT_END
500
#define PC_IN_CALL_DUMMY(pc, sp, frame_address) pc_in_call_dummy_before_text_end (pc, sp, frame_address)
501
#endif /* Before text_end.  */
502
#endif
503
 
504
extern int pc_in_call_dummy_after_text_end (CORE_ADDR pc, CORE_ADDR sp,
505
                                            CORE_ADDR frame_address);
506
#if !GDB_MULTI_ARCH
507
#if !defined (PC_IN_CALL_DUMMY) && CALL_DUMMY_LOCATION == AFTER_TEXT_END
508
#define PC_IN_CALL_DUMMY(pc, sp, frame_address) pc_in_call_dummy_after_text_end (pc, sp, frame_address)
509
#endif
510
#endif
511
 
512
extern int pc_in_call_dummy_on_stack (CORE_ADDR pc, CORE_ADDR sp,
513
                                      CORE_ADDR frame_address);
514
#if !GDB_MULTI_ARCH
515
#if !defined (PC_IN_CALL_DUMMY) && CALL_DUMMY_LOCATION == ON_STACK
516
#define PC_IN_CALL_DUMMY(pc, sp, frame_address) pc_in_call_dummy_on_stack (pc, sp, frame_address)
517
#endif
518
#endif
519
 
520
extern int pc_in_call_dummy_at_entry_point (CORE_ADDR pc, CORE_ADDR sp,
521
                                            CORE_ADDR frame_address);
522
#if !GDB_MULTI_ARCH
523
#if !defined (PC_IN_CALL_DUMMY) && CALL_DUMMY_LOCATION == AT_ENTRY_POINT
524
#define PC_IN_CALL_DUMMY(pc, sp, frame_address) pc_in_call_dummy_at_entry_point (pc, sp, frame_address)
525
#endif
526
#endif
527
 
528
/* It's often not enough for our clients to know whether the PC is merely
529
   somewhere within the call dummy.  They may need to know whether the
530
   call dummy has actually completed.  (For example, wait_for_inferior
531
   wants to know when it should truly stop because the call dummy has
532
   completed.  If we're single-stepping because of slow watchpoints,
533
   then we may find ourselves stopped at the entry of the call dummy,
534
   and want to continue stepping until we reach the end.)
535
 
536
   Note that this macro is intended for targets (like HP-UX) which
537
   require more than a single breakpoint in their call dummies, and
538
   therefore cannot use the CALL_DUMMY_BREAKPOINT_OFFSET mechanism.
539
 
540
   If a target does define CALL_DUMMY_BREAKPOINT_OFFSET, then this
541
   default implementation of CALL_DUMMY_HAS_COMPLETED is sufficient.
542
   Else, a target may wish to supply an implementation that works in
543
   the presense of multiple breakpoints in its call dummy.
544
 */
545
#if !defined(CALL_DUMMY_HAS_COMPLETED)
546
#define CALL_DUMMY_HAS_COMPLETED(pc, sp, frame_address) \
547
  PC_IN_CALL_DUMMY((pc), (sp), (frame_address))
548
#endif
549
 
550
/* If STARTUP_WITH_SHELL is set, GDB's "run"
551
   will attempts to start up the debugee under a shell.
552
   This is in order for argument-expansion to occur. E.g.,
553
   (gdb) run *
554
   The "*" gets expanded by the shell into a list of files.
555
   While this is a nice feature, it turns out to interact badly
556
   with some of the catch-fork/catch-exec features we have added.
557
   In particular, if the shell does any fork/exec's before
558
   the exec of the target program, that can confuse GDB.
559
   To disable this feature, set STARTUP_WITH_SHELL to 0.
560
   To enable this feature, set STARTUP_WITH_SHELL to 1.
561
   The catch-exec traps expected during start-up will
562
   be 1 if target is not started up with a shell, 2 if it is.
563
   - RT
564
   If you disable this, you need to decrement
565
   START_INFERIOR_TRAPS_EXPECTED in tm.h. */
566
#define STARTUP_WITH_SHELL 1
567
#if !defined(START_INFERIOR_TRAPS_EXPECTED)
568
#define START_INFERIOR_TRAPS_EXPECTED   2
569
#endif
570
#endif /* !defined (INFERIOR_H) */

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