1 /* 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.
6 This file is part of GDB.
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.
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.
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. */
23 #if !defined (INFERIOR_H)
29 #include "breakpoint.h"
31 /* For enum target_signal. */
34 /* Structure in which to save the status of the inferior. Create/Save
35 through "save_inferior_status", restore through
36 "restore_inferior_status".
38 This pair of routines should be called around any transfer of
39 control to the inferior which you don't want showing up in your
42 struct inferior_status;
44 extern struct inferior_status *save_inferior_status (int);
46 extern void restore_inferior_status (struct inferior_status *);
48 extern struct cleanup *make_cleanup_restore_inferior_status (struct inferior_status *);
50 extern void discard_inferior_status (struct inferior_status *);
52 extern void write_inferior_status_register (struct inferior_status
53 *inf_status, int regno,
56 /* The -1 ptid, often used to indicate either an error condition
57 or a "don't care" condition, i.e, "run all threads." */
58 extern ptid_t minus_one_ptid;
60 /* The null or zero ptid, often used to indicate no process. */
61 extern ptid_t null_ptid;
63 /* Attempt to find and return an existing ptid with the given PID, LWP,
64 and TID components. If none exists, create a new one and return
66 ptid_t ptid_build (int pid, long lwp, long tid);
68 /* Find/Create a ptid from just a pid. */
69 ptid_t pid_to_ptid (int pid);
71 /* Fetch the pid (process id) component from a ptid. */
72 int ptid_get_pid (ptid_t ptid);
74 /* Fetch the lwp (lightweight process) component from a ptid. */
75 long ptid_get_lwp (ptid_t ptid);
77 /* Fetch the tid (thread id) component from a ptid. */
78 long ptid_get_tid (ptid_t ptid);
80 /* Compare two ptids to see if they are equal */
81 extern int ptid_equal (ptid_t p1, ptid_t p2);
83 /* Save value of inferior_ptid so that it may be restored by
84 a later call to do_cleanups(). Returns the struct cleanup
85 pointer needed for later doing the cleanup. */
86 extern struct cleanup * save_inferior_ptid (void);
88 extern void set_sigint_trap (void);
90 extern void clear_sigint_trap (void);
92 extern void set_sigio_trap (void);
94 extern void clear_sigio_trap (void);
96 /* File name for default use for standard in/out in the inferior. */
98 extern char *inferior_io_terminal;
100 /* Collected pid, tid, etc. of the debugged inferior. When there's
101 no inferior, PIDGET (inferior_ptid) will be 0. */
103 extern ptid_t inferior_ptid;
105 /* Is the inferior running right now, as a result of a 'run&',
106 'continue&' etc command? This is used in asycn gdb to determine
107 whether a command that the user enters while the target is running
108 is allowed or not. */
109 extern int target_executing;
111 /* Are we simulating synchronous execution? This is used in async gdb
112 to implement the 'run', 'continue' etc commands, which will not
113 redisplay the prompt until the execution is actually over. */
114 extern int sync_execution;
116 /* This is only valid when inferior_ptid is non-zero.
118 If this is 0, then exec events should be noticed and responded to
119 by the debugger (i.e., be reported to the user).
121 If this is > 0, then that many subsequent exec events should be
122 ignored (i.e., not be reported to the user).
124 extern int inferior_ignoring_startup_exec_events;
126 /* This is only valid when inferior_ignoring_startup_exec_events is
129 Some targets (stupidly) report more than one exec event per actual
130 call to an event() system call. If only the last such exec event
131 need actually be noticed and responded to by the debugger (i.e.,
132 be reported to the user), then this is the number of "leading"
133 exec events which should be ignored.
135 extern int inferior_ignoring_leading_exec_events;
137 /* Inferior environment. */
139 extern struct environ *inferior_environ;
141 extern void clear_proceed_status (void);
143 extern void proceed (CORE_ADDR, enum target_signal, int);
145 /* When set, stop the 'step' command if we enter a function which has
146 no line number information. The normal behavior is that we step
147 over such function. */
148 extern int step_stop_if_no_debug;
150 extern void kill_inferior (void);
152 extern void generic_mourn_inferior (void);
154 extern void terminal_ours (void);
156 extern int run_stack_dummy (CORE_ADDR, char *);
158 extern CORE_ADDR read_pc (void);
160 extern CORE_ADDR read_pc_pid (ptid_t);
162 extern CORE_ADDR generic_target_read_pc (ptid_t);
164 extern void write_pc (CORE_ADDR);
166 extern void write_pc_pid (CORE_ADDR, ptid_t);
168 extern void generic_target_write_pc (CORE_ADDR, ptid_t);
170 extern CORE_ADDR read_sp (void);
172 extern CORE_ADDR generic_target_read_sp (void);
174 extern void write_sp (CORE_ADDR);
176 extern void generic_target_write_sp (CORE_ADDR);
178 extern CORE_ADDR read_fp (void);
180 extern CORE_ADDR generic_target_read_fp (void);
182 extern CORE_ADDR unsigned_pointer_to_address (struct type *type, void *buf);
184 extern void unsigned_address_to_pointer (struct type *type, void *buf,
186 extern CORE_ADDR signed_pointer_to_address (struct type *type, void *buf);
187 extern void address_to_signed_pointer (struct type *type, void *buf,
190 extern void wait_for_inferior (void);
192 extern void fetch_inferior_event (void *);
194 extern void init_wait_for_inferior (void);
196 extern void close_exec_file (void);
198 extern void reopen_exec_file (void);
200 /* The `resume' routine should only be called in special circumstances.
201 Normally, use `proceed', which handles a lot of bookkeeping. */
203 extern void resume (int, enum target_signal);
205 /* From misc files */
207 extern void do_registers_info (int, int);
209 extern void store_inferior_registers (int);
211 extern void fetch_inferior_registers (int);
213 extern void solib_create_inferior_hook (void);
215 extern void child_terminal_info (char *, int);
217 extern void term_info (char *, int);
219 extern void terminal_ours_for_output (void);
221 extern void terminal_inferior (void);
223 extern void terminal_init_inferior (void);
225 extern void terminal_init_inferior_with_pgrp (int pgrp);
227 /* From infptrace.c or infttrace.c */
229 extern int attach (int);
231 #if !defined(REQUIRE_ATTACH)
232 #define REQUIRE_ATTACH attach
235 #if !defined(REQUIRE_DETACH)
236 #define REQUIRE_DETACH(pid,siggnal) detach (siggnal)
239 extern void detach (int);
241 /* PTRACE method of waiting for inferior process. */
242 int ptrace_wait (ptid_t, int *);
244 extern void child_resume (ptid_t, int, enum target_signal);
246 #ifndef PTRACE_ARG3_TYPE
247 #define PTRACE_ARG3_TYPE int /* Correct definition for most systems. */
250 extern int call_ptrace (int, int, PTRACE_ARG3_TYPE, int);
252 extern void pre_fork_inferior (void);
256 extern int proc_iterate_over_mappings (int (*)(int, CORE_ADDR));
258 extern ptid_t procfs_first_available (void);
260 /* From fork-child.c */
262 extern void fork_inferior (char *, char *, char **,
264 void (*)(int), void (*)(void), char *);
267 extern void clone_and_follow_inferior (int, int *);
269 extern void startup_inferior (int);
271 extern char *construct_inferior_arguments (struct gdbarch *, int, char **);
275 extern void new_tty_prefork (char *);
277 extern int gdb_has_a_terminal (void);
281 extern void start_remote (void);
283 extern void normal_stop (void);
285 extern int signal_stop_state (int);
287 extern int signal_print_state (int);
289 extern int signal_pass_state (int);
291 extern int signal_stop_update (int, int);
293 extern int signal_print_update (int, int);
295 extern int signal_pass_update (int, int);
297 extern void get_last_target_status(ptid_t *ptid,
298 struct target_waitstatus *status);
302 extern void tty_command (char *, int);
304 extern void attach_command (char *, int);
306 extern char *get_inferior_args (void);
308 extern char *set_inferior_args (char *);
310 extern void set_inferior_args_vector (int, char **);
312 /* Last signal that the inferior received (why it stopped). */
314 extern enum target_signal stop_signal;
316 /* Address at which inferior stopped. */
318 extern CORE_ADDR stop_pc;
320 /* Chain containing status of breakpoint(s) that we have stopped at. */
322 extern bpstat stop_bpstat;
324 /* Flag indicating that a command has proceeded the inferior past the
325 current breakpoint. */
327 extern int breakpoint_proceeded;
329 /* Nonzero if stopped due to a step command. */
331 extern int stop_step;
333 /* Nonzero if stopped due to completion of a stack dummy routine. */
335 extern int stop_stack_dummy;
337 /* Nonzero if program stopped due to a random (unexpected) signal in
340 extern int stopped_by_random_signal;
342 /* Range to single step within.
343 If this is nonzero, respond to a single-step signal
344 by continuing to step if the pc is in this range.
346 If step_range_start and step_range_end are both 1, it means to step for
347 a single instruction (FIXME: it might clean up wait_for_inferior in a
348 minor way if this were changed to the address of the instruction and
349 that address plus one. But maybe not.). */
351 extern CORE_ADDR step_range_start; /* Inclusive */
352 extern CORE_ADDR step_range_end; /* Exclusive */
354 /* Stack frame address as of when stepping command was issued.
355 This is how we know when we step into a subroutine call,
356 and how to set the frame for the breakpoint used to step out. */
358 extern CORE_ADDR step_frame_address;
360 /* Our notion of the current stack pointer. */
362 extern CORE_ADDR step_sp;
364 /* 1 means step over all subroutine calls.
365 -1 means step over calls to undebuggable functions. */
367 enum step_over_calls_kind
371 STEP_OVER_UNDEBUGGABLE
374 extern enum step_over_calls_kind step_over_calls;
376 /* If stepping, nonzero means step count is > 1
377 so don't print frame next time inferior stops
378 if it stops due to stepping. */
380 extern int step_multi;
382 /* Nonzero means expecting a trap and caller will handle it themselves.
383 It is used after attach, due to attaching to a process;
384 when running in the shell before the child program has been exec'd;
385 and when running some kinds of remote stuff (FIXME?). */
387 extern int stop_soon_quietly;
389 /* Nonzero if proceed is being used for a "finish" command or a similar
390 situation when stop_registers should be saved. */
392 extern int proceed_to_finish;
394 /* Save register contents here when about to pop a stack dummy frame,
395 if-and-only-if proceed_to_finish is set.
396 Thus this contains the return value from the called function (assuming
397 values are returned in a register). */
399 extern char *stop_registers;
401 /* Nonzero if the child process in inferior_ptid was attached rather
404 extern int attach_flag;
406 /* Possible values for CALL_DUMMY_LOCATION. */
408 #define BEFORE_TEXT_END 2
409 #define AFTER_TEXT_END 3
410 #define AT_ENTRY_POINT 4
412 #if !defined (USE_GENERIC_DUMMY_FRAMES)
413 #define USE_GENERIC_DUMMY_FRAMES 0
416 #if !defined (CALL_DUMMY_LOCATION)
417 #define CALL_DUMMY_LOCATION ON_STACK
418 #endif /* No CALL_DUMMY_LOCATION. */
420 #if !defined (CALL_DUMMY_ADDRESS)
421 #define CALL_DUMMY_ADDRESS() (internal_error (__FILE__, __LINE__, "CALL_DUMMY_ADDRESS"), 0)
423 #if !defined (CALL_DUMMY_START_OFFSET)
424 #define CALL_DUMMY_START_OFFSET (internal_error (__FILE__, __LINE__, "CALL_DUMMY_START_OFFSET"), 0)
426 #if !defined (CALL_DUMMY_BREAKPOINT_OFFSET)
427 #define CALL_DUMMY_BREAKPOINT_OFFSET_P (0)
428 #define CALL_DUMMY_BREAKPOINT_OFFSET (internal_error (__FILE__, __LINE__, "CALL_DUMMY_BREAKPOINT_OFFSET"), 0)
430 #if !defined CALL_DUMMY_BREAKPOINT_OFFSET_P
431 #define CALL_DUMMY_BREAKPOINT_OFFSET_P (1)
433 #if !defined (CALL_DUMMY_LENGTH)
434 #define CALL_DUMMY_LENGTH (internal_error (__FILE__, __LINE__, "CALL_DUMMY_LENGTH"), 0)
437 #if defined (CALL_DUMMY_STACK_ADJUST)
438 #if !defined (CALL_DUMMY_STACK_ADJUST_P)
439 #define CALL_DUMMY_STACK_ADJUST_P (1)
442 #if !defined (CALL_DUMMY_STACK_ADJUST)
443 #define CALL_DUMMY_STACK_ADJUST (internal_error (__FILE__, __LINE__, "CALL_DUMMY_STACK_ADJUST"), 0)
445 #if !defined (CALL_DUMMY_STACK_ADJUST_P)
446 #define CALL_DUMMY_STACK_ADJUST_P (0)
449 /* FIXME: cagney/2000-04-17: gdbarch should manage this. The default
450 shouldn't be necessary. */
452 #if !defined (CALL_DUMMY_P)
453 #if defined (CALL_DUMMY)
454 #define CALL_DUMMY_P 1
456 #define CALL_DUMMY_P 0
460 #if !defined PUSH_DUMMY_FRAME
461 #define PUSH_DUMMY_FRAME (internal_error (__FILE__, __LINE__, "PUSH_DUMMY_FRAME"), 0)
464 #if !defined FIX_CALL_DUMMY
465 #define FIX_CALL_DUMMY(a1,a2,a3,a4,a5,a6,a7) (internal_error (__FILE__, __LINE__, "FIX_CALL_DUMMY"), 0)
468 #if !defined STORE_STRUCT_RETURN
469 #define STORE_STRUCT_RETURN(a1,a2) (internal_error (__FILE__, __LINE__, "STORE_STRUCT_RETURN"), 0)
473 /* Are we in a call dummy? */
475 extern int pc_in_call_dummy_before_text_end (CORE_ADDR pc, CORE_ADDR sp,
476 CORE_ADDR frame_address);
478 #if !defined (PC_IN_CALL_DUMMY) && CALL_DUMMY_LOCATION == BEFORE_TEXT_END
479 #define PC_IN_CALL_DUMMY(pc, sp, frame_address) pc_in_call_dummy_before_text_end (pc, sp, frame_address)
480 #endif /* Before text_end. */
483 extern int pc_in_call_dummy_after_text_end (CORE_ADDR pc, CORE_ADDR sp,
484 CORE_ADDR frame_address);
486 #if !defined (PC_IN_CALL_DUMMY) && CALL_DUMMY_LOCATION == AFTER_TEXT_END
487 #define PC_IN_CALL_DUMMY(pc, sp, frame_address) pc_in_call_dummy_after_text_end (pc, sp, frame_address)
491 extern int pc_in_call_dummy_on_stack (CORE_ADDR pc, CORE_ADDR sp,
492 CORE_ADDR frame_address);
494 #if !defined (PC_IN_CALL_DUMMY) && CALL_DUMMY_LOCATION == ON_STACK
495 #define PC_IN_CALL_DUMMY(pc, sp, frame_address) pc_in_call_dummy_on_stack (pc, sp, frame_address)
499 extern int pc_in_call_dummy_at_entry_point (CORE_ADDR pc, CORE_ADDR sp,
500 CORE_ADDR frame_address);
502 #if !defined (PC_IN_CALL_DUMMY) && CALL_DUMMY_LOCATION == AT_ENTRY_POINT
503 #define PC_IN_CALL_DUMMY(pc, sp, frame_address) pc_in_call_dummy_at_entry_point (pc, sp, frame_address)
507 /* It's often not enough for our clients to know whether the PC is merely
508 somewhere within the call dummy. They may need to know whether the
509 call dummy has actually completed. (For example, wait_for_inferior
510 wants to know when it should truly stop because the call dummy has
511 completed. If we're single-stepping because of slow watchpoints,
512 then we may find ourselves stopped at the entry of the call dummy,
513 and want to continue stepping until we reach the end.)
515 Note that this macro is intended for targets (like HP-UX) which
516 require more than a single breakpoint in their call dummies, and
517 therefore cannot use the CALL_DUMMY_BREAKPOINT_OFFSET mechanism.
519 If a target does define CALL_DUMMY_BREAKPOINT_OFFSET, then this
520 default implementation of CALL_DUMMY_HAS_COMPLETED is sufficient.
521 Else, a target may wish to supply an implementation that works in
522 the presense of multiple breakpoints in its call dummy.
524 #if !defined(CALL_DUMMY_HAS_COMPLETED)
525 #define CALL_DUMMY_HAS_COMPLETED(pc, sp, frame_address) \
526 PC_IN_CALL_DUMMY((pc), (sp), (frame_address))
529 /* If STARTUP_WITH_SHELL is set, GDB's "run"
530 will attempts to start up the debugee under a shell.
531 This is in order for argument-expansion to occur. E.g.,
533 The "*" gets expanded by the shell into a list of files.
534 While this is a nice feature, it turns out to interact badly
535 with some of the catch-fork/catch-exec features we have added.
536 In particular, if the shell does any fork/exec's before
537 the exec of the target program, that can confuse GDB.
538 To disable this feature, set STARTUP_WITH_SHELL to 0.
539 To enable this feature, set STARTUP_WITH_SHELL to 1.
540 The catch-exec traps expected during start-up will
541 be 1 if target is not started up with a shell, 2 if it is.
543 If you disable this, you need to decrement
544 START_INFERIOR_TRAPS_EXPECTED in tm.h. */
545 #define STARTUP_WITH_SHELL 1
546 #if !defined(START_INFERIOR_TRAPS_EXPECTED)
547 #define START_INFERIOR_TRAPS_EXPECTED 2
549 #endif /* !defined (INFERIOR_H) */