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)
27 #include "breakpoint.h"
29 /* For enum target_signal. */
32 /* Structure in which to save the status of the inferior. Create/Save
33 through "save_inferior_status", restore through
34 "restore_inferior_status".
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
40 struct inferior_status;
42 extern struct inferior_status *save_inferior_status (int);
44 extern void restore_inferior_status (struct inferior_status *);
46 extern struct cleanup *make_cleanup_restore_inferior_status (struct inferior_status *);
48 extern void discard_inferior_status (struct inferior_status *);
50 extern void write_inferior_status_register (struct inferior_status
51 *inf_status, int regno,
54 /* Save value of inferior_ptid so that it may be restored by
55 a later call to do_cleanups(). Returns the struct cleanup
56 pointer needed for later doing the cleanup. */
57 extern struct cleanup * save_inferior_ptid (void);
59 extern void set_sigint_trap (void);
61 extern void clear_sigint_trap (void);
63 extern void set_sigio_trap (void);
65 extern void clear_sigio_trap (void);
67 /* File name for default use for standard in/out in the inferior. */
69 extern char *inferior_io_terminal;
71 /* Collected pid, tid, etc. of the debugged inferior. When there's
72 no inferior, PIDGET (inferior_ptid) will be 0. */
74 extern ptid_t inferior_ptid;
76 /* Is the inferior running right now, as a result of a 'run&',
77 'continue&' etc command? This is used in asycn gdb to determine
78 whether a command that the user enters while the target is running
80 extern int target_executing;
82 /* Are we simulating synchronous execution? This is used in async gdb
83 to implement the 'run', 'continue' etc commands, which will not
84 redisplay the prompt until the execution is actually over. */
85 extern int sync_execution;
87 /* This is only valid when inferior_ptid is non-zero.
89 If this is 0, then exec events should be noticed and responded to
90 by the debugger (i.e., be reported to the user).
92 If this is > 0, then that many subsequent exec events should be
93 ignored (i.e., not be reported to the user).
95 extern int inferior_ignoring_startup_exec_events;
97 /* This is only valid when inferior_ignoring_startup_exec_events is
100 Some targets (stupidly) report more than one exec event per actual
101 call to an event() system call. If only the last such exec event
102 need actually be noticed and responded to by the debugger (i.e.,
103 be reported to the user), then this is the number of "leading"
104 exec events which should be ignored.
106 extern int inferior_ignoring_leading_exec_events;
108 /* Inferior environment. */
110 extern struct environ *inferior_environ;
112 extern void clear_proceed_status (void);
114 extern void proceed (CORE_ADDR, enum target_signal, int);
116 /* When set, stop the 'step' command if we enter a function which has
117 no line number information. The normal behavior is that we step
118 over such function. */
119 extern int step_stop_if_no_debug;
121 extern void kill_inferior (void);
123 extern void generic_mourn_inferior (void);
125 extern void terminal_ours (void);
127 extern int run_stack_dummy (CORE_ADDR, char *);
129 extern CORE_ADDR read_pc (void);
131 extern CORE_ADDR read_pc_pid (ptid_t);
133 extern CORE_ADDR generic_target_read_pc (ptid_t);
135 extern void write_pc (CORE_ADDR);
137 extern void write_pc_pid (CORE_ADDR, ptid_t);
139 extern void generic_target_write_pc (CORE_ADDR, ptid_t);
141 extern CORE_ADDR read_sp (void);
143 extern CORE_ADDR generic_target_read_sp (void);
145 extern void write_sp (CORE_ADDR);
147 extern void generic_target_write_sp (CORE_ADDR);
149 extern CORE_ADDR read_fp (void);
151 extern CORE_ADDR generic_target_read_fp (void);
153 extern void write_fp (CORE_ADDR);
155 extern void generic_target_write_fp (CORE_ADDR);
157 extern CORE_ADDR unsigned_pointer_to_address (struct type *type, void *buf);
159 extern void unsigned_address_to_pointer (struct type *type, void *buf,
161 extern CORE_ADDR signed_pointer_to_address (struct type *type, void *buf);
162 extern void address_to_signed_pointer (struct type *type, void *buf,
165 extern void wait_for_inferior (void);
167 extern void fetch_inferior_event (void *);
169 extern void init_wait_for_inferior (void);
171 extern void close_exec_file (void);
173 extern void reopen_exec_file (void);
175 /* The `resume' routine should only be called in special circumstances.
176 Normally, use `proceed', which handles a lot of bookkeeping. */
178 extern void resume (int, enum target_signal);
180 /* From misc files */
182 extern void do_registers_info (int, int);
184 extern void store_inferior_registers (int);
186 extern void fetch_inferior_registers (int);
188 extern void solib_create_inferior_hook (void);
190 extern void child_terminal_info (char *, int);
192 extern void term_info (char *, int);
194 extern void terminal_ours_for_output (void);
196 extern void terminal_inferior (void);
198 extern void terminal_init_inferior (void);
200 extern void terminal_init_inferior_with_pgrp (int pgrp);
202 /* From infptrace.c or infttrace.c */
204 extern int attach (int);
206 #if !defined(REQUIRE_ATTACH)
207 #define REQUIRE_ATTACH attach
210 #if !defined(REQUIRE_DETACH)
211 #define REQUIRE_DETACH(pid,siggnal) detach (siggnal)
214 extern void detach (int);
216 /* PTRACE method of waiting for inferior process. */
217 int ptrace_wait (ptid_t, int *);
219 extern void child_resume (ptid_t, int, enum target_signal);
221 #ifndef PTRACE_ARG3_TYPE
222 #define PTRACE_ARG3_TYPE int /* Correct definition for most systems. */
225 extern int call_ptrace (int, int, PTRACE_ARG3_TYPE, int);
227 extern void pre_fork_inferior (void);
231 extern int proc_iterate_over_mappings (int (*)(int, CORE_ADDR));
233 extern ptid_t procfs_first_available (void);
235 /* From fork-child.c */
237 extern void fork_inferior (char *, char *, char **,
239 void (*)(int), void (*)(void), char *);
242 extern void clone_and_follow_inferior (int, int *);
244 extern void startup_inferior (int);
248 extern void new_tty_prefork (char *);
250 extern int gdb_has_a_terminal (void);
254 extern void start_remote (void);
256 extern void normal_stop (void);
258 extern int signal_stop_state (int);
260 extern int signal_print_state (int);
262 extern int signal_pass_state (int);
264 extern int signal_stop_update (int, int);
266 extern int signal_print_update (int, int);
268 extern int signal_pass_update (int, int);
270 extern void get_last_target_status(ptid_t *ptid,
271 struct target_waitstatus *status);
275 extern void tty_command (char *, int);
277 extern void attach_command (char *, int);
279 extern char *get_inferior_args (void);
281 extern char *set_inferior_args (char *);
283 /* Last signal that the inferior received (why it stopped). */
285 extern enum target_signal stop_signal;
287 /* Address at which inferior stopped. */
289 extern CORE_ADDR stop_pc;
291 /* Chain containing status of breakpoint(s) that we have stopped at. */
293 extern bpstat stop_bpstat;
295 /* Flag indicating that a command has proceeded the inferior past the
296 current breakpoint. */
298 extern int breakpoint_proceeded;
300 /* Nonzero if stopped due to a step command. */
302 extern int stop_step;
304 /* Nonzero if stopped due to completion of a stack dummy routine. */
306 extern int stop_stack_dummy;
308 /* Nonzero if program stopped due to a random (unexpected) signal in
311 extern int stopped_by_random_signal;
313 /* Range to single step within.
314 If this is nonzero, respond to a single-step signal
315 by continuing to step if the pc is in this range.
317 If step_range_start and step_range_end are both 1, it means to step for
318 a single instruction (FIXME: it might clean up wait_for_inferior in a
319 minor way if this were changed to the address of the instruction and
320 that address plus one. But maybe not.). */
322 extern CORE_ADDR step_range_start; /* Inclusive */
323 extern CORE_ADDR step_range_end; /* Exclusive */
325 /* Stack frame address as of when stepping command was issued.
326 This is how we know when we step into a subroutine call,
327 and how to set the frame for the breakpoint used to step out. */
329 extern CORE_ADDR step_frame_address;
331 /* Our notion of the current stack pointer. */
333 extern CORE_ADDR step_sp;
335 /* 1 means step over all subroutine calls.
336 -1 means step over calls to undebuggable functions. */
338 enum step_over_calls_kind
342 STEP_OVER_UNDEBUGGABLE
345 extern enum step_over_calls_kind step_over_calls;
347 /* If stepping, nonzero means step count is > 1
348 so don't print frame next time inferior stops
349 if it stops due to stepping. */
351 extern int step_multi;
353 /* Nonzero means expecting a trap and caller will handle it themselves.
354 It is used after attach, due to attaching to a process;
355 when running in the shell before the child program has been exec'd;
356 and when running some kinds of remote stuff (FIXME?). */
358 extern int stop_soon_quietly;
360 /* Nonzero if proceed is being used for a "finish" command or a similar
361 situation when stop_registers should be saved. */
363 extern int proceed_to_finish;
365 /* Save register contents here when about to pop a stack dummy frame,
366 if-and-only-if proceed_to_finish is set.
367 Thus this contains the return value from the called function (assuming
368 values are returned in a register). */
370 extern char *stop_registers;
372 /* Nonzero if the child process in inferior_ptid was attached rather
375 extern int attach_flag;
377 /* Sigtramp is a routine that the kernel calls (which then calls the
378 signal handler). On most machines it is a library routine that
379 is linked into the executable.
381 This macro, given a program counter value and the name of the
382 function in which that PC resides (which can be null if the
383 name is not known), returns nonzero if the PC and name show
384 that we are in sigtramp.
386 On most machines just see if the name is sigtramp (and if we have
387 no name, assume we are not in sigtramp). */
388 #if !defined (IN_SIGTRAMP)
389 #if defined (SIGTRAMP_START)
390 #define IN_SIGTRAMP(pc, name) \
391 ((pc) >= SIGTRAMP_START(pc) \
392 && (pc) < SIGTRAMP_END(pc) \
395 #define IN_SIGTRAMP(pc, name) \
396 (name && STREQ ("_sigtramp", name))
400 /* Possible values for CALL_DUMMY_LOCATION. */
402 #define BEFORE_TEXT_END 2
403 #define AFTER_TEXT_END 3
404 #define AT_ENTRY_POINT 4
406 #if !defined (USE_GENERIC_DUMMY_FRAMES)
407 #define USE_GENERIC_DUMMY_FRAMES 0
410 #if !defined (CALL_DUMMY_LOCATION)
411 #define CALL_DUMMY_LOCATION ON_STACK
412 #endif /* No CALL_DUMMY_LOCATION. */
414 #if !defined (CALL_DUMMY_ADDRESS)
415 #define CALL_DUMMY_ADDRESS() (internal_error (__FILE__, __LINE__, "CALL_DUMMY_ADDRESS"), 0)
417 #if !defined (CALL_DUMMY_START_OFFSET)
418 #define CALL_DUMMY_START_OFFSET (internal_error (__FILE__, __LINE__, "CALL_DUMMY_START_OFFSET"), 0)
420 #if !defined (CALL_DUMMY_BREAKPOINT_OFFSET)
421 #define CALL_DUMMY_BREAKPOINT_OFFSET_P (0)
422 #define CALL_DUMMY_BREAKPOINT_OFFSET (internal_error (__FILE__, __LINE__, "CALL_DUMMY_BREAKPOINT_OFFSET"), 0)
424 #if !defined CALL_DUMMY_BREAKPOINT_OFFSET_P
425 #define CALL_DUMMY_BREAKPOINT_OFFSET_P (1)
427 #if !defined (CALL_DUMMY_LENGTH)
428 #define CALL_DUMMY_LENGTH (internal_error (__FILE__, __LINE__, "CALL_DUMMY_LENGTH"), 0)
431 #if defined (CALL_DUMMY_STACK_ADJUST)
432 #if !defined (CALL_DUMMY_STACK_ADJUST_P)
433 #define CALL_DUMMY_STACK_ADJUST_P (1)
436 #if !defined (CALL_DUMMY_STACK_ADJUST)
437 #define CALL_DUMMY_STACK_ADJUST (internal_error (__FILE__, __LINE__, "CALL_DUMMY_STACK_ADJUST"), 0)
439 #if !defined (CALL_DUMMY_STACK_ADJUST_P)
440 #define CALL_DUMMY_STACK_ADJUST_P (0)
443 /* FIXME: cagney/2000-04-17: gdbarch should manage this. The default
444 shouldn't be necessary. */
446 #if !defined (CALL_DUMMY_P)
447 #if defined (CALL_DUMMY)
448 #define CALL_DUMMY_P 1
450 #define CALL_DUMMY_P 0
454 #if !defined PUSH_DUMMY_FRAME
455 #define PUSH_DUMMY_FRAME (internal_error (__FILE__, __LINE__, "PUSH_DUMMY_FRAME"), 0)
458 #if !defined FIX_CALL_DUMMY
459 #define FIX_CALL_DUMMY(a1,a2,a3,a4,a5,a6,a7) (internal_error (__FILE__, __LINE__, "FIX_CALL_DUMMY"), 0)
462 #if !defined STORE_STRUCT_RETURN
463 #define STORE_STRUCT_RETURN(a1,a2) (internal_error (__FILE__, __LINE__, "STORE_STRUCT_RETURN"), 0)
467 /* Are we in a call dummy? */
469 extern int pc_in_call_dummy_before_text_end (CORE_ADDR pc, CORE_ADDR sp,
470 CORE_ADDR frame_address);
472 #if !defined (PC_IN_CALL_DUMMY) && CALL_DUMMY_LOCATION == BEFORE_TEXT_END
473 #define PC_IN_CALL_DUMMY(pc, sp, frame_address) pc_in_call_dummy_before_text_end (pc, sp, frame_address)
474 #endif /* Before text_end. */
477 extern int pc_in_call_dummy_after_text_end (CORE_ADDR pc, CORE_ADDR sp,
478 CORE_ADDR frame_address);
480 #if !defined (PC_IN_CALL_DUMMY) && CALL_DUMMY_LOCATION == AFTER_TEXT_END
481 #define PC_IN_CALL_DUMMY(pc, sp, frame_address) pc_in_call_dummy_after_text_end (pc, sp, frame_address)
485 extern int pc_in_call_dummy_on_stack (CORE_ADDR pc, CORE_ADDR sp,
486 CORE_ADDR frame_address);
488 #if !defined (PC_IN_CALL_DUMMY) && CALL_DUMMY_LOCATION == ON_STACK
489 #define PC_IN_CALL_DUMMY(pc, sp, frame_address) pc_in_call_dummy_on_stack (pc, sp, frame_address)
493 extern int pc_in_call_dummy_at_entry_point (CORE_ADDR pc, CORE_ADDR sp,
494 CORE_ADDR frame_address);
496 #if !defined (PC_IN_CALL_DUMMY) && CALL_DUMMY_LOCATION == AT_ENTRY_POINT
497 #define PC_IN_CALL_DUMMY(pc, sp, frame_address) pc_in_call_dummy_at_entry_point (pc, sp, frame_address)
501 /* It's often not enough for our clients to know whether the PC is merely
502 somewhere within the call dummy. They may need to know whether the
503 call dummy has actually completed. (For example, wait_for_inferior
504 wants to know when it should truly stop because the call dummy has
505 completed. If we're single-stepping because of slow watchpoints,
506 then we may find ourselves stopped at the entry of the call dummy,
507 and want to continue stepping until we reach the end.)
509 Note that this macro is intended for targets (like HP-UX) which
510 require more than a single breakpoint in their call dummies, and
511 therefore cannot use the CALL_DUMMY_BREAKPOINT_OFFSET mechanism.
513 If a target does define CALL_DUMMY_BREAKPOINT_OFFSET, then this
514 default implementation of CALL_DUMMY_HAS_COMPLETED is sufficient.
515 Else, a target may wish to supply an implementation that works in
516 the presense of multiple breakpoints in its call dummy.
518 #if !defined(CALL_DUMMY_HAS_COMPLETED)
519 #define CALL_DUMMY_HAS_COMPLETED(pc, sp, frame_address) \
520 PC_IN_CALL_DUMMY((pc), (sp), (frame_address))
523 /* If STARTUP_WITH_SHELL is set, GDB's "run"
524 will attempts to start up the debugee under a shell.
525 This is in order for argument-expansion to occur. E.g.,
527 The "*" gets expanded by the shell into a list of files.
528 While this is a nice feature, it turns out to interact badly
529 with some of the catch-fork/catch-exec features we have added.
530 In particular, if the shell does any fork/exec's before
531 the exec of the target program, that can confuse GDB.
532 To disable this feature, set STARTUP_WITH_SHELL to 0.
533 To enable this feature, set STARTUP_WITH_SHELL to 1.
534 The catch-exec traps expected during start-up will
535 be 1 if target is not started up with a shell, 2 if it is.
537 If you disable this, you need to decrement
538 START_INFERIOR_TRAPS_EXPECTED in tm.h. */
539 #define STARTUP_WITH_SHELL 1
540 #if !defined(START_INFERIOR_TRAPS_EXPECTED)
541 #define START_INFERIOR_TRAPS_EXPECTED 2
543 #endif /* !defined (INFERIOR_H) */