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, 1989, 1992, 1996, 1998 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
22 #if !defined (INFERIOR_H)
26 #include "breakpoint.h"
28 /* For enum target_signal. */
31 /* Structure in which to save the status of the inferior. Create/Save
32 through "save_inferior_status", restore through
33 "restore_inferior_status".
35 This pair of routines should be called around any transfer of
36 control to the inferior which you don't want showing up in your
39 struct inferior_status;
41 extern struct inferior_status *save_inferior_status PARAMS ((int));
43 extern void restore_inferior_status PARAMS ((struct inferior_status *));
45 extern void discard_inferior_status PARAMS ((struct inferior_status *));
47 extern void write_inferior_status_register PARAMS ((struct inferior_status * inf_status, int regno, LONGEST val));
49 /* This macro gives the number of registers actually in use by the
50 inferior. This may be less than the total number of registers,
51 perhaps depending on the actual CPU in use or program being run. */
54 #define ARCH_NUM_REGS NUM_REGS
57 extern void set_sigint_trap PARAMS ((void));
59 extern void clear_sigint_trap PARAMS ((void));
61 extern void set_sigio_trap PARAMS ((void));
63 extern void clear_sigio_trap PARAMS ((void));
65 /* File name for default use for standard in/out in the inferior. */
67 extern char *inferior_io_terminal;
69 /* Pid of our debugged inferior, or 0 if no inferior now. */
71 extern int inferior_pid;
73 /* Is the inferior running right now, as a result of a 'run&',
74 'continue&' etc command? This is used in asycn gdb to determine
75 whether a command that the user enters while the target is running
77 extern int target_executing;
79 /* Are we simulating synchronous execution? This is used in async gdb
80 to implement the 'run', 'continue' etc commands, which will not
81 redisplay the prompt until the execution is actually over. */
82 extern int sync_execution;
84 /* This is only valid when inferior_pid is non-zero.
86 If this is 0, then exec events should be noticed and responded to
87 by the debugger (i.e., be reported to the user).
89 If this is > 0, then that many subsequent exec events should be
90 ignored (i.e., not be reported to the user).
92 extern int inferior_ignoring_startup_exec_events;
94 /* This is only valid when inferior_ignoring_startup_exec_events is
97 Some targets (stupidly) report more than one exec event per actual
98 call to an event() system call. If only the last such exec event
99 need actually be noticed and responded to by the debugger (i.e.,
100 be reported to the user), then this is the number of "leading"
101 exec events which should be ignored.
103 extern int inferior_ignoring_leading_exec_events;
105 /* Inferior environment. */
107 extern struct environ *inferior_environ;
109 /* Character array containing an image of the inferior programs'
112 extern char *registers;
114 /* Character array containing the current state of each register
115 (unavailable<0, valid=0, invalid>0). */
117 extern signed char *register_valid;
119 extern void clear_proceed_status PARAMS ((void));
121 extern void proceed PARAMS ((CORE_ADDR, enum target_signal, int));
123 extern void kill_inferior PARAMS ((void));
125 extern void generic_mourn_inferior PARAMS ((void));
127 extern void terminal_ours PARAMS ((void));
129 extern int run_stack_dummy PARAMS ((CORE_ADDR, char *));
131 extern CORE_ADDR read_pc PARAMS ((void));
133 extern CORE_ADDR read_pc_pid PARAMS ((int));
135 extern CORE_ADDR generic_target_read_pc PARAMS ((int));
137 extern void write_pc PARAMS ((CORE_ADDR));
139 extern void write_pc_pid PARAMS ((CORE_ADDR, int));
141 extern void generic_target_write_pc PARAMS ((CORE_ADDR, int));
143 extern CORE_ADDR read_sp PARAMS ((void));
145 extern CORE_ADDR generic_target_read_sp PARAMS ((void));
147 extern void write_sp PARAMS ((CORE_ADDR));
149 extern void generic_target_write_sp PARAMS ((CORE_ADDR));
151 extern CORE_ADDR read_fp PARAMS ((void));
153 extern CORE_ADDR generic_target_read_fp PARAMS ((void));
155 extern void write_fp PARAMS ((CORE_ADDR));
157 extern void generic_target_write_fp PARAMS ((CORE_ADDR));
159 extern void wait_for_inferior PARAMS ((void));
161 extern void fetch_inferior_event PARAMS ((void *));
163 extern void init_wait_for_inferior PARAMS ((void));
165 extern void close_exec_file PARAMS ((void));
167 extern void reopen_exec_file PARAMS ((void));
169 /* The `resume' routine should only be called in special circumstances.
170 Normally, use `proceed', which handles a lot of bookkeeping. */
172 extern void resume PARAMS ((int, enum target_signal));
174 /* From misc files */
176 extern void store_inferior_registers PARAMS ((int));
178 extern void fetch_inferior_registers PARAMS ((int));
180 extern void solib_create_inferior_hook PARAMS ((void));
182 extern void child_terminal_info PARAMS ((char *, int));
184 extern void term_info PARAMS ((char *, int));
186 extern void terminal_ours_for_output PARAMS ((void));
188 extern void terminal_inferior PARAMS ((void));
190 extern void terminal_init_inferior PARAMS ((void));
192 extern void terminal_init_inferior_with_pgrp PARAMS ((int pgrp));
194 /* From infptrace.c or infttrace.c */
196 extern int attach PARAMS ((int));
198 #if !defined(REQUIRE_ATTACH)
199 #define REQUIRE_ATTACH attach
202 #if !defined(REQUIRE_DETACH)
203 #define REQUIRE_DETACH(pid,siggnal) detach (siggnal)
206 extern void detach PARAMS ((int));
208 /* PTRACE method of waiting for inferior process. */
209 int ptrace_wait PARAMS ((int, int *));
211 extern void child_resume PARAMS ((int, int, enum target_signal));
213 #ifndef PTRACE_ARG3_TYPE
214 #define PTRACE_ARG3_TYPE int /* Correct definition for most systems. */
217 extern int call_ptrace PARAMS ((int, int, PTRACE_ARG3_TYPE, int));
219 extern void pre_fork_inferior PARAMS ((void));
223 extern int proc_iterate_over_mappings PARAMS ((int (*)(int, CORE_ADDR)));
225 extern int procfs_first_available PARAMS ((void));
227 /* From fork-child.c */
229 extern void fork_inferior PARAMS ((char *, char *, char **,
237 clone_and_follow_inferior PARAMS ((int, int *));
239 extern void startup_inferior PARAMS ((int));
243 extern void new_tty_prefork PARAMS ((char *));
245 extern int gdb_has_a_terminal PARAMS ((void));
249 extern void start_remote PARAMS ((void));
251 extern void normal_stop PARAMS ((void));
253 extern int signal_stop_state PARAMS ((int));
255 extern int signal_print_state PARAMS ((int));
257 extern int signal_pass_state PARAMS ((int));
259 extern int signal_stop_update PARAMS ((int, int));
261 extern int signal_print_update PARAMS ((int, int));
263 extern int signal_pass_update PARAMS ((int, int));
267 extern void tty_command PARAMS ((char *, int));
269 extern void attach_command PARAMS ((char *, int));
271 /* Last signal that the inferior received (why it stopped). */
273 extern enum target_signal stop_signal;
275 /* Address at which inferior stopped. */
277 extern CORE_ADDR stop_pc;
279 /* Chain containing status of breakpoint(s) that we have stopped at. */
281 extern bpstat stop_bpstat;
283 /* Flag indicating that a command has proceeded the inferior past the
284 current breakpoint. */
286 extern int breakpoint_proceeded;
288 /* Nonzero if stopped due to a step command. */
290 extern int stop_step;
292 /* Nonzero if stopped due to completion of a stack dummy routine. */
294 extern int stop_stack_dummy;
296 /* Nonzero if program stopped due to a random (unexpected) signal in
299 extern int stopped_by_random_signal;
301 /* Range to single step within.
302 If this is nonzero, respond to a single-step signal
303 by continuing to step if the pc is in this range.
305 If step_range_start and step_range_end are both 1, it means to step for
306 a single instruction (FIXME: it might clean up wait_for_inferior in a
307 minor way if this were changed to the address of the instruction and
308 that address plus one. But maybe not.). */
310 extern CORE_ADDR step_range_start; /* Inclusive */
311 extern CORE_ADDR step_range_end; /* Exclusive */
313 /* Stack frame address as of when stepping command was issued.
314 This is how we know when we step into a subroutine call,
315 and how to set the frame for the breakpoint used to step out. */
317 extern CORE_ADDR step_frame_address;
319 /* Our notion of the current stack pointer. */
321 extern CORE_ADDR step_sp;
323 /* 1 means step over all subroutine calls.
324 -1 means step over calls to undebuggable functions. */
326 extern int step_over_calls;
328 /* If stepping, nonzero means step count is > 1
329 so don't print frame next time inferior stops
330 if it stops due to stepping. */
332 extern int step_multi;
334 /* Nonzero means expecting a trap and caller will handle it themselves.
335 It is used after attach, due to attaching to a process;
336 when running in the shell before the child program has been exec'd;
337 and when running some kinds of remote stuff (FIXME?). */
339 extern int stop_soon_quietly;
341 /* Nonzero if proceed is being used for a "finish" command or a similar
342 situation when stop_registers should be saved. */
344 extern int proceed_to_finish;
346 /* Save register contents here when about to pop a stack dummy frame,
347 if-and-only-if proceed_to_finish is set.
348 Thus this contains the return value from the called function (assuming
349 values are returned in a register). */
351 extern char *stop_registers;
353 /* Nonzero if the child process in inferior_pid was attached rather
356 extern int attach_flag;
358 /* Sigtramp is a routine that the kernel calls (which then calls the
359 signal handler). On most machines it is a library routine that
360 is linked into the executable.
362 This macro, given a program counter value and the name of the
363 function in which that PC resides (which can be null if the
364 name is not known), returns nonzero if the PC and name show
365 that we are in sigtramp.
367 On most machines just see if the name is sigtramp (and if we have
368 no name, assume we are not in sigtramp). */
369 #if !defined (IN_SIGTRAMP)
370 #if defined (SIGTRAMP_START)
371 #define IN_SIGTRAMP(pc, name) \
372 ((pc) >= SIGTRAMP_START(pc) \
373 && (pc) < SIGTRAMP_END(pc) \
376 #define IN_SIGTRAMP(pc, name) \
377 (name && STREQ ("_sigtramp", name))
381 /* Possible values for CALL_DUMMY_LOCATION. */
383 #define BEFORE_TEXT_END 2
384 #define AFTER_TEXT_END 3
385 #define AT_ENTRY_POINT 4
387 #if !defined (USE_GENERIC_DUMMY_FRAMES)
388 #define USE_GENERIC_DUMMY_FRAMES 0
391 #if !defined (CALL_DUMMY_LOCATION)
392 #define CALL_DUMMY_LOCATION ON_STACK
393 #endif /* No CALL_DUMMY_LOCATION. */
395 #if !defined (CALL_DUMMY_ADDRESS)
396 #define CALL_DUMMY_ADDRESS() (internal_error ("CALL_DUMMY_ADDRESS"), 0)
398 #if !defined (CALL_DUMMY_START_OFFSET)
399 #define CALL_DUMMY_START_OFFSET (internal_error ("CALL_DUMMY_START_OFFSET"), 0)
401 #if !defined (CALL_DUMMY_BREAKPOINT_OFFSET)
402 #define CALL_DUMMY_BREAKPOINT_OFFSET_P (0)
403 #define CALL_DUMMY_BREAKPOINT_OFFSET (internal_error ("CALL_DUMMY_BREAKPOINT_OFFSET"), 0)
405 #if !defined CALL_DUMMY_BREAKPOINT_OFFSET_P
406 #define CALL_DUMMY_BREAKPOINT_OFFSET_P (1)
408 #if !defined (CALL_DUMMY_LENGTH)
409 #define CALL_DUMMY_LENGTH (internal_error ("CALL_DUMMY_LENGTH"), 0)
412 #if defined (CALL_DUMMY_STACK_ADJUST)
413 #if !defined (CALL_DUMMY_STACK_ADJUST_P)
414 #define CALL_DUMMY_STACK_ADJUST_P (1)
417 #if !defined (CALL_DUMMY_STACK_ADJUST)
418 #define CALL_DUMMY_STACK_ADJUST (internal_error ("CALL_DUMMY_STACK_ADJUST"), 0)
420 #if !defined (CALL_DUMMY_STACK_ADJUST_P)
421 #define CALL_DUMMY_STACK_ADJUST_P (0)
424 #if !defined (CALL_DUMMY_P)
425 #if defined (CALL_DUMMY)
426 #define CALL_DUMMY_P 1
428 #define CALL_DUMMY_P 0
432 #if !defined (CALL_DUMMY_WORDS)
433 #if defined (CALL_DUMMY)
434 extern LONGEST call_dummy_words[];
435 #define CALL_DUMMY_WORDS (call_dummy_words)
437 #define CALL_DUMMY_WORDS (internal_error ("CALL_DUMMY_WORDS"), (void*) 0)
441 #if !defined (SIZEOF_CALL_DUMMY_WORDS)
442 #if defined (CALL_DUMMY)
443 extern int sizeof_call_dummy_words;
444 #define SIZEOF_CALL_DUMMY_WORDS (sizeof_call_dummy_words)
446 #define SIZEOF_CALL_DUMMY_WORDS (internal_error ("SIZEOF_CALL_DUMMY_WORDS"), 0)
450 #if !defined PUSH_DUMMY_FRAME
451 #define PUSH_DUMMY_FRAME (internal_error ("PUSH_DUMMY_FRAME"), 0)
454 #if !defined FIX_CALL_DUMMY
455 #define FIX_CALL_DUMMY(a1,a2,a3,a4,a5,a6,a7) (internal_error ("FIX_CALL_DUMMY"), 0)
458 #if !defined STORE_STRUCT_RETURN
459 #define STORE_STRUCT_RETURN(a1,a2) (internal_error ("STORE_STRUCT_RETURN"), 0)
463 /* Are we in a call dummy? */
465 extern int pc_in_call_dummy_before_text_end PARAMS ((CORE_ADDR pc, CORE_ADDR sp, CORE_ADDR frame_address));
467 #if !defined (PC_IN_CALL_DUMMY) && CALL_DUMMY_LOCATION == BEFORE_TEXT_END
468 #define PC_IN_CALL_DUMMY(pc, sp, frame_address) pc_in_call_dummy_before_text_end (pc, sp, frame_address)
469 #endif /* Before text_end. */
472 extern int pc_in_call_dummy_after_text_end PARAMS ((CORE_ADDR pc, CORE_ADDR sp, CORE_ADDR frame_address));
474 #if !defined (PC_IN_CALL_DUMMY) && CALL_DUMMY_LOCATION == AFTER_TEXT_END
475 #define PC_IN_CALL_DUMMY(pc, sp, frame_address) pc_in_call_dummy_after_text_end (pc, sp, frame_address)
479 extern int pc_in_call_dummy_on_stack PARAMS ((CORE_ADDR pc, CORE_ADDR sp, CORE_ADDR frame_address));
481 #if !defined (PC_IN_CALL_DUMMY) && CALL_DUMMY_LOCATION == ON_STACK
482 #define PC_IN_CALL_DUMMY(pc, sp, frame_address) pc_in_call_dummy_on_stack (pc, sp, frame_address)
486 extern int pc_in_call_dummy_at_entry_point PARAMS ((CORE_ADDR pc, CORE_ADDR sp, CORE_ADDR frame_address));
488 #if !defined (PC_IN_CALL_DUMMY) && CALL_DUMMY_LOCATION == AT_ENTRY_POINT
489 #define PC_IN_CALL_DUMMY(pc, sp, frame_address) pc_in_call_dummy_at_entry_point (pc, sp, frame_address)
493 /* It's often not enough for our clients to know whether the PC is merely
494 somewhere within the call dummy. They may need to know whether the
495 call dummy has actually completed. (For example, wait_for_inferior
496 wants to know when it should truly stop because the call dummy has
497 completed. If we're single-stepping because of slow watchpoints,
498 then we may find ourselves stopped at the entry of the call dummy,
499 and want to continue stepping until we reach the end.)
501 Note that this macro is intended for targets (like HP-UX) which
502 require more than a single breakpoint in their call dummies, and
503 therefore cannot use the CALL_DUMMY_BREAKPOINT_OFFSET mechanism.
505 If a target does define CALL_DUMMY_BREAKPOINT_OFFSET, then this
506 default implementation of CALL_DUMMY_HAS_COMPLETED is sufficient.
507 Else, a target may wish to supply an implementation that works in
508 the presense of multiple breakpoints in its call dummy.
510 #if !defined(CALL_DUMMY_HAS_COMPLETED)
511 #define CALL_DUMMY_HAS_COMPLETED(pc, sp, frame_address) \
512 PC_IN_CALL_DUMMY((pc), (sp), (frame_address))
515 /* If STARTUP_WITH_SHELL is set, GDB's "run"
516 will attempts to start up the debugee under a shell.
517 This is in order for argument-expansion to occur. E.g.,
519 The "*" gets expanded by the shell into a list of files.
520 While this is a nice feature, it turns out to interact badly
521 with some of the catch-fork/catch-exec features we have added.
522 In particular, if the shell does any fork/exec's before
523 the exec of the target program, that can confuse GDB.
524 To disable this feature, set STARTUP_WITH_SHELL to 0.
525 To enable this feature, set STARTUP_WITH_SHELL to 1.
526 The catch-exec traps expected during start-up will
527 be 1 if target is not started up with a shell, 2 if it is.
529 If you disable this, you need to decrement
530 START_INFERIOR_TRAPS_EXPECTED in tm.h. */
531 #define STARTUP_WITH_SHELL 1
532 #if !defined(START_INFERIOR_TRAPS_EXPECTED)
533 #define START_INFERIOR_TRAPS_EXPECTED 2
535 #endif /* !defined (INFERIOR_H) */