1 /* Memory-access and commands for "inferior" process, for GDB.
2 Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
3 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003
4 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. */
25 #include "gdb_string.h"
39 #include "completer.h"
41 #include "event-top.h"
42 #include "parser-defs.h"
44 #include "reggroups.h"
48 /* Functions exported for general use, in inferior.h: */
50 void all_registers_info (char *, int);
52 void registers_info (char *, int);
54 void nexti_command (char *, int);
56 void stepi_command (char *, int);
58 void continue_command (char *, int);
60 void interrupt_target_command (char *args
, int from_tty
);
62 /* Local functions: */
64 static void nofp_registers_info (char *, int);
66 static void print_return_value (int struct_return
, struct type
*value_type
);
68 static void finish_command_continuation (struct continuation_arg
*);
70 static void until_next_command (int);
72 static void until_command (char *, int);
74 static void path_info (char *, int);
76 static void path_command (char *, int);
78 static void unset_command (char *, int);
80 static void float_info (char *, int);
82 static void detach_command (char *, int);
84 static void unset_environment_command (char *, int);
86 static void set_environment_command (char *, int);
88 static void environment_info (char *, int);
90 static void program_info (char *, int);
92 static void finish_command (char *, int);
94 static void signal_command (char *, int);
96 static void jump_command (char *, int);
98 static void step_1 (int, int, char *);
99 static void step_once (int skip_subroutines
, int single_inst
, int count
);
100 static void step_1_continuation (struct continuation_arg
*arg
);
102 static void next_command (char *, int);
104 static void step_command (char *, int);
106 static void run_command (char *, int);
108 static void run_no_args_command (char *args
, int from_tty
);
110 static void go_command (char *line_no
, int from_tty
);
112 static int strip_bg_char (char **);
114 void _initialize_infcmd (void);
116 #define GO_USAGE "Usage: go <location>\n"
118 static void breakpoint_auto_delete_contents (void *);
120 #define ERROR_NO_INFERIOR \
121 if (!target_has_execution) error ("The program is not being run.");
123 /* String containing arguments to give to the program, separated by spaces.
124 Empty string (pointer to '\0') means no args. */
126 static char *inferior_args
;
128 /* The inferior arguments as a vector. If INFERIOR_ARGC is nonzero,
129 then we must compute INFERIOR_ARGS from this (via the target). */
131 static int inferior_argc
;
132 static char **inferior_argv
;
134 /* File name for default use for standard in/out in the inferior. */
136 char *inferior_io_terminal
;
138 /* Pid of our debugged inferior, or 0 if no inferior now.
139 Since various parts of infrun.c test this to see whether there is a program
140 being debugged it should be nonzero (currently 3 is used) for remote
143 ptid_t inferior_ptid
;
145 /* Last signal that the inferior received (why it stopped). */
147 enum target_signal stop_signal
;
149 /* Address at which inferior stopped. */
153 /* Chain containing status of breakpoint(s) that we have stopped at. */
157 /* Flag indicating that a command has proceeded the inferior past the
158 current breakpoint. */
160 int breakpoint_proceeded
;
162 /* Nonzero if stopped due to a step command. */
166 /* Nonzero if stopped due to completion of a stack dummy routine. */
168 int stop_stack_dummy
;
170 /* Nonzero if stopped due to a random (unexpected) signal in inferior
173 int stopped_by_random_signal
;
175 /* Range to single step within.
176 If this is nonzero, respond to a single-step signal
177 by continuing to step if the pc is in this range. */
179 CORE_ADDR step_range_start
; /* Inclusive */
180 CORE_ADDR step_range_end
; /* Exclusive */
182 /* Stack frame address as of when stepping command was issued.
183 This is how we know when we step into a subroutine call,
184 and how to set the frame for the breakpoint used to step out. */
186 struct frame_id step_frame_id
;
188 /* Our notion of the current stack pointer. */
192 enum step_over_calls_kind step_over_calls
;
194 /* If stepping, nonzero means step count is > 1
195 so don't print frame next time inferior stops
196 if it stops due to stepping. */
200 /* Environment to use for running inferior,
201 in format described in environ.h. */
203 struct environ
*inferior_environ
;
205 /* Accessor routines. */
208 get_inferior_args (void)
210 if (inferior_argc
!= 0)
214 n
= gdbarch_construct_inferior_arguments (current_gdbarch
,
215 inferior_argc
, inferior_argv
);
216 old
= set_inferior_args (n
);
220 if (inferior_args
== NULL
)
221 inferior_args
= xstrdup ("");
223 return inferior_args
;
227 set_inferior_args (char *newargs
)
229 char *saved_args
= inferior_args
;
231 inferior_args
= newargs
;
239 set_inferior_args_vector (int argc
, char **argv
)
241 inferior_argc
= argc
;
242 inferior_argv
= argv
;
245 /* Notice when `set args' is run. */
247 notice_args_set (char *args
, int from_tty
, struct cmd_list_element
*c
)
253 /* Notice when `show args' is run. */
255 notice_args_read (char *args
, int from_tty
, struct cmd_list_element
*c
)
257 /* Might compute the value. */
258 get_inferior_args ();
262 /* Compute command-line string given argument vector. This does the
263 same shell processing as fork_inferior. */
266 construct_inferior_arguments (struct gdbarch
*gdbarch
, int argc
, char **argv
)
270 if (STARTUP_WITH_SHELL
)
272 /* This holds all the characters considered special to the
273 typical Unix shells. We include `^' because the SunOS
274 /bin/sh treats it as a synonym for `|'. */
275 char *special
= "\"!#$&*()\\|[]{}<>?'\"`~^; \t\n";
280 /* We over-compute the size. It shouldn't matter. */
281 for (i
= 0; i
< argc
; ++i
)
282 length
+= 2 * strlen (argv
[i
]) + 1 + 2 * (argv
[i
][0] == '\0');
284 result
= (char *) xmalloc (length
);
287 for (i
= 0; i
< argc
; ++i
)
292 /* Need to handle empty arguments specially. */
293 if (argv
[i
][0] == '\0')
300 for (cp
= argv
[i
]; *cp
; ++cp
)
302 if (strchr (special
, *cp
) != NULL
)
312 /* In this case we can't handle arguments that contain spaces,
313 tabs, or newlines -- see breakup_args(). */
317 for (i
= 0; i
< argc
; ++i
)
319 char *cp
= strchr (argv
[i
], ' ');
321 cp
= strchr (argv
[i
], '\t');
323 cp
= strchr (argv
[i
], '\n');
325 error ("can't handle command-line argument containing whitespace");
326 length
+= strlen (argv
[i
]) + 1;
329 result
= (char *) xmalloc (length
);
331 for (i
= 0; i
< argc
; ++i
)
334 strcat (result
, " ");
335 strcat (result
, argv
[i
]);
343 /* This function detects whether or not a '&' character (indicating
344 background execution) has been added as *the last* of the arguments ARGS
345 of a command. If it has, it removes it and returns 1. Otherwise it
346 does nothing and returns 0. */
348 strip_bg_char (char **args
)
352 p
= strchr (*args
, '&');
356 if (p
== (*args
+ strlen (*args
) - 1))
358 if (strlen (*args
) > 1)
362 while (*p
== ' ' || *p
== '\t');
375 tty_command (char *file
, int from_tty
)
378 error_no_arg ("terminal name for running target process");
380 inferior_io_terminal
= savestring (file
, strlen (file
));
384 run_command (char *args
, int from_tty
)
390 if (! ptid_equal (inferior_ptid
, null_ptid
) && target_has_execution
)
393 && !query ("The program being debugged has been started already.\n\
394 Start it from the beginning? "))
395 error ("Program not restarted.");
397 #if defined(SOLIB_RESTART)
400 init_wait_for_inferior ();
403 clear_breakpoint_hit_counts ();
405 /* Purge old solib objfiles. */
406 objfile_purge_solibs ();
408 do_run_cleanups (NULL
);
410 /* The comment here used to read, "The exec file is re-read every
411 time we do a generic_mourn_inferior, so we just have to worry
412 about the symbol file." The `generic_mourn_inferior' function
413 gets called whenever the program exits. However, suppose the
414 program exits, and *then* the executable file changes? We need
415 to check again here. Since reopen_exec_file doesn't do anything
416 if the timestamp hasn't changed, I don't see the harm. */
420 exec_file
= (char *) get_exec_file (0);
422 /* We keep symbols from add-symbol-file, on the grounds that the
423 user might want to add some symbols before running the program
424 (right?). But sometimes (dynamic loading where the user manually
425 introduces the new symbols with add-symbol-file), the code which
426 the symbols describe does not persist between runs. Currently
427 the user has to manually nuke all symbols between runs if they
428 want them to go away (PR 2207). This is probably reasonable. */
432 if (event_loop_p
&& target_can_async_p ())
433 async_disable_stdin ();
437 int async_exec
= strip_bg_char (&args
);
439 /* If we get a request for running in the bg but the target
440 doesn't support it, error out. */
441 if (event_loop_p
&& async_exec
&& !target_can_async_p ())
442 error ("Asynchronous execution not supported on this target.");
444 /* If we don't get a request of running in the bg, then we need
445 to simulate synchronous (fg) execution. */
446 if (event_loop_p
&& !async_exec
&& target_can_async_p ())
448 /* Simulate synchronous execution */
449 async_disable_stdin ();
452 /* If there were other args, beside '&', process them. */
455 char *old_args
= set_inferior_args (xstrdup (args
));
462 ui_out_field_string (uiout
, NULL
, "Starting program");
463 ui_out_text (uiout
, ": ");
465 ui_out_field_string (uiout
, "execfile", exec_file
);
466 ui_out_spaces (uiout
, 1);
467 /* We call get_inferior_args() because we might need to compute
469 ui_out_field_string (uiout
, "infargs", get_inferior_args ());
470 ui_out_text (uiout
, "\n");
471 ui_out_flush (uiout
);
474 /* We call get_inferior_args() because we might need to compute
476 target_create_inferior (exec_file
, get_inferior_args (),
477 environ_vector (inferior_environ
));
482 run_no_args_command (char *args
, int from_tty
)
484 char *old_args
= set_inferior_args (xstrdup (""));
490 continue_command (char *proc_count_exp
, int from_tty
)
495 /* Find out whether we must run in the background. */
496 if (proc_count_exp
!= NULL
)
497 async_exec
= strip_bg_char (&proc_count_exp
);
499 /* If we must run in the background, but the target can't do it,
501 if (event_loop_p
&& async_exec
&& !target_can_async_p ())
502 error ("Asynchronous execution not supported on this target.");
504 /* If we are not asked to run in the bg, then prepare to run in the
505 foreground, synchronously. */
506 if (event_loop_p
&& !async_exec
&& target_can_async_p ())
508 /* Simulate synchronous execution */
509 async_disable_stdin ();
512 /* If have argument (besides '&'), set proceed count of breakpoint
514 if (proc_count_exp
!= NULL
)
516 bpstat bs
= stop_bpstat
;
517 int num
= bpstat_num (&bs
);
518 if (num
== 0 && from_tty
)
521 ("Not stopped at any breakpoint; argument ignored.\n");
525 set_ignore_count (num
,
526 parse_and_eval_long (proc_count_exp
) - 1,
528 /* set_ignore_count prints a message ending with a period.
529 So print two spaces before "Continuing.". */
531 printf_filtered (" ");
532 num
= bpstat_num (&bs
);
537 printf_filtered ("Continuing.\n");
539 clear_proceed_status ();
541 proceed ((CORE_ADDR
) -1, TARGET_SIGNAL_DEFAULT
, 0);
544 /* Step until outside of current statement. */
548 step_command (char *count_string
, int from_tty
)
550 step_1 (0, 0, count_string
);
553 /* Likewise, but skip over subroutine calls as if single instructions. */
557 next_command (char *count_string
, int from_tty
)
559 step_1 (1, 0, count_string
);
562 /* Likewise, but step only one instruction. */
566 stepi_command (char *count_string
, int from_tty
)
568 step_1 (0, 1, count_string
);
573 nexti_command (char *count_string
, int from_tty
)
575 step_1 (1, 1, count_string
);
579 disable_longjmp_breakpoint_cleanup (void *ignore
)
581 disable_longjmp_breakpoint ();
585 step_1 (int skip_subroutines
, int single_inst
, char *count_string
)
587 register int count
= 1;
588 struct frame_info
*frame
;
589 struct cleanup
*cleanups
= 0;
595 async_exec
= strip_bg_char (&count_string
);
597 /* If we get a request for running in the bg but the target
598 doesn't support it, error out. */
599 if (event_loop_p
&& async_exec
&& !target_can_async_p ())
600 error ("Asynchronous execution not supported on this target.");
602 /* If we don't get a request of running in the bg, then we need
603 to simulate synchronous (fg) execution. */
604 if (event_loop_p
&& !async_exec
&& target_can_async_p ())
606 /* Simulate synchronous execution */
607 async_disable_stdin ();
610 count
= count_string
? parse_and_eval_long (count_string
) : 1;
612 if (!single_inst
|| skip_subroutines
) /* leave si command alone */
614 enable_longjmp_breakpoint ();
615 if (!event_loop_p
|| !target_can_async_p ())
616 cleanups
= make_cleanup (disable_longjmp_breakpoint_cleanup
, 0 /*ignore*/);
618 make_exec_cleanup (disable_longjmp_breakpoint_cleanup
, 0 /*ignore*/);
621 /* In synchronous case, all is well, just use the regular for loop. */
622 if (!event_loop_p
|| !target_can_async_p ())
624 for (; count
> 0; count
--)
626 clear_proceed_status ();
628 frame
= get_current_frame ();
629 if (!frame
) /* Avoid coredump here. Why tho? */
630 error ("No current frame");
631 step_frame_id
= get_frame_id (frame
);
632 step_sp
= read_sp ();
636 find_pc_line_pc_range (stop_pc
, &step_range_start
, &step_range_end
);
637 if (step_range_end
== 0)
640 if (find_pc_partial_function (stop_pc
, &name
, &step_range_start
,
641 &step_range_end
) == 0)
642 error ("Cannot find bounds of current function");
644 target_terminal_ours ();
646 Single stepping until exit from function %s, \n\
647 which has no line number information.\n", name
);
652 /* Say we are stepping, but stop after one insn whatever it does. */
653 step_range_start
= step_range_end
= 1;
654 if (!skip_subroutines
)
656 Don't step over function calls, not even to functions lacking
658 step_over_calls
= STEP_OVER_NONE
;
661 if (skip_subroutines
)
662 step_over_calls
= STEP_OVER_ALL
;
664 step_multi
= (count
> 1);
665 proceed ((CORE_ADDR
) -1, TARGET_SIGNAL_DEFAULT
, 1);
670 /* FIXME: On nexti, this may have already been done (when we hit the
671 step resume break, I think). Probably this should be moved to
672 wait_for_inferior (near the top). */
673 #if defined (SHIFT_INST_REGS)
678 if (!single_inst
|| skip_subroutines
)
679 do_cleanups (cleanups
);
682 /* In case of asynchronous target things get complicated, do only
683 one step for now, before returning control to the event loop. Let
684 the continuation figure out how many other steps we need to do,
685 and handle them one at the time, through step_once(). */
688 if (event_loop_p
&& target_can_async_p ())
689 step_once (skip_subroutines
, single_inst
, count
);
693 /* Called after we are done with one step operation, to check whether
694 we need to step again, before we print the prompt and return control
695 to the user. If count is > 1, we will need to do one more call to
696 proceed(), via step_once(). Basically it is like step_once and
697 step_1_continuation are co-recursive. */
699 step_1_continuation (struct continuation_arg
*arg
)
702 int skip_subroutines
;
705 skip_subroutines
= arg
->data
.integer
;
706 single_inst
= arg
->next
->data
.integer
;
707 count
= arg
->next
->next
->data
.integer
;
711 /* FIXME: On nexti, this may have already been done (when we hit the
712 step resume break, I think). Probably this should be moved to
713 wait_for_inferior (near the top). */
714 #if defined (SHIFT_INST_REGS)
717 step_once (skip_subroutines
, single_inst
, count
- 1);
720 if (!single_inst
|| skip_subroutines
)
721 do_exec_cleanups (ALL_CLEANUPS
);
724 /* Do just one step operation. If count >1 we will have to set up a
725 continuation to be done after the target stops (after this one
726 step). This is useful to implement the 'step n' kind of commands, in
727 case of asynchronous targets. We had to split step_1 into two parts,
728 one to be done before proceed() and one afterwards. This function is
729 called in case of step n with n>1, after the first step operation has
732 step_once (int skip_subroutines
, int single_inst
, int count
)
734 struct continuation_arg
*arg1
;
735 struct continuation_arg
*arg2
;
736 struct continuation_arg
*arg3
;
737 struct frame_info
*frame
;
741 clear_proceed_status ();
743 frame
= get_current_frame ();
744 if (!frame
) /* Avoid coredump here. Why tho? */
745 error ("No current frame");
746 step_frame_id
= get_frame_id (frame
);
747 step_sp
= read_sp ();
751 find_pc_line_pc_range (stop_pc
, &step_range_start
, &step_range_end
);
753 /* If we have no line info, switch to stepi mode. */
754 if (step_range_end
== 0 && step_stop_if_no_debug
)
756 step_range_start
= step_range_end
= 1;
758 else if (step_range_end
== 0)
761 if (find_pc_partial_function (stop_pc
, &name
, &step_range_start
,
762 &step_range_end
) == 0)
763 error ("Cannot find bounds of current function");
765 target_terminal_ours ();
767 Single stepping until exit from function %s, \n\
768 which has no line number information.\n", name
);
773 /* Say we are stepping, but stop after one insn whatever it does. */
774 step_range_start
= step_range_end
= 1;
775 if (!skip_subroutines
)
777 Don't step over function calls, not even to functions lacking
779 step_over_calls
= STEP_OVER_NONE
;
782 if (skip_subroutines
)
783 step_over_calls
= STEP_OVER_ALL
;
785 step_multi
= (count
> 1);
787 (struct continuation_arg
*) xmalloc (sizeof (struct continuation_arg
));
789 (struct continuation_arg
*) xmalloc (sizeof (struct continuation_arg
));
791 (struct continuation_arg
*) xmalloc (sizeof (struct continuation_arg
));
793 arg1
->data
.integer
= skip_subroutines
;
795 arg2
->data
.integer
= single_inst
;
797 arg3
->data
.integer
= count
;
798 add_intermediate_continuation (step_1_continuation
, arg1
);
799 proceed ((CORE_ADDR
) -1, TARGET_SIGNAL_DEFAULT
, 1);
804 /* Continue program at specified address. */
807 jump_command (char *arg
, int from_tty
)
809 register CORE_ADDR addr
;
810 struct symtabs_and_lines sals
;
811 struct symtab_and_line sal
;
818 /* Find out whether we must run in the background. */
820 async_exec
= strip_bg_char (&arg
);
822 /* If we must run in the background, but the target can't do it,
824 if (event_loop_p
&& async_exec
&& !target_can_async_p ())
825 error ("Asynchronous execution not supported on this target.");
827 /* If we are not asked to run in the bg, then prepare to run in the
828 foreground, synchronously. */
829 if (event_loop_p
&& !async_exec
&& target_can_async_p ())
831 /* Simulate synchronous execution */
832 async_disable_stdin ();
836 error_no_arg ("starting address");
838 sals
= decode_line_spec_1 (arg
, 1);
841 error ("Unreasonable jump request");
847 if (sal
.symtab
== 0 && sal
.pc
== 0)
848 error ("No source file has been specified.");
850 resolve_sal_pc (&sal
); /* May error out */
852 /* See if we are trying to jump to another function. */
853 fn
= get_frame_function (get_current_frame ());
854 sfn
= find_pc_function (sal
.pc
);
855 if (fn
!= NULL
&& sfn
!= fn
)
857 if (!query ("Line %d is not in `%s'. Jump anyway? ", sal
.line
,
858 SYMBOL_PRINT_NAME (fn
)))
860 error ("Not confirmed.");
867 fixup_symbol_section (sfn
, 0);
868 if (section_is_overlay (SYMBOL_BFD_SECTION (sfn
)) &&
869 !section_is_mapped (SYMBOL_BFD_SECTION (sfn
)))
871 if (!query ("WARNING!!! Destination is in unmapped overlay! Jump anyway? "))
873 error ("Not confirmed.");
883 printf_filtered ("Continuing at ");
884 print_address_numeric (addr
, 1, gdb_stdout
);
885 printf_filtered (".\n");
888 clear_proceed_status ();
889 proceed (addr
, TARGET_SIGNAL_0
, 0);
893 /* Go to line or address in current procedure */
895 go_command (char *line_no
, int from_tty
)
897 if (line_no
== (char *) NULL
|| !*line_no
)
898 printf_filtered (GO_USAGE
);
901 tbreak_command (line_no
, from_tty
);
902 jump_command (line_no
, from_tty
);
907 /* Continue program giving it specified signal. */
910 signal_command (char *signum_exp
, int from_tty
)
912 enum target_signal oursig
;
914 dont_repeat (); /* Too dangerous. */
918 error_no_arg ("signal number");
920 /* It would be even slicker to make signal names be valid expressions,
921 (the type could be "enum $signal" or some such), then the user could
922 assign them to convenience variables. */
923 oursig
= target_signal_from_name (signum_exp
);
925 if (oursig
== TARGET_SIGNAL_UNKNOWN
)
927 /* No, try numeric. */
928 int num
= parse_and_eval_long (signum_exp
);
931 oursig
= TARGET_SIGNAL_0
;
933 oursig
= target_signal_from_command (num
);
938 if (oursig
== TARGET_SIGNAL_0
)
939 printf_filtered ("Continuing with no signal.\n");
941 printf_filtered ("Continuing with signal %s.\n",
942 target_signal_to_name (oursig
));
945 clear_proceed_status ();
946 /* "signal 0" should not get stuck if we are stopped at a breakpoint.
947 FIXME: Neither should "signal foo" but when I tried passing
948 (CORE_ADDR)-1 unconditionally I got a testsuite failure which I haven't
949 tried to track down yet. */
950 proceed (oursig
== TARGET_SIGNAL_0
? (CORE_ADDR
) -1 : stop_pc
, oursig
, 0);
953 /* Call breakpoint_auto_delete on the current contents of the bpstat
954 pointed to by arg (which is really a bpstat *). */
957 breakpoint_auto_delete_contents (void *arg
)
959 breakpoint_auto_delete (*(bpstat
*) arg
);
963 /* Execute a "stack dummy", a piece of code stored in the stack
964 by the debugger to be executed in the inferior.
966 To call: first, do PUSH_DUMMY_FRAME.
967 Then push the contents of the dummy. It should end with a breakpoint insn.
968 Then call here, passing address at which to start the dummy.
970 The contents of all registers are saved before the dummy frame is popped
971 and copied into the buffer BUFFER.
973 The dummy's frame is automatically popped whenever that break is hit.
974 If that is the first time the program stops, run_stack_dummy
975 returns to its caller with that frame already gone and returns 0.
977 Otherwise, run_stack-dummy returns a non-zero value.
978 If the called function receives a random signal, we do not allow the user
979 to continue executing it as this may not work. The dummy frame is poped
981 If we hit a breakpoint, we leave the frame in place and return 2 (the frame
982 will eventually be popped when we do hit the dummy end breakpoint). */
985 run_stack_dummy (CORE_ADDR addr
, struct regcache
*buffer
)
987 struct cleanup
*old_cleanups
= make_cleanup (null_cleanup
, 0);
990 /* Now proceed, having reached the desired place. */
991 clear_proceed_status ();
993 if (CALL_DUMMY_BREAKPOINT_OFFSET_P
)
995 struct breakpoint
*bpt
;
996 struct symtab_and_line sal
;
998 init_sal (&sal
); /* initialize to zeroes */
999 if (CALL_DUMMY_LOCATION
== AT_ENTRY_POINT
)
1001 sal
.pc
= CALL_DUMMY_ADDRESS ();
1005 /* If defined, CALL_DUMMY_BREAKPOINT_OFFSET is where we need
1006 to put a breakpoint instruction. If not, the call dummy
1007 already has the breakpoint instruction in it.
1009 ADDR IS THE ADDRESS of the call dummy plus the
1010 CALL_DUMMY_START_OFFSET, so we need to subtract the
1011 CALL_DUMMY_START_OFFSET. */
1012 sal
.pc
= addr
- CALL_DUMMY_START_OFFSET
+ CALL_DUMMY_BREAKPOINT_OFFSET
;
1014 sal
.section
= find_pc_overlay (sal
.pc
);
1017 /* Set up a frame ID for the dummy frame so we can pass it to
1018 set_momentary_breakpoint. We need to give the breakpoint a
1019 frame ID so that the breakpoint code can correctly
1020 re-identify the dummy breakpoint. */
1021 struct frame_id frame
= frame_id_build (read_fp (), sal
.pc
);
1022 /* Create a momentary breakpoint at the return address of the
1023 inferior. That way it breaks when it returns. */
1024 bpt
= set_momentary_breakpoint (sal
, frame
, bp_call_dummy
);
1025 bpt
->disposition
= disp_del
;
1028 /* If all error()s out of proceed ended up calling normal_stop (and
1029 perhaps they should; it already does in the special case of error
1030 out of resume()), then we wouldn't need this. */
1031 make_cleanup (breakpoint_auto_delete_contents
, &stop_bpstat
);
1034 disable_watchpoints_before_interactive_call_start ();
1035 proceed_to_finish
= 1; /* We want stop_registers, please... */
1037 if (target_can_async_p ())
1038 saved_async
= target_async_mask (0);
1040 proceed (addr
, TARGET_SIGNAL_0
, 0);
1043 target_async_mask (saved_async
);
1045 enable_watchpoints_after_interactive_call_stop ();
1047 discard_cleanups (old_cleanups
);
1049 /* We can stop during an inferior call because a signal is received. */
1050 if (stopped_by_random_signal
)
1053 /* We may also stop prematurely because we hit a breakpoint in the
1055 if (!stop_stack_dummy
)
1058 /* On normal return, the stack dummy has been popped already. */
1059 regcache_cpy_no_passthrough (buffer
, stop_registers
);
1063 /* Proceed until we reach a different source line with pc greater than
1064 our current one or exit the function. We skip calls in both cases.
1066 Note that eventually this command should probably be changed so
1067 that only source lines are printed out when we hit the breakpoint
1068 we set. This may involve changes to wait_for_inferior and the
1069 proceed status code. */
1073 until_next_command (int from_tty
)
1075 struct frame_info
*frame
;
1077 struct symbol
*func
;
1078 struct symtab_and_line sal
;
1080 clear_proceed_status ();
1082 frame
= get_current_frame ();
1084 /* Step until either exited from this function or greater
1085 than the current line (if in symbolic section) or pc (if
1089 func
= find_pc_function (pc
);
1093 struct minimal_symbol
*msymbol
= lookup_minimal_symbol_by_pc (pc
);
1095 if (msymbol
== NULL
)
1096 error ("Execution is not within a known function.");
1098 step_range_start
= SYMBOL_VALUE_ADDRESS (msymbol
);
1099 step_range_end
= pc
;
1103 sal
= find_pc_line (pc
, 0);
1105 step_range_start
= BLOCK_START (SYMBOL_BLOCK_VALUE (func
));
1106 step_range_end
= sal
.end
;
1109 step_over_calls
= STEP_OVER_ALL
;
1110 step_frame_id
= get_frame_id (frame
);
1111 step_sp
= read_sp ();
1113 step_multi
= 0; /* Only one call to proceed */
1115 proceed ((CORE_ADDR
) -1, TARGET_SIGNAL_DEFAULT
, 1);
1119 until_command (char *arg
, int from_tty
)
1123 if (!target_has_execution
)
1124 error ("The program is not running.");
1126 /* Find out whether we must run in the background. */
1128 async_exec
= strip_bg_char (&arg
);
1130 /* If we must run in the background, but the target can't do it,
1132 if (event_loop_p
&& async_exec
&& !target_can_async_p ())
1133 error ("Asynchronous execution not supported on this target.");
1135 /* If we are not asked to run in the bg, then prepare to run in the
1136 foreground, synchronously. */
1137 if (event_loop_p
&& !async_exec
&& target_can_async_p ())
1139 /* Simulate synchronous execution */
1140 async_disable_stdin ();
1144 until_break_command (arg
, from_tty
, 0);
1146 until_next_command (from_tty
);
1150 advance_command (char *arg
, int from_tty
)
1154 if (!target_has_execution
)
1155 error ("The program is not running.");
1158 error_no_arg ("a location");
1160 /* Find out whether we must run in the background. */
1162 async_exec
= strip_bg_char (&arg
);
1164 /* If we must run in the background, but the target can't do it,
1166 if (event_loop_p
&& async_exec
&& !target_can_async_p ())
1167 error ("Asynchronous execution not supported on this target.");
1169 /* If we are not asked to run in the bg, then prepare to run in the
1170 foreground, synchronously. */
1171 if (event_loop_p
&& !async_exec
&& target_can_async_p ())
1173 /* Simulate synchronous execution. */
1174 async_disable_stdin ();
1177 until_break_command (arg
, from_tty
, 1);
1181 /* Print the result of a function at the end of a 'finish' command. */
1183 print_return_value (int structure_return
, struct type
*value_type
)
1185 struct value
*value
;
1186 static struct ui_stream
*stb
= NULL
;
1188 if (!structure_return
)
1190 value
= value_being_returned (value_type
, stop_registers
, structure_return
);
1191 stb
= ui_out_stream_new (uiout
);
1192 ui_out_text (uiout
, "Value returned is ");
1193 ui_out_field_fmt (uiout
, "gdb-result-var", "$%d", record_latest_value (value
));
1194 ui_out_text (uiout
, " = ");
1195 value_print (value
, stb
->stream
, 0, Val_no_prettyprint
);
1196 ui_out_field_stream (uiout
, "return-value", stb
);
1197 ui_out_text (uiout
, "\n");
1201 /* We cannot determine the contents of the structure because
1202 it is on the stack, and we don't know where, since we did not
1203 initiate the call, as opposed to the call_function_by_hand case */
1204 #ifdef VALUE_RETURNED_FROM_STACK
1206 ui_out_text (uiout
, "Value returned has type: ");
1207 ui_out_field_string (uiout
, "return-type", TYPE_NAME (value_type
));
1208 ui_out_text (uiout
, ".");
1209 ui_out_text (uiout
, " Cannot determine contents\n");
1211 value
= value_being_returned (value_type
, stop_registers
, structure_return
);
1212 stb
= ui_out_stream_new (uiout
);
1213 ui_out_text (uiout
, "Value returned is ");
1214 ui_out_field_fmt (uiout
, "gdb-result-var", "$%d", record_latest_value (value
));
1215 ui_out_text (uiout
, " = ");
1216 value_print (value
, stb
->stream
, 0, Val_no_prettyprint
);
1217 ui_out_field_stream (uiout
, "return-value", stb
);
1218 ui_out_text (uiout
, "\n");
1223 /* Stuff that needs to be done by the finish command after the target
1224 has stopped. In asynchronous mode, we wait for the target to stop in
1225 the call to poll or select in the event loop, so it is impossible to
1226 do all the stuff as part of the finish_command function itself. The
1227 only chance we have to complete this command is in
1228 fetch_inferior_event, which is called by the event loop as soon as it
1229 detects that the target has stopped. This function is called via the
1230 cmd_continuation pointer. */
1232 finish_command_continuation (struct continuation_arg
*arg
)
1234 register struct symbol
*function
;
1235 struct breakpoint
*breakpoint
;
1236 struct cleanup
*cleanups
;
1238 breakpoint
= (struct breakpoint
*) arg
->data
.pointer
;
1239 function
= (struct symbol
*) arg
->next
->data
.pointer
;
1240 cleanups
= (struct cleanup
*) arg
->next
->next
->data
.pointer
;
1242 if (bpstat_find_breakpoint (stop_bpstat
, breakpoint
) != NULL
1245 struct type
*value_type
;
1249 value_type
= TYPE_TARGET_TYPE (SYMBOL_TYPE (function
));
1251 internal_error (__FILE__
, __LINE__
,
1252 "finish_command: function has no target type");
1254 if (TYPE_CODE (value_type
) == TYPE_CODE_VOID
)
1256 do_exec_cleanups (cleanups
);
1260 funcaddr
= BLOCK_START (SYMBOL_BLOCK_VALUE (function
));
1262 struct_return
= using_struct_return (value_of_variable (function
, NULL
),
1264 check_typedef (value_type
),
1265 BLOCK_GCC_COMPILED (SYMBOL_BLOCK_VALUE (function
)));
1267 print_return_value (struct_return
, value_type
);
1269 do_exec_cleanups (cleanups
);
1272 /* "finish": Set a temporary breakpoint at the place
1273 the selected frame will return to, then continue. */
1276 finish_command (char *arg
, int from_tty
)
1278 struct symtab_and_line sal
;
1279 register struct frame_info
*frame
;
1280 register struct symbol
*function
;
1281 struct breakpoint
*breakpoint
;
1282 struct cleanup
*old_chain
;
1283 struct continuation_arg
*arg1
, *arg2
, *arg3
;
1287 /* Find out whether we must run in the background. */
1289 async_exec
= strip_bg_char (&arg
);
1291 /* If we must run in the background, but the target can't do it,
1293 if (event_loop_p
&& async_exec
&& !target_can_async_p ())
1294 error ("Asynchronous execution not supported on this target.");
1296 /* If we are not asked to run in the bg, then prepare to run in the
1297 foreground, synchronously. */
1298 if (event_loop_p
&& !async_exec
&& target_can_async_p ())
1300 /* Simulate synchronous execution */
1301 async_disable_stdin ();
1305 error ("The \"finish\" command does not take any arguments.");
1306 if (!target_has_execution
)
1307 error ("The program is not running.");
1308 if (deprecated_selected_frame
== NULL
)
1309 error ("No selected frame.");
1311 frame
= get_prev_frame (deprecated_selected_frame
);
1313 error ("\"finish\" not meaningful in the outermost frame.");
1315 clear_proceed_status ();
1317 sal
= find_pc_line (get_frame_pc (frame
), 0);
1318 sal
.pc
= get_frame_pc (frame
);
1320 breakpoint
= set_momentary_breakpoint (sal
, get_frame_id (frame
), bp_finish
);
1322 if (!event_loop_p
|| !target_can_async_p ())
1323 old_chain
= make_cleanup_delete_breakpoint (breakpoint
);
1325 old_chain
= make_exec_cleanup_delete_breakpoint (breakpoint
);
1327 /* Find the function we will return from. */
1329 function
= find_pc_function (get_frame_pc (deprecated_selected_frame
));
1331 /* Print info on the selected frame, including level number
1335 printf_filtered ("Run till exit from ");
1336 print_stack_frame (deprecated_selected_frame
,
1337 frame_relative_level (deprecated_selected_frame
), 0);
1340 /* If running asynchronously and the target support asynchronous
1341 execution, set things up for the rest of the finish command to be
1342 completed later on, when gdb has detected that the target has
1343 stopped, in fetch_inferior_event. */
1344 if (event_loop_p
&& target_can_async_p ())
1347 (struct continuation_arg
*) xmalloc (sizeof (struct continuation_arg
));
1349 (struct continuation_arg
*) xmalloc (sizeof (struct continuation_arg
));
1351 (struct continuation_arg
*) xmalloc (sizeof (struct continuation_arg
));
1355 arg1
->data
.pointer
= breakpoint
;
1356 arg2
->data
.pointer
= function
;
1357 arg3
->data
.pointer
= old_chain
;
1358 add_continuation (finish_command_continuation
, arg1
);
1361 proceed_to_finish
= 1; /* We want stop_registers, please... */
1362 proceed ((CORE_ADDR
) -1, TARGET_SIGNAL_DEFAULT
, 0);
1364 /* Do this only if not running asynchronously or if the target
1365 cannot do async execution. Otherwise, complete this command when
1366 the target actually stops, in fetch_inferior_event. */
1367 if (!event_loop_p
|| !target_can_async_p ())
1370 /* Did we stop at our breakpoint? */
1371 if (bpstat_find_breakpoint (stop_bpstat
, breakpoint
) != NULL
1374 struct type
*value_type
;
1378 value_type
= TYPE_TARGET_TYPE (SYMBOL_TYPE (function
));
1380 internal_error (__FILE__
, __LINE__
,
1381 "finish_command: function has no target type");
1383 /* FIXME: Shouldn't we do the cleanups before returning? */
1384 if (TYPE_CODE (value_type
) == TYPE_CODE_VOID
)
1387 funcaddr
= BLOCK_START (SYMBOL_BLOCK_VALUE (function
));
1390 using_struct_return (value_of_variable (function
, NULL
),
1392 check_typedef (value_type
),
1393 BLOCK_GCC_COMPILED (SYMBOL_BLOCK_VALUE (function
)));
1395 print_return_value (struct_return
, value_type
);
1397 do_cleanups (old_chain
);
1403 program_info (char *args
, int from_tty
)
1405 bpstat bs
= stop_bpstat
;
1406 int num
= bpstat_num (&bs
);
1408 if (!target_has_execution
)
1410 printf_filtered ("The program being debugged is not being run.\n");
1414 target_files_info ();
1415 printf_filtered ("Program stopped at %s.\n",
1416 local_hex_string ((unsigned long) stop_pc
));
1418 printf_filtered ("It stopped after being stepped.\n");
1421 /* There may be several breakpoints in the same place, so this
1422 isn't as strange as it seems. */
1427 printf_filtered ("It stopped at a breakpoint that has ");
1428 printf_filtered ("since been deleted.\n");
1431 printf_filtered ("It stopped at breakpoint %d.\n", num
);
1432 num
= bpstat_num (&bs
);
1435 else if (stop_signal
!= TARGET_SIGNAL_0
)
1437 printf_filtered ("It stopped with signal %s, %s.\n",
1438 target_signal_to_name (stop_signal
),
1439 target_signal_to_string (stop_signal
));
1444 printf_filtered ("Type \"info stack\" or \"info registers\" ");
1445 printf_filtered ("for more information.\n");
1450 environment_info (char *var
, int from_tty
)
1454 register char *val
= get_in_environ (inferior_environ
, var
);
1457 puts_filtered (var
);
1458 puts_filtered (" = ");
1459 puts_filtered (val
);
1460 puts_filtered ("\n");
1464 puts_filtered ("Environment variable \"");
1465 puts_filtered (var
);
1466 puts_filtered ("\" not defined.\n");
1471 register char **vector
= environ_vector (inferior_environ
);
1474 puts_filtered (*vector
++);
1475 puts_filtered ("\n");
1481 set_environment_command (char *arg
, int from_tty
)
1483 register char *p
, *val
, *var
;
1487 error_no_arg ("environment variable and value");
1489 /* Find seperation between variable name and value */
1490 p
= (char *) strchr (arg
, '=');
1491 val
= (char *) strchr (arg
, ' ');
1493 if (p
!= 0 && val
!= 0)
1495 /* We have both a space and an equals. If the space is before the
1496 equals, walk forward over the spaces til we see a nonspace
1497 (possibly the equals). */
1502 /* Now if the = is after the char following the spaces,
1503 take the char following the spaces. */
1507 else if (val
!= 0 && p
== 0)
1511 error_no_arg ("environment variable to set");
1513 if (p
== 0 || p
[1] == 0)
1517 p
= arg
+ strlen (arg
); /* So that savestring below will work */
1521 /* Not setting variable value to null */
1523 while (*val
== ' ' || *val
== '\t')
1527 while (p
!= arg
&& (p
[-1] == ' ' || p
[-1] == '\t'))
1530 var
= savestring (arg
, p
- arg
);
1533 printf_filtered ("Setting environment variable ");
1534 printf_filtered ("\"%s\" to null value.\n", var
);
1535 set_in_environ (inferior_environ
, var
, "");
1538 set_in_environ (inferior_environ
, var
, val
);
1543 unset_environment_command (char *var
, int from_tty
)
1547 /* If there is no argument, delete all environment variables.
1548 Ask for confirmation if reading from the terminal. */
1549 if (!from_tty
|| query ("Delete all environment variables? "))
1551 free_environ (inferior_environ
);
1552 inferior_environ
= make_environ ();
1556 unset_in_environ (inferior_environ
, var
);
1559 /* Handle the execution path (PATH variable) */
1561 static const char path_var_name
[] = "PATH";
1565 path_info (char *args
, int from_tty
)
1567 puts_filtered ("Executable and object file path: ");
1568 puts_filtered (get_in_environ (inferior_environ
, path_var_name
));
1569 puts_filtered ("\n");
1572 /* Add zero or more directories to the front of the execution path. */
1575 path_command (char *dirname
, int from_tty
)
1580 env
= get_in_environ (inferior_environ
, path_var_name
);
1581 /* Can be null if path is not set */
1584 exec_path
= xstrdup (env
);
1585 mod_path (dirname
, &exec_path
);
1586 set_in_environ (inferior_environ
, path_var_name
, exec_path
);
1589 path_info ((char *) NULL
, from_tty
);
1593 #ifdef REGISTER_NAMES
1594 char *gdb_register_names
[] = REGISTER_NAMES
;
1596 /* Print out the machine register regnum. If regnum is -1, print all
1597 registers (print_all == 1) or all non-float and non-vector
1598 registers (print_all == 0).
1600 For most machines, having all_registers_info() print the
1601 register(s) one per line is good enough. If a different format is
1602 required, (eg, for MIPS or Pyramid 90x, which both have lots of
1603 regs), or there is an existing convention for showing all the
1604 registers, define the architecture method PRINT_REGISTERS_INFO to
1605 provide that format. */
1608 default_print_registers_info (struct gdbarch
*gdbarch
,
1609 struct ui_file
*file
,
1610 struct frame_info
*frame
,
1611 int regnum
, int print_all
)
1614 const int numregs
= NUM_REGS
+ NUM_PSEUDO_REGS
;
1615 char *raw_buffer
= alloca (MAX_REGISTER_RAW_SIZE
);
1616 char *virtual_buffer
= alloca (MAX_REGISTER_VIRTUAL_SIZE
);
1618 if (DEPRECATED_DO_REGISTERS_INFO_P ())
1620 DEPRECATED_DO_REGISTERS_INFO (regnum
, print_all
);
1624 for (i
= 0; i
< numregs
; i
++)
1626 /* Decide between printing all regs, non-float / vector regs, or
1632 if (!gdbarch_register_reggroup_p (gdbarch
, i
, all_reggroup
))
1637 if (!gdbarch_register_reggroup_p (gdbarch
, i
, general_reggroup
))
1647 /* If the register name is empty, it is undefined for this
1648 processor, so don't display anything. */
1649 if (REGISTER_NAME (i
) == NULL
|| *(REGISTER_NAME (i
)) == '\0')
1652 fputs_filtered (REGISTER_NAME (i
), file
);
1653 print_spaces_filtered (15 - strlen (REGISTER_NAME (i
)), file
);
1655 /* Get the data in raw format. */
1656 if (! frame_register_read (frame
, i
, raw_buffer
))
1658 fprintf_filtered (file
, "*value not available*\n");
1662 /* FIXME: cagney/2002-08-03: This code shouldn't be necessary.
1663 The function frame_register_read() should have returned the
1664 pre-cooked register so no conversion is necessary. */
1665 /* Convert raw data to virtual format if necessary. */
1666 if (REGISTER_CONVERTIBLE (i
))
1668 REGISTER_CONVERT_TO_VIRTUAL (i
, register_type (current_gdbarch
, i
),
1669 raw_buffer
, virtual_buffer
);
1673 memcpy (virtual_buffer
, raw_buffer
,
1674 REGISTER_VIRTUAL_SIZE (i
));
1677 /* If virtual format is floating, print it that way, and in raw
1679 if (TYPE_CODE (register_type (current_gdbarch
, i
)) == TYPE_CODE_FLT
)
1683 val_print (register_type (current_gdbarch
, i
), virtual_buffer
, 0, 0,
1684 file
, 0, 1, 0, Val_pretty_default
);
1686 fprintf_filtered (file
, "\t(raw 0x");
1687 for (j
= 0; j
< REGISTER_RAW_SIZE (i
); j
++)
1690 if (TARGET_BYTE_ORDER
== BFD_ENDIAN_BIG
)
1693 idx
= REGISTER_RAW_SIZE (i
) - 1 - j
;
1694 fprintf_filtered (file
, "%02x", (unsigned char) raw_buffer
[idx
]);
1696 fprintf_filtered (file
, ")");
1700 /* Print the register in hex. */
1701 val_print (register_type (current_gdbarch
, i
), virtual_buffer
, 0, 0,
1702 file
, 'x', 1, 0, Val_pretty_default
);
1703 /* If not a vector register, print it also according to its
1705 if (TYPE_VECTOR (register_type (current_gdbarch
, i
)) == 0)
1707 fprintf_filtered (file
, "\t");
1708 val_print (register_type (current_gdbarch
, i
), virtual_buffer
, 0, 0,
1709 file
, 0, 1, 0, Val_pretty_default
);
1713 fprintf_filtered (file
, "\n");
1718 registers_info (char *addr_exp
, int fpregs
)
1720 int regnum
, numregs
;
1723 if (!target_has_registers
)
1724 error ("The program has no registers now.");
1725 if (deprecated_selected_frame
== NULL
)
1726 error ("No selected frame.");
1730 gdbarch_print_registers_info (current_gdbarch
, gdb_stdout
,
1731 deprecated_selected_frame
, -1, fpregs
);
1735 while (*addr_exp
!= '\0')
1740 /* Keep skipping leading white space. */
1741 if (isspace ((*addr_exp
)))
1747 /* Discard any leading ``$''. Check that there is something
1748 resembling a register following it. */
1749 if (addr_exp
[0] == '$')
1751 if (isspace ((*addr_exp
)) || (*addr_exp
) == '\0')
1752 error ("Missing register name");
1754 /* Find the start/end of this register name/num/group. */
1756 while ((*addr_exp
) != '\0' && !isspace ((*addr_exp
)))
1760 /* Figure out what we've found and display it. */
1762 /* A register name? */
1764 int regnum
= frame_map_name_to_regnum (start
, end
- start
);
1767 gdbarch_print_registers_info (current_gdbarch
, gdb_stdout
,
1768 deprecated_selected_frame
, regnum
, fpregs
);
1773 /* A register number? (how portable is this one?). */
1776 int regnum
= strtol (start
, &endptr
, 0);
1779 && regnum
< NUM_REGS
+ NUM_PSEUDO_REGS
)
1781 gdbarch_print_registers_info (current_gdbarch
, gdb_stdout
,
1782 deprecated_selected_frame
, regnum
, fpregs
);
1787 /* A register group? */
1789 struct reggroup
*const *group
;
1790 for (group
= reggroups (current_gdbarch
);
1794 /* Don't bother with a length check. Should the user
1795 enter a short register group name, go with the first
1796 group that matches. */
1797 if (strncmp (start
, reggroup_name ((*group
)), end
- start
) == 0)
1800 if ((*group
) != NULL
)
1803 for (regnum
= 0; regnum
< NUM_REGS
+ NUM_PSEUDO_REGS
; regnum
++)
1805 if (gdbarch_register_reggroup_p (current_gdbarch
, regnum
,
1807 gdbarch_print_registers_info (current_gdbarch
,
1808 gdb_stdout
, deprecated_selected_frame
,
1815 /* Nothing matched. */
1816 error ("Invalid register `%.*s'", (int) (end
- start
), start
);
1821 all_registers_info (char *addr_exp
, int from_tty
)
1823 registers_info (addr_exp
, 1);
1827 nofp_registers_info (char *addr_exp
, int from_tty
)
1829 registers_info (addr_exp
, 0);
1833 print_vector_info (struct gdbarch
*gdbarch
, struct ui_file
*file
,
1834 struct frame_info
*frame
, const char *args
)
1836 if (!target_has_registers
)
1837 error ("The program has no registers now.");
1838 if (deprecated_selected_frame
== NULL
)
1839 error ("No selected frame.");
1841 if (gdbarch_print_vector_info_p (gdbarch
))
1842 gdbarch_print_vector_info (gdbarch
, file
, frame
, args
);
1846 int printed_something
= 0;
1848 for (regnum
= 0; regnum
< NUM_REGS
+ NUM_PSEUDO_REGS
; regnum
++)
1850 if (gdbarch_register_reggroup_p (gdbarch
, regnum
, vector_reggroup
))
1852 printed_something
= 1;
1853 gdbarch_print_registers_info (gdbarch
, file
, frame
, regnum
, 1);
1856 if (!printed_something
)
1857 fprintf_filtered (file
, "No vector information\n");
1862 vector_info (char *args
, int from_tty
)
1864 print_vector_info (current_gdbarch
, gdb_stdout
, deprecated_selected_frame
, args
);
1870 * Should save/restore the tty state since it might be that the
1871 * program to be debugged was started on this tty and it wants
1872 * the tty in some state other than what we want. If it's running
1873 * on another terminal or without a terminal, then saving and
1874 * restoring the tty state is a harmless no-op.
1875 * This only needs to be done if we are attaching to a process.
1880 takes a program started up outside of gdb and ``attaches'' to it.
1881 This stops it cold in its tracks and allows us to start debugging it.
1882 and wait for the trace-trap that results from attaching. */
1885 attach_command (char *args
, int from_tty
)
1888 char *full_exec_path
= NULL
;
1890 dont_repeat (); /* Not for the faint of heart */
1892 if (target_has_execution
)
1894 if (query ("A program is being debugged already. Kill it? "))
1897 error ("Not killed.");
1900 target_attach (args
, from_tty
);
1902 /* Set up the "saved terminal modes" of the inferior
1903 based on what modes we are starting it with. */
1904 target_terminal_init ();
1906 /* Install inferior's terminal modes. */
1907 target_terminal_inferior ();
1909 /* Set up execution context to know that we should return from
1910 wait_for_inferior as soon as the target reports a stop. */
1911 init_wait_for_inferior ();
1912 clear_proceed_status ();
1914 /* No traps are generated when attaching to inferior under Mach 3
1916 #ifndef ATTACH_NO_WAIT
1917 stop_soon_quietly
= 1;
1918 wait_for_inferior ();
1922 * If no exec file is yet known, try to determine it from the
1925 exec_file
= (char *) get_exec_file (0);
1928 exec_file
= target_pid_to_exec_file (PIDGET (inferior_ptid
));
1931 /* It's possible we don't have a full path, but rather just a
1932 filename. Some targets, such as HP-UX, don't provide the
1935 Attempt to qualify the filename against the source path.
1936 (If that fails, we'll just fall back on the original
1937 filename. Not much more we can do...)
1939 if (!source_full_path_of (exec_file
, &full_exec_path
))
1940 full_exec_path
= savestring (exec_file
, strlen (exec_file
));
1942 exec_file_attach (full_exec_path
, from_tty
);
1943 symbol_file_add_main (full_exec_path
, from_tty
);
1948 /* Add shared library symbols from the newly attached process, if any. */
1949 SOLIB_ADD ((char *) 0, from_tty
, ¤t_target
, auto_solib_add
);
1950 re_enable_breakpoints_in_shlibs ();
1953 /* Take any necessary post-attaching actions for this platform.
1955 target_post_attach (PIDGET (inferior_ptid
));
1965 * takes a program previously attached to and detaches it.
1966 * The program resumes execution and will no longer stop
1967 * on signals, etc. We better not have left any breakpoints
1968 * in the program or it'll die when it hits one. For this
1969 * to work, it may be necessary for the process to have been
1970 * previously attached. It *might* work if the program was
1971 * started via the normal ptrace (PTRACE_TRACEME).
1975 detach_command (char *args
, int from_tty
)
1977 dont_repeat (); /* Not for the faint of heart */
1978 target_detach (args
, from_tty
);
1979 #if defined(SOLIB_RESTART)
1986 /* Stop the execution of the target while running in async mode, in
1989 interrupt_target_command (char *args
, int from_tty
)
1991 if (event_loop_p
&& target_can_async_p ())
1993 dont_repeat (); /* Not for the faint of heart */
2000 print_float_info (struct gdbarch
*gdbarch
, struct ui_file
*file
,
2001 struct frame_info
*frame
, const char *args
)
2003 if (!target_has_registers
)
2004 error ("The program has no registers now.");
2005 if (deprecated_selected_frame
== NULL
)
2006 error ("No selected frame.");
2008 if (gdbarch_print_float_info_p (gdbarch
))
2009 gdbarch_print_float_info (gdbarch
, file
, frame
, args
);
2013 int printed_something
= 0;
2015 for (regnum
= 0; regnum
< NUM_REGS
+ NUM_PSEUDO_REGS
; regnum
++)
2017 if (gdbarch_register_reggroup_p (gdbarch
, regnum
, float_reggroup
))
2019 printed_something
= 1;
2020 gdbarch_print_registers_info (gdbarch
, file
, frame
, regnum
, 1);
2023 if (!printed_something
)
2024 fprintf_filtered (file
, "\
2025 No floating-point info available for this processor.\n");
2030 float_info (char *args
, int from_tty
)
2032 print_float_info (current_gdbarch
, gdb_stdout
, deprecated_selected_frame
, args
);
2037 unset_command (char *args
, int from_tty
)
2039 printf_filtered ("\"unset\" must be followed by the name of ");
2040 printf_filtered ("an unset subcommand.\n");
2041 help_list (unsetlist
, "unset ", -1, gdb_stdout
);
2045 _initialize_infcmd (void)
2047 struct cmd_list_element
*c
;
2049 c
= add_com ("tty", class_run
, tty_command
,
2050 "Set terminal for future runs of program being debugged.");
2051 set_cmd_completer (c
, filename_completer
);
2053 c
= add_set_cmd ("args", class_run
, var_string_noescape
,
2054 (char *) &inferior_args
,
2055 "Set argument list to give program being debugged when it is started.\n\
2056 Follow this command with any number of args, to be passed to the program.",
2058 set_cmd_completer (c
, filename_completer
);
2059 set_cmd_sfunc (c
, notice_args_set
);
2060 c
= add_show_from_set (c
, &showlist
);
2061 set_cmd_sfunc (c
, notice_args_read
);
2064 ("environment", no_class
, environment_info
,
2065 "The environment to give the program, or one variable's value.\n\
2066 With an argument VAR, prints the value of environment variable VAR to\n\
2067 give the program being debugged. With no arguments, prints the entire\n\
2068 environment to be given to the program.", &showlist
);
2069 set_cmd_completer (c
, noop_completer
);
2071 add_prefix_cmd ("unset", no_class
, unset_command
,
2072 "Complement to certain \"set\" commands.",
2073 &unsetlist
, "unset ", 0, &cmdlist
);
2075 c
= add_cmd ("environment", class_run
, unset_environment_command
,
2076 "Cancel environment variable VAR for the program.\n\
2077 This does not affect the program until the next \"run\" command.",
2079 set_cmd_completer (c
, noop_completer
);
2081 c
= add_cmd ("environment", class_run
, set_environment_command
,
2082 "Set environment variable value to give the program.\n\
2083 Arguments are VAR VALUE where VAR is variable name and VALUE is value.\n\
2084 VALUES of environment variables are uninterpreted strings.\n\
2085 This does not affect the program until the next \"run\" command.",
2087 set_cmd_completer (c
, noop_completer
);
2089 c
= add_com ("path", class_files
, path_command
,
2090 "Add directory DIR(s) to beginning of search path for object files.\n\
2091 $cwd in the path means the current working directory.\n\
2092 This path is equivalent to the $PATH shell variable. It is a list of\n\
2093 directories, separated by colons. These directories are searched to find\n\
2094 fully linked executable files and separately compiled object files as needed.");
2095 set_cmd_completer (c
, filename_completer
);
2097 c
= add_cmd ("paths", no_class
, path_info
,
2098 "Current search path for finding object files.\n\
2099 $cwd in the path means the current working directory.\n\
2100 This path is equivalent to the $PATH shell variable. It is a list of\n\
2101 directories, separated by colons. These directories are searched to find\n\
2102 fully linked executable files and separately compiled object files as needed.",
2104 set_cmd_completer (c
, noop_completer
);
2106 add_com ("attach", class_run
, attach_command
,
2107 "Attach to a process or file outside of GDB.\n\
2108 This command attaches to another target, of the same type as your last\n\
2109 \"target\" command (\"info files\" will show your target stack).\n\
2110 The command may take as argument a process id or a device file.\n\
2111 For a process id, you must have permission to send the process a signal,\n\
2112 and it must have the same effective uid as the debugger.\n\
2113 When using \"attach\" with a process id, the debugger finds the\n\
2114 program running in the process, looking first in the current working\n\
2115 directory, or (if not found there) using the source file search path\n\
2116 (see the \"directory\" command). You can also use the \"file\" command\n\
2117 to specify the program, and to load its symbol table.");
2119 add_com ("detach", class_run
, detach_command
,
2120 "Detach a process or file previously attached.\n\
2121 If a process, it is no longer traced, and it continues its execution. If\n\
2122 you were debugging a file, the file is closed and gdb no longer accesses it.");
2124 add_com ("signal", class_run
, signal_command
,
2125 "Continue program giving it signal specified by the argument.\n\
2126 An argument of \"0\" means continue program without giving it a signal.");
2128 add_com ("stepi", class_run
, stepi_command
,
2129 "Step one instruction exactly.\n\
2130 Argument N means do this N times (or till program stops for another reason).");
2131 add_com_alias ("si", "stepi", class_alias
, 0);
2133 add_com ("nexti", class_run
, nexti_command
,
2134 "Step one instruction, but proceed through subroutine calls.\n\
2135 Argument N means do this N times (or till program stops for another reason).");
2136 add_com_alias ("ni", "nexti", class_alias
, 0);
2138 add_com ("finish", class_run
, finish_command
,
2139 "Execute until selected stack frame returns.\n\
2140 Upon return, the value returned is printed and put in the value history.");
2142 add_com ("next", class_run
, next_command
,
2143 "Step program, proceeding through subroutine calls.\n\
2144 Like the \"step\" command as long as subroutine calls do not happen;\n\
2145 when they do, the call is treated as one instruction.\n\
2146 Argument N means do this N times (or till program stops for another reason).");
2147 add_com_alias ("n", "next", class_run
, 1);
2149 add_com_alias ("S", "next", class_run
, 1);
2151 add_com ("step", class_run
, step_command
,
2152 "Step program until it reaches a different source line.\n\
2153 Argument N means do this N times (or till program stops for another reason).");
2154 add_com_alias ("s", "step", class_run
, 1);
2156 c
= add_com ("until", class_run
, until_command
,
2157 "Execute until the program reaches a source line greater than the current\n\
2158 or a specified location (same args as break command) within the current frame.");
2159 set_cmd_completer (c
, location_completer
);
2160 add_com_alias ("u", "until", class_run
, 1);
2162 c
= add_com ("advance", class_run
, advance_command
,
2163 "Continue the program up to the given location (same form as args for break command).\n\
2164 Execution will also stop upon exit from the current stack frame.");
2165 set_cmd_completer (c
, location_completer
);
2167 c
= add_com ("jump", class_run
, jump_command
,
2168 "Continue program being debugged at specified line or address.\n\
2169 Give as argument either LINENUM or *ADDR, where ADDR is an expression\n\
2170 for an address to start at.");
2171 set_cmd_completer (c
, location_completer
);
2175 c
= add_com ("go", class_run
, go_command
,
2176 "Usage: go <location>\n\
2177 Continue program being debugged, stopping at specified line or \n\
2179 Give as argument either LINENUM or *ADDR, where ADDR is an \n\
2180 expression for an address to start at.\n\
2181 This command is a combination of tbreak and jump.");
2182 set_cmd_completer (c
, location_completer
);
2186 add_com_alias ("g", "go", class_run
, 1);
2188 add_com ("continue", class_run
, continue_command
,
2189 "Continue program being debugged, after signal or breakpoint.\n\
2190 If proceeding from breakpoint, a number N may be used as an argument,\n\
2191 which means to set the ignore count of that breakpoint to N - 1 (so that\n\
2192 the breakpoint won't break until the Nth time it is reached).");
2193 add_com_alias ("c", "cont", class_run
, 1);
2194 add_com_alias ("fg", "cont", class_run
, 1);
2196 c
= add_com ("run", class_run
, run_command
,
2197 "Start debugged program. You may specify arguments to give it.\n\
2198 Args may include \"*\", or \"[...]\"; they are expanded using \"sh\".\n\
2199 Input and output redirection with \">\", \"<\", or \">>\" are also allowed.\n\n\
2200 With no arguments, uses arguments last specified (with \"run\" or \"set args\").\n\
2201 To cancel previous arguments and run with no arguments,\n\
2202 use \"set args\" without arguments.");
2203 set_cmd_completer (c
, filename_completer
);
2204 add_com_alias ("r", "run", class_run
, 1);
2206 add_com ("R", class_run
, run_no_args_command
,
2207 "Start debugged program with no arguments.");
2209 add_com ("interrupt", class_run
, interrupt_target_command
,
2210 "Interrupt the execution of the debugged program.");
2212 add_info ("registers", nofp_registers_info
,
2213 "List of integer registers and their contents, for selected stack frame.\n\
2214 Register name as argument means describe only that register.");
2215 add_info_alias ("r", "registers", 1);
2218 add_com ("lr", class_info
, nofp_registers_info
,
2219 "List of integer registers and their contents, for selected stack frame.\n\
2220 Register name as argument means describe only that register.");
2221 add_info ("all-registers", all_registers_info
,
2222 "List of all registers and their contents, for selected stack frame.\n\
2223 Register name as argument means describe only that register.");
2225 add_info ("program", program_info
,
2226 "Execution status of the program.");
2228 add_info ("float", float_info
,
2229 "Print the status of the floating point unit\n");
2231 add_info ("vector", vector_info
,
2232 "Print the status of the vector unit\n");
2234 inferior_environ
= make_environ ();
2235 init_environ (inferior_environ
);