1 /* Memory-access and commands for "inferior" process, for GDB.
2 Copyright 1986, 87, 88, 89, 91, 92, 95, 96, 1998, 1999
3 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. */
24 #include "gdb_string.h"
40 #include "event-top.h"
41 #include "parser-defs.h"
43 /* Functions exported for general use: */
45 void nofp_registers_info (char *, int);
47 void all_registers_info (char *, int);
49 void registers_info (char *, int);
51 /* Local functions: */
53 void continue_command (char *, int);
55 static void print_return_value (int struct_return
, struct type
*value_type
);
57 static void finish_command_continuation (struct continuation_arg
*);
59 static void until_next_command (int);
61 static void until_command (char *, int);
63 static void path_info (char *, int);
65 static void path_command (char *, int);
67 static void unset_command (char *, int);
69 static void float_info (char *, int);
71 static void detach_command (char *, int);
73 static void interrupt_target_command (char *args
, int from_tty
);
75 static void unset_environment_command (char *, int);
77 static void set_environment_command (char *, int);
79 static void environment_info (char *, int);
81 static void program_info (char *, int);
83 static void finish_command (char *, int);
85 static void signal_command (char *, int);
87 static void jump_command (char *, int);
89 static void step_1 (int, int, char *);
90 static void step_once (int skip_subroutines
, int single_inst
, int count
);
91 static void step_1_continuation (struct continuation_arg
*arg
);
93 void nexti_command (char *, int);
95 void stepi_command (char *, int);
97 static void next_command (char *, int);
99 static void step_command (char *, int);
101 static void run_command (char *, int);
103 static void run_no_args_command (char *args
, int from_tty
);
105 static void go_command (char *line_no
, int from_tty
);
107 static int strip_bg_char (char **);
109 void _initialize_infcmd (void);
111 #define GO_USAGE "Usage: go <location>\n"
113 static void breakpoint_auto_delete_contents (PTR
);
115 #define ERROR_NO_INFERIOR \
116 if (!target_has_execution) error ("The program is not being run.");
118 /* String containing arguments to give to the program, separated by spaces.
119 Empty string (pointer to '\0') means no args. */
121 static char *inferior_args
;
123 /* File name for default use for standard in/out in the inferior. */
125 char *inferior_io_terminal
;
127 /* Pid of our debugged inferior, or 0 if no inferior now.
128 Since various parts of infrun.c test this to see whether there is a program
129 being debugged it should be nonzero (currently 3 is used) for remote
134 /* Last signal that the inferior received (why it stopped). */
136 enum target_signal stop_signal
;
138 /* Address at which inferior stopped. */
142 /* Chain containing status of breakpoint(s) that we have stopped at. */
146 /* Flag indicating that a command has proceeded the inferior past the
147 current breakpoint. */
149 int breakpoint_proceeded
;
151 /* Nonzero if stopped due to a step command. */
155 /* Nonzero if stopped due to completion of a stack dummy routine. */
157 int stop_stack_dummy
;
159 /* Nonzero if stopped due to a random (unexpected) signal in inferior
162 int stopped_by_random_signal
;
164 /* Range to single step within.
165 If this is nonzero, respond to a single-step signal
166 by continuing to step if the pc is in this range. */
168 CORE_ADDR step_range_start
; /* Inclusive */
169 CORE_ADDR step_range_end
; /* Exclusive */
171 /* Stack frame address as of when stepping command was issued.
172 This is how we know when we step into a subroutine call,
173 and how to set the frame for the breakpoint used to step out. */
175 CORE_ADDR step_frame_address
;
177 /* Our notion of the current stack pointer. */
181 enum step_over_calls_kind step_over_calls
;
183 /* If stepping, nonzero means step count is > 1
184 so don't print frame next time inferior stops
185 if it stops due to stepping. */
189 /* Environment to use for running inferior,
190 in format described in environ.h. */
192 struct environ
*inferior_environ
;
195 /* This function detects whether or not a '&' character (indicating
196 background execution) has been added as *the last* of the arguments ARGS
197 of a command. If it has, it removes it and returns 1. Otherwise it
198 does nothing and returns 0. */
200 strip_bg_char (char **args
)
204 p
= strchr (*args
, '&');
208 if (p
== (*args
+ strlen (*args
) - 1))
210 if (strlen (*args
) > 1)
214 while (*p
== ' ' || *p
== '\t');
227 tty_command (char *file
, int from_tty
)
230 error_no_arg ("terminal name for running target process");
232 inferior_io_terminal
= savestring (file
, strlen (file
));
236 run_command (char *args
, int from_tty
)
242 if (inferior_pid
!= 0 && target_has_execution
)
245 && !query ("The program being debugged has been started already.\n\
246 Start it from the beginning? "))
247 error ("Program not restarted.");
249 #if defined(SOLIB_RESTART)
252 init_wait_for_inferior ();
255 clear_breakpoint_hit_counts ();
257 exec_file
= (char *) get_exec_file (0);
259 /* Purge old solib objfiles. */
260 objfile_purge_solibs ();
262 do_run_cleanups (NULL
);
264 /* The exec file is re-read every time we do a generic_mourn_inferior, so
265 we just have to worry about the symbol file. */
268 /* We keep symbols from add-symbol-file, on the grounds that the
269 user might want to add some symbols before running the program
270 (right?). But sometimes (dynamic loading where the user manually
271 introduces the new symbols with add-symbol-file), the code which
272 the symbols describe does not persist between runs. Currently
273 the user has to manually nuke all symbols between runs if they
274 want them to go away (PR 2207). This is probably reasonable. */
278 if (event_loop_p
&& target_can_async_p ())
279 async_disable_stdin ();
284 int async_exec
= strip_bg_char (&args
);
286 /* If we get a request for running in the bg but the target
287 doesn't support it, error out. */
288 if (event_loop_p
&& async_exec
&& !target_can_async_p ())
289 error ("Asynchronous execution not supported on this target.");
291 /* If we don't get a request of running in the bg, then we need
292 to simulate synchronous (fg) execution. */
293 if (event_loop_p
&& !async_exec
&& target_can_async_p ())
295 /* Simulate synchronous execution */
296 async_disable_stdin ();
299 /* If there were other args, beside '&', process them. */
302 cmd
= concat ("set args ", args
, NULL
);
303 make_cleanup (free
, cmd
);
304 execute_command (cmd
, from_tty
);
311 ui_out_field_string (uiout
, NULL
, "Starting program");
312 ui_out_text (uiout
, ": ");
314 ui_out_field_string (uiout
, "execfile", exec_file
);
315 ui_out_spaces (uiout
, 1);
316 ui_out_field_string (uiout
, "infargs", inferior_args
);
317 ui_out_text (uiout
, "\n");
318 ui_out_flush (uiout
);
320 puts_filtered ("Starting program: ");
322 puts_filtered (exec_file
);
324 puts_filtered (inferior_args
);
325 puts_filtered ("\n");
326 gdb_flush (gdb_stdout
);
330 target_create_inferior (exec_file
, inferior_args
,
331 environ_vector (inferior_environ
));
336 run_no_args_command (char *args
, int from_tty
)
338 execute_command ("set args", from_tty
);
339 run_command ((char *) NULL
, from_tty
);
344 continue_command (char *proc_count_exp
, int from_tty
)
349 /* Find out whether we must run in the background. */
350 if (proc_count_exp
!= NULL
)
351 async_exec
= strip_bg_char (&proc_count_exp
);
353 /* If we must run in the background, but the target can't do it,
355 if (event_loop_p
&& async_exec
&& !target_can_async_p ())
356 error ("Asynchronous execution not supported on this target.");
358 /* If we are not asked to run in the bg, then prepare to run in the
359 foreground, synchronously. */
360 if (event_loop_p
&& !async_exec
&& target_can_async_p ())
362 /* Simulate synchronous execution */
363 async_disable_stdin ();
366 /* If have argument (besides '&'), set proceed count of breakpoint
368 if (proc_count_exp
!= NULL
)
370 bpstat bs
= stop_bpstat
;
371 int num
= bpstat_num (&bs
);
372 if (num
== 0 && from_tty
)
375 ("Not stopped at any breakpoint; argument ignored.\n");
379 set_ignore_count (num
,
380 parse_and_eval_long (proc_count_exp
) - 1,
382 /* set_ignore_count prints a message ending with a period.
383 So print two spaces before "Continuing.". */
385 printf_filtered (" ");
386 num
= bpstat_num (&bs
);
391 printf_filtered ("Continuing.\n");
393 clear_proceed_status ();
395 proceed ((CORE_ADDR
) -1, TARGET_SIGNAL_DEFAULT
, 0);
398 /* Step until outside of current statement. */
402 step_command (char *count_string
, int from_tty
)
404 step_1 (0, 0, count_string
);
407 /* Likewise, but skip over subroutine calls as if single instructions. */
411 next_command (char *count_string
, int from_tty
)
413 step_1 (1, 0, count_string
);
416 /* Likewise, but step only one instruction. */
420 stepi_command (char *count_string
, int from_tty
)
422 step_1 (0, 1, count_string
);
427 nexti_command (char *count_string
, int from_tty
)
429 step_1 (1, 1, count_string
);
433 disable_longjmp_breakpoint_cleanup (void *ignore
)
435 disable_longjmp_breakpoint ();
439 step_1 (int skip_subroutines
, int single_inst
, char *count_string
)
441 register int count
= 1;
442 struct frame_info
*frame
;
443 struct cleanup
*cleanups
= 0;
449 async_exec
= strip_bg_char (&count_string
);
451 /* If we get a request for running in the bg but the target
452 doesn't support it, error out. */
453 if (event_loop_p
&& async_exec
&& !target_can_async_p ())
454 error ("Asynchronous execution not supported on this target.");
456 /* If we don't get a request of running in the bg, then we need
457 to simulate synchronous (fg) execution. */
458 if (event_loop_p
&& !async_exec
&& target_can_async_p ())
460 /* Simulate synchronous execution */
461 async_disable_stdin ();
464 count
= count_string
? parse_and_eval_long (count_string
) : 1;
466 if (!single_inst
|| skip_subroutines
) /* leave si command alone */
468 enable_longjmp_breakpoint ();
469 if (!event_loop_p
|| !target_can_async_p ())
470 cleanups
= make_cleanup (disable_longjmp_breakpoint_cleanup
, 0 /*ignore*/);
472 make_exec_cleanup (disable_longjmp_breakpoint_cleanup
, 0 /*ignore*/);
475 /* In synchronous case, all is well, just use the regular for loop. */
476 if (!event_loop_p
|| !target_can_async_p ())
478 for (; count
> 0; count
--)
480 clear_proceed_status ();
482 frame
= get_current_frame ();
483 if (!frame
) /* Avoid coredump here. Why tho? */
484 error ("No current frame");
485 step_frame_address
= FRAME_FP (frame
);
486 step_sp
= read_sp ();
490 find_pc_line_pc_range (stop_pc
, &step_range_start
, &step_range_end
);
491 if (step_range_end
== 0)
494 if (find_pc_partial_function (stop_pc
, &name
, &step_range_start
,
495 &step_range_end
) == 0)
496 error ("Cannot find bounds of current function");
498 target_terminal_ours ();
500 Single stepping until exit from function %s, \n\
501 which has no line number information.\n", name
);
506 /* Say we are stepping, but stop after one insn whatever it does. */
507 step_range_start
= step_range_end
= 1;
508 if (!skip_subroutines
)
510 Don't step over function calls, not even to functions lacking
512 step_over_calls
= STEP_OVER_NONE
;
515 if (skip_subroutines
)
516 step_over_calls
= STEP_OVER_ALL
;
518 step_multi
= (count
> 1);
519 proceed ((CORE_ADDR
) -1, TARGET_SIGNAL_DEFAULT
, 1);
524 /* FIXME: On nexti, this may have already been done (when we hit the
525 step resume break, I think). Probably this should be moved to
526 wait_for_inferior (near the top). */
527 #if defined (SHIFT_INST_REGS)
532 if (!single_inst
|| skip_subroutines
)
533 do_cleanups (cleanups
);
536 /* In case of asynchronous target things get complicated, do only
537 one step for now, before returning control to the event loop. Let
538 the continuation figure out how many other steps we need to do,
539 and handle them one at the time, through step_once(). */
542 if (event_loop_p
&& target_can_async_p ())
543 step_once (skip_subroutines
, single_inst
, count
);
547 /* Called after we are done with one step operation, to check whether
548 we need to step again, before we print the prompt and return control
549 to the user. If count is > 1, we will need to do one more call to
550 proceed(), via step_once(). Basically it is like step_once and
551 step_1_continuation are co-recursive. */
553 step_1_continuation (struct continuation_arg
*arg
)
556 int skip_subroutines
;
559 skip_subroutines
= arg
->data
.integer
;
560 single_inst
= arg
->next
->data
.integer
;
561 count
= arg
->next
->next
->data
.integer
;
565 /* FIXME: On nexti, this may have already been done (when we hit the
566 step resume break, I think). Probably this should be moved to
567 wait_for_inferior (near the top). */
568 #if defined (SHIFT_INST_REGS)
571 step_once (skip_subroutines
, single_inst
, count
- 1);
574 if (!single_inst
|| skip_subroutines
)
575 do_exec_cleanups (ALL_CLEANUPS
);
578 /* Do just one step operation. If count >1 we will have to set up a
579 continuation to be done after the target stops (after this one
580 step). This is useful to implement the 'step n' kind of commands, in
581 case of asynchronous targets. We had to split step_1 into two parts,
582 one to be done before proceed() and one afterwards. This function is
583 called in case of step n with n>1, after the first step operation has
586 step_once (int skip_subroutines
, int single_inst
, int count
)
588 struct continuation_arg
*arg1
;
589 struct continuation_arg
*arg2
;
590 struct continuation_arg
*arg3
;
591 struct frame_info
*frame
;
595 clear_proceed_status ();
597 frame
= get_current_frame ();
598 if (!frame
) /* Avoid coredump here. Why tho? */
599 error ("No current frame");
600 step_frame_address
= FRAME_FP (frame
);
601 step_sp
= read_sp ();
605 find_pc_line_pc_range (stop_pc
, &step_range_start
, &step_range_end
);
607 /* If we have no line info, switch to stepi mode. */
608 if (step_range_end
== 0 && step_stop_if_no_debug
)
610 step_range_start
= step_range_end
= 1;
612 else if (step_range_end
== 0)
615 if (find_pc_partial_function (stop_pc
, &name
, &step_range_start
,
616 &step_range_end
) == 0)
617 error ("Cannot find bounds of current function");
619 target_terminal_ours ();
621 Single stepping until exit from function %s, \n\
622 which has no line number information.\n", name
);
627 /* Say we are stepping, but stop after one insn whatever it does. */
628 step_range_start
= step_range_end
= 1;
629 if (!skip_subroutines
)
631 Don't step over function calls, not even to functions lacking
633 step_over_calls
= STEP_OVER_NONE
;
636 if (skip_subroutines
)
637 step_over_calls
= STEP_OVER_ALL
;
639 step_multi
= (count
> 1);
641 (struct continuation_arg
*) xmalloc (sizeof (struct continuation_arg
));
643 (struct continuation_arg
*) xmalloc (sizeof (struct continuation_arg
));
645 (struct continuation_arg
*) xmalloc (sizeof (struct continuation_arg
));
647 arg1
->data
.integer
= skip_subroutines
;
649 arg2
->data
.integer
= single_inst
;
651 arg3
->data
.integer
= count
;
652 add_intermediate_continuation (step_1_continuation
, arg1
);
653 proceed ((CORE_ADDR
) -1, TARGET_SIGNAL_DEFAULT
, 1);
658 /* Continue program at specified address. */
661 jump_command (char *arg
, int from_tty
)
663 register CORE_ADDR addr
;
664 struct symtabs_and_lines sals
;
665 struct symtab_and_line sal
;
672 /* Find out whether we must run in the background. */
674 async_exec
= strip_bg_char (&arg
);
676 /* If we must run in the background, but the target can't do it,
678 if (event_loop_p
&& async_exec
&& !target_can_async_p ())
679 error ("Asynchronous execution not supported on this target.");
681 /* If we are not asked to run in the bg, then prepare to run in the
682 foreground, synchronously. */
683 if (event_loop_p
&& !async_exec
&& target_can_async_p ())
685 /* Simulate synchronous execution */
686 async_disable_stdin ();
690 error_no_arg ("starting address");
692 sals
= decode_line_spec_1 (arg
, 1);
695 error ("Unreasonable jump request");
699 free ((PTR
) sals
.sals
);
701 if (sal
.symtab
== 0 && sal
.pc
== 0)
702 error ("No source file has been specified.");
704 resolve_sal_pc (&sal
); /* May error out */
706 /* See if we are trying to jump to another function. */
707 fn
= get_frame_function (get_current_frame ());
708 sfn
= find_pc_function (sal
.pc
);
709 if (fn
!= NULL
&& sfn
!= fn
)
711 if (!query ("Line %d is not in `%s'. Jump anyway? ", sal
.line
,
712 SYMBOL_SOURCE_NAME (fn
)))
714 error ("Not confirmed.");
721 fixup_symbol_section (sfn
, 0);
722 if (section_is_overlay (SYMBOL_BFD_SECTION (sfn
)) &&
723 !section_is_mapped (SYMBOL_BFD_SECTION (sfn
)))
725 if (!query ("WARNING!!! Destination is in unmapped overlay! Jump anyway? "))
727 error ("Not confirmed.");
737 printf_filtered ("Continuing at ");
738 print_address_numeric (addr
, 1, gdb_stdout
);
739 printf_filtered (".\n");
742 clear_proceed_status ();
743 proceed (addr
, TARGET_SIGNAL_0
, 0);
747 /* Go to line or address in current procedure */
749 go_command (char *line_no
, int from_tty
)
751 if (line_no
== (char *) NULL
|| !*line_no
)
752 printf_filtered (GO_USAGE
);
755 tbreak_command (line_no
, from_tty
);
756 jump_command (line_no
, from_tty
);
761 /* Continue program giving it specified signal. */
764 signal_command (char *signum_exp
, int from_tty
)
766 enum target_signal oursig
;
768 dont_repeat (); /* Too dangerous. */
772 error_no_arg ("signal number");
774 /* It would be even slicker to make signal names be valid expressions,
775 (the type could be "enum $signal" or some such), then the user could
776 assign them to convenience variables. */
777 oursig
= target_signal_from_name (signum_exp
);
779 if (oursig
== TARGET_SIGNAL_UNKNOWN
)
781 /* No, try numeric. */
782 int num
= parse_and_eval_long (signum_exp
);
785 oursig
= TARGET_SIGNAL_0
;
787 oursig
= target_signal_from_command (num
);
792 if (oursig
== TARGET_SIGNAL_0
)
793 printf_filtered ("Continuing with no signal.\n");
795 printf_filtered ("Continuing with signal %s.\n",
796 target_signal_to_name (oursig
));
799 clear_proceed_status ();
800 /* "signal 0" should not get stuck if we are stopped at a breakpoint.
801 FIXME: Neither should "signal foo" but when I tried passing
802 (CORE_ADDR)-1 unconditionally I got a testsuite failure which I haven't
803 tried to track down yet. */
804 proceed (oursig
== TARGET_SIGNAL_0
? (CORE_ADDR
) -1 : stop_pc
, oursig
, 0);
807 /* Call breakpoint_auto_delete on the current contents of the bpstat
808 pointed to by arg (which is really a bpstat *). */
811 breakpoint_auto_delete_contents (PTR arg
)
813 breakpoint_auto_delete (*(bpstat
*) arg
);
817 /* Execute a "stack dummy", a piece of code stored in the stack
818 by the debugger to be executed in the inferior.
820 To call: first, do PUSH_DUMMY_FRAME.
821 Then push the contents of the dummy. It should end with a breakpoint insn.
822 Then call here, passing address at which to start the dummy.
824 The contents of all registers are saved before the dummy frame is popped
825 and copied into the buffer BUFFER.
827 The dummy's frame is automatically popped whenever that break is hit.
828 If that is the first time the program stops, run_stack_dummy
829 returns to its caller with that frame already gone and returns 0.
831 Otherwise, run_stack-dummy returns a non-zero value.
832 If the called function receives a random signal, we do not allow the user
833 to continue executing it as this may not work. The dummy frame is poped
835 If we hit a breakpoint, we leave the frame in place and return 2 (the frame
836 will eventually be popped when we do hit the dummy end breakpoint). */
839 run_stack_dummy (CORE_ADDR addr
, char *buffer
)
841 struct cleanup
*old_cleanups
= make_cleanup (null_cleanup
, 0);
844 /* Now proceed, having reached the desired place. */
845 clear_proceed_status ();
847 if (CALL_DUMMY_BREAKPOINT_OFFSET_P
)
849 struct breakpoint
*bpt
;
850 struct symtab_and_line sal
;
852 INIT_SAL (&sal
); /* initialize to zeroes */
853 if (CALL_DUMMY_LOCATION
== AT_ENTRY_POINT
)
855 sal
.pc
= CALL_DUMMY_ADDRESS ();
859 sal
.pc
= addr
- CALL_DUMMY_START_OFFSET
+ CALL_DUMMY_BREAKPOINT_OFFSET
;
861 sal
.section
= find_pc_overlay (sal
.pc
);
863 /* Set up a FRAME for the dummy frame so we can pass it to
864 set_momentary_breakpoint. We need to give the breakpoint a
865 frame in case there is only one copy of the dummy (e.g.
866 CALL_DUMMY_LOCATION == AFTER_TEXT_END). */
867 flush_cached_frames ();
868 set_current_frame (create_new_frame (read_fp (), sal
.pc
));
870 /* If defined, CALL_DUMMY_BREAKPOINT_OFFSET is where we need to put
871 a breakpoint instruction. If not, the call dummy already has the
872 breakpoint instruction in it.
874 addr is the address of the call dummy plus the CALL_DUMMY_START_OFFSET,
875 so we need to subtract the CALL_DUMMY_START_OFFSET. */
876 bpt
= set_momentary_breakpoint (sal
,
877 get_current_frame (),
879 bpt
->disposition
= del
;
881 /* If all error()s out of proceed ended up calling normal_stop (and
882 perhaps they should; it already does in the special case of error
883 out of resume()), then we wouldn't need this. */
884 make_cleanup (breakpoint_auto_delete_contents
, &stop_bpstat
);
887 disable_watchpoints_before_interactive_call_start ();
888 proceed_to_finish
= 1; /* We want stop_registers, please... */
890 if (target_can_async_p ())
891 saved_async
= target_async_mask (0);
893 proceed (addr
, TARGET_SIGNAL_0
, 0);
896 target_async_mask (saved_async
);
898 enable_watchpoints_after_interactive_call_stop ();
900 discard_cleanups (old_cleanups
);
902 /* We can stop during an inferior call because a signal is received. */
903 if (stopped_by_random_signal
)
906 /* We may also stop prematurely because we hit a breakpoint in the
908 if (!stop_stack_dummy
)
911 /* On normal return, the stack dummy has been popped already. */
913 memcpy (buffer
, stop_registers
, REGISTER_BYTES
);
917 /* Proceed until we reach a different source line with pc greater than
918 our current one or exit the function. We skip calls in both cases.
920 Note that eventually this command should probably be changed so
921 that only source lines are printed out when we hit the breakpoint
922 we set. This may involve changes to wait_for_inferior and the
923 proceed status code. */
927 until_next_command (int from_tty
)
929 struct frame_info
*frame
;
932 struct symtab_and_line sal
;
934 clear_proceed_status ();
936 frame
= get_current_frame ();
938 /* Step until either exited from this function or greater
939 than the current line (if in symbolic section) or pc (if
943 func
= find_pc_function (pc
);
947 struct minimal_symbol
*msymbol
= lookup_minimal_symbol_by_pc (pc
);
950 error ("Execution is not within a known function.");
952 step_range_start
= SYMBOL_VALUE_ADDRESS (msymbol
);
957 sal
= find_pc_line (pc
, 0);
959 step_range_start
= BLOCK_START (SYMBOL_BLOCK_VALUE (func
));
960 step_range_end
= sal
.end
;
963 step_over_calls
= STEP_OVER_ALL
;
964 step_frame_address
= FRAME_FP (frame
);
965 step_sp
= read_sp ();
967 step_multi
= 0; /* Only one call to proceed */
969 proceed ((CORE_ADDR
) -1, TARGET_SIGNAL_DEFAULT
, 1);
973 until_command (char *arg
, int from_tty
)
977 if (!target_has_execution
)
978 error ("The program is not running.");
980 /* Find out whether we must run in the background. */
982 async_exec
= strip_bg_char (&arg
);
984 /* If we must run in the background, but the target can't do it,
986 if (event_loop_p
&& async_exec
&& !target_can_async_p ())
987 error ("Asynchronous execution not supported on this target.");
989 /* If we are not asked to run in the bg, then prepare to run in the
990 foreground, synchronously. */
991 if (event_loop_p
&& !async_exec
&& target_can_async_p ())
993 /* Simulate synchronous execution */
994 async_disable_stdin ();
998 until_break_command (arg
, from_tty
);
1000 until_next_command (from_tty
);
1004 /* Print the result of a function at the end of a 'finish' command. */
1006 print_return_value (int structure_return
, struct type
*value_type
)
1008 register value_ptr value
;
1010 static struct ui_stream
*stb
= NULL
;
1013 if (!structure_return
)
1015 value
= value_being_returned (value_type
, stop_registers
, structure_return
);
1017 stb
= ui_out_stream_new (uiout
);
1018 ui_out_text (uiout
, "Value returned is ");
1019 ui_out_field_fmt (uiout
, "gdb-result-var", "$%d", record_latest_value (value
));
1020 ui_out_text (uiout
, "= ");
1021 value_print (value
, stb
->stream
, 0, Val_no_prettyprint
);
1022 ui_out_field_stream (uiout
, "return-value", stb
);
1023 ui_out_text (uiout
, "\n");
1025 printf_filtered ("Value returned is $%d = ", record_latest_value (value
));
1026 value_print (value
, gdb_stdout
, 0, Val_no_prettyprint
);
1027 printf_filtered ("\n");
1032 /* We cannot determine the contents of the structure because
1033 it is on the stack, and we don't know where, since we did not
1034 initiate the call, as opposed to the call_function_by_hand case */
1035 #ifdef VALUE_RETURNED_FROM_STACK
1038 ui_out_text (uiout
, "Value returned has type: ");
1039 ui_out_field_string (uiout
, "return-type", TYPE_NAME (value_type
));
1040 ui_out_text (uiout
, ".");
1041 ui_out_text (uiout
, " Cannot determine contents\n");
1043 printf_filtered ("Value returned has type: %s.", TYPE_NAME (value_type
));
1044 printf_filtered (" Cannot determine contents\n");
1047 value
= value_being_returned (value_type
, stop_registers
, structure_return
);
1049 stb
= ui_out_stream_new (uiout
);
1050 ui_out_text (uiout
, "Value returned is ");
1051 ui_out_field_fmt (uiout
, "gdb-result-var", "$%d", record_latest_value (value
));
1052 ui_out_text (uiout
, "= ");
1053 value_print (value
, stb
->stream
, 0, Val_no_prettyprint
);
1054 ui_out_field_stream (uiout
, "return-value", stb
);
1055 ui_out_text (uiout
, "\n");
1057 printf_filtered ("Value returned is $%d = ", record_latest_value (value
));
1058 value_print (value
, gdb_stdout
, 0, Val_no_prettyprint
);
1059 printf_filtered ("\n");
1065 /* Stuff that needs to be done by the finish command after the target
1066 has stopped. In asynchronous mode, we wait for the target to stop in
1067 the call to poll or select in the event loop, so it is impossible to
1068 do all the stuff as part of the finish_command function itself. The
1069 only chance we have to complete this command is in
1070 fetch_inferior_event, which is called by the event loop as soon as it
1071 detects that the target has stopped. This function is called via the
1072 cmd_continuation pointer. */
1074 finish_command_continuation (struct continuation_arg
*arg
)
1076 register struct symbol
*function
;
1077 struct breakpoint
*breakpoint
;
1078 struct cleanup
*cleanups
;
1080 breakpoint
= (struct breakpoint
*) arg
->data
.pointer
;
1081 function
= (struct symbol
*) arg
->next
->data
.pointer
;
1082 cleanups
= (struct cleanup
*) arg
->next
->next
->data
.pointer
;
1084 if (bpstat_find_breakpoint (stop_bpstat
, breakpoint
) != NULL
1087 struct type
*value_type
;
1091 value_type
= TYPE_TARGET_TYPE (SYMBOL_TYPE (function
));
1093 internal_error ("finish_command: function has no target type");
1095 if (TYPE_CODE (value_type
) == TYPE_CODE_VOID
)
1097 do_exec_cleanups (cleanups
);
1101 funcaddr
= BLOCK_START (SYMBOL_BLOCK_VALUE (function
));
1103 struct_return
= using_struct_return (value_of_variable (function
, NULL
),
1105 check_typedef (value_type
),
1106 BLOCK_GCC_COMPILED (SYMBOL_BLOCK_VALUE (function
)));
1108 print_return_value (struct_return
, value_type
);
1110 do_exec_cleanups (cleanups
);
1113 /* "finish": Set a temporary breakpoint at the place
1114 the selected frame will return to, then continue. */
1117 finish_command (char *arg
, int from_tty
)
1119 struct symtab_and_line sal
;
1120 register struct frame_info
*frame
;
1121 register struct symbol
*function
;
1122 struct breakpoint
*breakpoint
;
1123 struct cleanup
*old_chain
;
1124 struct continuation_arg
*arg1
, *arg2
, *arg3
;
1128 /* Find out whether we must run in the background. */
1130 async_exec
= strip_bg_char (&arg
);
1132 /* If we must run in the background, but the target can't do it,
1134 if (event_loop_p
&& async_exec
&& !target_can_async_p ())
1135 error ("Asynchronous execution not supported on this target.");
1137 /* If we are not asked to run in the bg, then prepare to run in the
1138 foreground, synchronously. */
1139 if (event_loop_p
&& !async_exec
&& target_can_async_p ())
1141 /* Simulate synchronous execution */
1142 async_disable_stdin ();
1146 error ("The \"finish\" command does not take any arguments.");
1147 if (!target_has_execution
)
1148 error ("The program is not running.");
1149 if (selected_frame
== NULL
)
1150 error ("No selected frame.");
1152 frame
= get_prev_frame (selected_frame
);
1154 error ("\"finish\" not meaningful in the outermost frame.");
1156 clear_proceed_status ();
1158 sal
= find_pc_line (frame
->pc
, 0);
1161 breakpoint
= set_momentary_breakpoint (sal
, frame
, bp_finish
);
1163 if (!event_loop_p
|| !target_can_async_p ())
1164 old_chain
= make_cleanup_delete_breakpoint (breakpoint
);
1166 old_chain
= make_exec_cleanup_delete_breakpoint (breakpoint
);
1168 /* Find the function we will return from. */
1170 function
= find_pc_function (selected_frame
->pc
);
1172 /* Print info on the selected frame, including level number
1176 printf_filtered ("Run till exit from ");
1177 print_stack_frame (selected_frame
, selected_frame_level
, 0);
1180 /* If running asynchronously and the target support asynchronous
1181 execution, set things up for the rest of the finish command to be
1182 completed later on, when gdb has detected that the target has
1183 stopped, in fetch_inferior_event. */
1184 if (event_loop_p
&& target_can_async_p ())
1187 (struct continuation_arg
*) xmalloc (sizeof (struct continuation_arg
));
1189 (struct continuation_arg
*) xmalloc (sizeof (struct continuation_arg
));
1191 (struct continuation_arg
*) xmalloc (sizeof (struct continuation_arg
));
1195 arg1
->data
.pointer
= breakpoint
;
1196 arg2
->data
.pointer
= function
;
1197 arg3
->data
.pointer
= old_chain
;
1198 add_continuation (finish_command_continuation
, arg1
);
1201 proceed_to_finish
= 1; /* We want stop_registers, please... */
1202 proceed ((CORE_ADDR
) -1, TARGET_SIGNAL_DEFAULT
, 0);
1204 /* Do this only if not running asynchronously or if the target
1205 cannot do async execution. Otherwise, complete this command when
1206 the target actually stops, in fetch_inferior_event. */
1207 if (!event_loop_p
|| !target_can_async_p ())
1210 /* Did we stop at our breakpoint? */
1211 if (bpstat_find_breakpoint (stop_bpstat
, breakpoint
) != NULL
1214 struct type
*value_type
;
1218 value_type
= TYPE_TARGET_TYPE (SYMBOL_TYPE (function
));
1220 internal_error ("finish_command: function has no target type");
1222 /* FIXME: Shouldn't we do the cleanups before returning? */
1223 if (TYPE_CODE (value_type
) == TYPE_CODE_VOID
)
1226 funcaddr
= BLOCK_START (SYMBOL_BLOCK_VALUE (function
));
1229 using_struct_return (value_of_variable (function
, NULL
),
1231 check_typedef (value_type
),
1232 BLOCK_GCC_COMPILED (SYMBOL_BLOCK_VALUE (function
)));
1234 print_return_value (struct_return
, value_type
);
1236 do_cleanups (old_chain
);
1242 program_info (char *args
, int from_tty
)
1244 bpstat bs
= stop_bpstat
;
1245 int num
= bpstat_num (&bs
);
1247 if (!target_has_execution
)
1249 printf_filtered ("The program being debugged is not being run.\n");
1253 target_files_info ();
1254 printf_filtered ("Program stopped at %s.\n",
1255 local_hex_string ((unsigned long) stop_pc
));
1257 printf_filtered ("It stopped after being stepped.\n");
1260 /* There may be several breakpoints in the same place, so this
1261 isn't as strange as it seems. */
1266 printf_filtered ("It stopped at a breakpoint that has ");
1267 printf_filtered ("since been deleted.\n");
1270 printf_filtered ("It stopped at breakpoint %d.\n", num
);
1271 num
= bpstat_num (&bs
);
1274 else if (stop_signal
!= TARGET_SIGNAL_0
)
1276 printf_filtered ("It stopped with signal %s, %s.\n",
1277 target_signal_to_name (stop_signal
),
1278 target_signal_to_string (stop_signal
));
1283 printf_filtered ("Type \"info stack\" or \"info registers\" ");
1284 printf_filtered ("for more information.\n");
1289 environment_info (char *var
, int from_tty
)
1293 register char *val
= get_in_environ (inferior_environ
, var
);
1296 puts_filtered (var
);
1297 puts_filtered (" = ");
1298 puts_filtered (val
);
1299 puts_filtered ("\n");
1303 puts_filtered ("Environment variable \"");
1304 puts_filtered (var
);
1305 puts_filtered ("\" not defined.\n");
1310 register char **vector
= environ_vector (inferior_environ
);
1313 puts_filtered (*vector
++);
1314 puts_filtered ("\n");
1320 set_environment_command (char *arg
, int from_tty
)
1322 register char *p
, *val
, *var
;
1326 error_no_arg ("environment variable and value");
1328 /* Find seperation between variable name and value */
1329 p
= (char *) strchr (arg
, '=');
1330 val
= (char *) strchr (arg
, ' ');
1332 if (p
!= 0 && val
!= 0)
1334 /* We have both a space and an equals. If the space is before the
1335 equals, walk forward over the spaces til we see a nonspace
1336 (possibly the equals). */
1341 /* Now if the = is after the char following the spaces,
1342 take the char following the spaces. */
1346 else if (val
!= 0 && p
== 0)
1350 error_no_arg ("environment variable to set");
1352 if (p
== 0 || p
[1] == 0)
1356 p
= arg
+ strlen (arg
); /* So that savestring below will work */
1360 /* Not setting variable value to null */
1362 while (*val
== ' ' || *val
== '\t')
1366 while (p
!= arg
&& (p
[-1] == ' ' || p
[-1] == '\t'))
1369 var
= savestring (arg
, p
- arg
);
1372 printf_filtered ("Setting environment variable ");
1373 printf_filtered ("\"%s\" to null value.\n", var
);
1374 set_in_environ (inferior_environ
, var
, "");
1377 set_in_environ (inferior_environ
, var
, val
);
1382 unset_environment_command (char *var
, int from_tty
)
1386 /* If there is no argument, delete all environment variables.
1387 Ask for confirmation if reading from the terminal. */
1388 if (!from_tty
|| query ("Delete all environment variables? "))
1390 free_environ (inferior_environ
);
1391 inferior_environ
= make_environ ();
1395 unset_in_environ (inferior_environ
, var
);
1398 /* Handle the execution path (PATH variable) */
1400 static const char path_var_name
[] = "PATH";
1404 path_info (char *args
, int from_tty
)
1406 puts_filtered ("Executable and object file path: ");
1407 puts_filtered (get_in_environ (inferior_environ
, path_var_name
));
1408 puts_filtered ("\n");
1411 /* Add zero or more directories to the front of the execution path. */
1414 path_command (char *dirname
, int from_tty
)
1419 env
= get_in_environ (inferior_environ
, path_var_name
);
1420 /* Can be null if path is not set */
1423 exec_path
= strsave (env
);
1424 mod_path (dirname
, &exec_path
);
1425 set_in_environ (inferior_environ
, path_var_name
, exec_path
);
1428 path_info ((char *) NULL
, from_tty
);
1432 #ifdef REGISTER_NAMES
1433 char *gdb_register_names
[] = REGISTER_NAMES
;
1435 /* Print out the machine register regnum. If regnum is -1,
1436 print all registers (fpregs == 1) or all non-float registers
1439 For most machines, having all_registers_info() print the
1440 register(s) one per line is good enough. If a different format
1441 is required, (eg, for MIPS or Pyramid 90x, which both have
1442 lots of regs), or there is an existing convention for showing
1443 all the registers, define the macro DO_REGISTERS_INFO(regnum, fp)
1444 to provide that format. */
1447 do_registers_info (int regnum
, int fpregs
)
1450 int numregs
= ARCH_NUM_REGS
;
1452 for (i
= 0; i
< numregs
; i
++)
1454 char raw_buffer
[MAX_REGISTER_RAW_SIZE
];
1455 char virtual_buffer
[MAX_REGISTER_VIRTUAL_SIZE
];
1457 /* Decide between printing all regs, nonfloat regs, or specific reg. */
1460 if (TYPE_CODE (REGISTER_VIRTUAL_TYPE (i
)) == TYPE_CODE_FLT
&& !fpregs
)
1469 /* If the register name is empty, it is undefined for this
1470 processor, so don't display anything. */
1471 if (REGISTER_NAME (i
) == NULL
|| *(REGISTER_NAME (i
)) == '\0')
1474 fputs_filtered (REGISTER_NAME (i
), gdb_stdout
);
1475 print_spaces_filtered (15 - strlen (REGISTER_NAME (i
)), gdb_stdout
);
1477 /* Get the data in raw format. */
1478 if (read_relative_register_raw_bytes (i
, raw_buffer
))
1480 printf_filtered ("*value not available*\n");
1484 /* Convert raw data to virtual format if necessary. */
1485 if (REGISTER_CONVERTIBLE (i
))
1487 REGISTER_CONVERT_TO_VIRTUAL (i
, REGISTER_VIRTUAL_TYPE (i
),
1488 raw_buffer
, virtual_buffer
);
1492 memcpy (virtual_buffer
, raw_buffer
,
1493 REGISTER_VIRTUAL_SIZE (i
));
1496 /* If virtual format is floating, print it that way, and in raw hex. */
1497 if (TYPE_CODE (REGISTER_VIRTUAL_TYPE (i
)) == TYPE_CODE_FLT
)
1501 #ifdef INVALID_FLOAT
1502 if (INVALID_FLOAT (virtual_buffer
, REGISTER_VIRTUAL_SIZE (i
)))
1503 printf_filtered ("<invalid float>");
1506 val_print (REGISTER_VIRTUAL_TYPE (i
), virtual_buffer
, 0, 0,
1507 gdb_stdout
, 0, 1, 0, Val_pretty_default
);
1509 printf_filtered ("\t(raw 0x");
1510 for (j
= 0; j
< REGISTER_RAW_SIZE (i
); j
++)
1512 register int idx
= TARGET_BYTE_ORDER
== BIG_ENDIAN
? j
1513 : REGISTER_RAW_SIZE (i
) - 1 - j
;
1514 printf_filtered ("%02x", (unsigned char) raw_buffer
[idx
]);
1516 printf_filtered (")");
1519 /* FIXME! val_print probably can handle all of these cases now... */
1521 /* Else if virtual format is too long for printf,
1522 print in hex a byte at a time. */
1523 else if (REGISTER_VIRTUAL_SIZE (i
) > (int) sizeof (long))
1526 printf_filtered ("0x");
1527 for (j
= 0; j
< REGISTER_VIRTUAL_SIZE (i
); j
++)
1528 printf_filtered ("%02x", (unsigned char) virtual_buffer
[j
]);
1530 /* Else print as integer in hex and in decimal. */
1533 val_print (REGISTER_VIRTUAL_TYPE (i
), virtual_buffer
, 0, 0,
1534 gdb_stdout
, 'x', 1, 0, Val_pretty_default
);
1535 printf_filtered ("\t");
1536 val_print (REGISTER_VIRTUAL_TYPE (i
), virtual_buffer
, 0, 0,
1537 gdb_stdout
, 0, 1, 0, Val_pretty_default
);
1540 /* The SPARC wants to print even-numbered float regs as doubles
1541 in addition to printing them as floats. */
1542 #ifdef PRINT_REGISTER_HOOK
1543 PRINT_REGISTER_HOOK (i
);
1546 printf_filtered ("\n");
1551 registers_info (char *addr_exp
, int fpregs
)
1553 int regnum
, numregs
;
1556 if (!target_has_registers
)
1557 error ("The program has no registers now.");
1558 if (selected_frame
== NULL
)
1559 error ("No selected frame.");
1563 DO_REGISTERS_INFO (-1, fpregs
);
1569 if (addr_exp
[0] == '$')
1572 while (*end
!= '\0' && *end
!= ' ' && *end
!= '\t')
1574 numregs
= ARCH_NUM_REGS
;
1576 regnum
= target_map_name_to_register (addr_exp
, end
- addr_exp
);
1582 if (*addr_exp
>= '0' && *addr_exp
<= '9')
1583 regnum
= atoi (addr_exp
); /* Take a number */
1584 if (regnum
>= numregs
) /* Bad name, or bad number */
1585 error ("%.*s: invalid register", end
- addr_exp
, addr_exp
);
1588 DO_REGISTERS_INFO (regnum
, fpregs
);
1591 while (*addr_exp
== ' ' || *addr_exp
== '\t')
1594 while (*addr_exp
!= '\0');
1598 all_registers_info (char *addr_exp
, int from_tty
)
1600 registers_info (addr_exp
, 1);
1604 nofp_registers_info (char *addr_exp
, int from_tty
)
1606 registers_info (addr_exp
, 0);
1612 * Should save/restore the tty state since it might be that the
1613 * program to be debugged was started on this tty and it wants
1614 * the tty in some state other than what we want. If it's running
1615 * on another terminal or without a terminal, then saving and
1616 * restoring the tty state is a harmless no-op.
1617 * This only needs to be done if we are attaching to a process.
1622 takes a program started up outside of gdb and ``attaches'' to it.
1623 This stops it cold in its tracks and allows us to start debugging it.
1624 and wait for the trace-trap that results from attaching. */
1627 attach_command (char *args
, int from_tty
)
1630 extern int auto_solib_add
;
1634 char *full_exec_path
= NULL
;
1636 dont_repeat (); /* Not for the faint of heart */
1638 if (target_has_execution
)
1640 if (query ("A program is being debugged already. Kill it? "))
1643 error ("Not killed.");
1646 target_attach (args
, from_tty
);
1648 /* Set up the "saved terminal modes" of the inferior
1649 based on what modes we are starting it with. */
1650 target_terminal_init ();
1652 /* Install inferior's terminal modes. */
1653 target_terminal_inferior ();
1655 /* Set up execution context to know that we should return from
1656 wait_for_inferior as soon as the target reports a stop. */
1657 init_wait_for_inferior ();
1658 clear_proceed_status ();
1660 /* No traps are generated when attaching to inferior under Mach 3
1662 #ifndef ATTACH_NO_WAIT
1663 stop_soon_quietly
= 1;
1664 wait_for_inferior ();
1668 * If no exec file is yet known, try to determine it from the
1671 exec_file
= (char *) get_exec_file (0);
1674 exec_file
= target_pid_to_exec_file (inferior_pid
);
1677 /* It's possible we don't have a full path, but rather just a
1678 filename. Some targets, such as HP-UX, don't provide the
1681 Attempt to qualify the filename against the source path.
1682 (If that fails, we'll just fall back on the original
1683 filename. Not much more we can do...)
1685 if (!source_full_path_of (exec_file
, &full_exec_path
))
1686 full_exec_path
= savestring (exec_file
, strlen (exec_file
));
1688 exec_file_attach (full_exec_path
, from_tty
);
1689 symbol_file_command (full_exec_path
, from_tty
);
1696 /* Add shared library symbols from the newly attached process, if any. */
1697 SOLIB_ADD ((char *) 0, from_tty
, ¤t_target
);
1698 re_enable_breakpoints_in_shlibs ();
1702 /* Take any necessary post-attaching actions for this platform.
1704 target_post_attach (inferior_pid
);
1714 * takes a program previously attached to and detaches it.
1715 * The program resumes execution and will no longer stop
1716 * on signals, etc. We better not have left any breakpoints
1717 * in the program or it'll die when it hits one. For this
1718 * to work, it may be necessary for the process to have been
1719 * previously attached. It *might* work if the program was
1720 * started via the normal ptrace (PTRACE_TRACEME).
1724 detach_command (char *args
, int from_tty
)
1726 dont_repeat (); /* Not for the faint of heart */
1727 target_detach (args
, from_tty
);
1728 #if defined(SOLIB_RESTART)
1735 /* Stop the execution of the target while running in async mode, in
1739 interrupt_target_command_wrapper (char *args
, int from_tty
)
1741 interrupt_target_command (args
, from_tty
);
1745 interrupt_target_command (char *args
, int from_tty
)
1747 if (event_loop_p
&& target_can_async_p ())
1749 dont_repeat (); /* Not for the faint of heart */
1756 float_info (char *addr_exp
, int from_tty
)
1761 printf_filtered ("No floating point info available for this processor.\n");
1767 unset_command (char *args
, int from_tty
)
1769 printf_filtered ("\"unset\" must be followed by the name of ");
1770 printf_filtered ("an unset subcommand.\n");
1771 help_list (unsetlist
, "unset ", -1, gdb_stdout
);
1775 _initialize_infcmd (void)
1777 struct cmd_list_element
*c
;
1779 add_com ("tty", class_run
, tty_command
,
1780 "Set terminal for future runs of program being debugged.");
1783 (add_set_cmd ("args", class_run
, var_string_noescape
,
1784 (char *) &inferior_args
,
1785 "Set argument list to give program being debugged when it is started.\n\
1786 Follow this command with any number of args, to be passed to the program.",
1791 ("environment", no_class
, environment_info
,
1792 "The environment to give the program, or one variable's value.\n\
1793 With an argument VAR, prints the value of environment variable VAR to\n\
1794 give the program being debugged. With no arguments, prints the entire\n\
1795 environment to be given to the program.", &showlist
);
1796 c
->completer
= noop_completer
;
1798 add_prefix_cmd ("unset", no_class
, unset_command
,
1799 "Complement to certain \"set\" commands",
1800 &unsetlist
, "unset ", 0, &cmdlist
);
1802 c
= add_cmd ("environment", class_run
, unset_environment_command
,
1803 "Cancel environment variable VAR for the program.\n\
1804 This does not affect the program until the next \"run\" command.",
1806 c
->completer
= noop_completer
;
1808 c
= add_cmd ("environment", class_run
, set_environment_command
,
1809 "Set environment variable value to give the program.\n\
1810 Arguments are VAR VALUE where VAR is variable name and VALUE is value.\n\
1811 VALUES of environment variables are uninterpreted strings.\n\
1812 This does not affect the program until the next \"run\" command.",
1814 c
->completer
= noop_completer
;
1816 add_com ("path", class_files
, path_command
,
1817 "Add directory DIR(s) to beginning of search path for object files.\n\
1818 $cwd in the path means the current working directory.\n\
1819 This path is equivalent to the $PATH shell variable. It is a list of\n\
1820 directories, separated by colons. These directories are searched to find\n\
1821 fully linked executable files and separately compiled object files as needed.");
1823 c
= add_cmd ("paths", no_class
, path_info
,
1824 "Current search path for finding object files.\n\
1825 $cwd in the path means the current working directory.\n\
1826 This path is equivalent to the $PATH shell variable. It is a list of\n\
1827 directories, separated by colons. These directories are searched to find\n\
1828 fully linked executable files and separately compiled object files as needed.",
1830 c
->completer
= noop_completer
;
1832 add_com ("attach", class_run
, attach_command
,
1833 "Attach to a process or file outside of GDB.\n\
1834 This command attaches to another target, of the same type as your last\n\
1835 \"target\" command (\"info files\" will show your target stack).\n\
1836 The command may take as argument a process id or a device file.\n\
1837 For a process id, you must have permission to send the process a signal,\n\
1838 and it must have the same effective uid as the debugger.\n\
1839 When using \"attach\" with a process id, the debugger finds the\n\
1840 program running in the process, looking first in the current working\n\
1841 directory, or (if not found there) using the source file search path\n\
1842 (see the \"directory\" command). You can also use the \"file\" command\n\
1843 to specify the program, and to load its symbol table.");
1845 add_com ("detach", class_run
, detach_command
,
1846 "Detach a process or file previously attached.\n\
1847 If a process, it is no longer traced, and it continues its execution. If\n\
1848 you were debugging a file, the file is closed and gdb no longer accesses it.");
1850 add_com ("signal", class_run
, signal_command
,
1851 "Continue program giving it signal specified by the argument.\n\
1852 An argument of \"0\" means continue program without giving it a signal.");
1854 add_com ("stepi", class_run
, stepi_command
,
1855 "Step one instruction exactly.\n\
1856 Argument N means do this N times (or till program stops for another reason).");
1857 add_com_alias ("si", "stepi", class_alias
, 0);
1859 add_com ("nexti", class_run
, nexti_command
,
1860 "Step one instruction, but proceed through subroutine calls.\n\
1861 Argument N means do this N times (or till program stops for another reason).");
1862 add_com_alias ("ni", "nexti", class_alias
, 0);
1864 add_com ("finish", class_run
, finish_command
,
1865 "Execute until selected stack frame returns.\n\
1866 Upon return, the value returned is printed and put in the value history.");
1868 add_com ("next", class_run
, next_command
,
1869 "Step program, proceeding through subroutine calls.\n\
1870 Like the \"step\" command as long as subroutine calls do not happen;\n\
1871 when they do, the call is treated as one instruction.\n\
1872 Argument N means do this N times (or till program stops for another reason).");
1873 add_com_alias ("n", "next", class_run
, 1);
1875 add_com_alias ("S", "next", class_run
, 1);
1877 add_com ("step", class_run
, step_command
,
1878 "Step program until it reaches a different source line.\n\
1879 Argument N means do this N times (or till program stops for another reason).");
1880 add_com_alias ("s", "step", class_run
, 1);
1882 add_com ("until", class_run
, until_command
,
1883 "Execute until the program reaches a source line greater than the current\n\
1884 or a specified line or address or function (same args as break command).\n\
1885 Execution will also stop upon exit from the current stack frame.");
1886 add_com_alias ("u", "until", class_run
, 1);
1888 add_com ("jump", class_run
, jump_command
,
1889 "Continue program being debugged at specified line or address.\n\
1890 Give as argument either LINENUM or *ADDR, where ADDR is an expression\n\
1891 for an address to start at.");
1894 add_com ("go", class_run
, go_command
,
1895 "Usage: go <location>\n\
1896 Continue program being debugged, stopping at specified line or \n\
1898 Give as argument either LINENUM or *ADDR, where ADDR is an \n\
1899 expression for an address to start at.\n\
1900 This command is a combination of tbreak and jump.");
1903 add_com_alias ("g", "go", class_run
, 1);
1905 add_com ("continue", class_run
, continue_command
,
1906 "Continue program being debugged, after signal or breakpoint.\n\
1907 If proceeding from breakpoint, a number N may be used as an argument,\n\
1908 which means to set the ignore count of that breakpoint to N - 1 (so that\n\
1909 the breakpoint won't break until the Nth time it is reached).");
1910 add_com_alias ("c", "cont", class_run
, 1);
1911 add_com_alias ("fg", "cont", class_run
, 1);
1913 add_com ("run", class_run
, run_command
,
1914 "Start debugged program. You may specify arguments to give it.\n\
1915 Args may include \"*\", or \"[...]\"; they are expanded using \"sh\".\n\
1916 Input and output redirection with \">\", \"<\", or \">>\" are also allowed.\n\n\
1917 With no arguments, uses arguments last specified (with \"run\" or \"set args\").\n\
1918 To cancel previous arguments and run with no arguments,\n\
1919 use \"set args\" without arguments.");
1920 add_com_alias ("r", "run", class_run
, 1);
1922 add_com ("R", class_run
, run_no_args_command
,
1923 "Start debugged program with no arguments.");
1925 add_com ("interrupt", class_run
, interrupt_target_command
,
1926 "Interrupt the execution of the debugged program.");
1928 add_info ("registers", nofp_registers_info
,
1929 "List of integer registers and their contents, for selected stack frame.\n\
1930 Register name as argument means describe only that register.");
1931 add_info_alias ("r", "registers", 1);
1934 add_com ("lr", class_info
, nofp_registers_info
,
1935 "List of integer registers and their contents, for selected stack frame.\n\
1936 Register name as argument means describe only that register.");
1937 add_info ("all-registers", all_registers_info
,
1938 "List of all registers and their contents, for selected stack frame.\n\
1939 Register name as argument means describe only that register.");
1941 add_info ("program", program_info
,
1942 "Execution status of the program.");
1944 add_info ("float", float_info
,
1945 "Print the status of the floating point unit\n");
1947 inferior_args
= savestring ("", 1); /* Initially no args */
1948 inferior_environ
= make_environ ();
1949 init_environ (inferior_environ
);