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
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"
47 /* Functions exported for general use, in inferior.h: */
49 void all_registers_info (char *, int);
51 void registers_info (char *, int);
53 void nexti_command (char *, int);
55 void stepi_command (char *, int);
57 void continue_command (char *, int);
59 void interrupt_target_command (char *args
, int from_tty
);
61 /* Local functions: */
63 static void nofp_registers_info (char *, int);
65 static void print_return_value (int struct_return
, struct type
*value_type
);
67 static void finish_command_continuation (struct continuation_arg
*);
69 static void until_next_command (int);
71 static void until_command (char *, int);
73 static void path_info (char *, int);
75 static void path_command (char *, int);
77 static void unset_command (char *, int);
79 static void float_info (char *, int);
81 static void detach_command (char *, int);
83 static void unset_environment_command (char *, int);
85 static void set_environment_command (char *, int);
87 static void environment_info (char *, int);
89 static void program_info (char *, int);
91 static void finish_command (char *, int);
93 static void signal_command (char *, int);
95 static void jump_command (char *, int);
97 static void step_1 (int, int, char *);
98 static void step_once (int skip_subroutines
, int single_inst
, int count
);
99 static void step_1_continuation (struct continuation_arg
*arg
);
101 static void next_command (char *, int);
103 static void step_command (char *, int);
105 static void run_command (char *, int);
107 static void run_no_args_command (char *args
, int from_tty
);
109 static void go_command (char *line_no
, int from_tty
);
111 static int strip_bg_char (char **);
113 void _initialize_infcmd (void);
115 #define GO_USAGE "Usage: go <location>\n"
117 static void breakpoint_auto_delete_contents (void *);
119 #define ERROR_NO_INFERIOR \
120 if (!target_has_execution) error ("The program is not being run.");
122 /* String containing arguments to give to the program, separated by spaces.
123 Empty string (pointer to '\0') means no args. */
125 static char *inferior_args
;
127 /* The inferior arguments as a vector. If INFERIOR_ARGC is nonzero,
128 then we must compute INFERIOR_ARGS from this (via the target). */
130 static int inferior_argc
;
131 static char **inferior_argv
;
133 /* File name for default use for standard in/out in the inferior. */
135 char *inferior_io_terminal
;
137 /* Pid of our debugged inferior, or 0 if no inferior now.
138 Since various parts of infrun.c test this to see whether there is a program
139 being debugged it should be nonzero (currently 3 is used) for remote
142 ptid_t inferior_ptid
;
144 /* Last signal that the inferior received (why it stopped). */
146 enum target_signal stop_signal
;
148 /* Address at which inferior stopped. */
152 /* Chain containing status of breakpoint(s) that we have stopped at. */
156 /* Flag indicating that a command has proceeded the inferior past the
157 current breakpoint. */
159 int breakpoint_proceeded
;
161 /* Nonzero if stopped due to a step command. */
165 /* Nonzero if stopped due to completion of a stack dummy routine. */
167 int stop_stack_dummy
;
169 /* Nonzero if stopped due to a random (unexpected) signal in inferior
172 int stopped_by_random_signal
;
174 /* Range to single step within.
175 If this is nonzero, respond to a single-step signal
176 by continuing to step if the pc is in this range. */
178 CORE_ADDR step_range_start
; /* Inclusive */
179 CORE_ADDR step_range_end
; /* Exclusive */
181 /* Stack frame address as of when stepping command was issued.
182 This is how we know when we step into a subroutine call,
183 and how to set the frame for the breakpoint used to step out. */
185 struct frame_id step_frame_id
;
187 /* Our notion of the current stack pointer. */
191 enum step_over_calls_kind step_over_calls
;
193 /* If stepping, nonzero means step count is > 1
194 so don't print frame next time inferior stops
195 if it stops due to stepping. */
199 /* Environment to use for running inferior,
200 in format described in environ.h. */
202 struct environ
*inferior_environ
;
204 /* Accessor routines. */
207 get_inferior_args (void)
209 if (inferior_argc
!= 0)
213 n
= gdbarch_construct_inferior_arguments (current_gdbarch
,
214 inferior_argc
, inferior_argv
);
215 old
= set_inferior_args (n
);
219 if (inferior_args
== NULL
)
220 inferior_args
= xstrdup ("");
222 return inferior_args
;
226 set_inferior_args (char *newargs
)
228 char *saved_args
= inferior_args
;
230 inferior_args
= newargs
;
238 set_inferior_args_vector (int argc
, char **argv
)
240 inferior_argc
= argc
;
241 inferior_argv
= argv
;
244 /* Notice when `set args' is run. */
246 notice_args_set (char *args
, int from_tty
, struct cmd_list_element
*c
)
252 /* Notice when `show args' is run. */
254 notice_args_read (char *args
, int from_tty
, struct cmd_list_element
*c
)
256 /* Might compute the value. */
257 get_inferior_args ();
261 /* Compute command-line string given argument vector. This does the
262 same shell processing as fork_inferior. */
265 construct_inferior_arguments (struct gdbarch
*gdbarch
, int argc
, char **argv
)
269 if (STARTUP_WITH_SHELL
)
271 /* This holds all the characters considered special to the
272 typical Unix shells. We include `^' because the SunOS
273 /bin/sh treats it as a synonym for `|'. */
274 char *special
= "\"!#$&*()\\|[]{}<>?'\"`~^; \t\n";
279 /* We over-compute the size. It shouldn't matter. */
280 for (i
= 0; i
< argc
; ++i
)
281 length
+= 2 * strlen (argv
[i
]) + 1 + 2 * (argv
[i
][0] == '\0');
283 result
= (char *) xmalloc (length
);
286 for (i
= 0; i
< argc
; ++i
)
291 /* Need to handle empty arguments specially. */
292 if (argv
[i
][0] == '\0')
299 for (cp
= argv
[i
]; *cp
; ++cp
)
301 if (strchr (special
, *cp
) != NULL
)
311 /* In this case we can't handle arguments that contain spaces,
312 tabs, or newlines -- see breakup_args(). */
316 for (i
= 0; i
< argc
; ++i
)
318 char *cp
= strchr (argv
[i
], ' ');
320 cp
= strchr (argv
[i
], '\t');
322 cp
= strchr (argv
[i
], '\n');
324 error ("can't handle command-line argument containing whitespace");
325 length
+= strlen (argv
[i
]) + 1;
328 result
= (char *) xmalloc (length
);
330 for (i
= 0; i
< argc
; ++i
)
333 strcat (result
, " ");
334 strcat (result
, argv
[i
]);
342 /* This function detects whether or not a '&' character (indicating
343 background execution) has been added as *the last* of the arguments ARGS
344 of a command. If it has, it removes it and returns 1. Otherwise it
345 does nothing and returns 0. */
347 strip_bg_char (char **args
)
351 p
= strchr (*args
, '&');
355 if (p
== (*args
+ strlen (*args
) - 1))
357 if (strlen (*args
) > 1)
361 while (*p
== ' ' || *p
== '\t');
374 tty_command (char *file
, int from_tty
)
377 error_no_arg ("terminal name for running target process");
379 inferior_io_terminal
= savestring (file
, strlen (file
));
383 run_command (char *args
, int from_tty
)
389 if (! ptid_equal (inferior_ptid
, null_ptid
) && target_has_execution
)
392 && !query ("The program being debugged has been started already.\n\
393 Start it from the beginning? "))
394 error ("Program not restarted.");
396 #if defined(SOLIB_RESTART)
399 init_wait_for_inferior ();
402 clear_breakpoint_hit_counts ();
404 /* Purge old solib objfiles. */
405 objfile_purge_solibs ();
407 do_run_cleanups (NULL
);
409 /* The comment here used to read, "The exec file is re-read every
410 time we do a generic_mourn_inferior, so we just have to worry
411 about the symbol file." The `generic_mourn_inferior' function
412 gets called whenever the program exits. However, suppose the
413 program exits, and *then* the executable file changes? We need
414 to check again here. Since reopen_exec_file doesn't do anything
415 if the timestamp hasn't changed, I don't see the harm. */
419 exec_file
= (char *) get_exec_file (0);
421 /* We keep symbols from add-symbol-file, on the grounds that the
422 user might want to add some symbols before running the program
423 (right?). But sometimes (dynamic loading where the user manually
424 introduces the new symbols with add-symbol-file), the code which
425 the symbols describe does not persist between runs. Currently
426 the user has to manually nuke all symbols between runs if they
427 want them to go away (PR 2207). This is probably reasonable. */
431 if (event_loop_p
&& target_can_async_p ())
432 async_disable_stdin ();
436 int async_exec
= strip_bg_char (&args
);
438 /* If we get a request for running in the bg but the target
439 doesn't support it, error out. */
440 if (event_loop_p
&& async_exec
&& !target_can_async_p ())
441 error ("Asynchronous execution not supported on this target.");
443 /* If we don't get a request of running in the bg, then we need
444 to simulate synchronous (fg) execution. */
445 if (event_loop_p
&& !async_exec
&& target_can_async_p ())
447 /* Simulate synchronous execution */
448 async_disable_stdin ();
451 /* If there were other args, beside '&', process them. */
454 char *old_args
= set_inferior_args (xstrdup (args
));
461 ui_out_field_string (uiout
, NULL
, "Starting program");
462 ui_out_text (uiout
, ": ");
464 ui_out_field_string (uiout
, "execfile", exec_file
);
465 ui_out_spaces (uiout
, 1);
466 /* We call get_inferior_args() because we might need to compute
468 ui_out_field_string (uiout
, "infargs", get_inferior_args ());
469 ui_out_text (uiout
, "\n");
470 ui_out_flush (uiout
);
473 /* We call get_inferior_args() because we might need to compute
475 target_create_inferior (exec_file
, get_inferior_args (),
476 environ_vector (inferior_environ
));
481 run_no_args_command (char *args
, int from_tty
)
483 char *old_args
= set_inferior_args (xstrdup (""));
489 continue_command (char *proc_count_exp
, int from_tty
)
494 /* Find out whether we must run in the background. */
495 if (proc_count_exp
!= NULL
)
496 async_exec
= strip_bg_char (&proc_count_exp
);
498 /* If we must run in the background, but the target can't do it,
500 if (event_loop_p
&& async_exec
&& !target_can_async_p ())
501 error ("Asynchronous execution not supported on this target.");
503 /* If we are not asked to run in the bg, then prepare to run in the
504 foreground, synchronously. */
505 if (event_loop_p
&& !async_exec
&& target_can_async_p ())
507 /* Simulate synchronous execution */
508 async_disable_stdin ();
511 /* If have argument (besides '&'), set proceed count of breakpoint
513 if (proc_count_exp
!= NULL
)
515 bpstat bs
= stop_bpstat
;
516 int num
= bpstat_num (&bs
);
517 if (num
== 0 && from_tty
)
520 ("Not stopped at any breakpoint; argument ignored.\n");
524 set_ignore_count (num
,
525 parse_and_eval_long (proc_count_exp
) - 1,
527 /* set_ignore_count prints a message ending with a period.
528 So print two spaces before "Continuing.". */
530 printf_filtered (" ");
531 num
= bpstat_num (&bs
);
536 printf_filtered ("Continuing.\n");
538 clear_proceed_status ();
540 proceed ((CORE_ADDR
) -1, TARGET_SIGNAL_DEFAULT
, 0);
543 /* Step until outside of current statement. */
547 step_command (char *count_string
, int from_tty
)
549 step_1 (0, 0, count_string
);
552 /* Likewise, but skip over subroutine calls as if single instructions. */
556 next_command (char *count_string
, int from_tty
)
558 step_1 (1, 0, count_string
);
561 /* Likewise, but step only one instruction. */
565 stepi_command (char *count_string
, int from_tty
)
567 step_1 (0, 1, count_string
);
572 nexti_command (char *count_string
, int from_tty
)
574 step_1 (1, 1, count_string
);
578 disable_longjmp_breakpoint_cleanup (void *ignore
)
580 disable_longjmp_breakpoint ();
584 step_1 (int skip_subroutines
, int single_inst
, char *count_string
)
586 register int count
= 1;
587 struct frame_info
*frame
;
588 struct cleanup
*cleanups
= 0;
594 async_exec
= strip_bg_char (&count_string
);
596 /* If we get a request for running in the bg but the target
597 doesn't support it, error out. */
598 if (event_loop_p
&& async_exec
&& !target_can_async_p ())
599 error ("Asynchronous execution not supported on this target.");
601 /* If we don't get a request of running in the bg, then we need
602 to simulate synchronous (fg) execution. */
603 if (event_loop_p
&& !async_exec
&& target_can_async_p ())
605 /* Simulate synchronous execution */
606 async_disable_stdin ();
609 count
= count_string
? parse_and_eval_long (count_string
) : 1;
611 if (!single_inst
|| skip_subroutines
) /* leave si command alone */
613 enable_longjmp_breakpoint ();
614 if (!event_loop_p
|| !target_can_async_p ())
615 cleanups
= make_cleanup (disable_longjmp_breakpoint_cleanup
, 0 /*ignore*/);
617 make_exec_cleanup (disable_longjmp_breakpoint_cleanup
, 0 /*ignore*/);
620 /* In synchronous case, all is well, just use the regular for loop. */
621 if (!event_loop_p
|| !target_can_async_p ())
623 for (; count
> 0; count
--)
625 clear_proceed_status ();
627 frame
= get_current_frame ();
628 if (!frame
) /* Avoid coredump here. Why tho? */
629 error ("No current frame");
630 step_frame_id
= get_frame_id (frame
);
631 step_sp
= read_sp ();
635 find_pc_line_pc_range (stop_pc
, &step_range_start
, &step_range_end
);
636 if (step_range_end
== 0)
639 if (find_pc_partial_function (stop_pc
, &name
, &step_range_start
,
640 &step_range_end
) == 0)
641 error ("Cannot find bounds of current function");
643 target_terminal_ours ();
645 Single stepping until exit from function %s, \n\
646 which has no line number information.\n", name
);
651 /* Say we are stepping, but stop after one insn whatever it does. */
652 step_range_start
= step_range_end
= 1;
653 if (!skip_subroutines
)
655 Don't step over function calls, not even to functions lacking
657 step_over_calls
= STEP_OVER_NONE
;
660 if (skip_subroutines
)
661 step_over_calls
= STEP_OVER_ALL
;
663 step_multi
= (count
> 1);
664 proceed ((CORE_ADDR
) -1, TARGET_SIGNAL_DEFAULT
, 1);
669 /* FIXME: On nexti, this may have already been done (when we hit the
670 step resume break, I think). Probably this should be moved to
671 wait_for_inferior (near the top). */
672 #if defined (SHIFT_INST_REGS)
677 if (!single_inst
|| skip_subroutines
)
678 do_cleanups (cleanups
);
681 /* In case of asynchronous target things get complicated, do only
682 one step for now, before returning control to the event loop. Let
683 the continuation figure out how many other steps we need to do,
684 and handle them one at the time, through step_once(). */
687 if (event_loop_p
&& target_can_async_p ())
688 step_once (skip_subroutines
, single_inst
, count
);
692 /* Called after we are done with one step operation, to check whether
693 we need to step again, before we print the prompt and return control
694 to the user. If count is > 1, we will need to do one more call to
695 proceed(), via step_once(). Basically it is like step_once and
696 step_1_continuation are co-recursive. */
698 step_1_continuation (struct continuation_arg
*arg
)
701 int skip_subroutines
;
704 skip_subroutines
= arg
->data
.integer
;
705 single_inst
= arg
->next
->data
.integer
;
706 count
= arg
->next
->next
->data
.integer
;
710 /* FIXME: On nexti, this may have already been done (when we hit the
711 step resume break, I think). Probably this should be moved to
712 wait_for_inferior (near the top). */
713 #if defined (SHIFT_INST_REGS)
716 step_once (skip_subroutines
, single_inst
, count
- 1);
719 if (!single_inst
|| skip_subroutines
)
720 do_exec_cleanups (ALL_CLEANUPS
);
723 /* Do just one step operation. If count >1 we will have to set up a
724 continuation to be done after the target stops (after this one
725 step). This is useful to implement the 'step n' kind of commands, in
726 case of asynchronous targets. We had to split step_1 into two parts,
727 one to be done before proceed() and one afterwards. This function is
728 called in case of step n with n>1, after the first step operation has
731 step_once (int skip_subroutines
, int single_inst
, int count
)
733 struct continuation_arg
*arg1
;
734 struct continuation_arg
*arg2
;
735 struct continuation_arg
*arg3
;
736 struct frame_info
*frame
;
740 clear_proceed_status ();
742 frame
= get_current_frame ();
743 if (!frame
) /* Avoid coredump here. Why tho? */
744 error ("No current frame");
745 step_frame_id
= get_frame_id (frame
);
746 step_sp
= read_sp ();
750 find_pc_line_pc_range (stop_pc
, &step_range_start
, &step_range_end
);
752 /* If we have no line info, switch to stepi mode. */
753 if (step_range_end
== 0 && step_stop_if_no_debug
)
755 step_range_start
= step_range_end
= 1;
757 else if (step_range_end
== 0)
760 if (find_pc_partial_function (stop_pc
, &name
, &step_range_start
,
761 &step_range_end
) == 0)
762 error ("Cannot find bounds of current function");
764 target_terminal_ours ();
766 Single stepping until exit from function %s, \n\
767 which has no line number information.\n", name
);
772 /* Say we are stepping, but stop after one insn whatever it does. */
773 step_range_start
= step_range_end
= 1;
774 if (!skip_subroutines
)
776 Don't step over function calls, not even to functions lacking
778 step_over_calls
= STEP_OVER_NONE
;
781 if (skip_subroutines
)
782 step_over_calls
= STEP_OVER_ALL
;
784 step_multi
= (count
> 1);
786 (struct continuation_arg
*) xmalloc (sizeof (struct continuation_arg
));
788 (struct continuation_arg
*) xmalloc (sizeof (struct continuation_arg
));
790 (struct continuation_arg
*) xmalloc (sizeof (struct continuation_arg
));
792 arg1
->data
.integer
= skip_subroutines
;
794 arg2
->data
.integer
= single_inst
;
796 arg3
->data
.integer
= count
;
797 add_intermediate_continuation (step_1_continuation
, arg1
);
798 proceed ((CORE_ADDR
) -1, TARGET_SIGNAL_DEFAULT
, 1);
803 /* Continue program at specified address. */
806 jump_command (char *arg
, int from_tty
)
808 register CORE_ADDR addr
;
809 struct symtabs_and_lines sals
;
810 struct symtab_and_line sal
;
817 /* Find out whether we must run in the background. */
819 async_exec
= strip_bg_char (&arg
);
821 /* If we must run in the background, but the target can't do it,
823 if (event_loop_p
&& async_exec
&& !target_can_async_p ())
824 error ("Asynchronous execution not supported on this target.");
826 /* If we are not asked to run in the bg, then prepare to run in the
827 foreground, synchronously. */
828 if (event_loop_p
&& !async_exec
&& target_can_async_p ())
830 /* Simulate synchronous execution */
831 async_disable_stdin ();
835 error_no_arg ("starting address");
837 sals
= decode_line_spec_1 (arg
, 1);
840 error ("Unreasonable jump request");
846 if (sal
.symtab
== 0 && sal
.pc
== 0)
847 error ("No source file has been specified.");
849 resolve_sal_pc (&sal
); /* May error out */
851 /* See if we are trying to jump to another function. */
852 fn
= get_frame_function (get_current_frame ());
853 sfn
= find_pc_function (sal
.pc
);
854 if (fn
!= NULL
&& sfn
!= fn
)
856 if (!query ("Line %d is not in `%s'. Jump anyway? ", sal
.line
,
857 SYMBOL_SOURCE_NAME (fn
)))
859 error ("Not confirmed.");
866 fixup_symbol_section (sfn
, 0);
867 if (section_is_overlay (SYMBOL_BFD_SECTION (sfn
)) &&
868 !section_is_mapped (SYMBOL_BFD_SECTION (sfn
)))
870 if (!query ("WARNING!!! Destination is in unmapped overlay! Jump anyway? "))
872 error ("Not confirmed.");
882 printf_filtered ("Continuing at ");
883 print_address_numeric (addr
, 1, gdb_stdout
);
884 printf_filtered (".\n");
887 clear_proceed_status ();
888 proceed (addr
, TARGET_SIGNAL_0
, 0);
892 /* Go to line or address in current procedure */
894 go_command (char *line_no
, int from_tty
)
896 if (line_no
== (char *) NULL
|| !*line_no
)
897 printf_filtered (GO_USAGE
);
900 tbreak_command (line_no
, from_tty
);
901 jump_command (line_no
, from_tty
);
906 /* Continue program giving it specified signal. */
909 signal_command (char *signum_exp
, int from_tty
)
911 enum target_signal oursig
;
913 dont_repeat (); /* Too dangerous. */
917 error_no_arg ("signal number");
919 /* It would be even slicker to make signal names be valid expressions,
920 (the type could be "enum $signal" or some such), then the user could
921 assign them to convenience variables. */
922 oursig
= target_signal_from_name (signum_exp
);
924 if (oursig
== TARGET_SIGNAL_UNKNOWN
)
926 /* No, try numeric. */
927 int num
= parse_and_eval_long (signum_exp
);
930 oursig
= TARGET_SIGNAL_0
;
932 oursig
= target_signal_from_command (num
);
937 if (oursig
== TARGET_SIGNAL_0
)
938 printf_filtered ("Continuing with no signal.\n");
940 printf_filtered ("Continuing with signal %s.\n",
941 target_signal_to_name (oursig
));
944 clear_proceed_status ();
945 /* "signal 0" should not get stuck if we are stopped at a breakpoint.
946 FIXME: Neither should "signal foo" but when I tried passing
947 (CORE_ADDR)-1 unconditionally I got a testsuite failure which I haven't
948 tried to track down yet. */
949 proceed (oursig
== TARGET_SIGNAL_0
? (CORE_ADDR
) -1 : stop_pc
, oursig
, 0);
952 /* Call breakpoint_auto_delete on the current contents of the bpstat
953 pointed to by arg (which is really a bpstat *). */
956 breakpoint_auto_delete_contents (void *arg
)
958 breakpoint_auto_delete (*(bpstat
*) arg
);
962 /* Execute a "stack dummy", a piece of code stored in the stack
963 by the debugger to be executed in the inferior.
965 To call: first, do PUSH_DUMMY_FRAME.
966 Then push the contents of the dummy. It should end with a breakpoint insn.
967 Then call here, passing address at which to start the dummy.
969 The contents of all registers are saved before the dummy frame is popped
970 and copied into the buffer BUFFER.
972 The dummy's frame is automatically popped whenever that break is hit.
973 If that is the first time the program stops, run_stack_dummy
974 returns to its caller with that frame already gone and returns 0.
976 Otherwise, run_stack-dummy returns a non-zero value.
977 If the called function receives a random signal, we do not allow the user
978 to continue executing it as this may not work. The dummy frame is poped
980 If we hit a breakpoint, we leave the frame in place and return 2 (the frame
981 will eventually be popped when we do hit the dummy end breakpoint). */
984 run_stack_dummy (CORE_ADDR addr
, struct regcache
*buffer
)
986 struct cleanup
*old_cleanups
= make_cleanup (null_cleanup
, 0);
989 /* Now proceed, having reached the desired place. */
990 clear_proceed_status ();
992 if (CALL_DUMMY_BREAKPOINT_OFFSET_P
)
994 struct breakpoint
*bpt
;
995 struct symtab_and_line sal
;
997 init_sal (&sal
); /* initialize to zeroes */
998 if (CALL_DUMMY_LOCATION
== AT_ENTRY_POINT
)
1000 sal
.pc
= CALL_DUMMY_ADDRESS ();
1004 /* If defined, CALL_DUMMY_BREAKPOINT_OFFSET is where we need
1005 to put a breakpoint instruction. If not, the call dummy
1006 already has the breakpoint instruction in it.
1008 ADDR IS THE ADDRESS of the call dummy plus the
1009 CALL_DUMMY_START_OFFSET, so we need to subtract the
1010 CALL_DUMMY_START_OFFSET. */
1011 sal
.pc
= addr
- CALL_DUMMY_START_OFFSET
+ CALL_DUMMY_BREAKPOINT_OFFSET
;
1013 sal
.section
= find_pc_overlay (sal
.pc
);
1016 /* Set up a frame ID for the dummy frame so we can pass it to
1017 set_momentary_breakpoint. We need to give the breakpoint a
1018 frame ID so that the breakpoint code can correctly
1019 re-identify the dummy breakpoint. */
1020 struct frame_id frame
= frame_id_build (read_fp (), sal
.pc
);
1021 /* Create a momentary breakpoint at the return address of the
1022 inferior. That way it breaks when it returns. */
1023 bpt
= set_momentary_breakpoint (sal
, frame
, bp_call_dummy
);
1024 bpt
->disposition
= disp_del
;
1027 /* If all error()s out of proceed ended up calling normal_stop (and
1028 perhaps they should; it already does in the special case of error
1029 out of resume()), then we wouldn't need this. */
1030 make_cleanup (breakpoint_auto_delete_contents
, &stop_bpstat
);
1033 disable_watchpoints_before_interactive_call_start ();
1034 proceed_to_finish
= 1; /* We want stop_registers, please... */
1036 if (target_can_async_p ())
1037 saved_async
= target_async_mask (0);
1039 proceed (addr
, TARGET_SIGNAL_0
, 0);
1042 target_async_mask (saved_async
);
1044 enable_watchpoints_after_interactive_call_stop ();
1046 discard_cleanups (old_cleanups
);
1048 /* We can stop during an inferior call because a signal is received. */
1049 if (stopped_by_random_signal
)
1052 /* We may also stop prematurely because we hit a breakpoint in the
1054 if (!stop_stack_dummy
)
1057 /* On normal return, the stack dummy has been popped already. */
1058 regcache_cpy_no_passthrough (buffer
, stop_registers
);
1062 /* Proceed until we reach a different source line with pc greater than
1063 our current one or exit the function. We skip calls in both cases.
1065 Note that eventually this command should probably be changed so
1066 that only source lines are printed out when we hit the breakpoint
1067 we set. This may involve changes to wait_for_inferior and the
1068 proceed status code. */
1072 until_next_command (int from_tty
)
1074 struct frame_info
*frame
;
1076 struct symbol
*func
;
1077 struct symtab_and_line sal
;
1079 clear_proceed_status ();
1081 frame
= get_current_frame ();
1083 /* Step until either exited from this function or greater
1084 than the current line (if in symbolic section) or pc (if
1088 func
= find_pc_function (pc
);
1092 struct minimal_symbol
*msymbol
= lookup_minimal_symbol_by_pc (pc
);
1094 if (msymbol
== NULL
)
1095 error ("Execution is not within a known function.");
1097 step_range_start
= SYMBOL_VALUE_ADDRESS (msymbol
);
1098 step_range_end
= pc
;
1102 sal
= find_pc_line (pc
, 0);
1104 step_range_start
= BLOCK_START (SYMBOL_BLOCK_VALUE (func
));
1105 step_range_end
= sal
.end
;
1108 step_over_calls
= STEP_OVER_ALL
;
1109 step_frame_id
= get_frame_id (frame
);
1110 step_sp
= read_sp ();
1112 step_multi
= 0; /* Only one call to proceed */
1114 proceed ((CORE_ADDR
) -1, TARGET_SIGNAL_DEFAULT
, 1);
1118 until_command (char *arg
, int from_tty
)
1122 if (!target_has_execution
)
1123 error ("The program is not running.");
1125 /* Find out whether we must run in the background. */
1127 async_exec
= strip_bg_char (&arg
);
1129 /* If we must run in the background, but the target can't do it,
1131 if (event_loop_p
&& async_exec
&& !target_can_async_p ())
1132 error ("Asynchronous execution not supported on this target.");
1134 /* If we are not asked to run in the bg, then prepare to run in the
1135 foreground, synchronously. */
1136 if (event_loop_p
&& !async_exec
&& target_can_async_p ())
1138 /* Simulate synchronous execution */
1139 async_disable_stdin ();
1143 until_break_command (arg
, from_tty
, 0);
1145 until_next_command (from_tty
);
1149 advance_command (char *arg
, int from_tty
)
1153 if (!target_has_execution
)
1154 error ("The program is not running.");
1157 error_no_arg ("a location");
1159 /* Find out whether we must run in the background. */
1161 async_exec
= strip_bg_char (&arg
);
1163 /* If we must run in the background, but the target can't do it,
1165 if (event_loop_p
&& async_exec
&& !target_can_async_p ())
1166 error ("Asynchronous execution not supported on this target.");
1168 /* If we are not asked to run in the bg, then prepare to run in the
1169 foreground, synchronously. */
1170 if (event_loop_p
&& !async_exec
&& target_can_async_p ())
1172 /* Simulate synchronous execution. */
1173 async_disable_stdin ();
1176 until_break_command (arg
, from_tty
, 1);
1180 /* Print the result of a function at the end of a 'finish' command. */
1182 print_return_value (int structure_return
, struct type
*value_type
)
1184 struct value
*value
;
1185 static struct ui_stream
*stb
= NULL
;
1187 if (!structure_return
)
1189 value
= value_being_returned (value_type
, stop_registers
, structure_return
);
1190 stb
= ui_out_stream_new (uiout
);
1191 ui_out_text (uiout
, "Value returned is ");
1192 ui_out_field_fmt (uiout
, "gdb-result-var", "$%d", record_latest_value (value
));
1193 ui_out_text (uiout
, " = ");
1194 value_print (value
, stb
->stream
, 0, Val_no_prettyprint
);
1195 ui_out_field_stream (uiout
, "return-value", stb
);
1196 ui_out_text (uiout
, "\n");
1200 /* We cannot determine the contents of the structure because
1201 it is on the stack, and we don't know where, since we did not
1202 initiate the call, as opposed to the call_function_by_hand case */
1203 #ifdef VALUE_RETURNED_FROM_STACK
1205 ui_out_text (uiout
, "Value returned has type: ");
1206 ui_out_field_string (uiout
, "return-type", TYPE_NAME (value_type
));
1207 ui_out_text (uiout
, ".");
1208 ui_out_text (uiout
, " Cannot determine contents\n");
1210 value
= value_being_returned (value_type
, stop_registers
, structure_return
);
1211 stb
= ui_out_stream_new (uiout
);
1212 ui_out_text (uiout
, "Value returned is ");
1213 ui_out_field_fmt (uiout
, "gdb-result-var", "$%d", record_latest_value (value
));
1214 ui_out_text (uiout
, " = ");
1215 value_print (value
, stb
->stream
, 0, Val_no_prettyprint
);
1216 ui_out_field_stream (uiout
, "return-value", stb
);
1217 ui_out_text (uiout
, "\n");
1222 /* Stuff that needs to be done by the finish command after the target
1223 has stopped. In asynchronous mode, we wait for the target to stop in
1224 the call to poll or select in the event loop, so it is impossible to
1225 do all the stuff as part of the finish_command function itself. The
1226 only chance we have to complete this command is in
1227 fetch_inferior_event, which is called by the event loop as soon as it
1228 detects that the target has stopped. This function is called via the
1229 cmd_continuation pointer. */
1231 finish_command_continuation (struct continuation_arg
*arg
)
1233 register struct symbol
*function
;
1234 struct breakpoint
*breakpoint
;
1235 struct cleanup
*cleanups
;
1237 breakpoint
= (struct breakpoint
*) arg
->data
.pointer
;
1238 function
= (struct symbol
*) arg
->next
->data
.pointer
;
1239 cleanups
= (struct cleanup
*) arg
->next
->next
->data
.pointer
;
1241 if (bpstat_find_breakpoint (stop_bpstat
, breakpoint
) != NULL
1244 struct type
*value_type
;
1248 value_type
= TYPE_TARGET_TYPE (SYMBOL_TYPE (function
));
1250 internal_error (__FILE__
, __LINE__
,
1251 "finish_command: function has no target type");
1253 if (TYPE_CODE (value_type
) == TYPE_CODE_VOID
)
1255 do_exec_cleanups (cleanups
);
1259 funcaddr
= BLOCK_START (SYMBOL_BLOCK_VALUE (function
));
1261 struct_return
= using_struct_return (value_of_variable (function
, NULL
),
1263 check_typedef (value_type
),
1264 BLOCK_GCC_COMPILED (SYMBOL_BLOCK_VALUE (function
)));
1266 print_return_value (struct_return
, value_type
);
1268 do_exec_cleanups (cleanups
);
1271 /* "finish": Set a temporary breakpoint at the place
1272 the selected frame will return to, then continue. */
1275 finish_command (char *arg
, int from_tty
)
1277 struct symtab_and_line sal
;
1278 register struct frame_info
*frame
;
1279 register struct symbol
*function
;
1280 struct breakpoint
*breakpoint
;
1281 struct cleanup
*old_chain
;
1282 struct continuation_arg
*arg1
, *arg2
, *arg3
;
1286 /* Find out whether we must run in the background. */
1288 async_exec
= strip_bg_char (&arg
);
1290 /* If we must run in the background, but the target can't do it,
1292 if (event_loop_p
&& async_exec
&& !target_can_async_p ())
1293 error ("Asynchronous execution not supported on this target.");
1295 /* If we are not asked to run in the bg, then prepare to run in the
1296 foreground, synchronously. */
1297 if (event_loop_p
&& !async_exec
&& target_can_async_p ())
1299 /* Simulate synchronous execution */
1300 async_disable_stdin ();
1304 error ("The \"finish\" command does not take any arguments.");
1305 if (!target_has_execution
)
1306 error ("The program is not running.");
1307 if (deprecated_selected_frame
== NULL
)
1308 error ("No selected frame.");
1310 frame
= get_prev_frame (deprecated_selected_frame
);
1312 error ("\"finish\" not meaningful in the outermost frame.");
1314 clear_proceed_status ();
1316 sal
= find_pc_line (get_frame_pc (frame
), 0);
1317 sal
.pc
= get_frame_pc (frame
);
1319 breakpoint
= set_momentary_breakpoint (sal
, get_frame_id (frame
), bp_finish
);
1321 if (!event_loop_p
|| !target_can_async_p ())
1322 old_chain
= make_cleanup_delete_breakpoint (breakpoint
);
1324 old_chain
= make_exec_cleanup_delete_breakpoint (breakpoint
);
1326 /* Find the function we will return from. */
1328 function
= find_pc_function (get_frame_pc (deprecated_selected_frame
));
1330 /* Print info on the selected frame, including level number
1334 printf_filtered ("Run till exit from ");
1335 print_stack_frame (deprecated_selected_frame
,
1336 frame_relative_level (deprecated_selected_frame
), 0);
1339 /* If running asynchronously and the target support asynchronous
1340 execution, set things up for the rest of the finish command to be
1341 completed later on, when gdb has detected that the target has
1342 stopped, in fetch_inferior_event. */
1343 if (event_loop_p
&& target_can_async_p ())
1346 (struct continuation_arg
*) xmalloc (sizeof (struct continuation_arg
));
1348 (struct continuation_arg
*) xmalloc (sizeof (struct continuation_arg
));
1350 (struct continuation_arg
*) xmalloc (sizeof (struct continuation_arg
));
1354 arg1
->data
.pointer
= breakpoint
;
1355 arg2
->data
.pointer
= function
;
1356 arg3
->data
.pointer
= old_chain
;
1357 add_continuation (finish_command_continuation
, arg1
);
1360 proceed_to_finish
= 1; /* We want stop_registers, please... */
1361 proceed ((CORE_ADDR
) -1, TARGET_SIGNAL_DEFAULT
, 0);
1363 /* Do this only if not running asynchronously or if the target
1364 cannot do async execution. Otherwise, complete this command when
1365 the target actually stops, in fetch_inferior_event. */
1366 if (!event_loop_p
|| !target_can_async_p ())
1369 /* Did we stop at our breakpoint? */
1370 if (bpstat_find_breakpoint (stop_bpstat
, breakpoint
) != NULL
1373 struct type
*value_type
;
1377 value_type
= TYPE_TARGET_TYPE (SYMBOL_TYPE (function
));
1379 internal_error (__FILE__
, __LINE__
,
1380 "finish_command: function has no target type");
1382 /* FIXME: Shouldn't we do the cleanups before returning? */
1383 if (TYPE_CODE (value_type
) == TYPE_CODE_VOID
)
1386 funcaddr
= BLOCK_START (SYMBOL_BLOCK_VALUE (function
));
1389 using_struct_return (value_of_variable (function
, NULL
),
1391 check_typedef (value_type
),
1392 BLOCK_GCC_COMPILED (SYMBOL_BLOCK_VALUE (function
)));
1394 print_return_value (struct_return
, value_type
);
1396 do_cleanups (old_chain
);
1402 program_info (char *args
, int from_tty
)
1404 bpstat bs
= stop_bpstat
;
1405 int num
= bpstat_num (&bs
);
1407 if (!target_has_execution
)
1409 printf_filtered ("The program being debugged is not being run.\n");
1413 target_files_info ();
1414 printf_filtered ("Program stopped at %s.\n",
1415 local_hex_string ((unsigned long) stop_pc
));
1417 printf_filtered ("It stopped after being stepped.\n");
1420 /* There may be several breakpoints in the same place, so this
1421 isn't as strange as it seems. */
1426 printf_filtered ("It stopped at a breakpoint that has ");
1427 printf_filtered ("since been deleted.\n");
1430 printf_filtered ("It stopped at breakpoint %d.\n", num
);
1431 num
= bpstat_num (&bs
);
1434 else if (stop_signal
!= TARGET_SIGNAL_0
)
1436 printf_filtered ("It stopped with signal %s, %s.\n",
1437 target_signal_to_name (stop_signal
),
1438 target_signal_to_string (stop_signal
));
1443 printf_filtered ("Type \"info stack\" or \"info registers\" ");
1444 printf_filtered ("for more information.\n");
1449 environment_info (char *var
, int from_tty
)
1453 register char *val
= get_in_environ (inferior_environ
, var
);
1456 puts_filtered (var
);
1457 puts_filtered (" = ");
1458 puts_filtered (val
);
1459 puts_filtered ("\n");
1463 puts_filtered ("Environment variable \"");
1464 puts_filtered (var
);
1465 puts_filtered ("\" not defined.\n");
1470 register char **vector
= environ_vector (inferior_environ
);
1473 puts_filtered (*vector
++);
1474 puts_filtered ("\n");
1480 set_environment_command (char *arg
, int from_tty
)
1482 register char *p
, *val
, *var
;
1486 error_no_arg ("environment variable and value");
1488 /* Find seperation between variable name and value */
1489 p
= (char *) strchr (arg
, '=');
1490 val
= (char *) strchr (arg
, ' ');
1492 if (p
!= 0 && val
!= 0)
1494 /* We have both a space and an equals. If the space is before the
1495 equals, walk forward over the spaces til we see a nonspace
1496 (possibly the equals). */
1501 /* Now if the = is after the char following the spaces,
1502 take the char following the spaces. */
1506 else if (val
!= 0 && p
== 0)
1510 error_no_arg ("environment variable to set");
1512 if (p
== 0 || p
[1] == 0)
1516 p
= arg
+ strlen (arg
); /* So that savestring below will work */
1520 /* Not setting variable value to null */
1522 while (*val
== ' ' || *val
== '\t')
1526 while (p
!= arg
&& (p
[-1] == ' ' || p
[-1] == '\t'))
1529 var
= savestring (arg
, p
- arg
);
1532 printf_filtered ("Setting environment variable ");
1533 printf_filtered ("\"%s\" to null value.\n", var
);
1534 set_in_environ (inferior_environ
, var
, "");
1537 set_in_environ (inferior_environ
, var
, val
);
1542 unset_environment_command (char *var
, int from_tty
)
1546 /* If there is no argument, delete all environment variables.
1547 Ask for confirmation if reading from the terminal. */
1548 if (!from_tty
|| query ("Delete all environment variables? "))
1550 free_environ (inferior_environ
);
1551 inferior_environ
= make_environ ();
1555 unset_in_environ (inferior_environ
, var
);
1558 /* Handle the execution path (PATH variable) */
1560 static const char path_var_name
[] = "PATH";
1564 path_info (char *args
, int from_tty
)
1566 puts_filtered ("Executable and object file path: ");
1567 puts_filtered (get_in_environ (inferior_environ
, path_var_name
));
1568 puts_filtered ("\n");
1571 /* Add zero or more directories to the front of the execution path. */
1574 path_command (char *dirname
, int from_tty
)
1579 env
= get_in_environ (inferior_environ
, path_var_name
);
1580 /* Can be null if path is not set */
1583 exec_path
= xstrdup (env
);
1584 mod_path (dirname
, &exec_path
);
1585 set_in_environ (inferior_environ
, path_var_name
, exec_path
);
1588 path_info ((char *) NULL
, from_tty
);
1592 #ifdef REGISTER_NAMES
1593 char *gdb_register_names
[] = REGISTER_NAMES
;
1595 /* Print out the machine register regnum. If regnum is -1, print all
1596 registers (print_all == 1) or all non-float and non-vector
1597 registers (print_all == 0).
1599 For most machines, having all_registers_info() print the
1600 register(s) one per line is good enough. If a different format is
1601 required, (eg, for MIPS or Pyramid 90x, which both have lots of
1602 regs), or there is an existing convention for showing all the
1603 registers, define the architecture method PRINT_REGISTERS_INFO to
1604 provide that format. */
1607 default_print_registers_info (struct gdbarch
*gdbarch
,
1608 struct ui_file
*file
,
1609 struct frame_info
*frame
,
1610 int regnum
, int print_all
)
1613 const int numregs
= NUM_REGS
+ NUM_PSEUDO_REGS
;
1614 char *raw_buffer
= alloca (MAX_REGISTER_RAW_SIZE
);
1615 char *virtual_buffer
= alloca (MAX_REGISTER_VIRTUAL_SIZE
);
1617 if (DEPRECATED_DO_REGISTERS_INFO_P ())
1619 DEPRECATED_DO_REGISTERS_INFO (regnum
, print_all
);
1623 for (i
= 0; i
< numregs
; i
++)
1625 /* Decide between printing all regs, non-float / vector regs, or
1631 if (!gdbarch_register_reggroup_p (gdbarch
, i
, all_reggroup
))
1636 if (!gdbarch_register_reggroup_p (gdbarch
, i
, general_reggroup
))
1646 /* If the register name is empty, it is undefined for this
1647 processor, so don't display anything. */
1648 if (REGISTER_NAME (i
) == NULL
|| *(REGISTER_NAME (i
)) == '\0')
1651 fputs_filtered (REGISTER_NAME (i
), file
);
1652 print_spaces_filtered (15 - strlen (REGISTER_NAME (i
)), file
);
1654 /* Get the data in raw format. */
1655 if (! frame_register_read (frame
, i
, raw_buffer
))
1657 fprintf_filtered (file
, "*value not available*\n");
1661 /* FIXME: cagney/2002-08-03: This code shouldn't be necessary.
1662 The function frame_register_read() should have returned the
1663 pre-cooked register so no conversion is necessary. */
1664 /* Convert raw data to virtual format if necessary. */
1665 if (REGISTER_CONVERTIBLE (i
))
1667 REGISTER_CONVERT_TO_VIRTUAL (i
, REGISTER_VIRTUAL_TYPE (i
),
1668 raw_buffer
, virtual_buffer
);
1672 memcpy (virtual_buffer
, raw_buffer
,
1673 REGISTER_VIRTUAL_SIZE (i
));
1676 /* If virtual format is floating, print it that way, and in raw
1678 if (TYPE_CODE (REGISTER_VIRTUAL_TYPE (i
)) == TYPE_CODE_FLT
)
1682 val_print (REGISTER_VIRTUAL_TYPE (i
), virtual_buffer
, 0, 0,
1683 file
, 0, 1, 0, Val_pretty_default
);
1685 fprintf_filtered (file
, "\t(raw 0x");
1686 for (j
= 0; j
< REGISTER_RAW_SIZE (i
); j
++)
1689 if (TARGET_BYTE_ORDER
== BFD_ENDIAN_BIG
)
1692 idx
= REGISTER_RAW_SIZE (i
) - 1 - j
;
1693 fprintf_filtered (file
, "%02x", (unsigned char) raw_buffer
[idx
]);
1695 fprintf_filtered (file
, ")");
1699 /* Print the register in hex. */
1700 val_print (REGISTER_VIRTUAL_TYPE (i
), virtual_buffer
, 0, 0,
1701 file
, 'x', 1, 0, Val_pretty_default
);
1702 /* If not a vector register, print it also according to its
1704 if (TYPE_VECTOR (REGISTER_VIRTUAL_TYPE (i
)) == 0)
1706 fprintf_filtered (file
, "\t");
1707 val_print (REGISTER_VIRTUAL_TYPE (i
), virtual_buffer
, 0, 0,
1708 file
, 0, 1, 0, Val_pretty_default
);
1712 fprintf_filtered (file
, "\n");
1717 registers_info (char *addr_exp
, int fpregs
)
1719 int regnum
, numregs
;
1722 if (!target_has_registers
)
1723 error ("The program has no registers now.");
1724 if (deprecated_selected_frame
== NULL
)
1725 error ("No selected frame.");
1729 gdbarch_print_registers_info (current_gdbarch
, gdb_stdout
,
1730 deprecated_selected_frame
, -1, fpregs
);
1734 while (*addr_exp
!= '\0')
1739 /* Keep skipping leading white space. */
1740 if (isspace ((*addr_exp
)))
1746 /* Discard any leading ``$''. Check that there is something
1747 resembling a register following it. */
1748 if (addr_exp
[0] == '$')
1750 if (isspace ((*addr_exp
)) || (*addr_exp
) == '\0')
1751 error ("Missing register name");
1753 /* Find the start/end of this register name/num/group. */
1755 while ((*addr_exp
) != '\0' && !isspace ((*addr_exp
)))
1759 /* Figure out what we've found and display it. */
1761 /* A register name? */
1763 int regnum
= frame_map_name_to_regnum (start
, end
- start
);
1766 gdbarch_print_registers_info (current_gdbarch
, gdb_stdout
,
1767 deprecated_selected_frame
, regnum
, fpregs
);
1772 /* A register number? (how portable is this one?). */
1775 int regnum
= strtol (start
, &endptr
, 0);
1778 && regnum
< NUM_REGS
+ NUM_PSEUDO_REGS
)
1780 gdbarch_print_registers_info (current_gdbarch
, gdb_stdout
,
1781 deprecated_selected_frame
, regnum
, fpregs
);
1786 /* A register group? */
1788 struct reggroup
*const *group
;
1789 for (group
= reggroups (current_gdbarch
);
1793 /* Don't bother with a length check. Should the user
1794 enter a short register group name, go with the first
1795 group that matches. */
1796 if (strncmp (start
, reggroup_name ((*group
)), end
- start
) == 0)
1799 if ((*group
) != NULL
)
1802 for (regnum
= 0; regnum
< NUM_REGS
+ NUM_PSEUDO_REGS
; regnum
++)
1804 if (gdbarch_register_reggroup_p (current_gdbarch
, regnum
,
1806 gdbarch_print_registers_info (current_gdbarch
,
1807 gdb_stdout
, deprecated_selected_frame
,
1814 /* Nothing matched. */
1815 error ("Invalid register `%.*s'", (int) (end
- start
), start
);
1820 all_registers_info (char *addr_exp
, int from_tty
)
1822 registers_info (addr_exp
, 1);
1826 nofp_registers_info (char *addr_exp
, int from_tty
)
1828 registers_info (addr_exp
, 0);
1832 print_vector_info (struct gdbarch
*gdbarch
, struct ui_file
*file
,
1833 struct frame_info
*frame
, const char *args
)
1835 if (!target_has_registers
)
1836 error ("The program has no registers now.");
1837 if (deprecated_selected_frame
== NULL
)
1838 error ("No selected frame.");
1840 if (gdbarch_print_vector_info_p (gdbarch
))
1841 gdbarch_print_vector_info (gdbarch
, file
, frame
, args
);
1845 int printed_something
= 0;
1847 for (regnum
= 0; regnum
< NUM_REGS
+ NUM_PSEUDO_REGS
; regnum
++)
1849 if (gdbarch_register_reggroup_p (gdbarch
, regnum
, vector_reggroup
))
1851 printed_something
= 1;
1852 gdbarch_print_registers_info (gdbarch
, file
, frame
, regnum
, 1);
1855 if (!printed_something
)
1856 fprintf_filtered (file
, "No vector information\n");
1861 vector_info (char *args
, int from_tty
)
1863 print_vector_info (current_gdbarch
, gdb_stdout
, deprecated_selected_frame
, args
);
1869 * Should save/restore the tty state since it might be that the
1870 * program to be debugged was started on this tty and it wants
1871 * the tty in some state other than what we want. If it's running
1872 * on another terminal or without a terminal, then saving and
1873 * restoring the tty state is a harmless no-op.
1874 * This only needs to be done if we are attaching to a process.
1879 takes a program started up outside of gdb and ``attaches'' to it.
1880 This stops it cold in its tracks and allows us to start debugging it.
1881 and wait for the trace-trap that results from attaching. */
1884 attach_command (char *args
, int from_tty
)
1887 char *full_exec_path
= NULL
;
1889 dont_repeat (); /* Not for the faint of heart */
1891 if (target_has_execution
)
1893 if (query ("A program is being debugged already. Kill it? "))
1896 error ("Not killed.");
1899 target_attach (args
, from_tty
);
1901 /* Set up the "saved terminal modes" of the inferior
1902 based on what modes we are starting it with. */
1903 target_terminal_init ();
1905 /* Install inferior's terminal modes. */
1906 target_terminal_inferior ();
1908 /* Set up execution context to know that we should return from
1909 wait_for_inferior as soon as the target reports a stop. */
1910 init_wait_for_inferior ();
1911 clear_proceed_status ();
1913 /* No traps are generated when attaching to inferior under Mach 3
1915 #ifndef ATTACH_NO_WAIT
1916 stop_soon_quietly
= 1;
1917 wait_for_inferior ();
1921 * If no exec file is yet known, try to determine it from the
1924 exec_file
= (char *) get_exec_file (0);
1927 exec_file
= target_pid_to_exec_file (PIDGET (inferior_ptid
));
1930 /* It's possible we don't have a full path, but rather just a
1931 filename. Some targets, such as HP-UX, don't provide the
1934 Attempt to qualify the filename against the source path.
1935 (If that fails, we'll just fall back on the original
1936 filename. Not much more we can do...)
1938 if (!source_full_path_of (exec_file
, &full_exec_path
))
1939 full_exec_path
= savestring (exec_file
, strlen (exec_file
));
1941 exec_file_attach (full_exec_path
, from_tty
);
1942 symbol_file_add_main (full_exec_path
, from_tty
);
1947 /* Add shared library symbols from the newly attached process, if any. */
1948 SOLIB_ADD ((char *) 0, from_tty
, ¤t_target
, auto_solib_add
);
1949 re_enable_breakpoints_in_shlibs ();
1952 /* Take any necessary post-attaching actions for this platform.
1954 target_post_attach (PIDGET (inferior_ptid
));
1964 * takes a program previously attached to and detaches it.
1965 * The program resumes execution and will no longer stop
1966 * on signals, etc. We better not have left any breakpoints
1967 * in the program or it'll die when it hits one. For this
1968 * to work, it may be necessary for the process to have been
1969 * previously attached. It *might* work if the program was
1970 * started via the normal ptrace (PTRACE_TRACEME).
1974 detach_command (char *args
, int from_tty
)
1976 dont_repeat (); /* Not for the faint of heart */
1977 target_detach (args
, from_tty
);
1978 #if defined(SOLIB_RESTART)
1985 /* Stop the execution of the target while running in async mode, in
1988 interrupt_target_command (char *args
, int from_tty
)
1990 if (event_loop_p
&& target_can_async_p ())
1992 dont_repeat (); /* Not for the faint of heart */
1999 print_float_info (struct gdbarch
*gdbarch
, struct ui_file
*file
,
2000 struct frame_info
*frame
, const char *args
)
2002 if (!target_has_registers
)
2003 error ("The program has no registers now.");
2004 if (deprecated_selected_frame
== NULL
)
2005 error ("No selected frame.");
2007 if (gdbarch_print_float_info_p (gdbarch
))
2008 gdbarch_print_float_info (gdbarch
, file
, frame
, args
);
2012 #if GDB_MULTI_ARCH > GDB_MULTI_ARCH_PARTIAL
2013 #error "FLOAT_INFO defined in multi-arch"
2018 int printed_something
= 0;
2020 for (regnum
= 0; regnum
< NUM_REGS
+ NUM_PSEUDO_REGS
; regnum
++)
2022 if (gdbarch_register_reggroup_p (gdbarch
, regnum
, float_reggroup
))
2024 printed_something
= 1;
2025 gdbarch_print_registers_info (gdbarch
, file
, frame
, regnum
, 1);
2028 if (!printed_something
)
2029 fprintf_filtered (file
, "\
2030 No floating-point info available for this processor.\n");
2036 float_info (char *args
, int from_tty
)
2038 print_float_info (current_gdbarch
, gdb_stdout
, deprecated_selected_frame
, args
);
2043 unset_command (char *args
, int from_tty
)
2045 printf_filtered ("\"unset\" must be followed by the name of ");
2046 printf_filtered ("an unset subcommand.\n");
2047 help_list (unsetlist
, "unset ", -1, gdb_stdout
);
2051 _initialize_infcmd (void)
2053 struct cmd_list_element
*c
;
2055 c
= add_com ("tty", class_run
, tty_command
,
2056 "Set terminal for future runs of program being debugged.");
2057 set_cmd_completer (c
, filename_completer
);
2059 c
= add_set_cmd ("args", class_run
, var_string_noescape
,
2060 (char *) &inferior_args
,
2061 "Set argument list to give program being debugged when it is started.\n\
2062 Follow this command with any number of args, to be passed to the program.",
2064 set_cmd_completer (c
, filename_completer
);
2065 set_cmd_sfunc (c
, notice_args_set
);
2066 c
= add_show_from_set (c
, &showlist
);
2067 set_cmd_sfunc (c
, notice_args_read
);
2070 ("environment", no_class
, environment_info
,
2071 "The environment to give the program, or one variable's value.\n\
2072 With an argument VAR, prints the value of environment variable VAR to\n\
2073 give the program being debugged. With no arguments, prints the entire\n\
2074 environment to be given to the program.", &showlist
);
2075 set_cmd_completer (c
, noop_completer
);
2077 add_prefix_cmd ("unset", no_class
, unset_command
,
2078 "Complement to certain \"set\" commands.",
2079 &unsetlist
, "unset ", 0, &cmdlist
);
2081 c
= add_cmd ("environment", class_run
, unset_environment_command
,
2082 "Cancel environment variable VAR for the program.\n\
2083 This does not affect the program until the next \"run\" command.",
2085 set_cmd_completer (c
, noop_completer
);
2087 c
= add_cmd ("environment", class_run
, set_environment_command
,
2088 "Set environment variable value to give the program.\n\
2089 Arguments are VAR VALUE where VAR is variable name and VALUE is value.\n\
2090 VALUES of environment variables are uninterpreted strings.\n\
2091 This does not affect the program until the next \"run\" command.",
2093 set_cmd_completer (c
, noop_completer
);
2095 c
= add_com ("path", class_files
, path_command
,
2096 "Add directory DIR(s) to beginning of search path for object files.\n\
2097 $cwd in the path means the current working directory.\n\
2098 This path is equivalent to the $PATH shell variable. It is a list of\n\
2099 directories, separated by colons. These directories are searched to find\n\
2100 fully linked executable files and separately compiled object files as needed.");
2101 set_cmd_completer (c
, filename_completer
);
2103 c
= add_cmd ("paths", no_class
, path_info
,
2104 "Current search path for finding object files.\n\
2105 $cwd in the path means the current working directory.\n\
2106 This path is equivalent to the $PATH shell variable. It is a list of\n\
2107 directories, separated by colons. These directories are searched to find\n\
2108 fully linked executable files and separately compiled object files as needed.",
2110 set_cmd_completer (c
, noop_completer
);
2112 add_com ("attach", class_run
, attach_command
,
2113 "Attach to a process or file outside of GDB.\n\
2114 This command attaches to another target, of the same type as your last\n\
2115 \"target\" command (\"info files\" will show your target stack).\n\
2116 The command may take as argument a process id or a device file.\n\
2117 For a process id, you must have permission to send the process a signal,\n\
2118 and it must have the same effective uid as the debugger.\n\
2119 When using \"attach\" with a process id, the debugger finds the\n\
2120 program running in the process, looking first in the current working\n\
2121 directory, or (if not found there) using the source file search path\n\
2122 (see the \"directory\" command). You can also use the \"file\" command\n\
2123 to specify the program, and to load its symbol table.");
2125 add_com ("detach", class_run
, detach_command
,
2126 "Detach a process or file previously attached.\n\
2127 If a process, it is no longer traced, and it continues its execution. If\n\
2128 you were debugging a file, the file is closed and gdb no longer accesses it.");
2130 add_com ("signal", class_run
, signal_command
,
2131 "Continue program giving it signal specified by the argument.\n\
2132 An argument of \"0\" means continue program without giving it a signal.");
2134 add_com ("stepi", class_run
, stepi_command
,
2135 "Step one instruction exactly.\n\
2136 Argument N means do this N times (or till program stops for another reason).");
2137 add_com_alias ("si", "stepi", class_alias
, 0);
2139 add_com ("nexti", class_run
, nexti_command
,
2140 "Step one instruction, but proceed through subroutine calls.\n\
2141 Argument N means do this N times (or till program stops for another reason).");
2142 add_com_alias ("ni", "nexti", class_alias
, 0);
2144 add_com ("finish", class_run
, finish_command
,
2145 "Execute until selected stack frame returns.\n\
2146 Upon return, the value returned is printed and put in the value history.");
2148 add_com ("next", class_run
, next_command
,
2149 "Step program, proceeding through subroutine calls.\n\
2150 Like the \"step\" command as long as subroutine calls do not happen;\n\
2151 when they do, the call is treated as one instruction.\n\
2152 Argument N means do this N times (or till program stops for another reason).");
2153 add_com_alias ("n", "next", class_run
, 1);
2155 add_com_alias ("S", "next", class_run
, 1);
2157 add_com ("step", class_run
, step_command
,
2158 "Step program until it reaches a different source line.\n\
2159 Argument N means do this N times (or till program stops for another reason).");
2160 add_com_alias ("s", "step", class_run
, 1);
2162 c
= add_com ("until", class_run
, until_command
,
2163 "Execute until the program reaches a source line greater than the current\n\
2164 or a specified location (same args as break command) within the current frame.");
2165 set_cmd_completer (c
, location_completer
);
2166 add_com_alias ("u", "until", class_run
, 1);
2168 c
= add_com ("advance", class_run
, advance_command
,
2169 "Continue the program up to the given location (same form as args for break command).\n\
2170 Execution will also stop upon exit from the current stack frame.");
2171 set_cmd_completer (c
, location_completer
);
2173 c
= add_com ("jump", class_run
, jump_command
,
2174 "Continue program being debugged at specified line or address.\n\
2175 Give as argument either LINENUM or *ADDR, where ADDR is an expression\n\
2176 for an address to start at.");
2177 set_cmd_completer (c
, location_completer
);
2181 c
= add_com ("go", class_run
, go_command
,
2182 "Usage: go <location>\n\
2183 Continue program being debugged, stopping at specified line or \n\
2185 Give as argument either LINENUM or *ADDR, where ADDR is an \n\
2186 expression for an address to start at.\n\
2187 This command is a combination of tbreak and jump.");
2188 set_cmd_completer (c
, location_completer
);
2192 add_com_alias ("g", "go", class_run
, 1);
2194 add_com ("continue", class_run
, continue_command
,
2195 "Continue program being debugged, after signal or breakpoint.\n\
2196 If proceeding from breakpoint, a number N may be used as an argument,\n\
2197 which means to set the ignore count of that breakpoint to N - 1 (so that\n\
2198 the breakpoint won't break until the Nth time it is reached).");
2199 add_com_alias ("c", "cont", class_run
, 1);
2200 add_com_alias ("fg", "cont", class_run
, 1);
2202 c
= add_com ("run", class_run
, run_command
,
2203 "Start debugged program. You may specify arguments to give it.\n\
2204 Args may include \"*\", or \"[...]\"; they are expanded using \"sh\".\n\
2205 Input and output redirection with \">\", \"<\", or \">>\" are also allowed.\n\n\
2206 With no arguments, uses arguments last specified (with \"run\" or \"set args\").\n\
2207 To cancel previous arguments and run with no arguments,\n\
2208 use \"set args\" without arguments.");
2209 set_cmd_completer (c
, filename_completer
);
2210 add_com_alias ("r", "run", class_run
, 1);
2212 add_com ("R", class_run
, run_no_args_command
,
2213 "Start debugged program with no arguments.");
2215 add_com ("interrupt", class_run
, interrupt_target_command
,
2216 "Interrupt the execution of the debugged program.");
2218 add_info ("registers", 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_alias ("r", "registers", 1);
2224 add_com ("lr", class_info
, nofp_registers_info
,
2225 "List of integer registers and their contents, for selected stack frame.\n\
2226 Register name as argument means describe only that register.");
2227 add_info ("all-registers", all_registers_info
,
2228 "List of all registers and their contents, for selected stack frame.\n\
2229 Register name as argument means describe only that register.");
2231 add_info ("program", program_info
,
2232 "Execution status of the program.");
2234 add_info ("float", float_info
,
2235 "Print the status of the floating point unit\n");
2237 add_info ("vector", vector_info
,
2238 "Print the status of the vector unit\n");
2240 inferior_environ
= make_environ ();
2241 init_environ (inferior_environ
);