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
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"
43 #include "event-top.h"
44 #include "parser-defs.h"
46 /* Functions exported for general use: */
48 void nofp_registers_info (char *, int);
50 void all_registers_info (char *, int);
52 void registers_info (char *, int);
54 /* Local functions: */
56 void continue_command (char *, int);
58 static void print_return_value (int struct_return, struct type *value_type);
60 static void finish_command_continuation (struct continuation_arg *);
62 static void until_next_command (int);
64 static void until_command (char *, int);
66 static void path_info (char *, int);
68 static void path_command (char *, int);
70 static void unset_command (char *, int);
72 static void float_info (char *, int);
74 static void detach_command (char *, int);
76 static void interrupt_target_command (char *args, int from_tty);
78 static void unset_environment_command (char *, int);
80 static void set_environment_command (char *, int);
82 static void environment_info (char *, int);
84 static void program_info (char *, int);
86 static void finish_command (char *, int);
88 static void signal_command (char *, int);
90 static void jump_command (char *, int);
92 static void step_1 (int, int, char *);
93 static void step_once (int skip_subroutines, int single_inst, int count);
94 static void step_1_continuation (struct continuation_arg *arg);
96 void nexti_command (char *, int);
98 void stepi_command (char *, int);
100 static void next_command (char *, int);
102 static void step_command (char *, int);
104 static void run_command (char *, int);
106 static void run_no_args_command (char *args, int from_tty);
108 static void go_command (char *line_no, int from_tty);
110 static int strip_bg_char (char **);
112 void _initialize_infcmd (void);
114 #define GO_USAGE "Usage: go <location>\n"
116 static void breakpoint_auto_delete_contents (PTR);
118 #define ERROR_NO_INFERIOR \
119 if (!target_has_execution) error ("The program is not being run.");
121 /* String containing arguments to give to the program, separated by spaces.
122 Empty string (pointer to '\0') means no args. */
124 static char *inferior_args;
126 /* The inferior arguments as a vector. If INFERIOR_ARGC is nonzero,
127 then we must compute INFERIOR_ARGS from this (via the target). */
129 static int inferior_argc;
130 static char **inferior_argv;
132 /* File name for default use for standard in/out in the inferior. */
134 char *inferior_io_terminal;
136 /* Pid of our debugged inferior, or 0 if no inferior now.
137 Since various parts of infrun.c test this to see whether there is a program
138 being debugged it should be nonzero (currently 3 is used) for remote
141 ptid_t inferior_ptid;
143 /* Last signal that the inferior received (why it stopped). */
145 enum target_signal stop_signal;
147 /* Address at which inferior stopped. */
151 /* Chain containing status of breakpoint(s) that we have stopped at. */
155 /* Flag indicating that a command has proceeded the inferior past the
156 current breakpoint. */
158 int breakpoint_proceeded;
160 /* Nonzero if stopped due to a step command. */
164 /* Nonzero if stopped due to completion of a stack dummy routine. */
166 int stop_stack_dummy;
168 /* Nonzero if stopped due to a random (unexpected) signal in inferior
171 int stopped_by_random_signal;
173 /* Range to single step within.
174 If this is nonzero, respond to a single-step signal
175 by continuing to step if the pc is in this range. */
177 CORE_ADDR step_range_start; /* Inclusive */
178 CORE_ADDR step_range_end; /* Exclusive */
180 /* Stack frame address as of when stepping command was issued.
181 This is how we know when we step into a subroutine call,
182 and how to set the frame for the breakpoint used to step out. */
184 CORE_ADDR step_frame_address;
186 /* Our notion of the current stack pointer. */
190 enum step_over_calls_kind step_over_calls;
192 /* If stepping, nonzero means step count is > 1
193 so don't print frame next time inferior stops
194 if it stops due to stepping. */
198 /* Environment to use for running inferior,
199 in format described in environ.h. */
201 struct environ *inferior_environ;
203 /* Accessor routines. */
206 get_inferior_args (void)
208 if (inferior_argc != 0)
212 n = gdbarch_construct_inferior_arguments (current_gdbarch,
213 inferior_argc, inferior_argv);
214 old = set_inferior_args (n);
218 if (inferior_args == NULL)
219 inferior_args = xstrdup ("");
221 return inferior_args;
225 set_inferior_args (char *newargs)
227 char *saved_args = inferior_args;
229 inferior_args = newargs;
237 set_inferior_args_vector (int argc, char **argv)
239 inferior_argc = argc;
240 inferior_argv = argv;
243 /* Notice when `set args' is run. */
245 notice_args_set (char *args, int from_tty, struct cmd_list_element *c)
251 /* Notice when `show args' is run. */
253 notice_args_read (struct cmd_list_element *c)
255 /* Might compute the value. */
256 get_inferior_args ();
261 /* This function detects whether or not a '&' character (indicating
262 background execution) has been added as *the last* of the arguments ARGS
263 of a command. If it has, it removes it and returns 1. Otherwise it
264 does nothing and returns 0. */
266 strip_bg_char (char **args)
270 p = strchr (*args, '&');
274 if (p == (*args + strlen (*args) - 1))
276 if (strlen (*args) > 1)
280 while (*p == ' ' || *p == '\t');
293 tty_command (char *file, int from_tty)
296 error_no_arg ("terminal name for running target process");
298 inferior_io_terminal = savestring (file, strlen (file));
302 run_command (char *args, int from_tty)
308 if (! ptid_equal (inferior_ptid, null_ptid) && target_has_execution)
311 && !query ("The program being debugged has been started already.\n\
312 Start it from the beginning? "))
313 error ("Program not restarted.");
315 #if defined(SOLIB_RESTART)
318 init_wait_for_inferior ();
321 clear_breakpoint_hit_counts ();
323 exec_file = (char *) get_exec_file (0);
325 /* Purge old solib objfiles. */
326 objfile_purge_solibs ();
328 do_run_cleanups (NULL);
330 /* The exec file is re-read every time we do a generic_mourn_inferior, so
331 we just have to worry about the symbol file. */
334 /* We keep symbols from add-symbol-file, on the grounds that the
335 user might want to add some symbols before running the program
336 (right?). But sometimes (dynamic loading where the user manually
337 introduces the new symbols with add-symbol-file), the code which
338 the symbols describe does not persist between runs. Currently
339 the user has to manually nuke all symbols between runs if they
340 want them to go away (PR 2207). This is probably reasonable. */
344 if (event_loop_p && target_can_async_p ())
345 async_disable_stdin ();
349 int async_exec = strip_bg_char (&args);
351 /* If we get a request for running in the bg but the target
352 doesn't support it, error out. */
353 if (event_loop_p && async_exec && !target_can_async_p ())
354 error ("Asynchronous execution not supported on this target.");
356 /* If we don't get a request of running in the bg, then we need
357 to simulate synchronous (fg) execution. */
358 if (event_loop_p && !async_exec && target_can_async_p ())
360 /* Simulate synchronous execution */
361 async_disable_stdin ();
364 /* If there were other args, beside '&', process them. */
367 char *old_args = set_inferior_args (xstrdup (args));
375 ui_out_field_string (uiout, NULL, "Starting program");
376 ui_out_text (uiout, ": ");
378 ui_out_field_string (uiout, "execfile", exec_file);
379 ui_out_spaces (uiout, 1);
380 /* We call get_inferior_args() because we might need to compute
382 ui_out_field_string (uiout, "infargs", get_inferior_args ());
383 ui_out_text (uiout, "\n");
384 ui_out_flush (uiout);
386 puts_filtered ("Starting program: ");
388 puts_filtered (exec_file);
390 /* We call get_inferior_args() because we might need to compute
392 puts_filtered (get_inferior_args ());
393 puts_filtered ("\n");
394 gdb_flush (gdb_stdout);
398 /* We call get_inferior_args() because we might need to compute
400 target_create_inferior (exec_file, get_inferior_args (),
401 environ_vector (inferior_environ));
406 run_no_args_command (char *args, int from_tty)
408 char *old_args = set_inferior_args (xstrdup (""));
414 continue_command (char *proc_count_exp, int from_tty)
419 /* Find out whether we must run in the background. */
420 if (proc_count_exp != NULL)
421 async_exec = strip_bg_char (&proc_count_exp);
423 /* If we must run in the background, but the target can't do it,
425 if (event_loop_p && async_exec && !target_can_async_p ())
426 error ("Asynchronous execution not supported on this target.");
428 /* If we are not asked to run in the bg, then prepare to run in the
429 foreground, synchronously. */
430 if (event_loop_p && !async_exec && target_can_async_p ())
432 /* Simulate synchronous execution */
433 async_disable_stdin ();
436 /* If have argument (besides '&'), set proceed count of breakpoint
438 if (proc_count_exp != NULL)
440 bpstat bs = stop_bpstat;
441 int num = bpstat_num (&bs);
442 if (num == 0 && from_tty)
445 ("Not stopped at any breakpoint; argument ignored.\n");
449 set_ignore_count (num,
450 parse_and_eval_long (proc_count_exp) - 1,
452 /* set_ignore_count prints a message ending with a period.
453 So print two spaces before "Continuing.". */
455 printf_filtered (" ");
456 num = bpstat_num (&bs);
461 printf_filtered ("Continuing.\n");
463 clear_proceed_status ();
465 proceed ((CORE_ADDR) -1, TARGET_SIGNAL_DEFAULT, 0);
468 /* Step until outside of current statement. */
472 step_command (char *count_string, int from_tty)
474 step_1 (0, 0, count_string);
477 /* Likewise, but skip over subroutine calls as if single instructions. */
481 next_command (char *count_string, int from_tty)
483 step_1 (1, 0, count_string);
486 /* Likewise, but step only one instruction. */
490 stepi_command (char *count_string, int from_tty)
492 step_1 (0, 1, count_string);
497 nexti_command (char *count_string, int from_tty)
499 step_1 (1, 1, count_string);
503 disable_longjmp_breakpoint_cleanup (void *ignore)
505 disable_longjmp_breakpoint ();
509 step_1 (int skip_subroutines, int single_inst, char *count_string)
511 register int count = 1;
512 struct frame_info *frame;
513 struct cleanup *cleanups = 0;
519 async_exec = strip_bg_char (&count_string);
521 /* If we get a request for running in the bg but the target
522 doesn't support it, error out. */
523 if (event_loop_p && async_exec && !target_can_async_p ())
524 error ("Asynchronous execution not supported on this target.");
526 /* If we don't get a request of running in the bg, then we need
527 to simulate synchronous (fg) execution. */
528 if (event_loop_p && !async_exec && target_can_async_p ())
530 /* Simulate synchronous execution */
531 async_disable_stdin ();
534 count = count_string ? parse_and_eval_long (count_string) : 1;
536 if (!single_inst || skip_subroutines) /* leave si command alone */
538 enable_longjmp_breakpoint ();
539 if (!event_loop_p || !target_can_async_p ())
540 cleanups = make_cleanup (disable_longjmp_breakpoint_cleanup, 0 /*ignore*/);
542 make_exec_cleanup (disable_longjmp_breakpoint_cleanup, 0 /*ignore*/);
545 /* In synchronous case, all is well, just use the regular for loop. */
546 if (!event_loop_p || !target_can_async_p ())
548 for (; count > 0; count--)
550 clear_proceed_status ();
552 frame = get_current_frame ();
553 if (!frame) /* Avoid coredump here. Why tho? */
554 error ("No current frame");
555 step_frame_address = FRAME_FP (frame);
556 step_sp = read_sp ();
560 find_pc_line_pc_range (stop_pc, &step_range_start, &step_range_end);
561 if (step_range_end == 0)
564 if (find_pc_partial_function (stop_pc, &name, &step_range_start,
565 &step_range_end) == 0)
566 error ("Cannot find bounds of current function");
568 target_terminal_ours ();
570 Single stepping until exit from function %s, \n\
571 which has no line number information.\n", name);
576 /* Say we are stepping, but stop after one insn whatever it does. */
577 step_range_start = step_range_end = 1;
578 if (!skip_subroutines)
580 Don't step over function calls, not even to functions lacking
582 step_over_calls = STEP_OVER_NONE;
585 if (skip_subroutines)
586 step_over_calls = STEP_OVER_ALL;
588 step_multi = (count > 1);
589 proceed ((CORE_ADDR) -1, TARGET_SIGNAL_DEFAULT, 1);
594 /* FIXME: On nexti, this may have already been done (when we hit the
595 step resume break, I think). Probably this should be moved to
596 wait_for_inferior (near the top). */
597 #if defined (SHIFT_INST_REGS)
602 if (!single_inst || skip_subroutines)
603 do_cleanups (cleanups);
606 /* In case of asynchronous target things get complicated, do only
607 one step for now, before returning control to the event loop. Let
608 the continuation figure out how many other steps we need to do,
609 and handle them one at the time, through step_once(). */
612 if (event_loop_p && target_can_async_p ())
613 step_once (skip_subroutines, single_inst, count);
617 /* Called after we are done with one step operation, to check whether
618 we need to step again, before we print the prompt and return control
619 to the user. If count is > 1, we will need to do one more call to
620 proceed(), via step_once(). Basically it is like step_once and
621 step_1_continuation are co-recursive. */
623 step_1_continuation (struct continuation_arg *arg)
626 int skip_subroutines;
629 skip_subroutines = arg->data.integer;
630 single_inst = arg->next->data.integer;
631 count = arg->next->next->data.integer;
635 /* FIXME: On nexti, this may have already been done (when we hit the
636 step resume break, I think). Probably this should be moved to
637 wait_for_inferior (near the top). */
638 #if defined (SHIFT_INST_REGS)
641 step_once (skip_subroutines, single_inst, count - 1);
644 if (!single_inst || skip_subroutines)
645 do_exec_cleanups (ALL_CLEANUPS);
648 /* Do just one step operation. If count >1 we will have to set up a
649 continuation to be done after the target stops (after this one
650 step). This is useful to implement the 'step n' kind of commands, in
651 case of asynchronous targets. We had to split step_1 into two parts,
652 one to be done before proceed() and one afterwards. This function is
653 called in case of step n with n>1, after the first step operation has
656 step_once (int skip_subroutines, int single_inst, int count)
658 struct continuation_arg *arg1;
659 struct continuation_arg *arg2;
660 struct continuation_arg *arg3;
661 struct frame_info *frame;
665 clear_proceed_status ();
667 frame = get_current_frame ();
668 if (!frame) /* Avoid coredump here. Why tho? */
669 error ("No current frame");
670 step_frame_address = FRAME_FP (frame);
671 step_sp = read_sp ();
675 find_pc_line_pc_range (stop_pc, &step_range_start, &step_range_end);
677 /* If we have no line info, switch to stepi mode. */
678 if (step_range_end == 0 && step_stop_if_no_debug)
680 step_range_start = step_range_end = 1;
682 else if (step_range_end == 0)
685 if (find_pc_partial_function (stop_pc, &name, &step_range_start,
686 &step_range_end) == 0)
687 error ("Cannot find bounds of current function");
689 target_terminal_ours ();
691 Single stepping until exit from function %s, \n\
692 which has no line number information.\n", name);
697 /* Say we are stepping, but stop after one insn whatever it does. */
698 step_range_start = step_range_end = 1;
699 if (!skip_subroutines)
701 Don't step over function calls, not even to functions lacking
703 step_over_calls = STEP_OVER_NONE;
706 if (skip_subroutines)
707 step_over_calls = STEP_OVER_ALL;
709 step_multi = (count > 1);
711 (struct continuation_arg *) xmalloc (sizeof (struct continuation_arg));
713 (struct continuation_arg *) xmalloc (sizeof (struct continuation_arg));
715 (struct continuation_arg *) xmalloc (sizeof (struct continuation_arg));
717 arg1->data.integer = skip_subroutines;
719 arg2->data.integer = single_inst;
721 arg3->data.integer = count;
722 add_intermediate_continuation (step_1_continuation, arg1);
723 proceed ((CORE_ADDR) -1, TARGET_SIGNAL_DEFAULT, 1);
728 /* Continue program at specified address. */
731 jump_command (char *arg, int from_tty)
733 register CORE_ADDR addr;
734 struct symtabs_and_lines sals;
735 struct symtab_and_line sal;
742 /* Find out whether we must run in the background. */
744 async_exec = strip_bg_char (&arg);
746 /* If we must run in the background, but the target can't do it,
748 if (event_loop_p && async_exec && !target_can_async_p ())
749 error ("Asynchronous execution not supported on this target.");
751 /* If we are not asked to run in the bg, then prepare to run in the
752 foreground, synchronously. */
753 if (event_loop_p && !async_exec && target_can_async_p ())
755 /* Simulate synchronous execution */
756 async_disable_stdin ();
760 error_no_arg ("starting address");
762 sals = decode_line_spec_1 (arg, 1);
765 error ("Unreasonable jump request");
771 if (sal.symtab == 0 && sal.pc == 0)
772 error ("No source file has been specified.");
774 resolve_sal_pc (&sal); /* May error out */
776 /* See if we are trying to jump to another function. */
777 fn = get_frame_function (get_current_frame ());
778 sfn = find_pc_function (sal.pc);
779 if (fn != NULL && sfn != fn)
781 if (!query ("Line %d is not in `%s'. Jump anyway? ", sal.line,
782 SYMBOL_SOURCE_NAME (fn)))
784 error ("Not confirmed.");
791 fixup_symbol_section (sfn, 0);
792 if (section_is_overlay (SYMBOL_BFD_SECTION (sfn)) &&
793 !section_is_mapped (SYMBOL_BFD_SECTION (sfn)))
795 if (!query ("WARNING!!! Destination is in unmapped overlay! Jump anyway? "))
797 error ("Not confirmed.");
807 printf_filtered ("Continuing at ");
808 print_address_numeric (addr, 1, gdb_stdout);
809 printf_filtered (".\n");
812 clear_proceed_status ();
813 proceed (addr, TARGET_SIGNAL_0, 0);
817 /* Go to line or address in current procedure */
819 go_command (char *line_no, int from_tty)
821 if (line_no == (char *) NULL || !*line_no)
822 printf_filtered (GO_USAGE);
825 tbreak_command (line_no, from_tty);
826 jump_command (line_no, from_tty);
831 /* Continue program giving it specified signal. */
834 signal_command (char *signum_exp, int from_tty)
836 enum target_signal oursig;
838 dont_repeat (); /* Too dangerous. */
842 error_no_arg ("signal number");
844 /* It would be even slicker to make signal names be valid expressions,
845 (the type could be "enum $signal" or some such), then the user could
846 assign them to convenience variables. */
847 oursig = target_signal_from_name (signum_exp);
849 if (oursig == TARGET_SIGNAL_UNKNOWN)
851 /* No, try numeric. */
852 int num = parse_and_eval_long (signum_exp);
855 oursig = TARGET_SIGNAL_0;
857 oursig = target_signal_from_command (num);
862 if (oursig == TARGET_SIGNAL_0)
863 printf_filtered ("Continuing with no signal.\n");
865 printf_filtered ("Continuing with signal %s.\n",
866 target_signal_to_name (oursig));
869 clear_proceed_status ();
870 /* "signal 0" should not get stuck if we are stopped at a breakpoint.
871 FIXME: Neither should "signal foo" but when I tried passing
872 (CORE_ADDR)-1 unconditionally I got a testsuite failure which I haven't
873 tried to track down yet. */
874 proceed (oursig == TARGET_SIGNAL_0 ? (CORE_ADDR) -1 : stop_pc, oursig, 0);
877 /* Call breakpoint_auto_delete on the current contents of the bpstat
878 pointed to by arg (which is really a bpstat *). */
881 breakpoint_auto_delete_contents (PTR arg)
883 breakpoint_auto_delete (*(bpstat *) arg);
887 /* Execute a "stack dummy", a piece of code stored in the stack
888 by the debugger to be executed in the inferior.
890 To call: first, do PUSH_DUMMY_FRAME.
891 Then push the contents of the dummy. It should end with a breakpoint insn.
892 Then call here, passing address at which to start the dummy.
894 The contents of all registers are saved before the dummy frame is popped
895 and copied into the buffer BUFFER.
897 The dummy's frame is automatically popped whenever that break is hit.
898 If that is the first time the program stops, run_stack_dummy
899 returns to its caller with that frame already gone and returns 0.
901 Otherwise, run_stack-dummy returns a non-zero value.
902 If the called function receives a random signal, we do not allow the user
903 to continue executing it as this may not work. The dummy frame is poped
905 If we hit a breakpoint, we leave the frame in place and return 2 (the frame
906 will eventually be popped when we do hit the dummy end breakpoint). */
909 run_stack_dummy (CORE_ADDR addr, char *buffer)
911 struct cleanup *old_cleanups = make_cleanup (null_cleanup, 0);
914 /* Now proceed, having reached the desired place. */
915 clear_proceed_status ();
917 if (CALL_DUMMY_BREAKPOINT_OFFSET_P)
919 struct breakpoint *bpt;
920 struct symtab_and_line sal;
922 INIT_SAL (&sal); /* initialize to zeroes */
923 if (CALL_DUMMY_LOCATION == AT_ENTRY_POINT)
925 sal.pc = CALL_DUMMY_ADDRESS ();
929 sal.pc = addr - CALL_DUMMY_START_OFFSET + CALL_DUMMY_BREAKPOINT_OFFSET;
931 sal.section = find_pc_overlay (sal.pc);
933 /* Set up a FRAME for the dummy frame so we can pass it to
934 set_momentary_breakpoint. We need to give the breakpoint a
935 frame in case there is only one copy of the dummy (e.g.
936 CALL_DUMMY_LOCATION == AFTER_TEXT_END). */
937 flush_cached_frames ();
938 set_current_frame (create_new_frame (read_fp (), sal.pc));
940 /* If defined, CALL_DUMMY_BREAKPOINT_OFFSET is where we need to put
941 a breakpoint instruction. If not, the call dummy already has the
942 breakpoint instruction in it.
944 addr is the address of the call dummy plus the CALL_DUMMY_START_OFFSET,
945 so we need to subtract the CALL_DUMMY_START_OFFSET. */
946 bpt = set_momentary_breakpoint (sal,
947 get_current_frame (),
949 bpt->disposition = disp_del;
951 /* If all error()s out of proceed ended up calling normal_stop (and
952 perhaps they should; it already does in the special case of error
953 out of resume()), then we wouldn't need this. */
954 make_cleanup (breakpoint_auto_delete_contents, &stop_bpstat);
957 disable_watchpoints_before_interactive_call_start ();
958 proceed_to_finish = 1; /* We want stop_registers, please... */
960 if (target_can_async_p ())
961 saved_async = target_async_mask (0);
963 proceed (addr, TARGET_SIGNAL_0, 0);
966 target_async_mask (saved_async);
968 enable_watchpoints_after_interactive_call_stop ();
970 discard_cleanups (old_cleanups);
972 /* We can stop during an inferior call because a signal is received. */
973 if (stopped_by_random_signal)
976 /* We may also stop prematurely because we hit a breakpoint in the
978 if (!stop_stack_dummy)
981 /* On normal return, the stack dummy has been popped already. */
983 memcpy (buffer, stop_registers, REGISTER_BYTES);
987 /* Proceed until we reach a different source line with pc greater than
988 our current one or exit the function. We skip calls in both cases.
990 Note that eventually this command should probably be changed so
991 that only source lines are printed out when we hit the breakpoint
992 we set. This may involve changes to wait_for_inferior and the
993 proceed status code. */
997 until_next_command (int from_tty)
999 struct frame_info *frame;
1001 struct symbol *func;
1002 struct symtab_and_line sal;
1004 clear_proceed_status ();
1006 frame = get_current_frame ();
1008 /* Step until either exited from this function or greater
1009 than the current line (if in symbolic section) or pc (if
1013 func = find_pc_function (pc);
1017 struct minimal_symbol *msymbol = lookup_minimal_symbol_by_pc (pc);
1019 if (msymbol == NULL)
1020 error ("Execution is not within a known function.");
1022 step_range_start = SYMBOL_VALUE_ADDRESS (msymbol);
1023 step_range_end = pc;
1027 sal = find_pc_line (pc, 0);
1029 step_range_start = BLOCK_START (SYMBOL_BLOCK_VALUE (func));
1030 step_range_end = sal.end;
1033 step_over_calls = STEP_OVER_ALL;
1034 step_frame_address = FRAME_FP (frame);
1035 step_sp = read_sp ();
1037 step_multi = 0; /* Only one call to proceed */
1039 proceed ((CORE_ADDR) -1, TARGET_SIGNAL_DEFAULT, 1);
1043 until_command (char *arg, int from_tty)
1047 if (!target_has_execution)
1048 error ("The program is not running.");
1050 /* Find out whether we must run in the background. */
1052 async_exec = strip_bg_char (&arg);
1054 /* If we must run in the background, but the target can't do it,
1056 if (event_loop_p && async_exec && !target_can_async_p ())
1057 error ("Asynchronous execution not supported on this target.");
1059 /* If we are not asked to run in the bg, then prepare to run in the
1060 foreground, synchronously. */
1061 if (event_loop_p && !async_exec && target_can_async_p ())
1063 /* Simulate synchronous execution */
1064 async_disable_stdin ();
1068 until_break_command (arg, from_tty);
1070 until_next_command (from_tty);
1074 /* Print the result of a function at the end of a 'finish' command. */
1076 print_return_value (int structure_return, struct type *value_type)
1078 struct value *value;
1080 static struct ui_stream *stb = NULL;
1083 if (!structure_return)
1085 value = value_being_returned (value_type, stop_registers, structure_return);
1087 stb = ui_out_stream_new (uiout);
1088 ui_out_text (uiout, "Value returned is ");
1089 ui_out_field_fmt (uiout, "gdb-result-var", "$%d", record_latest_value (value));
1090 ui_out_text (uiout, " = ");
1091 value_print (value, stb->stream, 0, Val_no_prettyprint);
1092 ui_out_field_stream (uiout, "return-value", stb);
1093 ui_out_text (uiout, "\n");
1095 printf_filtered ("Value returned is $%d = ", record_latest_value (value));
1096 value_print (value, gdb_stdout, 0, Val_no_prettyprint);
1097 printf_filtered ("\n");
1102 /* We cannot determine the contents of the structure because
1103 it is on the stack, and we don't know where, since we did not
1104 initiate the call, as opposed to the call_function_by_hand case */
1105 #ifdef VALUE_RETURNED_FROM_STACK
1108 ui_out_text (uiout, "Value returned has type: ");
1109 ui_out_field_string (uiout, "return-type", TYPE_NAME (value_type));
1110 ui_out_text (uiout, ".");
1111 ui_out_text (uiout, " Cannot determine contents\n");
1113 printf_filtered ("Value returned has type: %s.", TYPE_NAME (value_type));
1114 printf_filtered (" Cannot determine contents\n");
1117 value = value_being_returned (value_type, stop_registers, structure_return);
1119 stb = ui_out_stream_new (uiout);
1120 ui_out_text (uiout, "Value returned is ");
1121 ui_out_field_fmt (uiout, "gdb-result-var", "$%d", record_latest_value (value));
1122 ui_out_text (uiout, " = ");
1123 value_print (value, stb->stream, 0, Val_no_prettyprint);
1124 ui_out_field_stream (uiout, "return-value", stb);
1125 ui_out_text (uiout, "\n");
1127 printf_filtered ("Value returned is $%d = ", record_latest_value (value));
1128 value_print (value, gdb_stdout, 0, Val_no_prettyprint);
1129 printf_filtered ("\n");
1135 /* Stuff that needs to be done by the finish command after the target
1136 has stopped. In asynchronous mode, we wait for the target to stop in
1137 the call to poll or select in the event loop, so it is impossible to
1138 do all the stuff as part of the finish_command function itself. The
1139 only chance we have to complete this command is in
1140 fetch_inferior_event, which is called by the event loop as soon as it
1141 detects that the target has stopped. This function is called via the
1142 cmd_continuation pointer. */
1144 finish_command_continuation (struct continuation_arg *arg)
1146 register struct symbol *function;
1147 struct breakpoint *breakpoint;
1148 struct cleanup *cleanups;
1150 breakpoint = (struct breakpoint *) arg->data.pointer;
1151 function = (struct symbol *) arg->next->data.pointer;
1152 cleanups = (struct cleanup *) arg->next->next->data.pointer;
1154 if (bpstat_find_breakpoint (stop_bpstat, breakpoint) != NULL
1157 struct type *value_type;
1161 value_type = TYPE_TARGET_TYPE (SYMBOL_TYPE (function));
1163 internal_error (__FILE__, __LINE__,
1164 "finish_command: function has no target type");
1166 if (TYPE_CODE (value_type) == TYPE_CODE_VOID)
1168 do_exec_cleanups (cleanups);
1172 funcaddr = BLOCK_START (SYMBOL_BLOCK_VALUE (function));
1174 struct_return = using_struct_return (value_of_variable (function, NULL),
1176 check_typedef (value_type),
1177 BLOCK_GCC_COMPILED (SYMBOL_BLOCK_VALUE (function)));
1179 print_return_value (struct_return, value_type);
1181 do_exec_cleanups (cleanups);
1184 /* "finish": Set a temporary breakpoint at the place
1185 the selected frame will return to, then continue. */
1188 finish_command (char *arg, int from_tty)
1190 struct symtab_and_line sal;
1191 register struct frame_info *frame;
1192 register struct symbol *function;
1193 struct breakpoint *breakpoint;
1194 struct cleanup *old_chain;
1195 struct continuation_arg *arg1, *arg2, *arg3;
1199 /* Find out whether we must run in the background. */
1201 async_exec = strip_bg_char (&arg);
1203 /* If we must run in the background, but the target can't do it,
1205 if (event_loop_p && async_exec && !target_can_async_p ())
1206 error ("Asynchronous execution not supported on this target.");
1208 /* If we are not asked to run in the bg, then prepare to run in the
1209 foreground, synchronously. */
1210 if (event_loop_p && !async_exec && target_can_async_p ())
1212 /* Simulate synchronous execution */
1213 async_disable_stdin ();
1217 error ("The \"finish\" command does not take any arguments.");
1218 if (!target_has_execution)
1219 error ("The program is not running.");
1220 if (selected_frame == NULL)
1221 error ("No selected frame.");
1223 frame = get_prev_frame (selected_frame);
1225 error ("\"finish\" not meaningful in the outermost frame.");
1227 clear_proceed_status ();
1229 sal = find_pc_line (frame->pc, 0);
1232 breakpoint = set_momentary_breakpoint (sal, frame, bp_finish);
1234 if (!event_loop_p || !target_can_async_p ())
1235 old_chain = make_cleanup_delete_breakpoint (breakpoint);
1237 old_chain = make_exec_cleanup_delete_breakpoint (breakpoint);
1239 /* Find the function we will return from. */
1241 function = find_pc_function (selected_frame->pc);
1243 /* Print info on the selected frame, including level number
1247 printf_filtered ("Run till exit from ");
1248 print_stack_frame (selected_frame, selected_frame_level, 0);
1251 /* If running asynchronously and the target support asynchronous
1252 execution, set things up for the rest of the finish command to be
1253 completed later on, when gdb has detected that the target has
1254 stopped, in fetch_inferior_event. */
1255 if (event_loop_p && target_can_async_p ())
1258 (struct continuation_arg *) xmalloc (sizeof (struct continuation_arg));
1260 (struct continuation_arg *) xmalloc (sizeof (struct continuation_arg));
1262 (struct continuation_arg *) xmalloc (sizeof (struct continuation_arg));
1266 arg1->data.pointer = breakpoint;
1267 arg2->data.pointer = function;
1268 arg3->data.pointer = old_chain;
1269 add_continuation (finish_command_continuation, arg1);
1272 proceed_to_finish = 1; /* We want stop_registers, please... */
1273 proceed ((CORE_ADDR) -1, TARGET_SIGNAL_DEFAULT, 0);
1275 /* Do this only if not running asynchronously or if the target
1276 cannot do async execution. Otherwise, complete this command when
1277 the target actually stops, in fetch_inferior_event. */
1278 if (!event_loop_p || !target_can_async_p ())
1281 /* Did we stop at our breakpoint? */
1282 if (bpstat_find_breakpoint (stop_bpstat, breakpoint) != NULL
1285 struct type *value_type;
1289 value_type = TYPE_TARGET_TYPE (SYMBOL_TYPE (function));
1291 internal_error (__FILE__, __LINE__,
1292 "finish_command: function has no target type");
1294 /* FIXME: Shouldn't we do the cleanups before returning? */
1295 if (TYPE_CODE (value_type) == TYPE_CODE_VOID)
1298 funcaddr = BLOCK_START (SYMBOL_BLOCK_VALUE (function));
1301 using_struct_return (value_of_variable (function, NULL),
1303 check_typedef (value_type),
1304 BLOCK_GCC_COMPILED (SYMBOL_BLOCK_VALUE (function)));
1306 print_return_value (struct_return, value_type);
1308 do_cleanups (old_chain);
1314 program_info (char *args, int from_tty)
1316 bpstat bs = stop_bpstat;
1317 int num = bpstat_num (&bs);
1319 if (!target_has_execution)
1321 printf_filtered ("The program being debugged is not being run.\n");
1325 target_files_info ();
1326 printf_filtered ("Program stopped at %s.\n",
1327 local_hex_string ((unsigned long) stop_pc));
1329 printf_filtered ("It stopped after being stepped.\n");
1332 /* There may be several breakpoints in the same place, so this
1333 isn't as strange as it seems. */
1338 printf_filtered ("It stopped at a breakpoint that has ");
1339 printf_filtered ("since been deleted.\n");
1342 printf_filtered ("It stopped at breakpoint %d.\n", num);
1343 num = bpstat_num (&bs);
1346 else if (stop_signal != TARGET_SIGNAL_0)
1348 printf_filtered ("It stopped with signal %s, %s.\n",
1349 target_signal_to_name (stop_signal),
1350 target_signal_to_string (stop_signal));
1355 printf_filtered ("Type \"info stack\" or \"info registers\" ");
1356 printf_filtered ("for more information.\n");
1361 environment_info (char *var, int from_tty)
1365 register char *val = get_in_environ (inferior_environ, var);
1368 puts_filtered (var);
1369 puts_filtered (" = ");
1370 puts_filtered (val);
1371 puts_filtered ("\n");
1375 puts_filtered ("Environment variable \"");
1376 puts_filtered (var);
1377 puts_filtered ("\" not defined.\n");
1382 register char **vector = environ_vector (inferior_environ);
1385 puts_filtered (*vector++);
1386 puts_filtered ("\n");
1392 set_environment_command (char *arg, int from_tty)
1394 register char *p, *val, *var;
1398 error_no_arg ("environment variable and value");
1400 /* Find seperation between variable name and value */
1401 p = (char *) strchr (arg, '=');
1402 val = (char *) strchr (arg, ' ');
1404 if (p != 0 && val != 0)
1406 /* We have both a space and an equals. If the space is before the
1407 equals, walk forward over the spaces til we see a nonspace
1408 (possibly the equals). */
1413 /* Now if the = is after the char following the spaces,
1414 take the char following the spaces. */
1418 else if (val != 0 && p == 0)
1422 error_no_arg ("environment variable to set");
1424 if (p == 0 || p[1] == 0)
1428 p = arg + strlen (arg); /* So that savestring below will work */
1432 /* Not setting variable value to null */
1434 while (*val == ' ' || *val == '\t')
1438 while (p != arg && (p[-1] == ' ' || p[-1] == '\t'))
1441 var = savestring (arg, p - arg);
1444 printf_filtered ("Setting environment variable ");
1445 printf_filtered ("\"%s\" to null value.\n", var);
1446 set_in_environ (inferior_environ, var, "");
1449 set_in_environ (inferior_environ, var, val);
1454 unset_environment_command (char *var, int from_tty)
1458 /* If there is no argument, delete all environment variables.
1459 Ask for confirmation if reading from the terminal. */
1460 if (!from_tty || query ("Delete all environment variables? "))
1462 free_environ (inferior_environ);
1463 inferior_environ = make_environ ();
1467 unset_in_environ (inferior_environ, var);
1470 /* Handle the execution path (PATH variable) */
1472 static const char path_var_name[] = "PATH";
1476 path_info (char *args, int from_tty)
1478 puts_filtered ("Executable and object file path: ");
1479 puts_filtered (get_in_environ (inferior_environ, path_var_name));
1480 puts_filtered ("\n");
1483 /* Add zero or more directories to the front of the execution path. */
1486 path_command (char *dirname, int from_tty)
1491 env = get_in_environ (inferior_environ, path_var_name);
1492 /* Can be null if path is not set */
1495 exec_path = xstrdup (env);
1496 mod_path (dirname, &exec_path);
1497 set_in_environ (inferior_environ, path_var_name, exec_path);
1500 path_info ((char *) NULL, from_tty);
1504 #ifdef REGISTER_NAMES
1505 char *gdb_register_names[] = REGISTER_NAMES;
1507 /* Print out the machine register regnum. If regnum is -1,
1508 print all registers (fpregs == 1) or all non-float registers
1511 For most machines, having all_registers_info() print the
1512 register(s) one per line is good enough. If a different format
1513 is required, (eg, for MIPS or Pyramid 90x, which both have
1514 lots of regs), or there is an existing convention for showing
1515 all the registers, define the macro DO_REGISTERS_INFO(regnum, fp)
1516 to provide that format. */
1519 do_registers_info (int regnum, int fpregs)
1522 int numregs = NUM_REGS + NUM_PSEUDO_REGS;
1523 char *raw_buffer = (char*) alloca (MAX_REGISTER_RAW_SIZE);
1524 char *virtual_buffer = (char*) alloca (MAX_REGISTER_VIRTUAL_SIZE);
1526 for (i = 0; i < numregs; i++)
1528 /* Decide between printing all regs, nonfloat regs, or specific reg. */
1531 if (TYPE_CODE (REGISTER_VIRTUAL_TYPE (i)) == TYPE_CODE_FLT && !fpregs)
1540 /* If the register name is empty, it is undefined for this
1541 processor, so don't display anything. */
1542 if (REGISTER_NAME (i) == NULL || *(REGISTER_NAME (i)) == '\0')
1545 fputs_filtered (REGISTER_NAME (i), gdb_stdout);
1546 print_spaces_filtered (15 - strlen (REGISTER_NAME (i)), gdb_stdout);
1548 /* Get the data in raw format. */
1549 if (read_relative_register_raw_bytes (i, raw_buffer))
1551 printf_filtered ("*value not available*\n");
1555 /* Convert raw data to virtual format if necessary. */
1556 if (REGISTER_CONVERTIBLE (i))
1558 REGISTER_CONVERT_TO_VIRTUAL (i, REGISTER_VIRTUAL_TYPE (i),
1559 raw_buffer, virtual_buffer);
1563 memcpy (virtual_buffer, raw_buffer,
1564 REGISTER_VIRTUAL_SIZE (i));
1567 /* If virtual format is floating, print it that way, and in raw hex. */
1568 if (TYPE_CODE (REGISTER_VIRTUAL_TYPE (i)) == TYPE_CODE_FLT)
1572 #ifdef INVALID_FLOAT
1573 if (INVALID_FLOAT (virtual_buffer, REGISTER_VIRTUAL_SIZE (i)))
1574 printf_filtered ("<invalid float>");
1577 val_print (REGISTER_VIRTUAL_TYPE (i), virtual_buffer, 0, 0,
1578 gdb_stdout, 0, 1, 0, Val_pretty_default);
1580 printf_filtered ("\t(raw 0x");
1581 for (j = 0; j < REGISTER_RAW_SIZE (i); j++)
1583 register int idx = TARGET_BYTE_ORDER == BIG_ENDIAN ? j
1584 : REGISTER_RAW_SIZE (i) - 1 - j;
1585 printf_filtered ("%02x", (unsigned char) raw_buffer[idx]);
1587 printf_filtered (")");
1589 /* Else print as integer in hex and in decimal. */
1592 val_print (REGISTER_VIRTUAL_TYPE (i), virtual_buffer, 0, 0,
1593 gdb_stdout, 'x', 1, 0, Val_pretty_default);
1594 printf_filtered ("\t");
1595 val_print (REGISTER_VIRTUAL_TYPE (i), virtual_buffer, 0, 0,
1596 gdb_stdout, 0, 1, 0, Val_pretty_default);
1599 /* The SPARC wants to print even-numbered float regs as doubles
1600 in addition to printing them as floats. */
1601 #ifdef PRINT_REGISTER_HOOK
1602 PRINT_REGISTER_HOOK (i);
1605 printf_filtered ("\n");
1610 registers_info (char *addr_exp, int fpregs)
1612 int regnum, numregs;
1615 if (!target_has_registers)
1616 error ("The program has no registers now.");
1617 if (selected_frame == NULL)
1618 error ("No selected frame.");
1622 DO_REGISTERS_INFO (-1, fpregs);
1628 if (addr_exp[0] == '$')
1631 while (*end != '\0' && *end != ' ' && *end != '\t')
1633 numregs = NUM_REGS + NUM_PSEUDO_REGS;
1635 regnum = target_map_name_to_register (addr_exp, end - addr_exp);
1641 if (*addr_exp >= '0' && *addr_exp <= '9')
1642 regnum = atoi (addr_exp); /* Take a number */
1643 if (regnum >= numregs) /* Bad name, or bad number */
1644 error ("%.*s: invalid register", end - addr_exp, addr_exp);
1647 DO_REGISTERS_INFO (regnum, fpregs);
1650 while (*addr_exp == ' ' || *addr_exp == '\t')
1653 while (*addr_exp != '\0');
1657 all_registers_info (char *addr_exp, int from_tty)
1659 registers_info (addr_exp, 1);
1663 nofp_registers_info (char *addr_exp, int from_tty)
1665 registers_info (addr_exp, 0);
1671 * Should save/restore the tty state since it might be that the
1672 * program to be debugged was started on this tty and it wants
1673 * the tty in some state other than what we want. If it's running
1674 * on another terminal or without a terminal, then saving and
1675 * restoring the tty state is a harmless no-op.
1676 * This only needs to be done if we are attaching to a process.
1681 takes a program started up outside of gdb and ``attaches'' to it.
1682 This stops it cold in its tracks and allows us to start debugging it.
1683 and wait for the trace-trap that results from attaching. */
1686 attach_command (char *args, int from_tty)
1689 char *full_exec_path = NULL;
1691 dont_repeat (); /* Not for the faint of heart */
1693 if (target_has_execution)
1695 if (query ("A program is being debugged already. Kill it? "))
1698 error ("Not killed.");
1701 target_attach (args, from_tty);
1703 /* Set up the "saved terminal modes" of the inferior
1704 based on what modes we are starting it with. */
1705 target_terminal_init ();
1707 /* Install inferior's terminal modes. */
1708 target_terminal_inferior ();
1710 /* Set up execution context to know that we should return from
1711 wait_for_inferior as soon as the target reports a stop. */
1712 init_wait_for_inferior ();
1713 clear_proceed_status ();
1715 /* No traps are generated when attaching to inferior under Mach 3
1717 #ifndef ATTACH_NO_WAIT
1718 stop_soon_quietly = 1;
1719 wait_for_inferior ();
1723 * If no exec file is yet known, try to determine it from the
1726 exec_file = (char *) get_exec_file (0);
1729 exec_file = target_pid_to_exec_file (PIDGET (inferior_ptid));
1732 /* It's possible we don't have a full path, but rather just a
1733 filename. Some targets, such as HP-UX, don't provide the
1736 Attempt to qualify the filename against the source path.
1737 (If that fails, we'll just fall back on the original
1738 filename. Not much more we can do...)
1740 if (!source_full_path_of (exec_file, &full_exec_path))
1741 full_exec_path = savestring (exec_file, strlen (exec_file));
1743 exec_file_attach (full_exec_path, from_tty);
1744 symbol_file_add_main (full_exec_path, from_tty);
1749 /* Add shared library symbols from the newly attached process, if any. */
1750 SOLIB_ADD ((char *) 0, from_tty, ¤t_target, auto_solib_add);
1751 re_enable_breakpoints_in_shlibs ();
1754 /* Take any necessary post-attaching actions for this platform.
1756 target_post_attach (PIDGET (inferior_ptid));
1766 * takes a program previously attached to and detaches it.
1767 * The program resumes execution and will no longer stop
1768 * on signals, etc. We better not have left any breakpoints
1769 * in the program or it'll die when it hits one. For this
1770 * to work, it may be necessary for the process to have been
1771 * previously attached. It *might* work if the program was
1772 * started via the normal ptrace (PTRACE_TRACEME).
1776 detach_command (char *args, int from_tty)
1778 dont_repeat (); /* Not for the faint of heart */
1779 target_detach (args, from_tty);
1780 #if defined(SOLIB_RESTART)
1787 /* Stop the execution of the target while running in async mode, in
1791 interrupt_target_command_wrapper (char *args, int from_tty)
1793 interrupt_target_command (args, from_tty);
1797 interrupt_target_command (char *args, int from_tty)
1799 if (event_loop_p && target_can_async_p ())
1801 dont_repeat (); /* Not for the faint of heart */
1808 float_info (char *addr_exp, int from_tty)
1813 printf_filtered ("No floating point info available for this processor.\n");
1819 unset_command (char *args, int from_tty)
1821 printf_filtered ("\"unset\" must be followed by the name of ");
1822 printf_filtered ("an unset subcommand.\n");
1823 help_list (unsetlist, "unset ", -1, gdb_stdout);
1827 _initialize_infcmd (void)
1829 struct cmd_list_element *c;
1831 c = add_com ("tty", class_run, tty_command,
1832 "Set terminal for future runs of program being debugged.");
1833 c->completer = filename_completer;
1835 c = add_set_cmd ("args", class_run, var_string_noescape,
1836 (char *) &inferior_args,
1837 "Set argument list to give program being debugged when it is started.\n\
1838 Follow this command with any number of args, to be passed to the program.",
1840 c->completer = filename_completer;
1841 c->function.sfunc = notice_args_set;
1842 c = add_show_from_set (c, &showlist);
1843 c->pre_show_hook = notice_args_read;
1846 ("environment", no_class, environment_info,
1847 "The environment to give the program, or one variable's value.\n\
1848 With an argument VAR, prints the value of environment variable VAR to\n\
1849 give the program being debugged. With no arguments, prints the entire\n\
1850 environment to be given to the program.", &showlist);
1851 c->completer = noop_completer;
1853 add_prefix_cmd ("unset", no_class, unset_command,
1854 "Complement to certain \"set\" commands",
1855 &unsetlist, "unset ", 0, &cmdlist);
1857 c = add_cmd ("environment", class_run, unset_environment_command,
1858 "Cancel environment variable VAR for the program.\n\
1859 This does not affect the program until the next \"run\" command.",
1861 c->completer = noop_completer;
1863 c = add_cmd ("environment", class_run, set_environment_command,
1864 "Set environment variable value to give the program.\n\
1865 Arguments are VAR VALUE where VAR is variable name and VALUE is value.\n\
1866 VALUES of environment variables are uninterpreted strings.\n\
1867 This does not affect the program until the next \"run\" command.",
1869 c->completer = noop_completer;
1871 c = add_com ("path", class_files, path_command,
1872 "Add directory DIR(s) to beginning of search path for object files.\n\
1873 $cwd in the path means the current working directory.\n\
1874 This path is equivalent to the $PATH shell variable. It is a list of\n\
1875 directories, separated by colons. These directories are searched to find\n\
1876 fully linked executable files and separately compiled object files as needed.");
1877 c->completer = filename_completer;
1879 c = add_cmd ("paths", no_class, path_info,
1880 "Current search path for finding object files.\n\
1881 $cwd in the path means the current working directory.\n\
1882 This path is equivalent to the $PATH shell variable. It is a list of\n\
1883 directories, separated by colons. These directories are searched to find\n\
1884 fully linked executable files and separately compiled object files as needed.",
1886 c->completer = noop_completer;
1888 add_com ("attach", class_run, attach_command,
1889 "Attach to a process or file outside of GDB.\n\
1890 This command attaches to another target, of the same type as your last\n\
1891 \"target\" command (\"info files\" will show your target stack).\n\
1892 The command may take as argument a process id or a device file.\n\
1893 For a process id, you must have permission to send the process a signal,\n\
1894 and it must have the same effective uid as the debugger.\n\
1895 When using \"attach\" with a process id, the debugger finds the\n\
1896 program running in the process, looking first in the current working\n\
1897 directory, or (if not found there) using the source file search path\n\
1898 (see the \"directory\" command). You can also use the \"file\" command\n\
1899 to specify the program, and to load its symbol table.");
1901 add_com ("detach", class_run, detach_command,
1902 "Detach a process or file previously attached.\n\
1903 If a process, it is no longer traced, and it continues its execution. If\n\
1904 you were debugging a file, the file is closed and gdb no longer accesses it.");
1906 add_com ("signal", class_run, signal_command,
1907 "Continue program giving it signal specified by the argument.\n\
1908 An argument of \"0\" means continue program without giving it a signal.");
1910 add_com ("stepi", class_run, stepi_command,
1911 "Step one instruction exactly.\n\
1912 Argument N means do this N times (or till program stops for another reason).");
1913 add_com_alias ("si", "stepi", class_alias, 0);
1915 add_com ("nexti", class_run, nexti_command,
1916 "Step one instruction, but proceed through subroutine calls.\n\
1917 Argument N means do this N times (or till program stops for another reason).");
1918 add_com_alias ("ni", "nexti", class_alias, 0);
1920 add_com ("finish", class_run, finish_command,
1921 "Execute until selected stack frame returns.\n\
1922 Upon return, the value returned is printed and put in the value history.");
1924 add_com ("next", class_run, next_command,
1925 "Step program, proceeding through subroutine calls.\n\
1926 Like the \"step\" command as long as subroutine calls do not happen;\n\
1927 when they do, the call is treated as one instruction.\n\
1928 Argument N means do this N times (or till program stops for another reason).");
1929 add_com_alias ("n", "next", class_run, 1);
1931 add_com_alias ("S", "next", class_run, 1);
1933 add_com ("step", class_run, step_command,
1934 "Step program until it reaches a different source line.\n\
1935 Argument N means do this N times (or till program stops for another reason).");
1936 add_com_alias ("s", "step", class_run, 1);
1938 c = add_com ("until", class_run, until_command,
1939 "Execute until the program reaches a source line greater than the current\n\
1940 or a specified line or address or function (same args as break command).\n\
1941 Execution will also stop upon exit from the current stack frame.");
1942 c->completer = location_completer;
1943 add_com_alias ("u", "until", class_run, 1);
1945 c = add_com ("jump", class_run, jump_command,
1946 "Continue program being debugged at specified line or address.\n\
1947 Give as argument either LINENUM or *ADDR, where ADDR is an expression\n\
1948 for an address to start at.");
1949 c->completer = location_completer;
1953 c = add_com ("go", class_run, go_command,
1954 "Usage: go <location>\n\
1955 Continue program being debugged, stopping at specified line or \n\
1957 Give as argument either LINENUM or *ADDR, where ADDR is an \n\
1958 expression for an address to start at.\n\
1959 This command is a combination of tbreak and jump.");
1960 c->completer = location_completer;
1964 add_com_alias ("g", "go", class_run, 1);
1966 add_com ("continue", class_run, continue_command,
1967 "Continue program being debugged, after signal or breakpoint.\n\
1968 If proceeding from breakpoint, a number N may be used as an argument,\n\
1969 which means to set the ignore count of that breakpoint to N - 1 (so that\n\
1970 the breakpoint won't break until the Nth time it is reached).");
1971 add_com_alias ("c", "cont", class_run, 1);
1972 add_com_alias ("fg", "cont", class_run, 1);
1974 c = add_com ("run", class_run, run_command,
1975 "Start debugged program. You may specify arguments to give it.\n\
1976 Args may include \"*\", or \"[...]\"; they are expanded using \"sh\".\n\
1977 Input and output redirection with \">\", \"<\", or \">>\" are also allowed.\n\n\
1978 With no arguments, uses arguments last specified (with \"run\" or \"set args\").\n\
1979 To cancel previous arguments and run with no arguments,\n\
1980 use \"set args\" without arguments.");
1981 c->completer = filename_completer;
1982 add_com_alias ("r", "run", class_run, 1);
1984 add_com ("R", class_run, run_no_args_command,
1985 "Start debugged program with no arguments.");
1987 add_com ("interrupt", class_run, interrupt_target_command,
1988 "Interrupt the execution of the debugged program.");
1990 add_info ("registers", nofp_registers_info,
1991 "List of integer registers and their contents, for selected stack frame.\n\
1992 Register name as argument means describe only that register.");
1993 add_info_alias ("r", "registers", 1);
1996 add_com ("lr", class_info, nofp_registers_info,
1997 "List of integer registers and their contents, for selected stack frame.\n\
1998 Register name as argument means describe only that register.");
1999 add_info ("all-registers", all_registers_info,
2000 "List of all registers and their contents, for selected stack frame.\n\
2001 Register name as argument means describe only that register.");
2003 add_info ("program", program_info,
2004 "Execution status of the program.");
2006 add_info ("float", float_info,
2007 "Print the status of the floating point unit\n");
2009 inferior_environ = make_environ ();
2010 init_environ (inferior_environ);