1 /* Memory-access and commands for "inferior" process, for GDB.
2 Copyright 1986, 87, 88, 89, 91, 92, 95, 96, 1998, 1999
3 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
24 #include "gdb_string.h"
40 #include "event-top.h"
41 #include "parser-defs.h"
43 /* Functions exported for general use: */
45 void nofp_registers_info (char *, int);
47 void all_registers_info (char *, int);
49 void registers_info (char *, int);
51 /* Local functions: */
53 void continue_command (char *, int);
55 static void print_return_value (int struct_return, struct type *value_type);
57 static void finish_command_continuation (struct continuation_arg *);
59 static void until_next_command (int);
61 static void until_command (char *, int);
63 static void path_info (char *, int);
65 static void path_command (char *, int);
67 static void unset_command (char *, int);
69 static void float_info (char *, int);
71 static void detach_command (char *, int);
73 static void interrupt_target_command (char *args, int from_tty);
75 static void unset_environment_command (char *, int);
77 static void set_environment_command (char *, int);
79 static void environment_info (char *, int);
81 static void program_info (char *, int);
83 static void finish_command (char *, int);
85 static void signal_command (char *, int);
87 static void jump_command (char *, int);
89 static void step_1 (int, int, char *);
90 static void step_once (int skip_subroutines, int single_inst, int count);
91 static void step_1_continuation (struct continuation_arg *arg);
93 void nexti_command (char *, int);
95 void stepi_command (char *, int);
97 static void next_command (char *, int);
99 static void step_command (char *, int);
101 static void run_command (char *, int);
103 static void run_no_args_command (char *args, int from_tty);
105 static void go_command (char *line_no, int from_tty);
107 static int strip_bg_char (char **);
109 void _initialize_infcmd (void);
111 #define GO_USAGE "Usage: go <location>\n"
113 static void breakpoint_auto_delete_contents (PTR);
115 #define ERROR_NO_INFERIOR \
116 if (!target_has_execution) error ("The program is not being run.");
118 /* String containing arguments to give to the program, separated by spaces.
119 Empty string (pointer to '\0') means no args. */
121 static char *inferior_args;
123 /* File name for default use for standard in/out in the inferior. */
125 char *inferior_io_terminal;
127 /* Pid of our debugged inferior, or 0 if no inferior now.
128 Since various parts of infrun.c test this to see whether there is a program
129 being debugged it should be nonzero (currently 3 is used) for remote
134 /* Last signal that the inferior received (why it stopped). */
136 enum target_signal stop_signal;
138 /* Address at which inferior stopped. */
142 /* Chain containing status of breakpoint(s) that we have stopped at. */
146 /* Flag indicating that a command has proceeded the inferior past the
147 current breakpoint. */
149 int breakpoint_proceeded;
151 /* Nonzero if stopped due to a step command. */
155 /* Nonzero if stopped due to completion of a stack dummy routine. */
157 int stop_stack_dummy;
159 /* Nonzero if stopped due to a random (unexpected) signal in inferior
162 int stopped_by_random_signal;
164 /* Range to single step within.
165 If this is nonzero, respond to a single-step signal
166 by continuing to step if the pc is in this range. */
168 CORE_ADDR step_range_start; /* Inclusive */
169 CORE_ADDR step_range_end; /* Exclusive */
171 /* Stack frame address as of when stepping command was issued.
172 This is how we know when we step into a subroutine call,
173 and how to set the frame for the breakpoint used to step out. */
175 CORE_ADDR step_frame_address;
177 /* Our notion of the current stack pointer. */
181 enum step_over_calls_kind step_over_calls;
183 /* If stepping, nonzero means step count is > 1
184 so don't print frame next time inferior stops
185 if it stops due to stepping. */
189 /* Environment to use for running inferior,
190 in format described in environ.h. */
192 struct environ *inferior_environ;
194 /* Accessor routines. */
197 get_inferior_args (void)
199 return inferior_args;
203 set_inferior_args (char *newargs)
205 char *saved_args = inferior_args;
207 inferior_args = newargs;
212 /* This function detects whether or not a '&' character (indicating
213 background execution) has been added as *the last* of the arguments ARGS
214 of a command. If it has, it removes it and returns 1. Otherwise it
215 does nothing and returns 0. */
217 strip_bg_char (char **args)
221 p = strchr (*args, '&');
225 if (p == (*args + strlen (*args) - 1))
227 if (strlen (*args) > 1)
231 while (*p == ' ' || *p == '\t');
244 tty_command (char *file, int from_tty)
247 error_no_arg ("terminal name for running target process");
249 inferior_io_terminal = savestring (file, strlen (file));
253 run_command (char *args, int from_tty)
259 if (inferior_pid != 0 && target_has_execution)
262 && !query ("The program being debugged has been started already.\n\
263 Start it from the beginning? "))
264 error ("Program not restarted.");
266 #if defined(SOLIB_RESTART)
269 init_wait_for_inferior ();
272 clear_breakpoint_hit_counts ();
274 exec_file = (char *) get_exec_file (0);
276 /* Purge old solib objfiles. */
277 objfile_purge_solibs ();
279 do_run_cleanups (NULL);
281 /* The exec file is re-read every time we do a generic_mourn_inferior, so
282 we just have to worry about the symbol file. */
285 /* We keep symbols from add-symbol-file, on the grounds that the
286 user might want to add some symbols before running the program
287 (right?). But sometimes (dynamic loading where the user manually
288 introduces the new symbols with add-symbol-file), the code which
289 the symbols describe does not persist between runs. Currently
290 the user has to manually nuke all symbols between runs if they
291 want them to go away (PR 2207). This is probably reasonable. */
295 if (event_loop_p && target_can_async_p ())
296 async_disable_stdin ();
300 int async_exec = strip_bg_char (&args);
302 /* If we get a request for running in the bg but the target
303 doesn't support it, error out. */
304 if (event_loop_p && async_exec && !target_can_async_p ())
305 error ("Asynchronous execution not supported on this target.");
307 /* If we don't get a request of running in the bg, then we need
308 to simulate synchronous (fg) execution. */
309 if (event_loop_p && !async_exec && target_can_async_p ())
311 /* Simulate synchronous execution */
312 async_disable_stdin ();
315 /* If there were other args, beside '&', process them. */
318 char *old_args = set_inferior_args (xstrdup (args));
326 ui_out_field_string (uiout, NULL, "Starting program");
327 ui_out_text (uiout, ": ");
329 ui_out_field_string (uiout, "execfile", exec_file);
330 ui_out_spaces (uiout, 1);
331 ui_out_field_string (uiout, "infargs", inferior_args);
332 ui_out_text (uiout, "\n");
333 ui_out_flush (uiout);
335 puts_filtered ("Starting program: ");
337 puts_filtered (exec_file);
339 puts_filtered (inferior_args);
340 puts_filtered ("\n");
341 gdb_flush (gdb_stdout);
345 target_create_inferior (exec_file, inferior_args,
346 environ_vector (inferior_environ));
351 run_no_args_command (char *args, int from_tty)
353 char *old_args = set_inferior_args (xstrdup (""));
359 continue_command (char *proc_count_exp, int from_tty)
364 /* Find out whether we must run in the background. */
365 if (proc_count_exp != NULL)
366 async_exec = strip_bg_char (&proc_count_exp);
368 /* If we must run in the background, but the target can't do it,
370 if (event_loop_p && async_exec && !target_can_async_p ())
371 error ("Asynchronous execution not supported on this target.");
373 /* If we are not asked to run in the bg, then prepare to run in the
374 foreground, synchronously. */
375 if (event_loop_p && !async_exec && target_can_async_p ())
377 /* Simulate synchronous execution */
378 async_disable_stdin ();
381 /* If have argument (besides '&'), set proceed count of breakpoint
383 if (proc_count_exp != NULL)
385 bpstat bs = stop_bpstat;
386 int num = bpstat_num (&bs);
387 if (num == 0 && from_tty)
390 ("Not stopped at any breakpoint; argument ignored.\n");
394 set_ignore_count (num,
395 parse_and_eval_long (proc_count_exp) - 1,
397 /* set_ignore_count prints a message ending with a period.
398 So print two spaces before "Continuing.". */
400 printf_filtered (" ");
401 num = bpstat_num (&bs);
406 printf_filtered ("Continuing.\n");
408 clear_proceed_status ();
410 proceed ((CORE_ADDR) -1, TARGET_SIGNAL_DEFAULT, 0);
413 /* Step until outside of current statement. */
417 step_command (char *count_string, int from_tty)
419 step_1 (0, 0, count_string);
422 /* Likewise, but skip over subroutine calls as if single instructions. */
426 next_command (char *count_string, int from_tty)
428 step_1 (1, 0, count_string);
431 /* Likewise, but step only one instruction. */
435 stepi_command (char *count_string, int from_tty)
437 step_1 (0, 1, count_string);
442 nexti_command (char *count_string, int from_tty)
444 step_1 (1, 1, count_string);
448 disable_longjmp_breakpoint_cleanup (void *ignore)
450 disable_longjmp_breakpoint ();
454 step_1 (int skip_subroutines, int single_inst, char *count_string)
456 register int count = 1;
457 struct frame_info *frame;
458 struct cleanup *cleanups = 0;
464 async_exec = strip_bg_char (&count_string);
466 /* If we get a request for running in the bg but the target
467 doesn't support it, error out. */
468 if (event_loop_p && async_exec && !target_can_async_p ())
469 error ("Asynchronous execution not supported on this target.");
471 /* If we don't get a request of running in the bg, then we need
472 to simulate synchronous (fg) execution. */
473 if (event_loop_p && !async_exec && target_can_async_p ())
475 /* Simulate synchronous execution */
476 async_disable_stdin ();
479 count = count_string ? parse_and_eval_long (count_string) : 1;
481 if (!single_inst || skip_subroutines) /* leave si command alone */
483 enable_longjmp_breakpoint ();
484 if (!event_loop_p || !target_can_async_p ())
485 cleanups = make_cleanup (disable_longjmp_breakpoint_cleanup, 0 /*ignore*/);
487 make_exec_cleanup (disable_longjmp_breakpoint_cleanup, 0 /*ignore*/);
490 /* In synchronous case, all is well, just use the regular for loop. */
491 if (!event_loop_p || !target_can_async_p ())
493 for (; count > 0; count--)
495 clear_proceed_status ();
497 frame = get_current_frame ();
498 if (!frame) /* Avoid coredump here. Why tho? */
499 error ("No current frame");
500 step_frame_address = FRAME_FP (frame);
501 step_sp = read_sp ();
505 find_pc_line_pc_range (stop_pc, &step_range_start, &step_range_end);
506 if (step_range_end == 0)
509 if (find_pc_partial_function (stop_pc, &name, &step_range_start,
510 &step_range_end) == 0)
511 error ("Cannot find bounds of current function");
513 target_terminal_ours ();
515 Single stepping until exit from function %s, \n\
516 which has no line number information.\n", name);
521 /* Say we are stepping, but stop after one insn whatever it does. */
522 step_range_start = step_range_end = 1;
523 if (!skip_subroutines)
525 Don't step over function calls, not even to functions lacking
527 step_over_calls = STEP_OVER_NONE;
530 if (skip_subroutines)
531 step_over_calls = STEP_OVER_ALL;
533 step_multi = (count > 1);
534 proceed ((CORE_ADDR) -1, TARGET_SIGNAL_DEFAULT, 1);
539 /* FIXME: On nexti, this may have already been done (when we hit the
540 step resume break, I think). Probably this should be moved to
541 wait_for_inferior (near the top). */
542 #if defined (SHIFT_INST_REGS)
547 if (!single_inst || skip_subroutines)
548 do_cleanups (cleanups);
551 /* In case of asynchronous target things get complicated, do only
552 one step for now, before returning control to the event loop. Let
553 the continuation figure out how many other steps we need to do,
554 and handle them one at the time, through step_once(). */
557 if (event_loop_p && target_can_async_p ())
558 step_once (skip_subroutines, single_inst, count);
562 /* Called after we are done with one step operation, to check whether
563 we need to step again, before we print the prompt and return control
564 to the user. If count is > 1, we will need to do one more call to
565 proceed(), via step_once(). Basically it is like step_once and
566 step_1_continuation are co-recursive. */
568 step_1_continuation (struct continuation_arg *arg)
571 int skip_subroutines;
574 skip_subroutines = arg->data.integer;
575 single_inst = arg->next->data.integer;
576 count = arg->next->next->data.integer;
580 /* FIXME: On nexti, this may have already been done (when we hit the
581 step resume break, I think). Probably this should be moved to
582 wait_for_inferior (near the top). */
583 #if defined (SHIFT_INST_REGS)
586 step_once (skip_subroutines, single_inst, count - 1);
589 if (!single_inst || skip_subroutines)
590 do_exec_cleanups (ALL_CLEANUPS);
593 /* Do just one step operation. If count >1 we will have to set up a
594 continuation to be done after the target stops (after this one
595 step). This is useful to implement the 'step n' kind of commands, in
596 case of asynchronous targets. We had to split step_1 into two parts,
597 one to be done before proceed() and one afterwards. This function is
598 called in case of step n with n>1, after the first step operation has
601 step_once (int skip_subroutines, int single_inst, int count)
603 struct continuation_arg *arg1;
604 struct continuation_arg *arg2;
605 struct continuation_arg *arg3;
606 struct frame_info *frame;
610 clear_proceed_status ();
612 frame = get_current_frame ();
613 if (!frame) /* Avoid coredump here. Why tho? */
614 error ("No current frame");
615 step_frame_address = FRAME_FP (frame);
616 step_sp = read_sp ();
620 find_pc_line_pc_range (stop_pc, &step_range_start, &step_range_end);
622 /* If we have no line info, switch to stepi mode. */
623 if (step_range_end == 0 && step_stop_if_no_debug)
625 step_range_start = step_range_end = 1;
627 else if (step_range_end == 0)
630 if (find_pc_partial_function (stop_pc, &name, &step_range_start,
631 &step_range_end) == 0)
632 error ("Cannot find bounds of current function");
634 target_terminal_ours ();
636 Single stepping until exit from function %s, \n\
637 which has no line number information.\n", name);
642 /* Say we are stepping, but stop after one insn whatever it does. */
643 step_range_start = step_range_end = 1;
644 if (!skip_subroutines)
646 Don't step over function calls, not even to functions lacking
648 step_over_calls = STEP_OVER_NONE;
651 if (skip_subroutines)
652 step_over_calls = STEP_OVER_ALL;
654 step_multi = (count > 1);
656 (struct continuation_arg *) xmalloc (sizeof (struct continuation_arg));
658 (struct continuation_arg *) xmalloc (sizeof (struct continuation_arg));
660 (struct continuation_arg *) xmalloc (sizeof (struct continuation_arg));
662 arg1->data.integer = skip_subroutines;
664 arg2->data.integer = single_inst;
666 arg3->data.integer = count;
667 add_intermediate_continuation (step_1_continuation, arg1);
668 proceed ((CORE_ADDR) -1, TARGET_SIGNAL_DEFAULT, 1);
673 /* Continue program at specified address. */
676 jump_command (char *arg, int from_tty)
678 register CORE_ADDR addr;
679 struct symtabs_and_lines sals;
680 struct symtab_and_line sal;
687 /* Find out whether we must run in the background. */
689 async_exec = strip_bg_char (&arg);
691 /* If we must run in the background, but the target can't do it,
693 if (event_loop_p && async_exec && !target_can_async_p ())
694 error ("Asynchronous execution not supported on this target.");
696 /* If we are not asked to run in the bg, then prepare to run in the
697 foreground, synchronously. */
698 if (event_loop_p && !async_exec && target_can_async_p ())
700 /* Simulate synchronous execution */
701 async_disable_stdin ();
705 error_no_arg ("starting address");
707 sals = decode_line_spec_1 (arg, 1);
710 error ("Unreasonable jump request");
716 if (sal.symtab == 0 && sal.pc == 0)
717 error ("No source file has been specified.");
719 resolve_sal_pc (&sal); /* May error out */
721 /* See if we are trying to jump to another function. */
722 fn = get_frame_function (get_current_frame ());
723 sfn = find_pc_function (sal.pc);
724 if (fn != NULL && sfn != fn)
726 if (!query ("Line %d is not in `%s'. Jump anyway? ", sal.line,
727 SYMBOL_SOURCE_NAME (fn)))
729 error ("Not confirmed.");
736 fixup_symbol_section (sfn, 0);
737 if (section_is_overlay (SYMBOL_BFD_SECTION (sfn)) &&
738 !section_is_mapped (SYMBOL_BFD_SECTION (sfn)))
740 if (!query ("WARNING!!! Destination is in unmapped overlay! Jump anyway? "))
742 error ("Not confirmed.");
752 printf_filtered ("Continuing at ");
753 print_address_numeric (addr, 1, gdb_stdout);
754 printf_filtered (".\n");
757 clear_proceed_status ();
758 proceed (addr, TARGET_SIGNAL_0, 0);
762 /* Go to line or address in current procedure */
764 go_command (char *line_no, int from_tty)
766 if (line_no == (char *) NULL || !*line_no)
767 printf_filtered (GO_USAGE);
770 tbreak_command (line_no, from_tty);
771 jump_command (line_no, from_tty);
776 /* Continue program giving it specified signal. */
779 signal_command (char *signum_exp, int from_tty)
781 enum target_signal oursig;
783 dont_repeat (); /* Too dangerous. */
787 error_no_arg ("signal number");
789 /* It would be even slicker to make signal names be valid expressions,
790 (the type could be "enum $signal" or some such), then the user could
791 assign them to convenience variables. */
792 oursig = target_signal_from_name (signum_exp);
794 if (oursig == TARGET_SIGNAL_UNKNOWN)
796 /* No, try numeric. */
797 int num = parse_and_eval_long (signum_exp);
800 oursig = TARGET_SIGNAL_0;
802 oursig = target_signal_from_command (num);
807 if (oursig == TARGET_SIGNAL_0)
808 printf_filtered ("Continuing with no signal.\n");
810 printf_filtered ("Continuing with signal %s.\n",
811 target_signal_to_name (oursig));
814 clear_proceed_status ();
815 /* "signal 0" should not get stuck if we are stopped at a breakpoint.
816 FIXME: Neither should "signal foo" but when I tried passing
817 (CORE_ADDR)-1 unconditionally I got a testsuite failure which I haven't
818 tried to track down yet. */
819 proceed (oursig == TARGET_SIGNAL_0 ? (CORE_ADDR) -1 : stop_pc, oursig, 0);
822 /* Call breakpoint_auto_delete on the current contents of the bpstat
823 pointed to by arg (which is really a bpstat *). */
826 breakpoint_auto_delete_contents (PTR arg)
828 breakpoint_auto_delete (*(bpstat *) arg);
832 /* Execute a "stack dummy", a piece of code stored in the stack
833 by the debugger to be executed in the inferior.
835 To call: first, do PUSH_DUMMY_FRAME.
836 Then push the contents of the dummy. It should end with a breakpoint insn.
837 Then call here, passing address at which to start the dummy.
839 The contents of all registers are saved before the dummy frame is popped
840 and copied into the buffer BUFFER.
842 The dummy's frame is automatically popped whenever that break is hit.
843 If that is the first time the program stops, run_stack_dummy
844 returns to its caller with that frame already gone and returns 0.
846 Otherwise, run_stack-dummy returns a non-zero value.
847 If the called function receives a random signal, we do not allow the user
848 to continue executing it as this may not work. The dummy frame is poped
850 If we hit a breakpoint, we leave the frame in place and return 2 (the frame
851 will eventually be popped when we do hit the dummy end breakpoint). */
854 run_stack_dummy (CORE_ADDR addr, char *buffer)
856 struct cleanup *old_cleanups = make_cleanup (null_cleanup, 0);
859 /* Now proceed, having reached the desired place. */
860 clear_proceed_status ();
862 if (CALL_DUMMY_BREAKPOINT_OFFSET_P)
864 struct breakpoint *bpt;
865 struct symtab_and_line sal;
867 INIT_SAL (&sal); /* initialize to zeroes */
868 if (CALL_DUMMY_LOCATION == AT_ENTRY_POINT)
870 sal.pc = CALL_DUMMY_ADDRESS ();
874 sal.pc = addr - CALL_DUMMY_START_OFFSET + CALL_DUMMY_BREAKPOINT_OFFSET;
876 sal.section = find_pc_overlay (sal.pc);
878 /* Set up a FRAME for the dummy frame so we can pass it to
879 set_momentary_breakpoint. We need to give the breakpoint a
880 frame in case there is only one copy of the dummy (e.g.
881 CALL_DUMMY_LOCATION == AFTER_TEXT_END). */
882 flush_cached_frames ();
883 set_current_frame (create_new_frame (read_fp (), sal.pc));
885 /* If defined, CALL_DUMMY_BREAKPOINT_OFFSET is where we need to put
886 a breakpoint instruction. If not, the call dummy already has the
887 breakpoint instruction in it.
889 addr is the address of the call dummy plus the CALL_DUMMY_START_OFFSET,
890 so we need to subtract the CALL_DUMMY_START_OFFSET. */
891 bpt = set_momentary_breakpoint (sal,
892 get_current_frame (),
894 bpt->disposition = del;
896 /* If all error()s out of proceed ended up calling normal_stop (and
897 perhaps they should; it already does in the special case of error
898 out of resume()), then we wouldn't need this. */
899 make_cleanup (breakpoint_auto_delete_contents, &stop_bpstat);
902 disable_watchpoints_before_interactive_call_start ();
903 proceed_to_finish = 1; /* We want stop_registers, please... */
905 if (target_can_async_p ())
906 saved_async = target_async_mask (0);
908 proceed (addr, TARGET_SIGNAL_0, 0);
911 target_async_mask (saved_async);
913 enable_watchpoints_after_interactive_call_stop ();
915 discard_cleanups (old_cleanups);
917 /* We can stop during an inferior call because a signal is received. */
918 if (stopped_by_random_signal)
921 /* We may also stop prematurely because we hit a breakpoint in the
923 if (!stop_stack_dummy)
926 /* On normal return, the stack dummy has been popped already. */
928 memcpy (buffer, stop_registers, REGISTER_BYTES);
932 /* Proceed until we reach a different source line with pc greater than
933 our current one or exit the function. We skip calls in both cases.
935 Note that eventually this command should probably be changed so
936 that only source lines are printed out when we hit the breakpoint
937 we set. This may involve changes to wait_for_inferior and the
938 proceed status code. */
942 until_next_command (int from_tty)
944 struct frame_info *frame;
947 struct symtab_and_line sal;
949 clear_proceed_status ();
951 frame = get_current_frame ();
953 /* Step until either exited from this function or greater
954 than the current line (if in symbolic section) or pc (if
958 func = find_pc_function (pc);
962 struct minimal_symbol *msymbol = lookup_minimal_symbol_by_pc (pc);
965 error ("Execution is not within a known function.");
967 step_range_start = SYMBOL_VALUE_ADDRESS (msymbol);
972 sal = find_pc_line (pc, 0);
974 step_range_start = BLOCK_START (SYMBOL_BLOCK_VALUE (func));
975 step_range_end = sal.end;
978 step_over_calls = STEP_OVER_ALL;
979 step_frame_address = FRAME_FP (frame);
980 step_sp = read_sp ();
982 step_multi = 0; /* Only one call to proceed */
984 proceed ((CORE_ADDR) -1, TARGET_SIGNAL_DEFAULT, 1);
988 until_command (char *arg, int from_tty)
992 if (!target_has_execution)
993 error ("The program is not running.");
995 /* Find out whether we must run in the background. */
997 async_exec = strip_bg_char (&arg);
999 /* If we must run in the background, but the target can't do it,
1001 if (event_loop_p && async_exec && !target_can_async_p ())
1002 error ("Asynchronous execution not supported on this target.");
1004 /* If we are not asked to run in the bg, then prepare to run in the
1005 foreground, synchronously. */
1006 if (event_loop_p && !async_exec && target_can_async_p ())
1008 /* Simulate synchronous execution */
1009 async_disable_stdin ();
1013 until_break_command (arg, from_tty);
1015 until_next_command (from_tty);
1019 /* Print the result of a function at the end of a 'finish' command. */
1021 print_return_value (int structure_return, struct type *value_type)
1023 register value_ptr value;
1025 static struct ui_stream *stb = NULL;
1028 if (!structure_return)
1030 value = value_being_returned (value_type, stop_registers, structure_return);
1032 stb = ui_out_stream_new (uiout);
1033 ui_out_text (uiout, "Value returned is ");
1034 ui_out_field_fmt (uiout, "gdb-result-var", "$%d", record_latest_value (value));
1035 ui_out_text (uiout, " = ");
1036 value_print (value, stb->stream, 0, Val_no_prettyprint);
1037 ui_out_field_stream (uiout, "return-value", stb);
1038 ui_out_text (uiout, "\n");
1040 printf_filtered ("Value returned is $%d = ", record_latest_value (value));
1041 value_print (value, gdb_stdout, 0, Val_no_prettyprint);
1042 printf_filtered ("\n");
1047 /* We cannot determine the contents of the structure because
1048 it is on the stack, and we don't know where, since we did not
1049 initiate the call, as opposed to the call_function_by_hand case */
1050 #ifdef VALUE_RETURNED_FROM_STACK
1053 ui_out_text (uiout, "Value returned has type: ");
1054 ui_out_field_string (uiout, "return-type", TYPE_NAME (value_type));
1055 ui_out_text (uiout, ".");
1056 ui_out_text (uiout, " Cannot determine contents\n");
1058 printf_filtered ("Value returned has type: %s.", TYPE_NAME (value_type));
1059 printf_filtered (" Cannot determine contents\n");
1062 value = value_being_returned (value_type, stop_registers, structure_return);
1064 stb = ui_out_stream_new (uiout);
1065 ui_out_text (uiout, "Value returned is ");
1066 ui_out_field_fmt (uiout, "gdb-result-var", "$%d", record_latest_value (value));
1067 ui_out_text (uiout, " = ");
1068 value_print (value, stb->stream, 0, Val_no_prettyprint);
1069 ui_out_field_stream (uiout, "return-value", stb);
1070 ui_out_text (uiout, "\n");
1072 printf_filtered ("Value returned is $%d = ", record_latest_value (value));
1073 value_print (value, gdb_stdout, 0, Val_no_prettyprint);
1074 printf_filtered ("\n");
1080 /* Stuff that needs to be done by the finish command after the target
1081 has stopped. In asynchronous mode, we wait for the target to stop in
1082 the call to poll or select in the event loop, so it is impossible to
1083 do all the stuff as part of the finish_command function itself. The
1084 only chance we have to complete this command is in
1085 fetch_inferior_event, which is called by the event loop as soon as it
1086 detects that the target has stopped. This function is called via the
1087 cmd_continuation pointer. */
1089 finish_command_continuation (struct continuation_arg *arg)
1091 register struct symbol *function;
1092 struct breakpoint *breakpoint;
1093 struct cleanup *cleanups;
1095 breakpoint = (struct breakpoint *) arg->data.pointer;
1096 function = (struct symbol *) arg->next->data.pointer;
1097 cleanups = (struct cleanup *) arg->next->next->data.pointer;
1099 if (bpstat_find_breakpoint (stop_bpstat, breakpoint) != NULL
1102 struct type *value_type;
1106 value_type = TYPE_TARGET_TYPE (SYMBOL_TYPE (function));
1108 internal_error ("finish_command: function has no target type");
1110 if (TYPE_CODE (value_type) == TYPE_CODE_VOID)
1112 do_exec_cleanups (cleanups);
1116 funcaddr = BLOCK_START (SYMBOL_BLOCK_VALUE (function));
1118 struct_return = using_struct_return (value_of_variable (function, NULL),
1120 check_typedef (value_type),
1121 BLOCK_GCC_COMPILED (SYMBOL_BLOCK_VALUE (function)));
1123 print_return_value (struct_return, value_type);
1125 do_exec_cleanups (cleanups);
1128 /* "finish": Set a temporary breakpoint at the place
1129 the selected frame will return to, then continue. */
1132 finish_command (char *arg, int from_tty)
1134 struct symtab_and_line sal;
1135 register struct frame_info *frame;
1136 register struct symbol *function;
1137 struct breakpoint *breakpoint;
1138 struct cleanup *old_chain;
1139 struct continuation_arg *arg1, *arg2, *arg3;
1143 /* Find out whether we must run in the background. */
1145 async_exec = strip_bg_char (&arg);
1147 /* If we must run in the background, but the target can't do it,
1149 if (event_loop_p && async_exec && !target_can_async_p ())
1150 error ("Asynchronous execution not supported on this target.");
1152 /* If we are not asked to run in the bg, then prepare to run in the
1153 foreground, synchronously. */
1154 if (event_loop_p && !async_exec && target_can_async_p ())
1156 /* Simulate synchronous execution */
1157 async_disable_stdin ();
1161 error ("The \"finish\" command does not take any arguments.");
1162 if (!target_has_execution)
1163 error ("The program is not running.");
1164 if (selected_frame == NULL)
1165 error ("No selected frame.");
1167 frame = get_prev_frame (selected_frame);
1169 error ("\"finish\" not meaningful in the outermost frame.");
1171 clear_proceed_status ();
1173 sal = find_pc_line (frame->pc, 0);
1176 breakpoint = set_momentary_breakpoint (sal, frame, bp_finish);
1178 if (!event_loop_p || !target_can_async_p ())
1179 old_chain = make_cleanup_delete_breakpoint (breakpoint);
1181 old_chain = make_exec_cleanup_delete_breakpoint (breakpoint);
1183 /* Find the function we will return from. */
1185 function = find_pc_function (selected_frame->pc);
1187 /* Print info on the selected frame, including level number
1191 printf_filtered ("Run till exit from ");
1192 print_stack_frame (selected_frame, selected_frame_level, 0);
1195 /* If running asynchronously and the target support asynchronous
1196 execution, set things up for the rest of the finish command to be
1197 completed later on, when gdb has detected that the target has
1198 stopped, in fetch_inferior_event. */
1199 if (event_loop_p && target_can_async_p ())
1202 (struct continuation_arg *) xmalloc (sizeof (struct continuation_arg));
1204 (struct continuation_arg *) xmalloc (sizeof (struct continuation_arg));
1206 (struct continuation_arg *) xmalloc (sizeof (struct continuation_arg));
1210 arg1->data.pointer = breakpoint;
1211 arg2->data.pointer = function;
1212 arg3->data.pointer = old_chain;
1213 add_continuation (finish_command_continuation, arg1);
1216 proceed_to_finish = 1; /* We want stop_registers, please... */
1217 proceed ((CORE_ADDR) -1, TARGET_SIGNAL_DEFAULT, 0);
1219 /* Do this only if not running asynchronously or if the target
1220 cannot do async execution. Otherwise, complete this command when
1221 the target actually stops, in fetch_inferior_event. */
1222 if (!event_loop_p || !target_can_async_p ())
1225 /* Did we stop at our breakpoint? */
1226 if (bpstat_find_breakpoint (stop_bpstat, breakpoint) != NULL
1229 struct type *value_type;
1233 value_type = TYPE_TARGET_TYPE (SYMBOL_TYPE (function));
1235 internal_error ("finish_command: function has no target type");
1237 /* FIXME: Shouldn't we do the cleanups before returning? */
1238 if (TYPE_CODE (value_type) == TYPE_CODE_VOID)
1241 funcaddr = BLOCK_START (SYMBOL_BLOCK_VALUE (function));
1244 using_struct_return (value_of_variable (function, NULL),
1246 check_typedef (value_type),
1247 BLOCK_GCC_COMPILED (SYMBOL_BLOCK_VALUE (function)));
1249 print_return_value (struct_return, value_type);
1251 do_cleanups (old_chain);
1257 program_info (char *args, int from_tty)
1259 bpstat bs = stop_bpstat;
1260 int num = bpstat_num (&bs);
1262 if (!target_has_execution)
1264 printf_filtered ("The program being debugged is not being run.\n");
1268 target_files_info ();
1269 printf_filtered ("Program stopped at %s.\n",
1270 local_hex_string ((unsigned long) stop_pc));
1272 printf_filtered ("It stopped after being stepped.\n");
1275 /* There may be several breakpoints in the same place, so this
1276 isn't as strange as it seems. */
1281 printf_filtered ("It stopped at a breakpoint that has ");
1282 printf_filtered ("since been deleted.\n");
1285 printf_filtered ("It stopped at breakpoint %d.\n", num);
1286 num = bpstat_num (&bs);
1289 else if (stop_signal != TARGET_SIGNAL_0)
1291 printf_filtered ("It stopped with signal %s, %s.\n",
1292 target_signal_to_name (stop_signal),
1293 target_signal_to_string (stop_signal));
1298 printf_filtered ("Type \"info stack\" or \"info registers\" ");
1299 printf_filtered ("for more information.\n");
1304 environment_info (char *var, int from_tty)
1308 register char *val = get_in_environ (inferior_environ, var);
1311 puts_filtered (var);
1312 puts_filtered (" = ");
1313 puts_filtered (val);
1314 puts_filtered ("\n");
1318 puts_filtered ("Environment variable \"");
1319 puts_filtered (var);
1320 puts_filtered ("\" not defined.\n");
1325 register char **vector = environ_vector (inferior_environ);
1328 puts_filtered (*vector++);
1329 puts_filtered ("\n");
1335 set_environment_command (char *arg, int from_tty)
1337 register char *p, *val, *var;
1341 error_no_arg ("environment variable and value");
1343 /* Find seperation between variable name and value */
1344 p = (char *) strchr (arg, '=');
1345 val = (char *) strchr (arg, ' ');
1347 if (p != 0 && val != 0)
1349 /* We have both a space and an equals. If the space is before the
1350 equals, walk forward over the spaces til we see a nonspace
1351 (possibly the equals). */
1356 /* Now if the = is after the char following the spaces,
1357 take the char following the spaces. */
1361 else if (val != 0 && p == 0)
1365 error_no_arg ("environment variable to set");
1367 if (p == 0 || p[1] == 0)
1371 p = arg + strlen (arg); /* So that savestring below will work */
1375 /* Not setting variable value to null */
1377 while (*val == ' ' || *val == '\t')
1381 while (p != arg && (p[-1] == ' ' || p[-1] == '\t'))
1384 var = savestring (arg, p - arg);
1387 printf_filtered ("Setting environment variable ");
1388 printf_filtered ("\"%s\" to null value.\n", var);
1389 set_in_environ (inferior_environ, var, "");
1392 set_in_environ (inferior_environ, var, val);
1397 unset_environment_command (char *var, int from_tty)
1401 /* If there is no argument, delete all environment variables.
1402 Ask for confirmation if reading from the terminal. */
1403 if (!from_tty || query ("Delete all environment variables? "))
1405 free_environ (inferior_environ);
1406 inferior_environ = make_environ ();
1410 unset_in_environ (inferior_environ, var);
1413 /* Handle the execution path (PATH variable) */
1415 static const char path_var_name[] = "PATH";
1419 path_info (char *args, int from_tty)
1421 puts_filtered ("Executable and object file path: ");
1422 puts_filtered (get_in_environ (inferior_environ, path_var_name));
1423 puts_filtered ("\n");
1426 /* Add zero or more directories to the front of the execution path. */
1429 path_command (char *dirname, int from_tty)
1434 env = get_in_environ (inferior_environ, path_var_name);
1435 /* Can be null if path is not set */
1438 exec_path = strsave (env);
1439 mod_path (dirname, &exec_path);
1440 set_in_environ (inferior_environ, path_var_name, exec_path);
1443 path_info ((char *) NULL, from_tty);
1447 #ifdef REGISTER_NAMES
1448 char *gdb_register_names[] = REGISTER_NAMES;
1450 /* Print out the machine register regnum. If regnum is -1,
1451 print all registers (fpregs == 1) or all non-float registers
1454 For most machines, having all_registers_info() print the
1455 register(s) one per line is good enough. If a different format
1456 is required, (eg, for MIPS or Pyramid 90x, which both have
1457 lots of regs), or there is an existing convention for showing
1458 all the registers, define the macro DO_REGISTERS_INFO(regnum, fp)
1459 to provide that format. */
1462 do_registers_info (int regnum, int fpregs)
1465 int numregs = ARCH_NUM_REGS;
1467 for (i = 0; i < numregs; i++)
1469 char raw_buffer[MAX_REGISTER_RAW_SIZE];
1470 char virtual_buffer[MAX_REGISTER_VIRTUAL_SIZE];
1472 /* Decide between printing all regs, nonfloat regs, or specific reg. */
1475 if (TYPE_CODE (REGISTER_VIRTUAL_TYPE (i)) == TYPE_CODE_FLT && !fpregs)
1484 /* If the register name is empty, it is undefined for this
1485 processor, so don't display anything. */
1486 if (REGISTER_NAME (i) == NULL || *(REGISTER_NAME (i)) == '\0')
1489 fputs_filtered (REGISTER_NAME (i), gdb_stdout);
1490 print_spaces_filtered (15 - strlen (REGISTER_NAME (i)), gdb_stdout);
1492 /* Get the data in raw format. */
1493 if (read_relative_register_raw_bytes (i, raw_buffer))
1495 printf_filtered ("*value not available*\n");
1499 /* Convert raw data to virtual format if necessary. */
1500 if (REGISTER_CONVERTIBLE (i))
1502 REGISTER_CONVERT_TO_VIRTUAL (i, REGISTER_VIRTUAL_TYPE (i),
1503 raw_buffer, virtual_buffer);
1507 memcpy (virtual_buffer, raw_buffer,
1508 REGISTER_VIRTUAL_SIZE (i));
1511 /* If virtual format is floating, print it that way, and in raw hex. */
1512 if (TYPE_CODE (REGISTER_VIRTUAL_TYPE (i)) == TYPE_CODE_FLT)
1516 #ifdef INVALID_FLOAT
1517 if (INVALID_FLOAT (virtual_buffer, REGISTER_VIRTUAL_SIZE (i)))
1518 printf_filtered ("<invalid float>");
1521 val_print (REGISTER_VIRTUAL_TYPE (i), virtual_buffer, 0, 0,
1522 gdb_stdout, 0, 1, 0, Val_pretty_default);
1524 printf_filtered ("\t(raw 0x");
1525 for (j = 0; j < REGISTER_RAW_SIZE (i); j++)
1527 register int idx = TARGET_BYTE_ORDER == BIG_ENDIAN ? j
1528 : REGISTER_RAW_SIZE (i) - 1 - j;
1529 printf_filtered ("%02x", (unsigned char) raw_buffer[idx]);
1531 printf_filtered (")");
1534 /* FIXME! val_print probably can handle all of these cases now... */
1536 /* Else if virtual format is too long for printf,
1537 print in hex a byte at a time. */
1538 else if (REGISTER_VIRTUAL_SIZE (i) > (int) sizeof (long))
1541 printf_filtered ("0x");
1542 for (j = 0; j < REGISTER_VIRTUAL_SIZE (i); j++)
1543 printf_filtered ("%02x", (unsigned char) virtual_buffer[j]);
1545 /* Else print as integer in hex and in decimal. */
1548 val_print (REGISTER_VIRTUAL_TYPE (i), virtual_buffer, 0, 0,
1549 gdb_stdout, 'x', 1, 0, Val_pretty_default);
1550 printf_filtered ("\t");
1551 val_print (REGISTER_VIRTUAL_TYPE (i), virtual_buffer, 0, 0,
1552 gdb_stdout, 0, 1, 0, Val_pretty_default);
1555 /* The SPARC wants to print even-numbered float regs as doubles
1556 in addition to printing them as floats. */
1557 #ifdef PRINT_REGISTER_HOOK
1558 PRINT_REGISTER_HOOK (i);
1561 printf_filtered ("\n");
1566 registers_info (char *addr_exp, int fpregs)
1568 int regnum, numregs;
1571 if (!target_has_registers)
1572 error ("The program has no registers now.");
1573 if (selected_frame == NULL)
1574 error ("No selected frame.");
1578 DO_REGISTERS_INFO (-1, fpregs);
1584 if (addr_exp[0] == '$')
1587 while (*end != '\0' && *end != ' ' && *end != '\t')
1589 numregs = ARCH_NUM_REGS;
1591 regnum = target_map_name_to_register (addr_exp, end - addr_exp);
1597 if (*addr_exp >= '0' && *addr_exp <= '9')
1598 regnum = atoi (addr_exp); /* Take a number */
1599 if (regnum >= numregs) /* Bad name, or bad number */
1600 error ("%.*s: invalid register", end - addr_exp, addr_exp);
1603 DO_REGISTERS_INFO (regnum, fpregs);
1606 while (*addr_exp == ' ' || *addr_exp == '\t')
1609 while (*addr_exp != '\0');
1613 all_registers_info (char *addr_exp, int from_tty)
1615 registers_info (addr_exp, 1);
1619 nofp_registers_info (char *addr_exp, int from_tty)
1621 registers_info (addr_exp, 0);
1627 * Should save/restore the tty state since it might be that the
1628 * program to be debugged was started on this tty and it wants
1629 * the tty in some state other than what we want. If it's running
1630 * on another terminal or without a terminal, then saving and
1631 * restoring the tty state is a harmless no-op.
1632 * This only needs to be done if we are attaching to a process.
1637 takes a program started up outside of gdb and ``attaches'' to it.
1638 This stops it cold in its tracks and allows us to start debugging it.
1639 and wait for the trace-trap that results from attaching. */
1642 attach_command (char *args, int from_tty)
1645 extern int auto_solib_add;
1649 char *full_exec_path = NULL;
1651 dont_repeat (); /* Not for the faint of heart */
1653 if (target_has_execution)
1655 if (query ("A program is being debugged already. Kill it? "))
1658 error ("Not killed.");
1661 target_attach (args, from_tty);
1663 /* Set up the "saved terminal modes" of the inferior
1664 based on what modes we are starting it with. */
1665 target_terminal_init ();
1667 /* Install inferior's terminal modes. */
1668 target_terminal_inferior ();
1670 /* Set up execution context to know that we should return from
1671 wait_for_inferior as soon as the target reports a stop. */
1672 init_wait_for_inferior ();
1673 clear_proceed_status ();
1675 /* No traps are generated when attaching to inferior under Mach 3
1677 #ifndef ATTACH_NO_WAIT
1678 stop_soon_quietly = 1;
1679 wait_for_inferior ();
1683 * If no exec file is yet known, try to determine it from the
1686 exec_file = (char *) get_exec_file (0);
1689 exec_file = target_pid_to_exec_file (inferior_pid);
1692 /* It's possible we don't have a full path, but rather just a
1693 filename. Some targets, such as HP-UX, don't provide the
1696 Attempt to qualify the filename against the source path.
1697 (If that fails, we'll just fall back on the original
1698 filename. Not much more we can do...)
1700 if (!source_full_path_of (exec_file, &full_exec_path))
1701 full_exec_path = savestring (exec_file, strlen (exec_file));
1703 exec_file_attach (full_exec_path, from_tty);
1704 symbol_file_command (full_exec_path, from_tty);
1711 /* Add shared library symbols from the newly attached process, if any. */
1712 SOLIB_ADD ((char *) 0, from_tty, ¤t_target);
1713 re_enable_breakpoints_in_shlibs ();
1717 /* Take any necessary post-attaching actions for this platform.
1719 target_post_attach (inferior_pid);
1729 * takes a program previously attached to and detaches it.
1730 * The program resumes execution and will no longer stop
1731 * on signals, etc. We better not have left any breakpoints
1732 * in the program or it'll die when it hits one. For this
1733 * to work, it may be necessary for the process to have been
1734 * previously attached. It *might* work if the program was
1735 * started via the normal ptrace (PTRACE_TRACEME).
1739 detach_command (char *args, int from_tty)
1741 dont_repeat (); /* Not for the faint of heart */
1742 target_detach (args, from_tty);
1743 #if defined(SOLIB_RESTART)
1750 /* Stop the execution of the target while running in async mode, in
1754 interrupt_target_command_wrapper (char *args, int from_tty)
1756 interrupt_target_command (args, from_tty);
1760 interrupt_target_command (char *args, int from_tty)
1762 if (event_loop_p && target_can_async_p ())
1764 dont_repeat (); /* Not for the faint of heart */
1771 float_info (char *addr_exp, int from_tty)
1776 printf_filtered ("No floating point info available for this processor.\n");
1782 unset_command (char *args, int from_tty)
1784 printf_filtered ("\"unset\" must be followed by the name of ");
1785 printf_filtered ("an unset subcommand.\n");
1786 help_list (unsetlist, "unset ", -1, gdb_stdout);
1790 _initialize_infcmd (void)
1792 struct cmd_list_element *c;
1794 add_com ("tty", class_run, tty_command,
1795 "Set terminal for future runs of program being debugged.");
1798 (add_set_cmd ("args", class_run, var_string_noescape,
1799 (char *) &inferior_args,
1800 "Set argument list to give program being debugged when it is started.\n\
1801 Follow this command with any number of args, to be passed to the program.",
1806 ("environment", no_class, environment_info,
1807 "The environment to give the program, or one variable's value.\n\
1808 With an argument VAR, prints the value of environment variable VAR to\n\
1809 give the program being debugged. With no arguments, prints the entire\n\
1810 environment to be given to the program.", &showlist);
1811 c->completer = noop_completer;
1813 add_prefix_cmd ("unset", no_class, unset_command,
1814 "Complement to certain \"set\" commands",
1815 &unsetlist, "unset ", 0, &cmdlist);
1817 c = add_cmd ("environment", class_run, unset_environment_command,
1818 "Cancel environment variable VAR for the program.\n\
1819 This does not affect the program until the next \"run\" command.",
1821 c->completer = noop_completer;
1823 c = add_cmd ("environment", class_run, set_environment_command,
1824 "Set environment variable value to give the program.\n\
1825 Arguments are VAR VALUE where VAR is variable name and VALUE is value.\n\
1826 VALUES of environment variables are uninterpreted strings.\n\
1827 This does not affect the program until the next \"run\" command.",
1829 c->completer = noop_completer;
1831 add_com ("path", class_files, path_command,
1832 "Add directory DIR(s) to beginning of search path for object files.\n\
1833 $cwd in the path means the current working directory.\n\
1834 This path is equivalent to the $PATH shell variable. It is a list of\n\
1835 directories, separated by colons. These directories are searched to find\n\
1836 fully linked executable files and separately compiled object files as needed.");
1838 c = add_cmd ("paths", no_class, path_info,
1839 "Current search path for finding object files.\n\
1840 $cwd in the path means the current working directory.\n\
1841 This path is equivalent to the $PATH shell variable. It is a list of\n\
1842 directories, separated by colons. These directories are searched to find\n\
1843 fully linked executable files and separately compiled object files as needed.",
1845 c->completer = noop_completer;
1847 add_com ("attach", class_run, attach_command,
1848 "Attach to a process or file outside of GDB.\n\
1849 This command attaches to another target, of the same type as your last\n\
1850 \"target\" command (\"info files\" will show your target stack).\n\
1851 The command may take as argument a process id or a device file.\n\
1852 For a process id, you must have permission to send the process a signal,\n\
1853 and it must have the same effective uid as the debugger.\n\
1854 When using \"attach\" with a process id, the debugger finds the\n\
1855 program running in the process, looking first in the current working\n\
1856 directory, or (if not found there) using the source file search path\n\
1857 (see the \"directory\" command). You can also use the \"file\" command\n\
1858 to specify the program, and to load its symbol table.");
1860 add_com ("detach", class_run, detach_command,
1861 "Detach a process or file previously attached.\n\
1862 If a process, it is no longer traced, and it continues its execution. If\n\
1863 you were debugging a file, the file is closed and gdb no longer accesses it.");
1865 add_com ("signal", class_run, signal_command,
1866 "Continue program giving it signal specified by the argument.\n\
1867 An argument of \"0\" means continue program without giving it a signal.");
1869 add_com ("stepi", class_run, stepi_command,
1870 "Step one instruction exactly.\n\
1871 Argument N means do this N times (or till program stops for another reason).");
1872 add_com_alias ("si", "stepi", class_alias, 0);
1874 add_com ("nexti", class_run, nexti_command,
1875 "Step one instruction, but proceed through subroutine calls.\n\
1876 Argument N means do this N times (or till program stops for another reason).");
1877 add_com_alias ("ni", "nexti", class_alias, 0);
1879 add_com ("finish", class_run, finish_command,
1880 "Execute until selected stack frame returns.\n\
1881 Upon return, the value returned is printed and put in the value history.");
1883 add_com ("next", class_run, next_command,
1884 "Step program, proceeding through subroutine calls.\n\
1885 Like the \"step\" command as long as subroutine calls do not happen;\n\
1886 when they do, the call is treated as one instruction.\n\
1887 Argument N means do this N times (or till program stops for another reason).");
1888 add_com_alias ("n", "next", class_run, 1);
1890 add_com_alias ("S", "next", class_run, 1);
1892 add_com ("step", class_run, step_command,
1893 "Step program until it reaches a different source line.\n\
1894 Argument N means do this N times (or till program stops for another reason).");
1895 add_com_alias ("s", "step", class_run, 1);
1897 add_com ("until", class_run, until_command,
1898 "Execute until the program reaches a source line greater than the current\n\
1899 or a specified line or address or function (same args as break command).\n\
1900 Execution will also stop upon exit from the current stack frame.");
1901 add_com_alias ("u", "until", class_run, 1);
1903 add_com ("jump", class_run, jump_command,
1904 "Continue program being debugged at specified line or address.\n\
1905 Give as argument either LINENUM or *ADDR, where ADDR is an expression\n\
1906 for an address to start at.");
1909 add_com ("go", class_run, go_command,
1910 "Usage: go <location>\n\
1911 Continue program being debugged, stopping at specified line or \n\
1913 Give as argument either LINENUM or *ADDR, where ADDR is an \n\
1914 expression for an address to start at.\n\
1915 This command is a combination of tbreak and jump.");
1918 add_com_alias ("g", "go", class_run, 1);
1920 add_com ("continue", class_run, continue_command,
1921 "Continue program being debugged, after signal or breakpoint.\n\
1922 If proceeding from breakpoint, a number N may be used as an argument,\n\
1923 which means to set the ignore count of that breakpoint to N - 1 (so that\n\
1924 the breakpoint won't break until the Nth time it is reached).");
1925 add_com_alias ("c", "cont", class_run, 1);
1926 add_com_alias ("fg", "cont", class_run, 1);
1928 add_com ("run", class_run, run_command,
1929 "Start debugged program. You may specify arguments to give it.\n\
1930 Args may include \"*\", or \"[...]\"; they are expanded using \"sh\".\n\
1931 Input and output redirection with \">\", \"<\", or \">>\" are also allowed.\n\n\
1932 With no arguments, uses arguments last specified (with \"run\" or \"set args\").\n\
1933 To cancel previous arguments and run with no arguments,\n\
1934 use \"set args\" without arguments.");
1935 add_com_alias ("r", "run", class_run, 1);
1937 add_com ("R", class_run, run_no_args_command,
1938 "Start debugged program with no arguments.");
1940 add_com ("interrupt", class_run, interrupt_target_command,
1941 "Interrupt the execution of the debugged program.");
1943 add_info ("registers", nofp_registers_info,
1944 "List of integer registers and their contents, for selected stack frame.\n\
1945 Register name as argument means describe only that register.");
1946 add_info_alias ("r", "registers", 1);
1949 add_com ("lr", class_info, nofp_registers_info,
1950 "List of integer registers and their contents, for selected stack frame.\n\
1951 Register name as argument means describe only that register.");
1952 add_info ("all-registers", all_registers_info,
1953 "List of all registers and their contents, for selected stack frame.\n\
1954 Register name as argument means describe only that register.");
1956 add_info ("program", program_info,
1957 "Execution status of the program.");
1959 add_info ("float", float_info,
1960 "Print the status of the floating point unit\n");
1962 set_inferior_args (xstrdup ("")); /* Initially no args */
1963 inferior_environ = make_environ ();
1964 init_environ (inferior_environ);