1 /* Memory-access and commands for "inferior" process, for GDB.
2 Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
3 1996, 1997, 1998, 1999, 2000, 2001, 2002
4 Free Software Foundation, Inc.
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
25 #include "gdb_string.h"
39 #include "completer.h"
41 #include "event-top.h"
42 #include "parser-defs.h"
44 /* Functions exported for general use: */
46 void nofp_registers_info (char *, int);
48 void all_registers_info (char *, int);
50 void registers_info (char *, int);
52 /* Local functions: */
54 void continue_command (char *, int);
56 static void print_return_value (int struct_return, struct type *value_type);
58 static void finish_command_continuation (struct continuation_arg *);
60 static void until_next_command (int);
62 static void until_command (char *, int);
64 static void path_info (char *, int);
66 static void path_command (char *, int);
68 static void unset_command (char *, int);
70 static void float_info (char *, int);
72 static void detach_command (char *, int);
74 static void interrupt_target_command (char *args, int from_tty);
76 static void unset_environment_command (char *, int);
78 static void set_environment_command (char *, int);
80 static void environment_info (char *, int);
82 static void program_info (char *, int);
84 static void finish_command (char *, int);
86 static void signal_command (char *, int);
88 static void jump_command (char *, int);
90 static void step_1 (int, int, char *);
91 static void step_once (int skip_subroutines, int single_inst, int count);
92 static void step_1_continuation (struct continuation_arg *arg);
94 void nexti_command (char *, int);
96 void stepi_command (char *, int);
98 static void next_command (char *, int);
100 static void step_command (char *, int);
102 static void run_command (char *, int);
104 static void run_no_args_command (char *args, int from_tty);
106 static void go_command (char *line_no, int from_tty);
108 static int strip_bg_char (char **);
110 void _initialize_infcmd (void);
112 #define GO_USAGE "Usage: go <location>\n"
114 static void breakpoint_auto_delete_contents (PTR);
116 #define ERROR_NO_INFERIOR \
117 if (!target_has_execution) error ("The program is not being run.");
119 /* String containing arguments to give to the program, separated by spaces.
120 Empty string (pointer to '\0') means no args. */
122 static char *inferior_args;
124 /* The inferior arguments as a vector. If INFERIOR_ARGC is nonzero,
125 then we must compute INFERIOR_ARGS from this (via the target). */
127 static int inferior_argc;
128 static char **inferior_argv;
130 /* File name for default use for standard in/out in the inferior. */
132 char *inferior_io_terminal;
134 /* Pid of our debugged inferior, or 0 if no inferior now.
135 Since various parts of infrun.c test this to see whether there is a program
136 being debugged it should be nonzero (currently 3 is used) for remote
139 ptid_t inferior_ptid;
141 /* Last signal that the inferior received (why it stopped). */
143 enum target_signal stop_signal;
145 /* Address at which inferior stopped. */
149 /* Chain containing status of breakpoint(s) that we have stopped at. */
153 /* Flag indicating that a command has proceeded the inferior past the
154 current breakpoint. */
156 int breakpoint_proceeded;
158 /* Nonzero if stopped due to a step command. */
162 /* Nonzero if stopped due to completion of a stack dummy routine. */
164 int stop_stack_dummy;
166 /* Nonzero if stopped due to a random (unexpected) signal in inferior
169 int stopped_by_random_signal;
171 /* Range to single step within.
172 If this is nonzero, respond to a single-step signal
173 by continuing to step if the pc is in this range. */
175 CORE_ADDR step_range_start; /* Inclusive */
176 CORE_ADDR step_range_end; /* Exclusive */
178 /* Stack frame address as of when stepping command was issued.
179 This is how we know when we step into a subroutine call,
180 and how to set the frame for the breakpoint used to step out. */
182 CORE_ADDR step_frame_address;
184 /* Our notion of the current stack pointer. */
188 enum step_over_calls_kind step_over_calls;
190 /* If stepping, nonzero means step count is > 1
191 so don't print frame next time inferior stops
192 if it stops due to stepping. */
196 /* Environment to use for running inferior,
197 in format described in environ.h. */
199 struct environ *inferior_environ;
201 /* Accessor routines. */
204 get_inferior_args (void)
206 if (inferior_argc != 0)
210 n = gdbarch_construct_inferior_arguments (current_gdbarch,
211 inferior_argc, inferior_argv);
212 old = set_inferior_args (n);
216 if (inferior_args == NULL)
217 inferior_args = xstrdup ("");
219 return inferior_args;
223 set_inferior_args (char *newargs)
225 char *saved_args = inferior_args;
227 inferior_args = newargs;
235 set_inferior_args_vector (int argc, char **argv)
237 inferior_argc = argc;
238 inferior_argv = argv;
241 /* Notice when `set args' is run. */
243 notice_args_set (char *args, int from_tty, struct cmd_list_element *c)
249 /* Notice when `show args' is run. */
251 notice_args_read (struct cmd_list_element *c)
253 /* Might compute the value. */
254 get_inferior_args ();
258 /* Compute command-line string given argument vector. This does the
259 same shell processing as fork_inferior. */
262 construct_inferior_arguments (struct gdbarch *gdbarch, int argc, char **argv)
266 if (STARTUP_WITH_SHELL)
268 /* This holds all the characters considered special to the
269 typical Unix shells. We include `^' because the SunOS
270 /bin/sh treats it as a synonym for `|'. */
271 char *special = "\"!#$&*()\\|[]{}<>?'\"`~^; \t\n";
276 /* We over-compute the size. It shouldn't matter. */
277 for (i = 0; i < argc; ++i)
278 length += 2 * strlen (argv[i]) + 1;
280 result = (char *) xmalloc (length);
283 for (i = 0; i < argc; ++i)
288 for (cp = argv[i]; *cp; ++cp)
290 if (strchr (special, *cp) != NULL)
299 /* In this case we can't handle arguments that contain spaces,
300 tabs, or newlines -- see breakup_args(). */
304 for (i = 0; i < argc; ++i)
306 char *cp = strchr (argv[i], ' ');
308 cp = strchr (argv[i], '\t');
310 cp = strchr (argv[i], '\n');
312 error ("can't handle command-line argument containing whitespace");
313 length += strlen (argv[i]) + 1;
316 result = (char *) xmalloc (length);
318 for (i = 0; i < argc; ++i)
321 strcat (result, " ");
322 strcat (result, argv[i]);
330 /* This function detects whether or not a '&' character (indicating
331 background execution) has been added as *the last* of the arguments ARGS
332 of a command. If it has, it removes it and returns 1. Otherwise it
333 does nothing and returns 0. */
335 strip_bg_char (char **args)
339 p = strchr (*args, '&');
343 if (p == (*args + strlen (*args) - 1))
345 if (strlen (*args) > 1)
349 while (*p == ' ' || *p == '\t');
362 tty_command (char *file, int from_tty)
365 error_no_arg ("terminal name for running target process");
367 inferior_io_terminal = savestring (file, strlen (file));
371 run_command (char *args, int from_tty)
377 if (! ptid_equal (inferior_ptid, null_ptid) && target_has_execution)
380 && !query ("The program being debugged has been started already.\n\
381 Start it from the beginning? "))
382 error ("Program not restarted.");
384 #if defined(SOLIB_RESTART)
387 init_wait_for_inferior ();
390 clear_breakpoint_hit_counts ();
392 /* Purge old solib objfiles. */
393 objfile_purge_solibs ();
395 do_run_cleanups (NULL);
397 /* The comment here used to read, "The exec file is re-read every
398 time we do a generic_mourn_inferior, so we just have to worry
399 about the symbol file." The `generic_mourn_inferior' function
400 gets called whenever the program exits. However, suppose the
401 program exits, and *then* the executable file changes? We need
402 to check again here. Since reopen_exec_file doesn't do anything
403 if the timestamp hasn't changed, I don't see the harm. */
407 exec_file = (char *) get_exec_file (0);
409 /* We keep symbols from add-symbol-file, on the grounds that the
410 user might want to add some symbols before running the program
411 (right?). But sometimes (dynamic loading where the user manually
412 introduces the new symbols with add-symbol-file), the code which
413 the symbols describe does not persist between runs. Currently
414 the user has to manually nuke all symbols between runs if they
415 want them to go away (PR 2207). This is probably reasonable. */
419 if (event_loop_p && target_can_async_p ())
420 async_disable_stdin ();
424 int async_exec = strip_bg_char (&args);
426 /* If we get a request for running in the bg but the target
427 doesn't support it, error out. */
428 if (event_loop_p && async_exec && !target_can_async_p ())
429 error ("Asynchronous execution not supported on this target.");
431 /* If we don't get a request of running in the bg, then we need
432 to simulate synchronous (fg) execution. */
433 if (event_loop_p && !async_exec && target_can_async_p ())
435 /* Simulate synchronous execution */
436 async_disable_stdin ();
439 /* If there were other args, beside '&', process them. */
442 char *old_args = set_inferior_args (xstrdup (args));
449 ui_out_field_string (uiout, NULL, "Starting program");
450 ui_out_text (uiout, ": ");
452 ui_out_field_string (uiout, "execfile", exec_file);
453 ui_out_spaces (uiout, 1);
454 /* We call get_inferior_args() because we might need to compute
456 ui_out_field_string (uiout, "infargs", get_inferior_args ());
457 ui_out_text (uiout, "\n");
458 ui_out_flush (uiout);
461 /* We call get_inferior_args() because we might need to compute
463 target_create_inferior (exec_file, get_inferior_args (),
464 environ_vector (inferior_environ));
469 run_no_args_command (char *args, int from_tty)
471 char *old_args = set_inferior_args (xstrdup (""));
477 continue_command (char *proc_count_exp, int from_tty)
482 /* Find out whether we must run in the background. */
483 if (proc_count_exp != NULL)
484 async_exec = strip_bg_char (&proc_count_exp);
486 /* If we must run in the background, but the target can't do it,
488 if (event_loop_p && async_exec && !target_can_async_p ())
489 error ("Asynchronous execution not supported on this target.");
491 /* If we are not asked to run in the bg, then prepare to run in the
492 foreground, synchronously. */
493 if (event_loop_p && !async_exec && target_can_async_p ())
495 /* Simulate synchronous execution */
496 async_disable_stdin ();
499 /* If have argument (besides '&'), set proceed count of breakpoint
501 if (proc_count_exp != NULL)
503 bpstat bs = stop_bpstat;
504 int num = bpstat_num (&bs);
505 if (num == 0 && from_tty)
508 ("Not stopped at any breakpoint; argument ignored.\n");
512 set_ignore_count (num,
513 parse_and_eval_long (proc_count_exp) - 1,
515 /* set_ignore_count prints a message ending with a period.
516 So print two spaces before "Continuing.". */
518 printf_filtered (" ");
519 num = bpstat_num (&bs);
524 printf_filtered ("Continuing.\n");
526 clear_proceed_status ();
528 proceed ((CORE_ADDR) -1, TARGET_SIGNAL_DEFAULT, 0);
531 /* Step until outside of current statement. */
535 step_command (char *count_string, int from_tty)
537 step_1 (0, 0, count_string);
540 /* Likewise, but skip over subroutine calls as if single instructions. */
544 next_command (char *count_string, int from_tty)
546 step_1 (1, 0, count_string);
549 /* Likewise, but step only one instruction. */
553 stepi_command (char *count_string, int from_tty)
555 step_1 (0, 1, count_string);
560 nexti_command (char *count_string, int from_tty)
562 step_1 (1, 1, count_string);
566 disable_longjmp_breakpoint_cleanup (void *ignore)
568 disable_longjmp_breakpoint ();
572 step_1 (int skip_subroutines, int single_inst, char *count_string)
574 register int count = 1;
575 struct frame_info *frame;
576 struct cleanup *cleanups = 0;
582 async_exec = strip_bg_char (&count_string);
584 /* If we get a request for running in the bg but the target
585 doesn't support it, error out. */
586 if (event_loop_p && async_exec && !target_can_async_p ())
587 error ("Asynchronous execution not supported on this target.");
589 /* If we don't get a request of running in the bg, then we need
590 to simulate synchronous (fg) execution. */
591 if (event_loop_p && !async_exec && target_can_async_p ())
593 /* Simulate synchronous execution */
594 async_disable_stdin ();
597 count = count_string ? parse_and_eval_long (count_string) : 1;
599 if (!single_inst || skip_subroutines) /* leave si command alone */
601 enable_longjmp_breakpoint ();
602 if (!event_loop_p || !target_can_async_p ())
603 cleanups = make_cleanup (disable_longjmp_breakpoint_cleanup, 0 /*ignore*/);
605 make_exec_cleanup (disable_longjmp_breakpoint_cleanup, 0 /*ignore*/);
608 /* In synchronous case, all is well, just use the regular for loop. */
609 if (!event_loop_p || !target_can_async_p ())
611 for (; count > 0; count--)
613 clear_proceed_status ();
615 frame = get_current_frame ();
616 if (!frame) /* Avoid coredump here. Why tho? */
617 error ("No current frame");
618 step_frame_address = FRAME_FP (frame);
619 step_sp = read_sp ();
623 find_pc_line_pc_range (stop_pc, &step_range_start, &step_range_end);
624 if (step_range_end == 0)
627 if (find_pc_partial_function (stop_pc, &name, &step_range_start,
628 &step_range_end) == 0)
629 error ("Cannot find bounds of current function");
631 target_terminal_ours ();
633 Single stepping until exit from function %s, \n\
634 which has no line number information.\n", name);
639 /* Say we are stepping, but stop after one insn whatever it does. */
640 step_range_start = step_range_end = 1;
641 if (!skip_subroutines)
643 Don't step over function calls, not even to functions lacking
645 step_over_calls = STEP_OVER_NONE;
648 if (skip_subroutines)
649 step_over_calls = STEP_OVER_ALL;
651 step_multi = (count > 1);
652 proceed ((CORE_ADDR) -1, TARGET_SIGNAL_DEFAULT, 1);
657 /* FIXME: On nexti, this may have already been done (when we hit the
658 step resume break, I think). Probably this should be moved to
659 wait_for_inferior (near the top). */
660 #if defined (SHIFT_INST_REGS)
665 if (!single_inst || skip_subroutines)
666 do_cleanups (cleanups);
669 /* In case of asynchronous target things get complicated, do only
670 one step for now, before returning control to the event loop. Let
671 the continuation figure out how many other steps we need to do,
672 and handle them one at the time, through step_once(). */
675 if (event_loop_p && target_can_async_p ())
676 step_once (skip_subroutines, single_inst, count);
680 /* Called after we are done with one step operation, to check whether
681 we need to step again, before we print the prompt and return control
682 to the user. If count is > 1, we will need to do one more call to
683 proceed(), via step_once(). Basically it is like step_once and
684 step_1_continuation are co-recursive. */
686 step_1_continuation (struct continuation_arg *arg)
689 int skip_subroutines;
692 skip_subroutines = arg->data.integer;
693 single_inst = arg->next->data.integer;
694 count = arg->next->next->data.integer;
698 /* FIXME: On nexti, this may have already been done (when we hit the
699 step resume break, I think). Probably this should be moved to
700 wait_for_inferior (near the top). */
701 #if defined (SHIFT_INST_REGS)
704 step_once (skip_subroutines, single_inst, count - 1);
707 if (!single_inst || skip_subroutines)
708 do_exec_cleanups (ALL_CLEANUPS);
711 /* Do just one step operation. If count >1 we will have to set up a
712 continuation to be done after the target stops (after this one
713 step). This is useful to implement the 'step n' kind of commands, in
714 case of asynchronous targets. We had to split step_1 into two parts,
715 one to be done before proceed() and one afterwards. This function is
716 called in case of step n with n>1, after the first step operation has
719 step_once (int skip_subroutines, int single_inst, int count)
721 struct continuation_arg *arg1;
722 struct continuation_arg *arg2;
723 struct continuation_arg *arg3;
724 struct frame_info *frame;
728 clear_proceed_status ();
730 frame = get_current_frame ();
731 if (!frame) /* Avoid coredump here. Why tho? */
732 error ("No current frame");
733 step_frame_address = FRAME_FP (frame);
734 step_sp = read_sp ();
738 find_pc_line_pc_range (stop_pc, &step_range_start, &step_range_end);
740 /* If we have no line info, switch to stepi mode. */
741 if (step_range_end == 0 && step_stop_if_no_debug)
743 step_range_start = step_range_end = 1;
745 else if (step_range_end == 0)
748 if (find_pc_partial_function (stop_pc, &name, &step_range_start,
749 &step_range_end) == 0)
750 error ("Cannot find bounds of current function");
752 target_terminal_ours ();
754 Single stepping until exit from function %s, \n\
755 which has no line number information.\n", name);
760 /* Say we are stepping, but stop after one insn whatever it does. */
761 step_range_start = step_range_end = 1;
762 if (!skip_subroutines)
764 Don't step over function calls, not even to functions lacking
766 step_over_calls = STEP_OVER_NONE;
769 if (skip_subroutines)
770 step_over_calls = STEP_OVER_ALL;
772 step_multi = (count > 1);
774 (struct continuation_arg *) xmalloc (sizeof (struct continuation_arg));
776 (struct continuation_arg *) xmalloc (sizeof (struct continuation_arg));
778 (struct continuation_arg *) xmalloc (sizeof (struct continuation_arg));
780 arg1->data.integer = skip_subroutines;
782 arg2->data.integer = single_inst;
784 arg3->data.integer = count;
785 add_intermediate_continuation (step_1_continuation, arg1);
786 proceed ((CORE_ADDR) -1, TARGET_SIGNAL_DEFAULT, 1);
791 /* Continue program at specified address. */
794 jump_command (char *arg, int from_tty)
796 register CORE_ADDR addr;
797 struct symtabs_and_lines sals;
798 struct symtab_and_line sal;
805 /* Find out whether we must run in the background. */
807 async_exec = strip_bg_char (&arg);
809 /* If we must run in the background, but the target can't do it,
811 if (event_loop_p && async_exec && !target_can_async_p ())
812 error ("Asynchronous execution not supported on this target.");
814 /* If we are not asked to run in the bg, then prepare to run in the
815 foreground, synchronously. */
816 if (event_loop_p && !async_exec && target_can_async_p ())
818 /* Simulate synchronous execution */
819 async_disable_stdin ();
823 error_no_arg ("starting address");
825 sals = decode_line_spec_1 (arg, 1);
828 error ("Unreasonable jump request");
834 if (sal.symtab == 0 && sal.pc == 0)
835 error ("No source file has been specified.");
837 resolve_sal_pc (&sal); /* May error out */
839 /* See if we are trying to jump to another function. */
840 fn = get_frame_function (get_current_frame ());
841 sfn = find_pc_function (sal.pc);
842 if (fn != NULL && sfn != fn)
844 if (!query ("Line %d is not in `%s'. Jump anyway? ", sal.line,
845 SYMBOL_SOURCE_NAME (fn)))
847 error ("Not confirmed.");
854 fixup_symbol_section (sfn, 0);
855 if (section_is_overlay (SYMBOL_BFD_SECTION (sfn)) &&
856 !section_is_mapped (SYMBOL_BFD_SECTION (sfn)))
858 if (!query ("WARNING!!! Destination is in unmapped overlay! Jump anyway? "))
860 error ("Not confirmed.");
870 printf_filtered ("Continuing at ");
871 print_address_numeric (addr, 1, gdb_stdout);
872 printf_filtered (".\n");
875 clear_proceed_status ();
876 proceed (addr, TARGET_SIGNAL_0, 0);
880 /* Go to line or address in current procedure */
882 go_command (char *line_no, int from_tty)
884 if (line_no == (char *) NULL || !*line_no)
885 printf_filtered (GO_USAGE);
888 tbreak_command (line_no, from_tty);
889 jump_command (line_no, from_tty);
894 /* Continue program giving it specified signal. */
897 signal_command (char *signum_exp, int from_tty)
899 enum target_signal oursig;
901 dont_repeat (); /* Too dangerous. */
905 error_no_arg ("signal number");
907 /* It would be even slicker to make signal names be valid expressions,
908 (the type could be "enum $signal" or some such), then the user could
909 assign them to convenience variables. */
910 oursig = target_signal_from_name (signum_exp);
912 if (oursig == TARGET_SIGNAL_UNKNOWN)
914 /* No, try numeric. */
915 int num = parse_and_eval_long (signum_exp);
918 oursig = TARGET_SIGNAL_0;
920 oursig = target_signal_from_command (num);
925 if (oursig == TARGET_SIGNAL_0)
926 printf_filtered ("Continuing with no signal.\n");
928 printf_filtered ("Continuing with signal %s.\n",
929 target_signal_to_name (oursig));
932 clear_proceed_status ();
933 /* "signal 0" should not get stuck if we are stopped at a breakpoint.
934 FIXME: Neither should "signal foo" but when I tried passing
935 (CORE_ADDR)-1 unconditionally I got a testsuite failure which I haven't
936 tried to track down yet. */
937 proceed (oursig == TARGET_SIGNAL_0 ? (CORE_ADDR) -1 : stop_pc, oursig, 0);
940 /* Call breakpoint_auto_delete on the current contents of the bpstat
941 pointed to by arg (which is really a bpstat *). */
944 breakpoint_auto_delete_contents (PTR arg)
946 breakpoint_auto_delete (*(bpstat *) arg);
950 /* Execute a "stack dummy", a piece of code stored in the stack
951 by the debugger to be executed in the inferior.
953 To call: first, do PUSH_DUMMY_FRAME.
954 Then push the contents of the dummy. It should end with a breakpoint insn.
955 Then call here, passing address at which to start the dummy.
957 The contents of all registers are saved before the dummy frame is popped
958 and copied into the buffer BUFFER.
960 The dummy's frame is automatically popped whenever that break is hit.
961 If that is the first time the program stops, run_stack_dummy
962 returns to its caller with that frame already gone and returns 0.
964 Otherwise, run_stack-dummy returns a non-zero value.
965 If the called function receives a random signal, we do not allow the user
966 to continue executing it as this may not work. The dummy frame is poped
968 If we hit a breakpoint, we leave the frame in place and return 2 (the frame
969 will eventually be popped when we do hit the dummy end breakpoint). */
972 run_stack_dummy (CORE_ADDR addr, char *buffer)
974 struct cleanup *old_cleanups = make_cleanup (null_cleanup, 0);
977 /* Now proceed, having reached the desired place. */
978 clear_proceed_status ();
980 if (CALL_DUMMY_BREAKPOINT_OFFSET_P)
982 struct breakpoint *bpt;
983 struct symtab_and_line sal;
985 INIT_SAL (&sal); /* initialize to zeroes */
986 if (CALL_DUMMY_LOCATION == AT_ENTRY_POINT)
988 sal.pc = CALL_DUMMY_ADDRESS ();
992 sal.pc = addr - CALL_DUMMY_START_OFFSET + CALL_DUMMY_BREAKPOINT_OFFSET;
994 sal.section = find_pc_overlay (sal.pc);
996 /* Set up a FRAME for the dummy frame so we can pass it to
997 set_momentary_breakpoint. We need to give the breakpoint a
998 frame in case there is only one copy of the dummy (e.g.
999 CALL_DUMMY_LOCATION == AFTER_TEXT_END). */
1000 flush_cached_frames ();
1001 set_current_frame (create_new_frame (read_fp (), sal.pc));
1003 /* If defined, CALL_DUMMY_BREAKPOINT_OFFSET is where we need to put
1004 a breakpoint instruction. If not, the call dummy already has the
1005 breakpoint instruction in it.
1007 addr is the address of the call dummy plus the CALL_DUMMY_START_OFFSET,
1008 so we need to subtract the CALL_DUMMY_START_OFFSET. */
1009 bpt = set_momentary_breakpoint (sal,
1010 get_current_frame (),
1012 bpt->disposition = disp_del;
1014 /* If all error()s out of proceed ended up calling normal_stop (and
1015 perhaps they should; it already does in the special case of error
1016 out of resume()), then we wouldn't need this. */
1017 make_cleanup (breakpoint_auto_delete_contents, &stop_bpstat);
1020 disable_watchpoints_before_interactive_call_start ();
1021 proceed_to_finish = 1; /* We want stop_registers, please... */
1023 if (target_can_async_p ())
1024 saved_async = target_async_mask (0);
1026 proceed (addr, TARGET_SIGNAL_0, 0);
1029 target_async_mask (saved_async);
1031 enable_watchpoints_after_interactive_call_stop ();
1033 discard_cleanups (old_cleanups);
1035 /* We can stop during an inferior call because a signal is received. */
1036 if (stopped_by_random_signal)
1039 /* We may also stop prematurely because we hit a breakpoint in the
1041 if (!stop_stack_dummy)
1044 /* On normal return, the stack dummy has been popped already. */
1046 memcpy (buffer, stop_registers, REGISTER_BYTES);
1050 /* Proceed until we reach a different source line with pc greater than
1051 our current one or exit the function. We skip calls in both cases.
1053 Note that eventually this command should probably be changed so
1054 that only source lines are printed out when we hit the breakpoint
1055 we set. This may involve changes to wait_for_inferior and the
1056 proceed status code. */
1060 until_next_command (int from_tty)
1062 struct frame_info *frame;
1064 struct symbol *func;
1065 struct symtab_and_line sal;
1067 clear_proceed_status ();
1069 frame = get_current_frame ();
1071 /* Step until either exited from this function or greater
1072 than the current line (if in symbolic section) or pc (if
1076 func = find_pc_function (pc);
1080 struct minimal_symbol *msymbol = lookup_minimal_symbol_by_pc (pc);
1082 if (msymbol == NULL)
1083 error ("Execution is not within a known function.");
1085 step_range_start = SYMBOL_VALUE_ADDRESS (msymbol);
1086 step_range_end = pc;
1090 sal = find_pc_line (pc, 0);
1092 step_range_start = BLOCK_START (SYMBOL_BLOCK_VALUE (func));
1093 step_range_end = sal.end;
1096 step_over_calls = STEP_OVER_ALL;
1097 step_frame_address = FRAME_FP (frame);
1098 step_sp = read_sp ();
1100 step_multi = 0; /* Only one call to proceed */
1102 proceed ((CORE_ADDR) -1, TARGET_SIGNAL_DEFAULT, 1);
1106 until_command (char *arg, int from_tty)
1110 if (!target_has_execution)
1111 error ("The program is not running.");
1113 /* Find out whether we must run in the background. */
1115 async_exec = strip_bg_char (&arg);
1117 /* If we must run in the background, but the target can't do it,
1119 if (event_loop_p && async_exec && !target_can_async_p ())
1120 error ("Asynchronous execution not supported on this target.");
1122 /* If we are not asked to run in the bg, then prepare to run in the
1123 foreground, synchronously. */
1124 if (event_loop_p && !async_exec && target_can_async_p ())
1126 /* Simulate synchronous execution */
1127 async_disable_stdin ();
1131 until_break_command (arg, from_tty);
1133 until_next_command (from_tty);
1137 /* Print the result of a function at the end of a 'finish' command. */
1139 print_return_value (int structure_return, struct type *value_type)
1141 struct value *value;
1142 static struct ui_stream *stb = NULL;
1144 if (!structure_return)
1146 value = value_being_returned (value_type, stop_registers, structure_return);
1147 stb = ui_out_stream_new (uiout);
1148 ui_out_text (uiout, "Value returned is ");
1149 ui_out_field_fmt (uiout, "gdb-result-var", "$%d", record_latest_value (value));
1150 ui_out_text (uiout, " = ");
1151 value_print (value, stb->stream, 0, Val_no_prettyprint);
1152 ui_out_field_stream (uiout, "return-value", stb);
1153 ui_out_text (uiout, "\n");
1157 /* We cannot determine the contents of the structure because
1158 it is on the stack, and we don't know where, since we did not
1159 initiate the call, as opposed to the call_function_by_hand case */
1160 #ifdef VALUE_RETURNED_FROM_STACK
1162 ui_out_text (uiout, "Value returned has type: ");
1163 ui_out_field_string (uiout, "return-type", TYPE_NAME (value_type));
1164 ui_out_text (uiout, ".");
1165 ui_out_text (uiout, " Cannot determine contents\n");
1167 value = value_being_returned (value_type, stop_registers, structure_return);
1168 stb = ui_out_stream_new (uiout);
1169 ui_out_text (uiout, "Value returned is ");
1170 ui_out_field_fmt (uiout, "gdb-result-var", "$%d", record_latest_value (value));
1171 ui_out_text (uiout, " = ");
1172 value_print (value, stb->stream, 0, Val_no_prettyprint);
1173 ui_out_field_stream (uiout, "return-value", stb);
1174 ui_out_text (uiout, "\n");
1179 /* Stuff that needs to be done by the finish command after the target
1180 has stopped. In asynchronous mode, we wait for the target to stop in
1181 the call to poll or select in the event loop, so it is impossible to
1182 do all the stuff as part of the finish_command function itself. The
1183 only chance we have to complete this command is in
1184 fetch_inferior_event, which is called by the event loop as soon as it
1185 detects that the target has stopped. This function is called via the
1186 cmd_continuation pointer. */
1188 finish_command_continuation (struct continuation_arg *arg)
1190 register struct symbol *function;
1191 struct breakpoint *breakpoint;
1192 struct cleanup *cleanups;
1194 breakpoint = (struct breakpoint *) arg->data.pointer;
1195 function = (struct symbol *) arg->next->data.pointer;
1196 cleanups = (struct cleanup *) arg->next->next->data.pointer;
1198 if (bpstat_find_breakpoint (stop_bpstat, breakpoint) != NULL
1201 struct type *value_type;
1205 value_type = TYPE_TARGET_TYPE (SYMBOL_TYPE (function));
1207 internal_error (__FILE__, __LINE__,
1208 "finish_command: function has no target type");
1210 if (TYPE_CODE (value_type) == TYPE_CODE_VOID)
1212 do_exec_cleanups (cleanups);
1216 funcaddr = BLOCK_START (SYMBOL_BLOCK_VALUE (function));
1218 struct_return = using_struct_return (value_of_variable (function, NULL),
1220 check_typedef (value_type),
1221 BLOCK_GCC_COMPILED (SYMBOL_BLOCK_VALUE (function)));
1223 print_return_value (struct_return, value_type);
1225 do_exec_cleanups (cleanups);
1228 /* "finish": Set a temporary breakpoint at the place
1229 the selected frame will return to, then continue. */
1232 finish_command (char *arg, int from_tty)
1234 struct symtab_and_line sal;
1235 register struct frame_info *frame;
1236 register struct symbol *function;
1237 struct breakpoint *breakpoint;
1238 struct cleanup *old_chain;
1239 struct continuation_arg *arg1, *arg2, *arg3;
1243 /* Find out whether we must run in the background. */
1245 async_exec = strip_bg_char (&arg);
1247 /* If we must run in the background, but the target can't do it,
1249 if (event_loop_p && async_exec && !target_can_async_p ())
1250 error ("Asynchronous execution not supported on this target.");
1252 /* If we are not asked to run in the bg, then prepare to run in the
1253 foreground, synchronously. */
1254 if (event_loop_p && !async_exec && target_can_async_p ())
1256 /* Simulate synchronous execution */
1257 async_disable_stdin ();
1261 error ("The \"finish\" command does not take any arguments.");
1262 if (!target_has_execution)
1263 error ("The program is not running.");
1264 if (selected_frame == NULL)
1265 error ("No selected frame.");
1267 frame = get_prev_frame (selected_frame);
1269 error ("\"finish\" not meaningful in the outermost frame.");
1271 clear_proceed_status ();
1273 sal = find_pc_line (frame->pc, 0);
1276 breakpoint = set_momentary_breakpoint (sal, frame, bp_finish);
1278 if (!event_loop_p || !target_can_async_p ())
1279 old_chain = make_cleanup_delete_breakpoint (breakpoint);
1281 old_chain = make_exec_cleanup_delete_breakpoint (breakpoint);
1283 /* Find the function we will return from. */
1285 function = find_pc_function (selected_frame->pc);
1287 /* Print info on the selected frame, including level number
1291 printf_filtered ("Run till exit from ");
1292 print_stack_frame (selected_frame, selected_frame_level, 0);
1295 /* If running asynchronously and the target support asynchronous
1296 execution, set things up for the rest of the finish command to be
1297 completed later on, when gdb has detected that the target has
1298 stopped, in fetch_inferior_event. */
1299 if (event_loop_p && target_can_async_p ())
1302 (struct continuation_arg *) xmalloc (sizeof (struct continuation_arg));
1304 (struct continuation_arg *) xmalloc (sizeof (struct continuation_arg));
1306 (struct continuation_arg *) xmalloc (sizeof (struct continuation_arg));
1310 arg1->data.pointer = breakpoint;
1311 arg2->data.pointer = function;
1312 arg3->data.pointer = old_chain;
1313 add_continuation (finish_command_continuation, arg1);
1316 proceed_to_finish = 1; /* We want stop_registers, please... */
1317 proceed ((CORE_ADDR) -1, TARGET_SIGNAL_DEFAULT, 0);
1319 /* Do this only if not running asynchronously or if the target
1320 cannot do async execution. Otherwise, complete this command when
1321 the target actually stops, in fetch_inferior_event. */
1322 if (!event_loop_p || !target_can_async_p ())
1325 /* Did we stop at our breakpoint? */
1326 if (bpstat_find_breakpoint (stop_bpstat, breakpoint) != NULL
1329 struct type *value_type;
1333 value_type = TYPE_TARGET_TYPE (SYMBOL_TYPE (function));
1335 internal_error (__FILE__, __LINE__,
1336 "finish_command: function has no target type");
1338 /* FIXME: Shouldn't we do the cleanups before returning? */
1339 if (TYPE_CODE (value_type) == TYPE_CODE_VOID)
1342 funcaddr = BLOCK_START (SYMBOL_BLOCK_VALUE (function));
1345 using_struct_return (value_of_variable (function, NULL),
1347 check_typedef (value_type),
1348 BLOCK_GCC_COMPILED (SYMBOL_BLOCK_VALUE (function)));
1350 print_return_value (struct_return, value_type);
1352 do_cleanups (old_chain);
1358 program_info (char *args, int from_tty)
1360 bpstat bs = stop_bpstat;
1361 int num = bpstat_num (&bs);
1363 if (!target_has_execution)
1365 printf_filtered ("The program being debugged is not being run.\n");
1369 target_files_info ();
1370 printf_filtered ("Program stopped at %s.\n",
1371 local_hex_string ((unsigned long) stop_pc));
1373 printf_filtered ("It stopped after being stepped.\n");
1376 /* There may be several breakpoints in the same place, so this
1377 isn't as strange as it seems. */
1382 printf_filtered ("It stopped at a breakpoint that has ");
1383 printf_filtered ("since been deleted.\n");
1386 printf_filtered ("It stopped at breakpoint %d.\n", num);
1387 num = bpstat_num (&bs);
1390 else if (stop_signal != TARGET_SIGNAL_0)
1392 printf_filtered ("It stopped with signal %s, %s.\n",
1393 target_signal_to_name (stop_signal),
1394 target_signal_to_string (stop_signal));
1399 printf_filtered ("Type \"info stack\" or \"info registers\" ");
1400 printf_filtered ("for more information.\n");
1405 environment_info (char *var, int from_tty)
1409 register char *val = get_in_environ (inferior_environ, var);
1412 puts_filtered (var);
1413 puts_filtered (" = ");
1414 puts_filtered (val);
1415 puts_filtered ("\n");
1419 puts_filtered ("Environment variable \"");
1420 puts_filtered (var);
1421 puts_filtered ("\" not defined.\n");
1426 register char **vector = environ_vector (inferior_environ);
1429 puts_filtered (*vector++);
1430 puts_filtered ("\n");
1436 set_environment_command (char *arg, int from_tty)
1438 register char *p, *val, *var;
1442 error_no_arg ("environment variable and value");
1444 /* Find seperation between variable name and value */
1445 p = (char *) strchr (arg, '=');
1446 val = (char *) strchr (arg, ' ');
1448 if (p != 0 && val != 0)
1450 /* We have both a space and an equals. If the space is before the
1451 equals, walk forward over the spaces til we see a nonspace
1452 (possibly the equals). */
1457 /* Now if the = is after the char following the spaces,
1458 take the char following the spaces. */
1462 else if (val != 0 && p == 0)
1466 error_no_arg ("environment variable to set");
1468 if (p == 0 || p[1] == 0)
1472 p = arg + strlen (arg); /* So that savestring below will work */
1476 /* Not setting variable value to null */
1478 while (*val == ' ' || *val == '\t')
1482 while (p != arg && (p[-1] == ' ' || p[-1] == '\t'))
1485 var = savestring (arg, p - arg);
1488 printf_filtered ("Setting environment variable ");
1489 printf_filtered ("\"%s\" to null value.\n", var);
1490 set_in_environ (inferior_environ, var, "");
1493 set_in_environ (inferior_environ, var, val);
1498 unset_environment_command (char *var, int from_tty)
1502 /* If there is no argument, delete all environment variables.
1503 Ask for confirmation if reading from the terminal. */
1504 if (!from_tty || query ("Delete all environment variables? "))
1506 free_environ (inferior_environ);
1507 inferior_environ = make_environ ();
1511 unset_in_environ (inferior_environ, var);
1514 /* Handle the execution path (PATH variable) */
1516 static const char path_var_name[] = "PATH";
1520 path_info (char *args, int from_tty)
1522 puts_filtered ("Executable and object file path: ");
1523 puts_filtered (get_in_environ (inferior_environ, path_var_name));
1524 puts_filtered ("\n");
1527 /* Add zero or more directories to the front of the execution path. */
1530 path_command (char *dirname, int from_tty)
1535 env = get_in_environ (inferior_environ, path_var_name);
1536 /* Can be null if path is not set */
1539 exec_path = xstrdup (env);
1540 mod_path (dirname, &exec_path);
1541 set_in_environ (inferior_environ, path_var_name, exec_path);
1544 path_info ((char *) NULL, from_tty);
1548 #ifdef REGISTER_NAMES
1549 char *gdb_register_names[] = REGISTER_NAMES;
1551 /* Print out the machine register regnum. If regnum is -1,
1552 print all registers (fpregs == 1) or all non-float registers
1555 For most machines, having all_registers_info() print the
1556 register(s) one per line is good enough. If a different format
1557 is required, (eg, for MIPS or Pyramid 90x, which both have
1558 lots of regs), or there is an existing convention for showing
1559 all the registers, define the macro DO_REGISTERS_INFO(regnum, fp)
1560 to provide that format. */
1563 do_registers_info (int regnum, int fpregs)
1566 int numregs = NUM_REGS + NUM_PSEUDO_REGS;
1567 char *raw_buffer = (char*) alloca (MAX_REGISTER_RAW_SIZE);
1568 char *virtual_buffer = (char*) alloca (MAX_REGISTER_VIRTUAL_SIZE);
1570 for (i = 0; i < numregs; i++)
1572 /* Decide between printing all regs, nonfloat regs, or specific reg. */
1575 if (TYPE_CODE (REGISTER_VIRTUAL_TYPE (i)) == TYPE_CODE_FLT && !fpregs)
1584 /* If the register name is empty, it is undefined for this
1585 processor, so don't display anything. */
1586 if (REGISTER_NAME (i) == NULL || *(REGISTER_NAME (i)) == '\0')
1589 fputs_filtered (REGISTER_NAME (i), gdb_stdout);
1590 print_spaces_filtered (15 - strlen (REGISTER_NAME (i)), gdb_stdout);
1592 /* Get the data in raw format. */
1593 if (read_relative_register_raw_bytes (i, raw_buffer))
1595 printf_filtered ("*value not available*\n");
1599 /* Convert raw data to virtual format if necessary. */
1600 if (REGISTER_CONVERTIBLE (i))
1602 REGISTER_CONVERT_TO_VIRTUAL (i, REGISTER_VIRTUAL_TYPE (i),
1603 raw_buffer, virtual_buffer);
1607 memcpy (virtual_buffer, raw_buffer,
1608 REGISTER_VIRTUAL_SIZE (i));
1611 /* If virtual format is floating, print it that way, and in raw hex. */
1612 if (TYPE_CODE (REGISTER_VIRTUAL_TYPE (i)) == TYPE_CODE_FLT)
1616 val_print (REGISTER_VIRTUAL_TYPE (i), virtual_buffer, 0, 0,
1617 gdb_stdout, 0, 1, 0, Val_pretty_default);
1619 printf_filtered ("\t(raw 0x");
1620 for (j = 0; j < REGISTER_RAW_SIZE (i); j++)
1622 register int idx = TARGET_BYTE_ORDER == BFD_ENDIAN_BIG ? j
1623 : REGISTER_RAW_SIZE (i) - 1 - j;
1624 printf_filtered ("%02x", (unsigned char) raw_buffer[idx]);
1626 printf_filtered (")");
1628 /* Else print as integer in hex and in decimal. */
1631 val_print (REGISTER_VIRTUAL_TYPE (i), virtual_buffer, 0, 0,
1632 gdb_stdout, 'x', 1, 0, Val_pretty_default);
1633 printf_filtered ("\t");
1634 val_print (REGISTER_VIRTUAL_TYPE (i), virtual_buffer, 0, 0,
1635 gdb_stdout, 0, 1, 0, Val_pretty_default);
1638 /* The SPARC wants to print even-numbered float regs as doubles
1639 in addition to printing them as floats. */
1640 #ifdef PRINT_REGISTER_HOOK
1641 PRINT_REGISTER_HOOK (i);
1644 printf_filtered ("\n");
1649 registers_info (char *addr_exp, int fpregs)
1651 int regnum, numregs;
1654 if (!target_has_registers)
1655 error ("The program has no registers now.");
1656 if (selected_frame == NULL)
1657 error ("No selected frame.");
1661 DO_REGISTERS_INFO (-1, fpregs);
1667 if (addr_exp[0] == '$')
1670 while (*end != '\0' && *end != ' ' && *end != '\t')
1672 numregs = NUM_REGS + NUM_PSEUDO_REGS;
1674 regnum = target_map_name_to_register (addr_exp, end - addr_exp);
1680 if (*addr_exp >= '0' && *addr_exp <= '9')
1681 regnum = atoi (addr_exp); /* Take a number */
1682 if (regnum >= numregs) /* Bad name, or bad number */
1683 error ("%.*s: invalid register", end - addr_exp, addr_exp);
1686 DO_REGISTERS_INFO (regnum, fpregs);
1689 while (*addr_exp == ' ' || *addr_exp == '\t')
1692 while (*addr_exp != '\0');
1696 all_registers_info (char *addr_exp, int from_tty)
1698 registers_info (addr_exp, 1);
1702 nofp_registers_info (char *addr_exp, int from_tty)
1704 registers_info (addr_exp, 0);
1710 * Should save/restore the tty state since it might be that the
1711 * program to be debugged was started on this tty and it wants
1712 * the tty in some state other than what we want. If it's running
1713 * on another terminal or without a terminal, then saving and
1714 * restoring the tty state is a harmless no-op.
1715 * This only needs to be done if we are attaching to a process.
1720 takes a program started up outside of gdb and ``attaches'' to it.
1721 This stops it cold in its tracks and allows us to start debugging it.
1722 and wait for the trace-trap that results from attaching. */
1725 attach_command (char *args, int from_tty)
1728 char *full_exec_path = NULL;
1730 dont_repeat (); /* Not for the faint of heart */
1732 if (target_has_execution)
1734 if (query ("A program is being debugged already. Kill it? "))
1737 error ("Not killed.");
1740 target_attach (args, from_tty);
1742 /* Set up the "saved terminal modes" of the inferior
1743 based on what modes we are starting it with. */
1744 target_terminal_init ();
1746 /* Install inferior's terminal modes. */
1747 target_terminal_inferior ();
1749 /* Set up execution context to know that we should return from
1750 wait_for_inferior as soon as the target reports a stop. */
1751 init_wait_for_inferior ();
1752 clear_proceed_status ();
1754 /* No traps are generated when attaching to inferior under Mach 3
1756 #ifndef ATTACH_NO_WAIT
1757 stop_soon_quietly = 1;
1758 wait_for_inferior ();
1762 * If no exec file is yet known, try to determine it from the
1765 exec_file = (char *) get_exec_file (0);
1768 exec_file = target_pid_to_exec_file (PIDGET (inferior_ptid));
1771 /* It's possible we don't have a full path, but rather just a
1772 filename. Some targets, such as HP-UX, don't provide the
1775 Attempt to qualify the filename against the source path.
1776 (If that fails, we'll just fall back on the original
1777 filename. Not much more we can do...)
1779 if (!source_full_path_of (exec_file, &full_exec_path))
1780 full_exec_path = savestring (exec_file, strlen (exec_file));
1782 exec_file_attach (full_exec_path, from_tty);
1783 symbol_file_add_main (full_exec_path, from_tty);
1788 /* Add shared library symbols from the newly attached process, if any. */
1789 SOLIB_ADD ((char *) 0, from_tty, ¤t_target, auto_solib_add);
1790 re_enable_breakpoints_in_shlibs ();
1793 /* Take any necessary post-attaching actions for this platform.
1795 target_post_attach (PIDGET (inferior_ptid));
1805 * takes a program previously attached to and detaches it.
1806 * The program resumes execution and will no longer stop
1807 * on signals, etc. We better not have left any breakpoints
1808 * in the program or it'll die when it hits one. For this
1809 * to work, it may be necessary for the process to have been
1810 * previously attached. It *might* work if the program was
1811 * started via the normal ptrace (PTRACE_TRACEME).
1815 detach_command (char *args, int from_tty)
1817 dont_repeat (); /* Not for the faint of heart */
1818 target_detach (args, from_tty);
1819 #if defined(SOLIB_RESTART)
1826 /* Stop the execution of the target while running in async mode, in
1830 interrupt_target_command_wrapper (char *args, int from_tty)
1832 interrupt_target_command (args, from_tty);
1836 interrupt_target_command (char *args, int from_tty)
1838 if (event_loop_p && target_can_async_p ())
1840 dont_repeat (); /* Not for the faint of heart */
1847 float_info (char *addr_exp, int from_tty)
1852 printf_filtered ("No floating point info available for this processor.\n");
1858 unset_command (char *args, int from_tty)
1860 printf_filtered ("\"unset\" must be followed by the name of ");
1861 printf_filtered ("an unset subcommand.\n");
1862 help_list (unsetlist, "unset ", -1, gdb_stdout);
1866 _initialize_infcmd (void)
1868 struct cmd_list_element *c;
1870 c = add_com ("tty", class_run, tty_command,
1871 "Set terminal for future runs of program being debugged.");
1872 c->completer = filename_completer;
1874 c = add_set_cmd ("args", class_run, var_string_noescape,
1875 (char *) &inferior_args,
1876 "Set argument list to give program being debugged when it is started.\n\
1877 Follow this command with any number of args, to be passed to the program.",
1879 c->completer = filename_completer;
1880 c->function.sfunc = notice_args_set;
1881 c = add_show_from_set (c, &showlist);
1882 c->pre_show_hook = notice_args_read;
1885 ("environment", no_class, environment_info,
1886 "The environment to give the program, or one variable's value.\n\
1887 With an argument VAR, prints the value of environment variable VAR to\n\
1888 give the program being debugged. With no arguments, prints the entire\n\
1889 environment to be given to the program.", &showlist);
1890 c->completer = noop_completer;
1892 add_prefix_cmd ("unset", no_class, unset_command,
1893 "Complement to certain \"set\" commands",
1894 &unsetlist, "unset ", 0, &cmdlist);
1896 c = add_cmd ("environment", class_run, unset_environment_command,
1897 "Cancel environment variable VAR for the program.\n\
1898 This does not affect the program until the next \"run\" command.",
1900 c->completer = noop_completer;
1902 c = add_cmd ("environment", class_run, set_environment_command,
1903 "Set environment variable value to give the program.\n\
1904 Arguments are VAR VALUE where VAR is variable name and VALUE is value.\n\
1905 VALUES of environment variables are uninterpreted strings.\n\
1906 This does not affect the program until the next \"run\" command.",
1908 c->completer = noop_completer;
1910 c = add_com ("path", class_files, path_command,
1911 "Add directory DIR(s) to beginning of search path for object files.\n\
1912 $cwd in the path means the current working directory.\n\
1913 This path is equivalent to the $PATH shell variable. It is a list of\n\
1914 directories, separated by colons. These directories are searched to find\n\
1915 fully linked executable files and separately compiled object files as needed.");
1916 c->completer = filename_completer;
1918 c = add_cmd ("paths", no_class, path_info,
1919 "Current search path for finding object files.\n\
1920 $cwd in the path means the current working directory.\n\
1921 This path is equivalent to the $PATH shell variable. It is a list of\n\
1922 directories, separated by colons. These directories are searched to find\n\
1923 fully linked executable files and separately compiled object files as needed.",
1925 c->completer = noop_completer;
1927 add_com ("attach", class_run, attach_command,
1928 "Attach to a process or file outside of GDB.\n\
1929 This command attaches to another target, of the same type as your last\n\
1930 \"target\" command (\"info files\" will show your target stack).\n\
1931 The command may take as argument a process id or a device file.\n\
1932 For a process id, you must have permission to send the process a signal,\n\
1933 and it must have the same effective uid as the debugger.\n\
1934 When using \"attach\" with a process id, the debugger finds the\n\
1935 program running in the process, looking first in the current working\n\
1936 directory, or (if not found there) using the source file search path\n\
1937 (see the \"directory\" command). You can also use the \"file\" command\n\
1938 to specify the program, and to load its symbol table.");
1940 add_com ("detach", class_run, detach_command,
1941 "Detach a process or file previously attached.\n\
1942 If a process, it is no longer traced, and it continues its execution. If\n\
1943 you were debugging a file, the file is closed and gdb no longer accesses it.");
1945 add_com ("signal", class_run, signal_command,
1946 "Continue program giving it signal specified by the argument.\n\
1947 An argument of \"0\" means continue program without giving it a signal.");
1949 add_com ("stepi", class_run, stepi_command,
1950 "Step one instruction exactly.\n\
1951 Argument N means do this N times (or till program stops for another reason).");
1952 add_com_alias ("si", "stepi", class_alias, 0);
1954 add_com ("nexti", class_run, nexti_command,
1955 "Step one instruction, but proceed through subroutine calls.\n\
1956 Argument N means do this N times (or till program stops for another reason).");
1957 add_com_alias ("ni", "nexti", class_alias, 0);
1959 add_com ("finish", class_run, finish_command,
1960 "Execute until selected stack frame returns.\n\
1961 Upon return, the value returned is printed and put in the value history.");
1963 add_com ("next", class_run, next_command,
1964 "Step program, proceeding through subroutine calls.\n\
1965 Like the \"step\" command as long as subroutine calls do not happen;\n\
1966 when they do, the call is treated as one instruction.\n\
1967 Argument N means do this N times (or till program stops for another reason).");
1968 add_com_alias ("n", "next", class_run, 1);
1970 add_com_alias ("S", "next", class_run, 1);
1972 add_com ("step", class_run, step_command,
1973 "Step program until it reaches a different source line.\n\
1974 Argument N means do this N times (or till program stops for another reason).");
1975 add_com_alias ("s", "step", class_run, 1);
1977 c = add_com ("until", class_run, until_command,
1978 "Execute until the program reaches a source line greater than the current\n\
1979 or a specified line or address or function (same args as break command).\n\
1980 Execution will also stop upon exit from the current stack frame.");
1981 c->completer = location_completer;
1982 add_com_alias ("u", "until", class_run, 1);
1984 c = add_com ("jump", class_run, jump_command,
1985 "Continue program being debugged at specified line or address.\n\
1986 Give as argument either LINENUM or *ADDR, where ADDR is an expression\n\
1987 for an address to start at.");
1988 c->completer = location_completer;
1992 c = add_com ("go", class_run, go_command,
1993 "Usage: go <location>\n\
1994 Continue program being debugged, stopping at specified line or \n\
1996 Give as argument either LINENUM or *ADDR, where ADDR is an \n\
1997 expression for an address to start at.\n\
1998 This command is a combination of tbreak and jump.");
1999 c->completer = location_completer;
2003 add_com_alias ("g", "go", class_run, 1);
2005 add_com ("continue", class_run, continue_command,
2006 "Continue program being debugged, after signal or breakpoint.\n\
2007 If proceeding from breakpoint, a number N may be used as an argument,\n\
2008 which means to set the ignore count of that breakpoint to N - 1 (so that\n\
2009 the breakpoint won't break until the Nth time it is reached).");
2010 add_com_alias ("c", "cont", class_run, 1);
2011 add_com_alias ("fg", "cont", class_run, 1);
2013 c = add_com ("run", class_run, run_command,
2014 "Start debugged program. You may specify arguments to give it.\n\
2015 Args may include \"*\", or \"[...]\"; they are expanded using \"sh\".\n\
2016 Input and output redirection with \">\", \"<\", or \">>\" are also allowed.\n\n\
2017 With no arguments, uses arguments last specified (with \"run\" or \"set args\").\n\
2018 To cancel previous arguments and run with no arguments,\n\
2019 use \"set args\" without arguments.");
2020 c->completer = filename_completer;
2021 add_com_alias ("r", "run", class_run, 1);
2023 add_com ("R", class_run, run_no_args_command,
2024 "Start debugged program with no arguments.");
2026 add_com ("interrupt", class_run, interrupt_target_command,
2027 "Interrupt the execution of the debugged program.");
2029 add_info ("registers", nofp_registers_info,
2030 "List of integer registers and their contents, for selected stack frame.\n\
2031 Register name as argument means describe only that register.");
2032 add_info_alias ("r", "registers", 1);
2035 add_com ("lr", class_info, nofp_registers_info,
2036 "List of integer registers and their contents, for selected stack frame.\n\
2037 Register name as argument means describe only that register.");
2038 add_info ("all-registers", all_registers_info,
2039 "List of all registers and their contents, for selected stack frame.\n\
2040 Register name as argument means describe only that register.");
2042 add_info ("program", program_info,
2043 "Execution status of the program.");
2045 add_info ("float", float_info,
2046 "Print the status of the floating point unit\n");
2048 inferior_environ = make_environ ();
2049 init_environ (inferior_environ);