1 /* Memory-access and commands for "inferior" (child) process, for GDB.
2 Copyright 1986, 1987, 1988, 1989, 1991, 1992 Free Software Foundation, Inc.
4 This file is part of GDB.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
22 #include <sys/param.h>
35 continue_command
PARAMS ((char *, int));
38 until_next_command
PARAMS ((int));
41 until_command
PARAMS ((char *, int));
44 path_info
PARAMS ((char *, int));
47 path_command
PARAMS ((char *, int));
50 unset_command
PARAMS ((char *, int));
53 float_info
PARAMS ((char *, int));
56 detach_command
PARAMS ((char *, int));
59 nofp_registers_info
PARAMS ((char *, int));
62 all_registers_info
PARAMS ((char *, int));
65 registers_info
PARAMS ((char *, int));
68 do_registers_info
PARAMS ((int, int));
71 unset_environment_command
PARAMS ((char *, int));
74 set_environment_command
PARAMS ((char *, int));
77 environment_info
PARAMS ((char *, int));
80 program_info
PARAMS ((char *, int));
83 finish_command
PARAMS ((char *, int));
86 signal_command
PARAMS ((char *, int));
89 jump_command
PARAMS ((char *, int));
92 step_1
PARAMS ((int, int, char *));
95 nexti_command
PARAMS ((char *, int));
98 stepi_command
PARAMS ((char *, int));
101 next_command
PARAMS ((char *, int));
104 step_command
PARAMS ((char *, int));
107 run_command
PARAMS ((char *, int));
109 #define ERROR_NO_INFERIOR \
110 if (!target_has_execution) error ("The program is not being run.");
112 /* String containing arguments to give to the program, separated by spaces.
113 Empty string (pointer to '\0') means no args. */
115 static char *inferior_args
;
117 /* File name for default use for standard in/out in the inferior. */
119 char *inferior_io_terminal
;
121 /* Pid of our debugged inferior, or 0 if no inferior now.
122 Since various parts of infrun.c test this to see whether there is a program
123 being debugged it should be nonzero (currently 3 is used) for remote
128 /* Last signal that the inferior received (why it stopped). */
132 /* Address at which inferior stopped. */
136 /* Stack frame when program stopped. */
138 FRAME_ADDR stop_frame_address
;
140 /* Chain containing status of breakpoint(s) that we have stopped at. */
144 /* Flag indicating that a command has proceeded the inferior past the
145 current breakpoint. */
147 int breakpoint_proceeded
;
149 /* Nonzero if stopped due to a step command. */
153 /* Nonzero if stopped due to completion of a stack dummy routine. */
155 int stop_stack_dummy
;
157 /* Nonzero if stopped due to a random (unexpected) signal in inferior
160 int stopped_by_random_signal
;
162 /* Range to single step within.
163 If this is nonzero, respond to a single-step signal
164 by continuing to step if the pc is in this range. */
166 CORE_ADDR step_range_start
; /* Inclusive */
167 CORE_ADDR step_range_end
; /* Exclusive */
169 /* Stack frame address as of when stepping command was issued.
170 This is how we know when we step into a subroutine call,
171 and how to set the frame for the breakpoint used to step out. */
173 FRAME_ADDR step_frame_address
;
175 /* 1 means step over all subroutine calls.
176 0 means don't step over calls (used by stepi).
177 -1 means step over calls to undebuggable functions. */
181 /* If stepping, nonzero means step count is > 1
182 so don't print frame next time inferior stops
183 if it stops due to stepping. */
187 /* Environment to use for running inferior,
188 in format described in environ.h. */
190 struct environ
*inferior_environ
;
195 tty_command (file
, from_tty
)
200 error_no_arg ("terminal name for running target process");
202 inferior_io_terminal
= savestring (file
, strlen (file
));
206 run_command (args
, from_tty
)
214 /* Shouldn't this be target_has_execution? FIXME. */
218 !query ("The program being debugged has been started already.\n\
219 Start it from the beginning? "))
220 error ("Program not restarted.");
224 exec_file
= (char *) get_exec_file (0);
226 /* The exec file is re-read every time we do a generic_mourn_inferior, so
227 we just have to worry about the symbol file. */
233 cmd
= concat ("set args ", args
, NULL
);
234 make_cleanup (free
, cmd
);
235 execute_command (cmd
, from_tty
);
240 puts_filtered("Starting program: ");
242 puts_filtered(exec_file
);
244 puts_filtered(inferior_args
);
249 target_create_inferior (exec_file
, inferior_args
,
250 environ_vector (inferior_environ
));
254 continue_command (proc_count_exp
, from_tty
)
255 char *proc_count_exp
;
260 /* If have argument, set proceed count of breakpoint we stopped at. */
262 if (proc_count_exp
!= NULL
)
264 bpstat bs
= stop_bpstat
;
265 int num
= bpstat_num (&bs
);
266 if (num
== 0 && from_tty
)
269 ("Not stopped at any breakpoint; argument ignored.\n");
273 set_ignore_count (num
,
274 parse_and_eval_address (proc_count_exp
) - 1,
276 /* set_ignore_count prints a message ending with a period.
277 So print two spaces before "Continuing.". */
279 printf_filtered (" ");
280 num
= bpstat_num (&bs
);
285 printf_filtered ("Continuing.\n");
287 clear_proceed_status ();
289 proceed ((CORE_ADDR
) -1, -1, 0);
292 /* Step until outside of current statement. */
296 step_command (count_string
, from_tty
)
300 step_1 (0, 0, count_string
);
303 /* Likewise, but skip over subroutine calls as if single instructions. */
307 next_command (count_string
, from_tty
)
311 step_1 (1, 0, count_string
);
314 /* Likewise, but step only one instruction. */
318 stepi_command (count_string
, from_tty
)
322 step_1 (0, 1, count_string
);
327 nexti_command (count_string
, from_tty
)
331 step_1 (1, 1, count_string
);
335 step_1 (skip_subroutines
, single_inst
, count_string
)
336 int skip_subroutines
;
340 register int count
= 1;
342 struct cleanup
*cleanups
= 0;
345 count
= count_string
? parse_and_eval_address (count_string
) : 1;
347 if (!single_inst
|| skip_subroutines
) /* leave si command alone */
349 enable_longjmp_breakpoint();
350 cleanups
= make_cleanup(disable_longjmp_breakpoint
, 0);
353 for (; count
> 0; count
--)
355 clear_proceed_status ();
357 fr
= get_current_frame ();
358 if (!fr
) /* Avoid coredump here. Why tho? */
359 error ("No current frame");
360 step_frame_address
= FRAME_FP (fr
);
364 find_pc_line_pc_range (stop_pc
, &step_range_start
, &step_range_end
);
365 if (step_range_end
== 0)
368 if (find_pc_partial_function (stop_pc
, &name
, &step_range_start
,
369 &step_range_end
) == 0)
370 error ("Cannot find bounds of current function");
372 target_terminal_ours ();
374 Single stepping until exit from function %s, \n\
375 which has no line number information.\n", name
);
381 /* Say we are stepping, but stop after one insn whatever it does. */
382 step_range_start
= step_range_end
= 1;
383 if (!skip_subroutines
)
385 Don't step over function calls, not even to functions lacking
390 if (skip_subroutines
)
393 step_multi
= (count
> 1);
394 proceed ((CORE_ADDR
) -1, -1, 1);
397 #if defined (SHIFT_INST_REGS)
398 write_register (NNPC_REGNUM
, read_register (NPC_REGNUM
));
399 write_register (NPC_REGNUM
, read_register (PC_REGNUM
));
403 if (!single_inst
|| skip_subroutines
)
404 do_cleanups(cleanups
);
407 /* Continue program at specified address. */
410 jump_command (arg
, from_tty
)
414 register CORE_ADDR addr
;
415 struct symtabs_and_lines sals
;
416 struct symtab_and_line sal
;
423 error_no_arg ("starting address");
425 sals
= decode_line_spec_1 (arg
, 1);
428 error ("Unreasonable jump request");
432 free ((PTR
)sals
.sals
);
434 if (sal
.symtab
== 0 && sal
.pc
== 0)
435 error ("No source file has been specified.");
437 resolve_sal_pc (&sal
); /* May error out */
439 /* See if we are trying to jump to another function. */
440 fn
= get_frame_function (get_current_frame ());
441 sfn
= find_pc_function (sal
.pc
);
442 if (fn
!= NULL
&& sfn
!= fn
)
444 if (!query ("Line %d is not in `%s'. Jump anyway? ", sal
.line
,
445 SYMBOL_SOURCE_NAME (fn
)))
447 error ("Not confirmed.");
452 addr
= ADDR_BITS_SET (sal
.pc
);
455 printf_filtered ("Continuing at %s.\n", local_hex_string(addr
));
457 clear_proceed_status ();
458 proceed (addr
, 0, 0);
461 /* Continue program giving it specified signal. */
464 signal_command (signum_exp
, from_tty
)
470 dont_repeat (); /* Too dangerous. */
474 error_no_arg ("signal number");
476 /* It would be even slicker to make signal names be valid expressions,
477 (the type could be "enum $signal" or some such), then the user could
478 assign them to convenience variables. */
479 signum
= strtosigno (signum_exp
);
482 /* Not found as a name, try it as an expression. */
483 signum
= parse_and_eval_address (signum_exp
);
487 char *signame
= strsigno (signum
);
488 printf_filtered ("Continuing with signal ");
489 if (signame
== NULL
|| signum
== 0)
490 printf_filtered ("%d.\n", signum
);
492 /* Do we need to print the number as well as the name? */
493 printf_filtered ("%s (%d).\n", signame
, signum
);
496 clear_proceed_status ();
497 proceed (stop_pc
, signum
, 0);
500 /* Execute a "stack dummy", a piece of code stored in the stack
501 by the debugger to be executed in the inferior.
503 To call: first, do PUSH_DUMMY_FRAME.
504 Then push the contents of the dummy. It should end with a breakpoint insn.
505 Then call here, passing address at which to start the dummy.
507 The contents of all registers are saved before the dummy frame is popped
508 and copied into the buffer BUFFER.
510 The dummy's frame is automatically popped whenever that break is hit.
511 If that is the first time the program stops, run_stack_dummy
512 returns to its caller with that frame already gone and returns 0.
513 Otherwise, run_stack-dummy returns 1 (the frame will eventually be popped
514 when we do hit that breakpoint). */
516 /* DEBUG HOOK: 4 => return instead of letting the stack dummy run. */
518 static int stack_dummy_testing
= 0;
521 run_stack_dummy (addr
, buffer
)
523 char buffer
[REGISTER_BYTES
];
525 /* Now proceed, having reached the desired place. */
526 clear_proceed_status ();
527 if (stack_dummy_testing
& 4)
532 proceed_to_finish
= 1; /* We want stop_registers, please... */
533 proceed (addr
, 0, 0);
535 if (!stop_stack_dummy
)
538 /* On return, the stack dummy has been popped already. */
540 memcpy (buffer
, stop_registers
, sizeof stop_registers
);
544 /* Proceed until we reach a different source line with pc greater than
545 our current one or exit the function. We skip calls in both cases.
547 Note that eventually this command should probably be changed so
548 that only source lines are printed out when we hit the breakpoint
549 we set. I'm going to postpone this until after a hopeful rewrite
550 of wait_for_inferior and the proceed status code. -- randy */
554 until_next_command (from_tty
)
560 struct symtab_and_line sal
;
562 clear_proceed_status ();
564 frame
= get_current_frame ();
566 /* Step until either exited from this function or greater
567 than the current line (if in symbolic section) or pc (if
571 func
= find_pc_function (pc
);
575 struct minimal_symbol
*msymbol
= lookup_minimal_symbol_by_pc (pc
);
578 error ("Execution is not within a known function.");
580 step_range_start
= SYMBOL_VALUE_ADDRESS (msymbol
);
585 sal
= find_pc_line (pc
, 0);
587 step_range_start
= BLOCK_START (SYMBOL_BLOCK_VALUE (func
));
588 step_range_end
= sal
.end
;
592 step_frame_address
= FRAME_FP (frame
);
594 step_multi
= 0; /* Only one call to proceed */
596 proceed ((CORE_ADDR
) -1, -1, 1);
600 until_command (arg
, from_tty
)
604 if (!target_has_execution
)
605 error ("The program is not running.");
607 until_break_command (arg
, from_tty
);
609 until_next_command (from_tty
);
612 /* "finish": Set a temporary breakpoint at the place
613 the selected frame will return to, then continue. */
616 finish_command (arg
, from_tty
)
620 struct symtab_and_line sal
;
621 register FRAME frame
;
622 struct frame_info
*fi
;
623 register struct symbol
*function
;
624 struct breakpoint
*breakpoint
;
625 struct cleanup
*old_chain
;
628 error ("The \"finish\" command does not take any arguments.");
629 if (!target_has_execution
)
630 error ("The program is not running.");
631 if (selected_frame
== NULL
)
632 error ("No selected frame.");
634 frame
= get_prev_frame (selected_frame
);
636 error ("\"finish\" not meaningful in the outermost frame.");
638 clear_proceed_status ();
640 fi
= get_frame_info (frame
);
641 sal
= find_pc_line (fi
->pc
, 0);
644 breakpoint
= set_momentary_breakpoint (sal
, frame
, bp_finish
);
646 old_chain
= make_cleanup(delete_breakpoint
, breakpoint
);
648 /* Find the function we will return from. */
650 fi
= get_frame_info (selected_frame
);
651 function
= find_pc_function (fi
->pc
);
653 /* Print info on the selected frame, including level number
657 printf_filtered ("Run till exit from ");
658 print_stack_frame (selected_frame
, selected_frame_level
, 0);
661 proceed_to_finish
= 1; /* We want stop_registers, please... */
662 proceed ((CORE_ADDR
) -1, -1, 0);
664 /* Did we stop at our breakpoint? */
665 if (bpstat_find_breakpoint(stop_bpstat
, breakpoint
) != NULL
668 struct type
*value_type
;
672 value_type
= TYPE_TARGET_TYPE (SYMBOL_TYPE (function
));
674 fatal ("internal: finish_command: function has no target type");
676 if (TYPE_CODE (value_type
) == TYPE_CODE_VOID
)
679 funcaddr
= BLOCK_START (SYMBOL_BLOCK_VALUE (function
));
681 val
= value_being_returned (value_type
, stop_registers
,
682 using_struct_return (value_of_variable (function
, NULL
),
685 BLOCK_GCC_COMPILED (SYMBOL_BLOCK_VALUE (function
))));
687 printf_filtered ("Value returned is $%d = ", record_latest_value (val
));
688 value_print (val
, stdout
, 0, Val_no_prettyprint
);
689 printf_filtered ("\n");
691 do_cleanups(old_chain
);
696 program_info (args
, from_tty
)
700 bpstat bs
= stop_bpstat
;
701 int num
= bpstat_num (&bs
);
703 if (!target_has_execution
)
705 printf_filtered ("The program being debugged is not being run.\n");
709 target_files_info ();
710 printf_filtered ("Program stopped at %s.\n", local_hex_string(stop_pc
));
712 printf_filtered ("It stopped after being stepped.\n");
715 /* There may be several breakpoints in the same place, so this
716 isn't as strange as it seems. */
720 printf_filtered ("It stopped at a breakpoint that has since been deleted.\n");
722 printf_filtered ("It stopped at breakpoint %d.\n", num
);
723 num
= bpstat_num (&bs
);
726 else if (stop_signal
)
728 #ifdef PRINT_RANDOM_SIGNAL
729 PRINT_RANDOM_SIGNAL (stop_signal
);
731 char *signame
= strsigno (stop_signal
);
732 printf_filtered ("It stopped with signal ");
734 printf_filtered ("%d", stop_signal
);
736 /* Do we need to print the number as well as the name? */
737 printf_filtered ("%s (%d)", signame
, stop_signal
);
738 printf_filtered (", %s.\n", safe_strsignal (stop_signal
));
743 printf_filtered ("Type \"info stack\" or \"info registers\" for more information.\n");
747 environment_info (var
, from_tty
)
753 register char *val
= get_in_environ (inferior_environ
, var
);
757 puts_filtered (" = ");
759 puts_filtered ("\n");
763 puts_filtered ("Environment variable \"");
765 puts_filtered ("\" not defined.\n");
770 register char **vector
= environ_vector (inferior_environ
);
773 puts_filtered (*vector
++);
774 puts_filtered ("\n");
780 set_environment_command (arg
, from_tty
)
784 register char *p
, *val
, *var
;
788 error_no_arg ("environment variable and value");
790 /* Find seperation between variable name and value */
791 p
= (char *) strchr (arg
, '=');
792 val
= (char *) strchr (arg
, ' ');
794 if (p
!= 0 && val
!= 0)
796 /* We have both a space and an equals. If the space is before the
797 equals, walk forward over the spaces til we see a nonspace
798 (possibly the equals). */
803 /* Now if the = is after the char following the spaces,
804 take the char following the spaces. */
808 else if (val
!= 0 && p
== 0)
812 error_no_arg ("environment variable to set");
814 if (p
== 0 || p
[1] == 0)
818 p
= arg
+ strlen (arg
); /* So that savestring below will work */
822 /* Not setting variable value to null */
824 while (*val
== ' ' || *val
== '\t')
828 while (p
!= arg
&& (p
[-1] == ' ' || p
[-1] == '\t')) p
--;
830 var
= savestring (arg
, p
- arg
);
833 printf_filtered ("Setting environment variable \"%s\" to null value.\n", var
);
834 set_in_environ (inferior_environ
, var
, "");
837 set_in_environ (inferior_environ
, var
, val
);
842 unset_environment_command (var
, from_tty
)
848 /* If there is no argument, delete all environment variables.
849 Ask for confirmation if reading from the terminal. */
850 if (!from_tty
|| query ("Delete all environment variables? "))
852 free_environ (inferior_environ
);
853 inferior_environ
= make_environ ();
857 unset_in_environ (inferior_environ
, var
);
860 /* Handle the execution path (PATH variable) */
862 static const char path_var_name
[] = "PATH";
866 path_info (args
, from_tty
)
870 puts_filtered ("Executable and object file path: ");
871 puts_filtered (get_in_environ (inferior_environ
, path_var_name
));
872 puts_filtered ("\n");
875 /* Add zero or more directories to the front of the execution path. */
878 path_command (dirname
, from_tty
)
885 exec_path
= strsave (get_in_environ (inferior_environ
, path_var_name
));
886 mod_path (dirname
, &exec_path
);
887 set_in_environ (inferior_environ
, path_var_name
, exec_path
);
890 path_info ((char *)NULL
, from_tty
);
893 /* This routine is getting awfully cluttered with #if's. It's probably
894 time to turn this into READ_PC and define it in the tm.h file.
895 Ditto for write_pc. */
900 #ifdef TARGET_READ_PC
901 return TARGET_READ_PC ();
903 return ADDR_BITS_REMOVE ((CORE_ADDR
) read_register (PC_REGNUM
));
911 #ifdef TARGET_WRITE_PC
912 TARGET_WRITE_PC (val
);
914 write_register (PC_REGNUM
, (long) val
);
916 write_register (NPC_REGNUM
, (long) val
+ 4);
918 write_register (NNPC_REGNUM
, (long) val
+ 8);
924 /* Cope with strage ways of getting to the stack and frame pointers */
929 #ifdef TARGET_READ_SP
930 return TARGET_READ_SP ();
932 return read_register (SP_REGNUM
);
940 #ifdef TARGET_WRITE_SP
941 TARGET_WRITE_SP (val
);
943 write_register (SP_REGNUM
, val
);
951 #ifdef TARGET_READ_FP
952 return TARGET_READ_FP ();
954 return read_register (FP_REGNUM
);
962 #ifdef TARGET_WRITE_FP
963 TARGET_WRITE_FP (val
);
965 write_register (FP_REGNUM
, val
);
969 const char * const reg_names
[] = REGISTER_NAMES
;
971 /* Print out the machine register regnum. If regnum is -1,
972 print all registers (fpregs == 1) or all non-float registers
975 For most machines, having all_registers_info() print the
976 register(s) one per line is good enough. If a different format
977 is required, (eg, for MIPS or Pyramid 90x, which both have
978 lots of regs), or there is an existing convention for showing
979 all the registers, define the macro DO_REGISTERS_INFO(regnum, fp)
980 to provide that format. */
982 #if !defined (DO_REGISTERS_INFO)
983 #define DO_REGISTERS_INFO(regnum, fp) do_registers_info(regnum, fp)
985 do_registers_info (regnum
, fpregs
)
991 for (i
= 0; i
< NUM_REGS
; i
++)
993 char raw_buffer
[MAX_REGISTER_RAW_SIZE
];
994 char virtual_buffer
[MAX_REGISTER_VIRTUAL_SIZE
];
996 /* Decide between printing all regs, nonfloat regs, or specific reg. */
998 if (TYPE_CODE (REGISTER_VIRTUAL_TYPE (i
)) == TYPE_CODE_FLT
&& !fpregs
)
1005 fputs_filtered (reg_names
[i
], stdout
);
1006 print_spaces_filtered (15 - strlen (reg_names
[i
]), stdout
);
1008 /* Get the data in raw format, then convert also to virtual format. */
1009 if (read_relative_register_raw_bytes (i
, raw_buffer
))
1011 printf_filtered ("Invalid register contents\n");
1015 REGISTER_CONVERT_TO_VIRTUAL (i
, raw_buffer
, virtual_buffer
);
1017 /* If virtual format is floating, print it that way, and in raw hex. */
1018 if (TYPE_CODE (REGISTER_VIRTUAL_TYPE (i
)) == TYPE_CODE_FLT
1019 && ! INVALID_FLOAT (virtual_buffer
, REGISTER_VIRTUAL_SIZE (i
)))
1023 val_print (REGISTER_VIRTUAL_TYPE (i
), virtual_buffer
, 0,
1024 stdout
, 0, 1, 0, Val_pretty_default
);
1026 printf_filtered ("\t(raw 0x");
1027 for (j
= 0; j
< REGISTER_RAW_SIZE (i
); j
++)
1028 printf_filtered ("%02x", (unsigned char)raw_buffer
[j
]);
1029 printf_filtered (")");
1032 /* FIXME! val_print probably can handle all of these cases now... */
1034 /* Else if virtual format is too long for printf,
1035 print in hex a byte at a time. */
1036 else if (REGISTER_VIRTUAL_SIZE (i
) > sizeof (long))
1039 printf_filtered ("0x");
1040 for (j
= 0; j
< REGISTER_VIRTUAL_SIZE (i
); j
++)
1041 printf_filtered ("%02x", (unsigned char)virtual_buffer
[j
]);
1043 /* Else print as integer in hex and in decimal. */
1046 val_print (REGISTER_VIRTUAL_TYPE (i
), raw_buffer
, 0,
1047 stdout
, 'x', 1, 0, Val_pretty_default
);
1048 printf_filtered ("\t");
1049 val_print (REGISTER_VIRTUAL_TYPE (i
), raw_buffer
, 0,
1050 stdout
, 0, 1, 0, Val_pretty_default
);
1053 /* The SPARC wants to print even-numbered float regs as doubles
1054 in addition to printing them as floats. */
1055 #ifdef PRINT_REGISTER_HOOK
1056 PRINT_REGISTER_HOOK (i
);
1059 printf_filtered ("\n");
1062 #endif /* no DO_REGISTERS_INFO. */
1065 registers_info (addr_exp
, fpregs
)
1072 if (!target_has_registers
)
1073 error ("The program has no registers now.");
1077 DO_REGISTERS_INFO(-1, fpregs
);
1083 if (addr_exp
[0] == '$')
1086 while (*end
!= '\0' && *end
!= ' ' && *end
!= '\t')
1088 for (regnum
= 0; regnum
< NUM_REGS
; regnum
++)
1089 if (!strncmp (addr_exp
, reg_names
[regnum
], end
- addr_exp
)
1090 && strlen (reg_names
[regnum
]) == end
- addr_exp
)
1092 if (*addr_exp
>= '0' && *addr_exp
<= '9')
1093 regnum
= atoi (addr_exp
); /* Take a number */
1094 if (regnum
>= NUM_REGS
) /* Bad name, or bad number */
1095 error ("%.*s: invalid register", end
- addr_exp
, addr_exp
);
1098 DO_REGISTERS_INFO(regnum
, fpregs
);
1101 while (*addr_exp
== ' ' || *addr_exp
== '\t')
1103 } while (*addr_exp
!= '\0');
1107 all_registers_info (addr_exp
, from_tty
)
1111 registers_info (addr_exp
, 1);
1115 nofp_registers_info (addr_exp
, from_tty
)
1119 registers_info (addr_exp
, 0);
1124 * Should save/restore the tty state since it might be that the
1125 * program to be debugged was started on this tty and it wants
1126 * the tty in some state other than what we want. If it's running
1127 * on another terminal or without a terminal, then saving and
1128 * restoring the tty state is a harmless no-op.
1129 * This only needs to be done if we are attaching to a process.
1134 takes a program started up outside of gdb and ``attaches'' to it.
1135 This stops it cold in its tracks and allows us to start debugging it.
1136 and wait for the trace-trap that results from attaching. */
1139 attach_command (args
, from_tty
)
1143 dont_repeat (); /* Not for the faint of heart */
1145 if (target_has_execution
)
1147 if (query ("A program is being debugged already. Kill it? "))
1150 error ("Not killed.");
1153 target_attach (args
, from_tty
);
1155 /* Set up the "saved terminal modes" of the inferior
1156 based on what modes we are starting it with. */
1157 target_terminal_init ();
1159 /* Install inferior's terminal modes. */
1160 target_terminal_inferior ();
1162 /* Set up execution context to know that we should return from
1163 wait_for_inferior as soon as the target reports a stop. */
1164 init_wait_for_inferior ();
1165 clear_proceed_status ();
1166 stop_soon_quietly
= 1;
1168 wait_for_inferior ();
1171 /* Add shared library symbols from the newly attached process, if any. */
1172 SOLIB_ADD ((char *)0, from_tty
, (struct target_ops
*)0);
1180 * takes a program previously attached to and detaches it.
1181 * The program resumes execution and will no longer stop
1182 * on signals, etc. We better not have left any breakpoints
1183 * in the program or it'll die when it hits one. For this
1184 * to work, it may be necessary for the process to have been
1185 * previously attached. It *might* work if the program was
1186 * started via the normal ptrace (PTRACE_TRACEME).
1190 detach_command (args
, from_tty
)
1194 dont_repeat (); /* Not for the faint of heart */
1195 target_detach (args
, from_tty
);
1200 float_info (addr_exp
, from_tty
)
1207 printf_filtered ("No floating point info available for this processor.\n");
1213 unset_command (args
, from_tty
)
1217 printf_filtered ("\"unset\" must be followed by the name of an unset subcommand.\n");
1218 help_list (unsetlist
, "unset ", -1, stdout
);
1222 _initialize_infcmd ()
1224 struct cmd_list_element
*c
;
1226 add_com ("tty", class_run
, tty_command
,
1227 "Set terminal for future runs of program being debugged.");
1230 (add_set_cmd ("args", class_run
, var_string_noescape
, (char *)&inferior_args
,
1232 "Set arguments to give program being debugged when it is started.\n\
1233 Follow this command with any number of args, to be passed to the program.",
1238 ("environment", no_class
, environment_info
,
1239 "The environment to give the program, or one variable's value.\n\
1240 With an argument VAR, prints the value of environment variable VAR to\n\
1241 give the program being debugged. With no arguments, prints the entire\n\
1242 environment to be given to the program.", &showlist
);
1243 c
->completer
= noop_completer
;
1245 add_prefix_cmd ("unset", no_class
, unset_command
,
1246 "Complement to certain \"set\" commands",
1247 &unsetlist
, "unset ", 0, &cmdlist
);
1249 c
= add_cmd ("environment", class_run
, unset_environment_command
,
1250 "Cancel environment variable VAR for the program.\n\
1251 This does not affect the program until the next \"run\" command.",
1253 c
->completer
= noop_completer
;
1255 c
= add_cmd ("environment", class_run
, set_environment_command
,
1256 "Set environment variable value to give the program.\n\
1257 Arguments are VAR VALUE where VAR is variable name and VALUE is value.\n\
1258 VALUES of environment variables are uninterpreted strings.\n\
1259 This does not affect the program until the next \"run\" command.",
1261 c
->completer
= noop_completer
;
1263 add_com ("path", class_files
, path_command
,
1264 "Add directory DIR(s) to beginning of search path for object files.\n\
1265 $cwd in the path means the current working directory.\n\
1266 This path is equivalent to the $PATH shell variable. It is a list of\n\
1267 directories, separated by colons. These directories are searched to find\n\
1268 fully linked executable files and separately compiled object files as needed.");
1270 c
= add_cmd ("paths", no_class
, path_info
,
1271 "Current search path for finding object files.\n\
1272 $cwd in the path means the current working directory.\n\
1273 This path is equivalent to the $PATH shell variable. It is a list of\n\
1274 directories, separated by colons. These directories are searched to find\n\
1275 fully linked executable files and separately compiled object files as needed.", &showlist
);
1276 c
->completer
= noop_completer
;
1278 add_com ("attach", class_run
, attach_command
,
1279 "Attach to a process or file outside of GDB.\n\
1280 This command attaches to another target, of the same type as your last\n\
1281 `target' command (`info files' will show your target stack).\n\
1282 The command may take as argument a process id or a device file.\n\
1283 For a process id, you must have permission to send the process a signal,\n\
1284 and it must have the same effective uid as the debugger.\n\
1285 When using \"attach\", you should use the \"file\" command to specify\n\
1286 the program running in the process, and to load its symbol table.");
1288 add_com ("detach", class_run
, detach_command
,
1289 "Detach a process or file previously attached.\n\
1290 If a process, it is no longer traced, and it continues its execution. If you\n\
1291 were debugging a file, the file is closed and gdb no longer accesses it.");
1293 add_com ("signal", class_run
, signal_command
,
1294 "Continue program giving it signal number SIGNUMBER.");
1296 add_com ("stepi", class_run
, stepi_command
,
1297 "Step one instruction exactly.\n\
1298 Argument N means do this N times (or till program stops for another reason).");
1299 add_com_alias ("si", "stepi", class_alias
, 0);
1301 add_com ("nexti", class_run
, nexti_command
,
1302 "Step one instruction, but proceed through subroutine calls.\n\
1303 Argument N means do this N times (or till program stops for another reason).");
1304 add_com_alias ("ni", "nexti", class_alias
, 0);
1306 add_com ("finish", class_run
, finish_command
,
1307 "Execute until selected stack frame returns.\n\
1308 Upon return, the value returned is printed and put in the value history.");
1310 add_com ("next", class_run
, next_command
,
1311 "Step program, proceeding through subroutine calls.\n\
1312 Like the \"step\" command as long as subroutine calls do not happen;\n\
1313 when they do, the call is treated as one instruction.\n\
1314 Argument N means do this N times (or till program stops for another reason).");
1315 add_com_alias ("n", "next", class_run
, 1);
1317 add_com ("step", class_run
, step_command
,
1318 "Step program until it reaches a different source line.\n\
1319 Argument N means do this N times (or till program stops for another reason).");
1320 add_com_alias ("s", "step", class_run
, 1);
1322 add_com ("until", class_run
, until_command
,
1323 "Execute until the program reaches a source line greater than the current\n\
1324 or a specified line or address or function (same args as break command).\n\
1325 Execution will also stop upon exit from the current stack frame.");
1326 add_com_alias ("u", "until", class_run
, 1);
1328 add_com ("jump", class_run
, jump_command
,
1329 "Continue program being debugged at specified line or address.\n\
1330 Give as argument either LINENUM or *ADDR, where ADDR is an expression\n\
1331 for an address to start at.");
1333 add_com ("continue", class_run
, continue_command
,
1334 "Continue program being debugged, after signal or breakpoint.\n\
1335 If proceeding from breakpoint, a number N may be used as an argument,\n\
1336 which means to set the ignore count of that breakpoint to N - 1 (so that\n\
1337 the breakpoint won't break until the Nth time it is reached).");
1338 add_com_alias ("c", "cont", class_run
, 1);
1339 add_com_alias ("fg", "cont", class_run
, 1);
1341 add_com ("run", class_run
, run_command
,
1342 "Start debugged program. You may specify arguments to give it.\n\
1343 Args may include \"*\", or \"[...]\"; they are expanded using \"sh\".\n\
1344 Input and output redirection with \">\", \"<\", or \">>\" are also allowed.\n\n\
1345 With no arguments, uses arguments last specified (with \"run\" or \"set args\").\n\
1346 To cancel previous arguments and run with no arguments,\n\
1347 use \"set args\" without arguments.");
1348 add_com_alias ("r", "run", class_run
, 1);
1350 add_info ("registers", nofp_registers_info
,
1351 "List of integer registers and their contents, for selected stack frame.\n\
1352 Register name as argument means describe only that register.");
1354 add_info ("all-registers", all_registers_info
,
1355 "List of all registers and their contents, for selected stack frame.\n\
1356 Register name as argument means describe only that register.");
1358 add_info ("program", program_info
,
1359 "Execution status of the program.");
1361 add_info ("float", float_info
,
1362 "Print the status of the floating point unit\n");
1364 inferior_args
= savestring ("", 1); /* Initially no args */
1365 inferior_environ
= make_environ ();
1366 init_environ (inferior_environ
);