1 /* Top level stuff for GDB, the GNU debugger.
2 Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996
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, Boston, MA 02111-1307, USA. */
23 #include "call-cmds.h"
28 #include "breakpoint.h"
30 #include "expression.h"
33 #include "terminal.h" /* For job_control. */
38 /* readline include files */
42 /* readline defines this. */
45 #include <sys/types.h>
50 #include "gdb_string.h"
54 #include <sys/param.h>
58 extern void initialize_utils
PARAMS ((void));
60 /* Prototypes for local functions */
62 static void dont_repeat_command
PARAMS ((char *, int));
64 static void source_cleanup_lines
PARAMS ((PTR
));
66 static void user_defined_command
PARAMS ((char *, int));
68 static void init_signals
PARAMS ((void));
71 static void stop_sig
PARAMS ((int));
74 static void disconnect
PARAMS ((int));
76 static char * line_completion_function
PARAMS ((char *, int, char *, int));
78 static char * readline_line_completion_function
PARAMS ((char *, int));
80 static void command_loop_marker
PARAMS ((int));
82 static void while_command
PARAMS ((char *, int));
84 static void if_command
PARAMS ((char *, int));
86 static struct command_line
*
87 build_command_line
PARAMS ((enum command_control_type
, char *));
89 static struct command_line
*
90 get_command_line
PARAMS ((enum command_control_type
, char *));
92 static void realloc_body_list
PARAMS ((struct command_line
*, int));
94 static enum misc_command_type read_next_line
PARAMS ((struct command_line
**));
96 static enum command_control_type
97 recurse_read_control_structure
PARAMS ((struct command_line
*));
99 static struct cleanup
* setup_user_args
PARAMS ((char *));
101 static char * locate_arg
PARAMS ((char *));
103 static char * insert_args
PARAMS ((char *));
105 static void arg_cleanup
PARAMS ((void));
107 static void init_main
PARAMS ((void));
109 static void init_cmd_lists
PARAMS ((void));
111 static void float_handler
PARAMS ((int));
113 static void init_signals
PARAMS ((void));
115 static void set_verbose
PARAMS ((char *, int, struct cmd_list_element
*));
117 #ifdef TARGET_BYTE_ORDER_SELECTABLE
119 static void set_endian
PARAMS ((char *, int));
121 static void set_endian_big
PARAMS ((char *, int));
123 static void set_endian_little
PARAMS ((char *, int));
125 static void set_endian_auto
PARAMS ((char *, int));
127 static void show_endian
PARAMS ((char *, int));
131 static void show_history
PARAMS ((char *, int));
133 static void set_history
PARAMS ((char *, int));
135 static void set_history_size_command
PARAMS ((char *, int,
136 struct cmd_list_element
*));
138 static void show_commands
PARAMS ((char *, int));
140 static void echo_command
PARAMS ((char *, int));
142 static void pwd_command
PARAMS ((char *, int));
144 static void show_version
PARAMS ((char *, int));
146 static void document_command
PARAMS ((char *, int));
148 static void define_command
PARAMS ((char *, int));
150 static void validate_comname
PARAMS ((char *));
152 static void help_command
PARAMS ((char *, int));
154 static void show_command
PARAMS ((char *, int));
156 static void info_command
PARAMS ((char *, int));
158 static void complete_command
PARAMS ((char *, int));
160 static void do_nothing
PARAMS ((int));
162 static int quit_cover
PARAMS ((char *));
164 static void disconnect
PARAMS ((int));
166 static void source_cleanup
PARAMS ((FILE *));
168 /* If this definition isn't overridden by the header files, assume
169 that isatty and fileno exist on this system. */
171 #define ISATTY(FP) (isatty (fileno (FP)))
174 /* Initialization file name for gdb. This is overridden in some configs. */
176 #ifndef GDBINIT_FILENAME
177 #define GDBINIT_FILENAME ".gdbinit"
179 char gdbinit
[] = GDBINIT_FILENAME
;
181 int inhibit_gdbinit
= 0;
183 /* If nonzero, and GDB has been configured to be able to use windows,
184 attempt to open them upon startup. */
188 /* Version number of GDB, as a string. */
190 extern char *version
;
192 /* Canonical host name as a string. */
194 extern char *host_name
;
196 /* Canonical target name as a string. */
198 extern char *target_name
;
200 extern char lang_frame_mismatch_warn
[]; /* language.c */
202 /* Flag for whether we want all the "from_tty" gubbish printed. */
204 int caution
= 1; /* Default is yes, sigh. */
206 /* Define all cmd_list_elements. */
208 /* Chain containing all defined commands. */
210 struct cmd_list_element
*cmdlist
;
212 /* Chain containing all defined info subcommands. */
214 struct cmd_list_element
*infolist
;
216 /* Chain containing all defined enable subcommands. */
218 struct cmd_list_element
*enablelist
;
220 /* Chain containing all defined disable subcommands. */
222 struct cmd_list_element
*disablelist
;
224 /* Chain containing all defined delete subcommands. */
226 struct cmd_list_element
*deletelist
;
228 /* Chain containing all defined "enable breakpoint" subcommands. */
230 struct cmd_list_element
*enablebreaklist
;
232 /* Chain containing all defined set subcommands */
234 struct cmd_list_element
*setlist
;
236 /* Chain containing all defined unset subcommands */
238 struct cmd_list_element
*unsetlist
;
240 /* Chain containing all defined show subcommands. */
242 struct cmd_list_element
*showlist
;
244 #ifdef TARGET_BYTE_ORDER_SELECTABLE
245 /* Chain containing the \"set endian\" commands. */
247 struct cmd_list_element
*endianlist
;
250 /* Chain containing all defined \"set history\". */
252 struct cmd_list_element
*sethistlist
;
254 /* Chain containing all defined \"show history\". */
256 struct cmd_list_element
*showhistlist
;
258 /* Chain containing all defined \"unset history\". */
260 struct cmd_list_element
*unsethistlist
;
262 /* Chain containing all defined maintenance subcommands. */
265 struct cmd_list_element
*maintenancelist
;
268 /* Chain containing all defined "maintenance info" subcommands. */
271 struct cmd_list_element
*maintenanceinfolist
;
274 /* Chain containing all defined "maintenance print" subcommands. */
277 struct cmd_list_element
*maintenanceprintlist
;
280 struct cmd_list_element
*setprintlist
;
282 struct cmd_list_element
*showprintlist
;
284 struct cmd_list_element
*setchecklist
;
286 struct cmd_list_element
*showchecklist
;
288 /* stdio stream that command input is being read from. Set to stdin normally.
289 Set by source_command to the file we are sourcing. Set to NULL if we are
290 executing a user-defined command or interacting via a GUI. */
294 /* Current working directory. */
296 char *current_directory
;
298 /* The directory name is actually stored here (usually). */
299 char gdb_dirbuf
[1024];
301 /* Function to call before reading a command, if nonzero.
302 The function receives two args: an input stream,
303 and a prompt string. */
305 void (*window_hook
) PARAMS ((FILE *, char *));
310 /* gdb prints this when reading a command interactively */
313 /* Buffer used for reading command lines, and the size
314 allocated for it so far. */
319 /* Nonzero if the current command is modified by "server ". This
320 affects things like recording into the command history, comamnds
321 repeating on RETURN, etc. This is so a user interface (emacs, GUI,
322 whatever) can issue its own commands and also send along commands
323 from the user, and have the user not notice that the user interface
324 is issuing commands too. */
327 /* Baud rate specified for talking to serial target systems. Default
328 is left as -1, so targets can choose their own defaults. */
329 /* FIXME: This means that "show remotebaud" and gr_files_info can print -1
330 or (unsigned int)-1. This is a Bad User Interface. */
334 /* Timeout limit for response from target. */
336 int remote_timeout
= 20; /* Set default to 20 */
338 /* Non-zero tells remote* modules to output debugging info. */
340 int remote_debug
= 0;
342 /* Level of control structure. */
343 static int control_level
;
345 /* Structure for arguments to user defined functions. */
346 #define MAXUSERARGS 10
349 struct user_args
*next
;
358 /* Signal to catch ^Z typed while reading a command: SIGTSTP or SIGCONT. */
362 #define STOP_SIGNAL SIGTSTP
363 static void stop_sig
PARAMS ((int));
367 /* Some System V have job control but not sigsetmask(). */
368 #if !defined (HAVE_SIGSETMASK)
370 #define HAVE_SIGSETMASK 1
372 #define HAVE_SIGSETMASK 0
376 #if 0 == (HAVE_SIGSETMASK)
377 #define sigsetmask(n)
380 /* Hooks for alternate command interfaces. */
382 /* Called after most modules have been initialized, but before taking users
385 void (*init_ui_hook
) PARAMS ((void));
387 /* Called instead of command_loop at top level. Can be invoked via
388 return_to_top_level. */
390 void (*command_loop_hook
) PARAMS ((void));
393 /* Called instead of fputs for all output. */
395 void (*fputs_unfiltered_hook
) PARAMS ((const char *linebuffer
, FILE *stream
));
397 /* Called when the target says something to the host, which may
398 want to appear in a different window. */
400 void (*target_output_hook
) PARAMS ((char *));
402 /* Called from print_frame_info to list the line we stopped in. */
404 void (*print_frame_info_listing_hook
) PARAMS ((struct symtab
*s
, int line
,
405 int stopline
, int noerror
));
406 /* Replaces most of query. */
408 int (*query_hook
) PARAMS ((const char *, va_list));
410 /* Called from gdb_flush to flush output. */
412 void (*flush_hook
) PARAMS ((FILE *stream
));
414 /* These three functions support getting lines of text from the user. They
415 are used in sequence. First readline_begin_hook is called with a text
416 string that might be (for example) a message for the user to type in a
417 sequence of commands to be executed at a breakpoint. If this function
418 calls back to a GUI, it might take this opportunity to pop up a text
419 interaction window with this message. Next, readline_hook is called
420 with a prompt that is emitted prior to collecting the user input.
421 It can be called multiple times. Finally, readline_end_hook is called
422 to notify the GUI that we are done with the interaction window and it
425 void (*readline_begin_hook
) PARAMS ((char *, ...));
426 char * (*readline_hook
) PARAMS ((char *));
427 void (*readline_end_hook
) PARAMS ((void));
429 /* Called as appropriate to notify the interface of the specified breakpoint
432 void (*create_breakpoint_hook
) PARAMS ((struct breakpoint
*bpt
));
433 void (*delete_breakpoint_hook
) PARAMS ((struct breakpoint
*bpt
));
434 void (*modify_breakpoint_hook
) PARAMS ((struct breakpoint
*bpt
));
436 /* Called during long calculations to allow GUI to repair window damage, and to
437 check for stop buttons, etc... */
439 void (*interactive_hook
) PARAMS ((void));
441 /* Called when the registers have changed, as a hint to a GUI
442 to minimize window update. */
444 void (*registers_changed_hook
) PARAMS ((void));
446 /* Called when going to wait for the target. Usually allows the GUI to run
447 while waiting for target events. */
449 int (*target_wait_hook
) PARAMS ((int pid
, struct target_waitstatus
*status
));
451 /* Used by UI as a wrapper around command execution. May do various things
452 like enabling/disabling buttons, etc... */
454 void (*call_command_hook
) PARAMS ((struct cmd_list_element
*c
, char *cmd
,
458 /* Takes control from error (). Typically used to prevent longjmps out of the
459 middle of the GUI. Usually used in conjunction with a catch routine. */
461 NORETURN
void (*error_hook
) PARAMS ((void)) ATTR_NORETURN
;
464 /* Where to go for return_to_top_level (RETURN_ERROR). */
465 jmp_buf error_return
;
466 /* Where to go for return_to_top_level (RETURN_QUIT). */
469 /* Return for reason REASON. This generally gets back to the command
470 loop, but can be caught via catch_errors. */
473 return_to_top_level (reason
)
474 enum return_reason reason
;
479 /* Perhaps it would be cleaner to do this via the cleanup chain (not sure
480 I can think of a reason why that is vital, though). */
481 bpstat_clear_actions(stop_bpstat
); /* Clear queued breakpoint commands */
483 disable_current_display ();
484 do_cleanups (ALL_CLEANUPS
);
486 if (annotation_level
> 1)
497 (NORETURN
void) longjmp
498 (reason
== RETURN_ERROR
? error_return
: quit_return
, 1);
501 /* Call FUNC with arg ARGS, catching any errors. If there is no
502 error, return the value returned by FUNC. If there is an error,
503 print ERRSTRING, print the specific error message, then return
506 Must not be called with immediate_quit in effect (bad things might
507 happen, say we got a signal in the middle of a memcpy to quit_return).
508 This is an OK restriction; with very few exceptions immediate_quit can
509 be replaced by judicious use of QUIT.
511 MASK specifies what to catch; it is normally set to
512 RETURN_MASK_ALL, if for no other reason than that the code which
513 calls catch_errors might not be set up to deal with a quit which
514 isn't caught. But if the code can deal with it, it generally
515 should be RETURN_MASK_ERROR, unless for some reason it is more
516 useful to abort only the portion of the operation inside the
517 catch_errors. Note that quit should return to the command line
518 fairly quickly, even if some further processing is being done. */
521 catch_errors (func
, args
, errstring
, mask
)
522 int (*func
) PARAMS ((char *));
531 struct cleanup
*saved_cleanup_chain
;
532 char *saved_error_pre_print
;
533 char *saved_quit_pre_print
;
535 saved_cleanup_chain
= save_cleanups ();
536 saved_error_pre_print
= error_pre_print
;
537 saved_quit_pre_print
= quit_pre_print
;
539 if (mask
& RETURN_MASK_ERROR
)
541 memcpy ((char *)saved_error
, (char *)error_return
, sizeof (jmp_buf));
542 error_pre_print
= errstring
;
544 if (mask
& RETURN_MASK_QUIT
)
546 memcpy (saved_quit
, quit_return
, sizeof (jmp_buf));
547 quit_pre_print
= errstring
;
550 if (setjmp (tmp_jmp
) == 0)
552 if (mask
& RETURN_MASK_ERROR
)
553 memcpy (error_return
, tmp_jmp
, sizeof (jmp_buf));
554 if (mask
& RETURN_MASK_QUIT
)
555 memcpy (quit_return
, tmp_jmp
, sizeof (jmp_buf));
556 val
= (*func
) (args
);
561 restore_cleanups (saved_cleanup_chain
);
563 if (mask
& RETURN_MASK_ERROR
)
565 memcpy (error_return
, saved_error
, sizeof (jmp_buf));
566 error_pre_print
= saved_error_pre_print
;
568 if (mask
& RETURN_MASK_QUIT
)
570 memcpy (quit_return
, saved_quit
, sizeof (jmp_buf));
571 quit_pre_print
= saved_quit_pre_print
;
576 /* Handler for SIGHUP. */
582 catch_errors (quit_cover
, NULL
,
583 "Could not kill the program being debugged", RETURN_MASK_ALL
);
584 signal (SIGHUP
, SIG_DFL
);
585 kill (getpid (), SIGHUP
);
588 /* Just a little helper function for disconnect(). */
594 caution
= 0; /* Throw caution to the wind -- we're exiting.
595 This prevents asking the user dumb questions. */
596 quit_command((char *)0, 0);
600 /* Line number we are currently in in a file which is being sourced. */
601 static int source_line_number
;
603 /* Name of the file we are sourcing. */
604 static char *source_file_name
;
606 /* Buffer containing the error_pre_print used by the source stuff.
608 static char *source_error
;
609 static int source_error_allocated
;
611 /* Something to glom on to the start of error_pre_print if source_file_name
613 static char *source_pre_error
;
615 /* Clean up on error during a "source" command (or execution of a
616 user-defined command). */
619 source_cleanup (stream
)
622 /* Restore the previous input stream. */
626 /* Read commands from STREAM. */
628 read_command_file (stream
)
631 struct cleanup
*cleanups
;
633 cleanups
= make_cleanup (source_cleanup
, instream
);
636 do_cleanups (cleanups
);
639 extern void init_proc
PARAMS ((void));
641 void (*pre_init_ui_hook
) PARAMS ((void));
646 if (pre_init_ui_hook
)
649 /* Run the init function of each source file */
651 getcwd (gdb_dirbuf
, sizeof (gdb_dirbuf
));
652 current_directory
= gdb_dirbuf
;
654 init_cmd_lists (); /* This needs to be done first */
655 initialize_targets (); /* Setup target_terminal macros for utils.c */
656 initialize_utils (); /* Make errors and warnings possible */
657 initialize_all_files ();
658 init_main (); /* But that omits this file! Do it now */
663 /* We need a default language for parsing expressions, so simple things like
664 "set width 0" won't fail if no language is explicitly set in a config file
665 or implicitly set by reading an executable during startup. */
666 set_language (language_c
);
667 expected_language
= current_language
; /* don't warn about the change. */
673 /* Allocate, initialize a new command line structure for one of the
674 control commands (if/while). */
676 static struct command_line
*
677 build_command_line (type
, args
)
678 enum command_control_type type
;
681 struct command_line
*cmd
;
684 error ("if/while commands require arguments.\n");
686 cmd
= (struct command_line
*)xmalloc (sizeof (struct command_line
));
688 cmd
->control_type
= type
;
692 = (struct command_line
**)xmalloc (sizeof (struct command_line
*)
694 memset (cmd
->body_list
, 0, sizeof (struct command_line
*) * cmd
->body_count
);
695 cmd
->line
= savestring (args
, strlen (args
));
699 /* Build and return a new command structure for the control commands
700 such as "if" and "while". */
702 static struct command_line
*
703 get_command_line (type
, arg
)
704 enum command_control_type type
;
707 struct command_line
*cmd
;
708 struct cleanup
*old_chain
= NULL
;
710 /* Allocate and build a new command line structure. */
711 cmd
= build_command_line (type
, arg
);
713 old_chain
= make_cleanup (free_command_lines
, &cmd
);
715 /* Read in the body of this command. */
716 if (recurse_read_control_structure (cmd
) == invalid_control
)
718 warning ("error reading in control structure\n");
719 do_cleanups (old_chain
);
723 discard_cleanups (old_chain
);
727 /* Recursively print a command (including full control structures). */
729 print_command_line (cmd
, depth
)
730 struct command_line
*cmd
;
737 for (i
= 0; i
< depth
; i
++)
738 fputs_filtered (" ", gdb_stdout
);
741 /* A simple command, print it and return. */
742 if (cmd
->control_type
== simple_control
)
744 fputs_filtered (cmd
->line
, gdb_stdout
);
745 fputs_filtered ("\n", gdb_stdout
);
749 /* loop_continue to jump to the start of a while loop, print it
751 if (cmd
->control_type
== continue_control
)
753 fputs_filtered ("loop_continue\n", gdb_stdout
);
757 /* loop_break to break out of a while loop, print it and return. */
758 if (cmd
->control_type
== break_control
)
760 fputs_filtered ("loop_break\n", gdb_stdout
);
764 /* A while command. Recursively print its subcommands before returning. */
765 if (cmd
->control_type
== while_control
)
767 struct command_line
*list
;
768 fputs_filtered ("while ", gdb_stdout
);
769 fputs_filtered (cmd
->line
, gdb_stdout
);
770 fputs_filtered ("\n", gdb_stdout
);
771 list
= *cmd
->body_list
;
774 print_command_line (list
, depth
+ 1);
779 /* An if command. Recursively print both arms before returning. */
780 if (cmd
->control_type
== if_control
)
782 fputs_filtered ("if ", gdb_stdout
);
783 fputs_filtered (cmd
->line
, gdb_stdout
);
784 fputs_filtered ("\n", gdb_stdout
);
786 print_command_line (cmd
->body_list
[0], depth
+ 1);
788 /* Show the false arm if it exists. */
789 if (cmd
->body_count
== 2)
793 for (i
= 0; i
< depth
; i
++)
794 fputs_filtered (" ", gdb_stdout
);
796 fputs_filtered ("else\n", gdb_stdout
);
797 print_command_line (cmd
->body_list
[1], depth
+ 1);
801 for (i
= 0; i
< depth
; i
++)
802 fputs_filtered (" ", gdb_stdout
);
804 fputs_filtered ("end\n", gdb_stdout
);
808 /* Execute the command in CMD. */
810 enum command_control_type
811 execute_control_command (cmd
)
812 struct command_line
*cmd
;
814 struct expression
*expr
;
815 struct command_line
*current
;
816 struct cleanup
*old_chain
= 0;
819 enum command_control_type ret
;
822 switch (cmd
->control_type
)
825 /* A simple command, execute it and return. */
826 new_line
= insert_args (cmd
->line
);
828 return invalid_control
;
829 old_chain
= make_cleanup (free_current_contents
, &new_line
);
830 execute_command (new_line
, 0);
831 ret
= cmd
->control_type
;
834 case continue_control
:
836 /* Return for "continue", and "break" so we can either
837 continue the loop at the top, or break out. */
838 ret
= cmd
->control_type
;
843 /* Parse the loop control expression for the while statement. */
844 new_line
= insert_args (cmd
->line
);
846 return invalid_control
;
847 old_chain
= make_cleanup (free_current_contents
, &new_line
);
848 expr
= parse_expression (new_line
);
849 make_cleanup (free_current_contents
, &expr
);
851 ret
= simple_control
;
854 /* Keep iterating so long as the expression is true. */
859 /* Evaluate the expression. */
860 val
= evaluate_expression (expr
);
862 /* If the value is false, then break out of the loop. */
863 if (!value_true (val
))
866 /* Execute the body of the while statement. */
867 current
= *cmd
->body_list
;
870 ret
= execute_control_command (current
);
872 /* If we got an error, or a "break" command, then stop
874 if (ret
== invalid_control
|| ret
== break_control
)
880 /* If we got a "continue" command, then restart the loop
882 if (ret
== continue_control
)
885 /* Get the next statement. */
886 current
= current
->next
;
890 /* Reset RET so that we don't recurse the break all the way down. */
891 if (ret
== break_control
)
892 ret
= simple_control
;
899 new_line
= insert_args (cmd
->line
);
901 return invalid_control
;
902 old_chain
= make_cleanup (free_current_contents
, &new_line
);
903 /* Parse the conditional for the if statement. */
904 expr
= parse_expression (new_line
);
905 make_cleanup (free_current_contents
, &expr
);
908 ret
= simple_control
;
910 /* Evaluate the conditional. */
911 val
= evaluate_expression (expr
);
913 /* Choose which arm to take commands from based on the value of the
914 conditional expression. */
915 if (value_true (val
))
916 current
= *cmd
->body_list
;
917 else if (cmd
->body_count
== 2)
918 current
= *(cmd
->body_list
+ 1);
920 /* Execute commands in the given arm. */
923 ret
= execute_control_command (current
);
925 /* If we got an error, get out. */
926 if (ret
!= simple_control
)
929 /* Get the next statement in the body. */
930 current
= current
->next
;
937 warning ("Invalid control type in command structure.");
938 return invalid_control
;
942 do_cleanups (old_chain
);
947 /* "while" command support. Executes a body of statements while the
948 loop condition is nonzero. */
951 while_command (arg
, from_tty
)
955 struct command_line
*command
= NULL
;
958 command
= get_command_line (while_control
, arg
);
963 execute_control_command (command
);
964 free_command_lines (&command
);
967 /* "if" command support. Execute either the true or false arm depending
968 on the value of the if conditional. */
971 if_command (arg
, from_tty
)
975 struct command_line
*command
= NULL
;
978 command
= get_command_line (if_control
, arg
);
983 execute_control_command (command
);
984 free_command_lines (&command
);
991 struct user_args
*oargs
= user_args
;
993 fatal ("Internal error, arg_cleanup called with no user args.\n");
995 user_args
= user_args
->next
;
999 /* Bind the incomming arguments for a user defined command to
1000 $arg0, $arg1 ... $argMAXUSERARGS. */
1002 static struct cleanup
*
1006 struct user_args
*args
;
1007 struct cleanup
*old_chain
;
1008 unsigned int arg_count
= 0;
1010 args
= (struct user_args
*)xmalloc (sizeof (struct user_args
));
1011 memset (args
, 0, sizeof (struct user_args
));
1013 args
->next
= user_args
;
1016 old_chain
= make_cleanup (arg_cleanup
, 0);
1025 if (arg_count
>= MAXUSERARGS
)
1027 error ("user defined function may only have %d arguments.\n",
1032 /* Strip whitespace. */
1033 while (*p
== ' ' || *p
== '\t')
1036 /* P now points to an argument. */
1038 user_args
->a
[arg_count
].arg
= p
;
1040 /* Get to the end of this argument. */
1041 while (*p
&& *p
!= ' ' && *p
!= '\t')
1044 user_args
->a
[arg_count
].len
= p
- start_arg
;
1051 /* Given character string P, return a point to the first argument ($arg),
1052 or NULL if P contains no arguments. */
1058 while ((p
= strchr (p
, '$')))
1060 if (strncmp (p
, "$arg", 4) == 0 && isdigit (p
[4]))
1067 /* Insert the user defined arguments stored in user_arg into the $arg
1068 arguments found in line, with the updated copy being placed into nline. */
1074 char *p
, *save_line
, *new_line
;
1077 /* First we need to know how much memory to allocate for the new line. */
1080 while ((p
= locate_arg (line
)))
1085 if (i
>= user_args
->count
)
1087 error ("Missing argument %d in user function.\n", i
);
1090 len
+= user_args
->a
[i
].len
;
1094 /* Don't forget the tail. */
1095 len
+= strlen (line
);
1097 /* Allocate space for the new line and fill it in. */
1098 new_line
= (char *)xmalloc (len
+ 1);
1099 if (new_line
== NULL
)
1102 /* Restore pointer to beginning of old line. */
1105 /* Save pointer to beginning of new line. */
1106 save_line
= new_line
;
1108 while ((p
= locate_arg (line
)))
1112 memcpy (new_line
, line
, p
- line
);
1113 new_line
+= p
- line
;
1116 len
= user_args
->a
[i
].len
;
1119 memcpy (new_line
, user_args
->a
[i
].arg
, len
);
1124 /* Don't forget the tail. */
1125 strcpy (new_line
, line
);
1127 /* Return a pointer to the beginning of the new line. */
1132 execute_user_command (c
, args
)
1133 struct cmd_list_element
*c
;
1136 register struct command_line
*cmdlines
;
1137 struct cleanup
*old_chain
;
1138 enum command_control_type ret
;
1140 old_chain
= setup_user_args (args
);
1142 cmdlines
= c
->user_commands
;
1147 /* Set the instream to 0, indicating execution of a
1148 user-defined function. */
1149 old_chain
= make_cleanup (source_cleanup
, instream
);
1150 instream
= (FILE *) 0;
1153 ret
= execute_control_command (cmdlines
);
1154 if (ret
!= simple_control
&& ret
!= break_control
)
1156 warning ("Error in control structure.\n");
1159 cmdlines
= cmdlines
->next
;
1161 do_cleanups (old_chain
);
1164 /* Execute the line P as a command.
1165 Pass FROM_TTY as second argument to the defining function. */
1168 execute_command (p
, from_tty
)
1172 register struct cmd_list_element
*c
;
1173 register enum language flang
;
1174 static int warned
= 0;
1175 /* FIXME: These should really be in an appropriate header file */
1176 extern FILE *serial_logfp
;
1177 extern void serial_log_command
PARAMS ((const char *));
1181 /* This can happen when command_line_input hits end of file. */
1185 if (serial_logfp
!= NULL
)
1186 serial_log_command (p
);
1188 while (*p
== ' ' || *p
== '\t') p
++;
1193 c
= lookup_cmd (&p
, cmdlist
, "", 0, 1);
1194 /* Pass null arg rather than an empty one. */
1197 /* Clear off trailing whitespace, except for set and complete command. */
1198 if (arg
&& c
->type
!= set_cmd
&& c
->function
.cfunc
!= complete_command
)
1200 p
= arg
+ strlen (arg
) - 1;
1201 while (p
>= arg
&& (*p
== ' ' || *p
== '\t'))
1206 /* If this command has been hooked, run the hook first. */
1208 execute_user_command (c
->hook
, (char *)0);
1210 if (c
->class == class_user
)
1211 execute_user_command (c
, arg
);
1212 else if (c
->type
== set_cmd
|| c
->type
== show_cmd
)
1213 do_setshow_command (arg
, from_tty
& caution
, c
);
1214 else if (c
->function
.cfunc
== NO_FUNCTION
)
1215 error ("That is not a command, just a help topic.");
1216 else if (call_command_hook
)
1217 call_command_hook (c
, arg
, from_tty
& caution
);
1219 (*c
->function
.cfunc
) (arg
, from_tty
& caution
);
1222 /* Tell the user if the language has changed (except first time). */
1223 if (current_language
!= expected_language
)
1225 if (language_mode
== language_mode_auto
) {
1226 language_info (1); /* Print what changed. */
1231 /* Warn the user if the working language does not match the
1232 language of the current frame. Only warn the user if we are
1233 actually running the program, i.e. there is a stack. */
1234 /* FIXME: This should be cacheing the frame and only running when
1235 the frame changes. */
1237 if (target_has_stack
)
1239 flang
= get_frame_language ();
1241 && flang
!= language_unknown
1242 && flang
!= current_language
->la_language
)
1244 printf_filtered ("%s\n", lang_frame_mismatch_warn
);
1252 command_loop_marker (foo
)
1257 /* Read commands from `instream' and execute them
1258 until end of file or error reading instream. */
1263 struct cleanup
*old_chain
;
1265 int stdin_is_tty
= ISATTY (stdin
);
1266 long time_at_cmd_start
;
1268 long space_at_cmd_start
;
1270 extern int display_time
;
1271 extern int display_space
;
1273 while (instream
&& !feof (instream
))
1275 if (window_hook
&& instream
== stdin
)
1276 (*window_hook
) (instream
, prompt
);
1279 if (instream
== stdin
&& stdin_is_tty
)
1280 reinitialize_more_filter ();
1281 old_chain
= make_cleanup (command_loop_marker
, 0);
1282 command
= command_line_input (instream
== stdin
? prompt
: (char *) NULL
,
1283 instream
== stdin
, "prompt");
1287 time_at_cmd_start
= get_run_time ();
1292 extern char **environ
;
1293 char *lim
= (char *) sbrk (0);
1295 space_at_cmd_start
= (long) (lim
- (char *) &environ
);
1299 execute_command (command
, instream
== stdin
);
1300 /* Do any commands attached to breakpoint we stopped at. */
1301 bpstat_do_actions (&stop_bpstat
);
1302 do_cleanups (old_chain
);
1306 long cmd_time
= get_run_time () - time_at_cmd_start
;
1308 printf_unfiltered ("Command execution time: %ld.%06ld\n",
1309 cmd_time
/ 1000000, cmd_time
% 1000000);
1315 extern char **environ
;
1316 char *lim
= (char *) sbrk (0);
1317 long space_now
= lim
- (char *) &environ
;
1318 long space_diff
= space_now
- space_at_cmd_start
;
1320 printf_unfiltered ("Space used: %ld (%c%ld for this command)\n",
1322 (space_diff
>= 0 ? '+' : '-'),
1329 /* Commands call this if they do not want to be repeated by null lines. */
1337 /* If we aren't reading from standard input, we are saving the last
1338 thing read from stdin in line and don't want to delete it. Null lines
1339 won't repeat here in any case. */
1340 if (instream
== stdin
)
1344 /* Read a line from the stream "instream" without command line editing.
1346 It prints PRROMPT once at the start.
1347 Action is compatible with "readline", e.g. space for the result is
1348 malloc'd and should be freed by the caller.
1350 A NULL return means end of file. */
1352 gdb_readline (prrompt
)
1357 int input_index
= 0;
1358 int result_size
= 80;
1362 /* Don't use a _filtered function here. It causes the assumed
1363 character position to be off, since the newline we read from
1364 the user is not accounted for. */
1365 fputs_unfiltered (prrompt
, gdb_stdout
);
1367 /* Move to a new line so the entered line doesn't have a prompt
1368 on the front of it. */
1369 fputs_unfiltered ("\n", gdb_stdout
);
1371 gdb_flush (gdb_stdout
);
1374 result
= (char *) xmalloc (result_size
);
1378 /* Read from stdin if we are executing a user defined command.
1379 This is the right thing for prompt_for_continue, at least. */
1380 c
= fgetc (instream
? instream
: stdin
);
1384 if (input_index
> 0)
1385 /* The last line does not end with a newline. Return it, and
1386 if we are called again fgetc will still return EOF and
1387 we'll return NULL then. */
1396 result
[input_index
++] = c
;
1397 while (input_index
>= result_size
)
1400 result
= (char *) xrealloc (result
, result_size
);
1404 result
[input_index
++] = '\0';
1408 /* Variables which control command line editing and history
1409 substitution. These variables are given default values at the end
1411 static int command_editing_p
;
1412 static int history_expansion_p
;
1413 static int write_history_p
;
1414 static int history_size
;
1415 static char *history_filename
;
1417 /* readline uses the word breaks for two things:
1418 (1) In figuring out where to point the TEXT parameter to the
1419 rl_completion_entry_function. Since we don't use TEXT for much,
1420 it doesn't matter a lot what the word breaks are for this purpose, but
1421 it does affect how much stuff M-? lists.
1422 (2) If one of the matches contains a word break character, readline
1423 will quote it. That's why we switch between
1424 gdb_completer_word_break_characters and
1425 gdb_completer_command_word_break_characters. I'm not sure when
1426 we need this behavior (perhaps for funky characters in C++ symbols?). */
1428 /* Variables which are necessary for fancy command line editing. */
1429 char *gdb_completer_word_break_characters
=
1430 " \t\n!@#$%^&*()+=|~`}{[]\"';:?/>.<,-";
1432 /* When completing on command names, we remove '-' from the list of
1433 word break characters, since we use it in command names. If the
1434 readline library sees one in any of the current completion strings,
1435 it thinks that the string needs to be quoted and automatically supplies
1437 char *gdb_completer_command_word_break_characters
=
1438 " \t\n!@#$%^&*()+=|~`}{[]\"';:?/>.<,";
1440 /* Characters that can be used to quote completion strings. Note that we
1441 can't include '"' because the gdb C parser treats such quoted sequences
1443 char *gdb_completer_quote_characters
=
1446 /* Functions that are used as part of the fancy command line editing. */
1448 /* This can be used for functions which don't want to complete on symbols
1449 but don't want to complete on anything else either. */
1452 noop_completer (text
, prefix
)
1459 /* Complete on filenames. */
1461 filename_completer (text
, word
)
1465 /* From readline. */
1466 extern char *filename_completion_function ();
1467 int subsequent_name
;
1469 int return_val_used
;
1470 int return_val_alloced
;
1472 return_val_used
= 0;
1473 /* Small for testing. */
1474 return_val_alloced
= 1;
1475 return_val
= (char **) xmalloc (return_val_alloced
* sizeof (char *));
1477 subsequent_name
= 0;
1481 p
= filename_completion_function (text
, subsequent_name
);
1482 if (return_val_used
>= return_val_alloced
)
1484 return_val_alloced
*= 2;
1486 (char **) xrealloc (return_val
,
1487 return_val_alloced
* sizeof (char *));
1491 return_val
[return_val_used
++] = p
;
1494 /* Like emacs, don't complete on old versions. Especially useful
1495 in the "source" command. */
1496 if (p
[strlen (p
) - 1] == '~')
1502 /* Return exactly p. */
1503 return_val
[return_val_used
++] = p
;
1504 else if (word
> text
)
1506 /* Return some portion of p. */
1507 q
= xmalloc (strlen (p
) + 5);
1508 strcpy (q
, p
+ (word
- text
));
1509 return_val
[return_val_used
++] = q
;
1514 /* Return some of TEXT plus p. */
1515 q
= xmalloc (strlen (p
) + (text
- word
) + 5);
1516 strncpy (q
, word
, text
- word
);
1517 q
[text
- word
] = '\0';
1519 return_val
[return_val_used
++] = q
;
1523 subsequent_name
= 1;
1526 /* There is no way to do this just long enough to affect quote inserting
1527 without also affecting the next completion. This should be fixed in
1529 /* Insure that readline does the right thing
1530 with respect to inserting quotes. */
1531 rl_completer_word_break_characters
= "";
1536 /* Here are some useful test cases for completion. FIXME: These should
1537 be put in the test suite. They should be tested with both M-? and TAB.
1539 "show output-" "radix"
1540 "show output" "-radix"
1541 "p" ambiguous (commands starting with p--path, print, printf, etc.)
1542 "p " ambiguous (all symbols)
1543 "info t foo" no completions
1544 "info t " no completions
1545 "info t" ambiguous ("info target", "info terminal", etc.)
1546 "info ajksdlfk" no completions
1547 "info ajksdlfk " no completions
1549 "info " ambiguous (all info commands)
1550 "p \"a" no completions (string constant)
1551 "p 'a" ambiguous (all symbols starting with a)
1552 "p b-a" ambiguous (all symbols starting with a)
1553 "p b-" ambiguous (all symbols)
1554 "file Make" "file" (word break hard to screw up here)
1555 "file ../gdb.stabs/we" "ird" (needs to not break word at slash)
1558 /* Generate completions one by one for the completer. Each time we are
1559 called return another potential completion to the caller.
1560 line_completion just completes on commands or passes the buck to the
1561 command's completer function, the stuff specific to symbol completion
1562 is in make_symbol_completion_list.
1564 TEXT is the caller's idea of the "word" we are looking at.
1566 MATCHES is the number of matches that have currently been collected from
1567 calling this completion function. When zero, then we need to initialize,
1568 otherwise the initialization has already taken place and we can just
1569 return the next potential completion string.
1571 LINE_BUFFER is available to be looked at; it contains the entire text
1572 of the line. POINT is the offset in that line of the cursor. You
1573 should pretend that the line ends at POINT.
1575 Returns NULL if there are no more completions, else a pointer to a string
1576 which is a possible completion, it is the caller's responsibility to
1580 line_completion_function (text
, matches
, line_buffer
, point
)
1586 static char **list
= (char **)NULL
; /* Cache of completions */
1587 static int index
; /* Next cached completion */
1588 char *output
= NULL
;
1589 char *tmp_command
, *p
;
1590 /* Pointer within tmp_command which corresponds to text. */
1592 struct cmd_list_element
*c
, *result_list
;
1596 /* The caller is beginning to accumulate a new set of completions, so
1597 we need to find all of them now, and cache them for returning one at
1598 a time on future calls. */
1602 /* Free the storage used by LIST, but not by the strings inside.
1603 This is because rl_complete_internal () frees the strings. */
1609 /* Choose the default set of word break characters to break completions.
1610 If we later find out that we are doing completions on command strings
1611 (as opposed to strings supplied by the individual command completer
1612 functions, which can be any string) then we will switch to the
1613 special word break set for command strings, which leaves out the
1614 '-' character used in some commands. */
1616 rl_completer_word_break_characters
=
1617 gdb_completer_word_break_characters
;
1619 /* Decide whether to complete on a list of gdb commands or on symbols. */
1620 tmp_command
= (char *) alloca (point
+ 1);
1623 strncpy (tmp_command
, line_buffer
, point
);
1624 tmp_command
[point
] = '\0';
1625 /* Since text always contains some number of characters leading up
1626 to point, we can find the equivalent position in tmp_command
1627 by subtracting that many characters from the end of tmp_command. */
1628 word
= tmp_command
+ point
- strlen (text
);
1632 /* An empty line we want to consider ambiguous; that is, it
1633 could be any command. */
1634 c
= (struct cmd_list_element
*) -1;
1639 c
= lookup_cmd_1 (&p
, cmdlist
, &result_list
, 1);
1642 /* Move p up to the next interesting thing. */
1643 while (*p
== ' ' || *p
== '\t')
1650 /* It is an unrecognized command. So there are no
1651 possible completions. */
1654 else if (c
== (struct cmd_list_element
*) -1)
1658 /* lookup_cmd_1 advances p up to the first ambiguous thing, but
1659 doesn't advance over that thing itself. Do so now. */
1661 while (*q
&& (isalnum (*q
) || *q
== '-' || *q
== '_'))
1663 if (q
!= tmp_command
+ point
)
1665 /* There is something beyond the ambiguous
1666 command, so there are no possible completions. For
1667 example, "info t " or "info t foo" does not complete
1668 to anything, because "info t" can be "info target" or
1674 /* We're trying to complete on the command which was ambiguous.
1675 This we can deal with. */
1678 list
= complete_on_cmdlist (*result_list
->prefixlist
, p
,
1683 list
= complete_on_cmdlist (cmdlist
, p
, word
);
1685 /* Insure that readline does the right thing with respect to
1686 inserting quotes. */
1687 rl_completer_word_break_characters
=
1688 gdb_completer_command_word_break_characters
;
1693 /* We've recognized a full command. */
1695 if (p
== tmp_command
+ point
)
1697 /* There is no non-whitespace in the line beyond the command. */
1699 if (p
[-1] == ' ' || p
[-1] == '\t')
1701 /* The command is followed by whitespace; we need to complete
1702 on whatever comes after command. */
1705 /* It is a prefix command; what comes after it is
1706 a subcommand (e.g. "info "). */
1707 list
= complete_on_cmdlist (*c
->prefixlist
, p
, word
);
1709 /* Insure that readline does the right thing
1710 with respect to inserting quotes. */
1711 rl_completer_word_break_characters
=
1712 gdb_completer_command_word_break_characters
;
1716 list
= complete_on_enum (c
->enums
, p
, word
);
1717 rl_completer_word_break_characters
=
1718 gdb_completer_command_word_break_characters
;
1722 /* It is a normal command; what comes after it is
1723 completed by the command's completer function. */
1724 list
= (*c
->completer
) (p
, word
);
1729 /* The command is not followed by whitespace; we need to
1730 complete on the command itself. e.g. "p" which is a
1731 command itself but also can complete to "print", "ptype"
1735 /* Find the command we are completing on. */
1737 while (q
> tmp_command
)
1739 if (isalnum (q
[-1]) || q
[-1] == '-' || q
[-1] == '_')
1745 list
= complete_on_cmdlist (result_list
, q
, word
);
1747 /* Insure that readline does the right thing
1748 with respect to inserting quotes. */
1749 rl_completer_word_break_characters
=
1750 gdb_completer_command_word_break_characters
;
1755 /* There is non-whitespace beyond the command. */
1757 if (c
->prefixlist
&& !c
->allow_unknown
)
1759 /* It is an unrecognized subcommand of a prefix command,
1760 e.g. "info adsfkdj". */
1765 list
= complete_on_enum (c
->enums
, p
, word
);
1769 /* It is a normal command. */
1770 list
= (*c
->completer
) (p
, word
);
1776 /* If we found a list of potential completions during initialization then
1777 dole them out one at a time. The vector of completions is NULL
1778 terminated, so after returning the last one, return NULL (and continue
1779 to do so) each time we are called after that, until a new list is
1784 output
= list
[index
];
1792 /* Can't do this because readline hasn't yet checked the word breaks
1793 for figuring out whether to insert a quote. */
1795 /* Make sure the word break characters are set back to normal for the
1796 next time that readline tries to complete something. */
1797 rl_completer_word_break_characters
=
1798 gdb_completer_word_break_characters
;
1804 /* Line completion interface function for readline. */
1807 readline_line_completion_function (text
, matches
)
1811 return line_completion_function (text
, matches
, rl_line_buffer
, rl_point
);
1814 /* Skip over a possibly quoted word (as defined by the quote characters
1815 and word break characters the completer uses). Returns pointer to the
1816 location after the "word". */
1822 char quote_char
= '\0';
1825 for (scan
= str
; *scan
!= '\0'; scan
++)
1827 if (quote_char
!= '\0')
1829 /* Ignore everything until the matching close quote char */
1830 if (*scan
== quote_char
)
1832 /* Found matching close quote. */
1837 else if (strchr (gdb_completer_quote_characters
, *scan
))
1839 /* Found start of a quoted string. */
1842 else if (strchr (gdb_completer_word_break_characters
, *scan
))
1856 #if STOP_SIGNAL == SIGTSTP
1857 signal (SIGTSTP
, SIG_DFL
);
1859 kill (getpid (), SIGTSTP
);
1860 signal (SIGTSTP
, stop_sig
);
1862 signal (STOP_SIGNAL
, stop_sig
);
1864 printf_unfiltered ("%s", prompt
);
1865 gdb_flush (gdb_stdout
);
1867 /* Forget about any previous command -- null line now will do nothing. */
1870 #endif /* STOP_SIGNAL */
1872 /* Initialize signal handlers. */
1882 signal (SIGINT
, request_quit
);
1884 /* If SIGTRAP was set to SIG_IGN, then the SIG_IGN will get passed
1885 to the inferior and breakpoints will be ignored. */
1887 signal (SIGTRAP
, SIG_DFL
);
1890 /* If we initialize SIGQUIT to SIG_IGN, then the SIG_IGN will get
1891 passed to the inferior, which we don't want. It would be
1892 possible to do a "signal (SIGQUIT, SIG_DFL)" after we fork, but
1893 on BSD4.3 systems using vfork, that can affect the
1894 GDB process as well as the inferior (the signal handling tables
1895 might be in memory, shared between the two). Since we establish
1896 a handler for SIGQUIT, when we call exec it will set the signal
1897 to SIG_DFL for us. */
1898 signal (SIGQUIT
, do_nothing
);
1899 if (signal (SIGHUP
, do_nothing
) != SIG_IGN
)
1900 signal (SIGHUP
, disconnect
);
1901 signal (SIGFPE
, float_handler
);
1903 #if defined(SIGWINCH) && defined(SIGWINCH_HANDLER)
1904 signal (SIGWINCH
, SIGWINCH_HANDLER
);
1908 /* Read one line from the command input stream `instream'
1909 into the local static buffer `linebuffer' (whose current length
1911 The buffer is made bigger as necessary.
1912 Returns the address of the start of the line.
1914 NULL is returned for end of file.
1916 *If* the instream == stdin & stdin is a terminal, the line read
1917 is copied into the file line saver (global var char *line,
1918 length linesize) so that it can be duplicated.
1920 This routine either uses fancy command line editing or
1921 simple input as the user has requested. */
1924 command_line_input (prrompt
, repeat
, annotation_suffix
)
1927 char *annotation_suffix
;
1929 static char *linebuffer
= 0;
1930 static unsigned linelength
= 0;
1934 char *local_prompt
= prrompt
;
1938 /* The annotation suffix must be non-NULL. */
1939 if (annotation_suffix
== NULL
)
1940 annotation_suffix
= "";
1942 if (annotation_level
> 1 && instream
== stdin
)
1944 local_prompt
= alloca ((prrompt
== NULL
? 0 : strlen (prrompt
))
1945 + strlen (annotation_suffix
) + 40);
1946 if (prrompt
== NULL
)
1947 local_prompt
[0] = '\0';
1949 strcpy (local_prompt
, prrompt
);
1950 strcat (local_prompt
, "\n\032\032");
1951 strcat (local_prompt
, annotation_suffix
);
1952 strcat (local_prompt
, "\n");
1955 if (linebuffer
== 0)
1958 linebuffer
= (char *) xmalloc (linelength
);
1963 /* Control-C quits instantly if typed while in this loop
1964 since it should not wait until the user types a newline. */
1968 signal (STOP_SIGNAL
, stop_sig
);
1973 /* Make sure that all output has been output. Some machines may let
1974 you get away with leaving out some of the gdb_flush, but not all. */
1976 gdb_flush (gdb_stdout
);
1977 gdb_flush (gdb_stderr
);
1979 if (source_file_name
!= NULL
)
1981 ++source_line_number
;
1982 sprintf (source_error
,
1983 "%s%s:%d: Error in sourced command file:\n",
1986 source_line_number
);
1987 error_pre_print
= source_error
;
1990 if (annotation_level
> 1 && instream
== stdin
)
1992 printf_unfiltered ("\n\032\032pre-");
1993 printf_unfiltered (annotation_suffix
);
1994 printf_unfiltered ("\n");
1997 /* Don't use fancy stuff if not talking to stdin. */
1998 if (readline_hook
&& instream
== NULL
)
2000 rl
= (*readline_hook
) (local_prompt
);
2002 else if (command_editing_p
&& instream
== stdin
&& ISATTY (instream
))
2004 rl
= readline (local_prompt
);
2008 rl
= gdb_readline (local_prompt
);
2011 if (annotation_level
> 1 && instream
== stdin
)
2013 printf_unfiltered ("\n\032\032post-");
2014 printf_unfiltered (annotation_suffix
);
2015 printf_unfiltered ("\n");
2018 if (!rl
|| rl
== (char *) EOF
)
2023 if (strlen(rl
) + 1 + (p
- linebuffer
) > linelength
)
2025 linelength
= strlen(rl
) + 1 + (p
- linebuffer
);
2026 nline
= (char *) xrealloc (linebuffer
, linelength
);
2027 p
+= nline
- linebuffer
;
2031 /* Copy line. Don't copy null at end. (Leaves line alone
2032 if this was just a newline) */
2036 free (rl
); /* Allocated in readline. */
2038 if (p
== linebuffer
|| *(p
- 1) != '\\')
2041 p
--; /* Put on top of '\'. */
2042 local_prompt
= (char *) 0;
2047 signal (STOP_SIGNAL
, SIG_DFL
);
2054 #define SERVER_COMMAND_LENGTH 7
2056 (p
- linebuffer
> SERVER_COMMAND_LENGTH
)
2057 && STREQN (linebuffer
, "server ", SERVER_COMMAND_LENGTH
);
2060 /* Note that we don't set `line'. Between this and the check in
2061 dont_repeat, this insures that repeating will still do the
2064 return linebuffer
+ SERVER_COMMAND_LENGTH
;
2067 /* Do history expansion if that is wished. */
2068 if (history_expansion_p
&& instream
== stdin
2069 && ISATTY (instream
))
2071 char *history_value
;
2074 *p
= '\0'; /* Insert null now. */
2075 expanded
= history_expand (linebuffer
, &history_value
);
2078 /* Print the changes. */
2079 printf_unfiltered ("%s\n", history_value
);
2081 /* If there was an error, call this function again. */
2084 free (history_value
);
2085 return command_line_input (prrompt
, repeat
, annotation_suffix
);
2087 if (strlen (history_value
) > linelength
)
2089 linelength
= strlen (history_value
) + 1;
2090 linebuffer
= (char *) xrealloc (linebuffer
, linelength
);
2092 strcpy (linebuffer
, history_value
);
2093 p
= linebuffer
+ strlen(linebuffer
);
2094 free (history_value
);
2098 /* If we just got an empty line, and that is supposed
2099 to repeat the previous command, return the value in the
2101 if (repeat
&& p
== linebuffer
)
2103 for (p1
= linebuffer
; *p1
== ' ' || *p1
== '\t'; p1
++) ;
2109 /* Add line to history if appropriate. */
2110 if (instream
== stdin
2111 && ISATTY (stdin
) && *linebuffer
)
2112 add_history (linebuffer
);
2114 /* Note: lines consisting solely of comments are added to the command
2115 history. This is useful when you type a command, and then
2116 realize you don't want to execute it quite yet. You can comment
2117 out the command and then later fetch it from the value history
2118 and remove the '#'. The kill ring is probably better, but some
2119 people are in the habit of commenting things out. */
2121 *p1
= '\0'; /* Found a comment. */
2123 /* Save into global buffer if appropriate. */
2126 if (linelength
> linesize
)
2128 line
= xrealloc (line
, linelength
);
2129 linesize
= linelength
;
2131 strcpy (line
, linebuffer
);
2139 /* Expand the body_list of COMMAND so that it can hold NEW_LENGTH
2140 code bodies. This is typically used when we encounter an "else"
2141 clause for an "if" command. */
2144 realloc_body_list (command
, new_length
)
2145 struct command_line
*command
;
2149 struct command_line
**body_list
;
2151 n
= command
->body_count
;
2153 /* Nothing to do? */
2154 if (new_length
<= n
)
2157 body_list
= (struct command_line
**)
2158 xmalloc (sizeof (struct command_line
*) * new_length
);
2160 memcpy (body_list
, command
->body_list
, sizeof (struct command_line
*) * n
);
2162 free (command
->body_list
);
2163 command
->body_list
= body_list
;
2164 command
->body_count
= new_length
;
2167 /* Read one line from the input stream. If the command is an "else" or
2168 "end", return such an indication to the caller. */
2170 static enum misc_command_type
2171 read_next_line (command
)
2172 struct command_line
**command
;
2174 char *p
, *p1
, *prompt_ptr
, control_prompt
[256];
2177 if (control_level
>= 254)
2178 error ("Control nesting too deep!\n");
2180 /* Set a prompt based on the nesting of the control commands. */
2181 if (instream
== stdin
|| (instream
== 0 && readline_hook
!= NULL
))
2183 for (i
= 0; i
< control_level
; i
++)
2184 control_prompt
[i
] = ' ';
2185 control_prompt
[i
] = '>';
2186 control_prompt
[i
+1] = '\0';
2187 prompt_ptr
= (char *)&control_prompt
[0];
2192 p
= command_line_input (prompt_ptr
, instream
== stdin
, "commands");
2194 /* Not sure what to do here. */
2198 /* Strip leading and trailing whitespace. */
2199 while (*p
== ' ' || *p
== '\t')
2202 p1
= p
+ strlen (p
);
2203 while (p1
!= p
&& (p1
[-1] == ' ' || p1
[-1] == '\t'))
2206 /* Blanks and comments don't really do anything, but we need to
2207 distinguish them from else, end and other commands which can be
2209 if (p1
== p
|| p
[0] == '#')
2212 /* Is this the end of a simple, while, or if control structure? */
2213 if (p1
- p
== 3 && !strncmp (p
, "end", 3))
2216 /* Is the else clause of an if control structure? */
2217 if (p1
- p
== 4 && !strncmp (p
, "else", 4))
2218 return else_command
;
2220 /* Check for while, if, break, continue, etc and build a new command
2221 line structure for them. */
2222 if (p1
- p
> 5 && !strncmp (p
, "while", 5))
2223 *command
= build_command_line (while_control
, p
+ 6);
2224 else if (p1
- p
> 2 && !strncmp (p
, "if", 2))
2225 *command
= build_command_line (if_control
, p
+ 3);
2226 else if (p1
- p
== 10 && !strncmp (p
, "loop_break", 10))
2228 *command
= (struct command_line
*)
2229 xmalloc (sizeof (struct command_line
));
2230 (*command
)->next
= NULL
;
2231 (*command
)->line
= NULL
;
2232 (*command
)->control_type
= break_control
;
2233 (*command
)->body_count
= 0;
2234 (*command
)->body_list
= NULL
;
2236 else if (p1
- p
== 13 && !strncmp (p
, "loop_continue", 13))
2238 *command
= (struct command_line
*)
2239 xmalloc (sizeof (struct command_line
));
2240 (*command
)->next
= NULL
;
2241 (*command
)->line
= NULL
;
2242 (*command
)->control_type
= continue_control
;
2243 (*command
)->body_count
= 0;
2244 (*command
)->body_list
= NULL
;
2248 /* A normal command. */
2249 *command
= (struct command_line
*)
2250 xmalloc (sizeof (struct command_line
));
2251 (*command
)->next
= NULL
;
2252 (*command
)->line
= savestring (p
, p1
- p
);
2253 (*command
)->control_type
= simple_control
;
2254 (*command
)->body_count
= 0;
2255 (*command
)->body_list
= NULL
;
2258 /* Nothing special. */
2262 /* Recursively read in the control structures and create a command_line
2263 structure from them.
2265 The parent_control parameter is the control structure in which the
2266 following commands are nested. */
2268 static enum command_control_type
2269 recurse_read_control_structure (current_cmd
)
2270 struct command_line
*current_cmd
;
2272 int current_body
, i
;
2273 enum misc_command_type val
;
2274 enum command_control_type ret
;
2275 struct command_line
**body_ptr
, *child_tail
, *next
;
2280 /* Sanity checks. */
2281 if (current_cmd
->control_type
== simple_control
)
2283 error ("Recursed on a simple control type\n");
2284 return invalid_control
;
2287 if (current_body
> current_cmd
->body_count
)
2289 error ("Allocated body is smaller than this command type needs\n");
2290 return invalid_control
;
2293 /* Read lines from the input stream and build control structures. */
2299 val
= read_next_line (&next
);
2301 /* Just skip blanks and comments. */
2302 if (val
== nop_command
)
2305 if (val
== end_command
)
2307 if (current_cmd
->control_type
== while_control
2308 || current_cmd
->control_type
== if_control
)
2310 /* Success reading an entire control structure. */
2311 ret
= simple_control
;
2316 ret
= invalid_control
;
2321 /* Not the end of a control structure. */
2322 if (val
== else_command
)
2324 if (current_cmd
->control_type
== if_control
2325 && current_body
== 1)
2327 realloc_body_list (current_cmd
, 2);
2334 ret
= invalid_control
;
2341 child_tail
->next
= next
;
2345 body_ptr
= current_cmd
->body_list
;
2346 for (i
= 1; i
< current_body
; i
++)
2355 /* If the latest line is another control structure, then recurse
2357 if (next
->control_type
== while_control
2358 || next
->control_type
== if_control
)
2361 ret
= recurse_read_control_structure (next
);
2364 if (ret
!= simple_control
)
2374 /* Read lines from the input stream and accumulate them in a chain of
2375 struct command_line's, which is then returned. For input from a
2376 terminal, the special command "end" is used to mark the end of the
2377 input, and is not included in the returned chain of commands. */
2379 #define END_MESSAGE "End with a line saying just \"end\"."
2381 struct command_line
*
2382 read_command_lines (prompt
, from_tty
)
2386 struct command_line
*head
, *tail
, *next
;
2387 struct cleanup
*old_chain
;
2388 enum command_control_type ret
;
2389 enum misc_command_type val
;
2391 if (readline_begin_hook
)
2393 /* Note - intentional to merge messages with no newline */
2394 (*readline_begin_hook
) ("%s %s\n", prompt
, END_MESSAGE
);
2396 else if (from_tty
&& input_from_terminal_p ())
2398 printf_unfiltered ("%s\n%s\n", prompt
, END_MESSAGE
);
2399 gdb_flush (gdb_stdout
);
2407 val
= read_next_line (&next
);
2409 /* Ignore blank lines or comments. */
2410 if (val
== nop_command
)
2413 if (val
== end_command
)
2415 ret
= simple_control
;
2419 if (val
!= ok_command
)
2421 ret
= invalid_control
;
2425 if (next
->control_type
== while_control
2426 || next
->control_type
== if_control
)
2429 ret
= recurse_read_control_structure (next
);
2432 if (ret
== invalid_control
)
2443 old_chain
= make_cleanup (free_command_lines
, &head
);
2452 if (ret
!= invalid_control
)
2454 discard_cleanups (old_chain
);
2457 do_cleanups (old_chain
);
2460 if (readline_end_hook
)
2462 (*readline_end_hook
) ();
2467 /* Free a chain of struct command_line's. */
2470 free_command_lines (lptr
)
2471 struct command_line
**lptr
;
2473 register struct command_line
*l
= *lptr
;
2474 register struct command_line
*next
;
2475 struct command_line
**blist
;
2480 if (l
->body_count
> 0)
2482 blist
= l
->body_list
;
2483 for (i
= 0; i
< l
->body_count
; i
++, blist
++)
2484 free_command_lines (blist
);
2493 /* Add an element to the list of info subcommands. */
2496 add_info (name
, fun
, doc
)
2498 void (*fun
) PARAMS ((char *, int));
2501 add_cmd (name
, no_class
, fun
, doc
, &infolist
);
2504 /* Add an alias to the list of info subcommands. */
2507 add_info_alias (name
, oldname
, abbrev_flag
)
2512 add_alias_cmd (name
, oldname
, 0, abbrev_flag
, &infolist
);
2515 /* The "info" command is defined as a prefix, with allow_unknown = 0.
2516 Therefore, its own definition is called only for "info" with no args. */
2520 info_command (arg
, from_tty
)
2524 printf_unfiltered ("\"info\" must be followed by the name of an info command.\n");
2525 help_list (infolist
, "info ", -1, gdb_stdout
);
2528 /* The "complete" command is used by Emacs to implement completion. */
2532 complete_command (arg
, from_tty
)
2544 argpoint
= strlen (arg
);
2546 for (completion
= line_completion_function (arg
, i
= 0, arg
, argpoint
);
2548 completion
= line_completion_function (arg
, ++i
, arg
, argpoint
))
2550 printf_unfiltered ("%s\n", completion
);
2555 /* The "show" command with no arguments shows all the settings. */
2559 show_command (arg
, from_tty
)
2563 cmd_show_list (showlist
, from_tty
, "");
2566 /* Add an element to the list of commands. */
2569 add_com (name
, class, fun
, doc
)
2571 enum command_class
class;
2572 void (*fun
) PARAMS ((char *, int));
2575 add_cmd (name
, class, fun
, doc
, &cmdlist
);
2578 /* Add an alias or abbreviation command to the list of commands. */
2581 add_com_alias (name
, oldname
, class, abbrev_flag
)
2584 enum command_class
class;
2587 add_alias_cmd (name
, oldname
, class, abbrev_flag
, &cmdlist
);
2594 error ("Argument required (%s).", why
);
2599 help_command (command
, from_tty
)
2601 int from_tty
; /* Ignored */
2603 help_cmd (command
, gdb_stdout
);
2607 validate_comname (comname
)
2613 error_no_arg ("name of command to define");
2618 if (!isalnum(*p
) && *p
!= '-' && *p
!= '_')
2619 error ("Junk in argument list: \"%s\"", p
);
2624 /* This is just a placeholder in the command data structures. */
2626 user_defined_command (ignore
, from_tty
)
2633 define_command (comname
, from_tty
)
2637 register struct command_line
*cmds
;
2638 register struct cmd_list_element
*c
, *newc
, *hookc
= 0;
2639 char *tem
= comname
;
2641 #define HOOK_STRING "hook-"
2644 validate_comname (comname
);
2646 /* Look it up, and verify that we got an exact match. */
2647 c
= lookup_cmd (&tem
, cmdlist
, "", -1, 1);
2648 if (c
&& !STREQ (comname
, c
->name
))
2653 if (c
->class == class_user
|| c
->class == class_alias
)
2654 tem
= "Redefine command \"%s\"? ";
2656 tem
= "Really redefine built-in command \"%s\"? ";
2657 if (!query (tem
, c
->name
))
2658 error ("Command \"%s\" not redefined.", c
->name
);
2661 /* If this new command is a hook, then mark the command which it
2662 is hooking. Note that we allow hooking `help' commands, so that
2663 we can hook the `stop' pseudo-command. */
2665 if (!strncmp (comname
, HOOK_STRING
, HOOK_LEN
))
2667 /* Look up cmd it hooks, and verify that we got an exact match. */
2668 tem
= comname
+HOOK_LEN
;
2669 hookc
= lookup_cmd (&tem
, cmdlist
, "", -1, 0);
2670 if (hookc
&& !STREQ (comname
+HOOK_LEN
, hookc
->name
))
2674 warning ("Your new `%s' command does not hook any existing command.",
2676 if (!query ("Proceed? "))
2677 error ("Not confirmed.");
2681 comname
= savestring (comname
, strlen (comname
));
2683 /* If the rest of the commands will be case insensitive, this one
2684 should behave in the same manner. */
2685 for (tem
= comname
; *tem
; tem
++)
2686 if (isupper(*tem
)) *tem
= tolower(*tem
);
2689 sprintf (tmpbuf
, "Type commands for definition of \"%s\".", comname
);
2690 cmds
= read_command_lines (tmpbuf
, from_tty
);
2692 if (c
&& c
->class == class_user
)
2693 free_command_lines (&c
->user_commands
);
2695 newc
= add_cmd (comname
, class_user
, user_defined_command
,
2696 (c
&& c
->class == class_user
)
2697 ? c
->doc
: savestring ("User-defined.", 13), &cmdlist
);
2698 newc
->user_commands
= cmds
;
2700 /* If this new command is a hook, then mark both commands as being
2704 hookc
->hook
= newc
; /* Target gets hooked. */
2705 newc
->hookee
= hookc
; /* We are marked as hooking target cmd. */
2710 document_command (comname
, from_tty
)
2714 struct command_line
*doclines
;
2715 register struct cmd_list_element
*c
;
2716 char *tem
= comname
;
2719 validate_comname (comname
);
2721 c
= lookup_cmd (&tem
, cmdlist
, "", 0, 1);
2723 if (c
->class != class_user
)
2724 error ("Command \"%s\" is built-in.", comname
);
2726 sprintf (tmpbuf
, "Type documentation for \"%s\".", comname
);
2727 doclines
= read_command_lines (tmpbuf
, from_tty
);
2729 if (c
->doc
) free (c
->doc
);
2732 register struct command_line
*cl1
;
2733 register int len
= 0;
2735 for (cl1
= doclines
; cl1
; cl1
= cl1
->next
)
2736 len
+= strlen (cl1
->line
) + 1;
2738 c
->doc
= (char *) xmalloc (len
+ 1);
2741 for (cl1
= doclines
; cl1
; cl1
= cl1
->next
)
2743 strcat (c
->doc
, cl1
->line
);
2745 strcat (c
->doc
, "\n");
2749 free_command_lines (&doclines
);
2753 print_gnu_advertisement ()
2755 printf_unfiltered ("\
2756 GDB is free software and you are welcome to distribute copies of it\n\
2757 under certain conditions; type \"show copying\" to see the conditions.\n\
2758 There is absolutely no warranty for GDB; type \"show warranty\" for details.\n\
2763 print_gdb_version (stream
)
2766 fprintf_filtered (stream
, "\
2767 GDB %s (%s", version
, host_name
);
2769 if (!STREQ (host_name
, target_name
))
2770 fprintf_filtered (stream
, " --target %s", target_name
);
2772 fprintf_filtered (stream
, "), ");
2774 fprintf_filtered (stream
, "Copyright 1996 Free Software Foundation, Inc.");
2779 show_version (args
, from_tty
)
2784 print_gnu_advertisement ();
2785 print_gdb_version (gdb_stdout
);
2786 printf_filtered ("\n");
2790 /* xgdb calls this to reprint the usual GDB prompt. Obsolete now that xgdb
2796 printf_unfiltered ("%s", prompt
);
2797 gdb_flush (gdb_stdout
);
2801 quit_command (args
, from_tty
)
2807 /* An optional expression may be used to cause gdb to terminate with the
2808 value of that expression. */
2811 value_ptr val
= parse_and_eval (args
);
2813 exit_code
= (int) value_as_long (val
);
2816 if (inferior_pid
!= 0 && target_has_execution
)
2820 if (query ("The program is running. Quit anyway (and detach it)? "))
2821 target_detach (args
, from_tty
);
2823 error ("Not confirmed.");
2827 if (query ("The program is running. Quit anyway (and kill it)? "))
2830 error ("Not confirmed.");
2833 /* UDI wants this, to kill the TIP. */
2836 /* Save the history information if it is appropriate to do so. */
2837 if (write_history_p
&& history_filename
)
2838 write_history (history_filename
);
2843 /* Returns whether GDB is running on a terminal and whether the user
2844 desires that questions be asked of them on that terminal. */
2847 input_from_terminal_p ()
2849 return gdb_has_a_terminal () && (instream
== stdin
) & caution
;
2854 pwd_command (args
, from_tty
)
2858 if (args
) error ("The \"pwd\" command does not take an argument: %s", args
);
2859 getcwd (gdb_dirbuf
, sizeof (gdb_dirbuf
));
2861 if (!STREQ (gdb_dirbuf
, current_directory
))
2862 printf_unfiltered ("Working directory %s\n (canonically %s).\n",
2863 current_directory
, gdb_dirbuf
);
2865 printf_unfiltered ("Working directory %s.\n", current_directory
);
2869 cd_command (dir
, from_tty
)
2874 /* Found something other than leading repetitions of "/..". */
2875 int found_real_path
;
2878 /* If the new directory is absolute, repeat is a no-op; if relative,
2879 repeat might be useful but is more likely to be a mistake. */
2883 error_no_arg ("new working directory");
2885 dir
= tilde_expand (dir
);
2886 make_cleanup (free
, dir
);
2888 if (chdir (dir
) < 0)
2889 perror_with_name (dir
);
2892 dir
= savestring (dir
, len
- (len
> 1 && SLASH_P(dir
[len
-1])));
2894 current_directory
= dir
;
2897 if (SLASH_P (current_directory
[0]) && current_directory
[1] == '\0')
2898 current_directory
= concat (current_directory
, dir
, NULL
);
2900 current_directory
= concat (current_directory
, SLASH_STRING
, dir
, NULL
);
2904 /* Now simplify any occurrences of `.' and `..' in the pathname. */
2906 found_real_path
= 0;
2907 for (p
= current_directory
; *p
;)
2909 if (SLASH_P (p
[0]) && p
[1] == '.' && (p
[2] == 0 || SLASH_P (p
[2])))
2911 else if (SLASH_P (p
[0]) && p
[1] == '.' && p
[2] == '.'
2912 && (p
[3] == 0 || SLASH_P (p
[3])))
2914 if (found_real_path
)
2916 /* Search backwards for the directory just before the "/.."
2917 and obliterate it and the "/..". */
2919 while (q
!= current_directory
&& ! SLASH_P (q
[-1]))
2922 if (q
== current_directory
)
2923 /* current_directory is
2924 a relative pathname ("can't happen"--leave it alone). */
2928 strcpy (q
- 1, p
+ 3);
2933 /* We are dealing with leading repetitions of "/..", for example
2934 "/../..", which is the Mach super-root. */
2939 found_real_path
= 1;
2944 forget_cached_source_info ();
2947 pwd_command ((char *) 0, 1);
2950 struct source_cleanup_lines_args
{
2953 char *old_pre_error
;
2954 char *old_error_pre_print
;
2958 source_cleanup_lines (args
)
2961 struct source_cleanup_lines_args
*p
=
2962 (struct source_cleanup_lines_args
*)args
;
2963 source_line_number
= p
->old_line
;
2964 source_file_name
= p
->old_file
;
2965 source_pre_error
= p
->old_pre_error
;
2966 error_pre_print
= p
->old_error_pre_print
;
2971 source_command (args
, from_tty
)
2976 struct cleanup
*old_cleanups
;
2978 struct source_cleanup_lines_args old_lines
;
2983 error ("source command requires pathname of file to source.");
2986 file
= tilde_expand (file
);
2987 old_cleanups
= make_cleanup (free
, file
);
2989 stream
= fopen (file
, FOPEN_RT
);
2991 perror_with_name (file
);
2993 make_cleanup (fclose
, stream
);
2995 old_lines
.old_line
= source_line_number
;
2996 old_lines
.old_file
= source_file_name
;
2997 old_lines
.old_pre_error
= source_pre_error
;
2998 old_lines
.old_error_pre_print
= error_pre_print
;
2999 make_cleanup (source_cleanup_lines
, &old_lines
);
3000 source_line_number
= 0;
3001 source_file_name
= file
;
3002 source_pre_error
= error_pre_print
== NULL
? "" : error_pre_print
;
3003 source_pre_error
= savestring (source_pre_error
, strlen (source_pre_error
));
3004 make_cleanup (free
, source_pre_error
);
3005 /* This will get set every time we read a line. So it won't stay "" for
3007 error_pre_print
= "";
3009 needed_length
= strlen (source_file_name
) + strlen (source_pre_error
) + 80;
3010 if (source_error_allocated
< needed_length
)
3012 source_error_allocated
*= 2;
3013 if (source_error_allocated
< needed_length
)
3014 source_error_allocated
= needed_length
;
3015 if (source_error
== NULL
)
3016 source_error
= xmalloc (source_error_allocated
);
3018 source_error
= xrealloc (source_error
, source_error_allocated
);
3021 read_command_file (stream
);
3023 do_cleanups (old_cleanups
);
3028 echo_command (text
, from_tty
)
3036 while ((c
= *p
++) != '\0')
3040 /* \ at end of argument is used after spaces
3041 so they won't be lost. */
3045 c
= parse_escape (&p
);
3047 printf_filtered ("%c", c
);
3050 printf_filtered ("%c", c
);
3053 /* Force this output to appear now. */
3055 gdb_flush (gdb_stdout
);
3060 dont_repeat_command (ignored
, from_tty
)
3064 *line
= 0; /* Can't call dont_repeat here because we're not
3065 necessarily reading from stdin. */
3068 #ifdef TARGET_BYTE_ORDER_SELECTABLE
3070 /* Functions to manipulate the endianness of the target. */
3072 #ifndef TARGET_BYTE_ORDER_DEFAULT
3073 #define TARGET_BYTE_ORDER_DEFAULT BIG_ENDIAN
3076 int target_byte_order
= TARGET_BYTE_ORDER_DEFAULT
;
3078 static int target_byte_order_auto
= 1;
3080 /* Called if the user enters ``set endian'' without an argument. */
3082 set_endian (args
, from_tty
)
3086 printf_unfiltered ("\"set endian\" must be followed by \"auto\", \"big\" or \"little\".\n");
3087 show_endian (args
, from_tty
);
3090 /* Called by ``set endian big''. */
3092 set_endian_big (args
, from_tty
)
3096 target_byte_order
= BIG_ENDIAN
;
3097 target_byte_order_auto
= 0;
3100 /* Called by ``set endian little''. */
3102 set_endian_little (args
, from_tty
)
3106 target_byte_order
= LITTLE_ENDIAN
;
3107 target_byte_order_auto
= 0;
3110 /* Called by ``set endian auto''. */
3112 set_endian_auto (args
, from_tty
)
3116 target_byte_order_auto
= 1;
3119 /* Called by ``show endian''. */
3121 show_endian (args
, from_tty
)
3126 (target_byte_order_auto
3127 ? "The target endianness is set automatically (currently %s endian)\n"
3128 : "The target is assumed to be %s endian\n");
3129 printf_unfiltered ((char *) msg
, TARGET_BYTE_ORDER
== BIG_ENDIAN
? "big" : "little");
3132 #endif /* defined (TARGET_BYTE_ORDER_SELECTABLE) */
3134 /* Set the endianness from a BFD. */
3136 set_endian_from_file (abfd
)
3139 #ifdef TARGET_BYTE_ORDER_SELECTABLE
3142 if (bfd_big_endian (abfd
))
3145 want
= LITTLE_ENDIAN
;
3146 if (target_byte_order_auto
)
3147 target_byte_order
= want
;
3148 else if (target_byte_order
!= want
)
3149 warning ("%s endian file does not match %s endian target.",
3150 want
== BIG_ENDIAN
? "big" : "little",
3151 TARGET_BYTE_ORDER
== BIG_ENDIAN
? "big" : "little");
3153 #else /* ! defined (TARGET_BYTE_ORDER_SELECTABLE) */
3155 if (bfd_big_endian (abfd
)
3156 ? TARGET_BYTE_ORDER
!= BIG_ENDIAN
3157 : TARGET_BYTE_ORDER
== BIG_ENDIAN
)
3158 warning ("%s endian file does not match %s endian target.",
3159 bfd_big_endian (abfd
) ? "big" : "little",
3160 TARGET_BYTE_ORDER
== BIG_ENDIAN
? "big" : "little");
3162 #endif /* ! defined (TARGET_BYTE_ORDER_SELECTABLE) */
3165 /* Functions to manipulate command line editing control variables. */
3167 /* Number of commands to print in each call to show_commands. */
3168 #define Hist_print 10
3170 show_commands (args
, from_tty
)
3174 /* Index for history commands. Relative to history_base. */
3177 /* Number of the history entry which we are planning to display next.
3178 Relative to history_base. */
3181 /* The first command in the history which doesn't exist (i.e. one more
3182 than the number of the last command). Relative to history_base. */
3185 extern HIST_ENTRY
*history_get
PARAMS ((int));
3187 /* Print out some of the commands from the command history. */
3188 /* First determine the length of the history list. */
3189 hist_len
= history_size
;
3190 for (offset
= 0; offset
< history_size
; offset
++)
3192 if (!history_get (history_base
+ offset
))
3201 if (args
[0] == '+' && args
[1] == '\0')
3202 /* "info editing +" should print from the stored position. */
3205 /* "info editing <exp>" should print around command number <exp>. */
3206 num
= (parse_and_eval_address (args
) - history_base
) - Hist_print
/ 2;
3208 /* "show commands" means print the last Hist_print commands. */
3211 num
= hist_len
- Hist_print
;
3217 /* If there are at least Hist_print commands, we want to display the last
3218 Hist_print rather than, say, the last 6. */
3219 if (hist_len
- num
< Hist_print
)
3221 num
= hist_len
- Hist_print
;
3226 for (offset
= num
; offset
< num
+ Hist_print
&& offset
< hist_len
; offset
++)
3228 printf_filtered ("%5d %s\n", history_base
+ offset
,
3229 (history_get (history_base
+ offset
))->line
);
3232 /* The next command we want to display is the next one that we haven't
3236 /* If the user repeats this command with return, it should do what
3237 "show commands +" does. This is unnecessary if arg is null,
3238 because "show commands +" is not useful after "show commands". */
3239 if (from_tty
&& args
)
3246 /* Called by do_setshow_command. */
3249 set_history_size_command (args
, from_tty
, c
)
3252 struct cmd_list_element
*c
;
3254 if (history_size
== INT_MAX
)
3255 unstifle_history ();
3256 else if (history_size
>= 0)
3257 stifle_history (history_size
);
3260 history_size
= INT_MAX
;
3261 error ("History size must be non-negative");
3267 set_history (args
, from_tty
)
3271 printf_unfiltered ("\"set history\" must be followed by the name of a history subcommand.\n");
3272 help_list (sethistlist
, "set history ", -1, gdb_stdout
);
3277 show_history (args
, from_tty
)
3281 cmd_show_list (showhistlist
, from_tty
, "");
3284 int info_verbose
= 0; /* Default verbose msgs off */
3286 /* Called by do_setshow_command. An elaborate joke. */
3289 set_verbose (args
, from_tty
, c
)
3292 struct cmd_list_element
*c
;
3294 char *cmdname
= "verbose";
3295 struct cmd_list_element
*showcmd
;
3297 showcmd
= lookup_cmd_1 (&cmdname
, showlist
, NULL
, 1);
3301 c
->doc
= "Set verbose printing of informational messages.";
3302 showcmd
->doc
= "Show verbose printing of informational messages.";
3306 c
->doc
= "Set verbosity.";
3307 showcmd
->doc
= "Show verbosity.";
3312 float_handler (signo
)
3315 /* This message is based on ANSI C, section 4.7. Note that integer
3316 divide by zero causes this, so "float" is a misnomer. */
3317 signal (SIGFPE
, float_handler
);
3318 error ("Erroneous arithmetic operation.");
3330 enablebreaklist
= NULL
;
3334 #ifdef TARGET_BYTE_ORDER_SELECTABLE
3338 showhistlist
= NULL
;
3339 unsethistlist
= NULL
;
3340 #if MAINTENANCE_CMDS
3341 maintenancelist
= NULL
;
3342 maintenanceinfolist
= NULL
;
3343 maintenanceprintlist
= NULL
;
3345 setprintlist
= NULL
;
3346 showprintlist
= NULL
;
3347 setchecklist
= NULL
;
3348 showchecklist
= NULL
;
3351 /* Init the history buffer. Note that we are called after the init file(s)
3352 * have been read so that the user can change the history file via his
3353 * .gdbinit file (for instance). The GDBHISTFILE environment variable
3354 * overrides all of this.
3362 tmpenv
= getenv ("HISTSIZE");
3364 history_size
= atoi (tmpenv
);
3365 else if (!history_size
)
3368 stifle_history (history_size
);
3370 tmpenv
= getenv ("GDBHISTFILE");
3372 history_filename
= savestring (tmpenv
, strlen(tmpenv
));
3373 else if (!history_filename
) {
3374 /* We include the current directory so that if the user changes
3375 directories the file written will be the same as the one
3377 history_filename
= concat (current_directory
, "/.gdb_history", NULL
);
3379 read_history (history_filename
);
3385 struct cmd_list_element
*c
;
3387 #ifdef TARGET_BYTE_ORDER_SELECTABLE
3389 add_prefix_cmd ("endian", class_support
, set_endian
,
3390 "Set endianness of target.",
3391 &endianlist
, "set endian ", 0, &setlist
);
3392 add_cmd ("big", class_support
, set_endian_big
,
3393 "Set target as being big endian.", &endianlist
);
3394 add_cmd ("little", class_support
, set_endian_little
,
3395 "Set target as being little endian.", &endianlist
);
3396 add_cmd ("auto", class_support
, set_endian_auto
,
3397 "Select target endianness automatically.", &endianlist
);
3398 add_cmd ("endian", class_support
, show_endian
,
3399 "Show endianness of target.", &showlist
);
3401 #endif /* defined (TARGET_BYTE_ORDER_SELECTABLE) */
3403 #ifdef DEFAULT_PROMPT
3404 prompt
= savestring (DEFAULT_PROMPT
, strlen(DEFAULT_PROMPT
));
3406 prompt
= savestring ("(gdb) ", 6);
3409 /* Set the important stuff up for command editing. */
3410 command_editing_p
= 1;
3411 history_expansion_p
= 0;
3412 write_history_p
= 0;
3414 /* Setup important stuff for command line editing. */
3415 rl_completion_entry_function
= (int (*)()) readline_line_completion_function
;
3416 rl_completer_word_break_characters
= gdb_completer_word_break_characters
;
3417 rl_completer_quote_characters
= gdb_completer_quote_characters
;
3418 rl_readline_name
= "gdb";
3420 /* Define the classes of commands.
3421 They will appear in the help list in the reverse of this order. */
3423 add_cmd ("internals", class_maintenance
, NO_FUNCTION
,
3424 "Maintenance commands.\n\
3425 Some gdb commands are provided just for use by gdb maintainers.\n\
3426 These commands are subject to frequent change, and may not be as\n\
3427 well documented as user commands.",
3429 add_cmd ("obscure", class_obscure
, NO_FUNCTION
, "Obscure features.", &cmdlist
);
3430 add_cmd ("aliases", class_alias
, NO_FUNCTION
, "Aliases of other commands.", &cmdlist
);
3431 add_cmd ("user-defined", class_user
, NO_FUNCTION
, "User-defined commands.\n\
3432 The commands in this class are those defined by the user.\n\
3433 Use the \"define\" command to define a command.", &cmdlist
);
3434 add_cmd ("support", class_support
, NO_FUNCTION
, "Support facilities.", &cmdlist
);
3435 add_cmd ("status", class_info
, NO_FUNCTION
, "Status inquiries.", &cmdlist
);
3436 add_cmd ("files", class_files
, NO_FUNCTION
, "Specifying and examining files.", &cmdlist
);
3437 add_cmd ("breakpoints", class_breakpoint
, NO_FUNCTION
, "Making program stop at certain points.", &cmdlist
);
3438 add_cmd ("data", class_vars
, NO_FUNCTION
, "Examining data.", &cmdlist
);
3439 add_cmd ("stack", class_stack
, NO_FUNCTION
, "Examining the stack.\n\
3440 The stack is made up of stack frames. Gdb assigns numbers to stack frames\n\
3441 counting from zero for the innermost (currently executing) frame.\n\n\
3442 At any time gdb identifies one frame as the \"selected\" frame.\n\
3443 Variable lookups are done with respect to the selected frame.\n\
3444 When the program being debugged stops, gdb selects the innermost frame.\n\
3445 The commands below can be used to select other frames by number or address.",
3447 add_cmd ("running", class_run
, NO_FUNCTION
, "Running the program.", &cmdlist
);
3449 add_com ("pwd", class_files
, pwd_command
,
3450 "Print working directory. This is used for your program as well.");
3451 c
= add_cmd ("cd", class_files
, cd_command
,
3452 "Set working directory to DIR for debugger and program being debugged.\n\
3453 The change does not take effect for the program being debugged\n\
3454 until the next time it is started.", &cmdlist
);
3455 c
->completer
= filename_completer
;
3458 (add_set_cmd ("prompt", class_support
, var_string
, (char *)&prompt
,
3463 add_com ("echo", class_support
, echo_command
,
3464 "Print a constant string. Give string as argument.\n\
3465 C escape sequences may be used in the argument.\n\
3466 No newline is added at the end of the argument;\n\
3467 use \"\\n\" if you want a newline to be printed.\n\
3468 Since leading and trailing whitespace are ignored in command arguments,\n\
3469 if you want to print some you must use \"\\\" before leading whitespace\n\
3470 to be printed or after trailing whitespace.");
3471 add_com ("document", class_support
, document_command
,
3472 "Document a user-defined command.\n\
3473 Give command name as argument. Give documentation on following lines.\n\
3474 End with a line of just \"end\".");
3475 add_com ("define", class_support
, define_command
,
3476 "Define a new command name. Command name is argument.\n\
3477 Definition appears on following lines, one command per line.\n\
3478 End with a line of just \"end\".\n\
3479 Use the \"document\" command to give documentation for the new command.\n\
3480 Commands defined in this way may have up to ten arguments.");
3483 c
= add_cmd ("source", class_support
, source_command
,
3484 "Read commands from a file named FILE.\n\
3485 Note that the file \"" GDBINIT_FILENAME
"\" is read automatically in this way\n\
3486 when gdb is started.", &cmdlist
);
3488 /* Punt file name, we can't help it easily. */
3489 c
= add_cmd ("source", class_support
, source_command
,
3490 "Read commands from a file named FILE.\n\
3491 Note that the file \".gdbinit\" is read automatically in this way\n\
3492 when gdb is started.", &cmdlist
);
3494 c
->completer
= filename_completer
;
3496 add_com ("quit", class_support
, quit_command
, "Exit gdb.");
3497 add_com ("help", class_support
, help_command
, "Print list of commands.");
3498 add_com_alias ("q", "quit", class_support
, 1);
3499 add_com_alias ("h", "help", class_support
, 1);
3501 add_com ("dont-repeat", class_support
, dont_repeat_command
, "Don't repeat this command.\n\
3502 Primarily used inside of user-defined commands that should not be repeated when\n\
3505 c
= add_set_cmd ("verbose", class_support
, var_boolean
, (char *)&info_verbose
,
3508 add_show_from_set (c
, &showlist
);
3509 c
->function
.sfunc
= set_verbose
;
3510 set_verbose (NULL
, 0, c
);
3513 (add_set_cmd ("editing", class_support
, var_boolean
, (char *)&command_editing_p
,
3514 "Set editing of command lines as they are typed.\n\
3515 Use \"on\" to enable to enable the editing, and \"off\" to disable it.\n\
3516 Without an argument, command line editing is enabled. To edit, use\n\
3517 EMACS-like or VI-like commands like control-P or ESC.", &setlist
),
3520 add_prefix_cmd ("history", class_support
, set_history
,
3521 "Generic command for setting command history parameters.",
3522 &sethistlist
, "set history ", 0, &setlist
);
3523 add_prefix_cmd ("history", class_support
, show_history
,
3524 "Generic command for showing command history parameters.",
3525 &showhistlist
, "show history ", 0, &showlist
);
3528 (add_set_cmd ("expansion", no_class
, var_boolean
, (char *)&history_expansion_p
,
3529 "Set history expansion on command input.\n\
3530 Without an argument, history expansion is enabled.", &sethistlist
),
3534 (add_set_cmd ("save", no_class
, var_boolean
, (char *)&write_history_p
,
3535 "Set saving of the history record on exit.\n\
3536 Use \"on\" to enable to enable the saving, and \"off\" to disable it.\n\
3537 Without an argument, saving is enabled.", &sethistlist
),
3540 c
= add_set_cmd ("size", no_class
, var_integer
, (char *)&history_size
,
3541 "Set the size of the command history, \n\
3542 ie. the number of previous commands to keep a record of.", &sethistlist
);
3543 add_show_from_set (c
, &showhistlist
);
3544 c
->function
.sfunc
= set_history_size_command
;
3547 (add_set_cmd ("filename", no_class
, var_filename
, (char *)&history_filename
,
3548 "Set the filename in which to record the command history\n\
3549 (the list of previous commands of which a record is kept).", &sethistlist
),
3553 (add_set_cmd ("confirm", class_support
, var_boolean
,
3555 "Set whether to confirm potentially dangerous operations.",
3559 add_prefix_cmd ("info", class_info
, info_command
,
3560 "Generic command for showing things about the program being debugged.",
3561 &infolist
, "info ", 0, &cmdlist
);
3562 add_com_alias ("i", "info", class_info
, 1);
3564 add_com ("complete", class_obscure
, complete_command
,
3565 "List the completions for the rest of the line as a command.");
3567 add_prefix_cmd ("show", class_info
, show_command
,
3568 "Generic command for showing things about the debugger.",
3569 &showlist
, "show ", 0, &cmdlist
);
3570 /* Another way to get at the same thing. */
3571 add_info ("set", show_command
, "Show all GDB settings.");
3573 add_cmd ("commands", no_class
, show_commands
,
3574 "Show the history of commands you typed.\n\
3575 You can supply a command number to start with, or a `+' to start after\n\
3576 the previous command number shown.",
3579 add_cmd ("version", no_class
, show_version
,
3580 "Show what version of GDB this is.", &showlist
);
3582 add_com ("while", class_support
, while_command
,
3583 "Execute nested commands WHILE the conditional expression is non zero.\n\
3584 The conditional expression must follow the word `while' and must in turn be\n\
3585 followed by a new line. The nested commands must be entered one per line,\n\
3586 and should be terminated by the word `end'.");
3588 add_com ("if", class_support
, if_command
,
3589 "Execute nested commands once IF the conditional expression is non zero.\n\
3590 The conditional expression must follow the word `if' and must in turn be\n\
3591 followed by a new line. The nested commands must be entered one per line,\n\
3592 and should be terminated by the word 'else' or `end'. If an else clause\n\
3593 is used, the same rules apply to its nested commands as to the first ones.");
3595 /* If target is open when baud changes, it doesn't take effect until the
3596 next open (I think, not sure). */
3597 add_show_from_set (add_set_cmd ("remotebaud", no_class
,
3598 var_zinteger
, (char *)&baud_rate
,
3599 "Set baud rate for remote serial I/O.\n\
3600 This value is used to set the speed of the serial port when debugging\n\
3601 using remote targets.", &setlist
),
3605 add_set_cmd ("remotedebug", no_class
, var_zinteger
, (char *)&remote_debug
,
3606 "Set debugging of remote protocol.\n\
3607 When enabled, each packet sent or received with the remote target\n\
3608 is displayed.", &setlist
),
3612 add_set_cmd ("remotetimeout", no_class
, var_integer
, (char *)&remote_timeout
,
3613 "Set timeout limit to wait for target to respond.\n\
3614 This value is used to set the time limit for gdb to wait for a response\n\
3615 from he target.", &setlist
),