1 /* Top level stuff for GDB, the GNU debugger.
2 Copyright 1986, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 1998
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 extern void initialize_utils PARAMS ((void));
56 /* Prototypes for local functions */
58 static void dont_repeat_command PARAMS ((char *, int));
60 static void source_cleanup_lines PARAMS ((PTR));
62 static void user_defined_command PARAMS ((char *, int));
64 static void init_signals PARAMS ((void));
67 static void stop_sig PARAMS ((int));
70 static char * line_completion_function PARAMS ((char *, int, char *, int));
72 static char * readline_line_completion_function PARAMS ((char *, int));
74 static void command_loop_marker PARAMS ((int));
76 static void while_command PARAMS ((char *, int));
78 static void if_command PARAMS ((char *, int));
80 static struct command_line *
81 build_command_line PARAMS ((enum command_control_type, char *));
83 static struct command_line *
84 get_command_line PARAMS ((enum command_control_type, char *));
86 static void realloc_body_list PARAMS ((struct command_line *, int));
88 static enum misc_command_type read_next_line PARAMS ((struct command_line **));
90 static enum command_control_type
91 recurse_read_control_structure PARAMS ((struct command_line *));
93 static struct cleanup * setup_user_args PARAMS ((char *));
95 static char * locate_arg PARAMS ((char *));
97 static char * insert_args PARAMS ((char *));
99 static void arg_cleanup PARAMS ((void));
101 static void init_main PARAMS ((void));
103 static void init_cmd_lists PARAMS ((void));
105 static void float_handler PARAMS ((int));
107 static void init_signals PARAMS ((void));
109 static void set_verbose PARAMS ((char *, int, struct cmd_list_element *));
111 static void set_endian PARAMS ((char *, int));
113 static void set_endian_big PARAMS ((char *, int));
115 static void set_endian_little PARAMS ((char *, int));
117 static void set_endian_auto PARAMS ((char *, int));
119 static void show_endian PARAMS ((char *, int));
121 static void set_architecture PARAMS ((char *, int));
123 static void show_architecture PARAMS ((char *, int));
125 static void info_architecture PARAMS ((char *, int));
127 static void show_history PARAMS ((char *, int));
129 static void set_history PARAMS ((char *, int));
131 static void set_history_size_command PARAMS ((char *, int,
132 struct cmd_list_element *));
134 static void show_commands PARAMS ((char *, int));
136 static void echo_command PARAMS ((char *, int));
138 static void pwd_command PARAMS ((char *, int));
140 static void show_version PARAMS ((char *, int));
142 static void document_command PARAMS ((char *, int));
144 static void define_command PARAMS ((char *, int));
146 static void validate_comname PARAMS ((char *));
148 static void help_command PARAMS ((char *, int));
150 static void show_command PARAMS ((char *, int));
152 static void info_command PARAMS ((char *, int));
154 static void complete_command PARAMS ((char *, int));
156 static void do_nothing PARAMS ((int));
159 static int quit_cover PARAMS ((char *));
161 static void disconnect PARAMS ((int));
164 static void source_cleanup PARAMS ((FILE *));
166 /* If this definition isn't overridden by the header files, assume
167 that isatty and fileno exist on this system. */
169 #define ISATTY(FP) (isatty (fileno (FP)))
172 /* Initialization file name for gdb. This is overridden in some configs. */
174 #ifndef GDBINIT_FILENAME
175 #define GDBINIT_FILENAME ".gdbinit"
177 char gdbinit[] = GDBINIT_FILENAME;
179 int inhibit_gdbinit = 0;
181 /* If nonzero, and GDB has been configured to be able to use windows,
182 attempt to open them upon startup. */
186 /* Version number of GDB, as a string. */
188 extern char *version;
190 /* Canonical host name as a string. */
192 extern char *host_name;
194 /* Canonical target name as a string. */
196 extern char *target_name;
198 extern char lang_frame_mismatch_warn[]; /* language.c */
200 /* Flag for whether we want all the "from_tty" gubbish printed. */
202 int caution = 1; /* Default is yes, sigh. */
204 /* Define all cmd_list_elements. */
206 /* Chain containing all defined commands. */
208 struct cmd_list_element *cmdlist;
210 /* Chain containing all defined info subcommands. */
212 struct cmd_list_element *infolist;
214 /* Chain containing all defined enable subcommands. */
216 struct cmd_list_element *enablelist;
218 /* Chain containing all defined disable subcommands. */
220 struct cmd_list_element *disablelist;
222 /* Chain containing all defined delete subcommands. */
224 struct cmd_list_element *deletelist;
226 /* Chain containing all defined "enable breakpoint" subcommands. */
228 struct cmd_list_element *enablebreaklist;
230 /* Chain containing all defined set subcommands */
232 struct cmd_list_element *setlist;
234 /* Chain containing all defined unset subcommands */
236 struct cmd_list_element *unsetlist;
238 /* Chain containing all defined show subcommands. */
240 struct cmd_list_element *showlist;
242 /* Chain containing the \"set endian\" commands. */
244 struct cmd_list_element *endianlist;
246 /* Chain containing all defined \"set history\". */
248 struct cmd_list_element *sethistlist;
250 /* Chain containing all defined \"show history\". */
252 struct cmd_list_element *showhistlist;
254 /* Chain containing all defined \"unset history\". */
256 struct cmd_list_element *unsethistlist;
258 /* Chain containing all defined maintenance subcommands. */
261 struct cmd_list_element *maintenancelist;
264 /* Chain containing all defined "maintenance info" subcommands. */
267 struct cmd_list_element *maintenanceinfolist;
270 /* Chain containing all defined "maintenance print" subcommands. */
273 struct cmd_list_element *maintenanceprintlist;
276 struct cmd_list_element *setprintlist;
278 struct cmd_list_element *showprintlist;
280 struct cmd_list_element *setchecklist;
282 struct cmd_list_element *showchecklist;
284 /* stdio stream that command input is being read from. Set to stdin normally.
285 Set by source_command to the file we are sourcing. Set to NULL if we are
286 executing a user-defined command or interacting via a GUI. */
290 /* Current working directory. */
292 char *current_directory;
294 /* The directory name is actually stored here (usually). */
295 char gdb_dirbuf[1024];
297 /* Function to call before reading a command, if nonzero.
298 The function receives two args: an input stream,
299 and a prompt string. */
301 void (*window_hook) PARAMS ((FILE *, char *));
306 /* gdb prints this when reading a command interactively */
309 /* Buffer used for reading command lines, and the size
310 allocated for it so far. */
315 /* Nonzero if the current command is modified by "server ". This
316 affects things like recording into the command history, comamnds
317 repeating on RETURN, etc. This is so a user interface (emacs, GUI,
318 whatever) can issue its own commands and also send along commands
319 from the user, and have the user not notice that the user interface
320 is issuing commands too. */
323 /* Baud rate specified for talking to serial target systems. Default
324 is left as -1, so targets can choose their own defaults. */
325 /* FIXME: This means that "show remotebaud" and gr_files_info can print -1
326 or (unsigned int)-1. This is a Bad User Interface. */
330 /* Timeout limit for response from target. */
332 int remote_timeout = 20; /* Set default to 20 */
334 /* Non-zero tells remote* modules to output debugging info. */
336 int remote_debug = 0;
338 /* Level of control structure. */
339 static int control_level;
341 /* Structure for arguments to user defined functions. */
342 #define MAXUSERARGS 10
345 struct user_args *next;
354 /* Signal to catch ^Z typed while reading a command: SIGTSTP or SIGCONT. */
358 #define STOP_SIGNAL SIGTSTP
359 static void stop_sig PARAMS ((int));
363 /* Some System V have job control but not sigsetmask(). */
364 #if !defined (HAVE_SIGSETMASK)
366 #define HAVE_SIGSETMASK 1
368 #define HAVE_SIGSETMASK 0
372 #if 0 == (HAVE_SIGSETMASK)
373 #define sigsetmask(n)
376 /* Hooks for alternate command interfaces. */
378 /* Called after most modules have been initialized, but before taking users
381 void (*init_ui_hook) PARAMS ((char *argv0));
383 void (*ui_loop_hook) PARAMS ((int));
386 /* Called instead of command_loop at top level. Can be invoked via
387 return_to_top_level. */
389 void (*command_loop_hook) PARAMS ((void));
392 /* Called instead of fputs for all output. */
394 void (*fputs_unfiltered_hook) PARAMS ((const char *linebuffer, FILE *stream));
396 /* Called when the target says something to the host, which may
397 want to appear in a different window. */
399 void (*target_output_hook) PARAMS ((char *));
401 /* Called from print_frame_info to list the line we stopped in. */
403 void (*print_frame_info_listing_hook) PARAMS ((struct symtab *s, int line,
404 int stopline, int noerror));
405 /* Replaces most of query. */
407 int (*query_hook) PARAMS ((const char *, va_list));
409 /* Replaces most of warning. */
411 void (*warning_hook) PARAMS ((const char *, va_list));
413 /* Called from gdb_flush to flush output. */
415 void (*flush_hook) PARAMS ((FILE *stream));
417 /* These three functions support getting lines of text from the user. They
418 are used in sequence. First readline_begin_hook is called with a text
419 string that might be (for example) a message for the user to type in a
420 sequence of commands to be executed at a breakpoint. If this function
421 calls back to a GUI, it might take this opportunity to pop up a text
422 interaction window with this message. Next, readline_hook is called
423 with a prompt that is emitted prior to collecting the user input.
424 It can be called multiple times. Finally, readline_end_hook is called
425 to notify the GUI that we are done with the interaction window and it
428 void (*readline_begin_hook) PARAMS ((char *, ...));
429 char * (*readline_hook) PARAMS ((char *));
430 void (*readline_end_hook) PARAMS ((void));
432 /* Called as appropriate to notify the interface of the specified breakpoint
435 void (*create_breakpoint_hook) PARAMS ((struct breakpoint *bpt));
436 void (*delete_breakpoint_hook) PARAMS ((struct breakpoint *bpt));
437 void (*modify_breakpoint_hook) PARAMS ((struct breakpoint *bpt));
439 /* Called during long calculations to allow GUI to repair window damage, and to
440 check for stop buttons, etc... */
442 void (*interactive_hook) PARAMS ((void));
444 /* Called when the registers have changed, as a hint to a GUI
445 to minimize window update. */
447 void (*registers_changed_hook) PARAMS ((void));
449 /* tell the GUI someone changed the PC */
450 void (*pc_changed_hook) PARAMS ((void));
452 /* Called when going to wait for the target. Usually allows the GUI to run
453 while waiting for target events. */
455 int (*target_wait_hook) PARAMS ((int pid, struct target_waitstatus *status));
457 /* Used by UI as a wrapper around command execution. May do various things
458 like enabling/disabling buttons, etc... */
460 void (*call_command_hook) PARAMS ((struct cmd_list_element *c, char *cmd,
463 /* Called when the current thread changes. Argument is thread id. */
465 void (*context_hook) PARAMS ((int id));
467 /* Takes control from error (). Typically used to prevent longjmps out of the
468 middle of the GUI. Usually used in conjunction with a catch routine. */
470 NORETURN void (*error_hook) PARAMS ((void)) ATTR_NORETURN;
473 /* Where to go for return_to_top_level (RETURN_ERROR). */
474 SIGJMP_BUF error_return;
475 /* Where to go for return_to_top_level (RETURN_QUIT). */
476 SIGJMP_BUF quit_return;
478 /* Return for reason REASON. This generally gets back to the command
479 loop, but can be caught via catch_errors. */
482 return_to_top_level (reason)
483 enum return_reason reason;
488 /* Perhaps it would be cleaner to do this via the cleanup chain (not sure
489 I can think of a reason why that is vital, though). */
490 bpstat_clear_actions(stop_bpstat); /* Clear queued breakpoint commands */
492 disable_current_display ();
493 do_cleanups (ALL_CLEANUPS);
495 if (annotation_level > 1)
506 (NORETURN void) SIGLONGJMP
507 (reason == RETURN_ERROR ? error_return : quit_return, 1);
510 /* Call FUNC with arg ARGS, catching any errors. If there is no
511 error, return the value returned by FUNC. If there is an error,
512 print ERRSTRING, print the specific error message, then return
515 Must not be called with immediate_quit in effect (bad things might
516 happen, say we got a signal in the middle of a memcpy to quit_return).
517 This is an OK restriction; with very few exceptions immediate_quit can
518 be replaced by judicious use of QUIT.
520 MASK specifies what to catch; it is normally set to
521 RETURN_MASK_ALL, if for no other reason than that the code which
522 calls catch_errors might not be set up to deal with a quit which
523 isn't caught. But if the code can deal with it, it generally
524 should be RETURN_MASK_ERROR, unless for some reason it is more
525 useful to abort only the portion of the operation inside the
526 catch_errors. Note that quit should return to the command line
527 fairly quickly, even if some further processing is being done. */
530 catch_errors (func, args, errstring, mask)
531 int (*func) PARAMS ((char *));
536 SIGJMP_BUF saved_error;
537 SIGJMP_BUF saved_quit;
540 struct cleanup *saved_cleanup_chain;
541 char *saved_error_pre_print;
542 char *saved_quit_pre_print;
544 saved_cleanup_chain = save_cleanups ();
545 saved_error_pre_print = error_pre_print;
546 saved_quit_pre_print = quit_pre_print;
548 if (mask & RETURN_MASK_ERROR)
550 memcpy ((char *)saved_error, (char *)error_return, sizeof (SIGJMP_BUF));
551 error_pre_print = errstring;
553 if (mask & RETURN_MASK_QUIT)
555 memcpy (saved_quit, quit_return, sizeof (SIGJMP_BUF));
556 quit_pre_print = errstring;
559 if (SIGSETJMP (tmp_jmp) == 0)
561 if (mask & RETURN_MASK_ERROR)
562 memcpy (error_return, tmp_jmp, sizeof (SIGJMP_BUF));
563 if (mask & RETURN_MASK_QUIT)
564 memcpy (quit_return, tmp_jmp, sizeof (SIGJMP_BUF));
565 val = (*func) (args);
570 restore_cleanups (saved_cleanup_chain);
572 if (mask & RETURN_MASK_ERROR)
574 memcpy (error_return, saved_error, sizeof (SIGJMP_BUF));
575 error_pre_print = saved_error_pre_print;
577 if (mask & RETURN_MASK_QUIT)
579 memcpy (quit_return, saved_quit, sizeof (SIGJMP_BUF));
580 quit_pre_print = saved_quit_pre_print;
585 /* Handler for SIGHUP. */
592 catch_errors (quit_cover, NULL,
593 "Could not kill the program being debugged", RETURN_MASK_ALL);
594 signal (SIGHUP, SIG_DFL);
595 kill (getpid (), SIGHUP);
598 /* Just a little helper function for disconnect(). */
604 caution = 0; /* Throw caution to the wind -- we're exiting.
605 This prevents asking the user dumb questions. */
606 quit_command((char *)0, 0);
609 #endif /* defined SIGHUP */
611 /* Line number we are currently in in a file which is being sourced. */
612 static int source_line_number;
614 /* Name of the file we are sourcing. */
615 static char *source_file_name;
617 /* Buffer containing the error_pre_print used by the source stuff.
619 static char *source_error;
620 static int source_error_allocated;
622 /* Something to glom on to the start of error_pre_print if source_file_name
624 static char *source_pre_error;
626 /* Clean up on error during a "source" command (or execution of a
627 user-defined command). */
630 source_cleanup (stream)
633 /* Restore the previous input stream. */
637 /* Read commands from STREAM. */
639 read_command_file (stream)
642 struct cleanup *cleanups;
644 cleanups = make_cleanup ((make_cleanup_func) source_cleanup, instream);
647 do_cleanups (cleanups);
650 extern void init_proc PARAMS ((void));
652 void (*pre_init_ui_hook) PARAMS ((void));
658 if (pre_init_ui_hook)
661 /* Run the init function of each source file */
663 getcwd (gdb_dirbuf, sizeof (gdb_dirbuf));
664 current_directory = gdb_dirbuf;
666 init_cmd_lists (); /* This needs to be done first */
667 initialize_targets (); /* Setup target_terminal macros for utils.c */
668 initialize_utils (); /* Make errors and warnings possible */
669 initialize_all_files ();
670 init_main (); /* But that omits this file! Do it now */
675 /* We need a default language for parsing expressions, so simple things like
676 "set width 0" won't fail if no language is explicitly set in a config file
677 or implicitly set by reading an executable during startup. */
678 set_language (language_c);
679 expected_language = current_language; /* don't warn about the change. */
682 init_ui_hook (argv0);
685 /* Allocate, initialize a new command line structure for one of the
686 control commands (if/while). */
688 static struct command_line *
689 build_command_line (type, args)
690 enum command_control_type type;
693 struct command_line *cmd;
696 error ("if/while commands require arguments.\n");
698 cmd = (struct command_line *)xmalloc (sizeof (struct command_line));
700 cmd->control_type = type;
704 = (struct command_line **)xmalloc (sizeof (struct command_line *)
706 memset (cmd->body_list, 0, sizeof (struct command_line *) * cmd->body_count);
707 cmd->line = savestring (args, strlen (args));
711 /* Build and return a new command structure for the control commands
712 such as "if" and "while". */
714 static struct command_line *
715 get_command_line (type, arg)
716 enum command_control_type type;
719 struct command_line *cmd;
720 struct cleanup *old_chain = NULL;
722 /* Allocate and build a new command line structure. */
723 cmd = build_command_line (type, arg);
725 old_chain = make_cleanup ((make_cleanup_func) free_command_lines, &cmd);
727 /* Read in the body of this command. */
728 if (recurse_read_control_structure (cmd) == invalid_control)
730 warning ("error reading in control structure\n");
731 do_cleanups (old_chain);
735 discard_cleanups (old_chain);
739 /* Recursively print a command (including full control structures). */
741 print_command_line (cmd, depth)
742 struct command_line *cmd;
749 for (i = 0; i < depth; i++)
750 fputs_filtered (" ", gdb_stdout);
753 /* A simple command, print it and return. */
754 if (cmd->control_type == simple_control)
756 fputs_filtered (cmd->line, gdb_stdout);
757 fputs_filtered ("\n", gdb_stdout);
761 /* loop_continue to jump to the start of a while loop, print it
763 if (cmd->control_type == continue_control)
765 fputs_filtered ("loop_continue\n", gdb_stdout);
769 /* loop_break to break out of a while loop, print it and return. */
770 if (cmd->control_type == break_control)
772 fputs_filtered ("loop_break\n", gdb_stdout);
776 /* A while command. Recursively print its subcommands before returning. */
777 if (cmd->control_type == while_control)
779 struct command_line *list;
780 fputs_filtered ("while ", gdb_stdout);
781 fputs_filtered (cmd->line, gdb_stdout);
782 fputs_filtered ("\n", gdb_stdout);
783 list = *cmd->body_list;
786 print_command_line (list, depth + 1);
791 /* An if command. Recursively print both arms before returning. */
792 if (cmd->control_type == if_control)
794 fputs_filtered ("if ", gdb_stdout);
795 fputs_filtered (cmd->line, gdb_stdout);
796 fputs_filtered ("\n", gdb_stdout);
798 print_command_line (cmd->body_list[0], depth + 1);
800 /* Show the false arm if it exists. */
801 if (cmd->body_count == 2)
805 for (i = 0; i < depth; i++)
806 fputs_filtered (" ", gdb_stdout);
808 fputs_filtered ("else\n", gdb_stdout);
809 print_command_line (cmd->body_list[1], depth + 1);
813 for (i = 0; i < depth; i++)
814 fputs_filtered (" ", gdb_stdout);
816 fputs_filtered ("end\n", gdb_stdout);
820 /* Execute the command in CMD. */
822 enum command_control_type
823 execute_control_command (cmd)
824 struct command_line *cmd;
826 struct expression *expr;
827 struct command_line *current;
828 struct cleanup *old_chain = 0;
832 enum command_control_type ret;
835 switch (cmd->control_type)
838 /* A simple command, execute it and return. */
839 new_line = insert_args (cmd->line);
841 return invalid_control;
842 old_chain = make_cleanup ((make_cleanup_func) free_current_contents,
844 execute_command (new_line, 0);
845 ret = cmd->control_type;
848 case continue_control:
850 /* Return for "continue", and "break" so we can either
851 continue the loop at the top, or break out. */
852 ret = cmd->control_type;
857 /* Parse the loop control expression for the while statement. */
858 new_line = insert_args (cmd->line);
860 return invalid_control;
861 old_chain = make_cleanup ((make_cleanup_func) free_current_contents,
863 expr = parse_expression (new_line);
864 make_cleanup ((make_cleanup_func) free_current_contents, &expr);
866 ret = simple_control;
869 /* Keep iterating so long as the expression is true. */
876 /* Evaluate the expression. */
877 val_mark = value_mark ();
878 val = evaluate_expression (expr);
879 cond_result = value_true (val);
880 value_free_to_mark (val_mark);
882 /* If the value is false, then break out of the loop. */
886 /* Execute the body of the while statement. */
887 current = *cmd->body_list;
890 ret = execute_control_command (current);
892 /* If we got an error, or a "break" command, then stop
894 if (ret == invalid_control || ret == break_control)
900 /* If we got a "continue" command, then restart the loop
902 if (ret == continue_control)
905 /* Get the next statement. */
906 current = current->next;
910 /* Reset RET so that we don't recurse the break all the way down. */
911 if (ret == break_control)
912 ret = simple_control;
919 new_line = insert_args (cmd->line);
921 return invalid_control;
922 old_chain = make_cleanup ((make_cleanup_func) free_current_contents,
924 /* Parse the conditional for the if statement. */
925 expr = parse_expression (new_line);
926 make_cleanup ((make_cleanup_func) free_current_contents, &expr);
929 ret = simple_control;
931 /* Evaluate the conditional. */
932 val_mark = value_mark ();
933 val = evaluate_expression (expr);
935 /* Choose which arm to take commands from based on the value of the
936 conditional expression. */
937 if (value_true (val))
938 current = *cmd->body_list;
939 else if (cmd->body_count == 2)
940 current = *(cmd->body_list + 1);
941 value_free_to_mark (val_mark);
943 /* Execute commands in the given arm. */
946 ret = execute_control_command (current);
948 /* If we got an error, get out. */
949 if (ret != simple_control)
952 /* Get the next statement in the body. */
953 current = current->next;
960 warning ("Invalid control type in command structure.");
961 return invalid_control;
965 do_cleanups (old_chain);
970 /* "while" command support. Executes a body of statements while the
971 loop condition is nonzero. */
974 while_command (arg, from_tty)
978 struct command_line *command = NULL;
981 command = get_command_line (while_control, arg);
986 execute_control_command (command);
987 free_command_lines (&command);
990 /* "if" command support. Execute either the true or false arm depending
991 on the value of the if conditional. */
994 if_command (arg, from_tty)
998 struct command_line *command = NULL;
1001 command = get_command_line (if_control, arg);
1003 if (command == NULL)
1006 execute_control_command (command);
1007 free_command_lines (&command);
1014 struct user_args *oargs = user_args;
1016 fatal ("Internal error, arg_cleanup called with no user args.\n");
1018 user_args = user_args->next;
1022 /* Bind the incomming arguments for a user defined command to
1023 $arg0, $arg1 ... $argMAXUSERARGS. */
1025 static struct cleanup *
1029 struct user_args *args;
1030 struct cleanup *old_chain;
1031 unsigned int arg_count = 0;
1033 args = (struct user_args *)xmalloc (sizeof (struct user_args));
1034 memset (args, 0, sizeof (struct user_args));
1036 args->next = user_args;
1039 old_chain = make_cleanup ((make_cleanup_func) arg_cleanup, 0);
1051 if (arg_count >= MAXUSERARGS)
1053 error ("user defined function may only have %d arguments.\n",
1058 /* Strip whitespace. */
1059 while (*p == ' ' || *p == '\t')
1062 /* P now points to an argument. */
1064 user_args->a[arg_count].arg = p;
1066 /* Get to the end of this argument. */
1069 if (((*p == ' ' || *p == '\t')) && !squote && !dquote && !bsquote)
1075 else if (*p == '\\')
1098 user_args->a[arg_count].len = p - start_arg;
1105 /* Given character string P, return a point to the first argument ($arg),
1106 or NULL if P contains no arguments. */
1112 while ((p = strchr (p, '$')))
1114 if (strncmp (p, "$arg", 4) == 0 && isdigit (p[4]))
1121 /* Insert the user defined arguments stored in user_arg into the $arg
1122 arguments found in line, with the updated copy being placed into nline. */
1128 char *p, *save_line, *new_line;
1131 /* First we need to know how much memory to allocate for the new line. */
1134 while ((p = locate_arg (line)))
1139 if (i >= user_args->count)
1141 error ("Missing argument %d in user function.\n", i);
1144 len += user_args->a[i].len;
1148 /* Don't forget the tail. */
1149 len += strlen (line);
1151 /* Allocate space for the new line and fill it in. */
1152 new_line = (char *)xmalloc (len + 1);
1153 if (new_line == NULL)
1156 /* Restore pointer to beginning of old line. */
1159 /* Save pointer to beginning of new line. */
1160 save_line = new_line;
1162 while ((p = locate_arg (line)))
1166 memcpy (new_line, line, p - line);
1167 new_line += p - line;
1170 len = user_args->a[i].len;
1173 memcpy (new_line, user_args->a[i].arg, len);
1178 /* Don't forget the tail. */
1179 strcpy (new_line, line);
1181 /* Return a pointer to the beginning of the new line. */
1186 execute_user_command (c, args)
1187 struct cmd_list_element *c;
1190 register struct command_line *cmdlines;
1191 struct cleanup *old_chain;
1192 enum command_control_type ret;
1194 old_chain = setup_user_args (args);
1196 cmdlines = c->user_commands;
1201 /* Set the instream to 0, indicating execution of a
1202 user-defined function. */
1203 old_chain = make_cleanup ((make_cleanup_func) source_cleanup, instream);
1204 instream = (FILE *) 0;
1207 ret = execute_control_command (cmdlines);
1208 if (ret != simple_control && ret != break_control)
1210 warning ("Error in control structure.\n");
1213 cmdlines = cmdlines->next;
1215 do_cleanups (old_chain);
1218 /* Execute the line P as a command.
1219 Pass FROM_TTY as second argument to the defining function. */
1222 execute_command (p, from_tty)
1226 register struct cmd_list_element *c;
1227 register enum language flang;
1228 static int warned = 0;
1229 /* FIXME: These should really be in an appropriate header file */
1230 extern void serial_log_command PARAMS ((const char *));
1234 /* Force cleanup of any alloca areas if using C alloca instead of
1235 a builtin alloca. */
1238 /* This can happen when command_line_input hits end of file. */
1242 serial_log_command (p);
1244 while (*p == ' ' || *p == '\t') p++;
1249 c = lookup_cmd (&p, cmdlist, "", 0, 1);
1250 /* Pass null arg rather than an empty one. */
1253 /* Clear off trailing whitespace, except for set and complete command. */
1254 if (arg && c->type != set_cmd && c->function.cfunc != complete_command)
1256 p = arg + strlen (arg) - 1;
1257 while (p >= arg && (*p == ' ' || *p == '\t'))
1262 /* If this command has been hooked, run the hook first. */
1264 execute_user_command (c->hook, (char *)0);
1266 if (c->class == class_user)
1267 execute_user_command (c, arg);
1268 else if (c->type == set_cmd || c->type == show_cmd)
1269 do_setshow_command (arg, from_tty & caution, c);
1270 else if (c->function.cfunc == NO_FUNCTION)
1271 error ("That is not a command, just a help topic.");
1272 else if (call_command_hook)
1273 call_command_hook (c, arg, from_tty & caution);
1275 (*c->function.cfunc) (arg, from_tty & caution);
1278 /* Tell the user if the language has changed (except first time). */
1279 if (current_language != expected_language)
1281 if (language_mode == language_mode_auto) {
1282 language_info (1); /* Print what changed. */
1287 /* Warn the user if the working language does not match the
1288 language of the current frame. Only warn the user if we are
1289 actually running the program, i.e. there is a stack. */
1290 /* FIXME: This should be cacheing the frame and only running when
1291 the frame changes. */
1293 if (target_has_stack)
1295 flang = get_frame_language ();
1297 && flang != language_unknown
1298 && flang != current_language->la_language)
1300 printf_filtered ("%s\n", lang_frame_mismatch_warn);
1308 command_loop_marker (foo)
1313 /* Read commands from `instream' and execute them
1314 until end of file or error reading instream. */
1319 struct cleanup *old_chain;
1321 int stdin_is_tty = ISATTY (stdin);
1322 long time_at_cmd_start;
1324 long space_at_cmd_start;
1326 extern int display_time;
1327 extern int display_space;
1329 while (instream && !feof (instream))
1331 if (window_hook && instream == stdin)
1332 (*window_hook) (instream, prompt);
1335 if (instream == stdin && stdin_is_tty)
1336 reinitialize_more_filter ();
1337 old_chain = make_cleanup ((make_cleanup_func) command_loop_marker, 0);
1338 command = command_line_input (instream == stdin ? prompt : (char *) NULL,
1339 instream == stdin, "prompt");
1343 time_at_cmd_start = get_run_time ();
1348 extern char **environ;
1349 char *lim = (char *) sbrk (0);
1351 space_at_cmd_start = (long) (lim - (char *) &environ);
1355 execute_command (command, instream == stdin);
1356 /* Do any commands attached to breakpoint we stopped at. */
1357 bpstat_do_actions (&stop_bpstat);
1358 do_cleanups (old_chain);
1362 long cmd_time = get_run_time () - time_at_cmd_start;
1364 printf_unfiltered ("Command execution time: %ld.%06ld\n",
1365 cmd_time / 1000000, cmd_time % 1000000);
1371 extern char **environ;
1372 char *lim = (char *) sbrk (0);
1373 long space_now = lim - (char *) &environ;
1374 long space_diff = space_now - space_at_cmd_start;
1376 printf_unfiltered ("Space used: %ld (%c%ld for this command)\n",
1378 (space_diff >= 0 ? '+' : '-'),
1385 /* Commands call this if they do not want to be repeated by null lines. */
1393 /* If we aren't reading from standard input, we are saving the last
1394 thing read from stdin in line and don't want to delete it. Null lines
1395 won't repeat here in any case. */
1396 if (instream == stdin)
1400 /* Read a line from the stream "instream" without command line editing.
1402 It prints PRROMPT once at the start.
1403 Action is compatible with "readline", e.g. space for the result is
1404 malloc'd and should be freed by the caller.
1406 A NULL return means end of file. */
1408 gdb_readline (prrompt)
1413 int input_index = 0;
1414 int result_size = 80;
1418 /* Don't use a _filtered function here. It causes the assumed
1419 character position to be off, since the newline we read from
1420 the user is not accounted for. */
1421 fputs_unfiltered (prrompt, gdb_stdout);
1423 /* Move to a new line so the entered line doesn't have a prompt
1424 on the front of it. */
1425 fputs_unfiltered ("\n", gdb_stdout);
1427 gdb_flush (gdb_stdout);
1430 result = (char *) xmalloc (result_size);
1434 /* Read from stdin if we are executing a user defined command.
1435 This is the right thing for prompt_for_continue, at least. */
1436 c = fgetc (instream ? instream : stdin);
1440 if (input_index > 0)
1441 /* The last line does not end with a newline. Return it, and
1442 if we are called again fgetc will still return EOF and
1443 we'll return NULL then. */
1450 #ifndef CRLF_SOURCE_FILES
1454 if (input_index > 0 && result[input_index - 1] == '\r')
1460 result[input_index++] = c;
1461 while (input_index >= result_size)
1464 result = (char *) xrealloc (result, result_size);
1468 result[input_index++] = '\0';
1472 /* Variables which control command line editing and history
1473 substitution. These variables are given default values at the end
1475 static int command_editing_p;
1476 static int history_expansion_p;
1477 static int write_history_p;
1478 static int history_size;
1479 static char *history_filename;
1481 /* readline uses the word breaks for two things:
1482 (1) In figuring out where to point the TEXT parameter to the
1483 rl_completion_entry_function. Since we don't use TEXT for much,
1484 it doesn't matter a lot what the word breaks are for this purpose, but
1485 it does affect how much stuff M-? lists.
1486 (2) If one of the matches contains a word break character, readline
1487 will quote it. That's why we switch between
1488 gdb_completer_word_break_characters and
1489 gdb_completer_command_word_break_characters. I'm not sure when
1490 we need this behavior (perhaps for funky characters in C++ symbols?). */
1492 /* Variables which are necessary for fancy command line editing. */
1493 char *gdb_completer_word_break_characters =
1494 " \t\n!@#$%^&*()+=|~`}{[]\"';:?/>.<,-";
1496 /* When completing on command names, we remove '-' from the list of
1497 word break characters, since we use it in command names. If the
1498 readline library sees one in any of the current completion strings,
1499 it thinks that the string needs to be quoted and automatically supplies
1501 char *gdb_completer_command_word_break_characters =
1502 " \t\n!@#$%^&*()+=|~`}{[]\"';:?/>.<,";
1504 /* Characters that can be used to quote completion strings. Note that we
1505 can't include '"' because the gdb C parser treats such quoted sequences
1507 char *gdb_completer_quote_characters =
1510 /* Functions that are used as part of the fancy command line editing. */
1512 /* This can be used for functions which don't want to complete on symbols
1513 but don't want to complete on anything else either. */
1516 noop_completer (text, prefix)
1523 /* Complete on filenames. */
1525 filename_completer (text, word)
1529 /* From readline. */
1530 extern char *filename_completion_function PARAMS ((char *, int));
1531 int subsequent_name;
1533 int return_val_used;
1534 int return_val_alloced;
1536 return_val_used = 0;
1537 /* Small for testing. */
1538 return_val_alloced = 1;
1539 return_val = (char **) xmalloc (return_val_alloced * sizeof (char *));
1541 subsequent_name = 0;
1545 p = filename_completion_function (text, subsequent_name);
1546 if (return_val_used >= return_val_alloced)
1548 return_val_alloced *= 2;
1550 (char **) xrealloc (return_val,
1551 return_val_alloced * sizeof (char *));
1555 return_val[return_val_used++] = p;
1558 /* Like emacs, don't complete on old versions. Especially useful
1559 in the "source" command. */
1560 if (p[strlen (p) - 1] == '~')
1566 /* Return exactly p. */
1567 return_val[return_val_used++] = p;
1568 else if (word > text)
1570 /* Return some portion of p. */
1571 q = xmalloc (strlen (p) + 5);
1572 strcpy (q, p + (word - text));
1573 return_val[return_val_used++] = q;
1578 /* Return some of TEXT plus p. */
1579 q = xmalloc (strlen (p) + (text - word) + 5);
1580 strncpy (q, word, text - word);
1581 q[text - word] = '\0';
1583 return_val[return_val_used++] = q;
1587 subsequent_name = 1;
1590 /* There is no way to do this just long enough to affect quote inserting
1591 without also affecting the next completion. This should be fixed in
1593 /* Insure that readline does the right thing
1594 with respect to inserting quotes. */
1595 rl_completer_word_break_characters = "";
1600 /* Here are some useful test cases for completion. FIXME: These should
1601 be put in the test suite. They should be tested with both M-? and TAB.
1603 "show output-" "radix"
1604 "show output" "-radix"
1605 "p" ambiguous (commands starting with p--path, print, printf, etc.)
1606 "p " ambiguous (all symbols)
1607 "info t foo" no completions
1608 "info t " no completions
1609 "info t" ambiguous ("info target", "info terminal", etc.)
1610 "info ajksdlfk" no completions
1611 "info ajksdlfk " no completions
1613 "info " ambiguous (all info commands)
1614 "p \"a" no completions (string constant)
1615 "p 'a" ambiguous (all symbols starting with a)
1616 "p b-a" ambiguous (all symbols starting with a)
1617 "p b-" ambiguous (all symbols)
1618 "file Make" "file" (word break hard to screw up here)
1619 "file ../gdb.stabs/we" "ird" (needs to not break word at slash)
1622 /* Generate completions one by one for the completer. Each time we are
1623 called return another potential completion to the caller.
1624 line_completion just completes on commands or passes the buck to the
1625 command's completer function, the stuff specific to symbol completion
1626 is in make_symbol_completion_list.
1628 TEXT is the caller's idea of the "word" we are looking at.
1630 MATCHES is the number of matches that have currently been collected from
1631 calling this completion function. When zero, then we need to initialize,
1632 otherwise the initialization has already taken place and we can just
1633 return the next potential completion string.
1635 LINE_BUFFER is available to be looked at; it contains the entire text
1636 of the line. POINT is the offset in that line of the cursor. You
1637 should pretend that the line ends at POINT.
1639 Returns NULL if there are no more completions, else a pointer to a string
1640 which is a possible completion, it is the caller's responsibility to
1644 line_completion_function (text, matches, line_buffer, point)
1650 static char **list = (char **)NULL; /* Cache of completions */
1651 static int index; /* Next cached completion */
1652 char *output = NULL;
1653 char *tmp_command, *p;
1654 /* Pointer within tmp_command which corresponds to text. */
1656 struct cmd_list_element *c, *result_list;
1660 /* The caller is beginning to accumulate a new set of completions, so
1661 we need to find all of them now, and cache them for returning one at
1662 a time on future calls. */
1666 /* Free the storage used by LIST, but not by the strings inside.
1667 This is because rl_complete_internal () frees the strings. */
1673 /* Choose the default set of word break characters to break completions.
1674 If we later find out that we are doing completions on command strings
1675 (as opposed to strings supplied by the individual command completer
1676 functions, which can be any string) then we will switch to the
1677 special word break set for command strings, which leaves out the
1678 '-' character used in some commands. */
1680 rl_completer_word_break_characters =
1681 gdb_completer_word_break_characters;
1683 /* Decide whether to complete on a list of gdb commands or on symbols. */
1684 tmp_command = (char *) alloca (point + 1);
1687 strncpy (tmp_command, line_buffer, point);
1688 tmp_command[point] = '\0';
1689 /* Since text always contains some number of characters leading up
1690 to point, we can find the equivalent position in tmp_command
1691 by subtracting that many characters from the end of tmp_command. */
1692 word = tmp_command + point - strlen (text);
1696 /* An empty line we want to consider ambiguous; that is, it
1697 could be any command. */
1698 c = (struct cmd_list_element *) -1;
1703 c = lookup_cmd_1 (&p, cmdlist, &result_list, 1);
1706 /* Move p up to the next interesting thing. */
1707 while (*p == ' ' || *p == '\t')
1714 /* It is an unrecognized command. So there are no
1715 possible completions. */
1718 else if (c == (struct cmd_list_element *) -1)
1722 /* lookup_cmd_1 advances p up to the first ambiguous thing, but
1723 doesn't advance over that thing itself. Do so now. */
1725 while (*q && (isalnum (*q) || *q == '-' || *q == '_'))
1727 if (q != tmp_command + point)
1729 /* There is something beyond the ambiguous
1730 command, so there are no possible completions. For
1731 example, "info t " or "info t foo" does not complete
1732 to anything, because "info t" can be "info target" or
1738 /* We're trying to complete on the command which was ambiguous.
1739 This we can deal with. */
1742 list = complete_on_cmdlist (*result_list->prefixlist, p,
1747 list = complete_on_cmdlist (cmdlist, p, word);
1749 /* Insure that readline does the right thing with respect to
1750 inserting quotes. */
1751 rl_completer_word_break_characters =
1752 gdb_completer_command_word_break_characters;
1757 /* We've recognized a full command. */
1759 if (p == tmp_command + point)
1761 /* There is no non-whitespace in the line beyond the command. */
1763 if (p[-1] == ' ' || p[-1] == '\t')
1765 /* The command is followed by whitespace; we need to complete
1766 on whatever comes after command. */
1769 /* It is a prefix command; what comes after it is
1770 a subcommand (e.g. "info "). */
1771 list = complete_on_cmdlist (*c->prefixlist, p, word);
1773 /* Insure that readline does the right thing
1774 with respect to inserting quotes. */
1775 rl_completer_word_break_characters =
1776 gdb_completer_command_word_break_characters;
1780 list = complete_on_enum (c->enums, p, word);
1781 rl_completer_word_break_characters =
1782 gdb_completer_command_word_break_characters;
1786 /* It is a normal command; what comes after it is
1787 completed by the command's completer function. */
1788 list = (*c->completer) (p, word);
1793 /* The command is not followed by whitespace; we need to
1794 complete on the command itself. e.g. "p" which is a
1795 command itself but also can complete to "print", "ptype"
1799 /* Find the command we are completing on. */
1801 while (q > tmp_command)
1803 if (isalnum (q[-1]) || q[-1] == '-' || q[-1] == '_')
1809 list = complete_on_cmdlist (result_list, q, word);
1811 /* Insure that readline does the right thing
1812 with respect to inserting quotes. */
1813 rl_completer_word_break_characters =
1814 gdb_completer_command_word_break_characters;
1819 /* There is non-whitespace beyond the command. */
1821 if (c->prefixlist && !c->allow_unknown)
1823 /* It is an unrecognized subcommand of a prefix command,
1824 e.g. "info adsfkdj". */
1829 list = complete_on_enum (c->enums, p, word);
1833 /* It is a normal command. */
1834 list = (*c->completer) (p, word);
1840 /* If we found a list of potential completions during initialization then
1841 dole them out one at a time. The vector of completions is NULL
1842 terminated, so after returning the last one, return NULL (and continue
1843 to do so) each time we are called after that, until a new list is
1848 output = list[index];
1856 /* Can't do this because readline hasn't yet checked the word breaks
1857 for figuring out whether to insert a quote. */
1859 /* Make sure the word break characters are set back to normal for the
1860 next time that readline tries to complete something. */
1861 rl_completer_word_break_characters =
1862 gdb_completer_word_break_characters;
1868 /* Line completion interface function for readline. */
1871 readline_line_completion_function (text, matches)
1875 return line_completion_function (text, matches, rl_line_buffer, rl_point);
1878 /* Skip over a possibly quoted word (as defined by the quote characters
1879 and word break characters the completer uses). Returns pointer to the
1880 location after the "word". */
1886 char quote_char = '\0';
1889 for (scan = str; *scan != '\0'; scan++)
1891 if (quote_char != '\0')
1893 /* Ignore everything until the matching close quote char */
1894 if (*scan == quote_char)
1896 /* Found matching close quote. */
1901 else if (strchr (gdb_completer_quote_characters, *scan))
1903 /* Found start of a quoted string. */
1906 else if (strchr (gdb_completer_word_break_characters, *scan))
1920 #if STOP_SIGNAL == SIGTSTP
1921 signal (SIGTSTP, SIG_DFL);
1923 kill (getpid (), SIGTSTP);
1924 signal (SIGTSTP, stop_sig);
1926 signal (STOP_SIGNAL, stop_sig);
1928 printf_unfiltered ("%s", prompt);
1929 gdb_flush (gdb_stdout);
1931 /* Forget about any previous command -- null line now will do nothing. */
1934 #endif /* STOP_SIGNAL */
1936 /* Initialize signal handlers. */
1941 /* Under System V the default disposition of a signal is reinstated after
1942 the signal is caught and delivered to an application process. On such
1943 systems one must restore the replacement signal handler if one wishes
1944 to continue handling the signal in one's program. On BSD systems this
1945 is not needed but it is harmless, and it simplifies the code to just do
1946 it unconditionally. */
1947 signal (signo, do_nothing);
1953 signal (SIGINT, request_quit);
1955 /* If SIGTRAP was set to SIG_IGN, then the SIG_IGN will get passed
1956 to the inferior and breakpoints will be ignored. */
1958 signal (SIGTRAP, SIG_DFL);
1961 /* If we initialize SIGQUIT to SIG_IGN, then the SIG_IGN will get
1962 passed to the inferior, which we don't want. It would be
1963 possible to do a "signal (SIGQUIT, SIG_DFL)" after we fork, but
1964 on BSD4.3 systems using vfork, that can affect the
1965 GDB process as well as the inferior (the signal handling tables
1966 might be in memory, shared between the two). Since we establish
1967 a handler for SIGQUIT, when we call exec it will set the signal
1968 to SIG_DFL for us. */
1969 signal (SIGQUIT, do_nothing);
1971 if (signal (SIGHUP, do_nothing) != SIG_IGN)
1972 signal (SIGHUP, disconnect);
1974 signal (SIGFPE, float_handler);
1976 #if defined(SIGWINCH) && defined(SIGWINCH_HANDLER)
1977 signal (SIGWINCH, SIGWINCH_HANDLER);
1981 /* Read one line from the command input stream `instream'
1982 into the local static buffer `linebuffer' (whose current length
1984 The buffer is made bigger as necessary.
1985 Returns the address of the start of the line.
1987 NULL is returned for end of file.
1989 *If* the instream == stdin & stdin is a terminal, the line read
1990 is copied into the file line saver (global var char *line,
1991 length linesize) so that it can be duplicated.
1993 This routine either uses fancy command line editing or
1994 simple input as the user has requested. */
1997 command_line_input (prrompt, repeat, annotation_suffix)
2000 char *annotation_suffix;
2002 static char *linebuffer = 0;
2003 static unsigned linelength = 0;
2007 char *local_prompt = prrompt;
2011 /* The annotation suffix must be non-NULL. */
2012 if (annotation_suffix == NULL)
2013 annotation_suffix = "";
2015 if (annotation_level > 1 && instream == stdin)
2017 local_prompt = alloca ((prrompt == NULL ? 0 : strlen (prrompt))
2018 + strlen (annotation_suffix) + 40);
2019 if (prrompt == NULL)
2020 local_prompt[0] = '\0';
2022 strcpy (local_prompt, prrompt);
2023 strcat (local_prompt, "\n\032\032");
2024 strcat (local_prompt, annotation_suffix);
2025 strcat (local_prompt, "\n");
2028 if (linebuffer == 0)
2031 linebuffer = (char *) xmalloc (linelength);
2036 /* Control-C quits instantly if typed while in this loop
2037 since it should not wait until the user types a newline. */
2041 signal (STOP_SIGNAL, stop_sig);
2046 /* Make sure that all output has been output. Some machines may let
2047 you get away with leaving out some of the gdb_flush, but not all. */
2049 gdb_flush (gdb_stdout);
2050 gdb_flush (gdb_stderr);
2052 if (source_file_name != NULL)
2054 ++source_line_number;
2055 sprintf (source_error,
2056 "%s%s:%d: Error in sourced command file:\n",
2059 source_line_number);
2060 error_pre_print = source_error;
2063 if (annotation_level > 1 && instream == stdin)
2065 printf_unfiltered ("\n\032\032pre-");
2066 printf_unfiltered (annotation_suffix);
2067 printf_unfiltered ("\n");
2070 /* Don't use fancy stuff if not talking to stdin. */
2071 if (readline_hook && instream == NULL)
2073 rl = (*readline_hook) (local_prompt);
2075 else if (command_editing_p && instream == stdin && ISATTY (instream))
2077 rl = readline (local_prompt);
2081 rl = gdb_readline (local_prompt);
2084 if (annotation_level > 1 && instream == stdin)
2086 printf_unfiltered ("\n\032\032post-");
2087 printf_unfiltered (annotation_suffix);
2088 printf_unfiltered ("\n");
2091 if (!rl || rl == (char *) EOF)
2096 if (strlen(rl) + 1 + (p - linebuffer) > linelength)
2098 linelength = strlen(rl) + 1 + (p - linebuffer);
2099 nline = (char *) xrealloc (linebuffer, linelength);
2100 p += nline - linebuffer;
2104 /* Copy line. Don't copy null at end. (Leaves line alone
2105 if this was just a newline) */
2109 free (rl); /* Allocated in readline. */
2111 if (p == linebuffer || *(p - 1) != '\\')
2114 p--; /* Put on top of '\'. */
2115 local_prompt = (char *) 0;
2120 signal (STOP_SIGNAL, SIG_DFL);
2127 #define SERVER_COMMAND_LENGTH 7
2129 (p - linebuffer > SERVER_COMMAND_LENGTH)
2130 && STREQN (linebuffer, "server ", SERVER_COMMAND_LENGTH);
2133 /* Note that we don't set `line'. Between this and the check in
2134 dont_repeat, this insures that repeating will still do the
2137 return linebuffer + SERVER_COMMAND_LENGTH;
2140 /* Do history expansion if that is wished. */
2141 if (history_expansion_p && instream == stdin
2142 && ISATTY (instream))
2144 char *history_value;
2147 *p = '\0'; /* Insert null now. */
2148 expanded = history_expand (linebuffer, &history_value);
2151 /* Print the changes. */
2152 printf_unfiltered ("%s\n", history_value);
2154 /* If there was an error, call this function again. */
2157 free (history_value);
2158 return command_line_input (prrompt, repeat, annotation_suffix);
2160 if (strlen (history_value) > linelength)
2162 linelength = strlen (history_value) + 1;
2163 linebuffer = (char *) xrealloc (linebuffer, linelength);
2165 strcpy (linebuffer, history_value);
2166 p = linebuffer + strlen(linebuffer);
2167 free (history_value);
2171 /* If we just got an empty line, and that is supposed
2172 to repeat the previous command, return the value in the
2174 if (repeat && p == linebuffer)
2176 for (p1 = linebuffer; *p1 == ' ' || *p1 == '\t'; p1++) ;
2182 /* Add line to history if appropriate. */
2183 if (instream == stdin
2184 && ISATTY (stdin) && *linebuffer)
2185 add_history (linebuffer);
2187 /* Note: lines consisting solely of comments are added to the command
2188 history. This is useful when you type a command, and then
2189 realize you don't want to execute it quite yet. You can comment
2190 out the command and then later fetch it from the value history
2191 and remove the '#'. The kill ring is probably better, but some
2192 people are in the habit of commenting things out. */
2194 *p1 = '\0'; /* Found a comment. */
2196 /* Save into global buffer if appropriate. */
2199 if (linelength > linesize)
2201 line = xrealloc (line, linelength);
2202 linesize = linelength;
2204 strcpy (line, linebuffer);
2212 /* Expand the body_list of COMMAND so that it can hold NEW_LENGTH
2213 code bodies. This is typically used when we encounter an "else"
2214 clause for an "if" command. */
2217 realloc_body_list (command, new_length)
2218 struct command_line *command;
2222 struct command_line **body_list;
2224 n = command->body_count;
2226 /* Nothing to do? */
2227 if (new_length <= n)
2230 body_list = (struct command_line **)
2231 xmalloc (sizeof (struct command_line *) * new_length);
2233 memcpy (body_list, command->body_list, sizeof (struct command_line *) * n);
2235 free (command->body_list);
2236 command->body_list = body_list;
2237 command->body_count = new_length;
2240 /* Read one line from the input stream. If the command is an "else" or
2241 "end", return such an indication to the caller. */
2243 static enum misc_command_type
2244 read_next_line (command)
2245 struct command_line **command;
2247 char *p, *p1, *prompt_ptr, control_prompt[256];
2250 if (control_level >= 254)
2251 error ("Control nesting too deep!\n");
2253 /* Set a prompt based on the nesting of the control commands. */
2254 if (instream == stdin || (instream == 0 && readline_hook != NULL))
2256 for (i = 0; i < control_level; i++)
2257 control_prompt[i] = ' ';
2258 control_prompt[i] = '>';
2259 control_prompt[i+1] = '\0';
2260 prompt_ptr = (char *)&control_prompt[0];
2265 p = command_line_input (prompt_ptr, instream == stdin, "commands");
2267 /* Not sure what to do here. */
2271 /* Strip leading and trailing whitespace. */
2272 while (*p == ' ' || *p == '\t')
2275 p1 = p + strlen (p);
2276 while (p1 != p && (p1[-1] == ' ' || p1[-1] == '\t'))
2279 /* Blanks and comments don't really do anything, but we need to
2280 distinguish them from else, end and other commands which can be
2282 if (p1 == p || p[0] == '#')
2285 /* Is this the end of a simple, while, or if control structure? */
2286 if (p1 - p == 3 && !strncmp (p, "end", 3))
2289 /* Is the else clause of an if control structure? */
2290 if (p1 - p == 4 && !strncmp (p, "else", 4))
2291 return else_command;
2293 /* Check for while, if, break, continue, etc and build a new command
2294 line structure for them. */
2295 if (p1 - p > 5 && !strncmp (p, "while", 5))
2296 *command = build_command_line (while_control, p + 6);
2297 else if (p1 - p > 2 && !strncmp (p, "if", 2))
2298 *command = build_command_line (if_control, p + 3);
2299 else if (p1 - p == 10 && !strncmp (p, "loop_break", 10))
2301 *command = (struct command_line *)
2302 xmalloc (sizeof (struct command_line));
2303 (*command)->next = NULL;
2304 (*command)->line = NULL;
2305 (*command)->control_type = break_control;
2306 (*command)->body_count = 0;
2307 (*command)->body_list = NULL;
2309 else if (p1 - p == 13 && !strncmp (p, "loop_continue", 13))
2311 *command = (struct command_line *)
2312 xmalloc (sizeof (struct command_line));
2313 (*command)->next = NULL;
2314 (*command)->line = NULL;
2315 (*command)->control_type = continue_control;
2316 (*command)->body_count = 0;
2317 (*command)->body_list = NULL;
2321 /* A normal command. */
2322 *command = (struct command_line *)
2323 xmalloc (sizeof (struct command_line));
2324 (*command)->next = NULL;
2325 (*command)->line = savestring (p, p1 - p);
2326 (*command)->control_type = simple_control;
2327 (*command)->body_count = 0;
2328 (*command)->body_list = NULL;
2331 /* Nothing special. */
2335 /* Recursively read in the control structures and create a command_line
2336 structure from them.
2338 The parent_control parameter is the control structure in which the
2339 following commands are nested. */
2341 static enum command_control_type
2342 recurse_read_control_structure (current_cmd)
2343 struct command_line *current_cmd;
2345 int current_body, i;
2346 enum misc_command_type val;
2347 enum command_control_type ret;
2348 struct command_line **body_ptr, *child_tail, *next;
2353 /* Sanity checks. */
2354 if (current_cmd->control_type == simple_control)
2356 error ("Recursed on a simple control type\n");
2357 return invalid_control;
2360 if (current_body > current_cmd->body_count)
2362 error ("Allocated body is smaller than this command type needs\n");
2363 return invalid_control;
2366 /* Read lines from the input stream and build control structures. */
2372 val = read_next_line (&next);
2374 /* Just skip blanks and comments. */
2375 if (val == nop_command)
2378 if (val == end_command)
2380 if (current_cmd->control_type == while_control
2381 || current_cmd->control_type == if_control)
2383 /* Success reading an entire control structure. */
2384 ret = simple_control;
2389 ret = invalid_control;
2394 /* Not the end of a control structure. */
2395 if (val == else_command)
2397 if (current_cmd->control_type == if_control
2398 && current_body == 1)
2400 realloc_body_list (current_cmd, 2);
2407 ret = invalid_control;
2414 child_tail->next = next;
2418 body_ptr = current_cmd->body_list;
2419 for (i = 1; i < current_body; i++)
2428 /* If the latest line is another control structure, then recurse
2430 if (next->control_type == while_control
2431 || next->control_type == if_control)
2434 ret = recurse_read_control_structure (next);
2437 if (ret != simple_control)
2447 /* Read lines from the input stream and accumulate them in a chain of
2448 struct command_line's, which is then returned. For input from a
2449 terminal, the special command "end" is used to mark the end of the
2450 input, and is not included in the returned chain of commands. */
2452 #define END_MESSAGE "End with a line saying just \"end\"."
2454 struct command_line *
2455 read_command_lines (prompt, from_tty)
2459 struct command_line *head, *tail, *next;
2460 struct cleanup *old_chain;
2461 enum command_control_type ret;
2462 enum misc_command_type val;
2464 if (readline_begin_hook)
2466 /* Note - intentional to merge messages with no newline */
2467 (*readline_begin_hook) ("%s %s\n", prompt, END_MESSAGE);
2469 else if (from_tty && input_from_terminal_p ())
2471 printf_unfiltered ("%s\n%s\n", prompt, END_MESSAGE);
2472 gdb_flush (gdb_stdout);
2480 val = read_next_line (&next);
2482 /* Ignore blank lines or comments. */
2483 if (val == nop_command)
2486 if (val == end_command)
2488 ret = simple_control;
2492 if (val != ok_command)
2494 ret = invalid_control;
2498 if (next->control_type == while_control
2499 || next->control_type == if_control)
2502 ret = recurse_read_control_structure (next);
2505 if (ret == invalid_control)
2516 old_chain = make_cleanup ((make_cleanup_func) free_command_lines,
2526 if (ret != invalid_control)
2528 discard_cleanups (old_chain);
2531 do_cleanups (old_chain);
2534 if (readline_end_hook)
2536 (*readline_end_hook) ();
2541 /* Free a chain of struct command_line's. */
2544 free_command_lines (lptr)
2545 struct command_line **lptr;
2547 register struct command_line *l = *lptr;
2548 register struct command_line *next;
2549 struct command_line **blist;
2554 if (l->body_count > 0)
2556 blist = l->body_list;
2557 for (i = 0; i < l->body_count; i++, blist++)
2558 free_command_lines (blist);
2567 /* Add an element to the list of info subcommands. */
2570 add_info (name, fun, doc)
2572 void (*fun) PARAMS ((char *, int));
2575 add_cmd (name, no_class, fun, doc, &infolist);
2578 /* Add an alias to the list of info subcommands. */
2581 add_info_alias (name, oldname, abbrev_flag)
2586 add_alias_cmd (name, oldname, 0, abbrev_flag, &infolist);
2589 /* The "info" command is defined as a prefix, with allow_unknown = 0.
2590 Therefore, its own definition is called only for "info" with no args. */
2594 info_command (arg, from_tty)
2598 printf_unfiltered ("\"info\" must be followed by the name of an info command.\n");
2599 help_list (infolist, "info ", -1, gdb_stdout);
2602 /* The "complete" command is used by Emacs to implement completion. */
2606 complete_command (arg, from_tty)
2618 argpoint = strlen (arg);
2620 for (completion = line_completion_function (arg, i = 0, arg, argpoint);
2622 completion = line_completion_function (arg, ++i, arg, argpoint))
2624 printf_unfiltered ("%s\n", completion);
2629 /* The "show" command with no arguments shows all the settings. */
2633 show_command (arg, from_tty)
2637 cmd_show_list (showlist, from_tty, "");
2640 /* Add an element to the list of commands. */
2643 add_com (name, class, fun, doc)
2645 enum command_class class;
2646 void (*fun) PARAMS ((char *, int));
2649 add_cmd (name, class, fun, doc, &cmdlist);
2652 /* Add an alias or abbreviation command to the list of commands. */
2655 add_com_alias (name, oldname, class, abbrev_flag)
2658 enum command_class class;
2661 add_alias_cmd (name, oldname, class, abbrev_flag, &cmdlist);
2668 error ("Argument required (%s).", why);
2673 help_command (command, from_tty)
2675 int from_tty; /* Ignored */
2677 help_cmd (command, gdb_stdout);
2681 validate_comname (comname)
2687 error_no_arg ("name of command to define");
2692 if (!isalnum(*p) && *p != '-' && *p != '_')
2693 error ("Junk in argument list: \"%s\"", p);
2698 /* This is just a placeholder in the command data structures. */
2700 user_defined_command (ignore, from_tty)
2707 define_command (comname, from_tty)
2711 register struct command_line *cmds;
2712 register struct cmd_list_element *c, *newc, *hookc = 0;
2713 char *tem = comname;
2715 #define HOOK_STRING "hook-"
2718 validate_comname (comname);
2720 /* Look it up, and verify that we got an exact match. */
2721 c = lookup_cmd (&tem, cmdlist, "", -1, 1);
2722 if (c && !STREQ (comname, c->name))
2727 if (c->class == class_user || c->class == class_alias)
2728 tem = "Redefine command \"%s\"? ";
2730 tem = "Really redefine built-in command \"%s\"? ";
2731 if (!query (tem, c->name))
2732 error ("Command \"%s\" not redefined.", c->name);
2735 /* If this new command is a hook, then mark the command which it
2736 is hooking. Note that we allow hooking `help' commands, so that
2737 we can hook the `stop' pseudo-command. */
2739 if (!strncmp (comname, HOOK_STRING, HOOK_LEN))
2741 /* Look up cmd it hooks, and verify that we got an exact match. */
2742 tem = comname+HOOK_LEN;
2743 hookc = lookup_cmd (&tem, cmdlist, "", -1, 0);
2744 if (hookc && !STREQ (comname+HOOK_LEN, hookc->name))
2748 warning ("Your new `%s' command does not hook any existing command.",
2750 if (!query ("Proceed? "))
2751 error ("Not confirmed.");
2755 comname = savestring (comname, strlen (comname));
2757 /* If the rest of the commands will be case insensitive, this one
2758 should behave in the same manner. */
2759 for (tem = comname; *tem; tem++)
2760 if (isupper(*tem)) *tem = tolower(*tem);
2763 sprintf (tmpbuf, "Type commands for definition of \"%s\".", comname);
2764 cmds = read_command_lines (tmpbuf, from_tty);
2766 if (c && c->class == class_user)
2767 free_command_lines (&c->user_commands);
2769 newc = add_cmd (comname, class_user, user_defined_command,
2770 (c && c->class == class_user)
2771 ? c->doc : savestring ("User-defined.", 13), &cmdlist);
2772 newc->user_commands = cmds;
2774 /* If this new command is a hook, then mark both commands as being
2778 hookc->hook = newc; /* Target gets hooked. */
2779 newc->hookee = hookc; /* We are marked as hooking target cmd. */
2784 document_command (comname, from_tty)
2788 struct command_line *doclines;
2789 register struct cmd_list_element *c;
2790 char *tem = comname;
2793 validate_comname (comname);
2795 c = lookup_cmd (&tem, cmdlist, "", 0, 1);
2797 if (c->class != class_user)
2798 error ("Command \"%s\" is built-in.", comname);
2800 sprintf (tmpbuf, "Type documentation for \"%s\".", comname);
2801 doclines = read_command_lines (tmpbuf, from_tty);
2803 if (c->doc) free (c->doc);
2806 register struct command_line *cl1;
2807 register int len = 0;
2809 for (cl1 = doclines; cl1; cl1 = cl1->next)
2810 len += strlen (cl1->line) + 1;
2812 c->doc = (char *) xmalloc (len + 1);
2815 for (cl1 = doclines; cl1; cl1 = cl1->next)
2817 strcat (c->doc, cl1->line);
2819 strcat (c->doc, "\n");
2823 free_command_lines (&doclines);
2827 print_gdb_version (stream)
2830 /* From GNU coding standards, first line is meant to be easy for a
2831 program to parse, and is just canonical program name and version
2832 number, which starts after last space. */
2834 fprintf_filtered (stream, "GNU gdb %s\n", version);
2836 /* Second line is a copyright notice. */
2838 fprintf_filtered (stream, "Copyright 1998 Free Software Foundation, Inc.\n");
2840 /* Following the copyright is a brief statement that the program is
2841 free software, that users are free to copy and change it on
2842 certain conditions, that it is covered by the GNU GPL, and that
2843 there is no warranty. */
2845 fprintf_filtered (stream, "\
2846 GDB is free software, covered by the GNU General Public License, and you are\n\
2847 welcome to change it and/or distribute copies of it under certain conditions.\n\
2848 Type \"show copying\" to see the conditions.\n\
2849 There is absolutely no warranty for GDB. Type \"show warranty\" for details.\n");
2851 /* After the required info we print the configuration information. */
2853 fprintf_filtered (stream, "This GDB was configured as \"");
2854 if (!STREQ (host_name, target_name))
2856 fprintf_filtered (stream, "--host=%s --target=%s", host_name, target_name);
2860 fprintf_filtered (stream, "%s", host_name);
2862 fprintf_filtered (stream, "\".");
2867 show_version (args, from_tty)
2872 print_gdb_version (gdb_stdout);
2873 printf_filtered ("\n");
2877 /* xgdb calls this to reprint the usual GDB prompt. Obsolete now that xgdb
2883 printf_unfiltered ("%s", prompt);
2884 gdb_flush (gdb_stdout);
2887 /* This replaces the above for the frontends: it returns a pointer
2895 /* If necessary, make the user confirm that we should quit. Return
2896 non-zero if we should quit, zero if we shouldn't. */
2901 if (inferior_pid != 0 && target_has_execution)
2905 /* This is something of a hack. But there's no reliable way to
2906 see if a GUI is running. The `use_windows' variable doesn't
2909 s = "A debugging session is active.\nDo you still want to close the debugger?";
2910 else if (attach_flag)
2911 s = "The program is running. Quit anyway (and detach it)? ";
2913 s = "The program is running. Exit anyway? ";
2922 /* Quit without asking for confirmation. */
2925 quit_force (args, from_tty)
2931 /* An optional expression may be used to cause gdb to terminate with the
2932 value of that expression. */
2935 value_ptr val = parse_and_eval (args);
2937 exit_code = (int) value_as_long (val);
2940 if (inferior_pid != 0 && target_has_execution)
2943 target_detach (args, from_tty);
2948 /* UDI wants this, to kill the TIP. */
2951 /* Save the history information if it is appropriate to do so. */
2952 if (write_history_p && history_filename)
2953 write_history (history_filename);
2955 do_final_cleanups(ALL_CLEANUPS); /* Do any final cleanups before exiting */
2960 /* Handle the quit command. */
2963 quit_command (args, from_tty)
2967 if (! quit_confirm ())
2968 error ("Not confirmed.");
2969 quit_force (args, from_tty);
2972 /* Returns whether GDB is running on a terminal and whether the user
2973 desires that questions be asked of them on that terminal. */
2976 input_from_terminal_p ()
2978 return gdb_has_a_terminal () && (instream == stdin) & caution;
2983 pwd_command (args, from_tty)
2987 if (args) error ("The \"pwd\" command does not take an argument: %s", args);
2988 getcwd (gdb_dirbuf, sizeof (gdb_dirbuf));
2990 if (!STREQ (gdb_dirbuf, current_directory))
2991 printf_unfiltered ("Working directory %s\n (canonically %s).\n",
2992 current_directory, gdb_dirbuf);
2994 printf_unfiltered ("Working directory %s.\n", current_directory);
2998 cd_command (dir, from_tty)
3003 /* Found something other than leading repetitions of "/..". */
3004 int found_real_path;
3007 /* If the new directory is absolute, repeat is a no-op; if relative,
3008 repeat might be useful but is more likely to be a mistake. */
3012 error_no_arg ("new working directory");
3014 dir = tilde_expand (dir);
3015 make_cleanup (free, dir);
3017 if (chdir (dir) < 0)
3018 perror_with_name (dir);
3021 dir = savestring (dir, len - (len > 1 && SLASH_P(dir[len-1])));
3023 current_directory = dir;
3026 if (SLASH_P (current_directory[0]) && current_directory[1] == '\0')
3027 current_directory = concat (current_directory, dir, NULL);
3029 current_directory = concat (current_directory, SLASH_STRING, dir, NULL);
3033 /* Now simplify any occurrences of `.' and `..' in the pathname. */
3035 found_real_path = 0;
3036 for (p = current_directory; *p;)
3038 if (SLASH_P (p[0]) && p[1] == '.' && (p[2] == 0 || SLASH_P (p[2])))
3040 else if (SLASH_P (p[0]) && p[1] == '.' && p[2] == '.'
3041 && (p[3] == 0 || SLASH_P (p[3])))
3043 if (found_real_path)
3045 /* Search backwards for the directory just before the "/.."
3046 and obliterate it and the "/..". */
3048 while (q != current_directory && ! SLASH_P (q[-1]))
3051 if (q == current_directory)
3052 /* current_directory is
3053 a relative pathname ("can't happen"--leave it alone). */
3057 strcpy (q - 1, p + 3);
3062 /* We are dealing with leading repetitions of "/..", for example
3063 "/../..", which is the Mach super-root. */
3068 found_real_path = 1;
3073 forget_cached_source_info ();
3076 pwd_command ((char *) 0, 1);
3079 struct source_cleanup_lines_args {
3082 char *old_pre_error;
3083 char *old_error_pre_print;
3087 source_cleanup_lines (args)
3090 struct source_cleanup_lines_args *p =
3091 (struct source_cleanup_lines_args *)args;
3092 source_line_number = p->old_line;
3093 source_file_name = p->old_file;
3094 source_pre_error = p->old_pre_error;
3095 error_pre_print = p->old_error_pre_print;
3100 source_command (args, from_tty)
3105 struct cleanup *old_cleanups;
3107 struct source_cleanup_lines_args old_lines;
3112 error ("source command requires pathname of file to source.");
3115 file = tilde_expand (file);
3116 old_cleanups = make_cleanup (free, file);
3118 stream = fopen (file, FOPEN_RT);
3121 perror_with_name (file);
3125 make_cleanup ((make_cleanup_func) fclose, stream);
3127 old_lines.old_line = source_line_number;
3128 old_lines.old_file = source_file_name;
3129 old_lines.old_pre_error = source_pre_error;
3130 old_lines.old_error_pre_print = error_pre_print;
3131 make_cleanup (source_cleanup_lines, &old_lines);
3132 source_line_number = 0;
3133 source_file_name = file;
3134 source_pre_error = error_pre_print == NULL ? "" : error_pre_print;
3135 source_pre_error = savestring (source_pre_error, strlen (source_pre_error));
3136 make_cleanup (free, source_pre_error);
3137 /* This will get set every time we read a line. So it won't stay "" for
3139 error_pre_print = "";
3141 needed_length = strlen (source_file_name) + strlen (source_pre_error) + 80;
3142 if (source_error_allocated < needed_length)
3144 source_error_allocated *= 2;
3145 if (source_error_allocated < needed_length)
3146 source_error_allocated = needed_length;
3147 if (source_error == NULL)
3148 source_error = xmalloc (source_error_allocated);
3150 source_error = xrealloc (source_error, source_error_allocated);
3153 read_command_file (stream);
3155 do_cleanups (old_cleanups);
3160 echo_command (text, from_tty)
3168 while ((c = *p++) != '\0')
3172 /* \ at end of argument is used after spaces
3173 so they won't be lost. */
3177 c = parse_escape (&p);
3179 printf_filtered ("%c", c);
3182 printf_filtered ("%c", c);
3185 /* Force this output to appear now. */
3187 gdb_flush (gdb_stdout);
3192 dont_repeat_command (ignored, from_tty)
3196 *line = 0; /* Can't call dont_repeat here because we're not
3197 necessarily reading from stdin. */
3200 /* Functions to manipulate the endianness of the target. */
3202 #ifdef TARGET_BYTE_ORDER_SELECTABLE
3203 #ifndef TARGET_BYTE_ORDER_DEFAULT
3204 #define TARGET_BYTE_ORDER_DEFAULT BIG_ENDIAN
3206 int target_byte_order = TARGET_BYTE_ORDER_DEFAULT;
3207 int target_byte_order_auto = 1;
3209 static int target_byte_order_auto = 0;
3212 /* Called if the user enters ``set endian'' without an argument. */
3214 set_endian (args, from_tty)
3218 printf_unfiltered ("\"set endian\" must be followed by \"auto\", \"big\" or \"little\".\n");
3219 show_endian (args, from_tty);
3222 /* Called by ``set endian big''. */
3224 set_endian_big (args, from_tty)
3228 #ifdef TARGET_BYTE_ORDER_SELECTABLE
3229 target_byte_order = BIG_ENDIAN;
3230 target_byte_order_auto = 0;
3232 printf_unfiltered ("Byte order is not selectable.");
3233 show_endian (args, from_tty);
3237 /* Called by ``set endian little''. */
3239 set_endian_little (args, from_tty)
3243 #ifdef TARGET_BYTE_ORDER_SELECTABLE
3244 target_byte_order = LITTLE_ENDIAN;
3245 target_byte_order_auto = 0;
3247 printf_unfiltered ("Byte order is not selectable.");
3248 show_endian (args, from_tty);
3252 /* Called by ``set endian auto''. */
3254 set_endian_auto (args, from_tty)
3258 #ifdef TARGET_BYTE_ORDER_SELECTABLE
3259 target_byte_order_auto = 1;
3261 printf_unfiltered ("Byte order is not selectable.");
3262 show_endian (args, from_tty);
3266 /* Called by ``show endian''. */
3268 show_endian (args, from_tty)
3273 (target_byte_order_auto
3274 ? "The target endianness is set automatically (currently %s endian)\n"
3275 : "The target is assumed to be %s endian\n");
3276 printf_unfiltered ((char *) msg, TARGET_BYTE_ORDER == BIG_ENDIAN ? "big" : "little");
3279 /* Set the endianness from a BFD. */
3281 set_endian_from_file (abfd)
3284 #ifdef TARGET_BYTE_ORDER_SELECTABLE
3287 if (bfd_big_endian (abfd))
3290 want = LITTLE_ENDIAN;
3291 if (target_byte_order_auto)
3292 target_byte_order = want;
3293 else if (target_byte_order != want)
3294 warning ("%s endian file does not match %s endian target.",
3295 want == BIG_ENDIAN ? "big" : "little",
3296 TARGET_BYTE_ORDER == BIG_ENDIAN ? "big" : "little");
3298 #else /* ! defined (TARGET_BYTE_ORDER_SELECTABLE) */
3300 if (bfd_big_endian (abfd)
3301 ? TARGET_BYTE_ORDER != BIG_ENDIAN
3302 : TARGET_BYTE_ORDER == BIG_ENDIAN)
3303 warning ("%s endian file does not match %s endian target.",
3304 bfd_big_endian (abfd) ? "big" : "little",
3305 TARGET_BYTE_ORDER == BIG_ENDIAN ? "big" : "little");
3307 #endif /* ! defined (TARGET_BYTE_ORDER_SELECTABLE) */
3310 /* Functions to manipulate the architecture of the target */
3312 int target_architecture_auto = 1;
3313 extern const bfd_arch_info_type bfd_default_arch_struct;
3314 const bfd_arch_info_type *target_architecture = &bfd_default_arch_struct;
3315 int (*target_architecture_hook) PARAMS ((const bfd_arch_info_type *ap));
3319 const bfd_arch_info_type *arch;
3321 /* FIXME: Is it compatible with gdb? */
3322 /* Check with the target on the setting */
3323 if (target_architecture_hook != NULL
3324 && !target_architecture_hook (arch))
3325 printf_unfiltered ("Target does not support `%s' architecture.\n",
3326 arch->printable_name);
3329 target_architecture_auto = 0;
3330 target_architecture = arch;
3335 /* Called if the user enters ``set architecture'' with or without an
3338 set_architecture (args, from_tty)
3344 printf_unfiltered ("\"set architecture\" must be followed by \"auto\" or an architecture name.\n");
3346 else if (strcmp (args, "auto") == 0)
3348 target_architecture_auto = 1;
3352 const bfd_arch_info_type *arch = bfd_scan_arch (args);
3356 printf_unfiltered ("Architecture `%s' not reconized.\n", args);
3360 /* Called if the user enters ``show architecture'' without an argument. */
3362 show_architecture (args, from_tty)
3367 arch = target_architecture->printable_name;
3368 if (target_architecture_auto)
3369 printf_filtered ("The target architecture is set automatically (currently %s)\n", arch);
3371 printf_filtered ("The target architecture is assumed to be %s\n", arch);
3374 /* Called if the user enters ``info architecture'' without an argument. */
3376 info_architecture (args, from_tty)
3380 enum bfd_architecture a;
3381 printf_filtered ("Available architectures are:\n");
3382 for (a = bfd_arch_obscure + 1; a < bfd_arch_last; a++)
3384 const bfd_arch_info_type *ap = bfd_lookup_arch (a, 0);
3389 printf_filtered (" %s", ap->printable_name);
3393 printf_filtered ("\n");
3398 /* Set the architecture from arch/machine */
3400 set_architecture_from_arch_mach (arch, mach)
3401 enum bfd_architecture arch;
3404 const bfd_arch_info_type *wanted = bfd_lookup_arch (arch, mach);
3408 fatal ("hardwired architecture/machine not reconized");
3412 /* Set the architecture from a BFD */
3414 set_architecture_from_file (abfd)
3417 const bfd_arch_info_type *wanted = bfd_get_arch_info (abfd);
3418 if (target_architecture_auto)
3420 if (target_architecture_hook != NULL
3421 && !target_architecture_hook (wanted))
3422 warning ("Target may not support %s architecture",
3423 wanted->printable_name);
3424 target_architecture = wanted;
3426 else if (wanted != target_architecture)
3428 warning ("%s architecture file may be incompatible with %s target.",
3429 wanted->printable_name,
3430 target_architecture->printable_name);
3434 /* Functions to manipulate command line editing control variables. */
3436 /* Number of commands to print in each call to show_commands. */
3437 #define Hist_print 10
3439 show_commands (args, from_tty)
3443 /* Index for history commands. Relative to history_base. */
3446 /* Number of the history entry which we are planning to display next.
3447 Relative to history_base. */
3450 /* The first command in the history which doesn't exist (i.e. one more
3451 than the number of the last command). Relative to history_base. */
3454 extern HIST_ENTRY *history_get PARAMS ((int));
3456 /* Print out some of the commands from the command history. */
3457 /* First determine the length of the history list. */
3458 hist_len = history_size;
3459 for (offset = 0; offset < history_size; offset++)
3461 if (!history_get (history_base + offset))
3470 if (args[0] == '+' && args[1] == '\0')
3471 /* "info editing +" should print from the stored position. */
3474 /* "info editing <exp>" should print around command number <exp>. */
3475 num = (parse_and_eval_address (args) - history_base) - Hist_print / 2;
3477 /* "show commands" means print the last Hist_print commands. */
3480 num = hist_len - Hist_print;
3486 /* If there are at least Hist_print commands, we want to display the last
3487 Hist_print rather than, say, the last 6. */
3488 if (hist_len - num < Hist_print)
3490 num = hist_len - Hist_print;
3495 for (offset = num; offset < num + Hist_print && offset < hist_len; offset++)
3497 printf_filtered ("%5d %s\n", history_base + offset,
3498 (history_get (history_base + offset))->line);
3501 /* The next command we want to display is the next one that we haven't
3505 /* If the user repeats this command with return, it should do what
3506 "show commands +" does. This is unnecessary if arg is null,
3507 because "show commands +" is not useful after "show commands". */
3508 if (from_tty && args)
3515 /* Called by do_setshow_command. */
3518 set_history_size_command (args, from_tty, c)
3521 struct cmd_list_element *c;
3523 if (history_size == INT_MAX)
3524 unstifle_history ();
3525 else if (history_size >= 0)
3526 stifle_history (history_size);
3529 history_size = INT_MAX;
3530 error ("History size must be non-negative");
3536 set_history (args, from_tty)
3540 printf_unfiltered ("\"set history\" must be followed by the name of a history subcommand.\n");
3541 help_list (sethistlist, "set history ", -1, gdb_stdout);
3546 show_history (args, from_tty)
3550 cmd_show_list (showhistlist, from_tty, "");
3553 int info_verbose = 0; /* Default verbose msgs off */
3555 /* Called by do_setshow_command. An elaborate joke. */
3558 set_verbose (args, from_tty, c)
3561 struct cmd_list_element *c;
3563 char *cmdname = "verbose";
3564 struct cmd_list_element *showcmd;
3566 showcmd = lookup_cmd_1 (&cmdname, showlist, NULL, 1);
3570 c->doc = "Set verbose printing of informational messages.";
3571 showcmd->doc = "Show verbose printing of informational messages.";
3575 c->doc = "Set verbosity.";
3576 showcmd->doc = "Show verbosity.";
3581 float_handler (signo)
3584 /* This message is based on ANSI C, section 4.7. Note that integer
3585 divide by zero causes this, so "float" is a misnomer. */
3586 signal (SIGFPE, float_handler);
3587 error ("Erroneous arithmetic operation.");
3599 enablebreaklist = NULL;
3605 showhistlist = NULL;
3606 unsethistlist = NULL;
3607 #if MAINTENANCE_CMDS
3608 maintenancelist = NULL;
3609 maintenanceinfolist = NULL;
3610 maintenanceprintlist = NULL;
3612 setprintlist = NULL;
3613 showprintlist = NULL;
3614 setchecklist = NULL;
3615 showchecklist = NULL;
3618 /* Init the history buffer. Note that we are called after the init file(s)
3619 * have been read so that the user can change the history file via his
3620 * .gdbinit file (for instance). The GDBHISTFILE environment variable
3621 * overrides all of this.
3629 tmpenv = getenv ("HISTSIZE");
3631 history_size = atoi (tmpenv);
3632 else if (!history_size)
3635 stifle_history (history_size);
3637 tmpenv = getenv ("GDBHISTFILE");
3639 history_filename = savestring (tmpenv, strlen(tmpenv));
3640 else if (!history_filename) {
3641 /* We include the current directory so that if the user changes
3642 directories the file written will be the same as the one
3644 history_filename = concat (current_directory, "/.gdb_history", NULL);
3646 read_history (history_filename);
3652 struct cmd_list_element *c;
3654 add_prefix_cmd ("endian", class_support, set_endian,
3655 "Set endianness of target.",
3656 &endianlist, "set endian ", 0, &setlist);
3657 add_cmd ("big", class_support, set_endian_big,
3658 "Set target as being big endian.", &endianlist);
3659 add_cmd ("little", class_support, set_endian_little,
3660 "Set target as being little endian.", &endianlist);
3661 add_cmd ("auto", class_support, set_endian_auto,
3662 "Select target endianness automatically.", &endianlist);
3663 add_cmd ("endian", class_support, show_endian,
3664 "Show endianness of target.", &showlist);
3666 add_cmd ("architecture", class_support, set_architecture,
3667 "Set architecture of target.", &setlist);
3668 add_alias_cmd ("processor", "architecture", class_support, 1, &setlist);
3669 add_cmd ("architecture", class_support, show_architecture,
3670 "Show architecture of target.", &showlist);
3671 add_cmd ("architecture", class_support, info_architecture,
3672 "List supported target architectures", &infolist);
3675 #ifdef DEFAULT_PROMPT
3676 prompt = savestring (DEFAULT_PROMPT, strlen(DEFAULT_PROMPT));
3678 prompt = savestring ("(gdb) ", 6);
3681 /* Set the important stuff up for command editing. */
3682 command_editing_p = 1;
3683 history_expansion_p = 0;
3684 write_history_p = 0;
3686 /* Setup important stuff for command line editing. */
3687 rl_completion_entry_function = (int (*)()) readline_line_completion_function;
3688 rl_completer_word_break_characters = gdb_completer_word_break_characters;
3689 rl_completer_quote_characters = gdb_completer_quote_characters;
3690 rl_readline_name = "gdb";
3692 /* Define the classes of commands.
3693 They will appear in the help list in the reverse of this order. */
3695 add_cmd ("internals", class_maintenance, NO_FUNCTION,
3696 "Maintenance commands.\n\
3697 Some gdb commands are provided just for use by gdb maintainers.\n\
3698 These commands are subject to frequent change, and may not be as\n\
3699 well documented as user commands.",
3701 add_cmd ("obscure", class_obscure, NO_FUNCTION, "Obscure features.", &cmdlist);
3702 add_cmd ("aliases", class_alias, NO_FUNCTION, "Aliases of other commands.", &cmdlist);
3703 add_cmd ("user-defined", class_user, NO_FUNCTION, "User-defined commands.\n\
3704 The commands in this class are those defined by the user.\n\
3705 Use the \"define\" command to define a command.", &cmdlist);
3706 add_cmd ("support", class_support, NO_FUNCTION, "Support facilities.", &cmdlist);
3707 add_cmd ("status", class_info, NO_FUNCTION, "Status inquiries.", &cmdlist);
3708 add_cmd ("files", class_files, NO_FUNCTION, "Specifying and examining files.", &cmdlist);
3709 add_cmd ("breakpoints", class_breakpoint, NO_FUNCTION, "Making program stop at certain points.", &cmdlist);
3710 add_cmd ("data", class_vars, NO_FUNCTION, "Examining data.", &cmdlist);
3711 add_cmd ("stack", class_stack, NO_FUNCTION, "Examining the stack.\n\
3712 The stack is made up of stack frames. Gdb assigns numbers to stack frames\n\
3713 counting from zero for the innermost (currently executing) frame.\n\n\
3714 At any time gdb identifies one frame as the \"selected\" frame.\n\
3715 Variable lookups are done with respect to the selected frame.\n\
3716 When the program being debugged stops, gdb selects the innermost frame.\n\
3717 The commands below can be used to select other frames by number or address.",
3719 add_cmd ("running", class_run, NO_FUNCTION, "Running the program.", &cmdlist);
3721 add_com ("pwd", class_files, pwd_command,
3722 "Print working directory. This is used for your program as well.");
3723 c = add_cmd ("cd", class_files, cd_command,
3724 "Set working directory to DIR for debugger and program being debugged.\n\
3725 The change does not take effect for the program being debugged\n\
3726 until the next time it is started.", &cmdlist);
3727 c->completer = filename_completer;
3730 (add_set_cmd ("prompt", class_support, var_string, (char *)&prompt,
3735 add_com ("echo", class_support, echo_command,
3736 "Print a constant string. Give string as argument.\n\
3737 C escape sequences may be used in the argument.\n\
3738 No newline is added at the end of the argument;\n\
3739 use \"\\n\" if you want a newline to be printed.\n\
3740 Since leading and trailing whitespace are ignored in command arguments,\n\
3741 if you want to print some you must use \"\\\" before leading whitespace\n\
3742 to be printed or after trailing whitespace.");
3743 add_com ("document", class_support, document_command,
3744 "Document a user-defined command.\n\
3745 Give command name as argument. Give documentation on following lines.\n\
3746 End with a line of just \"end\".");
3747 add_com ("define", class_support, define_command,
3748 "Define a new command name. Command name is argument.\n\
3749 Definition appears on following lines, one command per line.\n\
3750 End with a line of just \"end\".\n\
3751 Use the \"document\" command to give documentation for the new command.\n\
3752 Commands defined in this way may have up to ten arguments.");
3755 c = add_cmd ("source", class_support, source_command,
3756 "Read commands from a file named FILE.\n\
3757 Note that the file \"" GDBINIT_FILENAME "\" is read automatically in this way\n\
3758 when gdb is started.", &cmdlist);
3760 /* Punt file name, we can't help it easily. */
3761 c = add_cmd ("source", class_support, source_command,
3762 "Read commands from a file named FILE.\n\
3763 Note that the file \".gdbinit\" is read automatically in this way\n\
3764 when gdb is started.", &cmdlist);
3766 c->completer = filename_completer;
3768 add_com ("quit", class_support, quit_command, "Exit gdb.");
3769 add_com ("help", class_support, help_command, "Print list of commands.");
3770 add_com_alias ("q", "quit", class_support, 1);
3771 add_com_alias ("h", "help", class_support, 1);
3773 add_com ("dont-repeat", class_support, dont_repeat_command, "Don't repeat this command.\n\
3774 Primarily used inside of user-defined commands that should not be repeated when\n\
3777 c = add_set_cmd ("verbose", class_support, var_boolean, (char *)&info_verbose,
3780 add_show_from_set (c, &showlist);
3781 c->function.sfunc = set_verbose;
3782 set_verbose (NULL, 0, c);
3785 (add_set_cmd ("editing", class_support, var_boolean, (char *)&command_editing_p,
3786 "Set editing of command lines as they are typed.\n\
3787 Use \"on\" to enable the editing, and \"off\" to disable it.\n\
3788 Without an argument, command line editing is enabled. To edit, use\n\
3789 EMACS-like or VI-like commands like control-P or ESC.", &setlist),
3792 add_prefix_cmd ("history", class_support, set_history,
3793 "Generic command for setting command history parameters.",
3794 &sethistlist, "set history ", 0, &setlist);
3795 add_prefix_cmd ("history", class_support, show_history,
3796 "Generic command for showing command history parameters.",
3797 &showhistlist, "show history ", 0, &showlist);
3800 (add_set_cmd ("expansion", no_class, var_boolean, (char *)&history_expansion_p,
3801 "Set history expansion on command input.\n\
3802 Without an argument, history expansion is enabled.", &sethistlist),
3806 (add_set_cmd ("save", no_class, var_boolean, (char *)&write_history_p,
3807 "Set saving of the history record on exit.\n\
3808 Use \"on\" to enable the saving, and \"off\" to disable it.\n\
3809 Without an argument, saving is enabled.", &sethistlist),
3812 c = add_set_cmd ("size", no_class, var_integer, (char *)&history_size,
3813 "Set the size of the command history, \n\
3814 ie. the number of previous commands to keep a record of.", &sethistlist);
3815 add_show_from_set (c, &showhistlist);
3816 c->function.sfunc = set_history_size_command;
3819 (add_set_cmd ("filename", no_class, var_filename, (char *)&history_filename,
3820 "Set the filename in which to record the command history\n\
3821 (the list of previous commands of which a record is kept).", &sethistlist),
3825 (add_set_cmd ("confirm", class_support, var_boolean,
3827 "Set whether to confirm potentially dangerous operations.",
3831 add_prefix_cmd ("info", class_info, info_command,
3832 "Generic command for showing things about the program being debugged.",
3833 &infolist, "info ", 0, &cmdlist);
3834 add_com_alias ("i", "info", class_info, 1);
3836 add_com ("complete", class_obscure, complete_command,
3837 "List the completions for the rest of the line as a command.");
3839 add_prefix_cmd ("show", class_info, show_command,
3840 "Generic command for showing things about the debugger.",
3841 &showlist, "show ", 0, &cmdlist);
3842 /* Another way to get at the same thing. */
3843 add_info ("set", show_command, "Show all GDB settings.");
3845 add_cmd ("commands", no_class, show_commands,
3846 "Show the history of commands you typed.\n\
3847 You can supply a command number to start with, or a `+' to start after\n\
3848 the previous command number shown.",
3851 add_cmd ("version", no_class, show_version,
3852 "Show what version of GDB this is.", &showlist);
3854 add_com ("while", class_support, while_command,
3855 "Execute nested commands WHILE the conditional expression is non zero.\n\
3856 The conditional expression must follow the word `while' and must in turn be\n\
3857 followed by a new line. The nested commands must be entered one per line,\n\
3858 and should be terminated by the word `end'.");
3860 add_com ("if", class_support, if_command,
3861 "Execute nested commands once IF the conditional expression is non zero.\n\
3862 The conditional expression must follow the word `if' and must in turn be\n\
3863 followed by a new line. The nested commands must be entered one per line,\n\
3864 and should be terminated by the word 'else' or `end'. If an else clause\n\
3865 is used, the same rules apply to its nested commands as to the first ones.");
3867 /* If target is open when baud changes, it doesn't take effect until the
3868 next open (I think, not sure). */
3869 add_show_from_set (add_set_cmd ("remotebaud", no_class,
3870 var_zinteger, (char *)&baud_rate,
3871 "Set baud rate for remote serial I/O.\n\
3872 This value is used to set the speed of the serial port when debugging\n\
3873 using remote targets.", &setlist),
3877 add_set_cmd ("remotedebug", no_class, var_zinteger, (char *)&remote_debug,
3878 "Set debugging of remote protocol.\n\
3879 When enabled, each packet sent or received with the remote target\n\
3880 is displayed.", &setlist),
3884 add_set_cmd ("remotetimeout", no_class, var_integer, (char *)&remote_timeout,
3885 "Set timeout limit to wait for target to respond.\n\
3886 This value is used to set the time limit for gdb to wait for a response\n\
3887 from he target.", &setlist),
3890 c = add_set_cmd ("annotate", class_obscure, var_zinteger,
3891 (char *)&annotation_level, "Set annotation_level.\n\
3892 0 == normal; 1 == fullname (for use when running under emacs)\n\
3893 2 == output annotated suitably for use by programs that control GDB.",
3895 c = add_show_from_set (c, &showlist);