Merge to Cygnus 961112 + add some support (not ready) for shared libs

1 files changed, 3465 insertions, 0 deletions

diff --git a/gnu/usr.bin/binutils/gdb/gdbtk.tcl b/gnu/usr.bin/binutils/gdb/gdbtk.tcl
new file mode 100644
index 00000000000..598e59ca1ae
--- /dev/null
+++ b/gnu/usr.bin/binutils/gdb/gdbtk.tcl
@@ -0,0 +1,3465 @@
+# GDB GUI setup for GDB, the GNU debugger.
+# Copyright 1994, 1995, 1996
+# Free Software Foundation, Inc.
+
+# Written by Stu Grossman <grossman@cygnus.com> of Cygnus Support.
+
+# This file is part of GDB.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+set cfile Blank
+set wins($cfile) .src.text
+set current_label {}
+set cfunc NIL
+set line_numbers 1
+set breakpoint_file(-1) {[garbage]}
+set disassemble_with_source nosource
+set gdb_prompt "(gdb) "
+
+# Hint: The following can be toggled from a tclsh window after
+# using the gdbtk "tk tclsh" command to open the window.
+set debug_interface 0
+
+#option add *Foreground Black
+#option add *Background White
+#option add *Font -*-*-medium-r-normal--18-*-*-*-m-*-*-1
+
+proc echo string {puts stdout $string}
+
+# Assign elements from LIST to variables named in ARGS.  FIXME replace
+# with TclX version someday.
+proc lassign {list args} {
+  set len [expr {[llength $args] - 1}]
+  while {$len >= 0} {
+    upvar [lindex $args $len] local
+    set local [lindex $list $len]
+    decr len
+  }
+}
+
+#
+# Local procedure:
+#
+#	decr (var val) - compliment to incr
+#
+# Description:
+#
+#
+proc decr {var {val 1}} {
+  upvar $var num
+  set num [expr {$num - $val}]
+  return $num
+}
+
+#
+# Center a window on the screen.
+#
+proc center_window {toplevel} {
+  # Withdraw and update, to ensure geometry computations are finished.
+  wm withdraw $toplevel
+  update idletasks
+
+  set x [expr {[winfo screenwidth $toplevel] / 2
+	       - [winfo reqwidth $toplevel] / 2
+	       - [winfo vrootx $toplevel]}]
+  set y [expr {[winfo screenheight $toplevel] / 2
+	       - [winfo reqheight $toplevel] / 2
+	       - [winfo vrooty $toplevel]}]
+  wm geometry $toplevel +${x}+${y}
+  wm deiconify $toplevel
+}
+
+#
+# Rearrange the bindtags so the widget comes after the class.  I was
+# always for Ousterhout putting the class bindings first, but no...
+#
+proc bind_widget_after_class {widget} {
+  set class [winfo class $widget]
+  set newList {}
+  foreach tag [bindtags $widget] {
+    if {$tag == $widget} {
+      # Nothing.
+    } {
+      lappend newList $tag
+      if {$tag == $class} {
+	lappend newList $widget
+      }
+    }
+  }
+  bindtags $widget $newList
+}
+
+#
+# Make sure line number $LINE is visible in the text widget.  But be
+# more clever than the "see" command: if LINE is not currently
+# displayed, arrange for LINE to be centered.  There are cases in
+# which this does not work, so as a last resort we revert to "see".
+#
+# This is inefficient, but probably not slow enough to actually
+# notice.
+#
+proc ensure_line_visible {text line} {
+  set pixHeight [winfo height $text]
+  # Compute height of widget in lines.  This fails if a line is wider
+  # than the screen.  FIXME.
+  set topLine [lindex [split [$text index @0,0] .] 0]
+  set botLine [lindex [split [$text index @0,${pixHeight}] .] 0]
+
+  if {$line > $topLine && $line < $botLine} then {
+    # Onscreen, and not on the very edge.
+    return
+  }
+
+  set newTop [expr {$line - ($botLine - $topLine)}]
+  if {$newTop < 0} then {
+    set newTop 0
+  }
+  $text yview moveto $newTop
+
+  # In case the above failed.
+  $text see ${line}.0
+}
+
+if {[info exists env(EDITOR)]} then {
+  set editor $env(EDITOR)
+} else {
+  set editor emacs
+}
+
+# GDB callbacks
+#
+#  These functions are called by GDB (from C code) to do various things in
+#  TK-land.  All start with the prefix `gdbtk_tcl_' to make them easy to find.
+#
+
+#
+# GDB Callback:
+#
+#	gdbtk_tcl_fputs (text) - Output text to the command window
+#
+# Description:
+#
+#	GDB calls this to output TEXT to the GDB command window.  The text is
+#	placed at the end of the text widget.  Note that output may not occur,
+#	due to buffering.  Use gdbtk_tcl_flush to cause an immediate update.
+#
+
+proc gdbtk_tcl_fputs {arg} {
+  .cmd.text insert end "$arg"
+  .cmd.text see end
+}
+
+proc gdbtk_tcl_fputs_error {arg} {
+  .cmd.text insert end "$arg"
+  .cmd.text see end
+}
+
+#
+# GDB Callback:
+#
+#	gdbtk_tcl_flush () - Flush output to the command window
+#
+# Description:
+#
+#	GDB calls this to force all buffered text to the GDB command window.
+#
+
+proc gdbtk_tcl_flush {} {
+  .cmd.text see end
+  update idletasks
+}
+
+#
+# GDB Callback:
+#
+#	gdbtk_tcl_query (message) - Create a yes/no query dialog box
+#
+# Description:
+#
+#	GDB calls this to create a yes/no dialog box containing MESSAGE.  GDB
+#	is hung while the dialog box is active (ie: no commands will work),
+#	however windows can still be refreshed in case of damage or exposure.
+#
+
+proc gdbtk_tcl_query {message} {
+  # FIXME We really want a Help button here.  But Tk's brain-damaged
+  # modal dialogs won't really allow it.  Should have async dialog
+  # here.
+  set result [tk_dialog .query "gdb : query" "$message" questhead 0 Yes No]
+  return [expr {!$result}]
+}
+
+#
+# GDB Callback:
+#
+#	gdbtk_start_variable_annotation (args ...) - 
+#
+# Description:
+#
+#	Not yet implemented.
+#
+
+proc gdbtk_tcl_start_variable_annotation {valaddr ref_type stor_cl
+					  cum_expr field type_cast} {
+  echo "gdbtk_tcl_start_variable_annotation $valaddr $ref_type $stor_cl $cum_expr $field $type_cast"
+}
+
+#
+# GDB Callback:
+#
+#	gdbtk_end_variable_annotation (args ...) - 
+#
+# Description:
+#
+#	Not yet implemented.
+#
+
+proc gdbtk_tcl_end_variable_annotation {} {
+	echo gdbtk_tcl_end_variable_annotation
+}
+
+#
+# GDB Callback:
+#
+#	gdbtk_tcl_breakpoint (action bpnum file line) - Notify the TK
+#	interface of changes to breakpoints.
+#
+# Description:
+#
+#	GDB calls this to notify TK of changes to breakpoints.  ACTION is one
+#	of:
+#		create		- Notify of breakpoint creation
+#		delete		- Notify of breakpoint deletion
+#		modify		- Notify of breakpoint modification
+#
+
+# file line pc type enabled disposition silent ignore_count commands cond_string thread hit_count
+
+proc gdbtk_tcl_breakpoint {action bpnum} {
+	set bpinfo [gdb_get_breakpoint_info $bpnum]
+	set file [lindex $bpinfo 0]
+	set line [lindex $bpinfo 1]
+	set pc [lindex $bpinfo 2]
+	set enable [lindex $bpinfo 4]
+
+	if {$action == "modify"} {
+		if {$enable == "1"} {
+			set action enable
+		} else {
+			set action disable
+		}
+	}
+
+	${action}_breakpoint $bpnum $file $line $pc
+}
+
+#
+# GDB Callback:
+#
+#	gdbtk_tcl_readline_begin (message) - Notify Tk to open an interaction
+#	window and start gathering user input
+#
+# Description:
+#
+#	GDB calls this to notify TK that it needs to open an interaction
+#	window, displaying the given message, and be prepared to accept
+#	calls to gdbtk_tcl_readline to gather user input.
+
+proc gdbtk_tcl_readline_begin {message} {
+    global readline_text
+
+    # If another readline window already exists, just bring it to the front.
+    if {[winfo exists .rl]} {raise .rl ; return}
+
+    # Create top level frame with scrollbar and text widget.
+    toplevel .rl
+    wm title .rl "Interaction Window"
+    wm iconname .rl "Input"
+    message .rl.msg -text $message -aspect 7500 -justify left
+    text .rl.text -width 80 -height 20 -setgrid true -cursor hand2 \
+	    -yscrollcommand {.rl.scroll set}
+    scrollbar .rl.scroll -command {.rl.text yview}
+    pack .rl.msg -side top -fill x
+    pack .rl.scroll -side right -fill y
+    pack .rl.text -side left -fill both -expand true
+
+    # When the user presses return, get the text from the command start mark to the
+    # current insert point, stash it in the readline text variable, and update the
+    # command start mark to the current insert point
+    bind .rl.text <Return> {
+	set readline_text [.rl.text get cmdstart {end - 1 char}]
+	.rl.text mark set cmdstart insert
+    }
+    bind .rl.text <BackSpace> {
+	if [%W compare insert > cmdstart] {
+	    %W delete {insert - 1 char} insert
+	} else {
+	    bell
+	}
+	break
+    }
+    bind .rl.text <Any-Key> {
+	if [%W compare insert < cmdstart] {
+	    %W mark set insert end
+	}
+    }
+    bind .rl.text <Control-u> {
+	%W delete cmdstart "insert lineend"
+	%W see insert
+    }
+    bindtags .rl.text {.rl.text Text all}
+}
+
+#
+# GDB Callback:
+#
+#	gdbtk_tcl_readline (prompt) - Get one user input line
+#
+# Description:
+#
+#	GDB calls this to get one line of input from the user interaction
+#	window, using "prompt" as the command line prompt.
+
+proc gdbtk_tcl_readline {prompt} {
+    global readline_text
+
+    .rl.text insert end $prompt
+    .rl.text mark set cmdstart insert
+    .rl.text mark gravity cmdstart left
+    .rl.text see insert
+
+    # Make this window the current one for input.
+    focus .rl.text
+    grab .rl
+    tkwait variable readline_text
+    grab release .rl
+    return $readline_text
+}
+
+#
+# GDB Callback:
+#
+#	gdbtk_tcl_readline_end  - Terminate a user interaction
+#
+# Description:
+#
+#	GDB calls this when it is done getting interactive user input.
+#	Destroy the interaction window.
+
+proc gdbtk_tcl_readline_end {} {
+    if {[winfo exists .rl]} { destroy .rl }
+}
+
+proc create_breakpoints_window {} {
+	global bpframe_lasty
+
+	if {[winfo exists .breakpoints]} {raise .breakpoints ; return}
+
+	build_framework .breakpoints "Breakpoints" ""
+
+# First, delete all the old view menu entries
+
+	.breakpoints.menubar.view.menu delete 0 last
+
+# Get rid of label
+
+	destroy .breakpoints.label
+
+# Replace text with a canvas and fix the scrollbars
+
+	destroy .breakpoints.text
+	scrollbar .breakpoints.scrollx -orient horizontal \
+		-command {.breakpoints.c xview} -relief sunken
+	canvas .breakpoints.c -relief sunken -bd 2 \
+		-cursor hand2 \
+	        -yscrollcommand {.breakpoints.scroll set} \
+	        -xscrollcommand {.breakpoints.scrollx set}
+	.breakpoints.scroll configure -command {.breakpoints.c yview}
+
+	pack .breakpoints.scrollx -side bottom -fill x -in .breakpoints.info
+	pack .breakpoints.c -side left -expand yes -fill both \
+		-in .breakpoints.info
+
+	set bpframe_lasty 0
+
+# Create a frame for each breakpoint
+
+	foreach bpnum [gdb_get_breakpoint_list] {
+		add_breakpoint_frame $bpnum
+	}
+}
+
+# Create a frame for bpnum in the .breakpoints canvas
+
+proc add_breakpoint_frame {bpnum} {
+  global bpframe_lasty
+  global enabled
+  global disposition
+
+  if {![winfo exists .breakpoints]} return
+
+  set bpinfo [gdb_get_breakpoint_info $bpnum]
+
+  lassign $bpinfo file line pc type enabled($bpnum) disposition($bpnum) \
+    silent ignore_count commands cond thread hit_count
+
+  set f .breakpoints.c.$bpnum
+
+  if {![winfo exists $f]} {
+    frame $f -relief sunken -bd 2
+
+    label $f.id -text "#$bpnum     $file:$line    ($pc)" \
+      -relief flat -bd 2 -anchor w
+    frame $f.hit_count
+    label $f.hit_count.label -text "Hit count:" -relief flat \
+      -bd 2 -anchor w -width 11
+    label $f.hit_count.val -text $hit_count -relief flat \
+      -bd 2 -anchor w
+    checkbutton $f.hit_count.enabled -text Enabled \
+      -variable enabled($bpnum) -anchor w -relief flat
+
+    pack $f.hit_count.label $f.hit_count.val -side left
+    pack $f.hit_count.enabled -side right
+
+    frame $f.thread
+    label $f.thread.label -text "Thread: " -relief flat -bd 2 \
+      -width 11 -anchor w
+    entry $f.thread.entry -bd 2 -relief sunken -width 10
+    $f.thread.entry insert end $thread
+    pack $f.thread.label -side left
+    pack $f.thread.entry -side left -fill x
+
+    frame $f.cond
+    label $f.cond.label -text "Condition: " -relief flat -bd 2 \
+      -width 11 -anchor w
+    entry $f.cond.entry -bd 2 -relief sunken
+    $f.cond.entry insert end $cond
+    pack $f.cond.label -side left
+    pack $f.cond.entry -side left -fill x -expand yes
+
+    frame $f.ignore_count
+    label $f.ignore_count.label -text "Ignore count: " \
+      -relief flat -bd 2 -width 11 -anchor w
+    entry $f.ignore_count.entry -bd 2 -relief sunken -width 10
+    $f.ignore_count.entry insert end $ignore_count
+    pack $f.ignore_count.label -side left
+    pack $f.ignore_count.entry -side left -fill x
+
+    frame $f.disps
+
+    label $f.disps.label -text "Disposition: " -relief flat -bd 2 \
+      -anchor w -width 11
+
+    radiobutton $f.disps.delete -text Delete \
+      -variable disposition($bpnum) -anchor w -relief flat \
+      -command "gdb_cmd \"delete break $bpnum\"" \
+      -value delete
+
+    radiobutton $f.disps.disable -text Disable \
+      -variable disposition($bpnum) -anchor w -relief flat \
+      -command "gdb_cmd \"disable break $bpnum\"" \
+      -value disable
+
+    radiobutton $f.disps.donttouch -text "Leave alone" \
+      -variable disposition($bpnum) -anchor w -relief flat \
+      -command "gdb_cmd \"enable break $bpnum\"" \
+      -value donttouch
+
+    pack $f.disps.label $f.disps.delete $f.disps.disable \
+      $f.disps.donttouch -side left -anchor w
+    text $f.commands -relief sunken -bd 2 -setgrid true \
+      -cursor hand2 -height 3 -width 30
+
+    foreach line $commands {
+      $f.commands insert end "${line}\n"
+    }
+
+    pack $f.id -side top -anchor nw -fill x
+    pack $f.hit_count $f.cond $f.thread $f.ignore_count $f.disps \
+      $f.commands -side top -fill x -anchor nw
+  }
+
+  set tag [.breakpoints.c create window 0 $bpframe_lasty -window $f -anchor nw]
+  update
+  set bbox [.breakpoints.c bbox $tag]
+
+  set bpframe_lasty [lindex $bbox 3]
+
+  .breakpoints.c configure -width [lindex $bbox 2]
+}
+
+# Delete a breakpoint frame
+
+proc delete_breakpoint_frame {bpnum} {
+	global bpframe_lasty
+
+	if {![winfo exists .breakpoints]} return
+
+# First, clear the canvas
+
+	.breakpoints.c delete all
+
+# Now, repopulate it with all but the doomed breakpoint
+
+	set bpframe_lasty 0
+	foreach bp [gdb_get_breakpoint_list] {
+		if {$bp != $bpnum} {
+			add_breakpoint_frame $bp
+		}
+	}
+}
+
+proc asm_win_name {funcname} {
+	if {$funcname == "*None*"} {return .asm.text}
+
+	regsub -all {\.} $funcname _ temp
+
+	return .asm.func_${temp}
+}
+
+#
+# Local procedure:
+#
+#	create_breakpoint (bpnum file line pc) - Record breakpoint info in TK land
+#
+# Description:
+#
+#	GDB calls this indirectly (through gdbtk_tcl_breakpoint) to notify TK
+#	land of breakpoint creation.  This consists of recording the file and
+#	line number in the breakpoint_file and breakpoint_line arrays.  Also,
+#	if there is already a window associated with FILE, it is updated with
+#	a breakpoint tag.
+#
+
+proc create_breakpoint {bpnum file line pc} {
+	global wins
+	global breakpoint_file
+	global breakpoint_line
+	global pos_to_breakpoint
+	global pos_to_bpcount
+	global cfunc
+	global pclist
+
+# Record breakpoint locations
+
+	set breakpoint_file($bpnum) $file
+	set breakpoint_line($bpnum) $line
+	set pos_to_breakpoint($file:$line) $bpnum
+	if {![info exists pos_to_bpcount($file:$line)]} {
+		set pos_to_bpcount($file:$line) 0
+	}
+	incr pos_to_bpcount($file:$line)
+	set pos_to_breakpoint($pc) $bpnum
+	if {![info exists pos_to_bpcount($pc)]} {
+		set pos_to_bpcount($pc) 0
+	}
+	incr pos_to_bpcount($pc)
+	
+# If there's a window for this file, update it
+
+	if {[info exists wins($file)]} {
+		insert_breakpoint_tag $wins($file) $line
+	}
+
+# If there's an assembly window, update that too
+
+	set win [asm_win_name $cfunc]
+	if {[winfo exists $win]} {
+		insert_breakpoint_tag $win [pc_to_line $pclist($cfunc) $pc]
+	}
+
+# Update the breakpoints window
+
+	add_breakpoint_frame $bpnum
+}
+
+#
+# Local procedure:
+#
+#	delete_breakpoint (bpnum file line pc) - Delete breakpoint info from TK land
+#
+# Description:
+#
+#	GDB calls this indirectly (through gdbtk_tcl_breakpoint) to notify TK
+#	land of breakpoint destruction.  This consists of removing the file and
+#	line number from the breakpoint_file and breakpoint_line arrays.  Also,
+#	if there is already a window associated with FILE, the tags are removed
+#	from it.
+#
+
+proc delete_breakpoint {bpnum file line pc} {
+	global wins
+	global breakpoint_file
+	global breakpoint_line
+	global pos_to_breakpoint
+	global pos_to_bpcount
+	global cfunc pclist
+
+# Save line number and file for later
+
+	set line $breakpoint_line($bpnum)
+
+	set file $breakpoint_file($bpnum)
+
+# Reset breakpoint annotation info
+
+	if {$pos_to_bpcount($file:$line) > 0} {
+		decr pos_to_bpcount($file:$line)
+
+		if {$pos_to_bpcount($file:$line) == 0} {
+			catch "unset pos_to_breakpoint($file:$line)"
+
+			unset breakpoint_file($bpnum)
+			unset breakpoint_line($bpnum)
+
+# If there's a window for this file, update it
+
+			if {[info exists wins($file)]} {
+				delete_breakpoint_tag $wins($file) $line
+			}
+		}
+	}
+
+# If there's an assembly window, update that too
+
+	if {$pos_to_bpcount($pc) > 0} {
+		decr pos_to_bpcount($pc)
+
+		if {$pos_to_bpcount($pc) == 0} {
+			catch "unset pos_to_breakpoint($pc)"
+
+			set win [asm_win_name $cfunc]
+			if {[winfo exists $win]} {
+				delete_breakpoint_tag $win [pc_to_line $pclist($cfunc) $pc]
+			}
+		}
+	}
+
+	delete_breakpoint_frame $bpnum
+}
+
+#
+# Local procedure:
+#
+#	enable_breakpoint (bpnum file line pc) - Record breakpoint info in TK land
+#
+# Description:
+#
+#	GDB calls this indirectly (through gdbtk_tcl_breakpoint) to notify TK
+#	land of a breakpoint being enabled.  This consists of unstippling the
+#	specified breakpoint indicator.
+#
+
+proc enable_breakpoint {bpnum file line pc} {
+	global wins
+	global cfunc pclist
+	global enabled
+
+	if {[info exists wins($file)]} {
+		$wins($file) tag configure $line -fgstipple {}
+	}
+
+# If there's an assembly window, update that too
+
+	set win [asm_win_name $cfunc]
+	if {[winfo exists $win]} {
+		$win tag configure [pc_to_line $pclist($cfunc) $pc] -fgstipple {}
+	}
+
+# If there's a breakpoint window, update that too
+
+	if {[winfo exists .breakpoints]} {
+		set enabled($bpnum) 1
+	}
+}
+
+#
+# Local procedure:
+#
+#	disable_breakpoint (bpnum file line pc) - Record breakpoint info in TK land
+#
+# Description:
+#
+#	GDB calls this indirectly (through gdbtk_tcl_breakpoint) to notify TK
+#	land of a breakpoint being disabled.  This consists of stippling the
+#	specified breakpoint indicator.
+#
+
+proc disable_breakpoint {bpnum file line pc} {
+	global wins
+	global cfunc pclist
+	global enabled
+
+	if {[info exists wins($file)]} {
+		$wins($file) tag configure $line -fgstipple gray50
+	}
+
+# If there's an assembly window, update that too
+
+	set win [asm_win_name $cfunc]
+	if {[winfo exists $win]} {
+		$win tag configure [pc_to_line $pclist($cfunc) $pc] -fgstipple gray50
+	}
+
+# If there's a breakpoint window, update that too
+
+	if {[winfo exists .breakpoints]} {
+		set enabled($bpnum) 0
+	}
+}
+
+#
+# Local procedure:
+#
+#	insert_breakpoint_tag (win line) - Insert a breakpoint tag in WIN.
+#
+# Description:
+#
+#	GDB calls this indirectly (through gdbtk_tcl_breakpoint) to insert a
+#	breakpoint tag into window WIN at line LINE.
+#
+
+proc insert_breakpoint_tag {win line} {
+	$win configure -state normal
+	$win delete $line.0
+	$win insert $line.0 "B"
+	$win tag add margin $line.0 $line.8
+
+	$win configure -state disabled
+}
+
+#
+# Local procedure:
+#
+#	delete_breakpoint_tag (win line) - Remove a breakpoint tag from WIN.
+#
+# Description:
+#
+#	GDB calls this indirectly (through gdbtk_tcl_breakpoint) to remove a
+#	breakpoint tag from window WIN at line LINE.
+#
+
+proc delete_breakpoint_tag {win line} {
+	$win configure -state normal
+	$win delete $line.0
+	if {[string range $win 0 3] == ".src"} then {
+		$win insert $line.0 "\xa4"
+	} else {
+		$win insert $line.0 " "
+	}
+	$win tag add margin $line.0 $line.8
+	$win configure -state disabled
+}
+
+proc gdbtk_tcl_busy {} {
+	if {[winfo exists .cmd]} {
+		.cmd.text configure -state disabled
+	}
+	if {[winfo exists .src]} {
+		.src.start configure -state disabled
+		.src.stop configure -state normal
+		.src.step configure -state disabled
+		.src.next configure -state disabled
+		.src.continue configure -state disabled
+		.src.finish configure -state disabled
+		.src.up configure -state disabled
+		.src.down configure -state disabled
+		.src.bottom configure -state disabled
+	}
+	if {[winfo exists .asm]} {
+		.asm.stepi configure -state disabled
+		.asm.nexti configure -state disabled
+		.asm.continue configure -state disabled
+		.asm.finish configure -state disabled
+		.asm.up configure -state disabled
+		.asm.down configure -state disabled
+		.asm.bottom configure -state disabled
+	}
+	return
+}
+
+proc gdbtk_tcl_idle {} {
+	if {[winfo exists .cmd]} {
+		.cmd.text configure -state normal
+	}
+	if {[winfo exists .src]} {
+		.src.start configure -state normal
+		.src.stop configure -state disabled
+		.src.step configure -state normal
+		.src.next configure -state normal
+		.src.continue configure -state normal
+		.src.finish configure -state normal
+		.src.up configure -state normal
+		.src.down configure -state normal
+		.src.bottom configure -state normal
+	}
+	if {[winfo exists .asm]} {
+		.asm.stepi configure -state normal
+		.asm.nexti configure -state normal
+		.asm.continue configure -state normal
+		.asm.finish configure -state normal
+		.asm.up configure -state normal
+		.asm.down configure -state normal
+		.asm.bottom configure -state normal
+	}
+	return
+}
+
+#
+# Local procedure:
+#
+#	pc_to_line (pclist pc) - convert PC to a line number.
+#
+# Description:
+#
+#	Convert PC to a line number from PCLIST.  If exact line isn't found,
+#	we return the first line that starts before PC.
+#
+proc pc_to_line {pclist pc} {
+	set line [lsearch -exact $pclist $pc]
+
+	if {$line >= 1} { return $line }
+
+	set line 1
+	foreach linepc [lrange $pclist 1 end] {
+		if {$pc < $linepc} { decr line ; return $line }
+		incr line
+	}
+	return [expr {$line - 1}]
+}
+
+#
+# Menu:
+#
+#	file popup menu - Define the file popup menu.
+#
+# Description:
+#
+#	This menu just contains a bunch of buttons that do various things to
+#	the line under the cursor.
+#
+# Items:
+#
+#	Edit - Run the editor (specified by the environment variable EDITOR) on
+#	       this file, at the current line.
+#	Breakpoint - Set a breakpoint at the current line.  This just shoves
+#		a `break' command at GDB with the appropriate file and line
+#		number.  Eventually, GDB calls us back (at gdbtk_tcl_breakpoint)
+#		to notify us of where the breakpoint needs to show up.
+#
+
+menu .file_popup -cursor hand2 -tearoff 0
+.file_popup add command -label "Not yet set" -state disabled
+.file_popup add separator
+.file_popup add command -label "Edit" \
+  -command {exec $editor +$selected_line $selected_file &}
+.file_popup add command -label "Set breakpoint" \
+  -command {gdb_cmd "break $selected_file:$selected_line"}
+
+# Use this procedure to get the GDB core to execute the string `cmd'.  This is
+# a wrapper around gdb_cmd, which will catch errors, and send output to the
+# command window.  It will also cause all of the other windows to be updated.
+
+proc interactive_cmd {cmd} {
+	catch {gdb_cmd "$cmd"} result
+	.cmd.text insert end $result
+	.cmd.text see end
+	update_ptr
+}
+
+#
+# Bindings:
+#
+#	file popup menu - Define the file popup menu bindings.
+#
+# Description:
+#
+#	This defines the binding for the file popup menu.  It simply
+#       unhighlights the line under the cursor.
+#
+
+bind .file_popup <Any-ButtonRelease-1> {
+  global selected_win
+  # Unhighlight the selected line
+  $selected_win tag delete breaktag
+}
+
+#
+# Local procedure:
+#
+#	listing_window_popup (win x y xrel yrel) - Handle popups for listing window
+#
+# Description:
+#
+#	This procedure is invoked by holding down button 2 (usually) in the
+#	listing window.  The action taken depends upon where the button was
+#	pressed.  If it was in the left margin (the breakpoint column), it
+#	sets or clears a breakpoint.  In the main text area, it will pop up a
+#	menu.
+#
+
+proc listing_window_popup {win x y xrel yrel} {
+	global wins
+	global win_to_file
+	global file_to_debug_file
+	global highlight
+	global selected_line
+	global selected_file
+	global selected_win
+	global pos_to_breakpoint
+
+# Map TK window name back to file name.
+
+	set file $win_to_file($win)
+
+	set pos [split [$win index @$xrel,$yrel] .]
+
+# Record selected file and line for menu button actions
+
+	set selected_file $file_to_debug_file($file)
+	set selected_line [lindex $pos 0]
+	set selected_col [lindex $pos 1]
+	set selected_win $win
+
+# Post the menu near the pointer, (and grab it)
+
+	.file_popup entryconfigure 0 -label "$selected_file:$selected_line"
+
+        tk_popup .file_popup $x $y
+}
+
+#
+# Local procedure:
+#
+#	toggle_breakpoint (win x y xrel yrel) - Handle clicks on breakdots
+#
+# Description:
+#
+#	This procedure sets or clears breakpoints where the button clicked.
+#
+
+proc toggle_breakpoint {win x y xrel yrel} {
+	global wins
+	global win_to_file
+	global file_to_debug_file
+	global highlight
+	global selected_line
+	global selected_file
+	global selected_win
+	global pos_to_breakpoint
+
+# Map TK window name back to file name.
+
+	set file $win_to_file($win)
+
+	set pos [split [$win index @$xrel,$yrel] .]
+
+# Record selected file and line
+
+	set selected_file $file_to_debug_file($file)
+	set selected_line [lindex $pos 0]
+	set selected_col [lindex $pos 1]
+	set selected_win $win
+
+# If we're in the margin, then toggle the breakpoint
+
+	if {$selected_col < 8} {  # this is alway true actually
+              set pos_break $selected_file:$selected_line
+              set pos $file:$selected_line
+              set tmp pos_to_breakpoint($pos)
+              if {[info exists $tmp]} {
+                      set bpnum [set $tmp]
+                      gdb_cmd "delete $bpnum"
+              } else {
+                      gdb_cmd "break $pos_break"
+              }
+              return
+	}
+}
+
+#
+# Local procedure:
+#
+#	asm_window_button_1 (win x y xrel yrel) - Handle button 1 in asm window
+#
+# Description:
+#
+#	This procedure is invoked as a result of holding down button 1 in the
+#	assembly window.  The action taken depends upon where the button was
+#	pressed.  If it was in the left margin (the breakpoint column), it
+#	sets or clears a breakpoint.  In the main text area, it will pop up a
+#	menu.
+#
+
+proc asm_window_button_1 {win x y xrel yrel} {
+	global wins
+	global win_to_file
+	global file_to_debug_file
+	global highlight
+	global selected_line
+	global selected_file
+	global selected_win
+	global pos_to_breakpoint
+	global pclist
+	global cfunc
+
+	set pos [split [$win index @$xrel,$yrel] .]
+
+# Record selected file and line for menu button actions
+
+	set selected_line [lindex $pos 0]
+	set selected_col [lindex $pos 1]
+	set selected_win $win
+
+# Figure out the PC
+
+	set pc [lindex $pclist($cfunc) $selected_line]
+
+# If we're in the margin, then toggle the breakpoint
+
+	if {$selected_col < 11} {
+		set tmp pos_to_breakpoint($pc)
+		if {[info exists $tmp]} {
+			set bpnum [set $tmp]
+			gdb_cmd "delete	$bpnum"
+		} else {
+			gdb_cmd "break *$pc"
+		}
+		return
+	}
+
+# Post the menu near the pointer, (and grab it)
+
+#	.file_popup entryconfigure 0 -label "$selected_file:$selected_line"
+#	.file_popup post [expr $x-[winfo width .file_popup]/2] [expr $y-10]
+#	grab .file_popup
+}
+
+#
+# Local procedure:
+#
+#	do_nothing - Does absolutely nothing.
+#
+# Description:
+#
+#	This procedure does nothing.  It is used as a placeholder to allow
+#	the disabling of bindings that would normally be inherited from the
+#	parent widget.  I can't think of any other way to do this.
+#
+
+proc do_nothing {} {}
+
+#
+# Local procedure:
+#
+#	not_implemented_yet - warn that a feature is unavailable
+#
+# Description:
+#
+#	This procedure warns that something doesn't actually work yet.
+#
+
+proc not_implemented_yet {message} {
+	tk_dialog .unimpl "gdb : unimpl" \
+		"$message: not implemented in the interface yet" \
+		warning 0 "OK"
+}
+
+##
+# Local procedure:
+#
+#	create_expr_window - Create expression display window
+#
+# Description:
+#
+#	Create the expression display window.
+#
+
+# Set delete_expr_num, and set -state of Delete button.
+proc expr_update_button {num} {
+  global delete_expr_num
+  set delete_expr_num $num
+  if {$num > 0} then {
+    set state normal
+  } else {
+    set state disabled
+  }
+  .expr.buts.delete configure -state $state
+}
+
+proc add_expr {expr} {
+  global expr_update_list
+  global expr_num
+
+  incr expr_num
+
+  set e .expr.exprs
+  set f e$expr_num
+
+  checkbutton $e.updates.$f -text "" -relief flat \
+    -variable expr_update_list($expr_num)
+  text $e.expressions.$f -width 20 -height 1
+  $e.expressions.$f insert 0.0 $expr
+  bind $e.expressions.$f <1> "update_expr $expr_num"
+  text $e.values.$f -width 20 -height 1
+
+  # Set up some bindings.
+  foreach frame {updates expressions values} {
+    bind $e.$frame.$f <FocusIn> "expr_update_button $expr_num"
+    bind $e.$frame.$f <FocusOut> "expr_update_button 0"
+  }
+
+  update_expr $expr_num
+
+  pack $e.updates.$f -side top
+  pack $e.expressions.$f -side top -expand yes -fill x
+  pack $e.values.$f -side top -expand yes -fill x
+}
+
+proc delete_expr {} {
+  global delete_expr_num
+  global expr_update_list
+
+  if {$delete_expr_num > 0} then {
+    set e .expr.exprs
+    set f e${delete_expr_num}
+
+    destroy $e.updates.$f $e.expressions.$f $e.values.$f
+    unset expr_update_list($delete_expr_num)
+  }
+}
+
+proc update_expr {expr_num} {
+  global expr_update_list
+
+  set e .expr.exprs
+  set f e${expr_num}
+
+  set expr [$e.expressions.$f get 0.0 end]
+  $e.values.$f delete 0.0 end
+  if {! [catch {gdb_eval $expr} val]} {
+    $e.values.$f insert 0.0 $val
+  } {
+    # FIXME consider flashing widget here.
+  }
+}
+
+proc update_exprs {} {
+	global expr_update_list
+
+	foreach expr_num [array names expr_update_list] {
+		if {$expr_update_list($expr_num)} {
+			update_expr $expr_num
+		}
+	}
+}
+
+proc create_expr_window {} {
+	global expr_num
+	global delete_expr_num
+	global expr_update_list
+
+	if {[winfo exists .expr]} {raise .expr ; return}
+
+	# All the state about individual expressions is stored in the
+	# expression window widgets, so when it is deleted, the
+	# previous values of the expression global variables become
+	# invalid.  Reset to a known initial state.
+	set expr_num 0
+	set delete_expr_num 0
+	catch {unset expr_update_list}
+	set expr_update_list(0) 0
+
+	toplevel .expr
+	wm title .expr "GDB Expressions"
+	wm iconname .expr "Expressions"
+
+	frame .expr.entryframe -borderwidth 2 -relief raised
+	label .expr.entryframe.entrylab -text "Expression: "
+	entry .expr.entryframe.entry -borderwidth 2 -relief sunken
+	bind .expr.entryframe.entry <Return> {
+	  add_expr [.expr.entryframe.entry get]
+	  .expr.entryframe.entry delete 0 end
+	}
+
+	pack .expr.entryframe.entrylab -side left
+	pack .expr.entryframe.entry -side left -fill x -expand yes
+
+	frame .expr.buts -borderwidth 2 -relief raised
+
+	button .expr.buts.delete -text Delete -command delete_expr \
+	  -state disabled
+
+	button .expr.buts.close -text Close -command {destroy .expr}
+	button .expr.buts.help -text Help -state disabled
+
+	pack .expr.buts.delete -side left
+	pack .expr.buts.help .expr.buts.close -side right
+
+	pack .expr.buts -side bottom -fill x
+	pack .expr.entryframe -side bottom -fill x
+
+	frame .expr.exprs -borderwidth 2 -relief raised
+
+	# Use three subframes so columns will line up.  Easier than
+	# dealing with BLT for a table geometry manager.  Someday Tk
+	# will have one, use it then.  FIXME this messes up keyboard
+	# traversal.
+	frame .expr.exprs.updates -borderwidth 0 -relief flat
+	frame .expr.exprs.expressions -borderwidth 0 -relief flat
+	frame .expr.exprs.values -borderwidth 0 -relief flat
+
+	label .expr.exprs.updates.label -text Update
+	pack .expr.exprs.updates.label -side top -anchor w
+	label .expr.exprs.expressions.label -text Expression
+	pack .expr.exprs.expressions.label -side top -anchor w
+	label .expr.exprs.values.label -text Value
+	pack .expr.exprs.values.label -side top -anchor w
+
+	pack .expr.exprs.updates -side left
+	pack .expr.exprs.values .expr.exprs.expressions \
+	  -side right -expand 1 -fill x
+
+	pack .expr.exprs -side top -fill both -expand 1 -anchor w
+}
+
+#
+# Local procedure:
+#
+#	display_expression (expression) - Display EXPRESSION in display window
+#
+# Description:
+#
+#	Display EXPRESSION and its value in the expression display window.
+#
+
+proc display_expression {expression} {
+	create_expr_window
+
+	add_expr $expression
+}
+
+#
+# Local procedure:
+#
+#	create_file_win (filename) - Create a win for FILENAME.
+#
+# Return value:
+#
+#	The new text widget.
+#
+# Description:
+#
+#	This procedure creates a text widget for FILENAME.  It returns the
+#	newly created widget.  First, a text widget is created, and given basic
+#	configuration info.  Second, all the bindings are setup.  Third, the
+#	file FILENAME is read into the text widget.  Fourth, margins and line
+#	numbers are added.
+#
+
+proc create_file_win {filename debug_file} {
+	global breakpoint_file
+	global breakpoint_line
+	global line_numbers
+	global debug_interface
+
+# Replace all the dirty characters in $filename with clean ones, and generate
+# a unique name for the text widget.
+
+	regsub -all {\.} $filename {} temp
+	set win .src.text$temp
+
+# Open the file, and read it into the text widget
+
+	if {[catch "open $filename" fh]} {
+# File can't be read.  Put error message into .src.nofile window and return.
+
+		catch {destroy .src.nofile}
+		text .src.nofile -height 25 -width 88 -relief sunken \
+			-borderwidth 2 -yscrollcommand ".src.scroll set" \
+			-setgrid true -cursor hand2
+		.src.nofile insert 0.0 $fh
+		.src.nofile configure -state disabled
+		bind .src.nofile <1> do_nothing
+		bind .src.nofile <B1-Motion> do_nothing
+		return .src.nofile
+	}
+
+# Actually create and do basic configuration on the text widget.
+
+	text $win -height 25 -width 88 -relief sunken -borderwidth 2 \
+		-yscrollcommand ".src.scroll set" -setgrid true -cursor hand2
+
+# Setup all the bindings
+
+	bind $win <Enter> {focus %W}
+	bind $win <1> do_nothing
+	bind $win <B1-Motion> do_nothing
+
+	bind $win <Key-Alt_R> do_nothing
+	bind $win <Key-Alt_L> do_nothing
+	bind $win <Key-Prior> "$win yview {@0,0 - 10 lines}"
+	bind $win <Key-Next> "$win yview {@0,0 + 10 lines}"
+	bind $win <Key-Up> "$win yview {@0,0 - 1 lines}"
+	bind $win <Key-Down> "$win yview {@0,0 + 1 lines}"
+	bind $win <Key-Home> {update_listing [gdb_loc]}
+	bind $win <Key-End> "$win see end"
+
+	bind $win n {interactive_cmd next}
+	bind $win s {interactive_cmd step}
+	bind $win c {interactive_cmd continue}
+	bind $win f {interactive_cmd finish}
+	bind $win u {interactive_cmd up}
+	bind $win d {interactive_cmd down}
+
+	if $debug_interface {
+	    bind $win <Control-C> {
+		puts stdout burp
+	    }
+	}
+
+	$win delete 0.0 end
+	$win insert 0.0 [read $fh]
+	close $fh
+
+# Add margins (for annotations) and a line number to each line (if requested)
+
+	set numlines [$win index end]
+	set numlines [lindex [split $numlines .] 0]
+	if {$line_numbers} {
+		for {set i 1} {$i <= $numlines} {incr i} {
+			$win insert $i.0 [format "   %4d " $i]
+			$win tag add source $i.8 "$i.0 lineend"
+			}
+	} else {
+		for {set i 1} {$i <= $numlines} {incr i} {
+			$win insert $i.0 "        "
+			$win tag add source $i.8 "$i.0 lineend"
+			}
+	}
+
+# Add the breakdots
+
+	foreach i [gdb_sourcelines $debug_file] {
+		$win delete $i.0
+		$win insert $i.0 "\xa4"
+		$win tag add margin $i.0 $i.8
+		}
+
+	# A debugging trick to highlight sensitive regions.
+	if $debug_interface {
+	    $win tag bind source <Enter> {
+		%W tag configure source -background yellow
+	    }
+	    $win tag bind source <Leave> {
+		%W tag configure source -background green
+	    }
+	    $win tag bind margin <Enter> {
+		%W tag configure margin -background red
+	    }
+	    $win tag bind margin <Leave> {
+		%W tag configure margin -background skyblue
+	    }
+	}
+
+	$win tag bind margin <1> {
+		toggle_breakpoint %W %X %Y %x %y
+		}
+
+	$win tag bind source <1> {
+		%W mark set anchor "@%x,%y wordstart"
+		set last [%W index "@%x,%y wordend"]
+		%W tag remove sel 0.0 anchor
+		%W tag remove sel $last end
+		%W tag add sel anchor $last
+		}
+#	$win tag bind source <Double-Button-1> {
+#		%W mark set anchor "@%x,%y wordstart"
+#		set last [%W index "@%x,%y wordend"]
+#		%W tag remove sel 0.0 anchor
+#		%W tag remove sel $last end
+#		%W tag add sel anchor $last
+#		echo "Selected [selection get]"
+#		}
+	$win tag bind source <B1-Motion> {
+		%W tag remove sel 0.0 anchor
+		%W tag remove sel $last end
+		%W tag add sel anchor @%x,%y
+		}
+	$win tag bind sel <1> break
+	$win tag bind sel <Double-Button-1> {
+	    display_expression [selection get]
+	    break
+	}
+        $win tag bind sel <B1-Motion> break
+	$win tag lower sel
+
+	$win tag bind source <2> {
+		listing_window_popup %W %X %Y %x %y
+		}
+
+        # Make these bindings do nothing on the text window -- they
+	# are completely handled by the tag bindings above.
+        bind $win <1> break
+        bind $win <B1-Motion> break
+        bind $win <Double-Button-1> break
+
+# Scan though the breakpoint data base and install any destined for this file
+
+	foreach bpnum [array names breakpoint_file] {
+		if {$breakpoint_file($bpnum) == $filename} {
+			insert_breakpoint_tag $win $breakpoint_line($bpnum)
+			}
+		}
+
+# Disable the text widget to prevent user modifications
+
+	$win configure -state disabled
+	return $win
+}
+
+#
+# Local procedure:
+#
+#	create_asm_win (funcname pc) - Create an assembly win for FUNCNAME.
+#
+# Return value:
+#
+#	The new text widget.
+#
+# Description:
+#
+#	This procedure creates a text widget for FUNCNAME.  It returns the
+#	newly created widget.  First, a text widget is created, and given basic
+#	configuration info.  Second, all the bindings are setup.  Third, the
+#	function FUNCNAME is read into the text widget.
+#
+
+proc create_asm_win {funcname pc} {
+	global breakpoint_file
+	global breakpoint_line
+	global pclist
+	global disassemble_with_source
+
+# Replace all the dirty characters in $filename with clean ones, and generate
+# a unique name for the text widget.
+
+	set win [asm_win_name $funcname]
+
+# Actually create and do basic configuration on the text widget.
+
+	text $win -height 25 -width 80 -relief sunken -borderwidth 2 \
+		-setgrid true -cursor hand2 -yscrollcommand ".asm.scroll set"
+
+# Setup all the bindings
+
+	bind $win <Enter> {focus %W}
+        bind $win <1> {asm_window_button_1 %W %X %Y %x %y; break}
+	bind $win <B1-Motion> break
+        bind $win <Double-Button-1> break
+
+	bind $win <Key-Alt_R> do_nothing
+	bind $win <Key-Alt_L> do_nothing
+
+	bind $win n {interactive_cmd nexti}
+	bind $win s {interactive_cmd stepi}
+	bind $win c {interactive_cmd continue}
+	bind $win f {interactive_cmd finish}
+	bind $win u {interactive_cmd up}
+	bind $win d {interactive_cmd down}
+
+# Disassemble the code, and read it into the new text widget
+
+	$win insert end [gdb_disassemble $disassemble_with_source $pc]
+
+	set numlines [$win index end]
+	set numlines [lindex [split $numlines .] 0]
+	decr numlines
+
+# Delete the first and last lines, cuz these contain useless info
+
+#	$win delete 1.0 2.0
+#	$win delete {end - 1 lines} end
+#	decr numlines 2
+
+# Add margins (for annotations) and note the PC for each line
+
+	catch "unset pclist($funcname)"
+	lappend pclist($funcname) Unused
+	for {set i 1} {$i <= $numlines} {incr i} {
+		scan [$win get $i.0 "$i.0 lineend"] "%s " pc
+		lappend pclist($funcname) $pc
+		$win insert $i.0 "    "
+		}
+
+# Scan though the breakpoint data base and install any destined for this file
+
+#	foreach bpnum [array names breakpoint_file] {
+#		if {$breakpoint_file($bpnum) == $filename} {
+#			insert_breakpoint_tag $win $breakpoint_line($bpnum)
+#			}
+#		}
+
+# Disable the text widget to prevent user modifications
+
+	$win configure -state disabled
+	return $win
+}
+
+#
+# Local procedure:
+#
+#	update_listing (linespec) - Update the listing window according to
+#				    LINESPEC.
+#
+# Description:
+#
+#	This procedure is called from various places to update the listing
+#	window based on LINESPEC.  It is usually invoked with the result of
+#	gdb_loc.
+#
+#	It will move the cursor, and scroll the text widget if necessary.
+#	Also, it will switch to another text widget if necessary, and update
+#	the label widget too.
+#
+#	LINESPEC is a list of the form:
+#
+#	{ DEBUG_FILE FUNCNAME FILENAME LINE }, where:
+#
+#	DEBUG_FILE - is the abbreviated form of the file name.  This is usually
+#		     the file name string given to the cc command.  This is
+#		     primarily needed for breakpoint commands, and when an
+#		     abbreviated for of the filename is desired.
+#	FUNCNAME - is the name of the function.
+#	FILENAME - is the fully qualified (absolute) file name.  It is usually
+#		   the same as $PWD/$DEBUG_FILE, where PWD is the working dir
+#		   at the time the cc command was given.  This is used to
+#		   actually locate the file to be displayed.
+#	LINE - The line number to be displayed.
+#
+#	Usually, this procedure will just move the cursor one line down to the
+#	next line to be executed.  However, if the cursor moves out of range
+#	or into another file, it will scroll the text widget so that the line
+#	of interest is in the middle of the viewable portion of the widget.
+#
+
+proc update_listing {linespec} {
+	global pointers
+	global wins cfile
+	global current_label
+	global win_to_file
+	global file_to_debug_file
+	global .src.label
+
+# Rip the linespec apart
+
+        lassign $linespec debug_file funcname filename line
+
+# Sometimes there's no source file for this location
+
+	if {$filename == ""} {set filename Blank}
+
+# If we want to switch files, we need to unpack the current text widget, and
+# stick in the new one.
+
+	if {$filename != $cfile} then {
+		pack forget $wins($cfile)
+		set cfile $filename
+
+# Create a text widget for this file if necessary
+
+		if {![info exists wins($cfile)]} then {
+			set wins($cfile) [create_file_win $cfile $debug_file]
+			if {$wins($cfile) != ".src.nofile"} {
+				set win_to_file($wins($cfile)) $cfile
+				set file_to_debug_file($cfile) $debug_file
+				set pointers($cfile) 1.1
+				}
+			}
+
+# Pack the text widget into the listing widget, and scroll to the right place
+
+		pack $wins($cfile) -side left -expand yes -in .src.info \
+			-fill both -after .src.scroll
+
+# Make the scrollbar point at the new text widget
+
+		.src.scroll configure -command "$wins($cfile) yview"
+
+	         # $wins($cfile) see "${line}.0 linestart"
+	         ensure_line_visible $wins($cfile) $line
+		}
+
+# Update the label widget in case the filename or function name has changed
+
+	if {$current_label != "$filename.$funcname"} then {
+		set tail [expr [string last / $filename] + 1]
+		set .src.label "[string range $filename $tail end] : ${funcname}()"
+#		.src.label configure -text "[string range $filename $tail end] : ${funcname}()"
+		set current_label $filename.$funcname
+		}
+
+# Update the pointer, scrolling the text widget if necessary to keep the
+# pointer in an acceptable part of the screen.
+
+	if {[info exists pointers($cfile)]} then {
+		$wins($cfile) configure -state normal
+		set pointer_pos $pointers($cfile)
+		$wins($cfile) configure -state normal
+		$wins($cfile) delete $pointer_pos "$pointer_pos + 2 char"
+		$wins($cfile) insert $pointer_pos "  "
+
+		set pointer_pos [$wins($cfile) index $line.1]
+		set pointers($cfile) $pointer_pos
+
+		$wins($cfile) delete $pointer_pos "$pointer_pos + 2 char"
+		$wins($cfile) insert $pointer_pos "->"
+	        ensure_line_visible $wins($cfile) $line
+		$wins($cfile) configure -state disabled
+		}
+}
+
+#
+# Local procedure:
+#
+#	create_asm_window - Open up the assembly window.
+#
+# Description:
+#
+#	Create an assembly window if it doesn't exist.
+#
+
+proc create_asm_window {} {
+	global cfunc
+
+	if {[winfo exists .asm]} {raise .asm ; return}
+
+	set cfunc *None*
+	set win [asm_win_name $cfunc]
+
+	build_framework .asm Assembly "*NIL*"
+
+# First, delete all the old menu entries
+
+	.asm.menubar.view.menu delete 0 last
+
+	.asm.text configure -yscrollcommand ".asm.scroll set"
+
+	frame .asm.row1
+	frame .asm.row2
+
+	button .asm.stepi -width 6 -text Stepi \
+		-command {interactive_cmd stepi}
+	button .asm.nexti -width 6 -text Nexti \
+		-command {interactive_cmd nexti}
+	button .asm.continue -width 6 -text Cont \
+		-command {interactive_cmd continue}
+	button .asm.finish -width 6 -text Finish \
+		-command {interactive_cmd finish}
+	button .asm.up -width 6 -text Up -command {interactive_cmd up}
+	button .asm.down -width 6 -text Down \
+		-command {interactive_cmd down}
+	button .asm.bottom -width 6 -text Bottom \
+		-command {interactive_cmd {frame 0}}
+
+	pack .asm.stepi .asm.continue .asm.up .asm.bottom -side left -padx 3 -pady 5 -in .asm.row1
+	pack .asm.nexti .asm.finish .asm.down -side left -padx 3 -pady 5 -in .asm.row2
+
+	pack .asm.row2 .asm.row1 -side bottom -anchor w -before .asm.info
+
+	update
+
+	update_assembly [gdb_loc]
+
+# We do this update_assembly to get the proper value of disassemble-from-exec.
+
+# exec file menu item
+	.asm.menubar.view.menu add radiobutton -label "Exec file" \
+		-variable disassemble-from-exec -value 1
+# target memory menu item
+	.asm.menubar.view.menu add radiobutton -label "Target memory" \
+		-variable disassemble-from-exec -value 0
+
+# Disassemble with source
+	.asm.menubar.view.menu add checkbutton -label "Source" \
+		-variable disassemble_with_source -onvalue source \
+		-offvalue nosource -command {
+			foreach asm [info command .asm.func_*] {
+				destroy $asm
+				}
+			set cfunc NIL
+			update_assembly [gdb_loc]
+		}
+}
+
+proc reg_config_menu {} {
+    	catch {destroy .reg.config}
+	toplevel .reg.config
+	wm geometry .reg.config +300+300
+	wm title .reg.config "Register configuration"
+	wm iconname .reg.config "Reg config"
+	set regnames [gdb_regnames]
+	set num_regs [llength $regnames]
+
+	frame .reg.config.buts
+
+	button .reg.config.done -text " Done " -command "
+		recompute_reg_display_list $num_regs
+		populate_reg_window
+		update_registers all
+		destroy .reg.config "
+
+	button .reg.config.update -text Update -command "
+		recompute_reg_display_list $num_regs
+		populate_reg_window
+		update_registers all "
+
+	pack .reg.config.buts -side bottom -fill x
+
+	pack .reg.config.done -side left -fill x -expand yes -in .reg.config.buts
+	pack .reg.config.update -side right -fill x -expand yes -in .reg.config.buts
+
+# Since there can be lots of registers, we build the window with no more than
+# 32 rows, and as many columns as needed.
+
+# First, figure out how many columns we need and create that many column frame
+# widgets
+
+	set ncols [expr ($num_regs + 31) / 32]
+
+	for {set col 0} {$col < $ncols} {incr col} {
+		frame .reg.config.col$col
+		pack .reg.config.col$col -side left -anchor n
+	}
+
+# Now, create the checkbutton widgets and pack them in the appropriate columns
+
+	set col 0
+	set row 0
+	for {set regnum 0} {$regnum < $num_regs} {incr regnum} {
+		set regname [lindex $regnames $regnum]
+		checkbutton .reg.config.col$col.$row -text $regname -pady 0 \
+			-variable regena($regnum) -relief flat -anchor w -bd 1
+
+		pack .reg.config.col$col.$row -side top -fill both
+
+		incr row
+		if {$row >= 32} {
+			incr col
+			set row 0
+		}
+	}
+}
+
+#
+# Local procedure:
+#
+#	create_registers_window - Open up the register display window.
+#
+# Description:
+#
+#	Create the register display window, with automatic updates.
+#
+
+proc create_registers_window {} {
+    global reg_format_natural
+    global reg_format_decimal
+    global reg_format_hex
+    global reg_format_octal
+    global reg_format_raw
+    global reg_format_binary
+    global reg_format_unsigned
+
+    # If we already have a register window, just use that one.
+
+    if {[winfo exists .reg]} {raise .reg ; return}
+
+    # Create an initial register display list consisting of all registers
+
+    init_reg_info
+
+    build_framework .reg Registers
+
+    # First, delete all the old menu entries
+
+    .reg.menubar.view.menu delete 0 last
+
+    # Natural menu item
+    .reg.menubar.view.menu add checkbutton -label $reg_format_natural(label) \
+	    -variable reg_format_natural(enable) -onvalue on -offvalue off \
+	    -command {update_registers redraw}
+
+    # Decimal menu item
+    .reg.menubar.view.menu add checkbutton -label $reg_format_decimal(label) \
+	    -variable reg_format_decimal(enable) -onvalue on -offvalue off \
+	    -command {update_registers redraw}
+
+    # Hex menu item
+    .reg.menubar.view.menu add checkbutton -label $reg_format_hex(label) \
+	    -variable reg_format_hex(enable) -onvalue on -offvalue off \
+	    -command {update_registers redraw}
+
+    # Octal menu item
+    .reg.menubar.view.menu add checkbutton -label $reg_format_octal(label) \
+	    -variable reg_format_octal(enable) -onvalue on -offvalue off \
+	    -command {update_registers redraw}
+
+    # Binary menu item
+    .reg.menubar.view.menu add checkbutton -label $reg_format_binary(label) \
+	    -variable reg_format_binary(enable) -onvalue on -offvalue off \
+	    -command {update_registers redraw}
+
+    # Unsigned menu item
+    .reg.menubar.view.menu add checkbutton -label $reg_format_unsigned(label) \
+	    -variable reg_format_unsigned(enable) -onvalue on -offvalue off \
+	    -command {update_registers redraw}
+
+    # Raw menu item
+    .reg.menubar.view.menu add checkbutton -label $reg_format_raw(label) \
+	    -variable reg_format_raw(enable) -onvalue on -offvalue off \
+	    -command {update_registers redraw}
+
+    # Config menu item
+    .reg.menubar.view.menu add separator
+
+    .reg.menubar.view.menu add command -label Config \
+	    -command { reg_config_menu }
+
+    destroy .reg.label
+
+    # Install the reg names
+
+    populate_reg_window
+    update_registers all
+}
+
+proc init_reg_info {} {
+    global reg_format_natural
+    global reg_format_decimal
+    global reg_format_hex
+    global reg_format_octal
+    global reg_format_raw
+    global reg_format_binary
+    global reg_format_unsigned
+    global long_size
+    global double_size
+
+    if {![info exists reg_format_hex]} {
+	global reg_display_list
+	global changed_reg_list
+	global regena
+
+	set long_size [lindex [gdb_cmd {p sizeof(long)}] 2]
+	set double_size [lindex [gdb_cmd {p sizeof(double)}] 2]
+
+	# The natural format may print floats or doubles as floating point,
+	# which typically takes more room that printing ints on the same
+	# machine.  We assume that if longs are 8 bytes that this is
+	# probably a 64 bit machine.  (FIXME)
+	set reg_format_natural(label) Natural
+	set reg_format_natural(enable) on
+	set reg_format_natural(format) {}
+	if {$long_size == 8} then {
+	    set reg_format_natural(width) 25
+	} else {
+	    set reg_format_natural(width) 16
+	}
+
+	set reg_format_decimal(label) Decimal
+	set reg_format_decimal(enable) off
+	set reg_format_decimal(format) d
+	if {$long_size == 8} then {
+	    set reg_format_decimal(width) 21
+	} else {
+	    set reg_format_decimal(width) 12
+	}
+
+	set reg_format_hex(label) Hex
+	set reg_format_hex(enable) off
+	set reg_format_hex(format) x
+	set reg_format_hex(width) [expr $long_size * 2 + 3]
+
+	set reg_format_octal(label) Octal
+	set reg_format_octal(enable) off
+	set reg_format_octal(format) o
+	set reg_format_octal(width) [expr $long_size * 8 / 3 + 3]
+
+	set reg_format_raw(label) Raw
+	set reg_format_raw(enable) off
+	set reg_format_raw(format) r
+	set reg_format_raw(width) [expr $double_size * 2 + 3]
+
+	set reg_format_binary(label) Binary
+	set reg_format_binary(enable) off
+	set reg_format_binary(format) t
+	set reg_format_binary(width) [expr $long_size * 8 + 1]
+
+	set reg_format_unsigned(label) Unsigned
+	set reg_format_unsigned(enable) off
+	set reg_format_unsigned(format) u
+	if {$long_size == 8} then {
+	    set reg_format_unsigned(width) 21
+	} else {
+	    set reg_format_unsigned(width) 11
+	}
+
+	set num_regs [llength [gdb_regnames]]
+	for {set regnum 0} {$regnum < $num_regs} {incr regnum} {
+	    set regena($regnum) 1
+	}
+	recompute_reg_display_list $num_regs
+	#set changed_reg_list $reg_display_list
+	set changed_reg_list {}
+    }
+}
+
+# Convert regena into a list of the enabled $regnums
+
+proc recompute_reg_display_list {num_regs} {
+	global reg_display_list
+	global regmap
+	global regena
+
+	catch {unset reg_display_list}
+	set reg_display_list {}
+
+	set line 2
+	for {set regnum 0} {$regnum < $num_regs} {incr regnum} {
+
+		if {[set regena($regnum)] != 0} {
+			lappend reg_display_list $regnum
+			set regmap($regnum) $line
+			incr line
+		}
+	}
+}
+
+# Fill out the register window with the names of the regs specified in
+# reg_display_list.
+
+proc populate_reg_window {} {
+    global reg_format_natural
+    global reg_format_decimal
+    global reg_format_hex
+    global reg_format_octal
+    global reg_format_raw
+    global reg_format_binary
+    global reg_format_unsigned
+    global max_regname_width
+    global reg_display_list
+
+    set win .reg.text
+    $win configure -state normal
+
+    # Clear the entire widget and insert a blank line at the top where
+    # the column labels will appear.
+    $win delete 0.0 end
+    $win insert end "\n"
+
+    if {[llength $reg_display_list] > 0} {
+	set regnames [eval gdb_regnames $reg_display_list]
+    } else {
+	set regnames {}
+    }
+
+    # Figure out the longest register name
+
+    set max_regname_width 0
+
+    foreach reg $regnames {
+	set len [string length $reg]
+	if {$len > $max_regname_width} {set max_regname_width $len}
+    }
+
+    set width [expr $max_regname_width + 15]
+
+    set height [expr [llength $regnames] + 1]
+
+    if {$height > 60} {set height 60}
+
+    $win configure -height $height -width $width
+    foreach reg $regnames {
+	$win insert end [format "%-*s\n" $width ${reg}]
+    }
+
+    #Delete the blank line left at end by last insertion.
+    if {[llength $regnames] > 0} {
+	$win delete {end - 1 char} end
+    }
+    $win yview 0
+    $win configure -state disabled
+}
+
+#
+# Local procedure:
+#
+#	update_registers - Update the registers window.
+#
+# Description:
+#
+#	This procedure updates the registers window according to the value of
+#	the "which" arg.
+#
+
+proc update_registers {which} {
+    global max_regname_width
+    global reg_format_natural
+    global reg_format_decimal
+    global reg_format_hex
+    global reg_format_octal
+    global reg_format_binary
+    global reg_format_unsigned
+    global reg_format_raw
+    global reg_display_list
+    global changed_reg_list
+    global highlight
+    global regmap
+
+    # margin is the column where we start printing values
+    set margin [expr $max_regname_width + 1]
+    set win .reg.text
+    $win configure -state normal
+
+    if {$which == "all" || $which == "redraw"} {
+	set display_list $reg_display_list
+	$win delete 1.0 1.end
+	$win insert 1.0 [format "%*s" $max_regname_width " "]
+	foreach format {natural decimal unsigned hex octal raw binary } {
+	    set field (enable)
+	    set var reg_format_$format$field
+	    if {[set $var] == "on"} {
+		set field (label)
+		set var reg_format_$format$field
+		set label [set $var]
+		set field (width)
+		set var reg_format_$format$field
+		set var [format "%*s" [set $var] $label]
+		$win insert 1.end $var
+	    }
+	}
+    } else {
+	# Unhighlight the old values
+	foreach regnum $changed_reg_list {
+	    $win tag delete $win.$regnum
+	}
+	set changed_reg_list [eval gdb_changed_register_list $reg_display_list]
+	set display_list $changed_reg_list
+    }
+    foreach regnum $display_list {
+	set lineindex $regmap($regnum)
+	$win delete $lineindex.$margin "$lineindex.0 lineend"
+	foreach format {natural decimal unsigned hex octal raw binary } {
+	    set field (enable)
+	    set var reg_format_$format$field
+	    if {[set $var] == "on"} {
+		set field (format)
+		set var reg_format_$format$field
+		set regval [gdb_fetch_registers [set $var] $regnum]
+		set field (width)
+		set var reg_format_$format$field
+		set regval [format "%*s" [set $var] $regval]
+		$win insert $lineindex.end $regval
+	    }
+	}
+    }
+    # Now, highlight the changed values of the interesting registers
+    if {$which != "all"} {
+	foreach regnum $changed_reg_list {
+	    set lineindex $regmap($regnum)
+	    $win tag add $win.$regnum $lineindex.0 "$lineindex.0 lineend"
+	    eval $win tag configure $win.$regnum $highlight
+	}
+    }
+    set winwidth $margin
+    foreach format {natural decimal unsigned hex octal raw binary} {
+	set field (enable)
+	set var reg_format_$format$field
+	if {[set $var] == "on"} {
+	    set field (width)
+	    set var reg_format_$format$field
+	    set winwidth [expr $winwidth + [set $var]]
+	}
+    }
+    $win configure -width $winwidth
+    $win configure -state disabled
+}
+
+#
+# Local procedure:
+#
+#	update_assembly - Update the assembly window.
+#
+# Description:
+#
+#	This procedure updates the assembly window.
+#
+
+proc update_assembly {linespec} {
+	global asm_pointers
+	global wins cfunc
+	global current_label
+	global win_to_file
+	global file_to_debug_file
+	global current_asm_label
+	global pclist
+	global .asm.label
+
+# Rip the linespec apart
+
+	lassign $linespec debug_file funcname filename line pc
+
+	set win [asm_win_name $cfunc]
+
+# Sometimes there's no source file for this location
+
+	if {$filename == ""} {set filename Blank}
+
+# If we want to switch funcs, we need to unpack the current text widget, and
+# stick in the new one.
+
+	if {$funcname != $cfunc } {
+		set oldwin $win
+		set cfunc $funcname
+
+		set win [asm_win_name $cfunc]
+
+# Create a text widget for this func if necessary
+
+		if {![winfo exists $win]} {
+			create_asm_win $cfunc $pc
+			set asm_pointers($cfunc) 1.1
+			set current_asm_label NIL
+			}
+
+# Pack the text widget, and scroll to the right place
+
+		pack forget $oldwin
+		pack $win -side left -expand yes -fill both \
+			-after .asm.scroll
+		.asm.scroll configure -command "$win yview"
+		set line [pc_to_line $pclist($cfunc) $pc]
+	        ensure_line_visible $win $line
+		update
+		}
+
+# Update the label widget in case the filename or function name has changed
+
+	if {$current_asm_label != "$pc $funcname"} then {
+		set .asm.label "$pc $funcname"
+		set current_asm_label "$pc $funcname"
+		}
+
+# Update the pointer, scrolling the text widget if necessary to keep the
+# pointer in an acceptable part of the screen.
+
+	if {[info exists asm_pointers($cfunc)]} then {
+		$win configure -state normal
+		set pointer_pos $asm_pointers($cfunc)
+		$win configure -state normal
+		$win delete $pointer_pos "$pointer_pos + 2 char"
+		$win insert $pointer_pos "  "
+
+# Map the PC back to a line in the window		
+
+		set line [pc_to_line $pclist($cfunc) $pc]
+
+		if {$line == -1} {
+			echo "Can't find PC $pc"
+			return
+			}
+
+		set pointer_pos [$win index $line.1]
+		set asm_pointers($cfunc) $pointer_pos
+
+		$win delete $pointer_pos "$pointer_pos + 2 char"
+		$win insert $pointer_pos "->"
+	        ensure_line_visible $win $line
+		$win configure -state disabled
+		}
+}
+
+#
+# Local procedure:
+#
+#	update_ptr - Update the listing window.
+#
+# Description:
+#
+#	This routine will update the listing window using the result of
+#	gdb_loc.
+#
+
+proc update_ptr {} {
+	update_listing [gdb_loc]
+	if {[winfo exists .asm]} {
+		update_assembly [gdb_loc]
+	}
+	if {[winfo exists .reg]} {
+		update_registers changed
+	}
+	if {[winfo exists .expr]} {
+		update_exprs
+	}
+	if {[winfo exists .autocmd]} {
+		update_autocmd
+	}
+}
+
+# Make toplevel window disappear
+
+wm withdraw .
+
+proc files_command {} {
+  toplevel .files_window
+
+  wm minsize .files_window 1 1
+  #	wm overrideredirect .files_window true
+  listbox .files_window.list -width 30 -height 20 -setgrid true \
+    -yscrollcommand {.files_window.scroll set} -relief sunken \
+    -borderwidth 2
+  scrollbar .files_window.scroll -orient vertical \
+    -command {.files_window.list yview} -relief sunken
+  button .files_window.close -text Close -command {destroy .files_window}
+  .files_window.list configure -selectmode single
+
+  # Get the file list from GDB, sort it, and insert into the widget.
+  eval .files_window.list insert 0 [lsort [gdb_listfiles]]
+
+  pack .files_window.close -side bottom -fill x -expand no -anchor s
+  pack .files_window.scroll -side right -fill both
+  pack .files_window.list -side left -fill both -expand yes
+  bind .files_window.list <ButtonRelease-1> {
+    set file [%W get [%W curselection]]
+    gdb_cmd "list $file:1,0"
+    update_listing [gdb_loc $file:1]
+    destroy .files_window
+  }
+  # We must execute the listbox binding first, because it
+  # references the widget that will be destroyed by the widget
+  # binding for Button-Release-1.  Otherwise we try to use
+  # .files_window.list after the .files_window is destroyed.
+  bind_widget_after_class .files_window.list
+}
+
+button .files -text Files -command files_command
+
+proc apply_filespec {label default command} {
+    set filename [FSBox $label $default]
+    if {$filename != ""} {
+	if {[catch {gdb_cmd "$command $filename"} retval]} {
+	    tk_dialog .filespec_error "gdb : $label error" \
+	      "Error in command \"$command $filename\"" error \
+	      0 Dismiss
+	    return
+	}
+    update_ptr
+    }
+}
+
+# Run editor.
+proc run_editor {editor file} {
+  # FIXME should use index of line in middle of window, not line at
+  # top.
+  global wins
+  set lineNo [lindex [split [$wins($file) index @0,0] .] 0]
+  exec $editor +$lineNo $file
+}
+
+# Setup command window
+proc build_framework {win {title GDBtk} {label {}}} {
+	global ${win}.label
+
+	toplevel ${win}
+	wm title ${win} $title
+	wm minsize ${win} 1 1
+
+	frame ${win}.menubar
+
+	menubutton ${win}.menubar.file -padx 12 -text File \
+		-menu ${win}.menubar.file.menu -underline 0
+
+	menu ${win}.menubar.file.menu
+	${win}.menubar.file.menu add command -label File... \
+		-command {apply_filespec File a.out file}
+	${win}.menubar.file.menu add command -label Target... \
+		-command { not_implemented_yet "target" }
+	${win}.menubar.file.menu add command -label Edit \
+	        -command {run_editor $editor $cfile}
+	${win}.menubar.file.menu add separator
+	${win}.menubar.file.menu add command -label "Exec File..." \
+		-command {apply_filespec {Exec File} a.out exec-file}
+	${win}.menubar.file.menu add command -label "Symbol File..." \
+		-command {apply_filespec {Symbol File} a.out symbol-file}
+	${win}.menubar.file.menu add command -label "Add Symbol File..." \
+		-command { not_implemented_yet "menu item, add symbol file" }
+	${win}.menubar.file.menu add command -label "Core File..." \
+		-command {apply_filespec {Core File} core core-file}
+
+	${win}.menubar.file.menu add separator
+	${win}.menubar.file.menu add command -label Close \
+		-command "destroy ${win}"
+	${win}.menubar.file.menu add separator
+	${win}.menubar.file.menu add command -label Quit \
+		-command {interactive_cmd quit}
+
+	menubutton ${win}.menubar.commands -padx 12 -text Commands \
+		-menu ${win}.menubar.commands.menu -underline 0
+
+	menu ${win}.menubar.commands.menu
+	${win}.menubar.commands.menu add command -label Run \
+		-command {interactive_cmd run}
+	${win}.menubar.commands.menu add command -label Step \
+		-command {interactive_cmd step}
+	${win}.menubar.commands.menu add command -label Next \
+		-command {interactive_cmd next}
+	${win}.menubar.commands.menu add command -label Continue \
+		-command {interactive_cmd continue}
+	${win}.menubar.commands.menu add separator
+	${win}.menubar.commands.menu add command -label Stepi \
+		-command {interactive_cmd stepi}
+	${win}.menubar.commands.menu add command -label Nexti \
+		-command {interactive_cmd nexti}
+
+	menubutton ${win}.menubar.view -padx 12 -text Options \
+		-menu ${win}.menubar.view.menu -underline 0
+
+	menu ${win}.menubar.view.menu
+	${win}.menubar.view.menu add command -label Hex \
+		-command {echo Hex}
+	${win}.menubar.view.menu add command -label Decimal \
+		-command {echo Decimal}
+	${win}.menubar.view.menu add command -label Octal \
+		-command {echo Octal}
+
+	menubutton ${win}.menubar.window -padx 12 -text Window \
+		-menu ${win}.menubar.window.menu -underline 0
+
+	menu ${win}.menubar.window.menu
+	${win}.menubar.window.menu add command -label Command \
+		-command create_command_window
+	${win}.menubar.window.menu add separator
+	${win}.menubar.window.menu add command -label Source \
+		-command create_source_window
+	${win}.menubar.window.menu add command -label Assembly \
+		-command create_asm_window
+	${win}.menubar.window.menu add separator
+	${win}.menubar.window.menu add command -label Registers \
+		-command create_registers_window
+	${win}.menubar.window.menu add command -label Expressions \
+		-command create_expr_window
+	${win}.menubar.window.menu add command -label "Auto Command" \
+		-command create_autocmd_window
+	${win}.menubar.window.menu add command -label Breakpoints \
+		-command create_breakpoints_window
+
+#	${win}.menubar.window.menu add separator
+#	${win}.menubar.window.menu add command -label Files \
+#		-command { not_implemented_yet "files window" }
+
+	menubutton ${win}.menubar.help -padx 12 -text Help \
+		-menu ${win}.menubar.help.menu -underline 0
+
+	menu ${win}.menubar.help.menu
+	${win}.menubar.help.menu add command -label "with GDBtk" \
+		-command {echo "with GDBtk"}
+	${win}.menubar.help.menu add command -label "with this window" \
+		-command {echo "with this window"}
+	${win}.menubar.help.menu add command -label "Report bug" \
+		-command {exec send-pr}
+
+	pack	${win}.menubar.file \
+		${win}.menubar.view \
+		${win}.menubar.window -side left
+	pack	${win}.menubar.help -side right
+
+	frame ${win}.info
+	text ${win}.text -height 25 -width 80 -relief sunken -borderwidth 2 \
+		-setgrid true -cursor hand2 -yscrollcommand "${win}.scroll set"
+
+	set ${win}.label $label
+	label ${win}.label -textvariable ${win}.label -borderwidth 2 -relief sunken
+
+	scrollbar ${win}.scroll -orient vertical -command "${win}.text yview" \
+		-relief sunken
+
+	bind $win <Key-Alt_R> do_nothing
+	bind $win <Key-Alt_L> do_nothing
+
+	pack ${win}.label -side bottom -fill x -in ${win}.info
+	pack ${win}.scroll -side right -fill y -in ${win}.info
+	pack ${win}.text -side left -expand yes -fill both -in ${win}.info
+
+	pack ${win}.menubar -side top -fill x
+	pack ${win}.info -side top -fill both -expand yes
+}
+
+proc create_source_window {} {
+	global wins
+	global cfile
+
+	if {[winfo exists .src]} {raise .src ; return}
+
+	build_framework .src Source "*No file*"
+
+# First, delete all the old view menu entries
+
+	.src.menubar.view.menu delete 0 last
+
+# Source file selection
+	.src.menubar.view.menu add command -label "Select source file" \
+		-command files_command
+
+# Line numbers enable/disable menu item
+	.src.menubar.view.menu add checkbutton -variable line_numbers \
+		-label "Line numbers" -onvalue 1 -offvalue 0 -command {
+		foreach source [array names wins] {
+			if {$source == "Blank"} continue
+			destroy $wins($source)
+			unset wins($source)
+			}
+		set cfile Blank
+		update_listing [gdb_loc]
+		}
+
+	frame .src.row1
+	frame .src.row2
+
+	button .src.start -width 6 -text Start -command \
+		{interactive_cmd {break main}
+		 interactive_cmd {enable delete $bpnum}
+		 interactive_cmd run }
+	button .src.stop -width 6 -text Stop -fg red -activeforeground red \
+		-state disabled -command gdb_stop
+	button .src.step -width 6 -text Step \
+		-command {interactive_cmd step}
+	button .src.next -width 6 -text Next \
+		-command {interactive_cmd next}
+	button .src.continue -width 6 -text Cont \
+		-command {interactive_cmd continue}
+	button .src.finish -width 6 -text Finish \
+		-command {interactive_cmd finish}
+	button .src.up -width 6 -text Up \
+		-command {interactive_cmd up}
+	button .src.down -width 6 -text Down \
+		-command {interactive_cmd down}
+	button .src.bottom -width 6 -text Bottom \
+		-command {interactive_cmd {frame 0}}
+
+	pack .src.start .src.step .src.continue .src.up .src.bottom \
+		-side left -padx 3 -pady 5 -in .src.row1
+	pack .src.stop .src.next .src.finish .src.down -side left -padx 3 \
+		-pady 5 -in .src.row2
+
+	pack .src.row2 .src.row1 -side bottom -anchor w -before .src.info
+
+	$wins($cfile) insert 0.0 "  This page intentionally left blank."
+	$wins($cfile) configure -width 88 -state disabled \
+		-yscrollcommand ".src.scroll set"
+}
+
+proc update_autocmd {} {
+	global .autocmd.label
+	global accumulate_output
+
+	catch {gdb_cmd "${.autocmd.label}"} result
+	if {!$accumulate_output} { .autocmd.text delete 0.0 end }
+	.autocmd.text insert end $result
+	.autocmd.text see end
+}
+
+proc create_autocmd_window {} {
+  global .autocmd.label
+
+  if {[winfo exists .autocmd]} {raise .autocmd ; return}
+
+  build_framework .autocmd "Auto Command" ""
+
+  # First, delete all the old view menu entries
+
+  .autocmd.menubar.view.menu delete 0 last
+
+  # Accumulate output option
+
+  .autocmd.menubar.view.menu add checkbutton \
+    -variable accumulate_output \
+    -label "Accumulate output" -onvalue 1 -offvalue 0
+
+  # Now, create entry widget with label
+
+  frame .autocmd.entryframe
+
+  entry .autocmd.entry -borderwidth 2 -relief sunken
+  bind .autocmd.entry <Key-Return> {
+    set .autocmd.label [.autocmd.entry get]
+    .autocmd.entry delete 0 end
+  }
+
+  label .autocmd.entrylab -text "Command: "
+
+  pack .autocmd.entrylab -in .autocmd.entryframe -side left
+  pack .autocmd.entry -in .autocmd.entryframe -side left -fill x -expand yes
+
+  pack .autocmd.entryframe -side bottom -fill x -before .autocmd.info
+}
+
+# Return the longest common prefix in SLIST.  Can be empty string.
+
+proc find_lcp slist {
+# Handle trivial cases where list is empty or length 1
+	if {[llength $slist] <= 1} {return [lindex $slist 0]}
+
+	set prefix [lindex $slist 0]
+	set prefixlast [expr [string length $prefix] - 1]
+
+	foreach str [lrange $slist 1 end] {
+		set test_str [string range $str 0 $prefixlast]
+		while {[string compare $test_str $prefix] != 0} {
+			decr prefixlast
+			set prefix [string range $prefix 0 $prefixlast]
+			set test_str [string range $str 0 $prefixlast]
+		}
+		if {$prefixlast < 0} break
+	}
+	return $prefix
+}
+
+# Look through COMPLETIONS to generate the suffix needed to do command
+# completion on CMD.
+
+proc find_completion {cmd completions} {
+# Get longest common prefix
+	set lcp [find_lcp $completions]
+	set cmd_len [string length $cmd]
+# Return suffix beyond end of cmd
+	return [string range $lcp $cmd_len end]
+}
+
+proc create_command_window {} {
+	global command_line
+	global saw_tab
+	global gdb_prompt
+
+	set saw_tab 0
+	if {[winfo exists .cmd]} {raise .cmd ; return}
+
+	build_framework .cmd Command "* Command Buffer *"
+
+        # Put focus on command area.
+        focus .cmd.text
+
+	set command_line {}
+
+	gdb_cmd {set language c}
+	gdb_cmd {set height 0}
+	gdb_cmd {set width 0}
+
+	bind .cmd.text <Control-c> gdb_stop
+
+        # Tk uses the Motifism that Delete means delete forward.  I
+	# hate this, and I'm not gonna take it any more.
+        set bsBinding [bind Text <BackSpace>]
+        bind .cmd.text <Delete> "delete_char %W ; $bsBinding; break"
+	bind .cmd.text <BackSpace> {
+	  if {([%W cget -state] == "disabled")} { break }
+	  delete_char %W
+	}
+	bind .cmd.text <Control-u> {
+	  if {([%W cget -state] == "disabled")} { break }
+	  delete_line %W
+	  break
+	}
+	bind .cmd.text <Any-Key> {
+	  if {([%W cget -state] == "disabled")} { break }
+	  set saw_tab 0
+	  %W insert end %A
+	  %W see end
+	  append command_line %A
+	  break
+	}
+	bind .cmd.text <Key-Return> {
+	  if {([%W cget -state] == "disabled")} { break }
+	  set saw_tab 0
+	  %W insert end \n
+	  interactive_cmd $command_line
+
+	  # %W see end
+	  # catch "gdb_cmd [list $command_line]" result
+	  # %W insert end $result
+	  set command_line {}
+	  # update_ptr
+	  %W insert end "$gdb_prompt"
+	  %W see end
+	  break
+	}
+	bind .cmd.text <Button-2> {
+	  %W insert end [selection get]
+	  %W see end
+	  append command_line [selection get]
+	  break
+	}
+        bind .cmd.text <B2-Motion> break
+        bind .cmd.text <ButtonRelease-2> break
+	bind .cmd.text <Key-Tab> {
+	  if {([%W cget -state] == "disabled")} { break }
+	  set choices [gdb_cmd "complete $command_line"]
+	  set choices [string trimright $choices \n]
+	  set choices [split $choices \n]
+
+	  # Just do completion if this is the first tab
+	  if {!$saw_tab} {
+	    set saw_tab 1
+	    set completion [find_completion $command_line $choices]
+	    append command_line $completion
+	    # Here is where the completion is actually done.  If there
+	    # is one match, complete the command and print a space.
+	    # If two or more matches, complete the command and beep.
+	    # If no match, just beep.
+	    switch [llength $choices] {
+	      0	{}
+	      1	{
+		%W insert end "$completion "
+		append command_line " "
+		return
+	      }
+
+	      default {
+		%W insert end $completion
+	      }
+	    }
+	    bell
+	    %W see end
+	  } else {
+	    # User hit another consecutive tab.  List the choices.
+	    # Note that at this point, choices may contain commands
+	    # with spaces.  We have to lop off everything before (and
+	    # including) the last space so that the completion list
+	    # only shows the possibilities for the last token.
+	    set choices [lsort $choices]
+	    if {[regexp ".* " $command_line prefix]} {
+	      regsub -all $prefix $choices {} choices
+	    }
+	    %W insert end "\n[join $choices { }]\n$gdb_prompt$command_line"
+	    %W see end
+	  }
+	  break
+	}
+}
+
+# Trim one character off the command line.  The argument is ignored.
+
+proc delete_char {win} {
+  global command_line
+  set tmp [expr [string length $command_line] - 2]
+  set command_line [string range $command_line 0 $tmp]
+}
+
+# FIXME: This should actually check that the first characters of the current
+# line  match the gdb prompt, since the user can move the insertion point
+# anywhere.  It should also check that the insertion point is in the last
+# line of the text widget.
+
+proc delete_line {win} {
+    global command_line
+    global gdb_prompt
+
+    set tmp [string length $gdb_prompt]
+    $win delete "insert linestart + $tmp chars" "insert lineend"
+    $win see insert
+    set command_line {}
+}
+
+#
+# fileselect.tcl --
+# simple file selector.
+#
+# Mario Jorge Silva			          msilva@cs.Berkeley.EDU
+# University of California Berkeley                 Ph:    +1(510)642-8248
+# Computer Science Division, 571 Evans Hall         Fax:   +1(510)642-5775
+# Berkeley CA 94720                                 
+# 
+#
+# Copyright 1993 Regents of the University of California
+# Permission to use, copy, modify, and distribute this
+# software and its documentation for any purpose and without
+# fee is hereby granted, provided that this copyright
+# notice appears in all copies.  The University of California
+# makes no representations about the suitability of this
+# software for any purpose.  It is provided "as is" without
+# express or implied warranty.
+#
+
+
+# names starting with "fileselect" are reserved by this module
+# no other names used.
+# Hack - FSBox is defined instead of fileselect for backwards compatibility
+
+
+# this is the proc that creates the file selector box
+# purpose - comment string
+# defaultName - initial value for name
+# cmd - command to eval upon OK
+# errorHandler - command to eval upon Cancel
+# If neither cmd or errorHandler are specified, the return value
+# of the FSBox procedure is the selected file name.
+
+proc FSBox {{purpose "Select file:"} {defaultName ""} {cmd ""} {errorHandler 
+""}} {
+    global fileselect
+    set w .fileSelect
+    if {[Exwin_Toplevel $w "Select File" FileSelect]} {
+	# path independent names for the widgets
+	
+	set fileselect(list) $w.file.sframe.list
+	set fileselect(scroll) $w.file.sframe.scroll
+	set fileselect(direntry) $w.file.f1.direntry
+	set fileselect(entry) $w.file.f2.entry
+	set fileselect(ok) $w.but.ok
+	set fileselect(cancel) $w.but.cancel
+	set fileselect(msg) $w.label
+	
+	set fileselect(result) ""	;# value to return if no callback procedures
+
+	# widgets
+	Widget_Label $w label {top fillx pady 10 padx 20} -anchor w -width 24
+	Widget_Frame $w file Dialog {left expand fill} -bd 10
+	
+	Widget_Frame $w.file f1 Exmh {top fillx}
+	Widget_Label $w.file.f1 label {left} -text "Dir"
+	Widget_Entry $w.file.f1 direntry {right fillx expand}  -width 30
+	
+	Widget_Frame $w.file sframe
+
+	scrollbar $w.file.sframe.yscroll -relief sunken \
+		-command [list $w.file.sframe.list yview]
+	listbox $w.file.sframe.list -relief sunken \
+		-yscroll [list $w.file.sframe.yscroll set] -setgrid 1
+	pack append $w.file.sframe \
+		$w.file.sframe.yscroll {right filly} \
+		$w.file.sframe.list {left expand fill} 
+	
+	Widget_Frame $w.file f2 Exmh {top fillx}
+	Widget_Label $w.file.f2 label {left} -text Name
+	Widget_Entry $w.file.f2 entry {right fillx expand}
+	
+	# buttons
+	$w.but.quit configure -text Cancel \
+		-command [list fileselect.cancel.cmd $w]
+	
+	Widget_AddBut $w.but ok OK \
+		[list fileselect.ok.cmd $w $cmd $errorHandler] {left padx 1}
+	
+	Widget_AddBut $w.but list List \
+		[list fileselect.list.cmd $w] {left padx 1}    
+	Widget_CheckBut $w.but listall "List all" fileselect(pattern)
+	$w.but.listall configure -onvalue "{*,.*}" -offvalue "*" \
+	    -command {fileselect.list.cmd $fileselect(direntry)}
+	$w.but.listall deselect
+
+	# Set up bindings for the browser.
+	foreach ww [list $w $fileselect(entry)] {
+	    bind $ww <Return> [list $fileselect(ok) invoke]
+	    bind $ww <Control-c> [list $fileselect(cancel) invoke]
+	}
+	bind $fileselect(direntry) <Return> [list fileselect.list.cmd %W]
+	bind $fileselect(direntry) <Tab> [list fileselect.tab.dircmd]
+	bind $fileselect(entry) <Tab> [list fileselect.tab.filecmd]
+
+        $fileselect(list) configure -selectmode single
+
+	bind $fileselect(list) <Button-1> {
+	    # puts stderr "button 1 release"
+	    $fileselect(entry) delete 0 end
+	    $fileselect(entry) insert 0 [%W get [%W nearest %y]]
+	}
+    
+	bind $fileselect(list) <Key> {
+	    $fileselect(entry) delete 0 end
+	    $fileselect(entry) insert 0 [%W get [%W nearest %y]]
+	}
+    
+	bind $fileselect(list) <Double-ButtonPress-1> {
+	    # puts stderr "double button 1"
+	    $fileselect(entry) delete 0 end
+	    $fileselect(entry) insert 0 [%W get [%W nearest %y]]
+	    $fileselect(ok) invoke
+	}
+    
+	bind $fileselect(list) <Return> {
+	    $fileselect(entry) delete 0 end
+	    $fileselect(entry) insert 0 [%W get [%W nearest %y]]
+	    $fileselect(ok) invoke
+	}
+    }
+    set fileselect(text) $purpose
+    $fileselect(msg) configure -text $purpose
+    $fileselect(entry) delete 0 end
+    $fileselect(entry) insert 0 [file tail $defaultName]
+
+    if {[info exists fileselect(lastDir)] && ![string length $defaultName]} {
+	set dir $fileselect(lastDir)
+    } else {
+	set dir [file dirname $defaultName]
+    }
+    set fileselect(pwd) [pwd]
+    fileselect.cd $dir
+    $fileselect(direntry) delete 0 end
+    $fileselect(direntry) insert 0 [pwd]/
+
+    $fileselect(list) delete 0 end
+    $fileselect(list) insert 0 "Big directory:"
+    $fileselect(list) insert 1 $dir
+    $fileselect(list) insert 2 "Press Return for Listing"
+
+    fileselect.list.cmd $fileselect(direntry) startup
+
+    # set kbd focus to entry widget
+
+#    Exwin_ToplevelFocus $w $fileselect(entry)
+
+    # Wait for button hits if no callbacks are defined
+
+    if {"$cmd" == "" && "$errorHandler" == ""} {
+	# wait for the box to be destroyed
+	update idletask
+	grab $w
+	tkwait variable fileselect(result)
+	grab release $w
+
+	set path $fileselect(result)
+	set fileselect(lastDir) [pwd]
+	fileselect.cd $fileselect(pwd)
+	return [string trimright [string trim $path] /]
+    }
+    fileselect.cd $fileselect(pwd)
+    return ""
+}
+
+proc fileselect.cd { dir } {
+    global fileselect
+    if {[catch {cd $dir} err]} {
+	fileselect.yck $dir
+	cd
+    }
+}
+# auxiliary button procedures
+
+proc fileselect.yck { {tag {}} } {
+    global fileselect
+    $fileselect(msg) configure -text "Yck! $tag"
+}
+
+proc fileselect.ok {} {
+    global fileselect
+    $fileselect(msg) configure -text $fileselect(text)
+}
+
+proc fileselect.cancel.cmd {w} {
+    global fileselect
+    set fileselect(result) {}
+    destroy $w
+}
+
+proc fileselect.list.cmd {w {state normal}} {
+    global fileselect
+    set seldir [$fileselect(direntry) get]
+    if {[catch {glob $seldir} dir]} {
+	fileselect.yck "glob failed"
+	return
+    }
+    if {[llength $dir] > 1} {
+	set dir [file dirname $seldir]
+	set pat [file tail $seldir]
+    } else {
+	set pat $fileselect(pattern)
+    }
+    fileselect.ok
+    update idletasks
+    if {[file isdirectory $dir]} {
+	fileselect.getfiles $dir $pat $state
+	focus $fileselect(entry)
+    } else {
+	fileselect.yck "not a dir"
+    }
+}
+
+proc fileselect.ok.cmd {w cmd errorHandler} {
+    global fileselect
+    set selname [$fileselect(entry) get]
+    set seldir [$fileselect(direntry) get]
+
+    if {[string match /* $selname]} {
+	set selected $selname
+    } else {
+	if {[string match ~* $selname]} {
+	    set selected $selname
+	} else {
+	    set selected $seldir/$selname
+	}
+    }
+
+    # some nasty file names may cause "file isdirectory" to return an error
+    if {[catch {file isdirectory $selected} isdir]} {
+	fileselect.yck "isdirectory failed"
+	return
+    }
+    if {[catch {glob $selected} globlist]} {
+	if {![file isdirectory [file dirname $selected]]} {
+	    fileselect.yck "bad pathname"
+	    return
+	}
+	set globlist $selected
+    }
+    fileselect.ok
+    update idletasks
+
+    if {[llength $globlist] > 1} {
+	set dir [file dirname $selected]
+	set pat [file tail $selected]
+	fileselect.getfiles $dir $pat
+	return
+    } else {
+	set selected $globlist
+    }
+    if {[file isdirectory $selected]} {
+	fileselect.getfiles $selected $fileselect(pattern)
+	$fileselect(entry) delete 0 end
+	return
+    }
+
+    if {$cmd != {}} {
+	$cmd $selected
+    } else {
+	set fileselect(result) $selected
+    }
+    destroy $w
+}
+
+proc fileselect.getfiles { dir {pat *} {state normal} } {
+    global fileselect
+    $fileselect(msg) configure -text Listing...
+    update idletasks
+
+    set currentDir [pwd]
+    fileselect.cd $dir
+    if {[catch {set files [lsort [glob -nocomplain $pat]]} err]} {
+	$fileselect(msg) configure -text $err
+	$fileselect(list) delete 0 end
+	update idletasks
+	return
+    }
+    switch -- $state {
+	normal {
+	    # Normal case - show current directory
+	    $fileselect(direntry) delete 0 end
+	    $fileselect(direntry) insert 0 [pwd]/
+	}
+	opt {
+	    # Directory already OK (tab related)
+	}
+	newdir {
+	    # Changing directory (tab related)
+	    fileselect.cd $currentDir
+	}
+	startup {
+	    # Avoid listing huge directories upon startup.
+	    $fileselect(direntry) delete 0 end
+	    $fileselect(direntry) insert 0 [pwd]/
+	    if {[llength $files] > 32} {
+		fileselect.ok
+		return
+	    }
+	}
+    }
+
+    # build a reordered list of the files: directories are displayed first
+    # and marked with a trailing "/"
+    if {[string compare $dir /]} {
+	fileselect.putfiles $files [expr {($pat == "*") ? 1 : 0}]
+    } else {
+	fileselect.putfiles $files
+    }
+    fileselect.ok
+}
+
+proc fileselect.putfiles {files {dotdot 0} } {
+    global fileselect
+
+    $fileselect(list) delete 0 end
+    if {$dotdot} {
+	$fileselect(list) insert end "../"
+    }
+    foreach i $files {
+        if {[file isdirectory $i]} {
+	    $fileselect(list) insert end $i/
+	} else {
+	    $fileselect(list) insert end $i
+	}
+    }
+}
+
+proc FileExistsDialog { name } {
+    set w .fileExists
+    global fileExists
+    set fileExists(ok) 0
+    {
+	message $w.msg -aspect 1000
+	pack $w.msg -side top -fill both -padx 20 -pady 20
+	$w.but.quit config -text Cancel -command {FileExistsCancel}
+	button $w.but.ok -text OK -command {FileExistsOK}
+	pack $w.but.ok -side left
+	bind $w.msg <Return> {FileExistsOK}
+    }
+    $w.msg config -text "Warning: file exists
+$name
+OK to overwrite it?"
+
+    set fileExists(focus) [focus]
+    focus $w.msg
+    grab $w
+    tkwait variable fileExists(ok)
+    grab release $w
+    destroy $w
+    return $fileExists(ok)
+}
+
+proc FileExistsCancel {} {
+    global fileExists
+    set fileExists(ok) 0
+}
+
+proc FileExistsOK {} {
+    global fileExists
+    set fileExists(ok) 1
+}
+
+proc fileselect.getfiledir { dir {basedir [pwd]} } {
+    global fileselect
+
+    set path [$fileselect(direntry) get]
+    set returnList {}
+
+    if {$dir != 0} {
+	if {[string index $path 0] == "~"} {
+	    set path $path/
+	}
+    } else {
+	set path [$fileselect(entry) get]
+    }
+    if {[catch {set listFile [glob -nocomplain $path*]}]} {
+	return  $returnList
+    }
+    foreach el $listFile {
+	if {$dir != 0} {
+	    if {[file isdirectory $el]} {
+		lappend returnList [file tail $el]
+	    }
+	} elseif {![file isdirectory $el]} {
+	    lappend returnList [file tail $el]
+	}	    
+    }
+    
+    return $returnList
+}
+
+proc fileselect.gethead { list } {
+    set returnHead ""
+
+    for {set i 0} {[string length [lindex $list 0]] > $i}\
+	{incr i; set returnHead $returnHead$thisChar} {
+	    set thisChar [string index [lindex $list 0] $i]
+	    foreach el $list {
+		if {[string length $el] < $i} {
+		    return $returnHead
+		}
+		if {$thisChar != [string index $el $i]} {
+		    return $returnHead
+		}
+	    }
+	}
+    return $returnHead
+}
+
+# FIXME this function is a crock.  Can write tilde expanding function
+# in terms of glob and quote_glob; do so.
+proc fileselect.expand.tilde { } {
+    global fileselect
+
+    set entry [$fileselect(direntry) get]
+    set dir [string range $entry 1 [string length $entry]]
+
+    if {$dir == ""} {
+	return
+    }
+
+    set listmatch {}
+
+    ## look in /etc/passwd
+    if {[file exists /etc/passwd]} {
+	if {[catch {set users [exec cat /etc/passwd | sed s/:.*//]} err]} {
+	    puts "Error\#1 $err"
+	    return
+	}
+	set list [split $users "\n"]
+    }
+    if {[lsearch -exact $list "+"] != -1} {
+	if {[catch {set users [exec ypcat passwd | sed s/:.*//]} err]} {
+	    puts "Error\#2 $err"
+	    return
+	}
+	set list [concat $list [split $users "\n"]]
+    }
+    $fileselect(list) delete 0 end
+    foreach el $list {
+	if {[string match $dir* $el]} {
+	    lappend listmatch $el
+	    $fileselect(list) insert end $el
+	}
+    }
+    set addings [fileselect.gethead $listmatch]
+    if {$addings == ""} {
+	return
+    }
+    $fileselect(direntry) delete 0 end
+    if {[llength $listmatch] == 1} {
+	$fileselect(direntry) insert 0 [file dirname ~$addings/]
+	fileselect.getfiles [$fileselect(direntry) get]
+    } else {
+	$fileselect(direntry) insert 0 ~$addings
+    }
+}
+
+proc fileselect.tab.dircmd { } {
+    global fileselect
+
+    set dir [$fileselect(direntry) get]
+    if {$dir == ""} {
+	$fileselect(direntry) delete 0 end
+	    $fileselect(direntry) insert 0 [pwd]
+	if {[string compare [pwd] "/"]} {
+	    $fileselect(direntry) insert end /
+	}
+	return
+    }
+    if {[catch {set tmp [file isdirectory [file dirname $dir]]}]} {
+	if {[string index $dir 0] == "~"} {
+	    fileselect.expand.tilde
+	}
+	return
+    }
+    if {!$tmp} {
+	return
+    }
+    set dirFile [fileselect.getfiledir 1 $dir]
+    if {![llength $dirFile]} {
+	return
+    }
+    if {[llength $dirFile] == 1} {
+	$fileselect(direntry) delete 0 end
+	$fileselect(direntry) insert 0 [file dirname $dir]
+	if {[string compare [file dirname $dir] /]} {
+	    $fileselect(direntry) insert end /[lindex $dirFile 0]/
+	} else {
+	    $fileselect(direntry) insert end [lindex $dirFile 0]/
+	}
+	fileselect.getfiles [$fileselect(direntry) get] \
+	    "[file tail [$fileselect(direntry) get]]$fileselect(pattern)" opt
+	return
+    }
+    set headFile [fileselect.gethead $dirFile]
+    $fileselect(direntry) delete 0 end
+    $fileselect(direntry) insert 0 [file dirname $dir]
+    if {[string compare [file dirname $dir] /]} {
+	$fileselect(direntry) insert end /$headFile
+    } else {
+	$fileselect(direntry) insert end $headFile
+    }
+    if {$headFile == "" && [file isdirectory $dir]} {
+	fileselect.getfiles $dir\
+	    "[file tail [$fileselect(direntry) get]]$fileselect(pattern)" opt
+    } else {
+	fileselect.getfiles [file dirname $dir]\
+	    "[file tail [$fileselect(direntry) get]]*" newdir
+    }
+}
+
+proc fileselect.tab.filecmd { } {
+    global fileselect
+
+    set dir [$fileselect(direntry) get]
+    if {$dir == ""} {
+	set dir [pwd]
+    }
+    if {![file isdirectory $dir]} {
+	error "dir $dir doesn't exist"
+    }
+    set listFile [fileselect.getfiledir 0 $dir]
+    puts $listFile
+    if {![llength $listFile]} {
+	return
+    }
+    if {[llength $listFile] == 1} {
+	$fileselect(entry) delete 0 end
+	$fileselect(entry) insert 0 [lindex $listFile 0]
+	return
+    }
+    set headFile [fileselect.gethead $listFile]
+    $fileselect(entry) delete 0 end
+    $fileselect(entry) insert 0 $headFile
+    fileselect.getfiles $dir "[$fileselect(entry) get]$fileselect(pattern)" opt
+}
+
+proc Exwin_Toplevel { path name {class Dialog} {dismiss yes}} {
+    global exwin
+    if {[catch {wm state $path} state]} {
+	set t [Widget_Toplevel $path $name $class]
+	if {![info exists exwin(toplevels)]} {
+	    set exwin(toplevels) [option get . exwinPaths {}]
+	}
+	set ix [lsearch $exwin(toplevels) $t]
+	if {$ix < 0} {
+	    lappend exwin(toplevels) $t
+	}
+	if {$dismiss == "yes"} {
+	    set f [Widget_Frame $t but Menubar {top fill}]
+	    Widget_AddBut $f quit "Dismiss" [list Exwin_Dismiss $path]
+	}
+	return 1
+    } else {
+	if {$state != "normal"} {
+	    catch {
+		wm geometry $path $exwin(geometry,$path)
+#		Exmh_Debug Exwin_Toplevel $path $exwin(geometry,$path)
+	    }
+	    wm deiconify $path
+	} else {
+	    catch {raise $path}
+	}
+	return 0
+    }
+}
+
+proc Exwin_Dismiss { path {geo ok} } {
+    global exwin
+    case $geo {
+	"ok" {
+	    set exwin(geometry,$path) [wm geometry $path]
+	}
+	"nosize" {
+	    set exwin(geometry,$path) [string trimleft [wm geometry $path] 0123456789x]
+	}
+	default {
+	    catch {unset exwin(geometry,$path)}
+	}
+    }
+    wm withdraw $path
+}
+
+proc Widget_Toplevel { path name {class Dialog} {x {}} {y {}} } {
+    set self [toplevel $path -class $class]
+    set usergeo [option get $path position Position]
+    if {$usergeo != {}} {
+	if {[catch {wm geometry $self $usergeo} err]} {
+#	    Exmh_Debug Widget_Toplevel $self $usergeo => $err
+	}
+    } else {
+	if {($x != {}) && ($y != {})} {
+#	    Exmh_Debug Event position $self +$x+$y
+	    wm geometry $self +$x+$y
+	}
+    }
+    wm title $self $name
+    wm group $self .
+    return $self
+}
+
+proc Widget_Frame {par child {class GDB} {where {top expand fill}} args } {
+    if {$par == "."} {
+	set self .$child
+    } else {
+	set self $par.$child
+    }
+    eval {frame $self -class $class} $args
+    pack append $par $self $where
+    return $self
+}
+
+proc Widget_AddBut {par but txt cmd {where {right padx 1}} } {
+    # Create a Packed button.  Return the button pathname
+    set cmd2 [list button $par.$but -text $txt -command $cmd]
+    if {[catch $cmd2 t]} {
+	puts stderr "Widget_AddBut (warning) $t"
+	eval $cmd2 {-font fixed}
+    }
+    pack append $par $par.$but $where
+    return $par.$but
+}
+
+proc Widget_CheckBut {par but txt var {where {right padx 1}} } {
+    # Create a check button.  Return the button pathname
+    set cmd [list checkbutton $par.$but -text $txt -variable $var]
+    if {[catch $cmd t]} {
+	puts stderr "Widget_CheckBut (warning) $t"
+	eval $cmd {-font fixed}
+    }
+    pack append $par $par.$but $where
+    return $par.$but
+}
+
+proc Widget_Label { frame {name label} {where {left fill}} args} {
+    set cmd [list label $frame.$name ]
+    if {[catch [concat $cmd $args] t]} {
+	puts stderr "Widget_Label (warning) $t"
+	eval $cmd $args {-font fixed}
+    }
+    pack append $frame $frame.$name $where
+    return $frame.$name
+}
+
+proc Widget_Entry { frame {name entry} {where {left fill}} args} {
+    set cmd [list entry $frame.$name ]
+    if {[catch [concat $cmd $args] t]} {
+	puts stderr "Widget_Entry (warning) $t"
+	eval $cmd $args {-font fixed}
+    }
+    pack append $frame $frame.$name $where
+    return $frame.$name
+}
+
+# End of fileselect.tcl.
+
+#
+# Create a copyright window and center it on the screen.  Arrange for
+# it to disappear when the user clicks it, or after a suitable period
+# of time.
+#
+proc create_copyright_window {} {
+  toplevel .c
+  message .c.m -text [gdb_cmd {show version}] -aspect 500 -relief raised
+  pack .c.m
+
+  bind .c.m <1> {destroy .c}
+  bind .c <Leave> {destroy .c}
+  # "suitable period" currently means "30 seconds".
+  after 30000 {
+    if {[winfo exists .c]} then {
+      destroy .c
+    }
+  }
+
+  wm transient .c .
+  center_window .c
+}
+
+# Begin support primarily for debugging the tcl/tk portion of gdbtk.  You can
+# start gdbtk, and then issue the command "tk tclsh" and a window will pop up
+# giving you direct access to the tcl interpreter.  With this, it is very easy
+# to examine the values of global variables, directly invoke routines that are
+# part of the gdbtk interface, replace existing proc's with new ones, etc.
+# This code was inspired from example 11-3 in Brent Welch's "Practical
+# Programming in Tcl and Tk"
+
+set tcl_prompt "tcl> "
+
+# Get the current command that user has typed, from cmdstart to end of text
+# widget.  Evaluate it, insert result back into text widget, issue a new
+# prompt, update text widget and update command start mark.
+
+proc evaluate_tcl_command { twidget } {
+    global tcl_prompt
+
+    set command [$twidget get cmdstart end]
+    if [info complete $command] {
+	set err [catch {uplevel #0 $command} result]
+	$twidget insert insert \n$result\n
+	$twidget insert insert $tcl_prompt
+	$twidget see insert
+	$twidget mark set cmdstart insert
+	return
+    }
+}
+
+# Create the evaluation window and set up the keybindings to evaluate the
+# last single line entered by the user.  FIXME: allow multiple lines?
+
+proc tclsh {} {
+    global tcl_prompt
+
+    # If another evaluation window already exists, just bring it to the front.
+    if {[winfo exists .eval]} {raise .eval ; return}
+
+    # Create top level frame with scrollbar and text widget.
+    toplevel .eval
+    wm title .eval "Tcl Evaluation"
+    wm iconname .eval "Tcl"
+    text .eval.text -width 80 -height 20 -setgrid true -cursor hand2 \
+	    -yscrollcommand {.eval.scroll set}
+    scrollbar .eval.scroll -command {.eval.text yview}
+    pack .eval.scroll -side right -fill y
+    pack .eval.text -side left -fill both -expand true
+
+    # Insert the tcl_prompt and initialize the cmdstart mark
+    .eval.text insert insert $tcl_prompt
+    .eval.text mark set cmdstart insert
+    .eval.text mark gravity cmdstart left
+
+    # Make this window the current one for input.
+    focus .eval.text
+
+    # Keybindings that limit input and evaluate things
+    bind .eval.text <Return> { evaluate_tcl_command .eval.text ; break }
+    bind .eval.text <BackSpace> {
+	if [%W compare insert > cmdstart] {
+	    %W delete {insert - 1 char} insert
+	} else {
+	    bell
+	}
+	break
+    }
+    bind .eval.text <Any-Key> {
+	if [%W compare insert < cmdstart] {
+	    %W mark set insert end
+	}
+    }
+    bind .eval.text <Control-u> {
+	%W delete cmdstart "insert lineend"
+	%W see insert
+    }
+    bindtags .eval.text {.eval.text Text all}
+}
+
+# This proc is executed just prior to falling into the Tk main event loop.
+proc gdbtk_tcl_preloop {} {
+    global gdb_prompt
+    .cmd.text insert end "$gdb_prompt"
+    .cmd.text see end
+    update
+}
+
+# FIXME need to handle mono here.  In Tk4 that is more complicated.
+set highlight "-background red2 -borderwidth 2 -relief sunken"
+
+# Setup the initial windows
+create_source_window
+create_command_window
+
+# Make this last so user actually sees it.
+create_copyright_window
+# Refresh.
+update
+
+if {[file exists ~/.gdbtkinit]} {
+  source ~/.gdbtkinit
+}