Subversion Repositories openfire2

# Target selection dialog for Insight.

# Copyright 1997, 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.

#

# This program is free software; you can redistribute it and/or modify it

# under the terms of the GNU General Public License (GPL) 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.

# ----------------------------------------------------------------------

# Implements GDB TargetSelection dialog

# ----------------------------------------------------------------------

# ------------------------------------------------------------------

#  CONSTRUCTOR - create new target selection window

# ------------------------------------------------------------------

body TargetSelection::constructor {args} {

  eval itk_initialize $args

  set top [winfo toplevel $itk_interior]

  _init

  build_win

}

body TargetSelection::getname {target name} {

  # Init target database if we haven't already done so

  init_target_db

  if {[info exists gdb_target($target,$name)]} {

    return $gdb_target($target,$name)

  } else {

    return ""

  }

}

body TargetSelection::init_target_db {} {

  # check to see if we already initialized this database

  if {$db_inited} {

    return

  }

  set db_inited 1

  # Target Database

  # Set the following members:

  # TARGET,pretty-name: Name to display to user

  # TARGET,debaud: Default baudrate

  # TARGET,baud-rates: Permissible baudrates

  # TARGET,cmd: Abstracted command to run for this target (tcpX and com1 are

  #          replaced with the real port and host/port in set_target)

  # TARGET,runlist: List of preferences for the target: {attach download run cont}

  # TARGET,after_attaching: a command to run after attaching to the target

  # Simulator

  set gdb_target(sim,pretty-name) "Simulator"

  set gdb_target(sim,defbaud) ""

  set gdb_target(sim,baud-rates) {}

  set gdb_target(sim,cmd) "sim"

  set gdb_target(sim,runlist) {1 1 1 0}

  set gdb_target(sim,options) ""

  set gdb_target(sim,after_attaching) {}

  # Remote serial port

  set gdb_target(serial,pretty-name) "Remote/Serial"

  set gdb_target(serial,defbaud) "115200"

  set gdb_target(serial,baud-rates) {9600 19200 38400 57600 115200}

  set gdb_target(serial,cmd) "remote com1"

  set gdb_target(serial,runlist) {1 1 0 1}

  set gdb_target(serial,after_attaching) {}

 # Remote TCP

 set gdb_target(remote,pretty-name) "Remote/TCP"

 set gdb_target(remote,defbaud) "TCP"

 set gdb_target(remote,baud-rates) {}

 set gdb_target(remote,cmd) "remote tcpX"

 set gdb_target(remote,runlist) {1 1 0 1}

 set gdb_target(remote,after_attaching) {}

}

body TargetSelection::default_port {} {

  global tcl_platform

  switch -regexp $tcl_platform(os) {

    Windows { set port /dev/com1 }

    Linux   { set port /dev/ttyS0 }

    SunOS   { set port /dev/ttya }

    AIX     { set port /dev/foo1 }

    ULTRIX  { set port /dev/foo1 }

    IRIX    { set port /dev/foo1 }

    OSF1    { set port /dev/foo1 }

    NetBSD  { set port /dev/foo1 }

    HP-UX   {

      # Special case...

      switch -regexp $tcl_platform(osVersion) {

        A.09 { set port /dev/tty00 }

        B.10 -

        B.11 { set port /dev/tty0p0 }

      }

    }

    default { set port /dev/ttya }

  }

  return $port

}

body TargetSelection::_init_prefs {} {

  if {$prefs_inited} {

    return

  }

  set prefs_inited 1

  # these are not target-specific

  pref define gdb/load/main 1

  pref define gdb/load/exit 1

  pref define gdb/load/check 0

  # these are target-specific

  # set up the defaults

  pref define gdb/load/default-verbose 0

  pref define gdb/load/default-port [default_port]

  pref define gdb/load/default-hostname "localhost"

  pref define gdb/load/default-after_attaching {}

}

body TargetSelection::_init_target {} {

  global gdb_target_name

# Xilinx changes - Force this to a remote target

  set gdb_target_name sim

# end Xilinx changes

  #set target_list [get_target_list]

  set target_list { sim serial remote }

  set target $gdb_target_name

  # target = CANCEL should never come into here.  If the target was

  # returned as CANCEL, it should be fixed by the caller...  But it

  # should not be harmful if it gets in here.

  if {$target == "" || [string compare $target CANCEL] == 0} {

    set target default

  }

  set defbaud $gdb_target($target,defbaud)

  pref define gdb/load/$target-baud $defbaud

  pref define gdb/load/$target-port [pref get gdb/load/default-port]

  pref define gdb/load/$target-verbose [pref get gdb/load/default-verbose]

  pref define gdb/load/$target-portname 1234

  pref define gdb/load/$target-hostname [pref get gdb/load/default-hostname]

  set err [catch {pref get gdb/load/$target-runlist} run_list]

  if {$err} {

    set run_list $gdb_target($target,runlist)

    pref setd gdb/load/$target-runlist $run_list

  }

  pref set gdb/src/run_attach [lindex $run_list 0]

  pref set gdb/src/run_load   [lindex $run_list 1]

  pref set gdb/src/run_run    [lindex $run_list 2]

  pref set gdb/src/run_cont   [lindex $run_list 3]

  set err [catch {pref get gdb/load/$target-after_attaching} aa]

  if {$err} {

    set aa $gdb_target($target,after_attaching)

    pref setd gdb/load/$target-after_attaching $aa

  }

}

body TargetSelection::_init {} {

  if {!$trace_inited} {

    # Trace all gdb_loaded changes based on target

    trace variable gdb_loaded w [code TargetSelection::target_trace]

  }

  set trace_inited 1

  init_target_db        ;# initialize database

  _init_prefs   ;# initialize load prefs

  _init_target  ;# initialize target prefs

  set_saved

  # This tells us that the target system is inited.  Some of these

  # init functions need to be called every time the target dialog is

  # posted, some only once.  The latter functions can check inited to

  # see what they should do.

}

# ------------------------------------------------------------------

#  METHOD:  build_win - build the dialog

# ------------------------------------------------------------------

body TargetSelection::build_win {} {

  global tcl_platform PREFS_state gdb_ImageDir gdb_target_name

  set f [frame $itk_interior.f]

  set opts [frame $itk_interior.moreoptions]

  frame $itk_interior.moreoptionsframe

  set btns [frame $itk_interior.buttons]

  #labelled frame "Connection"

  iwidgets::Labeledframe $f.lab -labelpos nw -labeltext [gettext "Connection"]

  set fr [$f.lab childsite]

  # target name

  label $fr.tarl -text [gettext "Target:"]

  combobox::combobox $fr.tar -editable 0 -command [code $this change_target] \

    -width $Width -maxheight 10

  # baud rate combobox

  label $fr.cbl -text [gettext "Baud Rate:"]

  combobox::combobox $fr.cb -editable 0 -command [code $this change_baud] \

    -textvariable [pref varname gdb/load/$target-baud] -width $Width \

    -maxheight 10

  if {[catch {gdb_cmd "show remotebaud"} res]} {

    set baud [pref get gdb/load/$target-baud]

  } else {

    set baud [lindex $res end]

    set baud [string trimright $baud "."]

    # When uninitialized, GDB returns a baud rate of 2^32

    # Detect this and ignore it.

    if {$baud > 4000000000} {

      set baud [pref get gdb/load/$target-baud]

    } else {

      pref setd gdb/load/$target-baud $baud

    }

  }

  # host entry widget

  entry $fr.host -textvariable [pref varname gdb/load/$target-hostname] \

    -width $Width

  # port combobox

  if {$tcl_platform(platform) == "windows"} {

    set editable 0

  } else {

    set editable 1

  }

  label $fr.portl -text [gettext "Port:"]

  combobox::combobox $fr.port -editable $editable \

    -textvariable [pref varname gdb/load/$target-port] \

    -width $Width -maxheight 10

  # load baud rates into combobox

  fill_rates

  # load port combobox

  if {$tcl_platform(platform) == "windows"} {

    foreach val [port_list] {

      $fr.port list insert end $val

    }

  } else {

    # fixme:  how do I find valid values for these????

    switch $tcl_platform(os) {

      Linux { set ports [list /dev/cua0 /dev/ttyS0 /dev/ttyS1 /dev/ttyS2 /dev/ttyS3]}

      SunOS { set ports [list /dev/ttya /dev/ttyb] }

      AIX   { set ports [list /dev/foo1 /dev/foo2] }

      ULTRIX { set ports [list /dev/foo1 /dev/foo2] }

      IRIX   { set ports [list /dev/foo1 /dev/foo2] }

      OSF1   { set ports [list /dev/foo1 /dev/foo2] }

      NetBSD { set ports [list /dev/foo1 /dev/foo2] }

      HP-UX  {

        # Special case...

        switch -regexp $tcl_platform(osVersion) {

          A.09 { set ports [list /dev/tty00 /dev/tty01] }

          B.10 -

          B.11 { set ports [list /dev/tty0p0 /dev/tty1p0] }

        }

      }

      default { set ports [list UNKNOWN UNKNOWN] }

    }

    foreach val $ports {

      $fr.port list insert end $val

    }

  }

  # Port entry widget

  entry $fr.porte -textvariable [pref varname gdb/load/$target-port] -width $Width

  frame $f.fr

  checkbutton $f.fr.main -text [gettext "Set breakpoint at 'main'"] \

    -variable [pref varname gdb/load/main]

  checkbutton $f.fr.exit -text [gettext "Set breakpoint at 'exit'"] \

    -variable [pref varname gdb/load/exit]

  frame $f.fr.bp

  checkbutton $f.fr.bp.at_func -text [gettext "Set breakpoint at"] \

    -variable [pref varname gdb/load/bp_at_func]

  entry $f.fr.bp.func -textvariable [pref varname gdb/load/bp_func] -width 20

  checkbutton $f.fr.verb -text [gettext "Display Download Dialog"] \

    -variable [pref varname gdb/load/$target-verbose]

  checkbutton $f.fr.xterm -text [gettext "Use xterm as inferior's tty"] \

    -variable [pref varname gdb/process/xtermtty] \

    -onvalue yes -offvalue no

  if {![pref get gdb/control_target]} {

    $f.fr.main configure -state disabled

    $f.fr.exit configure -state disabled

    $f.fr.verb configure -state disabled

    $f.fr.bp.at_func configure -state disabled

    $f.fr.bp.func configure -state disabled

    checkbutton $f.fr.check -text [gettext "Compare to remote executable"] \

      -variable [pref varname gdb/load/check]

    if { $gdb_target_name == "exec" } {

      $f.fr.check configure -state disabled

    }

  }

  grid $fr.tarl $fr.tar -sticky w -padx 5 -pady 5

  grid $fr.cbl $fr.cb -sticky w -padx 5 -pady 5

  grid $fr.portl $fr.port -sticky w -padx 5 -pady 5

  set mapped1 $fr.cb

  set mapped2 $fr.port

  grid $f.fr.main -sticky w -padx 5 -pady 5

  grid $f.fr.exit -sticky w -padx 5 -pady 5

  pack $f.fr.bp.at_func $f.fr.bp.func -side left

  grid $f.fr.bp -sticky w -padx 5 -pady 5

  grid $f.fr.verb -sticky w -padx 5 -pady 5

  grid $f.fr.xterm -sticky w -padx 5 -pady 5

  if {![pref get gdb/control_target]} {

    grid $f.fr.check -sticky w -padx 5 -pady 5

  }

  grid $f.lab $f.fr -sticky w -padx 5 -pady 5

  # Create the "More Options" thingy

  if {[lsearch [image names] _MORE_] == -1} {

    image create photo _MORE_ -file [file join $gdb_ImageDir more.gif]

    image create photo _LESS_ -file [file join $gdb_ImageDir less.gif]

  }

  set MoreButton [button $opts.button -image _MORE_ \

                    -relief flat -command [code $this toggle_more_options]]

  set MoreLabel [label $opts.lbl -text {More Options}]

  frame $opts.frame -relief raised -bd 1

  pack $opts.button $opts.lbl -side left

  place $opts.frame -relx 1 -x -10 -rely 0.5 -relwidth 0.73 -height 2 -anchor e

  # Create the (hidden) more options frame

  set MoreFrame [iwidgets::Labeledframe $itk_interior.moreoptionsframe.frame \

                   -labelpos nw -labeltext {Run Options}]

  set frame [$MoreFrame childsite]

  set var [pref varname gdb/src/run_attach]

  checkbutton $frame.attach -text {Attach to Target} -variable $var

  set var [pref varname gdb/src/run_load]

  checkbutton $frame.load -text {Download Program} -variable $var

  set rm_frame [iwidgets::labeledframe $frame.run_method -labelpos nw -labeltext "Run Method" ]

  set RunMethod [ $rm_frame childsite ]

  set rm_label [label $frame.label -text "Run Method:"]

  set var [pref varname gdb/src/run_cont]

  radiobutton $RunMethod.cont -text {Continue from Last Stop} -value 1 -variable $var \

    -command [code $this set_run run]

  set var [pref varname gdb/src/run_run]

  radiobutton $RunMethod.run -text {Run Program} -value 1 -variable $var \

    -command [code $this set_run cont]

  # The after attaching command entry

  set _after_entry [entry $frame.aftere]

  label $frame.afterl -text {Command to issue after attaching:}

  grid $frame.label -column 1 -row 0 -sticky w

  grid $frame.attach -column 0 -row 1 -ipady 2

  grid $frame.load -column 0 -row 2 -ipady 2

  grid $RunMethod.run -column 0 -row 1 -sticky w -ipady 2

  grid $RunMethod.cont -column 0 -row 2 -sticky w -ipady 2

  grid $rm_frame -column 1 -row 1 -rowspan 2 -sticky nsew -ipady 2

  grid $frame.afterl -row 4 -sticky we -columnspan 2 -ipady 2

  grid $frame.aftere -sticky we -columnspan 2 -ipady 2

  grid columnconfigure $frame 0 -weight 1

  grid columnconfigure $frame 1 -weight 1

  # Map everything onto the screen

  # This looks like a possible packing bug -- our topmost frame

  # will not resize itself. So, instead, use the topmost frame.

  #pack $f $opts $itk_interior.moreoptionsframe -side top -fill x

  pack $MoreFrame -fill x -expand yes

  pack $f $opts -side top -fill x

  change_target $gdb_target($target,pretty-name)

  button $btns.ok -text [gettext OK] -width 7 -command [code $this save] \

    -default active

  button $btns.cancel -text [gettext Cancel] -width 7 \

    -command [code $this cancel]

  button $btns.help -text [gettext Help] -width 7 -command [code $this help] \

    -state disabled

  standard_button_box $btns

  bind $btns.ok  "$btns.ok flash; $btns.ok invoke"

  bind $btns.cancel  "$btns.cancel flash; $btns.cancel invoke"

  bind $btns.help  "$btns.help flash; $btns.help invoke"

  pack $btns -side bottom -anchor e

  focus $btns.ok

  # set up balloon help

  balloon register $f.fr.bp.at_func "Set User-Speficied Breakpoints at Run Time"

  balloon register $f.fr.bp.func "Enter a List of Functions for Breakpoints"

  window_name "Target Selection"

  if {[valid_target $target]} {

    $fr.tar configure -value $gdb_target($target,pretty-name)

  }

  fill_targets

}

# ------------------------------------------------------------------

#  METHOD:  set_saved - set saved values

# ------------------------------------------------------------------

body TargetSelection::set_saved {} {

  set saved_baud [pref get gdb/load/$target-baud]

  set saved_port [pref get gdb/load/$target-port]

  set saved_main [pref get gdb/load/main]

  set saved_exit [pref get gdb/load/exit]

  set saved_check [pref get gdb/load/check]

  set saved_verb [pref get gdb/load/$target-verbose]

  set saved_portname [pref get gdb/load/$target-portname]

  set saved_hostname [pref get gdb/load/$target-hostname]

  set saved_attach [pref get gdb/src/run_attach]

  set saved_load   [pref get gdb/src/run_load]

  set saved_run    [pref get gdb/src/run_run]

  set saved_cont   [pref get gdb/src/run_cont]

  if {[info exists gdb_target($target,options)]} {

    if {[catch {pref get gdb/load/$target-opts} saved_options]} {

      set saved_options ""

    }

  }

}

# ------------------------------------------------------------------

#  METHOD:  write_saved - write saved values to preferences

# ------------------------------------------------------------------

body TargetSelection::write_saved {} {

  pref setd gdb/load/$target-baud $saved_baud

  pref setd gdb/load/$target-port $saved_port

  pref setd gdb/load/main $saved_main

  pref setd gdb/load/exit $saved_exit

  pref setd gdb/load/check $saved_check

  pref setd gdb/load/$target-verbose $saved_verb

  pref setd gdb/load/$target-portname $saved_portname

  pref setd gdb/load/$target-hostname $saved_hostname

  pref setd gdb/load/$target-runlist [list $saved_attach $saved_load $saved_run $saved_cont]

  if {[info exists gdb_target($target,options)]} {

    pref setd gdb/load/$target-opts $saved_options

  }

  if {[catch {$_after_entry get} saved_after_attaching]} {

    set saved_after_attaching ""

  }

  pref setd gdb/load/$target-after_attaching $saved_after_attaching

}

# ------------------------------------------------------------------

#  METHOD:  fill_rates - fill baud rate combobox

# ------------------------------------------------------------------

body TargetSelection::fill_rates {} {

  $fr.cb list delete 0 end

  if {$gdb_target($target,baud-rates) != ""} {

    foreach val $gdb_target($target,baud-rates) {

      $fr.cb list insert end $val

    }

  }

}

# ------------------------------------------------------------------

#  METHOD:  fill_targets - fill target combobox

# ------------------------------------------------------------------

body TargetSelection::fill_targets {} {

  #[$fr.tar subwidget listbox] delete 0 end

  $fr.tar list delete 0 end

  foreach val $target_list {

    if {[info exists gdb_target($val,pretty-name)]} {

      $fr.tar list insert end $gdb_target($val,pretty-name)

      # Insert TCP target, if it exists

      if {[info exists gdb_target(${val}tcp,pretty-name)]} {

        $fr.tar list insert end $gdb_target(${val}tcp,pretty-name)

      }

    }

  }

}

# ------------------------------------------------------------------

#  METHOD:  config_dialog - Convenience method to map/unmap/rename

#            components onto the screen based on target T.

# ------------------------------------------------------------------

body TargetSelection::config_dialog {t} {

  pref define gdb/load/$t-verbose [pref get gdb/load/verbose]

  $f.fr.verb config -variable [pref varname gdb/load/$t-verbose]

  # Map the correct entries and comboboxes onto the screen

  if {$gdb_target($t,defbaud) == "TCP"} {

    # we have a tcp target

    # map host and porte

    if {$mapped1 != "$fr.host"} {

      grid forget $mapped1

      set mapped1 $fr.host

      grid $mapped1 -row 1 -column 1 -sticky w -padx 5 -pady 5

    }

    $fr.cbl configure -text "Hostname:"

    $fr.host config -textvariable [pref varname gdb/load/$t-hostname]

    if {$mapped2 != "$fr.porte"} {

      grid forget $mapped2

      set mapped2 $fr.porte

      grid $mapped2 -row 2 -column 1 -sticky w -padx 5 -pady 5

    }

    $fr.portl configure -text {Port:}

    $fr.porte config -textvariable [pref varname gdb/load/$t-portname] -fg black

    $mapped1 configure -state normal

    $mapped2 configure -state normal

  } elseif {$gdb_target($t,defbaud) == "ETH"} {

    # we have a udp target

    # map host and porte

    if {$mapped1 != "$fr.host"} {

      grid forget $mapped1

      set mapped1 $fr.host

      grid $mapped1 -row 1 -column 1 -sticky w -padx 5 -pady 5

    }

    $fr.cbl configure -text "Hostname:"

    $fr.host config -textvariable [pref varname gdb/load/$t-hostname]

    if {$mapped2 != "$fr.porte"} {

      grid forget $mapped2

    }

    $fr.portl configure -text {Port: N/A (fixed)}

    $mapped1 configure -state normal

    $mapped2 configure -state disabled

  } elseif {$gdb_target($t,defbaud) != ""} {

    # we have a serial target

    # map port and cb

    if {$mapped1 != "$fr.cb"} {

      grid forget $mapped1

      set mapped1 $fr.cb

      grid $mapped1 -row 1 -column 1 -sticky w -padx 5 -pady 5

    }

    $fr.cbl configure -text "Baud Rate:"

    $fr.cb configure -textvariable [pref varname gdb/load/$t-baud]

    if {$mapped2 != "$fr.port"} {

      grid forget $mapped2

      set mapped2 $fr.port

      grid $mapped2 -row 2 -column 1 -sticky w -padx 5 -pady 5

    }

    $fr.portl configure -text {Port:}

    $fr.port configure -textvariable [pref varname gdb/load/$t-port]

    $mapped1 configure -state normal

    $mapped2 configure -state normal

  } else {

    # we have a non-remote(-like) target

    # disable all (except tar) and check for

    # options

    $mapped1 configure -state disabled

    $mapped2 configure -state disabled

    $fr.porte configure -fg gray

    if {[info exists gdb_target($t,options)]} {

      if {$mapped1 != "$fr.host"} {

        grid forget $mapped1

        set mapped1 $fr.host

        grid $mapped1 -row 1 -column 1 -sticky w -padx 5 -pady 5

      }

      $mapped1 configure -state normal

      $fr.host config -textvariable [pref varname gdb/load/$t-opts]

      # We call options "arguments" for the exec target

      # FIXME: this is really overloaded!!

      if {$t == "exec"} {

        set text "Arguments:"

      } else {

        set text "Options:"

      }

      $fr.cbl configure -text $text

    }

  }

}

# ------------------------------------------------------------------

#  METHOD:  change_target - callback for target combobox

# ------------------------------------------------------------------

body TargetSelection::change_target {w {name ""}} {

  if {$name == ""} {return}

  set target [get_target $name]

  if { "$target" == "exec" } {

    $RunMethod.run configure -state disabled -value 1

    $RunMethod.cont configure -state disabled

  } else {

    $RunMethod.run configure -state normal

    $RunMethod.cont configure -state normal

  }

  debug "$target"

  set defbaud $gdb_target($target,defbaud)

  pref define gdb/load/$target-baud $defbaud

  pref define gdb/load/$target-portname 1234

  pref define gdb/load/$target-hostname [pref get gdb/load/default-hostname]

  if {$defbaud == ""} {

    pref define gdb/load/$target-port ""

  } else {

    pref define gdb/load/$target-port [pref get gdb/load/default-port]

  }

  config_dialog $target

  fill_rates

  # Configure the default run options for this target

  set err [catch {pref get gdb/load/$target-runlist} run_list]

  if {$err} {

    set run_list $gdb_target($target,runlist)

    pref setd gdb/load/$target-runlist $run_list

  }

  pref set gdb/src/run_attach [lindex $run_list 0]

  pref set gdb/src/run_load   [lindex $run_list 1]

  pref set gdb/src/run_run    [lindex $run_list 2]

  pref set gdb/src/run_cont   [lindex $run_list 3]

  set_check_button $name

  set err [catch {pref get gdb/load/$target-after_attaching} aa]

  if {$err} {

    set aa $gdb_target($target,after_attaching)

    pref setd gdb/load/$target-after_attaching $aa

  }

  $_after_entry delete 0 end

  $_after_entry insert 0 $aa

  set_saved

  set changes 0

}

# ------------------------------------------------------------------

#  PRIVATE METHOD:  change_baud - called when the baud rate is changed.

#  If GDB is running, set baud rate in GDB and read it back.

# ------------------------------------------------------------------

body TargetSelection::change_baud {w {baud ""}} {

  if {$baud != ""} {

    if {([string compare $baud "TCP"] != 0)

        && ([string compare $baud "ETH"] != 0)} {

      gdb_cmd "set remotebaud $baud"

      if {[catch {gdb_cmd "show remotebaud"} res]} {

        set newbaud 0

      } else {

        set newbaud [lindex $res end]

        set newbaud [string trimright $newbaud "."]

        if {$newbaud > 4000000} {

          set newbaud 0

        }

      }

      if {$newbaud != $baud} {

        pref set gdb/load/$target-baud $newbaud

      }

    }

  }

}

# ------------------------------------------------------------------

#  METHOD:  port_list - return a list of valid ports for Windows

# ------------------------------------------------------------------

body TargetSelection::port_list {} {

  set plist ""

  # Scan com1 - com8 trying to open each one.

  # If permission is denied that means it is in use,

  # which is OK because we may be using it or the user

  # may be setting up the remote target manually with

  # a terminal program.

  for {set i 1} {$i < 9} { incr i} {

    if {[catch { set fd [::open com$i: RDWR] } msg]} {

      # Failed.  Find out why.

      if {[string first "permission denied" $msg] != -1} {

        # Port is there, but busy right now. That's OK.

        lappend plist /dev/com$i

      }

    } else {

      # We got it.  Now close it and add to list.

      close $fd

      lappend plist /dev/com$i

    }

  }

  return $plist

}

# ------------------------------------------------------------------

#  METHOD:  get_target_list - return a list of targets supported

#  by this GDB.  Parses the output of "help target"

# ------------------------------------------------------------------

body TargetSelection::get_target_list {} {

  set native [native_debugging]

  set names ""

  set res [gdb_cmd "help target"]

  for  each line [split $res \n] {

    if {![string compare [lindex $line 0] "target"]} {

      set name [lindex $line 1]

      # For cross debuggers, do not allow the target "exec"

      if {$name == "exec" && !$native} {

        continue

      }

      lappend names $name

    }

  }

  return $names

}

# ------------------------------------------------------------------

#  METHOD:  save - save values

# ------------------------------------------------------------------

body TargetSelection::save {} {

  global gdb_target_name

  set err [catch {

    set_saved

    write_saved

    set gdb_target_name $target

    pref setd gdb/load/target $target

  } errtxt]

  if {$err} {debug "target: $errtxt"}

  if {[valid_target $gdb_target_name]} {

    # Dismiss the dialog box

    unpost

  } else {

    tk_messageBox -message "The current target is not valid."

  }

}

# ------------------------------------------------------------------

#  METHOD:  cancel - restore previous values

# ------------------------------------------------------------------

body TargetSelection::cancel {} {

  global gdb_target_name

  catch {gdb_cmd "set remotebaud $saved_baud"}

  $fr.cb configure -value $saved_baud

  write_saved

  if {$exportcancel} {

    set gdb_target_name CANCEL

  }

  # Now dismiss the dialog

  unpost

}

# ------------------------------------------------------------------

#  METHOD: set_check_button - enable/disable compare-section command

# ------------------------------------------------------------------

body TargetSelection::set_check_button {name} {

  if {[winfo exists  $itk_interior.f.fr.check]} {

    if { $name == "exec" } {

      $itk_interior.f.fr.check configure -state disabled

    } else {

      $itk_interior.f.fr.check configure -state normal

    }

  }

}

# ------------------------------------------------------------------

#  METHOD:  help - launches context sensitive help.

# ------------------------------------------------------------------

body TargetSelection::help {} {

}

# ------------------------------------------------------------------

#  METHOD:  reconfig - used when preferences change

# ------------------------------------------------------------------

body TargetSelection::reconfig {} {

  # for now, just delete and recreate

  destroy $itk_interior.f

  build_win

}

# ------------------------------------------------------------------

#  METHOD:  get_target - get the internal name of a target from the

#              pretty-name

# ------------------------------------------------------------------

body TargetSelection::get_target {name} {

  set t {}

  set list [array get gdb_target *,pretty-name]

  set i [lsearch -exact $list $name]

  if {$i != -1} {

    incr i -1

    set t [lindex [split [lindex $list $i] ,] 0]

  } else {

    debug "unknown pretty-name \"$name\""

  }

  return $t

}

# ------------------------------------------------------------------

#  METHOD: toggle_more_options -- toggle displaying the  More/Fewer

#                Options pane

# ------------------------------------------------------------------

body TargetSelection::toggle_more_options {} {

  if {[$MoreLabel cget -text] == "More Options"} {

    $MoreLabel configure -text "Fewer Options"

    $MoreButton configure -image _LESS_

    # Bug in Tk? The top-most frame does not shrink...

    #pack $MoreFrame

    pack $itk_interior.moreoptionsframe -after $itk_interior.moreoptions -fill both -padx 5 -pady 5

  } else {

    $MoreLabel configure -text "More Options"

    $MoreButton configure -image _MORE_

    #pack forget $MoreFrame

    pack forget $itk_interior.moreoptionsframe

  }

}

# ------------------------------------------------------------------

#  METHOD:  set_run - set the run button. Make sure not both run and

#                     continue are selected.

# ------------------------------------------------------------------

body TargetSelection::set_run {check_which} {

  global PREFS_state

  set var [pref varname gdb/src/run_$check_which]

  global $var

  if {[set $var]} {

    set $var 0

  }

}

# ------------------------------------------------------------------

#   PROCEDURE: target_trace

#          This procedure is used to configure gdb_loaded

#          and possible more) whenever the value of gdb_loaded

#          is changed based on the current target.

# ------------------------------------------------------------------

body TargetSelection::target_trace {variable index op} {

  global gdb_target_name gdb_loaded

  switch $gdb_target_name {

    exec {

      # The exec target is always loaded.

      set gdb_loaded 1

    }

  }

}

# Returns 1 if TARGET is a _runnable_ target for this gdb.

body TargetSelection::valid_target {target} {

  #set err [catch {gdb_cmd "help target $target"}]

  set err 0

  if {$target == "exec" && ![native_debugging]} {

    set err 1

  }

  if {[regexp "tcp$" $target]} {

    # Special case (of course)

    regsub tcp$ $target {} foo

    return [valid_target $foo]

  }

  return [expr {$err == 0}]

}

# Returns 1 if this is not a cross debugger.

body TargetSelection::native_debugging {} {

  global GDBStartup

  set r [string compare $GDBStartup(host_name) $GDBStartup(target_name)]

  return [expr {!$r}]

}