# Copyright 2011-2013 Free Software Foundation, Inc.

# 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 3 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, see <http://www.gnu.org/licenses/>.

# This file is a dejagnu "board file" and is used to run the testsuite
# with a remotehost and gdbserver using stdio for communicating through
# ssh. Certain firewalls prevent gdbserver from using the usual mechanism of
# listening on a remote port, so use stdio via ssh instead.
#
# To use this file:
# bash$ cd ${build_dir}/gdb
# bash$ make check RUNTESTFLAGS="--target_board=remote-stdio-gdbserver \
#    REMOTE_USERNAME=... REMOTE_HOSTNAME=... REMOTE_PORTNUM=... \
#    [REMOTE_TMPDIR=${remote_dir}] [GDBSERVER=${remote_gdbserver}]"

load_board_description "native-stdio-gdbserver"

set_board_info rsh_prog /usr/bin/ssh
set_board_info rcp_prog /usr/bin/scp

# Test machine info. The generic_config gdbserver reads some of these
# values from board_info, so this file must set them there.
if [info exists REMOTE_USERNAME] {
    set_board_info username $REMOTE_USERNAME
} else {
    set_board_info username unspecified_username
}
if [info exists REMOTE_HOSTNAME] {
    set_board_info hostname $REMOTE_HOSTNAME
} else {
    set_board_info hostname unspecified_hostname
}
if [info exists REMOTE_PORTNUM] {
    set_board_info portnum $REMOTE_PORTNUM
}

# Some remote machines don't have writable home directories.
if [info exists REMOTE_TMPDIR] {
    set_board_info remotedir $REMOTE_TMPDIR
}

unset_board_info gdb_server_prog
set_board_info gdb_server_prog "/usr/bin/gdbserver"

# Used to pass a value between ${board}_spawn and ${board}_get_remote_address.
set stdio_gdbserver_command "--unset--"

proc get_remote_login { } {
    set result ""
    if {[board_info [target_info name] exists username]} {
	append result "[board_info [target_info name] username]@"
    }
    if {[board_info [target_info name] exists hostname]} {
	append result "[board_info [target_info name] hostname]"
    }
    if {[board_info [target_info name] exists portnum]} {
	append result ":[board_info [target_info name] portnum]"
    }
    return $result
}

proc ${board}_build_remote_cmd { cmd } {
    set stdio_gdbserver_template "| @RSH_CMD@ @GDBSERVER_PROG@ @ARGS@ stdio @PROG_AND_ARGS@"

    # First parse $cmd, picking out the various pieces.
    set gdbserver_prog [lindex $cmd 0]
    set args ""
    set len [llength $cmd]

    for { set i 1 } { $i < $len } { incr i } {
	set elm [lindex $cmd $i]
	switch $elm {
	    --multi {
		set args "$args $elm"
	    }
	    --once {
		set args "$args $elm"
	    }
	    default {
		break
	    }
	}
    }

    set prog_and_args [lrange $cmd $i end]

    set buf $stdio_gdbserver_template

    set rsh_cmd "[board_info [target_info name] rsh_prog] [get_remote_login]"
    regsub {@RSH_CMD@} $buf $rsh_cmd buf
    regsub {@GDBSERVER_PROG@} $buf $gdbserver_prog buf
    regsub {@ARGS@} $buf $args buf
    regsub {@PROG_AND_ARGS@} $buf $prog_and_args buf

    return $buf
}

proc ${board}_download { board host dest } {
    if { [board_info [target_info name] exists remotedir] } {
	set remotedir "[board_info [target_info name] remotedir]/"
    } else {
	set remotedir ""
    }
    return [standard_download $board $host "$remotedir$dest"]
}

proc ${board}_upload {dest srcfile args} {
    return [standard_upload $dest $srcfile $args]
}

proc ${board}_file { dest op args } {
    if { $op == "delete" } {
	return [remote_exec [get_remote_login] "rm -f $args"]
    }
    return [eval [list standard_file $dest $op] $args]
}