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# Test Framework Driver for GDB driving an external simulator

#   Copyright 1999, 2001, 2007, 2008, 2009, 2010

#   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 .

load_lib gdb.exp

proc sid_start {} {

    global verbose

    set port [lindex [split [target_info netport] ":"] 1]

    # Set a default endianness

    case [target_info multilib_flags] in {

        { *big-endian* *-EB* *-meb* } { set sidendian "-EB" }

        { *little-endian* *-EL* *-mel* } { set sidendian "-EL" }

        default {

            if {[target_info exists sim,defaultendian]} then {

                set sidendian [target_info sim,defaultendian]

            } else {

                # rely on endianness settings in sid configuration defaults

                set sidendian ""

            }

        }

    }

    case $sidendian in {

        { -EB } { set sidendian2 {-e "set cpu endian big"} }

        { -EL } { set sidendian2 {-e "set cpu endian little"} }

        default { set sidendian2 {} }

    }

    # test to see whether to use use sid in build or install tree

    set use_build_tree [file exists ../../sid]

    if {$use_build_tree} then {

        set pre_spawn {

            global env

            set env(SID_LIBRARY_PATH) [join [glob "../../sid/component/*"] ":"]

            set env(SID) "../../sid/main/dynamic/sid"

            if {! [file exists $env(SID)]} then { error "Cannot find sid in build tree" }

        }

        if { [board_info target sim,protocol] == "sid" } {

            set spawncmd "[target_info sim] [target_info sim,options] $sidendian2 -e \"set cpu-gdb-socket sockaddr-local 0.0.0.0:$port\""

        } elseif { [board_info target sim,protocol] == "rawsid" } {

            set spawncmd "[target_info sim] [target_info sim,options] -$sidendian --gdb=$port"

        } else {

            set spawncmd "../../sid/bsp/[target_info sim] $sidendian --gdb=$port [target_info sim,options]"

        }

        set post_spawn {

            global env

            unset env(SID_LIBRARY_PATH)

            unset env(SID)

        }

    } else {

        set pre_spawn {}

        if { [board_info target sim,protocol] == "sid" } {

            # FIXME: sim,options may be from the build tree, should find

            # it in the install tree.

            set spawncmd "sid [target_info sim,options] $sidendian2 -e \"set cpu-gdb-socket sockaddr-local 0.0.0.0:$port\""

        } elseif { [board_info target sim,protocol] == "rawsid" } {

            set spawncmd "[target_info sim] [target_info sim,options] -$sidendian --gdb=$port"

        } else {

            set spawncmd "[target_info sim] $sidendian --gdb=$port [target_info sim,options]"

        }

        set post_spawn {}

    }

    eval $pre_spawn

    if {[catch [list remote_spawn host $spawncmd] msg]} {

        perror $msg

        exit 1

    }

    eval $post_spawn

    # Don't do the following any more; it breaks with "runtest ... < /dev/null"

#    expect_background {

#       -re \[^\n\]*\n {

#           regsub "\n" $expect_out(buffer) {} msg

#           verbose "SID: $msg" 2

#       }

#    }

    # There should be no need to sleep to give SID time to start;

    # GDB would wait for a fair while for the stub to respond.

    sleep 4

    if ![target_info exists gdb,no_push_conn] {

        remote_push_conn host;

    }

}

#

# Handle GDB talking to SID

#

proc gdb_start {} {

    sid_start

    return [default_gdb_start]

}

proc sid_exit {} {

    if ![target_info exists gdb,no_push_conn] {

        remote_close host;

        remote_pop_conn host;

    }

}

proc gdb_exit {} {

    set result [default_gdb_exit]

    sid_exit

    return $result

}

#

# gdb_target_sid

# Set gdb to target the simulator

#

proc send_target_sid { } {

    # wait a little while, giving sid time to shut down & restart its

    # gdb socket

    sleep 4

    send_gdb "target [target_info gdb_protocol] [target_info netport]\n"

}

proc gdb_target_sid { } {

    global gdb_prompt

    global exit_status

    send_target_sid

    global timeout

    set prev_timeout $timeout

    set timeout 60

    verbose "Timeout is now $timeout seconds" 2

    gdb_expect {

        -re ".*\[Ee\]rror.*$gdb_prompt $" {

            perror "Couldn't set target for remote simulator."

            cleanup

            gdb_exit

        }

        -re "Remote debugging using.*$gdb_prompt"       {

            verbose "Set target to sid"

        }

        timeout {

            perror "Couldn't set target for remote simulator."

            cleanup

            gdb_exit

        }

    }

    set timeout $prev_timeout

    verbose "Timeout is now $timeout seconds" 2

}

#

# gdb_load -- load a file into the debugger.

#             return a -1 if anything goes wrong.

#

proc gdb_load { arg } {

    global verbose

    global loadpath

    global loadfile

    global GDB

    global gdb_prompt

    global retval

    if { $arg != "" } {

        if [gdb_file_cmd $arg] then { return -1 }

    }

    gdb_target_sid

    send_gdb "load\n"

    global timeout

    set prev_timeout $timeout

    set timeout 2400

    verbose "Timeout is now $timeout seconds" 2

    gdb_expect {

        -re ".*\[Ee\]rror.*$gdb_prompt $" {

            if $verbose>1 then {

                perror "Error during download."

            }

            set retval -1;

        }

        -re ".*$gdb_prompt $" {

            if $verbose>1 then {

                send_user "Loaded $arg into $GDB\n"

            }

            set retval 0;

        }

        -re "$gdb_prompt $"     {

            if $verbose>1 then {

                perror "GDB couldn't load."

            }

            set retval -1;

        }

        timeout {

            if $verbose>1 then {

                perror "Timed out trying to load $arg."

            }

            set retval -1;

        }

    }

    set timeout $prev_timeout

    verbose "Timeout is now $timeout seconds" 2

    return $retval;

}