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#   Copyright 1993, 1997, 1998, 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 <http://www.gnu.org/licenses/>.

# This file was written by Ian Lance Taylor <ian@cygnus.com>.

# GDB support routines for a board using the MIPS remote debugging
# protocol.  These are actually pretty generic.

# DejaGnu currently assumes that debugging is being done over the main
# console port.  It would probably be more convenient for people using
# IDT boards to permit the debugging port and the connected port to be
# different, since an IDT board has two ports.  This would require
# extending some of the tests in a fashion similar to that done for
# VxWorks, because the test output would appear on the other port,
# rather than being displayed by gdb.

load_lib remote.exp
load_lib gdb.exp
set gdb_prompt "\\(gdb\\)"

#
# gdb_load -- load a file into the GDB. 
#             Returns a 0 if there was an error,
#                       1 if it load successfully.
#
proc gdb_load { arg } {
    global verbose
    global loadpath
    global loadfile
    global gdb_prompt
    global GDB
    global expect_out

    set loadfile [file tail $arg]
    set loadpath [file dirname $arg]

    gdb_file_cmd $arg

    if [target_info exists gdb_protocol] {
        set protocol [target_info gdb_protocol];
    } else {
        set protocol "sparclite"
    }

    if [target_info exists serial] {
        set targetname [target_info serial];
        set command "target $protocol [target_info serial]\n";
    } else {
        if ![target_info exists netport] {
            perror "Need either netport or gdb_serial entry for [target_info name].";
            return -1;
        }
        set targetname [target_info netport];
        set command "target $protocol udp [target_info netport]\n";
    }
    set timeout 60
    verbose "Timeout is now $timeout seconds" 2
    set try_count 0;
    send_gdb $command;
    gdb_expect {
         -re "Unknown response.*resetting the board.|remote timeout" {
            incr try_count;
            if { $try_count > 3 } {
                set try_count 0;
                reboot_target;
                sleep 5;
            }
            sleep 1;
            send_gdb $command;
            exp_continue;
        }
         -re "Remote target.*$gdb_prompt $" { }
         -re ".*SPARClite appears to be alive.*$gdb_prompt $"   {
            if $verbose>1 then {
                send_user "Set target to $targetname\n"
            }
        }
         timeout { 
            perror "Couldn't set SLITE target."
            set timeout 10
            verbose "Timeout is now $timeout seconds" 2
            return -1
        }
    }
    
    if [target_info exists gdb_load_offset] {
        set offset "[target_info gdb_load_offset]";
    } else {
        set offset "";
    }
    if { 1 } {
        if [is_remote host] {
            set arg [remote_download host $arg];
            if { $arg == "" } {
                error "download failed"
                return -1;
            }
        }
        send_gdb "load $arg $offset\n"
        verbose "Loading $arg into $GDB" 2
        set timeout 2400
        verbose "Timeout is now $timeout seconds" 2
        gdb_expect {
             -re "Loading.*$gdb_prompt $" {
                verbose "Loaded $arg into $GDB" 1
                set timeout 30
                verbose "Timeout is now $timeout seconds" 2
            }
             -re "$gdb_prompt $"     {
                if $verbose>1 then {
                    perror "GDB couldn't load."
                }
            }
             timeout {
                if $verbose>1 then {
                    perror "Timed out trying to load $arg."
                }
            }
        }
    }
    # Some SPARClite boards automagically do a run after the program is
    # loaded.
    if [target_info exists need_monitor_run] {
        set timeout 10
        verbose "Timeout is now $timeout seconds, doing monitor run" 2
        send_gdb "monitor run\n";
        sleep 2;
        send_gdb "";
        gdb_expect {
             -re ".*$gdb_prompt $" { verbose "Run command succeded" }
             default {
                perror "error sending monitor run command";
            }
        }
    } else {
        sleep 2;
    }

    if [target_info exists gdb_serial] {
        set serial [target_info gdb_serial];
    } else {
        set serial [target_info serial];
    }
    send_gdb "target remote $serial\n"
    set timeout 60
    verbose "Timeout is now $timeout seconds" 2
    gdb_expect {
         -re ".*Kill it?.*y or n.*" {
            send_gdb "y\n";
            exp_continue
        }
         -re ".*$gdb_prompt $"  {
            verbose "Set remote target to [target_info serial]" 2
        }
         timeout {
            perror "Couldn't set remote target."
            set timeout 10
            verbose "Timeout is now $timeout seconds" 2
            return -1
        }
    }

    if [info exists expect_out(buffer)] then {
        send_log $expect_out(buffer)
    }
    return 0
}