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#   Copyright (C) 1996, 1997 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 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.

# Please email any bugs, comments, and/or additions to this file to:
# DejaGnu@cygnus.com

# This file was written by Michael Snyder <msnyder@cygnus.com>.

# GDB support routines for a board using the sparclet remote debugging
# protocol.

load_lib remote.exp
load_lib gdb.exp

#
# Sparclet remote run command.
#

proc gdb_start { } {
    global gdb_prompt

    if ![file exists loader] {
        global libdir
        set loader loader;

        if [target_info exists gdb_stub_offset] {
            set result [target_compile "${libdir}/stub-loader.c" $loader executable "libs=-Wl,-Ttext,[target_info gdb_stub_offset]"];
        } else {
            set result [target_compile "${libdir}/stub-loader.c" $loader executable "ldscript=[target_info gdb_stub_ldscript]"];
        }
    }

    verbose -log "$gdb_prompt is gdb prompt"

    set result 0;
    for { set y 0; } { $y < 4 } { incr y } {
        if { [default_gdb_start] != 0 } {
            return -1;
        }

        if [target_info exists baud] {
            send_gdb "set remotebaud [target_info baud]\n"
            gdb_expect {
                -re "$gdb_prompt" { }
                default { 
                    perror "Error setting baud rate."
                    return -1;
                }
            }
        }

        for {set x 1;} { $x < 4 } {incr x} {
            set result [gdb_sparclet_startup $result];
            if { $result > 0 } {
                return 1;
            }
            # mmmmm, magic numbers.
            if { $result == -42 || $result == -43 } {
                break;
            } else {
                reboot_target;
            }
        }
        if { $x == 4 } {
            return -1;
        }
        gdb_exit;
        sleep 5;
    }
    return -1;
}

proc gdb_sparclet_startup { arg } {
    global gdb_prompt
    global GDB
    global verbose

    set is_running_stub 0;

    if [target_info exists serial] {
        set serial [target_info serial];
    } else {
        set serial [target_info netport];
    }
    set protocol [target_info gdb_protocol];
    set check_stub 1;
    if { $arg != -42 } {
        send_gdb "target $protocol $serial\n";
        # 10 seconds may be a bit short.
        gdb_expect 10 {
            -re "already.*y or n." {
                gdb_send "y\n";
                exp_continue;
            }
            -re "Remote target.*connected to.*$gdb_prompt" { set check_stub 0; }
            -re "$gdb_prompt" { }
            timeout { }
        }
        if { $check_stub } {
            verbose "timed out, checking if stub is already running"
            send_gdb "\003";
            sleep 1;
            send_gdb "\003";
            gdb_expect 10 {
                -re "$gdb_prompt" { }
                default {
                    remote_close host;
                    return -42;
                }
            }
        }
    }
    if [target_info exists gdb_serial] {
        set gdb_serial [target_info gdb_serial];
    } else {
        set gdb_serial $serial;
    }
    if { $check_stub } {
        send_gdb "target remote $gdb_serial\n";
        gdb_expect 15 {
            -re "Remote debugging.*$gdb_prompt" {
                verbose "stub is already running"
                set is_running_stub 1;
            }
            default {
                warning "board isn't responding";
                remote_close host;
                remote_reboot target;
                return -43;
            }
        }
    }

    if { $is_running_stub == 0 } {
        global srcdir

        if [is_remote host] {
            set loader [remote_download host "loader"];
        } else {
            set loader "loader";
        }
        send_gdb "file $loader\n";
        gdb_expect {
             -re "A program is being debug.*Kill it.*y or n. $" {
                send_gdb "y\n"
                exp_continue
            }
             -re "Load new symbol table.*y or n. $" {
                send_gdb "y\n"
                exp_continue
            }
             -re "Reading symbols from.*done..*$gdb_prompt $" {}
             -re "$gdb_prompt $" { perror "GDB couldn't find loader" }
             timeout { 
                perror "(timeout) read symbol file" ; 
                return -1
            }
        }

        send_gdb "target $protocol $serial\n";
        gdb_expect {
             -re "Remote target.*connected to.*$gdb_prompt" { }
             default {
                perror "Error reconnecting to board.";
                return -1;
            }
        }

        send_gdb "load $loader [target_info gdb_stub_offset]\n"
        verbose "Loading $loader into $GDB" 2
        set no_run_command 0;
        gdb_expect 1200 {
             -re "Loading.*$gdb_prompt $" {
                verbose "Loaded $loader into $GDB" 1
            }
            -re "Transfer rate:.*Switching to remote protocol.*Remote debugging" {
                set no_run_command 1;
            }
             -re "$gdb_prompt $"     {
                if $verbose>1 then {
                    perror "GDB couldn't load."
                }
            }
             timeout {
                if $verbose>1 then {
                    perror "Timed out trying to load $arg."
                }
            }
        }

        if !$no_run_command {
            send_gdb "run\n";
            gdb_expect 60 {
                -re "A program is being debug.*Kill it.*y or n. $" {
                    send_gdb "y\n"
                    exp_continue
                }
                -re "The program being debugged .*y or n. $" {
                    send_gdb "y\n"
                    exp_continue
                }
                -re "Starting program:.*loader.*$" { 
                    verbose "Starting loader succeeded" 
                }
                timeout { 
                    perror "(timeout) starting the loader" ; 
                    return -1 
                }
                default {
                    perror "error starting the loader";
                }
            }
        }
        sleep 2;
        send_gdb ""
        sleep 1;
        send_gdb ""
        verbose "Sent ^C^C"
        gdb_expect 10 {
             -re "Give up .and stop debugging it.*$" {
                send_gdb "y\n"
                exp_continue
            }
            -re "$gdb_prompt $" { 
                verbose "Running loader succeeded" 
            }
            timeout { 
                warning "(timeout) interrupting the loader" ;
                remote_close host;
            }
            default {
                warning "error interrupting the loader";
            }
        }

        gdb_exit;
        return [gdb_start];
    }
    return 1;
}

proc gdb_run_cmd { args } {
    global gdb_prompt

    gdb_breakpoint exit;
    send_gdb "set \$fp=0\n";
    gdb_expect {
         -re "$gdb_prompt" { }
    }
    # This is needed for the SparcLite. Whee.
    if [target_info exists gdb,start_symbol] {
        set start_comm "jump *[target_info gdb,start_symbol]\n";
    } else {
        set start_comm "jump *start\n";
    }
    send_gdb "break copyloop\n";
    gdb_expect 10 {
        -re "Breakpoint.*$gdb_prompt $" {
            set start_comm "continue\n";
        }
        -re "$gdb_prompt $" { }
        timeout { warning "break copyloop failed badly"; }
    }
    send_gdb $start_comm;
    gdb_expect 10 {
        -re "y or n. $" {
            remote_send host "y\n"
            exp_continue;
        }
        -re "Breakpoint.*in copyloop.*$gdb_prompt $" {
            remote_send host "jump relocd\n";
            exp_continue;
        }
        -re "Continuing at.*\[\r\n\]" { }
        default {
            return -1;
        }
    }

    return "";
}


#
# 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]

    set protocol [target_info gdb_protocol];

    if [is_remote host] {
        set arg [remote_download host $arg];
    }
    send_gdb "file $arg\n"
    gdb_expect 30 {
         -re "A program is being debug.*Kill it.*y or n. $" {
            send_gdb "y\n"
            exp_continue
        }
         -re "Load new symbol table.*y or n. $" {
            send_gdb "y\n"
            exp_continue
        }
         -re "Reading symbols from.*done..*$gdb_prompt $" {}
         -re "$gdb_prompt $" { perror "GDB couldn't read file" }
         timeout { 
            perror "(timeout) read symbol file" ; 
            return -1 
        }
    }

    if [target_info exists gdb_serial] {
        set gdb_serial [target_info gdb_serial];
    } else {
        if [target_info exists serial] {
            set gdb_serial [target_info serial];
        } else {
            set gdb_serial [target_info netport];
        }
    }
    send_gdb "target remote $gdb_serial\n"
    gdb_expect 30 {
        -re "Kill it?.*y or n.*" {
            send_gdb "y\n";
            exp_continue
        }
        -re "$gdb_prompt $"     {
            verbose "Set remote target to $gdb_serial" 2
        }
        timeout { 
            perror "Couldn't set remote target."
            return -1
        }
    }
    if [target_info exists gdb_load_offset] {
        set offset "[target_info gdb_load_offset]";
    } else {
        set offset "";
    }
    send_gdb "load $arg $offset\n"
    verbose "Loading $arg into $GDB" 2
    gdb_expect 1200 {
         -re "Loading.*$gdb_prompt $" {
            verbose "Loaded $arg into $GDB" 1
        }
         -re "$gdb_prompt $"     {
            if $verbose>1 then {
                perror "GDB couldn't load."
            }
        }
         timeout {
            if $verbose>1 then {
                perror "Timed out trying to load $arg."
            }
        }
    }
    send_gdb "list main\n";
    gdb_expect 60 {
         -re "$gdb_prompt" { }
         default {
            perror "command for list main never completed";
            return -1;
        }
    }

    return 0
}