# Copyright 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.
# 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
}