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# Copyright 2000, 2002, 2003, 2004, 2005, 2006, 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 is based on config/gdbserver.exp, which was written by
# Michael Snyder (msnyder@redhat.com).
#
# To be addressed or set in your baseboard config file:
#
# set_board_info gdb_protocol "remote"
# Unles you have a gdbserver that uses a different protocol...
#
# set_board_info gdb_server_prog
# This will be the path to the gdbserver program you want to test.
# Defaults to "gdbserver".
#
# set_board_info sockethost
# The name of the host computer whose socket is being used.
# Defaults to "localhost". Note: old gdbserver requires
# that you define this, but libremote/gdbserver does not.
#
# set_board_info gdb,socketport
# Port id to use for socket connection. If not set explicitly,
# it will start at "2345" and increment for each use.
#
#
# gdb_target_cmd
# Send gdb the "target" command
#
proc gdb_target_cmd { targetname serialport } {
global gdb_prompt
set serialport_re [string_to_regexp $serialport]
for {set i 1} {$i <= 3} {incr i} {
send_gdb "target $targetname $serialport\n"
gdb_expect 60 {
-re "A program is being debugged already.*ill it.*y or n. $" {
send_gdb "y\n"
exp_continue
}
-re "unknown host.*$gdb_prompt" {
verbose "Couldn't look up $serialport"
}
-re "Couldn't establish connection to remote.*$gdb_prompt $" {
verbose "Connection failed"
}
-re "Remote MIPS debugging.*$gdb_prompt" {
verbose "Set target to $targetname"
return 0
}
-re "Remote debugging using .*$serialport_re.*$gdb_prompt $" {
verbose "Set target to $targetname"
return 0
}
-re "Remote target $targetname connected to.*$gdb_prompt $" {
verbose "Set target to $targetname"
return 0
}
-re "Connected to.*$gdb_prompt $" {
verbose "Set target to $targetname"
return 0
}
-re "Ending remote.*$gdb_prompt $" { }
-re "Connection refused.*$gdb_prompt $" {
verbose "Connection refused by remote target. Pausing, and trying again."
sleep 30
continue
}
-re "Timeout reading from remote system.*$gdb_prompt $" {
verbose "Got timeout error from gdb."
}
-notransfer -re "Remote debugging using .*\r\n> $" {
# We got an unexpected prompt while creating the target.
# Leave it there for the test to diagnose.
return 1
}
timeout {
send_gdb ""
break
}
}
}
return 1
}
global portnum
set portnum "2345"
# Locate the gdbserver binary. Returns "" if gdbserver could not be found.
proc find_gdbserver { } {
global GDB
global GDBSERVER
if [info exists GDBSERVER] {
return ${GDBSERVER}
}
if [target_info exists gdb_server_prog] {
return [target_info gdb_server_prog]
}
set gdbserver "${GDB}server"
if { [file isdirectory $gdbserver] } {
append gdbserver "/gdbserver"
}
if { [file executable $gdbserver] } {
return $gdbserver
}
return ""
}
# Return non-zero if we should skip gdbserver-specific tests.
proc skip_gdbserver_tests { } {
if { [find_gdbserver] == "" } {
return 1
}
return 0
}
# Download the currently loaded program to the target if necessary.
# Return the target system filename.
# NOTE: This was named "gdbserver_download", but that collides with the
# dejagnu "download" API function when using load_generic_config "gdbserver".
proc gdbserver_download_current_prog { } {
global gdbserver_host_exec
global gdbserver_host_mtime
global gdbserver_server_exec
global last_loaded_file
set host_exec $last_loaded_file
# If we already downloaded a file to the target, see if we can reuse it.
set reuse 0
if { [info exists gdbserver_server_exec] } {
set reuse 1
# If the file has changed, we can not.
if { $host_exec != $gdbserver_host_exec } {
set reuse 0
}
# If the mtime has changed, we can not.
if { [file mtime $host_exec] != $gdbserver_host_mtime } {
set reuse 0
}
}
if { $reuse == 0 } {
set gdbserver_host_exec $host_exec
set gdbserver_host_mtime [file mtime $host_exec]
if [is_remote target] {
set gdbserver_server_exec [gdb_download $host_exec]
} else {
set gdbserver_server_exec $host_exec
}
}
return $gdbserver_server_exec
}
# Start a gdbserver process with initial OPTIONS and trailing ARGUMENTS.
# The port will be filled in between them automatically.
#
# Returns the target protocol and socket to connect to.
proc gdbserver_start { options arguments } {
global portnum
# Port id -- either specified in baseboard file, or managed here.
if [target_info exists gdb,socketport] {
set portnum [target_info gdb,socketport]
} else {
# Bump the port number to avoid conflicts with hung ports.
incr portnum
}
# Extract the local and remote host ids from the target board struct.
if [target_info exists sockethost] {
set debughost [target_info sockethost]
} else {
set debughost "localhost:"
}
# Extract the protocol
if [target_info exists gdb_protocol] {
set protocol [target_info gdb_protocol]
} else {
set protocol "remote"
}
set gdbserver [find_gdbserver]
# Loop till we find a free port.
while 1 {
# Export the host:port pair.
set gdbport $debughost$portnum
# Fire off the debug agent.
set gdbserver_command "$gdbserver"
if { $options != "" } {
append gdbserver_command " $options"
}
append gdbserver_command " :$portnum"
if { $arguments != "" } {
append gdbserver_command " $arguments"
}
set server_spawn_id [remote_spawn target $gdbserver_command]
# Wait for the server to open its TCP socket, so that GDB can connect.
expect {
-i $server_spawn_id
-notransfer
-re "Listening on" { }
-re "Can't bind address: Address already in use\\.\r\n" {
verbose -log "Port $portnum is already in use."
if ![target_info exists gdb,socketport] {
# Bump the port number to avoid the conflict.
wait -i $expect_out(spawn_id)
incr portnum
continue
}
}
}
break
}
# We can't just call close, because if gdbserver is local then that means
# that it will get a SIGHUP. Doing it this way could also allow us to
# get at the inferior's input or output if necessary, and means that we
# don't need to redirect output.
expect_background {
-i $server_spawn_id
full_buffer { }
eof {
# The spawn ID is already closed now (but not yet waited for).
wait -i $expect_out(spawn_id)
}
}
return [list $protocol $gdbport]
}
# Start a gdbserver process running SERVER_EXEC, and connect GDB
# to it. CHILD_ARGS are passed to the inferior.
#
# Returns the target protocol and socket to connect to.
proc gdbserver_spawn { child_args } {
set target_exec [gdbserver_download_current_prog]
# Fire off the debug agent. This flavour of gdbserver takes as
# arguments the port information, the name of the executable file to
# be debugged, and any arguments.
set arguments "$target_exec"
if { $child_args != "" } {
append arguments " $child_args"
}
return [gdbserver_start "" $arguments]
}
# Start a gdbserver process running HOST_EXEC and pass CHILD_ARGS
# to it. Return 0 on success, or non-zero on failure.
proc gdbserver_run { child_args } {
global gdbserver_protocol
global gdbserver_gdbport
# Kill anything running before we try to start gdbserver, in case
# we are sharing a serial connection.
global gdb_prompt
send_gdb "kill\n"
gdb_expect 120 {
-re "Kill the program being debugged. .y or n. $" {
send_gdb "y\n"
verbose "\t\tKilling previous program being debugged"
exp_continue
}
-re "$gdb_prompt $" {
# OK.
}
}
set res [gdbserver_spawn $child_args]
set gdbserver_protocol [lindex $res 0]
set gdbserver_gdbport [lindex $res 1]
return [gdb_target_cmd $gdbserver_protocol $gdbserver_gdbport]
}
# Reconnect to the previous gdbserver session.
proc gdbserver_reconnect { } {
global gdbserver_protocol
global gdbserver_gdbport
return [gdb_target_cmd $gdbserver_protocol $gdbserver_gdbport]
}
# Start and connect to a gdbserver in extended mode.
proc gdbserver_start_extended { } {
set res [gdbserver_start "--multi" ""]
set gdbserver_protocol "extended-[lindex $res 0]"
set gdbserver_gdbport [lindex $res 1]
return [gdb_target_cmd $gdbserver_protocol $gdbserver_gdbport]
}