gdbserver-support.exp [plain text]
# Copyright 2000, 2002, 2003, 2004, 2005 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 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
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. $" {
send_gdb "y\n"
exp_continue
}
-re "Couldn't establish connection to remote.*$gdb_prompt" {
verbose "Connection failed"
}
-re "Remote MIPS debugging.*$gdb_prompt" {
verbose "Set target to $targetname"
return 0
}
-re "Remote debugging using .*$serialport.*$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."
}
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
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
}
# 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 { server_exec child_args } {
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]
# Export the host:port pair.
set gdbport $debughost$portnum
# 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 gdbserver_command "$gdbserver :$portnum $server_exec"
if { $child_args != "" } {
append gdbserver_command " $child_args"
}
set server_spawn_id [remote_spawn target $gdbserver_command]
# Wait for the server to produce at least one line and an additional
# character of output. This will wait until any TCP socket has been
# created, so that GDB can connect.
expect {
-i $server_spawn_id
-notransfer
-re ".*\n." { }
}
# 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
-re "." { }
eof {
# The spawn ID is already closed now (but not yet waited for).
wait -i $expect_out(spawn_id)
}
}
return [list $protocol $gdbport]
}
proc infer_host_exec { } {
set host_exec ""
send_gdb "info files\n"
gdb_expect 30 {
-re "Symbols from \"(\[^\"\]+)\"" {
set host_exec $expect_out(1,string)
exp_continue
}
-re "Local exec file:\[\r\n\]+\[ \t\]*`(\[^'\]+)'," {
set host_exec $expect_out(1,string)
exp_continue
}
-re "$gdb_prompt $" { }
}
return $host_exec
}
# Start a gdbserver process running HOST_EXEC and pass CHILD_ARGS
# to it. Return 0 on success, or non-zero on failure.
proc gdbserver_load { host_exec child_args } {
global gdbserver_host_exec
global gdbserver_server_exec
# If we weren't passed an explicit binary, try to reuse the current
# one. If we were, be sure to redownload it.
if { $host_exec == "" && $gdbserver_host_exec == "" } {
set gdbserver_host_exec [infer_host_exec]
} elseif { $host_exec != "" } {
set gdbserver_host_exec $host_exec
if [info exists gdbserver_server_exec] { unset gdbserver_server_exec }
}
if { ! [info exists gdbserver_server_exec] } {
if [is_remote target] {
set gdbserver_server_exec [remote_download target $host_exec /tmp/[file tail $gdbserver_host_exec].[pid]]
} else {
set gdbserver_server_exec $gdbserver_host_exec
}
}
set res [gdbserver_spawn $gdbserver_server_exec $child_args]
set protocol [lindex $res 0]
set gdbport [lindex $res 1]
if { $host_exec != "" } {
if [gdb_file_cmd $host_exec] {
return -1
}
}
gdb_target_cmd $protocol $gdbport
}