666 lines
19 KiB
Plaintext
666 lines
19 KiB
Plaintext
# Copyright 2000-2020 Free Software Foundation, Inc.
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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# This file is based on config/gdbserver.exp, which was written by
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# Michael Snyder (msnyder@redhat.com).
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#
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# To be addressed or set in your baseboard config file:
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#
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# set_board_info gdb_protocol "remote"
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# Unles you have a gdbserver that uses a different protocol...
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# After GDB starts you should check global $gdbserver_protocol instead as
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# the testfile may force a specific different target protocol itself.
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#
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# set_board_info gdb_server_prog
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# This will be the path to the gdbserver program you want to test.
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# Defaults to "gdbserver".
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#
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# set_board_info sockethost
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# The name of the host computer whose socket is being used.
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# Defaults to "localhost". Note: old gdbserver requires
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# that you define this, but libremote/gdbserver does not.
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#
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# set_board_info gdb,socketport
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# Port id to use for socket connection. If not set explicitly,
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# it will start at "2345" and increment for each use.
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# After GDB starts you should check global $gdbserver_gdbport for the
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# real port used. It is not useful if $gdbserver_reconnect_p was not set.
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#
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#
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# gdb_target_cmd_ext
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# Send gdb the "target" command. Returns 0 on success, 1 on failure, 2 on
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# unsupported.
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# If specified, then ADDITIONAL_TEXT must match the text that comes after
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# the connection message in order for the procedure to succeed.
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#
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proc gdb_target_cmd_ext { targetname serialport {additional_text ""} } {
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global gdb_prompt
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set serialport_re [string_to_regexp $serialport]
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for {set i 1} {$i <= 3} {incr i} {
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send_gdb "target $targetname $serialport\n"
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gdb_expect 60 {
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-re "A program is being debugged already.*ill it.*y or n. $" {
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send_gdb "y\n"
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exp_continue
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}
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-re "unknown host.*$gdb_prompt" {
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verbose "Couldn't look up $serialport"
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}
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-re "Couldn't establish connection to remote.*$gdb_prompt $" {
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verbose "Connection failed"
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}
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-re "Non-stop mode requested, but remote does not support non-stop.*$gdb_prompt $" {
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verbose "remote does not support non-stop"
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return 1
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}
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-re "Remote MIPS debugging.*$additional_text.*$gdb_prompt" {
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verbose "Set target to $targetname"
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return 0
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}
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-re "Remote debugging using .*$serialport_re.*$additional_text.*$gdb_prompt $" {
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verbose "Set target to $targetname"
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return 0
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}
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-re "Remote debugging using stdio.*$additional_text.*$gdb_prompt $" {
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verbose "Set target to $targetname"
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return 0
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}
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-re "Remote target $targetname connected to.*$additional_text.*$gdb_prompt $" {
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verbose "Set target to $targetname"
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return 0
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}
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-re "Connected to.*$additional_text.*$gdb_prompt $" {
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verbose "Set target to $targetname"
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return 0
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}
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-re "Ending remote.*$gdb_prompt $" { }
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-re "Connection refused.*$gdb_prompt $" {
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verbose "Connection refused by remote target. Pausing, and trying again."
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sleep 30
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continue
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}
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-re "Timeout reading from remote system.*$gdb_prompt $" {
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verbose "Got timeout error from gdb."
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}
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-notransfer -re "Remote debugging using .*\r\n> $" {
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# We got an unexpected prompt while creating the target.
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# Leave it there for the test to diagnose.
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return 1
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}
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-re ": Network is unreachable.\r\n.*$gdb_prompt $" {
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return 2
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}
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timeout {
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send_gdb ""
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break
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}
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}
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}
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return 1
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}
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# Like gdb_target_cmd_ext, but returns 0 on success, 1 on failure.
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proc gdb_target_cmd { args } {
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set res [eval gdb_target_cmd_ext $args]
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return [expr $res == 0 ? 0 : 1]
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}
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global portnum
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set portnum "2345"
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# Locate the gdbserver binary. Returns "" if gdbserver could not be found.
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proc find_gdbserver { } {
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global GDB
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global GDBSERVER
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if [info exists GDBSERVER] {
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return ${GDBSERVER}
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}
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if [target_info exists gdb_server_prog] {
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return [target_info gdb_server_prog]
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}
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set toplevel [file join [file dirname $GDB] .. gdbserver]
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foreach gdbserver [list "${GDB}server" $toplevel] {
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if { [file isdirectory $gdbserver] } {
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append gdbserver "/gdbserver"
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}
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if { [file executable $gdbserver] } {
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return $gdbserver
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}
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}
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return ""
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}
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# Return non-zero if we should skip gdbserver-specific tests.
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proc skip_gdbserver_tests { } {
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if { [find_gdbserver] == "" } {
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return 1
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}
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# If GDB is lack of XML support, and targets, like arm, have
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# multiple target descriptions, GDB doesn't know which target
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# description GDBserver uses, and may fail to parse 'g' packet
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# after connection.
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if { [gdb_skip_xml_test]
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&& ([istarget "arm*-*-linux*"]
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|| [istarget "mips*-*-linux*"]
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|| [istarget "powerpc*-*-linux*"]
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|| [istarget "s390*-*-linux*"]
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|| [istarget "x86_64-*-linux*"]
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|| [istarget "i\[34567\]86-*-linux*"]) } {
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return 1
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}
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return 0
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}
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# Download the currently loaded program to the target if necessary.
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# Return the target system filename.
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# NOTE: This was named "gdbserver_download", but that collides with the
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# dejagnu "download" API function when using load_generic_config "gdbserver".
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proc gdbserver_download_current_prog { } {
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global gdbserver_host_exec
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global gdbserver_host_mtime
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global gdbserver_server_exec
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global last_loaded_file
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if { ![info exists last_loaded_file] } {
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return ""
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}
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set host_exec $last_loaded_file
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# If we already downloaded a file to the target, see if we can reuse it.
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set reuse 0
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if { [info exists gdbserver_server_exec] } {
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set reuse 1
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# If the file has changed, we can not.
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if { $host_exec != $gdbserver_host_exec } {
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set reuse 0
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}
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# If the mtime has changed, we can not.
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if { [file mtime $host_exec] != $gdbserver_host_mtime } {
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set reuse 0
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}
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}
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if { $reuse == 0 } {
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set gdbserver_host_exec $host_exec
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set gdbserver_host_mtime [file mtime $host_exec]
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set gdbserver_server_exec [gdb_remote_download target $host_exec]
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}
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return $gdbserver_server_exec
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}
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# Default routine to compute the argument to "target remote".
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proc gdbserver_default_get_remote_address { host port } {
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# Historically HOST included the trailing ":".
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# To avoid breaking any board files out there we leave things alone.
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return "$host$port"
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}
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# Default routine to compute the "comm" argument for gdbserver.
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proc gdbserver_default_get_comm_port { port } {
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return "$port"
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}
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# Start a gdbserver process with initial OPTIONS and trailing ARGUMENTS.
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# The port will be filled in between them automatically.
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#
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# Returns the target protocol and socket to connect to.
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proc gdbserver_start { options arguments } {
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global portnum
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global GDB_TEST_SOCKETHOST
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# Port id -- either specified in baseboard file, or managed here.
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if [target_info exists gdb,socketport] {
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set portnum [target_info gdb,socketport]
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} else {
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# Bump the port number to avoid conflicts with hung ports.
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incr portnum
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}
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# Extract the local and remote host ids from the target board struct.
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if { [info exists GDB_TEST_SOCKETHOST] } {
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# The user is not supposed to provide a port number, just a
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# hostname/address, therefore we add the trailing ":" here.
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set debughost "${GDB_TEST_SOCKETHOST}:"
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# Escape open and close square brackets.
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set debughost_tmp [string map { [ \\[ ] \\] } $debughost]
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# We need a "gdbserver" version of the debughost, which will
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# have the possible connection prefix stripped. This is
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# because gdbserver currently doesn't recognize the prefixes.
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regsub -all "^\(tcp:|udp:|tcp4:|udp4:|tcp6:|udp6:\)" $debughost_tmp "" debughost_gdbserver
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} elseif [target_info exists sockethost] {
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set debughost [target_info sockethost]
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set debughost_gdbserver $debughost
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} else {
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set debughost "localhost:"
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set debughost_gdbserver $debughost
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}
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# Some boards use a different value for the port that is passed to
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# gdbserver and the port that is passed to the "target remote" command.
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# One example is the stdio gdbserver support.
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if [target_info exists gdb,get_remote_address] {
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set get_remote_address [target_info gdb,get_remote_address]
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} else {
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set get_remote_address gdbserver_default_get_remote_address
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}
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if [target_info exists gdbserver,get_comm_port] {
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set get_comm_port [target_info gdbserver,get_comm_port]
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} else {
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set get_comm_port gdbserver_default_get_comm_port
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}
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# Extract the protocol
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if [target_info exists gdb_protocol] {
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set protocol [target_info gdb_protocol]
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} else {
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set protocol "remote"
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}
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set gdbserver [find_gdbserver]
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# Loop till we find a free port.
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while 1 {
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# Fire off the debug agent.
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set gdbserver_command "$gdbserver"
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# If gdbserver_reconnect will be called $gdbserver_reconnect_p must be
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# set to true already during gdbserver_start.
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global gdbserver_reconnect_p
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global srcdir
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global subdir
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if {![info exists gdbserver_reconnect_p] || !$gdbserver_reconnect_p} {
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# GDB client could accidentally connect to a stale server.
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append gdbserver_command " --once"
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}
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# Enable debug if set.
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if [gdbserver_debug_enabled] {
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global gdbserverdebug
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set enabled 0
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foreach entry [split $gdbserverdebug ,] {
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switch -- $entry {
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"debug" {
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append gdbserver_command " --debug"
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set enabled 1
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}
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"remote" {
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append gdbserver_command " --remote-debug"
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set enabled 1
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}
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}
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}
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# Ensure debugfile is only added if something has been enabled
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if { $enabled } {
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set debugfile [standard_output_file gdbserver.debug]
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append gdbserver_command " --debug-file=$debugfile"
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}
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}
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if { $options != "" } {
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append gdbserver_command " $options"
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}
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if { $debughost_gdbserver != "" } {
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append gdbserver_command " $debughost_gdbserver"
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}
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if { $portnum != "" } {
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if { $debughost_gdbserver == "" } {
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append gdbserver_command " "
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}
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append gdbserver_command "[$get_comm_port $portnum]"
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}
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if { $arguments != "" } {
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append gdbserver_command " $arguments"
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}
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gdbserver_write_cmd_file $gdbserver_command
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global server_spawn_id
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set server_spawn_id [remote_spawn target $gdbserver_command]
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# GDBserver doesn't do inferior I/O through GDB. But we can
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# talk to the program using GDBserver's tty instead.
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global inferior_spawn_id
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set inferior_spawn_id $server_spawn_id
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# Wait for the server to open its TCP socket, so that GDB can connect.
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expect {
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-i $server_spawn_id
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-timeout 120
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-notransfer
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-re "Listening on" { }
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-re "Can't (bind address|listen on socket): Address already in use\\.\r\n" {
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verbose -log "Port $portnum is already in use."
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if ![target_info exists gdb,socketport] {
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# Bump the port number to avoid the conflict.
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wait -i $expect_out(spawn_id)
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incr portnum
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continue
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}
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}
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-re ".*: cannot resolve name: .*\r\n" {
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error "gdbserver cannot resolve name."
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}
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timeout {
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error "Timeout waiting for gdbserver response."
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}
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}
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break
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}
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return [list $protocol [$get_remote_address $debughost $portnum]]
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}
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# Start a gdbserver process running SERVER_EXEC, and connect GDB
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# to it. CHILD_ARGS are passed to the inferior.
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#
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# Returns the target protocol and socket to connect to.
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proc gdbserver_spawn { child_args } {
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set target_exec [gdbserver_download_current_prog]
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# Fire off the debug agent. This flavour of gdbserver takes as
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# arguments the port information, the name of the executable file to
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# be debugged, and any arguments.
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set arguments "$target_exec"
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if { $child_args != "" } {
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append arguments " $child_args"
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}
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return [gdbserver_start "" $arguments]
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}
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# Close the GDBserver connection.
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proc close_gdbserver {} {
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global server_spawn_id
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# We can't just call close, because if gdbserver is local then that means
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# that it will get a SIGHUP. Doing it this way could also allow us to
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# get at the inferior's input or output if necessary, and means that we
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# don't need to redirect output.
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if {![info exists server_spawn_id]} {
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return
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}
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verbose "Quitting GDBserver"
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catch "close -i $server_spawn_id"
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catch "wait -i $server_spawn_id"
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unset server_spawn_id
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}
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# Hook into GDB exit, and close GDBserver. We must load this
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# explicitly here, and rename the procedures we want to override.
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load_lib mi-support.exp
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if { [info procs gdbserver_orig_gdb_exit] == "" } {
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rename gdb_exit gdbserver_orig_gdb_exit
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rename mi_gdb_exit gdbserver_orig_mi_gdb_exit
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}
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proc gdbserver_gdb_exit { is_mi } {
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global gdb_spawn_id server_spawn_id
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global gdb_prompt
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global gdbserver_reconnect_p
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# Leave GDBserver running if we're exiting GDB in order to
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# reconnect to the same instance of GDBserver again.
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if {[info exists gdbserver_reconnect_p] && $gdbserver_reconnect_p} {
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if { $is_mi } {
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gdbserver_orig_mi_gdb_exit
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} else {
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gdbserver_orig_gdb_exit
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}
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return
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}
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if {[info exists gdb_spawn_id] && [info exists server_spawn_id]} {
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# GDB may be terminated in an expected way or an unexpected way,
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# but DejaGNU doesn't know that, so gdb_spawn_id isn't unset.
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# Catch the exceptions.
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catch {
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if { $is_mi } {
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set monitor_exit "-interpreter-exec console \"monitor exit\""
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} else {
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set monitor_exit "monitor exit"
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}
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send_gdb "$monitor_exit\n";
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# We use expect rather than gdb_expect because
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# we want to suppress printing exception messages, otherwise,
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# remote_expect, invoked by gdb_expect, prints the exceptions.
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expect {
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-i "$gdb_spawn_id" -re "$gdb_prompt $" {
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exp_continue
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}
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-i "$server_spawn_id" eof {
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wait -i $expect_out(spawn_id)
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unset server_spawn_id
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}
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}
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}
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}
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close_gdbserver
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if { $is_mi } {
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gdbserver_orig_mi_gdb_exit
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} else {
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gdbserver_orig_gdb_exit
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}
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}
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proc gdb_exit {} {
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gdbserver_gdb_exit 0
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}
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proc mi_gdb_exit {} {
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gdbserver_gdb_exit 1
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}
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# Start a gdbserver process running HOST_EXEC and pass CHILD_ARGS
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# to it. Return 0 on success, or non-zero on failure: 2 if gdbserver
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# failed to start or 1 if we couldn't connect to it.
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proc gdbserver_run { child_args } {
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global gdbserver_protocol
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global gdbserver_gdbport
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# Kill anything running before we try to start gdbserver, in case
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# we are sharing a serial connection.
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global gdb_prompt
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send_gdb "kill\n" optional
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gdb_expect 120 {
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-re "Kill the program being debugged. .y or n. $" {
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send_gdb "y\n"
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verbose "\t\tKilling previous program being debugged"
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exp_continue
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}
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-re "$gdb_prompt $" {
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# OK.
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}
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}
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if { [catch { gdbserver_spawn $child_args } res] == 1 } {
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perror $res
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return 2
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}
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set gdbserver_protocol [lindex $res 0]
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set gdbserver_gdbport [lindex $res 1]
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return [gdb_target_cmd $gdbserver_protocol $gdbserver_gdbport]
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}
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||
# Reconnect to the previous gdbserver session.
|
||
|
||
proc gdbserver_reconnect { } {
|
||
global gdbserver_protocol
|
||
global gdbserver_gdbport
|
||
|
||
global gdbserver_reconnect_p
|
||
if {![info exists gdbserver_reconnect_p] || !$gdbserver_reconnect_p} {
|
||
error "gdbserver_reconnect_p is not set before gdbserver_reconnect"
|
||
return 0
|
||
}
|
||
|
||
return [gdb_target_cmd $gdbserver_protocol $gdbserver_gdbport]
|
||
}
|
||
|
||
# Start gdbserver in extended mode with OPTIONS and connect to it. Note
|
||
# this frobs $gdbserver_protocol, so should be used only from a board
|
||
# that usually connects in target remote mode.
|
||
proc gdbserver_start_extended { {options ""} } {
|
||
global gdbserver_protocol
|
||
global gdbserver_gdbport
|
||
global use_gdb_stub
|
||
|
||
set gdbserver_options "--multi"
|
||
|
||
if { $options != "" } {
|
||
append gdbserver_options " $options"
|
||
}
|
||
|
||
if { [catch { gdbserver_start $gdbserver_options "" } res] == 1 } {
|
||
perror $res
|
||
return 2
|
||
}
|
||
set gdbserver_protocol [lindex $res 0]
|
||
if { [string first "extended-" $gdbserver_protocol] != 0} {
|
||
set gdbserver_protocol "extended-$gdbserver_protocol"
|
||
}
|
||
set gdbserver_gdbport [lindex $res 1]
|
||
|
||
# Even if the board file is testing with target remote, our caller
|
||
# wants to test against gdbserver in extended-remote mode. Make sure to
|
||
# disable stub-like techniques.
|
||
set use_gdb_stub 0
|
||
|
||
return [gdb_target_cmd $gdbserver_protocol $gdbserver_gdbport]
|
||
}
|
||
|
||
# Start and connect to a gdbserver in extended/multi mode. Unlike
|
||
# gdbserver_start_extended, this does not frob $gdbserver_protocol.
|
||
|
||
proc gdbserver_start_multi { } {
|
||
global gdbserver_protocol
|
||
global gdbserver_gdbport
|
||
|
||
if { [catch { gdbserver_start "--multi" "" } res] == 1 } {
|
||
perror $res
|
||
return 2
|
||
}
|
||
set gdbserver_protocol [lindex $res 0]
|
||
set gdbserver_gdbport [lindex $res 1]
|
||
|
||
return [gdb_target_cmd $gdbserver_protocol $gdbserver_gdbport]
|
||
}
|
||
|
||
# Start a gdbserver process in multi/extended mode, and have GDB
|
||
# connect to it (MI version). Return 0 on success, or non-zero on
|
||
# failure.
|
||
|
||
proc mi_gdbserver_start_multi { } {
|
||
global gdbserver_protocol
|
||
global gdbserver_gdbport
|
||
|
||
if { [catch { gdbserver_start "--multi" "" } res] == 1 } {
|
||
perror $res
|
||
return 2
|
||
}
|
||
set gdbserver_protocol [lindex $res 0]
|
||
set gdbserver_gdbport [lindex $res 1]
|
||
|
||
return [mi_gdb_target_cmd $gdbserver_protocol $gdbserver_gdbport]
|
||
}
|
||
|
||
# Check if debugging is enabled for gdbserver.
|
||
|
||
proc gdbserver_debug_enabled { } {
|
||
global gdbserverdebug
|
||
|
||
# If not already read, get the debug setting from environment or board setting.
|
||
if ![info exists gdbserverdebug] {
|
||
global env
|
||
if [info exists env(GDBSERVER_DEBUG)] {
|
||
set gdbserverdebug $env(GDBSERVER_DEBUG)
|
||
} elseif [target_info exists gdbserver,debug] {
|
||
set gdbserverdebug [target_info gdbserver,debug]
|
||
} else {
|
||
return 0
|
||
}
|
||
}
|
||
|
||
# Expand the all option
|
||
if { $gdbserverdebug == "all" } {
|
||
set gdbserverdebug "debug,remote,replay"
|
||
}
|
||
|
||
# Ensure it is not empty.
|
||
return [expr { $gdbserverdebug != "" }]
|
||
}
|
||
|
||
# Write the command line used to invocate gdbserver to the cmd file.
|
||
|
||
proc gdbserver_write_cmd_file { cmdline } {
|
||
set logfile [standard_output_file_with_gdb_instance gdbserver.cmd]
|
||
set cmd_file [open $logfile w]
|
||
puts $cmd_file $cmdline
|
||
catch "close $cmd_file"
|
||
}
|
||
|
||
# Override gdb_debug_init so that we can set replay logging in GDB if required.
|
||
# Backup the original function so we can call it afterwards
|
||
|
||
rename gdb_debug_init _gdb_debug_init
|
||
|
||
proc gdb_debug_init { } {
|
||
global gdbserverdebug
|
||
global gdb_prompt
|
||
|
||
if [gdbserver_debug_enabled] {
|
||
foreach entry [split $gdbserverdebug ,] {
|
||
if { $entry == "replay" } {
|
||
set replayfile [standard_output_file_with_gdb_instance gdbserver.replay]
|
||
send_gdb "set remotelogfile $replayfile\n" optional
|
||
gdb_expect 10 {
|
||
-re "$gdb_prompt $" {}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
# Now call the standard debug init function
|
||
_gdb_debug_init
|
||
}
|