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.\" Copyright (C) 1993 Free Software Foundation, Inc.

.\" See section COPYING for conditions for redistribution

.TH gdbserver 1 "2 November 1993" "Cygnus Support" "GNU Development Tools"

.SH NAME

gdbserver \- Remote Server for the GNU Debugger

.SH SYNOPSIS

.na

.TP

.B gdbserver

.RB tty

.RB prog

.RB "[\|" args... "\|]"

.PP

.B gdbserver

.RB tty

.B --attach

.RB PID

.ad b

.SH DESCRIPTION

GDBSERVER is a program that allows you to run GDB on a different machine

than the one which is running the program being debugged.

Usage (server (target) side):

First, you need to have a copy of the program you want to debug put onto

the target system.  The program can be stripped to save space if needed, as

GDBserver doesn't care about symbols.  All symbol handling is taken care of by

the GDB running on the host system.

To use the server, you log on to the target system, and run the `gdbserver'

program.  You must tell it (a) how to communicate with GDB, (b) the name of

your program, and (c) its arguments.  The general syntax is:

        target> gdbserver COMM PROGRAM [ARGS ...]

For example, using a serial port, you might say:

        target> gdbserver /dev/com1 emacs foo.txt

This tells gdbserver to debug emacs with an argument of foo.txt, and to

communicate with GDB via /dev/com1.  Gdbserver now waits patiently for the

host GDB to communicate with it.

To use a TCP connection, you could say:

        target> gdbserver host:2345 emacs foo.txt

This says pretty much the same thing as the last example, except that we are

going to communicate with the host GDB via TCP.  The `host:2345' argument means

that we are expecting to see a TCP connection from `host' to local TCP port

2345.  (Currently, the `host' part is ignored.)  You can choose any number you

want for the port number as long as it does not conflict with any existing TCP

ports on the target system.  This same port number must be used in the host

GDBs `target remote' command, which will be described shortly.  Note that if

you chose a port number that conflicts with another service, gdbserver will

print an error message and exit.

On some targets, gdbserver can also attach to running programs.

This is accomplished via the --attach argument.  The syntax is:

        target> gdbserver COMM --attach PID

PID is the process ID of a currently running process.  It isn't

necessary to point gdbserver at a binary for the running process.

Usage (host side):

You need an unstripped copy of the target program on your host system, since

GDB needs to examine it's symbol tables and such.  Start up GDB as you normally

would, with the target program as the first argument.  (You may need to use the

--baud option if the serial line is running at anything except 9600 baud.)

Ie: `gdb TARGET-PROG', or `gdb --baud BAUD TARGET-PROG'.  After that, the only

new command you need to know about is `target remote'.  It's argument is either

a device name (usually a serial device, like `/dev/ttyb'), or a HOST:PORT

descriptor.  For example:

        (gdb) target remote /dev/ttyb

communicates with the server via serial line /dev/ttyb, and:

        (gdb) target remote the-target:2345

communicates via a TCP connection to port 2345 on host `the-target', where

you previously started up gdbserver with the same port number.  Note that for

TCP connections, you must start up gdbserver prior to using the `target remote'

command, otherwise you may get an error that looks something like

`Connection refused'.

.SH OPTIONS

You have to supply the name of the program to debug

and the tty to communicate on; the remote GDB will do everything else.

Any remaining arguments will be passed to the program verbatim.

.SH "SEE ALSO"

.RB "`\|" gdb "\|'"

entry in

.B info\c

\&;

.I

Using GDB: A Guide to the GNU Source-Level Debugger\c

, Richard M. Stallman and Roland H. Pesch, July 1991.

.SH COPYING

Copyright (c) 1993 Free Software Foundation, Inc.

.PP

Permission is granted to make and distribute verbatim copies of

this manual provided the copyright notice and this permission notice

are preserved on all copies.

.PP

Permission is granted to copy and distribute modified versions of this

manual under the conditions for verbatim copying, provided that the

entire resulting derived work is distributed under the terms of a

permission notice identical to this one.

.PP

Permission is granted to copy and distribute translations of this

manual into another language, under the above conditions for modified

versions, except that this permission notice may be included in

translations approved by the Free Software Foundation instead of in

the original English.