NAME
    gdbserver - Remote Server for the GNU Debugger

SYNOPSIS
    gdbserver
    tty prog [args...]

    gdbserver tty --attach PID

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 `gdb-
    server' 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 neces-
    sary 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 exam-
    ple:

   (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'.

OPTIONS
    You have to supply the name of the program to debug and the tty to com-
    municate on; the remote GDB will do everything else. Any remaining
    arguments will be passed to the program verbatim.

SEE ALSO
    `gdb' entry in info; Using GDB: A Guide to the GNU Source-Level Debug-
    ger, Richard M. Stallman and Roland H. Pesch, July 1991.

COPYING
    Copyright (c) 1993 Free Software Foundation, Inc.

    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.

    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 per-
    mission notice identical to this one.

    Permission is granted to copy and distribute translations of this man-
    ual into another language, under the above conditions for modified ver-
    sions, except that this permission notice may be included in transla-
    tions approved by the Free Software Foundation instead of in the origi-
    nal English.