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.\" Copyright 1993 Free Software Foundation, Inc.
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.\" See section COPYING for conditions for redistribution
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.TH gdbserver 1 "2 November 1993" "Cygnus Support" "GNU Development Tools"
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.SH NAME
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gdbserver \- Remote Server for the GNU Debugger
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.SH SYNOPSIS
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.na
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.TP
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.B gdbserver
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.RB tty
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.RB prog
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.RB "[\|" args... "\|]"
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.ad b
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.SH DESCRIPTION
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GDBSERVER is a program that allows you to run GDB on a different machine
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than the one which is running the program being debugged.
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Usage (server (target) side):
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First, you need to have a copy of the program you want to debug put onto
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the target system.  The program can be stripped to save space if needed, as
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GDBserver doesn't care about symbols.  All symbol handling is taken care of by
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the GDB running on the host system.
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To use the server, you log on to the target system, and run the `gdbserver'
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program.  You must tell it (a) how to communicate with GDB, (b) the name of
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your program, and (c) its arguments.  The general syntax is:
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        target> gdbserver COMM PROGRAM [ARGS ...]
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For example, using a serial port, you might say:
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        target> gdbserver /dev/com1 emacs foo.txt
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This tells gdbserver to debug emacs with an argument of foo.txt, and to
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communicate with GDB via /dev/com1.  Gdbserver now waits patiently for the
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host GDB to communicate with it.
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To use a TCP connection, you could say:
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        target> gdbserver host:2345 emacs foo.txt
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This says pretty much the same thing as the last example, except that we are
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going to communicate with the host GDB via TCP.  The `host:2345' argument means
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that we are expecting to see a TCP connection from `host' to local TCP port
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2345.  (Currently, the `host' part is ignored.)  You can choose any number you
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want for the port number as long as it does not conflict with any existing TCP
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ports on the target system.  This same port number must be used in the host
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GDBs `target remote' command, which will be described shortly.  Note that if
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you chose a port number that conflicts with another service, gdbserver will
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print an error message and exit.
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Usage (host side):
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You need an unstripped copy of the target program on your host system, since
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GDB needs to examine it's symbol tables and such.  Start up GDB as you normally
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would, with the target program as the first argument.  (You may need to use the
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--baud option if the serial line is running at anything except 9600 baud.)
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Ie: `gdb TARGET-PROG', or `gdb --baud BAUD TARGET-PROG'.  After that, the only
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new command you need to know about is `target remote'.  It's argument is either
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a device name (usually a serial device, like `/dev/ttyb'), or a HOST:PORT
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descriptor.  For example:
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        (gdb) target remote /dev/ttyb
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communicates with the server via serial line /dev/ttyb, and:
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        (gdb) target remote the-target:2345
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communicates via a TCP connection to port 2345 on host `the-target', where
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you previously started up gdbserver with the same port number.  Note that for
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TCP connections, you must start up gdbserver prior to using the `target remote'
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command, otherwise you may get an error that looks something like
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`Connection refused'.
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.SH OPTIONS
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You have to supply the name of the program to debug
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and the tty to communicate on; the remote GDB will do everything else.
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Any remaining arguments will be passed to the program verbatim.
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.SH "SEE ALSO"
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.RB "`\|" gdb "\|'"
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entry in
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.B info\c
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\&;
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.I
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Using GDB: A Guide to the GNU Source-Level Debugger\c
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, Richard M. Stallman and Roland H. Pesch, July 1991.
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.SH COPYING
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Copyright (c) 1993 Free Software Foundation, Inc.
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.PP
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Permission is granted to make and distribute verbatim copies of
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this manual provided the copyright notice and this permission notice
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are preserved on all copies.
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.PP
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Permission is granted to copy and distribute modified versions of this
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manual under the conditions for verbatim copying, provided that the
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entire resulting derived work is distributed under the terms of a
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permission notice identical to this one.
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.PP
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Permission is granted to copy and distribute translations of this
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manual into another language, under the above conditions for modified
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versions, except that this permission notice may be included in
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translations approved by the Free Software Foundation instead of in
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the original English.

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