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gdbserver
!!!gdbserver
NAME
SYNOPSIS
DESCRIPTION
OPTIONS
SEE ALSO
COPYING
----
!!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 `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


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


target


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


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


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'.
!!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.
!!SEE ALSO


`__gdb__' entry in __info__; ''Using GDB: A Guide to
the GNU Source-Level Debugger'', 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 permission notice identical
to this one.


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.
----
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Last edited on Monday, June 3, 2002 6:50:15 pm by "perry"
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