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Date: Fri, 15 Nov 2002 12:38:54 -0800
From: William Lee Irwin III <wli@holomorphy.com>
To: Kallol Biswas <kallol.biswas@efi.com>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: lan based kgdb
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On Fri, Nov 15, 2002 at 12:29:18PM -0800, Kallol Biswas wrote:
> Is there a source level remote kernel debugger that
> communicates over an ethernet interface? The debugger
> kgdb from kgdb.sourceforge.net works only with serial port.

With some hacking to produce a polling network driver, it should very
well be possible to provide a communication back-end for a gdb stub
that uses an ethernet NIC.

gdb itself is already perfectly capable of communicating with
such targets, using the specifier

	target remote otherhost:1234

where 1234 is the port number the gdb stub on the target reserves for
itself to communicate with the host. It's probably best to use a
dedicated network interface, though it's not absolutely required. (With
a dedicated interface otherhost will then be the interface's hostname.)

A serious issue is that the communication protocol is somewhat more
complex, so there is a possibility the debug runtime will not be robust.

Bill
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