From owner-freebsd-current@FreeBSD.ORG  Fri Feb 11 09:44:58 2005
Return-Path: <owner-freebsd-current@FreeBSD.ORG>
Delivered-To: freebsd-current@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id 2986116A4CE
	for <freebsd-current@freebsd.org>;
	Fri, 11 Feb 2005 09:44:58 +0000 (GMT)
Received: from gatekeeper.syskonnect.de (gatekeeper.syskonnect.de
	[213.144.13.149])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 739DA43D48
	for <freebsd-current@freebsd.org>;
	Fri, 11 Feb 2005 09:44:57 +0000 (GMT)
	(envelope-from gheinig@syskonnect.de)
Received: from syskonnect.de (skd.de [10.9.15.1])j1B9j891017675;
	Fri, 11 Feb 2005 10:45:10 +0100 (MET)
Received: from syskonnect.de (localhost [127.0.0.1])
	by syskonnect.de (8.12.11/8.12.11) with ESMTP id j1B9iqMM025095;
	Fri, 11 Feb 2005 10:44:52 +0100 (MET)
Message-ID: <420C7E78.4010303@syskonnect.de>
Date: Fri, 11 Feb 2005 10:44:24 +0100
From: Gerald Heinig <gheinig@syskonnect.de>
User-Agent: Mozilla Thunderbird 0.5 (X11/20040208)
X-Accept-Language: en-us, en
MIME-Version: 1.0
To: Norikatsu Shigemura <nork@ninth-nine.com>
References: <420C76C3.202@syskonnect.de>	<420C77FB.5050805@syskonnect.de>
	<200502110928.j1B9Saij081996@sakura.ninth-nine.com>
In-Reply-To: <200502110928.j1B9Saij081996@sakura.ninth-nine.com>
Content-Type: text/plain; charset=us-ascii; format=flowed
Content-Transfer-Encoding: 7bit
cc: freebsd-current@freebsd.org
Subject: Re: gdb over Firewire
X-BeenThere: freebsd-current@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: Discussions about the use of FreeBSD-current
	<freebsd-current.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>,
	<mailto:freebsd-current-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-current>
List-Post: <mailto:freebsd-current@freebsd.org>
List-Help: <mailto:freebsd-current-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>,
	<mailto:freebsd-current-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Fri, 11 Feb 2005 09:44:58 -0000

Norikatsu Shigemura wrote:
> On Fri, 11 Feb 2005 10:16:43 +0100
> Gerald Heinig <gheinig@syskonnect.de> wrote:
> 
>>>Hello Current'ers,
>>>I'm trying to get two-machine kernel debugging over Firewire working, 
>>>unfortunately without much luck so far. dconschat over Firewire works 
>>>fine, but gdb won't attach, complaining about get_tty_state failed, 
>>>among other things.
>>>Is kernel gdb over Firewire a -current-only feature?
>>
>>Sorry, forgot to add: I'm using 5.3-RELEASE, hence the question about 
>>-current.
> 
> 
> 	I'm using kgdb over dconschat, well.  Do you add -G option?

Yes. My dconschat works fine. I'm using

dconschat -br -G 5556 -t TARGET

> 
> 	HOST:
> 		dconschat -G 12345 -r -t TARGET
> 		gdb -k /boot/kernel.TARGET/kernel.debug
> 		(kgdb) target remote :12345

My gdb doesn't support the -k option. I only have kgdb, which needs a 
remote device (I use /dev/fwmem0.0, as in the docs). That doesn't work.

# kgdb -r /dev/fwmem0.0 kernel.debug

[kgdb copyright stuff]
Switching to remote protocol
get_tty_state failed: Invalid argument
set_tty_state failed: Invalid argument
get_tty_state failed: Invalid argument
set_tty_state failed: Invalid argument
Couldn't establish connection to remote target
Reply contains invalid hex digit 12
kgdb>

That leads me to my question as to whether this is a -current-only feature.

Cheers,
Gerald