From owner-freebsd-current@FreeBSD.ORG  Thu Aug 11 19:33:51 2005
Return-Path: <owner-freebsd-current@FreeBSD.ORG>
X-Original-To: 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 1276116A41F
	for <current@freebsd.org>; Thu, 11 Aug 2005 19:33:51 +0000 (GMT)
	(envelope-from marcel@xcllnt.net)
Received: from ns1.xcllnt.net (209-128-86-226.BAYAREA.NET [209.128.86.226])
	by mx1.FreeBSD.org (Postfix) with ESMTP id B328D43D55
	for <current@freebsd.org>; Thu, 11 Aug 2005 19:33:50 +0000 (GMT)
	(envelope-from marcel@xcllnt.net)
Received: from [192.168.4.250] (dhcp50.pn.xcllnt.net [192.168.4.250])
	by ns1.xcllnt.net (8.13.4/8.13.4) with ESMTP id j7BJXlm4004744;
	Thu, 11 Aug 2005 12:33:50 -0700 (PDT)
	(envelope-from marcel@xcllnt.net)
In-Reply-To: <200508111052.01305.lonnie.vanzandt@ngc.com>
References: <200508040940.56172.lonnie.vanzandt@ngc.com>
	<200508111009.53939.lonnie.vanzandt@ngc.com>
	<1E8A49C9-D0E7-43CF-A3AC-CEA50B1A3135@xcllnt.net>
	<200508111052.01305.lonnie.vanzandt@ngc.com>
Mime-Version: 1.0 (Apple Message framework v733)
Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed
Message-Id: <B1FF6781-1F0E-42A5-8D9D-FCA0ACFC5AD5@xcllnt.net>
Content-Transfer-Encoding: 7bit
From: Marcel Moolenaar <marcel@xcllnt.net>
Date: Thu, 11 Aug 2005 12:33:46 -0700
To: lonnie.vanzandt@ngc.com
X-Mailer: Apple Mail (2.733)
Cc: current@freebsd.org
Subject: Re: Missing a step in new(er) Remote gdb/kdb setup?
X-BeenThere: freebsd-current@freebsd.org
X-Mailman-Version: 2.1.5
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: Thu, 11 Aug 2005 19:33:51 -0000


On Aug 11, 2005, at 9:52 AM, Lonnie VanZandt wrote:

> forgive me for grasping for straws, but, might I hope that those  
> fixes are
> related to segfaults on initial connections? ;-)  If so, what is  
> the nature
> of the fix?

Yes. The problem is that when support for -r was added, it was
forgotten that the code so far assumed there was a KVM session
open. With -r, kgdb does not open a KVM session. This causes
various NULL-pointer dereferences. The fix is to check first if
a KVM session is open and do whatever is appropriate in that
case.

-- 
  Marcel Moolenaar         USPA: A-39004          marcel@xcllnt.net