From owner-freebsd-hackers@FreeBSD.ORG Mon Jun 11 16:34:14 2012 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 836B01065673 for ; Mon, 11 Jun 2012 16:34:14 +0000 (UTC) (envelope-from nagpersonal@gmail.com) Received: from mail-pz0-f54.google.com (mail-pz0-f54.google.com [209.85.210.54]) by mx1.freebsd.org (Postfix) with ESMTP id 549E38FC08 for ; Mon, 11 Jun 2012 16:34:14 +0000 (UTC) Received: by dadv36 with SMTP id v36so5900442dad.13 for ; Mon, 11 Jun 2012 09:34:14 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:date:message-id:subject:from:to:content-type; bh=eB3kk5N+nGKN1dyewLBe7v/ipBVXWbFaQ0kpw7Bfbxc=; b=eBk0CZRDpLzjDlFxn6suLmFFUpFSDxWuRTnc8G09NuM9Hzkjo+SHSrG/hD5hKITMbS erFlrd7/nVwE/70XmGJMEoINJ5lnfq4FFMl8wFlHwGb8kU7in2AWev94t0qqQ7QY05mw hIJwQ3+B4zRSfudqfzlDXR7iwu8GphyrhPsXXJqlWwbkNxxkJzO8lB0T91Y4Vqo2aAUI BZ9NxMcd0zuxXcgB345BtBstD9WsrzfYroRhutumDoGNAjsXxDiMk/VODjYVazLif8Ei kH3DafvJvrkIfcJ9fzlhcbI8qtKleZggfdsNUyyq6ncCAwDoNMtOgcjn6yxOpHFl6UdH h5PA== MIME-Version: 1.0 Received: by 10.68.234.104 with SMTP id ud8mr27739649pbc.163.1339432453936; Mon, 11 Jun 2012 09:34:13 -0700 (PDT) Received: by 10.66.87.136 with HTTP; Mon, 11 Jun 2012 09:34:13 -0700 (PDT) Date: Mon, 11 Jun 2012 09:34:13 -0700 Message-ID: From: nagarjuna vempati To: freebsd-hackers@freebsd.org Content-Type: text/plain; charset=ISO-8859-1 X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Subject: Issue with KGDB setup. System freezes when it enters ddb X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 11 Jun 2012 16:34:14 -0000 Hello, Can someone plese help me understand what is the problem? After fresh disk installation of freeBSD9.0 AMD64 from disk, I copied /usr/src/sys/am64/conf/GENERIC to KGDBKERNEL and added following lines to the file options GDB options DDB options KDB_UNATTENDED options BREAK_TO_DEBUGGER options ALT_BREAK_TO_DEBUGGER After this I rebuilt the Kernel and installed as below. make buildworld make buildkernel kernconf=KGDBKERNEL make installkernel kernconf=KGDBKERNEL Reboot into single user mode. mergemaster -p make installworld mergemaster Reboot. After this to setup KGDB I am using following document as my reference. http://chetanbl.blogspot.com/ To break into ddb I am trying issue sysctl debug.kdb.enter=1. Then the system becomes unresponsive. Also, I tried to enter ddb at booting stage by issuing boot -d command. Even then system becomes unresponsive. I need to solve this problem ASAP. Can someone helpme? Thanks, Nag