From owner-freebsd-hackers@FreeBSD.ORG Mon May 17 13:04:21 2004 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 26AD516A4CE for ; Mon, 17 May 2004 13:04:21 -0700 (PDT) Received: from ns1.xcllnt.net (209-128-86-226.BAYAREA.NET [209.128.86.226]) by mx1.FreeBSD.org (Postfix) with ESMTP id 6C47E43D41 for ; Mon, 17 May 2004 13:04:20 -0700 (PDT) (envelope-from marcel@xcllnt.net) Received: from ns1.xcllnt.net (localhost [127.0.0.1]) by ns1.xcllnt.net (8.12.11/8.12.11) with ESMTP id i4HK4He1067460; Mon, 17 May 2004 13:04:18 -0700 (PDT) (envelope-from marcel@ns1.xcllnt.net) Received: (from marcel@localhost) by ns1.xcllnt.net (8.12.11/8.12.11/Submit) id i4HK4HnU067459; Mon, 17 May 2004 13:04:17 -0700 (PDT) (envelope-from marcel) Date: Mon, 17 May 2004 13:04:17 -0700 From: Marcel Moolenaar To: Mark Kettenis Message-ID: <20040517200417.GA67285@ns1.xcllnt.net> References: <200405171132.i4HBW0h5012696@elgar.kettenis.dyndns.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200405171132.i4HBW0h5012696@elgar.kettenis.dyndns.org> User-Agent: Mutt/1.5.5.1i cc: freebsd-hackers@freebsd.org cc: tech-toolchain@netbsd.org cc: gdb-patches@sources.redhat.com Subject: Re: [PATCH/RFC] *BSD kernel debugging X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 17 May 2004 20:04:21 -0000 On Mon, May 17, 2004 at 01:32:00PM +0200, Mark Kettenis wrote: > I've recently implemented support for kvm(3)-based debugging that > works for all three BSD's. The interface is fairly simple, just start > GDB on a kernel binary, i.e. *snip* > All that's needed is a bit of new code (bsd-kvm.[ch]) and a support > function in the appropriate *-nat.c file; because it is built on top > of kvm(3) this is native-only. I've added a preliminary patch with > some sample code. > > If there are no objections I'll check this in in a week or so. I've been working on a different scheme for FreeBSD that supports kernel threads and kernel modules and also works on non-i386 and non-amd64 systems without any gdb changes (at least, that's the intend -- I'm not far enough in the development to have a working prototype of all features). Anyway, it uses the remote protocol to establish an IPC pipe between gdb and some front-end that knows about the quirks of the kernel and its core files and isn't an inherently native solution. I cannot prevent you from committing this, but if it doesn't address the items mentioned above, it may not be used on FreeBSD. Unless I'm being relieved of gdb duties of course :-) FYI, -- Marcel Moolenaar USPA: A-39004 marcel@xcllnt.net