From owner-freebsd-current@FreeBSD.ORG  Mon Jun  7 09:14:29 2004
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 971F016A4CE
	for <freebsd-current@freebsd.org>;
	Mon,  7 Jun 2004 09:14:29 +0000 (GMT)
Received: from itchy.rabson.org (mailgate.nlsystems.com [80.177.232.242])
	by mx1.FreeBSD.org (Postfix) with ESMTP id BF4A143D58
	for <freebsd-current@freebsd.org>;
	Mon,  7 Jun 2004 09:14:28 +0000 (GMT)
	(envelope-from dfr@nlsystems.com)
Received: from ns0.nlsystems.com (ns0.nlsystems.com [80.177.232.243])
	by itchy.rabson.org (8.12.11/8.12.11) with ESMTP id i579A4n8016672
	for <freebsd-current@freebsd.org>;
	Mon, 7 Jun 2004 10:10:04 +0100 (BST)
	(envelope-from dfr@nlsystems.com)
From: Doug Rabson <dfr@nlsystems.com>
To: freebsd-current@freebsd.org
Date: Mon, 7 Jun 2004 10:14:21 +0100
User-Agent: KMail/1.6.1
References: <Pine.GSO.4.10.10406061551210.16558-100000@pcnet5.pcnet.com>
	<40C37E1C.4000402@freebsd.org> <20040606204817.GB96607@dhcp50.pn.xcllnt.net>
In-Reply-To: <20040606204817.GB96607@dhcp50.pn.xcllnt.net>
MIME-Version: 1.0
Content-Disposition: inline
Content-Type: text/plain;
  charset="iso-8859-1"
Content-Transfer-Encoding: 7bit
Message-Id: <200406071014.21707.dfr@nlsystems.com>
X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.63
X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on itchy.rabson.org
X-Virus-Scanned: clamd / ClamAV version 0.71, clamav-milter version 0.71
X-Virus-Status: Clean
Subject: Re: HEADS UP! KSE needs more attention
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: Mon, 07 Jun 2004 09:14:29 -0000

On Sunday 06 June 2004 21:48, Marcel Moolenaar wrote:
> On Sun, Jun 06, 2004 at 02:27:08PM -0600, Scott Long wrote:
> > >Doug Rabson also has basic TLS support working in perforce.
> >
> > What platforms?  My understanding was that new binutils and gcc was
> > needed for sparc64 at a minimum.
>
> Yes. It's i386 only and not even close to being complete. In fact,
> there has been discussions that the thread pointer on i386 needs to
> change. Whether that's the case or not, it's likely that TLS will
> complicate matters way too much to for it to ever work in 5.3.

Actually its a bit better than that. It works for most use cases right 
now on i386 but would get confused on dlclose. I'll fix that before I 
move it into current.

As far as the thread pointer issue goes, it turns out that our current 
compiler will always evaluate %gs:0 first which is fine for libpthread. 
I looked at gcc-3.4 sources and it can also be configured to always 
evaluate %gs:0 (this is the default for non-linux platforms).