From owner-freebsd-threads@FreeBSD.ORG  Mon Mar 29 11:39:40 2004
Return-Path: <owner-freebsd-threads@FreeBSD.ORG>
Delivered-To: freebsd-threads@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id A0A5016A4CE
	for <freebsd-threads@freebsd.org>;
	Mon, 29 Mar 2004 11:39:40 -0800 (PST)
Received: from ns1.xcllnt.net (209-128-86-226.bayarea.net [209.128.86.226])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 694A043D1D
	for <freebsd-threads@freebsd.org>;
	Mon, 29 Mar 2004 11:39:40 -0800 (PST)
	(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 i2TJde4Z052389;
	Mon, 29 Mar 2004 11:39:40 -0800 (PST)
	(envelope-from marcel@ns1.xcllnt.net)
Received: (from marcel@localhost)
	by ns1.xcllnt.net (8.12.11/8.12.11/Submit) id i2TJdesW052388;
	Mon, 29 Mar 2004 11:39:40 -0800 (PST)
	(envelope-from marcel)
Date: Mon, 29 Mar 2004 11:39:40 -0800
From: Marcel Moolenaar <marcel@xcllnt.net>
To: Doug Rabson <dfr@nlsystems.com>
Message-ID: <20040329193940.GA52335@ns1.xcllnt.net>
References: <200403292000.13794.dfr@nlsystems.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <200403292000.13794.dfr@nlsystems.com>
User-Agent: Mutt/1.5.5.1i
cc: freebsd-threads@freebsd.org
Subject: Re: Thread Local Storage
X-BeenThere: freebsd-threads@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: Threading on FreeBSD <freebsd-threads.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-threads>,
	<mailto:freebsd-threads-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-threads>
List-Post: <mailto:freebsd-threads@freebsd.org>
List-Help: <mailto:freebsd-threads-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-threads>,
	<mailto:freebsd-threads-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Mon, 29 Mar 2004 19:39:40 -0000

On Mon, Mar 29, 2004 at 08:00:13PM +0100, Doug Rabson wrote:
> 
> I've also been looking at libpthread and I can see some potential 
> problems with it. Currently libpthread on i386 uses %gs to point at a 
> struct kcb which seems to be a per-kse structure. This structure 
> contains a pointer to a per-thread struct tcb and this pointer is 
> managed by the userland context switch code. Other arches are similar, 
> e.g. ia64 uses $tp to point at struct kcb.

On ia64, TP points to struct ia64_tp, which is the TLS.

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