From owner-freebsd-amd64@FreeBSD.ORG Sat Jul 9 14:26:41 2005 Return-Path: X-Original-To: freebsd-amd64@freebsd.org Delivered-To: freebsd-amd64@freebsd.org Received: from [127.0.0.1] (localhost [127.0.0.1]) by hub.freebsd.org (Postfix) with ESMTP id 9A9BC16A41C; Sat, 9 Jul 2005 14:26:40 +0000 (GMT) (envelope-from davidxu@freebsd.org) Message-ID: <42CFDE9F.9050202@freebsd.org> Date: Sat, 09 Jul 2005 22:26:39 +0800 From: David Xu User-Agent: Mozilla/5.0 (X11; U; FreeBSD amd64; en-US; rv:1.7.8) Gecko/20050605 X-Accept-Language: en-us, en MIME-Version: 1.0 To: Joseph Koshy References: <84dead720507082349d02ece0@mail.gmail.com> In-Reply-To: <84dead720507082349d02ece0@mail.gmail.com> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Cc: freebsd-amd64@freebsd.org Subject: Re: [patch] restrict amd64_set_{f,g}sbase() to values inside user VA X-BeenThere: freebsd-amd64@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Porting FreeBSD to the AMD64 platform List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 09 Jul 2005 14:26:41 -0000 I had already post similar patch some days ago to re@ David Xu Joseph Koshy wrote: >Does anyone have objections to the following patch? > >It restricts the values that can be loaded into the FS.base and >GS.base MSRs for user processes to those inside of user VA >(0..(1<<47) today). > >These values are used as the base addresses for FS- and GS- >relative addressing, when a FS: or GS: segment override >is specified in an instruction. > >