Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262588AbTIQByU (ORCPT ); Tue, 16 Sep 2003 21:54:20 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262589AbTIQByU (ORCPT ); Tue, 16 Sep 2003 21:54:20 -0400 Received: from holomorphy.com ([66.224.33.161]:32721 "EHLO holomorphy") by vger.kernel.org with ESMTP id S262588AbTIQByT (ORCPT ); Tue, 16 Sep 2003 21:54:19 -0400 Date: Tue, 16 Sep 2003 18:55:27 -0700 From: William Lee Irwin III To: Ben Johnson Cc: "Martin J. Bligh" , Linux Kernel Mailing List Subject: Re: linear vs. logical addresses? how does cpu interpret kernel addrs? Message-ID: <20030917015527.GX4306@holomorphy.com> Mail-Followup-To: William Lee Irwin III , Ben Johnson , "Martin J. Bligh" , Linux Kernel Mailing List References: <20030916154747.A22526@blarg.net> <1562370000.1063759683@[10.10.2.4]> <20030917005446.GW4306@holomorphy.com> <1563260000.1063760286@[10.10.2.4]> <20030916184421.A25733@blarg.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20030916184421.A25733@blarg.net> Organization: The Domain of Holomorphy User-Agent: Mutt/1.5.4i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 989 Lines: 20 On Tue, Sep 16, 2003 at 06:44:21PM -0700, Ben Johnson wrote: > Thank you. I've been reading the first addition. is there a second? > the second chapter has a very good explanation of paging and how linear > addresses are used. logical addresses on the other hand are barely > mentioned. Segmentation is described well, but the translation of > logical into linear addresses is not described. > I've read elsewhere that logical addresses are comprised of a 16-bit > segment selector and a 32-bit offset. I thought pointers were always > exactly 32-bits (on 32-bit intel). where is the 16-bit selector? You might want to look at intel's volume 3. They're kept in dedicated registers separate from the pointers and used implicitly. -- wli - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/