From mboxrd@z Thu Jan 1 00:00:00 1970 Received: with ECARTIS (v1.0.0; list linux-mips); Fri, 30 Sep 2005 20:47:19 +0100 (BST) Received: from alg145.algor.co.uk ([62.254.210.145]:61199 "EHLO dmz.algor.co.uk") by ftp.linux-mips.org with ESMTP id S3465590AbVI3TrB (ORCPT ); Fri, 30 Sep 2005 20:47:01 +0100 Received: from alg158.algor.co.uk ([62.254.210.158] helo=olympia.mips.com) by dmz.algor.co.uk with esmtp (Exim 3.35 #1 (Debian)) id 1ELQoL-0003Jm-00; Fri, 30 Sep 2005 20:44:49 +0100 Received: from olympia.mips.com ([192.168.192.128] helo=boris) by olympia.mips.com with esmtp (Exim 3.36 #1 (Debian)) id 1ELQqC-0002BW-00; Fri, 30 Sep 2005 20:46:44 +0100 From: Dominic Sweetman MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-ID: <17213.38447.42728.297338@mips.com> Date: Fri, 30 Sep 2005 20:46:55 +0100 To: Ralf Baechle Cc: Daniel Jacobowitz , linux-mips@linux-mips.org Subject: Re: RFC: Revise n32 ptrace interface In-Reply-To: <20050930000550.GE3983@linux-mips.org> References: <20050922182601.GA10829@nevyn.them.org> <20050930000550.GE3983@linux-mips.org> X-Mailer: VM 7.17 under 21.4 (patch 15) "Security Through Obscurity" XEmacs Lucid X-MTUK-Scanner: Found to be clean X-MTUK-SpamCheck: not spam (whitelisted), SpamAssassin (score=-4.846, required 4, AWL, BAYES_00) Return-Path: X-Envelope-To: <"|/home/ecartis/ecartis -s linux-mips"> (uid 0) X-Orcpt: rfc822;linux-mips@linux-mips.org Original-Recipient: rfc822;linux-mips@linux-mips.org X-archive-position: 9103 X-ecartis-version: Ecartis v1.0.0 Sender: linux-mips-bounce@linux-mips.org Errors-to: linux-mips-bounce@linux-mips.org X-original-sender: dom@mips.com Precedence: bulk X-list: linux-mips Ralf Baechle (ralf@linux-mips.org) writes: > I quite deliberately did omit DSP support from 64-bit ptrace(2); there > is currently no MIPS64 processor with DSP support that I know of. This is true so far. But assuming that 64-bit processing becomes increasingly interesting (which seems certain) and that some kind of DSP support with extra registers remains attractive (which seems fairly likely)... well, I'd have said that any 64-bit MIPS CPU configured from now on is quite likely to have extra DSP registers. So while "you aren't going to need it" for a while, anyone thinking of doing a non-compatible change to ptrace might want to reserve some space for these registers. -- Dominic