From mboxrd@z Thu Jan 1 00:00:00 1970 Received: with ECARTIS (v1.0.0; list linux-mips); Tue, 11 Sep 2012 03:04:48 +0200 (CEST) Received: from gateway09.websitewelcome.com ([67.18.39.12]:50216 "EHLO gateway09.websitewelcome.com" rhost-flags-OK-OK-OK-OK) by eddie.linux-mips.org with ESMTP id S1903487Ab2IKBEo (ORCPT ); Tue, 11 Sep 2012 03:04:44 +0200 Received: by gateway09.websitewelcome.com (Postfix, from userid 507) id 8EEC9D6ECAB5; Mon, 10 Sep 2012 20:04:41 -0500 (CDT) Received: from gator750.hostgator.com (gator750.hostgator.com [174.132.194.2]) by gateway09.websitewelcome.com (Postfix) with ESMTP id 81F26D6ECA94 for ; Mon, 10 Sep 2012 20:04:41 -0500 (CDT) Received: from [216.239.45.4] (port=7415 helo=kkissell.mtv.corp.google.com) by gator750.hostgator.com with esmtpa (Exim 4.77) (envelope-from ) id 1TBEu9-0002Oh-6l for linux-mips@linux-mips.org; Mon, 10 Sep 2012 20:04:41 -0500 Message-ID: <504E8E27.5030904@paralogos.com> Date: Mon, 10 Sep 2012 18:04:39 -0700 From: "Kevin D. Kissell" User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:15.0) Gecko/20120827 Thunderbird/15.0 MIME-Version: 1.0 To: linux-mips@linux-mips.org Subject: Re: Is r25 saved across syscalls? References: <20120909193008.GA15157@brightrain.aerifal.cx> <20120910170830.GB24448@linux-mips.org> <20120910172248.GN27715@brightrain.aerifal.cx> In-Reply-To: X-Enigmail-Version: 1.4.4 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - gator750.hostgator.com X-AntiAbuse: Original Domain - linux-mips.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - paralogos.com X-BWhitelist: no X-Source: X-Source-Args: X-Source-Dir: X-Source-Sender: (kkissell.mtv.corp.google.com) [216.239.45.4]:7415 X-Source-Auth: kevink@kevink.net X-Email-Count: 1 X-Source-Cap: a2tpc3NlbGw7a2tpc3NlbGw7Z2F0b3I3NTAuaG9zdGdhdG9yLmNvbQ== X-archive-position: 34460 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: kevink@paralogos.com Precedence: bulk List-help: List-unsubscribe: List-software: Ecartis version 1.0.0 List-Id: linux-mips X-List-ID: linux-mips List-subscribe: List-owner: List-post: List-archive: X-list: linux-mips Return-Path: On 09/10/2012 05:29 PM, Maciej W. Rozycki wrote: > I do wonder however why we have these instructions to save/restore $25 > in SAVE_SOME/RESTORE_SOME. This dates back to 2.4 at the very least. > Ralf, any insights? Hi, guys. Maybe the fact that it's used for dispatching PIC calls has something to do with it? /K.