From mint-bounce@lists.fishpool.fi Mon Jan 30 18:49:01 2006 X-Original-To: fnaumann@mail.boerde.de Delivered-To: fnaumann@mail.boerde.de X-ME-UUID: 20060130174410470.72E04700009D@mwinf1412.wanadoo.fr Date: Mon, 30 Jan 2006 18:44:09 +0100 From: Patrice Mandin To: Mint list Subject: Re: [MiNT] modules hang 1.16.1 kernel Message-Id: <20060130184409.2bfa620d.mandin.patrice@wanadoo.fr> In-Reply-To: <1138567981.6920.47.camel@joy.home> References: <000101c6250b$febb6600$0480a8c0@in.systinet.com> <1138567981.6920.47.camel@joy.home> Organization: Chez moi X-Mailer: Sylpheed version 1.0.4 (GTK+ 1.2.10; i386-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-15 X-ecartis-version: Ecartis v1.0.0 Sender: mint-bounce@lists.fishpool.fi Errors-To: mint-bounce@lists.fishpool.fi X-original-sender: mandin.patrice@wanadoo.fr Precedence: bulk List-help: List-unsubscribe: List-Id: X-List-ID: X-Virus-Scanned: by amavisd-new at relay.boerde.de X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on relay.boerde.de X-Spam-Status: No, hits=2.2 tagged_above=-50.5 required=7.0 tests=AWL, BAYES_00, RCVD_IN_SORBS X-Spam-Level: ** Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by wh58-508.st.uni-magdeburg.de id k0UHn1bA014735 Le Sun, 29 Jan 2006 21:53:01 +0100 Petr Stehlik a écrit: > > IMHO this is actually a bug in our binutils adaptation. When I save > > only the d4 it is enough to get FreeMiNT running. And it is caused > > by this the following binutils-2.13.2.1-mint.patch (from the RPM): > > If saving d4 fixes loading of FreeMiNT modules then I suppose the > original code saved d0-d3 only. The question is why didn't it save all > (d0-a6) registers? Are we short of space on stack? > > Is there a rule for module authors to not use the d4-d7 registers > without saving and restoring them? Even if it was I would still think > that the OS should always try to protect itself and save all registers > it needs for its own run before executing external programs. According to compendium, all functions in a xdd/xfs can use d2-d7/a2-a6 provided they are backup/restored, and d0-d1/a0-a1 as scratch registers. But, it does not say which registers can be used/must be saved in the initialization function, if any. And this init function is used by most drivers. -- Patrice Mandin WWW: http://pmandin.atari.org/ Programmeur Linux, Atari Spécialité: Développement, jeux