From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from sc8-sf-mx2-b.sourceforge.net ([10.3.1.12] helo=sc8-sf-mx2.sourceforge.net) by sc8-sf-list1.sourceforge.net with esmtp (Exim 4.30) id 1DYOlJ-00026j-DW for user-mode-linux-devel@lists.sourceforge.net; Wed, 18 May 2005 06:39:01 -0700 Received: from lakshmi.addtoit.com ([198.99.130.6] helo=lakshmi.solana.com) by sc8-sf-mx2.sourceforge.net with esmtp (Exim 4.41) id 1DYOlG-0006gz-81 for user-mode-linux-devel@lists.sourceforge.net; Wed, 18 May 2005 06:39:01 -0700 From: Jeff Dike Subject: Re: [uml-devel] Explaination of system call function flow in TT mode Message-ID: <20050518133331.GB3925@ccure.user-mode-linux.org> References: <003e01c503b3$f3e46cb0$ac655e0a@sha.st.com> <200505162324.37749.blaisorblade@yahoo.it> <3524bf1f0505161709476c4940@mail.gmail.com> <200505170217.23138.blaisorblade@yahoo.it> <3524bf1f050517105676c6c051@mail.gmail.com> <20050517220053.GA10144@ccure.user-mode-linux.org> <428B0F2B.3060503@fujitsu-siemens.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <428B0F2B.3060503@fujitsu-siemens.com> Sender: user-mode-linux-devel-admin@lists.sourceforge.net Errors-To: user-mode-linux-devel-admin@lists.sourceforge.net List-Unsubscribe: , List-Id: The user-mode Linux development list List-Post: List-Help: List-Subscribe: , List-Archive: Date: Wed, 18 May 2005 09:33:31 -0400 To: Bodo Stroesser Cc: Young Koh , Blaisorblade , user-mode-linux-devel@lists.sourceforge.net On Wed, May 18, 2005 at 11:47:23AM +0200, Bodo Stroesser wrote: > I also thought about not saving FP-regs on each kernel entry. But if you do > this optimization, you need to save / restore FP-regs on switch_to. Also you > need to get the FP-regs when setting up a signal-handler stackframe. And > they > have to be restored on sys_(rt_)sigreturn from the values found in the > stackframe. True, but these are much less frequent than kernel entries/exits. > I hope, I didn't miss some other places that would need adaption. Offhand, this sounds right. Jeff ------------------------------------------------------- This SF.Net email is sponsored by Oracle Space Sweepstakes Want to be the first software developer in space? Enter now for the Oracle Space Sweepstakes! http://ads.osdn.com/?ad_id=7412&alloc_id=16344&op=click _______________________________________________ User-mode-linux-devel mailing list User-mode-linux-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel