From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Michael S. Zick" Subject: Re: [parisc-linux] Does it lakes some cloberred r1 in Date: Thu, 20 Apr 2006 12:36:37 -0500 Message-ID: <200604201236.37925.mszick@morethan.org> References: <200604201728.k3KHSH7W022804@hiauly1.hia.nrc.ca> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" To: parisc-linux@lists.parisc-linux.org Return-Path: In-Reply-To: <200604201728.k3KHSH7W022804@hiauly1.hia.nrc.ca> List-Id: parisc-linux developers list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: parisc-linux-bounces@lists.parisc-linux.org On Thu April 20 2006 12:28, John David Anglin wrote: > > > (here) insn, an interruption occures which in turn launch the > > > fixup_put_user_skip_1() > > > > A couple more questions for research :) > > > > Q: Does the process of interruption clobber registers? > Joel, The machine should switch a small sub-set of the general registers to an alternate set, called the 'shadow registers' for the interruption routine to use. I do not recall the exact list of which register numbers those are. Search for 'shadow registers' in the acd.pdf I do not know if r1 is shadowed or not. If the interrupt routine needs to use other registers, then it must save/restore them in that routine. Mike > r8 and r9? > > Dave _______________________________________________ parisc-linux mailing list parisc-linux@lists.parisc-linux.org http://lists.parisc-linux.org/mailman/listinfo/parisc-linux