Hi Will ,
Oh , I see , Thanks for your clarification ! So R-class cores will not run linux ? This means we don't need care about this . Am I right ? Thank you . -----Original Message----- From: Will Deacon [mailto:will.dea...@arm.com] Sent: Wednesday, October 09, 2013 6:54 PM To: Wang, Yalin Cc: 'linux-arm-msm-ow...@vger.kernel.org'; linux-kernel@vger.kernel.org Subject: Re: SDIV / UDIV Question On Wed, Oct 09, 2013 at 08:08:05AM +0100, Wang, Yalin wrote: > I have a question about sdiv/ udiv instructions : > In armv7 A/R TRM, it said sdiv/udiv will cause Divide by zero as > undefined exception or just return zero (decided by implementation) . > > So in kernel , should we need register a undef hook to Get this > undef exception and send SIGFPE to user space Process ? As far as I can see, this can only happen for R-class cores, based on SCTLR.DZ. Will -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
