Messages in this thread | | | Date | Wed, 9 Oct 2013 11:53:57 +0100 | From | Will Deacon <> | Subject | Re: SDIV / UDIV Question |
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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
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