Re: port-arm/52603: arm(v7?) vfp register corruption

[Manuel Bouyer <bouyer%antioche.eu.org@localhost>]

On Mon, Oct 09, 2017 at 08:51:36PM +0200, Manuel Bouyer wrote:
> running
> ./fptest 3
> without opencpn, on an otherwise idle board didn't show corruption after
> 24h. But starting a ping -f against the board caused the corruption to
> show up in less than half an hour.
> 
> So it looks like interrupt activity (other than the CPU ticks) is needed to
> trigger the problem.

Some interresting patterns:
7: 107.700000 0.000000 107.700000
17: 118.700000 117.600000 118.700000
18: 119.800000 1.100000 119.800000

the '17' line looks just as if a previous value of the register from the
same process had been restored

27: 129.700000 129.700000 217.600000

here the wrong value looks like comming from another instance of the
test program.

-- 
Manuel Bouyer <bouyer%antioche.eu.org@localhost>
     NetBSD: 26 ans d'experience feront toujours la difference
--