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

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

The following reply was made to PR port-arm/52603; it has been noted by GNATS.

From: Manuel Bouyer <bouyer%antioche.eu.org@localhost>
To: port-arm-maintainer%NetBSD.org@localhost, gnats-bugs%NetBSD.org@localhost,
        netbsd-bugs%NetBSD.org@localhost
Cc: 
Subject: Re: port-arm/52603: arm(v7?) vfp register corruption
Date: Mon, 9 Oct 2017 22:04:29 +0200

 On Mon, Oct 09, 2017 at 09:07:11PM +0200, Manuel Bouyer wrote:
 > 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.
 
 Some other interesting patterns:
 16: 217.600000 218.700000 217.600000
 
 I can't make much sense of this one
 
 
 0: 100.000000 0.000000 100.000000  
 1: 101.100000 1.100000 101.100000  
 2: 102.200000 2.200000 102.200000  
 3: 103.300000 3.300000 103.300000  
 4: 104.400000 4.400000 104.400000  
 5: 105.500000 5.500000 105.500000  
 6: 106.600000 6.600000 106.600000  
 7: 107.700000 7.700000 107.700000  
 8: 108.800000 8.800000 108.800000  
 9: 109.900000 9.900000 109.900000  
 10: 111.000000 11.000000 111.000000
 11: 112.100000 12.100000 112.100000
 12: 113.200000 13.200000 113.200000
 13: 114.300000 14.300000 114.300000
 14: 115.400000 15.400000 115.400000
 15: 116.500000 16.500000 116.500000
 16: 117.600000 0.000000 117.600000
 17: 118.700000 0.100000 118.700000
 18: 119.800000 19.800000 119.800000
 19: 120.900000 20.900000 120.900000
 20: 122.000000 22.000000 122.000000
 21: 123.100000 23.100000 123.100000
 22: 124.200000 24.200000 124.200000
 23: 125.300000 25.300000 125.300000
 24: 126.400000 26.400000 126.400000
 25: 127.500000 27.500000 127.500000
 26: 128.600000 28.600000 128.600000
 27: 129.700000 29.700000 129.700000
 28: 130.800000 30.800000 130.800000
 29: 131.900000 31.900000 131.900000
 30: 133.000000 33.000000 133.000000
 31: 134.100000 34.100000 134.100000
 
 the whole set of registers is from another process.
 
 -- 
 Manuel Bouyer <bouyer%antioche.eu.org@localhost>
      NetBSD: 26 ans d'experience feront toujours la difference
 --