[Info-vax] XPERR analysis

[GerMarsh]

We've had some weird bugchecks since installing new CPUs on a VAX.
(VMS V7.1!). The system only stays up for a few days at the most so
we've removed the new CPU.

There's one particular shadowset implicated but I cannot see any way
of obtaining more info from the crash dump as I could with RWAST
processes or INVEXCEPTION crashes.

(Different images and processes but always concerning the particular
shadowset. The crashes only started since installing the new processor
but it didn't crash at all for a few weeks.)

The crashing instruction is PUSHL R2 which doesn't seem very rare to
me.

Any info would be gratefully received.