I was referring to CP routines calling other CP routines. It's true
that the CC also had to be set correctly when redispatching the code
running in a virtual machine after intercepting a privileged operation.
On 2020-06-02 10:54 p.m., Paul Gilmartin wrote (snipped):
On 2020-06-02, at 19:37:25, Gary Weinhold wrote:
I recall that VM/370 CP routines set CC before returning to the caller;
I don't have access to the source anymore (for the last 30 years or so)
to verify this and what technique was used. I just remember thinking it
was different and clever (coming from a VS1/MVS background).
I'd guess stuffing it in the Old PSW before LPSW returns to caller.
Gary Weinhold
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