How about create a S0C1?

On Mon, Apr 22, 2024 at 7:21 AM Peter Relson <[email protected]> wrote:

> Bernd O wrote
> <snip>
> I'd suggest to be very careful with such codings;
> a co-worker some years ago did this and - by accident - the code ran
> privileged,
> which caused the whole LPAR to hang.
>
> Same goes for ST at address zero, which was suggested by another poster.
> </snip>
>
> I challenge both of those.
>
> The first will never happen unless something changed to key 0 (being
> privileged is relevant only to the extent that you could then change to key
> 0). And that doesn't happen without intent.
>
> The second will never happen outside of the OS itself in the absence of an
> APARable z/OS error (related to what we refer to as low-core protect).
>
> Peter Relson
> z/OS Core Technology Design
>
>
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