As the extended discussion has shown, we can discuss forever what the terms
truly mean but it likely proves fruitful only to discuss what the system
does based on what the user has specified (by such things as RENT and REFR
binder options or by asking the assembler for reentrancy checks).

Assembler reentrancy appears to equate to "does not modify itself". That is
not the same necessarily as "is reentrant" but who cares?

Binder RENT for the most part equates to the system allowing multiple
LINKers or LOADers (or whatever) to share a copy. Does it mean that the
single copy actually is reentrant? No, of course not.

I recollect that binder REFR has no effect whatsoever but that some folks
have thoughts about doing something based on REFR.

And the requirement on LPA modules is simply that they must be prepared to
be restored to their "original state" at any time.

Peter Relson
z/OS Core Technology Design
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