On 2020-11-16, at 17:47:10, Dan Greiner wrote: > ... > So, the facility only applies to virtual addresses on newer models. As I > recall, the development of this facility was requested by z/Linux in order to > help avoid classic stack-overflow exposures; but, it obviously has > applicability to other environments. (It was also introduced in order to > "keep up with the Joneses — er ... I mean the Intels.) > Conversely, there's REFRPROT to prevent storing into programs marked REFR. Dismayingly, I believe REFRPROT is global and intrduces incompatibility with "dusty deck" programs erroneously marked REFR.
-- gil
