<snip> I could search for the zero bytes using SRST but presumably that would hit the same problem going off the end of a page </snip>
Do not presume anything. Read the POp. Carefully. "May or may not" means exactly what it says. It is allowed to do it and it is allowed not to do it, architecturally. In practice, a given machine will choose one way or the other but even that is not guaranteed. It would architecturally be allowed to do it one way on Mondays and the other way on Tuesdays. If you use SRST with a big enough range you will eventually encounter storage to which you are not authorized to read (unless you are key 0), or storage that is not allocated and will blow up. The x'7FFFF000' page in the address space is intentionally left as one that will always blow up on reference. Peter Relson z/OS Core Technology Design ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
