Van Dalsen, Herbie wrote:
Last one...
I have not checked this for myself yet, and probably won't have the time
in the next few weeks... In theory... If I allocate 200 bytes of storage
at x'7fffff00', and my program, the way some Cobol programs are, writes
1600 bytes there, what would the addresses be, would it jump across the
'hole' or try and write over the hole?
There is also a one-page "hole" at 7FFFF000. (Another handy
implementation choice made by your friendly-neighborhood z/OS developers!)
This provides a way for 31-bit or 64-bit programs to place a "guaranteed
bad" address into an address word or register. You can see this address
peppered throughout the PSA.
--
Edward E Jaffe
Phoenix Software International, Inc
5200 W Century Blvd, Suite 800
Los Angeles, CA 90045
310-338-0400 x318
[EMAIL PROTECTED]
http://www.phoenixsoftware.com/
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