And even if you do use an SRB, there is still no guarantee that the results won't be "unpredictable." While the SRB approach protects you from some problems, it still doesn't provide access to any serialization techniques in use by the target address space.
=============================================== Wayne Driscoll OMEGAMON DB2 L3 Support/Development wdrisco(AT)us.ibm.com =============================================== From: Chris Craddock <[email protected]> To: [email protected] Date: 05/10/2010 09:34 PM Subject: Re: Accessing Cross Memory Storage in REXX Sent by: IBM Mainframe Discussion List <[email protected]> On Mon, May 10, 2010 at 4:37 PM, Rick Fochtman <[email protected]> wrote: > -----------------------------<snip>------------------------------------ > > Highly unlikely unless I'm missing something obvious. The only LEGAL way to > access memory in some other address space is via an SRB. You need to be in > sup state and key zero to schedule an SRB and REXX runs key 8 and problem > state. But if we're allowed to cheat then I'll play :-) > > PS> I didn't know there were any mainframe people at Queens... > -------------------------------<unsnip>------------------------------- > Not strictly true, but the mechanisms are NOT for the meek! I've found > other ways but in the interests of safety, I'll not share them. > Notice that I said "Legal". Nothing else is supported by the z/OS software architecture - regardless of whether something else is possible under the hardware architecture. Any grinning idiot with an APF library can study PoPs and contrive ways of gaining addressability to some other address space, but since z/OS doesn't know (or allow!) what you would be doing, the results are most kindly described as "unpredictable". -- This email might be from the artist formerly known as CC (or not) You be the judge. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
