> IBM Mainframe Discussion List <IBM-MAIN@bama.ua.edu> > > On Sat, 2011-11-05 at 14:11 -0400, Jim Mulder wrote: > > > Perhaps the question should be: How do I get my program to run in PSW > > > key 9? Other than the normal, privileged, SKPA instruction. Is the > > > appropriate bit in CR3 (PKM portion) set to allow SPKA to set to key 9 > > > by a problem state program? Doesn't appear to be. And I don't see a way > > > to set the PKM in a normal, problem state, APF program. I thought > > > MODESET might, but it doesn't. I guess that CICS does it via their magic > > > SVC. > > > > What were you looking at to determine that "Doesn't appear to be"? > > I'm at home and not handy to do a test on z/OS at work right now. I > tried to find this out by perusing the manuals, doing searches on PKM. > But didn't find anything that said was the default PKM in z/OS was. I > don't know if it is not documented, or I just did a poor scan. My usual > philosophy on z/OS is "if it isn't documented, then it is unknown and > liable to change without notice". Well, maybe an APAR's doc would > mention such a change. But I rarely depend on "test and see if it works > or not" because I've done that in the past and then it went and changed > on me. > > > > > In most cases, when a task is attached, the PKM in CR3 > > has the bits set to allow a problem-state program to do an SPKA > > to the task's key (the key in TCBPKF), and key 9. > > Thanks. But "in most cases" leaves open the possibility that some times > the PKM isn't set. Again, I don't know where the doc for this is. I may > just not have found it. I tried reading a number of the manuals on z/OS > 1.13 in areas that I thought were appropriate. > > Reading IBM manuals for too long causes brain damage <grin>. Not as > quickly as reading MS stuff. That's why GNU doesn't __do__ > documentation. <big grin>.
Let me reword that to say "in the environments where problem state application code would be running" instead of "in most cases". The documentation is under the KEY and PKM parameter descriptions on the ATTACHX macro in Authorized Assembler Services Reference. Jim Mulder z/OS System Test IBM Corp. Poughkeepsie, NY ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
