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>. > > Jim Mulder z/OS System Test IBM Corp. Poughkeepsie, NY > -- John McKown Maranatha! <>< ---------------------------------------------------------------------- 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
