On Mon, 17 Sep 2007 09:33:56 -0500 Vic Petrone <[EMAIL PROTECTED]> wrote:
:>I did some testing and more reading and discovered the following... :>a) The Extended Addressability Guide says that each workunit (TCB or SRB) :>has its own stack. From that I it appears that the IRB is sharing the stack :>with the orginating task. So, I won't be using the stack to save the state in :>the exit. Hence the second question on the size of the save area provided by :>the system for the exit. Why can't you use the stack? The IRB blocks the RBs older than it. :>b) I checked the contents of 4(r13) and 0(r14) upon entry to the ETXR. 4 :>(r13) does not contain F6SA, so I assume it's a standard 72 byte save area; :>and r14 does point to an SVC 3. Sounds reasonable. :>As Binyamin noted, the system requires the ETXR to restore the regs. Since :>the doc is not specific, I'll have to save and restore both GPRs and ARs - just :>to be on the safe side. On the other hand, it may be doc that was true at MVS 3.8 and is no longer required. :>As an FYI... I'm using the ETXR for cleanup and to inform the originating task :>(attaching task) that a child has terminated. There are a varying number of :>child subtasks, so I do cleanup in the ETXR and use a single ECB to post the :>originating task that a child terminated. There is a queue of control blocks :>(one per child) that the originating task can then check to determne which :>child terminated and take appropriate action if necessary. Sounds reasonable. -- Binyamin Dissen <[EMAIL PROTECTED]> http://www.dissensoftware.com Director, Dissen Software, Bar & Grill - Israel Should you use the mailblocks package and expect a response from me, you should preauthorize the dissensoftware.com domain. I very rarely bother responding to challenge/response systems, especially those from irresponsible companies. ---------------------------------------------------------------------- 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
