John Ticic wrote:
z/OS 1.7 and the Z9 provide a wild branch value ('branch from' in the
SDWA). Does anyone know if this will be available for any previous z/OS.
If it had been in their plan, I think IBM would have added SDWABEA to
z/OS 1.6 long before now.
A somewhat related question. When branch tracing is turned on (system
trace), are any of the relative branch instructions traced. The POPs seems
to indicate that relative instructions aren't traced.
Based branches aren't traced either. What you get are subroutine calls
made via BALR, BASR, BASSM, etc. Unfortunately, you also get mode
switches to/from 64-bit mode. (IMHO it was a poor design choice to not
separate the two.) You'd better have whopping big trace tables because,
with branch tracing enabled, RSM will "chew" up a significant portion of
it with all of their mode switching to/from 64-bit mode. A complete
64-bit RSM implementation will eventually do away with that craziness.
--
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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