On 4/12/2011 10:15 AM, Tony Harminc wrote:
On 12 April 2011 12:50, Tom Marchant<m42tom-ibmm...@yahoo.com> wrote:
"When you issue a PR, the system automatically deactivates all
ESTAE-type recovery routines that were previously activated under
that current linkage stack entry."
How does the system know that you issued the PR? Certainly not every
PR can come to the attention of system code; PR is an instruction that
does not normally cause an interrupt and give the system the chance to
examine things. So is the inactivation only discovered when it's
needed?
The system turns on the unstack-suppression bit in the LSED. This causes a
stack-operation exception to be recognized during the unstacking process.
--
Edward E Jaffe
Phoenix Software International, Inc
831 Parkview Drive North
El Segundo, CA 90245
310-338-0400 x318
edja...@phoenixsoftware.com
http://www.phoenixsoftware.com/
