I think that CA-2 (aka DUO aka DOS Under OS) did this to trap the SVCs issued by a DOS application code and invoke an equivalent OS subroutine. I don't know if this product still exists. We used it back in the 1990s to run a lot of DOS applications which had been running on DOS virtual machines under VM/PE (remember that? From Amdahl) directly on MVS.
-- John McKown Systems Engineer IV IT Administrative Services Group HealthMarkets(r) 9151 Boulevard 26 * N. Richland Hills * TX 76010 (817) 255-3225 phone * [email protected] * www.HealthMarkets.com Confidentiality Notice: This e-mail message may contain confidential or proprietary information. If you are not the intended recipient, please contact the sender by reply e-mail and destroy all copies of the original message. HealthMarkets(r) is the brand name for products underwritten and issued by the insurance subsidiaries of HealthMarkets, Inc. -The Chesapeake Life Insurance Company(r), Mid-West National Life Insurance Company of TennesseeSM and The MEGA Life and Health Insurance Company.SM > -----Original Message----- > From: IBM Mainframe Discussion List > [mailto:[email protected]] On Behalf Of Peter Relson > Sent: Monday, April 25, 2011 6:49 AM > To: [email protected] > Subject: Re: Mixing Auth and Non-Auth Modules > > One point about SVCs vs PC's: unless you go fairly far out of > your way, a > PC routine will not confer additional key/state authorization to its > invoker. An SVC routine easily can do that by manipulating > control block > fields. This conferrence leads directly to many of (or is itself) the > system integrity issue(s) related to a "magic SVC". > > Ed Jaffe mentioned SVC screening > > Curious: Does anyone use SVC screening for its documented intended > purpose: to define those SVCs that a particular task is > allowed to issue > (and conversely those that it is not allowed to issue)? > > Peter Relson > z/OS Core Technology Design > > ---------------------------------------------------------------------- > 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 > > ---------------------------------------------------------------------- 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
