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Article #317Re: Authorizing Address Space
From: Edward E. Jaffe
Date: Mon, 05 Sep 2005 16:51
Date: Mon, 05 Sep 2005 16:51
24 lines
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2876 bytes
Binyamin Dissen wrote: >If running as an SVC/PC, why? > > Why what? Make the other TCBs non-dispatchable? Of course, it depends on what you're doing. But, many authorized activities affect the entire address space. For example, setting/resetting bits in the JSCB (e.g., JSCBPASS), setting/resetting AX values, etc. Such changes in the address space should not be exposed to code that might be running in unauthorized TCBs. Managing the dispatchability of unauthorized TCBs is key to maintaining MVS integrity in such an environment. This is precisely what TSO/E does any time you run a program or command on the authorized "leg" of the TMP. (See bit TCBAREQ in TCBNDSP3.) -- .-----------------------------------------------------------------. | Edward E. Jaffe | | | Mgr, Research & Development | edjaffe@phoenixsoftware.com | | Phoenix Software International | Tel: (310) 338-0400 x318 | | 5200 W Century Blvd, Suite 800 | Fax: (310) 338-0801 | | Los Angeles, CA 90045 | http://www.phoenixsoftware.com | '-----------------------------------------------------------------'
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From: "Edward E. Jaffe" <edjaffe@phoenixsoftware.com>
Newsgroups: bit.listserv.asm370
Subject: Re: Authorizing Address Space
Date: Mon, 5 Sep 2005 12:51:09 -0400
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