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From: laj@wnuxb.UUCP (JOHNSON)
Newsgroups: net.unix
Subject: Re: obscure OS/360 programs
Message-ID: <348@wnuxb.UUCP>
Date: Mon, 7-Jan-85 12:57:36 EST
Article-I.D.: wnuxb.348
Posted: Mon Jan  7 12:57:36 1985
Date-Received: Tue, 8-Jan-85 05:42:24 EST
References: <6841@brl-tgr.ARPA>
Reply-To: laj@wnuxb.UUCP (JOHNSON)
Organization: AT&T - Warrenville Data Center, IL
Lines: 4
Summary: 

Back in the days when security was not an issue, we had such a IEFBR15
type program which was installed as an SVC.  By pointing R15 to user
code and then issuing the SVC, one could enter supervisor state.