In <1309697614.9025.31.ca...@dv7t.johnmckown.net>, on 07/03/2011
   at 07:53 AM, John McKown <joa...@swbell.net> said:

>As I recall, you have a program running on a PRB. It issues a LINK
>which runs on a SVRB (as do all type 3 and 4 SVCs). The LINK runs the
>requested program on a PRB. If you abend in the second, the dump will
>show the TCB (TCBRBP) pointing to the second PRB which points
>(RBLINKB) to the SVRB which points to the first PRB which points back
>to the TCB.

That's closer, but when SVC 6 creates the new PRB it does not push it
on the stack, but rather inserts it below the SVRB, so that EXIT
processing for the SVRB will make the PRB current.
 
-- 
     Shmuel (Seymour J.) Metz, SysProg and JOAT
     ISO position; see <http://patriot.net/~shmuel/resume/brief.html> 
We don't care. We don't have to care, we're Congress.
(S877: The Shut up and Eat Your spam act of 2003)

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