On Thu, 5 Sep 2019 04:54:02 +0000, Jon Perryman wrote: >>SVC allows you to execute authorized code in YOUR address space.
I should have said "SVC invokes a system service that runs in Supervisor state in your address space." >>It does not allow you to execute code in any arbitrary address space. > >There is no YOUR address space. Really? Your address space is the address space in which your program is running. >E.g. Getmain belongs to RSM but run authorized in any address >space that uses the getmain macro. ITYM VSM. And GETMAIN does not "run authorized", but it invokes a system service that runs in Supervisor state. It isn't the same thing. -- Tom Marchant ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN