Yep - from the SMFEWTM documentation in the "SMF" manual :

"MODE=XMEM  specifies that the caller is entered in cross-memory mode (the 
primary address space is not the home address space). 
The caller must be in primary ASC mode. If you specify MODE=XMEM, you must 
specify BRANCH=YES and WRKAREA."

Rob Scott
Lead Developer
Rocket Software
275 Grove Street * Newton, MA 02466-2272 * USA
Tel: +1.617.614.2305
Email: rsc...@rs.com
Web: www.rocketsoftware.com 


-----Original Message-----
From: IBM Mainframe Discussion List [mailto:ibm-m...@bama.ua.edu] On Behalf Of 
Charles Mills
Sent: 22 September 2010 17:02
To: IBM-MAIN@bama.ua.edu
Subject: Re: IEFU85

> Note that the caller *must* be in primary ASC mode

Is that requirement documented?

Charles

-----Original Message-----
From: IBM Mainframe Discussion List [mailto:ibm-m...@bama.ua.edu] On Behalf
Of John P. Baker
Sent: Wednesday, September 22, 2010 7:10 AM
To: IBM-MAIN@bama.ua.edu
Subject: Re: IEFU85

Rob,

Ok.  That makes sense.

However, I think that in a abundance of caution I should load all access
registers with an ALET of zero (0), other than where I am accessing storage
in another address space.

John P. Baker

-----Original Message-----
From: IBM Mainframe Discussion List [mailto:ibm-m...@bama.ua.edu] On Behalf
Of Rob Scott
Sent: Wednesday, September 22, 2010 9:57 AM
To: IBM-MAIN@bama.ua.edu
Subject: Re: IEFU85

IEFU85 is invoked when SMFEWTM is invoked with the BRANCH=YES and XMEM=YES
operands.

Note that the caller *must* be in primary ASC mode - so all items referenced
by the IEFU85 exit parameter list will be in the PASN so you do not need any
ALETs to access them.

One very clear and useful (to me) usage of SMFEWTM with BRANCH=YES and
XMEM=YES would be when you want to write an SMF record from a PC-ss routine.

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