The short answer to your question is No. I think you have a fundamental misunderstanding of the operation of the Linkage Stack mechanism.
You should carefully read "Chapter 2. Linkage stack" within IBM publication SA23-1394-00 "z/OS MVS Programming: Extended Addressability Guide" (this is the z/OS 2.1 version, but nothing of great significance has changed in this area for quite some time). The Modifiable Area of a Linkage Stack frame is typically intended to be used in association with ARR's. For some relevant discussion, look at "Chapter 18. Providing recovery" within IBM publication SA23-1371-02 "z/OS MVS Programming: Authorized Assembler Services Guide Version 2 Release 1" With respect to the z/Architecture perspective on the Modifiable Area of a Linkage Stack frame, read subtopic "Adding and Retrieving Information" within major topic "Linkage-Stack Introduction" within IBM publication SA22-7832-11 "z/Architecture Principles of Operation". Here is the text extracted from that subtopic: + Adding and Retrieving Information + + The instruction MODIFY STACKED STATE can be used by a program to + place two words of information, contained in a designated + general-register pair, in an area, called the modifiable area, of + the current linkage-stack state entry (a branch state entry or a + program-call state entry). This is intended to allow a called + program to establish a recovery routine that will be given control + by the control program, if necessary. Bob
