GCSSAVI

Purpose

Use the GCSSAVI macro to create a register save area when a branch entry to GETMAIN or FREEMAIN is issued from an exit which was defined for GENIO with EXITBR=YES, or for IUCVCOM with BRANCH=YES.

GCSSAVI allocates space for and returns the address of a register save area.

Parameters

GET

Indicates that you want to allocate space for a 72-byte register save area and return its address.

FREE

Indicates that you want to release the space allocated by the GET option.

Usage

1. Use the GCSSAVI macro only when a branch entry to GETMAIN or FREEMAIN is issued from an exit which was defined for GENIO with EXITBR=YES, or for IUCVCOM with BRANCH=YES.
2. The caller must be disabled for interrupts, in supervisor state, and in key 0.
3. After GCSSAVI GET, you must use GCSSAVI FREE to free the allocated space.
4. Use of the GCSSAVI macro is optional; you may give the address of your own register save area to the branch entries instead.
5. The program issuing the GCSSAVI macro, receives the following information in its registers.

   Register	Contents
   13	The address of the register save area.

Return Codes and ABEND Codes

The GCSSAVI macro generates no return codes or abend codes.