The address space initialization routine

The initialization routine is a program that you can write to set up certain services or data areas for the new address space. It executes in the new address space before the procedure identified by SYS1.PROCLIB. Each initialization routine initializes an address space according to unique requirements of the address space. For example, the initialization routine might:

Create and initialize control blocks
Load executable code
Build the cross memory linkages to allow programs in other address spaces to call PC routines in the new address space.

The AXLIST, TKLIST, and LXLIST parameters on ASCRE set up cross memory linkages that allow programs in the new address space to be cross memory users, but not cross memory service providers. The initialization routine is a good place to use the cross memory macros that allow PC routines in the new address space to be invoked from other address spaces.

The address space that ASCRE is to create might not need initializing beyond what the macro provides. In this case, specify the dummy routine IEFBR14 on the INIT parameter and ignore the following description of the initialization routine.