CEERELU — RCB lookup

This routine sets R12 to the address of the RCB when the following conditions are met:

  1. A Language Environment environment is not currently initialized.
  2. Library routine retention has been successfully initialized and a Language Environment environment has been initialized and terminated at least one time with library routine retention in effect.

Syntax

Call CEERELU

Usage Notes:
  1. Upon return, R12 contains the address of the RCB if the above conditions are met; otherwise, R12 contains a zero.
  2. R14 and R15 are used as linkage registers. R0 is destroyed across the call. R13 is not used.
  3. The routine must be entered in AMODE(31).
  4. It must be link edited with its caller. It is not meant to be called from a HLL program.
Parent topic: Member interfaces for initialization