$LOCK_PAGE_INIT creates the necessary psects and issues the
    $LWKSET calls to lock into the working set the code and linkage
    sections that were declared by $LOCKED_PAGE_START and $LOCKED_
    PAGE_END. R0 and R1 are destroyed by this macro.

    The psects locked by this macro are $LOCK_PAGE_2 and $LOCK_
    LINKAGE_2. If code sections in other modules, written in other
    languages, use these psects, they will be locked by an invocation
    of this macro in a VAX MACRO module.