Linkage directive

    Format

      .LINKAGE_PAIR  name

1  –  Parameter

 name

    The name of the procedure descriptor, possibly defined in a
    different module of the routine to which linkage is required.

2  –  Description

    .LINKAGE_PAIR causes a linkage pair to be stored at the current
    location counter. A linkage pair consists of two quadwords. The
    first quadword is the code entry point of the routine indicated
    by the specified identifier. The second quadword is the address
    of the procedure descriptor of the routine indicated by the
    specified identifier. The second quadword is also called the
    procedure value. The specified name should reference a procedure
    descriptor that is either defined within the assembly unit or
    that becomes defined at the time the program is linked.

3  –  Notes

    o  You can only use this directive within data or mixed psects
       (psects that have either the NOEXE or MIX attributes).

    o  If automatic data alignment is enabled, this directive aligns
       the current location counter to an octaword (128-bit) boundary
       before allocating storage.

4  –  Example

        .LINKAGE_PAIR A     ; Code address A followed by address of
                            ; procedure descriptor A