target-func-value

    OpenVMS usage:function value
    type:         quadword address
    access:       read only
    mechanism:     by value in register R23 (Alpha). by value in
                  register R17 (I64).
    Function value for the procedure to be called.

 target-sig-info

    OpenVMS usage:TIE signature information
    type:          TIE signature block
    access:       read only
    mechanism:     by reference in register R24 (Alpha). by value in
                  register R17 (I64).
    Signature information is used to transform the standard arguments
    into the form required by a translated image (if needed). The
    representation of signature information is described in the
    OpenVMS Calling Standard.

 standard-args

    type:
    access:
    mechanism:    0
    Zero or more arguments to be passed to the called routine, passed
    using standard conventions (including the AI register).