(Alpha and I64 only.) The Call Special Procedure routine performs
    a call to a procedure that may be either in native code or in a
    translated image.

    Format

      OTS$CALL_PROC  target-func-value ,target-sig-info

                     ,standard-args ,...

1 - Returns

    None.

2 - Arguments

 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).

3 - Description

    When translated code support is requested, the compiled code
    must call the special service routine, OTS$CALL_PROC. The actual
    parameters to the target function are passed to OTS$CALL_PROC as
    though the target routine is native code that is being invoked
    directly.

    OTS$CALL_PROC first determines whether the target routine is part
    of a translated image.

    If the target is in native code, then OTS$CALL_PROC completes
    the call in a way that makes its mediation transparent (that is,
    control need not pass back through it for the return). The native
    parameters are used without modification.

    If the target is in translated code, then OTS$CALL_PROC passes
    control to the Translated Image Environment (TIE).

4 - Condition Values Returned

    None.