signal-arguments

    OpenVMS usage:vector_longword_unsigned
    type:         unspecified
    access:       modify
    mechanism:    by reference, array reference

    Signal argument vector. The signal-arguments argument contains
    the address of an array that is this signal argument vector
    stack.

    See the VSI OpenVMS Programming Concepts Manual for a description
    of the signal argument vector.

 mechanism-arguments

    OpenVMS usage:structure
    type:         unspecified
    access:       read only
    mechanism:    by reference

    Mechanism argument vector. The mechanism-arguments argument
    contains the address of a structure that is this mechanism
    argument vector stack.

    See the VSI OpenVMS Programming Concepts Manual for a description
    of the mechanism argument vector.