{
{   The purpose of this request is to execute ring 1 code for MMP$INITIATE_SHADOWING.
{   Segment attributes are updated to transform that segment into an ACTIVE (shadow)
{   segment.
{
{       MMP$INITIATE_SHADOWING_R1 (SEGMENT_POINTER, SEGMENT_LENGTH, STATUS);
{
{ SEGMENT_POINTER: (input) This parameter specifies the process virtual
{       address assigned to the segment.
{
{ SEGMENT_LENGTH: (input) This parameter specifies the segment length
{       for the segment that is to be shadowed.
{
{ STATUS: (output) This parameter specifies the request status.
{

