
{    The purpose of this request is to locate the execution_control_block
{  of a specified task in the active job.
{
{        PMP$FIND_TASK_XCB (TASK_ID, XCB)
{
{  TASK_ID: (input) This parameter specifies the identity of the task whose
{        execution_control_block is to be located.
{
{  XCB: (output) This parameter specifies the location of the identified
{        task's execution_control_block.
{
{       WARNING:  This procedure uses a ring 1 interlock. It must not
{         be called by signal handlers (or their subordinates) which
{         may interrupt ring 1 processes.
{
