{
{  dup$find_procedure_for_pva locates the procedure which contatins the
{  specified pva.  This can be determined by the symbol table address
{  and the symbol index returned to the caller.
{
{  DUP$FIND_PROCEDURE_FOR_PVA (MODULE, SECTION_INDEX, PVA, SYMBOL,
{      SYMBOL_INDEX, STATUS)
{
{  MODULE : (input)     is the module address table item in which the
{                       pva is located.
{
{  SECTION_INDEX : (input)  is the index of the section definition record
{                       within the array of section definition records
{                       containing the pva.
{
{  PVA : (input)        is the pva for which the symbol table is to be
{                       searched.
{
{  SYMBOL : (output)    is the pointer to the debug symbol table entry.
{
{  SYMBOL_INDEX : (output)  is the index of the symbol table entry.
{
{  STATUS : (output)    is the status of the request. Possible value(s):
{                         due$no_symbol_table_in_module
{                         due$pva_not_in_known_proc
{
