Page 75 - slides.dvi
P. 75

•
               •
                                         •
                             –
   Operating
                                               Sharing
                      assign
                                                                                                               Sharing
                                    process
               process
                             want
                                         wasteful
   Systems
   —
                      each
                                         (and
                                               segments:
                                    segment
               segment
                             canonical
   Segmentation
                                                                                               Tables
                      segment
                                                                                                               Segments
                                                                                                  Segment
                                                                           B
                                                                                          A
                                                                                                    Per-process
               table
                                    table
                      a
                                                           [DANGEROUS]
                                         dangerous)
                             version
                                         to
               maps
                                               dangerously
                             of
                      unique
                                               (lhs)
               from
                                         store
               a
                             segment
                      System
                                               and
                                                                         Shared
                             info
                                         common
               Process
                                               safely
                                                                                                    Physical Memory
                      Segment
                                               (rhs)


               Segment
                                         information
                                                                                           Table
                      Number
                                                                                                System
                                                                                             Segment
                                         on
                                                          [SAFE]
               Number
                      (SSN)
                                                                                          A
                                                                           B
                                         shared
               (PSN)

               to

                                         segment

                                         in
               SSN



                                         each
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