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Memory management (Some basics (Object Code (object code parts (Header,…

- - - - Header
      - Text segment
      - Data Segment
      - Relocation Info: Tells Where we have relocatable addresses
      - Symbol Table
      - Debuggin Info
  - - - Assembly code
        
        assembler
        
        Object Code
        
        linker
        
        Loader
  - - - relocates the relocatable addresses; basically produces another form of object code
      - Symbol resolution
  - - - Relocation of relocatable adres to absolute adreses
        
        Relocation is inefficient like when a process is swapped. So Done by OS. With OS we call relocatable adres as Logical adres which is generated by CPU
        
        Memory Manager performs the conversion of Logical (Relocatable) to Physical(Absolute) adres
        
        Basic Memory manager parts
        
        Limit register
        
        Advantages
        
        2 more items...
        
        Relocation register
        
        Registers set by OS; so malicious process wont do harm
        
        Logical adres: Our CPU thinks program is on lines like 0,1,2...
      - program loading (takin program from hardisk onto MM)
- - - - Problems:
        
        External fragmentation
        
        Process limited by max size of partition
        
        Internal fragmentation
        
        degree of multi programmin reduced