【2014-11-23】《The Hardware/Software Interface》– Section 8 (continue)

  • Exceptions:
    • An exception is transfer of control to the operating system in response to some event.
    • exception processing by exception handler

  1. Process(进程)
    • Process abstraction provides an interface between the program and the underlying CPU + Memory.
    • Definition: A process is an instance of a running program
    • Process provides each program with two key abstractions:
      • Logical control flow
        • Each process seems to have exclusive use of the CPU
      • Private virtual address space
        • Each process seems to have exclusive use of main memory
  2. Context Switching
    • Processes are managed by a shared chunk of OS code called the kernel
    • Control flow passes from one process to another via a context switch
  3. Creating New Processes & Programs

时间： 2025-01-13 08:24:41

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