Lecture 8, part 1, 2, 3

NOTE: Not relevant for the exam.

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Exam

Details of processes and binaries in Unix, VM basics, process start

Important questions:

• What are the sections of an ELF executable, what is stored in each section?
• What are the tasks of compiler, assembler, linker, loader?
• What is symbol resolution, which tool performs this task?
• Why is virtual memory useful?
  • How does the translation from virtual to physical addresses work?
  • What is a typical virtual memory layout of a Unix process and how is this related to ELF executable sections?
• What is a shared library and why is it useful?
  • Can you give differences between linker and (dynamic) loader?
• How are Unix processes created?
  • Can you describe the effects on physical and virtual memory spaces?
  • How do fork and exec interact?
• You do not need to know exact details of process creation (init, libc start etc.)