키워드

Virtual Memory

User mode vs. Kernel mode

Process

• Process Environment block (PEB)
• Process identifier (PID)

Register vs. Memory

User Stack

x86_64 calling convention

argument vector

Executable Linkable Format (ELF) & loader

system call (syscall)

!!CAUTION!! some system call’s semantic may differ from POSIX standards

• filesys related
  • open, close, create, read, write, seek, tell, ...
• process related
  • halt, exit, exec, fork, wait ...

TSS

file descriptor

• file descriptor table
• dup2 syscall