XV6InterruptSyscall.md

XV6 Source Code Reading -- Interrupt and System Call

Requirement

Code to read

• Bootloader
  • bootasm.S (p.91)
  • bootmain.c (p.92)
• Entering xv6
  • entry.S (p.10)
  • entryother.S (p.11)
  • main.c (p.12)
• System calls (and interrupt)
  • traps.h (p.32)
  • vectors.pl (p.32)
  • trapasm.S (p.33)
  • trap.c (p.33)
  • syscall.h (p.35)
  • syscall.c (p.35)
  • sysproc.c (p.37)

Resources

Instruction

Interrupt

• cli - Clear Interrupt Flag
  • x86 Instruction Set Reference - CLI
  • CLI — Clear Interrupt Flag
• sti - Set Interrupt Flag
  • STI — Set Interrupt Flag
• int
  • INT n/INTO/INT3/INT1 — Call to Interrupt Procedure
  • wiki - INT (x86 instruction)