Questions

1. On an x86 system (a VM is fine), show that while the number of timer interrupts (IRQ 0) remains the same, another periodic system interrupt is actually continually incrementing (hence keeping track of time on a per-CPU basis).
   Hint: use a proc pseudo-file associated with interrupts.
2. keylogger_simple ; native x86 only  [use only for ethical hacking; may not work on a VM]
   (A bit more advanced) Write a simple keyboard logger driver using the "misc" kernel framework. Trap it inside the i8042's IRQ 1 in order to "trap" it inside the keyboard press/release and read the key scancode. Use a kfifo data structure to hold the keyboard scancode in kernel space memory. Have a user mode process (or thread) periodically read the data items from your driver's kfifo into a user space buffer and write them into a log file. Write an app (or use another thread) to interpret the keyboard keys.
   Tips:
   1. Can you ensure that it runs only...