Get OSmosis State from Linux using `/proc`

[sid-agrawal]

Get the OSmosis state from Linux for the memory resource.

To start, we can look at pagemap to get VA-->PA mapping and /proc/PID/pmap to extract memory related states This is linked to #25.

Subtasks:

• [] Run a Linux image that we compiled and run it with out VMM
• [] Figure out a way for the VM to communicate with the VMM
  • [] Shared memory
  • [] hypercall

[sid-agrawal]

If we can get a trivial VM booted which is just a guest image. Try getting some state from there.

[sid-agrawal]

Let's see what all is available under /proc and see:

• how much of the model we can build from that
• How it compares to the model in CellulOS
• [Read] https://docs.kernel.org/filesystems/proc.html
• [Read] https://echorand.me/posts/linux-system-mining/

[sid-agrawal]

Looks like /proc/pid/smaps has info about Protection Keys (i.e., MPK)

• https://man7.org/linux/man-pages/man5/proc_pid_smaps.5.html