what is xv6?

https://github.com/mit-pdos/xv6-public

xv6 is a re-implementation of Dennis Ritchie's and Ken Thompson's Unix Version 6 (v6). xv6 loosely follows the structure and style of v6, but is implemented for a modern x86-based multiprocessor using ANSI C.

project setup

Adding a system call

Getting familiar with the xv6 kernel and understanding how system call works

Reference

• https://faceyourfear.tistory.com/m/28
• https://gist.github.com/bridgesign/e932115f1d58c7e763e6e443500c6561
• https://github.com/remzi-arpacidusseau/ostep-projects/blob/master/initial-xv6/background.md
• https://www.youtube.com/watch?v=vR6z2QGcoo8