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Welcome to the Hux kernel wiki!

Developing A Toy OS Kernel From Scratch

I will document the whole development process of Hux plus everything I reckon important here. This wiki essentially serves as a tutorial on how to develop one's own toy OS kernel from scratch. I will try to keep a balance between theory and practice (implementation), and explain all the important details in a clear way.

If there are any typos/mistakes/errors, please raise an issue!

Table of Contents

• 01. Prerequisite Readings
• Bare Bones
  • 02. The Very First Skeleton
  • 03. VGA Text Mode Display
  • 04. Formatted Printing
• Meaty Skeleton
  • 05. Debugging & Testing
  • 06. Global Descriptor Table
  • 07. Handling Interrupts
  • 08. External Device Support
• Virtualizing the Memory (Paging, Heap Memory)
  • 09. Intro to Virtual Memory
  • 10. Two-Level Paging Setup
  • 11. Heap Memory Allocator
  • 12. Aligned SLAB Allocators
• Virtualizing the CPU (User Processes, Scheduling)
  • 13. Abstraction of Process
  • 14. User Mode Execution
  • 15. System Calls API Setup
  • 16. Essential System Calls
  • 17. Time-Sharing Scheduler
• Persistence (Hard Disk Driver, File System)
  • 18. IDE Hard Disk Driver
  • 19. File System Interface
  • 20. FS Data Structures
  • 21. FS Internal Operations
  • 22. File-Related Syscalls
  • 23. Page Cache Implementation?
  • 24. Journaling for Consistency?
  • ...
• Concurrency (Multi-Threading, Synchronization)
  • 30. Adopting Mutex Locks
  • 31. Introducing Threads?
  • ...

You will need basic operating systems knowledge before reading these dev documents. The OSTEP book is a good resource (and is probably a must). Also check out my structured reading note of the book.

Enjoy! 😁