twinone/so2

so2

Linux-like operating system.

Built for Operating Systems 2 class at UPC.

This course is by far the most fun of all I've done at UPC (and I'm doing Computation). It's not the easiest but it's amazing to see your own operating system come together little by little, and create a "functional" OS starting from something that just executes a C function.

Features (what we implemented)

• interrupts
  • keyboard
  • clock
  • software interrupts
  • syscalls
• fast syscalls (sysenter/sysexit)
• multi-processing
  • task switch
  • fork
  • clone
• synchronization
  • semaphores (init/wait/signal/destroy)
  • yield
• dynamic memory management
  • sbrk

Copying instructions

• Every year there are different restrictions to the project. Ours were:
  • No inline assembly code
  • Syscalls have to be implemented with the sysenter/sysexit instruction pair (no interrupts)

It's ok to get some inspiration from this repository (you can even tell your teacher), but don't just copy paste or you'll have a very hard time at the exam.

LICENSE

The changes we made to the operating system base are released hereby to the public domain, which means you can do anything you like with it, including selling it, or claiming it as your work.

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Thanks to Juan José Costa for making this course really amazing and for his patience with my bad jokes in class.