nex_os

Nonica's EXperimental Operating System

Currently WIP.

Run on Docker

Warning

The current configuration takes a long time to build.

docker build -t nex_os .
docker run --rm -it -v $(pwd):/work nex_os ./run.sh

Implemented Features

• Memory
  • Page allocator (bump allocator)
  • SV39 paging
  • Global allocator
• Process
  • User mode process
  • Round-robbin scheduler
  • Context switch (Struct Based)
  • ELF loader
  • Idle process
  • Process states (Running)
  • Process listing (ps)
  • Process creation/yield/exit syscalls
• Trap
  • S-mode Trap Handler
  • SBI console output
• Shell
  • Built-in commands (help, exit, yield, ps, sh)
  • Command history navigation (up/down)
  • Backspace handling and ASCII input validation
• VFS
  • In-memory filesystem (MemoryFs/MemoryNode)
• Timer
  • read_time helpers
• Logging
  • log macros
• Test
  • Basic shell test runner