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KFS

subject

kfs3

  • You must implement a complete, stable and functionnal memory system in your kernel.
  • You must enable memory paging in your kernel
  • You must code a memory structure that handle paging and memory rights
  • You must define kernel and user space
  • You must implement a function to create / get memory pages
  • You must implement kmalloc, kfree, ksize, kbrk for physical memory
  • You must implement vmalloc, vfree, vsize, vbrk for virtual memory
  • You must handle "kernel panics" (print, stop the kernel)

kfs4

  • Create an Interrupts Descriptor Table, fill it and register it
  • Hardware Interrupts
  • Software Interrupts
  • A signal-callback system on your Kernel API
  • An interface to schedule signals
  • Global Panic Fault handling
  • An interface to clean registers before a panic / halt
  • An interface to save the stack before a panic
  • When you’re done with all of that, you’ll have to implement a IDT keyboard handling system.
  • It has not been said, but syscalls are also handled by the IDT. You can’t implement them now (No processus / Execution), but a good start could be coding the base functions for it, it could save you some work.
  • Also, you can add some features to the keyboard handler, for example multi layouts (qwerty, azerty), base functions like get_line (just like read: waits for characters and return them when \n is pressed).

todo

present

  • bring back enable_paging from old x86_64 code
  • bring back setup_page_tables from old x86_64 code and adapt it to 32-bit

future

  • find project name and rebrand
  • optimize vga history with a ring buffer
  • nice help menu with Code page 437 border characters (kfs-2)
  • specify exact nightly version
  • bring back testing and more useful stuff from v2
  • colorful tests (with color module based on colored)
  • full exploration of possible deadlocks
  • print_screen creates a file using serial port
  • insert
  • use https://doc.rust-lang.org/nightly/core/cell/ instead of lazy_static crate
  • Interrupt handlers should only perform the minimal amount of work necessary
  • warning screen (F11)
  • debug screen (F12)
  • optimize x86_64 target
  • finish 1st edition
  • remove stack segments
  • separate user and kernel stacks
  • mouse (scroll history)

check before each push

  • set timeout=10 (and maybe several entries) for correction
  • check your work should not exceed 10 MB before push (try with release mode)
  • fix compiler warnings

resources

artistic direction

artistic direction