rCore

Implementation

• Bootloader
  • Initialization
  • Entering S mode for the kernel
• Allocator
  • Buddy allocator
  • Frame allocator (or any fine-grained allocator for any size of memory)
  • SLAB (Optional)
• Page table
  • For kernel
  • For each user process
• Console
  • Read
  • Write
• Message & data transfer
  • User -> Kernel (syscall)
  • Kernel -> User (syscall)
  • [?] Kernel -> Kernel
  • User -> User (pipe)
• Process
  • Process loading
    • ELF parsing
    • Sections loading (ref to page table)
  • Syscall
    • Kick off a new process (Something like fork and exec)
    • Wait for child processes (Something like wait)
    • Exit from a process (Something like exit)
  • Process manager
    • Process creation
    • Process termination
  • Scheduler
    • Context switch
    • Scheduling mechanism (must be time sharing)
      • Advanced scheduling mechanism (Optional)
    • Timer interrupt
    • IPI (Optional)
  • IPC
    • Pipe
• Synchronization primitives
  • Mutex
  • Conditional variables (Optional)
• File system (Optional)
  • File/directory creation/deletion
  • File/directory renaming
  • File read
  • File write
  • File/directory moving
  • (optional) access control, atime/mtime/…
• Multicore (Optional)
• Driver (Optional)