acadia/zion/TODO.md

Zion TODO

Memory Management

Physical Memory

• Reserve lower physical memory for hardware accesses as necessary.
• Return errors rather than panicking on allocation failure

Virtual Memory

• Allow different permissions and caching behaviors on mapped memory.
• Add diagnostics to inspect process memory usage.
• Properly free user stacks on thread exit.

Allocation

• Use a buddy allocator with a real free when an object is too large for the slab allocator.

Faults and Interrupts

• Add additional fault handlers to avoid GP faults.
• Improve process for registering interrupt handlers.

Capabilities

• Add syscalls for inspecting capabilities.
• Add syscalls for restricting capabilities' permissions.
• Randomize/obfuscate capability numbers passed to user space.
• Remove ReplyPort capabilities once the response is sent.

Scheduling

• Add different scheduling priorities.
• Add thread sleep capability.

Large Projects

• Add multiprocessing support.
• Add layer on top of limine to enable multiple bootloaders.
• Add a large amount of debugging info for kernel panics.