Rust Standard Library

Currently, everything is built by Rust, we don't have libc yet. And instead we have a custom rust target that we use to build our userspace programs.

This is implemented in my fork of rust-lang/rust.

We have the target x86_64-unknown-emerald. The changes needed are in rust/library/std/src/sys/emerald and rust/library/std/src/os/emerald.

These changes are provided by another crate emerald_std, where we have all the basic implementation of userspace functionalities including:

• allocator: See Heap Allocator for more details.
• files and io: For file operations and input/output.
• process: For process management.

This crate, is very basic and only performs syscalls basically, nothing much else, then in rust we perform the rest of the bindings.

Using rust like this gives us a lot of benefits, since we just need to implement basic unsafe functionalities, and it will handle synchronization, memory management, etc., of course we need to make sure our implementation is correct.