a silly operating system (mostly) written in Rust

Make sure you have qemu, nasm and grub (for grub-mkrescue) installed and are on an x86_64 system. Then:

$ rustup install nightly && rustup default nightly
$ cargo install xargo
$ make run

If nothing broke then qemu should launch after a while and boot the OS.

What works

• boot information is received from a multiboot2-compliant bootloader (e.g. Grub)
• switching to long mode (64-bit)
• calling into Rust (assembly is only used for the very early stage of boot)
• VGA console with colour
• 4-level page table with recursive mapping
• remapping the kernel into the page table, with NX and write-protect
• stack with guard page
• heap allocator (allowing Rust Box, Vec, BTreeMap, etc to be used)
• interrupts: breakpoint & double fault handlers, with double fault handler called with a separate stack to prevent triple faults

Next

• keyboard input