kernel/src/main.rs


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#![no_std]
#![no_main]

use core::panic::PanicInfo;

static HELLO: &[u8] = b"Hello, World!";

#[panic_handler]
fn panic(_info: &PanicInfo) -> ! {
    loop {}
}

#[unsafe(no_mangle)]
pub extern "C" fn _start() -> ! {
    let gob_buffer = 0xb8000 as *mut u8;

    for (i, &byte) in HELLO.iter().enumerate() {
        unsafe {
            *gob_buffer.offset(i as isize * 2) = byte; // Puts the ASCII char into the buffer
            *gob_buffer.offset(i as isize * 2 + 1) = 0xb; // Colors it white on black
        }
    }
    loop {}
}