completed a basic bootable kernel in rust

Cargo.toml

@@ -4,3 +4,6 @@ version = "0.1.0"
 authors = ["ishanjain28 <ishanjain28@gmail.com>"]
 
 [dependencies]
+
+[package.metadata.bootimage]
+default-target = "x86_64-os.json"

src/main.rs

@@ -11,7 +11,18 @@ pub fn panic(_info: &PanicInfo) -> ! {
     loop {}
 }
 
+static HELLO: &[u8] = b"Hello World!";
+
 #[no_mangle] // don't change the name of function in symbol table
 pub extern "C" fn _start() -> ! {
+    let vga_buffer = 0xb8000 as *mut u8;
+
+    for (i, &byte) in HELLO.iter().enumerate() {
+        unsafe {
+            *vga_buffer.offset(i as isize * 2) = byte;
+            *vga_buffer.offset(i as isize * 2 + 1) = 0xb;
+        }
+    }
+
     loop {}
 }