wow i did a lot of stuff silly :3

patcher/Cargo.toml

@@ -0,0 +1,6 @@
+[package]
+name = "patcher"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]

patcher/src/main.rs

@@ -0,0 +1,41 @@
+use std::{fs, io::Write};
+
+static MULTIBOOT_HEADER: [u16; 14] = [
+    // Magic fields
+    0xE852, 0x50D6, // Magic number
+    0x0000, 0x0000, // Architecture, 0=i386
+    0x0000, 0x000E, // length of MULTIBOOT_HEADER
+    0x17AD, 0xAF1C, // checksum=all magic field excluding this+this=0
+    
+    // Framebuffer tag- empty flags, no preference for width, height, or bit depth
+    0x0005, 0x0000,
+    0x0014, 0x0000,
+    0x0000, 0x0000
+];
+
+fn from_u16(from: &mut [u16]) -> &[u8] {
+    if cfg!(target_endian = "little") {
+        for byte in from.iter_mut() {
+            *byte = byte.to_be();
+        }
+    }
+
+    let len = from.len().checked_mul(2).unwrap();
+    let ptr: *const u8 = from.as_ptr().cast();
+    unsafe { std::slice::from_raw_parts(ptr, len) }
+}
+
+fn main() {
+    let path = "./kernel.flat";
+    let mut buf = fs::read(path).unwrap();
+    buf = [
+        from_u16(&mut (MULTIBOOT_HEADER.clone())).to_vec(),
+        buf
+    ].concat();
+    fs::OpenOptions::new()
+        .write(true)
+        .open(path)
+        .unwrap()
+        .write(buf.as_mut_slice())
+        .unwrap();
+}