First commit

src/panic_handler.rs

@@ -0,0 +1,31 @@
+use core::arch::asm;
+
+use alloc::{
+    format,
+    string::{String, ToString},
+};
+use log::error;
+
+use crate::vga::{Color, FONT_HEIGHT, Vga};
+
+#[panic_handler]
+fn panic(panic_info: &core::panic::PanicInfo) -> ! {
+    error!("PANIC !");
+    let mut panic_message = if let Some(message) = panic_info.message().as_str() {
+        message.to_string()
+    } else {
+        String::new()
+    };
+    if let Some(location) = panic_info.location() {
+        panic_message = format!("{panic_message} at {}:{}", location.file(), location.line());
+    }
+    error!("{panic_message}");
+
+    Vga::clear_screen(Color::WHITE);
+    unsafe { Vga::draw_string(0, 0, "PANIC !", Color::BLACK) };
+    unsafe { Vga::draw_string(0, FONT_HEIGHT as u16, panic_message, Color::BLACK) };
+
+    loop {
+        unsafe { asm!("wfi") }
+    }
+}