Bump Rust version to nightly-2025-02-18(2024 Edition)

os/src/main.rs

@@ -23,7 +23,6 @@
 #![allow(unused_imports)]
 #![no_std]
 #![no_main]
-#![feature(panic_info_message)]
 #![feature(alloc_error_handler)]
 
 extern crate alloc;
@@ -56,9 +55,9 @@ use core::arch::global_asm;
 global_asm!(include_str!("entry.asm"));
 /// clear BSS segment
 fn clear_bss() {
-    extern "C" {
-        fn sbss();
-        fn ebss();
+    unsafe extern "C" {
+        safe fn sbss();
+        safe fn ebss();
     }
     unsafe {
         core::slice::from_raw_parts_mut(sbss as usize as *mut u8, ebss as usize - sbss as usize)
@@ -66,8 +65,8 @@ fn clear_bss() {
     }
 }
 
-#[no_mangle]
 /// the rust entry-point of os
+#[unsafe(no_mangle)]
 pub fn rust_main() -> ! {
     clear_bss();
     logging::init();