[chore] Update to Rust Edition 2024

Author: Azure-stars

os/Cargo.toml

@@ -2,7 +2,7 @@
 name = "os"
 version = "0.1.0"
 authors = ["Yifan Wu <[email protected]>"]
-edition = "2021"
+edition = "2024"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 

os/src/lang_items.rs

@@ -11,10 +11,10 @@ fn panic(info: &PanicInfo) -> ! {
             "[kernel] Panicked at {}:{} {}",
             location.file(),
             location.line(),
-            info.message().unwrap()
+            info.message()
         );
     } else {
-        println!("[kernel] Panicked: {}", info.message().unwrap());
+        println!("[kernel] Panicked: {}", info.message());
     }
     shutdown()
 }

os/src/main.rs

@@ -11,7 +11,6 @@
 #![deny(warnings)]
 #![no_std]
 #![no_main]
-#![feature(panic_info_message)]
 
 use core::arch::global_asm;
 use log::*;
@@ -29,35 +28,34 @@ global_asm!(include_str!("entry.asm"));
 
 /// clear BSS segment
 pub fn clear_bss() {
-    extern "C" {
-        fn sbss();
-        fn ebss();
+    unsafe extern "C" {
+        unsafe fn sbss();
+        unsafe fn ebss();
     }
     (sbss as usize..ebss as usize).for_each(|a| unsafe { (a as *mut u8).write_volatile(0) });
 }
 
 /// the rust entry-point of os
-#[no_mangle]
+#[unsafe(no_mangle)]
 pub fn rust_main() -> ! {
-    extern "C" {
-        fn stext(); // begin addr of text segment
-        fn etext(); // end addr of text segment
-        fn srodata(); // start addr of Read-Only data segment
-        fn erodata(); // end addr of Read-Only data ssegment
-        fn sdata(); // start addr of data segment
-        fn edata(); // end addr of data segment
-        fn sbss(); // start addr of BSS segment
-        fn ebss(); // end addr of BSS segment
-        fn boot_stack_lower_bound(); // stack lower bound
-        fn boot_stack_top(); // stack top
+    unsafe extern "C" {
+        unsafe fn stext(); // begin addr of text segment
+        unsafe fn etext(); // end addr of text segment
+        unsafe fn srodata(); // start addr of Read-Only data segment
+        unsafe fn erodata(); // end addr of Read-Only data ssegment
+        unsafe fn sdata(); // start addr of data segment
+        unsafe fn edata(); // end addr of data segment
+        unsafe fn sbss(); // start addr of BSS segment
+        unsafe fn ebss(); // end addr of BSS segment
+        unsafe fn boot_stack_lower_bound(); // stack lower bound
+        unsafe fn boot_stack_top(); // stack top
     }
     clear_bss();
     logging::init();
     println!("[kernel] Hello, world!");
     trace!(
         "[kernel] .text [{:#x}, {:#x})",
-        stext as usize,
-        etext as usize
+        stext as usize, etext as usize
     );
     debug!(
         "[kernel] .rodata [{:#x}, {:#x})",
@@ -75,5 +73,5 @@ pub fn rust_main() -> ! {
 
     use crate::board::QEMUExit;
     crate::board::QEMU_EXIT_HANDLE.exit_success(); // CI autotest success
-                                                   //crate::board::QEMU_EXIT_HANDLE.exit_failure(); // CI autoest failed
+    //crate::board::QEMU_EXIT_HANDLE.exit_failure(); // CI autoest failed
 }

rust-toolchain.toml

@@ -1,5 +1,5 @@
 [toolchain]
 profile = "minimal"
 # use the nightly version of the last stable toolchain, see <https://forge.rust-lang.org/>
-channel = "nightly-2024-05-02"
+channel = "nightly-2025-09-18"
 components = ["rust-src", "llvm-tools-preview", "rustfmt", "clippy"]