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

os/Cargo.toml

@@ -2,7 +2,7 @@
 name = "os"
 version = "0.1.0"
 authors = ["Yifan Wu <shinbokuow@163.com>"]
-edition = "2021"
+edition = "2024"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 

os/src/drivers/block/virtio_blk.rs

@@ -1,7 +1,7 @@
 use super::BlockDevice;
 use crate::mm::{
-    frame_alloc, frame_dealloc, kernel_token, FrameTracker, PageTable, PhysAddr, PhysPageNum,
-    StepByOne, VirtAddr,
+    FrameTracker, PageTable, PhysAddr, PhysPageNum, StepByOne, VirtAddr, frame_alloc,
+    frame_dealloc, kernel_token,
 };
 use crate::sync::UPSafeCell;
 use alloc::vec::Vec;

os/src/fs/mod.rs

@@ -15,5 +15,5 @@ pub trait File: Send + Sync {
     fn write(&self, buf: UserBuffer) -> usize;
 }
 
-pub use inode::{list_apps, open_file, OSInode, OpenFlags};
+pub use inode::{OSInode, OpenFlags, list_apps, open_file};
 pub use stdio::{Stdin, Stdout};

os/src/lang_items.rs

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

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();

os/src/mm/frame_allocator.rs

@@ -94,8 +94,8 @@ lazy_static! {
 }
 /// initiate the frame allocator using `ekernel` and `MEMORY_END`
 pub fn init_frame_allocator() {
-    extern "C" {
-        fn ekernel();
+    unsafe extern "C" {
+        safe fn ekernel();
     }
     FRAME_ALLOCATOR.exclusive_access().init(
         PhysAddr::from(ekernel as usize).ceil(),

os/src/mm/heap_allocator.rs

@@ -1,6 +1,7 @@
 //! The global allocator
 use crate::config::KERNEL_HEAP_SIZE;
 use buddy_system_allocator::LockedHeap;
+use core::ptr::addr_of_mut;
 
 #[global_allocator]
 /// heap allocator instance
@@ -18,7 +19,7 @@ pub fn init_heap() {
     unsafe {
         HEAP_ALLOCATOR
             .lock()
-            .init(HEAP_SPACE.as_ptr() as usize, KERNEL_HEAP_SIZE);
+            .init(addr_of_mut!(HEAP_SPACE) as usize, KERNEL_HEAP_SIZE);
     }
 }
 
@@ -26,9 +27,9 @@ pub fn init_heap() {
 pub fn heap_test() {
     use alloc::boxed::Box;
     use alloc::vec::Vec;
-    extern "C" {
-        fn sbss();
-        fn ebss();
+    unsafe extern "C" {
+        safe fn sbss();
+        safe fn ebss();
     }
     let bss_range = sbss as usize..ebss as usize;
     let a = Box::new(5);

os/src/mm/memory_set.rs

@@ -1,5 +1,6 @@
 //! Implementation of [`MapArea`] and [`MemorySet`].
-use super::{frame_alloc, FrameTracker};
+
+use super::{FrameTracker, frame_alloc};
 use super::{PTEFlags, PageTable, PageTableEntry};
 use super::{PhysAddr, PhysPageNum, VirtAddr, VirtPageNum};
 use super::{StepByOne, VPNRange};
@@ -12,17 +13,17 @@ use core::arch::asm;
 use lazy_static::*;
 use riscv::register::satp;
 
-extern "C" {
-    fn stext();
-    fn etext();
-    fn srodata();
-    fn erodata();
-    fn sdata();
-    fn edata();
-    fn sbss_with_stack();
-    fn ebss();
-    fn ekernel();
-    fn strampoline();
+unsafe extern "C" {
+    safe fn stext();
+    safe fn etext();
+    safe fn srodata();
+    safe fn erodata();
+    safe fn sdata();
+    safe fn edata();
+    safe fn sbss_with_stack();
+    safe fn ebss();
+    safe fn ekernel();
+    safe fn strampoline();
 }
 
 lazy_static! {
@@ -389,20 +390,26 @@ pub fn remap_test() {
     let mid_text: VirtAddr = ((stext as usize + etext as usize) / 2).into();
     let mid_rodata: VirtAddr = ((srodata as usize + erodata as usize) / 2).into();
     let mid_data: VirtAddr = ((sdata as usize + edata as usize) / 2).into();
-    assert!(!kernel_space
-        .page_table
-        .translate(mid_text.floor())
-        .unwrap()
-        .writable(),);
-    assert!(!kernel_space
-        .page_table
-        .translate(mid_rodata.floor())
-        .unwrap()
-        .writable(),);
-    assert!(!kernel_space
-        .page_table
-        .translate(mid_data.floor())
-        .unwrap()
-        .executable(),);
+    assert!(
+        !kernel_space
+            .page_table
+            .translate(mid_text.floor())
+            .unwrap()
+            .writable(),
+    );
+    assert!(
+        !kernel_space
+            .page_table
+            .translate(mid_rodata.floor())
+            .unwrap()
+            .writable(),
+    );
+    assert!(
+        !kernel_space
+            .page_table
+            .translate(mid_data.floor())
+            .unwrap()
+            .executable(),
+    );
     println!("remap_test passed!");
 }

os/src/mm/mod.rs

@@ -13,13 +13,13 @@ mod page_table;
 
 use address::VPNRange;
 pub use address::{PhysAddr, PhysPageNum, StepByOne, VirtAddr, VirtPageNum};
-pub use frame_allocator::{frame_alloc, frame_dealloc, FrameTracker};
+pub use frame_allocator::{FrameTracker, frame_alloc, frame_dealloc};
 pub use memory_set::remap_test;
-pub use memory_set::{kernel_token, MapPermission, MemorySet, KERNEL_SPACE};
+pub use memory_set::{KERNEL_SPACE, MapPermission, MemorySet, kernel_token};
 use page_table::PTEFlags;
 pub use page_table::{
-    translated_byte_buffer, translated_ref, translated_refmut, translated_str, PageTable,
-    PageTableEntry, UserBuffer, UserBufferIterator,
+    PageTable, PageTableEntry, UserBuffer, UserBufferIterator, translated_byte_buffer,
+    translated_ref, translated_refmut, translated_str,
 };
 /// initiate heap allocator, frame allocator and kernel space
 pub fn init() {

os/src/mm/page_table.rs

@@ -1,5 +1,6 @@
 //! Implementation of [`PageTableEntry`] and [`PageTable`].
-use super::{frame_alloc, FrameTracker, PhysAddr, PhysPageNum, StepByOne, VirtAddr, VirtPageNum};
+
+use super::{FrameTracker, PhysAddr, PhysPageNum, StepByOne, VirtAddr, VirtPageNum, frame_alloc};
 use alloc::string::String;
 use alloc::vec;
 use alloc::vec::Vec;

os/src/sbi.rs

@@ -20,7 +20,7 @@ pub fn set_timer(timer: usize) {
 
 /// use sbi call to shutdown the kernel
 pub fn shutdown(failure: bool) -> ! {
-    use sbi_rt::{system_reset, NoReason, Shutdown, SystemFailure};
+    use sbi_rt::{NoReason, Shutdown, SystemFailure, system_reset};
     if !failure {
         system_reset(Shutdown, NoReason);
     } else {

os/src/syscall/fs.rs

@@ -1,6 +1,6 @@
 //! File and filesystem-related syscalls
-use crate::fs::{open_file, OpenFlags};
-use crate::mm::{translated_byte_buffer, translated_str, UserBuffer};
+use crate::fs::{OpenFlags, open_file};
+use crate::mm::{UserBuffer, translated_byte_buffer, translated_str};
 use crate::task::{current_task, current_user_token};
 
 pub fn sys_write(fd: usize, buf: *const u8, len: usize) -> isize {

os/src/syscall/process.rs

@@ -1,4 +1,4 @@
-use crate::fs::{open_file, OpenFlags};
+use crate::fs::{OpenFlags, open_file};
 use crate::mm::{translated_refmut, translated_str};
 use crate::task::{
     add_task, current_task, current_user_token, exit_current_and_run_next,

os/src/task/mod.rs

@@ -23,20 +23,20 @@ mod switch;
 #[allow(rustdoc::private_intra_doc_links)]
 mod task;
 
-use crate::fs::{open_file, OpenFlags};
+use crate::fs::{OpenFlags, open_file};
 use crate::sbi::shutdown;
 use alloc::sync::Arc;
 pub use context::TaskContext;
 use lazy_static::*;
-pub use manager::{fetch_task, TaskManager};
+pub use manager::{TaskManager, fetch_task};
 use switch::__switch;
 use task::{TaskControlBlock, TaskStatus};
 
 pub use manager::add_task;
-pub use pid::{pid_alloc, KernelStack, PidAllocator, PidHandle};
+pub use pid::{KernelStack, PidAllocator, PidHandle, pid_alloc};
 pub use processor::{
-    current_task, current_trap_cx, current_user_token, run_tasks, schedule, take_current_task,
-    Processor,
+    Processor, current_task, current_trap_cx, current_user_token, run_tasks, schedule,
+    take_current_task,
 };
 /// Suspend the current 'Running' task and run the next task in task list.
 pub fn suspend_current_and_run_next() {

os/src/task/pid.rs

@@ -1,6 +1,6 @@
 //!Implementation of [`PidAllocator`]
 use crate::config::{KERNEL_STACK_SIZE, PAGE_SIZE, TRAMPOLINE};
-use crate::mm::{MapPermission, VirtAddr, KERNEL_SPACE};
+use crate::mm::{KERNEL_SPACE, MapPermission, VirtAddr};
 use crate::sync::UPSafeCell;
 use alloc::vec::Vec;
 use lazy_static::*;

os/src/task/processor.rs

@@ -1,7 +1,7 @@
 //!Implementation of [`Processor`] and Intersection of control flow
 use super::__switch;
-use super::{fetch_task, TaskStatus};
 use super::{TaskContext, TaskControlBlock};
+use super::{TaskStatus, fetch_task};
 use crate::sync::UPSafeCell;
 use crate::trap::TrapContext;
 use alloc::sync::Arc;

os/src/task/switch.rs

@@ -4,6 +4,11 @@ use core::arch::global_asm;
 
 global_asm!(include_str!("switch.S"));
 
-extern "C" {
-    pub fn __switch(current_task_cx_ptr: *mut TaskContext, next_task_cx_ptr: *const TaskContext);
+unsafe extern "C" {
+    /// Switch to the context of `next_task_cx_ptr`, saving the current context
+    /// in `current_task_cx_ptr`.
+    pub unsafe fn __switch(
+        current_task_cx_ptr: *mut TaskContext,
+        next_task_cx_ptr: *const TaskContext,
+    );
 }

os/src/task/task.rs

@@ -1,11 +1,11 @@
 //!Implementation of [`TaskControlBlock`]
 use super::TaskContext;
-use super::{pid_alloc, KernelStack, PidHandle};
+use super::{KernelStack, PidHandle, pid_alloc};
 use crate::config::TRAP_CONTEXT;
 use crate::fs::{File, Stdin, Stdout};
-use crate::mm::{MemorySet, PhysPageNum, VirtAddr, KERNEL_SPACE};
+use crate::mm::{KERNEL_SPACE, MemorySet, PhysPageNum, VirtAddr};
 use crate::sync::UPSafeCell;
-use crate::trap::{trap_handler, TrapContext};
+use crate::trap::{TrapContext, trap_handler};
 use alloc::sync::{Arc, Weak};
 use alloc::vec;
 use alloc::vec::Vec;

os/src/trap/context.rs

@@ -1,5 +1,5 @@
 //! Implementation of [`TrapContext`]
-use riscv::register::sstatus::{self, Sstatus, SPP};
+use riscv::register::sstatus::{self, SPP, Sstatus};
 
 #[repr(C)]
 #[derive(Debug)]

os/src/trap/mod.rs

@@ -50,7 +50,7 @@ pub fn enable_timer_interrupt() {
     }
 }
 
-#[no_mangle]
+#[unsafe(no_mangle)]
 /// handle an interrupt, exception, or system call from user space
 pub fn trap_handler() -> ! {
     set_kernel_trap_entry();
@@ -103,7 +103,7 @@ pub fn trap_handler() -> ! {
     trap_return();
 }
 
-#[no_mangle]
+#[unsafe(no_mangle)]
 /// set the new addr of __restore asm function in TRAMPOLINE page,
 /// set the reg a0 = trap_cx_ptr, reg a1 = phy addr of usr page table,
 /// finally, jump to new addr of __restore asm function
@@ -111,9 +111,9 @@ pub fn trap_return() -> ! {
     set_user_trap_entry();
     let trap_cx_ptr = TRAP_CONTEXT;
     let user_satp = current_user_token();
-    extern "C" {
-        fn __alltraps();
-        fn __restore();
+    unsafe extern "C" {
+        unsafe fn __alltraps();
+        unsafe fn __restore();
     }
     let restore_va = __restore as usize - __alltraps as usize + TRAMPOLINE;
     unsafe {
@@ -128,7 +128,7 @@ pub fn trap_return() -> ! {
     }
 }
 
-#[no_mangle]
+#[unsafe(no_mangle)]
 /// Unimplement: traps/interrupts/exceptions from kernel mode
 /// Todo: Chapter 9: I/O device
 pub fn trap_from_kernel() -> ! {