diff --git a/see/src/extensions.rs b/see/src/extensions.rs
index 87a3276..1e3b8ab 100644
--- a/see/src/extensions.rs
+++ b/see/src/extensions.rs
@@ -1,3 +1,4 @@
+use core::sync::atomic::{AtomicU8, Ordering};
 use hal::{
     clint::{msip, mtimecmp},
     pac::UART0,
@@ -17,11 +18,7 @@ pub fn init() {
     rustsbi::init_ipi(&Ipi);
 }
 
-impl rustsbi::legacy_stdio::LegacyStdio for LegacyConsole {
-    fn getchar(&self) -> u8 {
-        unimplemented!()
-    }
-
+impl LegacyConsole {
     fn putchar(&self, ch: u8) {
         let uart = unsafe { &*UART0::ptr() };
         // 等待 FIFO 空位
@@ -32,6 +29,20 @@ impl rustsbi::legacy_stdio::LegacyStdio for LegacyConsole {
     }
 }
 
+impl rustsbi::legacy_stdio::LegacyStdio for LegacyConsole {
+    fn getchar(&self) -> u8 {
+        unimplemented!()
+    }
+
+    fn putchar(&self, ch: u8) {
+        static LAST: AtomicU8 = AtomicU8::new(0);
+        if ch == b'\n' && LAST.swap(ch, Ordering::Relaxed) != b'\r' {
+            self.putchar(b'\r');
+        }
+        self.putchar(ch);
+    }
+}
+
 impl rustsbi::Timer for Timer {
     fn set_timer(&self, stime_value: u64) {
         mtimecmp::write(stime_value);
diff --git a/spl/src/logging.rs b/spl/src/logging.rs
index e80ecd4..3729f8a 100644
--- a/spl/src/logging.rs
+++ b/spl/src/logging.rs
@@ -1,4 +1,7 @@
-use core::ops::Shl;
+use core::{
+    ops::Shl,
+    sync::atomic::{AtomicU8, Ordering},
+};
 use hal::pac::UART0;
 
 pub struct Out;
@@ -10,17 +13,27 @@ pub enum Hex {
     Fmt(usize),
 }
 
+impl Out {
+    fn putchar(&self, ch: u8) {
+        let uart = unsafe { &*UART0::ptr() };
+        // 等待 FIFO 空位
+        while uart.usr.read().tfnf().is_full() {
+            core::hint::spin_loop();
+        }
+        uart.thr().write(|w| w.thr().variant(ch));
+    }
+}
+
 impl Shl<u8> for Out {
     type Output = Self;
 
     #[inline]
     fn shl(self, rhs: u8) -> Self::Output {
-        let uart = unsafe { &*UART0::ptr() };
-        // 等待 FIFO 空位
-        while uart.usr.read().tfnf().is_full() {
-            core::hint::spin_loop();
+        static LAST: AtomicU8 = AtomicU8::new(0);
+        if rhs == b'\n' && LAST.swap(rhs, Ordering::Relaxed) != b'\r' {
+            self.putchar(b'\r');
         }
-        uart.thr().write(|w| w.thr().variant(rhs));
+        self.putchar(rhs);
         self
     }
 }
diff --git a/xtask/src/components.rs b/xtask/src/components.rs
index f0850d8..cf5208c 100644
--- a/xtask/src/components.rs
+++ b/xtask/src/components.rs
@@ -1,5 +1,5 @@
 use crate::{xfel::Xfel, AsmArg, FlashArgs, Package, Target, XError, DIRS};
-use command_ext::{CommandExt, Ext};
+use command_ext::{dir, CommandExt, Ext};
 use common::uninit;
 use std::{
     ffi::OsStr,
@@ -68,6 +68,7 @@ impl Components {
                     .target
                     .join(dt.file_stem().unwrap_or_else(|| OsStr::new("nezha")))
                     .with_extension("dtb");
+                dir::create_parent(&dtb).unwrap();
                 Ext::new("dtc").arg("-o").arg(&dtb).arg(&dt).invoke();
                 ans.dtb.replace(dtb);
             } else {
@@ -98,6 +99,7 @@ impl Components {
             let path = if output.is_dir() {
                 output.join(package.name()).with_extension("asm")
             } else {
+                dir::create_parent(&output).unwrap();
                 output
             };
             // 保存