diff --git a/kernel/src/fs/stdio.rs b/kernel/src/fs/stdio.rs
index 11a342e..6a73c28 100644
--- a/kernel/src/fs/stdio.rs
+++ b/kernel/src/fs/stdio.rs
@@ -29,7 +29,14 @@ impl Stdin {
                 return c;
             }
         }
-        #[cfg(not(feature = "board_k210"))]
+        #[cfg(feature = "board_rocket_chip")]
+        loop {
+            let c = crate::arch::io::getchar();
+            if c != '\0' && c as u8 != 254 {
+                return c;
+            }
+        }
+        #[cfg(not(any(feature = "board_k210", feature = "board_rocket_chip")))]
         loop {
             let mut buf_lock = self.buf.lock();
             match buf_lock.pop_front() {
@@ -41,7 +48,12 @@ impl Stdin {
         }
     }
     pub fn can_read(&self) -> bool {
-        self.buf.lock().len() > 0
+        // Currently, rocket-chip implementation rely on htif interface, the serial interrupt DO
+        // NOT work, so return true always
+        #[cfg(feature = "board_rocket_chip")]
+        return true;
+        #[cfg(not(feature = "board_rocket_chip"))]
+        return self.buf.lock().len() > 0;
     }
 }
 
diff --git a/kernel/src/shell.rs b/kernel/src/shell.rs
index 7e8822b..45274c8 100644
--- a/kernel/src/shell.rs
+++ b/kernel/src/shell.rs
@@ -4,6 +4,7 @@ use crate::fs::ROOT_INODE;
 use crate::process::*;
 use alloc::string::String;
 use alloc::vec::Vec;
+use crate::arch::io;
 
 #[cfg(not(feature = "run_cmdline"))]
 pub fn add_user_shell() {
@@ -44,6 +45,7 @@ pub fn add_user_shell() {
     let inode = ROOT_INODE.lookup(&cmdline).unwrap();
     processor().manager().add(Thread::new_user(
         &inode,
+        "/busybox",
         cmdline.split(' ').map(|s| s.into()).collect(),
         Vec::new(),
     ));
diff --git a/tools/addr2line.py b/tools/addr2line.py
old mode 100644
new mode 100755