From ceff1ad60936347f87c944a3ad1e138a884fedb4 Mon Sep 17 00:00:00 2001
From: Jiajie Chen <noc@jiegec.ac.cn>
Date: Fri, 5 Apr 2019 20:54:38 +0800
Subject: [PATCH] Fix aarch64 backtrace

---
 kernel/src/backtrace.rs | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/kernel/src/backtrace.rs b/kernel/src/backtrace.rs
index a4b4ecf..32f6919 100644
--- a/kernel/src/backtrace.rs
+++ b/kernel/src/backtrace.rs
@@ -71,6 +71,9 @@ pub fn backtrace() {
             #[cfg(target_arch = "aarch64")]
             {
                 current_fp = *(current_fp as *const usize);
+                if current_fp < crate::arch::consts::KERNEL_OFFSET {
+                    break;
+                }
                 if current_fp != 0 {
                     current_pc = *(current_fp as *const usize).offset(1);
                 }