From ea67cef4bcabeaaa8a72d4694d74ef4901b164d2 Mon Sep 17 00:00:00 2001
From: Yu Chen <yuchen@mail.tsinghua.edu.cn>
Date: Wed, 6 Jul 2022 15:10:14 +0800
Subject: [PATCH] update .gitignore

---
 .gitignore | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/.gitignore b/.gitignore
index 2d54722..dd4df19 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,3 +6,7 @@ os/src/link_app.S
 os/last-*
 tools
 workplace/
+os2-ref/src/link_app.S
+os3-ref/src/link_app.S
+os4-ref/src/link_app.S
+os5-ref/src/link_app.S
\ No newline at end of file