diff --git a/.gitignore b/.gitignore
index 8ffc911..7c90ffe 100644
--- a/.gitignore
+++ b/.gitignore
@@ -13,5 +13,8 @@ utils
 .vscode
 dev_tools/build_util_src/*.tar.xz
 dev_tools/build_util_src/higher_half_test
+dev_tools/jos_ref
+dev_tools/build_util_src/cross_compiler_test/*.o
+dev_tools/build_util_src/cross_compiler_test/test.bin
 notes/FreeBSD's bootloader.png
 notes/quick_sort_explore.c
\ No newline at end of file