diff --git a/related_info/lab1/Makefile b/related_info/lab1/Makefile
index d965aa9..e6f9adb 100644
--- a/related_info/lab1/Makefile
+++ b/related_info/lab1/Makefile
@@ -1,11 +1,12 @@
 all: lab1-ex0.exe lab1-ex1.exe
 
 lab1-ex0.exe: defines.h lab1-ex0.s
-	gcc -g  -o lab1-ex0.exe lab1-ex0.s
+	gcc  -m32 -g  -o lab1-ex0.exe lab1-ex0.s
+	strace -f ./lab1-ex0.exe
 	
 lab1-ex1.exe: lab1-ex1.c
 	echo "compile and watch the syscalls from lab1-ex1"
-	gcc -o lab1-ex1.exe lab1-ex1.c
+	gcc -m32 -o lab1-ex1.exe lab1-ex1.c
 	strace -c ./lab1-ex1.exe
 	echo "watch the interrupts in linux"
 	more /proc/interrupts
diff --git a/related_info/lab1/lab1-ex0.md b/related_info/lab1/lab1-ex0.md
index 416c42d..3e91c23 100644
--- a/related_info/lab1/lab1-ex0.md
+++ b/related_info/lab1/lab1-ex0.md
@@ -1,15 +1,15 @@
 # 
 Try below command
 ```
-gcc -g  -o lab1-ex0.exe lab1-ex0.s
+gcc -g  -m32 -o lab1-ex0.exe lab1-ex0.s
 ```
 Then you will get lab1_ex0.exe
 
 Try to use below some tools to analysis lab1_ex0.exe 
 ```
-objdump
-nm
+objdump -S ...
+nm 
 file
-
+strace -f ...
 ```
 Try to understand the contents of this .s file.