diff --git a/kernel/main.c b/kernel/main.c
index e0806dec903a57a731fc6d24b6c47349ad53ace3..ba5f2df314f7bf2dbecdb7d67b58fb5f3b6495e3 100644
--- a/kernel/main.c
+++ b/kernel/main.c
@@ -170,7 +170,7 @@ static void run_sh() {
     int pid;
     if (!(pid=fork())) {
         printf("read to start shell\n");
-        execve("/usr/bin/ls", argv,envp);
+        execve("/tmp/et", argv,envp);
     }
 }
 
diff --git a/tools/tcc/Makefile b/tools/tcc/Makefile
index 2bd6065b16d9f7d1c5166e18d27889b3b3462d9a..8d0e1c42b14d540052dbabc5cf65568d85af85e3 100644
--- a/tools/tcc/Makefile
+++ b/tools/tcc/Makefile
@@ -1,7 +1,7 @@
 AR  	:= ar
 GCC		:= gcc
 CCFLAG 	:= -m32 -I./include -ffreestanding -fno-pic -Wall -fomit-frame-pointer -fno-stack-protector -c
-OBJS	:= write.o errno.o printf.o vsprintf.o string.o
+OBJS	:= write.o errno.o printf.o vsprintf.o string.o crt0.o
 
 libc.a: $(OBJS)
 	$(AR) rcs $@ $^
@@ -22,6 +22,9 @@ vsprintf.o: runtime/vsprintf.c
 string.o: runtime/string.c
 	$(GCC) $(CCFLAG) -o $@ $<
 
+crt0.o: runtime/crt0.S
+	$(GCC) $(CCFLAG) -o $@ $<
+
 clean:
 	-rm *.o
 	-rm libc.a
diff --git a/tools/tcc/crt0.S b/tools/tcc/runtime/crt0.S
similarity index 79%
rename from tools/tcc/crt0.S
rename to tools/tcc/runtime/crt0.S
index bd5e46dc3b5e65649bdcf4c3691444e23823effa..d9973f184bd3698c7e76f7be193a76730e197ccd 100644
--- a/tools/tcc/crt0.S
+++ b/tools/tcc/runtime/crt0.S
@@ -1,5 +1,4 @@
 .code32
-
 .text
 
 .globl _environ, _start
@@ -8,7 +7,9 @@ _start:
  movl 8(%esp),%eax
  movl %eax,_environ
  call main
- ret
+ pushl %eax
+1: call exit
+ jmp 1b
 
 .data
 
diff --git a/tools/tcc/runtime/write.c b/tools/tcc/runtime/write.c
index 2613f17e37e2a26064bd13520d05c3dc0d147081..67b09f7a948f19b0147e8a5e2b36d9e45c55c946 100644
--- a/tools/tcc/runtime/write.c
+++ b/tools/tcc/runtime/write.c
@@ -2,3 +2,4 @@
 #include <unistd.h>
 
 _syscall3(int,write,int,fd,const char *,buf,off_t,count)
+_syscall1(int,exit,int,fd);
diff --git a/tools/tcc/test/test.c b/tools/tcc/test/test.c
index 6248279c8c1327afdf48467297e23925a4ec06af..ccc6757dbf9123a2de5eaabcaf3129e9f6d038dd 100644
--- a/tools/tcc/test/test.c
+++ b/tools/tcc/test/test.c
@@ -2,14 +2,15 @@
 
 int main(int argc, char** argv, char** envp) {
     printf("argc is %d\n", argc);
+    printf("argv:\n");
     while (*argv) {
-        write(1, *argv, 3);
+        printf("%s\n", *argv);
         argv++;
     }
 
-    write(1, "envp\n", 5);
+    printf("envp:\n");
     while (*envp) {
-        write(1, *envp, 4);
+        printf("%s\n", *envp);
         envp++;
     }