diff --git a/Cargo.lock b/Cargo.lock
index 9bb9ed5..30384b1 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -6,9 +6,16 @@ version = 3
 name = "burritos"
 version = "0.1.0"
 dependencies = [
+ "cc",
  "libc",
 ]
 
+[[package]]
+name = "cc"
+version = "1.0.79"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "50d30906286121d95be3d479533b458f87493b30a4b5f79a607db8f5d11aa91f"
+
 [[package]]
 name = "libc"
 version = "0.2.140"
diff --git a/Cargo.toml b/Cargo.toml
index 95cb216..911c397 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -7,4 +7,7 @@ edition = "2021"
 libc = { version = "0.2.139", features = ["extra_traits"] }
 
 [registries.crates-io]
-protocol = "sparse"
\ No newline at end of file
+protocol = "sparse"
+
+[build-dependencies]
+cc = "1.0"
\ No newline at end of file
diff --git a/build.rs b/build.rs
new file mode 100644
index 0000000..7b5ec8a
--- /dev/null
+++ b/build.rs
@@ -0,0 +1,5 @@
+fn main() {
+    cc::Build::new()
+        .file("test/userlib/sys.s")
+        .compile("my-asm-lib");
+}
\ No newline at end of file
diff --git a/test/userlib/sys.s b/test/userlib/sys.s
index 64c3069..970117b 100644
--- a/test/userlib/sys.s
+++ b/test/userlib/sys.s
@@ -65,7 +65,7 @@ __start:
 
 		.globl Halt
 	.type	__Halt, @function
-Halt:
+Shutdown:
 	addi a7,zero,SC_HALT
 	ecall
 	jr	ra
diff --git a/test/userlib/syscall.rs b/test/userlib/syscall.rs
new file mode 100644
index 0000000..4350f5a
--- /dev/null
+++ b/test/userlib/syscall.rs
@@ -0,0 +1,21 @@
+pub struct Burritos_Time {
+    seconds: i64,
+    nanos: i64
+}
+pub struct ThreadId{
+    id: u64
+}
+pub struct t_error{
+    t: i32
+}
+extern "C"{
+    fn Shutdown() -> ();
+    fn SysTime(t: Burritos_Time) -> ();
+    fn Exit(status: i32) -> ();
+    fn Exec(name: String) -> ThreadId;
+    fn newThread(debug_name: String, func: i32, arg: i32) -> ThreadId;
+    fn Join (id: ThreadId) -> t_error;
+    fn Yield() -> ();
+    fn Perror(mess: String) -> ();
+
+}
\ No newline at end of file