diff --git a/src/main.rs b/src/main.rs
index aeb4cd2..76a45cb 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -11,9 +11,11 @@ use std::sync::Arc;
 use serde::{Serialize, Deserialize};
 use serde_json;
 use shlex;
+mod portalcall;
 
 const BUF_SIZE: usize = 65536;
 const CMD_TIMEOUT: Duration = Duration::from_secs(10);
+const INDIV_DEBUG_PORTALCALL_MAGIC: u64 = 0xfeedbeef;
 
 #[derive(Serialize, Deserialize, Debug)]
 struct CmdResult {
@@ -38,6 +40,8 @@ pub struct ListenAddress {
 #[tokio::main]
 async fn main() -> Result<(), Box<dyn std::error::Error>> {
     env_logger::init();
+
+    let _: i64 = portalcall::portal_call1(INDIV_DEBUG_PORTALCALL_MAGIC, 0);
     let args = ListenAddress::from_args();
     let cid = args.cid.unwrap_or(libc::VMADDR_CID_ANY);
     let addr = VsockAddr::new(cid, args.port);
diff --git a/src/portalcall.rs b/src/portalcall.rs
new file mode 100644
index 0000000..7d964b4
--- /dev/null
+++ b/src/portalcall.rs
@@ -0,0 +1,51 @@
+use libc::{syscall, SYS_sendto};
+
+#[cfg(target_pointer_width = "64")]
+const PORTAL_MAGIC: libc::c_ulong = 0xc1d1e1f1;
+#[cfg(not(target_pointer_width = "64"))]
+const PORTAL_MAGIC: libc::c_uint = 0xc1d1e1f1;
+
+#[inline]
+pub fn portal_call(user_magic: u64, argc: i32, args: &[u64]) -> i64 {
+    unsafe {
+        syscall(
+            SYS_sendto,
+            PORTAL_MAGIC,
+            user_magic,
+            argc,
+            args.as_ptr(),
+            0,
+            0,
+        ) as i64
+    }
+}
+
+#[inline]
+#[allow(dead_code)]
+pub fn portal_call1(user_magic: u64, a1: u64) -> i64 {
+    portal_call(user_magic, 1, &[a1])
+}
+
+#[inline]
+#[allow(dead_code)]
+pub fn portal_call2(user_magic: u64, a1: u64, a2: u64) -> i64 {
+    portal_call(user_magic, 2, &[a1, a2])
+}
+
+#[inline]
+#[allow(dead_code)]
+pub fn portal_call3(user_magic: u64, a1: u64, a2: u64, a3: u64) -> i64 {
+    portal_call(user_magic, 3, &[a1, a2, a3])
+}
+
+#[inline]
+#[allow(dead_code)]
+pub fn portal_call4(user_magic: u64, a1: u64, a2: u64, a3: u64, a4: u64) -> i64 {
+    portal_call(user_magic, 4, &[a1, a2, a3, a4])
+}
+
+#[inline]
+#[allow(dead_code)]
+pub fn portal_call5(user_magic: u64, a1: u64, a2: u64, a3: u64, a4: u64, a5: u64) -> i64 {
+    portal_call(user_magic, 5, &[a1, a2, a3, a4, a5])
+}