map private mem in agent

src/agent.jazz

@@ -78,14 +78,28 @@ inline fn x25519(reg u64 shared_mem sync_mem private_mem) {
     jade_scalarmult_curve25519_amd64_mulx(outptr, keyptr, pkptr);
 }
 
-export fn agent_start(reg u64 shared_mem sync_mem private_mem) {
+export fn agent_start(reg u64 shared_mem sync_mem private_mem_fd) {
     stack u64 key_id;
-    reg u64 futex_op, val, timeout, uaddr2, val3, woken_up;
+    reg u64 private_mem;
+    // Futex varibles
+    reg u64 futex_op val timeout uaddr2 val3 woken_up;
+    // Mmap variables
+    reg u64 addr len prot flag off;
+
+    () = #spill(shared_mem, sync_mem);
+
+    private_mem_fd = private_mem_fd;
+    addr = 0;
+    len = 3200;
+    prot = 3; // PROT_READ | PROT_WRITE
+    flag = 1; // MAP_SHARED;
+    off = 0;
+    private_mem = #mmap(addr, len, prot, flag, private_mem_fd, off);
+
+    () = #spill(private_mem);
 
     key_id = 0;
 
-    () = #spill(shared_mem, sync_mem, private_mem);
-
      while (true) {
         () = #unspill(sync_mem);