diff --git a/service/ptos/head/arch/amd64/frame.h b/service/ptos/head/arch/amd64/frame.h
new file mode 100644
index 0000000..6bf6e80
--- /dev/null
+++ b/service/ptos/head/arch/amd64/frame.h
@@ -0,0 +1,40 @@
+/*
+ * Copyright (c) 2026, Chloe M.
+ * Provided under the BSD-3 clause.
+ *
+ * Description: AMD64 trapframe
+ * Author:      Chloe M.
+ */
+
+#ifndef _MACHINE_FRAME_H_
+#define _MACHINE_FRAME_H_ 1
+
+#include <ptdef.h>
+
+typedef struct PACKED {
+    UQUAD Vector;
+    UQUAD Rax;
+    UQUAD Rbx;
+    UQUAD Rcx;
+    UQUAD Rdx;
+    UQUAD Rsi;
+    UQUAD Rdi;
+    UQUAD Rbp;
+    UQUAD R8;
+    UQUAD R9;
+    UQUAD R10;
+    UQUAD R11;
+    UQUAD R12;
+    UQUAD R13;
+    UQUAD R14;
+    UQUAD R15;
+    /* Pushed by hardawre */
+    UQUAD ErrorCode;
+    UQUAD Rip;
+    UQUAD CodeSeg;
+    UQUAD Rflags;
+    UQUAD Rsp;
+    UQUAD StackSeg;
+} TRAP_FRAME;
+
+#endif  /* !_MACHINE_FRAME_H_ */