diff --git a/MdePkg/Library/BaseLib/Ia32/EnablePaging64.nasm b/MdePkg/Library/BaseLib/Ia32/EnablePaging64.nasm
index 544e3c3892464..7a8a8fa1d5c62 100644
--- a/MdePkg/Library/BaseLib/Ia32/EnablePaging64.nasm
+++ b/MdePkg/Library/BaseLib/Ia32/EnablePaging64.nasm
@@ -30,6 +30,10 @@
 ;------------------------------------------------------------------------------
 global ASM_PFX(InternalX86EnablePaging64)
 ASM_PFX(InternalX86EnablePaging64):
+    jmp $
+    mov     dx, 0x3f8
+    mov     al, 't'
+    out     dx, al 
     cli
     mov     DWORD [esp], .0         ; offset for far retf, seg is the 1st arg
     mov     eax, cr4
diff --git a/MdePkg/Library/BaseLib/Ia32/WriteIdtr.nasm b/MdePkg/Library/BaseLib/Ia32/WriteIdtr.nasm
index 074dc1846011a..09ad9b65c3cf5 100644
--- a/MdePkg/Library/BaseLib/Ia32/WriteIdtr.nasm
+++ b/MdePkg/Library/BaseLib/Ia32/WriteIdtr.nasm
@@ -26,6 +26,9 @@
 ;------------------------------------------------------------------------------
 global ASM_PFX(InternalX86WriteIdtr)
 ASM_PFX(InternalX86WriteIdtr):
+    mov     dx, 0x3f8
+    mov     al, 't'
+    out     dx, al 
     mov     eax, [esp + 4]
     pushfd
     cli
diff --git a/MdePkg/Library/BaseLib/UnitTestHostBaseLib.inf b/MdePkg/Library/BaseLib/UnitTestHostBaseLib.inf
index d09bd12bef19d..4d78e64fa286a 100644
--- a/MdePkg/Library/BaseLib/UnitTestHostBaseLib.inf
+++ b/MdePkg/Library/BaseLib/UnitTestHostBaseLib.inf
@@ -240,6 +240,7 @@
   PcdLib
   DebugLib
   BaseMemoryLib
+  IoLib
 
 [Pcd]
   gEfiMdePkgTokenSpaceGuid.PcdMaximumLinkedListLength      ## SOMETIMES_CONSUMES
diff --git a/MdePkg/Library/BaseLib/X86EnablePaging64.c b/MdePkg/Library/BaseLib/X86EnablePaging64.c
index 1323e68de5fc8..578b71d323a38 100644
--- a/MdePkg/Library/BaseLib/X86EnablePaging64.c
+++ b/MdePkg/Library/BaseLib/X86EnablePaging64.c
@@ -8,9 +8,10 @@
 
 
 
-
+#include <Library/IoLib.h>
 #include "BaseLibInternals.h"
 
+
 /**
   Enables the 64-bit paging mode on the CPU.
 
@@ -53,7 +54,10 @@ AsmEnablePaging64 (
   IN      UINT64                    NewStack
   )
 {
+  IoWrite8(0x3f8, '9');
   ASSERT (EntryPoint != 0);
   ASSERT (NewStack != 0);
+  IoWrite8(0x3f8, '8');
+  CpuDeadLoop();
   InternalX86EnablePaging64 (Cs, EntryPoint, Context1, Context2, NewStack);
 }
diff --git a/MdePkg/Library/BaseLib/X86WriteIdtr.c b/MdePkg/Library/BaseLib/X86WriteIdtr.c
index 9ea979b76d944..b66d601212be2 100644
--- a/MdePkg/Library/BaseLib/X86WriteIdtr.c
+++ b/MdePkg/Library/BaseLib/X86WriteIdtr.c
@@ -8,7 +8,7 @@
 
 
 
-
+#include <Library/IoLib.h>
 #include "BaseLibInternals.h"
 
 /**
@@ -28,6 +28,8 @@ AsmWriteIdtr (
   IN      CONST IA32_DESCRIPTOR     *Idtr
   )
 {
+  IoWrite8(0x3f8, 'z');
   ASSERT (Idtr != NULL);
+  IoWrite8(0x3f8, 'z');
   InternalX86WriteIdtr (Idtr);
 }
diff --git a/UefiPayloadPkg/UefiPayloadEntry/Ia32/DxeLoadFunc.c b/UefiPayloadPkg/UefiPayloadEntry/Ia32/DxeLoadFunc.c
index 186b50a9ed68a..4fab1c4a72027 100644
--- a/UefiPayloadPkg/UefiPayloadEntry/Ia32/DxeLoadFunc.c
+++ b/UefiPayloadPkg/UefiPayloadEntry/Ia32/DxeLoadFunc.c
@@ -345,7 +345,7 @@ HandOffToDxeCore (
 
     DEBUG ((
       DEBUG_INFO,
-      "%a() Stack Base: 0x%lx, Stack Size: 0x%x\n",
+      "%a() Stack Base: 0x%lx, oooooStack Size: 0x%x\n",
       __FUNCTION__,
       BaseOfStack,
       STACK_SIZE
@@ -356,6 +356,7 @@ HandOffToDxeCore (
     // Interrupts will not get turned on until the CPU AP is loaded.
     // Call x64 drivers passing in single argument, a pointer to the HOBs.
     //
+    DEBUG ((DEBUG_INFO, "the AsmEnablePaging64 addr is %p\n", AsmEnablePaging64));
     AsmEnablePaging64 (
       SYS_CODE64_SEL,
       DxeCoreEntryPoint,
diff --git a/UefiPayloadPkg/UefiPayloadEntry/UniversalPayloadEntry.c b/UefiPayloadPkg/UefiPayloadEntry/UniversalPayloadEntry.c
index 98995c80c6f9f..3ee5af36722da 100644
--- a/UefiPayloadPkg/UefiPayloadEntry/UniversalPayloadEntry.c
+++ b/UefiPayloadPkg/UefiPayloadEntry/UniversalPayloadEntry.c
@@ -400,6 +400,8 @@ _ModuleEntryPoint (
   // Call constructor for all libraries
   ProcessLibraryConstructorList ();
 
+  DEBUG ((DEBUG_INFO, "the entrypoint addr is %p\n", _ModuleEntryPoint));
+  DEBUG ((DEBUG_INFO, "the ProcessLibraryConstructorList addr is %p\n", ProcessLibraryConstructorList));
   DEBUG ((DEBUG_INFO, "Entering Universal Payload...\n"));
   DEBUG ((DEBUG_INFO, "sizeof(UINTN) = 0x%x\n", sizeof(UINTN)));
 
@@ -412,7 +414,7 @@ _ModuleEntryPoint (
 
   // Initialize floating point operating environment to be compliant with UEFI spec.
   InitializeFloatingPointUnits ();
-
+  DEBUG ((DEBUG_INFO, "the InitializeFloatingPointUnits addr is %p\n", InitializeFloatingPointUnits));
   // Build HOB based on information from Bootloader
   Status = BuildHobs (BootloaderParameter, &DxeFv);
   ASSERT_EFI_ERROR (Status);