Re-org the EBC thunk code for better code maintenance.

signed-off-by: jyao1
reviewed-by: lgao4


git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12769 6f19259b-4bc3-4df7-8a09-765794883524

2 files changed, 161 insertions, 239 deletions

diff --git a/MdeModulePkg/Universal/EbcDxe/Ia32/EbcSupport.c b/MdeModulePkg/Universal/EbcDxe/Ia32/EbcSupport.c
index da1ad2cd5d..41dc3a8585 100644
--- a/MdeModulePkg/Universal/EbcDxe/Ia32/EbcSupport.c
+++ b/MdeModulePkg/Universal/EbcDxe/Ia32/EbcSupport.c
@@ -1,6 +1,6 @@
 /** @file

   This module contains EBC support routines that are customized based on

-  the target processor.

+  the target ia32 processor.

 

 Copyright (c) 2006 - 2011, Intel Corporation. All rights reserved.<BR>

 This program and the accompanying materials

@@ -23,10 +23,47 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
 //       platform-specific configurations.

 //

 #define VM_STACK_SIZE   (1024 * 4)

-#define EBC_THUNK_SIZE  32

 

 #define STACK_REMAIN_SIZE (1024 * 4)

 

+//

+// This is instruction buffer used to create EBC thunk

+//

+#define EBC_ENTRYPOINT_SIGNATURE           0xAFAFAFAF

+#define EBC_LL_EBC_ENTRYPOINT_SIGNATURE    0xFAFAFAFA

+UINT8  mInstructionBufferTemplate[] = {

+  //

+  // Add a magic code here to help the VM recognize the thunk..

+  // mov eax, 0xca112ebc  => B8 BC 2E 11 CA

+  //

+  0xB8, 0xBC, 0x2E, 0x11, 0xCA,

+  //

+  // Add code bytes to load up a processor register with the EBC entry point.

+  //  mov eax, EbcEntryPoint  => B8 XX XX XX XX (To be fixed at runtime)

+  // These 4 bytes of the thunk entry is the address of the EBC

+  // entry point.

+  //

+  0xB8, 

+    (UINT8)(EBC_ENTRYPOINT_SIGNATURE & 0xFF),

+    (UINT8)((EBC_ENTRYPOINT_SIGNATURE >> 8) & 0xFF),

+    (UINT8)((EBC_ENTRYPOINT_SIGNATURE >> 16) & 0xFF),

+    (UINT8)((EBC_ENTRYPOINT_SIGNATURE >> 24) & 0xFF),

+  //

+  // Stick in a load of ecx with the address of appropriate VM function.

+  //  mov ecx, EbcLLEbcInterpret  => B9 XX XX XX XX (To be fixed at runtime)

+  //

+  0xB9,

+    (UINT8)(EBC_LL_EBC_ENTRYPOINT_SIGNATURE & 0xFF),

+    (UINT8)((EBC_LL_EBC_ENTRYPOINT_SIGNATURE >> 8) & 0xFF),

+    (UINT8)((EBC_LL_EBC_ENTRYPOINT_SIGNATURE >> 16) & 0xFF),

+    (UINT8)((EBC_LL_EBC_ENTRYPOINT_SIGNATURE >> 24) & 0xFF),

+  //

+  // Stick in jump opcode bytes

+  //  jmp ecx => FF E1

+  //

+  0xFF, 0xE1,

+};

+

 /**

   Begin executing an EBC image.

   This is used for Ebc Thunk call.

@@ -79,54 +116,37 @@ EbcLLCALLEX (
 {

   UINTN    IsThunk;

   UINTN    TargetEbcAddr;

+  UINT8    InstructionBuffer[sizeof(mInstructionBufferTemplate)];

+  UINTN    Index;

+  UINTN    IndexOfEbcEntrypoint;

 

   IsThunk       = 1;

   TargetEbcAddr = 0;

+  IndexOfEbcEntrypoint = 0;

 

   //

   // Processor specific code to check whether the callee is a thunk to EBC.

   //

-  if (*((UINT8 *)FuncAddr) != 0xB8) {

-    IsThunk = 0;

-    goto Action;

-  }

-  if (*((UINT8 *)FuncAddr + 1) != 0xBC)  {

-    IsThunk = 0;

-    goto Action;

-  }

-  if (*((UINT8 *)FuncAddr + 2) != 0x2E)  {

-    IsThunk = 0;

-    goto Action;

-  }

-  if (*((UINT8 *)FuncAddr + 3) != 0x11)  {

-    IsThunk = 0;

-    goto Action;

-  }

-  if (*((UINT8 *)FuncAddr + 4) != 0xCA)  {

-    IsThunk = 0;

-    goto Action;

-  }

-  if (*((UINT8 *)FuncAddr + 5) != 0xB8)  {

-    IsThunk = 0;

-    goto Action;

-  }

-  if (*((UINT8 *)FuncAddr + 10) != 0xB9)  {

-    IsThunk = 0;

-    goto Action;

-  }

-  if (*((UINT8 *)FuncAddr + 15) != 0xFF)  {

-    IsThunk = 0;

-    goto Action;

+  CopyMem (InstructionBuffer, (VOID *)FuncAddr, sizeof(InstructionBuffer));

+  //

+  // Fill the signature according to mInstructionBufferTemplate

+  //

+  for (Index = 0; Index < sizeof(mInstructionBufferTemplate) - sizeof(UINTN); Index++) {

+    if (*(UINTN *)&mInstructionBufferTemplate[Index] == EBC_ENTRYPOINT_SIGNATURE) {

+      *(UINTN *)&InstructionBuffer[Index] = EBC_ENTRYPOINT_SIGNATURE;

+      IndexOfEbcEntrypoint = Index;

+    }

+    if (*(UINTN *)&mInstructionBufferTemplate[Index] == EBC_LL_EBC_ENTRYPOINT_SIGNATURE) {

+      *(UINTN *)&InstructionBuffer[Index] = EBC_LL_EBC_ENTRYPOINT_SIGNATURE;

+    }

   }

-  if (*((UINT8 *)FuncAddr + 16) != 0xE1)  {

+  //

+  // Check if we need thunk to native

+  //

+  if (CompareMem (InstructionBuffer, mInstructionBufferTemplate, sizeof(mInstructionBufferTemplate)) != 0) {

     IsThunk = 0;

-    goto Action;

   }

 

-  TargetEbcAddr = ((UINTN)(*((UINT8 *)FuncAddr + 9)) << 24) + ((UINTN)(*((UINT8 *)FuncAddr + 8)) << 16) +

-                    ((UINTN)(*((UINT8 *)FuncAddr + 7)) << 8) + ((UINTN)(*((UINT8 *)FuncAddr + 6)));

-

-Action:

   if (IsThunk == 1){

     //

     // The callee is a thunk to EBC, adjust the stack pointer down 16 bytes and

@@ -139,11 +159,12 @@ Action:
     VmPtr->Gpr[0] -= 8;

     VmWriteMem64 (VmPtr, (UINTN) VmPtr->Gpr[0], (UINT64) (UINTN) (VmPtr->Ip + Size));

 

+    CopyMem (&TargetEbcAddr, (UINT8 *)FuncAddr + IndexOfEbcEntrypoint, sizeof(UINTN));

     VmPtr->Ip = (VMIP) (UINTN) TargetEbcAddr;

   } else {

     //

     // The callee is not a thunk to EBC, call native code,

-    // and get return value

+    // and get return value.

     //

     VmPtr->Gpr[7] = EbcLLCALLEXNative (FuncAddr, NewStackPointer, FramePtr);

 

@@ -449,8 +470,6 @@ EbcCreateThunks (
   UINT8       *Ptr;

   UINT8       *ThunkBase;

   UINT32      Index;

-  UINT32      Addr;

-  INT32       Size;

   INT32       ThunkSize;

 

   //

@@ -460,10 +479,9 @@ EbcCreateThunks (
     return EFI_INVALID_PARAMETER;

   }

 

-  Size      = EBC_THUNK_SIZE;

-  ThunkSize = Size;

+  ThunkSize = sizeof(mInstructionBufferTemplate);

 

-  Ptr = AllocatePool (Size);

+  Ptr = AllocatePool (sizeof(mInstructionBufferTemplate));

 

   if (Ptr == NULL) {

     return EFI_OUT_OF_RESOURCES;

@@ -481,75 +499,27 @@ EbcCreateThunks (
   *Thunk = (VOID *) Ptr;

 

   //

-  // Add a magic code here to help the VM recognize the thunk..

-  // mov eax, 0xca112ebc  => B8 BC 2E 11 CA

+  // Copy whole thunk instruction buffer template

   //

-  *Ptr = 0xB8;

-  Ptr++;

-  Size--;

-  Addr = (UINT32) 0xCA112EBC;

-  for (Index = 0; Index < sizeof (Addr); Index++) {

-    *Ptr = (UINT8) (UINTN) Addr;

-    Addr >>= 8;

-    Ptr++;

-    Size--;

-  }

+  CopyMem (Ptr, mInstructionBufferTemplate, sizeof(mInstructionBufferTemplate));

 

   //

-  // Add code bytes to load up a processor register with the EBC entry point.

-  // mov eax, 0xaa55aa55  => B8 55 AA 55 AA

-  // The first 8 bytes of the thunk entry is the address of the EBC

-  // entry point.

+  // Patch EbcEntryPoint and EbcLLEbcInterpret

   //

-  *Ptr = 0xB8;

-  Ptr++;

-  Size--;

-  Addr = (UINT32) EbcEntryPoint;

-  for (Index = 0; Index < sizeof (Addr); Index++) {

-    *Ptr = (UINT8) (UINTN) Addr;

-    Addr >>= 8;

-    Ptr++;

-    Size--;

-  }

-  //

-  // Stick in a load of ecx with the address of appropriate VM function.

-  //  mov ecx 12345678h  => 0xB9 0x78 0x56 0x34 0x12

-  //

-  if ((Flags & FLAG_THUNK_ENTRY_POINT) != 0) {

-    Addr = (UINT32) (UINTN) EbcLLExecuteEbcImageEntryPoint;

-  } else {

-    Addr = (UINT32) (UINTN) EbcLLEbcInterpret;

+  for (Index = 0; Index < sizeof(mInstructionBufferTemplate) - sizeof(UINTN); Index++) {

+    if (*(UINTN *)&Ptr[Index] == EBC_ENTRYPOINT_SIGNATURE) {

+      *(UINTN *)&Ptr[Index] = (UINTN)EbcEntryPoint;

+    }

+    if (*(UINTN *)&Ptr[Index] == EBC_LL_EBC_ENTRYPOINT_SIGNATURE) {

+      if ((Flags & FLAG_THUNK_ENTRY_POINT) != 0) {

+        *(UINTN *)&Ptr[Index] = (UINTN)EbcLLExecuteEbcImageEntryPoint;

+      } else {

+        *(UINTN *)&Ptr[Index] = (UINTN)EbcLLEbcInterpret;

+      }

+    }

   }

 

   //

-  // MOV ecx

-  //

-  *Ptr = 0xB9;

-  Ptr++;

-  Size--;

-  for (Index = 0; Index < sizeof (Addr); Index++) {

-    *Ptr = (UINT8) Addr;

-    Addr >>= 8;

-    Ptr++;

-    Size--;

-  }

-  //

-  // Stick in jump opcode bytes for jmp ecx => 0xFF 0xE1

-  //

-  *Ptr = 0xFF;

-  Ptr++;

-  Size--;

-  *Ptr = 0xE1;

-  Size--;

-

-  //

-  // Double check that our defined size is ok (application error)

-  //

-  if (Size < 0) {

-    ASSERT (FALSE);

-    return EFI_BUFFER_TOO_SMALL;

-  }

-  //

   // Add the thunk to the list for this image. Do this last since the add

   // function flushes the cache for us.

   //

diff --git a/MdeModulePkg/Universal/EbcDxe/X64/EbcSupport.c b/MdeModulePkg/Universal/EbcDxe/X64/EbcSupport.c
index a31422b62a..3f99a1a6e2 100644
--- a/MdeModulePkg/Universal/EbcDxe/X64/EbcSupport.c
+++ b/MdeModulePkg/Universal/EbcDxe/X64/EbcSupport.c
@@ -23,10 +23,55 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
 //       platform-specific configurations.

 //

 #define VM_STACK_SIZE   (1024 * 8)

-#define EBC_THUNK_SIZE  64

 

 #define STACK_REMAIN_SIZE (1024 * 4)

 

+//

+// This is instruction buffer used to create EBC thunk

+//

+#define EBC_ENTRYPOINT_SIGNATURE           0xAFAFAFAFAFAFAFAFull

+#define EBC_LL_EBC_ENTRYPOINT_SIGNATURE    0xFAFAFAFAFAFAFAFAull

+UINT8  mInstructionBufferTemplate[] = {

+  //

+  // Add a magic code here to help the VM recognize the thunk..

+  // mov rax, 0xca112ebcca112ebc  => 48 B8 BC 2E 11 CA BC 2E 11 CA

+  //

+  0x48, 0xB8, 0xBC, 0x2E, 0x11, 0xCA, 0xBC, 0x2E, 0x11, 0xCA,

+  //

+  // Add code bytes to load up a processor register with the EBC entry point.

+  //  mov r10, EbcEntryPoint  => 49 BA XX XX XX XX XX XX XX XX (To be fixed at runtime)

+  // These 8 bytes of the thunk entry is the address of the EBC

+  // entry point.

+  //

+  0x49, 0xBA, 

+    (UINT8)(EBC_ENTRYPOINT_SIGNATURE & 0xFF),

+    (UINT8)((EBC_ENTRYPOINT_SIGNATURE >> 8) & 0xFF),

+    (UINT8)((EBC_ENTRYPOINT_SIGNATURE >> 16) & 0xFF),

+    (UINT8)((EBC_ENTRYPOINT_SIGNATURE >> 24) & 0xFF),

+    (UINT8)((EBC_ENTRYPOINT_SIGNATURE >> 32) & 0xFF),

+    (UINT8)((EBC_ENTRYPOINT_SIGNATURE >> 40) & 0xFF),

+    (UINT8)((EBC_ENTRYPOINT_SIGNATURE >> 48) & 0xFF),

+    (UINT8)((EBC_ENTRYPOINT_SIGNATURE >> 56) & 0xFF),

+  //

+  // Stick in a load of r11 with the address of appropriate VM function.

+  //  mov r11, EbcLLEbcInterpret  => 49 BB XX XX XX XX XX XX XX XX (To be fixed at runtime)

+  //

+  0x49, 0xBB,

+    (UINT8)(EBC_LL_EBC_ENTRYPOINT_SIGNATURE & 0xFF),

+    (UINT8)((EBC_LL_EBC_ENTRYPOINT_SIGNATURE >> 8) & 0xFF),

+    (UINT8)((EBC_LL_EBC_ENTRYPOINT_SIGNATURE >> 16) & 0xFF),

+    (UINT8)((EBC_LL_EBC_ENTRYPOINT_SIGNATURE >> 24) & 0xFF),

+    (UINT8)((EBC_LL_EBC_ENTRYPOINT_SIGNATURE >> 32) & 0xFF),

+    (UINT8)((EBC_LL_EBC_ENTRYPOINT_SIGNATURE >> 40) & 0xFF),

+    (UINT8)((EBC_LL_EBC_ENTRYPOINT_SIGNATURE >> 48) & 0xFF),

+    (UINT8)((EBC_LL_EBC_ENTRYPOINT_SIGNATURE >> 56) & 0xFF),

+  //

+  // Stick in jump opcode bytes

+  //  jmp r11 => 41 FF E3

+  //

+  0x41, 0xFF, 0xE3,

+};

+

 /**

   Begin executing an EBC image.

   This is used for Ebc Thunk call.

@@ -382,8 +427,6 @@ EbcCreateThunks (
   UINT8       *Ptr;

   UINT8       *ThunkBase;

   UINT32      Index;

-  UINT64      Addr;

-  INT32       Size;

   INT32       ThunkSize;

 

   //

@@ -393,10 +436,9 @@ EbcCreateThunks (
     return EFI_INVALID_PARAMETER;

   }

 

-  Size      = EBC_THUNK_SIZE;

-  ThunkSize = Size;

+  ThunkSize = sizeof(mInstructionBufferTemplate);

 

-  Ptr = AllocatePool (Size);

+  Ptr = AllocatePool (sizeof(mInstructionBufferTemplate));

 

   if (Ptr == NULL) {

     return EFI_OUT_OF_RESOURCES;

@@ -414,90 +456,27 @@ EbcCreateThunks (
   *Thunk = (VOID *) Ptr;

 

   //

-  // Add a magic code here to help the VM recognize the thunk..

-  // mov rax, ca112ebccall2ebch  => 48 B8 BC 2E 11 CA BC 2E 11 CA

-  //

-  *Ptr = 0x48;

-  Ptr++;

-  Size--;

-  *Ptr = 0xB8;

-  Ptr++;

-  Size--;

-  Addr = (UINT64) 0xCA112EBCCA112EBCULL;

-  for (Index = 0; Index < sizeof (Addr); Index++) {

-    *Ptr = (UINT8) (UINTN) Addr;

-    Addr >>= 8;

-    Ptr++;

-    Size--;

-  }

-

+  // Copy whole thunk instruction buffer template

   //

-  // Add code bytes to load up a processor register with the EBC entry point.

-  // mov r10, 123456789abcdef0h  => 49 BA F0 DE BC 9A 78 56 34 12

-  // The first 8 bytes of the thunk entry is the address of the EBC

-  // entry point.

-  //

-  *Ptr = 0x49;

-  Ptr++;

-  Size--;

-  *Ptr = 0xBA;

-  Ptr++;

-  Size--;

-  Addr = (UINT64) EbcEntryPoint;

-  for (Index = 0; Index < sizeof (Addr); Index++) {

-    *Ptr = (UINT8) (UINTN) Addr;

-    Addr >>= 8;

-    Ptr++;

-    Size--;

-  }

+  CopyMem (Ptr, mInstructionBufferTemplate, sizeof(mInstructionBufferTemplate));

 

   //

-  // Stick in a load of ecx with the address of appropriate VM function.

-  // Using r11 because it's a volatile register and won't be used in this

-  // point.

-  // mov r11 123456789abcdef0h  => 49 BB F0 DE BC 9A 78 56 34 12

+  // Patch EbcEntryPoint and EbcLLEbcInterpret

   //

-  if ((Flags & FLAG_THUNK_ENTRY_POINT) != 0) {

-    Addr = (UINTN) EbcLLExecuteEbcImageEntryPoint;

-  } else {

-    Addr = (UINTN) EbcLLEbcInterpret;

+  for (Index = 0; Index < sizeof(mInstructionBufferTemplate) - sizeof(UINTN); Index++) {

+    if (*(UINTN *)&Ptr[Index] == EBC_ENTRYPOINT_SIGNATURE) {

+      *(UINTN *)&Ptr[Index] = (UINTN)EbcEntryPoint;

+    }

+    if (*(UINTN *)&Ptr[Index] == EBC_LL_EBC_ENTRYPOINT_SIGNATURE) {

+      if ((Flags & FLAG_THUNK_ENTRY_POINT) != 0) {

+        *(UINTN *)&Ptr[Index] = (UINTN)EbcLLExecuteEbcImageEntryPoint;

+      } else {

+        *(UINTN *)&Ptr[Index] = (UINTN)EbcLLEbcInterpret;

+      }

+    }

   }

 

   //

-  // mov r11 Addr => 0x49 0xBB

-  //

-  *Ptr = 0x49;

-  Ptr++;

-  Size--;

-  *Ptr = 0xBB;

-  Ptr++;

-  Size--;

-  for (Index = 0; Index < sizeof (Addr); Index++) {

-    *Ptr = (UINT8) Addr;

-    Addr >>= 8;

-    Ptr++;

-    Size--;

-  }

-  //

-  // Stick in jump opcode bytes for jmp r11 => 0x41 0xFF 0xE3

-  //

-  *Ptr = 0x41;

-  Ptr++;

-  Size--;

-  *Ptr = 0xFF;

-  Ptr++;

-  Size--;

-  *Ptr = 0xE3;

-  Size--;

-

-  //

-  // Double check that our defined size is ok (application error)

-  //

-  if (Size < 0) {

-    ASSERT (FALSE);

-    return EFI_BUFFER_TOO_SMALL;

-  }

-  //

   // Add the thunk to the list for this image. Do this last since the add

   // function flushes the cache for us.

   //

@@ -533,65 +512,37 @@ EbcLLCALLEX (
 {

   UINTN    IsThunk;

   UINTN    TargetEbcAddr;

+  UINT8    InstructionBuffer[sizeof(mInstructionBufferTemplate)];

+  UINTN    Index;

+  UINTN    IndexOfEbcEntrypoint;

 

   IsThunk       = 1;

   TargetEbcAddr = 0;

+  IndexOfEbcEntrypoint = 0;

 

   //

   // Processor specific code to check whether the callee is a thunk to EBC.

   //

-  if (*((UINT8 *)FuncAddr) != 0x48) {

-    IsThunk = 0;

-    goto Action;

-  }

-  if (*((UINT8 *)FuncAddr + 1) != 0xB8) {

-    IsThunk = 0;

-    goto Action;

-  }

-  if (*((UINT8 *)FuncAddr + 2) != 0xBC)  {

-    IsThunk = 0;

-    goto Action;

-  }

-  if (*((UINT8 *)FuncAddr + 3) != 0x2E)  {

-    IsThunk = 0;

-    goto Action;

-  }

-  if (*((UINT8 *)FuncAddr + 4) != 0x11)  {

-    IsThunk = 0;

-    goto Action;

-  }

-  if (*((UINT8 *)FuncAddr + 5) != 0xCA)  {

-    IsThunk = 0;

-    goto Action;

-  }

-  if (*((UINT8 *)FuncAddr + 6) != 0xBC)  {

-    IsThunk = 0;

-    goto Action;

-  }

-  if (*((UINT8 *)FuncAddr + 7) != 0x2E)  {

-    IsThunk = 0;

-    goto Action;

-  }

-  if (*((UINT8 *)FuncAddr + 8) != 0x11)  {

-    IsThunk = 0;

-    goto Action;

-  }

-  if (*((UINT8 *)FuncAddr + 9) != 0xCA)  {

-    IsThunk = 0;

-    goto Action;

-  }

-  if (*((UINT8 *)FuncAddr + 10) != 0x49)  {

-    IsThunk = 0;

-    goto Action;

+  CopyMem (InstructionBuffer, (VOID *)FuncAddr, sizeof(InstructionBuffer));

+  //

+  // Fill the signature according to mInstructionBufferTemplate

+  //

+  for (Index = 0; Index < sizeof(mInstructionBufferTemplate) - sizeof(UINTN); Index++) {

+    if (*(UINTN *)&mInstructionBufferTemplate[Index] == EBC_ENTRYPOINT_SIGNATURE) {

+      *(UINTN *)&InstructionBuffer[Index] = EBC_ENTRYPOINT_SIGNATURE;

+      IndexOfEbcEntrypoint = Index;

+    }

+    if (*(UINTN *)&mInstructionBufferTemplate[Index] == EBC_LL_EBC_ENTRYPOINT_SIGNATURE) {

+      *(UINTN *)&InstructionBuffer[Index] = EBC_LL_EBC_ENTRYPOINT_SIGNATURE;

+    }

   }

-  if (*((UINT8 *)FuncAddr + 11) != 0xBA)  {

+  //

+  // Check if we need thunk to native

+  //

+  if (CompareMem (InstructionBuffer, mInstructionBufferTemplate, sizeof(mInstructionBufferTemplate)) != 0) {

     IsThunk = 0;

-    goto Action;

   }

 

-  CopyMem (&TargetEbcAddr, (UINT8 *)FuncAddr + 12, 8);

-

-Action:

   if (IsThunk == 1){

     //

     // The callee is a thunk to EBC, adjust the stack pointer down 16 bytes and

@@ -602,8 +553,9 @@ Action:
     VmWriteMemN (VmPtr, (UINTN) VmPtr->Gpr[0], (UINTN) FramePtr);

     VmPtr->FramePtr = (VOID *) (UINTN) VmPtr->Gpr[0];

     VmPtr->Gpr[0] -= 8;

-    VmWriteMem64 (VmPtr, (UINTN) VmPtr->Gpr[0], (UINT64) (VmPtr->Ip + Size));

+    VmWriteMem64 (VmPtr, (UINTN) VmPtr->Gpr[0], (UINT64) (UINTN) (VmPtr->Ip + Size));

 

+    CopyMem (&TargetEbcAddr, (UINT8 *)FuncAddr + IndexOfEbcEntrypoint, sizeof(UINTN));

     VmPtr->Ip = (VMIP) (UINTN) TargetEbcAddr;

   } else {

     //