1) Fix GCC version EBC interpreter bug.

Add missing EFIPAI for EbcInterpret and ExecuteEbcImageEntryPoint().
	Get return value in EbcLLCALLEXNative(), remove EbcLLGetReturnValue().

2) Fix IA32 EBC interpreter bug on MOVsnw and MOVsnd.

3) Some cleanup
	Add missing ReturnEBCStack() for IA32 build.
	Remove unnecessary EbcLLGetStackPointer() for X64 and IPF build.
	Remove deadcode EbcLLGetStackPointer() and EbcLLGetReturnValue() in IA32/X64/IPF ASM code.
	Dump more info in CommonEbcExceptionHandler().

Signed-off-by: jyao1
Reviewed-by: Elvinli

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12745 6f19259b-4bc3-4df7-8a09-765794883524

MdeModulePkg/Universal/EbcDxe/X64/EbcLowLevel.asm

@@ -3,7 +3,7 @@
 ;    This code provides low level routines that support the Virtual Machine.
 ;    for option ROMs.
 ;  
-;  Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
+;  Copyright (c) 2006 - 2011, Intel Corporation. All rights reserved.<BR>
 ;  This program and the accompanying materials
 ;  are licensed and made available under the terms and conditions of the BSD License
 ;  which accompanies this distribution.  The full text of the license may be found at
@@ -21,11 +21,9 @@
 ; Equate files needed.
 ;---------------------------------------------------------------------------
 
-text SEGMENT
+.CODE
 
-;---------------------------------------------------------------------------
-;;GenericPostSegment      SEGMENT USE16
-;---------------------------------------------------------------------------
+CopyMem  PROTO  Destination:PTR DWORD, Source:PTR DWORD, Count:DWORD
 
 ;****************************************************************************
 ; EbcLLCALLEX
@@ -38,11 +36,7 @@ text SEGMENT
 ;
 ; Destroys no working registers.
 ;****************************************************************************
-; VOID EbcLLCALLEXNative(UINTN FuncAddr, UINTN NewStackPointer, VOID *FramePtr)
-
-CopyMem  PROTO  Destination:PTR DWORD, Source:PTR DWORD, Count:DWORD
-
-
+; INT64 EbcLLCALLEXNative(UINTN FuncAddr, UINTN NewStackPointer, VOID *FramePtr)
 EbcLLCALLEXNative        PROC    PUBLIC
       push   rbp
       push   rbx
@@ -92,54 +86,10 @@ EbcLLCALLEXNative    ENDP
 ;     The contents of the register in which the entry point is passed.
 ;
 EbcLLGetEbcEntryPoint        PROC    PUBLIC
+    ; The EbcEntryPoint is saved to R10.
     mov  rax, r10
     ret
 EbcLLGetEbcEntryPoint    ENDP
 
-;/*++
-;
-;Routine Description:
-;
-;  Return the caller's value of the stack pointer.
-;
-;Arguments:
-;
-;  None.
-;
-;Returns:
-;
-;  The current value of the stack pointer for the caller. We
-;  adjust it by 4 here because when they called us, the return address
-;  is put on the stack, thereby lowering it by 4 bytes.
-;
-;--*/
-
-; UINTN EbcLLGetStackPointer()
-EbcLLGetStackPointer        PROC    PUBLIC
-    mov    rax, rsp      ; get current stack pointer
-    ; Stack adjusted by this much when we were called,
-    ; For this function, it's 4.
-    add   rax, 4
-    ret
-EbcLLGetStackPointer    ENDP
-
-; UINT64 EbcLLGetReturnValue(VOID);
-; Routine Description:
-;   When EBC calls native, on return the VM has to stuff the return
-;   value into a VM register. It's assumed here that the value is still
-;    in the register, so simply return and the caller should get the
-;   return result properly.
-;
-; Arguments:
-;     None.
-;
-; Returns:
-;     The unmodified value returned by the native code.
-;
-EbcLLGetReturnValue   PROC    PUBLIC
-    ret
-EbcLLGetReturnValue    ENDP
-
-text  ENDS
 END