Add EBC, FTW, Crc32SectionExtract, NullMemoryTest modules.

CrcSectionExtract cannot build for now for some missing definitions. 

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@2813 6f19259b-4bc3-4df7-8a09-765794883524

MdeModulePkg/Universal/Ebc/Dxe/Ia32/EbcLowLevel.asm

@@ -0,0 +1,163 @@
+  page    ,132
+  title   VM ASSEMBLY LANGUAGE ROUTINES
+;****************************************************************************
+;*                                                                         
+;*  Copyright (c) 2006 - 2007, Intel Corporation                                                         
+;*  All rights reserved. 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        
+;*  http://opensource.org/licenses/bsd-license.php                                            
+;*                                                                                            
+;*  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,                     
+;*  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.             
+;*                                                                          
+;****************************************************************************
+;****************************************************************************
+;                                   REV 1.0
+;****************************************************************************
+;
+; Rev  Date      Description
+; ---  --------  ------------------------------------------------------------
+; 1.0  03/14/01  Initial creation of file.
+;
+;****************************************************************************
+                             
+;* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+; This code provides low level routines that support the Virtual Machine
+; for option ROMs. 
+;* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+
+;---------------------------------------------------------------------------
+; Equate files needed.
+;---------------------------------------------------------------------------
+
+.XLIST
+
+.LIST
+
+;---------------------------------------------------------------------------
+; Assembler options
+;---------------------------------------------------------------------------
+
+.686p
+.model  flat        
+.code        
+;---------------------------------------------------------------------------
+;;GenericPostSegment      SEGMENT USE16
+;---------------------------------------------------------------------------
+CopyMem  PROTO  C Destination:PTR DWORD, Source:PTR DWORD, Count:DWORD
+
+;****************************************************************************
+; EbcLLCALLEXNative
+;
+; This function is called to execute an EBC CALLEX instruction
+; to native code. 
+; This instruction requires that we thunk out to external native
+; code. For IA32, we simply switch stacks and jump to the 
+; specified function. On return, we restore the stack pointer
+; to its original location.
+;
+; Destroys no working registers.
+;****************************************************************************
+; VOID EbcLLCALLEXNative(UINTN FuncAddr, UINTN NewStackPointer, VOID *FramePtr)
+_EbcLLCALLEXNative        PROC    NEAR    PUBLIC
+      push   ebp
+      push   ebx
+      mov    ebp, esp              ; standard function prolog
+      
+      ; Get function address in a register
+      ; mov ecx, FuncAddr => mov ecx, dword ptr [FuncAddr]
+      mov    ecx, dword ptr [esp]+0Ch
+      
+      ; Set stack pointer to new value
+      ; mov eax, NewStackPointer => mov eax, dword ptr [NewSp]
+      mov    eax, dword ptr [esp] + 14h
+      mov    edx, dword ptr [esp] + 10h
+      sub    eax, edx
+      sub    esp, eax      
+      mov    ebx, esp
+      push   ecx
+      push   eax
+      push   edx
+      push   ebx
+      call   CopyMem
+      pop    eax
+      pop    eax
+      pop    eax
+      pop    ecx
+
+      ; Now call the external routine
+      call  ecx
+      
+      ; ebp is preserved by the callee. In this function it
+      ; equals the original esp, so set them equal
+      mov    esp, ebp
+
+      ; Standard function epilog
+      mov      esp, ebp
+      pop      ebx
+      pop      ebp
+      ret
+_EbcLLCALLEXNative    ENDP
+
+
+; UINTN EbcLLGetEbcEntryPoint(VOID);
+; Routine Description:
+;   The VM thunk code stuffs an EBC entry point into a processor
+;   register. Since we can't use inline assembly to get it from
+;   the interpreter C code, stuff it into the return value 
+;   register and return.
+;
+; Arguments:
+;     None.
+;
+; Returns:
+;     The contents of the register in which the entry point is passed.
+;
+_EbcLLGetEbcEntryPoint        PROC    NEAR    PUBLIC
+    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    NEAR    PUBLIC
+    mov    eax, esp      ; get current stack pointer
+    add   eax, 4        ; stack adjusted by this much when we were called
+    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    NEAR    PUBLIC
+    ret
+_EbcLLGetReturnValue    ENDP
+
+END