1. add public functions header.
2. apply for doxgen format for file header. git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@5043 6f19259b-4bc3-4df7-8a09-765794883524
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@@ -1,31 +1,20 @@
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;/** @file
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; This code provides low level routines that support the Virtual Machine
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; for option ROMs.
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;
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; Copyright (c) 2006 - 2008, Intel Corporation. <BR>
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; All rights reserved. This program and the accompanying materials
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; are licensed and made available under the terms and conditions of the BSD License
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; which accompanies this distribution. The full text of the license may be found at
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; http://opensource.org/licenses/bsd-license.php
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;
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; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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;
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;**/
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page ,132
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title VM ASSEMBLY LANGUAGE ROUTINES
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;****************************************************************************
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;*
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;* Copyright (c) 2006 - 2007, Intel Corporation
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;* All rights reserved. This program and the accompanying materials
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;* are licensed and made available under the terms and conditions of the BSD License
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;* which accompanies this distribution. The full text of the license may be found at
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;* http://opensource.org/licenses/bsd-license.php
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;*
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;* THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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;* WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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;*
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;****************************************************************************
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;****************************************************************************
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; REV 1.0
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;****************************************************************************
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;
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; Rev Date Description
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; --- -------- ------------------------------------------------------------
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; 1.0 03/14/01 Initial creation of file.
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;
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;****************************************************************************
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;* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
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; This code provides low level routines that support the Virtual Machine
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; for option ROMs.
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;* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
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;---------------------------------------------------------------------------
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; Equate files needed.
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@@ -40,8 +29,8 @@
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;---------------------------------------------------------------------------
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.686p
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.model flat
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.code
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.model flat
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.code
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;---------------------------------------------------------------------------
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;;GenericPostSegment SEGMENT USE16
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;---------------------------------------------------------------------------
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@@ -51,9 +40,9 @@ CopyMem PROTO C Destination:PTR DWORD, Source:PTR DWORD, Count:DWORD
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; EbcLLCALLEXNative
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;
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; This function is called to execute an EBC CALLEX instruction
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; to native code.
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; to native code.
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; This instruction requires that we thunk out to external native
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; code. For IA32, we simply switch stacks and jump to the
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; code. For IA32, we simply switch stacks and jump to the
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; specified function. On return, we restore the stack pointer
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; to its original location.
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;
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@@ -64,17 +53,17 @@ _EbcLLCALLEXNative PROC NEAR PUBLIC
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push ebp
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push ebx
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mov ebp, esp ; standard function prolog
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; Get function address in a register
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; mov ecx, FuncAddr => mov ecx, dword ptr [FuncAddr]
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mov ecx, dword ptr [esp]+0Ch
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; Set stack pointer to new value
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; mov eax, NewStackPointer => mov eax, dword ptr [NewSp]
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mov eax, dword ptr [esp] + 14h
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mov edx, dword ptr [esp] + 10h
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sub eax, edx
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sub esp, eax
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sub esp, eax
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mov ebx, esp
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push ecx
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push eax
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@@ -88,7 +77,7 @@ _EbcLLCALLEXNative PROC NEAR PUBLIC
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; Now call the external routine
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call ecx
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; ebp is preserved by the callee. In this function it
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; equals the original esp, so set them equal
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mov esp, ebp
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@@ -105,7 +94,7 @@ _EbcLLCALLEXNative ENDP
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; Routine Description:
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; The VM thunk code stuffs an EBC entry point into a processor
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; register. Since we can't use inline assembly to get it from
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; the interpreter C code, stuff it into the return value
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; the interpreter C code, stuff it into the return value
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; register and return.
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;
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; Arguments:
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@@ -121,7 +110,7 @@ _EbcLLGetEbcEntryPoint ENDP
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;/*++
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;
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;Routine Description:
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;
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;
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; Return the caller's value of the stack pointer.
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;
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;Arguments:
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@@ -136,7 +125,7 @@ _EbcLLGetEbcEntryPoint ENDP
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;
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;--*/
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; UINTN EbcLLGetStackPointer()
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; UINTN EbcLLGetStackPointer()
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_EbcLLGetStackPointer PROC NEAR PUBLIC
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mov eax, esp ; get current stack pointer
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add eax, 4 ; stack adjusted by this much when we were called
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