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/** @file
AsmDisablePaging32 function.
Copyright (c) 2006 - 2007, Intel Corporation<BR>
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.
**/
//
// Include common header file for this module.
//
#include <BaseLibInternals.h>
#if _MSC_EXTENSIONS
__declspec (naked)
VOID
EFIAPI
InternalX86DisablePaging32 (
IN SWITCH_STACK_ENTRY_POINT EntryPoint,
IN VOID *Context1, OPTIONAL
IN VOID *Context2, OPTIONAL
IN VOID *NewStack
)
{
_asm {
push ebp
mov ebp, esp
mov ebx, EntryPoint
mov ecx, Context1
mov edx, Context2
pushfd
pop edi // save EFLAGS to edi
cli
mov eax, cr0
btr eax, 31
mov esp, NewStack
mov cr0, eax
push edi
popfd // restore EFLAGS from edi
push edx
push ecx
call ebx
jmp $ // EntryPoint() should not return
}
}
#endif
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