23086ba84c
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@1567 6f19259b-4bc3-4df7-8a09-765794883524
50 lines
1.4 KiB
C
50 lines
1.4 KiB
C
/** @file
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AsmDisablePaging32 function.
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Copyright (c) 2006, 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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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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#if _MSC_EXTENSIONS
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__declspec (naked)
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VOID
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EFIAPI
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InternalX86DisablePaging32 (
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IN SWITCH_STACK_ENTRY_POINT EntryPoint,
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IN VOID *Context1, OPTIONAL
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IN VOID *Context2, OPTIONAL
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IN VOID *NewStack
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)
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{
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_asm {
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push ebp
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mov ebp, esp
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mov ebx, EntryPoint
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mov ecx, Context1
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mov edx, Context2
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pushfd
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pop edi // save EFLAGS to edi
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cli
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mov eax, cr0
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btr eax, 31
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mov esp, NewStack
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mov cr0, eax
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push edi
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popfd // restore EFLAGS from edi
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push edx
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push ecx
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call ebx
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jmp $ // EntryPoint() should not return
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}
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}
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#endif
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