1 ;------------------------------------------------------------------------------ 2 ; 3 ; Copyright (c) 2006, Intel Corporation. All rights reserved.<BR> 4 ; This program and the accompanying materials 5 ; are licensed and made available under the terms and conditions of the BSD License 6 ; which accompanies this distribution. The full text of the license may be found at 7 ; http://opensource.org/licenses/bsd-license.php. 8 ; 9 ; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 10 ; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 11 ; 12 ; Module Name: 13 ; 14 ; DisablePaging32.Asm 15 ; 16 ; Abstract: 17 ; 18 ; AsmDisablePaging32 function 19 ; 20 ; Notes: 21 ; 22 ;------------------------------------------------------------------------------ 23 24 SECTION .text 25 26 ;------------------------------------------------------------------------------ 27 ; VOID 28 ; EFIAPI 29 ; InternalX86DisablePaging32 ( 30 ; IN SWITCH_STACK_ENTRY_POINT EntryPoint, 31 ; IN VOID *Context1, OPTIONAL 32 ; IN VOID *Context2, OPTIONAL 33 ; IN VOID *NewStack 34 ; ); 35 ;------------------------------------------------------------------------------ 36 global ASM_PFX(InternalX86DisablePaging32) 37 ASM_PFX(InternalX86DisablePaging32): 38 mov ebx, [esp + 4] 39 mov ecx, [esp + 8] 40 mov edx, [esp + 12] 41 pushfd 42 pop edi ; save EFLAGS to edi 43 cli 44 mov eax, cr0 45 btr eax, 31 46 mov esp, [esp + 16] 47 mov cr0, eax 48 push edi 49 popfd ; restore EFLAGS from edi 50 push edx 51 push ecx 52 call ebx 53 jmp $ ; EntryPoint() should not return 54 55
