blob: 72cbf4b87494ffba3228ce9f44314318a5cf39e0 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
|
#------------------------------------------------------------------------------
#
# Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
# 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.
#
# Module Name:
#
# DisablePaging32.S
#
# Abstract:
#
# InternalX86DisablePaging32 function
#
# Notes:
#
#------------------------------------------------------------------------------
ASM_GLOBAL ASM_PFX(InternalX86DisablePaging32)
#------------------------------------------------------------------------------
# VOID
# EFIAPI
# InternalX86DisablePaging32 (
# IN SWITCH_STACK_ENTRY_POINT EntryPoint,
# IN VOID *Context1, OPTIONAL
# IN VOID *Context2, OPTIONAL
# IN VOID *NewStack
# );
#------------------------------------------------------------------------------
ASM_PFX(InternalX86DisablePaging32):
movl 4(%esp), %ebx
movl 8(%esp), %ecx
movl 12(%esp), %edx
pushfl
pop %edi # save EFLAGS to edi
cli
movl %cr0, %eax
btrl $31, %eax
movl 16(%esp), %esp
movl %eax, %cr0
push %edi
popfl # restore EFLAGS from edi
push %edx
push %ecx
call *%ebx
jmp . # EntryPoint() should not return
|
