Disable interrupt when changing IDTR register.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@10046 6f19259b-4bc3-4df7-8a09-765794883524

3 files changed, 12 insertions, 3 deletions

diff --git a/MdePkg/Library/BaseLib/Ia32/WriteIdtr.S b/MdePkg/Library/BaseLib/Ia32/WriteIdtr.S
index 1f4857e..e9fc03b 100644
--- a/MdePkg/Library/BaseLib/Ia32/WriteIdtr.S
+++ b/MdePkg/Library/BaseLib/Ia32/WriteIdtr.S
@@ -1,6 +1,6 @@
 #------------------------------------------------------------------------------

 #

-# Copyright (c) 2006 - 2008, Intel Corporation

+# Copyright (c) 2006 - 2010, Intel Corporation

 # 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

@@ -31,5 +31,8 @@
 ASM_GLOBAL ASM_PFX(InternalX86WriteIdtr)

 ASM_PFX(InternalX86WriteIdtr):

     movl    4(%esp), %eax

+    pushfl

+    cli

     lidt    (%eax)

+    popfl

     ret

diff --git a/MdePkg/Library/BaseLib/Ia32/WriteIdtr.asm b/MdePkg/Library/BaseLib/Ia32/WriteIdtr.asm
index 65fca40..76c3f13 100644
--- a/MdePkg/Library/BaseLib/Ia32/WriteIdtr.asm
+++ b/MdePkg/Library/BaseLib/Ia32/WriteIdtr.asm
@@ -1,6 +1,6 @@
 ;------------------------------------------------------------------------------

 ;

-; Copyright (c) 2006, Intel Corporation

+; Copyright (c) 2006 - 2010, Intel Corporation

 ; 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

@@ -34,7 +34,10 @@
 ;------------------------------------------------------------------------------

 InternalX86WriteIdtr  PROC

     mov     eax, [esp + 4]

+    pushfd

+    cli

     lidt    fword ptr [eax]

+    popfd

     ret

 InternalX86WriteIdtr  ENDP

 

diff --git a/MdePkg/Library/BaseLib/Ia32/WriteIdtr.c b/MdePkg/Library/BaseLib/Ia32/WriteIdtr.c
index 33d2b29..d58520f 100644
--- a/MdePkg/Library/BaseLib/Ia32/WriteIdtr.c
+++ b/MdePkg/Library/BaseLib/Ia32/WriteIdtr.c
@@ -1,7 +1,7 @@
 /** @file

   AsmWriteIdtr function

 

-  Copyright (c) 2006 - 2008, Intel Corporation<BR>

+  Copyright (c) 2006 - 2010, 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

@@ -32,7 +32,10 @@ InternalX86WriteIdtr (
 {

   _asm {

     mov     eax, Idtr

+    pushfd

+    cli

     lidt    fword ptr [eax]

+    popfd

   }

 }