From 24f7e42cb79297347013093b1b9665e672ae29d7 Mon Sep 17 00:00:00 2001
From: rsun3 <rsun3@6f19259b-4bc3-4df7-8a09-765794883524>
Date: Tue, 17 May 2011 08:35:20 +0000
Subject: A complement fix for revision 11664 to update GCC assembly files :
 clear the direction flag in interrupt/exception handlers' assembly entry code
 before calling C functions to follow the UEFI calling convention.

Signed-off-by: rsun3
Reviewed-by:  jyao1


git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11670 6f19259b-4bc3-4df7-8a09-765794883524
---
 UefiCpuPkg/CpuDxe/Ia32/CpuAsm.S | 5 ++++-
 UefiCpuPkg/CpuDxe/X64/CpuAsm.S  | 5 ++++-
 2 files changed, 8 insertions(+), 2 deletions(-)

(limited to 'UefiCpuPkg')

diff --git a/UefiCpuPkg/CpuDxe/Ia32/CpuAsm.S b/UefiCpuPkg/CpuDxe/Ia32/CpuAsm.S
index d3e1dee62..38f46ab33 100644
--- a/UefiCpuPkg/CpuDxe/Ia32/CpuAsm.S
+++ b/UefiCpuPkg/CpuDxe/Ia32/CpuAsm.S
@@ -1,6 +1,6 @@
 #------------------------------------------------------------------------------
 #*
-#*   Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>
+#*   Copyright (c) 2006 - 2011, 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
@@ -274,6 +274,9 @@ ErrorCodeAndVectorOnStack:
     movl    %esp, %edi
     .byte      0x0f, 0x0ae, 0x07 #fxsave [edi]
 
+#; UEFI calling convention for IA32 requires that Direction flag in EFLAGs is clear
+    cld
+
 #; UINT32  ExceptionData;
     pushl   8(%ebp)
 
diff --git a/UefiCpuPkg/CpuDxe/X64/CpuAsm.S b/UefiCpuPkg/CpuDxe/X64/CpuAsm.S
index 8f191320a..f1481d85d 100644
--- a/UefiCpuPkg/CpuDxe/X64/CpuAsm.S
+++ b/UefiCpuPkg/CpuDxe/X64/CpuAsm.S
@@ -2,7 +2,7 @@
 
 #------------------------------------------------------------------------------
 #*
-#*   Copyright (c) 2008 - 2010, Intel Corporation. All rights reserved.<BR>
+#*   Copyright (c) 2008 - 2011, 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
@@ -234,6 +234,9 @@ CommonInterruptEntry_al_0000:
     movq    %rsp, %rdi
     .byte 0x0f, 0x0ae, 0x07 #fxsave [rdi]
 
+#; UEFI calling convention for x64 requires that Direction flag in EFLAGs is clear
+    cld
+
 #; UINT32  ExceptionData;
     pushq   16(%rbp)
 
-- 
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