diff options
| author | rsun3 <rsun3@6f19259b-4bc3-4df7-8a09-765794883524> | 2011-05-16 06:10:42 +0000 |
|---|---|---|
| committer | rsun3 <rsun3@6f19259b-4bc3-4df7-8a09-765794883524> | 2011-05-16 06:10:42 +0000 |
| commit | ad8cbf7197f41cbca4ac101d58f72dcf05c13860 (patch) | |
| tree | 1207a737bf7cdf0a396db9044269ed8d2c45485f /MdeModulePkg/Universal | |
| parent | e332b442b9d22b948956a681b0614708303c5976 (diff) | |
| download | edk2-platforms-ad8cbf7197f41cbca4ac101d58f72dcf05c13860.tar.xz | |
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@11664 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'MdeModulePkg/Universal')
| -rw-r--r-- | MdeModulePkg/Universal/DebugSupportDxe/Ia32/AsmFuncs.asm | 5 | ||||
| -rw-r--r-- | MdeModulePkg/Universal/DebugSupportDxe/X64/AsmFuncs.asm | 5 |
2 files changed, 8 insertions, 2 deletions
diff --git a/MdeModulePkg/Universal/DebugSupportDxe/Ia32/AsmFuncs.asm b/MdeModulePkg/Universal/DebugSupportDxe/Ia32/AsmFuncs.asm index 80ee1824d6..32cbc31654 100644 --- a/MdeModulePkg/Universal/DebugSupportDxe/Ia32/AsmFuncs.asm +++ b/MdeModulePkg/Universal/DebugSupportDxe/Ia32/AsmFuncs.asm @@ -1,7 +1,7 @@ ;/** @file
; Low leve IA32 specific debug support functions.
;
-; Copyright (c) 2006, 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
@@ -363,6 +363,9 @@ CommonIdtEntry:: ; They MUST be. If they are not, a GP fault will occur.
FXSTOR_EDI
+;; UEFI calling convention for IA32 requires that Direction flag in EFLAGs is clear
+ cld
+
;; UINT32 ExceptionData;
mov eax, ExceptData
push eax
diff --git a/MdeModulePkg/Universal/DebugSupportDxe/X64/AsmFuncs.asm b/MdeModulePkg/Universal/DebugSupportDxe/X64/AsmFuncs.asm index b9c32dd277..bce49ef762 100644 --- a/MdeModulePkg/Universal/DebugSupportDxe/X64/AsmFuncs.asm +++ b/MdeModulePkg/Universal/DebugSupportDxe/X64/AsmFuncs.asm @@ -1,7 +1,7 @@ ;/** @file
; Low level x64 routines used by the debug support driver.
;
-; Copyright (c) 2007 - 2010, Intel Corporation. All rights reserved.<BR>
+; Copyright (c) 2007 - 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
@@ -393,6 +393,9 @@ ExtraPushDone: ; They MUST be. If they are not, a GP fault will occur.
FXSTOR_RDI
+;; UEFI calling convention for x64 requires that Direction flag in EFLAGs is clear
+ cld
+
;; UINT64 ExceptionData;
mov rax, ExceptData
push rax
|