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 /UefiCpuPkg | |
| parent | e332b442b9d22b948956a681b0614708303c5976 (diff) | |
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 'UefiCpuPkg')
| -rw-r--r-- | UefiCpuPkg/CpuDxe/Ia32/CpuAsm.asm | 5 | ||||
| -rw-r--r-- | UefiCpuPkg/CpuDxe/X64/CpuAsm.asm | 5 |
2 files changed, 8 insertions, 2 deletions
diff --git a/UefiCpuPkg/CpuDxe/Ia32/CpuAsm.asm b/UefiCpuPkg/CpuDxe/Ia32/CpuAsm.asm index 68454bdec..a279e6ab5 100644 --- a/UefiCpuPkg/CpuDxe/Ia32/CpuAsm.asm +++ b/UefiCpuPkg/CpuDxe/Ia32/CpuAsm.asm @@ -1,7 +1,7 @@ TITLE CpuAsm.asm:
;------------------------------------------------------------------------------
;*
-;* 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
@@ -272,6 +272,9 @@ ErrorCodeAndVectorOnStack: mov edi, esp
db 0fh, 0aeh, 07h ;fxsave [edi]
+;; UEFI calling convention for IA32 requires that Direction flag in EFLAGs is clear
+ cld
+
;; UINT32 ExceptionData;
push dword ptr [ebp + 2 * 4]
diff --git a/UefiCpuPkg/CpuDxe/X64/CpuAsm.asm b/UefiCpuPkg/CpuDxe/X64/CpuAsm.asm index 79edb7b83..68fcd3f40 100644 --- a/UefiCpuPkg/CpuDxe/X64/CpuAsm.asm +++ b/UefiCpuPkg/CpuDxe/X64/CpuAsm.asm @@ -1,7 +1,7 @@ TITLE CpuAsm.asm:
;------------------------------------------------------------------------------
;*
-;* 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
@@ -223,6 +223,9 @@ NoErrorCode: mov rdi, rsp
db 0fh, 0aeh, 07h ;fxsave [rdi]
+;; UEFI calling convention for x64 requires that Direction flag in EFLAGs is clear
+ cld
+
;; UINT32 ExceptionData;
push qword ptr [rbp + 16]
|