diff options
Diffstat (limited to 'UefiCpuPkg/Library/CpuExceptionHandlerLib/X64/ExceptionHandlerAsm.asm')
| -rw-r--r-- | UefiCpuPkg/Library/CpuExceptionHandlerLib/X64/ExceptionHandlerAsm.asm | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/UefiCpuPkg/Library/CpuExceptionHandlerLib/X64/ExceptionHandlerAsm.asm b/UefiCpuPkg/Library/CpuExceptionHandlerLib/X64/ExceptionHandlerAsm.asm index f348efe4b..59bec5985 100644 --- a/UefiCpuPkg/Library/CpuExceptionHandlerLib/X64/ExceptionHandlerAsm.asm +++ b/UefiCpuPkg/Library/CpuExceptionHandlerLib/X64/ExceptionHandlerAsm.asm @@ -1,5 +1,5 @@ ;------------------------------------------------------------------------------ ;
-; Copyright (c) 2012 - 2013, Intel Corporation. All rights reserved.<BR>
+; Copyright (c) 2012 - 2014, 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
@@ -53,12 +53,12 @@ HookAfterStubHeaderBegin: jmp rax
HookAfterStubHeaderEnd:
mov rax, rsp
- sub rsp, 8h
- and sp, 0fff0h
+ and sp, 0fff0h ; make sure 16-byte aligned for exception context
+ sub rsp, 18h ; reserve room for filling exception data later
push rcx
mov rcx, [rax + 8]
bt mErrorCodeFlag, ecx
- jc @F
+ jnc @F
push [rsp] ; push additional rcx to make stack alignment
@@:
xchg rcx, [rsp] ; restore rcx, save Exception Number in stack
|