diff options
Diffstat (limited to 'EdkCompatibilityPkg/Compatibility/SmmBaseHelper/X64/PageFaultHandler.asm')
| -rw-r--r-- | EdkCompatibilityPkg/Compatibility/SmmBaseHelper/X64/PageFaultHandler.asm | 140 |
1 files changed, 70 insertions, 70 deletions
diff --git a/EdkCompatibilityPkg/Compatibility/SmmBaseHelper/X64/PageFaultHandler.asm b/EdkCompatibilityPkg/Compatibility/SmmBaseHelper/X64/PageFaultHandler.asm index d58a04bcf..ed0d7f7c2 100644 --- a/EdkCompatibilityPkg/Compatibility/SmmBaseHelper/X64/PageFaultHandler.asm +++ b/EdkCompatibilityPkg/Compatibility/SmmBaseHelper/X64/PageFaultHandler.asm @@ -1,70 +1,70 @@ -;------------------------------------------------------------------------------ -; -; Copyright (c) 2010 - 2012, 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 -; http://opensource.org/licenses/bsd-license.php -; -; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, -; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. -; -; Module Name: -; -; PageFaultHandler.asm -; -; Abstract: -; -; Defines page fault handler used to hook SMM IDT -; -;------------------------------------------------------------------------------ - -EXTERN mOriginalHandler:QWORD -EXTERN PageFaultHandler:PROC - - .code - -PageFaultHandlerHook PROC - push rax ; save all volatile registers - push rcx - push rdx - push r8 - push r9 - push r10 - push r11 - - add rsp, -10h * 6 - 8 ; reserve memory to store XMM registers and make address 16-byte alignment - movdqa [rsp], xmm0 - movdqa [rsp + 10h], xmm1 - movdqa [rsp + 20h], xmm2 - movdqa [rsp + 30h], xmm3 - movdqa [rsp + 40h], xmm4 - movdqa [rsp + 50h], xmm5 - - add rsp, -20h - call PageFaultHandler - add rsp, 20h - - movdqa xmm0, [rsp] - movdqa xmm1, [rsp + 10h] - movdqa xmm2, [rsp + 20h] - movdqa xmm3, [rsp + 30h] - movdqa xmm4, [rsp + 40h] - movdqa xmm5, [rsp + 50h] - add rsp, 10h * 6 + 8 - - test al, al ; set ZF flag - pop r11 - pop r10 - pop r9 - pop r8 - pop rdx - pop rcx - pop rax ; restore all volatile registers - jnz @F ; check ZF flag - jmp mOriginalHandler -@@: - add rsp, 08h ; skip error code for PF - iretq -PageFaultHandlerHook ENDP - END +;------------------------------------------------------------------------------
+;
+; Copyright (c) 2010 - 2012, 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
+; http://opensource.org/licenses/bsd-license.php
+;
+; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+;
+; Module Name:
+;
+; PageFaultHandler.asm
+;
+; Abstract:
+;
+; Defines page fault handler used to hook SMM IDT
+;
+;------------------------------------------------------------------------------
+
+EXTERN mOriginalHandler:QWORD
+EXTERN PageFaultHandler:PROC
+
+ .code
+
+PageFaultHandlerHook PROC
+ push rax ; save all volatile registers
+ push rcx
+ push rdx
+ push r8
+ push r9
+ push r10
+ push r11
+
+ add rsp, -10h * 6 - 8 ; reserve memory to store XMM registers and make address 16-byte alignment
+ movdqa [rsp], xmm0
+ movdqa [rsp + 10h], xmm1
+ movdqa [rsp + 20h], xmm2
+ movdqa [rsp + 30h], xmm3
+ movdqa [rsp + 40h], xmm4
+ movdqa [rsp + 50h], xmm5
+
+ add rsp, -20h
+ call PageFaultHandler
+ add rsp, 20h
+
+ movdqa xmm0, [rsp]
+ movdqa xmm1, [rsp + 10h]
+ movdqa xmm2, [rsp + 20h]
+ movdqa xmm3, [rsp + 30h]
+ movdqa xmm4, [rsp + 40h]
+ movdqa xmm5, [rsp + 50h]
+ add rsp, 10h * 6 + 8
+
+ test al, al ; set ZF flag
+ pop r11
+ pop r10
+ pop r9
+ pop r8
+ pop rdx
+ pop rcx
+ pop rax ; restore all volatile registers
+ jnz @F ; check ZF flag
+ jmp mOriginalHandler
+@@:
+ add rsp, 08h ; skip error code for PF
+ iretq
+PageFaultHandlerHook ENDP
+ END
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