diff options
Diffstat (limited to 'EdkCompatibilityPkg/Compatibility/SmmBaseHelper/X64/PageFaultHandler.asm')
| -rw-r--r-- | EdkCompatibilityPkg/Compatibility/SmmBaseHelper/X64/PageFaultHandler.asm | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/EdkCompatibilityPkg/Compatibility/SmmBaseHelper/X64/PageFaultHandler.asm b/EdkCompatibilityPkg/Compatibility/SmmBaseHelper/X64/PageFaultHandler.asm new file mode 100644 index 0000000000..66f629a19f --- /dev/null +++ b/EdkCompatibilityPkg/Compatibility/SmmBaseHelper/X64/PageFaultHandler.asm @@ -0,0 +1,52 @@ +;------------------------------------------------------------------------------ +; +; Copyright (c) 2010, Intel Corporation +; All rights reserved. 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 +; +;------------------------------------------------------------------------------ + +mOriginalHandler PROTO +PageFaultHandler PROTO + + .code + +PageFaultHandlerHook PROC + push rax ; save all volatile registers + push rcx + push rdx + push r8 + push r9 + push r10 + push r11 + add rsp, -20h + call PageFaultHandler + add rsp, 20h + test rax, rax + pop r11 + pop r10 + pop r9 + pop r8 + pop rdx + pop rcx + pop rax ; restore all volatile registers + jnz @F + jmp mOriginalHandler +@@: + add rsp, 08h ; skip error code for PF + iretq +PageFaultHandlerHook ENDP + END
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