mirror of https://github.com/acidanthera/audk.git
52 lines
1.4 KiB
NASM
52 lines
1.4 KiB
NASM
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;------------------------------------------------------------------------------
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;
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; Copyright (c) 2010, Intel Corporation
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; All rights reserved. This program and the accompanying materials
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; are licensed and made available under the terms and conditions of the BSD License
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; which accompanies this distribution. The full text of the license may be found at
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; http://opensource.org/licenses/bsd-license.php
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;
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; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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;
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; Module Name:
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;
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; PageFaultHandler.asm
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;
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; Abstract:
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;
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; Defines page fault handler used to hook SMM IDT
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;
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;------------------------------------------------------------------------------
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mOriginalHandler PROTO
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PageFaultHandler PROTO
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.code
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PageFaultHandlerHook PROC
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push rax ; save all volatile registers
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push rcx
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push rdx
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push r8
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push r9
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push r10
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push r11
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add rsp, -20h
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call PageFaultHandler
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add rsp, 20h
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test rax, rax
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pop r11
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pop r10
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pop r9
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pop r8
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pop rdx
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pop rcx
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pop rax ; restore all volatile registers
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jnz @F
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jmp mOriginalHandler
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@@:
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add rsp, 08h ; skip error code for PF
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iretq
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PageFaultHandlerHook ENDP
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END
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