SetIdtEntry.c File Reference

#include "ScriptExecute.h"

Go to the source code of this file.

Macros
#define	EXTRA_PAGE_TABLE_PAGES   8
#define	IA32_PG_P   BIT0
#define	IA32_PG_RW   BIT1
#define	IA32_PG_PS   BIT7

Functions
VOID EFIAPI	PageFaultHandlerHook (VOID)
VOID	HookPageFaultHandler (IN IA32_IDT_GATE_DESCRIPTOR *IdtEntry)
BOOLEAN	IsLongModeWakingVector (IN ACPI_S3_CONTEXT *AcpiS3Context)
VOID	SetIdtEntry (IN ACPI_S3_CONTEXT *AcpiS3Context)
VOID	AcquirePage (IN OUT UINT64 *Uplink)
BOOLEAN EFIAPI	PageFaultHandler (VOID)

Variables
UINT64	mPhyMask
VOID *	mOriginalHandler
UINTN	mPageFaultBuffer
UINTN	mPageFaultIndex = 0
UINT64 *	mPageFaultUplink [EXTRA_PAGE_TABLE_PAGES]

Detailed Description

Set a IDT entry for debug purpose

Set a IDT entry for interrupt vector 3 for debug purpose for x64 platform

Copyright (c) 2006 - 2022, Intel Corporation. All rights reserved.
Copyright (c) 2017, AMD Incorporated. All rights reserved.

SPDX-License-Identifier: BSD-2-Clause-Patent

Definition in file SetIdtEntry.c.

Macro Definition Documentation

EXTRA_PAGE_TABLE_PAGES

#define EXTRA_PAGE_TABLE_PAGES   8

Definition at line 18 of file SetIdtEntry.c.

IA32_PG_P

#define IA32_PG_P   BIT0

Definition at line 20 of file SetIdtEntry.c.

IA32_PG_PS

#define IA32_PG_PS   BIT7

Definition at line 22 of file SetIdtEntry.c.

IA32_PG_RW

#define IA32_PG_RW   BIT1

Definition at line 21 of file SetIdtEntry.c.

Function Documentation

AcquirePage()

VOID AcquirePage

(

IN OUT UINT64 *

Uplink

)

Acquire page for page fault.

Parameters

[in,out]

Uplink

Pointer to up page table entry.

Definition at line 194 of file SetIdtEntry.c.

HookPageFaultHandler()

VOID HookPageFaultHandler

(

IN IA32_IDT_GATE_DESCRIPTOR *

IdtEntry

)

Hook IDT with our page fault handler so that the on-demand paging works on page fault.

Parameters

IdtEntry

a pointer to IDT entry

Definition at line 50 of file SetIdtEntry.c.

IsLongModeWakingVector()

BOOLEAN IsLongModeWakingVector

(

IN ACPI_S3_CONTEXT *

AcpiS3Context

)

The function will check if current waking vector is long mode.

Parameters

AcpiS3Context

a pointer to a structure of ACPI_S3_CONTEXT

Return values

TRUE	Current context need long mode waking vector.
FALSE	Current context need not long mode waking vector.

Definition at line 100 of file SetIdtEntry.c.

PageFaultHandler()

BOOLEAN EFIAPI PageFaultHandler

(

VOID

)

The page fault handler that on-demand read >4G memory/MMIO.

Return values

TRUE	The page fault is correctly handled.
FALSE	The page fault is not handled and is passed through to original handler.

Definition at line 230 of file SetIdtEntry.c.

PageFaultHandlerHook()

VOID EFIAPI PageFaultHandlerHook

(

VOID

)

Page fault handler.

SetIdtEntry()

VOID SetIdtEntry

(

IN ACPI_S3_CONTEXT *

AcpiS3Context

)

Set a IDT entry for interrupt vector 3 for debug purpose.

Parameters

AcpiS3Context

a pointer to a structure of ACPI_S3_CONTEXT

Definition at line 137 of file SetIdtEntry.c.

Variable Documentation

mOriginalHandler

VOID* mOriginalHandler

Definition at line 25 of file SetIdtEntry.c.

mPageFaultBuffer

UINTN mPageFaultBuffer

Definition at line 26 of file SetIdtEntry.c.

mPageFaultIndex

UINTN mPageFaultIndex = 0

Definition at line 27 of file SetIdtEntry.c.

mPageFaultUplink

UINT64* mPageFaultUplink[EXTRA_PAGE_TABLE_PAGES]

Definition at line 31 of file SetIdtEntry.c.

mPhyMask

UINT64 mPhyMask

Definition at line 24 of file SetIdtEntry.c.