lixfastread.c File Reference

#include "introcore.h"
#include "guests.h"
#include "introstatus.h"
#include "lixguest.h"

Go to the source code of this file.

Functions
INTSTATUS	IntLixFsrInitMap (QWORD Gva)
	Initialize the fast read mechanism. More...
void	IntLixFsrUninitMap (void)
	Uninitialize the fast read mechanism. More...
INTSTATUS	IntLixFsrRead (QWORD Gva, DWORD Offset, DWORD Size, void *Buffer)
	Performs a read from a previously mapped guest virtual address. More...

Variables
static QWORD	gMappedGva = 0
	The guest virtual address that is currently mapped. More...
static BYTE *	gMapping1 = NULL
	The mapping point of the first page mapped. More...
static BYTE *	gMapping2 = NULL
	The mapping point of the second page mapped. More...

Function Documentation

IntLixFsrInitMap()

INTSTATUS IntLixFsrInitMap

(

QWORD

Gva

)

Initialize the fast read mechanism.

This function will map two pages starting from the Gva parameter.

Parameters

[in]

Gva

The guest virtual address to be mapped.

Returns

INT_STATUS_SUCCESS On success.

INT_STATUS_ALREADY_INITIALIZED If the fast read mechanism is already initialized.

The status returned by IntVirtMemMap if a mapping error occurs.

Definition at line 17 of file lixfastread.c.

Referenced by IntLixMmFindVmaInLinkedList(), IntLixMmFindVmaInRbTree(), IntLixVmaAdjustInternal(), and IntLixVmaFill().

IntLixFsrRead()

INTSTATUS IntLixFsrRead	(	QWORD	Gva,
		DWORD	Offset,
		DWORD	Size,
		void *	Buffer
	)

Performs a read from a previously mapped guest virtual address.

Parameters

[in]	Gva	The guest virtual address supplied to a previous IntLixFsrInitMap call.
[in]	Offset	The offset relative to the guest virtual address supplied to the IntLixFsrInitMap.
[in]	Size	The number of bytes which follows to be fetched.
[out]	Buffer	The buffer that stores the read outcome.

Returns

INT_STATUS_SUCCESS On success.

INT_STATUS_NOT_INITIALIZED If the mechanism is not yet initialized (via IntLixFsrInitMap).

INT_STATUS_INVALID_PARAMETER_1 If the Gva parameter is different from the mapped address.

INT_STATUS_INVALID_PARAMETER_3 If Buffer parameter does not point to a valid memory location.

INT_STATUS_INVALID_PARAMETER_MIX If the requested memory range spills out of the mapped range.

Definition at line 86 of file lixfastread.c.

Referenced by IntLixMmFindVmaInLinkedList(), IntLixMmFindVmaInRbTree(), IntLixVmaAdjustInternal(), and IntLixVmaFill().

IntLixFsrUninitMap()

void IntLixFsrUninitMap

(

void

)

Uninitialize the fast read mechanism.

Definition at line 62 of file lixfastread.c.

Referenced by IntLixMmFindVmaInLinkedList(), IntLixMmFindVmaInRbTree(), IntLixVmaAdjustInternal(), and IntLixVmaFill().

Variable Documentation

gMappedGva

QWORD gMappedGva = 0

static

The guest virtual address that is currently mapped.

Definition at line 10 of file lixfastread.c.

Referenced by IntLixFsrInitMap(), IntLixFsrRead(), and IntLixFsrUninitMap().

gMapping1

BYTE* gMapping1 = NULL

static

The mapping point of the first page mapped.

Definition at line 12 of file lixfastread.c.

Referenced by IntLixFsrInitMap(), IntLixFsrRead(), and IntLixFsrUninitMap().

gMapping2

BYTE* gMapping2 = NULL

static

The mapping point of the second page mapped.

Definition at line 13 of file lixfastread.c.

Referenced by IntLixFsrRead(), and IntLixFsrUninitMap().