Gray::cHookJump Class Reference

#include <cHookJump.h>

Public Member Functions
	cHookJump () noexcept
	~cHookJump ()
bool	isHookInstalled () const noexcept
bool	isHookValid () const noexcept
bool	isChainable () const noexcept
FARPROC	GetChainFunc () const
bool	InstallHook (FARPROC pFuncOrig, FARPROC pFuncNew)
void	RemoveHook ()

Static Public Attributes
static const BYTE	k_I_NULL = 0x00
static const int	k_LEN_J = 1
	size of the jump instruction. 0xe9 = k_JUMP_I More...
static const int	k_LEN_P = 4
	size of the relative pointer. NOT same as sizeof(FARPROC) or INT_PTR More...
static const int	k_LEN_A = 8
	k_LEN_D aligned to 8 (for 32 bit code) More...
static const int	k_LEN_D = k_LEN_J + k_LEN_P
	( k_LEN_J+k_LEN_P ) = size of actual instruction More...

Protected Member Functions
bool	SwapOld () noexcept
void	SwapReset () noexcept

Protected Attributes
FARPROC	m_pFuncOrig
	Pointer to the original/old function. The one i will replace. Inject code here. More...
BYTE	m_OldCode [k_LEN_D]
	what was at m_pFuncOrig previously. NOTE: What if this uses k_LEN_J the m_Lock isn't needed ?!!! More...
BYTE	m_Jump [k_LEN_D]
	what do i want to replace m_pFuncOrig with. jump to pFuncNew More...
cThreadLockFast	m_Lock
	prevent multiple threads from using this at the same time. More...

Friends
class	cHookSwapLock
class	cHookSwapChain
class	cHookJumpTests

Constructor & Destructor Documentation

cHookJump()

Gray::cHookJump::cHookJump ( )

inlinenoexcept

~cHookJump()

Gray::cHookJump::~cHookJump ( )

inline

Member Function Documentation

GetChainFunc()

FARPROC Gray::cHookJump::GetChainFunc

(

)

const

InstallHook()

bool Gray::cHookJump::InstallHook	(	FARPROC	pFuncOrig,
		FARPROC	pFuncNew
	)

Note

X86 ONLY!! 32 or 64 bit.

isChainable()

bool Gray::cHookJump::isChainable ( ) const

inlinenoexcept

isHookInstalled()

bool Gray::cHookJump::isHookInstalled ( ) const

inlinenoexcept

isHookValid()

bool Gray::cHookJump::isHookValid ( ) const

inlinenoexcept

Note

sometimes DLLs' can reload themselves and destroy our hook behind our backs.

RemoveHook()

void Gray::cHookJump::RemoveHook

(

)

SwapOld()

bool Gray::cHookJump::SwapOld ( )

inlineprotectednoexcept

put back saved code fragment. temporary to call previous version of the function. ASSUME use of cHookSwapLock m_Lock

SwapReset()

void Gray::cHookJump::SwapReset ( )

inlineprotectednoexcept

put back original JMP instruction again ASSUME use of cHookSwapLock m_Lock

Friends And Related Function Documentation

cHookJumpTests

friend class cHookJumpTests

friend

cHookSwapChain

friend class cHookSwapChain

friend

cHookSwapLock

friend class cHookSwapLock

friend

Member Data Documentation

k_I_NULL

const BYTE Gray::cHookJump::k_I_NULL = 0x00

static

k_LEN_A

const int Gray::cHookJump::k_LEN_A = 8

static

k_LEN_D aligned to 8 (for 32 bit code)

k_LEN_D

const int Gray::cHookJump::k_LEN_D = k_LEN_J + k_LEN_P

static

( k_LEN_J+k_LEN_P ) = size of actual instruction

k_LEN_J

const int Gray::cHookJump::k_LEN_J = 1

static

size of the jump instruction. 0xe9 = k_JUMP_I

k_LEN_P

const int Gray::cHookJump::k_LEN_P = 4

static

size of the relative pointer. NOT same as sizeof(FARPROC) or INT_PTR

m_Jump

BYTE Gray::cHookJump::m_Jump[k_LEN_D]

protected

what do i want to replace m_pFuncOrig with. jump to pFuncNew

m_Lock

cThreadLockFast Gray::cHookJump::m_Lock

protected

prevent multiple threads from using this at the same time.

m_OldCode

BYTE Gray::cHookJump::m_OldCode[k_LEN_D]

protected

what was at m_pFuncOrig previously. NOTE: What if this uses k_LEN_J the m_Lock isn't needed ?!!!

m_pFuncOrig

FARPROC Gray::cHookJump::m_pFuncOrig

protected

Pointer to the original/old function. The one i will replace. Inject code here.

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The documentation for this class was generated from the following files:

• c:/Dennis/Source/Gray/GrayCore/include/cHookJump.h
• c:/Dennis/Source/Gray/GrayCore/src/cHookJump.cpp