FunctionPatch Class Reference

Simplifies inserting JMP commands in the beginning of functions. More...

List of all members.

Classes
class	MemoryLocker
	Allows retreiving read/write access to read-only kernel memory. More...
Public Member Functions
	FunctionPatch ()
	~FunctionPatch ()
bool	Patch (void *pFunc, void *pNewFunc)
	Inserts the JMP instruction in the beginning of a function and stores the bytes being overwritten.
Static Private Member Functions
static void	_PatchFunction (void *pFunc, void *pDest)
	Replaces the first 5 bytes of a function by a JMP instruction.
Private Attributes
char	m_PreviousBytes [5]
void *	m_pAddress

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Detailed Description

Simplifies inserting JMP commands in the beginning of functions.

This class represents a single patched function (with a JMP instruction inserted in the beginning). Typically, after creation the FunctionPatch::Patch() method should be called to patch a function. During patching, the class instance stores the data that was replaced by inserting a JMP and restores this data back when the object is deleted. That way, each patched function should have a corresponding FunctionPatch instance.

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Constructor & Destructor Documentation

FunctionPatch::FunctionPatch

(

)

[inline]

FunctionPatch::~FunctionPatch

(

)

[inline]

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Member Function Documentation

static void FunctionPatch::_PatchFunction	(	void *	pFunc,
		void *	pDest
	)			[inline, static, private]

Replaces the first 5 bytes of a function by a JMP instruction.

This method performs the actual patching and is internally used by Patch() method.

Parameters:

	pFunc	Specifies the address of a function to be patched
	pDest	Specifies the target address of the JMP instruction

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bool FunctionPatch::Patch	(	void *	pFunc,
		void *	pNewFunc
	)			[inline]

Inserts the JMP instruction in the beginning of a function and stores the bytes being overwritten.

Parameters:

	pFunc	Specifies the address of a function to be patched
	pNewFunc	Specifies the target address of the JMP instruction

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Member Data Documentation

void* FunctionPatch::m_pAddress [private]

char FunctionPatch::m_PreviousBytes[5] [private]

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

• kdpatch/kdpatch.cpp