155 lines
3.8 KiB
C++
155 lines
3.8 KiB
C++
//===========================================================================//
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//
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// Purpose: Implementation of the CMemory class.
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//
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// Original commit: https://github.com/IcePixelx/silver-bun/commit/72c74b455bf4d02b424096ad2f30cd65535f814c
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//
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//===========================================================================//
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#pragma once
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#include <iostream>
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#include <string>
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#include <vector>
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#include <windows.h>
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#include <psapi.h>
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class CMemory
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{
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public:
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enum class Direction : int
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{
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DOWN = 0,
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UP,
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};
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CMemory(void) = default;
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CMemory(const uintptr_t ptr) : ptr(ptr) {}
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CMemory(const void* ptr) : ptr(uintptr_t(ptr)) {}
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inline operator uintptr_t(void) const
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{
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return ptr;
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}
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inline operator void*(void) const
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{
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return reinterpret_cast<void*>(ptr);
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}
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inline operator bool(void) const
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{
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return ptr != NULL;
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}
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inline bool operator!= (const CMemory& addr) const
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{
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return ptr != addr.ptr;
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}
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inline bool operator== (const CMemory& addr) const
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{
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return ptr == addr.ptr;
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}
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inline bool operator== (const uintptr_t& addr) const
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{
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return ptr == addr;
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}
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inline uintptr_t GetPtr(void) const
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{
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return ptr;
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}
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template<class T> inline T GetValue(void) const
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{
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return *reinterpret_cast<T*>(ptr);
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}
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template<class T> inline T GetVirtualFunctionIndex(void) const
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{
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return *reinterpret_cast<T*>(ptr) / 8;
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}
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template<typename T> inline T CCast(void) const
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{
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return (T)ptr;
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}
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template<typename T> inline T RCast(void) const
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{
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return reinterpret_cast<T>(ptr);
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}
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inline CMemory Offset(ptrdiff_t offset) const
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{
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return CMemory(ptr + offset);
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}
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inline CMemory OffsetSelf(ptrdiff_t offset)
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{
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ptr += offset;
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return *this;
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}
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inline CMemory Deref(int deref = 1) const
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{
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uintptr_t reference = ptr;
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while (deref--)
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{
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if (reference)
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reference = *reinterpret_cast<uintptr_t*>(reference);
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}
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return CMemory(reference);
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}
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inline CMemory DerefSelf(int deref = 1)
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{
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while (deref--)
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{
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if (ptr)
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ptr = *reinterpret_cast<uintptr_t*>(ptr);
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}
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return *this;
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}
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inline CMemory WalkVTable(ptrdiff_t vfuncIndex)
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{
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uintptr_t reference = ptr + (sizeof(uintptr_t) * vfuncIndex);
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return CMemory(reference);
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}
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inline CMemory WalkVTableSelf(ptrdiff_t vfuncIndex)
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{
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ptr += (sizeof(uintptr_t) * vfuncIndex);
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return *this;
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}
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bool CheckOpCodes(const std::vector<uint8_t>& vOpcodeArray) const;
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bool IsMemoryReadable(const size_t nSize) const;
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void NOP(const size_t nSize) const;
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void Patch(const char* pszOpcodes) const;
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void Patch(const uint8_t* pOpcodeArray, const size_t nSize) const;
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void Patch(const std::vector<uint8_t>& vOpcodeArray) const;
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void PatchString(const char* szString) const;
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CMemory FindPattern(const char* szPattern, const Direction searchDirect = Direction::DOWN, const int opCodesToScan = 512, const ptrdiff_t occurrence = 1) const;
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CMemory FindPatternSelf(const char* szPattern, const Direction searchDirect = Direction::DOWN, const int opCodesToScan = 512, const ptrdiff_t occurrence = 1);
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std::vector<CMemory> FindAllCallReferences(const uintptr_t sectionBase, const size_t sectionSize);
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CMemory FollowNearCall(const ptrdiff_t opcodeOffset = 0x1, const ptrdiff_t nextInstructionOffset = 0x5) const;
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CMemory FollowNearCallSelf(const ptrdiff_t opcodeOffset = 0x1, const ptrdiff_t nextInstructionOffset = 0x5);
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CMemory ResolveRelativeAddress(const ptrdiff_t registerOffset = 0x0, const ptrdiff_t nextInstructionOffset = 0x4) const;
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CMemory ResolveRelativeAddressSelf(const ptrdiff_t registerOffset = 0x0, const ptrdiff_t nextInstructionOffset = 0x4);
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static void HookVirtualMethod(const uintptr_t virtualTable, const void* pHookMethod, const ptrdiff_t methodIndex, void** ppOriginalMethod);
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static void HookImportedFunction(const uintptr_t pImportedMethod, const void* pHookMethod, void** ppOriginalMethod);
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private:
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uintptr_t ptr = 0;
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};
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