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51 lines
1.5 KiB
C
51 lines
1.5 KiB
C
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#pragma once
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/*
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* This file is part of the CitizenFX project - http://citizen.re/
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*
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* See LICENSE and MENTIONS in the root of the source tree for information
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* regarding licensing.
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*/
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// Changes:
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// - 2021/2/25: Added CEG decryption method.
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#include <Windows.h>
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#include <cstdint>
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class ExeLoader
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{
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public:
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using TEntryPoint = void (*)();
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using TFuncHandler = FARPROC (*)(HMODULE, const char*);
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explicit ExeLoader(uint32_t aLoadLimit, TFuncHandler aFuncPtr = GetProcAddress);
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bool Load(const uint8_t* apProgramBuffer);
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TEntryPoint GetEntryPoint() const { return static_cast<TEntryPoint>(m_pEntryPoint); }
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private:
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void LoadSections(const IMAGE_NT_HEADERS* apNtHeader);
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void LoadImports(const IMAGE_NT_HEADERS* apNtHeader);
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void LoadTLS(const IMAGE_NT_HEADERS* apNtHeader, const IMAGE_NT_HEADERS* apSourceNt);
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void LoadExceptionTable(IMAGE_NT_HEADERS* apNtHeader);
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void DecryptCeg(IMAGE_NT_HEADERS* apSourceNt);
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template <typename T> inline T* GetRVA(uint32_t aRva) { return (T*)(m_pBinary + aRva); }
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template <typename T> inline T* GetOffset(uint32_t aRva) { return (T*)(m_pBinary + Rva2Offset(aRva)); }
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template <typename T> inline T* GetTargetRVA(uint32_t aRva) { return (T*)((uint8_t*)m_moduleHandle + aRva); }
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private:
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uint32_t Rva2Offset(uint32_t aRva) noexcept;
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const uint8_t* m_pBinary = nullptr;
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const TFuncHandler m_pFuncHandler = nullptr;
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uint32_t m_loadLimit;
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HMODULE m_moduleHandle = nullptr;
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void* m_pEntryPoint = nullptr;
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};
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