Function get_kmodule_export

dependencies/vdm/util/util.hpp:131–233

	}

	__forceinline auto get_kmodule_export(const char* module_name, const char* export_name, bool rva = false) -> void*
	{
		void* buffer = nullptr;
		DWORD buffer_size = NULL;

		NTSTATUS status = NtQuerySystemInformation(
			static_cast<SYSTEM_INFORMATION_CLASS>(SystemModuleInformation),
			buffer,
			buffer_size,
			&buffer_size
		);

		while (status == STATUS_INFO_LENGTH_MISMATCH)
		{
			VirtualFree(buffer, 0, MEM_RELEASE);
			buffer = VirtualAlloc(nullptr, buffer_size, MEM_COMMIT | MEM_RESERVE, PAGE_READWRITE);
			status = NtQuerySystemInformation(
				static_cast<SYSTEM_INFORMATION_CLASS>(SystemModuleInformation), 
				buffer, 
				buffer_size, 
				&buffer_size
			);
		}

		if (!NT_SUCCESS(status))
		{
			VirtualFree(buffer, 0, MEM_RELEASE);
			return nullptr;
		}

		const auto modules = static_cast<PRTL_PROCESS_MODULES>(buffer);
		for (auto idx = 0u; idx < modules->NumberOfModules; ++idx)
		{
			// find module and then load library it
			const std::string current_module_name = 
				std::string(reinterpret_cast<char*>(
					modules->Modules[idx].FullPathName) +
					modules->Modules[idx].OffsetToFileName
				);

			if (!_stricmp(current_module_name.c_str(), module_name))
			{
				std::string full_path = reinterpret_cast<char*>(modules->Modules[idx].FullPathName);
				full_path.replace(full_path.find("\\SystemRoot\\"), 
					sizeof("\\SystemRoot\\") - 1, std::string(getenv("SYSTEMROOT")).append("\\"));

				const auto module_base = 
					LoadLibraryEx(
						full_path.c_str(),
						NULL, 
						DONT_RESOLVE_DLL_REFERENCES
					);

				PIMAGE_DOS_HEADER p_idh;
				PIMAGE_NT_HEADERS p_inh;
				PIMAGE_EXPORT_DIRECTORY p_ied;

				PDWORD addr, name;