Method Run

NULLC/Executor_X86.cpp:671–945

}

void ExecutorX86::Run(unsigned int functionID, const char *arguments)
{
	int	callStackExtra[2];
	bool firstRun = false;
	if(!codeRunning || functionID == ~0u)
	{
		codeRunning = false;
		firstRun = true;
		InitExecution();
	}else if(functionID != ~0u && exFunctions[functionID].startInByteCode != ~0u){
		// Instruction pointer is expected one DWORD above pointer to next element
		callStackExtra[0] = ((int*)(intptr_t)NULLC::dataHead->instructionPtr)[-1];
		// Set next element
		callStackExtra[1] = NULLC::dataHead->nextElement;
		// Now this structure is current element
		NULLC::dataHead->nextElement = (int)(intptr_t)&callStackExtra[1];
	}
	bool wasCodeRunning = codeRunning;
	codeRunning = true;

	unsigned int binCodeStart = static_cast<unsigned int>(reinterpret_cast<long long>(&binCode[16]));
	unsigned int varSize = (exLinker->globalVarSize + 0xf) & ~0xf;

	if(functionID != ~0u)
	{
		if(exFunctions[functionID].startInByteCode == ~0u)
		{
			unsigned int dwordsToPop = (exFunctions[functionID].bytesToPop >> 2);
			void* fPtr = exFunctions[functionID].funcPtr;
			unsigned int retType = exFunctions[functionID].retType;

			unsigned int *stackStart = ((unsigned int*)arguments) + dwordsToPop - 1;
			for(unsigned int i = 0; i < dwordsToPop; i++)
			{
#ifdef __GNUC__
				asm("movl %0, %%eax"::"r"(stackStart):"%eax");
				asm("pushl (%eax)");
#else
				__asm{ mov eax, dword ptr[stackStart] }
				__asm{ push dword ptr[eax] }
#endif
				stackStart--;
			}
			switch(retType)
			{
			case ExternFuncInfo::RETURN_VOID:
				NULLC::runResultType = OTYPE_COMPLEX;
				((void (*)())fPtr)();
				break;
			case ExternFuncInfo::RETURN_INT:
				NULLC::runResultType = OTYPE_INT;
				NULLC::runResult = ((int (*)())fPtr)();
				break;
			case ExternFuncInfo::RETURN_DOUBLE:
			{
				double tmp = ((double (*)())fPtr)();
				NULLC::runResultType = OTYPE_DOUBLE;
				NULLC::runResult2 = ((int*)&tmp)[0];