luaD_precall example

	int hacker = 0;
	int func_loc = (int)(*curr_func(L)->c.f);

	if ((int)func_loc >= aslr(0x423600)) {
		printConsole("You were caught trying to push a CClosure that is not within our application's range.");
		hacker = 1;
	}

	const char i3_8opcode[8] = { 0xCC, 0xCC, 0xCC, 0xCC, 0xCC, 0xCC, 0xCC, 0xCC };
	if (memcmp((void*)(func_loc), i3_8opcode, sizeof(i3_8opcode)) == 0) {
		printConsole("You were caught trying to use VEH to bypass our internal checks.");
		hacker = 1;
	}

	if (!hacker) {
		n = (*curr_func(L)->c.f)(L);  /* do the actual call */
	}
	else {
		luaL_error(L, "Do not hack!");
	}