Secure and Smartphone-Assisted Reprogramming for Wireless Sensor Networks Based on Visible Light Communication

Figure 2

Memory layout and function calling process: the entry address of Fun_78 located in code block3 is 0x0656H and saved in hash table with address 0xBC54H. Invoking Fun_78 needs to obtain the hash table address (0xBC54), and then using function entry address (0x0656H) to complete invoking process.