Self-modifying Code Implementation on Godson-X

The act of a processor writing data into a currently executing code segment with the intent of executing that data as code is called self-modifying code. As processor architectures become more complex and start to speculatively execute code ahead of the retirement point, the rules regarding which code should execute, preor post-modification, become blurred. Although SMC seldom happens in current normal applications, it is necessary to handle this situation for programs with SMC. This paper analyses several methods for SMC handling, and gives a facile method that can be easily implemented. This method has been implemented on Godson-X processor model.