Hi, I need to do a research project that inserts instructions (e.g., JMP) after each basic block at runtime of a program (when the program is already loaded into memory). I believe first I should allocate more memory space for each basic block in order to put the extra instructions, when the program is being compiled. Could anyone tell me how to implement it in GCC for x86 platform? E.g., which functions or data structures or materials for GCC I should look at or refer to. I really appreciate your kind help. Best, Yue