Final answer:
Preventing ROP attacks involves disabling code injection and stack modification, as well as reprogramming library functions to remove potential gadgets.
Step-by-step explanation:
One of the techniques of preventing Return-Oriented Programming (ROP) attacks is to disable code injection. By disabling code injection, it becomes more difficult for attackers to insert malicious code into a program. Another technique is to disable stack modification. This prevents attackers from manipulating the stack to execute arbitrary code.
Reprogramming library functions to remove potential gadgets is also a preventive measure against ROP attacks. These gadgets are small sequences of code that an attacker can use to modify the program's execution flow. By removing or modifying these gadgets, the likelihood of a successful ROP attack is reduced.