Control Flow Graph Analysis
Understand and interpret Control Flow Graphs (CFGs) to visualize program execution paths and logic.
Intro to Control Flow Graphs
Welcome! In this lesson, we'll dive into Control Flow Graphs (CFGs). A CFG is like a roadmap for your program, visually showing all possible execution paths.
It's a crucial tool in reverse engineering because it helps you understand a program's logic without actually running it.
The Building Blocks: Basic Blocks
At the heart of a CFG are basic blocks. Think of a basic block as a straight line of instructions.
- It's a sequence of code with only one entry point (the first instruction).
- It has only one exit point (the last instruction).
- There are no jumps or jump targets anywhere in between.
For example, A = 10; B = A + 5; C = B * 2; could be a single basic block.
All lessons in this course
- Introduction to Disassemblers
- Identifying Functions and Data
- Control Flow Graph Analysis
- String & Cross-Reference Analysis