Reconstructing Original Source Logic

When reverse engineering, especially optimized binaries, our goal is often to understand the original high-level code. This process is called source logic reconstruction.

Compilers transform human-readable code into machine instructions. Optimization makes this harder by rearranging, simplifying, or even removing parts of the original logic. Our task is to reverse this process.

Optimizations can drastically change how familiar programming constructs appear in assembly. For instance:

• Loop unrolling: A loop might become a sequence of repeated instructions.
• Function inlining: A function's code is inserted directly, removing the call.
• Dead code elimination: Unused variables or branches disappear entirely.

This makes direct mapping to source code difficult, requiring us to identify patterns instead.