function-diff

What problem does it solve?

This skill enables reverse engineers to compare a specific function across binary updates by generating a portable signature and locating the same function in a new build to surface changes in disassembly.

Core Features & Use Cases

• Phase 1 (Before Update): Disassemble the target function, generate a portable signature, and record address, size, and references for relocation.
• Phase 2 (After Update): Relocate the function using the signature, re-disassemble the new version, and compare instructions and structure to report changes.
• Signature generation & relocation: Create stable patterns that survive address shifts across builds for reliable re-identification.
• Use Case: Patch verification, regression analysis, and debugging when function offsets change between binary updates.

Quick Start

Provide a function signature or address to capture before the update, then re-run the skill after the update to locate and compare the function.