generate-signature-for-patch

To generate a runtime patch signature, provide the target instruction address and desired patch effect. The skill creates a unique byte signature to locate the instruction for patching, enforcing forward-only signature expansion from the fixed target instruction.

A patch signature is a unique byte sequence used to precisely locate specific machine instructions in binaries during reverse engineering. It enables reliable runtime patching for forcing branches, skipping calls, or changing immediate operands.

Yes, you can validate patch_bytes against the identified signature using the IDA Pro MCP workflow. This validation ensures safe and deterministic patching by verifying the generated signature uniquely identifies the target instruction.

Generating a runtime patch signature outputs patch_sig, patch_bytes, patch_va, patch_rva, and original_bytes. These outputs provide the signature, replacement bytes, virtual and relative addresses, and original data needed for patch application.

Limitations when generating patch signatures include the requirement that the target instruction must be fixed, and the skill enforces forward-only signature expansion. This ensures signature uniqueness but requires precise target instruction identification.

To force a branch or skip a call during runtime patching, provide the target instruction address and the desired patch effect. The skill generates a unique byte signature to locate the instruction and outputs the necessary patch_bytes for application.