Method, apparatus and software for providing recovery data for program code

A data processing system comprising:

• a bus;
• a memory connected to the bus, wherein the memory contains a set of instructions;
• a processor connected to the bus, wherein the processor is operable to execute the set of instructions to:
• receive a first version of an object code module;
• receive a second version of the object code module, the second version being a subsequent version to the first version;
• insert a unique identifier in the second version, wherein the unique identifier indicates a location of recovery data;
• calculate first difference data representing a difference between the second version and the first version;
• and
• store the first difference data as the recovery data, wherein the first difference data is stored within the second version of the object code module at the location, and wherein the unique identifier indicates a location of the recovery data.

A computer-readable medium including a computer program product for providing recovery data for program code, the computer program product comprising:

• computer instructions for receiving a first version of an object code module;
• computer instructions for receiving a second version of the object code module, the second version being a subsequent version to the first version;
• computer instructions for inserting a unique identifier in the second version, wherein the unique identifier indicates a location of recovery data;
• computer instructions for calculating first difference data representing a difference between the second version and the first version;
• and
• computer instructions for storing the first difference data as the recovery data, wherein the first difference data is stored within the second version of the object code module at the location, and wherein the unique identifier indicates a location of the recovery data.