Decompilation apparatus and recompilation system for a processor architecture

A computer program product comprising program code stored in a memory of a computer system, wherein the program code implements a decompiler, and wherein the program code causes a processor of the computer system to perform at least steps a) and b) when the program code is executed by the processor of the computer system:

• a) dividing, by a matcher, captured first program code for a processor of a first processor architecture into a sequence of code sections based on matching the captured first program code to a predetermined set of at least partially parameterized code patterns, wherein the captured first program code implements a program logic and has been generated by compiling a computer program defined in a high-level language by a compiler, and the matcher captures for each code section of the sequence of code sections specific parameter values for each parameter of a corresponding parameterized code pattern and assigns to each code section of the sequence of code sections a terminal symbol of an intermediate language, and wherein the matcher is further adapted to capture binary code or assembly code during the compilation of the computer program for the first processor architecture and to extract machine code of the captured first program code contained therein;
• and
• b) reducing, by a parser, a sequence of terminal symbols assigned to the sequence of code sections to non-terminal symbols of the intermediate language by parsing the sequence of terminal symbols, wherein a totality of the non-terminal symbols of the intermediate language generated by the parser by the reduction describes the program logic of the computer program in the intermediate language.