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<Reverse engineering a Wii game script interpreter, part 2 ⁄ >

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We now have 188MB of JSON describing the CPU state when an instruction tries to access either the bytecode file in memory or the interpreter state. However, it is not readable at all:

We need to enhance this by using the informations we already have on the interpreter behavior (where PC is stored, where is the instruction dispatcher, etc.). I wrote a very simple script called filter.py, which iterates on each line, loads the JSON object as a Python dict, applies a list of filters to it and prints the filtered line. Here is an example of a filter which detects lines in the dump from the instruction dispatcher:

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