Simple utility to make FIRM-like binaries from regular ARM11/ARM9 payloads.
Since the amount of binaries is hardcoded to 4 in official FIRMs, makefirm follows this limitation.
The main FIRM header is created with the initial parameters <FIRM_out.bin> <ARM11 entrypoint> <ARM9 entrypoint>
For each binary you want to include [1-4] you can use <payload.bin> <load address> <0/1> (ARM9 = 0, ARM11 = 1) as extra parameters to makefirm.
For more information, see the source code.
Note: Obviously, the RSA signature is not calculated since we don't have the key. If this ever changes (doubt it) I'll modify makefirm to accept it.
fox8091 for the idea and some info, Brad Conte for the pd implementation of the SHA256 hashing algorithm and 3dbrew for the documentation.