Hacking Nintendo Update System Title?

[Jacobeian]

I don't think that there is a large benefi to what I want to do over the normal method. but:

I would have fun working on it,
I would partially do it for proof of concept,
and I would learn alot from it.

My original question stands:

If I want to modify the SM Update proceedure, where do I start.


Brian

PS: gawd this is hopeless. please do not get frustrated at me, but I did not ever "insist there is still a point." I never said any benefit would come doing what I want to do over the existing method. And hey, a new backup loader? what the heck does that have to do with anything??

I might be wrong but I think it is not possible to decompile the system menu modules, modify one of them (the update module in your case) then recompile everything in a modified SM binary, I think all you can do is disassemble existing code (with a PPC disassembler like IDA Pro and an appropriate dol module that can be found somewhere on wiibree or hackmii I think), analyze assembly code (which implies you can read PPC assembly) then patch code/data in memory to modify some hard-coded values or bypass some routines.

And if it's only for educational purpose, I don't see what you expect to learn from the update module, most likely it just works like Dop-Mii i.e get data from NUS server, assemble parts then install, I don't think there is anything new to discover.

 

[SifJar]

You'd have to disassemble the System Menu with something like IDA Pro (costs about $500 or there abouts), find the code in it that handles the updates (you'll have to know ASM pretty well to be able to find this code), then completely rewrite it, basically porting PatchMii into ASM (you'll have to be pretty amazing at ASM for this part), then recompile it. It is a LOT of work. It'd be less effort to completely rewrite dop-Mii. I'm not trying to discourage you, but if you really want a nice update patching solution, write a nice GUI for dop-Mii and make a channel of it or something, so you can easily access it from System Menu.