oh hey I just have to write some powerpc assembly and find somewhere to patch it into an existing game.
no problem. usual shit to do on your day off.

I found that the scripting engine of Wheel of Fortune (2010, Wii) has an "adapter" system, which seems to basically be logging. But the key method is:
void SimpleVMAdapter::_report(char *message) {
}

it's empty. But it's still called, with logs.

so I just need to redefine it to point to something that actually logs, and I'm golden.

maybe it'll work if I just patch the vtable entry to point to OSReport?
or I'll explode the stack and crash the console and maybe even the emulator

nope. didn't work, didn't break either.
thankfully I've already patched Dolphin to add string support and I can just set a conditional

yep, this game is logging a bunch of state info as it starts up and everything. Nifty.

I found a perfect function to replace it with, except for CALLING CONVENTIONS

*shakes fist*

naturally the function I want to replace is 4 bytes before PVAlloc, which is used to allocate all memory for the scripting language, so overwriting it would be SLIGHTLY BAD

fuck the vtables. what if I pull out the whole vtable call and replace the report() call to instead just hit OSReport instead?

maybe that'll be easier and do less exploding of the everything

NOPE BECAUSE THEY'RE JUST HITTING THE NULL FUNCTION STRAIGHT FROM THE SCRIPTING LANGUAGE

so I just need to write a function using the __thiscall calling convention that routes the one parameter to OSReport, find somewhere to stuff it in the binary, and then modify the vtable to point to it.

should be easy!

note: this is a lie. it is not, in fact, easy