Support ARM11 Memory Patches about cakesforeverywan HOT 3 OPEN

The binary for a service patch would load to the first free area it can be called from, and the service table would be set to where it's located in memory.

That's exactly how memory patches work. Now, I'm assuming this svcBackdoor is for arm11, in which case the current implementation for memory patches won't work yet. This is because I don't know of any place where I'm sure the patches won't be overwritten, aside from address translation.

from cakesforeverywan.

Yes, the service table/svcBackdoor is arm11.

I'll change the title to 'Allow ARM11 Memory Patches'.

IMHO, Memory patches are pretty confusing and not well documented, it took me a bit to sift through the code to realize that's how you use them and I still have no clue how to implement one.

The way Luma3DS/the experimental cake does it is by putting the code in the ARM11 exceptions page at the first free location, which won't be overwritten afaik. Requires some runtime checks for safety, though.

from cakesforeverywan.

IMHO, Memory patches are pretty confusing and not well documented

Hm, I guess. Though it's not much more than: Memory patch is written to a free location, patcher makes sure whatever FIRM patch requires it points towards it (and I agree the code for it is shittily documented).

from cakesforeverywan.