GBA/agbcc support

[H-A-M-G-E-R]

right now ghidra make very messy decompiled code for gba, full of gotos, unrecovered jumptables, and return in_lr's, even with structs specified
i'm decomping more functions in metroid fusion https://github.com/H-A-M-G-E-R/mf

[simonlindholm]

ARM makes a lot of sense to be the next arch added for m2c, but I have had very little time to work on decomp stuff lately so it'll be a long time until it happens. Unless someone else steps up.

[H-A-M-G-E-R]

One big hurdle to implementing an ARM decompiler is distinguishing between branching bl and calling bl.

[simonlindholm]

Do you have an example of branching bl? (I don't think this will be a problem, it can based on whether something is annotated as a global or a local label in the asm)

[H-A-M-G-E-R]

some screenshots of my fork of ghidra:


i made changes to correct the order of switch and if/else statements and formatting