Homebrew Official 5.5.X ELF Loader

[cmdj13]

Hello Josamilu.
Why do you want to implement an exit function ? The _doExit() function in init.c works fine and execute itself at the end of your elf main function, no ? It's working for me anyway.

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I guess it's because the loader doesn't find the boot.elf on the server (error 404). Is your elf file in the same directory than your payload ?

My setup is like this:

SERVER ROOT:
<some folders>
boot.elf
payload

and in the payload folder:
elfloader.bin
<all the other haxx files>

 

[eliboa]

My setup is like this:

SERVER ROOT:
<some folders>
boot.elf
payload

and in the payload folder:
elfloader.bin
<all the other haxx files>

just move your boot.elf in the payload folder and it should be fine

 

[josamilu]

Hello Josamilu.
Why do you want to implement an exit function ? The _doExit() function in init.c works fine and execute itself at the end of your elf main function, no ? It's working for me anyway.

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I guess it's because the loader doesn't find the boot.elf on the server (error 404). Is your elf file in the same directory than your payload ?

I also tryed the doExit(); finction in init.c but it also crashed for me. So it looks like there is a Problem in my code. Thanks anyway.

 

[cmdj13]

I always thought it had to be in the parent folder... thanks!

 

[Micael]

Now we can run emulators like gba snes or not yet?

 

[aidotato5]

Now we can run emulators like gba snes or not yet?

We can now run (mostly) anything that a Wii U game can, just nobody has developed an emulator yet.

 

[seagal112]

if libwiiu/elfexamples works, this should work too.

https://dl.dropboxusercontent.com/u/72398546/centipedewiiu.rar

But no controls on this, couldnt get it to work with vpad.

Loadiine based code works with controls and faster, but dont know if the elf can run with this loader.
Here is the link if someone wants to try:

https://dl.dropboxusercontent.com/u/72398546/loadiinecentipedewiiu.rar

 

[SonyUSA]

I'll just say this, the Exit code works fine on my 5.5.1 U in the hello elf example. However, some people say my exit function in my games (which is the same) doesn't work and crashes their WiiU, so I think there is some per-console case issue going on.

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First Centipede posted works, second one does not :/

 

[DeslotlCL]

Well this can keep people entertained while they wait for their savior hykem

 

[SonyUSA]

Well this can keep people entertained while they wait for their savior hykem

Not really, we can't get anything to work with it except Hello World and an unplayable, super slow centipede port lol

 

[DeslotlCL]

Not really, we can't get anything to work with it except Hello World and an unplayable, super slow centipede port lol

shh, or the little guys will start trashing in hykem again

 

[SonyUSA]

shh, or the little guys will start trashing in hykem again

Once I figure out how to compile C@VE as an .elf then I can throw in a ton of levels and it will be a nice game to play in interim :3

 

[eliboa]

Not really, we can't get anything to work with it except Hello World and an unplayable, super slow centipede port lol

I managed to get the gx2thread example working and other homebrews as well. I didn't experienced any _Exit issue neither.

 

[DeslotlCL]

Once I figure out how to compile C@VE as an .elf then I can throw in a ton of levels and it will be a nice game to play in interim :3

hehe, im looking forward for it d:

 

[SonyUSA]

I managed to get the gx2thread example working and other homebrews as well. I didn't experienced any _Exit issue neither.

Can you show me the makefile and how you got it to compile? @.@

 

[eliboa]

Here is the GX2Thread example i adapted in elf (sources + elf + elf loader i used + makefile).

 

[piratesephiroth]

So, I've spent the past 4 or 5 days fiddling with this to get it to work and it finally does, allows you to load a gigantic ELF into JIT, since apparently it's 32MB (and no RPX gets that big, even uncompressed because of the data section), and I just got it working. I've only tested it on my system but it should work on others if you have the ELF in the right place. It's provided as-is, with no warranty, feel free to do as you see fit. I'll get a better ELF documentation/structuring done soon.

Technical Explanation
If you wanna know how it works, I reused some code from FIX's ELF loader in libwiiu but I had to redo the whole thing because it was giving me lots of problems. It uses the very end of MEM1 (0xF5FFFFE0-FF)
to store stuff while it works, then copies the ELF into 0xF5800000 (slightly before that), it might have trouble with bigger stuff so I'd suggest developing file loading using sockets. It uses a catch() function at the start so I can jump to it to recover ROP chains. All the ROP does is copy the loader to the very end of JIT, and then reruns all the ROP to copy sections into the start as needed and then jumps to it.

Usage
It searches for a URL with /payload, so host it somewhere with a URL like http://192.168.0.7/payload?elfloader, it'll cut off that part and load a file called boot.elf (http://192.168.0.7/boot.elf)

Downloads??
Attached is libwiiu source for the ELF loader and the Hello World ELF I used to test. You can grab the code550.bin and host it wherever. It will probably only work on 5.5.X because of the ROP. Also had MrRean help me get this working, so thanks.

Will this this make my Wii U be capable of bearing my children?

 

[ThatNintendoNerd]

Hi, noob problem.

what directory should my .elf file be in? I tired where it would load code550.bin and it says
"Unable to find usable URL" when i load elfloader.

 

[SonyUSA]

OK! Here is something you guys can use right now!

It's a copy of C@VE - Beta 4

172.0.0.1:8080/payload/elfloader.mp4
172.0.0.1:8080/payload/boot.elf

Replace 172.0.0.1:8080 with your IP/website and port!

And if you guys want to submit your own levels for my game, grab the matrix from my thread and PM me the map! It's super simple!

http://gbatemp.net/threads/wip-c-ve-5-3-2-5-5-x.414000/

 

[ThatNintendoNerd]

Thank you so much. Didn't realize it had to be a new folder with those 2 files.
EDIT: I meant new folder by payload folder