Hi all,

For all those who kept bugging me on IRC about “what’s your status” and “when will you release it”, etc.. I’d like to give you a quick status update on my project :

First, this is NOT and I repeat, it’s NOT a port of PSGroove for the N900.. I started my project long before PSGroove was released, and my code has absolutely nothing to do with theirs and we don’t share any code in common. It is NOT a port, it’s a different implementation of the same exploit!
Secondly, it’s going pretty well so far, I finished writing it, all the code is there, and I’m testing it but I’m still getting some issues, for some reason the PS3 isn’t accepting the JIG, I hope I can get this fixed soon, so please, everyone just be patient, I will release it when it’s ready! But the good news is that it’s doable apparently!

For those who read my previous post, here’s an update :

- The kernel OOPS I was getting on linux was because my ‘hub’ was a high speed one, and when a device gets connected, the reply to GetPortStatus ommitted the ‘high speed’ flag in the response.. apparently, a high speed hub can only have high speed devices plugged into it, you can’t plug full speed or low speed devices in a hub, otherwise, your linux kernel crashes! It’s a use case the kernel developers didn’t think of (or didn’t find a way to test it). I will also soon release the code to reproduce that oops so people can look into it.

- I was able to get and set the address on the controller, but I had to add two new functions to the usb-gadget API. This means that you will eventually need to flash your device’s kernel to get advantage of the new functions.

- I figured out how to send a NAK in response to a IN interrupt.. you simply don’t queue anything, the controller apparently takes care of that automatically for you! and I had to read almost all of the controller’s code to figure that one out!

By writing this exploit as a standard linux driver, this means that my module can be used on any other linux-enabled devices.. this means not only the N900, but also the 770, N800, N810, Android phones and future Meego devices. It might need a little porting for some devices though, but it should still work…

That’s it, I’ll keep you informed on how it goes. Hopefully, we’ll soon be able to run homebrew on our PS3 simply by plugging our N900 to it, what a wonderful device it is :)

KaKaRoTo

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12 Responses to Update on PSJailbreak linux kernel (for N900 devices)

  1. nafan says:

    Great news !

    If you need to test on several devices, I’ve got Nokia 770, HTC Dream (G1), and a few other devices running Android…
    Just email nafan (A T) free (D O T) fr or tweet @nafanFR !

    Good luck for debugging ;)

  2. Timothy says:

    If you need a beta tester, I have an N900 with multiboot installed (useful to use more than one kernel) and I work as a kernel hacker

  3. wow dude says:

    Thanks for your work man. This is some advanced stuff. I don’t have a PS3, but I am studying CompSci so I just had to tell you how cool you are :)

  4. janisozaur says:

    Hello. I admit I haven’t read the whole post yet, but only skimmed it for occurences – having found none, I’d like to point you to quite useful book (by GKH) that might prove useful to you now. It’s “linux device drivers” and it’s available for free at lwn – http://lwn.net/Kernel/LDD3/.
    Good luck.

  5. [...] den Jailbreak auf die verschiedensten Geräte, unter anderem Taschenrechner (TI-84 Plus) , Handys (Nokia N900) und Sonys Playstation Portable zu portieren. Man darf gespannt sein, wann die erste Portierung [...]

  6. Francisco says:

    Hi,

    I have a n800 and slim ps3 with 3.41 fw and c/c++ developing and debug skills if you need any assistance either testing or debugging.

    Good work!

  7. okaboy says:

    Hi

    Is there a chance that you compile the module for the latest kernel?
    This is the showed error:
    insmod: error inserting ‘psfreedom.ko’: -1 Invalid module format

  8. okaboy says:

    BTW, Good work! Congrat!

  9. FBram says:

    Hey Kakaroto.
    just wanted to say congrats for this terrific job.
    I’m seriously considering buying a N900 (have a N810).

    Keep it up (and we’ll keep following you).

  10. Chewbacca says:

    Hermes never had donate buttons after everything he said for what it’s worth…