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GeoHot Releases Sample PS3 Linux Isolated SPU Loader Code

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255w ago - Today GeoHot has released sample PS3 Linux isolated SPU loader code for those with OtherOS to experiment with.

To quote: "Right now, I'm playing with the isolated SPEs, trying to get metldr to load from OtherOS. Interesting thing, I am not using the exploit. I always assumed the enable isolation mode register was hypervisor privileged.

It's not, it's kernel privileged, which means using hypervisor calls you can all get to it. So, get to hacking. [Register or Login to view links] is the code I am playing with.

I'm not that opposed to releasing the exploit, but I think the majority of you are going to be disappointed, even if you do get it working. Unless you have pushed the HV to it's limits, this exploit really isn't going to do much for you... yet.

So install OtherOS and start playing around. If people start coming up with convincing reasons why they need the exploit to go further, I'll release it. It's just a waste to release if people can't make use of it.

As far as the GPU goes, I have full access to the GPU memory space 0x2800... But without a driver, it's useless. 3D video card drivers are notoriously hard to write, look at the ATI and NVIDIA ones for linux. The best are still the closed source manufacturer ones.

I'm not even sure I believe that the HV restricts video card access, just that the OtherOS driver is 2D. If someone skilled in video card driver development comes forward, and they can explain in detail what the HV is restricting, I'll send them the exploit."

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Comments 44 Comments - Go to Forum Thread »

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#14 - Shrink - 255w ago
Shrink's Avatar
Thanks for the refreshing answer! I'm curious...

#13 - veggav - 255w ago
veggav's Avatar
A good thing came out of it, the scene seems to be unifying. People are testing the same code and sharing over the same thing.

Hope this continues, closed doors will not lead us to nothing.

#12 - PS3 News - 255w ago
PS3 News's Avatar
Quote Originally Posted by Shrink View Post
Why can't he just release the exploit?

I mean... what's the deal? I just don't get it.

The deal is, it's slowly leaking out... just GeoHot is isolating himself from the fallout (which is safer for him).

He wants to see what people can do with what is available, because he may never have to release the exploit if other doors open within the community. There is another "leak" on Elotrolado, but I will start a new thread for that via the Site News shortly.

#11 - Shrink - 255w ago
Shrink's Avatar
Man, I'm gettin tired of this!

Why can't he just release the exploit? What's the use holding it back? If it's really THAT big he will get his place in the hall of fame.
But for now there is only chitchat going on and that's really annoying since there is no obvious reason for this.

  • Did he just realize that he may not have hacked the system 100%?
  • Is he negotiating with Sony?

I mean... what's the deal? I just don't get it.

#10 - adrianc1982 - 255w ago
adrianc1982's Avatar
baby steps, its going fast enough as it is and homebrew will come in due time..


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