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PS3 Hypervisor LV2 (GameOS) Dump Method is Revealed!

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247w ago - As promised, today JaicraB has revealed the PS3 Hypervisor LV2 (GameOS) dump method and circuit used to allow the PS3's memory to persist while booting into OtherOS, which then allows dumping of the memory.

This was apparently on a CECHG model system with board model SEM-001 1-875-384-21

To quote, roughly translated: DemonHades / JaicraB Extraction Method:

First of all, be careful if you're going to attempt this, I am not responsible.

It's about keeping the RAM alive when moving to OtherOS. To do this the ram must be fed at all times so as not to erase the data.

Overview map
Refer to the First Image below.

Zone A

This area is sensitive. At that point we had settled with two resistors together. You have to remove it (remove it, but you could also cause a short circuit). It has 4 legs. At this point it tells the RAM and the integrated MOSFET turns off.

Zone B

From the point labeled we get the feed. You can put anywhere on the track.

Zone C

At this point labeled we have to make a bridge to defeat the two resistors.

Zone D

The original point of the exploit.

Mini Circuit
Refer to the Second Image below.

The Technique

It is possible that the first time you start count him to do for the recovery.

It Summarized a bit with the following steps:

• Log into XMB.
• Touching, ejectura, configure, filling the memory with more information.
• Run a game, insert a BD, etc, etc.
• Then boot to OtherOS.
• Dump memory to exploit.

Remember: The first 36 Megabytes are the "privileged memory" that contains LV00, LV1, LV2. The rest is waste memory of XMB (very interesting) and data from OtherOS.

The next thing to try is to start a tiny linux system and do a full dump. So we would get more data from the XMB and less disturbed memory (from OtherOS)

The bad thing is my two-week vacation is over (I would have liked to have one more week to follow up).

Good luck to all and share!

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Comments 63 Comments - Go to Forum Thread »

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#53 - sapperlott - 246w ago
sapperlott's Avatar
Quote Originally Posted by korn16ftl3 View Post
question tho what is an XDR bus?
It's the memory bus - you have to know how the system talks to the memory first before trying to tap it. Just forget about tapping into the XDR memory.

#52 - renanbianchi - 246w ago
renanbianchi's Avatar
Exploration Pic by Demonhades:

#51 - jumbohype - 246w ago
jumbohype's Avatar
How about using a network shell with the ps3sdk instead of linux to dump the level 2?

#50 - Warrorar - 246w ago
Warrorar's Avatar
awsome work. very nice.

#49 - korn16ftl3 - 246w ago
korn16ftl3's Avatar
Quote Originally Posted by sapperlott View Post
The Infectus can't be used here since the XDR bus protocol is unknown (unless you pay $$$ to Rambus) and it operates at several GHz signalling rate.

Also restricting the memory use of Linux doesn't guarantee that the LV2 memory doesn't get overwritten. This is because there's no way of telling where the HV allocates the memory for the Linux partition. So you can't do something like "tell linux only to use the upper 32 MiB of RAM". You could guess the memory location based on the LPAR documentation on ps2dev.org but it would be just that - a guess.

Also the memory that Linux uses is split up into two parts. At boot time the kernel sees 128 MiB while (up to) another 112 MiB is added later as hot-plug memory.

well what my idea from the infectus was based on was some way to read the ram being it still has poer and all all we need to figure out is a tool to read the ram and the pin out for where to connect such tool.

the reason i used the infectus as an example is it has an external USB port as well as external power how ever im unshure like i said of the hardware or what it would really take to retreive dump from a system ultimitly not loading the otheros kernal what so ever (i.e something that runs a linux kernal indepetently of the PS3 as the ram still contains the data and is still supplied with power kinda like using the xbox PSU to power the DVD rom during a CFW flash)

question tho what is an XDR bus?


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