163w 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 http://4.bp.blogspot.com/_4rtVxQc9D6s/S7dexn30R7I/AAAAAAAAAFs/tpo2XxknPKs/s1600/Zona+A.JPG
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 http://3.bp.blogspot.com/_4rtVxQc9D6s/S7deyC8VeyI/AAAAAAAAAF0/bGUuh1knvRA/s1600/Zona+B.JPG
From the point labeled we get the feed. You can put anywhere on the track.
Zone C http://2.bp.blogspot.com/_4rtVxQc9D6s/S7deye-D8wI/AAAAAAAAAF8/1EeIUE6Keyw/s1600/Zona+C.JPG
At this point labeled we have to make a bridge to defeat the two resistors.
Zone D http://2.bp.blogspot.com/_4rtVxQc9D6s/S7dYDoRKnRI/AAAAAAAAAE0/tp9grVoM5kQ/s1600/Zona+D.jpg
The original point of the exploit.
Mini Circuit Refer to the Second Image below.
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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hmm... so if i understand what i've been reading right, the hypervisor dump that we got was polluted with linux code, the solution to this would be to try to rework the otheros bootstrap which would just dump the same data without the linux code mixed into it, this would require the bootstrap to load from somewhere in the memory after the 36mb of code that we actually want (possibly by moving the bootstraps load location to the hardware on a HWBC console), this should give us our golden key right?... well ok, a map to the golden key but you know what i'm saying.
another option is to figure out how to build an external chip, aka MODCHIP (i know everyone cringes at the mention as they require hardware modification but this dose too), that would somehow record and output all everything thats loaded into the ram or other chips be recoded and outputted to a computer. but this is a very complicated process and could take years.
Nice catch! The only problem is that the bootloader used on the PS3 is a small Linux system itself so by the time this parameter is evaluated the bootloader Linux system is already loaded into memory without any contstaints. It would be possible to re-build the bootloader image with the same parameters, though.