90w ago - Following up on the PSP SaveGame Exploit on PS Vita from a few days ago, today PlayStation Vita hacker wololo reports that Davee has obtained PSP Kernel access on PS Vita through another exploit with a PS Vita PSP HEN demo video and details below!
To quote: Famous PSP dev Davee just posted a YouTube video showing him running PSP homebrews on a Vita. I initially thought “well, not a big surprise, he’s running his own port of VHBL to some random exploited game”, but it turns out this is much more interesting than that, as he managed to get a PSP Kernel exploit running on the PSP Emulator.
Davee had hinted a few days ago on twitter that he had PSP User mode access, but it’s a surprise to see Kernel mode today. What this means to the end user is full homebrew compatibility (unlike VHBL which is hit and miss), and potentially down the road, PSP iso loaders (the video actually shows a psp iso running). Check his video below:
The video shows a minimalist interface called “PRX Loader” which seems to be used to run the homebrews. No word from Davee yet on a release date.
Update: The end of the video also shows some gameplay of Ratchet and Clank, which indicates Davee already has PSP isos working to some extent on this exploit.
I don’t know what impact this will have on wth's release for VHBL. We had actually started the process, but Davee’s work might make VHBL fairly irrelevant. I’ll try to contact the involved people to know what to do next about that.
Congrats Davee, exciting times ahead! Thanks to Yoti for the tip!
From his blog via lolhax.org/2012/03/21/ps-vita-psp-hen/ to quote:
First thing first, huge thanks to Proxima and some1. They’ve provided key utilities and advice for this research. So, yeah, it was really only a matter of time till this kind of thing happened. Sony dont just emulate the userland process of a PSP game, they emulate the entire kernel albeit, a modified kernel. The PSP emu has limited access to hardware, with interfacing the hardware done via a Kermit module. Kermit is a old-timers transmission protocol, likely used to talk to the native Vita.
The PS Vita, is a nifty little device, and the PSP emulator is a good target to get a huge library of homebrew. Check out the video below for a demonstration of what can be achieved.
You can see, that it works! The benefit is that HEN can access the core of the kernel, allowing almost seamless compatibility. However, as you may know, VHBL cannot run Lamecraft. Nor can this HEN currently. Lamecraft uses the OSK interface which has been replaced with Vita’s OSK. It’s likely a software error in the PSP kernel from the arguements passed in the homebrew.
There is other things, and perhaps i’ll make a post for them another time, but for now, later.
Finally, from YouTube, to quote: Hi I'm Davee, and this is what happens when you emulate the entire psp kernel in the PS Vita. You can get a HEN! For technical information, contact on at lolhax.org Alternatively, visit #hellcat on irc.hellcat.net
PSP homebrew developers
P.S. This isn't a huge achievement, but kernel access does grant us access to the sceKermit library
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Fun fact: PSP emulator is still having a lot of backdoors that are not patched.
Vita mode is also having some serious problems with me. When playing Unit13 the game stuck a lot of times on loading a save-game. Also when you eject the game and push the PS button it will start to blink. I cannot get it to work anymore. I let it run dry on battery but when i switch it on the PSVita still has black screen and a blinking PS button. So i guess we can do something with that. Time will tell... Unfortunately i cannot help because of the blinking PS button.
EDIT: Don't panic. To save the PlayStation Vita from the blinking blue light of death, hold the On/Off button located on the top of your Vita for about 30 seconds. Your Vita will boot into a debug menu where you can choose to start it up normally.
Hey there ! I just downloaded the Unit 13 demo (which took approximately 2h to complete), I disabled wifi after this of course, and the VHBL is still working
But if you don't want to take the risk, you can always turn off your wifi router, turn your PS Vita on and disable wifi on it (and remove your wifi settings too, just in case) and then turn your wifi router on again