Category PS4 Jailbreaking       Thread starter PSXHAX       Start date Dec 31, 2016 at 11:30 PM       10,397       18            
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As promised, following their 33c3 2016 presentation Fail0verflow have updated their Blog with a console hacking 2016 postscript by PlayStation 4 hacker Marcan. :ninja:

Slides: Online / Download / Source Code

Check it out below, to quote: Console Hacking 2016: Postscript

Another year, another console hacking talk! This talk picks off where our lighting talk last year left off, and goes into detail of how we ported Linux to the PS4.

If you haven’t watched it, take a look before reading the rest of this post:

Last year we demoed Linux on the PS4. Since then, we’ve gotten 3D graphics working, polished a number of drivers, and wrote some new ones. Linux on the PS4 is now actually quite a usable OS, with some minor caveats. We can run Steam OS and many games stably (e.g. Portal 2, but most games that run well on Linux should work). The current kernel is based on Linux 4.9.

Continuing last year’s theme of focusing on the Linux port and loader instead of on exploits, this year’s talk focused on the hardware and what it takes to bring up Linux on a very much non-PC-compatible x86 platform. We also covered how we originally got kernel binary dumps via a hardware PCI Express man-in-the-middle attack two years ago, and Radeon reverse engineering tools.

So, what’s next? Well, last year we said we’d like to upstream some of the work into the Linux kernel, and we still plan to do so. Now that the drivers have been cleaned up a bit, that is starting to look more likely.

In addition, we are working on PS4 Pro support. Linux currently boots on it, but the GPU driver needs fixups. We are also interested in adding PS4 support to the newer AMDGPU kernel driver, so it might make sense to defer graphics work on the Pro until that is ready.

The platform is mostly limited by its CPU, as the PS4 has 8 rather weak cores while most PC games are optimized for 1 or 2 fast cores. Nonetheless, even the Dolphin emulator runs surprisingly well; it currently seems to be bottlenecked on CPU geometry processing, which might be caused by the Radeon driver (and might improve if we make improvements to that or switch to AMDGPU).

In practice, we get anywhere from 3 to 30FPS on Wind Waker, mostly in the 20-30FPS range depending on how much geometry is in the direction of the viewport (the 3FPS moments seem to be some kind of degenerate case and are rare).

With the Null GPU mode we do get ~30FPS, so the Gekko CPU emulation seems to be just about fast enough. There is plenty of pixel performance, so rendering GameCube games at 1080p or even beyond is no problem (we accidentally switched to 4K rendering at one point and it wasn’t even that slow). The PS4 Pro should work better, obviously.

We also need to work on performance switching and power management. Right now I’m not sure if the fan is doing the right thing, and the CPU performance mode is hardcoded in an init script, as the kernel CPU scaling is not working properly. The GPU might not be working in its maximum performance mode either. We’ll be taking a look at those issues soon.

As we said last year, we are not planning to release our exploits, as we believe that there are plenty of people capable of developing their own exploits for the PS4 userland and kernel; we are leaving that to the community. That said, we previously offered to help out anyone with an exploit who wants to run Linux, and our offer still stands: if you have a way to run kernel code on your PS4 and you want to run Linux, feel free to drop me a line. We had several people do so throughout the year and that helped fix some Linux bugs and improve ps4-kexec.

As usual, our repositories are all on GitHub:
Thanks to @B7U3 C50SS, @MrCarlesX and @ombus for the news tip in the PSXHAX Shoutbox and have a safe and happy new year all! :bananaman2:
Fail0verflow's PS4 Console Hacking 2016 33c3 Postscript Detailed.jpg
 
:idea: Reminder: Those without a Verified Badge yet on Discord to access the private areas we recommend Joining Us! Why? The waiting process takes a week for new Members, and there's a lot we're unable to share on public forums including the latest PS4 PKG Games. 🏴‍☠️

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Omar Basala

Member
Contributor
Don't expect much from fail0verflows, they already hacked the PS4 last year and here we are again, we were so excited to see what these guys will do this year and we thought they will reveal something about their work but they disappointment us again
 

UmarDaBest559

Senior Member
Contributor
Interesting, I made a vid on twitter with the FreeBSD thing about open software source and that is basically what he does messing with ssl and running Linux with a WebKit exploit. It's good research for the coming New Year of 2017 :) anyways, BigBoss is a Dev on cydia too for IOS software Jailbreaking

Don't expect much from fail0verflows, they already hacked the PS4 last year and here we are again, we were so excited to see what these guys will do this year and we thought they will reveal something about their work but they disappointment us again
Disappointment brings unexpected miracles
 

lobimagobi

Senior Member
Contributor
As we said last year, we are not planning to release our exploits, as we believe that there are plenty of people capable of developing their own exploits for the PS4 userland and kernel
Well for me it sounds like

As we said last year, we are not planning to release our exploits, as we don't have any exploits and videos we released were fakes. We believe that there are plenty of poeple capable of developing any exploit to hide our incompetence and global hate.
 

UmarDaBest559

Senior Member
Contributor
I dont understand whaat freebsd for?
If you go into your settings and go to system and click on agreement and scroll down to FreeBSD you can read about it to learn or research it
Well for me it sounds like

As we said last year, we are not planning to release our exploits, as we don't have any exploits and videos we released were fakes. We believe that there are plenty of poeple capable of developing any exploit to hide our incompetence and global hate.
Don't worry, it happens at unexpected times, I mean the good stuff!
 

HYTR

I'm a Dev now because my name is Grey.
Senior Member
Contributor
It's a test to see who the real coders are & who are full of it in the community.

98% non-coders. 2% coders.
 

charizard

Member
Contributor
Just because fail0verflow doesn't reveal his exploit doesn't mean we won't be able to boot Linux, but we might not be able to play backup games. I believe that he would help us to use the most comprehensive Linux distro such as Linux Mint without issues by porting the drivers. I was thinking of buying a decent notebook to use Linux, but in this case I won't need it at all :)

come on fail0verflow, might as well allow us to use Linux rather than the backups.
 
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