PlayStation hacker/devloper SKFU has written another article on his blog, this one specifically aiming at the PS4, here is a small quote from his article:
Sadly there’s no blueprint of the PS4’s filesystem as far as I know, so how would we know where we want to go? We need to collect as many information about the filesystem and it’s environment as possible to even be able to determine our possible research targets and vulnerabilities.
For any PlayStation platform there are 3 good and legit ways to go for:
Visit PlayStationHaX Forum To Discuss This Story Here :: PS4 – The State of Things Part II: Environment Analysis By SKFU