This limitation is crucial, since this was the only to get syscalls, as they are randomized at boot.
The reason for that is after firmware 3.30 or so, Sony introduced sceKernelInhibitLoadingModule in their browser, which prevented us from loading additional modules. Savedata exploits are more powerful than WebKit exploits in terms of available syscalls.
They also don't have stack protection enabled by default, so stack smashing is the easiest way to trigger user ROP execution. It is possible because games that were developed with an SDK around 3.00 and lower were compiled as a statically linked executable, thus its loading address is always the same and it cannot be relocated to an other region, which means that if we have an exploit in such a game, we can happily do ROP and don't need to deal with ASLR. Since the release of h-encore you might be wondering how such an user entry point is even possible. Released on Septemas free DLCnote 1 (update 1.3.0.0), it features a space-themed setting, and various new mechanics such as 2-Dash Refills, Pufferfish and Jellyfish, alongside mechanics from every other chapter mixed in. Parental Level,Game Title,File Offset,PlayStation PRO Support,Current Version,Instant Download,Package Size,PlayStation VR,Piece,SHA1 Hash,Title ID,Play Together Farewell is both the final chapter of Celeste, as well as the longest and hardest.
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