Wepik
The PlayStation 4 operating system (Orbis OS, a FreeBSD derivative) does not natively run standard ELF files for commercial games. Instead, it utilizes files. A SELF file is a signed, encrypted container that wraps around a standard ELF binary.
This article explores the technical intricacies of the PS4's memory hierarchy, the distinction between SELF and ELF formats, the role of the BSD kernel, and how modern homebrew loaders operate.
While the PS4 natively operates on Sony’s proprietary format, the ELF (Executable and Linkable Format) loader remains the cornerstone of the homebrew ecosystem. It is the mechanism that allows developers to execute unsigned, custom code on the console, turning a locked consumer appliance into a versatile development unit.
Further Reading:
If you’re a dev and want to compile an ELF loader:
Let’s look at how a typical PS4 homebrew ELF loader works, like the one found in PS4-ELF-Loader or modern payloads.
Sony did not invent a new binary format. They adopted the standard FreeBSD ELF loader but added constraints and custom dynamic linking. A valid PS4 ELF executable ( .elf ) must:
