Kernel

The PS4 kernel is based on FreeBSD 9.1 with some additions from the later version. This mean the PS4 system is Unix-like.

Functions

This is a list of functions that was defined in the PS4 kernel. All offset here is an offset in the memory, not a file offset.

acquire_per_file_info_obj

This function populate a fileinfo field on the obj parameter. It will never be invoked on a non-dynamic SELF.

Parameters

1. imgp: A pointer to image_params.
2. obj: A pointer to Obj_Entry.

Returns

• i32: zero on success or errno in case of error.

Locations

fast_syscall

This is an entry point of syscall instruction. It is almost identical to the FreeBSD version. It use standard System V AMD64 ABI for kernel interface the same as Linux, except rax is an actual errno in case of error (not a negative errno like Linux). The rax and rdx is also used for storing the return value. The CF on rFLAGS will be set if rax is an errno. In this case the rax will never be a zero.

Locations

Variables

This is a list of global variables in the PS4 kernel. All offset here are an offset in the memory, not a file offset.

proc0

proc0 is a proc structure represents the kernel process.

Locations

Data Types

This is a list of data types that are using in the PS4 kernel.

proc

proc represents a single process in the system, including the kernel itself. This struct mostly the same as FreeBSD version with some PS4 specific.

self_auth_info

This struct contains authorization information. The PS4 rely on this struct to determine what actions can be done for each thread. The PS4 obtained this struct from application image through the SAMU. Some examples of this structs can be found here.

thread

thread represents a single thread in a process. This struct mostly the same as FreeBSD version with some PS4 specific.