PS4 Modding system application

[meska]

Hello,
I would like to modify system (Sony-built) app, but I have no clue what steps should I take in order to achieve that. My main goal is to add an option to Media Player that would allow user to select DLNA folder content sort order. Currently, folder content gets sorted alphabetically and there's no option to change that. It doesn't allow to play audio albums in correct (nor filename-based, nor based on media meta info) order.
I have some development knowledge, machine running latest Debian, jailbroken PS4.
I'd like to know the steps that I would allow me to disassemble the app (EBOOT.BIN I suppose), debug it and apply changes afterwards to it.

 

[Berion]

You cannot resign back executable. So no mods is possible if You want them to be recognized by system alone without payloads.

 

[meska]

You cannot resign back executable. So no mods is possible if You want them to be recognized by system alone without payloads.

Thanks!
If this is the case - goal might be achieved by making a payload? One like FTP , App Dumper, etc.?

 

[Berion]

I'm not very familiar with PS4 scene but signing it is not only a obstacle. Let's say You can run this application like any other decrypted game or homebrew app (making from it standalone fake package), You still need to deal with all resources to be read not from system but from her pfs app dir (because run game/app is sandboxed and don't have access to the rest of system, at least it doesn't in official way). The same if You want doing it via payload alone instead fake package.

I believe for Ghidra and IDA are plugins for PS4.