Following his GhidraOrbisTools PS4 Loader and IDA Script Ports developer @KIWIDOGGIE (aka diwidog on Twitter) recently added a GetEventHandlerNames Python Script (GetEventHandlerNames.py) by kd_tech_ to his KiwiDoggie Productions IDA ConsoleHacking Scripts repository on Github for PS4 scene developers using the IDA Interactive Disassembler for code examination and reverse-engineering. 
Download: GetEventHandlerNames.py / OrbisKernelSyscalls.java (Labels syscalls in kernel dumps/decrypted) / IDA-ConsoleHacking-Scripts-master.zip / GIT
From GetEventHandlerNames.py on Github:
Cheers to @HydrogenNGU for the heads-up on Twitter earlier today! 
Download: GetEventHandlerNames.py / OrbisKernelSyscalls.java (Labels syscalls in kernel dumps/decrypted) / IDA-ConsoleHacking-Scripts-master.zip / GIT
From GetEventHandlerNames.py on Github:
Code:
#!/usr/bin/env python
#
# OpenOrbis Project providing 100% free and open source development
# This script will enumerate and print out in the console all of the eventhandler_register names
# so you can use them in your own kernel scripts
# **** the pirates
#
# Created by: kd (@kd_tech_)
# Started on: Jan 25, 2020
#
def get_eventhandler_register():
s_Ea = idc.BeginEA()
for l_FunctionAddress in idautils.Functions(SegStart(s_Ea), SegEnd(s_Ea)):
l_FunctionName = idc.GetFunctionName(l_FunctionAddress)
# check if it's our variable
if l_FunctionName.startswith("eventhandler_register"):
return l_FunctionAddress
return idaapi.BADADDR
if __name__ == "__main__":
s_EventHandlerRegister = get_eventhandler_register()
if s_EventHandlerRegister == idaapi.BADADDR:
msg("err: could not find eventhandler_register\n")
#msg("found eventhandler_register: %x\n" % s_EventHandlerRegister)
for l_XRef in idautils.XrefsTo(s_EventHandlerRegister):
l_XRefEA = l_XRef.frm
l_XRefAddrs = idaapi.get_arg_addrs(l_XRefEA)
if l_XRefAddrs == None:
continue
# eventhandler_tag eventhandler_register(struct eventhandler_list *list, const char *name, void *func, void *arg, int priority)
#msg("len: %d\n" % len(l_XRefAddrs))
l_Arg = l_XRefAddrs[1]
l_NameAddress = long(idc.GetOperandValue(l_Arg, 1))
l_Name = idc.get_strlit_contents(l_NameAddress)
msg("%s - %s\n" % (l_Name, "0")) #
#msg("complete\n")
