IDA scripts to help you:

• objc_stubs.py
  • Fix all objc_* symbol types
• objc_hotkeys.py
  • Add Ctrl+4 HotKey to quickly navigate to selector's Xrefs.

Before running objc_stubs.py:

After running objc_stubs.py:

As you can see:

• The scripts fixed all selectors signatures:
  • For example: int __cdecl __spoils<X0,X1,X2,X3,X4,X5,X6,X7> objc_msgSend_initWithCapacity_(id object, __unused SEL selector, id initWithCapacity)
• In addition to fixing the objc_retain/release which now access high registers.
  • For example: id __usercall __spoils<> objc_retain_x20_45@<X0>(id x20@<X20>)

This makes it much easier to navigate through the code flow.

Have fun!