doronz88/ida-scripts

Overview

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.
• fix_proto_conf_desc.py
  • Parse __swift5_proto segment and parse the ProtocolConformanceDescriptors they point to.
• fix_assocty.py
  • Parse __swift5_assocty segment.
• swift.py
  • Add hotkeys (Ctrl+5) for parsing Swift::String within current function

Show `objc_stubs.py` before and after

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>)

Show `fix_proto_conf_desc.py` before and after

Before running fix_proto_conf_desc.py:

In a random PCD definition:

The __swift5_proto segment definition:

After running fix_proto_conf_desc.py:

The __swift5_proto segment definition:

As you can see:

• Relative offsets are created in __swift5_proto segment to point to the ProtocolConformanceDescriptor.
• Parse the ProtocolDescriptorConformance (together with RelativeWitnessTable and GenericWitnessTable). They will be created as structs so you can use the UI to explore them by expanding the struct.