IDAObjcTypes

A collection of (public and private) types and functions definitions useful for Objective-C binaries analysis.

Why even?

Would you rather re-define the same functions or types over and over as you work with different binaries?

Usage (IDA Pro, 7.2+ recommended)

Go to File > Load file > Parse C header file then choose IDA.h to import everything at once.

Or, run this IDA command: idaapi.idc_parse_types("/path/to/IDAObjcTypes/IDA.h", idc.PT_FILE)

Usage (Ghidra)

1. Go to File > Parse C Source.
2. (Go to 6. if it's not the first time you do this) Clone objc_mac_carbon.prf profile into a new profile, called OBJC.prf, for example.
3. Remove everything in Source files to parse, and add IDA.h to the list.
4. Add two additional flags: -D__EA64__ -DGHIDRA to Parse Options.
5. Save OBJC.prf profile as you might use it later.
6. Click Parse to Program, click Proceed if anything pops up.
7. Check Data Type Manager window (at bottom-left), (long) right-click at <your-binary-name> and select Apply Function Data Types.

Ghidra limitation

You have to manually specify the size of enum members if what you get is incorrect.

iOS version-specific analysis

Uncomment // #define IOS14 inside IDA.h before you import it if you are reversing iOS 14 or lower binaries.

Included Frameworks/Libraries

More to be added as the owner reverses more binaries.

• AppSupport
• AssetsLibraryServices
• AudioToolbox
• AVFoundation
• CommonCrypto
• CoreAnimation
• CoreAudio
• CoreFoundation
• CoreGraphics
• CoreMedia
• CoreServices
• CoreText
• CoreVideo
• CydiaSubstrate (if you ever want to RE tweaks)
• Darwin
• Foundation
• GraphicsServices
• IOMobileFramebuffer
• IOKit
• IOSurface
• Kernel
• MediaRemote
• MobileGestalt
• PowerLog
• Security
• SoftLinking
• SpringBoard
• SpringBoardHome
• Swift (WIP, PRs welcome)
• System (libSystem)
• SystemConfiguration
• UIKit
• dyld
• icu
• objc
• os
• pthread
• sandbox
• sqlite
• xpc
• fishhook