IDAObjcTypes

A collection of (public and private) types and functions definitions useful for iOS/macOS 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 8+)

1. 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).
2. Copy IDA.til and IDA32.til to til folder inside IDA application directory.
3. In IDA Pro, open Type Libraries window via View > Open subviews > Type libraries or press Shift + F11.
4. Right-click the type list and select Load type library....
5. Select IDA (or IDA32 if you target 32-bit binaries) and click OK button.

TIL created via this command:

tilib -c -hIDA.h IDA.til -D__EA64__ -P -tIDAObjcTypes
tilib -c -hIDA.h IDA32.til -P -tIDAObjcTypes32

Usage (IDA Pro 7)

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 (Binary Ninja)

1. Go to Analysis > Import Header File....
2. In Header File(s), browse for IDA.h in this project.
3. In Compiler Flag(s), add -D__EA64__ -D__BINJA__.
4. Click Import button.

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 in this project 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
• AVFCapture
• 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