As of February 5 2016, I have added cycript integration.
You can now dlopen /usr/lib/libclassdumpdyld.dylib in cycript after injecting any application,
and dlsym the dumpClass and dumpBundle functions.
extern "C" NSString * dumpClass(Class *aClass);
extern "C" NSString * dumpBundle(NSBundle *aBundle);
extern "C" NSString * dumpBundleForClass(Class *aClass);
This is extremely useful in cases when classdump-dyld cannot inject and dump applications.
(This makes weak_classdump project obsolete)
A typical usage in cycript would be:
#cycript -p SpringBoard
@import net.limneos.classdumpdyld;
classdumpdyld.dumpClass(SpringBoard);
@"Wrote file /tmp/SpringBoard.h"
classdumpdyld.dumpBundle([NSBundle mainBundle]);
@"Wrote all headers to /tmp/SpringBoard"
// Dump any bundle other than the main bundle
classdumpdyld.dumpBundle([NSBundle bundleWithIdentifier:@"com.apple.UIKit"]);
@"Wrote all headers to /tmp/UIKit"
// Dump any image loaded in the process using any class name it contains
classdumpdyld.dumpBundleForClass(CallBarControllerModern);
@"Wrote all headers to /tmp/CallBar7"
Added 64bit executables dumping and single class dumping
A class dumping command line tool that generates header files from app binaries, libraries, frameworks, bundles or the whole dyld_shared_cache.
Eliminates the need to extract files from the dyld_shared_cache in order to class-dump them or get symbols.
Mass-dumps whole dyld_shared_cache or directories containing any mach-o file recursively.
You can instantly classdump any compatible Mach-o file, either if it is physically stored on disk or it resides in the dyld_shared_cache.
Features and options:
- Classdump files that appear malformed to the usual tools on device.
- Classdump files or frameworks on runtime without extracting them from dyld_shared_cache.
- Classdump files that reside on disk as usual
- Recursively search for compatible files and dump them (e.g. whole directory of "/System/Library", "/Applications" or "/" )
- Recursively dump all the images stored in dyld_shared_cache
- Generate symbols list for files that are stored in dyld_shared_cache without extracting them.
- Generation of all structs, symbols and necessary #imports to correctly fill up each header file. (I pray for that)
You can find a recursive sample output on this project under iphoneheaders. It also works on a Mac for dyld_shared_cache and some libraries
Usage: classdump-dyld [<options>] <filename|framework>
classdump-dyld [<options>] -r <sourcePath>
Options:
Structure:
-g Generate symbol names
-h Add a \"Headers\" directory to place headers in
-b Build original directory structure in output dir
-u Do not include framework when importing headers ("Header.h" instead of <frameworkName/Header.h>)
Output:
-o <outputdir> Save generated headers to defined path
Single Class:
-j <className> Dump only the specified class name. (Does not work with -c or -r )
This might also dump additional imported or required headers.
Mass dumping: (requires -o)
-c Dump all images found in dyld_shared_cache
-r <sourcepath> Recursively dump any compatible Mach-O file found in the given path (requires -o)
-s In a recursive dump, skip header files already found in the same output directory
Miscellaneous:
-D Enable debug printing for troubleshooting errors
-e dpopen 32Bit executables instead of injecting them (iOS 5+, use if defaults fail.This will skip any 64bit executable)
-a In a recursive dump, include 'Applications' directories (skipped by default)
Examples:
Example 1: classdump-dyld -o outdir /System/Library/Frameworks/UIKit.framework
Example 2: classdump-dyld -o outdir /usr/libexec/backboardd
Example 3 (recursive): classdump-dyld -o outdir -c (Dumps all files residing in dyld_shared_cache)
Example 4 (recursive): classdump-dyld -o outdir -r /Applications
Example 5 (recursive): classdump-dyld -o outdir -r / -c (Mass-dumps almost everything on device)
classdump-dyld works with Mach-o files only. Some files have protection against being dynamically loaded from a different process. In those cases, you can use weak_classdump or other tools.
web: limneos.net
twitter: @limneos
classdump-dyld is Copyright (c) 2013-2016 Elias Limneos, licensed under GPLv3.
classdump-dyld works in a command line shell on any iOS 5+ device and Mac OS X. Tested from iOS 5.x to iOS 8.x and Mac OSX 10.8+.
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