Hopper disassembler for mac1/10/2024 ![]() ![]() You can scroll around, zoom in and out, and even drag the components to different places to get the best view of what's going on. Press the space bar or click Show CFG while in the procedure, and Hopper breaks it into its component pieces and shows it in a separate window: If control flow is what we're interested in, we can get a really nifty graph view of the procedure. Hopper inserts arrows like these to show control flow, which makes it much easier to follow code. ![]() If you scroll down a bit, you'll notice a blue arrow pointing from the je 0x10000197A instruction to its target. Select either the symbol name or the first byte underneath it and mark it as a procedure by pressing the P key (again, no Command key) or clicking Mark As Procedure in the toolbar. The contents of this method start off as "unexplored", so they're displayed as raw bytes. ![]() The one that starts with objc_sel_ is a symbol for the selector, which is less interesting. The one which starts with methImpl_ is the one we want. Press shift-N (no Command key here, Hopper's key commands are a bit eccentric) to get a symbol search window. It's annoying to scroll around searching for it, but of course Hopper knows all about the symbols in your app. Let's find the initWithName:number: method. Fortunately, it's really easy to tell it how to interpret something. In particular, it doesn't identify Objective-C methods as code. It makes some effort to pick out code and treat it as code, but doesn't get everything right. Fundamentally, some sections of the executable are code and some are data, but you can have Hopper interpret any part in any way. Hopper fundamentally treats all bytes in the executable equally. Tell Hopper to open the executable created from the above code, and it will load it and perform some preliminary analysis: These documents can be saved separately, preserving any comments or annotations you've added from one session to the next.Ĭlick Read Executable in the toolbar or select it from the File menu to get started. Hopper has a concept of documents separate from the binaries you inspect. When you first start Hopper, you get a blank document window. Cutter is built on top of Qt and C++.// clang -framework Cocoa -fobjc-arc test.m #import M圜lass : NSObject The official graphic user interface of radare2 is called Cutter (originally named Iaito). This is how the Visual Graph Mode looks like: Radare2 has a powerful command line visual modes to help you go through the program and super useful while debugging. This should be enough in order to learn the basics of radare. You'll need to perform several more steps in order to sign radare and make it ready to debug applications without the need of root permissions. It’s recommended to use the current git version of radare2. ![]() Note that, in my opinion, the learning curve of r2 is pretty steep and it'll take some time to get use to it. You can find most of the features you have in IDA in radare (including the option to edit a binary that you debug) and in case you lack some feature you can always open a request on the Github page or develop it by yourself. *BSD, iOS, OSX, Solaris…) and it supports tons of architectures and file formats. It has great scriptingĬapabilities, it runs on all major platforms (GNU/Linux, Windows Searching, replacing, visualizing and more. Radare2 is an open source framework for reverse engineering andīinary analysis which implements a rich command line interface forĭisassembling, analyzing data, patching binaries, comparing data, I highly recommend radare2 which seems to suit you the best: ![]()
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