![]() ![]() ![]() ![]() If you prefer to read C code, you can get a C-like decompilation of the procedure by pressing Option-Return, or clicking Pseudo Code in the toolbar. 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. NET Explorer free 82 Remotesoft This program is a generic object browser and MSIL disassembler with professional look and feel. that lets you disassemble, decompile.executables. 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: Hopper Disassembler is a reverse engineering tool for Windows that lets you disassemble, decompile and debug your. 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. Hopper is described as reverse engineering tool for OS X and Linux, that lets you disassemble, and decompile your 32/64bits Intel Mac, Linux, Windows and iOS executables and is an app in the development category. 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. It is not clear why, because the assembly containing native code can not be tailored well, so I did not go into further research, welcome friends who are proficient in CLR to share experience.// clang -framework Cocoa -fobjc-arc test.m #import M圜lass : NSObject However, after I did what Washi1337 said, the program still failed to start. After all, the optimized assembly still preserves the original IL code. When performing disassembly and analysis on binaries of all sizes it keeps a small memory footprint to achieve very fast analysis. According to Washi1337, if only the native code in the assembly contains ReadyToRun, we can simply remove the ILLibrary flag from the assembly. Hopper Disassembler is a reverse engineering tool for Windows that lets you disassemble, decompile and debug your 32/64bits Windows executables. Checking the Windows event log, I found that it was caused by CLR startup failure. And in the actual use, I found that after modifying these assemblies, the program would fail to start. Instead, it may even increase the size of the assembly (see ). However, according to Washi1337, author of AsmResolver (an open source project similar to DnLib), the NativeWrite method tries to preserve the structure of the native code so that the assembly size cannot be reduced. ![]()
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