You can use "Live View" to see how code is disassembled in real time, one byte at a time, or upload a file. Online Disassemblers ODA is a free, web-based disassembler for a wide variety of architectures. Each disassembler will have different features, so it is up to you as the reader to determine which tools you prefer to use. Notice that there are professional disassemblers (which cost money for a license) and there are freeware/shareware disassemblers. Here we are going to list some commonly available disassembler tools. We will typically not use HLA syntax for code examples, but that may change in the future. Examples in this book will use Intel and AT&T syntax interchangeably. Many disassemblers have the option to output assembly language instructions in Intel, AT&T, or (occasionally) HLA syntax. Of course, disassembly has its own problems and pitfalls, and they are covered later in this chapter. Since most assembly languages have a one-to-one correspondence with underlying machine instructions, the process of disassembly is relatively straight-forward, and a basic disassembler can often be implemented simply by reading in bytes, and performing a table lookup. Where an assembler converts code written in an assembly language into binary machine code, a disassembler reverses the process and attempts to recreate the assembly code from the binary machine code. In essence, a disassembler is the exact opposite of an assembler. Wikipedia has related information at Disassembler 5.1.2 parameters after the call instruction.5.1.1 jump tables and other calculated jumps.2.3 Commercial Freeware/Shareware Windows Disassemblers.If you are a seasoned reverser, disassembly sometimes tends to be "clearer" (albeit less convenient) the more experience you have. The same holds for decompilation results of Hopper. Being more acquainted with disassemblers I actually found results of Hex-Rays confusing and ambiguous in many cases in the past. Last but not least a note about decompilers. Although I come from the other side, I think someone starting with Hopper will benefit from it when later going professional and switching to paid IDA. A lot of the features in Hopper have different shortcuts or slightly different work flows, but one can clearly see how the author must be aware of IDA and recent developments in IDA (notably since about IDA version 5.0). However, the biggest - by far - disadvantage for me is the "learning curve". It is being improved all the time, so you'll be able to get feature updates. There are a few things to consider: do you look for a decompiler or a disassembler and what's your budget? From daily use I'd say that the disassembler for x86 and 圆4 is pretty much equivalent for ELF (Linux) and PE (Windows) files from my point of view.Īll features in Hopper seem to function as well as you'd expect from a fairly new product (meaning the time of development that went into it overall) and the price tag. If someone wants to start with reverse engineering, I am clearly recommending IDA Freeware for those that work only with Windows PE files (and outside a commercial context) and Hopper if the hobbyist is willing to shell out a few bucks. Indeed, I can confirm that the decompiler is more simplistic than even the Hex-Rays decompiler in its beta some years back (I have never used it again since then). Given the price tag, Hopper is well worth the purchase. It supports a wider ranger of processors, has more loaders and a plugin system as well as two powerful scripting languages (IDC/Python). It depends what you want to do, what budget you have and whether it's hobby or professional.Ĭlearly, IDA is more powerful in most aspects. I am using IDA for about 10 years and I have been using Hopper for a few months (on Kubuntu and Windows).
0 Comments
Leave a Reply. |
Details
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |