![]() The latest version runs as a console GUI program on Windows, but there are versions compiled for Linux as well. HT Editor An analyzing disassembler for Intel x86 instructions. Free for non-commercial use.īORG Disassembler BORG is an excellent Win32 Disassembler with GUI. It can disassemble instructions for those processors available as of 2003. IDA Pro Freeware Behaves almost exactly like IDA Pro, but disassembles only Intel x86 opcodes and is Windows-only. It can disassemble code for the Z80, 6502, Intel 8051, Intel i860, and PDP-11 processors, as well as x86 instructions up to the 486. IDA 3.7 A DOS GUI tool that behaves very much like IDA Pro, but is considerably more limited. Latest instruction set (SSE4, AVX, XOP, FMA, etc.), several object file formats, several assembly syntax dialects. Objconv A command line disassembler supporting 16, 32, and 64 bit x86 code. It does not offer disassembler features such as linear sweep or recursive disassembling. Zydis Fast and lightweight x86/x86-64 decoder library. (official website) (plugins) (64 bit version) Free Windows Disassemblers Capstone Capstone is an open source disassembly framework for multi-arch (including support for x86, x86_64) & multi-platform with advanced features. Supports x86 instructions only (no x86_64 support for now, although it is on the way). It has a large community and a wide variety of plugins available. Commercial Freeware/Shareware Windows Disassemblers OllyDbg OllyDbg is one of the most popular disassemblers recently. Single license pricing is $19, and $199 with lifetime updates. ![]() Introductory pricing is $99 for student/non-commercial use, and $399 for commercial use. A precursor written in python is open source and available at. Binary Ninja Binary Ninja is a commercial, cross-platform (Linux, OS X, Windows) reverse engineering platform with aims to offer a similar feature set to IDA at a much cheaper price point. ![]() the website went down and no replacement went up. the latest version available is from 2003. PE Explorer is a disassembler that "focuses on ease of use, clarity and navigation." It isn't as feature-filled as IDA Pro and carries a smaller price tag to offset the missing functionality: $130 W32DASM (Win32dasm) W32DASM was an excellent 16/32 bit disassembler for Windows, it seems it is no longer developed. OBJ2ASM is an object file disassembler for 16 and 32 bit x86 object files in Intel OMF, Microsoft COFF format, Linux ELF or Mac OS X Mach-O format. It can also disassemble and decompile Windows executables. Hopper Disassembler is a reverse engineering tool for the Mac, that lets you disassemble, decompile and debug 32/64bits Intel Mac executables. Relyze Desktop is an interactive software reverse engineering tool that lets you disassemble, decompile and diff x86, 圆4, ARM32 and ARM64 software. As such this wikibook will not consider IDA Pro specifically because the price tag is exclusionary. The downside to IDA Pro is that it costs $515 US for the standard single-user edition. Commercial Windows Disassemblers IDA Pro is a professional disassembler that is expensive, extremely powerful, and has a whole slew of features. The site is currently in beta release but will hopefully only get better with time. 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
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