搜索“动态调试工具”搜到了“OllyDbg”

1 OllyDbg 

OllyDbg is a 32-bit assembler level analysing debugger for Microsoft® Windows®. Emphasis on binary code analysis makes it particularly useful in cases where source is unavailable. OllyDbg is a shareware, but you can download and use it for free.

OllyDbg 是一个32位汇编级分析调试器，不过貌似有win 64位的。至少笔者在win7 32bits下，成功的使用OllyDbg单步调试了一个win32 控制台测试程序。

2 80x86 32-bit Disassembler and Assembler

Disassembler understands all standard 80x86 commands, FPU, MMX, AMD's MMX extensions, Athlon/PIII MMX extensions and 3DNow! instructions. It does not decode SSI or SSI2 commands. Disassembler assumes 32 bit code and data segments but correctly decodes prefixed 16-bit commands. Several decoding modes allow you to select the amount of returned information (which is inversely proportional to execution speed): command length only, basic information useful for code analysis, or full decoding with dump and assembler form. Multiple options select desired format. Disassembler and Assembler support both MASM and Borland's IDEAL modes.

Assembler converts single command from the ASCII form to the binary code. It allows to find several possible encodings, or even to create search patterns with undefined operands. 

OllyDbg 使用到的Disassembler和Assembler的stripped版源代码是公开的，具体参考一下描述：

This package includes source code of 32-bit Disassembler and 32-bit single line Assembler for 80x86-compatible processors. The source is a slightly stripped version of code used in OllyDbg v1.04 and is well proven by its numerous users. (If you haven't heard before, OllyDbg is a 32-bit Assembler level debugger with powerful analyzing capabilities that makes binary machine code understandable).