Assembler library for .NET, assembling runtime-variable strings into machine code for injection

Question

Is there such a thing as an x86 assembler that I can call through C#? I want to be able to pass x86 instructions as a string and get a byte array back. If one doesn\'t exist

Answer 1

See this project:

https://github.com/ZenLulz/MemorySharp

This project wraps the FASM assembler, which is written in assembly and as a compiled as Microsoft coff object, wrapped by a C++ project, and then again wrapped in C#. This can do exactly what you want: given a string of x86/x64 assembly, this will produce the bytes needed.

If you require the opposite, there is a port of the Udis86 disassembler, fully ported to C#, here:

https://github.com/spazzarama/SharpDisasm

This will convert an array of bytes into the instruction strings for x86/x64