pysemble

Python Inline Assembler

Use i386 assembly inside Python without calling an external program. Python integers and ctype values can be referenced inside the assembly just like C.

Example

import pysemble
from ctypes import *

MessageBoxAddress = pysemble.get_function_address("user32.MessageBoxA")
register = c_int()

MessageBox = pysemble.assemble_function(c_int, [(c_char_p, "msg")],
"""
push 0x30
push 0
push dword msg
push 0
call MessageBoxAddress
mov [register],eax
ret
""")

MessageBox('hello world 123')
print register

Why Pysemble

There are quite a few "pyasm" projects on the Internet already but they all had shortcomings. Here is why Pysemble is better.

• Doesn't call an external program.
• Supports all instructions thanks to FASM.
• Allows referencing python variables.
• Creates a callable function.

Requirements

Python with ctypes. Currently supports i386 on Windows only. It can be ported to Linux if you can port FASM.