freeze.py disassemble

freeze.py is a tool used to make a standalone binary out of a python script.

freezedis.py is a tool I put together to parse the elf binary and pull the python code back out, recreating the .pyc file. For now, it does not support stripped binaries.

$ more hello.py
#!/usr/bin/env python
import sys

def main(argc, argv):
    print "hello"

if __name__ == "__main__":
    main(len(sys.argv), sys.argv)

$ /usr/share/doc/python2.5/examples/Tools/freeze/freeze.py hello.py
...
$ make
$ file hello
hello: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), for GNU/Linux 2.6.8,
dynamically linked (uses shared libs), not stripped

$ freezedis.py 
Usage: freezedis.py [options] filename
 -o filename.pyc (defaults to a.pyc, appends .pyc if not included)
 -d dump disassembly of newly created pyc

$ freezedis.py -d hello
  2           0 LOAD_CONST               0 (-1)
              3 LOAD_CONST               1 (None)
              6 IMPORT_NAME              0 (sys)
              9 STORE_NAME               0 (sys)

  4          12 LOAD_CONST               2 ()
             15 MAKE_FUNCTION            0
             18 STORE_NAME               1 (main)

  7          21 LOAD_NAME                2 (__name__)
             24 LOAD_CONST               3 ('__main__')
             27 COMPARE_OP               2 (==)
             30 JUMP_IF_FALSE           29 (to 62)
             33 POP_TOP             

  8          34 LOAD_NAME                1 (main)
             37 LOAD_NAME                3 (len)
             40 LOAD_NAME                0 (sys)
             43 LOAD_ATTR                4 (argv)
             46 CALL_FUNCTION            1
             49 LOAD_NAME                0 (sys)
             52 LOAD_ATTR                4 (argv)
             55 CALL_FUNCTION            2
             58 POP_TOP             
             59 JUMP_FORWARD             1 (to 63)
        >>   62 POP_TOP             
        >>   63 LOAD_CONST               1 (None)
             66 RETURN_VALUE        
Disassembly of main:
  5           0 LOAD_CONST               1 ('hello')
              3 PRINT_ITEM          
              4 PRINT_NEWLINE       
              5 LOAD_CONST               0 (None)
              8 RETURN_VALUE