I have a test script that seems to be getting where I want, but having
an issue with swig and accesing the source information for an
instruction. Here is the simple script:
-----------------
import sys, os, struct
from r2 import r_core
def main():
fname = sys.argv[1]
start = int(sys.argv[2], 16)
rc = r_core.RCore()
rc.file_open(fname, 0, 0)
rc.bin_load("")
rc.anal_all()
end = start + 40
while start < end:
a_op = rc.op_anal(start)
if a_op.length == 0:
print "0 len instr at %d" % start
break
print dir(a_op.src)
print a_op.src[0]
start = start + a_op.length
if __name__ == "__main__":
main()
---------
Which outputs:
# python gen.py test 0x4004e4
['__class__', '__cmp__', '__delattr__', '__doc__', '__eq__',
'__format__', '__ge__', '__getattribute__', '__gt__', '__hash__',
'__hex__', '__init__', '__int__', '__le__', '__long__', '__lt__',
'__ne__', '__new__', '__oct__', '__reduce__', '__reduce_ex__',
'__repr__', '__setattr__', '__sizeof__', '__str__',
'__subclasshook__', 'acquire', 'append', 'disown', 'next', 'own']
Traceback (most recent call last):
File "gen.py", line 30, in <module>
main()
File "gen.py", line 25, in main
print a_op.src[0]
TypeError: 'SwigPyObject' object is unsubscriptable
So I googled how to access array indexes in Swig objects and it seems
like the package needs to define access to them through get & set
functions. I tried looking for radare's version of these but could not
find them. Should I try to write my own or are they just somewhere I
could not find?
Thanks for all the help!
On Thu, Jul 18, 2013 at 10:00 PM, Andrew Case <[email protected]> wrote:
I am still going through the files you pointed to, but I want this
option from your email:
"Do you want to use rasm api by providing its bytes"
Basically pass in a chunk of bytes and then have it disassembled with
the instruction/opcode context
On Wed, Jul 17, 2013 at 12:59 PM, pancake <[email protected]> wrote:
Hi andrew, been busy irl.
Sorry for the readme false hint. Will fix soon.
You may like to read bokken source code as another source for python
examples using r2 api.
Do you want to use rasm api by providing its bytes or just read binaries
with rcore like r2 does and call rasm api obeying the rules imposed by rbin
(arch/os/bits) and rio maps/sections?
Im answering from phone right now, but you may find the test-asm.py
example which should assemble and disassemble an opcode. Just change the
arch to arm and bits to 16, 32 or 64.
Ranal is used to analyze code. This is: extract low level information
from the opcode.
To assemble/Disaseemble you should use the rasm api.
Nope, the full r2 api is binded with ctypes and swig. No textual parsing
is required. The radare.py is there for historic reasons, but it shouldnt be
used for any serious task.
I'll try to type some more examples and will commit them, so you can
check them for your needs.
On Jul 16, 2013, at 7:07, Andrew Case <[email protected]> wrote:
Thanks. Using the git version and the sys/python.sh I was able to get
it installed with the Python bindings.
Also, I got the --enable-devel and general process from the README
file and its still mentioned in the last version of that file.
And, I had another question(s) that hopefully you could help with.
What I really want to use radare for is disasm of ARM instructions
through python scripting. I am having trouble figuring out how to get
it to work though..
I have read the documents for libr (e.g.
http://radare.org/vdoc/libr/Radare.RAnal.Op.html ) and I see there are
classes defined for them, but after grepping through the source code
and using dir() throughout different parts of r2 python bindings, I
still cannot find what I am supposed to be using.
From what I see of other scripts throughout the git checkout, it seems
like much of the python scripting is just calling out to radare and
then getting back the text output. Is that the correct way to use it
or is there a structured/API for the Python use?
The only thing I really found close was "libr/lang/p/radare.py", but
this seems to be based on radare v1.
If you could just point me to the correct documents and some sample
code to get the process started with the latest version of radare that
would be great.
On Mon, Jul 15, 2013 at 10:01 AM, pancake <[email protected]> wrote:
Various comments here:
- in debian/arch/void/gentoo there are binary packages for those
bindings (i
also built a version for windows too)
- it's recommended to use git version
- enable-devel is deprecated
- bindings are inside r2-bindings subdirectory
- r.py is just a r_core_cmd() wrapper api, not real api, just parses
commands text instead.
- current git have two different implementation of the python
bindings, both
based on valabind (ctypes and swig)
- both implementations should be compatible and same code should run
on both
- there are scripts in sys/*.sh to automate those builds
- You may like to run sys/python.sh
- the bindings are compiled by the farm (see bin.rada.re and
ci.rada.re)
- "import radare" are the old text-based bindings for radare1
- see r2-bindings/python/test-*.py to see some code examples.
- if you want to build bindings for windows see doc/windows
Hope this helps :)
Here's a sample program:
from r2.r_bin import *
b = RBin ()
b.load ("/bin/ls", False)
baddr= b.get_baddr ()
print '-> Sections'
for i in b.get_sections ():
print 'offset=0x%08x va=0x%08x size=%05i %s' % (
i.offset, baddr+i.rva, i.size, i.name)
On 07/15/13 04:20, Andrew Case wrote:
Hello,
I have compiled radare with python bindings following the
instructions
in the source code:
./configure --prefix=/usr --enable-devel --enable=python
but I cannot import radare as it will error with being unable to find
a module named 'r', which from reading docs and source code seems to
be the module that drives everything.
I did a search across disk and could not find a "r.py" file.
Is there other documentation I should be following?
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