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import os
import sys
from miasm2.expression.expression import *
from miasm2.expression.simplifications import expr_simp
from miasm2.arch.x86.ira import ir_a_x86_32
from miasm2.arch.x86.arch import mn_x86
from miasm2.core import asmbloc
from miasm2.core.bin_stream import bin_stream_str
from elfesteem import pe_init
from optparse import OptionParser
from pdb import pm
from miasm2.ir.ir import ir
from miasm2.arch.x86.regs import *
from miasm2.arch.x86.disasm import dis_x86_32
from miasm2.analysis.data_analysis import intra_bloc_flow_raw, inter_bloc_flow
from miasm2.core.graph import DiGraph
from miasm2.ir.symbexec import symbexec
from pprint import pprint as pp
filename = os.environ.get('PYTHONSTARTUP')
if filename and os.path.isfile(filename):
execfile(filename)
print """
Simple expression use for generating dataflow graph
Exemple:
python manip_expression4.py sc_connect_back.bin 0x2e
"""
parser = OptionParser(usage="usage: %prog [options] sc_connect_back.bin")
(options, args) = parser.parse_args(sys.argv[1:])
if len(args) != 2:
parser.print_help()
sys.exit(0)
def node_x_2_id(n, x):
return hash(str(n) + str(x)) & 0xffffffffffffffff
def get_node_name(label, i, n):
# n_name = "%s_%d_%s"%(label.name, i, n)
n_name = (label.name, i, n)
return n_name
def get_modified_symbols(sb):
# get modified IDS
ids = sb.symbols.symbols_id.keys()
ids.sort()
out = {}
for i in ids:
if i in sb.arch.regs.regs_init and \
i in sb.symbols.symbols_id and \
sb.symbols.symbols_id[i] == sb.arch.regs.regs_init[i]:
continue
# print i, sb.symbols.symbols_id[i]
out[i] = sb.symbols.symbols_id[i]
# get mem IDS
mems = sb.symbols.symbols_mem.values()
for m, v in mems:
print m, v
out[m] = v
pp([(str(x[0]), str(x[1])) for x in out.items()])
return out
def intra_bloc_flow_symb(my_ir, flow_graph, irbloc):
symbols_init = {}
for i, r in enumerate(all_regs_ids):
symbols_init[r] = all_regs_ids_init[i]
sb = symbexec(mn_x86, symbols_init)
sb.emulbloc(irbloc)
print '*' * 40
print irbloc
# sb.dump_mem()
# sb.dump_id()
in_nodes = {}
out_nodes = {}
out = get_modified_symbols(sb)
current_nodes = {}
# gen mem arg to mem node links
for dst, src in out.items():
for n in [dst, src]:
all_mems = set()
all_mems.update(get_expr_mem(n))
for n in all_mems:
node_n_w = get_node_name(irbloc.label, 0, n)
if not n == src:
continue
o_r = n.arg.get_r(mem_read=False, cst_read=True)
for n_r in o_r:
if n_r in current_nodes:
node_n_r = current_nodes[n_r]
else:
node_n_r = get_node_name(irbloc.label, i, n_r)
if not n_r in in_nodes:
in_nodes[n_r] = node_n_r
flow_graph.add_uniq_edge(node_n_r, node_n_w)
# gen data flow links
for dst, src in out.items():
nodes_r = src.get_r(mem_read=False, cst_read=True)
nodes_w = set([dst])
for n_r in nodes_r:
if n_r in current_nodes:
node_n_r = current_nodes[n_r]
else:
node_n_r = get_node_name(irbloc.label, 0, n_r)
if not n_r in in_nodes:
in_nodes[n_r] = node_n_r
flow_graph.add_node(node_n_r)
for n_w in nodes_w:
node_n_w = get_node_name(irbloc.label, 1, n_w)
out_nodes[n_w] = node_n_w
flow_graph.add_node(node_n_w)
flow_graph.add_uniq_edge(node_n_r, node_n_w)
irbloc.in_nodes = in_nodes
irbloc.out_nodes = out_nodes
def node2str(self, n):
label, i, node = n
# print n
out = "%s,%s\\l\\\n%s" % n
return out
def gen_bloc_data_flow_graph(my_ir, in_str, ad): # arch, attrib, pool_bin, bloc, symbol_pool):
out_str = ""
# my_ir = ir_x86_32(symbol_pool)
for irbloc in my_ir.blocs.values():
print irbloc
my_ir.gen_graph()
my_ir.dead_simp()
irbloc_0 = None
for irbloc in my_ir.blocs.values():
if irbloc.label.offset == ad:
irbloc_0 = irbloc
break
assert(irbloc_0 is not None)
flow_graph = DiGraph()
flow_graph.node2str = lambda n: node2str(flow_graph, n)
done = set()
todo = set([irbloc_0.label])
bloc2w = {}
for irbloc in my_ir.blocs.values():
intra_bloc_flow_raw(my_ir, flow_graph, irbloc)
# intra_bloc_flow_symb(my_ir, flow_graph, irbloc)
for irbloc in my_ir.blocs.values():
print irbloc
print 'IN', [str(x) for x in irbloc.in_nodes]
print 'OUT', [str(x) for x in irbloc.out_nodes]
print '*' * 20, 'interbloc', '*' * 20
inter_bloc_flow(my_ir, flow_graph, irbloc_0.label)
# sys.path.append('/home/serpilliere/projet/m2_devel/miasm2/core')
# from graph_qt import graph_qt
# graph_qt(flow_graph)
open('data.txt', 'w').write(flow_graph.dot())
data = open(args[0]).read()
ad = int(args[1], 16)
print 'disasm...'
mdis = dis_x86_32(data)
mdis.follow_call = True
ab = mdis.dis_multibloc(ad)
print 'ok'
print 'generating dataflow graph for:'
my_ir = ir_a_x86_32(mdis.symbol_pool)
blocs = ab
for bloc in blocs:
print bloc
my_ir.add_bloc(bloc)
for irbloc in my_ir.blocs.values():
print irbloc
if irbloc.label.offset != 0:
continue
out_str = gen_bloc_data_flow_graph(my_ir, mdis.bs, ad)
print '*' * 40
print """
View with:
dotty dataflow.txt
or
Generate ps with pdf:
dot -Tps dataflow_xx.txt -o graph.ps
"""
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