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import os
import logging
from argparse import ArgumentParser
from pdb import pm
from miasm2.analysis.binary import Container
from miasm2.core.asmbloc import log_asmbloc, asm_label, bloc2graph
from miasm2.expression.expression import ExprId
from miasm2.core.interval import interval
from miasm2.analysis.machine import Machine
log = logging.getLogger("dis")
console_handler = logging.StreamHandler()
console_handler.setFormatter(logging.Formatter("%(levelname)-5s: %(message)s"))
log.addHandler(console_handler)
log.setLevel(logging.INFO)
filename = os.environ.get('PYTHONSTARTUP')
if filename and os.path.isfile(filename):
execfile(filename)
parser = ArgumentParser("Disassemble a binary")
parser.add_argument('filename', help="File to disassemble")
parser.add_argument('address', help="Starting address for disassembly engine",
nargs="*")
parser.add_argument('-m', '--architecture', help="architecture: " + \
",".join(Machine.available_machine()))
parser.add_argument('-f', "--followcall", action="store_true",
help="Follow call instructions")
parser.add_argument('-b', "--blockwatchdog", default=None, type=int,
help="Maximum number of basic block to disassemble")
parser.add_argument('-n', "--funcswatchdog", default=None, type=int,
help="Maximum number of function to disassemble")
parser.add_argument('-r', "--recurfunctions", action="store_true",
help="Disassemble founded functions")
parser.add_argument('-v', "--verbose", action="store_true", help="Verbose mode")
parser.add_argument('-g', "--gen_ir", action="store_true",
help="Compute the intermediate representation")
parser.add_argument('-z', "--dis-nulstart-block", action="store_true",
help="Do not disassemble NULL starting block")
parser.add_argument('-l', "--dontdis-retcall", action="store_true",
help="If set, disassemble only call destinations")
parser.add_argument('-s', "--simplify", action="store_true",
help="Use the liveness analysis pass")
parser.add_argument('-o', "--shiftoffset", default=None,
type=lambda x: int(x, 0),
help="Shift input binary by an offset")
parser.add_argument('-a', "--try-disasm-all", action="store_true",
help="Try to disassemble the whole binary")
parser.add_argument('-i', "--image", action="store_true",
help="Display image representation of disasm")
args = parser.parse_args()
if args.verbose:
log_asmbloc.setLevel(logging.DEBUG)
log.info('Load binary')
with open(args.filename) as fdesc:
cont = Container.from_stream(fdesc, addr=args.shiftoffset)
default_addr = cont.entry_point
bs = cont.bin_stream
e = cont.executable
log.info('ok')
log.info("import machine...")
# Use the guessed architecture or the specified one
arch = args.architecture if args.architecture else cont.arch
if not arch:
print "Architecture recognition fail. Please specify it in arguments"
exit(-1)
# Instance the arch-dependent machine
machine = Machine(arch)
mn, dis_engine = machine.mn, machine.dis_engine
ira, ir = machine.ira, machine.ir
log.info('ok')
mdis = dis_engine(bs)
# configure disasm engine
mdis.dontdis_retcall = args.dontdis_retcall
mdis.blocs_wd = args.blockwatchdog
mdis.dont_dis_nulstart_bloc = not args.dis_nulstart_block
mdis.follow_call = args.followcall
todo = []
addrs = [int(a, 0) for a in args.address]
if len(addrs) == 0 and default_addr is not None:
addrs.append(default_addr)
for ad in addrs:
todo += [(mdis, None, ad)]
done = set()
all_funcs = set()
all_funcs_blocs = {}
done_interval = interval()
finish = False
# Main disasm loop
while not finish and todo:
while not finish and todo:
mdis, caller, ad = todo.pop(0)
if ad in done:
continue
done.add(ad)
ab = mdis.dis_multibloc(ad)
log.info('func ok %.16x (%d)' % (ad, len(all_funcs)))
all_funcs.add(ad)
all_funcs_blocs[ad] = ab
for b in ab:
for l in b.lines:
done_interval += interval([(l.offset, l.offset + l.l)])
if args.funcswatchdog is not None:
args.funcswatchdog -= 1
if args.recurfunctions:
for b in ab:
i = b.get_subcall_instr()
if not i:
continue
for d in i.getdstflow(mdis.symbol_pool):
if not (isinstance(d, ExprId) and isinstance(d.name, asm_label)):
continue
todo.append((mdis, i, d.name.offset))
if args.funcswatchdog is not None and args.funcswatchdog <= 0:
finish = True
if args.try_disasm_all:
for a, b in done_interval.intervals:
if b in done:
continue
log.debug('add func %s' % hex(b))
todo.append((mdis, None, b))
# Generate dotty graph
all_blocs = []
for blocs in all_funcs_blocs.values():
all_blocs += blocs
# for b in blocs:
# print b
log.info('generate graph file')
g = bloc2graph(all_blocs, True)
open('graph_execflow.dot', 'w').write(g)
log.info('generate intervals')
all_lines = []
total_l = 0
print done_interval
if args.image:
log.info('build img')
done_interval.show()
for i, j in done_interval.intervals:
log.debug((hex(i), "->", hex(j)))
all_lines.sort(key=lambda x: x.offset)
open('lines.dot', 'w').write('\n'.join([str(l) for l in all_lines]))
log.info('total lines %s' % total_l)
# Bonus, generate IR graph
if args.gen_ir:
log.info("generating IR and IR analysis")
ir_arch = ir(mdis.symbol_pool)
ir_arch_a = ira(mdis.symbol_pool)
ir_arch.blocs = {}
ir_arch_a.blocs = {}
for ad, all_bloc in all_funcs_blocs.items():
log.info("generating IR... %x" % ad)
for b in all_bloc:
ir_arch_a.add_bloc(b)
ir_arch.add_bloc(b)
log.info("Print blocs (without analyse)")
for label, bloc in ir_arch.blocs.iteritems():
print bloc
log.info("Gen Graph... %x" % ad)
log.info("Print blocs (with analyse)")
for label, bloc in ir_arch_a.blocs.iteritems():
print bloc
if args.simplify:
ir_arch_a.dead_simp()
out = ir_arch_a.graph.dot()
open('graph_irflow.dot', 'w').write(out)
out = ir_arch.graph.dot()
open('graph_irflow_raw.dot', 'w').write(out)
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