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import sys
import os
import time
from miasm2.core.bin_stream import bin_stream_elf, bin_stream_pe, bin_stream_str
from elfesteem import *
from miasm2.core.asmbloc import *
from miasm2.expression.simplifications import expr_simp
from optparse import OptionParser
from miasm2.core.cpu import dum_arg
from miasm2.expression.expression import *
from miasm2.core.interval import interval
from miasm2.analysis.machine import Machine
from pdb import pm
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 = OptionParser(usage="usage: %prog [options] file address")
parser.add_option('-m', "--architecture", dest="machine", metavar="MACHINE",
help="architecture: " + ",".join(Machine.available_machine()))
parser.add_option('-f', "--followcall", dest="followcall", action="store_true",
default=False,
help="follow call")
parser.add_option('-b', "--blocwatchdog", dest="bw",
default=None,
help="address to disasemble")
parser.add_option('-n', "--funcsnumwatchdog", dest="funcswd",
default=None,
help="max func to disasm")
parser.add_option(
'-r', "--recurfunctions", dest="recurfunctions", action="store_true",
default=False,
help="disasm found functions")
parser.add_option('-v', "--verbose", dest="verbose", action="store_true",
default=False,
help="verbose")
parser.add_option('-g', "--gen_ir", dest="gen_ir", action="store_true",
default=False,
help="gen intermediate representation")
parser.add_option('-z', "--dis_nulstart_bloc", dest="dis_nulstart_bloc",
action="store_true", default=False,
help="dont_dis_nulstart_bloc")
parser.add_option('-l', "--dontdis_retcall", dest="dontdis_retcall",
action="store_true", default=False,
help="only disasm call dst")
parser.add_option('-s', "--simplify", dest="simplify", action="store_true",
default=False,
help="for test purpose")
parser.add_option('-o', "--shiftoffset", dest="shiftoffset",
default=None,
help="shift input str by offset")
parser.add_option(
'-a', "--trydisasmall", dest="trydisasmall", action="store_true",
default=False,
help="try disasm all binary")
parser.add_option('-i', "--image", dest="image", action="store_true",
default=False,
help="display image representation of disasm")
(options, args) = parser.parse_args(sys.argv[1:])
if not args:
parser.print_help()
sys.exit(0)
fname = args[0]
if options.verbose:
log_asmbloc.setLevel(logging.DEBUG)
log.info("import machine...")
machine = Machine(options.machine)
mn, dis_engine, ira = machine.mn, machine.dis_engine, machine.ira
log.info('ok')
if options.bw != None:
options.bw = int(options.bw)
if options.funcswd != None:
options.funcswd = int(options.funcswd)
log.info('load binary')
b = open(fname).read()
default_addr = 0
bs = None
if b.startswith('MZ'):
try:
e = pe_init.PE(b)
if e.isPE() and e.NTsig.signature_value == 0x4550:
bs = bin_stream_pe(e.virt)
default_addr = e.rva2virt(e.Opthdr.AddressOfEntryPoint)
except:
log.error('Cannot read PE!')
elif b.startswith('\x7fELF'):
try:
e = elf_init.ELF(b)
bs = bin_stream_elf(e.virt)
default_addr = e.Ehdr.entry
except:
log.error('Cannot read ELF!')
if bs is None or options.shiftoffset is not None:
if options.shiftoffset is None:
options.shiftoffset = "0"
shift = int(options.shiftoffset, 16)
log.warning('fallback to string input (offset=%s)' % hex(shift))
bs = bin_stream_str(b, shift=shift)
log.info('ok')
mdis = dis_engine(bs)
# configure disasm engine
mdis.dontdis_retcall = options.dontdis_retcall
mdis.blocs_wd = options.bw
mdis.dont_dis_nulstart_bloc = not options.dis_nulstart_bloc
todo = []
addrs = [int(a, 16) for a in args[1:]]
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 options.funcswd is not None:
options.funcswd -= 1
if options.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 options.funcswd is not None and options.funcswd <= 0:
finish = True
if options.trydisasmall:
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.txt', 'w').write(g)
log.info('generate intervals')
all_lines = []
total_l = 0
print done_interval
if options.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.txt', 'w').write('\n'.join([str(l) for l in all_lines]))
log.info('total lines %s' % total_l)
# Bonus, generate IR graph
if options.gen_ir:
log.info("generating IR")
my_ir = ira(mdis.symbol_pool)
my_ir.blocs = {}
for ad, all_bloc in all_funcs_blocs.items():
log.info("generating IR... %x" % ad)
for b in all_bloc:
my_ir.add_bloc(b)
log.info("Gen Graph... %x" % ad)
my_ir.gen_graph()
if options.simplify:
my_ir.dead_simp()
out = my_ir.graph()
open('graph_irflow.txt', 'w').write(out)
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