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Example: add a basic symbol_exec example
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from __future__ import print_function | ||
from argparse import ArgumentParser | ||
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from future.utils import viewvalues | ||
from miasm.analysis.binary import Container | ||
from miasm.analysis.machine import Machine | ||
from miasm.core.locationdb import LocationDB | ||
from miasm.ir.symbexec import SymbolicExecutionEngine | ||
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parser = ArgumentParser("Simple SymbolicExecution demonstrator") | ||
parser.add_argument("target_binary", help="Target binary path") | ||
parser.add_argument("--address", help="Starting address for emulation. If not set, use the entrypoint") | ||
parser.add_argument("--steps", help="Log emulation state after each instruction", action="store_true") | ||
options = parser.parse_args() | ||
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################################################################### | ||
# Common section from example/disam/dis_binary_lift_model_call.py # | ||
################################################################### | ||
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fdesc = open(options.target_binary, 'rb') | ||
loc_db = LocationDB() | ||
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cont = Container.from_stream(fdesc, loc_db) | ||
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machine = Machine(cont.arch) | ||
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mdis = machine.dis_engine(cont.bin_stream, loc_db=cont.loc_db) | ||
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addr = cont.entry_point if options.address is None else int(options.address, 0) | ||
asmcfg = mdis.dis_multiblock(addr) | ||
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lifter = machine.lifter_model_call(mdis.loc_db) | ||
ircfg = lifter.new_ircfg_from_asmcfg(asmcfg) | ||
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##################################### | ||
# End common section # | ||
##################################### | ||
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# Instantiate a Symbolic Execution engine with default value for registers | ||
symb = SymbolicExecutionEngine(lifter) | ||
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# Emulate until the next address cannot be resolved (`ret`, unresolved condition, etc.) | ||
cur_addr = symb.run_at(ircfg, addr, step=options.steps) | ||
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# Modified elements | ||
print('Modified registers:') | ||
symb.dump(mems=False) | ||
print('Modified memory (should be empty):') | ||
symb.dump(ids=False) |
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