identify_string_decoders.py 文件源码

def find_tight_loops(fva):
    """ Code from Willi Ballenthin """
    tight_loops = []
    function = idaapi.get_func(fva)
    for bb in idaapi.FlowChart(function):
        # bb.endEA is the first addr not in the basic block
        bb_end = idc.PrevHead(bb.endEA)
        for x in idautils.XrefsFrom(bb_end):
            if x.to == bb.startEA and bb.startEA < bb_end:
                tight_loops.append((bb.startEA, bb_end))
    if tight_loops:
        g_logger.debug("Tight loops in 0x%x: %s", fva, ["0x%x - 0x%x" % (s, e) for (s, e) in tight_loops])
    return tight_loops