'Arguments:
elfs(list): List of :class:`.ELF` objects for mining'

def __init__(self, elfs, base=None, **kwargs):

    import ropgadget
    if isinstance(elfs, ELF):
        elfs = [elfs]
    elif isinstance(elfs, (str, unicode)):
        elfs = [ELF(elfs)]
    self.elfs = elfs
    self._chain = []
    self.base = base
    self.migrated = False
    self.__load()
