def __relocate__(self, data, symbol, section, namespace=None):
'''Apply relocations for the specified ``symbol`` to the ``data``.'''
namespace = namespace or {}
# figure out the relocation information
relocationva, relocationtype = self['VirtualAddress'].int(), self['Type'].int()
# figure out the symbol type
storageclass = symbol['StorageClass'].int()
# get the symbol name so that it can be looked up against the namespace
name = symbol['Name'].str()
# lookup the symbol's value in the namespace first...otherwise, use what was actually assigned in the symbol table
value = namespace.get(name, symbol['Value'].int())
# extract the value that's already encoded within the section's data
result = ptypes.bitmap.zero
generator = ( bitmap.new(ch, 8) for ch in data[relocationva : relocationva + 4] )
for x in generator:
result = bitmap.insert(result, x)
result = bitmap.int(result)
currentva = relocationva + 4
# FIXME: figure out the machine type in order to determine the relocation types and how to apply them
# XXX: this is only for x86
# figure out where to get the relocation's value from based on the relocation type
if section is None: # externally defined
result = value
elif relocationtype == 0:
pass
# XXX: will these relocations work?
elif relocationtype == 6: # 32-bit VA
result = (value+result)
# print '>',name,hex(result),targetsectionname,hex(namespace[targetsectionname])
elif relocationtype == 0x14: # 32-bit relative displacement
result = (value+result+4) - (currentva)
#raise NotImplementedError(relocationtype)
elif relocationtype == 7: # use real virtual address (???)
result = value
elif relocationtype in [0xA, 0xB]: # [section index, offset from section]
raise NotImplementedError(relocationtype)
else:
raise NotImplementedError(relocationtype)
# calculate relocation and assign it into an array
result, serialized = bitmap.new(result, 32), array.array('B','')
while result[1] > 0:
result, value = bitmap.consume(result, 8)
serialized.append(value)
# update segment data with new serialized relocation
if len(serialized) != 4:
raise AssertionError("Expected size of relocation was expected to be {:d} bytes : {:d} != {:d}".format(4, len(serialized), 4))
data[relocationva : relocationva + len(serialized)] = serialized
# we're done. so return it back to the user
return data
def encode(self, object, **kwds):
szone,pu = self.getparent(szone_t),object.get()
cookie = szone['cookie'].li.int()
csum = self.generate_checksum(pu^cookie)
t = bitmap.new(pu, object.size()*8)
t = bitmap.rol(t, 4)
cs = bitmap.new(bitmap.number(t)|csum, bitmap.size(t))
cs = bitmap.ror(cs, 4)
logging.info("{:s}.ptr_union.encode : Encoded pointer 0x{:x} with 0x{:x} results in checksum 0x{:x} : {:s}".format(__name__, pu, cookie, csum, bitmap.hex(cs)))
res = object.copy().set(bitmap.number(cs))
return super(ptr_union,self).encode(res, **kwds)
def set_bitmap_signed():
result = bitmap.new(0, -32)
freeslot = 0
count = 3
result = bitmap.set(result, freeslot, 1, count)
if bitmap.value(result) == 7:
raise Success
def _write(self, value):
res = bitmap.new(value, self.length * 8)
string = ""
while res[1] > 0:
res, value = bitmap.consume(res, 8)
string += chr(value)
return string
def set_bitmap_signed():
result = bitmap.new(0, -32)
freeslot = 0
count = 3
result = bitmap.set(result, freeslot, 1, count)
if bitmap.value(result) == 7:
raise Success
def set(self, string):
if string in self._values_.viewvalues():
res = dict((v, k) for k, v in self._values_.viewitems())
return self.set(res[string])
res = map(int, string.split('.'))
val = [res.pop(0)*40 + res.pop(0)]
for n in res:
if n <= 127:
val.append(n)
continue
# convert integer to a bitmap
x = bitmap.new(0,0)
while n > 0:
x = bitmap.insert(x, (n&0xf,4))
n //= 0x10
# shuffle bitmap into oid components
y = []
while bitmap.size(x) > 0:
x,v = bitmap.consume(x, 7)
y.insert(0, v)
val.extend([x|0x80 for x in y[:-1]] + [y[-1]])
return super(OBJECT_IDENTIFIER, self).set(str().join(map(six.int2byte, val)))
def __alloc_arena(self, elementsize, pages=1):
'''allocates an arena for elements of /elementsize/'''
allocator = self.allocator
size = allocator.getPageSize()*pages
pointer = allocator.getWriteable(None, pages)
res = bitmap.new(0, size / elementsize )
return (pointer, (int(elementsize), res))
def __alloc_arena(self, elementsize, pages=1):
'''allocates an arena for elements of /elementsize/'''
allocator = self.allocator
size = allocator.getPageSize() * pages
pointer = allocator.getWriteable(None, pages)
res = bitmap.new(0, size // elementsize)
return (pointer, (int(elementsize), res))
def write(self, integer, length):
'''Given the specified integer and its length, encode it into its little-endian form and return a string.'''
res = array.array('B')
binteger = bitmap.new(integer, 8 * length)
octets = bitmap.split(binteger, 8)
for item in reversed(octets):
res.append(bitmap.int(item))
return res.tostring()
def __relocate(self, data, symbol, sectionarray, currentsectionname, targetsectionname, namespace):
relocationva, relocationtype = self["VirtualAddress"].int(), self["Type"].num()
name = symbol["Name"].str()
storageclass, value = symbol["StorageClass"].num(), namespace[name]
if value is None:
raise ValueError("Attempted relocation for an undefined symbol `%s'." % name)
result = bitmap.new(0, 0)
generator = (bitmap.new(ord(x), 8) for x in data[relocationva : relocationva + 4])
for x in generator:
result = bitmap.insert(result, x)
result = result[0]
currentva = relocationva + 4
if targetsectionname is None: # externally defined
result = value
elif relocationtype == 0:
pass
# XXX: will these relocations work?
elif relocationtype == 6: # 32-bit VA
result = value + result
# print '>',name,hex(result),targetsectionname,hex(namespace[targetsectionname])
elif relocationtype == 0x14: # 32-bit relative displacement
result = (value + result + 4) - (currentva)
raise NotImplementedError(relocationtype)
elif relocationtype == 7: # use real virtual address (???)
result = value
elif relocationtype in [0xA, 0xB]: # [section index, offset from section]
raise NotImplementedError(relocationtype)
else:
raise NotImplementedError(relocationtype)
result, serialized = bitmap.new(result, 32), array.array("c", "")
while result[1] > 0:
result, value = bitmap.consume(result, 8)
serialized.append(chr(value))
assert len(serialized) == 4
data[relocationva : relocationva + len(serialized)] = serialized
return data
def encode(self, object, **kwds):
szone, pu = self.getparent(szone_t), object.get()
cookie = szone['cookie'].li.int()
csum = self.generate_checksum(pu ^ cookie)
t = bitmap.new(pu, object.size() * 8)
t = bitmap.rol(t, 4)
cs = bitmap.new(bitmap.number(t) | csum, bitmap.size(t))
cs = bitmap.ror(cs, 4)
logging.info(
"{:s}.ptr_union.encode : Encoded pointer 0x{:x} with 0x{:x} results in checksum 0x{:x} : {:s}"
.format(__name__, pu, cookie, csum, bitmap.hex(cs)))
res = object.copy().set(bitmap.number(cs))
return super(ptr_union, self).encode(res, **kwds)
def encodeInteger(number, bytes):
'''given an integer and a number of bytes, will return a string encoded in the native endianness'''
number &= (0x100**bytes) - 1 # convert to absolute using side-effect of &
counter = bitmap.new(number, bytes * 8)
res = ''
while counter[1] > 0:
counter, _ = bitmap.consume(counter, 8)
res += chr(_)
return res
def encodeInteger(number, bytes):
'''given an integer and a number of bytes, will return a string encoded in the native endianness'''
number &= (0x100**bytes) - 1 # convert to absolute using side-effect of &
counter = bitmap.new(number,bytes*8)
res = ''
while counter[1] > 0:
counter,_ = bitmap.consume(counter,8)
res += chr(_)
return res
def str(self):
data = map(ord, self.serialize())
res = [data[0] / 40, data.pop(0) % 40]
data = iter(data)
for n in data:
v = bitmap.new(0, 0)
while n & 0x80:
v = bitmap.push(v, (n & 0x7f, 7))
n = data.next()
v = bitmap.push(v, (n, 7))
res.append(bitmap.number(v))
return '.'.join(map(str, res))
def set_bitmap_unsigned():
x = bitmap.new(0xf000000000000000,64)
#x = bitmap.set(x, 60, count=4)
print bitmap.string(x)
y,res = bitmap.shift(x, 4)
print res,bitmap.string(y)
x = bitmap.new(0,0)
x = bitmap.push(x, (0x1,4) )
x = bitmap.push(x, (0x2,4) )
x = bitmap.push(x, (0x3,4) )
x = bitmap.push(x, (0x4,4) )
print x,bitmap.string(x)
x = bitmap.new(0,0)
x = bitmap.insert(x, (0x1,4) )
x = bitmap.insert(x, (0x2,4) )
x = bitmap.insert(x, (0x3,4) )
x = bitmap.insert(x, (0x4,4) )
print x,bitmap.string(x)
x = bitmap.consumer('\x12\x34')
print x.consume(4)
print x.consume(4)
print x.consume(4)
print x.consume(4)
x = bitmap.new(0, 4)
for i in six.moves.range(6):
print x
x = bitmap.add(x, 3)
for i in six.moves.range(6):
print x
x = bitmap.sub(x, 6)
x = bitmap.new(4,4)
print bitmap.string(bitmap.ror(bitmap.ror(bitmap.ror(x))))
def set_bitmap_unsigned():
x = bitmap.new(0xf000000000000000, 64)
#x = bitmap.set(x, 60, count=4)
print(bitmap.string(x))
y, res = bitmap.shift(x, 4)
print(res, bitmap.string(y))
x = bitmap.new(0, 0)
x = bitmap.push(x, (0x1, 4))
x = bitmap.push(x, (0x2, 4))
x = bitmap.push(x, (0x3, 4))
x = bitmap.push(x, (0x4, 4))
print(x, bitmap.string(x))
x = bitmap.new(0, 0)
x = bitmap.insert(x, (0x1, 4))
x = bitmap.insert(x, (0x2, 4))
x = bitmap.insert(x, (0x3, 4))
x = bitmap.insert(x, (0x4, 4))
print(x, bitmap.string(x))
x = bitmap.consumer(b'\x12\x34')
print(x.consume(4))
print(x.consume(4))
print(x.consume(4))
print(x.consume(4))
x = bitmap.new(0, 4)
for i in range(6):
print(x)
x = bitmap.add(x, 3)
for i in range(6):
print(x)
x = bitmap.sub(x, 6)
x = bitmap.new(4, 4)
print(bitmap.string(bitmap.ror(bitmap.ror(bitmap.ror(x)))))
def decode(self, object, **kwds):
szone,pu = self.getparent(szone_t),object.get()
cookie = szone['cookie'].li.int()
t = bitmap.new(pu, object.size()*8)
t = bitmap.rol(t, 4)
ptr = bitmap.number(t) & ~0xf
cs = ptr ^ cookie
if bitmap.number(t)&0xf != self.generate_checksum(cs):
logging.warn("{:s}.ptr_union.decode : Checksum doesn't match with cookie 0x{:x} : 0x{:x} != 0x{:x}".format(__name__, cookie, bitmap.number(t)&0xf, self.generate_checksum(cs)))
res = object.copy().set(ptr)
return super(ptr_union,self).decode(res, **kwds)
def decodeInteger(string, signed=False):
'''given a string encoded in the native byte-order, will produce an integer'''
res = bitmap.new(0, 0)
for ch in string:
res = bitmap.insert(res, (ord(ch), 8))
res, _ = res
if not signed:
return res
bitflag = (0x100**len(string)) // 2
signbit, value = res & bitflag, res & (bitflag - 1)
if res & signbit:
return value - bitflag
return value
def str(self):
data = bytearray(self.serialize())
if len(data) > 0:
res = [data[0] // 40, data.pop(0) % 40]
data = iter(data)
for n in data:
val = bitmap.new(0,0)
while n & 0x80:
val = bitmap.push(val, (n & 0x7f, 7))
n = next(data)
val = bitmap.push(val, (n, 7))
res.append(bitmap.int(val))
return '.'.join(map("{:d}".format, res))
return '0'
def decodeInteger(string, signed=False):
'''given a string encoded in the native byte-order, will produce an integer'''
res = bitmap.new(0,0)
for ch in string:
res = bitmap.insert(res, (ord(ch),8))
res,_ = res
if not signed:
return res
bitflag = (0x100**len(string)) / 2
signbit,value = res & bitflag, res & (bitflag - 1)
if res & signbit:
return value - bitflag
return value
def test_tag():
res = bitmap.new(0x1e, 5)
res = bitmap.zero
res = bitmap.push(res, (0x1f, 5))
res = bitmap.push(res, (0x1, 1))
res = bitmap.push(res, (0x10, 7))
res = bitmap.push(res, (0x1, 0))
res = bitmap.push(res, (0x0, 7))
x = pbinary.new(ber.Tag, source=ptypes.prov.string(bitmap.data(res)))
print x.l
print x['TagLong'][0]
print x.int()
print int(x['TagLong'])
def decode(self, object, **kwds):
szone, pu = self.getparent(szone_t), object.get()
cookie = szone['cookie'].li.int()
t = bitmap.new(pu, object.size() * 8)
t = bitmap.rol(t, 4)
ptr = bitmap.number(t) & ~0xf
cs = ptr ^ cookie
if bitmap.number(t) & 0xf != self.generate_checksum(cs):
logging.warn(
"{:s}.ptr_union.decode : Checksum doesn't match with cookie 0x{:x} : 0x{:x} != 0x{:x}"
.format(__name__, cookie,
bitmap.number(t) & 0xf, self.generate_checksum(cs)))
res = object.copy().set(ptr)
return super(ptr_union, self).decode(res, **kwds)
def summary(self):
iterable = (item.int() for item in self)
res = functools.reduce(lambda agg, item: agg * 0x100000000 + item, iterable, 0)
num = bitmap.new(res, 128)
components = bitmap.split(num, 16)
# FIXME: there's got to be a more elegant way than a hacky state machine
result, counter = [], 0
for item in map(bitmap.number, components):
if counter < 2:
if item == 0:
counter = 1
if len(result) == 0:
result.append('')
continue
elif counter > 0:
result.extend(['', "{:x}".format(item)])
counter = 2
continue
result.append("{:x}".format(item))
return ':'.join(result)
def set(self, string):
res = map(int, string.split('.'))
val = [res.pop(0) * 40 + res.pop(0)]
for n in res:
if n <= 127:
val.append(n)
continue
# convert integer to a bitmap
x = bitmap.new(0, 0)
while n > 0:
x = bitmap.insert(x, (n & 0xf, 4))
n /= 0x10
# shuffle bitmap into oid components
y = []
while bitmap.size(x) > 0:
x, v = bitmap.consume(x, 7)
y.insert(0, v)
val.extend([x | 0x80 for x in y[:-1]] + [y[-1]])
return super(OBJECT_IDENTIFIER).set(''.join(map(chr, val)))
def get_checksum(self):
'''Returns the encoded checksum for the ptr_union'''
pu = self.int()
t = bitmap.new(pu, self.size() * 8)
t = bitmap.rol(t, 4)
return bitmap.number(t) & 0xf
def data_padding():
res = bitmap.new(0x123, 12)
data = bitmap.data(res, reversed=0)
if data.encode('hex') == '1230':
raise Success
def data_padding_reversed():
res = bitmap.new(0x123, 12)
data = bitmap.data(res, reversed=1)
if data.encode('hex') == '3012':
raise Success
x = x & mask
x *= -1
else:
x &= mask
result.append(x)
return special, tuple(result)
def decode(string, *args, **kwds):
return consume(iter(string), *args, **kwds)
if True:
a = bitmap.new(0x0b058547, 32)
b = bitmap.data(a)
print bitmap.string(a)
j, (instr_index, ) = decode(b)
print hex(instr_index << 2)
#RAM:8C161580 0B 05 85 47 j loc_9FC7A134 # [note] simulator branches to 8c16151c
#AC 82 00 00
#ROM:9FC7A138 14 40 FF D0 bnez $v0, loc_9FC7A07C
#RAM:8C161560 14 40 FF D0 bnez $v0, loc_9FC7A0BC # 8c1614a4 #8c161564
if True:
a = bitmap.new(0x1440ffd0, 32)
b = bitmap.data(a)
def get_checksum(self):
'''Returns the encoded checksum for the ptr_union'''
pu = self.int()
t = bitmap.new(pu, self.size()*8)
t = bitmap.rol(t, 4)
return bitmap.number(t) & 0xf
def get_pointer(self):
'''Returns the encoded pointer'''
res = bitmap.new(self.int(), self.size() * 8)
res = bitmap.rol(res, 4)
res = bitmap.number(res) & ~0xf
return res
if b < 0:
if x & sf:
x = x & mask
x *= -1
else:
x &= mask
result.append(x)
return special,tuple(result)
def decode(string, *args, **kwds):
return consume( iter(string), *args, **kwds )
if True:
a = bitmap.new(0x0b058547, 32)
b = bitmap.data(a)
print bitmap.string(a)
j,(instr_index,) = decode(b)
print hex(instr_index<<2)
#RAM:8C161580 0B 05 85 47 j loc_9FC7A134 # [note] simulator branches to 8c16151c
#AC 82 00 00
#ROM:9FC7A138 14 40 FF D0 bnez $v0, loc_9FC7A07C
#RAM:8C161560 14 40 FF D0 bnez $v0, loc_9FC7A0BC # 8c1614a4 #8c161564
if True:
a = bitmap.new(0x1440ffd0, 32)
b = bitmap.data(a)
def data_padding_reversed():
res = bitmap.new(0x123, 12)
data = bitmap.data(res, reversed=1)
if tohex(data) == '3012':
raise Success
def bitmap(self):
res = bitmap.zero
for index, msize, busy in self['metadata'].busyfree():
val = bitmap.new((2**msize - 1) if busy else 0, msize)
res = bitmap.insert(res, val)
return res
def bitmap_ror2_value():
res = bitmap.new(0b0110, 4)
if bitmap.int(bitmap.ror(res, 2)) == 0b1001:
raise Success
def bitmap(self):
return bitmap.new(self.int(), self.size()*8)
def bitmap(self):
res = bitmap.zero
for index, msize, busy in self['metadata'].busyfree():
val = bitmap.new((2**msize - 1) if busy else 0, msize)
res = bitmap.insert(res, val)
return res
def get_pointer(self):
'''Returns the encoded pointer'''
res = bitmap.new(self.int(), self.size()*8)
res = bitmap.rol(res, 4)
res = bitmap.number(res) & ~0xf
return res
def summary(self):
num = bitmap.new(super(in_addr,self).int(), 32)
octets = bitmap.split(num, 8)[::-1]
return '0x{:x} {:d}.{:d}.{:d}.{:d}'.format(*map(bitmap.number,[num]+octets))
def bitmap_rorX_size():
res = bitmap.new(0b0110, 4)
if bitmap.size(bitmap.ror(res, 8)) == 4:
raise Success
def data_padding():
res = bitmap.new(0x123, 12)
data = bitmap.data(res, reversed=0)
if tohex(data) == '1230':
raise Success
def bitmap(self):
iterable = (bitmap.new(six.byte2int(item), 8)
for item in self.serialize())
return six.moves.reduce(bitmap.push, map(bitmap.reverse, iterable),
bitmap.zero)
def bitmap_rol4_size():
res = bitmap.new(0b0110, 4)
if bitmap.size(bitmap.rol(res, 4)) == 4:
raise Success
def bitmap(self):
return bitmap.new(self.int(), self.size() * 8)
def bitmap_rol1_value():
res = bitmap.new(0b0110, 4)
if bitmap.int(bitmap.rol(res, 1)) == 0b1100:
raise Success
def bitmap(self):
iterable = (bitmap.new(item.int(), 8 * item.size()) for item in self)
return six.moves.reduce(bitmap.push, map(bitmap.reverse, iterable),
bitmap.zero)
def bitmap_ror4_value():
res = bitmap.new(0b0110, 4)
if bitmap.int(bitmap.ror(res, 4)) == 0b0110:
raise Success
def data_padding():
res = bitmap.new(0x123, 12)
data = bitmap.data(res, reversed=0)
if data.encode('hex') == '1230':
raise Success
def generate_checksum(self, ptr):
pu = bitmap.new(ptr, self.size()*8)
res = reduce(bitmap.add, map(bitmap.number,bitmap.split(pu,8)), bitmap.new(0,8))
return bitmap.number(res) & 0xf
def data_padding_reversed():
res = bitmap.new(0x123, 12)
data = bitmap.data(res, reversed=1)
if data.encode('hex') == '3012':
raise Success
