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# Legilimency - Memory Analysis Framework for iOS
# --------------------------------------
#
# Written and maintained by Gal Beniamini <laginimaineb@google.com>
#
# Copyright 2017 Google Inc. All Rights Reserved.
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from MemClient import MemClient
from defs import *
from symbols import *
from kalloc import *
#The offset of the base address field in the AppleBCMWLANPCIeSubmissionRing instance
BASE_ADDRESS_OFFSET = 248
#The offset of the element size field in the AppleBCMWLANPCIeSubmissionRing instance
ELEMENT_SIZE_OFFSET = 92
#The offset of the index pointer field in the AppleBCMWLANPCIeSubmissionRing instance
INDEX_POINTER_OFFSET = 184
#The offset of the read index pointer field in the AppleBCMWLANPCIeSubmissionRing instance
R_INDEX_POINTER_OFFSET = 176
#The offset of the max index field in the AppleBCMWLANPCIeSubmissionRing instance
MAX_INDEX_OFFSET = 88
class AppleBCMWLANPCIeSubmissionRing(object):
"""
This class is used to represent an AppleBCMWLANPCIeSubmissionRing instance
"""
def __init__(self, client, addr, ring_id):
"""
Creates a new client, using the underlying MemShell client and the given instance address
"""
self.client = client
self.addr = addr
self.ring_id = ring_id
def get_base_address(self):
"""
Returns the ring's base address in the kernel VAS
"""
return self.client.read64(self.addr + BASE_ADDRESS_OFFSET)
def get_element_size(self):
"""
Returns the ring's element size
"""
return self.client.read32(self.addr + ELEMENT_SIZE_OFFSET)
def get_index_pointer(self):
"""
Returns the pointer to the ring's index in the kernel VAS (which is also mapped to IO-Space!)
"""
return self.client.read64(self.addr + INDEX_POINTER_OFFSET)
def get_r_index_pointer(self):
"""
Returns the pointer to the ring's read-index in the kernel VAS (which is also mapped to IO-Space!)
"""
return self.client.read64(self.addr + R_INDEX_POINTER_OFFSET)
def get_max_index(self):
"""
Returns the ring's maximal allowed index
"""
return self.client.read32(self.addr + MAX_INDEX_OFFSET)
def get_ring_id(self):
"""
Returns the ring's ID
"""
return self.ring_id