mirror of
https://github.com/volatilityfoundation/volatility
synced 2026-06-08 18:04:46 +00:00
Andrew C
91 lines
2.8 KiB
Python
91 lines
2.8 KiB
Python
# Volatility
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#
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# Authors:
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# Mike Auty
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#
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# This file is part of Volatility.
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#
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# Volatility is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# Volatility is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with Volatility. If not, see <http://www.gnu.org/licenses/>.
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#
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import struct
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import volatility.plugins.addrspaces.standard as standard
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import volatility.obj as obj
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import volatility.addrspace as addrspace
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class MachOAddressSpace(addrspace.AbstractRunBasedMemory):
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"""
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Address space for mach-o files to support atc-ny memory reader
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The created mach-o file has a bunch of segments that contain the address of the section and the size
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From there we can translate between incoming address requests to memory contents
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"""
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order = 1
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pae = True
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checkname = 'MachOValidAS'
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def __init__(self, base, config, *args, **kwargs):
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self.as_assert(base, "mac: need base")
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addrspace.AbstractRunBasedMemory.__init__(self, base, config, *args, **kwargs)
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sig = base.read(0, 4)
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if sig == '\xce\xfa\xed\xfe':
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self.bits = 32
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elif sig == '\xcf\xfa\xed\xfe':
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self.bits = 64
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else:
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self.as_assert(0, "MachO Header signature invalid")
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self.runs = []
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self.header = None
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self.addr_cache = {}
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self.parse_macho()
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def get_object_name(self, object):
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if self.bits == 64 and object in ["mach_header", "segment_command", "section"]:
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object = object + "_64"
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return object
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def get_available_addresses(self):
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for vmaddr, _, vmsize in self.runs:
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yield vmaddr, vmsize
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def get_header(self):
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return self.header
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def parse_macho(self):
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self.runs = []
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header_name = self.get_object_name("mach_header")
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header_size = self.profile.get_obj_size(header_name)
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self.header = obj.Object(header_name, 0, self.base)
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offset = header_size
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self.segs = []
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for i in xrange(0, self.header.ncmds):
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structname = self.get_object_name("segment_command")
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seg = obj.Object(structname, offset, self.base)
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self.segs.append(seg)
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# Since these values will be used a lot, make sure they aren't reread (ie, no objects in the runs list)
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run = (int(seg.vmaddr), int(seg.fileoff), int(seg.vmsize))
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self.runs.append(run)
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offset = offset + seg.cmdsize
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