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dmesg.py
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/
dmesg.py
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# Volatility
# Copyright (C) 2007-2013 Volatility Foundation
#
# This file is part of Volatility.
#
# Volatility is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# Volatility is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Volatility. If not, see <http://www.gnu.org/licenses/>.
#
"""
@author: Andrew Case
@license: GNU General Public License 2.0
@contact: atcuno@gmail.com
@organization:
"""
import volatility.obj as obj
import volatility.plugins.mac.common as common
class mac_dmesg(common.AbstractMacCommand):
""" Prints the kernel debug buffer """
def calculate(self):
common.set_plugin_members(self)
msgbuf_ptr = obj.Object("Pointer", offset = self.addr_space.profile.get_symbol("_msgbufp"), vm = self.addr_space)
msgbufp = msgbuf_ptr.dereference_as("msgbuf")
bufx = msgbufp.msg_bufx
size = msgbufp.msg_size
bufc = self.addr_space.read(msgbufp.msg_bufc, size)
if bufc[bufx] == 0 and bufc[0] != 0:
## FIXME: can we do this without get_string?
buf = common.get_string(bufc, self.addr_space)
else:
if bufx > size:
bufx = 0
# older messages
buf = bufc[bufx:bufx + size]
buf = buf + bufc[0:bufx]
# strip leading NULLs
while ord(buf[0]) == 0x00:
buf = buf[1:]
yield buf
def render_text(self, outfd, data):
for buf in data:
outfd.write("{0}\n".format(buf))