mirror of
https://github.com/chipsec/chipsec
synced 2026-06-08 13:31:00 +00:00
BrentHoltsclaw
122 lines
4.3 KiB
Python
122 lines
4.3 KiB
Python
#!/usr/bin/python
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#CHIPSEC: Platform Security Assessment Framework
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#Copyright (c) 2010-2017, Intel Corporation
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#
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#This program is free software; you can redistribute it and/or
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#modify it under the terms of the GNU General Public License
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#as published by the Free Software Foundation; Version 2.
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#
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#This program 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 this program; if not, write to the Free Software
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#Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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#
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#Contact information:
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#chipsec@intel.com
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#
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"""
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The igd command allows memory read/write operations using igd dma.
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"""
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import time
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import chipsec_util
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from chipsec.hal import igd
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from chipsec.command import BaseCommand
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from chipsec.logger import *
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import chipsec.file
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# Port I/O
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class IgdCommand(BaseCommand):
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"""
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>>> chipsec_util igd
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>>> chipsec_util igd dmaread <address> [width] [file_name]
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>>> chipsec_util igd dmawrite <address> <width> <value|file_name>
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Examples:
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>>> chipsec_util igd dmaread 0x20000000 4
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>>> chipsec_util igd dmawrite 0x2217F1000 0x4 deadbeef
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"""
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def requires_driver(self):
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# No driver required when printing the util documentation
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if len(self.argv) < 3:
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return False
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return True
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def run(self):
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size = 0x100
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if len(self.argv) < 3:
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print (IgdCommand.__doc__)
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return
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if not self.cs.igd.is_device_enabled():
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self.logger.log( '[CHIPSEC] Looks like internal graphics device is not enabled' )
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return
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op = self.argv[2]
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t = time.time()
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if 'dmaread' == op:
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phys_address = int(self.argv[3],16)
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size = int(self.argv[4],16) if len(self.argv) > 4 else 0x100
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self.logger.log( '[CHIPSEC] reading buffer from memory: PA = 0x{:016X}, len = 0x{:X}..'.format(phys_address, size) )
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buffer = self.cs.igd.gfx_aperture_dma_read_write( phys_address, size )
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if len(self.argv) > 5:
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buf_file = self.argv[5]
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chipsec.file.write_file( buf_file, buffer )
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self.logger.log( "[CHIPSEC] written 0x{:X} bytes to '{}'".format(len(buffer), buf_file) )
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else:
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print_buffer( buffer )
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elif 'dmawrite' == op:
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phys_address = int(self.argv[3],16)
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if len(self.argv) > 4:
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size = int(self.argv[4],16)
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else:
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self.logger.error( "must specify <length> argument in 'igddma write'" )
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return
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if len(self.argv) > 5:
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buf_file = self.argv[5]
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if not os.path.exists( buf_file ):
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try:
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buffer = bytearray.fromhex(buf_file)
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except ValueError as e:
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self.logger.error( "incorrect <value> specified: '{}'".format(buf_file) )
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self.logger.error( str(e) )
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return
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self.logger.log( "[CHIPSEC] read 0x{:X} hex bytes from command-line: {}'".format(len(buffer), buf_file) )
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else:
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buffer = chipsec.file.read_file( buf_file )
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self.logger.log( "[CHIPSEC] read 0x{:X} bytes from file '{}'".format(len(buffer), buf_file) )
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if len(buffer) < size:
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self.logger.error( "number of bytes read (0x{:X}) is less than the specified <length> (0x{:X})".format(len(buffer),size) )
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return
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self.logger.log( '[CHIPSEC] writing buffer to memory: PA = 0x{:016X}, len = 0x{:X}..'.format(phys_address, size) )
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self.cs.igd.gfx_aperture_dma_read_write( phys_address, size, buffer )
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else:
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self.logger.error( "must specify <buffer>|<file> argument in 'igddma write'" )
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return
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else:
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print (IgdCommand.__doc__)
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return
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self.logger.log( "[CHIPSEC] (mem) time elapsed {:.3f}".format(time.time()-t) )
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commands = { 'igd': IgdCommand }
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