mirror of
https://github.com/chipsec/chipsec
synced 2026-06-08 13:31:00 +00:00
BrentHoltsclaw
104 lines
3.2 KiB
Python
104 lines
3.2 KiB
Python
#!/usr/bin/python
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#CHIPSEC: Platform Security Assessment Framework
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#Copyright (c) 2010-2019, 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 io command allows direct access to read and write I/O port space.
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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 iobar
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from chipsec.command import BaseCommand
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# Port I/O
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class PortIOCommand(BaseCommand):
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"""
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>>> chipsec_util io list
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>>> chipsec_util io <io_port> <width> [value]
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Examples:
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>>> chipsec_util io list
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>>> chipsec_util io 0x61 1
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>>> chipsec_util io 0x430 byte 0x0
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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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if len(self.argv) < 3:
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print (PortIOCommand.__doc__)
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return
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try:
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_iobar = iobar.IOBAR( self.cs )
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except iobar.IOBARRuntimeError as msg:
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print (msg)
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return
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op = self.argv[2]
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if ( 'list' == op ):
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_iobar.list_IO_BARs()
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return
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t = time.time()
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if len(self.argv) < 3:
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print (PortIOCommand.__doc__)
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return
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io_port = int(self.argv[2],16)
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width = 0x1
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if len(self.argv) > 3:
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width = chipsec_util.get_option_width(self.argv[3]) if chipsec_util.is_option_valid_width(self.argv[3]) else int(self.argv[3],16)
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if 5 == len(self.argv):
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value = int(self.argv[4], 16)
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self.logger.log( "[CHIPSEC] OUT 0x{:04X} <- 0x{:08X} (size = 0x{:02X})".format(io_port, value, width) )
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if 0x1 == width: self.cs.io.write_port_byte( io_port, value )
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elif 0x2 == width: self.cs.io.write_port_word( io_port, value )
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elif 0x4 == width: self.cs.io.write_port_dword( io_port, value )
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else:
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self.logger.log( "Invalid write size requested. 1,2,4 supported")
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return
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else:
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if 0x1 == width: value = self.cs.io.read_port_byte( io_port )
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elif 0x2 == width: value = self.cs.io.read_port_word( io_port )
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elif 0x4 == width: value = self.cs.io.read_port_dword( io_port )
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else:
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self.logger.log( "Invalid read size requested. 1,2,4 supported")
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return
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self.logger.log( "[CHIPSEC] IN 0x{:04X} -> 0x{:08X} (size = 0x{:02X})".format(io_port, value, width) )
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self.logger.log( "[CHIPSEC] (io) time elapsed {:.3f}".format(time.time()-t) )
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commands = { 'io': PortIOCommand }
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