| # Copyright (c) 2011 The Chromium OS Authors. All rights reserved. |
| # Use of this source code is governed by a BSD-style license that can be |
| # found in the LICENSE file. |
| |
| import logging |
| |
| from autotest_lib.server.cros.faft.firmware_test import FirmwareTest |
| from autotest_lib.server.cros.faft.firmware_test import ConnectionError |
| |
| |
| class firmware_CorruptFwSigB(FirmwareTest): |
| """ |
| Servo based firmware signature B corruption test. |
| """ |
| version = 1 |
| |
| def initialize(self, host, cmdline_args, dev_mode=False): |
| super(firmware_CorruptFwSigB, self).initialize(host, cmdline_args) |
| self.backup_firmware() |
| self.switcher.setup_mode('dev' if dev_mode else 'normal', |
| allow_gbb_force=True) |
| self.setup_usbkey(usbkey=False) |
| |
| def cleanup(self): |
| try: |
| if self.is_firmware_saved(): |
| self.restore_firmware() |
| except ConnectionError: |
| logging.error("ERROR: DUT did not come up. Need to cleanup!") |
| super(firmware_CorruptFwSigB, self).cleanup() |
| |
| def run_once(self): |
| """Runs a single iteration of the test.""" |
| logging.info("Expected firmware A boot and corrupt " |
| "firmware signature B.") |
| self.check_state((self.checkers.fw_tries_checker, 'A')) |
| offset_b, byte_b = self.faft_client.bios.get_sig_one_byte('b') |
| self.faft_client.bios.modify_sig('b', offset_b, byte_b + 1) |
| self.switcher.mode_aware_reboot() |
| |
| logging.info("Expected firmware A boot and set try_fwb flag.") |
| self.check_state((self.checkers.fw_tries_checker, 'A')) |
| self.try_fwb() |
| self.switcher.mode_aware_reboot() |
| |
| logging.info("Expected firmware A boot and restore firmware B.") |
| self.check_state((self.checkers.fw_tries_checker, ('A', False))) |
| self.faft_client.bios.modify_sig('b', offset_b, byte_b) |
| self.switcher.mode_aware_reboot() |
| |
| logging.info("Final check and done.") |
| self.check_state((self.checkers.fw_tries_checker, 'A')) |
