blob: 380fb1f7933b69d6f2c22bbf3f43e7509d0b8964 [file] [log] [blame]
# Copyright 2021 The Pigweed Authors
# Licensed under the Apache License, Version 2.0 (the "License"); you may not
# use this file except in compliance with the License. You may obtain a copy of
# the License at
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations under
# the License.
"""A simple tool to decode a CFSR register from the command line
Example usage:
$ python -m pw_cpu_exception_cortex_m.cfsr_decoder 0x00010100
20210412 15:09:01 INF Exception caused by a usage fault, bus fault.
Active Crash Fault Status Register (CFSR) fields:
IBUSERR Bus fault on instruction fetch.
UNDEFINSTR Encountered invalid instruction.
All registers:
cfsr 0x00010100
import argparse
import logging
import sys
import pw_cli.log
from pw_cpu_exception_cortex_m_protos import cpu_state_pb2
from pw_cpu_exception_cortex_m import exception_analyzer
_LOG = logging.getLogger('decode_cfsr')
def _parse_args() -> argparse.Namespace:
"""Parses arguments for this script, splitting out the command to run."""
parser = argparse.ArgumentParser(description=__doc__)
type=lambda val: int(val, 0),
help='The Cortex-M CFSR to decode')
return parser.parse_args()
def dump_cfsr(cfsr: int) -> int:
cpu_state_proto = cpu_state_pb2.ArmV7mCpuState()
cpu_state_proto.cfsr = cfsr
cpu_state_info = exception_analyzer.CortexMExceptionAnalyzer(
return 0
if __name__ == '__main__':