mirror of https://github.com/ARMmbed/mbed-os.git
96 lines
3.1 KiB
Python
Executable File
96 lines
3.1 KiB
Python
Executable File
#! /usr/bin/env python3
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#
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# Copyright 2017 Linaro Limited
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# Copyright (c) 2017-2019, Arm Limited.
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#
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# SPDX-License-Identifier: Apache-2.0
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""
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Assemble multiple images into a single image that can be flashed on the device.
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"""
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import argparse
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import errno
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import io
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import re
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import os
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import shutil
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import macro_parser
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offset_re = re.compile(r"^\s*RE_([0-9A-Z_]+)_IMAGE_OFFSET\s*=\s*(.*)")
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size_re = re.compile(r"^\s*RE_([0-9A-Z_]+)_IMAGE_MAX_SIZE\s*=\s*(.*)")
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class Assembly():
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def __init__(self, layout_path, output):
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self.output = output
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self.layout_path = layout_path
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self.find_slots()
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try:
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os.unlink(output)
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except OSError as e:
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if e.errno != errno.ENOENT:
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raise
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def find_slots(self):
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offsets = {}
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sizes = {}
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offsets = macro_parser.evaluate_macro(self.layout_path, offset_re, 1, 2)
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sizes = macro_parser.evaluate_macro(self.layout_path, size_re, 1, 2)
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if 'SECURE' not in offsets:
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raise Exception("Image config does not have secure partition")
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if 'NON_SECURE' not in offsets:
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raise Exception("Image config does not have non-secure partition")
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self.offsets = offsets
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self.sizes = sizes
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def add_image(self, source, partition):
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with open(self.output, 'ab') as ofd:
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ofd.seek(0, os.SEEK_END)
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pos = ofd.tell()
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if pos > self.offsets[partition]:
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raise Exception("Partitions not in order, unsupported")
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if pos < self.offsets[partition]:
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ofd.write(b'\xFF' * (self.offsets[partition] - pos))
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statinfo = os.stat(source)
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if statinfo.st_size > self.sizes[partition]:
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raise Exception("Image {} is too large for partition".format(source))
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with open(source, 'rb') as rfd:
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shutil.copyfileobj(rfd, ofd, 0x10000)
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def main():
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parser = argparse.ArgumentParser()
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parser.add_argument('-l', '--layout', required=True,
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help='Location of the file that contains preprocessed macros')
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parser.add_argument('-s', '--secure', required=True,
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help='Unsigned secure image')
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parser.add_argument('-n', '--non_secure',
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help='Unsigned non-secure image')
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parser.add_argument('-o', '--output', required=True,
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help='Filename to write full image to')
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args = parser.parse_args()
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output = Assembly(args.layout, args.output)
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output.add_image(args.secure, "SECURE")
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output.add_image(args.non_secure, "NON_SECURE")
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if __name__ == '__main__':
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main()
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