objcopy.py

#!/usr/bin/env python3
#
# Copyright 2013 The Flutter 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 argparse
import os
import subprocess
import sys

# BFD architecture names recognized by objcopy.
BFD_ARCH = {
    'arm': 'arm',
    'arm64': 'aarch64',
    'x86': 'i386',
    'x64': 'i386:x86-64',
}

# BFD target names recognized by objcopy.
BFD_TARGET = {
    'arm': 'elf32-littlearm',
    'arm64': 'elf64-littleaarch64',
    'x86': 'elf32-i386',
    'x64': 'elf64-x86-64',
}


def main():
  parser = argparse.ArgumentParser(
      description='Convert a data file to an object file'
  )
  parser.add_argument('--objcopy', type=str, required=True)
  parser.add_argument('--input', type=str, required=True)
  parser.add_argument('--output', type=str, required=True)
  parser.add_argument('--arch', type=str, required=True)

  args = parser.parse_args()

  input_dir, input_file = os.path.split(args.input)
  output_path = os.path.abspath(args.output)

  subprocess.check_call([
      args.objcopy,
      '-I',
      'binary',
      '-O',
      BFD_TARGET[args.arch],
      '-B',
      BFD_ARCH[args.arch],
      input_file,
      output_path,
  ],
                        cwd=input_dir)


if __name__ == '__main__':
  sys.exit(main())