mirror of
https://github.com/RGBCube/serenity
synced 2025-10-31 19:22:45 +00:00
60 lines
2 KiB
Python
60 lines
2 KiB
Python
#!/usr/bin/env python3
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import argparse
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import shutil
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import subprocess
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import sys
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from functools import cmp_to_key
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from pathlib import Path
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def main():
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parser = argparse.ArgumentParser(
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epilog=__doc__,
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formatter_class=argparse.RawDescriptionHelpFormatter)
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parser.add_argument('kernel', help='kernel binary location')
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parser.add_argument('-n', '--nm', required=True, help='path to nm')
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parser.add_argument('-o', '--objcopy', required=True, help='path to objcopy')
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args = parser.parse_args()
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kernel_path = Path(args.kernel)
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binary_directory = kernel_path.parent
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# Write out kernel.map, which contains kernel symbols and their addresses
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symbols = subprocess.check_output([args.nm, '-C', '-n', str(kernel_path)])
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if not symbols:
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print(f"Unable to dump symbols from {kernel_path}", file=sys.stderr)
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return 1
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def filter_symbol(s):
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return s and not (".Lubsan_data" in s or s.split()[1] == "a")
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symbols = filter(filter_symbol, symbols.decode().split('\n'))
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symbols = list(set(symbols))
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def sort_symbols(s1, s2):
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return int(s1.split()[0], base=16) - int(s2.split()[0], base=16)
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symbols = sorted(symbols, key=cmp_to_key(sort_symbols))
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kernel_map = binary_directory / "kernel.map"
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with open(kernel_map, 'w') as out:
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out.write(f'{len(symbols):#x}\n')
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out.write('\n'.join(symbols))
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out.write('\0')
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kernel_final = binary_directory / "Kernel"
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shutil.copyfile(kernel_path, kernel_final)
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kernel_final = str(kernel_final)
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subprocess.check_call([args.objcopy, "--update-section", f".ksyms={kernel_map}", kernel_final])
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subprocess.check_call([args.objcopy, "--only-keep-debug", kernel_final, kernel_final + ".debug"])
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subprocess.check_call([args.objcopy, "--strip-debug", kernel_final])
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subprocess.check_call([args.objcopy, f"--add-gnu-debuglink={kernel_final}.debug", kernel_final])
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return 0
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if __name__ == "__main__":
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sys.exit(main())
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