116 lines
3.3 KiB
Python
116 lines
3.3 KiB
Python
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#!/usr/bin/env python
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import argparse
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import subprocess
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import os
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# This list contains symbols that _might_ be exported for some platforms
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PLATFORM_SYMBOLS = [
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'__bss_end__',
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'__bss_start__',
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'__bss_start',
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'__end__',
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'_bss_end__',
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'_edata',
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'_end',
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'_fini',
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'_init',
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]
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def get_symbols(nm, lib):
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'''
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List all the (non platform-specific) symbols exported by the library
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'''
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symbols = []
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output = subprocess.check_output([nm, '--format=bsd', '-D', '--defined-only', lib],
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stderr=open(os.devnull, 'w')).decode("ascii")
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for line in output.splitlines():
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(_, _, symbol_name) = line.split()
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symbols.append(symbol_name)
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return symbols
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def main():
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parser = argparse.ArgumentParser()
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parser.add_argument('--symbols-file',
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action='store',
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required=True,
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help='path to file containing symbols')
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parser.add_argument('--lib',
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action='store',
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required=True,
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help='path to library')
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parser.add_argument('--nm',
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action='store',
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required=True,
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help='path to binary (or name in $PATH)')
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args = parser.parse_args()
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lib_symbols = get_symbols(args.nm, args.lib)
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mandatory_symbols = []
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optional_symbols = []
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with open(args.symbols_file) as symbols_file:
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qualifier_optional = '(optional)'
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for line in symbols_file.readlines():
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# Strip comments
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line = line.split('#')[0]
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line = line.strip()
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if not line:
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continue
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# Line format:
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# [qualifier] symbol
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qualifier = None
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symbol = None
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fields = line.split()
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if len(fields) == 1:
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symbol = fields[0]
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elif len(fields) == 2:
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qualifier = fields[0]
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symbol = fields[1]
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else:
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print(args.symbols_file + ': invalid format: ' + line)
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exit(1)
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# The only supported qualifier is 'optional', which means the
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# symbol doesn't have to be exported by the library
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if qualifier and not qualifier == qualifier_optional:
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print(args.symbols_file + ': invalid qualifier: ' + qualifier)
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exit(1)
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if qualifier == qualifier_optional:
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optional_symbols.append(symbol)
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else:
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mandatory_symbols.append(symbol)
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unknown_symbols = []
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for symbol in lib_symbols:
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if symbol in mandatory_symbols:
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continue
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if symbol in optional_symbols:
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continue
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if symbol in PLATFORM_SYMBOLS:
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continue
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unknown_symbols.append(symbol)
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missing_symbols = [
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sym for sym in mandatory_symbols if sym not in lib_symbols
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]
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for symbol in unknown_symbols:
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print(args.lib + ': unknown symbol exported: ' + symbol)
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for symbol in missing_symbols:
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print(args.lib + ': missing symbol: ' + symbol)
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if unknown_symbols or missing_symbols:
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exit(1)
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exit(0)
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if __name__ == '__main__':
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main()
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