| #!/usr/bin/env python | |
| # Script to remove EXEC flag from an ELF file | |
| # | |
| # Copyright (C) 2020 Kevin O'Connor <kevin@koconnor.net> | |
| # | |
| # This file may be distributed under the terms of the GNU GPLv3 license. | |
| import optparse | |
| FLAG_OFFSET = 16 | |
| def main(): | |
| # Parse command-line arguments | |
| usage = "%prog <input_file> <output_file>" | |
| opts = optparse.OptionParser(usage) | |
| options, args = opts.parse_args() | |
| if len(args) != 2: | |
| opts.error("Incorrect number of arguments") | |
| infilename, outfilename = args | |
| # Read input | |
| f = open(infilename, "rb") | |
| srcdata = f.read() | |
| f.close() | |
| # Update | |
| outdata = bytearray(srcdata) | |
| outdata[FLAG_OFFSET] = 0x01 # change ET_EXEC to ET_REL | |
| # Write output | |
| f = open(outfilename, "wb") | |
| f.write(outdata) | |
| f.close() | |
| if __name__ == '__main__': | |
| main() |