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44 lines
1.4 KiB
Python
44 lines
1.4 KiB
Python
#!/opt/homebrew/bin/python3.10
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# Copyright 2023 by moshix
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#
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#
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# hexdump.py a hex disassembler in ython
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#
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#
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# Usage: hexdump.py objectfile
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# dumps hex in groups of 16 bytes
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#
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#
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#
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#
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#
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# v0.1 Humble beginnings
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# v0.2 open file and read into byte array data
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# v0.3 extract program name from MVS object file at position 8..16
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# v0.4 loop thru object starting from position 359 and print out hex program
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# v0.5
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import sys
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def hexdump(filename):
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with open(filename, 'rb') as f:
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counter = 0
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mem_f= "{:04d}".format(counter)
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print("Dec Hex Content hex Content asci")
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print("---- --------- ----------------------------------------------- ------------")
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while True:
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chunk = f.read(16)
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if not chunk:
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break
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mem_f= "{:04d}".format(counter)
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hexdata = ' '.join(f'{byte:02X}' for byte in chunk)
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textdata = ''.join(chr(byte) if 32 <= byte <= 126 else '.' for byte in chunk)
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print(str(mem_f) +" " + f'{counter:08X} {hexdata:<48} {textdata}')
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counter += 16
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if __name__ == '__main__':
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if len(sys.argv) != 2:
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print(f'Usage: {sys.argv[0]} <filename>')
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sys.exit(1)
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hexdump(sys.argv[1])
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