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34 lines
1 KiB
Python
Executable file
34 lines
1 KiB
Python
Executable file
#!/usr/bin/env python3
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import struct, sys, argparse
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import elftools.elf.elffile
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# Patches driverominit.o to change bnez t6,3c to nop at offset 0x20 in the .text section
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if __name__ == "__main__":
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parser = argparse.ArgumentParser()
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parser.add_argument("file", help="input file")
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args = parser.parse_args()
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with open(args.file, "r+b") as f:
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elf = elftools.elf.elffile.ELFFile(f)
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text_offset = 0
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for section in elf.iter_sections():
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if section.name == ".text":
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text_offset = section["sh_offset"]
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break
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if text_offset == 0:
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print("Error: .text section not found")
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sys.exit(1)
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f.seek(text_offset + 0x20)
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instruction = struct.unpack(">I", f.read(4))[0]
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if instruction != 0x15C00006: # bnez t6,3c
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print("Error: expected instruction not found, found 0x%08X" % instruction)
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sys.exit(1)
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f.seek(text_offset + 0x20)
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f.write(struct.pack(">I", 0x00000000)) # nop
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