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linuxdisassemblyobjdump

Disassemble a file and get the bytes from the text section

I am trying to disassemble a file on Ubuntu and extract only the text section. To do this I am using objdump -d executable_file > dump. This gives me nice human-readable output.

However, I am looking for the binary bytes (which are displayed in the second column of the output):

MEM_ADDRESS <.text>:
 MEM_ADDRESS:   XX XX                   HUMAN_READABLE_DISASM
 MEM_ADDRESS:   XX XX XX XX             HUMAN_READABLE_DISASM

What I want to extract is the XX as a single stream of bytes, just as in the original binary.

Is it possible to do this without parsing the output file?

Solution

  • Yes. You can use the objcopy utility to extract a section, e.g.

    objcopy --output-target=binary --only-section=.text input.elf output.bin