add support for modifying and writing back to file

[ghost]

It would be great to be able to modify certain segments and sections and be able to write dump out the same to a file.

[eliben]

This is currently a non-goal for pyelftools, sorry.

[mefistotelis]

I made a support for adding/modifying ELF sections and writing back the changes; they're on my fork and I use it in my tools (ie. a tool which converts BIN firmware file for ARM-based embedded devices back to ELF).

But my approach/interface may be sub-optimal - I implemented things as I needed them, without a master design.

Maybe, even if merging elf write support is not within foreseeable plans, we need a discussion on how such write interface should look like?

Fork with write support:
https://github.com/mefistotelis/pyelftools
Example use:
https://github.com/o-gs/dji-firmware-tools/blob/master/arm_bin2elf.py

[eliben]

It's fine to keep it on your fork. I still don't plan to add this feature to pyelftools - I just don't have the time to add features currently