Re: [Elftoolchain-developers] elf_update breaks elf executable

[Eric S. <sch...@gm...>]

Joseph Koshy <jk...@us...> writes:

>> I'm trying to modify the .text section of an existing elf executable,
>> however even the simplest elf_begin, elf_update, elf_end sequence
>> results in a non-functioning executable elf file.
>
> This is most likely a known bug [1]; the ELF_C_RDWR case has never
> worked properly.
>
> The (rather ugly) workaround is to create a new ELF object by copying
> over contents from the old one.
>

Thanks for the reply and the workaround.

I've since switched to using libbfd (part of gnu binutils [1]), which
although more mature doesn't as conveniently expose general purpose
functions for elf manipulation, and I finally found it easiest to
implemented this functionality myself in common lisp [2].

Thanks -- Eric

Footnotes: 
[1]  http://www.gnu.org/software/binutils/

[2]  http://cs.unm.edu/~eschulte/research/cl-elf/