llvm dev - Nov 2019 - ELF string table access in backend

Hello,

While developing a backend for the custom target I need to create a custom
ELF section and put there some mapping of other ELF sections to strings.

For this I have two questions:

- How can I get a section index in the section table from within target ELF
streamer? Is it possible? 

- How can I get access to the string table section, put some string and get
back its offset in string table?

If it is not possible maybe there is a way to somehow post-process ELF for
this before actually writing to file?

 

Best regards,

Dmitri Botcharnikov

 

 

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When you say "the string table" - are you referring to a particular
section? There can be multiple/any section that contains strings that can
be deduplicated by the linker (see debug_str for example) - and you can
create your own sections that have that kind of functionality if you like
(again, debug_str might be a goode xample to look at)

On Tue, Nov 26, 2019 at 9:17 AM Dmitri Botcharnikov via llvm-dev <
llvm-dev at lists.llvm.org> wrote:
> Hello,
>
> While developing a backend for the custom target I need to create a custom
> ELF section and put there some mapping of other ELF sections to strings.
>
> For this I have two questions:
>
> - How can I get a section index in the section table from within target
> ELF streamer? Is it possible?
>
> - How can I get access to the string table section, put some string and
> get back its offset in string table?
>
> If it is not possible maybe there is a way to somehow post-process ELF for
> this before actually writing to file?
>
>
>
> Best regards,
>
> Dmitri Botcharnikov
>
>
>
>
>
>
>
>
> _______________________________________________
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
> https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>
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