[PATCH] elf: Support multiple PT_GNU_RELRO segments

[Florian Weimer]

* Adhemerval Zanella Netto:

> On 09/07/26 05:43, Florian Weimer wrote:
>> * Adhemerval Zanella Netto:
>> 
>>> One possibility is to create the tests (ET_EXEC/ET_DYN) with some extra dummy
>>> DT_NEEDED tags by linking with -Wl,--as-needed and some libraries, and then 
>>> post-processing it and replace it with PT_GNU_RELRO tags.
>> 
>> I don't see how this would work.  We can try to create extra PT_NOTE
>> segments (perhaps by varying alignment?), and turn those into
>> PT_GNU_RELRO via post-processing.
>
> The idea is just to create extra DT_* entries, the shared libraries are just
> placeholders.  But as H.J has noted, ld.bfd already supports --spare-dynamic-tags=
> (not sure which version, but we can add a configure script).

I'm not sure this reserves space in the right area of the ELF object.

Thanks,
Florian