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Re: [PATCH] aarch64: simplify the DT_AARCH64_VARIANT_PCS handling code
* Szabolcs Nagy:
> On 09/07/2019 13:55, Szabolcs Nagy wrote:
>> Remove unnecessary variant_pcs field: the dynamic tag can be checked
>> directly.
>>
>> I'll commit this tomorrow unless there are comments.
>> Then backport it with the variant pcs support to release branches
>> https://sourceware.org/ml/libc-alpha/2019-05/msg00523.html
>
> i was about to back port this but i wonder if
> glibc has policy that a release branch cannot
> change libc internal abi between dynamic linker
> and lib*.so to allow reliable updates?
>
> this patch changes the size of map->l_info array.
The usual issue involves changing the size of _rtld_global and
_rtld_global_ro.
I don't know to what extent libc and libdl access link maps directly,
without going through ld.so. I don't recall seeing anything like
that, but that doesn't mean much.