[PATCH] D61824: [ARM][AArch64] Overalign SHF_TLS instead of PT_TLS (Android Bionic hack) to make glibc happy

[Peter Smith via Phabricator via llvm-commits]

peter.smith added a comment.

>> Aside: An `R_{ARM,AARCH64}_NONE` relocation to a TLS symbol has the desired effect. Is there a better way to create this relocation than by using a hex editor?
> 
> why not export the symbol?
>  then it cannot be removed for sure.
>  (i think gas has a .reloc directive that accepts R_AARCH64_NONE as argument, not sure if llvm handles that)

llvm has some support for the .reloc directive but IIRC it requires each target (ARM, AArch64, ...) each target AsmBackend is required to map the relocation name to a supported MCFixupKind by I think getFixupKind(RelocName). Unfortunately neither ARM, AArch64 or many other backends override the default, which doesn't recognise anything. I think this would be a fairly straightforward thing to implement.


Repository:
  rLLD LLVM Linker

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https://reviews.llvm.org/D61824