[PATCH] D22563: [ARM][LLD] Initial support for local dynamic TLS for ARM Target

[Peter Smith via llvm-commits]

peter.smith created this revision.
peter.smith added reviewers: ruiu, rafael.
peter.smith added a subscriber: llvm-commits.
Herald added subscribers: rengolin, aemerson.

Add support for the local dynamic model ARM TLS relocations:
- R_ARM_TLS_LDM32
- R_ARM_TLS_LDO32
    
The local dynamic model was not in the inital ARM TLS patch as there was a dependency on llvm-mc (https://reviews.llvm.org/D22461) which has now been closed.

The local dynamic implementation and tests follows the same model as the other ARM TLS models. The R_ARM_TLS_LDO32 is implemented as R_ABS expr type as the getVA() for a TLS symbol will return the offset from the start of the TLS block.

References:
TLS model: http://infocenter.arm.com/help/topic/com.arm.doc.ihi0045e/IHI0045E_ABI_addenda.pdf
Relocations: http://infocenter.arm.com/help/topic/com.arm.doc.ihi0044f/IHI0044F_aaelf.pdf 



https://reviews.llvm.org/D22563

Files:
  ELF/Target.cpp
  test/ELF/arm-tls-ldm32.s

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