[PATCH] D86893: [PowerPC] Add support for TLS Initial Exec

[Stefan Pintilie via Phabricator via llvm-commits]

stefanp created this revision.
stefanp added reviewers: nemanjai, sfertile, MaskRay, NeHuang, hfinkel, PowerPC.
Herald added subscribers: shchenz, kbarton, arichardson, emaste.
Herald added a reviewer: espindola.
Herald added a project: LLVM.
stefanp requested review of this revision.

Add Thread Local Storage Initial Exec support to LLD.

      

This patch adds the computation for the relocations as well as the relaxation from Initial Exec to Local Exec.

Initial Exec:

  pld r9, x at got@tprel at pcrel
  add r9, r9, x at tls@pcrel

or

  pld r9, x at got@tprel at pcrel
  lbzx r10, r9, x at tls@pcrel

Note that @tls at pcrel is actually encoded as R_PPC64_TLS with a one byte
displacement.

      

For the above examples relaxing Intitial Exec to Local Exec:

  paddi r9, r9, x at tprel
  nop

or

  paddi r9, r13, x at tprel
  lbz r10, 0(r9)


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D86893

Files:
  lld/ELF/Arch/PPC64.cpp
  lld/test/ELF/Inputs/ppc64-tls-vardef.s
  lld/test/ELF/ppc64-tls-pcrel-ie.s

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