[PATCH] D112386: [ELF][X86] Support R_X86_64_PLTOFF64

[Fangrui Song via Phabricator via llvm-commits]

MaskRay created this revision.
MaskRay added reviewers: arichardson, jhenderson, peter.smith.
Herald added subscribers: ormris, pengfei, s.egerton, steven_wu, simoncook, hiraditya, inglorion, emaste.
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For a function call, GCC `-mcmodel=large` generates an assembly modifier which
leads to an R_X86_64_PLTOFF64 relocation. In real world,
http://git.ageinghacker.net/jitter (used by GNU poke) uses `-mcmodel=large`.

R_X86_64_PLTOFF64's formula is (if preemptible) L - GOT + A or (if non-preemptible) S - GOT + A.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D112386

Files:
  lld/ELF/Arch/X86_64.cpp
  lld/ELF/InputSection.cpp
  lld/ELF/Relocations.cpp
  lld/ELF/Relocations.h
  lld/test/ELF/x86-64-reloc-pltoff64.s

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