[PATCH] D80392: [WIP][mips] Use pc-relative relocations in .eh_frame

[Simon Atanasyan via Phabricator via llvm-commits]

atanasyan created this revision.
atanasyan added reviewers: sdardis, dsanders, arichardson, MaskRay.
Herald added subscribers: jrtc27, hiraditya, emaste.
Herald added a reviewer: espindola.
Herald added a project: LLVM.
atanasyan added a parent revision: D80390: [WIP][mips] Support 64-bit relative relocations.

Use pc-relative relocations in .eh_frame. `R_MIPS_PC32` relocation is generated in 32-bit case. `R_MIPS_PC32 | R_MIPS_64` relocation chain is generated in 64-bit case for all code model.

With this change object files can be linked by LLD without having to pass `-Wl,-z,notext` options.

Now this patch is rather "proof-of-concept". Not a commit ready changes. Any comments are welcome.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D80392

Files:
  lld/test/ELF/mips-eh_frame-pic.s
  llvm/lib/CodeGen/TargetLoweringObjectFileImpl.cpp
  llvm/lib/MC/MCObjectFileInfo.cpp
  llvm/lib/Object/RelocationResolver.cpp
  llvm/test/CodeGen/Mips/ehframe-indirect.ll
  llvm/test/DebugInfo/Mips/eh_frame.ll
  llvm/test/MC/Mips/eh-frame.s

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