[all-commits] [llvm/llvm-project] b92200: [RelocationResolver] Support R_PPC_REL32 & R_PPC64...

[Fangrui Song via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: b922004ea29d54534c4f09b9cfa655bf5f3360f0
      https://github.com/llvm/llvm-project/commit/b922004ea29d54534c4f09b9cfa655bf5f3360f0
  Author: Fangrui Song <i at maskray.me>
  Date:   2020-07-17 (Fri, 17 Jul 2020)

  Changed paths:
    M llvm/lib/Object/RelocationResolver.cpp
    A llvm/test/DebugInfo/PowerPC/eh-frame.ll

  Log Message:
  -----------
  [RelocationResolver] Support R_PPC_REL32 & R_PPC64_REL{32,64}

This suppresses `failed to compute relocation: R_PPC_REL32, Invalid data was encountered while parsing the file`
and its 64-bit variants when running llvm-dwarfdump on a PowerPC object file with .eh_frame

Unfortunately it is difficult to test the computation:
DWARFDataExtractor::getEncodedPointer does not use the relocated value
and even if it does, we need to teach llvm-dwarfdump --eh-frame to do
some linker job to report a reasonable address.