[all-commits] [llvm/llvm-project] 075cca: [RTDYLD] support absolute relocations where needed

[Valentin Churavy via All-commits]

  Branch: refs/heads/release/11.x
  Home:   https://github.com/llvm/llvm-project
  Commit: 075cca3448389e97d60a9bb61f313642c31653dc
      https://github.com/llvm/llvm-project/commit/075cca3448389e97d60a9bb61f313642c31653dc
  Author: Valentin Churavy <v.churavy at gmail.com>
  Date:   2020-11-26 (Thu, 26 Nov 2020)

  Changed paths:
    M llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyld.cpp

  Log Message:
  -----------
  [RTDYLD] support absolute relocations where needed

These appear in some sections, such as DWARF tables, since
RuntimeDyldELF explicitly maps to this as a sentinel value:
https://github.com/llvm/llvm-project/blob/29d1fba7b5335d969e3e5daa84b7a25cd1fa75ef/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.cpp#L1199

That could then be a source of problems if it tried to examine these
sections (for example, with either setProcessAllSections(true) or ORCv2 on i686).

Replaces https://reviews.llvm.org/D89241

Reviewed By: lhames, vchuravy

Differential Revision: https://reviews.llvm.org/D90722

(cherry picked from commit 85f4be09124cc53e1a18a884ac7caf19988ab2a5)