[all-commits] [llvm/llvm-project] d9afe8: [yaml2obj/obj2yaml] - Refine handling of SHT_GNU_v...

[Georgii Rymar via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: d9afe8588e49f1a2779ab1fe7ff2ec39e8d080fd
      https://github.com/llvm/llvm-project/commit/d9afe8588e49f1a2779ab1fe7ff2ec39e8d080fd
  Author: Georgii Rymar <grimar at accesssoftek.com>
  Date:   2021-01-15 (Fri, 15 Jan 2021)

  Changed paths:
    M llvm/include/llvm/ObjectYAML/ELFYAML.h
    M llvm/lib/ObjectYAML/ELFEmitter.cpp
    M llvm/lib/ObjectYAML/ELFYAML.cpp
    M llvm/test/tools/obj2yaml/ELF/verdef-section.yaml
    M llvm/test/tools/yaml2obj/ELF/verdef-section.yaml
    M llvm/tools/obj2yaml/elf2yaml.cpp

  Log Message:
  -----------
  [yaml2obj/obj2yaml] - Refine handling of SHT_GNU_verdef sections.

This patch:
1) Makes `Version`, `Flags`, `VersionNdx` and `Hash` fields to be `Optional<>`.
2) Disallows dumping version definitions that have `vd_version != 1`.
   `vd_version` identifies the version of the structure itself.
   (https://refspecs.linuxfoundation.org/LSB_5.0.0/LSB-Core-generic/LSB-Core-generic/symversion.html,
    https://docs.oracle.com/cd/E19683-01/816-7777/chapter6-80869/index.html)
3) Stops dumping default values for `Version`, `Flags`, `VersionNdx` and `Hash` fields.
4) Refines testing.

Differential revision: https://reviews.llvm.org/D94659