[PATCH] D137879: [MachO][ObjCopy] Handle exports trie in LC_DYLD_INFO and LC_DYLD_EXPORTS_TRIE

[Daniel Rodríguez Troitiño via Phabricator via llvm-commits]

drodriguez created this revision.
drodriguez added reviewers: jhenderson, alexander-shaposhnikov, MaskRay.
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The exports trie used to be pointed by the information in LC_DYLD_INFO,
but when chained fixups are present, the exports trie is pointed by
LC_DYLD_EXPORTS_TRIE instead.

Modify ObjCopy code to calculate the right offset and size needed
depending on the existence of LC_DYLD_INFO or LC_DYLD_EXPORTS_TRIE, read
the exports from either of those places, and write the export
information as pointed to either of those places.

Depends on D134571 <https://reviews.llvm.org/D134571>.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D137879

Files:
  llvm/lib/ObjCopy/MachO/MachOLayoutBuilder.cpp
  llvm/lib/ObjCopy/MachO/MachOReader.cpp
  llvm/lib/ObjCopy/MachO/MachOWriter.cpp
  llvm/test/tools/llvm-objdump/MachO/exports-trie-lc.test

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