[PATCH] D56031: [elfabi] Add support for reading dynamic symbols from binaries

[Armando Montanez via Phabricator via llvm-commits]

amontanez created this revision.
amontanez added reviewers: jakehehrlich, phosek, mcgrathr.
Herald added a subscriber: llvm-commits.

This patch adds initial support for reading dynamic symbols from ELF binaries. Currently, STT_NOTYPE, STT_OBJECT, STT_FUNC, and STT_TLS are explicitly supported. Other symbol types are mapped to ELFSymbolType::Unknown to improve signal/noise ratio.

Symbols must meet two criteria to be read into in an ELFStub:

- The symbol's binding must be STB_GLOBAL or STB_WEAK.
- The symbol's visibility must be STV_DEFAULT or STV_PROTECTED.

This filters out symbols that aren't of interest during compile-time linking against a shared object.


Repository:
  rL LLVM

https://reviews.llvm.org/D56031

Files:
  llvm/test/tools/llvm-elfabi/binary-read-arch.test
  llvm/test/tools/llvm-elfabi/binary-read-bad-soname.test
  llvm/test/tools/llvm-elfabi/binary-read-neededlibs.test
  llvm/test/tools/llvm-elfabi/binary-read-soname-no-null.test
  llvm/test/tools/llvm-elfabi/binary-read-soname.test
  llvm/test/tools/llvm-elfabi/binary-read-syms.test
  llvm/test/tools/llvm-elfabi/replace-soname-tbe.test
  llvm/tools/llvm-elfabi/ELFObjHandler.cpp

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