[PATCH] D83603: [lld-macho] Support __dso_handle for C++

[Jez Ng via Phabricator via llvm-commits]

int3 created this revision.
int3 added a reviewer: lld-macho.
Herald added a project: LLVM.
Herald added a subscriber: llvm-commits.

The C++ ABI requires dylibs to pass a pointer to __cxa_atexit which does
e.g. cleanup of static global variables. The C++ spec says that the pointer
can point to any address in one of the dylib's segments, but in practice
ld64 seems to set it to point to the header, so that's what's implemented
here.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D83603

Files:
  lld/MachO/Driver.cpp
  lld/MachO/SymbolTable.cpp
  lld/MachO/SymbolTable.h
  lld/MachO/Symbols.cpp
  lld/MachO/Symbols.h
  lld/MachO/SyntheticSections.h
  lld/MachO/Writer.cpp
  lld/test/MachO/dso-handle-no-override.s
  lld/test/MachO/dso-handle.s

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