From 1c98619801a5705c688e683be3ef9d70169a0686 Mon Sep 17 00:00:00 2001
From: Dimitry Andric <dim@FreeBSD.org>
Date: Sat, 23 Jul 2016 20:48:50 +0000
Subject: Vendor import of lld release_39 branch r276489:
 https://llvm.org/svn/llvm-project/lld/branches/release_39@276489

---
 lib/ReaderWriter/ELF/DynamicFile.cpp | 146 -----------------------------------
 1 file changed, 146 deletions(-)
 delete mode 100644 lib/ReaderWriter/ELF/DynamicFile.cpp

(limited to 'lib/ReaderWriter/ELF/DynamicFile.cpp')

diff --git a/lib/ReaderWriter/ELF/DynamicFile.cpp b/lib/ReaderWriter/ELF/DynamicFile.cpp
deleted file mode 100644
index 5339c7d66577..000000000000
--- a/lib/ReaderWriter/ELF/DynamicFile.cpp
+++ /dev/null
@@ -1,146 +0,0 @@
-//===- lib/ReaderWriter/ELF/DynamicFile.cpp -------------------------------===//
-//
-//                             The LLVM Linker
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-
-#include "DynamicFile.h"
-#include "FileCommon.h"
-#include "lld/ReaderWriter/ELFLinkingContext.h"
-#include "llvm/ADT/STLExtras.h"
-#include "llvm/Object/ELF.h"
-#include "llvm/Support/Path.h"
-
-namespace lld {
-namespace elf {
-
-template <class ELFT>
-DynamicFile<ELFT>::DynamicFile(std::unique_ptr<MemoryBuffer> mb,
-                               ELFLinkingContext &ctx)
-    : SharedLibraryFile(mb->getBufferIdentifier()), _mb(std::move(mb)),
-      _ctx(ctx), _useShlibUndefines(ctx.useShlibUndefines()) {}
-
-template <typename ELFT>
-std::error_code DynamicFile<ELFT>::isCompatible(MemoryBufferRef mb,
-                                                ELFLinkingContext &ctx) {
-  return elf::isCompatible<ELFT>(mb, ctx);
-}
-
-template <class ELFT>
-const SharedLibraryAtom *DynamicFile<ELFT>::exports(StringRef name,
-                                                    bool dataSymbolOnly) const {
-  assert(!dataSymbolOnly && "Invalid option for ELF exports!");
-  // See if we have the symbol.
-  auto sym = _nameToSym.find(name);
-  if (sym == _nameToSym.end())
-    return nullptr;
-  // Have we already created a SharedLibraryAtom for it?
-  if (sym->second._atom)
-    return sym->second._atom;
-  // Create a SharedLibraryAtom for this symbol.
-  return sym->second._atom = new (_alloc)
-             ELFDynamicAtom<ELFT>(*this, name, _soname, sym->second._symbol);
-}
-
-template <class ELFT> StringRef DynamicFile<ELFT>::getDSOName() const {
-  return _soname;
-}
-
-template <class ELFT> bool DynamicFile<ELFT>::canParse(file_magic magic) {
-  return magic == file_magic::elf_shared_object;
-}
-
-template <class ELFT> std::error_code DynamicFile<ELFT>::doParse() {
-  typedef llvm::object::ELFFile<ELFT> ELFO;
-  typedef typename ELFO::Elf_Shdr Elf_Shdr;
-  typedef typename ELFO::Elf_Dyn Elf_Dyn;
-
-  std::error_code ec;
-  _objFile.reset(new ELFO(_mb->getBuffer(), ec));
-  if (ec)
-    return ec;
-
-  ELFO &obj = *_objFile;
-
-  const char *base = _mb->getBuffer().data();
-  const Elf_Dyn *dynStart = nullptr;
-  const Elf_Dyn *dynEnd = nullptr;
-
-  const Elf_Shdr *dynSymSec = nullptr;
-  for (const Elf_Shdr &sec : obj.sections()) {
-    switch (sec.sh_type) {
-    case llvm::ELF::SHT_DYNAMIC: {
-      dynStart = reinterpret_cast<const Elf_Dyn *>(base + sec.sh_offset);
-      uint64_t size = sec.sh_size;
-      if (size % sizeof(Elf_Dyn))
-        return llvm::object::object_error::parse_failed;
-      dynEnd = dynStart + size / sizeof(Elf_Dyn);
-      break;
-    }
-    case llvm::ELF::SHT_DYNSYM:
-      dynSymSec = &sec;
-      break;
-    }
-  }
-
-  ErrorOr<StringRef> strTableOrErr = obj.getStringTableForSymtab(*dynSymSec);
-  if (std::error_code ec = strTableOrErr.getError())
-    return ec;
-  StringRef stringTable = *strTableOrErr;
-
-  for (const Elf_Dyn &dyn : llvm::make_range(dynStart, dynEnd)) {
-    if (dyn.d_tag == llvm::ELF::DT_SONAME) {
-      uint64_t offset = dyn.getVal();
-      if (offset >= stringTable.size())
-        return llvm::object::object_error::parse_failed;
-      _soname = StringRef(stringTable.data() + offset);
-      break;
-    }
-  }
-
-  if (_soname.empty())
-    _soname = llvm::sys::path::filename(path());
-
-  // Create a map from names to dynamic symbol table entries.
-  // TODO: This should use the object file's build in hash table instead if
-  // it exists.
-  for (auto i = obj.symbol_begin(dynSymSec), e = obj.symbol_end(dynSymSec);
-       i != e; ++i) {
-    auto name = i->getName(stringTable);
-    if ((ec = name.getError()))
-      return ec;
-
-    // Dont add local symbols to dynamic entries. The first symbol in the
-    // dynamic symbol table is a local symbol.
-    if (i->getBinding() == llvm::ELF::STB_LOCAL)
-      continue;
-
-    // TODO: Add absolute symbols
-    if (i->st_shndx == llvm::ELF::SHN_ABS)
-      continue;
-
-    if (i->st_shndx == llvm::ELF::SHN_UNDEF) {
-      if (!_useShlibUndefines)
-        continue;
-      // Create an undefined atom.
-      if (!name->empty()) {
-        auto *newAtom = new (_alloc) ELFUndefinedAtom<ELFT>(*this, *name, &*i);
-        _undefinedAtoms.push_back(newAtom);
-      }
-      continue;
-    }
-    _nameToSym[*name]._symbol = &*i;
-  }
-  return std::error_code();
-}
-
-template class DynamicFile<ELF32LE>;
-template class DynamicFile<ELF32BE>;
-template class DynamicFile<ELF64LE>;
-template class DynamicFile<ELF64BE>;
-
-} // end namespace elf
-} // end namespace lld
-- 
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