Linkloader improvement: mclinker.

Change-Id: I8805e39ccbc2ee204234fb3e71c70c906f3990bb

1 files changed, 86 insertions, 0 deletions

diff --git a/include/mcld/LD/GNUArchiveReader.h b/include/mcld/LD/GNUArchiveReader.h
new file mode 100644
index 0000000..57aee10
--- /dev/null
+++ b/include/mcld/LD/GNUArchiveReader.h
@@ -0,0 +1,86 @@
+//===- GNUArchiveReader.h -------------------------------------------------===//
+//
+//                     The MCLinker Project
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+#ifndef MCLD_GNU_ARCHIVE_READER_H
+#define MCLD_GNU_ARCHIVE_READER_H
+#ifdef ENABLE_UNITTEST
+#include <gtest.h>
+#endif
+
+#include "mcld/LD/ArchiveReader.h"
+#include "mcld/Support/Path.h"
+#include <llvm/ADT/OwningPtr.h>
+
+#include <vector>
+#include <string>
+
+namespace llvm
+{
+class MemoryBuffer;
+
+}
+
+namespace mcld
+{
+class MCLDInfo;
+class Input;
+class InputTree;
+
+/** \class GNUArchiveReader
+ *  \brief GNUArchiveReader reads GNU archive files.
+ */
+class GNUArchiveReader : public ArchiveReader
+{
+private:
+  struct ArchiveMemberHeader;
+  struct SymbolTableEntry;
+
+public:
+  explicit GNUArchiveReader(MCLDInfo &pLDInfo, LDReader::Endian endian)
+  : m_pLDInfo(pLDInfo),
+    m_endian(endian)
+  { }
+
+  ~GNUArchiveReader()
+  { }
+
+  /// Read an archive and extract each member in.
+  /// Construct the coresponding Input for each member.
+  InputTree *readArchive(Input &input);
+
+  bool isMyFormat(Input &input) const;
+
+  LDReader::Endian endian(Input& pFile) const;
+
+private:
+  /// set up the archive, including
+  /// first, read symbol table
+  /// second, read extended file name which is used in thin archive
+  InputTree *setupNewArchive(Input &pInput, size_t off);
+
+  /// parse the archive header, and return the member size
+  size_t parseMemberHeader(llvm::OwningPtr<llvm::MemoryBuffer> &mapFile,
+                   off_t off,
+                   std::string *p_Name,
+                   off_t *nestedOff,
+                   std::string &p_ExtendedName);
+
+  void readSymbolTable(llvm::OwningPtr<llvm::MemoryBuffer> &mapFile,
+                      std::vector<SymbolTableEntry> &pSymbolTable,
+                      off_t start,
+                      size_t size);
+
+private:
+  MCLDInfo &m_pLDInfo;
+  LDReader::Endian m_endian;
+};
+
+} // namespace of mcld
+
+#endif
+