ELFObjectReader.h revision 37b74a387bb3993387029859c2d9d051c41c724e 
1//===- ELFObjectReader.h --------------------------------------------------===//
2//
3//                     The MCLinker Project
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9#ifndef MCLD_LD_ELFOBJECTREADER_H_
10#define MCLD_LD_ELFOBJECTREADER_H_
11
12#include "mcld/ADT/Flags.h"
13#include "mcld/LD/ObjectReader.h"
14
15namespace mcld {
16
17class EhFrameReader;
18class ELFReaderIF;
19class Input;
20class IRBuilder;
21class GNULDBackend;
22class LinkerConfig;
23
24/** \lclass ELFObjectReader
25 *  \brief ELFObjectReader reads target-independent parts of ELF object file
26 */
27class ELFObjectReader : public ObjectReader {
28 public:
29  enum ReadFlagType {
30    ParseEhFrame = 0x1,  ///< parse .eh_frame section if the bit is set.
31    NumOfReadFlags = 1
32  };
33
34  typedef Flags<ReadFlagType> ReadFlag;
35
36 public:
37  ELFObjectReader(GNULDBackend& pBackend,
38                  IRBuilder& pBuilder,
39                  const LinkerConfig& pConfig);
40
41  ~ELFObjectReader();
42
43  // -----  observers  ----- //
44  bool isMyFormat(Input& pFile, bool& pContinue) const;
45
46  // -----  readers  ----- //
47  bool readHeader(Input& pFile);
48
49  virtual bool readSections(Input& pFile);
50
51  virtual bool readSymbols(Input& pFile);
52
53  /// readRelocations - read relocation sections
54  ///
55  /// This function should be called after symbol resolution.
56  virtual bool readRelocations(Input& pFile);
57
58 private:
59  ELFReaderIF* m_pELFReader;
60  EhFrameReader* m_pEhFrameReader;
61  IRBuilder& m_Builder;
62  ReadFlag m_ReadFlag;
63  GNULDBackend& m_Backend;
64  const LinkerConfig& m_Config;
65};
66
67}  // namespace mcld
68
69#endif  // MCLD_LD_ELFOBJECTREADER_H_
70