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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_ELF_OBJECT_READER_H
10 #define MCLD_ELF_OBJECT_READER_H
11 #ifdef ENABLE_UNITTEST
12 #include <gtest.h>
13 #endif
14 
15 #include <mcld/LD/ObjectReader.h>
16 #include <mcld/ADT/Flags.h>
17 
18 namespace mcld {
19 
20 class Module;
21 class Input;
22 class IRBuilder;
23 class GNULDBackend;
24 class ELFReaderIF;
25 class EhFrameReader;
26 class LinkerConfig;
27 
28 /** \lclass ELFObjectReader
29  *  \brief ELFObjectReader reads target-independent parts of ELF object file
30  */
31 class ELFObjectReader : public ObjectReader
32 {
33 public:
34   enum ReadFlagType {
35     ParseEhFrame    = 0x1, ///< parse .eh_frame section if the bit is set.
36     NumOfReadFlags  = 1
37   };
38 
39   typedef Flags<ReadFlagType> ReadFlag;
40 
41 public:
42   ELFObjectReader(GNULDBackend& pBackend,
43                   IRBuilder& pBuilder,
44                   const LinkerConfig& pConfig);
45 
46   ~ELFObjectReader();
47 
48   // -----  observers  ----- //
49   bool isMyFormat(Input &pFile) const;
50 
51   // -----  readers  ----- //
52   bool readHeader(Input& pFile);
53 
54   virtual bool readSections(Input& pFile);
55 
56   virtual bool readSymbols(Input& pFile);
57 
58   /// readRelocations - read relocation sections
59   ///
60   /// This function should be called after symbol resolution.
61   virtual bool readRelocations(Input& pFile);
62 
63 private:
64   ELFReaderIF* m_pELFReader;
65   EhFrameReader* m_pEhFrameReader;
66   IRBuilder& m_Builder;
67   ReadFlag m_ReadFlag;
68   GNULDBackend& m_Backend;
69   const LinkerConfig& m_Config;
70 };
71 
72 } // namespace of mcld
73 
74 #endif
75 
76