1 //===- AlignFragment.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_FRAGMENT_ALIGNFRAGMENT_H 10 #define MCLD_FRAGMENT_ALIGNFRAGMENT_H 11 12 #include <mcld/Fragment/Fragment.h> 13 14 namespace mcld { 15 16 class SectionData; 17 18 class AlignFragment : public Fragment 19 { 20 public: 21 AlignFragment(unsigned int pAlignment, int64_t pValue, unsigned int pValueSize, 22 unsigned int pMaxBytesToEmit, SectionData *pSD = NULL); 23 getAlignment()24 unsigned int getAlignment() const { return m_Alignment; } 25 getValue()26 int64_t getValue() const { return m_Value; } 27 getValueSize()28 unsigned int getValueSize() const { return m_ValueSize; } 29 getMaxBytesToEmit()30 unsigned int getMaxBytesToEmit() const { return m_MaxBytesToEmit; } 31 hasEmitNops()32 bool hasEmitNops() const { return m_bEmitNops; } 33 setEmitNops(bool pValue)34 void setEmitNops(bool pValue) { m_bEmitNops = pValue; } 35 classof(const Fragment * F)36 static bool classof(const Fragment *F) 37 { return F->getKind() == Fragment::Alignment; } classof(const AlignFragment *)38 static bool classof(const AlignFragment *) { return true; } 39 40 size_t size() const; 41 42 private: 43 /// Alignment - The alignment to ensure, in bytes. 44 unsigned int m_Alignment; 45 46 /// Value - Value to use for filling padding bytes. 47 int64_t m_Value; 48 49 /// ValueSize - The size of the integer (in bytes) of \arg Value. 50 unsigned int m_ValueSize; 51 52 /// MaxBytesToEmit - The maximum number of bytes to emit; if the alignment 53 /// cannot be satisfied in this width then this fragment is ignored. 54 unsigned int m_MaxBytesToEmit; 55 56 /// EmitNops - Flag to indicate that (optimal) NOPs should be emitted instead 57 /// of using the provided value. The exact interpretation of this flag is 58 /// target dependent. 59 bool m_bEmitNops : 1; 60 61 }; 62 63 } // namespace of mcld 64 65 #endif 66 67