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85 lines
2.0 KiB
85 lines
2.0 KiB
4 months ago
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//===- ARMGOT.h -----------------------------------------------------------===//
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//
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// The MCLinker Project
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#ifndef TARGET_ARM_ARMGOT_H_
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#define TARGET_ARM_ARMGOT_H_
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#include "mcld/Support/MemoryRegion.h"
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#include "mcld/Target/GOT.h"
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#include <llvm/ADT/DenseMap.h>
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#include <vector>
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namespace mcld {
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class LDSection;
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/** \class ARMGOTEntry
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* \brief GOT Entry with size of 4 bytes
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*/
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class ARMGOTEntry : public GOT::Entry<4> {
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public:
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ARMGOTEntry(uint64_t pContent, SectionData* pParent)
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: GOT::Entry<4>(pContent, pParent) {}
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};
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/** \class ARMGOT
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* \brief ARM Global Offset Table.
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*
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* ARM GOT integrates traditional .got.plt and .got sections into one.
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* Traditional .got.plt is placed in the front part of GOT (PLTGOT), and
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* traditional .got is placed in the rear part of GOT (GOT).
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*
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* ARM .got
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* +--------------+
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* | GOT0 |
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* +--------------+
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* | GOTPLT |
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* +--------------+
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* | GOT |
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* +--------------+
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*
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*/
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class ARMGOT : public GOT {
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public:
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explicit ARMGOT(LDSection& pSection);
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~ARMGOT();
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ARMGOTEntry* createGOT();
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ARMGOTEntry* createGOTPLT();
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void finalizeSectionSize();
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uint64_t emit(MemoryRegion& pRegion);
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void applyGOT0(uint64_t pAddress);
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void applyGOTPLT(uint64_t pPLTBase);
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bool hasGOT1() const;
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private:
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typedef std::vector<ARMGOTEntry*> EntryListType;
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typedef EntryListType::iterator entry_iterator;
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typedef EntryListType::const_iterator const_entry_iterator;
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private:
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ARMGOTEntry* m_pGOTPLTFront;
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ARMGOTEntry* m_pGOTFront;
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/// m_GOTPLTEntries - a list of gotplt entries
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EntryListType m_GOTPLT;
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/// m_GOTEntris - a list of got entries
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EntryListType m_GOT;
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};
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} // namespace mcld
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#endif // TARGET_ARM_ARMGOT_H_
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