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89 lines
2.7 KiB
89 lines
2.7 KiB
4 months ago
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//===- MipsELFDynamic.cpp -------------------------------------------------===//
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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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#include "mcld/LinkerConfig.h"
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#include "mcld/LD/ELFFileFormat.h"
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#include "mcld/LD/ELFSegment.h"
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#include "mcld/LD/ELFSegmentFactory.h"
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#include "mcld/Target/GNULDBackend.h"
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#include "MipsELFDynamic.h"
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#include "MipsLDBackend.h"
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#include <llvm/Support/ELF.h>
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namespace mcld {
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MipsELFDynamic::MipsELFDynamic(const MipsGNULDBackend& pParent,
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const LinkerConfig& pConfig)
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: ELFDynamic(pParent, pConfig), m_pParent(pParent), m_pConfig(pConfig) {
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}
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void MipsELFDynamic::reserveTargetEntries(const ELFFileFormat& pFormat) {
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if (pFormat.hasGOT())
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reserveOne(llvm::ELF::DT_PLTGOT);
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reserveOne(llvm::ELF::DT_MIPS_RLD_VERSION);
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reserveOne(llvm::ELF::DT_MIPS_FLAGS);
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reserveOne(llvm::ELF::DT_MIPS_BASE_ADDRESS);
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reserveOne(llvm::ELF::DT_MIPS_LOCAL_GOTNO);
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reserveOne(llvm::ELF::DT_MIPS_SYMTABNO);
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reserveOne(llvm::ELF::DT_MIPS_GOTSYM);
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if (pFormat.hasGOTPLT())
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reserveOne(llvm::ELF::DT_MIPS_PLTGOT);
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}
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void MipsELFDynamic::applyTargetEntries(const ELFFileFormat& pFormat) {
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if (pFormat.hasGOT())
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applyOne(llvm::ELF::DT_PLTGOT, pFormat.getGOT().addr());
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applyOne(llvm::ELF::DT_MIPS_RLD_VERSION, 1);
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applyOne(llvm::ELF::DT_MIPS_FLAGS, llvm::ELF::RHF_NOTPOT);
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applyOne(llvm::ELF::DT_MIPS_BASE_ADDRESS, getBaseAddress());
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applyOne(llvm::ELF::DT_MIPS_LOCAL_GOTNO, getLocalGotNum(pFormat));
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applyOne(llvm::ELF::DT_MIPS_SYMTABNO, getSymTabNum(pFormat));
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applyOne(llvm::ELF::DT_MIPS_GOTSYM, getGotSym(pFormat));
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if (pFormat.hasGOTPLT())
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applyOne(llvm::ELF::DT_MIPS_PLTGOT, pFormat.getGOTPLT().addr());
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}
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size_t MipsELFDynamic::getSymTabNum(const ELFFileFormat& pFormat) const {
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if (!pFormat.hasDynSymTab())
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return 0;
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const LDSection& dynsym = pFormat.getDynSymTab();
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return dynsym.size() / symbolSize();
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}
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size_t MipsELFDynamic::getGotSym(const ELFFileFormat& pFormat) const {
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if (!pFormat.hasGOT())
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return 0;
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return getSymTabNum(pFormat) - m_pParent.getGOT().getGlobalNum();
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}
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size_t MipsELFDynamic::getLocalGotNum(const ELFFileFormat& pFormat) const {
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if (!pFormat.hasGOT())
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return 0;
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return m_pParent.getGOT().getLocalNum();
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}
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uint64_t MipsELFDynamic::getBaseAddress() {
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if (LinkerConfig::Exec != m_pConfig.codeGenType())
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return 0;
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ELFSegmentFactory::const_iterator baseSeg =
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m_pParent.elfSegmentTable().find(llvm::ELF::PT_LOAD, 0x0, 0x0);
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return m_pParent.elfSegmentTable().end() == baseSeg ? 0 : (*baseSeg)->vaddr();
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}
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} // namespace mcld
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