121 lines
4.0 KiB
C++
121 lines
4.0 KiB
C++
//===- lib/ReaderWriter/ELF/Mips/MipsExecutableWriter.h -------------------===//
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//
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// The LLVM Linker
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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 LLD_READER_WRITER_ELF_MIPS_MIPS_EXECUTABLE_WRITER_H
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#define LLD_READER_WRITER_ELF_MIPS_MIPS_EXECUTABLE_WRITER_H
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#include "ExecutableWriter.h"
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#include "MipsDynamicTable.h"
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#include "MipsELFWriters.h"
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#include "MipsLinkingContext.h"
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namespace lld {
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namespace elf {
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template <typename ELFT> class MipsTargetLayout;
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template <class ELFT>
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class MipsExecutableWriter : public ExecutableWriter<ELFT> {
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public:
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MipsExecutableWriter(MipsLinkingContext &context,
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MipsTargetLayout<ELFT> &layout);
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protected:
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void buildDynamicSymbolTable(const File &file) override;
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// Add any runtime files and their atoms to the output
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bool createImplicitFiles(std::vector<std::unique_ptr<File>> &) override;
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void finalizeDefaultAtomValues() override;
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error_code setELFHeader() override {
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ExecutableWriter<ELFT>::setELFHeader();
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_writeHelper.setELFHeader(*this->_elfHeader);
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return error_code::success();
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}
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LLD_UNIQUE_BUMP_PTR(DynamicTable<ELFT>) createDynamicTable();
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LLD_UNIQUE_BUMP_PTR(DynamicSymbolTable<ELFT>) createDynamicSymbolTable();
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private:
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void addDefaultAtoms() {
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if (this->_context.isDynamic()) {
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_mipsRuntimeFile->addAbsoluteAtom("_GLOBAL_OFFSET_TABLE_");
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_mipsRuntimeFile->addAbsoluteAtom("_gp");
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_mipsRuntimeFile->addAbsoluteAtom("_gp_disp");
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}
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}
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MipsELFWriter<ELFT> _writeHelper;
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std::unique_ptr<MipsRuntimeFile<ELFT>> _mipsRuntimeFile;
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MipsLinkingContext &_mipsContext;
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MipsTargetLayout<Mips32ElELFType> &_mipsTargetLayout;
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};
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template <class ELFT>
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MipsExecutableWriter<ELFT>::MipsExecutableWriter(MipsLinkingContext &context,
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MipsTargetLayout<ELFT> &layout)
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: ExecutableWriter<ELFT>(context, layout),
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_writeHelper(context, layout),
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_mipsRuntimeFile(new MipsRuntimeFile<ELFT>(context)),
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_mipsContext(context), _mipsTargetLayout(layout) {}
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template <class ELFT>
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void MipsExecutableWriter<ELFT>::buildDynamicSymbolTable(const File &file) {
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// MIPS ABI requires to add to dynsym even undefined symbols
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// if they have a corresponding entries in a global part of GOT.
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for (const UndefinedAtom *a : file.undefined())
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// FIXME (simon): Consider to move this check to the
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// MipsELFUndefinedAtom class method. That allows to
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// handle more complex coditions in the future.
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if (_writeHelper.hasGlobalGOTEntry(a))
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this->_dynamicSymbolTable->addSymbol(a, ELF::SHN_UNDEF);
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ExecutableWriter<ELFT>::buildDynamicSymbolTable(file);
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}
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template <class ELFT>
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bool MipsExecutableWriter<ELFT>::createImplicitFiles(
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std::vector<std::unique_ptr<File>> &result) {
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ExecutableWriter<ELFT>::createImplicitFiles(result);
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// Add the default atoms as defined for mips
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addDefaultAtoms();
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result.push_back(std::move(_mipsRuntimeFile));
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return true;
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}
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template <class ELFT>
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void MipsExecutableWriter<ELFT>::finalizeDefaultAtomValues() {
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// Finalize the atom values that are part of the parent.
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ExecutableWriter<ELFT>::finalizeDefaultAtomValues();
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_writeHelper.finalizeMipsRuntimeAtomValues();
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}
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/// \brief create dynamic table
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template <class ELFT>
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LLD_UNIQUE_BUMP_PTR(DynamicTable<ELFT>)
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MipsExecutableWriter<ELFT>::createDynamicTable() {
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return LLD_UNIQUE_BUMP_PTR(DynamicTable<ELFT>)(new (
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this->_alloc) MipsDynamicTable<ELFT>(_mipsContext, _mipsTargetLayout));
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}
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/// \brief create dynamic symbol table
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template <class ELFT>
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LLD_UNIQUE_BUMP_PTR(DynamicSymbolTable<ELFT>)
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MipsExecutableWriter<ELFT>::createDynamicSymbolTable() {
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return LLD_UNIQUE_BUMP_PTR(
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DynamicSymbolTable<ELFT>)(new (this->_alloc) MipsDynamicSymbolTable<ELFT>(
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_mipsContext, _mipsTargetLayout));
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}
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} // namespace elf
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} // namespace lld
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#endif
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