83 lines
2.3 KiB
C++
83 lines
2.3 KiB
C++
//===- lib/ReaderWriter/ELF/Mips/MipsSectionChunks.h ----------------------===//
|
|
//
|
|
// The LLVM Linker
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
#ifndef LLD_READER_WRITER_ELF_MIPS_SECTION_CHUNKS_H
|
|
#define LLD_READER_WRITER_ELF_MIPS_SECTION_CHUNKS_H
|
|
|
|
namespace lld {
|
|
namespace elf {
|
|
|
|
template <typename ELFT> class MipsTargetLayout;
|
|
class MipsLinkingContext;
|
|
|
|
/// \brief Handle Mips GOT section
|
|
template <class ELFType> class MipsGOTSection : public AtomSection<ELFType> {
|
|
public:
|
|
MipsGOTSection(const MipsLinkingContext &context)
|
|
: AtomSection<ELFType>(context, ".got", DefinedAtom::typeGOT,
|
|
DefinedAtom::permRW_,
|
|
MipsTargetLayout<ELFType>::ORDER_GOT),
|
|
_globalCount(0) {
|
|
this->_flags |= SHF_MIPS_GPREL;
|
|
this->_align2 = 4;
|
|
}
|
|
|
|
/// \brief Number of local GOT entries.
|
|
std::size_t getLocalCount() const {
|
|
return this->_atoms.size() - _globalCount;
|
|
}
|
|
|
|
/// \brief Number of global GOT entries.
|
|
std::size_t getGlobalCount() const { return _globalCount; }
|
|
|
|
/// \brief Compare two atoms accordingly theirs positions in the GOT.
|
|
bool compare(const Atom *a, const Atom *b) const {
|
|
auto ia = _posMap.find(a);
|
|
auto ib = _posMap.find(b);
|
|
|
|
if (ia != _posMap.end() && ib != _posMap.end())
|
|
return ia->second < ib->second;
|
|
|
|
return ia == _posMap.end() && ib != _posMap.end();
|
|
}
|
|
|
|
virtual const lld::AtomLayout &appendAtom(const Atom *atom) {
|
|
const DefinedAtom *da = dyn_cast<DefinedAtom>(atom);
|
|
|
|
const Atom *ta = nullptr;
|
|
for (const auto &r : *da) {
|
|
if (r->kindNamespace() != lld::Reference::KindNamespace::ELF)
|
|
continue;
|
|
assert(r->kindArch() == Reference::KindArch::Mips);
|
|
if (r->kindValue() == LLD_R_MIPS_GLOBAL_GOT) {
|
|
ta = r->target();
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (ta) {
|
|
_posMap[ta] = _posMap.size();
|
|
++_globalCount;
|
|
}
|
|
|
|
return AtomSection<ELFType>::appendAtom(atom);
|
|
}
|
|
|
|
private:
|
|
/// \brief Number of global GOT entries.
|
|
std::size_t _globalCount;
|
|
|
|
/// \brief Map Atoms to their GOT entry index.
|
|
llvm::DenseMap<const Atom *, std::size_t> _posMap;
|
|
};
|
|
|
|
} // elf
|
|
} // lld
|
|
|
|
#endif
|