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129 lines
3.4 KiB
129 lines
3.4 KiB
//===- ARMGOT.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 "ARMGOT.h"
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#include "mcld/LD/LDSection.h"
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#include "mcld/LD/LDFileFormat.h"
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#include "mcld/Support/MsgHandling.h"
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#include <llvm/Support/Casting.h>
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namespace {
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const unsigned int ARMGOT0Num = 3;
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} // end of anonymous namespace
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namespace mcld {
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//===----------------------------------------------------------------------===//
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// ARMGOT
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ARMGOT::ARMGOT(LDSection& pSection)
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: GOT(pSection), m_pGOTPLTFront(NULL), m_pGOTFront(NULL) {
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// create GOT0, and put them into m_SectionData immediately
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for (unsigned int i = 0; i < ARMGOT0Num; ++i)
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new ARMGOTEntry(0, m_SectionData);
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}
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ARMGOT::~ARMGOT() {
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}
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bool ARMGOT::hasGOT1() const {
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return ((!m_GOT.empty()) || (!m_GOTPLT.empty()));
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}
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ARMGOTEntry* ARMGOT::createGOT() {
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ARMGOTEntry* entry = new ARMGOTEntry(0, NULL);
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m_GOT.push_back(entry);
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return entry;
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}
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ARMGOTEntry* ARMGOT::createGOTPLT() {
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ARMGOTEntry* entry = new ARMGOTEntry(0, NULL);
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m_GOTPLT.push_back(entry);
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return entry;
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}
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void ARMGOT::finalizeSectionSize() {
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uint32_t offset = 0;
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SectionData::FragmentListType& frag_list = m_SectionData->getFragmentList();
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// setup GOT0 offset
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SectionData::iterator frag, fragEnd = m_SectionData->end();
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for (frag = m_SectionData->begin(); frag != fragEnd; ++frag) {
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frag->setOffset(offset);
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offset += frag->size();
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}
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// push GOTPLT into the SectionData and setup the offset
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if (!m_GOTPLT.empty()) {
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m_pGOTPLTFront = m_GOTPLT.front();
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entry_iterator it, end = m_GOTPLT.end();
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for (it = m_GOTPLT.begin(); it != end; ++it) {
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ARMGOTEntry* entry = *it;
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frag_list.push_back(entry);
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entry->setParent(m_SectionData);
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entry->setOffset(offset);
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offset += entry->size();
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}
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}
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m_GOTPLT.clear();
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// push GOT into the SectionData and setup the offset
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if (!m_GOT.empty()) {
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m_pGOTFront = m_GOT.front();
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entry_iterator it, end = m_GOT.end();
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for (it = m_GOT.begin(); it != end; ++it) {
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ARMGOTEntry* entry = *it;
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frag_list.push_back(entry);
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entry->setParent(m_SectionData);
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entry->setOffset(offset);
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offset += entry->size();
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}
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}
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m_GOT.clear();
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// set section size
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m_Section.setSize(offset);
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}
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void ARMGOT::applyGOT0(uint64_t pAddress) {
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llvm::cast<ARMGOTEntry>(*(m_SectionData->getFragmentList().begin()))
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.setValue(pAddress);
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}
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void ARMGOT::applyGOTPLT(uint64_t pPLTBase) {
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if (m_pGOTPLTFront == NULL)
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return;
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SectionData::iterator entry(m_pGOTPLTFront);
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SectionData::iterator e_end;
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if (m_pGOTFront == NULL)
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e_end = m_SectionData->end();
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else
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e_end = SectionData::iterator(m_pGOTFront);
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while (entry != e_end) {
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llvm::cast<ARMGOTEntry>(entry)->setValue(pPLTBase);
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++entry;
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}
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}
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uint64_t ARMGOT::emit(MemoryRegion& pRegion) {
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uint32_t* buffer = reinterpret_cast<uint32_t*>(pRegion.begin());
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ARMGOTEntry* got = NULL;
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uint64_t result = 0x0;
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for (iterator it = begin(), ie = end(); it != ie; ++it, ++buffer) {
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got = &(llvm::cast<ARMGOTEntry>((*it)));
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*buffer = static_cast<uint32_t>(got->getValue());
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result += ARMGOTEntry::EntrySize;
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}
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return result;
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}
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} // namespace mcld
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