15460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao//===- ELFObjectReader.cpp ------------------------------------------------===// 25460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao// 35460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao// The MCLinker Project 45460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao// 55460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao// This file is distributed under the University of Illinois Open Source 65460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao// License. See LICENSE.TXT for details. 75460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao// 85460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao//===----------------------------------------------------------------------===// 9cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao 10cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao#include <string> 11cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao#include <cassert> 12cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao 135460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao#include <llvm/Support/ELF.h> 145460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao#include <llvm/ADT/Twine.h> 15cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao 165460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao#include <mcld/MC/MCLDInput.h> 175460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao#include <mcld/MC/MCLinker.h> 18cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao#include <mcld/LD/RegionFragment.h> 19cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao#include <mcld/LD/ELFReader.h> 20cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao#include <mcld/LD/ELFObjectReader.h> 215460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao#include <mcld/Target/GNULDBackend.h> 22affc150dc44fab1911775a49636d0ce85333b634Zonr Chang#include <mcld/Support/MsgHandling.h> 235460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao 245460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liaousing namespace mcld; 255460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao 265460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao//========================== 275460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao// ELFObjectReader 285460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao/// constructor 295460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei LiaoELFObjectReader::ELFObjectReader(GNULDBackend& pBackend, MCLinker& pLinker) 305460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao : ObjectReader(), 315460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao m_pELFReader(0), 325460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao m_Linker(pLinker) 335460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao{ 345460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao if (32 == pBackend.bitclass() && pBackend.isLittleEndian()) { 355460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao m_pELFReader = new ELFReader<32, true>(pBackend); 365460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao } 375460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao} 385460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao 395460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao/// destructor 405460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei LiaoELFObjectReader::~ELFObjectReader() 415460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao{ 425460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao delete m_pELFReader; 435460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao} 445460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao 455460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao/// isMyFormat 465460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liaobool ELFObjectReader::isMyFormat(Input &pInput) const 475460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao{ 485460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao assert(pInput.hasMemArea()); 495460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao 505460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao // Don't warning about the frequently requests. 515460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao // MemoryArea has a list of cache to handle this. 525460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao size_t hdr_size = m_pELFReader->getELFHeaderSize(); 5367e37f1be98c926645219cfb47fab9e90d8c725cShih-wei Liao MemoryRegion* region = pInput.memArea()->request(pInput.fileOffset(), 5467e37f1be98c926645219cfb47fab9e90d8c725cShih-wei Liao hdr_size); 555460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao 565460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao uint8_t* ELF_hdr = region->start(); 575460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao bool result = true; 585460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao if (!m_pELFReader->isELF(ELF_hdr)) 595460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao result = false; 605460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao else if (!m_pELFReader->isMyEndian(ELF_hdr)) 615460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao result = false; 625460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao else if (!m_pELFReader->isMyMachine(ELF_hdr)) 635460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao result = false; 645460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao else if (MCLDFile::Object != m_pELFReader->fileType(ELF_hdr)) 655460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao result = false; 665460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao pInput.memArea()->release(region); 675460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao return result; 685460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao} 695460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao 705460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao/// readObject - read section header and create LDSections. 715460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liaobool ELFObjectReader::readObject(Input& pInput) 725460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao{ 735460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao assert(pInput.hasMemArea()); 745460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao 755460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao size_t hdr_size = m_pELFReader->getELFHeaderSize(); 7667e37f1be98c926645219cfb47fab9e90d8c725cShih-wei Liao MemoryRegion* region = pInput.memArea()->request(pInput.fileOffset(), 7767e37f1be98c926645219cfb47fab9e90d8c725cShih-wei Liao hdr_size); 785460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao uint8_t* ELF_hdr = region->start(); 795460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao bool result = m_pELFReader->readSectionHeaders(pInput, m_Linker, ELF_hdr); 805460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao pInput.memArea()->release(region); 815460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao return result; 825460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao} 835460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao 845460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao/// readSections - read all regular sections. 855460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liaobool ELFObjectReader::readSections(Input& pInput) 865460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao{ 875460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao // handle sections 885460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao LDContext::sect_iterator section, sectEnd = pInput.context()->sectEnd(); 895460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao for (section = pInput.context()->sectBegin(); section != sectEnd; ++section) { 905460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao // ignore the section if the LDSection* in input context is NULL 915460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao if (NULL == *section) 925460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao continue; 935460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao 945460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao switch((*section)->kind()) { 955460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao /** group sections **/ 965460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao case LDFileFormat::Group: { 975460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao assert(NULL != (*section)->getLink()); 985460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao ResolveInfo* signature = 995460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao m_pELFReader->readSymbol(pInput, 1005460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao *(*section)->getLink(), 1015460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao m_Linker.getLDInfo(), 1025460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao (*section)->getInfo()); 1035460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao 1045460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao bool exist = false; 105affc150dc44fab1911775a49636d0ce85333b634Zonr Chang if (0 == std::strlen(signature->name()) && 106affc150dc44fab1911775a49636d0ce85333b634Zonr Chang ResolveInfo::Section == signature->type()) { 107affc150dc44fab1911775a49636d0ce85333b634Zonr Chang // if the signature is a section symbol in input object, we use the 108affc150dc44fab1911775a49636d0ce85333b634Zonr Chang // section name as group signature. 109affc150dc44fab1911775a49636d0ce85333b634Zonr Chang signatures().insert((*section)->name(), exist); 110affc150dc44fab1911775a49636d0ce85333b634Zonr Chang } else { 111affc150dc44fab1911775a49636d0ce85333b634Zonr Chang signatures().insert(signature->name(), exist); 112affc150dc44fab1911775a49636d0ce85333b634Zonr Chang } 1135460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao 1145460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao if (exist) { 1155460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao // if this is not the first time we see this group signature, then 1165460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao // ignore all the members in this group (set NULL) 11767e37f1be98c926645219cfb47fab9e90d8c725cShih-wei Liao MemoryRegion* region = pInput.memArea()->request( 11867e37f1be98c926645219cfb47fab9e90d8c725cShih-wei Liao pInput.fileOffset() + (*section)->offset(), (*section)->size()); 1195460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao llvm::ELF::Elf32_Word* value = 12067e37f1be98c926645219cfb47fab9e90d8c725cShih-wei Liao reinterpret_cast<llvm::ELF::Elf32_Word*>(region->start()); 1215460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao 1225460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao size_t size = region->size() / sizeof(llvm::ELF::Elf32_Word); 1235460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao if (llvm::ELF::GRP_COMDAT == *value) { 1245460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao for (size_t index = 1; index < size; ++index) 1255460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao pInput.context()->getSectionTable()[value[index]] = NULL; 1265460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao } 1275460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao pInput.memArea()->release(region); 1285460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao } 1295460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao break; 1305460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao } 1315460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao /** relocation sections **/ 1325460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao case LDFileFormat::Relocation: { 1335460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao assert(NULL != (*section)->getLink()); 1345460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao size_t link_index = (*section)->getLink()->index(); 1355460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao if (NULL == pInput.context()->getSectionTable()[link_index]) { 1365460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao // Relocation sections of group members should also be part of the 1375460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao // group. Thus, if the associated member sections are ignored, the 1385460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao // related relocations should be also ignored. 1395460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao *section = NULL; 1405460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao } 1415460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao break; 1425460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao } 1435460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao /** normal sections **/ 144affc150dc44fab1911775a49636d0ce85333b634Zonr Chang // FIXME: support Version Kinds 1455460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao case LDFileFormat::Version: 1465460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao /** Fall through **/ 1475460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao case LDFileFormat::Regular: 1485460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao case LDFileFormat::Note: 149affc150dc44fab1911775a49636d0ce85333b634Zonr Chang case LDFileFormat::Debug: 1505460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao case LDFileFormat::MetaData: { 1515460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao if (!m_pELFReader->readRegularSection(pInput, m_Linker, **section)) 152affc150dc44fab1911775a49636d0ce85333b634Zonr Chang fatal(diag::err_cannot_read_section) << (*section)->name(); 153affc150dc44fab1911775a49636d0ce85333b634Zonr Chang break; 154affc150dc44fab1911775a49636d0ce85333b634Zonr Chang } 155affc150dc44fab1911775a49636d0ce85333b634Zonr Chang case LDFileFormat::EhFrame: { 156affc150dc44fab1911775a49636d0ce85333b634Zonr Chang if (!m_pELFReader->readEhFrame(pInput, m_Linker, **section)) 157affc150dc44fab1911775a49636d0ce85333b634Zonr Chang fatal(diag::err_cannot_read_section) <<(*section)->name(); 158affc150dc44fab1911775a49636d0ce85333b634Zonr Chang break; 159affc150dc44fab1911775a49636d0ce85333b634Zonr Chang } 160affc150dc44fab1911775a49636d0ce85333b634Zonr Chang case LDFileFormat::GCCExceptTable: { 161affc150dc44fab1911775a49636d0ce85333b634Zonr Chang //if (!m_pELFReader->readExceptionSection(pInput, m_Linker, **section)) 162affc150dc44fab1911775a49636d0ce85333b634Zonr Chang if (!m_pELFReader->readRegularSection(pInput, m_Linker, **section)) 163affc150dc44fab1911775a49636d0ce85333b634Zonr Chang fatal(diag::err_cannot_read_section) << (*section)->name(); 1645460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao break; 1655460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao } 1665460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao /** target dependent sections **/ 1675460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao case LDFileFormat::Target: { 1685460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao if (!m_pELFReader->readTargetSection(pInput, m_Linker, **section)) 169affc150dc44fab1911775a49636d0ce85333b634Zonr Chang fatal(diag::err_cannot_read_target_section) << (*section)->name(); 1705460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao break; 1715460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao } 1725460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao /** BSS sections **/ 1735460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao case LDFileFormat::BSS: { 1745460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao LDSection& output_bss = m_Linker.getOrCreateOutputSectHdr( 1755460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao (*section)->name(), 1765460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao LDFileFormat::BSS, 1775460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao llvm::ELF::SHT_NOBITS, 1785460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao llvm::ELF::SHF_ALLOC | llvm::ELF::SHF_WRITE); 1795460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao 180cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao SectionData& sect_data = m_Linker.getOrCreateSectData(**section); 181cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao /* value, valsize, size*/ 182cedee4b38f4786845183be7f5916dd520a170ae0Shih-wei Liao FillFragment* frag = new FillFragment(0x0, 1, (*section)->size()); 1835460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao 1845460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao uint64_t size = m_Linker.getLayout().appendFragment(*frag, 1855460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao sect_data, 1865460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao (*section)->align()); 1875460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao output_bss.setSize(output_bss.size() + size); 1885460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao break; 1895460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao } 1905460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao // ignore 1915460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao case LDFileFormat::Null: 1925460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao case LDFileFormat::NamePool: 1935460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao continue; 194affc150dc44fab1911775a49636d0ce85333b634Zonr Chang // warning 195affc150dc44fab1911775a49636d0ce85333b634Zonr Chang case LDFileFormat::EhFrameHdr: 196affc150dc44fab1911775a49636d0ce85333b634Zonr Chang default: { 197affc150dc44fab1911775a49636d0ce85333b634Zonr Chang warning(diag::warn_illegal_input_section) << (*section)->name() 198affc150dc44fab1911775a49636d0ce85333b634Zonr Chang << pInput.name() 199affc150dc44fab1911775a49636d0ce85333b634Zonr Chang << pInput.path(); 200affc150dc44fab1911775a49636d0ce85333b634Zonr Chang break; 201affc150dc44fab1911775a49636d0ce85333b634Zonr Chang } 2025460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao } 2035460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao } // end of for all sections 2045460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao 2055460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao return true; 2065460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao} 2075460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao 2085460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao/// readSymbols - read symbols into MCLinker from the input relocatable object. 2095460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liaobool ELFObjectReader::readSymbols(Input& pInput) 2105460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao{ 2115460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao assert(pInput.hasMemArea()); 2125460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao 2135460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao LDSection* symtab_shdr = pInput.context()->getSection(".symtab"); 214affc150dc44fab1911775a49636d0ce85333b634Zonr Chang if (NULL == symtab_shdr) { 215affc150dc44fab1911775a49636d0ce85333b634Zonr Chang note(diag::note_has_no_symtab) << pInput.name() 216affc150dc44fab1911775a49636d0ce85333b634Zonr Chang << pInput.path() 217affc150dc44fab1911775a49636d0ce85333b634Zonr Chang << ".symtab"; 218affc150dc44fab1911775a49636d0ce85333b634Zonr Chang return true; 219affc150dc44fab1911775a49636d0ce85333b634Zonr Chang } 220affc150dc44fab1911775a49636d0ce85333b634Zonr Chang 2215460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao LDSection* strtab_shdr = symtab_shdr->getLink(); 222affc150dc44fab1911775a49636d0ce85333b634Zonr Chang if (NULL == strtab_shdr) { 223affc150dc44fab1911775a49636d0ce85333b634Zonr Chang fatal(diag::fatal_cannot_read_strtab) << pInput.name() 224affc150dc44fab1911775a49636d0ce85333b634Zonr Chang << pInput.path() 225affc150dc44fab1911775a49636d0ce85333b634Zonr Chang << ".symtab"; 2265460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao return false; 227affc150dc44fab1911775a49636d0ce85333b634Zonr Chang } 2285460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao 22967e37f1be98c926645219cfb47fab9e90d8c725cShih-wei Liao MemoryRegion* symtab_region = pInput.memArea()->request( 23067e37f1be98c926645219cfb47fab9e90d8c725cShih-wei Liao pInput.fileOffset() + symtab_shdr->offset(), symtab_shdr->size()); 23167e37f1be98c926645219cfb47fab9e90d8c725cShih-wei Liao MemoryRegion* strtab_region = pInput.memArea()->request( 23267e37f1be98c926645219cfb47fab9e90d8c725cShih-wei Liao pInput.fileOffset() + strtab_shdr->offset(), strtab_shdr->size()); 2335460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao char* strtab = reinterpret_cast<char*>(strtab_region->start()); 2345460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao bool result = m_pELFReader->readSymbols(pInput, 2355460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao m_Linker, 2365460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao *symtab_region, 2375460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao strtab); 2385460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao pInput.memArea()->release(symtab_region); 2395460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao pInput.memArea()->release(strtab_region); 2405460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao return result; 2415460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao} 2425460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao 2435460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liaobool ELFObjectReader::readRelocations(Input& pInput) 2445460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao{ 2455460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao assert(pInput.hasMemArea()); 2465460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao 2475460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao MemoryArea* mem = pInput.memArea(); 2485460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao LDContext::sect_iterator section, sectEnd = pInput.context()->sectEnd(); 2495460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao for (section = pInput.context()->sectBegin(); section != sectEnd; ++section) { 2505460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao // ignore the section if the LDSection* in input context is NULL 2515460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao if (NULL == *section) 2525460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao continue; 2535460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao 2545460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao if ((*section)->type() == llvm::ELF::SHT_RELA && 2555460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao (*section)->kind() == LDFileFormat::Relocation) { 25667e37f1be98c926645219cfb47fab9e90d8c725cShih-wei Liao MemoryRegion* region = mem->request( 25767e37f1be98c926645219cfb47fab9e90d8c725cShih-wei Liao pInput.fileOffset() + (*section)->offset(), (*section)->size()); 25867e37f1be98c926645219cfb47fab9e90d8c725cShih-wei Liao bool result = m_pELFReader->readRela(pInput, m_Linker, **section, 25967e37f1be98c926645219cfb47fab9e90d8c725cShih-wei Liao *region); 2605460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao mem->release(region); 2615460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao if (!result) 2625460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao return false; 2635460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao } 2645460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao else if ((*section)->type() == llvm::ELF::SHT_REL && 2655460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao (*section)->kind() == LDFileFormat::Relocation) { 26667e37f1be98c926645219cfb47fab9e90d8c725cShih-wei Liao MemoryRegion* region = mem->request( 26767e37f1be98c926645219cfb47fab9e90d8c725cShih-wei Liao pInput.fileOffset() + (*section)->offset(), (*section)->size()); 2685460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao bool result = m_pELFReader->readRel(pInput, m_Linker, **section, *region); 2695460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao mem->release(region); 2705460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao if (!result) 2715460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao return false; 2725460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao } 2735460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao } 2745460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao return true; 2755460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao} 2765460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao 277