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|
//===- ELFDynamic.cpp ------------- ------------------------------------===//
//
// The MCLinker Project
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "mcld/LD/ELFFileFormat.h"
#include "mcld/Support/MsgHandling.h"
#include "mcld/Target/ELFDynamic.h"
#include "mcld/Target/GNULDBackend.h"
#include "mcld/LinkerConfig.h"
#include <llvm/Support/ErrorHandling.h>
#include <llvm/Support/Host.h>
namespace mcld {
namespace elf_dynamic {
//===----------------------------------------------------------------------===//
// elf_dynamic::EntryIF
//===----------------------------------------------------------------------===//
EntryIF::EntryIF() {
}
EntryIF::~EntryIF() {
}
} // namespace elf_dynamic
//===----------------------------------------------------------------------===//
// ELFDynamic
//===----------------------------------------------------------------------===//
ELFDynamic::ELFDynamic(const GNULDBackend& pParent, const LinkerConfig& pConfig)
: m_pEntryFactory(NULL), m_Backend(pParent), m_Config(pConfig), m_Idx(0) {
// FIXME: support big-endian machine.
if (m_Config.targets().is32Bits()) {
if (m_Config.targets().isLittleEndian())
m_pEntryFactory = new elf_dynamic::Entry<32, true>();
} else if (m_Config.targets().is64Bits()) {
if (m_Config.targets().isLittleEndian())
m_pEntryFactory = new elf_dynamic::Entry<64, true>();
} else {
fatal(diag::unsupported_bitclass) << m_Config.targets().triple().str()
<< m_Config.targets().bitclass();
}
}
ELFDynamic::~ELFDynamic() {
if (m_pEntryFactory != NULL)
delete m_pEntryFactory;
EntryListType::iterator entry, entryEnd = m_EntryList.end();
for (entry = m_EntryList.begin(); entry != entryEnd; ++entry) {
if (*entry != NULL)
delete (*entry);
}
entryEnd = m_NeedList.end();
for (entry = m_NeedList.begin(); entry != entryEnd; ++entry) {
if (*entry != NULL)
delete (*entry);
}
}
size_t ELFDynamic::size() const {
return (m_NeedList.size() + m_EntryList.size());
}
size_t ELFDynamic::numOfBytes() const {
return size() * entrySize();
}
size_t ELFDynamic::entrySize() const {
return m_pEntryFactory->size();
}
void ELFDynamic::reserveOne(uint64_t pTag) {
assert(m_pEntryFactory != NULL);
m_EntryList.push_back(m_pEntryFactory->clone());
}
void ELFDynamic::applyOne(uint64_t pTag, uint64_t pValue) {
assert(m_Idx < m_EntryList.size());
m_EntryList[m_Idx]->setValue(pTag, pValue);
++m_Idx;
}
/// reserveEntries - reserve entries
void ELFDynamic::reserveEntries(const ELFFileFormat& pFormat) {
if (LinkerConfig::DynObj == m_Config.codeGenType()) {
reserveOne(llvm::ELF::DT_SONAME);
if (m_Config.options().Bsymbolic())
reserveOne(llvm::ELF::DT_SYMBOLIC);
}
if (pFormat.hasInit())
reserveOne(llvm::ELF::DT_INIT);
if (pFormat.hasFini())
reserveOne(llvm::ELF::DT_FINI);
if (pFormat.hasPreInitArray()) {
reserveOne(llvm::ELF::DT_PREINIT_ARRAY);
reserveOne(llvm::ELF::DT_PREINIT_ARRAYSZ);
}
if (pFormat.hasInitArray()) {
reserveOne(llvm::ELF::DT_INIT_ARRAY);
reserveOne(llvm::ELF::DT_INIT_ARRAYSZ);
}
if (pFormat.hasFiniArray()) {
reserveOne(llvm::ELF::DT_FINI_ARRAY);
reserveOne(llvm::ELF::DT_FINI_ARRAYSZ);
}
if (pFormat.hasHashTab())
reserveOne(llvm::ELF::DT_HASH);
if (pFormat.hasGNUHashTab())
reserveOne(llvm::ELF::DT_GNU_HASH);
if (pFormat.hasDynSymTab()) {
reserveOne(llvm::ELF::DT_SYMTAB);
reserveOne(llvm::ELF::DT_SYMENT);
}
if (pFormat.hasDynStrTab()) {
reserveOne(llvm::ELF::DT_STRTAB);
reserveOne(llvm::ELF::DT_STRSZ);
}
reserveTargetEntries(pFormat);
if (pFormat.hasRelPlt() || pFormat.hasRelaPlt()) {
reserveOne(llvm::ELF::DT_PLTREL);
reserveOne(llvm::ELF::DT_JMPREL);
reserveOne(llvm::ELF::DT_PLTRELSZ);
}
if (pFormat.hasRelDyn()) {
reserveOne(llvm::ELF::DT_REL);
reserveOne(llvm::ELF::DT_RELSZ);
reserveOne(llvm::ELF::DT_RELENT);
}
if (pFormat.hasRelaDyn()) {
reserveOne(llvm::ELF::DT_RELA);
reserveOne(llvm::ELF::DT_RELASZ);
reserveOne(llvm::ELF::DT_RELAENT);
}
uint64_t dt_flags = 0x0;
if (m_Config.options().hasOrigin())
dt_flags |= llvm::ELF::DF_ORIGIN;
if (m_Config.options().Bsymbolic())
dt_flags |= llvm::ELF::DF_SYMBOLIC;
if (m_Config.options().hasNow())
dt_flags |= llvm::ELF::DF_BIND_NOW;
if (m_Backend.hasTextRel())
dt_flags |= llvm::ELF::DF_TEXTREL;
if (m_Backend.hasStaticTLS() &&
(LinkerConfig::DynObj == m_Config.codeGenType()))
dt_flags |= llvm::ELF::DF_STATIC_TLS;
if ((m_Config.options().hasNewDTags() && dt_flags != 0x0) ||
(dt_flags & llvm::ELF::DF_STATIC_TLS) != 0x0)
reserveOne(llvm::ELF::DT_FLAGS);
if (m_Backend.hasTextRel())
reserveOne(llvm::ELF::DT_TEXTREL);
if (m_Config.options().hasNow() || m_Config.options().hasLoadFltr() ||
m_Config.options().hasOrigin() || m_Config.options().hasInterPose() ||
m_Config.options().hasNoDefaultLib() || m_Config.options().hasNoDump() ||
m_Config.options().Bgroup() ||
((LinkerConfig::DynObj == m_Config.codeGenType()) &&
(m_Config.options().hasNoDelete() || m_Config.options().hasInitFirst() ||
m_Config.options().hasNoDLOpen()))) {
reserveOne(llvm::ELF::DT_FLAGS_1);
}
unsigned num_spare_dtags = m_Config.options().getNumSpareDTags();
for (unsigned i = 0; i < num_spare_dtags; ++i) {
reserveOne(llvm::ELF::DT_NULL);
}
}
/// applyEntries - apply entries
void ELFDynamic::applyEntries(const ELFFileFormat& pFormat) {
if (LinkerConfig::DynObj == m_Config.codeGenType() &&
m_Config.options().Bsymbolic()) {
applyOne(llvm::ELF::DT_SYMBOLIC, 0x0);
}
if (pFormat.hasInit())
applyOne(llvm::ELF::DT_INIT, pFormat.getInit().addr());
if (pFormat.hasFini())
applyOne(llvm::ELF::DT_FINI, pFormat.getFini().addr());
if (pFormat.hasPreInitArray()) {
applyOne(llvm::ELF::DT_PREINIT_ARRAY, pFormat.getPreInitArray().addr());
applyOne(llvm::ELF::DT_PREINIT_ARRAYSZ, pFormat.getPreInitArray().size());
}
if (pFormat.hasInitArray()) {
applyOne(llvm::ELF::DT_INIT_ARRAY, pFormat.getInitArray().addr());
applyOne(llvm::ELF::DT_INIT_ARRAYSZ, pFormat.getInitArray().size());
}
if (pFormat.hasFiniArray()) {
applyOne(llvm::ELF::DT_FINI_ARRAY, pFormat.getFiniArray().addr());
applyOne(llvm::ELF::DT_FINI_ARRAYSZ, pFormat.getFiniArray().size());
}
if (pFormat.hasHashTab())
applyOne(llvm::ELF::DT_HASH, pFormat.getHashTab().addr());
if (pFormat.hasGNUHashTab())
applyOne(llvm::ELF::DT_GNU_HASH, pFormat.getGNUHashTab().addr());
if (pFormat.hasDynSymTab()) {
applyOne(llvm::ELF::DT_SYMTAB, pFormat.getDynSymTab().addr());
applyOne(llvm::ELF::DT_SYMENT, symbolSize());
}
if (pFormat.hasDynStrTab()) {
applyOne(llvm::ELF::DT_STRTAB, pFormat.getDynStrTab().addr());
applyOne(llvm::ELF::DT_STRSZ, pFormat.getDynStrTab().size());
}
applyTargetEntries(pFormat);
if (pFormat.hasRelPlt()) {
applyOne(llvm::ELF::DT_PLTREL, llvm::ELF::DT_REL);
applyOne(llvm::ELF::DT_JMPREL, pFormat.getRelPlt().addr());
applyOne(llvm::ELF::DT_PLTRELSZ, pFormat.getRelPlt().size());
} else if (pFormat.hasRelaPlt()) {
applyOne(llvm::ELF::DT_PLTREL, llvm::ELF::DT_RELA);
applyOne(llvm::ELF::DT_JMPREL, pFormat.getRelaPlt().addr());
applyOne(llvm::ELF::DT_PLTRELSZ, pFormat.getRelaPlt().size());
}
if (pFormat.hasRelDyn()) {
applyOne(llvm::ELF::DT_REL, pFormat.getRelDyn().addr());
applyOne(llvm::ELF::DT_RELSZ, pFormat.getRelDyn().size());
applyOne(llvm::ELF::DT_RELENT, m_pEntryFactory->relSize());
}
if (pFormat.hasRelaDyn()) {
applyOne(llvm::ELF::DT_RELA, pFormat.getRelaDyn().addr());
applyOne(llvm::ELF::DT_RELASZ, pFormat.getRelaDyn().size());
applyOne(llvm::ELF::DT_RELAENT, m_pEntryFactory->relaSize());
}
if (m_Backend.hasTextRel()) {
applyOne(llvm::ELF::DT_TEXTREL, 0x0);
if (m_Config.options().warnSharedTextrel() &&
LinkerConfig::DynObj == m_Config.codeGenType())
mcld::warning(mcld::diag::warn_shared_textrel);
}
uint64_t dt_flags = 0x0;
if (m_Config.options().hasOrigin())
dt_flags |= llvm::ELF::DF_ORIGIN;
if (m_Config.options().Bsymbolic())
dt_flags |= llvm::ELF::DF_SYMBOLIC;
if (m_Config.options().hasNow())
dt_flags |= llvm::ELF::DF_BIND_NOW;
if (m_Backend.hasTextRel())
dt_flags |= llvm::ELF::DF_TEXTREL;
if (m_Backend.hasStaticTLS() &&
(LinkerConfig::DynObj == m_Config.codeGenType()))
dt_flags |= llvm::ELF::DF_STATIC_TLS;
if ((m_Config.options().hasNewDTags() && dt_flags != 0x0) ||
(dt_flags & llvm::ELF::DF_STATIC_TLS) != 0)
applyOne(llvm::ELF::DT_FLAGS, dt_flags);
uint64_t dt_flags_1 = 0x0;
if (m_Config.options().hasNow())
dt_flags_1 |= llvm::ELF::DF_1_NOW;
if (m_Config.options().hasLoadFltr())
dt_flags_1 |= llvm::ELF::DF_1_LOADFLTR;
if (m_Config.options().hasOrigin())
dt_flags_1 |= llvm::ELF::DF_1_ORIGIN;
if (m_Config.options().hasInterPose())
dt_flags_1 |= llvm::ELF::DF_1_INTERPOSE;
if (m_Config.options().hasNoDefaultLib())
dt_flags_1 |= llvm::ELF::DF_1_NODEFLIB;
if (m_Config.options().hasNoDump())
dt_flags_1 |= llvm::ELF::DF_1_NODUMP;
if (m_Config.options().Bgroup())
dt_flags_1 |= llvm::ELF::DF_1_GROUP;
if (LinkerConfig::DynObj == m_Config.codeGenType()) {
if (m_Config.options().hasNoDelete())
dt_flags_1 |= llvm::ELF::DF_1_NODELETE;
if (m_Config.options().hasInitFirst())
dt_flags_1 |= llvm::ELF::DF_1_INITFIRST;
if (m_Config.options().hasNoDLOpen())
dt_flags_1 |= llvm::ELF::DF_1_NOOPEN;
}
if (dt_flags_1 != 0x0)
applyOne(llvm::ELF::DT_FLAGS_1, dt_flags_1);
unsigned num_spare_dtags = m_Config.options().getNumSpareDTags();
for (unsigned i = 0; i < num_spare_dtags; ++i) {
applyOne(llvm::ELF::DT_NULL, 0x0);
}
}
/// symbolSize
size_t ELFDynamic::symbolSize() const {
return m_pEntryFactory->symbolSize();
}
/// reserveNeedEntry - reserve on DT_NEED entry.
void ELFDynamic::reserveNeedEntry() {
m_NeedList.push_back(m_pEntryFactory->clone());
}
/// emit
void ELFDynamic::emit(const LDSection& pSection, MemoryRegion& pRegion) const {
if (pRegion.size() < pSection.size()) {
llvm::report_fatal_error(llvm::Twine("the given memory is smaller") +
llvm::Twine(" than the section's demaind.\n"));
}
uint8_t* address = reinterpret_cast<uint8_t*>(pRegion.begin());
EntryListType::const_iterator entry, entryEnd = m_NeedList.end();
for (entry = m_NeedList.begin(); entry != entryEnd; ++entry)
address += (*entry)->emit(address);
entryEnd = m_EntryList.end();
for (entry = m_EntryList.begin(); entry != entryEnd; ++entry)
address += (*entry)->emit(address);
}
void ELFDynamic::applySoname(uint64_t pStrTabIdx) {
applyOne(llvm::ELF::DT_SONAME, pStrTabIdx);
}
} // namespace mcld
|
