static void readSymbolTableEntries(Archive& pArchive, MemoryRegion& pMemRegion)
{
typedef typename SizeTraits<SIZE>::Offset Offset;
const Offset* data = reinterpret_cast<const Offset*>(pMemRegion.getBuffer());
// read the number of symbols
Offset number = 0;
if (llvm::sys::IsLittleEndianHost)
number = mcld::bswap<SIZE>(*data);
else
number = *data;
// set up the pointers for file offset and name offset
++data;
const char* name = reinterpret_cast<const char*>(data + number);
// add the archive symbols
for (Offset i = 0; i < number; ++i) {
if (llvm::sys::IsLittleEndianHost)
pArchive.addSymbol(name, mcld::bswap<SIZE>(*data));
else
pArchive.addSymbol(name, *data);
name += strlen(name) + 1;
++data;
}
}
uint64_t Mips64GOT::emit(MemoryRegion& pRegion)
{
uint64_t* buffer = reinterpret_cast<uint64_t*>(pRegion.getBuffer());
uint64_t result = 0;
for (iterator it = begin(), ie = end(); it != ie; ++it, ++buffer) {
Mips64GOTEntry* got = &(llvm::cast<Mips64GOTEntry>((*it)));
*buffer = static_cast<uint64_t>(got->getValue());
result += got->size();
}
return result;
}
uint64_t X86GNULDBackend::emitSectionData(const LDSection& pSection,
MemoryRegion& pRegion) const
{
assert(pRegion.size() && "Size of MemoryRegion is zero!");
const ELFFileFormat* FileFormat = getOutputFormat();
assert(FileFormat &&
"ELFFileFormat is NULL in X86GNULDBackend::emitSectionData!");
unsigned int EntrySize = 0;
uint64_t RegionSize = 0;
if (&pSection == &(FileFormat->getPLT())) {
assert(m_pPLT && "emitSectionData failed, m_pPLT is NULL!");
unsigned char* buffer = pRegion.getBuffer();
m_pPLT->applyPLT0();
m_pPLT->applyPLT1();
X86PLT::iterator it = m_pPLT->begin();
unsigned int plt0_size = llvm::cast<PLTEntryBase>((*it)).size();
memcpy(buffer, llvm::cast<PLTEntryBase>((*it)).getValue(), plt0_size);
RegionSize += plt0_size;
++it;
PLTEntryBase* plt1 = 0;
X86PLT::iterator ie = m_pPLT->end();
while (it != ie) {
plt1 = &(llvm::cast<PLTEntryBase>(*it));
EntrySize = plt1->size();
memcpy(buffer + RegionSize, plt1->getValue(), EntrySize);
RegionSize += EntrySize;
++it;
}
}
else if (&pSection == &(FileFormat->getGOT())) {
RegionSize += emitGOTSectionData(pRegion);
}
else if (&pSection == &(FileFormat->getGOTPLT())) {
RegionSize += emitGOTPLTSectionData(pRegion, FileFormat);
}
else {
fatal(diag::unrecognized_output_sectoin)
<< pSection.name()
<< "*****@*****.**";
}
return RegionSize;
}
uint64_t ARMGOT::emit(MemoryRegion& pRegion)
{
uint32_t* buffer = reinterpret_cast<uint32_t*>(pRegion.getBuffer());
ARMGOTEntry* got = NULL;
uint64_t result = 0x0;
for (iterator it = begin(), ie = end(); it != ie; ++it, ++buffer) {
got = &(llvm::cast<ARMGOTEntry>((*it)));
*buffer = static_cast<uint32_t>(got->getValue());
result += ARMGOTEntry::EntrySize;
}
return result;
}
uint64_t ARMGOT::emit(MemoryRegion& pRegion)
{
uint32_t* buffer = reinterpret_cast<uint32_t*>(pRegion.getBuffer());
GOTEntry* got = 0;
unsigned int entry_size = getEntrySize();
uint64_t result = 0x0;
for (iterator it = begin(), ie = end();
it != ie; ++it, ++buffer) {
got = &(llvm::cast<GOTEntry>((*it)));
*buffer = static_cast<uint32_t>(got->getContent());
result += entry_size;
}
return result;
}
/// isThinArchive
bool GNUArchiveReader::isThinArchive(Input& pInput) const
{
assert(pInput.hasMemArea());
MemoryRegion* region = pInput.memArea()->request(pInput.fileOffset(),
Archive::MAGIC_LEN);
const char* str = reinterpret_cast<const char*>(region->getBuffer());
bool result = false;
assert(NULL != str);
if (isThinArchive(str))
result = true;
pInput.memArea()->release(region);
return result;
}
uint64_t X86_64GNULDBackend::emitGOTSectionData(MemoryRegion& pRegion) const
{
assert(m_pGOT && "emitGOTSectionData failed, m_pGOT is NULL!");
uint64_t* buffer = reinterpret_cast<uint64_t*>(pRegion.getBuffer());
X86_64GOTEntry* got = 0;
unsigned int EntrySize = X86_64GOTEntry::EntrySize;
uint64_t RegionSize = 0;
for (X86_64GOT::iterator it = m_pGOT->begin(),
ie = m_pGOT->end(); it != ie; ++it, ++buffer) {
got = &(llvm::cast<X86_64GOTEntry>((*it)));
*buffer = static_cast<uint64_t>(got->getValue());
RegionSize += EntrySize;
}
return RegionSize;
}
size_t ELFAttribute::emit(MemoryRegion &pRegion) const
{
// ARM [ABI-addenda], 2.2.3
uint64_t total_size = 0;
// Write format-version.
char* buffer = reinterpret_cast<char*>(pRegion.getBuffer());
buffer[0] = FormatVersion;
total_size += FormatVersionFieldSize;
for (llvm::SmallVectorImpl<Subsection*>::const_iterator
subsec_it = m_Subsections.begin(), subsec_end = m_Subsections.end();
subsec_it != subsec_end; ++subsec_it) {
// Write out subsection.
total_size += (*subsec_it)->emit(buffer + total_size);
}
return total_size;
}
uint64_t X86_64GNULDBackend::emitGOTPLTSectionData(MemoryRegion& pRegion,
const ELFFileFormat* FileFormat) const
{
assert(m_pGOTPLT && "emitGOTPLTSectionData failed, m_pGOTPLT is NULL!");
m_pGOTPLT->applyGOT0(FileFormat->getDynamic().addr());
m_pGOTPLT->applyAllGOTPLT(*m_pPLT);
uint64_t* buffer = reinterpret_cast<uint64_t*>(pRegion.getBuffer());
X86_64GOTEntry* got = 0;
unsigned int EntrySize = X86_64GOTEntry::EntrySize;
uint64_t RegionSize = 0;
for (X86_64GOTPLT::iterator it = m_pGOTPLT->begin(),
ie = m_pGOTPLT->end(); it != ie; ++it, ++buffer) {
got = &(llvm::cast<X86_64GOTEntry>((*it)));
*buffer = static_cast<uint64_t>(got->getValue());
RegionSize += EntrySize;
}
return RegionSize;
}
bool ScriptReader::readScript(const LinkerConfig& pConfig,
ScriptFile& pScriptFile)
{
bool result = false;
std::stringbuf buf;
Input& input = pScriptFile.input();
size_t size = input.memArea()->size();
MemoryRegion* region = input.memArea()->request(input.fileOffset(), size);
char* str = reinterpret_cast<char*>(region->getBuffer());
buf.pubsetbuf(str, size);
std::istream in(&buf);
ScriptScanner scanner(&in);
ScriptParser parser(pConfig,
pScriptFile,
scanner,
m_GroupReader);
result = (0 == parser.parse());;
input.memArea()->release(region);
return result;
}
/// emitSectionData
void ELFObjectWriter::emitSectionData(const SectionData& pSD,
MemoryRegion& pRegion) const
{
SectionData::const_iterator fragIter, fragEnd = pSD.end();
size_t cur_offset = 0;
for (fragIter = pSD.begin(); fragIter != fragEnd; ++fragIter) {
size_t size = fragIter->size();
switch(fragIter->getKind()) {
case Fragment::Region: {
const RegionFragment& region_frag = llvm::cast<RegionFragment>(*fragIter);
const uint8_t* from = region_frag.getRegion().start();
memcpy(pRegion.getBuffer(cur_offset), from, size);
break;
}
case Fragment::Alignment: {
// TODO: emit values with different sizes (> 1 byte), and emit nops
const AlignFragment& align_frag = llvm::cast<AlignFragment>(*fragIter);
uint64_t count = size / align_frag.getValueSize();
switch (align_frag.getValueSize()) {
case 1u:
std::memset(pRegion.getBuffer(cur_offset),
align_frag.getValue(),
count);
break;
default:
llvm::report_fatal_error("unsupported value size for align fragment emission yet.\n");
break;
}
break;
}
case Fragment::Fillment: {
const FillFragment& fill_frag = llvm::cast<FillFragment>(*fragIter);
if (0 == size ||
0 == fill_frag.getValueSize() ||
0 == fill_frag.size()) {
// ignore virtual fillment
break;
}
uint64_t num_tiles = fill_frag.size() / fill_frag.getValueSize();
for (uint64_t i = 0; i != num_tiles; ++i) {
std::memset(pRegion.getBuffer(cur_offset),
fill_frag.getValue(),
fill_frag.getValueSize());
}
break;
}
case Fragment::Stub: {
const Stub& stub_frag = llvm::cast<Stub>(*fragIter);
memcpy(pRegion.getBuffer(cur_offset), stub_frag.getContent(), size);
break;
}
case Fragment::Null: {
assert(0x0 == size);
break;
}
case Fragment::Target:
llvm::report_fatal_error("Target fragment should not be in a regular section.\n");
break;
default:
llvm::report_fatal_error("invalid fragment should not be in a regular section.\n");
break;
}
cur_offset += size;
}
}
