void MCWinCOFFStreamer::EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
unsigned ByteAlignment) {
assert((!Symbol->isInSection() ||
Symbol->getSection().getVariant() == MCSection::SV_COFF) &&
"Got non-COFF section in the COFF backend!");
const Triple &T = getContext().getObjectFileInfo()->getTargetTriple();
if (T.isKnownWindowsMSVCEnvironment()) {
if (ByteAlignment > 32)
report_fatal_error("alignment is limited to 32-bytes");
// Round size up to alignment so that we will honor the alignment request.
Size = std::max(Size, static_cast<uint64_t>(ByteAlignment));
}
AssignSection(Symbol, nullptr);
getAssembler().registerSymbol(*Symbol);
Symbol->setExternal(true);
Symbol->setCommon(Size, ByteAlignment);
if (!T.isKnownWindowsMSVCEnvironment() && ByteAlignment > 1) {
SmallString<128> Directive;
raw_svector_ostream OS(Directive);
const MCObjectFileInfo *MFI = getContext().getObjectFileInfo();
OS << " -aligncomm:\"" << Symbol->getName() << "\","
<< Log2_32_Ceil(ByteAlignment);
PushSection();
SwitchSection(MFI->getDrectveSection());
EmitBytes(Directive);
PopSection();
}
}
void MCWinCOFFStreamer::EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size,
unsigned ByteAlignment) {
assert(!Symbol->isInSection() && "Symbol must not already have a section!");
MCSection *Section = getContext().getObjectFileInfo()->getBSSSection();
MCSectionData &SectionData = getAssembler().getOrCreateSectionData(*Section);
if (Section->getAlignment() < ByteAlignment)
Section->setAlignment(ByteAlignment);
MCSymbolData &SD = getAssembler().getOrCreateSymbolData(*Symbol);
SD.setExternal(false);
AssignSection(Symbol, Section);
if (ByteAlignment != 1)
new MCAlignFragment(ByteAlignment, /*Value=*/0, /*ValueSize=*/0,
ByteAlignment, &SectionData);
MCFillFragment *Fragment =
new MCFillFragment(/*Value=*/0, /*ValueSize=*/0, Size, &SectionData);
SD.setFragment(Fragment);
}
