-const Section*
-X86ELFTargetAsmInfo::SelectSectionForGlobal(const GlobalValue *GV) const {
- SectionKind::Kind Kind = SectionKindForGlobal(GV);
-
- if (const Function *F = dyn_cast<Function>(GV)) {
- switch (F->getLinkage()) {
- default: assert(0 && "Unknown linkage type!");
- case Function::InternalLinkage:
- case Function::DLLExportLinkage:
- case Function::ExternalLinkage:
- return getTextSection_();
- case Function::WeakLinkage:
- case Function::LinkOnceLinkage:
- std::string Name = UniqueSectionForGlobal(GV, Kind);
- unsigned Flags = SectionFlagsForGlobal(GV, Name.c_str());
- return getNamedSection(Name.c_str(), Flags);
- }
- } else if (const GlobalVariable *GVar = dyn_cast<GlobalVariable>(GV)) {
- if (GVar->isWeakForLinker()) {
- std::string Name = UniqueSectionForGlobal(GVar, Kind);
- unsigned Flags = SectionFlagsForGlobal(GVar, Name.c_str());
- return getNamedSection(Name.c_str(), Flags);
- } else {
- switch (Kind) {
- case SectionKind::Data:
- return getDataSection_();
- case SectionKind::BSS:
- // ELF targets usually have BSS sections
- return getBSSSection_();
- case SectionKind::ROData:
- return getReadOnlySection_();
- case SectionKind::RODataMergeStr:
- return MergeableStringSection(GVar);
- case SectionKind::RODataMergeConst:
- return MergeableConstSection(GVar);
- case SectionKind::ThreadData:
- // ELF targets usually support TLS stuff
- return getTLSDataSection_();
- case SectionKind::ThreadBSS:
- return getTLSBSSSection_();
- default:
- assert(0 && "Unsuported section kind for global");
- }
- }
- } else
- assert(0 && "Unsupported global");
-}
-
-const Section*
-X86ELFTargetAsmInfo::MergeableConstSection(const GlobalVariable *GV) const {
- const TargetData *TD = X86TM->getTargetData();
- Constant *C = cast<GlobalVariable>(GV)->getInitializer();
- const Type *Type = C->getType();
-
- // FIXME: string here is temporary, until stuff will fully land in.
- // We cannot use {Four,Eight,Sixteen}ByteConstantSection here, since it's
- // currently directly used by asmprinter.
- unsigned Size = TD->getABITypeSize(Type);
- if (Size == 4 || Size == 8 || Size == 16) {
- std::string Name = ".rodata.cst" + utostr(Size);
-
- return getNamedSection(Name.c_str(),
- SectionFlags::setEntitySize(SectionFlags::Mergeable,
- Size));
- }
-
- return getReadOnlySection_();
-}
-
-const Section*
-X86ELFTargetAsmInfo::MergeableStringSection(const GlobalVariable *GV) const {
- const TargetData *TD = X86TM->getTargetData();
- Constant *C = cast<GlobalVariable>(GV)->getInitializer();
- const ConstantArray *CVA = cast<ConstantArray>(C);
- const Type *Type = CVA->getType()->getElementType();
-
- unsigned Size = TD->getABITypeSize(Type);
- if (Size <= 16) {
- // We also need alignment here
- const TargetData *TD = X86TM->getTargetData();
- unsigned Align = TD->getPreferredAlignment(GV);
- if (Align < Size)
- Align = Size;
-
- std::string Name = getCStringSection() + utostr(Size) + '.' + utostr(Align);
- unsigned Flags = SectionFlags::setEntitySize(SectionFlags::Mergeable |
- SectionFlags::Strings,
- Size);
- return getNamedSection(Name.c_str(), Flags);
- }
-
- return getReadOnlySection_();
-}
-
-std::string X86ELFTargetAsmInfo::PrintSectionFlags(unsigned flags) const {
- std::string Flags = ",\"";
-
- if (!(flags & SectionFlags::Debug))
- Flags += 'a';
- if (flags & SectionFlags::Code)
- Flags += 'x';
- if (flags & SectionFlags::Writeable)
- Flags += 'w';
- if (flags & SectionFlags::Mergeable)
- Flags += 'M';
- if (flags & SectionFlags::Strings)
- Flags += 'S';
- if (flags & SectionFlags::TLS)
- Flags += 'T';
-
- Flags += "\"";
-
- // FIXME: There can be exceptions here
- if (flags & SectionFlags::BSS)
- Flags += ",@nobits";
- else
- Flags += ",@progbits";
-
- if (unsigned entitySize = SectionFlags::getEntitySize(flags))
- Flags += "," + utostr(entitySize);
-
- return Flags;
-}
-