Move finalize to OutputSectionCommands. NFC.
This removes a mapping from OutputSection to OutputSectionCommand and
is another step in moving clearOutputSections earlier.
llvm-svn: 304821
diff --git a/lld/ELF/LinkerScript.cpp b/lld/ELF/LinkerScript.cpp
index 5a10e8c..40b84b5 100644
--- a/lld/ELF/LinkerScript.cpp
+++ b/lld/ELF/LinkerScript.cpp
@@ -1071,6 +1071,78 @@
llvm_unreachable("unsupported Size argument");
}
+static bool compareByFilePosition(InputSection *A, InputSection *B) {
+ // Synthetic doesn't have link order dependecy, stable_sort will keep it last
+ if (A->kind() == InputSectionBase::Synthetic ||
+ B->kind() == InputSectionBase::Synthetic)
+ return false;
+ InputSection *LA = A->getLinkOrderDep();
+ InputSection *LB = B->getLinkOrderDep();
+ OutputSection *AOut = LA->getParent();
+ OutputSection *BOut = LB->getParent();
+ if (AOut != BOut)
+ return AOut->SectionIndex < BOut->SectionIndex;
+ return LA->OutSecOff < LB->OutSecOff;
+}
+
+template <class ELFT> static void finalizeShtGroup(OutputSection *Sec) {
+ // sh_link field for SHT_GROUP sections should contain the section index of
+ // the symbol table.
+ Sec->Link = InX::SymTab->getParent()->SectionIndex;
+
+ // sh_info then contain index of an entry in symbol table section which
+ // provides signature of the section group.
+ elf::ObjectFile<ELFT> *Obj = Sec->Sections[0]->getFile<ELFT>();
+ assert(Config->Relocatable && Sec->Sections.size() == 1);
+ ArrayRef<SymbolBody *> Symbols = Obj->getSymbols();
+ Sec->Info = InX::SymTab->getSymbolIndex(Symbols[Sec->Sections[0]->Info - 1]);
+}
+
+template <class ELFT> void OutputSectionCommand::finalize() {
+ if ((Sec->Flags & SHF_LINK_ORDER) && !Sec->Sections.empty()) {
+ // Link order may be distributed across several InputSectionDescriptions
+ // but sort must consider them all at once.
+ std::vector<InputSection **> ScriptSections;
+ std::vector<InputSection *> Sections;
+ for (BaseCommand *Base : Commands)
+ if (auto *ISD = dyn_cast<InputSectionDescription>(Base))
+ for (InputSection *&IS : ISD->Sections) {
+ ScriptSections.push_back(&IS);
+ Sections.push_back(IS);
+ }
+ std::sort(Sections.begin(), Sections.end(), compareByFilePosition);
+ for (int I = 0, N = Sections.size(); I < N; ++I)
+ *ScriptSections[I] = Sections[I];
+
+ // We must preserve the link order dependency of sections with the
+ // SHF_LINK_ORDER flag. The dependency is indicated by the sh_link field. We
+ // need to translate the InputSection sh_link to the OutputSection sh_link,
+ // all InputSections in the OutputSection have the same dependency.
+ if (auto *D = Sec->Sections.front()->getLinkOrderDep())
+ Sec->Link = D->getParent()->SectionIndex;
+ }
+
+ uint32_t Type = Sec->Type;
+ if (Type == SHT_GROUP) {
+ finalizeShtGroup<ELFT>(Sec);
+ return;
+ }
+
+ if (!Config->CopyRelocs || (Type != SHT_RELA && Type != SHT_REL))
+ return;
+
+ InputSection *First = Sec->Sections[0];
+ if (isa<SyntheticSection>(First))
+ return;
+
+ Sec->Link = InX::SymTab->getParent()->SectionIndex;
+ // sh_info for SHT_REL[A] sections should contain the section header index of
+ // the section to which the relocation applies.
+ InputSectionBase *S = First->getRelocatedSection();
+ Sec->Info = S->getOutputSection()->SectionIndex;
+ Sec->Flags |= SHF_INFO_LINK;
+}
+
// Compress section contents if this section contains debug info.
template <class ELFT> void OutputSectionCommand::maybeCompress() {
typedef typename ELFT::Chdr Elf_Chdr;
@@ -1201,3 +1273,8 @@
template void OutputSectionCommand::maybeCompress<ELF32BE>();
template void OutputSectionCommand::maybeCompress<ELF64LE>();
template void OutputSectionCommand::maybeCompress<ELF64BE>();
+
+template void OutputSectionCommand::finalize<ELF32LE>();
+template void OutputSectionCommand::finalize<ELF32BE>();
+template void OutputSectionCommand::finalize<ELF64LE>();
+template void OutputSectionCommand::finalize<ELF64BE>();