diff options
Diffstat (limited to 'llvm/lib/MC/ELFObjectWriter.cpp')
| -rw-r--r-- | llvm/lib/MC/ELFObjectWriter.cpp | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/llvm/lib/MC/ELFObjectWriter.cpp b/llvm/lib/MC/ELFObjectWriter.cpp index 5724c5c..b8ef265 100644 --- a/llvm/lib/MC/ELFObjectWriter.cpp +++ b/llvm/lib/MC/ELFObjectWriter.cpp @@ -193,6 +193,8 @@ public: MCSectionELF *createRelocationSection(MCContext &Ctx, const MCSectionELF &Sec); + void createMemtagRelocs(MCAssembler &Asm); + void writeSectionHeader(const MCAsmLayout &Layout, const SectionIndexMapTy &SectionIndexMap, const SectionOffsetsTy &SectionOffsets); @@ -614,6 +616,23 @@ bool ELFWriter::isInSymtab(const MCAsmLayout &Layout, const MCSymbolELF &Symbol, return true; } +void ELFWriter::createMemtagRelocs(MCAssembler &Asm) { + MCSectionELF *MemtagRelocs = nullptr; + for (const MCSymbol &Sym : Asm.symbols()) { + const auto &SymE = cast<MCSymbolELF>(Sym); + if (!SymE.isMemtag()) + continue; + if (MemtagRelocs == nullptr) { + MemtagRelocs = OWriter.TargetObjectWriter->getMemtagRelocsSection(Asm.getContext()); + if (MemtagRelocs == nullptr) + report_fatal_error("Tagged globals are not available on this architecture."); + Asm.registerSection(*MemtagRelocs); + } + ELFRelocationEntry Rec(0, &SymE, ELF::R_AARCH64_NONE, 0, nullptr, 0); + OWriter.Relocations[MemtagRelocs].push_back(Rec); + } +} + void ELFWriter::computeSymbolTable( MCAssembler &Asm, const MCAsmLayout &Layout, const SectionIndexMapTy &SectionIndexMap, const RevGroupMapTy &RevGroupMap, @@ -1075,6 +1094,8 @@ uint64_t ELFWriter::writeObject(MCAssembler &Asm, const MCAsmLayout &Layout) { Ctx.getELFSection(".strtab", ELF::SHT_STRTAB, 0); StringTableIndex = addToSectionTable(StrtabSection); + createMemtagRelocs(Asm); + RevGroupMapTy RevGroupMap; SectionIndexMapTy SectionIndexMap; |