class ELFObjectWriter : public MCObjectWriter {
static bool isFixupKindPCRel(const MCAssembler &Asm, unsigned Kind);
- static bool RelocNeedsGOT(MCSymbolRefExpr::VariantKind Variant);
static uint64_t SymbolValue(const MCSymbol &Sym, const MCAsmLayout &Layout);
static bool isInSymtab(const MCAsmLayout &Layout, const MCSymbol &Symbol,
bool Used, bool Renamed);
/// @}
- bool NeedsGOT;
-
// This holds the symbol table index of the last local symbol.
unsigned LastLocalSymbolIndex;
// This holds the .strtab section index.
public:
ELFObjectWriter(MCELFObjectTargetWriter *MOTW, raw_pwrite_stream &OS,
bool IsLittleEndian)
- : MCObjectWriter(OS, IsLittleEndian), TargetObjectWriter(MOTW),
- NeedsGOT(false) {}
+ : MCObjectWriter(OS, IsLittleEndian), TargetObjectWriter(MOTW) {}
void reset() override {
UsedInReloc.clear();
LocalSymbolData.clear();
ExternalSymbolData.clear();
UndefinedSymbolData.clear();
- NeedsGOT = false;
SectionTable.clear();
MCObjectWriter::reset();
}
return FKI.Flags & MCFixupKindInfo::FKF_IsPCRel;
}
-bool ELFObjectWriter::RelocNeedsGOT(MCSymbolRefExpr::VariantKind Variant) {
- switch (Variant) {
- default:
- return false;
- case MCSymbolRefExpr::VK_GOT:
- case MCSymbolRefExpr::VK_PLT:
- case MCSymbolRefExpr::VK_GOTPCREL:
- case MCSymbolRefExpr::VK_GOTOFF:
- case MCSymbolRefExpr::VK_TPOFF:
- case MCSymbolRefExpr::VK_TLSGD:
- case MCSymbolRefExpr::VK_GOTTPOFF:
- case MCSymbolRefExpr::VK_INDNTPOFF:
- case MCSymbolRefExpr::VK_NTPOFF:
- case MCSymbolRefExpr::VK_GOTNTPOFF:
- case MCSymbolRefExpr::VK_TLSLDM:
- case MCSymbolRefExpr::VK_DTPOFF:
- case MCSymbolRefExpr::VK_TLSLD:
- return true;
- }
-}
-
ELFObjectWriter::~ELFObjectWriter()
{}
FixedValue = C;
- // FIXME: What is this!?!?
- MCSymbolRefExpr::VariantKind Modifier =
- RefA ? RefA->getKind() : MCSymbolRefExpr::VK_None;
- if (RelocNeedsGOT(Modifier))
- NeedsGOT = true;
-
if (!RelocateWithSymbol) {
const MCSection *SecA =
(SymA && !SymA->isUndefined()) ? &SymA->getSection() : nullptr;
SymtabSection->setAlignment(is64Bit() ? 8 : 4);
SymbolTableIndex = addToSectionTable(SymtabSection);
- // FIXME: Is this the correct place to do this?
- // FIXME: Why is an undefined reference to _GLOBAL_OFFSET_TABLE_ needed?
- if (NeedsGOT) {
- StringRef Name = "_GLOBAL_OFFSET_TABLE_";
- MCSymbol *Sym = Asm.getContext().getOrCreateSymbol(Name);
- MCSymbolData &Data = Asm.getOrCreateSymbolData(*Sym);
- Data.setExternal(true);
- MCELF::SetBinding(Data, ELF::STB_GLOBAL);
- }
-
// Add the data for the symbols.
bool HasLargeSectionIndex = false;
for (const MCSymbol &Symbol : Asm.symbols()) {