class MCAssembler;
class MCFragment;
class MCSectionData;
+class MCSymbol;
class MCSymbolData;
/// Encapsulates the layout of an assembly file at a particular point in time.
/// \brief Variant that reports a fatal error if the offset is not computable.
uint64_t getSymbolOffset(const MCSymbolData *SD) const;
+ /// \brief If this symbol is equivalent to A + Constant, return A.
+ const MCSymbol *getBaseSymbol(const MCSymbol &Symbol) const;
+
/// @}
};
return Type;
}
-static const MCSymbol *getBaseSymbol(const MCAsmLayout &Layout,
- const MCSymbol &Symbol) {
- if (!Symbol.isVariable())
- return &Symbol;
-
- const MCExpr *Expr = Symbol.getVariableValue();
- MCValue Value;
- if (!Expr->EvaluateAsValue(Value, &Layout))
- llvm_unreachable("Invalid Expression");
-
- const MCSymbolRefExpr *RefB = Value.getSymB();
- if (RefB)
- Layout.getAssembler().getContext().FatalError(
- SMLoc(), Twine("symbol '") + RefB->getSymbol().getName() +
- "' could not be evaluated in a subtraction expression");
-
- const MCSymbolRefExpr *A = Value.getSymA();
- if (!A)
- return nullptr;
-
- return &A->getSymbol();
-}
-
void ELFObjectWriter::WriteSymbol(SymbolTableWriter &Writer, ELFSymbolData &MSD,
const MCAsmLayout &Layout) {
MCSymbolData &OrigData = *MSD.SymbolData;
(&OrigData.getFragment()->getParent()->getSection() ==
&OrigData.getSymbol().getSection())) &&
"The symbol's section doesn't match the fragment's symbol");
- const MCSymbol *Base = getBaseSymbol(Layout, OrigData.getSymbol());
+ const MCSymbol *Base = Layout.getBaseSymbol(OrigData.getSymbol());
// This has to be in sync with when computeSymbolTable uses SHN_ABS or
// SHN_COMMON.
return true;
if (Symbol.isVariable()) {
- const MCSymbol *Base = getBaseSymbol(Layout, Symbol);
+ const MCSymbol *Base = Layout.getBaseSymbol(Symbol);
if (Base && Base->isUndefined())
return false;
}
ELFSymbolData MSD;
MSD.SymbolData = &SD;
- const MCSymbol *BaseSymbol = getBaseSymbol(Layout, Symbol);
+ const MCSymbol *BaseSymbol = Layout.getBaseSymbol(Symbol);
// Undefined symbols are global, but this is the first place we
// are able to set it.
return Val;
}
+const MCSymbol *MCAsmLayout::getBaseSymbol(const MCSymbol &Symbol) const {
+ if (!Symbol.isVariable())
+ return &Symbol;
+
+ const MCExpr *Expr = Symbol.getVariableValue();
+ MCValue Value;
+ if (!Expr->EvaluateAsValue(Value, this))
+ llvm_unreachable("Invalid Expression");
+
+ const MCSymbolRefExpr *RefB = Value.getSymB();
+ if (RefB)
+ Assembler.getContext().FatalError(
+ SMLoc(), Twine("symbol '") + RefB->getSymbol().getName() +
+ "' could not be evaluated in a subtraction expression");
+
+ const MCSymbolRefExpr *A = Value.getSymA();
+ if (!A)
+ return nullptr;
+
+ return &A->getSymbol();
+}
+
uint64_t MCAsmLayout::getSectionAddressSize(const MCSectionData *SD) const {
// The size is the last fragment's end offset.
const MCFragment &F = SD->getFragmentList().back();