1 //===- Core/AbsoluteAtom.h - An absolute Atom -----------------------------===// 2 // 3 // The LLVM Linker 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 #ifndef LLD_CORE_ABSOLUTE_ATOM_H 11 #define LLD_CORE_ABSOLUTE_ATOM_H 12 13 #include "lld/Core/Atom.h" 14 15 namespace lld { 16 17 /// An AbsoluteAtom has no content. 18 /// It exists to represent content at fixed addresses in memory. 19 class AbsoluteAtom : public Atom { 20 public: 21 22 virtual uint64_t value() const = 0; 23 24 /// scope - The visibility of this atom to other atoms. C static functions 25 /// have scope scopeTranslationUnit. Regular C functions have scope 26 /// scopeGlobal. Functions compiled with visibility=hidden have scope 27 /// scopeLinkageUnit so they can be see by other atoms being linked but not 28 /// by the OS loader. 29 virtual Scope scope() const = 0; 30 31 static bool classof(const Atom *a) { 32 return a->definition() == definitionAbsolute; 33 } 34 35 static bool classof(const AbsoluteAtom *) { return true; } 36 37 protected: 38 AbsoluteAtom() : Atom(definitionAbsolute) {} 39 }; 40 41 } // namespace lld 42 43 #endif // LLD_CORE_ABSOLUTE_ATOM_H 44
