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| 1 //===- subzero/src/IceFixups.h - Assembler fixup kinds ----------*- C++ -*-===// | 1 //===- subzero/src/IceFixups.h - Assembler fixup kinds ----------*- C++ -*-===// |
| 2 // | 2 // |
| 3 // The Subzero Code Generator | 3 // The Subzero Code Generator |
| 4 // | 4 // |
| 5 // This file is distributed under the University of Illinois Open Source | 5 // This file is distributed under the University of Illinois Open Source |
| 6 // License. See LICENSE.TXT for details. | 6 // License. See LICENSE.TXT for details. |
| 7 // | 7 // |
| 8 //===----------------------------------------------------------------------===// | 8 //===----------------------------------------------------------------------===// |
| 9 /// | 9 /// |
| 10 /// \file | 10 /// \file |
| 11 /// This file declares generic fixup types. | 11 /// This file declares generic fixup types. |
| 12 /// | 12 /// |
| 13 //===----------------------------------------------------------------------===// | 13 //===----------------------------------------------------------------------===// |
| 14 | 14 |
| 15 #ifndef SUBZERO_SRC_ICEFIXUPS_H | 15 #ifndef SUBZERO_SRC_ICEFIXUPS_H |
| 16 #define SUBZERO_SRC_ICEFIXUPS_H | 16 #define SUBZERO_SRC_ICEFIXUPS_H |
| 17 | 17 |
| 18 #include "IceDefs.h" | 18 #include "IceDefs.h" |
| 19 | 19 |
| 20 namespace Ice { | 20 namespace Ice { |
| 21 | 21 |
| 22 class Assembler; | |
|
Jim Stichnoth
2015/10/27 21:41:21
Is this forward declaration needed? It's already
Karl
2015/10/27 22:16:41
Done.
| |
| 23 | |
| 22 /// Each target and container format has a different namespace of relocations. | 24 /// Each target and container format has a different namespace of relocations. |
| 23 /// This holds the specific target+container format's relocation number. | 25 /// This holds the specific target+container format's relocation number. |
| 24 using FixupKind = uint32_t; | 26 using FixupKind = uint32_t; |
| 25 | 27 |
| 26 /// Assembler fixups are positions in generated code/data that hold relocation | 28 /// Assembler fixups are positions in generated code/data that hold relocation |
| 27 /// information that needs to be processed before finalizing the code/data. | 29 /// information that needs to be processed before finalizing the code/data. |
| 28 struct AssemblerFixup { | 30 struct AssemblerFixup { |
| 29 AssemblerFixup &operator=(const AssemblerFixup &) = delete; | 31 AssemblerFixup &operator=(const AssemblerFixup &) = delete; |
| 30 | 32 |
| 31 public: | 33 public: |
| 32 AssemblerFixup() = default; | 34 AssemblerFixup() = default; |
| 33 AssemblerFixup(const AssemblerFixup &) = default; | 35 AssemblerFixup(const AssemblerFixup &) = default; |
| 34 intptr_t position() const { return position_; } | 36 intptr_t position() const { return position_; } |
| 35 void set_position(intptr_t Position) { position_ = Position; } | 37 void set_position(intptr_t Position) { position_ = Position; } |
| 36 | 38 |
| 37 FixupKind kind() const { return kind_; } | 39 FixupKind kind() const { return kind_; } |
| 38 void set_kind(FixupKind Kind) { kind_ = Kind; } | 40 void set_kind(FixupKind Kind) { kind_ = Kind; } |
| 39 | 41 |
| 40 RelocOffsetT offset() const; | 42 RelocOffsetT offset() const; |
| 41 IceString symbol(const GlobalContext *Ctx) const; | 43 IceString symbol(const GlobalContext *Ctx) const; |
| 42 | 44 |
| 43 static const Constant *NullSymbol; | 45 static const Constant *NullSymbol; |
| 44 bool isNullSymbol() const { return value_ == NullSymbol; } | 46 bool isNullSymbol() const { return value_ == NullSymbol; } |
| 45 | 47 |
| 46 void set_value(const Constant *Value) { value_ = Value; } | 48 void set_value(const Constant *Value) { value_ = Value; } |
| 47 | 49 |
| 48 /// Emits fixup, then returns the number of bytes to skip. | 50 /// Emits fixup, then returns the number of bytes to skip. |
| 49 virtual size_t emit(GlobalContext *Ctx, RelocOffsetT OverrideOffset, | 51 virtual size_t emit(GlobalContext *Ctx, const Assembler &Asm) const; |
| 50 bool IsPCRel) const; | |
| 51 | 52 |
| 52 private: | 53 private: |
| 53 intptr_t position_ = 0; | 54 intptr_t position_ = 0; |
| 54 FixupKind kind_ = 0; | 55 FixupKind kind_ = 0; |
| 55 const Constant *value_ = nullptr; | 56 const Constant *value_ = nullptr; |
| 56 }; | 57 }; |
| 57 | 58 |
| 58 /// Extends a fixup to be textual. That is, it emits text instead of a sequence | 59 /// Extends a fixup to be textual. That is, it emits text instead of a sequence |
| 59 /// of bytes. This class is used as a fallback for unimplemented emitIAS | 60 /// of bytes. This class is used as a fallback for unimplemented emitIAS |
| 60 /// methods, allowing them to generate compilable assembly code. | 61 /// methods, allowing them to generate compilable assembly code. |
| 61 class AssemblerTextFixup : public AssemblerFixup { | 62 class AssemblerTextFixup : public AssemblerFixup { |
| 62 AssemblerTextFixup() = delete; | 63 AssemblerTextFixup() = delete; |
| 63 AssemblerTextFixup(const AssemblerTextFixup &) = delete; | 64 AssemblerTextFixup(const AssemblerTextFixup &) = delete; |
| 64 AssemblerTextFixup &operator=(const AssemblerTextFixup &) = delete; | 65 AssemblerTextFixup &operator=(const AssemblerTextFixup &) = delete; |
| 65 | 66 |
| 66 public: | 67 public: |
| 67 AssemblerTextFixup(const std::string &Message, size_t NumBytes) | 68 AssemblerTextFixup(const std::string &Message, size_t NumBytes) |
| 68 : AssemblerFixup(), Message(Message), NumBytes(NumBytes) {} | 69 : AssemblerFixup(), Message(Message), NumBytes(NumBytes) {} |
| 69 ~AssemblerTextFixup() = default; | 70 ~AssemblerTextFixup() = default; |
| 70 virtual size_t emit(GlobalContext *Ctx, RelocOffsetT OverrideOffset, | 71 size_t emit(GlobalContext *Ctx, const Assembler &Asm) const override; |
| 71 bool isPcRel) const; | |
| 72 | 72 |
| 73 private: | 73 private: |
| 74 const std::string Message; | 74 const std::string Message; |
| 75 const size_t NumBytes; | 75 const size_t NumBytes; |
| 76 }; | 76 }; |
| 77 | 77 |
| 78 using FixupList = std::vector<AssemblerFixup>; | 78 using FixupList = std::vector<AssemblerFixup>; |
| 79 using FixupRefList = std::vector<AssemblerFixup *>; | 79 using FixupRefList = std::vector<AssemblerFixup *>; |
| 80 | 80 |
| 81 } // end of namespace Ice | 81 } // end of namespace Ice |
| 82 | 82 |
| 83 #endif // SUBZERO_SRC_ICEFIXUPS_H | 83 #endif // SUBZERO_SRC_ICEFIXUPS_H |
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