1 /* 2 * Copyright (C) 2016 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef ART_COMPILER_UTILS_X86_64_JNI_MACRO_ASSEMBLER_X86_64_H_ 18 #define ART_COMPILER_UTILS_X86_64_JNI_MACRO_ASSEMBLER_X86_64_H_ 19 20 #include <vector> 21 22 #include "assembler_x86_64.h" 23 #include "base/arena_containers.h" 24 #include "base/array_ref.h" 25 #include "base/enums.h" 26 #include "base/macros.h" 27 #include "offsets.h" 28 #include "utils/assembler.h" 29 #include "utils/jni_macro_assembler.h" 30 31 namespace art { 32 namespace x86_64 { 33 34 class X86_64JNIMacroAssembler final : public JNIMacroAssemblerFwd<X86_64Assembler, 35 PointerSize::k64> { 36 public: 37 explicit X86_64JNIMacroAssembler(ArenaAllocator* allocator) 38 : JNIMacroAssemblerFwd<X86_64Assembler, PointerSize::k64>(allocator) {} 39 virtual ~X86_64JNIMacroAssembler() {} 40 41 // 42 // Overridden common assembler high-level functionality 43 // 44 45 // Emit code that will create an activation on the stack 46 void BuildFrame(size_t frame_size, 47 ManagedRegister method_reg, 48 ArrayRef<const ManagedRegister> callee_save_regs, 49 const ManagedRegisterEntrySpills& entry_spills) override; 50 51 // Emit code that will remove an activation from the stack 52 void RemoveFrame(size_t frame_size, 53 ArrayRef<const ManagedRegister> callee_save_regs, 54 bool may_suspend) override; 55 56 void IncreaseFrameSize(size_t adjust) override; 57 void DecreaseFrameSize(size_t adjust) override; 58 59 // Store routines 60 void Store(FrameOffset offs, ManagedRegister src, size_t size) override; 61 void StoreRef(FrameOffset dest, ManagedRegister src) override; 62 void StoreRawPtr(FrameOffset dest, ManagedRegister src) override; 63 64 void StoreImmediateToFrame(FrameOffset dest, uint32_t imm, ManagedRegister scratch) override; 65 66 void StoreStackOffsetToThread(ThreadOffset64 thr_offs, 67 FrameOffset fr_offs, 68 ManagedRegister scratch) override; 69 70 void StoreStackPointerToThread(ThreadOffset64 thr_offs) override; 71 72 void StoreSpanning(FrameOffset dest, 73 ManagedRegister src, 74 FrameOffset in_off, 75 ManagedRegister scratch) override; 76 77 // Load routines 78 void Load(ManagedRegister dest, FrameOffset src, size_t size) override; 79 80 void LoadFromThread(ManagedRegister dest, ThreadOffset64 src, size_t size) override; 81 82 void LoadRef(ManagedRegister dest, FrameOffset src) override; 83 84 void LoadRef(ManagedRegister dest, 85 ManagedRegister base, 86 MemberOffset offs, 87 bool unpoison_reference) override; 88 89 void LoadRawPtr(ManagedRegister dest, ManagedRegister base, Offset offs) override; 90 91 void LoadRawPtrFromThread(ManagedRegister dest, ThreadOffset64 offs) override; 92 93 // Copying routines 94 void Move(ManagedRegister dest, ManagedRegister src, size_t size) override; 95 96 void CopyRawPtrFromThread(FrameOffset fr_offs, 97 ThreadOffset64 thr_offs, 98 ManagedRegister scratch) override; 99 100 void CopyRawPtrToThread(ThreadOffset64 thr_offs, FrameOffset fr_offs, ManagedRegister scratch) 101 override; 102 103 void CopyRef(FrameOffset dest, FrameOffset src, ManagedRegister scratch) override; 104 105 void Copy(FrameOffset dest, FrameOffset src, ManagedRegister scratch, size_t size) override; 106 107 void Copy(FrameOffset dest, 108 ManagedRegister src_base, 109 Offset src_offset, 110 ManagedRegister scratch, 111 size_t size) override; 112 113 void Copy(ManagedRegister dest_base, 114 Offset dest_offset, 115 FrameOffset src, 116 ManagedRegister scratch, 117 size_t size) override; 118 119 void Copy(FrameOffset dest, 120 FrameOffset src_base, 121 Offset src_offset, 122 ManagedRegister scratch, 123 size_t size) override; 124 125 void Copy(ManagedRegister dest, 126 Offset dest_offset, 127 ManagedRegister src, 128 Offset src_offset, 129 ManagedRegister scratch, 130 size_t size) override; 131 132 void Copy(FrameOffset dest, 133 Offset dest_offset, 134 FrameOffset src, 135 Offset src_offset, 136 ManagedRegister scratch, 137 size_t size) override; 138 139 void MemoryBarrier(ManagedRegister) override; 140 141 // Sign extension 142 void SignExtend(ManagedRegister mreg, size_t size) override; 143 144 // Zero extension 145 void ZeroExtend(ManagedRegister mreg, size_t size) override; 146 147 // Exploit fast access in managed code to Thread::Current() 148 void GetCurrentThread(ManagedRegister tr) override; 149 void GetCurrentThread(FrameOffset dest_offset, ManagedRegister scratch) override; 150 151 // Set up out_reg to hold a Object** into the handle scope, or to be null if the 152 // value is null and null_allowed. in_reg holds a possibly stale reference 153 // that can be used to avoid loading the handle scope entry to see if the value is 154 // null. 155 void CreateHandleScopeEntry(ManagedRegister out_reg, 156 FrameOffset handlescope_offset, 157 ManagedRegister in_reg, 158 bool null_allowed) override; 159 160 // Set up out_off to hold a Object** into the handle scope, or to be null if the 161 // value is null and null_allowed. 162 void CreateHandleScopeEntry(FrameOffset out_off, 163 FrameOffset handlescope_offset, 164 ManagedRegister scratch, 165 bool null_allowed) override; 166 167 // src holds a handle scope entry (Object**) load this into dst 168 void LoadReferenceFromHandleScope(ManagedRegister dst, ManagedRegister src) override; 169 170 // Heap::VerifyObject on src. In some cases (such as a reference to this) we 171 // know that src may not be null. 172 void VerifyObject(ManagedRegister src, bool could_be_null) override; 173 void VerifyObject(FrameOffset src, bool could_be_null) override; 174 175 // Call to address held at [base+offset] 176 void Call(ManagedRegister base, Offset offset, ManagedRegister scratch) override; 177 void Call(FrameOffset base, Offset offset, ManagedRegister scratch) override; 178 void CallFromThread(ThreadOffset64 offset, ManagedRegister scratch) override; 179 180 // Generate code to check if Thread::Current()->exception_ is non-null 181 // and branch to a ExceptionSlowPath if it is. 182 void ExceptionPoll(ManagedRegister scratch, size_t stack_adjust) override; 183 184 // Create a new label that can be used with Jump/Bind calls. 185 std::unique_ptr<JNIMacroLabel> CreateLabel() override; 186 // Emit an unconditional jump to the label. 187 void Jump(JNIMacroLabel* label) override; 188 // Emit a conditional jump to the label by applying a unary condition test to the register. 189 void Jump(JNIMacroLabel* label, JNIMacroUnaryCondition cond, ManagedRegister test) override; 190 // Code at this offset will serve as the target for the Jump call. 191 void Bind(JNIMacroLabel* label) override; 192 193 private: 194 DISALLOW_COPY_AND_ASSIGN(X86_64JNIMacroAssembler); 195 }; 196 197 class X86_64JNIMacroLabel final 198 : public JNIMacroLabelCommon<X86_64JNIMacroLabel, 199 art::Label, 200 InstructionSet::kX86_64> { 201 public: 202 art::Label* AsX86_64() { 203 return AsPlatformLabel(); 204 } 205 }; 206 207 } // namespace x86_64 208 } // namespace art 209 210 #endif // ART_COMPILER_UTILS_X86_64_JNI_MACRO_ASSEMBLER_X86_64_H_ 211
