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_JNI_MACRO_ASSEMBLER_X86_H_ 18 #define ART_COMPILER_UTILS_X86_JNI_MACRO_ASSEMBLER_X86_H_ 19 20 #include <vector> 21 22 #include "assembler_x86.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/jni_macro_assembler.h" 29 30 namespace art { 31 namespace x86 { 32 33 class X86JNIMacroLabel; 34 35 class X86JNIMacroAssembler final : public JNIMacroAssemblerFwd<X86Assembler, PointerSize::k32> { 36 public: X86JNIMacroAssembler(ArenaAllocator * allocator)37 explicit X86JNIMacroAssembler(ArenaAllocator* allocator) : JNIMacroAssemblerFwd(allocator) {} ~X86JNIMacroAssembler()38 virtual ~X86JNIMacroAssembler() {} 39 40 // 41 // Overridden common assembler high-level functionality 42 // 43 44 // Emit code that will create an activation on the stack 45 void BuildFrame(size_t frame_size, 46 ManagedRegister method_reg, 47 ArrayRef<const ManagedRegister> callee_save_regs) override; 48 49 // Emit code that will remove an activation from the stack 50 void RemoveFrame(size_t frame_size, 51 ArrayRef<const ManagedRegister> callee_save_regs, 52 bool may_suspend) override; 53 54 void IncreaseFrameSize(size_t adjust) override; 55 void DecreaseFrameSize(size_t adjust) override; 56 57 // Store routines 58 void Store(FrameOffset offs, ManagedRegister src, size_t size) override; 59 void StoreRef(FrameOffset dest, ManagedRegister src) override; 60 void StoreRawPtr(FrameOffset dest, ManagedRegister src) override; 61 62 void StoreImmediateToFrame(FrameOffset dest, uint32_t imm) override; 63 64 void StoreStackOffsetToThread(ThreadOffset32 thr_offs, FrameOffset fr_offs) override; 65 66 void StoreStackPointerToThread(ThreadOffset32 thr_offs) override; 67 68 void StoreSpanning(FrameOffset dest, ManagedRegister src, FrameOffset in_off) override; 69 70 // Load routines 71 void Load(ManagedRegister dest, FrameOffset src, size_t size) override; 72 73 void LoadFromThread(ManagedRegister dest, ThreadOffset32 src, size_t size) override; 74 75 void LoadRef(ManagedRegister dest, FrameOffset src) override; 76 77 void LoadRef(ManagedRegister dest, ManagedRegister base, MemberOffset offs, 78 bool unpoison_reference) override; 79 80 void LoadRawPtr(ManagedRegister dest, ManagedRegister base, Offset offs) override; 81 82 void LoadRawPtrFromThread(ManagedRegister dest, ThreadOffset32 offs) override; 83 84 // Copying routines 85 void MoveArguments(ArrayRef<ArgumentLocation> dests, ArrayRef<ArgumentLocation> srcs) override; 86 87 void Move(ManagedRegister dest, ManagedRegister src, size_t size) override; 88 89 void CopyRawPtrFromThread(FrameOffset fr_offs, ThreadOffset32 thr_offs) override; 90 91 void CopyRawPtrToThread(ThreadOffset32 thr_offs, FrameOffset fr_offs, ManagedRegister scratch) 92 override; 93 94 void CopyRef(FrameOffset dest, FrameOffset src) override; 95 void CopyRef(FrameOffset dest, 96 ManagedRegister base, 97 MemberOffset offs, 98 bool unpoison_reference) override; 99 100 void Copy(FrameOffset dest, FrameOffset src, size_t size) override; 101 102 void Copy(FrameOffset dest, ManagedRegister src_base, Offset src_offset, ManagedRegister scratch, 103 size_t size) override; 104 105 void Copy(ManagedRegister dest_base, Offset dest_offset, FrameOffset src, ManagedRegister scratch, 106 size_t size) override; 107 108 void Copy(FrameOffset dest, FrameOffset src_base, Offset src_offset, ManagedRegister scratch, 109 size_t size) override; 110 111 void Copy(ManagedRegister dest, Offset dest_offset, ManagedRegister src, Offset src_offset, 112 ManagedRegister scratch, size_t size) override; 113 114 void Copy(FrameOffset dest, Offset dest_offset, FrameOffset src, Offset src_offset, 115 ManagedRegister scratch, size_t size) override; 116 117 void MemoryBarrier(ManagedRegister) override; 118 119 // Sign extension 120 void SignExtend(ManagedRegister mreg, size_t size) override; 121 122 // Zero extension 123 void ZeroExtend(ManagedRegister mreg, size_t size) override; 124 125 // Exploit fast access in managed code to Thread::Current() 126 void GetCurrentThread(ManagedRegister dest) override; 127 void GetCurrentThread(FrameOffset dest_offset) override; 128 129 // Set up out_reg to hold a Object** into the handle scope, or to be null if the 130 // value is null and null_allowed. in_reg holds a possibly stale reference 131 // that can be used to avoid loading the handle scope entry to see if the value is 132 // null. 133 void CreateHandleScopeEntry(ManagedRegister out_reg, 134 FrameOffset handlescope_offset, 135 ManagedRegister in_reg, 136 bool null_allowed) override; 137 138 // Set up out_off to hold a Object** into the handle scope, or to be null if the 139 // value is null and null_allowed. 140 void CreateHandleScopeEntry(FrameOffset out_off, 141 FrameOffset handlescope_offset, 142 bool null_allowed) override; 143 144 // src holds a handle scope entry (Object**) load this into dst 145 void LoadReferenceFromHandleScope(ManagedRegister dst, ManagedRegister src) override; 146 147 // Heap::VerifyObject on src. In some cases (such as a reference to this) we 148 // know that src may not be null. 149 void VerifyObject(ManagedRegister src, bool could_be_null) override; 150 void VerifyObject(FrameOffset src, bool could_be_null) override; 151 152 // Jump to address held at [base+offset] (used for tail calls). 153 void Jump(ManagedRegister base, Offset offset) override; 154 155 // Call to address held at [base+offset] 156 void Call(ManagedRegister base, Offset offset) override; 157 void Call(FrameOffset base, Offset offset) override; 158 void CallFromThread(ThreadOffset32 offset) override; 159 160 // Generate code to check if Thread::Current()->exception_ is non-null 161 // and branch to a ExceptionSlowPath if it is. 162 void ExceptionPoll(size_t stack_adjust) override; 163 164 // Create a new label that can be used with Jump/Bind calls. 165 std::unique_ptr<JNIMacroLabel> CreateLabel() override; 166 // Emit an unconditional jump to the label. 167 void Jump(JNIMacroLabel* label) override; 168 // Emit a conditional jump to the label by applying a unary condition test to the GC marking flag. 169 void TestGcMarking(JNIMacroLabel* label, JNIMacroUnaryCondition cond) override; 170 // Code at this offset will serve as the target for the Jump call. 171 void Bind(JNIMacroLabel* label) override; 172 173 private: 174 DISALLOW_COPY_AND_ASSIGN(X86JNIMacroAssembler); 175 }; 176 177 class X86JNIMacroLabel final 178 : public JNIMacroLabelCommon<X86JNIMacroLabel, 179 art::Label, 180 InstructionSet::kX86> { 181 public: AsX86()182 art::Label* AsX86() { 183 return AsPlatformLabel(); 184 } 185 }; 186 187 } // namespace x86 188 } // namespace art 189 190 #endif // ART_COMPILER_UTILS_X86_JNI_MACRO_ASSEMBLER_X86_H_ 191