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 * arena)37 explicit X86JNIMacroAssembler(ArenaAllocator* arena) : JNIMacroAssemblerFwd(arena) {} ~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, 48 const ManagedRegisterEntrySpills& entry_spills) OVERRIDE; 49 50 // Emit code that will remove an activation from the stack 51 void RemoveFrame(size_t frame_size, ArrayRef<const ManagedRegister> callee_save_regs) 52 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, ManagedRegister scratch) OVERRIDE; 63 64 void StoreStackOffsetToThread(ThreadOffset32 thr_offs, 65 FrameOffset fr_offs, 66 ManagedRegister scratch) OVERRIDE; 67 68 void StoreStackPointerToThread(ThreadOffset32 thr_offs) OVERRIDE; 69 70 void StoreSpanning(FrameOffset dest, ManagedRegister src, FrameOffset in_off, 71 ManagedRegister scratch) OVERRIDE; 72 73 // Load routines 74 void Load(ManagedRegister dest, FrameOffset src, size_t size) OVERRIDE; 75 76 void LoadFromThread(ManagedRegister dest, ThreadOffset32 src, size_t size) OVERRIDE; 77 78 void LoadRef(ManagedRegister dest, FrameOffset src) OVERRIDE; 79 80 void LoadRef(ManagedRegister dest, ManagedRegister base, MemberOffset offs, 81 bool unpoison_reference) OVERRIDE; 82 83 void LoadRawPtr(ManagedRegister dest, ManagedRegister base, Offset offs) OVERRIDE; 84 85 void LoadRawPtrFromThread(ManagedRegister dest, ThreadOffset32 offs) OVERRIDE; 86 87 // Copying routines 88 void Move(ManagedRegister dest, ManagedRegister src, size_t size) OVERRIDE; 89 90 void CopyRawPtrFromThread(FrameOffset fr_offs, 91 ThreadOffset32 thr_offs, 92 ManagedRegister scratch) OVERRIDE; 93 94 void CopyRawPtrToThread(ThreadOffset32 thr_offs, FrameOffset fr_offs, ManagedRegister scratch) 95 OVERRIDE; 96 97 void CopyRef(FrameOffset dest, FrameOffset src, ManagedRegister scratch) OVERRIDE; 98 99 void Copy(FrameOffset dest, FrameOffset src, ManagedRegister scratch, size_t size) OVERRIDE; 100 101 void Copy(FrameOffset dest, ManagedRegister src_base, Offset src_offset, ManagedRegister scratch, 102 size_t size) OVERRIDE; 103 104 void Copy(ManagedRegister dest_base, Offset dest_offset, FrameOffset src, ManagedRegister scratch, 105 size_t size) OVERRIDE; 106 107 void Copy(FrameOffset dest, FrameOffset src_base, Offset src_offset, ManagedRegister scratch, 108 size_t size) OVERRIDE; 109 110 void Copy(ManagedRegister dest, Offset dest_offset, ManagedRegister src, Offset src_offset, 111 ManagedRegister scratch, size_t size) OVERRIDE; 112 113 void Copy(FrameOffset dest, Offset dest_offset, FrameOffset src, Offset src_offset, 114 ManagedRegister scratch, size_t size) OVERRIDE; 115 116 void MemoryBarrier(ManagedRegister) OVERRIDE; 117 118 // Sign extension 119 void SignExtend(ManagedRegister mreg, size_t size) OVERRIDE; 120 121 // Zero extension 122 void ZeroExtend(ManagedRegister mreg, size_t size) OVERRIDE; 123 124 // Exploit fast access in managed code to Thread::Current() 125 void GetCurrentThread(ManagedRegister tr) OVERRIDE; 126 void GetCurrentThread(FrameOffset dest_offset, ManagedRegister scratch) OVERRIDE; 127 128 // Set up out_reg to hold a Object** into the handle scope, or to be null if the 129 // value is null and null_allowed. in_reg holds a possibly stale reference 130 // that can be used to avoid loading the handle scope entry to see if the value is 131 // null. 132 void CreateHandleScopeEntry(ManagedRegister out_reg, FrameOffset handlescope_offset, 133 ManagedRegister in_reg, bool null_allowed) OVERRIDE; 134 135 // Set up out_off to hold a Object** into the handle scope, or to be null if the 136 // value is null and null_allowed. 137 void CreateHandleScopeEntry(FrameOffset out_off, FrameOffset handlescope_offset, 138 ManagedRegister scratch, bool null_allowed) OVERRIDE; 139 140 // src holds a handle scope entry (Object**) load this into dst 141 void LoadReferenceFromHandleScope(ManagedRegister dst, ManagedRegister src) OVERRIDE; 142 143 // Heap::VerifyObject on src. In some cases (such as a reference to this) we 144 // know that src may not be null. 145 void VerifyObject(ManagedRegister src, bool could_be_null) OVERRIDE; 146 void VerifyObject(FrameOffset src, bool could_be_null) OVERRIDE; 147 148 // Call to address held at [base+offset] 149 void Call(ManagedRegister base, Offset offset, ManagedRegister scratch) OVERRIDE; 150 void Call(FrameOffset base, Offset offset, ManagedRegister scratch) OVERRIDE; 151 void CallFromThread(ThreadOffset32 offset, ManagedRegister scratch) OVERRIDE; 152 153 // Generate code to check if Thread::Current()->exception_ is non-null 154 // and branch to a ExceptionSlowPath if it is. 155 void ExceptionPoll(ManagedRegister scratch, size_t stack_adjust) OVERRIDE; 156 157 // Create a new label that can be used with Jump/Bind calls. 158 std::unique_ptr<JNIMacroLabel> CreateLabel() OVERRIDE; 159 // Emit an unconditional jump to the label. 160 void Jump(JNIMacroLabel* label) OVERRIDE; 161 // Emit a conditional jump to the label by applying a unary condition test to the register. 162 void Jump(JNIMacroLabel* label, JNIMacroUnaryCondition cond, ManagedRegister test) OVERRIDE; 163 // Code at this offset will serve as the target for the Jump call. 164 void Bind(JNIMacroLabel* label) OVERRIDE; 165 166 private: 167 DISALLOW_COPY_AND_ASSIGN(X86JNIMacroAssembler); 168 }; 169 170 class X86JNIMacroLabel FINAL 171 : public JNIMacroLabelCommon<X86JNIMacroLabel, 172 art::Label, 173 kX86> { 174 public: AsX86()175 art::Label* AsX86() { 176 return AsPlatformLabel(); 177 } 178 }; 179 180 } // namespace x86 181 } // namespace art 182 183 #endif // ART_COMPILER_UTILS_X86_JNI_MACRO_ASSEMBLER_X86_H_ 184