1 /* 2 * Copyright (C) 2014 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_RUNTIME_ARCH_ARM64_CONTEXT_ARM64_H_ 18 #define ART_RUNTIME_ARCH_ARM64_CONTEXT_ARM64_H_ 19 20 #include "arch/context.h" 21 #include "base/logging.h" 22 #include "base/macros.h" 23 #include "registers_arm64.h" 24 25 namespace art { 26 namespace arm64 { 27 28 class Arm64Context : public Context { 29 public: 30 Arm64Context() { 31 Reset(); 32 } 33 34 ~Arm64Context() {} 35 36 void Reset() OVERRIDE; 37 38 void FillCalleeSaves(uint8_t* frame, const QuickMethodFrameInfo& fr) OVERRIDE; 39 40 void SetSP(uintptr_t new_sp) OVERRIDE { 41 SetGPR(SP, new_sp); 42 } 43 44 void SetPC(uintptr_t new_lr) OVERRIDE { 45 SetGPR(kPC, new_lr); 46 } 47 48 void SetArg0(uintptr_t new_arg0_value) OVERRIDE { 49 SetGPR(X0, new_arg0_value); 50 } 51 52 bool IsAccessibleGPR(uint32_t reg) OVERRIDE { 53 DCHECK_LT(reg, arraysize(gprs_)); 54 return gprs_[reg] != nullptr; 55 } 56 57 uintptr_t* GetGPRAddress(uint32_t reg) OVERRIDE { 58 DCHECK_LT(reg, arraysize(gprs_)); 59 return gprs_[reg]; 60 } 61 62 uintptr_t GetGPR(uint32_t reg) OVERRIDE { 63 // Note: PC isn't an available GPR (outside of internals), so don't allow retrieving the value. 64 DCHECK_LT(reg, static_cast<uint32_t>(kNumberOfXRegisters)); 65 DCHECK(IsAccessibleGPR(reg)); 66 return *gprs_[reg]; 67 } 68 69 void SetGPR(uint32_t reg, uintptr_t value) OVERRIDE; 70 71 bool IsAccessibleFPR(uint32_t reg) OVERRIDE { 72 DCHECK_LT(reg, static_cast<uint32_t>(kNumberOfDRegisters)); 73 return fprs_[reg] != nullptr; 74 } 75 76 uintptr_t GetFPR(uint32_t reg) OVERRIDE { 77 DCHECK_LT(reg, static_cast<uint32_t>(kNumberOfDRegisters)); 78 DCHECK(IsAccessibleFPR(reg)); 79 return *fprs_[reg]; 80 } 81 82 void SetFPR(uint32_t reg, uintptr_t value) OVERRIDE; 83 84 void SmashCallerSaves() OVERRIDE; 85 NO_RETURN void DoLongJump() OVERRIDE; 86 87 static constexpr size_t kPC = kNumberOfXRegisters; 88 89 private: 90 // Pointers to register locations, initialized to null or the specific registers below. We need 91 // an additional one for the PC. 92 uintptr_t* gprs_[kNumberOfXRegisters + 1]; 93 uint64_t * fprs_[kNumberOfDRegisters]; 94 // Hold values for sp, pc and arg0 if they are not located within a stack frame. 95 uintptr_t sp_, pc_, arg0_; 96 }; 97 98 } // namespace arm64 99 } // namespace art 100 101 #endif // ART_RUNTIME_ARCH_ARM64_CONTEXT_ARM64_H_ 102
