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 <android-base/logging.h> 21 22 #include "arch/context.h" 23 #include "base/macros.h" 24 #include "registers_arm64.h" 25 26 namespace art { 27 namespace arm64 { 28 29 class Arm64Context final : public Context { 30 public: 31 Arm64Context() { 32 Reset(); 33 } 34 35 ~Arm64Context() {} 36 37 void Reset() override; 38 39 void FillCalleeSaves(uint8_t* frame, const QuickMethodFrameInfo& fr) override; 40 41 void SetSP(uintptr_t new_sp) override { 42 SetGPR(SP, new_sp); 43 } 44 45 void SetPC(uintptr_t new_lr) override { 46 SetGPR(kPC, new_lr); 47 } 48 49 void SetArg0(uintptr_t new_arg0_value) override { 50 SetGPR(X0, new_arg0_value); 51 } 52 53 bool IsAccessibleGPR(uint32_t reg) override { 54 DCHECK_LT(reg, arraysize(gprs_)); 55 return gprs_[reg] != nullptr; 56 } 57 58 uintptr_t* GetGPRAddress(uint32_t reg) override { 59 DCHECK_LT(reg, arraysize(gprs_)); 60 return gprs_[reg]; 61 } 62 63 uintptr_t GetGPR(uint32_t reg) override { 64 // Note: PC isn't an available GPR (outside of internals), so don't allow retrieving the value. 65 DCHECK_LT(reg, static_cast<uint32_t>(kNumberOfXRegisters)); 66 DCHECK(IsAccessibleGPR(reg)); 67 return *gprs_[reg]; 68 } 69 70 void SetGPR(uint32_t reg, uintptr_t value) override; 71 72 bool IsAccessibleFPR(uint32_t reg) override { 73 DCHECK_LT(reg, static_cast<uint32_t>(kNumberOfDRegisters)); 74 return fprs_[reg] != nullptr; 75 } 76 77 uintptr_t GetFPR(uint32_t reg) override { 78 DCHECK_LT(reg, static_cast<uint32_t>(kNumberOfDRegisters)); 79 DCHECK(IsAccessibleFPR(reg)); 80 return *fprs_[reg]; 81 } 82 83 void SetFPR(uint32_t reg, uintptr_t value) override; 84 85 void SmashCallerSaves() override; 86 NO_RETURN void DoLongJump() override; 87 88 static constexpr size_t kPC = kNumberOfXRegisters; 89 90 private: 91 // Pointers to register locations, initialized to null or the specific registers below. We need 92 // an additional one for the PC. 93 uintptr_t* gprs_[kNumberOfXRegisters + 1]; 94 uint64_t * fprs_[kNumberOfDRegisters]; 95 // Hold values for sp, pc and arg0 if they are not located within a stack frame. 96 uintptr_t sp_, pc_, arg0_; 97 }; 98 99 } // namespace arm64 100 } // namespace art 101 102 #endif // ART_RUNTIME_ARCH_ARM64_CONTEXT_ARM64_H_ 103
