1 /* 2 * Copyright (C) 2011 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_ARM_CONTEXT_ARM_H_ 18 #define ART_RUNTIME_ARCH_ARM_CONTEXT_ARM_H_ 19 20 #include <android-base/logging.h> 21 22 #include "arch/context.h" 23 #include "base/macros.h" 24 #include "registers_arm.h" 25 26 namespace art { 27 namespace arm { 28 29 class ArmContext final : public Context { 30 public: ArmContext()31 ArmContext() { 32 Reset(); 33 } 34 ~ArmContext()35 virtual ~ArmContext() {} 36 37 void Reset() override; 38 39 void FillCalleeSaves(uint8_t* frame, const QuickMethodFrameInfo& fr) override; 40 SetSP(uintptr_t new_sp)41 void SetSP(uintptr_t new_sp) override { 42 SetGPR(SP, new_sp); 43 } 44 SetPC(uintptr_t new_pc)45 void SetPC(uintptr_t new_pc) override { 46 SetGPR(PC, new_pc); 47 } 48 SetArg0(uintptr_t new_arg0_value)49 void SetArg0(uintptr_t new_arg0_value) override { 50 SetGPR(R0, new_arg0_value); 51 } 52 IsAccessibleGPR(uint32_t reg)53 bool IsAccessibleGPR(uint32_t reg) override { 54 DCHECK_LT(reg, static_cast<uint32_t>(kNumberOfCoreRegisters)); 55 return gprs_[reg] != nullptr; 56 } 57 GetGPRAddress(uint32_t reg)58 uintptr_t* GetGPRAddress(uint32_t reg) override { 59 DCHECK_LT(reg, static_cast<uint32_t>(kNumberOfCoreRegisters)); 60 return gprs_[reg]; 61 } 62 GetGPR(uint32_t reg)63 uintptr_t GetGPR(uint32_t reg) override { 64 DCHECK_LT(reg, static_cast<uint32_t>(kNumberOfCoreRegisters)); 65 DCHECK(IsAccessibleGPR(reg)); 66 return *gprs_[reg]; 67 } 68 69 void SetGPR(uint32_t reg, uintptr_t value) override; 70 IsAccessibleFPR(uint32_t reg)71 bool IsAccessibleFPR(uint32_t reg) override { 72 DCHECK_LT(reg, static_cast<uint32_t>(kNumberOfSRegisters)); 73 return fprs_[reg] != nullptr; 74 } 75 GetFPR(uint32_t reg)76 uintptr_t GetFPR(uint32_t reg) override { 77 DCHECK_LT(reg, static_cast<uint32_t>(kNumberOfSRegisters)); 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 private: 88 // Pointers to register locations, initialized to null or the specific registers below. 89 uintptr_t* gprs_[kNumberOfCoreRegisters]; 90 uint32_t* fprs_[kNumberOfSRegisters]; 91 // Hold values for sp and pc if they are not located within a stack frame. 92 uintptr_t sp_, pc_, arg0_; 93 }; 94 95 } // namespace arm 96 } // namespace art 97 98 #endif // ART_RUNTIME_ARCH_ARM_CONTEXT_ARM_H_ 99