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 "arch/context.h" 21 #include "base/logging.h" 22 #include "base/macros.h" 23 #include "registers_arm.h" 24 25 namespace art { 26 namespace arm { 27 28 class ArmContext : public Context { 29 public: 30 ArmContext() { 31 Reset(); 32 } 33 34 virtual ~ArmContext() {} 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_pc) OVERRIDE { 45 SetGPR(PC, new_pc); 46 } 47 48 void SetArg0(uintptr_t new_arg0_value) OVERRIDE { 49 SetGPR(R0, new_arg0_value); 50 } 51 52 bool IsAccessibleGPR(uint32_t reg) OVERRIDE { 53 DCHECK_LT(reg, static_cast<uint32_t>(kNumberOfCoreRegisters)); 54 return gprs_[reg] != nullptr; 55 } 56 57 uintptr_t* GetGPRAddress(uint32_t reg) OVERRIDE { 58 DCHECK_LT(reg, static_cast<uint32_t>(kNumberOfCoreRegisters)); 59 return gprs_[reg]; 60 } 61 62 uintptr_t GetGPR(uint32_t reg) OVERRIDE { 63 DCHECK_LT(reg, static_cast<uint32_t>(kNumberOfCoreRegisters)); 64 DCHECK(IsAccessibleGPR(reg)); 65 return *gprs_[reg]; 66 } 67 68 void SetGPR(uint32_t reg, uintptr_t value) OVERRIDE; 69 70 bool IsAccessibleFPR(uint32_t reg) OVERRIDE { 71 DCHECK_LT(reg, static_cast<uint32_t>(kNumberOfSRegisters)); 72 return fprs_[reg] != nullptr; 73 } 74 75 uintptr_t GetFPR(uint32_t reg) OVERRIDE { 76 DCHECK_LT(reg, static_cast<uint32_t>(kNumberOfSRegisters)); 77 DCHECK(IsAccessibleFPR(reg)); 78 return *fprs_[reg]; 79 } 80 81 void SetFPR(uint32_t reg, uintptr_t value) OVERRIDE; 82 83 void SmashCallerSaves() OVERRIDE; 84 NO_RETURN void DoLongJump() OVERRIDE; 85 86 private: 87 // Pointers to register locations, initialized to null or the specific registers below. 88 uintptr_t* gprs_[kNumberOfCoreRegisters]; 89 uint32_t* fprs_[kNumberOfSRegisters]; 90 // Hold values for sp and pc if they are not located within a stack frame. 91 uintptr_t sp_, pc_, arg0_; 92 }; 93 94 } // namespace arm 95 } // namespace art 96 97 #endif // ART_RUNTIME_ARCH_ARM_CONTEXT_ARM_H_ 98
