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_MIPS_CONTEXT_MIPS_H_ 18 #define ART_RUNTIME_ARCH_MIPS_CONTEXT_MIPS_H_ 19 20 #include "arch/context.h" 21 #include "base/logging.h" 22 #include "registers_mips.h" 23 24 namespace art { 25 namespace mips { 26 27 class MipsContext : public Context { 28 public: 29 MipsContext() { 30 Reset(); 31 } 32 virtual ~MipsContext() {} 33 34 void Reset() OVERRIDE; 35 36 void FillCalleeSaves(const StackVisitor& fr) OVERRIDE SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 37 38 void SetSP(uintptr_t new_sp) OVERRIDE { 39 bool success = SetGPR(SP, new_sp); 40 CHECK(success) << "Failed to set SP register"; 41 } 42 43 void SetPC(uintptr_t new_pc) OVERRIDE { 44 bool success = SetGPR(RA, new_pc); 45 CHECK(success) << "Failed to set RA register"; 46 } 47 48 uintptr_t* GetGPRAddress(uint32_t reg) OVERRIDE { 49 DCHECK_LT(reg, static_cast<uint32_t>(kNumberOfCoreRegisters)); 50 return gprs_[reg]; 51 } 52 53 bool GetGPR(uint32_t reg, uintptr_t* val) OVERRIDE { 54 CHECK_LT(reg, static_cast<uint32_t>(kNumberOfCoreRegisters)); 55 if (gprs_[reg] == nullptr) { 56 return false; 57 } else { 58 DCHECK(val != nullptr); 59 *val = *gprs_[reg]; 60 return true; 61 } 62 } 63 64 bool SetGPR(uint32_t reg, uintptr_t value) OVERRIDE; 65 66 bool GetFPR(uint32_t reg, uintptr_t* val) OVERRIDE { 67 CHECK_LT(reg, static_cast<uint32_t>(kNumberOfFRegisters)); 68 if (fprs_[reg] == nullptr) { 69 return false; 70 } else { 71 DCHECK(val != nullptr); 72 *val = *fprs_[reg]; 73 return true; 74 } 75 } 76 77 bool SetFPR(uint32_t reg, uintptr_t value) OVERRIDE; 78 79 void SmashCallerSaves() OVERRIDE; 80 void DoLongJump() OVERRIDE; 81 82 private: 83 // Pointers to registers in the stack, initialized to NULL except for the special cases below. 84 uintptr_t* gprs_[kNumberOfCoreRegisters]; 85 uint32_t* fprs_[kNumberOfFRegisters]; 86 // Hold values for sp and ra (return address) if they are not located within a stack frame. 87 uintptr_t sp_, ra_; 88 }; 89 } // namespace mips 90 } // namespace art 91 92 #endif // ART_RUNTIME_ARCH_MIPS_CONTEXT_MIPS_H_ 93
