text: /*
   * Copyright (C) 2011 The Android Open Source Project
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  #ifndef ART_RUNTIME_ARCH_X86_64_CONTEXT_X86_64_H_
  #define ART_RUNTIME_ARCH_X86_64_CONTEXT_X86_64_H_
  
  #include <museum/5.0.0/art/runtime/arch/context.h>
  #include <museum/5.0.0/art/runtime/base/logging.h>
  #include <museum/5.0.0/art/runtime/arch/x86_64/registers_x86_64.h>
  
  namespace facebook { namespace museum { namespace MUSEUM_VERSION { namespace art {
  namespace x86_64 {
  
  class X86_64Context : public Context {
   public:
    X86_64Context() {
      Reset();
    }
    virtual ~X86_64Context() {}
  
    void Reset() OVERRIDE;
  
    void FillCalleeSaves(const StackVisitor& fr) OVERRIDE SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
  
    void SetSP(uintptr_t new_sp) OVERRIDE {
      bool success = SetGPR(RSP, new_sp);
      CHECK(success) << "Failed to set RSP register";
    }
  
    void SetPC(uintptr_t new_pc) OVERRIDE {
      rip_ = new_pc;
    }
  
    uintptr_t* GetGPRAddress(uint32_t reg) OVERRIDE {
      DCHECK_LT(reg, static_cast<uint32_t>(kNumberOfCpuRegisters));
      return gprs_[reg];
    }
  
    bool GetGPR(uint32_t reg, uintptr_t* val) OVERRIDE {
      DCHECK_LT(reg, static_cast<uint32_t>(kNumberOfCpuRegisters));
      if (gprs_[reg] == nullptr) {
        return false;
      } else {
        DCHECK(val != nullptr);
        *val = *gprs_[reg];
        return true;
      }
    }
  
    bool SetGPR(uint32_t reg, uintptr_t value) OVERRIDE;
  
    bool GetFPR(uint32_t reg, uintptr_t* val) OVERRIDE {
      DCHECK_LT(reg, static_cast<uint32_t>(kNumberOfFloatRegisters));
      if (fprs_[reg] == nullptr) {
        return false;
      } else {
        DCHECK(val != nullptr);
        *val = *fprs_[reg];
        return true;
      }
    }
  
    bool SetFPR(uint32_t reg, uintptr_t value) OVERRIDE;
  
    void SmashCallerSaves() OVERRIDE;
    void DoLongJump() OVERRIDE;
  
   private:
    // Pointers to register locations. Values are initialized to NULL or the special registers below.
    uintptr_t* gprs_[kNumberOfCpuRegisters];
    uint64_t* fprs_[kNumberOfFloatRegisters];
    // Hold values for rsp and rip if they are not located within a stack frame. RIP is somewhat
    // special in that it cannot be encoded normally as a register operand to an instruction (except
    // in 64bit addressing modes).
    uintptr_t rsp_, rip_;
  };
  }  // namespace x86_64
  } } } } // namespace facebook::museum::MUSEUM_VERSION::art
  
  #endif  // ART_RUNTIME_ARCH_X86_64_CONTEXT_X86_64_H_
  