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/*
* Copyright (C) 2014 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_ARM64_CONTEXT_ARM64_H_
#define ART_RUNTIME_ARCH_ARM64_CONTEXT_ARM64_H_
#include <android-base/logging.h>
#include "arch/context.h"
#include "base/macros.h"
#include "registers_arm64.h"
namespace art {
namespace arm64 {
class Arm64Context FINAL : public Context {
public:
Arm64Context() {
Reset();
}
~Arm64Context() {}
void Reset() OVERRIDE;
void FillCalleeSaves(uint8_t* frame, const QuickMethodFrameInfo& fr) OVERRIDE;
void SetSP(uintptr_t new_sp) OVERRIDE {
SetGPR(SP, new_sp);
}
void SetPC(uintptr_t new_lr) OVERRIDE {
SetGPR(kPC, new_lr);
}
void SetArg0(uintptr_t new_arg0_value) OVERRIDE {
SetGPR(X0, new_arg0_value);
}
bool IsAccessibleGPR(uint32_t reg) OVERRIDE {
DCHECK_LT(reg, arraysize(gprs_));
return gprs_[reg] != nullptr;
}
uintptr_t* GetGPRAddress(uint32_t reg) OVERRIDE {
DCHECK_LT(reg, arraysize(gprs_));
return gprs_[reg];
}
uintptr_t GetGPR(uint32_t reg) OVERRIDE {
// Note: PC isn't an available GPR (outside of internals), so don't allow retrieving the value.
DCHECK_LT(reg, static_cast<uint32_t>(kNumberOfXRegisters));
DCHECK(IsAccessibleGPR(reg));
return *gprs_[reg];
}
void SetGPR(uint32_t reg, uintptr_t value) OVERRIDE;
bool IsAccessibleFPR(uint32_t reg) OVERRIDE {
DCHECK_LT(reg, static_cast<uint32_t>(kNumberOfDRegisters));
return fprs_[reg] != nullptr;
}
uintptr_t GetFPR(uint32_t reg) OVERRIDE {
DCHECK_LT(reg, static_cast<uint32_t>(kNumberOfDRegisters));
DCHECK(IsAccessibleFPR(reg));
return *fprs_[reg];
}
void SetFPR(uint32_t reg, uintptr_t value) OVERRIDE;
void SmashCallerSaves() OVERRIDE;
NO_RETURN void DoLongJump() OVERRIDE;
static constexpr size_t kPC = kNumberOfXRegisters;
private:
// Pointers to register locations, initialized to null or the specific registers below. We need
// an additional one for the PC.
uintptr_t* gprs_[kNumberOfXRegisters + 1];
uint64_t * fprs_[kNumberOfDRegisters];
// Hold values for sp, pc and arg0 if they are not located within a stack frame.
uintptr_t sp_, pc_, arg0_;
};
} // namespace arm64
} // namespace art
#endif // ART_RUNTIME_ARCH_ARM64_CONTEXT_ARM64_H_