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107 lines
2.9 KiB
107 lines
2.9 KiB
4 months ago
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/*
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* Copyright (C) 2014 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef ART_RUNTIME_ARCH_ARM64_CONTEXT_ARM64_H_
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#define ART_RUNTIME_ARCH_ARM64_CONTEXT_ARM64_H_
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#include <android-base/logging.h>
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#include "arch/context.h"
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#include "base/macros.h"
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#include "registers_arm64.h"
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namespace art {
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namespace arm64 {
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class Arm64Context final : public Context {
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public:
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Arm64Context() {
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Reset();
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}
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~Arm64Context() {}
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void Reset() override;
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void FillCalleeSaves(uint8_t* frame, const QuickMethodFrameInfo& fr) override;
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void SetSP(uintptr_t new_sp) override {
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SetGPR(SP, new_sp);
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}
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void SetPC(uintptr_t new_lr) override {
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SetGPR(kPC, new_lr);
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}
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void SetNterpDexPC(uintptr_t dex_pc_ptr) override {
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SetGPR(X22, dex_pc_ptr);
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}
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void SetArg0(uintptr_t new_arg0_value) override {
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SetGPR(X0, new_arg0_value);
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}
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bool IsAccessibleGPR(uint32_t reg) override {
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DCHECK_LT(reg, arraysize(gprs_));
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return gprs_[reg] != nullptr;
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}
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uintptr_t* GetGPRAddress(uint32_t reg) override {
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DCHECK_LT(reg, arraysize(gprs_));
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return gprs_[reg];
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}
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uintptr_t GetGPR(uint32_t reg) override {
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// Note: PC isn't an available GPR (outside of internals), so don't allow retrieving the value.
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DCHECK_LT(reg, static_cast<uint32_t>(kNumberOfXRegisters));
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DCHECK(IsAccessibleGPR(reg));
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return *gprs_[reg];
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}
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void SetGPR(uint32_t reg, uintptr_t value) override;
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bool IsAccessibleFPR(uint32_t reg) override {
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DCHECK_LT(reg, static_cast<uint32_t>(kNumberOfDRegisters));
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return fprs_[reg] != nullptr;
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}
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uintptr_t GetFPR(uint32_t reg) override {
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DCHECK_LT(reg, static_cast<uint32_t>(kNumberOfDRegisters));
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DCHECK(IsAccessibleFPR(reg));
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return *fprs_[reg];
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}
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void SetFPR(uint32_t reg, uintptr_t value) override;
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void SmashCallerSaves() override;
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NO_RETURN void DoLongJump() override;
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static constexpr size_t kPC = kNumberOfXRegisters;
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private:
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// Pointers to register locations, initialized to null or the specific registers below. We need
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// an additional one for the PC.
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uintptr_t* gprs_[kNumberOfXRegisters + 1];
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uint64_t * fprs_[kNumberOfDRegisters];
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// Hold values for sp, pc and arg0 if they are not located within a stack frame.
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uintptr_t sp_, pc_, arg0_;
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};
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} // namespace arm64
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} // namespace art
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#endif // ART_RUNTIME_ARCH_ARM64_CONTEXT_ARM64_H_
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