1 /*
2 * Copyright (C) 2015 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 #include "simulator/code_simulator_arm64.h"
18
19 #include "base/logging.h"
20
21 using namespace vixl::aarch64; // NOLINT(build/namespaces)
22
23 namespace art {
24 namespace arm64 {
25
26 // VIXL has not been tested on 32bit architectures, so Simulator is not always
27 // available. To avoid linker error on these architectures, we check if we can simulate
28 // in the beginning of following methods, with compile time constant `kCanSimulate`.
29 // TODO: when Simulator is always available, remove the these checks.
30
CreateCodeSimulatorArm64()31 CodeSimulatorArm64* CodeSimulatorArm64::CreateCodeSimulatorArm64() {
32 if (kCanSimulate) {
33 return new CodeSimulatorArm64();
34 } else {
35 return nullptr;
36 }
37 }
38
CodeSimulatorArm64()39 CodeSimulatorArm64::CodeSimulatorArm64()
40 : CodeSimulator(), decoder_(nullptr), simulator_(nullptr) {
41 DCHECK(kCanSimulate);
42 decoder_ = new Decoder();
43 simulator_ = new Simulator(decoder_);
44 }
45
~CodeSimulatorArm64()46 CodeSimulatorArm64::~CodeSimulatorArm64() {
47 DCHECK(kCanSimulate);
48 delete simulator_;
49 delete decoder_;
50 }
51
RunFrom(intptr_t code_buffer)52 void CodeSimulatorArm64::RunFrom(intptr_t code_buffer) {
53 DCHECK(kCanSimulate);
54 simulator_->RunFrom(reinterpret_cast<const Instruction*>(code_buffer));
55 }
56
GetCReturnBool() const57 bool CodeSimulatorArm64::GetCReturnBool() const {
58 DCHECK(kCanSimulate);
59 return simulator_->ReadWRegister(0);
60 }
61
GetCReturnInt32() const62 int32_t CodeSimulatorArm64::GetCReturnInt32() const {
63 DCHECK(kCanSimulate);
64 return simulator_->ReadWRegister(0);
65 }
66
GetCReturnInt64() const67 int64_t CodeSimulatorArm64::GetCReturnInt64() const {
68 DCHECK(kCanSimulate);
69 return simulator_->ReadXRegister(0);
70 }
71
72 } // namespace arm64
73 } // namespace art
74