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 namespace art {
20 namespace arm64 {
21
22 // VIXL has not been tested on 32bit architectures, so vixl::Simulator is not always
23 // available. To avoid linker error on these architectures, we check if we can simulate
24 // in the beginning of following methods, with compile time constant `kCanSimulate`.
25 // TODO: when vixl::Simulator is always available, remove the these checks.
26
CreateCodeSimulatorArm64()27 CodeSimulatorArm64* CodeSimulatorArm64::CreateCodeSimulatorArm64() {
28 if (kCanSimulate) {
29 return new CodeSimulatorArm64();
30 } else {
31 return nullptr;
32 }
33 }
34
CodeSimulatorArm64()35 CodeSimulatorArm64::CodeSimulatorArm64()
36 : CodeSimulator(), decoder_(nullptr), simulator_(nullptr) {
37 DCHECK(kCanSimulate);
38 decoder_ = new vixl::Decoder();
39 simulator_ = new vixl::Simulator(decoder_);
40 }
41
~CodeSimulatorArm64()42 CodeSimulatorArm64::~CodeSimulatorArm64() {
43 DCHECK(kCanSimulate);
44 delete simulator_;
45 delete decoder_;
46 }
47
RunFrom(intptr_t code_buffer)48 void CodeSimulatorArm64::RunFrom(intptr_t code_buffer) {
49 DCHECK(kCanSimulate);
50 simulator_->RunFrom(reinterpret_cast<const vixl::Instruction*>(code_buffer));
51 }
52
GetCReturnBool() const53 bool CodeSimulatorArm64::GetCReturnBool() const {
54 DCHECK(kCanSimulate);
55 return simulator_->wreg(0);
56 }
57
GetCReturnInt32() const58 int32_t CodeSimulatorArm64::GetCReturnInt32() const {
59 DCHECK(kCanSimulate);
60 return simulator_->wreg(0);
61 }
62
GetCReturnInt64() const63 int64_t CodeSimulatorArm64::GetCReturnInt64() const {
64 DCHECK(kCanSimulate);
65 return simulator_->xreg(0);
66 }
67
68 } // namespace arm64
69 } // namespace art
70