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 "code_simulator_arm64.h"
18
19 #include <android-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
44 SimStack stack_builder;
45 stack_builder.SetLimitGuardSize(0x4000);
46 stack_builder.SetUsableSize(0x4000);
47 SimStack::Allocated stack = stack_builder.Allocate();
48
49 simulator_ = new Simulator(decoder_, stdout, std::move(stack));
50 }
51
~CodeSimulatorArm64()52 CodeSimulatorArm64::~CodeSimulatorArm64() {
53 DCHECK(kCanSimulate);
54 delete simulator_;
55 delete decoder_;
56 }
57
RunFrom(intptr_t code_buffer)58 void CodeSimulatorArm64::RunFrom(intptr_t code_buffer) {
59 DCHECK(kCanSimulate);
60 simulator_->RunFrom(reinterpret_cast<const Instruction*>(code_buffer));
61 }
62
GetCReturnBool() const63 bool CodeSimulatorArm64::GetCReturnBool() const {
64 DCHECK(kCanSimulate);
65 return simulator_->ReadWRegister(0);
66 }
67
GetCReturnInt32() const68 int32_t CodeSimulatorArm64::GetCReturnInt32() const {
69 DCHECK(kCanSimulate);
70 return simulator_->ReadWRegister(0);
71 }
72
GetCReturnInt64() const73 int64_t CodeSimulatorArm64::GetCReturnInt64() const {
74 DCHECK(kCanSimulate);
75 return simulator_->ReadXRegister(0);
76 }
77
78 } // namespace arm64
79 } // namespace art
80