1 /*
2 * Copyright (C) 2023 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 "berberis/runtime_primitives/known_guest_function_wrapper.h"
18
19 #include <map>
20 #include <mutex>
21 #include <string>
22
23 #include "berberis/guest_state/guest_addr.h"
24 #include "berberis/runtime_primitives/host_code.h"
25
26 namespace berberis {
27
28 namespace {
29
30 std::map<std::string, HostCode (*)(GuestAddr)> g_function_wrappers;
31 std::mutex g_guard_mutex;
32
33 } // namespace
34
RegisterKnownGuestFunctionWrapper(const char * name,HostCode (* wrapper)(GuestAddr))35 void RegisterKnownGuestFunctionWrapper(const char* name, HostCode (*wrapper)(GuestAddr)) {
36 std::lock_guard<std::mutex> guard(g_guard_mutex);
37 g_function_wrappers.insert({name, wrapper});
38 }
39
WrapKnownGuestFunction(GuestAddr guest_addr,const char * name)40 HostCode WrapKnownGuestFunction(GuestAddr guest_addr, const char* name) {
41 std::lock_guard<std::mutex> guard(g_guard_mutex);
42 auto wrapper = g_function_wrappers.find(name);
43 if (wrapper == end(g_function_wrappers)) {
44 return nullptr;
45 }
46 return wrapper->second(guest_addr);
47 }
48
49 }; // namespace berberis
50