1 /*
2 * Copyright (C) 2020 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 <dlfcn.h>
18
19 #include "chre/platform/assert.h"
20 #include "chre/platform/shared/nanoapp_loader.h"
21 #include "chre/util/unique_ptr.h"
22
dlopenbuf(void * elfBinary,bool mapIntoTcm)23 void *dlopenbuf(void *elfBinary, bool mapIntoTcm) {
24 return chre::NanoappLoader::create(elfBinary, mapIntoTcm);
25 }
26
dlsym(void * handle,const char * symbol)27 void *dlsym(void *handle, const char *symbol) {
28 LOGV("Attempting to find %s", symbol);
29
30 void *resolvedSymbol = nullptr;
31 if (handle == RTLD_NEXT) {
32 resolvedSymbol = chre::NanoappLoader::findExportedSymbol(symbol);
33 } else if (handle != nullptr) {
34 auto *loader = reinterpret_cast<chre::NanoappLoader *>(handle);
35 resolvedSymbol = loader->findSymbolByName(symbol);
36 }
37
38 if (resolvedSymbol == nullptr) {
39 LOGE("dlsym unable to resolve %s", symbol);
40 } else {
41 LOGV("Found symbol at %p", resolvedSymbol);
42 }
43
44 return resolvedSymbol;
45 }
46
dlclose(void * handle)47 int dlclose(void *handle) {
48 int rv = -1;
49
50 if (handle != nullptr) {
51 chre::NanoappLoader::destroy(static_cast<chre::NanoappLoader *>(handle));
52 rv = 0;
53 }
54
55 return rv;
56 }
57
dlerror()58 const char *dlerror() {
59 return "Shared library load failed";
60 }
61