1 /*
2 * Copyright (C) 2020 The Android Open Source Project
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * * Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in
12 * the documentation and/or other materials provided with the
13 * distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #include "linker.h"
30 #include "linker_translate_path.h"
31 #include "linker_utils.h"
32
33 #if defined(__LP64__)
34 #define APEX_LIB(apex, name) \
35 { "/system/lib64/" name, "/apex/" apex "/lib64/" name }
36 #else
37 #define APEX_LIB(apex, name) \
38 { "/system/lib/" name, "/apex/" apex "/lib/" name }
39 #endif
40
41
42 // Workaround for dlopen(/system/lib(64)/<soname>) when .so is in /apex. http://b/121248172
43 /**
44 * Translate /system path to /apex path if needed
45 * The workaround should work only when targetSdkVersion < Q.
46 *
47 * param out_name_to_apex pointing to /apex path
48 * return true if translation is needed
49 */
translateSystemPathToApexPath(const char * name,std::string * out_name_to_apex)50 bool translateSystemPathToApexPath(const char* name, std::string* out_name_to_apex) {
51 static constexpr const char* kPathTranslationQ[][2] = {
52 APEX_LIB("com.android.i18n", "libicui18n.so"),
53 APEX_LIB("com.android.i18n", "libicuuc.so")
54 };
55
56 if (name == nullptr) {
57 return false;
58 }
59
60 auto comparator = [name](auto p) { return strcmp(name, p[0]) == 0; };
61
62 if (get_application_target_sdk_version() < __ANDROID_API_Q__) {
63 if (auto it =
64 std::find_if(std::begin(kPathTranslationQ), std::end(kPathTranslationQ), comparator);
65 it != std::end(kPathTranslationQ)) {
66 *out_name_to_apex = (*it)[1];
67 return true;
68 }
69 }
70
71 return false;
72 }
73 // End Workaround for dlopen(/system/lib/<soname>) when .so is in /apex.
74