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 static const char* const kSystemLibDir = "/system/lib64";
35 static const char* const kI18nApexLibDir = "/apex/com.android.i18n/lib64";
36 #else
37 static const char* const kSystemLibDir = "/system/lib";
38 static const char* const kI18nApexLibDir = "/apex/com.android.i18n/lib";
39 #endif
40
41 // Workaround for dlopen(/system/lib(64)/<soname>) when .so is in /apex. http://b/121248172
42 /**
43 * Translate /system path to /apex path if needed
44 * The workaround should work only when targetSdkVersion < Q.
45 *
46 * param out_name_to_apex pointing to /apex path
47 * return true if translation is needed
48 */
translateSystemPathToApexPath(const char * name,std::string * out_name_to_apex)49 bool translateSystemPathToApexPath(const char* name, std::string* out_name_to_apex) {
50 static const char* const kSystemToArtApexLibs[] = {
51 "libicuuc.so",
52 "libicui18n.so",
53 };
54 // New mapping for new apex should be added below
55
56 // Nothing to do if target sdk version is Q or above
57 if (get_application_target_sdk_version() >= 29) {
58 return false;
59 }
60
61 // If the path isn't /system/lib, there's nothing to do.
62 if (name == nullptr || dirname(name) != kSystemLibDir) {
63 return false;
64 }
65
66 const char* base_name = basename(name);
67
68 for (const char* soname : kSystemToArtApexLibs) {
69 if (strcmp(base_name, soname) == 0) {
70 *out_name_to_apex = std::string(kI18nApexLibDir) + "/" + base_name;
71 return true;
72 }
73 }
74
75 return false;
76 }
77 // End Workaround for dlopen(/system/lib/<soname>) when .so is in /apex.
78