1 /*
2 * Copyright (C) 2019 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 // This namespace is exclusively for vndk-sp libs.
18
19 #include "linkerconfig/environment.h"
20
21 #include <android-base/strings.h>
22
23 #include "linkerconfig/namespacebuilder.h"
24
25 using android::linkerconfig::modules::Namespace;
26
27 namespace android {
28 namespace linkerconfig {
29 namespace contents {
BuildVndkNamespace(const Context & ctx,VndkUserPartition vndk_user)30 Namespace BuildVndkNamespace([[maybe_unused]] const Context& ctx,
31 VndkUserPartition vndk_user) {
32 bool is_system_or_unrestricted_section = ctx.IsSystemSection() ||
33 ctx.IsUnrestrictedSection();
34 if (ctx.IsApexBinaryConfig()) {
35 is_system_or_unrestricted_section = ctx.GetCurrentApex().InSystem();
36 }
37 // In the system section, we need to have an additional vndk namespace for
38 // product apps. We must have a different name "vndk_product" for this
39 // namespace. "vndk_product" namespace is used only from the native_loader for
40 // product apps.
41 const char* name;
42 if (is_system_or_unrestricted_section &&
43 vndk_user == VndkUserPartition::Product) {
44 name = "vndk_product";
45 } else {
46 name = "vndk";
47 }
48
49 // Isolated and visible when used in the [system] or [unrestricted] section to
50 // allow links to be created at runtime, e.g. through android_link_namespaces
51 // in libnativeloader. Otherwise namespace should be isolated but not visible
52 // so namespace itself keep strict and links would not be modified at runtime.
53 Namespace ns(name,
54 /*is_isolated=*/true,
55 /*is_visible=*/is_system_or_unrestricted_section);
56
57 std::vector<std::string> lib_paths;
58 std::string vndk_version;
59 if (vndk_user == VndkUserPartition::Product) {
60 lib_paths = {Var("PRODUCT") + "/${LIB}"};
61 vndk_version = Var("PRODUCT_VNDK_VERSION");
62 } else {
63 // default for vendor
64 lib_paths = {"/odm/${LIB}", "/vendor/${LIB}"};
65 vndk_version = Var("VENDOR_VNDK_VERSION");
66 }
67
68 // Search order:
69 // 1. VNDK Extensions
70 // 2. VNDK APEX
71 // 3. vendor/lib or product/lib to allow extensions to use them
72
73 // 1. VNDK Extensions
74 for (const auto& lib_path : lib_paths) {
75 ns.AddSearchPath(lib_path + "/vndk-sp");
76 if (!is_system_or_unrestricted_section) {
77 ns.AddSearchPath(lib_path + "/vndk");
78 }
79 }
80
81 // 2. VNDK APEX
82 ns.AddSearchPath("/apex/com.android.vndk.v" + vndk_version + "/${LIB}");
83
84 if (vndk_user == VndkUserPartition::Vendor) {
85 // It is for vendor sp-hal
86 ns.AddPermittedPath("/odm/${LIB}/hw");
87 ns.AddPermittedPath("/odm/${LIB}/egl");
88 ns.AddPermittedPath("/vendor/${LIB}/hw");
89 ns.AddPermittedPath("/vendor/${LIB}/egl");
90 ns.AddPermittedPath("/system/vendor/${LIB}/hw");
91 ns.AddPermittedPath("/system/vendor/${LIB}/egl");
92
93 // This is exceptionally required since [email protected] is here
94 ns.AddPermittedPath("/apex/com.android.vndk.v" +
95 Var("VENDOR_VNDK_VERSION") + "/${LIB}/hw");
96 }
97
98 // 3. vendor/lib or product/lib
99 if (is_system_or_unrestricted_section || ctx.IsApexBinaryConfig()) {
100 // Add (vendor|product)/lib for cases (vendor|product) namespace does not exist.
101 for (const auto& lib_path : lib_paths) {
102 ns.AddSearchPath(lib_path);
103 }
104 } else {
105 // To avoid double loading library issue, add link to the default
106 // namespace instead of adding search path.
107 ns.GetLink("default").AllowAllSharedLibs();
108 }
109
110 AddLlndkLibraries(ctx, &ns, vndk_user);
111
112 if (ctx.IsProductSection() || ctx.IsVendorSection()) {
113 if (android::linkerconfig::modules::IsVndkInSystemNamespace()) {
114 ns.GetLink("vndk_in_system")
115 .AddSharedLib(Var("VNDK_USING_CORE_VARIANT_LIBRARIES"));
116 }
117 }
118
119 return ns;
120 }
121 } // namespace contents
122 } // namespace linkerconfig
123 } // namespace android
124