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 #include "linkerconfig/namespacebuilder.h"
21
22 using android::linkerconfig::modules::Namespace;
23
24 namespace android {
25 namespace linkerconfig {
26 namespace contents {
BuildVndkNamespace(const Context & ctx,VndkUserPartition vndk_user)27 Namespace BuildVndkNamespace([[maybe_unused]] const Context& ctx,
28 VndkUserPartition vndk_user) {
29 bool is_system_or_unrestricted_section = ctx.IsSystemSection() ||
30 ctx.IsUnrestrictedSection();
31 if (ctx.IsApexBinaryConfig()) {
32 is_system_or_unrestricted_section = ctx.GetCurrentApex().InSystem();
33 }
34 // In the system section, we need to have an additional vndk namespace for
35 // product apps. We must have a different name "vndk_product" for this
36 // namespace. "vndk_product" namespace is used only from the native_loader for
37 // product apps.
38 const char* name;
39 if (is_system_or_unrestricted_section &&
40 vndk_user == VndkUserPartition::Product) {
41 name = "vndk_product";
42 } else {
43 name = "vndk";
44 }
45
46 // Isolated but visible when used in the [system] or [unrestricted] section to
47 // allow links to be created at runtime, e.g. through android_link_namespaces
48 // in libnativeloader. Otherwise it isn't isolated, so visibility doesn't
49 // matter.
50 Namespace ns(name,
51 /*is_isolated=*/ctx.IsSystemSection() || ctx.IsApexBinaryConfig(),
52 /*is_visible=*/is_system_or_unrestricted_section);
53
54 std::vector<std::string> lib_paths;
55 std::string vndk_version;
56 if (vndk_user == VndkUserPartition::Product) {
57 lib_paths = {Var("PRODUCT") + "/${LIB}"};
58 vndk_version = Var("PRODUCT_VNDK_VERSION");
59 } else {
60 // default for vendor
61 lib_paths = {"/odm/${LIB}", "/vendor/${LIB}"};
62 vndk_version = Var("VENDOR_VNDK_VERSION");
63 }
64
65 // Search order:
66 // 1. VNDK Extensions
67 // 2. VNDK APEX
68 // 3. vendor/lib or product/lib to allow extensions to use them
69
70 // 1. VNDK Extensions
71 for (const auto& lib_path : lib_paths) {
72 ns.AddSearchPath(lib_path + "/vndk-sp");
73 if (!is_system_or_unrestricted_section) {
74 ns.AddSearchPath(lib_path + "/vndk");
75 }
76 }
77
78 // 2. VNDK APEX
79 ns.AddSearchPath("/apex/com.android.vndk.v" + vndk_version + "/${LIB}");
80
81 if (is_system_or_unrestricted_section &&
82 vndk_user == VndkUserPartition::Vendor) {
83 // It is for vendor sp-hal
84 ns.AddPermittedPath("/odm/${LIB}/hw");
85 ns.AddPermittedPath("/odm/${LIB}/egl");
86 ns.AddPermittedPath("/vendor/${LIB}/hw");
87 ns.AddPermittedPath("/vendor/${LIB}/egl");
88 ns.AddPermittedPath("/system/vendor/${LIB}/hw");
89 ns.AddPermittedPath("/system/vendor/${LIB}/egl");
90
91 // This is exceptionally required since android.hidl.memory@1.0-impl.so is here
92 ns.AddPermittedPath("/apex/com.android.vndk.v" +
93 Var("VENDOR_VNDK_VERSION") + "/${LIB}/hw");
94 }
95
96 // 3. vendor/lib or product/lib
97 for (const auto& lib_path : lib_paths) {
98 ns.AddSearchPath(lib_path);
99 }
100
101 // For the non-system section, the links should be identical to that of the
102 // 'vndk_in_system' namespace, except the links to 'default' and 'vndk_in_system'.
103 if (vndk_user == VndkUserPartition::Product) {
104 ns.GetLink(ctx.GetSystemNamespaceName())
105 .AddSharedLib({Var("LLNDK_LIBRARIES_PRODUCT")});
106 } else {
107 ns.GetLink(ctx.GetSystemNamespaceName())
108 .AddSharedLib({Var("LLNDK_LIBRARIES_VENDOR")});
109 }
110
111 if (ctx.IsProductSection() || ctx.IsVendorSection()) {
112 if (android::linkerconfig::modules::IsVndkInSystemNamespace()) {
113 ns.GetLink("vndk_in_system")
114 .AddSharedLib(Var("VNDK_USING_CORE_VARIANT_LIBRARIES"));
115 }
116 }
117
118 ns.AddRequires(std::vector{"libneuralnetworks.so"});
119
120 return ns;
121 }
122 } // namespace contents
123 } // namespace linkerconfig
124 } // namespace android
125