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