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 // SP-HAL(Sameprocess-HAL)s are the only vendor libraries that are allowed to be
18 // loaded inside system processes. libEGL_<chipset>.so, libGLESv2_<chipset>.so,
19 // android.hardware.graphics.mapper@2.0-impl.so, etc are SP-HALs.
20 //
21 // This namespace is exclusivly for SP-HALs. When the framework tries to
22 // dynamically load SP-HALs, android_dlopen_ext() is used to explicitly specify
23 // that they should be searched and loaded from this namespace.
24 //
25 // Note that there is no link from the default namespace to this namespace.
26
27 #include "linkerconfig/namespacebuilder.h"
28
29 using android::linkerconfig::modules::Namespace;
30
31 namespace android {
32 namespace linkerconfig {
33 namespace contents {
BuildSphalNamespace(const Context & ctx)34 Namespace BuildSphalNamespace([[maybe_unused]] const Context& ctx) {
35 // Visible to allow use with android_dlopen_ext, and with
36 // android_link_namespaces in libnativeloader.
37 Namespace ns("sphal",
38 /*is_isolated=*/!ctx.IsUnrestrictedSection(),
39 /*is_visible=*/true);
40 ns.AddSearchPath("/odm/${LIB}");
41 ns.AddSearchPath("/vendor/${LIB}");
42 ns.AddSearchPath("/vendor/${LIB}/egl");
43 ns.AddSearchPath("/vendor/${LIB}/hw");
44
45 ns.AddPermittedPath("/odm/${LIB}");
46 ns.AddPermittedPath("/vendor/${LIB}");
47 ns.AddPermittedPath("/system/vendor/${LIB}");
48
49 if (ctx.IsApexBinaryConfig() && !ctx.IsVndkAvailable()) {
50 // If device is legacy, let Sphal libraries access to system lib path for
51 // VNDK-SP libraries
52 ns.AddSearchPath("/system/${LIB}");
53 ns.AddPermittedPath("/system/${LIB}");
54 }
55
56 if (ctx.IsApexBinaryConfig()) {
57 if (ctx.IsVndkAvailable()) {
58 ns.AddRequires(std::vector{":vndksp"});
59 ns.GetLink(ctx.GetSystemNamespaceName())
60 .AddSharedLib(Var("LLNDK_LIBRARIES_VENDOR", ""));
61 }
62 } else {
63 // Once in this namespace, access to libraries in /system/lib is restricted.
64 // Only libs listed here can be used. Order is important here as the
65 // namespaces are tried in this order. rs should be before vndk because both
66 // are capable of loading libRS_internal.so
67 if (ctx.IsSystemSection() || ctx.IsUnrestrictedSection()) {
68 ns.GetLink("rs").AddSharedLib("libRS_internal.so");
69 }
70 ns.GetLink(ctx.GetSystemNamespaceName())
71 .AddSharedLib(Var("LLNDK_LIBRARIES_VENDOR", ""));
72 ns.GetLink("vndk").AddSharedLib(
73 Var("VNDK_SAMEPROCESS_LIBRARIES_VENDOR", ""));
74 ns.AddRequires(std::vector{"libneuralnetworks.so"});
75 }
76
77 return ns;
78 }
79 } // namespace contents
80 } // namespace linkerconfig
81 } // namespace android
82