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1// Copyright 2017 Google Inc. All rights reserved.
2//
3// Licensed under the Apache License, Version 2.0 (the "License");
4// you may not use this file except in compliance with the License.
5// You may obtain a copy of the License at
6//
7//     http://www.apache.org/licenses/LICENSE-2.0
8//
9// Unless required by applicable law or agreed to in writing, software
10// distributed under the License is distributed on an "AS IS" BASIS,
11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12// See the License for the specific language governing permissions and
13// limitations under the License.
14
15package cc
16
17import (
18	"strings"
19
20	"android/soong/android"
21)
22
23var (
24	vndkSuffix     = ".vndk."
25	binder32Suffix = ".binder32"
26)
27
28// Creates vndk prebuilts that include the VNDK version.
29//
30// Example:
31//
32// vndk_prebuilt_shared {
33//     name: "libfoo",
34//     version: "27.1.0",
35//     vendor_available: true,
36//     vndk: {
37//         enabled: true,
38//     },
39//     export_include_dirs: ["include/external/libfoo/vndk_include"],
40//     arch: {
41//         arm64: {
42//             srcs: ["arm/lib64/libfoo.so"],
43//         },
44//         arm: {
45//             srcs: ["arm/lib/libfoo.so"],
46//         },
47//     },
48// }
49//
50type vndkPrebuiltProperties struct {
51	// VNDK snapshot version.
52	Version *string
53
54	// Target arch name of the snapshot (e.g. 'arm64' for variant 'aosp_arm64_ab')
55	Target_arch *string
56
57	// If the prebuilt snapshot lib is built with 32 bit binder, this must be set to true.
58	// The lib with 64 bit binder does not need to set this property.
59	Binder32bit *bool
60
61	// Prebuilt files for each arch.
62	Srcs []string `android:"arch_variant"`
63
64	// Check the prebuilt ELF files (e.g. DT_SONAME, DT_NEEDED, resolution of undefined symbols,
65	// etc).
66	Check_elf_files *bool
67}
68
69type vndkPrebuiltLibraryDecorator struct {
70	*libraryDecorator
71	properties vndkPrebuiltProperties
72}
73
74func (p *vndkPrebuiltLibraryDecorator) Name(name string) string {
75	return name + p.NameSuffix()
76}
77
78func (p *vndkPrebuiltLibraryDecorator) NameSuffix() string {
79	suffix := p.version()
80	if p.arch() != "" {
81		suffix += "." + p.arch()
82	}
83	if Bool(p.properties.Binder32bit) {
84		suffix += binder32Suffix
85	}
86	return vndkSuffix + suffix
87}
88
89func (p *vndkPrebuiltLibraryDecorator) version() string {
90	return String(p.properties.Version)
91}
92
93func (p *vndkPrebuiltLibraryDecorator) arch() string {
94	return String(p.properties.Target_arch)
95}
96
97func (p *vndkPrebuiltLibraryDecorator) binderBit() string {
98	if Bool(p.properties.Binder32bit) {
99		return "32"
100	}
101	return "64"
102}
103
104func (p *vndkPrebuiltLibraryDecorator) linkerFlags(ctx ModuleContext, flags Flags) Flags {
105	p.libraryDecorator.libName = strings.TrimSuffix(ctx.ModuleName(), p.NameSuffix())
106	return p.libraryDecorator.linkerFlags(ctx, flags)
107}
108
109func (p *vndkPrebuiltLibraryDecorator) singleSourcePath(ctx ModuleContext) android.Path {
110	if len(p.properties.Srcs) == 0 {
111		ctx.PropertyErrorf("srcs", "missing prebuilt source file")
112		return nil
113	}
114
115	if len(p.properties.Srcs) > 1 {
116		ctx.PropertyErrorf("srcs", "multiple prebuilt source files")
117		return nil
118	}
119
120	return android.PathForModuleSrc(ctx, p.properties.Srcs[0])
121}
122
123func (p *vndkPrebuiltLibraryDecorator) link(ctx ModuleContext,
124	flags Flags, deps PathDeps, objs Objects) android.Path {
125	if len(p.properties.Srcs) > 0 && p.shared() {
126		// current VNDK prebuilts are only shared libs.
127		return p.singleSourcePath(ctx)
128	}
129	return nil
130}
131
132func (p *vndkPrebuiltLibraryDecorator) install(ctx ModuleContext, file android.Path) {
133	arches := ctx.DeviceConfig().Arches()
134	if len(arches) == 0 || arches[0].ArchType.String() != p.arch() {
135		return
136	}
137	if ctx.DeviceConfig().BinderBitness() != p.binderBit() {
138		return
139	}
140	if p.shared() {
141		if ctx.isVndkSp() {
142			p.baseInstaller.subDir = "vndk-sp-" + p.version()
143		} else if ctx.isVndk() {
144			p.baseInstaller.subDir = "vndk-" + p.version()
145		}
146		p.baseInstaller.install(ctx, file)
147	}
148}
149
150func vndkPrebuiltSharedLibrary() *Module {
151	module, library := NewLibrary(android.DeviceSupported)
152	library.BuildOnlyShared()
153	module.stl = nil
154	module.sanitize = nil
155	library.StripProperties.Strip.None = BoolPtr(true)
156	module.Properties.UseVndk = true
157
158	prebuilt := &vndkPrebuiltLibraryDecorator{
159		libraryDecorator: library,
160	}
161
162	prebuilt.properties.Check_elf_files = BoolPtr(false)
163
164	module.compiler = nil
165	module.linker = prebuilt
166	module.installer = prebuilt
167
168	module.AddProperties(
169		&prebuilt.properties,
170	)
171
172	return module
173}
174
175func vndkPrebuiltSharedFactory() android.Module {
176	module := vndkPrebuiltSharedLibrary()
177	return module.Init()
178}
179
180func init() {
181	android.RegisterModuleType("vndk_prebuilt_shared", vndkPrebuiltSharedFactory)
182}
183