1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
|
// Copyright (C) 2021 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package filesystem
import (
"android/soong/android"
"android/soong/linkerconfig"
)
type systemImage struct {
filesystem
properties systemImageProperties
}
type systemImageProperties struct {
// Path to the input linker config json file.
Linker_config_src *string
}
// android_system_image is a specialization of android_filesystem for the 'system' partition.
// Currently, the only difference is the inclusion of linker.config.pb file which specifies
// the provided and the required libraries to and from APEXes.
func systemImageFactory() android.Module {
module := &systemImage{}
module.AddProperties(&module.properties)
module.filesystem.buildExtraFiles = module.buildExtraFiles
module.filesystem.filterPackagingSpec = module.filterPackagingSpec
initFilesystemModule(&module.filesystem)
return module
}
func (s *systemImage) buildExtraFiles(ctx android.ModuleContext, root android.OutputPath) android.OutputPaths {
if s.filesystem.properties.Partition_type != nil {
ctx.PropertyErrorf("partition_type", "partition_type must be unset on an android_system_image module. It is assumed to be 'system'.")
}
lc := s.buildLinkerConfigFile(ctx, root)
// Add more files if needed
return []android.OutputPath{lc}
}
func (s *systemImage) buildLinkerConfigFile(ctx android.ModuleContext, root android.OutputPath) android.OutputPath {
input := android.PathForModuleSrc(ctx, android.String(s.properties.Linker_config_src))
output := root.Join(ctx, "system", "etc", "linker.config.pb")
// we need "Module"s for packaging items
modulesInPackageByModule := make(map[android.Module]bool)
modulesInPackageByName := make(map[string]bool)
deps := s.gatherFilteredPackagingSpecs(ctx)
ctx.WalkDeps(func(child, parent android.Module) bool {
for _, ps := range child.PackagingSpecs() {
if _, ok := deps[ps.RelPathInPackage()]; ok {
modulesInPackageByModule[child] = true
modulesInPackageByName[child.Name()] = true
return true
}
}
return true
})
provideModules := make([]android.Module, 0, len(modulesInPackageByModule))
for mod := range modulesInPackageByModule {
provideModules = append(provideModules, mod)
}
var requireModules []android.Module
ctx.WalkDeps(func(child, parent android.Module) bool {
_, parentInPackage := modulesInPackageByModule[parent]
_, childInPackageName := modulesInPackageByName[child.Name()]
// When parent is in the package, and child (or its variant) is not, this can be from an interface.
if parentInPackage && !childInPackageName {
requireModules = append(requireModules, child)
}
return true
})
builder := android.NewRuleBuilder(pctx, ctx)
linkerconfig.BuildLinkerConfig(ctx, builder, input, provideModules, requireModules, output)
builder.Build("conv_linker_config", "Generate linker config protobuf "+output.String())
return output
}
// Filter the result of GatherPackagingSpecs to discard items targeting outside "system" partition.
// Note that "apex" module installs its contents to "apex"(fake partition) as well
// for symbol lookup by imitating "activated" paths.
func (s *systemImage) filterPackagingSpec(ps android.PackagingSpec) bool {
return ps.Partition() == "system"
}
|
