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// Copyright (C) 2020 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 linkerconfig
import (
"sort"
"strings"
"github.com/google/blueprint/proptools"
"android/soong/android"
"android/soong/cc"
"android/soong/etc"
)
var (
pctx = android.NewPackageContext("android/soong/linkerconfig")
)
func init() {
pctx.HostBinToolVariable("conv_linker_config", "conv_linker_config")
registerLinkerConfigBuildComponent(android.InitRegistrationContext)
}
func registerLinkerConfigBuildComponent(ctx android.RegistrationContext) {
ctx.RegisterModuleType("linker_config", LinkerConfigFactory)
}
type linkerConfigProperties struct {
// source linker configuration property file
Src *string `android:"path"`
// If set to true, allow module to be installed to one of the partitions.
// Default value is true.
// Installable should be marked as false for APEX configuration to avoid
// conflicts of configuration on /system/etc directory.
Installable *bool
}
type linkerConfig struct {
android.ModuleBase
properties linkerConfigProperties
outputFilePath android.OutputPath
installDirPath android.InstallPath
}
// Implement PrebuiltEtcModule interface to fit in APEX prebuilt list.
var _ etc.PrebuiltEtcModule = (*linkerConfig)(nil)
func (l *linkerConfig) BaseDir() string {
return "etc"
}
func (l *linkerConfig) SubDir() string {
return ""
}
func (l *linkerConfig) OutputFile() android.OutputPath {
return l.outputFilePath
}
func (l *linkerConfig) GenerateAndroidBuildActions(ctx android.ModuleContext) {
input := android.PathForModuleSrc(ctx, android.String(l.properties.Src))
output := android.PathForModuleOut(ctx, "linker.config.pb").OutputPath
BuildLinkerConfig(ctx, android.Paths{input}, nil, nil, output)
l.outputFilePath = output
l.installDirPath = android.PathForModuleInstall(ctx, "etc")
if !proptools.BoolDefault(l.properties.Installable, true) {
l.SkipInstall()
}
ctx.InstallFile(l.installDirPath, l.outputFilePath.Base(), l.outputFilePath)
ctx.SetOutputFiles(android.Paths{l.outputFilePath}, "")
etc.SetCommonPrebuiltEtcInfo(ctx, l)
}
func BuildLinkerConfig(
ctx android.ModuleContext,
inputs android.Paths,
provideModules []android.ModuleProxy,
requireModules []android.ModuleProxy,
output android.WritablePath,
) {
// First, convert the input json to protobuf format
builder := android.NewRuleBuilder(pctx, ctx)
interimOutput := android.PathForModuleOut(ctx, "temp.pb")
cmd := builder.Command().
BuiltTool("conv_linker_config").
Flag("proto").
Flag("--force")
for _, input := range inputs {
cmd.FlagWithInput("-s ", input)
}
cmd.FlagWithOutput("-o ", interimOutput)
// Secondly, if there's provideLibs gathered from provideModules, append them
var provideLibs []string
for _, m := range provideModules {
ccInfo, ok := android.OtherModuleProvider(ctx, m, cc.CcInfoProvider)
if ok && (cc.IsStubTarget(android.OtherModuleProviderOrDefault(ctx, m, cc.LinkableInfoProvider)) || ccInfo.HasLlndkStubs) {
for _, ps := range android.OtherModuleProviderOrDefault(
ctx, m, android.InstallFilesProvider).PackagingSpecs {
provideLibs = append(provideLibs, ps.FileName())
}
}
}
provideLibs = android.FirstUniqueStrings(provideLibs)
sort.Strings(provideLibs)
var requireLibs []string
for _, m := range requireModules {
if _, ok := android.OtherModuleProvider(ctx, m, cc.CcInfoProvider); ok {
if android.OtherModuleProviderOrDefault(ctx, m, cc.LinkableInfoProvider).HasStubsVariants &&
!android.OtherModulePointerProviderOrDefault(ctx, m, android.CommonModuleInfoProvider).Host {
name := ctx.OtherModuleName(m)
if ccInfo, ok := android.OtherModuleProvider(ctx, m, cc.CcInfoProvider); ok && ccInfo.LinkerInfo != nil && ccInfo.LinkerInfo.ImplementationModuleName != nil {
name = *ccInfo.LinkerInfo.ImplementationModuleName
}
requireLibs = append(requireLibs, name+".so")
}
}
}
requireLibs = android.FirstUniqueStrings(requireLibs)
sort.Strings(requireLibs)
if len(provideLibs) > 0 {
prevOutput := interimOutput
interimOutput = android.PathForModuleOut(ctx, "temp_provideLibs.pb")
builder.Command().
BuiltTool("conv_linker_config").
Flag("append").
FlagWithInput("-s ", prevOutput).
FlagWithOutput("-o ", interimOutput).
FlagWithArg("--key ", "provideLibs").
FlagWithArg("--value ", proptools.ShellEscapeIncludingSpaces(strings.Join(provideLibs, " ")))
builder.Temporary(prevOutput)
}
if len(requireLibs) > 0 {
prevOutput := interimOutput
interimOutput = android.PathForModuleOut(ctx, "temp_requireLibs.pb")
builder.Command().
BuiltTool("conv_linker_config").
Flag("append").
FlagWithInput("-s ", prevOutput).
FlagWithOutput("-o ", interimOutput).
FlagWithArg("--key ", "requireLibs").
FlagWithArg("--value ", proptools.ShellEscapeIncludingSpaces(strings.Join(requireLibs, " ")))
builder.Temporary(prevOutput)
}
// cp to the final output
builder.Command().Text("cp").Input(interimOutput).Output(output)
builder.Temporary(interimOutput)
builder.DeleteTemporaryFiles()
builder.Build("conv_linker_config_"+output.String(), "Generate linker config protobuf "+output.String())
}
// linker_config generates protobuf file from json file. This protobuf file will be used from
// linkerconfig while generating ld.config.txt. Format of this file can be found from
// https://android.googlesource.com/platform/system/linkerconfig/+/main/README.md
func LinkerConfigFactory() android.Module {
m := &linkerConfig{}
m.AddProperties(&m.properties)
android.InitAndroidArchModule(m, android.HostAndDeviceSupported, android.MultilibFirst)
return m
}
func (l *linkerConfig) AndroidMkEntries() []android.AndroidMkEntries {
installable := proptools.BoolDefault(l.properties.Installable, true)
return []android.AndroidMkEntries{android.AndroidMkEntries{
Class: "ETC",
OutputFile: android.OptionalPathForPath(l.outputFilePath),
ExtraEntries: []android.AndroidMkExtraEntriesFunc{
func(ctx android.AndroidMkExtraEntriesContext, entries *android.AndroidMkEntries) {
entries.SetString("LOCAL_MODULE_PATH", l.installDirPath.String())
entries.SetString("LOCAL_INSTALLED_MODULE_STEM", l.outputFilePath.Base())
entries.SetBoolIfTrue("LOCAL_UNINSTALLABLE_MODULE", !installable)
},
},
}}
}
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