123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170 |
- // 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 kernel
- import (
- "fmt"
- "path/filepath"
- "strings"
- "android/soong/android"
- _ "android/soong/cc/config"
- "github.com/google/blueprint"
- "github.com/google/blueprint/proptools"
- )
- func init() {
- pctx.Import("android/soong/cc/config")
- registerKernelBuildComponents(android.InitRegistrationContext)
- }
- func registerKernelBuildComponents(ctx android.RegistrationContext) {
- ctx.RegisterModuleType("prebuilt_kernel_modules", prebuiltKernelModulesFactory)
- }
- type prebuiltKernelModules struct {
- android.ModuleBase
- properties prebuiltKernelModulesProperties
- installDir android.InstallPath
- }
- type prebuiltKernelModulesProperties struct {
- // List or filegroup of prebuilt kernel module files. Should have .ko suffix.
- Srcs []string `android:"path,arch_variant"`
- // Kernel version that these modules are for. Kernel modules are installed to
- // /lib/modules/<kernel_version> directory in the corresponding partition. Default is "".
- Kernel_version *string
- }
- // prebuilt_kernel_modules installs a set of prebuilt kernel module files to the correct directory.
- // In addition, this module builds modules.load, modules.dep, modules.softdep and modules.alias
- // using depmod and installs them as well.
- func prebuiltKernelModulesFactory() android.Module {
- module := &prebuiltKernelModules{}
- module.AddProperties(&module.properties)
- android.InitAndroidArchModule(module, android.DeviceSupported, android.MultilibFirst)
- return module
- }
- func (pkm *prebuiltKernelModules) KernelVersion() string {
- return proptools.StringDefault(pkm.properties.Kernel_version, "")
- }
- func (pkm *prebuiltKernelModules) DepsMutator(ctx android.BottomUpMutatorContext) {
- // do nothing
- }
- func (pkm *prebuiltKernelModules) GenerateAndroidBuildActions(ctx android.ModuleContext) {
- modules := android.PathsForModuleSrc(ctx, pkm.properties.Srcs)
- depmodOut := runDepmod(ctx, modules)
- strippedModules := stripDebugSymbols(ctx, modules)
- installDir := android.PathForModuleInstall(ctx, "lib", "modules")
- if pkm.KernelVersion() != "" {
- installDir = installDir.Join(ctx, pkm.KernelVersion())
- }
- for _, m := range strippedModules {
- ctx.InstallFile(installDir, filepath.Base(m.String()), m)
- }
- ctx.InstallFile(installDir, "modules.load", depmodOut.modulesLoad)
- ctx.InstallFile(installDir, "modules.dep", depmodOut.modulesDep)
- ctx.InstallFile(installDir, "modules.softdep", depmodOut.modulesSoftdep)
- ctx.InstallFile(installDir, "modules.alias", depmodOut.modulesAlias)
- }
- var (
- pctx = android.NewPackageContext("android/soong/kernel")
- stripRule = pctx.AndroidStaticRule("strip",
- blueprint.RuleParams{
- Command: "$stripCmd -o $out --strip-debug $in",
- CommandDeps: []string{"$stripCmd"},
- }, "stripCmd")
- )
- func stripDebugSymbols(ctx android.ModuleContext, modules android.Paths) android.OutputPaths {
- dir := android.PathForModuleOut(ctx, "stripped").OutputPath
- var outputs android.OutputPaths
- for _, m := range modules {
- stripped := dir.Join(ctx, filepath.Base(m.String()))
- ctx.Build(pctx, android.BuildParams{
- Rule: stripRule,
- Input: m,
- Output: stripped,
- Args: map[string]string{
- "stripCmd": "${config.ClangBin}/llvm-strip",
- },
- })
- outputs = append(outputs, stripped)
- }
- return outputs
- }
- type depmodOutputs struct {
- modulesLoad android.OutputPath
- modulesDep android.OutputPath
- modulesSoftdep android.OutputPath
- modulesAlias android.OutputPath
- }
- func runDepmod(ctx android.ModuleContext, modules android.Paths) depmodOutputs {
- baseDir := android.PathForModuleOut(ctx, "depmod").OutputPath
- fakeVer := "0.0" // depmod demands this anyway
- modulesDir := baseDir.Join(ctx, "lib", "modules", fakeVer)
- builder := android.NewRuleBuilder(pctx, ctx)
- // Copy the module files to a temporary dir
- builder.Command().Text("rm").Flag("-rf").Text(modulesDir.String())
- builder.Command().Text("mkdir").Flag("-p").Text(modulesDir.String())
- for _, m := range modules {
- builder.Command().Text("cp").Input(m).Text(modulesDir.String())
- }
- // Enumerate modules to load
- modulesLoad := modulesDir.Join(ctx, "modules.load")
- var basenames []string
- for _, m := range modules {
- basenames = append(basenames, filepath.Base(m.String()))
- }
- builder.Command().
- Text("echo").Flag("\"" + strings.Join(basenames, " ") + "\"").
- Text("|").Text("tr").Flag("\" \"").Flag("\"\\n\"").
- Text(">").Output(modulesLoad)
- // Run depmod to build modules.dep/softdep/alias files
- modulesDep := modulesDir.Join(ctx, "modules.dep")
- modulesSoftdep := modulesDir.Join(ctx, "modules.softdep")
- modulesAlias := modulesDir.Join(ctx, "modules.alias")
- builder.Command().
- BuiltTool("depmod").
- FlagWithArg("-b ", baseDir.String()).
- Text(fakeVer).
- ImplicitOutput(modulesDep).
- ImplicitOutput(modulesSoftdep).
- ImplicitOutput(modulesAlias)
- builder.Build("depmod", fmt.Sprintf("depmod %s", ctx.ModuleName()))
- return depmodOutputs{modulesLoad, modulesDep, modulesSoftdep, modulesAlias}
- }
|