fa00dfda13
Proposal for adding SHT_RELR sections in the generic-abi is at https://groups.google.com/forum/#!topic/generic-abi/bX460iggiKg Comparison with relocation_packer for aosp_marlin-userdebug: $ du -B1 -s */out/target/product/marlin/system 996958208 base/out/target/product/marlin/system 1008340992 no_pack/out/target/product/marlin/system 997801984 sht_relr/out/target/product/marlin/system base contains a build with current settings. no_pack contains a build with relocation_packer disabled. sht_relr contains a build with SHT_RELR sections enabled. relocation_packer was saving 11,382,784 bytes (no_pack - base). SHT_RELR sections are saving 10,539,008 bytes (no_pack - sht_relr). Bug: None Test: Built aosp_marlin-userdebug image, boots on device. Test: Built aosp_x86_64-userdebug image, boots in emulator. Change-Id: I448dc95baa4976b68ce2659b80498539426775f9
92 lines
2.6 KiB
Go
92 lines
2.6 KiB
Go
// Copyright 2016 Google Inc. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package cc
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import (
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"runtime"
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"github.com/google/blueprint"
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"android/soong/android"
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)
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func init() {
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pctx.SourcePathVariable("relocationPackerCmd", "prebuilts/misc/${config.HostPrebuiltTag}/relocation_packer/relocation_packer")
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}
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var relocationPackerRule = pctx.AndroidStaticRule("packRelocations",
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blueprint.RuleParams{
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Command: "rm -f $out && cp $in $out && $relocationPackerCmd $out",
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CommandDeps: []string{"$relocationPackerCmd"},
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})
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type RelocationPackerProperties struct {
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Pack_relocations *bool `android:"arch_variant"`
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// This will be true even if we're embedded in Make, in which case
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// we'll defer to make to actually do the packing.
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PackingRelocations bool `blueprint:"mutated"`
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}
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type relocationPacker struct {
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Properties RelocationPackerProperties
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}
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func (p *relocationPacker) packingInit(ctx BaseModuleContext) {
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// Disable relocation_packer and migrate to SHT_RELR sections.
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//
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// Proposal for adding SHT_RELR sections in generic-abi is at
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// https://groups.google.com/forum/#!topic/generic-abi/bX460iggiKg
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//
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// TODO: Remove relocation_packer and associated build logic.
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enabled := false
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// Relocation packer isn't available on Darwin yet
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if runtime.GOOS == "darwin" {
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enabled = false
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}
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if ctx.Target().Os != android.Android {
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enabled = false
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}
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if ctx.Config().Getenv("DISABLE_RELOCATION_PACKER") == "true" {
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enabled = false
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}
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if ctx.useSdk() {
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enabled = false
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}
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if p.Properties.Pack_relocations != nil &&
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*p.Properties.Pack_relocations == false {
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enabled = false
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}
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p.Properties.PackingRelocations = enabled
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}
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func (p *relocationPacker) needsPacking(ctx ModuleContext) bool {
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if ctx.Config().EmbeddedInMake() {
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return false
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}
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return p.Properties.PackingRelocations
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}
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func (p *relocationPacker) pack(ctx ModuleContext, in, out android.ModuleOutPath, flags builderFlags) {
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ctx.Build(pctx, android.BuildParams{
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Rule: relocationPackerRule,
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Description: "pack relocations",
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Output: out,
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Input: in,
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})
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}
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