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platform_build_soong
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Truncate vbmeta to 64KB 

libavb expects to be able to read the maximum vbmeta size, so we must
provide a partition which matches this or the read will fail.

Bug: 181923506
Test: m MicrodroidHostTestCases
libavb tries

Change-Id: Icc5b86ccd98e3ed9c4269e584f35dbfbdf1b0730
This commit is contained in:
Jiyong Park 2021-04-14 16:42:24 +09:00
parent ff5cc064c2
commit da2d6ee7a2
1 changed files with 10 additions and 0 deletions
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10
filesystem/vbmeta.go
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@ -110,6 +110,9 @@ func (v *vbmeta) partitionName() string {
return proptools.StringDefault(v.properties.Partition_name, v.BaseModuleName())
}
// See external/avb/libavb/avb_slot_verify.c#VBMETA_MAX_SIZE
const vbmetaMaxSize = 64 * 1024
func (v *vbmeta) GenerateAndroidBuildActions(ctx android.ModuleContext) {
extractedPublicKeys := v.extractPublicKeys(ctx)
@ -172,6 +175,13 @@ func (v *vbmeta) GenerateAndroidBuildActions(ctx android.ModuleContext) {
}
cmd.FlagWithOutput("--output ", v.output)
// libavb expects to be able to read the maximum vbmeta size, so we must provide a partition
// which matches this or the read will fail.
builder.Command().Text("truncate").
FlagWithArg("-s ", strconv.Itoa(vbmetaMaxSize)).
Output(v.output)
builder.Build("vbmeta", fmt.Sprintf("vbmeta %s", ctx.ModuleName()))
v.installDir = android.PathForModuleInstall(ctx, "etc")