diff --git a/apex/apex.go b/apex/apex.go
index bb90cb9..d84ddb7 100644
--- a/apex/apex.go
+++ b/apex/apex.go
@@ -182,10 +182,7 @@
 	android.RegisterModuleType("apex_defaults", defaultsFactory)
 	android.RegisterModuleType("prebuilt_apex", PrebuiltFactory)
 
-	android.PreDepsMutators(func(ctx android.RegisterMutatorsContext) {
-		ctx.TopDown("apex_vndk_gather", apexVndkGatherMutator).Parallel()
-		ctx.BottomUp("apex_vndk_add_deps", apexVndkAddDepsMutator).Parallel()
-	})
+	android.PreDepsMutators(RegisterPreDepsMutators)
 	android.PostDepsMutators(RegisterPostDepsMutators)
 
 	android.RegisterMakeVarsProvider(pctx, func(ctx android.MakeVarsContext) {
@@ -195,6 +192,11 @@
 	})
 }
 
+func RegisterPreDepsMutators(ctx android.RegisterMutatorsContext) {
+	ctx.TopDown("apex_vndk", apexVndkMutator).Parallel()
+	ctx.BottomUp("apex_vndk_deps", apexVndkDepsMutator).Parallel()
+}
+
 func RegisterPostDepsMutators(ctx android.RegisterMutatorsContext) {
 	ctx.TopDown("apex_deps", apexDepsMutator)
 	ctx.BottomUp("apex", apexMutator).Parallel()
@@ -207,44 +209,39 @@
 	vndkApexListMutex sync.Mutex
 )
 
-func vndkApexList(config android.Config) map[string]*apexBundle {
+func vndkApexList(config android.Config) map[string]string {
 	return config.Once(vndkApexListKey, func() interface{} {
-		return map[string]*apexBundle{}
-	}).(map[string]*apexBundle)
+		return map[string]string{}
+	}).(map[string]string)
 }
 
-// apexVndkGatherMutator gathers "apex_vndk" modules and puts them in a map with vndk_version as a key.
-func apexVndkGatherMutator(mctx android.TopDownMutatorContext) {
+func apexVndkMutator(mctx android.TopDownMutatorContext) {
 	if ab, ok := mctx.Module().(*apexBundle); ok && ab.vndkApex {
 		if ab.IsNativeBridgeSupported() {
 			mctx.PropertyErrorf("native_bridge_supported", "%q doesn't support native bridge binary.", mctx.ModuleType())
 		}
 
-		vndkVersion := proptools.String(ab.vndkProperties.Vndk_version)
+		vndkVersion := ab.vndkVersion(mctx.DeviceConfig())
+		// Ensure VNDK APEX mount point is formatted as com.android.vndk.v###
+		ab.properties.Apex_name = proptools.StringPtr("com.android.vndk.v" + vndkVersion)
 
+		// vndk_version should be unique
 		vndkApexListMutex.Lock()
 		defer vndkApexListMutex.Unlock()
 		vndkApexList := vndkApexList(mctx.Config())
 		if other, ok := vndkApexList[vndkVersion]; ok {
-			mctx.PropertyErrorf("vndk_version", "%v is already defined in %q", vndkVersion, other.BaseModuleName())
+			mctx.PropertyErrorf("vndk_version", "%v is already defined in %q", vndkVersion, other)
 		}
-		vndkApexList[vndkVersion] = ab
+		vndkApexList[vndkVersion] = mctx.ModuleName()
 	}
 }
 
-// apexVndkAddDepsMutator adds (reverse) dependencies from vndk libs to apex_vndk modules.
-// It filters only libs with matching targets.
-func apexVndkAddDepsMutator(mctx android.BottomUpMutatorContext) {
-	if cc, ok := mctx.Module().(*cc.Module); ok && cc.IsVndkOnSystem() {
+func apexVndkDepsMutator(mctx android.BottomUpMutatorContext) {
+	if m, ok := mctx.Module().(*cc.Module); ok && cc.IsForVndkApex(mctx, m) {
+		vndkVersion := m.VndkVersion()
 		vndkApexList := vndkApexList(mctx.Config())
-		if ab, ok := vndkApexList[cc.VndkVersion()]; ok {
-			targetArch := cc.Target().String()
-			for _, target := range ab.MultiTargets() {
-				if target.String() == targetArch {
-					mctx.AddReverseDependency(mctx.Module(), sharedLibTag, ab.Name())
-					break
-				}
-			}
+		if vndkApex, ok := vndkApexList[vndkVersion]; ok {
+			mctx.AddReverseDependency(mctx.Module(), sharedLibTag, vndkApex)
 		}
 	}
 }
@@ -650,7 +647,6 @@
 }
 
 func (a *apexBundle) DepsMutator(ctx android.BottomUpMutatorContext) {
-
 	targets := ctx.MultiTargets()
 	config := ctx.DeviceConfig()
 
@@ -821,6 +817,9 @@
 }
 
 func (a *apexBundle) getImageVariation(config android.DeviceConfig) string {
+	if a.vndkApex {
+		return "vendor." + a.vndkVersion(config)
+	}
 	if config.VndkVersion() != "" && proptools.Bool(a.properties.Use_vendor) {
 		return "vendor." + config.PlatformVndkVersion()
 	} else {
@@ -1237,7 +1236,7 @@
 	// prepend the name of this APEX to the module names. These names will be the names of
 	// modules that will be defined if the APEX is flattened.
 	for i := range filesInfo {
-		filesInfo[i].moduleName = ctx.ModuleName() + "." + filesInfo[i].moduleName
+		filesInfo[i].moduleName = filesInfo[i].moduleName + "." + ctx.ModuleName()
 	}
 
 	a.installDir = android.PathForModuleInstall(ctx, "apex")
@@ -1563,7 +1562,7 @@
 	if a.installable() {
 		// For flattened APEX, do nothing but make sure that apex_manifest.json and apex_pubkey are also copied along
 		// with other ordinary files.
-		a.filesInfo = append(a.filesInfo, apexFile{a.manifestOut, ctx.ModuleName() + ".apex_manifest.json", ".", etc, nil, nil})
+		a.filesInfo = append(a.filesInfo, apexFile{a.manifestOut, "apex_manifest.json." + ctx.ModuleName(), ".", etc, nil, nil})
 
 		// rename to apex_pubkey
 		copiedPubkey := android.PathForModuleOut(ctx, "apex_pubkey")
@@ -1572,7 +1571,7 @@
 			Input:  a.public_key_file,
 			Output: copiedPubkey,
 		})
-		a.filesInfo = append(a.filesInfo, apexFile{copiedPubkey, ctx.ModuleName() + ".apex_pubkey", ".", etc, nil, nil})
+		a.filesInfo = append(a.filesInfo, apexFile{copiedPubkey, "apex_pubkey." + ctx.ModuleName(), ".", etc, nil, nil})
 
 		if ctx.Config().FlattenApex() {
 			apexName := proptools.StringDefault(a.properties.Apex_name, ctx.ModuleName())
@@ -1812,19 +1811,18 @@
 		}{
 			proptools.StringPtr("both"),
 		})
-
-		vndkVersion := proptools.StringDefault(bundle.vndkProperties.Vndk_version, "current")
-		if vndkVersion == "current" {
-			vndkVersion = ctx.DeviceConfig().PlatformVndkVersion()
-			bundle.vndkProperties.Vndk_version = proptools.StringPtr(vndkVersion)
-		}
-
-		// Ensure VNDK APEX mount point is formatted as com.android.vndk.v###
-		bundle.properties.Apex_name = proptools.StringPtr("com.android.vndk.v" + vndkVersion)
 	})
 	return bundle
 }
 
+func (a *apexBundle) vndkVersion(config android.DeviceConfig) string {
+	vndkVersion := proptools.StringDefault(a.vndkProperties.Vndk_version, "current")
+	if vndkVersion == "current" {
+		vndkVersion = config.PlatformVndkVersion()
+	}
+	return vndkVersion
+}
+
 //
 // Defaults
 //
diff --git a/apex/apex_test.go b/apex/apex_test.go
index ae0ea7d..e618589 100644
--- a/apex/apex_test.go
+++ b/apex/apex_test.go
@@ -18,6 +18,7 @@
 	"io/ioutil"
 	"os"
 	"reflect"
+	"sort"
 	"strings"
 	"testing"
 
@@ -85,6 +86,10 @@
 	}
 }
 
+func withBinder32bit(fs map[string][]byte, config android.Config) {
+	config.TestProductVariables.Binder32bit = proptools.BoolPtr(true)
+}
+
 func testApexContext(t *testing.T, bp string, handlers ...testCustomizer) (*android.TestContext, android.Config) {
 	config := android.TestArchConfig(buildDir, nil)
 	config.TestProductVariables.DeviceVndkVersion = proptools.StringPtr("current")
@@ -132,13 +137,10 @@
 		ctx.BottomUp("test_per_src", cc.TestPerSrcMutator).Parallel()
 		ctx.BottomUp("version", cc.VersionMutator).Parallel()
 		ctx.BottomUp("begin", cc.BeginMutator).Parallel()
-		ctx.TopDown("apex_vndk_gather", apexVndkGatherMutator)
-		ctx.BottomUp("apex_vndk_add_deps", apexVndkAddDepsMutator)
 	})
+	ctx.PreDepsMutators(RegisterPreDepsMutators)
+	ctx.PostDepsMutators(RegisterPostDepsMutators)
 	ctx.PostDepsMutators(func(ctx android.RegisterMutatorsContext) {
-		ctx.TopDown("apex_deps", apexDepsMutator)
-		ctx.BottomUp("apex", apexMutator)
-		ctx.BottomUp("apex_uses", apexUsesMutator)
 		ctx.TopDown("prebuilt_select", android.PrebuiltSelectModuleMutator).Parallel()
 		ctx.BottomUp("prebuilt_postdeps", android.PrebuiltPostDepsMutator).Parallel()
 	})
@@ -1267,6 +1269,74 @@
 	ensureContains(t, cFlags, "-Imy_include")
 }
 
+func ensureExactContents(t *testing.T, ctx *android.TestContext, moduleName string, files []string) {
+	t.Helper()
+	apexRule := ctx.ModuleForTests(moduleName, "android_common_"+moduleName).Rule("apexRule")
+	copyCmds := apexRule.Args["copy_commands"]
+	imageApexDir := "/image.apex/"
+	dstFiles := []string{}
+	for _, cmd := range strings.Split(copyCmds, "&&") {
+		cmd = strings.TrimSpace(cmd)
+		if cmd == "" {
+			continue
+		}
+		terms := strings.Split(cmd, " ")
+		switch terms[0] {
+		case "mkdir":
+		case "cp":
+			if len(terms) != 3 {
+				t.Fatal("copyCmds contains invalid cp command", cmd)
+			}
+			dst := terms[2]
+			index := strings.Index(dst, imageApexDir)
+			if index == -1 {
+				t.Fatal("copyCmds should copy a file to image.apex/", cmd)
+			}
+			dstFile := dst[index+len(imageApexDir):]
+			dstFiles = append(dstFiles, dstFile)
+		default:
+			t.Fatalf("copyCmds should contain mkdir/cp commands only: %q", cmd)
+		}
+	}
+	sort.Strings(dstFiles)
+	sort.Strings(files)
+	missing := []string{}
+	surplus := []string{}
+	i := 0
+	j := 0
+	for i < len(dstFiles) && j < len(files) {
+		if dstFiles[i] == files[j] {
+			i++
+			j++
+		} else if dstFiles[i] < files[j] {
+			surplus = append(surplus, dstFiles[i])
+			i++
+		} else {
+			missing = append(missing, files[j])
+			j++
+		}
+	}
+	if i < len(dstFiles) {
+		surplus = append(surplus, dstFiles[i:]...)
+	}
+	if j < len(files) {
+		missing = append(missing, files[j:]...)
+	}
+
+	failed := false
+	if len(surplus) > 0 {
+		t.Log("surplus files", surplus)
+		failed = true
+	}
+	if len(missing) > 0 {
+		t.Log("missing files", missing)
+		failed = true
+	}
+	if failed {
+		t.Fail()
+	}
+}
+
 func TestVndkApexCurrent(t *testing.T) {
 	ctx, _ := testApex(t, `
 		apex_vndk {
@@ -1305,12 +1375,12 @@
 		}
 	`)
 
-	apexRule := ctx.ModuleForTests("myapex", "android_common_myapex").Rule("apexRule")
-	copyCmds := apexRule.Args["copy_commands"]
-	ensureContains(t, copyCmds, "image.apex/lib/libvndk.so")
-	ensureContains(t, copyCmds, "image.apex/lib/libvndksp.so")
-	ensureContains(t, copyCmds, "image.apex/lib64/libvndk.so")
-	ensureContains(t, copyCmds, "image.apex/lib64/libvndksp.so")
+	ensureExactContents(t, ctx, "myapex", []string{
+		"lib/libvndk.so",
+		"lib/libvndksp.so",
+		"lib64/libvndk.so",
+		"lib64/libvndksp.so",
+	})
 }
 
 func TestVndkApexWithPrebuilt(t *testing.T) {
@@ -1328,8 +1398,8 @@
 		}
 
 		cc_prebuilt_library_shared {
-			name: "libvndkshared",
-			srcs: ["libvndkshared.so"],
+			name: "libvndk",
+			srcs: ["libvndk.so"],
 			vendor_available: true,
 			vndk: {
 				enabled: true,
@@ -1337,13 +1407,33 @@
 			system_shared_libs: [],
 			stl: "none",
 		}
+
+		cc_prebuilt_library_shared {
+			name: "libvndk.arm",
+			srcs: ["libvndk.arm.so"],
+			vendor_available: true,
+			vndk: {
+				enabled: true,
+			},
+			enabled: false,
+			arch: {
+				arm: {
+					enabled: true,
+				},
+			},
+			system_shared_libs: [],
+			stl: "none",
+		}
 	`, withFiles(map[string][]byte{
-		"libvndkshared.so": nil,
+		"libvndk.so":     nil,
+		"libvndk.arm.so": nil,
 	}))
 
-	apexRule := ctx.ModuleForTests("myapex", "android_common_myapex").Rule("apexRule")
-	copyCmds := apexRule.Args["copy_commands"]
-	ensureContains(t, copyCmds, "image.apex/lib/libvndkshared.so")
+	ensureExactContents(t, ctx, "myapex", []string{
+		"lib/libvndk.so",
+		"lib/libvndk.arm.so",
+		"lib64/libvndk.so",
+	})
 }
 
 func TestVndkApexVersion(t *testing.T) {
@@ -1361,15 +1451,22 @@
 			private_key: "testkey.pem",
 		}
 
-		cc_library {
-			name: "libvndk",
-			srcs: ["mylib.cpp"],
+		vndk_prebuilt_shared {
+			name: "libvndk27",
+			version: "27",
 			vendor_available: true,
 			vndk: {
 				enabled: true,
 			},
-			system_shared_libs: [],
-			stl: "none",
+			target_arch: "arm64",
+			arch: {
+				arm: {
+					srcs: ["libvndk27_arm.so"],
+				},
+				arm64: {
+					srcs: ["libvndk27_arm64.so"],
+				},
+			},
 		}
 
 		vndk_prebuilt_shared {
@@ -1379,18 +1476,27 @@
 			vndk: {
 				enabled: true,
 			},
-			target_arch: "arm64",
-			srcs: ["libvndk27.so"],
-		}
+			target_arch: "x86_64",
+			arch: {
+				x86: {
+					srcs: ["libvndk27_x86.so"],
+				},
+				x86_64: {
+					srcs: ["libvndk27_x86_64.so"],
+				},
+			},
+	}
 	`, withFiles(map[string][]byte{
-		"libvndk27.so": nil,
+		"libvndk27_arm.so":    nil,
+		"libvndk27_arm64.so":  nil,
+		"libvndk27_x86.so":    nil,
+		"libvndk27_x86_64.so": nil,
 	}))
 
-	apexRule := ctx.ModuleForTests("myapex_v27", "android_common_myapex_v27").Rule("apexRule")
-	copyCmds := apexRule.Args["copy_commands"]
-	ensureContains(t, copyCmds, "image.apex/lib/libvndk27.so")
-	ensureContains(t, copyCmds, "image.apex/lib64/libvndk27.so")
-	ensureNotContains(t, copyCmds, "image.apex/lib/libvndk.so")
+	ensureExactContents(t, ctx, "myapex_v27", []string{
+		"lib/libvndk27_arm.so",
+		"lib64/libvndk27_arm64.so",
+	})
 }
 
 func TestVndkApexErrorWithDuplicateVersion(t *testing.T) {
@@ -1505,14 +1611,10 @@
 		},
 	}))
 
-	apexRule := ctx.ModuleForTests("myapex", "android_common_myapex").Rule("apexRule")
-	copyCmds := apexRule.Args["copy_commands"]
-	ensureContains(t, copyCmds, "image.apex/lib/libvndk.so")
-	ensureContains(t, copyCmds, "image.apex/lib64/libvndk.so")
-
-	// apex
-	ensureNotContains(t, copyCmds, "image.apex/lib/x86/libvndk.so")
-	ensureNotContains(t, copyCmds, "image.apex/lib64/x86_64/libvndk.so")
+	ensureExactContents(t, ctx, "myapex", []string{
+		"lib/libvndk.so",
+		"lib64/libvndk.so",
+	})
 }
 
 func TestVndkApexDoesntSupportNativeBridgeSupported(t *testing.T) {
@@ -1545,6 +1647,70 @@
 	`)
 }
 
+func TestVndkApexWithBinder32(t *testing.T) {
+	ctx, _ := testApex(t,
+		`
+		apex_vndk {
+			name: "myapex_v27",
+			key: "myapex.key",
+			file_contexts: "myapex",
+			vndk_version: "27",
+		}
+
+		apex_key {
+			name: "myapex.key",
+			public_key: "testkey.avbpubkey",
+			private_key: "testkey.pem",
+		}
+
+		vndk_prebuilt_shared {
+			name: "libvndk27",
+			version: "27",
+			target_arch: "arm",
+			vendor_available: true,
+			vndk: {
+				enabled: true,
+			},
+			arch: {
+				arm: {
+					srcs: ["libvndk27.so"],
+				}
+			},
+		}
+
+		vndk_prebuilt_shared {
+			name: "libvndk27",
+			version: "27",
+			target_arch: "arm",
+			binder32bit: true,
+			vendor_available: true,
+			vndk: {
+				enabled: true,
+			},
+			arch: {
+				arm: {
+					srcs: ["libvndk27binder32.so"],
+				}
+			},
+		}
+		`,
+		withFiles(map[string][]byte{
+			"libvndk27.so":         nil,
+			"libvndk27binder32.so": nil,
+		}),
+		withBinder32bit,
+		withTargets(map[android.OsType][]android.Target{
+			android.Android: []android.Target{
+				{Os: android.Android, Arch: android.Arch{ArchType: android.Arm, ArchVariant: "armv7-a-neon", Abi: []string{"armeabi-v7a"}}, NativeBridge: android.NativeBridgeDisabled, NativeBridgeHostArchName: "", NativeBridgeRelativePath: ""},
+			},
+		}),
+	)
+
+	ensureExactContents(t, ctx, "myapex_v27", []string{
+		"lib/libvndk27binder32.so",
+	})
+}
+
 func TestDependenciesInApexManifest(t *testing.T) {
 	ctx, _ := testApex(t, `
 		apex {
@@ -2055,12 +2221,12 @@
 	var builder strings.Builder
 	data.Custom(&builder, name, prefix, "", data)
 	androidMk := builder.String()
-	ensureContains(t, androidMk, "LOCAL_MODULE := myapex.mytest\n")
-	ensureContains(t, androidMk, "LOCAL_MODULE := myapex.mytest1\n")
-	ensureContains(t, androidMk, "LOCAL_MODULE := myapex.mytest2\n")
-	ensureContains(t, androidMk, "LOCAL_MODULE := myapex.mytest3\n")
-	ensureContains(t, androidMk, "LOCAL_MODULE := myapex.apex_manifest.json\n")
-	ensureContains(t, androidMk, "LOCAL_MODULE := myapex.apex_pubkey\n")
+	ensureContains(t, androidMk, "LOCAL_MODULE := mytest.myapex\n")
+	ensureContains(t, androidMk, "LOCAL_MODULE := mytest1.myapex\n")
+	ensureContains(t, androidMk, "LOCAL_MODULE := mytest2.myapex\n")
+	ensureContains(t, androidMk, "LOCAL_MODULE := mytest3.myapex\n")
+	ensureContains(t, androidMk, "LOCAL_MODULE := apex_manifest.json.myapex\n")
+	ensureContains(t, androidMk, "LOCAL_MODULE := apex_pubkey.myapex\n")
 	ensureContains(t, androidMk, "LOCAL_MODULE := myapex\n")
 }