diff --git a/adf/libadf/tests/Android.mk b/adf/libadf/tests/Android.mk
new file mode 100644
index 0000000..93efafa
--- /dev/null
+++ b/adf/libadf/tests/Android.mk
@@ -0,0 +1,22 @@
+#
+# Copyright (C) 2013 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.
+#
+LOCAL_PATH := $(my-dir)
+
+include $(CLEAR_VARS)
+LOCAL_SRC_FILES := adf_test.cpp
+LOCAL_MODULE := adf-unit-tests
+LOCAL_STATIC_LIBRARIES := libadf
+include $(BUILD_NATIVE_TEST)
diff --git a/adf/libadf/tests/adf_test.cpp b/adf/libadf/tests/adf_test.cpp
new file mode 100644
index 0000000..d95330d
--- /dev/null
+++ b/adf/libadf/tests/adf_test.cpp
@@ -0,0 +1,342 @@
+/*
+ * Copyright (C) 2013 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.
+ */
+
+#include <errno.h>
+#include <fcntl.h>
+
+#include <adf/adf.h>
+#include <gtest/gtest.h>
+#include <sys/mman.h>
+
+class AdfTest : public testing::Test {
+public:
+    AdfTest() : intf_id(0), intf(-1), eng_id(0), eng(-1) { }
+
+    virtual void SetUp() {
+        int err = adf_device_open(dev_id, O_RDWR, &dev);
+        ASSERT_GE(err, 0) << "opening ADF device " << dev_id <<
+                " failed: " << strerror(-err);
+
+        err = adf_find_simple_post_configuration(&dev, fmt8888, n_fmt8888,
+                &intf_id, &eng_id);
+        ASSERT_GE(err, 0) << "finding ADF configuration failed: " <<
+                strerror(-err);
+
+        intf = adf_interface_open(&dev, intf_id, O_RDWR);
+        ASSERT_GE(intf, 0) << "opening ADF interface " << dev_id << "." <<
+                intf_id << " failed: " << strerror(-intf);
+
+        eng = adf_overlay_engine_open(&dev, eng_id, O_RDWR);
+        ASSERT_GE(eng, 0) << "opening ADF overlay engine " << dev_id << "." <<
+                eng_id << " failed: " << strerror(-eng);
+    }
+
+    virtual void TearDown() {
+        if (eng >= 0)
+            close(eng);
+        if (intf >= 0)
+            close(intf);
+        adf_device_close(&dev);
+    }
+
+    void get8888Format(uint32_t &fmt, char fmt_str[ADF_FORMAT_STR_SIZE]) {
+        adf_overlay_engine_data data;
+        int err = adf_get_overlay_engine_data(eng, &data);
+        ASSERT_GE(err, 0) << "getting ADF overlay engine data failed: " <<
+                strerror(-err);
+
+        for (size_t i = 0; i < data.n_supported_formats; i++) {
+            for (size_t j = 0; j < n_fmt8888; j++) {
+                if (data.supported_formats[i] == fmt8888[j]) {
+                    fmt = data.supported_formats[i];
+                    adf_format_str(fmt, fmt_str);
+                    adf_free_overlay_engine_data(&data);
+                    return;
+                }
+            }
+        }
+
+        adf_free_overlay_engine_data(&data);
+        FAIL(); /* this should never happen */
+    }
+
+    void drawCheckerboard(void *buf, uint32_t w, uint32_t h, uint32_t pitch) {
+        uint8_t *buf8 = reinterpret_cast<uint8_t *>(buf);
+        for (uint32_t y = 0; y < h / 2; y++) {
+            uint32_t *scanline = reinterpret_cast<uint32_t *>(buf8 + y * pitch);
+            for (uint32_t x = 0; x < w / 2; x++)
+                scanline[x] = 0xFF0000FF;
+            for (uint32_t x = w / 2; x < w; x++)
+                scanline[x] = 0xFF00FFFF;
+        }
+        for (uint32_t y = h / 2; y < h; y++) {
+            uint32_t *scanline = reinterpret_cast<uint32_t *>(buf8 + y * pitch);
+            for (uint32_t x = 0; x < w / 2; x++)
+                scanline[x] = 0xFFFF00FF;
+            for (uint32_t x = w / 2; x < w; x++)
+                scanline[x] = 0xFFFFFFFF;
+        }
+    }
+
+    /* various helpers to call ADF and die on failure */
+
+    void getInterfaceData(adf_interface_data &data) {
+         int err = adf_get_interface_data(intf, &data);
+         ASSERT_GE(err, 0) << "getting ADF interface data failed: " <<
+                 strerror(-err);
+    }
+
+    void getCurrentMode(uint32_t &w, uint32_t &h) {
+        adf_interface_data data;
+        ASSERT_NO_FATAL_FAILURE(getInterfaceData(data));
+        w = data.current_mode.hdisplay;
+        h = data.current_mode.vdisplay;
+        adf_free_interface_data(&data);
+    }
+
+    void blank(uint8_t mode) {
+        int err = adf_interface_blank(intf, mode);
+        ASSERT_FALSE(err < 0 && err != -EBUSY) <<
+                "unblanking interface failed: " << strerror(-err);
+    }
+
+    void attach() {
+        int err = adf_device_attach(&dev, eng_id, intf_id);
+        ASSERT_FALSE(err < 0 && err != -EALREADY) <<
+                "attaching overlay engine " << eng_id << " to interface " <<
+                intf_id << " failed: " << strerror(-err);
+    }
+
+    void detach() {
+        int err = adf_device_detach(&dev, eng_id, intf_id);
+        ASSERT_FALSE(err < 0 && err != -EINVAL) <<
+                "detaching overlay engine " << eng_id << " from interface " <<
+                intf_id << " failed: " << strerror(-err);
+    }
+
+    void readVsyncTimestamp(uint64_t &timestamp) {
+        adf_event *event;
+        int err = adf_read_event(intf, &event);
+        ASSERT_GE(err, 0) << "reading ADF event failed: " << strerror(-err);
+
+        ASSERT_EQ(ADF_EVENT_VSYNC, event->type);
+        ASSERT_EQ(sizeof(adf_vsync_event), event->length);
+
+        adf_vsync_event *vsync_event =
+                reinterpret_cast<adf_vsync_event *>(event);
+        timestamp = vsync_event->timestamp;
+        free(event);
+    }
+
+protected:
+    adf_device dev;
+    adf_id_t intf_id;
+    int intf;
+    adf_id_t eng_id;
+    int eng;
+
+private:
+    const static adf_id_t dev_id = 0;
+    const static __u32 fmt8888[];
+    const static size_t n_fmt8888;
+};
+
+const __u32 AdfTest::fmt8888[] = {
+   DRM_FORMAT_XRGB8888,
+   DRM_FORMAT_XBGR8888,
+   DRM_FORMAT_RGBX8888,
+   DRM_FORMAT_BGRX8888,
+   DRM_FORMAT_ARGB8888,
+   DRM_FORMAT_ABGR8888,
+   DRM_FORMAT_RGBA8888,
+   DRM_FORMAT_BGRA8888
+};
+const size_t AdfTest::n_fmt8888 = sizeof(fmt8888) / sizeof(fmt8888[0]);
+
+TEST(adf, devices) {
+    adf_id_t *devs;
+    ssize_t n_devs = adf_devices(&devs);
+    free(devs);
+
+    ASSERT_GE(n_devs, 0) << "enumerating ADF devices failed: " <<
+            strerror(-n_devs);
+    ASSERT_TRUE(devs != NULL);
+}
+
+TEST_F(AdfTest, device_data) {
+    adf_device_data data;
+    int err = adf_get_device_data(&dev, &data);
+    ASSERT_GE(err, 0) << "getting ADF device data failed: " << strerror(-err);
+
+    EXPECT_LT(data.n_attachments, ADF_MAX_ATTACHMENTS);
+    EXPECT_GT(data.n_allowed_attachments, 0);
+    EXPECT_LT(data.n_allowed_attachments, ADF_MAX_ATTACHMENTS);
+    EXPECT_LT(data.custom_data_size, ADF_MAX_CUSTOM_DATA_SIZE);
+    adf_free_device_data(&data);
+}
+
+TEST_F(AdfTest, interface_data) {
+    adf_interface_data data;
+    ASSERT_NO_FATAL_FAILURE(getInterfaceData(data));
+
+    EXPECT_LT(data.type, ADF_INTF_TYPE_MAX);
+    EXPECT_LE(data.dpms_state, DRM_MODE_DPMS_OFF);
+    EXPECT_EQ(1, data.hotplug_detect);
+    EXPECT_GT(data.n_available_modes, 0);
+    EXPECT_LT(data.custom_data_size, ADF_MAX_CUSTOM_DATA_SIZE);
+    adf_free_interface_data(&data);
+}
+
+TEST_F(AdfTest, overlay_engine_data) {
+    adf_overlay_engine_data data;
+    int err = adf_get_overlay_engine_data(eng, &data);
+    ASSERT_GE(err, 0) << "getting ADF overlay engine failed: " <<
+            strerror(-err);
+
+    EXPECT_GT(data.n_supported_formats, 0);
+    EXPECT_LT(data.n_supported_formats, ADF_MAX_SUPPORTED_FORMATS);
+    EXPECT_LT(data.custom_data_size, ADF_MAX_CUSTOM_DATA_SIZE);
+    adf_free_overlay_engine_data(&data);
+}
+
+TEST_F(AdfTest, blank) {
+    int err = adf_interface_blank(intf, (uint8_t)-1);
+    EXPECT_EQ(-EINVAL, err) << "setting bogus DPMS mode should have failed";
+
+    err = adf_interface_blank(eng, DRM_MODE_DPMS_OFF);
+    EXPECT_EQ(-EINVAL, err) << "blanking overlay engine should have failed";
+
+    ASSERT_NO_FATAL_FAILURE(blank(DRM_MODE_DPMS_OFF));
+    err = adf_interface_blank(intf, DRM_MODE_DPMS_OFF);
+    EXPECT_EQ(-EBUSY, err) << "blanking interface twice should have failed";
+
+    ASSERT_NO_FATAL_FAILURE(blank(DRM_MODE_DPMS_ON));
+    err = adf_interface_blank(intf, DRM_MODE_DPMS_ON);
+    EXPECT_EQ(-EBUSY, err) << "unblanking interface twice should have failed";
+
+    adf_interface_data data;
+    ASSERT_NO_FATAL_FAILURE(getInterfaceData(data));
+    EXPECT_EQ(DRM_MODE_DPMS_ON, data.dpms_state);
+    adf_free_interface_data(&data);
+}
+
+TEST_F(AdfTest, event) {
+    int err = adf_set_event(intf, ADF_EVENT_TYPE_MAX, true);
+    EXPECT_EQ(-EINVAL, err) << "enabling bogus ADF event should have failed";
+
+    err = adf_set_event(intf, ADF_EVENT_TYPE_MAX, false);
+    EXPECT_EQ(-EINVAL, err) << "disabling bogus ADF event should have failed";
+
+    err = adf_set_event(intf, ADF_EVENT_VSYNC, true);
+    ASSERT_GE(err, 0) << "enabling vsync event failed: " << strerror(-err);
+
+    err = adf_set_event(intf, ADF_EVENT_VSYNC, true);
+    EXPECT_EQ(-EALREADY, err) <<
+            "enabling vsync event twice should have failed";
+
+    ASSERT_NO_FATAL_FAILURE(blank(DRM_MODE_DPMS_ON));
+
+    uint64_t timestamp1, timestamp2;
+    ASSERT_NO_FATAL_FAILURE(readVsyncTimestamp(timestamp1));
+    ASSERT_NO_FATAL_FAILURE(readVsyncTimestamp(timestamp2));
+    EXPECT_GT(timestamp2, timestamp1);
+
+    err = adf_set_event(intf, ADF_EVENT_VSYNC, false);
+    EXPECT_GE(err, 0) << "disabling vsync event failed: " << strerror(-err);
+
+    err = adf_set_event(intf, ADF_EVENT_VSYNC, false);
+    EXPECT_EQ(-EALREADY, err) <<
+            "disabling vsync event twice should have failed";
+}
+
+TEST_F(AdfTest, attach) {
+    ASSERT_NO_FATAL_FAILURE(attach());
+    int err = adf_device_attach(&dev, eng_id, intf_id);
+    EXPECT_EQ(-EALREADY, err) << "attaching overlay engine " << eng_id <<
+            " to interface " << intf_id << " twice should have failed";
+
+    ASSERT_NO_FATAL_FAILURE(detach());
+    err = adf_device_detach(&dev, eng_id, intf_id);
+    EXPECT_EQ(-EINVAL, err) << "detaching overlay engine " << eng_id <<
+            " from interface " << intf_id << " twice should have failed";
+
+    err = adf_device_attach(&dev, eng_id, ADF_MAX_INTERFACES);
+    EXPECT_EQ(-EINVAL, err) << "attaching overlay engine " << eng_id <<
+            " to bogus interface should have failed";
+
+    err = adf_device_detach(&dev, eng_id, ADF_MAX_INTERFACES);
+    EXPECT_EQ(-EINVAL, err) << "detaching overlay engine " << eng_id <<
+            " from bogus interface should have failed";
+}
+
+TEST_F(AdfTest, simple_buffer_alloc) {
+    uint32_t w = 0, h = 0;
+    ASSERT_NO_FATAL_FAILURE(getCurrentMode(w, h));
+
+    uint32_t format;
+    char format_str[ADF_FORMAT_STR_SIZE];
+    ASSERT_NO_FATAL_FAILURE(get8888Format(format, format_str));
+
+    uint32_t offset;
+    uint32_t pitch;
+    int buf_fd = adf_interface_simple_buffer_alloc(intf, w, h, format, &offset,
+            &pitch);
+    EXPECT_GE(buf_fd, 0) << "allocating " << w << "x" << h << " " <<
+            format_str << " buffer failed: " << strerror(-buf_fd);
+    EXPECT_GE(pitch, w * 4);
+    close(buf_fd);
+
+    buf_fd = adf_interface_simple_buffer_alloc(intf, w, h, 0xDEADBEEF, &offset,
+            &pitch);
+    /* n.b.: ADF only allows simple buffers with built-in RGB formats,
+       so this should fail even if a driver supports custom format 0xDEADBEEF */
+    EXPECT_EQ(-EINVAL, buf_fd) <<
+            "allocating buffer with bogus format should have failed";
+}
+
+TEST_F(AdfTest, simple_buffer) {
+    uint32_t w = 0, h = 0;
+    ASSERT_NO_FATAL_FAILURE(getCurrentMode(w, h));
+
+    uint32_t format = 0;
+    char format_str[ADF_FORMAT_STR_SIZE];
+    ASSERT_NO_FATAL_FAILURE(get8888Format(format, format_str));
+
+    uint32_t offset;
+    uint32_t pitch;
+    int buf_fd = adf_interface_simple_buffer_alloc(intf, w, h, format, &offset,
+            &pitch);
+    ASSERT_GE(buf_fd, 0) << "allocating " << w << "x" << h << " " <<
+            format_str << " buffer failed: " << strerror(-buf_fd);
+    EXPECT_GE(pitch, w * 4);
+
+    void *mapped = mmap(NULL, pitch * h, PROT_WRITE, MAP_SHARED, buf_fd,
+            offset);
+    ASSERT_NE(mapped, MAP_FAILED) << "mapping " << w << "x" << h << " " <<
+            format_str << " buffer failed: " << strerror(-errno);
+    drawCheckerboard(mapped, w, h, pitch);
+    munmap(mapped, pitch * h);
+
+    ASSERT_NO_FATAL_FAILURE(attach());
+    ASSERT_NO_FATAL_FAILURE(blank(DRM_MODE_DPMS_ON));
+
+    int release_fence = adf_interface_simple_post(intf, eng_id, w, h, format,
+            buf_fd, offset, pitch, -1);
+    close(buf_fd);
+    ASSERT_GE(release_fence, 0) << "posting " << w << "x" << h << " " <<
+            format_str << " buffer failed: " << strerror(-release_fence);
+    close(release_fence);
+}
diff --git a/sdcard/sdcard.c b/sdcard/sdcard.c
index 9ba81ff..2318978 100644
--- a/sdcard/sdcard.c
+++ b/sdcard/sdcard.c
@@ -1834,7 +1834,7 @@
             "fd=%i,rootmode=40000,default_permissions,allow_other,user_id=%d,group_id=%d",
             fd, uid, gid);
 
-    res = mount("/dev/fuse", dest_path, "fuse", MS_NOSUID | MS_NODEV, opts);
+    res = mount("/dev/fuse", dest_path, "fuse", MS_NOSUID | MS_NODEV | MS_NOEXEC, opts);
     if (res < 0) {
         ERROR("cannot mount fuse filesystem: %s\n", strerror(errno));
         goto error;