diff --git a/dalvikvm/Android.mk b/dalvikvm/Android.mk
index 5960a4b..734f6f5 100644
--- a/dalvikvm/Android.mk
+++ b/dalvikvm/Android.mk
@@ -61,7 +61,7 @@
         # OS X comes with all these libraries, so there is no need
         # to build any of them. Note: OpenSSL consists of libssl
         # and libcrypto.
-        LOCAL_LDLIBS := -lffi -lssl -lcrypto -lz -lsqlite3
+        LOCAL_LDLIBS := -lffi -lssl -lcrypto -lz
     else
         LOCAL_LDLIBS += -ldl -lpthread
         LOCAL_SHARED_LIBRARIES += libdvm libcrypto libicuuc libicui18n libssl
diff --git a/dexopt/Android.mk b/dexopt/Android.mk
index 04f2f97..df8a82f 100644
--- a/dexopt/Android.mk
+++ b/dexopt/Android.mk
@@ -43,7 +43,7 @@
 
 LOCAL_SRC_FILES := $(local_src_files)
 LOCAL_C_INCLUDES := $(local_c_includes)
-LOCAL_SHARED_LIBRARIES := $(local_shared_libraries) libcutils libexpat liblog libnativehelper libutils libz
+LOCAL_SHARED_LIBRARIES := $(local_shared_libraries) libcutils libexpat liblog libnativehelper libz
 LOCAL_MODULE_TAGS := optional
 LOCAL_MODULE := dexopt
 
@@ -59,7 +59,7 @@
     LOCAL_SRC_FILES := $(local_src_files)
     LOCAL_C_INCLUDES := $(local_c_includes)
     LOCAL_SHARED_LIBRARIES := $(local_shared_libraries)
-    LOCAL_STATIC_LIBRARIES :=  libcutils libexpat liblog libnativehelper libutils libz
+    LOCAL_STATIC_LIBRARIES :=  libcutils libexpat liblog libnativehelper libz
     LOCAL_LDLIBS += -ldl -lpthread
     LOCAL_CFLAGS += -DANDROID_SMP=1
     LOCAL_MODULE_TAGS := optional
diff --git a/libnativehelper/Android.mk b/libnativehelper/Android.mk
index 3b0b6dc..dea0907 100644
--- a/libnativehelper/Android.mk
+++ b/libnativehelper/Android.mk
@@ -34,7 +34,6 @@
     libcrypto  \
     libicui18n \
     libicuuc   \
-    libsqlite \
     libssl
 
 static_libraries := \
@@ -52,7 +51,7 @@
 LOCAL_SRC_FILES := $(src_files)
 LOCAL_C_INCLUDES := $(c_includes)
 LOCAL_STATIC_LIBRARIES := $(static_libraries)
-LOCAL_SHARED_LIBRARIES := $(shared_libraries) libcutils libexpat liblog libstlport libutils libz
+LOCAL_SHARED_LIBRARIES := $(shared_libraries) libcutils libexpat liblog libstlport libz
 LOCAL_MODULE_TAGS := optional
 LOCAL_MODULE := libnativehelper
 
@@ -74,11 +73,10 @@
     ifeq ($(HOST_OS)-$(HOST_ARCH),darwin-x86)
         # OSX has a lot of libraries built in, which we don't have to
         # bother building; just include them on the ld line.
-        LOCAL_LDLIBS := -lexpat -lssl -lz -lcrypto -licucore -lsqlite3
-        LOCAL_WHOLE_STATIC_LIBRARIES += libutils
+        LOCAL_LDLIBS := -lexpat -lssl -lz -lcrypto -licucore
     else
         LOCAL_SHARED_LIBRARIES := $(shared_libraries)
-        LOCAL_STATIC_LIBRARIES := libcutils libexpat liblog libutils libz
+        LOCAL_STATIC_LIBRARIES := libcutils libexpat liblog libz
     endif
 
     LOCAL_MODULE_TAGS := optional
diff --git a/unit-tests/Android.mk b/unit-tests/Android.mk
index e9b8a74..62b666a 100644
--- a/unit-tests/Android.mk
+++ b/unit-tests/Android.mk
@@ -34,7 +34,7 @@
 LOCAL_MODULE := $(test_module)
 LOCAL_MODULE_TAGS := $(test_tags)
 LOCAL_SRC_FILES := $(test_src_files)
-LOCAL_SHARED_LIBRARIES += libcutils libutils libdvm
+LOCAL_SHARED_LIBRARIES += libcutils libdvm
 include $(BUILD_NATIVE_TEST)
 
 # Build for the host.
@@ -46,5 +46,5 @@
 #LOCAL_MODULE_TAGS := $(test_tags)
 #LOCAL_SRC_FILES := $(test_src_files)
 #LOCAL_SHARED_LIBRARIES += libdvm libcrypto libssl libicuuc libicui18n
-#LOCAL_WHOLE_STATIC_LIBRARIES += libcutils libutils liblog libdvm
+#LOCAL_WHOLE_STATIC_LIBRARIES += libcutils liblog libdvm
 #include $(BUILD_HOST_NATIVE_TEST)
diff --git a/vm/Android.mk b/vm/Android.mk
index 84a35e3..b1f3d0d 100644
--- a/vm/Android.mk
+++ b/vm/Android.mk
@@ -112,7 +112,7 @@
     # Build as a WHOLE static library so dependencies are available at link
     # time. When building this target as a regular static library, certain
     # dependencies like expat are not found by the linker.
-    LOCAL_WHOLE_STATIC_LIBRARIES += libexpat libcutils libdex liblog libnativehelper libutils libz
+    LOCAL_WHOLE_STATIC_LIBRARIES += libexpat libcutils libdex liblog libnativehelper libz
 
     # The libffi from the source tree should never be used by host builds.
     # The recommendation is that host builds should always either
diff --git a/vm/Dvm.mk b/vm/Dvm.mk
index 9688dfe..72d9299 100644
--- a/vm/Dvm.mk
+++ b/vm/Dvm.mk
@@ -188,6 +188,13 @@
 	test/TestHash.cpp \
 	test/TestIndirectRefTable.cpp
 
+# TODO: this is the wrong test, but what's the right one?
+ifeq ($(dvm_arch),arm)
+  LOCAL_SRC_FILES += os/android.cpp
+else
+  LOCAL_SRC_FILES += os/linux.cpp
+endif
+
 WITH_COPYING_GC := $(strip $(WITH_COPYING_GC))
 
 ifeq ($(WITH_COPYING_GC),true)
diff --git a/vm/Thread.cpp b/vm/Thread.cpp
index bef4bc6..3844b25 100644
--- a/vm/Thread.cpp
+++ b/vm/Thread.cpp
@@ -18,8 +18,7 @@
  * Thread support.
  */
 #include "Dalvik.h"
-
-#include "utils/threads.h"      // need Android thread priorities
+#include "os/os.h"
 
 #include <stdlib.h>
 #include <unistd.h>
@@ -240,7 +239,6 @@
 static void threadExitUncaughtException(Thread* thread, Object* group);
 static void threadExitCheck(void* arg);
 static void waitForThreadSuspend(Thread* self, Thread* thread);
-static int getThreadPriorityFromSystem();
 
 /*
  * Initialize thread list and main thread's environment.  We need to set
@@ -1889,7 +1887,7 @@
      */
     JValue unused;
     dvmCallMethod(self, init, threadObj, &unused, (Object*)pArgs->group,
-        threadNameStr, getThreadPriorityFromSystem(), isDaemon);
+            threadNameStr, os_getThreadPriorityFromSystem(), isDaemon);
     if (dvmCheckException(self)) {
         LOGE("exception thrown while constructing attached thread object");
         goto fail_unlink;
@@ -3075,89 +3073,12 @@
     return thread;
 }
 
-
-/*
- * Conversion map for "nice" values.
- *
- * We use Android thread priority constants to be consistent with the rest
- * of the system.  In some cases adjacent entries may overlap.
- */
-static const int kNiceValues[10] = {
-    ANDROID_PRIORITY_LOWEST,                /* 1 (MIN_PRIORITY) */
-    ANDROID_PRIORITY_BACKGROUND + 6,
-    ANDROID_PRIORITY_BACKGROUND + 3,
-    ANDROID_PRIORITY_BACKGROUND,
-    ANDROID_PRIORITY_NORMAL,                /* 5 (NORM_PRIORITY) */
-    ANDROID_PRIORITY_NORMAL - 2,
-    ANDROID_PRIORITY_NORMAL - 4,
-    ANDROID_PRIORITY_URGENT_DISPLAY + 3,
-    ANDROID_PRIORITY_URGENT_DISPLAY + 2,
-    ANDROID_PRIORITY_URGENT_DISPLAY         /* 10 (MAX_PRIORITY) */
-};
-
-/*
- * Change the priority of a system thread to match that of the Thread object.
- *
- * We map a priority value from 1-10 to Linux "nice" values, where lower
- * numbers indicate higher priority.
- */
 void dvmChangeThreadPriority(Thread* thread, int newPriority)
 {
-    pid_t pid = thread->systemTid;
-    int newNice;
-
-    if (newPriority < 1 || newPriority > 10) {
-        LOGW("bad priority %d", newPriority);
-        newPriority = 5;
-    }
-    newNice = kNiceValues[newPriority-1];
-
-    if (newNice >= ANDROID_PRIORITY_BACKGROUND) {
-        set_sched_policy(dvmGetSysThreadId(), SP_BACKGROUND);
-    } else if (getpriority(PRIO_PROCESS, pid) >= ANDROID_PRIORITY_BACKGROUND) {
-        set_sched_policy(dvmGetSysThreadId(), SP_FOREGROUND);
-    }
-
-    if (setpriority(PRIO_PROCESS, pid, newNice) != 0) {
-        std::string threadName(dvmGetThreadName(thread));
-        LOGI("setPriority(%d) '%s' to prio=%d(n=%d) failed: %s",
-                pid, threadName.c_str(), newPriority, newNice, strerror(errno));
-    } else {
-        LOGV("setPriority(%d) to prio=%d(n=%d)", pid, newPriority, newNice);
-    }
+    os_changeThreadPriority(thread, newPriority);
 }
 
 /*
- * Get the thread priority for the current thread by querying the system.
- * This is useful when attaching a thread through JNI.
- *
- * Returns a value from 1 to 10 (compatible with java.lang.Thread values).
- */
-static int getThreadPriorityFromSystem()
-{
-    int i, sysprio, jprio;
-
-    errno = 0;
-    sysprio = getpriority(PRIO_PROCESS, 0);
-    if (sysprio == -1 && errno != 0) {
-        LOGW("getpriority() failed: %s", strerror(errno));
-        return THREAD_NORM_PRIORITY;
-    }
-
-    jprio = THREAD_MIN_PRIORITY;
-    for (i = 0; i < NELEM(kNiceValues); i++) {
-        if (sysprio >= kNiceValues[i])
-            break;
-        jprio++;
-    }
-    if (jprio > THREAD_MAX_PRIORITY)
-        jprio = THREAD_MAX_PRIORITY;
-
-    return jprio;
-}
-
-
-/*
  * Return true if the thread is on gDvm.threadList.
  * Caller should not hold gDvm.threadListLock.
  */
diff --git a/vm/alloc/Heap.cpp b/vm/alloc/Heap.cpp
index 534aad8..bd33322 100644
--- a/vm/alloc/Heap.cpp
+++ b/vm/alloc/Heap.cpp
@@ -24,10 +24,7 @@
 #include "alloc/DdmHeap.h"
 #include "alloc/HeapSource.h"
 #include "alloc/MarkSweep.h"
-
-#include "utils/threads.h"      // need Android thread priorities
-
-#include <cutils/sched_policy.h>
+#include "os/os.h"
 
 #include <sys/time.h>
 #include <sys/resource.h>
@@ -443,60 +440,6 @@
 }
 
 /*
- * Raises the scheduling priority of the current thread.  Returns the
- * original priority if successful.  Otherwise, returns INT_MAX on
- * failure.
- */
-static int raiseThreadPriority()
-{
-    /* Get the priority (the "nice" value) of the current thread.  The
-     * getpriority() call can legitimately return -1, so we have to
-     * explicitly test errno.
-     */
-    errno = 0;
-    int oldThreadPriority = getpriority(PRIO_PROCESS, 0);
-    if (errno != 0) {
-        LOGI_HEAP("getpriority(self) failed: %s", strerror(errno));
-    } else if (oldThreadPriority > ANDROID_PRIORITY_NORMAL) {
-        /* Current value is numerically greater than "normal", which
-         * in backward UNIX terms means lower priority.
-         */
-        if (oldThreadPriority >= ANDROID_PRIORITY_BACKGROUND) {
-            set_sched_policy(dvmGetSysThreadId(), SP_FOREGROUND);
-        }
-        if (setpriority(PRIO_PROCESS, 0, ANDROID_PRIORITY_NORMAL) != 0) {
-            LOGI_HEAP("Unable to elevate priority from %d to %d",
-                      oldThreadPriority, ANDROID_PRIORITY_NORMAL);
-        } else {
-            /*
-             * The priority has been elevated.  Return the old value
-             * so the caller can restore it later.
-             */
-            LOGD_HEAP("Elevating priority from %d to %d",
-                      oldThreadPriority, ANDROID_PRIORITY_NORMAL);
-            return oldThreadPriority;
-        }
-    }
-    return INT_MAX;
-}
-
-/*
- * Sets the current thread scheduling priority.
- */
-static void setThreadPriority(int newThreadPriority)
-{
-    if (setpriority(PRIO_PROCESS, 0, newThreadPriority) != 0) {
-        LOGW_HEAP("Unable to reset priority to %d: %s",
-                  newThreadPriority, strerror(errno));
-    } else {
-        LOGD_HEAP("Reset priority to %d", oldThreadPriority);
-    }
-    if (newThreadPriority >= ANDROID_PRIORITY_BACKGROUND) {
-        set_sched_policy(dvmGetSysThreadId(), SP_BACKGROUND);
-    }
-}
-
-/*
  * Initiate garbage collection.
  *
  * NOTES:
@@ -541,7 +484,7 @@
      * thread performing the garbage collection.
      */
     if (!spec->isConcurrent) {
-        oldThreadPriority = raiseThreadPriority();
+        oldThreadPriority = os_raiseThreadPriority();
     }
     if (gDvm.preVerify) {
         LOGV_HEAP("Verifying roots and heap before GC");
@@ -704,7 +647,7 @@
          * changed at the start of the current garbage collection.
          */
         if (oldThreadPriority != INT_MAX) {
-            setThreadPriority(oldThreadPriority);
+            os_lowerThreadPriority(oldThreadPriority);
         }
     }
 
diff --git a/vm/os/android.cpp b/vm/os/android.cpp
new file mode 100644
index 0000000..b7e5df5
--- /dev/null
+++ b/vm/os/android.cpp
@@ -0,0 +1,139 @@
+/*
+ * Copyright (C) 2011 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 "os.h"
+
+#include "Dalvik.h"
+
+#include <sys/time.h>
+#include <sys/resource.h>
+#include <limits.h>
+#include <errno.h>
+
+#include <cutils/sched_policy.h>
+#include <utils/threads.h>
+
+/*
+ * Conversion map for "nice" values.
+ *
+ * We use Android thread priority constants to be consistent with the rest
+ * of the system.  In some cases adjacent entries may overlap.
+ */
+static const int kNiceValues[10] = {
+    ANDROID_PRIORITY_LOWEST,                /* 1 (MIN_PRIORITY) */
+    ANDROID_PRIORITY_BACKGROUND + 6,
+    ANDROID_PRIORITY_BACKGROUND + 3,
+    ANDROID_PRIORITY_BACKGROUND,
+    ANDROID_PRIORITY_NORMAL,                /* 5 (NORM_PRIORITY) */
+    ANDROID_PRIORITY_NORMAL - 2,
+    ANDROID_PRIORITY_NORMAL - 4,
+    ANDROID_PRIORITY_URGENT_DISPLAY + 3,
+    ANDROID_PRIORITY_URGENT_DISPLAY + 2,
+    ANDROID_PRIORITY_URGENT_DISPLAY         /* 10 (MAX_PRIORITY) */
+};
+
+void os_changeThreadPriority(Thread* thread, int newPriority)
+{
+    if (newPriority < 1 || newPriority > 10) {
+        LOGW("bad priority %d", newPriority);
+        newPriority = 5;
+    }
+
+    int newNice = kNiceValues[newPriority-1];
+    pid_t pid = thread->systemTid;
+
+    if (newNice >= ANDROID_PRIORITY_BACKGROUND) {
+        set_sched_policy(dvmGetSysThreadId(), SP_BACKGROUND);
+    } else if (getpriority(PRIO_PROCESS, pid) >= ANDROID_PRIORITY_BACKGROUND) {
+        set_sched_policy(dvmGetSysThreadId(), SP_FOREGROUND);
+    }
+
+    if (setpriority(PRIO_PROCESS, pid, newNice) != 0) {
+        std::string threadName(dvmGetThreadName(thread));
+        LOGI("setPriority(%d) '%s' to prio=%d(n=%d) failed: %s",
+        pid, threadName.c_str(), newPriority, newNice, strerror(errno));
+    } else {
+        LOGV("setPriority(%d) to prio=%d(n=%d)", pid, newPriority, newNice);
+    }
+}
+
+int os_getThreadPriorityFromSystem()
+{
+    errno = 0;
+    int sysprio = getpriority(PRIO_PROCESS, 0);
+    if (sysprio == -1 && errno != 0) {
+        LOGW("getpriority() failed: %s", strerror(errno));
+        return THREAD_NORM_PRIORITY;
+    }
+
+    int jprio = THREAD_MIN_PRIORITY;
+    for (int i = 0; i < NELEM(kNiceValues); i++) {
+        if (sysprio >= kNiceValues[i]) {
+            break;
+        }
+        jprio++;
+    }
+    if (jprio > THREAD_MAX_PRIORITY) {
+        jprio = THREAD_MAX_PRIORITY;
+    }
+    return jprio;
+}
+
+int os_raiseThreadPriority()
+{
+    /* Get the priority (the "nice" value) of the current thread.  The
+     * getpriority() call can legitimately return -1, so we have to
+     * explicitly test errno.
+     */
+    errno = 0;
+    int oldThreadPriority = getpriority(PRIO_PROCESS, 0);
+    if (errno != 0) {
+        LOGI("getpriority(self) failed: %s", strerror(errno));
+    } else if (oldThreadPriority > ANDROID_PRIORITY_NORMAL) {
+        /* Current value is numerically greater than "normal", which
+         * in backward UNIX terms means lower priority.
+         */
+        if (oldThreadPriority >= ANDROID_PRIORITY_BACKGROUND) {
+            set_sched_policy(dvmGetSysThreadId(), SP_FOREGROUND);
+        }
+        if (setpriority(PRIO_PROCESS, 0, ANDROID_PRIORITY_NORMAL) != 0) {
+            LOGI("Unable to elevate priority from %d to %d",
+                    oldThreadPriority, ANDROID_PRIORITY_NORMAL);
+        } else {
+            /*
+             * The priority has been elevated.  Return the old value
+             * so the caller can restore it later.
+             */
+            LOGD("Elevating priority from %d to %d",
+                    oldThreadPriority, ANDROID_PRIORITY_NORMAL);
+            return oldThreadPriority;
+        }
+    }
+    return INT_MAX;
+}
+
+void os_lowerThreadPriority(int oldThreadPriority)
+{
+    if (setpriority(PRIO_PROCESS, 0, oldThreadPriority) != 0) {
+        LOGW("Unable to reset priority to %d: %s",
+                oldThreadPriority, strerror(errno));
+    } else {
+        LOGD("Reset priority to %d", oldThreadPriority);
+    }
+    if (oldThreadPriority >= ANDROID_PRIORITY_BACKGROUND) {
+        set_sched_policy(dvmGetSysThreadId(), SP_BACKGROUND);
+    }
+}
diff --git a/vm/os/linux.cpp b/vm/os/linux.cpp
new file mode 100644
index 0000000..172cd05
--- /dev/null
+++ b/vm/os/linux.cpp
@@ -0,0 +1,39 @@
+/*
+ * Copyright (C) 2011 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 "os.h"
+
+#include "Dalvik.h"
+
+int os_raiseThreadPriority()
+{
+    return 0;
+}
+
+void os_lowerThreadPriority(int oldThreadPriority)
+{
+    // Do nothing.
+}
+
+void os_changeThreadPriority(Thread* thread, int newPriority)
+{
+    // Do nothing.
+}
+
+int os_getThreadPriorityFromSystem()
+{
+    return THREAD_NORM_PRIORITY;
+}
diff --git a/vm/os/os.h b/vm/os/os.h
new file mode 100644
index 0000000..19e2a61
--- /dev/null
+++ b/vm/os/os.h
@@ -0,0 +1,50 @@
+/*
+ * Copyright (C) 2011 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.
+ */
+
+struct Thread;
+
+/*
+ * Raises the scheduling priority of the current thread.  Returns the
+ * original priority if successful, or INT_MAX on failure.
+ * Use os_lowerThreadPriority to undo.
+ *
+ * TODO: does the GC really need this?
+ */
+int os_raiseThreadPriority();
+
+/*
+ * Sets the current thread scheduling priority. Used to undo the effects
+ * of an earlier call to os_raiseThreadPriority.
+ *
+ * TODO: does the GC really need this?
+ */
+void os_lowerThreadPriority(int oldThreadPriority);
+
+/*
+ * Changes the priority of a system thread to match that of the Thread object.
+ *
+ * We map a priority value from 1-10 to Linux "nice" values, where lower
+ * numbers indicate higher priority.
+ */
+void os_changeThreadPriority(Thread* thread, int newPriority);
+
+/*
+ * Returns the thread priority for the current thread by querying the system.
+ * This is useful when attaching a thread through JNI.
+ *
+ * Returns a value from 1 to 10 (compatible with java.lang.Thread values).
+ */
+int os_getThreadPriorityFromSystem();