diff --git a/core/envsetup.mk b/core/envsetup.mk
index 3509a8c..74e9100 100644
--- a/core/envsetup.mk
+++ b/core/envsetup.mk
@@ -253,6 +253,8 @@
 TARGET_INSTALLER_ROOT_OUT := $(TARGET_INSTALLER_OUT)/root
 TARGET_INSTALLER_SYSTEM_OUT := $(TARGET_INSTALLER_OUT)/root/system
 
+TARGET_FACTORY_RAMDISK_OUT := $(PRODUCT_OUT)/factory_ramdisk
+
 COMMON_MODULE_CLASSES := TARGET-NOTICE_FILES HOST-NOTICE_FILES HOST-JAVA_LIBRARIES
 
 ifeq (,$(strip $(DIST_DIR)))
diff --git a/core/main.mk b/core/main.mk
index 97d3d7e..48639b5 100644
--- a/core/main.mk
+++ b/core/main.mk
@@ -727,6 +727,9 @@
 .PHONY: ramdisk
 ramdisk: $(INSTALLED_RAMDISK_TARGET)
 
+.PHONY: factory_ramdisk
+factory_ramdisk: $(INSTALLED_FACTORY_RAMDISK_TARGET)
+
 .PHONY: systemtarball
 systemtarball: $(INSTALLED_SYSTEMTARBALL_TARGET)
 
@@ -807,6 +810,7 @@
     $(BUILT_TARGET_FILES_PACKAGE) \
     $(INSTALLED_ANDROID_INFO_TXT_TARGET) \
     $(INSTALLED_RAMDISK_TARGET) \
+    $(INSTALLED_FACTORY_RAMDISK_TARGET) \
    )
 
 # Building a full system-- the default is to build droidcore
diff --git a/core/product.mk b/core/product.mk
index 561003d..23dc375 100644
--- a/core/product.mk
+++ b/core/product.mk
@@ -85,6 +85,7 @@
     PRODUCT_DEFAULT_WIFI_CHANNELS \
     PRODUCT_DEFAULT_DEV_CERTIFICATE \
     PRODUCT_RESTRICT_VENDOR_FILES \
+    PRODUCT_FACTORY_RAMDISK_MODULES \
 
 
 define dump-product
diff --git a/core/tasks/factory_ramdisk.mk b/core/tasks/factory_ramdisk.mk
new file mode 100644
index 0000000..c4d792c
--- /dev/null
+++ b/core/tasks/factory_ramdisk.mk
@@ -0,0 +1,51 @@
+#
+# 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.
+#
+
+# PRODUCT_FACTORY_RAMDISK_MODULES consists of "<module_name>:<install_path>" pairs.
+# <install_path> is relative to TARGET_FACTORY_RAMDISK_OUT.
+# For example:
+# PRODUCT_FACTORY_RAMDISK_MODULES := \
+#     toolbox:bin/toolbox adbd:sbin/adbd adb:bin/adb
+factory_ramdisk_modules := $(strip $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_FACTORY_RAMDISK_MODULES))
+ifneq (,$(factory_ramdisk_modules))
+INTERNAL_FACTORY_RAMDISK_EXTRA_MODULES_FILES :=
+$(foreach m, $(factory_ramdisk_modules), \
+    $(eval _fr_m_name := $(call word-colon,1,$(m))) \
+    $(eval _fr_dest := $(call word-colon,2,$(m))) \
+    $(eval _fr_m_built := $(filter $(PRODUCT_OUT)/%, $(ALL_MODULES.$(_fr_m_name).BUILT))) \
+    $(if $(_fr_m_built), \
+        $(eval _fulldest := $(TARGET_FACTORY_RAMDISK_OUT)/$(_fr_dest)) \
+        $(eval $(call copy-one-file,$(_fr_m_built),$(_fulldest))) \
+        $(eval INTERNAL_FACTORY_RAMDISK_EXTRA_MODULES_FILES += $(_fulldest)), \
+        $(error Error: module "$(m)" in PRODUCT_FACTORY_RAMDISK_MODULES is not a target module!) \
+    ))
+endif
+
+# Files may also be installed via PRODUCT_COPY_FILES, PRODUCT_PACKAGES etc.
+INTERNAL_FACTORY_RAMDISK_FILES := $(filter $(TARGET_FACTORY_RAMDISK_OUT)/%, \
+    $(ALL_DEFAULT_INSTALLED_MODULES))
+
+ifneq (,$(INTERNAL_FACTORY_RAMDISK_EXTRA_MODULES_FILES)$(INTERNAL_FACTORY_RAMDISK_FILES))
+
+BUILT_FACTORY_RAMDISK_TARGET := $(PRODUCT_OUT)/factory_ramdisk.img
+
+INSTALLED_FACTORY_RAMDISK_TARGET := $(BUILT_FACTORY_RAMDISK_TARGET)
+$(INSTALLED_FACTORY_RAMDISK_TARGET) : $(MKBOOTFS) \
+    $(INTERNAL_FACTORY_RAMDISK_EXTRA_MODULES_FILES) $(INTERNAL_FACTORY_RAMDISK_FILES) | $(MINIGZIP)
+	$(call pretty,"Target factory ram disk: $@")
+	$(hide) $(MKBOOTFS) $(TARGET_FACTORY_RAMDISK_OUT) | $(MINIGZIP) > $@
+
+endif