diff --git a/cross/armel/sources.list.jessie b/cross/armel/sources.list.jessie
new file mode 100644
index 00000000000..3d9c3059d89
--- /dev/null
+++ b/cross/armel/sources.list.jessie
@@ -0,0 +1,3 @@
+# Debian (jessie)   # Stable
+deb http://ftp.debian.org/debian/ jessie main contrib non-free
+deb-src http://ftp.debian.org/debian/ jessie main contrib non-free
diff --git a/cross/armel/tizen-build-rootfs.sh b/cross/armel/tizen-build-rootfs.sh
new file mode 100755
index 00000000000..87c48e78fbb
--- /dev/null
+++ b/cross/armel/tizen-build-rootfs.sh
@@ -0,0 +1,44 @@
+#!/usr/bin/env bash
+set -e
+
+__ARM_SOFTFP_CrossDir=$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )
+__TIZEN_CROSSDIR="$__ARM_SOFTFP_CrossDir/tizen"
+
+if [[ -z "$ROOTFS_DIR" ]]; then
+    echo "ROOTFS_DIR is not defined."
+    exit 1;
+fi
+
+# Clean-up (TODO-Cleanup: We may already delete  $ROOTFS_DIR at ./cross/build-rootfs.sh.)
+# hk0110
+if [ -d "$ROOTFS_DIR" ]; then
+    umount $ROOTFS_DIR/*
+    rm -rf $ROOTFS_DIR
+fi
+
+TIZEN_TMP_DIR=$ROOTFS_DIR/tizen_tmp
+mkdir -p $TIZEN_TMP_DIR
+
+# Download files
+echo ">>Start downloading files"
+VERBOSE=1 $__ARM_SOFTFP_CrossDir/tizen-fetch.sh $TIZEN_TMP_DIR
+echo "<<Finish downloading files"
+
+echo ">>Start constructing Tizen rootfs"
+TIZEN_RPM_FILES=`ls $TIZEN_TMP_DIR/*.rpm`
+cd $ROOTFS_DIR
+for f in $TIZEN_RPM_FILES; do
+    rpm2cpio $f  | cpio -idm --quiet
+done
+echo "<<Finish constructing Tizen rootfs"
+
+# Cleanup tmp
+rm -rf $TIZEN_TMP_DIR
+
+# Configure Tizen rootfs
+echo ">>Start configuring Tizen rootfs"
+rm ./usr/lib/libunwind.so
+ln -s libunwind.so.8 ./usr/lib/libunwind.so
+ln -sfn asm-arm ./usr/include/asm
+patch -p1 < $__TIZEN_CROSSDIR/tizen.patch
+echo "<<Finish configuring Tizen rootfs"
diff --git a/cross/armel/tizen-fetch.sh b/cross/armel/tizen-fetch.sh
new file mode 100755
index 00000000000..12521994811
--- /dev/null
+++ b/cross/armel/tizen-fetch.sh
@@ -0,0 +1,174 @@
+#!/usr/bin/env bash
+set -e
+
+if [[ -z "${VERBOSE// }" ]] || [ "$VERBOSE" -ne "$VERBOSE" ] 2>/dev/null; then
+	VERBOSE=0
+fi
+
+Log()
+{
+	if [ $VERBOSE -ge $1 ]; then
+		echo ${@:2}
+	fi
+}
+
+Inform()
+{
+	Log 1 -e "\x1B[0;34m$@\x1B[m"
+}
+
+Debug()
+{
+	Log 2 -e "\x1B[0;32m$@\x1B[m"
+}
+
+Error()
+{
+	>&2 Log 0 -e "\x1B[0;31m$@\x1B[m"
+}
+
+Fetch()
+{
+	URL=$1
+	FILE=$2
+	PROGRESS=$3
+	if [ $VERBOSE -ge 1 ] && [ $PROGRESS ]; then
+		CURL_OPT="--progress-bar"
+	else
+		CURL_OPT="--silent"
+	fi
+	curl $CURL_OPT $URL > $FILE
+}
+
+hash curl 2> /dev/null || { Error "Require 'curl' Aborting."; exit 1; }
+hash xmllint 2> /dev/null || { Error "Require 'xmllint' Aborting."; exit 1; }
+hash sha256sum 2> /dev/null || { Error "Require 'sha256sum' Aborting."; exit 1; }
+
+TMPDIR=$1
+if [ ! -d $TMPDIR ]; then
+	TMPDIR=./tizen_tmp
+	Debug "Create temporary directory : $TMPDIR"
+	mkdir -p $TMPDIR 
+fi
+
+TIZEN_URL=http://download.tizen.org/releases/weekly/tizen
+BUILD_XML=build.xml
+REPOMD_XML=repomd.xml
+PRIMARY_XML=primary.xml
+TARGET_URL="http://__not_initialized"
+
+Xpath_get()
+{
+	XPATH_RESULT=''
+	XPATH=$1
+	XML_FILE=$2
+	RESULT=$(xmllint --xpath $XPATH $XML_FILE)
+	if [[ -z ${RESULT// } ]]; then
+		Error "Can not find target from $XML_FILE"
+		Debug "Xpath = $XPATH"
+		exit 1
+	fi
+	XPATH_RESULT=$RESULT
+}
+
+fetch_tizen_pkgs_init()
+{
+	TARGET=$1
+	PROFILE=$2
+	Debug "Initialize TARGET=$TARGET, PROFILE=$PROFILE"
+
+	TMP_PKG_DIR=$TMPDIR/tizen_${PROFILE}_pkgs
+	if [ -d $TMP_PKG_DIR ]; then rm -rf $TMP_PKG_DIR; fi
+	mkdir -p $TMP_PKG_DIR
+
+	PKG_URL=$TIZEN_URL/$PROFILE/latest
+
+	BUILD_XML_URL=$PKG_URL/$BUILD_XML
+	TMP_BUILD=$TMP_PKG_DIR/$BUILD_XML
+	TMP_REPOMD=$TMP_PKG_DIR/$REPOMD_XML
+	TMP_PRIMARY=$TMP_PKG_DIR/$PRIMARY_XML
+	TMP_PRIMARYGZ=${TMP_PRIMARY}.gz
+
+	Fetch $BUILD_XML_URL $TMP_BUILD
+
+	Debug "fetch $BUILD_XML_URL to $TMP_BUILD"
+
+	TARGET_XPATH="//build/buildtargets/buildtarget[@name=\"$TARGET\"]/repo[@type=\"binary\"]/text()"
+	Xpath_get $TARGET_XPATH $TMP_BUILD
+	TARGET_PATH=$XPATH_RESULT
+	TARGET_URL=$PKG_URL/$TARGET_PATH
+
+	REPOMD_URL=$TARGET_URL/repodata/repomd.xml
+	PRIMARY_XPATH='string(//*[local-name()="data"][@type="primary"]/*[local-name()="location"]/@href)'
+
+	Fetch $REPOMD_URL $TMP_REPOMD
+
+	Debug "fetch $REPOMD_URL to $TMP_REPOMD"
+
+	Xpath_get $PRIMARY_XPATH $TMP_REPOMD
+	PRIMARY_XML_PATH=$XPATH_RESULT
+	PRIMARY_URL=$TARGET_URL/$PRIMARY_XML_PATH
+
+	Fetch $PRIMARY_URL $TMP_PRIMARYGZ
+
+	Debug "fetch $PRIMARY_URL to $TMP_PRIMARYGZ"
+
+	gunzip $TMP_PRIMARYGZ 
+
+	Debug "unzip $TMP_PRIMARYGZ to $TMP_PRIMARY" 
+}
+
+fetch_tizen_pkgs()
+{
+	PROFILE=$1
+	PACKAGE_XPATH_TPL='string(//*[local-name()="metadata"]/*[local-name()="package"][*[local-name()="name"][text()="_PKG_"]]/*[local-name()="location"]/@href)'
+
+	PACKAGE_CHECKSUM_XPATH_TPL='string(//*[local-name()="metadata"]/*[local-name()="package"][*[local-name()="name"][text()="_PKG_"]]/*[local-name()="checksum"]/text())'
+
+	for pkg in ${@:2}
+	do
+		Inform "Fetching... $pkg"
+		XPATH=${PACKAGE_XPATH_TPL/_PKG_/$pkg}
+		Xpath_get $XPATH $TMP_PRIMARY
+		PKG_PATH=$XPATH_RESULT
+
+		XPATH=${PACKAGE_CHECKSUM_XPATH_TPL/_PKG_/$pkg}
+		Xpath_get $XPATH $TMP_PRIMARY
+		CHECKSUM=$XPATH_RESULT
+
+		PKG_URL=$TARGET_URL/$PKG_PATH
+		PKG_FILE=$(basename $PKG_PATH)
+		PKG_PATH=$TMPDIR/$PKG_FILE
+
+		Debug "Download $PKG_URL to $PKG_PATH"
+		Fetch $PKG_URL $PKG_PATH true
+		
+		echo "$CHECKSUM $PKG_PATH" | sha256sum -c - > /dev/null
+		if [ $? -ne 0 ]; then
+			Error "Fail to fetch $PKG_URL to $PKG_PATH"
+			Debug "Checksum = $CHECKSUM"
+			exit 1
+		fi
+
+	done
+}
+
+Inform "Initialize arm base"
+fetch_tizen_pkgs_init arm base
+Inform "fetch base common packages"
+fetch_tizen_pkgs base gcc glibc glibc-devel linux-glibc-devel
+Inform "fetch base coreclr packages"
+fetch_tizen_pkgs base lldb lldb-devel libuuid libuuid-devel libgcc libstdc++ libstdc++-devel
+Inform "fetch base corefx packages"
+fetch_tizen_pkgs base libcom_err libcom_err-devel zlib zlib-devel libopenssl libopenssl-devel
+
+Inform "initialize arm mobile"
+fetch_tizen_pkgs_init arm-wayland mobile
+Inform "fetch mobile common packages"
+fetch_tizen_pkgs mobile libicu-devel
+Inform "fetch mobile coreclr packages"
+fetch_tizen_pkgs mobile libunwind libunwind-devel tizen-release
+Inform "fetch mobile corefx packages"
+fetch_tizen_pkgs mobile gssdp gssdp-devel krb5 krb5-devel libcurl libcurl-devel
+
+
diff --git a/cross/armel/tizen/tizen.patch b/cross/armel/tizen/tizen.patch
new file mode 100644
index 00000000000..c92dc02809a
--- /dev/null
+++ b/cross/armel/tizen/tizen.patch
@@ -0,0 +1,33 @@
+diff -u -r a/usr/lib/libc.so b/usr/lib/libc.so
+--- a/usr/lib/libc.so	2016-12-30 23:00:08.284951863 +0900
++++ b/usr/lib/libc.so	2016-12-30 23:00:32.140951815 +0900
+@@ -2,4 +2,4 @@
+    Use the shared library, but some functions are only in
+    the static library, so try that secondarily.  */
+ OUTPUT_FORMAT(elf32-littlearm)
+-GROUP ( /lib/libc.so.6 /usr/lib/libc_nonshared.a  AS_NEEDED ( /lib/ld-linux.so.3 ) )
++GROUP ( libc.so.6 libc_nonshared.a  AS_NEEDED ( ld-linux.so.3 ) )
+diff -u -r a/usr/lib/libpthread.so b/usr/lib/libpthread.so
+--- a/usr/lib/libpthread.so	2016-12-30 23:00:19.408951841 +0900
++++ b/usr/lib/libpthread.so	2016-12-30 23:00:39.068951801 +0900
+@@ -2,4 +2,4 @@
+    Use the shared library, but some functions are only in
+    the static library, so try that secondarily.  */
+ OUTPUT_FORMAT(elf32-littlearm)
+-GROUP ( /lib/libpthread.so.0 /usr/lib/libpthread_nonshared.a )
++GROUP ( libpthread.so.0 libpthread_nonshared.a )
+diff -u -r a/usr/lib/libpthread.so b/usr/lib/libpthread.so
+--- a/etc/os-release  2016-10-17 23:39:36.000000000 +0900
++++ b/etc/os-release  2017-01-05 14:34:39.099867682 +0900
+@@ -1,7 +1,7 @@
+ NAME=Tizen
+-VERSION="3.0.0 (Tizen3/Mobile)"
++VERSION="4.0.0 (Tizen4/Mobile)"
+ ID=tizen
+-VERSION_ID=3.0.0
+-PRETTY_NAME="Tizen 3.0.0 (Tizen3/Mobile)"
++VERSION_ID=4.0.0
++PRETTY_NAME="Tizen 4.0.0 (Tizen4/Mobile)"
+ ANSI_COLOR="0;36"
+-CPE_NAME="cpe:/o:tizen:tizen:3.0.0"
++CPE_NAME="cpe:/o:tizen:tizen:4.0.0"
diff --git a/cross/armel/toolchain.cmake b/cross/armel/toolchain.cmake
new file mode 100644
index 00000000000..95bff0878b4
--- /dev/null
+++ b/cross/armel/toolchain.cmake
@@ -0,0 +1,59 @@
+set(CROSS_ROOTFS $ENV{ROOTFS_DIR})
+
+set(CMAKE_SYSTEM_NAME Linux)
+set(CMAKE_SYSTEM_VERSION 1)
+set(CMAKE_SYSTEM_PROCESSOR armv7l)
+
+## Specify the toolchain
+set(TOOLCHAIN "arm-linux-gnueabi")
+set(TOOLCHAIN_PREFIX ${TOOLCHAIN}-)
+#set(CMAKE_C_COMPILER ${TOOLCHAIN_PREFIX}gcc)
+#set(CMAKE_CXX_COMPILER ${TOOLCHAIN_PREFIX}g++)
+#set(CMAKE_ASM_COMPILER ${TOOLCHAIN_PREFIX}as)
+#set(CMAKE_AR ${TOOLCHAIN_PREFIX}ar)
+#set(CMAKE_OBJCOPY ${TOOLCHAIN_PREFIX}objcopy)
+#set(CMAKE_OBJDUMP ${TOOLCHAIN_PREFIX}objdump)
+
+add_compile_options(-target armv7-linux-gnueabi)
+add_compile_options(-mthumb)
+add_compile_options(-mfpu=vfpv3)
+add_compile_options(--sysroot=${CROSS_ROOTFS})
+
+set(CROSS_LINK_FLAGS "${CROSS_LINK_FLAGS} -target ${TOOLCHAIN}")
+set(CROSS_LINK_FLAGS "${CROSS_LINK_FLAGS} --sysroot=${CROSS_ROOTFS}")
+
+if("$ENV{__DistroRid}" MATCHES "tizen.*")
+    add_compile_options(-I$ENV{ROOTFS_DIR}/usr/lib/gcc/armv7l-tizen-linux-gnueabi/4.9.2/include/c++/)
+    add_compile_options(-I$ENV{ROOTFS_DIR}/usr/lib/gcc/armv7l-tizen-linux-gnueabi/4.9.2/include/c++/armv7l-tizen-linux-gnueabi)
+    add_compile_options(-Wno-deprecated-declarations) # compile-time option
+    add_compile_options(-D__extern_always_inline=inline)
+    set(TIZEN_TOOLCHAIN "armv7l-tizen-linux-gnueabi/4.9.2")
+    set(CROSS_LINK_FLAGS "${CROSS_LINK_FLAGS} -B${CROSS_ROOTFS}/usr/lib/gcc/${TIZEN_TOOLCHAIN}")
+    set(CROSS_LINK_FLAGS "${CROSS_LINK_FLAGS} -L${CROSS_ROOTFS}/usr/lib/gcc/${TIZEN_TOOLCHAIN}")
+else()
+    # TODO: this setting assumes debian armel rootfs
+    include_directories(SYSTEM ${CROSS_ROOTFS}/usr/include/c++/4.9 ${CROSS_ROOTFS}/usr/include/${TOOLCHAIN}/c++/4.9 )   
+    set(CROSS_LINK_FLAGS "${CROSS_LINK_FLAGS} -B${CROSS_ROOTFS}/usr/lib/gcc/${TOOLCHAIN}/4.9")
+    set(CROSS_LINK_FLAGS "${CROSS_LINK_FLAGS} -L${CROSS_ROOTFS}/usr/lib/gcc/${TOOLCHAIN}/4.9")
+endif()
+
+set(CMAKE_EXE_LINKER_FLAGS    "${CMAKE_EXE_LINKER_FLAGS}    ${CROSS_LINK_FLAGS}" CACHE STRING "" FORCE)
+set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} ${CROSS_LINK_FLAGS}" CACHE STRING "" FORCE)
+set(CMAKE_MODULE_LINKER_FLAGS "${CMAKE_MODULE_LINKER_FLAGS} ${CROSS_LINK_FLAGS}" CACHE STRING "" FORCE)
+
+set(CMAKE_FIND_ROOT_PATH "${CROSS_ROOTFS}")
+set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
+set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
+set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
+set(CMAKE_FIND_ROOT_PATH_MODE_PACKAGE ONLY)
+
+set(LLVM_ARM_DIR "$ENV{LLVM_ARM_HOME}")
+if(LLVM_ARM_DIR)
+    set(WITH_LLDB_LIBS "${LLVM_ARM_DIR}/lib/" CACHE STRING "")
+    set(WITH_LLDB_INCLUDES "${LLVM_ARM_DIR}/include" CACHE STRING "")
+    set(LLDB_H "${WITH_LLDB_INCLUDES}" CACHE STRING "")
+    set(LLDB "${LLVM_ARM_DIR}/lib/liblldb.so" CACHE STRING "")
+else()
+    set(WITH_LLDB_LIBS "${CROSS_ROOTFS}/usr/lib/${TOOLCHAIN}" CACHE STRING "")
+    set(WITH_LLDB_INCLUDES "${CROSS_ROOTFS}/usr/lib/llvm-3.6/include" CACHE STRING "")
+endif()
diff --git a/cross/armel/tryrun.cmake b/cross/armel/tryrun.cmake
new file mode 100644
index 00000000000..26a30e5e409
--- /dev/null
+++ b/cross/armel/tryrun.cmake
@@ -0,0 +1,123 @@
+SET( REALPATH_SUPPORTS_NONEXISTENT_FILES_EXITCODE 
+     1
+     CACHE STRING "Result from TRY_RUN" FORCE)
+
+SET( SSCANF_SUPPORT_ll_EXITCODE 
+     0
+     CACHE STRING "Result from TRY_RUN" FORCE)
+
+SET( SSCANF_CANNOT_HANDLE_MISSING_EXPONENT_EXITCODE 
+     1
+     CACHE STRING "Result from TRY_RUN" FORCE)
+
+SET( HAVE_LARGE_SNPRINTF_SUPPORT_EXITCODE 
+     0
+     CACHE STRING "Result from TRY_RUN" FORCE)
+
+SET( HAVE_SCHED_GET_PRIORITY_EXITCODE 
+     0
+     CACHE STRING "Result from TRY_RUN" FORCE)
+
+SET( HAVE_WORKING_GETTIMEOFDAY_EXITCODE 
+     0
+     CACHE STRING "Result from TRY_RUN" FORCE)
+
+SET( HAVE_WORKING_CLOCK_GETTIME_EXITCODE 
+     0
+     CACHE STRING "Result from TRY_RUN" FORCE)
+
+SET( HAVE_CLOCK_MONOTONIC_EXITCODE 
+     0
+     CACHE STRING "Result from TRY_RUN" FORCE)
+
+SET( HAVE_MMAP_DEV_ZERO_EXITCODE 
+     0
+     CACHE STRING "Result from TRY_RUN" FORCE)
+
+SET( ONE_SHARED_MAPPING_PER_FILEREGION_PER_PROCESS_EXITCODE 
+     1
+     CACHE STRING "Result from TRY_RUN" FORCE)
+
+SET( PTHREAD_CREATE_MODIFIES_ERRNO_EXITCODE 
+     1
+     CACHE STRING "Result from TRY_RUN" FORCE)
+
+SET( SEM_INIT_MODIFIES_ERRNO_EXITCODE 
+     1
+     CACHE STRING "Result from TRY_RUN" FORCE)
+
+SET( HAVE_COMPATIBLE_ACOS_EXITCODE 
+     0
+     CACHE STRING "Result from TRY_RUN" FORCE)
+
+SET( HAVE_COMPATIBLE_ASIN_EXITCODE 
+     0
+     CACHE STRING "Result from TRY_RUN" FORCE)
+
+SET( HAVE_COMPATIBLE_POW_EXITCODE 
+     1
+     CACHE STRING "Result from TRY_RUN" FORCE)
+
+SET( HAVE_VALID_NEGATIVE_INF_POW_EXITCODE 
+     0
+     CACHE STRING "Result from TRY_RUN" FORCE)
+
+SET( HAVE_VALID_POSITIVE_INF_POW_EXITCODE 
+     0
+     CACHE STRING "Result from TRY_RUN" FORCE)
+
+SET( HAVE_COMPATIBLE_ATAN2_EXITCODE 
+     0
+     CACHE STRING "Result from TRY_RUN" FORCE)
+
+SET( HAVE_COMPATIBLE_LOG_EXITCODE 
+     0
+     CACHE STRING "Result from TRY_RUN" FORCE)
+
+SET( HAVE_COMPATIBLE_LOG10_EXITCODE 
+     0
+     CACHE STRING "Result from TRY_RUN" FORCE)
+
+SET( UNGETC_NOT_RETURN_EOF_EXITCODE 
+     0
+     CACHE STRING "Result from TRY_RUN" FORCE)
+
+SET( HAS_POSIX_SEMAPHORES_EXITCODE 
+     0
+     CACHE STRING "Result from TRY_RUN" FORCE)
+
+SET( GETPWUID_R_SETS_ERRNO_EXITCODE 
+     0
+     CACHE STRING "Result from TRY_RUN" FORCE)
+
+SET( FILE_OPS_CHECK_FERROR_OF_PREVIOUS_CALL_EXITCODE 
+     1
+     CACHE STRING "Result from TRY_RUN" FORCE)
+
+SET( HAVE_CLOCK_THREAD_CPUTIME_EXITCODE
+     0
+     CACHE STRING "Result from TRY_RUN" FORCE)
+
+SET( HAVE_SCHED_GETCPU_EXITCODE
+     0
+     CACHE STRING "Result from TRY_RUN" FORCE)
+
+SET( HAVE_CLOCK_MONOTONIC_COARSE_EXITCODE
+     0
+     CACHE STRING "Result from TRY_RUN" FORCE)
+
+SET( HAVE_PROCFS_CTL_EXITCODE
+     1
+     CACHE STRING "Result from TRY_RUN" FORCE)
+
+SET( HAVE_PROCFS_MAPS_EXITCODE
+     0
+     CACHE STRING "Result from TRY_RUN" FORCE)
+
+SET( HAVE_PROCFS_STAT_EXITCODE
+     0
+     CACHE STRING "Result from TRY_RUN" FORCE)
+
+SET( HAVE_PROCFS_STATUS_EXITCODE
+     0
+     CACHE STRING "Result from TRY_RUN" FORCE)
diff --git a/cross/build-rootfs.sh b/cross/build-rootfs.sh
index 78309f766a5..16c67b116d9 100755
--- a/cross/build-rootfs.sh
+++ b/cross/build-rootfs.sh
@@ -14,8 +14,11 @@ __BuildArch=arm
 __UbuntuArch=armhf
 __UbuntuRepo="http://ports.ubuntu.com/"
 __UbuntuPackages="build-essential lldb-3.6-dev libunwind8-dev gettext symlinks liblttng-ust-dev libicu-dev"
+__LLDB_Package="lldb-3.6-dev"
 __MachineTriple=arm-linux-gnueabihf
 __UnprocessedBuildArgs=
+__SkipUnmount=0
+
 for i in "$@"
     do
         lowerI="$(echo $i | awk '{print tolower($0)}')"
@@ -38,22 +41,84 @@ for i in "$@"
         __UbuntuPackages="build-essential libunwind8-dev gettext symlinks liblttng-ust-dev libicu-dev"
         __MachineTriple=aarch64-linux-gnu
         ;;
+        armel)
+            __BuildArch=armel
+            __UbuntuArch=armel
+            __UbuntuRepo="http://ftp.debian.org/debian/"
+            __LinuxCodeName=jessie
+            ;;
+        lldb3.6)
+            __LLDB_Package="lldb-3.6-dev"
+            ;;
+        lldb3.8)
+            __LLDB_Package="lldb-3.8-dev"
+            ;;
+        vivid)
+            if [ "$__LinuxCodeName" != "jessie" ]; then
+                __LinuxCodeName=vivid
+            fi
+            ;;
+        wily)
+            if [ "$__LinuxCodeName" != "jessie" ]; then
+                __LinuxCodeName=wily
+            fi
+            ;;
+        xenial)
+            if [ "$__LinuxCodeName" != "jessie" ]; then
+                __LinuxCodeName=xenial
+            fi
+            ;;
+        jessie)
+            __LinuxCodeName=jessie
+            __UbuntuRepo="http://ftp.debian.org/debian/"
+            ;;
+        tizen)
+            if [ "$__BuildArch" != "armel" ]; then
+                echo "Tizen is available only for armel."
+                usage;
+                exit 1;
+            fi
+            __LinuxCodeName=
+            __UbuntuRepo=
+            __Tizen=tizen
+            ;;
+        --skipunmount)
+            __SkipUnmount=1
+            ;;
         *)
         __UnprocessedBuildArgs="$__UnprocessedBuildArgs $i"
     esac
 done
 
+if [ "$__BuildArch" == "armel" ]; then
+    __LLDB_Package="lldb-3.5-dev"
+fi
+
 __RootfsDir="$__CrossDir/rootfs/$__BuildArch"
+__UbuntuPackages="$__UbuntuPackagesBase $__LLDB_Package"
+
 
 if [[ -n "$ROOTFS_DIR" ]]; then
     __RootfsDir=$ROOTFS_DIR
 fi
 
-umount $__RootfsDir/*
-rm -rf $__RootfsDir
-qemu-debootstrap --arch $__UbuntuArch trusty $__RootfsDir $__UbuntuRepo
-cp $__CrossDir/$__BuildArch/sources.list $__RootfsDir/etc/apt/sources.list
-chroot $__RootfsDir apt-get update
-chroot $__RootfsDir apt-get -y install $__UbuntuPackages
-chroot $__RootfsDir symlinks -cr /usr
-umount $__RootfsDir/*
\ No newline at end of file
+if [ -d "$__RootfsDir" ]; then
+    if [ $__SkipUnmount == 0 ]; then
+        umount $__RootfsDir/*
+    fi
+    rm -rf $__RootfsDir
+fi
+
+if [ "$__Tizen" == "tizen" ]; then
+    ROOTFS_DIR=$__RootfsDir $__CrossDir/$__BuildArch/tizen-build-rootfs.sh
+else
+    qemu-debootstrap --arch $__UbuntuArch trusty $__RootfsDir $__UbuntuRepo
+    cp $__CrossDir/$__BuildArch/sources.list $__RootfsDir/etc/apt/sources.list
+    chroot $__RootfsDir apt-get update
+    chroot $__RootfsDir apt-get -y install $__UbuntuPackages
+    chroot $__RootfsDir symlinks -cr /usr
+
+    if [ $__SkipUnmount == 0 ]; then
+        umount $__RootfsDir/*
+    fi
+fi
diff --git a/src/Native/Runtime/PalRedhawkCommon.h b/src/Native/Runtime/PalRedhawkCommon.h
index de0406a2a54..36f28e85631 100644
--- a/src/Native/Runtime/PalRedhawkCommon.h
+++ b/src/Native/Runtime/PalRedhawkCommon.h
@@ -62,6 +62,7 @@ struct PAL_LIMITED_CONTEXT
     UIntNative GetSp() const { return SP; }
     UIntNative GetFp() const { return R7; }
     UIntNative GetLr() const { return LR; }
+    void SetIp(UIntNative ip) { IP = ip; }
 #elif defined(_TARGET_ARM64_)
     // @TODO: Add ARM64 registers
     UIntNative IP;
diff --git a/src/Native/Runtime/arm/AllocFast.S b/src/Native/Runtime/arm/AllocFast.S
new file mode 100644
index 00000000000..de818954b6a
--- /dev/null
+++ b/src/Native/Runtime/arm/AllocFast.S
@@ -0,0 +1,7 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+#include <unixasmmacros.inc>
+
+// TODO: Implement Arm support
diff --git a/src/Native/Runtime/arm/AsmOffsetsCpu.h b/src/Native/Runtime/arm/AsmOffsetsCpu.h
index 1c1d1978cd2..52f5bb575db 100644
--- a/src/Native/Runtime/arm/AsmOffsetsCpu.h
+++ b/src/Native/Runtime/arm/AsmOffsetsCpu.h
@@ -8,7 +8,7 @@
 //
 // NOTE: the offsets MUST be in hex notation WITHOUT the 0x prefix
 
-PLAT_ASM_SIZEOF(130, ExInfo)
+PLAT_ASM_SIZEOF(148, ExInfo)
 PLAT_ASM_OFFSET(0, ExInfo, m_pPrevExInfo)
 PLAT_ASM_OFFSET(4, ExInfo, m_pExContext)
 PLAT_ASM_OFFSET(8, ExInfo, m_exception)
@@ -16,7 +16,7 @@ PLAT_ASM_OFFSET(0c, ExInfo, m_kind)
 PLAT_ASM_OFFSET(0d, ExInfo, m_passNumber)
 PLAT_ASM_OFFSET(10, ExInfo, m_idxCurClause)
 PLAT_ASM_OFFSET(18, ExInfo, m_frameIter)
-PLAT_ASM_OFFSET(128, ExInfo, m_notifyDebuggerSP)
+PLAT_ASM_OFFSET(140, ExInfo, m_notifyDebuggerSP)
 
 PLAT_ASM_OFFSET(4, PInvokeTransitionFrame, m_RIP)
 PLAT_ASM_OFFSET(8, PInvokeTransitionFrame, m_FramePointer)
@@ -24,7 +24,7 @@ PLAT_ASM_OFFSET(0c, PInvokeTransitionFrame, m_pThread)
 PLAT_ASM_OFFSET(10, PInvokeTransitionFrame, m_dwFlags)
 PLAT_ASM_OFFSET(14, PInvokeTransitionFrame, m_PreservedRegs)
 
-PLAT_ASM_SIZEOF(110, StackFrameIterator)
+PLAT_ASM_SIZEOF(128, StackFrameIterator)
 PLAT_ASM_OFFSET(08, StackFrameIterator, m_FramePointer)
 PLAT_ASM_OFFSET(0c, StackFrameIterator, m_ControlPC)
 PLAT_ASM_OFFSET(10, StackFrameIterator, m_RegDisplay)
@@ -44,7 +44,7 @@ PLAT_ASM_OFFSET(20, PAL_LIMITED_CONTEXT, R11)
 PLAT_ASM_OFFSET(28, PAL_LIMITED_CONTEXT, SP)
 PLAT_ASM_OFFSET(2c, PAL_LIMITED_CONTEXT, LR)
 
-PLAT_ASM_SIZEOF(88, REGDISPLAY)
+PLAT_ASM_SIZEOF(a0, REGDISPLAY)
 PLAT_ASM_OFFSET(38, REGDISPLAY, SP)
 
 PLAT_ASM_OFFSET(10, REGDISPLAY, pR4)
diff --git a/src/Native/Runtime/arm/CallDescrWorker.S b/src/Native/Runtime/arm/CallDescrWorker.S
new file mode 100644
index 00000000000..de818954b6a
--- /dev/null
+++ b/src/Native/Runtime/arm/CallDescrWorker.S
@@ -0,0 +1,7 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+#include <unixasmmacros.inc>
+
+// TODO: Implement Arm support
diff --git a/src/Native/Runtime/arm/CallingConventionConverterHelpers.S b/src/Native/Runtime/arm/CallingConventionConverterHelpers.S
new file mode 100644
index 00000000000..de818954b6a
--- /dev/null
+++ b/src/Native/Runtime/arm/CallingConventionConverterHelpers.S
@@ -0,0 +1,7 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+#include <unixasmmacros.inc>
+
+// TODO: Implement Arm support
diff --git a/src/Native/Runtime/arm/ExceptionHandling.S b/src/Native/Runtime/arm/ExceptionHandling.S
new file mode 100644
index 00000000000..de818954b6a
--- /dev/null
+++ b/src/Native/Runtime/arm/ExceptionHandling.S
@@ -0,0 +1,7 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+#include <unixasmmacros.inc>
+
+// TODO: Implement Arm support
diff --git a/src/Native/Runtime/arm/PInvoke.S b/src/Native/Runtime/arm/PInvoke.S
new file mode 100644
index 00000000000..de818954b6a
--- /dev/null
+++ b/src/Native/Runtime/arm/PInvoke.S
@@ -0,0 +1,7 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+#include <unixasmmacros.inc>
+
+// TODO: Implement Arm support
diff --git a/src/Native/Runtime/arm/UniversalTransition.S b/src/Native/Runtime/arm/UniversalTransition.S
new file mode 100644
index 00000000000..de818954b6a
--- /dev/null
+++ b/src/Native/Runtime/arm/UniversalTransition.S
@@ -0,0 +1,7 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+#include <unixasmmacros.inc>
+
+// TODO: Implement Arm support
diff --git a/src/Native/Runtime/coreclr/gcinfodecoder.cpp b/src/Native/Runtime/coreclr/gcinfodecoder.cpp
index 1a8eb7ecaad..c9eddc2242a 100644
--- a/src/Native/Runtime/coreclr/gcinfodecoder.cpp
+++ b/src/Native/Runtime/coreclr/gcinfodecoder.cpp
@@ -1476,7 +1476,11 @@ OBJECTREF* GcInfoDecoder::GetRegisterSlot(
     _ASSERTE(regNum >= 0 && regNum <= 14);
     _ASSERTE(regNum != 13);  // sp
 
+#ifdef FEATURE_REDHAWK
+    PTR_UIntNative *ppReg;
+#else
     DWORD **ppReg;
+#endif
 
     if(regNum <= 3)
     {
diff --git a/src/Native/Runtime/regdisplay.h b/src/Native/Runtime/regdisplay.h
index 098286b2e0c..d68b84ad3ef 100644
--- a/src/Native/Runtime/regdisplay.h
+++ b/src/Native/Runtime/regdisplay.h
@@ -49,6 +49,36 @@ struct REGDISPLAY
 
 #elif defined(_TARGET_ARM_)
 
+typedef struct _ArmVolatileContextPointer
+{
+    PTR_UIntNative R0;
+    PTR_UIntNative R1;
+    PTR_UIntNative R2;
+    PTR_UIntNative R3;
+    PTR_UIntNative R12;
+} ArmVolatileContextPointer;
+
+typedef struct _ArmNonVolatileContextPointer {
+    PTR_UIntNative R4;
+    PTR_UIntNative R5;
+    PTR_UIntNative R6;
+    PTR_UIntNative R7;
+    PTR_UIntNative R8;
+    PTR_UIntNative R9;
+    PTR_UIntNative R10;
+    PTR_UIntNative R11;
+    PTR_UIntNative Lr;
+
+    PTR_UInt64 D8;
+    PTR_UInt64 D9;
+    PTR_UInt64 D10;
+    PTR_UInt64 D11;
+    PTR_UInt64 D12;
+    PTR_UInt64 D13;
+    PTR_UInt64 D14;
+    PTR_UInt64 D15;
+} ArmNonVolatileContextPointer;
+
 struct REGDISPLAY 
 {
     PTR_UIntNative pR0;
@@ -75,6 +105,9 @@ struct REGDISPLAY
                           // for EH, but not adjusted, so we only need
                           // their values, not their addresses
 
+    ArmNonVolatileContextPointer *pCurrentContextPointers;
+    ArmVolatileContextPointer     volatileCurrContextPointers;
+
     inline PCODE GetIP() { return IP; }
     inline PTR_PCODE GetAddrOfIP() { return pIP; }
     inline UIntNative GetSP() { return SP; }
diff --git a/src/Native/Runtime/unix/UnixContext.cpp b/src/Native/Runtime/unix/UnixContext.cpp
index 02caacf8fde..38933096682 100644
--- a/src/Native/Runtime/unix/UnixContext.cpp
+++ b/src/Native/Runtime/unix/UnixContext.cpp
@@ -207,12 +207,12 @@ static void RegDisplayToUnwindContext(REGDISPLAY* regDisplay, unw_context_t *unw
     // initialized by unw_init_local(), which are not updated by
     // unw_set_reg().
 
-#define ASSIGN_REG(regIndex, regName) \
-    unwContext->regs[regIndex] = regDisplay->regName2;
+#define ASSIGN_REG(regIndex, regName)                           \
+    unwContext->data[regIndex] = (uint64_t)(regDisplay->regName);
 
 #define ASSIGN_REG_PTR(regIndex, regName) \
-    if (regDisplay->p##regName2 != NULL) \
-        unwContext->regs[regIndex] = *(regDisplay->p##regName2);
+    if (regDisplay->p##regName != NULL) \
+        unwContext->data[regIndex] = (uint64_t)*(regDisplay->p##regName);
 
     ASSIGN_REG_PTR(4, R4);
     ASSIGN_REG_PTR(5, R5);
diff --git a/src/Native/libunwind/include/__libunwind_config.h b/src/Native/libunwind/include/__libunwind_config.h
index 17a1a192db9..93a3be1eb96 100644
--- a/src/Native/libunwind/include/__libunwind_config.h
+++ b/src/Native/libunwind/include/__libunwind_config.h
@@ -44,8 +44,8 @@
 #    define _LIBUNWIND_CONTEXT_SIZE 76
 #    define _LIBUNWIND_CURSOR_SIZE 83
 #  else
-#    define _LIBUNWIND_CONTEXT_SIZE 58
-#    define _LIBUNWIND_CURSOR_SIZE 65
+#    define _LIBUNWIND_CONTEXT_SIZE 50
+#    define _LIBUNWIND_CURSOR_SIZE 57
 #  endif
 #  define _LIBUNWIND_HIGHEST_DWARF_REGISTER 96
 # elif defined(__or1k__)