diff --git a/CMakeLists.txt b/CMakeLists.txt
index 77ef62c19..f2f3b78aa 100755
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -32,7 +32,9 @@ set(compile_time "${DATE}\" \"${TIME}" CACHE STRING " " FORCE)
 
 add_subdirectory(mkrtos_bootstrap)
 add_subdirectory(mkrtos_knl)
-# add_subdirectory(mkrtos_img)
+if ((NOT DEFINED CONFIG_MMU) OR (CONFIG_MMU STREQUAL "n"))
+    add_subdirectory(mkrtos_img)
+endif()
 add_subdirectory(mkrtos_user)
 
 
diff --git a/mkrtos_bootstrap/CMakeLists.txt b/mkrtos_bootstrap/CMakeLists.txt
index 786f12eff..eff672d62 100755
--- a/mkrtos_bootstrap/CMakeLists.txt
+++ b/mkrtos_bootstrap/CMakeLists.txt
@@ -34,7 +34,7 @@ if (${CONFIG_CPU_TYPE} STREQUAL "stm32f1")
         ${CMAKE_SOURCE_DIR}/mkrtos_bsp/STM32/STM32F10x_StdPeriph_Lib_V3.5.0/Libraries/CMSIS/CM3/CoreSupport
     )
     add_subdirectory(bsp/STM32F1)
-    set(PACK_CMD "${CMAKE_OBJCOPY} -I binary -O elf32-littlearm -B arm rootfs.cpio rootfs.cpio.elf --rename-section .data=.cpio")
+    set(LINKS_FLAGS " --gc-section ")
 elseif(${CONFIG_CPU_TYPE} STREQUAL "stm32f2" )
 
     file(GLOB bsp_src ${CMAKE_SOURCE_DIR}/mkrtos_bsp/STM32/STM32F2xx_StdPeriph_Lib_V1.1.0/Libraries/STM32F2xx_StdPeriph_Driver/src/*.c)
@@ -47,7 +47,8 @@ elseif(${CONFIG_CPU_TYPE} STREQUAL "stm32f2" )
         ${CMAKE_SOURCE_DIR}/mkrtos_bsp/STM32/STM32F2xx_StdPeriph_Lib_V1.1.0/Libraries/CMSIS/Device/ST/STM32F2xx/Include
     )
     add_subdirectory(bsp/STM32F2)
-    set(PACK_CMD "${CMAKE_OBJCOPY} -I binary -O elf32-littlearm -B arm rootfs.cpio rootfs.cpio.elf --rename-section .data=.cpio")
+    set(LINKS_FLAGS " --gc-section ")
+
 elseif(${CONFIG_CPU_TYPE} STREQUAL "stm32f4" )
     if(${CONFIG_BOARD_NAME} STREQUAL "STM32F407VET6" )
         set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -DSTM32F40_41xxx ")
@@ -65,14 +66,16 @@ elseif(${CONFIG_CPU_TYPE} STREQUAL "stm32f4" )
         ${CMAKE_SOURCE_DIR}/mkrtos_bsp/STM32/STM32F4xx_DSP_StdPeriph_Lib_V1.9.0/Libraries/CMSIS/Device/ST/STM32F4xx/Include
     )
     add_subdirectory(bsp/STM32F4)
-    set(PACK_CMD "${CMAKE_OBJCOPY} -I binary -O elf32-littlearm -B arm rootfs.cpio rootfs.cpio.elf --rename-section .data=.cpio")
+    set(LINKS_FLAGS " --gc-section ")
+
 elseif(${CONFIG_CPU_TYPE} STREQUAL "Cortex-R52" )
     include_directories(
         ${CMAKE_SOURCE_DIR}/mkrtos_bootstrap/bsp/Cortex-R52
 
     )
     add_subdirectory(bsp/Cortex-R52)
-    set(PACK_CMD "${CMAKE_OBJCOPY} -I binary -O elf32-littlearm -B arm rootfs.cpio rootfs.cpio.elf --rename-section .data=.cpio")
+    set(LINKS_FLAGS " --gc-section ")
+
 elseif(${CONFIG_CPU_TYPE} STREQUAL "swm34s" )
 
     file(GLOB bsp_src 
@@ -89,49 +92,55 @@ elseif(${CONFIG_CPU_TYPE} STREQUAL "swm34s" )
         ${CMAKE_SOURCE_DIR}/mkrtos_bsp/SWM34/SWM341_StdPeriph_Driver/SWM341_StdPeriph_Driver
     )
     add_subdirectory(bsp/SWM34S)
-    set(PACK_CMD "${CMAKE_OBJCOPY} -I binary -O elf32-littlearm -B arm rootfs.cpio rootfs.cpio.elf --rename-section .data=.cpio")
+    set(LINKS_FLAGS " --gc-section ")
+
 elseif(${CONFIG_CPU_TYPE} STREQUAL "aarch64_qemu" )
     include_directories(
         ${CMAKE_SOURCE_DIR}/mkrtos_bootstrap/bsp/AARCH64_QEMU
     )
     add_subdirectory(bsp/AARCH64_QEMU)
-    set(PACK_CMD "${CMAKE_OBJCOPY} -I binary -O elf64-littleaarch64 -B aarch64 rootfs.cpio rootfs.cpio.elf --rename-section .data=.cpio")
+    set(LINKS_FLAGS " ")
+
 endif()
 
-add_custom_target(
-    gen_sys_cpio
+if ((DEFINED CONFIG_MMU) AND (CONFIG_MMU STREQUAL "y"))
+    add_custom_target(
+        gen_sys_cpio
 
-    COMMAND
-    cd ${CMAKE_SOURCE_DIR}/build/output/cpio
-    COMMAND
-    ls | cpio -H newc -o > ${CMAKE_SOURCE_DIR}/build/output/rootfs.cpio
-    COMMAND
-    cd ${CMAKE_SOURCE_DIR}/build/output
-    COMMAND
-    eval ${PACK_CMD}
-    WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}/build/output
-    BYPRODUCTS ${CMAKE_SOURCE_DIR}/build/output/rootfs.cpio.elf
+        COMMAND
+        cd ${CMAKE_SOURCE_DIR}/build/output/cpio
+        COMMAND
+        ls | cpio -H newc -o > ${CMAKE_SOURCE_DIR}/build/output/rootfs.cpio
+        COMMAND
+        cd ${CMAKE_SOURCE_DIR}/build/output
+        COMMAND
+        ${CMAKE_OBJCOPY} -I binary -O elf64-littleaarch64 -B aarch64 rootfs.cpio rootfs.cpio.elf --rename-section .data=.cpio
+        WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}/build/output
+        BYPRODUCTS ${CMAKE_SOURCE_DIR}/build/output/rootfs.cpio.elf
+        )
+    add_dependencies(
+        gen_sys_cpio
+        mkrtos_dump
     )
-    # ${CMAKE_OBJCOPY} -I binary -O elf64-littleaarch64 -B aarch64 rootfs.cpio rootfs.cpio.elf --rename-section .data=.cpio
-add_dependencies(
-    gen_sys_cpio
-    mkrtos_dump
-)
-
-set_source_files_properties(${CMAKE_SOURCE_DIR}/build/output/rootfs.cpio.elf PROPERTIES EXTERNAL_OBJECT true)
-
-add_executable(bootstrap.elf
+    set_source_files_properties(${CMAKE_SOURCE_DIR}/build/output/rootfs.cpio.elf PROPERTIES EXTERNAL_OBJECT true)
+    add_executable(bootstrap.elf
+        ${deps}
+        ${CMAKE_SOURCE_DIR}/build/output/rootfs.cpio.elf
+    )
+    add_dependencies(bootstrap.elf gen_sys_cpio)
+else()
+    add_executable(bootstrap.elf
     ${deps}
-    ${CMAKE_SOURCE_DIR}/build/output/rootfs.cpio.elf
-)
+    )
+endif()
+
 # message("CONFIG_CPU_TYPE="${CONFIG_CPU_TYPE})
 string(TOUPPER ${CONFIG_CPU_TYPE} cpu_type)
 set_target_properties(bootstrap.elf PROPERTIES LINK_FLAGS 
-"-T ${CMAKE_CURRENT_LIST_DIR}/bsp/${cpu_type}/link.lds")
+"-T ${CMAKE_CURRENT_LIST_DIR}/bsp/${cpu_type}/link.lds ${LINKS_FLAGS} ")
 
 target_link_libraries(
     bootstrap.elf
-    # mk_bsp
     --whole-archive
     boot_bsp
     --no-whole-archive
@@ -154,5 +163,4 @@ add_custom_target(
     ${CMAKE_SIZE} bootstrap.elf
 )
 add_dependencies(bootstrap_dump bootstrap.elf)
-add_dependencies(bootstrap.elf boot_bsp)
-add_dependencies(bootstrap.elf gen_sys_cpio)
\ No newline at end of file
+add_dependencies(bootstrap.elf boot_bsp)
\ No newline at end of file
diff --git a/mkrtos_bootstrap/bsp/STM32F2/link.lds b/mkrtos_bootstrap/bsp/STM32F2/link.lds
index b991560c6..446c13e01 100755
--- a/mkrtos_bootstrap/bsp/STM32F2/link.lds
+++ b/mkrtos_bootstrap/bsp/STM32F2/link.lds
@@ -49,7 +49,11 @@ SECTIONS
     KEEP (*(SORT(.mkrtos.init.*)))
     _mkrtos_init_end = .;
 	
-
+    . = ALIGN(4);
+    cpio_start = .;
+    *(.cpio*)
+    . = ALIGN(4096);
+    cpio_end = .;
     . = ALIGN(4);
     _etext = .;        /* define a global symbols at end of code */
 
diff --git a/mkrtos_bootstrap/bsp/STM32F4/link.lds b/mkrtos_bootstrap/bsp/STM32F4/link.lds
index b991560c6..26bc5407c 100755
--- a/mkrtos_bootstrap/bsp/STM32F4/link.lds
+++ b/mkrtos_bootstrap/bsp/STM32F4/link.lds
@@ -48,7 +48,12 @@ SECTIONS
     _mkrtos_init_start = .;
     KEEP (*(SORT(.mkrtos.init.*)))
     _mkrtos_init_end = .;
-	
+    
+    . = ALIGN(4);
+    cpio_start = .;
+    *(.cpio*)
+    . = ALIGN(4096);
+    cpio_end = .;
 
     . = ALIGN(4);
     _etext = .;        /* define a global symbols at end of code */
diff --git a/mkrtos_knl/CMakeLists.txt b/mkrtos_knl/CMakeLists.txt
index a71bcc9c7..4a43cd5ba 100755
--- a/mkrtos_knl/CMakeLists.txt
+++ b/mkrtos_knl/CMakeLists.txt
@@ -71,12 +71,18 @@ add_custom_target(
     COMMAND
     cp mkrtos.elf ${CMAKE_SOURCE_DIR}/build/output/mkrtos.elf
     COMMAND
-    cp mkrtos.elf ${CMAKE_SOURCE_DIR}/build/output/cpio/mkrtos.elf
-    COMMAND
     ${CMAKE_OBJDUMP} -s -S mkrtos.elf > ${CMAKE_SOURCE_DIR}/build/output/mkrtos.S
     COMMAND
     ${CMAKE_SIZE} mkrtos.elf
 )
+if ((DEFINED CONFIG_ELF_LAUNCH) AND (CONFIG_ELF_LAUNCH STREQUAL "y"))
+    add_custom_target(
+        mkrtos_dump_elf ALL
+        COMMAND
+        cp init.elf ${CMAKE_SOURCE_DIR}/build/output/cpio/mkrtos.elf
+    )
+    add_dependencies(mkrtos_dump_elf mkrtos_dump)
+endif()
 add_dependencies(mkrtos.elf link_file_dump)
 add_dependencies(mkrtos_dump mkrtos.elf)
 add_dependencies(mkrtos_dump knl)
diff --git a/mkrtos_script/debug_m3.sh b/mkrtos_script/debug_m3.sh
index 1fcf5344e..f0087f26f 100755
--- a/mkrtos_script/debug_m3.sh
+++ b/mkrtos_script/debug_m3.sh
@@ -1,6 +1,6 @@
 #!/bin/bash
 
-if [ -z "$1"]; then
+if [ -z "$1" ]; then
 	echo "usage: ./debug.sh [tcp port]"
 	exit
 fi
diff --git a/mkrtos_user/CMakeLists.txt b/mkrtos_user/CMakeLists.txt
index a3353edc2..e96451ce6 100644
--- a/mkrtos_user/CMakeLists.txt
+++ b/mkrtos_user/CMakeLists.txt
@@ -14,7 +14,7 @@ if (${CONFIG_ARCH} STREQUAL "cortex-m3" OR
     " )
 
     set(CORTEX_M_LINK_FLAGS "-pie")
-    set(LIBC_NAME "mulsc")
+    set(LIBC_NAME "muslc")
     set(ARCH_NAME "armv7_8m")
 
     include_directories(
diff --git a/mkrtos_user/lib/sys_util/CMakeLists.txt b/mkrtos_user/lib/sys_util/CMakeLists.txt
index ee15d8ccc..125f2947e 100644
--- a/mkrtos_user/lib/sys_util/CMakeLists.txt
+++ b/mkrtos_user/lib/sys_util/CMakeLists.txt
@@ -2,11 +2,11 @@ cmake_minimum_required(VERSION 3.13)
 
 
 file(GLOB_RECURSE deps  *.c *.S)
-if (DEFINED CONFIG_ELF_LAUNCH)
-    if (CONFIG_ELF_LAUNCH STREQUAL "y")
-        list(REMOVE_ITEM deps ${CMAKE_SOURCE_DIR}/mkrtos_user/lib/sys_util/src/u_app_loader.c)
-        list(APPEND deps ${CMAKE_SOURCE_DIR}/mkrtos_user/lib/sys_util/src/u_elf_loader.c)
-    endif()
+if ((DEFINED CONFIG_ELF_LAUNCH) AND (CONFIG_ELF_LAUNCH STREQUAL "y"))
+    list(REMOVE_ITEM deps ${CMAKE_SOURCE_DIR}/mkrtos_user/lib/sys_util/src/u_app_loader.c)
+else()
+    list(REMOVE_ITEM deps ${CMAKE_SOURCE_DIR}/mkrtos_user/lib/sys_util/src/u_elf_loader.c)
+    list(REMOVE_ITEM deps ${CMAKE_SOURCE_DIR}/mkrtos_user/lib/sys_util/src/u_elf64.c)
 endif()
 
 add_library(
diff --git a/mkrtos_user/server/fs/cpiofs/CMakeLists.txt b/mkrtos_user/server/fs/cpiofs/CMakeLists.txt
index e2ac89751..9bc437226 100644
--- a/mkrtos_user/server/fs/cpiofs/CMakeLists.txt
+++ b/mkrtos_user/server/fs/cpiofs/CMakeLists.txt
@@ -59,9 +59,14 @@ add_custom_target(
     mkdir -p ${CMAKE_SOURCE_DIR}/build/output/cpio
     COMMAND
     cp cpiofs.bin ${CMAKE_SOURCE_DIR}/build/output/cpio/cpiofs
-    COMMAND
-    cp cpiofs.elf ${CMAKE_SOURCE_DIR}/build/output/cpio/cpiofs.elf
 )
-
+if ((DEFINED CONFIG_ELF_LAUNCH) AND (CONFIG_ELF_LAUNCH STREQUAL "y"))
+    add_custom_target(
+        cpiofs_dump_elf ALL
+        COMMAND
+        cp cpiofs.elf ${CMAKE_SOURCE_DIR}/build/output/cpio/cpiofs.elf
+    )
+    add_dependencies(cpiofs_dump_elf cpiofs_dump)
+endif()
 add_dependencies(cpiofs_dump cpiofs.elf)
  
\ No newline at end of file
diff --git a/mkrtos_user/server/init/CMakeLists.txt b/mkrtos_user/server/init/CMakeLists.txt
index 7c347f34a..047a2e925 100644
--- a/mkrtos_user/server/init/CMakeLists.txt
+++ b/mkrtos_user/server/init/CMakeLists.txt
@@ -42,21 +42,26 @@ add_custom_target(
     ${CMAKE_OBJDUMP} -s -S init.elf > ${CMAKE_SOURCE_DIR}/build/output/init.S
     # COMMAND
     # ${CMAKE_READELF} -a init.elf > ${CMAKE_SOURCE_DIR}/build/output/init.txt
-    # COMMAND
-    # ${CMAKE_OBJCOPY} -O binary -S init.elf init.bin
+    COMMAND
+    ${CMAKE_OBJCOPY} -O binary -S init.elf init.bin
     COMMAND
     ${CMAKE_SIZE} init.elf
     COMMAND
     mkdir -p ${CMAKE_SOURCE_DIR}/build/output
-    # COMMAND
-    # cp init.bin ${CMAKE_SOURCE_DIR}/build/output/init
-    # COMMAND
-    # cp init.elf ${CMAKE_SOURCE_DIR}/build/output/init.elf
     COMMAND
-    cp init.elf ${CMAKE_SOURCE_DIR}/build/output/cpio/init.elf
+    cp init.bin ${CMAKE_SOURCE_DIR}/build/output/init
     COMMAND
     cp ${CMAKE_CURRENT_LIST_DIR}/src/init.cfg ${CMAKE_SOURCE_DIR}/build/output/cpio/
+    COMMAND
+    cp init.elf ${CMAKE_SOURCE_DIR}/build/output/init.elf
 )
-
+if ((DEFINED CONFIG_ELF_LAUNCH) AND (CONFIG_ELF_LAUNCH STREQUAL "y"))
+    add_custom_target(
+        init_dump_elf ALL
+        COMMAND
+        cp init.elf ${CMAKE_SOURCE_DIR}/build/output/cpio/init.elf
+    )
+    add_dependencies(init_dump_elf init_dump)
+endif()
 add_dependencies(init_dump init.elf)
 add_dependencies(init.elf libc_be util)
diff --git a/mkrtos_user/server/shell/CMakeLists.txt b/mkrtos_user/server/shell/CMakeLists.txt
index 37cd962f3..e0573a33d 100644
--- a/mkrtos_user/server/shell/CMakeLists.txt
+++ b/mkrtos_user/server/shell/CMakeLists.txt
@@ -47,9 +47,16 @@ add_custom_target(
     COMMAND
     mkdir -p ${CMAKE_SOURCE_DIR}/build/output/cpio
     COMMAND
-    cp sh.elf ${CMAKE_SOURCE_DIR}/build/output/cpio/sh.elf
+    cp sh.bin ${CMAKE_SOURCE_DIR}/build/output/cpio/sh
 )
-
+if ((DEFINED CONFIG_ELF_LAUNCH) AND (CONFIG_ELF_LAUNCH STREQUAL "y"))
+    add_custom_target(
+        sh_dump_elf ALL
+        COMMAND
+        cp sh.elf ${CMAKE_SOURCE_DIR}/build/output/cpio/sh.elf
+    )
+    add_dependencies(sh_dump_elf shell_dump)
+endif()
 add_dependencies(shell_dump sh.elf)
 add_dependencies(shell_dump sys)
 add_dependencies(shell_dump sys_util)
diff --git a/mkrtos_user/server/tinycc-arm-thumb/CMakeLists.txt b/mkrtos_user/server/tinycc-arm-thumb/CMakeLists.txt
index c8840dc51..60d4e0385 100644
--- a/mkrtos_user/server/tinycc-arm-thumb/CMakeLists.txt
+++ b/mkrtos_user/server/tinycc-arm-thumb/CMakeLists.txt
@@ -78,10 +78,16 @@ add_custom_target(
     mkdir -p ${CMAKE_SOURCE_DIR}/build/output/cpio
     # COMMAND
     # cp tcc.bin ${CMAKE_SOURCE_DIR}/build/output/cpio/tcc
-    COMMAND
-    cp tcc.elf ${CMAKE_SOURCE_DIR}/build/output/cpio/tcc.elf
-)
 
+)
+if ((DEFINED CONFIG_ELF_LAUNCH) AND (CONFIG_ELF_LAUNCH STREQUAL "y"))
+    add_custom_target(
+        tcc_dump_elf ALL
+        COMMAND
+        cp tcc.elf ${CMAKE_SOURCE_DIR}/build/output/cpio/tcc.elf
+    )
+    add_dependencies(tcc_dump_elf tcc_dump)
+endif()
 add_dependencies(tcc_dump tcc.elf)
 add_dependencies(tcc_dump sys)
 add_dependencies(tcc_dump sys_util)