make/disassembly: generate disassembly file

Create the nuttx.asm in the disassembly format using the objdump program.

NOTE:
'>', objdump doesn't take arguments for output file,
but result is printed to standard out, and is redirected.

Signed-off-by: fanjiangang <fanjiangang@lixiang.com>
Signed-off-by: chao an <anchao@lixiang.com>

cmake/nuttx_generate_outputs.cmake

@@ -45,4 +45,13 @@ function(nuttx_generate_outputs target)
     add_custom_target(${target}-bin ALL DEPENDS ${target}.bin)
     file(APPEND ${CMAKE_BINARY_DIR}/nuttx.manifest "${target}.bin\n")
   endif()
+
+  if(CONFIG_RAW_DISASSEMBLY)
+    add_custom_command(
+      OUTPUT ${target}.asm
+      COMMAND ${CMAKE_OBJDUMP} -d ${target} > ${target}.asm
+      DEPENDS ${target})
+    add_custom_target(${target}-asm ALL DEPENDS ${target}.asm)
+    file(APPEND ${CMAKE_BINARY_DIR}/nuttx.manifest "${target}.asm\n")
+  endif()
 endfunction(nuttx_generate_outputs)