#
# Copyright (C) 2006-2010 OpenWrt.org
#
# This is free software, licensed under the GNU General Public License v2.
# See /LICENSE for more information.
#

HOST_BUILD_DIR ?= $(BUILD_DIR_HOST)/$(PKG_NAME)$(if $(PKG_VERSION),-$(PKG_VERSION))
HOST_INSTALL_DIR ?= $(HOST_BUILD_DIR)/host-install
HOST_BUILD_PARALLEL ?=

ifneq ($(CONFIG_PKG_BUILD_USE_JOBSERVER),)
  HOST_MAKE_J:=$(if $(MAKE_JOBSERVER),$(MAKE_JOBSERVER) -j)
else
  HOST_MAKE_J:=-j$(CONFIG_PKG_BUILD_JOBS)
endif

ifeq ($(strip $(HOST_BUILD_PARALLEL)),0)
HOST_JOBS?=-j1
else
HOST_JOBS?=$(if $(HOST_BUILD_PARALLEL)$(CONFIG_PKG_DEFAULT_PARALLEL),\
	$(if $(CONFIG_PKG_BUILD_PARALLEL),$(HOST_MAKE_J),-j1),-j1)
endif

include $(INCLUDE_DIR)/host.mk
include $(INCLUDE_DIR)/unpack.mk
include $(INCLUDE_DIR)/depends.mk

BUILD_TYPES += host
HOST_STAMP_PREPARED=$(HOST_BUILD_DIR)/.prepared$(if $(HOST_QUILT)$(DUMP),,$(shell $(call find_md5,${CURDIR} $(PKG_FILE_DEPENDS),)))
HOST_STAMP_CONFIGURED:=$(HOST_BUILD_DIR)/.configured
HOST_STAMP_BUILT:=$(HOST_BUILD_DIR)/.built
HOST_STAMP_INSTALLED:=$(STAGING_DIR_HOST)/stamp/.$(PKG_NAME)_installed

override MAKEFLAGS=

include $(INCLUDE_DIR)/download.mk
include $(INCLUDE_DIR)/quilt.mk
include $(INCLUDE_DIR)/autotools.mk

Host/Patch:=$(Host/Patch/Default)
ifneq ($(strip $(HOST_UNPACK)),)
  define Host/Prepare/Default
	$(HOST_UNPACK)
	$(Host/Patch)
  endef
endif

define Host/Prepare
  $(call Host/Prepare/Default)
endef

HOST_CONFIGURE_VARS = \
	CC="$(HOSTCC)" \
	CFLAGS="$(HOST_CFLAGS)" \
	CPPFLAGS="$(HOST_CPPFLAGS)" \
	LDFLAGS="$(HOST_LDFLAGS)" \
	SHELL="$(BASH)"

HOST_CONFIGURE_ARGS = \
	--target=$(GNU_HOST_NAME) \
	--host=$(GNU_HOST_NAME) \
	--build=$(GNU_HOST_NAME) \
	--program-prefix="" \
	--program-suffix="" \
	--prefix=$(STAGING_DIR_HOST) \
	--exec-prefix=$(STAGING_DIR_HOST) \
	--sysconfdir=$(STAGING_DIR_HOST)/etc \
	--localstatedir=$(STAGING_DIR_HOST)/var \
	--sbindir=$(STAGING_DIR_HOST)/bin

HOST_MAKE_FLAGS =

HOST_CONFIGURE_CMD = $(BASH) ./configure

ifneq ($(HOST_OS),Darwin)
  ifeq ($(CONFIG_BUILD_STATIC_TOOLS),y)
    HOST_STATIC_LINKING = -static
  endif
endif

define Host/Configure/Default
	$(if $(HOST_CONFIGURE_PARALLEL),+)(cd $(HOST_BUILD_DIR)/$(3); \
		if [ -x configure ]; then \
			$(CP) $(SCRIPT_DIR)/config.{guess,sub} $(HOST_BUILD_DIR)/$(3)/ && \
			$(2) \
			$(HOST_CONFIGURE_CMD) \
			$(HOST_CONFIGURE_VARS) \
			$(HOST_CONFIGURE_ARGS) \
			$(1); \
		fi \
	)
endef

define Host/Configure
  $(call Host/Configure/Default)
endef

define Host/Compile/Default
	+$(MAKE) $(HOST_JOBS) -C $(HOST_BUILD_DIR) \
		$(HOST_MAKE_FLAGS) \
		$(1)
endef

define Host/Compile
  $(call Host/Compile/Default)
endef

define Host/Install/Default
	$(_SINGLE)$(MAKE) -C $(HOST_BUILD_DIR) install
endef

define Host/Install
  $(call Host/Install/Default)
endef


ifneq ($(if $(HOST_QUILT),,$(CONFIG_AUTOREBUILD)),)
  define HostHost/Autoclean
    $(call rdep,${CURDIR} $(PKG_FILE_DEPENDS),$(HOST_STAMP_PREPARED))
    $(if $(if $(Host/Compile),$(filter prepare,$(MAKECMDGOALS)),1),,$(call rdep,$(HOST_BUILD_DIR),$(HOST_STAMP_BUILT)))
  endef
endif

define Download/default
  FILE:=$(PKG_SOURCE)
  URL:=$(PKG_SOURCE_URL)
  PROTO:=$(PKG_SOURCE_PROTO)
  SUBDIR:=$(PKG_SOURCE_SUBDIR)
  VERSION:=$(PKG_SOURCE_VERSION)
  MD5SUM:=$(PKG_MD5SUM)
  MIRROR_MD5SUM:=$(PKG_MIRROR_MD5SUM)
endef

define Host/Exports/Default
  $(1) : export ACLOCAL_INCLUDE=$$(foreach p,$$(wildcard $$(STAGING_DIR_HOST)/share/aclocal $$(STAGING_DIR_HOST)/share/aclocal-*),-I $$(p))
  $(1) : export STAGING_PREFIX=$$(STAGING_DIR_HOST)
  $(1) : export PKG_CONFIG_PATH=$$(STAGING_DIR_HOST)/lib/pkgconfig
  $(1) : export PKG_CONFIG_LIBDIR=$$(STAGING_DIR_HOST)/lib/pkgconfig
endef
Host/Exports=$(Host/Exports/Default)

.NOTPARALLEL:

ifndef DUMP
  define HostBuild
  $(if $(HOST_QUILT),$(Host/Quilt))
  $(if $(if $(PKG_HOST_ONLY),,$(STAMP_PREPARED)),,$(if $(strip $(PKG_SOURCE_URL)),$(call Download,default)))
  $(if $(DUMP),,$(call HostHost/Autoclean))

  $(HOST_STAMP_PREPARED):
	@-rm -rf $(HOST_BUILD_DIR)
	@mkdir -p $(HOST_BUILD_DIR)
	$(foreach hook,$(Hooks/HostPrepare/Pre),$(call $(hook))$(sep))
	$(call Host/Prepare)
	$(foreach hook,$(Hooks/HostPrepare/Post),$(call $(hook))$(sep))
	touch $$@

  $(call Host/Exports,$(HOST_STAMP_CONFIGURED))
  $(HOST_STAMP_CONFIGURED): $(HOST_STAMP_PREPARED)
	$(foreach hook,$(Hooks/HostConfigure/Pre),$(call $(hook))$(sep))
	$(call Host/Configure)
	$(foreach hook,$(Hooks/HostConfigure/Post),$(call $(hook))$(sep))
	touch $$@

  $(call Host/Exports,$(HOST_STAMP_BUILT))
  $(HOST_STAMP_BUILT): $(HOST_STAMP_CONFIGURED)
		$(foreach hook,$(Hooks/HostCompile/Pre),$(call $(hook))$(sep))
		$(call Host/Compile)
		$(foreach hook,$(Hooks/HostCompile/Post),$(call $(hook))$(sep))
		touch $$@

  $(HOST_STAMP_INSTALLED): $(HOST_STAMP_BUILT) $(if $(FORCE_HOST_INSTALL),FORCE)
		$(call Host/Install)
		$(foreach hook,$(Hooks/HostInstall/Post),$(call $(hook))$(sep))
		mkdir -p $$(shell dirname $$@)
		touch $$@

  ifndef STAMP_BUILT
    prepare: host-prepare
    compile: host-compile
    install: host-install
    clean: host-clean
    update: host-update
    refresh: host-refresh
  endif

  host-prepare: $(HOST_STAMP_PREPARED)
  host-configure: $(HOST_STAMP_CONFIGURED)
  host-compile: $(HOST_STAMP_BUILT) $(if $(STAMP_BUILT),$(HOST_STAMP_INSTALLED))
  host-install: $(HOST_STAMP_INSTALLED)
  host-clean: FORCE
	$(call Host/Clean)
	$(call Host/Uninstall)
	rm -rf $(HOST_BUILD_DIR) $(HOST_STAMP_INSTALLED) $(HOST_STAMP_BUILT)

  endef

  download:
  prepare:
  compile:
  install:
  clean:

endif
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<a id='n351' href='#n351'>351</a>
<a id='n352' href='#n352'>352</a>
<a id='n353' href='#n353'>353</a>
<a id='n354' href='#n354'>354</a>
<a id='n355' href='#n355'>355</a>
<a id='n356' href='#n356'>356</a>
<a id='n357' href='#n357'>357</a>
<a id='n358' href='#n358'>358</a>
<a id='n359' href='#n359'>359</a>
<a id='n360' href='#n360'>360</a>
<a id='n361' href='#n361'>361</a>
<a id='n362' href='#n362'>362</a>
<a id='n363' href='#n363'>363</a>
<a id='n364' href='#n364'>364</a>
<a id='n365' href='#n365'>365</a>
<a id='n366' href='#n366'>366</a>
<a id='n367' href='#n367'>367</a>
<a id='n368' href='#n368'>368</a>
<a id='n369' href='#n369'>369</a>
<a id='n370' href='#n370'>370</a>
<a id='n371' href='#n371'>371</a>
<a id='n372' href='#n372'>372</a>
<a id='n373' href='#n373'>373</a>
<a id='n374' href='#n374'>374</a>
<a id='n375' href='#n375'>375</a>
<a id='n376' href='#n376'>376</a>
<a id='n377' href='#n377'>377</a>
</pre></td>
<td class='lines'><pre><code><style>pre { line-height: 125%; margin: 0; }
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.highlight .il { color: #0000DD; font-weight: bold } /* Literal.Number.Integer.Long */</style><div class="highlight"><pre><span></span><span class="cp">#include</span> <span class="cpf">&lt;stdlib.h&gt;</span><span class="cp"></span>
<span class="cp">#include</span> <span class="cpf">&lt;stdio.h&gt;</span><span class="cp"></span>
<span class="cp">#include</span> <span class="cpf">&lt;string.h&gt;</span><span class="cp"></span>


<span class="cp">#define IMG_SIZE     0x3e0000</span>

<span class="cp">#define KERNEL_START 0x020000</span>
<span class="cp">#define KERNEL_SIZE  0x0b0000</span>

<span class="cp">#define ROOTFS_START 0x0d0000</span>
<span class="cp">#define ROOTFS_SIZE  0x30ffb2</span>

<span class="kt">char</span><span class="o">*</span> <span class="n">app_name</span><span class="p">;</span>




<span class="kt">void</span> <span class="nf">print_usage</span><span class="p">(</span><span class="kt">void</span><span class="p">)</span>
<span class="p">{</span>
  <span class="n">fprintf</span><span class="p">(</span><span class="n">stderr</span><span class="p">,</span> <span class="s">&quot;usage: dgfirmware [&lt;opts&gt;] &lt;img&gt;</span><span class="se">\n</span><span class="s">&quot;</span><span class="p">);</span>
  <span class="n">fprintf</span><span class="p">(</span><span class="n">stderr</span><span class="p">,</span> <span class="s">&quot;  &lt;img&gt;               firmware image filename</span><span class="se">\n</span><span class="s">&quot;</span><span class="p">);</span>
  <span class="n">fprintf</span><span class="p">(</span><span class="n">stderr</span><span class="p">,</span> <span class="s">&quot;  &lt;opts&gt;  -h          print this message</span><span class="se">\n</span><span class="s">&quot;</span><span class="p">);</span>
  <span class="n">fprintf</span><span class="p">(</span><span class="n">stderr</span><span class="p">,</span> <span class="s">&quot;          -f          fix the checksum</span><span class="se">\n</span><span class="s">&quot;</span><span class="p">);</span>
  <span class="n">fprintf</span><span class="p">(</span><span class="n">stderr</span><span class="p">,</span> <span class="s">&quot;          -x  &lt;file&gt;  extract the rootfs file to &lt;file&gt;</span><span class="se">\n</span><span class="s">&quot;</span><span class="p">);</span>
  <span class="n">fprintf</span><span class="p">(</span><span class="n">stderr</span><span class="p">,</span> <span class="s">&quot;          -xk &lt;file&gt;  extract the kernel to &lt;file&gt;</span><span class="se">\n</span><span class="s">&quot;</span><span class="p">);</span>
  <span class="n">fprintf</span><span class="p">(</span><span class="n">stderr</span><span class="p">,</span> <span class="s">&quot;          -m  &lt;file&gt;  merge in rootfs fil\e from &lt;file&gt;</span><span class="se">\n</span><span class="s">&quot;</span><span class="p">);</span>
  <span class="n">fprintf</span><span class="p">(</span><span class="n">stderr</span><span class="p">,</span> <span class="s">&quot;          -k  &lt;file&gt;  merge in kernel from &lt;file&gt;</span><span class="se">\n</span><span class="s">&quot;</span><span class="p">);</span>
  <span class="n">fprintf</span><span class="p">(</span><span class="n">stderr</span><span class="p">,</span> <span class="s">&quot;          -w  &lt;file&gt;  write back the modified firmware</span><span class="se">\n</span><span class="s">&quot;</span><span class="p">);</span>
<span class="p">}</span>


<span class="kt">unsigned</span> <span class="kt">char</span><span class="o">*</span> <span class="n">read_img</span><span class="p">(</span><span class="k">const</span> <span class="kt">char</span> <span class="o">*</span><span class="n">fname</span><span class="p">)</span>
<span class="p">{</span>
  <span class="kt">FILE</span> <span class="o">*</span><span class="n">fp</span><span class="p">;</span>
  <span class="kt">int</span> <span class="n">size</span><span class="p">;</span>
  <span class="kt">unsigned</span> <span class="kt">char</span> <span class="o">*</span><span class="n">img</span><span class="p">;</span>

  <span class="n">fp</span> <span class="o">=</span> <span class="n">fopen</span><span class="p">(</span><span class="n">fname</span><span class="p">,</span> <span class="s">&quot;rb&quot;</span><span class="p">);</span>
  <span class="k">if</span> <span class="p">(</span><span class="n">fp</span> <span class="o">==</span> <span class="nb">NULL</span><span class="p">)</span> <span class="p">{</span>
    <span class="n">perror</span><span class="p">(</span><span class="n">app_name</span><span class="p">);</span>
    <span class="n">exit</span><span class="p">(</span><span class="mi">-1</span><span class="p">);</span>
  <span class="p">}</span>

  <span class="n">fseek</span><span class="p">(</span><span class="n">fp</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="n">SEEK_END</span><span class="p">);</span>
  <span class="n">size</span> <span class="o">=</span> <span class="n">ftell</span><span class="p">(</span><span class="n">fp</span><span class="p">);</span>
  
  <span class="k">if</span> <span class="p">(</span><span class="n">size</span> <span class="o">!=</span> <span class="n">IMG_SIZE</span><span class="p">)</span> <span class="p">{</span>
    <span class="n">fprintf</span><span class="p">(</span><span class="n">stderr</span><span class="p">,</span> <span class="s">&quot;%s: image file has wrong size</span><span class="se">\n</span><span class="s">&quot;</span><span class="p">,</span> <span class="n">app_name</span><span class="p">);</span>
    <span class="n">fclose</span><span class="p">(</span><span class="n">fp</span><span class="p">);</span>
    <span class="n">exit</span><span class="p">(</span><span class="mi">-1</span><span class="p">);</span>
  <span class="p">}</span>

  <span class="n">rewind</span><span class="p">(</span><span class="n">fp</span><span class="p">);</span>

  <span class="n">img</span> <span class="o">=</span> <span class="n">malloc</span><span class="p">(</span><span class="n">IMG_SIZE</span><span class="p">);</span>
  <span class="k">if</span> <span class="p">(</span><span class="n">img</span> <span class="o">==</span> <span class="nb">NULL</span><span class="p">)</span> <span class="p">{</span>
    <span class="n">perror</span><span class="p">(</span><span class="n">app_name</span><span class="p">);</span>
    <span class="n">fclose</span><span class="p">(</span><span class="n">fp</span><span class="p">);</span>
    <span class="n">exit</span><span class="p">(</span><span class="mi">-1</span><span class="p">);</span>
  <span class="p">}</span>

  <span class="k">if</span> <span class="p">(</span><span class="n">fread</span><span class="p">(</span><span class="n">img</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="n">IMG_SIZE</span><span class="p">,</span> <span class="n">fp</span><span class="p">)</span> <span class="o">!=</span> <span class="n">IMG_SIZE</span><span class="p">)</span> <span class="p">{</span>
    <span class="n">fprintf</span><span class="p">(</span><span class="n">stderr</span><span class="p">,</span> <span class="s">&quot;%s: can&#39;t read image file</span><span class="se">\n</span><span class="s">&quot;</span><span class="p">,</span> <span class="n">app_name</span><span class="p">);</span>
    <span class="n">fclose</span><span class="p">(</span><span class="n">fp</span><span class="p">);</span>
    <span class="n">exit</span><span class="p">(</span><span class="mi">-1</span><span class="p">);</span>
  <span class="p">}</span>

  <span class="n">fclose</span><span class="p">(</span><span class="n">fp</span><span class="p">);</span>
  <span class="k">return</span> <span class="n">img</span><span class="p">;</span>
<span class="p">}</span>


<span class="kt">void</span> <span class="n">write_img</span><span class="p">(</span><span class="kt">unsigned</span> <span class="kt">char</span><span class="o">*</span> <span class="n">img</span><span class="p">,</span> <span class="k">const</span> <span class="kt">char</span> <span class="o">*</span><span class="n">fname</span><span class="p">)</span>
<span class="p">{</span>
  <span class="kt">FILE</span> <span class="o">*</span><span class="n">fp</span><span class="p">;</span>

  <span class="n">fp</span> <span class="o">=</span> <span class="n">fopen</span><span class="p">(</span><span class="n">fname</span><span class="p">,</span> <span class="s">&quot;wb&quot;</span><span class="p">);</span>
  <span class="k">if</span> <span class="p">(</span><span class="n">fp</span> <span class="o">==</span> <span class="nb">NULL</span><span class="p">)</span> <span class="p">{</span>
    <span class="n">perror</span><span class="p">(</span><span class="n">app_name</span><span class="p">);</span>
    <span class="n">exit</span><span class="p">(</span><span class="mi">-1</span><span class="p">);</span>
  <span class="p">}</span>

  <span class="k">if</span> <span class="p">(</span><span class="n">fwrite</span><span class="p">(</span><span class="n">img</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="n">IMG_SIZE</span><span class="p">,</span> <span class="n">fp</span><span class="p">)</span> <span class="o">!=</span> <span class="n">IMG_SIZE</span><span class="p">)</span> <span class="p">{</span>
    <span class="n">fprintf</span><span class="p">(</span><span class="n">stderr</span><span class="p">,</span> <span class="s">&quot;%s: can&#39;t write image file</span><span class="se">\n</span><span class="s">&quot;</span><span class="p">,</span> <span class="n">app_name</span><span class="p">);</span>
    <span class="n">fclose</span><span class="p">(</span><span class="n">fp</span><span class="p">);</span>
    <span class="n">exit</span><span class="p">(</span><span class="mi">-1</span><span class="p">);</span>
  <span class="p">}</span>
<span class="p">}</span>


<span class="kt">void</span> <span class="n">write_rootfs</span><span class="p">(</span><span class="kt">unsigned</span> <span class="kt">char</span><span class="o">*</span> <span class="n">img</span><span class="p">,</span> <span class="k">const</span> <span class="kt">char</span> <span class="o">*</span><span class="n">fname</span><span class="p">)</span>
<span class="p">{</span>
  <span class="kt">FILE</span> <span class="o">*</span><span class="n">fp</span><span class="p">;</span>

  <span class="n">fp</span> <span class="o">=</span> <span class="n">fopen</span><span class="p">(</span><span class="n">fname</span><span class="p">,</span> <span class="s">&quot;wb&quot;</span><span class="p">);</span>
  <span class="k">if</span> <span class="p">(</span><span class="n">fp</span> <span class="o">==</span> <span class="nb">NULL</span><span class="p">)</span> <span class="p">{</span>
    <span class="n">perror</span><span class="p">(</span><span class="n">app_name</span><span class="p">);</span>
    <span class="n">exit</span><span class="p">(</span><span class="mi">-1</span><span class="p">);</span>
  <span class="p">}</span>
  
  <span class="k">if</span> <span class="p">(</span><span class="n">fwrite</span><span class="p">(</span><span class="n">img</span><span class="o">+</span><span class="n">ROOTFS_START</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="n">ROOTFS_SIZE</span><span class="p">,</span> <span class="n">fp</span><span class="p">)</span> <span class="o">!=</span> <span class="n">ROOTFS_SIZE</span><span class="p">)</span> <span class="p">{</span>
    <span class="n">fprintf</span><span class="p">(</span><span class="n">stderr</span><span class="p">,</span> <span class="s">&quot;%s: can&#39;t write image file</span><span class="se">\n</span><span class="s">&quot;</span><span class="p">,</span> <span class="n">app_name</span><span class="p">);</span>
    <span class="n">fclose</span><span class="p">(</span><span class="n">fp</span><span class="p">);</span>
    <span class="n">exit</span><span class="p">(</span><span class="mi">-1</span><span class="p">);</span>
  <span class="p">}</span>
<span class="p">}</span>


<span class="kt">void</span> <span class="n">write_kernel</span><span class="p">(</span><span class="kt">unsigned</span> <span class="kt">char</span><span class="o">*</span> <span class="n">img</span><span class="p">,</span> <span class="k">const</span> <span class="kt">char</span> <span class="o">*</span><span class="n">fname</span><span class="p">)</span>
<span class="p">{</span>
  <span class="kt">FILE</span> <span class="o">*</span><span class="n">fp</span><span class="p">;</span>

  <span class="n">fp</span> <span class="o">=</span> <span class="n">fopen</span><span class="p">(</span><span class="n">fname</span><span class="p">,</span> <span class="s">&quot;wb&quot;</span><span class="p">);</span>
  <span class="k">if</span> <span class="p">(</span><span class="n">fp</span> <span class="o">==</span> <span class="nb">NULL</span><span class="p">)</span> <span class="p">{</span>
    <span class="n">perror</span><span class="p">(</span><span class="n">app_name</span><span class="p">);</span>
    <span class="n">exit</span><span class="p">(</span><span class="mi">-1</span><span class="p">);</span>
  <span class="p">}</span>
  
  <span class="k">if</span> <span class="p">(</span><span class="n">fwrite</span><span class="p">(</span><span class="n">img</span><span class="o">+</span><span class="n">KERNEL_START</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="n">KERNEL_SIZE</span><span class="p">,</span> <span class="n">fp</span><span class="p">)</span> <span class="o">!=</span> <span class="n">KERNEL_SIZE</span><span class="p">)</span> <span class="p">{</span>
    <span class="n">fprintf</span><span class="p">(</span><span class="n">stderr</span><span class="p">,</span> <span class="s">&quot;%s: can&#39;t write kernel file</span><span class="se">\n</span><span class="s">&quot;</span><span class="p">,</span> <span class="n">app_name</span><span class="p">);</span>
    <span class="n">fclose</span><span class="p">(</span><span class="n">fp</span><span class="p">);</span>
    <span class="n">exit</span><span class="p">(</span><span class="mi">-1</span><span class="p">);</span>
  <span class="p">}</span>
<span class="p">}</span>


<span class="kt">unsigned</span> <span class="kt">char</span><span class="o">*</span> <span class="n">read_rootfs</span><span class="p">(</span><span class="kt">unsigned</span> <span class="kt">char</span><span class="o">*</span> <span class="n">img</span><span class="p">,</span> <span class="k">const</span> <span class="kt">char</span> <span class="o">*</span><span class="n">fname</span><span class="p">)</span>
<span class="p">{</span>
  <span class="kt">FILE</span> <span class="o">*</span><span class="n">fp</span><span class="p">;</span>
  <span class="kt">int</span> <span class="n">size</span><span class="p">;</span>
  <span class="kt">int</span> <span class="n">i</span><span class="p">;</span>

  <span class="k">for</span> <span class="p">(</span><span class="n">i</span><span class="o">=</span><span class="n">ROOTFS_START</span><span class="p">;</span> <span class="n">i</span><span class="o">&lt;</span><span class="n">ROOTFS_START</span><span class="o">+</span><span class="n">ROOTFS_SIZE</span><span class="p">;</span> <span class="n">i</span><span class="o">++</span><span class="p">)</span>
    <span class="n">img</span><span class="p">[</span><span class="n">i</span><span class="p">]</span> <span class="o">=</span> <span class="mh">0xff</span><span class="p">;</span>

  <span class="n">fp</span> <span class="o">=</span> <span class="n">fopen</span><span class="p">(</span><span class="n">fname</span><span class="p">,</span> <span class="s">&quot;rb&quot;</span><span class="p">);</span>
  <span class="k">if</span> <span class="p">(</span><span class="n">fp</span> <span class="o">==</span> <span class="nb">NULL</span><span class="p">)</span> <span class="p">{</span>
    <span class="n">perror</span><span class="p">(</span><span class="n">app_name</span><span class="p">);</span>
    <span class="n">exit</span><span class="p">(</span><span class="mi">-1</span><span class="p">);</span>
  <span class="p">}</span>

  <span class="n">fseek</span><span class="p">(</span><span class="n">fp</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="n">SEEK_END</span><span class="p">);</span>
  <span class="n">size</span> <span class="o">=</span> <span class="n">ftell</span><span class="p">(</span><span class="n">fp</span><span class="p">);</span>
  
  <span class="k">if</span> <span class="p">(</span><span class="n">size</span> <span class="o">&gt;</span> <span class="n">ROOTFS_SIZE</span><span class="p">)</span> <span class="p">{</span>
    <span class="n">fprintf</span><span class="p">(</span><span class="n">stderr</span><span class="p">,</span> <span class="s">&quot;%s: rootfs image file is too big</span><span class="se">\n</span><span class="s">&quot;</span><span class="p">,</span> <span class="n">app_name</span><span class="p">);</span>
    <span class="n">fclose</span><span class="p">(</span><span class="n">fp</span><span class="p">);</span>
    <span class="n">exit</span><span class="p">(</span><span class="mi">-1</span><span class="p">);</span>
  <span class="p">}</span>

  <span class="n">rewind</span><span class="p">(</span><span class="n">fp</span><span class="p">);</span>

  <span class="k">if</span> <span class="p">(</span><span class="n">fread</span><span class="p">(</span><span class="n">img</span><span class="o">+</span><span class="n">ROOTFS_START</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="n">size</span><span class="p">,</span> <span class="n">fp</span><span class="p">)</span> <span class="o">!=</span> <span class="n">size</span><span class="p">)</span> <span class="p">{</span>
    <span class="n">fprintf</span><span class="p">(</span><span class="n">stderr</span><span class="p">,</span> <span class="s">&quot;%s: can&#39;t read rootfs image file</span><span class="se">\n</span><span class="s">&quot;</span><span class="p">,</span> <span class="n">app_name</span><span class="p">);</span>
    <span class="n">fclose</span><span class="p">(</span><span class="n">fp</span><span class="p">);</span>
    <span class="n">exit</span><span class="p">(</span><span class="mi">-1</span><span class="p">);</span>
  <span class="p">}</span>

  <span class="n">fclose</span><span class="p">(</span><span class="n">fp</span><span class="p">);</span>
  <span class="k">return</span> <span class="n">img</span><span class="p">;</span>
<span class="p">}</span>


<span class="kt">unsigned</span> <span class="kt">char</span><span class="o">*</span> <span class="n">read_kernel</span><span class="p">(</span><span class="kt">unsigned</span> <span class="kt">char</span><span class="o">*</span> <span class="n">img</span><span class="p">,</span> <span class="k">const</span> <span class="kt">char</span> <span class="o">*</span><span class="n">fname</span><span class="p">)</span>
<span class="p">{</span>
  <span class="kt">FILE</span> <span class="o">*</span><span class="n">fp</span><span class="p">;</span>
  <span class="kt">int</span> <span class="n">size</span><span class="p">;</span>
  <span class="kt">int</span> <span class="n">i</span><span class="p">;</span>

  <span class="k">for</span> <span class="p">(</span><span class="n">i</span><span class="o">=</span><span class="n">KERNEL_START</span><span class="p">;</span> <span class="n">i</span><span class="o">&lt;</span><span class="n">KERNEL_START</span><span class="o">+</span><span class="n">KERNEL_SIZE</span><span class="p">;</span> <span class="n">i</span><span class="o">++</span><span class="p">)</span>
    <span class="n">img</span><span class="p">[</span><span class="n">i</span><span class="p">]</span> <span class="o">=</span> <span class="mh">0xff</span><span class="p">;</span>

  <span class="n">fp</span> <span class="o">=</span> <span class="n">fopen</span><span class="p">(</span><span class="n">fname</span><span class="p">,</span> <span class="s">&quot;rb&quot;</span><span class="p">);</span>
  <span class="k">if</span> <span class="p">(</span><span class="n">fp</span> <span class="o">==</span> <span class="nb">NULL</span><span class="p">)</span> <span class="p">{</span>
    <span class="n">perror</span><span class="p">(</span><span class="n">app_name</span><span class="p">);</span>
    <span class="n">exit</span><span class="p">(</span><span class="mi">-1</span><span class="p">);</span>
  <span class="p">}</span>

  <span class="n">fseek</span><span class="p">(</span><span class="n">fp</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="n">SEEK_END</span><span class="p">);</span>
  <span class="n">size</span> <span class="o">=</span> <span class="n">ftell</span><span class="p">(</span><span class="n">fp</span><span class="p">);</span>
  
  <span class="k">if</span> <span class="p">(</span><span class="n">size</span> <span class="o">&gt;</span> <span class="n">KERNEL_SIZE</span><span class="p">)</span> <span class="p">{</span>
    <span class="n">fprintf</span><span class="p">(</span><span class="n">stderr</span><span class="p">,</span> <span class="s">&quot;%s: kernel binary file is too big</span><span class="se">\n</span><span class="s">&quot;</span><span class="p">,</span> <span class="n">app_name</span><span class="p">);</span>
    <span class="n">fclose</span><span class="p">(</span><span class="n">fp</span><span class="p">);</span>
    <span class="n">exit</span><span class="p">(</span><span class="mi">-1</span><span class="p">);</span>
  <span class="p">}</span>

  <span class="n">rewind</span><span class="p">(</span><span class="n">fp</span><span class="p">);</span>

  <span class="k">if</span> <span class="p">(</span><span class="n">fread</span><span class="p">(</span><span class="n">img</span><span class="o">+</span><span class="n">KERNEL_START</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="n">size</span><span class="p">,</span> <span class="n">fp</span><span class="p">)</span> <span class="o">!=</span> <span class="n">size</span><span class="p">)</span> <span class="p">{</span>
    <span class="n">fprintf</span><span class="p">(</span><span class="n">stderr</span><span class="p">,</span> <span class="s">&quot;%s: can&#39;t read kernel file</span><span class="se">\n</span><span class="s">&quot;</span><span class="p">,</span> <span class="n">app_name</span><span class="p">);</span>
    <span class="n">fclose</span><span class="p">(</span><span class="n">fp</span><span class="p">);</span>
    <span class="n">exit</span><span class="p">(</span><span class="mi">-1</span><span class="p">);</span>
  <span class="p">}</span>

  <span class="n">fclose</span><span class="p">(</span><span class="n">fp</span><span class="p">);</span>
  <span class="k">return</span> <span class="n">img</span><span class="p">;</span>
<span class="p">}</span>


<span class="kt">int</span> <span class="n">get_checksum</span><span class="p">(</span><span class="kt">unsigned</span> <span class="kt">char</span><span class="o">*</span> <span class="n">img</span><span class="p">)</span>
<span class="p">{</span>
  <span class="kt">short</span> <span class="kt">unsigned</span> <span class="n">s</span><span class="p">;</span>

  <span class="n">s</span> <span class="o">=</span> <span class="n">img</span><span class="p">[</span><span class="mh">0x3dfffc</span><span class="p">]</span> <span class="o">+</span> <span class="p">(</span><span class="n">img</span><span class="p">[</span><span class="mh">0x3dfffd</span><span class="p">]</span><span class="o">&lt;&lt;</span><span class="mi">8</span><span class="p">);</span>

  <span class="k">return</span> <span class="n">s</span><span class="p">;</span>
<span class="p">}</span>


<span class="kt">void</span> <span class="n">set_checksum</span><span class="p">(</span><span class="kt">unsigned</span> <span class="kt">char</span><span class="o">*</span><span class="n">img</span><span class="p">,</span> <span class="kt">unsigned</span> <span class="kt">short</span> <span class="n">sum</span><span class="p">)</span>
<span class="p">{</span>
  <span class="n">img</span><span class="p">[</span><span class="mh">0x3dfffc</span><span class="p">]</span> <span class="o">=</span> <span class="n">sum</span> <span class="o">&amp;</span> <span class="mh">0xff</span><span class="p">;</span>
  <span class="n">img</span><span class="p">[</span><span class="mh">0x3dfffd</span><span class="p">]</span> <span class="o">=</span> <span class="p">(</span><span class="n">sum</span><span class="o">&gt;&gt;</span><span class="mi">8</span><span class="p">)</span> <span class="o">&amp;</span> <span class="mh">0xff</span><span class="p">;</span>
<span class="p">}</span>


<span class="kt">int</span> <span class="n">compute_checksum</span><span class="p">(</span><span class="kt">unsigned</span> <span class="kt">char</span><span class="o">*</span> <span class="n">img</span><span class="p">)</span>
<span class="p">{</span>
  <span class="kt">int</span> <span class="n">i</span><span class="p">;</span>
  <span class="kt">short</span> <span class="n">s</span><span class="o">=</span><span class="mi">0</span><span class="p">;</span>

  <span class="k">for</span> <span class="p">(</span><span class="n">i</span><span class="o">=</span><span class="mi">0</span><span class="p">;</span> <span class="n">i</span><span class="o">&lt;</span><span class="mh">0x3dfffc</span><span class="p">;</span> <span class="n">i</span><span class="o">++</span><span class="p">)</span>
    <span class="n">s</span> <span class="o">+=</span> <span class="n">img</span><span class="p">[</span><span class="n">i</span><span class="p">];</span>

  <span class="k">return</span> <span class="n">s</span><span class="p">;</span>
<span class="p">}</span>


<span class="kt">int</span> <span class="n">main</span><span class="p">(</span><span class="kt">int</span> <span class="n">argc</span><span class="p">,</span> <span class="kt">char</span><span class="o">*</span> <span class="n">argv</span><span class="p">[])</span>
<span class="p">{</span>
  <span class="kt">char</span> <span class="o">*</span><span class="n">img_fname</span>     <span class="o">=</span> <span class="nb">NULL</span><span class="p">;</span>
  <span class="kt">char</span> <span class="o">*</span><span class="n">rootfs_fname</span>  <span class="o">=</span> <span class="nb">NULL</span><span class="p">;</span>
  <span class="kt">char</span> <span class="o">*</span><span class="n">kernel_fname</span>  <span class="o">=</span> <span class="nb">NULL</span><span class="p">;</span>
  <span class="kt">char</span> <span class="o">*</span><span class="n">new_img_fname</span> <span class="o">=</span> <span class="nb">NULL</span><span class="p">;</span>

  <span class="kt">int</span> <span class="n">do_fix_checksum</span> <span class="o">=</span> <span class="mi">0</span><span class="p">;</span>
  <span class="kt">int</span> <span class="n">do_write</span>        <span class="o">=</span> <span class="mi">0</span><span class="p">;</span>
  <span class="kt">int</span> <span class="n">do_write_rootfs</span> <span class="o">=</span> <span class="mi">0</span><span class="p">;</span>
  <span class="kt">int</span> <span class="n">do_read_rootfs</span>  <span class="o">=</span> <span class="mi">0</span><span class="p">;</span>
  <span class="kt">int</span> <span class="n">do_write_kernel</span> <span class="o">=</span> <span class="mi">0</span><span class="p">;</span>
  <span class="kt">int</span> <span class="n">do_read_kernel</span>  <span class="o">=</span> <span class="mi">0</span><span class="p">;</span>

  <span class="kt">int</span> <span class="n">i</span><span class="p">;</span>
  <span class="kt">unsigned</span> <span class="kt">char</span> <span class="o">*</span><span class="n">img</span><span class="p">;</span>
  <span class="kt">unsigned</span> <span class="kt">short</span> <span class="n">img_checksum</span><span class="p">;</span>
  <span class="kt">unsigned</span> <span class="kt">short</span> <span class="n">real_checksum</span><span class="p">;</span>

  <span class="n">app_name</span> <span class="o">=</span> <span class="n">argv</span><span class="p">[</span><span class="mi">0</span><span class="p">];</span>

  <span class="k">for</span> <span class="p">(</span><span class="n">i</span><span class="o">=</span><span class="mi">1</span><span class="p">;</span> <span class="n">i</span><span class="o">&lt;</span><span class="n">argc</span><span class="p">;</span> <span class="n">i</span><span class="o">++</span><span class="p">)</span> <span class="p">{</span>
    <span class="k">if</span> <span class="p">(</span><span class="o">!</span><span class="n">strcmp</span><span class="p">(</span><span class="n">argv</span><span class="p">[</span><span class="n">i</span><span class="p">],</span> <span class="s">&quot;-h&quot;</span><span class="p">))</span> <span class="p">{</span>
      <span class="n">print_usage</span><span class="p">();</span>
      <span class="k">return</span> <span class="mi">0</span><span class="p">;</span>
    <span class="p">}</span>
    <span class="k">else</span> <span class="k">if</span> <span class="p">(</span><span class="o">!</span><span class="n">strcmp</span><span class="p">(</span><span class="n">argv</span><span class="p">[</span><span class="n">i</span><span class="p">],</span> <span class="s">&quot;-f&quot;</span><span class="p">))</span> <span class="p">{</span>
      <span class="n">do_fix_checksum</span> <span class="o">=</span> <span class="mi">1</span><span class="p">;</span>
    <span class="p">}</span>
    <span class="k">else</span> <span class="k">if</span> <span class="p">(</span><span class="o">!</span><span class="n">strcmp</span><span class="p">(</span><span class="n">argv</span><span class="p">[</span><span class="n">i</span><span class="p">],</span> <span class="s">&quot;-x&quot;</span><span class="p">))</span> <span class="p">{</span>
      <span class="k">if</span> <span class="p">(</span><span class="n">i</span><span class="o">+</span><span class="mi">1</span> <span class="o">&gt;=</span> <span class="n">argc</span><span class="p">)</span> <span class="p">{</span>
	<span class="n">fprintf</span><span class="p">(</span><span class="n">stderr</span><span class="p">,</span> <span class="s">&quot;%s: missing argument</span><span class="se">\n</span><span class="s">&quot;</span><span class="p">,</span> <span class="n">app_name</span><span class="p">);</span>
	<span class="k">return</span> <span class="mi">-1</span><span class="p">;</span>
      <span class="p">}</span>
      <span class="n">do_write_rootfs</span> <span class="o">=</span> <span class="mi">1</span><span class="p">;</span>
      <span class="n">rootfs_fname</span> <span class="o">=</span> <span class="n">argv</span><span class="p">[</span><span class="n">i</span><span class="o">+</span><span class="mi">1</span><span class="p">];</span>
      <span class="n">i</span><span class="o">++</span><span class="p">;</span>
    <span class="p">}</span>
    <span class="k">else</span> <span class="k">if</span> <span class="p">(</span><span class="o">!</span><span class="n">strcmp</span><span class="p">(</span><span class="n">argv</span><span class="p">[</span><span class="n">i</span><span class="p">],</span> <span class="s">&quot;-xk&quot;</span><span class="p">))</span> <span class="p">{</span>
      <span class="k">if</span> <span class="p">(</span><span class="n">i</span><span class="o">+</span><span class="mi">1</span> <span class="o">&gt;=</span> <span class="n">argc</span><span class="p">)</span> <span class="p">{</span>
	<span class="n">fprintf</span><span class="p">(</span><span class="n">stderr</span><span class="p">,</span> <span class="s">&quot;%s: missing argument</span><span class="se">\n</span><span class="s">&quot;</span><span class="p">,</span> <span class="n">app_name</span><span class="p">);</span>
	<span class="k">return</span> <span class="mi">-1</span><span class="p">;</span>
      <span class="p">}</span>
      <span class="n">do_write_kernel</span> <span class="o">=</span> <span class="mi">1</span><span class="p">;</span>
      <span class="n">kernel_fname</span> <span class="o">=</span> <span class="n">argv</span><span class="p">[</span><span class="n">i</span><span class="o">+</span><span class="mi">1</span><span class="p">];</span>
      <span class="n">i</span><span class="o">++</span><span class="p">;</span>
    <span class="p">}</span>
    <span class="k">else</span> <span class="k">if</span> <span class="p">(</span><span class="o">!</span><span class="n">strcmp</span><span class="p">(</span><span class="n">argv</span><span class="p">[</span><span class="n">i</span><span class="p">],</span> <span class="s">&quot;-m&quot;</span><span class="p">))</span> <span class="p">{</span>
      <span class="k">if</span> <span class="p">(</span><span class="n">i</span><span class="o">+</span><span class="mi">1</span> <span class="o">&gt;=</span> <span class="n">argc</span><span class="p">)</span> <span class="p">{</span>
	<span class="n">fprintf</span><span class="p">(</span><span class="n">stderr</span><span class="p">,</span> <span class="s">&quot;%s: missing argument</span><span class="se">\n</span><span class="s">&quot;</span><span class="p">,</span> <span class="n">app_name</span><span class="p">);</span>
	<span class="k">return</span> <span class="mi">-1</span><span class="p">;</span>
      <span class="p">}</span>
      <span class="n">do_read_rootfs</span> <span class="o">=</span> <span class="mi">1</span><span class="p">;</span>
      <span class="n">rootfs_fname</span> <span class="o">=</span> <span class="n">argv</span><span class="p">[</span><span class="n">i</span><span class="o">+</span><span class="mi">1</span><span class="p">];</span>
      <span class="n">i</span><span class="o">++</span><span class="p">;</span>
    <span class="p">}</span>
    <span class="k">else</span> <span class="k">if</span> <span class="p">(</span><span class="o">!</span><span class="n">strcmp</span><span class="p">(</span><span class="n">argv</span><span class="p">[</span><span class="n">i</span><span class="p">],</span> <span class="s">&quot;-k&quot;</span><span class="p">))</span> <span class="p">{</span>
      <span class="k">if</span> <span class="p">(</span><span class="n">i</span><span class="o">+</span><span class="mi">1</span> <span class="o">&gt;=</span> <span class="n">argc</span><span class="p">)</span> <span class="p">{</span>
	<span class="n">fprintf</span><span class="p">(</span><span class="n">stderr</span><span class="p">,</span> <span class="s">&quot;%s: missing argument</span><span class="se">\n</span><span class="s">&quot;</span><span class="p">,</span> <span class="n">app_name</span><span class="p">);</span>
	<span class="k">return</span> <span class="mi">-1</span><span class="p">;</span>
      <span class="p">}</span>
      <span class="n">do_read_kernel</span> <span class="o">=</span> <span class="mi">1</span><span class="p">;</span>
      <span class="n">kernel_fname</span> <span class="o">=</span> <span class="n">argv</span><span class="p">[</span><span class="n">i</span><span class="o">+</span><span class="mi">1</span><span class="p">];</span>
      <span class="n">i</span><span class="o">++</span><span class="p">;</span>
    <span class="p">}</span>
    <span class="k">else</span> <span class="k">if</span> <span class="p">(</span><span class="o">!</span><span class="n">strcmp</span><span class="p">(</span><span class="n">argv</span><span class="p">[</span><span class="n">i</span><span class="p">],</span> <span class="s">&quot;-w&quot;</span><span class="p">))</span> <span class="p">{</span>
      <span class="k">if</span> <span class="p">(</span><span class="n">i</span><span class="o">+</span><span class="mi">1</span> <span class="o">&gt;=</span> <span class="n">argc</span><span class="p">)</span> <span class="p">{</span>
	<span class="n">fprintf</span><span class="p">(</span><span class="n">stderr</span><span class="p">,</span> <span class="s">&quot;%s: missing argument</span><span class="se">\n</span><span class="s">&quot;</span><span class="p">,</span> <span class="n">app_name</span><span class="p">);</span>
	<span class="k">return</span> <span class="mi">-1</span><span class="p">;</span>
      <span class="p">}</span>
      <span class="n">do_write</span> <span class="o">=</span> <span class="mi">1</span><span class="p">;</span>
      <span class="n">new_img_fname</span> <span class="o">=</span> <span class="n">argv</span><span class="p">[</span><span class="n">i</span><span class="o">+</span><span class="mi">1</span><span class="p">];</span>
      <span class="n">i</span><span class="o">++</span><span class="p">;</span>
    <span class="p">}</span>
    <span class="k">else</span> <span class="k">if</span> <span class="p">(</span><span class="n">img_fname</span> <span class="o">!=</span> <span class="mi">0</span><span class="p">)</span> <span class="p">{</span>
      <span class="n">fprintf</span><span class="p">(</span><span class="n">stderr</span><span class="p">,</span> <span class="s">&quot;%s: too many arguments</span><span class="se">\n</span><span class="s">&quot;</span><span class="p">,</span> <span class="n">app_name</span><span class="p">);</span>
      <span class="k">return</span> <span class="mi">-1</span><span class="p">;</span>
    <span class="p">}</span>
    <span class="k">else</span> <span class="p">{</span>
      <span class="n">img_fname</span> <span class="o">=</span> <span class="n">argv</span><span class="p">[</span><span class="n">i</span><span class="p">];</span>
    <span class="p">}</span>
  <span class="p">}</span>

  <span class="k">if</span> <span class="p">(</span><span class="n">img_fname</span> <span class="o">==</span> <span class="nb">NULL</span><span class="p">)</span> <span class="p">{</span>
    <span class="n">fprintf</span><span class="p">(</span><span class="n">stderr</span><span class="p">,</span> <span class="s">&quot;%s: missing argument</span><span class="se">\n</span><span class="s">&quot;</span><span class="p">,</span> <span class="n">app_name</span><span class="p">);</span>
    <span class="k">return</span> <span class="mi">-1</span><span class="p">;</span>
  <span class="p">}</span>

  <span class="k">if</span> <span class="p">((</span><span class="n">do_read_rootfs</span> <span class="o">&amp;&amp;</span> <span class="n">do_write_rootfs</span><span class="p">)</span> <span class="o">||</span>
      <span class="p">(</span><span class="n">do_read_kernel</span> <span class="o">&amp;&amp;</span> <span class="n">do_write_kernel</span><span class="p">))</span> <span class="p">{</span>
    <span class="n">fprintf</span><span class="p">(</span><span class="n">stderr</span><span class="p">,</span> <span class="s">&quot;%s: conflictuous options</span><span class="se">\n</span><span class="s">&quot;</span><span class="p">,</span> <span class="n">app_name</span><span class="p">);</span>
    <span class="k">return</span> <span class="mi">-1</span><span class="p">;</span>
  <span class="p">}</span>

  <span class="n">printf</span> <span class="p">(</span><span class="s">&quot;** Read firmware file</span><span class="se">\n</span><span class="s">&quot;</span><span class="p">);</span>
  <span class="n">img</span> <span class="o">=</span> <span class="n">read_img</span><span class="p">(</span><span class="n">img_fname</span><span class="p">);</span>

  <span class="n">printf</span> <span class="p">(</span><span class="s">&quot;Firmware product: %s</span><span class="se">\n</span><span class="s">&quot;</span><span class="p">,</span> <span class="n">img</span><span class="o">+</span><span class="mh">0x3dffbd</span><span class="p">);</span>
  <span class="n">printf</span> <span class="p">(</span><span class="s">&quot;Firmware version: 1.%02d.%02d</span><span class="se">\n</span><span class="s">&quot;</span><span class="p">,</span> <span class="p">(</span><span class="n">img</span><span class="p">[</span><span class="mh">0x3dffeb</span><span class="p">]</span> <span class="o">&amp;</span> <span class="mh">0x7f</span><span class="p">),</span> <span class="n">img</span><span class="p">[</span><span class="mh">0x3dffec</span><span class="p">]);</span>

  <span class="k">if</span> <span class="p">(</span><span class="n">do_write_rootfs</span><span class="p">)</span> <span class="p">{</span>
    <span class="n">printf</span> <span class="p">(</span><span class="s">&quot;** Write rootfs file</span><span class="se">\n</span><span class="s">&quot;</span><span class="p">);</span>
    <span class="n">write_rootfs</span><span class="p">(</span><span class="n">img</span><span class="p">,</span> <span class="n">rootfs_fname</span><span class="p">);</span>
  <span class="p">}</span>

  <span class="k">if</span> <span class="p">(</span><span class="n">do_write_kernel</span><span class="p">)</span> <span class="p">{</span>
    <span class="n">printf</span> <span class="p">(</span><span class="s">&quot;** Write kernel file</span><span class="se">\n</span><span class="s">&quot;</span><span class="p">);</span>
    <span class="n">write_kernel</span><span class="p">(</span><span class="n">img</span><span class="p">,</span> <span class="n">kernel_fname</span><span class="p">);</span>
  <span class="p">}</span>

  <span class="k">if</span> <span class="p">(</span><span class="n">do_read_rootfs</span><span class="p">)</span> <span class="p">{</span>
    <span class="n">printf</span> <span class="p">(</span><span class="s">&quot;** Read rootfs file</span><span class="se">\n</span><span class="s">&quot;</span><span class="p">);</span>
    <span class="n">read_rootfs</span><span class="p">(</span><span class="n">img</span><span class="p">,</span> <span class="n">rootfs_fname</span><span class="p">);</span>
    <span class="n">do_fix_checksum</span> <span class="o">=</span> <span class="mi">1</span><span class="p">;</span>
  <span class="p">}</span>

  <span class="k">if</span> <span class="p">(</span><span class="n">do_read_kernel</span><span class="p">)</span> <span class="p">{</span>
    <span class="n">printf</span> <span class="p">(</span><span class="s">&quot;** Read kernel file</span><span class="se">\n</span><span class="s">&quot;</span><span class="p">);</span>
    <span class="n">read_kernel</span><span class="p">(</span><span class="n">img</span><span class="p">,</span> <span class="n">kernel_fname</span><span class="p">);</span>
    <span class="n">do_fix_checksum</span> <span class="o">=</span> <span class="mi">1</span><span class="p">;</span>
  <span class="p">}</span>

  <span class="n">img_checksum</span> <span class="o">=</span> <span class="n">get_checksum</span><span class="p">(</span><span class="n">img</span><span class="p">);</span>
  <span class="n">real_checksum</span> <span class="o">=</span> <span class="n">compute_checksum</span><span class="p">(</span><span class="n">img</span><span class="p">);</span>
  
  <span class="n">printf</span> <span class="p">(</span><span class="s">&quot;image checksum = %04x</span><span class="se">\n</span><span class="s">&quot;</span><span class="p">,</span> <span class="n">img_checksum</span><span class="p">);</span>
  <span class="n">printf</span> <span class="p">(</span><span class="s">&quot;real checksum  = %04x</span><span class="se">\n</span><span class="s">&quot;</span><span class="p">,</span> <span class="n">real_checksum</span><span class="p">);</span>

  <span class="k">if</span> <span class="p">(</span><span class="n">do_fix_checksum</span><span class="p">)</span> <span class="p">{</span>
    <span class="k">if</span> <span class="p">(</span><span class="n">img_checksum</span> <span class="o">!=</span> <span class="n">real_checksum</span><span class="p">)</span> <span class="p">{</span>
      <span class="n">printf</span> <span class="p">(</span><span class="s">&quot;** Bad Checksum, fix it</span><span class="se">\n</span><span class="s">&quot;</span><span class="p">);</span>
      <span class="n">set_checksum</span><span class="p">(</span><span class="n">img</span><span class="p">,</span> <span class="n">real_checksum</span><span class="p">);</span>
    <span class="p">}</span>
    <span class="k">else</span> <span class="p">{</span>
      <span class="n">printf</span> <span class="p">(</span><span class="s">&quot;** Checksum is correct, good</span><span class="se">\n</span><span class="s">&quot;</span><span class="p">);</span>
    <span class="p">}</span>
  <span class="p">}</span>

  <span class="k">if</span> <span class="p">(</span><span class="n">do_write</span><span class="p">)</span> <span class="p">{</span>
    <span class="n">printf</span> <span class="p">(</span><span class="s">&quot;** Write image file</span><span class="se">\n</span><span class="s">&quot;</span><span class="p">);</span>
    <span class="n">write_img</span><span class="p">(</span><span class="n">img</span><span class="p">,</span> <span class="n">new_img_fname</span><span class="p">);</span>
  <span class="p">}</span>

  <span class="n">free</span><span class="p">(</span><span class="n">img</span><span class="p">);</span>
  <span class="k">return</span> <span class="mi">0</span><span class="p">;</span>
<span class="p">}</span>
</pre></div>
</code></pre></td></tr></table>
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