• Guilherme Maciel Ferreira's avatar
    Add dumpimage, a tool to extract data from U-Boot images · a804b5ce
    Guilherme Maciel Ferreira authored
    Given a multi-file image created through the mkimage's -d option:
    
      $ mkimage -A x86 -O linux -T multi -n x86 -d vmlinuz:initrd.img:System.map \
      multi.img
    
      Image Name:   x86
      Created:      Thu Jul 25 10:29:13 2013
      Image Type:   Intel x86 Linux Multi-File Image (gzip compressed)
      Data Size:    13722956 Bytes = 13401.32 kB = 13.09 MB
      Load Address: 00000000
      Entry Point:  00000000
      Contents:
         Image 0: 4040128 Bytes = 3945.44 kB = 3.85 MB
         Image 1: 7991719 Bytes = 7804.41 kB = 7.62 MB
         Image 2: 1691092 Bytes = 1651.46 kB = 1.61 MB
    
    It is possible to perform the innverse operation -- extracting any file from
    the image -- by using the dumpimage's -i option:
    
      $ dumpimage -i multi.img -p 2 System.map
    
    Although it's feasible to retrieve "data files" from image through scripting,
    the requirement to embed tools such 'dd', 'awk' and 'sed' for this sole purpose
    is cumbersome and unreliable -- once you must keep track of file sizes inside
    the image. Furthermore, extracting data files using "dumpimage" tool is faster
    than through scripting.
    Signed-off-by: default avatarGuilherme Maciel Ferreira <guilherme.maciel.ferreira@gmail.com>
    Signed-off-by: Simon Glass's avatarSimon Glass <sjg@chromium.org>
    a804b5ce