buildrom-devel/bin/construct-rom.sh

   1 #!/bin/sh -e
   2 # Usage: ./construct-rom.sh [-p] components ...
   3
   4 DOPAD=0
   5
   6 if [ "$1" = "-p" ]; then
   7         DOPAD=1
   8         shift
   9 fi
  10
  11 COMPONENTS=$*
  12
  13 if [ $DOPAD -eq 1 ]; then
  14
  15         ROMSIZE=0
  16
  17         # Get the size of all the components together
  18
  19         for c in $COMPONENTS; do
  20                 size=`du -b $c | cut -f1`
  21                 ROMSIZE=`expr $ROMSIZE + $size` || true
  22         done
  23
  24         # Pad to a power of 2, starting with 128k
  25         RSIZE=131072
  26
  27         while true; do
  28                 PAD=0
  29
  30                 if [ $ROMSIZE -gt $RSIZE ]; then
  31                         RSIZE=`expr $RSIZE "*" 2`
  32                         continue
  33                 fi
  34
  35                 if [ $ROMSIZE -lt $RSIZE ]; then
  36                         PAD=`expr $RSIZE - $ROMSIZE`
  37                 fi
  38
  39                 break
  40         done
  41
  42         PADFILE=`mktemp`
  43         dd if=/dev/zero of=$PADFILE bs=1 count=$PAD > /dev/null 2>&1
  44         COMPONENTS="$PADFILE $COMPONENTS"
  45 fi
  46
  47 cat $COMPONENTS
  48
  49 if [ $DOPAD -eq 1 ]; then
  50         rm -rf $PADFILE
  51 fi