mirror of https://github.com/captn3m0/Scripts.git
73 lines
2.7 KiB
Bash
Executable File
73 lines
2.7 KiB
Bash
Executable File
#!/bin/sh
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#
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# Copyright (C) 2010 Matthias Buecher (http://www.maddes.net/)
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# Source: https://github.com/mpoullet/shell_examples/blob/master/extract_uImage.sh
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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# http://www.gnu.org/licenses/gpl-2.0.txt
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#
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UIMAGE=$1
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# check for uImage magic word
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# http://git.denx.de/cgi-bin/gitweb.cgi?p=u-boot.git;a=blob;f=include/image.h
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echo 'Checking for uImage magic word...'
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MAGIC=`dd if="${UIMAGE}" ibs=4 count=1 | hexdump -v -e '1/1 "%02X"'`
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[ '27051956' != "${MAGIC}" ] && { echo 'Not an uImage.' ; exit 1 ; }
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# extract data from uImage
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echo 'uImage recognized.'
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echo 'Extracting data...'
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DATAFILE='uImage.data'
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dd if="${UIMAGE}" of="${DATAFILE}" ibs=64 skip=1
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# check for ARM mach type ( xx 1C A0 E3 xx 10 81 E3 )
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# http://www.simtec.co.uk/products/SWLINUX/files/booting_article.html#d0e600
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echo 'Checking for ARM mach-type...'
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MAGIC=`dd if="${DATAFILE}" ibs=1 skip=1 count=3 | hexdump -v -e '1/1 "%02X"'`
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[ '1CA0E3' = "${MAGIC}" ] && {
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MAGIC=`dd if="${DATAFILE}" ibs=1 skip=5 count=3 | hexdump -v -e '1/1 "%02X"'`
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[ '1081E3' = "${MAGIC}" ] && {
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echo 'ARM mach-type header recognized.'
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echo 'Extracting mach-type header...'
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dd if="${DATAFILE}" of="uImage.mach-type" ibs=8 count=1
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ARCH=$(hexdump -v -e '1/1 "%02X "' uImage.mach-type); echo "The mach-type is: $ARCH"
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echo 'Stripping mach-type header...'
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TMPFILE='uImage.tmp'
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dd if="${DATAFILE}" of="${TMPFILE}" ibs=8 skip=1
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rm -f "${DATAFILE}"
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mv "${TMPFILE}" "${DATAFILE}"
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}
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}
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# check for zImage, otherwise assume Image
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# http://www.simtec.co.uk/products/SWLINUX/files/booting_article.html#d0e309
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TMPFILE='Image'
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echo 'Checking for zImage...'
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MAGIC=`dd if="${DATAFILE}" ibs=4 skip=9 count=1 | hexdump -v -e '1/1 "%02X"'`
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[ '18286F01' = "${MAGIC}" ] && {
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START=`dd if="${DATAFILE}" ibs=4 skip=10 count=1 | hexdump -v -e '1/4 "%08X"'`
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END=`dd if="${DATAFILE}" ibs=4 skip=11 count=1 | hexdump -v -e '1/4 "%08X"'`
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#
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SIZE=$(( 0x${END} - 0x${START} ))
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#
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echo "zImage recognized with start 0x${START}, end 0x${END} and size ${SIZE}."
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TMPFILE='zImage'
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}
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mv "${DATAFILE}" "${TMPFILE}"
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echo ">>> ${UIMAGE} extracted to ${TMPFILE}"
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