mirror of https://github.com/hak5/openwrt.git
597 lines
14 KiB
Bash
597 lines
14 KiB
Bash
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#!/usr/bin/env bash
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#
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# Licensed under the terms of the GNU GPL License version 2 or later.
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#
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# Author: Jason Wu <jason.hy.wu@gmail.com>
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# with modifications for multi-DTB-same-image by:
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# Mathew McBride <matt@traverse.com.au>
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#
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# U-Boot firmware supports the booting of images in the Flattened Image
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# Tree (FIT) format. The FIT format uses a device tree structure to
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# describe a kernel image, device tree blob, ramdisk, etc. This script
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# creates an Image Tree Source (.its file) which can be passed to the
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# 'mkimage' utility to generate an Image Tree Blob (.itb file). The .itb
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# file can then be booted by U-Boot (or other bootloaders which support
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# FIT images). See doc/uImage.FIT/howto.txt in U-Boot source code for
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# additional information on FIT images.
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#
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# This tools supports:
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# - multi-configuration
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# - multi-image support - multiple kernel/fdt/ramdsik
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# - per image configuration:
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# - hash algorithm and generated required subnodes
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# - compression
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# - signature and generated required subnodes
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#
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set -e
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# image config limit
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MAX_IMG=50
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# conf config limit
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MAX_CONF=10
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# declare main data array
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declare -a img_array
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declare -a conf_array
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# initialize array with empty values
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for (( index=1; index<=$MAX_IMG; index++ )); do
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declare -a img$index
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for i in {0..13}; do
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eval img${index}[$i]=""
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done
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done
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for (( index=1; index<=$MAX_CONF; index++ )); do
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declare -a conf$index
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for i in {0..9}; do
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eval conf${index}[$i]=""
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done
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done
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# imgX array index information
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# 0: type of image - kernel, fdt, ramdsik
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# 1: image location
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# 2: image index
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# 3: loadaddr of image
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# 4: entrypoint of image
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# 5: compression
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# 6: hash algorithm
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# 7: part of the configuration
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# 8: Human friend name for the image
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# 9: key file name
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# 10: signature
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# 11: conf friendly name
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# confX array index information
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# 0: conf number
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# 1: kernel conf
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# 2: fdt conf
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# 3: rootfs conf
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# 4: kernel key file
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# 5: fdt key file
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# 6: rootfs key file
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# 7: kernel sign_algorithm
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# 8: fdt sign_algorithm
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# 9: rootfs sign_algorithm
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# 10: conf friendly name
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usage() {
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echo "Usage: `basename $0` -A arch -v version -o its_file" \
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"-k kernel -a addr -e entry [-C none] [-h sha1] [-c conf]"
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echo -e "Example1:\n\tkernel image ker_img1 with no compression +"
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echo -e "\tsha1 hash + fdt dtb1 with sha1 and crc32 hash for conf 1"
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echo -e "\t $ `basename $0` -A arm -v 4.4 \ "
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echo -e "\t -k ker_img1 -C none -h sha1 -e 0x8000 -a 0x8000 -c 1 \ "
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echo -e "\t -d dtb1 -h sha1 -h crc32 -c 1\n"
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echo "General settings:"
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echo -e "\t-A ==> set architecture to 'arch'"
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echo -e "\t-v ==> set kernel version to 'version'"
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echo -e "\t-o ==> create output file 'its_file' [optional]"
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echo "Input image type:"
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echo -e "\t-k ==> kernel image 'kernel'"
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echo -e "\t-d ==> Device Tree Blob 'dtb'"
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echo -e "\t-r ==> ramdisk image 'ramdisk"
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echo "Per image configurations:"
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echo -e "\t-C ==> set compression type 'comp'"
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echo -e "\t-c ==> set image config (multiple -c allowed)"
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echo -e "\t-a ==> set load address to 'addr' (hex)"
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echo -e "\t-e ==> set entry point to 'entry' (hex)"
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echo -e "\t-D ==> human friendly 'name' (one word only)"
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echo -e "\t-h ==> set hash algorithm (multiple -h allowed)"
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echo -e "\t-s ==> set signature for given config image"
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echo -e "\t-K ==> set key file for given config image"
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exit 1
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}
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array_check()
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{
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local a=999
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local max_a=0
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local max_i=0
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if echo $1 | grep -q img; then
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max_a=$MAX_IMG
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max_i=13
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let a=$(echo $1 | awk -F "img" '{print $2}')
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elif echo $1 | grep -q conf; then
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max_a=$MAX_CONF
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max_i=10
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let a=$(echo $1 | awk -F "conf" '{print $2}')
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fi
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if [ ${a} -lt 0 -o ${a} -gt ${max_a} -o \
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${2} -lt 0 -o ${2} -gt ${max_i} ]; then
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echo "WARNING: Invalid array name, skipping!!!"
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return 255
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fi
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}
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#
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# $1: array name
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# $2: index
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# $3: value
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# $4: append operation
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#
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array_put()
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{
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# check if array is declared
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array_check $1 $2 || return 0
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if [ -z "$4" ]; then
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eval $1[$2]=$3
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else
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eval $1[$2]=\"\${$1[$2]} $3\"
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fi
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}
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#
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# $1: array name
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# $2: index
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#
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array_get()
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{
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local val
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eval val=\${$1[$2]}
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echo $val
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}
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parse_args() {
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local i=-1 k=-1 d=-1 r=-1
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while getopts ":A:a:C:c:D:d:e:h:k:K:o:v:r:s:n:" OPTION; do
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case $OPTION in
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A ) ARCH=$OPTARG;;
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a ) array_put img$i 3 $OPTARG;;
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C ) value_sanity_chk compression $OPTARG;
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array_put img$i 5 $OPTARG;;
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c ) array_put img$i 7 $OPTARG append;;
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D ) array_put img$i 8 $OPTARG;;
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d ) i=$(($i + 1));
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d=$(($d + 1));
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img_array[$i]=img$i;
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array_put img$i 0 fdt;
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array_put img$i 1 $OPTARG;
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array_put img$i 2 $d;
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;;
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e ) array_put img$i 4 $OPTARG;;
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h ) value_sanity_chk hash $OPTARG;
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array_put img$i 6 $OPTARG append;;
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k ) i=$(($i + 1));
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k=$(($k + 1));
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img_array[$i]=img$i;
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array_put img$i 0 "kernel";
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array_put img$i 1 $OPTARG;
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array_put img$i 2 $k;
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;;
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K ) array_put img$i 9 $OPTARG;;
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n ) array_put img$i 11 $OPTARG;;
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o ) OUTPUT=$OPTARG;;
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v ) VERSION=$OPTARG;;
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r ) i=$(($i + 1));
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r=$(($r + 1));
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img_array[$i]=img$i;
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array_put img$i 0 "ramdisk";
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array_put img$i 1 $OPTARG;
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array_put img$i 2 $r;
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;;
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s ) value_sanity_chk signature $OPTARG;
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array_put img$i 10 $OPTARG;
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;;
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* ) echo "Invalid option passed to '$0' (options:$@)"
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usage;;
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esac
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done
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[ -n "${OUTPUT}" ] || OUTPUT=fitimage.its
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[ -n "${VERSION}" ] || VERSION="Unknown"
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[ -n "${ARCH}" ] || ARCH=arm
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}
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#
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# sanity check for signature, compression and hash
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#
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value_sanity_chk()
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{
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local valid=""
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case $1 in
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signature) valid="sha-1,rsa-2048 sha-256,rsa-2048 sha-256,rsa-4096";;
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compression) valid="gzip bzip2 none";;
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hash) valid="sha1 md5 crc32";;
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esac
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if ! echo $valid | grep -q "$2"; then
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echo "Error: Invalid $1 provided '$2'"
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echo "Valid options are: $valid"
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exit 255
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fi
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}
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#
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# Emit the fitImage section bits
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#
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# $1: Section bit type: fitstart - its header
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# imagestart - image section start
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# confstart - configuration section start
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# sectend - section end
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# fitend - fitimage end
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# $2: optional variable for confstart section
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#
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emit_its() {
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case $1 in
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fitstart)
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cat << EOF > ${OUTPUT}
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/dts-v1/;
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/ {
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description = "U-Boot fitImage for ${VERSION} kernel";
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#address-cells = <1>;
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EOF
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;;
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imagestart)
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echo -e "\n\timages {" >> ${OUTPUT};;
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confstart)
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# echo -e "\tconfigurations {\n\t\tdefault = \"conf@${2:-0}\";" \
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echo -e "\tconfigurations {\n" \
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>> ${OUTPUT};;
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sectend)
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echo -e "\t};" >> ${OUTPUT};;
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fitend)
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echo -e "};" >> ${OUTPUT};;
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esac
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}
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#
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# Emit kernel image node
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#
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emit_kernel() {
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local image=${1}
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local count=${2:-${MAX_IMG}}
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local loaddaddr=${3:-0x8000}
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local entrypoint=${4:-0x8000}
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local compresson=${5:-none}
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local checksum=${6:-sha1}
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local name=${7}
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[ -z "${name}" ] || name=" ${name}"
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cat << EOF >> ${OUTPUT}
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kernel@${count} {
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description = "Linux Kernel${name}";
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data = /incbin/("${image}");
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type = "kernel";
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arch = "${ARCH}";
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os = "linux";
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compression = "${compresson}";
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load = <${loaddaddr}>;
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entry = <${entrypoint}>;
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EOF
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emit_cksum ${checksum}
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if [ -z "$SIGN_IN_CONF" ] ; then
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emit_signature "$9" "" "" "$8" "" ""
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fi
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echo " };" >> ${OUTPUT}
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}
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#
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# Emit fdt node
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#
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emit_fdt() {
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local image=${1}
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local count=${2:-${MAX_IMG}}
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local compresson=${3:-none}
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local checksum=${4:-sha1}
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local name=${5}
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local loadaddr=${6}
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[ -z "${name}" ] || name=" ${name}"
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cat << EOF >> ${OUTPUT}
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fdt@${count} {
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description = "Flattened Device Tree blob${name}";
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data = /incbin/("${image}");
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type = "flat_dt";
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arch = "${ARCH}";
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load = <${loadaddr}>;
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compression = "none";
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EOF
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emit_cksum ${checksum}
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if [ -z "$SIGN_IN_CONF" ] ; then
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emit_signature "" "$7" "" "" "$6" ""
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fi
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echo " };" >> ${OUTPUT}
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}
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#
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# Emit ramdisk node
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#
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emit_ramdisk() {
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local image=${1}
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local count=${2:-${MAX_IMG}}
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local compresson=${3:-none}
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local checksum=${4:-sha1}
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local name=${5}
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[ -z "${name}" ] || name=" ${name}"
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cat << EOF >> ${OUTPUT}
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ramdisk@${count} {
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description = "ramdisk${name}";
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data = /incbin/("${image}");
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type = "ramdisk";
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arch = "${ARCH}";
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os = "linux";
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compression = "${compresson}";
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EOF
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emit_cksum ${checksum}
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if [ -z "$SIGN_IN_CONF" ] ; then
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emit_signature "" "" "$7" "" "" "$6"
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fi
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echo " };" >> ${OUTPUT}
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}
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#
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# Emit check sum sub node
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#
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emit_cksum() {
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csum_list=$@
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count=1
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for csum in ${csum_list}; do
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cat << EOF >> ${OUTPUT}
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hash@${count} {
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algo = "${csum}";
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};
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EOF
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count=`expr ${count} + 1`
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done
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}
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#
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# Emit signature sub node
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#
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emit_signature() {
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local kernel=$1
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local fdt=$2
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local rootfs=$3
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local kernel_key=$4
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local fdt_key=$5
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local rootfs_key=$6
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local imgs=""
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local count=0
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local chk_list="" algo="" algos="" i=""
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for i in kernel fdt rootfs; do
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eval algo=\$$i
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eval key=\$${i}_key
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[ -n "$algo" ] || continue
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if ! echo "$algos" | grep -q $algo; then
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|
if [ -z "$algos" ]; then
|
||
|
|
algos=$algo
|
||
|
|
else
|
||
|
|
algos="${algos} $algo"
|
||
|
|
fi
|
||
|
|
fi
|
||
|
|
if ! echo "$keys" | grep -q $key; then
|
||
|
|
if [ -z "$keys" ]; then
|
||
|
|
keys=$key
|
||
|
|
else
|
||
|
|
keys="${keys} $key"
|
||
|
|
fi
|
||
|
|
fi
|
||
|
|
done
|
||
|
|
|
||
|
|
for algo in $algos; do
|
||
|
|
for key in $keys; do
|
||
|
|
img=""
|
||
|
|
for i in kernel fdt rootfs; do
|
||
|
|
eval tmp_algo=\$$i
|
||
|
|
eval tmp_key=\$${i}_key
|
||
|
|
[ "$tmp_algo" == "$algo" ] || continue
|
||
|
|
[ "$tmp_key" == "$key" ] || continue
|
||
|
|
if [ -z "$img" ]; then
|
||
|
|
img=$i
|
||
|
|
else
|
||
|
|
img=${img},$i
|
||
|
|
fi
|
||
|
|
done
|
||
|
|
|
||
|
|
[ -n "$img" ] || continue
|
||
|
|
cat << EOF >> ${OUTPUT}
|
||
|
|
signature@${count} {
|
||
|
|
algo = "${algo}";
|
||
|
|
key-name-hint = "${key}";
|
||
|
|
EOF
|
||
|
|
if [ -n "$SIGN_IN_CONF" ] ; then
|
||
|
|
echo " sign-images = \"$img\";" >> ${OUTPUT}
|
||
|
|
fi
|
||
|
|
echo " };" >> ${OUTPUT}
|
||
|
|
|
||
|
|
count=`expr ${count} + 1`
|
||
|
|
done
|
||
|
|
done
|
||
|
|
}
|
||
|
|
|
||
|
|
#
|
||
|
|
# Emit config sub nodes
|
||
|
|
#
|
||
|
|
emit_config() {
|
||
|
|
local conf_csum="sha1"
|
||
|
|
|
||
|
|
config_name="conf@${1}"
|
||
|
|
if [ ! -z "${11}" ]; then
|
||
|
|
config_name="${11}"
|
||
|
|
fi
|
||
|
|
if [ -z "${2}" ]; then
|
||
|
|
echo "Error: config has no kernel img, skipping conf node!"
|
||
|
|
return 0
|
||
|
|
fi
|
||
|
|
|
||
|
|
# Test if we have any DTBs at all
|
||
|
|
if [ -z "${3}" ] ; then
|
||
|
|
conf_desc="Boot Linux kernel"
|
||
|
|
fdt_line=""
|
||
|
|
else
|
||
|
|
conf_desc="Boot Linux kernel with FDT blob"
|
||
|
|
fdt_line="
|
||
|
|
fdt = \"fdt@${3}\";"
|
||
|
|
fi
|
||
|
|
|
||
|
|
# Test if we have any ROOTFS at all
|
||
|
|
if [ -n "${4}" ] ; then
|
||
|
|
conf_desc="$conf_desc + ramdisk"
|
||
|
|
fdt_line="${fdt_line}
|
||
|
|
ramdisk = \"ramdisk@${4}\";"
|
||
|
|
fi
|
||
|
|
|
||
|
|
kernel_line="kernel = \"kernel@${2}\";"
|
||
|
|
|
||
|
|
cat << EOF >> ${OUTPUT}
|
||
|
|
${config_name} {
|
||
|
|
description = "${conf_desc}";
|
||
|
|
${kernel_line}${fdt_line}
|
||
|
|
hash@1 {
|
||
|
|
algo = "${conf_csum}";
|
||
|
|
};
|
||
|
|
EOF
|
||
|
|
if [ -n "$SIGN_IN_CONF" ] ; then
|
||
|
|
emit_signature "$5" "$6" "$7" "$8" "$9" "${10}"
|
||
|
|
fi
|
||
|
|
|
||
|
|
echo " };" >> ${OUTPUT}
|
||
|
|
}
|
||
|
|
|
||
|
|
#
|
||
|
|
# remove prefix space
|
||
|
|
#
|
||
|
|
remove_prefix_space()
|
||
|
|
{
|
||
|
|
echo "$@" | sed "s:^ ::g"
|
||
|
|
}
|
||
|
|
|
||
|
|
#
|
||
|
|
# generate image nodes and its subnodes
|
||
|
|
#
|
||
|
|
emit_image_nodes()
|
||
|
|
{
|
||
|
|
local t img_c img_i img_index chk
|
||
|
|
local img_type img_path img_count img_loadadr img_entrypoint \
|
||
|
|
img_compression img_hash img_conf img_name img_key img_sign \
|
||
|
|
img_index
|
||
|
|
|
||
|
|
emit_its imagestart
|
||
|
|
for t in "kernel" "fdt" "ramdisk"; do
|
||
|
|
img_index=0
|
||
|
|
for a in ${img_array[@]}; do
|
||
|
|
img_type=$(array_get $a 0)
|
||
|
|
img_path=$(array_get $a 1)
|
||
|
|
img_count=$(array_get $a 2)
|
||
|
|
img_loadadr=$(array_get $a 3)
|
||
|
|
img_entrypoint=$(array_get $a 4)
|
||
|
|
img_compression=$(array_get $a 5)
|
||
|
|
img_hash=$(array_get $a 6)
|
||
|
|
img_conf=$(array_get $a 7)
|
||
|
|
img_name=$(array_get $a 8)
|
||
|
|
img_key=$(array_get $a 9)
|
||
|
|
img_sign=$(array_get $a 10)
|
||
|
|
img_cname=$(array_get $a 11)
|
||
|
|
|
||
|
|
img_conf=$(remove_prefix_space $img_conf)
|
||
|
|
img_hash=$(remove_prefix_space $img_hash)
|
||
|
|
|
||
|
|
[ "${img_type}" == $t ] || continue
|
||
|
|
# generate sub nodes
|
||
|
|
eval chk=\$DEF_$t
|
||
|
|
[ -n "${chk}" ] || eval DEF_$t=$img_count
|
||
|
|
case $t in
|
||
|
|
kernel) emit_kernel "$img_path" "$img_count" \
|
||
|
|
"$img_loadadr" "$img_entrypoint" \
|
||
|
|
"$img_compression" "$img_hash" \
|
||
|
|
"$img_name" "$img_key" "$img_sign";;
|
||
|
|
fdt) emit_fdt "$img_path" "$img_count" \
|
||
|
|
"$img_compression" "$img_hash" \
|
||
|
|
"$img_name" "$img_loadadr" "$img_key" "$img_sign" ;;
|
||
|
|
|
||
|
|
ramdisk) emit_ramdisk "$img_path" "$img_count" \
|
||
|
|
"$img_compression" "$img_hash" \
|
||
|
|
"$img_name" "$img_key" "$img_sign";;
|
||
|
|
esac
|
||
|
|
|
||
|
|
# set up configuration data
|
||
|
|
for img_c in $img_conf; do
|
||
|
|
img_i=""
|
||
|
|
#set up default configuration if its not set
|
||
|
|
[ -n "$DEF_CONFIG" ] || DEF_CONFIG=$img_c
|
||
|
|
[ -z "${img_c}" ] || conf_array[$img_c]=conf$img_c
|
||
|
|
array_put conf$img_c 0 ${img_c}
|
||
|
|
case $t in
|
||
|
|
kernel) img_i=1;;
|
||
|
|
fdt) img_i=2;;
|
||
|
|
ramdisk) img_i=3;;
|
||
|
|
esac
|
||
|
|
array_put conf$img_c $img_i $img_index
|
||
|
|
array_put conf$img_c $(($img_i + 3)) ${img_sign}
|
||
|
|
array_put conf$img_c $(($img_i + 6)) ${img_key}
|
||
|
|
array_put conf$img_c 10 $img_cname
|
||
|
|
done
|
||
|
|
img_index=$((img_index + 1))
|
||
|
|
done
|
||
|
|
done
|
||
|
|
emit_its sectend
|
||
|
|
}
|
||
|
|
|
||
|
|
#
|
||
|
|
# generate configuration node and its subnodes
|
||
|
|
#
|
||
|
|
emit_configuration_nodes ()
|
||
|
|
{
|
||
|
|
local count kernel fdt ramdisk ker_file fdt_file rfs_file ker_sign \
|
||
|
|
fdt_sign rfs_sign
|
||
|
|
emit_its confstart $DEF_CONFIG
|
||
|
|
for a in ${conf_array[@]}; do
|
||
|
|
count=$(array_get $a 0)
|
||
|
|
kernel=$(array_get $a 1)
|
||
|
|
fdt=$(array_get $a 2)
|
||
|
|
ramdisk=$(array_get $a 3)
|
||
|
|
er_file=$(array_get $a 4)
|
||
|
|
fdt_file=$(array_get $a 5)
|
||
|
|
rfs_file=$(array_get $a 6)
|
||
|
|
ker_sign=$(array_get $a 7)
|
||
|
|
fdt_sign=$(array_get $a 8)
|
||
|
|
rfs_sign=$(array_get $a 9)
|
||
|
|
cname=$(array_get $a 10)
|
||
|
|
emit_config "$count" "$kernel" "$fdt" "$ramdisk" "$ker_file" \
|
||
|
|
"$fdt_file" "$rfs_file" "$ker_sign" "$fdt_sign" \
|
||
|
|
"$rfs_sign" "${cname}"
|
||
|
|
done
|
||
|
|
if [ -z "${DEF_CONFIG}" ]; then
|
||
|
|
emit_config "0" "$DEF_kernel" "$DEF_fdt" "$DEF_ramdisk"
|
||
|
|
fi
|
||
|
|
emit_its sectend
|
||
|
|
}
|
||
|
|
|
||
|
|
# Set to none empty to create signature sub node under images node
|
||
|
|
SIGN_IN_CONF=${SIGN_IN_CONF:-""}
|
||
|
|
# Set to default config used
|
||
|
|
DEF_CONFIG=${DEF_CONFIG:-""}
|
||
|
|
|
||
|
|
parse_args $@
|
||
|
|
|
||
|
|
emit_its fitstart
|
||
|
|
emit_image_nodes
|
||
|
|
emit_configuration_nodes
|
||
|
|
emit_its fitend
|