add_xhdr.sh

#!/bin/bash

source ../../build/tools/secure_hsm/secure/sb_info.sh_inc

# $1: val
# $2: 1=no reverse
# $3: 1=have secure boot signature
# $4: header name

function gen_bin_tmp
{
	#echo $1
	if [ "$2" = "1" ];then
		printf "0: %.8x" $1 | xxd -r -g0 >tmp
	else
		printf "0: %.8x" $1 | sed -E 's/0: (..)(..)(..)(..)/0: \4\3\2\1/' | xxd -r -g0 >tmp
	fi
	#hexdump -C tmp
}

if [ $# -lt 3 ];then
	echo "Error: $0 missed arguments"
	exit 1
fi

input=$1
output=$2
img_flag=$3
header_name=$4
rel_id=$5 


sz=`stat -c%s $1`
finalsz=$((64 + sz))

#chksum=`md5sum $input |cut -c 1-8`
#chksum=`./tools/tcpsum $input |cut -c 1-4`
curdir=`dirname $0`
chksum=`${curdir}/tools/tcpsum $input |cut -c 1-4`
chksum="0000$chksum"
echo "chksum=$chksum"

# header size is 32 (0x20)
dd if=/dev/zero of=$output bs=1 count=32 2>/dev/null


##############
# 4-byte magic
if [ "$4" = "im1d" ];then
	val=$((0x64316d69)) # im1d (i=69h)
elif [ "$4" = "dm1d" ];then
	val=$((0x64316d64)) # dm1d (d=64h)
elif [ "$4" = "im2d" ];then
	val=$((0x64326d69)) # im2d (i=69h)
elif [ "$4" = "dm2d" ];then
	val=$((0x64326d64)) # dm2d (d=64h)
elif [ "$4" = "imda" ];then
	val=$((0x6a646d69)) # imda (i=69h)
elif [ "$4" = "dmda" ];then
	val=$((0x6a646d64)) # dmda (d=64h)	
else
	val=$((0x54554258)) # XBUT (X=58h)
fi
gen_bin_tmp $val
dd if=tmp of=$output conv=notrunc bs=1 count=4 seek=0 2>/dev/null

##############
# 4-byte version=0

##############
# 4-byte length of bin (exhclude header)
val=$sz
gen_bin_tmp $val
dd if=tmp of=$output conv=notrunc bs=1 count=4 seek=8 2>/dev/null

##############
# 4-byte checksum
val=$((0x$chksum))
gen_bin_tmp $val 0
dd if=tmp of=$output conv=notrunc bs=1 count=4 seek=12 2>/dev/null

##############
# 4-byte img_flag
val=$img_flag
gen_bin_tmp $val 0
dd if=tmp of=$output conv=notrunc bs=1 count=4 seek=16 2>/dev/null

##############
# 12-byte reserved => modification
##############
# 4-byte build_epoch
val=$((`date +%s`))
gen_bin_tmp $val 0
dd if=tmp of=$output conv=notrunc bs=1 count=4 seek=20 2>/dev/null
##############
# 4-byte offs_sb
val=$((sz - SB_INFO_SIZE)) #xboot.bin offset to sb_info
gen_bin_tmp $val 0
dd if=tmp of=$output conv=notrunc bs=1 count=4 seek=24 2>/dev/null
##############
# 4-byte project release ID
val=$((rel_id))
gen_bin_tmp $val 0
dd if=tmp of=$output conv=notrunc bs=1 count=4 seek=28 2>/dev/null

##############
# bin content
dd if=$input of=$2 conv=notrunc bs=1 seek=32 2>/dev/null

rm tmp