build: add mkrasimage
The current make-ras.sh image generation script for the ZyXEL NBG6617 has portability issues with bash. Because of this, factory images are currently not built correctly by the OpenWRT buildbots. This commit replaces the make-ras.sh by C-written mkrasimage. The new mkrasimage is also compatible with other ZyXEL devices using the ras image-format. This is not tested with the NBG6616 but it correctly builds the header for ZyXEL factory image. Signed-off-by: David Bauer <mail@david-bauer.net>
This commit is contained in:
David Bauer
committed by
John Crispin
John Crispin
parent
8132e06247
commit
8e9a59a6b9
@@ -1,196 +0,0 @@
|
||||
#!/usr/bin/env bash
|
||||
#
|
||||
# --- ZyXEL header format ---
|
||||
# Original Version by Benjamin Berg <benjamin@sipsolutions.net>
|
||||
#
|
||||
# The firmware image prefixed with a header (which is written into the MTD device).
|
||||
# The header is one erase block (~64KiB) in size, but the checksum only convers the
|
||||
# first 2KiB. Padding is 0xff. All integers are in big-endian.
|
||||
#
|
||||
# The checksum is always a 16-Bit System V checksum (sum -s) stored in a 32-Bit integer.
|
||||
#
|
||||
# 4 bytes: checksum of the rootfs image
|
||||
# 4 bytes: length of the contained rootfs image file (big endian)
|
||||
# 32 bytes: Firmware Version string (NUL terminated, 0xff padded)
|
||||
# 4 bytes: checksum over the header partition (big endian - see below)
|
||||
# 32 bytes: Model (e.g. "NBG6617", NUL termiated, 0xff padded)
|
||||
# 4 bytes: checksum of the kernel partition
|
||||
# 4 bytes: length of the contained kernel image file (big endian)
|
||||
# rest: 0xff padding
|
||||
#
|
||||
# The checksums are calculated by adding up all bytes and if a 16bit
|
||||
# overflow occurs, one is added and the sum is masked to 16 bit:
|
||||
# csum = csum + databyte; if (csum > 0xffff) { csum += 1; csum &= 0xffff };
|
||||
# Should the file have an odd number of bytes then the byte len-0x800 is
|
||||
# used additionally.
|
||||
#
|
||||
# The checksum for the header is calculated over the first 2048 bytes with
|
||||
# the rootfs image checksum as the placeholder during calculation.
|
||||
#
|
||||
# The header is padded with 0xff to the erase block size of the device.
|
||||
#
|
||||
board=""
|
||||
version=""
|
||||
kernel=""
|
||||
rootfs=""
|
||||
outfile=""
|
||||
err=""
|
||||
|
||||
while [ "$1" ]; do
|
||||
case "$1" in
|
||||
"--board")
|
||||
board="$2"
|
||||
shift
|
||||
shift
|
||||
continue
|
||||
;;
|
||||
"--version")
|
||||
version="$2"
|
||||
shift
|
||||
shift
|
||||
continue
|
||||
;;
|
||||
"--kernel")
|
||||
kernel="$2"
|
||||
shift
|
||||
shift
|
||||
continue
|
||||
;;
|
||||
"--rootfs")
|
||||
rootfs="$2"
|
||||
shift
|
||||
shift
|
||||
continue
|
||||
;;
|
||||
"--rootfssize")
|
||||
rootfssize="$2"
|
||||
shift
|
||||
shift
|
||||
continue
|
||||
;;
|
||||
*)
|
||||
if [ ! "$outfile" ]; then
|
||||
outfile=$1
|
||||
shift
|
||||
continue
|
||||
fi
|
||||
;;
|
||||
esac
|
||||
done
|
||||
|
||||
if [ ! -n "$board" -o ! -n "$version" -o ! -r "$kernel" -o ! -r "$rootfs" -o ! "$rootfssize" -o ! "$outfile" ]; then
|
||||
echo "syntax: $0 [--board ras-boardname] [--version ras-version] [--kernel kernelimage] [--rootfs rootfs] out"
|
||||
exit 1
|
||||
fi
|
||||
|
||||
rootfs_len=$(wc -c < "$rootfs")
|
||||
|
||||
if [ "$rootfs_len" -lt "$rootfssize" ]; then
|
||||
dd if=$rootfs of=$rootfs.new bs=$rootfssize conv=sync
|
||||
mv $rootfs.new $rootfs
|
||||
fi
|
||||
|
||||
if [ ${#version} -ge 28 ]; then
|
||||
echo "version: '$version' is too long"
|
||||
exit 1
|
||||
fi
|
||||
|
||||
tmpdir="$( mktemp -d 2> /dev/null )"
|
||||
if [ -z "$tmpdir" ]; then
|
||||
# try OSX signature
|
||||
tmpdir="$( mktemp -t 'ubitmp' -d )"
|
||||
fi
|
||||
|
||||
if [ -z "$tmpdir" ]; then
|
||||
exit 1
|
||||
fi
|
||||
|
||||
to_be() {
|
||||
local val="$1"
|
||||
local size="$2"
|
||||
|
||||
case "$size" in
|
||||
4)
|
||||
echo $(( "$val" >> 24 | ("$val" & 0xff0000) >> 8 | ("$val" & 0xff00) << 8 | ("$val" & 0xff) << 24 ))
|
||||
;;
|
||||
2)
|
||||
echo $(( "$val" >> 8 | ("$val" & 0xff) << 8))
|
||||
;;
|
||||
esac
|
||||
}
|
||||
|
||||
checksum_file() {
|
||||
local file=$1
|
||||
|
||||
# ZyXEL seems to use System V sum mode... Now this is classy, who would have thought?!
|
||||
echo $(sum -s ${file} | cut -f1 -d" ")
|
||||
}
|
||||
|
||||
append_bin() {
|
||||
local val=$1
|
||||
local size=$2
|
||||
local file=$3
|
||||
|
||||
while [ "$size" -ne 0 ]; do
|
||||
printf \\$(printf %o $(("$val" & 0xff))) >> "$file"
|
||||
val=$(($val >> 8))
|
||||
let size-=1
|
||||
done
|
||||
return
|
||||
}
|
||||
|
||||
tf=${tmpdir}/out
|
||||
pad=$(printf '%0.1s' $(printf "\xff"){1..64})
|
||||
|
||||
rootfs_header_file="$tmpdir/rootfs_header"
|
||||
rootfs_chksum=$(to_be $(checksum_file ${rootfs}) 4)
|
||||
rootfs_len=$(to_be $(wc -c < "$rootfs") 4)
|
||||
|
||||
versionpadlen=$(( 32 - ( ${#version} + 1) ))
|
||||
|
||||
# 4 bytes: checksum of the rootfs image
|
||||
append_bin "$rootfs_chksum" 4 "$rootfs_header_file"
|
||||
# 4 bytes: length of the contained rootfs image file (big endian)
|
||||
append_bin "$rootfs_len" 4 "$rootfs_header_file"
|
||||
# 32 bytes: Firmware Version string (NUL terminated, 0xff padded)
|
||||
printf "%s\x00%.*s" "$version" "$versionpadlen" "$pad" >> "$rootfs_header_file"
|
||||
|
||||
kernel_header_file="$tmpdir/kernel_header"
|
||||
kernel_chksum=$(to_be $(checksum_file ${kernel}) 4)
|
||||
kernel_len=$(to_be $(wc -c < "$kernel") 4)
|
||||
|
||||
# 4 bytes: checksum of the kernel image
|
||||
append_bin "$kernel_chksum" 4 "$kernel_header_file"
|
||||
# 4 bytes: length of the contained kernel image file (big endian)
|
||||
append_bin "$kernel_len" 4 "$kernel_header_file"
|
||||
|
||||
board_header_file="$tmpdir/board_header"
|
||||
board_file="$tmpdir/board"
|
||||
boardpadlen=$(( 64 - ( ${#board} + 1) ))
|
||||
# 32 bytes: Model (e.g. "NBG6617", NUL termiated, 0xff padded)
|
||||
printf "%s\x00%.*s" "$board" "$boardpadlen" "$pad" > "$board_file"
|
||||
cat "$kernel_header_file" >> "$board_file"
|
||||
printf "%.12s" "$pad" >> "$board_file"
|
||||
# rest: 0xff padding
|
||||
for i in {1..511}; do
|
||||
printf "%s%s" "$pad" "$pad" >> "$board_file"
|
||||
done
|
||||
|
||||
tmp_board_file="$tmpdir/tmp_board_file"
|
||||
cat "$rootfs_header_file" > "$tmp_board_file"
|
||||
|
||||
# The checksum for the header is calculated over the first 2048 bytes with
|
||||
# the rootfs image checksum as the placeholder during calculation.
|
||||
append_bin "$rootfs_chksum" 4 "$tmp_board_file"
|
||||
cat "$board_file" >> "$tmp_board_file"
|
||||
|
||||
truncate -s 2048 $tmp_board_file
|
||||
board_chksum=$(to_be $(checksum_file ${tmp_board_file}) 4)
|
||||
|
||||
# 4 bytes: checksum over the header partition (big endian)
|
||||
append_bin "$board_chksum" 4 "$board_header_file"
|
||||
cat "$board_file" >> "$board_header_file"
|
||||
|
||||
cat "$rootfs_header_file" "$board_header_file" "$rootfs" "$kernel" > "$outfile"
|
||||
|
||||
rm -rf "$tmpdir"
|
||||
Reference in New Issue
Block a user