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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
commit | ace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch) | |
tree | b2d64bc10158fdd5497876388cd68142ca374ed3 /arch/arm/boot/deflate_xip_data.sh | |
parent | Initial commit. (diff) | |
download | linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip |
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/arm/boot/deflate_xip_data.sh')
-rwxr-xr-x | arch/arm/boot/deflate_xip_data.sh | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/arch/arm/boot/deflate_xip_data.sh b/arch/arm/boot/deflate_xip_data.sh new file mode 100755 index 0000000000..304495c3c2 --- /dev/null +++ b/arch/arm/boot/deflate_xip_data.sh @@ -0,0 +1,62 @@ +#!/bin/sh +# SPDX-License-Identifier: GPL-2.0-only + +# XIP kernel .data segment compressor +# +# Created by: Nicolas Pitre, August 2017 +# Copyright: (C) 2017 Linaro Limited +# + +# This script locates the start of the .data section in xipImage and +# substitutes it with a compressed version. The needed offsets are obtained +# from symbol addresses in vmlinux. It is expected that .data extends to +# the end of xipImage. + +set -e + +VMLINUX="$1" +XIPIMAGE="$2" + +DD="dd status=none" + +# Use "make V=1" to debug this script. +case "$KBUILD_VERBOSE" in +*1*) + set -x + ;; +esac + +sym_val() { + # extract hex value for symbol in $1 + local val=$($NM "$VMLINUX" 2>/dev/null | sed -n "/ $1\$/{s/ .*$//p;q}") + [ "$val" ] || { echo "can't find $1 in $VMLINUX" 1>&2; exit 1; } + # convert from hex to decimal + echo $((0x$val)) +} + +__data_loc=$(sym_val __data_loc) +_edata_loc=$(sym_val _edata_loc) +base_offset=$(sym_val _xiprom) + +# convert to file based offsets +data_start=$(($__data_loc - $base_offset)) +data_end=$(($_edata_loc - $base_offset)) + +# Make sure data occupies the last part of the file. +file_end=$(${CONFIG_SHELL} "${srctree}/scripts/file-size.sh" "$XIPIMAGE") +if [ "$file_end" != "$data_end" ]; then + printf "end of xipImage doesn't match with _edata_loc (%#x vs %#x)\n" \ + $(($file_end + $base_offset)) $_edata_loc 1>&2 + exit 1; +fi + +# be ready to clean up +trap 'rm -f "$XIPIMAGE.tmp"; exit 1' 1 2 3 + +# substitute the data section by a compressed version +$DD if="$XIPIMAGE" count=$data_start iflag=count_bytes of="$XIPIMAGE.tmp" +$DD if="$XIPIMAGE" skip=$data_start iflag=skip_bytes | +$KGZIP -9 >> "$XIPIMAGE.tmp" + +# replace kernel binary +mv -f "$XIPIMAGE.tmp" "$XIPIMAGE" |