the-tree/scripts/gen_autoksyms.sh

0001 #!/bin/sh
0002 # SPDX-License-Identifier: GPL-2.0-only
0003
0004 # Create an autoksyms.h header file from the list of all module's needed symbols
0005 # as recorded in *.usyms files and the user-provided symbol whitelist.
0006
0007 set -e
0008
0009 # Use "make V=1" to debug this script.
0010 case "$KBUILD_VERBOSE" in
0011 *1*)
0012         set -x
0013         ;;
0014 esac
0015
0016 read_modorder=
0017
0018 if [ "$1" = --modorder ]; then
0019         shift
0020         read_modorder=1
0021 fi
0022
0023 output_file="$1"
0024
0025 needed_symbols=
0026
0027 # Special case for modversions (see modpost.c)
0028 if grep -q "^CONFIG_MODVERSIONS=y$" include/config/auto.conf; then
0029         needed_symbols="$needed_symbols module_layout"
0030 fi
0031
0032 ksym_wl=$(sed -n 's/^CONFIG_UNUSED_KSYMS_WHITELIST=\(.*\)$/\1/p' include/config/auto.conf)
0033 if [ -n "$ksym_wl" ]; then
0034         [ "${ksym_wl}" != "${ksym_wl#/}" ] || ksym_wl="$abs_srctree/$ksym_wl"
0035         if [ ! -f "$ksym_wl" ] || [ ! -r "$ksym_wl" ]; then
0036                 echo "ERROR: '$ksym_wl' whitelist file not found" >&2
0037                 exit 1
0038         fi
0039 fi
0040
0041 # Generate a new ksym list file with symbols needed by the current
0042 # set of modules.
0043 cat > "$output_file" << EOT
0044 /*
0045  * Automatically generated file; DO NOT EDIT.
0046  */
0047
0048 EOT
0049
0050 {
0051         [ -n "${read_modorder}" ] && sed 's/ko$/usyms/' modules.order | xargs cat
0052         echo "$needed_symbols"
0053         [ -n "$ksym_wl" ] && cat "$ksym_wl"
0054 } | sed -e 's/ /\n/g' | sed -n -e '/^$/!p' |
0055 # Remove the dot prefix for ppc64; symbol names with a dot (.) hold entry
0056 # point addresses.
0057 sed -e 's/^\.//' |
0058 sort -u |
0059 # Ignore __this_module. It's not an exported symbol, and will be resolved
0060 # when the final .ko's are linked.
0061 grep -v '^__this_module$' |
0062 sed -e 's/\(.*\)/#define __KSYM_\1 1/' >> "$output_file"