2 # SPDX-License-Identifier: GPL-2.0-only
4 # Create an autoksyms.h header file from the list of all module's needed symbols
5 # as recorded on the second line of *.mod files and the user-provided symbol
12 # Use "make V=1" to debug this script.
13 case "$KBUILD_VERBOSE" in
19 # We need access to CONFIG_ symbols
20 . include/config/auto.conf
24 # Special case for modversions (see modpost.c)
25 if [ -n "$CONFIG_MODVERSIONS" ]; then
26 needed_symbols="$needed_symbols module_layout"
30 if [ -n "$CONFIG_UNUSED_KSYMS_WHITELIST" ]; then
31 # Use 'eval' to expand the whitelist path and check if it is relative
32 eval ksym_wl="$CONFIG_UNUSED_KSYMS_WHITELIST"
33 [ "${ksym_wl}" != "${ksym_wl#/}" ] || ksym_wl="$abs_srctree/$ksym_wl"
34 if [ ! -f "$ksym_wl" ] || [ ! -r "$ksym_wl" ]; then
35 echo "ERROR: '$ksym_wl' whitelist file not found" >&2
40 # Generate a new ksym list file with symbols needed by the current
42 cat > "$output_file" << EOT
44 * Automatically generated file; DO NOT EDIT.
49 [ -f modules.order ] && modlist=modules.order || modlist=/dev/null
52 sed 's/ko$/mod/' $modlist | xargs -n1 sed -n -e '2p'
53 echo "$needed_symbols"
54 [ -n "$ksym_wl" ] && cat "$ksym_wl"
55 } | sed -e 's/ /\n/g' | sed -n -e '/^$/!p' |
56 # Remove the dot prefix for ppc64; symbol names with a dot (.) hold entry
60 sed -e 's/\(.*\)/#define __KSYM_\1 1/' >> "$output_file"