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 in *.usyms files and the user-provided symbol whitelist.
9 # Use "make V=1" to debug this script.
10 case "$KBUILD_VERBOSE" in
18 if [ "$1" = --modorder ]; then
27 # Special case for modversions (see modpost.c)
28 if grep -q "^CONFIG_MODVERSIONS=y$" include/config/auto.conf; then
29 needed_symbols="$needed_symbols module_layout"
32 ksym_wl=$(sed -n 's/^CONFIG_UNUSED_KSYMS_WHITELIST=\(.*\)$/\1/p' include/config/auto.conf)
33 if [ -n "$ksym_wl" ]; then
34 [ "${ksym_wl}" != "${ksym_wl#/}" ] || ksym_wl="$abs_srctree/$ksym_wl"
35 if [ ! -f "$ksym_wl" ] || [ ! -r "$ksym_wl" ]; then
36 echo "ERROR: '$ksym_wl' whitelist file not found" >&2
41 # Generate a new ksym list file with symbols needed by the current
43 cat > "$output_file" << EOT
45 * Automatically generated file; DO NOT EDIT.
51 [ -n "${read_modorder}" ] && sed 's/o$/usyms/' modules.order | xargs cat
52 echo "$needed_symbols"
53 [ -n "$ksym_wl" ] && cat "$ksym_wl"
54 } | sed -e 's/ /\n/g' | sed -n -e '/^$/!p' |
55 # Remove the dot prefix for ppc64; symbol names with a dot (.) hold entry
59 # Ignore __this_module. It's not an exported symbol, and will be resolved
60 # when the final .ko's are linked.
61 grep -v '^__this_module$' |
62 sed -e 's/\(.*\)/#define __KSYM_\1 1/' >> "$output_file"