1#!/bin/sh 2# SPDX-License-Identifier: GPL-2.0-only 3 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 6# whitelist. 7 8set -e 9 10output_file="$1" 11 12# Use "make V=1" to debug this script. 13case "$KBUILD_VERBOSE" in 14*1*) 15 set -x 16 ;; 17esac 18 19# We need access to CONFIG_ symbols 20. include/config/auto.conf 21 22needed_symbols= 23 24# Special case for modversions (see modpost.c) 25if [ -n "$CONFIG_MODVERSIONS" ]; then 26 needed_symbols="$needed_symbols module_layout" 27fi 28 29ksym_wl= 30if [ -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: '$ksym_wl' whitelist file not found" >&2 36 exit 1 37 fi 38fi 39 40# Generate a new ksym list file with symbols needed by the current 41# set of modules. 42cat > "$output_file" << EOT 43/* 44 * Automatically generated file; DO NOT EDIT. 45 */ 46 47EOT 48 49[ -f modules.order ] && modlist=modules.order || modlist=/dev/null 50 51{ 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 57# point addresses. 58sed -e 's/^\.//' | 59sort -u | 60sed -e 's/\(.*\)/#define __KSYM_\1 1/' >> "$output_file" 61