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 in *.usyms files and the user-provided symbol whitelist. 6 7set -e 8 9# Use "make V=1" to debug this script. 10case "$KBUILD_VERBOSE" in 11*1*) 12 set -x 13 ;; 14esac 15 16read_modorder= 17 18if [ "$1" = --modorder ]; then 19 shift 20 read_modorder=1 21fi 22 23output_file="$1" 24 25needed_symbols= 26 27# Special case for modversions (see modpost.c) 28if grep -q "^CONFIG_MODVERSIONS=y$" include/config/auto.conf; then 29 needed_symbols="$needed_symbols module_layout" 30fi 31 32ksym_wl=$(sed -n 's/^CONFIG_UNUSED_KSYMS_WHITELIST=\(.*\)$/\1/p' include/config/auto.conf) 33if [ -n "$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: '$ksym_wl' whitelist file not found" >&2 37 exit 1 38 fi 39fi 40 41# Generate a new ksym list file with symbols needed by the current 42# set of modules. 43cat > "$output_file" << EOT 44/* 45 * Automatically generated file; DO NOT EDIT. 46 */ 47 48EOT 49 50{ 51 [ -n "${read_modorder}" ] && sed 's/ko$/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 56# point addresses. 57sed -e 's/^\.//' | 58sort -u | 59# Ignore __this_module. It's not an exported symbol, and will be resolved 60# when the final .ko's are linked. 61grep -v '^__this_module$' | 62sed -e 's/\(.*\)/#define __KSYM_\1 1/' >> "$output_file" 63