#!/bin/sh # Script to create/update include/generated/autoksyms.h and dependency files # # Copyright: (C) 2016 Linaro Limited # Created by: Nicolas Pitre, January 2016 # # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License version 2 as # published by the Free Software Foundation. # Create/update the include/generated/autoksyms.h file from the list # of all module's needed symbols as recorded on the third line of # .tmp_versions/*.mod files. # # For each symbol being added or removed, the corresponding dependency # file's timestamp is updated to force a rebuild of the affected source # file. All arguments passed to this script are assumed to be a command # to be exec'd to trigger a rebuild of those files. set -e cur_ksyms_file="include/generated/autoksyms.h" new_ksyms_file="include/generated/autoksyms.h.tmpnew" info() { if [ "$quiet" != "silent_" ]; then printf " %-7s %s\n" "$1" "$2" fi } info "CHK" "$cur_ksyms_file" # Use "make V=1" to debug this script. case "$KBUILD_VERBOSE" in *1*) set -x ;; esac # We need access to CONFIG_ symbols case "${KCONFIG_CONFIG}" in */*) . "${KCONFIG_CONFIG}" ;; *) # Force using a file from the current directory . "./${KCONFIG_CONFIG}" esac # In case it doesn't exist yet... if [ -e "$cur_ksyms_file" ]; then touch "$cur_ksyms_file"; fi # Generate a new ksym list file with symbols needed by the current # set of modules. cat > "$new_ksyms_file" << EOT /* * Automatically generated file; DO NOT EDIT. */ EOT sed -ns -e '3{s/ /\n/g;/^$/!p;}' "$MODVERDIR"/*.mod | sort -u | while read sym; do if [ -n "$CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX" ]; then sym="${sym#_}" fi echo "#define __KSYM_${sym} 1" done >> "$new_ksyms_file" # Special case for modversions (see modpost.c) if [ -n "$CONFIG_MODVERSIONS" ]; then echo "#define __KSYM_module_layout 1" >> "$new_ksyms_file" fi # Extract changes between old and new list and touch corresponding # dependency files. changed=$( count=0 sort "$cur_ksyms_file" "$new_ksyms_file" | uniq -u | sed -n 's/^#define __KSYM_\(.*\) 1/\1/p' | tr "A-Z_" "a-z/" | while read sympath; do if [ -z "$sympath" ]; then continue; fi depfile="include/config/ksym/${sympath}.h" mkdir -p "$(dirname "$depfile")" touch "$depfile" echo $((count += 1)) done | tail -1 ) changed=${changed:-0} if [ $changed -gt 0 ]; then # Replace the old list with tne new one old=$(grep -c "^#define __KSYM_" "$cur_ksyms_file" || true) new=$(grep -c "^#define __KSYM_" "$new_ksyms_file" || true) info "KSYMS" "symbols: before=$old, after=$new, changed=$changed" info "UPD" "$cur_ksyms_file" mv -f "$new_ksyms_file" "$cur_ksyms_file" # Then trigger a rebuild of affected source files exec $@ else rm -f "$new_ksyms_file" fi