99 lines
2.8 KiB
Bash
Executable File
99 lines
2.8 KiB
Bash
Executable File
#!/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 "$KBUILD_VERBOSE" in
|
|
*1*)
|
|
set -x
|
|
;;
|
|
esac
|
|
|
|
# We need access to CONFIG_ symbols
|
|
. include/config/auto.conf
|
|
|
|
# Generate a new ksym list file with symbols needed by the current
|
|
# set of modules.
|
|
cat > "$new_ksyms_file" << EOT
|
|
/*
|
|
* Automatically generated file; DO NOT EDIT.
|
|
*/
|
|
|
|
EOT
|
|
[ "$(ls -A "$MODVERDIR")" ] &&
|
|
for mod in "$MODVERDIR"/*.mod; do
|
|
sed -n -e '3{s/ /\n/g;/^$/!p;}' "$mod"
|
|
done | sort -u |
|
|
while read sym; do
|
|
echo "#define __KSYM_${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 "$sympath" ]; then continue; fi
|
|
depfile="include/ksym/${sympath}.h"
|
|
mkdir -p "$(dirname "$depfile")"
|
|
touch "$depfile"
|
|
# Filesystems with coarse time precision may create timestamps
|
|
# equal to the one from a file that was very recently built and that
|
|
# needs to be rebuild. Let's guard against that by making sure our
|
|
# dep files are always newer than the first file we created here.
|
|
while [ ! "$depfile" -nt "$new_ksyms_file" ]; do
|
|
touch "$depfile"
|
|
done
|
|
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
|