projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 23121ca2 | 1 | #!/bin/sh |
| d2912cb1 | 2 | # SPDX-License-Identifier: GPL-2.0-only |
| 23121ca2 | 3 | |
| cd195bc4 | 4 | # Script to update include/generated/autoksyms.h and dependency files |
| 23121ca2 NP |
5 | # |
| 6 | # Copyright: (C) 2016 Linaro Limited | |
| 7 | # Created by: Nicolas Pitre, January 2016 | |
| 8 | # | |
| 23121ca2 | 9 | |
| cd195bc4 | 10 | # Update the include/generated/autoksyms.h file. |
| 23121ca2 NP |
11 | # |
| 12 | # For each symbol being added or removed, the corresponding dependency | |
| 13 | # file's timestamp is updated to force a rebuild of the affected source | |
| 14 | # file. All arguments passed to this script are assumed to be a command | |
| 15 | # to be exec'd to trigger a rebuild of those files. | |
| 16 | ||
| 17 | set -e | |
| 18 | ||
| 19 | cur_ksyms_file="include/generated/autoksyms.h" | |
| 20 | new_ksyms_file="include/generated/autoksyms.h.tmpnew" | |
| 21 | ||
| 22 | info() { | |
| 23 | if [ "$quiet" != "silent_" ]; then | |
| 24 | printf " %-7s %s\n" "$1" "$2" | |
| 25 | fi | |
| 26 | } | |
| 27 | ||
| 28 | info "CHK" "$cur_ksyms_file" | |
| 29 | ||
| 30 | # Use "make V=1" to debug this script. | |
| 31 | case "$KBUILD_VERBOSE" in | |
| 32 | *1*) | |
| 33 | set -x | |
| 34 | ;; | |
| 35 | esac | |
| 36 | ||
| 37 | # We need access to CONFIG_ symbols | |
| 94cf8acc | 38 | . include/config/auto.conf |
| 23121ca2 | 39 | |
| cd195bc4 QP |
40 | # Generate a new symbol list file |
| 41 | $CONFIG_SHELL $srctree/scripts/gen_autoksyms.sh "$new_ksyms_file" | |
| 23121ca2 NP |
42 | |
| 43 | # Extract changes between old and new list and touch corresponding | |
| 44 | # dependency files. | |
| 45 | changed=$( | |
| 46 | count=0 | |
| 47 | sort "$cur_ksyms_file" "$new_ksyms_file" | uniq -u | | |
| 48 | sed -n 's/^#define __KSYM_\(.*\) 1/\1/p' | tr "A-Z_" "a-z/" | | |
| 49 | while read sympath; do | |
| 50 | if [ -z "$sympath" ]; then continue; fi | |
| fbfa9be9 | 51 | depfile="include/ksym/${sympath}.h" |
| 23121ca2 NP |
52 | mkdir -p "$(dirname "$depfile")" |
| 53 | touch "$depfile" | |
| 825d4875 NP |
54 | # Filesystems with coarse time precision may create timestamps |
| 55 | # equal to the one from a file that was very recently built and that | |
| 56 | # needs to be rebuild. Let's guard against that by making sure our | |
| 57 | # dep files are always newer than the first file we created here. | |
| 58 | while [ ! "$depfile" -nt "$new_ksyms_file" ]; do | |
| 59 | touch "$depfile" | |
| 60 | done | |
| 23121ca2 NP |
61 | echo $((count += 1)) |
| 62 | done | tail -1 ) | |
| 63 | changed=${changed:-0} | |
| 64 | ||
| 65 | if [ $changed -gt 0 ]; then | |
| 66 | # Replace the old list with tne new one | |
| 67 | old=$(grep -c "^#define __KSYM_" "$cur_ksyms_file" || true) | |
| 68 | new=$(grep -c "^#define __KSYM_" "$new_ksyms_file" || true) | |
| 69 | info "KSYMS" "symbols: before=$old, after=$new, changed=$changed" | |
| 70 | info "UPD" "$cur_ksyms_file" | |
| 71 | mv -f "$new_ksyms_file" "$cur_ksyms_file" | |
| 72 | # Then trigger a rebuild of affected source files | |
| 73 | exec $@ | |
| 74 | else | |
| 75 | rm -f "$new_ksyms_file" | |
| 76 | fi |