scripts/gen_autoksyms.sh

   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
   8 set -e
   9
  10 output_file="$1"
  11
  12 # Use "make V=1" to debug this script.
  13 case "$KBUILD_VERBOSE" in
  14 *1*)
  15         set -x
  16         ;;
  17 esac
  18
  19 # We need access to CONFIG_ symbols
  20 . include/config/auto.conf
  21
  22 ksym_wl=/dev/null
  23 if [ -n "$CONFIG_UNUSED_KSYMS_WHITELIST" ]; then
  24         # Use 'eval' to expand the whitelist path and check if it is relative
  25         eval ksym_wl="$CONFIG_UNUSED_KSYMS_WHITELIST"
  26         [ "${ksym_wl}" != "${ksym_wl#/}" ] || ksym_wl="$abs_srctree/$ksym_wl"
  27         if [ ! -f "$ksym_wl" ] || [ ! -r "$ksym_wl" ]; then
  28                 echo "ERROR: '$ksym_wl' whitelist file not found" >&2
  29                 exit 1
  30         fi
  31 fi
  32
  33 # Generate a new ksym list file with symbols needed by the current
  34 # set of modules.
  35 cat > "$output_file" << EOT
  36 /*
  37  * Automatically generated file; DO NOT EDIT.
  38  */
  39
  40 EOT
  41
  42 [ -f modules.order ] && modlist=modules.order || modlist=/dev/null
  43 sed 's/ko$/mod/' $modlist |
  44 xargs -n1 sed -n -e '2{s/ /\n/g;/^$/!p;}' -- |
  45 cat - "$ksym_wl" |
  46 sort -u |
  47 sed -e 's/\(.*\)/#define __KSYM_\1 1/' >> "$output_file"
  48
  49 # Special case for modversions (see modpost.c)
  50 if [ -n "$CONFIG_MODVERSIONS" ]; then
  51         echo "#define __KSYM_module_layout 1" >> "$output_file"
  52 fi