scripts/nsdeps

   1 #!/bin/sh
   2 # SPDX-License-Identifier: GPL-2.0
   3 # Linux kernel symbol namespace import generator
   4 #
   5 # This script requires a minimum spatch version.
   6 SPATCH_REQ_VERSION="1.0.4"
   7
   8 DIR="$(dirname $(readlink -f $0))/.."
   9 SPATCH="`which ${SPATCH:=spatch}`"
  10 if [ ! -x "$SPATCH" ]; then
  11         echo 'spatch is part of the Coccinelle project and is available at http://coccinelle.lip6.fr/'
  12         exit 1
  13 fi
  14
  15 SPATCH_VERSION=$($SPATCH --version | head -1 | awk '{print $3}')
  16
  17 if ! { echo "$SPATCH_REQ_VERSION"; echo "$SPATCH_VERSION"; } | sort -CV ; then
  18         echo "spatch needs to be version $SPATCH_REQ_VERSION or higher"
  19         exit 1
  20 fi
  21
  22 if [ "$KBUILD_EXTMOD" ]; then
  23         src_prefix=
  24 else
  25         src_prefix=$srctree/
  26 fi
  27
  28 generate_deps_for_ns() {
  29         $SPATCH --very-quiet --in-place --sp-file \
  30                 $srctree/scripts/coccinelle/misc/add_namespace.cocci -D nsdeps -D ns=$1 $2
  31 }
  32
  33 generate_deps() {
  34         local mod=${1%.ko:}
  35         shift
  36         local namespaces="$*"
  37         local mod_source_files=$(sed "s|^\(.*\)\.o$|${src_prefix}\1.c|" $mod.mod)
  38
  39         for ns in $namespaces; do
  40                 echo "Adding namespace $ns to module $mod.ko."
  41                 generate_deps_for_ns $ns "$mod_source_files"
  42                 # sort the imports
  43                 for source_file in $mod_source_files; do
  44                         sed '/MODULE_IMPORT_NS/Q' $source_file > ${source_file}.tmp
  45                         offset=$(wc -l ${source_file}.tmp | awk '{print $1;}')
  46                         cat $source_file | grep MODULE_IMPORT_NS | LC_ALL=C sort -u >> ${source_file}.tmp
  47                         tail -n +$((offset +1)) ${source_file} | grep -v MODULE_IMPORT_NS >> ${source_file}.tmp
  48                         if ! diff -q ${source_file} ${source_file}.tmp; then
  49                                 mv ${source_file}.tmp ${source_file}
  50                         else
  51                                 rm ${source_file}.tmp
  52                         fi
  53                 done
  54         done
  55 }
  56
  57 while read line
  58 do
  59         generate_deps $line
  60 done < $MODULES_NSDEPS