scripts/strip-kmod.sh

   1 #!/usr/bin/env bash
   2 [ -n "$CROSS" ] || {
   3         echo "The variable CROSS must be set to point to the cross-compiler prefix"
   4         exit 1
   5 }
   6
   7 MODULE="$1"
   8
   9 [ "$#" -ne 1 ] && {
  10         echo "Usage: $0 <module>"
  11         exit 1
  12 }
  13
  14 ARGS=
  15 if [ -n "$KEEP_SYMBOLS" ]; then
  16         ARGS="-X --strip-debug"
  17 else
  18         ARGS="-x -G __this_module --strip-unneeded"
  19 fi
  20
  21 ${CROSS}objcopy \
  22         -R .comment \
  23         -R .pdr \
  24         -R .mdebug.abi32 \
  25         -R .note.gnu.build-id \
  26         -R .gnu.attributes \
  27         -R .reginfo \
  28         $ARGS \
  29         "$MODULE" "$MODULE.tmp"
  30
  31 [ -n "$NO_RENAME" ] && {
  32         mv "${MODULE}.tmp" "$MODULE"
  33         exit 0
  34 }
  35
  36 ${CROSS}nm "$MODULE.tmp" | awk '
  37 BEGIN {
  38         n = 0
  39 }
  40
  41 $3 && $2 ~ /[brtd]/ && $3 !~ /\$LC/ && !def[$3] {
  42         print "--redefine-sym "$3"=_"n;
  43         n = n + 1
  44         def[$3] = 1
  45 }
  46 ' > "$MODULE.tmp1"
  47
  48 ${CROSS}objcopy `cat ${MODULE}.tmp1` ${MODULE}.tmp ${MODULE}.out
  49 mv "${MODULE}.out" "${MODULE}"
  50 rm -f "${MODULE}".t*