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 if [ -z "$KEEP_BUILD_ID" ]; then
  22     ARGS="$ARGS -R .note.gnu.build-id"
  23 fi
  24
  25 ${CROSS}objcopy \
  26         -R .comment \
  27         -R .pdr \
  28         -R .mdebug.abi32 \
  29         -R .gnu.attributes \
  30         -R .reginfo \
  31         $ARGS \
  32         "$MODULE" "$MODULE.tmp"
  33
  34 [ -n "$NO_RENAME" ] && {
  35         mv "${MODULE}.tmp" "$MODULE"
  36         exit 0
  37 }
  38
  39 ${CROSS}nm "$MODULE.tmp" | awk '
  40 BEGIN {
  41         n = 0
  42 }
  43
  44 $3 && $2 ~ /[brtd]/ && $3 !~ /\$LC/ && !def[$3] {
  45         print "--redefine-sym "$3"=_"n;
  46         n = n + 1
  47         def[$3] = 1
  48 }
  49 ' > "$MODULE.tmp1"
  50
  51 ${CROSS}objcopy `cat ${MODULE}.tmp1` ${MODULE}.tmp ${MODULE}.out
  52 mv "${MODULE}.out" "${MODULE}"
  53 rm -f "${MODULE}".t*