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author | Felix Fietkau <nbd@openwrt.org> | 2012-02-20 17:38:26 +0000 |
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committer | Felix Fietkau <nbd@openwrt.org> | 2012-02-20 17:38:26 +0000 |
commit | c2590fe9309910c759a9b8a5dbcd7facffe8d982 (patch) | |
tree | 3881176f1a6717e8a9fe10f2fea2b9335dd004ca /scripts/strip-kmod.sh | |
parent | c9188104140685f3d13c789f2823dbad5b3ac0f1 (diff) | |
download | openwrt-c2590fe9309910c759a9b8a5dbcd7facffe8d982.tar.gz openwrt-c2590fe9309910c759a9b8a5dbcd7facffe8d982.tar.bz2 openwrt-c2590fe9309910c759a9b8a5dbcd7facffe8d982.zip |
strip kernel modules more aggressively: make all global symbols local, rename all symbols in the symbol table to make them compress better
SVN-Revision: 30662
Diffstat (limited to 'scripts/strip-kmod.sh')
-rwxr-xr-x | scripts/strip-kmod.sh | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/scripts/strip-kmod.sh b/scripts/strip-kmod.sh new file mode 100755 index 0000000000..68da9e901b --- /dev/null +++ b/scripts/strip-kmod.sh @@ -0,0 +1,38 @@ +#!/usr/bin/env bash +[ -n "$CROSS" ] || { + echo "The variable CROSS must be set to point to the cross-compiler prefix" + exit 1 +} + +MODULE="$1" + +[ "$#" -ne 1 ] && { + echo "Usage: $0 <module>" + exit 1 +} + +${CROSS}objcopy \ + --strip-unneeded \ + -R .comment \ + -R .pdr \ + -R .mdebug.abi32 \ + -R .note.gnu.build-id \ + -R .gnu.attributes \ + -R .reginfo \ + -G __this_module \ + -x "$MODULE" "$MODULE.tmp" + +${CROSS}nm "$MODULE.tmp" | awk ' +BEGIN { + n = 0 +} + +$3 && $2 ~ /[brtd]/ && $3 !~ /\$LC/ { + print "--redefine-sym "$3"=_"n; + n = n + 1 +} +' > "$MODULE.tmp1" + +${CROSS}objcopy `cat ${MODULE}.tmp1` ${MODULE}.tmp ${MODULE}.out +mv "${MODULE}.out" "${MODULE}" +rm -f "${MODULE}".t* |