From 32a69747812d72bb93bd3a71090d5db58b9a5602 Mon Sep 17 00:00:00 2001 From: Felix Fietkau Date: Mon, 20 Feb 2012 17:38:26 +0000 Subject: strip kernel modules more aggressively: make all global symbols local, rename all symbols in the symbol table to make them compress better git-svn-id: svn://svn.openwrt.org/openwrt/trunk@30662 3c298f89-4303-0410-b956-a3cf2f4a3e73 --- scripts/strip-kmod.sh | 38 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) create mode 100755 scripts/strip-kmod.sh (limited to 'scripts/strip-kmod.sh') 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: $0 " + exit 1 +} + +${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* -- cgit v1.2.3