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#! /bin/bash
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IFS=$'\n'
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# Extract all of the symbols provided by this module.
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all_provides() {
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if [[ -n $(nm "$@" | sed -r -ne 's:^0*([0-9a-f]+) A __crc_(.+):0x\1 \2:p') ]]; then
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nm "$@" \
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| sed -r -ne 's:^0*([0-9a-f]+) A __crc_(.+):0x\1 \2:p' \
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| awk --non-decimal-data '{printf("0x%08x\t%s\n", $1, $2)}' \
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| LC_ALL=C sort -k2,2 -u
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else
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ELFRODATA=$(readelf -R .rodata "$@" | awk '/0x/{printf $2$3$4$5}')
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if [[ -n $(readelf -h "$@" | grep "little endian") ]]; then
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RODATA=$(echo $ELFRODATA | sed 's/\(..\)\(..\)\(..\)\(..\)/\4\3\2\1/g')
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else
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RODATA=$ELFRODATA
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fi
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for sym in $(nm "$@" | sed -r -ne 's:^0*([0-9a-f]+) R __crc_(.+):0x\1 \2:p'); do
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echo $sym $RODATA
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done \
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| awk --non-decimal-data '{printf("0x%08s\t%s\n", substr($3,($1*2)+1,8), $2)}' \
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| LC_ALL=C sort -k2,2 -u
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fi
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}
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# Extract all of the requirements of this module.
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all_requires() {
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for module in "$@"; do
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set -- $(/sbin/modinfo -F vermagic "$module" | sed -e 's: .*::' -e q)
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/sbin/modprobe --dump-modversions "$module" \
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| awk --non-decimal-data '
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BEGIN { FS = "\t" ; OFS = "\t" }
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{printf("0x%08x\t%s\n", $1, $2)}' \
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| sed -r -e 's:$:\t'"$1"':'
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done \
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| LC_ALL=C sort -k2,2 -u
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}
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# Filter out requirements fulfilled by the module itself.
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mod_requires() {
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LC_ALL=C join -t $'\t' -j 2 -v 1 \
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<(all_requires "$@") \
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<(all_provides "$@") \
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| LC_ALL=C sort -k1,1 -u
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}
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if ! [ -e /sbin/modinfo -a -e /sbin/modprobe ]; then
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cat > /dev/null
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exit 0
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fi
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modules=($(grep -E '/lib/modules/.+\.ko$'))
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if [ ${#modules[@]} -gt 0 ]; then
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kernel=$(/sbin/modinfo -F vermagic "${modules[0]}" | sed -e 's: .*::' -e q)
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# get all that kernel provides
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symvers=$(mktemp -t ${0##*/}.XXXXX)
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cat /usr/src/kernels/$kernel/Module.symvers | awk '
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BEGIN { FS = "\t" ; OFS = "\t" }
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{ print $2 "\t" $1 }
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' \
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| sed -r -e 's:$:\t'"$kernel"':' \
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| LC_ALL=C sort -k1,1 -u > $symvers
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# Symbols matching with the kernel get a "kernel" dependency
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LC_ALL=C join -t $'\t' -j 1 $symvers <(mod_requires "${modules[@]}") | LC_ALL=C sort -u \
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| awk '{ FS = "\t" ; OFS = "\t" } { print "kernel(" $1 ") = " $2 }'
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# Symbols from elsewhere get a "ksym" dependency
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LC_ALL=C join -t $'\t' -j 1 -v 2 $symvers <(mod_requires "${modules[@]}") | LC_ALL=C sort -u \
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| awk '{ FS = "\t" ; OFS = "\t" } { print "ksym(" $1 ") = " $2 }'
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fi
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