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64 lines
2.2 KiB
64 lines
2.2 KiB
3 years ago
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#! /bin/bash
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IFS=$'\n'
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for module in $(grep -E '/lib/modules/.+\.ko(\.gz|\.bz2|\.xz|\.zst)?$') "$@"; do
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dep_pfx="ksym"
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# For built-in kmods, "kernel()" syntax is used instead of "ksym()"
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printf "%s" "$module" | grep -v "^${RPM_BUILD_ROOT}/\?lib/modules/[1-9][^/]*/kernel" > /dev/null \
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|| dep_pfx="kernel"
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tmpfile=""
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if [ "x${module%.ko}" = "x${module}" ]; then
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tmpfile=$(mktemp -t ${0##*/}.XXXXXX.ko)
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proc_bin=
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case "${module##*.}" in
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zst)
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proc_bin=zstd
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;;
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xz)
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proc_bin=xz
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;;
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bz2)
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proc_bin=bzip2
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;;
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gz)
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proc_bin=gzip
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;;
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esac
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[ -n "$proc_bin" ] || continue
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"$proc_bin" -d -c - < "$module" > "$tmpfile" || continue
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module="$tmpfile"
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fi
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if [[ -n $(nm $module | sed -r -ne 's:^0*([0-9a-f]+) A __crc_(.+):0x\1 \2:p') ]]; then
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nm $module \
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| sed -r -ne 's:^0*([0-9a-f]+) A __crc_(.+):0x\1 \2:p' \
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| awk --non-decimal-data '{printf("'"${dep_pfx}"'(%s) = 0x%08x\n", $2, $1)}' \
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| LC_ALL=C sort -u
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else
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ELFRODATA=$(readelf -R .rodata $module | awk '/0x/{printf $2$3$4$5}')
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if [[ -n $(readelf -h $module | grep "little endian") ]]; then
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RODATA=$(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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# Commit binutils-2_33~1385[1] has changed (and binutils-2_35~1768[2]
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# has not reverted it) the calculated type for symbols in read-write
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# .rodata section from 'R' to 'D', since, apparently, many kernel
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# modules have it indeed read-write.
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#
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# [1] https://sourceware.org/git/?p=binutils-gdb.git;a=commitdiff;h=a288c270991d
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# [2] https://sourceware.org/git/?p=binutils-gdb.git;a=commitdiff;h=49d9fd42acef
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for sym in $(nm $module | sed -r -ne 's:^0*([0-9a-f]+) [DR] __crc_(.+):0x\1 \2:p'); do
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echo $sym $RODATA
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done \
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| awk --non-decimal-data '{printf("'"${dep_pfx}"'(%s) = 0x%08s\n", $2, substr($3,($1*2)+1,8))}' \
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| LC_ALL=C sort -u
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fi
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[ -z "$tmpfile" ] || rm -f -- "$tmpfile"
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done
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