kernel-srpm-macros/find-provides.ksyms
Eugene Syromiatnikov 24312e21be find-provides.ksyms, find-requires.ksyms: work around printed __crc_* type change
Commit binutils-2_33~1385[1] has changed (and binutils-2_35~1768[2]
has not reverted) the calculated type for symbols in read-write .rodata section
from 'R' to 'D' on architectures where CONFIG_MODULE_REL_CRCS is enabled
(namely, ppc64* and s390*), since, apparently, many kernel modules have it indeed
read-write.  Work around it by matching both D and R as possible __crc_* symbol
type.

[1] https://sourceware.org/git/?p=binutils-gdb.git;a=commitdiff;h=a288c270991d
[2] https://sourceware.org/git/?p=binutils-gdb.git;a=commitdiff;h=49d9fd42acef

* find-provides.ksyms: Match D as possible __crc_* symbol type in
addition to R.
* find-requires.ksyms: Likewise.
* kernel-srpm-macros.spec (Release): Bump to 11%{?dist}.
(%changelog): Mention the change.

Resolves: #2055464
Signed-off-by: Eugene Syromiatnikov <esyr@redhat.com>
2022-02-17 04:41:45 +01:00

64 lines
2.2 KiB
Bash
Executable File

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