fd79794323
Linux commit v5.19-rc1~139^2~2 ("kbuild: link symbol CRCs at final link,
removing CONFIG_MODULE_REL_CRCS") has broken the assumption aobut
the placement of non-absolute CRC symbols in .rodata (and also affects
the architectures that used to have these symbols as absolute); rewrite
the parsing by utilising "objdump -t" output to figure out
the section(s) where the __crc_* symbols are stored and process
it instead of the hard-coded ".rodata" section. The change also speeds
up the processing a bit, around 33% on synthetic tests:
$ time sh -c 'find ./lib/modules/5.14.0-258.el9.ppc64le -name "*.ko.xz" | find-provides.ksyms.old > /dev/null 2> /dev/null'
sh -c 10.36s user 5.58s system 137% cpu 11.613 total
$ time sh -c 'find ./lib/modules/5.14.0-258.el9.ppc64le -name "*.ko.xz" | find-provides.ksyms.new > /dev/null 2> /dev/null'
sh -c 7.82s user 4.59s system 142% cpu 8.686 total
$ time sh -c 'find ./lib/modules/5.14.0-258.el9.ppc64le -name "*.ko.xz" -exec sh -c "echo {} | find-provides.ksyms.old" \; > /dev/null 2> /dev/null'
sh -c 11.85s user 6.76s system 129% cpu 14.318 total
$ time sh -c 'find ./lib/modules/5.14.0-258.el9.ppc64le -name "*.ko.xz" -exec sh -c "echo {} | find-provides.ksyms.new" \; > /dev/null 2> /dev/null'
sh -c 8.91s user 5.51s system 135% cpu 10.647 total
* find-provides.ksyms: Process "objdump -t" output to get the list
of sections where __crc_* symbol contents are placed; retrieve
each one with "readelf -R" and supply it to an awk script that cuts
the required part of it for each __crc_* symbol in that section.
* find-requires.ksyms (all_provides): Likewise.
Signed-off-by: Eugene Syromiatnikov <esyr@redhat.com>
Resolves: #2135047
|
||
|---|---|---|
| .gitignore | ||
| README.md | ||
| brp-kmod-restore-perms | ||
| brp-kmod-set-exec-bit | ||
| find-provides.ksyms | ||
| find-requires.ksyms | ||
| firmware.prov | ||
| gating.yaml | ||
| kabi.attr | ||
| kabi.sh | ||
| kernel-srpm-macros.spec | ||
| kmod.attr | ||
| kmodtool | ||
| macros.kernel-srpm | ||
| macros.kmp | ||
| modalias.attr | ||
| modalias.prov | ||
| provided_ksyms.attr | ||
| required_ksyms.attr | ||
| rpmsort | ||
| sources | ||
| symset-table | ||
README.md
kernel-srpm-macros
The kernel-srpm-macros package