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| author | Josh Poimboeuf <jpoimboe@kernel.org> | 2026-01-27 17:12:05 -0800 |
|---|---|---|
| committer | Josh Poimboeuf <jpoimboe@kernel.org> | 2026-01-29 10:09:26 -0800 |
| commit | a8ff29f0ca1d63a215ef445102662850a912d127 (patch) | |
| tree | c7fb03adcb7dca6b0cb7da73e14553aa78dde877 /scripts | |
| parent | 78c268f3781e4b9706103def0cc011505e0c4332 (diff) | |
livepatch/klp-build: Require Clang assembler >= 20
Some special sections specify their ELF section entsize, for example:
.pushsection section, "M", @progbits, 8
The entsize (8 in this example) is needed by objtool klp-diff for
extracting individual entries.
Clang assembler versions older than 20 silently ignore the above
construct and set entsize to 0, resulting in the following error:
.discard.annotate_data: missing special section entsize or annotations
Add a klp-build check to prevent the use of Clang assembler versions
prior to 20.
Fixes: 24ebfcd65a87 ("livepatch/klp-build: Introduce klp-build script for generating livepatch modules")
Reported-by: Song Liu <song@kernel.org>
Acked-by: Song Liu <song@kernel.org>
Link: https://patch.msgid.link/957fd52e375d0e2cfa3ac729160da995084a7f5e.1769562556.git.jpoimboe@kernel.org
Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
Diffstat (limited to 'scripts')
| -rwxr-xr-x | scripts/livepatch/klp-build | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/scripts/livepatch/klp-build b/scripts/livepatch/klp-build index a73515a82272..809e198a561d 100755 --- a/scripts/livepatch/klp-build +++ b/scripts/livepatch/klp-build @@ -249,6 +249,10 @@ validate_config() { [[ -v CONFIG_GCC_PLUGIN_RANDSTRUCT ]] && \ die "kernel option 'CONFIG_GCC_PLUGIN_RANDSTRUCT' not supported" + [[ -v CONFIG_AS_IS_LLVM ]] && \ + [[ "$CONFIG_AS_VERSION" -lt 200000 ]] && \ + die "Clang assembler version < 20 not supported" + return 0 } |