diff options
| author | Josh Poimboeuf <jpoimboe@kernel.org> | 2025-09-17 09:04:08 -0700 |
|---|---|---|
| committer | Josh Poimboeuf <jpoimboe@kernel.org> | 2025-10-14 14:50:19 -0700 |
| commit | 24ebfcd65a871df4555b98c49c9ed9a92f146113 (patch) | |
| tree | db2c828221173c17c38c5ddc37c107a9bb7d5465 /scripts/Makefile.lib | |
| parent | 59adee07b568fb78e2bf07df1f22f3fe45b7240a (diff) | |
livepatch/klp-build: Introduce klp-build script for generating livepatch modules
Add a klp-build script which automates the generation of a livepatch
module from a source .patch file by performing the following steps:
- Builds an original kernel with -function-sections and
-fdata-sections, plus objtool function checksumming.
- Applies the .patch file and rebuilds the kernel using the same
options.
- Runs 'objtool klp diff' to detect changed functions and generate
intermediate binary diff objects.
- Builds a kernel module which links the diff objects with some
livepatch module init code (scripts/livepatch/init.c).
- Finalizes the livepatch module (aka work around linker wreckage)
using 'objtool klp post-link'.
Acked-by: Petr Mladek <pmladek@suse.com>
Tested-by: Joe Lawrence <joe.lawrence@redhat.com>
Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
Diffstat (limited to 'scripts/Makefile.lib')
| -rw-r--r-- | scripts/Makefile.lib | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib index 28a1c08e3b22..f4b33919ec37 100644 --- a/scripts/Makefile.lib +++ b/scripts/Makefile.lib @@ -173,6 +173,7 @@ ifdef CONFIG_OBJTOOL objtool := $(objtree)/tools/objtool/objtool +objtool-args-$(CONFIG_KLP_BUILD) += --checksum objtool-args-$(CONFIG_HAVE_JUMP_LABEL_HACK) += --hacks=jump_label objtool-args-$(CONFIG_HAVE_NOINSTR_HACK) += --hacks=noinstr objtool-args-$(CONFIG_MITIGATION_CALL_DEPTH_TRACKING) += --hacks=skylake |