Josh Poimboeuf 24ebfcd65a
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 >
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