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| author | Jessica Yu <jeyu@redhat.com> | 2016-03-22 20:03:18 -0400 |
|---|---|---|
| committer | Jiri Kosina <jkosina@suse.cz> | 2016-04-01 15:00:11 +0200 |
| commit | 425595a7fc2096ab46c741b5ed5372c5ab5bbeac (patch) | |
| tree | 9cf12348ba352e7679be0aadf370aa0a7bc5509e /samples/livepatch | |
| parent | f31e0960f395df0c9197de53674365e2a28a129b (diff) | |
| download | linux-425595a7fc2096ab46c741b5ed5372c5ab5bbeac.tar.bz2 | |
livepatch: reuse module loader code to write relocations
Reuse module loader code to write relocations, thereby eliminating the need
for architecture specific relocation code in livepatch. Specifically, reuse
the apply_relocate_add() function in the module loader to write relocations
instead of duplicating functionality in livepatch's arch-dependent
klp_write_module_reloc() function.
In order to accomplish this, livepatch modules manage their own relocation
sections (marked with the SHF_RELA_LIVEPATCH section flag) and
livepatch-specific symbols (marked with SHN_LIVEPATCH symbol section
index). To apply livepatch relocation sections, livepatch symbols
referenced by relocs are resolved and then apply_relocate_add() is called
to apply those relocations.
In addition, remove x86 livepatch relocation code and the s390
klp_write_module_reloc() function stub. They are no longer needed since
relocation work has been offloaded to module loader.
Lastly, mark the module as a livepatch module so that the module loader
canappropriately identify and initialize it.
Signed-off-by: Jessica Yu <jeyu@redhat.com>
Reviewed-by: Miroslav Benes <mbenes@suse.cz>
Acked-by: Josh Poimboeuf <jpoimboe@redhat.com>
Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com> # for s390 changes
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'samples/livepatch')
| -rw-r--r-- | samples/livepatch/livepatch-sample.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/samples/livepatch/livepatch-sample.c b/samples/livepatch/livepatch-sample.c index fb8c8614e728..e34f871e69b1 100644 --- a/samples/livepatch/livepatch-sample.c +++ b/samples/livepatch/livepatch-sample.c @@ -89,3 +89,4 @@ static void livepatch_exit(void) module_init(livepatch_init); module_exit(livepatch_exit); MODULE_LICENSE("GPL"); +MODULE_INFO(livepatch, "Y"); |