en Copyright 2015 Java http://kernelsources.org:8080/source/history/linux/tools/objtool/tests/generic/fixtures/checksum_position.c#5b6dca02b3e2254d2fd5706d76d7ab4610a67296 Merge tag 'objtool-core-2026-10-18' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipPull objtool updates from Ingo Molnar: - Add unit test suite for objtool klp functionality and known failure modes (by Song Liu and Puranjay Mohan, with fixes by Joe Lawrence)* tag 'objtool-core-2026-10-18' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (58 commits) objtool/klp: Add test for ThinLTO symbols sharing a demangled name objtool/klp: Add test for Clang switch jump tables objtool/klp: Add test for UBSAN metadata in an unchanged function objtool/klp: Add test for absolute and __ADDRESSABLE symbols objtool/klp: Add test for a patch which strips a data annotation objtool/klp: Add test for the alignment of cloned data sections objtool/klp: Add test for alternative replacement code in checksums objtool/klp: Add test for instruction operand checksums objtool/klp: Add test for a static call introduced by the patch objtool/klp: Add test for tracepoint and pr_debug static branch keys objtool/klp: Add test for a static branch introduced by the patch objtool/klp: Add test for symbols with no checksum entry of their own objtool/klp: Add test for data object checksums objtool/klp: Test text annotations on alternative replacements objtool/klp: Test a hand-built livepatch module's static call keys objtool/klp: Test rejection of a file-local static branch key objtool/klp: Add test for symbols whose linkage the patch changes objtool/klp: Add test for kCFI prefix symbols and traps objtool/klp: Add test for __bug_table, __ex_table and __mcount_loc extraction objtool/klp: Add test for static locals which must not be correlated ... List of files: /linux/tools/objtool/tests/generic/fixtures/checksum_position.c Wed, 21 Oct 2026 00:55:04 +0200 Linus Torvalds <torvalds@linux-foundation.org> http://kernelsources.org:8080/source/history/linux/tools/objtool/tests/generic/fixtures/checksum_position.c#f55eae8f37ea5ff547a8ac4ddafcef21047d5874 objtool/klp: Add test for position-independent checksumsA function that only moves has not changed, and its checksum must not movewith it. Otherwise every patch reports as changed everything that shiftedbecause something ahead of it grew.The fixture is built with -fno-function-sections, overriding the harnessdefault: with per-function sections every function sits at offset 0 of itsown section and nothing ever moves, so the test would prove nothing. Italso calls across to another function rather than looping within itself --a loop branch keeps the same displacement wherever the function goes, so itis not position-dependent to begin with.This tests the behavior of commit cca84cb12908 ("objtool/klp: Fixposition-dependent checksums for non-relocated jumps/calls").Assisted-by: Claude:claude-opus-4Based-on-test-by: Joe Lawrence <joe.lawrence@redhat.com>Assisted-by: Claude:claude-opus-5Signed-off-by: Song Liu <song@kernel.org>Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>Signed-off-by: Ingo Molnar <mingo@kernel.org>Link: https://patch.msgid.link/20260916184351.2720310-37-song@kernel.org List of files: /linux/tools/objtool/tests/generic/fixtures/checksum_position.c Wed, 16 Sep 2026 20:43:29 +0200 Song Liu <song@kernel.org>