en Copyright 2015 Java http://kernelsources.org:8080/source/history/linux/tools/objtool/tests/generic/fixtures/abs_and_addressable.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/abs_and_addressable.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/abs_and_addressable.c#91c6748459855f3782d445f1a6362a20240fc14e objtool/klp: Add test for absolute and __ADDRESSABLE symbolsA SHN_ABS symbol has no section, so any walk of sym->sec which does notcheck dereferences NULL, and the kernel has plenty of them -- from linkerscripts and from .set in assembly. __ADDRESSABLE() emits a pointer into.discard.addressable purely to keep a symbol referenced; it means nothingto a livepatch and is discarded at link time, but it is a relocation likeany other and gets looked at.Neither is what the patch changes. What this guards against is not a wronganswer but a crash or an error on input the kernel produces routinely,which would make every function near one unpatchable.Not isolated to a single line, and the test says so: the absolute symbolhere has zero length, so it is excluded before the section check is reachedand removing that check alone changes nothing observable.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/20260916184351.2720310-56-song@kernel.org List of files: /linux/tools/objtool/tests/generic/fixtures/abs_and_addressable.c Wed, 16 Sep 2026 20:43:48 +0200 Song Liu <song@kernel.org>