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create_fake_symbols() gives each special section entry a symbol so entries
can be extracted individually. Entries with ANNOTATE_DATA_SPECIAL are
handled first; the rest have their boundaries derived from the entry or
relocation size.
The second pass has to key off whether the first one created symbols, not
off whether the section already has something at offset 0. Clang puts an
assembler-local label at the start of .kcfi_traps, and treating that as
already handled means nothing is extracted: klp diff still reports the
changed function and succeeds, but the special section is missing from the
module.
The fixture reproduces the shape without needing CFI or x86.
Signed-off-by: Puranjay Mohan <puranjay@kernel.org>
Signed-off-by: Song Liu <song@kernel.org>
Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Assisted-by: Claude:claude-opus-5
Link: https://patch.msgid.link/20260916184351.2720310-18-song@kernel.org
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