Merge tag 'objtool-core-2026-06-14' of gitolite.kernel.org:pub/scm/linux/kernel/git/tip/tip

Pull objtool updates from Ingo Molnar:

- A large series of KLP fixes and improvements, in preparation of

Merge tag 'objtool-core-2026-06-14' of gitolite.kernel.org:pub/scm/linux/kernel/git/tip/tip

Pull objtool updates from Ingo Molnar:

- A large series of KLP fixes and improvements, in preparation of the
arm64 port (Josh Poimboeuf)

- Fix a number of bugs and issues on specific distro, LTO, FineIBT and
kCFI configs (Josh Poimboeuf)

- Misc other fixes by Josh Poimboeuf and Joe Lawrence

* tag 'objtool-core-2026-06-14' of gitolite.kernel.org:pub/scm/linux/kernel/git/tip/tip: (53 commits)
objtool/klp: Cache dont_correlate() result
objtool: Improve and simplify prefix symbol detection
objtool/klp: Fix kCFI prefix finding/cloning
objtool: Grow __cfi_* prefix symbols for all CFI+CALL_PADDING
objtool/klp: Fix position-dependent checksums for non-relocated jumps/calls
objtool: Add insn_sym() helper
objtool/klp: Add correlation debugging output
objtool/klp: Rewrite symbol correlation algorithm
objtool/klp: Calculate object checksums
klp-build: Validate short-circuit prerequisites
objtool/klp: Remove "objtool --checksum"
klp-build: Use "objtool klp checksum" subcommand
objtool/klp: Add "objtool klp checksum" subcommand
objtool: Consolidate file decoding into decode_file()
objtool/klp: Extricate checksum calculation from validate_branch()
objtool: Add is_cold_func() helper
objtool: Add is_alias_sym() helper
objtool/klp: Handle Clang .data..Lanon anonymous data sections
objtool/klp: Create empty checksum sections for function-less object files
objtool: Include libsubcmd headers directly from source tree
...

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objtool/klp: Fix position-dependent checksums for non-relocated jumps/calls

When computing klp checksums, instructions with non-relocated jump/call
destination offsets are problematic because the of

objtool/klp: Fix position-dependent checksums for non-relocated jumps/calls

When computing klp checksums, instructions with non-relocated jump/call
destination offsets are problematic because the offset values can change
when surrounding code has moved, causing the function to be incorrectly
marked as changed.

Specifically, that includes jumps from alternatives to the end of the
alternative, which from objtool's perspective are jumps to the end of
the alternative instruction block in the original function.

Note that 'jump_dest' jumps don't include sibling calls (those use
call_dest), nor do they include jumps to/from .cold sub functions (those
are cross-section and need a reloc).

Fix it by hashing the opcode bytes (excluding the immediate operand)
along with a position-independent representation of the destination.
For calls, use the function name, and for jumps, use the destination's
offset within its function.

[Note the "9 bit hole" comment was wrong: it has been 8 bits since
commit 70589843b36f ("objtool: Add option to trace function validation")
added the 'trace' field. Adding the 4-bit 'immediate_len' field now
leaves a 4-bit hole.]

Fixes: 0d83da43b1e1 ("objtool/klp: Add --checksum option to generate per-function checksums")
Acked-by: Song Liu <song@kernel.org>
Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>

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objtool/klp: Calculate object checksums

Start checksumming data objects in preparation for revamping the
correlation algorithm.

Acked-by: Song Liu <song@kernel.org>
Signed-off-by: Josh Poimboeuf <j

objtool/klp: Calculate object checksums

Start checksumming data objects in preparation for revamping the
correlation algorithm.

Acked-by: Song Liu <song@kernel.org>
Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>

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objtool/klp: Add "objtool klp checksum" subcommand

Move the checksum functionality out of the main objtool command into a
new "objtool klp checksum" subcommand.

This has the benefit of making the c

objtool/klp: Add "objtool klp checksum" subcommand

Move the checksum functionality out of the main objtool command into a
new "objtool klp checksum" subcommand.

This has the benefit of making the code (and the patch generation
process itself) more modular.

For bisectability, both "objtool --checksum" and "objtool klp checksum"
work for now. The former will be removed after klp-build has been
converted to use the new subcommand.

Acked-by: Song Liu <song@kernel.org>
Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>

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