From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0A59533C50D; Thu, 23 Apr 2026 04:04:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776917064; cv=none; b=nDR8JcMjrMqMz9sGuwEYkaI7skry9gvryYxv4e22hhO31D/bYoK+Ye6/vsrSvVAaNgnYudd8PAz1xJJUYa0+JPyVxSkx5bV+HsjHAi5mlIf/uuJJMaWIhm+30lO6mzYm9/yuCRSpPystfbMn6VNEXRd+9/SuoSgn8wsA5cfuCqA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776917064; c=relaxed/simple; bh=6PwMstg7W29VvMhac81st8EasMYKQtNfD6lNNNDT7GM=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=dZvHz9Fg8T1f4P6+qTwQyDO9SkqblHvBQOXjZM70sBbZE4kl+14mea0Jf1wmhqmvAKKwW+ktNkBBxA7Xj1k7MWpl6gj1Hg36l0lFTxpU3fKbxuK+JcTs14FnKrWXWPeWZUfXwvK0DJczAcfc4BDtAozegK7+MHiSWOwmBJVuwhk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=FsC7GsKl; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="FsC7GsKl" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 43EBBC2BCB2; Thu, 23 Apr 2026 04:04:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1776917063; bh=6PwMstg7W29VvMhac81st8EasMYKQtNfD6lNNNDT7GM=; h=From:To:Cc:Subject:Date:From; b=FsC7GsKlJnlYbjYGVTUUSp0bgvt37dIxCeFGghvzA01cgbgR+Rrw5s2k4+mEQJ+Nx 1bB36FDprnWHM4Qs2y2v5JAAaPG49wA2vg/OJ8vUARb56k6PZQIjcNxDOdCDiZbv3p 4Wl4FhTCwwM1htwl/NVicNxAKljzc47yDy4zgk8OAcvYfdsPlneGHe31oepdpwje8C aK688kQHyA6eJK23ORdQH+gqyjJ0I/wh+qe24fepIFz1JlrkTKSmvAARMf3AzBSYM5 v3QGawGVFZlcYb0oSVg4scxiGbxONBmWQdzM12PXHgIStP0RT8AVRCjFSWfS3MO2ko pAnV6GiRsZ4oQ== From: Josh Poimboeuf To: x86@kernel.org Cc: linux-kernel@vger.kernel.org, live-patching@vger.kernel.org, Peter Zijlstra , Joe Lawrence , Song Liu , Miroslav Benes , Petr Mladek Subject: [PATCH 00/48] objtool/klp: Some klp-build fixes and improvements Date: Wed, 22 Apr 2026 21:03:28 -0700 Message-ID: X-Mailer: git-send-email 2.53.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit While working on the (upcoming) arm64 support, I ended up shaking out a lot of bugs by tested several patches on a variety of configs (distro, LTO, FineIBT, kCFI, etc). While arm64 support seems to be working well, I decided to leave those patches out of this set to try to keep the number of patches "reasonable". And these stand alone as nice improvements for x86 anyway. Full arm64 support (this set + 19 more) can be found here: git://git.kernel.org/pub/scm/linux/kernel/git/jpoimboe/linux.git klp-build-arm64 Joe Lawrence (2): objtool/klp: Fix is_uncorrelated_static_local() for Clang objtool/klp: Fix create_fake_symbols() skipping entsize-based sections Josh Poimboeuf (46): objtool/klp: Fix .data..once static local non-correlation objtool/klp: Don't correlate __ADDRESSABLE() symbols objtool/klp: Ignore __UNIQUE_ID_*() PCI stub functions objtool: Move mark_rodata() to elf.c objtool/klp: Don't correlate rodata symbols objtool/klp: Don't correlate absolute symbols objtool/klp: Don't correlate __initstub__ symbols objtool/klp: Fix --debug-checksum for duplicate symbol names objtool/klp: Fix handling of zero-length .altinstr_replacement sections objtool/klp: Fix cloning of zero-length section symbols objtool/klp: Fix XXH3 state memory leak objtool/klp: Fix extraction of text annotations for alternatives objtool/klp: Fix kCFI trap handling objtool/klp: Fix relocation conversion failures for R_X86_64_NONE objtool: Fix reloc hash collision in find_reloc_by_dest_range() klp-build: Fix hang on out-of-date .config klp-build: Fix checksum comparison for changed offsets klp-build: Don't use errexit klp-build: Validate patch file existence klp-build: Suppress excessive fuzz output by default klp-build: Fix patch cleanup on interrupt klp-build: Reject patches to vDSO klp-build: Reject patches to realmode objtool/klp: Don't set sym->file for section symbols objtool: Include libsubcmd headers directly from source tree objtool/klp: Create empty checksum sections for function-less object files klp-build: Print "objtool klp diff" command in verbose mode objtool/klp: Handle Clang .data..Lanon anonymous data sections objtool: Add is_alias_sym() helper objtool: Add is_cold_func() helper objtool/klp: Extricate checksum calculation from validate_branch() objtool: Consolidate file decoding into decode_file() objtool/klp: Add "objtool klp checksum" subcommand klp-build: Use "objtool klp checksum" subcommand objtool/klp: Remove "objtool --checksum" klp-build: Validate short-circuit prerequisites objtool: Replace iterator callbacks with for_each_sym_by_*() objtool/klp: Calculate object checksums objtool/klp: Rewrite symbol correlation algorithm objtool/klp: Add correlation debugging output objtool: Add insn_sym() helper objtool/klp: Fix position-dependent checksums for non-relocated jumps/calls x86/Kconfig: Enable CONFIG_PREFIX_SYMBOLS for FineIBT objtool/klp: Make function prefix handling more generic objtool: Improve and simplify prefix symbol detection objtool/klp: Cache dont_correlate() result arch/x86/Kconfig | 2 +- scripts/livepatch/klp-build | 183 +++-- tools/objtool/Build | 2 +- tools/objtool/Makefile | 4 +- tools/objtool/arch/x86/decode.c | 17 +- tools/objtool/builtin-check.c | 17 +- tools/objtool/builtin-klp.c | 1 + tools/objtool/check.c | 363 ++-------- tools/objtool/disas.c | 22 +- tools/objtool/elf.c | 96 +-- tools/objtool/include/objtool/arch.h | 3 + tools/objtool/include/objtool/check.h | 33 +- tools/objtool/include/objtool/checksum.h | 52 +- tools/objtool/include/objtool/elf.h | 69 +- tools/objtool/include/objtool/klp.h | 1 + tools/objtool/include/objtool/warn.h | 57 +- tools/objtool/klp-checksum.c | 346 +++++++++ tools/objtool/klp-diff.c | 861 +++++++++++++++++------ tools/objtool/objtool.c | 3 - tools/objtool/trace.c | 8 +- 20 files changed, 1431 insertions(+), 709 deletions(-) create mode 100644 tools/objtool/klp-checksum.c -- 2.53.0