From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 EEB992D7BF; Sat, 8 Aug 2026 23:18:15 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786231097; cv=none; b=Yndndft38Ch5gckQLPaMaArCeFKHTeqGrqXGRf6mRxLM/I4uEWV4z50UbOTDec/8Eied+iKjNOZtq0ieQvyPYDud+NiTjArRGF56xpS6KNm0uZM/GAe6efKeM5Kl3YvirdJOhzeJptVq0NphFGrFl1oDxzzE8a80sPIhxwDI/Jk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786231097; c=relaxed/simple; bh=DeWbRgZBKnA4sf0nVK37g2Jy0opIVg9VuuInfL8PCEU=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=E35P4nLs0PQvORyDxlCNCxOx0i8d010845SRBlbQUkyoAfdVLgbqJfxfb7hE6t6olFdOwKIY7gM6YN9TQHmFSNWISvAFl5ucgWP7KziIrClji2xdli/EZC6BqIDnajkdJgedTRadn1WI+u43BIx35UmnhiAU807SB7lBBmNn074= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=TWIBztWa; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="TWIBztWa" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 07F841F000E9; Sat, 8 Aug 2026 23:18:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1786231095; bh=LG5x7pYEt93Jfnp3xRtm3lDEif7tHGtyxh7/VUnQcBY=; h=From:To:Cc:Subject:Date; b=TWIBztWaXyiqlEd+EuDVD9lZMGZuy2NZSKjJWWmEOHKtl2vqcgorIxtNVilKnWWX6 tLmFqwaW3XsoAxGSpn+9IdytZEuX71LS9TNR8rfIeqjh1w5clwMiVhk/au7sHw6ZhO XcQFCKeSkmSpYFqM6W1iAZT1adCkxEYcngc7v9FUEjHh2ujdhDazCSo0gIn1++TQ37 heaDMzEUza7sp575H+21C9kIHUJEDTXWZLEBiu0DSmrwf+FMHN0TKx4YQ6IeP8orK3 4alrinuQLckea9KUwW1ohmhesstftZfwt0x0YDeSiUMiOsVkeE60CyjVaRA2Rvqdcj 7f7U/8qm3WIMw== From: Josh Poimboeuf To: x86@kernel.org Cc: linux-kernel@vger.kernel.org, live-patching@vger.kernel.org, Peter Zijlstra , Joe Lawrence , Song Liu , Catalin Marinas , Will Deacon , linux-arm-kernel@lists.infradead.org, Mark Rutland , Nathan Chancellor , Nicolas Schier , Herbert Xu , Miroslav Benes , Petr Mladek Subject: [PATCH v4 00/22] objtool/arm64: Port klp-build to arm64 Date: Sat, 8 Aug 2026 16:17:04 -0700 Message-ID: X-Mailer: git-send-email 2.54.0 Precedence: bulk X-Mailing-List: live-patching@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Based on tip/objtool/core + the following fixes: - https://lore.kernel.org/cover.1786138493.git.jpoimboe@kernel.org - https://lore.kernel.org/ed4fe1f95071897859ec7fbe9176246cbd4962bf.1786138806.git.jpoimboe@kernel.org - https://lore.kernel.org/1b5ccfa8095bdb1277f84af1c2c2e2205aca03ae.1785992188.git.jpoimboe@kernel.org The full set (including the above fixes) can be found on the following branch: git://git.kernel.org/pub/scm/linux/kernel/git/jpoimboe/linux.git klp-build-arm64 v4: - Replace "objtool: Allow empty alternatives" with "arm64: Remove unnecessary empty alternatives" [Peter] - Add "objtool/klp: Fix .kcfi_traps special section extraction" [Joe] - Fix vmlinux.o objtool options leaking in from Makefile.lib [Sashiko] - Tighten jump-to-end-of-function check [Sashiko] - Drop unneeded linux/kconfig.h include [Sashiko] - Fix bisectability issue with is_mapping_sym()/is_data_mapping_sym() [Sashiko] - Add missing ALLOW_ERROR_INJECTION() to arm64 syscall macro [Sashiko] v3: https://lore.kernel.org/cover.1778642120.git.jpoimboe@kernel.org - Too many changes to list. Did a lot of testing and fixed a bunch of issues (many of which have already been merged in tip/objtool/core). v2: https://lore.kernel.org/cover.1773787568.git.jpoimboe@kernel.org - patches 1-2 were merged, rebase on tip/master - improve commit message for "objtool: Extricate checksum calculation from validate_branch()" - add review tags v1: https://lore.kernel.org/cover.1772681234.git.jpoimboe@kernel.org Port objtool and the klp-build tooling (for building livepatch modules) to arm64. Note this doesn't bring all the objtool bells and whistles to arm64, nor any of the CFG reverse engineering. This only adds the bare minimum needed for 'objtool --checksum'. And note that objtool still doesn't get enabled at all for normal arm64 kernel builds, so this doesn't affect any users other than those running klp-build directly. Josh Poimboeuf (22): objtool/klp: Fix .kcfi_traps special section extraction klp-build: Reject patches to init/*.c arm64: Annotate intra-function calls arm64: Fix EFI linking with -fdata-sections arm64: Rename TRAMP_VALIAS -> TRAMP_VALIAS_ASM in asm-offsets arm64: vdso: Discard .discard.* sections arm64: Annotate special section entries arm64: Remove unnecessary empty alternatives crypto: arm64: Move data to .rodata objtool: Allow setting --mnop without --mcount kbuild: Only run objtool if there is at least one command objtool: Ignore jumps to the end of the function for checksum runs objtool: Refactor elf_add_data() to use a growable data buffer objtool: Reuse string references objtool: Prevent kCFI hashes from being decoded as instructions objtool/klp: Add arm64 support for prefix/PFE detection objtool/klp: Filter arm64 mapping symbols in find_symbol_by_offset() objtool/klp: Don't correlate arm64 mapping symbols objtool/klp: Clone inline alternative replacements objtool/klp: Introduce objtool for arm64 klp-build: Support cross-compilation klp-build: Add arm64 syscall patching macro arch/arm64/Kconfig | 2 + arch/arm64/include/asm/alternative-macros.h | 27 +- arch/arm64/include/asm/asm-bug.h | 2 + arch/arm64/include/asm/asm-extable.h | 21 +- arch/arm64/include/asm/assembler.h | 4 +- arch/arm64/include/asm/jump_label.h | 2 + arch/arm64/kernel/asm-offsets.c | 7 +- arch/arm64/kernel/entry.S | 10 +- arch/arm64/kernel/proton-pack.c | 12 +- arch/arm64/kernel/vdso/vdso.lds.S | 1 + arch/arm64/kernel/vmlinux.lds.S | 2 +- arch/x86/boot/startup/Makefile | 2 +- include/linux/annotate.h | 14 +- include/linux/livepatch_helpers.h | 20 ++ include/linux/objtool_types.h | 1 + lib/crypto/arm64/sha2-armv8.pl | 18 +- scripts/Makefile.build | 4 +- scripts/Makefile.lib | 52 ++-- scripts/Makefile.vmlinux_o | 18 +- scripts/livepatch/klp-build | 24 +- tools/include/linux/objtool_types.h | 1 + tools/objtool/Makefile | 4 + tools/objtool/arch/arm64/Build | 2 + tools/objtool/arch/arm64/decode.c | 177 ++++++++++++ .../arch/arm64/include/arch/cfi_regs.h | 11 + tools/objtool/arch/arm64/include/arch/elf.h | 15 ++ .../objtool/arch/arm64/include/arch/special.h | 21 ++ tools/objtool/arch/arm64/special.c | 30 +++ tools/objtool/arch/x86/include/arch/elf.h | 2 + tools/objtool/builtin-check.c | 5 - tools/objtool/check.c | 52 ++-- tools/objtool/elf.c | 170 +++++++----- tools/objtool/include/objtool/elf.h | 48 +++- tools/objtool/klp-diff.c | 254 ++++++++++++++++-- tools/objtool/klp-symid.c | 2 +- 35 files changed, 843 insertions(+), 194 deletions(-) create mode 100644 tools/objtool/arch/arm64/Build create mode 100644 tools/objtool/arch/arm64/decode.c create mode 100644 tools/objtool/arch/arm64/include/arch/cfi_regs.h create mode 100644 tools/objtool/arch/arm64/include/arch/elf.h create mode 100644 tools/objtool/arch/arm64/include/arch/special.h create mode 100644 tools/objtool/arch/arm64/special.c -- 2.54.0