From: Peter Zijlstra <peterz@infradead.org>
To: Josh Poimboeuf <jpoimboe@kernel.org>
Cc: x86@kernel.org, linux-kernel@vger.kernel.org,
live-patching@vger.kernel.org,
Joe Lawrence <joe.lawrence@redhat.com>,
Song Liu <song@kernel.org>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>,
linux-arm-kernel@lists.infradead.org,
Mark Rutland <mark.rutland@arm.com>,
Miroslav Benes <mbenes@suse.cz>, Petr Mladek <pmladek@suse.com>
Subject: Re: [PATCH v3 10/21] objtool: Ignore jumps to the end of the function for checksum runs
Date: Wed, 13 May 2026 09:36:17 +0200 [thread overview]
Message-ID: <20260513073617.GH1889694@noisy.programming.kicks-ass.net> (raw)
In-Reply-To: <b3b58101e15e1bb5266e57134f0b65f7d8efdd4b.1778642120.git.jpoimboe@kernel.org>
On Tue, May 12, 2026 at 08:33:44PM -0700, Josh Poimboeuf wrote:
> Sometimes Clang arm64 code jumps to the end of the function for UB.
> No need to make that an error for checksum runs.
I'm not sure I understand the rationale. If the compiler trips UB, we
want to be complaining about that no?
Same as when clang just stops code-gen, also something we commonly see
when it hits UB.
next prev parent reply other threads:[~2026-05-13 7:46 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-13 3:33 [PATCH v3 00/21] objtool/arm64: Port klp-build to arm64 Josh Poimboeuf
2026-05-13 3:33 ` [PATCH v3 01/21] klp-build: Reject patches to init/*.c Josh Poimboeuf
2026-05-13 3:33 ` Josh Poimboeuf
2026-05-13 3:33 ` [PATCH v3 03/21] arm64: Fix EFI linking with -fdata-sections Josh Poimboeuf
2026-05-13 3:33 ` Josh Poimboeuf
2026-05-13 3:33 ` [PATCH v3 05/21] arm64: vdso: Discard .discard.* sections Josh Poimboeuf
2026-05-13 3:34 ` Josh Poimboeuf
2026-05-13 3:33 ` [PATCH v3 06/21] arm64: Annotate special section entries Josh Poimboeuf
2026-05-13 3:34 ` Josh Poimboeuf
2026-05-13 3:33 ` [PATCH v3 07/21] crypto: arm64: Move data to .rodata Josh Poimboeuf
2026-05-13 3:34 ` Josh Poimboeuf
2026-05-13 3:33 ` [PATCH v3 08/21] objtool: Allow setting --mnop without --mcount Josh Poimboeuf
2026-05-13 3:34 ` Josh Poimboeuf
2026-05-13 3:33 ` [PATCH v3 09/21] kbuild: Only run objtool if there is at least one command Josh Poimboeuf
2026-05-13 3:34 ` Josh Poimboeuf
2026-05-13 3:33 ` [PATCH v3 12/21] objtool: Refactor elf_add_data() to use a growable data buffer Josh Poimboeuf
2026-05-13 3:34 ` Josh Poimboeuf
2026-05-13 3:33 ` [PATCH v3 13/21] objtool: Reuse string references Josh Poimboeuf
2026-05-13 3:34 ` Josh Poimboeuf
2026-05-13 3:33 ` [PATCH v3 14/21] objtool: Prevent kCFI hashes from being decoded as instructions Josh Poimboeuf
2026-05-13 3:34 ` Josh Poimboeuf
2026-05-13 3:33 ` [PATCH v3 15/21] objtool/klp: Add arm64 support for prefix/PFE detection Josh Poimboeuf
2026-05-13 3:34 ` Josh Poimboeuf
2026-05-13 3:33 ` [PATCH v3 16/21] objtool/klp: Filter arm64 mapping symbols in find_symbol_by_offset() Josh Poimboeuf
2026-05-13 3:34 ` Josh Poimboeuf
2026-05-13 3:33 ` [PATCH v3 17/21] objtool/klp: Don't correlate arm64 mapping symbols Josh Poimboeuf
2026-05-13 3:34 ` Josh Poimboeuf
2026-05-13 3:33 ` [PATCH v3 18/21] objtool/klp: Clone inline alternative replacements Josh Poimboeuf
2026-05-13 3:34 ` Josh Poimboeuf
2026-05-13 3:33 ` [PATCH v3 19/21] objtool/klp: Introduce objtool for arm64 Josh Poimboeuf
2026-05-13 3:34 ` Josh Poimboeuf
2026-05-13 3:33 ` [PATCH v3 20/21] klp-build: Support cross-compilation Josh Poimboeuf
2026-05-13 3:34 ` Josh Poimboeuf
2026-05-13 3:33 ` [PATCH v3 21/21] klp-build: Add arm64 syscall patching macro Josh Poimboeuf
2026-05-13 3:34 ` Josh Poimboeuf
2026-05-13 3:33 ` [PATCH v3 00/21] objtool/arm64: Port klp-build to arm64 Josh Poimboeuf
2026-05-13 3:33 ` [PATCH v3 02/21] arm64: Annotate intra-function calls Josh Poimboeuf
2026-05-13 3:33 ` Josh Poimboeuf
2026-05-13 3:34 ` [PATCH v3 04/21] arm64: Rename TRAMP_VALIAS -> TRAMP_VALIAS_ASM in asm-offsets Josh Poimboeuf
2026-05-13 3:33 ` Josh Poimboeuf
2026-05-13 3:34 ` [PATCH v3 10/21] objtool: Ignore jumps to the end of the function for checksum runs Josh Poimboeuf
2026-05-13 3:33 ` Josh Poimboeuf
2026-05-13 7:36 ` Peter Zijlstra [this message]
2026-05-13 3:34 ` [PATCH v3 11/21] objtool: Allow empty alternatives Josh Poimboeuf
2026-05-13 3:33 ` Josh Poimboeuf
2026-05-13 7:37 ` Peter Zijlstra
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