From: Peter Zijlstra <peterz@infradead.org>
To: Kees Cook <kees@kernel.org>
Cc: Justin Stitt <justinstitt@google.com>,
Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>,
Marco Elver <elver@google.com>,
Andrey Konovalov <andreyknvl@gmail.com>,
Andrey Ryabinin <ryabinin.a.a@gmail.com>,
Jonathan Corbet <corbet@lwn.net>,
Shuah Khan <skhan@linuxfoundation.org>,
Miguel Ojeda <ojeda@kernel.org>,
Nathan Chancellor <nathan@kernel.org>,
kasan-dev@googlegroups.com, linux-doc@vger.kernel.org,
llvm@lists.linux.dev,
Linus Torvalds <torvalds@linux-foundation.org>,
Nicolas Schier <nsc@kernel.org>, Arnd Bergmann <arnd@arndb.de>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Andrew Morton <akpm@linux-foundation.org>,
linux-kernel@vger.kernel.org, linux-hardening@vger.kernel.org,
linux-kbuild@vger.kernel.org
Subject: Re: [PATCH 3/5] compiler_attributes: Add overflow_behavior macros __ob_trap and __ob_wrap
Date: Wed, 1 Apr 2026 11:08:15 +0200 [thread overview]
Message-ID: <20260401090815.GV3738786@noisy.programming.kicks-ass.net> (raw)
In-Reply-To: <202603311249.30B44C66@keescook>
On Tue, Mar 31, 2026 at 12:52:10PM -0700, Kees Cook wrote:
> I think for this series, __ob_trap/__ob_wrap is what should be used.
>
> And for other folks, the background here is that we originally wanted
> to use macros for "__trap" and "__wrap", but the powerpc C compiler
> (both Clang and GCC) have a builtin macro named "__trap" already. So
> I switched to just using the Clang-native type qualifier. We can use
> the attribute style too, but there was a lot of confusion during the
> Clang development phases where people kept forgetting this was a type
> qualifier, not an attribute (i.e. the attribute is an internal alias
> for the qualifier, and the qualifier is a new type).
Since you mention qualifiers...
What is the result of __typeof_unqual__(int __ob_trap) ?
next prev parent reply other threads:[~2026-04-01 9:08 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-31 16:37 [PATCH 0/5] Introduce Overflow Behavior Types Kees Cook
2026-03-31 16:37 ` [PATCH 1/5] refcount: Remove unused __signed_wrap function annotations Kees Cook
2026-03-31 16:37 ` [PATCH 2/5] hardening: Introduce Overflow Behavior Types support Kees Cook
2026-03-31 16:37 ` [PATCH 3/5] compiler_attributes: Add overflow_behavior macros __ob_trap and __ob_wrap Kees Cook
2026-03-31 17:01 ` Miguel Ojeda
2026-03-31 17:09 ` Miguel Ojeda
2026-03-31 17:09 ` Justin Stitt
2026-03-31 17:14 ` Miguel Ojeda
2026-03-31 17:17 ` Justin Stitt
2026-03-31 19:52 ` Kees Cook
2026-04-01 9:08 ` Peter Zijlstra [this message]
2026-04-01 20:21 ` Kees Cook
2026-04-01 20:30 ` Peter Zijlstra
2026-04-01 20:55 ` Kees Cook
2026-04-01 23:42 ` Justin Stitt
2026-04-02 9:13 ` David Laight
2026-03-31 17:16 ` Linus Torvalds
2026-03-31 17:18 ` Linus Torvalds
2026-04-01 7:19 ` Vincent Mailhol
2026-04-01 9:20 ` Peter Zijlstra
2026-04-01 19:43 ` Kees Cook
2026-04-01 19:42 ` Kees Cook
2026-03-31 16:37 ` [PATCH 4/5] lkdtm/bugs: Add basic Overflow Behavior Types test Kees Cook
2026-03-31 17:16 ` Justin Stitt
2026-03-31 16:37 ` [PATCH 5/5] types: Add standard __ob_trap and __ob_wrap scalar types Kees Cook
2026-03-31 17:10 ` Linus Torvalds
2026-03-31 17:47 ` Miguel Ojeda
2026-03-31 18:02 ` Linus Torvalds
2026-03-31 18:25 ` Linus Torvalds
2026-03-31 18:59 ` Kees Cook
2026-03-31 20:01 ` Linus Torvalds
2026-03-31 18:32 ` Kees Cook
2026-03-31 18:36 ` Linus Torvalds
2026-03-31 18:16 ` Kees Cook
2026-03-31 20:03 ` Kees Cook
2026-03-31 20:11 ` Linus Torvalds
2026-03-31 20:18 ` Linus Torvalds
2026-03-31 20:31 ` Kees Cook
2026-03-31 20:58 ` Linus Torvalds
2026-03-31 21:50 ` Justin Stitt
2026-03-31 23:49 ` Kees Cook
2026-03-31 23:50 ` Linus Torvalds
2026-04-01 8:31 ` Peter Zijlstra
2026-04-01 20:52 ` Kees Cook
2026-04-02 5:38 ` Peter Zijlstra
2026-04-10 17:48 ` Justin Stitt
2026-04-01 8:57 ` Peter Zijlstra
2026-04-01 20:23 ` Kees Cook
2026-04-01 9:38 ` Peter Zijlstra
2026-04-01 21:41 ` Kees Cook
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