From: Thomas Gleixner <tglx@linutronix.de>
To: Miguel Ojeda <ojeda@kernel.org>,
Josh Poimboeuf <jpoimboe@kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
Masahiro Yamada <masahiroy@kernel.org>
Cc: x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
"Nathan Chancellor" <nathan@kernel.org>,
"Nicolas Schier" <nicolas@fjasle.eu>,
"Miguel Ojeda" <ojeda@kernel.org>,
"Wedson Almeida Filho" <wedsonaf@gmail.com>,
"Alex Gaynor" <alex.gaynor@gmail.com>,
"Boqun Feng" <boqun.feng@gmail.com>,
"Gary Guo" <gary@garyguo.net>,
"Björn Roy Baron" <bjorn3_gh@protonmail.com>,
"Benno Lossin" <benno.lossin@proton.me>,
"Andreas Hindborg" <a.hindborg@samsung.com>,
"Alice Ryhl" <aliceryhl@google.com>,
rust-for-linux@vger.kernel.org, linux-kernel@vger.kernel.org,
patches@lists.linux.dev
Subject: Re: [PATCH v3 3/6] x86/rust: support MITIGATION_RETHUNK
Date: Fri, 09 Aug 2024 22:03:11 +0200 [thread overview]
Message-ID: <87bk21tqf4.ffs@tglx> (raw)
In-Reply-To: <20240725183325.122827-4-ojeda@kernel.org>
On Thu, Jul 25 2024 at 20:33, Miguel Ojeda wrote:
> The Rust compiler added support for `-Zfunction-return=thunk-extern` [1]
> in 1.76.0 [2], i.e. the equivalent of `-mfunction-return=thunk-extern`.
> Thus add support for `MITIGATION_RETHUNK`.
>
> Without this, `objtool` would warn if enabled for Rust and already warns
> under IBT builds, e.g.:
>
> samples/rust/rust_print.o: warning: objtool:
> _R...init+0xa5c: 'naked' return found in RETHUNK build
>
> Link: https://github.com/rust-lang/rust/issues/116853 [1]
> Link: https://github.com/rust-lang/rust/pull/116892 [2]
> Reviewed-by: Gary Guo <gary@garyguo.net>
> Tested-by: Alice Ryhl <aliceryhl@google.com>
> Tested-by: Benno Lossin <benno.lossin@proton.me>
> Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
next prev parent reply other threads:[~2024-08-09 20:03 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-07-25 18:33 [PATCH v3 0/6] Rust: support `CPU_MITIGATIONS` and enable `objtool` Miguel Ojeda
2024-07-25 18:33 ` [PATCH v3 1/6] rust: module: add static pointer to `{init,cleanup}_module()` Miguel Ojeda
2024-08-07 10:24 ` Gary Guo
2024-07-25 18:33 ` [PATCH v3 2/6] x86/rust: support MITIGATION_RETPOLINE Miguel Ojeda
2024-07-25 18:33 ` [PATCH v3 3/6] x86/rust: support MITIGATION_RETHUNK Miguel Ojeda
2024-08-09 20:03 ` Thomas Gleixner [this message]
2024-07-25 18:33 ` [PATCH v3 4/6] x86/rust: support MITIGATION_SLS Miguel Ojeda
2024-07-25 18:33 ` [PATCH v3 5/6] objtool/rust: list `noreturn` Rust functions Miguel Ojeda
2024-07-26 7:04 ` Peter Zijlstra
2024-07-26 7:41 ` Alice Ryhl
2024-08-06 19:42 ` Kees Cook
2024-08-06 20:22 ` Peter Zijlstra
2024-08-06 21:29 ` Miguel Ojeda
2024-07-25 18:33 ` [PATCH v3 6/6] objtool/kbuild/rust: enable objtool for Rust Miguel Ojeda
2024-07-25 19:10 ` [PATCH v3 0/6] Rust: support `CPU_MITIGATIONS` and enable `objtool` Benno Lossin
2024-08-18 21:34 ` Miguel Ojeda
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