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Fri, 9 Oct 2026 08:41:34 -0400 (EDT) From: FUJITA Tomonori To: linux@armlinux.org.uk, ojeda@kernel.org Cc: ardb@kernel.org, chrisi.schrefl@gmail.com, linux-arm-kernel@lists.infradead.org, a.hindborg@kernel.org, acourbot@nvidia.com, aliceryhl@google.com, bjorn3_gh@protonmail.com, boqun@kernel.org, dakr@kernel.org, daniel.almeida@collabora.com, gary@garyguo.net, lossin@kernel.org, tamird@kernel.org, tmgross@umich.edu, work@onurozkan.dev, rust-for-linux@vger.kernel.org, FUJITA Tomonori Subject: [PATCH v1] ARM: rust: Generate unwind tables for Rust code with ARM_UNWIND Date: Fri, 9 Oct 2026 21:41:24 +0900 Message-ID: <20261009124124.1176706-1-tomo@flapping.org> X-Mailer: git-send-email 2.43.0 MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20261009_054143_589218_129206C3 X-CRM114-Status: UNSURE ( 8.26 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: FUJITA Tomonori When CONFIG_ARM_UNWIND=y, C code is built with -funwind-tables, but Rust code is built with -Cforce-unwind-tables=n. As a result, the unwinder stops at the first Rust frame. Pass -Cforce-unwind-tables=y to rustc in that case, as arm64 does. Fixes: ccb8ce526807 ("ARM: 9441/1: rust: Enable Rust support for ARMv7") Assisted-by: LLM Signed-off-by: FUJITA Tomonori --- arch/arm/Makefile | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm/Makefile b/arch/arm/Makefile index 573813ef5e77..d59b8daf4f4e 100644 --- a/arch/arm/Makefile +++ b/arch/arm/Makefile @@ -117,6 +117,7 @@ endif ifeq ($(CONFIG_ARM_UNWIND),y) CFLAGS_ABI +=-funwind-tables +KBUILD_RUSTFLAGS += -Cforce-unwind-tables=y endif ifeq ($(CONFIG_CC_IS_CLANG),y) base-commit: a90ee4305c4a5df72c11b31dacfdc76e00fcf78a -- 2.43.0