[PATCH v1] ARM: rust: Generate unwind tables for Rust code with ARM_UNWIND

[FUJITA Tomonori]

Hi Russell, Miguel,

On Fri,  9 Oct 2026 21:41:24 +0900
FUJITA Tomonori <tomo at flapping.org> wrote:

> From: FUJITA Tomonori <fujita.tomonori at gmail.com>
> 
> 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 <fujita.tomonori at gmail.com>
> ---
>  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

Gentle ping. The patch still applies cleanly on top of v7.4-rc1.

Which tree should this go through?