Re: [PATCH] riscv: fix KUnit test_kprobes crash when building with Clang

[Paul Walmsley]

+ Nam Cao, Nathan Chancellor 

On Thu, 13 Nov 2025, 许佳凯 wrote:

> Clang misaligns the test_kprobes_addresses and test_kprobes_functions
> arrays, or does not export local labels by default. Both can cause
> kmalloc_array() allocation errors and KUnit failures.
> 
> This patch fixes the issue by:
> - Adding .section .rodata to explicitly place arrays in the read-only data segment.
> - Adding .align 3 to align arrays to 8 bytes.
> - Adding .globl to probe labels to ensure symbols are visible.
> 
> For detailed debug and analysis, see:
> https://github.com/j1akai/temp/blob/main/20251113/readme.md
> 
> Signed-off-by: Jiakai Xu <xujiakai2025@xxxxxxxxxxx>

Hello Jiakai Xu,

Thanks for the patch.  Have you reported this difference in behavior to 
the Clang/LLVM folks so they can render an opinion on it?  We can consider 
this as a short term workaround if it's indeed a toolchain issue, but I'd 
like to hear from the LLVM folks.

Also: could you please include the narrative from your page 

    https://github.com/j1akai/temp/blob/main/20251113/readme.md 

in the patch description, just in case that URL eventually becomes 
unavailable?

thanks,


- Paul