Re: [RFC PATCH v4 22/37] arm64: kernel: Skip validation of kuser32.o

[Chen Zhongjin]

On 2022/5/6 18:06, Mark Rutland wrote:
>> However for my build kuser32.o content is in .text 
> 
> We should be able to move that into .rodata; it's never executed in kernel context.
> 
>> and there is only `vdso` symbol in .rodata without `vdso32`.
> 
> That means you're not building with CROSS_COMPILE_COMPAT, and so we can't build
> the 32-bit VDSO.
> 
>> And for defconfig the CONFIG_KUSER_HELPERS=y is on.
> 
> Yes.
> 
>> According to your description, it seems something wrong here?
> 
> Sorry, I was wrong about how we linked the kuser32 code.
> 
> I believe we can move that into .rodata by adding:
> 
> 	.section .rodata
> 
> ... to the start of that.

It works.

Thanks!

> I think that'd be a nice cleanup to do regardless of objtool.
> 
> Thanks,
> Mark.
> .