Re: [PATCH v2 0/4] Introduce %rip-relative addressing to PER_CPU_VAR macro

H. Peter Anvin
2023-10-12T21:22:28Z

On 10/12/23 14:17, Uros Bizjak wrote:
>>
>> Are you PIC-adjusting the percpu variables as well?
>
> After this patch (and after fixing percpu_stable_op to use "a" operand
> modifier on GCC), the only *one* remaining absolute reference to
> percpu variable remain in xen-head.S, where:
>
> movq $INIT_PER_CPU_VAR(fixed_percpu_data),%rax
>
> should be changed to use leaq.
>
> All others should then be (%rip)-relative.
>

I mean, the symbols themselves are relative, not absolute?

-hpa