Re: [PATCH v2 0/7] linkage: better symbol aliasing

Ard Biesheuvel
2022-01-25T15:32:38Z

On Tue, 25 Jan 2022 at 12:32, Mark Rutland <mark.rutland@arm.com> wrote:
>
> This series aims to make symbol aliasing simpler and more consistent.
> The basic idea is to replace SYM_FUNC_START_ALIAS(alias) and
> SYM_FUNC_END_ALIAS(alias) with a new SYM_FUNC_ALIAS(alias, name), so
> that e.g.
>
> SYM_FUNC_START(func)
> SYM_FUNC_START_ALIAS(alias1)
> SYM_FUNC_START_ALIAS(alias2)
> ... asm insns ...
> SYM_FUNC_END(func)
> SYM_FUNC_END_ALIAS(alias1)
> SYM_FUNC_END_ALIAS(alias2)
> EXPORT_SYMBOL(alias1)
> EXPORT_SYMBOL(alias2)
>
> ... can become:
>
> SYM_FUNC_START(name)
> ... asm insns ...
> SYM_FUNC_END(name)
>
> SYM_FUNC_ALIAS(alias1, func)
> EXPORT_SYMBOL(alias1)
>
> SYM_FUNC_ALIAS(alias2, func)
> EXPORT_SYMBOL(alias2)
>
> This avoids repetition and hopefully make it easier to ensure
> consistency (e.g. so each function has a single canonical name and
> associated metadata).
>

I take it this affects the sizes of the alias ELF symbols? Does that matter?