Re: [VERY RFC PATCH 2/2] hurd: Make it possible to call memcpy very early

[Sergey Bugaev]

On Fri, Apr 21, 2023 at 2:50 PM Adhemerval Zanella Netto
<adhemerval.zanella@linaro.org> wrote:
> It might work if you don't care about a different architecture than x86,
> and that's why I added the alias (so each architecture is free to name
> its ifunc variant).  And the patch was exactly to handle the implicit
> created mem* call from compiler, so I think you should take it in
> consideration.

Yes, sure, I wasn't really suggesting we do that change. My point is,
I would like to make the same memcpy callsites both work during early
startup and start calling the more efficient implementation once early
startup is done -- if that's possible.

> And I trying to make reason why you need __mig_memcpy indirection for
> MIG.

See commit 56010b73e81e2cb1082e418699f98353598fe671 (as pointed out by
Samuel yesterday), which references [0]. But that's only relevant for
SHARED; for static we could avoid that redirection and call memcpy
directly indeed.

[0]: https://sourceware.org/pipermail/libc-alpha/2020-November/119575.html

Sergey