From: Sergey Bugaev <bugaevc@gmail.com>
To: Samuel Thibault <samuel.thibault@gnu.org>
Cc: Adhemerval Zanella Netto <adhemerval.zanella@linaro.org>,
"H.J. Lu" <hjl.tools@gmail.com>,
libc-alpha@sourceware.org, bug-hurd@gnu.org,
Luca <luca@orpolo.org>
Subject: Re: [VERY RFC PATCH 2/2] hurd: Make it possible to call memcpy very early
Date: Sat, 22 Apr 2023 15:18:08 +0300 [thread overview]
Message-ID: <CAN9u=HeFeDedCsrLXyt0HfTetK5LWcODM9X-=vVboYFEj4FyYQ@mail.gmail.com> (raw)
In-Reply-To: <20230422115921.24upng76tpj2ymb3@begin>
On Sat, Apr 22, 2023 at 2:59 PM Samuel Thibault <samuel.thibault@gnu.org> wrote:
> Perhaps we can generate "init" variants of the RPCs that we need at
> initialization, that are made to use the base memcpy implementation, and
> only use them in the init code?
If we undo 56010b73e81e2cb1082e418699f98353598fe671 for static builds
(basically stick && defined (SHARED) in there) and apply Adhemerval's
suggestion, we might even get away without compiling separate init
versions. We should only need to de-ifunc-ify init-first.c,
thread_set_state, hurdstartup.c, and exec_startup_get_info. If they
all go through __mig_memcpy which is in a separate translation unit,
we'd have to make __mig_memcpy slow for everyone; but if they call
memcpy directly, we can selectively make only those ones use the slow
memcpy.
What do you think?
Sergey
next prev parent reply other threads:[~2023-04-22 12:18 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-04-20 18:42 [PATCH 1/2] hurd: Don't migrate reply port into __init1_tcbhead Sergey Bugaev
2023-04-20 18:42 ` [VERY RFC PATCH 2/2] hurd: Make it possible to call memcpy very early Sergey Bugaev
2023-04-20 20:25 ` H.J. Lu
2023-04-20 20:38 ` Adhemerval Zanella Netto
2023-04-21 9:27 ` Sergey Bugaev
2023-04-21 11:50 ` Adhemerval Zanella Netto
2023-04-21 12:38 ` Sergey Bugaev
2023-04-21 12:58 ` Adhemerval Zanella Netto
2023-04-21 13:56 ` Sergey Bugaev
2023-04-21 14:28 ` Adhemerval Zanella Netto
2023-04-22 11:59 ` Samuel Thibault
2023-04-22 12:18 ` Sergey Bugaev [this message]
2023-04-22 16:20 ` Samuel Thibault
2023-04-22 17:04 ` Sergey Bugaev
2023-04-21 11:51 ` Sergey Bugaev
2023-04-21 1:02 ` [PATCH 1/2] hurd: Don't migrate reply port into __init1_tcbhead Samuel Thibault
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