Re: [PATCH 5/5] add setting gs/fsbase

[Sergey Bugaev]

On Thu, Apr 20, 2023 at 2:56 PM Samuel Thibault <samuel.thibault@gnu.org> wrote:
>
> Hello,
>
> Sergey Bugaev, le jeu. 20 avril 2023 14:51:04 +0300, a ecrit:
> > Why was this not an issue for us on i386?
>
> See 56010b73e81e2cb1082e418699f98353598fe671 and its __mig_memcpy.

Interesting; but that one's dealing with the SHARED case, isn't it? In
my case everything's statically linked so circular relocations between
libc and lib*user aren't an issue; but on the other hand we need to
run __thread_set_state (and other MIG routines) super early, unlike in
SHARED.

> > VM_MAX_USER_ADDRESS, which is defined to VM_MAX_ADDRESS, which is then
> > defined to 0xc0000000, same as on i386. That's of course too small.
> > Can we bump this substantially?
>
> Of course !

Let me actually try doing #define VM_MAX_ADDRESS KENEL_MAP_BASE...

Sergey