https://bugs.freedesktop.org/show_bug.cgi?id=35268
GitLab Migration User changed:
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Clayton Craft changed:
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--- Comment #30 from Rich Felker ---
Given the lack of response on this issue, I think when I get some time to focus
on it again I'll just prepare a patch removing all of the asm dispatch stubs.
As noted before, they have no benefits at all on x
https://bugs.freedesktop.org/show_bug.cgi?id=35268
--- Comment #29 from Rich Felker ---
It turns out there's more code that needs to be refitted or removed from
src/mapi/entry_*_tls.h, including powerpc64le asm I wasn't aware of before.
There's a lot of code to generate executable stubs at runtim
https://bugs.freedesktop.org/show_bug.cgi?id=35268
--- Comment #28 from Rich Felker ---
Note that removing the asm would also fix sparc, for which I don't feel
qualified to fix the asm. It would also make it possible to support x86 targets
that lack TLSDESC support at the ldso level (maybe some o
https://bugs.freedesktop.org/show_bug.cgi?id=35268
--- Comment #27 from Rich Felker ---
A couple issues with latest patches by Sora Lee:
1. There is no need for __attribute__((__tls_model__("global-dynamic"))). It's
rightly the default whenever it's needed by the ABI. The attribute should just
b
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Sora Lee changed:
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--- Comment #25 from Sora Lee ---
Created attachment 142011
--> https://bugs.freedesktop.org/attachment.cgi?id=142011&action=edit
dlopen_test.c
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Sora Lee changed:
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--- Comment #23 from Sora Lee ---
(In reply to Rich Felker from comment #22)
> Ping.
>
> Looking at this again, I see the original proposed patch introduced a lot of
> extra asm to save/restore registers that might be clobbered by
> __tls_get_ad
https://bugs.freedesktop.org/show_bug.cgi?id=35268
--- Comment #22 from Rich Felker ---
Ping.
Looking at this again, I see the original proposed patch introduced a lot of
extra asm to save/restore registers that might be clobbered by __tls_get_addr.
That could all go away if tlsdesc support is a
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Ross Burton changed:
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--- Comment #21 from
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Timo Teräs changed:
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--- Comment #20 from Rich Felker ---
Update from the musl libc side: we now have TLSDESC support for x86 and x86_64,
so the situation would be much improved (with no performance regression) by
using TLSDESC. Support for TLSDESC on ARM and other a
https://bugs.freedesktop.org/show_bug.cgi?id=35268
Natanael Copa changed:
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Natanael Copa changed:
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--- Comment #17 from Natanael Copa ---
Created attachment 92987
--> https://bugs.freedesktop.org/attachment.cgi?id=92987&action=edit
dso.c
test dso that allocates big enough TLS variable.
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--- Comment #16 from Natanael Copa ---
(In reply to comment #15)
> Note that, at least as I understand
> it, the current approach that "works" with glibc is already fragile; if
> another library with large TLS needs gets loaded via dlopen before
https://bugs.freedesktop.org/show_bug.cgi?id=35268
--- Comment #15 from Rich Felker ---
Hi. I'm the maintainer of musl and I'd like to confirm that we don't have plans
to work around this on our side. musl aims to support extremely minimal thread
stacks if desired by the application, and reservin
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--- Comment #14 from Natanael Copa ---
Created attachment 92977
--> https://bugs.freedesktop.org/attachment.cgi?id=92977&action=edit
Makefile
Makefile for app.c and gltest.c
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--- Comment #13 from Natanael Copa ---
Created attachment 92976
--> https://bugs.freedesktop.org/attachment.cgi?id=92976&action=edit
app.c
app that call gltest() in a dlopened gltest.so
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--- Comment #12 from Natanael Copa ---
Created attachment 92975
--> https://bugs.freedesktop.org/attachment.cgi?id=92975&action=edit
gltest.c
testcase. To reproduce, dlopen ./gltest.so and call gltest().
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--- Comment #11 from Natanael Copa ---
(In reply to comment #10)
> Nowadays nVidia- and AMD-supplied libGL.so's use initial-exec TLS as well
> (at least on 32-bit x86).
the closed source libGL.sos are linked to GNU libc and is not really expecte
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Alexander Monakov changed:
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--- Comment #10 f
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--- Comment #9 from Natanael Copa ---
I don't think musl libc intend to implement the special handling for mesa as
described in
http://www.redhat.com/archives/phil-list/2003-February/msg00077.html
I think they intend to implement gnu2 tls dialec
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Natanael Copa changed:
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Resolution|NOTOURBUG
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Fabio Pedretti changed:
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--- Comment #7 from Fabio Pedretti 2012-03-30 03:05:21
PDT ---
This patch was dropped in Ubuntu: "no longer needed, now breaks things":
http://anonscm.debian.org/gitweb/?p=pkg-xorg/lib/mesa.git;a=commitdiff;h=5ba285e9ca2f6f6d8baba231c80dcd41c2f9
https://bugs.freedesktop.org/show_bug.cgi?id=35268
--- Comment #6 from Nicholas Miell 2011-09-20 15:15:58 PDT
---
Also, the test case is wrong, the main executable is compiled PIC for no reason
and the shared object is compiled without PIC, which barely works on i386 and
won't even link on AMD64
https://bugs.freedesktop.org/show_bug.cgi?id=35268
--- Comment #5 from Nicholas Miell 2011-09-20 14:15:18 PDT
---
Mesa is explicitly allowed to use intial-exec, even when dlopen()ed.
See: http://www.redhat.com/archives/phil-list/2003-February/msg00077.html
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--- Comment #4 from Julien Cristau 2011-04-26 14:36:31
PDT ---
> --- Comment #3 from Tom Fogal 2011-04-26 10:25:37 PDT
> ---
> Is there hand-coded asm for other architectures (i.e. not just x86[-64]) as
> well? I have not checked. However, I
https://bugs.freedesktop.org/show_bug.cgi?id=35268
--- Comment #3 from Tom Fogal 2011-04-26 10:25:37 PDT
---
It looks like init_glapi_relocs is an empty function after this patch. Can it
just be removed, then?
Is there hand-coded asm for other architectures (i.e. not just x86[-64]) as
well? I
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Christopher James Halse Rogers changed:
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--- Comment #1 from Christopher James Halse Rogers
2011-03-13 05:00:28 PDT ---
Created an attachment (id=44412)
View: https://bugs.freedesktop.org/attachment.cgi?id=44412
Review: https://bugs.freedesktop.org/review?bug=35268&attachment=44412
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