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-[[!meta copyright="Copyright © 2011, 2012, 2013 Free Software Foundation,
-Inc."]]
-
-[[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable
-id="license" text="Permission is granted to copy, distribute and/or modify this
-document under the terms of the GNU Free Documentation License, Version 1.2 or
-any later version published by the Free Software Foundation; with no Invariant
-Sections, no Front-Cover Texts, and no Back-Cover Texts.  A copy of the license
-is included in the section entitled [[GNU Free Documentation
-License|/fdl]]."]]"""]]
-
-[[!tag open_issue_glibc open_issue_libpthread]]
-
-# To Do
-
-  * Discuss d2431f633e6139a62e1575ec18830f7e81160cf0 with Samuel.
-
-  * Validate our implementation against
-    <https://sourceware.org/glibc/wiki/TLSandSignals>.
-
-
-# Documentation
-
-[[!taglink open_issue_documentation]]
-
-  * IRC, freenode, #hurd, 2011-11-26
-
-        <tschwinge> In glibc multiarch support (strcasecmp for i686 SSE3, etc.)
-          there is access to memory via gs: -- this will need to be changed for
-          us, right?
-        <youpi> depends on the access
-        <tschwinge>       * `optimized strcasecmp and strncasecmp for x86-32`
-          (multiarch),
-        <tschwinge>         76e3966e9efc3808a9e7ad09121c5dfc1211c20b +
-        <tschwinge>         6abf346582ba678f4850a88b4a5950593841df1d +
-        <tschwinge>         5583a0862cf94f71cbcde91c4043a20af65facca.  `gs`
-          access.
-        <youpi> +       movl    __libc_tsd_LOCALE@GOTNTPOFF(%ebx), %eax
-        <youpi> that's handled by the linker fine
-        <youpi> it's only the things held in the tcb_t structure which can pose
-          problem
-        <tschwinge> tcbhead_t?
-        <tschwinge> I'm looking at this.
-        <tschwinge> So, at gs:0, there is the TCB.
-        <tschwinge> And we have the same layout as NPTL/Linux, just that we
-          don't have as much data there as they have.
-        <tschwinge> We're missing multiple_threads, sysinfo, sttack_guard,
-          pointer_guard, gscope_flag, private_futex, __private_tm[5].
-        <tschwinge> So, if one of these is referenced (be it my name or by
-          numeric offset), this is invalid for us.
-        <tschwinge> Anything else should work equivalently.
-        <youpi> yes
-        <youpi> usually the only numeric offset being used is 0
-        <youpi> so it would simply not build
-        <tschwinge> And the other offsers are generated via tcb-offsets.sym.
-        <tschwinge> glibc's elf/stackguard-macros.h is wrong for us (but not
-          used anywhere apart from elf/tst-stackguard1.c, I think).
-
-After commit a9538892adfbb9f092e0bb14ff3a1703973968af, it's
-`sysdeps/i386/stackguard-macros.h`; problem remains.
-
-        <tschwinge> __thread __locale_t __libc_tsd_LOCALE = &_nl_global_locale;
-          -- this means that a __libc_tsd_LOCALE values will be in the TLS
-          segment, and this is what is being accessed from the assembler code
-          with %gs:__libc_tsd_LOCALE@NTPOFF, and the linker will resolve this.
-        <youpi> yes
-        <youpi> see in the nm output, the libc_tsd symbols
-        <youpi> these provide the offsets
-        <tschwinge> youpi: Thank you, I'm now understanding this part of TLS
-          much better.
-        <youpi> have you had a look at the tls.pdf from Uli ?
-        <youpi> all the gory details are there :)
-
-Commit c61b4d41c9647a54a329aa021341c0eb032b793e, [[!sourceware_PR 15754]], adds
-`sysdeps/i386/stackguard-macros.h:POINTER_CHK_GUARD`, which is not correct for
-us (at the moment), but it also shouldn't cause any harm, as this file is only
-used in `elf/tst-ptrguard1.c` and `elf/tst-stackguard1.c`, which now will fail
-to build for us, as we don't have a `pointer_guard` member in
-`sysdeps/mach/hurd/tls.h:tcbhead_t`.
-
-We don't define `THREAD_SET_POINTER_GUARD`.