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Date: Fri, 20 Dec 2002 11:08:17 -0500
From: Daniel Jacobowitz <dan@debian.org>
To: Jakub Jelinek <jakub@redhat.com>
Cc: Roland McGrath <roland@redhat.com>, linux-kernel@vger.kernel.org,
       Ingo Molnar <mingo@redhat.com>
Subject: Re: PTRACE_GET_THREAD_AREA
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	Roland McGrath <roland@redhat.com>, linux-kernel@vger.kernel.org,
	Ingo Molnar <mingo@redhat.com>
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On Fri, Dec 20, 2002 at 10:55:16AM -0500, Jakub Jelinek wrote:
> On Fri, Dec 20, 2002 at 10:48:29AM -0500, Daniel Jacobowitz wrote:
> > Eventually most or all targets will have thread-specific data
> > implemented; I don't want to have to redo this for each one.
> 
> Well, but on most arches you don't need any kernel support for TLS.
> On sparc32/sparc64/IA-64/s390/s390x and others you simply have one
> general register reserved for it by the ABI, on Alpha you use a PAL
> call.
> set_thread_area/get_thread_area is IA-32/x86-64 specific.

Oh, right, I guess we won't need anything if it's just in a register :)
Architecture-specific it is, then.  For Alpha (and probably MIPS) we
can add a ptrace equivalent of the trap to fetch the pointer.  Patch
looks fine to me.

-- 
Daniel Jacobowitz
MontaVista Software                         Debian GNU/Linux Developer
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