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Re: PowerPC64 TLS ABI

From: Ulrich Drepper <drepper at redhat dot com>
To: Richard Henderson <rth at twiddle dot net>
Cc: binutils at sources dot redhat dot com, libc-alpha at sources dot redhat dot com
Date: Sat, 18 Jan 2003 02:20:39 +0000
Subject: Re: PowerPC64 TLS ABI
Organization: Red Hat, Inc.
References: <20030117093351.GQ943@bubble.sa.bigpond.net.au> <20030117141141.A19217@twiddle.net> <20030118003253.GT943@bubble.sa.bigpond.net.au> <20030117173714.A19461@twiddle.net>

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Richard Henderson wrote:

> At the moment Jakub has arranged for LinuxThreads to
> have its _pthread_descr at the negative offsets from
> the TP.  We can either continue with that (and have to
> use an additional addis to access it), or we can use
> the second word of the TCB to point to it.

Negative offsets seem to be much better.  No sane implementation will
allocate the "TCB" separately from the thread descriptor.  Using
negative offsets saves one indirection.

- -- 
- --------------.                        ,-.            444 Castro Street
Ulrich Drepper \    ,-----------------'   \ Mountain View, CA 94041 USA
Red Hat         `--' drepper at redhat.com `---------------------------
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References:
- PowerPC64 TLS ABI
  - From: Alan Modra
- Re: PowerPC64 TLS ABI
  - From: Richard Henderson
- Re: PowerPC64 TLS ABI
  - From: Alan Modra
- Re: PowerPC64 TLS ABI
  - From: Richard Henderson

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