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Re: FLOATING_STACKS

From: Daniel Jacobowitz <drow at false dot org>
To: Will Newton <will dot newton at gmail dot com>
Cc: libc-ports at sourceware dot org
Date: Mon, 8 May 2006 10:05:36 -0400
Subject: Re: FLOATING_STACKS
References: <87a5b0800605080229j3738c7c3t1781c0a41c0094cd@mail.gmail.com> <20060508132825.GA3589@nevyn.them.org> <87a5b0800605080701n5dcd66cfw22e3938468ffa883@mail.gmail.com>

On Mon, May 08, 2006 at 03:01:52PM +0100, Will Newton wrote:
> >For instance, if there's a dedicated register in which you can record
> >the thread pointer, then you can use this.
> 
> What are the ideal requirements of such a register? Reserved in the
> ABI? Our ABI is still tentatively open to modification so this may be
> a future possibility.

Yes.  For instance, PowerPC 32-bit and PowerPC 64-bit both reserve a
GPR for this.  Some other ABIs use special registers (e.g. x86 segment
registers, ARM coprocessor registers).

-- 
Daniel Jacobowitz
CodeSourcery

References:
- FLOATING_STACKS
  - From: Will Newton
- Re: FLOATING_STACKS
  - From: Daniel Jacobowitz
- Re: FLOATING_STACKS
  - From: Will Newton

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