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Re: [PATCH v2 02/14] arm: Introduce and use NEGOFF series of macros

From: "Joseph S. Myers" <joseph at codesourcery dot com>
To: Richard Henderson <rth at twiddle dot net>
Cc: <libc-ports at sourceware dot org>
Date: Tue, 5 Mar 2013 01:42:24 +0000
Subject: Re: [PATCH v2 02/14] arm: Introduce and use NEGOFF series of macros
References: <1362159320-5934-1-git-send-email-rth@twiddle.net> <1362159320-5934-3-git-send-email-rth@twiddle.net>

On Fri, 1 Mar 2013, Richard Henderson wrote:

> There are several places in which we access negative offsets from
> the thread-pointer, but thumb2 only supports positive offsets in
> memory references.
> 
> Avoid duplicating the rather large macros in which these references
> are embedded by abstracting out the operation.
> ---
>         * sysdeps/arm/sysdep.h (NEGOFF_ADJ_BASE): New macro.
>         (NEGOFF_ADJ_BASE2, NEGOFF_OFF1, NEGOFF_OFF2): New macros.
>         * sysdeps/unix/sysv/linux/arm/clone.S (__clone): Use them.
>         * sysdeps/unix/sysv/linux/arm/nptl/vfork.S: Likewise.
>         * sysdeps/unix/sysv/linux/arm/nptl/pt-vfork.S: Likewise.
>         * sysdeps/unix/sysv/linux/arm/nptl/sysdep-cancel.h (SINGLE_THREAD_P):
>         Likewise.

OK.

-- 
Joseph S. Myers
joseph@codesourcery.com

References:
- [PATCH v2 00/14] ARM improvements
  - From: Richard Henderson
- [PATCH v2 02/14] arm: Introduce and use NEGOFF series of macros
  - From: Richard Henderson

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