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To: Andrew Cagney <ac131313@redhat.com>
cc: Richard.Earnshaw@arm.com, Kris Warkentin <kewarken@qnx.com>,
        gdb-patches@sources.redhat.com
Reply-To: Richard.Earnshaw@arm.com
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Subject: Re: [rfa?] Add frame_align(); Was: ARM stack alignment on hand 
 called functions
In-reply-to: Your message of "Wed, 27 Nov 2002 13:43:13 EST."
             <3DE51241.9040104@redhat.com> 
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Date: Thu, 28 Nov 2002 01:26:00 -0000
From: Richard Earnshaw <rearnsha@arm.com>
X-SW-Source: 2002-11/txt/msg00706.txt.bz2


> +/* Ensure that the ARM's stack pointer has the correct alignment for a
> +   new frame.  */
> +static CORE_ADDR
> +arm_frame_align (struct gdbarch *gdbarch, CORE_ADDR addr)
> +{
> +  return (addr & -16);
> +}

Yuck, two's complement assumption.  I much prefer ~0xf in this case.

But why so much.  The maximum stack alignment you'll see on an ARM is 8 
bytes.

R.