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To: Richard.Earnshaw@arm.com
Cc: gdb-patches@sources.redhat.com
Subject: Re: [rfa?] Add frame_align(); Was: ARM stack alignment on hand 
 called functions
References: <200211280926.gAS9QJE06150@pc960.cambridge.arm.com>
X-Yow: Could I have a drug overdose?
From: Andreas Schwab <schwab@suse.de>
Date: Thu, 28 Nov 2002 02:20:00 -0000
In-Reply-To: <200211280926.gAS9QJE06150@pc960.cambridge.arm.com> (Richard
 Earnshaw's message of "Thu, 28 Nov 2002 09:26:19 +0000")
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Richard Earnshaw <rearnsha@arm.com> writes:

|> > +/* 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.

No, -16 is implicitly cast to bfd_vma, which is unsigned, and this
operation is completely defined independent of the representation of
signed integers.

Andreas.

-- 
Andreas Schwab, SuSE Labs, schwab@suse.de
SuSE Linux AG, Deutschherrnstr. 15-19, D-90429 Nürnberg
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