Sender:	root AT delorie DOT com
Message-ID:	<3783503F.7BDFDA54@inti.gov.ar>
Date:	Wed, 07 Jul 1999 10:04:00 -0300
From:	salvador <salvador AT inti DOT gov DOT ar>
Organization:	INTI
X-Mailer:	Mozilla 4.6 [en] (X11; I; Linux 2.0.36 i686)
X-Accept-Language:	es-AR, en, es
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To:	Eli Zaretskii <eliz AT is DOT elta DOT co DOT il>
CC:	djgpp-workers AT delorie DOT com, Robert Hoehne <robert DOT hoehne AT gmx DOT net>
Subject:	Re: .align directives in libc.a
References:	<Pine DOT SUN DOT 3 DOT 91 DOT 990707151220 DOT 2851C-100000 AT is>
Reply-To:	djgpp-workers AT delorie DOT com

Eli Zaretskii wrote:

> On Tue, 6 Jul 1999, salvador wrote:
>
> > > The alignment pseudo-ops allow to define the value of the byte with
> > > which to pad.  Thus, ".p2align 3,0xcc" should pad to 8-byte boundary
> > > with Int 3 instructions.
> > >
> > > But why is this a good idea?
> >
> > To trap jumps in this space.
>
> Isn't some invalid opcode (that would cause SIGILL) better?  Int 3
> might have a confusing effect inside a debugger, whereas SIGILL will
> be unambiguous.

Yes, but it should be one byte.

SET

--
Salvador Eduardo Tropea (SET). (Electronics Engineer)
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