From: m_hrebien@wp.pl
To: linux-assembly@vger.kernel.org
Subject: Re: gas' nop(s)
Date: Tue, 06 Aug 2002 11:30:56 +0200 [thread overview]
Message-ID: <3D4F9750.328C98B1@wp.pl> (raw)
In-Reply-To: 20020805222102.193b66fc.lx@lxhp.in-berlin.de
h-peter recktenwald wrote:
>
> > .text
> >
> > .align 1
> >
> > .globl _start
> > _start:
> > mov $1,%eax
> > xor %ebx,%ebx
> > int $0x80
> >
>
> echo ".att_syntax noprefix;.global XLAB;jnc XLAB;movl eax,ebx;\
> movl ebx,edx;XLAB:;.end"|as -achnlsd m=l --gstabs |tee t
>
> the listing:
> ----------------------------------------------------
> 1 0000 0F83FCFF .att_syntax noprefix
> 1 FFFF89C3
> 1 89DA89F6
> DEFINED SYMBOLS
> {standard input}:1 .text:0000000a XLAB
>
> NO UNDEFINED SYMBOLS
> --------------------------------------------------
> asm 4 bytes shorter w/o the ".global" statement, <jnc> then w. byte disp.
Yes, right! But it still adds "89F6" padding which stands for "mov
%esi,%esi" & my question was how to avoid this.
--
Maciej Hrebien
next prev parent reply other threads:[~2002-08-06 9:30 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-08-04 20:28 gas' nop(s) m_hrebien
[not found] ` <20020805091651.245c7d4b.jani@iv.ro>
2002-08-05 9:23 ` m_hrebien
2002-08-05 10:20 ` h-peter recktenwald
2002-08-05 17:53 ` m_hrebien
2002-08-05 22:21 ` h-peter recktenwald
2002-08-06 9:30 ` m_hrebien [this message]
2002-08-07 7:41 ` h-peter recktenwald
2002-08-08 15:50 ` h-peter recktenwald
2002-08-09 16:07 ` h-peter recktenwald
2002-08-09 19:47 ` Maciej Hrebien
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