From: Bean <bean123ch@gmail.com>
To: "The development of GRUB 2" <grub-devel@gnu.org>
Subject: Re: Failed to build grub2
Date: Thu, 27 Dec 2007 18:43:22 +0800 [thread overview]
Message-ID: <ca0f59980712270243o7a7381cdl7ec9e27256e7a9fc@mail.gmail.com> (raw)
In-Reply-To: <20071227095705.GA30225@thorin>
On Dec 27, 2007 5:57 PM, Robert Millan <rmh@aybabtu.com> wrote:
> Why not force it with .code32 / .code16 ?
No, you can't use .code32/.code16, it will not cause compile error,
but the machine code is wrong. However, you can write it like this:
.byte 0x66, 0x67
.code32
leal 0x200 + data_start - data_next(%ebx,%eax), %eax
.code16
0x66 and 0x67 is the DATA32 and ADDR32 prefix, it tell the cpu that
the next instruction use different registry and address mode. (16-bit
%ax -> 32-bit %eax, 16-bit address mode to 32-bit address mode).
--
Bean
next prev parent reply other threads:[~2007-12-27 10:43 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-12-25 9:41 Failed to build grub2 Francis Gendreau
2007-12-25 11:07 ` Robert Millan
2007-12-25 11:23 ` Francis Gendreau
2007-12-25 11:37 ` Bean
2007-12-26 7:17 ` Robert Millan
2007-12-26 11:13 ` Bean
2007-12-27 9:57 ` Robert Millan
2007-12-27 10:43 ` Bean [this message]
2007-12-27 11:00 ` Robert Millan
2007-12-27 11:07 ` Bean
2007-12-26 7:15 ` Robert Millan
2007-12-27 6:40 ` Francis Gendreau
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