lkml.org 
[lkml]   [2004]   [Jul]   [1]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] restore floppy boot image


Randy.Dunlap wrote:
> On Wed, 30 Jun 2004 17:52:30 -0400 (EDT) Joshua wrote:
>
> | Thanks for the time in reading the patch.
> |
> | Hmm. pop %ax after the jmp is a clear bug. Must have been a zero
> | on the stack when I tested it. <g>
> |
> | For the clobbering of al just before kernel entry, that is badly arranged
> | code although it doesn't matter (mov $0, %al turns out to be no-op).
>
> No-op should be some form/variant of xchg %ax,%ax
> (not mov to %al -- the latter needs to do something.)

He didn't mean it was a "nop". He meant that the operation had no
effect because moving zero to a register which already contains zero
accomplishes nothing.

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 14:04    [W:0.046 / U:0.020 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site