lkml.org 
[lkml]   [2024]   [Jan]   [21]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
SubjectRe: [PATCH 1/2] x86: Remove dynamic NOP selection
From
On 1/20/24 08:53, Thorsten Glaser wrote:
> H. Peter Anvin dixit:
>
>> %eiz was something that binutils used to put in when disassembling
>> certain redundant encodings with SIB at some point.
>
> Ah, fair enough. Maybe this could be added as one more line in
> the comment or something.
>

I think "proper" gas syntax would be 0(%esi,,1), although that doesn't
assemble either (I don't believe there is a way to get gas to actually
generate this sequence.)

But yes, with all even remotely recent CPUs all actually handling nopl
properly, this isn't relevant anymore.

-hpa


\
 
 \ /
  Last update: 2024-01-22 00:22    [W:0.082 / U:2.344 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site