lkml.org 
[lkml]   [2014]   [Apr]   [9]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [RFC PATCH 6/6] uprobes/x86: Emulate rip-relative conditional "near" jmp's
On 04/08, Jim Keniston wrote:
>
> On Mon, 2014-04-07 at 16:28 +0200, Oleg Nesterov wrote:
> >
> > It seems that 16bit condi jmp is just 0x0f + short_jump_opc_plus_0x10.
>
> Yes, but the code could use a comment to that effect. See below.

OK, will do.

> Searching for "jump" in the AMD manual, I see that there are 3 other
> instructions that are essentially conditional branches: loop,
> loope/loopz, and loopne/loopnz.

Yes, I know, Denys already informed me privately ;)

> The offset is always 8 bits.

And thus this series can ignore them. But as I already said, I'll try
to support them later just for completeness.

> BTW, patches 2 and 3 look fine to me.

Great!

Thanks again Jim for your helpful review.

Oleg.



\
 
 \ /
  Last update: 2014-04-09 19:21    [W:0.087 / U:0.532 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site