[lkml]   [2010]   [Jun]   [30]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [GIT PULL] x86 breakpoint regression fix
On Wed, Jun 30, 2010 at 03:40:51PM +0100, Maciej W. Rozycki wrote:
> On Wed, 30 Jun 2010, Frederic Weisbecker wrote:
> > - icebp/int01 trap. This instruction (0xf1) is undocumented and
> > generates an int 1 exception. Unlike single step through TF
> > flag, it doesn't set the single step origin of the exception
> > in dr6.
> Not quite completely undocumented, but a bit obscure indeed. GDB calls
> this instruction ICEBP and some Intel sources -- INT1. It's been around
> for a while (at least since 80286) and is mostly used by in-circuit
> emulators (hence the name GDB uses).

Right, in fact it was quite easy to find any documentation about it, it's
just officially undocumented.

 \ /
  Last update: 2010-06-30 21:07    [W:0.059 / U:3.736 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site