lkml.org 
[lkml]   [2019]   [Nov]   [5]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Date
SubjectRe: [PATCH v5 11/14] arm64: efi: restore x18 if it was corrupted
On Wed, Nov 6, 2019 at 12:56 AM Sami Tolvanen <samitolvanen@google.com> wrote:
>
> If we detect a corrupted x18 and SCS is enabled, restore the register
> before jumping back to instrumented code. This is safe, because the
> wrapper is called with preemption disabled and a separate shadow stack
> is used for interrupt handling.

In case you do v6: I think putting the explanation about why this is
safe in the existing comment would be best given it is justifying a
subtlety of the code rather than the change itself. Ard?

Cheers,
Miguel

\
 
 \ /
  Last update: 2019-11-06 05:46    [W:0.332 / U:0.076 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site