Re: [PATCH 00/10] Control Flow Enforcement - Part (3)

[Yu-cheng Yu <yu-cheng.yu@intel.com>]

On Tue, 2018-06-12 at 20:56 +1000, Balbir Singh wrote:
> 
> On 08/06/18 00:37, Yu-cheng Yu wrote:
> > This series introduces CET - Shadow stack
> > 
> > At the high level, shadow stack is:
> > 
> > 	Allocated from a task's address space with vm_flags VM_SHSTK;
> > 	Its PTEs must be read-only and dirty;
> > 	Fixed sized, but the default size can be changed by sys admin.
> > 
> > For a forked child, the shadow stack is duplicated when the next
> > shadow stack access takes place.
> > 
> > For a pthread child, a new shadow stack is allocated.
> > 
> > The signal handler uses the same shadow stack as the main program.
> > 
> 
> Even with sigaltstack()?
> 
> 
> Balbir Singh.

Yes.