Intel® Memory Protection Extensions support in the GCC

Intel® Memory Protection Extensions support in the GCC

[Zamyatin, Igor]

Hi All!

This is to let you know that enabling of Intel® MPX technology (see details in http://download-software.intel.com/sites/default/files/319433-015.pdf) in GCC has been started. (Corresponding changes in binutils are here - http://sourceware.org/ml/binutils/2013-07/msg00233.html)

Currently compiler changes for Intel® MPX has been put in the branch svn://gcc.gnu.org/svn/gcc/branches/mpx (will soon be reflected in svn.html). 
Ilya Enkovich (in cc) will be the main person maintaining this branch and submitting changes into the trunk.

Some implementation details could be found on wiki

Thanks,
Igor 

Re: Intel® Memory Protection Extensions support in the GCC

[Florian Weimer]

On 07/24/2013 05:58 PM, Zamyatin, Igor wrote:
> Hi All!
>
> This is to let you know that enabling of Intel® MPX technology (see details in http://download-software.intel.com/sites/default/files/319433-015.pdf) in GCC has been started. (Corresponding changes in binutils are here - http://sourceware.org/ml/binutils/2013-07/msg00233.html)

Thanks, this is interesting.

Can userspace update the translation tables for bounds?  Are the bounds 
stored in Bound Table Entries relative to the starting linear address of 
pointer (LAp) or absolute?  The former would allow sharing bound table 
pages for different pages having memory objects of the same size (which 
happens with some malloc implementations).


-- 
Florian Weimer / Red Hat Product Security Team