On Tue, 11 Nov 2014, Andi Kleen wrote: > On Tue, Nov 11, 2014 at 01:04:42PM -0800, H.J. Lu wrote: > > On Tue, Nov 11, 2014 at 1:01 PM, Andi Kleen <a...@firstfloor.org> wrote: > > >> It is similar to libsanitizer. Put it in glibc isn't going to work well > > >> for MPX. > > > > > > Can you explain it more please? > > > > > > > Are you suggesting putting MPX run-time in glibc? Will we have > > 2 glibc, one with MPX run-time and one without MPX run-time? > > No, I just think signal chaining should be in glibc.
I do wonder whether the signal handler needs to be enabled by default or whether there should simply be a function __mpx_handle_sigsegv provided with instructions to the user on how it can be used to get extra MPX-related information when SIGSEGV occurs (in which case it's entirely the user's responsibility to write a handler calling their own handler and the MPX one, if desired). Or an LD_PRELOAD library like libSegFault. -- Joseph S. Myers jos...@codesourcery.com
