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Re: bndmov MPX instructions in dynamic linker breaks valgrind
- From: Roland McGrath <roland at hack dot frob dot com>
- To: Markus Trippelsdorf <markus at trippelsdorf dot de>
- Cc: libc-alpha at sourceware dot org, Igor Zamyatin <igor dot zamyatin at intel dot com>
- Date: Wed, 6 Aug 2014 15:35:15 -0700 (PDT)
- Subject: Re: bndmov MPX instructions in dynamic linker breaks valgrind
- Authentication-results: sourceware.org; auth=none
- References: <20140802175103 dot GC294 at x4> <20140806211851 dot D3F5A2C3983 at topped-with-meat dot com> <20140806223112 dot GA296 at x4>
> Since Intel's 14 nm process isn't working as expected, there's no
> shipping MPX capable processor in sight yet. So it wouldn't hurt anyone
> if MPX support would be disabled for another release or two.
There are pretty long lead times for most users to actually get a system
with a new libc on it. So it would be a mistake to think that the first
libc release after a piece of hardware actually ships is early enough for
every user (or even most users) buying the new hardware to wind up running
a system with the new libc.