Messages in this thread | | | From | Andy Lutomirski <> | Date | Tue, 6 Jan 2015 10:06:16 -0800 | Subject | Re: [PATCH 3.19 3/3] x86, mpx: Change the MPX enable/disable API to arch_prctl |
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On Tue, Jan 6, 2015 at 9:48 AM, Dave Hansen <dave.hansen@linux.intel.com> wrote: > On 01/05/2015 09:59 PM, Andy Lutomirski wrote: >> But I decided to check whether libmpx links against glibc, and I can't >> find sources for it at all. Do they exist? Is there any code with >> source available that invokes this prctl? >> >> If not, I personally have very little sympathy for the argument that a >> binary buried in the depths of the Intel SDE would need to change if >> we switched to using arch_prctl. And I think that it should issue the >> syscall itself without using glibc, in which case the syscall wrapper >> issue is moot. > > Andy, as I mentioned previously, there is code in a GCC branch that uses > the existing prctl(). It's also been posted for review to one of the > GCC mailing lists. I've been told that it will be in gcc 5.0. >
Can you point me to it? I found the code generation stuff in the gcc branch, but I couldn't find the runtime.
> The Intel SDE does not use the prctl() in any way that I know of.
I found a couple references suggesting that libmpx lived in the SDE. For example:
https://software.intel.com/en-us/articles/using-intel-mpx-with-the-intel-software-development-emulator
--Andy
-- Andy Lutomirski AMA Capital Management, LLC
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