On 01/06/2015 10:06 AM, Andy Lutomirski wrote: > On Tue, Jan 6, 2015 at 9:48 AM, Dave Hansen <dave.han...@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.
cc'ing Ilya who is working on the gcc parts... Ilya, is the MPX runtime that uses the prctl() calls available somewhere publicly that it can be grabbed? I couldn't find it in GCC SVN anywhere. >> 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, I think you're mistaken. The SDE allows you to run MPX code on a system without MPX support in hardware. It does not, itself, provide MPX code. The references you see there are to a runtime library that you obtain separately from the SDE. You run the library _under_ the SDE. I hope this clears things up. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
