cvs commit: src/share/mk src/sys/conf files src/sys/dev/aic7xxx/aicasm Makefile

David O'Brien obrien at
Wed Mar 17 16:22:17 PST 2004

On Mon, Mar 15, 2004 at 06:03:24PM +0100, Alexander Leidinger wrote:
> > >   Problems with icc v8:
> > >    - panic: npx0 cannot be emulated on an SMP system
> > >    - UP: first start of /bin/sh results in a FP exception
> > 
> > You forgot the other problems with icc v8 -- Intel's preditorial
> > behavior.  Note that some parts of the Intel compilers support libs do a
> > CPUID call and if it notes an AMD CPU either segfaults or dumbs down the
> > capabilities of the CPU to that of the original i386.
>  - only if the compiled binary contains the main function
>    (the kernel doesn't)
>  - only if you use a specific compiler option, which I don't use here

It happens in several circumstances, not just when using one particular
compiler option.
> To circumvent this I suggest to read
> BTW.: AFAIK it doesn't segfault, it exit()s.

BTW, icc v8 produced binaries will sometimes segfault on AMD processors.
Trust me, AMD has tested this issue more than you have.
> Any manufacturer is free to limit the use of his programs as he wants. I
> agree, this behavior isn't nice, but life isn't nice either (sometimes).

Then I'd like to take the stance of reanble the blind use of EFER.NXE in
the FreeBSD/amd64 loader -- Intel ia32e can just add that feature.

-- David  (obrien at

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