Re: more on proff crash building native

["Michael L. Hitch" <mhitch%lightning.msu.montana.edu@localhost>]

On Sat, 7 Feb 2009, Brad Parker wrote:

> der Mouse wrote:
> > > [T]he real problem has to do with the code in libm.so
> > > (__libm_dsqrt_r5) doing a rsb with the stack wrong.  Basically the 2
> > > double args (4 words) are still on the stack.
>
> I should have checked this earlier.  This diff is interesting.
>
> --- /mwave/files1/netbsd/NetBSD-3/src/lib/libm/arch/vax/n_sqrt.S        2004-05\
> -13 16:35:40.000000000 -0400
> +++ /mwave/files1/netbsd/NetBSD-5_beta/src/lib/libm/arch/vax/n_sqrt.S   2007-04\
> -18 00:46:13.000000000 -0400
> @@ -1,4 +1,4 @@
> -/*     $NetBSD: n_sqrt.S,v 1.7 2004/05/13 20:35:40 mhitch Exp $        */
> +/*     $NetBSD: n_sqrt.S,v 1.8 2007/04/18 04:46:13 matt Exp $  */

  The commit message is also interesting:

Make the internal __libm_dsqrt_r6 have a fake entry mask of 0 to make 
ld.elf_so.

  I can't interpret the gimplish - it could be to make ld.elf_so work, or
could be to make ld.elf_so happy, or something else.  [And I presume that
should have been __libm_dsqrt_r5 rather than __libm_dsqrt_r6.]

--
Michael L. Hitch                        mhitch%montana.edu@localhost
Computer Consultant
Information Technology Center
Montana State University        Bozeman, MT     USA