Re: [RFC/PATCH] x86_64 port (attempt 2)

["Hans Kester" <kester dot hans at gmail dot com>]

Ping!

The GCC mainline now has support for x86_64-elf. Mainline does not
build for any of our targets at the moment, but that will be fixed
when 4.3 is released.

If this port can be committed we should have a working toolchain in
the end (binutils/gcc/newlib).

Hans Kester


On 8/22/07, Hans Kester <kester.hans@gmail.com> wrote:
> On 8/21/07, Jeff Johnston <jjohnstn@redhat.com> wrote:
> >   Is anyone pursuing the gcc patch you mentioned?  That patch is pretty
> > old (dated March 2005).
>
> Yes, I have already sent a new patch last week
> (http://gcc.gnu.org/ml/gcc-patches/2007-08/msg00936.html). It hasn't
> been reviewed yet, I will ping them soon. Mark Mitchel told me to give
> it a week. Binutils was fixed long ago.
>
> >   I would have assumed in your patch that you would keep/reuse use some
> > of the i386 assembler routines that you didn't have specific
> > replacements for.  For example, you don't have a libm_machine_dir which
> > implements the fast math library routines.  You also don't have some
> > other string routines that are implemented in libc/machine/i386.  Is
> > there some reason you decided not to do this?
>
> Basically I implemented the functions that we needed to be fast:
> memcpy and memset. I think some evolution is needed here: when we or
> anyone else needs a faster string or math function it will need to be
> implemented. I might take a look at the string and math functions when
> I have more time. For the moment this can be a nice starting point.
>
> >   Any requirement for x86_64 libgloss (cygmon)?
>
> Same story here: we don't need it at the moment. Perhaps we or someone
> else can dive into this later.
>
> >   I noted a typo in setjmp.h for the __x86_64__ flag (missing a
> > trailing underscore).
>
> You are right. That would make
>
> Index: newlib/libc/include/machine/setjmp.h
> ===================================================================
> RCS file: /cvs/src/src/newlib/libc/include/machine/setjmp.h,v
> retrieving revision 1.32
> diff -u -r1.32 setjmp.h
> --- newlib/libc/include/machine/setjmp.h        18 Dec 2006 16:48:03 -00001.32
> +++ newlib/libc/include/machine/setjmp.h        15 Aug 2007 08:57:54 -0000
> @@ -67,6 +67,11 @@
>  #endif
>  #endif
>
> +#ifdef __x86_64__
> +#define _JBTYPE long long
> +#define _JBLEN  8
> +#endif
> +
>  #ifdef __i960__
>  #define _JBLEN 35
>  #endif
>