[patch] SPU gprof support

[Jeff Johnston]

Patch applied.

-- Jeff J.

Ken Werner wrote:
> Hi,
>
> this patch adds initial support for the GNU profiler on the SPU. The flat 
> profile is based on a histogram that is created using the sampling mechanism 
> provided by spu_timer.h (http://sourceware.org/ml/newlib/2008/msg00316.html). 
> For the call graph the compiler generates a particular prologue that causes 
> every function to call _mcount. The call graph is stored in PPU memory using 
> the named address space support 
> (http://sourceware.org/ml/newlib/2008/msg00600.html).
>
> Ken
>
> libgloss/ChangeLog:
>
> 2008-11-26  Ken Werner  <ken.werner@de.ibm.com
>
>         * spu/crt0.S: Call __monstartup if profiling is enabled.
>         * spu/Makefile.in: Add gcrt1.o gcrt2.o.
>
> newlib/ChangeLog:
>
> 2008-11-26  Ken Werner  <ken.werner@de.ibm.com>
>
>         * libc/machine/spu/Makefile.am: Add spu-mcount.S spu-gmon.c.
>         * libc/machine/spu/spu-gmon.c: New file.
>         * libc/machine/spu/spu-mcount.S: New file.
>