[PATCH] hp-timing for ppc32/64

[Steve Munroe]

Benjamin Herrenschmidt <benh@kernel.crashing.org> wrote on 11/14/2005 
03:32:16 PM:

> 
> > The whole idea of hp-timing is that is fast, simple, and inline code. 
It 
> > is not a general purpose clock. It must also work in the restricted 
> > environment of the dynamic loader itself, like before and the durring 
the 
> > time the loader is relocating its self!
> 
> AT_HWCAP is available at all time since it's passed by the kernel
> 
AT_HWCAP is but dl_hwcap is not. The loader has to complete relocating 
itself before it can call the functions the set up dl_hwcap etc 
(dl_sysdep_start). Looking at the code it seems the HP_TIMING_NOW() is 
being used very early in rtld.c (dl_start and dl_start_final), as far as I 
can tell dl_hwcap is not available until the middle of dl_start_final(), 
well after HP_TIMING needs to be functional. 

Steven J. Munroe
Linux on Power Toolchain Architect
IBM Corporation, Linux Technology Center