strace for powerpc

[Arun Sharma]

Arun Sharma wrote:
> 
> I needed to apply this patch to ports/devel/strace (please review)
> 
> http://www.sharma-home.net/people/arun/misc/strace-powerpc.patch
> 
> and symlink freebsd/i386 to freebsd/powerpc (perhaps the directory 
> should be renamed?) to build.
> 
>

Couple of things that I noticed aren't working well:

- when a system call fails, the return value and the error code are wrong.

- I'm not sure if frame.lr is the equivalent of regs.r_eip on i386. From 
the powerpc manuals, it looks like SRR0 contains the address where the 
syscall would return to.

	-Arun