uClibc Blackfin patches 1/N

[Bernd Schmidt]

I'm working towards making the current svn head uClibc usable for the 
Blackfin.  This is going to require a number of ldso patches.  I've 
first updated our local version so that I have a working up-to-date 
version of ld.so with FD-PIC patches, and I'll submit those patches in 
small pieces.  All the initial hard work of implementing this stuff was 
of course done by Alex Oliva.

This first patch introduces a new macro, DL_CALL_FUNC_AT_ADDR, which is 
used instead of making calls through function pointers.

Other parts of this patch:
  - a few errors in the DL_RELOC_ADDR conversion are fixed
  - a few minor formatting fixes
  - in dl-startup.c, there's a bug introduced in revision 10060 when 
code was added to adjust things like tpnt->dynamic_info[DT_JMPREL] by 
the load address early - we now add the load address twice when 
computing rpnt.  Apparently, as the comment in that function states, the 
loop is indeed a no-op on most architectures, but it isn't on the Blackfin.


Bernd
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