coff section flags: STYP_COPY, in particular, for TI COFF files

[John E Hein]

I am looking into supporting the TMS320C6x
(c6x-tools.sourceforge.net), and I've found that the COFF files
generated by TI's compiler (Code Composer Studio) include some
sections flagged by STYP_COPY.

This is not handled in bfd/coffcode.h

Sections flagged by STYP_COPY are to be relocated and loaded, but not
allocated.  For instance, there's a .vers section that has section
flags 0x50 (STYP_COPY | STYP_DATA).  binutils marks these with
SEC_LOAD & SEC_ALLOC (loaded & allocated).

In recent TI tools (CCS 2.20), there's another section ($BRID) which
has the same problem.

Note that the c54x support that is now included in binutils has the
same flaw.

There are also problems with STYP_DSECT (not handled by binutils in
sec_to_styp_flags()) and also with STYP_PAD (should be loaded, but not
marked by binutils with SEC_LOAD).  But I haven't seen a COFF file
generated by the TI tools that have the STYP_DSECT nor STYP_PAD flags
set (yet).

Attached is a patch.  Comments?


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