RFC: Rewrite copy_private_bfd_data in elf.c

[Nick Clifton]

Hi H. J.

> I'd like to clean up copy_private_bfd_data in elf.c. It is supposed
> to copy ELF program header. But it checks p_paddr in ELF progam header,
> which isn't specified by ELF specification at all

Actually it is specified:

   p_paddr     On systems for which physical addressing is relevant,
               this member is reserved for the segment's physical
               address. This member requires operating system specific
               information, which is described in the appendix at the
               end of Book III.

> and messs around progam header. I'd like to rewrite 
 > copy_private_bfd_data to handle copying ELF program header properly.
> It will

> 1. Copy the entire ELF program header if none of the sections
> referenced by program header is removed. It won't change the order
> of segments nor merge them.

What about if sections have been added ?  Or if the size of any of the 
sections has changed ?  Or their load/run addresses have been changed ? 
  Or their attributes ?

Cheers
   Nick