Re: Patch for ppc _SDA_BASE_ value

[Momchil Velikov <velco at fadata dot bg>]

Ian Lance Taylor wrote:
> 
>    Date: Thu, 23 Mar 2000 00:45:10 +0200
>    From: Momchil Velikov <velco@fadata.bg>
> 
>    +  /* Make sure _SDA_BASE_ and _SDA2_BASE_ are at offset <= 32768 from the
>    +     beginning of the respective output section.  */
> 
> That isn't the right check, though.  What you really want to ensure is
> that _SDA_BASE_ (_SDA2_BASE_) is at an offset <= 32768 from the start
> of where the .sdata (.sdata2) section is in the output file.
> 
> Consider
>     .data : { *(.data) *(.sdata) *(.sdata2) }
> where the input .data sections are larger than 65536 bytes in total.

I see. How about adding a call to a new backend function, say 
something like find_suitable_defaults_for_special_symbols(),
in elf_bfd_final_link(), somewhere before the loop which calls
elf_link_input_bfd(), which function in the PPC case would
traverse all the .sdata sections in all the input bfd's,
get the range [first small data item address, last small data item
address]
and put _SDA_BASE_ somewhere in between ?

Regards,
-velco