patch for bfd/dwarf2.c, support for 16-bits addresses in DWARF-2

patch for bfd/dwarf2.c, support for 16-bits addresses in DWARF-2

[Stephane Carrez]

Hi!

The binutils can support 16-bits addresses in DWARF-2 easily.
Only bfd/dwarf2.c needs to be updated. The 'readelf' tool already
supports 16-bits addresses in DWARF-2.

I've checked this with the 68HC11 port which has 16-bits addresses
and uses DWARF-2 for debugging info.

Can you integrate this patch?

Thanks,
        Stephane

1999-09-05  Stephane Carrez  <stcarrez@worldnet.fr>

	* dwarf2.c (parse_comp_unit): Accept addr_size == 2.
	(read_address): Recognize addr_size == 2 for 16-bits targets.

*** gas-i386/binutils/bfd/dwarf2.c	Sun Sep  5 10:53:16 1999
--- cygnus/binutils/bfd/dwarf2.c	Fri Aug  6 21:36:40 1999
*************** read_address (unit, buf)
*** 341,355 ****
    if (unit->addr_size == 4)
      {
        retval = bfd_get_32 (unit->abfd, (bfd_byte *) buf);
!     }
!   else if (unit->addr_size == 8)
!     {
        retval = bfd_get_64 (unit->abfd, (bfd_byte *) buf);
      }
-   else
-     {
-       retval = bfd_get_16 (unit->abfd, (bfd_byte *) buf);
-     }
    return retval;
  }
  
--- 341,349 ----
    if (unit->addr_size == 4)
      {
        retval = bfd_get_32 (unit->abfd, (bfd_byte *) buf);
!     } else {
        retval = bfd_get_64 (unit->abfd, (bfd_byte *) buf);
      }
    return retval;
  }
  
*************** parse_comp_unit (abfd, info_ptr, end_ptr
*** 1283,1291 ****
        return 0;
      }
  
!   if (addr_size != 4 && addr_size != 8 && addr_size != 2)
      {
!       (*_bfd_error_handler) ("Dwarf Error: found address size '%u', this reader can only handle address sizes '2', '4' and '8'.", addr_size );
        bfd_set_error (bfd_error_bad_value);
        return 0;
      }
--- 1277,1285 ----
        return 0;
      }
  
!   if (addr_size != 4 && addr_size != 8)
      {
!       (*_bfd_error_handler) ("Dwarf Error: found address size '%u', this reader can only handle address sizes '4' and '8'.", addr_size );
        bfd_set_error (bfd_error_bad_value);
        return 0;
      }