use a five instruction sequence for funtion calls which are out of
range of the bal instruction.
* libecoff.h (struct ecoff_section_tdata): Define.
(ecoff_section_data): Define.
(ecoff_bfd_relax_section): Don't define.
* ecoff.c (ecoff_final_link_debug_accumulate): Don't read or free
the debugging information if it has already been read.
(ecoff_indirect_link_order): Handle _cooked_size being different
from _raw_size. Don't reread the contents or the relocs if they
have already been read in.
* coff-mips.c (mips_howto_table): Change bitsize of PCREL16 from
18 to 16.
(PCREL16_EXPANSION_ADJUSTMENT): Define.
(mips_relocate_refhi): Take adjust argument.
(mips_relocate_section): Handle reloc offsets stored in section
used_by_bfd field. Call mips_relax_pcrel16 to handle details of
expanding an out of range PCREL16. Keep trace of adjustments
required by expansions. Set s and unset h when converting a reloc
from undefined to section. Change handling of PC relative relocs:
if against a section, they are correct in the object file, if
against an external symbol they are pcrel_offset.
(mips_relax_section): New function.
(mips_relax_pcrel16): New function.
(ecoff_bfd_relax_section): Define.
* coff-alpha.c (ecoff_bfd_relax_section): Define.
* ecofflink.c (bfd_ecoff_debug_accumulate): Handle adjustments
built by mips_relax_section when writing out addresses.
* elf32-mips.c (mips_elf_read_ecoff_info): Clear adjust field.
* ecoffswap.h: New file for ECOFF swapping functions which differ
only slightly for different targets.
* libecoff.h: Added prototypes for ecoff.c functions.
(ecoff_backend_data): New structure.
(ecoff_tdata): Added backend_data field. Changed external data
pointers to be PTR rather than to a particular struct.
(ecoff_symbol_struct): Moved in from coff-mips.c.
* coff-alpha.c, coff-mips.c: Moved common functions into ecoff.c.
Added ECOFF backend structures. Include ecoffswap.h.
* coff-msym.c: Removed; superseded by ecoffswap.h.
* bfd.c: Include coff/internal.h.
* Makefile.in (BFD_LIBS): Removed coff-mips.o and coff-msym.o.
Added ecoff.o.
(BFD64_BACKENDS): Added coff-alpha.o.
(CFILES): Removed coff-msym.c. Added ecoff.c.
(bfd.o): Added dependency on $(INCDIR)/coff/sym.h.
(coff-mips.o): Added dependency on ecoffswap.h and coff/ecoff.h.
(ecoff.o, coff-alpha.o): New targets.
(coff-msym.o): Removed target.
