orphan sections to .data and .bss output sections, not just .text.
When giving up on finding a suitable output section, attach to any
output section other than .MMIX.reg_contents, if it exists.
* scripttempl/mmo.sc: Move output debug sections to just before
.MMIX.reg_contents. Add .gnu.attributes. Add new . = . NOP
assignments and move end-of-section provide-symbols after them
to force the end-of-section symbols to the address after orphan
placement. Add SORT_NONE to .init and .fini sections.
the new $RELOCATEABLE_OUTPUT_FORMAT, if set.
(OUTPUT_FORMAT): Use the variable $OUTPUT_FORMAT.
(ENTRY): Don't emit for relocateable links.
(/DISCARD/): Don't discard .gnu.warning.* for relocateable links.
* emulparams/mmo.sh (RELOCATEABLE_OUTPUT_FORMAT): Set, to
elf64-mmix.
* emulparams/elf64mmix.sh (OTHER_TEXT_SECTIONS): Empty, don't
provide "Main" or set "_start.", for relocateable links.
relaxation always; don't exclude relocatable linking. Adjust for
_bfd_mmix_prepare_linker_allocated_gregs renamed to
_bfd_mmix_before_linker_allocation.
(mmix_after_allocation): Adjust for
_bfd_mmix_finalize_linker_allocated_gregs renamed to
_bfd_mmix_after_linker_allocation.
* scripttempl/mmo.sc: Use ADDR (.text), not . - SIZEOF (.text).
R_MMIX_BASE_PLUS_OFFSET relocs.
* emultempl/mmix-elfnmmo.em (mmix_after_allocation): Rename from
mmix_set_reg_section_vma. Call
_bfd_mmix_finalize_linker_allocated_gregs.
(mmix_before_allocation): New function.
(LDEMUL_AFTER_ALLOCATION): Set to mmix_after_allocation.
(LDEMUL_BEFORE_ALLOCATION): Define to mmix_before_allocation.
* scripttempl/mmo.sc (.text): Mark .init, .fini as KEEP.
(.MMIX.reg_contents): Add .MMIX.reg_contents.linker_allocated
before .MMIX.reg_contents.
* emultempl/mmo.em (gldmmo_before_allocation): Define to default.
(mmo_after_open): New function.
(LDEMUL_AFTER_OPEN): Define to mmo_after_open.
* emulparams/elf64mmix.sh (OTHER_SECTIONS): Tweak formatting. Add
.MMIX.reg_contents.linker_allocated before .MMIX.reg_contents.
