* dw2gencfi.c (dwcfi_seg_list): New struct.

	(dwcfi_hash): New static hash variable.
	(get_debugseg_name): New.
	(alloc_debugseg_item): New.
	(make_debug_seg): New.
	(dwcfi_hash_insert): New.
	(dwcfi_hash_find): New.
	(dwcfi_hash_find_or_make): New.
	(cfi_insn_data): New member cur_seg.
	(cie_entry): Likewise.
	(fde_entry): New cseg and handled members.
	(alloc_fde_entry): Initialize cseg member.
	(alloc_cfi_insn_data): Initialize cur_seg member.
	(dot_cfi_sections): Compare for beginning of
	section names via strncmp.
	(get_cfi_seg): New.
	(cfi_finish): Treat link-once sections.
	(is_now_linkonce_segment): New local helper.
	(output_cie): Ignore cie entries not member of current
	segment.
	(output_fde): Likewise.
	(select_cie_for_fde): Likewise.
	(cfi_change_reg_numbers): Add new argument for current segment
	and ignore insn elements, if not part of current segment.
	* ehopt.c (get_cie_info): Use strncmp for
	section name matching.
	(heck_eh_frame): Likewise.

	* coffcode.h (sec_to_styp_flags): Allow linkonce for
	debugging sections.

	* scripttempl/pe.sc: Handle .eh_frame($|.)* sections.
	* scripttempl/pep.sc: Likewise.

	* ld-pe/pe.exp: Add cfi/cfi32 tests.
	* ld-pe/cfi.d: New.
	* ld-pe/cfi32.d: New.
	* ld-pe/cfia.s: New.
	* ld-pe/cfib.s: New.

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