* elf-bfd.h (struct elf_backend_data): Add
elf_backend_modify_program_headers.
* elfxx-target.h (elf_backend_modify_program_headers): Define.
(elfNN_bed): Init new field.
* elf.c (elf_modify_segment_map): Remove comment.
(assign_file_positions_for_load_sections): Only call
elf_modify_segment_map for objcopy/strip.
(assign_file_positions_except_relocs): Call
elf_backend_modify_program_headers.
* elf32-frv.c (elf32_frvfdpic_always_size_sections): Don't make
.stack section.
(elf32_frvfdpic_modify_segment_map): Delete.
(elf32_frvfdpic_modify_program_headers): New.
(elf_backend_modify_segment_map): Don't define.
(elf_backend_modify_program_headers): Define.
* elf32-bfin.c (elf32_bfinfdpic_always_size_sections): Don't make
.stack section.
(elf32_bfinfdpic_modify_segment_map): Delete.
(elf32_bfinfdpic_modify_program_headers): New.
(elf_backend_modify_segment_map): Don't define.
(elf_backend_modify_program_headers): Define.
* elfxx-ia64.c (elfNN_ia64_modify_program_headers): New function.
Split out from..
(elfNN_ia64_modify_segment_map): ..here.
(elf_backend_modify_program_headers): Define.