SymbianOS.
* emulparams/armsymbian.sh (OTHER_READONLY_SECTIONS): Define, so
as to include .ARM.exidx$${Base,Limit}.
* ld/scripttempl/armbpabi.sc: Move .plt to end of text segment.
Define IMAGE$$ER_RO$${Base,Limit} and SHT$$INIT_ARRAY$${Base,Limit}.
Put .init_array, .fini_array, etc. into the read-only data
segment.
* ldexp.h (segment_type): New type.
(segments): New variable.
* ldexp.c (segments): New variable.
(exp_print_token): Handle SEGMENT_START.
(fold_binary): Likewise.
* ldgram.y (SEGMENT_START): Declare it as a token.
(exp): Handle SEGMENT_START.
* ldlang.h (lang_address_statement_type): Add segment field.
(lang_section_start): Change prototype.
* ldlang.c (map_input_to_output_sections): Do not process section
assignments if a corresponding SEGMENT_START has already been
seen.
(lang_section_start): Add segment parameter.
* ldlex.l (SEGMENT_START): Add it.
* lexsup.c (seg_segment_start): New function.
(parse_args): Use it for -Tbss, -Tdata, and -Ttext.
* ld.texinfo (SEGMENT_START): Document it.
* emulparams/armsymbian.sh (EMBEDDED): Set it.
* scripttempl/armbpabi.sc: Use SEGMENT_START to control segment
base addresses. Do not map relocations.
* NEWS: Mention SEGMENT_START.
* elf.c (_bfd_elf_make_dynamic_segment): New function, split out
from ...
(map_sections_to_segments): ... here. Use it. Assign a file
position to the .dynamic section if it is not loadable, but part
of the PT_DYNAMIC segment.
* elf32-arm.h (elf32_arm_finish_dynamic_sections): Use file
offsets, not VMAs, for the BPABI. Do not fill in the header in
the .got.plt section for the BPABI.
* elfarm-nabi.c (elf32_arm_symbian_modify_segment_map): Add a
PT_DYNAMIC segment.
(elf_backend_want_got_plt): Define to zero for Symbian OS.
* emulparams/armsymbian.sh: Use armbpabi script.
* scripttempl/armbpabi.sc: New script.
