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    • Catherine Moore's avatar
      Compact EH Support · 2f0c68f2
      Catherine Moore authored
      The specification for the Compact EH format is available at:
      https://github.com/MentorEmbedded/cxx-abi/blob/master/MIPSCompactEH.pdf
      
      2015-05-28  Catherine Moore  <clm@codesourcery.com>
      	    Bernd Schmidt <bernds@codesourcery.com>
      	    Paul Brook <paul@codesourcery.com>
      
      	bfd/
      	* bfd-in2.h: Regenerated.
      	* elf-bfd.h (DWARF2_EH_HDR, COMPACT_EH_HDR): Define.
      	(COMPACT_EH_CANT_UNWIND_OPCODE): Define.
      	(dwarf_eh_frame_hdr_info): Move dwarf-specific fields from
      	eh_frame_hdr_info.
      	(compact_eh_frame_hdr_info): Declare.
      	(eh_frame_hdr_info):  Redeclare with union for dwarf-specific
      	fields and compact-eh fields.
      	(elf_backend_data): Add cant_unwind_opcode and compact_eh_encoding.
      	(bfd_elf_section_data): Add eh_frame_entry_field.
      	(elf_section_eh_frame_entry): Define.
      	(bfd_elf_parse_eh_frame_entries): Declare.
      	(_bfd_elf_parse_eh_frame_entry): Declare.
      	(_bfd_elf_end_eh_frame_parsing): Declare.
      	(_bfd_elf_write_section_eh_frame_entry): Declare.
      	(_bfd_elf_eh_frame_entry_present): Declare.
      	(_bfd_elf_section_for_symbol): Declare.
      	* elf-eh-frame.c (bfd_elf_discard_eh_frame_entry): New function.
      	(bfd_elf_record_eh_frame_entry): New function.
      	(_bfd_elf_parse_eh_frame_entry): New function.
      	(_bfd_elf_parse_eh_frame): Update hdr_info field references.
      	(cmp_eh_frame_hdr): New function.
      	(add_eh_frame_hdr_terminator): New function.
      	(_bfd_elf_end_eh_frame_parsing): New function.
      	(find_merged_cie): Update hdr_info field references.
      	(_bfd_elf_discard_section_eh_frame): Likewise.
      	(_bfd_elf_discard_section_eh_frame_hdr): Add Compact EH support.
      	(_bfd_elf_eh_frame_entry_present): New function.
      	(_bfd_elf_maybe_strip_eh_frame_hdr): Add Compact EH support.
      	(_bfd_elf_write_section_eh_frame_entry): New function.
      	(_bfd_elf_write_section_eh_frame): Update hdr_info field references.
      	(_bfd_elf_fixup_eh_frame_hdr): New function.
      	(write_compact_eh_frame_hdr): New function.
      	(write_dwarf_eh_frame_hdr): New function.
      	(_bfd_elf_write_section_eh_frame_hdr): Add Compact EH support.
      	* elflink.c (_bfd_elf_section_for_symbol): New function.
      	(elf_section_ignore_discarded_relocs): Add Compact EH support.
      	(elf_link_input_bfd): Likewise.
      	(bfd_elf_final_link): Likewise.
      	(_bfd_elf_gc_mark): Likewise.
      	(bfd_elf_parse_eh_frame_entries): New function.
      	(bfd_elf_gc_sections): Add Compact EH support.
      	(bfd_elf_discard_info): Likewise.
      	* elfxx-mips.c: Include dwarf2.h.
      	(_bfd_mips_elf_compact_eh_encoding): New function.
      	(_bfd_mips_elf_cant_unwind_opcode): New function.
      	* elfxx-mips.h (_bfd_mips_elf_compact_eh_encoding): Declare.
      	(_bfd_mips_elf_cant_unwind_opcode): Declare.
      	(elf_backend_compact_eh_encoding): Define.
      	(elf_backend_cant_unwind_opcode): Define.
      	* elfxx-target.h (elf_backend_compact_eh_encoding): Provide default.
      	(elf_backend_cant_unwind_opcode): Provide default.
      	(elf_backend_data elfNN_bed): Add elf_backend_compact_eh_encoding and
      	elf_backend_cant_unwind_opcode.
      	* section.c (SEC_INFO_TYPE_EH_FRAME_ENTRY): Add definition.
      
      	gas/
      	* config/tc-alpha.c (all_cfi_sections): Declare.
      	(s_alpha_ent): Initialize all_cfi_sections.
      	(alpha_elf_md_end): Invoke cfi_set_sections.
      	* config/tc-mips.c (md_apply_fix):  Handle BFD_RELOC_NONE.
      	(s_ehword): Use BFD_RELOC_32_PCREL.
      	(mips_fix_adjustable): Handle BFD_RELOC_32_PCREL.
      	(mips_cfi_reloc_for_encoding): New function.
      	* tc-mips.h (DWARF2_FDE_RELOC_SIZE): Redefine.
      	(DWARF2_FDE_RELOC_ENCODING): Define.
      	(tc_cfi_reloc_for_encoding): Define.
      	(mips_cfi_reloc_for_encoding): Define.
      	(tc_compact_eh_opcode_stop): Define.
      	(tc_compact_eh_opcode_pad): Define.
      	* doc/as.texinfo: Document Compact EH extensions.
      	* doc/internals.texi: Likewise.
      	* dw2gencfi.c (EH_FRAME_LINKONCE): Redefine.
      	(tc_cfi_reloc_for_encoding): Provide default.
      	(compact_eh): Declare.
      	(emit_expr_encoded): New function.
      	(get_debugseg_name): Add Compact EH support.
      	(alloc_debugseg_item): Likewise.
      	(cfi_set_sections): New function.
      	(dot_cfi_fde_data): New function.
      	(dot_cfi_personality_id): New function.
      	(dot_cfi_inline_lsda): New function.
      	(cfi_pseudo_table): Add cfi_fde_data, cfi_personality_id,
      	and cfi_inline_lsda.
      	(dot_cfi_personality): Add Compact EH support.
      	(dot_cfi_lsda): Likewise.
      	(dot_cfi_sections): Likewise.
      	(dot_cfi_startproc): Likewise.
      	(get_cfi_seg): Likewise.
      	(output_compact_unwind_data): New function.
      	(output_cfi_insn): Add Compact EH support.
      	(output_cie): Likewise.
      	(output_fde): Likewise.
      	(cfi_finish): Likewise.
      	(cfi_emit_eh_header): New function.
      	(output_eh_header): New function.
      	* dw2gencfi.h (cfi_set_sections): Declare.
      	(SUPPORT_COMPACT_EH): Define.
      	(MULTIPLE_FRAME_SECTIONS): Define.
      	New enumeration to describe the Compact EH header format.
      	(fde_entry): Add new fields personality_id, eh_header_type, eh_data_size,
      	eh_data, eh_loc and sections.
      	(CFI_EMIT_eh_frame, CFI_EMIT_debug_frame, CFI_EMIT_target,
      	CFI_EMIT_eh_frame_compact): Define.
      
      2015-05-22  Catherine Moore  <clm@codesourcery.com>
      	    Bernd Schmidt <bernds@codesourcery.com>
      
      	gas/testsuite/
      	* gas/mips/mips.exp: Run new tests.
      
      	* gas/mips/compact-eh-1.s: New file.
      	* gas/mips/compact-eh-2.s: New file.
      	* gas/mips/compact-eh-3.s: New file.
      	* gas/mips/compact-eh-4.s: New file.
      	* gas/mips/compact-eh-5.s: New file.
      	* gas/mips/compact-eh-6.s: New file.
      	* gas/mips/compact-eh-7.s: New file.
      	* gas/mips/compact-eh-eb-1.d: New file.
      	* gas/mips/compact-eh-eb-2.d: New file.
      	* gas/mips/compact-eh-eb-3.d: New file.
      	* gas/mips/compact-eh-eb-4.d: New file.
      	* gas/mips/compact-eh-eb-5.d: New file.
      	* gas/mips/compact-eh-eb-6.d: New file.
      	* gas/mips/compact-eh-eb-7.d: New file.
      	* gas/mips/compact-eh-el-1.d: New file.
      	* gas/mips/compact-eh-el-2.d: New file.
      	* gas/mips/compact-eh-el-3.d: New file.
      	* gas/mips/compact-eh-el-4.d: New file.
      	* gas/mips/compact-eh-el-5.d: New file.
      	* gas/mips/compact-eh-el-6.d: New file.
      	* gas/mips/compact-eh-el-7.d: New file.
      	* gas/mips/compact-eh-err1.l: New file.
      	* gas/mips/compact-eh-err1.s: New file.
      	* gas/mips/compact-eh-err2.l: New file.
      	* gas/mips/compact-eh-err2.s: New file.
      
      2015-05-22  Catherine Moore  <clm@codesourcery.com>
      
      	include/
      	* bfdlink.h: Rename eh_frame_hdr to eh_frame_hdr_type.
      
      2015-05-22  Catherine Moore  <clm@codesourcery.com>
      	    Paul Brook <paul@codesourcery.com>
      
      	ld/
      	* emultempl/elf32.em (gld${EMULATION_NAME}_after_open):
      	Add Compact EH support.
      	* scripttempl/elf.sc: Handle .eh_frame_entry and .gnu_extab
      	sections.
      
      2015-05-22  Catherine Moore  <clm@codesourcery.com>
      
      	ld/testsuite/
      	* ld-mips-elf/compact-eh.ld: New linker script.
      	* ld-mips-elf/compact-eh1.d: New.
      	* ld-mips-elf/compact-eh1.s: New.
      	* ld-mips-elf/compact-eh1a.s: New.
      	* ld-mips-elf/compact-eh1b.s: New.
      	* ld-mips-elf/compact-eh2.d: New.
      	* ld-mips-elf/compact-eh2.s: New.
      	* ld-mips-elf/compact-eh3.d: New.
      	* ld-mips-elf/compact-eh3.s: New.
      	* ld-mips-elf/compact-eh3a.s: New.
      	* ld-mips-elf/compact-eh4.d: New.
      	* ld-mips-elf/compact-eh5.d: New.
      	* ld-mips-elf/compact-eh6.d: New.
      	* ld-mips-elf/mips-elf.exp: Run new tests.
      2f0c68f2