* config/alpha/alpha.c (alpha_start_function): Use switch_to_section.

	(alpha_elf_select_rtx_section): Return the selected section rather
	than emitting assembly code.
	(alpha_write_linkage): Emit a ".link" directive directly and then
	set in_section to NULL.
	(vms_asm_out_constructor): Use switch_to_section.
	(vms_asm_out_destructor): Likewise.
	(unicosmk_output_common): Set in_section to NULL instead of calling
	the dummy common_section function.
	(unicosmk_text_section): Delete in favor of...
	(unicosmk_output_text_section_asm_op): ...this new function.
	(unicosmk_data_section): Delete in favor of...
	(unicosmk_output_data_section_asm_op): ...this new function.
	(unicosmk_init_sections): New function.
	(unicosmk_output_deferred_case_vectors): Use switch_to_section.
	(unicosmk_output_ssib): Set in_section to NULL instead of calling
	the dummy ssib_section function.
	(unicosmk_section_buf): Delete.
	* config/alpha/alpha-protos.h (unicosmk_text_section): Delete.
	(unicosmk_data_section): Delete.
	* config/alpha/elf.h (ASM_OUTPUT_ALIGNED_LOCAL): Use switch_to_section.
	(EXTRA_SECTIONS, EXTRA_SECTION_FUNCTIONS, sbss_section, sdata_section)
	(SECTION_FUNCTION_TEMPLATE): Delete.
	* config/alpha/unicosmk.h (TEXT_SECTION_ASM_OP, DATA_SECTION_ASM_OP)
	(READONLY_DATA_SECTION, EXTRA_SECTIONS, EXTRA_SECTION_FUNCTIONS)
	(common_section, COMMON_SECTION, ssib_section, SSIB_SECTION): Delete.
	(ASM_OUTPUT_ALIGNED_LOCAL): Use switch_to_section.
	(TARGET_ASM_INIT_SECTIONS): Define.
	* config/alpha/vms.h (LINK_SECTION_ASM_OP, LITERALS_SECTION_ASM_OP)
	(EXTRA_SECTIONS, EXTRA_SECTION_FUNCTIONS): Delete.
	(link_section, literals_section): Delete.
	(ASM_OUTPUT_DEF): Emit the ".literal" directive directly and then
	set in_section to NULL.

	* config/arm/aof.h (TEXT_SECTION_ASM_OP, DATA_SECTION_ASM_OP): Delete.
	(EXTRA_SECTIONS, EXTRA_SECTION_FUNCTIONS, ZERO_INIT_SECTION): Delete.
	(COMMON_SECTION): Delete.
	(TARGET_ASM_INIT_SECTIONS): Define.
	(ASM_OUTPUT_COMMON): Set in_section to NULL rather than calling
	the dummy common_section function.
	* config/arm/aout.h (ASM_OUTPUT_ALIGNED_LOCAL): Use switch_to_section.
	* config/arm/arm.c (get_jump_table_size): Use pointer comparison
	between readonly_data_section and text_section to check whether
	read-only data is being put in the text section.
	(arm_output_function_epilogue): Use switch_to_section.
	(arm_elf_asm_constructor): Likewise.
	(thumb_call_via_reg): Replace call to in_text_section with
	a comparison between in_section and text_section.
	(arm_file_end): Use switch_to_section.
	(aof_text_section): Delete in favor of...
	(aof_output_text_section_asm_op): ...this new function.
	(aof_data_section): Delete in favor of...
	(aof_output_data_section_asm_op): ...this new function.
	(aof_asm_init_sections): New function.
	(zero_init_section): Moved from config/arm/aof.h.
	(aof_dump_imports, aof_file_start): Use switch_to_section.
	* config/arm/arm.h (thumb_call_via_label): Update comment.
	* config/arm/arm-protos.h (aof_text_section, aof_data_section): Delete.
	(common_section): Delete.
	* config/arm/pe.h (ASM_DECLARE_FUNCTION_NAME): Use switch_to_section.
	(ASM_DECLARE_OBJECT_NAME): Update the type of save_section.  Use the
	global switch_to_section function instead of the old port-local one.
	(EXTRA_SECTIONS, EXTRA_SECTION_FUNCTIONS, DRECTVE_SECTION_FUNCTION)
	(SWITCH_TO_SECTION_FUNCTION): Delete.
	(drectve_section): Redefine as a macro.
	* config/arm/unknown-elf.h (ASM_OUTPUT_ALIGNED_BSS):
	(ASM_OUTPUT_ALIGNED_DECL_LOCAL): Use get_named_section and
	switch_to_section.

	* config/avr/avr.c (progmem_section): New variable.
	(avr_output_progmem_section_asm_op): New function.
	(avr_asm_init_sections): New function.
	(avr_output_addr_vec_elt): Use switch_to_section.
	* config/avr/avr.h (progmem_section): Declare.
	(EXTRA_SECTIONS, EXTRA_SECTION_FUNCTIONS): Delete.
	(READONLY_DATA_SECTION): Delete.
	(TARGET_ASM_INIT_SECTIONS): Define.
	(ASM_OUTPUT_CASE_LABEL): Use switch_to_section.
	* config/avr/avr-protos.h (progmem_section): Delete.

	* config/bfin/bfin.h (ASM_OUTPUT_LOCAL): Use switch_to_section.

	* config/c4x/c4x.h (EXTRA_SECTIONS, EXTRA_SECTION_FUNCTIONS)
	(INIT_SECTION_FUNCTION, FINI_SECTION_FUNCTION): Delete.

	* config/darwin-sections.def: New file.
	* config/darwin.c: Define all sections in darwin-sections.def.
	(output_objc_section_asm_op, darwin_init_sections): New functions.
	(machopic_output_indirection): Use switch_to_section.
	(machopic_select_section): Return the selected section rather than
	emitting assembly code.  Replace the static function table with
	inline conditional expressions.  Update the tests of last_text_section
	and move them into the FUNCTION_DECL block.
	(machopic_select_rtx_section): Return the selected section rather than
	emitting assembly code.
	(machopic_asm_out_constructor, machopic_asm_out_destructor)
	(darwin_file_end): Use switch_to_section.
	* config/darwin.h: Use darwin-sections.def to declare sections.
	(INIT_SECTION_ASM_OP): Remove empty definition.
	(HAS_INIT_SECTION): Define this instead.
	(SECTION_FUNCTION, EXTRA_SECTIONS, EXTRA_SECTION_FUNCTIONS): Delete.
	(READONLY_DATA_SECTION, TARGET_ASM_EXCEPTION_SECTION): Delete.
	(TARGET_ASM_EH_FRAME_SECTION): Delete.
	(TARGET_ASM_INIT_SECTIONS): Define.
	* config/darwin-protos.h (darwin_init_sections): Declare.
	(machopic_picsymbol_stub_section, machopic_picsymbol_stub1_section)
	(machopic_symbol_stub_section, machopic_symbol_stub1_section): Delete.
	(machopic_lazy_symbol_ptr_section, machopic_nl_symbol_ptr_section)
	(constructor_section, destructor_section, mod_init_section): Delete.
	(mod_term_section): Delete.
	(darwin_exception_section, darwin_eh_frame_section): Delete.
	(machopic_select_section): Return a section.
	(machopic_select_rtx_section): Likewise.
	(text_coal_section, text_unlikely_section, text_unlikely_coal_section)
	(const_section, const_coal_section, const_data_section): Delete.
	(const_data_coal_section, data_coal_section, cstring_section): Delete.
	(literal4_section, literal8_section, constructor_section): Delete.
	(mod_init_section, mod_term_section, destructor_section): Delete.
	(objc_class_section, objc_meta_class_section, objc_category_section)
	(objc_class_vars_section, objc_instance_vars_section): Delete.
	(objc_cls_meth_section, objc_inst_meth_section): Delete.
	(objc_cat_cls_meth_section, objc_cat_inst_meth_section): Delete.
	(objc_selector_refs_section, objc_selector_fixup_section): Delete.
	(objc_symbols_section, objc_module_info_section): Delete.
	(objc_image_info_section, objc_protocol_section): Delete.
	(objc_string_object_section, objc_constant_string_object_section)
	(objc_class_names_section, objc_meth_var_names_section): Delete.
	(objc_meth_var_types_section, objc_cls_refs_section): Delete.
	(machopic_lazy_symbol_ptr_section, machopic_nl_symbol_ptr_section)
	(machopic_symbol_stub_section, machopic_picsymbol_stub_section)
	(darwin_exception_section, darwin_eh_frame_section): Delete.
	* config/t-darwin (darwin.o): Depend on config/darwin-sections.def.

	* config/frv/frv.c (frv_asm_out_constructor): Use switch_to_section.
	(frv_asm_out_destructor): Likewise.
	* config/frv/frv.h (EXTRA_SECTIONS, EXTRA_SECTION_FUNCTIONS): Delete.
	(SDATA_SECTION_FUNCTION, FIXUP_SECTION_FUNCTION): Delete.
	(ASM_OUTPUT_ALIGNED_DECL_LOCAL): Use switch_to_section and
	get_named_section.
	(ASM_OUTPUT_CASE_LABEL): Use switch_to_section.
	* config/frv/frv-protos.h (fixup_section, sdata_section, sbss_section)
	(data_section): Delete.

	* config/i386/cygming.h (EXTRA_SECTIONS, EXTRA_SECTION_FUNCTIONS)
	(DRECTVE_SECTION_FUNCTION): Delete.
	(drectve_section): Redefine as a macro that sets in_section after
	emitting the directive.
	(SWITCH_TO_SECTION_FUNCTION): Delete.
	* config/i386/darwin.h (ASM_OUTPUT_ALIGN): Replace call to
	in_text_section with comparison between in_section and text_section.
	* config/i386/i386.c (x86_64_elf_select_section): Return the section
	rather than emitting assembly code.  Use get_named_section.
	(x86_output_aligned_bss, ix86_file_end): Use switch_to_section and
	get_named_section.
	(machopic_output_stub): Use switch_to_section.
	* config/i386/nwld.c (nwld_named_section_asm_out_constructor)
	(nwld_named_section_asm_out_destructor): Use get_section and
	switch_to_section.

	* config/ia64/ia64.c (ia64_select_rtx_section): Return the section
	rather than emitting assembly code.
	(ia64_rwreloc_select_section): Likewise.
	(ia64_rwreloc_select_rtx_section): Likewise.
	* config/ia64/ia64-protos.h (sdata_section, sbss_section): Delete.
	* config/ia64/sysv4.h (ASM_OUTPUT_ALIGNED_DECL_LOCAL): Use
	switch_to_section.
	(EXTRA_SECTIONS, EXTRA_SECTION_FUNCTIONS): Delete.
	(SDATA_SECTION_FUNCTION, SBSS_SECTION_FUNCTION): Delete.

	* config/iq2000/iq2000.c (iq2000_select_rtx_section): Return the
	section rather than emitting assembly code.
	(iq2000_select_section): Likewise.
	* config/iq2000/iq2000.h (rdata_section, sdata_section): Delete.
	(sbss_section): Delete.

	* config/m32r/m32r.h (ASM_OUTPUT_ALIGNED_BSS): Use switch_to_section
	and get_named_section.
	* config/m32r/m32r-protos.h (sbss_section, sdata_section): Delete.

	* config/mcore/mcore-elf.h (EXPORTS_SECTION_ASM_OP): Delete.
	(SUBTARGET_EXTRA_SECTIONS, SUBTARGET_EXTRA_SECTION_FUNCTIONS): Delete.
	(EXPORT_SECTION_FUNCTION, SUBTARGET_SWITCH_SECTIONS): Delete.
	(MCORE_EXPORT_NAME): Emit the exports directive directly, then set
	in_section to NULL.
	(ASM_DECLARE_FUNCTION_NAME): Use switch_to_section.
	(ASM_DECLARE_OBJECT_NAME): Update the type of save_section.  Use the
	global switch_to_section function instead of the old port-local one.
	* config/mcore/mcore.h (EXTRA_SECTIONS, EXTRA_SECTION_FUNCTIONS)
	(SWITCH_SECTION_FUNCTION): Delete.
	* config/mcore/mcore-pe.h (SUBTARGET_SWITCH_SECTIONS): Delete.
	(DRECTVE_SECTION_ASM_OP, SUBTARGET_EXTRA_SECTIONS): Delete.
	(SUBTARGET_EXTRA_SECTION_FUNCTIONS, DRECTVE_SECTION_FUNCTION): Delete.
	(MCORE_EXPORT_NAME): Emit ".section .drectve" directly, then set
	in_section to NULL.
	(ASM_DECLARE_OBJECT_NAME): Update the type of save_section.  Use the
	global switch_to_section function instead of the old port-local one.
	(ASM_DECLARE_FUNCTION_NAME): Use switch_to_section.

	* config/mips/mips.c (mips_file_start): Update comment.
	(mips_output_aligned_bss): Use switch_to_section and get_named_section.
	(mips_output_aligned_decl_common): Use switch_to_section.
	(mips_select_rtx_section): Return the section rather than emitting
	assembly code.  Use get_named_section.
	(mips_function_rodata_section: Likewise get_section.
	(build_mips16_function_stub): Use switch_to_section.
	* config/mips/mips.h (ASM_OUTPUT_IDENT): Use switch_to_section.
	(SDATA_SECTION_ASM_OP): Delete.
	* config/mips/vxworks.h (EXTRA_SECTIONS): Delete.
	(EXTRA_SECTION_FUNCTIONS): Delete.

	* config/mmix/mmix.c (mmix_file_start, mmix_file_end)
	(mmix_asm_output_aligned_local): Use switch_to_section.

	* config/pa/pa.c (som_readonly_data_section, som_one_only_data_section)
	(som_one_only_readonly_data_section): New variables.
	(pa_output_function_epilogue): Set in_section to NULL instead of
	calling forget_section.
	(output_deferred_plabels): Use select_section.
	(pa_asm_output_mi_thunk): Likewise.  Set in_section to NULL instead
	of calling forget_section.
	(pa_asm_output_aligned_bss, pa_asm_output_aligned_common)
	(pa_asm_output_aligned_local): Use select_section.
	(som_text_section_asm_op): Delete in favor of...
	(som_output_text_section_asm_op): ...this new function.
	(pa_som_asm_init_sections): New function.
	(pa_select_section): Return the section rather than emitting
	assembly code.
	* config/pa/pa.h (EXTRA_SECTIONS, EXTRA_SECTION_FUNCTIONS): Delete.
	(SOM_READONLY_DATA_SECTION_FUNCTION): Delete.
	(SOM_ONE_ONLY_READONLY_DATA_SECTION_FUNCTION): Delete.
	(SOM_ONE_ONLY_DATA_SECTION_FUNCTION, FORGET_SECTION_FUNCTION): Delete.
	* config/pa/pa-protos.h (som_text_section_asm_op): Delete.
	(som_readonly_data_section, som_one_only_readonly_data_section)
	(som_one_only_data_section, forget_section): Delete.
	* config/pa/som.h (TEXT_SECTION_ASM_OP): Delete.
	(TARGET_ASM_INIT_SECTIONS): Define.
	(READONLY_DATA_SECTION, TARGET_ASM_EXCEPTION_SECTION): Delete.

	* config/rs6000/rs6000.c (read_only_data_section): New variable.
	(private_data_section, read_only_private_data_section): New variables.
	(sdata2_section, toc_section): New variables.
	(rs6000_file_start): Use switch_to_section.
	(rs6000_assemble_integer): Use comparisons against in_section
	instead of calling in_toc_section and in_text_section.  Use
	unlikely_text_section_p.
	(rs6000_elf_output_toc_section_asm_op): New function, derived
	from the old rs6000/sysv4.h toc_section function.
	(rs6000_elf_asm_init_sections): New function.
	(rs6000_elf_select_rtx_section, rs6000_elf_select_section): Return
	the section rather than emitting assembly code.
	(machopic_output_stub): Use switch_to_section.
	(toc_section): Delete dummy function.
	(rs6000_elf_asm_out_constructor, rs6000_elf_asm_out_destructor): Use
	switch_to_section and get_section.
	(rs6000_xcoff_output_readonly_section_asm_op): New function.
	(rs6000_xcoff_output_readwrite_section_asm_op): New function.
	(rs6000_xcoff_output_toc_section_asm_op): New function, derived from
	the old rs6000/xcoff.h toc_section function.
	(rs6000_xcoff_asm_init_sections): New function.
	(rs6000_xcoff_select_section, rs6000_xcoff_select_rtx_section): Return
	the section rather than emitting assembly code.
	(rs6000_xcoff_file_start): Use switch_to_section.
	(rs6000_xcoff_file_end): Likewise.
	* config/rs6000/rs6000-protos.h (toc_section, sdata_section): Delete.
	(sdata2_section, sbss_section, private_data_section): Delete.
	(read_only_data_section, read_only_private_data_section): Delete.
	* config/rs6000/sysv4.h (EXTRA_SECTIONS, EXTRA_SECTION_FUNCTIONS)
	(TOC_SECTION_FUNCTION, SDATA_SECTION_FUNCTION, SDATA2_SECTION_FUNCTION)
	(SBSS_SECTION_FUNCTION, INIT_SECTION_FUNCTION): Delete.
	(FINI_SECTION_FUNCTION): Delete.
	(TARGET_ASM_INIT_SECTIONS): Define.
	(ASM_OUTPUT_ALIGNED_LOCAL): Use switch_to_section.
	* config/rs6000/xcoff.h (EXTRA_SECTIONS, EXTRA_SECTION_FUNCTIONS)
	(READ_ONLY_DATA_SECTION_FUNCTION, PRIVATE_DATA_SECTION_FUNCTION)
	(READ_ONLY_PRIVATE_DATA_SECTION_FUNCTION, TOC_SECTION_FUNCTION)
	(READONLY_DATA_SECTION): Delete.
	(TARGET_ASM_INIT_SECTIONS): Define.
	(ASM_DECLARE_FUNCTION_NAME): Use switch_to_section.  Set in_section
	to NULL rather than no_section.
	(TARGET_ASM_EXCEPTION_SECTION): Delete.

	* config/sh/sh.c (sh_file_start): Use switch_to_section.

	* config/sparc/sparc.c (emit_pic_helper): Use switch_to_section.
	(sparc_output_deferred_case_vectors): Likewise.  Remove argument
	from call to current_function_section.

	* config/stormy16/stormy16.c: Include ggc.h and gt-storm16.h.
	(bss100_section): New variable.
	(xstormy16_asm_output_aligned_common): Use switch_to_section.
	(xstormy16_asm_init_sections): New function.
	(xstormy16_asm_out_destructor, xstormy16_asm_out_constructor): Use
	switch_to_section and get_section.
	(xstormy16_output_addr_vec): Use switch_to_section.  Remove argument
	from calls to current_function_section.
	* config/stormy16/stormy16.h (EXTRA_SECTIONS): Delete.
	(XSTORMY16_SECTION_FUNCTION, EXTRA_SECTION_FUNCTIONS): Delete.
	(TARGET_ASM_INIT_SECTIONS): Define.
	* config/stormy16/stormy16-protos.h (bss100_section): Delete.

	* config/svr3.h (ASM_OUTPUT_LOCAL): Use switch_to_section.
	(EXTRA_SECTIONS, EXTRA_SECTION_FUNCTIONS, INIT_SECTION_FUNCTION)
	(FINI_SECTION_FUNCTION): Delete.

	* config/v850/v850.c: Include gt-v850.h.
	(rosdata_section, rozdata_section, tdata_section, zdata_section)
	(zbss_section): New variables.
	(v850_output_aligned_bss): Use switch_to_section.
	(v850_asm_init_sections): New function.
	(v850_select_section): Return the section rather than emitting
	assembly code.
	* config/v850/v850.h (EXTRA_SECTIONS, EXTRA_SECTION_FUNCTIONS)
	(ZDATA_SECTION_ASM_OP, ZBSS_SECTION_ASM_OP, TDATA_SECTION_ASM_OP)
	(ROSDATA_SECTION_ASM_OP, ROZDATA_SECTION_ASM_OP): Delete.
	(TARGET_ASM_INIT_SECTIONS): Define.
	* config/v850/v850-protos.h (sdata_section, rosdata_section): Delete.
	(sbss_section, tdata_section, zdata_section, rozdata_section): Delete.
	(zbss_section): Delete.

	* config/vax/vaxv.h (ASM_OUTPUT_LOCAL): Use switch_to_section.

	* config/vx-common.h (vxworks_exception_section): Delete.
	(TARGET_ASM_EXCEPTION_SECTION): Delete.

	* config/xtensa/xtensa.c (xtensa_select_rtx_section): Return the
	section rather than emitting assembly code.
	* config/xtensa/xtensa.h (ASM_OUTPUT_POOL_PROLOGUE): Use
	switch_to_section.

	* Makefile.in (GTFILES): Add $(srcdir)/output.h.
	* coretypes.h (section): New union and typedef.
	* dbxout.c (FORCE_TEXT): Use switch_to_section.  Remove argument
	from call to current_function_section.
	(dbxout_function_end, dbxout_init, dbxout_source_file, dbxout_finish)
	(dbxout_symbol_location): Use switch_to_section.
	* dwarf2out.c (named_section_eh_frame_section): Delete, moving
	most of the code into...
	(default_eh_frame_section): ...here.  Return a section.
	(collect2_eh_frame_section): Delete, moving most of the code into..
	(switch_to_eh_frame_section): ...this new function.
	(debug_info_section, debug_abbrev_section, debug_aranges_section)
	(debug_macinfo_section, debug_line_section, debug_loc_section)
	(debug_pubnames_section, debug_str_section, debug_ranges_section): New
	variables.
	(output_call_frame_info): Call switch_to_eh_frame_section instead of
	eh_frame_section.  Use switch_to_section and get_section.
	(dwarf2out_begin_prologue): Use switch_to_section.
	(AT_string_form): Check the flags in debug_str_section instead of
	DEBUG_STR_SECTION_FLAGS.
	(output_comp_unit): Use switch_to_section, get_section, and
	debug_info_section.
	(output_line_info, secname_for_decl): Use unlikely_text_section_p.
	(dwarf2out_begin_block): Use switch_to_section.  Remove argument
	from call to current_function_section.
	(dwarf2out_var_location): Use unlikely_text_section_p.
	(dwarf2out_source_line): Use switch_to_section.  Remove argument
	from call to current_function_section.
	(dwarf2out_start_source_file, dwarf2out_end_source_file)
	(dwarf2out_define, dwarf2out_undef: Use switch_to_section and
	debug_macinfo_section.
	(dwarf2out_init): Initialize the new section variables.  Use them
	instead of calls to named_section_flags.  Use switch_to_section.
	(output_indirect_string): Use switch_to_section and debug_str_section.
	(dwarf2out_finish): Use switch_to_section and the new section
	variables.
	* except.c (default_exception_section): Return the section instead
	of emitting assembly code.
	(output_function_exception_table): Use the global exception_section
	variable instead of the target hook.  Use switch_to_section.  Remove
	argument from call to current_function_section.
	* final.c (HAVE_READONLY_DATA_SECTION): Delete.
	(shorten_branches): Use pointer comparisons to detect whether the
	text section is the same as readonly_data_section.
	(profile_function): Use switch_to_section.  Remove argument from
	call to current_function_section.
	(final_scan_insn): Likewise.  Update use of last_text_section.
	* gengtype.c (open_base_files): Add an include of output.h.
	* output.h (text_section, data_section, readonly_data_section)
	(ctors_section, dtors_section, bss_section, init_section)
	(fini_section, sdata_section): Turn into section pointers.
	(in_text_section, in_unlikely_text_section, exports_section)
	(drectve_section, named_section, mergeable_string_section)
	(last_text_section_name): Delete.
	(default_exception_section, default_eh_frame_section): Return sections.
	(SECTION_DECLARED, SECTION_NAMED): New macros.
	(SECTION_MACH_DEP): Bump value.
	(section_common, named_section, unnamed_section): New structures.
	(unnamed_section_callback): New typedef.
	(section): New union.
	(sbss_section, exception_section, eh_frame_section): New variables.
	(in_section, last_text_section): Turn into section pointers.
	(get_unnamed_section, get_section, get_named_section): New functions.
	(mergeable_constant_section, function_section): Return a section.
	(unlikely_text_section): Likewise.
	(current_function_section): Likewise.  Remove the decl argument.
	(unlikely_text_section_p, switch_to_section): New functions.
	(output_section_asm_op): New function.
	(set_named_section_flags, named_section_flags, named_section_real)
	(named_section_first_declaration): Delete.
	(default_select_section, default_elf_select_section): Return a section.
	(default_elf_select_section_1, default_function_rodata_section)
	(default_no_function_rodata_section, default_select_rtx_section)
	(default_elf_select_rtx_section): Likewise.
	* rtl.h (in_data_section): Delete.
	* sdbout.c (sdbout_one_type): Use switch_to_section.
	* system.h (EXTRA_SECTIONS, EXTRA_SECTION_FUNCTIONS): Poison.
	(READONLY_DATA_SECTION, TARGET_ASM_EXCEPTION_SECTION): Poison.
	(TARGET_ASM_EH_FRAME_SECTION): Poison.
	* target-def.h (TARGET_ASM_INIT_SECTIONS): New macro.
	(TARGET_ASM_EXCEPTION_SECTION, TARGET_ASM_EH_FRAME_SECTION): Delete.
	(TARGET_ASM_OUT): Update after above changes.
	* target.h (init_sections): New hook.
	(exception_section, eh_frame_section): Delete.
	(select_section, select_rtx_section, function_rodata_section): Return
	a section rather than emitting assembly code.
	* varasm.c (text_section, data_section, readonly_data_section)
	(ctors_section, dtors_section, bss_section, init_section)
	(fini_section): Turn into section pointers.
	(sdata_section, sbss_section, exception_section): New variables.
	(eh_frame_section): New variable.
	(in_section): Make global and turn into a section pointer.
	(last_text_section): Turn into a section pointer.
	(unnamed_sections): New variable.
	(in_named_name, last_text_section_name): Delete.
	(EXTRA_SECTION_FUNCTIONS): Delete.
	(in_named_entry): Delete.
	(section_htab): New variable, replacing...
	(in_named_htab): ...this deleted variable.
	(section_entry_eq, section_entry_hash): New functions, based on...
	(in_named_entry_eq, in_named_entry_hash): ...these deleted functions.
	(get_unnamed_section, get_section): New functions.
	(unlikely_text_section): Return a section instead of emitting
	assembly code.
	(in_text_section, in_unlikely_text_section, in_data_section): Delete.
	(get_named_section_flags, named_section_first_declaration): Delete.
	(unlikely_text_section_p): New function.
	(named_section_real, named_section): Delete.
	(get_named_section): New function.
	(asm_output_bss, asm_output_aligned_bss): Use switch_to_section.
	(function_section): Return a section rather than emitting
	assembly code.
	(current_function_section): Likewise.  Remove argument.  Use
	last_text_section if nonnull, otherwise use function_section.
	(default_function_rodata_section): Return a section rather than
	emitting assembly code.  Use get_section.
	(default_no_function_rodata_section): Return a section rather than
	emitting assembly code.
	(variable_section): Use switch_to_section and get_named_section.
	(mergeable_string_section): Return a section rather than emitting
	assembly code.  Use get_section.  Make static.  Don't take special
	countermeasures for empty strings.
	(mergeable_constant_section): Return a section rather than emitting
	assembly code.  Use get_section.
	(default_named_section_asm_out_destructor): Use switch_to_section
	and get_section.
	(default_dtor_section_asm_out_destructor): Use switch_to_section.
	(default_named_section_asm_out_constructor): Use switch_to_section
	and get_section.
	(default_ctor_section_asm_out_constructor): Use switch_to_section.
	(assemble_start_function): Likewise.  Set last_text_section to
	NULL rather than no_section.  Change the type of save_section.
	(assemble_zeros, assemble_variable): Use the section flags to detect
	whether or not a section is text.
	(assemble_static_space): Use switch_to_section.
	(assemble_trampoline_template): Likewise.
	(output_constant_def_contents): Use switch_to_section and
	get_named_section.
	(output_constant_pool_1): Use switch_to_section.  Use the section
	flags to see whether sections contain mergeable data.
	(init_varasm_once): Initialize section_htab instead of in_named_htab.
	Initialize new section variables.  Call TARGET_ASM_INIT_SECTIONS.
	(default_elf_asm_named_section): Use SECTION_DECLARED to detect
	whether a section has already been declared.
	(default_select_section, default_elf_select_section): Return a
	section rather than emitting assembly code.
	(default_elf_select_section_1): Likewise.  Use bss_section for
	SECCAT_BSS if nonnull.  Use get_named_section.
	(default_select_rtx_section): Return a section rather than
	emitting assembly code.
	(default_elf_select_rtx_section): Likewise.  Use get_named_section.
	(file_end_indicate_exec_stack): Use switch_to_section and get_section.
	(output_section_asm_op, switch_to_section): New functions.
	* vmsdbgout.c (vmsdbgout_finish): Use switch_to_section and
	get_named_section.

	* doc/tm.texi: Expand the introduction to the sections documentation.
	(TRAMPOLINE_SECTION): Document new interface.
	(SDATA_SECTION_ASM_OP): Document new macro.
	(READONLY_DATA_SECTION): Delete.
	(SDATA_SECTION_ASM_OP): Document new macro.
	(EXTRA_SECTIONS, EXTRA_SECTION_FUNCTIONS): Delete.
	(TARGET_ASM_INIT_SECTIONS): Document new hook.
	(TARGET_ASM_SELECT_SECTION, TARGET_ASM_FUNCTION_RODATA_SECTION)
	(TARGET_ASM_SELECT_RTX_SECTION): Adjust for new interface.
	(TARGET_EXCEPTION_SECTION, TARGET_EH_FRAME_SECTION): Delete.

gcc/java/
	* class.c (build_utf8_ref, emit_register_classes): Use
	switch_to_section and get_section.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@108152 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 89 insertions, 68 deletions

diff --git a/gcc/dwarf2out.c b/gcc/dwarf2out.c
index ad7154e7d5f..3752fa6626a 100644
--- a/gcc/dwarf2out.c
+++ b/gcc/dwarf2out.c
@@ -113,12 +113,12 @@ dwarf2out_do_frame (void)
 #define PTR_SIZE (POINTER_SIZE / BITS_PER_UNIT)
 #endif
 
-/* Various versions of targetm.eh_frame_section.  Note these must appear
-   outside the DWARF2_DEBUGGING_INFO || DWARF2_UNWIND_INFO macro guards.  */
+/* Return the default value of eh_frame_section.  Note that this function
+   must appear outside the DWARF2_DEBUGGING_INFO || DWARF2_UNWIND_INFO
+   macro guards.  */
 
-/* Version of targetm.eh_frame_section for systems with named sections.  */
-void
-named_section_eh_frame_section (void)
+section *
+default_eh_frame_section (void)
 {
 #ifdef EH_FRAME_SECTION_NAME
   int flags;
@@ -143,30 +143,9 @@ named_section_eh_frame_section (void)
     }
   else
     flags = SECTION_WRITE;
-  named_section_flags (EH_FRAME_SECTION_NAME, flags);
-#endif
-}
-
-/* Version of targetm.eh_frame_section for systems using collect2.  */
-void
-collect2_eh_frame_section (void)
-{
-  tree label = get_file_function_name ('F');
-
-  data_section ();
-  ASM_OUTPUT_ALIGN (asm_out_file, floor_log2 (PTR_SIZE));
-  targetm.asm_out.globalize_label (asm_out_file, IDENTIFIER_POINTER (label));
-  ASM_OUTPUT_LABEL (asm_out_file, IDENTIFIER_POINTER (label));
-}
-
-/* Default version of targetm.eh_frame_section.  */
-void
-default_eh_frame_section (void)
-{
-#ifdef EH_FRAME_SECTION_NAME
-  named_section_eh_frame_section ();
+  return get_section (EH_FRAME_SECTION_NAME, flags, NULL);
 #else
-  collect2_eh_frame_section ();
+  return NULL;
 #endif
 }
 
@@ -190,6 +169,17 @@ static GTY(()) VEC(tree,gc) *incomplete_types;
    define type declaration DIE's.  */
 static GTY(()) VEC(tree,gc) *decl_scope_table;
 
+/* Pointers to various DWARF2 sections.  */
+static GTY(()) section *debug_info_section;
+static GTY(()) section *debug_abbrev_section;
+static GTY(()) section *debug_aranges_section;
+static GTY(()) section *debug_macinfo_section;
+static GTY(()) section *debug_line_section;
+static GTY(()) section *debug_loc_section;
+static GTY(()) section *debug_pubnames_section;
+static GTY(()) section *debug_str_section;
+static GTY(()) section *debug_ranges_section;
+
 /* How to start an assembler comment.  */
 #ifndef ASM_COMMENT_START
 #define ASM_COMMENT_START ";#"
@@ -1994,6 +1984,28 @@ dw_cfi_oprnd2_desc (enum dwarf_call_frame_info cfi)
 
 #if defined (DWARF2_DEBUGGING_INFO) || defined (DWARF2_UNWIND_INFO)
 
+/* Switch to eh_frame_section.  If we don't have an eh_frame_section,
+   switch to the data section instead, and write out a synthetic label
+   for collect2.  */
+
+static void
+switch_to_eh_frame_section (void)
+{
+  tree label;
+
+  if (eh_frame_section)
+    switch_to_section (eh_frame_section);
+  else
+    {
+      switch_to_section (data_section);
+      label = get_file_function_name ('F');
+      ASM_OUTPUT_ALIGN (asm_out_file, floor_log2 (PTR_SIZE));
+      targetm.asm_out.globalize_label (asm_out_file,
+				       IDENTIFIER_POINTER (label));
+      ASM_OUTPUT_LABEL (asm_out_file, IDENTIFIER_POINTER (label));
+    }
+}
+
 /* Map register numbers held in the call frame info that gcc has
    collected using DWARF_FRAME_REGNUM to those that should be output in
    .debug_frame and .eh_frame.  */
@@ -2188,9 +2200,9 @@ output_call_frame_info (int for_eh)
     app_enable ();
 
   if (for_eh)
-    targetm.asm_out.eh_frame_section ();
+    switch_to_eh_frame_section ();
   else
-    named_section_flags (DEBUG_FRAME_SECTION, SECTION_DEBUG);
+    switch_to_section (get_section (DEBUG_FRAME_SECTION, SECTION_DEBUG, NULL));
 
   ASM_GENERATE_INTERNAL_LABEL (section_start_label, FRAME_BEGIN_LABEL, for_eh);
   ASM_OUTPUT_LABEL (asm_out_file, section_start_label);
@@ -2492,7 +2504,7 @@ dwarf2out_begin_prologue (unsigned int line ATTRIBUTE_UNUSED,
     return;
 #endif
 
-  function_section (current_function_decl);
+  switch_to_section (function_section (current_function_decl));
   ASM_GENERATE_INTERNAL_LABEL (label, FUNC_BEGIN_LABEL,
 			       current_function_funcdef_no);
   ASM_OUTPUT_DEBUG_LABEL (asm_out_file, FUNC_BEGIN_LABEL,
@@ -4988,7 +5000,7 @@ AT_string_form (dw_attr_ref a)
   /* If we cannot expect the linker to merge strings in .debug_str
      section, only put it into .debug_str if it is worth even in this
      single module.  */
-  if ((DEBUG_STR_SECTION_FLAGS & SECTION_MERGE) == 0
+  if ((debug_str_section->common.flags & SECTION_MERGE) == 0
       && (len - DWARF_OFFSET_SIZE) * node->refcount <= len)
     return node->form = DW_FORM_string;
 
@@ -7196,12 +7208,12 @@ output_comp_unit (dw_die_ref die, int output_if_empty)
       sprintf (tmp, ".gnu.linkonce.wi.%s", oldsym);
       secname = tmp;
       die->die_symbol = NULL;
+      switch_to_section (get_section (secname, SECTION_DEBUG, NULL));
     }
   else
-    secname = (const char *) DEBUG_INFO_SECTION;
+    switch_to_section (debug_info_section);
 
   /* Output debugging information.  */
-  named_section_flags (secname, SECTION_DEBUG);
   output_compilation_unit_header ();
   output_die (die);
 
@@ -7828,10 +7840,7 @@ output_line_info (void)
   current_file = 1;
   current_line = 1;
 
-  if (cfun
-      && (last_text_section == in_unlikely_executed_text
-	  || (last_text_section == in_named
-	      && last_text_section_name == cfun->unlikely_text_section_name)))
+  if (cfun && unlikely_text_section_p (last_text_section))
     strcpy (prev_line_label, cfun->cold_section_label);
   else
     strcpy (prev_line_label, text_section_label);
@@ -10176,11 +10185,7 @@ secname_for_decl (tree decl)
       tree sectree = DECL_SECTION_NAME (current_function_decl);
       secname = TREE_STRING_POINTER (sectree);
     }
-  else if (cfun
-	   && (last_text_section == in_unlikely_executed_text
-	       || (last_text_section == in_named
-		   && last_text_section_name
-		      == cfun->unlikely_text_section_name)))
+  else if (cfun && unlikely_text_section_p (last_text_section))
     secname = cfun->cold_section_label;
   else
     secname = text_section_label;
@@ -13383,7 +13388,7 @@ static void
 dwarf2out_begin_block (unsigned int line ATTRIBUTE_UNUSED,
 		       unsigned int blocknum)
 {
-  current_function_section (current_function_decl);
+  switch_to_section (current_function_section ());
   ASM_OUTPUT_DEBUG_LABEL (asm_out_file, BLOCK_BEGIN_LABEL, blocknum);
 }
 
@@ -13393,7 +13398,7 @@ dwarf2out_begin_block (unsigned int line ATTRIBUTE_UNUSED,
 static void
 dwarf2out_end_block (unsigned int line ATTRIBUTE_UNUSED, unsigned int blocknum)
 {
-  current_function_section (current_function_decl);
+  switch_to_section (current_function_section ());
   ASM_OUTPUT_DEBUG_LABEL (asm_out_file, BLOCK_END_LABEL, blocknum);
 }
 
@@ -13550,10 +13555,7 @@ dwarf2out_var_location (rtx loc_note)
   newloc->var_loc_note = loc_note;
   newloc->next = NULL;
 
-  if (cfun
-      && (last_text_section == in_unlikely_executed_text
-	  || (last_text_section == in_named
-	      && last_text_section_name == cfun->unlikely_text_section_name)))
+  if (cfun && unlikely_text_section_p (last_text_section))
     newloc->section_label = cfun->cold_section_label;
   else
     newloc->section_label = text_section_label;
@@ -13588,7 +13590,7 @@ dwarf2out_source_line (unsigned int line, const char *filename)
   if (debug_info_level >= DINFO_LEVEL_NORMAL
       && line != 0)
     {
-      current_function_section (current_function_decl);
+      switch_to_section (current_function_section ());
 
       /* If requested, emit something human-readable.  */
       if (flag_debug_asm)
@@ -13685,7 +13687,7 @@ dwarf2out_start_source_file (unsigned int lineno, const char *filename)
     {
       int fileno;
 
-      named_section_flags (DEBUG_MACINFO_SECTION, SECTION_DEBUG);
+      switch_to_section (debug_macinfo_section);
       dw2_asm_output_data (1, DW_MACINFO_start_file, "Start new file");
       dw2_asm_output_data_uleb128 (lineno, "Included from line number %d",
 				   lineno);
@@ -13706,7 +13708,7 @@ dwarf2out_end_source_file (unsigned int lineno ATTRIBUTE_UNUSED)
 
   if (debug_info_level >= DINFO_LEVEL_VERBOSE)
     {
-      named_section_flags (DEBUG_MACINFO_SECTION, SECTION_DEBUG);
+      switch_to_section (debug_macinfo_section);
       dw2_asm_output_data (1, DW_MACINFO_end_file, "End file");
     }
 }
@@ -13721,7 +13723,7 @@ dwarf2out_define (unsigned int lineno ATTRIBUTE_UNUSED,
 {
   if (debug_info_level >= DINFO_LEVEL_VERBOSE)
     {
-      named_section_flags (DEBUG_MACINFO_SECTION, SECTION_DEBUG);
+      switch_to_section (debug_macinfo_section);
       dw2_asm_output_data (1, DW_MACINFO_define, "Define macro");
       dw2_asm_output_data_uleb128 (lineno, "At line number %d", lineno);
       dw2_asm_output_nstring (buffer, -1, "The macro");
@@ -13738,7 +13740,7 @@ dwarf2out_undef (unsigned int lineno ATTRIBUTE_UNUSED,
 {
   if (debug_info_level >= DINFO_LEVEL_VERBOSE)
     {
-      named_section_flags (DEBUG_MACINFO_SECTION, SECTION_DEBUG);
+      switch_to_section (debug_macinfo_section);
       dw2_asm_output_data (1, DW_MACINFO_undef, "Undefine macro");
       dw2_asm_output_data_uleb128 (lineno, "At line number %d", lineno);
       dw2_asm_output_nstring (buffer, -1, "The macro");
@@ -13790,6 +13792,25 @@ dwarf2out_init (const char *filename ATTRIBUTE_UNUSED)
 
   used_rtx_array = VEC_alloc (rtx, gc, 32);
 
+  debug_info_section = get_section (DEBUG_INFO_SECTION,
+				    SECTION_DEBUG, NULL);
+  debug_abbrev_section = get_section (DEBUG_ABBREV_SECTION,
+				      SECTION_DEBUG, NULL);
+  debug_aranges_section = get_section (DEBUG_ARANGES_SECTION,
+				       SECTION_DEBUG, NULL);
+  debug_macinfo_section = get_section (DEBUG_MACINFO_SECTION,
+				       SECTION_DEBUG, NULL);
+  debug_line_section = get_section (DEBUG_LINE_SECTION,
+				    SECTION_DEBUG, NULL);
+  debug_loc_section = get_section (DEBUG_LOC_SECTION,
+				   SECTION_DEBUG, NULL);
+  debug_pubnames_section = get_section (DEBUG_PUBNAMES_SECTION,
+					SECTION_DEBUG, NULL);
+  debug_str_section = get_section (DEBUG_STR_SECTION,
+				   DEBUG_STR_SECTION_FLAGS, NULL);
+  debug_ranges_section = get_section (DEBUG_RANGES_SECTION,
+				      SECTION_DEBUG, NULL);
+
   ASM_GENERATE_INTERNAL_LABEL (text_end_label, TEXT_END_LABEL, 0);
   ASM_GENERATE_INTERNAL_LABEL (abbrev_section_label,
 			       DEBUG_ABBREV_SECTION_LABEL, 0);
@@ -13804,22 +13825,22 @@ dwarf2out_init (const char *filename ATTRIBUTE_UNUSED)
 			       DEBUG_LINE_SECTION_LABEL, 0);
   ASM_GENERATE_INTERNAL_LABEL (ranges_section_label,
 			       DEBUG_RANGES_SECTION_LABEL, 0);
-  named_section_flags (DEBUG_ABBREV_SECTION, SECTION_DEBUG);
+  switch_to_section (debug_abbrev_section);
   ASM_OUTPUT_LABEL (asm_out_file, abbrev_section_label);
-  named_section_flags (DEBUG_INFO_SECTION, SECTION_DEBUG);
+  switch_to_section (debug_info_section);
   ASM_OUTPUT_LABEL (asm_out_file, debug_info_section_label);
-  named_section_flags (DEBUG_LINE_SECTION, SECTION_DEBUG);
+  switch_to_section (debug_line_section);
   ASM_OUTPUT_LABEL (asm_out_file, debug_line_section_label);
 
   if (debug_info_level >= DINFO_LEVEL_VERBOSE)
     {
-      named_section_flags (DEBUG_MACINFO_SECTION, SECTION_DEBUG);
+      switch_to_section (debug_macinfo_section);
       ASM_GENERATE_INTERNAL_LABEL (macinfo_section_label,
 				   DEBUG_MACINFO_SECTION_LABEL, 0);
       ASM_OUTPUT_LABEL (asm_out_file, macinfo_section_label);
     }
 
-  text_section ();
+  switch_to_section (text_section);
   ASM_OUTPUT_LABEL (asm_out_file, text_section_label);
   if (flag_reorder_blocks_and_partition)
     {
@@ -13838,7 +13859,7 @@ output_indirect_string (void **h, void *v ATTRIBUTE_UNUSED)
 
   if (node->form == DW_FORM_strp)
     {
-      named_section_flags (DEBUG_STR_SECTION, DEBUG_STR_SECTION_FLAGS);
+      switch_to_section (debug_str_section);
       ASM_OUTPUT_LABEL (asm_out_file, node->label);
       assemble_string (node->str, strlen (node->str) + 1);
     }
@@ -14155,7 +14176,7 @@ dwarf2out_finish (const char *filename)
     add_sibling_attributes (node->die);
 
   /* Output a terminator label for the .text section.  */
-  text_section ();
+  switch_to_section (text_section);
   targetm.asm_out.internal_label (asm_out_file, TEXT_END_LABEL, 0);
   if (flag_reorder_blocks_and_partition)
     {
@@ -14170,7 +14191,7 @@ dwarf2out_finish (const char *filename)
      examining the file.  */
   if (! DWARF2_ASM_LINE_DEBUG_INFO)
     {
-      named_section_flags (DEBUG_LINE_SECTION, SECTION_DEBUG);
+      switch_to_section (debug_line_section);
       output_line_info ();
     }
 
@@ -14178,7 +14199,7 @@ dwarf2out_finish (const char *filename)
   if (have_location_lists)
     {
       /* Output the location lists info.  */
-      named_section_flags (DEBUG_LOC_SECTION, SECTION_DEBUG);
+      switch_to_section (debug_loc_section);
       ASM_GENERATE_INTERNAL_LABEL (loc_section_label,
 				   DEBUG_LOC_SECTION_LABEL, 0);
       ASM_OUTPUT_LABEL (asm_out_file, loc_section_label);
@@ -14214,13 +14235,13 @@ dwarf2out_finish (const char *filename)
   output_comp_unit (comp_unit_die, 0);
 
   /* Output the abbreviation table.  */
-  named_section_flags (DEBUG_ABBREV_SECTION, SECTION_DEBUG);
+  switch_to_section (debug_abbrev_section);
   output_abbrev_section ();
 
   /* Output public names table if necessary.  */
   if (pubname_table_in_use)
     {
-      named_section_flags (DEBUG_PUBNAMES_SECTION, SECTION_DEBUG);
+      switch_to_section (debug_pubnames_section);
       output_pubnames ();
     }
 
@@ -14228,14 +14249,14 @@ dwarf2out_finish (const char *filename)
      table, so don't write it out if we don't have any.  */
   if (fde_table_in_use)
     {
-      named_section_flags (DEBUG_ARANGES_SECTION, SECTION_DEBUG);
+      switch_to_section (debug_aranges_section);
       output_aranges ();
     }
 
   /* Output ranges section if necessary.  */
   if (ranges_table_in_use)
     {
-      named_section_flags (DEBUG_RANGES_SECTION, SECTION_DEBUG);
+      switch_to_section (debug_ranges_section);
       ASM_OUTPUT_LABEL (asm_out_file, ranges_section_label);
       output_ranges ();
     }
@@ -14243,7 +14264,7 @@ dwarf2out_finish (const char *filename)
   /* Have to end the macro section.  */
   if (debug_info_level >= DINFO_LEVEL_VERBOSE)
     {
-      named_section_flags (DEBUG_MACINFO_SECTION, SECTION_DEBUG);
+      switch_to_section (debug_macinfo_section);
       dw2_asm_output_data (1, 0, "End compilation unit");
     }