* 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

5 files changed, 58 insertions, 141 deletions

diff --git a/gcc/config/alpha/alpha-protos.h b/gcc/config/alpha/alpha-protos.h
index f6b237a1c0f..00fc52530b0 100644
--- a/gcc/config/alpha/alpha-protos.h
+++ b/gcc/config/alpha/alpha-protos.h
@@ -127,8 +127,6 @@ extern rtx unicosmk_add_call_info_word (rtx);
 extern void unicosmk_defer_case_vector (rtx, rtx);
 extern void unicosmk_add_extern (const char *);
 extern void unicosmk_output_align (FILE *, int);
-extern char * unicosmk_text_section (void);
-extern char * unicosmk_data_section (void);
 extern void unicosmk_output_common (FILE *, const char *, int, int);
 extern int unicosmk_initial_elimination_offset (int, int);
 #endif
diff --git a/gcc/config/alpha/alpha.c b/gcc/config/alpha/alpha.c
index 6824d077570..244aa271204 100644
--- a/gcc/config/alpha/alpha.c
+++ b/gcc/config/alpha/alpha.c
@@ -7959,14 +7959,14 @@ alpha_start_function (FILE *file, const char *fnname,
 
 #if TARGET_ABI_OPEN_VMS
   /* Ifdef'ed cause link_section are only available then.  */
-  readonly_data_section ();
+  switch_to_section (readonly_data_section);
   fprintf (file, "\t.align 3\n");
   assemble_name (file, fnname); fputs ("..na:\n", file);
   fputs ("\t.ascii \"", file);
   assemble_name (file, fnname);
   fputs ("\\0\"\n", file);
   alpha_need_linkage (fnname, 1);
-  text_section ();
+  switch_to_section (text_section);
 #endif
 }
 
@@ -9355,18 +9355,18 @@ alpha_file_start (void)
 
 #ifdef OBJECT_FORMAT_ELF
 
-/* Switch to the section to which we should output X.  The only thing
-   special we do here is to honor small data.  */
+/* Return a section for X.  The only special thing we do here is to
+   honor small data.  */
 
-static void
+static section *
 alpha_elf_select_rtx_section (enum machine_mode mode, rtx x,
 			      unsigned HOST_WIDE_INT align)
 {
   if (TARGET_SMALL_DATA && GET_MODE_SIZE (mode) <= g_switch_value)
     /* ??? Consider using mergeable sdata sections.  */
-    sdata_section ();
+    return sdata_section;
   else
-    default_elf_select_rtx_section (mode, x, align);
+    return default_elf_select_rtx_section (mode, x, align);
 }
 
 #endif /* OBJECT_FORMAT_ELF */
@@ -9636,8 +9636,10 @@ alpha_write_linkage (FILE *stream, const char *funname, tree fundecl)
   splay_tree_node node;
   struct alpha_funcs *func;
 
-  link_section ();
+  fprintf (stream, "\t.link\n");
   fprintf (stream, "\t.align 3\n");
+  in_section = NULL;
+
   node = splay_tree_lookup (alpha_funcs_tree, (splay_tree_key) fundecl);
   func = (struct alpha_funcs *) node->value;
 
@@ -9717,7 +9719,7 @@ vms_asm_named_section (const char *name, unsigned int flags,
 static void
 vms_asm_out_constructor (rtx symbol, int priority ATTRIBUTE_UNUSED)
 {
-  ctors_section ();
+  switch_to_section (ctors_section);
   assemble_align (BITS_PER_WORD);
   assemble_integer (symbol, UNITS_PER_WORD, BITS_PER_WORD, 1);
 }
@@ -9725,7 +9727,7 @@ vms_asm_out_constructor (rtx symbol, int priority ATTRIBUTE_UNUSED)
 static void
 vms_asm_out_destructor (rtx symbol, int priority ATTRIBUTE_UNUSED)
 {
-  dtors_section ();
+  switch_to_section (dtors_section);
   assemble_align (BITS_PER_WORD);
   assemble_integer (symbol, UNITS_PER_WORD, BITS_PER_WORD, 1);
 }
@@ -9826,7 +9828,7 @@ unicosmk_output_common (FILE *file, const char *name, int size, int align)
   tree name_tree;
   printf ("T3E__: common %s\n", name);
 
-  common_section ();
+  in_section = NULL;
   fputs("\t.endp\n\n\t.psect ", file);
   assemble_name(file, name);
   fprintf(file, ",%d,common\n", floor_log2 (align / BITS_PER_UNIT));
@@ -9841,6 +9843,43 @@ unicosmk_output_common (FILE *file, const char *name, int size, int align)
 #define SECTION_MAIN (SECTION_PUBLIC << 1)
 static int current_section_align;
 
+/* A get_unnamed_section callback for switching to the text section.  */
+
+static void
+unicosmk_output_text_section_asm_op (const void *data ATTRIBUTE_UNUSED)
+{
+  static int count = 0;
+  fprintf (asm_out_file, "\t.endp\n\n\t.psect\tgcc@text___%d,code\n", count++);
+}
+
+/* A get_unnamed_section callback for switching to the data section.  */
+
+static void
+unicosmk_output_data_section_asm_op (const void *data ATTRIBUTE_UNUSED)
+{
+  static int count = 1;
+  fprintf (asm_out_file, "\t.endp\n\n\t.psect\tgcc@data___%d,data\n", count++);
+}
+
+/* Implement TARGET_ASM_INIT_SECTIONS.
+
+   The Cray assembler is really weird with respect to sections. It has only
+   named sections and you can't reopen a section once it has been closed.
+   This means that we have to generate unique names whenever we want to
+   reenter the text or the data section.  */
+
+static void
+unicosmk_init_sections (void)
+{
+  text_section = get_unnamed_section (SECTION_CODE,
+				      unicosmk_output_text_section_asm_op,
+				      NULL);
+  data_section = get_unnamed_section (SECTION_WRITE,
+				      unicosmk_output_data_section_asm_op,
+				      NULL);
+  readonly_data_section = data_section;
+}
+
 static unsigned int
 unicosmk_section_type_flags (tree decl, const char *name,
 			     int reloc ATTRIBUTE_UNUSED)
@@ -10004,7 +10043,7 @@ unicosmk_output_deferred_case_vectors (FILE *file)
   if (machine->addr_list == NULL_RTX)
     return;
 
-  data_section ();
+  switch_to_section (data_section);
   for (t = machine->addr_list; t; t = XEXP (t, 1))
     unicosmk_output_addr_vec (file, XEXP (t, 0));
 }
@@ -10123,7 +10162,7 @@ unicosmk_output_ssib (FILE *file, const char *fnname)
   rtx ciw;
   struct machine_function *machine = cfun->machine;
 
-  ssib_section ();
+  in_section = NULL;
   fprintf (file, "\t.endp\n\n\t.psect\t%s%s,data\n", user_label_prefix,
 	   unicosmk_ssib_name ());
 
@@ -10195,26 +10234,6 @@ unicosmk_add_call_info_word (rtx x)
 		  + strlen (current_function_name ())/8 + 5);
 }
 
-static char unicosmk_section_buf[100];
-
-char *
-unicosmk_text_section (void)
-{
-  static int count = 0;
-  sprintf (unicosmk_section_buf, "\t.endp\n\n\t.psect\tgcc@text___%d,code",
-				 count++);
-  return unicosmk_section_buf;
-}
-
-char *
-unicosmk_data_section (void)
-{
-  static int count = 1;
-  sprintf (unicosmk_section_buf, "\t.endp\n\n\t.psect\tgcc@data___%d,data",
-				 count++);
-  return unicosmk_section_buf;
-}
-
 /* The Cray assembler doesn't accept extern declarations for symbols which
    are defined in the same file. We have to keep track of all global
    symbols which are referenced and/or defined in a source file and output
diff --git a/gcc/config/alpha/elf.h b/gcc/config/alpha/elf.h
index 43449f5adcc..043a5244c08 100644
--- a/gcc/config/alpha/elf.h
+++ b/gcc/config/alpha/elf.h
@@ -123,9 +123,9 @@ do {									\
 #define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN)		\
 do {									\
   if ((SIZE) <= g_switch_value)						\
-    sbss_section();							\
+    switch_to_section (sbss_section);					\
   else									\
-    bss_section();							\
+    switch_to_section (bss_section);					\
   ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "object");			\
   if (!flag_inhibit_size_directive)					\
     ASM_OUTPUT_SIZE_DIRECTIVE (FILE, NAME, SIZE);			\
@@ -193,37 +193,6 @@ do {									\
 
 #endif
 
-/* A default list of other sections which we might be "in" at any given
-   time.  For targets that use additional sections (e.g. .tdesc) you
-   should override this definition in the target-specific file which
-   includes this file.  */
-
-#undef  EXTRA_SECTIONS
-#define EXTRA_SECTIONS in_sbss, in_sdata
-
-/* A default list of extra section function definitions.  For targets
-   that use additional sections (e.g. .tdesc) you should override this
-   definition in the target-specific file which includes this file.  */
-
-#undef  EXTRA_SECTION_FUNCTIONS
-#define EXTRA_SECTION_FUNCTIONS						\
-  SECTION_FUNCTION_TEMPLATE(sbss_section, in_sbss, SBSS_SECTION_ASM_OP)	\
-  SECTION_FUNCTION_TEMPLATE(sdata_section, in_sdata, SDATA_SECTION_ASM_OP)
-
-extern void sbss_section (void);
-extern void sdata_section (void);
-
-#undef  SECTION_FUNCTION_TEMPLATE
-#define SECTION_FUNCTION_TEMPLATE(FN, ENUM, OP)	\
-void FN (void)					\
-{						\
-  if (in_section != ENUM)			\
-    {						\
-      fprintf (asm_out_file, "%s\n", OP);	\
-      in_section = ENUM;			\
-    }						\
-}
-
 /* Switch into a generic section.  */
 #define TARGET_ASM_NAMED_SECTION  default_elf_asm_named_section
 #define TARGET_ASM_SELECT_SECTION  default_elf_select_section
diff --git a/gcc/config/alpha/unicosmk.h b/gcc/config/alpha/unicosmk.h
index da7d375f3b4..a05b33396c0 100644
--- a/gcc/config/alpha/unicosmk.h
+++ b/gcc/config/alpha/unicosmk.h
@@ -244,51 +244,9 @@ do { fprintf (FILE, "\tbr $1,0\n");			\
 /* Define this as 1 if `char' should by default be signed; else as 0.  */
 /* #define DEFAULT_SIGNED_CHAR 1 */
 
-/* The Cray assembler is really weird with respect to sections. It has only
-   named sections and you can't reopen a section once it has been closed.
-   This means that we have to generate unique names whenever we want to
-   reenter the text or the data section. The following is a rather bad hack
-   as TEXT_SECTION_ASM_OP and DATA_SECTION_ASM_OP are supposed to be
-   constants.  */
-
-#undef TEXT_SECTION_ASM_OP
-#define TEXT_SECTION_ASM_OP unicosmk_text_section ()
-
-#undef DATA_SECTION_ASM_OP
-#define DATA_SECTION_ASM_OP unicosmk_data_section ()
-
 /* There are no read-only sections on Unicos/Mk.  */
 
 #undef READONLY_DATA_SECTION_ASM_OP
-#define READONLY_DATA_SECTION data_section
-
-/* Define extra sections for common data and SSIBs (static subroutine
-   information blocks). The actual section header is output by the callers
-   of these functions.  */
-
-#undef EXTRA_SECTIONS
-#undef EXTRA_SECTION_FUNCTIONS
-
-#define EXTRA_SECTIONS in_common, in_ssib
-#define EXTRA_SECTION_FUNCTIONS	\
-COMMON_SECTION			\
-SSIB_SECTION	
-
-extern void common_section (void);
-#define COMMON_SECTION		\
-void				\
-common_section (void)		\
-{				\
-  in_section = in_common;	\
-}
-
-extern void ssib_section (void);
-#define SSIB_SECTION		\
-void				\
-ssib_section (void)		\
-{				\
-  in_section = in_ssib;		\
-}
 
 /* We take care of this in unicosmk_file_start.  */
 
@@ -413,7 +371,7 @@ ssib_section (void)		\
 
 #undef ASM_OUTPUT_LOCAL
 #define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN) \
-  do { data_section ();					\
+  do { switch_to_section (data_section);		\
        fprintf (FILE, "\t.align\t%d\n", floor_log2 ((ALIGN) / BITS_PER_UNIT));\
        ASM_OUTPUT_LABEL ((FILE), (NAME));		\
        fprintf (FILE, "\t.byte 0:"HOST_WIDE_INT_PRINT_UNSIGNED"\n",(SIZE));\
@@ -449,6 +407,7 @@ ssib_section (void)		\
 
 /* Switch into a generic section.  */
 #define TARGET_ASM_NAMED_SECTION unicosmk_asm_named_section
+#define TARGET_ASM_INIT_SECTIONS unicosmk_init_sections
 
 #undef ASM_OUTPUT_MAX_SKIP_ALIGN
 #define ASM_OUTPUT_MAX_SKIP_ALIGN(STREAM,POWER,MAXSKIP)
diff --git a/gcc/config/alpha/vms.h b/gcc/config/alpha/vms.h
index c1f4a43e4b1..83545877190 100644
--- a/gcc/config/alpha/vms.h
+++ b/gcc/config/alpha/vms.h
@@ -198,39 +198,10 @@ typedef struct {int num_args; enum avms_arg_type atypes[6];} avms_arg_info;
 #undef STACK_CHECK_BUILTIN
 #define STACK_CHECK_BUILTIN 0
 
-#define LINK_SECTION_ASM_OP "\t.link"
 #define READONLY_DATA_SECTION_ASM_OP "\t.rdata"
-#define LITERALS_SECTION_ASM_OP "\t.literals"
 #define CTORS_SECTION_ASM_OP "\t.ctors"
 #define DTORS_SECTION_ASM_OP "\t.dtors"
 
-#undef EXTRA_SECTIONS
-#define EXTRA_SECTIONS	in_link, in_literals
-
-#undef EXTRA_SECTION_FUNCTIONS
-#define EXTRA_SECTION_FUNCTIONS					\
-void								\
-link_section (void)						\
-{								\
-  if (in_section != in_link)					\
-    {								\
-      fprintf (asm_out_file, "%s\n", LINK_SECTION_ASM_OP); 	\
-      in_section = in_link;					\
-    }								\
-}                                                               \
-void								\
-literals_section (void)						\
-{								\
-  if (in_section != in_literals)				\
-    {								\
-      fprintf (asm_out_file, "%s\n", LITERALS_SECTION_ASM_OP); 	\
-      in_section = in_literals;					\
-    }								\
-}
-
-extern void link_section (void);
-extern void literals_section (void);
-
 #undef ASM_OUTPUT_ADDR_DIFF_ELT
 #define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, BODY, VALUE, REL) gcc_unreachable ()
 
@@ -327,7 +298,8 @@ do {									\
 #define TARGET_ASM_NAMED_SECTION vms_asm_named_section
 
 #define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2)				\
-  do {	literals_section();                                             \
+  do {	fprintf ((FILE), "\t.literals\n");				\
+	in_section = NULL;						\
 	fprintf ((FILE), "\t");						\
 	assemble_name (FILE, LABEL1);					\
 	fprintf (FILE, " = ");						\