| /* Copyright (C) 2005-2022 Free Software Foundation, Inc. |
| |
| This file is part of GCC. |
| |
| GCC is free software; you can redistribute it and/or modify it under |
| the terms of the GNU General Public License as published by the Free |
| Software Foundation; either version 3, or (at your option) any later |
| version. |
| |
| GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
| WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GCC; see the file COPYING3. If not see |
| <http://www.gnu.org/licenses/>. */ |
| |
| /* Since Darwin's ld will not allow zero-sized objects, and gcc wants them, |
| we emit one byte (in darwin.cc) when such an object is encountered. |
| |
| This messes up section anchoring because the emitted byte is not counted |
| outside the port. To cope with this, we set aside sections for zero-sized |
| objects and disallow those sections from participating in section anchors |
| ("zobj_" sections, below). |
| |
| Items that might be coalesced by the linker are prevented from participating, |
| (and those in mergeable sections are disallowed in varasm.cc). */ |
| |
| /* The .text section is generated in varasm.cc */ |
| DEF_SECTION (text_coal_section, SECTION_CODE|SECTION_NO_ANCHOR, |
| ".section __TEXT,__textcoal_nt,coalesced,pure_instructions", 0) |
| |
| /* We define a picbase thunks section separately, so that we can override the |
| def to be '.text' for versions of ld64 that handle coalescing. */ |
| DEF_SECTION (picbase_thunk_section, SECTION_CODE|SECTION_NO_ANCHOR, |
| ".section __TEXT,__textcoal_nt,coalesced,pure_instructions", 0) |
| |
| DEF_SECTION (text_hot_section, SECTION_CODE, |
| ".section __TEXT,__text_hot,regular,pure_instructions", 0) |
| DEF_SECTION (text_cold_section, SECTION_CODE, |
| ".section __TEXT,__text_cold,regular,pure_instructions", 0) |
| DEF_SECTION (text_startup_section, SECTION_CODE, |
| ".section __TEXT,__text_startup,regular,pure_instructions", 0) |
| DEF_SECTION (text_exit_section, SECTION_CODE, |
| ".section __TEXT,__text_exit,regular,pure_instructions", 0) |
| |
| DEF_SECTION (text_hot_coal_section, SECTION_CODE, |
| ".section __TEXT,__text_hot_coal,coalesced,pure_instructions", 0) |
| DEF_SECTION (text_cold_coal_section, SECTION_CODE, |
| ".section __TEXT,__text_cold_coal,coalesced,pure_instructions", 0) |
| DEF_SECTION (text_startup_coal_section, SECTION_CODE, |
| ".section __TEXT,__text_stt_coal,coalesced,pure_instructions", 0) |
| DEF_SECTION (text_exit_coal_section, SECTION_CODE, |
| ".section __TEXT,__text_exit_coal,coalesced,pure_instructions", 0) |
| |
| /* const */ |
| DEF_SECTION (const_section, 0, ".const", 0) |
| DEF_SECTION (const_coal_section, SECTION_NO_ANCHOR, |
| ".section __TEXT,__const_coal,coalesced", 0) |
| /* Place to put zero-sized to avoid issues with section anchors. */ |
| DEF_SECTION (zobj_const_section, SECTION_NO_ANCHOR, |
| ".section\t__DATA,__zobj_const", 0) |
| |
| /* Write-able data. '.data' handled in varasm.cc */ |
| DEF_SECTION (static_data_section, SECTION_WRITE, ".static_data", 0) |
| DEF_SECTION (data_coal_section, SECTION_WRITE|SECTION_NO_ANCHOR, |
| ".section __DATA,__datacoal_nt,coalesced", 0) |
| /* Place to put zero-sized to avoid issues with section anchors. */ |
| DEF_SECTION (zobj_data_section, SECTION_WRITE|SECTION_NO_ANCHOR, |
| ".section\t__DATA,__zobj_data", 0) |
| |
| /* BSS - .lcomm / .zerofill __DATA,__bss sections cannot be switched to |
| explicitly (will create an assembler error). */ |
| DEF_SECTION (zobj_bss_section, SECTION_WRITE|SECTION_BSS|SECTION_NO_ANCHOR, |
| ".section\t__DATA,__zobj_bss", 0) |
| |
| /* const data */ |
| DEF_SECTION (const_data_section, 0, ".const_data", 0) |
| DEF_SECTION (const_data_coal_section, SECTION_NO_ANCHOR, |
| ".section __DATA,__const_coal,coalesced", 0) |
| /* Place to put zero-sized to avoid issues with section anchors. */ |
| DEF_SECTION (zobj_const_data_section, SECTION_NO_ANCHOR, |
| ".section\t__DATA,__zobj_cnst_data", 0) |
| |
| /* Strings and other literals. */ |
| DEF_SECTION (cstring_section, SECTION_MERGE | SECTION_STRINGS, ".cstring", 0) |
| DEF_SECTION (literal4_section, SECTION_MERGE, ".literal4", 0) |
| DEF_SECTION (literal8_section, SECTION_MERGE, ".literal8", 0) |
| DEF_SECTION (literal16_section, SECTION_MERGE, ".literal16", 0) |
| /* Unlike constant NSStrings, constant CFStrings do not live in the |
| __OBJC segment since they may also occur in pure C or C++ programs. */ |
| DEF_SECTION (cfstring_constant_object_section, 0, |
| ".section __DATA, __cfstring", 0) |
| |
| /* Module init, term, constructors & destructors. */ |
| DEF_SECTION (mod_init_section, 0, ".mod_init_func", 0) |
| DEF_SECTION (mod_term_section, 0, ".mod_term_func", 0) |
| DEF_SECTION (constructor_section, 0, ".constructor", 0) |
| DEF_SECTION (destructor_section, 0, ".destructor", 0) |
| |
| /* Objective-C ABI=0 (Original version) sections. */ |
| DEF_SECTION (objc_class_section, 0, ".objc_class", 1) |
| DEF_SECTION (objc_meta_class_section, 0, ".objc_meta_class", 1) |
| DEF_SECTION (objc_category_section, 0, ".objc_category", 1) |
| DEF_SECTION (objc_class_vars_section, 0, ".objc_class_vars", 1) |
| DEF_SECTION (objc_instance_vars_section, 0, ".objc_instance_vars", 1) |
| DEF_SECTION (objc_cls_meth_section, 0, ".objc_cls_meth", 1) |
| DEF_SECTION (objc_inst_meth_section, 0, ".objc_inst_meth", 1) |
| DEF_SECTION (objc_cat_cls_meth_section, 0, ".objc_cat_cls_meth", 1) |
| DEF_SECTION (objc_cat_inst_meth_section, 0, ".objc_cat_inst_meth", 1) |
| DEF_SECTION (objc_selector_refs_section, SECTION_MERGE, ".objc_message_refs", 1) |
| DEF_SECTION (objc_selector_fixup_section, 0, |
| ".section __OBJC, __sel_fixup, regular, no_dead_strip", 1) |
| DEF_SECTION (objc_symbols_section, 0, ".objc_symbols", 1) |
| DEF_SECTION (objc_module_info_section, 0, ".objc_module_info", 1) |
| DEF_SECTION (objc_protocol_section, 0, ".objc_protocol", 1) |
| DEF_SECTION (objc_string_object_section, 0, ".objc_string_object", 1) |
| DEF_SECTION (objc_constant_string_object_section, 0, |
| ".section __OBJC, __cstring_object, regular, no_dead_strip", 0) |
| |
| /* Fix-and-Continue image marker. */ |
| DEF_SECTION (objc_image_info_section, 0, |
| ".section __OBJC, __image_info, regular, no_dead_strip", 1) |
| DEF_SECTION (objc_class_names_section, 0, ".objc_class_names", 1) |
| DEF_SECTION (objc_meth_var_names_section, 0, ".objc_meth_var_names", 1) |
| DEF_SECTION (objc_meth_var_types_section, 0, ".objc_meth_var_types", 1) |
| DEF_SECTION (objc_cls_refs_section, SECTION_MERGE, ".objc_cls_refs", 1) |
| |
| /* Stubs and symbol indirection sections. */ |
| /* lazy symbol pointers. */ |
| DEF_SECTION (machopic_lazy_symbol_ptr_section, SECTION_NO_ANCHOR, |
| ".lazy_symbol_pointer", 0) |
| DEF_SECTION (machopic_lazy_symbol_ptr2_section, SECTION_NO_ANCHOR, |
| ".section __DATA, __la_sym_ptr2,lazy_symbol_pointers", 0) |
| DEF_SECTION (machopic_lazy_symbol_ptr3_section, SECTION_NO_ANCHOR, |
| ".section __DATA, __la_sym_ptr3,lazy_symbol_pointers", 0) |
| /* non-lazy symbol pointers. */ |
| DEF_SECTION (machopic_nl_symbol_ptr_section, SECTION_NO_ANCHOR, |
| MACHOPIC_NL_SYMBOL_PTR_SECTION, 0) |
| /* Symbol stubs. */ |
| DEF_SECTION (machopic_symbol_stub_section, SECTION_NO_ANCHOR, |
| ".symbol_stub", 0) |
| DEF_SECTION (machopic_symbol_stub1_section, SECTION_NO_ANCHOR, |
| ".section __TEXT,__symbol_stub1,symbol_stubs," |
| "pure_instructions,16", 0) |
| /* PIC symbol stubs. */ |
| DEF_SECTION (machopic_picsymbol_stub_section, SECTION_NO_ANCHOR, |
| ".picsymbol_stub", 0) |
| DEF_SECTION (machopic_picsymbol_stub1_section, SECTION_NO_ANCHOR, |
| ".section __TEXT,__picsymbolstub1,symbol_stubs," |
| "pure_instructions,32", 0) |
| DEF_SECTION (machopic_picsymbol_stub2_section, SECTION_NO_ANCHOR, |
| ".section __TEXT,__picsymbolstub2,symbol_stubs,pure_instructions,25", 0) |
| DEF_SECTION (machopic_picsymbol_stub3_section, SECTION_NO_ANCHOR, |
| ".section __IMPORT,__jump_table,symbol_stubs,self_modifying_code+pure_instructions,5", 0) |
| |
| /* Exception-related. */ |
| DEF_SECTION (darwin_exception_section, SECTION_NO_ANCHOR, |
| ".section __DATA,__gcc_except_tab", 0) |
| DEF_SECTION (darwin_eh_frame_section, SECTION_NO_ANCHOR, |
| ".section " EH_FRAME_SECTION_NAME ",__eh_frame" |
| EH_FRAME_SECTION_ATTR, 0) |
| |
| /* Sections for ObjC ABI=1 (ObjC 'V1' extensions) */ |
| DEF_SECTION (objc1_class_ext_section, 0, |
| ".section __OBJC, __class_ext, regular, no_dead_strip", 1) |
| DEF_SECTION (objc1_prop_list_section, 0, |
| ".section __OBJC, __property, regular, no_dead_strip", 1) |
| DEF_SECTION (objc1_protocol_ext_section, 0, |
| ".section __OBJC, __protocol_ext, regular, no_dead_strip", 1) |
| |
| /* Sections for ObjC ABI=2 (m64). */ |
| DEF_SECTION (objc2_message_refs_section, 0, |
| ".section __DATA, __objc_msgrefs, regular, no_dead_strip", 1) |
| DEF_SECTION (objc2_classdefs_section, 0, ".section __DATA, __objc_data", 1) |
| DEF_SECTION (objc2_metadata_section, 0, ".section __DATA, __objc_const", 1) |
| |
| DEF_SECTION (objc2_classrefs_section, 0, |
| ".section __DATA, __objc_classrefs, regular, no_dead_strip", 1) |
| DEF_SECTION (objc2_classlist_section, 0, |
| ".section __DATA, __objc_classlist, regular, no_dead_strip", 1) |
| DEF_SECTION (objc2_categorylist_section, 0, |
| ".section __DATA, __objc_catlist, regular, no_dead_strip", 1) |
| DEF_SECTION (objc2_selector_refs_section, 0, |
| ".section __DATA, __objc_selrefs, literal_pointers, no_dead_strip", 1) |
| DEF_SECTION (objc2_nonlazy_class_section, 0, |
| ".section __DATA, __objc_nlclslist, regular, no_dead_strip", 1) |
| DEF_SECTION (objc2_nonlazy_category_section, 0, |
| ".section __DATA, __objc_nlcatlist, regular, no_dead_strip", 1) |
| DEF_SECTION (objc2_protocollist_section, 0, |
| ".section __DATA, __objc_protolist, regular, no_dead_strip", 1) |
| DEF_SECTION (objc2_protocolrefs_section, 0, |
| ".section __DATA, __objc_protorefs, regular, no_dead_strip", 1) |
| DEF_SECTION (objc2_super_classrefs_section, 0, |
| ".section __DATA, __objc_superrefs, regular, no_dead_strip", 1) |
| DEF_SECTION (objc2_image_info_section, 0, |
| ".section __DATA, __objc_imageinfo, regular, no_dead_strip", 1) |
| DEF_SECTION (objc2_constant_string_object_section, 0, |
| ".section __DATA, __objc_stringobj, regular, no_dead_strip", 1) |
| |
| /* Additions for compatibility with later runtime conventions especially for |
| sections containing strings. */ |
| DEF_SECTION (objc2_data_section, 0, ".section __DATA, __data", 1) |
| |
| DEF_SECTION (objc2_ivar_section, 0, ".section __DATA, __objc_ivar", 1) |
| |
| DEF_SECTION (objc2_class_names_section, 0, |
| ".section __TEXT, __objc_classname, cstring_literals", 1) |
| |
| DEF_SECTION (objc2_method_names_section, 0, |
| ".section __TEXT, __objc_methname, cstring_literals", 1) |
| |
| DEF_SECTION (objc2_method_types_section, 0, |
| ".section __TEXT, __objc_methtype, cstring_literals", 1) |
