projects / thirdparty / gcc.git / blame
| Commit | Line | Data |
|---|---|---|
| fee3eacd | 1 | /* Copyright (C) 2005, 2006, 2010 Free Software Foundation, Inc. |
| ad41bd84 JM |
2 | |
| 3 | This file is part of GCC. | |
| 4 | ||
| 5 | GCC is free software; you can redistribute it and/or modify it under | |
| 6 | the terms of the GNU General Public License as published by the Free | |
| 7 | Software Foundation; either version 3, or (at your option) any later | |
| 8 | version. | |
| 9 | ||
| 10 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
| 11 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 12 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 13 | for more details. | |
| 14 | ||
| 15 | You should have received a copy of the GNU General Public License | |
| 16 | along with GCC; see the file COPYING3. If not see | |
| 17 | <http://www.gnu.org/licenses/>. */ | |
| 18 | ||
| 46a99b06 IS |
19 | /* Since Darwin's ld will not allow zero-sized objects, and gcc wants them, |
| 20 | we emit one byte (in darwin.c) when such an object is encountered. | |
| 21 | ||
| 22 | This messes up section anchoring because the emitted byte is not counted | |
| 23 | outside the port. To cope with this, we set aside sections for zero-sized | |
| 24 | objects and disallow those sections from participating in section anchors | |
| 25 | ("zobj_" sections, below). | |
| 26 | ||
| 27 | Items that might be coalesced by the linker are prevented from participating, | |
| 28 | (and those in mergeable sections are disallowed in varasm.c). */ | |
| 29 | ||
| fbbfcaf1 | 30 | /* The .text section is generated in varasm.c */ |
| 46a99b06 | 31 | DEF_SECTION (text_coal_section, SECTION_CODE|SECTION_NO_ANCHOR, |
| d6b5193b | 32 | ".section __TEXT,__textcoal_nt,coalesced,pure_instructions", 0) |
| 46a99b06 | 33 | |
| 1f81953b IS |
34 | DEF_SECTION (text_hot_section, SECTION_CODE, |
| 35 | ".section __TEXT,__text_hot,regular,pure_instructions", 0) | |
| 36 | DEF_SECTION (text_cold_section, SECTION_CODE, | |
| 37 | ".section __TEXT,__text_cold,regular,pure_instructions", 0) | |
| 38 | DEF_SECTION (text_startup_section, SECTION_CODE, | |
| 39 | ".section __TEXT,__text_startup,regular,pure_instructions", 0) | |
| 40 | DEF_SECTION (text_exit_section, SECTION_CODE, | |
| 41 | ".section __TEXT,__text_exit,regular,pure_instructions", 0) | |
| 42 | ||
| 43 | DEF_SECTION (text_hot_coal_section, SECTION_CODE, | |
| 44 | ".section __TEXT,__text_hot_coal,coalesced,pure_instructions", 0) | |
| 45 | DEF_SECTION (text_cold_coal_section, SECTION_CODE, | |
| 46 | ".section __TEXT,__text_cold_coal,coalesced,pure_instructions", 0) | |
| 47 | DEF_SECTION (text_startup_coal_section, SECTION_CODE, | |
| 48 | ".section __TEXT,__text_stt_coal,coalesced,pure_instructions", 0) | |
| 49 | DEF_SECTION (text_exit_coal_section, SECTION_CODE, | |
| 50 | ".section __TEXT,__text_exit_coal,coalesced,pure_instructions", 0) | |
| 51 | ||
| 46a99b06 | 52 | /* const */ |
| d6b5193b | 53 | DEF_SECTION (const_section, 0, ".const", 0) |
| 46a99b06 | 54 | DEF_SECTION (const_coal_section, SECTION_NO_ANCHOR, |
| d6b5193b | 55 | ".section __TEXT,__const_coal,coalesced", 0) |
| 46a99b06 IS |
56 | /* Place to put zero-sized to avoid issues with section anchors. */ |
| 57 | DEF_SECTION (zobj_const_section, SECTION_NO_ANCHOR, | |
| 58 | ".section\t__DATA,__zobj_const", 0) | |
| 59 | ||
| 60 | /* Write-able data. '.data' handled in varasm.c */ | |
| 61 | DEF_SECTION (static_data_section, SECTION_WRITE, ".static_data", 0) | |
| 62 | DEF_SECTION (data_coal_section, SECTION_WRITE|SECTION_NO_ANCHOR, | |
| 63 | ".section __DATA,__datacoal_nt,coalesced", 0) | |
| 64 | /* Place to put zero-sized to avoid issues with section anchors. */ | |
| 65 | DEF_SECTION (zobj_data_section, SECTION_WRITE|SECTION_NO_ANCHOR, | |
| 66 | ".section\t__DATA,__zobj_data", 0) | |
| 67 | ||
| 68 | /* BSS - .lcomm / .zerofill __DATA,__bss sections cannot be switched to | |
| 69 | explicitly (will create an assembler error). */ | |
| 70 | DEF_SECTION (zobj_bss_section, SECTION_WRITE|SECTION_BSS|SECTION_NO_ANCHOR, | |
| 71 | ".section\t__DATA,__zobj_bss", 0) | |
| 72 | ||
| 73 | /* const data */ | |
| d6b5193b | 74 | DEF_SECTION (const_data_section, 0, ".const_data", 0) |
| 46a99b06 | 75 | DEF_SECTION (const_data_coal_section, SECTION_NO_ANCHOR, |
| d6b5193b | 76 | ".section __DATA,__const_coal,coalesced", 0) |
| 46a99b06 IS |
77 | /* Place to put zero-sized to avoid issues with section anchors. */ |
| 78 | DEF_SECTION (zobj_const_data_section, SECTION_NO_ANCHOR, | |
| 79 | ".section\t__DATA,__zobj_const_data", 0) | |
| 80 | ||
| 81 | /* Strings and other literals. */ | |
| 59ff4a1c | 82 | DEF_SECTION (cstring_section, SECTION_MERGE | SECTION_STRINGS, ".cstring", 0) |
| ab0ff804 AP |
83 | DEF_SECTION (literal4_section, SECTION_MERGE, ".literal4", 0) |
| 84 | DEF_SECTION (literal8_section, SECTION_MERGE, ".literal8", 0) | |
| f7288899 | 85 | DEF_SECTION (literal16_section, SECTION_MERGE, ".literal16", 0) |
| 46a99b06 IS |
86 | /* Unlike constant NSStrings, constant CFStrings do not live in the |
| 87 | __OBJC segment since they may also occur in pure C or C++ programs. */ | |
| 88 | DEF_SECTION (cfstring_constant_object_section, 0, | |
| 89 | ".section __DATA, __cfstring", 0) | |
| 90 | ||
| 91 | /* Module init, term, constructors & destructors. */ | |
| d6b5193b RS |
92 | DEF_SECTION (mod_init_section, 0, ".mod_init_func", 0) |
| 93 | DEF_SECTION (mod_term_section, 0, ".mod_term_func", 0) | |
| 46a99b06 | 94 | DEF_SECTION (constructor_section, 0, ".constructor", 0) |
| d6b5193b | 95 | DEF_SECTION (destructor_section, 0, ".destructor", 0) |
| 46a99b06 | 96 | |
| d764a8e6 | 97 | /* Objective-C ABI=0 (Original version) sections. */ |
| d6b5193b RS |
98 | DEF_SECTION (objc_class_section, 0, ".objc_class", 1) |
| 99 | DEF_SECTION (objc_meta_class_section, 0, ".objc_meta_class", 1) | |
| 100 | DEF_SECTION (objc_category_section, 0, ".objc_category", 1) | |
| 101 | DEF_SECTION (objc_class_vars_section, 0, ".objc_class_vars", 1) | |
| 102 | DEF_SECTION (objc_instance_vars_section, 0, ".objc_instance_vars", 1) | |
| 103 | DEF_SECTION (objc_cls_meth_section, 0, ".objc_cls_meth", 1) | |
| 104 | DEF_SECTION (objc_inst_meth_section, 0, ".objc_inst_meth", 1) | |
| 105 | DEF_SECTION (objc_cat_cls_meth_section, 0, ".objc_cat_cls_meth", 1) | |
| 106 | DEF_SECTION (objc_cat_inst_meth_section, 0, ".objc_cat_inst_meth", 1) | |
| ab0ff804 | 107 | DEF_SECTION (objc_selector_refs_section, SECTION_MERGE, ".objc_message_refs", 1) |
| d6b5193b RS |
108 | DEF_SECTION (objc_selector_fixup_section, 0, |
| 109 | ".section __OBJC, __sel_fixup, regular, no_dead_strip", 1) | |
| 110 | DEF_SECTION (objc_symbols_section, 0, ".objc_symbols", 1) | |
| 111 | DEF_SECTION (objc_module_info_section, 0, ".objc_module_info", 1) | |
| 112 | DEF_SECTION (objc_protocol_section, 0, ".objc_protocol", 1) | |
| 113 | DEF_SECTION (objc_string_object_section, 0, ".objc_string_object", 1) | |
| 114 | DEF_SECTION (objc_constant_string_object_section, 0, | |
| d764a8e6 | 115 | ".section __OBJC, __cstring_object, regular, no_dead_strip", 0) |
| d6b5193b RS |
116 | |
| 117 | /* Fix-and-Continue image marker. */ | |
| 118 | DEF_SECTION (objc_image_info_section, 0, | |
| 119 | ".section __OBJC, __image_info, regular, no_dead_strip", 1) | |
| 120 | DEF_SECTION (objc_class_names_section, 0, ".objc_class_names", 1) | |
| 121 | DEF_SECTION (objc_meth_var_names_section, 0, ".objc_meth_var_names", 1) | |
| 122 | DEF_SECTION (objc_meth_var_types_section, 0, ".objc_meth_var_types", 1) | |
| ab0ff804 | 123 | DEF_SECTION (objc_cls_refs_section, SECTION_MERGE, ".objc_cls_refs", 1) |
| 46a99b06 IS |
124 | |
| 125 | /* Stubs and symbol indirection sections. */ | |
| fee3eacd | 126 | /* lazy symbol pointers. */ |
| 46a99b06 IS |
127 | DEF_SECTION (machopic_lazy_symbol_ptr_section, SECTION_NO_ANCHOR, |
| 128 | ".lazy_symbol_pointer", 0) | |
| 129 | DEF_SECTION (machopic_lazy_symbol_ptr2_section, SECTION_NO_ANCHOR, | |
| fee3eacd | 130 | ".section __DATA, __la_sym_ptr2,lazy_symbol_pointers", 0) |
| 46a99b06 | 131 | DEF_SECTION (machopic_lazy_symbol_ptr3_section, SECTION_NO_ANCHOR, |
| fee3eacd IS |
132 | ".section __DATA, __la_sym_ptr3,lazy_symbol_pointers", 0) |
| 133 | /* non-lazy symbol pointers. */ | |
| 46a99b06 | 134 | DEF_SECTION (machopic_nl_symbol_ptr_section, SECTION_NO_ANCHOR, |
| fee3eacd IS |
135 | MACHOPIC_NL_SYMBOL_PTR_SECTION, 0) |
| 136 | /* Symbol stubs. */ | |
| 46a99b06 IS |
137 | DEF_SECTION (machopic_symbol_stub_section, SECTION_NO_ANCHOR, |
| 138 | ".symbol_stub", 0) | |
| 139 | DEF_SECTION (machopic_symbol_stub1_section, SECTION_NO_ANCHOR, | |
| d6b5193b RS |
140 | ".section __TEXT,__symbol_stub1,symbol_stubs," |
| 141 | "pure_instructions,16", 0) | |
| fee3eacd | 142 | /* PIC symbol stubs. */ |
| 46a99b06 IS |
143 | DEF_SECTION (machopic_picsymbol_stub_section, SECTION_NO_ANCHOR, |
| 144 | ".picsymbol_stub", 0) | |
| 145 | DEF_SECTION (machopic_picsymbol_stub1_section, SECTION_NO_ANCHOR, | |
| d6b5193b RS |
146 | ".section __TEXT,__picsymbolstub1,symbol_stubs," |
| 147 | "pure_instructions,32", 0) | |
| 46a99b06 | 148 | DEF_SECTION (machopic_picsymbol_stub2_section, SECTION_NO_ANCHOR, |
| fee3eacd | 149 | ".section __TEXT,__picsymbolstub2,symbol_stubs,pure_instructions,25", 0) |
| 46a99b06 | 150 | DEF_SECTION (machopic_picsymbol_stub3_section, SECTION_NO_ANCHOR, |
| fee3eacd | 151 | ".section __IMPORT,__jump_table,symbol_stubs,self_modifying_code+pure_instructions,5", 0) |
| 46a99b06 | 152 | |
| fee3eacd | 153 | /* Exception-related. */ |
| 46a99b06 | 154 | DEF_SECTION (darwin_exception_section, SECTION_NO_ANCHOR, |
| d6b5193b | 155 | ".section __DATA,__gcc_except_tab", 0) |
| 46a99b06 | 156 | DEF_SECTION (darwin_eh_frame_section, SECTION_NO_ANCHOR, |
| d6b5193b RS |
157 | ".section " EH_FRAME_SECTION_NAME ",__eh_frame" |
| 158 | EH_FRAME_SECTION_ATTR, 0) | |
| d764a8e6 IS |
159 | |
| 160 | /* Sections for ObjC ABI=1 (ObjC 'V1' extensions) */ | |
| 161 | DEF_SECTION (objc1_class_ext_section, 0, | |
| 162 | ".section __OBJC, __class_ext, regular, no_dead_strip", 1) | |
| 163 | DEF_SECTION (objc1_prop_list_section, 0, | |
| 164 | ".section __OBJC, __property, regular, no_dead_strip", 1) | |
| 165 | DEF_SECTION (objc1_protocol_ext_section, 0, | |
| 166 | ".section __OBJC, __protocol_ext, regular, no_dead_strip", 1) | |
| 167 | ||
| 168 | /* Sections for ObjC ABI=2 (m64). */ | |
| 169 | DEF_SECTION (objc2_message_refs_section, 0, | |
| 170 | ".section __DATA, __objc_msgrefs, regular, no_dead_strip", 1) | |
| 171 | DEF_SECTION (objc2_classdefs_section, 0, ".section __DATA, __objc_data", 1) | |
| 172 | DEF_SECTION (objc2_metadata_section, 0, ".section __DATA, __objc_const", 1) | |
| 173 | ||
| 174 | DEF_SECTION (objc2_classrefs_section, 0, | |
| 175 | ".section __DATA, __objc_classrefs, regular, no_dead_strip", 1) | |
| 176 | DEF_SECTION (objc2_classlist_section, 0, | |
| 177 | ".section __DATA, __objc_classlist, regular, no_dead_strip", 1) | |
| 178 | DEF_SECTION (objc2_categorylist_section, 0, | |
| 179 | ".section __DATA, __objc_catlist, regular, no_dead_strip", 1) | |
| 180 | DEF_SECTION (objc2_selector_refs_section, 0, | |
| 181 | ".section __DATA, __objc_selrefs, literal_pointers, no_dead_strip", 1) | |
| 182 | DEF_SECTION (objc2_nonlazy_class_section, 0, | |
| 183 | ".section __DATA, __objc_nlclslist, regular, no_dead_strip", 1) | |
| 184 | DEF_SECTION (objc2_nonlazy_category_section, 0, | |
| 185 | ".section __DATA, __objc_nlcatlist, regular, no_dead_strip", 1) | |
| 186 | DEF_SECTION (objc2_protocollist_section, 0, | |
| 187 | ".section __DATA, __objc_protolist, regular, no_dead_strip", 1) | |
| 188 | DEF_SECTION (objc2_protocolrefs_section, 0, | |
| 189 | ".section __DATA, __objc_protorefs, regular, no_dead_strip", 1) | |
| 190 | DEF_SECTION (objc2_super_classrefs_section, 0, | |
| 191 | ".section __DATA, __objc_superrefs, regular, no_dead_strip", 1) | |
| 192 | DEF_SECTION (objc2_image_info_section, 0, | |
| 193 | ".section __DATA, __objc_imageinfo, regular, no_dead_strip", 1) | |
| 194 | DEF_SECTION (objc2_constant_string_object_section, 0, | |
| 195 | ".section __DATA, __objc_stringobj, regular, no_dead_strip", 1) |