Mercurial > hg > CbC > CbC_gcc
annotate gcc/config/sol2.c @ 131:84e7813d76e9
gcc-8.2
| author | mir3636 |
|---|---|
| date | Thu, 25 Oct 2018 07:37:49 +0900 |
| parents | 04ced10e8804 |
| children | 1830386684a0 |
| rev | line source |
|---|---|
| 0 | 1 /* General Solaris system support. |
| 131 | 2 Copyright (C) 2004-2018 Free Software Foundation, Inc. |
| 0 | 3 Contributed by CodeSourcery, LLC. |
| 4 | |
| 5 This file is part of GCC. | |
| 6 | |
| 7 GCC is free software; you can redistribute it and/or modify | |
| 8 it under the terms of the GNU General Public License as published by | |
| 9 the Free Software Foundation; either version 3, or (at your option) | |
| 10 any later version. | |
| 11 | |
| 12 GCC is distributed in the hope that it will be useful, | |
| 13 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 15 GNU General Public License for more details. | |
| 16 | |
| 17 You should have received a copy of the GNU General Public License | |
| 18 along with GCC; see the file COPYING3. If not see | |
| 19 <http://www.gnu.org/licenses/>. */ | |
| 20 | |
| 21 #include "config.h" | |
| 22 #include "system.h" | |
| 23 #include "coretypes.h" | |
| 111 | 24 #include "target.h" |
| 0 | 25 #include "rtl.h" |
| 111 | 26 #include "tree.h" |
| 27 #include "memmodel.h" | |
| 0 | 28 #include "tm_p.h" |
| 111 | 29 #include "stringpool.h" |
| 30 #include "attribs.h" | |
|
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31 #include "diagnostic-core.h" |
| 111 | 32 #include "varasm.h" |
| 33 #include "output.h" | |
| 0 | 34 |
| 35 tree solaris_pending_aligns, solaris_pending_inits, solaris_pending_finis; | |
| 36 | |
| 37 /* Attach any pending attributes for DECL to the list in *ATTRIBUTES. | |
| 38 Pending attributes come from #pragma or _Pragma, so this code is | |
| 39 only useful in the C family front ends, but it is included in | |
| 40 all languages to avoid changing the target machine initializer | |
| 41 depending on the language. */ | |
| 42 | |
| 43 void | |
| 44 solaris_insert_attributes (tree decl, tree *attributes) | |
| 45 { | |
| 46 tree *x, next; | |
| 47 | |
| 48 if (solaris_pending_aligns != NULL && TREE_CODE (decl) == VAR_DECL) | |
| 49 for (x = &solaris_pending_aligns; *x; x = &TREE_CHAIN (*x)) | |
| 50 { | |
| 51 tree name = TREE_PURPOSE (*x); | |
| 52 tree value = TREE_VALUE (*x); | |
| 53 if (DECL_NAME (decl) == name) | |
| 54 { | |
| 55 if (lookup_attribute ("aligned", DECL_ATTRIBUTES (decl)) | |
| 56 || lookup_attribute ("aligned", *attributes)) | |
| 57 warning (0, "ignoring %<#pragma align%> for explicitly " | |
| 58 "aligned %q+D", decl); | |
| 59 else | |
| 60 *attributes = tree_cons (get_identifier ("aligned"), value, | |
| 61 *attributes); | |
| 62 next = TREE_CHAIN (*x); | |
| 63 ggc_free (*x); | |
| 64 *x = next; | |
| 65 break; | |
| 66 } | |
| 67 } | |
| 68 | |
| 69 if (solaris_pending_inits != NULL && TREE_CODE (decl) == FUNCTION_DECL) | |
| 70 for (x = &solaris_pending_inits; *x; x = &TREE_CHAIN (*x)) | |
| 71 { | |
| 72 tree name = TREE_PURPOSE (*x); | |
| 73 if (DECL_NAME (decl) == name) | |
| 74 { | |
| 75 *attributes = tree_cons (get_identifier ("init"), NULL, | |
| 76 *attributes); | |
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77 TREE_USED (decl) = 1; |
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78 DECL_PRESERVE_P (decl) = 1; |
| 0 | 79 next = TREE_CHAIN (*x); |
| 80 ggc_free (*x); | |
| 81 *x = next; | |
| 82 break; | |
| 83 } | |
| 84 } | |
| 85 | |
| 86 if (solaris_pending_finis != NULL && TREE_CODE (decl) == FUNCTION_DECL) | |
| 87 for (x = &solaris_pending_finis; *x; x = &TREE_CHAIN (*x)) | |
| 88 { | |
| 89 tree name = TREE_PURPOSE (*x); | |
| 90 if (DECL_NAME (decl) == name) | |
| 91 { | |
| 92 *attributes = tree_cons (get_identifier ("fini"), NULL, | |
| 93 *attributes); | |
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94 TREE_USED (decl) = 1; |
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95 DECL_PRESERVE_P (decl) = 1; |
| 0 | 96 next = TREE_CHAIN (*x); |
| 97 ggc_free (*x); | |
| 98 *x = next; | |
| 99 break; | |
| 100 } | |
| 101 } | |
| 102 } | |
| 103 | |
| 104 /* Output initializer or finalizer entries for DECL to FILE. */ | |
| 105 | |
| 106 void | |
| 107 solaris_output_init_fini (FILE *file, tree decl) | |
| 108 { | |
| 109 if (lookup_attribute ("init", DECL_ATTRIBUTES (decl))) | |
| 110 { | |
| 111 | 111 fprintf (file, "\t.pushsection\t" SECTION_NAME_FORMAT "\n", ".init"); |
| 0 | 112 ASM_OUTPUT_CALL (file, decl); |
| 113 fprintf (file, "\t.popsection\n"); | |
| 114 } | |
| 115 | |
| 116 if (lookup_attribute ("fini", DECL_ATTRIBUTES (decl))) | |
| 117 { | |
| 111 | 118 fprintf (file, "\t.pushsection\t" SECTION_NAME_FORMAT "\n", ".fini"); |
| 0 | 119 ASM_OUTPUT_CALL (file, decl); |
| 120 fprintf (file, "\t.popsection\n"); | |
| 121 } | |
| 122 } | |
| 123 | |
|
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124 /* Emit an assembler directive to set symbol for DECL visibility to |
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125 the visibility type VIS, which must not be VISIBILITY_DEFAULT. */ |
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126 |
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127 void |
| 111 | 128 solaris_assemble_visibility (tree decl, int vis ATTRIBUTE_UNUSED) |
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129 { |
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130 #ifdef HAVE_GAS_HIDDEN |
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131 /* Sun as uses .symbolic for STV_PROTECTED. STV_INTERNAL is marked as |
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132 `currently reserved', but the linker treats it like STV_HIDDEN. Sun |
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133 Studio 12.1 cc emits .hidden instead. |
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134 |
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135 There are 3 Sun extensions GCC doesn't yet know about: STV_EXPORTED, |
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136 STV_SINGLETON, and STV_ELIMINATE. |
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137 |
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138 See Linker and Libraries Guide, Ch. 2, Link-Editor, Defining |
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139 Additional Symbols, and Ch. 7, Object-File Format, Symbol Table |
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140 Section. */ |
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141 |
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142 static const char * const visibility_types[] = { |
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143 NULL, "symbolic", "hidden", "hidden" |
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144 }; |
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145 |
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146 const char *name, *type; |
| 111 | 147 tree id = DECL_ASSEMBLER_NAME (decl); |
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148 |
| 111 | 149 while (IDENTIFIER_TRANSPARENT_ALIAS (id)) |
| 150 id = TREE_CHAIN (id); | |
| 151 name = IDENTIFIER_POINTER (id); | |
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152 type = visibility_types[vis]; |
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153 |
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154 fprintf (asm_out_file, "\t.%s\t", type); |
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155 assemble_name (asm_out_file, name); |
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156 fprintf (asm_out_file, "\n"); |
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157 #else |
| 111 | 158 if (!DECL_ARTIFICIAL (decl)) |
| 159 warning (OPT_Wattributes, "visibility attribute not supported " | |
| 160 "in this configuration; ignored"); | |
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161 #endif |
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162 } |
| 111 | 163 |
| 164 /* Group section information entry stored in solaris_comdat_htab. */ | |
| 165 | |
| 166 typedef struct comdat_entry | |
| 167 { | |
| 168 const char *name; | |
| 169 unsigned int flags; | |
| 170 tree decl; | |
| 171 const char *sig; | |
| 172 } comdat_entry; | |
| 173 | |
| 174 /* Helpers for maintaining solaris_comdat_htab. */ | |
| 175 | |
| 176 struct comdat_entry_hasher : nofree_ptr_hash <comdat_entry> | |
| 177 { | |
| 178 static inline hashval_t hash (const comdat_entry *); | |
| 179 static inline bool equal (const comdat_entry *, const comdat_entry *); | |
| 180 static inline void remove (comdat_entry *); | |
| 181 }; | |
| 182 | |
| 183 inline hashval_t | |
| 184 comdat_entry_hasher::hash (const comdat_entry *entry) | |
| 185 { | |
| 186 return htab_hash_string (entry->sig); | |
| 187 } | |
| 188 | |
| 189 inline bool | |
| 190 comdat_entry_hasher::equal (const comdat_entry *entry1, | |
| 191 const comdat_entry *entry2) | |
| 192 { | |
| 193 return strcmp (entry1->sig, entry2->sig) == 0; | |
| 194 } | |
| 195 | |
| 196 /* Hash table of group signature symbols. */ | |
| 197 | |
| 198 static hash_table<comdat_entry_hasher> *solaris_comdat_htab; | |
| 199 | |
| 200 /* Output assembly to switch to COMDAT group section NAME with attributes | |
| 201 FLAGS and group signature symbol DECL, using Sun as syntax. */ | |
| 202 | |
| 203 void | |
| 204 solaris_elf_asm_comdat_section (const char *name, unsigned int flags, tree decl) | |
| 205 { | |
| 206 const char *signature; | |
| 207 char *section; | |
| 208 comdat_entry entry, **slot; | |
| 209 | |
| 210 if (TREE_CODE (decl) == IDENTIFIER_NODE) | |
| 211 signature = IDENTIFIER_POINTER (decl); | |
| 212 else | |
| 213 signature = IDENTIFIER_POINTER (DECL_COMDAT_GROUP (decl)); | |
| 214 | |
| 215 /* Sun as requires group sections to be fragmented, i.e. to have names of | |
| 216 the form <section>%<fragment>. Strictly speaking this is only | |
| 217 necessary to support cc -xF, but is enforced globally in violation of | |
| 218 the ELF gABI. We keep the section names generated by GCC (generally | |
| 219 of the form .text.<signature>) and append %<signature> to pacify as, | |
| 220 despite the redundancy. */ | |
| 221 section = concat (name, "%", signature, NULL); | |
| 222 | |
| 223 /* Clear SECTION_LINKONCE flag so targetm.asm_out.named_section only | |
| 224 emits this as a regular section. Emit section before .group | |
| 225 directive since Sun as treats undeclared sections as @progbits, | |
| 226 which conflicts with .bss* sections which are @nobits. */ | |
| 227 targetm.asm_out.named_section (section, flags & ~SECTION_LINKONCE, decl); | |
| 228 | |
| 229 /* Sun as separates declaration of a group section and of the group | |
| 230 itself, using the .group directive and the #comdat flag. */ | |
| 231 fprintf (asm_out_file, "\t.group\t%s," SECTION_NAME_FORMAT ",#comdat\n", | |
| 232 signature, section); | |
| 233 | |
| 234 /* Unlike GNU as, group signature symbols need to be defined explicitly | |
| 235 for Sun as. With a few exceptions, this is already the case. To | |
| 236 identify the missing ones without changing the affected frontents, | |
| 237 remember the signature symbols and emit those not marked | |
| 238 TREE_SYMBOL_REFERENCED in solaris_file_end. */ | |
| 239 if (!solaris_comdat_htab) | |
| 240 solaris_comdat_htab = new hash_table<comdat_entry_hasher> (37); | |
| 241 | |
| 242 entry.sig = signature; | |
| 243 slot = solaris_comdat_htab->find_slot (&entry, INSERT); | |
| 244 | |
| 245 if (*slot == NULL) | |
| 246 { | |
| 247 *slot = XCNEW (comdat_entry); | |
| 248 /* Remember fragmented section name. */ | |
| 249 (*slot)->name = section; | |
| 250 /* Emit as regular section, .group declaration has already been done. */ | |
| 251 (*slot)->flags = flags & ~SECTION_LINKONCE; | |
| 252 (*slot)->decl = decl; | |
| 253 (*slot)->sig = signature; | |
| 254 } | |
| 255 } | |
| 256 | |
| 257 /* Define unreferenced COMDAT group signature symbol corresponding to SLOT. */ | |
| 258 | |
| 259 int | |
| 260 solaris_define_comdat_signature (comdat_entry **slot, | |
| 261 void *aux ATTRIBUTE_UNUSED) | |
| 262 { | |
| 263 comdat_entry *entry = *slot; | |
| 264 tree decl = entry->decl; | |
| 265 | |
| 266 if (TREE_CODE (decl) != IDENTIFIER_NODE) | |
| 267 decl = DECL_COMDAT_GROUP (decl); | |
| 268 | |
| 269 if (!TREE_SYMBOL_REFERENCED (decl)) | |
| 270 { | |
| 271 /* Switch to group section, otherwise Sun as complains | |
| 272 `Group Id symbol defined outside of group'. */ | |
| 273 switch_to_section (get_section (entry->name, entry->flags, entry->decl)); | |
| 274 | |
| 275 ASM_OUTPUT_LABEL (asm_out_file, entry->sig); | |
| 276 } | |
| 277 | |
| 278 /* Continue with scan. */ | |
| 279 return 1; | |
| 280 } | |
| 281 | |
| 282 /* Emit unreferenced COMDAT group signature symbols for Sun as. */ | |
| 283 | |
| 284 void | |
| 285 solaris_file_end (void) | |
| 286 { | |
| 287 if (!solaris_comdat_htab) | |
| 288 return; | |
| 289 | |
| 290 solaris_comdat_htab->traverse <void *, solaris_define_comdat_signature> | |
| 291 (NULL); | |
| 292 } | |
| 293 | |
| 294 void | |
| 295 solaris_override_options (void) | |
| 296 { | |
| 297 /* Older versions of Solaris ld cannot handle CIE version 3 in .eh_frame. | |
| 298 Don't emit DWARF3/4 unless specifically selected if so. */ | |
| 299 if (!HAVE_LD_EH_FRAME_CIEV3 && !global_options_set.x_dwarf_version) | |
| 300 dwarf_version = 2; | |
| 301 } |