Mercurial > hg > CbC > CbC_gcc
annotate gcc/config/darwin.c @ 55:77e2b8dfacca gcc-4.4.5
update it from 4.4.3 to 4.5.0
| author | ryoma <e075725@ie.u-ryukyu.ac.jp> |
|---|---|
| date | Fri, 12 Feb 2010 23:39:51 +0900 |
| parents | a06113de4d67 |
| children | b7f97abdc517 |
| rev | line source |
|---|---|
| 0 | 1 /* Functions for generic Darwin as target machine for GNU C compiler. |
| 2 Copyright (C) 1989, 1990, 1991, 1992, 1993, 2000, 2001, 2002, 2003, 2004, | |
|
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
3 2005, 2006, 2007, 2008, 2009 |
| 0 | 4 Free Software Foundation, Inc. |
| 5 Contributed by Apple Computer Inc. | |
| 6 | |
| 7 This file is part of GCC. | |
| 8 | |
| 9 GCC is free software; you can redistribute it and/or modify | |
| 10 it under the terms of the GNU General Public License as published by | |
| 11 the Free Software Foundation; either version 3, or (at your option) | |
| 12 any later version. | |
| 13 | |
| 14 GCC is distributed in the hope that it will be useful, | |
| 15 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 17 GNU General Public License for more details. | |
| 18 | |
| 19 You should have received a copy of the GNU General Public License | |
| 20 along with GCC; see the file COPYING3. If not see | |
| 21 <http://www.gnu.org/licenses/>. */ | |
| 22 | |
| 23 #include "config.h" | |
| 24 #include "system.h" | |
| 25 #include "coretypes.h" | |
| 26 #include "tm.h" | |
| 27 #include "rtl.h" | |
| 28 #include "regs.h" | |
| 29 #include "hard-reg-set.h" | |
| 30 #include "real.h" | |
| 31 #include "insn-config.h" | |
| 32 #include "conditions.h" | |
| 33 #include "insn-flags.h" | |
| 34 #include "output.h" | |
| 35 #include "insn-attr.h" | |
| 36 #include "flags.h" | |
| 37 #include "tree.h" | |
| 38 #include "expr.h" | |
| 39 #include "reload.h" | |
| 40 #include "function.h" | |
| 41 #include "ggc.h" | |
| 42 #include "langhooks.h" | |
| 43 #include "target.h" | |
| 44 #include "tm_p.h" | |
| 45 #include "toplev.h" | |
| 46 #include "hashtab.h" | |
| 47 #include "df.h" | |
| 48 #include "debug.h" | |
| 49 | |
| 50 /* Darwin supports a feature called fix-and-continue, which is used | |
| 51 for rapid turn around debugging. When code is compiled with the | |
| 52 -mfix-and-continue flag, two changes are made to the generated code | |
| 53 that allow the system to do things that it would normally not be | |
| 54 able to do easily. These changes allow gdb to load in | |
| 55 recompilation of a translation unit that has been changed into a | |
| 56 running program and replace existing functions and methods of that | |
| 57 translation unit with versions of those functions and methods | |
| 58 from the newly compiled translation unit. The new functions access | |
| 59 the existing static symbols from the old translation unit, if the | |
| 60 symbol existed in the unit to be replaced, and from the new | |
| 61 translation unit, otherwise. | |
| 62 | |
| 63 The changes are to insert 5 nops at the beginning of all functions | |
| 64 and to use indirection to get at static symbols. The 5 nops | |
| 65 are required by consumers of the generated code. Currently, gdb | |
| 66 uses this to patch in a jump to the overriding function, this | |
| 67 allows all uses of the old name to forward to the replacement, | |
| 68 including existing function pointers and virtual methods. See | |
| 69 rs6000_emit_prologue for the code that handles the nop insertions. | |
| 70 | |
| 71 The added indirection allows gdb to redirect accesses to static | |
| 72 symbols from the newly loaded translation unit to the existing | |
| 73 symbol, if any. @code{static} symbols are special and are handled by | |
| 74 setting the second word in the .non_lazy_symbol_pointer data | |
| 75 structure to symbol. See indirect_data for the code that handles | |
| 76 the extra indirection, and machopic_output_indirection and its use | |
| 77 of MACHO_SYMBOL_STATIC for the code that handles @code{static} | |
| 78 symbol indirection. */ | |
| 79 | |
| 80 /* Section names. */ | |
| 81 section * darwin_sections[NUM_DARWIN_SECTIONS]; | |
| 82 | |
| 83 /* True if we're setting __attribute__ ((ms_struct)). */ | |
| 84 int darwin_ms_struct = false; | |
| 85 | |
| 86 /* A get_unnamed_section callback used to switch to an ObjC section. | |
| 87 DIRECTIVE is as for output_section_asm_op. */ | |
| 88 | |
| 89 static void | |
| 90 output_objc_section_asm_op (const void *directive) | |
| 91 { | |
| 92 static bool been_here = false; | |
| 93 | |
| 94 if (! been_here) | |
| 95 { | |
| 96 static const enum darwin_section_enum tomark[] = | |
| 97 { | |
| 98 /* written, cold -> hot */ | |
| 99 objc_cat_cls_meth_section, | |
| 100 objc_cat_inst_meth_section, | |
| 101 objc_string_object_section, | |
| 102 objc_constant_string_object_section, | |
| 103 objc_selector_refs_section, | |
| 104 objc_selector_fixup_section, | |
| 105 objc_cls_refs_section, | |
| 106 objc_class_section, | |
| 107 objc_meta_class_section, | |
| 108 /* shared, hot -> cold */ | |
| 109 objc_cls_meth_section, | |
| 110 objc_inst_meth_section, | |
| 111 objc_protocol_section, | |
| 112 objc_class_names_section, | |
| 113 objc_meth_var_types_section, | |
| 114 objc_meth_var_names_section, | |
| 115 objc_category_section, | |
| 116 objc_class_vars_section, | |
| 117 objc_instance_vars_section, | |
| 118 objc_module_info_section, | |
| 119 objc_symbols_section | |
| 120 }; | |
| 121 size_t i; | |
| 122 | |
| 123 been_here = true; | |
| 124 for (i = 0; i < ARRAY_SIZE (tomark); i++) | |
| 125 switch_to_section (darwin_sections[tomark[i]]); | |
| 126 } | |
| 127 output_section_asm_op (directive); | |
| 128 } | |
| 129 | |
| 130 /* Implement TARGET_ASM_INIT_SECTIONS. */ | |
| 131 | |
| 132 void | |
| 133 darwin_init_sections (void) | |
| 134 { | |
| 135 #define DEF_SECTION(NAME, FLAGS, DIRECTIVE, OBJC) \ | |
| 136 darwin_sections[NAME] = \ | |
| 137 get_unnamed_section (FLAGS, (OBJC \ | |
| 138 ? output_objc_section_asm_op \ | |
| 139 : output_section_asm_op), \ | |
| 140 "\t" DIRECTIVE); | |
| 141 #include "config/darwin-sections.def" | |
| 142 #undef DEF_SECTION | |
| 143 | |
| 144 readonly_data_section = darwin_sections[const_section]; | |
| 145 exception_section = darwin_sections[darwin_exception_section]; | |
| 146 eh_frame_section = darwin_sections[darwin_eh_frame_section]; | |
| 147 } | |
| 148 | |
| 149 int | |
| 150 name_needs_quotes (const char *name) | |
| 151 { | |
| 152 int c; | |
| 153 while ((c = *name++) != '\0') | |
| 154 if (! ISIDNUM (c) && c != '.' && c != '$') | |
| 155 return 1; | |
| 156 return 0; | |
| 157 } | |
| 158 | |
| 159 /* Return true if SYM_REF can be used without an indirection. */ | |
| 160 static int | |
| 161 machopic_symbol_defined_p (rtx sym_ref) | |
| 162 { | |
| 163 if (SYMBOL_REF_FLAGS (sym_ref) & MACHO_SYMBOL_FLAG_DEFINED) | |
| 164 return true; | |
| 165 | |
| 166 /* If a symbol references local and is not an extern to this | |
| 167 file, then the symbol might be able to declared as defined. */ | |
| 168 if (SYMBOL_REF_LOCAL_P (sym_ref) && ! SYMBOL_REF_EXTERNAL_P (sym_ref)) | |
| 169 { | |
| 170 /* If the symbol references a variable and the variable is a | |
| 171 common symbol, then this symbol is not defined. */ | |
| 172 if (SYMBOL_REF_FLAGS (sym_ref) & MACHO_SYMBOL_FLAG_VARIABLE) | |
| 173 { | |
| 174 tree decl = SYMBOL_REF_DECL (sym_ref); | |
| 175 if (!decl) | |
| 176 return true; | |
| 177 if (DECL_COMMON (decl)) | |
| 178 return false; | |
| 179 } | |
| 180 return true; | |
| 181 } | |
| 182 return false; | |
| 183 } | |
| 184 | |
| 185 /* This module assumes that (const (symbol_ref "foo")) is a legal pic | |
| 186 reference, which will not be changed. */ | |
| 187 | |
| 188 enum machopic_addr_class | |
| 189 machopic_classify_symbol (rtx sym_ref) | |
| 190 { | |
| 191 int flags; | |
| 192 bool function_p; | |
| 193 | |
| 194 flags = SYMBOL_REF_FLAGS (sym_ref); | |
| 195 function_p = SYMBOL_REF_FUNCTION_P (sym_ref); | |
| 196 if (machopic_symbol_defined_p (sym_ref)) | |
| 197 return (function_p | |
| 198 ? MACHOPIC_DEFINED_FUNCTION : MACHOPIC_DEFINED_DATA); | |
| 199 else | |
| 200 return (function_p | |
| 201 ? MACHOPIC_UNDEFINED_FUNCTION : MACHOPIC_UNDEFINED_DATA); | |
| 202 } | |
| 203 | |
| 204 #ifndef TARGET_FIX_AND_CONTINUE | |
| 205 #define TARGET_FIX_AND_CONTINUE 0 | |
| 206 #endif | |
| 207 | |
| 208 /* Indicate when fix-and-continue style code generation is being used | |
| 209 and when a reference to data should be indirected so that it can be | |
| 210 rebound in a new translation unit to reference the original instance | |
| 211 of that data. Symbol names that are for code generation local to | |
| 212 the translation unit are bound to the new translation unit; | |
| 213 currently this means symbols that begin with L or _OBJC_; | |
| 214 otherwise, we indicate that an indirect reference should be made to | |
| 215 permit the runtime to rebind new instances of the translation unit | |
| 216 to the original instance of the data. */ | |
| 217 | |
| 218 static int | |
| 219 indirect_data (rtx sym_ref) | |
| 220 { | |
| 221 int lprefix; | |
| 222 const char *name; | |
| 223 | |
| 224 /* If we aren't generating fix-and-continue code, don't do anything | |
| 225 special. */ | |
| 226 if (TARGET_FIX_AND_CONTINUE == 0) | |
| 227 return 0; | |
| 228 | |
| 229 /* Otherwise, all symbol except symbols that begin with L or _OBJC_ | |
| 230 are indirected. Symbols that begin with L and _OBJC_ are always | |
| 231 bound to the current translation unit as they are used for | |
| 232 generated local data of the translation unit. */ | |
| 233 | |
| 234 name = XSTR (sym_ref, 0); | |
| 235 | |
| 236 lprefix = (((name[0] == '*' || name[0] == '&') | |
| 237 && (name[1] == 'L' || (name[1] == '"' && name[2] == 'L'))) | |
| 238 || (strncmp (name, "_OBJC_", 6) == 0)); | |
| 239 | |
| 240 return ! lprefix; | |
| 241 } | |
| 242 | |
| 243 | |
| 244 static int | |
| 245 machopic_data_defined_p (rtx sym_ref) | |
| 246 { | |
| 247 if (indirect_data (sym_ref)) | |
| 248 return 0; | |
| 249 | |
| 250 switch (machopic_classify_symbol (sym_ref)) | |
| 251 { | |
| 252 case MACHOPIC_DEFINED_DATA: | |
| 253 case MACHOPIC_DEFINED_FUNCTION: | |
| 254 return 1; | |
| 255 default: | |
| 256 return 0; | |
| 257 } | |
| 258 } | |
| 259 | |
| 260 void | |
| 261 machopic_define_symbol (rtx mem) | |
| 262 { | |
| 263 rtx sym_ref; | |
| 264 | |
| 265 gcc_assert (GET_CODE (mem) == MEM); | |
| 266 sym_ref = XEXP (mem, 0); | |
| 267 SYMBOL_REF_FLAGS (sym_ref) |= MACHO_SYMBOL_FLAG_DEFINED; | |
| 268 } | |
| 269 | |
| 270 /* Return either ORIG or: | |
| 271 | |
| 272 (const:P (unspec:P [ORIG] UNSPEC_MACHOPIC_OFFSET)) | |
| 273 | |
| 274 depending on MACHO_DYNAMIC_NO_PIC_P. */ | |
| 275 rtx | |
| 276 machopic_gen_offset (rtx orig) | |
| 277 { | |
| 278 if (MACHO_DYNAMIC_NO_PIC_P) | |
| 279 return orig; | |
| 280 else | |
| 281 { | |
| 282 /* Play games to avoid marking the function as needing pic if we | |
| 283 are being called as part of the cost-estimation process. */ | |
|
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
284 if (current_ir_type () != IR_GIMPLE || currently_expanding_to_rtl) |
| 0 | 285 crtl->uses_pic_offset_table = 1; |
| 286 orig = gen_rtx_UNSPEC (Pmode, gen_rtvec (1, orig), | |
| 287 UNSPEC_MACHOPIC_OFFSET); | |
| 288 return gen_rtx_CONST (Pmode, orig); | |
| 289 } | |
| 290 } | |
| 291 | |
| 292 static GTY(()) const char * function_base_func_name; | |
| 293 static GTY(()) int current_pic_label_num; | |
| 294 | |
| 295 void | |
| 296 machopic_output_function_base_name (FILE *file) | |
| 297 { | |
| 298 const char *current_name; | |
| 299 | |
| 300 /* If dynamic-no-pic is on, we should not get here. */ | |
| 301 gcc_assert (!MACHO_DYNAMIC_NO_PIC_P); | |
| 302 current_name = | |
| 303 IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (current_function_decl)); | |
| 304 if (function_base_func_name != current_name) | |
| 305 { | |
| 306 ++current_pic_label_num; | |
| 307 function_base_func_name = current_name; | |
| 308 } | |
| 309 fprintf (file, "\"L%011d$pb\"", current_pic_label_num); | |
| 310 } | |
| 311 | |
| 312 /* The suffix attached to non-lazy pointer symbols. */ | |
| 313 #define NON_LAZY_POINTER_SUFFIX "$non_lazy_ptr" | |
| 314 /* The suffix attached to stub symbols. */ | |
| 315 #define STUB_SUFFIX "$stub" | |
| 316 | |
|
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
317 typedef struct GTY (()) machopic_indirection |
| 0 | 318 { |
| 319 /* The SYMBOL_REF for the entity referenced. */ | |
| 320 rtx symbol; | |
| 321 /* The name of the stub or non-lazy pointer. */ | |
| 322 const char * ptr_name; | |
| 323 /* True iff this entry is for a stub (as opposed to a non-lazy | |
| 324 pointer). */ | |
| 325 bool stub_p; | |
| 326 /* True iff this stub or pointer pointer has been referenced. */ | |
| 327 bool used; | |
| 328 } machopic_indirection; | |
| 329 | |
| 330 /* A table mapping stub names and non-lazy pointer names to | |
| 331 SYMBOL_REFs for the stubbed-to and pointed-to entities. */ | |
| 332 | |
| 333 static GTY ((param_is (struct machopic_indirection))) htab_t | |
| 334 machopic_indirections; | |
| 335 | |
| 336 /* Return a hash value for a SLOT in the indirections hash table. */ | |
| 337 | |
| 338 static hashval_t | |
| 339 machopic_indirection_hash (const void *slot) | |
| 340 { | |
| 341 const machopic_indirection *p = (const machopic_indirection *) slot; | |
| 342 return htab_hash_string (p->ptr_name); | |
| 343 } | |
| 344 | |
| 345 /* Returns true if the KEY is the same as that associated with | |
| 346 SLOT. */ | |
| 347 | |
| 348 static int | |
| 349 machopic_indirection_eq (const void *slot, const void *key) | |
| 350 { | |
| 351 return strcmp (((const machopic_indirection *) slot)->ptr_name, | |
| 352 (const char *) key) == 0; | |
| 353 } | |
| 354 | |
| 355 /* Return the name of the non-lazy pointer (if STUB_P is false) or | |
| 356 stub (if STUB_B is true) corresponding to the given name. */ | |
| 357 | |
| 358 const char * | |
| 359 machopic_indirection_name (rtx sym_ref, bool stub_p) | |
| 360 { | |
| 361 char *buffer; | |
| 362 const char *name = XSTR (sym_ref, 0); | |
| 363 size_t namelen = strlen (name); | |
| 364 machopic_indirection *p; | |
| 365 void ** slot; | |
| 366 bool saw_star = false; | |
| 367 bool needs_quotes; | |
| 368 const char *suffix; | |
| 369 const char *prefix = user_label_prefix; | |
| 370 const char *quote = ""; | |
| 371 tree id; | |
| 372 | |
| 373 id = maybe_get_identifier (name); | |
| 374 if (id) | |
| 375 { | |
| 376 tree id_orig = id; | |
| 377 | |
| 378 while (IDENTIFIER_TRANSPARENT_ALIAS (id)) | |
| 379 id = TREE_CHAIN (id); | |
| 380 if (id != id_orig) | |
| 381 { | |
| 382 name = IDENTIFIER_POINTER (id); | |
| 383 namelen = strlen (name); | |
| 384 } | |
| 385 } | |
| 386 | |
| 387 if (name[0] == '*') | |
| 388 { | |
| 389 saw_star = true; | |
| 390 prefix = ""; | |
| 391 ++name; | |
| 392 --namelen; | |
| 393 } | |
| 394 | |
| 395 needs_quotes = name_needs_quotes (name); | |
| 396 if (needs_quotes) | |
| 397 { | |
| 398 quote = "\""; | |
| 399 } | |
| 400 | |
| 401 if (stub_p) | |
| 402 suffix = STUB_SUFFIX; | |
| 403 else | |
| 404 suffix = NON_LAZY_POINTER_SUFFIX; | |
| 405 | |
| 406 buffer = XALLOCAVEC (char, strlen ("&L") | |
| 407 + strlen (prefix) | |
| 408 + namelen | |
| 409 + strlen (suffix) | |
| 410 + 2 * strlen (quote) | |
| 411 + 1 /* '\0' */); | |
| 412 | |
| 413 /* Construct the name of the non-lazy pointer or stub. */ | |
| 414 sprintf (buffer, "&%sL%s%s%s%s", quote, prefix, name, suffix, quote); | |
| 415 | |
| 416 if (!machopic_indirections) | |
| 417 machopic_indirections = htab_create_ggc (37, | |
| 418 machopic_indirection_hash, | |
| 419 machopic_indirection_eq, | |
| 420 /*htab_del=*/NULL); | |
| 421 | |
| 422 slot = htab_find_slot_with_hash (machopic_indirections, buffer, | |
| 423 htab_hash_string (buffer), INSERT); | |
| 424 if (*slot) | |
| 425 { | |
| 426 p = (machopic_indirection *) *slot; | |
| 427 } | |
| 428 else | |
| 429 { | |
| 430 p = (machopic_indirection *) ggc_alloc (sizeof (machopic_indirection)); | |
| 431 p->symbol = sym_ref; | |
| 432 p->ptr_name = xstrdup (buffer); | |
| 433 p->stub_p = stub_p; | |
| 434 p->used = false; | |
| 435 *slot = p; | |
| 436 } | |
| 437 | |
| 438 return p->ptr_name; | |
| 439 } | |
| 440 | |
| 441 /* Return the name of the stub for the mcount function. */ | |
| 442 | |
| 443 const char* | |
| 444 machopic_mcount_stub_name (void) | |
| 445 { | |
| 446 rtx symbol = gen_rtx_SYMBOL_REF (Pmode, "*mcount"); | |
| 447 return machopic_indirection_name (symbol, /*stub_p=*/true); | |
| 448 } | |
| 449 | |
| 450 /* If NAME is the name of a stub or a non-lazy pointer , mark the stub | |
| 451 or non-lazy pointer as used -- and mark the object to which the | |
| 452 pointer/stub refers as used as well, since the pointer/stub will | |
| 453 emit a reference to it. */ | |
| 454 | |
| 455 void | |
| 456 machopic_validate_stub_or_non_lazy_ptr (const char *name) | |
| 457 { | |
| 458 machopic_indirection *p; | |
| 459 | |
| 460 p = ((machopic_indirection *) | |
| 461 (htab_find_with_hash (machopic_indirections, name, | |
| 462 htab_hash_string (name)))); | |
| 463 if (p && ! p->used) | |
| 464 { | |
| 465 const char *real_name; | |
| 466 tree id; | |
| 467 | |
| 468 p->used = true; | |
| 469 | |
| 470 /* Do what output_addr_const will do when we actually call it. */ | |
| 471 if (SYMBOL_REF_DECL (p->symbol)) | |
| 472 mark_decl_referenced (SYMBOL_REF_DECL (p->symbol)); | |
| 473 | |
| 474 real_name = targetm.strip_name_encoding (XSTR (p->symbol, 0)); | |
| 475 | |
| 476 id = maybe_get_identifier (real_name); | |
| 477 if (id) | |
| 478 mark_referenced (id); | |
| 479 } | |
| 480 } | |
| 481 | |
| 482 /* Transform ORIG, which may be any data source, to the corresponding | |
| 483 source using indirections. */ | |
| 484 | |
| 485 rtx | |
| 486 machopic_indirect_data_reference (rtx orig, rtx reg) | |
| 487 { | |
| 488 rtx ptr_ref = orig; | |
| 489 | |
| 490 if (! MACHOPIC_INDIRECT) | |
| 491 return orig; | |
| 492 | |
| 493 if (GET_CODE (orig) == SYMBOL_REF) | |
| 494 { | |
| 495 int defined = machopic_data_defined_p (orig); | |
| 496 | |
| 497 if (defined && MACHO_DYNAMIC_NO_PIC_P) | |
| 498 { | |
| 499 #if defined (TARGET_TOC) | |
| 500 /* Create a new register for CSE opportunities. */ | |
| 501 rtx hi_reg = (!can_create_pseudo_p () ? reg : gen_reg_rtx (Pmode)); | |
| 502 emit_insn (gen_macho_high (hi_reg, orig)); | |
| 503 emit_insn (gen_macho_low (reg, hi_reg, orig)); | |
| 504 #else | |
| 505 /* some other cpu -- writeme! */ | |
| 506 gcc_unreachable (); | |
| 507 #endif | |
| 508 return reg; | |
| 509 } | |
| 510 else if (defined) | |
| 511 { | |
| 512 #if defined (TARGET_TOC) || defined (HAVE_lo_sum) | |
| 513 rtx offset = machopic_gen_offset (orig); | |
| 514 #endif | |
| 515 | |
| 516 #if defined (TARGET_TOC) /* i.e., PowerPC */ | |
| 517 rtx hi_sum_reg = (!can_create_pseudo_p () | |
| 518 ? reg | |
| 519 : gen_reg_rtx (Pmode)); | |
| 520 | |
| 521 gcc_assert (reg); | |
| 522 | |
| 523 emit_insn (gen_rtx_SET (Pmode, hi_sum_reg, | |
| 524 gen_rtx_PLUS (Pmode, pic_offset_table_rtx, | |
| 525 gen_rtx_HIGH (Pmode, offset)))); | |
| 526 emit_insn (gen_rtx_SET (Pmode, reg, | |
| 527 gen_rtx_LO_SUM (Pmode, hi_sum_reg, | |
| 528 copy_rtx (offset)))); | |
| 529 | |
| 530 orig = reg; | |
| 531 #else | |
| 532 #if defined (HAVE_lo_sum) | |
| 533 gcc_assert (reg); | |
| 534 | |
| 535 emit_insn (gen_rtx_SET (VOIDmode, reg, | |
| 536 gen_rtx_HIGH (Pmode, offset))); | |
| 537 emit_insn (gen_rtx_SET (VOIDmode, reg, | |
| 538 gen_rtx_LO_SUM (Pmode, reg, | |
| 539 copy_rtx (offset)))); | |
| 540 emit_use (pic_offset_table_rtx); | |
| 541 | |
| 542 orig = gen_rtx_PLUS (Pmode, pic_offset_table_rtx, reg); | |
| 543 #endif | |
| 544 #endif | |
| 545 return orig; | |
| 546 } | |
| 547 | |
| 548 ptr_ref = (gen_rtx_SYMBOL_REF | |
| 549 (Pmode, | |
| 550 machopic_indirection_name (orig, /*stub_p=*/false))); | |
| 551 | |
| 552 SYMBOL_REF_DATA (ptr_ref) = SYMBOL_REF_DATA (orig); | |
| 553 | |
| 554 ptr_ref = gen_const_mem (Pmode, ptr_ref); | |
| 555 machopic_define_symbol (ptr_ref); | |
| 556 | |
| 557 return ptr_ref; | |
| 558 } | |
| 559 else if (GET_CODE (orig) == CONST) | |
| 560 { | |
| 561 rtx base, result; | |
| 562 | |
| 563 /* legitimize both operands of the PLUS */ | |
| 564 if (GET_CODE (XEXP (orig, 0)) == PLUS) | |
| 565 { | |
| 566 base = machopic_indirect_data_reference (XEXP (XEXP (orig, 0), 0), | |
| 567 reg); | |
| 568 orig = machopic_indirect_data_reference (XEXP (XEXP (orig, 0), 1), | |
| 569 (base == reg ? 0 : reg)); | |
| 570 } | |
| 571 else | |
| 572 return orig; | |
| 573 | |
| 574 if (MACHOPIC_PURE && GET_CODE (orig) == CONST_INT) | |
| 575 result = plus_constant (base, INTVAL (orig)); | |
| 576 else | |
| 577 result = gen_rtx_PLUS (Pmode, base, orig); | |
| 578 | |
| 579 if (MACHOPIC_JUST_INDIRECT && GET_CODE (base) == MEM) | |
| 580 { | |
| 581 if (reg) | |
| 582 { | |
| 583 emit_move_insn (reg, result); | |
| 584 result = reg; | |
| 585 } | |
| 586 else | |
| 587 { | |
| 588 result = force_reg (GET_MODE (result), result); | |
| 589 } | |
| 590 } | |
| 591 | |
| 592 return result; | |
| 593 | |
| 594 } | |
| 595 else if (GET_CODE (orig) == MEM) | |
| 596 XEXP (ptr_ref, 0) = machopic_indirect_data_reference (XEXP (orig, 0), reg); | |
| 597 /* When the target is i386, this code prevents crashes due to the | |
| 598 compiler's ignorance on how to move the PIC base register to | |
| 599 other registers. (The reload phase sometimes introduces such | |
| 600 insns.) */ | |
| 601 else if (GET_CODE (orig) == PLUS | |
| 602 && GET_CODE (XEXP (orig, 0)) == REG | |
| 603 && REGNO (XEXP (orig, 0)) == PIC_OFFSET_TABLE_REGNUM | |
| 604 #ifdef I386 | |
| 605 /* Prevent the same register from being erroneously used | |
| 606 as both the base and index registers. */ | |
| 607 && GET_CODE (XEXP (orig, 1)) == CONST | |
| 608 #endif | |
| 609 && reg) | |
| 610 { | |
| 611 emit_move_insn (reg, XEXP (orig, 0)); | |
| 612 XEXP (ptr_ref, 0) = reg; | |
| 613 } | |
| 614 return ptr_ref; | |
| 615 } | |
| 616 | |
| 617 /* Transform TARGET (a MEM), which is a function call target, to the | |
| 618 corresponding symbol_stub if necessary. Return a new MEM. */ | |
| 619 | |
| 620 rtx | |
| 621 machopic_indirect_call_target (rtx target) | |
| 622 { | |
| 623 if (GET_CODE (target) != MEM) | |
| 624 return target; | |
| 625 | |
| 626 if (MACHOPIC_INDIRECT | |
| 627 && GET_CODE (XEXP (target, 0)) == SYMBOL_REF | |
| 628 && !(SYMBOL_REF_FLAGS (XEXP (target, 0)) | |
| 629 & MACHO_SYMBOL_FLAG_DEFINED)) | |
| 630 { | |
| 631 rtx sym_ref = XEXP (target, 0); | |
| 632 const char *stub_name = machopic_indirection_name (sym_ref, | |
| 633 /*stub_p=*/true); | |
| 634 enum machine_mode mode = GET_MODE (sym_ref); | |
| 635 | |
| 636 XEXP (target, 0) = gen_rtx_SYMBOL_REF (mode, stub_name); | |
| 637 SYMBOL_REF_DATA (XEXP (target, 0)) = SYMBOL_REF_DATA (sym_ref); | |
| 638 MEM_READONLY_P (target) = 1; | |
| 639 MEM_NOTRAP_P (target) = 1; | |
| 640 } | |
| 641 | |
| 642 return target; | |
| 643 } | |
| 644 | |
| 645 rtx | |
| 646 machopic_legitimize_pic_address (rtx orig, enum machine_mode mode, rtx reg) | |
| 647 { | |
| 648 rtx pic_ref = orig; | |
| 649 | |
| 650 if (! MACHOPIC_INDIRECT) | |
| 651 return orig; | |
| 652 | |
| 653 /* First handle a simple SYMBOL_REF or LABEL_REF */ | |
| 654 if (GET_CODE (orig) == LABEL_REF | |
| 655 || (GET_CODE (orig) == SYMBOL_REF | |
| 656 )) | |
| 657 { | |
| 658 /* addr(foo) = &func+(foo-func) */ | |
| 659 orig = machopic_indirect_data_reference (orig, reg); | |
| 660 | |
| 661 if (GET_CODE (orig) == PLUS | |
| 662 && GET_CODE (XEXP (orig, 0)) == REG) | |
| 663 { | |
| 664 if (reg == 0) | |
| 665 return force_reg (mode, orig); | |
| 666 | |
| 667 emit_move_insn (reg, orig); | |
| 668 return reg; | |
| 669 } | |
| 670 | |
| 671 if (GET_CODE (orig) == MEM) | |
| 672 { | |
| 673 if (reg == 0) | |
| 674 { | |
| 675 gcc_assert (!reload_in_progress); | |
| 676 reg = gen_reg_rtx (Pmode); | |
| 677 } | |
| 678 | |
| 679 #ifdef HAVE_lo_sum | |
| 680 if (MACHO_DYNAMIC_NO_PIC_P | |
| 681 && (GET_CODE (XEXP (orig, 0)) == SYMBOL_REF | |
| 682 || GET_CODE (XEXP (orig, 0)) == LABEL_REF)) | |
| 683 { | |
| 684 #if defined (TARGET_TOC) /* ppc */ | |
| 685 rtx temp_reg = (!can_create_pseudo_p () | |
| 686 ? reg : | |
| 687 gen_reg_rtx (Pmode)); | |
| 688 rtx asym = XEXP (orig, 0); | |
| 689 rtx mem; | |
| 690 | |
| 691 emit_insn (gen_macho_high (temp_reg, asym)); | |
| 692 mem = gen_const_mem (GET_MODE (orig), | |
| 693 gen_rtx_LO_SUM (Pmode, temp_reg, | |
| 694 copy_rtx (asym))); | |
| 695 emit_insn (gen_rtx_SET (VOIDmode, reg, mem)); | |
| 696 #else | |
| 697 /* Some other CPU -- WriteMe! but right now there are no other | |
| 698 platforms that can use dynamic-no-pic */ | |
| 699 gcc_unreachable (); | |
| 700 #endif | |
| 701 pic_ref = reg; | |
| 702 } | |
| 703 else | |
| 704 if (GET_CODE (XEXP (orig, 0)) == SYMBOL_REF | |
| 705 || GET_CODE (XEXP (orig, 0)) == LABEL_REF) | |
| 706 { | |
| 707 rtx offset = machopic_gen_offset (XEXP (orig, 0)); | |
| 708 #if defined (TARGET_TOC) /* i.e., PowerPC */ | |
| 709 /* Generating a new reg may expose opportunities for | |
| 710 common subexpression elimination. */ | |
| 711 rtx hi_sum_reg = (!can_create_pseudo_p () | |
| 712 ? reg | |
| 713 : gen_reg_rtx (Pmode)); | |
| 714 rtx mem; | |
| 715 rtx insn; | |
| 716 rtx sum; | |
| 717 | |
| 718 sum = gen_rtx_HIGH (Pmode, offset); | |
| 719 if (! MACHO_DYNAMIC_NO_PIC_P) | |
| 720 sum = gen_rtx_PLUS (Pmode, pic_offset_table_rtx, sum); | |
| 721 | |
| 722 emit_insn (gen_rtx_SET (Pmode, hi_sum_reg, sum)); | |
| 723 | |
| 724 mem = gen_const_mem (GET_MODE (orig), | |
| 725 gen_rtx_LO_SUM (Pmode, | |
| 726 hi_sum_reg, | |
| 727 copy_rtx (offset))); | |
| 728 insn = emit_insn (gen_rtx_SET (VOIDmode, reg, mem)); | |
| 729 set_unique_reg_note (insn, REG_EQUAL, pic_ref); | |
| 730 | |
| 731 pic_ref = reg; | |
| 732 #else | |
| 733 emit_use (gen_rtx_REG (Pmode, PIC_OFFSET_TABLE_REGNUM)); | |
| 734 | |
| 735 emit_insn (gen_rtx_SET (VOIDmode, reg, | |
| 736 gen_rtx_HIGH (Pmode, | |
| 737 gen_rtx_CONST (Pmode, | |
| 738 offset)))); | |
| 739 emit_insn (gen_rtx_SET (VOIDmode, reg, | |
| 740 gen_rtx_LO_SUM (Pmode, reg, | |
| 741 gen_rtx_CONST (Pmode, | |
| 742 copy_rtx (offset))))); | |
| 743 pic_ref = gen_rtx_PLUS (Pmode, | |
| 744 pic_offset_table_rtx, reg); | |
| 745 #endif | |
| 746 } | |
| 747 else | |
| 748 #endif /* HAVE_lo_sum */ | |
| 749 { | |
| 750 rtx pic = pic_offset_table_rtx; | |
| 751 if (GET_CODE (pic) != REG) | |
| 752 { | |
| 753 emit_move_insn (reg, pic); | |
| 754 pic = reg; | |
| 755 } | |
| 756 #if 0 | |
| 757 emit_use (gen_rtx_REG (Pmode, PIC_OFFSET_TABLE_REGNUM)); | |
| 758 #endif | |
| 759 | |
| 760 if (reload_in_progress) | |
| 761 df_set_regs_ever_live (REGNO (pic), true); | |
| 762 pic_ref = gen_rtx_PLUS (Pmode, pic, | |
| 763 machopic_gen_offset (XEXP (orig, 0))); | |
| 764 } | |
| 765 | |
| 766 #if !defined (TARGET_TOC) | |
| 767 emit_move_insn (reg, pic_ref); | |
| 768 pic_ref = gen_const_mem (GET_MODE (orig), reg); | |
| 769 #endif | |
| 770 } | |
| 771 else | |
| 772 { | |
| 773 | |
| 774 #ifdef HAVE_lo_sum | |
| 775 if (GET_CODE (orig) == SYMBOL_REF | |
| 776 || GET_CODE (orig) == LABEL_REF) | |
| 777 { | |
| 778 rtx offset = machopic_gen_offset (orig); | |
| 779 #if defined (TARGET_TOC) /* i.e., PowerPC */ | |
| 780 rtx hi_sum_reg; | |
| 781 | |
| 782 if (reg == 0) | |
| 783 { | |
| 784 gcc_assert (!reload_in_progress); | |
| 785 reg = gen_reg_rtx (Pmode); | |
| 786 } | |
| 787 | |
| 788 hi_sum_reg = reg; | |
| 789 | |
| 790 emit_insn (gen_rtx_SET (Pmode, hi_sum_reg, | |
| 791 (MACHO_DYNAMIC_NO_PIC_P) | |
| 792 ? gen_rtx_HIGH (Pmode, offset) | |
| 793 : gen_rtx_PLUS (Pmode, | |
| 794 pic_offset_table_rtx, | |
| 795 gen_rtx_HIGH (Pmode, | |
| 796 offset)))); | |
| 797 emit_insn (gen_rtx_SET (VOIDmode, reg, | |
| 798 gen_rtx_LO_SUM (Pmode, | |
| 799 hi_sum_reg, | |
| 800 copy_rtx (offset)))); | |
| 801 pic_ref = reg; | |
| 802 #else | |
| 803 emit_insn (gen_rtx_SET (VOIDmode, reg, | |
| 804 gen_rtx_HIGH (Pmode, offset))); | |
| 805 emit_insn (gen_rtx_SET (VOIDmode, reg, | |
| 806 gen_rtx_LO_SUM (Pmode, reg, | |
| 807 copy_rtx (offset)))); | |
| 808 pic_ref = gen_rtx_PLUS (Pmode, | |
| 809 pic_offset_table_rtx, reg); | |
| 810 #endif | |
| 811 } | |
| 812 else | |
| 813 #endif /* HAVE_lo_sum */ | |
| 814 { | |
| 815 if (REG_P (orig) | |
| 816 || GET_CODE (orig) == SUBREG) | |
| 817 { | |
| 818 return orig; | |
| 819 } | |
| 820 else | |
| 821 { | |
| 822 rtx pic = pic_offset_table_rtx; | |
| 823 if (GET_CODE (pic) != REG) | |
| 824 { | |
| 825 emit_move_insn (reg, pic); | |
| 826 pic = reg; | |
| 827 } | |
| 828 #if 0 | |
| 829 emit_use (pic_offset_table_rtx); | |
| 830 #endif | |
| 831 if (reload_in_progress) | |
| 832 df_set_regs_ever_live (REGNO (pic), true); | |
| 833 pic_ref = gen_rtx_PLUS (Pmode, | |
| 834 pic, | |
| 835 machopic_gen_offset (orig)); | |
| 836 } | |
| 837 } | |
| 838 } | |
| 839 | |
| 840 if (GET_CODE (pic_ref) != REG) | |
| 841 { | |
| 842 if (reg != 0) | |
| 843 { | |
| 844 emit_move_insn (reg, pic_ref); | |
| 845 return reg; | |
| 846 } | |
| 847 else | |
| 848 { | |
| 849 return force_reg (mode, pic_ref); | |
| 850 } | |
| 851 } | |
| 852 else | |
| 853 { | |
| 854 return pic_ref; | |
| 855 } | |
| 856 } | |
| 857 | |
| 858 else if (GET_CODE (orig) == SYMBOL_REF) | |
| 859 return orig; | |
| 860 | |
| 861 else if (GET_CODE (orig) == PLUS | |
| 862 && (GET_CODE (XEXP (orig, 0)) == MEM | |
| 863 || GET_CODE (XEXP (orig, 0)) == SYMBOL_REF | |
| 864 || GET_CODE (XEXP (orig, 0)) == LABEL_REF) | |
| 865 && XEXP (orig, 0) != pic_offset_table_rtx | |
| 866 && GET_CODE (XEXP (orig, 1)) != REG) | |
| 867 | |
| 868 { | |
| 869 rtx base; | |
| 870 int is_complex = (GET_CODE (XEXP (orig, 0)) == MEM); | |
| 871 | |
| 872 base = machopic_legitimize_pic_address (XEXP (orig, 0), Pmode, reg); | |
| 873 orig = machopic_legitimize_pic_address (XEXP (orig, 1), | |
| 874 Pmode, (base == reg ? 0 : reg)); | |
| 875 if (GET_CODE (orig) == CONST_INT) | |
| 876 { | |
| 877 pic_ref = plus_constant (base, INTVAL (orig)); | |
| 878 is_complex = 1; | |
| 879 } | |
| 880 else | |
| 881 pic_ref = gen_rtx_PLUS (Pmode, base, orig); | |
| 882 | |
| 883 if (reg && is_complex) | |
| 884 { | |
| 885 emit_move_insn (reg, pic_ref); | |
| 886 pic_ref = reg; | |
| 887 } | |
| 888 /* Likewise, should we set special REG_NOTEs here? */ | |
| 889 } | |
| 890 | |
| 891 else if (GET_CODE (orig) == CONST) | |
| 892 { | |
| 893 return machopic_legitimize_pic_address (XEXP (orig, 0), Pmode, reg); | |
| 894 } | |
| 895 | |
| 896 else if (GET_CODE (orig) == MEM | |
| 897 && GET_CODE (XEXP (orig, 0)) == SYMBOL_REF) | |
| 898 { | |
| 899 rtx addr = machopic_legitimize_pic_address (XEXP (orig, 0), Pmode, reg); | |
| 900 addr = replace_equiv_address (orig, addr); | |
| 901 emit_move_insn (reg, addr); | |
| 902 pic_ref = reg; | |
| 903 } | |
| 904 | |
| 905 return pic_ref; | |
| 906 } | |
| 907 | |
| 908 /* Output the stub or non-lazy pointer in *SLOT, if it has been used. | |
| 909 DATA is the FILE* for assembly output. Called from | |
| 910 htab_traverse. */ | |
| 911 | |
| 912 static int | |
| 913 machopic_output_indirection (void **slot, void *data) | |
| 914 { | |
| 915 machopic_indirection *p = *((machopic_indirection **) slot); | |
| 916 FILE *asm_out_file = (FILE *) data; | |
| 917 rtx symbol; | |
| 918 const char *sym_name; | |
| 919 const char *ptr_name; | |
| 920 | |
| 921 if (!p->used) | |
| 922 return 1; | |
| 923 | |
| 924 symbol = p->symbol; | |
| 925 sym_name = XSTR (symbol, 0); | |
| 926 ptr_name = p->ptr_name; | |
| 927 | |
| 928 if (p->stub_p) | |
| 929 { | |
| 930 char *sym; | |
| 931 char *stub; | |
| 932 tree id; | |
| 933 | |
| 934 id = maybe_get_identifier (sym_name); | |
| 935 if (id) | |
| 936 { | |
| 937 tree id_orig = id; | |
| 938 | |
| 939 while (IDENTIFIER_TRANSPARENT_ALIAS (id)) | |
| 940 id = TREE_CHAIN (id); | |
| 941 if (id != id_orig) | |
| 942 sym_name = IDENTIFIER_POINTER (id); | |
| 943 } | |
| 944 | |
| 945 sym = XALLOCAVEC (char, strlen (sym_name) + 2); | |
| 946 if (sym_name[0] == '*' || sym_name[0] == '&') | |
| 947 strcpy (sym, sym_name + 1); | |
| 948 else if (sym_name[0] == '-' || sym_name[0] == '+') | |
| 949 strcpy (sym, sym_name); | |
| 950 else | |
| 951 sprintf (sym, "%s%s", user_label_prefix, sym_name); | |
| 952 | |
| 953 stub = XALLOCAVEC (char, strlen (ptr_name) + 2); | |
| 954 if (ptr_name[0] == '*' || ptr_name[0] == '&') | |
| 955 strcpy (stub, ptr_name + 1); | |
| 956 else | |
| 957 sprintf (stub, "%s%s", user_label_prefix, ptr_name); | |
| 958 | |
| 959 machopic_output_stub (asm_out_file, sym, stub); | |
| 960 } | |
| 961 else if (! indirect_data (symbol) | |
| 962 && (machopic_symbol_defined_p (symbol) | |
| 963 || SYMBOL_REF_LOCAL_P (symbol))) | |
| 964 { | |
| 965 switch_to_section (data_section); | |
| 966 assemble_align (GET_MODE_ALIGNMENT (Pmode)); | |
| 967 assemble_label (ptr_name); | |
| 968 assemble_integer (gen_rtx_SYMBOL_REF (Pmode, sym_name), | |
| 969 GET_MODE_SIZE (Pmode), | |
| 970 GET_MODE_ALIGNMENT (Pmode), 1); | |
| 971 } | |
| 972 else | |
| 973 { | |
| 974 rtx init = const0_rtx; | |
| 975 | |
| 976 switch_to_section (darwin_sections[machopic_nl_symbol_ptr_section]); | |
| 977 | |
| 978 /* Mach-O symbols are passed around in code through indirect | |
| 979 references and the original symbol_ref hasn't passed through | |
| 980 the generic handling and reference-catching in | |
| 981 output_operand, so we need to manually mark weak references | |
| 982 as such. */ | |
| 983 if (SYMBOL_REF_WEAK (symbol)) | |
| 984 { | |
| 985 tree decl = SYMBOL_REF_DECL (symbol); | |
| 986 gcc_assert (DECL_P (decl)); | |
| 987 | |
| 988 if (decl != NULL_TREE | |
| 989 && DECL_EXTERNAL (decl) && TREE_PUBLIC (decl) | |
| 990 /* Handle only actual external-only definitions, not | |
| 991 e.g. extern inline code or variables for which | |
| 992 storage has been allocated. */ | |
| 993 && !TREE_STATIC (decl)) | |
| 994 { | |
| 995 fputs ("\t.weak_reference ", asm_out_file); | |
| 996 assemble_name (asm_out_file, sym_name); | |
| 997 fputc ('\n', asm_out_file); | |
| 998 } | |
| 999 } | |
| 1000 | |
| 1001 assemble_name (asm_out_file, ptr_name); | |
| 1002 fprintf (asm_out_file, ":\n"); | |
| 1003 | |
| 1004 fprintf (asm_out_file, "\t.indirect_symbol "); | |
| 1005 assemble_name (asm_out_file, sym_name); | |
| 1006 fprintf (asm_out_file, "\n"); | |
| 1007 | |
| 1008 /* Variables that are marked with MACHO_SYMBOL_STATIC need to | |
| 1009 have their symbol name instead of 0 in the second entry of | |
| 1010 the non-lazy symbol pointer data structure when they are | |
| 1011 defined. This allows the runtime to rebind newer instances | |
| 1012 of the translation unit with the original instance of the | |
| 1013 symbol. */ | |
| 1014 | |
| 1015 if ((SYMBOL_REF_FLAGS (symbol) & MACHO_SYMBOL_STATIC) | |
| 1016 && machopic_symbol_defined_p (symbol)) | |
| 1017 init = gen_rtx_SYMBOL_REF (Pmode, sym_name); | |
| 1018 | |
| 1019 assemble_integer (init, GET_MODE_SIZE (Pmode), | |
| 1020 GET_MODE_ALIGNMENT (Pmode), 1); | |
| 1021 } | |
| 1022 | |
| 1023 return 1; | |
| 1024 } | |
| 1025 | |
| 1026 void | |
| 1027 machopic_finish (FILE *asm_out_file) | |
| 1028 { | |
| 1029 if (machopic_indirections) | |
| 1030 htab_traverse_noresize (machopic_indirections, | |
| 1031 machopic_output_indirection, | |
| 1032 asm_out_file); | |
| 1033 } | |
| 1034 | |
| 1035 int | |
| 1036 machopic_operand_p (rtx op) | |
| 1037 { | |
| 1038 if (MACHOPIC_JUST_INDIRECT) | |
| 1039 return (GET_CODE (op) == SYMBOL_REF | |
| 1040 && machopic_symbol_defined_p (op)); | |
| 1041 else | |
| 1042 return (GET_CODE (op) == CONST | |
| 1043 && GET_CODE (XEXP (op, 0)) == UNSPEC | |
| 1044 && XINT (XEXP (op, 0), 1) == UNSPEC_MACHOPIC_OFFSET); | |
| 1045 } | |
| 1046 | |
| 1047 /* This function records whether a given name corresponds to a defined | |
| 1048 or undefined function or variable, for machopic_classify_ident to | |
| 1049 use later. */ | |
| 1050 | |
| 1051 void | |
| 1052 darwin_encode_section_info (tree decl, rtx rtl, int first ATTRIBUTE_UNUSED) | |
| 1053 { | |
| 1054 rtx sym_ref; | |
| 1055 | |
| 1056 /* Do the standard encoding things first. */ | |
| 1057 default_encode_section_info (decl, rtl, first); | |
| 1058 | |
| 1059 if (TREE_CODE (decl) != FUNCTION_DECL && TREE_CODE (decl) != VAR_DECL) | |
| 1060 return; | |
| 1061 | |
| 1062 sym_ref = XEXP (rtl, 0); | |
| 1063 if (TREE_CODE (decl) == VAR_DECL) | |
| 1064 SYMBOL_REF_FLAGS (sym_ref) |= MACHO_SYMBOL_FLAG_VARIABLE; | |
| 1065 | |
| 1066 if (!DECL_EXTERNAL (decl) | |
| 1067 && (!TREE_PUBLIC (decl) || !DECL_WEAK (decl)) | |
| 1068 && ! lookup_attribute ("weakref", DECL_ATTRIBUTES (decl)) | |
| 1069 && ((TREE_STATIC (decl) | |
| 1070 && (!DECL_COMMON (decl) || !TREE_PUBLIC (decl))) | |
| 1071 || (!DECL_COMMON (decl) && DECL_INITIAL (decl) | |
| 1072 && DECL_INITIAL (decl) != error_mark_node))) | |
| 1073 SYMBOL_REF_FLAGS (sym_ref) |= MACHO_SYMBOL_FLAG_DEFINED; | |
| 1074 | |
| 1075 if (! TREE_PUBLIC (decl)) | |
| 1076 SYMBOL_REF_FLAGS (sym_ref) |= MACHO_SYMBOL_STATIC; | |
| 1077 } | |
| 1078 | |
| 1079 void | |
| 1080 darwin_mark_decl_preserved (const char *name) | |
| 1081 { | |
| 1082 fprintf (asm_out_file, ".no_dead_strip "); | |
| 1083 assemble_name (asm_out_file, name); | |
| 1084 fputc ('\n', asm_out_file); | |
| 1085 } | |
| 1086 | |
| 1087 static section * | |
| 1088 darwin_text_section (int reloc, int weak) | |
| 1089 { | |
| 1090 if (reloc) | |
| 1091 return (weak | |
| 1092 ? darwin_sections[text_unlikely_coal_section] | |
| 1093 : unlikely_text_section ()); | |
| 1094 else | |
| 1095 return (weak | |
| 1096 ? darwin_sections[text_coal_section] | |
| 1097 : text_section); | |
| 1098 } | |
| 1099 | |
| 1100 static section * | |
| 1101 darwin_rodata_section (int weak) | |
| 1102 { | |
| 1103 return (weak | |
| 1104 ? darwin_sections[const_coal_section] | |
| 1105 : darwin_sections[const_section]); | |
| 1106 } | |
| 1107 | |
| 1108 static section * | |
| 1109 darwin_mergeable_string_section (tree exp, | |
| 1110 unsigned HOST_WIDE_INT align) | |
| 1111 { | |
| 1112 if (flag_merge_constants | |
| 1113 && TREE_CODE (exp) == STRING_CST | |
| 1114 && TREE_CODE (TREE_TYPE (exp)) == ARRAY_TYPE | |
| 1115 && align <= 256 | |
| 1116 && (int_size_in_bytes (TREE_TYPE (exp)) | |
| 1117 == TREE_STRING_LENGTH (exp)) | |
| 1118 && ((size_t) TREE_STRING_LENGTH (exp) | |
| 1119 == strlen (TREE_STRING_POINTER (exp)) + 1)) | |
| 1120 return darwin_sections[cstring_section]; | |
| 1121 | |
| 1122 return readonly_data_section; | |
| 1123 } | |
| 1124 | |
| 1125 #ifndef HAVE_GAS_LITERAL16 | |
| 1126 #define HAVE_GAS_LITERAL16 0 | |
| 1127 #endif | |
| 1128 | |
| 1129 static section * | |
| 1130 darwin_mergeable_constant_section (tree exp, | |
| 1131 unsigned HOST_WIDE_INT align) | |
| 1132 { | |
| 1133 enum machine_mode mode = DECL_MODE (exp); | |
| 1134 unsigned int modesize = GET_MODE_BITSIZE (mode); | |
| 1135 | |
| 1136 if (flag_merge_constants | |
| 1137 && mode != VOIDmode | |
| 1138 && mode != BLKmode | |
| 1139 && modesize <= align | |
| 1140 && align >= 8 | |
| 1141 && align <= 256 | |
| 1142 && (align & (align -1)) == 0) | |
| 1143 { | |
| 1144 tree size = TYPE_SIZE_UNIT (TREE_TYPE (exp)); | |
| 1145 | |
| 1146 if (TREE_CODE (size) == INTEGER_CST | |
| 1147 && TREE_INT_CST_LOW (size) == 4 | |
| 1148 && TREE_INT_CST_HIGH (size) == 0) | |
| 1149 return darwin_sections[literal4_section]; | |
| 1150 else if (TREE_CODE (size) == INTEGER_CST | |
| 1151 && TREE_INT_CST_LOW (size) == 8 | |
| 1152 && TREE_INT_CST_HIGH (size) == 0) | |
| 1153 return darwin_sections[literal8_section]; | |
| 1154 else if (HAVE_GAS_LITERAL16 | |
| 1155 && TARGET_64BIT | |
| 1156 && TREE_CODE (size) == INTEGER_CST | |
| 1157 && TREE_INT_CST_LOW (size) == 16 | |
| 1158 && TREE_INT_CST_HIGH (size) == 0) | |
| 1159 return darwin_sections[literal16_section]; | |
| 1160 else | |
| 1161 return readonly_data_section; | |
| 1162 } | |
| 1163 | |
| 1164 return readonly_data_section; | |
| 1165 } | |
| 1166 | |
| 1167 int | |
| 1168 machopic_reloc_rw_mask (void) | |
| 1169 { | |
| 1170 return MACHOPIC_INDIRECT ? 3 : 0; | |
| 1171 } | |
| 1172 | |
| 1173 section * | |
| 1174 machopic_select_section (tree decl, | |
| 1175 int reloc, | |
| 1176 unsigned HOST_WIDE_INT align) | |
| 1177 { | |
| 1178 bool weak = (DECL_P (decl) | |
| 1179 && DECL_WEAK (decl) | |
| 1180 && (lookup_attribute ("weak", DECL_ATTRIBUTES (decl)) | |
| 1181 || ! lookup_attribute ("weak_import", | |
| 1182 DECL_ATTRIBUTES (decl)))); | |
| 1183 section *base_section; | |
| 1184 | |
| 1185 switch (categorize_decl_for_section (decl, reloc)) | |
| 1186 { | |
| 1187 case SECCAT_TEXT: | |
| 1188 base_section = darwin_text_section (reloc, weak); | |
| 1189 break; | |
| 1190 | |
| 1191 case SECCAT_RODATA: | |
| 1192 case SECCAT_SRODATA: | |
| 1193 base_section = darwin_rodata_section (weak); | |
| 1194 break; | |
| 1195 | |
| 1196 case SECCAT_RODATA_MERGE_STR: | |
| 1197 base_section = darwin_mergeable_string_section (decl, align); | |
| 1198 break; | |
| 1199 | |
| 1200 case SECCAT_RODATA_MERGE_STR_INIT: | |
| 1201 base_section = darwin_mergeable_string_section (DECL_INITIAL (decl), align); | |
| 1202 break; | |
| 1203 | |
| 1204 case SECCAT_RODATA_MERGE_CONST: | |
| 1205 base_section = darwin_mergeable_constant_section (decl, align); | |
| 1206 break; | |
| 1207 | |
| 1208 case SECCAT_DATA: | |
| 1209 case SECCAT_DATA_REL: | |
| 1210 case SECCAT_DATA_REL_LOCAL: | |
| 1211 case SECCAT_DATA_REL_RO: | |
| 1212 case SECCAT_DATA_REL_RO_LOCAL: | |
| 1213 case SECCAT_SDATA: | |
| 1214 case SECCAT_TDATA: | |
| 1215 case SECCAT_BSS: | |
| 1216 case SECCAT_SBSS: | |
| 1217 case SECCAT_TBSS: | |
| 1218 if (TREE_READONLY (decl) || TREE_CONSTANT (decl)) | |
| 1219 base_section = weak ? darwin_sections[const_data_coal_section] | |
| 1220 : darwin_sections[const_data_section]; | |
| 1221 else | |
| 1222 base_section = weak ? darwin_sections[data_coal_section] : data_section; | |
| 1223 break; | |
| 1224 | |
| 1225 default: | |
| 1226 gcc_unreachable (); | |
| 1227 } | |
| 1228 | |
| 1229 /* Darwin weird special cases. */ | |
| 1230 if (TREE_CODE (decl) == CONSTRUCTOR | |
| 1231 && TREE_TYPE (decl) | |
| 1232 && TREE_CODE (TREE_TYPE (decl)) == RECORD_TYPE | |
| 1233 && TYPE_NAME (TREE_TYPE (decl))) | |
| 1234 { | |
| 1235 tree name = TYPE_NAME (TREE_TYPE (decl)); | |
| 1236 if (TREE_CODE (name) == TYPE_DECL) | |
| 1237 name = DECL_NAME (name); | |
| 1238 | |
| 1239 if (!strcmp (IDENTIFIER_POINTER (name), "__builtin_ObjCString")) | |
| 1240 { | |
| 1241 if (flag_next_runtime) | |
| 1242 return darwin_sections[objc_constant_string_object_section]; | |
| 1243 else | |
| 1244 return darwin_sections[objc_string_object_section]; | |
| 1245 } | |
| 1246 else | |
| 1247 return base_section; | |
| 1248 } | |
| 1249 else if (TREE_CODE (decl) == VAR_DECL | |
| 1250 && DECL_NAME (decl) | |
| 1251 && TREE_CODE (DECL_NAME (decl)) == IDENTIFIER_NODE | |
| 1252 && IDENTIFIER_POINTER (DECL_NAME (decl)) | |
| 1253 && !strncmp (IDENTIFIER_POINTER (DECL_NAME (decl)), "_OBJC_", 6)) | |
| 1254 { | |
| 1255 const char *name = IDENTIFIER_POINTER (DECL_NAME (decl)); | |
| 1256 | |
| 1257 if (!strncmp (name, "_OBJC_CLASS_METHODS_", 20)) | |
| 1258 return darwin_sections[objc_cls_meth_section]; | |
| 1259 else if (!strncmp (name, "_OBJC_INSTANCE_METHODS_", 23)) | |
| 1260 return darwin_sections[objc_inst_meth_section]; | |
| 1261 else if (!strncmp (name, "_OBJC_CATEGORY_CLASS_METHODS_", 20)) | |
| 1262 return darwin_sections[objc_cat_cls_meth_section]; | |
| 1263 else if (!strncmp (name, "_OBJC_CATEGORY_INSTANCE_METHODS_", 23)) | |
| 1264 return darwin_sections[objc_cat_inst_meth_section]; | |
| 1265 else if (!strncmp (name, "_OBJC_CLASS_VARIABLES_", 22)) | |
| 1266 return darwin_sections[objc_class_vars_section]; | |
| 1267 else if (!strncmp (name, "_OBJC_INSTANCE_VARIABLES_", 25)) | |
| 1268 return darwin_sections[objc_instance_vars_section]; | |
| 1269 else if (!strncmp (name, "_OBJC_CLASS_PROTOCOLS_", 22)) | |
| 1270 return darwin_sections[objc_cat_cls_meth_section]; | |
| 1271 else if (!strncmp (name, "_OBJC_CLASS_NAME_", 17)) | |
| 1272 return darwin_sections[objc_class_names_section]; | |
| 1273 else if (!strncmp (name, "_OBJC_METH_VAR_NAME_", 20)) | |
| 1274 return darwin_sections[objc_meth_var_names_section]; | |
| 1275 else if (!strncmp (name, "_OBJC_METH_VAR_TYPE_", 20)) | |
| 1276 return darwin_sections[objc_meth_var_types_section]; | |
| 1277 else if (!strncmp (name, "_OBJC_CLASS_REFERENCES", 22)) | |
| 1278 return darwin_sections[objc_cls_refs_section]; | |
| 1279 else if (!strncmp (name, "_OBJC_CLASS_", 12)) | |
| 1280 return darwin_sections[objc_class_section]; | |
| 1281 else if (!strncmp (name, "_OBJC_METACLASS_", 16)) | |
| 1282 return darwin_sections[objc_meta_class_section]; | |
| 1283 else if (!strncmp (name, "_OBJC_CATEGORY_", 15)) | |
| 1284 return darwin_sections[objc_category_section]; | |
| 1285 else if (!strncmp (name, "_OBJC_SELECTOR_REFERENCES", 25)) | |
| 1286 return darwin_sections[objc_selector_refs_section]; | |
| 1287 else if (!strncmp (name, "_OBJC_SELECTOR_FIXUP", 20)) | |
| 1288 return darwin_sections[objc_selector_fixup_section]; | |
| 1289 else if (!strncmp (name, "_OBJC_SYMBOLS", 13)) | |
| 1290 return darwin_sections[objc_symbols_section]; | |
| 1291 else if (!strncmp (name, "_OBJC_MODULES", 13)) | |
| 1292 return darwin_sections[objc_module_info_section]; | |
| 1293 else if (!strncmp (name, "_OBJC_IMAGE_INFO", 16)) | |
| 1294 return darwin_sections[objc_image_info_section]; | |
| 1295 else if (!strncmp (name, "_OBJC_PROTOCOL_INSTANCE_METHODS_", 32)) | |
| 1296 return darwin_sections[objc_cat_inst_meth_section]; | |
| 1297 else if (!strncmp (name, "_OBJC_PROTOCOL_CLASS_METHODS_", 29)) | |
| 1298 return darwin_sections[objc_cat_cls_meth_section]; | |
| 1299 else if (!strncmp (name, "_OBJC_PROTOCOL_REFS_", 20)) | |
| 1300 return darwin_sections[objc_cat_cls_meth_section]; | |
| 1301 else if (!strncmp (name, "_OBJC_PROTOCOL_", 15)) | |
| 1302 return darwin_sections[objc_protocol_section]; | |
| 1303 else | |
| 1304 return base_section; | |
| 1305 } | |
| 1306 | |
| 1307 return base_section; | |
| 1308 } | |
| 1309 | |
| 1310 /* This can be called with address expressions as "rtx". | |
| 1311 They must go in "const". */ | |
| 1312 | |
| 1313 section * | |
| 1314 machopic_select_rtx_section (enum machine_mode mode, rtx x, | |
| 1315 unsigned HOST_WIDE_INT align ATTRIBUTE_UNUSED) | |
| 1316 { | |
| 1317 if (GET_MODE_SIZE (mode) == 8 | |
| 1318 && (GET_CODE (x) == CONST_INT | |
| 1319 || GET_CODE (x) == CONST_DOUBLE)) | |
| 1320 return darwin_sections[literal8_section]; | |
| 1321 else if (GET_MODE_SIZE (mode) == 4 | |
| 1322 && (GET_CODE (x) == CONST_INT | |
| 1323 || GET_CODE (x) == CONST_DOUBLE)) | |
| 1324 return darwin_sections[literal4_section]; | |
| 1325 else if (HAVE_GAS_LITERAL16 | |
| 1326 && TARGET_64BIT | |
| 1327 && GET_MODE_SIZE (mode) == 16 | |
| 1328 && (GET_CODE (x) == CONST_INT | |
| 1329 || GET_CODE (x) == CONST_DOUBLE | |
| 1330 || GET_CODE (x) == CONST_VECTOR)) | |
| 1331 return darwin_sections[literal16_section]; | |
| 1332 else if (MACHOPIC_INDIRECT | |
| 1333 && (GET_CODE (x) == SYMBOL_REF | |
| 1334 || GET_CODE (x) == CONST | |
| 1335 || GET_CODE (x) == LABEL_REF)) | |
| 1336 return darwin_sections[const_data_section]; | |
| 1337 else | |
| 1338 return darwin_sections[const_section]; | |
| 1339 } | |
| 1340 | |
| 1341 void | |
| 1342 machopic_asm_out_constructor (rtx symbol, int priority ATTRIBUTE_UNUSED) | |
| 1343 { | |
| 1344 if (MACHOPIC_INDIRECT) | |
| 1345 switch_to_section (darwin_sections[mod_init_section]); | |
| 1346 else | |
| 1347 switch_to_section (darwin_sections[constructor_section]); | |
| 1348 assemble_align (POINTER_SIZE); | |
| 1349 assemble_integer (symbol, POINTER_SIZE / BITS_PER_UNIT, POINTER_SIZE, 1); | |
| 1350 | |
| 1351 if (! MACHOPIC_INDIRECT) | |
| 1352 fprintf (asm_out_file, ".reference .constructors_used\n"); | |
| 1353 } | |
| 1354 | |
| 1355 void | |
| 1356 machopic_asm_out_destructor (rtx symbol, int priority ATTRIBUTE_UNUSED) | |
| 1357 { | |
| 1358 if (MACHOPIC_INDIRECT) | |
| 1359 switch_to_section (darwin_sections[mod_term_section]); | |
| 1360 else | |
| 1361 switch_to_section (darwin_sections[destructor_section]); | |
| 1362 assemble_align (POINTER_SIZE); | |
| 1363 assemble_integer (symbol, POINTER_SIZE / BITS_PER_UNIT, POINTER_SIZE, 1); | |
| 1364 | |
| 1365 if (! MACHOPIC_INDIRECT) | |
| 1366 fprintf (asm_out_file, ".reference .destructors_used\n"); | |
| 1367 } | |
| 1368 | |
| 1369 void | |
| 1370 darwin_globalize_label (FILE *stream, const char *name) | |
| 1371 { | |
| 1372 if (!!strncmp (name, "_OBJC_", 6)) | |
| 1373 default_globalize_label (stream, name); | |
| 1374 } | |
| 1375 | |
|
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1376 /* This routine returns non-zero if 'name' starts with the special objective-c |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1377 anonymous file-scope static name. It accommodates c++'s mangling of such |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1378 symbols (in this case the symbols will have form _ZL{d}*_OBJC_* d=digit). */ |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1379 |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1380 int |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1381 darwin_label_is_anonymous_local_objc_name (const char *name) |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1382 { |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1383 const unsigned char *p = (const unsigned char *) name; |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1384 if (*p != '_') |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1385 return 0; |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1386 if (p[1] == 'Z' && p[2] == 'L') |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1387 { |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1388 p += 3; |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1389 while (*p >= '0' && *p <= '9') |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1390 p++; |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1391 } |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1392 return (!strncmp ((const char *)p, "_OBJC_", 6)); |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1393 } |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1394 |
| 0 | 1395 void |
| 1396 darwin_asm_named_section (const char *name, | |
| 1397 unsigned int flags ATTRIBUTE_UNUSED, | |
| 1398 tree decl ATTRIBUTE_UNUSED) | |
| 1399 { | |
| 1400 fprintf (asm_out_file, "\t.section %s\n", name); | |
| 1401 } | |
| 1402 | |
| 1403 void | |
| 1404 darwin_unique_section (tree decl ATTRIBUTE_UNUSED, int reloc ATTRIBUTE_UNUSED) | |
| 1405 { | |
| 1406 /* Darwin does not use unique sections. */ | |
| 1407 } | |
| 1408 | |
| 1409 /* Handle __attribute__ ((apple_kext_compatibility)). | |
| 1410 This only applies to darwin kexts for 2.95 compatibility -- it shrinks the | |
| 1411 vtable for classes with this attribute (and their descendants) by not | |
| 1412 outputting the new 3.0 nondeleting destructor. This means that such | |
| 1413 objects CANNOT be allocated on the stack or as globals UNLESS they have | |
| 1414 a completely empty `operator delete'. | |
| 1415 Luckily, this fits in with the Darwin kext model. | |
| 1416 | |
| 1417 This attribute also disables gcc3's potential overlaying of derived | |
| 1418 class data members on the padding at the end of the base class. */ | |
| 1419 | |
| 1420 tree | |
| 1421 darwin_handle_kext_attribute (tree *node, tree name, | |
| 1422 tree args ATTRIBUTE_UNUSED, | |
| 1423 int flags ATTRIBUTE_UNUSED, | |
| 1424 bool *no_add_attrs) | |
| 1425 { | |
| 1426 /* APPLE KEXT stuff -- only applies with pure static C++ code. */ | |
| 1427 if (! TARGET_KEXTABI) | |
| 1428 { | |
|
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1429 warning (0, "%qE 2.95 vtable-compatibility attribute applies " |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1430 "only when compiling a kext", name); |
| 0 | 1431 |
| 1432 *no_add_attrs = true; | |
| 1433 } | |
| 1434 else if (TREE_CODE (*node) != RECORD_TYPE) | |
| 1435 { | |
|
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1436 warning (0, "%qE 2.95 vtable-compatibility attribute applies " |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1437 "only to C++ classes", name); |
| 0 | 1438 |
| 1439 *no_add_attrs = true; | |
| 1440 } | |
| 1441 | |
| 1442 return NULL_TREE; | |
| 1443 } | |
| 1444 | |
| 1445 /* Handle a "weak_import" attribute; arguments as in | |
| 1446 struct attribute_spec.handler. */ | |
| 1447 | |
| 1448 tree | |
| 1449 darwin_handle_weak_import_attribute (tree *node, tree name, | |
| 1450 tree ARG_UNUSED (args), | |
| 1451 int ARG_UNUSED (flags), | |
| 1452 bool * no_add_attrs) | |
| 1453 { | |
| 1454 if (TREE_CODE (*node) != FUNCTION_DECL && TREE_CODE (*node) != VAR_DECL) | |
| 1455 { | |
|
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1456 warning (OPT_Wattributes, "%qE attribute ignored", |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1457 name); |
| 0 | 1458 *no_add_attrs = true; |
| 1459 } | |
| 1460 else | |
| 1461 declare_weak (*node); | |
| 1462 | |
| 1463 return NULL_TREE; | |
| 1464 } | |
| 1465 | |
| 1466 /* Emit a label for an FDE, making it global and/or weak if appropriate. | |
| 1467 The third parameter is nonzero if this is for exception handling. | |
| 1468 The fourth parameter is nonzero if this is just a placeholder for an | |
| 1469 FDE that we are omitting. */ | |
| 1470 | |
| 1471 void | |
| 1472 darwin_emit_unwind_label (FILE *file, tree decl, int for_eh, int empty) | |
| 1473 { | |
| 1474 char *lab; | |
| 1475 | |
| 1476 if (! for_eh) | |
| 1477 return; | |
| 1478 | |
| 1479 lab = concat (IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)), ".eh", NULL); | |
| 1480 | |
| 1481 if (TREE_PUBLIC (decl)) | |
| 1482 { | |
| 1483 targetm.asm_out.globalize_label (file, lab); | |
| 1484 if (DECL_VISIBILITY (decl) == VISIBILITY_HIDDEN) | |
| 1485 { | |
| 1486 fputs ("\t.private_extern ", file); | |
| 1487 assemble_name (file, lab); | |
| 1488 fputc ('\n', file); | |
| 1489 } | |
| 1490 } | |
| 1491 | |
| 1492 if (DECL_WEAK (decl)) | |
| 1493 { | |
| 1494 fputs ("\t.weak_definition ", file); | |
| 1495 assemble_name (file, lab); | |
| 1496 fputc ('\n', file); | |
| 1497 } | |
| 1498 | |
| 1499 assemble_name (file, lab); | |
| 1500 if (empty) | |
| 1501 { | |
| 1502 fputs (" = 0\n", file); | |
| 1503 | |
| 1504 /* Mark the absolute .eh and .eh1 style labels as needed to | |
| 1505 ensure that we don't dead code strip them and keep such | |
| 1506 labels from another instantiation point until we can fix this | |
| 1507 properly with group comdat support. */ | |
| 1508 darwin_mark_decl_preserved (lab); | |
| 1509 } | |
| 1510 else | |
| 1511 fputs (":\n", file); | |
| 1512 | |
| 1513 free (lab); | |
| 1514 } | |
| 1515 | |
| 1516 static GTY(()) unsigned long except_table_label_num; | |
| 1517 | |
| 1518 void | |
| 1519 darwin_emit_except_table_label (FILE *file) | |
| 1520 { | |
| 1521 char section_start_label[30]; | |
| 1522 | |
| 1523 ASM_GENERATE_INTERNAL_LABEL (section_start_label, "GCC_except_table", | |
| 1524 except_table_label_num++); | |
| 1525 ASM_OUTPUT_LABEL (file, section_start_label); | |
| 1526 } | |
| 1527 /* Generate a PC-relative reference to a Mach-O non-lazy-symbol. */ | |
| 1528 | |
| 1529 void | |
| 1530 darwin_non_lazy_pcrel (FILE *file, rtx addr) | |
| 1531 { | |
| 1532 const char *nlp_name; | |
| 1533 | |
| 1534 gcc_assert (GET_CODE (addr) == SYMBOL_REF); | |
| 1535 | |
| 1536 nlp_name = machopic_indirection_name (addr, /*stub_p=*/false); | |
| 1537 fputs ("\t.long\t", file); | |
| 1538 ASM_OUTPUT_LABELREF (file, nlp_name); | |
| 1539 fputs ("-.", file); | |
| 1540 } | |
| 1541 | |
| 1542 /* Emit an assembler directive to set visibility for a symbol. The | |
| 1543 only supported visibilities are VISIBILITY_DEFAULT and | |
| 1544 VISIBILITY_HIDDEN; the latter corresponds to Darwin's "private | |
| 1545 extern". There is no MACH-O equivalent of ELF's | |
| 1546 VISIBILITY_INTERNAL or VISIBILITY_PROTECTED. */ | |
| 1547 | |
| 1548 void | |
| 1549 darwin_assemble_visibility (tree decl, int vis) | |
| 1550 { | |
| 1551 if (vis == VISIBILITY_DEFAULT) | |
| 1552 ; | |
| 1553 else if (vis == VISIBILITY_HIDDEN) | |
| 1554 { | |
| 1555 fputs ("\t.private_extern ", asm_out_file); | |
| 1556 assemble_name (asm_out_file, | |
| 1557 (IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)))); | |
| 1558 fputs ("\n", asm_out_file); | |
| 1559 } | |
| 1560 else | |
| 1561 warning (OPT_Wattributes, "internal and protected visibility attributes " | |
| 1562 "not supported in this configuration; ignored"); | |
| 1563 } | |
| 1564 | |
| 1565 /* Output a difference of two labels that will be an assembly time | |
| 1566 constant if the two labels are local. (.long lab1-lab2 will be | |
| 1567 very different if lab1 is at the boundary between two sections; it | |
| 1568 will be relocated according to the second section, not the first, | |
| 1569 so one ends up with a difference between labels in different | |
| 1570 sections, which is bad in the dwarf2 eh context for instance.) */ | |
| 1571 | |
| 1572 static int darwin_dwarf_label_counter; | |
| 1573 | |
| 1574 void | |
| 1575 darwin_asm_output_dwarf_delta (FILE *file, int size, | |
| 1576 const char *lab1, const char *lab2) | |
| 1577 { | |
| 1578 int islocaldiff = (lab1[0] == '*' && lab1[1] == 'L' | |
| 1579 && lab2[0] == '*' && lab2[1] == 'L'); | |
| 1580 const char *directive = (size == 8 ? ".quad" : ".long"); | |
| 1581 | |
| 1582 if (islocaldiff) | |
| 1583 fprintf (file, "\t.set L$set$%d,", darwin_dwarf_label_counter); | |
| 1584 else | |
| 1585 fprintf (file, "\t%s\t", directive); | |
| 1586 assemble_name_raw (file, lab1); | |
| 1587 fprintf (file, "-"); | |
| 1588 assemble_name_raw (file, lab2); | |
| 1589 if (islocaldiff) | |
| 1590 fprintf (file, "\n\t%s L$set$%d", directive, darwin_dwarf_label_counter++); | |
| 1591 } | |
| 1592 | |
| 1593 /* Output labels for the start of the DWARF sections if necessary. */ | |
| 1594 void | |
| 1595 darwin_file_start (void) | |
| 1596 { | |
| 1597 if (write_symbols == DWARF2_DEBUG) | |
| 1598 { | |
| 1599 static const char * const debugnames[] = | |
| 1600 { | |
| 1601 DEBUG_FRAME_SECTION, | |
| 1602 DEBUG_INFO_SECTION, | |
| 1603 DEBUG_ABBREV_SECTION, | |
| 1604 DEBUG_ARANGES_SECTION, | |
| 1605 DEBUG_MACINFO_SECTION, | |
| 1606 DEBUG_LINE_SECTION, | |
| 1607 DEBUG_LOC_SECTION, | |
| 1608 DEBUG_PUBNAMES_SECTION, | |
| 1609 DEBUG_PUBTYPES_SECTION, | |
| 1610 DEBUG_STR_SECTION, | |
| 1611 DEBUG_RANGES_SECTION | |
| 1612 }; | |
| 1613 size_t i; | |
| 1614 | |
| 1615 for (i = 0; i < ARRAY_SIZE (debugnames); i++) | |
| 1616 { | |
| 1617 int namelen; | |
| 1618 | |
| 1619 switch_to_section (get_section (debugnames[i], SECTION_DEBUG, NULL)); | |
| 1620 | |
| 1621 gcc_assert (strncmp (debugnames[i], "__DWARF,", 8) == 0); | |
| 1622 gcc_assert (strchr (debugnames[i] + 8, ',')); | |
| 1623 | |
| 1624 namelen = strchr (debugnames[i] + 8, ',') - (debugnames[i] + 8); | |
| 1625 fprintf (asm_out_file, "Lsection%.*s:\n", namelen, debugnames[i] + 8); | |
| 1626 } | |
| 1627 } | |
| 1628 } | |
| 1629 | |
| 1630 /* Output an offset in a DWARF section on Darwin. On Darwin, DWARF section | |
| 1631 offsets are not represented using relocs in .o files; either the | |
| 1632 section never leaves the .o file, or the linker or other tool is | |
| 1633 responsible for parsing the DWARF and updating the offsets. */ | |
| 1634 | |
| 1635 void | |
| 1636 darwin_asm_output_dwarf_offset (FILE *file, int size, const char * lab, | |
| 1637 section *base) | |
| 1638 { | |
| 1639 char sname[64]; | |
| 1640 int namelen; | |
| 1641 | |
| 1642 gcc_assert (base->common.flags & SECTION_NAMED); | |
| 1643 gcc_assert (strncmp (base->named.name, "__DWARF,", 8) == 0); | |
| 1644 gcc_assert (strchr (base->named.name + 8, ',')); | |
| 1645 | |
| 1646 namelen = strchr (base->named.name + 8, ',') - (base->named.name + 8); | |
| 1647 sprintf (sname, "*Lsection%.*s", namelen, base->named.name + 8); | |
| 1648 darwin_asm_output_dwarf_delta (file, size, lab, sname); | |
| 1649 } | |
| 1650 | |
| 1651 void | |
| 1652 darwin_file_end (void) | |
| 1653 { | |
| 1654 machopic_finish (asm_out_file); | |
| 1655 if (strcmp (lang_hooks.name, "GNU C++") == 0) | |
| 1656 { | |
| 1657 switch_to_section (darwin_sections[constructor_section]); | |
| 1658 switch_to_section (darwin_sections[destructor_section]); | |
| 1659 ASM_OUTPUT_ALIGN (asm_out_file, 1); | |
| 1660 } | |
| 1661 fprintf (asm_out_file, "\t.subsections_via_symbols\n"); | |
| 1662 } | |
| 1663 | |
| 1664 /* TODO: Add a language hook for identifying if a decl is a vtable. */ | |
| 1665 #define DARWIN_VTABLE_P(DECL) 0 | |
| 1666 | |
| 1667 /* Cross-module name binding. Darwin does not support overriding | |
| 1668 functions at dynamic-link time, except for vtables in kexts. */ | |
| 1669 | |
| 1670 bool | |
| 1671 darwin_binds_local_p (const_tree decl) | |
| 1672 { | |
| 1673 return default_binds_local_p_1 (decl, | |
| 1674 TARGET_KEXTABI && DARWIN_VTABLE_P (decl)); | |
| 1675 } | |
| 1676 | |
| 1677 #if 0 | |
| 1678 /* See TARGET_ASM_OUTPUT_ANCHOR for why we can't do this yet. */ | |
| 1679 /* The Darwin's implementation of TARGET_ASM_OUTPUT_ANCHOR. Define the | |
| 1680 anchor relative to ".", the current section position. We cannot use | |
| 1681 the default one because ASM_OUTPUT_DEF is wrong for Darwin. */ | |
| 1682 | |
| 1683 void | |
| 1684 darwin_asm_output_anchor (rtx symbol) | |
| 1685 { | |
| 1686 fprintf (asm_out_file, "\t.set\t"); | |
| 1687 assemble_name (asm_out_file, XSTR (symbol, 0)); | |
| 1688 fprintf (asm_out_file, ", . + " HOST_WIDE_INT_PRINT_DEC "\n", | |
| 1689 SYMBOL_REF_BLOCK_OFFSET (symbol)); | |
| 1690 } | |
| 1691 #endif | |
| 1692 | |
| 1693 /* Set the darwin specific attributes on TYPE. */ | |
| 1694 void | |
| 1695 darwin_set_default_type_attributes (tree type) | |
| 1696 { | |
| 1697 if (darwin_ms_struct | |
| 1698 && TREE_CODE (type) == RECORD_TYPE) | |
| 1699 TYPE_ATTRIBUTES (type) = tree_cons (get_identifier ("ms_struct"), | |
| 1700 NULL_TREE, | |
| 1701 TYPE_ATTRIBUTES (type)); | |
| 1702 } | |
| 1703 | |
| 1704 /* True, iff we're generating code for loadable kernel extensions. */ | |
| 1705 | |
| 1706 bool | |
| 1707 darwin_kextabi_p (void) { | |
| 1708 return flag_apple_kext; | |
| 1709 } | |
| 1710 | |
| 1711 void | |
| 1712 darwin_override_options (void) | |
| 1713 { | |
|
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1714 /* Don't emit DWARF3/4 unless specifically selected. This is a |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1715 workaround for tool bugs. */ |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1716 if (dwarf_strict < 0) |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1717 dwarf_strict = 1; |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1718 |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1719 /* Disable -freorder-blocks-and-partition for darwin_emit_unwind_label. */ |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1720 if (flag_reorder_blocks_and_partition |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1721 && (targetm.asm_out.unwind_label == darwin_emit_unwind_label)) |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1722 { |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1723 inform (input_location, |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1724 "-freorder-blocks-and-partition does not work with exceptions " |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1725 "on this architecture"); |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1726 flag_reorder_blocks_and_partition = 0; |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1727 flag_reorder_blocks = 1; |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1728 } |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1729 |
| 0 | 1730 if (flag_mkernel || flag_apple_kext) |
| 1731 { | |
| 1732 /* -mkernel implies -fapple-kext for C++ */ | |
| 1733 if (strcmp (lang_hooks.name, "GNU C++") == 0) | |
| 1734 flag_apple_kext = 1; | |
| 1735 | |
| 1736 flag_no_common = 1; | |
| 1737 | |
| 1738 /* No EH in kexts. */ | |
| 1739 flag_exceptions = 0; | |
| 1740 /* No -fnon-call-exceptions data in kexts. */ | |
| 1741 flag_non_call_exceptions = 0; | |
| 1742 } | |
| 1743 if (flag_var_tracking | |
| 1744 && strverscmp (darwin_macosx_version_min, "10.5") >= 0 | |
| 1745 && debug_info_level >= DINFO_LEVEL_NORMAL | |
| 1746 && debug_hooks->var_location != do_nothing_debug_hooks.var_location) | |
| 1747 flag_var_tracking_uninit = 1; | |
| 1748 } | |
| 1749 | |
| 1750 /* Add $LDBL128 suffix to long double builtins. */ | |
| 1751 | |
| 1752 static void | |
| 1753 darwin_patch_builtin (int fncode) | |
| 1754 { | |
| 1755 tree fn = built_in_decls[fncode]; | |
| 1756 tree sym; | |
| 1757 char *newname; | |
| 1758 | |
| 1759 if (!fn) | |
| 1760 return; | |
| 1761 | |
| 1762 sym = DECL_ASSEMBLER_NAME (fn); | |
| 1763 newname = ACONCAT (("_", IDENTIFIER_POINTER (sym), "$LDBL128", NULL)); | |
| 1764 | |
| 1765 set_user_assembler_name (fn, newname); | |
| 1766 | |
| 1767 fn = implicit_built_in_decls[fncode]; | |
| 1768 if (fn) | |
| 1769 set_user_assembler_name (fn, newname); | |
| 1770 } | |
| 1771 | |
| 1772 void | |
| 1773 darwin_patch_builtins (void) | |
| 1774 { | |
| 1775 if (LONG_DOUBLE_TYPE_SIZE != 128) | |
| 1776 return; | |
| 1777 | |
| 1778 #define PATCH_BUILTIN(fncode) darwin_patch_builtin (fncode); | |
| 1779 #define PATCH_BUILTIN_NO64(fncode) \ | |
| 1780 if (!TARGET_64BIT) \ | |
| 1781 darwin_patch_builtin (fncode); | |
| 1782 #define PATCH_BUILTIN_VARIADIC(fncode) \ | |
| 1783 if (!TARGET_64BIT \ | |
| 1784 && (strverscmp (darwin_macosx_version_min, "10.3.9") >= 0)) \ | |
| 1785 darwin_patch_builtin (fncode); | |
| 1786 #include "darwin-ppc-ldouble-patch.def" | |
| 1787 #undef PATCH_BUILTIN | |
| 1788 #undef PATCH_BUILTIN_NO64 | |
| 1789 #undef PATCH_BUILTIN_VARIADIC | |
| 1790 } | |
| 1791 | |
| 1792 | |
| 1793 #include "gt-darwin.h" |