1 /* Darwin support needed only by C/C++ frontends. 2 Copyright (C) 2001-2015 Free Software Foundation, Inc. 3 Contributed by Apple Computer Inc. 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" 24 #include "tm.h" 25 #include "cpplib.h" 26 #include "hash-set.h" 27 #include "machmode.h" 28 #include "vec.h" 29 #include "double-int.h" 30 #include "input.h" 31 #include "alias.h" 32 #include "symtab.h" 33 #include "wide-int.h" 34 #include "inchash.h" 35 #include "tree.h" 36 #include "target.h" 37 #include "incpath.h" 38 #include "c-family/c-common.h" 39 #include "c-family/c-pragma.h" 40 #include "c-family/c-format.h" 41 #include "diagnostic-core.h" 42 #include "flags.h" 43 #include "tm_p.h" 44 #include "cppdefault.h" 45 #include "prefix.h" 46 #include "c-family/c-target.h" 47 #include "c-family/c-target-def.h" 48 #include "predict.h" 49 #include "dominance.h" 50 #include "cfg.h" 51 #include "cfgrtl.h" 52 #include "cfganal.h" 53 #include "lcm.h" 54 #include "cfgbuild.h" 55 #include "cfgcleanup.h" 56 #include "basic-block.h" 57 #include "hash-map.h" 58 #include "is-a.h" 59 #include "plugin-api.h" 60 #include "vec.h" 61 #include "hashtab.h" 62 #include "hash-set.h" 63 #include "machmode.h" 64 #include "hard-reg-set.h" 65 #include "input.h" 66 #include "function.h" 67 #include "ipa-ref.h" 68 #include "cgraph.h" 69 #include "../../libcpp/internal.h" 70 71 /* Pragmas. */ 72 73 #define BAD(gmsgid) do { warning (OPT_Wpragmas, gmsgid); return; } while (0) 74 #define BAD2(msgid, arg) do { warning (OPT_Wpragmas, msgid, arg); return; } while (0) 75 76 static bool using_frameworks = false; 77 78 static const char *find_subframework_header (cpp_reader *pfile, const char *header, 79 cpp_dir **dirp); 80 81 typedef struct align_stack 82 { 83 int alignment; 84 struct align_stack * prev; 85 } align_stack; 86 87 static struct align_stack * field_align_stack = NULL; 88 89 /* Maintain a small stack of alignments. This is similar to pragma 90 pack's stack, but simpler. */ 91 92 static void 93 push_field_alignment (int bit_alignment) 94 { 95 align_stack *entry = XNEW (align_stack); 96 97 entry->alignment = maximum_field_alignment; 98 entry->prev = field_align_stack; 99 field_align_stack = entry; 100 101 maximum_field_alignment = bit_alignment; 102 } 103 104 static void 105 pop_field_alignment (void) 106 { 107 if (field_align_stack) 108 { 109 align_stack *entry = field_align_stack; 110 111 maximum_field_alignment = entry->alignment; 112 field_align_stack = entry->prev; 113 free (entry); 114 } 115 else 116 error ("too many #pragma options align=reset"); 117 } 118 119 /* Handlers for Darwin-specific pragmas. */ 120 121 void 122 darwin_pragma_ignore (cpp_reader *pfile ATTRIBUTE_UNUSED) 123 { 124 /* Do nothing. */ 125 } 126 127 /* #pragma options align={mac68k|power|reset} */ 128 129 void 130 darwin_pragma_options (cpp_reader *pfile ATTRIBUTE_UNUSED) 131 { 132 const char *arg; 133 tree t, x; 134 135 if (pragma_lex (&t) != CPP_NAME) 136 BAD ("malformed '#pragma options', ignoring"); 137 arg = IDENTIFIER_POINTER (t); 138 if (strcmp (arg, "align")) 139 BAD ("malformed '#pragma options', ignoring"); 140 if (pragma_lex (&t) != CPP_EQ) 141 BAD ("malformed '#pragma options', ignoring"); 142 if (pragma_lex (&t) != CPP_NAME) 143 BAD ("malformed '#pragma options', ignoring"); 144 145 if (pragma_lex (&x) != CPP_EOF) 146 warning (OPT_Wpragmas, "junk at end of '#pragma options'"); 147 148 arg = IDENTIFIER_POINTER (t); 149 if (!strcmp (arg, "mac68k")) 150 push_field_alignment (16); 151 else if (!strcmp (arg, "power")) 152 push_field_alignment (0); 153 else if (!strcmp (arg, "reset")) 154 pop_field_alignment (); 155 else 156 BAD ("malformed '#pragma options align={mac68k|power|reset}', ignoring"); 157 } 158 159 /* #pragma unused ([var {, var}*]) */ 160 161 void 162 darwin_pragma_unused (cpp_reader *pfile ATTRIBUTE_UNUSED) 163 { 164 tree decl, x; 165 int tok; 166 167 if (pragma_lex (&x) != CPP_OPEN_PAREN) 168 BAD ("missing '(' after '#pragma unused', ignoring"); 169 170 while (1) 171 { 172 tok = pragma_lex (&decl); 173 if (tok == CPP_NAME && decl) 174 { 175 tree local = lookup_name (decl); 176 if (local && (TREE_CODE (local) == PARM_DECL 177 || TREE_CODE (local) == VAR_DECL)) 178 { 179 TREE_USED (local) = 1; 180 DECL_READ_P (local) = 1; 181 } 182 tok = pragma_lex (&x); 183 if (tok != CPP_COMMA) 184 break; 185 } 186 } 187 188 if (tok != CPP_CLOSE_PAREN) 189 BAD ("missing ')' after '#pragma unused', ignoring"); 190 191 if (pragma_lex (&x) != CPP_EOF) 192 BAD ("junk at end of '#pragma unused'"); 193 } 194 195 /* Parse the ms_struct pragma. */ 196 void 197 darwin_pragma_ms_struct (cpp_reader *pfile ATTRIBUTE_UNUSED) 198 { 199 const char *arg; 200 tree t; 201 202 if (pragma_lex (&t) != CPP_NAME) 203 BAD ("malformed '#pragma ms_struct', ignoring"); 204 arg = IDENTIFIER_POINTER (t); 205 206 if (!strcmp (arg, "on")) 207 darwin_ms_struct = true; 208 else if (!strcmp (arg, "off") || !strcmp (arg, "reset")) 209 darwin_ms_struct = false; 210 else 211 BAD ("malformed '#pragma ms_struct {on|off|reset}', ignoring"); 212 213 if (pragma_lex (&t) != CPP_EOF) 214 BAD ("junk at end of '#pragma ms_struct'"); 215 } 216 217 static struct frameworks_in_use { 218 size_t len; 219 const char *name; 220 cpp_dir* dir; 221 } *frameworks_in_use; 222 static int num_frameworks = 0; 223 static int max_frameworks = 0; 224 225 226 /* Remember which frameworks have been seen, so that we can ensure 227 that all uses of that framework come from the same framework. DIR 228 is the place where the named framework NAME, which is of length 229 LEN, was found. We copy the directory name from NAME, as it will be 230 freed by others. */ 231 232 static void 233 add_framework (const char *name, size_t len, cpp_dir *dir) 234 { 235 char *dir_name; 236 int i; 237 for (i = 0; i < num_frameworks; ++i) 238 { 239 if (len == frameworks_in_use[i].len 240 && strncmp (name, frameworks_in_use[i].name, len) == 0) 241 { 242 return; 243 } 244 } 245 if (i >= max_frameworks) 246 { 247 max_frameworks = i*2; 248 max_frameworks += i == 0; 249 frameworks_in_use = XRESIZEVEC (struct frameworks_in_use, 250 frameworks_in_use, max_frameworks); 251 } 252 dir_name = XNEWVEC (char, len + 1); 253 memcpy (dir_name, name, len); 254 dir_name[len] = '\0'; 255 frameworks_in_use[num_frameworks].name = dir_name; 256 frameworks_in_use[num_frameworks].len = len; 257 frameworks_in_use[num_frameworks].dir = dir; 258 ++num_frameworks; 259 } 260 261 /* Recall if we have seen the named framework NAME, before, and where 262 we saw it. NAME is LEN bytes long. The return value is the place 263 where it was seen before. */ 264 265 static struct cpp_dir* 266 find_framework (const char *name, size_t len) 267 { 268 int i; 269 for (i = 0; i < num_frameworks; ++i) 270 { 271 if (len == frameworks_in_use[i].len 272 && strncmp (name, frameworks_in_use[i].name, len) == 0) 273 { 274 return frameworks_in_use[i].dir; 275 } 276 } 277 return 0; 278 } 279 280 /* There are two directories in a framework that contain header files, 281 Headers and PrivateHeaders. We search Headers first as it is more 282 common to upgrade a header from PrivateHeaders to Headers and when 283 that is done, the old one might hang around and be out of data, 284 causing grief. */ 285 286 struct framework_header {const char * dirName; int dirNameLen; }; 287 static struct framework_header framework_header_dirs[] = { 288 { "Headers", 7 }, 289 { "PrivateHeaders", 14 }, 290 { NULL, 0 } 291 }; 292 293 /* Returns a pointer to a malloced string that contains the real pathname 294 to the file, given the base name and the name. */ 295 296 static char * 297 framework_construct_pathname (const char *fname, cpp_dir *dir) 298 { 299 const char *buf; 300 size_t fname_len, frname_len; 301 cpp_dir *fast_dir; 302 char *frname; 303 struct stat st; 304 int i; 305 306 /* Framework names must have a / in them. */ 307 buf = strchr (fname, '/'); 308 if (buf) 309 fname_len = buf - fname; 310 else 311 return 0; 312 313 fast_dir = find_framework (fname, fname_len); 314 315 /* Framework includes must all come from one framework. */ 316 if (fast_dir && dir != fast_dir) 317 return 0; 318 319 frname = XNEWVEC (char, strlen (fname) + dir->len + 2 320 + strlen(".framework/") + strlen("PrivateHeaders")); 321 strncpy (&frname[0], dir->name, dir->len); 322 frname_len = dir->len; 323 if (frname_len && frname[frname_len-1] != '/') 324 frname[frname_len++] = '/'; 325 strncpy (&frname[frname_len], fname, fname_len); 326 frname_len += fname_len; 327 strncpy (&frname[frname_len], ".framework/", strlen (".framework/")); 328 frname_len += strlen (".framework/"); 329 330 if (fast_dir == 0) 331 { 332 frname[frname_len-1] = 0; 333 if (stat (frname, &st) == 0) 334 { 335 /* As soon as we find the first instance of the framework, 336 we stop and never use any later instance of that 337 framework. */ 338 add_framework (fname, fname_len, dir); 339 } 340 else 341 { 342 /* If we can't find the parent directory, no point looking 343 further. */ 344 free (frname); 345 return 0; 346 } 347 frname[frname_len-1] = '/'; 348 } 349 350 /* Append framework_header_dirs and header file name */ 351 for (i = 0; framework_header_dirs[i].dirName; i++) 352 { 353 strncpy (&frname[frname_len], 354 framework_header_dirs[i].dirName, 355 framework_header_dirs[i].dirNameLen); 356 strcpy (&frname[frname_len + framework_header_dirs[i].dirNameLen], 357 &fname[fname_len]); 358 359 if (stat (frname, &st) == 0) 360 return frname; 361 } 362 363 free (frname); 364 return 0; 365 } 366 367 /* Search for FNAME in sub-frameworks. pname is the context that we 368 wish to search in. Return the path the file was found at, 369 otherwise return 0. */ 370 371 static const char* 372 find_subframework_file (const char *fname, const char *pname) 373 { 374 char *sfrname; 375 const char *dot_framework = ".framework/"; 376 const char *bufptr; 377 int sfrname_len, i, fname_len; 378 struct cpp_dir *fast_dir; 379 static struct cpp_dir subframe_dir; 380 struct stat st; 381 382 bufptr = strchr (fname, '/'); 383 384 /* Subframework files must have / in the name. */ 385 if (bufptr == 0) 386 return 0; 387 388 fname_len = bufptr - fname; 389 fast_dir = find_framework (fname, fname_len); 390 391 /* Sub framework header filename includes parent framework name and 392 header name in the "CarbonCore/OSUtils.h" form. If it does not 393 include slash it is not a sub framework include. */ 394 bufptr = strstr (pname, dot_framework); 395 396 /* If the parent header is not of any framework, then this header 397 cannot be part of any subframework. */ 398 if (!bufptr) 399 return 0; 400 401 /* Now translate. For example, +- bufptr 402 fname = CarbonCore/OSUtils.h | 403 pname = /System/Library/Frameworks/Foundation.framework/Headers/Foundation.h 404 into 405 sfrname = /System/Library/Frameworks/Foundation.framework/Frameworks/CarbonCore.framework/Headers/OSUtils.h */ 406 407 sfrname = XNEWVEC (char, strlen (pname) + strlen (fname) + 2 + 408 strlen ("Frameworks/") + strlen (".framework/") 409 + strlen ("PrivateHeaders")); 410 411 bufptr += strlen (dot_framework); 412 413 sfrname_len = bufptr - pname; 414 415 strncpy (&sfrname[0], pname, sfrname_len); 416 417 strncpy (&sfrname[sfrname_len], "Frameworks/", strlen ("Frameworks/")); 418 sfrname_len += strlen("Frameworks/"); 419 420 strncpy (&sfrname[sfrname_len], fname, fname_len); 421 sfrname_len += fname_len; 422 423 strncpy (&sfrname[sfrname_len], ".framework/", strlen (".framework/")); 424 sfrname_len += strlen (".framework/"); 425 426 /* Append framework_header_dirs and header file name */ 427 for (i = 0; framework_header_dirs[i].dirName; i++) 428 { 429 strncpy (&sfrname[sfrname_len], 430 framework_header_dirs[i].dirName, 431 framework_header_dirs[i].dirNameLen); 432 strcpy (&sfrname[sfrname_len + framework_header_dirs[i].dirNameLen], 433 &fname[fname_len]); 434 435 if (stat (sfrname, &st) == 0) 436 { 437 if (fast_dir != &subframe_dir) 438 { 439 if (fast_dir) 440 warning (0, "subframework include %s conflicts with framework include", 441 fname); 442 else 443 add_framework (fname, fname_len, &subframe_dir); 444 } 445 446 return sfrname; 447 } 448 } 449 free (sfrname); 450 451 return 0; 452 } 453 454 /* Add PATH to the system includes. PATH must be malloc-ed and 455 NUL-terminated. System framework paths are C++ aware. */ 456 457 static void 458 add_system_framework_path (char *path) 459 { 460 int cxx_aware = 1; 461 cpp_dir *p; 462 463 p = XNEW (cpp_dir); 464 p->next = NULL; 465 p->name = path; 466 p->sysp = 1 + !cxx_aware; 467 p->construct = framework_construct_pathname; 468 using_frameworks = 1; 469 470 add_cpp_dir_path (p, SYSTEM); 471 } 472 473 /* Add PATH to the bracket includes. PATH must be malloc-ed and 474 NUL-terminated. */ 475 476 void 477 add_framework_path (char *path) 478 { 479 cpp_dir *p; 480 481 p = XNEW (cpp_dir); 482 p->next = NULL; 483 p->name = path; 484 p->sysp = 0; 485 p->construct = framework_construct_pathname; 486 using_frameworks = 1; 487 488 add_cpp_dir_path (p, BRACKET); 489 } 490 491 static const char *framework_defaults [] = 492 { 493 "/System/Library/Frameworks", 494 "/Library/Frameworks", 495 }; 496 497 /* Register the GNU objective-C runtime include path if STDINC. */ 498 499 void 500 darwin_register_objc_includes (const char *sysroot, const char *iprefix, 501 int stdinc) 502 { 503 const char *fname; 504 size_t len; 505 /* We do not do anything if we do not want the standard includes. */ 506 if (!stdinc) 507 return; 508 509 fname = GCC_INCLUDE_DIR "-gnu-runtime"; 510 511 /* Register the GNU OBJC runtime include path if we are compiling OBJC 512 with GNU-runtime. */ 513 514 if (c_dialect_objc () && !flag_next_runtime) 515 { 516 char *str; 517 /* See if our directory starts with the standard prefix. 518 "Translate" them, i.e. replace /usr/local/lib/gcc... with 519 IPREFIX and search them first. */ 520 if (iprefix && (len = cpp_GCC_INCLUDE_DIR_len) != 0 && !sysroot 521 && !strncmp (fname, cpp_GCC_INCLUDE_DIR, len)) 522 { 523 str = concat (iprefix, fname + len, NULL); 524 /* FIXME: wrap the headers for C++awareness. */ 525 add_path (str, SYSTEM, /*c++aware=*/false, false); 526 } 527 528 /* Should this directory start with the sysroot? */ 529 if (sysroot) 530 str = concat (sysroot, fname, NULL); 531 else 532 str = update_path (fname, ""); 533 534 add_path (str, SYSTEM, /*c++aware=*/false, false); 535 } 536 } 537 538 539 /* Register all the system framework paths if STDINC is true and setup 540 the missing_header callback for subframework searching if any 541 frameworks had been registered. */ 542 543 void 544 darwin_register_frameworks (const char *sysroot, 545 const char *iprefix ATTRIBUTE_UNUSED, int stdinc) 546 { 547 if (stdinc) 548 { 549 size_t i; 550 551 /* Setup default search path for frameworks. */ 552 for (i=0; i<sizeof (framework_defaults)/sizeof(const char *); ++i) 553 { 554 char *str; 555 if (sysroot) 556 str = concat (sysroot, xstrdup (framework_defaults [i]), NULL); 557 else 558 str = xstrdup (framework_defaults[i]); 559 /* System Framework headers are cxx aware. */ 560 add_system_framework_path (str); 561 } 562 } 563 564 if (using_frameworks) 565 cpp_get_callbacks (parse_in)->missing_header = find_subframework_header; 566 } 567 568 /* Search for HEADER in context dependent way. The return value is 569 the malloced name of a header to try and open, if any, or NULL 570 otherwise. This is called after normal header lookup processing 571 fails to find a header. We search each file in the include stack, 572 using FUNC, starting from the most deeply nested include and 573 finishing with the main input file. We stop searching when FUNC 574 returns nonzero. */ 575 576 static const char* 577 find_subframework_header (cpp_reader *pfile, const char *header, cpp_dir **dirp) 578 { 579 const char *fname = header; 580 struct cpp_buffer *b; 581 const char *n; 582 583 for (b = cpp_get_buffer (pfile); 584 b && cpp_get_file (b) && cpp_get_path (cpp_get_file (b)); 585 b = cpp_get_prev (b)) 586 { 587 n = find_subframework_file (fname, cpp_get_path (cpp_get_file (b))); 588 if (n) 589 { 590 /* Logically, the place where we found the subframework is 591 the place where we found the Framework that contains the 592 subframework. This is useful for tracking wether or not 593 we are in a system header. */ 594 *dirp = cpp_get_dir (cpp_get_file (b)); 595 return n; 596 } 597 } 598 599 return 0; 600 } 601 602 /* Return the value of darwin_macosx_version_min suitable for the 603 __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ macro, so '10.4.2' 604 becomes 1040 and '10.10.0' becomes 101000. The lowest digit is 605 always zero, as is the second lowest for '10.10.x' and above. 606 Print a warning if the version number can't be understood. */ 607 static const char * 608 version_as_macro (void) 609 { 610 static char result[7] = "1000"; 611 int minorDigitIdx; 612 613 if (strncmp (darwin_macosx_version_min, "10.", 3) != 0) 614 goto fail; 615 if (! ISDIGIT (darwin_macosx_version_min[3])) 616 goto fail; 617 618 minorDigitIdx = 3; 619 result[2] = darwin_macosx_version_min[minorDigitIdx++]; 620 if (ISDIGIT (darwin_macosx_version_min[minorDigitIdx])) 621 { 622 /* Starting with OS X 10.10, the macro ends '00' rather than '0', 623 i.e. 10.10.x becomes 101000 rather than 10100. */ 624 result[3] = darwin_macosx_version_min[minorDigitIdx++]; 625 result[4] = '0'; 626 result[5] = '0'; 627 result[6] = '\0'; 628 } 629 if (darwin_macosx_version_min[minorDigitIdx] != '\0' 630 && darwin_macosx_version_min[minorDigitIdx] != '.') 631 goto fail; 632 633 return result; 634 635 fail: 636 error ("unknown value %qs of -mmacosx-version-min", 637 darwin_macosx_version_min); 638 return "1000"; 639 } 640 641 /* Define additional CPP flags for Darwin. */ 642 643 #define builtin_define(TXT) cpp_define (pfile, TXT) 644 645 void 646 darwin_cpp_builtins (cpp_reader *pfile) 647 { 648 builtin_define ("__MACH__"); 649 builtin_define ("__APPLE__"); 650 651 /* __APPLE_CC__ is defined as some old Apple include files expect it 652 to be defined and won't work if it isn't. */ 653 builtin_define_with_value ("__APPLE_CC__", "1", false); 654 655 if (darwin_constant_cfstrings) 656 builtin_define ("__CONSTANT_CFSTRINGS__"); 657 658 builtin_define_with_value ("__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__", 659 version_as_macro(), false); 660 661 /* Since we do not (at 4.6) support ObjC gc for the NeXT runtime, the 662 following will cause a syntax error if one tries to compile gc attributed 663 items. However, without this, NeXT system headers cannot be parsed 664 properly (on systems >= darwin 9). */ 665 if (flag_objc_gc) 666 { 667 builtin_define ("__strong=__attribute__((objc_gc(strong)))"); 668 builtin_define ("__weak=__attribute__((objc_gc(weak)))"); 669 builtin_define ("__OBJC_GC__"); 670 } 671 else 672 { 673 builtin_define ("__strong="); 674 builtin_define ("__weak="); 675 } 676 677 if (CPP_OPTION (pfile, objc) && flag_objc_abi == 2) 678 builtin_define ("__OBJC2__"); 679 } 680 681 /* Handle C family front-end options. */ 682 683 static bool 684 handle_c_option (size_t code, 685 const char *arg, 686 int value ATTRIBUTE_UNUSED) 687 { 688 switch (code) 689 { 690 default: 691 /* Unrecognized options that we said we'd handle turn into 692 errors if not listed here. */ 693 return false; 694 695 case OPT_iframework: 696 add_system_framework_path (xstrdup (arg)); 697 break; 698 699 case OPT_fapple_kext: 700 ; 701 } 702 703 /* We recognized the option. */ 704 return true; 705 } 706 707 /* Allow ObjC* access to CFStrings. */ 708 static tree 709 darwin_objc_construct_string (tree str) 710 { 711 if (!darwin_constant_cfstrings) 712 { 713 /* Even though we are not using CFStrings, place our literal 714 into the cfstring_htab hash table, so that the 715 darwin_constant_cfstring_p() function will see it. */ 716 darwin_enter_string_into_cfstring_table (str); 717 /* Fall back to NSConstantString. */ 718 return NULL_TREE; 719 } 720 721 return darwin_build_constant_cfstring (str); 722 } 723 724 /* The string ref type is created as CFStringRef by <CFBase.h> therefore, we 725 must match for it explicitly, since it's outside the gcc code. */ 726 727 static bool 728 darwin_cfstring_ref_p (const_tree strp) 729 { 730 tree tn; 731 if (!strp || TREE_CODE (strp) != POINTER_TYPE) 732 return false; 733 734 tn = TYPE_NAME (strp); 735 if (tn) 736 tn = DECL_NAME (tn); 737 return (tn 738 && IDENTIFIER_POINTER (tn) 739 && !strncmp (IDENTIFIER_POINTER (tn), "CFStringRef", 8)); 740 } 741 742 /* At present the behavior of this is undefined and it does nothing. */ 743 static void 744 darwin_check_cfstring_format_arg (tree ARG_UNUSED (format_arg), 745 tree ARG_UNUSED (args_list)) 746 { 747 } 748 749 /* The extra format types we recognize. */ 750 EXPORTED_CONST format_kind_info darwin_additional_format_types[] = { 751 { "CFString", NULL, NULL, NULL, NULL, 752 NULL, NULL, 753 FMT_FLAG_ARG_CONVERT|FMT_FLAG_PARSE_ARG_CONVERT_EXTERNAL, 0, 0, 0, 0, 0, 0, 754 NULL, NULL 755 } 756 }; 757 758 759 /* Support routines to dump the class references for NeXT ABI v1, aka 760 32-bits ObjC-2.0, as top-level asms. 761 The following two functions should only be called from 762 objc/objc-next-runtime-abi-01.c. */ 763 764 static void 765 darwin_objc_declare_unresolved_class_reference (const char *name) 766 { 767 const char *lazy_reference = ".lazy_reference\t"; 768 const char *hard_reference = ".reference\t"; 769 const char *reference = MACHOPIC_INDIRECT ? lazy_reference : hard_reference; 770 size_t len = strlen (reference) + strlen(name) + 2; 771 char *buf = (char *) alloca (len); 772 773 gcc_checking_assert (!strncmp (name, ".objc_class_name_", 17)); 774 775 snprintf (buf, len, "%s%s", reference, name); 776 symtab->finalize_toplevel_asm (build_string (strlen (buf), buf)); 777 } 778 779 static void 780 darwin_objc_declare_class_definition (const char *name) 781 { 782 const char *xname = targetm.strip_name_encoding (name); 783 size_t len = strlen (xname) + 7 + 5; 784 char *buf = (char *) alloca (len); 785 786 gcc_checking_assert (!strncmp (name, ".objc_class_name_", 17) 787 || !strncmp (name, "*.objc_category_name_", 21)); 788 789 /* Mimic default_globalize_label. */ 790 snprintf (buf, len, ".globl\t%s", xname); 791 symtab->finalize_toplevel_asm (build_string (strlen (buf), buf)); 792 793 snprintf (buf, len, "%s = 0", xname); 794 symtab->finalize_toplevel_asm (build_string (strlen (buf), buf)); 795 } 796 797 #undef TARGET_HANDLE_C_OPTION 798 #define TARGET_HANDLE_C_OPTION handle_c_option 799 800 #undef TARGET_OBJC_CONSTRUCT_STRING_OBJECT 801 #define TARGET_OBJC_CONSTRUCT_STRING_OBJECT darwin_objc_construct_string 802 803 #undef TARGET_OBJC_DECLARE_UNRESOLVED_CLASS_REFERENCE 804 #define TARGET_OBJC_DECLARE_UNRESOLVED_CLASS_REFERENCE \ 805 darwin_objc_declare_unresolved_class_reference 806 807 #undef TARGET_OBJC_DECLARE_CLASS_DEFINITION 808 #define TARGET_OBJC_DECLARE_CLASS_DEFINITION \ 809 darwin_objc_declare_class_definition 810 811 #undef TARGET_STRING_OBJECT_REF_TYPE_P 812 #define TARGET_STRING_OBJECT_REF_TYPE_P darwin_cfstring_ref_p 813 814 #undef TARGET_CHECK_STRING_OBJECT_FORMAT_ARG 815 #define TARGET_CHECK_STRING_OBJECT_FORMAT_ARG darwin_check_cfstring_format_arg 816 817 struct gcc_targetcm targetcm = TARGETCM_INITIALIZER; 818