gcc/config/darwin.h

   1 /* Target definitions for Darwin (Mac OS X) systems.
   2    Copyright (C) 1989, 1990, 1991, 1992, 1993, 2000, 2001, 2002
   3    Free Software Foundation, Inc.
   4    Contributed by Apple Computer Inc.
   5
   6 This file is part of GNU CC.
   7
   8 GNU CC is free software; you can redistribute it and/or modify
   9 it under the terms of the GNU General Public License as published by
  10 the Free Software Foundation; either version 2, or (at your option)
  11 any later version.
  12
  13 GNU CC is distributed in the hope that it will be useful,
  14 but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 GNU General Public License for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with GNU CC; see the file COPYING.  If not, write to
  20 the Free Software Foundation, 59 Temple Place - Suite 330,
  21 Boston, MA 02111-1307, USA.  */
  22
  23 /* The definitions in this file are common to all processor types
  24    running Darwin, which is the kernel for Mac OS X.  Darwin is
  25    basically a BSD user layer laid over a Mach kernel, then evolved
  26    for many years (at NeXT) in parallel with other Unix systems.  So
  27    while the runtime is a somewhat idiosyncratic Mach-based thing,
  28    other definitions look like they would for a BSD variant.  */
  29
  30 /* Although NeXT ran on many different architectures, as of Jan 2001
  31    the only supported Darwin targets are PowerPC and x86.  */
  32
  33 /* Technically, STANDARD_EXEC_PREFIX should be /usr/libexec/, but in
  34    practice this makes it hard to install new compilers elsewhere, so
  35    leave it undefined and expect system builders to set configure args
  36    correctly.  */
  37
  38 /* Suppress g++ attempt to link in the math library automatically.
  39    (Some Darwin versions have a libm, but they seem to cause problems
  40    for C++ executables.)  */
  41
  42 #define MATH_LIBRARY ""
  43
  44 /* We have atexit.  */
  45
  46 #define HAVE_ATEXIT
  47
  48 /* Define an empty body for the function do_global_dtors() in libgcc2.c.  */
  49
  50 #define DO_GLOBAL_DTORS_BODY
  51
  52 /* The string value for __SIZE_TYPE__.  */
  53
  54 #ifndef SIZE_TYPE
  55 #define SIZE_TYPE "long unsigned int"
  56 #endif
  57
  58 /* Type used for ptrdiff_t, as a string used in a declaration.  */
  59
  60 #undef  PTRDIFF_TYPE
  61 #define PTRDIFF_TYPE "int"
  62
  63 /* wchar_t is int.  */
  64
  65 #undef  WCHAR_TYPE
  66 #define WCHAR_TYPE "int"
  67 #undef  WCHAR_TYPE_SIZE
  68 #define WCHAR_TYPE_SIZE 32
  69
  70 /* Default to using the NeXT-style runtime, since that's what is
  71    pre-installed on Darwin systems.  */
  72
  73 #define NEXT_OBJC_RUNTIME
  74
  75 /* Don't default to pcc-struct-return, because gcc is the only compiler, and
  76    we want to retain compatibility with older gcc versions.  */
  77
  78 #undef  DEFAULT_PCC_STRUCT_RETURN
  79 #define DEFAULT_PCC_STRUCT_RETURN 0
  80
  81 /* Don't warn about MacOS-style 'APPL' four-char-constants.  */
  82
  83 #undef WARN_FOUR_CHAR_CONSTANTS
  84 #define WARN_FOUR_CHAR_CONSTANTS 0
  85
  86 /* Machine dependent cpp options.  */
  87
  88 #undef  CPP_SPEC
  89 #define CPP_SPEC "%{static:-D__STATIC__}%{!static:-D__DYNAMIC__}"
  90
  91 /* Machine dependent libraries.  */
  92
  93 #undef  LIB_SPEC
  94 #define LIB_SPEC "%{!static:-lSystem}"
  95
  96 /* We specify crt0.o as -lcrt0.o so that ld will search the library path. */
  97
  98 #undef  STARTFILE_SPEC
  99 #define STARTFILE_SPEC  \
 100   "%{pg:%{static:-lgcrt0.o}%{!static:-lgcrt1.o}} \
 101     %{!pg:%{static:-lcrt0.o}%{!static:-lcrt1.o}}"
 102
 103 #undef  DOLLARS_IN_IDENTIFIERS
 104 #define DOLLARS_IN_IDENTIFIERS 2
 105
 106 /* Allow #sccs (but don't do anything). */
 107
 108 #define SCCS_DIRECTIVE
 109
 110 /* We use Dbx symbol format.  */
 111
 112 #define DBX_DEBUGGING_INFO
 113
 114 /* Also enable Dwarf 2 as an option.  */
 115
 116 #define DWARF2_DEBUGGING_INFO
 117
 118 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
 119
 120 /* When generating stabs debugging, use N_BINCL entries.  */
 121
 122 #define DBX_USE_BINCL
 123
 124 /* There is no limit to the length of stabs strings.  */
 125
 126 #define DBX_CONTIN_LENGTH 0
 127
 128 /* gdb needs a null N_SO at the end of each file for scattered loading. */
 129
 130 #undef  DBX_OUTPUT_MAIN_SOURCE_FILE_END
 131 #define DBX_OUTPUT_MAIN_SOURCE_FILE_END(FILE, FILENAME)                 \
 132 do { text_section ();                                                   \
 133      fprintf (FILE,                                                     \
 134               "\t.stabs \"%s\",%d,0,0,Letext\nLetext:\n", "" , N_SO);   \
 135    } while (0)
 136
 137 /* Our profiling scheme doesn't LP labels and counter words.  */
 138
 139 #define NO_PROFILE_COUNTERS
 140
 141 #undef  INIT_SECTION_ASM_OP
 142 #define INIT_SECTION_ASM_OP
 143
 144 #undef  INVOKE__main
 145
 146 #define TARGET_ASM_CONSTRUCTOR  machopic_asm_out_constructor
 147 #define TARGET_ASM_DESTRUCTOR   machopic_asm_out_destructor
 148
 149
 150 /* Don't output a .file directive.  That is only used by the assembler for
 151    error reporting.  */
 152
 153 #undef  ASM_FILE_START
 154 #define ASM_FILE_START(FILE)
 155
 156 #undef  ASM_FILE_END
 157 #define ASM_FILE_END(FILE)                                      \
 158   do {                                                          \
 159     machopic_finish (asm_out_file);                             \
 160     if (strcmp (lang_hooks.name, "GNU C++") == 0)               \
 161       {                                                         \
 162         constructor_section ();                                 \
 163         destructor_section ();                                  \
 164         ASM_OUTPUT_ALIGN (FILE, 1);                             \
 165       }                                                         \
 166   } while (0)
 167
 168 #undef ASM_OUTPUT_LABEL
 169 #define ASM_OUTPUT_LABEL(FILE,NAME)     \
 170   do { assemble_name (FILE, NAME); fputs (":\n", FILE); } while (0)
 171
 172 #define ASM_OUTPUT_SKIP(FILE,SIZE)  \
 173   fprintf (FILE, "\t.space %d\n", SIZE)
 174
 175 /* Give ObjC methods pretty symbol names. */
 176
 177 #undef  OBJC_GEN_METHOD_LABEL
 178 #define OBJC_GEN_METHOD_LABEL(BUF,IS_INST,CLASS_NAME,CAT_NAME,SEL_NAME,NUM) \
 179   do { if (CAT_NAME)                                                    \
 180          sprintf (BUF, "%c[%s(%s) %s]", (IS_INST) ? '-' : '+',          \
 181                   (CLASS_NAME), (CAT_NAME), (SEL_NAME));                \
 182        else                                                             \
 183          sprintf (BUF, "%c[%s %s]", (IS_INST) ? '-' : '+',              \
 184                   (CLASS_NAME), (SEL_NAME));                            \
 185      } while (0)
 186
 187 /* The RTTI data (e.g., __ti4name) is common and public (and static),
 188    but it does need to be referenced via indirect PIC data pointers.
 189    The machopic_define_name calls are telling the machopic subsystem
 190    that the name *is* defined in this module, so it doesn't need to
 191    make them indirect.  */
 192
 193 #undef ASM_DECLARE_OBJECT_NAME
 194 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL)                       \
 195   do {                                                                  \
 196     const char *xname = NAME;                                           \
 197     if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF)             \
 198       xname = IDENTIFIER_POINTER (DECL_NAME (DECL));                    \
 199     if ((TREE_STATIC (DECL)                                             \
 200          && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))               \
 201         || DECL_INITIAL (DECL))                                         \
 202       machopic_define_name (xname);                                     \
 203     if ((TREE_STATIC (DECL)                                             \
 204          && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))               \
 205         || DECL_INITIAL (DECL))                                         \
 206       (* targetm.encode_section_info) (DECL, false);                    \
 207     ASM_OUTPUT_LABEL (FILE, xname);                                     \
 208   } while (0)
 209
 210 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL)                     \
 211   do {                                                                  \
 212     const char *xname = NAME;                                           \
 213     if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF)             \
 214       xname = IDENTIFIER_POINTER (DECL_NAME (DECL));                    \
 215     if ((TREE_STATIC (DECL)                                             \
 216          && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))               \
 217         || DECL_INITIAL (DECL))                                         \
 218       machopic_define_name (xname);                                     \
 219     if ((TREE_STATIC (DECL)                                             \
 220          && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))               \
 221         || DECL_INITIAL (DECL))                                         \
 222       (* targetm.encode_section_info) (DECL, false);                    \
 223     ASM_OUTPUT_LABEL (FILE, xname);                                     \
 224     /* Avoid generating stubs for functions we've just defined by       \
 225        outputting any required stub name label now.  */                 \
 226     machopic_output_possible_stub_label (FILE, xname);                  \
 227   } while (0)
 228
 229 /* Wrap new method names in quotes so the assembler doesn't gag.
 230    Make Objective-C internal symbols local.  */
 231
 232 #undef  ASM_OUTPUT_LABELREF
 233 #define ASM_OUTPUT_LABELREF(FILE,NAME)                                       \
 234   do {                                                                       \
 235        const char *xname = darwin_strip_name_encoding (NAME);                \
 236        if (xname[0] == '&' || xname[0] == '*')                               \
 237          {                                                                   \
 238            int len = strlen (xname);                                         \
 239            if (len > 6 && !strcmp ("$stub", xname + len - 5))                \
 240              machopic_validate_stub_or_non_lazy_ptr (xname, 1);              \
 241            else if (len > 7 && !strcmp ("$stub\"", xname + len - 6))         \
 242              machopic_validate_stub_or_non_lazy_ptr (xname, 1);              \
 243            else if (len > 14 && !strcmp ("$non_lazy_ptr", xname + len - 13)) \
 244              machopic_validate_stub_or_non_lazy_ptr (xname, 0);              \
 245            fputs (&xname[1], FILE);                                          \
 246          }                                                                   \
 247        else if (xname[0] == '+' || xname[0] == '-')                          \
 248          fprintf (FILE, "\"%s\"", xname);                                    \
 249        else if (!strncmp (xname, "_OBJC_", 6))                               \
 250          fprintf (FILE, "L%s", xname);                                       \
 251        else if (!strncmp (xname, ".objc_class_name_", 17))                   \
 252          fprintf (FILE, "%s", xname);                                        \
 253        else                                                                  \
 254          fprintf (FILE, "_%s", xname);                                       \
 255   } while (0)
 256
 257 /* Output before executable code.  */
 258 #undef TEXT_SECTION_ASM_OP
 259 #define TEXT_SECTION_ASM_OP ".text"
 260
 261 /* Output before writable data.  */
 262
 263 #undef DATA_SECTION_ASM_OP
 264 #define DATA_SECTION_ASM_OP ".data"
 265
 266 #undef  ALIGN_ASM_OP
 267 #define ALIGN_ASM_OP            ".align"
 268
 269 #undef  ASM_OUTPUT_ALIGN
 270 #define ASM_OUTPUT_ALIGN(FILE,LOG)      \
 271   if ((LOG) != 0)                       \
 272     fprintf (FILE, "\t%s %d\n", ALIGN_ASM_OP, (LOG))
 273
 274 /* Ensure correct alignment of bss data.  */
 275
 276 #undef  ASM_OUTPUT_ALIGNED_DECL_LOCAL
 277 #define ASM_OUTPUT_ALIGNED_DECL_LOCAL(FILE, DECL, NAME, SIZE, ALIGN)    \
 278   do {                                                                  \
 279     fputs (".lcomm ", (FILE));                                          \
 280     assemble_name ((FILE), (NAME));                                     \
 281     fprintf ((FILE), ",%u,%u\n", (SIZE),                                \
 282              floor_log2 ((ALIGN) / BITS_PER_UNIT));                     \
 283     if ((DECL) && ((TREE_STATIC (DECL)                                  \
 284          && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))               \
 285         || DECL_INITIAL (DECL)))                                        \
 286       (* targetm.encode_section_info) (DECL, false);                    \
 287     if ((DECL) && ((TREE_STATIC (DECL)                                  \
 288          && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))               \
 289         || DECL_INITIAL (DECL)))                                        \
 290       machopic_define_name (NAME);                                      \
 291   } while (0)
 292
 293 /* Output nothing for #ident.  */
 294
 295 #undef  ASM_OUTPUT_IDENT
 296 #define ASM_OUTPUT_IDENT(FILE, NAME)
 297
 298 /* The maximum alignment which the object file format can support.
 299    For Mach-O, this is 2^15.  */
 300
 301 #undef  MAX_OFILE_ALIGNMENT
 302 #define MAX_OFILE_ALIGNMENT 0x8000
 303
 304 /* Create new Mach-O sections. */
 305
 306 #undef  SECTION_FUNCTION
 307 #define SECTION_FUNCTION(FUNCTION, SECTION, DIRECTIVE, OBJC)            \
 308 extern void FUNCTION PARAMS ((void));                                   \
 309 void                                                                    \
 310 FUNCTION ()                                                             \
 311 {                                                                       \
 312   if (in_section != SECTION)                                            \
 313     {                                                                   \
 314       if (OBJC)                                                         \
 315         objc_section_init ();                                           \
 316       data_section ();                                                  \
 317       if (asm_out_file)                                                 \
 318         fprintf (asm_out_file, "%s\n", DIRECTIVE);                      \
 319       in_section = SECTION;                                             \
 320     }                                                                   \
 321 }                                                                       \
 322
 323 /* Darwin uses many types of special sections.  */
 324
 325 #undef  EXTRA_SECTIONS
 326 #define EXTRA_SECTIONS                                  \
 327   in_const, in_const_data, in_cstring, in_literal4, in_literal8,        \
 328   in_constructor, in_destructor, in_mod_init, in_mod_term,              \
 329   in_objc_class, in_objc_meta_class, in_objc_category,  \
 330   in_objc_class_vars, in_objc_instance_vars,            \
 331   in_objc_cls_meth, in_objc_inst_meth,                  \
 332   in_objc_cat_cls_meth, in_objc_cat_inst_meth,          \
 333   in_objc_selector_refs,                                \
 334   in_objc_selector_fixup,                               \
 335   in_objc_symbols, in_objc_module_info,                 \
 336   in_objc_protocol, in_objc_string_object,              \
 337   in_objc_constant_string_object,                       \
 338   in_objc_class_names, in_objc_meth_var_names,          \
 339   in_objc_meth_var_types, in_objc_cls_refs,             \
 340   in_machopic_nl_symbol_ptr,                            \
 341   in_machopic_lazy_symbol_ptr,                          \
 342   in_machopic_symbol_stub,                              \
 343   in_machopic_picsymbol_stub,                           \
 344   in_darwin_exception, in_darwin_eh_frame,              \
 345   num_sections
 346
 347 #undef  EXTRA_SECTION_FUNCTIONS
 348 #define EXTRA_SECTION_FUNCTIONS                 \
 349 static void objc_section_init PARAMS ((void));  \
 350 SECTION_FUNCTION (const_section,                \
 351                   in_const,                     \
 352                   ".const", 0)                  \
 353 SECTION_FUNCTION (const_data_section,           \
 354                   in_const_data,                \
 355                   ".const_data", 0)             \
 356 SECTION_FUNCTION (cstring_section,              \
 357                   in_cstring,                   \
 358                   ".cstring", 0)                \
 359 SECTION_FUNCTION (literal4_section,             \
 360                   in_literal4,                  \
 361                   ".literal4", 0)               \
 362 SECTION_FUNCTION (literal8_section,             \
 363                   in_literal8,                  \
 364                   ".literal8", 0)               \
 365 SECTION_FUNCTION (constructor_section,          \
 366                   in_constructor,               \
 367                   ".constructor", 0)            \
 368 SECTION_FUNCTION (mod_init_section,             \
 369                   in_mod_init,                  \
 370                   ".mod_init_func", 0)  \
 371 SECTION_FUNCTION (mod_term_section, \
 372                   in_mod_term,                  \
 373                   ".mod_term_func", 0)  \
 374 SECTION_FUNCTION (destructor_section,           \
 375                   in_destructor,                \
 376                   ".destructor", 0)             \
 377 SECTION_FUNCTION (objc_class_section,           \
 378                   in_objc_class,                \
 379                   ".objc_class", 1)             \
 380 SECTION_FUNCTION (objc_meta_class_section,      \
 381                   in_objc_meta_class,           \
 382                   ".objc_meta_class", 1)        \
 383 SECTION_FUNCTION (objc_category_section,        \
 384                   in_objc_category,             \
 385                 ".objc_category", 1)            \
 386 SECTION_FUNCTION (objc_class_vars_section,      \
 387                   in_objc_class_vars,           \
 388                   ".objc_class_vars", 1)        \
 389 SECTION_FUNCTION (objc_instance_vars_section,   \
 390                   in_objc_instance_vars,        \
 391                   ".objc_instance_vars", 1)     \
 392 SECTION_FUNCTION (objc_cls_meth_section,        \
 393                   in_objc_cls_meth,             \
 394                   ".objc_cls_meth", 1)  \
 395 SECTION_FUNCTION (objc_inst_meth_section,       \
 396                   in_objc_inst_meth,            \
 397                   ".objc_inst_meth", 1) \
 398 SECTION_FUNCTION (objc_cat_cls_meth_section,    \
 399                   in_objc_cat_cls_meth,         \
 400                   ".objc_cat_cls_meth", 1)      \
 401 SECTION_FUNCTION (objc_cat_inst_meth_section,   \
 402                   in_objc_cat_inst_meth,        \
 403                   ".objc_cat_inst_meth", 1)     \
 404 SECTION_FUNCTION (objc_selector_refs_section,   \
 405                   in_objc_selector_refs,        \
 406                   ".objc_message_refs", 1)      \
 407 SECTION_FUNCTION (objc_selector_fixup_section,  \
 408                   in_objc_selector_fixup,       \
 409                   ".section __OBJC, __sel_fixup", 1)    \
 410 SECTION_FUNCTION (objc_symbols_section,         \
 411                   in_objc_symbols,              \
 412                   ".objc_symbols", 1)   \
 413 SECTION_FUNCTION (objc_module_info_section,     \
 414                   in_objc_module_info,          \
 415                   ".objc_module_info", 1)       \
 416 SECTION_FUNCTION (objc_protocol_section,        \
 417                   in_objc_protocol,             \
 418                   ".objc_protocol", 1)  \
 419 SECTION_FUNCTION (objc_string_object_section,   \
 420                   in_objc_string_object,        \
 421                   ".objc_string_object", 1)     \
 422 SECTION_FUNCTION (objc_constant_string_object_section,  \
 423                   in_objc_constant_string_object,       \
 424                   ".section __OBJC, __cstring_object", 1)       \
 425 SECTION_FUNCTION (objc_class_names_section,     \
 426                 in_objc_class_names,            \
 427                 ".objc_class_names", 1) \
 428 SECTION_FUNCTION (objc_meth_var_names_section,  \
 429                 in_objc_meth_var_names,         \
 430                 ".objc_meth_var_names", 1)      \
 431 SECTION_FUNCTION (objc_meth_var_types_section,  \
 432                 in_objc_meth_var_types,         \
 433                 ".objc_meth_var_types", 1)      \
 434 SECTION_FUNCTION (objc_cls_refs_section,        \
 435                 in_objc_cls_refs,               \
 436                 ".objc_cls_refs", 1)            \
 437                                                 \
 438 SECTION_FUNCTION (machopic_lazy_symbol_ptr_section,     \
 439                 in_machopic_lazy_symbol_ptr,            \
 440                 ".lazy_symbol_pointer", 0)              \
 441 SECTION_FUNCTION (machopic_nl_symbol_ptr_section,       \
 442                 in_machopic_nl_symbol_ptr,              \
 443                 ".non_lazy_symbol_pointer", 0)          \
 444 SECTION_FUNCTION (machopic_symbol_stub_section,         \
 445                 in_machopic_symbol_stub,                \
 446                 ".symbol_stub", 0)                      \
 447 SECTION_FUNCTION (machopic_picsymbol_stub_section,      \
 448                 in_machopic_picsymbol_stub,             \
 449                 ".picsymbol_stub", 0)                   \
 450 SECTION_FUNCTION (darwin_exception_section,             \
 451                 in_darwin_exception,                    \
 452                 ".section __TEXT,__gcc_except_tab", 0)  \
 453 SECTION_FUNCTION (darwin_eh_frame_section,              \
 454                 in_darwin_eh_frame,                     \
 455                 ".section __TEXT,__eh_frame", 0)        \
 456                                                         \
 457 static void                                     \
 458 objc_section_init ()                            \
 459 {                                               \
 460   static int been_here = 0;                     \
 461                                                 \
 462   if (been_here == 0)                           \
 463     {                                           \
 464       been_here = 1;                            \
 465           /* written, cold -> hot */            \
 466       objc_cat_cls_meth_section ();             \
 467       objc_cat_inst_meth_section ();            \
 468       objc_string_object_section ();            \
 469       objc_constant_string_object_section ();   \
 470       objc_selector_refs_section ();            \
 471       objc_selector_fixup_section ();           \
 472       objc_cls_refs_section ();                 \
 473       objc_class_section ();                    \
 474       objc_meta_class_section ();               \
 475           /* shared, hot -> cold */             \
 476       objc_cls_meth_section ();                 \
 477       objc_inst_meth_section ();                \
 478       objc_protocol_section ();                 \
 479       objc_class_names_section ();              \
 480       objc_meth_var_types_section ();           \
 481       objc_meth_var_names_section ();           \
 482       objc_category_section ();                 \
 483       objc_class_vars_section ();               \
 484       objc_instance_vars_section ();            \
 485       objc_module_info_section ();              \
 486       objc_symbols_section ();                  \
 487     }                                           \
 488 }
 489
 490 #define READONLY_DATA_SECTION const_section
 491
 492 #undef  TARGET_ASM_SELECT_SECTION
 493 #define TARGET_ASM_SELECT_SECTION machopic_select_section
 494 #undef  TARGET_ASM_SELECT_RTX_SECTION
 495 #define TARGET_ASM_SELECT_RTX_SECTION machopic_select_rtx_section
 496
 497 #define ASM_DECLARE_UNRESOLVED_REFERENCE(FILE,NAME)                     \
 498     do {                                                                \
 499          if (FILE) {                                                    \
 500            if (flag_pic)                                                \
 501              fprintf (FILE, "\t.lazy_reference ");                      \
 502            else                                                         \
 503              fprintf (FILE, "\t.reference ");                           \
 504            assemble_name (FILE, NAME);                                  \
 505            fprintf (FILE, "\n");                                        \
 506          }                                                              \
 507        } while (0)
 508
 509 #define ASM_DECLARE_CLASS_REFERENCE(FILE,NAME)                          \
 510     do {                                                                \
 511          if (FILE) {                                                    \
 512            fprintf (FILE, "\t");                                        \
 513            assemble_name (FILE, NAME);                                  \
 514            fprintf (FILE, "=0\n");                                      \
 515            assemble_global (NAME);                                      \
 516          }                                                              \
 517        } while (0)
 518
 519 #undef ASM_GLOBALIZE_LABEL
 520 #define ASM_GLOBALIZE_LABEL(FILE,NAME)  \
 521  do { const char *const _x = (NAME); if (!!strncmp (_x, "_OBJC_", 6)) { \
 522   (fputs (".globl ", FILE), assemble_name (FILE, _x), fputs ("\n", FILE)); \
 523  }} while (0)
 524
 525 #undef ASM_GENERATE_INTERNAL_LABEL
 526 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM)   \
 527   sprintf (LABEL, "*%s%ld", PREFIX, (long)(NUM))
 528
 529 /* This is how to output an internal numbered label where PREFIX is
 530    the class of label and NUM is the number within the class.  */
 531
 532 #undef ASM_OUTPUT_INTERNAL_LABEL
 533 #define ASM_OUTPUT_INTERNAL_LABEL(FILE,PREFIX,NUM)      \
 534   fprintf (FILE, "%s%d:\n", PREFIX, NUM)
 535
 536 /* Since we have a separate readonly data section, define this so that
 537    jump tables end up in text rather than data.  */
 538
 539 #ifndef JUMP_TABLES_IN_TEXT_SECTION
 540 #define JUMP_TABLES_IN_TEXT_SECTION 1
 541 #endif
 542
 543 /* Symbolic names for various things we might know about a symbol.  */
 544
 545 enum machopic_addr_class {
 546   MACHOPIC_UNDEFINED,
 547   MACHOPIC_DEFINED_DATA,
 548   MACHOPIC_UNDEFINED_DATA,
 549   MACHOPIC_DEFINED_FUNCTION,
 550   MACHOPIC_UNDEFINED_FUNCTION
 551 };
 552
 553 /* Macros defining the various PIC cases.  */
 554
 555 #define MACHOPIC_INDIRECT      (flag_pic)
 556 #define MACHOPIC_JUST_INDIRECT (flag_pic == 1)
 557 #define MACHOPIC_PURE          (flag_pic == 2)
 558
 559 #define TARGET_ENCODE_SECTION_INFO  darwin_encode_section_info
 560 #define TARGET_STRIP_NAME_ENCODING  darwin_strip_name_encoding
 561
 562 #define GEN_BINDER_NAME_FOR_STUB(BUF,STUB,STUB_LENGTH)          \
 563   do {                                                          \
 564     const char *const stub_ = (STUB);                           \
 565     char *buffer_ = (BUF);                                      \
 566     strcpy (buffer_, stub_);                                    \
 567     if (stub_[0] == '"')                                        \
 568       {                                                         \
 569         strcpy (buffer_ + (STUB_LENGTH) - 1, "_binder\"");      \
 570       }                                                         \
 571     else                                                        \
 572       {                                                         \
 573         strcpy (buffer_ + (STUB_LENGTH), "_binder");            \
 574       }                                                         \
 575   } while (0)
 576
 577 #define GEN_SYMBOL_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH)    \
 578   do {                                                          \
 579     const char *const symbol_ = (SYMBOL);                       \
 580     char *buffer_ = (BUF);                                      \
 581     if (name_needs_quotes (symbol_) && symbol_[0] != '"')       \
 582       {                                                         \
 583           sprintf (buffer_, "\"%s\"", symbol_);                 \
 584       }                                                         \
 585     else                                                        \
 586       {                                                         \
 587         strcpy (buffer_, symbol_);                              \
 588       }                                                         \
 589   } while (0)
 590
 591 /* Given a symbol name string, create the lazy pointer version
 592    of the symbol name.  */
 593
 594 #define GEN_LAZY_PTR_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH)  \
 595   do {                                                          \
 596     const char *symbol_ = darwin_strip_name_encoding (SYMBOL);  \
 597     char *buffer_ = (BUF);                                      \
 598     if (symbol_[0] == '"')                                      \
 599       {                                                         \
 600         strcpy (buffer_, "\"L");                                \
 601         strcpy (buffer_ + 2, symbol_ + 1);                      \
 602         strcpy (buffer_ + (SYMBOL_LENGTH), "$lazy_ptr\"");      \
 603       }                                                         \
 604     else if (name_needs_quotes (symbol_))                       \
 605       {                                                         \
 606         strcpy (buffer_, "\"L");                                \
 607         strcpy (buffer_ + 2, symbol_);                          \
 608         strcpy (buffer_ + (SYMBOL_LENGTH) + 2, "$lazy_ptr\"");  \
 609       }                                                         \
 610     else                                                        \
 611       {                                                         \
 612         strcpy (buffer_, "L");                                  \
 613         strcpy (buffer_ + 1, symbol_);                          \
 614         strcpy (buffer_ + (SYMBOL_LENGTH) + 1, "$lazy_ptr");    \
 615       }                                                         \
 616   } while (0)
 617
 618 #define TARGET_ASM_EXCEPTION_SECTION darwin_exception_section
 619
 620 #define TARGET_ASM_EH_FRAME_SECTION darwin_eh_frame_section
 621
 622 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL)  \
 623   (((CODE) == 1 || (GLOBAL) == 0) ? DW_EH_PE_pcrel : DW_EH_PE_absptr)
 624
 625 #define DARWIN_REGISTER_TARGET_PRAGMAS(PFILE)                           \
 626   do {                                                                  \
 627     cpp_register_pragma (PFILE, 0, "mark", darwin_pragma_ignore);       \
 628     cpp_register_pragma (PFILE, 0, "options", darwin_pragma_options);   \
 629     cpp_register_pragma (PFILE, 0, "segment", darwin_pragma_ignore);    \
 630     cpp_register_pragma (PFILE, 0, "unused", darwin_pragma_unused);     \
 631   } while (0)
 632
 633 #undef ASM_APP_ON
 634 #define ASM_APP_ON ""
 635 #undef ASM_APP_OFF
 636 #define ASM_APP_OFF ""