gcc/config/darwin.h

   1 /* Target definitions for Darwin (Mac OS X) systems.
   2    Copyright (C) 1989, 1990, 1991, 1992, 1993, 2000, 2001, 2002, 2003, 2004
   3    Free Software Foundation, Inc.
   4    Contributed by Apple Computer Inc.
   5
   6 This file is part of GCC.
   7
   8 GCC 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 GCC 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 GCC; 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 #ifndef CONFIG_DARWIN_H
  24 #define CONFIG_DARWIN_H
  25
  26 /* The definitions in this file are common to all processor types
  27    running Darwin, which is the kernel for Mac OS X.  Darwin is
  28    basically a BSD user layer laid over a Mach kernel, then evolved
  29    for many years (at NeXT) in parallel with other Unix systems.  So
  30    while the runtime is a somewhat idiosyncratic Mach-based thing,
  31    other definitions look like they would for a BSD variant.  */
  32
  33 /* Although NeXT ran on many different architectures, as of Jan 2001
  34    the only supported Darwin targets are PowerPC and x86.  */
  35
  36 /* One of Darwin's NeXT legacies is the Mach-O format, which is partly
  37    like a.out and partly like COFF, with additional features like
  38    multi-architecture binary support.  */
  39
  40 #define OBJECT_FORMAT_MACHO
  41
  42 /* Suppress g++ attempt to link in the math library automatically.
  43    (Some Darwin versions have a libm, but they seem to cause problems
  44    for C++ executables.)  */
  45
  46 #define MATH_LIBRARY ""
  47
  48 /* We have atexit.  */
  49
  50 #define HAVE_ATEXIT
  51
  52 /* Define an empty body for the function do_global_dtors() in libgcc2.c.  */
  53
  54 #define DO_GLOBAL_DTORS_BODY
  55
  56 /* The string value for __SIZE_TYPE__.  */
  57
  58 #ifndef SIZE_TYPE
  59 #define SIZE_TYPE "long unsigned int"
  60 #endif
  61
  62 /* Type used for ptrdiff_t, as a string used in a declaration.  */
  63
  64 #undef  PTRDIFF_TYPE
  65 #define PTRDIFF_TYPE "int"
  66
  67 /* wchar_t is int.  */
  68
  69 #undef  WCHAR_TYPE
  70 #define WCHAR_TYPE "int"
  71 #undef  WCHAR_TYPE_SIZE
  72 #define WCHAR_TYPE_SIZE 32
  73
  74 /* Default to using the NeXT-style runtime, since that's what is
  75    pre-installed on Darwin systems.  */
  76
  77 #define NEXT_OBJC_RUNTIME
  78
  79 /* Don't default to pcc-struct-return, because gcc is the only compiler, and
  80    we want to retain compatibility with older gcc versions.  */
  81
  82 #undef  DEFAULT_PCC_STRUCT_RETURN
  83 #define DEFAULT_PCC_STRUCT_RETURN 0
  84
  85 /* This table intercepts weirdo options whose names would interfere
  86    with normal driver conventions, and either translates them into
  87    standardly-named options, or adds a 'Z' so that they can get to
  88    specs processing without interference.
  89
  90    Do not expand a linker option to "-Xlinker -<option>", since that
  91    forfeits the ability to control via spec strings later.  However,
  92    as a special exception, do this translation with -filelist, because
  93    otherwise the driver will think there are no input files and quit.
  94    (The alternative would be to hack the driver to recognize -filelist
  95    specially, but it's simpler to use the translation table.)
  96
  97    Note that an option name with a prefix that matches another option
  98    name, that also takes an argument, needs to be modified so the
  99    prefix is different, otherwise a '*' after the shorter option will
 100    match with the longer one.
 101
 102    The SUBTARGET_OPTION_TRANSLATE_TABLE macro, which _must_ be defined
 103    in gcc/config/{i386,rs6000}/darwin.h, should contain any additional
 104    command-line option translations specific to the particular target
 105    architecture.  */
 106
 107 #define TARGET_OPTION_TRANSLATE_TABLE \
 108   { "-all_load", "-Zall_load" },  \
 109   { "-allowable_client", "-Zallowable_client" },  \
 110   { "-arch_errors_fatal", "-Zarch_errors_fatal" },  \
 111   { "-bind_at_load", "-Zbind_at_load" },  \
 112   { "-bundle", "-Zbundle" },  \
 113   { "-bundle_loader", "-Zbundle_loader" },  \
 114   { "-weak_reference_mismatches", "-Zweak_reference_mismatches" },  \
 115   { "-dependency-file", "-MF" }, \
 116   { "-dylib_file", "-Zdylib_file" }, \
 117   { "-dynamic", "-Zdynamic" },  \
 118   { "-dynamiclib", "-Zdynamiclib" },  \
 119   { "-exported_symbols_list", "-Zexported_symbols_list" },  \
 120   { "-seg_addr_table_filename", "-Zseg_addr_table_filename" }, \
 121   { "-filelist", "-Xlinker -filelist -Xlinker" },  \
 122   { "-framework", "-Xlinker -framework -Xlinker" },  \
 123   { "-flat_namespace", "-Zflat_namespace" },  \
 124   { "-force_cpusubtype_ALL", "-Zforce_cpusubtype_ALL" },  \
 125   { "-force_flat_namespace", "-Zforce_flat_namespace" },  \
 126   { "-image_base", "-Zimage_base" },  \
 127   { "-init", "-Zinit" },  \
 128   { "-install_name", "-Zinstall_name" },  \
 129   { "-multiply_defined_unused", "-Zmultiplydefinedunused" },  \
 130   { "-multiply_defined", "-Zmultiply_defined" },  \
 131   { "-multi_module", "-Zmulti_module" },  \
 132   { "-static", "-static -Wa,-static" },  \
 133   { "-single_module", "-Zsingle_module" },  \
 134   { "-unexported_symbols_list", "-Zunexported_symbols_list" }, \
 135   SUBTARGET_OPTION_TRANSLATE_TABLE
 136
 137 /* These compiler options take n arguments.  */
 138
 139 #undef  WORD_SWITCH_TAKES_ARG
 140 #define WORD_SWITCH_TAKES_ARG(STR)              \
 141   (DEFAULT_WORD_SWITCH_TAKES_ARG (STR) ? 1 :    \
 142    !strcmp (STR, "Zallowable_client") ? 1 :     \
 143    !strcmp (STR, "arch") ? 1 :                  \
 144    !strcmp (STR, "arch_only") ? 1 :             \
 145    !strcmp (STR, "Zbundle_loader") ? 1 :        \
 146    !strcmp (STR, "client_name") ? 1 :           \
 147    !strcmp (STR, "compatibility_version") ? 1 : \
 148    !strcmp (STR, "current_version") ? 1 :       \
 149    !strcmp (STR, "Zdylib_file") ? 1 :           \
 150    !strcmp (STR, "Zexported_symbols_list") ? 1 : \
 151    !strcmp (STR, "Zimage_base") ? 1 :           \
 152    !strcmp (STR, "Zinit") ? 1 :                 \
 153    !strcmp (STR, "Zinstall_name") ? 1 :         \
 154    !strcmp (STR, "Zmultiplydefinedunused") ? 1 : \
 155    !strcmp (STR, "Zmultiply_defined") ? 1 :     \
 156    !strcmp (STR, "precomp-trustfile") ? 1 :     \
 157    !strcmp (STR, "read_only_relocs") ? 1 :      \
 158    !strcmp (STR, "sectcreate") ? 3 :            \
 159    !strcmp (STR, "sectorder") ? 3 :             \
 160    !strcmp (STR, "Zseg_addr_table_filename") ?1 :\
 161    !strcmp (STR, "seg1addr") ? 1 :              \
 162    !strcmp (STR, "segprot") ? 3 :               \
 163    !strcmp (STR, "seg_addr_table") ? 1 :        \
 164    !strcmp (STR, "sub_library") ? 1 :           \
 165    !strcmp (STR, "sub_umbrella") ? 1 :          \
 166    !strcmp (STR, "umbrella") ? 1 :              \
 167    !strcmp (STR, "undefined") ? 1 :             \
 168    !strcmp (STR, "Zunexported_symbols_list") ? 1 : \
 169    !strcmp (STR, "Zweak_reference_mismatches") ? 1 : \
 170    !strcmp (STR, "pagezero_size") ? 1 :         \
 171    !strcmp (STR, "segs_read_only_addr") ? 1 :   \
 172    !strcmp (STR, "segs_read_write_addr") ? 1 :  \
 173    !strcmp (STR, "sectalign") ? 3 :             \
 174    !strcmp (STR, "sectobjectsymbols") ? 2 :     \
 175    !strcmp (STR, "segcreate") ? 3 :             \
 176    !strcmp (STR, "dylinker_install_name") ? 1 : \
 177    0)
 178
 179 /* Machine dependent cpp options.  __APPLE_CC__ is defined as the
 180    Apple include files expect it to be defined and won't work if it
 181    isn't.  */
 182
 183 #undef  CPP_SPEC
 184 #define CPP_SPEC "%{static:%{!dynamic:-D__STATIC__}}%{!static:-D__DYNAMIC__}\
 185     -D__APPLE_CC__=1"
 186
 187 /* This is mostly a clone of the standard LINK_COMMAND_SPEC, plus
 188    precomp, libtool, and fat build additions.  Also we
 189    don't specify a second %G after %L because libSystem is
 190    self-contained and doesn't need to link against libgcc.a.  */
 191 /* In general, random Darwin linker flags should go into LINK_SPEC
 192    instead of LINK_COMMAND_SPEC.  The command spec is better for
 193    specifying the handling of options understood by generic Unix
 194    linkers, and for positional arguments like libraries.  */
 195 #define LINK_COMMAND_SPEC "\
 196 %{!fdump=*:%{!fsyntax-only:%{!precomp:%{!c:%{!M:%{!MM:%{!E:%{!S:\
 197     %{!Zdynamiclib:%(linker)}%{Zdynamiclib:/usr/bin/libtool} \
 198     %{!Zdynamiclib:-arch %(darwin_arch)} \
 199     %{Zdynamiclib:-arch_only %(darwin_arch)} \
 200     %l %X %{d} %{s} %{t} %{Z} \
 201     %{!Zdynamiclib:%{A} %{e*} %{m} %{N} %{n} %{r} %{u*} %{x} %{z}} \
 202     %{@:-o %f%u.out}%{!@:%{o*}%{!o:-o a.out}} \
 203     %{!Zdynamiclib:%{!A:%{!nostdlib:%{!nostartfiles:%S}}}} \
 204     %{L*} %(link_libgcc) %o %{fprofile-arcs|fprofile-generate:-lgcov} \
 205     %{!nostdlib:%{!nodefaultlibs:%G %L}} \
 206     %{!A:%{!nostdlib:%{!nostartfiles:%E}}} %{T*} %{F*} \
 207     %{!--help:%{!no-c++filt|c++filt:| c++filt3 }} }}}}}}}}"
 208
 209 /* Please keep the random linker options in alphabetical order (modulo
 210    'Z' and 'no' prefixes).  Options that can only go to one of libtool
 211    or ld must be listed twice, under both !Zdynamiclib and
 212    Zdynamiclib, with one of the cases reporting an error.  */
 213 /* Note that options taking arguments may appear multiple times on a
 214    command line with different arguments each time, so put a * after
 215    their names so all of them get passed.  */
 216 #define LINK_SPEC  \
 217   "%{static}%{!static:-dynamic} \
 218    %{!Zdynamiclib: \
 219      %{Zbundle:-bundle} \
 220      %{Zbundle_loader*:-bundle_loader %*} \
 221      %{client_name*} \
 222      %{compatibility_version*:%e-compatibility_version only allowed with -dynamiclib\
 223 } \
 224      %{current_version*:%e-current_version only allowed with -dynamiclib} \
 225      %{Zforce_cpusubtype_ALL:-force_cpusubtype_ALL} \
 226      %{Zforce_flat_namespace:-force_flat_namespace} \
 227      %{Zinstall_name*:%e-install_name only allowed with -dynamiclib} \
 228      %{keep_private_externs} \
 229      %{private_bundle} \
 230     } \
 231    %{Zdynamiclib: \
 232      %{Zbundle:%e-bundle not allowed with -dynamiclib} \
 233      %{Zbundle_loader*:%e-bundle_loader not allowed with -dynamiclib} \
 234      %{client_name*:%e-client_name not allowed with -dynamiclib} \
 235      %{compatibility_version*} \
 236      %{current_version*} \
 237      %{Zforce_cpusubtype_ALL:%e-force_cpusubtype_ALL not allowed with -dynamiclib} \
 238      %{Zforce_flat_namespace:%e-force_flat_namespace not allowed with -dynamiclib} \
 239      %{Zinstall_name*:-install_name %*} \
 240      %{keep_private_externs:%e-keep_private_externs not allowed with -dynamiclib} \
 241      %{private_bundle:%e-private_bundle not allowed with -dynamiclib} \
 242     } \
 243    %{Zall_load:-all_load}%{Zdynamiclib:%{!Zall_load:-noall_load}} \
 244    %{Zallowable_client*:-allowable_client %*} \
 245    %{Zbind_at_load:-bind_at_load} \
 246    %{Zarch_errors_fatal:-arch_errors_fatal} \
 247    %{Zdylib_file*:-dylib_file %*} \
 248    %{Zdynamic:-dynamic}\
 249    %{Zexported_symbols_list*:-exported_symbols_list %*} \
 250    %{Zflat_namespace:-flat_namespace} \
 251    %{headerpad_max_install_names*} \
 252    %{Zimage_base*:-image_base %*} \
 253    %{Zinit*:-init %*} \
 254    %{nomultidefs} \
 255    %{Zmulti_module:-multi_module} %{Zsingle_module:-single_module} \
 256    %{Zmultiply_defined*:-multiply_defined %*} \
 257    %{Zmultiplydefinedunused*:-multiply_defined_unused %*} \
 258    %{prebind} %{noprebind} %{nofixprebinding} %{prebind_all_twolevel_modules} \
 259    %{read_only_relocs} \
 260    %{sectcreate*} %{sectorder*} %{seg1addr*} %{segprot*} %{seg_addr_table*} \
 261    %{Zseg_addr_table_filename*:-seg_addr_table_filename %*} \
 262    %{sub_library*} %{sub_umbrella*} \
 263    %{twolevel_namespace} %{twolevel_namespace_hints} \
 264    %{umbrella*} \
 265    %{undefined*} \
 266    %{Zunexported_symbols_list*:-unexported_symbols_list %*} \
 267    %{Zweak_reference_mismatches*:-weak_reference_mismatches %*} \
 268    %{X} \
 269    %{y*} \
 270    %{w} \
 271    %{pagezero_size*} %{segs_read_*} %{seglinkedit} %{noseglinkedit}  \
 272    %{sectalign*} %{sectobjectsymbols*} %{segcreate*} %{whyload} \
 273    %{whatsloaded} %{dylinker_install_name*} \
 274    %{dylinker} %{Mach} "
 275
 276
 277 /* Machine dependent libraries.  */
 278
 279 #undef  LIB_SPEC
 280 #define LIB_SPEC "%{!static:-lSystem}"
 281
 282 /* We specify crt0.o as -lcrt0.o so that ld will search the library path.  */
 283
 284 #undef  STARTFILE_SPEC
 285 #define STARTFILE_SPEC  \
 286   "%{!Zdynamiclib:%{Zbundle:%{!static:-lbundle1.o}} \
 287      %{!Zbundle:%{pg:%{static:-lgcrt0.o} \
 288                      %{!static:%{object:-lgcrt0.o} \
 289                                %{!object:%{preload:-lgcrt0.o} \
 290                                  %{!preload:-lgcrt1.o -lcrt2.o}}}} \
 291                 %{!pg:%{static:-lcrt0.o} \
 292                       %{!static:%{object:-lcrt0.o} \
 293                                 %{!object:%{preload:-lcrt0.o} \
 294                                   %{!preload:-lcrt1.o -lcrt2.o}}}}}}"
 295
 296 /* The native Darwin linker doesn't necessarily place files in the order
 297    that they're specified on the link line.  Thus, it is pointless
 298    to put anything in ENDFILE_SPEC.  */
 299 /* #define ENDFILE_SPEC "" */
 300
 301 /* We use Dbx symbol format.  */
 302
 303 #define DBX_DEBUGGING_INFO 1
 304
 305 /* When generating stabs debugging, use N_BINCL entries.  */
 306
 307 #define DBX_USE_BINCL
 308
 309 /* There is no limit to the length of stabs strings.  */
 310
 311 #define DBX_CONTIN_LENGTH 0
 312
 313 /* gdb needs a null N_SO at the end of each file for scattered loading.  */
 314
 315 #undef  DBX_OUTPUT_MAIN_SOURCE_FILE_END
 316 #define DBX_OUTPUT_MAIN_SOURCE_FILE_END(FILE, FILENAME)                 \
 317 do { text_section ();                                                   \
 318      fprintf (FILE,                                                     \
 319               "\t.stabs \"%s\",%d,0,0,Letext\nLetext:\n", "" , N_SO);   \
 320    } while (0)
 321
 322 /* Making a symbols weak on Darwin requires more than just setting DECL_WEAK. */
 323 #define MAKE_DECL_ONE_ONLY(DECL) darwin_make_decl_one_only (DECL)
 324
 325 /* Representation of linkonce symbols for the MACH-O assembler. Linkonce
 326    symbols must be given a special section *and* must be preceded by a
 327    special assembler directive. */
 328 #define ASM_MAKE_LABEL_LINKONCE(FILE,  NAME)                            \
 329  do { const char* _x = (NAME); if (!!strncmp (_x, "_OBJC_", 6)) {       \
 330   fputs (".weak_definition ", FILE); assemble_name (FILE, _x);          \
 331   fputs ("\n", FILE); }} while (0)
 332
 333 /* We support hidden visibility */
 334 #undef TARGET_SUPPORTS_HIDDEN
 335 #define TARGET_SUPPORTS_HIDDEN 1
 336
 337 /* The Darwin linker imposes two limitations on common symbols: they
 338    can't have hidden visibility, and they can't appear in dylibs.  As
 339    a consequence, we should never use common symbols to represent
 340    vague linkage. */
 341 #undef USE_COMMON_FOR_ONE_ONLY
 342 #define USE_COMMON_FOR_ONE_ONLY 0
 343
 344 /* The Darwin linker doesn't like explicit template instantiations to be
 345    coalesced, because it doesn't want coalesced symbols to appear in
 346    a static archive's table of contents. */
 347 #undef TARGET_EXPLICIT_INSTANTIATIONS_ONE_ONLY
 348 #define TARGET_EXPLICIT_INSTANTIATIONS_ONE_ONLY 0
 349
 350 /* We make exception information linkonce. */
 351 #undef TARGET_USES_WEAK_UNWIND_INFO
 352 #define TARGET_USES_WEAK_UNWIND_INFO 1
 353
 354 /* We need to use a nonlocal label for the start of an EH frame: the
 355    Darwin linker requires that a coalesced section start with a label. */
 356 #undef FRAME_BEGIN_LABEL
 357 #define FRAME_BEGIN_LABEL "EH_frame"
 358
 359 /* Emit a label for the FDE corresponding to DECL.  EMPTY means
 360    emit a label for an empty FDE. */
 361 #define TARGET_ASM_EMIT_UNWIND_LABEL darwin_emit_unwind_label
 362
 363 /* Our profiling scheme doesn't LP labels and counter words.  */
 364
 365 #define NO_PROFILE_COUNTERS     1
 366
 367 #undef  INIT_SECTION_ASM_OP
 368 #define INIT_SECTION_ASM_OP
 369
 370 #undef  INVOKE__main
 371
 372 #define TARGET_ASM_CONSTRUCTOR  machopic_asm_out_constructor
 373 #define TARGET_ASM_DESTRUCTOR   machopic_asm_out_destructor
 374
 375 /* Always prefix with an underscore.  */
 376
 377 #define USER_LABEL_PREFIX "_"
 378
 379 /* Don't output a .file directive.  That is only used by the assembler for
 380    error reporting.  */
 381 #undef  TARGET_ASM_FILE_START_FILE_DIRECTIVE
 382 #define TARGET_ASM_FILE_START_FILE_DIRECTIVE false
 383
 384 #undef  TARGET_ASM_FILE_END
 385 #define TARGET_ASM_FILE_END darwin_file_end
 386
 387 #define ASM_OUTPUT_SKIP(FILE,SIZE)  \
 388   fprintf (FILE, "\t.space "HOST_WIDE_INT_PRINT_UNSIGNED"\n", SIZE)
 389
 390 /* Give ObjC methods pretty symbol names.  */
 391
 392 #undef  OBJC_GEN_METHOD_LABEL
 393 #define OBJC_GEN_METHOD_LABEL(BUF,IS_INST,CLASS_NAME,CAT_NAME,SEL_NAME,NUM) \
 394   do { if (CAT_NAME)                                                    \
 395          sprintf (BUF, "%c[%s(%s) %s]", (IS_INST) ? '-' : '+',          \
 396                   (CLASS_NAME), (CAT_NAME), (SEL_NAME));                \
 397        else                                                             \
 398          sprintf (BUF, "%c[%s %s]", (IS_INST) ? '-' : '+',              \
 399                   (CLASS_NAME), (SEL_NAME));                            \
 400      } while (0)
 401
 402 /* The RTTI data (e.g., __ti4name) is common and public (and static),
 403    but it does need to be referenced via indirect PIC data pointers.
 404    The machopic_define_name calls are telling the machopic subsystem
 405    that the name *is* defined in this module, so it doesn't need to
 406    make them indirect.  */
 407
 408 #undef ASM_DECLARE_OBJECT_NAME
 409 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL)                       \
 410   do {                                                                  \
 411     const char *xname = NAME;                                           \
 412     if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF)             \
 413       xname = IDENTIFIER_POINTER (DECL_NAME (DECL));                    \
 414     if (! DECL_ONE_ONLY (DECL) && ! DECL_WEAK (DECL))                   \
 415       if ((TREE_STATIC (DECL)                                           \
 416            && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))             \
 417           || DECL_INITIAL (DECL))                                       \
 418         machopic_define_name (xname);                                   \
 419     if ((TREE_STATIC (DECL)                                             \
 420          && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))               \
 421         || DECL_INITIAL (DECL))                                         \
 422       (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false);   \
 423     ASM_OUTPUT_LABEL (FILE, xname);                                     \
 424     /* Darwin doesn't support zero-size objects, so give them a \
 425        byte.  */                                                        \
 426     if (tree_low_cst (DECL_SIZE_UNIT (DECL), 1) == 0)                   \
 427       assemble_zeros (1);                                               \
 428   } while (0)
 429
 430 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL)                     \
 431   do {                                                                  \
 432     const char *xname = NAME;                                           \
 433     if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF)             \
 434       xname = IDENTIFIER_POINTER (DECL_NAME (DECL));                    \
 435     if (! DECL_ONE_ONLY (DECL) && ! DECL_WEAK (DECL))                   \
 436       if ((TREE_STATIC (DECL)                                           \
 437            && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))             \
 438           || DECL_INITIAL (DECL))                                       \
 439         machopic_define_name (xname);                                   \
 440     if ((TREE_STATIC (DECL)                                             \
 441          && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))               \
 442         || DECL_INITIAL (DECL))                                         \
 443       (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false);   \
 444     ASM_OUTPUT_LABEL (FILE, xname);                                     \
 445   } while (0)
 446
 447 #define ASM_DECLARE_CONSTANT_NAME(FILE, NAME, EXP, SIZE)        \
 448   do {                                                          \
 449     ASM_OUTPUT_LABEL (FILE, NAME);                              \
 450     /* Darwin doesn't support zero-size objects, so give them a \
 451        byte.  */                                                \
 452     if ((SIZE) == 0)                                            \
 453       assemble_zeros (1);                                       \
 454   } while (0)
 455
 456 /* Wrap new method names in quotes so the assembler doesn't gag.
 457    Make Objective-C internal symbols local.  */
 458
 459 #undef  ASM_OUTPUT_LABELREF
 460 #define ASM_OUTPUT_LABELREF(FILE,NAME)                                       \
 461   do {                                                                       \
 462        const char *xname = darwin_strip_name_encoding (NAME);                \
 463        if (! strcmp (xname, "<pic base>"))                                   \
 464          machopic_output_function_base_name(FILE);                           \
 465        else if (xname[0] == '&' || xname[0] == '*')                          \
 466          {                                                                   \
 467            int len = strlen (xname);                                         \
 468            if (len > 6 && !strcmp ("$stub", xname + len - 5))                \
 469              machopic_validate_stub_or_non_lazy_ptr (xname, 1);              \
 470            else if (len > 7 && !strcmp ("$stub\"", xname + len - 6))         \
 471              machopic_validate_stub_or_non_lazy_ptr (xname, 1);              \
 472            else if (len > 14 && !strcmp ("$non_lazy_ptr", xname + len - 13)) \
 473              machopic_validate_stub_or_non_lazy_ptr (xname, 0);              \
 474            fputs (&xname[1], FILE);                                          \
 475          }                                                                   \
 476        else if (xname[0] == '+' || xname[0] == '-')                          \
 477          fprintf (FILE, "\"%s\"", xname);                                    \
 478        else if (!strncmp (xname, "_OBJC_", 6))                               \
 479          fprintf (FILE, "L%s", xname);                                       \
 480        else if (!strncmp (xname, ".objc_class_name_", 17))                   \
 481          fprintf (FILE, "%s", xname);                                        \
 482        else                                                                  \
 483          fprintf (FILE, "_%s", xname);                                       \
 484   } while (0)
 485
 486 /* Output before executable code.  */
 487 #undef TEXT_SECTION_ASM_OP
 488 #define TEXT_SECTION_ASM_OP ".text"
 489
 490 /* Output before writable data.  */
 491
 492 #undef DATA_SECTION_ASM_OP
 493 #define DATA_SECTION_ASM_OP ".data"
 494
 495 #undef  ALIGN_ASM_OP
 496 #define ALIGN_ASM_OP            ".align"
 497
 498 #undef  ASM_OUTPUT_ALIGN
 499 #define ASM_OUTPUT_ALIGN(FILE,LOG)      \
 500   if ((LOG) != 0)                       \
 501     fprintf (FILE, "\t%s %d\n", ALIGN_ASM_OP, (LOG))
 502
 503 /* Ensure correct alignment of bss data.  */
 504
 505 #undef  ASM_OUTPUT_ALIGNED_DECL_LOCAL
 506 #define ASM_OUTPUT_ALIGNED_DECL_LOCAL(FILE, DECL, NAME, SIZE, ALIGN)    \
 507   do {                                                                  \
 508     fputs (".lcomm ", (FILE));                                          \
 509     assemble_name ((FILE), (NAME));                                     \
 510     fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED",%u\n", (SIZE),    \
 511              floor_log2 ((ALIGN) / BITS_PER_UNIT));                     \
 512     if ((DECL) && ((TREE_STATIC (DECL)                                  \
 513          && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))               \
 514         || DECL_INITIAL (DECL)))                                        \
 515       (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false);   \
 516     if ((DECL) && ((TREE_STATIC (DECL)                                  \
 517          && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))               \
 518         || DECL_INITIAL (DECL)))                                        \
 519       machopic_define_name (NAME);                                      \
 520   } while (0)
 521
 522 /* The maximum alignment which the object file format can support.
 523    For Mach-O, this is 2^15.  */
 524
 525 #undef  MAX_OFILE_ALIGNMENT
 526 #define MAX_OFILE_ALIGNMENT 0x8000
 527
 528 /* Create new Mach-O sections.  */
 529
 530 #undef  SECTION_FUNCTION
 531 #define SECTION_FUNCTION(FUNCTION, SECTION, DIRECTIVE, OBJC)            \
 532 extern void FUNCTION (void);                                            \
 533 void                                                                    \
 534 FUNCTION (void)                                                         \
 535 {                                                                       \
 536   if (in_section != SECTION)                                            \
 537     {                                                                   \
 538       if (OBJC)                                                         \
 539         objc_section_init ();                                           \
 540       data_section ();                                                  \
 541       if (asm_out_file)                                                 \
 542         fprintf (asm_out_file, "%s\n", DIRECTIVE);                      \
 543       in_section = SECTION;                                             \
 544     }                                                                   \
 545 }                                                                       \
 546
 547 /* Darwin uses many types of special sections.  */
 548
 549 #undef  EXTRA_SECTIONS
 550 #define EXTRA_SECTIONS                                  \
 551   in_const, in_const_data, in_cstring, in_literal4, in_literal8,        \
 552   in_constructor, in_destructor, in_mod_init, in_mod_term,              \
 553   in_objc_class, in_objc_meta_class, in_objc_category,  \
 554   in_objc_class_vars, in_objc_instance_vars,            \
 555   in_objc_cls_meth, in_objc_inst_meth,                  \
 556   in_objc_cat_cls_meth, in_objc_cat_inst_meth,          \
 557   in_objc_selector_refs,                                \
 558   in_objc_selector_fixup,                               \
 559   in_objc_symbols, in_objc_module_info,                 \
 560   in_objc_protocol, in_objc_string_object,              \
 561   in_objc_constant_string_object,                       \
 562   in_objc_image_info,                                   \
 563   in_objc_class_names, in_objc_meth_var_names,          \
 564   in_objc_meth_var_types, in_objc_cls_refs,             \
 565   in_machopic_nl_symbol_ptr,                            \
 566   in_machopic_lazy_symbol_ptr,                          \
 567   in_machopic_symbol_stub,                              \
 568   in_machopic_symbol_stub1,                             \
 569   in_machopic_picsymbol_stub,                           \
 570   in_machopic_picsymbol_stub1,                          \
 571   in_darwin_exception, in_darwin_eh_frame,              \
 572   num_sections
 573
 574 #undef  EXTRA_SECTION_FUNCTIONS
 575 #define EXTRA_SECTION_FUNCTIONS                 \
 576 static void objc_section_init (void);           \
 577 SECTION_FUNCTION (const_section,                \
 578                   in_const,                     \
 579                   ".const", 0)                  \
 580 SECTION_FUNCTION (const_data_section,           \
 581                   in_const_data,                \
 582                   ".const_data", 0)             \
 583 SECTION_FUNCTION (cstring_section,              \
 584                   in_cstring,                   \
 585                   ".cstring", 0)                \
 586 SECTION_FUNCTION (literal4_section,             \
 587                   in_literal4,                  \
 588                   ".literal4", 0)               \
 589 SECTION_FUNCTION (literal8_section,             \
 590                   in_literal8,                  \
 591                   ".literal8", 0)               \
 592 SECTION_FUNCTION (constructor_section,          \
 593                   in_constructor,               \
 594                   ".constructor", 0)            \
 595 SECTION_FUNCTION (mod_init_section,             \
 596                   in_mod_init,                  \
 597                   ".mod_init_func", 0)  \
 598 SECTION_FUNCTION (mod_term_section, \
 599                   in_mod_term,                  \
 600                   ".mod_term_func", 0)  \
 601 SECTION_FUNCTION (destructor_section,           \
 602                   in_destructor,                \
 603                   ".destructor", 0)             \
 604 SECTION_FUNCTION (objc_class_section,           \
 605                   in_objc_class,                \
 606                   ".objc_class", 1)             \
 607 SECTION_FUNCTION (objc_meta_class_section,      \
 608                   in_objc_meta_class,           \
 609                   ".objc_meta_class", 1)        \
 610 SECTION_FUNCTION (objc_category_section,        \
 611                   in_objc_category,             \
 612                 ".objc_category", 1)            \
 613 SECTION_FUNCTION (objc_class_vars_section,      \
 614                   in_objc_class_vars,           \
 615                   ".objc_class_vars", 1)        \
 616 SECTION_FUNCTION (objc_instance_vars_section,   \
 617                   in_objc_instance_vars,        \
 618                   ".objc_instance_vars", 1)     \
 619 SECTION_FUNCTION (objc_cls_meth_section,        \
 620                   in_objc_cls_meth,             \
 621                   ".objc_cls_meth", 1)  \
 622 SECTION_FUNCTION (objc_inst_meth_section,       \
 623                   in_objc_inst_meth,            \
 624                   ".objc_inst_meth", 1) \
 625 SECTION_FUNCTION (objc_cat_cls_meth_section,    \
 626                   in_objc_cat_cls_meth,         \
 627                   ".objc_cat_cls_meth", 1)      \
 628 SECTION_FUNCTION (objc_cat_inst_meth_section,   \
 629                   in_objc_cat_inst_meth,        \
 630                   ".objc_cat_inst_meth", 1)     \
 631 SECTION_FUNCTION (objc_selector_refs_section,   \
 632                   in_objc_selector_refs,        \
 633                   ".objc_message_refs", 1)      \
 634 SECTION_FUNCTION (objc_selector_fixup_section,  \
 635                   in_objc_selector_fixup,       \
 636                   ".section __OBJC, __sel_fixup", 1)    \
 637 SECTION_FUNCTION (objc_symbols_section,         \
 638                   in_objc_symbols,              \
 639                   ".objc_symbols", 1)   \
 640 SECTION_FUNCTION (objc_module_info_section,     \
 641                   in_objc_module_info,          \
 642                   ".objc_module_info", 1)       \
 643 SECTION_FUNCTION (objc_protocol_section,        \
 644                   in_objc_protocol,             \
 645                   ".objc_protocol", 1)  \
 646 SECTION_FUNCTION (objc_string_object_section,   \
 647                   in_objc_string_object,        \
 648                   ".objc_string_object", 1)     \
 649 SECTION_FUNCTION (objc_constant_string_object_section,  \
 650                   in_objc_constant_string_object,       \
 651                   ".section __OBJC, __cstring_object", 1)       \
 652 /* Fix-and-Continue image marker.  */           \
 653 SECTION_FUNCTION (objc_image_info_section,      \
 654                   in_objc_image_info,           \
 655                   ".section __OBJC, __image_info", 1)   \
 656 SECTION_FUNCTION (objc_class_names_section,     \
 657                 in_objc_class_names,            \
 658                 ".objc_class_names", 1) \
 659 SECTION_FUNCTION (objc_meth_var_names_section,  \
 660                 in_objc_meth_var_names,         \
 661                 ".objc_meth_var_names", 1)      \
 662 SECTION_FUNCTION (objc_meth_var_types_section,  \
 663                 in_objc_meth_var_types,         \
 664                 ".objc_meth_var_types", 1)      \
 665 SECTION_FUNCTION (objc_cls_refs_section,        \
 666                 in_objc_cls_refs,               \
 667                 ".objc_cls_refs", 1)            \
 668                                                 \
 669 SECTION_FUNCTION (machopic_lazy_symbol_ptr_section,     \
 670                 in_machopic_lazy_symbol_ptr,            \
 671                 ".lazy_symbol_pointer", 0)      \
 672 SECTION_FUNCTION (machopic_nl_symbol_ptr_section,       \
 673                 in_machopic_nl_symbol_ptr,              \
 674                 ".non_lazy_symbol_pointer", 0)  \
 675 SECTION_FUNCTION (machopic_symbol_stub_section,         \
 676                 in_machopic_symbol_stub,                \
 677                 ".symbol_stub", 0)              \
 678 SECTION_FUNCTION (machopic_symbol_stub1_section,        \
 679                 in_machopic_symbol_stub1,               \
 680                 ".section __TEXT,__symbol_stub1,symbol_stubs,pure_instructions,16", 0)\
 681 SECTION_FUNCTION (machopic_picsymbol_stub_section,      \
 682                 in_machopic_picsymbol_stub,             \
 683                 ".picsymbol_stub", 0)           \
 684 SECTION_FUNCTION (machopic_picsymbol_stub1_section,     \
 685                 in_machopic_picsymbol_stub1,            \
 686                 ".section __TEXT,__picsymbolstub1,symbol_stubs,pure_instructions,32", 0)\
 687 SECTION_FUNCTION (darwin_exception_section,             \
 688                 in_darwin_exception,                    \
 689                 ".section __DATA,__gcc_except_tab", 0)  \
 690 SECTION_FUNCTION (darwin_eh_frame_section,              \
 691                 in_darwin_eh_frame,                     \
 692                 ".section " EH_FRAME_SECTION_NAME ",__eh_frame" EH_FRAME_SECTION_ATTR, 0)  \
 693                                                         \
 694 static void                                     \
 695 objc_section_init (void)                        \
 696 {                                               \
 697   static int been_here = 0;                     \
 698                                                 \
 699   if (been_here == 0)                           \
 700     {                                           \
 701       been_here = 1;                            \
 702           /* written, cold -> hot */            \
 703       objc_cat_cls_meth_section ();             \
 704       objc_cat_inst_meth_section ();            \
 705       objc_string_object_section ();            \
 706       objc_constant_string_object_section ();   \
 707       objc_selector_refs_section ();            \
 708       objc_selector_fixup_section ();           \
 709       objc_cls_refs_section ();                 \
 710       objc_class_section ();                    \
 711       objc_meta_class_section ();               \
 712           /* shared, hot -> cold */             \
 713       objc_cls_meth_section ();                 \
 714       objc_inst_meth_section ();                \
 715       objc_protocol_section ();                 \
 716       objc_class_names_section ();              \
 717       objc_meth_var_types_section ();           \
 718       objc_meth_var_names_section ();           \
 719       objc_category_section ();                 \
 720       objc_class_vars_section ();               \
 721       objc_instance_vars_section ();            \
 722       objc_module_info_section ();              \
 723       objc_symbols_section ();                  \
 724     }                                           \
 725 }
 726
 727 #define READONLY_DATA_SECTION const_section
 728
 729 #undef  TARGET_ASM_SELECT_SECTION
 730 #define TARGET_ASM_SELECT_SECTION machopic_select_section
 731 #undef  TARGET_ASM_SELECT_RTX_SECTION
 732 #define TARGET_ASM_SELECT_RTX_SECTION machopic_select_rtx_section
 733 #undef  TARGET_ASM_UNIQUE_SECTION
 734 #define TARGET_ASM_UNIQUE_SECTION darwin_unique_section
 735
 736
 737
 738 #define ASM_DECLARE_UNRESOLVED_REFERENCE(FILE,NAME)                     \
 739     do {                                                                \
 740          if (FILE) {                                                    \
 741            if (MACHOPIC_INDIRECT)                                       \
 742              fprintf (FILE, "\t.lazy_reference ");                      \
 743            else                                                         \
 744              fprintf (FILE, "\t.reference ");                           \
 745            assemble_name (FILE, NAME);                                  \
 746            fprintf (FILE, "\n");                                        \
 747          }                                                              \
 748        } while (0)
 749
 750 #define ASM_DECLARE_CLASS_REFERENCE(FILE,NAME)                          \
 751     do {                                                                \
 752          if (FILE) {                                                    \
 753            fprintf (FILE, "\t");                                        \
 754            assemble_name (FILE, NAME);                                  \
 755            fprintf (FILE, "=0\n");                                      \
 756            (*targetm.asm_out.globalize_label) (FILE, NAME);             \
 757          }                                                              \
 758        } while (0)
 759
 760 /* Globalizing directive for a label.  */
 761 #define GLOBAL_ASM_OP ".globl "
 762 #define TARGET_ASM_GLOBALIZE_LABEL darwin_globalize_label
 763
 764 /* Emit an assembler directive to set visibility for a symbol.  Used
 765    to support visibility attribute and Darwin's private extern
 766    feature.  */
 767 #undef TARGET_ASM_ASSEMBLE_VISIBILITY
 768 #define TARGET_ASM_ASSEMBLE_VISIBILITY darwin_assemble_visibility
 769
 770
 771 #undef ASM_GENERATE_INTERNAL_LABEL
 772 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM)   \
 773   sprintf (LABEL, "*%s%ld", PREFIX, (long)(NUM))
 774
 775 /* Since we have a separate readonly data section, define this so that
 776    jump tables end up in text rather than data.  */
 777
 778 #ifndef JUMP_TABLES_IN_TEXT_SECTION
 779 #define JUMP_TABLES_IN_TEXT_SECTION 1
 780 #endif
 781
 782 /* Symbolic names for various things we might know about a symbol.  */
 783
 784 enum machopic_addr_class {
 785   MACHOPIC_UNDEFINED,
 786   MACHOPIC_DEFINED_DATA,
 787   MACHOPIC_UNDEFINED_DATA,
 788   MACHOPIC_DEFINED_FUNCTION,
 789   MACHOPIC_UNDEFINED_FUNCTION
 790 };
 791
 792 /* Macros defining the various PIC cases.  */
 793
 794 #define MACHO_DYNAMIC_NO_PIC_P  (TARGET_DYNAMIC_NO_PIC)
 795 #define MACHOPIC_INDIRECT       (flag_pic || MACHO_DYNAMIC_NO_PIC_P)
 796 #define MACHOPIC_JUST_INDIRECT  (flag_pic == 1 || MACHO_DYNAMIC_NO_PIC_P)
 797 #define MACHOPIC_PURE           (flag_pic == 2 && ! MACHO_DYNAMIC_NO_PIC_P)
 798
 799 #undef TARGET_ENCODE_SECTION_INFO
 800 #define TARGET_ENCODE_SECTION_INFO  darwin_encode_section_info
 801 #undef TARGET_STRIP_NAME_ENCODING
 802 #define TARGET_STRIP_NAME_ENCODING  darwin_strip_name_encoding
 803
 804 #define GEN_BINDER_NAME_FOR_STUB(BUF,STUB,STUB_LENGTH)          \
 805   do {                                                          \
 806     const char *const stub_ = (STUB);                           \
 807     char *buffer_ = (BUF);                                      \
 808     strcpy (buffer_, stub_);                                    \
 809     if (stub_[0] == '"')                                        \
 810       {                                                         \
 811         strcpy (buffer_ + (STUB_LENGTH) - 1, "_binder\"");      \
 812       }                                                         \
 813     else                                                        \
 814       {                                                         \
 815         strcpy (buffer_ + (STUB_LENGTH), "_binder");            \
 816       }                                                         \
 817   } while (0)
 818
 819 #define GEN_SYMBOL_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH)    \
 820   do {                                                          \
 821     const char *const symbol_ = (SYMBOL);                       \
 822     char *buffer_ = (BUF);                                      \
 823     if (name_needs_quotes (symbol_) && symbol_[0] != '"')       \
 824       {                                                         \
 825           sprintf (buffer_, "\"%s\"", symbol_);                 \
 826       }                                                         \
 827     else                                                        \
 828       {                                                         \
 829         strcpy (buffer_, symbol_);                              \
 830       }                                                         \
 831   } while (0)
 832
 833 /* Given a symbol name string, create the lazy pointer version
 834    of the symbol name.  */
 835
 836 #define GEN_LAZY_PTR_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH)  \
 837   do {                                                          \
 838     const char *symbol_ = darwin_strip_name_encoding (SYMBOL);  \
 839     char *buffer_ = (BUF);                                      \
 840     if (symbol_[0] == '"')                                      \
 841       {                                                         \
 842         strcpy (buffer_, "\"L");                                \
 843         strcpy (buffer_ + 2, symbol_ + 1);                      \
 844         strcpy (buffer_ + (SYMBOL_LENGTH), "$lazy_ptr\"");      \
 845       }                                                         \
 846     else if (name_needs_quotes (symbol_))                       \
 847       {                                                         \
 848         strcpy (buffer_, "\"L");                                \
 849         strcpy (buffer_ + 2, symbol_);                          \
 850         strcpy (buffer_ + (SYMBOL_LENGTH) + 2, "$lazy_ptr\"");  \
 851       }                                                         \
 852     else                                                        \
 853       {                                                         \
 854         strcpy (buffer_, "L");                                  \
 855         strcpy (buffer_ + 1, symbol_);                          \
 856         strcpy (buffer_ + (SYMBOL_LENGTH) + 1, "$lazy_ptr");    \
 857       }                                                         \
 858   } while (0)
 859
 860 #define TARGET_ASM_EXCEPTION_SECTION darwin_exception_section
 861
 862 #define TARGET_ASM_EH_FRAME_SECTION darwin_eh_frame_section
 863
 864 #define EH_FRAME_SECTION_NAME   "__TEXT"
 865 #define EH_FRAME_SECTION_ATTR ",coalesced,no_toc+strip_static_syms"
 866
 867 #undef ASM_PREFERRED_EH_DATA_FORMAT
 868 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL)  \
 869   (((CODE) == 2 && (GLOBAL) == 1) \
 870    ? (DW_EH_PE_pcrel | DW_EH_PE_indirect) : \
 871      ((CODE) == 1 || (GLOBAL) == 0) ? DW_EH_PE_pcrel : DW_EH_PE_absptr)
 872
 873 #define ASM_OUTPUT_DWARF_DELTA(FILE,SIZE,LABEL1,LABEL2)  \
 874   darwin_asm_output_dwarf_delta (FILE, SIZE, LABEL1, LABEL2)
 875
 876 #define ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX(ASM_OUT_FILE, ENCODING, SIZE, ADDR, DONE)     \
 877       if (ENCODING == ASM_PREFERRED_EH_DATA_FORMAT (2, 1)) {                            \
 878         darwin_non_lazy_pcrel (ASM_OUT_FILE, ADDR);                                     \
 879         goto DONE;                                                                      \
 880       }
 881
 882
 883 #define TARGET_TERMINATE_DW2_EH_FRAME_INFO false
 884
 885 #undef TARGET_ASM_NAMED_SECTION
 886 #define TARGET_ASM_NAMED_SECTION darwin_asm_named_section
 887 #undef TARGET_SECTION_TYPE_FLAGS
 888 #define TARGET_SECTION_TYPE_FLAGS darwin_section_type_flags
 889
 890 #define DARWIN_REGISTER_TARGET_PRAGMAS()                        \
 891   do {                                                          \
 892     c_register_pragma (0, "mark", darwin_pragma_ignore);        \
 893     c_register_pragma (0, "options", darwin_pragma_options);    \
 894     c_register_pragma (0, "segment", darwin_pragma_ignore);     \
 895     c_register_pragma (0, "unused", darwin_pragma_unused);      \
 896   } while (0)
 897
 898 #undef ASM_APP_ON
 899 #define ASM_APP_ON ""
 900 #undef ASM_APP_OFF
 901 #define ASM_APP_OFF ""
 902
 903 void darwin_register_frameworks (int);
 904 #define TARGET_EXTRA_INCLUDES darwin_register_frameworks
 905
 906 void add_framework_path (char *);
 907 #define TARGET_OPTF add_framework_path
 908
 909 #define TARGET_HAS_F_SETLKW
 910
 911 #endif /* CONFIG_DARWIN_H */