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    2005
   4    Free Software Foundation, Inc.
   5    Contributed by Apple Computer Inc.
   6
   7 This file is part of GCC.
   8
   9 GCC is free software; you can redistribute it and/or modify
  10 it under the terms of the GNU General Public License as published by
  11 the Free Software Foundation; either version 2, or (at your option)
  12 any later version.
  13
  14 GCC is distributed in the hope that it will be useful,
  15 but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 GNU General Public License for more details.
  18
  19 You should have received a copy of the GNU General Public License
  20 along with GCC; see the file COPYING.  If not, write to
  21 the Free Software Foundation, 51 Franklin Street, Fifth Floor,
  22 Boston, MA 02110-1301, USA.  */
  23
  24 #ifndef CONFIG_DARWIN_H
  25 #define CONFIG_DARWIN_H
  26
  27 /* The definitions in this file are common to all processor types
  28    running Darwin, which is the kernel for Mac OS X.  Darwin is
  29    basically a BSD user layer laid over a Mach kernel, then evolved
  30    for many years (at NeXT) in parallel with other Unix systems.  So
  31    while the runtime is a somewhat idiosyncratic Mach-based thing,
  32    other definitions look like they would for a BSD variant.  */
  33
  34 /* Although NeXT ran on many different architectures, as of Jan 2001
  35    the only supported Darwin targets are PowerPC and x86.  */
  36
  37 /* One of Darwin's NeXT legacies is the Mach-O format, which is partly
  38    like a.out and partly like COFF, with additional features like
  39    multi-architecture binary support.  */
  40
  41 #define OBJECT_FORMAT_MACHO
  42
  43 /* Suppress g++ attempt to link in the math library automatically. */
  44 #define MATH_LIBRARY ""
  45
  46 /* We have atexit.  */
  47
  48 #define HAVE_ATEXIT
  49
  50 /* Define an empty body for the function do_global_dtors() in libgcc2.c.  */
  51
  52 #define DO_GLOBAL_DTORS_BODY
  53
  54 /* The string value for __SIZE_TYPE__.  */
  55
  56 #ifndef SIZE_TYPE
  57 #define SIZE_TYPE "long unsigned int"
  58 #endif
  59
  60 /* Type used for ptrdiff_t, as a string used in a declaration.  */
  61
  62 #undef  PTRDIFF_TYPE
  63 #define PTRDIFF_TYPE "int"
  64
  65 /* wchar_t is int.  */
  66
  67 #undef  WCHAR_TYPE
  68 #define WCHAR_TYPE "int"
  69 #undef  WCHAR_TYPE_SIZE
  70 #define WCHAR_TYPE_SIZE 32
  71
  72 /* Default to using the NeXT-style runtime, since that's what is
  73    pre-installed on Darwin systems.  */
  74
  75 #define NEXT_OBJC_RUNTIME
  76
  77 /* Don't default to pcc-struct-return, because gcc is the only compiler, and
  78    we want to retain compatibility with older gcc versions.  */
  79
  80 #undef  DEFAULT_PCC_STRUCT_RETURN
  81 #define DEFAULT_PCC_STRUCT_RETURN 0
  82
  83 /* This table intercepts weirdo options whose names would interfere
  84    with normal driver conventions, and either translates them into
  85    standardly-named options, or adds a 'Z' so that they can get to
  86    specs processing without interference.
  87
  88    Do not expand a linker option to "-Xlinker -<option>", since that
  89    forfeits the ability to control via spec strings later.  However,
  90    as a special exception, do this translation with -filelist, because
  91    otherwise the driver will think there are no input files and quit.
  92    (The alternative would be to hack the driver to recognize -filelist
  93    specially, but it's simpler to use the translation table.)
  94
  95    Note that an option name with a prefix that matches another option
  96    name, that also takes an argument, needs to be modified so the
  97    prefix is different, otherwise a '*' after the shorter option will
  98    match with the longer one.
  99
 100    The SUBTARGET_OPTION_TRANSLATE_TABLE macro, which _must_ be defined
 101    in gcc/config/{i386,rs6000}/darwin.h, should contain any additional
 102    command-line option translations specific to the particular target
 103    architecture.  */
 104
 105 #define TARGET_OPTION_TRANSLATE_TABLE \
 106   { "-all_load", "-Zall_load" },  \
 107   { "-allowable_client", "-Zallowable_client" },  \
 108   { "-arch_errors_fatal", "-Zarch_errors_fatal" },  \
 109   { "-bind_at_load", "-Zbind_at_load" },  \
 110   { "-bundle", "-Zbundle" },  \
 111   { "-bundle_loader", "-Zbundle_loader" },  \
 112   { "-weak_reference_mismatches", "-Zweak_reference_mismatches" },  \
 113   { "-dead_strip", "-Zdead_strip" }, \
 114   { "-no_dead_strip_inits_and_terms", "-Zno_dead_strip_inits_and_terms" }, \
 115   { "-dependency-file", "-MF" }, \
 116   { "-dylib_file", "-Zdylib_file" }, \
 117   { "-dynamic", "-Zdynamic" },  \
 118   { "-dynamiclib", "-Zdynamiclib" },  \
 119   { "-exported_symbols_list", "-Zexported_symbols_list" },  \
 120   { "-gfull", "-g -fno-eliminate-unused-debug-symbols" }, \
 121   { "-gused", "-g -feliminate-unused-debug-symbols" }, \
 122   { "-segaddr", "-Zsegaddr" }, \
 123   { "-segs_read_only_addr", "-Zsegs_read_only_addr" }, \
 124   { "-segs_read_write_addr", "-Zsegs_read_write_addr" }, \
 125   { "-seg_addr_table", "-Zseg_addr_table" }, \
 126   { "-seg_addr_table_filename", "-Zseg_addr_table_filename" }, \
 127   { "-filelist", "-Xlinker -filelist -Xlinker" },  \
 128   { "-framework", "-Xlinker -framework -Xlinker" },  \
 129   { "-flat_namespace", "-Zflat_namespace" },  \
 130   { "-force_cpusubtype_ALL", "-Zforce_cpusubtype_ALL" },  \
 131   { "-force_flat_namespace", "-Zforce_flat_namespace" },  \
 132   { "-image_base", "-Zimage_base" },  \
 133   { "-init", "-Zinit" },  \
 134   { "-install_name", "-Zinstall_name" },  \
 135   { "-multiply_defined_unused", "-Zmultiplydefinedunused" },  \
 136   { "-multiply_defined", "-Zmultiply_defined" },  \
 137   { "-multi_module", "-Zmulti_module" },  \
 138   { "-static", "-static -Wa,-static" },  \
 139   { "-single_module", "-Zsingle_module" },  \
 140   { "-unexported_symbols_list", "-Zunexported_symbols_list" }, \
 141   SUBTARGET_OPTION_TRANSLATE_TABLE
 142
 143 #define SUBTARGET_OS_CPP_BUILTINS()                     \
 144   do                                                    \
 145     {                                                   \
 146       if (flag_pic)                                     \
 147         builtin_define ("__PIC__");                     \
 148     }                                                   \
 149   while (0)
 150
 151 /* These compiler options take n arguments.  */
 152
 153 #undef  WORD_SWITCH_TAKES_ARG
 154 #define WORD_SWITCH_TAKES_ARG(STR)              \
 155   (DEFAULT_WORD_SWITCH_TAKES_ARG (STR) ? 1 :    \
 156    !strcmp (STR, "Zallowable_client") ? 1 :     \
 157    !strcmp (STR, "arch") ? 1 :                  \
 158    !strcmp (STR, "arch_only") ? 1 :             \
 159    !strcmp (STR, "Zbundle_loader") ? 1 :        \
 160    !strcmp (STR, "client_name") ? 1 :           \
 161    !strcmp (STR, "compatibility_version") ? 1 : \
 162    !strcmp (STR, "current_version") ? 1 :       \
 163    !strcmp (STR, "Zdylib_file") ? 1 :           \
 164    !strcmp (STR, "Zexported_symbols_list") ? 1 : \
 165    !strcmp (STR, "Zimage_base") ? 1 :           \
 166    !strcmp (STR, "Zinit") ? 1 :                 \
 167    !strcmp (STR, "Zinstall_name") ? 1 :         \
 168    !strcmp (STR, "Zmultiplydefinedunused") ? 1 : \
 169    !strcmp (STR, "Zmultiply_defined") ? 1 :     \
 170    !strcmp (STR, "precomp-trustfile") ? 1 :     \
 171    !strcmp (STR, "read_only_relocs") ? 1 :      \
 172    !strcmp (STR, "sectcreate") ? 3 :            \
 173    !strcmp (STR, "sectorder") ? 3 :             \
 174    !strcmp (STR, "Zsegaddr") ? 2 :              \
 175    !strcmp (STR, "Zsegs_read_only_addr") ? 1 :  \
 176    !strcmp (STR, "Zsegs_read_write_addr") ? 1 : \
 177    !strcmp (STR, "Zseg_addr_table") ? 1 :       \
 178    !strcmp (STR, "Zseg_addr_table_filename") ?1 :\
 179    !strcmp (STR, "seg1addr") ? 1 :              \
 180    !strcmp (STR, "segprot") ? 3 :               \
 181    !strcmp (STR, "sub_library") ? 1 :           \
 182    !strcmp (STR, "sub_umbrella") ? 1 :          \
 183    !strcmp (STR, "umbrella") ? 1 :              \
 184    !strcmp (STR, "undefined") ? 1 :             \
 185    !strcmp (STR, "Zunexported_symbols_list") ? 1 : \
 186    !strcmp (STR, "Zweak_reference_mismatches") ? 1 : \
 187    !strcmp (STR, "pagezero_size") ? 1 :         \
 188    !strcmp (STR, "segs_read_only_addr") ? 1 :   \
 189    !strcmp (STR, "segs_read_write_addr") ? 1 :  \
 190    !strcmp (STR, "sectalign") ? 3 :             \
 191    !strcmp (STR, "sectobjectsymbols") ? 2 :     \
 192    !strcmp (STR, "segcreate") ? 3 :             \
 193    !strcmp (STR, "dylinker_install_name") ? 1 : \
 194    0)
 195
 196 /* Machine dependent cpp options.  Don't add more options here, add
 197    them to darwin_cpp_builtins in darwin-c.c.  */
 198
 199 #undef  CPP_SPEC
 200 #define CPP_SPEC "%{static:%{!dynamic:-D__STATIC__}}%{!static:-D__DYNAMIC__}"
 201
 202 /* This is mostly a clone of the standard LINK_COMMAND_SPEC, plus
 203    precomp, libtool, and fat build additions.  Also we
 204    don't specify a second %G after %L because libSystem is
 205    self-contained and doesn't need to link against libgcc.a.  */
 206 /* In general, random Darwin linker flags should go into LINK_SPEC
 207    instead of LINK_COMMAND_SPEC.  The command spec is better for
 208    specifying the handling of options understood by generic Unix
 209    linkers, and for positional arguments like libraries.  */
 210 #define LINK_COMMAND_SPEC "\
 211 %{!fdump=*:%{!fsyntax-only:%{!precomp:%{!c:%{!M:%{!MM:%{!E:%{!S:\
 212     %{!Zdynamiclib:%(linker)}%{Zdynamiclib:/usr/bin/libtool} \
 213     %l %X %{d} %{s} %{t} %{Z} \
 214     %{!Zdynamiclib:%{A} %{e*} %{m} %{N} %{n} %{r} %{u*} %{x} %{z}} \
 215     %{@:-o %f%u.out}%{!@:%{o*}%{!o:-o a.out}} \
 216     %{!Zdynamiclib:%{!A:%{!nostdlib:%{!nostartfiles:%S}}}} \
 217     %{L*} %(link_libgcc) %o %{fprofile-arcs|fprofile-generate|coverage:-lgcov} \
 218     %{!nostdlib:%{!nodefaultlibs:%(link_ssp) %G %L}} \
 219     %{!A:%{!nostdlib:%{!nostartfiles:%E}}} %{T*} %{F*} }}}}}}}}"
 220
 221 /* Please keep the random linker options in alphabetical order (modulo
 222    'Z' and 'no' prefixes).  Options that can only go to one of libtool
 223    or ld must be listed twice, under both !Zdynamiclib and
 224    Zdynamiclib, with one of the cases reporting an error.  */
 225 /* Note that options taking arguments may appear multiple times on a
 226    command line with different arguments each time, so put a * after
 227    their names so all of them get passed.  */
 228 #define LINK_SPEC  \
 229   "%{static}%{!static:-dynamic} \
 230    %{fgnu-runtime:%:replace-outfile(-lobjc -lobjc-gnu)}\
 231    %{!Zdynamiclib: \
 232      %{Zforce_cpusubtype_ALL:-arch %(darwin_arch) -force_cpusubtype_ALL} \
 233      %{!Zforce_cpusubtype_ALL:-arch %(darwin_subarch)} \
 234      %{Zbundle:-bundle} \
 235      %{Zbundle_loader*:-bundle_loader %*} \
 236      %{client_name*} \
 237      %{compatibility_version*:%e-compatibility_version only allowed with -dynamiclib\
 238 } \
 239      %{current_version*:%e-current_version only allowed with -dynamiclib} \
 240      %{Zforce_flat_namespace:-force_flat_namespace} \
 241      %{Zinstall_name*:%e-install_name only allowed with -dynamiclib} \
 242      %{keep_private_externs} \
 243      %{private_bundle} \
 244     } \
 245    %{Zdynamiclib: \
 246      %{Zbundle:%e-bundle not allowed with -dynamiclib} \
 247      %{Zbundle_loader*:%e-bundle_loader not allowed with -dynamiclib} \
 248      %{client_name*:%e-client_name not allowed with -dynamiclib} \
 249      %{compatibility_version*} \
 250      %{current_version*} \
 251      %{Zforce_cpusubtype_ALL:-arch_only %(darwin_arch)} \
 252      %{!Zforce_cpusubtype_ALL: -arch_only %(darwin_subarch)} \
 253      %{Zforce_flat_namespace:%e-force_flat_namespace not allowed with -dynamiclib} \
 254      %{Zinstall_name*:-install_name %*} \
 255      %{keep_private_externs:%e-keep_private_externs not allowed with -dynamiclib} \
 256      %{private_bundle:%e-private_bundle not allowed with -dynamiclib} \
 257     } \
 258    %{Zall_load:-all_load}%{Zdynamiclib:%{!Zall_load:-noall_load}} \
 259    %{Zallowable_client*:-allowable_client %*} \
 260    %{Zbind_at_load:-bind_at_load} \
 261    %{Zarch_errors_fatal:-arch_errors_fatal} \
 262    %{Zdead_strip:-dead_strip} \
 263    %{Zno_dead_strip_inits_and_terms:-no_dead_strip_inits_and_terms} \
 264    %{Zdylib_file*:-dylib_file %*} \
 265    %{Zdynamic:-dynamic}\
 266    %{Zexported_symbols_list*:-exported_symbols_list %*} \
 267    %{Zflat_namespace:-flat_namespace} \
 268    %{headerpad_max_install_names*} \
 269    %{Zimage_base*:-image_base %*} \
 270    %{Zinit*:-init %*} \
 271    %{mmacosx-version-min=*:-macosx_version_min %*} \
 272    %{nomultidefs} \
 273    %{Zmulti_module:-multi_module} %{Zsingle_module:-single_module} \
 274    %{Zmultiply_defined*:-multiply_defined %*} \
 275    %{Zmultiplydefinedunused*:-multiply_defined_unused %*} \
 276    %{prebind} %{noprebind} %{nofixprebinding} %{prebind_all_twolevel_modules} \
 277    %{read_only_relocs} \
 278    %{sectcreate*} %{sectorder*} %{seg1addr*} %{segprot*} \
 279    %{Zsegaddr*:-segaddr %*} \
 280    %{Zsegs_read_only_addr*:-segs_read_only_addr %*} \
 281    %{Zsegs_read_write_addr*:-segs_read_write_addr %*} \
 282    %{Zseg_addr_table*: -seg_addr_table %*} \
 283    %{Zseg_addr_table_filename*:-seg_addr_table_filename %*} \
 284    %{sub_library*} %{sub_umbrella*} \
 285    %{isysroot*:-syslibroot %*} \
 286    %{twolevel_namespace} %{twolevel_namespace_hints} \
 287    %{umbrella*} \
 288    %{undefined*} \
 289    %{Zunexported_symbols_list*:-unexported_symbols_list %*} \
 290    %{Zweak_reference_mismatches*:-weak_reference_mismatches %*} \
 291    %{!Zweak_reference_mismatches*:-weak_reference_mismatches non-weak} \
 292    %{X} \
 293    %{y*} \
 294    %{w} \
 295    %{pagezero_size*} %{segs_read_*} %{seglinkedit} %{noseglinkedit}  \
 296    %{sectalign*} %{sectobjectsymbols*} %{segcreate*} %{whyload} \
 297    %{whatsloaded} %{dylinker_install_name*} \
 298    %{dylinker} %{Mach} "
 299
 300
 301 /* Machine dependent libraries.  */
 302
 303 #define LIB_SPEC "%{!static:-lSystem}"
 304
 305 /* -dynamiclib implies -shared-libgcc just like -shared would on linux.
 306    Support -mmacosx-version-min by supplying different (stub) libgcc_s.dylib
 307    libraries to link against.  */
 308 #undef REAL_LIBGCC_SPEC
 309 #define REAL_LIBGCC_SPEC                                                \
 310    "%{static|static-libgcc:-lgcc -lgcc_eh;                              \
 311       :%{shared-libgcc|Zdynamiclib                                      \
 312          :%:version-compare(!> 10.5 mmacosx-version-min= -lgcc_s.10.4)  \
 313           %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_s.10.5)  \
 314           -lgcc;                                                        \
 315          :-lgcc -lgcc_eh}}"
 316
 317 /* We specify crt0.o as -lcrt0.o so that ld will search the library path.  */
 318 /* We don't want anything to do with crt2.o in the 64-bit case;
 319    testing the PowerPC-specific -m64 flag here is a little irregular,
 320    but it's overkill to make copies of this spec for each target
 321    arch.  */
 322
 323 #undef  STARTFILE_SPEC
 324 #define STARTFILE_SPEC  \
 325   "%{!Zdynamiclib:%{Zbundle:%{!static:-lbundle1.o}} \
 326      %{!Zbundle:%{pg:%{static:-lgcrt0.o} \
 327                      %{!static:%{object:-lgcrt0.o} \
 328                                %{!object:%{preload:-lgcrt0.o} \
 329                                  %{!preload:-lgcrt1.o %{!m64: crt2.o%s}}}}} \
 330                 %{!pg:%{static:-lcrt0.o} \
 331                       %{!static:%{object:-lcrt0.o} \
 332                                 %{!object:%{preload:-lcrt0.o} \
 333                                   %{!preload:-lcrt1.o %{!m64: crt2.o%s}}}}}}}"
 334
 335 /* The native Darwin linker doesn't necessarily place files in the order
 336    that they're specified on the link line.  Thus, it is pointless
 337    to put anything in ENDFILE_SPEC.  */
 338 /* #define ENDFILE_SPEC "" */
 339
 340 /* Default Darwin ASM_SPEC, very simple.  */
 341 #define ASM_SPEC "-arch %(darwin_arch) \
 342   %{Zforce_cpusubtype_ALL:-force_cpusubtype_ALL}"
 343
 344 /* We use Dbx symbol format.  */
 345
 346 #define DBX_DEBUGGING_INFO 1
 347
 348 /* Also enable Dwarf 2 as an option.  */
 349 #define DWARF2_DEBUGGING_INFO
 350 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
 351
 352 #define DEBUG_FRAME_SECTION   "__DWARFA,__debug_frame,coalesced,no_toc+strip_static_syms"
 353 #define DEBUG_INFO_SECTION    "__DWARFA,__debug_info"
 354 #define DEBUG_ABBREV_SECTION  "__DWARFA,__debug_abbrev"
 355 #define DEBUG_ARANGES_SECTION "__DWARFA,__debug_aranges"
 356 #define DEBUG_MACINFO_SECTION "__DWARFA,__debug_macinfo"
 357 #define DEBUG_LINE_SECTION    "__DWARFA,__debug_line"
 358 #define DEBUG_LOC_SECTION     "__DWARFA,__debug_loc"
 359 #define DEBUG_PUBNAMES_SECTION        "__DWARFA,__debug_pubnames"
 360 #define DEBUG_STR_SECTION     "__DWARFA,__debug_str"
 361 #define DEBUG_RANGES_SECTION  "__DWARFA,__debug_ranges"
 362
 363 /* When generating stabs debugging, use N_BINCL entries.  */
 364
 365 #define DBX_USE_BINCL
 366
 367 /* There is no limit to the length of stabs strings.  */
 368
 369 #define DBX_CONTIN_LENGTH 0
 370
 371 /* gdb needs a null N_SO at the end of each file for scattered loading.  */
 372
 373 #define DBX_OUTPUT_NULL_N_SO_AT_MAIN_SOURCE_FILE_END
 374
 375 /* GCC's definition of 'one_only' is the same as its definition of 'weak'.  */
 376 #define MAKE_DECL_ONE_ONLY(DECL) (DECL_WEAK (DECL) = 1)
 377
 378 /* Mach-O supports 'weak imports', and 'weak definitions' in coalesced
 379    sections.  machopic_select_section ensures that weak variables go in
 380    coalesced sections.  Weak aliases (or any other kind of aliases) are
 381    not supported.  Weak symbols that aren't visible outside the .s file
 382    are not supported.  */
 383 #define ASM_WEAKEN_DECL(FILE, DECL, NAME, ALIAS)                        \
 384   do {                                                                  \
 385     if (ALIAS)                                                          \
 386       {                                                                 \
 387         warning (0, "alias definitions not supported in Mach-O; ignored");      \
 388         break;                                                          \
 389       }                                                                 \
 390                                                                         \
 391     if (! DECL_EXTERNAL (DECL) && TREE_PUBLIC (DECL))                   \
 392       targetm.asm_out.globalize_label (FILE, NAME);                     \
 393     if (DECL_EXTERNAL (DECL))                                           \
 394       fputs ("\t.weak_reference ", FILE);                               \
 395     else if (! lookup_attribute ("weak", DECL_ATTRIBUTES (DECL))        \
 396         && lookup_attribute ("weak_import", DECL_ATTRIBUTES (DECL)))    \
 397       break;                                                            \
 398     else if (TREE_PUBLIC (DECL))                                        \
 399       fputs ("\t.weak_definition ", FILE);                              \
 400     else                                                                \
 401       break;                                                            \
 402     assemble_name (FILE, NAME);                                         \
 403     fputc ('\n', FILE);                                                 \
 404   } while (0)
 405
 406 /* Darwin has the pthread routines in libSystem, which every program
 407    links to, so there's no need for weak-ness for that.  */
 408 #define GTHREAD_USE_WEAK 0
 409
 410 /* The Darwin linker imposes two limitations on common symbols: they
 411    can't have hidden visibility, and they can't appear in dylibs.  As
 412    a consequence, we should never use common symbols to represent
 413    vague linkage. */
 414 #undef USE_COMMON_FOR_ONE_ONLY
 415 #define USE_COMMON_FOR_ONE_ONLY 0
 416
 417 /* The Darwin linker doesn't want coalesced symbols to appear in
 418    a static archive's table of contents. */
 419 #undef TARGET_WEAK_NOT_IN_ARCHIVE_TOC
 420 #define TARGET_WEAK_NOT_IN_ARCHIVE_TOC 1
 421
 422 /* We make exception information linkonce. */
 423 #undef TARGET_USES_WEAK_UNWIND_INFO
 424 #define TARGET_USES_WEAK_UNWIND_INFO 1
 425
 426 /* We need to use a nonlocal label for the start of an EH frame: the
 427    Darwin linker requires that a coalesced section start with a label. */
 428 #undef FRAME_BEGIN_LABEL
 429 #define FRAME_BEGIN_LABEL "EH_frame"
 430
 431 /* Emit a label for the FDE corresponding to DECL.  EMPTY means
 432    emit a label for an empty FDE. */
 433 #define TARGET_ASM_EMIT_UNWIND_LABEL darwin_emit_unwind_label
 434
 435 /* Our profiling scheme doesn't LP labels and counter words.  */
 436
 437 #define NO_PROFILE_COUNTERS     1
 438
 439 #undef  INIT_SECTION_ASM_OP
 440 #define INIT_SECTION_ASM_OP
 441
 442 #undef  INVOKE__main
 443
 444 #define TARGET_ASM_CONSTRUCTOR  machopic_asm_out_constructor
 445 #define TARGET_ASM_DESTRUCTOR   machopic_asm_out_destructor
 446
 447 /* Always prefix with an underscore.  */
 448
 449 #define USER_LABEL_PREFIX "_"
 450
 451 /* Don't output a .file directive.  That is only used by the assembler for
 452    error reporting.  */
 453 #undef  TARGET_ASM_FILE_START_FILE_DIRECTIVE
 454 #define TARGET_ASM_FILE_START_FILE_DIRECTIVE false
 455
 456 #undef  TARGET_ASM_FILE_END
 457 #define TARGET_ASM_FILE_END darwin_file_end
 458
 459 #define ASM_OUTPUT_SKIP(FILE,SIZE)  \
 460   fprintf (FILE, "\t.space "HOST_WIDE_INT_PRINT_UNSIGNED"\n", SIZE)
 461
 462 /* Give ObjC methods pretty symbol names.  */
 463
 464 #undef  OBJC_GEN_METHOD_LABEL
 465 #define OBJC_GEN_METHOD_LABEL(BUF,IS_INST,CLASS_NAME,CAT_NAME,SEL_NAME,NUM) \
 466   do { if (CAT_NAME)                                                    \
 467          sprintf (BUF, "%c[%s(%s) %s]", (IS_INST) ? '-' : '+',          \
 468                   (CLASS_NAME), (CAT_NAME), (SEL_NAME));                \
 469        else                                                             \
 470          sprintf (BUF, "%c[%s %s]", (IS_INST) ? '-' : '+',              \
 471                   (CLASS_NAME), (SEL_NAME));                            \
 472      } while (0)
 473
 474 /* The RTTI data (e.g., __ti4name) is common and public (and static),
 475    but it does need to be referenced via indirect PIC data pointers.
 476    The machopic_define_symbol calls are telling the machopic subsystem
 477    that the name *is* defined in this module, so it doesn't need to
 478    make them indirect.  */
 479
 480 #undef ASM_DECLARE_OBJECT_NAME
 481 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL)                       \
 482   do {                                                                  \
 483     const char *xname = NAME;                                           \
 484     if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF)             \
 485       xname = IDENTIFIER_POINTER (DECL_NAME (DECL));                    \
 486     if (! DECL_WEAK (DECL)                                              \
 487         && ((TREE_STATIC (DECL)                                         \
 488              && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))           \
 489             || DECL_INITIAL (DECL)))                                    \
 490         machopic_define_symbol (DECL_RTL (DECL));                       \
 491     if ((TREE_STATIC (DECL)                                             \
 492          && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))               \
 493         || DECL_INITIAL (DECL))                                         \
 494       (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false);   \
 495     ASM_OUTPUT_LABEL (FILE, xname);                                     \
 496     /* Darwin doesn't support zero-size objects, so give them a         \
 497        byte.  */                                                        \
 498     if (tree_low_cst (DECL_SIZE_UNIT (DECL), 1) == 0)                   \
 499       assemble_zeros (1);                                               \
 500   } while (0)
 501
 502 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL)                     \
 503   do {                                                                  \
 504     const char *xname = NAME;                                           \
 505     if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF)             \
 506       xname = IDENTIFIER_POINTER (DECL_NAME (DECL));                    \
 507     if (! DECL_WEAK (DECL)                                              \
 508         && ((TREE_STATIC (DECL)                                         \
 509              && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))           \
 510             || DECL_INITIAL (DECL)))                                    \
 511         machopic_define_symbol (DECL_RTL (DECL));                       \
 512     if ((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     ASM_OUTPUT_LABEL (FILE, xname);                                     \
 517   } while (0)
 518
 519 #define ASM_DECLARE_CONSTANT_NAME(FILE, NAME, EXP, SIZE)        \
 520   do {                                                          \
 521     ASM_OUTPUT_LABEL (FILE, NAME);                              \
 522     /* Darwin doesn't support zero-size objects, so give them a \
 523        byte.  */                                                \
 524     if ((SIZE) == 0)                                            \
 525       assemble_zeros (1);                                       \
 526   } while (0)
 527
 528 /* Wrap new method names in quotes so the assembler doesn't gag.
 529    Make Objective-C internal symbols local.  */
 530
 531 #undef  ASM_OUTPUT_LABELREF
 532 #define ASM_OUTPUT_LABELREF(FILE,NAME)                                       \
 533   do {                                                                       \
 534        const char *xname = (NAME);                                           \
 535        if (! strcmp (xname, "<pic base>"))                                   \
 536          machopic_output_function_base_name(FILE);                           \
 537        else if (xname[0] == '&' || xname[0] == '*')                          \
 538          {                                                                   \
 539            int len = strlen (xname);                                         \
 540            if (len > 6 && !strcmp ("$stub", xname + len - 5))                \
 541              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 542            else if (len > 7 && !strcmp ("$stub\"", xname + len - 6))         \
 543              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 544            else if (len > 14 && !strcmp ("$non_lazy_ptr", xname + len - 13)) \
 545              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 546            else if (len > 15 && !strcmp ("$non_lazy_ptr\"", xname + len - 14)) \
 547              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 548            if (xname[1] != '"' && name_needs_quotes (&xname[1]))             \
 549              fprintf (FILE, "\"%s\"", &xname[1]);                            \
 550            else                                                              \
 551              fputs (&xname[1], FILE);                                        \
 552          }                                                                   \
 553        else if (xname[0] == '+' || xname[0] == '-')                          \
 554          fprintf (FILE, "\"%s\"", xname);                                    \
 555        else if (!strncmp (xname, "_OBJC_", 6))                               \
 556          fprintf (FILE, "L%s", xname);                                       \
 557        else if (!strncmp (xname, ".objc_class_name_", 17))                   \
 558          fprintf (FILE, "%s", xname);                                        \
 559        else if (xname[0] != '"' && name_needs_quotes (xname))                \
 560          fprintf (FILE, "\"%s\"", xname);                                    \
 561        else                                                                  \
 562          asm_fprintf (FILE, "%U%s", xname);                                  \
 563   } while (0)
 564
 565 /* Output before executable code.  */
 566 #undef TEXT_SECTION_ASM_OP
 567 #define TEXT_SECTION_ASM_OP "\t.text"
 568
 569 /* Output before writable data.  */
 570
 571 #undef DATA_SECTION_ASM_OP
 572 #define DATA_SECTION_ASM_OP "\t.data"
 573
 574 #undef  ALIGN_ASM_OP
 575 #define ALIGN_ASM_OP            ".align"
 576
 577 #undef  ASM_OUTPUT_ALIGN
 578 #define ASM_OUTPUT_ALIGN(FILE,LOG)      \
 579   if ((LOG) != 0)                       \
 580     fprintf (FILE, "\t%s %d\n", ALIGN_ASM_OP, (LOG))
 581
 582 /* Ensure correct alignment of bss data.  */
 583
 584 #undef  ASM_OUTPUT_ALIGNED_DECL_LOCAL
 585 #define ASM_OUTPUT_ALIGNED_DECL_LOCAL(FILE, DECL, NAME, SIZE, ALIGN)    \
 586   do {                                                                  \
 587     unsigned HOST_WIDE_INT _new_size = SIZE;                            \
 588     fputs (".lcomm ", (FILE));                                          \
 589     assemble_name ((FILE), (NAME));                                     \
 590     if (_new_size == 0) _new_size = 1;                                  \
 591     fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED",%u\n", _new_size, \
 592              floor_log2 ((ALIGN) / BITS_PER_UNIT));                     \
 593     if ((DECL) && ((TREE_STATIC (DECL)                                  \
 594          && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))               \
 595         || DECL_INITIAL (DECL)))                                        \
 596       {                                                                 \
 597         (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false); \
 598         machopic_define_symbol (DECL_RTL (DECL));                       \
 599       }                                                                 \
 600   } while (0)
 601
 602 /* The maximum alignment which the object file format can support.
 603    For Mach-O, this is 2^15.  */
 604
 605 #undef  MAX_OFILE_ALIGNMENT
 606 #define MAX_OFILE_ALIGNMENT 0x8000
 607
 608 /* Create new Mach-O sections.  */
 609
 610 #undef  SECTION_FUNCTION
 611 #define SECTION_FUNCTION(FUNCTION, SECTION, DIRECTIVE, OBJC)            \
 612 extern void FUNCTION (void);                                            \
 613 void                                                                    \
 614 FUNCTION (void)                                                         \
 615 {                                                                       \
 616   if (in_section != SECTION)                                            \
 617     {                                                                   \
 618       if (OBJC)                                                         \
 619         objc_section_init ();                                           \
 620       if (asm_out_file)                                                 \
 621         fputs ("\t" DIRECTIVE "\n", asm_out_file);                      \
 622       in_section = SECTION;                                             \
 623       if ((SECTION == in_text_coal)                                     \
 624           || (SECTION == in_text_unlikely)                              \
 625           || (SECTION == in_text_unlikely_coal))                        \
 626         last_text_section = SECTION;                                    \
 627     }                                                                   \
 628 }                                                                       \
 629
 630 /* Darwin uses many types of special sections.  */
 631
 632 #undef  EXTRA_SECTIONS
 633 #define EXTRA_SECTIONS                                                  \
 634   in_text_coal, in_text_unlikely, in_text_unlikely_coal,                \
 635   in_const, in_const_data, in_cstring, in_literal4, in_literal8,        \
 636   in_const_coal, in_const_data_coal, in_data_coal,                      \
 637   in_constructor, in_destructor, in_mod_init, in_mod_term,              \
 638   in_objc_class, in_objc_meta_class, in_objc_category,                  \
 639   in_objc_class_vars, in_objc_instance_vars,                            \
 640   in_objc_cls_meth, in_objc_inst_meth,                                  \
 641   in_objc_cat_cls_meth, in_objc_cat_inst_meth,                          \
 642   in_objc_selector_refs,                                                \
 643   in_objc_selector_fixup,                                               \
 644   in_objc_symbols, in_objc_module_info,                                 \
 645   in_objc_protocol, in_objc_string_object,                              \
 646   in_objc_constant_string_object,                                       \
 647   in_objc_image_info,                                                   \
 648   in_objc_class_names, in_objc_meth_var_names,                          \
 649   in_objc_meth_var_types, in_objc_cls_refs,                             \
 650   in_machopic_nl_symbol_ptr,                                            \
 651   in_machopic_lazy_symbol_ptr,                                          \
 652   in_machopic_symbol_stub,                                              \
 653   in_machopic_symbol_stub1,                                             \
 654   in_machopic_picsymbol_stub,                                           \
 655   in_machopic_picsymbol_stub1,                                          \
 656   in_darwin_exception, in_darwin_eh_frame,                              \
 657   num_sections
 658
 659 #undef  EXTRA_SECTION_FUNCTIONS
 660 #define EXTRA_SECTION_FUNCTIONS                                 \
 661 static void objc_section_init (void);                           \
 662 SECTION_FUNCTION (text_coal_section,                            \
 663                   in_text_coal,                                 \
 664                   ".section __TEXT,__textcoal_nt,coalesced,"    \
 665                     "pure_instructions", 0)                     \
 666 SECTION_FUNCTION (text_unlikely_coal_section,                   \
 667                   in_text_unlikely_coal,                        \
 668                   ".section __TEXT,__text_unlikely_coal,"       \
 669                     "coalesced,pure_instructions", 0)           \
 670 SECTION_FUNCTION (const_section,                                \
 671                   in_const,                                     \
 672                   ".const", 0)                                  \
 673 SECTION_FUNCTION (const_coal_section,                           \
 674                   in_const_coal,                                \
 675                   ".section __TEXT,__const_coal,coalesced", 0)  \
 676 SECTION_FUNCTION (const_data_section,                           \
 677                   in_const_data,                                \
 678                   ".const_data", 0)                             \
 679 SECTION_FUNCTION (const_data_coal_section,                      \
 680                   in_const_data_coal,                           \
 681                   ".section __DATA,__const_coal,coalesced", 0)  \
 682 SECTION_FUNCTION (data_coal_section,                            \
 683                   in_data_coal,                                 \
 684                   ".section __DATA,__datacoal_nt,coalesced", 0) \
 685 SECTION_FUNCTION (cstring_section,                              \
 686                   in_cstring,                                   \
 687                   ".cstring", 0)                                \
 688 SECTION_FUNCTION (literal4_section,                             \
 689                   in_literal4,                                  \
 690                   ".literal4", 0)                               \
 691 SECTION_FUNCTION (literal8_section,                             \
 692                   in_literal8,                                  \
 693                   ".literal8", 0)                               \
 694 SECTION_FUNCTION (constructor_section,                          \
 695                   in_constructor,                               \
 696                   ".constructor", 0)                            \
 697 SECTION_FUNCTION (mod_init_section,                             \
 698                   in_mod_init,                                  \
 699                   ".mod_init_func", 0)                          \
 700 SECTION_FUNCTION (mod_term_section,                             \
 701                   in_mod_term,                                  \
 702                   ".mod_term_func", 0)                          \
 703 SECTION_FUNCTION (destructor_section,                           \
 704                   in_destructor,                                \
 705                   ".destructor", 0)                             \
 706 SECTION_FUNCTION (objc_class_section,                           \
 707                   in_objc_class,                                \
 708                   ".objc_class", 1)                             \
 709 SECTION_FUNCTION (objc_meta_class_section,                      \
 710                   in_objc_meta_class,                           \
 711                   ".objc_meta_class", 1)                        \
 712 SECTION_FUNCTION (objc_category_section,                        \
 713                   in_objc_category,                             \
 714                 ".objc_category", 1)                            \
 715 SECTION_FUNCTION (objc_class_vars_section,                      \
 716                   in_objc_class_vars,                           \
 717                   ".objc_class_vars", 1)                        \
 718 SECTION_FUNCTION (objc_instance_vars_section,                   \
 719                   in_objc_instance_vars,                        \
 720                   ".objc_instance_vars", 1)                     \
 721 SECTION_FUNCTION (objc_cls_meth_section,                        \
 722                   in_objc_cls_meth,                             \
 723                   ".objc_cls_meth", 1)                          \
 724 SECTION_FUNCTION (objc_inst_meth_section,                       \
 725                   in_objc_inst_meth,                            \
 726                   ".objc_inst_meth", 1)                         \
 727 SECTION_FUNCTION (objc_cat_cls_meth_section,                    \
 728                   in_objc_cat_cls_meth,                         \
 729                   ".objc_cat_cls_meth", 1)                      \
 730 SECTION_FUNCTION (objc_cat_inst_meth_section,                   \
 731                   in_objc_cat_inst_meth,                        \
 732                   ".objc_cat_inst_meth", 1)                     \
 733 SECTION_FUNCTION (objc_selector_refs_section,                   \
 734                   in_objc_selector_refs,                        \
 735                   ".objc_message_refs", 1)                      \
 736 SECTION_FUNCTION (objc_selector_fixup_section,                               \
 737                   in_objc_selector_fixup,                                    \
 738                   ".section __OBJC, __sel_fixup, regular, no_dead_strip", 1) \
 739 SECTION_FUNCTION (objc_symbols_section,                                 \
 740                   in_objc_symbols,                                      \
 741                   ".objc_symbols", 1)                                   \
 742 SECTION_FUNCTION (objc_module_info_section,                             \
 743                   in_objc_module_info,                                  \
 744                   ".objc_module_info", 1)                               \
 745 SECTION_FUNCTION (objc_protocol_section,                                \
 746                   in_objc_protocol,                                     \
 747                   ".objc_protocol", 1)                                  \
 748 SECTION_FUNCTION (objc_string_object_section,                           \
 749                   in_objc_string_object,                                \
 750                   ".objc_string_object", 1)                             \
 751 SECTION_FUNCTION (objc_constant_string_object_section,                  \
 752                   in_objc_constant_string_object,                       \
 753                   ".section __OBJC, __cstring_object, regular, "        \
 754                     "no_dead_strip", 1)                                 \
 755 /* Fix-and-Continue image marker.  */                                   \
 756 SECTION_FUNCTION (objc_image_info_section,                              \
 757                   in_objc_image_info,                                   \
 758                   ".section __OBJC, __image_info, regular, "            \
 759                     "no_dead_strip", 1)                                 \
 760 SECTION_FUNCTION (objc_class_names_section,                             \
 761                 in_objc_class_names,                                    \
 762                 ".objc_class_names", 1)                                 \
 763 SECTION_FUNCTION (objc_meth_var_names_section,                          \
 764                 in_objc_meth_var_names,                                 \
 765                 ".objc_meth_var_names", 1)                              \
 766 SECTION_FUNCTION (objc_meth_var_types_section,                          \
 767                 in_objc_meth_var_types,                                 \
 768                 ".objc_meth_var_types", 1)                              \
 769 SECTION_FUNCTION (objc_cls_refs_section,                                \
 770                 in_objc_cls_refs,                                       \
 771                 ".objc_cls_refs", 1)                                    \
 772 \
 773 SECTION_FUNCTION (machopic_lazy_symbol_ptr_section,                     \
 774                 in_machopic_lazy_symbol_ptr,                            \
 775                 ".lazy_symbol_pointer", 0)                              \
 776 SECTION_FUNCTION (machopic_nl_symbol_ptr_section,                       \
 777                 in_machopic_nl_symbol_ptr,                              \
 778                 ".non_lazy_symbol_pointer", 0)                          \
 779 SECTION_FUNCTION (machopic_symbol_stub_section,                         \
 780                 in_machopic_symbol_stub,                                \
 781                 ".symbol_stub", 0)                                      \
 782 SECTION_FUNCTION (machopic_symbol_stub1_section,                        \
 783                 in_machopic_symbol_stub1,                               \
 784                 ".section __TEXT,__symbol_stub1,symbol_stubs,"          \
 785                   "pure_instructions,16", 0)                            \
 786 SECTION_FUNCTION (machopic_picsymbol_stub_section,                      \
 787                 in_machopic_picsymbol_stub,                             \
 788                 ".picsymbol_stub", 0)                                   \
 789 SECTION_FUNCTION (machopic_picsymbol_stub1_section,                     \
 790                 in_machopic_picsymbol_stub1,                            \
 791                 ".section __TEXT,__picsymbolstub1,symbol_stubs,"        \
 792                   "pure_instructions,32", 0)                            \
 793 SECTION_FUNCTION (darwin_exception_section,                             \
 794                 in_darwin_exception,                                    \
 795                 ".section __DATA,__gcc_except_tab", 0)                  \
 796 SECTION_FUNCTION (darwin_eh_frame_section,                              \
 797                 in_darwin_eh_frame,                                     \
 798                 ".section " EH_FRAME_SECTION_NAME ",__eh_frame"         \
 799                   EH_FRAME_SECTION_ATTR, 0)                             \
 800 \
 801 static void                                     \
 802 objc_section_init (void)                        \
 803 {                                               \
 804   static int been_here = 0;                     \
 805                                                 \
 806   if (been_here == 0)                           \
 807     {                                           \
 808       been_here = 1;                            \
 809           /* written, cold -> hot */            \
 810       objc_cat_cls_meth_section ();             \
 811       objc_cat_inst_meth_section ();            \
 812       objc_string_object_section ();            \
 813       objc_constant_string_object_section ();   \
 814       objc_selector_refs_section ();            \
 815       objc_selector_fixup_section ();           \
 816       objc_cls_refs_section ();                 \
 817       objc_class_section ();                    \
 818       objc_meta_class_section ();               \
 819           /* shared, hot -> cold */             \
 820       objc_cls_meth_section ();                 \
 821       objc_inst_meth_section ();                \
 822       objc_protocol_section ();                 \
 823       objc_class_names_section ();              \
 824       objc_meth_var_types_section ();           \
 825       objc_meth_var_names_section ();           \
 826       objc_category_section ();                 \
 827       objc_class_vars_section ();               \
 828       objc_instance_vars_section ();            \
 829       objc_module_info_section ();              \
 830       objc_symbols_section ();                  \
 831     }                                           \
 832 }
 833
 834 #define READONLY_DATA_SECTION const_section
 835
 836 #undef  TARGET_ASM_SELECT_SECTION
 837 #define TARGET_ASM_SELECT_SECTION machopic_select_section
 838 #define USE_SELECT_SECTION_FOR_FUNCTIONS
 839
 840 #undef  TARGET_ASM_SELECT_RTX_SECTION
 841 #define TARGET_ASM_SELECT_RTX_SECTION machopic_select_rtx_section
 842 #undef  TARGET_ASM_UNIQUE_SECTION
 843 #define TARGET_ASM_UNIQUE_SECTION darwin_unique_section
 844 #undef  TARGET_ASM_FUNCTION_RODATA_SECTION
 845 #define TARGET_ASM_FUNCTION_RODATA_SECTION default_no_function_rodata_section
 846
 847
 848 #define ASM_DECLARE_UNRESOLVED_REFERENCE(FILE,NAME)                     \
 849     do {                                                                \
 850          if (FILE) {                                                    \
 851            if (MACHOPIC_INDIRECT)                                       \
 852              fprintf (FILE, "\t.lazy_reference ");                      \
 853            else                                                         \
 854              fprintf (FILE, "\t.reference ");                           \
 855            assemble_name (FILE, NAME);                                  \
 856            fprintf (FILE, "\n");                                        \
 857          }                                                              \
 858        } while (0)
 859
 860 #define ASM_DECLARE_CLASS_REFERENCE(FILE,NAME)                          \
 861     do {                                                                \
 862          if (FILE) {                                                    \
 863            fprintf (FILE, "\t");                                        \
 864            assemble_name (FILE, NAME);                                  \
 865            fprintf (FILE, "=0\n");                                      \
 866            (*targetm.asm_out.globalize_label) (FILE, NAME);             \
 867          }                                                              \
 868        } while (0)
 869
 870 /* Globalizing directive for a label.  */
 871 #define GLOBAL_ASM_OP ".globl "
 872 #define TARGET_ASM_GLOBALIZE_LABEL darwin_globalize_label
 873
 874 /* Emit an assembler directive to set visibility for a symbol.  Used
 875    to support visibility attribute and Darwin's private extern
 876    feature.  */
 877 #undef TARGET_ASM_ASSEMBLE_VISIBILITY
 878 #define TARGET_ASM_ASSEMBLE_VISIBILITY darwin_assemble_visibility
 879
 880 /* Extra attributes for Darwin.  */
 881 #define SUBTARGET_ATTRIBUTE_TABLE                                            \
 882   /* { name, min_len, max_len, decl_req, type_req, fn_type_req, handler } */ \
 883   { "weak_import", 0, 0, true, false, false,                                 \
 884     darwin_handle_weak_import_attribute }
 885
 886 #undef ASM_GENERATE_INTERNAL_LABEL
 887 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM)   \
 888   sprintf (LABEL, "*%s%ld", PREFIX, (long)(NUM))
 889
 890 #undef TARGET_ASM_MARK_DECL_PRESERVED
 891 #define TARGET_ASM_MARK_DECL_PRESERVED darwin_mark_decl_preserved
 892
 893 /* Set on a symbol with SYMBOL_FLAG_FUNCTION or
 894    MACHO_SYMBOL_FLAG_VARIABLE to indicate that the function or
 895    variable has been defined in this translation unit.  */
 896
 897 #define MACHO_SYMBOL_FLAG_VARIABLE (SYMBOL_FLAG_MACH_DEP)
 898 #define MACHO_SYMBOL_FLAG_DEFINED ((SYMBOL_FLAG_MACH_DEP) << 1)
 899
 900 /* Set on a symbol to indicate when fix-and-continue style code
 901    generation is being used and the symbol refers to a static symbol
 902    that should be rebound from new instances of a translation unit to
 903    the original instance of the data.  */
 904
 905 #define MACHO_SYMBOL_STATIC ((SYMBOL_FLAG_MACH_DEP) << 2)
 906
 907 /* Symbolic names for various things we might know about a symbol.  */
 908
 909 enum machopic_addr_class {
 910   MACHOPIC_UNDEFINED,
 911   MACHOPIC_DEFINED_DATA,
 912   MACHOPIC_UNDEFINED_DATA,
 913   MACHOPIC_DEFINED_FUNCTION,
 914   MACHOPIC_UNDEFINED_FUNCTION
 915 };
 916
 917 /* Macros defining the various PIC cases.  */
 918
 919 #define MACHO_DYNAMIC_NO_PIC_P  (TARGET_DYNAMIC_NO_PIC)
 920 #define MACHOPIC_INDIRECT       (flag_pic || MACHO_DYNAMIC_NO_PIC_P)
 921 #define MACHOPIC_JUST_INDIRECT  (flag_pic == 1 || MACHO_DYNAMIC_NO_PIC_P)
 922 #define MACHOPIC_PURE           (flag_pic == 2 && ! MACHO_DYNAMIC_NO_PIC_P)
 923
 924 #undef TARGET_ENCODE_SECTION_INFO
 925 #define TARGET_ENCODE_SECTION_INFO  darwin_encode_section_info
 926 #undef TARGET_STRIP_NAME_ENCODING
 927 #define TARGET_STRIP_NAME_ENCODING  default_strip_name_encoding
 928
 929 #define GEN_BINDER_NAME_FOR_STUB(BUF,STUB,STUB_LENGTH)          \
 930   do {                                                          \
 931     const char *const stub_ = (STUB);                           \
 932     char *buffer_ = (BUF);                                      \
 933     strcpy (buffer_, stub_);                                    \
 934     if (stub_[0] == '"')                                        \
 935       {                                                         \
 936         strcpy (buffer_ + (STUB_LENGTH) - 1, "_binder\"");      \
 937       }                                                         \
 938     else                                                        \
 939       {                                                         \
 940         strcpy (buffer_ + (STUB_LENGTH), "_binder");            \
 941       }                                                         \
 942   } while (0)
 943
 944 #define GEN_SYMBOL_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH)    \
 945   do {                                                          \
 946     const char *const symbol_ = (SYMBOL);                       \
 947     char *buffer_ = (BUF);                                      \
 948     if (name_needs_quotes (symbol_) && symbol_[0] != '"')       \
 949       {                                                         \
 950           sprintf (buffer_, "\"%s\"", symbol_);                 \
 951       }                                                         \
 952     else                                                        \
 953       {                                                         \
 954         strcpy (buffer_, symbol_);                              \
 955       }                                                         \
 956   } while (0)
 957
 958 /* Given a symbol name string, create the lazy pointer version
 959    of the symbol name.  */
 960
 961 #define GEN_LAZY_PTR_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH)  \
 962   do {                                                          \
 963     const char *symbol_ = (SYMBOL);                             \
 964     char *buffer_ = (BUF);                                      \
 965     if (symbol_[0] == '"')                                      \
 966       {                                                         \
 967         strcpy (buffer_, "\"L");                                \
 968         strcpy (buffer_ + 2, symbol_ + 1);                      \
 969         strcpy (buffer_ + (SYMBOL_LENGTH), "$lazy_ptr\"");      \
 970       }                                                         \
 971     else if (name_needs_quotes (symbol_))                       \
 972       {                                                         \
 973         strcpy (buffer_, "\"L");                                \
 974         strcpy (buffer_ + 2, symbol_);                          \
 975         strcpy (buffer_ + (SYMBOL_LENGTH) + 2, "$lazy_ptr\"");  \
 976       }                                                         \
 977     else                                                        \
 978       {                                                         \
 979         strcpy (buffer_, "L");                                  \
 980         strcpy (buffer_ + 1, symbol_);                          \
 981         strcpy (buffer_ + (SYMBOL_LENGTH) + 1, "$lazy_ptr");    \
 982       }                                                         \
 983   } while (0)
 984
 985 #define TARGET_ASM_EXCEPTION_SECTION darwin_exception_section
 986
 987 #define TARGET_ASM_EH_FRAME_SECTION darwin_eh_frame_section
 988
 989 #define EH_FRAME_SECTION_NAME   "__TEXT"
 990 #define EH_FRAME_SECTION_ATTR ",coalesced,no_toc+strip_static_syms+live_support"
 991
 992 /* Java runtime class list.  */
 993 #define JCR_SECTION_NAME "__DATA,jcr,regular,no_dead_strip"
 994
 995 #undef ASM_PREFERRED_EH_DATA_FORMAT
 996 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL)  \
 997   (((CODE) == 2 && (GLOBAL) == 1) \
 998    ? (DW_EH_PE_pcrel | DW_EH_PE_indirect | DW_EH_PE_sdata4) : \
 999      ((CODE) == 1 || (GLOBAL) == 0) ? DW_EH_PE_pcrel : DW_EH_PE_absptr)
1000
1001 #define ASM_OUTPUT_DWARF_DELTA(FILE,SIZE,LABEL1,LABEL2)  \
1002   darwin_asm_output_dwarf_delta (FILE, SIZE, LABEL1, LABEL2)
1003
1004 #define ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX(ASM_OUT_FILE, ENCODING, SIZE, ADDR, DONE)     \
1005       if (ENCODING == ASM_PREFERRED_EH_DATA_FORMAT (2, 1)) {                            \
1006         darwin_non_lazy_pcrel (ASM_OUT_FILE, ADDR);                                     \
1007         goto DONE;                                                                      \
1008       }
1009
1010 /* Experimentally, putting jump tables in text is faster on SPEC.
1011    Also this is needed for correctness for coalesced functions.  */
1012
1013 #ifndef JUMP_TABLES_IN_TEXT_SECTION
1014 #define JUMP_TABLES_IN_TEXT_SECTION 1
1015 #endif
1016
1017 #define TARGET_TERMINATE_DW2_EH_FRAME_INFO false
1018
1019 #undef TARGET_ASM_NAMED_SECTION
1020 #define TARGET_ASM_NAMED_SECTION darwin_asm_named_section
1021
1022 #define DARWIN_REGISTER_TARGET_PRAGMAS()                        \
1023   do {                                                          \
1024     c_register_pragma (0, "mark", darwin_pragma_ignore);        \
1025     c_register_pragma (0, "options", darwin_pragma_options);    \
1026     c_register_pragma (0, "segment", darwin_pragma_ignore);     \
1027     c_register_pragma (0, "unused", darwin_pragma_unused);      \
1028   } while (0)
1029
1030 #undef ASM_APP_ON
1031 #define ASM_APP_ON ""
1032 #undef ASM_APP_OFF
1033 #define ASM_APP_OFF ""
1034
1035 void darwin_register_frameworks (const char *, const char *, int);
1036 void darwin_register_objc_includes (const char *, const char *, int);
1037 #define TARGET_EXTRA_PRE_INCLUDES darwin_register_objc_includes
1038 #define TARGET_EXTRA_INCLUDES darwin_register_frameworks
1039
1040 void add_framework_path (char *);
1041 #define TARGET_OPTF add_framework_path
1042
1043 #define TARGET_POSIX_IO
1044
1045 /* All new versions of Darwin have C99 functions.  */
1046 #define TARGET_C99_FUNCTIONS 1
1047
1048 #define WINT_TYPE "int"
1049
1050 #endif /* CONFIG_DARWIN_H */