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, 2006, 2007, 2008, 2009
   4    Free Software Foundation, Inc.
   5    Contributed by Apple Computer Inc.
   6
   7 This file is part of GCC.
   8
   9 GCC is free software; you can redistribute it and/or modify
  10 it under the terms of the GNU General Public License as published by
  11 the Free Software Foundation; either version 3, or (at your option)
  12 any later version.
  13
  14 GCC is distributed in the hope that it will be useful,
  15 but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 GNU General Public License for more details.
  18
  19 Under Section 7 of GPL version 3, you are granted additional
  20 permissions described in the GCC Runtime Library Exception, version
  21 3.1, as published by the Free Software Foundation.
  22
  23 You should have received a copy of the GNU General Public License and
  24 a copy of the GCC Runtime Library Exception along with this program;
  25 see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  26 <http://www.gnu.org/licenses/>.  */
  27
  28 #ifndef CONFIG_DARWIN_H
  29 #define CONFIG_DARWIN_H
  30
  31 /* The definitions in this file are common to all processor types
  32    running Darwin, which is the kernel for Mac OS X.  Darwin is
  33    basically a BSD user layer laid over a Mach kernel, then evolved
  34    for many years (at NeXT) in parallel with other Unix systems.  So
  35    while the runtime is a somewhat idiosyncratic Mach-based thing,
  36    other definitions look like they would for a BSD variant.  */
  37
  38 /* Although NeXT ran on many different architectures, as of Jan 2001
  39    the only supported Darwin targets are PowerPC and x86.  */
  40
  41 /* One of Darwin's NeXT legacies is the Mach-O format, which is partly
  42    like a.out and partly like COFF, with additional features like
  43    multi-architecture binary support.  */
  44
  45 #define OBJECT_FORMAT_MACHO
  46
  47 /* Don't assume anything about the header files.  */
  48 #define NO_IMPLICIT_EXTERN_C
  49
  50 /* Suppress g++ attempt to link in the math library automatically. */
  51 #define MATH_LIBRARY ""
  52
  53 /* We have atexit.  */
  54
  55 #define HAVE_ATEXIT
  56
  57 /* Define an empty body for the function do_global_dtors() in libgcc2.c.  */
  58
  59 #define DO_GLOBAL_DTORS_BODY
  60
  61 /* The string value for __SIZE_TYPE__.  */
  62
  63 #ifndef SIZE_TYPE
  64 #define SIZE_TYPE "long unsigned int"
  65 #endif
  66
  67 /* Type used for ptrdiff_t, as a string used in a declaration.  */
  68
  69 #undef  PTRDIFF_TYPE
  70 #define PTRDIFF_TYPE "int"
  71
  72 /* wchar_t is int.  */
  73
  74 #undef  WCHAR_TYPE
  75 #define WCHAR_TYPE "int"
  76 #undef  WCHAR_TYPE_SIZE
  77 #define WCHAR_TYPE_SIZE 32
  78
  79 #define INT8_TYPE "signed char"
  80 #define INT16_TYPE "short int"
  81 #define INT32_TYPE "int"
  82 #define INT64_TYPE "long long int"
  83 #define UINT8_TYPE "unsigned char"
  84 #define UINT16_TYPE "short unsigned int"
  85 #define UINT32_TYPE "unsigned int"
  86 #define UINT64_TYPE "long long unsigned int"
  87
  88 #define INT_LEAST8_TYPE "signed char"
  89 #define INT_LEAST16_TYPE "short int"
  90 #define INT_LEAST32_TYPE "int"
  91 #define INT_LEAST64_TYPE "long long int"
  92 #define UINT_LEAST8_TYPE "unsigned char"
  93 #define UINT_LEAST16_TYPE "short unsigned int"
  94 #define UINT_LEAST32_TYPE "unsigned int"
  95 #define UINT_LEAST64_TYPE "long long unsigned int"
  96
  97 #define INT_FAST8_TYPE "signed char"
  98 #define INT_FAST16_TYPE "short int"
  99 #define INT_FAST32_TYPE "int"
 100 #define INT_FAST64_TYPE "long long int"
 101 #define UINT_FAST8_TYPE "unsigned char"
 102 #define UINT_FAST16_TYPE "short unsigned int"
 103 #define UINT_FAST32_TYPE "unsigned int"
 104 #define UINT_FAST64_TYPE "long long unsigned int"
 105
 106 #define INTPTR_TYPE "long int"
 107 #define UINTPTR_TYPE "long unsigned int"
 108
 109 #define SIG_ATOMIC_TYPE "int"
 110
 111 /* Default to using the NeXT-style runtime, since that's what is
 112    pre-installed on Darwin systems.  */
 113
 114 #define NEXT_OBJC_RUNTIME
 115
 116 /* Don't default to pcc-struct-return, because gcc is the only compiler, and
 117    we want to retain compatibility with older gcc versions.  */
 118
 119 #undef  DEFAULT_PCC_STRUCT_RETURN
 120 #define DEFAULT_PCC_STRUCT_RETURN 0
 121
 122 /* True if pragma ms_struct is in effect.  */
 123 extern GTY(()) int darwin_ms_struct;
 124
 125 /* This table intercepts weirdo options whose names would interfere
 126    with normal driver conventions, and either translates them into
 127    standardly-named options, or adds a 'Z' so that they can get to
 128    specs processing without interference.
 129
 130    Do not expand a linker option to "-Xlinker -<option>", since that
 131    forfeits the ability to control via spec strings later.  However,
 132    as a special exception, do this translation with -filelist, because
 133    otherwise the driver will think there are no input files and quit.
 134    (The alternative would be to hack the driver to recognize -filelist
 135    specially, but it's simpler to use the translation table.)
 136
 137    Note that an option name with a prefix that matches another option
 138    name, that also takes an argument, needs to be modified so the
 139    prefix is different, otherwise a '*' after the shorter option will
 140    match with the longer one.
 141
 142    The SUBTARGET_OPTION_TRANSLATE_TABLE macro, which _must_ be defined
 143    in gcc/config/{i386,rs6000}/darwin.h, should contain any additional
 144    command-line option translations specific to the particular target
 145    architecture.  */
 146
 147 #define TARGET_OPTION_TRANSLATE_TABLE \
 148   { "-all_load", "-Zall_load" },  \
 149   { "-allowable_client", "-Zallowable_client" },  \
 150   { "-arch_errors_fatal", "-Zarch_errors_fatal" },  \
 151   { "-bind_at_load", "-Zbind_at_load" },  \
 152   { "-bundle", "-Zbundle" },  \
 153   { "-bundle_loader", "-Zbundle_loader" },  \
 154   { "-weak_reference_mismatches", "-Zweak_reference_mismatches" },  \
 155   { "-dead_strip", "-Zdead_strip" }, \
 156   { "-no_dead_strip_inits_and_terms", "-Zno_dead_strip_inits_and_terms" }, \
 157   { "-dependency-file", "-MF" }, \
 158   { "-dylib_file", "-Zdylib_file" }, \
 159   { "-dynamic", "-Zdynamic" },  \
 160   { "-dynamiclib", "-Zdynamiclib" },  \
 161   { "-exported_symbols_list", "-Zexported_symbols_list" },  \
 162   { "-gfull", "-g -fno-eliminate-unused-debug-symbols" }, \
 163   { "-gused", "-g -feliminate-unused-debug-symbols" }, \
 164   { "-segaddr", "-Zsegaddr" }, \
 165   { "-segs_read_only_addr", "-Zsegs_read_only_addr" }, \
 166   { "-segs_read_write_addr", "-Zsegs_read_write_addr" }, \
 167   { "-seg_addr_table", "-Zseg_addr_table" }, \
 168   { "-seg_addr_table_filename", "-Zfn_seg_addr_table_filename" }, \
 169   { "-umbrella", "-Zumbrella" }, \
 170   { "-fapple-kext", "-fapple-kext -static -Wa,-static" }, \
 171   { "-filelist", "-Xlinker -filelist -Xlinker" },  \
 172   { "-findirect-virtual-calls", "-fapple-kext" }, \
 173   { "-flat_namespace", "-Zflat_namespace" },  \
 174   { "-force_cpusubtype_ALL", "-Zforce_cpusubtype_ALL" },  \
 175   { "-force_flat_namespace", "-Zforce_flat_namespace" },  \
 176   { "-framework", "-Xlinker -framework -Xlinker" },  \
 177   { "-fterminated-vtables", "-fapple-kext" }, \
 178   { "-image_base", "-Zimage_base" },  \
 179   { "-init", "-Zinit" },  \
 180   { "-install_name", "-Zinstall_name" },  \
 181   { "-mkernel", "-mkernel -static -Wa,-static" }, \
 182   { "-multiply_defined_unused", "-Zmultiplydefinedunused" },  \
 183   { "-multiply_defined", "-Zmultiply_defined" },  \
 184   { "-multi_module", "-Zmulti_module" },  \
 185   { "-static", "-static -Wa,-static" },  \
 186   { "-shared", "-Zdynamiclib" }, \
 187   { "-single_module", "-Zsingle_module" },  \
 188   { "-unexported_symbols_list", "-Zunexported_symbols_list" }, \
 189   SUBTARGET_OPTION_TRANSLATE_TABLE
 190
 191 #define SUBSUBTARGET_OVERRIDE_OPTIONS                                   \
 192   do {                                                                  \
 193     darwin_override_options ();                                         \
 194   } while (0)
 195
 196 /* These compiler options take n arguments.  */
 197
 198 #undef  WORD_SWITCH_TAKES_ARG
 199 #define WORD_SWITCH_TAKES_ARG(STR)              \
 200   (DEFAULT_WORD_SWITCH_TAKES_ARG (STR) ? 1 :    \
 201    !strcmp (STR, "Zallowable_client") ? 1 :     \
 202    !strcmp (STR, "arch") ? 1 :                  \
 203    !strcmp (STR, "arch_only") ? 1 :             \
 204    !strcmp (STR, "Zbundle_loader") ? 1 :        \
 205    !strcmp (STR, "client_name") ? 1 :           \
 206    !strcmp (STR, "compatibility_version") ? 1 : \
 207    !strcmp (STR, "current_version") ? 1 :       \
 208    !strcmp (STR, "Zdylib_file") ? 1 :           \
 209    !strcmp (STR, "Zexported_symbols_list") ? 1 : \
 210    !strcmp (STR, "Zimage_base") ? 1 :           \
 211    !strcmp (STR, "Zinit") ? 1 :                 \
 212    !strcmp (STR, "Zinstall_name") ? 1 :         \
 213    !strcmp (STR, "Zmultiplydefinedunused") ? 1 : \
 214    !strcmp (STR, "Zmultiply_defined") ? 1 :     \
 215    !strcmp (STR, "precomp-trustfile") ? 1 :     \
 216    !strcmp (STR, "read_only_relocs") ? 1 :      \
 217    !strcmp (STR, "sectcreate") ? 3 :            \
 218    !strcmp (STR, "sectorder") ? 3 :             \
 219    !strcmp (STR, "Zsegaddr") ? 2 :              \
 220    !strcmp (STR, "Zsegs_read_only_addr") ? 1 :  \
 221    !strcmp (STR, "Zsegs_read_write_addr") ? 1 : \
 222    !strcmp (STR, "Zseg_addr_table") ? 1 :       \
 223    !strcmp (STR, "Zfn_seg_addr_table_filename") ? 1 :\
 224    !strcmp (STR, "seg1addr") ? 1 :              \
 225    !strcmp (STR, "segprot") ? 3 :               \
 226    !strcmp (STR, "sub_library") ? 1 :           \
 227    !strcmp (STR, "sub_umbrella") ? 1 :          \
 228    !strcmp (STR, "Zumbrella") ? 1 :             \
 229    !strcmp (STR, "undefined") ? 1 :             \
 230    !strcmp (STR, "Zunexported_symbols_list") ? 1 : \
 231    !strcmp (STR, "Zweak_reference_mismatches") ? 1 : \
 232    !strcmp (STR, "pagezero_size") ? 1 :         \
 233    !strcmp (STR, "segs_read_only_addr") ? 1 :   \
 234    !strcmp (STR, "segs_read_write_addr") ? 1 :  \
 235    !strcmp (STR, "sectalign") ? 3 :             \
 236    !strcmp (STR, "sectobjectsymbols") ? 2 :     \
 237    !strcmp (STR, "segcreate") ? 3 :             \
 238    !strcmp (STR, "dylinker_install_name") ? 1 : \
 239    0)
 240
 241 #define SUBTARGET_C_COMMON_OVERRIDE_OPTIONS do {                        \
 242     if (flag_mkernel || flag_apple_kext)                                \
 243       {                                                                 \
 244         if (flag_use_cxa_atexit == 2)                                   \
 245           flag_use_cxa_atexit = 0;                                      \
 246         /* kexts should always be built without the coalesced sections  \
 247            because the kernel loader doesn't grok such sections.  */    \
 248         flag_weak = 0;                                                  \
 249         /* No RTTI in kexts.  */                                        \
 250         flag_rtti = 0;                                                  \
 251       }                                                                 \
 252   } while (0)
 253
 254 /* Machine dependent cpp options.  Don't add more options here, add
 255    them to darwin_cpp_builtins in darwin-c.c.  */
 256
 257 #undef  CPP_SPEC
 258 #define CPP_SPEC "%{static:%{!dynamic:-D__STATIC__}}%{!static:-D__DYNAMIC__}" \
 259         " %{pthread:-D_REENTRANT}"
 260
 261 /* This is mostly a clone of the standard LINK_COMMAND_SPEC, plus
 262    precomp, libtool, and fat build additions.  Also we
 263    don't specify a second %G after %L because libSystem is
 264    self-contained and doesn't need to link against libgcc.a.  */
 265 /* In general, random Darwin linker flags should go into LINK_SPEC
 266    instead of LINK_COMMAND_SPEC.  The command spec is better for
 267    specifying the handling of options understood by generic Unix
 268    linkers, and for positional arguments like libraries.  */
 269 #define LINK_COMMAND_SPEC "\
 270 %{!fdump=*:%{!fsyntax-only:%{!c:%{!M:%{!MM:%{!E:%{!S:\
 271     %(linker) %l %X %{d} %{s} %{t} %{Z} %{u*} \
 272     %{A} %{e*} %{m} %{r} %{x} \
 273     %{o*}%{!o:-o a.out} \
 274     %{!A:%{!nostdlib:%{!nostartfiles:%S}}} \
 275     %{L*} %{fopenmp:%:include(libgomp.spec)%(link_gomp)}   \
 276     %(link_libgcc) %o %{fprofile-arcs|fprofile-generate*|coverage:-lgcov} \
 277     %{!nostdlib:%{!nodefaultlibs:%(link_ssp) %G %L}} \
 278     %{!A:%{!nostdlib:%{!nostartfiles:%E}}} %{T*} %{F*} }}}}}}}\n\
 279 %{!fdump=*:%{!fsyntax-only:%{!c:%{!M:%{!MM:%{!E:%{!S:\
 280     %{.c|.cc|.C|.cpp|.cp|.c++|.cxx|.CPP|.m|.mm: \
 281     %{gdwarf-2:%{!gstabs*:%{!g0: dsymutil %{o*:%*}%{!o:a.out}}}}}}}}}}}}"
 282
 283 #ifdef TARGET_SYSTEM_ROOT
 284 #define LINK_SYSROOT_SPEC \
 285   "%{isysroot*:-syslibroot %*;:-syslibroot " TARGET_SYSTEM_ROOT "}"
 286 #else
 287 #define LINK_SYSROOT_SPEC "%{isysroot*:-syslibroot %*}"
 288 #endif
 289
 290 /* Please keep the random linker options in alphabetical order (modulo
 291    'Z' and 'no' prefixes). Note that options taking arguments may appear
 292    multiple times on a command line with different arguments each time,
 293    so put a * after their names so all of them get passed.  */
 294 #define LINK_SPEC  \
 295   "%{static}%{!static:-dynamic} \
 296    %{fgnu-runtime:%:replace-outfile(-lobjc -lobjc-gnu)}\
 297    %{static|static-libgfortran:%:replace-outfile(-lgfortran libgfortran.a%s)}\
 298    %{!Zdynamiclib: \
 299      %{Zforce_cpusubtype_ALL:-arch %(darwin_arch) -force_cpusubtype_ALL} \
 300      %{!Zforce_cpusubtype_ALL:-arch %(darwin_subarch)} \
 301      %{Zbundle:-bundle} \
 302      %{Zbundle_loader*:-bundle_loader %*} \
 303      %{client_name*} \
 304      %{compatibility_version*:%e-compatibility_version only allowed with -dynamiclib\
 305 } \
 306      %{current_version*:%e-current_version only allowed with -dynamiclib} \
 307      %{Zforce_flat_namespace:-force_flat_namespace} \
 308      %{Zinstall_name*:%e-install_name only allowed with -dynamiclib} \
 309      %{keep_private_externs} \
 310      %{private_bundle} \
 311     } \
 312    %{Zdynamiclib: -dylib \
 313      %{Zbundle:%e-bundle not allowed with -dynamiclib} \
 314      %{Zbundle_loader*:%e-bundle_loader not allowed with -dynamiclib} \
 315      %{client_name*:%e-client_name not allowed with -dynamiclib} \
 316      %{compatibility_version*:-dylib_compatibility_version %*} \
 317      %{current_version*:-dylib_current_version %*} \
 318      %{Zforce_cpusubtype_ALL:-arch %(darwin_arch)} \
 319      %{!Zforce_cpusubtype_ALL: -arch %(darwin_subarch)} \
 320      %{Zforce_flat_namespace:%e-force_flat_namespace not allowed with -dynamiclib} \
 321      %{Zinstall_name*:-dylib_install_name %*} \
 322      %{keep_private_externs:%e-keep_private_externs not allowed with -dynamiclib} \
 323      %{private_bundle:%e-private_bundle not allowed with -dynamiclib} \
 324     } \
 325    %{Zall_load:-all_load} \
 326    %{Zallowable_client*:-allowable_client %*} \
 327    %{Zbind_at_load:-bind_at_load} \
 328    %{Zarch_errors_fatal:-arch_errors_fatal} \
 329    %{Zdead_strip:-dead_strip} \
 330    %{Zno_dead_strip_inits_and_terms:-no_dead_strip_inits_and_terms} \
 331    %{Zdylib_file*:-dylib_file %*} \
 332    %{Zdynamic:-dynamic}\
 333    %{Zexported_symbols_list*:-exported_symbols_list %*} \
 334    %{Zflat_namespace:-flat_namespace} \
 335    %{headerpad_max_install_names*} \
 336    %{Zimage_base*:-image_base %*} \
 337    %{Zinit*:-init %*} \
 338    %{!mmacosx-version-min=*:-macosx_version_min %(darwin_minversion)} \
 339    %{mmacosx-version-min=*:-macosx_version_min %*} \
 340    %{nomultidefs} \
 341    %{Zmulti_module:-multi_module} %{Zsingle_module:-single_module} \
 342    %{Zmultiply_defined*:-multiply_defined %*} \
 343    %{!Zmultiply_defined*:%{shared-libgcc: \
 344      %:version-compare(< 10.5 mmacosx-version-min= -multiply_defined) \
 345      %:version-compare(< 10.5 mmacosx-version-min= suppress)}} \
 346    %{Zmultiplydefinedunused*:-multiply_defined_unused %*} \
 347    %{fpie:-pie} \
 348    %{prebind} %{noprebind} %{nofixprebinding} %{prebind_all_twolevel_modules} \
 349    %{read_only_relocs} \
 350    %{sectcreate*} %{sectorder*} %{seg1addr*} %{segprot*} \
 351    %{Zsegaddr*:-segaddr %*} \
 352    %{Zsegs_read_only_addr*:-segs_read_only_addr %*} \
 353    %{Zsegs_read_write_addr*:-segs_read_write_addr %*} \
 354    %{Zseg_addr_table*: -seg_addr_table %*} \
 355    %{Zfn_seg_addr_table_filename*:-seg_addr_table_filename %*} \
 356    %{sub_library*} %{sub_umbrella*} \
 357    " LINK_SYSROOT_SPEC " \
 358    %{twolevel_namespace} %{twolevel_namespace_hints} \
 359    %{Zumbrella*: -umbrella %*} \
 360    %{undefined*} \
 361    %{Zunexported_symbols_list*:-unexported_symbols_list %*} \
 362    %{Zweak_reference_mismatches*:-weak_reference_mismatches %*} \
 363    %{!Zweak_reference_mismatches*:-weak_reference_mismatches non-weak} \
 364    %{X} \
 365    %{y*} \
 366    %{w} \
 367    %{pagezero_size*} %{segs_read_*} %{seglinkedit} %{noseglinkedit}  \
 368    %{sectalign*} %{sectobjectsymbols*} %{segcreate*} %{whyload} \
 369    %{whatsloaded} %{dylinker_install_name*} \
 370    %{dylinker} %{Mach} "
 371
 372
 373 /* Machine dependent libraries.  */
 374
 375 #define LIB_SPEC "%{!static:-lSystem}"
 376
 377 /* Support -mmacosx-version-min by supplying different (stub) libgcc_s.dylib
 378    libraries to link against, and by not linking against libgcc_s on
 379    earlier-than-10.3.9.
 380
 381    Note that by default, -lgcc_eh is not linked against!  This is
 382    because in a future version of Darwin the EH frame information may
 383    be in a new format, or the fallback routine might be changed; if
 384    you want to explicitly link against the static version of those
 385    routines, because you know you don't need to unwind through system
 386    libraries, you need to explicitly say -static-libgcc.
 387
 388    If it is linked against, it has to be before -lgcc, because it may
 389    need symbols from -lgcc.  */
 390 #undef REAL_LIBGCC_SPEC
 391 #define REAL_LIBGCC_SPEC                                                   \
 392    "%{static-libgcc|static: -lgcc_eh -lgcc;                                \
 393       shared-libgcc|fexceptions|fgnu-runtime:                              \
 394        %:version-compare(!> 10.5 mmacosx-version-min= -lgcc_s.10.4)        \
 395        %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_s.10.5)        \
 396        %:version-compare(!> 10.5 mmacosx-version-min= -lgcc_ext.10.4)      \
 397        %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_ext.10.5)      \
 398        -lgcc;                                                              \
 399       :%:version-compare(>< 10.3.9 10.5 mmacosx-version-min= -lgcc_s.10.4) \
 400        %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_s.10.5)        \
 401        %:version-compare(!> 10.5 mmacosx-version-min= -lgcc_ext.10.4)      \
 402        %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_ext.10.5)      \
 403        -lgcc}"
 404
 405 /* We specify crt0.o as -lcrt0.o so that ld will search the library path.
 406
 407    crt3.o provides __cxa_atexit on systems that don't have it.  Since
 408    it's only used with C++, which requires passing -shared-libgcc, key
 409    off that to avoid unnecessarily adding a destructor to every
 410    powerpc program built.  */
 411
 412 #undef  STARTFILE_SPEC
 413 #define STARTFILE_SPEC                                                      \
 414   "%{Zdynamiclib: %(darwin_dylib1) }                                        \
 415    %{!Zdynamiclib:%{Zbundle:%{!static:-lbundle1.o}}                         \
 416      %{!Zbundle:%{pg:%{static:-lgcrt0.o}                                    \
 417                      %{!static:%{object:-lgcrt0.o}                          \
 418                                %{!object:%{preload:-lgcrt0.o}               \
 419                                  %{!preload:-lgcrt1.o %(darwin_crt2)}}}}    \
 420                 %{!pg:%{static:-lcrt0.o}                                    \
 421                       %{!static:%{object:-lcrt0.o}                          \
 422                                 %{!object:%{preload:-lcrt0.o}               \
 423                                   %{!preload: %(darwin_crt1)                \
 424                                               %(darwin_crt2)}}}}}}          \
 425   %{shared-libgcc:%:version-compare(< 10.5 mmacosx-version-min= crt3.o%s)}"
 426
 427 /* The native Darwin linker doesn't necessarily place files in the order
 428    that they're specified on the link line.  Thus, it is pointless
 429    to put anything in ENDFILE_SPEC.  */
 430 /* #define ENDFILE_SPEC "" */
 431
 432 #define DARWIN_EXTRA_SPECS                                              \
 433   { "darwin_crt1", DARWIN_CRT1_SPEC },                                  \
 434   { "darwin_dylib1", DARWIN_DYLIB1_SPEC },                              \
 435   { "darwin_minversion", DARWIN_MINVERSION_SPEC },
 436
 437 #define DARWIN_DYLIB1_SPEC                                              \
 438   "%:version-compare(!> 10.5 mmacosx-version-min= -ldylib1.o)           \
 439    %:version-compare(>= 10.5 mmacosx-version-min= -ldylib1.10.5.o)"
 440
 441 #define DARWIN_CRT1_SPEC                                                \
 442   "%:version-compare(!> 10.5 mmacosx-version-min= -lcrt1.o)             \
 443    %:version-compare(>= 10.5 mmacosx-version-min= -lcrt1.10.5.o)"
 444
 445 /* Default Darwin ASM_SPEC, very simple.  */
 446 #define ASM_SPEC "-arch %(darwin_arch) \
 447   %{Zforce_cpusubtype_ALL:-force_cpusubtype_ALL}"
 448
 449 /* We still allow output of STABS.  */
 450
 451 #define DBX_DEBUGGING_INFO 1
 452
 453 #define DWARF2_DEBUGGING_INFO 1
 454 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
 455
 456 #define DEBUG_FRAME_SECTION     "__DWARF,__debug_frame,regular,debug"
 457 #define DEBUG_INFO_SECTION      "__DWARF,__debug_info,regular,debug"
 458 #define DEBUG_ABBREV_SECTION    "__DWARF,__debug_abbrev,regular,debug"
 459 #define DEBUG_ARANGES_SECTION   "__DWARF,__debug_aranges,regular,debug"
 460 #define DEBUG_MACINFO_SECTION   "__DWARF,__debug_macinfo,regular,debug"
 461 #define DEBUG_LINE_SECTION      "__DWARF,__debug_line,regular,debug"
 462 #define DEBUG_LOC_SECTION       "__DWARF,__debug_loc,regular,debug"
 463 #define DEBUG_PUBNAMES_SECTION  "__DWARF,__debug_pubnames,regular,debug"
 464 #define DEBUG_PUBTYPES_SECTION  "__DWARF,__debug_pubtypes,regular,debug"
 465 #define DEBUG_STR_SECTION       "__DWARF,__debug_str,regular,debug"
 466 #define DEBUG_RANGES_SECTION    "__DWARF,__debug_ranges,regular,debug"
 467
 468 /* When generating stabs debugging, use N_BINCL entries.  */
 469
 470 #define DBX_USE_BINCL
 471
 472 /* There is no limit to the length of stabs strings.  */
 473
 474 #define DBX_CONTIN_LENGTH 0
 475
 476 /* gdb needs a null N_SO at the end of each file for scattered loading.  */
 477
 478 #define DBX_OUTPUT_NULL_N_SO_AT_MAIN_SOURCE_FILE_END
 479
 480 /* GCC's definition of 'one_only' is the same as its definition of 'weak'.  */
 481 #define MAKE_DECL_ONE_ONLY(DECL) (DECL_WEAK (DECL) = 1)
 482
 483 /* Mach-O supports 'weak imports', and 'weak definitions' in coalesced
 484    sections.  machopic_select_section ensures that weak variables go in
 485    coalesced sections.  Weak aliases (or any other kind of aliases) are
 486    not supported.  Weak symbols that aren't visible outside the .s file
 487    are not supported.  */
 488 #define ASM_WEAKEN_DECL(FILE, DECL, NAME, ALIAS)                        \
 489   do {                                                                  \
 490     if (ALIAS)                                                          \
 491       {                                                                 \
 492         warning (0, "alias definitions not supported in Mach-O; ignored");      \
 493         break;                                                          \
 494       }                                                                 \
 495                                                                         \
 496     if (! DECL_EXTERNAL (DECL) && TREE_PUBLIC (DECL))                   \
 497       targetm.asm_out.globalize_label (FILE, NAME);                     \
 498     if (DECL_EXTERNAL (DECL))                                           \
 499       fputs ("\t.weak_reference ", FILE);                               \
 500     else if (! lookup_attribute ("weak", DECL_ATTRIBUTES (DECL))        \
 501         && lookup_attribute ("weak_import", DECL_ATTRIBUTES (DECL)))    \
 502       break;                                                            \
 503     else if (TREE_PUBLIC (DECL))                                        \
 504       fputs ("\t.weak_definition ", FILE);                              \
 505     else                                                                \
 506       break;                                                            \
 507     assemble_name (FILE, NAME);                                         \
 508     fputc ('\n', FILE);                                                 \
 509   } while (0)
 510
 511 /* Darwin has the pthread routines in libSystem, which every program
 512    links to, so there's no need for weak-ness for that.  */
 513 #define GTHREAD_USE_WEAK 0
 514
 515 /* The Darwin linker imposes two limitations on common symbols: they
 516    can't have hidden visibility, and they can't appear in dylibs.  As
 517    a consequence, we should never use common symbols to represent
 518    vague linkage. */
 519 #undef USE_COMMON_FOR_ONE_ONLY
 520 #define USE_COMMON_FOR_ONE_ONLY 0
 521
 522 /* The Darwin linker doesn't want coalesced symbols to appear in
 523    a static archive's table of contents. */
 524 #undef TARGET_WEAK_NOT_IN_ARCHIVE_TOC
 525 #define TARGET_WEAK_NOT_IN_ARCHIVE_TOC 1
 526
 527 /* On Darwin, we don't (at the time of writing) have linkonce sections
 528    with names, so it's safe to make the class data not comdat.  */
 529 #define TARGET_CXX_CLASS_DATA_ALWAYS_COMDAT hook_bool_void_false
 530
 531 /* For efficiency, on Darwin the RTTI information that is always
 532    emitted in the standard C++ library should not be COMDAT.  */
 533 #define TARGET_CXX_LIBRARY_RTTI_COMDAT hook_bool_void_false
 534
 535 /* We make exception information linkonce. */
 536 #undef TARGET_USES_WEAK_UNWIND_INFO
 537 #define TARGET_USES_WEAK_UNWIND_INFO 1
 538
 539 /* We need to use a nonlocal label for the start of an EH frame: the
 540    Darwin linker requires that a coalesced section start with a label.
 541    Unfortunately, it also requires that 'debug' sections don't contain
 542    labels.  */
 543 #undef FRAME_BEGIN_LABEL
 544 #define FRAME_BEGIN_LABEL (for_eh ? "EH_frame" : "Lframe")
 545
 546 /* Emit a label for the FDE corresponding to DECL.  EMPTY means
 547    emit a label for an empty FDE. */
 548 #define TARGET_ASM_EMIT_UNWIND_LABEL darwin_emit_unwind_label
 549
 550 /* Emit a label to separate the exception table.  */
 551 #define TARGET_ASM_EMIT_EXCEPT_TABLE_LABEL darwin_emit_except_table_label
 552
 553 /* Our profiling scheme doesn't LP labels and counter words.  */
 554
 555 #define NO_PROFILE_COUNTERS     1
 556
 557 #undef  INIT_SECTION_ASM_OP
 558 #define INIT_SECTION_ASM_OP
 559
 560 #undef  INVOKE__main
 561
 562 #define TARGET_ASM_CONSTRUCTOR  machopic_asm_out_constructor
 563 #define TARGET_ASM_DESTRUCTOR   machopic_asm_out_destructor
 564
 565 /* Always prefix with an underscore.  */
 566
 567 #define USER_LABEL_PREFIX "_"
 568
 569 /* A dummy symbol that will be replaced with the function base name.  */
 570 #define MACHOPIC_FUNCTION_BASE_NAME "<pic base>"
 571
 572 /* Don't output a .file directive.  That is only used by the assembler for
 573    error reporting.  */
 574 #undef  TARGET_ASM_FILE_START_FILE_DIRECTIVE
 575 #define TARGET_ASM_FILE_START_FILE_DIRECTIVE false
 576
 577 #undef  TARGET_ASM_FILE_END
 578 #define TARGET_ASM_FILE_END darwin_file_end
 579
 580 #define ASM_OUTPUT_SKIP(FILE,SIZE)  \
 581   fprintf (FILE, "\t.space "HOST_WIDE_INT_PRINT_UNSIGNED"\n", SIZE)
 582
 583 /* Give ObjC methods pretty symbol names.  */
 584
 585 #undef  OBJC_GEN_METHOD_LABEL
 586 #define OBJC_GEN_METHOD_LABEL(BUF,IS_INST,CLASS_NAME,CAT_NAME,SEL_NAME,NUM) \
 587   do { if (CAT_NAME)                                                    \
 588          sprintf (BUF, "%c[%s(%s) %s]", (IS_INST) ? '-' : '+',          \
 589                   (CLASS_NAME), (CAT_NAME), (SEL_NAME));                \
 590        else                                                             \
 591          sprintf (BUF, "%c[%s %s]", (IS_INST) ? '-' : '+',              \
 592                   (CLASS_NAME), (SEL_NAME));                            \
 593      } while (0)
 594
 595 /* The RTTI data (e.g., __ti4name) is common and public (and static),
 596    but it does need to be referenced via indirect PIC data pointers.
 597    The machopic_define_symbol calls are telling the machopic subsystem
 598    that the name *is* defined in this module, so it doesn't need to
 599    make them indirect.  */
 600
 601 #undef ASM_DECLARE_OBJECT_NAME
 602 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL)                       \
 603   do {                                                                  \
 604     const char *xname = NAME;                                           \
 605     if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF)             \
 606       xname = IDENTIFIER_POINTER (DECL_NAME (DECL));                    \
 607     if (! DECL_WEAK (DECL)                                              \
 608         && ((TREE_STATIC (DECL)                                         \
 609              && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))           \
 610             || DECL_INITIAL (DECL)))                                    \
 611         machopic_define_symbol (DECL_RTL (DECL));                       \
 612     if ((TREE_STATIC (DECL)                                             \
 613          && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))               \
 614         || DECL_INITIAL (DECL))                                         \
 615       (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false);   \
 616     ASM_OUTPUT_LABEL (FILE, xname);                                     \
 617     /* Darwin doesn't support zero-size objects, so give them a         \
 618        byte.  */                                                        \
 619     if (tree_low_cst (DECL_SIZE_UNIT (DECL), 1) == 0)                   \
 620       assemble_zeros (1);                                               \
 621   } while (0)
 622
 623 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL)                     \
 624   do {                                                                  \
 625     const char *xname = NAME;                                           \
 626     if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF)             \
 627       xname = IDENTIFIER_POINTER (DECL_NAME (DECL));                    \
 628     if (! DECL_WEAK (DECL)                                              \
 629         && ((TREE_STATIC (DECL)                                         \
 630              && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))           \
 631             || DECL_INITIAL (DECL)))                                    \
 632         machopic_define_symbol (DECL_RTL (DECL));                       \
 633     if ((TREE_STATIC (DECL)                                             \
 634          && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))               \
 635         || DECL_INITIAL (DECL))                                         \
 636       (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false);   \
 637     ASM_OUTPUT_LABEL (FILE, xname);                                     \
 638   } while (0)
 639
 640 #define ASM_DECLARE_CONSTANT_NAME(FILE, NAME, EXP, SIZE)        \
 641   do {                                                          \
 642     ASM_OUTPUT_LABEL (FILE, NAME);                              \
 643     /* Darwin doesn't support zero-size objects, so give them a \
 644        byte.  */                                                \
 645     if ((SIZE) == 0)                                            \
 646       assemble_zeros (1);                                       \
 647   } while (0)
 648
 649 /* Wrap new method names in quotes so the assembler doesn't gag.
 650    Make Objective-C internal symbols local.  */
 651
 652 #undef  ASM_OUTPUT_LABELREF
 653 #define ASM_OUTPUT_LABELREF(FILE,NAME)                                       \
 654   do {                                                                       \
 655        const char *xname = (NAME);                                           \
 656        if (! strcmp (xname, MACHOPIC_FUNCTION_BASE_NAME))                    \
 657          machopic_output_function_base_name(FILE);                           \
 658        else if (xname[0] == '&' || xname[0] == '*')                          \
 659          {                                                                   \
 660            int len = strlen (xname);                                         \
 661            if (len > 6 && !strcmp ("$stub", xname + len - 5))                \
 662              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 663            else if (len > 7 && !strcmp ("$stub\"", xname + len - 6))         \
 664              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 665            else if (len > 14 && !strcmp ("$non_lazy_ptr", xname + len - 13)) \
 666              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 667            else if (len > 15 && !strcmp ("$non_lazy_ptr\"", xname + len - 14)) \
 668              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 669            if (xname[1] != '"' && name_needs_quotes (&xname[1]))             \
 670              fprintf (FILE, "\"%s\"", &xname[1]);                            \
 671            else                                                              \
 672              fputs (&xname[1], FILE);                                        \
 673          }                                                                   \
 674        else if (xname[0] == '+' || xname[0] == '-')                          \
 675          fprintf (FILE, "\"%s\"", xname);                                    \
 676        else if (!strncmp (xname, "_OBJC_", 6))                               \
 677          fprintf (FILE, "L%s", xname);                                       \
 678        else if (!strncmp (xname, ".objc_class_name_", 17))                   \
 679          fprintf (FILE, "%s", xname);                                        \
 680        else if (xname[0] != '"' && name_needs_quotes (xname))                \
 681          fprintf (FILE, "\"%s\"", xname);                                    \
 682        else                                                                  \
 683          asm_fprintf (FILE, "%U%s", xname);                                  \
 684   } while (0)
 685
 686 /* Output before executable code.  */
 687 #undef TEXT_SECTION_ASM_OP
 688 #define TEXT_SECTION_ASM_OP "\t.text"
 689
 690 /* Output before writable data.  */
 691
 692 #undef DATA_SECTION_ASM_OP
 693 #define DATA_SECTION_ASM_OP "\t.data"
 694
 695 #undef  ALIGN_ASM_OP
 696 #define ALIGN_ASM_OP            ".align"
 697
 698 #undef  ASM_OUTPUT_ALIGN
 699 #define ASM_OUTPUT_ALIGN(FILE,LOG)      \
 700   if ((LOG) != 0)                       \
 701     fprintf (FILE, "\t%s %d\n", ALIGN_ASM_OP, (LOG))
 702
 703 /* Ensure correct alignment of bss data.  */
 704
 705 #undef  ASM_OUTPUT_ALIGNED_DECL_LOCAL
 706 #define ASM_OUTPUT_ALIGNED_DECL_LOCAL(FILE, DECL, NAME, SIZE, ALIGN)    \
 707   do {                                                                  \
 708     unsigned HOST_WIDE_INT _new_size = SIZE;                            \
 709     fputs (".lcomm ", (FILE));                                          \
 710     assemble_name ((FILE), (NAME));                                     \
 711     if (_new_size == 0) _new_size = 1;                                  \
 712     fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED",%u\n", _new_size, \
 713              floor_log2 ((ALIGN) / BITS_PER_UNIT));                     \
 714     if ((DECL) && ((TREE_STATIC (DECL)                                  \
 715          && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))               \
 716         || DECL_INITIAL (DECL)))                                        \
 717       {                                                                 \
 718         (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false); \
 719         machopic_define_symbol (DECL_RTL (DECL));                       \
 720       }                                                                 \
 721   } while (0)
 722
 723 /* The maximum alignment which the object file format can support in
 724    bits.  For Mach-O, this is 2^15 bytes.  */
 725
 726 #undef  MAX_OFILE_ALIGNMENT
 727 #define MAX_OFILE_ALIGNMENT (0x8000 * 8)
 728
 729 /* Declare the section variables.  */
 730 #ifndef USED_FOR_TARGET
 731 enum darwin_section_enum {
 732 #define DEF_SECTION(NAME, FLAGS, DIRECTIVE, OBJC) NAME,
 733 #include "darwin-sections.def"
 734 #undef DEF_SECTION
 735   NUM_DARWIN_SECTIONS
 736 };
 737 extern GTY(()) section * darwin_sections[NUM_DARWIN_SECTIONS];
 738 #endif
 739
 740 #undef  TARGET_ASM_SELECT_SECTION
 741 #define TARGET_ASM_SELECT_SECTION machopic_select_section
 742 #define USE_SELECT_SECTION_FOR_FUNCTIONS
 743
 744 #undef  TARGET_ASM_SELECT_RTX_SECTION
 745 #define TARGET_ASM_SELECT_RTX_SECTION machopic_select_rtx_section
 746 #undef  TARGET_ASM_UNIQUE_SECTION
 747 #define TARGET_ASM_UNIQUE_SECTION darwin_unique_section
 748 #undef  TARGET_ASM_FUNCTION_RODATA_SECTION
 749 #define TARGET_ASM_FUNCTION_RODATA_SECTION default_no_function_rodata_section
 750 #undef  TARGET_ASM_RELOC_RW_MASK
 751 #define TARGET_ASM_RELOC_RW_MASK machopic_reloc_rw_mask
 752
 753
 754 #define ASM_DECLARE_UNRESOLVED_REFERENCE(FILE,NAME)                     \
 755     do {                                                                \
 756          if (FILE) {                                                    \
 757            if (MACHOPIC_INDIRECT)                                       \
 758              fprintf (FILE, "\t.lazy_reference ");                      \
 759            else                                                         \
 760              fprintf (FILE, "\t.reference ");                           \
 761            assemble_name (FILE, NAME);                                  \
 762            fprintf (FILE, "\n");                                        \
 763          }                                                              \
 764        } while (0)
 765
 766 #define ASM_DECLARE_CLASS_REFERENCE(FILE,NAME)                          \
 767     do {                                                                \
 768          if (FILE) {                                                    \
 769            fprintf (FILE, "\t");                                        \
 770            assemble_name (FILE, NAME);                                  \
 771            fprintf (FILE, "=0\n");                                      \
 772            (*targetm.asm_out.globalize_label) (FILE, NAME);             \
 773          }                                                              \
 774        } while (0)
 775
 776 /* Globalizing directive for a label.  */
 777 #define GLOBAL_ASM_OP ".globl "
 778 #define TARGET_ASM_GLOBALIZE_LABEL darwin_globalize_label
 779
 780 /* Emit an assembler directive to set visibility for a symbol.  Used
 781    to support visibility attribute and Darwin's private extern
 782    feature.  */
 783 #undef TARGET_ASM_ASSEMBLE_VISIBILITY
 784 #define TARGET_ASM_ASSEMBLE_VISIBILITY darwin_assemble_visibility
 785
 786 /* Extra attributes for Darwin.  */
 787 #define SUBTARGET_ATTRIBUTE_TABLE                                            \
 788   /* { name, min_len, max_len, decl_req, type_req, fn_type_req, handler } */ \
 789   { "apple_kext_compatibility", 0, 0, false, true, false,                    \
 790     darwin_handle_kext_attribute },                                          \
 791   { "weak_import", 0, 0, true, false, false,                                 \
 792     darwin_handle_weak_import_attribute }
 793
 794 #undef ASM_GENERATE_INTERNAL_LABEL
 795 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM)   \
 796   sprintf (LABEL, "*%s%ld", PREFIX, (long)(NUM))
 797
 798 #undef TARGET_ASM_MARK_DECL_PRESERVED
 799 #define TARGET_ASM_MARK_DECL_PRESERVED darwin_mark_decl_preserved
 800
 801 /* Set on a symbol with SYMBOL_FLAG_FUNCTION or
 802    MACHO_SYMBOL_FLAG_VARIABLE to indicate that the function or
 803    variable has been defined in this translation unit.
 804    When porting Mach-O to new architectures you need to make
 805    sure these aren't clobbered by the backend.  */
 806
 807 #define MACHO_SYMBOL_FLAG_VARIABLE (SYMBOL_FLAG_MACH_DEP)
 808 #define MACHO_SYMBOL_FLAG_DEFINED ((SYMBOL_FLAG_MACH_DEP) << 1)
 809
 810 /* Set on a symbol to indicate when fix-and-continue style code
 811    generation is being used and the symbol refers to a static symbol
 812    that should be rebound from new instances of a translation unit to
 813    the original instance of the data.  */
 814
 815 #define MACHO_SYMBOL_STATIC ((SYMBOL_FLAG_MACH_DEP) << 2)
 816
 817 /* Symbolic names for various things we might know about a symbol.  */
 818
 819 enum machopic_addr_class {
 820   MACHOPIC_UNDEFINED,
 821   MACHOPIC_DEFINED_DATA,
 822   MACHOPIC_UNDEFINED_DATA,
 823   MACHOPIC_DEFINED_FUNCTION,
 824   MACHOPIC_UNDEFINED_FUNCTION
 825 };
 826
 827 /* Macros defining the various PIC cases.  */
 828
 829 #define MACHO_DYNAMIC_NO_PIC_P  (TARGET_DYNAMIC_NO_PIC)
 830 #define MACHOPIC_INDIRECT       (flag_pic || MACHO_DYNAMIC_NO_PIC_P)
 831 #define MACHOPIC_JUST_INDIRECT  (MACHO_DYNAMIC_NO_PIC_P)
 832 #define MACHOPIC_PURE           (flag_pic && ! MACHO_DYNAMIC_NO_PIC_P)
 833
 834 #undef TARGET_ENCODE_SECTION_INFO
 835 #define TARGET_ENCODE_SECTION_INFO  darwin_encode_section_info
 836 #undef TARGET_STRIP_NAME_ENCODING
 837 #define TARGET_STRIP_NAME_ENCODING  default_strip_name_encoding
 838
 839 #define GEN_BINDER_NAME_FOR_STUB(BUF,STUB,STUB_LENGTH)          \
 840   do {                                                          \
 841     const char *const stub_ = (STUB);                           \
 842     char *buffer_ = (BUF);                                      \
 843     strcpy (buffer_, stub_);                                    \
 844     if (stub_[0] == '"')                                        \
 845       {                                                         \
 846         strcpy (buffer_ + (STUB_LENGTH) - 1, "_binder\"");      \
 847       }                                                         \
 848     else                                                        \
 849       {                                                         \
 850         strcpy (buffer_ + (STUB_LENGTH), "_binder");            \
 851       }                                                         \
 852   } while (0)
 853
 854 #define GEN_SYMBOL_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH)    \
 855   do {                                                          \
 856     const char *const symbol_ = (SYMBOL);                       \
 857     char *buffer_ = (BUF);                                      \
 858     if (name_needs_quotes (symbol_) && symbol_[0] != '"')       \
 859       {                                                         \
 860           sprintf (buffer_, "\"%s\"", symbol_);                 \
 861       }                                                         \
 862     else                                                        \
 863       {                                                         \
 864         strcpy (buffer_, symbol_);                              \
 865       }                                                         \
 866   } while (0)
 867
 868 /* Given a symbol name string, create the lazy pointer version
 869    of the symbol name.  */
 870
 871 #define GEN_LAZY_PTR_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH)  \
 872   do {                                                          \
 873     const char *symbol_ = (SYMBOL);                             \
 874     char *buffer_ = (BUF);                                      \
 875     if (symbol_[0] == '"')                                      \
 876       {                                                         \
 877         strcpy (buffer_, "\"L");                                \
 878         strcpy (buffer_ + 2, symbol_ + 1);                      \
 879         strcpy (buffer_ + (SYMBOL_LENGTH), "$lazy_ptr\"");      \
 880       }                                                         \
 881     else if (name_needs_quotes (symbol_))                       \
 882       {                                                         \
 883         strcpy (buffer_, "\"L");                                \
 884         strcpy (buffer_ + 2, symbol_);                          \
 885         strcpy (buffer_ + (SYMBOL_LENGTH) + 2, "$lazy_ptr\"");  \
 886       }                                                         \
 887     else                                                        \
 888       {                                                         \
 889         strcpy (buffer_, "L");                                  \
 890         strcpy (buffer_ + 1, symbol_);                          \
 891         strcpy (buffer_ + (SYMBOL_LENGTH) + 1, "$lazy_ptr");    \
 892       }                                                         \
 893   } while (0)
 894
 895 #define EH_FRAME_SECTION_NAME   "__TEXT"
 896 #define EH_FRAME_SECTION_ATTR ",coalesced,no_toc+strip_static_syms+live_support"
 897
 898 /* Java runtime class list.  */
 899 #define JCR_SECTION_NAME "__DATA,jcr,regular,no_dead_strip"
 900
 901 #undef ASM_PREFERRED_EH_DATA_FORMAT
 902 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL)  \
 903   (((CODE) == 2 && (GLOBAL) == 1) \
 904    ? (DW_EH_PE_pcrel | DW_EH_PE_indirect | DW_EH_PE_sdata4) : \
 905      ((CODE) == 1 || (GLOBAL) == 0) ? DW_EH_PE_pcrel : DW_EH_PE_absptr)
 906
 907 #define ASM_OUTPUT_DWARF_DELTA(FILE,SIZE,LABEL1,LABEL2)  \
 908   darwin_asm_output_dwarf_delta (FILE, SIZE, LABEL1, LABEL2)
 909
 910 #define ASM_OUTPUT_DWARF_OFFSET(FILE,SIZE,LABEL,BASE)  \
 911   darwin_asm_output_dwarf_offset (FILE, SIZE, LABEL, BASE)
 912
 913 #define ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX(ASM_OUT_FILE, ENCODING, SIZE, ADDR, DONE)     \
 914       if (ENCODING == ASM_PREFERRED_EH_DATA_FORMAT (2, 1)) {                            \
 915         darwin_non_lazy_pcrel (ASM_OUT_FILE, ADDR);                                     \
 916         goto DONE;                                                                      \
 917       }
 918
 919 /* Experimentally, putting jump tables in text is faster on SPEC.
 920    Also this is needed for correctness for coalesced functions.  */
 921
 922 #ifndef JUMP_TABLES_IN_TEXT_SECTION
 923 #define JUMP_TABLES_IN_TEXT_SECTION 1
 924 #endif
 925
 926 #define TARGET_TERMINATE_DW2_EH_FRAME_INFO false
 927
 928 #define TARGET_ASM_INIT_SECTIONS darwin_init_sections
 929 #undef TARGET_ASM_NAMED_SECTION
 930 #define TARGET_ASM_NAMED_SECTION darwin_asm_named_section
 931
 932 /* Handle pragma weak and pragma pack.  */
 933 #define HANDLE_SYSV_PRAGMA 1
 934
 935 #define HANDLE_PRAGMA_PACK_PUSH_POP 1
 936
 937 #define DARWIN_REGISTER_TARGET_PRAGMAS()                        \
 938   do {                                                          \
 939     if (!flag_preprocess_only)                                  \
 940       cpp_register_pragma (parse_in, NULL, "mark",              \
 941                            darwin_pragma_ignore, false);        \
 942     c_register_pragma (0, "options", darwin_pragma_options);    \
 943     c_register_pragma (0, "segment", darwin_pragma_ignore);     \
 944     c_register_pragma (0, "unused", darwin_pragma_unused);      \
 945     c_register_pragma (0, "ms_struct", darwin_pragma_ms_struct); \
 946   } while (0)
 947
 948 #undef ASM_APP_ON
 949 #define ASM_APP_ON ""
 950 #undef ASM_APP_OFF
 951 #define ASM_APP_OFF ""
 952
 953 void darwin_register_frameworks (const char *, const char *, int);
 954 void darwin_register_objc_includes (const char *, const char *, int);
 955 #define TARGET_EXTRA_PRE_INCLUDES darwin_register_objc_includes
 956 #define TARGET_EXTRA_INCLUDES darwin_register_frameworks
 957
 958 void add_framework_path (char *);
 959 #define TARGET_OPTF add_framework_path
 960
 961 #define TARGET_POSIX_IO
 962
 963 /* All new versions of Darwin have C99 functions.  */
 964
 965 #define TARGET_C99_FUNCTIONS 1
 966
 967 #define WINT_TYPE "int"
 968
 969 /* Every program on darwin links against libSystem which contains the pthread
 970    routines, so there's no need to explicitly call out when doing threaded
 971    work.  */
 972
 973 #undef GOMP_SELF_SPECS
 974 #define GOMP_SELF_SPECS ""
 975
 976 /* Darwin can't support anchors until we can cope with the adjustments
 977    to size that ASM_DECLARE_OBJECT_NAME and ASM_DECLARE_CONSTANT_NAME
 978    when outputting members of an anchor block and the linker can be
 979    taught to keep them together or we find some other suitable
 980    code-gen technique.  */
 981
 982 #if 0
 983 #define TARGET_ASM_OUTPUT_ANCHOR darwin_asm_output_anchor
 984 #else
 985 #define TARGET_ASM_OUTPUT_ANCHOR NULL
 986 #endif
 987
 988 /* Attempt to turn on execute permission for the stack.  This may be
 989     used by TARGET_TRAMPOLINE_INIT if the target needs it (that is,
 990     if the target machine can change execute permissions on a page).
 991
 992     There is no way to query the execute permission of the stack, so
 993     we always issue the mprotect() call.
 994
 995     Unfortunately it is not possible to make this namespace-clean.
 996
 997     Also note that no errors should be emitted by this code; it is
 998     considered dangerous for library calls to send messages to
 999     stdout/stderr.  */
1000
1001 #define ENABLE_EXECUTE_STACK                                            \
1002 extern void __enable_execute_stack (void *);                            \
1003 void                                                                    \
1004 __enable_execute_stack (void *addr)                                     \
1005 {                                                                       \
1006    extern int mprotect (void *, size_t, int);                           \
1007    extern int getpagesize (void);                                       \
1008    static int size;                                                     \
1009    static long mask;                                                    \
1010                                                                         \
1011    char *page, *end;                                                    \
1012                                                                         \
1013    if (size == 0)                                                       \
1014      {                                                                  \
1015        size = getpagesize();                                            \
1016        mask = ~((long) size - 1);                                       \
1017      }                                                                  \
1018                                                                         \
1019    page = (char *) (((long) addr) & mask);                              \
1020    end  = (char *) ((((long) (addr + (TARGET_64BIT ? 48 : 40))) & mask) + size); \
1021                                                                         \
1022    /* 7 == PROT_READ | PROT_WRITE | PROT_EXEC */                        \
1023    (void) mprotect (page, end - page, 7);                               \
1024 }
1025
1026 /* For Apple KEXTs, we make the constructors return this to match gcc
1027    2.95.  */
1028 #define TARGET_CXX_CDTOR_RETURNS_THIS (darwin_kextabi_p)
1029 extern int flag_mkernel;
1030 extern int flag_apple_kext;
1031 #define TARGET_KEXTABI flag_apple_kext
1032
1033 #define TARGET_HAS_TARGETCM 1
1034
1035 #ifndef CROSS_DIRECTORY_STRUCTURE
1036 extern void darwin_default_min_version (int * argc, char *** argv);
1037 #define GCC_DRIVER_HOST_INITIALIZATION \
1038   darwin_default_min_version (&argc, &argv)
1039 #endif /* CROSS_DIRECTORY_STRUCTURE */
1040
1041 /* The Apple assembler and linker do not support constructor priorities.  */
1042 #undef SUPPORTS_INIT_PRIORITY
1043 #define SUPPORTS_INIT_PRIORITY 0
1044
1045 #endif /* CONFIG_DARWIN_H */