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