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    %{!Zdynamiclib: \
 262      %{Zforce_cpusubtype_ALL:-arch %(darwin_arch) -force_cpusubtype_ALL} \
 263      %{!Zforce_cpusubtype_ALL:-arch %(darwin_subarch)} \
 264      %{Zbundle:-bundle} \
 265      %{Zbundle_loader*:-bundle_loader %*} \
 266      %{client_name*} \
 267      %{compatibility_version*:%e-compatibility_version only allowed with -dynamiclib\
 268 } \
 269      %{current_version*:%e-current_version only allowed with -dynamiclib} \
 270      %{Zforce_flat_namespace:-force_flat_namespace} \
 271      %{Zinstall_name*:%e-install_name only allowed with -dynamiclib} \
 272      %{keep_private_externs} \
 273      %{private_bundle} \
 274     } \
 275    %{Zdynamiclib: -dylib \
 276      %{Zbundle:%e-bundle not allowed with -dynamiclib} \
 277      %{Zbundle_loader*:%e-bundle_loader not allowed with -dynamiclib} \
 278      %{client_name*:%e-client_name not allowed with -dynamiclib} \
 279      %{compatibility_version*:-dylib_compatibility_version %*} \
 280      %{current_version*:-dylib_current_version %*} \
 281      %{Zforce_cpusubtype_ALL:-arch %(darwin_arch)} \
 282      %{!Zforce_cpusubtype_ALL: -arch %(darwin_subarch)} \
 283      %{Zforce_flat_namespace:%e-force_flat_namespace not allowed with -dynamiclib} \
 284      %{Zinstall_name*:-dylib_install_name %*} \
 285      %{keep_private_externs:%e-keep_private_externs not allowed with -dynamiclib} \
 286      %{private_bundle:%e-private_bundle not allowed with -dynamiclib} \
 287     } \
 288    %{Zall_load:-all_load} \
 289    %{Zallowable_client*:-allowable_client %*} \
 290    %{Zbind_at_load:-bind_at_load} \
 291    %{Zarch_errors_fatal:-arch_errors_fatal} \
 292    %{Zdead_strip:-dead_strip} \
 293    %{Zno_dead_strip_inits_and_terms:-no_dead_strip_inits_and_terms} \
 294    %{Zdylib_file*:-dylib_file %*} \
 295    %{Zdynamic:-dynamic}\
 296    %{Zexported_symbols_list*:-exported_symbols_list %*} \
 297    %{Zflat_namespace:-flat_namespace} \
 298    %{headerpad_max_install_names*} \
 299    %{Zimage_base*:-image_base %*} \
 300    %{Zinit*:-init %*} \
 301    %{!mmacosx-version-min=*:-macosx_version_min %(darwin_minversion)} \
 302    %{mmacosx-version-min=*:-macosx_version_min %*} \
 303    %{nomultidefs} \
 304    %{Zmulti_module:-multi_module} %{Zsingle_module:-single_module} \
 305    %{Zmultiply_defined*:-multiply_defined %*} \
 306    %{!Zmultiply_defined*:%{shared-libgcc: \
 307      %:version-compare(< 10.5 mmacosx-version-min= -multiply_defined) \
 308      %:version-compare(< 10.5 mmacosx-version-min= suppress)}} \
 309    %{Zmultiplydefinedunused*:-multiply_defined_unused %*} \
 310    %{fpie:-pie} \
 311    %{prebind} %{noprebind} %{nofixprebinding} %{prebind_all_twolevel_modules} \
 312    %{read_only_relocs} \
 313    %{sectcreate*} %{sectorder*} %{seg1addr*} %{segprot*} \
 314    %{Zsegaddr*:-segaddr %*} \
 315    %{Zsegs_read_only_addr*:-segs_read_only_addr %*} \
 316    %{Zsegs_read_write_addr*:-segs_read_write_addr %*} \
 317    %{Zseg_addr_table*: -seg_addr_table %*} \
 318    %{Zfn_seg_addr_table_filename*:-seg_addr_table_filename %*} \
 319    %{sub_library*} %{sub_umbrella*} \
 320    " LINK_SYSROOT_SPEC " \
 321    %{twolevel_namespace} %{twolevel_namespace_hints} \
 322    %{Zumbrella*: -umbrella %*} \
 323    %{undefined*} \
 324    %{Zunexported_symbols_list*:-unexported_symbols_list %*} \
 325    %{Zweak_reference_mismatches*:-weak_reference_mismatches %*} \
 326    %{!Zweak_reference_mismatches*:-weak_reference_mismatches non-weak} \
 327    %{X} \
 328    %{y*} \
 329    %{w} \
 330    %{pagezero_size*} %{segs_read_*} %{seglinkedit} %{noseglinkedit}  \
 331    %{sectalign*} %{sectobjectsymbols*} %{segcreate*} %{whyload} \
 332    %{whatsloaded} %{dylinker_install_name*} \
 333    %{dylinker} %{Mach} "
 334
 335
 336 /* Machine dependent libraries.  */
 337
 338 #define LIB_SPEC "%{!static:-lSystem}"
 339
 340 /* Support -mmacosx-version-min by supplying different (stub) libgcc_s.dylib
 341    libraries to link against, and by not linking against libgcc_s on
 342    earlier-than-10.3.9.
 343
 344    Note that by default, -lgcc_eh is not linked against!  This is
 345    because in a future version of Darwin the EH frame information may
 346    be in a new format, or the fallback routine might be changed; if
 347    you want to explicitly link against the static version of those
 348    routines, because you know you don't need to unwind through system
 349    libraries, you need to explicitly say -static-libgcc.
 350
 351    If it is linked against, it has to be before -lgcc, because it may
 352    need symbols from -lgcc.  */
 353 #undef REAL_LIBGCC_SPEC
 354 #define REAL_LIBGCC_SPEC                                                   \
 355    "%{static-libgcc|static: -lgcc_eh -lgcc;                                \
 356       shared-libgcc|fexceptions|fgnu-runtime:                              \
 357        %:version-compare(!> 10.5 mmacosx-version-min= -lgcc_s.10.4)        \
 358        %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_s.10.5)        \
 359        -lgcc;                                                              \
 360       :%:version-compare(>< 10.3.9 10.5 mmacosx-version-min= -lgcc_s.10.4) \
 361        %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_s.10.5)        \
 362        -lgcc}"
 363
 364 /* We specify crt0.o as -lcrt0.o so that ld will search the library path.
 365
 366    crt3.o provides __cxa_atexit on systems that don't have it.  Since
 367    it's only used with C++, which requires passing -shared-libgcc, key
 368    off that to avoid unnecessarily adding a destructor to every
 369    powerpc program built.  */
 370
 371 #undef  STARTFILE_SPEC
 372 #define STARTFILE_SPEC                                                      \
 373   "%{Zdynamiclib: %(darwin_dylib1) }                                        \
 374    %{!Zdynamiclib:%{Zbundle:%{!static:-lbundle1.o}}                         \
 375      %{!Zbundle:%{pg:%{static:-lgcrt0.o}                                    \
 376                      %{!static:%{object:-lgcrt0.o}                          \
 377                                %{!object:%{preload:-lgcrt0.o}               \
 378                                  %{!preload:-lgcrt1.o %(darwin_crt2)}}}}    \
 379                 %{!pg:%{static:-lcrt0.o}                                    \
 380                       %{!static:%{object:-lcrt0.o}                          \
 381                                 %{!object:%{preload:-lcrt0.o}               \
 382                                   %{!preload: %(darwin_crt1)                \
 383                                               %(darwin_crt2)}}}}}}          \
 384   %{shared-libgcc:%:version-compare(< 10.5 mmacosx-version-min= crt3.o%s)}"
 385
 386 /* The native Darwin linker doesn't necessarily place files in the order
 387    that they're specified on the link line.  Thus, it is pointless
 388    to put anything in ENDFILE_SPEC.  */
 389 /* #define ENDFILE_SPEC "" */
 390
 391 #define DARWIN_EXTRA_SPECS                                              \
 392   { "darwin_crt1", DARWIN_CRT1_SPEC },                                  \
 393   { "darwin_dylib1", DARWIN_DYLIB1_SPEC },                              \
 394   { "darwin_minversion", DARWIN_MINVERSION_SPEC },
 395
 396 #define DARWIN_DYLIB1_SPEC                                              \
 397   "%:version-compare(!> 10.5 mmacosx-version-min= -ldylib1.o)           \
 398    %:version-compare(>= 10.5 mmacosx-version-min= -ldylib1.10.5.o)"
 399
 400 #define DARWIN_CRT1_SPEC                                                \
 401   "%:version-compare(!> 10.5 mmacosx-version-min= -lcrt1.o)             \
 402    %:version-compare(>= 10.5 mmacosx-version-min= -lcrt1.10.5.o)"
 403
 404 /* Default Darwin ASM_SPEC, very simple.  */
 405 #define ASM_SPEC "-arch %(darwin_arch) \
 406   %{Zforce_cpusubtype_ALL:-force_cpusubtype_ALL}"
 407
 408 /* We still allow output of STABS.  */
 409
 410 #define DBX_DEBUGGING_INFO 1
 411
 412 #define DWARF2_DEBUGGING_INFO
 413 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
 414
 415 #define DEBUG_FRAME_SECTION     "__DWARF,__debug_frame,regular,debug"
 416 #define DEBUG_INFO_SECTION      "__DWARF,__debug_info,regular,debug"
 417 #define DEBUG_ABBREV_SECTION    "__DWARF,__debug_abbrev,regular,debug"
 418 #define DEBUG_ARANGES_SECTION   "__DWARF,__debug_aranges,regular,debug"
 419 #define DEBUG_MACINFO_SECTION   "__DWARF,__debug_macinfo,regular,debug"
 420 #define DEBUG_LINE_SECTION      "__DWARF,__debug_line,regular,debug"
 421 #define DEBUG_LOC_SECTION       "__DWARF,__debug_loc,regular,debug"
 422 #define DEBUG_PUBNAMES_SECTION  "__DWARF,__debug_pubnames,regular,debug"
 423 #define DEBUG_PUBTYPES_SECTION  "__DWARF,__debug_pubtypes,regular,debug"
 424 #define DEBUG_STR_SECTION       "__DWARF,__debug_str,regular,debug"
 425 #define DEBUG_RANGES_SECTION    "__DWARF,__debug_ranges,regular,debug"
 426
 427 /* When generating stabs debugging, use N_BINCL entries.  */
 428
 429 #define DBX_USE_BINCL
 430
 431 /* There is no limit to the length of stabs strings.  */
 432
 433 #define DBX_CONTIN_LENGTH 0
 434
 435 /* gdb needs a null N_SO at the end of each file for scattered loading.  */
 436
 437 #define DBX_OUTPUT_NULL_N_SO_AT_MAIN_SOURCE_FILE_END
 438
 439 /* GCC's definition of 'one_only' is the same as its definition of 'weak'.  */
 440 #define MAKE_DECL_ONE_ONLY(DECL) (DECL_WEAK (DECL) = 1)
 441
 442 /* Mach-O supports 'weak imports', and 'weak definitions' in coalesced
 443    sections.  machopic_select_section ensures that weak variables go in
 444    coalesced sections.  Weak aliases (or any other kind of aliases) are
 445    not supported.  Weak symbols that aren't visible outside the .s file
 446    are not supported.  */
 447 #define ASM_WEAKEN_DECL(FILE, DECL, NAME, ALIAS)                        \
 448   do {                                                                  \
 449     if (ALIAS)                                                          \
 450       {                                                                 \
 451         warning (0, "alias definitions not supported in Mach-O; ignored");      \
 452         break;                                                          \
 453       }                                                                 \
 454                                                                         \
 455     if (! DECL_EXTERNAL (DECL) && TREE_PUBLIC (DECL))                   \
 456       targetm.asm_out.globalize_label (FILE, NAME);                     \
 457     if (DECL_EXTERNAL (DECL))                                           \
 458       fputs ("\t.weak_reference ", FILE);                               \
 459     else if (! lookup_attribute ("weak", DECL_ATTRIBUTES (DECL))        \
 460         && lookup_attribute ("weak_import", DECL_ATTRIBUTES (DECL)))    \
 461       break;                                                            \
 462     else if (TREE_PUBLIC (DECL))                                        \
 463       fputs ("\t.weak_definition ", FILE);                              \
 464     else                                                                \
 465       break;                                                            \
 466     assemble_name (FILE, NAME);                                         \
 467     fputc ('\n', FILE);                                                 \
 468   } while (0)
 469
 470 /* Darwin has the pthread routines in libSystem, which every program
 471    links to, so there's no need for weak-ness for that.  */
 472 #define GTHREAD_USE_WEAK 0
 473
 474 /* The Darwin linker imposes two limitations on common symbols: they
 475    can't have hidden visibility, and they can't appear in dylibs.  As
 476    a consequence, we should never use common symbols to represent
 477    vague linkage. */
 478 #undef USE_COMMON_FOR_ONE_ONLY
 479 #define USE_COMMON_FOR_ONE_ONLY 0
 480
 481 /* The Darwin linker doesn't want coalesced symbols to appear in
 482    a static archive's table of contents. */
 483 #undef TARGET_WEAK_NOT_IN_ARCHIVE_TOC
 484 #define TARGET_WEAK_NOT_IN_ARCHIVE_TOC 1
 485
 486 /* On Darwin, we don't (at the time of writing) have linkonce sections
 487    with names, so it's safe to make the class data not comdat.  */
 488 #define TARGET_CXX_CLASS_DATA_ALWAYS_COMDAT hook_bool_void_false
 489
 490 /* For efficiency, on Darwin the RTTI information that is always
 491    emitted in the standard C++ library should not be COMDAT.  */
 492 #define TARGET_CXX_LIBRARY_RTTI_COMDAT hook_bool_void_false
 493
 494 /* We make exception information linkonce. */
 495 #undef TARGET_USES_WEAK_UNWIND_INFO
 496 #define TARGET_USES_WEAK_UNWIND_INFO 1
 497
 498 /* We need to use a nonlocal label for the start of an EH frame: the
 499    Darwin linker requires that a coalesced section start with a label.
 500    Unfortunately, it also requires that 'debug' sections don't contain
 501    labels.  */
 502 #undef FRAME_BEGIN_LABEL
 503 #define FRAME_BEGIN_LABEL (for_eh ? "EH_frame" : "Lframe")
 504
 505 /* Emit a label for the FDE corresponding to DECL.  EMPTY means
 506    emit a label for an empty FDE. */
 507 #define TARGET_ASM_EMIT_UNWIND_LABEL darwin_emit_unwind_label
 508
 509 /* Emit a label to separate the exception table.  */
 510 #define TARGET_ASM_EMIT_EXCEPT_TABLE_LABEL darwin_emit_except_table_label
 511
 512 /* Our profiling scheme doesn't LP labels and counter words.  */
 513
 514 #define NO_PROFILE_COUNTERS     1
 515
 516 #undef  INIT_SECTION_ASM_OP
 517 #define INIT_SECTION_ASM_OP
 518
 519 #undef  INVOKE__main
 520
 521 #define TARGET_ASM_CONSTRUCTOR  machopic_asm_out_constructor
 522 #define TARGET_ASM_DESTRUCTOR   machopic_asm_out_destructor
 523
 524 /* Always prefix with an underscore.  */
 525
 526 #define USER_LABEL_PREFIX "_"
 527
 528 /* A dummy symbol that will be replaced with the function base name.  */
 529 #define MACHOPIC_FUNCTION_BASE_NAME "<pic base>"
 530
 531 /* Don't output a .file directive.  That is only used by the assembler for
 532    error reporting.  */
 533 #undef  TARGET_ASM_FILE_START_FILE_DIRECTIVE
 534 #define TARGET_ASM_FILE_START_FILE_DIRECTIVE false
 535
 536 #undef  TARGET_ASM_FILE_END
 537 #define TARGET_ASM_FILE_END darwin_file_end
 538
 539 #define ASM_OUTPUT_SKIP(FILE,SIZE)  \
 540   fprintf (FILE, "\t.space "HOST_WIDE_INT_PRINT_UNSIGNED"\n", SIZE)
 541
 542 /* Give ObjC methods pretty symbol names.  */
 543
 544 #undef  OBJC_GEN_METHOD_LABEL
 545 #define OBJC_GEN_METHOD_LABEL(BUF,IS_INST,CLASS_NAME,CAT_NAME,SEL_NAME,NUM) \
 546   do { if (CAT_NAME)                                                    \
 547          sprintf (BUF, "%c[%s(%s) %s]", (IS_INST) ? '-' : '+',          \
 548                   (CLASS_NAME), (CAT_NAME), (SEL_NAME));                \
 549        else                                                             \
 550          sprintf (BUF, "%c[%s %s]", (IS_INST) ? '-' : '+',              \
 551                   (CLASS_NAME), (SEL_NAME));                            \
 552      } while (0)
 553
 554 /* The RTTI data (e.g., __ti4name) is common and public (and static),
 555    but it does need to be referenced via indirect PIC data pointers.
 556    The machopic_define_symbol calls are telling the machopic subsystem
 557    that the name *is* defined in this module, so it doesn't need to
 558    make them indirect.  */
 559
 560 #undef ASM_DECLARE_OBJECT_NAME
 561 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL)                       \
 562   do {                                                                  \
 563     const char *xname = NAME;                                           \
 564     if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF)             \
 565       xname = IDENTIFIER_POINTER (DECL_NAME (DECL));                    \
 566     if (! DECL_WEAK (DECL)                                              \
 567         && ((TREE_STATIC (DECL)                                         \
 568              && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))           \
 569             || DECL_INITIAL (DECL)))                                    \
 570         machopic_define_symbol (DECL_RTL (DECL));                       \
 571     if ((TREE_STATIC (DECL)                                             \
 572          && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))               \
 573         || DECL_INITIAL (DECL))                                         \
 574       (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false);   \
 575     ASM_OUTPUT_LABEL (FILE, xname);                                     \
 576     /* Darwin doesn't support zero-size objects, so give them a         \
 577        byte.  */                                                        \
 578     if (tree_low_cst (DECL_SIZE_UNIT (DECL), 1) == 0)                   \
 579       assemble_zeros (1);                                               \
 580   } while (0)
 581
 582 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL)                     \
 583   do {                                                                  \
 584     const char *xname = NAME;                                           \
 585     if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF)             \
 586       xname = IDENTIFIER_POINTER (DECL_NAME (DECL));                    \
 587     if (! DECL_WEAK (DECL)                                              \
 588         && ((TREE_STATIC (DECL)                                         \
 589              && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))           \
 590             || DECL_INITIAL (DECL)))                                    \
 591         machopic_define_symbol (DECL_RTL (DECL));                       \
 592     if ((TREE_STATIC (DECL)                                             \
 593          && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))               \
 594         || DECL_INITIAL (DECL))                                         \
 595       (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false);   \
 596     ASM_OUTPUT_LABEL (FILE, xname);                                     \
 597   } while (0)
 598
 599 #define ASM_DECLARE_CONSTANT_NAME(FILE, NAME, EXP, SIZE)        \
 600   do {                                                          \
 601     ASM_OUTPUT_LABEL (FILE, NAME);                              \
 602     /* Darwin doesn't support zero-size objects, so give them a \
 603        byte.  */                                                \
 604     if ((SIZE) == 0)                                            \
 605       assemble_zeros (1);                                       \
 606   } while (0)
 607
 608 /* Wrap new method names in quotes so the assembler doesn't gag.
 609    Make Objective-C internal symbols local.  */
 610
 611 #undef  ASM_OUTPUT_LABELREF
 612 #define ASM_OUTPUT_LABELREF(FILE,NAME)                                       \
 613   do {                                                                       \
 614        const char *xname = (NAME);                                           \
 615        if (! strcmp (xname, MACHOPIC_FUNCTION_BASE_NAME))                    \
 616          machopic_output_function_base_name(FILE);                           \
 617        else if (xname[0] == '&' || xname[0] == '*')                          \
 618          {                                                                   \
 619            int len = strlen (xname);                                         \
 620            if (len > 6 && !strcmp ("$stub", xname + len - 5))                \
 621              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 622            else if (len > 7 && !strcmp ("$stub\"", xname + len - 6))         \
 623              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 624            else if (len > 14 && !strcmp ("$non_lazy_ptr", xname + len - 13)) \
 625              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 626            else if (len > 15 && !strcmp ("$non_lazy_ptr\"", xname + len - 14)) \
 627              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 628            if (xname[1] != '"' && name_needs_quotes (&xname[1]))             \
 629              fprintf (FILE, "\"%s\"", &xname[1]);                            \
 630            else                                                              \
 631              fputs (&xname[1], FILE);                                        \
 632          }                                                                   \
 633        else if (xname[0] == '+' || xname[0] == '-')                          \
 634          fprintf (FILE, "\"%s\"", xname);                                    \
 635        else if (!strncmp (xname, "_OBJC_", 6))                               \
 636          fprintf (FILE, "L%s", xname);                                       \
 637        else if (!strncmp (xname, ".objc_class_name_", 17))                   \
 638          fprintf (FILE, "%s", xname);                                        \
 639        else if (xname[0] != '"' && name_needs_quotes (xname))                \
 640          fprintf (FILE, "\"%s\"", xname);                                    \
 641        else                                                                  \
 642          asm_fprintf (FILE, "%U%s", xname);                                  \
 643   } while (0)
 644
 645 /* Output before executable code.  */
 646 #undef TEXT_SECTION_ASM_OP
 647 #define TEXT_SECTION_ASM_OP "\t.text"
 648
 649 /* Output before writable data.  */
 650
 651 #undef DATA_SECTION_ASM_OP
 652 #define DATA_SECTION_ASM_OP "\t.data"
 653
 654 #undef  ALIGN_ASM_OP
 655 #define ALIGN_ASM_OP            ".align"
 656
 657 #undef  ASM_OUTPUT_ALIGN
 658 #define ASM_OUTPUT_ALIGN(FILE,LOG)      \
 659   if ((LOG) != 0)                       \
 660     fprintf (FILE, "\t%s %d\n", ALIGN_ASM_OP, (LOG))
 661
 662 /* Ensure correct alignment of bss data.  */
 663
 664 #undef  ASM_OUTPUT_ALIGNED_DECL_LOCAL
 665 #define ASM_OUTPUT_ALIGNED_DECL_LOCAL(FILE, DECL, NAME, SIZE, ALIGN)    \
 666   do {                                                                  \
 667     unsigned HOST_WIDE_INT _new_size = SIZE;                            \
 668     fputs (".lcomm ", (FILE));                                          \
 669     assemble_name ((FILE), (NAME));                                     \
 670     if (_new_size == 0) _new_size = 1;                                  \
 671     fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED",%u\n", _new_size, \
 672              floor_log2 ((ALIGN) / BITS_PER_UNIT));                     \
 673     if ((DECL) && ((TREE_STATIC (DECL)                                  \
 674          && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))               \
 675         || DECL_INITIAL (DECL)))                                        \
 676       {                                                                 \
 677         (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false); \
 678         machopic_define_symbol (DECL_RTL (DECL));                       \
 679       }                                                                 \
 680   } while (0)
 681
 682 /* The maximum alignment which the object file format can support in
 683    bits.  For Mach-O, this is 2^15 bytes.  */
 684
 685 #undef  MAX_OFILE_ALIGNMENT
 686 #define MAX_OFILE_ALIGNMENT (0x8000 * 8)
 687
 688 /* Declare the section variables.  */
 689 #ifndef USED_FOR_TARGET
 690 enum darwin_section_enum {
 691 #define DEF_SECTION(NAME, FLAGS, DIRECTIVE, OBJC) NAME,
 692 #include "darwin-sections.def"
 693 #undef DEF_SECTION
 694   NUM_DARWIN_SECTIONS
 695 };
 696 extern GTY(()) section * darwin_sections[NUM_DARWIN_SECTIONS];
 697 #endif
 698
 699 #undef  TARGET_ASM_SELECT_SECTION
 700 #define TARGET_ASM_SELECT_SECTION machopic_select_section
 701 #define USE_SELECT_SECTION_FOR_FUNCTIONS
 702
 703 #undef  TARGET_ASM_SELECT_RTX_SECTION
 704 #define TARGET_ASM_SELECT_RTX_SECTION machopic_select_rtx_section
 705 #undef  TARGET_ASM_UNIQUE_SECTION
 706 #define TARGET_ASM_UNIQUE_SECTION darwin_unique_section
 707 #undef  TARGET_ASM_FUNCTION_RODATA_SECTION
 708 #define TARGET_ASM_FUNCTION_RODATA_SECTION default_no_function_rodata_section
 709 #undef  TARGET_ASM_RELOC_RW_MASK
 710 #define TARGET_ASM_RELOC_RW_MASK machopic_reloc_rw_mask
 711
 712
 713 #define ASM_DECLARE_UNRESOLVED_REFERENCE(FILE,NAME)                     \
 714     do {                                                                \
 715          if (FILE) {                                                    \
 716            if (MACHOPIC_INDIRECT)                                       \
 717              fprintf (FILE, "\t.lazy_reference ");                      \
 718            else                                                         \
 719              fprintf (FILE, "\t.reference ");                           \
 720            assemble_name (FILE, NAME);                                  \
 721            fprintf (FILE, "\n");                                        \
 722          }                                                              \
 723        } while (0)
 724
 725 #define ASM_DECLARE_CLASS_REFERENCE(FILE,NAME)                          \
 726     do {                                                                \
 727          if (FILE) {                                                    \
 728            fprintf (FILE, "\t");                                        \
 729            assemble_name (FILE, NAME);                                  \
 730            fprintf (FILE, "=0\n");                                      \
 731            (*targetm.asm_out.globalize_label) (FILE, NAME);             \
 732          }                                                              \
 733        } while (0)
 734
 735 /* Globalizing directive for a label.  */
 736 #define GLOBAL_ASM_OP ".globl "
 737 #define TARGET_ASM_GLOBALIZE_LABEL darwin_globalize_label
 738
 739 /* Emit an assembler directive to set visibility for a symbol.  Used
 740    to support visibility attribute and Darwin's private extern
 741    feature.  */
 742 #undef TARGET_ASM_ASSEMBLE_VISIBILITY
 743 #define TARGET_ASM_ASSEMBLE_VISIBILITY darwin_assemble_visibility
 744
 745 /* Extra attributes for Darwin.  */
 746 #define SUBTARGET_ATTRIBUTE_TABLE                                            \
 747   /* { name, min_len, max_len, decl_req, type_req, fn_type_req, handler } */ \
 748   { "apple_kext_compatibility", 0, 0, false, true, false,                    \
 749     darwin_handle_kext_attribute },                                          \
 750   { "weak_import", 0, 0, true, false, false,                                 \
 751     darwin_handle_weak_import_attribute }
 752
 753 #undef ASM_GENERATE_INTERNAL_LABEL
 754 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM)   \
 755   sprintf (LABEL, "*%s%ld", PREFIX, (long)(NUM))
 756
 757 #undef TARGET_ASM_MARK_DECL_PRESERVED
 758 #define TARGET_ASM_MARK_DECL_PRESERVED darwin_mark_decl_preserved
 759
 760 /* Set on a symbol with SYMBOL_FLAG_FUNCTION or
 761    MACHO_SYMBOL_FLAG_VARIABLE to indicate that the function or
 762    variable has been defined in this translation unit.
 763    When porting Mach-O to new architectures you need to make
 764    sure these aren't clobbered by the backend.  */
 765
 766 #define MACHO_SYMBOL_FLAG_VARIABLE (SYMBOL_FLAG_MACH_DEP)
 767 #define MACHO_SYMBOL_FLAG_DEFINED ((SYMBOL_FLAG_MACH_DEP) << 1)
 768
 769 /* Set on a symbol to indicate when fix-and-continue style code
 770    generation is being used and the symbol refers to a static symbol
 771    that should be rebound from new instances of a translation unit to
 772    the original instance of the data.  */
 773
 774 #define MACHO_SYMBOL_STATIC ((SYMBOL_FLAG_MACH_DEP) << 2)
 775
 776 /* Symbolic names for various things we might know about a symbol.  */
 777
 778 enum machopic_addr_class {
 779   MACHOPIC_UNDEFINED,
 780   MACHOPIC_DEFINED_DATA,
 781   MACHOPIC_UNDEFINED_DATA,
 782   MACHOPIC_DEFINED_FUNCTION,
 783   MACHOPIC_UNDEFINED_FUNCTION
 784 };
 785
 786 /* Macros defining the various PIC cases.  */
 787
 788 #define MACHO_DYNAMIC_NO_PIC_P  (TARGET_DYNAMIC_NO_PIC)
 789 #define MACHOPIC_INDIRECT       (flag_pic || MACHO_DYNAMIC_NO_PIC_P)
 790 #define MACHOPIC_JUST_INDIRECT  (MACHO_DYNAMIC_NO_PIC_P)
 791 #define MACHOPIC_PURE           (flag_pic && ! MACHO_DYNAMIC_NO_PIC_P)
 792
 793 #undef TARGET_ENCODE_SECTION_INFO
 794 #define TARGET_ENCODE_SECTION_INFO  darwin_encode_section_info
 795 #undef TARGET_STRIP_NAME_ENCODING
 796 #define TARGET_STRIP_NAME_ENCODING  default_strip_name_encoding
 797
 798 #define GEN_BINDER_NAME_FOR_STUB(BUF,STUB,STUB_LENGTH)          \
 799   do {                                                          \
 800     const char *const stub_ = (STUB);                           \
 801     char *buffer_ = (BUF);                                      \
 802     strcpy (buffer_, stub_);                                    \
 803     if (stub_[0] == '"')                                        \
 804       {                                                         \
 805         strcpy (buffer_ + (STUB_LENGTH) - 1, "_binder\"");      \
 806       }                                                         \
 807     else                                                        \
 808       {                                                         \
 809         strcpy (buffer_ + (STUB_LENGTH), "_binder");            \
 810       }                                                         \
 811   } while (0)
 812
 813 #define GEN_SYMBOL_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH)    \
 814   do {                                                          \
 815     const char *const symbol_ = (SYMBOL);                       \
 816     char *buffer_ = (BUF);                                      \
 817     if (name_needs_quotes (symbol_) && symbol_[0] != '"')       \
 818       {                                                         \
 819           sprintf (buffer_, "\"%s\"", symbol_);                 \
 820       }                                                         \
 821     else                                                        \
 822       {                                                         \
 823         strcpy (buffer_, symbol_);                              \
 824       }                                                         \
 825   } while (0)
 826
 827 /* Given a symbol name string, create the lazy pointer version
 828    of the symbol name.  */
 829
 830 #define GEN_LAZY_PTR_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH)  \
 831   do {                                                          \
 832     const char *symbol_ = (SYMBOL);                             \
 833     char *buffer_ = (BUF);                                      \
 834     if (symbol_[0] == '"')                                      \
 835       {                                                         \
 836         strcpy (buffer_, "\"L");                                \
 837         strcpy (buffer_ + 2, symbol_ + 1);                      \
 838         strcpy (buffer_ + (SYMBOL_LENGTH), "$lazy_ptr\"");      \
 839       }                                                         \
 840     else if (name_needs_quotes (symbol_))                       \
 841       {                                                         \
 842         strcpy (buffer_, "\"L");                                \
 843         strcpy (buffer_ + 2, symbol_);                          \
 844         strcpy (buffer_ + (SYMBOL_LENGTH) + 2, "$lazy_ptr\"");  \
 845       }                                                         \
 846     else                                                        \
 847       {                                                         \
 848         strcpy (buffer_, "L");                                  \
 849         strcpy (buffer_ + 1, symbol_);                          \
 850         strcpy (buffer_ + (SYMBOL_LENGTH) + 1, "$lazy_ptr");    \
 851       }                                                         \
 852   } while (0)
 853
 854 #define EH_FRAME_SECTION_NAME   "__TEXT"
 855 #define EH_FRAME_SECTION_ATTR ",coalesced,no_toc+strip_static_syms+live_support"
 856
 857 /* Java runtime class list.  */
 858 #define JCR_SECTION_NAME "__DATA,jcr,regular,no_dead_strip"
 859
 860 #undef ASM_PREFERRED_EH_DATA_FORMAT
 861 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL)  \
 862   (((CODE) == 2 && (GLOBAL) == 1) \
 863    ? (DW_EH_PE_pcrel | DW_EH_PE_indirect | DW_EH_PE_sdata4) : \
 864      ((CODE) == 1 || (GLOBAL) == 0) ? DW_EH_PE_pcrel : DW_EH_PE_absptr)
 865
 866 #define ASM_OUTPUT_DWARF_DELTA(FILE,SIZE,LABEL1,LABEL2)  \
 867   darwin_asm_output_dwarf_delta (FILE, SIZE, LABEL1, LABEL2)
 868
 869 #define ASM_OUTPUT_DWARF_OFFSET(FILE,SIZE,LABEL,BASE)  \
 870   darwin_asm_output_dwarf_offset (FILE, SIZE, LABEL, BASE)
 871
 872 #define ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX(ASM_OUT_FILE, ENCODING, SIZE, ADDR, DONE)     \
 873       if (ENCODING == ASM_PREFERRED_EH_DATA_FORMAT (2, 1)) {                            \
 874         darwin_non_lazy_pcrel (ASM_OUT_FILE, ADDR);                                     \
 875         goto DONE;                                                                      \
 876       }
 877
 878 /* Experimentally, putting jump tables in text is faster on SPEC.
 879    Also this is needed for correctness for coalesced functions.  */
 880
 881 #ifndef JUMP_TABLES_IN_TEXT_SECTION
 882 #define JUMP_TABLES_IN_TEXT_SECTION 1
 883 #endif
 884
 885 #define TARGET_TERMINATE_DW2_EH_FRAME_INFO false
 886
 887 #define TARGET_ASM_INIT_SECTIONS darwin_init_sections
 888 #undef TARGET_ASM_NAMED_SECTION
 889 #define TARGET_ASM_NAMED_SECTION darwin_asm_named_section
 890
 891 /* Handle pragma weak and pragma pack.  */
 892 #define HANDLE_SYSV_PRAGMA 1
 893
 894 #define HANDLE_PRAGMA_PACK_PUSH_POP 1
 895
 896 #define DARWIN_REGISTER_TARGET_PRAGMAS()                        \
 897   do {                                                          \
 898     if (!flag_preprocess_only)                                  \
 899       cpp_register_pragma (parse_in, NULL, "mark",              \
 900                            darwin_pragma_ignore, false);        \
 901     c_register_pragma (0, "options", darwin_pragma_options);    \
 902     c_register_pragma (0, "segment", darwin_pragma_ignore);     \
 903     c_register_pragma (0, "unused", darwin_pragma_unused);      \
 904     c_register_pragma (0, "ms_struct", darwin_pragma_ms_struct); \
 905   } while (0)
 906
 907 #undef ASM_APP_ON
 908 #define ASM_APP_ON ""
 909 #undef ASM_APP_OFF
 910 #define ASM_APP_OFF ""
 911
 912 void darwin_register_frameworks (const char *, const char *, int);
 913 void darwin_register_objc_includes (const char *, const char *, int);
 914 #define TARGET_EXTRA_PRE_INCLUDES darwin_register_objc_includes
 915 #define TARGET_EXTRA_INCLUDES darwin_register_frameworks
 916
 917 void add_framework_path (char *);
 918 #define TARGET_OPTF add_framework_path
 919
 920 #define TARGET_POSIX_IO
 921
 922 /* All new versions of Darwin have C99 functions.  */
 923
 924 #define TARGET_C99_FUNCTIONS 1
 925
 926 #define WINT_TYPE "int"
 927
 928 /* Every program on darwin links against libSystem which contains the pthread
 929    routines, so there's no need to explicitly call out when doing threaded
 930    work.  */
 931
 932 #undef GOMP_SELF_SPECS
 933 #define GOMP_SELF_SPECS ""
 934
 935 /* Darwin can't support anchors until we can cope with the adjustments
 936    to size that ASM_DECLARE_OBJECT_NAME and ASM_DECLARE_CONSTANT_NAME
 937    when outputting members of an anchor block and the linker can be
 938    taught to keep them together or we find some other suitable
 939    code-gen technique.  */
 940
 941 #if 0
 942 #define TARGET_ASM_OUTPUT_ANCHOR darwin_asm_output_anchor
 943 #else
 944 #define TARGET_ASM_OUTPUT_ANCHOR NULL
 945 #endif
 946
 947 /* Attempt to turn on execute permission for the stack.  This may be
 948     used by INITIALIZE_TRAMPOLINE of the target needs it (that is,
 949     if the target machine can change execute permissions on a page).
 950
 951     There is no way to query the execute permission of the stack, so
 952     we always issue the mprotect() call.
 953
 954     Unfortunately it is not possible to make this namespace-clean.
 955
 956     Also note that no errors should be emitted by this code; it is
 957     considered dangerous for library calls to send messages to
 958     stdout/stderr.  */
 959
 960 #define ENABLE_EXECUTE_STACK                                            \
 961 extern void __enable_execute_stack (void *);                            \
 962 void                                                                    \
 963 __enable_execute_stack (void *addr)                                     \
 964 {                                                                       \
 965    extern int mprotect (void *, size_t, int);                           \
 966    extern int getpagesize (void);                                       \
 967    static int size;                                                     \
 968    static long mask;                                                    \
 969                                                                         \
 970    char *page, *end;                                                    \
 971                                                                         \
 972    if (size == 0)                                                       \
 973      {                                                                  \
 974        size = getpagesize();                                            \
 975        mask = ~((long) size - 1);                                       \
 976      }                                                                  \
 977                                                                         \
 978    page = (char *) (((long) addr) & mask);                              \
 979    end  = (char *) ((((long) (addr + (TARGET_64BIT ? 48 : 40))) & mask) + size); \
 980                                                                         \
 981    /* 7 == PROT_READ | PROT_WRITE | PROT_EXEC */                        \
 982    (void) mprotect (page, end - page, 7);                               \
 983 }
 984
 985 /* For Apple KEXTs, we make the constructors return this to match gcc
 986    2.95.  */
 987 #define TARGET_CXX_CDTOR_RETURNS_THIS (darwin_kextabi_p)
 988 extern int flag_mkernel;
 989 extern int flag_apple_kext;
 990 #define TARGET_KEXTABI flag_apple_kext
 991
 992 #define TARGET_HAS_TARGETCM 1
 993
 994 #ifndef CROSS_DIRECTORY_STRUCTURE
 995 extern void darwin_default_min_version (int * argc, char *** argv);
 996 #define GCC_DRIVER_HOST_INITIALIZATION \
 997   darwin_default_min_version (&argc, &argv)
 998 #endif /* CROSS_DIRECTORY_STRUCTURE */
 999
1000 #endif /* CONFIG_DARWIN_H */