gcc/config/darwin.h

   1 /* Target definitions for Darwin (Mac OS X) systems.
   2    Copyright (C) 1989, 1990, 1991, 1992, 1993, 2000, 2001, 2002, 2003, 2004,
   3    2005, 2006, 2007, 2008, 2009, 2010
   4    Free Software Foundation, Inc.
   5    Contributed by Apple Computer Inc.
   6
   7 This file is part of GCC.
   8
   9 GCC is free software; you can redistribute it and/or modify
  10 it under the terms of the GNU General Public License as published by
  11 the Free Software Foundation; either version 3, or (at your option)
  12 any later version.
  13
  14 GCC is distributed in the hope that it will be useful,
  15 but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 GNU General Public License for more details.
  18
  19 Under Section 7 of GPL version 3, you are granted additional
  20 permissions described in the GCC Runtime Library Exception, version
  21 3.1, as published by the Free Software Foundation.
  22
  23 You should have received a copy of the GNU General Public License and
  24 a copy of the GCC Runtime Library Exception along with this program;
  25 see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  26 <http://www.gnu.org/licenses/>.  */
  27
  28 #ifndef CONFIG_DARWIN_H
  29 #define CONFIG_DARWIN_H
  30
  31 /* The definitions in this file are common to all processor types
  32    running Darwin, which is the kernel for Mac OS X.  Darwin is
  33    basically a BSD user layer laid over a Mach kernel, then evolved
  34    for many years (at NeXT) in parallel with other Unix systems.  So
  35    while the runtime is a somewhat idiosyncratic Mach-based thing,
  36    other definitions look like they would for a BSD variant.  */
  37
  38 /* Although NeXT ran on many different architectures, as of Jan 2001
  39    the only supported Darwin targets are PowerPC and x86.  */
  40
  41 /* One of Darwin's NeXT legacies is the Mach-O format, which is partly
  42    like a.out and partly like COFF, with additional features like
  43    multi-architecture binary support.  */
  44
  45 #define DARWIN_X86 0
  46 #define DARWIN_PPC 0
  47
  48 /* Don't assume anything about the header files.  */
  49 #define NO_IMPLICIT_EXTERN_C
  50
  51 /* Suppress g++ attempt to link in the math library automatically. */
  52 #define MATH_LIBRARY ""
  53
  54 /* We have atexit.  */
  55
  56 #define HAVE_ATEXIT
  57
  58 /* Define an empty body for the function do_global_dtors() in libgcc2.c.  */
  59
  60 #define DO_GLOBAL_DTORS_BODY
  61
  62 /* The string value for __SIZE_TYPE__.  */
  63
  64 #ifndef SIZE_TYPE
  65 #define SIZE_TYPE "long unsigned int"
  66 #endif
  67
  68 /* Type used for ptrdiff_t, as a string used in a declaration.  */
  69
  70 #undef  PTRDIFF_TYPE
  71 #define PTRDIFF_TYPE "int"
  72
  73 /* wchar_t is int.  */
  74
  75 #undef  WCHAR_TYPE
  76 #define WCHAR_TYPE "int"
  77 #undef  WCHAR_TYPE_SIZE
  78 #define WCHAR_TYPE_SIZE 32
  79
  80 #define INT8_TYPE "signed char"
  81 #define INT16_TYPE "short int"
  82 #define INT32_TYPE "int"
  83 #define INT64_TYPE "long long int"
  84 #define UINT8_TYPE "unsigned char"
  85 #define UINT16_TYPE "short unsigned int"
  86 #define UINT32_TYPE "unsigned int"
  87 #define UINT64_TYPE "long long unsigned int"
  88
  89 #define INT_LEAST8_TYPE "signed char"
  90 #define INT_LEAST16_TYPE "short int"
  91 #define INT_LEAST32_TYPE "int"
  92 #define INT_LEAST64_TYPE "long long int"
  93 #define UINT_LEAST8_TYPE "unsigned char"
  94 #define UINT_LEAST16_TYPE "short unsigned int"
  95 #define UINT_LEAST32_TYPE "unsigned int"
  96 #define UINT_LEAST64_TYPE "long long unsigned int"
  97
  98 #define INT_FAST8_TYPE "signed char"
  99 #define INT_FAST16_TYPE "short int"
 100 #define INT_FAST32_TYPE "int"
 101 #define INT_FAST64_TYPE "long long int"
 102 #define UINT_FAST8_TYPE "unsigned char"
 103 #define UINT_FAST16_TYPE "short unsigned int"
 104 #define UINT_FAST32_TYPE "unsigned int"
 105 #define UINT_FAST64_TYPE "long long unsigned int"
 106
 107 #define INTPTR_TYPE "long int"
 108 #define UINTPTR_TYPE "long unsigned int"
 109
 110 #define SIG_ATOMIC_TYPE "int"
 111
 112 /* Default to using the NeXT-style runtime, since that's what is
 113    pre-installed on Darwin systems.  */
 114
 115 #define NEXT_OBJC_RUNTIME
 116
 117 /* Don't default to pcc-struct-return, because gcc is the only compiler, and
 118    we want to retain compatibility with older gcc versions.  */
 119
 120 #undef  DEFAULT_PCC_STRUCT_RETURN
 121 #define DEFAULT_PCC_STRUCT_RETURN 0
 122
 123 /* True if pragma ms_struct is in effect.  */
 124 extern GTY(()) int darwin_ms_struct;
 125
 126 #define DRIVER_SELF_SPECS                                       \
 127   "%{gfull:-g -fno-eliminate-unused-debug-symbols} %<gfull",    \
 128   "%{gused:-g -feliminate-unused-debug-symbols} %<gused",       \
 129   "%{fapple-kext|mkernel:-static}",                             \
 130   "%{shared:-Zdynamiclib} %<shared"
 131
 132 #define DARWIN_CC1_SPEC                                                 \
 133   "%{findirect-virtual-calls: -fapple-kext} %<findirect-virtual-calls " \
 134   "%{fterminated-vtables: -fapple-kext} %<fterminated-vtables "         \
 135   "%<filelist* %<framework*"
 136
 137 #define SUBSUBTARGET_OVERRIDE_OPTIONS                                   \
 138   do {                                                                  \
 139     darwin_override_options ();                                         \
 140   } while (0)
 141
 142 #define SUBTARGET_C_COMMON_OVERRIDE_OPTIONS do {                        \
 143     if (flag_mkernel || flag_apple_kext)                                \
 144       {                                                                 \
 145         if (flag_use_cxa_atexit == 2)                                   \
 146           flag_use_cxa_atexit = 0;                                      \
 147         /* kexts should always be built without the coalesced sections  \
 148            because the kernel loader doesn't grok such sections.  */    \
 149         flag_weak = 0;                                                  \
 150         /* No RTTI in kexts.  */                                        \
 151         flag_rtti = 0;                                                  \
 152       }                                                                 \
 153   } while (0)
 154
 155 /* Machine dependent cpp options.  Don't add more options here, add
 156    them to darwin_cpp_builtins in darwin-c.c.  */
 157
 158 #undef  CPP_SPEC
 159 #define CPP_SPEC "%{static:%{!dynamic:-D__STATIC__}}%{!static:-D__DYNAMIC__}" \
 160         " %{pthread:-D_REENTRANT}"
 161
 162 /* This is mostly a clone of the standard LINK_COMMAND_SPEC, plus
 163    precomp, libtool, and fat build additions.
 164
 165    In general, random Darwin linker flags should go into LINK_SPEC
 166    instead of LINK_COMMAND_SPEC.  The command spec is better for
 167    specifying the handling of options understood by generic Unix
 168    linkers, and for positional arguments like libraries.  */
 169
 170 #define LINK_COMMAND_SPEC_A \
 171    "%{!fdump=*:%{!fsyntax-only:%{!c:%{!M:%{!MM:%{!E:%{!S:\
 172     %(linker) \
 173     %{flto*:%<fcompare-debug*} \
 174     %{flto*} \
 175     %l %X %{d} %{s} %{t} %{Z} %{u*} \
 176     %{A} %{e*} %{m} %{r} \
 177     %{o*}%{!o:-o a.out} \
 178     %{!A:%{!nostdlib:%{!nostartfiles:%S}}} \
 179     %{L*} %(link_libgcc) %o %{fprofile-arcs|fprofile-generate*|coverage:-lgcov} \
 180     %{fopenmp|ftree-parallelize-loops=*: \
 181       %{static|static-libgcc|static-libstdc++|static-libgfortran: libgomp.a%s; : -lgomp } } \
 182     %{!nostdlib:%{!nodefaultlibs:\
 183       %(link_ssp) %(link_gcc_c_sequence)\
 184     }}\
 185     %{!A:%{!nostdlib:%{!nostartfiles:%E}}} %{T*} %{F*} }}}}}}}"
 186
 187 #define DSYMUTIL "\ndsymutil"
 188
 189 #define DSYMUTIL_SPEC \
 190    "%{!fdump=*:%{!fsyntax-only:%{!c:%{!M:%{!MM:%{!E:%{!S:\
 191     %{.c|.cc|.C|.cpp|.cp|.c++|.cxx|.CPP|.m|.mm: \
 192     %{gdwarf-2:%{!gstabs*:%{!g0: " DSYMUTIL " %{o*:%*}%{!o:a.out}}}}}}}}}}}}"
 193
 194 #define LINK_COMMAND_SPEC LINK_COMMAND_SPEC_A DSYMUTIL_SPEC
 195
 196 /* We only want one instance of %G, since libSystem (Darwin's -lc) does not depend
 197    on libgcc.  */
 198 #undef  LINK_GCC_C_SEQUENCE_SPEC
 199 #define LINK_GCC_C_SEQUENCE_SPEC "%G %L"
 200
 201 #ifdef TARGET_SYSTEM_ROOT
 202 #define LINK_SYSROOT_SPEC \
 203   "%{isysroot*:-syslibroot %*;:-syslibroot " TARGET_SYSTEM_ROOT "}"
 204 #else
 205 #define LINK_SYSROOT_SPEC "%{isysroot*:-syslibroot %*}"
 206 #endif
 207
 208 /* Please keep the random linker options in alphabetical order (modulo
 209    'Z' and 'no' prefixes). Note that options taking arguments may appear
 210    multiple times on a command line with different arguments each time,
 211    so put a * after their names so all of them get passed.  */
 212 #define LINK_SPEC  \
 213   "%{static}%{!static:-dynamic} \
 214    %:remove-outfile(-ldl) \
 215    %:remove-outfile(-lm) \
 216    %:remove-outfile(-lpthread) \
 217    %{fgnu-runtime: %{static|static-libgcc: \
 218                      %:replace-outfile(-lobjc libobjc-gnu.a%s); \
 219                     :%:replace-outfile(-lobjc -lobjc-gnu ) } }\
 220    %{static|static-libgcc|static-libgfortran:%:replace-outfile(-lgfortran libgfortran.a%s)}\
 221    %{static|static-libgcc|static-libstdc++|static-libgfortran:%:replace-outfile(-lgomp libgomp.a%s)}\
 222    %{static|static-libgcc|static-libstdc++:%:replace-outfile(-lstdc++ libstdc++.a%s)}\
 223    %{!Zdynamiclib: \
 224      %{Zforce_cpusubtype_ALL:-arch %(darwin_arch) -force_cpusubtype_ALL} \
 225      %{!Zforce_cpusubtype_ALL:-arch %(darwin_subarch)} \
 226      %{Zbundle:-bundle} \
 227      %{Zbundle_loader*:-bundle_loader %*} \
 228      %{client_name*} \
 229      %{compatibility_version*:%e-compatibility_version only allowed with -dynamiclib\
 230 } \
 231      %{current_version*:%e-current_version only allowed with -dynamiclib} \
 232      %{Zforce_flat_namespace:-force_flat_namespace} \
 233      %{Zinstall_name*:%e-install_name only allowed with -dynamiclib} \
 234      %{keep_private_externs} \
 235      %{private_bundle} \
 236     } \
 237    %{Zdynamiclib: -dylib \
 238      %{Zbundle:%e-bundle not allowed with -dynamiclib} \
 239      %{Zbundle_loader*:%e-bundle_loader not allowed with -dynamiclib} \
 240      %{client_name*:%e-client_name not allowed with -dynamiclib} \
 241      %{compatibility_version*:-dylib_compatibility_version %*} \
 242      %{current_version*:-dylib_current_version %*} \
 243      %{Zforce_cpusubtype_ALL:-arch %(darwin_arch)} \
 244      %{!Zforce_cpusubtype_ALL: -arch %(darwin_subarch)} \
 245      %{Zforce_flat_namespace:%e-force_flat_namespace not allowed with -dynamiclib} \
 246      %{Zinstall_name*:-dylib_install_name %*} \
 247      %{keep_private_externs:%e-keep_private_externs not allowed with -dynamiclib} \
 248      %{private_bundle:%e-private_bundle not allowed with -dynamiclib} \
 249     } \
 250    %{Zall_load:-all_load} \
 251    %{Zallowable_client*:-allowable_client %*} \
 252    %{Zbind_at_load:-bind_at_load} \
 253    %{Zarch_errors_fatal:-arch_errors_fatal} \
 254    %{Zdead_strip:-dead_strip} \
 255    %{Zno_dead_strip_inits_and_terms:-no_dead_strip_inits_and_terms} \
 256    %{Zdylib_file*:-dylib_file %*} \
 257    %{Zdynamic:-dynamic}\
 258    %{Zexported_symbols_list*:-exported_symbols_list %*} \
 259    %{Zflat_namespace:-flat_namespace} \
 260    %{headerpad_max_install_names*} \
 261    %{Zimage_base*:-image_base %*} \
 262    %{Zinit*:-init %*} \
 263    %{!mmacosx-version-min=*:-macosx_version_min %(darwin_minversion)} \
 264    %{mmacosx-version-min=*:-macosx_version_min %*} \
 265    %{nomultidefs} \
 266    %{Zmulti_module:-multi_module} %{Zsingle_module:-single_module} \
 267    %{Zmultiply_defined*:-multiply_defined %*} \
 268    %{!Zmultiply_defined*:%{shared-libgcc: \
 269      %:version-compare(< 10.5 mmacosx-version-min= -multiply_defined) \
 270      %:version-compare(< 10.5 mmacosx-version-min= suppress)}} \
 271    %{Zmultiplydefinedunused*:-multiply_defined_unused %*} \
 272    %{fpie:-pie} \
 273    %{prebind} %{noprebind} %{nofixprebinding} %{prebind_all_twolevel_modules} \
 274    %{read_only_relocs} \
 275    %{sectcreate*} %{sectorder*} %{seg1addr*} %{segprot*} \
 276    %{Zsegaddr*:-segaddr %*} \
 277    %{Zsegs_read_only_addr*:-segs_read_only_addr %*} \
 278    %{Zsegs_read_write_addr*:-segs_read_write_addr %*} \
 279    %{Zseg_addr_table*: -seg_addr_table %*} \
 280    %{Zfn_seg_addr_table_filename*:-seg_addr_table_filename %*} \
 281    %{sub_library*} %{sub_umbrella*} \
 282    " LINK_SYSROOT_SPEC " \
 283    %{twolevel_namespace} %{twolevel_namespace_hints} \
 284    %{Zumbrella*: -umbrella %*} \
 285    %{undefined*} \
 286    %{Zunexported_symbols_list*:-unexported_symbols_list %*} \
 287    %{Zweak_reference_mismatches*:-weak_reference_mismatches %*} \
 288    %{!Zweak_reference_mismatches*:-weak_reference_mismatches non-weak} \
 289    %{X} \
 290    %{y*} \
 291    %{w} \
 292    %{pagezero_size*} %{segs_read_*} %{seglinkedit} %{noseglinkedit}  \
 293    %{sectalign*} %{sectobjectsymbols*} %{segcreate*} %{whyload} \
 294    %{whatsloaded} %{dylinker_install_name*} \
 295    %{dylinker} %{Mach} "
 296
 297
 298 /* Machine dependent libraries.  */
 299
 300 #define LIB_SPEC "%{!static:-lSystem}"
 301
 302 /* Support -mmacosx-version-min by supplying different (stub) libgcc_s.dylib
 303    libraries to link against, and by not linking against libgcc_s on
 304    earlier-than-10.3.9.
 305
 306    Note that by default, -lgcc_eh is not linked against!  This is
 307    because in a future version of Darwin the EH frame information may
 308    be in a new format, or the fallback routine might be changed; if
 309    you want to explicitly link against the static version of those
 310    routines, because you know you don't need to unwind through system
 311    libraries, you need to explicitly say -static-libgcc.
 312
 313    If it is linked against, it has to be before -lgcc, because it may
 314    need symbols from -lgcc.  */
 315 #undef REAL_LIBGCC_SPEC
 316 #define REAL_LIBGCC_SPEC                                                   \
 317    "%{static-libgcc|static: -lgcc_eh -lgcc;                                \
 318       shared-libgcc|fexceptions|fgnu-runtime:                              \
 319        %:version-compare(!> 10.5 mmacosx-version-min= -lgcc_s.10.4)        \
 320        %:version-compare(>< 10.5 10.6 mmacosx-version-min= -lgcc_s.10.5)   \
 321        %:version-compare(!> 10.5 mmacosx-version-min= -lgcc_ext.10.4)      \
 322        %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_ext.10.5)      \
 323        -lgcc ;                                                             \
 324       :%:version-compare(>< 10.3.9 10.5 mmacosx-version-min= -lgcc_s.10.4) \
 325        %:version-compare(>< 10.5 10.6 mmacosx-version-min= -lgcc_s.10.5)   \
 326        %:version-compare(!> 10.5 mmacosx-version-min= -lgcc_ext.10.4)      \
 327        %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_ext.10.5)      \
 328        -lgcc }"
 329
 330 /* We specify crt0.o as -lcrt0.o so that ld will search the library path.
 331
 332    crt3.o provides __cxa_atexit on systems that don't have it.  Since
 333    it's only used with C++, which requires passing -shared-libgcc, key
 334    off that to avoid unnecessarily adding a destructor to every
 335    powerpc program built.  */
 336
 337 #undef  STARTFILE_SPEC
 338 #define STARTFILE_SPEC                                                      \
 339   "%{Zdynamiclib: %(darwin_dylib1) }                                        \
 340    %{!Zdynamiclib:%{Zbundle:%{!static:-lbundle1.o}}                         \
 341      %{!Zbundle:%{pg:%{static:-lgcrt0.o}                                    \
 342                      %{!static:%{object:-lgcrt0.o}                          \
 343                                %{!object:%{preload:-lgcrt0.o}               \
 344                                  %{!preload:-lgcrt1.o %(darwin_crt2)}}}}    \
 345                 %{!pg:%{static:-lcrt0.o}                                    \
 346                       %{!static:%{object:-lcrt0.o}                          \
 347                                 %{!object:%{preload:-lcrt0.o}               \
 348                                   %{!preload: %(darwin_crt1)                \
 349                                               %(darwin_crt2)}}}}}}          \
 350   %{shared-libgcc:%:version-compare(< 10.5 mmacosx-version-min= crt3.o%s)}"
 351
 352 /* The native Darwin linker doesn't necessarily place files in the order
 353    that they're specified on the link line.  Thus, it is pointless
 354    to put anything in ENDFILE_SPEC.  */
 355 /* #define ENDFILE_SPEC "" */
 356
 357 #define DARWIN_EXTRA_SPECS                                              \
 358   { "darwin_crt1", DARWIN_CRT1_SPEC },                                  \
 359   { "darwin_dylib1", DARWIN_DYLIB1_SPEC },                              \
 360   { "darwin_minversion", DARWIN_MINVERSION_SPEC },
 361
 362 #define DARWIN_DYLIB1_SPEC                                              \
 363   "%:version-compare(!> 10.5 mmacosx-version-min= -ldylib1.o)           \
 364    %:version-compare(>= 10.5 mmacosx-version-min= -ldylib1.10.5.o)"
 365
 366 #define DARWIN_CRT1_SPEC                                                \
 367   "%:version-compare(!> 10.5 mmacosx-version-min= -lcrt1.o)             \
 368    %:version-compare(>= 10.5 mmacosx-version-min= -lcrt1.10.5.o)"
 369
 370 /* Default Darwin ASM_SPEC, very simple.  */
 371 #define ASM_SPEC "-arch %(darwin_arch) \
 372   %{Zforce_cpusubtype_ALL:-force_cpusubtype_ALL} \
 373   %{static}"
 374
 375 /* We still allow output of STABS.  */
 376
 377 #define DBX_DEBUGGING_INFO 1
 378
 379 #define DWARF2_DEBUGGING_INFO 1
 380 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
 381
 382 #define DEBUG_FRAME_SECTION     "__DWARF,__debug_frame,regular,debug"
 383 #define DEBUG_INFO_SECTION      "__DWARF,__debug_info,regular,debug"
 384 #define DEBUG_ABBREV_SECTION    "__DWARF,__debug_abbrev,regular,debug"
 385 #define DEBUG_ARANGES_SECTION   "__DWARF,__debug_aranges,regular,debug"
 386 #define DEBUG_MACINFO_SECTION   "__DWARF,__debug_macinfo,regular,debug"
 387 #define DEBUG_LINE_SECTION      "__DWARF,__debug_line,regular,debug"
 388 #define DEBUG_LOC_SECTION       "__DWARF,__debug_loc,regular,debug"
 389 #define DEBUG_PUBNAMES_SECTION  "__DWARF,__debug_pubnames,regular,debug"
 390 #define DEBUG_PUBTYPES_SECTION  "__DWARF,__debug_pubtypes,regular,debug"
 391 #define DEBUG_STR_SECTION       "__DWARF,__debug_str,regular,debug"
 392 #define DEBUG_RANGES_SECTION    "__DWARF,__debug_ranges,regular,debug"
 393
 394 #define TARGET_WANT_DEBUG_PUB_SECTIONS true
 395
 396 /* When generating stabs debugging, use N_BINCL entries.  */
 397
 398 #define DBX_USE_BINCL
 399
 400 /* There is no limit to the length of stabs strings.  */
 401
 402 #define DBX_CONTIN_LENGTH 0
 403
 404 /* gdb needs a null N_SO at the end of each file for scattered loading.  */
 405
 406 #define DBX_OUTPUT_NULL_N_SO_AT_MAIN_SOURCE_FILE_END
 407
 408 /* GCC's definition of 'one_only' is the same as its definition of 'weak'.  */
 409 #define MAKE_DECL_ONE_ONLY(DECL) (DECL_WEAK (DECL) = 1)
 410
 411 /* Mach-O supports 'weak imports', and 'weak definitions' in coalesced
 412    sections.  machopic_select_section ensures that weak variables go in
 413    coalesced sections.  Weak aliases (or any other kind of aliases) are
 414    not supported.  Weak symbols that aren't visible outside the .s file
 415    are not supported.  */
 416 #define ASM_WEAKEN_DECL(FILE, DECL, NAME, ALIAS)                        \
 417   do {                                                                  \
 418     if (ALIAS)                                                          \
 419       {                                                                 \
 420         warning (0, "alias definitions not supported in Mach-O; ignored");      \
 421         break;                                                          \
 422       }                                                                 \
 423                                                                         \
 424     if (! DECL_EXTERNAL (DECL) && TREE_PUBLIC (DECL))                   \
 425       targetm.asm_out.globalize_label (FILE, NAME);                     \
 426     if (DECL_EXTERNAL (DECL))                                           \
 427       fputs ("\t.weak_reference ", FILE);                               \
 428     else if (lookup_attribute ("weak_import", DECL_ATTRIBUTES (DECL)))  \
 429       break;                                                            \
 430     else if (TREE_PUBLIC (DECL))                                        \
 431       fputs ("\t.weak_definition ", FILE);                              \
 432     else                                                                \
 433       break;                                                            \
 434     assemble_name (FILE, NAME);                                         \
 435     fputc ('\n', FILE);                                                 \
 436   } while (0)
 437
 438 /* Darwin has the pthread routines in libSystem, which every program
 439    links to, so there's no need for weak-ness for that.  */
 440 #define GTHREAD_USE_WEAK 0
 441
 442 /* The Darwin linker imposes two limitations on common symbols: they
 443    can't have hidden visibility, and they can't appear in dylibs.  As
 444    a consequence, we should never use common symbols to represent
 445    vague linkage. */
 446 #undef USE_COMMON_FOR_ONE_ONLY
 447 #define USE_COMMON_FOR_ONE_ONLY 0
 448
 449 /* The Darwin linker doesn't want coalesced symbols to appear in
 450    a static archive's table of contents. */
 451 #undef TARGET_WEAK_NOT_IN_ARCHIVE_TOC
 452 #define TARGET_WEAK_NOT_IN_ARCHIVE_TOC 1
 453
 454 /* On Darwin, we don't (at the time of writing) have linkonce sections
 455    with names, so it's safe to make the class data not comdat.  */
 456 #define TARGET_CXX_CLASS_DATA_ALWAYS_COMDAT hook_bool_void_false
 457
 458 /* For efficiency, on Darwin the RTTI information that is always
 459    emitted in the standard C++ library should not be COMDAT.  */
 460 #define TARGET_CXX_LIBRARY_RTTI_COMDAT hook_bool_void_false
 461
 462 /* We make exception information linkonce. */
 463 #undef TARGET_USES_WEAK_UNWIND_INFO
 464 #define TARGET_USES_WEAK_UNWIND_INFO 1
 465
 466 /* We need to use a nonlocal label for the start of an EH frame: the
 467    Darwin linker requires that a coalesced section start with a label.
 468    Unfortunately, it also requires that 'debug' sections don't contain
 469    labels.  */
 470 #undef FRAME_BEGIN_LABEL
 471 #define FRAME_BEGIN_LABEL (for_eh ? "EH_frame" : "Lframe")
 472
 473 /* Emit a label for the FDE corresponding to DECL.  EMPTY means
 474    emit a label for an empty FDE. */
 475 #define TARGET_ASM_EMIT_UNWIND_LABEL darwin_emit_unwind_label
 476
 477 /* Emit a label to separate the exception table.  */
 478 #define TARGET_ASM_EMIT_EXCEPT_TABLE_LABEL darwin_emit_except_table_label
 479
 480 /* Our profiling scheme doesn't LP labels and counter words.  */
 481
 482 #define NO_PROFILE_COUNTERS     1
 483
 484 #undef  INIT_SECTION_ASM_OP
 485 #define INIT_SECTION_ASM_OP
 486
 487 #undef  INVOKE__main
 488
 489 #define TARGET_ASM_CONSTRUCTOR  machopic_asm_out_constructor
 490 #define TARGET_ASM_DESTRUCTOR   machopic_asm_out_destructor
 491
 492 /* Always prefix with an underscore.  */
 493
 494 #define USER_LABEL_PREFIX "_"
 495
 496 /* A dummy symbol that will be replaced with the function base name.  */
 497 #define MACHOPIC_FUNCTION_BASE_NAME "<pic base>"
 498
 499 /* Don't output a .file directive.  That is only used by the assembler for
 500    error reporting.  */
 501 #undef  TARGET_ASM_FILE_START_FILE_DIRECTIVE
 502 #define TARGET_ASM_FILE_START_FILE_DIRECTIVE false
 503
 504 #undef  TARGET_ASM_FILE_END
 505 #define TARGET_ASM_FILE_END darwin_file_end
 506
 507 /* Because Mach-O relocations have a counter from 1 to 255 for the
 508    section number they apply to, it is necessary to output all
 509    normal sections before the LTO sections, to make sure that the
 510    sections that may have relocations always have a section number
 511    smaller than 255.  */
 512 #undef  TARGET_ASM_LTO_START
 513 #define TARGET_ASM_LTO_START darwin_asm_lto_start
 514 #undef  TARGET_ASM_LTO_END
 515 #define TARGET_ASM_LTO_END darwin_asm_lto_end
 516
 517 #define ASM_OUTPUT_SKIP(FILE,SIZE)  \
 518   fprintf (FILE, "\t.space "HOST_WIDE_INT_PRINT_UNSIGNED"\n", SIZE)
 519
 520 /* Give ObjC methods pretty symbol names.  */
 521
 522 #undef  OBJC_GEN_METHOD_LABEL
 523 #define OBJC_GEN_METHOD_LABEL(BUF,IS_INST,CLASS_NAME,CAT_NAME,SEL_NAME,NUM) \
 524   do { if (CAT_NAME)                                                    \
 525          sprintf (BUF, "%c[%s(%s) %s]", (IS_INST) ? '-' : '+',          \
 526                   (CLASS_NAME), (CAT_NAME), (SEL_NAME));                \
 527        else                                                             \
 528          sprintf (BUF, "%c[%s %s]", (IS_INST) ? '-' : '+',              \
 529                   (CLASS_NAME), (SEL_NAME));                            \
 530      } while (0)
 531
 532 /* The RTTI data (e.g., __ti4name) is common and public (and static),
 533    but it does need to be referenced via indirect PIC data pointers.
 534    The machopic_define_symbol calls are telling the machopic subsystem
 535    that the name *is* defined in this module, so it doesn't need to
 536    make them indirect.  */
 537
 538 #undef ASM_DECLARE_OBJECT_NAME
 539 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL)                       \
 540   do {                                                                  \
 541     const char *xname = NAME;                                           \
 542     if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF)             \
 543       xname = IDENTIFIER_POINTER (DECL_NAME (DECL));                    \
 544     if (! DECL_WEAK (DECL)                                              \
 545         && ((TREE_STATIC (DECL)                                         \
 546              && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))           \
 547             || DECL_INITIAL (DECL)))                                    \
 548         machopic_define_symbol (DECL_RTL (DECL));                       \
 549     if ((TREE_STATIC (DECL)                                             \
 550          && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))               \
 551         || DECL_INITIAL (DECL))                                         \
 552       (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false);   \
 553     ASM_OUTPUT_LABEL (FILE, xname);                                     \
 554     /* Darwin doesn't support zero-size objects, so give them a         \
 555        byte.  */                                                        \
 556     if (tree_low_cst (DECL_SIZE_UNIT (DECL), 1) == 0)                   \
 557       assemble_zeros (1);                                               \
 558   } while (0)
 559
 560 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL)                     \
 561   do {                                                                  \
 562     const char *xname = NAME;                                           \
 563     if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF)             \
 564       xname = IDENTIFIER_POINTER (DECL_NAME (DECL));                    \
 565     if (! DECL_WEAK (DECL)                                              \
 566         && ((TREE_STATIC (DECL)                                         \
 567              && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))           \
 568             || DECL_INITIAL (DECL)))                                    \
 569         machopic_define_symbol (DECL_RTL (DECL));                       \
 570     if ((TREE_STATIC (DECL)                                             \
 571          && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))               \
 572         || DECL_INITIAL (DECL))                                         \
 573       (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false);   \
 574     ASM_OUTPUT_FUNCTION_LABEL (FILE, xname, DECL);                      \
 575   } while (0)
 576
 577 #undef TARGET_ASM_DECLARE_CONSTANT_NAME
 578 #define TARGET_ASM_DECLARE_CONSTANT_NAME darwin_asm_declare_constant_name
 579
 580 /* Wrap new method names in quotes so the assembler doesn't gag.
 581    Make Objective-C internal symbols local and in doing this, we need
 582    to accommodate the name mangling done by c++ on file scope locals.  */
 583
 584
 585 int darwin_label_is_anonymous_local_objc_name (const char *name);
 586
 587 #undef  ASM_OUTPUT_LABELREF
 588 #define ASM_OUTPUT_LABELREF(FILE,NAME)                                       \
 589   do {                                                                       \
 590        const char *xname = (NAME);                                           \
 591        if (! strcmp (xname, MACHOPIC_FUNCTION_BASE_NAME))                    \
 592          machopic_output_function_base_name(FILE);                           \
 593        else if (xname[0] == '&' || xname[0] == '*')                          \
 594          {                                                                   \
 595            int len = strlen (xname);                                         \
 596            if (len > 6 && !strcmp ("$stub", xname + len - 5))                \
 597              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 598            else if (len > 7 && !strcmp ("$stub\"", xname + len - 6))         \
 599              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 600            else if (len > 14 && !strcmp ("$non_lazy_ptr", xname + len - 13)) \
 601              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 602            else if (len > 15 && !strcmp ("$non_lazy_ptr\"", xname + len - 14)) \
 603              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 604            if (xname[1] != '"' && name_needs_quotes (&xname[1]))             \
 605              fprintf (FILE, "\"%s\"", &xname[1]);                            \
 606            else                                                              \
 607              fputs (&xname[1], FILE);                                        \
 608          }                                                                   \
 609        else if (xname[0] == '+' || xname[0] == '-')                          \
 610          fprintf (FILE, "\"%s\"", xname);                                    \
 611        else if (darwin_label_is_anonymous_local_objc_name (xname))                                   \
 612          fprintf (FILE, "L%s", xname);                                       \
 613        else if (!strncmp (xname, ".objc_class_name_", 17))                   \
 614          fprintf (FILE, "%s", xname);                                        \
 615        else if (xname[0] != '"' && name_needs_quotes (xname))                \
 616          fprintf (FILE, "\"%s\"", xname);                                    \
 617        else                                                                  \
 618          asm_fprintf (FILE, "%U%s", xname);                                  \
 619   } while (0)
 620
 621 /* Output before executable code.  */
 622 #undef TEXT_SECTION_ASM_OP
 623 #define TEXT_SECTION_ASM_OP "\t.text"
 624
 625 /* Output before writable data.  */
 626
 627 #undef DATA_SECTION_ASM_OP
 628 #define DATA_SECTION_ASM_OP "\t.data"
 629
 630 #undef  ALIGN_ASM_OP
 631 #define ALIGN_ASM_OP            ".align"
 632
 633 #undef  ASM_OUTPUT_ALIGN
 634 #define ASM_OUTPUT_ALIGN(FILE,LOG)      \
 635   if ((LOG) != 0)                       \
 636     fprintf (FILE, "\t%s %d\n", ALIGN_ASM_OP, (LOG))
 637
 638 /* Ensure correct alignment of bss data.  */
 639
 640 #undef  ASM_OUTPUT_ALIGNED_DECL_LOCAL
 641 #define ASM_OUTPUT_ALIGNED_DECL_LOCAL(FILE, DECL, NAME, SIZE, ALIGN)    \
 642   do {                                                                  \
 643     unsigned HOST_WIDE_INT _new_size = SIZE;                            \
 644     fputs ("\t.lcomm ", (FILE));                                                \
 645     assemble_name ((FILE), (NAME));                                     \
 646     if (_new_size == 0) _new_size = 1;                                  \
 647     fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED",%u\n", _new_size, \
 648              floor_log2 ((ALIGN) / BITS_PER_UNIT));                     \
 649     if ((DECL) && ((TREE_STATIC (DECL)                                  \
 650          && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))               \
 651         || DECL_INITIAL (DECL)))                                        \
 652       {                                                                 \
 653         (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false); \
 654         machopic_define_symbol (DECL_RTL (DECL));                       \
 655       }                                                                 \
 656   } while (0)
 657
 658 /* The maximum alignment which the object file format can support in
 659    bits.  For Mach-O, this is 2^15 bytes.  */
 660
 661 #undef  MAX_OFILE_ALIGNMENT
 662 #define MAX_OFILE_ALIGNMENT (0x8000 * 8)
 663
 664 /* The generic version, archs should over-ride where required.  */
 665 #define MACHOPIC_NL_SYMBOL_PTR_SECTION ".non_lazy_symbol_pointer"
 666
 667 /* These are used by -fbranch-probabilities */
 668 #define HOT_TEXT_SECTION_NAME "__TEXT,__text,regular,pure_instructions"
 669 #define UNLIKELY_EXECUTED_TEXT_SECTION_NAME \
 670                               "__TEXT,__unlikely,regular,pure_instructions"
 671
 672 /* Declare the section variables.  */
 673 #ifndef USED_FOR_TARGET
 674 enum darwin_section_enum {
 675 #define DEF_SECTION(NAME, FLAGS, DIRECTIVE, OBJC) NAME,
 676 #include "darwin-sections.def"
 677 #undef DEF_SECTION
 678   NUM_DARWIN_SECTIONS
 679 };
 680 extern GTY(()) section * darwin_sections[NUM_DARWIN_SECTIONS];
 681 #endif
 682
 683 #undef  TARGET_ASM_SELECT_SECTION
 684 #define TARGET_ASM_SELECT_SECTION machopic_select_section
 685 #define USE_SELECT_SECTION_FOR_FUNCTIONS
 686
 687 #undef  TARGET_ASM_SELECT_RTX_SECTION
 688 #define TARGET_ASM_SELECT_RTX_SECTION machopic_select_rtx_section
 689 #undef  TARGET_ASM_UNIQUE_SECTION
 690 #define TARGET_ASM_UNIQUE_SECTION darwin_unique_section
 691 #undef  TARGET_ASM_FUNCTION_RODATA_SECTION
 692 #define TARGET_ASM_FUNCTION_RODATA_SECTION default_no_function_rodata_section
 693 #undef  TARGET_ASM_RELOC_RW_MASK
 694 #define TARGET_ASM_RELOC_RW_MASK machopic_reloc_rw_mask
 695
 696
 697 #define ASM_DECLARE_UNRESOLVED_REFERENCE(FILE,NAME)                     \
 698     do {                                                                \
 699          if (FILE) {                                                    \
 700            if (MACHOPIC_INDIRECT)                                       \
 701              fprintf (FILE, "\t.lazy_reference ");                      \
 702            else                                                         \
 703              fprintf (FILE, "\t.reference ");                           \
 704            assemble_name (FILE, NAME);                                  \
 705            fprintf (FILE, "\n");                                        \
 706          }                                                              \
 707        } while (0)
 708
 709 #define ASM_DECLARE_CLASS_REFERENCE(FILE,NAME)                          \
 710     do {                                                                \
 711          if (FILE) {                                                    \
 712            fprintf (FILE, "\t");                                        \
 713            assemble_name (FILE, NAME);                                  \
 714            fprintf (FILE, "=0\n");                                      \
 715            (*targetm.asm_out.globalize_label) (FILE, NAME);             \
 716          }                                                              \
 717        } while (0)
 718
 719 /* Globalizing directive for a label.  */
 720 #define GLOBAL_ASM_OP "\t.globl "
 721 #define TARGET_ASM_GLOBALIZE_LABEL darwin_globalize_label
 722
 723 /* Emit an assembler directive to set visibility for a symbol.  Used
 724    to support visibility attribute and Darwin's private extern
 725    feature.  */
 726 #undef TARGET_ASM_ASSEMBLE_VISIBILITY
 727 #define TARGET_ASM_ASSEMBLE_VISIBILITY darwin_assemble_visibility
 728
 729 /* Extra attributes for Darwin.  */
 730 #define SUBTARGET_ATTRIBUTE_TABLE                                            \
 731   /* { name, min_len, max_len, decl_req, type_req, fn_type_req, handler } */ \
 732   { "apple_kext_compatibility", 0, 0, false, true, false,                    \
 733     darwin_handle_kext_attribute },                                          \
 734   { "weak_import", 0, 0, true, false, false,                                 \
 735     darwin_handle_weak_import_attribute }
 736
 737 #undef ASM_GENERATE_INTERNAL_LABEL
 738 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM)   \
 739   sprintf (LABEL, "*%s%ld", PREFIX, (long)(NUM))
 740
 741 #undef TARGET_ASM_MARK_DECL_PRESERVED
 742 #define TARGET_ASM_MARK_DECL_PRESERVED darwin_mark_decl_preserved
 743
 744 /* Set on a symbol with SYMBOL_FLAG_FUNCTION or
 745    MACHO_SYMBOL_FLAG_VARIABLE to indicate that the function or
 746    variable has been defined in this translation unit.
 747    When porting Mach-O to new architectures you need to make
 748    sure these aren't clobbered by the backend.  */
 749
 750 #define MACHO_SYMBOL_FLAG_VARIABLE (SYMBOL_FLAG_MACH_DEP)
 751 #define MACHO_SYMBOL_FLAG_DEFINED ((SYMBOL_FLAG_MACH_DEP) << 1)
 752
 753 /* Set on a symbol to indicate when fix-and-continue style code
 754    generation is being used and the symbol refers to a static symbol
 755    that should be rebound from new instances of a translation unit to
 756    the original instance of the data.  */
 757
 758 #define MACHO_SYMBOL_STATIC ((SYMBOL_FLAG_MACH_DEP) << 2)
 759
 760 /* Symbolic names for various things we might know about a symbol.  */
 761
 762 enum machopic_addr_class {
 763   MACHOPIC_UNDEFINED,
 764   MACHOPIC_DEFINED_DATA,
 765   MACHOPIC_UNDEFINED_DATA,
 766   MACHOPIC_DEFINED_FUNCTION,
 767   MACHOPIC_UNDEFINED_FUNCTION
 768 };
 769
 770 /* Macros defining the various PIC cases.  */
 771
 772 #undef  MACHO_DYNAMIC_NO_PIC_P
 773 #define MACHO_DYNAMIC_NO_PIC_P  (TARGET_MACHO_DYNAMIC_NO_PIC)
 774 #undef  MACHOPIC_INDIRECT
 775 #define MACHOPIC_INDIRECT       (flag_pic || MACHO_DYNAMIC_NO_PIC_P)
 776 #define MACHOPIC_JUST_INDIRECT  (MACHO_DYNAMIC_NO_PIC_P)
 777 #undef  MACHOPIC_PURE
 778 #define MACHOPIC_PURE           (flag_pic && ! MACHO_DYNAMIC_NO_PIC_P)
 779
 780 #undef TARGET_ENCODE_SECTION_INFO
 781 #define TARGET_ENCODE_SECTION_INFO  darwin_encode_section_info
 782 #undef TARGET_STRIP_NAME_ENCODING
 783 #define TARGET_STRIP_NAME_ENCODING  default_strip_name_encoding
 784
 785 #define GEN_BINDER_NAME_FOR_STUB(BUF,STUB,STUB_LENGTH)          \
 786   do {                                                          \
 787     const char *const stub_ = (STUB);                           \
 788     char *buffer_ = (BUF);                                      \
 789     strcpy (buffer_, stub_);                                    \
 790     if (stub_[0] == '"')                                        \
 791       {                                                         \
 792         strcpy (buffer_ + (STUB_LENGTH) - 1, "_binder\"");      \
 793       }                                                         \
 794     else                                                        \
 795       {                                                         \
 796         strcpy (buffer_ + (STUB_LENGTH), "_binder");            \
 797       }                                                         \
 798   } while (0)
 799
 800 #define GEN_SYMBOL_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH)    \
 801   do {                                                          \
 802     const char *const symbol_ = (SYMBOL);                       \
 803     char *buffer_ = (BUF);                                      \
 804     if (name_needs_quotes (symbol_) && symbol_[0] != '"')       \
 805       {                                                         \
 806           sprintf (buffer_, "\"%s\"", symbol_);                 \
 807       }                                                         \
 808     else                                                        \
 809       {                                                         \
 810         strcpy (buffer_, symbol_);                              \
 811       }                                                         \
 812   } while (0)
 813
 814 /* Given a symbol name string, create the lazy pointer version
 815    of the symbol name.  */
 816
 817 #define GEN_LAZY_PTR_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH)  \
 818   do {                                                          \
 819     const char *symbol_ = (SYMBOL);                             \
 820     char *buffer_ = (BUF);                                      \
 821     if (symbol_[0] == '"')                                      \
 822       {                                                         \
 823         strcpy (buffer_, "\"L");                                \
 824         strcpy (buffer_ + 2, symbol_ + 1);                      \
 825         strcpy (buffer_ + (SYMBOL_LENGTH), "$lazy_ptr\"");      \
 826       }                                                         \
 827     else if (name_needs_quotes (symbol_))                       \
 828       {                                                         \
 829         strcpy (buffer_, "\"L");                                \
 830         strcpy (buffer_ + 2, symbol_);                          \
 831         strcpy (buffer_ + (SYMBOL_LENGTH) + 2, "$lazy_ptr\"");  \
 832       }                                                         \
 833     else                                                        \
 834       {                                                         \
 835         strcpy (buffer_, "L");                                  \
 836         strcpy (buffer_ + 1, symbol_);                          \
 837         strcpy (buffer_ + (SYMBOL_LENGTH) + 1, "$lazy_ptr");    \
 838       }                                                         \
 839   } while (0)
 840
 841 #define EH_FRAME_SECTION_NAME   "__TEXT"
 842 #define EH_FRAME_SECTION_ATTR ",coalesced,no_toc+strip_static_syms+live_support"
 843
 844 /* Java runtime class list.  */
 845 #define JCR_SECTION_NAME "__DATA,jcr,regular,no_dead_strip"
 846
 847 #undef ASM_PREFERRED_EH_DATA_FORMAT
 848 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL)  \
 849   (((CODE) == 2 && (GLOBAL) == 1) \
 850    ? (DW_EH_PE_pcrel | DW_EH_PE_indirect | DW_EH_PE_sdata4) : \
 851      ((CODE) == 1 || (GLOBAL) == 0) ? DW_EH_PE_pcrel : DW_EH_PE_absptr)
 852
 853 #define ASM_OUTPUT_DWARF_DELTA(FILE,SIZE,LABEL1,LABEL2)  \
 854   darwin_asm_output_dwarf_delta (FILE, SIZE, LABEL1, LABEL2)
 855
 856 #define ASM_OUTPUT_DWARF_OFFSET(FILE,SIZE,LABEL,BASE)  \
 857   darwin_asm_output_dwarf_offset (FILE, SIZE, LABEL, BASE)
 858
 859 #define ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX(ASM_OUT_FILE, ENCODING, SIZE, ADDR, DONE)     \
 860       if (ENCODING == ASM_PREFERRED_EH_DATA_FORMAT (2, 1)) {                            \
 861         darwin_non_lazy_pcrel (ASM_OUT_FILE, ADDR);                                     \
 862         goto DONE;                                                                      \
 863       }
 864
 865 /* Experimentally, putting jump tables in text is faster on SPEC.
 866    Also this is needed for correctness for coalesced functions.  */
 867
 868 #ifndef JUMP_TABLES_IN_TEXT_SECTION
 869 #define JUMP_TABLES_IN_TEXT_SECTION 1
 870 #endif
 871
 872 #define TARGET_TERMINATE_DW2_EH_FRAME_INFO false
 873
 874 #define TARGET_ASM_INIT_SECTIONS darwin_init_sections
 875 #undef TARGET_ASM_NAMED_SECTION
 876 #define TARGET_ASM_NAMED_SECTION darwin_asm_named_section
 877
 878 #define DARWIN_REGISTER_TARGET_PRAGMAS()                        \
 879   do {                                                          \
 880     if (!flag_preprocess_only)                                  \
 881       cpp_register_pragma (parse_in, NULL, "mark",              \
 882                            darwin_pragma_ignore, false);        \
 883     c_register_pragma (0, "options", darwin_pragma_options);    \
 884     c_register_pragma (0, "segment", darwin_pragma_ignore);     \
 885     c_register_pragma (0, "unused", darwin_pragma_unused);      \
 886     c_register_pragma (0, "ms_struct", darwin_pragma_ms_struct); \
 887   } while (0)
 888
 889 #undef ASM_APP_ON
 890 #define ASM_APP_ON ""
 891 #undef ASM_APP_OFF
 892 #define ASM_APP_OFF ""
 893
 894 void darwin_register_frameworks (const char *, const char *, int);
 895 void darwin_register_objc_includes (const char *, const char *, int);
 896 #define TARGET_EXTRA_PRE_INCLUDES darwin_register_objc_includes
 897 #define TARGET_EXTRA_INCLUDES darwin_register_frameworks
 898
 899 void add_framework_path (char *);
 900 #define TARGET_OPTF add_framework_path
 901
 902 #define TARGET_POSIX_IO
 903
 904 /* All new versions of Darwin have C99 functions.  */
 905
 906 #define TARGET_C99_FUNCTIONS 1
 907
 908 #define WINT_TYPE "int"
 909
 910 /* Every program on darwin links against libSystem which contains the pthread
 911    routines, so there's no need to explicitly call out when doing threaded
 912    work.  */
 913
 914 #undef GOMP_SELF_SPECS
 915 #define GOMP_SELF_SPECS ""
 916
 917 /* Darwin can't support anchors until we can cope with the adjustments
 918    to size that ASM_DECLARE_OBJECT_NAME and ASM_DECLARE_CONSTANT_NAME
 919    when outputting members of an anchor block and the linker can be
 920    taught to keep them together or we find some other suitable
 921    code-gen technique.  */
 922
 923 #if 0
 924 #define TARGET_ASM_OUTPUT_ANCHOR darwin_asm_output_anchor
 925 #else
 926 #define TARGET_ASM_OUTPUT_ANCHOR NULL
 927 #endif
 928
 929 /* Attempt to turn on execute permission for the stack.  This may be
 930     used by TARGET_TRAMPOLINE_INIT if the target needs it (that is,
 931     if the target machine can change execute permissions on a page).
 932
 933     There is no way to query the execute permission of the stack, so
 934     we always issue the mprotect() call.
 935
 936     Unfortunately it is not possible to make this namespace-clean.
 937
 938     Also note that no errors should be emitted by this code; it is
 939     considered dangerous for library calls to send messages to
 940     stdout/stderr.  */
 941
 942 #define ENABLE_EXECUTE_STACK                                            \
 943 extern void __enable_execute_stack (void *);                            \
 944 void                                                                    \
 945 __enable_execute_stack (void *addr)                                     \
 946 {                                                                       \
 947    extern int mprotect (void *, size_t, int);                           \
 948    extern int getpagesize (void);                                       \
 949    static int size;                                                     \
 950    static long mask;                                                    \
 951                                                                         \
 952    char *page, *end;                                                    \
 953                                                                         \
 954    if (size == 0)                                                       \
 955      {                                                                  \
 956        size = getpagesize();                                            \
 957        mask = ~((long) size - 1);                                       \
 958      }                                                                  \
 959                                                                         \
 960    page = (char *) (((long) addr) & mask);                              \
 961    end  = (char *) ((((long) (addr + (TARGET_64BIT ? 48 : 40))) & mask) + size); \
 962                                                                         \
 963    /* 7 == PROT_READ | PROT_WRITE | PROT_EXEC */                        \
 964    (void) mprotect (page, end - page, 7);                               \
 965 }
 966
 967 /* For Apple KEXTs, we make the constructors return this to match gcc
 968    2.95.  */
 969 #define TARGET_CXX_CDTOR_RETURNS_THIS (darwin_kextabi_p)
 970 #define TARGET_KEXTABI flag_apple_kext
 971
 972 /* We have target-specific builtins.  */
 973 #define TARGET_FOLD_BUILTIN darwin_fold_builtin
 974
 975 #define TARGET_OBJC_CONSTRUCT_STRING_OBJECT \
 976   darwin_objc_construct_string
 977
 978 #define TARGET_STRING_OBJECT_REF_TYPE_P \
 979   darwin_cfstring_ref_p
 980
 981 #define TARGET_N_FORMAT_TYPES 1
 982 #define TARGET_FORMAT_TYPES darwin_additional_format_types
 983
 984 #define TARGET_CHECK_STRING_OBJECT_FORMAT_ARG \
 985   darwin_check_cfstring_format_arg
 986
 987 #define TARGET_HAS_TARGETCM 1
 988
 989 extern void darwin_driver_init (unsigned int *decoded_options_count,
 990                                 struct cl_decoded_option **decoded_options);
 991 #define GCC_DRIVER_HOST_INITIALIZATION \
 992   darwin_driver_init (&decoded_options_count, &decoded_options)
 993
 994 /* The Apple assembler and linker do not support constructor priorities.  */
 995 #undef SUPPORTS_INIT_PRIORITY
 996 #define SUPPORTS_INIT_PRIORITY 0
 997
 998 #endif /* CONFIG_DARWIN_H */