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