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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 /* Declare the section variables.  */
668 #ifndef USED_FOR_TARGET
669 enum darwin_section_enum {
670 #define DEF_SECTION(NAME, FLAGS, DIRECTIVE, OBJC) NAME,
671 #include "darwin-sections.def"
672 #undef DEF_SECTION
673   NUM_DARWIN_SECTIONS
674 };
675 extern GTY(()) section * darwin_sections[NUM_DARWIN_SECTIONS];
676 #endif
677
678 #undef  TARGET_ASM_SELECT_SECTION
679 #define TARGET_ASM_SELECT_SECTION machopic_select_section
680 #define USE_SELECT_SECTION_FOR_FUNCTIONS
681 #undef  TARGET_ASM_FUNCTION_SECTION
682 #define TARGET_ASM_FUNCTION_SECTION darwin_function_section
683
684 #undef  TARGET_ASM_SELECT_RTX_SECTION
685 #define TARGET_ASM_SELECT_RTX_SECTION machopic_select_rtx_section
686 #undef  TARGET_ASM_UNIQUE_SECTION
687 #define TARGET_ASM_UNIQUE_SECTION darwin_unique_section
688 #undef  TARGET_ASM_FUNCTION_RODATA_SECTION
689 #define TARGET_ASM_FUNCTION_RODATA_SECTION default_no_function_rodata_section
690 #undef  TARGET_ASM_RELOC_RW_MASK
691 #define TARGET_ASM_RELOC_RW_MASK machopic_reloc_rw_mask
692
693
694 #define ASM_DECLARE_UNRESOLVED_REFERENCE(FILE,NAME)                     \
695     do {                                                                \
696          if (FILE) {                                                    \
697            if (MACHOPIC_INDIRECT)                                       \
698              fprintf (FILE, "\t.lazy_reference ");                      \
699            else                                                         \
700              fprintf (FILE, "\t.reference ");                           \
701            assemble_name (FILE, NAME);                                  \
702            fprintf (FILE, "\n");                                        \
703          }                                                              \
704        } while (0)
705
706 #define ASM_DECLARE_CLASS_REFERENCE(FILE,NAME)                          \
707     do {                                                                \
708          if (FILE) {                                                    \
709            fprintf (FILE, "\t");                                        \
710            assemble_name (FILE, NAME);                                  \
711            fprintf (FILE, "=0\n");                                      \
712            (*targetm.asm_out.globalize_label) (FILE, NAME);             \
713          }                                                              \
714        } while (0)
715
716 /* Globalizing directive for a label.  */
717 #define GLOBAL_ASM_OP "\t.globl "
718 #define TARGET_ASM_GLOBALIZE_LABEL darwin_globalize_label
719
720 /* Emit an assembler directive to set visibility for a symbol.  Used
721    to support visibility attribute and Darwin's private extern
722    feature.  */
723 #undef TARGET_ASM_ASSEMBLE_VISIBILITY
724 #define TARGET_ASM_ASSEMBLE_VISIBILITY darwin_assemble_visibility
725
726 /* Extra attributes for Darwin.  */
727 #define SUBTARGET_ATTRIBUTE_TABLE                                            \
728   /* { name, min_len, max_len, decl_req, type_req, fn_type_req, handler } */ \
729   { "apple_kext_compatibility", 0, 0, false, true, false,                    \
730     darwin_handle_kext_attribute },                                          \
731   { "weak_import", 0, 0, true, false, false,                                 \
732     darwin_handle_weak_import_attribute }
733
734 #undef ASM_GENERATE_INTERNAL_LABEL
735 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM)   \
736   sprintf (LABEL, "*%s%ld", PREFIX, (long)(NUM))
737
738 #undef TARGET_ASM_MARK_DECL_PRESERVED
739 #define TARGET_ASM_MARK_DECL_PRESERVED darwin_mark_decl_preserved
740
741 /* Set on a symbol with SYMBOL_FLAG_FUNCTION or
742    MACHO_SYMBOL_FLAG_VARIABLE to indicate that the function or
743    variable has been defined in this translation unit.
744    When porting Mach-O to new architectures you need to make
745    sure these aren't clobbered by the backend.  */
746
747 #define MACHO_SYMBOL_FLAG_VARIABLE (SYMBOL_FLAG_MACH_DEP)
748 #define MACHO_SYMBOL_FLAG_DEFINED ((SYMBOL_FLAG_MACH_DEP) << 1)
749
750 /* Set on a symbol to indicate when fix-and-continue style code
751    generation is being used and the symbol refers to a static symbol
752    that should be rebound from new instances of a translation unit to
753    the original instance of the data.  */
754
755 #define MACHO_SYMBOL_STATIC ((SYMBOL_FLAG_MACH_DEP) << 2)
756
757 /* Symbolic names for various things we might know about a symbol.  */
758
759 enum machopic_addr_class {
760   MACHOPIC_UNDEFINED,
761   MACHOPIC_DEFINED_DATA,
762   MACHOPIC_UNDEFINED_DATA,
763   MACHOPIC_DEFINED_FUNCTION,
764   MACHOPIC_UNDEFINED_FUNCTION
765 };
766
767 /* Macros defining the various PIC cases.  */
768
769 #undef  MACHO_DYNAMIC_NO_PIC_P
770 #define MACHO_DYNAMIC_NO_PIC_P  (TARGET_MACHO_DYNAMIC_NO_PIC)
771 #undef  MACHOPIC_INDIRECT
772 #define MACHOPIC_INDIRECT       (flag_pic || MACHO_DYNAMIC_NO_PIC_P)
773 #define MACHOPIC_JUST_INDIRECT  (MACHO_DYNAMIC_NO_PIC_P)
774 #undef  MACHOPIC_PURE
775 #define MACHOPIC_PURE           (flag_pic && ! MACHO_DYNAMIC_NO_PIC_P)
776
777 #undef TARGET_ENCODE_SECTION_INFO
778 #define TARGET_ENCODE_SECTION_INFO  darwin_encode_section_info
779 #undef TARGET_STRIP_NAME_ENCODING
780 #define TARGET_STRIP_NAME_ENCODING  default_strip_name_encoding
781
782 #define GEN_BINDER_NAME_FOR_STUB(BUF,STUB,STUB_LENGTH)          \
783   do {                                                          \
784     const char *const stub_ = (STUB);                           \
785     char *buffer_ = (BUF);                                      \
786     strcpy (buffer_, stub_);                                    \
787     if (stub_[0] == '"')                                        \
788       {                                                         \
789         strcpy (buffer_ + (STUB_LENGTH) - 1, "_binder\"");      \
790       }                                                         \
791     else                                                        \
792       {                                                         \
793         strcpy (buffer_ + (STUB_LENGTH), "_binder");            \
794       }                                                         \
795   } while (0)
796
797 #define GEN_SYMBOL_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH)    \
798   do {                                                          \
799     const char *const symbol_ = (SYMBOL);                       \
800     char *buffer_ = (BUF);                                      \
801     if (name_needs_quotes (symbol_) && symbol_[0] != '"')       \
802       {                                                         \
803           sprintf (buffer_, "\"%s\"", symbol_);                 \
804       }                                                         \
805     else                                                        \
806       {                                                         \
807         strcpy (buffer_, symbol_);                              \
808       }                                                         \
809   } while (0)
810
811 /* Given a symbol name string, create the lazy pointer version
812    of the symbol name.  */
813
814 #define GEN_LAZY_PTR_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH)  \
815   do {                                                          \
816     const char *symbol_ = (SYMBOL);                             \
817     char *buffer_ = (BUF);                                      \
818     if (symbol_[0] == '"')                                      \
819       {                                                         \
820         strcpy (buffer_, "\"L");                                \
821         strcpy (buffer_ + 2, symbol_ + 1);                      \
822         strcpy (buffer_ + (SYMBOL_LENGTH), "$lazy_ptr\"");      \
823       }                                                         \
824     else if (name_needs_quotes (symbol_))                       \
825       {                                                         \
826         strcpy (buffer_, "\"L");                                \
827         strcpy (buffer_ + 2, symbol_);                          \
828         strcpy (buffer_ + (SYMBOL_LENGTH) + 2, "$lazy_ptr\"");  \
829       }                                                         \
830     else                                                        \
831       {                                                         \
832         strcpy (buffer_, "L");                                  \
833         strcpy (buffer_ + 1, symbol_);                          \
834         strcpy (buffer_ + (SYMBOL_LENGTH) + 1, "$lazy_ptr");    \
835       }                                                         \
836   } while (0)
837
838 #define EH_FRAME_SECTION_NAME   "__TEXT"
839 #define EH_FRAME_SECTION_ATTR ",coalesced,no_toc+strip_static_syms+live_support"
840
841 /* Java runtime class list.  */
842 #define JCR_SECTION_NAME "__DATA,jcr,regular,no_dead_strip"
843
844 #undef ASM_PREFERRED_EH_DATA_FORMAT
845 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL)  \
846   (((CODE) == 2 && (GLOBAL) == 1) \
847    ? (DW_EH_PE_pcrel | DW_EH_PE_indirect | DW_EH_PE_sdata4) : \
848      ((CODE) == 1 || (GLOBAL) == 0) ? DW_EH_PE_pcrel : DW_EH_PE_absptr)
849
850 #define ASM_OUTPUT_DWARF_DELTA(FILE,SIZE,LABEL1,LABEL2)  \
851   darwin_asm_output_dwarf_delta (FILE, SIZE, LABEL1, LABEL2)
852
853 #define ASM_OUTPUT_DWARF_OFFSET(FILE,SIZE,LABEL,BASE)  \
854   darwin_asm_output_dwarf_offset (FILE, SIZE, LABEL, BASE)
855
856 #define ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX(ASM_OUT_FILE, ENCODING, SIZE, ADDR, DONE)     \
857       if (ENCODING == ASM_PREFERRED_EH_DATA_FORMAT (2, 1)) {                            \
858         darwin_non_lazy_pcrel (ASM_OUT_FILE, ADDR);                                     \
859         goto DONE;                                                                      \
860       }
861
862 /* Experimentally, putting jump tables in text is faster on SPEC.
863    Also this is needed for correctness for coalesced functions.  */
864
865 #ifndef JUMP_TABLES_IN_TEXT_SECTION
866 #define JUMP_TABLES_IN_TEXT_SECTION 1
867 #endif
868
869 #define TARGET_TERMINATE_DW2_EH_FRAME_INFO false
870
871 #define TARGET_ASM_INIT_SECTIONS darwin_init_sections
872 #undef TARGET_ASM_NAMED_SECTION
873 #define TARGET_ASM_NAMED_SECTION darwin_asm_named_section
874
875 #define DARWIN_REGISTER_TARGET_PRAGMAS()                        \
876   do {                                                          \
877     if (!flag_preprocess_only)                                  \
878       cpp_register_pragma (parse_in, NULL, "mark",              \
879                            darwin_pragma_ignore, false);        \
880     c_register_pragma (0, "options", darwin_pragma_options);    \
881     c_register_pragma (0, "segment", darwin_pragma_ignore);     \
882     c_register_pragma (0, "unused", darwin_pragma_unused);      \
883     c_register_pragma (0, "ms_struct", darwin_pragma_ms_struct); \
884   } while (0)
885
886 #undef ASM_APP_ON
887 #define ASM_APP_ON ""
888 #undef ASM_APP_OFF
889 #define ASM_APP_OFF ""
890
891 void darwin_register_frameworks (const char *, const char *, int);
892 void darwin_register_objc_includes (const char *, const char *, int);
893 #define TARGET_EXTRA_PRE_INCLUDES darwin_register_objc_includes
894 #define TARGET_EXTRA_INCLUDES darwin_register_frameworks
895
896 void add_framework_path (char *);
897 #define TARGET_OPTF add_framework_path
898
899 #define TARGET_POSIX_IO
900
901 /* All new versions of Darwin have C99 functions.  */
902
903 #define TARGET_C99_FUNCTIONS 1
904
905 #define WINT_TYPE "int"
906
907 /* Every program on darwin links against libSystem which contains the pthread
908    routines, so there's no need to explicitly call out when doing threaded
909    work.  */
910
911 #undef GOMP_SELF_SPECS
912 #define GOMP_SELF_SPECS ""
913
914 /* Darwin can't support anchors until we can cope with the adjustments
915    to size that ASM_DECLARE_OBJECT_NAME and ASM_DECLARE_CONSTANT_NAME
916    when outputting members of an anchor block and the linker can be
917    taught to keep them together or we find some other suitable
918    code-gen technique.  */
919
920 #if 0
921 #define TARGET_ASM_OUTPUT_ANCHOR darwin_asm_output_anchor
922 #else
923 #define TARGET_ASM_OUTPUT_ANCHOR NULL
924 #endif
925
926 /* Attempt to turn on execute permission for the stack.  This may be
927     used by TARGET_TRAMPOLINE_INIT if the target needs it (that is,
928     if the target machine can change execute permissions on a page).
929
930     There is no way to query the execute permission of the stack, so
931     we always issue the mprotect() call.
932
933     Unfortunately it is not possible to make this namespace-clean.
934
935     Also note that no errors should be emitted by this code; it is
936     considered dangerous for library calls to send messages to
937     stdout/stderr.  */
938
939 #define ENABLE_EXECUTE_STACK                                            \
940 extern void __enable_execute_stack (void *);                            \
941 void                                                                    \
942 __enable_execute_stack (void *addr)                                     \
943 {                                                                       \
944    extern int mprotect (void *, size_t, int);                           \
945    extern int getpagesize (void);                                       \
946    static int size;                                                     \
947    static long mask;                                                    \
948                                                                         \
949    char *page, *end;                                                    \
950                                                                         \
951    if (size == 0)                                                       \
952      {                                                                  \
953        size = getpagesize();                                            \
954        mask = ~((long) size - 1);                                       \
955      }                                                                  \
956                                                                         \
957    page = (char *) (((long) addr) & mask);                              \
958    end  = (char *) ((((long) (addr + (TARGET_64BIT ? 48 : 40))) & mask) + size); \
959                                                                         \
960    /* 7 == PROT_READ | PROT_WRITE | PROT_EXEC */                        \
961    (void) mprotect (page, end - page, 7);                               \
962 }
963
964 /* For Apple KEXTs, we make the constructors return this to match gcc
965    2.95.  */
966 #define TARGET_CXX_CDTOR_RETURNS_THIS (darwin_kextabi_p)
967 #define TARGET_KEXTABI flag_apple_kext
968
969 /* We have target-specific builtins.  */
970 #define TARGET_FOLD_BUILTIN darwin_fold_builtin
971
972 #define TARGET_OBJC_CONSTRUCT_STRING_OBJECT \
973   darwin_objc_construct_string
974
975 #define TARGET_STRING_OBJECT_REF_TYPE_P \
976   darwin_cfstring_ref_p
977
978 #define TARGET_N_FORMAT_TYPES 1
979 #define TARGET_FORMAT_TYPES darwin_additional_format_types
980
981 #define TARGET_CHECK_STRING_OBJECT_FORMAT_ARG \
982   darwin_check_cfstring_format_arg
983
984 #define TARGET_HAS_TARGETCM 1
985
986 extern void darwin_driver_init (unsigned int *decoded_options_count,
987                                 struct cl_decoded_option **decoded_options);
988 #define GCC_DRIVER_HOST_INITIALIZATION \
989   darwin_driver_init (&decoded_options_count, &decoded_options)
990
991 /* The Apple assembler and linker do not support constructor priorities.  */
992 #undef SUPPORTS_INIT_PRIORITY
993 #define SUPPORTS_INIT_PRIORITY 0
994
995 #endif /* CONFIG_DARWIN_H */