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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 OBJECT_FORMAT_MACHO
46
47 /* Don't assume anything about the header files. */
48 #define NO_IMPLICIT_EXTERN_C
49
50 /* Suppress g++ attempt to link in the math library automatically. */
51 #define MATH_LIBRARY ""
52
53 /* We have atexit. */
54
55 #define HAVE_ATEXIT
56
57 /* Define an empty body for the function do_global_dtors() in libgcc2.c. */
58
59 #define DO_GLOBAL_DTORS_BODY
60
61 /* The string value for __SIZE_TYPE__. */
62
63 #ifndef SIZE_TYPE
64 #define SIZE_TYPE "long unsigned int"
65 #endif
66
67 /* Type used for ptrdiff_t, as a string used in a declaration. */
68
69 #undef PTRDIFF_TYPE
70 #define PTRDIFF_TYPE "int"
71
72 /* wchar_t is int. */
73
74 #undef WCHAR_TYPE
75 #define WCHAR_TYPE "int"
76 #undef WCHAR_TYPE_SIZE
77 #define WCHAR_TYPE_SIZE 32
78
79 #define INT8_TYPE "signed char"
80 #define INT16_TYPE "short int"
81 #define INT32_TYPE "int"
82 #define INT64_TYPE "long long int"
83 #define UINT8_TYPE "unsigned char"
84 #define UINT16_TYPE "short unsigned int"
85 #define UINT32_TYPE "unsigned int"
86 #define UINT64_TYPE "long long unsigned int"
87
88 #define INT_LEAST8_TYPE "signed char"
89 #define INT_LEAST16_TYPE "short int"
90 #define INT_LEAST32_TYPE "int"
91 #define INT_LEAST64_TYPE "long long int"
92 #define UINT_LEAST8_TYPE "unsigned char"
93 #define UINT_LEAST16_TYPE "short unsigned int"
94 #define UINT_LEAST32_TYPE "unsigned int"
95 #define UINT_LEAST64_TYPE "long long unsigned int"
96
97 #define INT_FAST8_TYPE "signed char"
98 #define INT_FAST16_TYPE "short int"
99 #define INT_FAST32_TYPE "int"
100 #define INT_FAST64_TYPE "long long int"
101 #define UINT_FAST8_TYPE "unsigned char"
102 #define UINT_FAST16_TYPE "short unsigned int"
103 #define UINT_FAST32_TYPE "unsigned int"
104 #define UINT_FAST64_TYPE "long long unsigned int"
105
106 #define INTPTR_TYPE "long int"
107 #define UINTPTR_TYPE "long unsigned int"
108
109 #define SIG_ATOMIC_TYPE "int"
110
111 /* Default to using the NeXT-style runtime, since that's what is
112 pre-installed on Darwin systems. */
113
114 #define NEXT_OBJC_RUNTIME
115
116 /* Don't default to pcc-struct-return, because gcc is the only compiler, and
117 we want to retain compatibility with older gcc versions. */
118
119 #undef DEFAULT_PCC_STRUCT_RETURN
120 #define DEFAULT_PCC_STRUCT_RETURN 0
121
122 /* True if pragma ms_struct is in effect. */
123 extern GTY(()) int darwin_ms_struct;
124
125 /* This table intercepts weirdo options whose names would interfere
126 with normal driver conventions, and either translates them into
127 standardly-named options, or adds a 'Z' so that they can get to
128 specs processing without interference.
129
130 Do not expand a linker option to "-Xlinker -<option>", since that
131 forfeits the ability to control via spec strings later. However,
132 as a special exception, do this translation with -filelist, because
133 otherwise the driver will think there are no input files and quit.
134 (The alternative would be to hack the driver to recognize -filelist
135 specially, but it's simpler to use the translation table.)
136
137 Note that an option name with a prefix that matches another option
138 name, that also takes an argument, needs to be modified so the
139 prefix is different, otherwise a '*' after the shorter option will
140 match with the longer one.
141
142 The SUBTARGET_OPTION_TRANSLATE_TABLE macro, which _must_ be defined
143 in gcc/config/{i386,rs6000}/darwin.h, should contain any additional
144 command-line option translations specific to the particular target
145 architecture. */
146
147 #define TARGET_OPTION_TRANSLATE_TABLE \
148 { "-all_load", "-Zall_load" }, \
149 { "-allowable_client", "-Zallowable_client" }, \
150 { "-arch_errors_fatal", "-Zarch_errors_fatal" }, \
151 { "-bind_at_load", "-Zbind_at_load" }, \
152 { "-bundle", "-Zbundle" }, \
153 { "-bundle_loader", "-Zbundle_loader" }, \
154 { "-weak_reference_mismatches", "-Zweak_reference_mismatches" }, \
155 { "-dead_strip", "-Zdead_strip" }, \
156 { "-no_dead_strip_inits_and_terms", "-Zno_dead_strip_inits_and_terms" }, \
157 { "-dependency-file", "-MF" }, \
158 { "-dylib_file", "-Zdylib_file" }, \
159 { "-dynamic", "-Zdynamic" }, \
160 { "-dynamiclib", "-Zdynamiclib" }, \
161 { "-exported_symbols_list", "-Zexported_symbols_list" }, \
162 { "-gfull", "-g -fno-eliminate-unused-debug-symbols" }, \
163 { "-gused", "-g -feliminate-unused-debug-symbols" }, \
164 { "-segaddr", "-Zsegaddr" }, \
165 { "-segs_read_only_addr", "-Zsegs_read_only_addr" }, \
166 { "-segs_read_write_addr", "-Zsegs_read_write_addr" }, \
167 { "-seg_addr_table", "-Zseg_addr_table" }, \
168 { "-seg_addr_table_filename", "-Zfn_seg_addr_table_filename" }, \
169 { "-umbrella", "-Zumbrella" }, \
170 { "-fapple-kext", "-fapple-kext -static -Wa,-static" }, \
171 { "-filelist", "-Xlinker -filelist -Xlinker" }, \
172 { "-findirect-virtual-calls", "-fapple-kext" }, \
173 { "-flat_namespace", "-Zflat_namespace" }, \
174 { "-force_cpusubtype_ALL", "-Zforce_cpusubtype_ALL" }, \
175 { "-force_flat_namespace", "-Zforce_flat_namespace" }, \
176 { "-framework", "-Xlinker -framework -Xlinker" }, \
177 { "-fterminated-vtables", "-fapple-kext" }, \
178 { "-image_base", "-Zimage_base" }, \
179 { "-init", "-Zinit" }, \
180 { "-install_name", "-Zinstall_name" }, \
181 { "-mkernel", "-mkernel -static -Wa,-static" }, \
182 { "-multiply_defined_unused", "-Zmultiplydefinedunused" }, \
183 { "-multiply_defined", "-Zmultiply_defined" }, \
184 { "-multi_module", "-Zmulti_module" }, \
185 { "-static", "-static -Wa,-static" }, \
186 { "-shared", "-Zdynamiclib" }, \
187 { "-single_module", "-Zsingle_module" }, \
188 { "-unexported_symbols_list", "-Zunexported_symbols_list" }, \
189 SUBTARGET_OPTION_TRANSLATE_TABLE
190
191 #define SUBSUBTARGET_OVERRIDE_OPTIONS \
192 do { \
193 darwin_override_options (); \
194 } while (0)
195
196 /* These compiler options take n arguments. */
197
198 #undef WORD_SWITCH_TAKES_ARG
199 #define WORD_SWITCH_TAKES_ARG(STR) \
200 (DEFAULT_WORD_SWITCH_TAKES_ARG (STR) ? 1 : \
201 !strcmp (STR, "Zallowable_client") ? 1 : \
202 !strcmp (STR, "arch") ? 1 : \
203 !strcmp (STR, "arch_only") ? 1 : \
204 !strcmp (STR, "Zbundle_loader") ? 1 : \
205 !strcmp (STR, "client_name") ? 1 : \
206 !strcmp (STR, "compatibility_version") ? 1 : \
207 !strcmp (STR, "current_version") ? 1 : \
208 !strcmp (STR, "Zdylib_file") ? 1 : \
209 !strcmp (STR, "Zexported_symbols_list") ? 1 : \
210 !strcmp (STR, "Zimage_base") ? 1 : \
211 !strcmp (STR, "Zinit") ? 1 : \
212 !strcmp (STR, "Zinstall_name") ? 1 : \
213 !strcmp (STR, "Zmultiplydefinedunused") ? 1 : \
214 !strcmp (STR, "Zmultiply_defined") ? 1 : \
215 !strcmp (STR, "precomp-trustfile") ? 1 : \
216 !strcmp (STR, "read_only_relocs") ? 1 : \
217 !strcmp (STR, "sectcreate") ? 3 : \
218 !strcmp (STR, "sectorder") ? 3 : \
219 !strcmp (STR, "Zsegaddr") ? 2 : \
220 !strcmp (STR, "Zsegs_read_only_addr") ? 1 : \
221 !strcmp (STR, "Zsegs_read_write_addr") ? 1 : \
222 !strcmp (STR, "Zseg_addr_table") ? 1 : \
223 !strcmp (STR, "Zfn_seg_addr_table_filename") ? 1 :\
224 !strcmp (STR, "seg1addr") ? 1 : \
225 !strcmp (STR, "segprot") ? 3 : \
226 !strcmp (STR, "sub_library") ? 1 : \
227 !strcmp (STR, "sub_umbrella") ? 1 : \
228 !strcmp (STR, "Zumbrella") ? 1 : \
229 !strcmp (STR, "undefined") ? 1 : \
230 !strcmp (STR, "Zunexported_symbols_list") ? 1 : \
231 !strcmp (STR, "Zweak_reference_mismatches") ? 1 : \
232 !strcmp (STR, "pagezero_size") ? 1 : \
233 !strcmp (STR, "segs_read_only_addr") ? 1 : \
234 !strcmp (STR, "segs_read_write_addr") ? 1 : \
235 !strcmp (STR, "sectalign") ? 3 : \
236 !strcmp (STR, "sectobjectsymbols") ? 2 : \
237 !strcmp (STR, "segcreate") ? 3 : \
238 !strcmp (STR, "dylinker_install_name") ? 1 : \
239 0)
240
241 #define SUBTARGET_C_COMMON_OVERRIDE_OPTIONS do { \
242 if (flag_mkernel || flag_apple_kext) \
243 { \
244 if (flag_use_cxa_atexit == 2) \
245 flag_use_cxa_atexit = 0; \
246 /* kexts should always be built without the coalesced sections \
247 because the kernel loader doesn't grok such sections. */ \
248 flag_weak = 0; \
249 /* No RTTI in kexts. */ \
250 flag_rtti = 0; \
251 } \
252 } while (0)
253
254 /* Machine dependent cpp options. Don't add more options here, add
255 them to darwin_cpp_builtins in darwin-c.c. */
256
257 #undef CPP_SPEC
258 #define CPP_SPEC "%{static:%{!dynamic:-D__STATIC__}}%{!static:-D__DYNAMIC__}" \
259 " %{pthread:-D_REENTRANT}"
260
261 /* This is mostly a clone of the standard LINK_COMMAND_SPEC, plus
262 precomp, libtool, and fat build additions. Also we
263 don't specify a second %G after %L because libSystem is
264 self-contained and doesn't need to link against libgcc.a. */
265 /* In general, random Darwin linker flags should go into LINK_SPEC
266 instead of LINK_COMMAND_SPEC. The command spec is better for
267 specifying the handling of options understood by generic Unix
268 linkers, and for positional arguments like libraries. */
269 #define LINK_COMMAND_SPEC "\
270 %{!fdump=*:%{!fsyntax-only:%{!c:%{!M:%{!MM:%{!E:%{!S:\
271 %(linker) %l %X %{d} %{s} %{t} %{Z} %{u*} \
272 %{A} %{e*} %{m} %{r} %{x} \
273 %{o*}%{!o:-o a.out} \
274 %{!A:%{!nostdlib:%{!nostartfiles:%S}}} \
275 %{L*} %(link_libgcc) %o %{fprofile-arcs|fprofile-generate*|coverage:-lgcov} \
276 %{fopenmp|ftree-parallelize-loops=*: \
277 %{static|static-libgcc|static-libstdc++|static-libgfortran: libgomp.a%s; : -lgomp } } \
278 %{!nostdlib:%{!nodefaultlibs: %(link_ssp) %G %L }} \
279 %{!A:%{!nostdlib:%{!nostartfiles:%E}}} %{T*} %{F*} }}}}}}}\n\
280 %{!fdump=*:%{!fsyntax-only:%{!c:%{!M:%{!MM:%{!E:%{!S:\
281 %{.c|.cc|.C|.cpp|.cp|.c++|.cxx|.CPP|.m|.mm: \
282 %{gdwarf-2:%{!gstabs*:%{!g0: dsymutil %{o*:%*}%{!o:a.out}}}}}}}}}}}}"
283
284 #ifdef TARGET_SYSTEM_ROOT
285 #define LINK_SYSROOT_SPEC \
286 "%{isysroot*:-syslibroot %*;:-syslibroot " TARGET_SYSTEM_ROOT "}"
287 #else
288 #define LINK_SYSROOT_SPEC "%{isysroot*:-syslibroot %*}"
289 #endif
290
291 /* Please keep the random linker options in alphabetical order (modulo
292 'Z' and 'no' prefixes). Note that options taking arguments may appear
293 multiple times on a command line with different arguments each time,
294 so put a * after their names so all of them get passed. */
295 #define LINK_SPEC \
296 "%{static}%{!static:-dynamic} \
297 %{fgnu-runtime: %{static|static-libgcc: \
298 %:replace-outfile(-lobjc libobjc-gnu.a%s); \
299 :%:replace-outfile(-lobjc -lobjc-gnu ) } }\
300 %{static|static-libgcc|static-libgfortran:%:replace-outfile(-lgfortran libgfortran.a%s)}\
301 %{static|static-libgcc|static-libstdc++|static-libgfortran:%:replace-outfile(-lgomp libgomp.a%s)}\
302 %{static|static-libgcc|static-libstdc++:%:replace-outfile(-lstdc++ libstdc++.a%s)}\
303 %{!Zdynamiclib: \
304 %{Zforce_cpusubtype_ALL:-arch %(darwin_arch) -force_cpusubtype_ALL} \
305 %{!Zforce_cpusubtype_ALL:-arch %(darwin_subarch)} \
306 %{Zbundle:-bundle} \
307 %{Zbundle_loader*:-bundle_loader %*} \
308 %{client_name*} \
309 %{compatibility_version*:%e-compatibility_version only allowed with -dynamiclib\
310 } \
311 %{current_version*:%e-current_version only allowed with -dynamiclib} \
312 %{Zforce_flat_namespace:-force_flat_namespace} \
313 %{Zinstall_name*:%e-install_name only allowed with -dynamiclib} \
314 %{keep_private_externs} \
315 %{private_bundle} \
316 } \
317 %{Zdynamiclib: -dylib \
318 %{Zbundle:%e-bundle not allowed with -dynamiclib} \
319 %{Zbundle_loader*:%e-bundle_loader not allowed with -dynamiclib} \
320 %{client_name*:%e-client_name not allowed with -dynamiclib} \
321 %{compatibility_version*:-dylib_compatibility_version %*} \
322 %{current_version*:-dylib_current_version %*} \
323 %{Zforce_cpusubtype_ALL:-arch %(darwin_arch)} \
324 %{!Zforce_cpusubtype_ALL: -arch %(darwin_subarch)} \
325 %{Zforce_flat_namespace:%e-force_flat_namespace not allowed with -dynamiclib} \
326 %{Zinstall_name*:-dylib_install_name %*} \
327 %{keep_private_externs:%e-keep_private_externs not allowed with -dynamiclib} \
328 %{private_bundle:%e-private_bundle not allowed with -dynamiclib} \
329 } \
330 %{Zall_load:-all_load} \
331 %{Zallowable_client*:-allowable_client %*} \
332 %{Zbind_at_load:-bind_at_load} \
333 %{Zarch_errors_fatal:-arch_errors_fatal} \
334 %{Zdead_strip:-dead_strip} \
335 %{Zno_dead_strip_inits_and_terms:-no_dead_strip_inits_and_terms} \
336 %{Zdylib_file*:-dylib_file %*} \
337 %{Zdynamic:-dynamic}\
338 %{Zexported_symbols_list*:-exported_symbols_list %*} \
339 %{Zflat_namespace:-flat_namespace} \
340 %{headerpad_max_install_names*} \
341 %{Zimage_base*:-image_base %*} \
342 %{Zinit*:-init %*} \
343 %{!mmacosx-version-min=*:-macosx_version_min %(darwin_minversion)} \
344 %{mmacosx-version-min=*:-macosx_version_min %*} \
345 %{nomultidefs} \
346 %{Zmulti_module:-multi_module} %{Zsingle_module:-single_module} \
347 %{Zmultiply_defined*:-multiply_defined %*} \
348 %{!Zmultiply_defined*:%{shared-libgcc: \
349 %:version-compare(< 10.5 mmacosx-version-min= -multiply_defined) \
350 %:version-compare(< 10.5 mmacosx-version-min= suppress)}} \
351 %{Zmultiplydefinedunused*:-multiply_defined_unused %*} \
352 %{fpie:-pie} \
353 %{prebind} %{noprebind} %{nofixprebinding} %{prebind_all_twolevel_modules} \
354 %{read_only_relocs} \
355 %{sectcreate*} %{sectorder*} %{seg1addr*} %{segprot*} \
356 %{Zsegaddr*:-segaddr %*} \
357 %{Zsegs_read_only_addr*:-segs_read_only_addr %*} \
358 %{Zsegs_read_write_addr*:-segs_read_write_addr %*} \
359 %{Zseg_addr_table*: -seg_addr_table %*} \
360 %{Zfn_seg_addr_table_filename*:-seg_addr_table_filename %*} \
361 %{sub_library*} %{sub_umbrella*} \
362 " LINK_SYSROOT_SPEC " \
363 %{twolevel_namespace} %{twolevel_namespace_hints} \
364 %{Zumbrella*: -umbrella %*} \
365 %{undefined*} \
366 %{Zunexported_symbols_list*:-unexported_symbols_list %*} \
367 %{Zweak_reference_mismatches*:-weak_reference_mismatches %*} \
368 %{!Zweak_reference_mismatches*:-weak_reference_mismatches non-weak} \
369 %{X} \
370 %{y*} \
371 %{w} \
372 %{pagezero_size*} %{segs_read_*} %{seglinkedit} %{noseglinkedit} \
373 %{sectalign*} %{sectobjectsymbols*} %{segcreate*} %{whyload} \
374 %{whatsloaded} %{dylinker_install_name*} \
375 %{dylinker} %{Mach} "
376
377
378 /* Machine dependent libraries. */
379
380 #define LIB_SPEC "%{!static:-lSystem}"
381
382 /* Support -mmacosx-version-min by supplying different (stub) libgcc_s.dylib
383 libraries to link against, and by not linking against libgcc_s on
384 earlier-than-10.3.9.
385
386 Note that by default, -lgcc_eh is not linked against! This is
387 because in a future version of Darwin the EH frame information may
388 be in a new format, or the fallback routine might be changed; if
389 you want to explicitly link against the static version of those
390 routines, because you know you don't need to unwind through system
391 libraries, you need to explicitly say -static-libgcc.
392
393 If it is linked against, it has to be before -lgcc, because it may
394 need symbols from -lgcc. */
395 #undef REAL_LIBGCC_SPEC
396 #define REAL_LIBGCC_SPEC \
397 "%{static-libgcc|static: -lgcc_eh -lgcc; \
398 shared-libgcc|fexceptions|fgnu-runtime: \
399 %:version-compare(!> 10.5 mmacosx-version-min= -lgcc_s.10.4) \
400 %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_s.10.5) \
401 %:version-compare(!> 10.5 mmacosx-version-min= -lgcc_ext.10.4) \
402 %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_ext.10.5) \
403 -lgcc; \
404 :%:version-compare(>< 10.3.9 10.5 mmacosx-version-min= -lgcc_s.10.4) \
405 %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_s.10.5) \
406 %:version-compare(!> 10.5 mmacosx-version-min= -lgcc_ext.10.4) \
407 %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_ext.10.5) \
408 -lgcc}"
409
410 /* We specify crt0.o as -lcrt0.o so that ld will search the library path.
411
412 crt3.o provides __cxa_atexit on systems that don't have it. Since
413 it's only used with C++, which requires passing -shared-libgcc, key
414 off that to avoid unnecessarily adding a destructor to every
415 powerpc program built. */
416
417 #undef STARTFILE_SPEC
418 #define STARTFILE_SPEC \
419 "%{Zdynamiclib: %(darwin_dylib1) } \
420 %{!Zdynamiclib:%{Zbundle:%{!static:-lbundle1.o}} \
421 %{!Zbundle:%{pg:%{static:-lgcrt0.o} \
422 %{!static:%{object:-lgcrt0.o} \
423 %{!object:%{preload:-lgcrt0.o} \
424 %{!preload:-lgcrt1.o %(darwin_crt2)}}}} \
425 %{!pg:%{static:-lcrt0.o} \
426 %{!static:%{object:-lcrt0.o} \
427 %{!object:%{preload:-lcrt0.o} \
428 %{!preload: %(darwin_crt1) \
429 %(darwin_crt2)}}}}}} \
430 %{shared-libgcc:%:version-compare(< 10.5 mmacosx-version-min= crt3.o%s)}"
431
432 /* The native Darwin linker doesn't necessarily place files in the order
433 that they're specified on the link line. Thus, it is pointless
434 to put anything in ENDFILE_SPEC. */
435 /* #define ENDFILE_SPEC "" */
436
437 #define DARWIN_EXTRA_SPECS \
438 { "darwin_crt1", DARWIN_CRT1_SPEC }, \
439 { "darwin_dylib1", DARWIN_DYLIB1_SPEC }, \
440 { "darwin_minversion", DARWIN_MINVERSION_SPEC },
441
442 #define DARWIN_DYLIB1_SPEC \
443 "%:version-compare(!> 10.5 mmacosx-version-min= -ldylib1.o) \
444 %:version-compare(>= 10.5 mmacosx-version-min= -ldylib1.10.5.o)"
445
446 #define DARWIN_CRT1_SPEC \
447 "%:version-compare(!> 10.5 mmacosx-version-min= -lcrt1.o) \
448 %:version-compare(>= 10.5 mmacosx-version-min= -lcrt1.10.5.o)"
449
450 /* Default Darwin ASM_SPEC, very simple. */
451 #define ASM_SPEC "-arch %(darwin_arch) \
452 %{Zforce_cpusubtype_ALL:-force_cpusubtype_ALL}"
453
454 /* We still allow output of STABS. */
455
456 #define DBX_DEBUGGING_INFO 1
457
458 #define DWARF2_DEBUGGING_INFO 1
459 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
460
461 #define DEBUG_FRAME_SECTION "__DWARF,__debug_frame,regular,debug"
462 #define DEBUG_INFO_SECTION "__DWARF,__debug_info,regular,debug"
463 #define DEBUG_ABBREV_SECTION "__DWARF,__debug_abbrev,regular,debug"
464 #define DEBUG_ARANGES_SECTION "__DWARF,__debug_aranges,regular,debug"
465 #define DEBUG_MACINFO_SECTION "__DWARF,__debug_macinfo,regular,debug"
466 #define DEBUG_LINE_SECTION "__DWARF,__debug_line,regular,debug"
467 #define DEBUG_LOC_SECTION "__DWARF,__debug_loc,regular,debug"
468 #define DEBUG_PUBNAMES_SECTION "__DWARF,__debug_pubnames,regular,debug"
469 #define DEBUG_PUBTYPES_SECTION "__DWARF,__debug_pubtypes,regular,debug"
470 #define DEBUG_STR_SECTION "__DWARF,__debug_str,regular,debug"
471 #define DEBUG_RANGES_SECTION "__DWARF,__debug_ranges,regular,debug"
472
473 /* When generating stabs debugging, use N_BINCL entries. */
474
475 #define DBX_USE_BINCL
476
477 /* There is no limit to the length of stabs strings. */
478
479 #define DBX_CONTIN_LENGTH 0
480
481 /* gdb needs a null N_SO at the end of each file for scattered loading. */
482
483 #define DBX_OUTPUT_NULL_N_SO_AT_MAIN_SOURCE_FILE_END
484
485 /* GCC's definition of 'one_only' is the same as its definition of 'weak'. */
486 #define MAKE_DECL_ONE_ONLY(DECL) (DECL_WEAK (DECL) = 1)
487
488 /* Mach-O supports 'weak imports', and 'weak definitions' in coalesced
489 sections. machopic_select_section ensures that weak variables go in
490 coalesced sections. Weak aliases (or any other kind of aliases) are
491 not supported. Weak symbols that aren't visible outside the .s file
492 are not supported. */
493 #define ASM_WEAKEN_DECL(FILE, DECL, NAME, ALIAS) \
494 do { \
495 if (ALIAS) \
496 { \
497 warning (0, "alias definitions not supported in Mach-O; ignored"); \
498 break; \
499 } \
500 \
501 if (! DECL_EXTERNAL (DECL) && TREE_PUBLIC (DECL)) \
502 targetm.asm_out.globalize_label (FILE, NAME); \
503 if (DECL_EXTERNAL (DECL)) \
504 fputs ("\t.weak_reference ", FILE); \
505 else if (lookup_attribute ("weak_import", DECL_ATTRIBUTES (DECL))) \
506 break; \
507 else if (TREE_PUBLIC (DECL)) \
508 fputs ("\t.weak_definition ", FILE); \
509 else \
510 break; \
511 assemble_name (FILE, NAME); \
512 fputc ('\n', FILE); \
513 } while (0)
514
515 /* Darwin has the pthread routines in libSystem, which every program
516 links to, so there's no need for weak-ness for that. */
517 #define GTHREAD_USE_WEAK 0
518
519 /* The Darwin linker imposes two limitations on common symbols: they
520 can't have hidden visibility, and they can't appear in dylibs. As
521 a consequence, we should never use common symbols to represent
522 vague linkage. */
523 #undef USE_COMMON_FOR_ONE_ONLY
524 #define USE_COMMON_FOR_ONE_ONLY 0
525
526 /* The Darwin linker doesn't want coalesced symbols to appear in
527 a static archive's table of contents. */
528 #undef TARGET_WEAK_NOT_IN_ARCHIVE_TOC
529 #define TARGET_WEAK_NOT_IN_ARCHIVE_TOC 1
530
531 /* On Darwin, we don't (at the time of writing) have linkonce sections
532 with names, so it's safe to make the class data not comdat. */
533 #define TARGET_CXX_CLASS_DATA_ALWAYS_COMDAT hook_bool_void_false
534
535 /* For efficiency, on Darwin the RTTI information that is always
536 emitted in the standard C++ library should not be COMDAT. */
537 #define TARGET_CXX_LIBRARY_RTTI_COMDAT hook_bool_void_false
538
539 /* We make exception information linkonce. */
540 #undef TARGET_USES_WEAK_UNWIND_INFO
541 #define TARGET_USES_WEAK_UNWIND_INFO 1
542
543 /* We need to use a nonlocal label for the start of an EH frame: the
544 Darwin linker requires that a coalesced section start with a label.
545 Unfortunately, it also requires that 'debug' sections don't contain
546 labels. */
547 #undef FRAME_BEGIN_LABEL
548 #define FRAME_BEGIN_LABEL (for_eh ? "EH_frame" : "Lframe")
549
550 /* Emit a label for the FDE corresponding to DECL. EMPTY means
551 emit a label for an empty FDE. */
552 #define TARGET_ASM_EMIT_UNWIND_LABEL darwin_emit_unwind_label
553
554 /* Emit a label to separate the exception table. */
555 #define TARGET_ASM_EMIT_EXCEPT_TABLE_LABEL darwin_emit_except_table_label
556
557 /* Our profiling scheme doesn't LP labels and counter words. */
558
559 #define NO_PROFILE_COUNTERS 1
560
561 #undef INIT_SECTION_ASM_OP
562 #define INIT_SECTION_ASM_OP
563
564 #undef INVOKE__main
565
566 #define TARGET_ASM_CONSTRUCTOR machopic_asm_out_constructor
567 #define TARGET_ASM_DESTRUCTOR machopic_asm_out_destructor
568
569 /* Always prefix with an underscore. */
570
571 #define USER_LABEL_PREFIX "_"
572
573 /* A dummy symbol that will be replaced with the function base name. */
574 #define MACHOPIC_FUNCTION_BASE_NAME "<pic base>"
575
576 /* Don't output a .file directive. That is only used by the assembler for
577 error reporting. */
578 #undef TARGET_ASM_FILE_START_FILE_DIRECTIVE
579 #define TARGET_ASM_FILE_START_FILE_DIRECTIVE false
580
581 #undef TARGET_ASM_FILE_END
582 #define TARGET_ASM_FILE_END darwin_file_end
583
584 #define ASM_OUTPUT_SKIP(FILE,SIZE) \
585 fprintf (FILE, "\t.space "HOST_WIDE_INT_PRINT_UNSIGNED"\n", SIZE)
586
587 /* Give ObjC methods pretty symbol names. */
588
589 #undef OBJC_GEN_METHOD_LABEL
590 #define OBJC_GEN_METHOD_LABEL(BUF,IS_INST,CLASS_NAME,CAT_NAME,SEL_NAME,NUM) \
591 do { if (CAT_NAME) \
592 sprintf (BUF, "%c[%s(%s) %s]", (IS_INST) ? '-' : '+', \
593 (CLASS_NAME), (CAT_NAME), (SEL_NAME)); \
594 else \
595 sprintf (BUF, "%c[%s %s]", (IS_INST) ? '-' : '+', \
596 (CLASS_NAME), (SEL_NAME)); \
597 } while (0)
598
599 /* The RTTI data (e.g., __ti4name) is common and public (and static),
600 but it does need to be referenced via indirect PIC data pointers.
601 The machopic_define_symbol calls are telling the machopic subsystem
602 that the name *is* defined in this module, so it doesn't need to
603 make them indirect. */
604
605 #undef ASM_DECLARE_OBJECT_NAME
606 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL) \
607 do { \
608 const char *xname = NAME; \
609 if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF) \
610 xname = IDENTIFIER_POINTER (DECL_NAME (DECL)); \
611 if (! DECL_WEAK (DECL) \
612 && ((TREE_STATIC (DECL) \
613 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
614 || DECL_INITIAL (DECL))) \
615 machopic_define_symbol (DECL_RTL (DECL)); \
616 if ((TREE_STATIC (DECL) \
617 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
618 || DECL_INITIAL (DECL)) \
619 (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false); \
620 ASM_OUTPUT_LABEL (FILE, xname); \
621 /* Darwin doesn't support zero-size objects, so give them a \
622 byte. */ \
623 if (tree_low_cst (DECL_SIZE_UNIT (DECL), 1) == 0) \
624 assemble_zeros (1); \
625 } while (0)
626
627 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
628 do { \
629 const char *xname = NAME; \
630 if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF) \
631 xname = IDENTIFIER_POINTER (DECL_NAME (DECL)); \
632 if (! DECL_WEAK (DECL) \
633 && ((TREE_STATIC (DECL) \
634 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
635 || DECL_INITIAL (DECL))) \
636 machopic_define_symbol (DECL_RTL (DECL)); \
637 if ((TREE_STATIC (DECL) \
638 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
639 || DECL_INITIAL (DECL)) \
640 (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false); \
641 ASM_OUTPUT_LABEL (FILE, xname); \
642 } while (0)
643
644 #define ASM_DECLARE_CONSTANT_NAME(FILE, NAME, EXP, SIZE) \
645 do { \
646 ASM_OUTPUT_LABEL (FILE, NAME); \
647 /* Darwin doesn't support zero-size objects, so give them a \
648 byte. */ \
649 if ((SIZE) == 0) \
650 assemble_zeros (1); \
651 } while (0)
652
653 /* Wrap new method names in quotes so the assembler doesn't gag.
654 Make Objective-C internal symbols local and in doing this, we need
655 to accommodate the name mangling done by c++ on file scope locals. */
656
657
658 int darwin_label_is_anonymous_local_objc_name (const char *name);
659
660 #undef ASM_OUTPUT_LABELREF
661 #define ASM_OUTPUT_LABELREF(FILE,NAME) \
662 do { \
663 const char *xname = (NAME); \
664 if (! strcmp (xname, MACHOPIC_FUNCTION_BASE_NAME)) \
665 machopic_output_function_base_name(FILE); \
666 else if (xname[0] == '&' || xname[0] == '*') \
667 { \
668 int len = strlen (xname); \
669 if (len > 6 && !strcmp ("$stub", xname + len - 5)) \
670 machopic_validate_stub_or_non_lazy_ptr (xname); \
671 else if (len > 7 && !strcmp ("$stub\"", xname + len - 6)) \
672 machopic_validate_stub_or_non_lazy_ptr (xname); \
673 else if (len > 14 && !strcmp ("$non_lazy_ptr", xname + len - 13)) \
674 machopic_validate_stub_or_non_lazy_ptr (xname); \
675 else if (len > 15 && !strcmp ("$non_lazy_ptr\"", xname + len - 14)) \
676 machopic_validate_stub_or_non_lazy_ptr (xname); \
677 if (xname[1] != '"' && name_needs_quotes (&xname[1])) \
678 fprintf (FILE, "\"%s\"", &xname[1]); \
679 else \
680 fputs (&xname[1], FILE); \
681 } \
682 else if (xname[0] == '+' || xname[0] == '-') \
683 fprintf (FILE, "\"%s\"", xname); \
684 else if (darwin_label_is_anonymous_local_objc_name (xname)) \
685 fprintf (FILE, "L%s", xname); \
686 else if (!strncmp (xname, ".objc_class_name_", 17)) \
687 fprintf (FILE, "%s", xname); \
688 else if (xname[0] != '"' && name_needs_quotes (xname)) \
689 fprintf (FILE, "\"%s\"", xname); \
690 else \
691 asm_fprintf (FILE, "%U%s", xname); \
692 } while (0)
693
694 /* Output before executable code. */
695 #undef TEXT_SECTION_ASM_OP
696 #define TEXT_SECTION_ASM_OP "\t.text"
697
698 /* Output before writable data. */
699
700 #undef DATA_SECTION_ASM_OP
701 #define DATA_SECTION_ASM_OP "\t.data"
702
703 #undef ALIGN_ASM_OP
704 #define ALIGN_ASM_OP ".align"
705
706 #undef ASM_OUTPUT_ALIGN
707 #define ASM_OUTPUT_ALIGN(FILE,LOG) \
708 if ((LOG) != 0) \
709 fprintf (FILE, "\t%s %d\n", ALIGN_ASM_OP, (LOG))
710
711 /* Ensure correct alignment of bss data. */
712
713 #undef ASM_OUTPUT_ALIGNED_DECL_LOCAL
714 #define ASM_OUTPUT_ALIGNED_DECL_LOCAL(FILE, DECL, NAME, SIZE, ALIGN) \
715 do { \
716 unsigned HOST_WIDE_INT _new_size = SIZE; \
717 fputs (".lcomm ", (FILE)); \
718 assemble_name ((FILE), (NAME)); \
719 if (_new_size == 0) _new_size = 1; \
720 fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED",%u\n", _new_size, \
721 floor_log2 ((ALIGN) / BITS_PER_UNIT)); \
722 if ((DECL) && ((TREE_STATIC (DECL) \
723 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
724 || DECL_INITIAL (DECL))) \
725 { \
726 (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false); \
727 machopic_define_symbol (DECL_RTL (DECL)); \
728 } \
729 } while (0)
730
731 /* The maximum alignment which the object file format can support in
732 bits. For Mach-O, this is 2^15 bytes. */
733
734 #undef MAX_OFILE_ALIGNMENT
735 #define MAX_OFILE_ALIGNMENT (0x8000 * 8)
736
737 /* Declare the section variables. */
738 #ifndef USED_FOR_TARGET
739 enum darwin_section_enum {
740 #define DEF_SECTION(NAME, FLAGS, DIRECTIVE, OBJC) NAME,
741 #include "darwin-sections.def"
742 #undef DEF_SECTION
743 NUM_DARWIN_SECTIONS
744 };
745 extern GTY(()) section * darwin_sections[NUM_DARWIN_SECTIONS];
746 #endif
747
748 #undef TARGET_ASM_SELECT_SECTION
749 #define TARGET_ASM_SELECT_SECTION machopic_select_section
750 #define USE_SELECT_SECTION_FOR_FUNCTIONS
751
752 #undef TARGET_ASM_SELECT_RTX_SECTION
753 #define TARGET_ASM_SELECT_RTX_SECTION machopic_select_rtx_section
754 #undef TARGET_ASM_UNIQUE_SECTION
755 #define TARGET_ASM_UNIQUE_SECTION darwin_unique_section
756 #undef TARGET_ASM_FUNCTION_RODATA_SECTION
757 #define TARGET_ASM_FUNCTION_RODATA_SECTION default_no_function_rodata_section
758 #undef TARGET_ASM_RELOC_RW_MASK
759 #define TARGET_ASM_RELOC_RW_MASK machopic_reloc_rw_mask
760
761
762 #define ASM_DECLARE_UNRESOLVED_REFERENCE(FILE,NAME) \
763 do { \
764 if (FILE) { \
765 if (MACHOPIC_INDIRECT) \
766 fprintf (FILE, "\t.lazy_reference "); \
767 else \
768 fprintf (FILE, "\t.reference "); \
769 assemble_name (FILE, NAME); \
770 fprintf (FILE, "\n"); \
771 } \
772 } while (0)
773
774 #define ASM_DECLARE_CLASS_REFERENCE(FILE,NAME) \
775 do { \
776 if (FILE) { \
777 fprintf (FILE, "\t"); \
778 assemble_name (FILE, NAME); \
779 fprintf (FILE, "=0\n"); \
780 (*targetm.asm_out.globalize_label) (FILE, NAME); \
781 } \
782 } while (0)
783
784 /* Globalizing directive for a label. */
785 #define GLOBAL_ASM_OP ".globl "
786 #define TARGET_ASM_GLOBALIZE_LABEL darwin_globalize_label
787
788 /* Emit an assembler directive to set visibility for a symbol. Used
789 to support visibility attribute and Darwin's private extern
790 feature. */
791 #undef TARGET_ASM_ASSEMBLE_VISIBILITY
792 #define TARGET_ASM_ASSEMBLE_VISIBILITY darwin_assemble_visibility
793
794 /* Extra attributes for Darwin. */
795 #define SUBTARGET_ATTRIBUTE_TABLE \
796 /* { name, min_len, max_len, decl_req, type_req, fn_type_req, handler } */ \
797 { "apple_kext_compatibility", 0, 0, false, true, false, \
798 darwin_handle_kext_attribute }, \
799 { "weak_import", 0, 0, true, false, false, \
800 darwin_handle_weak_import_attribute }
801
802 #undef ASM_GENERATE_INTERNAL_LABEL
803 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM) \
804 sprintf (LABEL, "*%s%ld", PREFIX, (long)(NUM))
805
806 #undef TARGET_ASM_MARK_DECL_PRESERVED
807 #define TARGET_ASM_MARK_DECL_PRESERVED darwin_mark_decl_preserved
808
809 /* Set on a symbol with SYMBOL_FLAG_FUNCTION or
810 MACHO_SYMBOL_FLAG_VARIABLE to indicate that the function or
811 variable has been defined in this translation unit.
812 When porting Mach-O to new architectures you need to make
813 sure these aren't clobbered by the backend. */
814
815 #define MACHO_SYMBOL_FLAG_VARIABLE (SYMBOL_FLAG_MACH_DEP)
816 #define MACHO_SYMBOL_FLAG_DEFINED ((SYMBOL_FLAG_MACH_DEP) << 1)
817
818 /* Set on a symbol to indicate when fix-and-continue style code
819 generation is being used and the symbol refers to a static symbol
820 that should be rebound from new instances of a translation unit to
821 the original instance of the data. */
822
823 #define MACHO_SYMBOL_STATIC ((SYMBOL_FLAG_MACH_DEP) << 2)
824
825 /* Symbolic names for various things we might know about a symbol. */
826
827 enum machopic_addr_class {
828 MACHOPIC_UNDEFINED,
829 MACHOPIC_DEFINED_DATA,
830 MACHOPIC_UNDEFINED_DATA,
831 MACHOPIC_DEFINED_FUNCTION,
832 MACHOPIC_UNDEFINED_FUNCTION
833 };
834
835 /* Macros defining the various PIC cases. */
836
837 #define MACHO_DYNAMIC_NO_PIC_P (TARGET_DYNAMIC_NO_PIC)
838 #define MACHOPIC_INDIRECT (flag_pic || MACHO_DYNAMIC_NO_PIC_P)
839 #define MACHOPIC_JUST_INDIRECT (MACHO_DYNAMIC_NO_PIC_P)
840 #define MACHOPIC_PURE (flag_pic && ! MACHO_DYNAMIC_NO_PIC_P)
841
842 #undef TARGET_ENCODE_SECTION_INFO
843 #define TARGET_ENCODE_SECTION_INFO darwin_encode_section_info
844 #undef TARGET_STRIP_NAME_ENCODING
845 #define TARGET_STRIP_NAME_ENCODING default_strip_name_encoding
846
847 #define GEN_BINDER_NAME_FOR_STUB(BUF,STUB,STUB_LENGTH) \
848 do { \
849 const char *const stub_ = (STUB); \
850 char *buffer_ = (BUF); \
851 strcpy (buffer_, stub_); \
852 if (stub_[0] == '"') \
853 { \
854 strcpy (buffer_ + (STUB_LENGTH) - 1, "_binder\""); \
855 } \
856 else \
857 { \
858 strcpy (buffer_ + (STUB_LENGTH), "_binder"); \
859 } \
860 } while (0)
861
862 #define GEN_SYMBOL_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH) \
863 do { \
864 const char *const symbol_ = (SYMBOL); \
865 char *buffer_ = (BUF); \
866 if (name_needs_quotes (symbol_) && symbol_[0] != '"') \
867 { \
868 sprintf (buffer_, "\"%s\"", symbol_); \
869 } \
870 else \
871 { \
872 strcpy (buffer_, symbol_); \
873 } \
874 } while (0)
875
876 /* Given a symbol name string, create the lazy pointer version
877 of the symbol name. */
878
879 #define GEN_LAZY_PTR_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH) \
880 do { \
881 const char *symbol_ = (SYMBOL); \
882 char *buffer_ = (BUF); \
883 if (symbol_[0] == '"') \
884 { \
885 strcpy (buffer_, "\"L"); \
886 strcpy (buffer_ + 2, symbol_ + 1); \
887 strcpy (buffer_ + (SYMBOL_LENGTH), "$lazy_ptr\""); \
888 } \
889 else if (name_needs_quotes (symbol_)) \
890 { \
891 strcpy (buffer_, "\"L"); \
892 strcpy (buffer_ + 2, symbol_); \
893 strcpy (buffer_ + (SYMBOL_LENGTH) + 2, "$lazy_ptr\""); \
894 } \
895 else \
896 { \
897 strcpy (buffer_, "L"); \
898 strcpy (buffer_ + 1, symbol_); \
899 strcpy (buffer_ + (SYMBOL_LENGTH) + 1, "$lazy_ptr"); \
900 } \
901 } while (0)
902
903 #define EH_FRAME_SECTION_NAME "__TEXT"
904 #define EH_FRAME_SECTION_ATTR ",coalesced,no_toc+strip_static_syms+live_support"
905
906 /* Java runtime class list. */
907 #define JCR_SECTION_NAME "__DATA,jcr,regular,no_dead_strip"
908
909 #undef ASM_PREFERRED_EH_DATA_FORMAT
910 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL) \
911 (((CODE) == 2 && (GLOBAL) == 1) \
912 ? (DW_EH_PE_pcrel | DW_EH_PE_indirect | DW_EH_PE_sdata4) : \
913 ((CODE) == 1 || (GLOBAL) == 0) ? DW_EH_PE_pcrel : DW_EH_PE_absptr)
914
915 #define ASM_OUTPUT_DWARF_DELTA(FILE,SIZE,LABEL1,LABEL2) \
916 darwin_asm_output_dwarf_delta (FILE, SIZE, LABEL1, LABEL2)
917
918 #define ASM_OUTPUT_DWARF_OFFSET(FILE,SIZE,LABEL,BASE) \
919 darwin_asm_output_dwarf_offset (FILE, SIZE, LABEL, BASE)
920
921 #define ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX(ASM_OUT_FILE, ENCODING, SIZE, ADDR, DONE) \
922 if (ENCODING == ASM_PREFERRED_EH_DATA_FORMAT (2, 1)) { \
923 darwin_non_lazy_pcrel (ASM_OUT_FILE, ADDR); \
924 goto DONE; \
925 }
926
927 /* Experimentally, putting jump tables in text is faster on SPEC.
928 Also this is needed for correctness for coalesced functions. */
929
930 #ifndef JUMP_TABLES_IN_TEXT_SECTION
931 #define JUMP_TABLES_IN_TEXT_SECTION 1
932 #endif
933
934 #define TARGET_TERMINATE_DW2_EH_FRAME_INFO false
935
936 #define TARGET_ASM_INIT_SECTIONS darwin_init_sections
937 #undef TARGET_ASM_NAMED_SECTION
938 #define TARGET_ASM_NAMED_SECTION darwin_asm_named_section
939
940 /* Handle pragma weak and pragma pack. */
941 #define HANDLE_SYSV_PRAGMA 1
942
943 #define HANDLE_PRAGMA_PACK_PUSH_POP 1
944
945 #define DARWIN_REGISTER_TARGET_PRAGMAS() \
946 do { \
947 if (!flag_preprocess_only) \
948 cpp_register_pragma (parse_in, NULL, "mark", \
949 darwin_pragma_ignore, false); \
950 c_register_pragma (0, "options", darwin_pragma_options); \
951 c_register_pragma (0, "segment", darwin_pragma_ignore); \
952 c_register_pragma (0, "unused", darwin_pragma_unused); \
953 c_register_pragma (0, "ms_struct", darwin_pragma_ms_struct); \
954 } while (0)
955
956 #undef ASM_APP_ON
957 #define ASM_APP_ON ""
958 #undef ASM_APP_OFF
959 #define ASM_APP_OFF ""
960
961 void darwin_register_frameworks (const char *, const char *, int);
962 void darwin_register_objc_includes (const char *, const char *, int);
963 #define TARGET_EXTRA_PRE_INCLUDES darwin_register_objc_includes
964 #define TARGET_EXTRA_INCLUDES darwin_register_frameworks
965
966 void add_framework_path (char *);
967 #define TARGET_OPTF add_framework_path
968
969 #define TARGET_POSIX_IO
970
971 /* All new versions of Darwin have C99 functions. */
972
973 #define TARGET_C99_FUNCTIONS 1
974
975 #define WINT_TYPE "int"
976
977 /* Every program on darwin links against libSystem which contains the pthread
978 routines, so there's no need to explicitly call out when doing threaded
979 work. */
980
981 #undef GOMP_SELF_SPECS
982 #define GOMP_SELF_SPECS ""
983
984 /* Darwin can't support anchors until we can cope with the adjustments
985 to size that ASM_DECLARE_OBJECT_NAME and ASM_DECLARE_CONSTANT_NAME
986 when outputting members of an anchor block and the linker can be
987 taught to keep them together or we find some other suitable
988 code-gen technique. */
989
990 #if 0
991 #define TARGET_ASM_OUTPUT_ANCHOR darwin_asm_output_anchor
992 #else
993 #define TARGET_ASM_OUTPUT_ANCHOR NULL
994 #endif
995
996 /* Attempt to turn on execute permission for the stack. This may be
997 used by TARGET_TRAMPOLINE_INIT if the target needs it (that is,
998 if the target machine can change execute permissions on a page).
999
1000 There is no way to query the execute permission of the stack, so
1001 we always issue the mprotect() call.
1002
1003 Unfortunately it is not possible to make this namespace-clean.
1004
1005 Also note that no errors should be emitted by this code; it is
1006 considered dangerous for library calls to send messages to
1007 stdout/stderr. */
1008
1009 #define ENABLE_EXECUTE_STACK \
1010 extern void __enable_execute_stack (void *); \
1011 void \
1012 __enable_execute_stack (void *addr) \
1013 { \
1014 extern int mprotect (void *, size_t, int); \
1015 extern int getpagesize (void); \
1016 static int size; \
1017 static long mask; \
1018 \
1019 char *page, *end; \
1020 \
1021 if (size == 0) \
1022 { \
1023 size = getpagesize(); \
1024 mask = ~((long) size - 1); \
1025 } \
1026 \
1027 page = (char *) (((long) addr) & mask); \
1028 end = (char *) ((((long) (addr + (TARGET_64BIT ? 48 : 40))) & mask) + size); \
1029 \
1030 /* 7 == PROT_READ | PROT_WRITE | PROT_EXEC */ \
1031 (void) mprotect (page, end - page, 7); \
1032 }
1033
1034 /* For Apple KEXTs, we make the constructors return this to match gcc
1035 2.95. */
1036 #define TARGET_CXX_CDTOR_RETURNS_THIS (darwin_kextabi_p)
1037 extern int flag_mkernel;
1038 extern int flag_apple_kext;
1039 #define TARGET_KEXTABI flag_apple_kext
1040
1041 #define TARGET_HAS_TARGETCM 1
1042
1043 #ifndef CROSS_DIRECTORY_STRUCTURE
1044 extern void darwin_default_min_version (int * argc, char *** argv);
1045 #define GCC_DRIVER_HOST_INITIALIZATION \
1046 darwin_default_min_version (&argc, &argv)
1047 #endif /* CROSS_DIRECTORY_STRUCTURE */
1048
1049 /* The Apple assembler and linker do not support constructor priorities. */
1050 #undef SUPPORTS_INIT_PRIORITY
1051 #define SUPPORTS_INIT_PRIORITY 0
1052
1053 #endif /* CONFIG_DARWIN_H */
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