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* config/darwin.h (DWARF2_DEBUGGING_INFO): Define as 1.
[gcc.git] / 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
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*} %{fopenmp:%:include(libgomp.spec)%(link_gomp)} \
276 %(link_libgcc) %o %{fprofile-arcs|fprofile-generate*|coverage:-lgcov} \
277 %{!nostdlib:%{!nodefaultlibs:%(link_ssp) %G %L}} \
278 %{!A:%{!nostdlib:%{!nostartfiles:%E}}} %{T*} %{F*} }}}}}}}\n\
279 %{!fdump=*:%{!fsyntax-only:%{!c:%{!M:%{!MM:%{!E:%{!S:\
280 %{.c|.cc|.C|.cpp|.cp|.c++|.cxx|.CPP|.m|.mm: \
281 %{gdwarf-2:%{!gstabs*:%{!g0: dsymutil %{o*:%*}%{!o:a.out}}}}}}}}}}}}"
282
283 #ifdef TARGET_SYSTEM_ROOT
284 #define LINK_SYSROOT_SPEC \
285 "%{isysroot*:-syslibroot %*;:-syslibroot " TARGET_SYSTEM_ROOT "}"
286 #else
287 #define LINK_SYSROOT_SPEC "%{isysroot*:-syslibroot %*}"
288 #endif
289
290 /* Please keep the random linker options in alphabetical order (modulo
291 'Z' and 'no' prefixes). Note that options taking arguments may appear
292 multiple times on a command line with different arguments each time,
293 so put a * after their names so all of them get passed. */
294 #define LINK_SPEC \
295 "%{static}%{!static:-dynamic} \
296 %{fgnu-runtime:%:replace-outfile(-lobjc -lobjc-gnu)}\
297 %{static|static-libgfortran:%:replace-outfile(-lgfortran libgfortran.a%s)}\
298 %{!Zdynamiclib: \
299 %{Zforce_cpusubtype_ALL:-arch %(darwin_arch) -force_cpusubtype_ALL} \
300 %{!Zforce_cpusubtype_ALL:-arch %(darwin_subarch)} \
301 %{Zbundle:-bundle} \
302 %{Zbundle_loader*:-bundle_loader %*} \
303 %{client_name*} \
304 %{compatibility_version*:%e-compatibility_version only allowed with -dynamiclib\
305 } \
306 %{current_version*:%e-current_version only allowed with -dynamiclib} \
307 %{Zforce_flat_namespace:-force_flat_namespace} \
308 %{Zinstall_name*:%e-install_name only allowed with -dynamiclib} \
309 %{keep_private_externs} \
310 %{private_bundle} \
311 } \
312 %{Zdynamiclib: -dylib \
313 %{Zbundle:%e-bundle not allowed with -dynamiclib} \
314 %{Zbundle_loader*:%e-bundle_loader not allowed with -dynamiclib} \
315 %{client_name*:%e-client_name not allowed with -dynamiclib} \
316 %{compatibility_version*:-dylib_compatibility_version %*} \
317 %{current_version*:-dylib_current_version %*} \
318 %{Zforce_cpusubtype_ALL:-arch %(darwin_arch)} \
319 %{!Zforce_cpusubtype_ALL: -arch %(darwin_subarch)} \
320 %{Zforce_flat_namespace:%e-force_flat_namespace not allowed with -dynamiclib} \
321 %{Zinstall_name*:-dylib_install_name %*} \
322 %{keep_private_externs:%e-keep_private_externs not allowed with -dynamiclib} \
323 %{private_bundle:%e-private_bundle not allowed with -dynamiclib} \
324 } \
325 %{Zall_load:-all_load} \
326 %{Zallowable_client*:-allowable_client %*} \
327 %{Zbind_at_load:-bind_at_load} \
328 %{Zarch_errors_fatal:-arch_errors_fatal} \
329 %{Zdead_strip:-dead_strip} \
330 %{Zno_dead_strip_inits_and_terms:-no_dead_strip_inits_and_terms} \
331 %{Zdylib_file*:-dylib_file %*} \
332 %{Zdynamic:-dynamic}\
333 %{Zexported_symbols_list*:-exported_symbols_list %*} \
334 %{Zflat_namespace:-flat_namespace} \
335 %{headerpad_max_install_names*} \
336 %{Zimage_base*:-image_base %*} \
337 %{Zinit*:-init %*} \
338 %{!mmacosx-version-min=*:-macosx_version_min %(darwin_minversion)} \
339 %{mmacosx-version-min=*:-macosx_version_min %*} \
340 %{nomultidefs} \
341 %{Zmulti_module:-multi_module} %{Zsingle_module:-single_module} \
342 %{Zmultiply_defined*:-multiply_defined %*} \
343 %{!Zmultiply_defined*:%{shared-libgcc: \
344 %:version-compare(< 10.5 mmacosx-version-min= -multiply_defined) \
345 %:version-compare(< 10.5 mmacosx-version-min= suppress)}} \
346 %{Zmultiplydefinedunused*:-multiply_defined_unused %*} \
347 %{fpie:-pie} \
348 %{prebind} %{noprebind} %{nofixprebinding} %{prebind_all_twolevel_modules} \
349 %{read_only_relocs} \
350 %{sectcreate*} %{sectorder*} %{seg1addr*} %{segprot*} \
351 %{Zsegaddr*:-segaddr %*} \
352 %{Zsegs_read_only_addr*:-segs_read_only_addr %*} \
353 %{Zsegs_read_write_addr*:-segs_read_write_addr %*} \
354 %{Zseg_addr_table*: -seg_addr_table %*} \
355 %{Zfn_seg_addr_table_filename*:-seg_addr_table_filename %*} \
356 %{sub_library*} %{sub_umbrella*} \
357 " LINK_SYSROOT_SPEC " \
358 %{twolevel_namespace} %{twolevel_namespace_hints} \
359 %{Zumbrella*: -umbrella %*} \
360 %{undefined*} \
361 %{Zunexported_symbols_list*:-unexported_symbols_list %*} \
362 %{Zweak_reference_mismatches*:-weak_reference_mismatches %*} \
363 %{!Zweak_reference_mismatches*:-weak_reference_mismatches non-weak} \
364 %{X} \
365 %{y*} \
366 %{w} \
367 %{pagezero_size*} %{segs_read_*} %{seglinkedit} %{noseglinkedit} \
368 %{sectalign*} %{sectobjectsymbols*} %{segcreate*} %{whyload} \
369 %{whatsloaded} %{dylinker_install_name*} \
370 %{dylinker} %{Mach} "
371
372
373 /* Machine dependent libraries. */
374
375 #define LIB_SPEC "%{!static:-lSystem}"
376
377 /* Support -mmacosx-version-min by supplying different (stub) libgcc_s.dylib
378 libraries to link against, and by not linking against libgcc_s on
379 earlier-than-10.3.9.
380
381 Note that by default, -lgcc_eh is not linked against! This is
382 because in a future version of Darwin the EH frame information may
383 be in a new format, or the fallback routine might be changed; if
384 you want to explicitly link against the static version of those
385 routines, because you know you don't need to unwind through system
386 libraries, you need to explicitly say -static-libgcc.
387
388 If it is linked against, it has to be before -lgcc, because it may
389 need symbols from -lgcc. */
390 #undef REAL_LIBGCC_SPEC
391 #define REAL_LIBGCC_SPEC \
392 "%{static-libgcc|static: -lgcc_eh -lgcc; \
393 shared-libgcc|fexceptions|fgnu-runtime: \
394 %:version-compare(!> 10.5 mmacosx-version-min= -lgcc_s.10.4) \
395 %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_s.10.5) \
396 -lgcc; \
397 :%:version-compare(>< 10.3.9 10.5 mmacosx-version-min= -lgcc_s.10.4) \
398 %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_s.10.5) \
399 -lgcc}"
400
401 /* We specify crt0.o as -lcrt0.o so that ld will search the library path.
402
403 crt3.o provides __cxa_atexit on systems that don't have it. Since
404 it's only used with C++, which requires passing -shared-libgcc, key
405 off that to avoid unnecessarily adding a destructor to every
406 powerpc program built. */
407
408 #undef STARTFILE_SPEC
409 #define STARTFILE_SPEC \
410 "%{Zdynamiclib: %(darwin_dylib1) } \
411 %{!Zdynamiclib:%{Zbundle:%{!static:-lbundle1.o}} \
412 %{!Zbundle:%{pg:%{static:-lgcrt0.o} \
413 %{!static:%{object:-lgcrt0.o} \
414 %{!object:%{preload:-lgcrt0.o} \
415 %{!preload:-lgcrt1.o %(darwin_crt2)}}}} \
416 %{!pg:%{static:-lcrt0.o} \
417 %{!static:%{object:-lcrt0.o} \
418 %{!object:%{preload:-lcrt0.o} \
419 %{!preload: %(darwin_crt1) \
420 %(darwin_crt2)}}}}}} \
421 %{shared-libgcc:%:version-compare(< 10.5 mmacosx-version-min= crt3.o%s)}"
422
423 /* The native Darwin linker doesn't necessarily place files in the order
424 that they're specified on the link line. Thus, it is pointless
425 to put anything in ENDFILE_SPEC. */
426 /* #define ENDFILE_SPEC "" */
427
428 #define DARWIN_EXTRA_SPECS \
429 { "darwin_crt1", DARWIN_CRT1_SPEC }, \
430 { "darwin_dylib1", DARWIN_DYLIB1_SPEC }, \
431 { "darwin_minversion", DARWIN_MINVERSION_SPEC },
432
433 #define DARWIN_DYLIB1_SPEC \
434 "%:version-compare(!> 10.5 mmacosx-version-min= -ldylib1.o) \
435 %:version-compare(>= 10.5 mmacosx-version-min= -ldylib1.10.5.o)"
436
437 #define DARWIN_CRT1_SPEC \
438 "%:version-compare(!> 10.5 mmacosx-version-min= -lcrt1.o) \
439 %:version-compare(>= 10.5 mmacosx-version-min= -lcrt1.10.5.o)"
440
441 /* Default Darwin ASM_SPEC, very simple. */
442 #define ASM_SPEC "-arch %(darwin_arch) \
443 %{Zforce_cpusubtype_ALL:-force_cpusubtype_ALL}"
444
445 /* We still allow output of STABS. */
446
447 #define DBX_DEBUGGING_INFO 1
448
449 #define DWARF2_DEBUGGING_INFO 1
450 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
451
452 #define DEBUG_FRAME_SECTION "__DWARF,__debug_frame,regular,debug"
453 #define DEBUG_INFO_SECTION "__DWARF,__debug_info,regular,debug"
454 #define DEBUG_ABBREV_SECTION "__DWARF,__debug_abbrev,regular,debug"
455 #define DEBUG_ARANGES_SECTION "__DWARF,__debug_aranges,regular,debug"
456 #define DEBUG_MACINFO_SECTION "__DWARF,__debug_macinfo,regular,debug"
457 #define DEBUG_LINE_SECTION "__DWARF,__debug_line,regular,debug"
458 #define DEBUG_LOC_SECTION "__DWARF,__debug_loc,regular,debug"
459 #define DEBUG_PUBNAMES_SECTION "__DWARF,__debug_pubnames,regular,debug"
460 #define DEBUG_PUBTYPES_SECTION "__DWARF,__debug_pubtypes,regular,debug"
461 #define DEBUG_STR_SECTION "__DWARF,__debug_str,regular,debug"
462 #define DEBUG_RANGES_SECTION "__DWARF,__debug_ranges,regular,debug"
463
464 /* When generating stabs debugging, use N_BINCL entries. */
465
466 #define DBX_USE_BINCL
467
468 /* There is no limit to the length of stabs strings. */
469
470 #define DBX_CONTIN_LENGTH 0
471
472 /* gdb needs a null N_SO at the end of each file for scattered loading. */
473
474 #define DBX_OUTPUT_NULL_N_SO_AT_MAIN_SOURCE_FILE_END
475
476 /* GCC's definition of 'one_only' is the same as its definition of 'weak'. */
477 #define MAKE_DECL_ONE_ONLY(DECL) (DECL_WEAK (DECL) = 1)
478
479 /* Mach-O supports 'weak imports', and 'weak definitions' in coalesced
480 sections. machopic_select_section ensures that weak variables go in
481 coalesced sections. Weak aliases (or any other kind of aliases) are
482 not supported. Weak symbols that aren't visible outside the .s file
483 are not supported. */
484 #define ASM_WEAKEN_DECL(FILE, DECL, NAME, ALIAS) \
485 do { \
486 if (ALIAS) \
487 { \
488 warning (0, "alias definitions not supported in Mach-O; ignored"); \
489 break; \
490 } \
491 \
492 if (! DECL_EXTERNAL (DECL) && TREE_PUBLIC (DECL)) \
493 targetm.asm_out.globalize_label (FILE, NAME); \
494 if (DECL_EXTERNAL (DECL)) \
495 fputs ("\t.weak_reference ", FILE); \
496 else if (! lookup_attribute ("weak", DECL_ATTRIBUTES (DECL)) \
497 && lookup_attribute ("weak_import", DECL_ATTRIBUTES (DECL))) \
498 break; \
499 else if (TREE_PUBLIC (DECL)) \
500 fputs ("\t.weak_definition ", FILE); \
501 else \
502 break; \
503 assemble_name (FILE, NAME); \
504 fputc ('\n', FILE); \
505 } while (0)
506
507 /* Darwin has the pthread routines in libSystem, which every program
508 links to, so there's no need for weak-ness for that. */
509 #define GTHREAD_USE_WEAK 0
510
511 /* The Darwin linker imposes two limitations on common symbols: they
512 can't have hidden visibility, and they can't appear in dylibs. As
513 a consequence, we should never use common symbols to represent
514 vague linkage. */
515 #undef USE_COMMON_FOR_ONE_ONLY
516 #define USE_COMMON_FOR_ONE_ONLY 0
517
518 /* The Darwin linker doesn't want coalesced symbols to appear in
519 a static archive's table of contents. */
520 #undef TARGET_WEAK_NOT_IN_ARCHIVE_TOC
521 #define TARGET_WEAK_NOT_IN_ARCHIVE_TOC 1
522
523 /* On Darwin, we don't (at the time of writing) have linkonce sections
524 with names, so it's safe to make the class data not comdat. */
525 #define TARGET_CXX_CLASS_DATA_ALWAYS_COMDAT hook_bool_void_false
526
527 /* For efficiency, on Darwin the RTTI information that is always
528 emitted in the standard C++ library should not be COMDAT. */
529 #define TARGET_CXX_LIBRARY_RTTI_COMDAT hook_bool_void_false
530
531 /* We make exception information linkonce. */
532 #undef TARGET_USES_WEAK_UNWIND_INFO
533 #define TARGET_USES_WEAK_UNWIND_INFO 1
534
535 /* We need to use a nonlocal label for the start of an EH frame: the
536 Darwin linker requires that a coalesced section start with a label.
537 Unfortunately, it also requires that 'debug' sections don't contain
538 labels. */
539 #undef FRAME_BEGIN_LABEL
540 #define FRAME_BEGIN_LABEL (for_eh ? "EH_frame" : "Lframe")
541
542 /* Emit a label for the FDE corresponding to DECL. EMPTY means
543 emit a label for an empty FDE. */
544 #define TARGET_ASM_EMIT_UNWIND_LABEL darwin_emit_unwind_label
545
546 /* Emit a label to separate the exception table. */
547 #define TARGET_ASM_EMIT_EXCEPT_TABLE_LABEL darwin_emit_except_table_label
548
549 /* Our profiling scheme doesn't LP labels and counter words. */
550
551 #define NO_PROFILE_COUNTERS 1
552
553 #undef INIT_SECTION_ASM_OP
554 #define INIT_SECTION_ASM_OP
555
556 #undef INVOKE__main
557
558 #define TARGET_ASM_CONSTRUCTOR machopic_asm_out_constructor
559 #define TARGET_ASM_DESTRUCTOR machopic_asm_out_destructor
560
561 /* Always prefix with an underscore. */
562
563 #define USER_LABEL_PREFIX "_"
564
565 /* A dummy symbol that will be replaced with the function base name. */
566 #define MACHOPIC_FUNCTION_BASE_NAME "<pic base>"
567
568 /* Don't output a .file directive. That is only used by the assembler for
569 error reporting. */
570 #undef TARGET_ASM_FILE_START_FILE_DIRECTIVE
571 #define TARGET_ASM_FILE_START_FILE_DIRECTIVE false
572
573 #undef TARGET_ASM_FILE_END
574 #define TARGET_ASM_FILE_END darwin_file_end
575
576 #define ASM_OUTPUT_SKIP(FILE,SIZE) \
577 fprintf (FILE, "\t.space "HOST_WIDE_INT_PRINT_UNSIGNED"\n", SIZE)
578
579 /* Give ObjC methods pretty symbol names. */
580
581 #undef OBJC_GEN_METHOD_LABEL
582 #define OBJC_GEN_METHOD_LABEL(BUF,IS_INST,CLASS_NAME,CAT_NAME,SEL_NAME,NUM) \
583 do { if (CAT_NAME) \
584 sprintf (BUF, "%c[%s(%s) %s]", (IS_INST) ? '-' : '+', \
585 (CLASS_NAME), (CAT_NAME), (SEL_NAME)); \
586 else \
587 sprintf (BUF, "%c[%s %s]", (IS_INST) ? '-' : '+', \
588 (CLASS_NAME), (SEL_NAME)); \
589 } while (0)
590
591 /* The RTTI data (e.g., __ti4name) is common and public (and static),
592 but it does need to be referenced via indirect PIC data pointers.
593 The machopic_define_symbol calls are telling the machopic subsystem
594 that the name *is* defined in this module, so it doesn't need to
595 make them indirect. */
596
597 #undef ASM_DECLARE_OBJECT_NAME
598 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL) \
599 do { \
600 const char *xname = NAME; \
601 if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF) \
602 xname = IDENTIFIER_POINTER (DECL_NAME (DECL)); \
603 if (! DECL_WEAK (DECL) \
604 && ((TREE_STATIC (DECL) \
605 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
606 || DECL_INITIAL (DECL))) \
607 machopic_define_symbol (DECL_RTL (DECL)); \
608 if ((TREE_STATIC (DECL) \
609 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
610 || DECL_INITIAL (DECL)) \
611 (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false); \
612 ASM_OUTPUT_LABEL (FILE, xname); \
613 /* Darwin doesn't support zero-size objects, so give them a \
614 byte. */ \
615 if (tree_low_cst (DECL_SIZE_UNIT (DECL), 1) == 0) \
616 assemble_zeros (1); \
617 } while (0)
618
619 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
620 do { \
621 const char *xname = NAME; \
622 if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF) \
623 xname = IDENTIFIER_POINTER (DECL_NAME (DECL)); \
624 if (! DECL_WEAK (DECL) \
625 && ((TREE_STATIC (DECL) \
626 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
627 || DECL_INITIAL (DECL))) \
628 machopic_define_symbol (DECL_RTL (DECL)); \
629 if ((TREE_STATIC (DECL) \
630 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
631 || DECL_INITIAL (DECL)) \
632 (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false); \
633 ASM_OUTPUT_LABEL (FILE, xname); \
634 } while (0)
635
636 #define ASM_DECLARE_CONSTANT_NAME(FILE, NAME, EXP, SIZE) \
637 do { \
638 ASM_OUTPUT_LABEL (FILE, NAME); \
639 /* Darwin doesn't support zero-size objects, so give them a \
640 byte. */ \
641 if ((SIZE) == 0) \
642 assemble_zeros (1); \
643 } while (0)
644
645 /* Wrap new method names in quotes so the assembler doesn't gag.
646 Make Objective-C internal symbols local. */
647
648 #undef ASM_OUTPUT_LABELREF
649 #define ASM_OUTPUT_LABELREF(FILE,NAME) \
650 do { \
651 const char *xname = (NAME); \
652 if (! strcmp (xname, MACHOPIC_FUNCTION_BASE_NAME)) \
653 machopic_output_function_base_name(FILE); \
654 else if (xname[0] == '&' || xname[0] == '*') \
655 { \
656 int len = strlen (xname); \
657 if (len > 6 && !strcmp ("$stub", xname + len - 5)) \
658 machopic_validate_stub_or_non_lazy_ptr (xname); \
659 else if (len > 7 && !strcmp ("$stub\"", xname + len - 6)) \
660 machopic_validate_stub_or_non_lazy_ptr (xname); \
661 else if (len > 14 && !strcmp ("$non_lazy_ptr", xname + len - 13)) \
662 machopic_validate_stub_or_non_lazy_ptr (xname); \
663 else if (len > 15 && !strcmp ("$non_lazy_ptr\"", xname + len - 14)) \
664 machopic_validate_stub_or_non_lazy_ptr (xname); \
665 if (xname[1] != '"' && name_needs_quotes (&xname[1])) \
666 fprintf (FILE, "\"%s\"", &xname[1]); \
667 else \
668 fputs (&xname[1], FILE); \
669 } \
670 else if (xname[0] == '+' || xname[0] == '-') \
671 fprintf (FILE, "\"%s\"", xname); \
672 else if (!strncmp (xname, "_OBJC_", 6)) \
673 fprintf (FILE, "L%s", xname); \
674 else if (!strncmp (xname, ".objc_class_name_", 17)) \
675 fprintf (FILE, "%s", xname); \
676 else if (xname[0] != '"' && name_needs_quotes (xname)) \
677 fprintf (FILE, "\"%s\"", xname); \
678 else \
679 asm_fprintf (FILE, "%U%s", xname); \
680 } while (0)
681
682 /* Output before executable code. */
683 #undef TEXT_SECTION_ASM_OP
684 #define TEXT_SECTION_ASM_OP "\t.text"
685
686 /* Output before writable data. */
687
688 #undef DATA_SECTION_ASM_OP
689 #define DATA_SECTION_ASM_OP "\t.data"
690
691 #undef ALIGN_ASM_OP
692 #define ALIGN_ASM_OP ".align"
693
694 #undef ASM_OUTPUT_ALIGN
695 #define ASM_OUTPUT_ALIGN(FILE,LOG) \
696 if ((LOG) != 0) \
697 fprintf (FILE, "\t%s %d\n", ALIGN_ASM_OP, (LOG))
698
699 /* Ensure correct alignment of bss data. */
700
701 #undef ASM_OUTPUT_ALIGNED_DECL_LOCAL
702 #define ASM_OUTPUT_ALIGNED_DECL_LOCAL(FILE, DECL, NAME, SIZE, ALIGN) \
703 do { \
704 unsigned HOST_WIDE_INT _new_size = SIZE; \
705 fputs (".lcomm ", (FILE)); \
706 assemble_name ((FILE), (NAME)); \
707 if (_new_size == 0) _new_size = 1; \
708 fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED",%u\n", _new_size, \
709 floor_log2 ((ALIGN) / BITS_PER_UNIT)); \
710 if ((DECL) && ((TREE_STATIC (DECL) \
711 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
712 || DECL_INITIAL (DECL))) \
713 { \
714 (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false); \
715 machopic_define_symbol (DECL_RTL (DECL)); \
716 } \
717 } while (0)
718
719 /* The maximum alignment which the object file format can support in
720 bits. For Mach-O, this is 2^15 bytes. */
721
722 #undef MAX_OFILE_ALIGNMENT
723 #define MAX_OFILE_ALIGNMENT (0x8000 * 8)
724
725 /* Declare the section variables. */
726 #ifndef USED_FOR_TARGET
727 enum darwin_section_enum {
728 #define DEF_SECTION(NAME, FLAGS, DIRECTIVE, OBJC) NAME,
729 #include "darwin-sections.def"
730 #undef DEF_SECTION
731 NUM_DARWIN_SECTIONS
732 };
733 extern GTY(()) section * darwin_sections[NUM_DARWIN_SECTIONS];
734 #endif
735
736 #undef TARGET_ASM_SELECT_SECTION
737 #define TARGET_ASM_SELECT_SECTION machopic_select_section
738 #define USE_SELECT_SECTION_FOR_FUNCTIONS
739
740 #undef TARGET_ASM_SELECT_RTX_SECTION
741 #define TARGET_ASM_SELECT_RTX_SECTION machopic_select_rtx_section
742 #undef TARGET_ASM_UNIQUE_SECTION
743 #define TARGET_ASM_UNIQUE_SECTION darwin_unique_section
744 #undef TARGET_ASM_FUNCTION_RODATA_SECTION
745 #define TARGET_ASM_FUNCTION_RODATA_SECTION default_no_function_rodata_section
746 #undef TARGET_ASM_RELOC_RW_MASK
747 #define TARGET_ASM_RELOC_RW_MASK machopic_reloc_rw_mask
748
749
750 #define ASM_DECLARE_UNRESOLVED_REFERENCE(FILE,NAME) \
751 do { \
752 if (FILE) { \
753 if (MACHOPIC_INDIRECT) \
754 fprintf (FILE, "\t.lazy_reference "); \
755 else \
756 fprintf (FILE, "\t.reference "); \
757 assemble_name (FILE, NAME); \
758 fprintf (FILE, "\n"); \
759 } \
760 } while (0)
761
762 #define ASM_DECLARE_CLASS_REFERENCE(FILE,NAME) \
763 do { \
764 if (FILE) { \
765 fprintf (FILE, "\t"); \
766 assemble_name (FILE, NAME); \
767 fprintf (FILE, "=0\n"); \
768 (*targetm.asm_out.globalize_label) (FILE, NAME); \
769 } \
770 } while (0)
771
772 /* Globalizing directive for a label. */
773 #define GLOBAL_ASM_OP ".globl "
774 #define TARGET_ASM_GLOBALIZE_LABEL darwin_globalize_label
775
776 /* Emit an assembler directive to set visibility for a symbol. Used
777 to support visibility attribute and Darwin's private extern
778 feature. */
779 #undef TARGET_ASM_ASSEMBLE_VISIBILITY
780 #define TARGET_ASM_ASSEMBLE_VISIBILITY darwin_assemble_visibility
781
782 /* Extra attributes for Darwin. */
783 #define SUBTARGET_ATTRIBUTE_TABLE \
784 /* { name, min_len, max_len, decl_req, type_req, fn_type_req, handler } */ \
785 { "apple_kext_compatibility", 0, 0, false, true, false, \
786 darwin_handle_kext_attribute }, \
787 { "weak_import", 0, 0, true, false, false, \
788 darwin_handle_weak_import_attribute }
789
790 #undef ASM_GENERATE_INTERNAL_LABEL
791 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM) \
792 sprintf (LABEL, "*%s%ld", PREFIX, (long)(NUM))
793
794 #undef TARGET_ASM_MARK_DECL_PRESERVED
795 #define TARGET_ASM_MARK_DECL_PRESERVED darwin_mark_decl_preserved
796
797 /* Set on a symbol with SYMBOL_FLAG_FUNCTION or
798 MACHO_SYMBOL_FLAG_VARIABLE to indicate that the function or
799 variable has been defined in this translation unit.
800 When porting Mach-O to new architectures you need to make
801 sure these aren't clobbered by the backend. */
802
803 #define MACHO_SYMBOL_FLAG_VARIABLE (SYMBOL_FLAG_MACH_DEP)
804 #define MACHO_SYMBOL_FLAG_DEFINED ((SYMBOL_FLAG_MACH_DEP) << 1)
805
806 /* Set on a symbol to indicate when fix-and-continue style code
807 generation is being used and the symbol refers to a static symbol
808 that should be rebound from new instances of a translation unit to
809 the original instance of the data. */
810
811 #define MACHO_SYMBOL_STATIC ((SYMBOL_FLAG_MACH_DEP) << 2)
812
813 /* Symbolic names for various things we might know about a symbol. */
814
815 enum machopic_addr_class {
816 MACHOPIC_UNDEFINED,
817 MACHOPIC_DEFINED_DATA,
818 MACHOPIC_UNDEFINED_DATA,
819 MACHOPIC_DEFINED_FUNCTION,
820 MACHOPIC_UNDEFINED_FUNCTION
821 };
822
823 /* Macros defining the various PIC cases. */
824
825 #define MACHO_DYNAMIC_NO_PIC_P (TARGET_DYNAMIC_NO_PIC)
826 #define MACHOPIC_INDIRECT (flag_pic || MACHO_DYNAMIC_NO_PIC_P)
827 #define MACHOPIC_JUST_INDIRECT (MACHO_DYNAMIC_NO_PIC_P)
828 #define MACHOPIC_PURE (flag_pic && ! MACHO_DYNAMIC_NO_PIC_P)
829
830 #undef TARGET_ENCODE_SECTION_INFO
831 #define TARGET_ENCODE_SECTION_INFO darwin_encode_section_info
832 #undef TARGET_STRIP_NAME_ENCODING
833 #define TARGET_STRIP_NAME_ENCODING default_strip_name_encoding
834
835 #define GEN_BINDER_NAME_FOR_STUB(BUF,STUB,STUB_LENGTH) \
836 do { \
837 const char *const stub_ = (STUB); \
838 char *buffer_ = (BUF); \
839 strcpy (buffer_, stub_); \
840 if (stub_[0] == '"') \
841 { \
842 strcpy (buffer_ + (STUB_LENGTH) - 1, "_binder\""); \
843 } \
844 else \
845 { \
846 strcpy (buffer_ + (STUB_LENGTH), "_binder"); \
847 } \
848 } while (0)
849
850 #define GEN_SYMBOL_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH) \
851 do { \
852 const char *const symbol_ = (SYMBOL); \
853 char *buffer_ = (BUF); \
854 if (name_needs_quotes (symbol_) && symbol_[0] != '"') \
855 { \
856 sprintf (buffer_, "\"%s\"", symbol_); \
857 } \
858 else \
859 { \
860 strcpy (buffer_, symbol_); \
861 } \
862 } while (0)
863
864 /* Given a symbol name string, create the lazy pointer version
865 of the symbol name. */
866
867 #define GEN_LAZY_PTR_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH) \
868 do { \
869 const char *symbol_ = (SYMBOL); \
870 char *buffer_ = (BUF); \
871 if (symbol_[0] == '"') \
872 { \
873 strcpy (buffer_, "\"L"); \
874 strcpy (buffer_ + 2, symbol_ + 1); \
875 strcpy (buffer_ + (SYMBOL_LENGTH), "$lazy_ptr\""); \
876 } \
877 else if (name_needs_quotes (symbol_)) \
878 { \
879 strcpy (buffer_, "\"L"); \
880 strcpy (buffer_ + 2, symbol_); \
881 strcpy (buffer_ + (SYMBOL_LENGTH) + 2, "$lazy_ptr\""); \
882 } \
883 else \
884 { \
885 strcpy (buffer_, "L"); \
886 strcpy (buffer_ + 1, symbol_); \
887 strcpy (buffer_ + (SYMBOL_LENGTH) + 1, "$lazy_ptr"); \
888 } \
889 } while (0)
890
891 #define EH_FRAME_SECTION_NAME "__TEXT"
892 #define EH_FRAME_SECTION_ATTR ",coalesced,no_toc+strip_static_syms+live_support"
893
894 /* Java runtime class list. */
895 #define JCR_SECTION_NAME "__DATA,jcr,regular,no_dead_strip"
896
897 #undef ASM_PREFERRED_EH_DATA_FORMAT
898 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL) \
899 (((CODE) == 2 && (GLOBAL) == 1) \
900 ? (DW_EH_PE_pcrel | DW_EH_PE_indirect | DW_EH_PE_sdata4) : \
901 ((CODE) == 1 || (GLOBAL) == 0) ? DW_EH_PE_pcrel : DW_EH_PE_absptr)
902
903 #define ASM_OUTPUT_DWARF_DELTA(FILE,SIZE,LABEL1,LABEL2) \
904 darwin_asm_output_dwarf_delta (FILE, SIZE, LABEL1, LABEL2)
905
906 #define ASM_OUTPUT_DWARF_OFFSET(FILE,SIZE,LABEL,BASE) \
907 darwin_asm_output_dwarf_offset (FILE, SIZE, LABEL, BASE)
908
909 #define ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX(ASM_OUT_FILE, ENCODING, SIZE, ADDR, DONE) \
910 if (ENCODING == ASM_PREFERRED_EH_DATA_FORMAT (2, 1)) { \
911 darwin_non_lazy_pcrel (ASM_OUT_FILE, ADDR); \
912 goto DONE; \
913 }
914
915 /* Experimentally, putting jump tables in text is faster on SPEC.
916 Also this is needed for correctness for coalesced functions. */
917
918 #ifndef JUMP_TABLES_IN_TEXT_SECTION
919 #define JUMP_TABLES_IN_TEXT_SECTION 1
920 #endif
921
922 #define TARGET_TERMINATE_DW2_EH_FRAME_INFO false
923
924 #define TARGET_ASM_INIT_SECTIONS darwin_init_sections
925 #undef TARGET_ASM_NAMED_SECTION
926 #define TARGET_ASM_NAMED_SECTION darwin_asm_named_section
927
928 /* Handle pragma weak and pragma pack. */
929 #define HANDLE_SYSV_PRAGMA 1
930
931 #define HANDLE_PRAGMA_PACK_PUSH_POP 1
932
933 #define DARWIN_REGISTER_TARGET_PRAGMAS() \
934 do { \
935 if (!flag_preprocess_only) \
936 cpp_register_pragma (parse_in, NULL, "mark", \
937 darwin_pragma_ignore, false); \
938 c_register_pragma (0, "options", darwin_pragma_options); \
939 c_register_pragma (0, "segment", darwin_pragma_ignore); \
940 c_register_pragma (0, "unused", darwin_pragma_unused); \
941 c_register_pragma (0, "ms_struct", darwin_pragma_ms_struct); \
942 } while (0)
943
944 #undef ASM_APP_ON
945 #define ASM_APP_ON ""
946 #undef ASM_APP_OFF
947 #define ASM_APP_OFF ""
948
949 void darwin_register_frameworks (const char *, const char *, int);
950 void darwin_register_objc_includes (const char *, const char *, int);
951 #define TARGET_EXTRA_PRE_INCLUDES darwin_register_objc_includes
952 #define TARGET_EXTRA_INCLUDES darwin_register_frameworks
953
954 void add_framework_path (char *);
955 #define TARGET_OPTF add_framework_path
956
957 #define TARGET_POSIX_IO
958
959 /* All new versions of Darwin have C99 functions. */
960
961 #define TARGET_C99_FUNCTIONS 1
962
963 #define WINT_TYPE "int"
964
965 /* Every program on darwin links against libSystem which contains the pthread
966 routines, so there's no need to explicitly call out when doing threaded
967 work. */
968
969 #undef GOMP_SELF_SPECS
970 #define GOMP_SELF_SPECS ""
971
972 /* Darwin can't support anchors until we can cope with the adjustments
973 to size that ASM_DECLARE_OBJECT_NAME and ASM_DECLARE_CONSTANT_NAME
974 when outputting members of an anchor block and the linker can be
975 taught to keep them together or we find some other suitable
976 code-gen technique. */
977
978 #if 0
979 #define TARGET_ASM_OUTPUT_ANCHOR darwin_asm_output_anchor
980 #else
981 #define TARGET_ASM_OUTPUT_ANCHOR NULL
982 #endif
983
984 /* Attempt to turn on execute permission for the stack. This may be
985 used by TARGET_TRAMPOLINE_INIT if the target needs it (that is,
986 if the target machine can change execute permissions on a page).
987
988 There is no way to query the execute permission of the stack, so
989 we always issue the mprotect() call.
990
991 Unfortunately it is not possible to make this namespace-clean.
992
993 Also note that no errors should be emitted by this code; it is
994 considered dangerous for library calls to send messages to
995 stdout/stderr. */
996
997 #define ENABLE_EXECUTE_STACK \
998 extern void __enable_execute_stack (void *); \
999 void \
1000 __enable_execute_stack (void *addr) \
1001 { \
1002 extern int mprotect (void *, size_t, int); \
1003 extern int getpagesize (void); \
1004 static int size; \
1005 static long mask; \
1006 \
1007 char *page, *end; \
1008 \
1009 if (size == 0) \
1010 { \
1011 size = getpagesize(); \
1012 mask = ~((long) size - 1); \
1013 } \
1014 \
1015 page = (char *) (((long) addr) & mask); \
1016 end = (char *) ((((long) (addr + (TARGET_64BIT ? 48 : 40))) & mask) + size); \
1017 \
1018 /* 7 == PROT_READ | PROT_WRITE | PROT_EXEC */ \
1019 (void) mprotect (page, end - page, 7); \
1020 }
1021
1022 /* For Apple KEXTs, we make the constructors return this to match gcc
1023 2.95. */
1024 #define TARGET_CXX_CDTOR_RETURNS_THIS (darwin_kextabi_p)
1025 extern int flag_mkernel;
1026 extern int flag_apple_kext;
1027 #define TARGET_KEXTABI flag_apple_kext
1028
1029 #define TARGET_HAS_TARGETCM 1
1030
1031 #ifndef CROSS_DIRECTORY_STRUCTURE
1032 extern void darwin_default_min_version (int * argc, char *** argv);
1033 #define GCC_DRIVER_HOST_INITIALIZATION \
1034 darwin_default_min_version (&argc, &argv)
1035 #endif /* CROSS_DIRECTORY_STRUCTURE */
1036
1037 /* The Apple assembler and linker do not support constructor priorities. */
1038 #undef SUPPORTS_INIT_PRIORITY
1039 #define SUPPORTS_INIT_PRIORITY 0
1040
1041 #endif /* CONFIG_DARWIN_H */