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Merge from mainline (165734:167278).
[official-gcc/graphite-test-results.git] / gcc / config / darwin.h
blobeb1ff8984c15b2b263caecdce9240f0ad8e69f7a
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 #undef ASM_DECLARE_OBJECT_NAME
533 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL) \
534 darwin_asm_declare_object_name ((FILE), (NAME), (DECL))
535
536 /* The RTTI data (e.g., __ti4name) is common and public (and static),
537 but it does need to be referenced via indirect PIC data pointers.
538 The machopic_define_symbol calls are telling the machopic subsystem
539 that the name *is* defined in this module, so it doesn't need to
540 make them indirect. */
541
542 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
543 do { \
544 const char *xname = NAME; \
545 if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF) \
546 xname = IDENTIFIER_POINTER (DECL_NAME (DECL)); \
547 if (! DECL_WEAK (DECL) \
548 && ((TREE_STATIC (DECL) \
549 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
550 || DECL_INITIAL (DECL))) \
551 machopic_define_symbol (DECL_RTL (DECL)); \
552 if ((TREE_STATIC (DECL) \
553 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
554 || DECL_INITIAL (DECL)) \
555 (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false); \
556 ASM_OUTPUT_FUNCTION_LABEL (FILE, xname, DECL); \
557 } while (0)
558
559 #undef TARGET_ASM_DECLARE_CONSTANT_NAME
560 #define TARGET_ASM_DECLARE_CONSTANT_NAME darwin_asm_declare_constant_name
561
562 /* Wrap new method names in quotes so the assembler doesn't gag.
563 Make Objective-C internal symbols local and in doing this, we need
564 to accommodate the name mangling done by c++ on file scope locals. */
565
566 int darwin_label_is_anonymous_local_objc_name (const char *name);
567
568 #undef ASM_OUTPUT_LABELREF
569 #define ASM_OUTPUT_LABELREF(FILE,NAME) \
570 do { \
571 const char *xname = (NAME); \
572 if (! strcmp (xname, MACHOPIC_FUNCTION_BASE_NAME)) \
573 machopic_output_function_base_name(FILE); \
574 else if (xname[0] == '&' || xname[0] == '*') \
575 { \
576 int len = strlen (xname); \
577 if (len > 6 && !strcmp ("$stub", xname + len - 5)) \
578 machopic_validate_stub_or_non_lazy_ptr (xname); \
579 else if (len > 7 && !strcmp ("$stub\"", xname + len - 6)) \
580 machopic_validate_stub_or_non_lazy_ptr (xname); \
581 else if (len > 14 && !strcmp ("$non_lazy_ptr", xname + len - 13)) \
582 machopic_validate_stub_or_non_lazy_ptr (xname); \
583 else if (len > 15 && !strcmp ("$non_lazy_ptr\"", xname + len - 14)) \
584 machopic_validate_stub_or_non_lazy_ptr (xname); \
585 if (xname[1] != '"' && name_needs_quotes (&xname[1])) \
586 fprintf (FILE, "\"%s\"", &xname[1]); \
587 else \
588 fputs (&xname[1], FILE); \
589 } \
590 else if (xname[0] == '+' || xname[0] == '-') \
591 fprintf (FILE, "\"%s\"", xname); \
592 else if (darwin_label_is_anonymous_local_objc_name (xname)) \
593 fprintf (FILE, "L%s", xname); \
594 else if (!strncmp (xname, ".objc_class_name_", 17)) \
595 fprintf (FILE, "%s", xname); \
596 else if (xname[0] != '"' && name_needs_quotes (xname)) \
597 fprintf (FILE, "\"%s\"", xname); \
598 else \
599 asm_fprintf (FILE, "%U%s", xname); \
600 } while (0)
601
602 /* Output before executable code. */
603 #undef TEXT_SECTION_ASM_OP
604 #define TEXT_SECTION_ASM_OP "\t.text"
605
606 /* Output before writable data. */
607
608 #undef DATA_SECTION_ASM_OP
609 #define DATA_SECTION_ASM_OP "\t.data"
610
611 #undef ALIGN_ASM_OP
612 #define ALIGN_ASM_OP ".align"
613
614 #undef ASM_OUTPUT_ALIGN
615 #define ASM_OUTPUT_ALIGN(FILE,LOG) \
616 if ((LOG) != 0) \
617 fprintf (FILE, "\t%s\t%d\n", ALIGN_ASM_OP, (LOG))
618
619 /* The maximum alignment which the object file format can support in
620 bits. For Mach-O, this is 2^15 bytes. */
621
622 #undef MAX_OFILE_ALIGNMENT
623 #define MAX_OFILE_ALIGNMENT (0x8000 * 8)
624
625 #define L2_MAX_OFILE_ALIGNMENT 15
626
627 /* These are the three variants that emit referenced blank space. */
628 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
629 darwin_output_aligned_bss ((FILE), (DECL), (NAME), (SIZE), (ALIGN))
630
631 #undef ASM_OUTPUT_ALIGNED_DECL_LOCAL
632 #define ASM_OUTPUT_ALIGNED_DECL_LOCAL(FILE, DECL, NAME, SIZE, ALIGN) \
633 darwin_asm_output_aligned_decl_local \
634 ((FILE), (DECL), (NAME), (SIZE), (ALIGN))
635
636 #undef ASM_OUTPUT_ALIGNED_DECL_COMMON
637 #define ASM_OUTPUT_ALIGNED_DECL_COMMON(FILE, DECL, NAME, SIZE, ALIGN) \
638 darwin_asm_output_aligned_decl_common \
639 ((FILE), (DECL), (NAME), (SIZE), (ALIGN))
640
641 /* The generic version, archs should over-ride where required. */
642 #define MACHOPIC_NL_SYMBOL_PTR_SECTION ".non_lazy_symbol_pointer"
643
644 /* Private flag applied to disable section-anchors in a particular section.
645 This needs to be kept in sync with the flags used by varasm.c (defined in
646 output.h). */
647 #define SECTION_NO_ANCHOR 0x2000000
648
649 /* Declare the section variables. */
650 #ifndef USED_FOR_TARGET
651 enum darwin_section_enum {
652 #define DEF_SECTION(NAME, FLAGS, DIRECTIVE, OBJC) NAME,
653 #include "darwin-sections.def"
654 #undef DEF_SECTION
655 NUM_DARWIN_SECTIONS
656 };
657 extern GTY(()) section * darwin_sections[NUM_DARWIN_SECTIONS];
658 #endif
659
660 #undef TARGET_ASM_SELECT_SECTION
661 #define TARGET_ASM_SELECT_SECTION machopic_select_section
662 #define USE_SELECT_SECTION_FOR_FUNCTIONS
663 #undef TARGET_ASM_FUNCTION_SECTION
664 #define TARGET_ASM_FUNCTION_SECTION darwin_function_section
665
666 #undef TARGET_ASM_SELECT_RTX_SECTION
667 #define TARGET_ASM_SELECT_RTX_SECTION machopic_select_rtx_section
668 #undef TARGET_ASM_UNIQUE_SECTION
669 #define TARGET_ASM_UNIQUE_SECTION darwin_unique_section
670 #undef TARGET_ASM_FUNCTION_RODATA_SECTION
671 #define TARGET_ASM_FUNCTION_RODATA_SECTION default_no_function_rodata_section
672 #undef TARGET_ASM_RELOC_RW_MASK
673 #define TARGET_ASM_RELOC_RW_MASK machopic_reloc_rw_mask
674
675
676 #define ASM_DECLARE_UNRESOLVED_REFERENCE(FILE,NAME) \
677 do { \
678 if (FILE) { \
679 if (MACHOPIC_INDIRECT) \
680 fprintf (FILE, "\t.lazy_reference "); \
681 else \
682 fprintf (FILE, "\t.reference "); \
683 assemble_name (FILE, NAME); \
684 fprintf (FILE, "\n"); \
685 } \
686 } while (0)
687
688 #define ASM_DECLARE_CLASS_REFERENCE(FILE,NAME) \
689 do { \
690 if (FILE) { \
691 fprintf (FILE, "\t"); \
692 assemble_name (FILE, NAME); \
693 fprintf (FILE, "=0\n"); \
694 (*targetm.asm_out.globalize_label) (FILE, NAME); \
695 } \
696 } while (0)
697
698 /* Globalizing directive for a label. */
699 #define GLOBAL_ASM_OP "\t.globl "
700 #define TARGET_ASM_GLOBALIZE_LABEL darwin_globalize_label
701
702 /* Emit an assembler directive to set visibility for a symbol. Used
703 to support visibility attribute and Darwin's private extern
704 feature. */
705 #undef TARGET_ASM_ASSEMBLE_VISIBILITY
706 #define TARGET_ASM_ASSEMBLE_VISIBILITY darwin_assemble_visibility
707
708 /* Extra attributes for Darwin. */
709 #define SUBTARGET_ATTRIBUTE_TABLE \
710 /* { name, min_len, max_len, decl_req, type_req, fn_type_req, handler } */ \
711 { "apple_kext_compatibility", 0, 0, false, true, false, \
712 darwin_handle_kext_attribute }, \
713 { "weak_import", 0, 0, true, false, false, \
714 darwin_handle_weak_import_attribute }
715
716 #undef ASM_GENERATE_INTERNAL_LABEL
717 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM) \
718 sprintf (LABEL, "*%s%ld", PREFIX, (long)(NUM))
719
720 #undef TARGET_ASM_MARK_DECL_PRESERVED
721 #define TARGET_ASM_MARK_DECL_PRESERVED darwin_mark_decl_preserved
722
723 /* Set on a symbol with SYMBOL_FLAG_FUNCTION or
724 MACHO_SYMBOL_FLAG_VARIABLE to indicate that the function or
725 variable has been defined in this translation unit.
726 When porting Mach-O to new architectures you need to make
727 sure these aren't clobbered by the backend. */
728
729 #define MACHO_SYMBOL_FLAG_VARIABLE (SYMBOL_FLAG_MACH_DEP)
730 #define MACHO_SYMBOL_FLAG_DEFINED ((SYMBOL_FLAG_MACH_DEP) << 1)
731
732 /* Set on a symbol to indicate when fix-and-continue style code
733 generation is being used and the symbol refers to a static symbol
734 that should be rebound from new instances of a translation unit to
735 the original instance of the data. */
736
737 #define MACHO_SYMBOL_STATIC ((SYMBOL_FLAG_MACH_DEP) << 2)
738
739 /* Symbolic names for various things we might know about a symbol. */
740
741 enum machopic_addr_class {
742 MACHOPIC_UNDEFINED,
743 MACHOPIC_DEFINED_DATA,
744 MACHOPIC_UNDEFINED_DATA,
745 MACHOPIC_DEFINED_FUNCTION,
746 MACHOPIC_UNDEFINED_FUNCTION
747 };
748
749 /* Macros defining the various PIC cases. */
750
751 #undef MACHO_DYNAMIC_NO_PIC_P
752 #define MACHO_DYNAMIC_NO_PIC_P (TARGET_MACHO_DYNAMIC_NO_PIC)
753 #undef MACHOPIC_INDIRECT
754 #define MACHOPIC_INDIRECT (flag_pic || MACHO_DYNAMIC_NO_PIC_P)
755 #define MACHOPIC_JUST_INDIRECT (MACHO_DYNAMIC_NO_PIC_P)
756 #undef MACHOPIC_PURE
757 #define MACHOPIC_PURE (flag_pic && ! MACHO_DYNAMIC_NO_PIC_P)
758
759 #undef TARGET_ENCODE_SECTION_INFO
760 #define TARGET_ENCODE_SECTION_INFO darwin_encode_section_info
761 #undef TARGET_STRIP_NAME_ENCODING
762 #define TARGET_STRIP_NAME_ENCODING default_strip_name_encoding
763
764 #define GEN_BINDER_NAME_FOR_STUB(BUF,STUB,STUB_LENGTH) \
765 do { \
766 const char *const stub_ = (STUB); \
767 char *buffer_ = (BUF); \
768 strcpy (buffer_, stub_); \
769 if (stub_[0] == '"') \
770 { \
771 strcpy (buffer_ + (STUB_LENGTH) - 1, "_binder\""); \
772 } \
773 else \
774 { \
775 strcpy (buffer_ + (STUB_LENGTH), "_binder"); \
776 } \
777 } while (0)
778
779 #define GEN_SYMBOL_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH) \
780 do { \
781 const char *const symbol_ = (SYMBOL); \
782 char *buffer_ = (BUF); \
783 if (name_needs_quotes (symbol_) && symbol_[0] != '"') \
784 { \
785 sprintf (buffer_, "\"%s\"", symbol_); \
786 } \
787 else \
788 { \
789 strcpy (buffer_, symbol_); \
790 } \
791 } while (0)
792
793 /* Given a symbol name string, create the lazy pointer version
794 of the symbol name. */
795
796 #define GEN_LAZY_PTR_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH) \
797 do { \
798 const char *symbol_ = (SYMBOL); \
799 char *buffer_ = (BUF); \
800 if (symbol_[0] == '"') \
801 { \
802 strcpy (buffer_, "\"L"); \
803 strcpy (buffer_ + 2, symbol_ + 1); \
804 strcpy (buffer_ + (SYMBOL_LENGTH), "$lazy_ptr\""); \
805 } \
806 else if (name_needs_quotes (symbol_)) \
807 { \
808 strcpy (buffer_, "\"L"); \
809 strcpy (buffer_ + 2, symbol_); \
810 strcpy (buffer_ + (SYMBOL_LENGTH) + 2, "$lazy_ptr\""); \
811 } \
812 else \
813 { \
814 strcpy (buffer_, "L"); \
815 strcpy (buffer_ + 1, symbol_); \
816 strcpy (buffer_ + (SYMBOL_LENGTH) + 1, "$lazy_ptr"); \
817 } \
818 } while (0)
819
820 #define EH_FRAME_SECTION_NAME "__TEXT"
821 #define EH_FRAME_SECTION_ATTR ",coalesced,no_toc+strip_static_syms+live_support"
822
823 /* Java runtime class list. */
824 #define JCR_SECTION_NAME "__DATA,jcr,regular,no_dead_strip"
825
826 #undef ASM_PREFERRED_EH_DATA_FORMAT
827 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL) \
828 (((CODE) == 2 && (GLOBAL) == 1) \
829 ? (DW_EH_PE_pcrel | DW_EH_PE_indirect | DW_EH_PE_sdata4) : \
830 ((CODE) == 1 || (GLOBAL) == 0) ? DW_EH_PE_pcrel : DW_EH_PE_absptr)
831
832 #define ASM_OUTPUT_DWARF_DELTA(FILE,SIZE,LABEL1,LABEL2) \
833 darwin_asm_output_dwarf_delta (FILE, SIZE, LABEL1, LABEL2)
834
835 #define ASM_OUTPUT_DWARF_OFFSET(FILE,SIZE,LABEL,BASE) \
836 darwin_asm_output_dwarf_offset (FILE, SIZE, LABEL, BASE)
837
838 #define ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX(ASM_OUT_FILE, ENCODING, SIZE, ADDR, DONE) \
839 if (ENCODING == ASM_PREFERRED_EH_DATA_FORMAT (2, 1)) { \
840 darwin_non_lazy_pcrel (ASM_OUT_FILE, ADDR); \
841 goto DONE; \
842 }
843
844 /* Experimentally, putting jump tables in text is faster on SPEC.
845 Also this is needed for correctness for coalesced functions. */
846
847 #ifndef JUMP_TABLES_IN_TEXT_SECTION
848 #define JUMP_TABLES_IN_TEXT_SECTION 1
849 #endif
850
851 #define TARGET_TERMINATE_DW2_EH_FRAME_INFO false
852
853 #define TARGET_ASM_INIT_SECTIONS darwin_init_sections
854 #undef TARGET_ASM_NAMED_SECTION
855 #define TARGET_ASM_NAMED_SECTION darwin_asm_named_section
856
857 #define DARWIN_REGISTER_TARGET_PRAGMAS() \
858 do { \
859 if (!flag_preprocess_only) \
860 cpp_register_pragma (parse_in, NULL, "mark", \
861 darwin_pragma_ignore, false); \
862 c_register_pragma (0, "options", darwin_pragma_options); \
863 c_register_pragma (0, "segment", darwin_pragma_ignore); \
864 c_register_pragma (0, "unused", darwin_pragma_unused); \
865 c_register_pragma (0, "ms_struct", darwin_pragma_ms_struct); \
866 } while (0)
867
868 #undef ASM_APP_ON
869 #define ASM_APP_ON ""
870 #undef ASM_APP_OFF
871 #define ASM_APP_OFF ""
872
873 void darwin_register_frameworks (const char *, const char *, int);
874 void darwin_register_objc_includes (const char *, const char *, int);
875 #define TARGET_EXTRA_PRE_INCLUDES darwin_register_objc_includes
876 #define TARGET_EXTRA_INCLUDES darwin_register_frameworks
877
878 void add_framework_path (char *);
879 #define TARGET_OPTF add_framework_path
880
881 #define TARGET_POSIX_IO
882
883 /* All new versions of Darwin have C99 functions. */
884
885 #define TARGET_C99_FUNCTIONS 1
886
887 #define WINT_TYPE "int"
888
889 /* Every program on darwin links against libSystem which contains the pthread
890 routines, so there's no need to explicitly call out when doing threaded
891 work. */
892
893 #undef GOMP_SELF_SPECS
894 #define GOMP_SELF_SPECS ""
895
896 /* Darwin disables section anchors by default.
897 They should be enabled per arch where support exists in that arch. */
898 #define TARGET_ASM_OUTPUT_ANCHOR NULL
899 #define DARWIN_SECTION_ANCHORS 0
900
901 /* Attempt to turn on execute permission for the stack. This may be
902 used by TARGET_TRAMPOLINE_INIT if the target needs it (that is,
903 if the target machine can change execute permissions on a page).
904
905 There is no way to query the execute permission of the stack, so
906 we always issue the mprotect() call.
907
908 Unfortunately it is not possible to make this namespace-clean.
909
910 Also note that no errors should be emitted by this code; it is
911 considered dangerous for library calls to send messages to
912 stdout/stderr. */
913
914 #define ENABLE_EXECUTE_STACK \
915 extern void __enable_execute_stack (void *); \
916 void \
917 __enable_execute_stack (void *addr) \
918 { \
919 extern int mprotect (void *, size_t, int); \
920 extern int getpagesize (void); \
921 static int size; \
922 static long mask; \
923 \
924 char *page, *end; \
925 \
926 if (size == 0) \
927 { \
928 size = getpagesize(); \
929 mask = ~((long) size - 1); \
930 } \
931 \
932 page = (char *) (((long) addr) & mask); \
933 end = (char *) ((((long) (addr + (TARGET_64BIT ? 48 : 40))) & mask) + size); \
934 \
935 /* 7 == PROT_READ | PROT_WRITE | PROT_EXEC */ \
936 (void) mprotect (page, end - page, 7); \
937 }
938
939 /* For Apple KEXTs, we make the constructors return this to match gcc
940 2.95. */
941 #define TARGET_CXX_CDTOR_RETURNS_THIS (darwin_kextabi_p)
942 #define TARGET_KEXTABI flag_apple_kext
943
944 /* We have target-specific builtins. */
945 #define TARGET_FOLD_BUILTIN darwin_fold_builtin
946
947 #define TARGET_OBJC_CONSTRUCT_STRING_OBJECT \
948 darwin_objc_construct_string
949
950 #define TARGET_STRING_OBJECT_REF_TYPE_P \
951 darwin_cfstring_ref_p
952
953 #define TARGET_N_FORMAT_TYPES 1
954 #define TARGET_FORMAT_TYPES darwin_additional_format_types
955
956 #define TARGET_CHECK_STRING_OBJECT_FORMAT_ARG \
957 darwin_check_cfstring_format_arg
958
959 #define TARGET_HAS_TARGETCM 1
960
961 extern void darwin_driver_init (unsigned int *decoded_options_count,
962 struct cl_decoded_option **decoded_options);
963 #define GCC_DRIVER_HOST_INITIALIZATION \
964 darwin_driver_init (&decoded_options_count, &decoded_options)
965
966 /* The Apple assembler and linker do not support constructor priorities. */
967 #undef SUPPORTS_INIT_PRIORITY
968 #define SUPPORTS_INIT_PRIORITY 0
969
970 #endif /* CONFIG_DARWIN_H */
GCC graphite test results