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, 2011
4 Free Software Foundation, Inc.
5 Contributed by Apple Computer Inc.
7 This file is part of GCC.
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)
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.
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.
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/>. */
28 #ifndef CONFIG_DARWIN_H
29 #define CONFIG_DARWIN_H
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. */
38 /* Although NeXT ran on many different architectures, as of Jan 2001
39 the only supported Darwin targets are PowerPC and x86. */
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. */
48 /* Don't assume anything about the header files. */
49 #define NO_IMPLICIT_EXTERN_C
51 /* Suppress g++ attempt to link in the math library automatically. */
52 #define MATH_LIBRARY ""
58 /* Define an empty body for the function do_global_dtors() in libgcc2.c. */
60 #define DO_GLOBAL_DTORS_BODY
62 /* The string value for __SIZE_TYPE__. */
65 #define SIZE_TYPE "long unsigned int"
68 /* Type used for ptrdiff_t, as a string used in a declaration. */
71 #define PTRDIFF_TYPE "int"
76 #define WCHAR_TYPE "int"
77 #undef WCHAR_TYPE_SIZE
78 #define WCHAR_TYPE_SIZE 32
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"
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"
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"
107 #define INTPTR_TYPE "long int"
108 #define UINTPTR_TYPE "long unsigned int"
110 #define SIG_ATOMIC_TYPE "int"
112 /* Default to using the NeXT-style runtime, since that's what is
113 pre-installed on Darwin systems. */
115 #define NEXT_OBJC_RUNTIME
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. */
120 #undef DEFAULT_PCC_STRUCT_RETURN
121 #define DEFAULT_PCC_STRUCT_RETURN 0
123 /* True if pragma ms_struct is in effect. */
124 extern GTY(()) int darwin_ms_struct
;
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"
132 #define DARWIN_CC1_SPEC \
133 "%{findirect-virtual-calls: -fapple-kext} %<findirect-virtual-calls " \
134 "%{fterminated-vtables: -fapple-kext} %<fterminated-vtables " \
135 "%<filelist* %<framework*"
137 #define SUBSUBTARGET_OVERRIDE_OPTIONS \
139 darwin_override_options (); \
142 #define SUBTARGET_C_COMMON_OVERRIDE_OPTIONS do { \
143 /* Sort out ObjC exceptions: If the runtime is NeXT we default to \
144 sjlj for m32 only. */ \
145 if (!global_options_set.x_flag_objc_sjlj_exceptions) \
146 global_options.x_flag_objc_sjlj_exceptions = \
147 flag_next_runtime && !TARGET_64BIT; \
148 if (flag_mkernel || flag_apple_kext) \
150 if (flag_use_cxa_atexit == 2) \
151 flag_use_cxa_atexit = 0; \
152 /* kexts should always be built without the coalesced sections \
153 because the kernel loader doesn't grok such sections. */ \
155 /* No RTTI in kexts. */ \
160 /* Machine dependent cpp options. Don't add more options here, add
161 them to darwin_cpp_builtins in darwin-c.c. */
164 #define CPP_SPEC "%{static:%{!dynamic:-D__STATIC__}}%{!static:-D__DYNAMIC__}" \
165 " %{pthread:-D_REENTRANT}"
167 /* This is mostly a clone of the standard LINK_COMMAND_SPEC, plus
168 precomp, libtool, and fat build additions.
170 In general, random Darwin linker flags should go into LINK_SPEC
171 instead of LINK_COMMAND_SPEC. The command spec is better for
172 specifying the handling of options understood by generic Unix
173 linkers, and for positional arguments like libraries. */
175 #define LINK_COMMAND_SPEC_A \
176 "%{!fdump=*:%{!fsyntax-only:%{!c:%{!M:%{!MM:%{!E:%{!S:\
178 %{flto*:%<fcompare-debug*} \
180 %l %X %{s} %{t} %{Z} %{u*} \
182 %{o*}%{!o:-o a.out} \
183 %{!nostdlib:%{!nostartfiles:%S}} \
184 %{L*} %(link_libgcc) %o %{fprofile-arcs|fprofile-generate*|coverage:-lgcov} \
185 %{fopenmp|ftree-parallelize-loops=*: \
186 %{static|static-libgcc|static-libstdc++|static-libgfortran: libgomp.a%s; : -lgomp } } \
187 %{!nostdlib:%{!nodefaultlibs:\
188 %(link_ssp) %(link_gcc_c_sequence)\
190 %{!nostdlib:%{!nostartfiles:%E}} %{T*} %{F*} }}}}}}}"
192 #define DSYMUTIL "\ndsymutil"
194 #define DSYMUTIL_SPEC \
195 "%{!fdump=*:%{!fsyntax-only:%{!c:%{!M:%{!MM:%{!E:%{!S:\
197 %{gdwarf-2:%{!gstabs*:%{!g0: -idsym}}}\
198 %{.c|.cc|.C|.cpp|.cp|.c++|.cxx|.CPP|.m|.mm: \
199 %{gdwarf-2:%{!gstabs*:%{!g0: -dsym}}}}}}}}}}}"
201 #define LINK_COMMAND_SPEC LINK_COMMAND_SPEC_A DSYMUTIL_SPEC
203 /* Tell collect2 to run dsymutil for us as necessary. */
204 #define COLLECT_RUN_DSYMUTIL 1
206 /* We only want one instance of %G, since libSystem (Darwin's -lc) does not depend
208 #undef LINK_GCC_C_SEQUENCE_SPEC
209 #define LINK_GCC_C_SEQUENCE_SPEC "%G %L"
211 #ifdef TARGET_SYSTEM_ROOT
212 #define LINK_SYSROOT_SPEC \
213 "%{isysroot*:-syslibroot %*;:-syslibroot " TARGET_SYSTEM_ROOT "}"
215 #define LINK_SYSROOT_SPEC "%{isysroot*:-syslibroot %*}"
218 /* Please keep the random linker options in alphabetical order (modulo
219 'Z' and 'no' prefixes). Note that options taking arguments may appear
220 multiple times on a command line with different arguments each time,
221 so put a * after their names so all of them get passed. */
223 "%{static}%{!static:-dynamic} \
224 %:remove-outfile(-ldl) \
225 %:remove-outfile(-lm) \
226 %:remove-outfile(-lpthread) \
227 %{fgnu-runtime: %{static|static-libgcc: \
228 %:replace-outfile(-lobjc libobjc-gnu.a%s); \
229 :%:replace-outfile(-lobjc -lobjc-gnu ) } }\
230 %{static|static-libgcc|static-libgfortran:%:replace-outfile(-lgfortran libgfortran.a%s)}\
231 %{static|static-libgcc|static-libstdc++|static-libgfortran:%:replace-outfile(-lgomp libgomp.a%s)}\
232 %{static|static-libgcc|static-libstdc++:%:replace-outfile(-lstdc++ libstdc++.a%s)}\
234 %{Zforce_cpusubtype_ALL:-arch %(darwin_arch) -force_cpusubtype_ALL} \
235 %{!Zforce_cpusubtype_ALL:-arch %(darwin_subarch)} \
237 %{Zbundle_loader*:-bundle_loader %*} \
239 %{compatibility_version*:%e-compatibility_version only allowed with -dynamiclib\
241 %{current_version*:%e-current_version only allowed with -dynamiclib} \
242 %{Zforce_flat_namespace:-force_flat_namespace} \
243 %{Zinstall_name*:%e-install_name only allowed with -dynamiclib} \
244 %{keep_private_externs} \
247 %{Zdynamiclib: -dylib \
248 %{Zbundle:%e-bundle not allowed with -dynamiclib} \
249 %{Zbundle_loader*:%e-bundle_loader not allowed with -dynamiclib} \
250 %{client_name*:%e-client_name not allowed with -dynamiclib} \
251 %{compatibility_version*:-dylib_compatibility_version %*} \
252 %{current_version*:-dylib_current_version %*} \
253 %{Zforce_cpusubtype_ALL:-arch %(darwin_arch)} \
254 %{!Zforce_cpusubtype_ALL: -arch %(darwin_subarch)} \
255 %{Zforce_flat_namespace:%e-force_flat_namespace not allowed with -dynamiclib} \
256 %{Zinstall_name*:-dylib_install_name %*} \
257 %{keep_private_externs:%e-keep_private_externs not allowed with -dynamiclib} \
258 %{private_bundle:%e-private_bundle not allowed with -dynamiclib} \
260 %{Zall_load:-all_load} \
261 %{Zallowable_client*:-allowable_client %*} \
262 %{Zbind_at_load:-bind_at_load} \
263 %{Zarch_errors_fatal:-arch_errors_fatal} \
264 %{Zdead_strip:-dead_strip} \
265 %{Zno_dead_strip_inits_and_terms:-no_dead_strip_inits_and_terms} \
266 %{Zdylib_file*:-dylib_file %*} \
267 %{Zdynamic:-dynamic}\
268 %{Zexported_symbols_list*:-exported_symbols_list %*} \
269 %{Zflat_namespace:-flat_namespace} \
270 %{headerpad_max_install_names} \
271 %{Zimage_base*:-image_base %*} \
273 %{!mmacosx-version-min=*:-macosx_version_min %(darwin_minversion)} \
274 %{mmacosx-version-min=*:-macosx_version_min %*} \
276 %{Zmulti_module:-multi_module} %{Zsingle_module:-single_module} \
277 %{Zmultiply_defined*:-multiply_defined %*} \
278 %{!Zmultiply_defined*:%{shared-libgcc: \
279 %:version-compare(< 10.5 mmacosx-version-min= -multiply_defined) \
280 %:version-compare(< 10.5 mmacosx-version-min= suppress)}} \
281 %{Zmultiplydefinedunused*:-multiply_defined_unused %*} \
283 %{prebind} %{noprebind} %{nofixprebinding} %{prebind_all_twolevel_modules} \
284 %{read_only_relocs} \
285 %{sectcreate*} %{sectorder*} %{seg1addr*} %{segprot*} \
286 %{Zsegaddr*:-segaddr %*} \
287 %{Zsegs_read_only_addr*:-segs_read_only_addr %*} \
288 %{Zsegs_read_write_addr*:-segs_read_write_addr %*} \
289 %{Zseg_addr_table*: -seg_addr_table %*} \
290 %{Zfn_seg_addr_table_filename*:-seg_addr_table_filename %*} \
291 %{sub_library*} %{sub_umbrella*} \
292 " LINK_SYSROOT_SPEC " \
293 %{twolevel_namespace} %{twolevel_namespace_hints} \
294 %{Zumbrella*: -umbrella %*} \
296 %{Zunexported_symbols_list*:-unexported_symbols_list %*} \
297 %{Zweak_reference_mismatches*:-weak_reference_mismatches %*} \
298 %{!Zweak_reference_mismatches*:-weak_reference_mismatches non-weak} \
302 %{pagezero_size*} %{segs_read_*} %{seglinkedit} %{noseglinkedit} \
303 %{sectalign*} %{sectobjectsymbols*} %{segcreate*} %{whyload} \
304 %{whatsloaded} %{dylinker_install_name*} \
305 %{dylinker} %{Mach} "
308 /* Machine dependent libraries. */
310 #define LIB_SPEC "%{!static:-lSystem}"
312 /* Support -mmacosx-version-min by supplying different (stub) libgcc_s.dylib
313 libraries to link against, and by not linking against libgcc_s on
316 Note that by default, -lgcc_eh is not linked against! This is
317 because in a future version of Darwin the EH frame information may
318 be in a new format, or the fallback routine might be changed; if
319 you want to explicitly link against the static version of those
320 routines, because you know you don't need to unwind through system
321 libraries, you need to explicitly say -static-libgcc.
323 If it is linked against, it has to be before -lgcc, because it may
324 need symbols from -lgcc. */
325 #undef REAL_LIBGCC_SPEC
326 #define REAL_LIBGCC_SPEC \
327 "%{static-libgcc|static: -lgcc_eh -lgcc; \
328 shared-libgcc|fexceptions|fgnu-runtime: \
329 %:version-compare(!> 10.5 mmacosx-version-min= -lgcc_s.10.4) \
330 %:version-compare(>< 10.5 10.6 mmacosx-version-min= -lgcc_s.10.5) \
331 %:version-compare(!> 10.5 mmacosx-version-min= -lgcc_ext.10.4) \
332 %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_ext.10.5) \
334 :%:version-compare(>< 10.3.9 10.5 mmacosx-version-min= -lgcc_s.10.4) \
335 %:version-compare(>< 10.5 10.6 mmacosx-version-min= -lgcc_s.10.5) \
336 %:version-compare(!> 10.5 mmacosx-version-min= -lgcc_ext.10.4) \
337 %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_ext.10.5) \
340 /* We specify crt0.o as -lcrt0.o so that ld will search the library path.
342 crt3.o provides __cxa_atexit on systems that don't have it. Since
343 it's only used with C++, which requires passing -shared-libgcc, key
344 off that to avoid unnecessarily adding a destructor to every
345 powerpc program built. */
347 #undef STARTFILE_SPEC
348 #define STARTFILE_SPEC \
349 "%{Zdynamiclib: %(darwin_dylib1) } \
350 %{!Zdynamiclib:%{Zbundle:%{!static:-lbundle1.o}} \
351 %{!Zbundle:%{pg:%{static:-lgcrt0.o} \
352 %{!static:%{object:-lgcrt0.o} \
353 %{!object:%{preload:-lgcrt0.o} \
354 %{!preload:-lgcrt1.o %(darwin_crt2)}}}} \
355 %{!pg:%{static:-lcrt0.o} \
356 %{!static:%{object:-lcrt0.o} \
357 %{!object:%{preload:-lcrt0.o} \
358 %{!preload: %(darwin_crt1) \
359 %(darwin_crt2)}}}}}} \
360 %{shared-libgcc:%:version-compare(< 10.5 mmacosx-version-min= crt3.o%s)}"
362 /* The native Darwin linker doesn't necessarily place files in the order
363 that they're specified on the link line. Thus, it is pointless
364 to put anything in ENDFILE_SPEC. */
365 /* #define ENDFILE_SPEC "" */
367 #define DARWIN_EXTRA_SPECS \
368 { "darwin_crt1", DARWIN_CRT1_SPEC }, \
369 { "darwin_dylib1", DARWIN_DYLIB1_SPEC }, \
370 { "darwin_minversion", DARWIN_MINVERSION_SPEC },
372 #define DARWIN_DYLIB1_SPEC \
373 "%:version-compare(!> 10.5 mmacosx-version-min= -ldylib1.o) \
374 %:version-compare(>= 10.5 mmacosx-version-min= -ldylib1.10.5.o)"
376 #define DARWIN_CRT1_SPEC \
377 "%:version-compare(!> 10.5 mmacosx-version-min= -lcrt1.o) \
378 %:version-compare(>= 10.5 mmacosx-version-min= -lcrt1.10.5.o)"
380 /* Default Darwin ASM_SPEC, very simple. */
381 #define ASM_SPEC "-arch %(darwin_arch) \
382 %{Zforce_cpusubtype_ALL:-force_cpusubtype_ALL} \
385 /* We still allow output of STABS. */
387 #define DBX_DEBUGGING_INFO 1
389 #define DWARF2_DEBUGGING_INFO 1
390 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
392 #define DEBUG_FRAME_SECTION "__DWARF,__debug_frame,regular,debug"
393 #define DEBUG_INFO_SECTION "__DWARF,__debug_info,regular,debug"
394 #define DEBUG_ABBREV_SECTION "__DWARF,__debug_abbrev,regular,debug"
395 #define DEBUG_ARANGES_SECTION "__DWARF,__debug_aranges,regular,debug"
396 #define DEBUG_MACINFO_SECTION "__DWARF,__debug_macinfo,regular,debug"
397 #define DEBUG_LINE_SECTION "__DWARF,__debug_line,regular,debug"
398 #define DEBUG_LOC_SECTION "__DWARF,__debug_loc,regular,debug"
399 #define DEBUG_PUBNAMES_SECTION "__DWARF,__debug_pubnames,regular,debug"
400 #define DEBUG_PUBTYPES_SECTION "__DWARF,__debug_pubtypes,regular,debug"
401 #define DEBUG_STR_SECTION "__DWARF,__debug_str,regular,debug"
402 #define DEBUG_RANGES_SECTION "__DWARF,__debug_ranges,regular,debug"
404 #define TARGET_WANT_DEBUG_PUB_SECTIONS true
406 /* When generating stabs debugging, use N_BINCL entries. */
408 #define DBX_USE_BINCL
410 /* There is no limit to the length of stabs strings. */
412 #define DBX_CONTIN_LENGTH 0
414 /* gdb needs a null N_SO at the end of each file for scattered loading. */
416 #define DBX_OUTPUT_NULL_N_SO_AT_MAIN_SOURCE_FILE_END
418 /* GCC's definition of 'one_only' is the same as its definition of 'weak'. */
419 #define MAKE_DECL_ONE_ONLY(DECL) (DECL_WEAK (DECL) = 1)
421 /* Mach-O supports 'weak imports', and 'weak definitions' in coalesced
422 sections. machopic_select_section ensures that weak variables go in
423 coalesced sections. Weak aliases (or any other kind of aliases) are
424 not supported. Weak symbols that aren't visible outside the .s file
425 are not supported. */
426 #define ASM_WEAKEN_DECL(FILE, DECL, NAME, ALIAS) \
430 warning (0, "alias definitions not supported in Mach-O; ignored"); \
434 if (! DECL_EXTERNAL (DECL) && TREE_PUBLIC (DECL)) \
435 targetm.asm_out.globalize_label (FILE, NAME); \
436 if (DECL_EXTERNAL (DECL)) \
437 fputs ("\t.weak_reference ", FILE); \
438 else if (lookup_attribute ("weak_import", DECL_ATTRIBUTES (DECL))) \
440 else if (TREE_PUBLIC (DECL)) \
441 fputs ("\t.weak_definition ", FILE); \
444 assemble_name (FILE, NAME); \
445 fputc ('\n', FILE); \
448 /* Darwin has the pthread routines in libSystem, which every program
449 links to, so there's no need for weak-ness for that. */
450 #define GTHREAD_USE_WEAK 0
452 /* The Darwin linker imposes two limitations on common symbols: they
453 can't have hidden visibility, and they can't appear in dylibs. As
454 a consequence, we should never use common symbols to represent
456 #undef USE_COMMON_FOR_ONE_ONLY
457 #define USE_COMMON_FOR_ONE_ONLY 0
459 /* The Darwin linker doesn't want coalesced symbols to appear in
460 a static archive's table of contents. */
461 #undef TARGET_WEAK_NOT_IN_ARCHIVE_TOC
462 #define TARGET_WEAK_NOT_IN_ARCHIVE_TOC 1
464 /* On Darwin, we don't (at the time of writing) have linkonce sections
465 with names, so it's safe to make the class data not comdat. */
466 #define TARGET_CXX_CLASS_DATA_ALWAYS_COMDAT hook_bool_void_false
468 /* For efficiency, on Darwin the RTTI information that is always
469 emitted in the standard C++ library should not be COMDAT. */
470 #define TARGET_CXX_LIBRARY_RTTI_COMDAT hook_bool_void_false
472 /* We make exception information linkonce. */
473 #undef TARGET_USES_WEAK_UNWIND_INFO
474 #define TARGET_USES_WEAK_UNWIND_INFO 1
476 /* We need to use a nonlocal label for the start of an EH frame: the
477 Darwin linker requires that a coalesced section start with a label.
478 Unfortunately, it also requires that 'debug' sections don't contain
480 #undef FRAME_BEGIN_LABEL
481 #define FRAME_BEGIN_LABEL (for_eh ? "EH_frame" : "Lframe")
483 /* Emit a label for the FDE corresponding to DECL. EMPTY means
484 emit a label for an empty FDE. */
485 #define TARGET_ASM_EMIT_UNWIND_LABEL darwin_emit_unwind_label
487 /* Emit a label to separate the exception table. */
488 #define TARGET_ASM_EMIT_EXCEPT_TABLE_LABEL darwin_emit_except_table_label
490 /* Our profiling scheme doesn't LP labels and counter words. */
492 #define NO_PROFILE_COUNTERS 1
494 #undef INIT_SECTION_ASM_OP
495 #define INIT_SECTION_ASM_OP
499 #define TARGET_ASM_CONSTRUCTOR machopic_asm_out_constructor
500 #define TARGET_ASM_DESTRUCTOR machopic_asm_out_destructor
502 /* Always prefix with an underscore. */
504 #define USER_LABEL_PREFIX "_"
506 /* A dummy symbol that will be replaced with the function base name. */
507 #define MACHOPIC_FUNCTION_BASE_NAME "<pic base>"
509 /* Don't output a .file directive. That is only used by the assembler for
511 #undef TARGET_ASM_FILE_START_FILE_DIRECTIVE
512 #define TARGET_ASM_FILE_START_FILE_DIRECTIVE false
514 #undef TARGET_ASM_FILE_END
515 #define TARGET_ASM_FILE_END darwin_file_end
517 /* Because Mach-O relocations have a counter from 1 to 255 for the
518 section number they apply to, it is necessary to output all
519 normal sections before the LTO sections, to make sure that the
520 sections that may have relocations always have a section number
522 #undef TARGET_ASM_LTO_START
523 #define TARGET_ASM_LTO_START darwin_asm_lto_start
524 #undef TARGET_ASM_LTO_END
525 #define TARGET_ASM_LTO_END darwin_asm_lto_end
527 #define ASM_OUTPUT_SKIP(FILE,SIZE) \
528 fprintf (FILE, "\t.space "HOST_WIDE_INT_PRINT_UNSIGNED"\n", SIZE)
530 /* Give ObjC methods pretty symbol names. */
532 #undef OBJC_GEN_METHOD_LABEL
533 #define OBJC_GEN_METHOD_LABEL(BUF,IS_INST,CLASS_NAME,CAT_NAME,SEL_NAME,NUM) \
535 sprintf (BUF, "%c[%s(%s) %s]", (IS_INST) ? '-' : '+', \
536 (CLASS_NAME), (CAT_NAME), (SEL_NAME)); \
538 sprintf (BUF, "%c[%s %s]", (IS_INST) ? '-' : '+', \
539 (CLASS_NAME), (SEL_NAME)); \
542 #undef ASM_DECLARE_OBJECT_NAME
543 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL) \
544 darwin_asm_declare_object_name ((FILE), (NAME), (DECL))
546 /* The RTTI data (e.g., __ti4name) is common and public (and static),
547 but it does need to be referenced via indirect PIC data pointers.
548 The machopic_define_symbol calls are telling the machopic subsystem
549 that the name *is* defined in this module, so it doesn't need to
550 make them indirect. */
552 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
554 const char *xname = NAME; \
555 if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF) \
556 xname = IDENTIFIER_POINTER (DECL_NAME (DECL)); \
557 if (! DECL_WEAK (DECL) \
558 && ((TREE_STATIC (DECL) \
559 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
560 || DECL_INITIAL (DECL))) \
561 machopic_define_symbol (DECL_RTL (DECL)); \
562 if ((TREE_STATIC (DECL) \
563 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
564 || DECL_INITIAL (DECL)) \
565 (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false); \
566 ASM_OUTPUT_FUNCTION_LABEL (FILE, xname, DECL); \
569 #undef TARGET_ASM_DECLARE_CONSTANT_NAME
570 #define TARGET_ASM_DECLARE_CONSTANT_NAME darwin_asm_declare_constant_name
572 /* Wrap new method names in quotes so the assembler doesn't gag.
573 Make Objective-C internal symbols local and in doing this, we need
574 to accommodate the name mangling done by c++ on file scope locals. */
576 int darwin_label_is_anonymous_local_objc_name (const char *name
);
578 #undef ASM_OUTPUT_LABELREF
579 #define ASM_OUTPUT_LABELREF(FILE,NAME) \
581 const char *xname = (NAME); \
582 if (! strcmp (xname, MACHOPIC_FUNCTION_BASE_NAME)) \
583 machopic_output_function_base_name(FILE); \
584 else if (xname[0] == '&' || xname[0] == '*') \
586 int len = strlen (xname); \
587 if (len > 6 && !strcmp ("$stub", xname + len - 5)) \
588 machopic_validate_stub_or_non_lazy_ptr (xname); \
589 else if (len > 7 && !strcmp ("$stub\"", xname + len - 6)) \
590 machopic_validate_stub_or_non_lazy_ptr (xname); \
591 else if (len > 14 && !strcmp ("$non_lazy_ptr", xname + len - 13)) \
592 machopic_validate_stub_or_non_lazy_ptr (xname); \
593 else if (len > 15 && !strcmp ("$non_lazy_ptr\"", xname + len - 14)) \
594 machopic_validate_stub_or_non_lazy_ptr (xname); \
595 if (xname[1] != '"' && name_needs_quotes (&xname[1])) \
596 fprintf (FILE, "\"%s\"", &xname[1]); \
598 fputs (&xname[1], FILE); \
600 else if (xname[0] == '+' || xname[0] == '-') \
601 fprintf (FILE, "\"%s\"", xname); \
602 else if (darwin_label_is_anonymous_local_objc_name (xname)) \
603 fprintf (FILE, "L%s", xname); \
604 else if (!strncmp (xname, ".objc_class_name_", 17)) \
605 fprintf (FILE, "%s", xname); \
606 else if (xname[0] != '"' && name_needs_quotes (xname)) \
607 fprintf (FILE, "\"%s\"", xname); \
609 asm_fprintf (FILE, "%U%s", xname); \
612 /* Output before executable code. */
613 #undef TEXT_SECTION_ASM_OP
614 #define TEXT_SECTION_ASM_OP "\t.text"
616 /* Output before writable data. */
618 #undef DATA_SECTION_ASM_OP
619 #define DATA_SECTION_ASM_OP "\t.data"
622 #define ALIGN_ASM_OP ".align"
624 #undef ASM_OUTPUT_ALIGN
625 #define ASM_OUTPUT_ALIGN(FILE,LOG) \
627 fprintf (FILE, "\t%s\t%d\n", ALIGN_ASM_OP, (LOG))
629 /* The maximum alignment which the object file format can support in
630 bits. For Mach-O, this is 2^15 bytes. */
632 #undef MAX_OFILE_ALIGNMENT
633 #define MAX_OFILE_ALIGNMENT (0x8000 * 8)
635 #define L2_MAX_OFILE_ALIGNMENT 15
637 /* These are the three variants that emit referenced blank space. */
638 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
639 darwin_output_aligned_bss ((FILE), (DECL), (NAME), (SIZE), (ALIGN))
641 #undef ASM_OUTPUT_ALIGNED_DECL_LOCAL
642 #define ASM_OUTPUT_ALIGNED_DECL_LOCAL(FILE, DECL, NAME, SIZE, ALIGN) \
643 darwin_asm_output_aligned_decl_local \
644 ((FILE), (DECL), (NAME), (SIZE), (ALIGN))
646 #undef ASM_OUTPUT_ALIGNED_DECL_COMMON
647 #define ASM_OUTPUT_ALIGNED_DECL_COMMON(FILE, DECL, NAME, SIZE, ALIGN) \
648 darwin_asm_output_aligned_decl_common \
649 ((FILE), (DECL), (NAME), (SIZE), (ALIGN))
651 /* The generic version, archs should over-ride where required. */
652 #define MACHOPIC_NL_SYMBOL_PTR_SECTION ".non_lazy_symbol_pointer"
654 /* Declare the section variables. */
655 #ifndef USED_FOR_TARGET
656 enum darwin_section_enum
{
657 #define DEF_SECTION(NAME, FLAGS, DIRECTIVE, OBJC) NAME,
658 #include "darwin-sections.def"
662 extern GTY(()) section
* darwin_sections
[NUM_DARWIN_SECTIONS
];
665 #undef TARGET_ASM_SELECT_SECTION
666 #define TARGET_ASM_SELECT_SECTION machopic_select_section
668 #undef TARGET_ASM_FUNCTION_SECTION
669 #define TARGET_ASM_FUNCTION_SECTION darwin_function_section
671 #undef TARGET_ASM_FUNCTION_SWITCHED_TEXT_SECTIONS
672 #define TARGET_ASM_FUNCTION_SWITCHED_TEXT_SECTIONS \
673 darwin_function_switched_text_sections
675 #undef TARGET_ASM_SELECT_RTX_SECTION
676 #define TARGET_ASM_SELECT_RTX_SECTION machopic_select_rtx_section
677 #undef TARGET_ASM_UNIQUE_SECTION
678 #define TARGET_ASM_UNIQUE_SECTION darwin_unique_section
679 #undef TARGET_ASM_FUNCTION_RODATA_SECTION
680 #define TARGET_ASM_FUNCTION_RODATA_SECTION default_no_function_rodata_section
681 #undef TARGET_ASM_RELOC_RW_MASK
682 #define TARGET_ASM_RELOC_RW_MASK machopic_reloc_rw_mask
685 #define ASM_DECLARE_UNRESOLVED_REFERENCE(FILE,NAME) \
688 if (MACHOPIC_INDIRECT) \
689 fprintf (FILE, "\t.lazy_reference "); \
691 fprintf (FILE, "\t.reference "); \
692 assemble_name (FILE, NAME); \
693 fprintf (FILE, "\n"); \
697 #define ASM_DECLARE_CLASS_REFERENCE(FILE,NAME) \
700 fprintf (FILE, "\t"); \
701 assemble_name (FILE, NAME); \
702 fprintf (FILE, "=0\n"); \
703 (*targetm.asm_out.globalize_label) (FILE, NAME); \
707 /* Globalizing directive for a label. */
708 #define GLOBAL_ASM_OP "\t.globl "
709 #define TARGET_ASM_GLOBALIZE_LABEL darwin_globalize_label
711 /* Emit an assembler directive to set visibility for a symbol. Used
712 to support visibility attribute and Darwin's private extern
714 #undef TARGET_ASM_ASSEMBLE_VISIBILITY
715 #define TARGET_ASM_ASSEMBLE_VISIBILITY darwin_assemble_visibility
717 /* Extra attributes for Darwin. */
718 #define SUBTARGET_ATTRIBUTE_TABLE \
719 /* { name, min_len, max_len, decl_req, type_req, fn_type_req, handler } */ \
720 { "apple_kext_compatibility", 0, 0, false, true, false, \
721 darwin_handle_kext_attribute }, \
722 { "weak_import", 0, 0, true, false, false, \
723 darwin_handle_weak_import_attribute }
725 #undef ASM_GENERATE_INTERNAL_LABEL
726 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM) \
727 sprintf (LABEL, "*%s%ld", PREFIX, (long)(NUM))
729 #undef TARGET_ASM_MARK_DECL_PRESERVED
730 #define TARGET_ASM_MARK_DECL_PRESERVED darwin_mark_decl_preserved
732 /* Set on a symbol with SYMBOL_FLAG_FUNCTION or
733 MACHO_SYMBOL_FLAG_VARIABLE to indicate that the function or
734 variable has been defined in this translation unit.
735 When porting Mach-O to new architectures you need to make
736 sure these aren't clobbered by the backend. */
738 #define MACHO_SYMBOL_FLAG_VARIABLE (SYMBOL_FLAG_MACH_DEP)
739 #define MACHO_SYMBOL_FLAG_DEFINED ((SYMBOL_FLAG_MACH_DEP) << 1)
741 /* Set on a symbol to indicate when fix-and-continue style code
742 generation is being used and the symbol refers to a static symbol
743 that should be rebound from new instances of a translation unit to
744 the original instance of the data. */
746 #define MACHO_SYMBOL_STATIC ((SYMBOL_FLAG_MACH_DEP) << 2)
748 /* Symbolic names for various things we might know about a symbol. */
750 enum machopic_addr_class
{
752 MACHOPIC_DEFINED_DATA
,
753 MACHOPIC_UNDEFINED_DATA
,
754 MACHOPIC_DEFINED_FUNCTION
,
755 MACHOPIC_UNDEFINED_FUNCTION
758 /* Macros defining the various PIC cases. */
760 #undef MACHO_DYNAMIC_NO_PIC_P
761 #define MACHO_DYNAMIC_NO_PIC_P (TARGET_MACHO_DYNAMIC_NO_PIC)
762 #undef MACHOPIC_INDIRECT
763 #define MACHOPIC_INDIRECT (flag_pic || MACHO_DYNAMIC_NO_PIC_P)
764 #define MACHOPIC_JUST_INDIRECT (MACHO_DYNAMIC_NO_PIC_P)
766 #define MACHOPIC_PURE (flag_pic && ! MACHO_DYNAMIC_NO_PIC_P)
768 #undef TARGET_ENCODE_SECTION_INFO
769 #define TARGET_ENCODE_SECTION_INFO darwin_encode_section_info
770 #undef TARGET_STRIP_NAME_ENCODING
771 #define TARGET_STRIP_NAME_ENCODING default_strip_name_encoding
773 #define GEN_BINDER_NAME_FOR_STUB(BUF,STUB,STUB_LENGTH) \
775 const char *const stub_ = (STUB); \
776 char *buffer_ = (BUF); \
777 strcpy (buffer_, stub_); \
778 if (stub_[0] == '"') \
780 strcpy (buffer_ + (STUB_LENGTH) - 1, "_binder\""); \
784 strcpy (buffer_ + (STUB_LENGTH), "_binder"); \
788 #define GEN_SYMBOL_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH) \
790 const char *const symbol_ = (SYMBOL); \
791 char *buffer_ = (BUF); \
792 if (name_needs_quotes (symbol_) && symbol_[0] != '"') \
794 sprintf (buffer_, "\"%s\"", symbol_); \
798 strcpy (buffer_, symbol_); \
802 /* Given a symbol name string, create the lazy pointer version
803 of the symbol name. */
805 #define GEN_LAZY_PTR_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH) \
807 const char *symbol_ = (SYMBOL); \
808 char *buffer_ = (BUF); \
809 if (symbol_[0] == '"') \
811 strcpy (buffer_, "\"L"); \
812 strcpy (buffer_ + 2, symbol_ + 1); \
813 strcpy (buffer_ + (SYMBOL_LENGTH), "$lazy_ptr\""); \
815 else if (name_needs_quotes (symbol_)) \
817 strcpy (buffer_, "\"L"); \
818 strcpy (buffer_ + 2, symbol_); \
819 strcpy (buffer_ + (SYMBOL_LENGTH) + 2, "$lazy_ptr\""); \
823 strcpy (buffer_, "L"); \
824 strcpy (buffer_ + 1, symbol_); \
825 strcpy (buffer_ + (SYMBOL_LENGTH) + 1, "$lazy_ptr"); \
829 #define EH_FRAME_SECTION_NAME "__TEXT"
830 #define EH_FRAME_SECTION_ATTR ",coalesced,no_toc+strip_static_syms+live_support"
832 /* Java runtime class list. */
833 #define JCR_SECTION_NAME "__DATA,jcr,regular,no_dead_strip"
835 #undef ASM_PREFERRED_EH_DATA_FORMAT
836 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL) \
837 (((CODE) == 2 && (GLOBAL) == 1) \
838 ? (DW_EH_PE_pcrel | DW_EH_PE_indirect | DW_EH_PE_sdata4) : \
839 ((CODE) == 1 || (GLOBAL) == 0) ? DW_EH_PE_pcrel : DW_EH_PE_absptr)
841 #define ASM_OUTPUT_DWARF_DELTA(FILE,SIZE,LABEL1,LABEL2) \
842 darwin_asm_output_dwarf_delta (FILE, SIZE, LABEL1, LABEL2)
844 #define ASM_OUTPUT_DWARF_OFFSET(FILE,SIZE,LABEL,BASE) \
845 darwin_asm_output_dwarf_offset (FILE, SIZE, LABEL, BASE)
847 #define ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX(ASM_OUT_FILE, ENCODING, SIZE, ADDR, DONE) \
848 if (ENCODING == ASM_PREFERRED_EH_DATA_FORMAT (2, 1)) { \
849 darwin_non_lazy_pcrel (ASM_OUT_FILE, ADDR); \
853 /* Experimentally, putting jump tables in text is faster on SPEC.
854 Also this is needed for correctness for coalesced functions. */
856 #ifndef JUMP_TABLES_IN_TEXT_SECTION
857 #define JUMP_TABLES_IN_TEXT_SECTION 1
860 #define TARGET_TERMINATE_DW2_EH_FRAME_INFO false
862 #define TARGET_ASM_INIT_SECTIONS darwin_init_sections
863 #undef TARGET_ASM_NAMED_SECTION
864 #define TARGET_ASM_NAMED_SECTION darwin_asm_named_section
866 #define DARWIN_REGISTER_TARGET_PRAGMAS() \
868 if (!flag_preprocess_only) \
869 cpp_register_pragma (parse_in, NULL, "mark", \
870 darwin_pragma_ignore, false); \
871 c_register_pragma (0, "options", darwin_pragma_options); \
872 c_register_pragma (0, "segment", darwin_pragma_ignore); \
873 c_register_pragma (0, "unused", darwin_pragma_unused); \
874 c_register_pragma (0, "ms_struct", darwin_pragma_ms_struct); \
878 #define ASM_APP_ON ""
880 #define ASM_APP_OFF ""
882 void darwin_register_frameworks (const char *, const char *, int);
883 void darwin_register_objc_includes (const char *, const char *, int);
884 #define TARGET_EXTRA_PRE_INCLUDES darwin_register_objc_includes
885 #define TARGET_EXTRA_INCLUDES darwin_register_frameworks
887 void add_framework_path (char *);
888 #define TARGET_OPTF add_framework_path
890 #define TARGET_POSIX_IO
892 /* All new versions of Darwin have C99 functions. */
894 #define TARGET_C99_FUNCTIONS 1
896 #define WINT_TYPE "int"
898 /* Every program on darwin links against libSystem which contains the pthread
899 routines, so there's no need to explicitly call out when doing threaded
902 #undef GOMP_SELF_SPECS
903 #define GOMP_SELF_SPECS ""
905 /* Darwin disables section anchors by default.
906 They should be enabled per arch where support exists in that arch. */
907 #define TARGET_ASM_OUTPUT_ANCHOR NULL
908 #define DARWIN_SECTION_ANCHORS 0
910 /* Attempt to turn on execute permission for the stack. This may be
911 used by TARGET_TRAMPOLINE_INIT if the target needs it (that is,
912 if the target machine can change execute permissions on a page).
914 There is no way to query the execute permission of the stack, so
915 we always issue the mprotect() call.
917 Unfortunately it is not possible to make this namespace-clean.
919 Also note that no errors should be emitted by this code; it is
920 considered dangerous for library calls to send messages to
923 #define ENABLE_EXECUTE_STACK \
924 extern void __enable_execute_stack (void *); \
926 __enable_execute_stack (void *addr) \
928 extern int mprotect (void *, size_t, int); \
929 extern int getpagesize (void); \
937 size = getpagesize(); \
938 mask = ~((long) size - 1); \
941 page = (char *) (((long) addr) & mask); \
942 end = (char *) ((((long) (addr + (TARGET_64BIT ? 48 : 40))) & mask) + size); \
944 /* 7 == PROT_READ | PROT_WRITE | PROT_EXEC */ \
945 (void) mprotect (page, end - page, 7); \
948 /* For Apple KEXTs, we make the constructors return this to match gcc
950 #define TARGET_CXX_CDTOR_RETURNS_THIS (darwin_kextabi_p)
951 #define TARGET_KEXTABI flag_apple_kext
953 /* We have target-specific builtins. */
954 #define TARGET_FOLD_BUILTIN darwin_fold_builtin
956 #define TARGET_OBJC_CONSTRUCT_STRING_OBJECT \
957 darwin_objc_construct_string
959 #define TARGET_STRING_OBJECT_REF_TYPE_P \
960 darwin_cfstring_ref_p
962 #define TARGET_N_FORMAT_TYPES 1
963 #define TARGET_FORMAT_TYPES darwin_additional_format_types
965 #define TARGET_CHECK_STRING_OBJECT_FORMAT_ARG \
966 darwin_check_cfstring_format_arg
968 #define TARGET_HAS_TARGETCM 1
970 #ifndef USED_FOR_TARGET
971 extern void darwin_driver_init (unsigned int *,struct cl_decoded_option
**);
972 #define GCC_DRIVER_HOST_INITIALIZATION \
973 darwin_driver_init (&decoded_options_count, &decoded_options)
976 /* The Apple assembler and linker do not support constructor priorities. */
977 #undef SUPPORTS_INIT_PRIORITY
978 #define SUPPORTS_INIT_PRIORITY 0
980 #endif /* CONFIG_DARWIN_H */