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 /* Unless set, force ABI=2 for NeXT and m64, 0 otherwise. */ \
144 if (!global_options_set.x_flag_objc_abi) \
145 global_options.x_flag_objc_abi \
146 = (flag_next_runtime && TARGET_64BIT) ? 2 : 0; \
147 /* Objective-C family ABI 2 is only valid for next/m64 at present. */ \
148 if (global_options_set.x_flag_objc_abi && flag_next_runtime) \
149 if (TARGET_64BIT && global_options.x_flag_objc_abi < 2) \
150 error_at (UNKNOWN_LOCATION, "%<-fobjc-abi-version%> >= 2 is only" \
151 " supported on %<-m64%> targets for" \
152 " %<-fnext-runtime%>"); \
153 /* Sort out ObjC exceptions: If the runtime is NeXT we default to \
154 sjlj for m32 only. */ \
155 if (!global_options_set.x_flag_objc_sjlj_exceptions) \
156 global_options.x_flag_objc_sjlj_exceptions = \
157 flag_next_runtime && !TARGET_64BIT; \
158 if (flag_mkernel || flag_apple_kext) \
160 if (flag_use_cxa_atexit == 2) \
161 flag_use_cxa_atexit = 0; \
162 /* kexts should always be built without the coalesced sections \
163 because the kernel loader doesn't grok such sections. */ \
165 /* No RTTI in kexts. */ \
170 /* Machine dependent cpp options. Don't add more options here, add
171 them to darwin_cpp_builtins in darwin-c.c. */
174 #define CPP_SPEC "%{static:%{!dynamic:-D__STATIC__}}%{!static:-D__DYNAMIC__}" \
175 " %{pthread:-D_REENTRANT}"
177 /* This is mostly a clone of the standard LINK_COMMAND_SPEC, plus
178 precomp, libtool, and fat build additions.
180 In general, random Darwin linker flags should go into LINK_SPEC
181 instead of LINK_COMMAND_SPEC. The command spec is better for
182 specifying the handling of options understood by generic Unix
183 linkers, and for positional arguments like libraries. */
185 #define LINK_COMMAND_SPEC_A \
186 "%{!fdump=*:%{!fsyntax-only:%{!c:%{!M:%{!MM:%{!E:%{!S:\
189 "%{flto*:%<fcompare-debug*} \
191 %l %X %{s} %{t} %{Z} %{u*} \
193 %{o*}%{!o:-o a.out} \
194 %{!nostdlib:%{!nostartfiles:%S}} \
195 %{L*} %(link_libgcc) %o %{fprofile-arcs|fprofile-generate*|coverage:-lgcov} \
196 %{fopenmp|ftree-parallelize-loops=*: \
197 %{static|static-libgcc|static-libstdc++|static-libgfortran: libgomp.a%s; : -lgomp } } \
198 %{!nostdlib:%{!nodefaultlibs:\
199 %(link_ssp) %(link_gcc_c_sequence)\
201 %{!nostdlib:%{!nostartfiles:%E}} %{T*} %{F*} }}}}}}}"
203 #define DSYMUTIL "\ndsymutil"
205 #define DSYMUTIL_SPEC \
206 "%{!fdump=*:%{!fsyntax-only:%{!c:%{!M:%{!MM:%{!E:%{!S:\
208 %{gdwarf-2:%{!gstabs*:%{!g0: -idsym}}}\
209 %{.c|.cc|.C|.cpp|.cp|.c++|.cxx|.CPP|.m|.mm: \
210 %{gdwarf-2:%{!gstabs*:%{!g0: -dsym}}}}}}}}}}}"
212 #define LINK_COMMAND_SPEC LINK_COMMAND_SPEC_A DSYMUTIL_SPEC
214 /* Tell collect2 to run dsymutil for us as necessary. */
215 #define COLLECT_RUN_DSYMUTIL 1
217 /* We only want one instance of %G, since libSystem (Darwin's -lc) does not depend
219 #undef LINK_GCC_C_SEQUENCE_SPEC
220 #define LINK_GCC_C_SEQUENCE_SPEC "%G %L"
222 #ifdef TARGET_SYSTEM_ROOT
223 #define LINK_SYSROOT_SPEC \
224 "%{isysroot*:-syslibroot %*;:-syslibroot " TARGET_SYSTEM_ROOT "}"
226 #define LINK_SYSROOT_SPEC "%{isysroot*:-syslibroot %*}"
229 /* Please keep the random linker options in alphabetical order (modulo
230 'Z' and 'no' prefixes). Note that options taking arguments may appear
231 multiple times on a command line with different arguments each time,
232 so put a * after their names so all of them get passed. */
234 "%{static}%{!static:-dynamic} \
235 %:remove-outfile(-ldl) \
236 %:remove-outfile(-lm) \
237 %:remove-outfile(-lpthread) \
238 %{fgnu-runtime: %{static|static-libgcc: \
239 %:replace-outfile(-lobjc libobjc-gnu.a%s); \
240 :%:replace-outfile(-lobjc -lobjc-gnu ) } }\
241 %{static|static-libgcc|static-libgfortran:%:replace-outfile(-lgfortran libgfortran.a%s)}\
242 %{static|static-libgcc|static-libstdc++|static-libgfortran:%:replace-outfile(-lgomp libgomp.a%s)}\
243 %{static|static-libgcc|static-libstdc++:%:replace-outfile(-lstdc++ libstdc++.a%s)}\
245 %{Zforce_cpusubtype_ALL:-arch %(darwin_arch) -force_cpusubtype_ALL} \
246 %{!Zforce_cpusubtype_ALL:-arch %(darwin_subarch)} \
248 %{Zbundle_loader*:-bundle_loader %*} \
250 %{compatibility_version*:%e-compatibility_version only allowed with -dynamiclib\
252 %{current_version*:%e-current_version only allowed with -dynamiclib} \
253 %{Zforce_flat_namespace:-force_flat_namespace} \
254 %{Zinstall_name*:%e-install_name only allowed with -dynamiclib} \
255 %{keep_private_externs} \
258 %{Zdynamiclib: -dylib \
259 %{Zbundle:%e-bundle not allowed with -dynamiclib} \
260 %{Zbundle_loader*:%e-bundle_loader not allowed with -dynamiclib} \
261 %{client_name*:%e-client_name not allowed with -dynamiclib} \
262 %{compatibility_version*:-dylib_compatibility_version %*} \
263 %{current_version*:-dylib_current_version %*} \
264 %{Zforce_cpusubtype_ALL:-arch %(darwin_arch)} \
265 %{!Zforce_cpusubtype_ALL: -arch %(darwin_subarch)} \
266 %{Zforce_flat_namespace:%e-force_flat_namespace not allowed with -dynamiclib} \
267 %{Zinstall_name*:-dylib_install_name %*} \
268 %{keep_private_externs:%e-keep_private_externs not allowed with -dynamiclib} \
269 %{private_bundle:%e-private_bundle not allowed with -dynamiclib} \
271 %{Zall_load:-all_load} \
272 %{Zallowable_client*:-allowable_client %*} \
273 %{Zbind_at_load:-bind_at_load} \
274 %{Zarch_errors_fatal:-arch_errors_fatal} \
275 %{Zdead_strip:-dead_strip} \
276 %{Zno_dead_strip_inits_and_terms:-no_dead_strip_inits_and_terms} \
277 %{Zdylib_file*:-dylib_file %*} \
278 %{Zdynamic:-dynamic}\
279 %{Zexported_symbols_list*:-exported_symbols_list %*} \
280 %{Zflat_namespace:-flat_namespace} \
281 %{headerpad_max_install_names} \
282 %{Zimage_base*:-image_base %*} \
284 %{!mmacosx-version-min=*:-macosx_version_min %(darwin_minversion)} \
285 %{mmacosx-version-min=*:-macosx_version_min %*} \
287 %{Zmulti_module:-multi_module} %{Zsingle_module:-single_module} \
288 %{Zmultiply_defined*:-multiply_defined %*} \
289 %{!Zmultiply_defined*:%{shared-libgcc: \
290 %:version-compare(< 10.5 mmacosx-version-min= -multiply_defined) \
291 %:version-compare(< 10.5 mmacosx-version-min= suppress)}} \
292 %{Zmultiplydefinedunused*:-multiply_defined_unused %*} \
294 %{prebind} %{noprebind} %{nofixprebinding} %{prebind_all_twolevel_modules} \
295 %{read_only_relocs} \
296 %{sectcreate*} %{sectorder*} %{seg1addr*} %{segprot*} \
297 %{Zsegaddr*:-segaddr %*} \
298 %{Zsegs_read_only_addr*:-segs_read_only_addr %*} \
299 %{Zsegs_read_write_addr*:-segs_read_write_addr %*} \
300 %{Zseg_addr_table*: -seg_addr_table %*} \
301 %{Zfn_seg_addr_table_filename*:-seg_addr_table_filename %*} \
302 %{sub_library*} %{sub_umbrella*} \
303 " LINK_SYSROOT_SPEC " \
304 %{twolevel_namespace} %{twolevel_namespace_hints} \
305 %{Zumbrella*: -umbrella %*} \
307 %{Zunexported_symbols_list*:-unexported_symbols_list %*} \
308 %{Zweak_reference_mismatches*:-weak_reference_mismatches %*} \
309 %{!Zweak_reference_mismatches*:-weak_reference_mismatches non-weak} \
313 %{pagezero_size*} %{segs_read_*} %{seglinkedit} %{noseglinkedit} \
314 %{sectalign*} %{sectobjectsymbols*} %{segcreate*} %{whyload} \
315 %{whatsloaded} %{dylinker_install_name*} \
316 %{dylinker} %{Mach} "
319 /* Machine dependent libraries. */
321 #define LIB_SPEC "%{!static:-lSystem}"
323 /* Support -mmacosx-version-min by supplying different (stub) libgcc_s.dylib
324 libraries to link against, and by not linking against libgcc_s on
327 Note that by default, -lgcc_eh is not linked against! This is
328 because in a future version of Darwin the EH frame information may
329 be in a new format, or the fallback routine might be changed; if
330 you want to explicitly link against the static version of those
331 routines, because you know you don't need to unwind through system
332 libraries, you need to explicitly say -static-libgcc.
334 If it is linked against, it has to be before -lgcc, because it may
335 need symbols from -lgcc. */
336 #undef REAL_LIBGCC_SPEC
337 #define REAL_LIBGCC_SPEC \
338 "%{static-libgcc|static: -lgcc_eh -lgcc; \
339 shared-libgcc|fexceptions|fgnu-runtime: \
340 %:version-compare(!> 10.5 mmacosx-version-min= -lgcc_s.10.4) \
341 %:version-compare(>< 10.5 10.6 mmacosx-version-min= -lgcc_s.10.5) \
342 %:version-compare(!> 10.5 mmacosx-version-min= -lgcc_ext.10.4) \
343 %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_ext.10.5) \
345 :%:version-compare(>< 10.3.9 10.5 mmacosx-version-min= -lgcc_s.10.4) \
346 %:version-compare(>< 10.5 10.6 mmacosx-version-min= -lgcc_s.10.5) \
347 %:version-compare(!> 10.5 mmacosx-version-min= -lgcc_ext.10.4) \
348 %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_ext.10.5) \
351 /* We specify crt0.o as -lcrt0.o so that ld will search the library path.
353 crt3.o provides __cxa_atexit on systems that don't have it. Since
354 it's only used with C++, which requires passing -shared-libgcc, key
355 off that to avoid unnecessarily adding a destructor to every
356 powerpc program built. */
358 #undef STARTFILE_SPEC
359 #define STARTFILE_SPEC \
360 "%{Zdynamiclib: %(darwin_dylib1) } \
361 %{!Zdynamiclib:%{Zbundle:%{!static:-lbundle1.o}} \
362 %{!Zbundle:%{pg:%{static:-lgcrt0.o} \
363 %{!static:%{object:-lgcrt0.o} \
364 %{!object:%{preload:-lgcrt0.o} \
365 %{!preload:-lgcrt1.o %(darwin_crt2)}}}} \
366 %{!pg:%{static:-lcrt0.o} \
367 %{!static:%{object:-lcrt0.o} \
368 %{!object:%{preload:-lcrt0.o} \
369 %{!preload: %(darwin_crt1) \
370 %(darwin_crt2)}}}}}} \
371 %{shared-libgcc:%:version-compare(< 10.5 mmacosx-version-min= crt3.o%s)}"
373 /* The native Darwin linker doesn't necessarily place files in the order
374 that they're specified on the link line. Thus, it is pointless
375 to put anything in ENDFILE_SPEC. */
376 /* #define ENDFILE_SPEC "" */
378 #define DARWIN_EXTRA_SPECS \
379 { "darwin_crt1", DARWIN_CRT1_SPEC }, \
380 { "darwin_dylib1", DARWIN_DYLIB1_SPEC }, \
381 { "darwin_minversion", DARWIN_MINVERSION_SPEC },
383 #define DARWIN_DYLIB1_SPEC \
384 "%:version-compare(!> 10.5 mmacosx-version-min= -ldylib1.o) \
385 %:version-compare(>= 10.5 mmacosx-version-min= -ldylib1.10.5.o)"
387 #define DARWIN_CRT1_SPEC \
388 "%:version-compare(!> 10.5 mmacosx-version-min= -lcrt1.o) \
389 %:version-compare(>= 10.5 mmacosx-version-min= -lcrt1.10.5.o)"
391 /* Default Darwin ASM_SPEC, very simple. */
392 #define ASM_SPEC "-arch %(darwin_arch) \
393 %{Zforce_cpusubtype_ALL:-force_cpusubtype_ALL} \
396 /* We still allow output of STABS. */
398 #define DBX_DEBUGGING_INFO 1
400 #define DWARF2_DEBUGGING_INFO 1
401 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
403 #define DEBUG_FRAME_SECTION "__DWARF,__debug_frame,regular,debug"
404 #define DEBUG_INFO_SECTION "__DWARF,__debug_info,regular,debug"
405 #define DEBUG_ABBREV_SECTION "__DWARF,__debug_abbrev,regular,debug"
406 #define DEBUG_ARANGES_SECTION "__DWARF,__debug_aranges,regular,debug"
407 #define DEBUG_MACINFO_SECTION "__DWARF,__debug_macinfo,regular,debug"
408 #define DEBUG_LINE_SECTION "__DWARF,__debug_line,regular,debug"
409 #define DEBUG_LOC_SECTION "__DWARF,__debug_loc,regular,debug"
410 #define DEBUG_PUBNAMES_SECTION "__DWARF,__debug_pubnames,regular,debug"
411 #define DEBUG_PUBTYPES_SECTION "__DWARF,__debug_pubtypes,regular,debug"
412 #define DEBUG_STR_SECTION "__DWARF,__debug_str,regular,debug"
413 #define DEBUG_RANGES_SECTION "__DWARF,__debug_ranges,regular,debug"
415 #define TARGET_WANT_DEBUG_PUB_SECTIONS true
417 /* When generating stabs debugging, use N_BINCL entries. */
419 #define DBX_USE_BINCL
421 /* There is no limit to the length of stabs strings. */
423 #define DBX_CONTIN_LENGTH 0
425 /* gdb needs a null N_SO at the end of each file for scattered loading. */
427 #define DBX_OUTPUT_NULL_N_SO_AT_MAIN_SOURCE_FILE_END
429 /* GCC's definition of 'one_only' is the same as its definition of 'weak'. */
430 #define MAKE_DECL_ONE_ONLY(DECL) (DECL_WEAK (DECL) = 1)
432 /* Mach-O supports 'weak imports', and 'weak definitions' in coalesced
433 sections. machopic_select_section ensures that weak variables go in
434 coalesced sections. Weak aliases (or any other kind of aliases) are
435 not supported. Weak symbols that aren't visible outside the .s file
436 are not supported. */
437 #define ASM_WEAKEN_DECL(FILE, DECL, NAME, ALIAS) \
441 warning (0, "alias definitions not supported in Mach-O; ignored"); \
445 if (! DECL_EXTERNAL (DECL) && TREE_PUBLIC (DECL)) \
446 targetm.asm_out.globalize_label (FILE, NAME); \
447 if (DECL_EXTERNAL (DECL)) \
448 fputs ("\t.weak_reference ", FILE); \
449 else if (lookup_attribute ("weak_import", DECL_ATTRIBUTES (DECL))) \
451 else if (TREE_PUBLIC (DECL)) \
452 fputs ("\t.weak_definition ", FILE); \
455 assemble_name (FILE, NAME); \
456 fputc ('\n', FILE); \
459 /* Darwin has the pthread routines in libSystem, which every program
460 links to, so there's no need for weak-ness for that. */
461 #define GTHREAD_USE_WEAK 0
463 /* The Darwin linker imposes two limitations on common symbols: they
464 can't have hidden visibility, and they can't appear in dylibs. As
465 a consequence, we should never use common symbols to represent
467 #undef USE_COMMON_FOR_ONE_ONLY
468 #define USE_COMMON_FOR_ONE_ONLY 0
470 /* The Darwin linker doesn't want coalesced symbols to appear in
471 a static archive's table of contents. */
472 #undef TARGET_WEAK_NOT_IN_ARCHIVE_TOC
473 #define TARGET_WEAK_NOT_IN_ARCHIVE_TOC 1
475 /* On Darwin, we don't (at the time of writing) have linkonce sections
476 with names, so it's safe to make the class data not comdat. */
477 #define TARGET_CXX_CLASS_DATA_ALWAYS_COMDAT hook_bool_void_false
479 /* For efficiency, on Darwin the RTTI information that is always
480 emitted in the standard C++ library should not be COMDAT. */
481 #define TARGET_CXX_LIBRARY_RTTI_COMDAT hook_bool_void_false
483 /* We make exception information linkonce. */
484 #undef TARGET_USES_WEAK_UNWIND_INFO
485 #define TARGET_USES_WEAK_UNWIND_INFO 1
487 /* We need to use a nonlocal label for the start of an EH frame: the
488 Darwin linker requires that a coalesced section start with a label.
489 Unfortunately, it also requires that 'debug' sections don't contain
491 #undef FRAME_BEGIN_LABEL
492 #define FRAME_BEGIN_LABEL (for_eh ? "EH_frame" : "Lframe")
494 /* Emit a label for the FDE corresponding to DECL. EMPTY means
495 emit a label for an empty FDE. */
496 #define TARGET_ASM_EMIT_UNWIND_LABEL darwin_emit_unwind_label
498 /* Emit a label to separate the exception table. */
499 #define TARGET_ASM_EMIT_EXCEPT_TABLE_LABEL darwin_emit_except_table_label
501 /* Our profiling scheme doesn't LP labels and counter words. */
503 #define NO_PROFILE_COUNTERS 1
505 #undef INIT_SECTION_ASM_OP
506 #define INIT_SECTION_ASM_OP
510 #define TARGET_ASM_CONSTRUCTOR machopic_asm_out_constructor
511 #define TARGET_ASM_DESTRUCTOR machopic_asm_out_destructor
513 /* Always prefix with an underscore. */
515 #define USER_LABEL_PREFIX "_"
517 /* A dummy symbol that will be replaced with the function base name. */
518 #define MACHOPIC_FUNCTION_BASE_NAME "<pic base>"
520 /* Don't output a .file directive. That is only used by the assembler for
522 #undef TARGET_ASM_FILE_START_FILE_DIRECTIVE
523 #define TARGET_ASM_FILE_START_FILE_DIRECTIVE false
525 #undef TARGET_ASM_FILE_END
526 #define TARGET_ASM_FILE_END darwin_file_end
528 /* Because Mach-O relocations have a counter from 1 to 255 for the
529 section number they apply to, it is necessary to output all
530 normal sections before the LTO sections, to make sure that the
531 sections that may have relocations always have a section number
533 #undef TARGET_ASM_LTO_START
534 #define TARGET_ASM_LTO_START darwin_asm_lto_start
535 #undef TARGET_ASM_LTO_END
536 #define TARGET_ASM_LTO_END darwin_asm_lto_end
538 #define ASM_OUTPUT_SKIP(FILE,SIZE) \
539 fprintf (FILE, "\t.space "HOST_WIDE_INT_PRINT_UNSIGNED"\n", SIZE)
541 /* Give ObjC methods pretty symbol names. */
543 #undef OBJC_GEN_METHOD_LABEL
544 #define OBJC_GEN_METHOD_LABEL(BUF,IS_INST,CLASS_NAME,CAT_NAME,SEL_NAME,NUM) \
546 sprintf (BUF, "%c[%s(%s) %s]", (IS_INST) ? '-' : '+', \
547 (CLASS_NAME), (CAT_NAME), (SEL_NAME)); \
549 sprintf (BUF, "%c[%s %s]", (IS_INST) ? '-' : '+', \
550 (CLASS_NAME), (SEL_NAME)); \
553 #undef ASM_DECLARE_OBJECT_NAME
554 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL) \
555 darwin_asm_declare_object_name ((FILE), (NAME), (DECL))
557 /* The RTTI data (e.g., __ti4name) is common and public (and static),
558 but it does need to be referenced via indirect PIC data pointers.
559 The machopic_define_symbol calls are telling the machopic subsystem
560 that the name *is* defined in this module, so it doesn't need to
561 make them indirect. */
563 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
565 const char *xname = NAME; \
566 if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF) \
567 xname = IDENTIFIER_POINTER (DECL_NAME (DECL)); \
568 if (! DECL_WEAK (DECL) \
569 && ((TREE_STATIC (DECL) \
570 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
571 || DECL_INITIAL (DECL))) \
572 machopic_define_symbol (DECL_RTL (DECL)); \
573 if ((TREE_STATIC (DECL) \
574 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
575 || DECL_INITIAL (DECL)) \
576 (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false); \
577 ASM_OUTPUT_FUNCTION_LABEL (FILE, xname, DECL); \
580 #undef TARGET_ASM_DECLARE_CONSTANT_NAME
581 #define TARGET_ASM_DECLARE_CONSTANT_NAME darwin_asm_declare_constant_name
583 /* Wrap new method names in quotes so the assembler doesn't gag.
584 Make Objective-C internal symbols local and in doing this, we need
585 to accommodate the name mangling done by c++ on file scope locals. */
587 int darwin_label_is_anonymous_local_objc_name (const char *name);
589 #undef ASM_OUTPUT_LABELREF
590 #define ASM_OUTPUT_LABELREF(FILE,NAME) \
592 const char *xname = (NAME); \
593 if (! strcmp (xname, MACHOPIC_FUNCTION_BASE_NAME)) \
594 machopic_output_function_base_name(FILE); \
595 else if (xname[0] == '&' || xname[0] == '*') \
597 int len = strlen (xname); \
598 if (len > 6 && !strcmp ("$stub", xname + len - 5)) \
599 machopic_validate_stub_or_non_lazy_ptr (xname); \
600 else if (len > 7 && !strcmp ("$stub\"", xname + len - 6)) \
601 machopic_validate_stub_or_non_lazy_ptr (xname); \
602 else if (len > 14 && !strcmp ("$non_lazy_ptr", xname + len - 13)) \
603 machopic_validate_stub_or_non_lazy_ptr (xname); \
604 else if (len > 15 && !strcmp ("$non_lazy_ptr\"", xname + len - 14)) \
605 machopic_validate_stub_or_non_lazy_ptr (xname); \
606 if (xname[1] != '"' && name_needs_quotes (&xname[1])) \
607 fprintf (FILE, "\"%s\"", &xname[1]); \
609 fputs (&xname[1], FILE); \
611 else if (xname[0] == '+' || xname[0] == '-') \
612 fprintf (FILE, "\"%s\"", xname); \
613 else if (darwin_label_is_anonymous_local_objc_name (xname)) \
614 fprintf (FILE, "L%s", xname); \
615 else if (!strncmp (xname, ".objc_class_name_", 17)) \
616 fprintf (FILE, "%s", xname); \
617 else if (xname[0] != '"' && name_needs_quotes (xname)) \
618 fprintf (FILE, "\"%s\"", xname); \
620 asm_fprintf (FILE, "%U%s", xname); \
623 /* Output before executable code. */
624 #undef TEXT_SECTION_ASM_OP
625 #define TEXT_SECTION_ASM_OP "\t.text"
627 /* Output before writable data. */
629 #undef DATA_SECTION_ASM_OP
630 #define DATA_SECTION_ASM_OP "\t.data"
633 #define ALIGN_ASM_OP ".align"
635 #undef ASM_OUTPUT_ALIGN
636 #define ASM_OUTPUT_ALIGN(FILE,LOG) \
638 fprintf (FILE, "\t%s\t%d\n", ALIGN_ASM_OP, (LOG))
640 /* The maximum alignment which the object file format can support in
641 bits. For Mach-O, this is 2^15 bytes. */
643 #undef MAX_OFILE_ALIGNMENT
644 #define MAX_OFILE_ALIGNMENT (0x8000 * 8)
646 #define L2_MAX_OFILE_ALIGNMENT 15
648 /* These are the three variants that emit referenced blank space. */
649 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
650 darwin_output_aligned_bss ((FILE), (DECL), (NAME), (SIZE), (ALIGN))
652 #undef ASM_OUTPUT_ALIGNED_DECL_LOCAL
653 #define ASM_OUTPUT_ALIGNED_DECL_LOCAL(FILE, DECL, NAME, SIZE, ALIGN) \
654 darwin_asm_output_aligned_decl_local \
655 ((FILE), (DECL), (NAME), (SIZE), (ALIGN))
657 #undef ASM_OUTPUT_ALIGNED_DECL_COMMON
658 #define ASM_OUTPUT_ALIGNED_DECL_COMMON(FILE, DECL, NAME, SIZE, ALIGN) \
659 darwin_asm_output_aligned_decl_common \
660 ((FILE), (DECL), (NAME), (SIZE), (ALIGN))
662 /* The generic version, archs should over-ride where required. */
663 #define MACHOPIC_NL_SYMBOL_PTR_SECTION ".non_lazy_symbol_pointer"
665 /* Declare the section variables. */
666 #ifndef USED_FOR_TARGET
667 enum darwin_section_enum {
668 #define DEF_SECTION(NAME, FLAGS, DIRECTIVE, OBJC) NAME,
669 #include "darwin-sections.def"
673 extern GTY(()) section * darwin_sections[NUM_DARWIN_SECTIONS];
676 #undef TARGET_ASM_SELECT_SECTION
677 #define TARGET_ASM_SELECT_SECTION machopic_select_section
679 #undef TARGET_ASM_FUNCTION_SECTION
680 #define TARGET_ASM_FUNCTION_SECTION darwin_function_section
682 #undef TARGET_ASM_FUNCTION_SWITCHED_TEXT_SECTIONS
683 #define TARGET_ASM_FUNCTION_SWITCHED_TEXT_SECTIONS \
684 darwin_function_switched_text_sections
686 #undef TARGET_ASM_SELECT_RTX_SECTION
687 #define TARGET_ASM_SELECT_RTX_SECTION machopic_select_rtx_section
688 #undef TARGET_ASM_UNIQUE_SECTION
689 #define TARGET_ASM_UNIQUE_SECTION darwin_unique_section
690 #undef TARGET_ASM_FUNCTION_RODATA_SECTION
691 #define TARGET_ASM_FUNCTION_RODATA_SECTION default_no_function_rodata_section
692 #undef TARGET_ASM_RELOC_RW_MASK
693 #define TARGET_ASM_RELOC_RW_MASK machopic_reloc_rw_mask
696 #define ASM_DECLARE_UNRESOLVED_REFERENCE(FILE,NAME) \
699 if (MACHOPIC_INDIRECT) \
700 fprintf (FILE, "\t.lazy_reference "); \
702 fprintf (FILE, "\t.reference "); \
703 assemble_name (FILE, NAME); \
704 fprintf (FILE, "\n"); \
708 #define ASM_DECLARE_CLASS_REFERENCE(FILE,NAME) \
711 fprintf (FILE, "\t"); \
712 assemble_name (FILE, NAME); \
713 fprintf (FILE, "=0\n"); \
714 (*targetm.asm_out.globalize_label) (FILE, NAME); \
718 /* Globalizing directive for a label. */
719 #define GLOBAL_ASM_OP "\t.globl "
720 #define TARGET_ASM_GLOBALIZE_LABEL darwin_globalize_label
722 /* Emit an assembler directive to set visibility for a symbol. Used
723 to support visibility attribute and Darwin's private extern
725 #undef TARGET_ASM_ASSEMBLE_VISIBILITY
726 #define TARGET_ASM_ASSEMBLE_VISIBILITY darwin_assemble_visibility
728 /* Extra attributes for Darwin. */
729 #define SUBTARGET_ATTRIBUTE_TABLE \
730 /* { name, min_len, max_len, decl_req, type_req, fn_type_req, handler, \
731 affects_type_identity } */ \
732 { "apple_kext_compatibility", 0, 0, false, true, false, \
733 darwin_handle_kext_attribute, false }, \
734 { "weak_import", 0, 0, true, false, false, \
735 darwin_handle_weak_import_attribute, false }
737 #undef ASM_GENERATE_INTERNAL_LABEL
738 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM) \
739 sprintf (LABEL, "*%s%ld", PREFIX, (long)(NUM))
741 #undef TARGET_ASM_MARK_DECL_PRESERVED
742 #define TARGET_ASM_MARK_DECL_PRESERVED darwin_mark_decl_preserved
744 /* Set on a symbol with SYMBOL_FLAG_FUNCTION or
745 MACHO_SYMBOL_FLAG_VARIABLE to indicate that the function or
746 variable has been defined in this translation unit.
747 When porting Mach-O to new architectures you need to make
748 sure these aren't clobbered by the backend. */
750 #define MACHO_SYMBOL_FLAG_VARIABLE (SYMBOL_FLAG_MACH_DEP)
751 #define MACHO_SYMBOL_FLAG_DEFINED ((SYMBOL_FLAG_MACH_DEP) << 1)
753 /* Set on a symbol to indicate when fix-and-continue style code
754 generation is being used and the symbol refers to a static symbol
755 that should be rebound from new instances of a translation unit to
756 the original instance of the data. */
758 #define MACHO_SYMBOL_STATIC ((SYMBOL_FLAG_MACH_DEP) << 2)
760 /* Symbolic names for various things we might know about a symbol. */
762 enum machopic_addr_class {
764 MACHOPIC_DEFINED_DATA,
765 MACHOPIC_UNDEFINED_DATA,
766 MACHOPIC_DEFINED_FUNCTION,
767 MACHOPIC_UNDEFINED_FUNCTION
770 /* Macros defining the various PIC cases. */
772 #undef MACHO_DYNAMIC_NO_PIC_P
773 #define MACHO_DYNAMIC_NO_PIC_P (TARGET_MACHO_DYNAMIC_NO_PIC)
774 #undef MACHOPIC_INDIRECT
775 #define MACHOPIC_INDIRECT (flag_pic || MACHO_DYNAMIC_NO_PIC_P)
776 #define MACHOPIC_JUST_INDIRECT (MACHO_DYNAMIC_NO_PIC_P)
778 #define MACHOPIC_PURE (flag_pic && ! MACHO_DYNAMIC_NO_PIC_P)
780 #undef TARGET_ENCODE_SECTION_INFO
781 #define TARGET_ENCODE_SECTION_INFO darwin_encode_section_info
782 #undef TARGET_STRIP_NAME_ENCODING
783 #define TARGET_STRIP_NAME_ENCODING default_strip_name_encoding
785 #define GEN_BINDER_NAME_FOR_STUB(BUF,STUB,STUB_LENGTH) \
787 const char *const stub_ = (STUB); \
788 char *buffer_ = (BUF); \
789 strcpy (buffer_, stub_); \
790 if (stub_[0] == '"') \
792 strcpy (buffer_ + (STUB_LENGTH) - 1, "_binder\""); \
796 strcpy (buffer_ + (STUB_LENGTH), "_binder"); \
800 #define GEN_SYMBOL_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH) \
802 const char *const symbol_ = (SYMBOL); \
803 char *buffer_ = (BUF); \
804 if (name_needs_quotes (symbol_) && symbol_[0] != '"') \
806 sprintf (buffer_, "\"%s\"", symbol_); \
810 strcpy (buffer_, symbol_); \
814 /* Given a symbol name string, create the lazy pointer version
815 of the symbol name. */
817 #define GEN_LAZY_PTR_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH) \
819 const char *symbol_ = (SYMBOL); \
820 char *buffer_ = (BUF); \
821 if (symbol_[0] == '"') \
823 strcpy (buffer_, "\"L"); \
824 strcpy (buffer_ + 2, symbol_ + 1); \
825 strcpy (buffer_ + (SYMBOL_LENGTH), "$lazy_ptr\""); \
827 else if (name_needs_quotes (symbol_)) \
829 strcpy (buffer_, "\"L"); \
830 strcpy (buffer_ + 2, symbol_); \
831 strcpy (buffer_ + (SYMBOL_LENGTH) + 2, "$lazy_ptr\""); \
835 strcpy (buffer_, "L"); \
836 strcpy (buffer_ + 1, symbol_); \
837 strcpy (buffer_ + (SYMBOL_LENGTH) + 1, "$lazy_ptr"); \
841 #define EH_FRAME_SECTION_NAME "__TEXT"
842 #define EH_FRAME_SECTION_ATTR ",coalesced,no_toc+strip_static_syms+live_support"
844 /* Java runtime class list. */
845 #define JCR_SECTION_NAME "__DATA,jcr,regular,no_dead_strip"
847 #undef ASM_PREFERRED_EH_DATA_FORMAT
848 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL) \
849 (((CODE) == 2 && (GLOBAL) == 1) \
850 ? (DW_EH_PE_pcrel | DW_EH_PE_indirect | DW_EH_PE_sdata4) : \
851 ((CODE) == 1 || (GLOBAL) == 0) ? DW_EH_PE_pcrel : DW_EH_PE_absptr)
853 #define ASM_OUTPUT_DWARF_DELTA(FILE,SIZE,LABEL1,LABEL2) \
854 darwin_asm_output_dwarf_delta (FILE, SIZE, LABEL1, LABEL2)
856 #define ASM_OUTPUT_DWARF_OFFSET(FILE,SIZE,LABEL,BASE) \
857 darwin_asm_output_dwarf_offset (FILE, SIZE, LABEL, BASE)
859 #define ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX(ASM_OUT_FILE, ENCODING, SIZE, ADDR, DONE) \
860 if (ENCODING == ASM_PREFERRED_EH_DATA_FORMAT (2, 1)) { \
861 darwin_non_lazy_pcrel (ASM_OUT_FILE, ADDR); \
865 /* Experimentally, putting jump tables in text is faster on SPEC.
866 Also this is needed for correctness for coalesced functions. */
868 #ifndef JUMP_TABLES_IN_TEXT_SECTION
869 #define JUMP_TABLES_IN_TEXT_SECTION 1
872 #define TARGET_TERMINATE_DW2_EH_FRAME_INFO false
874 #define TARGET_ASM_INIT_SECTIONS darwin_init_sections
875 #undef TARGET_ASM_NAMED_SECTION
876 #define TARGET_ASM_NAMED_SECTION darwin_asm_named_section
878 #define DARWIN_REGISTER_TARGET_PRAGMAS() \
880 if (!flag_preprocess_only) \
881 cpp_register_pragma (parse_in, NULL, "mark", \
882 darwin_pragma_ignore, false); \
883 c_register_pragma (0, "options", darwin_pragma_options); \
884 c_register_pragma (0, "segment", darwin_pragma_ignore); \
885 c_register_pragma (0, "unused", darwin_pragma_unused); \
886 c_register_pragma (0, "ms_struct", darwin_pragma_ms_struct); \
890 #define ASM_APP_ON ""
892 #define ASM_APP_OFF ""
894 void darwin_register_frameworks (const char *, const char *, int);
895 void darwin_register_objc_includes (const char *, const char *, int);
896 #define TARGET_EXTRA_PRE_INCLUDES darwin_register_objc_includes
897 #define TARGET_EXTRA_INCLUDES darwin_register_frameworks
899 void add_framework_path (char *);
900 #define TARGET_OPTF add_framework_path
902 #define TARGET_POSIX_IO
904 /* All new versions of Darwin have C99 functions. */
906 #define TARGET_C99_FUNCTIONS 1
908 #define WINT_TYPE "int"
910 /* Every program on darwin links against libSystem which contains the pthread
911 routines, so there's no need to explicitly call out when doing threaded
914 #undef GOMP_SELF_SPECS
915 #define GOMP_SELF_SPECS ""
917 /* Darwin disables section anchors by default.
918 They should be enabled per arch where support exists in that arch. */
919 #define TARGET_ASM_OUTPUT_ANCHOR NULL
920 #define DARWIN_SECTION_ANCHORS 0
922 /* Attempt to turn on execute permission for the stack. This may be
923 used by TARGET_TRAMPOLINE_INIT if the target needs it (that is,
924 if the target machine can change execute permissions on a page).
926 There is no way to query the execute permission of the stack, so
927 we always issue the mprotect() call.
929 Unfortunately it is not possible to make this namespace-clean.
931 Also note that no errors should be emitted by this code; it is
932 considered dangerous for library calls to send messages to
935 #define ENABLE_EXECUTE_STACK \
936 extern void __enable_execute_stack (void *); \
938 __enable_execute_stack (void *addr) \
940 extern int mprotect (void *, size_t, int); \
941 extern int getpagesize (void); \
949 size = getpagesize(); \
950 mask = ~((long) size - 1); \
953 page = (char *) (((long) addr) & mask); \
954 end = (char *) ((((long) (addr + (TARGET_64BIT ? 48 : 40))) & mask) + size); \
956 /* 7 == PROT_READ | PROT_WRITE | PROT_EXEC */ \
957 (void) mprotect (page, end - page, 7); \
960 /* For Apple KEXTs, we make the constructors return this to match gcc
962 #define TARGET_CXX_CDTOR_RETURNS_THIS (darwin_kextabi_p)
963 #define TARGET_KEXTABI flag_apple_kext
965 /* We have target-specific builtins. */
966 #define TARGET_FOLD_BUILTIN darwin_fold_builtin
968 #define TARGET_OBJC_CONSTRUCT_STRING_OBJECT \
969 darwin_objc_construct_string
971 #define TARGET_STRING_OBJECT_REF_TYPE_P \
972 darwin_cfstring_ref_p
974 #define TARGET_N_FORMAT_TYPES 1
975 #define TARGET_FORMAT_TYPES darwin_additional_format_types
977 #define TARGET_CHECK_STRING_OBJECT_FORMAT_ARG \
978 darwin_check_cfstring_format_arg
980 #define TARGET_HAS_TARGETCM 1
982 #ifndef USED_FOR_TARGET
983 extern void darwin_driver_init (unsigned int *,struct cl_decoded_option **);
984 #define GCC_DRIVER_HOST_INITIALIZATION \
985 darwin_driver_init (&decoded_options_count, &decoded_options)
988 /* The Apple assembler and linker do not support constructor priorities. */
989 #undef SUPPORTS_INIT_PRIORITY
990 #define SUPPORTS_INIT_PRIORITY 0
992 #endif /* CONFIG_DARWIN_H */