1 /* Target definitions for Darwin (Mac OS X) systems.
2 Copyright (C) 1989, 1990, 1991, 1992, 1993, 2000, 2001, 2002, 2003, 2004,
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 2, 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 You should have received a copy of the GNU General Public License
20 along with GCC; see the file COPYING. If not, write to
21 the Free Software Foundation, 51 Franklin Street, Fifth Floor,
22 Boston, MA 02110-1301, USA. */
24 #ifndef CONFIG_DARWIN_H
25 #define CONFIG_DARWIN_H
27 /* The definitions in this file are common to all processor types
28 running Darwin, which is the kernel for Mac OS X. Darwin is
29 basically a BSD user layer laid over a Mach kernel, then evolved
30 for many years (at NeXT) in parallel with other Unix systems. So
31 while the runtime is a somewhat idiosyncratic Mach-based thing,
32 other definitions look like they would for a BSD variant. */
34 /* Although NeXT ran on many different architectures, as of Jan 2001
35 the only supported Darwin targets are PowerPC and x86. */
37 /* One of Darwin's NeXT legacies is the Mach-O format, which is partly
38 like a.out and partly like COFF, with additional features like
39 multi-architecture binary support. */
41 #define OBJECT_FORMAT_MACHO
43 /* Don't assume anything about the header files. */
44 #define NO_IMPLICIT_EXTERN_C
46 /* Suppress g++ attempt to link in the math library automatically. */
47 #define MATH_LIBRARY ""
53 /* Define an empty body for the function do_global_dtors() in libgcc2.c. */
55 #define DO_GLOBAL_DTORS_BODY
57 /* The string value for __SIZE_TYPE__. */
60 #define SIZE_TYPE "long unsigned int"
63 /* Type used for ptrdiff_t, as a string used in a declaration. */
66 #define PTRDIFF_TYPE "int"
71 #define WCHAR_TYPE "int"
72 #undef WCHAR_TYPE_SIZE
73 #define WCHAR_TYPE_SIZE 32
75 /* Default to using the NeXT-style runtime, since that's what is
76 pre-installed on Darwin systems. */
78 #define NEXT_OBJC_RUNTIME
80 /* Don't default to pcc-struct-return, because gcc is the only compiler, and
81 we want to retain compatibility with older gcc versions. */
83 #undef DEFAULT_PCC_STRUCT_RETURN
84 #define DEFAULT_PCC_STRUCT_RETURN 0
86 /* True if pragma ms_struct is in effect. */
87 extern GTY(()) int darwin_ms_struct;
89 /* This table intercepts weirdo options whose names would interfere
90 with normal driver conventions, and either translates them into
91 standardly-named options, or adds a 'Z' so that they can get to
92 specs processing without interference.
94 Do not expand a linker option to "-Xlinker -<option>", since that
95 forfeits the ability to control via spec strings later. However,
96 as a special exception, do this translation with -filelist, because
97 otherwise the driver will think there are no input files and quit.
98 (The alternative would be to hack the driver to recognize -filelist
99 specially, but it's simpler to use the translation table.)
101 Note that an option name with a prefix that matches another option
102 name, that also takes an argument, needs to be modified so the
103 prefix is different, otherwise a '*' after the shorter option will
104 match with the longer one.
106 The SUBTARGET_OPTION_TRANSLATE_TABLE macro, which _must_ be defined
107 in gcc/config/{i386,rs6000}/darwin.h, should contain any additional
108 command-line option translations specific to the particular target
111 #define TARGET_OPTION_TRANSLATE_TABLE \
112 { "-all_load", "-Zall_load" }, \
113 { "-allowable_client", "-Zallowable_client" }, \
114 { "-arch_errors_fatal", "-Zarch_errors_fatal" }, \
115 { "-bind_at_load", "-Zbind_at_load" }, \
116 { "-bundle", "-Zbundle" }, \
117 { "-bundle_loader", "-Zbundle_loader" }, \
118 { "-weak_reference_mismatches", "-Zweak_reference_mismatches" }, \
119 { "-dead_strip", "-Zdead_strip" }, \
120 { "-no_dead_strip_inits_and_terms", "-Zno_dead_strip_inits_and_terms" }, \
121 { "-dependency-file", "-MF" }, \
122 { "-dylib_file", "-Zdylib_file" }, \
123 { "-dynamic", "-Zdynamic" }, \
124 { "-dynamiclib", "-Zdynamiclib" }, \
125 { "-exported_symbols_list", "-Zexported_symbols_list" }, \
126 { "-gfull", "-g -fno-eliminate-unused-debug-symbols" }, \
127 { "-gused", "-g -feliminate-unused-debug-symbols" }, \
128 { "-segaddr", "-Zsegaddr" }, \
129 { "-segs_read_only_addr", "-Zsegs_read_only_addr" }, \
130 { "-segs_read_write_addr", "-Zsegs_read_write_addr" }, \
131 { "-seg_addr_table", "-Zseg_addr_table" }, \
132 { "-seg_addr_table_filename", "-Zfn_seg_addr_table_filename" }, \
133 { "-umbrella", "-Zumbrella" }, \
134 { "-fapple-kext", "-fapple-kext -static -Wa,-static" }, \
135 { "-filelist", "-Xlinker -filelist -Xlinker" }, \
136 { "-findirect-virtual-calls", "-fapple-kext" }, \
137 { "-flat_namespace", "-Zflat_namespace" }, \
138 { "-force_cpusubtype_ALL", "-Zforce_cpusubtype_ALL" }, \
139 { "-force_flat_namespace", "-Zforce_flat_namespace" }, \
140 { "-framework", "-Xlinker -framework -Xlinker" }, \
141 { "-fterminated-vtables", "-fapple-kext" }, \
142 { "-image_base", "-Zimage_base" }, \
143 { "-init", "-Zinit" }, \
144 { "-install_name", "-Zinstall_name" }, \
145 { "-mkernel", "-mkernel -static -Wa,-static" }, \
146 { "-multiply_defined_unused", "-Zmultiplydefinedunused" }, \
147 { "-multiply_defined", "-Zmultiply_defined" }, \
148 { "-multi_module", "-Zmulti_module" }, \
149 { "-static", "-static -Wa,-static" }, \
150 { "-single_module", "-Zsingle_module" }, \
151 { "-unexported_symbols_list", "-Zunexported_symbols_list" }, \
152 SUBTARGET_OPTION_TRANSLATE_TABLE
154 #define SUBSUBTARGET_OVERRIDE_OPTIONS \
156 darwin_override_options (); \
159 /* These compiler options take n arguments. */
161 #undef WORD_SWITCH_TAKES_ARG
162 #define WORD_SWITCH_TAKES_ARG(STR) \
163 (DEFAULT_WORD_SWITCH_TAKES_ARG (STR) ? 1 : \
164 !strcmp (STR, "Zallowable_client") ? 1 : \
165 !strcmp (STR, "arch") ? 1 : \
166 !strcmp (STR, "arch_only") ? 1 : \
167 !strcmp (STR, "Zbundle_loader") ? 1 : \
168 !strcmp (STR, "client_name") ? 1 : \
169 !strcmp (STR, "compatibility_version") ? 1 : \
170 !strcmp (STR, "current_version") ? 1 : \
171 !strcmp (STR, "Zdylib_file") ? 1 : \
172 !strcmp (STR, "Zexported_symbols_list") ? 1 : \
173 !strcmp (STR, "Zimage_base") ? 1 : \
174 !strcmp (STR, "Zinit") ? 1 : \
175 !strcmp (STR, "Zinstall_name") ? 1 : \
176 !strcmp (STR, "Zmultiplydefinedunused") ? 1 : \
177 !strcmp (STR, "Zmultiply_defined") ? 1 : \
178 !strcmp (STR, "precomp-trustfile") ? 1 : \
179 !strcmp (STR, "read_only_relocs") ? 1 : \
180 !strcmp (STR, "sectcreate") ? 3 : \
181 !strcmp (STR, "sectorder") ? 3 : \
182 !strcmp (STR, "Zsegaddr") ? 2 : \
183 !strcmp (STR, "Zsegs_read_only_addr") ? 1 : \
184 !strcmp (STR, "Zsegs_read_write_addr") ? 1 : \
185 !strcmp (STR, "Zseg_addr_table") ? 1 : \
186 !strcmp (STR, "Zfn_seg_addr_table_filename") ? 1 :\
187 !strcmp (STR, "seg1addr") ? 1 : \
188 !strcmp (STR, "segprot") ? 3 : \
189 !strcmp (STR, "sub_library") ? 1 : \
190 !strcmp (STR, "sub_umbrella") ? 1 : \
191 !strcmp (STR, "Zumbrella") ? 1 : \
192 !strcmp (STR, "undefined") ? 1 : \
193 !strcmp (STR, "Zunexported_symbols_list") ? 1 : \
194 !strcmp (STR, "Zweak_reference_mismatches") ? 1 : \
195 !strcmp (STR, "pagezero_size") ? 1 : \
196 !strcmp (STR, "segs_read_only_addr") ? 1 : \
197 !strcmp (STR, "segs_read_write_addr") ? 1 : \
198 !strcmp (STR, "sectalign") ? 3 : \
199 !strcmp (STR, "sectobjectsymbols") ? 2 : \
200 !strcmp (STR, "segcreate") ? 3 : \
201 !strcmp (STR, "dylinker_install_name") ? 1 : \
204 #define SUBTARGET_C_COMMON_OVERRIDE_OPTIONS do { \
205 if (flag_mkernel || flag_apple_kext) \
207 if (flag_use_cxa_atexit == 2) \
208 flag_use_cxa_atexit = 0; \
209 /* kexts should always be built without the coalesced sections \
210 because the kernel loader doesn't grok such sections. */ \
212 /* No RTTI in kexts. */ \
217 /* Machine dependent cpp options. Don't add more options here, add
218 them to darwin_cpp_builtins in darwin-c.c. */
221 #define CPP_SPEC "%{static:%{!dynamic:-D__STATIC__}}%{!static:-D__DYNAMIC__}" \
222 " %{pthread:-D_REENTRANT}"
224 /* This is mostly a clone of the standard LINK_COMMAND_SPEC, plus
225 precomp, libtool, and fat build additions. Also we
226 don't specify a second %G after %L because libSystem is
227 self-contained and doesn't need to link against libgcc.a. */
228 /* In general, random Darwin linker flags should go into LINK_SPEC
229 instead of LINK_COMMAND_SPEC. The command spec is better for
230 specifying the handling of options understood by generic Unix
231 linkers, and for positional arguments like libraries. */
232 #define LINK_COMMAND_SPEC "\
233 %{!fdump=*:%{!fsyntax-only:%{!c:%{!M:%{!MM:%{!E:%{!S:\
234 %(linker) %l %X %{d} %{s} %{t} %{Z} %{u*} \
235 %{A} %{e*} %{m} %{r} %{x} \
236 %{o*}%{!o:-o a.out} \
237 %{!A:%{!nostdlib:%{!nostartfiles:%S}}} \
238 %{L*} %{fopenmp:%:include(libgomp.spec)%(link_gomp)} \
239 %(link_libgcc) %o %{fprofile-arcs|fprofile-generate|coverage:-lgcov} \
240 %{!nostdlib:%{!nodefaultlibs:%(link_ssp) %G %L}} \
241 %{!A:%{!nostdlib:%{!nostartfiles:%E}}} %{T*} %{F*} }}}}}}}\n\
242 %{!fdump=*:%{!fsyntax-only:%{!c:%{!M:%{!MM:%{!E:%{!S:\
243 %{.c|.cc|.C|.cpp|.c++|.CPP|.m|.mm: \
244 %{gdwarf-2:%{!gstabs*:%{!g0: dsymutil %{o*:%*}%{!o:a.out}}}}}}}}}}}}"
246 #ifdef TARGET_SYSTEM_ROOT
247 #define LINK_SYSROOT_SPEC \
248 "%{isysroot*:-syslibroot %*;:-syslibroot " TARGET_SYSTEM_ROOT "}"
250 #define LINK_SYSROOT_SPEC "%{isysroot*:-syslibroot %*}"
253 /* Please keep the random linker options in alphabetical order (modulo
254 'Z' and 'no' prefixes). Note that options taking arguments may appear
255 multiple times on a command line with different arguments each time,
256 so put a * after their names so all of them get passed. */
258 "%{static}%{!static:-dynamic} \
259 %{fgnu-runtime:%:replace-outfile(-lobjc -lobjc-gnu)}\
261 %{Zforce_cpusubtype_ALL:-arch %(darwin_arch) -force_cpusubtype_ALL} \
262 %{!Zforce_cpusubtype_ALL:-arch %(darwin_subarch)} \
264 %{Zbundle_loader*:-bundle_loader %*} \
266 %{compatibility_version*:%e-compatibility_version only allowed with -dynamiclib\
268 %{current_version*:%e-current_version only allowed with -dynamiclib} \
269 %{Zforce_flat_namespace:-force_flat_namespace} \
270 %{Zinstall_name*:%e-install_name only allowed with -dynamiclib} \
271 %{keep_private_externs} \
274 %{Zdynamiclib: -dylib \
275 %{Zbundle:%e-bundle not allowed with -dynamiclib} \
276 %{Zbundle_loader*:%e-bundle_loader not allowed with -dynamiclib} \
277 %{client_name*:%e-client_name not allowed with -dynamiclib} \
278 %{compatibility_version*:-dylib_compatibility_version %*} \
279 %{current_version*:-dylib_current_version %*} \
280 %{Zforce_cpusubtype_ALL:-arch %(darwin_arch)} \
281 %{!Zforce_cpusubtype_ALL: -arch %(darwin_subarch)} \
282 %{Zforce_flat_namespace:%e-force_flat_namespace not allowed with -dynamiclib} \
283 %{Zinstall_name*:-dylib_install_name %*} \
284 %{keep_private_externs:%e-keep_private_externs not allowed with -dynamiclib} \
285 %{private_bundle:%e-private_bundle not allowed with -dynamiclib} \
287 %{Zall_load:-all_load} \
288 %{Zallowable_client*:-allowable_client %*} \
289 %{Zbind_at_load:-bind_at_load} \
290 %{Zarch_errors_fatal:-arch_errors_fatal} \
291 %{Zdead_strip:-dead_strip} \
292 %{Zno_dead_strip_inits_and_terms:-no_dead_strip_inits_and_terms} \
293 %{Zdylib_file*:-dylib_file %*} \
294 %{Zdynamic:-dynamic}\
295 %{Zexported_symbols_list*:-exported_symbols_list %*} \
296 %{Zflat_namespace:-flat_namespace} \
297 %{headerpad_max_install_names*} \
298 %{Zimage_base*:-image_base %*} \
300 %{!mmacosx-version-min=*:-macosx_version_min %(darwin_minversion)} \
301 %{mmacosx-version-min=*:-macosx_version_min %*} \
303 %{Zmulti_module:-multi_module} %{Zsingle_module:-single_module} \
304 %{Zmultiply_defined*:-multiply_defined %*} \
305 %{!Zmultiply_defined*:%{shared-libgcc: \
306 %:version-compare(< 10.5 mmacosx-version-min= -multiply_defined) \
307 %:version-compare(< 10.5 mmacosx-version-min= suppress)}} \
308 %{Zmultiplydefinedunused*:-multiply_defined_unused %*} \
309 %{prebind} %{noprebind} %{nofixprebinding} %{prebind_all_twolevel_modules} \
310 %{read_only_relocs} \
311 %{sectcreate*} %{sectorder*} %{seg1addr*} %{segprot*} \
312 %{Zsegaddr*:-segaddr %*} \
313 %{Zsegs_read_only_addr*:-segs_read_only_addr %*} \
314 %{Zsegs_read_write_addr*:-segs_read_write_addr %*} \
315 %{Zseg_addr_table*: -seg_addr_table %*} \
316 %{Zfn_seg_addr_table_filename*:-seg_addr_table_filename %*} \
317 %{sub_library*} %{sub_umbrella*} \
318 " LINK_SYSROOT_SPEC " \
319 %{twolevel_namespace} %{twolevel_namespace_hints} \
320 %{Zumbrella*: -umbrella %*} \
322 %{Zunexported_symbols_list*:-unexported_symbols_list %*} \
323 %{Zweak_reference_mismatches*:-weak_reference_mismatches %*} \
324 %{!Zweak_reference_mismatches*:-weak_reference_mismatches non-weak} \
328 %{pagezero_size*} %{segs_read_*} %{seglinkedit} %{noseglinkedit} \
329 %{sectalign*} %{sectobjectsymbols*} %{segcreate*} %{whyload} \
330 %{whatsloaded} %{dylinker_install_name*} \
331 %{dylinker} %{Mach} "
334 /* Machine dependent libraries. */
336 #define LIB_SPEC "%{!static:-lSystem}"
338 /* Support -mmacosx-version-min by supplying different (stub) libgcc_s.dylib
339 libraries to link against, and by not linking against libgcc_s on
342 Note that by default, -lgcc_eh is not linked against! This is
343 because in a future version of Darwin the EH frame information may
344 be in a new format, or the fallback routine might be changed; if
345 you want to explicitly link against the static version of those
346 routines, because you know you don't need to unwind through system
347 libraries, you need to explicitly say -static-libgcc.
349 If it is linked against, it has to be before -lgcc, because it may
350 need symbols from -lgcc. */
351 #undef REAL_LIBGCC_SPEC
352 #define REAL_LIBGCC_SPEC \
353 "%{static-libgcc|static: -lgcc_eh -lgcc; \
354 shared-libgcc|fexceptions|fgnu-runtime: \
355 %:version-compare(!> 10.5 mmacosx-version-min= -lgcc_s.10.4) \
356 %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_s.10.5) \
358 :%:version-compare(>< 10.3.9 10.5 mmacosx-version-min= -lgcc_s.10.4) \
359 %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_s.10.5) \
362 /* We specify crt0.o as -lcrt0.o so that ld will search the library path.
364 crt3.o provides __cxa_atexit on systems that don't have it. Since
365 it's only used with C++, which requires passing -shared-libgcc, key
366 off that to avoid unnecessarily adding a destructor to every
367 powerpc program built. */
369 #undef STARTFILE_SPEC
370 #define STARTFILE_SPEC \
371 "%{Zdynamiclib: %(darwin_dylib1) } \
372 %{!Zdynamiclib:%{Zbundle:%{!static:-lbundle1.o}} \
373 %{!Zbundle:%{pg:%{static:-lgcrt0.o} \
374 %{!static:%{object:-lgcrt0.o} \
375 %{!object:%{preload:-lgcrt0.o} \
376 %{!preload:-lgcrt1.o %(darwin_crt2)}}}} \
377 %{!pg:%{static:-lcrt0.o} \
378 %{!static:%{object:-lcrt0.o} \
379 %{!object:%{preload:-lcrt0.o} \
380 %{!preload: %(darwin_crt1) \
381 %(darwin_crt2)}}}}}} \
382 %{shared-libgcc:%:version-compare(< 10.5 mmacosx-version-min= crt3.o%s)}"
384 /* The native Darwin linker doesn't necessarily place files in the order
385 that they're specified on the link line. Thus, it is pointless
386 to put anything in ENDFILE_SPEC. */
387 /* #define ENDFILE_SPEC "" */
389 #define DARWIN_EXTRA_SPECS \
390 { "darwin_crt1", DARWIN_CRT1_SPEC }, \
391 { "darwin_dylib1", DARWIN_DYLIB1_SPEC }, \
392 { "darwin_minversion", DARWIN_MINVERSION_SPEC },
394 #define DARWIN_DYLIB1_SPEC \
395 "%:version-compare(!> 10.5 mmacosx-version-min= -ldylib1.o) \
396 %:version-compare(>= 10.5 mmacosx-version-min= -ldylib1.10.5.o)"
398 #define DARWIN_CRT1_SPEC \
399 "%:version-compare(!> 10.5 mmacosx-version-min= -lcrt1.o) \
400 %:version-compare(>= 10.5 mmacosx-version-min= -lcrt1.10.5.o)"
402 /* Default Darwin ASM_SPEC, very simple. */
403 #define ASM_SPEC "-arch %(darwin_arch) \
404 %{Zforce_cpusubtype_ALL:-force_cpusubtype_ALL}"
406 /* We still allow output of STABS. */
408 #define DBX_DEBUGGING_INFO 1
410 #define DWARF2_DEBUGGING_INFO
411 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
413 #define DEBUG_FRAME_SECTION "__DWARF,__debug_frame,regular,debug"
414 #define DEBUG_INFO_SECTION "__DWARF,__debug_info,regular,debug"
415 #define DEBUG_ABBREV_SECTION "__DWARF,__debug_abbrev,regular,debug"
416 #define DEBUG_ARANGES_SECTION "__DWARF,__debug_aranges,regular,debug"
417 #define DEBUG_MACINFO_SECTION "__DWARF,__debug_macinfo,regular,debug"
418 #define DEBUG_LINE_SECTION "__DWARF,__debug_line,regular,debug"
419 #define DEBUG_LOC_SECTION "__DWARF,__debug_loc,regular,debug"
420 #define DEBUG_PUBNAMES_SECTION "__DWARF,__debug_pubnames,regular,debug"
421 #define DEBUG_PUBTYPES_SECTION "__DWARF,__debug_pubtypes,regular,debug"
422 #define DEBUG_STR_SECTION "__DWARF,__debug_str,regular,debug"
423 #define DEBUG_RANGES_SECTION "__DWARF,__debug_ranges,regular,debug"
425 /* When generating stabs debugging, use N_BINCL entries. */
427 #define DBX_USE_BINCL
429 /* There is no limit to the length of stabs strings. */
431 #define DBX_CONTIN_LENGTH 0
433 /* gdb needs a null N_SO at the end of each file for scattered loading. */
435 #define DBX_OUTPUT_NULL_N_SO_AT_MAIN_SOURCE_FILE_END
437 /* GCC's definition of 'one_only' is the same as its definition of 'weak'. */
438 #define MAKE_DECL_ONE_ONLY(DECL) (DECL_WEAK (DECL) = 1)
440 /* Mach-O supports 'weak imports', and 'weak definitions' in coalesced
441 sections. machopic_select_section ensures that weak variables go in
442 coalesced sections. Weak aliases (or any other kind of aliases) are
443 not supported. Weak symbols that aren't visible outside the .s file
444 are not supported. */
445 #define ASM_WEAKEN_DECL(FILE, DECL, NAME, ALIAS) \
449 warning (0, "alias definitions not supported in Mach-O; ignored"); \
453 if (! DECL_EXTERNAL (DECL) && TREE_PUBLIC (DECL)) \
454 targetm.asm_out.globalize_label (FILE, NAME); \
455 if (DECL_EXTERNAL (DECL)) \
456 fputs ("\t.weak_reference ", FILE); \
457 else if (! lookup_attribute ("weak", DECL_ATTRIBUTES (DECL)) \
458 && lookup_attribute ("weak_import", DECL_ATTRIBUTES (DECL))) \
460 else if (TREE_PUBLIC (DECL)) \
461 fputs ("\t.weak_definition ", FILE); \
464 assemble_name (FILE, NAME); \
465 fputc ('\n', FILE); \
468 /* Darwin has the pthread routines in libSystem, which every program
469 links to, so there's no need for weak-ness for that. */
470 #define GTHREAD_USE_WEAK 0
472 /* The Darwin linker imposes two limitations on common symbols: they
473 can't have hidden visibility, and they can't appear in dylibs. As
474 a consequence, we should never use common symbols to represent
476 #undef USE_COMMON_FOR_ONE_ONLY
477 #define USE_COMMON_FOR_ONE_ONLY 0
479 /* The Darwin linker doesn't want coalesced symbols to appear in
480 a static archive's table of contents. */
481 #undef TARGET_WEAK_NOT_IN_ARCHIVE_TOC
482 #define TARGET_WEAK_NOT_IN_ARCHIVE_TOC 1
484 /* On Darwin, we don't (at the time of writing) have linkonce sections
485 with names, so it's safe to make the class data not comdat. */
486 #define TARGET_CXX_CLASS_DATA_ALWAYS_COMDAT hook_bool_void_false
488 /* For efficiency, on Darwin the RTTI information that is always
489 emitted in the standard C++ library should not be COMDAT. */
490 #define TARGET_CXX_LIBRARY_RTTI_COMDAT hook_bool_void_false
492 /* We make exception information linkonce. */
493 #undef TARGET_USES_WEAK_UNWIND_INFO
494 #define TARGET_USES_WEAK_UNWIND_INFO 1
496 /* We need to use a nonlocal label for the start of an EH frame: the
497 Darwin linker requires that a coalesced section start with a label.
498 Unfortunately, it also requires that 'debug' sections don't contain
500 #undef FRAME_BEGIN_LABEL
501 #define FRAME_BEGIN_LABEL (for_eh ? "EH_frame" : "Lframe")
503 /* Emit a label for the FDE corresponding to DECL. EMPTY means
504 emit a label for an empty FDE. */
505 #define TARGET_ASM_EMIT_UNWIND_LABEL darwin_emit_unwind_label
507 /* Emit a label to separate the exception table. */
508 #define TARGET_ASM_EMIT_EXCEPT_TABLE_LABEL darwin_emit_except_table_label
510 /* Our profiling scheme doesn't LP labels and counter words. */
512 #define NO_PROFILE_COUNTERS 1
514 #undef INIT_SECTION_ASM_OP
515 #define INIT_SECTION_ASM_OP
519 #define TARGET_ASM_CONSTRUCTOR machopic_asm_out_constructor
520 #define TARGET_ASM_DESTRUCTOR machopic_asm_out_destructor
522 /* Always prefix with an underscore. */
524 #define USER_LABEL_PREFIX "_"
526 /* Don't output a .file directive. That is only used by the assembler for
528 #undef TARGET_ASM_FILE_START_FILE_DIRECTIVE
529 #define TARGET_ASM_FILE_START_FILE_DIRECTIVE false
531 #undef TARGET_ASM_FILE_END
532 #define TARGET_ASM_FILE_END darwin_file_end
534 #define ASM_OUTPUT_SKIP(FILE,SIZE) \
535 fprintf (FILE, "\t.space "HOST_WIDE_INT_PRINT_UNSIGNED"\n", SIZE)
537 /* Give ObjC methods pretty symbol names. */
539 #undef OBJC_GEN_METHOD_LABEL
540 #define OBJC_GEN_METHOD_LABEL(BUF,IS_INST,CLASS_NAME,CAT_NAME,SEL_NAME,NUM) \
542 sprintf (BUF, "%c[%s(%s) %s]", (IS_INST) ? '-' : '+', \
543 (CLASS_NAME), (CAT_NAME), (SEL_NAME)); \
545 sprintf (BUF, "%c[%s %s]", (IS_INST) ? '-' : '+', \
546 (CLASS_NAME), (SEL_NAME)); \
549 /* The RTTI data (e.g., __ti4name) is common and public (and static),
550 but it does need to be referenced via indirect PIC data pointers.
551 The machopic_define_symbol calls are telling the machopic subsystem
552 that the name *is* defined in this module, so it doesn't need to
553 make them indirect. */
555 #undef ASM_DECLARE_OBJECT_NAME
556 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL) \
558 const char *xname = NAME; \
559 if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF) \
560 xname = IDENTIFIER_POINTER (DECL_NAME (DECL)); \
561 if (! DECL_WEAK (DECL) \
562 && ((TREE_STATIC (DECL) \
563 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
564 || DECL_INITIAL (DECL))) \
565 machopic_define_symbol (DECL_RTL (DECL)); \
566 if ((TREE_STATIC (DECL) \
567 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
568 || DECL_INITIAL (DECL)) \
569 (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false); \
570 ASM_OUTPUT_LABEL (FILE, xname); \
571 /* Darwin doesn't support zero-size objects, so give them a \
573 if (tree_low_cst (DECL_SIZE_UNIT (DECL), 1) == 0) \
574 assemble_zeros (1); \
577 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
579 const char *xname = NAME; \
580 if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF) \
581 xname = IDENTIFIER_POINTER (DECL_NAME (DECL)); \
582 if (! DECL_WEAK (DECL) \
583 && ((TREE_STATIC (DECL) \
584 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
585 || DECL_INITIAL (DECL))) \
586 machopic_define_symbol (DECL_RTL (DECL)); \
587 if ((TREE_STATIC (DECL) \
588 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
589 || DECL_INITIAL (DECL)) \
590 (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false); \
591 ASM_OUTPUT_LABEL (FILE, xname); \
594 #define ASM_DECLARE_CONSTANT_NAME(FILE, NAME, EXP, SIZE) \
596 ASM_OUTPUT_LABEL (FILE, NAME); \
597 /* Darwin doesn't support zero-size objects, so give them a \
600 assemble_zeros (1); \
603 /* Wrap new method names in quotes so the assembler doesn't gag.
604 Make Objective-C internal symbols local. */
606 #undef ASM_OUTPUT_LABELREF
607 #define ASM_OUTPUT_LABELREF(FILE,NAME) \
609 const char *xname = (NAME); \
610 if (! strcmp (xname, "<pic base>")) \
611 machopic_output_function_base_name(FILE); \
612 else if (xname[0] == '&' || xname[0] == '*') \
614 int len = strlen (xname); \
615 if (len > 6 && !strcmp ("$stub", xname + len - 5)) \
616 machopic_validate_stub_or_non_lazy_ptr (xname); \
617 else if (len > 7 && !strcmp ("$stub\"", xname + len - 6)) \
618 machopic_validate_stub_or_non_lazy_ptr (xname); \
619 else if (len > 14 && !strcmp ("$non_lazy_ptr", xname + len - 13)) \
620 machopic_validate_stub_or_non_lazy_ptr (xname); \
621 else if (len > 15 && !strcmp ("$non_lazy_ptr\"", xname + len - 14)) \
622 machopic_validate_stub_or_non_lazy_ptr (xname); \
623 if (xname[1] != '"' && name_needs_quotes (&xname[1])) \
624 fprintf (FILE, "\"%s\"", &xname[1]); \
626 fputs (&xname[1], FILE); \
628 else if (xname[0] == '+' || xname[0] == '-') \
629 fprintf (FILE, "\"%s\"", xname); \
630 else if (!strncmp (xname, "_OBJC_", 6)) \
631 fprintf (FILE, "L%s", xname); \
632 else if (!strncmp (xname, ".objc_class_name_", 17)) \
633 fprintf (FILE, "%s", xname); \
634 else if (xname[0] != '"' && name_needs_quotes (xname)) \
635 fprintf (FILE, "\"%s\"", xname); \
637 asm_fprintf (FILE, "%U%s", xname); \
640 /* Output before executable code. */
641 #undef TEXT_SECTION_ASM_OP
642 #define TEXT_SECTION_ASM_OP "\t.text"
644 /* Output before writable data. */
646 #undef DATA_SECTION_ASM_OP
647 #define DATA_SECTION_ASM_OP "\t.data"
650 #define ALIGN_ASM_OP ".align"
652 #undef ASM_OUTPUT_ALIGN
653 #define ASM_OUTPUT_ALIGN(FILE,LOG) \
655 fprintf (FILE, "\t%s %d\n", ALIGN_ASM_OP, (LOG))
657 /* Ensure correct alignment of bss data. */
659 #undef ASM_OUTPUT_ALIGNED_DECL_LOCAL
660 #define ASM_OUTPUT_ALIGNED_DECL_LOCAL(FILE, DECL, NAME, SIZE, ALIGN) \
662 unsigned HOST_WIDE_INT _new_size = SIZE; \
663 fputs (".lcomm ", (FILE)); \
664 assemble_name ((FILE), (NAME)); \
665 if (_new_size == 0) _new_size = 1; \
666 fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED",%u\n", _new_size, \
667 floor_log2 ((ALIGN) / BITS_PER_UNIT)); \
668 if ((DECL) && ((TREE_STATIC (DECL) \
669 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
670 || DECL_INITIAL (DECL))) \
672 (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false); \
673 machopic_define_symbol (DECL_RTL (DECL)); \
677 /* The maximum alignment which the object file format can support.
678 For Mach-O, this is 2^15. */
680 #undef MAX_OFILE_ALIGNMENT
681 #define MAX_OFILE_ALIGNMENT 0x8000
683 /* Declare the section variables. */
684 #ifndef USED_FOR_TARGET
685 enum darwin_section_enum {
686 #define DEF_SECTION(NAME, FLAGS, DIRECTIVE, OBJC) NAME,
687 #include "darwin-sections.def"
691 extern GTY(()) section * darwin_sections[NUM_DARWIN_SECTIONS];
694 #undef TARGET_ASM_SELECT_SECTION
695 #define TARGET_ASM_SELECT_SECTION machopic_select_section
696 #define USE_SELECT_SECTION_FOR_FUNCTIONS
698 #undef TARGET_ASM_SELECT_RTX_SECTION
699 #define TARGET_ASM_SELECT_RTX_SECTION machopic_select_rtx_section
700 #undef TARGET_ASM_UNIQUE_SECTION
701 #define TARGET_ASM_UNIQUE_SECTION darwin_unique_section
702 #undef TARGET_ASM_FUNCTION_RODATA_SECTION
703 #define TARGET_ASM_FUNCTION_RODATA_SECTION default_no_function_rodata_section
704 #undef TARGET_ASM_RELOC_RW_MASK
705 #define TARGET_ASM_RELOC_RW_MASK machopic_reloc_rw_mask
708 #define ASM_DECLARE_UNRESOLVED_REFERENCE(FILE,NAME) \
711 if (MACHOPIC_INDIRECT) \
712 fprintf (FILE, "\t.lazy_reference "); \
714 fprintf (FILE, "\t.reference "); \
715 assemble_name (FILE, NAME); \
716 fprintf (FILE, "\n"); \
720 #define ASM_DECLARE_CLASS_REFERENCE(FILE,NAME) \
723 fprintf (FILE, "\t"); \
724 assemble_name (FILE, NAME); \
725 fprintf (FILE, "=0\n"); \
726 (*targetm.asm_out.globalize_label) (FILE, NAME); \
730 /* Globalizing directive for a label. */
731 #define GLOBAL_ASM_OP ".globl "
732 #define TARGET_ASM_GLOBALIZE_LABEL darwin_globalize_label
734 /* Emit an assembler directive to set visibility for a symbol. Used
735 to support visibility attribute and Darwin's private extern
737 #undef TARGET_ASM_ASSEMBLE_VISIBILITY
738 #define TARGET_ASM_ASSEMBLE_VISIBILITY darwin_assemble_visibility
740 /* Extra attributes for Darwin. */
741 #define SUBTARGET_ATTRIBUTE_TABLE \
742 /* { name, min_len, max_len, decl_req, type_req, fn_type_req, handler } */ \
743 { "apple_kext_compatibility", 0, 0, false, true, false, \
744 darwin_handle_kext_attribute }, \
745 { "weak_import", 0, 0, true, false, false, \
746 darwin_handle_weak_import_attribute }
748 #undef ASM_GENERATE_INTERNAL_LABEL
749 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM) \
750 sprintf (LABEL, "*%s%ld", PREFIX, (long)(NUM))
752 #undef TARGET_ASM_MARK_DECL_PRESERVED
753 #define TARGET_ASM_MARK_DECL_PRESERVED darwin_mark_decl_preserved
755 /* Set on a symbol with SYMBOL_FLAG_FUNCTION or
756 MACHO_SYMBOL_FLAG_VARIABLE to indicate that the function or
757 variable has been defined in this translation unit.
758 When porting Mach-O to new architectures you need to make
759 sure these aren't clobbered by the backend. */
761 #define MACHO_SYMBOL_FLAG_VARIABLE (SYMBOL_FLAG_MACH_DEP)
762 #define MACHO_SYMBOL_FLAG_DEFINED ((SYMBOL_FLAG_MACH_DEP) << 1)
764 /* Set on a symbol to indicate when fix-and-continue style code
765 generation is being used and the symbol refers to a static symbol
766 that should be rebound from new instances of a translation unit to
767 the original instance of the data. */
769 #define MACHO_SYMBOL_STATIC ((SYMBOL_FLAG_MACH_DEP) << 2)
771 /* Symbolic names for various things we might know about a symbol. */
773 enum machopic_addr_class {
775 MACHOPIC_DEFINED_DATA,
776 MACHOPIC_UNDEFINED_DATA,
777 MACHOPIC_DEFINED_FUNCTION,
778 MACHOPIC_UNDEFINED_FUNCTION
781 /* Macros defining the various PIC cases. */
783 #define MACHO_DYNAMIC_NO_PIC_P (TARGET_DYNAMIC_NO_PIC)
784 #define MACHOPIC_INDIRECT (flag_pic || MACHO_DYNAMIC_NO_PIC_P)
785 #define MACHOPIC_JUST_INDIRECT (MACHO_DYNAMIC_NO_PIC_P)
786 #define MACHOPIC_PURE (flag_pic && ! MACHO_DYNAMIC_NO_PIC_P)
788 #undef TARGET_ENCODE_SECTION_INFO
789 #define TARGET_ENCODE_SECTION_INFO darwin_encode_section_info
790 #undef TARGET_STRIP_NAME_ENCODING
791 #define TARGET_STRIP_NAME_ENCODING default_strip_name_encoding
793 #define GEN_BINDER_NAME_FOR_STUB(BUF,STUB,STUB_LENGTH) \
795 const char *const stub_ = (STUB); \
796 char *buffer_ = (BUF); \
797 strcpy (buffer_, stub_); \
798 if (stub_[0] == '"') \
800 strcpy (buffer_ + (STUB_LENGTH) - 1, "_binder\""); \
804 strcpy (buffer_ + (STUB_LENGTH), "_binder"); \
808 #define GEN_SYMBOL_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH) \
810 const char *const symbol_ = (SYMBOL); \
811 char *buffer_ = (BUF); \
812 if (name_needs_quotes (symbol_) && symbol_[0] != '"') \
814 sprintf (buffer_, "\"%s\"", symbol_); \
818 strcpy (buffer_, symbol_); \
822 /* Given a symbol name string, create the lazy pointer version
823 of the symbol name. */
825 #define GEN_LAZY_PTR_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH) \
827 const char *symbol_ = (SYMBOL); \
828 char *buffer_ = (BUF); \
829 if (symbol_[0] == '"') \
831 strcpy (buffer_, "\"L"); \
832 strcpy (buffer_ + 2, symbol_ + 1); \
833 strcpy (buffer_ + (SYMBOL_LENGTH), "$lazy_ptr\""); \
835 else if (name_needs_quotes (symbol_)) \
837 strcpy (buffer_, "\"L"); \
838 strcpy (buffer_ + 2, symbol_); \
839 strcpy (buffer_ + (SYMBOL_LENGTH) + 2, "$lazy_ptr\""); \
843 strcpy (buffer_, "L"); \
844 strcpy (buffer_ + 1, symbol_); \
845 strcpy (buffer_ + (SYMBOL_LENGTH) + 1, "$lazy_ptr"); \
849 #define EH_FRAME_SECTION_NAME "__TEXT"
850 #define EH_FRAME_SECTION_ATTR ",coalesced,no_toc+strip_static_syms+live_support"
852 /* Java runtime class list. */
853 #define JCR_SECTION_NAME "__DATA,jcr,regular,no_dead_strip"
855 #undef ASM_PREFERRED_EH_DATA_FORMAT
856 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL) \
857 (((CODE) == 2 && (GLOBAL) == 1) \
858 ? (DW_EH_PE_pcrel | DW_EH_PE_indirect | DW_EH_PE_sdata4) : \
859 ((CODE) == 1 || (GLOBAL) == 0) ? DW_EH_PE_pcrel : DW_EH_PE_absptr)
861 #define ASM_OUTPUT_DWARF_DELTA(FILE,SIZE,LABEL1,LABEL2) \
862 darwin_asm_output_dwarf_delta (FILE, SIZE, LABEL1, LABEL2)
864 #define ASM_OUTPUT_DWARF_OFFSET(FILE,SIZE,LABEL,BASE) \
865 darwin_asm_output_dwarf_offset (FILE, SIZE, LABEL, BASE)
867 #define ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX(ASM_OUT_FILE, ENCODING, SIZE, ADDR, DONE) \
868 if (ENCODING == ASM_PREFERRED_EH_DATA_FORMAT (2, 1)) { \
869 darwin_non_lazy_pcrel (ASM_OUT_FILE, ADDR); \
873 /* Experimentally, putting jump tables in text is faster on SPEC.
874 Also this is needed for correctness for coalesced functions. */
876 #ifndef JUMP_TABLES_IN_TEXT_SECTION
877 #define JUMP_TABLES_IN_TEXT_SECTION 1
880 #define TARGET_TERMINATE_DW2_EH_FRAME_INFO false
882 #define TARGET_ASM_INIT_SECTIONS darwin_init_sections
883 #undef TARGET_ASM_NAMED_SECTION
884 #define TARGET_ASM_NAMED_SECTION darwin_asm_named_section
886 /* Handle pragma weak and pragma pack. */
887 #define HANDLE_SYSV_PRAGMA 1
889 #define HANDLE_PRAGMA_PACK_PUSH_POP 1
891 #define DARWIN_REGISTER_TARGET_PRAGMAS() \
893 c_register_pragma (0, "mark", darwin_pragma_ignore); \
894 c_register_pragma (0, "options", darwin_pragma_options); \
895 c_register_pragma (0, "segment", darwin_pragma_ignore); \
896 c_register_pragma (0, "unused", darwin_pragma_unused); \
897 c_register_pragma (0, "ms_struct", darwin_pragma_ms_struct); \
901 #define ASM_APP_ON ""
903 #define ASM_APP_OFF ""
905 void darwin_register_frameworks (const char *, const char *, int);
906 void darwin_register_objc_includes (const char *, const char *, int);
907 #define TARGET_EXTRA_PRE_INCLUDES darwin_register_objc_includes
908 #define TARGET_EXTRA_INCLUDES darwin_register_frameworks
910 void add_framework_path (char *);
911 #define TARGET_OPTF add_framework_path
913 #define TARGET_POSIX_IO
915 /* All new versions of Darwin have C99 functions. */
917 #define TARGET_C99_FUNCTIONS 1
919 #define WINT_TYPE "int"
921 /* Every program on darwin links against libSystem which contains the pthread
922 routines, so there's no need to explicitly call out when doing threaded
925 #undef GOMP_SELF_SPECS
926 #define GOMP_SELF_SPECS ""
928 /* Darwin can't support anchors until we can cope with the adjustments
929 to size that ASM_DECLARE_OBJECT_NAME and ASM_DECLARE_CONSTANT_NAME
930 when outputting members of an anchor block and the linker can be
931 taught to keep them together or we find some other suitable
932 code-gen technique. */
935 #define TARGET_ASM_OUTPUT_ANCHOR darwin_asm_output_anchor
937 #define TARGET_ASM_OUTPUT_ANCHOR NULL
940 /* Attempt to turn on execute permission for the stack. This may be
941 used by INITIALIZE_TRAMPOLINE of the target needs it (that is,
942 if the target machine can change execute permissions on a page).
944 There is no way to query the execute permission of the stack, so
945 we always issue the mprotect() call.
947 Unfortunately it is not possible to make this namespace-clean.
949 Also note that no errors should be emitted by this code; it is
950 considered dangerous for library calls to send messages to
953 #define ENABLE_EXECUTE_STACK \
954 extern void __enable_execute_stack (void *); \
956 __enable_execute_stack (void *addr) \
958 extern int mprotect (void *, size_t, int); \
959 extern int getpagesize (void); \
967 size = getpagesize(); \
968 mask = ~((long) size - 1); \
971 page = (char *) (((long) addr) & mask); \
972 end = (char *) ((((long) (addr + (TARGET_64BIT ? 48 : 40))) & mask) + size); \
974 /* 7 == PROT_READ | PROT_WRITE | PROT_EXEC */ \
975 (void) mprotect (page, end - page, 7); \
978 /* For Apple KEXTs, we make the constructors return this to match gcc
980 #define TARGET_CXX_CDTOR_RETURNS_THIS (darwin_kextabi_p)
981 extern int flag_mkernel;
982 extern int flag_apple_kext;
983 #define TARGET_KEXTABI flag_apple_kext
985 #define TARGET_HAS_TARGETCM 1
987 #endif /* CONFIG_DARWIN_H */