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 /* Suppress g++ attempt to link in the math library automatically. */
44 #define MATH_LIBRARY ""
50 /* Define an empty body for the function do_global_dtors() in libgcc2.c. */
52 #define DO_GLOBAL_DTORS_BODY
54 /* The string value for __SIZE_TYPE__. */
57 #define SIZE_TYPE "long unsigned int"
60 /* Type used for ptrdiff_t, as a string used in a declaration. */
63 #define PTRDIFF_TYPE "int"
68 #define WCHAR_TYPE "int"
69 #undef WCHAR_TYPE_SIZE
70 #define WCHAR_TYPE_SIZE 32
72 /* Default to using the NeXT-style runtime, since that's what is
73 pre-installed on Darwin systems. */
75 #define NEXT_OBJC_RUNTIME
77 /* Don't default to pcc-struct-return, because gcc is the only compiler, and
78 we want to retain compatibility with older gcc versions. */
80 #undef DEFAULT_PCC_STRUCT_RETURN
81 #define DEFAULT_PCC_STRUCT_RETURN 0
83 /* True if pragma ms_struct is in effect. */
84 extern GTY(()) int darwin_ms_struct;
86 /* This table intercepts weirdo options whose names would interfere
87 with normal driver conventions, and either translates them into
88 standardly-named options, or adds a 'Z' so that they can get to
89 specs processing without interference.
91 Do not expand a linker option to "-Xlinker -<option>", since that
92 forfeits the ability to control via spec strings later. However,
93 as a special exception, do this translation with -filelist, because
94 otherwise the driver will think there are no input files and quit.
95 (The alternative would be to hack the driver to recognize -filelist
96 specially, but it's simpler to use the translation table.)
98 Note that an option name with a prefix that matches another option
99 name, that also takes an argument, needs to be modified so the
100 prefix is different, otherwise a '*' after the shorter option will
101 match with the longer one.
103 The SUBTARGET_OPTION_TRANSLATE_TABLE macro, which _must_ be defined
104 in gcc/config/{i386,rs6000}/darwin.h, should contain any additional
105 command-line option translations specific to the particular target
108 #define TARGET_OPTION_TRANSLATE_TABLE \
109 { "-all_load", "-Zall_load" }, \
110 { "-allowable_client", "-Zallowable_client" }, \
111 { "-arch_errors_fatal", "-Zarch_errors_fatal" }, \
112 { "-bind_at_load", "-Zbind_at_load" }, \
113 { "-bundle", "-Zbundle" }, \
114 { "-bundle_loader", "-Zbundle_loader" }, \
115 { "-weak_reference_mismatches", "-Zweak_reference_mismatches" }, \
116 { "-dead_strip", "-Zdead_strip" }, \
117 { "-no_dead_strip_inits_and_terms", "-Zno_dead_strip_inits_and_terms" }, \
118 { "-dependency-file", "-MF" }, \
119 { "-dylib_file", "-Zdylib_file" }, \
120 { "-dynamic", "-Zdynamic" }, \
121 { "-dynamiclib", "-Zdynamiclib" }, \
122 { "-exported_symbols_list", "-Zexported_symbols_list" }, \
123 { "-gfull", "-g -fno-eliminate-unused-debug-symbols" }, \
124 { "-gused", "-g -feliminate-unused-debug-symbols" }, \
125 { "-segaddr", "-Zsegaddr" }, \
126 { "-segs_read_only_addr", "-Zsegs_read_only_addr" }, \
127 { "-segs_read_write_addr", "-Zsegs_read_write_addr" }, \
128 { "-seg_addr_table", "-Zseg_addr_table" }, \
129 { "-seg_addr_table_filename", "-Zfn_seg_addr_table_filename" }, \
130 { "-filelist", "-Xlinker -filelist -Xlinker" }, \
131 { "-framework", "-Xlinker -framework -Xlinker" }, \
132 { "-flat_namespace", "-Zflat_namespace" }, \
133 { "-force_cpusubtype_ALL", "-Zforce_cpusubtype_ALL" }, \
134 { "-force_flat_namespace", "-Zforce_flat_namespace" }, \
135 { "-image_base", "-Zimage_base" }, \
136 { "-init", "-Zinit" }, \
137 { "-install_name", "-Zinstall_name" }, \
138 { "-multiply_defined_unused", "-Zmultiplydefinedunused" }, \
139 { "-multiply_defined", "-Zmultiply_defined" }, \
140 { "-multi_module", "-Zmulti_module" }, \
141 { "-static", "-static -Wa,-static" }, \
142 { "-single_module", "-Zsingle_module" }, \
143 { "-unexported_symbols_list", "-Zunexported_symbols_list" }, \
144 SUBTARGET_OPTION_TRANSLATE_TABLE
146 /* These compiler options take n arguments. */
148 #undef WORD_SWITCH_TAKES_ARG
149 #define WORD_SWITCH_TAKES_ARG(STR) \
150 (DEFAULT_WORD_SWITCH_TAKES_ARG (STR) ? 1 : \
151 !strcmp (STR, "Zallowable_client") ? 1 : \
152 !strcmp (STR, "arch") ? 1 : \
153 !strcmp (STR, "arch_only") ? 1 : \
154 !strcmp (STR, "Zbundle_loader") ? 1 : \
155 !strcmp (STR, "client_name") ? 1 : \
156 !strcmp (STR, "compatibility_version") ? 1 : \
157 !strcmp (STR, "current_version") ? 1 : \
158 !strcmp (STR, "Zdylib_file") ? 1 : \
159 !strcmp (STR, "Zexported_symbols_list") ? 1 : \
160 !strcmp (STR, "Zimage_base") ? 1 : \
161 !strcmp (STR, "Zinit") ? 1 : \
162 !strcmp (STR, "Zinstall_name") ? 1 : \
163 !strcmp (STR, "Zmultiplydefinedunused") ? 1 : \
164 !strcmp (STR, "Zmultiply_defined") ? 1 : \
165 !strcmp (STR, "precomp-trustfile") ? 1 : \
166 !strcmp (STR, "read_only_relocs") ? 1 : \
167 !strcmp (STR, "sectcreate") ? 3 : \
168 !strcmp (STR, "sectorder") ? 3 : \
169 !strcmp (STR, "Zsegaddr") ? 2 : \
170 !strcmp (STR, "Zsegs_read_only_addr") ? 1 : \
171 !strcmp (STR, "Zsegs_read_write_addr") ? 1 : \
172 !strcmp (STR, "Zseg_addr_table") ? 1 : \
173 !strcmp (STR, "Zfn_seg_addr_table_filename") ? 1 :\
174 !strcmp (STR, "seg1addr") ? 1 : \
175 !strcmp (STR, "segprot") ? 3 : \
176 !strcmp (STR, "sub_library") ? 1 : \
177 !strcmp (STR, "sub_umbrella") ? 1 : \
178 !strcmp (STR, "umbrella") ? 1 : \
179 !strcmp (STR, "undefined") ? 1 : \
180 !strcmp (STR, "Zunexported_symbols_list") ? 1 : \
181 !strcmp (STR, "Zweak_reference_mismatches") ? 1 : \
182 !strcmp (STR, "pagezero_size") ? 1 : \
183 !strcmp (STR, "segs_read_only_addr") ? 1 : \
184 !strcmp (STR, "segs_read_write_addr") ? 1 : \
185 !strcmp (STR, "sectalign") ? 3 : \
186 !strcmp (STR, "sectobjectsymbols") ? 2 : \
187 !strcmp (STR, "segcreate") ? 3 : \
188 !strcmp (STR, "dylinker_install_name") ? 1 : \
191 /* Machine dependent cpp options. Don't add more options here, add
192 them to darwin_cpp_builtins in darwin-c.c. */
195 #define CPP_SPEC "%{static:%{!dynamic:-D__STATIC__}}%{!static:-D__DYNAMIC__}"
197 /* This is mostly a clone of the standard LINK_COMMAND_SPEC, plus
198 precomp, libtool, and fat build additions. Also we
199 don't specify a second %G after %L because libSystem is
200 self-contained and doesn't need to link against libgcc.a. */
201 /* In general, random Darwin linker flags should go into LINK_SPEC
202 instead of LINK_COMMAND_SPEC. The command spec is better for
203 specifying the handling of options understood by generic Unix
204 linkers, and for positional arguments like libraries. */
205 #define LINK_COMMAND_SPEC "\
206 %{!fdump=*:%{!fsyntax-only:%{!precomp:%{!c:%{!M:%{!MM:%{!E:%{!S:\
207 %{!Zdynamiclib:%(linker)}%{Zdynamiclib:/usr/bin/libtool} \
208 %l %X %{d} %{s} %{t} %{Z} \
209 %{!Zdynamiclib:%{A} %{e*} %{m} %{N} %{n} %{r} %{u*} %{x} %{z}} \
210 %{@:-o %f%u.out}%{!@:%{o*}%{!o:-o a.out}} \
211 %{!A:%{!nostdlib:%{!nostartfiles:%S}}} \
212 %{L*} %{fopenmp:%:include(libgomp.spec)%(link_gomp)} \
213 %(link_libgcc) %o %{fprofile-arcs|fprofile-generate|coverage:-lgcov} \
214 %{!nostdlib:%{!nodefaultlibs:%(link_ssp) %G %L}} \
215 %{!A:%{!nostdlib:%{!nostartfiles:%E}}} %{T*} %{F*} }}}}}}}}"
217 /* Please keep the random linker options in alphabetical order (modulo
218 'Z' and 'no' prefixes). Options that can only go to one of libtool
219 or ld must be listed twice, under both !Zdynamiclib and
220 Zdynamiclib, with one of the cases reporting an error. */
221 /* Note that options taking arguments may appear multiple times on a
222 command line with different arguments each time, so put a * after
223 their names so all of them get passed. */
225 "%{static}%{!static:-dynamic} \
226 %{fgnu-runtime:%:replace-outfile(-lobjc -lobjc-gnu)}\
228 %{Zforce_cpusubtype_ALL:-arch %(darwin_arch) -force_cpusubtype_ALL} \
229 %{!Zforce_cpusubtype_ALL:-arch %(darwin_subarch)} \
231 %{Zbundle_loader*:-bundle_loader %*} \
233 %{compatibility_version*:%e-compatibility_version only allowed with -dynamiclib\
235 %{current_version*:%e-current_version only allowed with -dynamiclib} \
236 %{Zforce_flat_namespace:-force_flat_namespace} \
237 %{Zinstall_name*:%e-install_name only allowed with -dynamiclib} \
238 %{keep_private_externs} \
242 %{Zbundle:%e-bundle not allowed with -dynamiclib} \
243 %{Zbundle_loader*:%e-bundle_loader not allowed with -dynamiclib} \
244 %{client_name*:%e-client_name not allowed with -dynamiclib} \
245 %{compatibility_version*} \
246 %{current_version*} \
247 %{Zforce_cpusubtype_ALL:-arch_only %(darwin_arch)} \
248 %{!Zforce_cpusubtype_ALL: -arch_only %(darwin_subarch)} \
249 %{Zforce_flat_namespace:%e-force_flat_namespace not allowed with -dynamiclib} \
250 %{Zinstall_name*:-install_name %*} \
251 %{keep_private_externs:%e-keep_private_externs not allowed with -dynamiclib} \
252 %{private_bundle:%e-private_bundle not allowed with -dynamiclib} \
254 %{Zall_load:-all_load}%{Zdynamiclib:%{!Zall_load:-noall_load}} \
255 %{Zallowable_client*:-allowable_client %*} \
256 %{Zbind_at_load:-bind_at_load} \
257 %{Zarch_errors_fatal:-arch_errors_fatal} \
258 %{Zdead_strip:-dead_strip} \
259 %{Zno_dead_strip_inits_and_terms:-no_dead_strip_inits_and_terms} \
260 %{Zdylib_file*:-dylib_file %*} \
261 %{Zdynamic:-dynamic}\
262 %{Zexported_symbols_list*:-exported_symbols_list %*} \
263 %{Zflat_namespace:-flat_namespace} \
264 %{headerpad_max_install_names*} \
265 %{Zimage_base*:-image_base %*} \
267 %{mmacosx-version-min=*:-macosx_version_min %*} \
268 %{!mmacosx-version-min=*:%{shared-libgcc:-macosx_version_min 10.3}} \
270 %{Zmulti_module:-multi_module} %{Zsingle_module:-single_module} \
271 %{Zmultiply_defined*:-multiply_defined %*} \
272 %{!Zmultiply_defined*:%{shared-libgcc: \
273 %:version-compare(< 10.5 mmacosx-version-min= -multiply_defined) \
274 %:version-compare(< 10.5 mmacosx-version-min= suppress)}} \
275 %{Zmultiplydefinedunused*:-multiply_defined_unused %*} \
276 %{prebind} %{noprebind} %{nofixprebinding} %{prebind_all_twolevel_modules} \
277 %{read_only_relocs} \
278 %{sectcreate*} %{sectorder*} %{seg1addr*} %{segprot*} \
279 %{Zsegaddr*:-segaddr %*} \
280 %{Zsegs_read_only_addr*:-segs_read_only_addr %*} \
281 %{Zsegs_read_write_addr*:-segs_read_write_addr %*} \
282 %{Zseg_addr_table*: -seg_addr_table %*} \
283 %{Zfn_seg_addr_table_filename*:-seg_addr_table_filename %*} \
284 %{sub_library*} %{sub_umbrella*} \
285 %{isysroot*:-syslibroot %*} \
286 %{twolevel_namespace} %{twolevel_namespace_hints} \
289 %{Zunexported_symbols_list*:-unexported_symbols_list %*} \
290 %{Zweak_reference_mismatches*:-weak_reference_mismatches %*} \
291 %{!Zweak_reference_mismatches*:-weak_reference_mismatches non-weak} \
295 %{pagezero_size*} %{segs_read_*} %{seglinkedit} %{noseglinkedit} \
296 %{sectalign*} %{sectobjectsymbols*} %{segcreate*} %{whyload} \
297 %{whatsloaded} %{dylinker_install_name*} \
298 %{dylinker} %{Mach} "
301 /* Machine dependent libraries. */
303 #define LIB_SPEC "%{!static:-lSystem}"
305 /* Support -mmacosx-version-min by supplying different (stub) libgcc_s.dylib
306 libraries to link against, and by not linking against libgcc_s on
309 Note that by default, -lgcc_eh is not linked against! This is
310 because in a future version of Darwin the EH frame information may
311 be in a new format, or the fallback routine might be changed; if
312 you want to explicitly link against the static version of those
313 routines, because you know you don't need to unwind through system
314 libraries, you need to explicitly say -static-libgcc.
316 If it is linked against, it has to be before -lgcc, because it may
317 need symbols from -lgcc. */
318 #undef REAL_LIBGCC_SPEC
319 #define REAL_LIBGCC_SPEC \
320 "%{static-libgcc|static: -lgcc_eh -lgcc; \
321 shared-libgcc|fexceptions: \
322 %:version-compare(!> 10.5 mmacosx-version-min= -lgcc_s.10.4) \
323 %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_s.10.5) \
325 :%:version-compare(>< 10.3.9 10.5 mmacosx-version-min= -lgcc_s.10.4) \
326 %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_s.10.5) \
329 /* We specify crt0.o as -lcrt0.o so that ld will search the library path.
331 crt3.o provides __cxa_atexit on systems that don't have it. Since
332 it's only used with C++, which requires passing -shared-libgcc, key
333 off that to avoid unnecessarily adding a destructor to every
334 powerpc program built. */
336 #undef STARTFILE_SPEC
337 #define STARTFILE_SPEC \
338 "%{!Zdynamiclib:%{Zbundle:%{!static:-lbundle1.o}} \
339 %{!Zbundle:%{pg:%{static:-lgcrt0.o} \
340 %{!static:%{object:-lgcrt0.o} \
341 %{!object:%{preload:-lgcrt0.o} \
342 %{!preload:-lgcrt1.o %(darwin_crt2)}}}} \
343 %{!pg:%{static:-lcrt0.o} \
344 %{!static:%{object:-lcrt0.o} \
345 %{!object:%{preload:-lcrt0.o} \
346 %{!preload:-lcrt1.o %(darwin_crt2)}}}}}} \
347 %{shared-libgcc:%:version-compare(< 10.5 mmacosx-version-min= crt3.o%s)}"
349 /* The native Darwin linker doesn't necessarily place files in the order
350 that they're specified on the link line. Thus, it is pointless
351 to put anything in ENDFILE_SPEC. */
352 /* #define ENDFILE_SPEC "" */
354 /* Default Darwin ASM_SPEC, very simple. */
355 #define ASM_SPEC "-arch %(darwin_arch) \
356 %{Zforce_cpusubtype_ALL:-force_cpusubtype_ALL}"
358 /* We use Dbx symbol format. */
360 #define DBX_DEBUGGING_INFO 1
362 /* Also enable Dwarf 2 as an option. */
363 #define DWARF2_DEBUGGING_INFO
364 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
366 #define DEBUG_FRAME_SECTION "__DWARF,__debug_frame,regular,debug"
367 #define DEBUG_INFO_SECTION "__DWARF,__debug_info,regular,debug"
368 #define DEBUG_ABBREV_SECTION "__DWARF,__debug_abbrev,regular,debug"
369 #define DEBUG_ARANGES_SECTION "__DWARF,__debug_aranges,regular,debug"
370 #define DEBUG_MACINFO_SECTION "__DWARF,__debug_macinfo,regular,debug"
371 #define DEBUG_LINE_SECTION "__DWARF,__debug_line,regular,debug"
372 #define DEBUG_LOC_SECTION "__DWARF,__debug_loc,regular,debug"
373 #define DEBUG_PUBNAMES_SECTION "__DWARF,__debug_pubnames,regular,debug"
374 #define DEBUG_STR_SECTION "__DWARF,__debug_str,regular,debug"
375 #define DEBUG_RANGES_SECTION "__DWARF,__debug_ranges,regular,debug"
377 /* When generating stabs debugging, use N_BINCL entries. */
379 #define DBX_USE_BINCL
381 /* There is no limit to the length of stabs strings. */
383 #define DBX_CONTIN_LENGTH 0
385 /* gdb needs a null N_SO at the end of each file for scattered loading. */
387 #define DBX_OUTPUT_NULL_N_SO_AT_MAIN_SOURCE_FILE_END
389 /* GCC's definition of 'one_only' is the same as its definition of 'weak'. */
390 #define MAKE_DECL_ONE_ONLY(DECL) (DECL_WEAK (DECL) = 1)
392 /* Mach-O supports 'weak imports', and 'weak definitions' in coalesced
393 sections. machopic_select_section ensures that weak variables go in
394 coalesced sections. Weak aliases (or any other kind of aliases) are
395 not supported. Weak symbols that aren't visible outside the .s file
396 are not supported. */
397 #define ASM_WEAKEN_DECL(FILE, DECL, NAME, ALIAS) \
401 warning (0, "alias definitions not supported in Mach-O; ignored"); \
405 if (! DECL_EXTERNAL (DECL) && TREE_PUBLIC (DECL)) \
406 targetm.asm_out.globalize_label (FILE, NAME); \
407 if (DECL_EXTERNAL (DECL)) \
408 fputs ("\t.weak_reference ", FILE); \
409 else if (! lookup_attribute ("weak", DECL_ATTRIBUTES (DECL)) \
410 && lookup_attribute ("weak_import", DECL_ATTRIBUTES (DECL))) \
412 else if (TREE_PUBLIC (DECL)) \
413 fputs ("\t.weak_definition ", FILE); \
416 assemble_name (FILE, NAME); \
417 fputc ('\n', FILE); \
420 /* Darwin has the pthread routines in libSystem, which every program
421 links to, so there's no need for weak-ness for that. */
422 #define GTHREAD_USE_WEAK 0
424 /* The Darwin linker imposes two limitations on common symbols: they
425 can't have hidden visibility, and they can't appear in dylibs. As
426 a consequence, we should never use common symbols to represent
428 #undef USE_COMMON_FOR_ONE_ONLY
429 #define USE_COMMON_FOR_ONE_ONLY 0
431 /* The Darwin linker doesn't want coalesced symbols to appear in
432 a static archive's table of contents. */
433 #undef TARGET_WEAK_NOT_IN_ARCHIVE_TOC
434 #define TARGET_WEAK_NOT_IN_ARCHIVE_TOC 1
436 /* On Darwin, we don't (at the time of writing) have linkonce sections
437 with names, so it's safe to make the class data not comdat. */
438 #define TARGET_CXX_CLASS_DATA_ALWAYS_COMDAT hook_bool_void_false
440 /* We make exception information linkonce. */
441 #undef TARGET_USES_WEAK_UNWIND_INFO
442 #define TARGET_USES_WEAK_UNWIND_INFO 1
444 /* We need to use a nonlocal label for the start of an EH frame: the
445 Darwin linker requires that a coalesced section start with a label.
446 Unfortunately, it also requires that 'debug' sections don't contain
448 #undef FRAME_BEGIN_LABEL
449 #define FRAME_BEGIN_LABEL (for_eh ? "EH_frame" : "Lframe")
451 /* Emit a label for the FDE corresponding to DECL. EMPTY means
452 emit a label for an empty FDE. */
453 #define TARGET_ASM_EMIT_UNWIND_LABEL darwin_emit_unwind_label
455 /* Emit a label to separate the exception table. */
456 #define TARGET_ASM_EMIT_EXCEPT_TABLE_LABEL darwin_emit_except_table_label
458 /* Our profiling scheme doesn't LP labels and counter words. */
460 #define NO_PROFILE_COUNTERS 1
462 #undef INIT_SECTION_ASM_OP
463 #define INIT_SECTION_ASM_OP
467 #define TARGET_ASM_CONSTRUCTOR machopic_asm_out_constructor
468 #define TARGET_ASM_DESTRUCTOR machopic_asm_out_destructor
470 /* Always prefix with an underscore. */
472 #define USER_LABEL_PREFIX "_"
474 /* Don't output a .file directive. That is only used by the assembler for
476 #undef TARGET_ASM_FILE_START_FILE_DIRECTIVE
477 #define TARGET_ASM_FILE_START_FILE_DIRECTIVE false
479 #undef TARGET_ASM_FILE_END
480 #define TARGET_ASM_FILE_END darwin_file_end
482 #define ASM_OUTPUT_SKIP(FILE,SIZE) \
483 fprintf (FILE, "\t.space "HOST_WIDE_INT_PRINT_UNSIGNED"\n", SIZE)
485 /* Give ObjC methods pretty symbol names. */
487 #undef OBJC_GEN_METHOD_LABEL
488 #define OBJC_GEN_METHOD_LABEL(BUF,IS_INST,CLASS_NAME,CAT_NAME,SEL_NAME,NUM) \
490 sprintf (BUF, "%c[%s(%s) %s]", (IS_INST) ? '-' : '+', \
491 (CLASS_NAME), (CAT_NAME), (SEL_NAME)); \
493 sprintf (BUF, "%c[%s %s]", (IS_INST) ? '-' : '+', \
494 (CLASS_NAME), (SEL_NAME)); \
497 /* The RTTI data (e.g., __ti4name) is common and public (and static),
498 but it does need to be referenced via indirect PIC data pointers.
499 The machopic_define_symbol calls are telling the machopic subsystem
500 that the name *is* defined in this module, so it doesn't need to
501 make them indirect. */
503 #undef ASM_DECLARE_OBJECT_NAME
504 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL) \
506 const char *xname = NAME; \
507 if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF) \
508 xname = IDENTIFIER_POINTER (DECL_NAME (DECL)); \
509 if (! DECL_WEAK (DECL) \
510 && ((TREE_STATIC (DECL) \
511 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
512 || DECL_INITIAL (DECL))) \
513 machopic_define_symbol (DECL_RTL (DECL)); \
514 if ((TREE_STATIC (DECL) \
515 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
516 || DECL_INITIAL (DECL)) \
517 (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false); \
518 ASM_OUTPUT_LABEL (FILE, xname); \
519 /* Darwin doesn't support zero-size objects, so give them a \
521 if (tree_low_cst (DECL_SIZE_UNIT (DECL), 1) == 0) \
522 assemble_zeros (1); \
525 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
527 const char *xname = NAME; \
528 if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF) \
529 xname = IDENTIFIER_POINTER (DECL_NAME (DECL)); \
530 if (! DECL_WEAK (DECL) \
531 && ((TREE_STATIC (DECL) \
532 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
533 || DECL_INITIAL (DECL))) \
534 machopic_define_symbol (DECL_RTL (DECL)); \
535 if ((TREE_STATIC (DECL) \
536 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
537 || DECL_INITIAL (DECL)) \
538 (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false); \
539 ASM_OUTPUT_LABEL (FILE, xname); \
542 #define ASM_DECLARE_CONSTANT_NAME(FILE, NAME, EXP, SIZE) \
544 ASM_OUTPUT_LABEL (FILE, NAME); \
545 /* Darwin doesn't support zero-size objects, so give them a \
548 assemble_zeros (1); \
551 /* Wrap new method names in quotes so the assembler doesn't gag.
552 Make Objective-C internal symbols local. */
554 #undef ASM_OUTPUT_LABELREF
555 #define ASM_OUTPUT_LABELREF(FILE,NAME) \
557 const char *xname = (NAME); \
558 if (! strcmp (xname, "<pic base>")) \
559 machopic_output_function_base_name(FILE); \
560 else if (xname[0] == '&' || xname[0] == '*') \
562 int len = strlen (xname); \
563 if (len > 6 && !strcmp ("$stub", xname + len - 5)) \
564 machopic_validate_stub_or_non_lazy_ptr (xname); \
565 else if (len > 7 && !strcmp ("$stub\"", xname + len - 6)) \
566 machopic_validate_stub_or_non_lazy_ptr (xname); \
567 else if (len > 14 && !strcmp ("$non_lazy_ptr", xname + len - 13)) \
568 machopic_validate_stub_or_non_lazy_ptr (xname); \
569 else if (len > 15 && !strcmp ("$non_lazy_ptr\"", xname + len - 14)) \
570 machopic_validate_stub_or_non_lazy_ptr (xname); \
571 if (xname[1] != '"' && name_needs_quotes (&xname[1])) \
572 fprintf (FILE, "\"%s\"", &xname[1]); \
574 fputs (&xname[1], FILE); \
576 else if (xname[0] == '+' || xname[0] == '-') \
577 fprintf (FILE, "\"%s\"", xname); \
578 else if (!strncmp (xname, "_OBJC_", 6)) \
579 fprintf (FILE, "L%s", xname); \
580 else if (!strncmp (xname, ".objc_class_name_", 17)) \
581 fprintf (FILE, "%s", xname); \
582 else if (xname[0] != '"' && name_needs_quotes (xname)) \
583 fprintf (FILE, "\"%s\"", xname); \
585 asm_fprintf (FILE, "%U%s", xname); \
588 /* Output before executable code. */
589 #undef TEXT_SECTION_ASM_OP
590 #define TEXT_SECTION_ASM_OP "\t.text"
592 /* Output before writable data. */
594 #undef DATA_SECTION_ASM_OP
595 #define DATA_SECTION_ASM_OP "\t.data"
598 #define ALIGN_ASM_OP ".align"
600 #undef ASM_OUTPUT_ALIGN
601 #define ASM_OUTPUT_ALIGN(FILE,LOG) \
603 fprintf (FILE, "\t%s %d\n", ALIGN_ASM_OP, (LOG))
605 /* Ensure correct alignment of bss data. */
607 #undef ASM_OUTPUT_ALIGNED_DECL_LOCAL
608 #define ASM_OUTPUT_ALIGNED_DECL_LOCAL(FILE, DECL, NAME, SIZE, ALIGN) \
610 unsigned HOST_WIDE_INT _new_size = SIZE; \
611 fputs (".lcomm ", (FILE)); \
612 assemble_name ((FILE), (NAME)); \
613 if (_new_size == 0) _new_size = 1; \
614 fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED",%u\n", _new_size, \
615 floor_log2 ((ALIGN) / BITS_PER_UNIT)); \
616 if ((DECL) && ((TREE_STATIC (DECL) \
617 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
618 || DECL_INITIAL (DECL))) \
620 (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false); \
621 machopic_define_symbol (DECL_RTL (DECL)); \
625 /* The maximum alignment which the object file format can support.
626 For Mach-O, this is 2^15. */
628 #undef MAX_OFILE_ALIGNMENT
629 #define MAX_OFILE_ALIGNMENT 0x8000
631 /* Declare the section variables. */
632 #ifndef USED_FOR_TARGET
633 enum darwin_section_enum {
634 #define DEF_SECTION(NAME, FLAGS, DIRECTIVE, OBJC) NAME,
635 #include "darwin-sections.def"
639 extern GTY(()) section * darwin_sections[NUM_DARWIN_SECTIONS];
642 #undef TARGET_ASM_SELECT_SECTION
643 #define TARGET_ASM_SELECT_SECTION machopic_select_section
644 #define USE_SELECT_SECTION_FOR_FUNCTIONS
646 #undef TARGET_ASM_SELECT_RTX_SECTION
647 #define TARGET_ASM_SELECT_RTX_SECTION machopic_select_rtx_section
648 #undef TARGET_ASM_UNIQUE_SECTION
649 #define TARGET_ASM_UNIQUE_SECTION darwin_unique_section
650 #undef TARGET_ASM_FUNCTION_RODATA_SECTION
651 #define TARGET_ASM_FUNCTION_RODATA_SECTION default_no_function_rodata_section
654 #define ASM_DECLARE_UNRESOLVED_REFERENCE(FILE,NAME) \
657 if (MACHOPIC_INDIRECT) \
658 fprintf (FILE, "\t.lazy_reference "); \
660 fprintf (FILE, "\t.reference "); \
661 assemble_name (FILE, NAME); \
662 fprintf (FILE, "\n"); \
666 #define ASM_DECLARE_CLASS_REFERENCE(FILE,NAME) \
669 fprintf (FILE, "\t"); \
670 assemble_name (FILE, NAME); \
671 fprintf (FILE, "=0\n"); \
672 (*targetm.asm_out.globalize_label) (FILE, NAME); \
676 /* Globalizing directive for a label. */
677 #define GLOBAL_ASM_OP ".globl "
678 #define TARGET_ASM_GLOBALIZE_LABEL darwin_globalize_label
680 /* Emit an assembler directive to set visibility for a symbol. Used
681 to support visibility attribute and Darwin's private extern
683 #undef TARGET_ASM_ASSEMBLE_VISIBILITY
684 #define TARGET_ASM_ASSEMBLE_VISIBILITY darwin_assemble_visibility
686 /* Extra attributes for Darwin. */
687 #define SUBTARGET_ATTRIBUTE_TABLE \
688 /* { name, min_len, max_len, decl_req, type_req, fn_type_req, handler } */ \
689 { "weak_import", 0, 0, true, false, false, \
690 darwin_handle_weak_import_attribute }
692 #undef ASM_GENERATE_INTERNAL_LABEL
693 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM) \
694 sprintf (LABEL, "*%s%ld", PREFIX, (long)(NUM))
696 #undef TARGET_ASM_MARK_DECL_PRESERVED
697 #define TARGET_ASM_MARK_DECL_PRESERVED darwin_mark_decl_preserved
699 /* Set on a symbol with SYMBOL_FLAG_FUNCTION or
700 MACHO_SYMBOL_FLAG_VARIABLE to indicate that the function or
701 variable has been defined in this translation unit. */
703 #define MACHO_SYMBOL_FLAG_VARIABLE (SYMBOL_FLAG_MACH_DEP)
704 #define MACHO_SYMBOL_FLAG_DEFINED ((SYMBOL_FLAG_MACH_DEP) << 1)
706 /* Set on a symbol to indicate when fix-and-continue style code
707 generation is being used and the symbol refers to a static symbol
708 that should be rebound from new instances of a translation unit to
709 the original instance of the data. */
711 #define MACHO_SYMBOL_STATIC ((SYMBOL_FLAG_MACH_DEP) << 2)
713 /* Symbolic names for various things we might know about a symbol. */
715 enum machopic_addr_class {
717 MACHOPIC_DEFINED_DATA,
718 MACHOPIC_UNDEFINED_DATA,
719 MACHOPIC_DEFINED_FUNCTION,
720 MACHOPIC_UNDEFINED_FUNCTION
723 /* Macros defining the various PIC cases. */
725 #define MACHO_DYNAMIC_NO_PIC_P (TARGET_DYNAMIC_NO_PIC)
726 #define MACHOPIC_INDIRECT (flag_pic || MACHO_DYNAMIC_NO_PIC_P)
727 #define MACHOPIC_JUST_INDIRECT (MACHO_DYNAMIC_NO_PIC_P)
728 #define MACHOPIC_PURE (flag_pic && ! MACHO_DYNAMIC_NO_PIC_P)
730 #undef TARGET_ENCODE_SECTION_INFO
731 #define TARGET_ENCODE_SECTION_INFO darwin_encode_section_info
732 #undef TARGET_STRIP_NAME_ENCODING
733 #define TARGET_STRIP_NAME_ENCODING default_strip_name_encoding
735 #define GEN_BINDER_NAME_FOR_STUB(BUF,STUB,STUB_LENGTH) \
737 const char *const stub_ = (STUB); \
738 char *buffer_ = (BUF); \
739 strcpy (buffer_, stub_); \
740 if (stub_[0] == '"') \
742 strcpy (buffer_ + (STUB_LENGTH) - 1, "_binder\""); \
746 strcpy (buffer_ + (STUB_LENGTH), "_binder"); \
750 #define GEN_SYMBOL_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH) \
752 const char *const symbol_ = (SYMBOL); \
753 char *buffer_ = (BUF); \
754 if (name_needs_quotes (symbol_) && symbol_[0] != '"') \
756 sprintf (buffer_, "\"%s\"", symbol_); \
760 strcpy (buffer_, symbol_); \
764 /* Given a symbol name string, create the lazy pointer version
765 of the symbol name. */
767 #define GEN_LAZY_PTR_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH) \
769 const char *symbol_ = (SYMBOL); \
770 char *buffer_ = (BUF); \
771 if (symbol_[0] == '"') \
773 strcpy (buffer_, "\"L"); \
774 strcpy (buffer_ + 2, symbol_ + 1); \
775 strcpy (buffer_ + (SYMBOL_LENGTH), "$lazy_ptr\""); \
777 else if (name_needs_quotes (symbol_)) \
779 strcpy (buffer_, "\"L"); \
780 strcpy (buffer_ + 2, symbol_); \
781 strcpy (buffer_ + (SYMBOL_LENGTH) + 2, "$lazy_ptr\""); \
785 strcpy (buffer_, "L"); \
786 strcpy (buffer_ + 1, symbol_); \
787 strcpy (buffer_ + (SYMBOL_LENGTH) + 1, "$lazy_ptr"); \
791 #define EH_FRAME_SECTION_NAME "__TEXT"
792 #define EH_FRAME_SECTION_ATTR ",coalesced,no_toc+strip_static_syms+live_support"
794 /* Java runtime class list. */
795 #define JCR_SECTION_NAME "__DATA,jcr,regular,no_dead_strip"
797 #undef ASM_PREFERRED_EH_DATA_FORMAT
798 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL) \
799 (((CODE) == 2 && (GLOBAL) == 1) \
800 ? (DW_EH_PE_pcrel | DW_EH_PE_indirect | DW_EH_PE_sdata4) : \
801 ((CODE) == 1 || (GLOBAL) == 0) ? DW_EH_PE_pcrel : DW_EH_PE_absptr)
803 #define ASM_OUTPUT_DWARF_DELTA(FILE,SIZE,LABEL1,LABEL2) \
804 darwin_asm_output_dwarf_delta (FILE, SIZE, LABEL1, LABEL2)
806 #define ASM_OUTPUT_DWARF_OFFSET(FILE,SIZE,LABEL,BASE) \
807 darwin_asm_output_dwarf_offset (FILE, SIZE, LABEL, BASE)
809 #define ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX(ASM_OUT_FILE, ENCODING, SIZE, ADDR, DONE) \
810 if (ENCODING == ASM_PREFERRED_EH_DATA_FORMAT (2, 1)) { \
811 darwin_non_lazy_pcrel (ASM_OUT_FILE, ADDR); \
815 #define TARGET_ASM_OUTPUT_ANCHOR darwin_asm_output_anchor
817 /* Experimentally, putting jump tables in text is faster on SPEC.
818 Also this is needed for correctness for coalesced functions. */
820 #ifndef JUMP_TABLES_IN_TEXT_SECTION
821 #define JUMP_TABLES_IN_TEXT_SECTION 1
824 #define TARGET_TERMINATE_DW2_EH_FRAME_INFO false
826 #define TARGET_ASM_INIT_SECTIONS darwin_init_sections
827 #undef TARGET_ASM_NAMED_SECTION
828 #define TARGET_ASM_NAMED_SECTION darwin_asm_named_section
830 #define DARWIN_REGISTER_TARGET_PRAGMAS() \
832 c_register_pragma (0, "mark", darwin_pragma_ignore); \
833 c_register_pragma (0, "options", darwin_pragma_options); \
834 c_register_pragma (0, "segment", darwin_pragma_ignore); \
835 c_register_pragma (0, "unused", darwin_pragma_unused); \
836 c_register_pragma (0, "ms_struct", darwin_pragma_ms_struct); \
840 #define ASM_APP_ON ""
842 #define ASM_APP_OFF ""
844 void darwin_register_frameworks (const char *, const char *, int);
845 void darwin_register_objc_includes (const char *, const char *, int);
846 #define TARGET_EXTRA_PRE_INCLUDES darwin_register_objc_includes
847 #define TARGET_EXTRA_INCLUDES darwin_register_frameworks
849 void add_framework_path (char *);
850 #define TARGET_OPTF add_framework_path
852 #define TARGET_POSIX_IO
854 /* All new versions of Darwin have C99 functions. */
855 #define TARGET_C99_FUNCTIONS 1
857 #define WINT_TYPE "int"
859 /* Every program on darwin links against libSystem which contains the pthread
860 routines, so there's no need to explicitly call out when doing threaded
862 #undef GOMP_SELF_SPECS
863 #define GOMP_SELF_SPECS ""
865 #endif /* CONFIG_DARWIN_H */