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 /* This table intercepts weirdo options whose names would interfere
84 with normal driver conventions, and either translates them into
85 standardly-named options, or adds a 'Z' so that they can get to
86 specs processing without interference.
88 Do not expand a linker option to "-Xlinker -<option>", since that
89 forfeits the ability to control via spec strings later. However,
90 as a special exception, do this translation with -filelist, because
91 otherwise the driver will think there are no input files and quit.
92 (The alternative would be to hack the driver to recognize -filelist
93 specially, but it's simpler to use the translation table.)
95 Note that an option name with a prefix that matches another option
96 name, that also takes an argument, needs to be modified so the
97 prefix is different, otherwise a '*' after the shorter option will
98 match with the longer one.
100 The SUBTARGET_OPTION_TRANSLATE_TABLE macro, which _must_ be defined
101 in gcc/config/{i386,rs6000}/darwin.h, should contain any additional
102 command-line option translations specific to the particular target
105 #define TARGET_OPTION_TRANSLATE_TABLE \
106 { "-all_load", "-Zall_load" }, \
107 { "-allowable_client", "-Zallowable_client" }, \
108 { "-arch_errors_fatal", "-Zarch_errors_fatal" }, \
109 { "-bind_at_load", "-Zbind_at_load" }, \
110 { "-bundle", "-Zbundle" }, \
111 { "-bundle_loader", "-Zbundle_loader" }, \
112 { "-weak_reference_mismatches", "-Zweak_reference_mismatches" }, \
113 { "-dead_strip", "-Zdead_strip" }, \
114 { "-no_dead_strip_inits_and_terms", "-Zno_dead_strip_inits_and_terms" }, \
115 { "-dependency-file", "-MF" }, \
116 { "-dylib_file", "-Zdylib_file" }, \
117 { "-dynamic", "-Zdynamic" }, \
118 { "-dynamiclib", "-Zdynamiclib" }, \
119 { "-exported_symbols_list", "-Zexported_symbols_list" }, \
120 { "-gfull", "-g -fno-eliminate-unused-debug-symbols" }, \
121 { "-gused", "-g -feliminate-unused-debug-symbols" }, \
122 { "-segaddr", "-Zsegaddr" }, \
123 { "-segs_read_only_addr", "-Zsegs_read_only_addr" }, \
124 { "-segs_read_write_addr", "-Zsegs_read_write_addr" }, \
125 { "-seg_addr_table", "-Zseg_addr_table" }, \
126 { "-seg_addr_table_filename", "-Zfn_seg_addr_table_filename" }, \
127 { "-filelist", "-Xlinker -filelist -Xlinker" }, \
128 { "-framework", "-Xlinker -framework -Xlinker" }, \
129 { "-flat_namespace", "-Zflat_namespace" }, \
130 { "-force_cpusubtype_ALL", "-Zforce_cpusubtype_ALL" }, \
131 { "-force_flat_namespace", "-Zforce_flat_namespace" }, \
132 { "-image_base", "-Zimage_base" }, \
133 { "-init", "-Zinit" }, \
134 { "-install_name", "-Zinstall_name" }, \
135 { "-multiply_defined_unused", "-Zmultiplydefinedunused" }, \
136 { "-multiply_defined", "-Zmultiply_defined" }, \
137 { "-multi_module", "-Zmulti_module" }, \
138 { "-static", "-static -Wa,-static" }, \
139 { "-single_module", "-Zsingle_module" }, \
140 { "-unexported_symbols_list", "-Zunexported_symbols_list" }, \
141 SUBTARGET_OPTION_TRANSLATE_TABLE
143 /* These compiler options take n arguments. */
145 #undef WORD_SWITCH_TAKES_ARG
146 #define WORD_SWITCH_TAKES_ARG(STR) \
147 (DEFAULT_WORD_SWITCH_TAKES_ARG (STR) ? 1 : \
148 !strcmp (STR, "Zallowable_client") ? 1 : \
149 !strcmp (STR, "arch") ? 1 : \
150 !strcmp (STR, "arch_only") ? 1 : \
151 !strcmp (STR, "Zbundle_loader") ? 1 : \
152 !strcmp (STR, "client_name") ? 1 : \
153 !strcmp (STR, "compatibility_version") ? 1 : \
154 !strcmp (STR, "current_version") ? 1 : \
155 !strcmp (STR, "Zdylib_file") ? 1 : \
156 !strcmp (STR, "Zexported_symbols_list") ? 1 : \
157 !strcmp (STR, "Zimage_base") ? 1 : \
158 !strcmp (STR, "Zinit") ? 1 : \
159 !strcmp (STR, "Zinstall_name") ? 1 : \
160 !strcmp (STR, "Zmultiplydefinedunused") ? 1 : \
161 !strcmp (STR, "Zmultiply_defined") ? 1 : \
162 !strcmp (STR, "precomp-trustfile") ? 1 : \
163 !strcmp (STR, "read_only_relocs") ? 1 : \
164 !strcmp (STR, "sectcreate") ? 3 : \
165 !strcmp (STR, "sectorder") ? 3 : \
166 !strcmp (STR, "Zsegaddr") ? 2 : \
167 !strcmp (STR, "Zsegs_read_only_addr") ? 1 : \
168 !strcmp (STR, "Zsegs_read_write_addr") ? 1 : \
169 !strcmp (STR, "Zseg_addr_table") ? 1 : \
170 !strcmp (STR, "Zfn_seg_addr_table_filename") ? 1 :\
171 !strcmp (STR, "seg1addr") ? 1 : \
172 !strcmp (STR, "segprot") ? 3 : \
173 !strcmp (STR, "sub_library") ? 1 : \
174 !strcmp (STR, "sub_umbrella") ? 1 : \
175 !strcmp (STR, "umbrella") ? 1 : \
176 !strcmp (STR, "undefined") ? 1 : \
177 !strcmp (STR, "Zunexported_symbols_list") ? 1 : \
178 !strcmp (STR, "Zweak_reference_mismatches") ? 1 : \
179 !strcmp (STR, "pagezero_size") ? 1 : \
180 !strcmp (STR, "segs_read_only_addr") ? 1 : \
181 !strcmp (STR, "segs_read_write_addr") ? 1 : \
182 !strcmp (STR, "sectalign") ? 3 : \
183 !strcmp (STR, "sectobjectsymbols") ? 2 : \
184 !strcmp (STR, "segcreate") ? 3 : \
185 !strcmp (STR, "dylinker_install_name") ? 1 : \
188 /* Machine dependent cpp options. Don't add more options here, add
189 them to darwin_cpp_builtins in darwin-c.c. */
192 #define CPP_SPEC "%{static:%{!dynamic:-D__STATIC__}}%{!static:-D__DYNAMIC__}"
194 /* This is mostly a clone of the standard LINK_COMMAND_SPEC, plus
195 precomp, libtool, and fat build additions. Also we
196 don't specify a second %G after %L because libSystem is
197 self-contained and doesn't need to link against libgcc.a. */
198 /* In general, random Darwin linker flags should go into LINK_SPEC
199 instead of LINK_COMMAND_SPEC. The command spec is better for
200 specifying the handling of options understood by generic Unix
201 linkers, and for positional arguments like libraries. */
202 #define LINK_COMMAND_SPEC "\
203 %{!fdump=*:%{!fsyntax-only:%{!precomp:%{!c:%{!M:%{!MM:%{!E:%{!S:\
204 %{!Zdynamiclib:%(linker)}%{Zdynamiclib:/usr/bin/libtool} \
205 %l %X %{d} %{s} %{t} %{Z} \
206 %{!Zdynamiclib:%{A} %{e*} %{m} %{N} %{n} %{r} %{u*} %{x} %{z}} \
207 %{@:-o %f%u.out}%{!@:%{o*}%{!o:-o a.out}} \
208 %{!Zdynamiclib:%{!A:%{!nostdlib:%{!nostartfiles:%S}}}} \
209 %{L*} %{fopenmp:%:include(libgomp.spec)%(link_gomp)} \
210 %(link_libgcc) %o %{fprofile-arcs|fprofile-generate|coverage:-lgcov} \
211 %{!nostdlib:%{!nodefaultlibs:%(link_ssp) %G %L}} \
212 %{!A:%{!nostdlib:%{!nostartfiles:%E}}} %{T*} %{F*} }}}}}}}}"
214 /* Please keep the random linker options in alphabetical order (modulo
215 'Z' and 'no' prefixes). Options that can only go to one of libtool
216 or ld must be listed twice, under both !Zdynamiclib and
217 Zdynamiclib, with one of the cases reporting an error. */
218 /* Note that options taking arguments may appear multiple times on a
219 command line with different arguments each time, so put a * after
220 their names so all of them get passed. */
222 "%{static}%{!static:-dynamic} \
223 %{fgnu-runtime:%:replace-outfile(-lobjc -lobjc-gnu)}\
225 %{Zforce_cpusubtype_ALL:-arch %(darwin_arch) -force_cpusubtype_ALL} \
226 %{!Zforce_cpusubtype_ALL:-arch %(darwin_subarch)} \
228 %{Zbundle_loader*:-bundle_loader %*} \
230 %{compatibility_version*:%e-compatibility_version only allowed with -dynamiclib\
232 %{current_version*:%e-current_version only allowed with -dynamiclib} \
233 %{Zforce_flat_namespace:-force_flat_namespace} \
234 %{Zinstall_name*:%e-install_name only allowed with -dynamiclib} \
235 %{keep_private_externs} \
239 %{Zbundle:%e-bundle not allowed with -dynamiclib} \
240 %{Zbundle_loader*:%e-bundle_loader not allowed with -dynamiclib} \
241 %{client_name*:%e-client_name not allowed with -dynamiclib} \
242 %{compatibility_version*} \
243 %{current_version*} \
244 %{Zforce_cpusubtype_ALL:-arch_only %(darwin_arch)} \
245 %{!Zforce_cpusubtype_ALL: -arch_only %(darwin_subarch)} \
246 %{Zforce_flat_namespace:%e-force_flat_namespace not allowed with -dynamiclib} \
247 %{Zinstall_name*:-install_name %*} \
248 %{keep_private_externs:%e-keep_private_externs not allowed with -dynamiclib} \
249 %{private_bundle:%e-private_bundle not allowed with -dynamiclib} \
251 %{Zall_load:-all_load}%{Zdynamiclib:%{!Zall_load:-noall_load}} \
252 %{Zallowable_client*:-allowable_client %*} \
253 %{Zbind_at_load:-bind_at_load} \
254 %{Zarch_errors_fatal:-arch_errors_fatal} \
255 %{Zdead_strip:-dead_strip} \
256 %{Zno_dead_strip_inits_and_terms:-no_dead_strip_inits_and_terms} \
257 %{Zdylib_file*:-dylib_file %*} \
258 %{Zdynamic:-dynamic}\
259 %{Zexported_symbols_list*:-exported_symbols_list %*} \
260 %{Zflat_namespace:-flat_namespace} \
261 %{headerpad_max_install_names*} \
262 %{Zimage_base*:-image_base %*} \
264 %{mmacosx-version-min=*:-macosx_version_min %*} \
265 %{!mmacosx-version-min=*:%{shared-libgcc:-macosx_version_min 10.3}} \
267 %{Zmulti_module:-multi_module} %{Zsingle_module:-single_module} \
268 %{Zmultiply_defined*:-multiply_defined %*} \
269 %{!Zmultiply_defined*:%{shared-libgcc: \
270 %:version-compare(< 10.5 mmacosx-version-min= -multiply_defined) \
271 %:version-compare(< 10.5 mmacosx-version-min= suppress)}} \
272 %{Zmultiplydefinedunused*:-multiply_defined_unused %*} \
273 %{prebind} %{noprebind} %{nofixprebinding} %{prebind_all_twolevel_modules} \
274 %{read_only_relocs} \
275 %{sectcreate*} %{sectorder*} %{seg1addr*} %{segprot*} \
276 %{Zsegaddr*:-segaddr %*} \
277 %{Zsegs_read_only_addr*:-segs_read_only_addr %*} \
278 %{Zsegs_read_write_addr*:-segs_read_write_addr %*} \
279 %{Zseg_addr_table*: -seg_addr_table %*} \
280 %{Zfn_seg_addr_table_filename*:-seg_addr_table_filename %*} \
281 %{sub_library*} %{sub_umbrella*} \
282 %{isysroot*:-syslibroot %*} \
283 %{twolevel_namespace} %{twolevel_namespace_hints} \
286 %{Zunexported_symbols_list*:-unexported_symbols_list %*} \
287 %{Zweak_reference_mismatches*:-weak_reference_mismatches %*} \
288 %{!Zweak_reference_mismatches*:-weak_reference_mismatches non-weak} \
292 %{pagezero_size*} %{segs_read_*} %{seglinkedit} %{noseglinkedit} \
293 %{sectalign*} %{sectobjectsymbols*} %{segcreate*} %{whyload} \
294 %{whatsloaded} %{dylinker_install_name*} \
295 %{dylinker} %{Mach} "
298 /* Machine dependent libraries. */
300 #define LIB_SPEC "%{!static:-lSystem}"
302 /* Support -mmacosx-version-min by supplying different (stub) libgcc_s.dylib
303 libraries to link against, and by not linking against libgcc_s on
306 Note that by default, -lgcc_eh is not linked against! This is
307 because in a future version of Darwin the EH frame information may
308 be in a new format, or the fallback routine might be changed; if
309 you want to explicitly link against the static version of those
310 routines, because you know you don't need to unwind through system
311 libraries, you need to explicitly say -static-libgcc.
313 If it is linked against, it has to be before -lgcc, because it may
314 need symbols from -lgcc. */
315 #undef REAL_LIBGCC_SPEC
316 #define REAL_LIBGCC_SPEC \
317 "%{static-libgcc|static: -lgcc_eh -lgcc; \
318 shared-libgcc|fexceptions: \
319 %:version-compare(!> 10.5 mmacosx-version-min= -lgcc_s.10.4) \
320 %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_s.10.5) \
322 :%:version-compare(>< 10.3.9 10.5 mmacosx-version-min= -lgcc_s.10.4) \
323 %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_s.10.5) \
326 /* We specify crt0.o as -lcrt0.o so that ld will search the library path.
328 crt3.o provides __cxa_atexit on systems that don't have it. Since
329 it's only used with C++, which requires passing -shared-libgcc, key
330 off that to avoid unnecessarily adding a destructor to every
331 powerpc program built. */
333 #undef STARTFILE_SPEC
334 #define STARTFILE_SPEC \
335 "%{!Zdynamiclib:%{Zbundle:%{!static:-lbundle1.o}} \
336 %{!Zbundle:%{pg:%{static:-lgcrt0.o} \
337 %{!static:%{object:-lgcrt0.o} \
338 %{!object:%{preload:-lgcrt0.o} \
339 %{!preload:-lgcrt1.o %(darwin_crt2)}}}} \
340 %{!pg:%{static:-lcrt0.o} \
341 %{!static:%{object:-lcrt0.o} \
342 %{!object:%{preload:-lcrt0.o} \
343 %{!preload:-lcrt1.o %(darwin_crt2)}}}}}} \
344 %{shared-libgcc:%:version-compare(< 10.5 mmacosx-version-min= -lcrt3.o)}"
346 /* The native Darwin linker doesn't necessarily place files in the order
347 that they're specified on the link line. Thus, it is pointless
348 to put anything in ENDFILE_SPEC. */
349 /* #define ENDFILE_SPEC "" */
351 /* Default Darwin ASM_SPEC, very simple. */
352 #define ASM_SPEC "-arch %(darwin_arch) \
353 %{Zforce_cpusubtype_ALL:-force_cpusubtype_ALL}"
355 /* We use Dbx symbol format. */
357 #define DBX_DEBUGGING_INFO 1
359 /* Also enable Dwarf 2 as an option. */
360 #define DWARF2_DEBUGGING_INFO
361 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
363 #define DEBUG_FRAME_SECTION "__DWARFA,__debug_frame,coalesced,no_toc+strip_static_syms"
364 #define DEBUG_INFO_SECTION "__DWARFA,__debug_info"
365 #define DEBUG_ABBREV_SECTION "__DWARFA,__debug_abbrev"
366 #define DEBUG_ARANGES_SECTION "__DWARFA,__debug_aranges"
367 #define DEBUG_MACINFO_SECTION "__DWARFA,__debug_macinfo"
368 #define DEBUG_LINE_SECTION "__DWARFA,__debug_line"
369 #define DEBUG_LOC_SECTION "__DWARFA,__debug_loc"
370 #define DEBUG_PUBNAMES_SECTION "__DWARFA,__debug_pubnames"
371 #define DEBUG_STR_SECTION "__DWARFA,__debug_str"
372 #define DEBUG_RANGES_SECTION "__DWARFA,__debug_ranges"
374 /* When generating stabs debugging, use N_BINCL entries. */
376 #define DBX_USE_BINCL
378 /* There is no limit to the length of stabs strings. */
380 #define DBX_CONTIN_LENGTH 0
382 /* gdb needs a null N_SO at the end of each file for scattered loading. */
384 #define DBX_OUTPUT_NULL_N_SO_AT_MAIN_SOURCE_FILE_END
386 /* GCC's definition of 'one_only' is the same as its definition of 'weak'. */
387 #define MAKE_DECL_ONE_ONLY(DECL) (DECL_WEAK (DECL) = 1)
389 /* Mach-O supports 'weak imports', and 'weak definitions' in coalesced
390 sections. machopic_select_section ensures that weak variables go in
391 coalesced sections. Weak aliases (or any other kind of aliases) are
392 not supported. Weak symbols that aren't visible outside the .s file
393 are not supported. */
394 #define ASM_WEAKEN_DECL(FILE, DECL, NAME, ALIAS) \
398 warning (0, "alias definitions not supported in Mach-O; ignored"); \
402 if (! DECL_EXTERNAL (DECL) && TREE_PUBLIC (DECL)) \
403 targetm.asm_out.globalize_label (FILE, NAME); \
404 if (DECL_EXTERNAL (DECL)) \
405 fputs ("\t.weak_reference ", FILE); \
406 else if (! lookup_attribute ("weak", DECL_ATTRIBUTES (DECL)) \
407 && lookup_attribute ("weak_import", DECL_ATTRIBUTES (DECL))) \
409 else if (TREE_PUBLIC (DECL)) \
410 fputs ("\t.weak_definition ", FILE); \
413 assemble_name (FILE, NAME); \
414 fputc ('\n', FILE); \
417 /* Darwin has the pthread routines in libSystem, which every program
418 links to, so there's no need for weak-ness for that. */
419 #define GTHREAD_USE_WEAK 0
421 /* The Darwin linker imposes two limitations on common symbols: they
422 can't have hidden visibility, and they can't appear in dylibs. As
423 a consequence, we should never use common symbols to represent
425 #undef USE_COMMON_FOR_ONE_ONLY
426 #define USE_COMMON_FOR_ONE_ONLY 0
428 /* The Darwin linker doesn't want coalesced symbols to appear in
429 a static archive's table of contents. */
430 #undef TARGET_WEAK_NOT_IN_ARCHIVE_TOC
431 #define TARGET_WEAK_NOT_IN_ARCHIVE_TOC 1
433 /* On Darwin, we don't (at the time of writing) have linkonce sections
434 with names, so it's safe to make the class data not comdat. */
435 #define TARGET_CXX_CLASS_DATA_ALWAYS_COMDAT hook_bool_void_false
437 /* We make exception information linkonce. */
438 #undef TARGET_USES_WEAK_UNWIND_INFO
439 #define TARGET_USES_WEAK_UNWIND_INFO 1
441 /* We need to use a nonlocal label for the start of an EH frame: the
442 Darwin linker requires that a coalesced section start with a label. */
443 #undef FRAME_BEGIN_LABEL
444 #define FRAME_BEGIN_LABEL "EH_frame"
446 /* Emit a label for the FDE corresponding to DECL. EMPTY means
447 emit a label for an empty FDE. */
448 #define TARGET_ASM_EMIT_UNWIND_LABEL darwin_emit_unwind_label
450 /* Emit a label to separate the exception table. */
451 #define TARGET_ASM_EMIT_EXCEPT_TABLE_LABEL darwin_emit_except_table_label
453 /* Our profiling scheme doesn't LP labels and counter words. */
455 #define NO_PROFILE_COUNTERS 1
457 #undef INIT_SECTION_ASM_OP
458 #define INIT_SECTION_ASM_OP
462 #define TARGET_ASM_CONSTRUCTOR machopic_asm_out_constructor
463 #define TARGET_ASM_DESTRUCTOR machopic_asm_out_destructor
465 /* Always prefix with an underscore. */
467 #define USER_LABEL_PREFIX "_"
469 /* Don't output a .file directive. That is only used by the assembler for
471 #undef TARGET_ASM_FILE_START_FILE_DIRECTIVE
472 #define TARGET_ASM_FILE_START_FILE_DIRECTIVE false
474 #undef TARGET_ASM_FILE_END
475 #define TARGET_ASM_FILE_END darwin_file_end
477 #define ASM_OUTPUT_SKIP(FILE,SIZE) \
478 fprintf (FILE, "\t.space "HOST_WIDE_INT_PRINT_UNSIGNED"\n", SIZE)
480 /* Give ObjC methods pretty symbol names. */
482 #undef OBJC_GEN_METHOD_LABEL
483 #define OBJC_GEN_METHOD_LABEL(BUF,IS_INST,CLASS_NAME,CAT_NAME,SEL_NAME,NUM) \
485 sprintf (BUF, "%c[%s(%s) %s]", (IS_INST) ? '-' : '+', \
486 (CLASS_NAME), (CAT_NAME), (SEL_NAME)); \
488 sprintf (BUF, "%c[%s %s]", (IS_INST) ? '-' : '+', \
489 (CLASS_NAME), (SEL_NAME)); \
492 /* The RTTI data (e.g., __ti4name) is common and public (and static),
493 but it does need to be referenced via indirect PIC data pointers.
494 The machopic_define_symbol calls are telling the machopic subsystem
495 that the name *is* defined in this module, so it doesn't need to
496 make them indirect. */
498 #undef ASM_DECLARE_OBJECT_NAME
499 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL) \
501 const char *xname = NAME; \
502 if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF) \
503 xname = IDENTIFIER_POINTER (DECL_NAME (DECL)); \
504 if (! DECL_WEAK (DECL) \
505 && ((TREE_STATIC (DECL) \
506 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
507 || DECL_INITIAL (DECL))) \
508 machopic_define_symbol (DECL_RTL (DECL)); \
509 if ((TREE_STATIC (DECL) \
510 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
511 || DECL_INITIAL (DECL)) \
512 (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false); \
513 ASM_OUTPUT_LABEL (FILE, xname); \
514 /* Darwin doesn't support zero-size objects, so give them a \
516 if (tree_low_cst (DECL_SIZE_UNIT (DECL), 1) == 0) \
517 assemble_zeros (1); \
520 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
522 const char *xname = NAME; \
523 if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF) \
524 xname = IDENTIFIER_POINTER (DECL_NAME (DECL)); \
525 if (! DECL_WEAK (DECL) \
526 && ((TREE_STATIC (DECL) \
527 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
528 || DECL_INITIAL (DECL))) \
529 machopic_define_symbol (DECL_RTL (DECL)); \
530 if ((TREE_STATIC (DECL) \
531 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
532 || DECL_INITIAL (DECL)) \
533 (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false); \
534 ASM_OUTPUT_LABEL (FILE, xname); \
537 #define ASM_DECLARE_CONSTANT_NAME(FILE, NAME, EXP, SIZE) \
539 ASM_OUTPUT_LABEL (FILE, NAME); \
540 /* Darwin doesn't support zero-size objects, so give them a \
543 assemble_zeros (1); \
546 /* Wrap new method names in quotes so the assembler doesn't gag.
547 Make Objective-C internal symbols local. */
549 #undef ASM_OUTPUT_LABELREF
550 #define ASM_OUTPUT_LABELREF(FILE,NAME) \
552 const char *xname = (NAME); \
553 if (! strcmp (xname, "<pic base>")) \
554 machopic_output_function_base_name(FILE); \
555 else if (xname[0] == '&' || xname[0] == '*') \
557 int len = strlen (xname); \
558 if (len > 6 && !strcmp ("$stub", xname + len - 5)) \
559 machopic_validate_stub_or_non_lazy_ptr (xname); \
560 else if (len > 7 && !strcmp ("$stub\"", xname + len - 6)) \
561 machopic_validate_stub_or_non_lazy_ptr (xname); \
562 else if (len > 14 && !strcmp ("$non_lazy_ptr", xname + len - 13)) \
563 machopic_validate_stub_or_non_lazy_ptr (xname); \
564 else if (len > 15 && !strcmp ("$non_lazy_ptr\"", xname + len - 14)) \
565 machopic_validate_stub_or_non_lazy_ptr (xname); \
566 if (xname[1] != '"' && name_needs_quotes (&xname[1])) \
567 fprintf (FILE, "\"%s\"", &xname[1]); \
569 fputs (&xname[1], FILE); \
571 else if (xname[0] == '+' || xname[0] == '-') \
572 fprintf (FILE, "\"%s\"", xname); \
573 else if (!strncmp (xname, "_OBJC_", 6)) \
574 fprintf (FILE, "L%s", xname); \
575 else if (!strncmp (xname, ".objc_class_name_", 17)) \
576 fprintf (FILE, "%s", xname); \
577 else if (xname[0] != '"' && name_needs_quotes (xname)) \
578 fprintf (FILE, "\"%s\"", xname); \
580 asm_fprintf (FILE, "%U%s", xname); \
583 /* Output before executable code. */
584 #undef TEXT_SECTION_ASM_OP
585 #define TEXT_SECTION_ASM_OP "\t.text"
587 /* Output before writable data. */
589 #undef DATA_SECTION_ASM_OP
590 #define DATA_SECTION_ASM_OP "\t.data"
593 #define ALIGN_ASM_OP ".align"
595 #undef ASM_OUTPUT_ALIGN
596 #define ASM_OUTPUT_ALIGN(FILE,LOG) \
598 fprintf (FILE, "\t%s %d\n", ALIGN_ASM_OP, (LOG))
600 /* Ensure correct alignment of bss data. */
602 #undef ASM_OUTPUT_ALIGNED_DECL_LOCAL
603 #define ASM_OUTPUT_ALIGNED_DECL_LOCAL(FILE, DECL, NAME, SIZE, ALIGN) \
605 unsigned HOST_WIDE_INT _new_size = SIZE; \
606 fputs (".lcomm ", (FILE)); \
607 assemble_name ((FILE), (NAME)); \
608 if (_new_size == 0) _new_size = 1; \
609 fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED",%u\n", _new_size, \
610 floor_log2 ((ALIGN) / BITS_PER_UNIT)); \
611 if ((DECL) && ((TREE_STATIC (DECL) \
612 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
613 || DECL_INITIAL (DECL))) \
615 (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false); \
616 machopic_define_symbol (DECL_RTL (DECL)); \
620 /* The maximum alignment which the object file format can support.
621 For Mach-O, this is 2^15. */
623 #undef MAX_OFILE_ALIGNMENT
624 #define MAX_OFILE_ALIGNMENT 0x8000
626 /* Declare the section variables. */
627 #ifndef USED_FOR_TARGET
628 enum darwin_section_enum {
629 #define DEF_SECTION(NAME, FLAGS, DIRECTIVE, OBJC) NAME,
630 #include "darwin-sections.def"
634 extern GTY(()) section * darwin_sections[NUM_DARWIN_SECTIONS];
637 #undef TARGET_ASM_SELECT_SECTION
638 #define TARGET_ASM_SELECT_SECTION machopic_select_section
639 #define USE_SELECT_SECTION_FOR_FUNCTIONS
641 #undef TARGET_ASM_SELECT_RTX_SECTION
642 #define TARGET_ASM_SELECT_RTX_SECTION machopic_select_rtx_section
643 #undef TARGET_ASM_UNIQUE_SECTION
644 #define TARGET_ASM_UNIQUE_SECTION darwin_unique_section
645 #undef TARGET_ASM_FUNCTION_RODATA_SECTION
646 #define TARGET_ASM_FUNCTION_RODATA_SECTION default_no_function_rodata_section
649 #define ASM_DECLARE_UNRESOLVED_REFERENCE(FILE,NAME) \
652 if (MACHOPIC_INDIRECT) \
653 fprintf (FILE, "\t.lazy_reference "); \
655 fprintf (FILE, "\t.reference "); \
656 assemble_name (FILE, NAME); \
657 fprintf (FILE, "\n"); \
661 #define ASM_DECLARE_CLASS_REFERENCE(FILE,NAME) \
664 fprintf (FILE, "\t"); \
665 assemble_name (FILE, NAME); \
666 fprintf (FILE, "=0\n"); \
667 (*targetm.asm_out.globalize_label) (FILE, NAME); \
671 /* Globalizing directive for a label. */
672 #define GLOBAL_ASM_OP ".globl "
673 #define TARGET_ASM_GLOBALIZE_LABEL darwin_globalize_label
675 /* Emit an assembler directive to set visibility for a symbol. Used
676 to support visibility attribute and Darwin's private extern
678 #undef TARGET_ASM_ASSEMBLE_VISIBILITY
679 #define TARGET_ASM_ASSEMBLE_VISIBILITY darwin_assemble_visibility
681 /* Extra attributes for Darwin. */
682 #define SUBTARGET_ATTRIBUTE_TABLE \
683 /* { name, min_len, max_len, decl_req, type_req, fn_type_req, handler } */ \
684 { "weak_import", 0, 0, true, false, false, \
685 darwin_handle_weak_import_attribute }
687 #undef ASM_GENERATE_INTERNAL_LABEL
688 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM) \
689 sprintf (LABEL, "*%s%ld", PREFIX, (long)(NUM))
691 #undef TARGET_ASM_MARK_DECL_PRESERVED
692 #define TARGET_ASM_MARK_DECL_PRESERVED darwin_mark_decl_preserved
694 /* Set on a symbol with SYMBOL_FLAG_FUNCTION or
695 MACHO_SYMBOL_FLAG_VARIABLE to indicate that the function or
696 variable has been defined in this translation unit. */
698 #define MACHO_SYMBOL_FLAG_VARIABLE (SYMBOL_FLAG_MACH_DEP)
699 #define MACHO_SYMBOL_FLAG_DEFINED ((SYMBOL_FLAG_MACH_DEP) << 1)
701 /* Set on a symbol to indicate when fix-and-continue style code
702 generation is being used and the symbol refers to a static symbol
703 that should be rebound from new instances of a translation unit to
704 the original instance of the data. */
706 #define MACHO_SYMBOL_STATIC ((SYMBOL_FLAG_MACH_DEP) << 2)
708 /* Symbolic names for various things we might know about a symbol. */
710 enum machopic_addr_class {
712 MACHOPIC_DEFINED_DATA,
713 MACHOPIC_UNDEFINED_DATA,
714 MACHOPIC_DEFINED_FUNCTION,
715 MACHOPIC_UNDEFINED_FUNCTION
718 /* Macros defining the various PIC cases. */
720 #define MACHO_DYNAMIC_NO_PIC_P (TARGET_DYNAMIC_NO_PIC)
721 #define MACHOPIC_INDIRECT (flag_pic || MACHO_DYNAMIC_NO_PIC_P)
722 #define MACHOPIC_JUST_INDIRECT (MACHO_DYNAMIC_NO_PIC_P)
723 #define MACHOPIC_PURE (flag_pic && ! MACHO_DYNAMIC_NO_PIC_P)
725 #undef TARGET_ENCODE_SECTION_INFO
726 #define TARGET_ENCODE_SECTION_INFO darwin_encode_section_info
727 #undef TARGET_STRIP_NAME_ENCODING
728 #define TARGET_STRIP_NAME_ENCODING default_strip_name_encoding
730 #define GEN_BINDER_NAME_FOR_STUB(BUF,STUB,STUB_LENGTH) \
732 const char *const stub_ = (STUB); \
733 char *buffer_ = (BUF); \
734 strcpy (buffer_, stub_); \
735 if (stub_[0] == '"') \
737 strcpy (buffer_ + (STUB_LENGTH) - 1, "_binder\""); \
741 strcpy (buffer_ + (STUB_LENGTH), "_binder"); \
745 #define GEN_SYMBOL_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH) \
747 const char *const symbol_ = (SYMBOL); \
748 char *buffer_ = (BUF); \
749 if (name_needs_quotes (symbol_) && symbol_[0] != '"') \
751 sprintf (buffer_, "\"%s\"", symbol_); \
755 strcpy (buffer_, symbol_); \
759 /* Given a symbol name string, create the lazy pointer version
760 of the symbol name. */
762 #define GEN_LAZY_PTR_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH) \
764 const char *symbol_ = (SYMBOL); \
765 char *buffer_ = (BUF); \
766 if (symbol_[0] == '"') \
768 strcpy (buffer_, "\"L"); \
769 strcpy (buffer_ + 2, symbol_ + 1); \
770 strcpy (buffer_ + (SYMBOL_LENGTH), "$lazy_ptr\""); \
772 else if (name_needs_quotes (symbol_)) \
774 strcpy (buffer_, "\"L"); \
775 strcpy (buffer_ + 2, symbol_); \
776 strcpy (buffer_ + (SYMBOL_LENGTH) + 2, "$lazy_ptr\""); \
780 strcpy (buffer_, "L"); \
781 strcpy (buffer_ + 1, symbol_); \
782 strcpy (buffer_ + (SYMBOL_LENGTH) + 1, "$lazy_ptr"); \
786 #define EH_FRAME_SECTION_NAME "__TEXT"
787 #define EH_FRAME_SECTION_ATTR ",coalesced,no_toc+strip_static_syms+live_support"
789 /* Java runtime class list. */
790 #define JCR_SECTION_NAME "__DATA,jcr,regular,no_dead_strip"
792 #undef ASM_PREFERRED_EH_DATA_FORMAT
793 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL) \
794 (((CODE) == 2 && (GLOBAL) == 1) \
795 ? (DW_EH_PE_pcrel | DW_EH_PE_indirect | DW_EH_PE_sdata4) : \
796 ((CODE) == 1 || (GLOBAL) == 0) ? DW_EH_PE_pcrel : DW_EH_PE_absptr)
798 #define ASM_OUTPUT_DWARF_DELTA(FILE,SIZE,LABEL1,LABEL2) \
799 darwin_asm_output_dwarf_delta (FILE, SIZE, LABEL1, LABEL2)
801 #define ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX(ASM_OUT_FILE, ENCODING, SIZE, ADDR, DONE) \
802 if (ENCODING == ASM_PREFERRED_EH_DATA_FORMAT (2, 1)) { \
803 darwin_non_lazy_pcrel (ASM_OUT_FILE, ADDR); \
807 #define TARGET_ASM_OUTPUT_ANCHOR darwin_asm_output_anchor
809 /* Experimentally, putting jump tables in text is faster on SPEC.
810 Also this is needed for correctness for coalesced functions. */
812 #ifndef JUMP_TABLES_IN_TEXT_SECTION
813 #define JUMP_TABLES_IN_TEXT_SECTION 1
816 #define TARGET_TERMINATE_DW2_EH_FRAME_INFO false
818 #define TARGET_ASM_INIT_SECTIONS darwin_init_sections
819 #undef TARGET_ASM_NAMED_SECTION
820 #define TARGET_ASM_NAMED_SECTION darwin_asm_named_section
822 #define DARWIN_REGISTER_TARGET_PRAGMAS() \
824 c_register_pragma (0, "mark", darwin_pragma_ignore); \
825 c_register_pragma (0, "options", darwin_pragma_options); \
826 c_register_pragma (0, "segment", darwin_pragma_ignore); \
827 c_register_pragma (0, "unused", darwin_pragma_unused); \
831 #define ASM_APP_ON ""
833 #define ASM_APP_OFF ""
835 void darwin_register_frameworks (const char *, const char *, int);
836 void darwin_register_objc_includes (const char *, const char *, int);
837 #define TARGET_EXTRA_PRE_INCLUDES darwin_register_objc_includes
838 #define TARGET_EXTRA_INCLUDES darwin_register_frameworks
840 void add_framework_path (char *);
841 #define TARGET_OPTF add_framework_path
843 #define TARGET_POSIX_IO
845 /* All new versions of Darwin have C99 functions. */
846 #define TARGET_C99_FUNCTIONS 1
848 #define WINT_TYPE "int"
850 /* Every program on darwin links against libSystem which contains the pthread
851 routines, so there's no need to explicitly call out when doing threaded
853 #undef GOMP_SELF_SPECS
854 #define GOMP_SELF_SPECS ""
856 #endif /* CONFIG_DARWIN_H */