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2006-03-15 Paul Brook <paul@codesourcery.com>
[official-gcc.git] / gcc / config / darwin.h
bloba2c276dd4da8ec9f812d44655d60f6a74a58df22
1 /* Target definitions for Darwin (Mac OS X) systems.
2 Copyright (C) 1989, 1990, 1991, 1992, 1993, 2000, 2001, 2002, 2003, 2004,
3 2005
4 Free Software Foundation, Inc.
5 Contributed by Apple Computer Inc.
6
7 This file is part of GCC.
8
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)
12 any later version.
13
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.
18
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. */
23
24 #ifndef CONFIG_DARWIN_H
25 #define CONFIG_DARWIN_H
26
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. */
33
34 /* Although NeXT ran on many different architectures, as of Jan 2001
35 the only supported Darwin targets are PowerPC and x86. */
36
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. */
40
41 #define OBJECT_FORMAT_MACHO
42
43 /* Suppress g++ attempt to link in the math library automatically. */
44 #define MATH_LIBRARY ""
45
46 /* We have atexit. */
47
48 #define HAVE_ATEXIT
49
50 /* Define an empty body for the function do_global_dtors() in libgcc2.c. */
51
52 #define DO_GLOBAL_DTORS_BODY
53
54 /* The string value for __SIZE_TYPE__. */
55
56 #ifndef SIZE_TYPE
57 #define SIZE_TYPE "long unsigned int"
58 #endif
59
60 /* Type used for ptrdiff_t, as a string used in a declaration. */
61
62 #undef PTRDIFF_TYPE
63 #define PTRDIFF_TYPE "int"
64
65 /* wchar_t is int. */
66
67 #undef WCHAR_TYPE
68 #define WCHAR_TYPE "int"
69 #undef WCHAR_TYPE_SIZE
70 #define WCHAR_TYPE_SIZE 32
71
72 /* Default to using the NeXT-style runtime, since that's what is
73 pre-installed on Darwin systems. */
74
75 #define NEXT_OBJC_RUNTIME
76
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. */
79
80 #undef DEFAULT_PCC_STRUCT_RETURN
81 #define DEFAULT_PCC_STRUCT_RETURN 0
82
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.
87
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.)
94
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.
99
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
103 architecture. */
104
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
142
143 /* These compiler options take n arguments. */
144
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 : \
186 0)
187
188 /* Machine dependent cpp options. Don't add more options here, add
189 them to darwin_cpp_builtins in darwin-c.c. */
190
191 #undef CPP_SPEC
192 #define CPP_SPEC "%{static:%{!dynamic:-D__STATIC__}}%{!static:-D__DYNAMIC__}"
193
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*} }}}}}}}}"
213
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. */
221 #define LINK_SPEC \
222 "%{static}%{!static:-dynamic} \
223 %{fgnu-runtime:%:replace-outfile(-lobjc -lobjc-gnu)}\
224 %{!Zdynamiclib: \
225 %{Zforce_cpusubtype_ALL:-arch %(darwin_arch) -force_cpusubtype_ALL} \
226 %{!Zforce_cpusubtype_ALL:-arch %(darwin_subarch)} \
227 %{Zbundle:-bundle} \
228 %{Zbundle_loader*:-bundle_loader %*} \
229 %{client_name*} \
230 %{compatibility_version*:%e-compatibility_version only allowed with -dynamiclib\
231 } \
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} \
236 %{private_bundle} \
237 } \
238 %{Zdynamiclib: \
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} \
250 } \
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 %*} \
263 %{Zinit*:-init %*} \
264 %{mmacosx-version-min=*:-macosx_version_min %*} \
265 %{nomultidefs} \
266 %{Zmulti_module:-multi_module} %{Zsingle_module:-single_module} \
267 %{Zmultiply_defined*:-multiply_defined %*} \
268 %{Zmultiplydefinedunused*:-multiply_defined_unused %*} \
269 %{prebind} %{noprebind} %{nofixprebinding} %{prebind_all_twolevel_modules} \
270 %{read_only_relocs} \
271 %{sectcreate*} %{sectorder*} %{seg1addr*} %{segprot*} \
272 %{Zsegaddr*:-segaddr %*} \
273 %{Zsegs_read_only_addr*:-segs_read_only_addr %*} \
274 %{Zsegs_read_write_addr*:-segs_read_write_addr %*} \
275 %{Zseg_addr_table*: -seg_addr_table %*} \
276 %{Zfn_seg_addr_table_filename*:-seg_addr_table_filename %*} \
277 %{sub_library*} %{sub_umbrella*} \
278 %{isysroot*:-syslibroot %*} \
279 %{twolevel_namespace} %{twolevel_namespace_hints} \
280 %{umbrella*} \
281 %{undefined*} \
282 %{Zunexported_symbols_list*:-unexported_symbols_list %*} \
283 %{Zweak_reference_mismatches*:-weak_reference_mismatches %*} \
284 %{!Zweak_reference_mismatches*:-weak_reference_mismatches non-weak} \
285 %{X} \
286 %{y*} \
287 %{w} \
288 %{pagezero_size*} %{segs_read_*} %{seglinkedit} %{noseglinkedit} \
289 %{sectalign*} %{sectobjectsymbols*} %{segcreate*} %{whyload} \
290 %{whatsloaded} %{dylinker_install_name*} \
291 %{dylinker} %{Mach} "
292
293
294 /* Machine dependent libraries. */
295
296 #define LIB_SPEC "%{!static:-lSystem}"
297
298 /* Support -mmacosx-version-min by supplying different (stub) libgcc_s.dylib
299 libraries to link against, and by not linking against libgcc_s on
300 earlier-than-10.3.9.
301
302 Note that by default, -lgcc_eh is not linked against! This is
303 because in a future version of Darwin the EH frame information may
304 be in a new format, or the fallback routine might be changed; if
305 you want to explicitly link against the static version of those
306 routines, because you know you don't need to unwind through system
307 libraries, you need to explicitly say -static-libgcc.
308
309 If it is linked against, it has to be before -lgcc, because it may
310 need symbols from -lgcc. */
311 #undef REAL_LIBGCC_SPEC
312 #define REAL_LIBGCC_SPEC \
313 "%{static-libgcc|static: -lgcc_eh -lgcc; \
314 shared-libgcc|fexceptions: \
315 %:version-compare(!> 10.5 mmacosx-version-min= -lgcc_s.10.4) \
316 %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_s.10.5) \
317 -lgcc; \
318 :%:version-compare(>< 10.3.9 10.5 mmacosx-version-min= -lgcc_s.10.4) \
319 %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_s.10.5) \
320 -lgcc}"
321
322 /* We specify crt0.o as -lcrt0.o so that ld will search the library path. */
323
324 #undef STARTFILE_SPEC
325 #define STARTFILE_SPEC \
326 "%{!Zdynamiclib:%{Zbundle:%{!static:-lbundle1.o}} \
327 %{!Zbundle:%{pg:%{static:-lgcrt0.o} \
328 %{!static:%{object:-lgcrt0.o} \
329 %{!object:%{preload:-lgcrt0.o} \
330 %{!preload:-lgcrt1.o %(darwin_crt2)}}}} \
331 %{!pg:%{static:-lcrt0.o} \
332 %{!static:%{object:-lcrt0.o} \
333 %{!object:%{preload:-lcrt0.o} \
334 %{!preload:-lcrt1.o %(darwin_crt2)}}}}}}"
335
336 /* The native Darwin linker doesn't necessarily place files in the order
337 that they're specified on the link line. Thus, it is pointless
338 to put anything in ENDFILE_SPEC. */
339 /* #define ENDFILE_SPEC "" */
340
341 /* Default Darwin ASM_SPEC, very simple. */
342 #define ASM_SPEC "-arch %(darwin_arch) \
343 %{Zforce_cpusubtype_ALL:-force_cpusubtype_ALL}"
344
345 /* We use Dbx symbol format. */
346
347 #define DBX_DEBUGGING_INFO 1
348
349 /* Also enable Dwarf 2 as an option. */
350 #define DWARF2_DEBUGGING_INFO
351 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
352
353 #define DEBUG_FRAME_SECTION "__DWARFA,__debug_frame,coalesced,no_toc+strip_static_syms"
354 #define DEBUG_INFO_SECTION "__DWARFA,__debug_info"
355 #define DEBUG_ABBREV_SECTION "__DWARFA,__debug_abbrev"
356 #define DEBUG_ARANGES_SECTION "__DWARFA,__debug_aranges"
357 #define DEBUG_MACINFO_SECTION "__DWARFA,__debug_macinfo"
358 #define DEBUG_LINE_SECTION "__DWARFA,__debug_line"
359 #define DEBUG_LOC_SECTION "__DWARFA,__debug_loc"
360 #define DEBUG_PUBNAMES_SECTION "__DWARFA,__debug_pubnames"
361 #define DEBUG_STR_SECTION "__DWARFA,__debug_str"
362 #define DEBUG_RANGES_SECTION "__DWARFA,__debug_ranges"
363
364 /* When generating stabs debugging, use N_BINCL entries. */
365
366 #define DBX_USE_BINCL
367
368 /* There is no limit to the length of stabs strings. */
369
370 #define DBX_CONTIN_LENGTH 0
371
372 /* gdb needs a null N_SO at the end of each file for scattered loading. */
373
374 #define DBX_OUTPUT_NULL_N_SO_AT_MAIN_SOURCE_FILE_END
375
376 /* GCC's definition of 'one_only' is the same as its definition of 'weak'. */
377 #define MAKE_DECL_ONE_ONLY(DECL) (DECL_WEAK (DECL) = 1)
378
379 /* Mach-O supports 'weak imports', and 'weak definitions' in coalesced
380 sections. machopic_select_section ensures that weak variables go in
381 coalesced sections. Weak aliases (or any other kind of aliases) are
382 not supported. Weak symbols that aren't visible outside the .s file
383 are not supported. */
384 #define ASM_WEAKEN_DECL(FILE, DECL, NAME, ALIAS) \
385 do { \
386 if (ALIAS) \
387 { \
388 warning (0, "alias definitions not supported in Mach-O; ignored"); \
389 break; \
390 } \
391 \
392 if (! DECL_EXTERNAL (DECL) && TREE_PUBLIC (DECL)) \
393 targetm.asm_out.globalize_label (FILE, NAME); \
394 if (DECL_EXTERNAL (DECL)) \
395 fputs ("\t.weak_reference ", FILE); \
396 else if (! lookup_attribute ("weak", DECL_ATTRIBUTES (DECL)) \
397 && lookup_attribute ("weak_import", DECL_ATTRIBUTES (DECL))) \
398 break; \
399 else if (TREE_PUBLIC (DECL)) \
400 fputs ("\t.weak_definition ", FILE); \
401 else \
402 break; \
403 assemble_name (FILE, NAME); \
404 fputc ('\n', FILE); \
405 } while (0)
406
407 /* Darwin has the pthread routines in libSystem, which every program
408 links to, so there's no need for weak-ness for that. */
409 #define GTHREAD_USE_WEAK 0
410
411 /* The Darwin linker imposes two limitations on common symbols: they
412 can't have hidden visibility, and they can't appear in dylibs. As
413 a consequence, we should never use common symbols to represent
414 vague linkage. */
415 #undef USE_COMMON_FOR_ONE_ONLY
416 #define USE_COMMON_FOR_ONE_ONLY 0
417
418 /* The Darwin linker doesn't want coalesced symbols to appear in
419 a static archive's table of contents. */
420 #undef TARGET_WEAK_NOT_IN_ARCHIVE_TOC
421 #define TARGET_WEAK_NOT_IN_ARCHIVE_TOC 1
422
423 /* On Darwin, we don't (at the time of writing) have linkonce sections
424 with names, so it's safe to make the class data not comdat. */
425 #define TARGET_CXX_CLASS_DATA_ALWAYS_COMDAT hook_bool_void_false
426
427 /* We make exception information linkonce. */
428 #undef TARGET_USES_WEAK_UNWIND_INFO
429 #define TARGET_USES_WEAK_UNWIND_INFO 1
430
431 /* We need to use a nonlocal label for the start of an EH frame: the
432 Darwin linker requires that a coalesced section start with a label. */
433 #undef FRAME_BEGIN_LABEL
434 #define FRAME_BEGIN_LABEL "EH_frame"
435
436 /* Emit a label for the FDE corresponding to DECL. EMPTY means
437 emit a label for an empty FDE. */
438 #define TARGET_ASM_EMIT_UNWIND_LABEL darwin_emit_unwind_label
439
440 /* Emit a label to separate the exception table. */
441 #define TARGET_ASM_EMIT_EXCEPT_TABLE_LABEL darwin_emit_except_table_label
442
443 /* Our profiling scheme doesn't LP labels and counter words. */
444
445 #define NO_PROFILE_COUNTERS 1
446
447 #undef INIT_SECTION_ASM_OP
448 #define INIT_SECTION_ASM_OP
449
450 #undef INVOKE__main
451
452 #define TARGET_ASM_CONSTRUCTOR machopic_asm_out_constructor
453 #define TARGET_ASM_DESTRUCTOR machopic_asm_out_destructor
454
455 /* Always prefix with an underscore. */
456
457 #define USER_LABEL_PREFIX "_"
458
459 /* Don't output a .file directive. That is only used by the assembler for
460 error reporting. */
461 #undef TARGET_ASM_FILE_START_FILE_DIRECTIVE
462 #define TARGET_ASM_FILE_START_FILE_DIRECTIVE false
463
464 #undef TARGET_ASM_FILE_END
465 #define TARGET_ASM_FILE_END darwin_file_end
466
467 #define ASM_OUTPUT_SKIP(FILE,SIZE) \
468 fprintf (FILE, "\t.space "HOST_WIDE_INT_PRINT_UNSIGNED"\n", SIZE)
469
470 /* Give ObjC methods pretty symbol names. */
471
472 #undef OBJC_GEN_METHOD_LABEL
473 #define OBJC_GEN_METHOD_LABEL(BUF,IS_INST,CLASS_NAME,CAT_NAME,SEL_NAME,NUM) \
474 do { if (CAT_NAME) \
475 sprintf (BUF, "%c[%s(%s) %s]", (IS_INST) ? '-' : '+', \
476 (CLASS_NAME), (CAT_NAME), (SEL_NAME)); \
477 else \
478 sprintf (BUF, "%c[%s %s]", (IS_INST) ? '-' : '+', \
479 (CLASS_NAME), (SEL_NAME)); \
480 } while (0)
481
482 /* The RTTI data (e.g., __ti4name) is common and public (and static),
483 but it does need to be referenced via indirect PIC data pointers.
484 The machopic_define_symbol calls are telling the machopic subsystem
485 that the name *is* defined in this module, so it doesn't need to
486 make them indirect. */
487
488 #undef ASM_DECLARE_OBJECT_NAME
489 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL) \
490 do { \
491 const char *xname = NAME; \
492 if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF) \
493 xname = IDENTIFIER_POINTER (DECL_NAME (DECL)); \
494 if (! DECL_WEAK (DECL) \
495 && ((TREE_STATIC (DECL) \
496 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
497 || DECL_INITIAL (DECL))) \
498 machopic_define_symbol (DECL_RTL (DECL)); \
499 if ((TREE_STATIC (DECL) \
500 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
501 || DECL_INITIAL (DECL)) \
502 (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false); \
503 ASM_OUTPUT_LABEL (FILE, xname); \
504 /* Darwin doesn't support zero-size objects, so give them a \
505 byte. */ \
506 if (tree_low_cst (DECL_SIZE_UNIT (DECL), 1) == 0) \
507 assemble_zeros (1); \
508 } while (0)
509
510 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
511 do { \
512 const char *xname = NAME; \
513 if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF) \
514 xname = IDENTIFIER_POINTER (DECL_NAME (DECL)); \
515 if (! DECL_WEAK (DECL) \
516 && ((TREE_STATIC (DECL) \
517 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
518 || DECL_INITIAL (DECL))) \
519 machopic_define_symbol (DECL_RTL (DECL)); \
520 if ((TREE_STATIC (DECL) \
521 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
522 || DECL_INITIAL (DECL)) \
523 (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false); \
524 ASM_OUTPUT_LABEL (FILE, xname); \
525 } while (0)
526
527 #define ASM_DECLARE_CONSTANT_NAME(FILE, NAME, EXP, SIZE) \
528 do { \
529 ASM_OUTPUT_LABEL (FILE, NAME); \
530 /* Darwin doesn't support zero-size objects, so give them a \
531 byte. */ \
532 if ((SIZE) == 0) \
533 assemble_zeros (1); \
534 } while (0)
535
536 /* Wrap new method names in quotes so the assembler doesn't gag.
537 Make Objective-C internal symbols local. */
538
539 #undef ASM_OUTPUT_LABELREF
540 #define ASM_OUTPUT_LABELREF(FILE,NAME) \
541 do { \
542 const char *xname = (NAME); \
543 if (! strcmp (xname, "<pic base>")) \
544 machopic_output_function_base_name(FILE); \
545 else if (xname[0] == '&' || xname[0] == '*') \
546 { \
547 int len = strlen (xname); \
548 if (len > 6 && !strcmp ("$stub", xname + len - 5)) \
549 machopic_validate_stub_or_non_lazy_ptr (xname); \
550 else if (len > 7 && !strcmp ("$stub\"", xname + len - 6)) \
551 machopic_validate_stub_or_non_lazy_ptr (xname); \
552 else if (len > 14 && !strcmp ("$non_lazy_ptr", xname + len - 13)) \
553 machopic_validate_stub_or_non_lazy_ptr (xname); \
554 else if (len > 15 && !strcmp ("$non_lazy_ptr\"", xname + len - 14)) \
555 machopic_validate_stub_or_non_lazy_ptr (xname); \
556 if (xname[1] != '"' && name_needs_quotes (&xname[1])) \
557 fprintf (FILE, "\"%s\"", &xname[1]); \
558 else \
559 fputs (&xname[1], FILE); \
560 } \
561 else if (xname[0] == '+' || xname[0] == '-') \
562 fprintf (FILE, "\"%s\"", xname); \
563 else if (!strncmp (xname, "_OBJC_", 6)) \
564 fprintf (FILE, "L%s", xname); \
565 else if (!strncmp (xname, ".objc_class_name_", 17)) \
566 fprintf (FILE, "%s", xname); \
567 else if (xname[0] != '"' && name_needs_quotes (xname)) \
568 fprintf (FILE, "\"%s\"", xname); \
569 else \
570 asm_fprintf (FILE, "%U%s", xname); \
571 } while (0)
572
573 /* Output before executable code. */
574 #undef TEXT_SECTION_ASM_OP
575 #define TEXT_SECTION_ASM_OP "\t.text"
576
577 /* Output before writable data. */
578
579 #undef DATA_SECTION_ASM_OP
580 #define DATA_SECTION_ASM_OP "\t.data"
581
582 #undef ALIGN_ASM_OP
583 #define ALIGN_ASM_OP ".align"
584
585 #undef ASM_OUTPUT_ALIGN
586 #define ASM_OUTPUT_ALIGN(FILE,LOG) \
587 if ((LOG) != 0) \
588 fprintf (FILE, "\t%s %d\n", ALIGN_ASM_OP, (LOG))
589
590 /* Ensure correct alignment of bss data. */
591
592 #undef ASM_OUTPUT_ALIGNED_DECL_LOCAL
593 #define ASM_OUTPUT_ALIGNED_DECL_LOCAL(FILE, DECL, NAME, SIZE, ALIGN) \
594 do { \
595 unsigned HOST_WIDE_INT _new_size = SIZE; \
596 fputs (".lcomm ", (FILE)); \
597 assemble_name ((FILE), (NAME)); \
598 if (_new_size == 0) _new_size = 1; \
599 fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED",%u\n", _new_size, \
600 floor_log2 ((ALIGN) / BITS_PER_UNIT)); \
601 if ((DECL) && ((TREE_STATIC (DECL) \
602 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
603 || DECL_INITIAL (DECL))) \
604 { \
605 (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false); \
606 machopic_define_symbol (DECL_RTL (DECL)); \
607 } \
608 } while (0)
609
610 /* The maximum alignment which the object file format can support.
611 For Mach-O, this is 2^15. */
612
613 #undef MAX_OFILE_ALIGNMENT
614 #define MAX_OFILE_ALIGNMENT 0x8000
615
616 /* Declare the section variables. */
617 #ifndef USED_FOR_TARGET
618 enum darwin_section_enum {
619 #define DEF_SECTION(NAME, FLAGS, DIRECTIVE, OBJC) NAME,
620 #include "darwin-sections.def"
621 #undef DEF_SECTION
622 NUM_DARWIN_SECTIONS
623 };
624 extern GTY(()) section * darwin_sections[NUM_DARWIN_SECTIONS];
625 #endif
626
627 #undef TARGET_ASM_SELECT_SECTION
628 #define TARGET_ASM_SELECT_SECTION machopic_select_section
629 #define USE_SELECT_SECTION_FOR_FUNCTIONS
630
631 #undef TARGET_ASM_SELECT_RTX_SECTION
632 #define TARGET_ASM_SELECT_RTX_SECTION machopic_select_rtx_section
633 #undef TARGET_ASM_UNIQUE_SECTION
634 #define TARGET_ASM_UNIQUE_SECTION darwin_unique_section
635 #undef TARGET_ASM_FUNCTION_RODATA_SECTION
636 #define TARGET_ASM_FUNCTION_RODATA_SECTION default_no_function_rodata_section
637
638
639 #define ASM_DECLARE_UNRESOLVED_REFERENCE(FILE,NAME) \
640 do { \
641 if (FILE) { \
642 if (MACHOPIC_INDIRECT) \
643 fprintf (FILE, "\t.lazy_reference "); \
644 else \
645 fprintf (FILE, "\t.reference "); \
646 assemble_name (FILE, NAME); \
647 fprintf (FILE, "\n"); \
648 } \
649 } while (0)
650
651 #define ASM_DECLARE_CLASS_REFERENCE(FILE,NAME) \
652 do { \
653 if (FILE) { \
654 fprintf (FILE, "\t"); \
655 assemble_name (FILE, NAME); \
656 fprintf (FILE, "=0\n"); \
657 (*targetm.asm_out.globalize_label) (FILE, NAME); \
658 } \
659 } while (0)
660
661 /* Globalizing directive for a label. */
662 #define GLOBAL_ASM_OP ".globl "
663 #define TARGET_ASM_GLOBALIZE_LABEL darwin_globalize_label
664
665 /* Emit an assembler directive to set visibility for a symbol. Used
666 to support visibility attribute and Darwin's private extern
667 feature. */
668 #undef TARGET_ASM_ASSEMBLE_VISIBILITY
669 #define TARGET_ASM_ASSEMBLE_VISIBILITY darwin_assemble_visibility
670
671 /* Extra attributes for Darwin. */
672 #define SUBTARGET_ATTRIBUTE_TABLE \
673 /* { name, min_len, max_len, decl_req, type_req, fn_type_req, handler } */ \
674 { "weak_import", 0, 0, true, false, false, \
675 darwin_handle_weak_import_attribute }
676
677 #undef ASM_GENERATE_INTERNAL_LABEL
678 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM) \
679 sprintf (LABEL, "*%s%ld", PREFIX, (long)(NUM))
680
681 #undef TARGET_ASM_MARK_DECL_PRESERVED
682 #define TARGET_ASM_MARK_DECL_PRESERVED darwin_mark_decl_preserved
683
684 /* Set on a symbol with SYMBOL_FLAG_FUNCTION or
685 MACHO_SYMBOL_FLAG_VARIABLE to indicate that the function or
686 variable has been defined in this translation unit. */
687
688 #define MACHO_SYMBOL_FLAG_VARIABLE (SYMBOL_FLAG_MACH_DEP)
689 #define MACHO_SYMBOL_FLAG_DEFINED ((SYMBOL_FLAG_MACH_DEP) << 1)
690
691 /* Set on a symbol to indicate when fix-and-continue style code
692 generation is being used and the symbol refers to a static symbol
693 that should be rebound from new instances of a translation unit to
694 the original instance of the data. */
695
696 #define MACHO_SYMBOL_STATIC ((SYMBOL_FLAG_MACH_DEP) << 2)
697
698 /* Symbolic names for various things we might know about a symbol. */
699
700 enum machopic_addr_class {
701 MACHOPIC_UNDEFINED,
702 MACHOPIC_DEFINED_DATA,
703 MACHOPIC_UNDEFINED_DATA,
704 MACHOPIC_DEFINED_FUNCTION,
705 MACHOPIC_UNDEFINED_FUNCTION
706 };
707
708 /* Macros defining the various PIC cases. */
709
710 #define MACHO_DYNAMIC_NO_PIC_P (TARGET_DYNAMIC_NO_PIC)
711 #define MACHOPIC_INDIRECT (flag_pic || MACHO_DYNAMIC_NO_PIC_P)
712 #define MACHOPIC_JUST_INDIRECT (MACHO_DYNAMIC_NO_PIC_P)
713 #define MACHOPIC_PURE (flag_pic && ! MACHO_DYNAMIC_NO_PIC_P)
714
715 #undef TARGET_ENCODE_SECTION_INFO
716 #define TARGET_ENCODE_SECTION_INFO darwin_encode_section_info
717 #undef TARGET_STRIP_NAME_ENCODING
718 #define TARGET_STRIP_NAME_ENCODING default_strip_name_encoding
719
720 #define GEN_BINDER_NAME_FOR_STUB(BUF,STUB,STUB_LENGTH) \
721 do { \
722 const char *const stub_ = (STUB); \
723 char *buffer_ = (BUF); \
724 strcpy (buffer_, stub_); \
725 if (stub_[0] == '"') \
726 { \
727 strcpy (buffer_ + (STUB_LENGTH) - 1, "_binder\""); \
728 } \
729 else \
730 { \
731 strcpy (buffer_ + (STUB_LENGTH), "_binder"); \
732 } \
733 } while (0)
734
735 #define GEN_SYMBOL_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH) \
736 do { \
737 const char *const symbol_ = (SYMBOL); \
738 char *buffer_ = (BUF); \
739 if (name_needs_quotes (symbol_) && symbol_[0] != '"') \
740 { \
741 sprintf (buffer_, "\"%s\"", symbol_); \
742 } \
743 else \
744 { \
745 strcpy (buffer_, symbol_); \
746 } \
747 } while (0)
748
749 /* Given a symbol name string, create the lazy pointer version
750 of the symbol name. */
751
752 #define GEN_LAZY_PTR_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH) \
753 do { \
754 const char *symbol_ = (SYMBOL); \
755 char *buffer_ = (BUF); \
756 if (symbol_[0] == '"') \
757 { \
758 strcpy (buffer_, "\"L"); \
759 strcpy (buffer_ + 2, symbol_ + 1); \
760 strcpy (buffer_ + (SYMBOL_LENGTH), "$lazy_ptr\""); \
761 } \
762 else if (name_needs_quotes (symbol_)) \
763 { \
764 strcpy (buffer_, "\"L"); \
765 strcpy (buffer_ + 2, symbol_); \
766 strcpy (buffer_ + (SYMBOL_LENGTH) + 2, "$lazy_ptr\""); \
767 } \
768 else \
769 { \
770 strcpy (buffer_, "L"); \
771 strcpy (buffer_ + 1, symbol_); \
772 strcpy (buffer_ + (SYMBOL_LENGTH) + 1, "$lazy_ptr"); \
773 } \
774 } while (0)
775
776 #define EH_FRAME_SECTION_NAME "__TEXT"
777 #define EH_FRAME_SECTION_ATTR ",coalesced,no_toc+strip_static_syms+live_support"
778
779 /* Java runtime class list. */
780 #define JCR_SECTION_NAME "__DATA,jcr,regular,no_dead_strip"
781
782 #undef ASM_PREFERRED_EH_DATA_FORMAT
783 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL) \
784 (((CODE) == 2 && (GLOBAL) == 1) \
785 ? (DW_EH_PE_pcrel | DW_EH_PE_indirect | DW_EH_PE_sdata4) : \
786 ((CODE) == 1 || (GLOBAL) == 0) ? DW_EH_PE_pcrel : DW_EH_PE_absptr)
787
788 #define ASM_OUTPUT_DWARF_DELTA(FILE,SIZE,LABEL1,LABEL2) \
789 darwin_asm_output_dwarf_delta (FILE, SIZE, LABEL1, LABEL2)
790
791 #define ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX(ASM_OUT_FILE, ENCODING, SIZE, ADDR, DONE) \
792 if (ENCODING == ASM_PREFERRED_EH_DATA_FORMAT (2, 1)) { \
793 darwin_non_lazy_pcrel (ASM_OUT_FILE, ADDR); \
794 goto DONE; \
795 }
796
797 #define TARGET_ASM_OUTPUT_ANCHOR darwin_asm_output_anchor
798
799 /* Experimentally, putting jump tables in text is faster on SPEC.
800 Also this is needed for correctness for coalesced functions. */
801
802 #ifndef JUMP_TABLES_IN_TEXT_SECTION
803 #define JUMP_TABLES_IN_TEXT_SECTION 1
804 #endif
805
806 #define TARGET_TERMINATE_DW2_EH_FRAME_INFO false
807
808 #define TARGET_ASM_INIT_SECTIONS darwin_init_sections
809 #undef TARGET_ASM_NAMED_SECTION
810 #define TARGET_ASM_NAMED_SECTION darwin_asm_named_section
811
812 #define DARWIN_REGISTER_TARGET_PRAGMAS() \
813 do { \
814 c_register_pragma (0, "mark", darwin_pragma_ignore); \
815 c_register_pragma (0, "options", darwin_pragma_options); \
816 c_register_pragma (0, "segment", darwin_pragma_ignore); \
817 c_register_pragma (0, "unused", darwin_pragma_unused); \
818 } while (0)
819
820 #undef ASM_APP_ON
821 #define ASM_APP_ON ""
822 #undef ASM_APP_OFF
823 #define ASM_APP_OFF ""
824
825 void darwin_register_frameworks (const char *, const char *, int);
826 void darwin_register_objc_includes (const char *, const char *, int);
827 #define TARGET_EXTRA_PRE_INCLUDES darwin_register_objc_includes
828 #define TARGET_EXTRA_INCLUDES darwin_register_frameworks
829
830 void add_framework_path (char *);
831 #define TARGET_OPTF add_framework_path
832
833 #define TARGET_POSIX_IO
834
835 /* All new versions of Darwin have C99 functions. */
836 #define TARGET_C99_FUNCTIONS 1
837
838 #define WINT_TYPE "int"
839
840 /* Every program on darwin links against libSystem which contains the pthread
841 routines, so there's no need to explicitly call out when doing threaded
842 work. */
843 #undef GOMP_SELF_SPECS
844 #define GOMP_SELF_SPECS ""
845
846 #endif /* CONFIG_DARWIN_H */
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