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* c-common.c (handle_used_attribute): Set DECL_PRESERVE_P.
[official-gcc.git] / gcc / config / darwin.h
blob311c16114592de609f3c84bdd486fd52c07a5325
1 /* Target definitions for Darwin (Mac OS X) systems.
2 Copyright (C) 1989, 1990, 1991, 1992, 1993, 2000, 2001, 2002, 2003, 2004
3 Free Software Foundation, Inc.
4 Contributed by Apple Computer Inc.
5
6 This file is part of GCC.
7
8 GCC is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
11 any later version.
12
13 GCC is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING. If not, write to
20 the Free Software Foundation, 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
22
23 #ifndef CONFIG_DARWIN_H
24 #define CONFIG_DARWIN_H
25
26 /* The definitions in this file are common to all processor types
27 running Darwin, which is the kernel for Mac OS X. Darwin is
28 basically a BSD user layer laid over a Mach kernel, then evolved
29 for many years (at NeXT) in parallel with other Unix systems. So
30 while the runtime is a somewhat idiosyncratic Mach-based thing,
31 other definitions look like they would for a BSD variant. */
32
33 /* Although NeXT ran on many different architectures, as of Jan 2001
34 the only supported Darwin targets are PowerPC and x86. */
35
36 /* One of Darwin's NeXT legacies is the Mach-O format, which is partly
37 like a.out and partly like COFF, with additional features like
38 multi-architecture binary support. */
39
40 #define OBJECT_FORMAT_MACHO
41
42 /* Suppress g++ attempt to link in the math library automatically. */
43 #define MATH_LIBRARY ""
44
45 /* We have atexit. */
46
47 #define HAVE_ATEXIT
48
49 /* Define an empty body for the function do_global_dtors() in libgcc2.c. */
50
51 #define DO_GLOBAL_DTORS_BODY
52
53 /* The string value for __SIZE_TYPE__. */
54
55 #ifndef SIZE_TYPE
56 #define SIZE_TYPE "long unsigned int"
57 #endif
58
59 /* Type used for ptrdiff_t, as a string used in a declaration. */
60
61 #undef PTRDIFF_TYPE
62 #define PTRDIFF_TYPE "int"
63
64 /* wchar_t is int. */
65
66 #undef WCHAR_TYPE
67 #define WCHAR_TYPE "int"
68 #undef WCHAR_TYPE_SIZE
69 #define WCHAR_TYPE_SIZE 32
70
71 /* Default to using the NeXT-style runtime, since that's what is
72 pre-installed on Darwin systems. */
73
74 #define NEXT_OBJC_RUNTIME
75
76 /* Don't default to pcc-struct-return, because gcc is the only compiler, and
77 we want to retain compatibility with older gcc versions. */
78
79 #undef DEFAULT_PCC_STRUCT_RETURN
80 #define DEFAULT_PCC_STRUCT_RETURN 0
81
82 /* This table intercepts weirdo options whose names would interfere
83 with normal driver conventions, and either translates them into
84 standardly-named options, or adds a 'Z' so that they can get to
85 specs processing without interference.
86
87 Do not expand a linker option to "-Xlinker -<option>", since that
88 forfeits the ability to control via spec strings later. However,
89 as a special exception, do this translation with -filelist, because
90 otherwise the driver will think there are no input files and quit.
91 (The alternative would be to hack the driver to recognize -filelist
92 specially, but it's simpler to use the translation table.)
93
94 Note that an option name with a prefix that matches another option
95 name, that also takes an argument, needs to be modified so the
96 prefix is different, otherwise a '*' after the shorter option will
97 match with the longer one.
98
99 The SUBTARGET_OPTION_TRANSLATE_TABLE macro, which _must_ be defined
100 in gcc/config/{i386,rs6000}/darwin.h, should contain any additional
101 command-line option translations specific to the particular target
102 architecture. */
103
104 #define TARGET_OPTION_TRANSLATE_TABLE \
105 { "-all_load", "-Zall_load" }, \
106 { "-allowable_client", "-Zallowable_client" }, \
107 { "-arch_errors_fatal", "-Zarch_errors_fatal" }, \
108 { "-bind_at_load", "-Zbind_at_load" }, \
109 { "-bundle", "-Zbundle" }, \
110 { "-bundle_loader", "-Zbundle_loader" }, \
111 { "-weak_reference_mismatches", "-Zweak_reference_mismatches" }, \
112 { "-dead_strip", "-Zdead_strip" }, \
113 { "-no_dead_strip_inits_and_terms", "-Zno_dead_strip_inits_and_terms" }, \
114 { "-dependency-file", "-MF" }, \
115 { "-dylib_file", "-Zdylib_file" }, \
116 { "-dynamic", "-Zdynamic" }, \
117 { "-dynamiclib", "-Zdynamiclib" }, \
118 { "-exported_symbols_list", "-Zexported_symbols_list" }, \
119 { "-seg_addr_table_filename", "-Zseg_addr_table_filename" }, \
120 { "-filelist", "-Xlinker -filelist -Xlinker" }, \
121 { "-framework", "-Xlinker -framework -Xlinker" }, \
122 { "-flat_namespace", "-Zflat_namespace" }, \
123 { "-force_cpusubtype_ALL", "-Zforce_cpusubtype_ALL" }, \
124 { "-force_flat_namespace", "-Zforce_flat_namespace" }, \
125 { "-image_base", "-Zimage_base" }, \
126 { "-init", "-Zinit" }, \
127 { "-install_name", "-Zinstall_name" }, \
128 { "-multiply_defined_unused", "-Zmultiplydefinedunused" }, \
129 { "-multiply_defined", "-Zmultiply_defined" }, \
130 { "-multi_module", "-Zmulti_module" }, \
131 { "-static", "-static -Wa,-static" }, \
132 { "-single_module", "-Zsingle_module" }, \
133 { "-unexported_symbols_list", "-Zunexported_symbols_list" }, \
134 SUBTARGET_OPTION_TRANSLATE_TABLE
135
136 /* Nonzero if the user has chosen to force sizeof(bool) to be 1
137 by providing the -mone-byte-bool switch. It would be better
138 to use SUBTARGET_SWITCHES for this instead of SUBTARGET_OPTIONS,
139 but there are no more bits in rs6000 TARGET_SWITCHES. Note
140 that this switch has no "no-" variant. */
141 extern const char *darwin_one_byte_bool;
142
143 #undef SUBTARGET_OPTIONS
144 #define SUBTARGET_OPTIONS \
145 {"one-byte-bool", &darwin_one_byte_bool, N_("Set sizeof(bool) to 1"), 0 }
146
147 /* These compiler options take n arguments. */
148
149 #undef WORD_SWITCH_TAKES_ARG
150 #define WORD_SWITCH_TAKES_ARG(STR) \
151 (DEFAULT_WORD_SWITCH_TAKES_ARG (STR) ? 1 : \
152 !strcmp (STR, "Zallowable_client") ? 1 : \
153 !strcmp (STR, "arch") ? 1 : \
154 !strcmp (STR, "arch_only") ? 1 : \
155 !strcmp (STR, "Zbundle_loader") ? 1 : \
156 !strcmp (STR, "client_name") ? 1 : \
157 !strcmp (STR, "compatibility_version") ? 1 : \
158 !strcmp (STR, "current_version") ? 1 : \
159 !strcmp (STR, "Zdylib_file") ? 1 : \
160 !strcmp (STR, "Zexported_symbols_list") ? 1 : \
161 !strcmp (STR, "Zimage_base") ? 1 : \
162 !strcmp (STR, "Zinit") ? 1 : \
163 !strcmp (STR, "Zinstall_name") ? 1 : \
164 !strcmp (STR, "Zmultiplydefinedunused") ? 1 : \
165 !strcmp (STR, "Zmultiply_defined") ? 1 : \
166 !strcmp (STR, "precomp-trustfile") ? 1 : \
167 !strcmp (STR, "read_only_relocs") ? 1 : \
168 !strcmp (STR, "sectcreate") ? 3 : \
169 !strcmp (STR, "sectorder") ? 3 : \
170 !strcmp (STR, "Zseg_addr_table_filename") ?1 :\
171 !strcmp (STR, "seg1addr") ? 1 : \
172 !strcmp (STR, "segprot") ? 3 : \
173 !strcmp (STR, "seg_addr_table") ? 1 : \
174 !strcmp (STR, "sub_library") ? 1 : \
175 !strcmp (STR, "sub_umbrella") ? 1 : \
176 !strcmp (STR, "umbrella") ? 1 : \
177 !strcmp (STR, "undefined") ? 1 : \
178 !strcmp (STR, "Zunexported_symbols_list") ? 1 : \
179 !strcmp (STR, "Zweak_reference_mismatches") ? 1 : \
180 !strcmp (STR, "pagezero_size") ? 1 : \
181 !strcmp (STR, "segs_read_only_addr") ? 1 : \
182 !strcmp (STR, "segs_read_write_addr") ? 1 : \
183 !strcmp (STR, "sectalign") ? 3 : \
184 !strcmp (STR, "sectobjectsymbols") ? 2 : \
185 !strcmp (STR, "segcreate") ? 3 : \
186 !strcmp (STR, "dylinker_install_name") ? 1 : \
187 0)
188
189 /* Machine dependent cpp options. __APPLE_CC__ is defined as the
190 Apple include files expect it to be defined and won't work if it
191 isn't. */
192
193 #undef CPP_SPEC
194 #define CPP_SPEC "%{static:%{!dynamic:-D__STATIC__}}%{!static:-D__DYNAMIC__}\
195 -D__APPLE_CC__=1"
196
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 %{!Zdynamiclib:-arch %(darwin_arch)} \
209 %{Zdynamiclib:-arch_only %(darwin_arch)} \
210 %l %X %{d} %{s} %{t} %{Z} \
211 %{!Zdynamiclib:%{A} %{e*} %{m} %{N} %{n} %{r} %{u*} %{x} %{z}} \
212 %{@:-o %f%u.out}%{!@:%{o*}%{!o:-o a.out}} \
213 %{!Zdynamiclib:%{!A:%{!nostdlib:%{!nostartfiles:%S}}}} \
214 %{L*} %(link_libgcc) %o %{fprofile-arcs|fprofile-generate:-lgcov} \
215 %{!nostdlib:%{!nodefaultlibs:%G %L}} \
216 %{!A:%{!nostdlib:%{!nostartfiles:%E}}} %{T*} %{F*} }}}}}}}}"
217
218 /* Please keep the random linker options in alphabetical order (modulo
219 'Z' and 'no' prefixes). Options that can only go to one of libtool
220 or ld must be listed twice, under both !Zdynamiclib and
221 Zdynamiclib, with one of the cases reporting an error. */
222 /* Note that options taking arguments may appear multiple times on a
223 command line with different arguments each time, so put a * after
224 their names so all of them get passed. */
225 #define LINK_SPEC \
226 "%{static}%{!static:-dynamic} \
227 %{!Zdynamiclib: \
228 %{Zbundle:-bundle} \
229 %{Zbundle_loader*:-bundle_loader %*} \
230 %{client_name*} \
231 %{compatibility_version*:%e-compatibility_version only allowed with -dynamiclib\
232 } \
233 %{current_version*:%e-current_version only allowed with -dynamiclib} \
234 %{Zforce_cpusubtype_ALL:-force_cpusubtype_ALL} \
235 %{Zforce_flat_namespace:-force_flat_namespace} \
236 %{Zinstall_name*:%e-install_name only allowed with -dynamiclib} \
237 %{keep_private_externs} \
238 %{private_bundle} \
239 } \
240 %{Zdynamiclib: \
241 %{Zbundle:%e-bundle not allowed with -dynamiclib} \
242 %{Zbundle_loader*:%e-bundle_loader not allowed with -dynamiclib} \
243 %{client_name*:%e-client_name not allowed with -dynamiclib} \
244 %{compatibility_version*} \
245 %{current_version*} \
246 %{Zforce_cpusubtype_ALL:%e-force_cpusubtype_ALL not allowed with -dynamiclib} \
247 %{Zforce_flat_namespace:%e-force_flat_namespace not allowed with -dynamiclib} \
248 %{Zinstall_name*:-install_name %*} \
249 %{keep_private_externs:%e-keep_private_externs not allowed with -dynamiclib} \
250 %{private_bundle:%e-private_bundle not allowed with -dynamiclib} \
251 } \
252 %{Zall_load:-all_load}%{Zdynamiclib:%{!Zall_load:-noall_load}} \
253 %{Zallowable_client*:-allowable_client %*} \
254 %{Zbind_at_load:-bind_at_load} \
255 %{Zarch_errors_fatal:-arch_errors_fatal} \
256 %{Zdead_strip:-dead_strip} \
257 %{Zno_dead_strip_inits_and_terms:-no_dead_strip_inits_and_terms} \
258 %{Zdylib_file*:-dylib_file %*} \
259 %{Zdynamic:-dynamic}\
260 %{Zexported_symbols_list*:-exported_symbols_list %*} \
261 %{Zflat_namespace:-flat_namespace} \
262 %{headerpad_max_install_names*} \
263 %{Zimage_base*:-image_base %*} \
264 %{Zinit*:-init %*} \
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*} %{seg_addr_table*} \
272 %{Zseg_addr_table_filename*:-seg_addr_table_filename %*} \
273 %{sub_library*} %{sub_umbrella*} \
274 %{twolevel_namespace} %{twolevel_namespace_hints} \
275 %{umbrella*} \
276 %{undefined*} \
277 %{Zunexported_symbols_list*:-unexported_symbols_list %*} \
278 %{Zweak_reference_mismatches*:-weak_reference_mismatches %*} \
279 %{X} \
280 %{y*} \
281 %{w} \
282 %{pagezero_size*} %{segs_read_*} %{seglinkedit} %{noseglinkedit} \
283 %{sectalign*} %{sectobjectsymbols*} %{segcreate*} %{whyload} \
284 %{whatsloaded} %{dylinker_install_name*} \
285 %{dylinker} %{Mach} "
286
287
288 /* Machine dependent libraries but do not redefine it if we already on 7.0 and
289 above as it needs to link with libmx also. */
290
291 #ifndef LIB_SPEC
292 #define LIB_SPEC "%{!static:-lSystem}"
293 #endif
294
295 /* We specify crt0.o as -lcrt0.o so that ld will search the library path. */
296
297 #undef STARTFILE_SPEC
298 #define STARTFILE_SPEC \
299 "%{!Zdynamiclib:%{Zbundle:%{!static:-lbundle1.o}} \
300 %{!Zbundle:%{pg:%{static:-lgcrt0.o} \
301 %{!static:%{object:-lgcrt0.o} \
302 %{!object:%{preload:-lgcrt0.o} \
303 %{!preload:-lgcrt1.o crt2.o%s}}}} \
304 %{!pg:%{static:-lcrt0.o} \
305 %{!static:%{object:-lcrt0.o} \
306 %{!object:%{preload:-lcrt0.o} \
307 %{!preload:-lcrt1.o crt2.o%s}}}}}}"
308
309 /* The native Darwin linker doesn't necessarily place files in the order
310 that they're specified on the link line. Thus, it is pointless
311 to put anything in ENDFILE_SPEC. */
312 /* #define ENDFILE_SPEC "" */
313
314 /* We use Dbx symbol format. */
315
316 #define DBX_DEBUGGING_INFO 1
317
318 /* Also enable Dwarf 2 as an option. */
319 #define DWARF2_DEBUGGING_INFO
320 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
321
322 #define DEBUG_FRAME_SECTION "__DWARFA,__debug_frame,coalesced,no_toc+strip_static_syms"
323 #define DEBUG_INFO_SECTION "__DWARFA,__debug_info"
324 #define DEBUG_ABBREV_SECTION "__DWARFA,__debug_abbrev"
325 #define DEBUG_ARANGES_SECTION "__DWARFA,__debug_aranges"
326 #define DEBUG_MACINFO_SECTION "__DWARFA,__debug_macinfo"
327 #define DEBUG_LINE_SECTION "__DWARFA,__debug_line"
328 #define DEBUG_LOC_SECTION "__DWARFA,__debug_loc"
329 #define DEBUG_PUBNAMES_SECTION "__DWARFA,__debug_pubnames"
330 #define DEBUG_STR_SECTION "__DWARFA,__debug_str"
331 #define DEBUG_RANGES_SECTION "__DWARFA,__debug_ranges"
332
333 /* When generating stabs debugging, use N_BINCL entries. */
334
335 #define DBX_USE_BINCL
336
337 /* There is no limit to the length of stabs strings. */
338
339 #define DBX_CONTIN_LENGTH 0
340
341 /* gdb needs a null N_SO at the end of each file for scattered loading. */
342
343 #undef DBX_OUTPUT_MAIN_SOURCE_FILE_END
344 #define DBX_OUTPUT_MAIN_SOURCE_FILE_END(FILE, FILENAME) \
345 do { text_section (); \
346 fprintf (FILE, \
347 "\t.stabs \"%s\",%d,0,0,Letext\nLetext:\n", "" , N_SO); \
348 } while (0)
349
350 /* Making a symbols weak on Darwin requires more than just setting DECL_WEAK. */
351 #define MAKE_DECL_ONE_ONLY(DECL) darwin_make_decl_one_only (DECL)
352
353 /* Representation of linkonce symbols for the MACH-O assembler. Linkonce
354 symbols must be given a special section *and* must be preceded by a
355 special assembler directive. */
356 #define ASM_MAKE_LABEL_LINKONCE(FILE, NAME) \
357 do { const char* _x = (NAME); if (!!strncmp (_x, "_OBJC_", 6)) { \
358 fputs (".weak_definition ", FILE); assemble_name (FILE, _x); \
359 fputs ("\n", FILE); }} while (0)
360
361 /* We support hidden visibility */
362 #undef TARGET_SUPPORTS_HIDDEN
363 #define TARGET_SUPPORTS_HIDDEN 1
364
365 /* The Darwin linker imposes two limitations on common symbols: they
366 can't have hidden visibility, and they can't appear in dylibs. As
367 a consequence, we should never use common symbols to represent
368 vague linkage. */
369 #undef USE_COMMON_FOR_ONE_ONLY
370 #define USE_COMMON_FOR_ONE_ONLY 0
371
372 /* The Darwin linker doesn't want coalesced symbols to appear in
373 a static archive's table of contents. */
374 #undef TARGET_WEAK_NOT_IN_ARCHIVE_TOC
375 #define TARGET_WEAK_NOT_IN_ARCHIVE_TOC 1
376
377 /* We make exception information linkonce. */
378 #undef TARGET_USES_WEAK_UNWIND_INFO
379 #define TARGET_USES_WEAK_UNWIND_INFO 1
380
381 /* We need to use a nonlocal label for the start of an EH frame: the
382 Darwin linker requires that a coalesced section start with a label. */
383 #undef FRAME_BEGIN_LABEL
384 #define FRAME_BEGIN_LABEL "EH_frame"
385
386 /* Emit a label for the FDE corresponding to DECL. EMPTY means
387 emit a label for an empty FDE. */
388 #define TARGET_ASM_EMIT_UNWIND_LABEL darwin_emit_unwind_label
389
390 /* Our profiling scheme doesn't LP labels and counter words. */
391
392 #define NO_PROFILE_COUNTERS 1
393
394 #undef INIT_SECTION_ASM_OP
395 #define INIT_SECTION_ASM_OP
396
397 #undef INVOKE__main
398
399 #define TARGET_ASM_CONSTRUCTOR machopic_asm_out_constructor
400 #define TARGET_ASM_DESTRUCTOR machopic_asm_out_destructor
401
402 /* Always prefix with an underscore. */
403
404 #define USER_LABEL_PREFIX "_"
405
406 /* Don't output a .file directive. That is only used by the assembler for
407 error reporting. */
408 #undef TARGET_ASM_FILE_START_FILE_DIRECTIVE
409 #define TARGET_ASM_FILE_START_FILE_DIRECTIVE false
410
411 #undef TARGET_ASM_FILE_END
412 #define TARGET_ASM_FILE_END darwin_file_end
413
414 #define ASM_OUTPUT_SKIP(FILE,SIZE) \
415 fprintf (FILE, "\t.space "HOST_WIDE_INT_PRINT_UNSIGNED"\n", SIZE)
416
417 /* Give ObjC methods pretty symbol names. */
418
419 #undef OBJC_GEN_METHOD_LABEL
420 #define OBJC_GEN_METHOD_LABEL(BUF,IS_INST,CLASS_NAME,CAT_NAME,SEL_NAME,NUM) \
421 do { if (CAT_NAME) \
422 sprintf (BUF, "%c[%s(%s) %s]", (IS_INST) ? '-' : '+', \
423 (CLASS_NAME), (CAT_NAME), (SEL_NAME)); \
424 else \
425 sprintf (BUF, "%c[%s %s]", (IS_INST) ? '-' : '+', \
426 (CLASS_NAME), (SEL_NAME)); \
427 } while (0)
428
429 /* The RTTI data (e.g., __ti4name) is common and public (and static),
430 but it does need to be referenced via indirect PIC data pointers.
431 The machopic_define_symbol calls are telling the machopic subsystem
432 that the name *is* defined in this module, so it doesn't need to
433 make them indirect. */
434
435 #undef ASM_DECLARE_OBJECT_NAME
436 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL) \
437 do { \
438 const char *xname = NAME; \
439 if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF) \
440 xname = IDENTIFIER_POINTER (DECL_NAME (DECL)); \
441 if (! DECL_ONE_ONLY (DECL) && ! DECL_WEAK (DECL)) \
442 if ((TREE_STATIC (DECL) \
443 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
444 || DECL_INITIAL (DECL)) \
445 machopic_define_symbol (DECL_RTL (DECL)); \
446 if ((TREE_STATIC (DECL) \
447 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
448 || DECL_INITIAL (DECL)) \
449 (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false); \
450 ASM_OUTPUT_LABEL (FILE, xname); \
451 /* Darwin doesn't support zero-size objects, so give them a \
452 byte. */ \
453 if (tree_low_cst (DECL_SIZE_UNIT (DECL), 1) == 0) \
454 assemble_zeros (1); \
455 } while (0)
456
457 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
458 do { \
459 const char *xname = NAME; \
460 if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF) \
461 xname = IDENTIFIER_POINTER (DECL_NAME (DECL)); \
462 if (! DECL_ONE_ONLY (DECL) && ! DECL_WEAK (DECL)) \
463 if ((TREE_STATIC (DECL) \
464 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
465 || DECL_INITIAL (DECL)) \
466 machopic_define_symbol (DECL_RTL (DECL)); \
467 if ((TREE_STATIC (DECL) \
468 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
469 || DECL_INITIAL (DECL)) \
470 (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false); \
471 ASM_OUTPUT_LABEL (FILE, xname); \
472 } while (0)
473
474 #define ASM_DECLARE_CONSTANT_NAME(FILE, NAME, EXP, SIZE) \
475 do { \
476 ASM_OUTPUT_LABEL (FILE, NAME); \
477 /* Darwin doesn't support zero-size objects, so give them a \
478 byte. */ \
479 if ((SIZE) == 0) \
480 assemble_zeros (1); \
481 } while (0)
482
483 /* Wrap new method names in quotes so the assembler doesn't gag.
484 Make Objective-C internal symbols local. */
485
486 #undef ASM_OUTPUT_LABELREF
487 #define ASM_OUTPUT_LABELREF(FILE,NAME) \
488 do { \
489 const char *xname = (NAME); \
490 if (! strcmp (xname, "<pic base>")) \
491 machopic_output_function_base_name(FILE); \
492 else if (xname[0] == '&' || xname[0] == '*') \
493 { \
494 int len = strlen (xname); \
495 if (len > 6 && !strcmp ("$stub", xname + len - 5)) \
496 machopic_validate_stub_or_non_lazy_ptr (xname); \
497 else if (len > 7 && !strcmp ("$stub\"", xname + len - 6)) \
498 machopic_validate_stub_or_non_lazy_ptr (xname); \
499 else if (len > 14 && !strcmp ("$non_lazy_ptr", xname + len - 13)) \
500 machopic_validate_stub_or_non_lazy_ptr (xname); \
501 fputs (&xname[1], FILE); \
502 } \
503 else if (xname[0] == '+' || xname[0] == '-') \
504 fprintf (FILE, "\"%s\"", xname); \
505 else if (!strncmp (xname, "_OBJC_", 6)) \
506 fprintf (FILE, "L%s", xname); \
507 else if (!strncmp (xname, ".objc_class_name_", 17)) \
508 fprintf (FILE, "%s", xname); \
509 else \
510 asm_fprintf (FILE, "%U%s", xname); \
511 } while (0)
512
513 /* Output before executable code. */
514 #undef TEXT_SECTION_ASM_OP
515 #define TEXT_SECTION_ASM_OP ".text"
516
517 /* Output before writable data. */
518
519 #undef DATA_SECTION_ASM_OP
520 #define DATA_SECTION_ASM_OP ".data"
521
522 #undef ALIGN_ASM_OP
523 #define ALIGN_ASM_OP ".align"
524
525 #undef ASM_OUTPUT_ALIGN
526 #define ASM_OUTPUT_ALIGN(FILE,LOG) \
527 if ((LOG) != 0) \
528 fprintf (FILE, "\t%s %d\n", ALIGN_ASM_OP, (LOG))
529
530 /* Ensure correct alignment of bss data. */
531
532 #undef ASM_OUTPUT_ALIGNED_DECL_LOCAL
533 #define ASM_OUTPUT_ALIGNED_DECL_LOCAL(FILE, DECL, NAME, SIZE, ALIGN) \
534 do { \
535 fputs (".lcomm ", (FILE)); \
536 assemble_name ((FILE), (NAME)); \
537 fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED",%u\n", (SIZE), \
538 floor_log2 ((ALIGN) / BITS_PER_UNIT)); \
539 if ((DECL) && ((TREE_STATIC (DECL) \
540 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
541 || DECL_INITIAL (DECL))) \
542 { \
543 (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false); \
544 machopic_define_symbol (DECL_RTL (DECL)); \
545 } \
546 } while (0)
547
548 /* The maximum alignment which the object file format can support.
549 For Mach-O, this is 2^15. */
550
551 #undef MAX_OFILE_ALIGNMENT
552 #define MAX_OFILE_ALIGNMENT 0x8000
553
554 /* Create new Mach-O sections. */
555
556 #undef SECTION_FUNCTION
557 #define SECTION_FUNCTION(FUNCTION, SECTION, DIRECTIVE, OBJC) \
558 extern void FUNCTION (void); \
559 void \
560 FUNCTION (void) \
561 { \
562 if (in_section != SECTION) \
563 { \
564 if (OBJC) \
565 objc_section_init (); \
566 data_section (); \
567 if (asm_out_file) \
568 fprintf (asm_out_file, "%s\n", DIRECTIVE); \
569 in_section = SECTION; \
570 } \
571 } \
572
573 /* Darwin uses many types of special sections. */
574
575 #undef EXTRA_SECTIONS
576 #define EXTRA_SECTIONS \
577 in_const, in_const_data, in_cstring, in_literal4, in_literal8, \
578 in_constructor, in_destructor, in_mod_init, in_mod_term, \
579 in_objc_class, in_objc_meta_class, in_objc_category, \
580 in_objc_class_vars, in_objc_instance_vars, \
581 in_objc_cls_meth, in_objc_inst_meth, \
582 in_objc_cat_cls_meth, in_objc_cat_inst_meth, \
583 in_objc_selector_refs, \
584 in_objc_selector_fixup, \
585 in_objc_symbols, in_objc_module_info, \
586 in_objc_protocol, in_objc_string_object, \
587 in_objc_constant_string_object, \
588 in_objc_image_info, \
589 in_objc_class_names, in_objc_meth_var_names, \
590 in_objc_meth_var_types, in_objc_cls_refs, \
591 in_machopic_nl_symbol_ptr, \
592 in_machopic_lazy_symbol_ptr, \
593 in_machopic_symbol_stub, \
594 in_machopic_symbol_stub1, \
595 in_machopic_picsymbol_stub, \
596 in_machopic_picsymbol_stub1, \
597 in_darwin_exception, in_darwin_eh_frame, \
598 num_sections
599
600 #undef EXTRA_SECTION_FUNCTIONS
601 #define EXTRA_SECTION_FUNCTIONS \
602 static void objc_section_init (void); \
603 SECTION_FUNCTION (const_section, \
604 in_const, \
605 ".const", 0) \
606 SECTION_FUNCTION (const_data_section, \
607 in_const_data, \
608 ".const_data", 0) \
609 SECTION_FUNCTION (cstring_section, \
610 in_cstring, \
611 ".cstring", 0) \
612 SECTION_FUNCTION (literal4_section, \
613 in_literal4, \
614 ".literal4", 0) \
615 SECTION_FUNCTION (literal8_section, \
616 in_literal8, \
617 ".literal8", 0) \
618 SECTION_FUNCTION (constructor_section, \
619 in_constructor, \
620 ".constructor", 0) \
621 SECTION_FUNCTION (mod_init_section, \
622 in_mod_init, \
623 ".mod_init_func", 0) \
624 SECTION_FUNCTION (mod_term_section, \
625 in_mod_term, \
626 ".mod_term_func", 0) \
627 SECTION_FUNCTION (destructor_section, \
628 in_destructor, \
629 ".destructor", 0) \
630 SECTION_FUNCTION (objc_class_section, \
631 in_objc_class, \
632 ".objc_class", 1) \
633 SECTION_FUNCTION (objc_meta_class_section, \
634 in_objc_meta_class, \
635 ".objc_meta_class", 1) \
636 SECTION_FUNCTION (objc_category_section, \
637 in_objc_category, \
638 ".objc_category", 1) \
639 SECTION_FUNCTION (objc_class_vars_section, \
640 in_objc_class_vars, \
641 ".objc_class_vars", 1) \
642 SECTION_FUNCTION (objc_instance_vars_section, \
643 in_objc_instance_vars, \
644 ".objc_instance_vars", 1) \
645 SECTION_FUNCTION (objc_cls_meth_section, \
646 in_objc_cls_meth, \
647 ".objc_cls_meth", 1) \
648 SECTION_FUNCTION (objc_inst_meth_section, \
649 in_objc_inst_meth, \
650 ".objc_inst_meth", 1) \
651 SECTION_FUNCTION (objc_cat_cls_meth_section, \
652 in_objc_cat_cls_meth, \
653 ".objc_cat_cls_meth", 1) \
654 SECTION_FUNCTION (objc_cat_inst_meth_section, \
655 in_objc_cat_inst_meth, \
656 ".objc_cat_inst_meth", 1) \
657 SECTION_FUNCTION (objc_selector_refs_section, \
658 in_objc_selector_refs, \
659 ".objc_message_refs", 1) \
660 SECTION_FUNCTION (objc_selector_fixup_section, \
661 in_objc_selector_fixup, \
662 ".section __OBJC, __sel_fixup, regular, no_dead_strip", 1) \
663 SECTION_FUNCTION (objc_symbols_section, \
664 in_objc_symbols, \
665 ".objc_symbols", 1) \
666 SECTION_FUNCTION (objc_module_info_section, \
667 in_objc_module_info, \
668 ".objc_module_info", 1) \
669 SECTION_FUNCTION (objc_protocol_section, \
670 in_objc_protocol, \
671 ".objc_protocol", 1) \
672 SECTION_FUNCTION (objc_string_object_section, \
673 in_objc_string_object, \
674 ".objc_string_object", 1) \
675 SECTION_FUNCTION (objc_constant_string_object_section, \
676 in_objc_constant_string_object, \
677 ".section __OBJC, __cstring_object, regular, no_dead_strip", 1) \
678 /* Fix-and-Continue image marker. */ \
679 SECTION_FUNCTION (objc_image_info_section, \
680 in_objc_image_info, \
681 ".section __OBJC, __image_info, regular, no_dead_strip", 1) \
682 SECTION_FUNCTION (objc_class_names_section, \
683 in_objc_class_names, \
684 ".objc_class_names", 1) \
685 SECTION_FUNCTION (objc_meth_var_names_section, \
686 in_objc_meth_var_names, \
687 ".objc_meth_var_names", 1) \
688 SECTION_FUNCTION (objc_meth_var_types_section, \
689 in_objc_meth_var_types, \
690 ".objc_meth_var_types", 1) \
691 SECTION_FUNCTION (objc_cls_refs_section, \
692 in_objc_cls_refs, \
693 ".objc_cls_refs", 1) \
694 \
695 SECTION_FUNCTION (machopic_lazy_symbol_ptr_section, \
696 in_machopic_lazy_symbol_ptr, \
697 ".lazy_symbol_pointer", 0) \
698 SECTION_FUNCTION (machopic_nl_symbol_ptr_section, \
699 in_machopic_nl_symbol_ptr, \
700 ".non_lazy_symbol_pointer", 0) \
701 SECTION_FUNCTION (machopic_symbol_stub_section, \
702 in_machopic_symbol_stub, \
703 ".symbol_stub", 0) \
704 SECTION_FUNCTION (machopic_symbol_stub1_section, \
705 in_machopic_symbol_stub1, \
706 ".section __TEXT,__symbol_stub1,symbol_stubs,pure_instructions,16", 0)\
707 SECTION_FUNCTION (machopic_picsymbol_stub_section, \
708 in_machopic_picsymbol_stub, \
709 ".picsymbol_stub", 0) \
710 SECTION_FUNCTION (machopic_picsymbol_stub1_section, \
711 in_machopic_picsymbol_stub1, \
712 ".section __TEXT,__picsymbolstub1,symbol_stubs,pure_instructions,32", 0)\
713 SECTION_FUNCTION (darwin_exception_section, \
714 in_darwin_exception, \
715 ".section __DATA,__gcc_except_tab", 0) \
716 SECTION_FUNCTION (darwin_eh_frame_section, \
717 in_darwin_eh_frame, \
718 ".section " EH_FRAME_SECTION_NAME ",__eh_frame" EH_FRAME_SECTION_ATTR, 0) \
719 \
720 static void \
721 objc_section_init (void) \
722 { \
723 static int been_here = 0; \
724 \
725 if (been_here == 0) \
726 { \
727 been_here = 1; \
728 /* written, cold -> hot */ \
729 objc_cat_cls_meth_section (); \
730 objc_cat_inst_meth_section (); \
731 objc_string_object_section (); \
732 objc_constant_string_object_section (); \
733 objc_selector_refs_section (); \
734 objc_selector_fixup_section (); \
735 objc_cls_refs_section (); \
736 objc_class_section (); \
737 objc_meta_class_section (); \
738 /* shared, hot -> cold */ \
739 objc_cls_meth_section (); \
740 objc_inst_meth_section (); \
741 objc_protocol_section (); \
742 objc_class_names_section (); \
743 objc_meth_var_types_section (); \
744 objc_meth_var_names_section (); \
745 objc_category_section (); \
746 objc_class_vars_section (); \
747 objc_instance_vars_section (); \
748 objc_module_info_section (); \
749 objc_symbols_section (); \
750 } \
751 }
752
753 #define READONLY_DATA_SECTION const_section
754
755 #undef TARGET_ASM_SELECT_SECTION
756 #define TARGET_ASM_SELECT_SECTION machopic_select_section
757 #undef TARGET_ASM_SELECT_RTX_SECTION
758 #define TARGET_ASM_SELECT_RTX_SECTION machopic_select_rtx_section
759 #undef TARGET_ASM_UNIQUE_SECTION
760 #define TARGET_ASM_UNIQUE_SECTION darwin_unique_section
761 #undef TARGET_ASM_FUNCTION_RODATA_SECTION
762 #define TARGET_ASM_FUNCTION_RODATA_SECTION default_no_function_rodata_section
763
764
765 #define ASM_DECLARE_UNRESOLVED_REFERENCE(FILE,NAME) \
766 do { \
767 if (FILE) { \
768 if (MACHOPIC_INDIRECT) \
769 fprintf (FILE, "\t.lazy_reference "); \
770 else \
771 fprintf (FILE, "\t.reference "); \
772 assemble_name (FILE, NAME); \
773 fprintf (FILE, "\n"); \
774 } \
775 } while (0)
776
777 #define ASM_DECLARE_CLASS_REFERENCE(FILE,NAME) \
778 do { \
779 if (FILE) { \
780 fprintf (FILE, "\t"); \
781 assemble_name (FILE, NAME); \
782 fprintf (FILE, "=0\n"); \
783 (*targetm.asm_out.globalize_label) (FILE, NAME); \
784 } \
785 } while (0)
786
787 /* Globalizing directive for a label. */
788 #define GLOBAL_ASM_OP ".globl "
789 #define TARGET_ASM_GLOBALIZE_LABEL darwin_globalize_label
790
791 /* Emit an assembler directive to set visibility for a symbol. Used
792 to support visibility attribute and Darwin's private extern
793 feature. */
794 #undef TARGET_ASM_ASSEMBLE_VISIBILITY
795 #define TARGET_ASM_ASSEMBLE_VISIBILITY darwin_assemble_visibility
796
797
798 #undef ASM_GENERATE_INTERNAL_LABEL
799 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM) \
800 sprintf (LABEL, "*%s%ld", PREFIX, (long)(NUM))
801
802 #undef TARGET_ASM_MARK_DECL_PRESERVED
803 #define TARGET_ASM_MARK_DECL_PRESERVED darwin_mark_decl_preserved
804
805 /* Since we have a separate readonly data section, define this so that
806 jump tables end up in text rather than data. */
807
808 #ifndef JUMP_TABLES_IN_TEXT_SECTION
809 #define JUMP_TABLES_IN_TEXT_SECTION 1
810 #endif
811
812 /* Set on a symbol with SYMBOL_FLAG_FUNCTION or
813 MACHO_SYMBOL_FLAG_VARIABLE to indicate that the function or
814 variable has been defined in this translation unit. */
815 #define MACHO_SYMBOL_FLAG_VARIABLE (SYMBOL_FLAG_MACH_DEP)
816 #define MACHO_SYMBOL_FLAG_DEFINED ((SYMBOL_FLAG_MACH_DEP) << 1)
817
818 /* Symbolic names for various things we might know about a symbol. */
819
820 enum machopic_addr_class {
821 MACHOPIC_UNDEFINED,
822 MACHOPIC_DEFINED_DATA,
823 MACHOPIC_UNDEFINED_DATA,
824 MACHOPIC_DEFINED_FUNCTION,
825 MACHOPIC_UNDEFINED_FUNCTION
826 };
827
828 /* Macros defining the various PIC cases. */
829
830 #define MACHO_DYNAMIC_NO_PIC_P (TARGET_DYNAMIC_NO_PIC)
831 #define MACHOPIC_INDIRECT (flag_pic || MACHO_DYNAMIC_NO_PIC_P)
832 #define MACHOPIC_JUST_INDIRECT (flag_pic == 1 || MACHO_DYNAMIC_NO_PIC_P)
833 #define MACHOPIC_PURE (flag_pic == 2 && ! MACHO_DYNAMIC_NO_PIC_P)
834
835 #undef TARGET_ENCODE_SECTION_INFO
836 #define TARGET_ENCODE_SECTION_INFO darwin_encode_section_info
837 #undef TARGET_STRIP_NAME_ENCODING
838 #define TARGET_STRIP_NAME_ENCODING default_strip_name_encoding
839
840 #define GEN_BINDER_NAME_FOR_STUB(BUF,STUB,STUB_LENGTH) \
841 do { \
842 const char *const stub_ = (STUB); \
843 char *buffer_ = (BUF); \
844 strcpy (buffer_, stub_); \
845 if (stub_[0] == '"') \
846 { \
847 strcpy (buffer_ + (STUB_LENGTH) - 1, "_binder\""); \
848 } \
849 else \
850 { \
851 strcpy (buffer_ + (STUB_LENGTH), "_binder"); \
852 } \
853 } while (0)
854
855 #define GEN_SYMBOL_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH) \
856 do { \
857 const char *const symbol_ = (SYMBOL); \
858 char *buffer_ = (BUF); \
859 if (name_needs_quotes (symbol_) && symbol_[0] != '"') \
860 { \
861 sprintf (buffer_, "\"%s\"", symbol_); \
862 } \
863 else \
864 { \
865 strcpy (buffer_, symbol_); \
866 } \
867 } while (0)
868
869 /* Given a symbol name string, create the lazy pointer version
870 of the symbol name. */
871
872 #define GEN_LAZY_PTR_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH) \
873 do { \
874 const char *symbol_ = (SYMBOL); \
875 char *buffer_ = (BUF); \
876 if (symbol_[0] == '"') \
877 { \
878 strcpy (buffer_, "\"L"); \
879 strcpy (buffer_ + 2, symbol_ + 1); \
880 strcpy (buffer_ + (SYMBOL_LENGTH), "$lazy_ptr\""); \
881 } \
882 else if (name_needs_quotes (symbol_)) \
883 { \
884 strcpy (buffer_, "\"L"); \
885 strcpy (buffer_ + 2, symbol_); \
886 strcpy (buffer_ + (SYMBOL_LENGTH) + 2, "$lazy_ptr\""); \
887 } \
888 else \
889 { \
890 strcpy (buffer_, "L"); \
891 strcpy (buffer_ + 1, symbol_); \
892 strcpy (buffer_ + (SYMBOL_LENGTH) + 1, "$lazy_ptr"); \
893 } \
894 } while (0)
895
896 #define TARGET_ASM_EXCEPTION_SECTION darwin_exception_section
897
898 #define TARGET_ASM_EH_FRAME_SECTION darwin_eh_frame_section
899
900 #define EH_FRAME_SECTION_NAME "__TEXT"
901 #define EH_FRAME_SECTION_ATTR ",coalesced,no_toc+strip_static_syms"
902
903 #undef ASM_PREFERRED_EH_DATA_FORMAT
904 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL) \
905 (((CODE) == 2 && (GLOBAL) == 1) \
906 ? (DW_EH_PE_pcrel | DW_EH_PE_indirect) : \
907 ((CODE) == 1 || (GLOBAL) == 0) ? DW_EH_PE_pcrel : DW_EH_PE_absptr)
908
909 #define ASM_OUTPUT_DWARF_DELTA(FILE,SIZE,LABEL1,LABEL2) \
910 darwin_asm_output_dwarf_delta (FILE, SIZE, LABEL1, LABEL2)
911
912 #define ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX(ASM_OUT_FILE, ENCODING, SIZE, ADDR, DONE) \
913 if (ENCODING == ASM_PREFERRED_EH_DATA_FORMAT (2, 1)) { \
914 darwin_non_lazy_pcrel (ASM_OUT_FILE, ADDR); \
915 goto DONE; \
916 }
917
918
919 #define TARGET_TERMINATE_DW2_EH_FRAME_INFO false
920
921 #undef TARGET_ASM_NAMED_SECTION
922 #define TARGET_ASM_NAMED_SECTION darwin_asm_named_section
923 #undef TARGET_SECTION_TYPE_FLAGS
924 #define TARGET_SECTION_TYPE_FLAGS darwin_section_type_flags
925
926 #define DARWIN_REGISTER_TARGET_PRAGMAS() \
927 do { \
928 c_register_pragma (0, "mark", darwin_pragma_ignore); \
929 c_register_pragma (0, "options", darwin_pragma_options); \
930 c_register_pragma (0, "segment", darwin_pragma_ignore); \
931 c_register_pragma (0, "unused", darwin_pragma_unused); \
932 } while (0)
933
934 #undef ASM_APP_ON
935 #define ASM_APP_ON ""
936 #undef ASM_APP_OFF
937 #define ASM_APP_OFF ""
938
939 void darwin_register_frameworks (int);
940 #define TARGET_EXTRA_INCLUDES darwin_register_frameworks
941
942 void add_framework_path (char *);
943 #define TARGET_OPTF add_framework_path
944
945 #define TARGET_HAS_F_SETLKW
946
947 /* Darwin before 7.0 does not have C99 functions. */
948 #ifndef TARGET_C99_FUNCTIONS
949 #define TARGET_C99_FUNCTIONS 0
950 #endif
951
952 #define WINT_TYPE "int"
953
954 #endif /* CONFIG_DARWIN_H */
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