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", "-Zseg_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, "Zseg_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*} %(link_libgcc) %o %{fprofile-arcs|fprofile-generate|coverage:-lgcov} \
210 %{!nostdlib:%{!nodefaultlibs:%(link_ssp) %G %L}} \
211 %{!A:%{!nostdlib:%{!nostartfiles:%E}}} %{T*} %{F*} }}}}}}}}"
213 /* Please keep the random linker options in alphabetical order (modulo
214 'Z' and 'no' prefixes). Options that can only go to one of libtool
215 or ld must be listed twice, under both !Zdynamiclib and
216 Zdynamiclib, with one of the cases reporting an error. */
217 /* Note that options taking arguments may appear multiple times on a
218 command line with different arguments each time, so put a * after
219 their names so all of them get passed. */
221 "%{static}%{!static:-dynamic} \
222 %{fgnu-runtime:%:replace-outfile(-lobjc -lobjc-gnu)}\
224 %{Zforce_cpusubtype_ALL:-arch %(darwin_arch) -force_cpusubtype_ALL} \
225 %{!Zforce_cpusubtype_ALL:-arch %(darwin_subarch)} \
227 %{Zbundle_loader*:-bundle_loader %*} \
229 %{compatibility_version*:%e-compatibility_version only allowed with -dynamiclib\
231 %{current_version*:%e-current_version only allowed with -dynamiclib} \
232 %{Zforce_flat_namespace:-force_flat_namespace} \
233 %{Zinstall_name*:%e-install_name only allowed with -dynamiclib} \
234 %{keep_private_externs} \
238 %{Zbundle:%e-bundle not allowed with -dynamiclib} \
239 %{Zbundle_loader*:%e-bundle_loader not allowed with -dynamiclib} \
240 %{client_name*:%e-client_name not allowed with -dynamiclib} \
241 %{compatibility_version*} \
242 %{current_version*} \
243 %{Zforce_cpusubtype_ALL:-arch_only %(darwin_arch)} \
244 %{!Zforce_cpusubtype_ALL: -arch_only %(darwin_subarch)} \
245 %{Zforce_flat_namespace:%e-force_flat_namespace not allowed with -dynamiclib} \
246 %{Zinstall_name*:-install_name %*} \
247 %{keep_private_externs:%e-keep_private_externs not allowed with -dynamiclib} \
248 %{private_bundle:%e-private_bundle not allowed with -dynamiclib} \
250 %{Zall_load:-all_load}%{Zdynamiclib:%{!Zall_load:-noall_load}} \
251 %{Zallowable_client*:-allowable_client %*} \
252 %{Zbind_at_load:-bind_at_load} \
253 %{Zarch_errors_fatal:-arch_errors_fatal} \
254 %{Zdead_strip:-dead_strip} \
255 %{Zno_dead_strip_inits_and_terms:-no_dead_strip_inits_and_terms} \
256 %{Zdylib_file*:-dylib_file %*} \
257 %{Zdynamic:-dynamic}\
258 %{Zexported_symbols_list*:-exported_symbols_list %*} \
259 %{Zflat_namespace:-flat_namespace} \
260 %{headerpad_max_install_names*} \
261 %{Zimage_base*:-image_base %*} \
263 %{mmacosx-version-min=*:-macosx_version_min %*} \
265 %{Zmulti_module:-multi_module} %{Zsingle_module:-single_module} \
266 %{Zmultiply_defined*:-multiply_defined %*} \
267 %{Zmultiplydefinedunused*:-multiply_defined_unused %*} \
268 %{prebind} %{noprebind} %{nofixprebinding} %{prebind_all_twolevel_modules} \
269 %{read_only_relocs} \
270 %{sectcreate*} %{sectorder*} %{seg1addr*} %{segprot*} \
271 %{Zsegaddr*:-segaddr %*} \
272 %{Zsegs_read_only_addr*:-segs_read_only_addr %*} \
273 %{Zsegs_read_write_addr*:-segs_read_write_addr %*} \
274 %{Zseg_addr_table*: -seg_addr_table %*} \
275 %{Zseg_addr_table_filename*:-seg_addr_table_filename %*} \
276 %{sub_library*} %{sub_umbrella*} \
277 %{isysroot*:-syslibroot %*} \
278 %{twolevel_namespace} %{twolevel_namespace_hints} \
281 %{Zunexported_symbols_list*:-unexported_symbols_list %*} \
282 %{Zweak_reference_mismatches*:-weak_reference_mismatches %*} \
283 %{!Zweak_reference_mismatches*:-weak_reference_mismatches non-weak} \
287 %{pagezero_size*} %{segs_read_*} %{seglinkedit} %{noseglinkedit} \
288 %{sectalign*} %{sectobjectsymbols*} %{segcreate*} %{whyload} \
289 %{whatsloaded} %{dylinker_install_name*} \
290 %{dylinker} %{Mach} "
293 /* Machine dependent libraries. */
295 #define LIB_SPEC "%{!static:-lSystem}"
297 /* Support -mmacosx-version-min by supplying different (stub) libgcc_s.dylib
298 libraries to link against, and by not linking against libgcc_s on
301 Note that by default, -lgcc_eh is not linked against! This is
302 because in a future version of Darwin the EH frame information may
303 be in a new format, or the fallback routine might be changed; if
304 you want to explicitly link against the static version of those
305 routines, because you know you don't need to unwind through system
306 libraries, you need to explicitly say -static-libgcc.
308 If it is linked against, it has to be before -lgcc, because it may
309 need symbols from -lgcc. */
310 #undef REAL_LIBGCC_SPEC
311 #define REAL_LIBGCC_SPEC \
312 "%{static-libgcc|static: -lgcc_eh -lgcc; \
313 shared-libgcc|fexceptions: \
314 %:version-compare(!> 10.5 mmacosx-version-min= -lgcc_s.10.4) \
315 %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_s.10.5) \
317 :%:version-compare(>< 10.3.9 10.5 mmacosx-version-min= -lgcc_s.10.4) \
318 %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_s.10.5) \
321 /* We specify crt0.o as -lcrt0.o so that ld will search the library path. */
323 #undef STARTFILE_SPEC
324 #define STARTFILE_SPEC \
325 "%{!Zdynamiclib:%{Zbundle:%{!static:-lbundle1.o}} \
326 %{!Zbundle:%{pg:%{static:-lgcrt0.o} \
327 %{!static:%{object:-lgcrt0.o} \
328 %{!object:%{preload:-lgcrt0.o} \
329 %{!preload:-lgcrt1.o %(darwin_crt2)}}}} \
330 %{!pg:%{static:-lcrt0.o} \
331 %{!static:%{object:-lcrt0.o} \
332 %{!object:%{preload:-lcrt0.o} \
333 %{!preload:-lcrt1.o %(darwin_crt2)}}}}}}"
335 /* The native Darwin linker doesn't necessarily place files in the order
336 that they're specified on the link line. Thus, it is pointless
337 to put anything in ENDFILE_SPEC. */
338 /* #define ENDFILE_SPEC "" */
340 /* Default Darwin ASM_SPEC, very simple. */
341 #define ASM_SPEC "-arch %(darwin_arch) \
342 %{Zforce_cpusubtype_ALL:-force_cpusubtype_ALL}"
344 /* We use Dbx symbol format. */
346 #define DBX_DEBUGGING_INFO 1
348 /* Also enable Dwarf 2 as an option. */
349 #define DWARF2_DEBUGGING_INFO
350 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
352 #define DEBUG_FRAME_SECTION "__DWARFA,__debug_frame,coalesced,no_toc+strip_static_syms"
353 #define DEBUG_INFO_SECTION "__DWARFA,__debug_info"
354 #define DEBUG_ABBREV_SECTION "__DWARFA,__debug_abbrev"
355 #define DEBUG_ARANGES_SECTION "__DWARFA,__debug_aranges"
356 #define DEBUG_MACINFO_SECTION "__DWARFA,__debug_macinfo"
357 #define DEBUG_LINE_SECTION "__DWARFA,__debug_line"
358 #define DEBUG_LOC_SECTION "__DWARFA,__debug_loc"
359 #define DEBUG_PUBNAMES_SECTION "__DWARFA,__debug_pubnames"
360 #define DEBUG_STR_SECTION "__DWARFA,__debug_str"
361 #define DEBUG_RANGES_SECTION "__DWARFA,__debug_ranges"
363 /* When generating stabs debugging, use N_BINCL entries. */
365 #define DBX_USE_BINCL
367 /* There is no limit to the length of stabs strings. */
369 #define DBX_CONTIN_LENGTH 0
371 /* gdb needs a null N_SO at the end of each file for scattered loading. */
373 #define DBX_OUTPUT_NULL_N_SO_AT_MAIN_SOURCE_FILE_END
375 /* GCC's definition of 'one_only' is the same as its definition of 'weak'. */
376 #define MAKE_DECL_ONE_ONLY(DECL) (DECL_WEAK (DECL) = 1)
378 /* Mach-O supports 'weak imports', and 'weak definitions' in coalesced
379 sections. machopic_select_section ensures that weak variables go in
380 coalesced sections. Weak aliases (or any other kind of aliases) are
381 not supported. Weak symbols that aren't visible outside the .s file
382 are not supported. */
383 #define ASM_WEAKEN_DECL(FILE, DECL, NAME, ALIAS) \
387 warning (0, "alias definitions not supported in Mach-O; ignored"); \
391 if (! DECL_EXTERNAL (DECL) && TREE_PUBLIC (DECL)) \
392 targetm.asm_out.globalize_label (FILE, NAME); \
393 if (DECL_EXTERNAL (DECL)) \
394 fputs ("\t.weak_reference ", FILE); \
395 else if (! lookup_attribute ("weak", DECL_ATTRIBUTES (DECL)) \
396 && lookup_attribute ("weak_import", DECL_ATTRIBUTES (DECL))) \
398 else if (TREE_PUBLIC (DECL)) \
399 fputs ("\t.weak_definition ", FILE); \
402 assemble_name (FILE, NAME); \
403 fputc ('\n', FILE); \
406 /* Darwin has the pthread routines in libSystem, which every program
407 links to, so there's no need for weak-ness for that. */
408 #define GTHREAD_USE_WEAK 0
410 /* The Darwin linker imposes two limitations on common symbols: they
411 can't have hidden visibility, and they can't appear in dylibs. As
412 a consequence, we should never use common symbols to represent
414 #undef USE_COMMON_FOR_ONE_ONLY
415 #define USE_COMMON_FOR_ONE_ONLY 0
417 /* The Darwin linker doesn't want coalesced symbols to appear in
418 a static archive's table of contents. */
419 #undef TARGET_WEAK_NOT_IN_ARCHIVE_TOC
420 #define TARGET_WEAK_NOT_IN_ARCHIVE_TOC 1
422 /* On Darwin, we don't (at the time of writing) have linkonce sections
423 with names, so it's safe to make the class data not comdat. */
424 #define TARGET_CXX_CLASS_DATA_ALWAYS_COMDAT hook_bool_void_false
426 /* We make exception information linkonce. */
427 #undef TARGET_USES_WEAK_UNWIND_INFO
428 #define TARGET_USES_WEAK_UNWIND_INFO 1
430 /* We need to use a nonlocal label for the start of an EH frame: the
431 Darwin linker requires that a coalesced section start with a label. */
432 #undef FRAME_BEGIN_LABEL
433 #define FRAME_BEGIN_LABEL "EH_frame"
435 /* Emit a label for the FDE corresponding to DECL. EMPTY means
436 emit a label for an empty FDE. */
437 #define TARGET_ASM_EMIT_UNWIND_LABEL darwin_emit_unwind_label
439 /* Our profiling scheme doesn't LP labels and counter words. */
441 #define NO_PROFILE_COUNTERS 1
443 #undef INIT_SECTION_ASM_OP
444 #define INIT_SECTION_ASM_OP
448 #define TARGET_ASM_CONSTRUCTOR machopic_asm_out_constructor
449 #define TARGET_ASM_DESTRUCTOR machopic_asm_out_destructor
451 /* Always prefix with an underscore. */
453 #define USER_LABEL_PREFIX "_"
455 /* Don't output a .file directive. That is only used by the assembler for
457 #undef TARGET_ASM_FILE_START_FILE_DIRECTIVE
458 #define TARGET_ASM_FILE_START_FILE_DIRECTIVE false
460 #undef TARGET_ASM_FILE_END
461 #define TARGET_ASM_FILE_END darwin_file_end
463 #define ASM_OUTPUT_SKIP(FILE,SIZE) \
464 fprintf (FILE, "\t.space "HOST_WIDE_INT_PRINT_UNSIGNED"\n", SIZE)
466 /* Give ObjC methods pretty symbol names. */
468 #undef OBJC_GEN_METHOD_LABEL
469 #define OBJC_GEN_METHOD_LABEL(BUF,IS_INST,CLASS_NAME,CAT_NAME,SEL_NAME,NUM) \
471 sprintf (BUF, "%c[%s(%s) %s]", (IS_INST) ? '-' : '+', \
472 (CLASS_NAME), (CAT_NAME), (SEL_NAME)); \
474 sprintf (BUF, "%c[%s %s]", (IS_INST) ? '-' : '+', \
475 (CLASS_NAME), (SEL_NAME)); \
478 /* The RTTI data (e.g., __ti4name) is common and public (and static),
479 but it does need to be referenced via indirect PIC data pointers.
480 The machopic_define_symbol calls are telling the machopic subsystem
481 that the name *is* defined in this module, so it doesn't need to
482 make them indirect. */
484 #undef ASM_DECLARE_OBJECT_NAME
485 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL) \
487 const char *xname = NAME; \
488 if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF) \
489 xname = IDENTIFIER_POINTER (DECL_NAME (DECL)); \
490 if (! DECL_WEAK (DECL) \
491 && ((TREE_STATIC (DECL) \
492 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
493 || DECL_INITIAL (DECL))) \
494 machopic_define_symbol (DECL_RTL (DECL)); \
495 if ((TREE_STATIC (DECL) \
496 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
497 || DECL_INITIAL (DECL)) \
498 (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false); \
499 ASM_OUTPUT_LABEL (FILE, xname); \
500 /* Darwin doesn't support zero-size objects, so give them a \
502 if (tree_low_cst (DECL_SIZE_UNIT (DECL), 1) == 0) \
503 assemble_zeros (1); \
506 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
508 const char *xname = NAME; \
509 if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF) \
510 xname = IDENTIFIER_POINTER (DECL_NAME (DECL)); \
511 if (! DECL_WEAK (DECL) \
512 && ((TREE_STATIC (DECL) \
513 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
514 || DECL_INITIAL (DECL))) \
515 machopic_define_symbol (DECL_RTL (DECL)); \
516 if ((TREE_STATIC (DECL) \
517 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
518 || DECL_INITIAL (DECL)) \
519 (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false); \
520 ASM_OUTPUT_LABEL (FILE, xname); \
523 #define ASM_DECLARE_CONSTANT_NAME(FILE, NAME, EXP, SIZE) \
525 ASM_OUTPUT_LABEL (FILE, NAME); \
526 /* Darwin doesn't support zero-size objects, so give them a \
529 assemble_zeros (1); \
532 /* Wrap new method names in quotes so the assembler doesn't gag.
533 Make Objective-C internal symbols local. */
535 #undef ASM_OUTPUT_LABELREF
536 #define ASM_OUTPUT_LABELREF(FILE,NAME) \
538 const char *xname = (NAME); \
539 if (! strcmp (xname, "<pic base>")) \
540 machopic_output_function_base_name(FILE); \
541 else if (xname[0] == '&' || xname[0] == '*') \
543 int len = strlen (xname); \
544 if (len > 6 && !strcmp ("$stub", xname + len - 5)) \
545 machopic_validate_stub_or_non_lazy_ptr (xname); \
546 else if (len > 7 && !strcmp ("$stub\"", xname + len - 6)) \
547 machopic_validate_stub_or_non_lazy_ptr (xname); \
548 else if (len > 14 && !strcmp ("$non_lazy_ptr", xname + len - 13)) \
549 machopic_validate_stub_or_non_lazy_ptr (xname); \
550 else if (len > 15 && !strcmp ("$non_lazy_ptr\"", xname + len - 14)) \
551 machopic_validate_stub_or_non_lazy_ptr (xname); \
552 if (xname[1] != '"' && name_needs_quotes (&xname[1])) \
553 fprintf (FILE, "\"%s\"", &xname[1]); \
555 fputs (&xname[1], FILE); \
557 else if (xname[0] == '+' || xname[0] == '-') \
558 fprintf (FILE, "\"%s\"", xname); \
559 else if (!strncmp (xname, "_OBJC_", 6)) \
560 fprintf (FILE, "L%s", xname); \
561 else if (!strncmp (xname, ".objc_class_name_", 17)) \
562 fprintf (FILE, "%s", xname); \
563 else if (xname[0] != '"' && name_needs_quotes (xname)) \
564 fprintf (FILE, "\"%s\"", xname); \
566 asm_fprintf (FILE, "%U%s", xname); \
569 /* Output before executable code. */
570 #undef TEXT_SECTION_ASM_OP
571 #define TEXT_SECTION_ASM_OP "\t.text"
573 /* Output before writable data. */
575 #undef DATA_SECTION_ASM_OP
576 #define DATA_SECTION_ASM_OP "\t.data"
579 #define ALIGN_ASM_OP ".align"
581 #undef ASM_OUTPUT_ALIGN
582 #define ASM_OUTPUT_ALIGN(FILE,LOG) \
584 fprintf (FILE, "\t%s %d\n", ALIGN_ASM_OP, (LOG))
586 /* Ensure correct alignment of bss data. */
588 #undef ASM_OUTPUT_ALIGNED_DECL_LOCAL
589 #define ASM_OUTPUT_ALIGNED_DECL_LOCAL(FILE, DECL, NAME, SIZE, ALIGN) \
591 unsigned HOST_WIDE_INT _new_size = SIZE; \
592 fputs (".lcomm ", (FILE)); \
593 assemble_name ((FILE), (NAME)); \
594 if (_new_size == 0) _new_size = 1; \
595 fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED",%u\n", _new_size, \
596 floor_log2 ((ALIGN) / BITS_PER_UNIT)); \
597 if ((DECL) && ((TREE_STATIC (DECL) \
598 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
599 || DECL_INITIAL (DECL))) \
601 (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false); \
602 machopic_define_symbol (DECL_RTL (DECL)); \
606 /* The maximum alignment which the object file format can support.
607 For Mach-O, this is 2^15. */
609 #undef MAX_OFILE_ALIGNMENT
610 #define MAX_OFILE_ALIGNMENT 0x8000
612 /* Create new Mach-O sections. */
614 #undef SECTION_FUNCTION
615 #define SECTION_FUNCTION(FUNCTION, SECTION, DIRECTIVE, OBJC) \
616 extern void FUNCTION (void); \
620 if (in_section != SECTION) \
623 objc_section_init (); \
625 fputs ("\t" DIRECTIVE "\n", asm_out_file); \
626 in_section = SECTION; \
627 if ((SECTION == in_text_coal) \
628 || (SECTION == in_text_unlikely) \
629 || (SECTION == in_text_unlikely_coal)) \
630 last_text_section = SECTION; \
634 /* Darwin uses many types of special sections. */
636 #undef EXTRA_SECTIONS
637 #define EXTRA_SECTIONS \
638 in_text_coal, in_text_unlikely, in_text_unlikely_coal, \
639 in_const, in_const_data, in_cstring, in_literal4, in_literal8, \
640 in_const_coal, in_const_data_coal, in_data_coal, \
641 in_constructor, in_destructor, in_mod_init, in_mod_term, \
642 in_objc_class, in_objc_meta_class, in_objc_category, \
643 in_objc_class_vars, in_objc_instance_vars, \
644 in_objc_cls_meth, in_objc_inst_meth, \
645 in_objc_cat_cls_meth, in_objc_cat_inst_meth, \
646 in_objc_selector_refs, \
647 in_objc_selector_fixup, \
648 in_objc_symbols, in_objc_module_info, \
649 in_objc_protocol, in_objc_string_object, \
650 in_objc_constant_string_object, \
651 in_objc_image_info, \
652 in_objc_class_names, in_objc_meth_var_names, \
653 in_objc_meth_var_types, in_objc_cls_refs, \
654 in_machopic_nl_symbol_ptr, \
655 in_machopic_lazy_symbol_ptr, \
656 in_machopic_symbol_stub, \
657 in_machopic_symbol_stub1, \
658 in_machopic_picsymbol_stub, \
659 in_machopic_picsymbol_stub1, \
660 in_darwin_exception, in_darwin_eh_frame, \
663 #undef EXTRA_SECTION_FUNCTIONS
664 #define EXTRA_SECTION_FUNCTIONS \
665 static void objc_section_init (void); \
666 SECTION_FUNCTION (text_coal_section, \
668 ".section __TEXT,__textcoal_nt,coalesced," \
669 "pure_instructions", 0) \
670 SECTION_FUNCTION (text_unlikely_coal_section, \
671 in_text_unlikely_coal, \
672 ".section __TEXT,__text_unlikely_coal," \
673 "coalesced,pure_instructions", 0) \
674 SECTION_FUNCTION (const_section, \
677 SECTION_FUNCTION (const_coal_section, \
679 ".section __TEXT,__const_coal,coalesced", 0) \
680 SECTION_FUNCTION (const_data_section, \
683 SECTION_FUNCTION (const_data_coal_section, \
684 in_const_data_coal, \
685 ".section __DATA,__const_coal,coalesced", 0) \
686 SECTION_FUNCTION (data_coal_section, \
688 ".section __DATA,__datacoal_nt,coalesced", 0) \
689 SECTION_FUNCTION (cstring_section, \
692 SECTION_FUNCTION (literal4_section, \
695 SECTION_FUNCTION (literal8_section, \
698 SECTION_FUNCTION (constructor_section, \
701 SECTION_FUNCTION (mod_init_section, \
703 ".mod_init_func", 0) \
704 SECTION_FUNCTION (mod_term_section, \
706 ".mod_term_func", 0) \
707 SECTION_FUNCTION (destructor_section, \
710 SECTION_FUNCTION (objc_class_section, \
713 SECTION_FUNCTION (objc_meta_class_section, \
714 in_objc_meta_class, \
715 ".objc_meta_class", 1) \
716 SECTION_FUNCTION (objc_category_section, \
718 ".objc_category", 1) \
719 SECTION_FUNCTION (objc_class_vars_section, \
720 in_objc_class_vars, \
721 ".objc_class_vars", 1) \
722 SECTION_FUNCTION (objc_instance_vars_section, \
723 in_objc_instance_vars, \
724 ".objc_instance_vars", 1) \
725 SECTION_FUNCTION (objc_cls_meth_section, \
727 ".objc_cls_meth", 1) \
728 SECTION_FUNCTION (objc_inst_meth_section, \
730 ".objc_inst_meth", 1) \
731 SECTION_FUNCTION (objc_cat_cls_meth_section, \
732 in_objc_cat_cls_meth, \
733 ".objc_cat_cls_meth", 1) \
734 SECTION_FUNCTION (objc_cat_inst_meth_section, \
735 in_objc_cat_inst_meth, \
736 ".objc_cat_inst_meth", 1) \
737 SECTION_FUNCTION (objc_selector_refs_section, \
738 in_objc_selector_refs, \
739 ".objc_message_refs", 1) \
740 SECTION_FUNCTION (objc_selector_fixup_section, \
741 in_objc_selector_fixup, \
742 ".section __OBJC, __sel_fixup, regular, no_dead_strip", 1) \
743 SECTION_FUNCTION (objc_symbols_section, \
745 ".objc_symbols", 1) \
746 SECTION_FUNCTION (objc_module_info_section, \
747 in_objc_module_info, \
748 ".objc_module_info", 1) \
749 SECTION_FUNCTION (objc_protocol_section, \
751 ".objc_protocol", 1) \
752 SECTION_FUNCTION (objc_string_object_section, \
753 in_objc_string_object, \
754 ".objc_string_object", 1) \
755 SECTION_FUNCTION (objc_constant_string_object_section, \
756 in_objc_constant_string_object, \
757 ".section __OBJC, __cstring_object, regular, " \
758 "no_dead_strip", 1) \
759 /* Fix-and-Continue image marker. */ \
760 SECTION_FUNCTION (objc_image_info_section, \
761 in_objc_image_info, \
762 ".section __OBJC, __image_info, regular, " \
763 "no_dead_strip", 1) \
764 SECTION_FUNCTION (objc_class_names_section, \
765 in_objc_class_names, \
766 ".objc_class_names", 1) \
767 SECTION_FUNCTION (objc_meth_var_names_section, \
768 in_objc_meth_var_names, \
769 ".objc_meth_var_names", 1) \
770 SECTION_FUNCTION (objc_meth_var_types_section, \
771 in_objc_meth_var_types, \
772 ".objc_meth_var_types", 1) \
773 SECTION_FUNCTION (objc_cls_refs_section, \
775 ".objc_cls_refs", 1) \
777 SECTION_FUNCTION (machopic_lazy_symbol_ptr_section, \
778 in_machopic_lazy_symbol_ptr, \
779 ".lazy_symbol_pointer", 0) \
780 SECTION_FUNCTION (machopic_nl_symbol_ptr_section, \
781 in_machopic_nl_symbol_ptr, \
782 ".non_lazy_symbol_pointer", 0) \
783 SECTION_FUNCTION (machopic_symbol_stub_section, \
784 in_machopic_symbol_stub, \
786 SECTION_FUNCTION (machopic_symbol_stub1_section, \
787 in_machopic_symbol_stub1, \
788 ".section __TEXT,__symbol_stub1,symbol_stubs," \
789 "pure_instructions,16", 0) \
790 SECTION_FUNCTION (machopic_picsymbol_stub_section, \
791 in_machopic_picsymbol_stub, \
792 ".picsymbol_stub", 0) \
793 SECTION_FUNCTION (machopic_picsymbol_stub1_section, \
794 in_machopic_picsymbol_stub1, \
795 ".section __TEXT,__picsymbolstub1,symbol_stubs," \
796 "pure_instructions,32", 0) \
797 SECTION_FUNCTION (darwin_exception_section, \
798 in_darwin_exception, \
799 ".section __DATA,__gcc_except_tab", 0) \
800 SECTION_FUNCTION (darwin_eh_frame_section, \
801 in_darwin_eh_frame, \
802 ".section " EH_FRAME_SECTION_NAME ",__eh_frame" \
803 EH_FRAME_SECTION_ATTR, 0) \
806 objc_section_init (void) \
808 static int been_here = 0; \
810 if (been_here == 0) \
813 /* written, cold -> hot */ \
814 objc_cat_cls_meth_section (); \
815 objc_cat_inst_meth_section (); \
816 objc_string_object_section (); \
817 objc_constant_string_object_section (); \
818 objc_selector_refs_section (); \
819 objc_selector_fixup_section (); \
820 objc_cls_refs_section (); \
821 objc_class_section (); \
822 objc_meta_class_section (); \
823 /* shared, hot -> cold */ \
824 objc_cls_meth_section (); \
825 objc_inst_meth_section (); \
826 objc_protocol_section (); \
827 objc_class_names_section (); \
828 objc_meth_var_types_section (); \
829 objc_meth_var_names_section (); \
830 objc_category_section (); \
831 objc_class_vars_section (); \
832 objc_instance_vars_section (); \
833 objc_module_info_section (); \
834 objc_symbols_section (); \
838 #define READONLY_DATA_SECTION const_section
840 #undef TARGET_ASM_SELECT_SECTION
841 #define TARGET_ASM_SELECT_SECTION machopic_select_section
842 #define USE_SELECT_SECTION_FOR_FUNCTIONS
844 #undef TARGET_ASM_SELECT_RTX_SECTION
845 #define TARGET_ASM_SELECT_RTX_SECTION machopic_select_rtx_section
846 #undef TARGET_ASM_UNIQUE_SECTION
847 #define TARGET_ASM_UNIQUE_SECTION darwin_unique_section
848 #undef TARGET_ASM_FUNCTION_RODATA_SECTION
849 #define TARGET_ASM_FUNCTION_RODATA_SECTION default_no_function_rodata_section
852 #define ASM_DECLARE_UNRESOLVED_REFERENCE(FILE,NAME) \
855 if (MACHOPIC_INDIRECT) \
856 fprintf (FILE, "\t.lazy_reference "); \
858 fprintf (FILE, "\t.reference "); \
859 assemble_name (FILE, NAME); \
860 fprintf (FILE, "\n"); \
864 #define ASM_DECLARE_CLASS_REFERENCE(FILE,NAME) \
867 fprintf (FILE, "\t"); \
868 assemble_name (FILE, NAME); \
869 fprintf (FILE, "=0\n"); \
870 (*targetm.asm_out.globalize_label) (FILE, NAME); \
874 /* Globalizing directive for a label. */
875 #define GLOBAL_ASM_OP ".globl "
876 #define TARGET_ASM_GLOBALIZE_LABEL darwin_globalize_label
878 /* Emit an assembler directive to set visibility for a symbol. Used
879 to support visibility attribute and Darwin's private extern
881 #undef TARGET_ASM_ASSEMBLE_VISIBILITY
882 #define TARGET_ASM_ASSEMBLE_VISIBILITY darwin_assemble_visibility
884 /* Extra attributes for Darwin. */
885 #define SUBTARGET_ATTRIBUTE_TABLE \
886 /* { name, min_len, max_len, decl_req, type_req, fn_type_req, handler } */ \
887 { "weak_import", 0, 0, true, false, false, \
888 darwin_handle_weak_import_attribute }
890 #undef ASM_GENERATE_INTERNAL_LABEL
891 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM) \
892 sprintf (LABEL, "*%s%ld", PREFIX, (long)(NUM))
894 #undef TARGET_ASM_MARK_DECL_PRESERVED
895 #define TARGET_ASM_MARK_DECL_PRESERVED darwin_mark_decl_preserved
897 /* Set on a symbol with SYMBOL_FLAG_FUNCTION or
898 MACHO_SYMBOL_FLAG_VARIABLE to indicate that the function or
899 variable has been defined in this translation unit. */
901 #define MACHO_SYMBOL_FLAG_VARIABLE (SYMBOL_FLAG_MACH_DEP)
902 #define MACHO_SYMBOL_FLAG_DEFINED ((SYMBOL_FLAG_MACH_DEP) << 1)
904 /* Set on a symbol to indicate when fix-and-continue style code
905 generation is being used and the symbol refers to a static symbol
906 that should be rebound from new instances of a translation unit to
907 the original instance of the data. */
909 #define MACHO_SYMBOL_STATIC ((SYMBOL_FLAG_MACH_DEP) << 2)
911 /* Symbolic names for various things we might know about a symbol. */
913 enum machopic_addr_class {
915 MACHOPIC_DEFINED_DATA,
916 MACHOPIC_UNDEFINED_DATA,
917 MACHOPIC_DEFINED_FUNCTION,
918 MACHOPIC_UNDEFINED_FUNCTION
921 /* Macros defining the various PIC cases. */
923 #define MACHO_DYNAMIC_NO_PIC_P (TARGET_DYNAMIC_NO_PIC)
924 #define MACHOPIC_INDIRECT (flag_pic || MACHO_DYNAMIC_NO_PIC_P)
925 #define MACHOPIC_JUST_INDIRECT (flag_pic == 1 || MACHO_DYNAMIC_NO_PIC_P)
926 #define MACHOPIC_PURE (flag_pic == 2 && ! MACHO_DYNAMIC_NO_PIC_P)
928 #undef TARGET_ENCODE_SECTION_INFO
929 #define TARGET_ENCODE_SECTION_INFO darwin_encode_section_info
930 #undef TARGET_STRIP_NAME_ENCODING
931 #define TARGET_STRIP_NAME_ENCODING default_strip_name_encoding
933 #define GEN_BINDER_NAME_FOR_STUB(BUF,STUB,STUB_LENGTH) \
935 const char *const stub_ = (STUB); \
936 char *buffer_ = (BUF); \
937 strcpy (buffer_, stub_); \
938 if (stub_[0] == '"') \
940 strcpy (buffer_ + (STUB_LENGTH) - 1, "_binder\""); \
944 strcpy (buffer_ + (STUB_LENGTH), "_binder"); \
948 #define GEN_SYMBOL_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH) \
950 const char *const symbol_ = (SYMBOL); \
951 char *buffer_ = (BUF); \
952 if (name_needs_quotes (symbol_) && symbol_[0] != '"') \
954 sprintf (buffer_, "\"%s\"", symbol_); \
958 strcpy (buffer_, symbol_); \
962 /* Given a symbol name string, create the lazy pointer version
963 of the symbol name. */
965 #define GEN_LAZY_PTR_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH) \
967 const char *symbol_ = (SYMBOL); \
968 char *buffer_ = (BUF); \
969 if (symbol_[0] == '"') \
971 strcpy (buffer_, "\"L"); \
972 strcpy (buffer_ + 2, symbol_ + 1); \
973 strcpy (buffer_ + (SYMBOL_LENGTH), "$lazy_ptr\""); \
975 else if (name_needs_quotes (symbol_)) \
977 strcpy (buffer_, "\"L"); \
978 strcpy (buffer_ + 2, symbol_); \
979 strcpy (buffer_ + (SYMBOL_LENGTH) + 2, "$lazy_ptr\""); \
983 strcpy (buffer_, "L"); \
984 strcpy (buffer_ + 1, symbol_); \
985 strcpy (buffer_ + (SYMBOL_LENGTH) + 1, "$lazy_ptr"); \
989 #define TARGET_ASM_EXCEPTION_SECTION darwin_exception_section
991 #define TARGET_ASM_EH_FRAME_SECTION darwin_eh_frame_section
993 #define EH_FRAME_SECTION_NAME "__TEXT"
994 #define EH_FRAME_SECTION_ATTR ",coalesced,no_toc+strip_static_syms+live_support"
996 /* Java runtime class list. */
997 #define JCR_SECTION_NAME "__DATA,jcr,regular,no_dead_strip"
999 #undef ASM_PREFERRED_EH_DATA_FORMAT
1000 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL) \
1001 (((CODE) == 2 && (GLOBAL) == 1) \
1002 ? (DW_EH_PE_pcrel | DW_EH_PE_indirect | DW_EH_PE_sdata4) : \
1003 ((CODE) == 1 || (GLOBAL) == 0) ? DW_EH_PE_pcrel : DW_EH_PE_absptr)
1005 #define ASM_OUTPUT_DWARF_DELTA(FILE,SIZE,LABEL1,LABEL2) \
1006 darwin_asm_output_dwarf_delta (FILE, SIZE, LABEL1, LABEL2)
1008 #define ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX(ASM_OUT_FILE, ENCODING, SIZE, ADDR, DONE) \
1009 if (ENCODING == ASM_PREFERRED_EH_DATA_FORMAT (2, 1)) { \
1010 darwin_non_lazy_pcrel (ASM_OUT_FILE, ADDR); \
1014 /* Experimentally, putting jump tables in text is faster on SPEC.
1015 Also this is needed for correctness for coalesced functions. */
1017 #ifndef JUMP_TABLES_IN_TEXT_SECTION
1018 #define JUMP_TABLES_IN_TEXT_SECTION 1
1021 #define TARGET_TERMINATE_DW2_EH_FRAME_INFO false
1023 #undef TARGET_ASM_NAMED_SECTION
1024 #define TARGET_ASM_NAMED_SECTION darwin_asm_named_section
1026 #define DARWIN_REGISTER_TARGET_PRAGMAS() \
1028 c_register_pragma (0, "mark", darwin_pragma_ignore); \
1029 c_register_pragma (0, "options", darwin_pragma_options); \
1030 c_register_pragma (0, "segment", darwin_pragma_ignore); \
1031 c_register_pragma (0, "unused", darwin_pragma_unused); \
1035 #define ASM_APP_ON ""
1037 #define ASM_APP_OFF ""
1039 void darwin_register_frameworks (const char *, const char *, int);
1040 void darwin_register_objc_includes (const char *, const char *, int);
1041 #define TARGET_EXTRA_PRE_INCLUDES darwin_register_objc_includes
1042 #define TARGET_EXTRA_INCLUDES darwin_register_frameworks
1044 void add_framework_path (char *);
1045 #define TARGET_OPTF add_framework_path
1047 #define TARGET_POSIX_IO
1049 /* All new versions of Darwin have C99 functions. */
1050 #define TARGET_C99_FUNCTIONS 1
1052 #define WINT_TYPE "int"
1054 #endif /* CONFIG_DARWIN_H */