1 /* Target definitions for Darwin (Mac OS X) systems.
2 Copyright (C) 1989, 1990, 1991, 1992, 1993, 2000, 2001, 2002, 2003, 2004,
4 Free Software Foundation, Inc.
5 Contributed by Apple Computer Inc.
7 This file is part of GCC.
9 GCC is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2, or (at your option)
14 GCC is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with GCC; see the file COPYING. If not, write to
21 the Free Software Foundation, 51 Franklin Street, Fifth Floor,
22 Boston, MA 02110-1301, USA. */
24 #ifndef CONFIG_DARWIN_H
25 #define CONFIG_DARWIN_H
27 /* The definitions in this file are common to all processor types
28 running Darwin, which is the kernel for Mac OS X. Darwin is
29 basically a BSD user layer laid over a Mach kernel, then evolved
30 for many years (at NeXT) in parallel with other Unix systems. So
31 while the runtime is a somewhat idiosyncratic Mach-based thing,
32 other definitions look like they would for a BSD variant. */
34 /* Although NeXT ran on many different architectures, as of Jan 2001
35 the only supported Darwin targets are PowerPC and x86. */
37 /* One of Darwin's NeXT legacies is the Mach-O format, which is partly
38 like a.out and partly like COFF, with additional features like
39 multi-architecture binary support. */
41 #define OBJECT_FORMAT_MACHO
43 /* Suppress g++ attempt to link in the math library automatically. */
44 #define MATH_LIBRARY ""
50 /* Define an empty body for the function do_global_dtors() in libgcc2.c. */
52 #define DO_GLOBAL_DTORS_BODY
54 /* The string value for __SIZE_TYPE__. */
57 #define SIZE_TYPE "long unsigned int"
60 /* Type used for ptrdiff_t, as a string used in a declaration. */
63 #define PTRDIFF_TYPE "int"
68 #define WCHAR_TYPE "int"
69 #undef WCHAR_TYPE_SIZE
70 #define WCHAR_TYPE_SIZE 32
72 /* Default to using the NeXT-style runtime, since that's what is
73 pre-installed on Darwin systems. */
75 #define NEXT_OBJC_RUNTIME
77 /* Don't default to pcc-struct-return, because gcc is the only compiler, and
78 we want to retain compatibility with older gcc versions. */
80 #undef DEFAULT_PCC_STRUCT_RETURN
81 #define DEFAULT_PCC_STRUCT_RETURN 0
83 /* True if pragma ms_struct is in effect. */
84 extern GTY(()) int darwin_ms_struct;
86 /* This table intercepts weirdo options whose names would interfere
87 with normal driver conventions, and either translates them into
88 standardly-named options, or adds a 'Z' so that they can get to
89 specs processing without interference.
91 Do not expand a linker option to "-Xlinker -<option>", since that
92 forfeits the ability to control via spec strings later. However,
93 as a special exception, do this translation with -filelist, because
94 otherwise the driver will think there are no input files and quit.
95 (The alternative would be to hack the driver to recognize -filelist
96 specially, but it's simpler to use the translation table.)
98 Note that an option name with a prefix that matches another option
99 name, that also takes an argument, needs to be modified so the
100 prefix is different, otherwise a '*' after the shorter option will
101 match with the longer one.
103 The SUBTARGET_OPTION_TRANSLATE_TABLE macro, which _must_ be defined
104 in gcc/config/{i386,rs6000}/darwin.h, should contain any additional
105 command-line option translations specific to the particular target
108 #define TARGET_OPTION_TRANSLATE_TABLE \
109 { "-all_load", "-Zall_load" }, \
110 { "-allowable_client", "-Zallowable_client" }, \
111 { "-arch_errors_fatal", "-Zarch_errors_fatal" }, \
112 { "-bind_at_load", "-Zbind_at_load" }, \
113 { "-bundle", "-Zbundle" }, \
114 { "-bundle_loader", "-Zbundle_loader" }, \
115 { "-weak_reference_mismatches", "-Zweak_reference_mismatches" }, \
116 { "-dead_strip", "-Zdead_strip" }, \
117 { "-no_dead_strip_inits_and_terms", "-Zno_dead_strip_inits_and_terms" }, \
118 { "-dependency-file", "-MF" }, \
119 { "-dylib_file", "-Zdylib_file" }, \
120 { "-dynamic", "-Zdynamic" }, \
121 { "-dynamiclib", "-Zdynamiclib" }, \
122 { "-exported_symbols_list", "-Zexported_symbols_list" }, \
123 { "-gfull", "-g -fno-eliminate-unused-debug-symbols" }, \
124 { "-gused", "-g -feliminate-unused-debug-symbols" }, \
125 { "-segaddr", "-Zsegaddr" }, \
126 { "-segs_read_only_addr", "-Zsegs_read_only_addr" }, \
127 { "-segs_read_write_addr", "-Zsegs_read_write_addr" }, \
128 { "-seg_addr_table", "-Zseg_addr_table" }, \
129 { "-seg_addr_table_filename", "-Zfn_seg_addr_table_filename" }, \
130 { "-filelist", "-Xlinker -filelist -Xlinker" }, \
131 { "-framework", "-Xlinker -framework -Xlinker" }, \
132 { "-flat_namespace", "-Zflat_namespace" }, \
133 { "-force_cpusubtype_ALL", "-Zforce_cpusubtype_ALL" }, \
134 { "-force_flat_namespace", "-Zforce_flat_namespace" }, \
135 { "-image_base", "-Zimage_base" }, \
136 { "-init", "-Zinit" }, \
137 { "-install_name", "-Zinstall_name" }, \
138 { "-multiply_defined_unused", "-Zmultiplydefinedunused" }, \
139 { "-multiply_defined", "-Zmultiply_defined" }, \
140 { "-multi_module", "-Zmulti_module" }, \
141 { "-static", "-static -Wa,-static" }, \
142 { "-single_module", "-Zsingle_module" }, \
143 { "-unexported_symbols_list", "-Zunexported_symbols_list" }, \
144 SUBTARGET_OPTION_TRANSLATE_TABLE
146 /* These compiler options take n arguments. */
148 #undef WORD_SWITCH_TAKES_ARG
149 #define WORD_SWITCH_TAKES_ARG(STR) \
150 (DEFAULT_WORD_SWITCH_TAKES_ARG (STR) ? 1 : \
151 !strcmp (STR, "Zallowable_client") ? 1 : \
152 !strcmp (STR, "arch") ? 1 : \
153 !strcmp (STR, "arch_only") ? 1 : \
154 !strcmp (STR, "Zbundle_loader") ? 1 : \
155 !strcmp (STR, "client_name") ? 1 : \
156 !strcmp (STR, "compatibility_version") ? 1 : \
157 !strcmp (STR, "current_version") ? 1 : \
158 !strcmp (STR, "Zdylib_file") ? 1 : \
159 !strcmp (STR, "Zexported_symbols_list") ? 1 : \
160 !strcmp (STR, "Zimage_base") ? 1 : \
161 !strcmp (STR, "Zinit") ? 1 : \
162 !strcmp (STR, "Zinstall_name") ? 1 : \
163 !strcmp (STR, "Zmultiplydefinedunused") ? 1 : \
164 !strcmp (STR, "Zmultiply_defined") ? 1 : \
165 !strcmp (STR, "precomp-trustfile") ? 1 : \
166 !strcmp (STR, "read_only_relocs") ? 1 : \
167 !strcmp (STR, "sectcreate") ? 3 : \
168 !strcmp (STR, "sectorder") ? 3 : \
169 !strcmp (STR, "Zsegaddr") ? 2 : \
170 !strcmp (STR, "Zsegs_read_only_addr") ? 1 : \
171 !strcmp (STR, "Zsegs_read_write_addr") ? 1 : \
172 !strcmp (STR, "Zseg_addr_table") ? 1 : \
173 !strcmp (STR, "Zfn_seg_addr_table_filename") ? 1 :\
174 !strcmp (STR, "seg1addr") ? 1 : \
175 !strcmp (STR, "segprot") ? 3 : \
176 !strcmp (STR, "sub_library") ? 1 : \
177 !strcmp (STR, "sub_umbrella") ? 1 : \
178 !strcmp (STR, "umbrella") ? 1 : \
179 !strcmp (STR, "undefined") ? 1 : \
180 !strcmp (STR, "Zunexported_symbols_list") ? 1 : \
181 !strcmp (STR, "Zweak_reference_mismatches") ? 1 : \
182 !strcmp (STR, "pagezero_size") ? 1 : \
183 !strcmp (STR, "segs_read_only_addr") ? 1 : \
184 !strcmp (STR, "segs_read_write_addr") ? 1 : \
185 !strcmp (STR, "sectalign") ? 3 : \
186 !strcmp (STR, "sectobjectsymbols") ? 2 : \
187 !strcmp (STR, "segcreate") ? 3 : \
188 !strcmp (STR, "dylinker_install_name") ? 1 : \
191 /* Machine dependent cpp options. Don't add more options here, add
192 them to darwin_cpp_builtins in darwin-c.c. */
195 #define CPP_SPEC "%{static:%{!dynamic:-D__STATIC__}}%{!static:-D__DYNAMIC__}"
197 /* This is mostly a clone of the standard LINK_COMMAND_SPEC, plus
198 precomp, libtool, and fat build additions. Also we
199 don't specify a second %G after %L because libSystem is
200 self-contained and doesn't need to link against libgcc.a. */
201 /* In general, random Darwin linker flags should go into LINK_SPEC
202 instead of LINK_COMMAND_SPEC. The command spec is better for
203 specifying the handling of options understood by generic Unix
204 linkers, and for positional arguments like libraries. */
205 #define LINK_COMMAND_SPEC "\
206 %{!fdump=*:%{!fsyntax-only:%{!precomp:%{!c:%{!M:%{!MM:%{!E:%{!S:\
207 %{!Zdynamiclib:%(linker)}%{Zdynamiclib:/usr/bin/libtool} \
208 %l %X %{d} %{s} %{t} %{Z} \
209 %{!Zdynamiclib:%{A} %{e*} %{m} %{N} %{n} %{r} %{u*} %{x} %{z}} \
210 %{@:-o %f%u.out}%{!@:%{o*}%{!o:-o a.out}} \
211 %{!A:%{!nostdlib:%{!nostartfiles:%S}}} \
212 %{L*} %{fopenmp:%:include(libgomp.spec)%(link_gomp)} \
213 %(link_libgcc) %o %{fprofile-arcs|fprofile-generate|coverage:-lgcov} \
214 %{!nostdlib:%{!nodefaultlibs:%(link_ssp) %G %L}} \
215 %{!A:%{!nostdlib:%{!nostartfiles:%E}}} %{T*} %{F*} }}}}}}}}"
217 #ifdef TARGET_SYSTEM_ROOT
218 #define LINK_SYSROOT_SPEC \
219 "%{isysroot*:-syslibroot %*;:-syslibroot " TARGET_SYSTEM_ROOT "}"
221 #define LINK_SYSROOT_SPEC "%{isysroot*:-syslibroot %*}"
224 /* Please keep the random linker options in alphabetical order (modulo
225 'Z' and 'no' prefixes). Options that can only go to one of libtool
226 or ld must be listed twice, under both !Zdynamiclib and
227 Zdynamiclib, with one of the cases reporting an error. */
228 /* Note that options taking arguments may appear multiple times on a
229 command line with different arguments each time, so put a * after
230 their names so all of them get passed. */
232 "%{static}%{!static:-dynamic} \
233 %{fgnu-runtime:%:replace-outfile(-lobjc -lobjc-gnu)}\
235 %{Zforce_cpusubtype_ALL:-arch %(darwin_arch) -force_cpusubtype_ALL} \
236 %{!Zforce_cpusubtype_ALL:-arch %(darwin_subarch)} \
238 %{Zbundle_loader*:-bundle_loader %*} \
240 %{compatibility_version*:%e-compatibility_version only allowed with -dynamiclib\
242 %{current_version*:%e-current_version only allowed with -dynamiclib} \
243 %{Zforce_flat_namespace:-force_flat_namespace} \
244 %{Zinstall_name*:%e-install_name only allowed with -dynamiclib} \
245 %{keep_private_externs} \
249 %{Zbundle:%e-bundle not allowed with -dynamiclib} \
250 %{Zbundle_loader*:%e-bundle_loader not allowed with -dynamiclib} \
251 %{client_name*:%e-client_name not allowed with -dynamiclib} \
252 %{compatibility_version*} \
253 %{current_version*} \
254 %{Zforce_cpusubtype_ALL:-arch_only %(darwin_arch)} \
255 %{!Zforce_cpusubtype_ALL: -arch_only %(darwin_subarch)} \
256 %{Zforce_flat_namespace:%e-force_flat_namespace not allowed with -dynamiclib} \
257 %{Zinstall_name*:-install_name %*} \
258 %{keep_private_externs:%e-keep_private_externs not allowed with -dynamiclib} \
259 %{private_bundle:%e-private_bundle not allowed with -dynamiclib} \
261 %{Zall_load:-all_load}%{Zdynamiclib:%{!Zall_load:-noall_load}} \
262 %{Zallowable_client*:-allowable_client %*} \
263 %{Zbind_at_load:-bind_at_load} \
264 %{Zarch_errors_fatal:-arch_errors_fatal} \
265 %{Zdead_strip:-dead_strip} \
266 %{Zno_dead_strip_inits_and_terms:-no_dead_strip_inits_and_terms} \
267 %{Zdylib_file*:-dylib_file %*} \
268 %{Zdynamic:-dynamic}\
269 %{Zexported_symbols_list*:-exported_symbols_list %*} \
270 %{Zflat_namespace:-flat_namespace} \
271 %{headerpad_max_install_names*} \
272 %{Zimage_base*:-image_base %*} \
274 %{mmacosx-version-min=*:-macosx_version_min %*} \
275 %{!mmacosx-version-min=*:%{shared-libgcc:-macosx_version_min 10.3}} \
277 %{Zmulti_module:-multi_module} %{Zsingle_module:-single_module} \
278 %{Zmultiply_defined*:-multiply_defined %*} \
279 %{!Zmultiply_defined*:%{shared-libgcc: \
280 %:version-compare(< 10.5 mmacosx-version-min= -multiply_defined) \
281 %:version-compare(< 10.5 mmacosx-version-min= suppress)}} \
282 %{Zmultiplydefinedunused*:-multiply_defined_unused %*} \
283 %{prebind} %{noprebind} %{nofixprebinding} %{prebind_all_twolevel_modules} \
284 %{read_only_relocs} \
285 %{sectcreate*} %{sectorder*} %{seg1addr*} %{segprot*} \
286 %{Zsegaddr*:-segaddr %*} \
287 %{Zsegs_read_only_addr*:-segs_read_only_addr %*} \
288 %{Zsegs_read_write_addr*:-segs_read_write_addr %*} \
289 %{Zseg_addr_table*: -seg_addr_table %*} \
290 %{Zfn_seg_addr_table_filename*:-seg_addr_table_filename %*} \
291 %{sub_library*} %{sub_umbrella*} \
292 " LINK_SYSROOT_SPEC " \
293 %{twolevel_namespace} %{twolevel_namespace_hints} \
296 %{Zunexported_symbols_list*:-unexported_symbols_list %*} \
297 %{Zweak_reference_mismatches*:-weak_reference_mismatches %*} \
298 %{!Zweak_reference_mismatches*:-weak_reference_mismatches non-weak} \
302 %{pagezero_size*} %{segs_read_*} %{seglinkedit} %{noseglinkedit} \
303 %{sectalign*} %{sectobjectsymbols*} %{segcreate*} %{whyload} \
304 %{whatsloaded} %{dylinker_install_name*} \
305 %{dylinker} %{Mach} "
308 /* Machine dependent libraries. */
310 #define LIB_SPEC "%{!static:-lSystem}"
312 /* Support -mmacosx-version-min by supplying different (stub) libgcc_s.dylib
313 libraries to link against, and by not linking against libgcc_s on
316 Note that by default, -lgcc_eh is not linked against! This is
317 because in a future version of Darwin the EH frame information may
318 be in a new format, or the fallback routine might be changed; if
319 you want to explicitly link against the static version of those
320 routines, because you know you don't need to unwind through system
321 libraries, you need to explicitly say -static-libgcc.
323 If it is linked against, it has to be before -lgcc, because it may
324 need symbols from -lgcc. */
325 #undef REAL_LIBGCC_SPEC
326 #define REAL_LIBGCC_SPEC \
327 "%{static-libgcc|static: -lgcc_eh -lgcc; \
328 shared-libgcc|fexceptions: \
329 %:version-compare(!> 10.5 mmacosx-version-min= -lgcc_s.10.4) \
330 %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_s.10.5) \
332 :%:version-compare(>< 10.3.9 10.5 mmacosx-version-min= -lgcc_s.10.4) \
333 %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_s.10.5) \
336 /* We specify crt0.o as -lcrt0.o so that ld will search the library path.
338 crt3.o provides __cxa_atexit on systems that don't have it. Since
339 it's only used with C++, which requires passing -shared-libgcc, key
340 off that to avoid unnecessarily adding a destructor to every
341 powerpc program built. */
343 #undef STARTFILE_SPEC
344 #define STARTFILE_SPEC \
345 "%{!Zdynamiclib:%{Zbundle:%{!static:-lbundle1.o}} \
346 %{!Zbundle:%{pg:%{static:-lgcrt0.o} \
347 %{!static:%{object:-lgcrt0.o} \
348 %{!object:%{preload:-lgcrt0.o} \
349 %{!preload:-lgcrt1.o %(darwin_crt2)}}}} \
350 %{!pg:%{static:-lcrt0.o} \
351 %{!static:%{object:-lcrt0.o} \
352 %{!object:%{preload:-lcrt0.o} \
353 %{!preload:-lcrt1.o %(darwin_crt2)}}}}}} \
354 %{shared-libgcc:%:version-compare(< 10.5 mmacosx-version-min= crt3.o%s)}"
356 /* The native Darwin linker doesn't necessarily place files in the order
357 that they're specified on the link line. Thus, it is pointless
358 to put anything in ENDFILE_SPEC. */
359 /* #define ENDFILE_SPEC "" */
361 /* Default Darwin ASM_SPEC, very simple. */
362 #define ASM_SPEC "-arch %(darwin_arch) \
363 %{Zforce_cpusubtype_ALL:-force_cpusubtype_ALL}"
365 /* We use Dbx symbol format. */
367 #define DBX_DEBUGGING_INFO 1
369 /* Also enable Dwarf 2 as an option. */
370 #define DWARF2_DEBUGGING_INFO
371 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
373 #define DEBUG_FRAME_SECTION "__DWARF,__debug_frame,regular,debug"
374 #define DEBUG_INFO_SECTION "__DWARF,__debug_info,regular,debug"
375 #define DEBUG_ABBREV_SECTION "__DWARF,__debug_abbrev,regular,debug"
376 #define DEBUG_ARANGES_SECTION "__DWARF,__debug_aranges,regular,debug"
377 #define DEBUG_MACINFO_SECTION "__DWARF,__debug_macinfo,regular,debug"
378 #define DEBUG_LINE_SECTION "__DWARF,__debug_line,regular,debug"
379 #define DEBUG_LOC_SECTION "__DWARF,__debug_loc,regular,debug"
380 #define DEBUG_PUBNAMES_SECTION "__DWARF,__debug_pubnames,regular,debug"
381 #define DEBUG_STR_SECTION "__DWARF,__debug_str,regular,debug"
382 #define DEBUG_RANGES_SECTION "__DWARF,__debug_ranges,regular,debug"
384 /* When generating stabs debugging, use N_BINCL entries. */
386 #define DBX_USE_BINCL
388 /* There is no limit to the length of stabs strings. */
390 #define DBX_CONTIN_LENGTH 0
392 /* gdb needs a null N_SO at the end of each file for scattered loading. */
394 #define DBX_OUTPUT_NULL_N_SO_AT_MAIN_SOURCE_FILE_END
396 /* GCC's definition of 'one_only' is the same as its definition of 'weak'. */
397 #define MAKE_DECL_ONE_ONLY(DECL) (DECL_WEAK (DECL) = 1)
399 /* Mach-O supports 'weak imports', and 'weak definitions' in coalesced
400 sections. machopic_select_section ensures that weak variables go in
401 coalesced sections. Weak aliases (or any other kind of aliases) are
402 not supported. Weak symbols that aren't visible outside the .s file
403 are not supported. */
404 #define ASM_WEAKEN_DECL(FILE, DECL, NAME, ALIAS) \
408 warning (0, "alias definitions not supported in Mach-O; ignored"); \
412 if (! DECL_EXTERNAL (DECL) && TREE_PUBLIC (DECL)) \
413 targetm.asm_out.globalize_label (FILE, NAME); \
414 if (DECL_EXTERNAL (DECL)) \
415 fputs ("\t.weak_reference ", FILE); \
416 else if (! lookup_attribute ("weak", DECL_ATTRIBUTES (DECL)) \
417 && lookup_attribute ("weak_import", DECL_ATTRIBUTES (DECL))) \
419 else if (TREE_PUBLIC (DECL)) \
420 fputs ("\t.weak_definition ", FILE); \
423 assemble_name (FILE, NAME); \
424 fputc ('\n', FILE); \
427 /* Darwin has the pthread routines in libSystem, which every program
428 links to, so there's no need for weak-ness for that. */
429 #define GTHREAD_USE_WEAK 0
431 /* The Darwin linker imposes two limitations on common symbols: they
432 can't have hidden visibility, and they can't appear in dylibs. As
433 a consequence, we should never use common symbols to represent
435 #undef USE_COMMON_FOR_ONE_ONLY
436 #define USE_COMMON_FOR_ONE_ONLY 0
438 /* The Darwin linker doesn't want coalesced symbols to appear in
439 a static archive's table of contents. */
440 #undef TARGET_WEAK_NOT_IN_ARCHIVE_TOC
441 #define TARGET_WEAK_NOT_IN_ARCHIVE_TOC 1
443 /* On Darwin, we don't (at the time of writing) have linkonce sections
444 with names, so it's safe to make the class data not comdat. */
445 #define TARGET_CXX_CLASS_DATA_ALWAYS_COMDAT hook_bool_void_false
447 /* We make exception information linkonce. */
448 #undef TARGET_USES_WEAK_UNWIND_INFO
449 #define TARGET_USES_WEAK_UNWIND_INFO 1
451 /* We need to use a nonlocal label for the start of an EH frame: the
452 Darwin linker requires that a coalesced section start with a label.
453 Unfortunately, it also requires that 'debug' sections don't contain
455 #undef FRAME_BEGIN_LABEL
456 #define FRAME_BEGIN_LABEL (for_eh ? "EH_frame" : "Lframe")
458 /* Emit a label for the FDE corresponding to DECL. EMPTY means
459 emit a label for an empty FDE. */
460 #define TARGET_ASM_EMIT_UNWIND_LABEL darwin_emit_unwind_label
462 /* Emit a label to separate the exception table. */
463 #define TARGET_ASM_EMIT_EXCEPT_TABLE_LABEL darwin_emit_except_table_label
465 /* Our profiling scheme doesn't LP labels and counter words. */
467 #define NO_PROFILE_COUNTERS 1
469 #undef INIT_SECTION_ASM_OP
470 #define INIT_SECTION_ASM_OP
474 #define TARGET_ASM_CONSTRUCTOR machopic_asm_out_constructor
475 #define TARGET_ASM_DESTRUCTOR machopic_asm_out_destructor
477 /* Always prefix with an underscore. */
479 #define USER_LABEL_PREFIX "_"
481 /* Don't output a .file directive. That is only used by the assembler for
483 #undef TARGET_ASM_FILE_START_FILE_DIRECTIVE
484 #define TARGET_ASM_FILE_START_FILE_DIRECTIVE false
486 #undef TARGET_ASM_FILE_END
487 #define TARGET_ASM_FILE_END darwin_file_end
489 #define ASM_OUTPUT_SKIP(FILE,SIZE) \
490 fprintf (FILE, "\t.space "HOST_WIDE_INT_PRINT_UNSIGNED"\n", SIZE)
492 /* Give ObjC methods pretty symbol names. */
494 #undef OBJC_GEN_METHOD_LABEL
495 #define OBJC_GEN_METHOD_LABEL(BUF,IS_INST,CLASS_NAME,CAT_NAME,SEL_NAME,NUM) \
497 sprintf (BUF, "%c[%s(%s) %s]", (IS_INST) ? '-' : '+', \
498 (CLASS_NAME), (CAT_NAME), (SEL_NAME)); \
500 sprintf (BUF, "%c[%s %s]", (IS_INST) ? '-' : '+', \
501 (CLASS_NAME), (SEL_NAME)); \
504 /* The RTTI data (e.g., __ti4name) is common and public (and static),
505 but it does need to be referenced via indirect PIC data pointers.
506 The machopic_define_symbol calls are telling the machopic subsystem
507 that the name *is* defined in this module, so it doesn't need to
508 make them indirect. */
510 #undef ASM_DECLARE_OBJECT_NAME
511 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL) \
513 const char *xname = NAME; \
514 if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF) \
515 xname = IDENTIFIER_POINTER (DECL_NAME (DECL)); \
516 if (! DECL_WEAK (DECL) \
517 && ((TREE_STATIC (DECL) \
518 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
519 || DECL_INITIAL (DECL))) \
520 machopic_define_symbol (DECL_RTL (DECL)); \
521 if ((TREE_STATIC (DECL) \
522 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
523 || DECL_INITIAL (DECL)) \
524 (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false); \
525 ASM_OUTPUT_LABEL (FILE, xname); \
526 /* Darwin doesn't support zero-size objects, so give them a \
528 if (tree_low_cst (DECL_SIZE_UNIT (DECL), 1) == 0) \
529 assemble_zeros (1); \
532 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
534 const char *xname = NAME; \
535 if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF) \
536 xname = IDENTIFIER_POINTER (DECL_NAME (DECL)); \
537 if (! DECL_WEAK (DECL) \
538 && ((TREE_STATIC (DECL) \
539 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
540 || DECL_INITIAL (DECL))) \
541 machopic_define_symbol (DECL_RTL (DECL)); \
542 if ((TREE_STATIC (DECL) \
543 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
544 || DECL_INITIAL (DECL)) \
545 (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false); \
546 ASM_OUTPUT_LABEL (FILE, xname); \
549 #define ASM_DECLARE_CONSTANT_NAME(FILE, NAME, EXP, SIZE) \
551 ASM_OUTPUT_LABEL (FILE, NAME); \
552 /* Darwin doesn't support zero-size objects, so give them a \
555 assemble_zeros (1); \
558 /* Wrap new method names in quotes so the assembler doesn't gag.
559 Make Objective-C internal symbols local. */
561 #undef ASM_OUTPUT_LABELREF
562 #define ASM_OUTPUT_LABELREF(FILE,NAME) \
564 const char *xname = (NAME); \
565 if (! strcmp (xname, "<pic base>")) \
566 machopic_output_function_base_name(FILE); \
567 else if (xname[0] == '&' || xname[0] == '*') \
569 int len = strlen (xname); \
570 if (len > 6 && !strcmp ("$stub", xname + len - 5)) \
571 machopic_validate_stub_or_non_lazy_ptr (xname); \
572 else if (len > 7 && !strcmp ("$stub\"", xname + len - 6)) \
573 machopic_validate_stub_or_non_lazy_ptr (xname); \
574 else if (len > 14 && !strcmp ("$non_lazy_ptr", xname + len - 13)) \
575 machopic_validate_stub_or_non_lazy_ptr (xname); \
576 else if (len > 15 && !strcmp ("$non_lazy_ptr\"", xname + len - 14)) \
577 machopic_validate_stub_or_non_lazy_ptr (xname); \
578 if (xname[1] != '"' && name_needs_quotes (&xname[1])) \
579 fprintf (FILE, "\"%s\"", &xname[1]); \
581 fputs (&xname[1], FILE); \
583 else if (xname[0] == '+' || xname[0] == '-') \
584 fprintf (FILE, "\"%s\"", xname); \
585 else if (!strncmp (xname, "_OBJC_", 6)) \
586 fprintf (FILE, "L%s", xname); \
587 else if (!strncmp (xname, ".objc_class_name_", 17)) \
588 fprintf (FILE, "%s", xname); \
589 else if (xname[0] != '"' && name_needs_quotes (xname)) \
590 fprintf (FILE, "\"%s\"", xname); \
592 asm_fprintf (FILE, "%U%s", xname); \
595 /* Output before executable code. */
596 #undef TEXT_SECTION_ASM_OP
597 #define TEXT_SECTION_ASM_OP "\t.text"
599 /* Output before writable data. */
601 #undef DATA_SECTION_ASM_OP
602 #define DATA_SECTION_ASM_OP "\t.data"
605 #define ALIGN_ASM_OP ".align"
607 #undef ASM_OUTPUT_ALIGN
608 #define ASM_OUTPUT_ALIGN(FILE,LOG) \
610 fprintf (FILE, "\t%s %d\n", ALIGN_ASM_OP, (LOG))
612 /* Ensure correct alignment of bss data. */
614 #undef ASM_OUTPUT_ALIGNED_DECL_LOCAL
615 #define ASM_OUTPUT_ALIGNED_DECL_LOCAL(FILE, DECL, NAME, SIZE, ALIGN) \
617 unsigned HOST_WIDE_INT _new_size = SIZE; \
618 fputs (".lcomm ", (FILE)); \
619 assemble_name ((FILE), (NAME)); \
620 if (_new_size == 0) _new_size = 1; \
621 fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED",%u\n", _new_size, \
622 floor_log2 ((ALIGN) / BITS_PER_UNIT)); \
623 if ((DECL) && ((TREE_STATIC (DECL) \
624 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
625 || DECL_INITIAL (DECL))) \
627 (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false); \
628 machopic_define_symbol (DECL_RTL (DECL)); \
632 /* The maximum alignment which the object file format can support.
633 For Mach-O, this is 2^15. */
635 #undef MAX_OFILE_ALIGNMENT
636 #define MAX_OFILE_ALIGNMENT 0x8000
638 /* Declare the section variables. */
639 #ifndef USED_FOR_TARGET
640 enum darwin_section_enum {
641 #define DEF_SECTION(NAME, FLAGS, DIRECTIVE, OBJC) NAME,
642 #include "darwin-sections.def"
646 extern GTY(()) section * darwin_sections[NUM_DARWIN_SECTIONS];
649 #undef TARGET_ASM_SELECT_SECTION
650 #define TARGET_ASM_SELECT_SECTION machopic_select_section
651 #define USE_SELECT_SECTION_FOR_FUNCTIONS
653 #undef TARGET_ASM_SELECT_RTX_SECTION
654 #define TARGET_ASM_SELECT_RTX_SECTION machopic_select_rtx_section
655 #undef TARGET_ASM_UNIQUE_SECTION
656 #define TARGET_ASM_UNIQUE_SECTION darwin_unique_section
657 #undef TARGET_ASM_FUNCTION_RODATA_SECTION
658 #define TARGET_ASM_FUNCTION_RODATA_SECTION default_no_function_rodata_section
661 #define ASM_DECLARE_UNRESOLVED_REFERENCE(FILE,NAME) \
664 if (MACHOPIC_INDIRECT) \
665 fprintf (FILE, "\t.lazy_reference "); \
667 fprintf (FILE, "\t.reference "); \
668 assemble_name (FILE, NAME); \
669 fprintf (FILE, "\n"); \
673 #define ASM_DECLARE_CLASS_REFERENCE(FILE,NAME) \
676 fprintf (FILE, "\t"); \
677 assemble_name (FILE, NAME); \
678 fprintf (FILE, "=0\n"); \
679 (*targetm.asm_out.globalize_label) (FILE, NAME); \
683 /* Globalizing directive for a label. */
684 #define GLOBAL_ASM_OP ".globl "
685 #define TARGET_ASM_GLOBALIZE_LABEL darwin_globalize_label
687 /* Emit an assembler directive to set visibility for a symbol. Used
688 to support visibility attribute and Darwin's private extern
690 #undef TARGET_ASM_ASSEMBLE_VISIBILITY
691 #define TARGET_ASM_ASSEMBLE_VISIBILITY darwin_assemble_visibility
693 /* Extra attributes for Darwin. */
694 #define SUBTARGET_ATTRIBUTE_TABLE \
695 /* { name, min_len, max_len, decl_req, type_req, fn_type_req, handler } */ \
696 { "weak_import", 0, 0, true, false, false, \
697 darwin_handle_weak_import_attribute }
699 #undef ASM_GENERATE_INTERNAL_LABEL
700 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM) \
701 sprintf (LABEL, "*%s%ld", PREFIX, (long)(NUM))
703 #undef TARGET_ASM_MARK_DECL_PRESERVED
704 #define TARGET_ASM_MARK_DECL_PRESERVED darwin_mark_decl_preserved
706 /* Set on a symbol with SYMBOL_FLAG_FUNCTION or
707 MACHO_SYMBOL_FLAG_VARIABLE to indicate that the function or
708 variable has been defined in this translation unit.
709 When porting Mach-O to new architectures you need to make
710 sure these aren't clobbered by the backend. */
712 #define MACHO_SYMBOL_FLAG_VARIABLE (SYMBOL_FLAG_MACH_DEP)
713 #define MACHO_SYMBOL_FLAG_DEFINED ((SYMBOL_FLAG_MACH_DEP) << 1)
715 /* Set on a symbol to indicate when fix-and-continue style code
716 generation is being used and the symbol refers to a static symbol
717 that should be rebound from new instances of a translation unit to
718 the original instance of the data. */
720 #define MACHO_SYMBOL_STATIC ((SYMBOL_FLAG_MACH_DEP) << 2)
722 /* Symbolic names for various things we might know about a symbol. */
724 enum machopic_addr_class {
726 MACHOPIC_DEFINED_DATA,
727 MACHOPIC_UNDEFINED_DATA,
728 MACHOPIC_DEFINED_FUNCTION,
729 MACHOPIC_UNDEFINED_FUNCTION
732 /* Macros defining the various PIC cases. */
734 #define MACHO_DYNAMIC_NO_PIC_P (TARGET_DYNAMIC_NO_PIC)
735 #define MACHOPIC_INDIRECT (flag_pic || MACHO_DYNAMIC_NO_PIC_P)
736 #define MACHOPIC_JUST_INDIRECT (MACHO_DYNAMIC_NO_PIC_P)
737 #define MACHOPIC_PURE (flag_pic && ! MACHO_DYNAMIC_NO_PIC_P)
739 #undef TARGET_ENCODE_SECTION_INFO
740 #define TARGET_ENCODE_SECTION_INFO darwin_encode_section_info
741 #undef TARGET_STRIP_NAME_ENCODING
742 #define TARGET_STRIP_NAME_ENCODING default_strip_name_encoding
744 #define GEN_BINDER_NAME_FOR_STUB(BUF,STUB,STUB_LENGTH) \
746 const char *const stub_ = (STUB); \
747 char *buffer_ = (BUF); \
748 strcpy (buffer_, stub_); \
749 if (stub_[0] == '"') \
751 strcpy (buffer_ + (STUB_LENGTH) - 1, "_binder\""); \
755 strcpy (buffer_ + (STUB_LENGTH), "_binder"); \
759 #define GEN_SYMBOL_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH) \
761 const char *const symbol_ = (SYMBOL); \
762 char *buffer_ = (BUF); \
763 if (name_needs_quotes (symbol_) && symbol_[0] != '"') \
765 sprintf (buffer_, "\"%s\"", symbol_); \
769 strcpy (buffer_, symbol_); \
773 /* Given a symbol name string, create the lazy pointer version
774 of the symbol name. */
776 #define GEN_LAZY_PTR_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH) \
778 const char *symbol_ = (SYMBOL); \
779 char *buffer_ = (BUF); \
780 if (symbol_[0] == '"') \
782 strcpy (buffer_, "\"L"); \
783 strcpy (buffer_ + 2, symbol_ + 1); \
784 strcpy (buffer_ + (SYMBOL_LENGTH), "$lazy_ptr\""); \
786 else if (name_needs_quotes (symbol_)) \
788 strcpy (buffer_, "\"L"); \
789 strcpy (buffer_ + 2, symbol_); \
790 strcpy (buffer_ + (SYMBOL_LENGTH) + 2, "$lazy_ptr\""); \
794 strcpy (buffer_, "L"); \
795 strcpy (buffer_ + 1, symbol_); \
796 strcpy (buffer_ + (SYMBOL_LENGTH) + 1, "$lazy_ptr"); \
800 #define EH_FRAME_SECTION_NAME "__TEXT"
801 #define EH_FRAME_SECTION_ATTR ",coalesced,no_toc+strip_static_syms+live_support"
803 /* Java runtime class list. */
804 #define JCR_SECTION_NAME "__DATA,jcr,regular,no_dead_strip"
806 #undef ASM_PREFERRED_EH_DATA_FORMAT
807 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL) \
808 (((CODE) == 2 && (GLOBAL) == 1) \
809 ? (DW_EH_PE_pcrel | DW_EH_PE_indirect | DW_EH_PE_sdata4) : \
810 ((CODE) == 1 || (GLOBAL) == 0) ? DW_EH_PE_pcrel : DW_EH_PE_absptr)
812 #define ASM_OUTPUT_DWARF_DELTA(FILE,SIZE,LABEL1,LABEL2) \
813 darwin_asm_output_dwarf_delta (FILE, SIZE, LABEL1, LABEL2)
815 #define ASM_OUTPUT_DWARF_OFFSET(FILE,SIZE,LABEL,BASE) \
816 darwin_asm_output_dwarf_offset (FILE, SIZE, LABEL, BASE)
818 #define ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX(ASM_OUT_FILE, ENCODING, SIZE, ADDR, DONE) \
819 if (ENCODING == ASM_PREFERRED_EH_DATA_FORMAT (2, 1)) { \
820 darwin_non_lazy_pcrel (ASM_OUT_FILE, ADDR); \
824 /* Experimentally, putting jump tables in text is faster on SPEC.
825 Also this is needed for correctness for coalesced functions. */
827 #ifndef JUMP_TABLES_IN_TEXT_SECTION
828 #define JUMP_TABLES_IN_TEXT_SECTION 1
831 #define TARGET_TERMINATE_DW2_EH_FRAME_INFO false
833 #define TARGET_ASM_INIT_SECTIONS darwin_init_sections
834 #undef TARGET_ASM_NAMED_SECTION
835 #define TARGET_ASM_NAMED_SECTION darwin_asm_named_section
837 /* Handle pragma weak and pragma pack. */
838 #define HANDLE_SYSV_PRAGMA 1
840 #define DARWIN_REGISTER_TARGET_PRAGMAS() \
842 c_register_pragma (0, "mark", darwin_pragma_ignore); \
843 c_register_pragma (0, "options", darwin_pragma_options); \
844 c_register_pragma (0, "segment", darwin_pragma_ignore); \
845 c_register_pragma (0, "unused", darwin_pragma_unused); \
846 c_register_pragma (0, "ms_struct", darwin_pragma_ms_struct); \
850 #define ASM_APP_ON ""
852 #define ASM_APP_OFF ""
854 void darwin_register_frameworks (const char *, const char *, int);
855 void darwin_register_objc_includes (const char *, const char *, int);
856 #define TARGET_EXTRA_PRE_INCLUDES darwin_register_objc_includes
857 #define TARGET_EXTRA_INCLUDES darwin_register_frameworks
859 void add_framework_path (char *);
860 #define TARGET_OPTF add_framework_path
862 #define TARGET_POSIX_IO
864 /* All new versions of Darwin have C99 functions. */
866 #define TARGET_C99_FUNCTIONS 1
868 #define WINT_TYPE "int"
870 /* Every program on darwin links against libSystem which contains the pthread
871 routines, so there's no need to explicitly call out when doing threaded
874 #undef GOMP_SELF_SPECS
875 #define GOMP_SELF_SPECS ""
877 /* Darwin can't support anchors until we can cope with the adjustments
878 to size that ASM_DECLARE_OBJECT_NAME and ASM_DECLARE_CONSTANT_NAME
879 when outputting members of an anchor block and the linker can be
880 taught to keep them together or we find some other suitable
881 code-gen technique. */
884 #define TARGET_ASM_OUTPUT_ANCHOR darwin_asm_output_anchor
886 #define TARGET_ASM_OUTPUT_ANCHOR NULL
889 /* Attempt to turn on execute permission for the stack. This may be
890 used by INITIALIZE_TRAMPOLINE of the target needs it (that is,
891 if the target machine can change execute permissions on a page).
893 There is no way to query the execute permission of the stack, so
894 we always issue the mprotect() call.
896 Unfortunately it is not possible to make this namespace-clean.
898 Also note that no errors should be emitted by this code; it is
899 considered dangerous for library calls to send messages to
902 #define ENABLE_EXECUTE_STACK \
903 extern void __enable_execute_stack (void *); \
905 __enable_execute_stack (void *addr) \
907 extern int mprotect (void *, size_t, int); \
908 extern int getpagesize (void); \
916 size = getpagesize(); \
917 mask = ~((long) size - 1); \
920 page = (char *) (((long) addr) & mask); \
921 end = (char *) ((((long) (addr + (TARGET_64BIT ? 48 : 40))) & mask) + size); \
923 /* 7 == PROT_READ | PROT_WRITE | PROT_EXEC */ \
924 (void) mprotect (page, end - page, 7); \
927 #endif /* CONFIG_DARWIN_H */