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 { "-fapple-kext", "-fapple-kext -static -Wa,-static" }, \
131 { "-filelist", "-Xlinker -filelist -Xlinker" }, \
132 { "-findirect-virtual-calls", "-fapple-kext" }, \
133 { "-flat_namespace", "-Zflat_namespace" }, \
134 { "-force_cpusubtype_ALL", "-Zforce_cpusubtype_ALL" }, \
135 { "-force_flat_namespace", "-Zforce_flat_namespace" }, \
136 { "-framework", "-Xlinker -framework -Xlinker" }, \
137 { "-fterminated-vtables", "-fapple-kext" }, \
138 { "-image_base", "-Zimage_base" }, \
139 { "-init", "-Zinit" }, \
140 { "-install_name", "-Zinstall_name" }, \
141 { "-mkernel", "-mkernel -static -Wa,-static" }, \
142 { "-multiply_defined_unused", "-Zmultiplydefinedunused" }, \
143 { "-multiply_defined", "-Zmultiply_defined" }, \
144 { "-multi_module", "-Zmulti_module" }, \
145 { "-static", "-static -Wa,-static" }, \
146 { "-single_module", "-Zsingle_module" }, \
147 { "-unexported_symbols_list", "-Zunexported_symbols_list" }, \
148 SUBTARGET_OPTION_TRANSLATE_TABLE
150 #define SUBSUBTARGET_OVERRIDE_OPTIONS \
152 darwin_override_options (); \
155 /* These compiler options take n arguments. */
157 #undef WORD_SWITCH_TAKES_ARG
158 #define WORD_SWITCH_TAKES_ARG(STR) \
159 (DEFAULT_WORD_SWITCH_TAKES_ARG (STR) ? 1 : \
160 !strcmp (STR, "Zallowable_client") ? 1 : \
161 !strcmp (STR, "arch") ? 1 : \
162 !strcmp (STR, "arch_only") ? 1 : \
163 !strcmp (STR, "Zbundle_loader") ? 1 : \
164 !strcmp (STR, "client_name") ? 1 : \
165 !strcmp (STR, "compatibility_version") ? 1 : \
166 !strcmp (STR, "current_version") ? 1 : \
167 !strcmp (STR, "Zdylib_file") ? 1 : \
168 !strcmp (STR, "Zexported_symbols_list") ? 1 : \
169 !strcmp (STR, "Zimage_base") ? 1 : \
170 !strcmp (STR, "Zinit") ? 1 : \
171 !strcmp (STR, "Zinstall_name") ? 1 : \
172 !strcmp (STR, "Zmultiplydefinedunused") ? 1 : \
173 !strcmp (STR, "Zmultiply_defined") ? 1 : \
174 !strcmp (STR, "precomp-trustfile") ? 1 : \
175 !strcmp (STR, "read_only_relocs") ? 1 : \
176 !strcmp (STR, "sectcreate") ? 3 : \
177 !strcmp (STR, "sectorder") ? 3 : \
178 !strcmp (STR, "Zsegaddr") ? 2 : \
179 !strcmp (STR, "Zsegs_read_only_addr") ? 1 : \
180 !strcmp (STR, "Zsegs_read_write_addr") ? 1 : \
181 !strcmp (STR, "Zseg_addr_table") ? 1 : \
182 !strcmp (STR, "Zfn_seg_addr_table_filename") ? 1 :\
183 !strcmp (STR, "seg1addr") ? 1 : \
184 !strcmp (STR, "segprot") ? 3 : \
185 !strcmp (STR, "sub_library") ? 1 : \
186 !strcmp (STR, "sub_umbrella") ? 1 : \
187 !strcmp (STR, "umbrella") ? 1 : \
188 !strcmp (STR, "undefined") ? 1 : \
189 !strcmp (STR, "Zunexported_symbols_list") ? 1 : \
190 !strcmp (STR, "Zweak_reference_mismatches") ? 1 : \
191 !strcmp (STR, "pagezero_size") ? 1 : \
192 !strcmp (STR, "segs_read_only_addr") ? 1 : \
193 !strcmp (STR, "segs_read_write_addr") ? 1 : \
194 !strcmp (STR, "sectalign") ? 3 : \
195 !strcmp (STR, "sectobjectsymbols") ? 2 : \
196 !strcmp (STR, "segcreate") ? 3 : \
197 !strcmp (STR, "dylinker_install_name") ? 1 : \
200 #define SUBTARGET_C_COMMON_OVERRIDE_OPTIONS do { \
201 if (flag_mkernel || flag_apple_kext) \
203 if (flag_use_cxa_atexit == 2) \
204 flag_use_cxa_atexit = 0; \
205 /* kexts should always be built without the coalesced sections \
206 because the kernel loader doesn't grok such sections. */ \
208 /* No RTTI in kexts. */ \
213 /* Machine dependent cpp options. Don't add more options here, add
214 them to darwin_cpp_builtins in darwin-c.c. */
217 #define CPP_SPEC "%{static:%{!dynamic:-D__STATIC__}}%{!static:-D__DYNAMIC__}" \
218 " %{pthread:-D_REENTRANT}"
220 /* This is mostly a clone of the standard LINK_COMMAND_SPEC, plus
221 precomp, libtool, and fat build additions. Also we
222 don't specify a second %G after %L because libSystem is
223 self-contained and doesn't need to link against libgcc.a. */
224 /* In general, random Darwin linker flags should go into LINK_SPEC
225 instead of LINK_COMMAND_SPEC. The command spec is better for
226 specifying the handling of options understood by generic Unix
227 linkers, and for positional arguments like libraries. */
228 #define LINK_COMMAND_SPEC "\
229 %{!fdump=*:%{!fsyntax-only:%{!precomp:%{!c:%{!M:%{!MM:%{!E:%{!S:\
230 %{!Zdynamiclib:%(linker)}%{Zdynamiclib:/usr/bin/libtool} \
231 %l %X %{d} %{s} %{t} %{Z} \
232 %{!Zdynamiclib:%{A} %{e*} %{m} %{N} %{n} %{r} %{u*} %{x} %{z}} \
233 %{@:-o %f%u.out}%{!@:%{o*}%{!o:-o a.out}} \
234 %{!A:%{!nostdlib:%{!nostartfiles:%S}}} \
235 %{L*} %{fopenmp:%:include(libgomp.spec)%(link_gomp)} \
236 %(link_libgcc) %o %{fprofile-arcs|fprofile-generate|coverage:-lgcov} \
237 %{!nostdlib:%{!nodefaultlibs:%(link_ssp) %G %L}} \
238 %{!A:%{!nostdlib:%{!nostartfiles:%E}}} %{T*} %{F*} }}}}}}}}"
240 #ifdef TARGET_SYSTEM_ROOT
241 #define LINK_SYSROOT_SPEC \
242 "%{isysroot*:-syslibroot %*;:-syslibroot " TARGET_SYSTEM_ROOT "}"
244 #define LINK_SYSROOT_SPEC "%{isysroot*:-syslibroot %*}"
247 /* Please keep the random linker options in alphabetical order (modulo
248 'Z' and 'no' prefixes). Options that can only go to one of libtool
249 or ld must be listed twice, under both !Zdynamiclib and
250 Zdynamiclib, with one of the cases reporting an error. */
251 /* Note that options taking arguments may appear multiple times on a
252 command line with different arguments each time, so put a * after
253 their names so all of them get passed. */
255 "%{static}%{!static:-dynamic} \
256 %{fgnu-runtime:%:replace-outfile(-lobjc -lobjc-gnu)}\
258 %{Zforce_cpusubtype_ALL:-arch %(darwin_arch) -force_cpusubtype_ALL} \
259 %{!Zforce_cpusubtype_ALL:-arch %(darwin_subarch)} \
261 %{Zbundle_loader*:-bundle_loader %*} \
263 %{compatibility_version*:%e-compatibility_version only allowed with -dynamiclib\
265 %{current_version*:%e-current_version only allowed with -dynamiclib} \
266 %{Zforce_flat_namespace:-force_flat_namespace} \
267 %{Zinstall_name*:%e-install_name only allowed with -dynamiclib} \
268 %{keep_private_externs} \
272 %{Zbundle:%e-bundle not allowed with -dynamiclib} \
273 %{Zbundle_loader*:%e-bundle_loader not allowed with -dynamiclib} \
274 %{client_name*:%e-client_name not allowed with -dynamiclib} \
275 %{compatibility_version*} \
276 %{current_version*} \
277 %{Zforce_cpusubtype_ALL:-arch_only %(darwin_arch)} \
278 %{!Zforce_cpusubtype_ALL: -arch_only %(darwin_subarch)} \
279 %{Zforce_flat_namespace:%e-force_flat_namespace not allowed with -dynamiclib} \
280 %{Zinstall_name*:-install_name %*} \
281 %{keep_private_externs:%e-keep_private_externs not allowed with -dynamiclib} \
282 %{private_bundle:%e-private_bundle not allowed with -dynamiclib} \
284 %{Zall_load:-all_load}%{Zdynamiclib:%{!Zall_load:-noall_load}} \
285 %{Zallowable_client*:-allowable_client %*} \
286 %{Zbind_at_load:-bind_at_load} \
287 %{Zarch_errors_fatal:-arch_errors_fatal} \
288 %{Zdead_strip:-dead_strip} \
289 %{Zno_dead_strip_inits_and_terms:-no_dead_strip_inits_and_terms} \
290 %{Zdylib_file*:-dylib_file %*} \
291 %{Zdynamic:-dynamic}\
292 %{Zexported_symbols_list*:-exported_symbols_list %*} \
293 %{Zflat_namespace:-flat_namespace} \
294 %{headerpad_max_install_names*} \
295 %{Zimage_base*:-image_base %*} \
297 %{mmacosx-version-min=*:-macosx_version_min %*} \
298 %{!mmacosx-version-min=*:%{shared-libgcc:-macosx_version_min 10.3}} \
300 %{Zmulti_module:-multi_module} %{Zsingle_module:-single_module} \
301 %{Zmultiply_defined*:-multiply_defined %*} \
302 %{!Zmultiply_defined*:%{shared-libgcc: \
303 %:version-compare(< 10.5 mmacosx-version-min= -multiply_defined) \
304 %:version-compare(< 10.5 mmacosx-version-min= suppress)}} \
305 %{Zmultiplydefinedunused*:-multiply_defined_unused %*} \
306 %{prebind} %{noprebind} %{nofixprebinding} %{prebind_all_twolevel_modules} \
307 %{read_only_relocs} \
308 %{sectcreate*} %{sectorder*} %{seg1addr*} %{segprot*} \
309 %{Zsegaddr*:-segaddr %*} \
310 %{Zsegs_read_only_addr*:-segs_read_only_addr %*} \
311 %{Zsegs_read_write_addr*:-segs_read_write_addr %*} \
312 %{Zseg_addr_table*: -seg_addr_table %*} \
313 %{Zfn_seg_addr_table_filename*:-seg_addr_table_filename %*} \
314 %{sub_library*} %{sub_umbrella*} \
315 " LINK_SYSROOT_SPEC " \
316 %{twolevel_namespace} %{twolevel_namespace_hints} \
319 %{Zunexported_symbols_list*:-unexported_symbols_list %*} \
320 %{Zweak_reference_mismatches*:-weak_reference_mismatches %*} \
321 %{!Zweak_reference_mismatches*:-weak_reference_mismatches non-weak} \
325 %{pagezero_size*} %{segs_read_*} %{seglinkedit} %{noseglinkedit} \
326 %{sectalign*} %{sectobjectsymbols*} %{segcreate*} %{whyload} \
327 %{whatsloaded} %{dylinker_install_name*} \
328 %{dylinker} %{Mach} "
331 /* Machine dependent libraries. */
333 #define LIB_SPEC "%{!static:-lSystem}"
335 /* Support -mmacosx-version-min by supplying different (stub) libgcc_s.dylib
336 libraries to link against, and by not linking against libgcc_s on
339 Note that by default, -lgcc_eh is not linked against! This is
340 because in a future version of Darwin the EH frame information may
341 be in a new format, or the fallback routine might be changed; if
342 you want to explicitly link against the static version of those
343 routines, because you know you don't need to unwind through system
344 libraries, you need to explicitly say -static-libgcc.
346 If it is linked against, it has to be before -lgcc, because it may
347 need symbols from -lgcc. */
348 #undef REAL_LIBGCC_SPEC
349 #define REAL_LIBGCC_SPEC \
350 "%{static-libgcc|static: -lgcc_eh -lgcc; \
351 shared-libgcc|fexceptions|fgnu-runtime: \
352 %:version-compare(!> 10.5 mmacosx-version-min= -lgcc_s.10.4) \
353 %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_s.10.5) \
355 :%:version-compare(>< 10.3.9 10.5 mmacosx-version-min= -lgcc_s.10.4) \
356 %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_s.10.5) \
359 /* We specify crt0.o as -lcrt0.o so that ld will search the library path.
361 crt3.o provides __cxa_atexit on systems that don't have it. Since
362 it's only used with C++, which requires passing -shared-libgcc, key
363 off that to avoid unnecessarily adding a destructor to every
364 powerpc program built. */
366 #undef STARTFILE_SPEC
367 #define STARTFILE_SPEC \
368 "%{!Zdynamiclib:%{Zbundle:%{!static:-lbundle1.o}} \
369 %{!Zbundle:%{pg:%{static:-lgcrt0.o} \
370 %{!static:%{object:-lgcrt0.o} \
371 %{!object:%{preload:-lgcrt0.o} \
372 %{!preload:-lgcrt1.o %(darwin_crt2)}}}} \
373 %{!pg:%{static:-lcrt0.o} \
374 %{!static:%{object:-lcrt0.o} \
375 %{!object:%{preload:-lcrt0.o} \
376 %{!preload:-lcrt1.o %(darwin_crt2)}}}}}} \
377 %{shared-libgcc:%:version-compare(< 10.5 mmacosx-version-min= crt3.o%s)}"
379 /* The native Darwin linker doesn't necessarily place files in the order
380 that they're specified on the link line. Thus, it is pointless
381 to put anything in ENDFILE_SPEC. */
382 /* #define ENDFILE_SPEC "" */
384 /* Default Darwin ASM_SPEC, very simple. */
385 #define ASM_SPEC "-arch %(darwin_arch) \
386 %{Zforce_cpusubtype_ALL:-force_cpusubtype_ALL}"
388 /* We use Dbx symbol format. */
390 #define DBX_DEBUGGING_INFO 1
392 /* Also enable Dwarf 2 as an option. */
393 #define DWARF2_DEBUGGING_INFO
394 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
396 #define DEBUG_FRAME_SECTION "__DWARF,__debug_frame,regular,debug"
397 #define DEBUG_INFO_SECTION "__DWARF,__debug_info,regular,debug"
398 #define DEBUG_ABBREV_SECTION "__DWARF,__debug_abbrev,regular,debug"
399 #define DEBUG_ARANGES_SECTION "__DWARF,__debug_aranges,regular,debug"
400 #define DEBUG_MACINFO_SECTION "__DWARF,__debug_macinfo,regular,debug"
401 #define DEBUG_LINE_SECTION "__DWARF,__debug_line,regular,debug"
402 #define DEBUG_LOC_SECTION "__DWARF,__debug_loc,regular,debug"
403 #define DEBUG_PUBNAMES_SECTION "__DWARF,__debug_pubnames,regular,debug"
404 #define DEBUG_PUBTYPES_SECTION "__DWARF,__debug_pubtypes,regular,debug"
405 #define DEBUG_STR_SECTION "__DWARF,__debug_str,regular,debug"
406 #define DEBUG_RANGES_SECTION "__DWARF,__debug_ranges,regular,debug"
408 /* When generating stabs debugging, use N_BINCL entries. */
410 #define DBX_USE_BINCL
412 /* There is no limit to the length of stabs strings. */
414 #define DBX_CONTIN_LENGTH 0
416 /* gdb needs a null N_SO at the end of each file for scattered loading. */
418 #define DBX_OUTPUT_NULL_N_SO_AT_MAIN_SOURCE_FILE_END
420 /* GCC's definition of 'one_only' is the same as its definition of 'weak'. */
421 #define MAKE_DECL_ONE_ONLY(DECL) (DECL_WEAK (DECL) = 1)
423 /* Mach-O supports 'weak imports', and 'weak definitions' in coalesced
424 sections. machopic_select_section ensures that weak variables go in
425 coalesced sections. Weak aliases (or any other kind of aliases) are
426 not supported. Weak symbols that aren't visible outside the .s file
427 are not supported. */
428 #define ASM_WEAKEN_DECL(FILE, DECL, NAME, ALIAS) \
432 warning (0, "alias definitions not supported in Mach-O; ignored"); \
436 if (! DECL_EXTERNAL (DECL) && TREE_PUBLIC (DECL)) \
437 targetm.asm_out.globalize_label (FILE, NAME); \
438 if (DECL_EXTERNAL (DECL)) \
439 fputs ("\t.weak_reference ", FILE); \
440 else if (! lookup_attribute ("weak", DECL_ATTRIBUTES (DECL)) \
441 && lookup_attribute ("weak_import", DECL_ATTRIBUTES (DECL))) \
443 else if (TREE_PUBLIC (DECL)) \
444 fputs ("\t.weak_definition ", FILE); \
447 assemble_name (FILE, NAME); \
448 fputc ('\n', FILE); \
451 /* Darwin has the pthread routines in libSystem, which every program
452 links to, so there's no need for weak-ness for that. */
453 #define GTHREAD_USE_WEAK 0
455 /* The Darwin linker imposes two limitations on common symbols: they
456 can't have hidden visibility, and they can't appear in dylibs. As
457 a consequence, we should never use common symbols to represent
459 #undef USE_COMMON_FOR_ONE_ONLY
460 #define USE_COMMON_FOR_ONE_ONLY 0
462 /* The Darwin linker doesn't want coalesced symbols to appear in
463 a static archive's table of contents. */
464 #undef TARGET_WEAK_NOT_IN_ARCHIVE_TOC
465 #define TARGET_WEAK_NOT_IN_ARCHIVE_TOC 1
467 /* On Darwin, we don't (at the time of writing) have linkonce sections
468 with names, so it's safe to make the class data not comdat. */
469 #define TARGET_CXX_CLASS_DATA_ALWAYS_COMDAT hook_bool_void_false
471 /* For efficiency, on Darwin the RTTI information that is always
472 emitted in the standard C++ library should not be COMDAT. */
473 #define TARGET_CXX_LIBRARY_RTTI_COMDAT hook_bool_void_false
475 /* We make exception information linkonce. */
476 #undef TARGET_USES_WEAK_UNWIND_INFO
477 #define TARGET_USES_WEAK_UNWIND_INFO 1
479 /* We need to use a nonlocal label for the start of an EH frame: the
480 Darwin linker requires that a coalesced section start with a label.
481 Unfortunately, it also requires that 'debug' sections don't contain
483 #undef FRAME_BEGIN_LABEL
484 #define FRAME_BEGIN_LABEL (for_eh ? "EH_frame" : "Lframe")
486 /* Emit a label for the FDE corresponding to DECL. EMPTY means
487 emit a label for an empty FDE. */
488 #define TARGET_ASM_EMIT_UNWIND_LABEL darwin_emit_unwind_label
490 /* Emit a label to separate the exception table. */
491 #define TARGET_ASM_EMIT_EXCEPT_TABLE_LABEL darwin_emit_except_table_label
493 /* Our profiling scheme doesn't LP labels and counter words. */
495 #define NO_PROFILE_COUNTERS 1
497 #undef INIT_SECTION_ASM_OP
498 #define INIT_SECTION_ASM_OP
502 #define TARGET_ASM_CONSTRUCTOR machopic_asm_out_constructor
503 #define TARGET_ASM_DESTRUCTOR machopic_asm_out_destructor
505 /* Always prefix with an underscore. */
507 #define USER_LABEL_PREFIX "_"
509 /* Don't output a .file directive. That is only used by the assembler for
511 #undef TARGET_ASM_FILE_START_FILE_DIRECTIVE
512 #define TARGET_ASM_FILE_START_FILE_DIRECTIVE false
514 #undef TARGET_ASM_FILE_END
515 #define TARGET_ASM_FILE_END darwin_file_end
517 #define ASM_OUTPUT_SKIP(FILE,SIZE) \
518 fprintf (FILE, "\t.space "HOST_WIDE_INT_PRINT_UNSIGNED"\n", SIZE)
520 /* Give ObjC methods pretty symbol names. */
522 #undef OBJC_GEN_METHOD_LABEL
523 #define OBJC_GEN_METHOD_LABEL(BUF,IS_INST,CLASS_NAME,CAT_NAME,SEL_NAME,NUM) \
525 sprintf (BUF, "%c[%s(%s) %s]", (IS_INST) ? '-' : '+', \
526 (CLASS_NAME), (CAT_NAME), (SEL_NAME)); \
528 sprintf (BUF, "%c[%s %s]", (IS_INST) ? '-' : '+', \
529 (CLASS_NAME), (SEL_NAME)); \
532 /* The RTTI data (e.g., __ti4name) is common and public (and static),
533 but it does need to be referenced via indirect PIC data pointers.
534 The machopic_define_symbol calls are telling the machopic subsystem
535 that the name *is* defined in this module, so it doesn't need to
536 make them indirect. */
538 #undef ASM_DECLARE_OBJECT_NAME
539 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL) \
541 const char *xname = NAME; \
542 if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF) \
543 xname = IDENTIFIER_POINTER (DECL_NAME (DECL)); \
544 if (! DECL_WEAK (DECL) \
545 && ((TREE_STATIC (DECL) \
546 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
547 || DECL_INITIAL (DECL))) \
548 machopic_define_symbol (DECL_RTL (DECL)); \
549 if ((TREE_STATIC (DECL) \
550 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
551 || DECL_INITIAL (DECL)) \
552 (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false); \
553 ASM_OUTPUT_LABEL (FILE, xname); \
554 /* Darwin doesn't support zero-size objects, so give them a \
556 if (tree_low_cst (DECL_SIZE_UNIT (DECL), 1) == 0) \
557 assemble_zeros (1); \
560 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
562 const char *xname = NAME; \
563 if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF) \
564 xname = IDENTIFIER_POINTER (DECL_NAME (DECL)); \
565 if (! DECL_WEAK (DECL) \
566 && ((TREE_STATIC (DECL) \
567 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
568 || DECL_INITIAL (DECL))) \
569 machopic_define_symbol (DECL_RTL (DECL)); \
570 if ((TREE_STATIC (DECL) \
571 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
572 || DECL_INITIAL (DECL)) \
573 (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false); \
574 ASM_OUTPUT_LABEL (FILE, xname); \
577 #define ASM_DECLARE_CONSTANT_NAME(FILE, NAME, EXP, SIZE) \
579 ASM_OUTPUT_LABEL (FILE, NAME); \
580 /* Darwin doesn't support zero-size objects, so give them a \
583 assemble_zeros (1); \
586 /* Wrap new method names in quotes so the assembler doesn't gag.
587 Make Objective-C internal symbols local. */
589 #undef ASM_OUTPUT_LABELREF
590 #define ASM_OUTPUT_LABELREF(FILE,NAME) \
592 const char *xname = (NAME); \
593 if (! strcmp (xname, "<pic base>")) \
594 machopic_output_function_base_name(FILE); \
595 else if (xname[0] == '&' || xname[0] == '*') \
597 int len = strlen (xname); \
598 if (len > 6 && !strcmp ("$stub", xname + len - 5)) \
599 machopic_validate_stub_or_non_lazy_ptr (xname); \
600 else if (len > 7 && !strcmp ("$stub\"", xname + len - 6)) \
601 machopic_validate_stub_or_non_lazy_ptr (xname); \
602 else if (len > 14 && !strcmp ("$non_lazy_ptr", xname + len - 13)) \
603 machopic_validate_stub_or_non_lazy_ptr (xname); \
604 else if (len > 15 && !strcmp ("$non_lazy_ptr\"", xname + len - 14)) \
605 machopic_validate_stub_or_non_lazy_ptr (xname); \
606 if (xname[1] != '"' && name_needs_quotes (&xname[1])) \
607 fprintf (FILE, "\"%s\"", &xname[1]); \
609 fputs (&xname[1], FILE); \
611 else if (xname[0] == '+' || xname[0] == '-') \
612 fprintf (FILE, "\"%s\"", xname); \
613 else if (!strncmp (xname, "_OBJC_", 6)) \
614 fprintf (FILE, "L%s", xname); \
615 else if (!strncmp (xname, ".objc_class_name_", 17)) \
616 fprintf (FILE, "%s", xname); \
617 else if (xname[0] != '"' && name_needs_quotes (xname)) \
618 fprintf (FILE, "\"%s\"", xname); \
620 asm_fprintf (FILE, "%U%s", xname); \
623 /* Output before executable code. */
624 #undef TEXT_SECTION_ASM_OP
625 #define TEXT_SECTION_ASM_OP "\t.text"
627 /* Output before writable data. */
629 #undef DATA_SECTION_ASM_OP
630 #define DATA_SECTION_ASM_OP "\t.data"
633 #define ALIGN_ASM_OP ".align"
635 #undef ASM_OUTPUT_ALIGN
636 #define ASM_OUTPUT_ALIGN(FILE,LOG) \
638 fprintf (FILE, "\t%s %d\n", ALIGN_ASM_OP, (LOG))
640 /* Ensure correct alignment of bss data. */
642 #undef ASM_OUTPUT_ALIGNED_DECL_LOCAL
643 #define ASM_OUTPUT_ALIGNED_DECL_LOCAL(FILE, DECL, NAME, SIZE, ALIGN) \
645 unsigned HOST_WIDE_INT _new_size = SIZE; \
646 fputs (".lcomm ", (FILE)); \
647 assemble_name ((FILE), (NAME)); \
648 if (_new_size == 0) _new_size = 1; \
649 fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED",%u\n", _new_size, \
650 floor_log2 ((ALIGN) / BITS_PER_UNIT)); \
651 if ((DECL) && ((TREE_STATIC (DECL) \
652 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
653 || DECL_INITIAL (DECL))) \
655 (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false); \
656 machopic_define_symbol (DECL_RTL (DECL)); \
660 /* The maximum alignment which the object file format can support in
661 bits. For Mach-O, this is 2^15 bytes. */
663 #undef MAX_OFILE_ALIGNMENT
664 #define MAX_OFILE_ALIGNMENT (0x8000 * 8)
666 /* Declare the section variables. */
667 #ifndef USED_FOR_TARGET
668 enum darwin_section_enum {
669 #define DEF_SECTION(NAME, FLAGS, DIRECTIVE, OBJC) NAME,
670 #include "darwin-sections.def"
674 extern GTY(()) section * darwin_sections[NUM_DARWIN_SECTIONS];
677 #undef TARGET_ASM_SELECT_SECTION
678 #define TARGET_ASM_SELECT_SECTION machopic_select_section
679 #define USE_SELECT_SECTION_FOR_FUNCTIONS
681 #undef TARGET_ASM_SELECT_RTX_SECTION
682 #define TARGET_ASM_SELECT_RTX_SECTION machopic_select_rtx_section
683 #undef TARGET_ASM_UNIQUE_SECTION
684 #define TARGET_ASM_UNIQUE_SECTION darwin_unique_section
685 #undef TARGET_ASM_FUNCTION_RODATA_SECTION
686 #define TARGET_ASM_FUNCTION_RODATA_SECTION default_no_function_rodata_section
687 #undef TARGET_ASM_RELOC_RW_MASK
688 #define TARGET_ASM_RELOC_RW_MASK machopic_reloc_rw_mask
691 #define ASM_DECLARE_UNRESOLVED_REFERENCE(FILE,NAME) \
694 if (MACHOPIC_INDIRECT) \
695 fprintf (FILE, "\t.lazy_reference "); \
697 fprintf (FILE, "\t.reference "); \
698 assemble_name (FILE, NAME); \
699 fprintf (FILE, "\n"); \
703 #define ASM_DECLARE_CLASS_REFERENCE(FILE,NAME) \
706 fprintf (FILE, "\t"); \
707 assemble_name (FILE, NAME); \
708 fprintf (FILE, "=0\n"); \
709 (*targetm.asm_out.globalize_label) (FILE, NAME); \
713 /* Globalizing directive for a label. */
714 #define GLOBAL_ASM_OP ".globl "
715 #define TARGET_ASM_GLOBALIZE_LABEL darwin_globalize_label
717 /* Emit an assembler directive to set visibility for a symbol. Used
718 to support visibility attribute and Darwin's private extern
720 #undef TARGET_ASM_ASSEMBLE_VISIBILITY
721 #define TARGET_ASM_ASSEMBLE_VISIBILITY darwin_assemble_visibility
723 /* Extra attributes for Darwin. */
724 #define SUBTARGET_ATTRIBUTE_TABLE \
725 /* { name, min_len, max_len, decl_req, type_req, fn_type_req, handler } */ \
726 { "apple_kext_compatibility", 0, 0, false, true, false, \
727 darwin_handle_kext_attribute }, \
728 { "weak_import", 0, 0, true, false, false, \
729 darwin_handle_weak_import_attribute }
731 #undef ASM_GENERATE_INTERNAL_LABEL
732 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM) \
733 sprintf (LABEL, "*%s%ld", PREFIX, (long)(NUM))
735 #undef TARGET_ASM_MARK_DECL_PRESERVED
736 #define TARGET_ASM_MARK_DECL_PRESERVED darwin_mark_decl_preserved
738 /* Set on a symbol with SYMBOL_FLAG_FUNCTION or
739 MACHO_SYMBOL_FLAG_VARIABLE to indicate that the function or
740 variable has been defined in this translation unit.
741 When porting Mach-O to new architectures you need to make
742 sure these aren't clobbered by the backend. */
744 #define MACHO_SYMBOL_FLAG_VARIABLE (SYMBOL_FLAG_MACH_DEP)
745 #define MACHO_SYMBOL_FLAG_DEFINED ((SYMBOL_FLAG_MACH_DEP) << 1)
747 /* Set on a symbol to indicate when fix-and-continue style code
748 generation is being used and the symbol refers to a static symbol
749 that should be rebound from new instances of a translation unit to
750 the original instance of the data. */
752 #define MACHO_SYMBOL_STATIC ((SYMBOL_FLAG_MACH_DEP) << 2)
754 /* Symbolic names for various things we might know about a symbol. */
756 enum machopic_addr_class {
758 MACHOPIC_DEFINED_DATA,
759 MACHOPIC_UNDEFINED_DATA,
760 MACHOPIC_DEFINED_FUNCTION,
761 MACHOPIC_UNDEFINED_FUNCTION
764 /* Macros defining the various PIC cases. */
766 #define MACHO_DYNAMIC_NO_PIC_P (TARGET_DYNAMIC_NO_PIC)
767 #define MACHOPIC_INDIRECT (flag_pic || MACHO_DYNAMIC_NO_PIC_P)
768 #define MACHOPIC_JUST_INDIRECT (MACHO_DYNAMIC_NO_PIC_P)
769 #define MACHOPIC_PURE (flag_pic && ! MACHO_DYNAMIC_NO_PIC_P)
771 #undef TARGET_ENCODE_SECTION_INFO
772 #define TARGET_ENCODE_SECTION_INFO darwin_encode_section_info
773 #undef TARGET_STRIP_NAME_ENCODING
774 #define TARGET_STRIP_NAME_ENCODING default_strip_name_encoding
776 #define GEN_BINDER_NAME_FOR_STUB(BUF,STUB,STUB_LENGTH) \
778 const char *const stub_ = (STUB); \
779 char *buffer_ = (BUF); \
780 strcpy (buffer_, stub_); \
781 if (stub_[0] == '"') \
783 strcpy (buffer_ + (STUB_LENGTH) - 1, "_binder\""); \
787 strcpy (buffer_ + (STUB_LENGTH), "_binder"); \
791 #define GEN_SYMBOL_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH) \
793 const char *const symbol_ = (SYMBOL); \
794 char *buffer_ = (BUF); \
795 if (name_needs_quotes (symbol_) && symbol_[0] != '"') \
797 sprintf (buffer_, "\"%s\"", symbol_); \
801 strcpy (buffer_, symbol_); \
805 /* Given a symbol name string, create the lazy pointer version
806 of the symbol name. */
808 #define GEN_LAZY_PTR_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH) \
810 const char *symbol_ = (SYMBOL); \
811 char *buffer_ = (BUF); \
812 if (symbol_[0] == '"') \
814 strcpy (buffer_, "\"L"); \
815 strcpy (buffer_ + 2, symbol_ + 1); \
816 strcpy (buffer_ + (SYMBOL_LENGTH), "$lazy_ptr\""); \
818 else if (name_needs_quotes (symbol_)) \
820 strcpy (buffer_, "\"L"); \
821 strcpy (buffer_ + 2, symbol_); \
822 strcpy (buffer_ + (SYMBOL_LENGTH) + 2, "$lazy_ptr\""); \
826 strcpy (buffer_, "L"); \
827 strcpy (buffer_ + 1, symbol_); \
828 strcpy (buffer_ + (SYMBOL_LENGTH) + 1, "$lazy_ptr"); \
832 #define EH_FRAME_SECTION_NAME "__TEXT"
833 #define EH_FRAME_SECTION_ATTR ",coalesced,no_toc+strip_static_syms+live_support"
835 /* Java runtime class list. */
836 #define JCR_SECTION_NAME "__DATA,jcr,regular,no_dead_strip"
838 #undef ASM_PREFERRED_EH_DATA_FORMAT
839 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL) \
840 (((CODE) == 2 && (GLOBAL) == 1) \
841 ? (DW_EH_PE_pcrel | DW_EH_PE_indirect | DW_EH_PE_sdata4) : \
842 ((CODE) == 1 || (GLOBAL) == 0) ? DW_EH_PE_pcrel : DW_EH_PE_absptr)
844 #define ASM_OUTPUT_DWARF_DELTA(FILE,SIZE,LABEL1,LABEL2) \
845 darwin_asm_output_dwarf_delta (FILE, SIZE, LABEL1, LABEL2)
847 #define ASM_OUTPUT_DWARF_OFFSET(FILE,SIZE,LABEL,BASE) \
848 darwin_asm_output_dwarf_offset (FILE, SIZE, LABEL, BASE)
850 #define ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX(ASM_OUT_FILE, ENCODING, SIZE, ADDR, DONE) \
851 if (ENCODING == ASM_PREFERRED_EH_DATA_FORMAT (2, 1)) { \
852 darwin_non_lazy_pcrel (ASM_OUT_FILE, ADDR); \
856 /* Experimentally, putting jump tables in text is faster on SPEC.
857 Also this is needed for correctness for coalesced functions. */
859 #ifndef JUMP_TABLES_IN_TEXT_SECTION
860 #define JUMP_TABLES_IN_TEXT_SECTION 1
863 #define TARGET_TERMINATE_DW2_EH_FRAME_INFO false
865 #define TARGET_ASM_INIT_SECTIONS darwin_init_sections
866 #undef TARGET_ASM_NAMED_SECTION
867 #define TARGET_ASM_NAMED_SECTION darwin_asm_named_section
869 /* Handle pragma weak and pragma pack. */
870 #define HANDLE_SYSV_PRAGMA 1
872 #define HANDLE_PRAGMA_PACK_PUSH_POP 1
874 #define DARWIN_REGISTER_TARGET_PRAGMAS() \
876 /* APPLE LOCAL begin pragma mark 5614511 */ \
877 /* Removed mark. */ \
878 /* APPLE LOCAL end pragma mark 5614511 */ \
879 c_register_pragma (0, "options", darwin_pragma_options); \
880 c_register_pragma (0, "segment", darwin_pragma_ignore); \
881 c_register_pragma (0, "unused", darwin_pragma_unused); \
882 c_register_pragma (0, "ms_struct", darwin_pragma_ms_struct); \
886 #define ASM_APP_ON ""
888 #define ASM_APP_OFF ""
890 void darwin_register_frameworks (const char *, const char *, int);
891 void darwin_register_objc_includes (const char *, const char *, int);
892 #define TARGET_EXTRA_PRE_INCLUDES darwin_register_objc_includes
893 #define TARGET_EXTRA_INCLUDES darwin_register_frameworks
895 void add_framework_path (char *);
896 #define TARGET_OPTF add_framework_path
898 #define TARGET_POSIX_IO
900 /* All new versions of Darwin have C99 functions. */
902 #define TARGET_C99_FUNCTIONS 1
904 #define WINT_TYPE "int"
906 /* Every program on darwin links against libSystem which contains the pthread
907 routines, so there's no need to explicitly call out when doing threaded
910 #undef GOMP_SELF_SPECS
911 #define GOMP_SELF_SPECS ""
913 /* Darwin can't support anchors until we can cope with the adjustments
914 to size that ASM_DECLARE_OBJECT_NAME and ASM_DECLARE_CONSTANT_NAME
915 when outputting members of an anchor block and the linker can be
916 taught to keep them together or we find some other suitable
917 code-gen technique. */
920 #define TARGET_ASM_OUTPUT_ANCHOR darwin_asm_output_anchor
922 #define TARGET_ASM_OUTPUT_ANCHOR NULL
925 /* Attempt to turn on execute permission for the stack. This may be
926 used by INITIALIZE_TRAMPOLINE of the target needs it (that is,
927 if the target machine can change execute permissions on a page).
929 There is no way to query the execute permission of the stack, so
930 we always issue the mprotect() call.
932 Unfortunately it is not possible to make this namespace-clean.
934 Also note that no errors should be emitted by this code; it is
935 considered dangerous for library calls to send messages to
938 #define ENABLE_EXECUTE_STACK \
939 extern void __enable_execute_stack (void *); \
941 __enable_execute_stack (void *addr) \
943 extern int mprotect (void *, size_t, int); \
944 extern int getpagesize (void); \
952 size = getpagesize(); \
953 mask = ~((long) size - 1); \
956 page = (char *) (((long) addr) & mask); \
957 end = (char *) ((((long) (addr + (TARGET_64BIT ? 48 : 40))) & mask) + size); \
959 /* 7 == PROT_READ | PROT_WRITE | PROT_EXEC */ \
960 (void) mprotect (page, end - page, 7); \
963 /* For Apple KEXTs, we make the constructors return this to match gcc
965 #define TARGET_CXX_CDTOR_RETURNS_THIS (darwin_kextabi_p)
966 extern int flag_mkernel;
967 extern int flag_apple_kext;
968 #define TARGET_KEXTABI flag_apple_kext
970 #endif /* CONFIG_DARWIN_H */