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 /* Don't assume anything about the header files. */
44 #define NO_IMPLICIT_EXTERN_C
46 /* Suppress g++ attempt to link in the math library automatically. */
47 #define MATH_LIBRARY ""
53 /* Define an empty body for the function do_global_dtors() in libgcc2.c. */
55 #define DO_GLOBAL_DTORS_BODY
57 /* The string value for __SIZE_TYPE__. */
60 #define SIZE_TYPE "long unsigned int"
63 /* Type used for ptrdiff_t, as a string used in a declaration. */
66 #define PTRDIFF_TYPE "int"
71 #define WCHAR_TYPE "int"
72 #undef WCHAR_TYPE_SIZE
73 #define WCHAR_TYPE_SIZE 32
75 /* Default to using the NeXT-style runtime, since that's what is
76 pre-installed on Darwin systems. */
78 #define NEXT_OBJC_RUNTIME
80 /* Don't default to pcc-struct-return, because gcc is the only compiler, and
81 we want to retain compatibility with older gcc versions. */
83 #undef DEFAULT_PCC_STRUCT_RETURN
84 #define DEFAULT_PCC_STRUCT_RETURN 0
86 /* True if pragma ms_struct is in effect. */
87 extern GTY(()) int darwin_ms_struct;
89 /* This table intercepts weirdo options whose names would interfere
90 with normal driver conventions, and either translates them into
91 standardly-named options, or adds a 'Z' so that they can get to
92 specs processing without interference.
94 Do not expand a linker option to "-Xlinker -<option>", since that
95 forfeits the ability to control via spec strings later. However,
96 as a special exception, do this translation with -filelist, because
97 otherwise the driver will think there are no input files and quit.
98 (The alternative would be to hack the driver to recognize -filelist
99 specially, but it's simpler to use the translation table.)
101 Note that an option name with a prefix that matches another option
102 name, that also takes an argument, needs to be modified so the
103 prefix is different, otherwise a '*' after the shorter option will
104 match with the longer one.
106 The SUBTARGET_OPTION_TRANSLATE_TABLE macro, which _must_ be defined
107 in gcc/config/{i386,rs6000}/darwin.h, should contain any additional
108 command-line option translations specific to the particular target
111 #define TARGET_OPTION_TRANSLATE_TABLE \
112 { "-all_load", "-Zall_load" }, \
113 { "-allowable_client", "-Zallowable_client" }, \
114 { "-arch_errors_fatal", "-Zarch_errors_fatal" }, \
115 { "-bind_at_load", "-Zbind_at_load" }, \
116 { "-bundle", "-Zbundle" }, \
117 { "-bundle_loader", "-Zbundle_loader" }, \
118 { "-weak_reference_mismatches", "-Zweak_reference_mismatches" }, \
119 { "-dead_strip", "-Zdead_strip" }, \
120 { "-no_dead_strip_inits_and_terms", "-Zno_dead_strip_inits_and_terms" }, \
121 { "-dependency-file", "-MF" }, \
122 { "-dylib_file", "-Zdylib_file" }, \
123 { "-dynamic", "-Zdynamic" }, \
124 { "-dynamiclib", "-Zdynamiclib" }, \
125 { "-exported_symbols_list", "-Zexported_symbols_list" }, \
126 { "-gfull", "-g -fno-eliminate-unused-debug-symbols" }, \
127 { "-gused", "-g -feliminate-unused-debug-symbols" }, \
128 { "-segaddr", "-Zsegaddr" }, \
129 { "-segs_read_only_addr", "-Zsegs_read_only_addr" }, \
130 { "-segs_read_write_addr", "-Zsegs_read_write_addr" }, \
131 { "-seg_addr_table", "-Zseg_addr_table" }, \
132 { "-seg_addr_table_filename", "-Zfn_seg_addr_table_filename" }, \
133 { "-fapple-kext", "-fapple-kext -static -Wa,-static" }, \
134 { "-filelist", "-Xlinker -filelist -Xlinker" }, \
135 { "-findirect-virtual-calls", "-fapple-kext" }, \
136 { "-flat_namespace", "-Zflat_namespace" }, \
137 { "-force_cpusubtype_ALL", "-Zforce_cpusubtype_ALL" }, \
138 { "-force_flat_namespace", "-Zforce_flat_namespace" }, \
139 { "-framework", "-Xlinker -framework -Xlinker" }, \
140 { "-fterminated-vtables", "-fapple-kext" }, \
141 { "-image_base", "-Zimage_base" }, \
142 { "-init", "-Zinit" }, \
143 { "-install_name", "-Zinstall_name" }, \
144 { "-mkernel", "-mkernel -static -Wa,-static" }, \
145 { "-multiply_defined_unused", "-Zmultiplydefinedunused" }, \
146 { "-multiply_defined", "-Zmultiply_defined" }, \
147 { "-multi_module", "-Zmulti_module" }, \
148 { "-static", "-static -Wa,-static" }, \
149 { "-single_module", "-Zsingle_module" }, \
150 { "-unexported_symbols_list", "-Zunexported_symbols_list" }, \
151 SUBTARGET_OPTION_TRANSLATE_TABLE
153 #define SUBSUBTARGET_OVERRIDE_OPTIONS \
155 darwin_override_options (); \
158 /* These compiler options take n arguments. */
160 #undef WORD_SWITCH_TAKES_ARG
161 #define WORD_SWITCH_TAKES_ARG(STR) \
162 (DEFAULT_WORD_SWITCH_TAKES_ARG (STR) ? 1 : \
163 !strcmp (STR, "Zallowable_client") ? 1 : \
164 !strcmp (STR, "arch") ? 1 : \
165 !strcmp (STR, "arch_only") ? 1 : \
166 !strcmp (STR, "Zbundle_loader") ? 1 : \
167 !strcmp (STR, "client_name") ? 1 : \
168 !strcmp (STR, "compatibility_version") ? 1 : \
169 !strcmp (STR, "current_version") ? 1 : \
170 !strcmp (STR, "Zdylib_file") ? 1 : \
171 !strcmp (STR, "Zexported_symbols_list") ? 1 : \
172 !strcmp (STR, "Zimage_base") ? 1 : \
173 !strcmp (STR, "Zinit") ? 1 : \
174 !strcmp (STR, "Zinstall_name") ? 1 : \
175 !strcmp (STR, "Zmultiplydefinedunused") ? 1 : \
176 !strcmp (STR, "Zmultiply_defined") ? 1 : \
177 !strcmp (STR, "precomp-trustfile") ? 1 : \
178 !strcmp (STR, "read_only_relocs") ? 1 : \
179 !strcmp (STR, "sectcreate") ? 3 : \
180 !strcmp (STR, "sectorder") ? 3 : \
181 !strcmp (STR, "Zsegaddr") ? 2 : \
182 !strcmp (STR, "Zsegs_read_only_addr") ? 1 : \
183 !strcmp (STR, "Zsegs_read_write_addr") ? 1 : \
184 !strcmp (STR, "Zseg_addr_table") ? 1 : \
185 !strcmp (STR, "Zfn_seg_addr_table_filename") ? 1 :\
186 !strcmp (STR, "seg1addr") ? 1 : \
187 !strcmp (STR, "segprot") ? 3 : \
188 !strcmp (STR, "sub_library") ? 1 : \
189 !strcmp (STR, "sub_umbrella") ? 1 : \
190 !strcmp (STR, "umbrella") ? 1 : \
191 !strcmp (STR, "undefined") ? 1 : \
192 !strcmp (STR, "Zunexported_symbols_list") ? 1 : \
193 !strcmp (STR, "Zweak_reference_mismatches") ? 1 : \
194 !strcmp (STR, "pagezero_size") ? 1 : \
195 !strcmp (STR, "segs_read_only_addr") ? 1 : \
196 !strcmp (STR, "segs_read_write_addr") ? 1 : \
197 !strcmp (STR, "sectalign") ? 3 : \
198 !strcmp (STR, "sectobjectsymbols") ? 2 : \
199 !strcmp (STR, "segcreate") ? 3 : \
200 !strcmp (STR, "dylinker_install_name") ? 1 : \
203 #define SUBTARGET_C_COMMON_OVERRIDE_OPTIONS do { \
204 if (flag_mkernel || flag_apple_kext) \
206 if (flag_use_cxa_atexit == 2) \
207 flag_use_cxa_atexit = 0; \
208 /* kexts should always be built without the coalesced sections \
209 because the kernel loader doesn't grok such sections. */ \
211 /* No RTTI in kexts. */ \
216 /* Machine dependent cpp options. Don't add more options here, add
217 them to darwin_cpp_builtins in darwin-c.c. */
220 #define CPP_SPEC "%{static:%{!dynamic:-D__STATIC__}}%{!static:-D__DYNAMIC__}" \
221 " %{pthread:-D_REENTRANT}"
223 /* This is mostly a clone of the standard LINK_COMMAND_SPEC, plus
224 precomp, libtool, and fat build additions. Also we
225 don't specify a second %G after %L because libSystem is
226 self-contained and doesn't need to link against libgcc.a. */
227 /* In general, random Darwin linker flags should go into LINK_SPEC
228 instead of LINK_COMMAND_SPEC. The command spec is better for
229 specifying the handling of options understood by generic Unix
230 linkers, and for positional arguments like libraries. */
231 #define LINK_COMMAND_SPEC "\
232 %{!fdump=*:%{!fsyntax-only:%{!c:%{!M:%{!MM:%{!E:%{!S:\
233 %(linker) %l %X %{d} %{s} %{t} %{Z} \
234 %{A} %{e*} %{m} %{r} %{x} \
235 %{o*}%{!o:-o a.out} \
236 %{!A:%{!nostdlib:%{!nostartfiles:%S}}} \
237 %{L*} %{fopenmp:%:include(libgomp.spec)%(link_gomp)} \
238 %(link_libgcc) %o %{fprofile-arcs|fprofile-generate|coverage:-lgcov} \
239 %{!nostdlib:%{!nodefaultlibs:%(link_ssp) %G %L}} \
240 %{!A:%{!nostdlib:%{!nostartfiles:%E}}} %{T*} %{F*} }}}}}}}\n\
241 %{!fdump=*:%{!fsyntax-only:%{!c:%{!M:%{!MM:%{!E:%{!S:\
242 %{.c|.cc|.C|.cpp|.c++|.CPP|.m|.mm: \
243 %{gdwarf-2:%{!gstabs*:%{!gnone: dsymutil %{o*:%*}%{!o:a.out}}}}}}}}}}}}"
245 #ifdef TARGET_SYSTEM_ROOT
246 #define LINK_SYSROOT_SPEC \
247 "%{isysroot*:-syslibroot %*;:-syslibroot " TARGET_SYSTEM_ROOT "}"
249 #define LINK_SYSROOT_SPEC "%{isysroot*:-syslibroot %*}"
252 /* Please keep the random linker options in alphabetical order (modulo
253 'Z' and 'no' prefixes). Note that options taking arguments may appear
254 multiple times on a command line with different arguments each time,
255 so put a * after their names so all of them get passed. */
257 "%{static}%{!static:-dynamic} \
258 %{fgnu-runtime:%:replace-outfile(-lobjc -lobjc-gnu)}\
260 %{Zforce_cpusubtype_ALL:-arch %(darwin_arch) -force_cpusubtype_ALL} \
261 %{!Zforce_cpusubtype_ALL:-arch %(darwin_subarch)} \
263 %{Zbundle_loader*:-bundle_loader %*} \
265 %{compatibility_version*:%e-compatibility_version only allowed with -dynamiclib\
267 %{current_version*:%e-current_version only allowed with -dynamiclib} \
268 %{Zforce_flat_namespace:-force_flat_namespace} \
269 %{Zinstall_name*:%e-install_name only allowed with -dynamiclib} \
270 %{keep_private_externs} \
273 %{Zdynamiclib: -dylib \
274 %{Zbundle:%e-bundle not allowed with -dynamiclib} \
275 %{Zbundle_loader*:%e-bundle_loader not allowed with -dynamiclib} \
276 %{client_name*:%e-client_name not allowed with -dynamiclib} \
277 %{compatibility_version*:-dylib_compatibility_version %*} \
278 %{current_version*:-dylib_current_version %*} \
279 %{Zforce_cpusubtype_ALL:-arch %(darwin_arch)} \
280 %{!Zforce_cpusubtype_ALL: -arch %(darwin_subarch)} \
281 %{Zforce_flat_namespace:%e-force_flat_namespace not allowed with -dynamiclib} \
282 %{Zinstall_name*:-dylib_install_name %*} \
283 %{keep_private_externs:%e-keep_private_externs not allowed with -dynamiclib} \
284 %{private_bundle:%e-private_bundle not allowed with -dynamiclib} \
286 %{Zall_load:-all_load} \
287 %{Zallowable_client*:-allowable_client %*} \
288 %{Zbind_at_load:-bind_at_load} \
289 %{Zarch_errors_fatal:-arch_errors_fatal} \
290 %{Zdead_strip:-dead_strip} \
291 %{Zno_dead_strip_inits_and_terms:-no_dead_strip_inits_and_terms} \
292 %{Zdylib_file*:-dylib_file %*} \
293 %{Zdynamic:-dynamic}\
294 %{Zexported_symbols_list*:-exported_symbols_list %*} \
295 %{Zflat_namespace:-flat_namespace} \
296 %{headerpad_max_install_names*} \
297 %{Zimage_base*:-image_base %*} \
299 %{mmacosx-version-min=*:-macosx_version_min %*} \
300 %{!mmacosx-version-min=*:%{shared-libgcc:-macosx_version_min 10.3}} \
302 %{Zmulti_module:-multi_module} %{Zsingle_module:-single_module} \
303 %{Zmultiply_defined*:-multiply_defined %*} \
304 %{!Zmultiply_defined*:%{shared-libgcc: \
305 %:version-compare(< 10.5 mmacosx-version-min= -multiply_defined) \
306 %:version-compare(< 10.5 mmacosx-version-min= suppress)}} \
307 %{Zmultiplydefinedunused*:-multiply_defined_unused %*} \
308 %{prebind} %{noprebind} %{nofixprebinding} %{prebind_all_twolevel_modules} \
309 %{read_only_relocs} \
310 %{sectcreate*} %{sectorder*} %{seg1addr*} %{segprot*} \
311 %{Zsegaddr*:-segaddr %*} \
312 %{Zsegs_read_only_addr*:-segs_read_only_addr %*} \
313 %{Zsegs_read_write_addr*:-segs_read_write_addr %*} \
314 %{Zseg_addr_table*: -seg_addr_table %*} \
315 %{Zfn_seg_addr_table_filename*:-seg_addr_table_filename %*} \
316 %{sub_library*} %{sub_umbrella*} \
317 " LINK_SYSROOT_SPEC " \
318 %{twolevel_namespace} %{twolevel_namespace_hints} \
321 %{Zunexported_symbols_list*:-unexported_symbols_list %*} \
322 %{Zweak_reference_mismatches*:-weak_reference_mismatches %*} \
323 %{!Zweak_reference_mismatches*:-weak_reference_mismatches non-weak} \
327 %{pagezero_size*} %{segs_read_*} %{seglinkedit} %{noseglinkedit} \
328 %{sectalign*} %{sectobjectsymbols*} %{segcreate*} %{whyload} \
329 %{whatsloaded} %{dylinker_install_name*} \
330 %{dylinker} %{Mach} "
333 /* Machine dependent libraries. */
335 #define LIB_SPEC "%{!static:-lSystem}"
337 /* Support -mmacosx-version-min by supplying different (stub) libgcc_s.dylib
338 libraries to link against, and by not linking against libgcc_s on
341 Note that by default, -lgcc_eh is not linked against! This is
342 because in a future version of Darwin the EH frame information may
343 be in a new format, or the fallback routine might be changed; if
344 you want to explicitly link against the static version of those
345 routines, because you know you don't need to unwind through system
346 libraries, you need to explicitly say -static-libgcc.
348 If it is linked against, it has to be before -lgcc, because it may
349 need symbols from -lgcc. */
350 #undef REAL_LIBGCC_SPEC
351 #define REAL_LIBGCC_SPEC \
352 "%{static-libgcc|static: -lgcc_eh -lgcc; \
353 shared-libgcc|fexceptions: \
354 %:version-compare(!> 10.5 mmacosx-version-min= -lgcc_s.10.4) \
355 %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_s.10.5) \
357 :%:version-compare(>< 10.3.9 10.5 mmacosx-version-min= -lgcc_s.10.4) \
358 %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_s.10.5) \
361 /* We specify crt0.o as -lcrt0.o so that ld will search the library path.
363 crt3.o provides __cxa_atexit on systems that don't have it. Since
364 it's only used with C++, which requires passing -shared-libgcc, key
365 off that to avoid unnecessarily adding a destructor to every
366 powerpc program built. */
368 #undef STARTFILE_SPEC
369 #define STARTFILE_SPEC \
370 "%{Zdynamiclib: -ldylib1.o} \
371 %{!Zdynamiclib:%{Zbundle:%{!static:-lbundle1.o}} \
372 %{!Zbundle:%{pg:%{static:-lgcrt0.o} \
373 %{!static:%{object:-lgcrt0.o} \
374 %{!object:%{preload:-lgcrt0.o} \
375 %{!preload:-lgcrt1.o %(darwin_crt2)}}}} \
376 %{!pg:%{static:-lcrt0.o} \
377 %{!static:%{object:-lcrt0.o} \
378 %{!object:%{preload:-lcrt0.o} \
379 %{!preload:-lcrt1.o %(darwin_crt2)}}}}}} \
380 %{shared-libgcc:%:version-compare(< 10.5 mmacosx-version-min= crt3.o%s)}"
382 /* The native Darwin linker doesn't necessarily place files in the order
383 that they're specified on the link line. Thus, it is pointless
384 to put anything in ENDFILE_SPEC. */
385 /* #define ENDFILE_SPEC "" */
387 /* Default Darwin ASM_SPEC, very simple. */
388 #define ASM_SPEC "-arch %(darwin_arch) \
389 %{Zforce_cpusubtype_ALL:-force_cpusubtype_ALL}"
391 /* We still allow output of STABS. */
393 #define DBX_DEBUGGING_INFO 1
395 #define DWARF2_DEBUGGING_INFO
396 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
398 #define DEBUG_FRAME_SECTION "__DWARF,__debug_frame,regular,debug"
399 #define DEBUG_INFO_SECTION "__DWARF,__debug_info,regular,debug"
400 #define DEBUG_ABBREV_SECTION "__DWARF,__debug_abbrev,regular,debug"
401 #define DEBUG_ARANGES_SECTION "__DWARF,__debug_aranges,regular,debug"
402 #define DEBUG_MACINFO_SECTION "__DWARF,__debug_macinfo,regular,debug"
403 #define DEBUG_LINE_SECTION "__DWARF,__debug_line,regular,debug"
404 #define DEBUG_LOC_SECTION "__DWARF,__debug_loc,regular,debug"
405 #define DEBUG_PUBNAMES_SECTION "__DWARF,__debug_pubnames,regular,debug"
406 #define DEBUG_PUBTYPES_SECTION "__DWARF,__debug_pubtypes,regular,debug"
407 #define DEBUG_STR_SECTION "__DWARF,__debug_str,regular,debug"
408 #define DEBUG_RANGES_SECTION "__DWARF,__debug_ranges,regular,debug"
410 /* When generating stabs debugging, use N_BINCL entries. */
412 #define DBX_USE_BINCL
414 /* There is no limit to the length of stabs strings. */
416 #define DBX_CONTIN_LENGTH 0
418 /* gdb needs a null N_SO at the end of each file for scattered loading. */
420 #define DBX_OUTPUT_NULL_N_SO_AT_MAIN_SOURCE_FILE_END
422 /* GCC's definition of 'one_only' is the same as its definition of 'weak'. */
423 #define MAKE_DECL_ONE_ONLY(DECL) (DECL_WEAK (DECL) = 1)
425 /* Mach-O supports 'weak imports', and 'weak definitions' in coalesced
426 sections. machopic_select_section ensures that weak variables go in
427 coalesced sections. Weak aliases (or any other kind of aliases) are
428 not supported. Weak symbols that aren't visible outside the .s file
429 are not supported. */
430 #define ASM_WEAKEN_DECL(FILE, DECL, NAME, ALIAS) \
434 warning (0, "alias definitions not supported in Mach-O; ignored"); \
438 if (! DECL_EXTERNAL (DECL) && TREE_PUBLIC (DECL)) \
439 targetm.asm_out.globalize_label (FILE, NAME); \
440 if (DECL_EXTERNAL (DECL)) \
441 fputs ("\t.weak_reference ", FILE); \
442 else if (! lookup_attribute ("weak", DECL_ATTRIBUTES (DECL)) \
443 && lookup_attribute ("weak_import", DECL_ATTRIBUTES (DECL))) \
445 else if (TREE_PUBLIC (DECL)) \
446 fputs ("\t.weak_definition ", FILE); \
449 assemble_name (FILE, NAME); \
450 fputc ('\n', FILE); \
453 /* Darwin has the pthread routines in libSystem, which every program
454 links to, so there's no need for weak-ness for that. */
455 #define GTHREAD_USE_WEAK 0
457 /* The Darwin linker imposes two limitations on common symbols: they
458 can't have hidden visibility, and they can't appear in dylibs. As
459 a consequence, we should never use common symbols to represent
461 #undef USE_COMMON_FOR_ONE_ONLY
462 #define USE_COMMON_FOR_ONE_ONLY 0
464 /* The Darwin linker doesn't want coalesced symbols to appear in
465 a static archive's table of contents. */
466 #undef TARGET_WEAK_NOT_IN_ARCHIVE_TOC
467 #define TARGET_WEAK_NOT_IN_ARCHIVE_TOC 1
469 /* On Darwin, we don't (at the time of writing) have linkonce sections
470 with names, so it's safe to make the class data not comdat. */
471 #define TARGET_CXX_CLASS_DATA_ALWAYS_COMDAT hook_bool_void_false
473 /* We make exception information linkonce. */
474 #undef TARGET_USES_WEAK_UNWIND_INFO
475 #define TARGET_USES_WEAK_UNWIND_INFO 1
477 /* We need to use a nonlocal label for the start of an EH frame: the
478 Darwin linker requires that a coalesced section start with a label.
479 Unfortunately, it also requires that 'debug' sections don't contain
481 #undef FRAME_BEGIN_LABEL
482 #define FRAME_BEGIN_LABEL (for_eh ? "EH_frame" : "Lframe")
484 /* Emit a label for the FDE corresponding to DECL. EMPTY means
485 emit a label for an empty FDE. */
486 #define TARGET_ASM_EMIT_UNWIND_LABEL darwin_emit_unwind_label
488 /* Emit a label to separate the exception table. */
489 #define TARGET_ASM_EMIT_EXCEPT_TABLE_LABEL darwin_emit_except_table_label
491 /* Our profiling scheme doesn't LP labels and counter words. */
493 #define NO_PROFILE_COUNTERS 1
495 #undef INIT_SECTION_ASM_OP
496 #define INIT_SECTION_ASM_OP
500 #define TARGET_ASM_CONSTRUCTOR machopic_asm_out_constructor
501 #define TARGET_ASM_DESTRUCTOR machopic_asm_out_destructor
503 /* Always prefix with an underscore. */
505 #define USER_LABEL_PREFIX "_"
507 /* Don't output a .file directive. That is only used by the assembler for
509 #undef TARGET_ASM_FILE_START_FILE_DIRECTIVE
510 #define TARGET_ASM_FILE_START_FILE_DIRECTIVE false
512 #undef TARGET_ASM_FILE_END
513 #define TARGET_ASM_FILE_END darwin_file_end
515 #define ASM_OUTPUT_SKIP(FILE,SIZE) \
516 fprintf (FILE, "\t.space "HOST_WIDE_INT_PRINT_UNSIGNED"\n", SIZE)
518 /* Give ObjC methods pretty symbol names. */
520 #undef OBJC_GEN_METHOD_LABEL
521 #define OBJC_GEN_METHOD_LABEL(BUF,IS_INST,CLASS_NAME,CAT_NAME,SEL_NAME,NUM) \
523 sprintf (BUF, "%c[%s(%s) %s]", (IS_INST) ? '-' : '+', \
524 (CLASS_NAME), (CAT_NAME), (SEL_NAME)); \
526 sprintf (BUF, "%c[%s %s]", (IS_INST) ? '-' : '+', \
527 (CLASS_NAME), (SEL_NAME)); \
530 /* The RTTI data (e.g., __ti4name) is common and public (and static),
531 but it does need to be referenced via indirect PIC data pointers.
532 The machopic_define_symbol calls are telling the machopic subsystem
533 that the name *is* defined in this module, so it doesn't need to
534 make them indirect. */
536 #undef ASM_DECLARE_OBJECT_NAME
537 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL) \
539 const char *xname = NAME; \
540 if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF) \
541 xname = IDENTIFIER_POINTER (DECL_NAME (DECL)); \
542 if (! DECL_WEAK (DECL) \
543 && ((TREE_STATIC (DECL) \
544 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
545 || DECL_INITIAL (DECL))) \
546 machopic_define_symbol (DECL_RTL (DECL)); \
547 if ((TREE_STATIC (DECL) \
548 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
549 || DECL_INITIAL (DECL)) \
550 (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false); \
551 ASM_OUTPUT_LABEL (FILE, xname); \
552 /* Darwin doesn't support zero-size objects, so give them a \
554 if (tree_low_cst (DECL_SIZE_UNIT (DECL), 1) == 0) \
555 assemble_zeros (1); \
558 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
560 const char *xname = NAME; \
561 if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF) \
562 xname = IDENTIFIER_POINTER (DECL_NAME (DECL)); \
563 if (! DECL_WEAK (DECL) \
564 && ((TREE_STATIC (DECL) \
565 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
566 || DECL_INITIAL (DECL))) \
567 machopic_define_symbol (DECL_RTL (DECL)); \
568 if ((TREE_STATIC (DECL) \
569 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
570 || DECL_INITIAL (DECL)) \
571 (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false); \
572 ASM_OUTPUT_LABEL (FILE, xname); \
575 #define ASM_DECLARE_CONSTANT_NAME(FILE, NAME, EXP, SIZE) \
577 ASM_OUTPUT_LABEL (FILE, NAME); \
578 /* Darwin doesn't support zero-size objects, so give them a \
581 assemble_zeros (1); \
584 /* Wrap new method names in quotes so the assembler doesn't gag.
585 Make Objective-C internal symbols local. */
587 #undef ASM_OUTPUT_LABELREF
588 #define ASM_OUTPUT_LABELREF(FILE,NAME) \
590 const char *xname = (NAME); \
591 if (! strcmp (xname, "<pic base>")) \
592 machopic_output_function_base_name(FILE); \
593 else if (xname[0] == '&' || xname[0] == '*') \
595 int len = strlen (xname); \
596 if (len > 6 && !strcmp ("$stub", xname + len - 5)) \
597 machopic_validate_stub_or_non_lazy_ptr (xname); \
598 else if (len > 7 && !strcmp ("$stub\"", xname + len - 6)) \
599 machopic_validate_stub_or_non_lazy_ptr (xname); \
600 else if (len > 14 && !strcmp ("$non_lazy_ptr", xname + len - 13)) \
601 machopic_validate_stub_or_non_lazy_ptr (xname); \
602 else if (len > 15 && !strcmp ("$non_lazy_ptr\"", xname + len - 14)) \
603 machopic_validate_stub_or_non_lazy_ptr (xname); \
604 if (xname[1] != '"' && name_needs_quotes (&xname[1])) \
605 fprintf (FILE, "\"%s\"", &xname[1]); \
607 fputs (&xname[1], FILE); \
609 else if (xname[0] == '+' || xname[0] == '-') \
610 fprintf (FILE, "\"%s\"", xname); \
611 else if (!strncmp (xname, "_OBJC_", 6)) \
612 fprintf (FILE, "L%s", xname); \
613 else if (!strncmp (xname, ".objc_class_name_", 17)) \
614 fprintf (FILE, "%s", xname); \
615 else if (xname[0] != '"' && name_needs_quotes (xname)) \
616 fprintf (FILE, "\"%s\"", xname); \
618 asm_fprintf (FILE, "%U%s", xname); \
621 /* Output before executable code. */
622 #undef TEXT_SECTION_ASM_OP
623 #define TEXT_SECTION_ASM_OP "\t.text"
625 /* Output before writable data. */
627 #undef DATA_SECTION_ASM_OP
628 #define DATA_SECTION_ASM_OP "\t.data"
631 #define ALIGN_ASM_OP ".align"
633 #undef ASM_OUTPUT_ALIGN
634 #define ASM_OUTPUT_ALIGN(FILE,LOG) \
636 fprintf (FILE, "\t%s %d\n", ALIGN_ASM_OP, (LOG))
638 /* Ensure correct alignment of bss data. */
640 #undef ASM_OUTPUT_ALIGNED_DECL_LOCAL
641 #define ASM_OUTPUT_ALIGNED_DECL_LOCAL(FILE, DECL, NAME, SIZE, ALIGN) \
643 unsigned HOST_WIDE_INT _new_size = SIZE; \
644 fputs (".lcomm ", (FILE)); \
645 assemble_name ((FILE), (NAME)); \
646 if (_new_size == 0) _new_size = 1; \
647 fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED",%u\n", _new_size, \
648 floor_log2 ((ALIGN) / BITS_PER_UNIT)); \
649 if ((DECL) && ((TREE_STATIC (DECL) \
650 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
651 || DECL_INITIAL (DECL))) \
653 (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false); \
654 machopic_define_symbol (DECL_RTL (DECL)); \
658 /* The maximum alignment which the object file format can support.
659 For Mach-O, this is 2^15. */
661 #undef MAX_OFILE_ALIGNMENT
662 #define MAX_OFILE_ALIGNMENT 0x8000
664 /* Declare the section variables. */
665 #ifndef USED_FOR_TARGET
666 enum darwin_section_enum {
667 #define DEF_SECTION(NAME, FLAGS, DIRECTIVE, OBJC) NAME,
668 #include "darwin-sections.def"
672 extern GTY(()) section * darwin_sections[NUM_DARWIN_SECTIONS];
675 #undef TARGET_ASM_SELECT_SECTION
676 #define TARGET_ASM_SELECT_SECTION machopic_select_section
677 #define USE_SELECT_SECTION_FOR_FUNCTIONS
679 #undef TARGET_ASM_SELECT_RTX_SECTION
680 #define TARGET_ASM_SELECT_RTX_SECTION machopic_select_rtx_section
681 #undef TARGET_ASM_UNIQUE_SECTION
682 #define TARGET_ASM_UNIQUE_SECTION darwin_unique_section
683 #undef TARGET_ASM_FUNCTION_RODATA_SECTION
684 #define TARGET_ASM_FUNCTION_RODATA_SECTION default_no_function_rodata_section
687 #define ASM_DECLARE_UNRESOLVED_REFERENCE(FILE,NAME) \
690 if (MACHOPIC_INDIRECT) \
691 fprintf (FILE, "\t.lazy_reference "); \
693 fprintf (FILE, "\t.reference "); \
694 assemble_name (FILE, NAME); \
695 fprintf (FILE, "\n"); \
699 #define ASM_DECLARE_CLASS_REFERENCE(FILE,NAME) \
702 fprintf (FILE, "\t"); \
703 assemble_name (FILE, NAME); \
704 fprintf (FILE, "=0\n"); \
705 (*targetm.asm_out.globalize_label) (FILE, NAME); \
709 /* Globalizing directive for a label. */
710 #define GLOBAL_ASM_OP ".globl "
711 #define TARGET_ASM_GLOBALIZE_LABEL darwin_globalize_label
713 /* Emit an assembler directive to set visibility for a symbol. Used
714 to support visibility attribute and Darwin's private extern
716 #undef TARGET_ASM_ASSEMBLE_VISIBILITY
717 #define TARGET_ASM_ASSEMBLE_VISIBILITY darwin_assemble_visibility
719 /* Extra attributes for Darwin. */
720 #define SUBTARGET_ATTRIBUTE_TABLE \
721 /* { name, min_len, max_len, decl_req, type_req, fn_type_req, handler } */ \
722 { "apple_kext_compatibility", 0, 0, false, true, false, \
723 darwin_handle_kext_attribute }, \
724 { "weak_import", 0, 0, true, false, false, \
725 darwin_handle_weak_import_attribute }
727 #undef ASM_GENERATE_INTERNAL_LABEL
728 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM) \
729 sprintf (LABEL, "*%s%ld", PREFIX, (long)(NUM))
731 #undef TARGET_ASM_MARK_DECL_PRESERVED
732 #define TARGET_ASM_MARK_DECL_PRESERVED darwin_mark_decl_preserved
734 /* Set on a symbol with SYMBOL_FLAG_FUNCTION or
735 MACHO_SYMBOL_FLAG_VARIABLE to indicate that the function or
736 variable has been defined in this translation unit.
737 When porting Mach-O to new architectures you need to make
738 sure these aren't clobbered by the backend. */
740 #define MACHO_SYMBOL_FLAG_VARIABLE (SYMBOL_FLAG_MACH_DEP)
741 #define MACHO_SYMBOL_FLAG_DEFINED ((SYMBOL_FLAG_MACH_DEP) << 1)
743 /* Set on a symbol to indicate when fix-and-continue style code
744 generation is being used and the symbol refers to a static symbol
745 that should be rebound from new instances of a translation unit to
746 the original instance of the data. */
748 #define MACHO_SYMBOL_STATIC ((SYMBOL_FLAG_MACH_DEP) << 2)
750 /* Symbolic names for various things we might know about a symbol. */
752 enum machopic_addr_class {
754 MACHOPIC_DEFINED_DATA,
755 MACHOPIC_UNDEFINED_DATA,
756 MACHOPIC_DEFINED_FUNCTION,
757 MACHOPIC_UNDEFINED_FUNCTION
760 /* Macros defining the various PIC cases. */
762 #define MACHO_DYNAMIC_NO_PIC_P (TARGET_DYNAMIC_NO_PIC)
763 #define MACHOPIC_INDIRECT (flag_pic || MACHO_DYNAMIC_NO_PIC_P)
764 #define MACHOPIC_JUST_INDIRECT (MACHO_DYNAMIC_NO_PIC_P)
765 #define MACHOPIC_PURE (flag_pic && ! MACHO_DYNAMIC_NO_PIC_P)
767 #undef TARGET_ENCODE_SECTION_INFO
768 #define TARGET_ENCODE_SECTION_INFO darwin_encode_section_info
769 #undef TARGET_STRIP_NAME_ENCODING
770 #define TARGET_STRIP_NAME_ENCODING default_strip_name_encoding
772 #define GEN_BINDER_NAME_FOR_STUB(BUF,STUB,STUB_LENGTH) \
774 const char *const stub_ = (STUB); \
775 char *buffer_ = (BUF); \
776 strcpy (buffer_, stub_); \
777 if (stub_[0] == '"') \
779 strcpy (buffer_ + (STUB_LENGTH) - 1, "_binder\""); \
783 strcpy (buffer_ + (STUB_LENGTH), "_binder"); \
787 #define GEN_SYMBOL_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH) \
789 const char *const symbol_ = (SYMBOL); \
790 char *buffer_ = (BUF); \
791 if (name_needs_quotes (symbol_) && symbol_[0] != '"') \
793 sprintf (buffer_, "\"%s\"", symbol_); \
797 strcpy (buffer_, symbol_); \
801 /* Given a symbol name string, create the lazy pointer version
802 of the symbol name. */
804 #define GEN_LAZY_PTR_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH) \
806 const char *symbol_ = (SYMBOL); \
807 char *buffer_ = (BUF); \
808 if (symbol_[0] == '"') \
810 strcpy (buffer_, "\"L"); \
811 strcpy (buffer_ + 2, symbol_ + 1); \
812 strcpy (buffer_ + (SYMBOL_LENGTH), "$lazy_ptr\""); \
814 else if (name_needs_quotes (symbol_)) \
816 strcpy (buffer_, "\"L"); \
817 strcpy (buffer_ + 2, symbol_); \
818 strcpy (buffer_ + (SYMBOL_LENGTH) + 2, "$lazy_ptr\""); \
822 strcpy (buffer_, "L"); \
823 strcpy (buffer_ + 1, symbol_); \
824 strcpy (buffer_ + (SYMBOL_LENGTH) + 1, "$lazy_ptr"); \
828 #define EH_FRAME_SECTION_NAME "__TEXT"
829 #define EH_FRAME_SECTION_ATTR ",coalesced,no_toc+strip_static_syms+live_support"
831 /* Java runtime class list. */
832 #define JCR_SECTION_NAME "__DATA,jcr,regular,no_dead_strip"
834 #undef ASM_PREFERRED_EH_DATA_FORMAT
835 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL) \
836 (((CODE) == 2 && (GLOBAL) == 1) \
837 ? (DW_EH_PE_pcrel | DW_EH_PE_indirect | DW_EH_PE_sdata4) : \
838 ((CODE) == 1 || (GLOBAL) == 0) ? DW_EH_PE_pcrel : DW_EH_PE_absptr)
840 #define ASM_OUTPUT_DWARF_DELTA(FILE,SIZE,LABEL1,LABEL2) \
841 darwin_asm_output_dwarf_delta (FILE, SIZE, LABEL1, LABEL2)
843 #define ASM_OUTPUT_DWARF_OFFSET(FILE,SIZE,LABEL,BASE) \
844 darwin_asm_output_dwarf_offset (FILE, SIZE, LABEL, BASE)
846 #define ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX(ASM_OUT_FILE, ENCODING, SIZE, ADDR, DONE) \
847 if (ENCODING == ASM_PREFERRED_EH_DATA_FORMAT (2, 1)) { \
848 darwin_non_lazy_pcrel (ASM_OUT_FILE, ADDR); \
852 /* Experimentally, putting jump tables in text is faster on SPEC.
853 Also this is needed for correctness for coalesced functions. */
855 #ifndef JUMP_TABLES_IN_TEXT_SECTION
856 #define JUMP_TABLES_IN_TEXT_SECTION 1
859 #define TARGET_TERMINATE_DW2_EH_FRAME_INFO false
861 #define TARGET_ASM_INIT_SECTIONS darwin_init_sections
862 #undef TARGET_ASM_NAMED_SECTION
863 #define TARGET_ASM_NAMED_SECTION darwin_asm_named_section
865 /* Handle pragma weak and pragma pack. */
866 #define HANDLE_SYSV_PRAGMA 1
868 #define HANDLE_PRAGMA_PACK_PUSH_POP 1
870 #define DARWIN_REGISTER_TARGET_PRAGMAS() \
872 c_register_pragma (0, "mark", darwin_pragma_ignore); \
873 c_register_pragma (0, "options", darwin_pragma_options); \
874 c_register_pragma (0, "segment", darwin_pragma_ignore); \
875 c_register_pragma (0, "unused", darwin_pragma_unused); \
876 c_register_pragma (0, "ms_struct", darwin_pragma_ms_struct); \
880 #define ASM_APP_ON ""
882 #define ASM_APP_OFF ""
884 void darwin_register_frameworks (const char *, const char *, int);
885 void darwin_register_objc_includes (const char *, const char *, int);
886 #define TARGET_EXTRA_PRE_INCLUDES darwin_register_objc_includes
887 #define TARGET_EXTRA_INCLUDES darwin_register_frameworks
889 void add_framework_path (char *);
890 #define TARGET_OPTF add_framework_path
892 #define TARGET_POSIX_IO
894 /* All new versions of Darwin have C99 functions. */
896 #define TARGET_C99_FUNCTIONS 1
898 #define WINT_TYPE "int"
900 /* Every program on darwin links against libSystem which contains the pthread
901 routines, so there's no need to explicitly call out when doing threaded
904 #undef GOMP_SELF_SPECS
905 #define GOMP_SELF_SPECS ""
907 /* Darwin can't support anchors until we can cope with the adjustments
908 to size that ASM_DECLARE_OBJECT_NAME and ASM_DECLARE_CONSTANT_NAME
909 when outputting members of an anchor block and the linker can be
910 taught to keep them together or we find some other suitable
911 code-gen technique. */
914 #define TARGET_ASM_OUTPUT_ANCHOR darwin_asm_output_anchor
916 #define TARGET_ASM_OUTPUT_ANCHOR NULL
919 /* Attempt to turn on execute permission for the stack. This may be
920 used by INITIALIZE_TRAMPOLINE of the target needs it (that is,
921 if the target machine can change execute permissions on a page).
923 There is no way to query the execute permission of the stack, so
924 we always issue the mprotect() call.
926 Unfortunately it is not possible to make this namespace-clean.
928 Also note that no errors should be emitted by this code; it is
929 considered dangerous for library calls to send messages to
932 #define ENABLE_EXECUTE_STACK \
933 extern void __enable_execute_stack (void *); \
935 __enable_execute_stack (void *addr) \
937 extern int mprotect (void *, size_t, int); \
938 extern int getpagesize (void); \
946 size = getpagesize(); \
947 mask = ~((long) size - 1); \
950 page = (char *) (((long) addr) & mask); \
951 end = (char *) ((((long) (addr + (TARGET_64BIT ? 48 : 40))) & mask) + size); \
953 /* 7 == PROT_READ | PROT_WRITE | PROT_EXEC */ \
954 (void) mprotect (page, end - page, 7); \
957 /* For Apple KEXTs, we make the constructors return this to match gcc
959 #define TARGET_CXX_CDTOR_RETURNS_THIS (darwin_kextabi_p)
960 extern int flag_mkernel;
961 extern int flag_apple_kext;
962 #define TARGET_KEXTABI flag_apple_kext
964 #endif /* CONFIG_DARWIN_H */