1 /* Target definitions for Darwin (Mac OS X) systems.
2 Copyright (C) 1989, 1990, 1991, 1992, 1993, 2000, 2001, 2002, 2003, 2004,
4 Free Software Foundation, Inc.
5 Contributed by Apple Computer Inc.
7 This file is part of GCC.
9 GCC is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2, or (at your option)
14 GCC is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with GCC; see the file COPYING. If not, write to
21 the Free Software Foundation, 51 Franklin Street, Fifth Floor,
22 Boston, MA 02110-1301, USA. */
24 #ifndef CONFIG_DARWIN_H
25 #define CONFIG_DARWIN_H
27 /* The definitions in this file are common to all processor types
28 running Darwin, which is the kernel for Mac OS X. Darwin is
29 basically a BSD user layer laid over a Mach kernel, then evolved
30 for many years (at NeXT) in parallel with other Unix systems. So
31 while the runtime is a somewhat idiosyncratic Mach-based thing,
32 other definitions look like they would for a BSD variant. */
34 /* Although NeXT ran on many different architectures, as of Jan 2001
35 the only supported Darwin targets are PowerPC and x86. */
37 /* One of Darwin's NeXT legacies is the Mach-O format, which is partly
38 like a.out and partly like COFF, with additional features like
39 multi-architecture binary support. */
41 #define OBJECT_FORMAT_MACHO
43 /* Suppress g++ attempt to link in the math library automatically. */
44 #define MATH_LIBRARY ""
50 /* Define an empty body for the function do_global_dtors() in libgcc2.c. */
52 #define DO_GLOBAL_DTORS_BODY
54 /* The string value for __SIZE_TYPE__. */
57 #define SIZE_TYPE "long unsigned int"
60 /* Type used for ptrdiff_t, as a string used in a declaration. */
63 #define PTRDIFF_TYPE "int"
68 #define WCHAR_TYPE "int"
69 #undef WCHAR_TYPE_SIZE
70 #define WCHAR_TYPE_SIZE 32
72 /* Default to using the NeXT-style runtime, since that's what is
73 pre-installed on Darwin systems. */
75 #define NEXT_OBJC_RUNTIME
77 /* Don't default to pcc-struct-return, because gcc is the only compiler, and
78 we want to retain compatibility with older gcc versions. */
80 #undef DEFAULT_PCC_STRUCT_RETURN
81 #define DEFAULT_PCC_STRUCT_RETURN 0
83 /* This table intercepts weirdo options whose names would interfere
84 with normal driver conventions, and either translates them into
85 standardly-named options, or adds a 'Z' so that they can get to
86 specs processing without interference.
88 Do not expand a linker option to "-Xlinker -<option>", since that
89 forfeits the ability to control via spec strings later. However,
90 as a special exception, do this translation with -filelist, because
91 otherwise the driver will think there are no input files and quit.
92 (The alternative would be to hack the driver to recognize -filelist
93 specially, but it's simpler to use the translation table.)
95 Note that an option name with a prefix that matches another option
96 name, that also takes an argument, needs to be modified so the
97 prefix is different, otherwise a '*' after the shorter option will
98 match with the longer one.
100 The SUBTARGET_OPTION_TRANSLATE_TABLE macro, which _must_ be defined
101 in gcc/config/{i386,rs6000}/darwin.h, should contain any additional
102 command-line option translations specific to the particular target
105 #define TARGET_OPTION_TRANSLATE_TABLE \
106 { "-all_load", "-Zall_load" }, \
107 { "-allowable_client", "-Zallowable_client" }, \
108 { "-arch_errors_fatal", "-Zarch_errors_fatal" }, \
109 { "-bind_at_load", "-Zbind_at_load" }, \
110 { "-bundle", "-Zbundle" }, \
111 { "-bundle_loader", "-Zbundle_loader" }, \
112 { "-weak_reference_mismatches", "-Zweak_reference_mismatches" }, \
113 { "-dead_strip", "-Zdead_strip" }, \
114 { "-no_dead_strip_inits_and_terms", "-Zno_dead_strip_inits_and_terms" }, \
115 { "-dependency-file", "-MF" }, \
116 { "-dylib_file", "-Zdylib_file" }, \
117 { "-dynamic", "-Zdynamic" }, \
118 { "-dynamiclib", "-Zdynamiclib" }, \
119 { "-exported_symbols_list", "-Zexported_symbols_list" }, \
120 { "-gfull", "-g -fno-eliminate-unused-debug-symbols" }, \
121 { "-gused", "-g -feliminate-unused-debug-symbols" }, \
122 { "-segaddr", "-Zsegaddr" }, \
123 { "-segs_read_only_addr", "-Zsegs_read_only_addr" }, \
124 { "-segs_read_write_addr", "-Zsegs_read_write_addr" }, \
125 { "-seg_addr_table", "-Zseg_addr_table" }, \
126 { "-seg_addr_table_filename", "-Zseg_addr_table_filename" }, \
127 { "-filelist", "-Xlinker -filelist -Xlinker" }, \
128 { "-framework", "-Xlinker -framework -Xlinker" }, \
129 { "-flat_namespace", "-Zflat_namespace" }, \
130 { "-force_cpusubtype_ALL", "-Zforce_cpusubtype_ALL" }, \
131 { "-force_flat_namespace", "-Zforce_flat_namespace" }, \
132 { "-image_base", "-Zimage_base" }, \
133 { "-init", "-Zinit" }, \
134 { "-install_name", "-Zinstall_name" }, \
135 { "-multiply_defined_unused", "-Zmultiplydefinedunused" }, \
136 { "-multiply_defined", "-Zmultiply_defined" }, \
137 { "-multi_module", "-Zmulti_module" }, \
138 { "-static", "-static -Wa,-static" }, \
139 { "-single_module", "-Zsingle_module" }, \
140 { "-unexported_symbols_list", "-Zunexported_symbols_list" }, \
141 SUBTARGET_OPTION_TRANSLATE_TABLE
143 /* These compiler options take n arguments. */
145 #undef WORD_SWITCH_TAKES_ARG
146 #define WORD_SWITCH_TAKES_ARG(STR) \
147 (DEFAULT_WORD_SWITCH_TAKES_ARG (STR) ? 1 : \
148 !strcmp (STR, "Zallowable_client") ? 1 : \
149 !strcmp (STR, "arch") ? 1 : \
150 !strcmp (STR, "arch_only") ? 1 : \
151 !strcmp (STR, "Zbundle_loader") ? 1 : \
152 !strcmp (STR, "client_name") ? 1 : \
153 !strcmp (STR, "compatibility_version") ? 1 : \
154 !strcmp (STR, "current_version") ? 1 : \
155 !strcmp (STR, "Zdylib_file") ? 1 : \
156 !strcmp (STR, "Zexported_symbols_list") ? 1 : \
157 !strcmp (STR, "Zimage_base") ? 1 : \
158 !strcmp (STR, "Zinit") ? 1 : \
159 !strcmp (STR, "Zinstall_name") ? 1 : \
160 !strcmp (STR, "Zmultiplydefinedunused") ? 1 : \
161 !strcmp (STR, "Zmultiply_defined") ? 1 : \
162 !strcmp (STR, "precomp-trustfile") ? 1 : \
163 !strcmp (STR, "read_only_relocs") ? 1 : \
164 !strcmp (STR, "sectcreate") ? 3 : \
165 !strcmp (STR, "sectorder") ? 3 : \
166 !strcmp (STR, "Zsegaddr") ? 2 : \
167 !strcmp (STR, "Zsegs_read_only_addr") ? 1 : \
168 !strcmp (STR, "Zsegs_read_write_addr") ? 1 : \
169 !strcmp (STR, "Zseg_addr_table") ? 1 : \
170 !strcmp (STR, "Zseg_addr_table_filename") ?1 :\
171 !strcmp (STR, "seg1addr") ? 1 : \
172 !strcmp (STR, "segprot") ? 3 : \
173 !strcmp (STR, "sub_library") ? 1 : \
174 !strcmp (STR, "sub_umbrella") ? 1 : \
175 !strcmp (STR, "umbrella") ? 1 : \
176 !strcmp (STR, "undefined") ? 1 : \
177 !strcmp (STR, "Zunexported_symbols_list") ? 1 : \
178 !strcmp (STR, "Zweak_reference_mismatches") ? 1 : \
179 !strcmp (STR, "pagezero_size") ? 1 : \
180 !strcmp (STR, "segs_read_only_addr") ? 1 : \
181 !strcmp (STR, "segs_read_write_addr") ? 1 : \
182 !strcmp (STR, "sectalign") ? 3 : \
183 !strcmp (STR, "sectobjectsymbols") ? 2 : \
184 !strcmp (STR, "segcreate") ? 3 : \
185 !strcmp (STR, "dylinker_install_name") ? 1 : \
188 /* Machine dependent cpp options. Don't add more options here, add
189 them to darwin_cpp_builtins in darwin-c.c. */
192 #define CPP_SPEC "%{static:%{!dynamic:-D__STATIC__}}%{!static:-D__DYNAMIC__}"
194 /* This is mostly a clone of the standard LINK_COMMAND_SPEC, plus
195 precomp, libtool, and fat build additions. Also we
196 don't specify a second %G after %L because libSystem is
197 self-contained and doesn't need to link against libgcc.a. */
198 /* In general, random Darwin linker flags should go into LINK_SPEC
199 instead of LINK_COMMAND_SPEC. The command spec is better for
200 specifying the handling of options understood by generic Unix
201 linkers, and for positional arguments like libraries. */
202 #define LINK_COMMAND_SPEC "\
203 %{!fdump=*:%{!fsyntax-only:%{!precomp:%{!c:%{!M:%{!MM:%{!E:%{!S:\
204 %{!Zdynamiclib:%(linker)}%{Zdynamiclib:/usr/bin/libtool} \
205 %l %X %{d} %{s} %{t} %{Z} \
206 %{!Zdynamiclib:%{A} %{e*} %{m} %{N} %{n} %{r} %{u*} %{x} %{z}} \
207 %{@:-o %f%u.out}%{!@:%{o*}%{!o:-o a.out}} \
208 %{!Zdynamiclib:%{!A:%{!nostdlib:%{!nostartfiles:%S}}}} \
209 %{L*} %(link_libgcc) %o %{fprofile-arcs|fprofile-generate|coverage:-lgcov} \
210 %{!nostdlib:%{!nodefaultlibs:%(link_ssp) %G %L}} \
211 %{!A:%{!nostdlib:%{!nostartfiles:%E}}} %{T*} %{F*} }}}}}}}}"
213 /* Please keep the random linker options in alphabetical order (modulo
214 'Z' and 'no' prefixes). Options that can only go to one of libtool
215 or ld must be listed twice, under both !Zdynamiclib and
216 Zdynamiclib, with one of the cases reporting an error. */
217 /* Note that options taking arguments may appear multiple times on a
218 command line with different arguments each time, so put a * after
219 their names so all of them get passed. */
221 "%{static}%{!static:-dynamic} \
222 %{fgnu-runtime:%:replace-outfile(-lobjc -lobjc-gnu)}\
224 %{Zforce_cpusubtype_ALL:-arch %(darwin_arch) -force_cpusubtype_ALL} \
225 %{!Zforce_cpusubtype_ALL:-arch %(darwin_subarch)} \
227 %{Zbundle_loader*:-bundle_loader %*} \
229 %{compatibility_version*:%e-compatibility_version only allowed with -dynamiclib\
231 %{current_version*:%e-current_version only allowed with -dynamiclib} \
232 %{Zforce_flat_namespace:-force_flat_namespace} \
233 %{Zinstall_name*:%e-install_name only allowed with -dynamiclib} \
234 %{keep_private_externs} \
238 %{Zbundle:%e-bundle not allowed with -dynamiclib} \
239 %{Zbundle_loader*:%e-bundle_loader not allowed with -dynamiclib} \
240 %{client_name*:%e-client_name not allowed with -dynamiclib} \
241 %{compatibility_version*} \
242 %{current_version*} \
243 %{Zforce_cpusubtype_ALL:-arch_only %(darwin_arch)} \
244 %{!Zforce_cpusubtype_ALL: -arch_only %(darwin_subarch)} \
245 %{Zforce_flat_namespace:%e-force_flat_namespace not allowed with -dynamiclib} \
246 %{Zinstall_name*:-install_name %*} \
247 %{keep_private_externs:%e-keep_private_externs not allowed with -dynamiclib} \
248 %{private_bundle:%e-private_bundle not allowed with -dynamiclib} \
250 %{Zall_load:-all_load}%{Zdynamiclib:%{!Zall_load:-noall_load}} \
251 %{Zallowable_client*:-allowable_client %*} \
252 %{Zbind_at_load:-bind_at_load} \
253 %{Zarch_errors_fatal:-arch_errors_fatal} \
254 %{Zdead_strip:-dead_strip} \
255 %{Zno_dead_strip_inits_and_terms:-no_dead_strip_inits_and_terms} \
256 %{Zdylib_file*:-dylib_file %*} \
257 %{Zdynamic:-dynamic}\
258 %{Zexported_symbols_list*:-exported_symbols_list %*} \
259 %{Zflat_namespace:-flat_namespace} \
260 %{headerpad_max_install_names*} \
261 %{Zimage_base*:-image_base %*} \
264 %{Zmulti_module:-multi_module} %{Zsingle_module:-single_module} \
265 %{Zmultiply_defined*:-multiply_defined %*} \
266 %{Zmultiplydefinedunused*:-multiply_defined_unused %*} \
267 %{prebind} %{noprebind} %{nofixprebinding} %{prebind_all_twolevel_modules} \
268 %{read_only_relocs} \
269 %{sectcreate*} %{sectorder*} %{seg1addr*} %{segprot*} \
270 %{Zsegaddr*:-segaddr %*} \
271 %{Zsegs_read_only_addr*:-segs_read_only_addr %*} \
272 %{Zsegs_read_write_addr*:-segs_read_write_addr %*} \
273 %{Zseg_addr_table*: -seg_addr_table %*} \
274 %{Zseg_addr_table_filename*:-seg_addr_table_filename %*} \
275 %{sub_library*} %{sub_umbrella*} \
276 %{isysroot*:-syslibroot %*} \
277 %{twolevel_namespace} %{twolevel_namespace_hints} \
280 %{Zunexported_symbols_list*:-unexported_symbols_list %*} \
281 %{Zweak_reference_mismatches*:-weak_reference_mismatches %*} \
282 %{!Zweak_reference_mismatches*:-weak_reference_mismatches non-weak} \
286 %{pagezero_size*} %{segs_read_*} %{seglinkedit} %{noseglinkedit} \
287 %{sectalign*} %{sectobjectsymbols*} %{segcreate*} %{whyload} \
288 %{whatsloaded} %{dylinker_install_name*} \
289 %{dylinker} %{Mach} "
292 /* Machine dependent libraries. */
294 #define LIB_SPEC "%{!static:-lSystem}"
296 /* -dynamiclib implies -shared-libgcc just like -shared would on linux. */
297 #define REAL_LIBGCC_SPEC \
298 "%{static|static-libgcc:-lgcc -lgcc_eh}\
299 %{!static:%{!static-libgcc:\
300 %{!Zdynamiclib:%{!shared-libgcc:-lgcc -lgcc_eh}\
301 %{shared-libgcc:-lgcc_s -lgcc}} %{Zdynamiclib:-lgcc_s -lgcc}}}"
303 /* We specify crt0.o as -lcrt0.o so that ld will search the library path. */
304 /* We don't want anything to do with crt2.o in the 64-bit case;
305 testing the PowerPC-specific -m64 flag here is a little irregular,
306 but it's overkill to make copies of this spec for each target
309 #undef STARTFILE_SPEC
310 #define STARTFILE_SPEC \
311 "%{!Zdynamiclib:%{Zbundle:%{!static:-lbundle1.o}} \
312 %{!Zbundle:%{pg:%{static:-lgcrt0.o} \
313 %{!static:%{object:-lgcrt0.o} \
314 %{!object:%{preload:-lgcrt0.o} \
315 %{!preload:-lgcrt1.o %{!m64: crt2.o%s}}}}} \
316 %{!pg:%{static:-lcrt0.o} \
317 %{!static:%{object:-lcrt0.o} \
318 %{!object:%{preload:-lcrt0.o} \
319 %{!preload:-lcrt1.o %{!m64: crt2.o%s}}}}}}}"
321 /* The native Darwin linker doesn't necessarily place files in the order
322 that they're specified on the link line. Thus, it is pointless
323 to put anything in ENDFILE_SPEC. */
324 /* #define ENDFILE_SPEC "" */
326 /* Default Darwin ASM_SPEC, very simple. */
327 #define ASM_SPEC "-arch %(darwin_arch) \
328 %{Zforce_cpusubtype_ALL:-force_cpusubtype_ALL}"
330 /* We use Dbx symbol format. */
332 #define DBX_DEBUGGING_INFO 1
334 /* Also enable Dwarf 2 as an option. */
335 #define DWARF2_DEBUGGING_INFO
336 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
338 #define DEBUG_FRAME_SECTION "__DWARFA,__debug_frame,coalesced,no_toc+strip_static_syms"
339 #define DEBUG_INFO_SECTION "__DWARFA,__debug_info"
340 #define DEBUG_ABBREV_SECTION "__DWARFA,__debug_abbrev"
341 #define DEBUG_ARANGES_SECTION "__DWARFA,__debug_aranges"
342 #define DEBUG_MACINFO_SECTION "__DWARFA,__debug_macinfo"
343 #define DEBUG_LINE_SECTION "__DWARFA,__debug_line"
344 #define DEBUG_LOC_SECTION "__DWARFA,__debug_loc"
345 #define DEBUG_PUBNAMES_SECTION "__DWARFA,__debug_pubnames"
346 #define DEBUG_STR_SECTION "__DWARFA,__debug_str"
347 #define DEBUG_RANGES_SECTION "__DWARFA,__debug_ranges"
349 /* When generating stabs debugging, use N_BINCL entries. */
351 #define DBX_USE_BINCL
353 /* There is no limit to the length of stabs strings. */
355 #define DBX_CONTIN_LENGTH 0
357 /* gdb needs a null N_SO at the end of each file for scattered loading. */
359 #define DBX_OUTPUT_NULL_N_SO_AT_MAIN_SOURCE_FILE_END
361 /* GCC's definition of 'one_only' is the same as its definition of 'weak'. */
362 #define MAKE_DECL_ONE_ONLY(DECL) (DECL_WEAK (DECL) = 1)
364 /* Mach-O supports 'weak imports', and 'weak definitions' in coalesced
365 sections. machopic_select_section ensures that weak variables go in
366 coalesced sections. Weak aliases (or any other kind of aliases) are
367 not supported. Weak symbols that aren't visible outside the .s file
368 are not supported. */
369 #define ASM_WEAKEN_DECL(FILE, DECL, NAME, ALIAS) \
373 warning (0, "alias definitions not supported in Mach-O; ignored"); \
377 if (! DECL_EXTERNAL (DECL) && TREE_PUBLIC (DECL)) \
378 targetm.asm_out.globalize_label (FILE, NAME); \
379 if (DECL_EXTERNAL (DECL)) \
380 fputs ("\t.weak_reference ", FILE); \
381 else if (! lookup_attribute ("weak", DECL_ATTRIBUTES (DECL)) \
382 && lookup_attribute ("weak_import", DECL_ATTRIBUTES (DECL))) \
384 else if (TREE_PUBLIC (DECL)) \
385 fputs ("\t.weak_definition ", FILE); \
388 assemble_name (FILE, NAME); \
389 fputc ('\n', FILE); \
392 /* Darwin has the pthread routines in libSystem, which every program
393 links to, so there's no need for weak-ness for that. */
394 #define GTHREAD_USE_WEAK 0
396 /* The Darwin linker imposes two limitations on common symbols: they
397 can't have hidden visibility, and they can't appear in dylibs. As
398 a consequence, we should never use common symbols to represent
400 #undef USE_COMMON_FOR_ONE_ONLY
401 #define USE_COMMON_FOR_ONE_ONLY 0
403 /* The Darwin linker doesn't want coalesced symbols to appear in
404 a static archive's table of contents. */
405 #undef TARGET_WEAK_NOT_IN_ARCHIVE_TOC
406 #define TARGET_WEAK_NOT_IN_ARCHIVE_TOC 1
408 /* We make exception information linkonce. */
409 #undef TARGET_USES_WEAK_UNWIND_INFO
410 #define TARGET_USES_WEAK_UNWIND_INFO 1
412 /* We need to use a nonlocal label for the start of an EH frame: the
413 Darwin linker requires that a coalesced section start with a label. */
414 #undef FRAME_BEGIN_LABEL
415 #define FRAME_BEGIN_LABEL "EH_frame"
417 /* Emit a label for the FDE corresponding to DECL. EMPTY means
418 emit a label for an empty FDE. */
419 #define TARGET_ASM_EMIT_UNWIND_LABEL darwin_emit_unwind_label
421 /* Our profiling scheme doesn't LP labels and counter words. */
423 #define NO_PROFILE_COUNTERS 1
425 #undef INIT_SECTION_ASM_OP
426 #define INIT_SECTION_ASM_OP
430 #define TARGET_ASM_CONSTRUCTOR machopic_asm_out_constructor
431 #define TARGET_ASM_DESTRUCTOR machopic_asm_out_destructor
433 /* Always prefix with an underscore. */
435 #define USER_LABEL_PREFIX "_"
437 /* Don't output a .file directive. That is only used by the assembler for
439 #undef TARGET_ASM_FILE_START_FILE_DIRECTIVE
440 #define TARGET_ASM_FILE_START_FILE_DIRECTIVE false
442 #undef TARGET_ASM_FILE_END
443 #define TARGET_ASM_FILE_END darwin_file_end
445 #define ASM_OUTPUT_SKIP(FILE,SIZE) \
446 fprintf (FILE, "\t.space "HOST_WIDE_INT_PRINT_UNSIGNED"\n", SIZE)
448 /* Give ObjC methods pretty symbol names. */
450 #undef OBJC_GEN_METHOD_LABEL
451 #define OBJC_GEN_METHOD_LABEL(BUF,IS_INST,CLASS_NAME,CAT_NAME,SEL_NAME,NUM) \
453 sprintf (BUF, "%c[%s(%s) %s]", (IS_INST) ? '-' : '+', \
454 (CLASS_NAME), (CAT_NAME), (SEL_NAME)); \
456 sprintf (BUF, "%c[%s %s]", (IS_INST) ? '-' : '+', \
457 (CLASS_NAME), (SEL_NAME)); \
460 /* The RTTI data (e.g., __ti4name) is common and public (and static),
461 but it does need to be referenced via indirect PIC data pointers.
462 The machopic_define_symbol calls are telling the machopic subsystem
463 that the name *is* defined in this module, so it doesn't need to
464 make them indirect. */
466 #undef ASM_DECLARE_OBJECT_NAME
467 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL) \
469 const char *xname = NAME; \
470 if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF) \
471 xname = IDENTIFIER_POINTER (DECL_NAME (DECL)); \
472 if (! DECL_WEAK (DECL) \
473 && ((TREE_STATIC (DECL) \
474 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
475 || DECL_INITIAL (DECL))) \
476 machopic_define_symbol (DECL_RTL (DECL)); \
477 if ((TREE_STATIC (DECL) \
478 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
479 || DECL_INITIAL (DECL)) \
480 (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false); \
481 ASM_OUTPUT_LABEL (FILE, xname); \
482 /* Darwin doesn't support zero-size objects, so give them a \
484 if (tree_low_cst (DECL_SIZE_UNIT (DECL), 1) == 0) \
485 assemble_zeros (1); \
488 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
490 const char *xname = NAME; \
491 if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF) \
492 xname = IDENTIFIER_POINTER (DECL_NAME (DECL)); \
493 if (! DECL_WEAK (DECL) \
494 && ((TREE_STATIC (DECL) \
495 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
496 || DECL_INITIAL (DECL))) \
497 machopic_define_symbol (DECL_RTL (DECL)); \
498 if ((TREE_STATIC (DECL) \
499 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
500 || DECL_INITIAL (DECL)) \
501 (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false); \
502 ASM_OUTPUT_LABEL (FILE, xname); \
505 #define ASM_DECLARE_CONSTANT_NAME(FILE, NAME, EXP, SIZE) \
507 ASM_OUTPUT_LABEL (FILE, NAME); \
508 /* Darwin doesn't support zero-size objects, so give them a \
511 assemble_zeros (1); \
514 /* Wrap new method names in quotes so the assembler doesn't gag.
515 Make Objective-C internal symbols local. */
517 #undef ASM_OUTPUT_LABELREF
518 #define ASM_OUTPUT_LABELREF(FILE,NAME) \
520 const char *xname = (NAME); \
521 if (! strcmp (xname, "<pic base>")) \
522 machopic_output_function_base_name(FILE); \
523 else if (xname[0] == '&' || xname[0] == '*') \
525 int len = strlen (xname); \
526 if (len > 6 && !strcmp ("$stub", xname + len - 5)) \
527 machopic_validate_stub_or_non_lazy_ptr (xname); \
528 else if (len > 7 && !strcmp ("$stub\"", xname + len - 6)) \
529 machopic_validate_stub_or_non_lazy_ptr (xname); \
530 else if (len > 14 && !strcmp ("$non_lazy_ptr", xname + len - 13)) \
531 machopic_validate_stub_or_non_lazy_ptr (xname); \
532 else if (len > 15 && !strcmp ("$non_lazy_ptr\"", xname + len - 14)) \
533 machopic_validate_stub_or_non_lazy_ptr (xname); \
534 if (xname[1] != '"' && name_needs_quotes (&xname[1])) \
535 fprintf (FILE, "\"%s\"", &xname[1]); \
537 fputs (&xname[1], FILE); \
539 else if (xname[0] == '+' || xname[0] == '-') \
540 fprintf (FILE, "\"%s\"", xname); \
541 else if (!strncmp (xname, "_OBJC_", 6)) \
542 fprintf (FILE, "L%s", xname); \
543 else if (!strncmp (xname, ".objc_class_name_", 17)) \
544 fprintf (FILE, "%s", xname); \
545 else if (xname[0] != '"' && name_needs_quotes (xname)) \
546 fprintf (FILE, "\"%s\"", xname); \
548 asm_fprintf (FILE, "%U%s", xname); \
551 /* Output before executable code. */
552 #undef TEXT_SECTION_ASM_OP
553 #define TEXT_SECTION_ASM_OP "\t.text"
555 /* Output before writable data. */
557 #undef DATA_SECTION_ASM_OP
558 #define DATA_SECTION_ASM_OP "\t.data"
561 #define ALIGN_ASM_OP ".align"
563 #undef ASM_OUTPUT_ALIGN
564 #define ASM_OUTPUT_ALIGN(FILE,LOG) \
566 fprintf (FILE, "\t%s %d\n", ALIGN_ASM_OP, (LOG))
568 /* Ensure correct alignment of bss data. */
570 #undef ASM_OUTPUT_ALIGNED_DECL_LOCAL
571 #define ASM_OUTPUT_ALIGNED_DECL_LOCAL(FILE, DECL, NAME, SIZE, ALIGN) \
573 unsigned HOST_WIDE_INT _new_size = SIZE; \
574 fputs (".lcomm ", (FILE)); \
575 assemble_name ((FILE), (NAME)); \
576 if (_new_size == 0) _new_size = 1; \
577 fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED",%u\n", _new_size, \
578 floor_log2 ((ALIGN) / BITS_PER_UNIT)); \
579 if ((DECL) && ((TREE_STATIC (DECL) \
580 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
581 || DECL_INITIAL (DECL))) \
583 (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false); \
584 machopic_define_symbol (DECL_RTL (DECL)); \
588 /* The maximum alignment which the object file format can support.
589 For Mach-O, this is 2^15. */
591 #undef MAX_OFILE_ALIGNMENT
592 #define MAX_OFILE_ALIGNMENT 0x8000
594 /* Create new Mach-O sections. */
596 #undef SECTION_FUNCTION
597 #define SECTION_FUNCTION(FUNCTION, SECTION, DIRECTIVE, OBJC) \
598 extern void FUNCTION (void); \
602 if (in_section != SECTION) \
605 objc_section_init (); \
607 fputs ("\t" DIRECTIVE "\n", asm_out_file); \
608 in_section = SECTION; \
609 if ((SECTION == in_text_coal) \
610 || (SECTION == in_text_unlikely) \
611 || (SECTION == in_text_unlikely_coal)) \
612 last_text_section = SECTION; \
616 /* Darwin uses many types of special sections. */
618 #undef EXTRA_SECTIONS
619 #define EXTRA_SECTIONS \
620 in_text_coal, in_text_unlikely, in_text_unlikely_coal, \
621 in_const, in_const_data, in_cstring, in_literal4, in_literal8, \
622 in_const_coal, in_const_data_coal, in_data_coal, \
623 in_constructor, in_destructor, in_mod_init, in_mod_term, \
624 in_objc_class, in_objc_meta_class, in_objc_category, \
625 in_objc_class_vars, in_objc_instance_vars, \
626 in_objc_cls_meth, in_objc_inst_meth, \
627 in_objc_cat_cls_meth, in_objc_cat_inst_meth, \
628 in_objc_selector_refs, \
629 in_objc_selector_fixup, \
630 in_objc_symbols, in_objc_module_info, \
631 in_objc_protocol, in_objc_string_object, \
632 in_objc_constant_string_object, \
633 in_objc_image_info, \
634 in_objc_class_names, in_objc_meth_var_names, \
635 in_objc_meth_var_types, in_objc_cls_refs, \
636 in_machopic_nl_symbol_ptr, \
637 in_machopic_lazy_symbol_ptr, \
638 in_machopic_symbol_stub, \
639 in_machopic_symbol_stub1, \
640 in_machopic_picsymbol_stub, \
641 in_machopic_picsymbol_stub1, \
642 in_darwin_exception, in_darwin_eh_frame, \
645 #undef EXTRA_SECTION_FUNCTIONS
646 #define EXTRA_SECTION_FUNCTIONS \
647 static void objc_section_init (void); \
648 SECTION_FUNCTION (text_coal_section, \
650 ".section __TEXT,__textcoal_nt,coalesced," \
651 "pure_instructions", 0) \
652 SECTION_FUNCTION (text_unlikely_coal_section, \
653 in_text_unlikely_coal, \
654 ".section __TEXT,__text_unlikely_coal," \
655 "coalesced,pure_instructions", 0) \
656 SECTION_FUNCTION (const_section, \
659 SECTION_FUNCTION (const_coal_section, \
661 ".section __TEXT,__const_coal,coalesced", 0) \
662 SECTION_FUNCTION (const_data_section, \
665 SECTION_FUNCTION (const_data_coal_section, \
666 in_const_data_coal, \
667 ".section __DATA,__const_coal,coalesced", 0) \
668 SECTION_FUNCTION (data_coal_section, \
670 ".section __DATA,__datacoal_nt,coalesced", 0) \
671 SECTION_FUNCTION (cstring_section, \
674 SECTION_FUNCTION (literal4_section, \
677 SECTION_FUNCTION (literal8_section, \
680 SECTION_FUNCTION (constructor_section, \
683 SECTION_FUNCTION (mod_init_section, \
685 ".mod_init_func", 0) \
686 SECTION_FUNCTION (mod_term_section, \
688 ".mod_term_func", 0) \
689 SECTION_FUNCTION (destructor_section, \
692 SECTION_FUNCTION (objc_class_section, \
695 SECTION_FUNCTION (objc_meta_class_section, \
696 in_objc_meta_class, \
697 ".objc_meta_class", 1) \
698 SECTION_FUNCTION (objc_category_section, \
700 ".objc_category", 1) \
701 SECTION_FUNCTION (objc_class_vars_section, \
702 in_objc_class_vars, \
703 ".objc_class_vars", 1) \
704 SECTION_FUNCTION (objc_instance_vars_section, \
705 in_objc_instance_vars, \
706 ".objc_instance_vars", 1) \
707 SECTION_FUNCTION (objc_cls_meth_section, \
709 ".objc_cls_meth", 1) \
710 SECTION_FUNCTION (objc_inst_meth_section, \
712 ".objc_inst_meth", 1) \
713 SECTION_FUNCTION (objc_cat_cls_meth_section, \
714 in_objc_cat_cls_meth, \
715 ".objc_cat_cls_meth", 1) \
716 SECTION_FUNCTION (objc_cat_inst_meth_section, \
717 in_objc_cat_inst_meth, \
718 ".objc_cat_inst_meth", 1) \
719 SECTION_FUNCTION (objc_selector_refs_section, \
720 in_objc_selector_refs, \
721 ".objc_message_refs", 1) \
722 SECTION_FUNCTION (objc_selector_fixup_section, \
723 in_objc_selector_fixup, \
724 ".section __OBJC, __sel_fixup, regular, no_dead_strip", 1) \
725 SECTION_FUNCTION (objc_symbols_section, \
727 ".objc_symbols", 1) \
728 SECTION_FUNCTION (objc_module_info_section, \
729 in_objc_module_info, \
730 ".objc_module_info", 1) \
731 SECTION_FUNCTION (objc_protocol_section, \
733 ".objc_protocol", 1) \
734 SECTION_FUNCTION (objc_string_object_section, \
735 in_objc_string_object, \
736 ".objc_string_object", 1) \
737 SECTION_FUNCTION (objc_constant_string_object_section, \
738 in_objc_constant_string_object, \
739 ".section __OBJC, __cstring_object, regular, " \
740 "no_dead_strip", 1) \
741 /* Fix-and-Continue image marker. */ \
742 SECTION_FUNCTION (objc_image_info_section, \
743 in_objc_image_info, \
744 ".section __OBJC, __image_info, regular, " \
745 "no_dead_strip", 1) \
746 SECTION_FUNCTION (objc_class_names_section, \
747 in_objc_class_names, \
748 ".objc_class_names", 1) \
749 SECTION_FUNCTION (objc_meth_var_names_section, \
750 in_objc_meth_var_names, \
751 ".objc_meth_var_names", 1) \
752 SECTION_FUNCTION (objc_meth_var_types_section, \
753 in_objc_meth_var_types, \
754 ".objc_meth_var_types", 1) \
755 SECTION_FUNCTION (objc_cls_refs_section, \
757 ".objc_cls_refs", 1) \
759 SECTION_FUNCTION (machopic_lazy_symbol_ptr_section, \
760 in_machopic_lazy_symbol_ptr, \
761 ".lazy_symbol_pointer", 0) \
762 SECTION_FUNCTION (machopic_nl_symbol_ptr_section, \
763 in_machopic_nl_symbol_ptr, \
764 ".non_lazy_symbol_pointer", 0) \
765 SECTION_FUNCTION (machopic_symbol_stub_section, \
766 in_machopic_symbol_stub, \
768 SECTION_FUNCTION (machopic_symbol_stub1_section, \
769 in_machopic_symbol_stub1, \
770 ".section __TEXT,__symbol_stub1,symbol_stubs," \
771 "pure_instructions,16", 0) \
772 SECTION_FUNCTION (machopic_picsymbol_stub_section, \
773 in_machopic_picsymbol_stub, \
774 ".picsymbol_stub", 0) \
775 SECTION_FUNCTION (machopic_picsymbol_stub1_section, \
776 in_machopic_picsymbol_stub1, \
777 ".section __TEXT,__picsymbolstub1,symbol_stubs," \
778 "pure_instructions,32", 0) \
779 SECTION_FUNCTION (darwin_exception_section, \
780 in_darwin_exception, \
781 ".section __DATA,__gcc_except_tab", 0) \
782 SECTION_FUNCTION (darwin_eh_frame_section, \
783 in_darwin_eh_frame, \
784 ".section " EH_FRAME_SECTION_NAME ",__eh_frame" \
785 EH_FRAME_SECTION_ATTR, 0) \
788 objc_section_init (void) \
790 static int been_here = 0; \
792 if (been_here == 0) \
795 /* written, cold -> hot */ \
796 objc_cat_cls_meth_section (); \
797 objc_cat_inst_meth_section (); \
798 objc_string_object_section (); \
799 objc_constant_string_object_section (); \
800 objc_selector_refs_section (); \
801 objc_selector_fixup_section (); \
802 objc_cls_refs_section (); \
803 objc_class_section (); \
804 objc_meta_class_section (); \
805 /* shared, hot -> cold */ \
806 objc_cls_meth_section (); \
807 objc_inst_meth_section (); \
808 objc_protocol_section (); \
809 objc_class_names_section (); \
810 objc_meth_var_types_section (); \
811 objc_meth_var_names_section (); \
812 objc_category_section (); \
813 objc_class_vars_section (); \
814 objc_instance_vars_section (); \
815 objc_module_info_section (); \
816 objc_symbols_section (); \
820 #define READONLY_DATA_SECTION const_section
822 #undef TARGET_ASM_SELECT_SECTION
823 #define TARGET_ASM_SELECT_SECTION machopic_select_section
824 #define USE_SELECT_SECTION_FOR_FUNCTIONS
826 #undef TARGET_ASM_SELECT_RTX_SECTION
827 #define TARGET_ASM_SELECT_RTX_SECTION machopic_select_rtx_section
828 #undef TARGET_ASM_UNIQUE_SECTION
829 #define TARGET_ASM_UNIQUE_SECTION darwin_unique_section
830 #undef TARGET_ASM_FUNCTION_RODATA_SECTION
831 #define TARGET_ASM_FUNCTION_RODATA_SECTION default_no_function_rodata_section
834 #define ASM_DECLARE_UNRESOLVED_REFERENCE(FILE,NAME) \
837 if (MACHOPIC_INDIRECT) \
838 fprintf (FILE, "\t.lazy_reference "); \
840 fprintf (FILE, "\t.reference "); \
841 assemble_name (FILE, NAME); \
842 fprintf (FILE, "\n"); \
846 #define ASM_DECLARE_CLASS_REFERENCE(FILE,NAME) \
849 fprintf (FILE, "\t"); \
850 assemble_name (FILE, NAME); \
851 fprintf (FILE, "=0\n"); \
852 (*targetm.asm_out.globalize_label) (FILE, NAME); \
856 /* Globalizing directive for a label. */
857 #define GLOBAL_ASM_OP ".globl "
858 #define TARGET_ASM_GLOBALIZE_LABEL darwin_globalize_label
860 /* Emit an assembler directive to set visibility for a symbol. Used
861 to support visibility attribute and Darwin's private extern
863 #undef TARGET_ASM_ASSEMBLE_VISIBILITY
864 #define TARGET_ASM_ASSEMBLE_VISIBILITY darwin_assemble_visibility
866 /* Extra attributes for Darwin. */
867 #define SUBTARGET_ATTRIBUTE_TABLE \
868 /* { name, min_len, max_len, decl_req, type_req, fn_type_req, handler } */ \
869 { "weak_import", 0, 0, true, false, false, \
870 darwin_handle_weak_import_attribute }
872 #undef ASM_GENERATE_INTERNAL_LABEL
873 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM) \
874 sprintf (LABEL, "*%s%ld", PREFIX, (long)(NUM))
876 #undef TARGET_ASM_MARK_DECL_PRESERVED
877 #define TARGET_ASM_MARK_DECL_PRESERVED darwin_mark_decl_preserved
879 /* Set on a symbol with SYMBOL_FLAG_FUNCTION or
880 MACHO_SYMBOL_FLAG_VARIABLE to indicate that the function or
881 variable has been defined in this translation unit. */
883 #define MACHO_SYMBOL_FLAG_VARIABLE (SYMBOL_FLAG_MACH_DEP)
884 #define MACHO_SYMBOL_FLAG_DEFINED ((SYMBOL_FLAG_MACH_DEP) << 1)
886 /* Set on a symbol to indicate when fix-and-continue style code
887 generation is being used and the symbol refers to a static symbol
888 that should be rebound from new instances of a translation unit to
889 the original instance of the data. */
891 #define MACHO_SYMBOL_STATIC ((SYMBOL_FLAG_MACH_DEP) << 2)
893 /* Symbolic names for various things we might know about a symbol. */
895 enum machopic_addr_class {
897 MACHOPIC_DEFINED_DATA,
898 MACHOPIC_UNDEFINED_DATA,
899 MACHOPIC_DEFINED_FUNCTION,
900 MACHOPIC_UNDEFINED_FUNCTION
903 /* Macros defining the various PIC cases. */
905 #define MACHO_DYNAMIC_NO_PIC_P (TARGET_DYNAMIC_NO_PIC)
906 #define MACHOPIC_INDIRECT (flag_pic || MACHO_DYNAMIC_NO_PIC_P)
907 #define MACHOPIC_JUST_INDIRECT (flag_pic == 1 || MACHO_DYNAMIC_NO_PIC_P)
908 #define MACHOPIC_PURE (flag_pic == 2 && ! MACHO_DYNAMIC_NO_PIC_P)
910 #undef TARGET_ENCODE_SECTION_INFO
911 #define TARGET_ENCODE_SECTION_INFO darwin_encode_section_info
912 #undef TARGET_STRIP_NAME_ENCODING
913 #define TARGET_STRIP_NAME_ENCODING default_strip_name_encoding
915 #define GEN_BINDER_NAME_FOR_STUB(BUF,STUB,STUB_LENGTH) \
917 const char *const stub_ = (STUB); \
918 char *buffer_ = (BUF); \
919 strcpy (buffer_, stub_); \
920 if (stub_[0] == '"') \
922 strcpy (buffer_ + (STUB_LENGTH) - 1, "_binder\""); \
926 strcpy (buffer_ + (STUB_LENGTH), "_binder"); \
930 #define GEN_SYMBOL_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH) \
932 const char *const symbol_ = (SYMBOL); \
933 char *buffer_ = (BUF); \
934 if (name_needs_quotes (symbol_) && symbol_[0] != '"') \
936 sprintf (buffer_, "\"%s\"", symbol_); \
940 strcpy (buffer_, symbol_); \
944 /* Given a symbol name string, create the lazy pointer version
945 of the symbol name. */
947 #define GEN_LAZY_PTR_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH) \
949 const char *symbol_ = (SYMBOL); \
950 char *buffer_ = (BUF); \
951 if (symbol_[0] == '"') \
953 strcpy (buffer_, "\"L"); \
954 strcpy (buffer_ + 2, symbol_ + 1); \
955 strcpy (buffer_ + (SYMBOL_LENGTH), "$lazy_ptr\""); \
957 else if (name_needs_quotes (symbol_)) \
959 strcpy (buffer_, "\"L"); \
960 strcpy (buffer_ + 2, symbol_); \
961 strcpy (buffer_ + (SYMBOL_LENGTH) + 2, "$lazy_ptr\""); \
965 strcpy (buffer_, "L"); \
966 strcpy (buffer_ + 1, symbol_); \
967 strcpy (buffer_ + (SYMBOL_LENGTH) + 1, "$lazy_ptr"); \
971 #define TARGET_ASM_EXCEPTION_SECTION darwin_exception_section
973 #define TARGET_ASM_EH_FRAME_SECTION darwin_eh_frame_section
975 #define EH_FRAME_SECTION_NAME "__TEXT"
976 #define EH_FRAME_SECTION_ATTR ",coalesced,no_toc+strip_static_syms+live_support"
978 /* Java runtime class list. */
979 #define JCR_SECTION_NAME "__DATA,jcr,regular,no_dead_strip"
981 #undef ASM_PREFERRED_EH_DATA_FORMAT
982 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL) \
983 (((CODE) == 2 && (GLOBAL) == 1) \
984 ? (DW_EH_PE_pcrel | DW_EH_PE_indirect | DW_EH_PE_sdata4) : \
985 ((CODE) == 1 || (GLOBAL) == 0) ? DW_EH_PE_pcrel : DW_EH_PE_absptr)
987 #define ASM_OUTPUT_DWARF_DELTA(FILE,SIZE,LABEL1,LABEL2) \
988 darwin_asm_output_dwarf_delta (FILE, SIZE, LABEL1, LABEL2)
990 #define ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX(ASM_OUT_FILE, ENCODING, SIZE, ADDR, DONE) \
991 if (ENCODING == ASM_PREFERRED_EH_DATA_FORMAT (2, 1)) { \
992 darwin_non_lazy_pcrel (ASM_OUT_FILE, ADDR); \
996 /* Experimentally, putting jump tables in text is faster on SPEC.
997 Also this is needed for correctness for coalesced functions. */
999 #ifndef JUMP_TABLES_IN_TEXT_SECTION
1000 #define JUMP_TABLES_IN_TEXT_SECTION 1
1003 #define TARGET_TERMINATE_DW2_EH_FRAME_INFO false
1005 #undef TARGET_ASM_NAMED_SECTION
1006 #define TARGET_ASM_NAMED_SECTION darwin_asm_named_section
1008 #define DARWIN_REGISTER_TARGET_PRAGMAS() \
1010 c_register_pragma (0, "mark", darwin_pragma_ignore); \
1011 c_register_pragma (0, "options", darwin_pragma_options); \
1012 c_register_pragma (0, "segment", darwin_pragma_ignore); \
1013 c_register_pragma (0, "unused", darwin_pragma_unused); \
1017 #define ASM_APP_ON ""
1019 #define ASM_APP_OFF ""
1021 void darwin_register_frameworks (const char *, const char *, int);
1022 void darwin_register_objc_includes (const char *, const char *, int);
1023 #define TARGET_EXTRA_PRE_INCLUDES darwin_register_objc_includes
1024 #define TARGET_EXTRA_INCLUDES darwin_register_frameworks
1026 void add_framework_path (char *);
1027 #define TARGET_OPTF add_framework_path
1029 #define TARGET_POSIX_IO
1031 /* All new versions of Darwin have C99 functions. */
1032 #define TARGET_C99_FUNCTIONS 1
1034 #define WINT_TYPE "int"
1036 #endif /* CONFIG_DARWIN_H */