1 /* Target definitions for Darwin (Mac OS X) systems.
2 Copyright (C) 1989, 1990, 1991, 1992, 1993, 2000, 2001, 2002, 2003, 2004
3 Free Software Foundation, Inc.
4 Contributed by Apple Computer Inc.
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
13 GCC is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING. If not, write to
20 the Free Software Foundation, 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
23 #ifndef CONFIG_DARWIN_H
24 #define CONFIG_DARWIN_H
26 /* The definitions in this file are common to all processor types
27 running Darwin, which is the kernel for Mac OS X. Darwin is
28 basically a BSD user layer laid over a Mach kernel, then evolved
29 for many years (at NeXT) in parallel with other Unix systems. So
30 while the runtime is a somewhat idiosyncratic Mach-based thing,
31 other definitions look like they would for a BSD variant. */
33 /* Although NeXT ran on many different architectures, as of Jan 2001
34 the only supported Darwin targets are PowerPC and x86. */
36 /* One of Darwin's NeXT legacies is the Mach-O format, which is partly
37 like a.out and partly like COFF, with additional features like
38 multi-architecture binary support. */
40 #define OBJECT_FORMAT_MACHO
42 /* Suppress g++ attempt to link in the math library automatically. */
43 #define MATH_LIBRARY ""
49 /* Define an empty body for the function do_global_dtors() in libgcc2.c. */
51 #define DO_GLOBAL_DTORS_BODY
53 /* The string value for __SIZE_TYPE__. */
56 #define SIZE_TYPE "long unsigned int"
59 /* Type used for ptrdiff_t, as a string used in a declaration. */
62 #define PTRDIFF_TYPE "int"
67 #define WCHAR_TYPE "int"
68 #undef WCHAR_TYPE_SIZE
69 #define WCHAR_TYPE_SIZE 32
71 /* Default to using the NeXT-style runtime, since that's what is
72 pre-installed on Darwin systems. */
74 #define NEXT_OBJC_RUNTIME
76 /* Don't default to pcc-struct-return, because gcc is the only compiler, and
77 we want to retain compatibility with older gcc versions. */
79 #undef DEFAULT_PCC_STRUCT_RETURN
80 #define DEFAULT_PCC_STRUCT_RETURN 0
82 /* This table intercepts weirdo options whose names would interfere
83 with normal driver conventions, and either translates them into
84 standardly-named options, or adds a 'Z' so that they can get to
85 specs processing without interference.
87 Do not expand a linker option to "-Xlinker -<option>", since that
88 forfeits the ability to control via spec strings later. However,
89 as a special exception, do this translation with -filelist, because
90 otherwise the driver will think there are no input files and quit.
91 (The alternative would be to hack the driver to recognize -filelist
92 specially, but it's simpler to use the translation table.)
94 Note that an option name with a prefix that matches another option
95 name, that also takes an argument, needs to be modified so the
96 prefix is different, otherwise a '*' after the shorter option will
97 match with the longer one.
99 The SUBTARGET_OPTION_TRANSLATE_TABLE macro, which _must_ be defined
100 in gcc/config/{i386,rs6000}/darwin.h, should contain any additional
101 command-line option translations specific to the particular target
104 #define TARGET_OPTION_TRANSLATE_TABLE \
105 { "-all_load", "-Zall_load" }, \
106 { "-allowable_client", "-Zallowable_client" }, \
107 { "-arch_errors_fatal", "-Zarch_errors_fatal" }, \
108 { "-bind_at_load", "-Zbind_at_load" }, \
109 { "-bundle", "-Zbundle" }, \
110 { "-bundle_loader", "-Zbundle_loader" }, \
111 { "-weak_reference_mismatches", "-Zweak_reference_mismatches" }, \
112 { "-dependency-file", "-MF" }, \
113 { "-dylib_file", "-Zdylib_file" }, \
114 { "-dynamic", "-Zdynamic" }, \
115 { "-dynamiclib", "-Zdynamiclib" }, \
116 { "-exported_symbols_list", "-Zexported_symbols_list" }, \
117 { "-seg_addr_table_filename", "-Zseg_addr_table_filename" }, \
118 { "-filelist", "-Xlinker -filelist -Xlinker" }, \
119 { "-framework", "-Xlinker -framework -Xlinker" }, \
120 { "-flat_namespace", "-Zflat_namespace" }, \
121 { "-force_cpusubtype_ALL", "-Zforce_cpusubtype_ALL" }, \
122 { "-force_flat_namespace", "-Zforce_flat_namespace" }, \
123 { "-image_base", "-Zimage_base" }, \
124 { "-init", "-Zinit" }, \
125 { "-install_name", "-Zinstall_name" }, \
126 { "-multiply_defined_unused", "-Zmultiplydefinedunused" }, \
127 { "-multiply_defined", "-Zmultiply_defined" }, \
128 { "-multi_module", "-Zmulti_module" }, \
129 { "-static", "-static -Wa,-static" }, \
130 { "-single_module", "-Zsingle_module" }, \
131 { "-unexported_symbols_list", "-Zunexported_symbols_list" }, \
132 SUBTARGET_OPTION_TRANSLATE_TABLE
134 /* These compiler options take n arguments. */
136 #undef WORD_SWITCH_TAKES_ARG
137 #define WORD_SWITCH_TAKES_ARG(STR) \
138 (DEFAULT_WORD_SWITCH_TAKES_ARG (STR) ? 1 : \
139 !strcmp (STR, "Zallowable_client") ? 1 : \
140 !strcmp (STR, "arch") ? 1 : \
141 !strcmp (STR, "arch_only") ? 1 : \
142 !strcmp (STR, "Zbundle_loader") ? 1 : \
143 !strcmp (STR, "client_name") ? 1 : \
144 !strcmp (STR, "compatibility_version") ? 1 : \
145 !strcmp (STR, "current_version") ? 1 : \
146 !strcmp (STR, "Zdylib_file") ? 1 : \
147 !strcmp (STR, "Zexported_symbols_list") ? 1 : \
148 !strcmp (STR, "Zimage_base") ? 1 : \
149 !strcmp (STR, "Zinit") ? 1 : \
150 !strcmp (STR, "Zinstall_name") ? 1 : \
151 !strcmp (STR, "Zmultiplydefinedunused") ? 1 : \
152 !strcmp (STR, "Zmultiply_defined") ? 1 : \
153 !strcmp (STR, "precomp-trustfile") ? 1 : \
154 !strcmp (STR, "read_only_relocs") ? 1 : \
155 !strcmp (STR, "sectcreate") ? 3 : \
156 !strcmp (STR, "sectorder") ? 3 : \
157 !strcmp (STR, "Zseg_addr_table_filename") ?1 :\
158 !strcmp (STR, "seg1addr") ? 1 : \
159 !strcmp (STR, "segprot") ? 3 : \
160 !strcmp (STR, "seg_addr_table") ? 1 : \
161 !strcmp (STR, "sub_library") ? 1 : \
162 !strcmp (STR, "sub_umbrella") ? 1 : \
163 !strcmp (STR, "umbrella") ? 1 : \
164 !strcmp (STR, "undefined") ? 1 : \
165 !strcmp (STR, "Zunexported_symbols_list") ? 1 : \
166 !strcmp (STR, "Zweak_reference_mismatches") ? 1 : \
167 !strcmp (STR, "pagezero_size") ? 1 : \
168 !strcmp (STR, "segs_read_only_addr") ? 1 : \
169 !strcmp (STR, "segs_read_write_addr") ? 1 : \
170 !strcmp (STR, "sectalign") ? 3 : \
171 !strcmp (STR, "sectobjectsymbols") ? 2 : \
172 !strcmp (STR, "segcreate") ? 3 : \
173 !strcmp (STR, "dylinker_install_name") ? 1 : \
176 /* Machine dependent cpp options. __APPLE_CC__ is defined as the
177 Apple include files expect it to be defined and won't work if it
181 #define CPP_SPEC "%{static:%{!dynamic:-D__STATIC__}}%{!static:-D__DYNAMIC__}\
184 /* This is mostly a clone of the standard LINK_COMMAND_SPEC, plus
185 precomp, libtool, and fat build additions. Also we
186 don't specify a second %G after %L because libSystem is
187 self-contained and doesn't need to link against libgcc.a. */
188 /* In general, random Darwin linker flags should go into LINK_SPEC
189 instead of LINK_COMMAND_SPEC. The command spec is better for
190 specifying the handling of options understood by generic Unix
191 linkers, and for positional arguments like libraries. */
192 #define LINK_COMMAND_SPEC "\
193 %{!fdump=*:%{!fsyntax-only:%{!precomp:%{!c:%{!M:%{!MM:%{!E:%{!S:\
194 %{!Zdynamiclib:%(linker)}%{Zdynamiclib:/usr/bin/libtool} \
195 %{!Zdynamiclib:-arch %(darwin_arch)} \
196 %{Zdynamiclib:-arch_only %(darwin_arch)} \
197 %l %X %{d} %{s} %{t} %{Z} \
198 %{!Zdynamiclib:%{A} %{e*} %{m} %{N} %{n} %{r} %{u*} %{x} %{z}} \
199 %{@:-o %f%u.out}%{!@:%{o*}%{!o:-o a.out}} \
200 %{!Zdynamiclib:%{!A:%{!nostdlib:%{!nostartfiles:%S}}}} \
201 %{L*} %(link_libgcc) %o %{fprofile-arcs|fprofile-generate:-lgcov} \
202 %{!nostdlib:%{!nodefaultlibs:%G %L}} \
203 %{!A:%{!nostdlib:%{!nostartfiles:%E}}} %{T*} %{F*} }}}}}}}}"
205 /* Please keep the random linker options in alphabetical order (modulo
206 'Z' and 'no' prefixes). Options that can only go to one of libtool
207 or ld must be listed twice, under both !Zdynamiclib and
208 Zdynamiclib, with one of the cases reporting an error. */
209 /* Note that options taking arguments may appear multiple times on a
210 command line with different arguments each time, so put a * after
211 their names so all of them get passed. */
213 "%{static}%{!static:-dynamic} \
216 %{Zbundle_loader*:-bundle_loader %*} \
218 %{compatibility_version*:%e-compatibility_version only allowed with -dynamiclib\
220 %{current_version*:%e-current_version only allowed with -dynamiclib} \
221 %{Zforce_cpusubtype_ALL:-force_cpusubtype_ALL} \
222 %{Zforce_flat_namespace:-force_flat_namespace} \
223 %{Zinstall_name*:%e-install_name only allowed with -dynamiclib} \
224 %{keep_private_externs} \
228 %{Zbundle:%e-bundle not allowed with -dynamiclib} \
229 %{Zbundle_loader*:%e-bundle_loader not allowed with -dynamiclib} \
230 %{client_name*:%e-client_name not allowed with -dynamiclib} \
231 %{compatibility_version*} \
232 %{current_version*} \
233 %{Zforce_cpusubtype_ALL:%e-force_cpusubtype_ALL not allowed with -dynamiclib} \
234 %{Zforce_flat_namespace:%e-force_flat_namespace not allowed with -dynamiclib} \
235 %{Zinstall_name*:-install_name %*} \
236 %{keep_private_externs:%e-keep_private_externs not allowed with -dynamiclib} \
237 %{private_bundle:%e-private_bundle not allowed with -dynamiclib} \
239 %{Zall_load:-all_load}%{Zdynamiclib:%{!Zall_load:-noall_load}} \
240 %{Zallowable_client*:-allowable_client %*} \
241 %{Zbind_at_load:-bind_at_load} \
242 %{Zarch_errors_fatal:-arch_errors_fatal} \
243 %{Zdylib_file*:-dylib_file %*} \
244 %{Zdynamic:-dynamic}\
245 %{Zexported_symbols_list*:-exported_symbols_list %*} \
246 %{Zflat_namespace:-flat_namespace} \
247 %{headerpad_max_install_names*} \
248 %{Zimage_base*:-image_base %*} \
251 %{Zmulti_module:-multi_module} %{Zsingle_module:-single_module} \
252 %{Zmultiply_defined*:-multiply_defined %*} \
253 %{Zmultiplydefinedunused*:-multiply_defined_unused %*} \
254 %{prebind} %{noprebind} %{nofixprebinding} %{prebind_all_twolevel_modules} \
255 %{read_only_relocs} \
256 %{sectcreate*} %{sectorder*} %{seg1addr*} %{segprot*} %{seg_addr_table*} \
257 %{Zseg_addr_table_filename*:-seg_addr_table_filename %*} \
258 %{sub_library*} %{sub_umbrella*} \
259 %{twolevel_namespace} %{twolevel_namespace_hints} \
262 %{Zunexported_symbols_list*:-unexported_symbols_list %*} \
263 %{Zweak_reference_mismatches*:-weak_reference_mismatches %*} \
267 %{pagezero_size*} %{segs_read_*} %{seglinkedit} %{noseglinkedit} \
268 %{sectalign*} %{sectobjectsymbols*} %{segcreate*} %{whyload} \
269 %{whatsloaded} %{dylinker_install_name*} \
270 %{dylinker} %{Mach} "
273 /* Machine dependent libraries but do not redefine it if we already on 7.0 and
274 above as it needs to link with libmx also. */
277 #define LIB_SPEC "%{!static:-lSystem}"
280 /* We specify crt0.o as -lcrt0.o so that ld will search the library path. */
282 #undef STARTFILE_SPEC
283 #define STARTFILE_SPEC \
284 "%{!Zdynamiclib:%{Zbundle:%{!static:-lbundle1.o}} \
285 %{!Zbundle:%{pg:%{static:-lgcrt0.o} \
286 %{!static:%{object:-lgcrt0.o} \
287 %{!object:%{preload:-lgcrt0.o} \
288 %{!preload:-lgcrt1.o crt2.o%s}}}} \
289 %{!pg:%{static:-lcrt0.o} \
290 %{!static:%{object:-lcrt0.o} \
291 %{!object:%{preload:-lcrt0.o} \
292 %{!preload:-lcrt1.o crt2.o%s}}}}}}"
294 /* The native Darwin linker doesn't necessarily place files in the order
295 that they're specified on the link line. Thus, it is pointless
296 to put anything in ENDFILE_SPEC. */
297 /* #define ENDFILE_SPEC "" */
299 /* We use Dbx symbol format. */
301 #define DBX_DEBUGGING_INFO 1
303 /* Also enable Dwarf 2 as an option. */
304 #define DWARF2_DEBUGGING_INFO
305 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
307 #define DEBUG_FRAME_SECTION "__DWARFA,__debug_frame,coalesced,no_toc+strip_static_syms"
308 #define DEBUG_INFO_SECTION "__DWARFA,__debug_info"
309 #define DEBUG_ABBREV_SECTION "__DWARFA,__debug_abbrev"
310 #define DEBUG_ARANGES_SECTION "__DWARFA,__debug_aranges"
311 #define DEBUG_MACINFO_SECTION "__DWARFA,__debug_macinfo"
312 #define DEBUG_LINE_SECTION "__DWARFA,__debug_line"
313 #define DEBUG_LOC_SECTION "__DWARFA,__debug_loc"
314 #define DEBUG_PUBNAMES_SECTION "__DWARFA,__debug_pubnames"
315 #define DEBUG_STR_SECTION "__DWARFA,__debug_str"
316 #define DEBUG_RANGES_SECTION "__DWARFA,__debug_ranges"
318 /* When generating stabs debugging, use N_BINCL entries. */
320 #define DBX_USE_BINCL
322 /* There is no limit to the length of stabs strings. */
324 #define DBX_CONTIN_LENGTH 0
326 /* gdb needs a null N_SO at the end of each file for scattered loading. */
328 #undef DBX_OUTPUT_MAIN_SOURCE_FILE_END
329 #define DBX_OUTPUT_MAIN_SOURCE_FILE_END(FILE, FILENAME) \
330 do { text_section (); \
332 "\t.stabs \"%s\",%d,0,0,Letext\nLetext:\n", "" , N_SO); \
335 /* Making a symbols weak on Darwin requires more than just setting DECL_WEAK. */
336 #define MAKE_DECL_ONE_ONLY(DECL) darwin_make_decl_one_only (DECL)
338 /* Representation of linkonce symbols for the MACH-O assembler. Linkonce
339 symbols must be given a special section *and* must be preceded by a
340 special assembler directive. */
341 #define ASM_MAKE_LABEL_LINKONCE(FILE, NAME) \
342 do { const char* _x = (NAME); if (!!strncmp (_x, "_OBJC_", 6)) { \
343 fputs (".weak_definition ", FILE); assemble_name (FILE, _x); \
344 fputs ("\n", FILE); }} while (0)
346 /* We support hidden visibility */
347 #undef TARGET_SUPPORTS_HIDDEN
348 #define TARGET_SUPPORTS_HIDDEN 1
350 /* The Darwin linker imposes two limitations on common symbols: they
351 can't have hidden visibility, and they can't appear in dylibs. As
352 a consequence, we should never use common symbols to represent
354 #undef USE_COMMON_FOR_ONE_ONLY
355 #define USE_COMMON_FOR_ONE_ONLY 0
357 /* The Darwin linker doesn't want coalesced symbols to appear in
358 a static archive's table of contents. */
359 #undef TARGET_WEAK_NOT_IN_ARCHIVE_TOC
360 #define TARGET_WEAK_NOT_IN_ARCHIVE_TOC 1
362 /* We make exception information linkonce. */
363 #undef TARGET_USES_WEAK_UNWIND_INFO
364 #define TARGET_USES_WEAK_UNWIND_INFO 1
366 /* We need to use a nonlocal label for the start of an EH frame: the
367 Darwin linker requires that a coalesced section start with a label. */
368 #undef FRAME_BEGIN_LABEL
369 #define FRAME_BEGIN_LABEL "EH_frame"
371 /* Emit a label for the FDE corresponding to DECL. EMPTY means
372 emit a label for an empty FDE. */
373 #define TARGET_ASM_EMIT_UNWIND_LABEL darwin_emit_unwind_label
375 /* Our profiling scheme doesn't LP labels and counter words. */
377 #define NO_PROFILE_COUNTERS 1
379 #undef INIT_SECTION_ASM_OP
380 #define INIT_SECTION_ASM_OP
384 #define TARGET_ASM_CONSTRUCTOR machopic_asm_out_constructor
385 #define TARGET_ASM_DESTRUCTOR machopic_asm_out_destructor
387 /* Always prefix with an underscore. */
389 #define USER_LABEL_PREFIX "_"
391 /* Don't output a .file directive. That is only used by the assembler for
393 #undef TARGET_ASM_FILE_START_FILE_DIRECTIVE
394 #define TARGET_ASM_FILE_START_FILE_DIRECTIVE false
396 #undef TARGET_ASM_FILE_END
397 #define TARGET_ASM_FILE_END darwin_file_end
399 #define ASM_OUTPUT_SKIP(FILE,SIZE) \
400 fprintf (FILE, "\t.space "HOST_WIDE_INT_PRINT_UNSIGNED"\n", SIZE)
402 /* Give ObjC methods pretty symbol names. */
404 #undef OBJC_GEN_METHOD_LABEL
405 #define OBJC_GEN_METHOD_LABEL(BUF,IS_INST,CLASS_NAME,CAT_NAME,SEL_NAME,NUM) \
407 sprintf (BUF, "%c[%s(%s) %s]", (IS_INST) ? '-' : '+', \
408 (CLASS_NAME), (CAT_NAME), (SEL_NAME)); \
410 sprintf (BUF, "%c[%s %s]", (IS_INST) ? '-' : '+', \
411 (CLASS_NAME), (SEL_NAME)); \
414 /* The RTTI data (e.g., __ti4name) is common and public (and static),
415 but it does need to be referenced via indirect PIC data pointers.
416 The machopic_define_name calls are telling the machopic subsystem
417 that the name *is* defined in this module, so it doesn't need to
418 make them indirect. */
420 #undef ASM_DECLARE_OBJECT_NAME
421 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL) \
423 const char *xname = NAME; \
424 if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF) \
425 xname = IDENTIFIER_POINTER (DECL_NAME (DECL)); \
426 if (! DECL_ONE_ONLY (DECL) && ! DECL_WEAK (DECL)) \
427 if ((TREE_STATIC (DECL) \
428 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
429 || DECL_INITIAL (DECL)) \
430 machopic_define_name (xname); \
431 if ((TREE_STATIC (DECL) \
432 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
433 || DECL_INITIAL (DECL)) \
434 (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false); \
435 ASM_OUTPUT_LABEL (FILE, xname); \
436 /* Darwin doesn't support zero-size objects, so give them a \
438 if (tree_low_cst (DECL_SIZE_UNIT (DECL), 1) == 0) \
439 assemble_zeros (1); \
442 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
444 const char *xname = NAME; \
445 if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF) \
446 xname = IDENTIFIER_POINTER (DECL_NAME (DECL)); \
447 if (! DECL_ONE_ONLY (DECL) && ! DECL_WEAK (DECL)) \
448 if ((TREE_STATIC (DECL) \
449 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
450 || DECL_INITIAL (DECL)) \
451 machopic_define_name (xname); \
452 if ((TREE_STATIC (DECL) \
453 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
454 || DECL_INITIAL (DECL)) \
455 (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false); \
456 ASM_OUTPUT_LABEL (FILE, xname); \
459 #define ASM_DECLARE_CONSTANT_NAME(FILE, NAME, EXP, SIZE) \
461 ASM_OUTPUT_LABEL (FILE, NAME); \
462 /* Darwin doesn't support zero-size objects, so give them a \
465 assemble_zeros (1); \
468 /* Wrap new method names in quotes so the assembler doesn't gag.
469 Make Objective-C internal symbols local. */
471 #undef ASM_OUTPUT_LABELREF
472 #define ASM_OUTPUT_LABELREF(FILE,NAME) \
474 const char *xname = darwin_strip_name_encoding (NAME); \
475 if (! strcmp (xname, "<pic base>")) \
476 machopic_output_function_base_name(FILE); \
477 else if (xname[0] == '&' || xname[0] == '*') \
479 int len = strlen (xname); \
480 if (len > 6 && !strcmp ("$stub", xname + len - 5)) \
481 machopic_validate_stub_or_non_lazy_ptr (xname, 1); \
482 else if (len > 7 && !strcmp ("$stub\"", xname + len - 6)) \
483 machopic_validate_stub_or_non_lazy_ptr (xname, 1); \
484 else if (len > 14 && !strcmp ("$non_lazy_ptr", xname + len - 13)) \
485 machopic_validate_stub_or_non_lazy_ptr (xname, 0); \
486 fputs (&xname[1], FILE); \
488 else if (xname[0] == '+' || xname[0] == '-') \
489 fprintf (FILE, "\"%s\"", xname); \
490 else if (!strncmp (xname, "_OBJC_", 6)) \
491 fprintf (FILE, "L%s", xname); \
492 else if (!strncmp (xname, ".objc_class_name_", 17)) \
493 fprintf (FILE, "%s", xname); \
495 asm_fprintf (FILE, "%U%s", xname); \
498 /* Output before executable code. */
499 #undef TEXT_SECTION_ASM_OP
500 #define TEXT_SECTION_ASM_OP ".text"
502 /* Output before writable data. */
504 #undef DATA_SECTION_ASM_OP
505 #define DATA_SECTION_ASM_OP ".data"
508 #define ALIGN_ASM_OP ".align"
510 #undef ASM_OUTPUT_ALIGN
511 #define ASM_OUTPUT_ALIGN(FILE,LOG) \
513 fprintf (FILE, "\t%s %d\n", ALIGN_ASM_OP, (LOG))
515 /* Ensure correct alignment of bss data. */
517 #undef ASM_OUTPUT_ALIGNED_DECL_LOCAL
518 #define ASM_OUTPUT_ALIGNED_DECL_LOCAL(FILE, DECL, NAME, SIZE, ALIGN) \
520 fputs (".lcomm ", (FILE)); \
521 assemble_name ((FILE), (NAME)); \
522 fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED",%u\n", (SIZE), \
523 floor_log2 ((ALIGN) / BITS_PER_UNIT)); \
524 if ((DECL) && ((TREE_STATIC (DECL) \
525 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
526 || DECL_INITIAL (DECL))) \
527 (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false); \
528 if ((DECL) && ((TREE_STATIC (DECL) \
529 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
530 || DECL_INITIAL (DECL))) \
531 machopic_define_name (NAME); \
534 /* The maximum alignment which the object file format can support.
535 For Mach-O, this is 2^15. */
537 #undef MAX_OFILE_ALIGNMENT
538 #define MAX_OFILE_ALIGNMENT 0x8000
540 /* Create new Mach-O sections. */
542 #undef SECTION_FUNCTION
543 #define SECTION_FUNCTION(FUNCTION, SECTION, DIRECTIVE, OBJC) \
544 extern void FUNCTION (void); \
548 if (in_section != SECTION) \
551 objc_section_init (); \
554 fprintf (asm_out_file, "%s\n", DIRECTIVE); \
555 in_section = SECTION; \
559 /* Darwin uses many types of special sections. */
561 #undef EXTRA_SECTIONS
562 #define EXTRA_SECTIONS \
563 in_const, in_const_data, in_cstring, in_literal4, in_literal8, \
564 in_constructor, in_destructor, in_mod_init, in_mod_term, \
565 in_objc_class, in_objc_meta_class, in_objc_category, \
566 in_objc_class_vars, in_objc_instance_vars, \
567 in_objc_cls_meth, in_objc_inst_meth, \
568 in_objc_cat_cls_meth, in_objc_cat_inst_meth, \
569 in_objc_selector_refs, \
570 in_objc_selector_fixup, \
571 in_objc_symbols, in_objc_module_info, \
572 in_objc_protocol, in_objc_string_object, \
573 in_objc_constant_string_object, \
574 in_objc_image_info, \
575 in_objc_class_names, in_objc_meth_var_names, \
576 in_objc_meth_var_types, in_objc_cls_refs, \
577 in_machopic_nl_symbol_ptr, \
578 in_machopic_lazy_symbol_ptr, \
579 in_machopic_symbol_stub, \
580 in_machopic_symbol_stub1, \
581 in_machopic_picsymbol_stub, \
582 in_machopic_picsymbol_stub1, \
583 in_darwin_exception, in_darwin_eh_frame, \
586 #undef EXTRA_SECTION_FUNCTIONS
587 #define EXTRA_SECTION_FUNCTIONS \
588 static void objc_section_init (void); \
589 SECTION_FUNCTION (const_section, \
592 SECTION_FUNCTION (const_data_section, \
595 SECTION_FUNCTION (cstring_section, \
598 SECTION_FUNCTION (literal4_section, \
601 SECTION_FUNCTION (literal8_section, \
604 SECTION_FUNCTION (constructor_section, \
607 SECTION_FUNCTION (mod_init_section, \
609 ".mod_init_func", 0) \
610 SECTION_FUNCTION (mod_term_section, \
612 ".mod_term_func", 0) \
613 SECTION_FUNCTION (destructor_section, \
616 SECTION_FUNCTION (objc_class_section, \
619 SECTION_FUNCTION (objc_meta_class_section, \
620 in_objc_meta_class, \
621 ".objc_meta_class", 1) \
622 SECTION_FUNCTION (objc_category_section, \
624 ".objc_category", 1) \
625 SECTION_FUNCTION (objc_class_vars_section, \
626 in_objc_class_vars, \
627 ".objc_class_vars", 1) \
628 SECTION_FUNCTION (objc_instance_vars_section, \
629 in_objc_instance_vars, \
630 ".objc_instance_vars", 1) \
631 SECTION_FUNCTION (objc_cls_meth_section, \
633 ".objc_cls_meth", 1) \
634 SECTION_FUNCTION (objc_inst_meth_section, \
636 ".objc_inst_meth", 1) \
637 SECTION_FUNCTION (objc_cat_cls_meth_section, \
638 in_objc_cat_cls_meth, \
639 ".objc_cat_cls_meth", 1) \
640 SECTION_FUNCTION (objc_cat_inst_meth_section, \
641 in_objc_cat_inst_meth, \
642 ".objc_cat_inst_meth", 1) \
643 SECTION_FUNCTION (objc_selector_refs_section, \
644 in_objc_selector_refs, \
645 ".objc_message_refs", 1) \
646 SECTION_FUNCTION (objc_selector_fixup_section, \
647 in_objc_selector_fixup, \
648 ".section __OBJC, __sel_fixup", 1) \
649 SECTION_FUNCTION (objc_symbols_section, \
651 ".objc_symbols", 1) \
652 SECTION_FUNCTION (objc_module_info_section, \
653 in_objc_module_info, \
654 ".objc_module_info", 1) \
655 SECTION_FUNCTION (objc_protocol_section, \
657 ".objc_protocol", 1) \
658 SECTION_FUNCTION (objc_string_object_section, \
659 in_objc_string_object, \
660 ".objc_string_object", 1) \
661 SECTION_FUNCTION (objc_constant_string_object_section, \
662 in_objc_constant_string_object, \
663 ".section __OBJC, __cstring_object", 1) \
664 /* Fix-and-Continue image marker. */ \
665 SECTION_FUNCTION (objc_image_info_section, \
666 in_objc_image_info, \
667 ".section __OBJC, __image_info", 1) \
668 SECTION_FUNCTION (objc_class_names_section, \
669 in_objc_class_names, \
670 ".objc_class_names", 1) \
671 SECTION_FUNCTION (objc_meth_var_names_section, \
672 in_objc_meth_var_names, \
673 ".objc_meth_var_names", 1) \
674 SECTION_FUNCTION (objc_meth_var_types_section, \
675 in_objc_meth_var_types, \
676 ".objc_meth_var_types", 1) \
677 SECTION_FUNCTION (objc_cls_refs_section, \
679 ".objc_cls_refs", 1) \
681 SECTION_FUNCTION (machopic_lazy_symbol_ptr_section, \
682 in_machopic_lazy_symbol_ptr, \
683 ".lazy_symbol_pointer", 0) \
684 SECTION_FUNCTION (machopic_nl_symbol_ptr_section, \
685 in_machopic_nl_symbol_ptr, \
686 ".non_lazy_symbol_pointer", 0) \
687 SECTION_FUNCTION (machopic_symbol_stub_section, \
688 in_machopic_symbol_stub, \
690 SECTION_FUNCTION (machopic_symbol_stub1_section, \
691 in_machopic_symbol_stub1, \
692 ".section __TEXT,__symbol_stub1,symbol_stubs,pure_instructions,16", 0)\
693 SECTION_FUNCTION (machopic_picsymbol_stub_section, \
694 in_machopic_picsymbol_stub, \
695 ".picsymbol_stub", 0) \
696 SECTION_FUNCTION (machopic_picsymbol_stub1_section, \
697 in_machopic_picsymbol_stub1, \
698 ".section __TEXT,__picsymbolstub1,symbol_stubs,pure_instructions,32", 0)\
699 SECTION_FUNCTION (darwin_exception_section, \
700 in_darwin_exception, \
701 ".section __DATA,__gcc_except_tab", 0) \
702 SECTION_FUNCTION (darwin_eh_frame_section, \
703 in_darwin_eh_frame, \
704 ".section " EH_FRAME_SECTION_NAME ",__eh_frame" EH_FRAME_SECTION_ATTR, 0) \
707 objc_section_init (void) \
709 static int been_here = 0; \
711 if (been_here == 0) \
714 /* written, cold -> hot */ \
715 objc_cat_cls_meth_section (); \
716 objc_cat_inst_meth_section (); \
717 objc_string_object_section (); \
718 objc_constant_string_object_section (); \
719 objc_selector_refs_section (); \
720 objc_selector_fixup_section (); \
721 objc_cls_refs_section (); \
722 objc_class_section (); \
723 objc_meta_class_section (); \
724 /* shared, hot -> cold */ \
725 objc_cls_meth_section (); \
726 objc_inst_meth_section (); \
727 objc_protocol_section (); \
728 objc_class_names_section (); \
729 objc_meth_var_types_section (); \
730 objc_meth_var_names_section (); \
731 objc_category_section (); \
732 objc_class_vars_section (); \
733 objc_instance_vars_section (); \
734 objc_module_info_section (); \
735 objc_symbols_section (); \
739 #define READONLY_DATA_SECTION const_section
741 #undef TARGET_ASM_SELECT_SECTION
742 #define TARGET_ASM_SELECT_SECTION machopic_select_section
743 #undef TARGET_ASM_SELECT_RTX_SECTION
744 #define TARGET_ASM_SELECT_RTX_SECTION machopic_select_rtx_section
745 #undef TARGET_ASM_UNIQUE_SECTION
746 #define TARGET_ASM_UNIQUE_SECTION darwin_unique_section
750 #define ASM_DECLARE_UNRESOLVED_REFERENCE(FILE,NAME) \
753 if (MACHOPIC_INDIRECT) \
754 fprintf (FILE, "\t.lazy_reference "); \
756 fprintf (FILE, "\t.reference "); \
757 assemble_name (FILE, NAME); \
758 fprintf (FILE, "\n"); \
762 #define ASM_DECLARE_CLASS_REFERENCE(FILE,NAME) \
765 fprintf (FILE, "\t"); \
766 assemble_name (FILE, NAME); \
767 fprintf (FILE, "=0\n"); \
768 (*targetm.asm_out.globalize_label) (FILE, NAME); \
772 /* Globalizing directive for a label. */
773 #define GLOBAL_ASM_OP ".globl "
774 #define TARGET_ASM_GLOBALIZE_LABEL darwin_globalize_label
776 /* Emit an assembler directive to set visibility for a symbol. Used
777 to support visibility attribute and Darwin's private extern
779 #undef TARGET_ASM_ASSEMBLE_VISIBILITY
780 #define TARGET_ASM_ASSEMBLE_VISIBILITY darwin_assemble_visibility
783 #undef ASM_GENERATE_INTERNAL_LABEL
784 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM) \
785 sprintf (LABEL, "*%s%ld", PREFIX, (long)(NUM))
787 /* Since we have a separate readonly data section, define this so that
788 jump tables end up in text rather than data. */
790 #ifndef JUMP_TABLES_IN_TEXT_SECTION
791 #define JUMP_TABLES_IN_TEXT_SECTION 1
794 /* Symbolic names for various things we might know about a symbol. */
796 enum machopic_addr_class {
798 MACHOPIC_DEFINED_DATA,
799 MACHOPIC_UNDEFINED_DATA,
800 MACHOPIC_DEFINED_FUNCTION,
801 MACHOPIC_UNDEFINED_FUNCTION
804 /* Macros defining the various PIC cases. */
806 #define MACHO_DYNAMIC_NO_PIC_P (TARGET_DYNAMIC_NO_PIC)
807 #define MACHOPIC_INDIRECT (flag_pic || MACHO_DYNAMIC_NO_PIC_P)
808 #define MACHOPIC_JUST_INDIRECT (flag_pic == 1 || MACHO_DYNAMIC_NO_PIC_P)
809 #define MACHOPIC_PURE (flag_pic == 2 && ! MACHO_DYNAMIC_NO_PIC_P)
811 #undef TARGET_ENCODE_SECTION_INFO
812 #define TARGET_ENCODE_SECTION_INFO darwin_encode_section_info
813 #undef TARGET_STRIP_NAME_ENCODING
814 #define TARGET_STRIP_NAME_ENCODING darwin_strip_name_encoding
816 #define GEN_BINDER_NAME_FOR_STUB(BUF,STUB,STUB_LENGTH) \
818 const char *const stub_ = (STUB); \
819 char *buffer_ = (BUF); \
820 strcpy (buffer_, stub_); \
821 if (stub_[0] == '"') \
823 strcpy (buffer_ + (STUB_LENGTH) - 1, "_binder\""); \
827 strcpy (buffer_ + (STUB_LENGTH), "_binder"); \
831 #define GEN_SYMBOL_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH) \
833 const char *const symbol_ = (SYMBOL); \
834 char *buffer_ = (BUF); \
835 if (name_needs_quotes (symbol_) && symbol_[0] != '"') \
837 sprintf (buffer_, "\"%s\"", symbol_); \
841 strcpy (buffer_, symbol_); \
845 /* Given a symbol name string, create the lazy pointer version
846 of the symbol name. */
848 #define GEN_LAZY_PTR_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH) \
850 const char *symbol_ = darwin_strip_name_encoding (SYMBOL); \
851 char *buffer_ = (BUF); \
852 if (symbol_[0] == '"') \
854 strcpy (buffer_, "\"L"); \
855 strcpy (buffer_ + 2, symbol_ + 1); \
856 strcpy (buffer_ + (SYMBOL_LENGTH), "$lazy_ptr\""); \
858 else if (name_needs_quotes (symbol_)) \
860 strcpy (buffer_, "\"L"); \
861 strcpy (buffer_ + 2, symbol_); \
862 strcpy (buffer_ + (SYMBOL_LENGTH) + 2, "$lazy_ptr\""); \
866 strcpy (buffer_, "L"); \
867 strcpy (buffer_ + 1, symbol_); \
868 strcpy (buffer_ + (SYMBOL_LENGTH) + 1, "$lazy_ptr"); \
872 #define TARGET_ASM_EXCEPTION_SECTION darwin_exception_section
874 #define TARGET_ASM_EH_FRAME_SECTION darwin_eh_frame_section
876 #define EH_FRAME_SECTION_NAME "__TEXT"
877 #define EH_FRAME_SECTION_ATTR ",coalesced,no_toc+strip_static_syms"
879 #undef ASM_PREFERRED_EH_DATA_FORMAT
880 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL) \
881 (((CODE) == 2 && (GLOBAL) == 1) \
882 ? (DW_EH_PE_pcrel | DW_EH_PE_indirect) : \
883 ((CODE) == 1 || (GLOBAL) == 0) ? DW_EH_PE_pcrel : DW_EH_PE_absptr)
885 #define ASM_OUTPUT_DWARF_DELTA(FILE,SIZE,LABEL1,LABEL2) \
886 darwin_asm_output_dwarf_delta (FILE, SIZE, LABEL1, LABEL2)
888 #define ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX(ASM_OUT_FILE, ENCODING, SIZE, ADDR, DONE) \
889 if (ENCODING == ASM_PREFERRED_EH_DATA_FORMAT (2, 1)) { \
890 darwin_non_lazy_pcrel (ASM_OUT_FILE, ADDR); \
895 #define TARGET_TERMINATE_DW2_EH_FRAME_INFO false
897 #undef TARGET_ASM_NAMED_SECTION
898 #define TARGET_ASM_NAMED_SECTION darwin_asm_named_section
899 #undef TARGET_SECTION_TYPE_FLAGS
900 #define TARGET_SECTION_TYPE_FLAGS darwin_section_type_flags
902 #define DARWIN_REGISTER_TARGET_PRAGMAS() \
904 c_register_pragma (0, "mark", darwin_pragma_ignore); \
905 c_register_pragma (0, "options", darwin_pragma_options); \
906 c_register_pragma (0, "segment", darwin_pragma_ignore); \
907 c_register_pragma (0, "unused", darwin_pragma_unused); \
911 #define ASM_APP_ON ""
913 #define ASM_APP_OFF ""
915 void darwin_register_frameworks (int);
916 #define TARGET_EXTRA_INCLUDES darwin_register_frameworks
918 void add_framework_path (char *);
919 #define TARGET_OPTF add_framework_path
921 #define TARGET_HAS_F_SETLKW
923 /* Darwin before 7.0 does not have C99 functions. */
924 #ifndef TARGET_C99_FUNCTIONS
925 #define TARGET_C99_FUNCTIONS 0
928 #endif /* CONFIG_DARWIN_H */