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 { "-dead_strip", "-Zdead_strip" }, \
113 { "-no_dead_strip_inits_and_terms", "-Zno_dead_strip_inits_and_terms" }, \
114 { "-dependency-file", "-MF" }, \
115 { "-dylib_file", "-Zdylib_file" }, \
116 { "-dynamic", "-Zdynamic" }, \
117 { "-dynamiclib", "-Zdynamiclib" }, \
118 { "-exported_symbols_list", "-Zexported_symbols_list" }, \
119 { "-segaddr", "-Zsegaddr" }, \
120 { "-segs_read_only_addr", "-Zsegs_read_only_addr" }, \
121 { "-segs_read_write_addr", "-Zsegs_read_write_addr" }, \
122 { "-seg_addr_table", "-Zseg_addr_table" }, \
123 { "-seg_addr_table_filename", "-Zseg_addr_table_filename" }, \
124 { "-filelist", "-Xlinker -filelist -Xlinker" }, \
125 { "-framework", "-Xlinker -framework -Xlinker" }, \
126 { "-flat_namespace", "-Zflat_namespace" }, \
127 { "-force_cpusubtype_ALL", "-Zforce_cpusubtype_ALL" }, \
128 { "-force_flat_namespace", "-Zforce_flat_namespace" }, \
129 { "-image_base", "-Zimage_base" }, \
130 { "-init", "-Zinit" }, \
131 { "-install_name", "-Zinstall_name" }, \
132 { "-multiply_defined_unused", "-Zmultiplydefinedunused" }, \
133 { "-multiply_defined", "-Zmultiply_defined" }, \
134 { "-multi_module", "-Zmulti_module" }, \
135 { "-static", "-static -Wa,-static" }, \
136 { "-single_module", "-Zsingle_module" }, \
137 { "-unexported_symbols_list", "-Zunexported_symbols_list" }, \
138 SUBTARGET_OPTION_TRANSLATE_TABLE
140 /* Nonzero if the user has chosen to force sizeof(bool) to be 1
141 by providing the -mone-byte-bool switch. It would be better
142 to use SUBTARGET_SWITCHES for this instead of SUBTARGET_OPTIONS,
143 but there are no more bits in rs6000 TARGET_SWITCHES. Note
144 that this switch has no "no-" variant. */
145 extern const char *darwin_one_byte_bool;
147 extern int darwin_fix_and_continue;
148 extern const char *darwin_fix_and_continue_switch;
150 #undef SUBTARGET_OPTIONS
151 #define SUBTARGET_OPTIONS \
152 {"one-byte-bool", &darwin_one_byte_bool, N_("Set sizeof(bool) to 1"), 0 }, \
153 {"fix-and-continue", &darwin_fix_and_continue_switch, \
154 N_("Generate code suitable for fast turn around debugging"), 0}, \
155 {"no-fix-and-continue", &darwin_fix_and_continue_switch, \
156 N_("Don't generate code suitable for fast turn around debugging"), 0}
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, "Zseg_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 /* Machine dependent cpp options. __APPLE_CC__ is defined as the
204 Apple include files expect it to be defined and won't work if it
208 #define CPP_SPEC "%{static:%{!dynamic:-D__STATIC__}}%{!static:-D__DYNAMIC__}\
211 /* This is mostly a clone of the standard LINK_COMMAND_SPEC, plus
212 precomp, libtool, and fat build additions. Also we
213 don't specify a second %G after %L because libSystem is
214 self-contained and doesn't need to link against libgcc.a. */
215 /* In general, random Darwin linker flags should go into LINK_SPEC
216 instead of LINK_COMMAND_SPEC. The command spec is better for
217 specifying the handling of options understood by generic Unix
218 linkers, and for positional arguments like libraries. */
219 #define LINK_COMMAND_SPEC "\
220 %{!fdump=*:%{!fsyntax-only:%{!precomp:%{!c:%{!M:%{!MM:%{!E:%{!S:\
221 %{!Zdynamiclib:%(linker)}%{Zdynamiclib:/usr/bin/libtool} \
222 %{!Zdynamiclib:-arch %(darwin_arch)} \
223 %{Zdynamiclib:-arch_only %(darwin_arch)} \
224 %l %X %{d} %{s} %{t} %{Z} \
225 %{!Zdynamiclib:%{A} %{e*} %{m} %{N} %{n} %{r} %{u*} %{x} %{z}} \
226 %{@:-o %f%u.out}%{!@:%{o*}%{!o:-o a.out}} \
227 %{!Zdynamiclib:%{!A:%{!nostdlib:%{!nostartfiles:%S}}}} \
228 %{L*} %(link_libgcc) %o %{fprofile-arcs|fprofile-generate:-lgcov} \
229 %{!nostdlib:%{!nodefaultlibs:%G %L}} \
230 %{!A:%{!nostdlib:%{!nostartfiles:%E}}} %{T*} %{F*} }}}}}}}}"
232 /* Please keep the random linker options in alphabetical order (modulo
233 'Z' and 'no' prefixes). Options that can only go to one of libtool
234 or ld must be listed twice, under both !Zdynamiclib and
235 Zdynamiclib, with one of the cases reporting an error. */
236 /* Note that options taking arguments may appear multiple times on a
237 command line with different arguments each time, so put a * after
238 their names so all of them get passed. */
240 "%{static}%{!static:-dynamic} \
241 %{fgnu-runtime:%:replace-outfile(-lobjc -lobjc-gnu)}\
244 %{Zbundle_loader*:-bundle_loader %*} \
246 %{compatibility_version*:%e-compatibility_version only allowed with -dynamiclib\
248 %{current_version*:%e-current_version only allowed with -dynamiclib} \
249 %{Zforce_cpusubtype_ALL:-force_cpusubtype_ALL} \
250 %{Zforce_flat_namespace:-force_flat_namespace} \
251 %{Zinstall_name*:%e-install_name only allowed with -dynamiclib} \
252 %{keep_private_externs} \
256 %{Zbundle:%e-bundle not allowed with -dynamiclib} \
257 %{Zbundle_loader*:%e-bundle_loader not allowed with -dynamiclib} \
258 %{client_name*:%e-client_name not allowed with -dynamiclib} \
259 %{compatibility_version*} \
260 %{current_version*} \
261 %{Zforce_cpusubtype_ALL:%e-force_cpusubtype_ALL not allowed with -dynamiclib} \
262 %{Zforce_flat_namespace:%e-force_flat_namespace not allowed with -dynamiclib} \
263 %{Zinstall_name*:-install_name %*} \
264 %{keep_private_externs:%e-keep_private_externs not allowed with -dynamiclib} \
265 %{private_bundle:%e-private_bundle not allowed with -dynamiclib} \
267 %{Zall_load:-all_load}%{Zdynamiclib:%{!Zall_load:-noall_load}} \
268 %{Zallowable_client*:-allowable_client %*} \
269 %{Zbind_at_load:-bind_at_load} \
270 %{Zarch_errors_fatal:-arch_errors_fatal} \
271 %{Zdead_strip:-dead_strip} \
272 %{Zno_dead_strip_inits_and_terms:-no_dead_strip_inits_and_terms} \
273 %{Zdylib_file*:-dylib_file %*} \
274 %{Zdynamic:-dynamic}\
275 %{Zexported_symbols_list*:-exported_symbols_list %*} \
276 %{Zflat_namespace:-flat_namespace} \
277 %{headerpad_max_install_names*} \
278 %{Zimage_base*:-image_base %*} \
281 %{Zmulti_module:-multi_module} %{Zsingle_module:-single_module} \
282 %{Zmultiply_defined*:-multiply_defined %*} \
283 %{Zmultiplydefinedunused*:-multiply_defined_unused %*} \
284 %{prebind} %{noprebind} %{nofixprebinding} %{prebind_all_twolevel_modules} \
285 %{read_only_relocs} \
286 %{sectcreate*} %{sectorder*} %{seg1addr*} %{segprot*} \
287 %{Zsegaddr*:-segaddr %*} \
288 %{Zsegs_read_only_addr*:-segs_read_only_addr %*} \
289 %{Zsegs_read_write_addr*:-segs_read_write_addr %*} \
290 %{Zseg_addr_table*: -seg_addr_table %*} \
291 %{Zseg_addr_table_filename*:-seg_addr_table_filename %*} \
292 %{sub_library*} %{sub_umbrella*} \
293 %{twolevel_namespace} %{twolevel_namespace_hints} \
296 %{Zunexported_symbols_list*:-unexported_symbols_list %*} \
297 %{Zweak_reference_mismatches*:-weak_reference_mismatches %*} \
298 %{!Zweak_reference_mismatches*:-weak_reference_mismatches non-weak} \
302 %{pagezero_size*} %{segs_read_*} %{seglinkedit} %{noseglinkedit} \
303 %{sectalign*} %{sectobjectsymbols*} %{segcreate*} %{whyload} \
304 %{whatsloaded} %{dylinker_install_name*} \
305 %{dylinker} %{Mach} "
308 /* Machine dependent libraries but do not redefine it if we already on 7.0 and
309 above as it needs to link with libmx also. */
312 #define LIB_SPEC "%{!static:-lSystem}"
315 /* We specify crt0.o as -lcrt0.o so that ld will search the library path. */
317 #undef STARTFILE_SPEC
318 #define STARTFILE_SPEC \
319 "%{!Zdynamiclib:%{Zbundle:%{!static:-lbundle1.o}} \
320 %{!Zbundle:%{pg:%{static:-lgcrt0.o} \
321 %{!static:%{object:-lgcrt0.o} \
322 %{!object:%{preload:-lgcrt0.o} \
323 %{!preload:-lgcrt1.o crt2.o%s}}}} \
324 %{!pg:%{static:-lcrt0.o} \
325 %{!static:%{object:-lcrt0.o} \
326 %{!object:%{preload:-lcrt0.o} \
327 %{!preload:-lcrt1.o crt2.o%s}}}}}}"
329 /* The native Darwin linker doesn't necessarily place files in the order
330 that they're specified on the link line. Thus, it is pointless
331 to put anything in ENDFILE_SPEC. */
332 /* #define ENDFILE_SPEC "" */
334 /* Default Darwin ASM_SPEC, very simple. */
335 #define ASM_SPEC "-arch %(darwin_arch)"
337 /* We use Dbx symbol format. */
339 #define DBX_DEBUGGING_INFO 1
341 /* Also enable Dwarf 2 as an option. */
342 #define DWARF2_DEBUGGING_INFO
343 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
345 #define DEBUG_FRAME_SECTION "__DWARFA,__debug_frame,coalesced,no_toc+strip_static_syms"
346 #define DEBUG_INFO_SECTION "__DWARFA,__debug_info"
347 #define DEBUG_ABBREV_SECTION "__DWARFA,__debug_abbrev"
348 #define DEBUG_ARANGES_SECTION "__DWARFA,__debug_aranges"
349 #define DEBUG_MACINFO_SECTION "__DWARFA,__debug_macinfo"
350 #define DEBUG_LINE_SECTION "__DWARFA,__debug_line"
351 #define DEBUG_LOC_SECTION "__DWARFA,__debug_loc"
352 #define DEBUG_PUBNAMES_SECTION "__DWARFA,__debug_pubnames"
353 #define DEBUG_STR_SECTION "__DWARFA,__debug_str"
354 #define DEBUG_RANGES_SECTION "__DWARFA,__debug_ranges"
356 /* When generating stabs debugging, use N_BINCL entries. */
358 #define DBX_USE_BINCL
360 /* There is no limit to the length of stabs strings. */
362 #define DBX_CONTIN_LENGTH 0
364 /* gdb needs a null N_SO at the end of each file for scattered loading. */
366 #define DBX_OUTPUT_NULL_N_SO_AT_MAIN_SOURCE_FILE_END
368 /* GCC's definition of 'one_only' is the same as its definition of 'weak'. */
369 #define MAKE_DECL_ONE_ONLY(DECL) (DECL_WEAK (DECL) = 1)
371 /* Mach-O supports 'weak imports', and 'weak definitions' in coalesced
372 sections. machopic_select_section ensures that weak variables go in
373 coalesced sections. Weak aliases (or any other kind of aliases) are
374 not supported. Weak symbols that aren't visible outside the .s file
375 are not supported. */
376 #define ASM_WEAKEN_DECL(FILE, DECL, NAME, ALIAS) \
380 warning ("alias definitions not supported in Mach-O; ignored"); \
384 if (! DECL_EXTERNAL (DECL) && TREE_PUBLIC (DECL)) \
385 targetm.asm_out.globalize_label (FILE, NAME); \
386 if (DECL_EXTERNAL (DECL)) \
387 fputs ("\t.weak_reference ", FILE); \
388 else if (TREE_PUBLIC (DECL)) \
389 fputs ("\t.weak_definition ", FILE); \
392 assemble_name (FILE, NAME); \
393 fputc ('\n', FILE); \
396 /* We support hidden visibility */
397 #undef TARGET_SUPPORTS_HIDDEN
398 #define TARGET_SUPPORTS_HIDDEN 1
400 /* The Darwin linker imposes two limitations on common symbols: they
401 can't have hidden visibility, and they can't appear in dylibs. As
402 a consequence, we should never use common symbols to represent
404 #undef USE_COMMON_FOR_ONE_ONLY
405 #define USE_COMMON_FOR_ONE_ONLY 0
407 /* The Darwin linker doesn't want coalesced symbols to appear in
408 a static archive's table of contents. */
409 #undef TARGET_WEAK_NOT_IN_ARCHIVE_TOC
410 #define TARGET_WEAK_NOT_IN_ARCHIVE_TOC 1
412 /* We make exception information linkonce. */
413 #undef TARGET_USES_WEAK_UNWIND_INFO
414 #define TARGET_USES_WEAK_UNWIND_INFO 1
416 /* We need to use a nonlocal label for the start of an EH frame: the
417 Darwin linker requires that a coalesced section start with a label. */
418 #undef FRAME_BEGIN_LABEL
419 #define FRAME_BEGIN_LABEL "EH_frame"
421 /* Emit a label for the FDE corresponding to DECL. EMPTY means
422 emit a label for an empty FDE. */
423 #define TARGET_ASM_EMIT_UNWIND_LABEL darwin_emit_unwind_label
425 /* Our profiling scheme doesn't LP labels and counter words. */
427 #define NO_PROFILE_COUNTERS 1
429 #undef INIT_SECTION_ASM_OP
430 #define INIT_SECTION_ASM_OP
434 #define TARGET_ASM_CONSTRUCTOR machopic_asm_out_constructor
435 #define TARGET_ASM_DESTRUCTOR machopic_asm_out_destructor
437 /* Always prefix with an underscore. */
439 #define USER_LABEL_PREFIX "_"
441 /* Don't output a .file directive. That is only used by the assembler for
443 #undef TARGET_ASM_FILE_START_FILE_DIRECTIVE
444 #define TARGET_ASM_FILE_START_FILE_DIRECTIVE false
446 #undef TARGET_ASM_FILE_END
447 #define TARGET_ASM_FILE_END darwin_file_end
449 #define ASM_OUTPUT_SKIP(FILE,SIZE) \
450 fprintf (FILE, "\t.space "HOST_WIDE_INT_PRINT_UNSIGNED"\n", SIZE)
452 /* Give ObjC methods pretty symbol names. */
454 #undef OBJC_GEN_METHOD_LABEL
455 #define OBJC_GEN_METHOD_LABEL(BUF,IS_INST,CLASS_NAME,CAT_NAME,SEL_NAME,NUM) \
457 sprintf (BUF, "%c[%s(%s) %s]", (IS_INST) ? '-' : '+', \
458 (CLASS_NAME), (CAT_NAME), (SEL_NAME)); \
460 sprintf (BUF, "%c[%s %s]", (IS_INST) ? '-' : '+', \
461 (CLASS_NAME), (SEL_NAME)); \
464 /* The RTTI data (e.g., __ti4name) is common and public (and static),
465 but it does need to be referenced via indirect PIC data pointers.
466 The machopic_define_symbol calls are telling the machopic subsystem
467 that the name *is* defined in this module, so it doesn't need to
468 make them indirect. */
470 #undef ASM_DECLARE_OBJECT_NAME
471 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL) \
473 const char *xname = NAME; \
474 if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF) \
475 xname = IDENTIFIER_POINTER (DECL_NAME (DECL)); \
476 if (! DECL_WEAK (DECL) \
477 && ((TREE_STATIC (DECL) \
478 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
479 || DECL_INITIAL (DECL))) \
480 machopic_define_symbol (DECL_RTL (DECL)); \
481 if ((TREE_STATIC (DECL) \
482 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
483 || DECL_INITIAL (DECL)) \
484 (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false); \
485 ASM_OUTPUT_LABEL (FILE, xname); \
486 /* Darwin doesn't support zero-size objects, so give them a \
488 if (tree_low_cst (DECL_SIZE_UNIT (DECL), 1) == 0) \
489 assemble_zeros (1); \
492 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
494 const char *xname = NAME; \
495 if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF) \
496 xname = IDENTIFIER_POINTER (DECL_NAME (DECL)); \
497 if (! DECL_WEAK (DECL) \
498 && ((TREE_STATIC (DECL) \
499 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
500 || DECL_INITIAL (DECL))) \
501 machopic_define_symbol (DECL_RTL (DECL)); \
502 if ((TREE_STATIC (DECL) \
503 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
504 || DECL_INITIAL (DECL)) \
505 (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false); \
506 ASM_OUTPUT_LABEL (FILE, xname); \
509 #define ASM_DECLARE_CONSTANT_NAME(FILE, NAME, EXP, SIZE) \
511 ASM_OUTPUT_LABEL (FILE, NAME); \
512 /* Darwin doesn't support zero-size objects, so give them a \
515 assemble_zeros (1); \
518 /* Wrap new method names in quotes so the assembler doesn't gag.
519 Make Objective-C internal symbols local. */
521 #undef ASM_OUTPUT_LABELREF
522 #define ASM_OUTPUT_LABELREF(FILE,NAME) \
524 const char *xname = (NAME); \
525 if (! strcmp (xname, "<pic base>")) \
526 machopic_output_function_base_name(FILE); \
527 else if (xname[0] == '&' || xname[0] == '*') \
529 int len = strlen (xname); \
530 if (len > 6 && !strcmp ("$stub", xname + len - 5)) \
531 machopic_validate_stub_or_non_lazy_ptr (xname); \
532 else if (len > 7 && !strcmp ("$stub\"", xname + len - 6)) \
533 machopic_validate_stub_or_non_lazy_ptr (xname); \
534 else if (len > 14 && !strcmp ("$non_lazy_ptr", xname + len - 13)) \
535 machopic_validate_stub_or_non_lazy_ptr (xname); \
536 fputs (&xname[1], FILE); \
538 else if (xname[0] == '+' || xname[0] == '-') \
539 fprintf (FILE, "\"%s\"", xname); \
540 else if (!strncmp (xname, "_OBJC_", 6)) \
541 fprintf (FILE, "L%s", xname); \
542 else if (!strncmp (xname, ".objc_class_name_", 17)) \
543 fprintf (FILE, "%s", xname); \
545 asm_fprintf (FILE, "%U%s", xname); \
548 /* Output before executable code. */
549 #undef TEXT_SECTION_ASM_OP
550 #define TEXT_SECTION_ASM_OP "\t.text"
552 /* Output before writable data. */
554 #undef DATA_SECTION_ASM_OP
555 #define DATA_SECTION_ASM_OP "\t.data"
558 #define ALIGN_ASM_OP ".align"
560 #undef ASM_OUTPUT_ALIGN
561 #define ASM_OUTPUT_ALIGN(FILE,LOG) \
563 fprintf (FILE, "\t%s %d\n", ALIGN_ASM_OP, (LOG))
565 /* Ensure correct alignment of bss data. */
567 #undef ASM_OUTPUT_ALIGNED_DECL_LOCAL
568 #define ASM_OUTPUT_ALIGNED_DECL_LOCAL(FILE, DECL, NAME, SIZE, ALIGN) \
570 fputs (".lcomm ", (FILE)); \
571 assemble_name ((FILE), (NAME)); \
572 fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED",%u\n", (SIZE), \
573 floor_log2 ((ALIGN) / BITS_PER_UNIT)); \
574 if ((DECL) && ((TREE_STATIC (DECL) \
575 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
576 || DECL_INITIAL (DECL))) \
578 (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false); \
579 machopic_define_symbol (DECL_RTL (DECL)); \
583 /* The maximum alignment which the object file format can support.
584 For Mach-O, this is 2^15. */
586 #undef MAX_OFILE_ALIGNMENT
587 #define MAX_OFILE_ALIGNMENT 0x8000
589 /* Create new Mach-O sections. */
591 #undef SECTION_FUNCTION
592 #define SECTION_FUNCTION(FUNCTION, SECTION, DIRECTIVE, OBJC) \
593 extern void FUNCTION (void); \
597 if (in_section != SECTION) \
600 objc_section_init (); \
602 fputs ("\t" DIRECTIVE "\n", asm_out_file); \
603 in_section = SECTION; \
607 /* Darwin uses many types of special sections. */
609 #undef EXTRA_SECTIONS
610 #define EXTRA_SECTIONS \
611 in_text_coal, in_text_unlikely, in_text_unlikely_coal, \
612 in_const, in_const_data, in_cstring, in_literal4, in_literal8, \
613 in_const_coal, in_const_data_coal, in_data_coal, \
614 in_constructor, in_destructor, in_mod_init, in_mod_term, \
615 in_objc_class, in_objc_meta_class, in_objc_category, \
616 in_objc_class_vars, in_objc_instance_vars, \
617 in_objc_cls_meth, in_objc_inst_meth, \
618 in_objc_cat_cls_meth, in_objc_cat_inst_meth, \
619 in_objc_selector_refs, \
620 in_objc_selector_fixup, \
621 in_objc_symbols, in_objc_module_info, \
622 in_objc_protocol, in_objc_string_object, \
623 in_objc_constant_string_object, \
624 in_objc_image_info, \
625 in_objc_class_names, in_objc_meth_var_names, \
626 in_objc_meth_var_types, in_objc_cls_refs, \
627 in_machopic_nl_symbol_ptr, \
628 in_machopic_lazy_symbol_ptr, \
629 in_machopic_symbol_stub, \
630 in_machopic_symbol_stub1, \
631 in_machopic_picsymbol_stub, \
632 in_machopic_picsymbol_stub1, \
633 in_darwin_exception, in_darwin_eh_frame, \
636 #undef EXTRA_SECTION_FUNCTIONS
637 #define EXTRA_SECTION_FUNCTIONS \
638 static void objc_section_init (void); \
639 SECTION_FUNCTION (text_coal_section, \
641 ".section __TEXT,__textcoal_nt,coalesced," \
642 "pure_instructions", 0) \
643 SECTION_FUNCTION (text_unlikely_section, \
645 ".section __TEXT,__text_unlikely,coalesced," \
646 "pure_instructions", 0) \
647 SECTION_FUNCTION (text_unlikely_coal_section, \
648 in_text_unlikely_coal, \
649 ".section __TEXT,__text_unlikely_coal," \
650 "coalesced,pure_instructions", 0) \
651 SECTION_FUNCTION (const_section, \
654 SECTION_FUNCTION (const_coal_section, \
656 ".section __TEXT,__const_coal,coalesced", 0) \
657 SECTION_FUNCTION (const_data_section, \
660 SECTION_FUNCTION (const_data_coal_section, \
661 in_const_data_coal, \
662 ".section __DATA,__const_coal,coalesced", 0) \
663 SECTION_FUNCTION (data_coal_section, \
665 ".section __DATA,__datacoal_nt,coalesced", 0) \
666 SECTION_FUNCTION (cstring_section, \
669 SECTION_FUNCTION (literal4_section, \
672 SECTION_FUNCTION (literal8_section, \
675 SECTION_FUNCTION (constructor_section, \
678 SECTION_FUNCTION (mod_init_section, \
680 ".mod_init_func", 0) \
681 SECTION_FUNCTION (mod_term_section, \
683 ".mod_term_func", 0) \
684 SECTION_FUNCTION (destructor_section, \
687 SECTION_FUNCTION (objc_class_section, \
690 SECTION_FUNCTION (objc_meta_class_section, \
691 in_objc_meta_class, \
692 ".objc_meta_class", 1) \
693 SECTION_FUNCTION (objc_category_section, \
695 ".objc_category", 1) \
696 SECTION_FUNCTION (objc_class_vars_section, \
697 in_objc_class_vars, \
698 ".objc_class_vars", 1) \
699 SECTION_FUNCTION (objc_instance_vars_section, \
700 in_objc_instance_vars, \
701 ".objc_instance_vars", 1) \
702 SECTION_FUNCTION (objc_cls_meth_section, \
704 ".objc_cls_meth", 1) \
705 SECTION_FUNCTION (objc_inst_meth_section, \
707 ".objc_inst_meth", 1) \
708 SECTION_FUNCTION (objc_cat_cls_meth_section, \
709 in_objc_cat_cls_meth, \
710 ".objc_cat_cls_meth", 1) \
711 SECTION_FUNCTION (objc_cat_inst_meth_section, \
712 in_objc_cat_inst_meth, \
713 ".objc_cat_inst_meth", 1) \
714 SECTION_FUNCTION (objc_selector_refs_section, \
715 in_objc_selector_refs, \
716 ".objc_message_refs", 1) \
717 SECTION_FUNCTION (objc_selector_fixup_section, \
718 in_objc_selector_fixup, \
719 ".section __OBJC, __sel_fixup, regular, no_dead_strip", 1) \
720 SECTION_FUNCTION (objc_symbols_section, \
722 ".objc_symbols", 1) \
723 SECTION_FUNCTION (objc_module_info_section, \
724 in_objc_module_info, \
725 ".objc_module_info", 1) \
726 SECTION_FUNCTION (objc_protocol_section, \
728 ".objc_protocol", 1) \
729 SECTION_FUNCTION (objc_string_object_section, \
730 in_objc_string_object, \
731 ".objc_string_object", 1) \
732 SECTION_FUNCTION (objc_constant_string_object_section, \
733 in_objc_constant_string_object, \
734 ".section __OBJC, __cstring_object, regular, " \
735 "no_dead_strip", 1) \
736 /* Fix-and-Continue image marker. */ \
737 SECTION_FUNCTION (objc_image_info_section, \
738 in_objc_image_info, \
739 ".section __OBJC, __image_info, regular, " \
740 "no_dead_strip", 1) \
741 SECTION_FUNCTION (objc_class_names_section, \
742 in_objc_class_names, \
743 ".objc_class_names", 1) \
744 SECTION_FUNCTION (objc_meth_var_names_section, \
745 in_objc_meth_var_names, \
746 ".objc_meth_var_names", 1) \
747 SECTION_FUNCTION (objc_meth_var_types_section, \
748 in_objc_meth_var_types, \
749 ".objc_meth_var_types", 1) \
750 SECTION_FUNCTION (objc_cls_refs_section, \
752 ".objc_cls_refs", 1) \
754 SECTION_FUNCTION (machopic_lazy_symbol_ptr_section, \
755 in_machopic_lazy_symbol_ptr, \
756 ".lazy_symbol_pointer", 0) \
757 SECTION_FUNCTION (machopic_nl_symbol_ptr_section, \
758 in_machopic_nl_symbol_ptr, \
759 ".non_lazy_symbol_pointer", 0) \
760 SECTION_FUNCTION (machopic_symbol_stub_section, \
761 in_machopic_symbol_stub, \
763 SECTION_FUNCTION (machopic_symbol_stub1_section, \
764 in_machopic_symbol_stub1, \
765 ".section __TEXT,__symbol_stub1,symbol_stubs," \
766 "pure_instructions,16", 0) \
767 SECTION_FUNCTION (machopic_picsymbol_stub_section, \
768 in_machopic_picsymbol_stub, \
769 ".picsymbol_stub", 0) \
770 SECTION_FUNCTION (machopic_picsymbol_stub1_section, \
771 in_machopic_picsymbol_stub1, \
772 ".section __TEXT,__picsymbolstub1,symbol_stubs," \
773 "pure_instructions,32", 0) \
774 SECTION_FUNCTION (darwin_exception_section, \
775 in_darwin_exception, \
776 ".section __DATA,__gcc_except_tab", 0) \
777 SECTION_FUNCTION (darwin_eh_frame_section, \
778 in_darwin_eh_frame, \
779 ".section " EH_FRAME_SECTION_NAME ",__eh_frame" \
780 EH_FRAME_SECTION_ATTR, 0) \
783 objc_section_init (void) \
785 static int been_here = 0; \
787 if (been_here == 0) \
790 /* written, cold -> hot */ \
791 objc_cat_cls_meth_section (); \
792 objc_cat_inst_meth_section (); \
793 objc_string_object_section (); \
794 objc_constant_string_object_section (); \
795 objc_selector_refs_section (); \
796 objc_selector_fixup_section (); \
797 objc_cls_refs_section (); \
798 objc_class_section (); \
799 objc_meta_class_section (); \
800 /* shared, hot -> cold */ \
801 objc_cls_meth_section (); \
802 objc_inst_meth_section (); \
803 objc_protocol_section (); \
804 objc_class_names_section (); \
805 objc_meth_var_types_section (); \
806 objc_meth_var_names_section (); \
807 objc_category_section (); \
808 objc_class_vars_section (); \
809 objc_instance_vars_section (); \
810 objc_module_info_section (); \
811 objc_symbols_section (); \
815 #define READONLY_DATA_SECTION const_section
817 #undef TARGET_ASM_SELECT_SECTION
818 #define TARGET_ASM_SELECT_SECTION machopic_select_section
819 #define USE_SELECT_SECTION_FOR_FUNCTIONS
821 #undef TARGET_ASM_SELECT_RTX_SECTION
822 #define TARGET_ASM_SELECT_RTX_SECTION machopic_select_rtx_section
823 #undef TARGET_ASM_UNIQUE_SECTION
824 #define TARGET_ASM_UNIQUE_SECTION darwin_unique_section
825 #undef TARGET_ASM_FUNCTION_RODATA_SECTION
826 #define TARGET_ASM_FUNCTION_RODATA_SECTION default_no_function_rodata_section
829 #define ASM_DECLARE_UNRESOLVED_REFERENCE(FILE,NAME) \
832 if (MACHOPIC_INDIRECT) \
833 fprintf (FILE, "\t.lazy_reference "); \
835 fprintf (FILE, "\t.reference "); \
836 assemble_name (FILE, NAME); \
837 fprintf (FILE, "\n"); \
841 #define ASM_DECLARE_CLASS_REFERENCE(FILE,NAME) \
844 fprintf (FILE, "\t"); \
845 assemble_name (FILE, NAME); \
846 fprintf (FILE, "=0\n"); \
847 (*targetm.asm_out.globalize_label) (FILE, NAME); \
851 /* Globalizing directive for a label. */
852 #define GLOBAL_ASM_OP ".globl "
853 #define TARGET_ASM_GLOBALIZE_LABEL darwin_globalize_label
855 /* Emit an assembler directive to set visibility for a symbol. Used
856 to support visibility attribute and Darwin's private extern
858 #undef TARGET_ASM_ASSEMBLE_VISIBILITY
859 #define TARGET_ASM_ASSEMBLE_VISIBILITY darwin_assemble_visibility
862 #undef ASM_GENERATE_INTERNAL_LABEL
863 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM) \
864 sprintf (LABEL, "*%s%ld", PREFIX, (long)(NUM))
866 #undef TARGET_ASM_MARK_DECL_PRESERVED
867 #define TARGET_ASM_MARK_DECL_PRESERVED darwin_mark_decl_preserved
869 /* Set on a symbol with SYMBOL_FLAG_FUNCTION or
870 MACHO_SYMBOL_FLAG_VARIABLE to indicate that the function or
871 variable has been defined in this translation unit. */
873 #define MACHO_SYMBOL_FLAG_VARIABLE (SYMBOL_FLAG_MACH_DEP)
874 #define MACHO_SYMBOL_FLAG_DEFINED ((SYMBOL_FLAG_MACH_DEP) << 1)
876 /* Set on a symbol to indicate when fix-and-continue style code
877 generation is being used and the symbol refers to a static symbol
878 that should be rebound from new instances of a translation unit to
879 the original instance of the data. */
881 #define MACHO_SYMBOL_STATIC ((SYMBOL_FLAG_MACH_DEP) << 2)
883 /* Symbolic names for various things we might know about a symbol. */
885 enum machopic_addr_class {
887 MACHOPIC_DEFINED_DATA,
888 MACHOPIC_UNDEFINED_DATA,
889 MACHOPIC_DEFINED_FUNCTION,
890 MACHOPIC_UNDEFINED_FUNCTION
893 /* Macros defining the various PIC cases. */
895 #define MACHO_DYNAMIC_NO_PIC_P (TARGET_DYNAMIC_NO_PIC)
896 #define MACHOPIC_INDIRECT (flag_pic || MACHO_DYNAMIC_NO_PIC_P)
897 #define MACHOPIC_JUST_INDIRECT (flag_pic == 1 || MACHO_DYNAMIC_NO_PIC_P)
898 #define MACHOPIC_PURE (flag_pic == 2 && ! MACHO_DYNAMIC_NO_PIC_P)
900 #undef TARGET_ENCODE_SECTION_INFO
901 #define TARGET_ENCODE_SECTION_INFO darwin_encode_section_info
902 #undef TARGET_STRIP_NAME_ENCODING
903 #define TARGET_STRIP_NAME_ENCODING default_strip_name_encoding
905 #define GEN_BINDER_NAME_FOR_STUB(BUF,STUB,STUB_LENGTH) \
907 const char *const stub_ = (STUB); \
908 char *buffer_ = (BUF); \
909 strcpy (buffer_, stub_); \
910 if (stub_[0] == '"') \
912 strcpy (buffer_ + (STUB_LENGTH) - 1, "_binder\""); \
916 strcpy (buffer_ + (STUB_LENGTH), "_binder"); \
920 #define GEN_SYMBOL_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH) \
922 const char *const symbol_ = (SYMBOL); \
923 char *buffer_ = (BUF); \
924 if (name_needs_quotes (symbol_) && symbol_[0] != '"') \
926 sprintf (buffer_, "\"%s\"", symbol_); \
930 strcpy (buffer_, symbol_); \
934 /* Given a symbol name string, create the lazy pointer version
935 of the symbol name. */
937 #define GEN_LAZY_PTR_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH) \
939 const char *symbol_ = (SYMBOL); \
940 char *buffer_ = (BUF); \
941 if (symbol_[0] == '"') \
943 strcpy (buffer_, "\"L"); \
944 strcpy (buffer_ + 2, symbol_ + 1); \
945 strcpy (buffer_ + (SYMBOL_LENGTH), "$lazy_ptr\""); \
947 else if (name_needs_quotes (symbol_)) \
949 strcpy (buffer_, "\"L"); \
950 strcpy (buffer_ + 2, symbol_); \
951 strcpy (buffer_ + (SYMBOL_LENGTH) + 2, "$lazy_ptr\""); \
955 strcpy (buffer_, "L"); \
956 strcpy (buffer_ + 1, symbol_); \
957 strcpy (buffer_ + (SYMBOL_LENGTH) + 1, "$lazy_ptr"); \
961 #define TARGET_ASM_EXCEPTION_SECTION darwin_exception_section
963 #define TARGET_ASM_EH_FRAME_SECTION darwin_eh_frame_section
965 #define EH_FRAME_SECTION_NAME "__TEXT"
966 #define EH_FRAME_SECTION_ATTR ",coalesced,no_toc+strip_static_syms+live_support"
968 /* Java runtime class list. */
969 #define JCR_SECTION_NAME "__DATA,jcr,regular,no_dead_strip"
971 #undef ASM_PREFERRED_EH_DATA_FORMAT
972 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL) \
973 (((CODE) == 2 && (GLOBAL) == 1) \
974 ? (DW_EH_PE_pcrel | DW_EH_PE_indirect) : \
975 ((CODE) == 1 || (GLOBAL) == 0) ? DW_EH_PE_pcrel : DW_EH_PE_absptr)
977 #define ASM_OUTPUT_DWARF_DELTA(FILE,SIZE,LABEL1,LABEL2) \
978 darwin_asm_output_dwarf_delta (FILE, SIZE, LABEL1, LABEL2)
980 #define ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX(ASM_OUT_FILE, ENCODING, SIZE, ADDR, DONE) \
981 if (ENCODING == ASM_PREFERRED_EH_DATA_FORMAT (2, 1)) { \
982 darwin_non_lazy_pcrel (ASM_OUT_FILE, ADDR); \
987 #define TARGET_TERMINATE_DW2_EH_FRAME_INFO false
989 #undef TARGET_ASM_NAMED_SECTION
990 #define TARGET_ASM_NAMED_SECTION darwin_asm_named_section
992 #define DARWIN_REGISTER_TARGET_PRAGMAS() \
994 c_register_pragma (0, "mark", darwin_pragma_ignore); \
995 c_register_pragma (0, "options", darwin_pragma_options); \
996 c_register_pragma (0, "segment", darwin_pragma_ignore); \
997 c_register_pragma (0, "unused", darwin_pragma_unused); \
1001 #define ASM_APP_ON ""
1003 #define ASM_APP_OFF ""
1005 void darwin_register_frameworks (const char *, const char *, int);
1006 void darwin_register_objc_includes (const char *, const char *, int);
1007 #define TARGET_EXTRA_PRE_INCLUDES darwin_register_objc_includes
1008 #define TARGET_EXTRA_INCLUDES darwin_register_frameworks
1010 void add_framework_path (char *);
1011 #define TARGET_OPTF add_framework_path
1013 #define TARGET_HAS_F_SETLKW
1015 /* Darwin before 7.0 does not have C99 functions. */
1016 #ifndef TARGET_C99_FUNCTIONS
1017 #define TARGET_C99_FUNCTIONS 0
1020 #define WINT_TYPE "int"
1022 #endif /* CONFIG_DARWIN_H */