1 /* Target definitions for Darwin (Mac OS X) systems.
2 Copyright (C) 1989, 1990, 1991, 1992, 1993, 2000, 2001, 2002, 2003, 2004,
4 Free Software Foundation, Inc.
5 Contributed by Apple Computer Inc.
7 This file is part of GCC.
9 GCC is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2, or (at your option)
14 GCC is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with GCC; see the file COPYING. If not, write to
21 the Free Software Foundation, 51 Franklin Street, Fifth Floor,
22 Boston, MA 02110-1301, USA. */
24 #ifndef CONFIG_DARWIN_H
25 #define CONFIG_DARWIN_H
27 /* The definitions in this file are common to all processor types
28 running Darwin, which is the kernel for Mac OS X. Darwin is
29 basically a BSD user layer laid over a Mach kernel, then evolved
30 for many years (at NeXT) in parallel with other Unix systems. So
31 while the runtime is a somewhat idiosyncratic Mach-based thing,
32 other definitions look like they would for a BSD variant. */
34 /* Although NeXT ran on many different architectures, as of Jan 2001
35 the only supported Darwin targets are PowerPC and x86. */
37 /* One of Darwin's NeXT legacies is the Mach-O format, which is partly
38 like a.out and partly like COFF, with additional features like
39 multi-architecture binary support. */
41 #define OBJECT_FORMAT_MACHO
43 /* Don't assume anything about the header files. */
44 #define NO_IMPLICIT_EXTERN_C
46 /* Suppress g++ attempt to link in the math library automatically. */
47 #define MATH_LIBRARY ""
53 /* Define an empty body for the function do_global_dtors() in libgcc2.c. */
55 #define DO_GLOBAL_DTORS_BODY
57 /* The string value for __SIZE_TYPE__. */
60 #define SIZE_TYPE "long unsigned int"
63 /* Type used for ptrdiff_t, as a string used in a declaration. */
66 #define PTRDIFF_TYPE "int"
71 #define WCHAR_TYPE "int"
72 #undef WCHAR_TYPE_SIZE
73 #define WCHAR_TYPE_SIZE 32
75 /* Default to using the NeXT-style runtime, since that's what is
76 pre-installed on Darwin systems. */
78 #define NEXT_OBJC_RUNTIME
80 /* Don't default to pcc-struct-return, because gcc is the only compiler, and
81 we want to retain compatibility with older gcc versions. */
83 #undef DEFAULT_PCC_STRUCT_RETURN
84 #define DEFAULT_PCC_STRUCT_RETURN 0
86 /* True if pragma ms_struct is in effect. */
87 extern GTY(()) int darwin_ms_struct;
89 /* This table intercepts weirdo options whose names would interfere
90 with normal driver conventions, and either translates them into
91 standardly-named options, or adds a 'Z' so that they can get to
92 specs processing without interference.
94 Do not expand a linker option to "-Xlinker -<option>", since that
95 forfeits the ability to control via spec strings later. However,
96 as a special exception, do this translation with -filelist, because
97 otherwise the driver will think there are no input files and quit.
98 (The alternative would be to hack the driver to recognize -filelist
99 specially, but it's simpler to use the translation table.)
101 Note that an option name with a prefix that matches another option
102 name, that also takes an argument, needs to be modified so the
103 prefix is different, otherwise a '*' after the shorter option will
104 match with the longer one.
106 The SUBTARGET_OPTION_TRANSLATE_TABLE macro, which _must_ be defined
107 in gcc/config/{i386,rs6000}/darwin.h, should contain any additional
108 command-line option translations specific to the particular target
111 #define TARGET_OPTION_TRANSLATE_TABLE \
112 { "-all_load", "-Zall_load" }, \
113 { "-allowable_client", "-Zallowable_client" }, \
114 { "-arch_errors_fatal", "-Zarch_errors_fatal" }, \
115 { "-bind_at_load", "-Zbind_at_load" }, \
116 { "-bundle", "-Zbundle" }, \
117 { "-bundle_loader", "-Zbundle_loader" }, \
118 { "-weak_reference_mismatches", "-Zweak_reference_mismatches" }, \
119 { "-dead_strip", "-Zdead_strip" }, \
120 { "-no_dead_strip_inits_and_terms", "-Zno_dead_strip_inits_and_terms" }, \
121 { "-dependency-file", "-MF" }, \
122 { "-dylib_file", "-Zdylib_file" }, \
123 { "-dynamic", "-Zdynamic" }, \
124 { "-dynamiclib", "-Zdynamiclib" }, \
125 { "-exported_symbols_list", "-Zexported_symbols_list" }, \
126 { "-gfull", "-g -fno-eliminate-unused-debug-symbols" }, \
127 { "-gused", "-g -feliminate-unused-debug-symbols" }, \
128 { "-segaddr", "-Zsegaddr" }, \
129 { "-segs_read_only_addr", "-Zsegs_read_only_addr" }, \
130 { "-segs_read_write_addr", "-Zsegs_read_write_addr" }, \
131 { "-seg_addr_table", "-Zseg_addr_table" }, \
132 { "-seg_addr_table_filename", "-Zfn_seg_addr_table_filename" }, \
133 { "-fapple-kext", "-fapple-kext -static -Wa,-static" }, \
134 { "-filelist", "-Xlinker -filelist -Xlinker" }, \
135 { "-findirect-virtual-calls", "-fapple-kext" }, \
136 { "-flat_namespace", "-Zflat_namespace" }, \
137 { "-force_cpusubtype_ALL", "-Zforce_cpusubtype_ALL" }, \
138 { "-force_flat_namespace", "-Zforce_flat_namespace" }, \
139 { "-framework", "-Xlinker -framework -Xlinker" }, \
140 { "-fterminated-vtables", "-fapple-kext" }, \
141 { "-image_base", "-Zimage_base" }, \
142 { "-init", "-Zinit" }, \
143 { "-install_name", "-Zinstall_name" }, \
144 { "-mkernel", "-mkernel -static -Wa,-static" }, \
145 { "-multiply_defined_unused", "-Zmultiplydefinedunused" }, \
146 { "-multiply_defined", "-Zmultiply_defined" }, \
147 { "-multi_module", "-Zmulti_module" }, \
148 { "-static", "-static -Wa,-static" }, \
149 { "-single_module", "-Zsingle_module" }, \
150 { "-unexported_symbols_list", "-Zunexported_symbols_list" }, \
151 SUBTARGET_OPTION_TRANSLATE_TABLE
153 #define SUBSUBTARGET_OVERRIDE_OPTIONS \
155 darwin_override_options (); \
158 /* These compiler options take n arguments. */
160 #undef WORD_SWITCH_TAKES_ARG
161 #define WORD_SWITCH_TAKES_ARG(STR) \
162 (DEFAULT_WORD_SWITCH_TAKES_ARG (STR) ? 1 : \
163 !strcmp (STR, "Zallowable_client") ? 1 : \
164 !strcmp (STR, "arch") ? 1 : \
165 !strcmp (STR, "arch_only") ? 1 : \
166 !strcmp (STR, "Zbundle_loader") ? 1 : \
167 !strcmp (STR, "client_name") ? 1 : \
168 !strcmp (STR, "compatibility_version") ? 1 : \
169 !strcmp (STR, "current_version") ? 1 : \
170 !strcmp (STR, "Zdylib_file") ? 1 : \
171 !strcmp (STR, "Zexported_symbols_list") ? 1 : \
172 !strcmp (STR, "Zimage_base") ? 1 : \
173 !strcmp (STR, "Zinit") ? 1 : \
174 !strcmp (STR, "Zinstall_name") ? 1 : \
175 !strcmp (STR, "Zmultiplydefinedunused") ? 1 : \
176 !strcmp (STR, "Zmultiply_defined") ? 1 : \
177 !strcmp (STR, "precomp-trustfile") ? 1 : \
178 !strcmp (STR, "read_only_relocs") ? 1 : \
179 !strcmp (STR, "sectcreate") ? 3 : \
180 !strcmp (STR, "sectorder") ? 3 : \
181 !strcmp (STR, "Zsegaddr") ? 2 : \
182 !strcmp (STR, "Zsegs_read_only_addr") ? 1 : \
183 !strcmp (STR, "Zsegs_read_write_addr") ? 1 : \
184 !strcmp (STR, "Zseg_addr_table") ? 1 : \
185 !strcmp (STR, "Zfn_seg_addr_table_filename") ? 1 :\
186 !strcmp (STR, "seg1addr") ? 1 : \
187 !strcmp (STR, "segprot") ? 3 : \
188 !strcmp (STR, "sub_library") ? 1 : \
189 !strcmp (STR, "sub_umbrella") ? 1 : \
190 !strcmp (STR, "umbrella") ? 1 : \
191 !strcmp (STR, "undefined") ? 1 : \
192 !strcmp (STR, "Zunexported_symbols_list") ? 1 : \
193 !strcmp (STR, "Zweak_reference_mismatches") ? 1 : \
194 !strcmp (STR, "pagezero_size") ? 1 : \
195 !strcmp (STR, "segs_read_only_addr") ? 1 : \
196 !strcmp (STR, "segs_read_write_addr") ? 1 : \
197 !strcmp (STR, "sectalign") ? 3 : \
198 !strcmp (STR, "sectobjectsymbols") ? 2 : \
199 !strcmp (STR, "segcreate") ? 3 : \
200 !strcmp (STR, "dylinker_install_name") ? 1 : \
203 #define SUBTARGET_C_COMMON_OVERRIDE_OPTIONS do { \
204 if (flag_mkernel || flag_apple_kext) \
206 if (flag_use_cxa_atexit == 2) \
207 flag_use_cxa_atexit = 0; \
208 /* kexts should always be built without the coalesced sections \
209 because the kernel loader doesn't grok such sections. */ \
211 /* No RTTI in kexts. */ \
216 /* Machine dependent cpp options. Don't add more options here, add
217 them to darwin_cpp_builtins in darwin-c.c. */
220 #define CPP_SPEC "%{static:%{!dynamic:-D__STATIC__}}%{!static:-D__DYNAMIC__}" \
221 " %{pthread:-D_REENTRANT}"
223 /* This is mostly a clone of the standard LINK_COMMAND_SPEC, plus
224 precomp, libtool, and fat build additions. Also we
225 don't specify a second %G after %L because libSystem is
226 self-contained and doesn't need to link against libgcc.a. */
227 /* In general, random Darwin linker flags should go into LINK_SPEC
228 instead of LINK_COMMAND_SPEC. The command spec is better for
229 specifying the handling of options understood by generic Unix
230 linkers, and for positional arguments like libraries. */
231 #define LINK_COMMAND_SPEC "\
232 %{!fdump=*:%{!fsyntax-only:%{!c:%{!M:%{!MM:%{!E:%{!S:\
233 %{!Zdynamiclib:%(linker)}%{Zdynamiclib:/usr/bin/libtool} \
234 %l %X %{d} %{s} %{t} %{Z} \
235 %{!Zdynamiclib:%{A} %{e*} %{m} %{N} %{n} %{r} %{u*} %{x} %{z}} \
236 %{o*}%{!o:-o a.out} \
237 %{!A:%{!nostdlib:%{!nostartfiles:%S}}} \
238 %{L*} %{fopenmp:%:include(libgomp.spec)%(link_gomp)} \
239 %(link_libgcc) %o %{fprofile-arcs|fprofile-generate|coverage:-lgcov} \
240 %{!nostdlib:%{!nodefaultlibs:%(link_ssp) %G %L}} \
241 %{!A:%{!nostdlib:%{!nostartfiles:%E}}} %{T*} %{F*} }}}}}}}\n\
242 %{!fdump=*:%{!fsyntax-only:%{!c:%{!M:%{!MM:%{!E:%{!S:\
243 %{.c|.cc|.C|.cpp|.c++|.CPP|.m|.mm: \
244 %{g*:%{!gstabs*:%{!gnone: dsymutil %{o*:%*}%{!o:a.out}}}}}}}}}}}}"
246 #ifdef TARGET_SYSTEM_ROOT
247 #define LINK_SYSROOT_SPEC \
248 "%{isysroot*:-syslibroot %*;:-syslibroot " TARGET_SYSTEM_ROOT "}"
250 #define LINK_SYSROOT_SPEC "%{isysroot*:-syslibroot %*}"
253 /* Please keep the random linker options in alphabetical order (modulo
254 'Z' and 'no' prefixes). Options that can only go to one of libtool
255 or ld must be listed twice, under both !Zdynamiclib and
256 Zdynamiclib, with one of the cases reporting an error. */
257 /* Note that options taking arguments may appear multiple times on a
258 command line with different arguments each time, so put a * after
259 their names so all of them get passed. */
261 "%{static}%{!static:-dynamic} \
262 %{fgnu-runtime:%:replace-outfile(-lobjc -lobjc-gnu)}\
264 %{Zforce_cpusubtype_ALL:-arch %(darwin_arch) -force_cpusubtype_ALL} \
265 %{!Zforce_cpusubtype_ALL:-arch %(darwin_subarch)} \
267 %{Zbundle_loader*:-bundle_loader %*} \
269 %{compatibility_version*:%e-compatibility_version only allowed with -dynamiclib\
271 %{current_version*:%e-current_version only allowed with -dynamiclib} \
272 %{Zforce_flat_namespace:-force_flat_namespace} \
273 %{Zinstall_name*:%e-install_name only allowed with -dynamiclib} \
274 %{keep_private_externs} \
278 %{Zbundle:%e-bundle not allowed with -dynamiclib} \
279 %{Zbundle_loader*:%e-bundle_loader not allowed with -dynamiclib} \
280 %{client_name*:%e-client_name not allowed with -dynamiclib} \
281 %{compatibility_version*} \
282 %{current_version*} \
283 %{Zforce_cpusubtype_ALL:-arch_only %(darwin_arch)} \
284 %{!Zforce_cpusubtype_ALL: -arch_only %(darwin_subarch)} \
285 %{Zforce_flat_namespace:%e-force_flat_namespace not allowed with -dynamiclib} \
286 %{Zinstall_name*:-install_name %*} \
287 %{keep_private_externs:%e-keep_private_externs not allowed with -dynamiclib} \
288 %{private_bundle:%e-private_bundle not allowed with -dynamiclib} \
290 %{Zall_load:-all_load}%{Zdynamiclib:%{!Zall_load:-noall_load}} \
291 %{Zallowable_client*:-allowable_client %*} \
292 %{Zbind_at_load:-bind_at_load} \
293 %{Zarch_errors_fatal:-arch_errors_fatal} \
294 %{Zdead_strip:-dead_strip} \
295 %{Zno_dead_strip_inits_and_terms:-no_dead_strip_inits_and_terms} \
296 %{Zdylib_file*:-dylib_file %*} \
297 %{Zdynamic:-dynamic}\
298 %{Zexported_symbols_list*:-exported_symbols_list %*} \
299 %{Zflat_namespace:-flat_namespace} \
300 %{headerpad_max_install_names*} \
301 %{Zimage_base*:-image_base %*} \
303 %{mmacosx-version-min=*:-macosx_version_min %*} \
304 %{!mmacosx-version-min=*:%{shared-libgcc:-macosx_version_min 10.3}} \
306 %{Zmulti_module:-multi_module} %{Zsingle_module:-single_module} \
307 %{Zmultiply_defined*:-multiply_defined %*} \
308 %{!Zmultiply_defined*:%{shared-libgcc: \
309 %:version-compare(< 10.5 mmacosx-version-min= -multiply_defined) \
310 %:version-compare(< 10.5 mmacosx-version-min= suppress)}} \
311 %{Zmultiplydefinedunused*:-multiply_defined_unused %*} \
312 %{prebind} %{noprebind} %{nofixprebinding} %{prebind_all_twolevel_modules} \
313 %{read_only_relocs} \
314 %{sectcreate*} %{sectorder*} %{seg1addr*} %{segprot*} \
315 %{Zsegaddr*:-segaddr %*} \
316 %{Zsegs_read_only_addr*:-segs_read_only_addr %*} \
317 %{Zsegs_read_write_addr*:-segs_read_write_addr %*} \
318 %{Zseg_addr_table*: -seg_addr_table %*} \
319 %{Zfn_seg_addr_table_filename*:-seg_addr_table_filename %*} \
320 %{sub_library*} %{sub_umbrella*} \
321 " LINK_SYSROOT_SPEC " \
322 %{twolevel_namespace} %{twolevel_namespace_hints} \
325 %{Zunexported_symbols_list*:-unexported_symbols_list %*} \
326 %{Zweak_reference_mismatches*:-weak_reference_mismatches %*} \
327 %{!Zweak_reference_mismatches*:-weak_reference_mismatches non-weak} \
331 %{pagezero_size*} %{segs_read_*} %{seglinkedit} %{noseglinkedit} \
332 %{sectalign*} %{sectobjectsymbols*} %{segcreate*} %{whyload} \
333 %{whatsloaded} %{dylinker_install_name*} \
334 %{dylinker} %{Mach} "
337 /* Machine dependent libraries. */
339 #define LIB_SPEC "%{!static:-lSystem}"
341 /* Support -mmacosx-version-min by supplying different (stub) libgcc_s.dylib
342 libraries to link against, and by not linking against libgcc_s on
345 Note that by default, -lgcc_eh is not linked against! This is
346 because in a future version of Darwin the EH frame information may
347 be in a new format, or the fallback routine might be changed; if
348 you want to explicitly link against the static version of those
349 routines, because you know you don't need to unwind through system
350 libraries, you need to explicitly say -static-libgcc.
352 If it is linked against, it has to be before -lgcc, because it may
353 need symbols from -lgcc. */
354 #undef REAL_LIBGCC_SPEC
355 #define REAL_LIBGCC_SPEC \
356 "%{static-libgcc|static: -lgcc_eh -lgcc; \
357 shared-libgcc|fexceptions: \
358 %:version-compare(!> 10.5 mmacosx-version-min= -lgcc_s.10.4) \
359 %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_s.10.5) \
361 :%:version-compare(>< 10.3.9 10.5 mmacosx-version-min= -lgcc_s.10.4) \
362 %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_s.10.5) \
365 /* We specify crt0.o as -lcrt0.o so that ld will search the library path.
367 crt3.o provides __cxa_atexit on systems that don't have it. Since
368 it's only used with C++, which requires passing -shared-libgcc, key
369 off that to avoid unnecessarily adding a destructor to every
370 powerpc program built. */
372 #undef STARTFILE_SPEC
373 #define STARTFILE_SPEC \
374 "%{!Zdynamiclib:%{Zbundle:%{!static:-lbundle1.o}} \
375 %{!Zbundle:%{pg:%{static:-lgcrt0.o} \
376 %{!static:%{object:-lgcrt0.o} \
377 %{!object:%{preload:-lgcrt0.o} \
378 %{!preload:-lgcrt1.o %(darwin_crt2)}}}} \
379 %{!pg:%{static:-lcrt0.o} \
380 %{!static:%{object:-lcrt0.o} \
381 %{!object:%{preload:-lcrt0.o} \
382 %{!preload:-lcrt1.o %(darwin_crt2)}}}}}} \
383 %{shared-libgcc:%:version-compare(< 10.5 mmacosx-version-min= crt3.o%s)}"
385 /* The native Darwin linker doesn't necessarily place files in the order
386 that they're specified on the link line. Thus, it is pointless
387 to put anything in ENDFILE_SPEC. */
388 /* #define ENDFILE_SPEC "" */
390 /* Default Darwin ASM_SPEC, very simple. */
391 #define ASM_SPEC "-arch %(darwin_arch) \
392 %{Zforce_cpusubtype_ALL:-force_cpusubtype_ALL}"
394 /* We still allow output of STABS. */
396 #define DBX_DEBUGGING_INFO 1
399 #define DWARF2_DEBUGGING_INFO
400 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
402 #define DEBUG_FRAME_SECTION "__DWARF,__debug_frame,regular,debug"
403 #define DEBUG_INFO_SECTION "__DWARF,__debug_info,regular,debug"
404 #define DEBUG_ABBREV_SECTION "__DWARF,__debug_abbrev,regular,debug"
405 #define DEBUG_ARANGES_SECTION "__DWARF,__debug_aranges,regular,debug"
406 #define DEBUG_MACINFO_SECTION "__DWARF,__debug_macinfo,regular,debug"
407 #define DEBUG_LINE_SECTION "__DWARF,__debug_line,regular,debug"
408 #define DEBUG_LOC_SECTION "__DWARF,__debug_loc,regular,debug"
409 #define DEBUG_PUBNAMES_SECTION "__DWARF,__debug_pubnames,regular,debug"
410 #define DEBUG_PUBTYPES_SECTION "__DWARF,__debug_pubtypes,regular,debug"
411 #define DEBUG_STR_SECTION "__DWARF,__debug_str,regular,debug"
412 #define DEBUG_RANGES_SECTION "__DWARF,__debug_ranges,regular,debug"
414 /* When generating stabs debugging, use N_BINCL entries. */
416 #define DBX_USE_BINCL
418 /* There is no limit to the length of stabs strings. */
420 #define DBX_CONTIN_LENGTH 0
422 /* gdb needs a null N_SO at the end of each file for scattered loading. */
424 #define DBX_OUTPUT_NULL_N_SO_AT_MAIN_SOURCE_FILE_END
426 /* GCC's definition of 'one_only' is the same as its definition of 'weak'. */
427 #define MAKE_DECL_ONE_ONLY(DECL) (DECL_WEAK (DECL) = 1)
429 /* Mach-O supports 'weak imports', and 'weak definitions' in coalesced
430 sections. machopic_select_section ensures that weak variables go in
431 coalesced sections. Weak aliases (or any other kind of aliases) are
432 not supported. Weak symbols that aren't visible outside the .s file
433 are not supported. */
434 #define ASM_WEAKEN_DECL(FILE, DECL, NAME, ALIAS) \
438 warning (0, "alias definitions not supported in Mach-O; ignored"); \
442 if (! DECL_EXTERNAL (DECL) && TREE_PUBLIC (DECL)) \
443 targetm.asm_out.globalize_label (FILE, NAME); \
444 if (DECL_EXTERNAL (DECL)) \
445 fputs ("\t.weak_reference ", FILE); \
446 else if (! lookup_attribute ("weak", DECL_ATTRIBUTES (DECL)) \
447 && lookup_attribute ("weak_import", DECL_ATTRIBUTES (DECL))) \
449 else if (TREE_PUBLIC (DECL)) \
450 fputs ("\t.weak_definition ", FILE); \
453 assemble_name (FILE, NAME); \
454 fputc ('\n', FILE); \
457 /* Darwin has the pthread routines in libSystem, which every program
458 links to, so there's no need for weak-ness for that. */
459 #define GTHREAD_USE_WEAK 0
461 /* The Darwin linker imposes two limitations on common symbols: they
462 can't have hidden visibility, and they can't appear in dylibs. As
463 a consequence, we should never use common symbols to represent
465 #undef USE_COMMON_FOR_ONE_ONLY
466 #define USE_COMMON_FOR_ONE_ONLY 0
468 /* The Darwin linker doesn't want coalesced symbols to appear in
469 a static archive's table of contents. */
470 #undef TARGET_WEAK_NOT_IN_ARCHIVE_TOC
471 #define TARGET_WEAK_NOT_IN_ARCHIVE_TOC 1
473 /* On Darwin, we don't (at the time of writing) have linkonce sections
474 with names, so it's safe to make the class data not comdat. */
475 #define TARGET_CXX_CLASS_DATA_ALWAYS_COMDAT hook_bool_void_false
477 /* We make exception information linkonce. */
478 #undef TARGET_USES_WEAK_UNWIND_INFO
479 #define TARGET_USES_WEAK_UNWIND_INFO 1
481 /* We need to use a nonlocal label for the start of an EH frame: the
482 Darwin linker requires that a coalesced section start with a label.
483 Unfortunately, it also requires that 'debug' sections don't contain
485 #undef FRAME_BEGIN_LABEL
486 #define FRAME_BEGIN_LABEL (for_eh ? "EH_frame" : "Lframe")
488 /* Emit a label for the FDE corresponding to DECL. EMPTY means
489 emit a label for an empty FDE. */
490 #define TARGET_ASM_EMIT_UNWIND_LABEL darwin_emit_unwind_label
492 /* Emit a label to separate the exception table. */
493 #define TARGET_ASM_EMIT_EXCEPT_TABLE_LABEL darwin_emit_except_table_label
495 /* Our profiling scheme doesn't LP labels and counter words. */
497 #define NO_PROFILE_COUNTERS 1
499 #undef INIT_SECTION_ASM_OP
500 #define INIT_SECTION_ASM_OP
504 #define TARGET_ASM_CONSTRUCTOR machopic_asm_out_constructor
505 #define TARGET_ASM_DESTRUCTOR machopic_asm_out_destructor
507 /* Always prefix with an underscore. */
509 #define USER_LABEL_PREFIX "_"
511 /* Don't output a .file directive. That is only used by the assembler for
513 #undef TARGET_ASM_FILE_START_FILE_DIRECTIVE
514 #define TARGET_ASM_FILE_START_FILE_DIRECTIVE false
516 #undef TARGET_ASM_FILE_END
517 #define TARGET_ASM_FILE_END darwin_file_end
519 #define ASM_OUTPUT_SKIP(FILE,SIZE) \
520 fprintf (FILE, "\t.space "HOST_WIDE_INT_PRINT_UNSIGNED"\n", SIZE)
522 /* Give ObjC methods pretty symbol names. */
524 #undef OBJC_GEN_METHOD_LABEL
525 #define OBJC_GEN_METHOD_LABEL(BUF,IS_INST,CLASS_NAME,CAT_NAME,SEL_NAME,NUM) \
527 sprintf (BUF, "%c[%s(%s) %s]", (IS_INST) ? '-' : '+', \
528 (CLASS_NAME), (CAT_NAME), (SEL_NAME)); \
530 sprintf (BUF, "%c[%s %s]", (IS_INST) ? '-' : '+', \
531 (CLASS_NAME), (SEL_NAME)); \
534 /* The RTTI data (e.g., __ti4name) is common and public (and static),
535 but it does need to be referenced via indirect PIC data pointers.
536 The machopic_define_symbol calls are telling the machopic subsystem
537 that the name *is* defined in this module, so it doesn't need to
538 make them indirect. */
540 #undef ASM_DECLARE_OBJECT_NAME
541 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL) \
543 const char *xname = NAME; \
544 if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF) \
545 xname = IDENTIFIER_POINTER (DECL_NAME (DECL)); \
546 if (! DECL_WEAK (DECL) \
547 && ((TREE_STATIC (DECL) \
548 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
549 || DECL_INITIAL (DECL))) \
550 machopic_define_symbol (DECL_RTL (DECL)); \
551 if ((TREE_STATIC (DECL) \
552 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
553 || DECL_INITIAL (DECL)) \
554 (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false); \
555 ASM_OUTPUT_LABEL (FILE, xname); \
556 /* Darwin doesn't support zero-size objects, so give them a \
558 if (tree_low_cst (DECL_SIZE_UNIT (DECL), 1) == 0) \
559 assemble_zeros (1); \
562 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
564 const char *xname = NAME; \
565 if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF) \
566 xname = IDENTIFIER_POINTER (DECL_NAME (DECL)); \
567 if (! DECL_WEAK (DECL) \
568 && ((TREE_STATIC (DECL) \
569 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
570 || DECL_INITIAL (DECL))) \
571 machopic_define_symbol (DECL_RTL (DECL)); \
572 if ((TREE_STATIC (DECL) \
573 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
574 || DECL_INITIAL (DECL)) \
575 (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false); \
576 ASM_OUTPUT_LABEL (FILE, xname); \
579 #define ASM_DECLARE_CONSTANT_NAME(FILE, NAME, EXP, SIZE) \
581 ASM_OUTPUT_LABEL (FILE, NAME); \
582 /* Darwin doesn't support zero-size objects, so give them a \
585 assemble_zeros (1); \
588 /* Wrap new method names in quotes so the assembler doesn't gag.
589 Make Objective-C internal symbols local. */
591 #undef ASM_OUTPUT_LABELREF
592 #define ASM_OUTPUT_LABELREF(FILE,NAME) \
594 const char *xname = (NAME); \
595 if (! strcmp (xname, "<pic base>")) \
596 machopic_output_function_base_name(FILE); \
597 else if (xname[0] == '&' || xname[0] == '*') \
599 int len = strlen (xname); \
600 if (len > 6 && !strcmp ("$stub", xname + len - 5)) \
601 machopic_validate_stub_or_non_lazy_ptr (xname); \
602 else if (len > 7 && !strcmp ("$stub\"", xname + len - 6)) \
603 machopic_validate_stub_or_non_lazy_ptr (xname); \
604 else if (len > 14 && !strcmp ("$non_lazy_ptr", xname + len - 13)) \
605 machopic_validate_stub_or_non_lazy_ptr (xname); \
606 else if (len > 15 && !strcmp ("$non_lazy_ptr\"", xname + len - 14)) \
607 machopic_validate_stub_or_non_lazy_ptr (xname); \
608 if (xname[1] != '"' && name_needs_quotes (&xname[1])) \
609 fprintf (FILE, "\"%s\"", &xname[1]); \
611 fputs (&xname[1], FILE); \
613 else if (xname[0] == '+' || xname[0] == '-') \
614 fprintf (FILE, "\"%s\"", xname); \
615 else if (!strncmp (xname, "_OBJC_", 6)) \
616 fprintf (FILE, "L%s", xname); \
617 else if (!strncmp (xname, ".objc_class_name_", 17)) \
618 fprintf (FILE, "%s", xname); \
619 else if (xname[0] != '"' && name_needs_quotes (xname)) \
620 fprintf (FILE, "\"%s\"", xname); \
622 asm_fprintf (FILE, "%U%s", xname); \
625 /* Output before executable code. */
626 #undef TEXT_SECTION_ASM_OP
627 #define TEXT_SECTION_ASM_OP "\t.text"
629 /* Output before writable data. */
631 #undef DATA_SECTION_ASM_OP
632 #define DATA_SECTION_ASM_OP "\t.data"
635 #define ALIGN_ASM_OP ".align"
637 #undef ASM_OUTPUT_ALIGN
638 #define ASM_OUTPUT_ALIGN(FILE,LOG) \
640 fprintf (FILE, "\t%s %d\n", ALIGN_ASM_OP, (LOG))
642 /* Ensure correct alignment of bss data. */
644 #undef ASM_OUTPUT_ALIGNED_DECL_LOCAL
645 #define ASM_OUTPUT_ALIGNED_DECL_LOCAL(FILE, DECL, NAME, SIZE, ALIGN) \
647 unsigned HOST_WIDE_INT _new_size = SIZE; \
648 fputs (".lcomm ", (FILE)); \
649 assemble_name ((FILE), (NAME)); \
650 if (_new_size == 0) _new_size = 1; \
651 fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED",%u\n", _new_size, \
652 floor_log2 ((ALIGN) / BITS_PER_UNIT)); \
653 if ((DECL) && ((TREE_STATIC (DECL) \
654 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
655 || DECL_INITIAL (DECL))) \
657 (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false); \
658 machopic_define_symbol (DECL_RTL (DECL)); \
662 /* The maximum alignment which the object file format can support.
663 For Mach-O, this is 2^15. */
665 #undef MAX_OFILE_ALIGNMENT
666 #define MAX_OFILE_ALIGNMENT 0x8000
668 /* Declare the section variables. */
669 #ifndef USED_FOR_TARGET
670 enum darwin_section_enum {
671 #define DEF_SECTION(NAME, FLAGS, DIRECTIVE, OBJC) NAME,
672 #include "darwin-sections.def"
676 extern GTY(()) section * darwin_sections[NUM_DARWIN_SECTIONS];
679 #undef TARGET_ASM_SELECT_SECTION
680 #define TARGET_ASM_SELECT_SECTION machopic_select_section
681 #define USE_SELECT_SECTION_FOR_FUNCTIONS
683 #undef TARGET_ASM_SELECT_RTX_SECTION
684 #define TARGET_ASM_SELECT_RTX_SECTION machopic_select_rtx_section
685 #undef TARGET_ASM_UNIQUE_SECTION
686 #define TARGET_ASM_UNIQUE_SECTION darwin_unique_section
687 #undef TARGET_ASM_FUNCTION_RODATA_SECTION
688 #define TARGET_ASM_FUNCTION_RODATA_SECTION default_no_function_rodata_section
691 #define ASM_DECLARE_UNRESOLVED_REFERENCE(FILE,NAME) \
694 if (MACHOPIC_INDIRECT) \
695 fprintf (FILE, "\t.lazy_reference "); \
697 fprintf (FILE, "\t.reference "); \
698 assemble_name (FILE, NAME); \
699 fprintf (FILE, "\n"); \
703 #define ASM_DECLARE_CLASS_REFERENCE(FILE,NAME) \
706 fprintf (FILE, "\t"); \
707 assemble_name (FILE, NAME); \
708 fprintf (FILE, "=0\n"); \
709 (*targetm.asm_out.globalize_label) (FILE, NAME); \
713 /* Globalizing directive for a label. */
714 #define GLOBAL_ASM_OP ".globl "
715 #define TARGET_ASM_GLOBALIZE_LABEL darwin_globalize_label
717 /* Emit an assembler directive to set visibility for a symbol. Used
718 to support visibility attribute and Darwin's private extern
720 #undef TARGET_ASM_ASSEMBLE_VISIBILITY
721 #define TARGET_ASM_ASSEMBLE_VISIBILITY darwin_assemble_visibility
723 /* Extra attributes for Darwin. */
724 #define SUBTARGET_ATTRIBUTE_TABLE \
725 /* { name, min_len, max_len, decl_req, type_req, fn_type_req, handler } */ \
726 { "apple_kext_compatibility", 0, 0, false, true, false, \
727 darwin_handle_kext_attribute }, \
728 { "weak_import", 0, 0, true, false, false, \
729 darwin_handle_weak_import_attribute }
731 #undef ASM_GENERATE_INTERNAL_LABEL
732 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM) \
733 sprintf (LABEL, "*%s%ld", PREFIX, (long)(NUM))
735 #undef TARGET_ASM_MARK_DECL_PRESERVED
736 #define TARGET_ASM_MARK_DECL_PRESERVED darwin_mark_decl_preserved
738 /* Set on a symbol with SYMBOL_FLAG_FUNCTION or
739 MACHO_SYMBOL_FLAG_VARIABLE to indicate that the function or
740 variable has been defined in this translation unit.
741 When porting Mach-O to new architectures you need to make
742 sure these aren't clobbered by the backend. */
744 #define MACHO_SYMBOL_FLAG_VARIABLE (SYMBOL_FLAG_MACH_DEP)
745 #define MACHO_SYMBOL_FLAG_DEFINED ((SYMBOL_FLAG_MACH_DEP) << 1)
747 /* Set on a symbol to indicate when fix-and-continue style code
748 generation is being used and the symbol refers to a static symbol
749 that should be rebound from new instances of a translation unit to
750 the original instance of the data. */
752 #define MACHO_SYMBOL_STATIC ((SYMBOL_FLAG_MACH_DEP) << 2)
754 /* Symbolic names for various things we might know about a symbol. */
756 enum machopic_addr_class {
758 MACHOPIC_DEFINED_DATA,
759 MACHOPIC_UNDEFINED_DATA,
760 MACHOPIC_DEFINED_FUNCTION,
761 MACHOPIC_UNDEFINED_FUNCTION
764 /* Macros defining the various PIC cases. */
766 #define MACHO_DYNAMIC_NO_PIC_P (TARGET_DYNAMIC_NO_PIC)
767 #define MACHOPIC_INDIRECT (flag_pic || MACHO_DYNAMIC_NO_PIC_P)
768 #define MACHOPIC_JUST_INDIRECT (MACHO_DYNAMIC_NO_PIC_P)
769 #define MACHOPIC_PURE (flag_pic && ! MACHO_DYNAMIC_NO_PIC_P)
771 #undef TARGET_ENCODE_SECTION_INFO
772 #define TARGET_ENCODE_SECTION_INFO darwin_encode_section_info
773 #undef TARGET_STRIP_NAME_ENCODING
774 #define TARGET_STRIP_NAME_ENCODING default_strip_name_encoding
776 #define GEN_BINDER_NAME_FOR_STUB(BUF,STUB,STUB_LENGTH) \
778 const char *const stub_ = (STUB); \
779 char *buffer_ = (BUF); \
780 strcpy (buffer_, stub_); \
781 if (stub_[0] == '"') \
783 strcpy (buffer_ + (STUB_LENGTH) - 1, "_binder\""); \
787 strcpy (buffer_ + (STUB_LENGTH), "_binder"); \
791 #define GEN_SYMBOL_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH) \
793 const char *const symbol_ = (SYMBOL); \
794 char *buffer_ = (BUF); \
795 if (name_needs_quotes (symbol_) && symbol_[0] != '"') \
797 sprintf (buffer_, "\"%s\"", symbol_); \
801 strcpy (buffer_, symbol_); \
805 /* Given a symbol name string, create the lazy pointer version
806 of the symbol name. */
808 #define GEN_LAZY_PTR_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH) \
810 const char *symbol_ = (SYMBOL); \
811 char *buffer_ = (BUF); \
812 if (symbol_[0] == '"') \
814 strcpy (buffer_, "\"L"); \
815 strcpy (buffer_ + 2, symbol_ + 1); \
816 strcpy (buffer_ + (SYMBOL_LENGTH), "$lazy_ptr\""); \
818 else if (name_needs_quotes (symbol_)) \
820 strcpy (buffer_, "\"L"); \
821 strcpy (buffer_ + 2, symbol_); \
822 strcpy (buffer_ + (SYMBOL_LENGTH) + 2, "$lazy_ptr\""); \
826 strcpy (buffer_, "L"); \
827 strcpy (buffer_ + 1, symbol_); \
828 strcpy (buffer_ + (SYMBOL_LENGTH) + 1, "$lazy_ptr"); \
832 #define EH_FRAME_SECTION_NAME "__TEXT"
833 #define EH_FRAME_SECTION_ATTR ",coalesced,no_toc+strip_static_syms+live_support"
835 /* Java runtime class list. */
836 #define JCR_SECTION_NAME "__DATA,jcr,regular,no_dead_strip"
838 #undef ASM_PREFERRED_EH_DATA_FORMAT
839 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL) \
840 (((CODE) == 2 && (GLOBAL) == 1) \
841 ? (DW_EH_PE_pcrel | DW_EH_PE_indirect | DW_EH_PE_sdata4) : \
842 ((CODE) == 1 || (GLOBAL) == 0) ? DW_EH_PE_pcrel : DW_EH_PE_absptr)
844 #define ASM_OUTPUT_DWARF_DELTA(FILE,SIZE,LABEL1,LABEL2) \
845 darwin_asm_output_dwarf_delta (FILE, SIZE, LABEL1, LABEL2)
847 #define ASM_OUTPUT_DWARF_OFFSET(FILE,SIZE,LABEL,BASE) \
848 darwin_asm_output_dwarf_offset (FILE, SIZE, LABEL, BASE)
850 #define ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX(ASM_OUT_FILE, ENCODING, SIZE, ADDR, DONE) \
851 if (ENCODING == ASM_PREFERRED_EH_DATA_FORMAT (2, 1)) { \
852 darwin_non_lazy_pcrel (ASM_OUT_FILE, ADDR); \
856 /* Experimentally, putting jump tables in text is faster on SPEC.
857 Also this is needed for correctness for coalesced functions. */
859 #ifndef JUMP_TABLES_IN_TEXT_SECTION
860 #define JUMP_TABLES_IN_TEXT_SECTION 1
863 #define TARGET_TERMINATE_DW2_EH_FRAME_INFO false
865 #define TARGET_ASM_INIT_SECTIONS darwin_init_sections
866 #undef TARGET_ASM_NAMED_SECTION
867 #define TARGET_ASM_NAMED_SECTION darwin_asm_named_section
869 /* Handle pragma weak and pragma pack. */
870 #define HANDLE_SYSV_PRAGMA 1
872 #define HANDLE_PRAGMA_PACK_PUSH_POP 1
874 #define DARWIN_REGISTER_TARGET_PRAGMAS() \
876 c_register_pragma (0, "mark", darwin_pragma_ignore); \
877 c_register_pragma (0, "options", darwin_pragma_options); \
878 c_register_pragma (0, "segment", darwin_pragma_ignore); \
879 c_register_pragma (0, "unused", darwin_pragma_unused); \
880 c_register_pragma (0, "ms_struct", darwin_pragma_ms_struct); \
884 #define ASM_APP_ON ""
886 #define ASM_APP_OFF ""
888 void darwin_register_frameworks (const char *, const char *, int);
889 void darwin_register_objc_includes (const char *, const char *, int);
890 #define TARGET_EXTRA_PRE_INCLUDES darwin_register_objc_includes
891 #define TARGET_EXTRA_INCLUDES darwin_register_frameworks
893 void add_framework_path (char *);
894 #define TARGET_OPTF add_framework_path
896 #define TARGET_POSIX_IO
898 /* All new versions of Darwin have C99 functions. */
900 #define TARGET_C99_FUNCTIONS 1
902 #define WINT_TYPE "int"
904 /* Every program on darwin links against libSystem which contains the pthread
905 routines, so there's no need to explicitly call out when doing threaded
908 #undef GOMP_SELF_SPECS
909 #define GOMP_SELF_SPECS ""
911 /* Darwin can't support anchors until we can cope with the adjustments
912 to size that ASM_DECLARE_OBJECT_NAME and ASM_DECLARE_CONSTANT_NAME
913 when outputting members of an anchor block and the linker can be
914 taught to keep them together or we find some other suitable
915 code-gen technique. */
918 #define TARGET_ASM_OUTPUT_ANCHOR darwin_asm_output_anchor
920 #define TARGET_ASM_OUTPUT_ANCHOR NULL
923 /* Attempt to turn on execute permission for the stack. This may be
924 used by INITIALIZE_TRAMPOLINE of the target needs it (that is,
925 if the target machine can change execute permissions on a page).
927 There is no way to query the execute permission of the stack, so
928 we always issue the mprotect() call.
930 Unfortunately it is not possible to make this namespace-clean.
932 Also note that no errors should be emitted by this code; it is
933 considered dangerous for library calls to send messages to
936 #define ENABLE_EXECUTE_STACK \
937 extern void __enable_execute_stack (void *); \
939 __enable_execute_stack (void *addr) \
941 extern int mprotect (void *, size_t, int); \
942 extern int getpagesize (void); \
950 size = getpagesize(); \
951 mask = ~((long) size - 1); \
954 page = (char *) (((long) addr) & mask); \
955 end = (char *) ((((long) (addr + (TARGET_64BIT ? 48 : 40))) & mask) + size); \
957 /* 7 == PROT_READ | PROT_WRITE | PROT_EXEC */ \
958 (void) mprotect (page, end - page, 7); \
961 /* For Apple KEXTs, we make the constructors return this to match gcc
963 #define TARGET_CXX_CDTOR_RETURNS_THIS (darwin_kextabi_p)
964 extern int flag_mkernel;
965 extern int flag_apple_kext;
966 #define TARGET_KEXTABI flag_apple_kext
968 #endif /* CONFIG_DARWIN_H */