1/* Target definitions for Darwin (Mac OS X) systems. 2 Copyright (C) 1989-2015 Free Software Foundation, Inc. 3 Contributed by Apple Computer Inc. 4 5This file is part of GCC. 6 7GCC is free software; you can redistribute it and/or modify 8it under the terms of the GNU General Public License as published by 9the Free Software Foundation; either version 3, or (at your option) 10any later version. 11 12GCC is distributed in the hope that it will be useful, 13but WITHOUT ANY WARRANTY; without even the implied warranty of 14MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15GNU General Public License for more details. 16 17Under Section 7 of GPL version 3, you are granted additional 18permissions described in the GCC Runtime Library Exception, version 193.1, as published by the Free Software Foundation. 20 21You should have received a copy of the GNU General Public License and 22a copy of the GCC Runtime Library Exception along with this program; 23see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 24<http://www.gnu.org/licenses/>. */ 25 26#ifndef CONFIG_DARWIN_H 27#define CONFIG_DARWIN_H 28 29/* The definitions in this file are common to all processor types 30 running Darwin, which is the kernel for Mac OS X. Darwin is 31 basically a BSD user layer laid over a Mach kernel, then evolved 32 for many years (at NeXT) in parallel with other Unix systems. So 33 while the runtime is a somewhat idiosyncratic Mach-based thing, 34 other definitions look like they would for a BSD variant. */ 35 36/* Although NeXT ran on many different architectures, as of Jan 2001 37 the only supported Darwin targets are PowerPC and x86. */ 38 39/* One of Darwin's NeXT legacies is the Mach-O format, which is partly 40 like a.out and partly like COFF, with additional features like 41 multi-architecture binary support. */ 42 43#define DARWIN_X86 0 44#define DARWIN_PPC 0 45 46/* Don't assume anything about the header files. */ 47#define NO_IMPLICIT_EXTERN_C 48 49/* Suppress g++ attempt to link in the math library automatically. */ 50#define MATH_LIBRARY "" 51 52/* We have atexit. */ 53 54#define HAVE_ATEXIT 55 56/* Define an empty body for the function do_global_dtors() in libgcc2.c. */ 57 58#define DO_GLOBAL_DTORS_BODY 59 60/* The string value for __SIZE_TYPE__. */ 61 62#ifndef SIZE_TYPE 63#define SIZE_TYPE "long unsigned int" 64#endif 65 66/* Type used for ptrdiff_t, as a string used in a declaration. */ 67 68#undef PTRDIFF_TYPE 69#define PTRDIFF_TYPE "int" 70 71/* wchar_t is int. */ 72 73#undef WCHAR_TYPE 74#define WCHAR_TYPE "int" 75#undef WCHAR_TYPE_SIZE 76#define WCHAR_TYPE_SIZE 32 77 78#define INT8_TYPE "signed char" 79#define INT16_TYPE "short int" 80#define INT32_TYPE "int" 81#define INT64_TYPE "long long int" 82#define UINT8_TYPE "unsigned char" 83#define UINT16_TYPE "short unsigned int" 84#define UINT32_TYPE "unsigned int" 85#define UINT64_TYPE "long long unsigned int" 86 87#define INT_LEAST8_TYPE "signed char" 88#define INT_LEAST16_TYPE "short int" 89#define INT_LEAST32_TYPE "int" 90#define INT_LEAST64_TYPE "long long int" 91#define UINT_LEAST8_TYPE "unsigned char" 92#define UINT_LEAST16_TYPE "short unsigned int" 93#define UINT_LEAST32_TYPE "unsigned int" 94#define UINT_LEAST64_TYPE "long long unsigned int" 95 96#define INT_FAST8_TYPE "signed char" 97#define INT_FAST16_TYPE "short int" 98#define INT_FAST32_TYPE "int" 99#define INT_FAST64_TYPE "long long int" 100#define UINT_FAST8_TYPE "unsigned char" 101#define UINT_FAST16_TYPE "short unsigned int" 102#define UINT_FAST32_TYPE "unsigned int" 103#define UINT_FAST64_TYPE "long long unsigned int" 104 105#define INTPTR_TYPE "long int" 106#define UINTPTR_TYPE "long unsigned int" 107 108#define SIG_ATOMIC_TYPE "int" 109 110/* Default to using the NeXT-style runtime, since that's what is 111 pre-installed on Darwin systems. */ 112 113#define NEXT_OBJC_RUNTIME 1 114 115/* Don't default to pcc-struct-return, because gcc is the only compiler, and 116 we want to retain compatibility with older gcc versions. */ 117 118#undef DEFAULT_PCC_STRUCT_RETURN 119#define DEFAULT_PCC_STRUCT_RETURN 0 120 121/* True if pragma ms_struct is in effect. */ 122extern GTY(()) int darwin_ms_struct; 123 124#define DRIVER_SELF_SPECS \ 125 "%{gfull:-g -fno-eliminate-unused-debug-symbols} %<gfull", \ 126 "%{gused:-g -feliminate-unused-debug-symbols} %<gused", \ 127 "%{fapple-kext|mkernel:-static}", \ 128 "%{shared:-Zdynamiclib} %<shared" 129 130#define DARWIN_CC1_SPEC \ 131 "%{findirect-virtual-calls: -fapple-kext} %<findirect-virtual-calls " \ 132 "%{fterminated-vtables: -fapple-kext} %<fterminated-vtables " \ 133 "%<filelist* %<framework*" 134 135#define SUBSUBTARGET_OVERRIDE_OPTIONS \ 136 do { \ 137 darwin_override_options (); \ 138 } while (0) 139 140#define SUBTARGET_C_COMMON_OVERRIDE_OPTIONS do { \ 141 if (flag_mkernel || flag_apple_kext) \ 142 { \ 143 if (flag_use_cxa_atexit == 2) \ 144 flag_use_cxa_atexit = 0; \ 145 /* kexts should always be built without the coalesced sections \ 146 because the kernel loader doesn't grok such sections. */ \ 147 flag_weak = 0; \ 148 /* No RTTI in kexts. */ \ 149 flag_rtti = 0; \ 150 } \ 151 } while (0) 152 153/* Machine dependent cpp options. Don't add more options here, add 154 them to darwin_cpp_builtins in darwin-c.c. */ 155 156#undef CPP_SPEC 157#define CPP_SPEC "%{static:%{!dynamic:-D__STATIC__}}%{!static:-D__DYNAMIC__}" \ 158 " %{pthread:-D_REENTRANT}" 159 160/* This is mostly a clone of the standard LINK_COMMAND_SPEC, plus 161 precomp, libtool, and fat build additions. 162 163 In general, random Darwin linker flags should go into LINK_SPEC 164 instead of LINK_COMMAND_SPEC. The command spec is better for 165 specifying the handling of options understood by generic Unix 166 linkers, and for positional arguments like libraries. */ 167 168#define LINK_COMMAND_SPEC_A \ 169 "%{!fdump=*:%{!fsyntax-only:%{!c:%{!M:%{!MM:%{!E:%{!S:\ 170 %(linker)" \ 171 LINK_PLUGIN_SPEC \ 172 "%{flto*:%<fcompare-debug*} \ 173 %{flto*} \ 174 %l " LINK_COMPRESS_DEBUG_SPEC \ 175 "%X %{s} %{t} %{Z} %{u*} \ 176 %{e*} %{r} \ 177 %{o*}%{!o:-o a.out} \ 178 %{!nostdlib:%{!nostartfiles:%S}} \ 179 %{L*} %(link_libgcc) %o %{fprofile-arcs|fprofile-generate*|coverage:-lgcov} \ 180 %{fopenacc|fopenmp|ftree-parallelize-loops=*: \ 181 %{static|static-libgcc|static-libstdc++|static-libgfortran: libgomp.a%s; : -lgomp } } \ 182 %{fgnu-tm: \ 183 %{static|static-libgcc|static-libstdc++|static-libgfortran: libitm.a%s; : -litm } } \ 184 %{!nostdlib:%{!nodefaultlibs:\ 185 %{%:sanitize(address): -lasan } \ 186 %{%:sanitize(undefined): -lubsan } \ 187 %(link_ssp) %(link_gcc_c_sequence)\ 188 }}\ 189 %{!nostdlib:%{!nostartfiles:%E}} %{T*} %{F*} }}}}}}}" 190 191#define DSYMUTIL "\ndsymutil" 192 193#define DSYMUTIL_SPEC \ 194 "%{!fdump=*:%{!fsyntax-only:%{!c:%{!M:%{!MM:%{!E:%{!S:\ 195 %{v} \ 196 %{gdwarf-2:%{!gstabs*:%{!g0: -idsym}}}\ 197 %{.c|.cc|.C|.cpp|.cp|.c++|.cxx|.CPP|.m|.mm: \ 198 %{gdwarf-2:%{!gstabs*:%{!g0: -dsym}}}}}}}}}}}" 199 200#define LINK_COMMAND_SPEC LINK_COMMAND_SPEC_A DSYMUTIL_SPEC 201 202/* Tell collect2 to run dsymutil for us as necessary. */ 203#define COLLECT_RUN_DSYMUTIL 1 204 205/* We only want one instance of %G, since libSystem (Darwin's -lc) does not depend 206 on libgcc. */ 207#undef LINK_GCC_C_SEQUENCE_SPEC 208#define LINK_GCC_C_SEQUENCE_SPEC "%G %L" 209 210#ifdef TARGET_SYSTEM_ROOT 211#define LINK_SYSROOT_SPEC \ 212 "%{isysroot*:-syslibroot %*;:-syslibroot " TARGET_SYSTEM_ROOT "}" 213#else 214#define LINK_SYSROOT_SPEC "%{isysroot*:-syslibroot %*}" 215#endif 216 217#define PIE_SPEC "%{fpie|pie|fPIE:}" 218 219/* Please keep the random linker options in alphabetical order (modulo 220 'Z' and 'no' prefixes). Note that options taking arguments may appear 221 multiple times on a command line with different arguments each time, 222 so put a * after their names so all of them get passed. */ 223#define LINK_SPEC \ 224 "%{static}%{!static:-dynamic} \ 225 %:remove-outfile(-ldl) \ 226 %:remove-outfile(-lm) \ 227 %:remove-outfile(-lpthread) \ 228 %{fgnu-runtime: %{static|static-libgcc: \ 229 %:replace-outfile(-lobjc libobjc-gnu.a%s); \ 230 :%:replace-outfile(-lobjc -lobjc-gnu ) } }\ 231 %{static|static-libgcc|static-libgfortran:%:replace-outfile(-lgfortran libgfortran.a%s)}\ 232 %{static|static-libgcc|static-libstdc++|static-libgfortran:%:replace-outfile(-lgomp libgomp.a%s)}\ 233 %{static|static-libgcc|static-libstdc++:%:replace-outfile(-lstdc++ libstdc++.a%s)}\ 234 %{!Zdynamiclib: \ 235 %{Zforce_cpusubtype_ALL:-arch %(darwin_arch) -force_cpusubtype_ALL} \ 236 %{!Zforce_cpusubtype_ALL:-arch %(darwin_subarch)} \ 237 %{Zbundle:-bundle} \ 238 %{Zbundle_loader*:-bundle_loader %*} \ 239 %{client_name*} \ 240 %{compatibility_version*:%e-compatibility_version only allowed with -dynamiclib\ 241} \ 242 %{current_version*:%e-current_version only allowed with -dynamiclib} \ 243 %{Zforce_flat_namespace:-force_flat_namespace} \ 244 %{Zinstall_name*:%e-install_name only allowed with -dynamiclib} \ 245 %{keep_private_externs} \ 246 %{private_bundle} \ 247 } \ 248 %{Zdynamiclib: -dylib \ 249 %{Zbundle:%e-bundle not allowed with -dynamiclib} \ 250 %{Zbundle_loader*:%e-bundle_loader not allowed with -dynamiclib} \ 251 %{client_name*:%e-client_name not allowed with -dynamiclib} \ 252 %{compatibility_version*:-dylib_compatibility_version %*} \ 253 %{current_version*:-dylib_current_version %*} \ 254 %{Zforce_cpusubtype_ALL:-arch %(darwin_arch)} \ 255 %{!Zforce_cpusubtype_ALL: -arch %(darwin_subarch)} \ 256 %{Zforce_flat_namespace:%e-force_flat_namespace not allowed with -dynamiclib} \ 257 %{Zinstall_name*:-dylib_install_name %*} \ 258 %{keep_private_externs:%e-keep_private_externs not allowed with -dynamiclib} \ 259 %{private_bundle:%e-private_bundle not allowed with -dynamiclib} \ 260 } \ 261 %{Zall_load:-all_load} \ 262 %{Zallowable_client*:-allowable_client %*} \ 263 %{Zbind_at_load:-bind_at_load} \ 264 %{Zarch_errors_fatal:-arch_errors_fatal} \ 265 %{Zdead_strip:-dead_strip} \ 266 %{Zno_dead_strip_inits_and_terms:-no_dead_strip_inits_and_terms} \ 267 %{Zdylib_file*:-dylib_file %*} \ 268 %{Zdynamic:-dynamic}\ 269 %{Zexported_symbols_list*:-exported_symbols_list %*} \ 270 %{Zflat_namespace:-flat_namespace} \ 271 %{headerpad_max_install_names} \ 272 %{Zimage_base*:-image_base %*} \ 273 %{Zinit*:-init %*} \ 274 %{!mmacosx-version-min=*:-macosx_version_min %(darwin_minversion)} \ 275 %{mmacosx-version-min=*:-macosx_version_min %*} \ 276 %{nomultidefs} \ 277 %{Zmulti_module:-multi_module} %{Zsingle_module:-single_module} \ 278 %{Zmultiply_defined*:-multiply_defined %*} \ 279 %{!Zmultiply_defined*:%{shared-libgcc: \ 280 %:version-compare(< 10.5 mmacosx-version-min= -multiply_defined) \ 281 %:version-compare(< 10.5 mmacosx-version-min= suppress)}} \ 282 %{Zmultiplydefinedunused*:-multiply_defined_unused %*} \ 283 " PIE_SPEC " \ 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 %{Zfn_seg_addr_table_filename*:-seg_addr_table_filename %*} \ 292 %{sub_library*} %{sub_umbrella*} \ 293 " LINK_SYSROOT_SPEC " \ 294 %{twolevel_namespace} %{twolevel_namespace_hints} \ 295 %{Zumbrella*: -umbrella %*} \ 296 %{undefined*} \ 297 %{Zunexported_symbols_list*:-unexported_symbols_list %*} \ 298 %{Zweak_reference_mismatches*:-weak_reference_mismatches %*} \ 299 %{!Zweak_reference_mismatches*:-weak_reference_mismatches non-weak} \ 300 %{X} \ 301 %{y*} \ 302 %{w} \ 303 %{pagezero_size*} %{segs_read_*} %{seglinkedit} %{noseglinkedit} \ 304 %{sectalign*} %{sectobjectsymbols*} %{segcreate*} %{whyload} \ 305 %{whatsloaded} %{dylinker_install_name*} \ 306 %{dylinker} %{Mach} " 307 308 309/* Machine dependent libraries. */ 310 311#define LIB_SPEC "%{!static:-lSystem}" 312 313/* Support -mmacosx-version-min by supplying different (stub) libgcc_s.dylib 314 libraries to link against, and by not linking against libgcc_s on 315 earlier-than-10.3.9. 316 317 Note that by default, -lgcc_eh is not linked against! This is 318 because in a future version of Darwin the EH frame information may 319 be in a new format, or the fallback routine might be changed; if 320 you want to explicitly link against the static version of those 321 routines, because you know you don't need to unwind through system 322 libraries, you need to explicitly say -static-libgcc. 323 324 If it is linked against, it has to be before -lgcc, because it may 325 need symbols from -lgcc. */ 326#undef REAL_LIBGCC_SPEC 327#define REAL_LIBGCC_SPEC \ 328 "%{static-libgcc|static: -lgcc_eh -lgcc; \ 329 shared-libgcc|fexceptions|fgnu-runtime: \ 330 %:version-compare(!> 10.5 mmacosx-version-min= -lgcc_s.10.4) \ 331 %:version-compare(>< 10.5 10.6 mmacosx-version-min= -lgcc_s.10.5) \ 332 %:version-compare(!> 10.5 mmacosx-version-min= -lgcc_ext.10.4) \ 333 %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_ext.10.5) \ 334 -lgcc ; \ 335 :%:version-compare(>< 10.3.9 10.5 mmacosx-version-min= -lgcc_s.10.4) \ 336 %:version-compare(>< 10.5 10.6 mmacosx-version-min= -lgcc_s.10.5) \ 337 %:version-compare(!> 10.5 mmacosx-version-min= -lgcc_ext.10.4) \ 338 %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_ext.10.5) \ 339 -lgcc }" 340 341/* We specify crt0.o as -lcrt0.o so that ld will search the library path. 342 343 crt3.o provides __cxa_atexit on systems that don't have it. Since 344 it's only used with C++, which requires passing -shared-libgcc, key 345 off that to avoid unnecessarily adding a destructor to every 346 powerpc program built. */ 347 348#undef STARTFILE_SPEC 349#define STARTFILE_SPEC \ 350 "%{Zdynamiclib: %(darwin_dylib1) %{fgnu-tm: -lcrttms.o}} \ 351 %{!Zdynamiclib:%{Zbundle:%{!static: \ 352 %:version-compare(< 10.6 mmacosx-version-min= -lbundle1.o) \ 353 %{fgnu-tm: -lcrttms.o}}} \ 354 %{!Zbundle:%{pg:%{static:-lgcrt0.o} \ 355 %{!static:%{object:-lgcrt0.o} \ 356 %{!object:%{preload:-lgcrt0.o} \ 357 %{!preload:-lgcrt1.o \ 358 %:version-compare(>= 10.8 mmacosx-version-min= -no_new_main) \ 359 %(darwin_crt2)}}}} \ 360 %{!pg:%{static:-lcrt0.o} \ 361 %{!static:%{object:-lcrt0.o} \ 362 %{!object:%{preload:-lcrt0.o} \ 363 %{!preload: %(darwin_crt1) \ 364 %(darwin_crt2)}}}}}} \ 365 %{shared-libgcc:%:version-compare(< 10.5 mmacosx-version-min= crt3.o%s)}" 366 367/* We want a destructor last in the list. */ 368#define TM_DESTRUCTOR "%{fgnu-tm: -lcrttme.o}" 369#define ENDFILE_SPEC TM_DESTRUCTOR 370 371#define DARWIN_EXTRA_SPECS \ 372 { "darwin_crt1", DARWIN_CRT1_SPEC }, \ 373 { "darwin_dylib1", DARWIN_DYLIB1_SPEC }, \ 374 { "darwin_minversion", DARWIN_MINVERSION_SPEC }, 375 376#define DARWIN_DYLIB1_SPEC \ 377 "%:version-compare(!> 10.5 mmacosx-version-min= -ldylib1.o) \ 378 %:version-compare(>< 10.5 10.6 mmacosx-version-min= -ldylib1.10.5.o)" 379 380#define DARWIN_CRT1_SPEC \ 381 "%:version-compare(!> 10.5 mmacosx-version-min= -lcrt1.o) \ 382 %:version-compare(>< 10.5 10.6 mmacosx-version-min= -lcrt1.10.5.o) \ 383 %:version-compare(>< 10.6 10.8 mmacosx-version-min= -lcrt1.10.6.o) \ 384 %{fgnu-tm: -lcrttms.o}" 385 386/* Default Darwin ASM_SPEC, very simple. */ 387#define ASM_SPEC "-arch %(darwin_arch) \ 388 %{Zforce_cpusubtype_ALL:-force_cpusubtype_ALL} \ 389 %{static}" 390 391/* Default ASM_DEBUG_SPEC. Darwin's as cannot currently produce dwarf 392 debugging data. */ 393 394#define ASM_DEBUG_SPEC "%{g*:%{!g0:%{!gdwarf*:--gstabs}}}" 395 396/* We still allow output of STABS if the assembler supports it. */ 397#ifdef HAVE_AS_STABS_DIRECTIVE 398#define DBX_DEBUGGING_INFO 1 399#define PREFERRED_DEBUGGING_TYPE DBX_DEBUG 400#endif 401 402#define DWARF2_DEBUGGING_INFO 1 403 404#define DEBUG_FRAME_SECTION "__DWARF,__debug_frame,regular,debug" 405#define DEBUG_INFO_SECTION "__DWARF,__debug_info,regular,debug" 406#define DEBUG_ABBREV_SECTION "__DWARF,__debug_abbrev,regular,debug" 407#define DEBUG_ARANGES_SECTION "__DWARF,__debug_aranges,regular,debug" 408#define DEBUG_MACINFO_SECTION "__DWARF,__debug_macinfo,regular,debug" 409#define DEBUG_LINE_SECTION "__DWARF,__debug_line,regular,debug" 410#define DEBUG_LOC_SECTION "__DWARF,__debug_loc,regular,debug" 411#define DEBUG_PUBNAMES_SECTION "__DWARF,__debug_pubnames,regular,debug" 412#define DEBUG_PUBTYPES_SECTION "__DWARF,__debug_pubtypes,regular,debug" 413#define DEBUG_STR_SECTION "__DWARF,__debug_str,regular,debug" 414#define DEBUG_RANGES_SECTION "__DWARF,__debug_ranges,regular,debug" 415#define DEBUG_MACRO_SECTION "__DWARF,__debug_macro,regular,debug" 416 417#define TARGET_WANT_DEBUG_PUB_SECTIONS true 418 419#define TARGET_FORCE_AT_COMP_DIR true 420 421/* When generating stabs debugging, use N_BINCL entries. */ 422 423#define DBX_USE_BINCL 424 425/* There is no limit to the length of stabs strings. */ 426 427#define DBX_CONTIN_LENGTH 0 428 429/* gdb needs a null N_SO at the end of each file for scattered loading. */ 430 431#define DBX_OUTPUT_NULL_N_SO_AT_MAIN_SOURCE_FILE_END 432 433/* GCC's definition of 'one_only' is the same as its definition of 'weak'. */ 434#define MAKE_DECL_ONE_ONLY(DECL) (DECL_WEAK (DECL) = 1) 435 436/* Mach-O supports 'weak imports', and 'weak definitions' in coalesced 437 sections. machopic_select_section ensures that weak variables go in 438 coalesced sections. Weak aliases (or any other kind of aliases) are 439 not supported. Weak symbols that aren't visible outside the .s file 440 are not supported. */ 441#define ASM_WEAKEN_DECL(FILE, DECL, NAME, ALIAS) \ 442 do { \ 443 if (ALIAS) \ 444 { \ 445 warning (0, "alias definitions not supported in Mach-O; ignored"); \ 446 break; \ 447 } \ 448 \ 449 if (! DECL_EXTERNAL (DECL) && TREE_PUBLIC (DECL)) \ 450 targetm.asm_out.globalize_label (FILE, NAME); \ 451 if (DECL_EXTERNAL (DECL)) \ 452 fputs ("\t.weak_reference ", FILE); \ 453 else if (lookup_attribute ("weak_import", DECL_ATTRIBUTES (DECL))) \ 454 break; \ 455 else if (TREE_PUBLIC (DECL)) \ 456 fputs ("\t.weak_definition ", FILE); \ 457 else \ 458 break; \ 459 assemble_name (FILE, NAME); \ 460 fputc ('\n', FILE); \ 461 } while (0) 462 463/* Darwin has the pthread routines in libSystem, which every program 464 links to, so there's no need for weak-ness for that. */ 465#define GTHREAD_USE_WEAK 0 466 467/* The Darwin linker doesn't want coalesced symbols to appear in 468 a static archive's table of contents. */ 469#undef TARGET_WEAK_NOT_IN_ARCHIVE_TOC 470#define TARGET_WEAK_NOT_IN_ARCHIVE_TOC 1 471 472/* On Darwin, we don't (at the time of writing) have linkonce sections 473 with names, so it's safe to make the class data not comdat. */ 474#define TARGET_CXX_CLASS_DATA_ALWAYS_COMDAT hook_bool_void_false 475 476/* For efficiency, on Darwin the RTTI information that is always 477 emitted in the standard C++ library should not be COMDAT. */ 478#define TARGET_CXX_LIBRARY_RTTI_COMDAT hook_bool_void_false 479 480/* We make exception information linkonce. */ 481#undef TARGET_USES_WEAK_UNWIND_INFO 482#define TARGET_USES_WEAK_UNWIND_INFO 1 483 484/* We need to use a nonlocal label for the start of an EH frame: the 485 Darwin linker requires that a coalesced section start with a label. 486 Unfortunately, it also requires that 'debug' sections don't contain 487 labels. */ 488#undef FRAME_BEGIN_LABEL 489#define FRAME_BEGIN_LABEL (for_eh ? "EH_frame" : "Lframe") 490 491/* Emit a label for the FDE corresponding to DECL. EMPTY means 492 emit a label for an empty FDE. */ 493#define TARGET_ASM_EMIT_UNWIND_LABEL darwin_emit_unwind_label 494 495/* Emit a label to separate the exception table. */ 496#define TARGET_ASM_EMIT_EXCEPT_TABLE_LABEL darwin_emit_except_table_label 497 498/* Our profiling scheme doesn't LP labels and counter words. */ 499 500#define NO_PROFILE_COUNTERS 1 501 502#undef INIT_SECTION_ASM_OP 503#define INIT_SECTION_ASM_OP "" 504 505#undef INVOKE__main 506 507#define TARGET_ASM_CONSTRUCTOR machopic_asm_out_constructor 508#define TARGET_ASM_DESTRUCTOR machopic_asm_out_destructor 509 510/* Always prefix with an underscore. */ 511 512#define USER_LABEL_PREFIX "_" 513 514/* A dummy symbol that will be replaced with the function base name. */ 515#define MACHOPIC_FUNCTION_BASE_NAME "<pic base>" 516 517/* Don't output a .file directive. That is only used by the assembler for 518 error reporting. */ 519#undef TARGET_ASM_FILE_START_FILE_DIRECTIVE 520#define TARGET_ASM_FILE_START_FILE_DIRECTIVE false 521 522#undef TARGET_ASM_FILE_END 523#define TARGET_ASM_FILE_END darwin_file_end 524 525/* Because Mach-O relocations have a counter from 1 to 255 for the 526 section number they apply to, it is necessary to output all 527 normal sections before the LTO sections, to make sure that the 528 sections that may have relocations always have a section number 529 smaller than 255. */ 530#undef TARGET_ASM_LTO_START 531#define TARGET_ASM_LTO_START darwin_asm_lto_start 532#undef TARGET_ASM_LTO_END 533#define TARGET_ASM_LTO_END darwin_asm_lto_end 534 535#define ASM_OUTPUT_SKIP(FILE,SIZE) \ 536 fprintf (FILE, "\t.space "HOST_WIDE_INT_PRINT_UNSIGNED"\n", SIZE) 537 538/* Give ObjC methods pretty symbol names. */ 539 540#undef OBJC_GEN_METHOD_LABEL 541#define OBJC_GEN_METHOD_LABEL(BUF,IS_INST,CLASS_NAME,CAT_NAME,SEL_NAME,NUM) \ 542 do { if (CAT_NAME) \ 543 sprintf (BUF, "%c[%s(%s) %s]", (IS_INST) ? '-' : '+', \ 544 (CLASS_NAME), (CAT_NAME), (SEL_NAME)); \ 545 else \ 546 sprintf (BUF, "%c[%s %s]", (IS_INST) ? '-' : '+', \ 547 (CLASS_NAME), (SEL_NAME)); \ 548 } while (0) 549 550#undef ASM_DECLARE_OBJECT_NAME 551#define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL) \ 552 darwin_asm_declare_object_name ((FILE), (NAME), (DECL)) 553 554/* The RTTI data (e.g., __ti4name) is common and public (and static), 555 but it does need to be referenced via indirect PIC data pointers. 556 The machopic_define_symbol calls are telling the machopic subsystem 557 that the name *is* defined in this module, so it doesn't need to 558 make them indirect. */ 559 560#define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \ 561 do { \ 562 const char *xname = NAME; \ 563 if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF) \ 564 xname = IDENTIFIER_POINTER (DECL_NAME (DECL)); \ 565 if (! DECL_WEAK (DECL) \ 566 && ((TREE_STATIC (DECL) \ 567 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \ 568 || DECL_INITIAL (DECL))) \ 569 machopic_define_symbol (DECL_RTL (DECL)); \ 570 if ((TREE_STATIC (DECL) \ 571 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \ 572 || DECL_INITIAL (DECL)) \ 573 (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false); \ 574 ASM_OUTPUT_FUNCTION_LABEL (FILE, xname, DECL); \ 575 } while (0) 576 577#undef TARGET_ASM_DECLARE_CONSTANT_NAME 578#define TARGET_ASM_DECLARE_CONSTANT_NAME darwin_asm_declare_constant_name 579 580/* Wrap new method names in quotes so the assembler doesn't gag. 581 Make Objective-C internal symbols local and in doing this, we need 582 to accommodate the name mangling done by c++ on file scope locals. */ 583 584int darwin_label_is_anonymous_local_objc_name (const char *name); 585 586#undef ASM_OUTPUT_LABELREF 587#define ASM_OUTPUT_LABELREF(FILE,NAME) \ 588 do { \ 589 const char *xname = (NAME); \ 590 if (! strcmp (xname, MACHOPIC_FUNCTION_BASE_NAME)) \ 591 machopic_output_function_base_name(FILE); \ 592 else if (xname[0] == '&' || xname[0] == '*') \ 593 { \ 594 int len = strlen (xname); \ 595 if (len > 6 && !strcmp ("$stub", xname + len - 5)) \ 596 machopic_validate_stub_or_non_lazy_ptr (xname); \ 597 else if (len > 7 && !strcmp ("$stub\"", xname + len - 6)) \ 598 machopic_validate_stub_or_non_lazy_ptr (xname); \ 599 else if (len > 14 && !strcmp ("$non_lazy_ptr", xname + len - 13)) \ 600 machopic_validate_stub_or_non_lazy_ptr (xname); \ 601 else if (len > 15 && !strcmp ("$non_lazy_ptr\"", xname + len - 14)) \ 602 machopic_validate_stub_or_non_lazy_ptr (xname); \ 603 if (xname[1] != '"' && name_needs_quotes (&xname[1])) \ 604 fprintf (FILE, "\"%s\"", &xname[1]); \ 605 else \ 606 fputs (&xname[1], FILE); \ 607 } \ 608 else if (xname[0] == '+' || xname[0] == '-') \ 609 fprintf (FILE, "\"%s\"", xname); \ 610 else if (darwin_label_is_anonymous_local_objc_name (xname)) \ 611 fprintf (FILE, "L%s", xname); \ 612 else if (xname[0] != '"' && name_needs_quotes (xname)) \ 613 asm_fprintf (FILE, "\"%U%s\"", xname); \ 614 else \ 615 asm_fprintf (FILE, "%U%s", xname); \ 616 } while (0) 617 618/* Output before executable code. */ 619#undef TEXT_SECTION_ASM_OP 620#define TEXT_SECTION_ASM_OP "\t.text" 621 622/* Output before writable data. */ 623 624#undef DATA_SECTION_ASM_OP 625#define DATA_SECTION_ASM_OP "\t.data" 626 627#undef ALIGN_ASM_OP 628#define ALIGN_ASM_OP ".align" 629 630#undef ASM_OUTPUT_ALIGN 631#define ASM_OUTPUT_ALIGN(FILE,LOG) \ 632 if ((LOG) != 0) \ 633 fprintf (FILE, "\t%s\t%d\n", ALIGN_ASM_OP, (LOG)) 634 635/* The maximum alignment which the object file format can support in 636 bits. For Mach-O, this is 2^15 bytes. */ 637 638#undef MAX_OFILE_ALIGNMENT 639#define MAX_OFILE_ALIGNMENT (0x8000 * 8) 640 641#define L2_MAX_OFILE_ALIGNMENT 15 642 643/* These are the three variants that emit referenced blank space. */ 644#define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \ 645 darwin_output_aligned_bss ((FILE), (DECL), (NAME), (SIZE), (ALIGN)) 646 647#undef ASM_OUTPUT_ALIGNED_DECL_LOCAL 648#define ASM_OUTPUT_ALIGNED_DECL_LOCAL(FILE, DECL, NAME, SIZE, ALIGN) \ 649 darwin_asm_output_aligned_decl_local \ 650 ((FILE), (DECL), (NAME), (SIZE), (ALIGN)) 651 652#undef ASM_OUTPUT_ALIGNED_DECL_COMMON 653#define ASM_OUTPUT_ALIGNED_DECL_COMMON(FILE, DECL, NAME, SIZE, ALIGN) \ 654 darwin_asm_output_aligned_decl_common \ 655 ((FILE), (DECL), (NAME), (SIZE), (ALIGN)) 656 657/* The generic version, archs should over-ride where required. */ 658#define MACHOPIC_NL_SYMBOL_PTR_SECTION ".non_lazy_symbol_pointer" 659 660/* Declare the section variables. */ 661#ifndef USED_FOR_TARGET 662enum darwin_section_enum { 663#define DEF_SECTION(NAME, FLAGS, DIRECTIVE, OBJC) NAME, 664#include "darwin-sections.def" 665#undef DEF_SECTION 666 NUM_DARWIN_SECTIONS 667}; 668extern GTY(()) section * darwin_sections[NUM_DARWIN_SECTIONS]; 669#endif 670 671#undef TARGET_ASM_SELECT_SECTION 672#define TARGET_ASM_SELECT_SECTION machopic_select_section 673 674#undef TARGET_ASM_FUNCTION_SECTION 675#define TARGET_ASM_FUNCTION_SECTION darwin_function_section 676 677#undef TARGET_ASM_FUNCTION_SWITCHED_TEXT_SECTIONS 678#define TARGET_ASM_FUNCTION_SWITCHED_TEXT_SECTIONS \ 679 darwin_function_switched_text_sections 680 681#undef TARGET_ASM_SELECT_RTX_SECTION 682#define TARGET_ASM_SELECT_RTX_SECTION machopic_select_rtx_section 683#undef TARGET_ASM_UNIQUE_SECTION 684#define TARGET_ASM_UNIQUE_SECTION darwin_unique_section 685#undef TARGET_ASM_FUNCTION_RODATA_SECTION 686#define TARGET_ASM_FUNCTION_RODATA_SECTION default_no_function_rodata_section 687 688#undef TARGET_ASM_TM_CLONE_TABLE_SECTION 689#define TARGET_ASM_TM_CLONE_TABLE_SECTION darwin_tm_clone_table_section 690 691#undef TARGET_ASM_RELOC_RW_MASK 692#define TARGET_ASM_RELOC_RW_MASK machopic_reloc_rw_mask 693 694/* Globalizing directive for a label. */ 695#define GLOBAL_ASM_OP "\t.globl " 696#define TARGET_ASM_GLOBALIZE_LABEL darwin_globalize_label 697 698/* Emit an assembler directive to set visibility for a symbol. Used 699 to support visibility attribute and Darwin's private extern 700 feature. */ 701#undef TARGET_ASM_ASSEMBLE_VISIBILITY 702#define TARGET_ASM_ASSEMBLE_VISIBILITY darwin_assemble_visibility 703 704/* Extra attributes for Darwin. */ 705#define SUBTARGET_ATTRIBUTE_TABLE \ 706 /* { name, min_len, max_len, decl_req, type_req, fn_type_req, handler, \ 707 affects_type_identity } */ \ 708 { "apple_kext_compatibility", 0, 0, false, true, false, \ 709 darwin_handle_kext_attribute, false }, \ 710 { "weak_import", 0, 0, true, false, false, \ 711 darwin_handle_weak_import_attribute, false } 712 713#undef ASM_GENERATE_INTERNAL_LABEL 714#define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM) \ 715 sprintf (LABEL, "*%s%ld", PREFIX, (long)(NUM)) 716 717#undef TARGET_ASM_MARK_DECL_PRESERVED 718#define TARGET_ASM_MARK_DECL_PRESERVED darwin_mark_decl_preserved 719 720/* Set on a symbol with SYMBOL_FLAG_FUNCTION or 721 MACHO_SYMBOL_FLAG_VARIABLE to indicate that the function or 722 variable has been defined in this translation unit. 723 When porting Mach-O to new architectures you need to make 724 sure these aren't clobbered by the backend. */ 725 726#define MACHO_SYMBOL_FLAG_VARIABLE (SYMBOL_FLAG_MACH_DEP) 727#define MACHO_SYMBOL_FLAG_DEFINED ((SYMBOL_FLAG_MACH_DEP) << 1) 728 729/* Set on a symbol to indicate when fix-and-continue style code 730 generation is being used and the symbol refers to a static symbol 731 that should be rebound from new instances of a translation unit to 732 the original instance of the data. */ 733 734#define MACHO_SYMBOL_STATIC ((SYMBOL_FLAG_MACH_DEP) << 2) 735 736/* Symbolic names for various things we might know about a symbol. */ 737 738enum machopic_addr_class { 739 MACHOPIC_UNDEFINED, 740 MACHOPIC_DEFINED_DATA, 741 MACHOPIC_UNDEFINED_DATA, 742 MACHOPIC_DEFINED_FUNCTION, 743 MACHOPIC_UNDEFINED_FUNCTION 744}; 745 746/* Macros defining the various PIC cases. */ 747 748#undef MACHO_DYNAMIC_NO_PIC_P 749#define MACHO_DYNAMIC_NO_PIC_P (TARGET_MACHO_DYNAMIC_NO_PIC) 750#undef MACHOPIC_INDIRECT 751#define MACHOPIC_INDIRECT (flag_pic || MACHO_DYNAMIC_NO_PIC_P) 752#define MACHOPIC_JUST_INDIRECT (MACHO_DYNAMIC_NO_PIC_P) 753#undef MACHOPIC_PURE 754#define MACHOPIC_PURE (flag_pic && ! MACHO_DYNAMIC_NO_PIC_P) 755 756#undef TARGET_ENCODE_SECTION_INFO 757#define TARGET_ENCODE_SECTION_INFO darwin_encode_section_info 758#undef TARGET_STRIP_NAME_ENCODING 759#define TARGET_STRIP_NAME_ENCODING default_strip_name_encoding 760 761#define GEN_BINDER_NAME_FOR_STUB(BUF,STUB,STUB_LENGTH) \ 762 do { \ 763 const char *const stub_ = (STUB); \ 764 char *buffer_ = (BUF); \ 765 strcpy (buffer_, stub_); \ 766 if (stub_[0] == '"') \ 767 { \ 768 strcpy (buffer_ + (STUB_LENGTH) - 1, "_binder\""); \ 769 } \ 770 else \ 771 { \ 772 strcpy (buffer_ + (STUB_LENGTH), "_binder"); \ 773 } \ 774 } while (0) 775 776#define GEN_SYMBOL_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH) \ 777 do { \ 778 const char *const symbol_ = (SYMBOL); \ 779 char *buffer_ = (BUF); \ 780 if (name_needs_quotes (symbol_) && symbol_[0] != '"') \ 781 { \ 782 sprintf (buffer_, "\"%s\"", symbol_); \ 783 } \ 784 else \ 785 { \ 786 strcpy (buffer_, symbol_); \ 787 } \ 788 } while (0) 789 790/* Given a symbol name string, create the lazy pointer version 791 of the symbol name. */ 792 793#define GEN_LAZY_PTR_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH) \ 794 do { \ 795 const char *symbol_ = (SYMBOL); \ 796 char *buffer_ = (BUF); \ 797 if (symbol_[0] == '"') \ 798 { \ 799 strcpy (buffer_, "\"L"); \ 800 strcpy (buffer_ + 2, symbol_ + 1); \ 801 strcpy (buffer_ + (SYMBOL_LENGTH), "$lazy_ptr\""); \ 802 } \ 803 else if (name_needs_quotes (symbol_)) \ 804 { \ 805 strcpy (buffer_, "\"L"); \ 806 strcpy (buffer_ + 2, symbol_); \ 807 strcpy (buffer_ + (SYMBOL_LENGTH) + 2, "$lazy_ptr\""); \ 808 } \ 809 else \ 810 { \ 811 strcpy (buffer_, "L"); \ 812 strcpy (buffer_ + 1, symbol_); \ 813 strcpy (buffer_ + (SYMBOL_LENGTH) + 1, "$lazy_ptr"); \ 814 } \ 815 } while (0) 816 817#define EH_FRAME_SECTION_NAME "__TEXT" 818#define EH_FRAME_SECTION_ATTR ",coalesced,no_toc+strip_static_syms+live_support" 819 820/* Java runtime class list. */ 821#define JCR_SECTION_NAME "__DATA,jcr,regular,no_dead_strip" 822 823#undef ASM_PREFERRED_EH_DATA_FORMAT 824#define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL) \ 825 (((CODE) == 2 && (GLOBAL) == 1) \ 826 ? (DW_EH_PE_pcrel | DW_EH_PE_indirect | DW_EH_PE_sdata4) : \ 827 ((CODE) == 1 || (GLOBAL) == 0) ? DW_EH_PE_pcrel : DW_EH_PE_absptr) 828 829#define ASM_OUTPUT_DWARF_DELTA(FILE,SIZE,LABEL1,LABEL2) \ 830 darwin_asm_output_dwarf_delta (FILE, SIZE, LABEL1, LABEL2) 831 832#define ASM_OUTPUT_DWARF_OFFSET(FILE,SIZE,LABEL,BASE) \ 833 darwin_asm_output_dwarf_offset (FILE, SIZE, LABEL, BASE) 834 835#define ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX(ASM_OUT_FILE, ENCODING, SIZE, ADDR, DONE) \ 836 if (ENCODING == ASM_PREFERRED_EH_DATA_FORMAT (2, 1)) { \ 837 darwin_non_lazy_pcrel (ASM_OUT_FILE, ADDR); \ 838 goto DONE; \ 839 } 840 841/* Experimentally, putting jump tables in text is faster on SPEC. 842 Also this is needed for correctness for coalesced functions. */ 843 844#ifndef JUMP_TABLES_IN_TEXT_SECTION 845#define JUMP_TABLES_IN_TEXT_SECTION 1 846#endif 847 848#define TARGET_TERMINATE_DW2_EH_FRAME_INFO false 849 850#define TARGET_ASM_INIT_SECTIONS darwin_init_sections 851#undef TARGET_ASM_NAMED_SECTION 852#define TARGET_ASM_NAMED_SECTION darwin_asm_named_section 853 854#define DARWIN_REGISTER_TARGET_PRAGMAS() \ 855 do { \ 856 if (!flag_preprocess_only) \ 857 cpp_register_pragma (parse_in, NULL, "mark", \ 858 darwin_pragma_ignore, false); \ 859 c_register_pragma (0, "options", darwin_pragma_options); \ 860 c_register_pragma (0, "segment", darwin_pragma_ignore); \ 861 c_register_pragma (0, "unused", darwin_pragma_unused); \ 862 c_register_pragma (0, "ms_struct", darwin_pragma_ms_struct); \ 863 } while (0) 864 865#undef ASM_APP_ON 866#define ASM_APP_ON "" 867#undef ASM_APP_OFF 868#define ASM_APP_OFF "" 869 870void darwin_register_frameworks (const char *, const char *, int); 871void darwin_register_objc_includes (const char *, const char *, int); 872#define TARGET_EXTRA_PRE_INCLUDES darwin_register_objc_includes 873#define TARGET_EXTRA_INCLUDES darwin_register_frameworks 874 875void add_framework_path (char *); 876#define TARGET_OPTF add_framework_path 877 878#define TARGET_POSIX_IO 879 880#define WINT_TYPE "int" 881 882/* Every program on darwin links against libSystem which contains the pthread 883 routines, so there's no need to explicitly call out when doing threaded 884 work. */ 885 886#undef GOMP_SELF_SPECS 887#define GOMP_SELF_SPECS "" 888#undef GTM_SELF_SPECS 889#define GTM_SELF_SPECS "" 890 891/* Darwin disables section anchors by default. 892 They should be enabled per arch where support exists in that arch. */ 893#define TARGET_ASM_OUTPUT_ANCHOR NULL 894#define DARWIN_SECTION_ANCHORS 0 895 896#define HAVE_ENABLE_EXECUTE_STACK 897 898/* For Apple KEXTs, we make the constructors return this to match gcc 899 2.95. */ 900#define TARGET_CXX_CDTOR_RETURNS_THIS (darwin_kextabi_p) 901#define TARGET_KEXTABI flag_apple_kext 902 903/* We have target-specific builtins. */ 904#define SUBTARGET_FOLD_BUILTIN darwin_fold_builtin 905 906#define TARGET_N_FORMAT_TYPES 1 907#define TARGET_FORMAT_TYPES darwin_additional_format_types 908 909#ifndef USED_FOR_TARGET 910extern void darwin_driver_init (unsigned int *,struct cl_decoded_option **); 911#define GCC_DRIVER_HOST_INITIALIZATION \ 912 darwin_driver_init (&decoded_options_count, &decoded_options) 913#endif 914 915/* The Apple assembler and linker do not support constructor priorities. */ 916#undef SUPPORTS_INIT_PRIORITY 917#define SUPPORTS_INIT_PRIORITY 0 918 919/* When building cross-compilers (and native crosses) we shall default to 920 providing an osx-version-min of this unless overridden by the User. */ 921#define DEF_MIN_OSX_VERSION "10.4" 922 923#endif /* CONFIG_DARWIN_H */ 924