1 /* Target definitions for Darwin (Mac OS X) systems. 2 Copyright (C) 1989-2014 Free Software Foundation, Inc. 3 Contributed by Apple Computer Inc. 4 5 This file is part of GCC. 6 7 GCC is free software; you can redistribute it and/or modify 8 it under the terms of the GNU General Public License as published by 9 the Free Software Foundation; either version 3, or (at your option) 10 any later version. 11 12 GCC is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 GNU General Public License for more details. 16 17 Under Section 7 of GPL version 3, you are granted additional 18 permissions described in the GCC Runtime Library Exception, version 19 3.1, as published by the Free Software Foundation. 20 21 You should have received a copy of the GNU General Public License and 22 a copy of the GCC Runtime Library Exception along with this program; 23 see 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. */ 122 extern 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 %X %{s} %{t} %{Z} %{u*} \ 175 %{e*} %{r} \ 176 %{o*}%{!o:-o a.out} \ 177 %{!nostdlib:%{!nostartfiles:%S}} \ 178 %{L*} %(link_libgcc) %o %{fprofile-arcs|fprofile-generate*|coverage:-lgcov} \ 179 %{fopenmp|ftree-parallelize-loops=*: \ 180 %{static|static-libgcc|static-libstdc++|static-libgfortran: libgomp.a%s; : -lgomp } } \ 181 %{fgnu-tm: \ 182 %{static|static-libgcc|static-libstdc++|static-libgfortran: libitm.a%s; : -litm } } \ 183 %{!nostdlib:%{!nodefaultlibs:\ 184 %{%:sanitize(address): -lasan } \ 185 %{%:sanitize(undefined): -lubsan } \ 186 %(link_ssp) %(link_gcc_c_sequence)\ 187 }}\ 188 %{!nostdlib:%{!nostartfiles:%E}} %{T*} %{F*} }}}}}}}" 189 190 #define DSYMUTIL "\ndsymutil" 191 192 #define DSYMUTIL_SPEC \ 193 "%{!fdump=*:%{!fsyntax-only:%{!c:%{!M:%{!MM:%{!E:%{!S:\ 194 %{v} \ 195 %{gdwarf-2:%{!gstabs*:%{!g0: -idsym}}}\ 196 %{.c|.cc|.C|.cpp|.cp|.c++|.cxx|.CPP|.m|.mm: \ 197 %{gdwarf-2:%{!gstabs*:%{!g0: -dsym}}}}}}}}}}}" 198 199 #define LINK_COMMAND_SPEC LINK_COMMAND_SPEC_A DSYMUTIL_SPEC 200 201 /* Tell collect2 to run dsymutil for us as necessary. */ 202 #define COLLECT_RUN_DSYMUTIL 1 203 204 /* We only want one instance of %G, since libSystem (Darwin's -lc) does not depend 205 on libgcc. */ 206 #undef LINK_GCC_C_SEQUENCE_SPEC 207 #define LINK_GCC_C_SEQUENCE_SPEC "%G %L" 208 209 #ifdef TARGET_SYSTEM_ROOT 210 #define LINK_SYSROOT_SPEC \ 211 "%{isysroot*:-syslibroot %*;:-syslibroot " TARGET_SYSTEM_ROOT "}" 212 #else 213 #define LINK_SYSROOT_SPEC "%{isysroot*:-syslibroot %*}" 214 #endif 215 216 #define PIE_SPEC "%{fpie|pie|fPIE:}" 217 218 /* Please keep the random linker options in alphabetical order (modulo 219 'Z' and 'no' prefixes). Note that options taking arguments may appear 220 multiple times on a command line with different arguments each time, 221 so put a * after their names so all of them get passed. */ 222 #define LINK_SPEC \ 223 "%{static}%{!static:-dynamic} \ 224 %:remove-outfile(-ldl) \ 225 %:remove-outfile(-lm) \ 226 %:remove-outfile(-lpthread) \ 227 %{fgnu-runtime: %{static|static-libgcc: \ 228 %:replace-outfile(-lobjc libobjc-gnu.a%s); \ 229 :%:replace-outfile(-lobjc -lobjc-gnu ) } }\ 230 %{static|static-libgcc|static-libgfortran:%:replace-outfile(-lgfortran libgfortran.a%s)}\ 231 %{static|static-libgcc|static-libstdc++|static-libgfortran:%:replace-outfile(-lgomp libgomp.a%s)}\ 232 %{static|static-libgcc|static-libstdc++:%:replace-outfile(-lstdc++ libstdc++.a%s)}\ 233 %{!Zdynamiclib: \ 234 %{Zforce_cpusubtype_ALL:-arch %(darwin_arch) -force_cpusubtype_ALL} \ 235 %{!Zforce_cpusubtype_ALL:-arch %(darwin_subarch)} \ 236 %{Zbundle:-bundle} \ 237 %{Zbundle_loader*:-bundle_loader %*} \ 238 %{client_name*} \ 239 %{compatibility_version*:%e-compatibility_version only allowed with -dynamiclib\ 240 } \ 241 %{current_version*:%e-current_version only allowed with -dynamiclib} \ 242 %{Zforce_flat_namespace:-force_flat_namespace} \ 243 %{Zinstall_name*:%e-install_name only allowed with -dynamiclib} \ 244 %{keep_private_externs} \ 245 %{private_bundle} \ 246 } \ 247 %{Zdynamiclib: -dylib \ 248 %{Zbundle:%e-bundle not allowed with -dynamiclib} \ 249 %{Zbundle_loader*:%e-bundle_loader not allowed with -dynamiclib} \ 250 %{client_name*:%e-client_name not allowed with -dynamiclib} \ 251 %{compatibility_version*:-dylib_compatibility_version %*} \ 252 %{current_version*:-dylib_current_version %*} \ 253 %{Zforce_cpusubtype_ALL:-arch %(darwin_arch)} \ 254 %{!Zforce_cpusubtype_ALL: -arch %(darwin_subarch)} \ 255 %{Zforce_flat_namespace:%e-force_flat_namespace not allowed with -dynamiclib} \ 256 %{Zinstall_name*:-dylib_install_name %*} \ 257 %{keep_private_externs:%e-keep_private_externs not allowed with -dynamiclib} \ 258 %{private_bundle:%e-private_bundle not allowed with -dynamiclib} \ 259 } \ 260 %{Zall_load:-all_load} \ 261 %{Zallowable_client*:-allowable_client %*} \ 262 %{Zbind_at_load:-bind_at_load} \ 263 %{Zarch_errors_fatal:-arch_errors_fatal} \ 264 %{Zdead_strip:-dead_strip} \ 265 %{Zno_dead_strip_inits_and_terms:-no_dead_strip_inits_and_terms} \ 266 %{Zdylib_file*:-dylib_file %*} \ 267 %{Zdynamic:-dynamic}\ 268 %{Zexported_symbols_list*:-exported_symbols_list %*} \ 269 %{Zflat_namespace:-flat_namespace} \ 270 %{headerpad_max_install_names} \ 271 %{Zimage_base*:-image_base %*} \ 272 %{Zinit*:-init %*} \ 273 %{!mmacosx-version-min=*:-macosx_version_min %(darwin_minversion)} \ 274 %{mmacosx-version-min=*:-macosx_version_min %*} \ 275 %{nomultidefs} \ 276 %{Zmulti_module:-multi_module} %{Zsingle_module:-single_module} \ 277 %{Zmultiply_defined*:-multiply_defined %*} \ 278 %{!Zmultiply_defined*:%{shared-libgcc: \ 279 %:version-compare(< 10.5 mmacosx-version-min= -multiply_defined) \ 280 %:version-compare(< 10.5 mmacosx-version-min= suppress)}} \ 281 %{Zmultiplydefinedunused*:-multiply_defined_unused %*} \ 282 " PIE_SPEC " \ 283 %{prebind} %{noprebind} %{nofixprebinding} %{prebind_all_twolevel_modules} \ 284 %{read_only_relocs} \ 285 %{sectcreate*} %{sectorder*} %{seg1addr*} %{segprot*} \ 286 %{Zsegaddr*:-segaddr %*} \ 287 %{Zsegs_read_only_addr*:-segs_read_only_addr %*} \ 288 %{Zsegs_read_write_addr*:-segs_read_write_addr %*} \ 289 %{Zseg_addr_table*: -seg_addr_table %*} \ 290 %{Zfn_seg_addr_table_filename*:-seg_addr_table_filename %*} \ 291 %{sub_library*} %{sub_umbrella*} \ 292 " LINK_SYSROOT_SPEC " \ 293 %{twolevel_namespace} %{twolevel_namespace_hints} \ 294 %{Zumbrella*: -umbrella %*} \ 295 %{undefined*} \ 296 %{Zunexported_symbols_list*:-unexported_symbols_list %*} \ 297 %{Zweak_reference_mismatches*:-weak_reference_mismatches %*} \ 298 %{!Zweak_reference_mismatches*:-weak_reference_mismatches non-weak} \ 299 %{X} \ 300 %{y*} \ 301 %{w} \ 302 %{pagezero_size*} %{segs_read_*} %{seglinkedit} %{noseglinkedit} \ 303 %{sectalign*} %{sectobjectsymbols*} %{segcreate*} %{whyload} \ 304 %{whatsloaded} %{dylinker_install_name*} \ 305 %{dylinker} %{Mach} " 306 307 308 /* Machine dependent libraries. */ 309 310 #define LIB_SPEC "%{!static:-lSystem}" 311 312 /* Support -mmacosx-version-min by supplying different (stub) libgcc_s.dylib 313 libraries to link against, and by not linking against libgcc_s on 314 earlier-than-10.3.9. 315 316 Note that by default, -lgcc_eh is not linked against! This is 317 because in a future version of Darwin the EH frame information may 318 be in a new format, or the fallback routine might be changed; if 319 you want to explicitly link against the static version of those 320 routines, because you know you don't need to unwind through system 321 libraries, you need to explicitly say -static-libgcc. 322 323 If it is linked against, it has to be before -lgcc, because it may 324 need symbols from -lgcc. */ 325 #undef REAL_LIBGCC_SPEC 326 #define REAL_LIBGCC_SPEC \ 327 "%{static-libgcc|static: -lgcc_eh -lgcc; \ 328 shared-libgcc|fexceptions|fgnu-runtime: \ 329 %:version-compare(!> 10.5 mmacosx-version-min= -lgcc_s.10.4) \ 330 %:version-compare(>< 10.5 10.6 mmacosx-version-min= -lgcc_s.10.5) \ 331 %:version-compare(!> 10.5 mmacosx-version-min= -lgcc_ext.10.4) \ 332 %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_ext.10.5) \ 333 -lgcc ; \ 334 :%:version-compare(>< 10.3.9 10.5 mmacosx-version-min= -lgcc_s.10.4) \ 335 %:version-compare(>< 10.5 10.6 mmacosx-version-min= -lgcc_s.10.5) \ 336 %:version-compare(!> 10.5 mmacosx-version-min= -lgcc_ext.10.4) \ 337 %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_ext.10.5) \ 338 -lgcc }" 339 340 /* We specify crt0.o as -lcrt0.o so that ld will search the library path. 341 342 crt3.o provides __cxa_atexit on systems that don't have it. Since 343 it's only used with C++, which requires passing -shared-libgcc, key 344 off that to avoid unnecessarily adding a destructor to every 345 powerpc program built. */ 346 347 #undef STARTFILE_SPEC 348 #define STARTFILE_SPEC \ 349 "%{Zdynamiclib: %(darwin_dylib1) %{fgnu-tm: -lcrttms.o}} \ 350 %{!Zdynamiclib:%{Zbundle:%{!static: \ 351 %:version-compare(< 10.6 mmacosx-version-min= -lbundle1.o) \ 352 %{fgnu-tm: -lcrttms.o}}} \ 353 %{!Zbundle:%{pg:%{static:-lgcrt0.o} \ 354 %{!static:%{object:-lgcrt0.o} \ 355 %{!object:%{preload:-lgcrt0.o} \ 356 %{!preload:-lgcrt1.o \ 357 %:version-compare(>= 10.8 mmacosx-version-min= -no_new_main) \ 358 %(darwin_crt2)}}}} \ 359 %{!pg:%{static:-lcrt0.o} \ 360 %{!static:%{object:-lcrt0.o} \ 361 %{!object:%{preload:-lcrt0.o} \ 362 %{!preload: %(darwin_crt1) \ 363 %(darwin_crt2)}}}}}} \ 364 %{shared-libgcc:%:version-compare(< 10.5 mmacosx-version-min= crt3.o%s)}" 365 366 /* We want a destructor last in the list. */ 367 #define TM_DESTRUCTOR "%{fgnu-tm: -lcrttme.o}" 368 #define ENDFILE_SPEC TM_DESTRUCTOR 369 370 #define DARWIN_EXTRA_SPECS \ 371 { "darwin_crt1", DARWIN_CRT1_SPEC }, \ 372 { "darwin_dylib1", DARWIN_DYLIB1_SPEC }, \ 373 { "darwin_minversion", DARWIN_MINVERSION_SPEC }, 374 375 #define DARWIN_DYLIB1_SPEC \ 376 "%:version-compare(!> 10.5 mmacosx-version-min= -ldylib1.o) \ 377 %:version-compare(>< 10.5 10.6 mmacosx-version-min= -ldylib1.10.5.o)" 378 379 #define DARWIN_CRT1_SPEC \ 380 "%:version-compare(!> 10.5 mmacosx-version-min= -lcrt1.o) \ 381 %:version-compare(>< 10.5 10.6 mmacosx-version-min= -lcrt1.10.5.o) \ 382 %:version-compare(>< 10.6 10.8 mmacosx-version-min= -lcrt1.10.6.o) \ 383 %{fgnu-tm: -lcrttms.o}" 384 385 /* Default Darwin ASM_SPEC, very simple. */ 386 #define ASM_SPEC "-arch %(darwin_arch) \ 387 %{Zforce_cpusubtype_ALL:-force_cpusubtype_ALL} \ 388 %{static}" 389 390 /* Default ASM_DEBUG_SPEC. Darwin's as cannot currently produce dwarf 391 debugging data. */ 392 393 #define ASM_DEBUG_SPEC "%{g*:%{!g0:%{!gdwarf*:--gstabs}}}" 394 395 /* We still allow output of STABS. */ 396 397 #define DBX_DEBUGGING_INFO 1 398 399 #define DWARF2_DEBUGGING_INFO 1 400 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG 401 402 #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" 413 #define DEBUG_MACRO_SECTION "__DWARF,__debug_macro,regular,debug" 414 415 #define TARGET_WANT_DEBUG_PUB_SECTIONS true 416 417 #define TARGET_FORCE_AT_COMP_DIR true 418 419 /* When generating stabs debugging, use N_BINCL entries. */ 420 421 #define DBX_USE_BINCL 422 423 /* There is no limit to the length of stabs strings. */ 424 425 #define DBX_CONTIN_LENGTH 0 426 427 /* gdb needs a null N_SO at the end of each file for scattered loading. */ 428 429 #define DBX_OUTPUT_NULL_N_SO_AT_MAIN_SOURCE_FILE_END 430 431 /* GCC's definition of 'one_only' is the same as its definition of 'weak'. */ 432 #define MAKE_DECL_ONE_ONLY(DECL) (DECL_WEAK (DECL) = 1) 433 434 /* Mach-O supports 'weak imports', and 'weak definitions' in coalesced 435 sections. machopic_select_section ensures that weak variables go in 436 coalesced sections. Weak aliases (or any other kind of aliases) are 437 not supported. Weak symbols that aren't visible outside the .s file 438 are not supported. */ 439 #define ASM_WEAKEN_DECL(FILE, DECL, NAME, ALIAS) \ 440 do { \ 441 if (ALIAS) \ 442 { \ 443 warning (0, "alias definitions not supported in Mach-O; ignored"); \ 444 break; \ 445 } \ 446 \ 447 if (! DECL_EXTERNAL (DECL) && TREE_PUBLIC (DECL)) \ 448 targetm.asm_out.globalize_label (FILE, NAME); \ 449 if (DECL_EXTERNAL (DECL)) \ 450 fputs ("\t.weak_reference ", FILE); \ 451 else if (lookup_attribute ("weak_import", DECL_ATTRIBUTES (DECL))) \ 452 break; \ 453 else if (TREE_PUBLIC (DECL)) \ 454 fputs ("\t.weak_definition ", FILE); \ 455 else \ 456 break; \ 457 assemble_name (FILE, NAME); \ 458 fputc ('\n', FILE); \ 459 } while (0) 460 461 /* Darwin has the pthread routines in libSystem, which every program 462 links to, so there's no need for weak-ness for that. */ 463 #define GTHREAD_USE_WEAK 0 464 465 /* The Darwin linker doesn't want coalesced symbols to appear in 466 a static archive's table of contents. */ 467 #undef TARGET_WEAK_NOT_IN_ARCHIVE_TOC 468 #define TARGET_WEAK_NOT_IN_ARCHIVE_TOC 1 469 470 /* On Darwin, we don't (at the time of writing) have linkonce sections 471 with names, so it's safe to make the class data not comdat. */ 472 #define TARGET_CXX_CLASS_DATA_ALWAYS_COMDAT hook_bool_void_false 473 474 /* For efficiency, on Darwin the RTTI information that is always 475 emitted in the standard C++ library should not be COMDAT. */ 476 #define TARGET_CXX_LIBRARY_RTTI_COMDAT hook_bool_void_false 477 478 /* We make exception information linkonce. */ 479 #undef TARGET_USES_WEAK_UNWIND_INFO 480 #define TARGET_USES_WEAK_UNWIND_INFO 1 481 482 /* We need to use a nonlocal label for the start of an EH frame: the 483 Darwin linker requires that a coalesced section start with a label. 484 Unfortunately, it also requires that 'debug' sections don't contain 485 labels. */ 486 #undef FRAME_BEGIN_LABEL 487 #define FRAME_BEGIN_LABEL (for_eh ? "EH_frame" : "Lframe") 488 489 /* Emit a label for the FDE corresponding to DECL. EMPTY means 490 emit a label for an empty FDE. */ 491 #define TARGET_ASM_EMIT_UNWIND_LABEL darwin_emit_unwind_label 492 493 /* Emit a label to separate the exception table. */ 494 #define TARGET_ASM_EMIT_EXCEPT_TABLE_LABEL darwin_emit_except_table_label 495 496 /* Our profiling scheme doesn't LP labels and counter words. */ 497 498 #define NO_PROFILE_COUNTERS 1 499 500 #undef INIT_SECTION_ASM_OP 501 #define INIT_SECTION_ASM_OP 502 503 #undef INVOKE__main 504 505 #define TARGET_ASM_CONSTRUCTOR machopic_asm_out_constructor 506 #define TARGET_ASM_DESTRUCTOR machopic_asm_out_destructor 507 508 /* Always prefix with an underscore. */ 509 510 #define USER_LABEL_PREFIX "_" 511 512 /* A dummy symbol that will be replaced with the function base name. */ 513 #define MACHOPIC_FUNCTION_BASE_NAME "<pic base>" 514 515 /* Don't output a .file directive. That is only used by the assembler for 516 error reporting. */ 517 #undef TARGET_ASM_FILE_START_FILE_DIRECTIVE 518 #define TARGET_ASM_FILE_START_FILE_DIRECTIVE false 519 520 #undef TARGET_ASM_FILE_END 521 #define TARGET_ASM_FILE_END darwin_file_end 522 523 /* Because Mach-O relocations have a counter from 1 to 255 for the 524 section number they apply to, it is necessary to output all 525 normal sections before the LTO sections, to make sure that the 526 sections that may have relocations always have a section number 527 smaller than 255. */ 528 #undef TARGET_ASM_LTO_START 529 #define TARGET_ASM_LTO_START darwin_asm_lto_start 530 #undef TARGET_ASM_LTO_END 531 #define TARGET_ASM_LTO_END darwin_asm_lto_end 532 533 #define ASM_OUTPUT_SKIP(FILE,SIZE) \ 534 fprintf (FILE, "\t.space "HOST_WIDE_INT_PRINT_UNSIGNED"\n", SIZE) 535 536 /* Give ObjC methods pretty symbol names. */ 537 538 #undef OBJC_GEN_METHOD_LABEL 539 #define OBJC_GEN_METHOD_LABEL(BUF,IS_INST,CLASS_NAME,CAT_NAME,SEL_NAME,NUM) \ 540 do { if (CAT_NAME) \ 541 sprintf (BUF, "%c[%s(%s) %s]", (IS_INST) ? '-' : '+', \ 542 (CLASS_NAME), (CAT_NAME), (SEL_NAME)); \ 543 else \ 544 sprintf (BUF, "%c[%s %s]", (IS_INST) ? '-' : '+', \ 545 (CLASS_NAME), (SEL_NAME)); \ 546 } while (0) 547 548 #undef ASM_DECLARE_OBJECT_NAME 549 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL) \ 550 darwin_asm_declare_object_name ((FILE), (NAME), (DECL)) 551 552 /* The RTTI data (e.g., __ti4name) is common and public (and static), 553 but it does need to be referenced via indirect PIC data pointers. 554 The machopic_define_symbol calls are telling the machopic subsystem 555 that the name *is* defined in this module, so it doesn't need to 556 make them indirect. */ 557 558 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \ 559 do { \ 560 const char *xname = NAME; \ 561 if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF) \ 562 xname = IDENTIFIER_POINTER (DECL_NAME (DECL)); \ 563 if (! DECL_WEAK (DECL) \ 564 && ((TREE_STATIC (DECL) \ 565 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \ 566 || DECL_INITIAL (DECL))) \ 567 machopic_define_symbol (DECL_RTL (DECL)); \ 568 if ((TREE_STATIC (DECL) \ 569 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \ 570 || DECL_INITIAL (DECL)) \ 571 (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false); \ 572 ASM_OUTPUT_FUNCTION_LABEL (FILE, xname, DECL); \ 573 } while (0) 574 575 #undef TARGET_ASM_DECLARE_CONSTANT_NAME 576 #define TARGET_ASM_DECLARE_CONSTANT_NAME darwin_asm_declare_constant_name 577 578 /* Wrap new method names in quotes so the assembler doesn't gag. 579 Make Objective-C internal symbols local and in doing this, we need 580 to accommodate the name mangling done by c++ on file scope locals. */ 581 582 int darwin_label_is_anonymous_local_objc_name (const char *name); 583 584 #undef ASM_OUTPUT_LABELREF 585 #define ASM_OUTPUT_LABELREF(FILE,NAME) \ 586 do { \ 587 const char *xname = (NAME); \ 588 if (! strcmp (xname, MACHOPIC_FUNCTION_BASE_NAME)) \ 589 machopic_output_function_base_name(FILE); \ 590 else if (xname[0] == '&' || xname[0] == '*') \ 591 { \ 592 int len = strlen (xname); \ 593 if (len > 6 && !strcmp ("$stub", xname + len - 5)) \ 594 machopic_validate_stub_or_non_lazy_ptr (xname); \ 595 else if (len > 7 && !strcmp ("$stub\"", xname + len - 6)) \ 596 machopic_validate_stub_or_non_lazy_ptr (xname); \ 597 else if (len > 14 && !strcmp ("$non_lazy_ptr", xname + len - 13)) \ 598 machopic_validate_stub_or_non_lazy_ptr (xname); \ 599 else if (len > 15 && !strcmp ("$non_lazy_ptr\"", xname + len - 14)) \ 600 machopic_validate_stub_or_non_lazy_ptr (xname); \ 601 if (xname[1] != '"' && name_needs_quotes (&xname[1])) \ 602 fprintf (FILE, "\"%s\"", &xname[1]); \ 603 else \ 604 fputs (&xname[1], FILE); \ 605 } \ 606 else if (xname[0] == '+' || xname[0] == '-') \ 607 fprintf (FILE, "\"%s\"", xname); \ 608 else if (darwin_label_is_anonymous_local_objc_name (xname)) \ 609 fprintf (FILE, "L%s", xname); \ 610 else if (xname[0] != '"' && name_needs_quotes (xname)) \ 611 asm_fprintf (FILE, "\"%U%s\"", xname); \ 612 else \ 613 asm_fprintf (FILE, "%U%s", xname); \ 614 } while (0) 615 616 /* Output before executable code. */ 617 #undef TEXT_SECTION_ASM_OP 618 #define TEXT_SECTION_ASM_OP "\t.text" 619 620 /* Output before writable data. */ 621 622 #undef DATA_SECTION_ASM_OP 623 #define DATA_SECTION_ASM_OP "\t.data" 624 625 #undef ALIGN_ASM_OP 626 #define ALIGN_ASM_OP ".align" 627 628 #undef ASM_OUTPUT_ALIGN 629 #define ASM_OUTPUT_ALIGN(FILE,LOG) \ 630 if ((LOG) != 0) \ 631 fprintf (FILE, "\t%s\t%d\n", ALIGN_ASM_OP, (LOG)) 632 633 /* The maximum alignment which the object file format can support in 634 bits. For Mach-O, this is 2^15 bytes. */ 635 636 #undef MAX_OFILE_ALIGNMENT 637 #define MAX_OFILE_ALIGNMENT (0x8000 * 8) 638 639 #define L2_MAX_OFILE_ALIGNMENT 15 640 641 /* These are the three variants that emit referenced blank space. */ 642 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \ 643 darwin_output_aligned_bss ((FILE), (DECL), (NAME), (SIZE), (ALIGN)) 644 645 #undef ASM_OUTPUT_ALIGNED_DECL_LOCAL 646 #define ASM_OUTPUT_ALIGNED_DECL_LOCAL(FILE, DECL, NAME, SIZE, ALIGN) \ 647 darwin_asm_output_aligned_decl_local \ 648 ((FILE), (DECL), (NAME), (SIZE), (ALIGN)) 649 650 #undef ASM_OUTPUT_ALIGNED_DECL_COMMON 651 #define ASM_OUTPUT_ALIGNED_DECL_COMMON(FILE, DECL, NAME, SIZE, ALIGN) \ 652 darwin_asm_output_aligned_decl_common \ 653 ((FILE), (DECL), (NAME), (SIZE), (ALIGN)) 654 655 /* The generic version, archs should over-ride where required. */ 656 #define MACHOPIC_NL_SYMBOL_PTR_SECTION ".non_lazy_symbol_pointer" 657 658 /* Declare the section variables. */ 659 #ifndef USED_FOR_TARGET 660 enum darwin_section_enum { 661 #define DEF_SECTION(NAME, FLAGS, DIRECTIVE, OBJC) NAME, 662 #include "darwin-sections.def" 663 #undef DEF_SECTION 664 NUM_DARWIN_SECTIONS 665 }; 666 extern GTY(()) section * darwin_sections[NUM_DARWIN_SECTIONS]; 667 #endif 668 669 #undef TARGET_ASM_SELECT_SECTION 670 #define TARGET_ASM_SELECT_SECTION machopic_select_section 671 672 #undef TARGET_ASM_FUNCTION_SECTION 673 #define TARGET_ASM_FUNCTION_SECTION darwin_function_section 674 675 #undef TARGET_ASM_FUNCTION_SWITCHED_TEXT_SECTIONS 676 #define TARGET_ASM_FUNCTION_SWITCHED_TEXT_SECTIONS \ 677 darwin_function_switched_text_sections 678 679 #undef TARGET_ASM_SELECT_RTX_SECTION 680 #define TARGET_ASM_SELECT_RTX_SECTION machopic_select_rtx_section 681 #undef TARGET_ASM_UNIQUE_SECTION 682 #define TARGET_ASM_UNIQUE_SECTION darwin_unique_section 683 #undef TARGET_ASM_FUNCTION_RODATA_SECTION 684 #define TARGET_ASM_FUNCTION_RODATA_SECTION default_no_function_rodata_section 685 686 #undef TARGET_ASM_TM_CLONE_TABLE_SECTION 687 #define TARGET_ASM_TM_CLONE_TABLE_SECTION darwin_tm_clone_table_section 688 689 #undef TARGET_ASM_RELOC_RW_MASK 690 #define TARGET_ASM_RELOC_RW_MASK machopic_reloc_rw_mask 691 692 /* Globalizing directive for a label. */ 693 #define GLOBAL_ASM_OP "\t.globl " 694 #define TARGET_ASM_GLOBALIZE_LABEL darwin_globalize_label 695 696 /* Emit an assembler directive to set visibility for a symbol. Used 697 to support visibility attribute and Darwin's private extern 698 feature. */ 699 #undef TARGET_ASM_ASSEMBLE_VISIBILITY 700 #define TARGET_ASM_ASSEMBLE_VISIBILITY darwin_assemble_visibility 701 702 /* Extra attributes for Darwin. */ 703 #define SUBTARGET_ATTRIBUTE_TABLE \ 704 /* { name, min_len, max_len, decl_req, type_req, fn_type_req, handler, \ 705 affects_type_identity } */ \ 706 { "apple_kext_compatibility", 0, 0, false, true, false, \ 707 darwin_handle_kext_attribute, false }, \ 708 { "weak_import", 0, 0, true, false, false, \ 709 darwin_handle_weak_import_attribute, false } 710 711 #undef ASM_GENERATE_INTERNAL_LABEL 712 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM) \ 713 sprintf (LABEL, "*%s%ld", PREFIX, (long)(NUM)) 714 715 #undef TARGET_ASM_MARK_DECL_PRESERVED 716 #define TARGET_ASM_MARK_DECL_PRESERVED darwin_mark_decl_preserved 717 718 /* Set on a symbol with SYMBOL_FLAG_FUNCTION or 719 MACHO_SYMBOL_FLAG_VARIABLE to indicate that the function or 720 variable has been defined in this translation unit. 721 When porting Mach-O to new architectures you need to make 722 sure these aren't clobbered by the backend. */ 723 724 #define MACHO_SYMBOL_FLAG_VARIABLE (SYMBOL_FLAG_MACH_DEP) 725 #define MACHO_SYMBOL_FLAG_DEFINED ((SYMBOL_FLAG_MACH_DEP) << 1) 726 727 /* Set on a symbol to indicate when fix-and-continue style code 728 generation is being used and the symbol refers to a static symbol 729 that should be rebound from new instances of a translation unit to 730 the original instance of the data. */ 731 732 #define MACHO_SYMBOL_STATIC ((SYMBOL_FLAG_MACH_DEP) << 2) 733 734 /* Symbolic names for various things we might know about a symbol. */ 735 736 enum machopic_addr_class { 737 MACHOPIC_UNDEFINED, 738 MACHOPIC_DEFINED_DATA, 739 MACHOPIC_UNDEFINED_DATA, 740 MACHOPIC_DEFINED_FUNCTION, 741 MACHOPIC_UNDEFINED_FUNCTION 742 }; 743 744 /* Macros defining the various PIC cases. */ 745 746 #undef MACHO_DYNAMIC_NO_PIC_P 747 #define MACHO_DYNAMIC_NO_PIC_P (TARGET_MACHO_DYNAMIC_NO_PIC) 748 #undef MACHOPIC_INDIRECT 749 #define MACHOPIC_INDIRECT (flag_pic || MACHO_DYNAMIC_NO_PIC_P) 750 #define MACHOPIC_JUST_INDIRECT (MACHO_DYNAMIC_NO_PIC_P) 751 #undef MACHOPIC_PURE 752 #define MACHOPIC_PURE (flag_pic && ! MACHO_DYNAMIC_NO_PIC_P) 753 754 #undef TARGET_ENCODE_SECTION_INFO 755 #define TARGET_ENCODE_SECTION_INFO darwin_encode_section_info 756 #undef TARGET_STRIP_NAME_ENCODING 757 #define TARGET_STRIP_NAME_ENCODING default_strip_name_encoding 758 759 #define GEN_BINDER_NAME_FOR_STUB(BUF,STUB,STUB_LENGTH) \ 760 do { \ 761 const char *const stub_ = (STUB); \ 762 char *buffer_ = (BUF); \ 763 strcpy (buffer_, stub_); \ 764 if (stub_[0] == '"') \ 765 { \ 766 strcpy (buffer_ + (STUB_LENGTH) - 1, "_binder\""); \ 767 } \ 768 else \ 769 { \ 770 strcpy (buffer_ + (STUB_LENGTH), "_binder"); \ 771 } \ 772 } while (0) 773 774 #define GEN_SYMBOL_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH) \ 775 do { \ 776 const char *const symbol_ = (SYMBOL); \ 777 char *buffer_ = (BUF); \ 778 if (name_needs_quotes (symbol_) && symbol_[0] != '"') \ 779 { \ 780 sprintf (buffer_, "\"%s\"", symbol_); \ 781 } \ 782 else \ 783 { \ 784 strcpy (buffer_, symbol_); \ 785 } \ 786 } while (0) 787 788 /* Given a symbol name string, create the lazy pointer version 789 of the symbol name. */ 790 791 #define GEN_LAZY_PTR_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH) \ 792 do { \ 793 const char *symbol_ = (SYMBOL); \ 794 char *buffer_ = (BUF); \ 795 if (symbol_[0] == '"') \ 796 { \ 797 strcpy (buffer_, "\"L"); \ 798 strcpy (buffer_ + 2, symbol_ + 1); \ 799 strcpy (buffer_ + (SYMBOL_LENGTH), "$lazy_ptr\""); \ 800 } \ 801 else if (name_needs_quotes (symbol_)) \ 802 { \ 803 strcpy (buffer_, "\"L"); \ 804 strcpy (buffer_ + 2, symbol_); \ 805 strcpy (buffer_ + (SYMBOL_LENGTH) + 2, "$lazy_ptr\""); \ 806 } \ 807 else \ 808 { \ 809 strcpy (buffer_, "L"); \ 810 strcpy (buffer_ + 1, symbol_); \ 811 strcpy (buffer_ + (SYMBOL_LENGTH) + 1, "$lazy_ptr"); \ 812 } \ 813 } while (0) 814 815 #define EH_FRAME_SECTION_NAME "__TEXT" 816 #define EH_FRAME_SECTION_ATTR ",coalesced,no_toc+strip_static_syms+live_support" 817 818 /* Java runtime class list. */ 819 #define JCR_SECTION_NAME "__DATA,jcr,regular,no_dead_strip" 820 821 #undef ASM_PREFERRED_EH_DATA_FORMAT 822 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL) \ 823 (((CODE) == 2 && (GLOBAL) == 1) \ 824 ? (DW_EH_PE_pcrel | DW_EH_PE_indirect | DW_EH_PE_sdata4) : \ 825 ((CODE) == 1 || (GLOBAL) == 0) ? DW_EH_PE_pcrel : DW_EH_PE_absptr) 826 827 #define ASM_OUTPUT_DWARF_DELTA(FILE,SIZE,LABEL1,LABEL2) \ 828 darwin_asm_output_dwarf_delta (FILE, SIZE, LABEL1, LABEL2) 829 830 #define ASM_OUTPUT_DWARF_OFFSET(FILE,SIZE,LABEL,BASE) \ 831 darwin_asm_output_dwarf_offset (FILE, SIZE, LABEL, BASE) 832 833 #define ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX(ASM_OUT_FILE, ENCODING, SIZE, ADDR, DONE) \ 834 if (ENCODING == ASM_PREFERRED_EH_DATA_FORMAT (2, 1)) { \ 835 darwin_non_lazy_pcrel (ASM_OUT_FILE, ADDR); \ 836 goto DONE; \ 837 } 838 839 /* Experimentally, putting jump tables in text is faster on SPEC. 840 Also this is needed for correctness for coalesced functions. */ 841 842 #ifndef JUMP_TABLES_IN_TEXT_SECTION 843 #define JUMP_TABLES_IN_TEXT_SECTION 1 844 #endif 845 846 #define TARGET_TERMINATE_DW2_EH_FRAME_INFO false 847 848 #define TARGET_ASM_INIT_SECTIONS darwin_init_sections 849 #undef TARGET_ASM_NAMED_SECTION 850 #define TARGET_ASM_NAMED_SECTION darwin_asm_named_section 851 852 #define DARWIN_REGISTER_TARGET_PRAGMAS() \ 853 do { \ 854 if (!flag_preprocess_only) \ 855 cpp_register_pragma (parse_in, NULL, "mark", \ 856 darwin_pragma_ignore, false); \ 857 c_register_pragma (0, "options", darwin_pragma_options); \ 858 c_register_pragma (0, "segment", darwin_pragma_ignore); \ 859 c_register_pragma (0, "unused", darwin_pragma_unused); \ 860 c_register_pragma (0, "ms_struct", darwin_pragma_ms_struct); \ 861 } while (0) 862 863 #undef ASM_APP_ON 864 #define ASM_APP_ON "" 865 #undef ASM_APP_OFF 866 #define ASM_APP_OFF "" 867 868 void darwin_register_frameworks (const char *, const char *, int); 869 void darwin_register_objc_includes (const char *, const char *, int); 870 #define TARGET_EXTRA_PRE_INCLUDES darwin_register_objc_includes 871 #define TARGET_EXTRA_INCLUDES darwin_register_frameworks 872 873 void add_framework_path (char *); 874 #define TARGET_OPTF add_framework_path 875 876 #define TARGET_POSIX_IO 877 878 #define WINT_TYPE "int" 879 880 /* Every program on darwin links against libSystem which contains the pthread 881 routines, so there's no need to explicitly call out when doing threaded 882 work. */ 883 884 #undef GOMP_SELF_SPECS 885 #define GOMP_SELF_SPECS "" 886 #undef GTM_SELF_SPECS 887 #define GTM_SELF_SPECS "" 888 889 /* Darwin disables section anchors by default. 890 They should be enabled per arch where support exists in that arch. */ 891 #define TARGET_ASM_OUTPUT_ANCHOR NULL 892 #define DARWIN_SECTION_ANCHORS 0 893 894 #define HAVE_ENABLE_EXECUTE_STACK 895 896 /* For Apple KEXTs, we make the constructors return this to match gcc 897 2.95. */ 898 #define TARGET_CXX_CDTOR_RETURNS_THIS (darwin_kextabi_p) 899 #define TARGET_KEXTABI flag_apple_kext 900 901 /* We have target-specific builtins. */ 902 #define SUBTARGET_FOLD_BUILTIN darwin_fold_builtin 903 904 #define TARGET_N_FORMAT_TYPES 1 905 #define TARGET_FORMAT_TYPES darwin_additional_format_types 906 907 #ifndef USED_FOR_TARGET 908 extern void darwin_driver_init (unsigned int *,struct cl_decoded_option **); 909 #define GCC_DRIVER_HOST_INITIALIZATION \ 910 darwin_driver_init (&decoded_options_count, &decoded_options) 911 #endif 912 913 /* The Apple assembler and linker do not support constructor priorities. */ 914 #undef SUPPORTS_INIT_PRIORITY 915 #define SUPPORTS_INIT_PRIORITY 0 916 917 /* When building cross-compilers (and native crosses) we shall default to 918 providing an osx-version-min of this unless overridden by the User. */ 919 #define DEF_MIN_OSX_VERSION "10.4" 920 921 #endif /* CONFIG_DARWIN_H */ 922