1 /* Target definitions for Darwin (Mac OS X) systems. 2 Copyright (C) 1989-2020 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 /* Suppress g++ attempt to link in the math library automatically. */ 47 #define MATH_LIBRARY "" 48 49 /* We have atexit. */ 50 51 #define HAVE_ATEXIT 52 53 /* Define an empty body for the function do_global_dtors() in libgcc2.c. */ 54 55 #define DO_GLOBAL_DTORS_BODY 56 57 /* Register static destructors to run from __cxa_atexit instead of putting 58 them into a .mod_term_funcs section. */ 59 60 #define TARGET_DTORS_FROM_CXA_ATEXIT true 61 62 /* The string value for __SIZE_TYPE__. */ 63 64 #ifndef SIZE_TYPE 65 #define SIZE_TYPE "long unsigned int" 66 #endif 67 68 /* Type used for ptrdiff_t, as a string used in a declaration. */ 69 70 #undef PTRDIFF_TYPE 71 #define PTRDIFF_TYPE "int" 72 73 /* wchar_t is int. */ 74 75 #undef WCHAR_TYPE 76 #define WCHAR_TYPE "int" 77 #undef WCHAR_TYPE_SIZE 78 #define WCHAR_TYPE_SIZE 32 79 80 #define INT8_TYPE "signed char" 81 #define INT16_TYPE "short int" 82 #define INT32_TYPE "int" 83 #define INT64_TYPE "long long int" 84 #define UINT8_TYPE "unsigned char" 85 #define UINT16_TYPE "short unsigned int" 86 #define UINT32_TYPE "unsigned int" 87 #define UINT64_TYPE "long long unsigned int" 88 89 #define INT_LEAST8_TYPE "signed char" 90 #define INT_LEAST16_TYPE "short int" 91 #define INT_LEAST32_TYPE "int" 92 #define INT_LEAST64_TYPE "long long int" 93 #define UINT_LEAST8_TYPE "unsigned char" 94 #define UINT_LEAST16_TYPE "short unsigned int" 95 #define UINT_LEAST32_TYPE "unsigned int" 96 #define UINT_LEAST64_TYPE "long long unsigned int" 97 98 #define INT_FAST8_TYPE "signed char" 99 #define INT_FAST16_TYPE "short int" 100 #define INT_FAST32_TYPE "int" 101 #define INT_FAST64_TYPE "long long int" 102 #define UINT_FAST8_TYPE "unsigned char" 103 #define UINT_FAST16_TYPE "short unsigned int" 104 #define UINT_FAST32_TYPE "unsigned int" 105 #define UINT_FAST64_TYPE "long long unsigned int" 106 107 #define INTPTR_TYPE "long int" 108 #define UINTPTR_TYPE "long unsigned int" 109 110 #define SIG_ATOMIC_TYPE "int" 111 112 /* Default to using the NeXT-style runtime, since that's what is 113 pre-installed on Darwin systems. */ 114 115 #define NEXT_OBJC_RUNTIME 100508 116 117 /* Don't default to pcc-struct-return, because gcc is the only compiler, and 118 we want to retain compatibility with older gcc versions. */ 119 120 #undef DEFAULT_PCC_STRUCT_RETURN 121 #define DEFAULT_PCC_STRUCT_RETURN 0 122 123 /* True if pragma ms_struct is in effect. */ 124 extern GTY(()) int darwin_ms_struct; 125 126 /* Darwin has a user convenience feature where some linker options are exposed 127 at the driver level (so one can type "-all_load" instead of "-Wl,-all_load" 128 or "-Xlinker -all_load"). We retain this, but now these options are all 129 marked as 'Driver' and we process them as early as possible so that they 130 get allocated to the right toolchain command. There are a couple of special 131 cases where these driver opts are used multiple times, or to control 132 operations on more than one command (e.g. dynamiclib). These are handled 133 specially and we then add %<xxxx specs for the commands that _don't_ need 134 them. NOTE: the order of 'shared' and 'dynamiclib' is significant, hence 135 they are placed out of alphabetical order at the start. Likewise, we keep 136 a couple of cases where a negative option originally appeared after the 137 positive alternate, potentially overriding it. 138 When we report an error with %e, it seems necessary to strip the option 139 before doing so, otherwise it survives to the cc1 command line (%e doesn't 140 appear to abort the program before this). 141 Right now there's no mechanism to split up the "variable portion" (%*) of 142 the matched spec string, so where we have some driver specs that take 2 143 or 3 arguments, these cannot be processed here, but are deferred until the 144 LINK_SPEC, where they are copied verbatim. */ 145 146 #undef SUBTARGET_DRIVER_SELF_SPECS 147 #define SUBTARGET_DRIVER_SELF_SPECS \ 148 "%{shared:%{!dynamiclib:-dynamiclib}} %<shared", \ 149 "%{static:%{dynamic|dynamiclib:%econflicting code generation switches}}",\ 150 "%{dynamiclib:-Xlinker -dylib \ 151 %{allowable_client*:-Xlinker -allowable_client -Xlinker %*} \ 152 %<allowable_client* \ 153 %{bundle_loader*: %<bundle_loader* \ 154 %e-bundle_loader not allowed with -dynamiclib} \ 155 %{client_name*: %<client_name* \ 156 %e-client_name not allowed with -dynamiclib} \ 157 %{compatibility_version*:\ 158 -Xlinker -dylib_compatibility_version -Xlinker %*} \ 159 %<compatibility_version* \ 160 %{current_version*:-Xlinker -dylib_current_version -Xlinker %*} \ 161 %<current_version* \ 162 %{install_name*:-Xlinker -dylib_install_name -Xlinker %* } \ 163 %<install_name* \ 164 %{keep_private_externs: %<keep_private_externs \ 165 %e-keep_private_externs not allowed with -dynamiclib} \ 166 %{private_bundle: %<private_bundle \ 167 %e-private_bundle not allowed with -dynamiclib} \ 168 }", \ 169 "%{!dynamiclib: \ 170 %{bundle_loader*:-Xlinker -bundle_loader -Xlinker %*} \ 171 %<bundle_loader* \ 172 %{client_name*:-Xlinker -client_name -Xlinker %*} \ 173 %<client_name* \ 174 %{compatibility_version*: %<compatibility_version* \ 175 %e-compatibility_version only allowed with -dynamiclib} \ 176 %{current_version*: %<current_version* \ 177 %e-current_version only allowed with -dynamiclib} \ 178 %{install_name*: %<install_name* \ 179 %e-install_name only allowed with -dynamiclib} \ 180 %{keep_private_externs:-Xlinker -keep_private_externs} \ 181 %<keep_private_externs \ 182 %{private_bundle:-Xlinker -private_bundle} \ 183 %<private_bundle \ 184 }", \ 185 "%{all_load:-Xlinker -all_load} %<all_load", \ 186 "%{arch_errors_fatal:-Xlinker -arch_errors_fatal} \ 187 %<arch_errors_fatal", \ 188 "%{bind_at_load:-Xlinker -bind_at_load} %<bind_at_load", \ 189 "%{bundle:%{!dynamiclib:-Xlinker -bundle; \ 190 :%e-bundle not allowed with -dynamiclib}}", \ 191 "%{dead_strip:-Xlinker -dead_strip} %<dead_strip", \ 192 "%{dylib_file*:-Xlinker -dylib_file -Xlinker %*} %<dylib_file*", \ 193 "%{dylinker:-Xlinker -dylinker} %<dylinker", \ 194 "%{dylinker_install_name*:-Xlinker -dylinker_install_name -Xlinker %*}\ 195 %<dylinker_install_name*", \ 196 "%{exported_symbols_list*:-Xlinker -exported_symbols_list -Xlinker %*}\ 197 %<exported_symbols_list", \ 198 "%{findirect-virtual-calls: -fapple-kext} %<findirect-virtual-calls", \ 199 "%{fterminated-vtables: -fapple-kext} %<fterminated-vtables", \ 200 "%{fapple-kext|mkernel:-static}", \ 201 "%{filelist*:-Xlinker -filelist -Xlinker %*} %<filelist*", \ 202 "%{flat_namespace:-Xlinker -flat_namespace} %<flat_namespace", \ 203 "%{force_cpusubtype_ALL:-Xassembler -force_cpusubtype_ALL} ", \ 204 "%{force_flat_namespace: \ 205 %{!dynamiclib:-Xlinker -force_flat_namespace; \ 206 :%e-force_flat_namespace not allowed with -dynamiclib}} \ 207 %<force_flat_namespace", \ 208 "%{framework*:-Xlinker -framework -Xlinker %*} %<framework*", \ 209 "%{gfull:-g -fno-eliminate-unused-debug-symbols} %<gfull", \ 210 "%{gused:-g -feliminate-unused-debug-symbols} %<gused", \ 211 "%{gsplit-dwarf:%ngsplit-dwarf is not supported on this platform} \ 212 %<gsplit-dwarf", \ 213 "%{headerpad_max_install_names:-Xlinker -headerpad_max_install_names}\ 214 %<headerpad_max_install_names", \ 215 "%{image_base*:-Xlinker -image_base -Xlinker %*} %<image_base*", \ 216 "%{init*:-Xlinker -init -Xlinker %*} %<init*", \ 217 "%{multi_module:-Xlinker -multi_module} %<multi_module", \ 218 "%{multiply_defined*:-Xlinker -multiply_defined -Xlinker %*} \ 219 %<multiply_defined* ", \ 220 "%{multiplydefinedunused*:\ 221 -Xlinker -multiply_defined_unused -Xlinker %*} \ 222 %<multiplydefinedunused* ", \ 223 "%{no_dead_strip_inits_and_terms:\ 224 -Xlinker -no_dead_strip_inits_and_terms} \ 225 %<no_dead_strip_inits_and_terms", \ 226 "%{nofixprebinding:-Xlinker -nofixprebinding} %<nofixprebinding", \ 227 "%{nomultidefs:-Xlinker -nomultidefs} %<nomultidefs", \ 228 "%{pagezero_size*:-Xlinker -pagezero_size -Xlinker %*} \ 229 %<pagezero_size", \ 230 "%{prebind:-Xlinker -prebind} %<prebind", \ 231 "%{noprebind:-Xlinker -noprebind} %<noprebind", \ 232 "%{prebind_all_twolevel_modules:\ 233 -Xlinker -prebind_all_twolevel_modules} \ 234 %<prebind_all_twolevel_modules", \ 235 "%{preload:-Xlinker -preload} %<preload", \ 236 "%{read_only_relocs*:-Xlinker -read_only_relocs -Xlinker %*} \ 237 %<read_only_relocs*", \ 238 "%{rpath*: -Xlinker -rpath -Xlinker %*}", \ 239 "%{seg_addr_table_filename*: \ 240 -Xlinker -seg_addr_table_filename -Xlinker %*} \ 241 %<seg_addr_table_filename*", \ 242 "%{seg_addr_table*:-Xlinker -seg_addr_table -Xlinker %*} \ 243 %<seg_addr_table*", \ 244 "%{seg1addr*:-Xlinker -image_base -Xlinker %*} %<seg1addr*", \ 245 "%{seglinkedit:-Xlinker -seglinkedit} %<seglinkedit", \ 246 "%{noseglinkedit:-Xlinker -noseglinkedit} %<noseglinkedit", \ 247 "%{segs_read_only_addr*:-Xlinker -segs_read_only_addr -Xlinker %*} \ 248 %<segs_read_only_addr*", \ 249 "%{segs_read_write_addr*:-Xlinker -segs_read_write_addr -Xlinker %*} \ 250 %<segs_read_write_addr*", \ 251 "%{single_module:-Xlinker -single_module} %<single_module", \ 252 "%{sub_library*:-Xlinker -sub_library -Xlinker %*} %<sub_library*", \ 253 "%{sub_umbrella*:-Xlinker -sub_umbrella -Xlinker %*} %<sub_umbrella*",\ 254 "%{twolevel_namespace:-Xlinker -twolevel_namespace} \ 255 %<twolevel_namespace", \ 256 "%{twolevel_namespace_hints:-Xlinker -twolevel_namespace_hints} \ 257 %<twolevel_namespace_hints", \ 258 "%{umbrella*:-Xlinker -umbrella -Xlinker %*} %<umbrella*", \ 259 "%{undefined*:-Xlinker -undefined -Xlinker %*} %<undefined*", \ 260 "%{unexported_symbols_list*:\ 261 -Xlinker -unexported_symbols_list -Xlinker %*} \ 262 %<unexported_symbols_list*", \ 263 "%{weak_reference_mismatches*:\ 264 -Xlinker -weak_reference_mismatches -Xlinker %*} \ 265 %<weak_reference_mismatches*", \ 266 "%{whyload:-Xlinker -whyload} %<whyload", \ 267 "%{whatsloaded:-Xlinker -whatsloaded} %<whatsloaded", \ 268 "%{w:-Xlinker -w}", \ 269 "%<y*", \ 270 "%<Mach " 271 272 #if LD64_HAS_EXPORT_DYNAMIC 273 #define DARWIN_RDYNAMIC "%{rdynamic:-export_dynamic}" 274 #else 275 #define DARWIN_RDYNAMIC "%{rdynamic:%nrdynamic is not supported}" 276 #endif 277 278 /* FIXME: we should check that the linker supports the -pie and -no_pie. 279 options. */ 280 #define DARWIN_PIE_SPEC \ 281 "%{pie|fpie|fPIE:\ 282 %{mdynamic-no-pic: \ 283 %n'-mdynamic-no-pic' overrides '-pie', '-fpie' or '-fPIE'; \ 284 :%:version-compare(>= 10.5 mmacosx-version-min= -pie) }} " 285 286 #define DARWIN_NOPIE_SPEC \ 287 "%{no-pie|fno-pie|fno-PIE: \ 288 %:version-compare(>= 10.7 mmacosx-version-min= -no_pie) }" 289 290 #define DARWIN_CC1_SPEC \ 291 "%<dynamic %<dynamiclib %<force_cpusubtype_ALL " 292 293 #define SUBSUBTARGET_OVERRIDE_OPTIONS \ 294 do { \ 295 darwin_override_options (); \ 296 } while (0) 297 298 #define SUBTARGET_C_COMMON_OVERRIDE_OPTIONS do { \ 299 if (flag_mkernel || flag_apple_kext) \ 300 { \ 301 if (flag_use_cxa_atexit == 2) \ 302 flag_use_cxa_atexit = 0; \ 303 /* kexts should always be built without the coalesced sections \ 304 because the kernel loader doesn't grok such sections. */ \ 305 flag_weak = 0; \ 306 /* No RTTI in kexts. */ \ 307 flag_rtti = 0; \ 308 } \ 309 } while (0) 310 311 /* Machine dependent cpp options. Don't add more options here, add 312 them to darwin_cpp_builtins in darwin-c.c. */ 313 314 #undef CPP_SPEC 315 #define CPP_SPEC "%{static:%{!dynamic:-D__STATIC__}}%{!static:-D__DYNAMIC__}" \ 316 " %{pthread:-D_REENTRANT} " 317 318 /* This is a fix for PR41260 by passing -no_compact_unwind on darwin10 and 319 later until the assembler, linker and libunwind are able to deal with the 320 output from GCC. 321 322 FIXME: we should check that the linker supports the option. 323 */ 324 325 #define DARWIN_NOCOMPACT_UNWIND \ 326 " %:version-compare(>= 10.6 mmacosx-version-min= -no_compact_unwind) " 327 328 /* In Darwin linker specs we can put -lcrt0.o and ld will search the library 329 path for crt0.o or -lcrtx.a and it will search for for libcrtx.a. As for 330 other ports, we can also put xxx.{o,a}%s and get the appropriate complete 331 startfile absolute directory. This latter point is important when we want 332 to override ld's rule of .dylib being found ahead of .a and the user wants 333 the convenience library to be linked. */ 334 335 /* The LINK_COMMAND spec is mostly a clone of the standard LINK_COMMAND_SPEC, 336 plus precomp, libtool, and fat build additions. 337 338 In general, random Darwin linker flags should go into LINK_SPEC 339 instead of LINK_COMMAND_SPEC. The command spec is better for 340 specifying the handling of options understood by generic Unix 341 linkers, and for positional arguments like libraries. */ 342 343 #define LINK_COMMAND_SPEC_A \ 344 "%{!c:%{!E:%{!S:%{!M:%{!MM:%{!fsyntax-only:%{!fdump=*: \ 345 %(linker)" \ 346 LINK_PLUGIN_SPEC \ 347 "%{flto*:%<fcompare-debug*} \ 348 %{flto} %{fno-lto} %{flto=*} \ 349 %l " LINK_COMPRESS_DEBUG_SPEC \ 350 "%X %{s} %{t} %{Z} %{u*} \ 351 %{e*} %{r} \ 352 %{o*}%{!o:-o a.out} \ 353 %{!r:%{!nostdlib:%{!nostartfiles:%S}}} \ 354 %{L*} %(link_libgcc) %o \ 355 %{!r:%{!nostdlib:%{!nodefaultlibs:\ 356 %{fprofile-arcs|fprofile-generate*|coverage:-lgcov} \ 357 %{fopenacc|fopenmp|%:gt(%{ftree-parallelize-loops=*:%*} 1): \ 358 %{static|static-libgcc|static-libstdc++|static-libgfortran: \ 359 libgomp.a%s; : -lgomp }} \ 360 %{fgnu-tm: \ 361 %{static|static-libgcc|static-libstdc++|static-libgfortran: \ 362 libitm.a%s; : -litm }} \ 363 %{%:sanitize(address): -lasan } \ 364 %{%:sanitize(undefined): -lubsan } \ 365 %(link_ssp) \ 366 %:version-compare(>< 10.6 10.7 mmacosx-version-min= -ld10-uwfef) \ 367 %(link_gcc_c_sequence) \ 368 %{!nodefaultexport:%{dylib|dynamiclib|bundle: \ 369 %:version-compare(>= 10.11 asm_macosx_version_min= -U) \ 370 %:version-compare(>= 10.11 asm_macosx_version_min= ___emutls_get_address) \ 371 %:version-compare(>= 10.11 asm_macosx_version_min= -exported_symbol) \ 372 %:version-compare(>= 10.11 asm_macosx_version_min= ___emutls_get_address) \ 373 %:version-compare(>= 10.11 asm_macosx_version_min= -U) \ 374 %:version-compare(>= 10.11 asm_macosx_version_min= ___emutls_register_common) \ 375 %:version-compare(>= 10.11 asm_macosx_version_min= -exported_symbol) \ 376 %:version-compare(>= 10.11 asm_macosx_version_min= ___emutls_register_common) \ 377 }} \ 378 }}}\ 379 %{!r:%{!nostdlib:%{!nostartfiles:%E}}} %{T*} %{F*} "\ 380 DARWIN_PIE_SPEC \ 381 DARWIN_NOPIE_SPEC \ 382 DARWIN_RDYNAMIC \ 383 DARWIN_NOCOMPACT_UNWIND \ 384 "}}}}}}} %<pie %<no-pie %<rdynamic " 385 386 /* Spec that controls whether the debug linker is run automatically for 387 a link step. This needs to be done if there is a source file on the 388 command line which will result in a temporary object (and debug is 389 enabled). */ 390 391 #define DSYMUTIL_SPEC \ 392 "%{!c:%{!E:%{!S:%{!r:%{!M:%{!MM:%{!fsyntax-only:%{!fdump=*:\ 393 %{g*:%{!gstabs*:%{%:debug-level-gt(0): -idsym \ 394 %{.c|.cc|.C|.cpp|.cp|.c++|.cxx|.CPP|.m|.mm|.s|.f|.f90|\ 395 .f95|.f03|.f77|.for|.F|.F90|.F95|.F03|.d: -dsym }\ 396 }}}\ 397 }}}}}}}}" 398 399 #define LINK_COMMAND_SPEC LINK_COMMAND_SPEC_A DSYMUTIL_SPEC 400 401 /* Tell collect2 to run dsymutil for us as necessary. */ 402 #define COLLECT_RUN_DSYMUTIL 1 403 404 /* We only want one instance of %G, since libSystem (Darwin's -lc) does not 405 depend on libgcc. */ 406 #undef LINK_GCC_C_SEQUENCE_SPEC 407 #define LINK_GCC_C_SEQUENCE_SPEC \ 408 "%G %{!nolibc:%L} " 409 410 /* ld64 supports a sysroot, it just has a different name and there's no easy 411 way to check for it at config time. */ 412 #undef HAVE_LD_SYSROOT 413 #define HAVE_LD_SYSROOT 1 414 /* It seems the only (working) way to get a space after %R is to append a 415 dangling '/'. */ 416 #define SYSROOT_SPEC "%{!isysroot*:-syslibroot %R/ } " 417 418 /* Do the same as clang, for now, and insert the sysroot for ld when an 419 isysroot is specified. */ 420 #define LINK_SYSROOT_SPEC "%{isysroot*:-syslibroot %*} " 421 422 /* Suppress the addition of extra prefix paths when a sysroot is in use. */ 423 #define STANDARD_STARTFILE_PREFIX_1 "" 424 #define STANDARD_STARTFILE_PREFIX_2 "" 425 426 427 /* Please keep the random linker options in alphabetical order. 428 Note that options taking arguments may appear multiple times on a command 429 line with different arguments each time, so put a * after their names so 430 all of them get passed. */ 431 #define LINK_SPEC \ 432 "%{static}%{!static:%{!dynamic:-dynamic}} \ 433 %:remove-outfile(-ldl) \ 434 %:remove-outfile(-lm) \ 435 %:remove-outfile(-lpthread) \ 436 %{fgnu-runtime: %{static|static-libgcc: \ 437 %:replace-outfile(-lobjc libobjc-gnu.a%s); \ 438 :%:replace-outfile(-lobjc -lobjc-gnu )}}\ 439 %{static|static-libgcc|static-libgfortran:%:replace-outfile(-lgfortran libgfortran.a%s)}\ 440 %{static|static-libgcc|static-libstdc++|static-libgfortran:%:replace-outfile(-lgomp libgomp.a%s)}\ 441 %{static|static-libgcc|static-libstdc++:%:replace-outfile(-lstdc++ libstdc++.a%s)}\ 442 %{force_cpusubtype_ALL:-arch %(darwin_arch)} \ 443 %{!force_cpusubtype_ALL:-arch %(darwin_subarch)} "\ 444 LINK_SYSROOT_SPEC \ 445 "%{mmacosx-version-min=*:-macosx_version_min %*} \ 446 %{!multiply_defined*:%{shared-libgcc: \ 447 %:version-compare(< 10.5 mmacosx-version-min= -multiply_defined) \ 448 %:version-compare(< 10.5 mmacosx-version-min= suppress) }} \ 449 %{sectalign*} %{sectcreate*} %{sectobjectsymbols*} %{sectorder*} \ 450 %{segaddr*} %{segcreate*} %{segprot*} " 451 452 /* Machine dependent libraries. */ 453 454 #define LIB_SPEC "%{!static:-lSystem}" 455 456 /* 457 Note that by default, -lgcc_eh is not linked against. 458 This is because,in general, we need to unwind through system libraries that 459 are linked with the shared unwinder in libunwind (or libgcc_s for 10.4/5). 460 461 For -static-libgcc: < 10.6, use the unwinder in libgcc_eh (and find 462 the emultls impl. there too). 463 464 For -static-libgcc: >= 10.6, the unwinder *still* comes from libSystem and 465 we find the emutls impl from lemutls_w. In either case, the builtins etc. 466 are linked from -lgcc. 467 468 When we have specified shared-libgcc or any case that might require 469 exceptions, we pull the libgcc content (including emulated tls) from 470 -lgcc_s.1 in GCC and the unwinder from /usr/lib/libgcc_s.1 for < 10.6 and 471 libSystem for >= 10.6 respectively. 472 Otherwise, we just link the emutls/builtins from convenience libs. 473 474 If we need exceptions, prior to 10.3.9, then we have to link the static 475 eh lib, since there's no shared version on the system. 476 477 In all cases, libgcc_s.1 will be installed with the compiler, or any app 478 built using it, so we can link the builtins and emutls shared on all. 479 480 We have to work around that DYLD_XXXX are disabled in macOS 10.11+ which 481 means that any bootstrap trying to use a shared libgcc with a bumped SO- 482 name will fail. This means that we do not accept shared libgcc for these 483 versions. 484 485 For -static-libgcc: >= 10.6, the unwinder *still* comes from libSystem and 486 we find the emutls impl from lemutls_w. In either case, the builtins etc. 487 are linked from -lgcc. 488 > 489 Otherwise, we just link the shared version of gcc_s.1.1 and pick up 490 exceptions: 491 * Prior to 10.3.9, then we have to link the static eh lib, since there 492 is no shared version on the system. 493 * from 10.3.9 to 10.5, from /usr/lib/libgcc_s.1.dylib 494 * from 10.6 onwards, from libSystem.dylib 495 496 In all cases, libgcc_s.1.1 will be installed with the compiler, or any app 497 built using it, so we can link the builtins and emutls shared on all. 498 */ 499 #undef REAL_LIBGCC_SPEC 500 #define REAL_LIBGCC_SPEC \ 501 "%{static-libgcc|static: \ 502 %:version-compare(!> 10.6 mmacosx-version-min= -lgcc_eh) \ 503 %:version-compare(>= 10.6 mmacosx-version-min= -lemutls_w); \ 504 shared-libgcc|fexceptions|fobjc-exceptions|fgnu-runtime: \ 505 %:version-compare(!> 10.11 mmacosx-version-min= -lgcc_s.1.1) \ 506 %:version-compare(>= 10.11 mmacosx-version-min= -lemutls_w) \ 507 %:version-compare(!> 10.3.9 mmacosx-version-min= -lgcc_eh) \ 508 %:version-compare(>< 10.3.9 10.5 mmacosx-version-min= -lgcc_s.10.4) \ 509 %:version-compare(>< 10.5 10.6 mmacosx-version-min= -lgcc_s.10.5); \ 510 : -lemutls_w \ 511 } -lgcc " 512 513 /* We specify crt0.o as -lcrt0.o so that ld will search the library path. */ 514 515 #undef STARTFILE_SPEC 516 #define STARTFILE_SPEC \ 517 "%{dynamiclib: %(darwin_dylib1) %{fgnu-tm: -lcrttms.o}} \ 518 %{!dynamiclib:%{bundle:%(darwin_bundle1)} \ 519 %{!bundle:%{pg:%{static:-lgcrt0.o} \ 520 %{!static:%{object:-lgcrt0.o} \ 521 %{!object:%{preload:-lgcrt0.o} \ 522 %{!preload:-lgcrt1.o \ 523 %:version-compare(>= 10.8 mmacosx-version-min= -no_new_main) \ 524 %(darwin_crt2)}}}} \ 525 %{!pg:%{static:-lcrt0.o} \ 526 %{!static:%{object:-lcrt0.o} \ 527 %{!object:%{preload:-lcrt0.o} \ 528 %{!preload: %(darwin_crt1) \ 529 %(darwin_crt2)}}}}}} \ 530 %(darwin_crt3) %<dynamiclib " 531 532 /* We want a destructor last in the list. */ 533 #define TM_DESTRUCTOR "%{fgnu-tm: -lcrttme.o}" 534 #define ENDFILE_SPEC TM_DESTRUCTOR 535 536 #define DARWIN_EXTRA_SPECS \ 537 { "darwin_crt1", DARWIN_CRT1_SPEC }, \ 538 { "darwin_crt2", DARWIN_CRT2_SPEC }, \ 539 { "darwin_crt3", DARWIN_CRT3_SPEC }, \ 540 { "darwin_dylib1", DARWIN_DYLIB1_SPEC }, \ 541 { "darwin_bundle1", DARWIN_BUNDLE1_SPEC }, 542 543 #define DARWIN_CRT1_SPEC \ 544 "%:version-compare(!> 10.5 mmacosx-version-min= -lcrt1.o) \ 545 %:version-compare(>< 10.5 10.6 mmacosx-version-min= -lcrt1.10.5.o) \ 546 %:version-compare(>< 10.6 10.8 mmacosx-version-min= -lcrt1.10.6.o) \ 547 %{fgnu-tm: -lcrttms.o}" 548 549 #define DARWIN_CRT2_SPEC "" 550 551 /* crt3.o provides __cxa_atexit on systems that don't have it (and a fix 552 up for faulty versions on 10.4). Since it's only used with C++, which 553 requires passing -shared-libgcc, key off that to avoid unnecessarily 554 adding a destructor to every program built for 10.4 or earlier. */ 555 556 #define DARWIN_CRT3_SPEC \ 557 "%{shared-libgcc:%:version-compare(< 10.5 mmacosx-version-min= crt3.o%s)}" 558 559 #define DARWIN_DYLIB1_SPEC \ 560 "%:version-compare(!> 10.5 mmacosx-version-min= -ldylib1.o) \ 561 %:version-compare(>< 10.5 10.6 mmacosx-version-min= -ldylib1.10.5.o)" 562 563 #define DARWIN_BUNDLE1_SPEC \ 564 "%{!static:%:version-compare(< 10.6 mmacosx-version-min= -lbundle1.o) \ 565 %{fgnu-tm: -lcrttms.o}}" 566 567 #ifdef HAVE_AS_MMACOSX_VERSION_MIN_OPTION 568 /* Emit macosx version (but only major). */ 569 #define ASM_MMACOSX_VERSION_MIN_SPEC \ 570 "%{asm_macosx_version_min=*: -mmacosx-version-min=%* } \ 571 %<asm_macosx_version_min=* " 572 #else 573 #define ASM_MMACOSX_VERSION_MIN_SPEC " %<asm_macosx_version_min=* " 574 #endif 575 576 #if HAVE_GNU_AS 577 /* The options are added in gcc.c for this case. */ 578 #define ASM_OPTIONS "" 579 #else 580 /* When we detect that we're cctools or llvm as, we need to insert the right 581 additional options. Actually, currently these are the same as GAS. */ 582 #define ASM_OPTIONS "%{v} %{w:-W} %{I*}" 583 #endif 584 585 /* Default Darwin ASM_SPEC, very simple. */ 586 #define ASM_SPEC \ 587 "%{static} -arch %(darwin_arch) " \ 588 ASM_OPTIONS ASM_MMACOSX_VERSION_MIN_SPEC 589 590 #ifdef HAVE_AS_STABS_DIRECTIVE 591 /* We only pass a debug option to the assembler if that supports stabs, since 592 dwarf is not uniformly supported in the assemblers. */ 593 #define ASM_DEBUG_SPEC "%{g*:%{%:debug-level-gt(0):%{!gdwarf*:--gstabs}}}" 594 #else 595 #define ASM_DEBUG_SPEC "" 596 #endif 597 598 #undef ASM_DEBUG_OPTION_SPEC 599 #define ASM_DEBUG_OPTION_SPEC "" 600 601 #define ASM_FINAL_SPEC \ 602 "%{gsplit-dwarf:%ngsplit-dwarf is not supported on this platform} \ 603 %<gsplit-dwarf" 604 605 /* Since we bootstrap with C++ toolchains realistically require DWARF-2, even 606 if stabs is supported by the assembler. */ 607 608 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG 609 #define DARWIN_PREFER_DWARF 610 #define DWARF2_DEBUGGING_INFO 1 611 612 #ifdef HAVE_AS_STABS_DIRECTIVE 613 #define DBX_DEBUGGING_INFO 1 614 #endif 615 616 #define DEBUG_FRAME_SECTION "__DWARF,__debug_frame,regular,debug" 617 #define DEBUG_INFO_SECTION "__DWARF,__debug_info,regular,debug" 618 #define DEBUG_ABBREV_SECTION "__DWARF,__debug_abbrev,regular,debug" 619 #define DEBUG_ARANGES_SECTION "__DWARF,__debug_aranges,regular,debug" 620 #define DEBUG_MACINFO_SECTION "__DWARF,__debug_macinfo,regular,debug" 621 #define DEBUG_LINE_SECTION "__DWARF,__debug_line,regular,debug" 622 #define DEBUG_LOC_SECTION "__DWARF,__debug_loc,regular,debug" 623 #define DEBUG_LOCLISTS_SECTION "__DWARF,__debug_loclists,regular,debug" 624 625 #define DEBUG_STR_SECTION "__DWARF,__debug_str,regular,debug" 626 #define DEBUG_STR_OFFSETS_SECTION "__DWARF,__debug_str_offs,regular,debug" 627 #define DEBUG_RANGES_SECTION "__DWARF,__debug_ranges,regular,debug" 628 #define DEBUG_RNGLISTS_SECTION "__DWARF,__debug_rnglists,regular,debug" 629 #define DEBUG_MACRO_SECTION "__DWARF,__debug_macro,regular,debug" 630 631 #define DEBUG_LTO_INFO_SECTION "__GNU_DWARF_LTO,__debug_info,regular,debug" 632 #define DEBUG_LTO_ABBREV_SECTION "__GNU_DWARF_LTO,__debug_abbrev,regular,debug" 633 #define DEBUG_LTO_MACINFO_SECTION "__GNU_DWARF_LTO,__debug_macinfo,regular,debug" 634 #define DEBUG_LTO_LINE_SECTION "__GNU_DWARF_LTO,__debug_line,regular,debug" 635 #define DEBUG_LTO_STR_SECTION "__GNU_DWARF_LTO,__debug_str,regular,debug" 636 #define DEBUG_LTO_MACRO_SECTION "__GNU_DWARF_LTO,__debug_macro,regular,debug" 637 638 #define TARGET_WANT_DEBUG_PUB_SECTIONS true 639 #define DEBUG_PUBNAMES_SECTION ((debug_generate_pub_sections == 2) \ 640 ? "__DWARF,__debug_gnu_pubn,regular,debug" \ 641 : "__DWARF,__debug_pubnames,regular,debug") 642 643 #define DEBUG_PUBTYPES_SECTION ((debug_generate_pub_sections == 2) \ 644 ? "__DWARF,__debug_gnu_pubt,regular,debug" \ 645 : "__DWARF,__debug_pubtypes,regular,debug") 646 647 /* When generating stabs debugging, use N_BINCL entries. */ 648 649 #define DBX_USE_BINCL 650 651 /* There is no limit to the length of stabs strings. */ 652 653 #define DBX_CONTIN_LENGTH 0 654 655 /* gdb needs a null N_SO at the end of each file for scattered loading. */ 656 657 #define DBX_OUTPUT_NULL_N_SO_AT_MAIN_SOURCE_FILE_END 658 659 /* GCC's definition of 'one_only' is the same as its definition of 'weak'. */ 660 #define MAKE_DECL_ONE_ONLY(DECL) (DECL_WEAK (DECL) = 1) 661 662 /* Mach-O supports 'weak imports', and 'weak definitions' in coalesced 663 sections. machopic_select_section ensures that weak variables go in 664 coalesced sections. Weak aliases (or any other kind of aliases) are 665 not supported. Weak symbols that aren't visible outside the .s file 666 are not supported. */ 667 #define ASM_WEAKEN_DECL(FILE, DECL, NAME, ALIAS) \ 668 do { \ 669 if (ALIAS) \ 670 { \ 671 warning (0, "alias definitions not supported in Mach-O; ignored"); \ 672 break; \ 673 } \ 674 \ 675 if (! DECL_EXTERNAL (DECL) && TREE_PUBLIC (DECL)) \ 676 targetm.asm_out.globalize_label (FILE, NAME); \ 677 if (DECL_EXTERNAL (DECL)) \ 678 fputs ("\t.weak_reference ", FILE); \ 679 else if (lookup_attribute ("weak_import", DECL_ATTRIBUTES (DECL))) \ 680 break; \ 681 else if (TREE_PUBLIC (DECL)) \ 682 fputs ("\t.weak_definition ", FILE); \ 683 else \ 684 break; \ 685 assemble_name (FILE, NAME); \ 686 fputc ('\n', FILE); \ 687 } while (0) 688 689 /* Darwin has the pthread routines in libSystem, which every program 690 links to, so there's no need for weak-ness for that. */ 691 #define GTHREAD_USE_WEAK 0 692 693 /* On Darwin, we don't (at the time of writing) have linkonce sections 694 with names, so it's safe to make the class data not comdat. */ 695 #define TARGET_CXX_CLASS_DATA_ALWAYS_COMDAT hook_bool_void_false 696 697 /* For efficiency, on Darwin the RTTI information that is always 698 emitted in the standard C++ library should not be COMDAT. */ 699 #define TARGET_CXX_LIBRARY_RTTI_COMDAT hook_bool_void_false 700 701 /* We make exception information linkonce. */ 702 #undef TARGET_USES_WEAK_UNWIND_INFO 703 #define TARGET_USES_WEAK_UNWIND_INFO 1 704 705 /* We need to use a nonlocal label for the start of an EH frame: the 706 Darwin linker requires that a coalesced section start with a label. 707 Unfortunately, it also requires that 'debug' sections don't contain 708 labels. */ 709 #undef FRAME_BEGIN_LABEL 710 #define FRAME_BEGIN_LABEL (for_eh ? "EH_frame" : "Lframe") 711 712 /* Emit a label for the FDE corresponding to DECL. EMPTY means 713 emit a label for an empty FDE. */ 714 #define TARGET_ASM_EMIT_UNWIND_LABEL darwin_emit_unwind_label 715 716 /* Emit a label to separate the exception table. */ 717 #define TARGET_ASM_EMIT_EXCEPT_TABLE_LABEL darwin_emit_except_table_label 718 719 /* Some of Darwin's unwinders need current frame address state to be reset 720 after a DW_CFA_restore_state recovers the register values. */ 721 #undef TARGET_ASM_SHOULD_RESTORE_CFA_STATE 722 #define TARGET_ASM_SHOULD_RESTORE_CFA_STATE darwin_should_restore_cfa_state 723 724 /* Our profiling scheme doesn't LP labels and counter words. */ 725 726 #define NO_PROFILE_COUNTERS 1 727 728 #undef INIT_SECTION_ASM_OP 729 #define INIT_SECTION_ASM_OP "" 730 731 #undef INVOKE__main 732 733 #define TARGET_ASM_CONSTRUCTOR machopic_asm_out_constructor 734 #define TARGET_ASM_DESTRUCTOR machopic_asm_out_destructor 735 736 /* Always prefix with an underscore. */ 737 738 #define USER_LABEL_PREFIX "_" 739 740 /* A dummy symbol that will be replaced with the function base name. */ 741 #define MACHOPIC_FUNCTION_BASE_NAME "<pic base>" 742 743 /* Don't output a .file directive. That is only used by the assembler for 744 error reporting. */ 745 #undef TARGET_ASM_FILE_START_FILE_DIRECTIVE 746 #define TARGET_ASM_FILE_START_FILE_DIRECTIVE false 747 748 #undef TARGET_ASM_FILE_END 749 #define TARGET_ASM_FILE_END darwin_file_end 750 751 /* Because Mach-O relocations have a counter from 1 to 255 for the 752 section number they apply to, it is necessary to output all 753 normal sections before the LTO sections, to make sure that the 754 sections that may have relocations always have a section number 755 smaller than 255. */ 756 #undef TARGET_ASM_LTO_START 757 #define TARGET_ASM_LTO_START darwin_asm_lto_start 758 #undef TARGET_ASM_LTO_END 759 #define TARGET_ASM_LTO_END darwin_asm_lto_end 760 761 #define ASM_OUTPUT_SKIP(FILE,SIZE) \ 762 fprintf (FILE, "\t.space " HOST_WIDE_INT_PRINT_UNSIGNED"\n", SIZE) 763 764 /* Give ObjC methods pretty symbol names. */ 765 766 #undef OBJC_GEN_METHOD_LABEL 767 #define OBJC_GEN_METHOD_LABEL(BUF,IS_INST,CLASS_NAME,CAT_NAME,SEL_NAME,NUM) \ 768 do { if (CAT_NAME) \ 769 sprintf (BUF, "%c[%s(%s) %s]", (IS_INST) ? '-' : '+', \ 770 (CLASS_NAME), (CAT_NAME), (SEL_NAME)); \ 771 else \ 772 sprintf (BUF, "%c[%s %s]", (IS_INST) ? '-' : '+', \ 773 (CLASS_NAME), (SEL_NAME)); \ 774 } while (0) 775 776 #undef ASM_DECLARE_OBJECT_NAME 777 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL) \ 778 darwin_asm_declare_object_name ((FILE), (NAME), (DECL)) 779 780 /* The RTTI data (e.g., __ti4name) is common and public (and static), 781 but it does need to be referenced via indirect PIC data pointers. 782 The machopic_define_symbol calls are telling the machopic subsystem 783 that the name *is* defined in this module, so it doesn't need to 784 make them indirect. */ 785 786 #undef ASM_DECLARE_FUNCTION_NAME 787 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \ 788 do { \ 789 const char *xname = NAME; \ 790 if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF) \ 791 xname = IDENTIFIER_POINTER (DECL_NAME (DECL)); \ 792 if (! DECL_WEAK (DECL) \ 793 && ((TREE_STATIC (DECL) \ 794 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \ 795 || DECL_INITIAL (DECL))) \ 796 machopic_define_symbol (DECL_RTL (DECL)); \ 797 if ((TREE_STATIC (DECL) \ 798 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \ 799 || DECL_INITIAL (DECL)) \ 800 (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false); \ 801 ASM_OUTPUT_FUNCTION_LABEL (FILE, xname, DECL); \ 802 } while (0) 803 804 #undef TARGET_ASM_DECLARE_CONSTANT_NAME 805 #define TARGET_ASM_DECLARE_CONSTANT_NAME darwin_asm_declare_constant_name 806 807 /* Wrap new method names in quotes so the assembler doesn't gag. 808 Make Objective-C internal symbols local and in doing this, we need 809 to accommodate the name mangling done by c++ on file scope locals. */ 810 811 int darwin_label_is_anonymous_local_objc_name (const char *name); 812 813 #undef ASM_OUTPUT_LABELREF 814 #define ASM_OUTPUT_LABELREF(FILE,NAME) \ 815 do { \ 816 const char *xname = (NAME); \ 817 if (! strcmp (xname, MACHOPIC_FUNCTION_BASE_NAME)) \ 818 machopic_output_function_base_name(FILE); \ 819 else if (xname[0] == '&' || xname[0] == '*') \ 820 { \ 821 int len = strlen (xname); \ 822 if (len > 6 && !strcmp ("$stub", xname + len - 5)) \ 823 machopic_validate_stub_or_non_lazy_ptr (xname); \ 824 else if (len > 7 && !strcmp ("$stub\"", xname + len - 6)) \ 825 machopic_validate_stub_or_non_lazy_ptr (xname); \ 826 else if (len > 14 && !strcmp ("$non_lazy_ptr", xname + len - 13)) \ 827 machopic_validate_stub_or_non_lazy_ptr (xname); \ 828 else if (len > 15 && !strcmp ("$non_lazy_ptr\"", xname + len - 14)) \ 829 machopic_validate_stub_or_non_lazy_ptr (xname); \ 830 if (xname[1] != '"' && name_needs_quotes (&xname[1])) \ 831 fprintf (FILE, "\"%s\"", &xname[1]); \ 832 else \ 833 fputs (&xname[1], FILE); \ 834 } \ 835 else if (xname[0] == '+' || xname[0] == '-') \ 836 fprintf (FILE, "\"%s\"", xname); \ 837 else if (darwin_label_is_anonymous_local_objc_name (xname)) \ 838 fprintf (FILE, "L%s", xname); \ 839 else if (xname[0] != '"' && name_needs_quotes (xname)) \ 840 asm_fprintf (FILE, "\"%U%s\"", xname); \ 841 else \ 842 asm_fprintf (FILE, "%U%s", xname); \ 843 } while (0) 844 845 /* Output before executable code. */ 846 #undef TEXT_SECTION_ASM_OP 847 #define TEXT_SECTION_ASM_OP "\t.text" 848 849 /* Output before writable data. */ 850 851 #undef DATA_SECTION_ASM_OP 852 #define DATA_SECTION_ASM_OP "\t.data" 853 854 #undef ALIGN_ASM_OP 855 #define ALIGN_ASM_OP ".align" 856 857 #undef ASM_OUTPUT_ALIGN 858 #define ASM_OUTPUT_ALIGN(FILE,LOG) \ 859 if ((LOG) != 0) \ 860 fprintf (FILE, "\t%s\t%d\n", ALIGN_ASM_OP, (LOG)) 861 862 /* The maximum alignment which the object file format can support in 863 bits. For Mach-O, this is 2^15 bytes. */ 864 865 #undef MAX_OFILE_ALIGNMENT 866 #define MAX_OFILE_ALIGNMENT (0x8000 * 8) 867 868 #define L2_MAX_OFILE_ALIGNMENT 15 869 870 /* These are the three variants that emit referenced blank space. */ 871 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \ 872 darwin_output_aligned_bss ((FILE), (DECL), (NAME), (SIZE), (ALIGN)) 873 874 #undef ASM_OUTPUT_ALIGNED_DECL_LOCAL 875 #define ASM_OUTPUT_ALIGNED_DECL_LOCAL(FILE, DECL, NAME, SIZE, ALIGN) \ 876 darwin_asm_output_aligned_decl_local \ 877 ((FILE), (DECL), (NAME), (SIZE), (ALIGN)) 878 879 #undef ASM_OUTPUT_ALIGNED_DECL_COMMON 880 #define ASM_OUTPUT_ALIGNED_DECL_COMMON(FILE, DECL, NAME, SIZE, ALIGN) \ 881 darwin_asm_output_aligned_decl_common \ 882 ((FILE), (DECL), (NAME), (SIZE), (ALIGN)) 883 884 /* The generic version, archs should over-ride where required. */ 885 #define MACHOPIC_NL_SYMBOL_PTR_SECTION ".non_lazy_symbol_pointer" 886 887 /* Declare the section variables. */ 888 #ifndef USED_FOR_TARGET 889 enum darwin_section_enum { 890 #define DEF_SECTION(NAME, FLAGS, DIRECTIVE, OBJC) NAME, 891 #include "darwin-sections.def" 892 #undef DEF_SECTION 893 NUM_DARWIN_SECTIONS 894 }; 895 extern GTY(()) section * darwin_sections[NUM_DARWIN_SECTIONS]; 896 #endif 897 898 #undef TARGET_ASM_SELECT_SECTION 899 #define TARGET_ASM_SELECT_SECTION machopic_select_section 900 901 #undef TARGET_ASM_FUNCTION_SECTION 902 #define TARGET_ASM_FUNCTION_SECTION darwin_function_section 903 904 #undef TARGET_ASM_SELECT_RTX_SECTION 905 #define TARGET_ASM_SELECT_RTX_SECTION machopic_select_rtx_section 906 #undef TARGET_ASM_UNIQUE_SECTION 907 #define TARGET_ASM_UNIQUE_SECTION darwin_unique_section 908 #undef TARGET_ASM_FUNCTION_RODATA_SECTION 909 #define TARGET_ASM_FUNCTION_RODATA_SECTION default_no_function_rodata_section 910 911 #undef TARGET_ASM_TM_CLONE_TABLE_SECTION 912 #define TARGET_ASM_TM_CLONE_TABLE_SECTION darwin_tm_clone_table_section 913 914 #undef TARGET_ASM_RELOC_RW_MASK 915 #define TARGET_ASM_RELOC_RW_MASK machopic_reloc_rw_mask 916 917 /* Globalizing directive for a label. */ 918 #define GLOBAL_ASM_OP "\t.globl " 919 #define TARGET_ASM_GLOBALIZE_LABEL darwin_globalize_label 920 921 /* Emit an assembler directive to set visibility for a symbol. Used 922 to support visibility attribute and Darwin's private extern 923 feature. */ 924 #undef TARGET_ASM_ASSEMBLE_VISIBILITY 925 #define TARGET_ASM_ASSEMBLE_VISIBILITY darwin_assemble_visibility 926 927 /* Extra attributes for Darwin. */ 928 #define SUBTARGET_ATTRIBUTE_TABLE \ 929 /* { name, min_len, max_len, decl_req, type_req, fn_type_req, \ 930 affects_type_identity, handler, exclude } */ \ 931 { "apple_kext_compatibility", 0, 0, false, true, false, false, \ 932 darwin_handle_kext_attribute, NULL }, \ 933 { "weak_import", 0, 0, true, false, false, false, \ 934 darwin_handle_weak_import_attribute, NULL } 935 936 /* Make local constant labels linker-visible, so that if one follows a 937 weak_global constant, ld64 will be able to separate the atoms. */ 938 #undef ASM_GENERATE_INTERNAL_LABEL 939 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM) \ 940 do { \ 941 if (strcmp ("LC", PREFIX) == 0) \ 942 sprintf (LABEL, "*%s%ld", "lC", (long)(NUM)); \ 943 else if (strcmp ("Lubsan_data", PREFIX) == 0) \ 944 sprintf (LABEL, "*%s%ld", "lubsan_data", (long)(NUM));\ 945 else if (strcmp ("Lubsan_type", PREFIX) == 0) \ 946 sprintf (LABEL, "*%s%ld", "lubsan_type", (long)(NUM));\ 947 else if (strcmp ("LASAN", PREFIX) == 0) \ 948 sprintf (LABEL, "*%s%ld", "lASAN", (long)(NUM));\ 949 else if (strcmp ("LTRAMP", PREFIX) == 0) \ 950 sprintf (LABEL, "*%s%ld", "lTRAMP", (long)(NUM));\ 951 else \ 952 sprintf (LABEL, "*%s%ld", PREFIX, (long)(NUM)); \ 953 } while (0) 954 955 #undef TARGET_ASM_MARK_DECL_PRESERVED 956 #define TARGET_ASM_MARK_DECL_PRESERVED darwin_mark_decl_preserved 957 958 /* Any port using this header needs to define the first available 959 subtarget symbol bit: SYMBOL_FLAG_SUBT_DEP. */ 960 961 /* Is a variable. */ 962 #define MACHO_SYMBOL_FLAG_VARIABLE (SYMBOL_FLAG_SUBT_DEP) 963 #define MACHO_SYMBOL_VARIABLE_P(RTX) \ 964 ((SYMBOL_REF_FLAGS (RTX) & MACHO_SYMBOL_FLAG_VARIABLE) != 0) 965 966 /* Set on a symbol that must be indirected, even when there is a 967 definition in the TU. The ABI mandates that common symbols are so 968 indirected, as are weak. If 'fix-and-continue' is operational then 969 data symbols might also be. */ 970 971 #define MACHO_SYMBOL_FLAG_MUST_INDIRECT ((SYMBOL_FLAG_SUBT_DEP) << 1) 972 #define MACHO_SYMBOL_MUST_INDIRECT_P(RTX) \ 973 ((SYMBOL_REF_FLAGS (RTX) & MACHO_SYMBOL_FLAG_MUST_INDIRECT) != 0) 974 975 /* Set on a symbol with SYMBOL_FLAG_FUNCTION or MACHO_SYMBOL_FLAG_VARIABLE 976 to indicate that the function or variable is considered defined in this 977 translation unit. */ 978 979 #define MACHO_SYMBOL_FLAG_DEFINED ((SYMBOL_FLAG_SUBT_DEP) << 2) 980 #define MACHO_SYMBOL_DEFINED_P(RTX) \ 981 ((SYMBOL_REF_FLAGS (RTX) & MACHO_SYMBOL_FLAG_DEFINED) != 0) 982 983 /* Set on a symbol that has specified non-default visibility. */ 984 985 #define MACHO_SYMBOL_FLAG_HIDDEN_VIS ((SYMBOL_FLAG_SUBT_DEP) << 3) 986 #define MACHO_SYMBOL_HIDDEN_VIS_P(RTX) \ 987 ((SYMBOL_REF_FLAGS (RTX) & MACHO_SYMBOL_FLAG_HIDDEN_VIS) != 0) 988 989 /* Set on a symbol that should be made visible to the linker (overriding 990 'L' symbol prefixes). */ 991 992 #define MACHO_SYMBOL_FLAG_LINKER_VIS ((SYMBOL_FLAG_SUBT_DEP) << 4) 993 #define MACHO_SYMBOL_LINKER_VIS_P(RTX) \ 994 ((SYMBOL_REF_FLAGS (RTX) & MACHO_SYMBOL_FLAG_LINKER_VIS) != 0) 995 996 /* Set on a symbol that is a pic stub or symbol indirection (i.e. the 997 L_xxxxx${stub,non_lazy_ptr,lazy_ptr}. */ 998 999 #define MACHO_SYMBOL_FLAG_INDIRECTION ((SYMBOL_FLAG_SUBT_DEP) << 5) 1000 #define MACHO_SYMBOL_INDIRECTION_P(RTX) \ 1001 ((SYMBOL_REF_FLAGS (RTX) & MACHO_SYMBOL_FLAG_INDIRECTION) != 0) 1002 1003 /* Set on a symbol to indicate when fix-and-continue style code 1004 generation is being used and the symbol refers to a static symbol 1005 that should be rebound from new instances of a translation unit to 1006 the original instance of the data. */ 1007 1008 #define MACHO_SYMBOL_FLAG_STATIC ((SYMBOL_FLAG_SUBT_DEP) << 6) 1009 #define MACHO_SYMBOL_STATIC_P(RTX) \ 1010 ((SYMBOL_REF_FLAGS (RTX) & MACHO_SYMBOL_FLAG_STATIC) != 0) 1011 1012 /* Symbolic names for various things we might know about a symbol. */ 1013 1014 enum machopic_addr_class { 1015 MACHOPIC_UNDEFINED, 1016 MACHOPIC_DEFINED_DATA, 1017 MACHOPIC_UNDEFINED_DATA, 1018 MACHOPIC_DEFINED_FUNCTION, 1019 MACHOPIC_UNDEFINED_FUNCTION 1020 }; 1021 1022 /* Macros defining the various PIC cases. */ 1023 1024 #undef MACHO_DYNAMIC_NO_PIC_P 1025 #define MACHO_DYNAMIC_NO_PIC_P (TARGET_MACHO_DYNAMIC_NO_PIC) 1026 #undef MACHOPIC_INDIRECT 1027 #define MACHOPIC_INDIRECT (flag_pic || MACHO_DYNAMIC_NO_PIC_P) 1028 #define MACHOPIC_JUST_INDIRECT (MACHO_DYNAMIC_NO_PIC_P) 1029 #undef MACHOPIC_PURE 1030 #define MACHOPIC_PURE (flag_pic && ! MACHO_DYNAMIC_NO_PIC_P) 1031 1032 #undef TARGET_ENCODE_SECTION_INFO 1033 #define TARGET_ENCODE_SECTION_INFO darwin_encode_section_info 1034 #undef TARGET_STRIP_NAME_ENCODING 1035 #define TARGET_STRIP_NAME_ENCODING default_strip_name_encoding 1036 1037 #define GEN_BINDER_NAME_FOR_STUB(BUF,STUB,STUB_LENGTH) \ 1038 do { \ 1039 const char *const stub_ = (STUB); \ 1040 char *buffer_ = (BUF); \ 1041 strcpy (buffer_, stub_); \ 1042 if (stub_[0] == '"') \ 1043 { \ 1044 strcpy (buffer_ + (STUB_LENGTH) - 1, "_binder\""); \ 1045 } \ 1046 else \ 1047 { \ 1048 strcpy (buffer_ + (STUB_LENGTH), "_binder"); \ 1049 } \ 1050 } while (0) 1051 1052 #define GEN_SYMBOL_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH) \ 1053 do { \ 1054 const char *const symbol_ = (SYMBOL); \ 1055 char *buffer_ = (BUF); \ 1056 if (name_needs_quotes (symbol_) && symbol_[0] != '"') \ 1057 { \ 1058 sprintf (buffer_, "\"%s\"", symbol_); \ 1059 } \ 1060 else \ 1061 { \ 1062 strcpy (buffer_, symbol_); \ 1063 } \ 1064 } while (0) 1065 1066 /* Given a symbol name string, create the lazy pointer version 1067 of the symbol name. */ 1068 1069 #define GEN_LAZY_PTR_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH) \ 1070 do { \ 1071 const char *symbol_ = (SYMBOL); \ 1072 char *buffer_ = (BUF); \ 1073 if (symbol_[0] == '"') \ 1074 { \ 1075 strcpy (buffer_, "\"L"); \ 1076 strcpy (buffer_ + 2, symbol_ + 1); \ 1077 strcpy (buffer_ + (SYMBOL_LENGTH), "$lazy_ptr\""); \ 1078 } \ 1079 else if (name_needs_quotes (symbol_)) \ 1080 { \ 1081 strcpy (buffer_, "\"L"); \ 1082 strcpy (buffer_ + 2, symbol_); \ 1083 strcpy (buffer_ + (SYMBOL_LENGTH) + 2, "$lazy_ptr\""); \ 1084 } \ 1085 else \ 1086 { \ 1087 strcpy (buffer_, "L"); \ 1088 strcpy (buffer_ + 1, symbol_); \ 1089 strcpy (buffer_ + (SYMBOL_LENGTH) + 1, "$lazy_ptr"); \ 1090 } \ 1091 } while (0) 1092 1093 #define EH_FRAME_SECTION_NAME "__TEXT" 1094 #define EH_FRAME_SECTION_ATTR ",coalesced,no_toc+strip_static_syms+live_support" 1095 1096 #undef ASM_PREFERRED_EH_DATA_FORMAT 1097 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL) \ 1098 (((CODE) == 2 && (GLOBAL) == 1) \ 1099 ? (DW_EH_PE_pcrel | DW_EH_PE_indirect | DW_EH_PE_sdata4) : \ 1100 ((CODE) == 1 || (GLOBAL) == 0) ? DW_EH_PE_pcrel : DW_EH_PE_absptr) 1101 1102 #define ASM_OUTPUT_DWARF_DELTA(FILE,SIZE,LABEL1,LABEL2) \ 1103 darwin_asm_output_dwarf_delta (FILE, SIZE, LABEL1, LABEL2, 0) 1104 1105 #define ASM_OUTPUT_DWARF_OFFSET(FILE,SIZE,LABEL,OFFSET,BASE) \ 1106 darwin_asm_output_dwarf_offset (FILE, SIZE, LABEL, OFFSET, BASE) 1107 1108 #define ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX(ASM_OUT_FILE, ENCODING, SIZE, ADDR, DONE) \ 1109 if (ENCODING == ASM_PREFERRED_EH_DATA_FORMAT (2, 1)) { \ 1110 darwin_non_lazy_pcrel (ASM_OUT_FILE, ADDR); \ 1111 goto DONE; \ 1112 } 1113 1114 /* Experimentally, putting jump tables in text is faster on SPEC. 1115 Also this is needed for correctness for coalesced functions. */ 1116 1117 #ifndef JUMP_TABLES_IN_TEXT_SECTION 1118 #define JUMP_TABLES_IN_TEXT_SECTION 1 1119 #endif 1120 1121 #define TARGET_TERMINATE_DW2_EH_FRAME_INFO false 1122 1123 #define TARGET_ASM_INIT_SECTIONS darwin_init_sections 1124 #undef TARGET_ASM_NAMED_SECTION 1125 #define TARGET_ASM_NAMED_SECTION darwin_asm_named_section 1126 1127 #define DARWIN_REGISTER_TARGET_PRAGMAS() \ 1128 do { \ 1129 if (!flag_preprocess_only) \ 1130 cpp_register_pragma (parse_in, NULL, "mark", \ 1131 darwin_pragma_ignore, false); \ 1132 c_register_pragma (0, "options", darwin_pragma_options); \ 1133 c_register_pragma (0, "segment", darwin_pragma_ignore); \ 1134 c_register_pragma (0, "unused", darwin_pragma_unused); \ 1135 c_register_pragma (0, "ms_struct", darwin_pragma_ms_struct); \ 1136 } while (0) 1137 1138 #undef ASM_APP_ON 1139 #define ASM_APP_ON "" 1140 #undef ASM_APP_OFF 1141 #define ASM_APP_OFF "" 1142 1143 void darwin_register_frameworks (const char *, const char *, int); 1144 void darwin_register_objc_includes (const char *, const char *, int); 1145 #define TARGET_EXTRA_PRE_INCLUDES darwin_register_objc_includes 1146 #define TARGET_EXTRA_INCLUDES darwin_register_frameworks 1147 1148 void add_framework_path (char *); 1149 #define TARGET_OPTF add_framework_path 1150 1151 #define TARGET_POSIX_IO 1152 1153 #define WINT_TYPE "int" 1154 1155 /* Every program on darwin links against libSystem which contains the pthread 1156 routines, so there's no need to explicitly call out when doing threaded 1157 work. */ 1158 1159 #undef GOMP_SELF_SPECS 1160 #define GOMP_SELF_SPECS "" 1161 #undef GTM_SELF_SPECS 1162 #define GTM_SELF_SPECS "" 1163 1164 /* Darwin disables section anchors by default. 1165 They should be enabled per arch where support exists in that arch. */ 1166 #define TARGET_ASM_OUTPUT_ANCHOR NULL 1167 #define DARWIN_SECTION_ANCHORS 0 1168 1169 #define HAVE_ENABLE_EXECUTE_STACK 1170 1171 /* For Apple KEXTs, we make the constructors return this to match gcc 1172 2.95. */ 1173 #define TARGET_CXX_CDTOR_RETURNS_THIS (darwin_kextabi_p) 1174 #define TARGET_KEXTABI flag_apple_kext 1175 1176 /* We have target-specific builtins. */ 1177 #define SUBTARGET_FOLD_BUILTIN darwin_fold_builtin 1178 1179 #define TARGET_N_FORMAT_TYPES 1 1180 #define TARGET_FORMAT_TYPES darwin_additional_format_types 1181 1182 #ifndef USED_FOR_TARGET 1183 extern void darwin_driver_init (unsigned int *,struct cl_decoded_option **); 1184 #define GCC_DRIVER_HOST_INITIALIZATION \ 1185 darwin_driver_init (&decoded_options_count, &decoded_options) 1186 #endif 1187 1188 /* The Apple assembler and linker do not support constructor priorities. */ 1189 #undef SUPPORTS_INIT_PRIORITY 1190 #define SUPPORTS_INIT_PRIORITY 0 1191 1192 #undef STACK_CHECK_STATIC_BUILTIN 1193 #define STACK_CHECK_STATIC_BUILTIN 1 1194 1195 /* When building cross-compilers (and native crosses) we shall default to 1196 providing an osx-version-min of this unless overridden by the User. 1197 10.5 is the only version that fully supports all our archs so that's the 1198 fall-back default. */ 1199 #ifndef DEF_MIN_OSX_VERSION 1200 #define DEF_MIN_OSX_VERSION "10.5" 1201 #endif 1202 1203 /* Later versions of ld64 support coalescing weak code/data without requiring 1204 that they be placed in specially identified sections. This is the earliest 1205 _tested_ version known to support this so far. */ 1206 #define MIN_LD64_NO_COAL_SECTS "236.3" 1207 1208 /* From at least version 62.1, ld64 can build symbol indirection stubs as 1209 needed, and there is no need for the compiler to emit them. */ 1210 #define MIN_LD64_OMIT_STUBS "62.1" 1211 1212 /* Emit start labels for init and term sections from this version. */ 1213 #define MIN_LD64_INIT_TERM_START_LABELS "136.0" 1214 1215 /* If we have no definition for the linker version, pick the minimum version 1216 that will bootstrap the compiler. */ 1217 #ifndef LD64_VERSION 1218 # ifndef DEF_LD64 1219 # define LD64_VERSION "85.2.1" 1220 # else 1221 # define LD64_VERSION DEF_LD64 1222 # endif 1223 #endif 1224 1225 #endif /* CONFIG_DARWIN_H */ 1226