gcc/config/darwin.h

   1 /* Target definitions for Darwin (Mac OS X) systems.
   2    Copyright (C) 1989-2022 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 #define OBJECT_FORMAT_MACHO 1
  47
  48 /* Suppress g++ attempt to link in the math library automatically. */
  49 #define MATH_LIBRARY ""
  50
  51 /* We have atexit.  */
  52
  53 #define HAVE_ATEXIT
  54
  55 /* Define an empty body for the function do_global_dtors() in libgcc2.c.  */
  56
  57 #define DO_GLOBAL_DTORS_BODY
  58
  59 /* Register static destructors to run from __cxa_atexit instead of putting
  60    them into a .mod_term_funcs section.  */
  61
  62 #define TARGET_DTORS_FROM_CXA_ATEXIT true
  63
  64 /* The string value for __SIZE_TYPE__.  */
  65
  66 #ifndef SIZE_TYPE
  67 #define SIZE_TYPE "long unsigned int"
  68 #endif
  69
  70 /* Type used for ptrdiff_t, as a string used in a declaration.  */
  71
  72 #undef  PTRDIFF_TYPE
  73 #define PTRDIFF_TYPE "int"
  74
  75 /* wchar_t is int.  */
  76
  77 #undef  WCHAR_TYPE
  78 #define WCHAR_TYPE "int"
  79 #undef  WCHAR_TYPE_SIZE
  80 #define WCHAR_TYPE_SIZE 32
  81
  82 #define INT8_TYPE "signed char"
  83 #define INT16_TYPE "short int"
  84 #define INT32_TYPE "int"
  85 #define INT64_TYPE "long long int"
  86 #define UINT8_TYPE "unsigned char"
  87 #define UINT16_TYPE "short unsigned int"
  88 #define UINT32_TYPE "unsigned int"
  89 #define UINT64_TYPE "long long unsigned int"
  90
  91 #define INT_LEAST8_TYPE "signed char"
  92 #define INT_LEAST16_TYPE "short int"
  93 #define INT_LEAST32_TYPE "int"
  94 #define INT_LEAST64_TYPE "long long int"
  95 #define UINT_LEAST8_TYPE "unsigned char"
  96 #define UINT_LEAST16_TYPE "short unsigned int"
  97 #define UINT_LEAST32_TYPE "unsigned int"
  98 #define UINT_LEAST64_TYPE "long long unsigned int"
  99
 100 #define INT_FAST8_TYPE "signed char"
 101 #define INT_FAST16_TYPE "short int"
 102 #define INT_FAST32_TYPE "int"
 103 #define INT_FAST64_TYPE "long long int"
 104 #define UINT_FAST8_TYPE "unsigned char"
 105 #define UINT_FAST16_TYPE "short unsigned int"
 106 #define UINT_FAST32_TYPE "unsigned int"
 107 #define UINT_FAST64_TYPE "long long unsigned int"
 108
 109 #define INTPTR_TYPE "long int"
 110 #define UINTPTR_TYPE "long unsigned int"
 111
 112 #define SIG_ATOMIC_TYPE "int"
 113
 114 /* Default to using the NeXT-style runtime, since that's what is
 115    pre-installed on Darwin systems.  */
 116
 117 #define NEXT_OBJC_RUNTIME 100508
 118
 119 /* Don't default to pcc-struct-return, because gcc is the only compiler, and
 120    we want to retain compatibility with older gcc versions.  */
 121
 122 #undef  DEFAULT_PCC_STRUCT_RETURN
 123 #define DEFAULT_PCC_STRUCT_RETURN 0
 124
 125 /* True if pragma ms_struct is in effect.  */
 126 extern GTY(()) int darwin_ms_struct;
 127
 128 /* Darwin has a user convenience feature where some linker options are exposed
 129    at the driver level (so one can type "-all_load" instead of "-Wl,-all_load"
 130    or "-Xlinker -all_load").  We retain this, but now these options are all
 131    marked as 'Driver' and we process them as early as possible so that they
 132    get allocated to the right toolchain command.  There are a couple of special
 133    cases where these driver opts are used multiple times, or to control
 134    operations on more than one command (e.g. dynamiclib).  These are handled
 135    specially and we then add %<xxxx specs for the commands that _don't_ need
 136    them.  NOTE: the order of 'shared' and 'dynamiclib' is significant, hence
 137    they are placed out of alphabetical order at the start.  Likewise, we keep
 138    a couple of cases where a negative option originally appeared after the
 139    positive alternate, potentially overriding it.
 140    When we report an error with %e, it seems necessary to strip the option
 141    before doing so, otherwise it survives to the cc1 command line (%e doesn't
 142    appear to abort the program before this).
 143    Right now there's no mechanism to split up the "variable portion" (%*) of
 144    the matched spec string, so where we have some driver specs that take 2
 145    or 3 arguments, these cannot be processed here, but are deferred until the
 146    LINK_SPEC, where they are copied verbatim.
 147    We have a "safe" version of the MacOS version string, that's been sanity-
 148    checked and truncated to minor version.  If the 'tiny' (3rd) portion of the
 149    value is not significant, it's better to use this in version-compare().  */
 150
 151 #undef SUBTARGET_DRIVER_SELF_SPECS
 152 #define SUBTARGET_DRIVER_SELF_SPECS                                     \
 153   "%{shared:%{!dynamiclib:-dynamiclib}} %<shared",                      \
 154   "%{static:%{dynamic|dynamiclib:%econflicting code generation switches}}",\
 155   "%{dynamiclib:-Xlinker -dylib \
 156      %{allowable_client*:-Xlinker -allowable_client -Xlinker %*} \
 157        %<allowable_client* \
 158      %{bundle_loader*: %<bundle_loader* \
 159        %e-bundle_loader not allowed with -dynamiclib} \
 160      %{client_name*: %<client_name* \
 161        %e-client_name not allowed with -dynamiclib} \
 162      %{compatibility_version*:\
 163        -Xlinker -dylib_compatibility_version -Xlinker %*} \
 164        %<compatibility_version* \
 165      %{current_version*:-Xlinker -dylib_current_version -Xlinker %*} \
 166        %<current_version* \
 167      %{install_name*:-Xlinker -dylib_install_name -Xlinker %* } \
 168        %<install_name* \
 169      %{keep_private_externs: %<keep_private_externs \
 170        %e-keep_private_externs not allowed with -dynamiclib} \
 171      %{private_bundle: %<private_bundle \
 172        %e-private_bundle not allowed with -dynamiclib} \
 173     }",                                                                 \
 174   "%{!dynamiclib: \
 175      %{bundle_loader*:-Xlinker -bundle_loader -Xlinker %*} \
 176        %<bundle_loader* \
 177      %{client_name*:-Xlinker -client_name -Xlinker %*} \
 178        %<client_name* \
 179      %{compatibility_version*: %<compatibility_version* \
 180        %e-compatibility_version only allowed with -dynamiclib} \
 181      %{current_version*: %<current_version* \
 182        %e-current_version only allowed with -dynamiclib} \
 183      %{install_name*: %<install_name* \
 184        %e-install_name only allowed with -dynamiclib} \
 185      %{keep_private_externs:-Xlinker -keep_private_externs} \
 186        %<keep_private_externs \
 187      %{private_bundle:-Xlinker -private_bundle} \
 188        %<private_bundle \
 189     }",                                                                 \
 190   "%{all_load:-Xlinker -all_load} %<all_load",                          \
 191   "%{arch_errors_fatal:-Xlinker -arch_errors_fatal} \
 192     %<arch_errors_fatal",                                               \
 193   "%{bind_at_load:-Xlinker -bind_at_load} %<bind_at_load",              \
 194   "%{bundle:%{!dynamiclib:-Xlinker -bundle; \
 195               :%e-bundle not allowed with -dynamiclib}}",       \
 196   "%{dead_strip:-Xlinker -dead_strip} %<dead_strip",                    \
 197   "%{dylib_file*:-Xlinker -dylib_file -Xlinker %*} %<dylib_file*",      \
 198   "%{dylinker:-Xlinker -dylinker} %<dylinker",                          \
 199   "%{dylinker_install_name*:-Xlinker -dylinker_install_name -Xlinker %*}\
 200     %<dylinker_install_name*",                                          \
 201   "%{exported_symbols_list*:-Xlinker -exported_symbols_list -Xlinker %*}\
 202     %<exported_symbols_list",                                           \
 203   "%{findirect-virtual-calls: -fapple-kext} %<findirect-virtual-calls", \
 204   "%{fterminated-vtables: -fapple-kext} %<fterminated-vtables",         \
 205   "%{fapple-kext|mkernel:-static}",                                     \
 206   "%{filelist*:-Xlinker -filelist -Xlinker %*} %<filelist*",            \
 207   "%{flat_namespace:-Xlinker -flat_namespace} %<flat_namespace",        \
 208   "%{force_cpusubtype_ALL:-Xassembler -force_cpusubtype_ALL} ",         \
 209   "%{force_flat_namespace: \
 210      %{!dynamiclib:-Xlinker -force_flat_namespace; \
 211        :%e-force_flat_namespace not allowed with -dynamiclib}} \
 212     %<force_flat_namespace",                                            \
 213   "%{framework*:-Xlinker -framework -Xlinker %*} %<framework*",         \
 214   "%{gfull:-g -fno-eliminate-unused-debug-symbols} %<gfull",            \
 215   "%{gused:-g -feliminate-unused-debug-symbols} %<gused",               \
 216   "%{gsplit-dwarf:%ngsplit-dwarf is not supported on this platform} \
 217     %<gsplit-dwarf",                                                    \
 218   "%{headerpad_max_install_names:-Xlinker -headerpad_max_install_names}\
 219     %<headerpad_max_install_names",                                     \
 220   "%{image_base*:-Xlinker -image_base -Xlinker %*} %<image_base*",      \
 221   "%{init*:-Xlinker -init -Xlinker %*} %<init*",                        \
 222   "%{multi_module:-Xlinker -multi_module} %<multi_module",              \
 223   "%{multiply_defined*:-Xlinker -multiply_defined -Xlinker %*; \
 224      :%{shared-libgcc: \
 225        %:version-compare(< 10.5 asm_macosx_version_min= -Xlinker) \
 226        %:version-compare(< 10.5 asm_macosx_version_min= -multiply_defined) \
 227        %:version-compare(< 10.5 asm_macosx_version_min= -Xlinker) \
 228        %:version-compare(< 10.5 asm_macosx_version_min= suppress)}} \
 229      %<multiply_defined*",                                              \
 230   "%{multiplydefinedunused*:\
 231      -Xlinker -multiply_defined_unused -Xlinker %*} \
 232      %<multiplydefinedunused* ",                                        \
 233   "%{no_dead_strip_inits_and_terms:\
 234      -Xlinker -no_dead_strip_inits_and_terms} \
 235      %<no_dead_strip_inits_and_terms",                                  \
 236   "%{nofixprebinding:-Xlinker -nofixprebinding} %<nofixprebinding",     \
 237   "%{nomultidefs:-Xlinker -nomultidefs} %<nomultidefs",                 \
 238   "%{pagezero_size*:-Xlinker -pagezero_size -Xlinker %*} \
 239     %<pagezero_size",                                                   \
 240   "%{prebind:-Xlinker -prebind} %<prebind",                             \
 241   "%{noprebind:-Xlinker -noprebind} %<noprebind",                       \
 242   "%{prebind_all_twolevel_modules:\
 243      -Xlinker -prebind_all_twolevel_modules} \
 244      %<prebind_all_twolevel_modules",                                   \
 245   "%{preload:-Xlinker -preload} %<preload",                             \
 246   "%{read_only_relocs*:-Xlinker -read_only_relocs -Xlinker %*} \
 247      %<read_only_relocs*",                                              \
 248   "%{rpath*: -Xlinker -rpath -Xlinker %*}",                             \
 249   "%{seg_addr_table_filename*: \
 250      -Xlinker -seg_addr_table_filename -Xlinker %*} \
 251      %<seg_addr_table_filename*",                                       \
 252   "%{seg_addr_table*:-Xlinker -seg_addr_table -Xlinker %*} \
 253      %<seg_addr_table*",                                                \
 254   "%{seg1addr*:-Xlinker -image_base -Xlinker %*} %<seg1addr*",          \
 255   "%{seglinkedit:-Xlinker -seglinkedit} %<seglinkedit",                 \
 256   "%{noseglinkedit:-Xlinker -noseglinkedit} %<noseglinkedit",           \
 257   "%{segs_read_only_addr*:-Xlinker -segs_read_only_addr -Xlinker %*} \
 258     %<segs_read_only_addr*",                                            \
 259   "%{segs_read_write_addr*:-Xlinker -segs_read_write_addr -Xlinker %*} \
 260     %<segs_read_write_addr*",                                           \
 261   "%{single_module:-Xlinker -single_module} %<single_module",           \
 262   "%{sub_library*:-Xlinker -sub_library -Xlinker %*} %<sub_library*",   \
 263   "%{sub_umbrella*:-Xlinker -sub_umbrella -Xlinker %*} %<sub_umbrella*",\
 264   "%{twolevel_namespace:-Xlinker -twolevel_namespace} \
 265      %<twolevel_namespace",                                             \
 266   "%{twolevel_namespace_hints:-Xlinker -twolevel_namespace_hints} \
 267      %<twolevel_namespace_hints",                                       \
 268   "%{umbrella*:-Xlinker -umbrella -Xlinker %*} %<umbrella*",            \
 269   "%{undefined*:-Xlinker -undefined -Xlinker %*} %<undefined*",         \
 270   "%{unexported_symbols_list*:\
 271      -Xlinker -unexported_symbols_list -Xlinker %*} \
 272      %<unexported_symbols_list*",                                       \
 273   "%{weak_reference_mismatches*:\
 274     -Xlinker -weak_reference_mismatches -Xlinker %*} \
 275     %<weak_reference_mismatches*",                                      \
 276   "%{whyload:-Xlinker -whyload} %<whyload",                             \
 277   "%{whatsloaded:-Xlinker -whatsloaded} %<whatsloaded",                 \
 278   "%{w:-Xlinker -w}",                                                   \
 279   "%<y*",                                                               \
 280   "%<Mach "
 281
 282 #if LD64_HAS_EXPORT_DYNAMIC
 283 #define DARWIN_RDYNAMIC "%{rdynamic:-export_dynamic}"
 284 #else
 285 #define DARWIN_RDYNAMIC "%{rdynamic:%nrdynamic is not supported}"
 286 #endif
 287
 288 /* Code built with mdynamic-no-pic does not support PIE/PIC, so  we disallow
 289    these combinations; we also ensure that the no_pie option is passed to
 290    ld64 on system versions that default to PIE when mdynamic-no-pic is given.
 291    FIXME: we should check that the linker supports the -pie and -no_pie.
 292    options.  */
 293 #define DARWIN_PIE_SPEC \
 294 "%{pie|fpie|fPIE:\
 295    %{mdynamic-no-pic: \
 296      %n'-mdynamic-no-pic' overrides '-pie', '-fpie' or '-fPIE'; \
 297      :%:version-compare(>= 10.5 mmacosx-version-min= -pie) }; \
 298    mdynamic-no-pic:%:version-compare(>= 10.7 mmacosx-version-min= -no_pie) } "
 299
 300 #define DARWIN_NOPIE_SPEC \
 301 "%{no-pie|fno-pie|fno-PIE: \
 302    %:version-compare(>= 10.7 mmacosx-version-min= -no_pie) }"
 303
 304 #define DARWIN_CC1_SPEC                                                 \
 305   "%<dynamic %<dynamiclib %<force_cpusubtype_ALL "
 306
 307 #define SUBSUBTARGET_OVERRIDE_OPTIONS                                   \
 308   do {                                                                  \
 309     darwin_override_options ();                                         \
 310   } while (0)
 311
 312 #define SUBTARGET_C_COMMON_OVERRIDE_OPTIONS do {                        \
 313     if (flag_mkernel || flag_apple_kext)                                \
 314       {                                                                 \
 315         if (flag_use_cxa_atexit == 2)                                   \
 316           flag_use_cxa_atexit = 0;                                      \
 317         /* kexts should always be built without the coalesced sections  \
 318            because the kernel loader doesn't grok such sections.  */    \
 319         flag_weak = 0;                                                  \
 320         /* No RTTI in kexts.  */                                        \
 321         flag_rtti = 0;                                                  \
 322       }                                                                 \
 323   } while (0)
 324
 325 /* Machine dependent cpp options.  Don't add more options here, add
 326    them to darwin_cpp_builtins in darwin-c.cc.  */
 327
 328 #undef  CPP_SPEC
 329 #define CPP_SPEC "%{static:%{!dynamic:-D__STATIC__}}%{!static:-D__DYNAMIC__}" \
 330         " %{pthread:-D_REENTRANT} "
 331
 332 /* This is a fix for PR41260 by passing -no_compact_unwind on darwin10 and
 333    later until the assembler, linker and libunwind are able to deal with the
 334    output from GCC.
 335
 336    FIXME: we should check that the linker supports the option.
 337 */
 338
 339 #define DARWIN_NOCOMPACT_UNWIND \
 340 " %:version-compare(>= 10.6 mmacosx-version-min= -no_compact_unwind) "
 341
 342 /* In Darwin linker specs we can put -lcrt0.o and ld will search the library
 343    path for crt0.o or -lcrtx.a and it will search for libcrtx.a.  As for
 344    other ports, we can also put xxx.{o,a}%s and get the appropriate complete
 345    startfile absolute directory.  This latter point is important when we want
 346    to override ld's rule of .dylib being found ahead of .a and the user wants
 347    the convenience library to be linked.  */
 348
 349 /* The LINK_COMMAND spec is mostly a clone of the standard LINK_COMMAND_SPEC,
 350    plus precomp, libtool, and fat build additions.
 351
 352    In general, random Darwin linker flags should go into LINK_SPEC
 353    instead of LINK_COMMAND_SPEC.  The command spec is better for
 354    specifying the handling of options understood by generic Unix
 355    linkers, and for positional arguments like libraries.  */
 356
 357 #define LINK_COMMAND_SPEC_A \
 358    "%{!c:%{!E:%{!S:%{!M:%{!MM:%{!fsyntax-only:%{!fdump=*: \
 359     %(linker)" \
 360     LINK_PLUGIN_SPEC \
 361     "%{flto*:%<fcompare-debug*} \
 362      %{flto} %{fno-lto} %{flto=*} \
 363     %l " LINK_COMPRESS_DEBUG_SPEC \
 364    "%X %{s} %{t} %{Z} %{u*} \
 365     %{e*} %{r} \
 366     %{o*}%{!o:-o a.out} \
 367     %{!r:%{!nostdlib:%{!nostartfiles:%S}}} \
 368     %{L*} %(link_libgcc) %o \
 369     %{!r:%{!nostdlib:%{!nodefaultlibs:\
 370       %{fprofile-arcs|fprofile-generate*|coverage:-lgcov} \
 371       %{fopenacc|fopenmp|%:gt(%{ftree-parallelize-loops=*:%*} 1): \
 372         %{static|static-libgcc|static-libstdc++|static-libgfortran: \
 373           libgomp.a%s; : -lgomp }} \
 374       %{fgnu-tm: \
 375         %{static|static-libgcc|static-libstdc++|static-libgfortran: \
 376           libitm.a%s; : -litm }} \
 377       %{%:sanitize(address): -lasan } \
 378       %{%:sanitize(undefined): -lubsan } \
 379       %(link_ssp) \
 380       %:version-compare(>< 10.6 10.7 mmacosx-version-min= -ld10-uwfef) \
 381       %(link_gcc_c_sequence) \
 382       %{!nodefaultexport:%{dylib|dynamiclib|bundle: \
 383         %:version-compare(>= 10.11 asm_macosx_version_min= -U) \
 384         %:version-compare(>= 10.11 asm_macosx_version_min= ___emutls_get_address) \
 385         %:version-compare(>= 10.11 asm_macosx_version_min= -exported_symbol) \
 386         %:version-compare(>= 10.11 asm_macosx_version_min= ___emutls_get_address) \
 387         %:version-compare(>= 10.11 asm_macosx_version_min= -U) \
 388         %:version-compare(>= 10.11 asm_macosx_version_min= ___emutls_register_common) \
 389         %:version-compare(>= 10.11 asm_macosx_version_min= -exported_symbol) \
 390         %:version-compare(>= 10.11 asm_macosx_version_min= ___emutls_register_common) \
 391       }} \
 392     }}}\
 393     %{!r:%{!nostdlib:%{!nostartfiles:%E}}} %{T*} %{F*} "\
 394     DARWIN_PIE_SPEC \
 395     DARWIN_NOPIE_SPEC \
 396     DARWIN_RDYNAMIC \
 397     DARWIN_NOCOMPACT_UNWIND \
 398     "}}}}}}} %<pie %<no-pie %<rdynamic %<X %<rpath "
 399
 400 /* Spec that controls whether the debug linker is run automatically for
 401    a link step.  This needs to be done if there is a source file on the
 402    command line which will result in a temporary object (and debug is
 403    enabled).  */
 404
 405 #define DSYMUTIL_SPEC \
 406   "%{!c:%{!E:%{!S:%{!r:%{!M:%{!MM:%{!fsyntax-only:%{!fdump=*:\
 407      %{g*:%{!gctf:%{!gbtf:%{!gstabs*:%{%:debug-level-gt(0): -idsym \
 408        %{.c|.cc|.C|.cpp|.cp|.c++|.cxx|.CPP|.m|.mm|.s|.f|.f90|\
 409          .f95|.f03|.f77|.for|.F|.F90|.F95|.F03|.d: -dsym }\
 410       }}}}}\
 411    }}}}}}}}"
 412
 413 #define LINK_COMMAND_SPEC LINK_COMMAND_SPEC_A DSYMUTIL_SPEC
 414
 415 /* Tell collect2 to run dsymutil for us as necessary.  */
 416 #define COLLECT_RUN_DSYMUTIL 1
 417
 418 /* We only want one instance of %G, since libSystem (Darwin's -lc) does not
 419    depend on libgcc. */
 420 #undef  LINK_GCC_C_SEQUENCE_SPEC
 421 #define LINK_GCC_C_SEQUENCE_SPEC \
 422  "%G %{!nolibc:%L} "
 423
 424 /* ld64 supports a sysroot, it just has a different name and there's no easy
 425    way to check for it at config time.  */
 426 #undef HAVE_LD_SYSROOT
 427 #define HAVE_LD_SYSROOT 1
 428 /* It seems the only (working) way to get a space after %R is to append a
 429    dangling '/'.  */
 430 #define SYSROOT_SPEC "%{!isysroot*:-syslibroot %R/ } "
 431
 432 /* Do the same as clang, for now, and insert the sysroot for ld when an
 433    isysroot is specified.  */
 434 #define LINK_SYSROOT_SPEC "%{isysroot*:-syslibroot %*} "
 435
 436 /* Suppress the addition of extra prefix paths when a sysroot is in use.  */
 437 #define STANDARD_STARTFILE_PREFIX_1 ""
 438 #define STANDARD_STARTFILE_PREFIX_2 ""
 439
 440
 441 /* Please keep the random linker options in alphabetical order.
 442    Note that options taking arguments may appear multiple times on a command
 443    line with different arguments each time, so put a * after their names so
 444    all of them get passed.  */
 445 #define LINK_SPEC  \
 446   "%{static}%{!static:%{!dynamic:-dynamic}} \
 447    %:remove-outfile(-ldl) \
 448    %:remove-outfile(-lm) \
 449    %:remove-outfile(-lpthread) \
 450    %{fgnu-runtime: %{static|static-libgcc: \
 451                      %:replace-outfile(-lobjc libobjc-gnu.a%s); \
 452                     :%:replace-outfile(-lobjc -lobjc-gnu )}}\
 453    %{static|static-libgcc|static-libgfortran:%:replace-outfile(-lgfortran libgfortran.a%s)}\
 454    %{static|static-libgcc|static-libphobos:%:replace-outfile(-lgphobos libgphobos.a%s)}\
 455    %{static|static-libgcc|static-libstdc++|static-libgfortran:%:replace-outfile(-lgomp libgomp.a%s)}\
 456    %{static|static-libgcc|static-libstdc++:%:replace-outfile(-lstdc++ libstdc++.a%s)}\
 457    %{force_cpusubtype_ALL:-arch %(darwin_arch)} \
 458    %{!force_cpusubtype_ALL:-arch %(darwin_subarch)} "\
 459    LINK_SYSROOT_SPEC \
 460   "%{mmacosx-version-min=*:-macosx_version_min %*} \
 461    %{sectalign*} %{sectcreate*} %{sectobjectsymbols*}  %{sectorder*} \
 462    %{segaddr*} %{segcreate*} %{segprot*} "
 463
 464 /* Machine dependent libraries.  */
 465
 466 #define LIB_SPEC "%{!static:-lSystem}"
 467
 468 /* Note that by default, -lgcc_eh (which provides a statically-linked unwinder)
 469    is not used. This is because, in general, we need to unwind through system
 470    libraries that are linked with the shared unwinder in libunwind (or libgcc_s
 471    for OSX 10.4/5 [darwin8/9]).
 472
 473    When -static-libgcc is forced: < 10.6, use the unwinder in libgcc_eh (and
 474    find the emultls impl. there too).
 475
 476    For -static-libgcc: >= 10.6, the unwinder *still* comes from libSystem and
 477    we find the emutls impl from lemutls_w. In either case, the builtins etc.
 478    are linked from -lgcc.  The eh library is still available so that it could
 479    be specified explicitly if there is some reason to do so.
 480
 481    When we have specified shared-libgcc or any case that might require
 482    exceptions, we pull the libgcc content (including emulated tls) from
 483    -lgcc_s.1.1 in GCC and the unwinder from /usr/lib/libgcc_s.1 for < 10.6 and
 484    libSystem for >= 10.6 respectively.
 485    Otherwise, we just link the emutls/builtins from convenience libs.
 486
 487    We have to work around that DYLD_XXXX are disabled in macOS 10.11+ which
 488    means that any bootstrap trying to use a shared libgcc with a bumped SO-
 489    name will fail.  This means that we do not accept shared libgcc for these
 490    versions (the primary reason for forcing a shared libgcc was that it
 491    contained the unwinder on Darwin8 and 9).
 492
 493    When using the shared version of gcc_s.1.1 the unwinder is provided by:
 494      * Prior to 10.3.9, then we have to link the static eh lib, since there
 495        is no shared unwinder version on the system.
 496      * from 10.3.9 to 10.5, from /usr/lib/libgcc_s.1.dylib
 497      * from 10.6 onwards, from libSystem.dylib
 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.cc 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 /* We now require C++11 to bootstrap and newer tools than those based on
 606    stabs, so require DWARF-2, even if stabs is supported by the assembler.  */
 607
 608 #define DWARF2_DEBUGGING_INFO 1
 609 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
 610
 611 #ifdef HAVE_AS_STABS_DIRECTIVE
 612 #define DBX_DEBUGGING_INFO 1
 613 #endif
 614
 615 #define DEBUG_FRAME_SECTION       "__DWARF,__debug_frame,regular,debug"
 616 #define DEBUG_INFO_SECTION        "__DWARF,__debug_info,regular,debug"
 617 #define DEBUG_ABBREV_SECTION      "__DWARF,__debug_abbrev,regular,debug"
 618 #define DEBUG_ARANGES_SECTION     "__DWARF,__debug_aranges,regular,debug"
 619 #define DEBUG_MACINFO_SECTION     "__DWARF,__debug_macinfo,regular,debug"
 620 #define DEBUG_LINE_SECTION        "__DWARF,__debug_line,regular,debug"
 621 #define DEBUG_LOC_SECTION         "__DWARF,__debug_loc,regular,debug"
 622 #define DEBUG_LOCLISTS_SECTION    "__DWARF,__debug_loclists,regular,debug"
 623
 624 #define DEBUG_STR_SECTION         "__DWARF,__debug_str,regular,debug"
 625 #define DEBUG_STR_OFFSETS_SECTION "__DWARF,__debug_str_offs,regular,debug"
 626 #define DEBUG_RANGES_SECTION      "__DWARF,__debug_ranges,regular,debug"
 627 #define DEBUG_RNGLISTS_SECTION    "__DWARF,__debug_rnglists,regular,debug"
 628 #define DEBUG_MACRO_SECTION       "__DWARF,__debug_macro,regular,debug"
 629
 630 #define DEBUG_LTO_INFO_SECTION    "__GNU_DWARF_LTO,__debug_info,regular,debug"
 631 #define DEBUG_LTO_ABBREV_SECTION  "__GNU_DWARF_LTO,__debug_abbrev,regular,debug"
 632 #define DEBUG_LTO_MACINFO_SECTION "__GNU_DWARF_LTO,__debug_macinfo,regular,debug"
 633 #define DEBUG_LTO_LINE_SECTION    "__GNU_DWARF_LTO,__debug_line,regular,debug"
 634 #define DEBUG_LTO_STR_SECTION     "__GNU_DWARF_LTO,__debug_str,regular,debug"
 635 #define DEBUG_LTO_MACRO_SECTION   "__GNU_DWARF_LTO,__debug_macro,regular,debug"
 636
 637 #define TARGET_WANT_DEBUG_PUB_SECTIONS true
 638 #define DEBUG_PUBNAMES_SECTION   ((debug_generate_pub_sections == 2) \
 639                                ? "__DWARF,__debug_gnu_pubn,regular,debug" \
 640                                : "__DWARF,__debug_pubnames,regular,debug")
 641
 642 #define DEBUG_PUBTYPES_SECTION   ((debug_generate_pub_sections == 2) \
 643                                ? "__DWARF,__debug_gnu_pubt,regular,debug" \
 644                                : "__DWARF,__debug_pubtypes,regular,debug")
 645
 646 /* When generating stabs debugging, use N_BINCL entries.  */
 647
 648 #define DBX_USE_BINCL
 649
 650 /* There is no limit to the length of stabs strings.  */
 651
 652 #define DBX_CONTIN_LENGTH 0
 653
 654 /* gdb needs a null N_SO at the end of each file for scattered loading.  */
 655
 656 #define DBX_OUTPUT_NULL_N_SO_AT_MAIN_SOURCE_FILE_END
 657
 658 /* GCC's definition of 'one_only' is the same as its definition of 'weak'.  */
 659 #define MAKE_DECL_ONE_ONLY(DECL) (DECL_WEAK (DECL) = 1)
 660
 661 /* Mach-O supports 'weak imports', and 'weak definitions' in coalesced
 662    sections.  machopic_select_section ensures that weak variables go in
 663    coalesced sections.  Weak aliases (or any other kind of aliases) are
 664    not supported.  Weak symbols that aren't visible outside the .s file
 665    are not supported.  */
 666 #define ASM_WEAKEN_DECL(FILE, DECL, NAME, ALIAS)                        \
 667   do {                                                                  \
 668     if (ALIAS)                                                          \
 669       {                                                                 \
 670         warning (0, "alias definitions not supported in Mach-O; ignored");      \
 671         break;                                                          \
 672       }                                                                 \
 673                                                                         \
 674     if (! DECL_EXTERNAL (DECL) && TREE_PUBLIC (DECL))                   \
 675       targetm.asm_out.globalize_label (FILE, NAME);                     \
 676     if (DECL_EXTERNAL (DECL))                                           \
 677       fputs ("\t.weak_reference ", FILE);                               \
 678     else if (lookup_attribute ("weak_import", DECL_ATTRIBUTES (DECL)))  \
 679       break;                                                            \
 680     else if (TREE_PUBLIC (DECL))                                        \
 681       fputs ("\t.weak_definition ", FILE);                              \
 682     else                                                                \
 683       break;                                                            \
 684     assemble_name (FILE, NAME);                                         \
 685     fputc ('\n', FILE);                                                 \
 686   } while (0)
 687
 688 /* Darwin has the pthread routines in libSystem, which every program
 689    links to, so there's no need for weak-ness for that.  */
 690 #define GTHREAD_USE_WEAK 0
 691
 692 /* On Darwin, we don't (at the time of writing) have linkonce sections
 693    with names, so it's safe to make the class data not comdat.  */
 694 #define TARGET_CXX_CLASS_DATA_ALWAYS_COMDAT hook_bool_void_false
 695
 696 /* For efficiency, on Darwin the RTTI information that is always
 697    emitted in the standard C++ library should not be COMDAT.  */
 698 #define TARGET_CXX_LIBRARY_RTTI_COMDAT hook_bool_void_false
 699
 700 /* We make exception information linkonce. */
 701 #undef TARGET_USES_WEAK_UNWIND_INFO
 702 #define TARGET_USES_WEAK_UNWIND_INFO 1
 703
 704 /* We need to use a nonlocal label for the start of an EH frame: the
 705    Darwin linker requires that a coalesced section start with a label.
 706    Unfortunately, it also requires that 'debug' sections don't contain
 707    labels.  */
 708 #undef FRAME_BEGIN_LABEL
 709 #define FRAME_BEGIN_LABEL (for_eh ? "EH_frame" : "Lframe")
 710
 711 /* Emit a label for the FDE corresponding to DECL.  EMPTY means
 712    emit a label for an empty FDE. */
 713 #define TARGET_ASM_EMIT_UNWIND_LABEL darwin_emit_unwind_label
 714
 715 /* Emit a label to separate the exception table.  */
 716 #define TARGET_ASM_EMIT_EXCEPT_TABLE_LABEL darwin_emit_except_table_label
 717
 718 /* Make an EH (personality or LDSA) symbol indirect as needed.  */
 719 #define TARGET_ASM_MAKE_EH_SYMBOL_INDIRECT darwin_make_eh_symbol_indirect
 720
 721 /* Some of Darwin's unwinders need current frame address state to be reset
 722    after a DW_CFA_restore_state recovers the register values.  */
 723 #undef TARGET_ASM_SHOULD_RESTORE_CFA_STATE
 724 #define TARGET_ASM_SHOULD_RESTORE_CFA_STATE darwin_should_restore_cfa_state
 725
 726 /* Our profiling scheme doesn't LP labels and counter words.  */
 727
 728 #define NO_PROFILE_COUNTERS     1
 729
 730 #undef  INIT_SECTION_ASM_OP
 731 #define INIT_SECTION_ASM_OP ""
 732
 733 #undef  INVOKE__main
 734
 735 #define TARGET_ASM_CONSTRUCTOR  machopic_asm_out_constructor
 736 #define TARGET_ASM_DESTRUCTOR   machopic_asm_out_destructor
 737
 738 /* Always prefix with an underscore.  */
 739
 740 #define USER_LABEL_PREFIX "_"
 741
 742 /* A dummy symbol that will be replaced with the function base name.  */
 743 #define MACHOPIC_FUNCTION_BASE_NAME "<pic base>"
 744
 745 /* Don't output a .file directive.  That is only used by the assembler for
 746    error reporting.  */
 747 #undef  TARGET_ASM_FILE_START_FILE_DIRECTIVE
 748 #define TARGET_ASM_FILE_START_FILE_DIRECTIVE false
 749
 750 #undef  TARGET_ASM_FILE_END
 751 #define TARGET_ASM_FILE_END darwin_file_end
 752
 753 /* Because Mach-O relocations have a counter from 1 to 255 for the
 754    section number they apply to, it is necessary to output all
 755    normal sections before the LTO sections, to make sure that the
 756    sections that may have relocations always have a section number
 757    smaller than 255.  */
 758 #undef  TARGET_ASM_LTO_START
 759 #define TARGET_ASM_LTO_START darwin_asm_lto_start
 760 #undef  TARGET_ASM_LTO_END
 761 #define TARGET_ASM_LTO_END darwin_asm_lto_end
 762
 763 #define ASM_OUTPUT_SKIP(FILE,SIZE)  \
 764   fprintf (FILE, "\t.space " HOST_WIDE_INT_PRINT_UNSIGNED"\n", SIZE)
 765
 766 /* Give ObjC methods pretty symbol names.  */
 767
 768 #undef  OBJC_GEN_METHOD_LABEL
 769 #define OBJC_GEN_METHOD_LABEL(BUF,IS_INST,CLASS_NAME,CAT_NAME,SEL_NAME,NUM) \
 770   do { if (CAT_NAME)                                                    \
 771          sprintf (BUF, "%c[%s(%s) %s]", (IS_INST) ? '-' : '+',          \
 772                   (CLASS_NAME), (CAT_NAME), (SEL_NAME));                \
 773        else                                                             \
 774          sprintf (BUF, "%c[%s %s]", (IS_INST) ? '-' : '+',              \
 775                   (CLASS_NAME), (SEL_NAME));                            \
 776      } while (0)
 777
 778 #undef ASM_DECLARE_OBJECT_NAME
 779 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL) \
 780         darwin_asm_declare_object_name ((FILE), (NAME), (DECL))
 781
 782 /* The RTTI data (e.g., __ti4name) is common and public (and static),
 783    but it does need to be referenced via indirect PIC data pointers.
 784    The machopic_define_symbol calls are telling the machopic subsystem
 785    that the name *is* defined in this module, so it doesn't need to
 786    make them indirect.  */
 787
 788 #undef ASM_DECLARE_FUNCTION_NAME
 789 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL)                     \
 790   do {                                                                  \
 791     const char *xname = NAME;                                           \
 792     if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF)             \
 793       xname = IDENTIFIER_POINTER (DECL_NAME (DECL));                    \
 794     if (! DECL_WEAK (DECL)                                              \
 795         && ((TREE_STATIC (DECL)                                         \
 796              && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))           \
 797             || DECL_INITIAL (DECL)))                                    \
 798         machopic_define_symbol (DECL_RTL (DECL));                       \
 799     if ((TREE_STATIC (DECL)                                             \
 800          && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))               \
 801         || DECL_INITIAL (DECL))                                         \
 802       (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false);   \
 803     ASM_OUTPUT_FUNCTION_LABEL (FILE, xname, DECL);                      \
 804   } while (0)
 805
 806 #undef TARGET_ASM_DECLARE_CONSTANT_NAME
 807 #define TARGET_ASM_DECLARE_CONSTANT_NAME darwin_asm_declare_constant_name
 808
 809 /* Wrap new method names in quotes so the assembler doesn't gag.
 810    Make Objective-C internal symbols local and in doing this, we need
 811    to accommodate the name mangling done by c++ on file scope locals.  */
 812
 813 int darwin_label_is_anonymous_local_objc_name (const char *name);
 814
 815 #undef  ASM_OUTPUT_LABELREF
 816 #define ASM_OUTPUT_LABELREF(FILE,NAME)                                       \
 817   do {                                                                       \
 818        const char *xname = (NAME);                                           \
 819        if (! strcmp (xname, MACHOPIC_FUNCTION_BASE_NAME))                    \
 820          machopic_output_function_base_name(FILE);                           \
 821        else if (xname[0] == '&' || xname[0] == '*')                          \
 822          {                                                                   \
 823            int len = strlen (xname);                                         \
 824            if (len > 6 && !strcmp ("$stub", xname + len - 5))                \
 825              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 826            else if (len > 7 && !strcmp ("$stub\"", xname + len - 6))         \
 827              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 828            else if (len > 14 && !strcmp ("$non_lazy_ptr", xname + len - 13)) \
 829              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 830            else if (len > 15 && !strcmp ("$non_lazy_ptr\"", xname + len - 14)) \
 831              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 832            if (xname[1] != '"' && name_needs_quotes (&xname[1]))             \
 833              fprintf (FILE, "\"%s\"", &xname[1]);                            \
 834            else                                                              \
 835              fputs (&xname[1], FILE);                                        \
 836          }                                                                   \
 837        else if (xname[0] == '+' || xname[0] == '-')                          \
 838          fprintf (FILE, "\"%s\"", xname);                                    \
 839        else if (darwin_label_is_anonymous_local_objc_name (xname))           \
 840          fprintf (FILE, "L%s", xname);                                       \
 841        else if (xname[0] != '"' && name_needs_quotes (xname))                \
 842          asm_fprintf (FILE, "\"%U%s\"", xname);                              \
 843        else                                                                  \
 844          asm_fprintf (FILE, "%U%s", xname);                                  \
 845   } while (0)
 846
 847 /* Output before executable code.  */
 848 #undef TEXT_SECTION_ASM_OP
 849 #define TEXT_SECTION_ASM_OP "\t.text"
 850
 851 /* Output before writable data.  */
 852
 853 #undef DATA_SECTION_ASM_OP
 854 #define DATA_SECTION_ASM_OP "\t.data"
 855
 856 #undef  ALIGN_ASM_OP
 857 #define ALIGN_ASM_OP            ".align"
 858
 859 #undef  ASM_OUTPUT_ALIGN
 860 #define ASM_OUTPUT_ALIGN(FILE,LOG)      \
 861   if ((LOG) != 0)                       \
 862     fprintf (FILE, "\t%s\t%d\n", ALIGN_ASM_OP, (LOG))
 863
 864 /* The maximum alignment which the object file format can support in bits
 865    which depends on the OS version and whether the object is a common
 866    variable.  */
 867
 868 #undef  MAX_OFILE_ALIGNMENT
 869 #define MAX_OFILE_ALIGNMENT ((1U << L2_MAX_OFILE_ALIGNMENT) * 8U)
 870
 871 /*  These are the three variants that emit referenced blank space.  */
 872 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN)           \
 873         darwin_output_aligned_bss ((FILE), (DECL), (NAME), (SIZE), (ALIGN))
 874
 875 #undef  ASM_OUTPUT_ALIGNED_DECL_LOCAL
 876 #define ASM_OUTPUT_ALIGNED_DECL_LOCAL(FILE, DECL, NAME, SIZE, ALIGN)    \
 877         darwin_asm_output_aligned_decl_local                            \
 878                                   ((FILE), (DECL), (NAME), (SIZE), (ALIGN))
 879
 880 #undef  ASM_OUTPUT_ALIGNED_DECL_COMMON
 881 #define ASM_OUTPUT_ALIGNED_DECL_COMMON(FILE, DECL, NAME, SIZE, ALIGN)   \
 882         darwin_asm_output_aligned_decl_common                           \
 883                                    ((FILE), (DECL), (NAME), (SIZE), (ALIGN))
 884
 885 /* The generic version, archs should over-ride where required.  */
 886 #define MACHOPIC_NL_SYMBOL_PTR_SECTION ".non_lazy_symbol_pointer"
 887
 888 /* Declare the section variables.  */
 889 #ifndef USED_FOR_TARGET
 890 enum darwin_section_enum {
 891 #define DEF_SECTION(NAME, FLAGS, DIRECTIVE, OBJC) NAME,
 892 #include "darwin-sections.def"
 893 #undef DEF_SECTION
 894   NUM_DARWIN_SECTIONS
 895 };
 896 extern GTY(()) section * darwin_sections[NUM_DARWIN_SECTIONS];
 897 #endif
 898
 899 #undef  TARGET_ASM_SELECT_SECTION
 900 #define TARGET_ASM_SELECT_SECTION machopic_select_section
 901
 902 #undef  TARGET_ASM_FUNCTION_SECTION
 903 #define TARGET_ASM_FUNCTION_SECTION darwin_function_section
 904
 905 #undef  TARGET_ASM_SELECT_RTX_SECTION
 906 #define TARGET_ASM_SELECT_RTX_SECTION machopic_select_rtx_section
 907 #undef  TARGET_ASM_UNIQUE_SECTION
 908 #define TARGET_ASM_UNIQUE_SECTION darwin_unique_section
 909 #undef  TARGET_ASM_FUNCTION_RODATA_SECTION
 910 #define TARGET_ASM_FUNCTION_RODATA_SECTION default_no_function_rodata_section
 911
 912 #undef  TARGET_ASM_TM_CLONE_TABLE_SECTION
 913 #define TARGET_ASM_TM_CLONE_TABLE_SECTION darwin_tm_clone_table_section
 914
 915 #undef  TARGET_ASM_RELOC_RW_MASK
 916 #define TARGET_ASM_RELOC_RW_MASK machopic_reloc_rw_mask
 917
 918 /* Globalizing directive for a label.  */
 919 #define GLOBAL_ASM_OP "\t.globl "
 920 #define TARGET_ASM_GLOBALIZE_LABEL darwin_globalize_label
 921
 922 /* Emit an assembler directive to set visibility for a symbol.  Used
 923    to support visibility attribute and Darwin's private extern
 924    feature.  */
 925 #undef TARGET_ASM_ASSEMBLE_VISIBILITY
 926 #define TARGET_ASM_ASSEMBLE_VISIBILITY darwin_assemble_visibility
 927
 928 /* Extra attributes for Darwin.  */
 929 #define SUBTARGET_ATTRIBUTE_TABLE                                            \
 930   /* { name, min_len, max_len, decl_req, type_req, fn_type_req,              \
 931        affects_type_identity, handler, exclude } */                          \
 932   { "apple_kext_compatibility", 0, 0, false, true, false, false,             \
 933     darwin_handle_kext_attribute, NULL },                                    \
 934   { "weak_import", 0, 0, true, false, false, false,                          \
 935     darwin_handle_weak_import_attribute, NULL }
 936
 937 /* Make local constant labels linker-visible, so that if one follows a
 938    weak_global constant, ld64 will be able to separate the atoms.  */
 939 #undef ASM_GENERATE_INTERNAL_LABEL
 940 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM)   \
 941   do {                                                  \
 942     if (strcmp ("LC", PREFIX) == 0)                     \
 943       sprintf (LABEL, "*%s%ld", "lC", (long)(NUM));     \
 944     else if (strcmp ("Lubsan_data", PREFIX) == 0)       \
 945       sprintf (LABEL, "*%s%ld", "lubsan_data", (long)(NUM));\
 946     else if (strcmp ("Lubsan_type", PREFIX) == 0)       \
 947       sprintf (LABEL, "*%s%ld", "lubsan_type", (long)(NUM));\
 948     else if (strcmp ("LASAN", PREFIX) == 0)     \
 949       sprintf (LABEL, "*%s%ld", "lASAN", (long)(NUM));\
 950     else if (strcmp ("LTRAMP", PREFIX) == 0)    \
 951       sprintf (LABEL, "*%s%ld", "lTRAMP", (long)(NUM));\
 952     else                                                \
 953       sprintf (LABEL, "*%s%ld", PREFIX, (long)(NUM));   \
 954   } while (0)
 955
 956 #undef TARGET_ASM_MARK_DECL_PRESERVED
 957 #define TARGET_ASM_MARK_DECL_PRESERVED darwin_mark_decl_preserved
 958
 959 /* Any port using this header needs to define the first available
 960    subtarget symbol bit: SYMBOL_FLAG_SUBT_DEP.  */
 961
 962 /* Is a variable. */
 963 #define MACHO_SYMBOL_FLAG_VARIABLE (SYMBOL_FLAG_SUBT_DEP)
 964 #define MACHO_SYMBOL_VARIABLE_P(RTX) \
 965   ((SYMBOL_REF_FLAGS (RTX) & MACHO_SYMBOL_FLAG_VARIABLE) != 0)
 966
 967 /* Set on a symbol that must be indirected, even when there is a
 968    definition in the TU.  The ABI mandates that common symbols are so
 969    indirected, as are weak.  If 'fix-and-continue' is operational then
 970    data symbols might also be.  */
 971
 972 #define MACHO_SYMBOL_FLAG_MUST_INDIRECT ((SYMBOL_FLAG_SUBT_DEP) << 1)
 973 #define MACHO_SYMBOL_MUST_INDIRECT_P(RTX) \
 974   ((SYMBOL_REF_FLAGS (RTX) & MACHO_SYMBOL_FLAG_MUST_INDIRECT) != 0)
 975
 976 /* Set on a symbol with SYMBOL_FLAG_FUNCTION or MACHO_SYMBOL_FLAG_VARIABLE
 977    to indicate that the function or variable is considered defined in this
 978    translation unit.  */
 979
 980 #define MACHO_SYMBOL_FLAG_DEFINED ((SYMBOL_FLAG_SUBT_DEP) << 2)
 981 #define MACHO_SYMBOL_DEFINED_P(RTX) \
 982   ((SYMBOL_REF_FLAGS (RTX) & MACHO_SYMBOL_FLAG_DEFINED) != 0)
 983
 984 /* Set on a symbol that has specified non-default visibility.  */
 985
 986 #define MACHO_SYMBOL_FLAG_HIDDEN_VIS ((SYMBOL_FLAG_SUBT_DEP) << 3)
 987 #define MACHO_SYMBOL_HIDDEN_VIS_P(RTX) \
 988   ((SYMBOL_REF_FLAGS (RTX) & MACHO_SYMBOL_FLAG_HIDDEN_VIS) != 0)
 989
 990 /* Set on a symbol that should be made visible to the linker (overriding
 991    'L' symbol prefixes).  */
 992
 993 #define MACHO_SYMBOL_FLAG_LINKER_VIS ((SYMBOL_FLAG_SUBT_DEP) << 4)
 994 #define MACHO_SYMBOL_LINKER_VIS_P(RTX) \
 995   ((SYMBOL_REF_FLAGS (RTX) & MACHO_SYMBOL_FLAG_LINKER_VIS) != 0)
 996
 997 /* Set on a symbol that is a pic stub or symbol indirection (i.e. the
 998    L_xxxxx${stub,non_lazy_ptr,lazy_ptr}.  */
 999
1000 #define MACHO_SYMBOL_FLAG_INDIRECTION ((SYMBOL_FLAG_SUBT_DEP) << 5)
1001 #define MACHO_SYMBOL_INDIRECTION_P(RTX) \
1002   ((SYMBOL_REF_FLAGS (RTX) & MACHO_SYMBOL_FLAG_INDIRECTION) != 0)
1003
1004 /* Set on a symbol to indicate when fix-and-continue style code
1005    generation is being used and the symbol refers to a static symbol
1006    that should be rebound from new instances of a translation unit to
1007    the original instance of the data.  */
1008
1009 #define MACHO_SYMBOL_FLAG_STATIC ((SYMBOL_FLAG_SUBT_DEP) << 6)
1010 #define MACHO_SYMBOL_STATIC_P(RTX) \
1011   ((SYMBOL_REF_FLAGS (RTX) & MACHO_SYMBOL_FLAG_STATIC) != 0)
1012
1013 /* Symbolic names for various things we might know about a symbol.  */
1014
1015 enum machopic_addr_class {
1016   MACHOPIC_UNDEFINED,
1017   MACHOPIC_DEFINED_DATA,
1018   MACHOPIC_UNDEFINED_DATA,
1019   MACHOPIC_DEFINED_FUNCTION,
1020   MACHOPIC_UNDEFINED_FUNCTION
1021 };
1022
1023 /* Macros defining the various PIC cases.  */
1024
1025 #undef  MACHO_DYNAMIC_NO_PIC_P
1026 #define MACHO_DYNAMIC_NO_PIC_P  (TARGET_MACHO_DYNAMIC_NO_PIC)
1027 #undef  MACHOPIC_INDIRECT
1028 #define MACHOPIC_INDIRECT       (flag_pic || MACHO_DYNAMIC_NO_PIC_P)
1029 #define MACHOPIC_JUST_INDIRECT  (MACHO_DYNAMIC_NO_PIC_P)
1030 #undef  MACHOPIC_PURE
1031 #define MACHOPIC_PURE           (flag_pic && ! MACHO_DYNAMIC_NO_PIC_P)
1032
1033 #undef TARGET_ENCODE_SECTION_INFO
1034 #define TARGET_ENCODE_SECTION_INFO  darwin_encode_section_info
1035 #undef TARGET_STRIP_NAME_ENCODING
1036 #define TARGET_STRIP_NAME_ENCODING  default_strip_name_encoding
1037
1038 #define GEN_BINDER_NAME_FOR_STUB(BUF,STUB,STUB_LENGTH)          \
1039   do {                                                          \
1040     const char *const stub_ = (STUB);                           \
1041     char *buffer_ = (BUF);                                      \
1042     strcpy (buffer_, stub_);                                    \
1043     if (stub_[0] == '"')                                        \
1044       {                                                         \
1045         strcpy (buffer_ + (STUB_LENGTH) - 1, "_binder\"");      \
1046       }                                                         \
1047     else                                                        \
1048       {                                                         \
1049         strcpy (buffer_ + (STUB_LENGTH), "_binder");            \
1050       }                                                         \
1051   } while (0)
1052
1053 #define GEN_SYMBOL_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH)    \
1054   do {                                                          \
1055     const char *const symbol_ = (SYMBOL);                       \
1056     char *buffer_ = (BUF);                                      \
1057     if (name_needs_quotes (symbol_) && symbol_[0] != '"')       \
1058       {                                                         \
1059           sprintf (buffer_, "\"%s\"", symbol_);                 \
1060       }                                                         \
1061     else                                                        \
1062       {                                                         \
1063         strcpy (buffer_, symbol_);                              \
1064       }                                                         \
1065   } while (0)
1066
1067 /* Given a symbol name string, create the lazy pointer version
1068    of the symbol name.  */
1069
1070 #define GEN_LAZY_PTR_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH)  \
1071   do {                                                          \
1072     const char *symbol_ = (SYMBOL);                             \
1073     char *buffer_ = (BUF);                                      \
1074     if (symbol_[0] == '"')                                      \
1075       {                                                         \
1076         strcpy (buffer_, "\"L");                                \
1077         strcpy (buffer_ + 2, symbol_ + 1);                      \
1078         strcpy (buffer_ + (SYMBOL_LENGTH), "$lazy_ptr\"");      \
1079       }                                                         \
1080     else if (name_needs_quotes (symbol_))                       \
1081       {                                                         \
1082         strcpy (buffer_, "\"L");                                \
1083         strcpy (buffer_ + 2, symbol_);                          \
1084         strcpy (buffer_ + (SYMBOL_LENGTH) + 2, "$lazy_ptr\"");  \
1085       }                                                         \
1086     else                                                        \
1087       {                                                         \
1088         strcpy (buffer_, "L");                                  \
1089         strcpy (buffer_ + 1, symbol_);                          \
1090         strcpy (buffer_ + (SYMBOL_LENGTH) + 1, "$lazy_ptr");    \
1091       }                                                         \
1092   } while (0)
1093
1094 #define EH_FRAME_SECTION_NAME   "__TEXT"
1095 #define EH_FRAME_SECTION_ATTR ",coalesced,no_toc+strip_static_syms+live_support"
1096
1097 #undef ASM_PREFERRED_EH_DATA_FORMAT
1098 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL)  \
1099   (((CODE) == 2 && (GLOBAL) == 1) \
1100    ? (DW_EH_PE_pcrel | DW_EH_PE_indirect | DW_EH_PE_sdata4) : \
1101      ((CODE) == 1 || (GLOBAL) == 0) ? DW_EH_PE_pcrel : DW_EH_PE_absptr)
1102
1103 #define ASM_OUTPUT_DWARF_DELTA(FILE,SIZE,LABEL1,LABEL2)  \
1104   darwin_asm_output_dwarf_delta (FILE, SIZE, LABEL1, LABEL2, 0)
1105
1106 #define ASM_OUTPUT_DWARF_OFFSET(FILE,SIZE,LABEL,OFFSET,BASE)  \
1107   darwin_asm_output_dwarf_offset (FILE, SIZE, LABEL, OFFSET, BASE)
1108
1109 #define ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX(ASM_OUT_FILE, ENCODING, SIZE, ADDR, DONE)     \
1110       if (ENCODING == ASM_PREFERRED_EH_DATA_FORMAT (2, 1)) {                            \
1111         darwin_non_lazy_pcrel (ASM_OUT_FILE, ADDR);                                     \
1112         goto DONE;                                                                      \
1113       }
1114
1115 /* Experimentally, putting jump tables in text is faster on SPEC.
1116    Also this is needed for correctness for coalesced functions.  */
1117
1118 #ifndef JUMP_TABLES_IN_TEXT_SECTION
1119 #define JUMP_TABLES_IN_TEXT_SECTION 1
1120 #endif
1121
1122 #define TARGET_TERMINATE_DW2_EH_FRAME_INFO false
1123
1124 #define TARGET_ASM_INIT_SECTIONS darwin_init_sections
1125 #undef TARGET_ASM_NAMED_SECTION
1126 #define TARGET_ASM_NAMED_SECTION darwin_asm_named_section
1127
1128 #define DARWIN_REGISTER_TARGET_PRAGMAS()                        \
1129   do {                                                          \
1130     if (!flag_preprocess_only)                                  \
1131       cpp_register_pragma (parse_in, NULL, "mark",              \
1132                            darwin_pragma_ignore, false);        \
1133     c_register_pragma (0, "options", darwin_pragma_options);    \
1134     c_register_pragma (0, "segment", darwin_pragma_ignore);     \
1135     c_register_pragma (0, "unused", darwin_pragma_unused);      \
1136     c_register_pragma (0, "ms_struct", darwin_pragma_ms_struct); \
1137   } while (0)
1138
1139 #undef ASM_APP_ON
1140 #define ASM_APP_ON ""
1141 #undef ASM_APP_OFF
1142 #define ASM_APP_OFF ""
1143
1144 void darwin_register_frameworks (const char *, const char *, int);
1145 void darwin_register_objc_includes (const char *, const char *, int);
1146 #define TARGET_EXTRA_PRE_INCLUDES darwin_register_objc_includes
1147 #define TARGET_EXTRA_INCLUDES darwin_register_frameworks
1148
1149 void add_framework_path (char *);
1150 #define TARGET_OPTF add_framework_path
1151
1152 #define TARGET_POSIX_IO
1153
1154 #define WINT_TYPE "int"
1155
1156 /* Every program on darwin links against libSystem which contains the pthread
1157    routines, so there's no need to explicitly call out when doing threaded
1158    work.  */
1159
1160 #undef GOMP_SELF_SPECS
1161 #define GOMP_SELF_SPECS ""
1162 #undef GTM_SELF_SPECS
1163 #define GTM_SELF_SPECS ""
1164
1165 /* Darwin disables section anchors by default.
1166    They should be enabled per arch where support exists in that arch.  */
1167 #define TARGET_ASM_OUTPUT_ANCHOR NULL
1168 #define DARWIN_SECTION_ANCHORS 0
1169
1170 #define HAVE_ENABLE_EXECUTE_STACK
1171
1172 /* For Apple KEXTs, we make the constructors return this to match gcc
1173    2.95.  */
1174 #define TARGET_CXX_CDTOR_RETURNS_THIS (darwin_kextabi_p)
1175 #define TARGET_KEXTABI flag_apple_kext
1176
1177 /* We have target-specific builtins.  */
1178 #define SUBTARGET_FOLD_BUILTIN darwin_fold_builtin
1179
1180 #define TARGET_N_FORMAT_TYPES 1
1181 #define TARGET_FORMAT_TYPES darwin_additional_format_types
1182
1183 #ifndef USED_FOR_TARGET
1184 extern void darwin_driver_init (unsigned int *,struct cl_decoded_option **);
1185 #define GCC_DRIVER_HOST_INITIALIZATION \
1186   darwin_driver_init (&decoded_options_count, &decoded_options)
1187 #endif
1188
1189 /* The Apple assembler and linker do not support constructor priorities.  */
1190 #undef SUPPORTS_INIT_PRIORITY
1191 #define SUPPORTS_INIT_PRIORITY 0
1192
1193 #undef STACK_CHECK_STATIC_BUILTIN
1194 #define STACK_CHECK_STATIC_BUILTIN 1
1195
1196 /* When building cross-compilers (and native crosses) we shall default to
1197    providing an osx-version-min of this unless overridden by the User.
1198    10.5 is the only version that fully supports all our archs so that's the
1199    fall-back default.  */
1200 #ifndef DEF_MIN_OSX_VERSION
1201 #define DEF_MIN_OSX_VERSION "10.5"
1202 #endif
1203
1204 /* Later versions of ld64 support coalescing weak code/data without requiring
1205    that they be placed in specially identified sections.  This is the earliest
1206    _tested_ version known to support this so far.  */
1207 #define MIN_LD64_NO_COAL_SECTS "236.3"
1208
1209 /* From at least version 62.1, ld64 can build symbol indirection stubs as
1210    needed, and there is no need for the compiler to emit them.  */
1211 #define MIN_LD64_OMIT_STUBS "62.1"
1212
1213 /* Emit start labels for init and term sections from this version.  */
1214 #define MIN_LD64_INIT_TERM_START_LABELS "136.0"
1215
1216 /* If we have no definition for the linker version, pick the minimum version
1217    that will bootstrap the compiler.  */
1218 #ifndef LD64_VERSION
1219 # ifndef  DEF_LD64
1220 #  define LD64_VERSION "85.2.1"
1221 # else
1222 #  define LD64_VERSION DEF_LD64
1223 # endif
1224 #endif
1225
1226 /* CTF and BTF support.  */
1227 #undef CTF_INFO_SECTION_NAME
1228 #define CTF_INFO_SECTION_NAME "__CTF_BTF,__ctf,regular,debug"
1229 #undef BTF_INFO_SECTION_NAME
1230 #define BTF_INFO_SECTION_NAME "__CTF_BTF,__btf,regular,debug"
1231
1232 #endif /* CONFIG_DARWIN_H */