gcc/config/darwin.h

   1 /* Target definitions for Darwin (Mac OS X) systems.
   2    Copyright (C) 1989, 1990, 1991, 1992, 1993, 2000, 2001, 2002, 2003, 2004,
   3    2005
   4    Free Software Foundation, Inc.
   5    Contributed by Apple Computer Inc.
   6
   7 This file is part of GCC.
   8
   9 GCC is free software; you can redistribute it and/or modify
  10 it under the terms of the GNU General Public License as published by
  11 the Free Software Foundation; either version 2, or (at your option)
  12 any later version.
  13
  14 GCC is distributed in the hope that it will be useful,
  15 but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 GNU General Public License for more details.
  18
  19 You should have received a copy of the GNU General Public License
  20 along with GCC; see the file COPYING.  If not, write to
  21 the Free Software Foundation, 51 Franklin Street, Fifth Floor,
  22 Boston, MA 02110-1301, USA.  */
  23
  24 #ifndef CONFIG_DARWIN_H
  25 #define CONFIG_DARWIN_H
  26
  27 /* The definitions in this file are common to all processor types
  28    running Darwin, which is the kernel for Mac OS X.  Darwin is
  29    basically a BSD user layer laid over a Mach kernel, then evolved
  30    for many years (at NeXT) in parallel with other Unix systems.  So
  31    while the runtime is a somewhat idiosyncratic Mach-based thing,
  32    other definitions look like they would for a BSD variant.  */
  33
  34 /* Although NeXT ran on many different architectures, as of Jan 2001
  35    the only supported Darwin targets are PowerPC and x86.  */
  36
  37 /* One of Darwin's NeXT legacies is the Mach-O format, which is partly
  38    like a.out and partly like COFF, with additional features like
  39    multi-architecture binary support.  */
  40
  41 #define OBJECT_FORMAT_MACHO
  42
  43 /* Suppress g++ attempt to link in the math library automatically. */
  44 #define MATH_LIBRARY ""
  45
  46 /* We have atexit.  */
  47
  48 #define HAVE_ATEXIT
  49
  50 /* Define an empty body for the function do_global_dtors() in libgcc2.c.  */
  51
  52 #define DO_GLOBAL_DTORS_BODY
  53
  54 /* The string value for __SIZE_TYPE__.  */
  55
  56 #ifndef SIZE_TYPE
  57 #define SIZE_TYPE "long unsigned int"
  58 #endif
  59
  60 /* Type used for ptrdiff_t, as a string used in a declaration.  */
  61
  62 #undef  PTRDIFF_TYPE
  63 #define PTRDIFF_TYPE "int"
  64
  65 /* wchar_t is int.  */
  66
  67 #undef  WCHAR_TYPE
  68 #define WCHAR_TYPE "int"
  69 #undef  WCHAR_TYPE_SIZE
  70 #define WCHAR_TYPE_SIZE 32
  71
  72 /* Default to using the NeXT-style runtime, since that's what is
  73    pre-installed on Darwin systems.  */
  74
  75 #define NEXT_OBJC_RUNTIME
  76
  77 /* Don't default to pcc-struct-return, because gcc is the only compiler, and
  78    we want to retain compatibility with older gcc versions.  */
  79
  80 #undef  DEFAULT_PCC_STRUCT_RETURN
  81 #define DEFAULT_PCC_STRUCT_RETURN 0
  82
  83 /* This table intercepts weirdo options whose names would interfere
  84    with normal driver conventions, and either translates them into
  85    standardly-named options, or adds a 'Z' so that they can get to
  86    specs processing without interference.
  87
  88    Do not expand a linker option to "-Xlinker -<option>", since that
  89    forfeits the ability to control via spec strings later.  However,
  90    as a special exception, do this translation with -filelist, because
  91    otherwise the driver will think there are no input files and quit.
  92    (The alternative would be to hack the driver to recognize -filelist
  93    specially, but it's simpler to use the translation table.)
  94
  95    Note that an option name with a prefix that matches another option
  96    name, that also takes an argument, needs to be modified so the
  97    prefix is different, otherwise a '*' after the shorter option will
  98    match with the longer one.
  99
 100    The SUBTARGET_OPTION_TRANSLATE_TABLE macro, which _must_ be defined
 101    in gcc/config/{i386,rs6000}/darwin.h, should contain any additional
 102    command-line option translations specific to the particular target
 103    architecture.  */
 104
 105 #define TARGET_OPTION_TRANSLATE_TABLE \
 106   { "-all_load", "-Zall_load" },  \
 107   { "-allowable_client", "-Zallowable_client" },  \
 108   { "-arch_errors_fatal", "-Zarch_errors_fatal" },  \
 109   { "-bind_at_load", "-Zbind_at_load" },  \
 110   { "-bundle", "-Zbundle" },  \
 111   { "-bundle_loader", "-Zbundle_loader" },  \
 112   { "-weak_reference_mismatches", "-Zweak_reference_mismatches" },  \
 113   { "-dead_strip", "-Zdead_strip" }, \
 114   { "-no_dead_strip_inits_and_terms", "-Zno_dead_strip_inits_and_terms" }, \
 115   { "-dependency-file", "-MF" }, \
 116   { "-dylib_file", "-Zdylib_file" }, \
 117   { "-dynamic", "-Zdynamic" },  \
 118   { "-dynamiclib", "-Zdynamiclib" },  \
 119   { "-exported_symbols_list", "-Zexported_symbols_list" },  \
 120   { "-gfull", "-g -fno-eliminate-unused-debug-symbols" }, \
 121   { "-gused", "-g -feliminate-unused-debug-symbols" }, \
 122   { "-segaddr", "-Zsegaddr" }, \
 123   { "-segs_read_only_addr", "-Zsegs_read_only_addr" }, \
 124   { "-segs_read_write_addr", "-Zsegs_read_write_addr" }, \
 125   { "-seg_addr_table", "-Zseg_addr_table" }, \
 126   { "-seg_addr_table_filename", "-Zseg_addr_table_filename" }, \
 127   { "-filelist", "-Xlinker -filelist -Xlinker" },  \
 128   { "-framework", "-Xlinker -framework -Xlinker" },  \
 129   { "-flat_namespace", "-Zflat_namespace" },  \
 130   { "-force_cpusubtype_ALL", "-Zforce_cpusubtype_ALL" },  \
 131   { "-force_flat_namespace", "-Zforce_flat_namespace" },  \
 132   { "-image_base", "-Zimage_base" },  \
 133   { "-init", "-Zinit" },  \
 134   { "-install_name", "-Zinstall_name" },  \
 135   { "-multiply_defined_unused", "-Zmultiplydefinedunused" },  \
 136   { "-multiply_defined", "-Zmultiply_defined" },  \
 137   { "-multi_module", "-Zmulti_module" },  \
 138   { "-static", "-static -Wa,-static" },  \
 139   { "-single_module", "-Zsingle_module" },  \
 140   { "-unexported_symbols_list", "-Zunexported_symbols_list" }, \
 141   SUBTARGET_OPTION_TRANSLATE_TABLE
 142
 143 /* These compiler options take n arguments.  */
 144
 145 #undef  WORD_SWITCH_TAKES_ARG
 146 #define WORD_SWITCH_TAKES_ARG(STR)              \
 147   (DEFAULT_WORD_SWITCH_TAKES_ARG (STR) ? 1 :    \
 148    !strcmp (STR, "Zallowable_client") ? 1 :     \
 149    !strcmp (STR, "arch") ? 1 :                  \
 150    !strcmp (STR, "arch_only") ? 1 :             \
 151    !strcmp (STR, "Zbundle_loader") ? 1 :        \
 152    !strcmp (STR, "client_name") ? 1 :           \
 153    !strcmp (STR, "compatibility_version") ? 1 : \
 154    !strcmp (STR, "current_version") ? 1 :       \
 155    !strcmp (STR, "Zdylib_file") ? 1 :           \
 156    !strcmp (STR, "Zexported_symbols_list") ? 1 : \
 157    !strcmp (STR, "Zimage_base") ? 1 :           \
 158    !strcmp (STR, "Zinit") ? 1 :                 \
 159    !strcmp (STR, "Zinstall_name") ? 1 :         \
 160    !strcmp (STR, "Zmultiplydefinedunused") ? 1 : \
 161    !strcmp (STR, "Zmultiply_defined") ? 1 :     \
 162    !strcmp (STR, "precomp-trustfile") ? 1 :     \
 163    !strcmp (STR, "read_only_relocs") ? 1 :      \
 164    !strcmp (STR, "sectcreate") ? 3 :            \
 165    !strcmp (STR, "sectorder") ? 3 :             \
 166    !strcmp (STR, "Zsegaddr") ? 2 :              \
 167    !strcmp (STR, "Zsegs_read_only_addr") ? 1 :  \
 168    !strcmp (STR, "Zsegs_read_write_addr") ? 1 : \
 169    !strcmp (STR, "Zseg_addr_table") ? 1 :       \
 170    !strcmp (STR, "Zseg_addr_table_filename") ?1 :\
 171    !strcmp (STR, "seg1addr") ? 1 :              \
 172    !strcmp (STR, "segprot") ? 3 :               \
 173    !strcmp (STR, "sub_library") ? 1 :           \
 174    !strcmp (STR, "sub_umbrella") ? 1 :          \
 175    !strcmp (STR, "umbrella") ? 1 :              \
 176    !strcmp (STR, "undefined") ? 1 :             \
 177    !strcmp (STR, "Zunexported_symbols_list") ? 1 : \
 178    !strcmp (STR, "Zweak_reference_mismatches") ? 1 : \
 179    !strcmp (STR, "pagezero_size") ? 1 :         \
 180    !strcmp (STR, "segs_read_only_addr") ? 1 :   \
 181    !strcmp (STR, "segs_read_write_addr") ? 1 :  \
 182    !strcmp (STR, "sectalign") ? 3 :             \
 183    !strcmp (STR, "sectobjectsymbols") ? 2 :     \
 184    !strcmp (STR, "segcreate") ? 3 :             \
 185    !strcmp (STR, "dylinker_install_name") ? 1 : \
 186    0)
 187
 188 /* Machine dependent cpp options.  Don't add more options here, add
 189    them to darwin_cpp_builtins in darwin-c.c.  */
 190
 191 #undef  CPP_SPEC
 192 #define CPP_SPEC "%{static:%{!dynamic:-D__STATIC__}}%{!static:-D__DYNAMIC__}"
 193
 194 /* This is mostly a clone of the standard LINK_COMMAND_SPEC, plus
 195    precomp, libtool, and fat build additions.  Also we
 196    don't specify a second %G after %L because libSystem is
 197    self-contained and doesn't need to link against libgcc.a.  */
 198 /* In general, random Darwin linker flags should go into LINK_SPEC
 199    instead of LINK_COMMAND_SPEC.  The command spec is better for
 200    specifying the handling of options understood by generic Unix
 201    linkers, and for positional arguments like libraries.  */
 202 #define LINK_COMMAND_SPEC "\
 203 %{!fdump=*:%{!fsyntax-only:%{!precomp:%{!c:%{!M:%{!MM:%{!E:%{!S:\
 204     %{!Zdynamiclib:%(linker)}%{Zdynamiclib:/usr/bin/libtool} \
 205     %l %X %{d} %{s} %{t} %{Z} \
 206     %{!Zdynamiclib:%{A} %{e*} %{m} %{N} %{n} %{r} %{u*} %{x} %{z}} \
 207     %{@:-o %f%u.out}%{!@:%{o*}%{!o:-o a.out}} \
 208     %{!Zdynamiclib:%{!A:%{!nostdlib:%{!nostartfiles:%S}}}} \
 209     %{L*} %(link_libgcc) %o %{fprofile-arcs|fprofile-generate|coverage:-lgcov} \
 210     %{!nostdlib:%{!nodefaultlibs:%(link_ssp) %G %L}} \
 211     %{!A:%{!nostdlib:%{!nostartfiles:%E}}} %{T*} %{F*} }}}}}}}}"
 212
 213 /* Please keep the random linker options in alphabetical order (modulo
 214    'Z' and 'no' prefixes).  Options that can only go to one of libtool
 215    or ld must be listed twice, under both !Zdynamiclib and
 216    Zdynamiclib, with one of the cases reporting an error.  */
 217 /* Note that options taking arguments may appear multiple times on a
 218    command line with different arguments each time, so put a * after
 219    their names so all of them get passed.  */
 220 #define LINK_SPEC  \
 221   "%{static}%{!static:-dynamic} \
 222    %{fgnu-runtime:%:replace-outfile(-lobjc -lobjc-gnu)}\
 223    %{!Zdynamiclib: \
 224      %{Zforce_cpusubtype_ALL:-arch %(darwin_arch) -force_cpusubtype_ALL} \
 225      %{!Zforce_cpusubtype_ALL:-arch %(darwin_subarch)} \
 226      %{Zbundle:-bundle} \
 227      %{Zbundle_loader*:-bundle_loader %*} \
 228      %{client_name*} \
 229      %{compatibility_version*:%e-compatibility_version only allowed with -dynamiclib\
 230 } \
 231      %{current_version*:%e-current_version only allowed with -dynamiclib} \
 232      %{Zforce_flat_namespace:-force_flat_namespace} \
 233      %{Zinstall_name*:%e-install_name only allowed with -dynamiclib} \
 234      %{keep_private_externs} \
 235      %{private_bundle} \
 236     } \
 237    %{Zdynamiclib: \
 238      %{Zbundle:%e-bundle not allowed with -dynamiclib} \
 239      %{Zbundle_loader*:%e-bundle_loader not allowed with -dynamiclib} \
 240      %{client_name*:%e-client_name not allowed with -dynamiclib} \
 241      %{compatibility_version*} \
 242      %{current_version*} \
 243      %{Zforce_cpusubtype_ALL:-arch_only %(darwin_arch)} \
 244      %{!Zforce_cpusubtype_ALL: -arch_only %(darwin_subarch)} \
 245      %{Zforce_flat_namespace:%e-force_flat_namespace not allowed with -dynamiclib} \
 246      %{Zinstall_name*:-install_name %*} \
 247      %{keep_private_externs:%e-keep_private_externs not allowed with -dynamiclib} \
 248      %{private_bundle:%e-private_bundle not allowed with -dynamiclib} \
 249     } \
 250    %{Zall_load:-all_load}%{Zdynamiclib:%{!Zall_load:-noall_load}} \
 251    %{Zallowable_client*:-allowable_client %*} \
 252    %{Zbind_at_load:-bind_at_load} \
 253    %{Zarch_errors_fatal:-arch_errors_fatal} \
 254    %{Zdead_strip:-dead_strip} \
 255    %{Zno_dead_strip_inits_and_terms:-no_dead_strip_inits_and_terms} \
 256    %{Zdylib_file*:-dylib_file %*} \
 257    %{Zdynamic:-dynamic}\
 258    %{Zexported_symbols_list*:-exported_symbols_list %*} \
 259    %{Zflat_namespace:-flat_namespace} \
 260    %{headerpad_max_install_names*} \
 261    %{Zimage_base*:-image_base %*} \
 262    %{Zinit*:-init %*} \
 263    %{mmacosx-version-min=*:-macosx_version_min %*} \
 264    %{nomultidefs} \
 265    %{Zmulti_module:-multi_module} %{Zsingle_module:-single_module} \
 266    %{Zmultiply_defined*:-multiply_defined %*} \
 267    %{Zmultiplydefinedunused*:-multiply_defined_unused %*} \
 268    %{prebind} %{noprebind} %{nofixprebinding} %{prebind_all_twolevel_modules} \
 269    %{read_only_relocs} \
 270    %{sectcreate*} %{sectorder*} %{seg1addr*} %{segprot*} \
 271    %{Zsegaddr*:-segaddr %*} \
 272    %{Zsegs_read_only_addr*:-segs_read_only_addr %*} \
 273    %{Zsegs_read_write_addr*:-segs_read_write_addr %*} \
 274    %{Zseg_addr_table*: -seg_addr_table %*} \
 275    %{Zseg_addr_table_filename*:-seg_addr_table_filename %*} \
 276    %{sub_library*} %{sub_umbrella*} \
 277    %{isysroot*:-syslibroot %*} \
 278    %{twolevel_namespace} %{twolevel_namespace_hints} \
 279    %{umbrella*} \
 280    %{undefined*} \
 281    %{Zunexported_symbols_list*:-unexported_symbols_list %*} \
 282    %{Zweak_reference_mismatches*:-weak_reference_mismatches %*} \
 283    %{!Zweak_reference_mismatches*:-weak_reference_mismatches non-weak} \
 284    %{X} \
 285    %{y*} \
 286    %{w} \
 287    %{pagezero_size*} %{segs_read_*} %{seglinkedit} %{noseglinkedit}  \
 288    %{sectalign*} %{sectobjectsymbols*} %{segcreate*} %{whyload} \
 289    %{whatsloaded} %{dylinker_install_name*} \
 290    %{dylinker} %{Mach} "
 291
 292
 293 /* Machine dependent libraries.  */
 294
 295 #define LIB_SPEC "%{!static:-lSystem}"
 296
 297 /* Support -mmacosx-version-min by supplying different (stub) libgcc_s.dylib
 298    libraries to link against, and by not linking against libgcc_s on
 299    earlier-than-10.3.9.
 300
 301    Note that by default, -lgcc_eh is not linked against!  This is
 302    because in a future version of Darwin the EH frame information may
 303    be in a new format, or the fallback routine might be changed; if
 304    you want to explicitly link against the static version of those
 305    routines, because you know you don't need to unwind through system
 306    libraries, you need to explicitly say -static-libgcc.
 307
 308    If it is linked against, it has to be before -lgcc, because it may
 309    need symbols from -lgcc.  */
 310 #undef REAL_LIBGCC_SPEC
 311 #define REAL_LIBGCC_SPEC                                                   \
 312    "%{static-libgcc|static: -lgcc_eh -lgcc;                                \
 313       shared-libgcc|fexceptions:                                           \
 314        %:version-compare(!> 10.5 mmacosx-version-min= -lgcc_s.10.4)        \
 315        %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_s.10.5)        \
 316        -lgcc;                                                              \
 317       :%:version-compare(>< 10.3.9 10.5 mmacosx-version-min= -lgcc_s.10.4) \
 318        %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_s.10.5)        \
 319        -lgcc}"
 320
 321 /* We specify crt0.o as -lcrt0.o so that ld will search the library path.  */
 322
 323 #undef  STARTFILE_SPEC
 324 #define STARTFILE_SPEC  \
 325   "%{!Zdynamiclib:%{Zbundle:%{!static:-lbundle1.o}} \
 326      %{!Zbundle:%{pg:%{static:-lgcrt0.o} \
 327                      %{!static:%{object:-lgcrt0.o} \
 328                                %{!object:%{preload:-lgcrt0.o} \
 329                                  %{!preload:-lgcrt1.o %(darwin_crt2)}}}} \
 330                 %{!pg:%{static:-lcrt0.o} \
 331                       %{!static:%{object:-lcrt0.o} \
 332                                 %{!object:%{preload:-lcrt0.o} \
 333                                   %{!preload:-lcrt1.o %(darwin_crt2)}}}}}}"
 334
 335 /* The native Darwin linker doesn't necessarily place files in the order
 336    that they're specified on the link line.  Thus, it is pointless
 337    to put anything in ENDFILE_SPEC.  */
 338 /* #define ENDFILE_SPEC "" */
 339
 340 /* Default Darwin ASM_SPEC, very simple.  */
 341 #define ASM_SPEC "-arch %(darwin_arch) \
 342   %{Zforce_cpusubtype_ALL:-force_cpusubtype_ALL}"
 343
 344 /* We use Dbx symbol format.  */
 345
 346 #define DBX_DEBUGGING_INFO 1
 347
 348 /* Also enable Dwarf 2 as an option.  */
 349 #define DWARF2_DEBUGGING_INFO
 350 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
 351
 352 #define DEBUG_FRAME_SECTION   "__DWARFA,__debug_frame,coalesced,no_toc+strip_static_syms"
 353 #define DEBUG_INFO_SECTION    "__DWARFA,__debug_info"
 354 #define DEBUG_ABBREV_SECTION  "__DWARFA,__debug_abbrev"
 355 #define DEBUG_ARANGES_SECTION "__DWARFA,__debug_aranges"
 356 #define DEBUG_MACINFO_SECTION "__DWARFA,__debug_macinfo"
 357 #define DEBUG_LINE_SECTION    "__DWARFA,__debug_line"
 358 #define DEBUG_LOC_SECTION     "__DWARFA,__debug_loc"
 359 #define DEBUG_PUBNAMES_SECTION        "__DWARFA,__debug_pubnames"
 360 #define DEBUG_STR_SECTION     "__DWARFA,__debug_str"
 361 #define DEBUG_RANGES_SECTION  "__DWARFA,__debug_ranges"
 362
 363 /* When generating stabs debugging, use N_BINCL entries.  */
 364
 365 #define DBX_USE_BINCL
 366
 367 /* There is no limit to the length of stabs strings.  */
 368
 369 #define DBX_CONTIN_LENGTH 0
 370
 371 /* gdb needs a null N_SO at the end of each file for scattered loading.  */
 372
 373 #define DBX_OUTPUT_NULL_N_SO_AT_MAIN_SOURCE_FILE_END
 374
 375 /* GCC's definition of 'one_only' is the same as its definition of 'weak'.  */
 376 #define MAKE_DECL_ONE_ONLY(DECL) (DECL_WEAK (DECL) = 1)
 377
 378 /* Mach-O supports 'weak imports', and 'weak definitions' in coalesced
 379    sections.  machopic_select_section ensures that weak variables go in
 380    coalesced sections.  Weak aliases (or any other kind of aliases) are
 381    not supported.  Weak symbols that aren't visible outside the .s file
 382    are not supported.  */
 383 #define ASM_WEAKEN_DECL(FILE, DECL, NAME, ALIAS)                        \
 384   do {                                                                  \
 385     if (ALIAS)                                                          \
 386       {                                                                 \
 387         warning (0, "alias definitions not supported in Mach-O; ignored");      \
 388         break;                                                          \
 389       }                                                                 \
 390                                                                         \
 391     if (! DECL_EXTERNAL (DECL) && TREE_PUBLIC (DECL))                   \
 392       targetm.asm_out.globalize_label (FILE, NAME);                     \
 393     if (DECL_EXTERNAL (DECL))                                           \
 394       fputs ("\t.weak_reference ", FILE);                               \
 395     else if (! lookup_attribute ("weak", DECL_ATTRIBUTES (DECL))        \
 396         && lookup_attribute ("weak_import", DECL_ATTRIBUTES (DECL)))    \
 397       break;                                                            \
 398     else if (TREE_PUBLIC (DECL))                                        \
 399       fputs ("\t.weak_definition ", FILE);                              \
 400     else                                                                \
 401       break;                                                            \
 402     assemble_name (FILE, NAME);                                         \
 403     fputc ('\n', FILE);                                                 \
 404   } while (0)
 405
 406 /* Darwin has the pthread routines in libSystem, which every program
 407    links to, so there's no need for weak-ness for that.  */
 408 #define GTHREAD_USE_WEAK 0
 409
 410 /* The Darwin linker imposes two limitations on common symbols: they
 411    can't have hidden visibility, and they can't appear in dylibs.  As
 412    a consequence, we should never use common symbols to represent
 413    vague linkage. */
 414 #undef USE_COMMON_FOR_ONE_ONLY
 415 #define USE_COMMON_FOR_ONE_ONLY 0
 416
 417 /* The Darwin linker doesn't want coalesced symbols to appear in
 418    a static archive's table of contents. */
 419 #undef TARGET_WEAK_NOT_IN_ARCHIVE_TOC
 420 #define TARGET_WEAK_NOT_IN_ARCHIVE_TOC 1
 421
 422 /* On Darwin, we don't (at the time of writing) have linkonce sections
 423    with names, so it's safe to make the class data not comdat.  */
 424 #define TARGET_CXX_CLASS_DATA_ALWAYS_COMDAT hook_bool_void_false
 425
 426 /* We make exception information linkonce. */
 427 #undef TARGET_USES_WEAK_UNWIND_INFO
 428 #define TARGET_USES_WEAK_UNWIND_INFO 1
 429
 430 /* We need to use a nonlocal label for the start of an EH frame: the
 431    Darwin linker requires that a coalesced section start with a label. */
 432 #undef FRAME_BEGIN_LABEL
 433 #define FRAME_BEGIN_LABEL "EH_frame"
 434
 435 /* Emit a label for the FDE corresponding to DECL.  EMPTY means
 436    emit a label for an empty FDE. */
 437 #define TARGET_ASM_EMIT_UNWIND_LABEL darwin_emit_unwind_label
 438
 439 /* Our profiling scheme doesn't LP labels and counter words.  */
 440
 441 #define NO_PROFILE_COUNTERS     1
 442
 443 #undef  INIT_SECTION_ASM_OP
 444 #define HAS_INIT_SECTION
 445
 446 #undef  INVOKE__main
 447
 448 #define TARGET_ASM_CONSTRUCTOR  machopic_asm_out_constructor
 449 #define TARGET_ASM_DESTRUCTOR   machopic_asm_out_destructor
 450
 451 /* Always prefix with an underscore.  */
 452
 453 #define USER_LABEL_PREFIX "_"
 454
 455 /* Don't output a .file directive.  That is only used by the assembler for
 456    error reporting.  */
 457 #undef  TARGET_ASM_FILE_START_FILE_DIRECTIVE
 458 #define TARGET_ASM_FILE_START_FILE_DIRECTIVE false
 459
 460 #undef  TARGET_ASM_FILE_END
 461 #define TARGET_ASM_FILE_END darwin_file_end
 462
 463 #define ASM_OUTPUT_SKIP(FILE,SIZE)  \
 464   fprintf (FILE, "\t.space "HOST_WIDE_INT_PRINT_UNSIGNED"\n", SIZE)
 465
 466 /* Give ObjC methods pretty symbol names.  */
 467
 468 #undef  OBJC_GEN_METHOD_LABEL
 469 #define OBJC_GEN_METHOD_LABEL(BUF,IS_INST,CLASS_NAME,CAT_NAME,SEL_NAME,NUM) \
 470   do { if (CAT_NAME)                                                    \
 471          sprintf (BUF, "%c[%s(%s) %s]", (IS_INST) ? '-' : '+',          \
 472                   (CLASS_NAME), (CAT_NAME), (SEL_NAME));                \
 473        else                                                             \
 474          sprintf (BUF, "%c[%s %s]", (IS_INST) ? '-' : '+',              \
 475                   (CLASS_NAME), (SEL_NAME));                            \
 476      } while (0)
 477
 478 /* The RTTI data (e.g., __ti4name) is common and public (and static),
 479    but it does need to be referenced via indirect PIC data pointers.
 480    The machopic_define_symbol calls are telling the machopic subsystem
 481    that the name *is* defined in this module, so it doesn't need to
 482    make them indirect.  */
 483
 484 #undef ASM_DECLARE_OBJECT_NAME
 485 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL)                       \
 486   do {                                                                  \
 487     const char *xname = NAME;                                           \
 488     if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF)             \
 489       xname = IDENTIFIER_POINTER (DECL_NAME (DECL));                    \
 490     if (! DECL_WEAK (DECL)                                              \
 491         && ((TREE_STATIC (DECL)                                         \
 492              && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))           \
 493             || DECL_INITIAL (DECL)))                                    \
 494         machopic_define_symbol (DECL_RTL (DECL));                       \
 495     if ((TREE_STATIC (DECL)                                             \
 496          && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))               \
 497         || DECL_INITIAL (DECL))                                         \
 498       (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false);   \
 499     ASM_OUTPUT_LABEL (FILE, xname);                                     \
 500     /* Darwin doesn't support zero-size objects, so give them a         \
 501        byte.  */                                                        \
 502     if (tree_low_cst (DECL_SIZE_UNIT (DECL), 1) == 0)                   \
 503       assemble_zeros (1);                                               \
 504   } while (0)
 505
 506 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL)                     \
 507   do {                                                                  \
 508     const char *xname = NAME;                                           \
 509     if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF)             \
 510       xname = IDENTIFIER_POINTER (DECL_NAME (DECL));                    \
 511     if (! DECL_WEAK (DECL)                                              \
 512         && ((TREE_STATIC (DECL)                                         \
 513              && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))           \
 514             || DECL_INITIAL (DECL)))                                    \
 515         machopic_define_symbol (DECL_RTL (DECL));                       \
 516     if ((TREE_STATIC (DECL)                                             \
 517          && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))               \
 518         || DECL_INITIAL (DECL))                                         \
 519       (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false);   \
 520     ASM_OUTPUT_LABEL (FILE, xname);                                     \
 521   } while (0)
 522
 523 #define ASM_DECLARE_CONSTANT_NAME(FILE, NAME, EXP, SIZE)        \
 524   do {                                                          \
 525     ASM_OUTPUT_LABEL (FILE, NAME);                              \
 526     /* Darwin doesn't support zero-size objects, so give them a \
 527        byte.  */                                                \
 528     if ((SIZE) == 0)                                            \
 529       assemble_zeros (1);                                       \
 530   } while (0)
 531
 532 /* Wrap new method names in quotes so the assembler doesn't gag.
 533    Make Objective-C internal symbols local.  */
 534
 535 #undef  ASM_OUTPUT_LABELREF
 536 #define ASM_OUTPUT_LABELREF(FILE,NAME)                                       \
 537   do {                                                                       \
 538        const char *xname = (NAME);                                           \
 539        if (! strcmp (xname, "<pic base>"))                                   \
 540          machopic_output_function_base_name(FILE);                           \
 541        else if (xname[0] == '&' || xname[0] == '*')                          \
 542          {                                                                   \
 543            int len = strlen (xname);                                         \
 544            if (len > 6 && !strcmp ("$stub", xname + len - 5))                \
 545              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 546            else if (len > 7 && !strcmp ("$stub\"", xname + len - 6))         \
 547              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 548            else if (len > 14 && !strcmp ("$non_lazy_ptr", xname + len - 13)) \
 549              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 550            else if (len > 15 && !strcmp ("$non_lazy_ptr\"", xname + len - 14)) \
 551              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 552            if (xname[1] != '"' && name_needs_quotes (&xname[1]))             \
 553              fprintf (FILE, "\"%s\"", &xname[1]);                            \
 554            else                                                              \
 555              fputs (&xname[1], FILE);                                        \
 556          }                                                                   \
 557        else if (xname[0] == '+' || xname[0] == '-')                          \
 558          fprintf (FILE, "\"%s\"", xname);                                    \
 559        else if (!strncmp (xname, "_OBJC_", 6))                               \
 560          fprintf (FILE, "L%s", xname);                                       \
 561        else if (!strncmp (xname, ".objc_class_name_", 17))                   \
 562          fprintf (FILE, "%s", xname);                                        \
 563        else if (xname[0] != '"' && name_needs_quotes (xname))                \
 564          fprintf (FILE, "\"%s\"", xname);                                    \
 565        else                                                                  \
 566          asm_fprintf (FILE, "%U%s", xname);                                  \
 567   } while (0)
 568
 569 /* Output before executable code.  */
 570 #undef TEXT_SECTION_ASM_OP
 571 #define TEXT_SECTION_ASM_OP "\t.text"
 572
 573 /* Output before writable data.  */
 574
 575 #undef DATA_SECTION_ASM_OP
 576 #define DATA_SECTION_ASM_OP "\t.data"
 577
 578 #undef  ALIGN_ASM_OP
 579 #define ALIGN_ASM_OP            ".align"
 580
 581 #undef  ASM_OUTPUT_ALIGN
 582 #define ASM_OUTPUT_ALIGN(FILE,LOG)      \
 583   if ((LOG) != 0)                       \
 584     fprintf (FILE, "\t%s %d\n", ALIGN_ASM_OP, (LOG))
 585
 586 /* Ensure correct alignment of bss data.  */
 587
 588 #undef  ASM_OUTPUT_ALIGNED_DECL_LOCAL
 589 #define ASM_OUTPUT_ALIGNED_DECL_LOCAL(FILE, DECL, NAME, SIZE, ALIGN)    \
 590   do {                                                                  \
 591     unsigned HOST_WIDE_INT _new_size = SIZE;                            \
 592     fputs (".lcomm ", (FILE));                                          \
 593     assemble_name ((FILE), (NAME));                                     \
 594     if (_new_size == 0) _new_size = 1;                                  \
 595     fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED",%u\n", _new_size, \
 596              floor_log2 ((ALIGN) / BITS_PER_UNIT));                     \
 597     if ((DECL) && ((TREE_STATIC (DECL)                                  \
 598          && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))               \
 599         || DECL_INITIAL (DECL)))                                        \
 600       {                                                                 \
 601         (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false); \
 602         machopic_define_symbol (DECL_RTL (DECL));                       \
 603       }                                                                 \
 604   } while (0)
 605
 606 /* The maximum alignment which the object file format can support.
 607    For Mach-O, this is 2^15.  */
 608
 609 #undef  MAX_OFILE_ALIGNMENT
 610 #define MAX_OFILE_ALIGNMENT 0x8000
 611
 612 /* Declare the section variables.  */
 613 #define DEF_SECTION(NAME, FLAGS, DIRECTIVE, OBJC) extern section *NAME;
 614 #include "darwin-sections.def"
 615 #undef DEF_SECTION
 616
 617 #undef  TARGET_ASM_SELECT_SECTION
 618 #define TARGET_ASM_SELECT_SECTION machopic_select_section
 619 #define USE_SELECT_SECTION_FOR_FUNCTIONS
 620
 621 #undef  TARGET_ASM_SELECT_RTX_SECTION
 622 #define TARGET_ASM_SELECT_RTX_SECTION machopic_select_rtx_section
 623 #undef  TARGET_ASM_UNIQUE_SECTION
 624 #define TARGET_ASM_UNIQUE_SECTION darwin_unique_section
 625 #undef  TARGET_ASM_FUNCTION_RODATA_SECTION
 626 #define TARGET_ASM_FUNCTION_RODATA_SECTION default_no_function_rodata_section
 627
 628
 629 #define ASM_DECLARE_UNRESOLVED_REFERENCE(FILE,NAME)                     \
 630     do {                                                                \
 631          if (FILE) {                                                    \
 632            if (MACHOPIC_INDIRECT)                                       \
 633              fprintf (FILE, "\t.lazy_reference ");                      \
 634            else                                                         \
 635              fprintf (FILE, "\t.reference ");                           \
 636            assemble_name (FILE, NAME);                                  \
 637            fprintf (FILE, "\n");                                        \
 638          }                                                              \
 639        } while (0)
 640
 641 #define ASM_DECLARE_CLASS_REFERENCE(FILE,NAME)                          \
 642     do {                                                                \
 643          if (FILE) {                                                    \
 644            fprintf (FILE, "\t");                                        \
 645            assemble_name (FILE, NAME);                                  \
 646            fprintf (FILE, "=0\n");                                      \
 647            (*targetm.asm_out.globalize_label) (FILE, NAME);             \
 648          }                                                              \
 649        } while (0)
 650
 651 /* Globalizing directive for a label.  */
 652 #define GLOBAL_ASM_OP ".globl "
 653 #define TARGET_ASM_GLOBALIZE_LABEL darwin_globalize_label
 654
 655 /* Emit an assembler directive to set visibility for a symbol.  Used
 656    to support visibility attribute and Darwin's private extern
 657    feature.  */
 658 #undef TARGET_ASM_ASSEMBLE_VISIBILITY
 659 #define TARGET_ASM_ASSEMBLE_VISIBILITY darwin_assemble_visibility
 660
 661 /* Extra attributes for Darwin.  */
 662 #define SUBTARGET_ATTRIBUTE_TABLE                                            \
 663   /* { name, min_len, max_len, decl_req, type_req, fn_type_req, handler } */ \
 664   { "weak_import", 0, 0, true, false, false,                                 \
 665     darwin_handle_weak_import_attribute }
 666
 667 #undef ASM_GENERATE_INTERNAL_LABEL
 668 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM)   \
 669   sprintf (LABEL, "*%s%ld", PREFIX, (long)(NUM))
 670
 671 #undef TARGET_ASM_MARK_DECL_PRESERVED
 672 #define TARGET_ASM_MARK_DECL_PRESERVED darwin_mark_decl_preserved
 673
 674 /* Set on a symbol with SYMBOL_FLAG_FUNCTION or
 675    MACHO_SYMBOL_FLAG_VARIABLE to indicate that the function or
 676    variable has been defined in this translation unit.  */
 677
 678 #define MACHO_SYMBOL_FLAG_VARIABLE (SYMBOL_FLAG_MACH_DEP)
 679 #define MACHO_SYMBOL_FLAG_DEFINED ((SYMBOL_FLAG_MACH_DEP) << 1)
 680
 681 /* Set on a symbol to indicate when fix-and-continue style code
 682    generation is being used and the symbol refers to a static symbol
 683    that should be rebound from new instances of a translation unit to
 684    the original instance of the data.  */
 685
 686 #define MACHO_SYMBOL_STATIC ((SYMBOL_FLAG_MACH_DEP) << 2)
 687
 688 /* Symbolic names for various things we might know about a symbol.  */
 689
 690 enum machopic_addr_class {
 691   MACHOPIC_UNDEFINED,
 692   MACHOPIC_DEFINED_DATA,
 693   MACHOPIC_UNDEFINED_DATA,
 694   MACHOPIC_DEFINED_FUNCTION,
 695   MACHOPIC_UNDEFINED_FUNCTION
 696 };
 697
 698 /* Macros defining the various PIC cases.  */
 699
 700 #define MACHO_DYNAMIC_NO_PIC_P  (TARGET_DYNAMIC_NO_PIC)
 701 #define MACHOPIC_INDIRECT       (flag_pic || MACHO_DYNAMIC_NO_PIC_P)
 702 #define MACHOPIC_JUST_INDIRECT  (flag_pic == 1 || MACHO_DYNAMIC_NO_PIC_P)
 703 #define MACHOPIC_PURE           (flag_pic == 2 && ! MACHO_DYNAMIC_NO_PIC_P)
 704
 705 #undef TARGET_ENCODE_SECTION_INFO
 706 #define TARGET_ENCODE_SECTION_INFO  darwin_encode_section_info
 707 #undef TARGET_STRIP_NAME_ENCODING
 708 #define TARGET_STRIP_NAME_ENCODING  default_strip_name_encoding
 709
 710 #define GEN_BINDER_NAME_FOR_STUB(BUF,STUB,STUB_LENGTH)          \
 711   do {                                                          \
 712     const char *const stub_ = (STUB);                           \
 713     char *buffer_ = (BUF);                                      \
 714     strcpy (buffer_, stub_);                                    \
 715     if (stub_[0] == '"')                                        \
 716       {                                                         \
 717         strcpy (buffer_ + (STUB_LENGTH) - 1, "_binder\"");      \
 718       }                                                         \
 719     else                                                        \
 720       {                                                         \
 721         strcpy (buffer_ + (STUB_LENGTH), "_binder");            \
 722       }                                                         \
 723   } while (0)
 724
 725 #define GEN_SYMBOL_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH)    \
 726   do {                                                          \
 727     const char *const symbol_ = (SYMBOL);                       \
 728     char *buffer_ = (BUF);                                      \
 729     if (name_needs_quotes (symbol_) && symbol_[0] != '"')       \
 730       {                                                         \
 731           sprintf (buffer_, "\"%s\"", symbol_);                 \
 732       }                                                         \
 733     else                                                        \
 734       {                                                         \
 735         strcpy (buffer_, symbol_);                              \
 736       }                                                         \
 737   } while (0)
 738
 739 /* Given a symbol name string, create the lazy pointer version
 740    of the symbol name.  */
 741
 742 #define GEN_LAZY_PTR_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH)  \
 743   do {                                                          \
 744     const char *symbol_ = (SYMBOL);                             \
 745     char *buffer_ = (BUF);                                      \
 746     if (symbol_[0] == '"')                                      \
 747       {                                                         \
 748         strcpy (buffer_, "\"L");                                \
 749         strcpy (buffer_ + 2, symbol_ + 1);                      \
 750         strcpy (buffer_ + (SYMBOL_LENGTH), "$lazy_ptr\"");      \
 751       }                                                         \
 752     else if (name_needs_quotes (symbol_))                       \
 753       {                                                         \
 754         strcpy (buffer_, "\"L");                                \
 755         strcpy (buffer_ + 2, symbol_);                          \
 756         strcpy (buffer_ + (SYMBOL_LENGTH) + 2, "$lazy_ptr\"");  \
 757       }                                                         \
 758     else                                                        \
 759       {                                                         \
 760         strcpy (buffer_, "L");                                  \
 761         strcpy (buffer_ + 1, symbol_);                          \
 762         strcpy (buffer_ + (SYMBOL_LENGTH) + 1, "$lazy_ptr");    \
 763       }                                                         \
 764   } while (0)
 765
 766 #define EH_FRAME_SECTION_NAME   "__TEXT"
 767 #define EH_FRAME_SECTION_ATTR ",coalesced,no_toc+strip_static_syms+live_support"
 768
 769 /* Java runtime class list.  */
 770 #define JCR_SECTION_NAME "__DATA,jcr,regular,no_dead_strip"
 771
 772 #undef ASM_PREFERRED_EH_DATA_FORMAT
 773 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL)  \
 774   (((CODE) == 2 && (GLOBAL) == 1) \
 775    ? (DW_EH_PE_pcrel | DW_EH_PE_indirect | DW_EH_PE_sdata4) : \
 776      ((CODE) == 1 || (GLOBAL) == 0) ? DW_EH_PE_pcrel : DW_EH_PE_absptr)
 777
 778 #define ASM_OUTPUT_DWARF_DELTA(FILE,SIZE,LABEL1,LABEL2)  \
 779   darwin_asm_output_dwarf_delta (FILE, SIZE, LABEL1, LABEL2)
 780
 781 #define ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX(ASM_OUT_FILE, ENCODING, SIZE, ADDR, DONE)     \
 782       if (ENCODING == ASM_PREFERRED_EH_DATA_FORMAT (2, 1)) {                            \
 783         darwin_non_lazy_pcrel (ASM_OUT_FILE, ADDR);                                     \
 784         goto DONE;                                                                      \
 785       }
 786
 787 /* Experimentally, putting jump tables in text is faster on SPEC.
 788    Also this is needed for correctness for coalesced functions.  */
 789
 790 #ifndef JUMP_TABLES_IN_TEXT_SECTION
 791 #define JUMP_TABLES_IN_TEXT_SECTION 1
 792 #endif
 793
 794 #define TARGET_TERMINATE_DW2_EH_FRAME_INFO false
 795
 796 #define TARGET_ASM_INIT_SECTIONS darwin_init_sections
 797 #undef TARGET_ASM_NAMED_SECTION
 798 #define TARGET_ASM_NAMED_SECTION darwin_asm_named_section
 799
 800 #define DARWIN_REGISTER_TARGET_PRAGMAS()                        \
 801   do {                                                          \
 802     c_register_pragma (0, "mark", darwin_pragma_ignore);        \
 803     c_register_pragma (0, "options", darwin_pragma_options);    \
 804     c_register_pragma (0, "segment", darwin_pragma_ignore);     \
 805     c_register_pragma (0, "unused", darwin_pragma_unused);      \
 806   } while (0)
 807
 808 #undef ASM_APP_ON
 809 #define ASM_APP_ON ""
 810 #undef ASM_APP_OFF
 811 #define ASM_APP_OFF ""
 812
 813 void darwin_register_frameworks (const char *, const char *, int);
 814 void darwin_register_objc_includes (const char *, const char *, int);
 815 #define TARGET_EXTRA_PRE_INCLUDES darwin_register_objc_includes
 816 #define TARGET_EXTRA_INCLUDES darwin_register_frameworks
 817
 818 void add_framework_path (char *);
 819 #define TARGET_OPTF add_framework_path
 820
 821 #define TARGET_POSIX_IO
 822
 823 /* All new versions of Darwin have C99 functions.  */
 824 #define TARGET_C99_FUNCTIONS 1
 825
 826 #define WINT_TYPE "int"
 827
 828 #endif /* CONFIG_DARWIN_H */