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 #define SUBTARGET_OS_CPP_BUILTINS()                     \
 144   do                                                    \
 145     {                                                   \
 146       if (flag_pic)                                     \
 147         builtin_define ("__PIC__");                     \
 148     }                                                   \
 149   while (0)
 150
 151 /* These compiler options take n arguments.  */
 152
 153 #undef  WORD_SWITCH_TAKES_ARG
 154 #define WORD_SWITCH_TAKES_ARG(STR)              \
 155   (DEFAULT_WORD_SWITCH_TAKES_ARG (STR) ? 1 :    \
 156    !strcmp (STR, "Zallowable_client") ? 1 :     \
 157    !strcmp (STR, "arch") ? 1 :                  \
 158    !strcmp (STR, "arch_only") ? 1 :             \
 159    !strcmp (STR, "Zbundle_loader") ? 1 :        \
 160    !strcmp (STR, "client_name") ? 1 :           \
 161    !strcmp (STR, "compatibility_version") ? 1 : \
 162    !strcmp (STR, "current_version") ? 1 :       \
 163    !strcmp (STR, "Zdylib_file") ? 1 :           \
 164    !strcmp (STR, "Zexported_symbols_list") ? 1 : \
 165    !strcmp (STR, "Zimage_base") ? 1 :           \
 166    !strcmp (STR, "Zinit") ? 1 :                 \
 167    !strcmp (STR, "Zinstall_name") ? 1 :         \
 168    !strcmp (STR, "Zmultiplydefinedunused") ? 1 : \
 169    !strcmp (STR, "Zmultiply_defined") ? 1 :     \
 170    !strcmp (STR, "precomp-trustfile") ? 1 :     \
 171    !strcmp (STR, "read_only_relocs") ? 1 :      \
 172    !strcmp (STR, "sectcreate") ? 3 :            \
 173    !strcmp (STR, "sectorder") ? 3 :             \
 174    !strcmp (STR, "Zsegaddr") ? 2 :              \
 175    !strcmp (STR, "Zsegs_read_only_addr") ? 1 :  \
 176    !strcmp (STR, "Zsegs_read_write_addr") ? 1 : \
 177    !strcmp (STR, "Zseg_addr_table") ? 1 :       \
 178    !strcmp (STR, "Zseg_addr_table_filename") ?1 :\
 179    !strcmp (STR, "seg1addr") ? 1 :              \
 180    !strcmp (STR, "segprot") ? 3 :               \
 181    !strcmp (STR, "sub_library") ? 1 :           \
 182    !strcmp (STR, "sub_umbrella") ? 1 :          \
 183    !strcmp (STR, "umbrella") ? 1 :              \
 184    !strcmp (STR, "undefined") ? 1 :             \
 185    !strcmp (STR, "Zunexported_symbols_list") ? 1 : \
 186    !strcmp (STR, "Zweak_reference_mismatches") ? 1 : \
 187    !strcmp (STR, "pagezero_size") ? 1 :         \
 188    !strcmp (STR, "segs_read_only_addr") ? 1 :   \
 189    !strcmp (STR, "segs_read_write_addr") ? 1 :  \
 190    !strcmp (STR, "sectalign") ? 3 :             \
 191    !strcmp (STR, "sectobjectsymbols") ? 2 :     \
 192    !strcmp (STR, "segcreate") ? 3 :             \
 193    !strcmp (STR, "dylinker_install_name") ? 1 : \
 194    0)
 195
 196 /* Machine dependent cpp options.  Don't add more options here, add
 197    them to darwin_cpp_builtins in darwin-c.c.  */
 198
 199 #undef  CPP_SPEC
 200 #define CPP_SPEC "%{static:%{!dynamic:-D__STATIC__}}%{!static:-D__DYNAMIC__}"
 201
 202 /* This is mostly a clone of the standard LINK_COMMAND_SPEC, plus
 203    precomp, libtool, and fat build additions.  Also we
 204    don't specify a second %G after %L because libSystem is
 205    self-contained and doesn't need to link against libgcc.a.  */
 206 /* In general, random Darwin linker flags should go into LINK_SPEC
 207    instead of LINK_COMMAND_SPEC.  The command spec is better for
 208    specifying the handling of options understood by generic Unix
 209    linkers, and for positional arguments like libraries.  */
 210 #define LINK_COMMAND_SPEC "\
 211 %{!fdump=*:%{!fsyntax-only:%{!precomp:%{!c:%{!M:%{!MM:%{!E:%{!S:\
 212     %{!Zdynamiclib:%(linker)}%{Zdynamiclib:/usr/bin/libtool} \
 213     %l %X %{d} %{s} %{t} %{Z} \
 214     %{!Zdynamiclib:%{A} %{e*} %{m} %{N} %{n} %{r} %{u*} %{x} %{z}} \
 215     %{@:-o %f%u.out}%{!@:%{o*}%{!o:-o a.out}} \
 216     %{!Zdynamiclib:%{!A:%{!nostdlib:%{!nostartfiles:%S}}}} \
 217     %{L*} %(link_libgcc) %o %{fprofile-arcs|fprofile-generate|coverage:-lgcov} \
 218     %{!nostdlib:%{!nodefaultlibs:%(link_ssp) %G %L}} \
 219     %{!A:%{!nostdlib:%{!nostartfiles:%E}}} %{T*} %{F*} }}}}}}}}"
 220
 221 /* Please keep the random linker options in alphabetical order (modulo
 222    'Z' and 'no' prefixes).  Options that can only go to one of libtool
 223    or ld must be listed twice, under both !Zdynamiclib and
 224    Zdynamiclib, with one of the cases reporting an error.  */
 225 /* Note that options taking arguments may appear multiple times on a
 226    command line with different arguments each time, so put a * after
 227    their names so all of them get passed.  */
 228 #define LINK_SPEC  \
 229   "%{static}%{!static:-dynamic} \
 230    %{fgnu-runtime:%:replace-outfile(-lobjc -lobjc-gnu)}\
 231    %{!Zdynamiclib: \
 232      %{Zforce_cpusubtype_ALL:-arch %(darwin_arch) -force_cpusubtype_ALL} \
 233      %{!Zforce_cpusubtype_ALL:-arch %(darwin_subarch)} \
 234      %{Zbundle:-bundle} \
 235      %{Zbundle_loader*:-bundle_loader %*} \
 236      %{client_name*} \
 237      %{compatibility_version*:%e-compatibility_version only allowed with -dynamiclib\
 238 } \
 239      %{current_version*:%e-current_version only allowed with -dynamiclib} \
 240      %{Zforce_flat_namespace:-force_flat_namespace} \
 241      %{Zinstall_name*:%e-install_name only allowed with -dynamiclib} \
 242      %{keep_private_externs} \
 243      %{private_bundle} \
 244     } \
 245    %{Zdynamiclib: \
 246      %{Zbundle:%e-bundle not allowed with -dynamiclib} \
 247      %{Zbundle_loader*:%e-bundle_loader not allowed with -dynamiclib} \
 248      %{client_name*:%e-client_name not allowed with -dynamiclib} \
 249      %{compatibility_version*} \
 250      %{current_version*} \
 251      %{Zforce_cpusubtype_ALL:-arch_only %(darwin_arch)} \
 252      %{!Zforce_cpusubtype_ALL: -arch_only %(darwin_subarch)} \
 253      %{Zforce_flat_namespace:%e-force_flat_namespace not allowed with -dynamiclib} \
 254      %{Zinstall_name*:-install_name %*} \
 255      %{keep_private_externs:%e-keep_private_externs not allowed with -dynamiclib} \
 256      %{private_bundle:%e-private_bundle not allowed with -dynamiclib} \
 257     } \
 258    %{Zall_load:-all_load}%{Zdynamiclib:%{!Zall_load:-noall_load}} \
 259    %{Zallowable_client*:-allowable_client %*} \
 260    %{Zbind_at_load:-bind_at_load} \
 261    %{Zarch_errors_fatal:-arch_errors_fatal} \
 262    %{Zdead_strip:-dead_strip} \
 263    %{Zno_dead_strip_inits_and_terms:-no_dead_strip_inits_and_terms} \
 264    %{Zdylib_file*:-dylib_file %*} \
 265    %{Zdynamic:-dynamic}\
 266    %{Zexported_symbols_list*:-exported_symbols_list %*} \
 267    %{Zflat_namespace:-flat_namespace} \
 268    %{headerpad_max_install_names*} \
 269    %{Zimage_base*:-image_base %*} \
 270    %{Zinit*:-init %*} \
 271    %{mmacosx-version-min=*:-macosx_version_min %*} \
 272    %{nomultidefs} \
 273    %{Zmulti_module:-multi_module} %{Zsingle_module:-single_module} \
 274    %{Zmultiply_defined*:-multiply_defined %*} \
 275    %{Zmultiplydefinedunused*:-multiply_defined_unused %*} \
 276    %{prebind} %{noprebind} %{nofixprebinding} %{prebind_all_twolevel_modules} \
 277    %{read_only_relocs} \
 278    %{sectcreate*} %{sectorder*} %{seg1addr*} %{segprot*} \
 279    %{Zsegaddr*:-segaddr %*} \
 280    %{Zsegs_read_only_addr*:-segs_read_only_addr %*} \
 281    %{Zsegs_read_write_addr*:-segs_read_write_addr %*} \
 282    %{Zseg_addr_table*: -seg_addr_table %*} \
 283    %{Zseg_addr_table_filename*:-seg_addr_table_filename %*} \
 284    %{sub_library*} %{sub_umbrella*} \
 285    %{isysroot*:-syslibroot %*} \
 286    %{twolevel_namespace} %{twolevel_namespace_hints} \
 287    %{umbrella*} \
 288    %{undefined*} \
 289    %{Zunexported_symbols_list*:-unexported_symbols_list %*} \
 290    %{Zweak_reference_mismatches*:-weak_reference_mismatches %*} \
 291    %{!Zweak_reference_mismatches*:-weak_reference_mismatches non-weak} \
 292    %{X} \
 293    %{y*} \
 294    %{w} \
 295    %{pagezero_size*} %{segs_read_*} %{seglinkedit} %{noseglinkedit}  \
 296    %{sectalign*} %{sectobjectsymbols*} %{segcreate*} %{whyload} \
 297    %{whatsloaded} %{dylinker_install_name*} \
 298    %{dylinker} %{Mach} "
 299
 300
 301 /* Machine dependent libraries.  */
 302
 303 #define LIB_SPEC "%{!static:-lSystem}"
 304
 305 /* -dynamiclib implies -shared-libgcc just like -shared would on linux.  */
 306 #define REAL_LIBGCC_SPEC \
 307    "%{static|static-libgcc:-lgcc -lgcc_eh}\
 308     %{!static:%{!static-libgcc:\
 309       %{!Zdynamiclib:%{!shared-libgcc:-lgcc -lgcc_eh}\
 310       %{shared-libgcc:-lgcc_s -lgcc}} %{Zdynamiclib:-lgcc_s -lgcc}}}"
 311
 312 /* We specify crt0.o as -lcrt0.o so that ld will search the library path.  */
 313 /* We don't want anything to do with crt2.o in the 64-bit case;
 314    testing the PowerPC-specific -m64 flag here is a little irregular,
 315    but it's overkill to make copies of this spec for each target
 316    arch.  */
 317
 318 #undef  STARTFILE_SPEC
 319 #define STARTFILE_SPEC  \
 320   "%{!Zdynamiclib:%{Zbundle:%{!static:-lbundle1.o}} \
 321      %{!Zbundle:%{pg:%{static:-lgcrt0.o} \
 322                      %{!static:%{object:-lgcrt0.o} \
 323                                %{!object:%{preload:-lgcrt0.o} \
 324                                  %{!preload:-lgcrt1.o %{!m64: crt2.o%s}}}}} \
 325                 %{!pg:%{static:-lcrt0.o} \
 326                       %{!static:%{object:-lcrt0.o} \
 327                                 %{!object:%{preload:-lcrt0.o} \
 328                                   %{!preload:-lcrt1.o %{!m64: crt2.o%s}}}}}}}"
 329
 330 /* The native Darwin linker doesn't necessarily place files in the order
 331    that they're specified on the link line.  Thus, it is pointless
 332    to put anything in ENDFILE_SPEC.  */
 333 /* #define ENDFILE_SPEC "" */
 334
 335 /* Default Darwin ASM_SPEC, very simple.  */
 336 #define ASM_SPEC "-arch %(darwin_arch) \
 337   %{Zforce_cpusubtype_ALL:-force_cpusubtype_ALL}"
 338
 339 /* We use Dbx symbol format.  */
 340
 341 #define DBX_DEBUGGING_INFO 1
 342
 343 /* Also enable Dwarf 2 as an option.  */
 344 #define DWARF2_DEBUGGING_INFO
 345 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
 346
 347 #define DEBUG_FRAME_SECTION   "__DWARFA,__debug_frame,coalesced,no_toc+strip_static_syms"
 348 #define DEBUG_INFO_SECTION    "__DWARFA,__debug_info"
 349 #define DEBUG_ABBREV_SECTION  "__DWARFA,__debug_abbrev"
 350 #define DEBUG_ARANGES_SECTION "__DWARFA,__debug_aranges"
 351 #define DEBUG_MACINFO_SECTION "__DWARFA,__debug_macinfo"
 352 #define DEBUG_LINE_SECTION    "__DWARFA,__debug_line"
 353 #define DEBUG_LOC_SECTION     "__DWARFA,__debug_loc"
 354 #define DEBUG_PUBNAMES_SECTION        "__DWARFA,__debug_pubnames"
 355 #define DEBUG_STR_SECTION     "__DWARFA,__debug_str"
 356 #define DEBUG_RANGES_SECTION  "__DWARFA,__debug_ranges"
 357
 358 /* When generating stabs debugging, use N_BINCL entries.  */
 359
 360 #define DBX_USE_BINCL
 361
 362 /* There is no limit to the length of stabs strings.  */
 363
 364 #define DBX_CONTIN_LENGTH 0
 365
 366 /* gdb needs a null N_SO at the end of each file for scattered loading.  */
 367
 368 #define DBX_OUTPUT_NULL_N_SO_AT_MAIN_SOURCE_FILE_END
 369
 370 /* GCC's definition of 'one_only' is the same as its definition of 'weak'.  */
 371 #define MAKE_DECL_ONE_ONLY(DECL) (DECL_WEAK (DECL) = 1)
 372
 373 /* Mach-O supports 'weak imports', and 'weak definitions' in coalesced
 374    sections.  machopic_select_section ensures that weak variables go in
 375    coalesced sections.  Weak aliases (or any other kind of aliases) are
 376    not supported.  Weak symbols that aren't visible outside the .s file
 377    are not supported.  */
 378 #define ASM_WEAKEN_DECL(FILE, DECL, NAME, ALIAS)                        \
 379   do {                                                                  \
 380     if (ALIAS)                                                          \
 381       {                                                                 \
 382         warning (0, "alias definitions not supported in Mach-O; ignored");      \
 383         break;                                                          \
 384       }                                                                 \
 385                                                                         \
 386     if (! DECL_EXTERNAL (DECL) && TREE_PUBLIC (DECL))                   \
 387       targetm.asm_out.globalize_label (FILE, NAME);                     \
 388     if (DECL_EXTERNAL (DECL))                                           \
 389       fputs ("\t.weak_reference ", FILE);                               \
 390     else if (! lookup_attribute ("weak", DECL_ATTRIBUTES (DECL))        \
 391         && lookup_attribute ("weak_import", DECL_ATTRIBUTES (DECL)))    \
 392       break;                                                            \
 393     else if (TREE_PUBLIC (DECL))                                        \
 394       fputs ("\t.weak_definition ", FILE);                              \
 395     else                                                                \
 396       break;                                                            \
 397     assemble_name (FILE, NAME);                                         \
 398     fputc ('\n', FILE);                                                 \
 399   } while (0)
 400
 401 /* Darwin has the pthread routines in libSystem, which every program
 402    links to, so there's no need for weak-ness for that.  */
 403 #define GTHREAD_USE_WEAK 0
 404
 405 /* The Darwin linker imposes two limitations on common symbols: they
 406    can't have hidden visibility, and they can't appear in dylibs.  As
 407    a consequence, we should never use common symbols to represent
 408    vague linkage. */
 409 #undef USE_COMMON_FOR_ONE_ONLY
 410 #define USE_COMMON_FOR_ONE_ONLY 0
 411
 412 /* The Darwin linker doesn't want coalesced symbols to appear in
 413    a static archive's table of contents. */
 414 #undef TARGET_WEAK_NOT_IN_ARCHIVE_TOC
 415 #define TARGET_WEAK_NOT_IN_ARCHIVE_TOC 1
 416
 417 /* We make exception information linkonce. */
 418 #undef TARGET_USES_WEAK_UNWIND_INFO
 419 #define TARGET_USES_WEAK_UNWIND_INFO 1
 420
 421 /* We need to use a nonlocal label for the start of an EH frame: the
 422    Darwin linker requires that a coalesced section start with a label. */
 423 #undef FRAME_BEGIN_LABEL
 424 #define FRAME_BEGIN_LABEL "EH_frame"
 425
 426 /* Emit a label for the FDE corresponding to DECL.  EMPTY means
 427    emit a label for an empty FDE. */
 428 #define TARGET_ASM_EMIT_UNWIND_LABEL darwin_emit_unwind_label
 429
 430 /* Our profiling scheme doesn't LP labels and counter words.  */
 431
 432 #define NO_PROFILE_COUNTERS     1
 433
 434 #undef  INIT_SECTION_ASM_OP
 435 #define INIT_SECTION_ASM_OP
 436
 437 #undef  INVOKE__main
 438
 439 #define TARGET_ASM_CONSTRUCTOR  machopic_asm_out_constructor
 440 #define TARGET_ASM_DESTRUCTOR   machopic_asm_out_destructor
 441
 442 /* Always prefix with an underscore.  */
 443
 444 #define USER_LABEL_PREFIX "_"
 445
 446 /* Don't output a .file directive.  That is only used by the assembler for
 447    error reporting.  */
 448 #undef  TARGET_ASM_FILE_START_FILE_DIRECTIVE
 449 #define TARGET_ASM_FILE_START_FILE_DIRECTIVE false
 450
 451 #undef  TARGET_ASM_FILE_END
 452 #define TARGET_ASM_FILE_END darwin_file_end
 453
 454 #define ASM_OUTPUT_SKIP(FILE,SIZE)  \
 455   fprintf (FILE, "\t.space "HOST_WIDE_INT_PRINT_UNSIGNED"\n", SIZE)
 456
 457 /* Give ObjC methods pretty symbol names.  */
 458
 459 #undef  OBJC_GEN_METHOD_LABEL
 460 #define OBJC_GEN_METHOD_LABEL(BUF,IS_INST,CLASS_NAME,CAT_NAME,SEL_NAME,NUM) \
 461   do { if (CAT_NAME)                                                    \
 462          sprintf (BUF, "%c[%s(%s) %s]", (IS_INST) ? '-' : '+',          \
 463                   (CLASS_NAME), (CAT_NAME), (SEL_NAME));                \
 464        else                                                             \
 465          sprintf (BUF, "%c[%s %s]", (IS_INST) ? '-' : '+',              \
 466                   (CLASS_NAME), (SEL_NAME));                            \
 467      } while (0)
 468
 469 /* The RTTI data (e.g., __ti4name) is common and public (and static),
 470    but it does need to be referenced via indirect PIC data pointers.
 471    The machopic_define_symbol calls are telling the machopic subsystem
 472    that the name *is* defined in this module, so it doesn't need to
 473    make them indirect.  */
 474
 475 #undef ASM_DECLARE_OBJECT_NAME
 476 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL)                       \
 477   do {                                                                  \
 478     const char *xname = NAME;                                           \
 479     if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF)             \
 480       xname = IDENTIFIER_POINTER (DECL_NAME (DECL));                    \
 481     if (! DECL_WEAK (DECL)                                              \
 482         && ((TREE_STATIC (DECL)                                         \
 483              && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))           \
 484             || DECL_INITIAL (DECL)))                                    \
 485         machopic_define_symbol (DECL_RTL (DECL));                       \
 486     if ((TREE_STATIC (DECL)                                             \
 487          && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))               \
 488         || DECL_INITIAL (DECL))                                         \
 489       (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false);   \
 490     ASM_OUTPUT_LABEL (FILE, xname);                                     \
 491     /* Darwin doesn't support zero-size objects, so give them a         \
 492        byte.  */                                                        \
 493     if (tree_low_cst (DECL_SIZE_UNIT (DECL), 1) == 0)                   \
 494       assemble_zeros (1);                                               \
 495   } while (0)
 496
 497 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL)                     \
 498   do {                                                                  \
 499     const char *xname = NAME;                                           \
 500     if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF)             \
 501       xname = IDENTIFIER_POINTER (DECL_NAME (DECL));                    \
 502     if (! DECL_WEAK (DECL)                                              \
 503         && ((TREE_STATIC (DECL)                                         \
 504              && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))           \
 505             || DECL_INITIAL (DECL)))                                    \
 506         machopic_define_symbol (DECL_RTL (DECL));                       \
 507     if ((TREE_STATIC (DECL)                                             \
 508          && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))               \
 509         || DECL_INITIAL (DECL))                                         \
 510       (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false);   \
 511     ASM_OUTPUT_LABEL (FILE, xname);                                     \
 512   } while (0)
 513
 514 #define ASM_DECLARE_CONSTANT_NAME(FILE, NAME, EXP, SIZE)        \
 515   do {                                                          \
 516     ASM_OUTPUT_LABEL (FILE, NAME);                              \
 517     /* Darwin doesn't support zero-size objects, so give them a \
 518        byte.  */                                                \
 519     if ((SIZE) == 0)                                            \
 520       assemble_zeros (1);                                       \
 521   } while (0)
 522
 523 /* Wrap new method names in quotes so the assembler doesn't gag.
 524    Make Objective-C internal symbols local.  */
 525
 526 #undef  ASM_OUTPUT_LABELREF
 527 #define ASM_OUTPUT_LABELREF(FILE,NAME)                                       \
 528   do {                                                                       \
 529        const char *xname = (NAME);                                           \
 530        if (! strcmp (xname, "<pic base>"))                                   \
 531          machopic_output_function_base_name(FILE);                           \
 532        else if (xname[0] == '&' || xname[0] == '*')                          \
 533          {                                                                   \
 534            int len = strlen (xname);                                         \
 535            if (len > 6 && !strcmp ("$stub", xname + len - 5))                \
 536              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 537            else if (len > 7 && !strcmp ("$stub\"", xname + len - 6))         \
 538              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 539            else if (len > 14 && !strcmp ("$non_lazy_ptr", xname + len - 13)) \
 540              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 541            else if (len > 15 && !strcmp ("$non_lazy_ptr\"", xname + len - 14)) \
 542              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 543            if (xname[1] != '"' && name_needs_quotes (&xname[1]))             \
 544              fprintf (FILE, "\"%s\"", &xname[1]);                            \
 545            else                                                              \
 546              fputs (&xname[1], FILE);                                        \
 547          }                                                                   \
 548        else if (xname[0] == '+' || xname[0] == '-')                          \
 549          fprintf (FILE, "\"%s\"", xname);                                    \
 550        else if (!strncmp (xname, "_OBJC_", 6))                               \
 551          fprintf (FILE, "L%s", xname);                                       \
 552        else if (!strncmp (xname, ".objc_class_name_", 17))                   \
 553          fprintf (FILE, "%s", xname);                                        \
 554        else if (xname[0] != '"' && name_needs_quotes (xname))                \
 555          fprintf (FILE, "\"%s\"", xname);                                    \
 556        else                                                                  \
 557          asm_fprintf (FILE, "%U%s", xname);                                  \
 558   } while (0)
 559
 560 /* Output before executable code.  */
 561 #undef TEXT_SECTION_ASM_OP
 562 #define TEXT_SECTION_ASM_OP "\t.text"
 563
 564 /* Output before writable data.  */
 565
 566 #undef DATA_SECTION_ASM_OP
 567 #define DATA_SECTION_ASM_OP "\t.data"
 568
 569 #undef  ALIGN_ASM_OP
 570 #define ALIGN_ASM_OP            ".align"
 571
 572 #undef  ASM_OUTPUT_ALIGN
 573 #define ASM_OUTPUT_ALIGN(FILE,LOG)      \
 574   if ((LOG) != 0)                       \
 575     fprintf (FILE, "\t%s %d\n", ALIGN_ASM_OP, (LOG))
 576
 577 /* Ensure correct alignment of bss data.  */
 578
 579 #undef  ASM_OUTPUT_ALIGNED_DECL_LOCAL
 580 #define ASM_OUTPUT_ALIGNED_DECL_LOCAL(FILE, DECL, NAME, SIZE, ALIGN)    \
 581   do {                                                                  \
 582     unsigned HOST_WIDE_INT _new_size = SIZE;                            \
 583     fputs (".lcomm ", (FILE));                                          \
 584     assemble_name ((FILE), (NAME));                                     \
 585     if (_new_size == 0) _new_size = 1;                                  \
 586     fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED",%u\n", _new_size, \
 587              floor_log2 ((ALIGN) / BITS_PER_UNIT));                     \
 588     if ((DECL) && ((TREE_STATIC (DECL)                                  \
 589          && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))               \
 590         || DECL_INITIAL (DECL)))                                        \
 591       {                                                                 \
 592         (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false); \
 593         machopic_define_symbol (DECL_RTL (DECL));                       \
 594       }                                                                 \
 595   } while (0)
 596
 597 /* The maximum alignment which the object file format can support.
 598    For Mach-O, this is 2^15.  */
 599
 600 #undef  MAX_OFILE_ALIGNMENT
 601 #define MAX_OFILE_ALIGNMENT 0x8000
 602
 603 /* Create new Mach-O sections.  */
 604
 605 #undef  SECTION_FUNCTION
 606 #define SECTION_FUNCTION(FUNCTION, SECTION, DIRECTIVE, OBJC)            \
 607 extern void FUNCTION (void);                                            \
 608 void                                                                    \
 609 FUNCTION (void)                                                         \
 610 {                                                                       \
 611   if (in_section != SECTION)                                            \
 612     {                                                                   \
 613       if (OBJC)                                                         \
 614         objc_section_init ();                                           \
 615       if (asm_out_file)                                                 \
 616         fputs ("\t" DIRECTIVE "\n", asm_out_file);                      \
 617       in_section = SECTION;                                             \
 618       if ((SECTION == in_text_coal)                                     \
 619           || (SECTION == in_text_unlikely)                              \
 620           || (SECTION == in_text_unlikely_coal))                        \
 621         last_text_section = SECTION;                                    \
 622     }                                                                   \
 623 }                                                                       \
 624
 625 /* Darwin uses many types of special sections.  */
 626
 627 #undef  EXTRA_SECTIONS
 628 #define EXTRA_SECTIONS                                                  \
 629   in_text_coal, in_text_unlikely, in_text_unlikely_coal,                \
 630   in_const, in_const_data, in_cstring, in_literal4, in_literal8,        \
 631   in_const_coal, in_const_data_coal, in_data_coal,                      \
 632   in_constructor, in_destructor, in_mod_init, in_mod_term,              \
 633   in_objc_class, in_objc_meta_class, in_objc_category,                  \
 634   in_objc_class_vars, in_objc_instance_vars,                            \
 635   in_objc_cls_meth, in_objc_inst_meth,                                  \
 636   in_objc_cat_cls_meth, in_objc_cat_inst_meth,                          \
 637   in_objc_selector_refs,                                                \
 638   in_objc_selector_fixup,                                               \
 639   in_objc_symbols, in_objc_module_info,                                 \
 640   in_objc_protocol, in_objc_string_object,                              \
 641   in_objc_constant_string_object,                                       \
 642   in_objc_image_info,                                                   \
 643   in_objc_class_names, in_objc_meth_var_names,                          \
 644   in_objc_meth_var_types, in_objc_cls_refs,                             \
 645   in_machopic_nl_symbol_ptr,                                            \
 646   in_machopic_lazy_symbol_ptr,                                          \
 647   in_machopic_symbol_stub,                                              \
 648   in_machopic_symbol_stub1,                                             \
 649   in_machopic_picsymbol_stub,                                           \
 650   in_machopic_picsymbol_stub1,                                          \
 651   in_darwin_exception, in_darwin_eh_frame,                              \
 652   num_sections
 653
 654 #undef  EXTRA_SECTION_FUNCTIONS
 655 #define EXTRA_SECTION_FUNCTIONS                                 \
 656 static void objc_section_init (void);                           \
 657 SECTION_FUNCTION (text_coal_section,                            \
 658                   in_text_coal,                                 \
 659                   ".section __TEXT,__textcoal_nt,coalesced,"    \
 660                     "pure_instructions", 0)                     \
 661 SECTION_FUNCTION (text_unlikely_coal_section,                   \
 662                   in_text_unlikely_coal,                        \
 663                   ".section __TEXT,__text_unlikely_coal,"       \
 664                     "coalesced,pure_instructions", 0)           \
 665 SECTION_FUNCTION (const_section,                                \
 666                   in_const,                                     \
 667                   ".const", 0)                                  \
 668 SECTION_FUNCTION (const_coal_section,                           \
 669                   in_const_coal,                                \
 670                   ".section __TEXT,__const_coal,coalesced", 0)  \
 671 SECTION_FUNCTION (const_data_section,                           \
 672                   in_const_data,                                \
 673                   ".const_data", 0)                             \
 674 SECTION_FUNCTION (const_data_coal_section,                      \
 675                   in_const_data_coal,                           \
 676                   ".section __DATA,__const_coal,coalesced", 0)  \
 677 SECTION_FUNCTION (data_coal_section,                            \
 678                   in_data_coal,                                 \
 679                   ".section __DATA,__datacoal_nt,coalesced", 0) \
 680 SECTION_FUNCTION (cstring_section,                              \
 681                   in_cstring,                                   \
 682                   ".cstring", 0)                                \
 683 SECTION_FUNCTION (literal4_section,                             \
 684                   in_literal4,                                  \
 685                   ".literal4", 0)                               \
 686 SECTION_FUNCTION (literal8_section,                             \
 687                   in_literal8,                                  \
 688                   ".literal8", 0)                               \
 689 SECTION_FUNCTION (constructor_section,                          \
 690                   in_constructor,                               \
 691                   ".constructor", 0)                            \
 692 SECTION_FUNCTION (mod_init_section,                             \
 693                   in_mod_init,                                  \
 694                   ".mod_init_func", 0)                          \
 695 SECTION_FUNCTION (mod_term_section,                             \
 696                   in_mod_term,                                  \
 697                   ".mod_term_func", 0)                          \
 698 SECTION_FUNCTION (destructor_section,                           \
 699                   in_destructor,                                \
 700                   ".destructor", 0)                             \
 701 SECTION_FUNCTION (objc_class_section,                           \
 702                   in_objc_class,                                \
 703                   ".objc_class", 1)                             \
 704 SECTION_FUNCTION (objc_meta_class_section,                      \
 705                   in_objc_meta_class,                           \
 706                   ".objc_meta_class", 1)                        \
 707 SECTION_FUNCTION (objc_category_section,                        \
 708                   in_objc_category,                             \
 709                 ".objc_category", 1)                            \
 710 SECTION_FUNCTION (objc_class_vars_section,                      \
 711                   in_objc_class_vars,                           \
 712                   ".objc_class_vars", 1)                        \
 713 SECTION_FUNCTION (objc_instance_vars_section,                   \
 714                   in_objc_instance_vars,                        \
 715                   ".objc_instance_vars", 1)                     \
 716 SECTION_FUNCTION (objc_cls_meth_section,                        \
 717                   in_objc_cls_meth,                             \
 718                   ".objc_cls_meth", 1)                          \
 719 SECTION_FUNCTION (objc_inst_meth_section,                       \
 720                   in_objc_inst_meth,                            \
 721                   ".objc_inst_meth", 1)                         \
 722 SECTION_FUNCTION (objc_cat_cls_meth_section,                    \
 723                   in_objc_cat_cls_meth,                         \
 724                   ".objc_cat_cls_meth", 1)                      \
 725 SECTION_FUNCTION (objc_cat_inst_meth_section,                   \
 726                   in_objc_cat_inst_meth,                        \
 727                   ".objc_cat_inst_meth", 1)                     \
 728 SECTION_FUNCTION (objc_selector_refs_section,                   \
 729                   in_objc_selector_refs,                        \
 730                   ".objc_message_refs", 1)                      \
 731 SECTION_FUNCTION (objc_selector_fixup_section,                               \
 732                   in_objc_selector_fixup,                                    \
 733                   ".section __OBJC, __sel_fixup, regular, no_dead_strip", 1) \
 734 SECTION_FUNCTION (objc_symbols_section,                                 \
 735                   in_objc_symbols,                                      \
 736                   ".objc_symbols", 1)                                   \
 737 SECTION_FUNCTION (objc_module_info_section,                             \
 738                   in_objc_module_info,                                  \
 739                   ".objc_module_info", 1)                               \
 740 SECTION_FUNCTION (objc_protocol_section,                                \
 741                   in_objc_protocol,                                     \
 742                   ".objc_protocol", 1)                                  \
 743 SECTION_FUNCTION (objc_string_object_section,                           \
 744                   in_objc_string_object,                                \
 745                   ".objc_string_object", 1)                             \
 746 SECTION_FUNCTION (objc_constant_string_object_section,                  \
 747                   in_objc_constant_string_object,                       \
 748                   ".section __OBJC, __cstring_object, regular, "        \
 749                     "no_dead_strip", 1)                                 \
 750 /* Fix-and-Continue image marker.  */                                   \
 751 SECTION_FUNCTION (objc_image_info_section,                              \
 752                   in_objc_image_info,                                   \
 753                   ".section __OBJC, __image_info, regular, "            \
 754                     "no_dead_strip", 1)                                 \
 755 SECTION_FUNCTION (objc_class_names_section,                             \
 756                 in_objc_class_names,                                    \
 757                 ".objc_class_names", 1)                                 \
 758 SECTION_FUNCTION (objc_meth_var_names_section,                          \
 759                 in_objc_meth_var_names,                                 \
 760                 ".objc_meth_var_names", 1)                              \
 761 SECTION_FUNCTION (objc_meth_var_types_section,                          \
 762                 in_objc_meth_var_types,                                 \
 763                 ".objc_meth_var_types", 1)                              \
 764 SECTION_FUNCTION (objc_cls_refs_section,                                \
 765                 in_objc_cls_refs,                                       \
 766                 ".objc_cls_refs", 1)                                    \
 767 \
 768 SECTION_FUNCTION (machopic_lazy_symbol_ptr_section,                     \
 769                 in_machopic_lazy_symbol_ptr,                            \
 770                 ".lazy_symbol_pointer", 0)                              \
 771 SECTION_FUNCTION (machopic_nl_symbol_ptr_section,                       \
 772                 in_machopic_nl_symbol_ptr,                              \
 773                 ".non_lazy_symbol_pointer", 0)                          \
 774 SECTION_FUNCTION (machopic_symbol_stub_section,                         \
 775                 in_machopic_symbol_stub,                                \
 776                 ".symbol_stub", 0)                                      \
 777 SECTION_FUNCTION (machopic_symbol_stub1_section,                        \
 778                 in_machopic_symbol_stub1,                               \
 779                 ".section __TEXT,__symbol_stub1,symbol_stubs,"          \
 780                   "pure_instructions,16", 0)                            \
 781 SECTION_FUNCTION (machopic_picsymbol_stub_section,                      \
 782                 in_machopic_picsymbol_stub,                             \
 783                 ".picsymbol_stub", 0)                                   \
 784 SECTION_FUNCTION (machopic_picsymbol_stub1_section,                     \
 785                 in_machopic_picsymbol_stub1,                            \
 786                 ".section __TEXT,__picsymbolstub1,symbol_stubs,"        \
 787                   "pure_instructions,32", 0)                            \
 788 SECTION_FUNCTION (darwin_exception_section,                             \
 789                 in_darwin_exception,                                    \
 790                 ".section __DATA,__gcc_except_tab", 0)                  \
 791 SECTION_FUNCTION (darwin_eh_frame_section,                              \
 792                 in_darwin_eh_frame,                                     \
 793                 ".section " EH_FRAME_SECTION_NAME ",__eh_frame"         \
 794                   EH_FRAME_SECTION_ATTR, 0)                             \
 795 \
 796 static void                                     \
 797 objc_section_init (void)                        \
 798 {                                               \
 799   static int been_here = 0;                     \
 800                                                 \
 801   if (been_here == 0)                           \
 802     {                                           \
 803       been_here = 1;                            \
 804           /* written, cold -> hot */            \
 805       objc_cat_cls_meth_section ();             \
 806       objc_cat_inst_meth_section ();            \
 807       objc_string_object_section ();            \
 808       objc_constant_string_object_section ();   \
 809       objc_selector_refs_section ();            \
 810       objc_selector_fixup_section ();           \
 811       objc_cls_refs_section ();                 \
 812       objc_class_section ();                    \
 813       objc_meta_class_section ();               \
 814           /* shared, hot -> cold */             \
 815       objc_cls_meth_section ();                 \
 816       objc_inst_meth_section ();                \
 817       objc_protocol_section ();                 \
 818       objc_class_names_section ();              \
 819       objc_meth_var_types_section ();           \
 820       objc_meth_var_names_section ();           \
 821       objc_category_section ();                 \
 822       objc_class_vars_section ();               \
 823       objc_instance_vars_section ();            \
 824       objc_module_info_section ();              \
 825       objc_symbols_section ();                  \
 826     }                                           \
 827 }
 828
 829 #define READONLY_DATA_SECTION const_section
 830
 831 #undef  TARGET_ASM_SELECT_SECTION
 832 #define TARGET_ASM_SELECT_SECTION machopic_select_section
 833 #define USE_SELECT_SECTION_FOR_FUNCTIONS
 834
 835 #undef  TARGET_ASM_SELECT_RTX_SECTION
 836 #define TARGET_ASM_SELECT_RTX_SECTION machopic_select_rtx_section
 837 #undef  TARGET_ASM_UNIQUE_SECTION
 838 #define TARGET_ASM_UNIQUE_SECTION darwin_unique_section
 839 #undef  TARGET_ASM_FUNCTION_RODATA_SECTION
 840 #define TARGET_ASM_FUNCTION_RODATA_SECTION default_no_function_rodata_section
 841
 842
 843 #define ASM_DECLARE_UNRESOLVED_REFERENCE(FILE,NAME)                     \
 844     do {                                                                \
 845          if (FILE) {                                                    \
 846            if (MACHOPIC_INDIRECT)                                       \
 847              fprintf (FILE, "\t.lazy_reference ");                      \
 848            else                                                         \
 849              fprintf (FILE, "\t.reference ");                           \
 850            assemble_name (FILE, NAME);                                  \
 851            fprintf (FILE, "\n");                                        \
 852          }                                                              \
 853        } while (0)
 854
 855 #define ASM_DECLARE_CLASS_REFERENCE(FILE,NAME)                          \
 856     do {                                                                \
 857          if (FILE) {                                                    \
 858            fprintf (FILE, "\t");                                        \
 859            assemble_name (FILE, NAME);                                  \
 860            fprintf (FILE, "=0\n");                                      \
 861            (*targetm.asm_out.globalize_label) (FILE, NAME);             \
 862          }                                                              \
 863        } while (0)
 864
 865 /* Globalizing directive for a label.  */
 866 #define GLOBAL_ASM_OP ".globl "
 867 #define TARGET_ASM_GLOBALIZE_LABEL darwin_globalize_label
 868
 869 /* Emit an assembler directive to set visibility for a symbol.  Used
 870    to support visibility attribute and Darwin's private extern
 871    feature.  */
 872 #undef TARGET_ASM_ASSEMBLE_VISIBILITY
 873 #define TARGET_ASM_ASSEMBLE_VISIBILITY darwin_assemble_visibility
 874
 875 /* Extra attributes for Darwin.  */
 876 #define SUBTARGET_ATTRIBUTE_TABLE                                            \
 877   /* { name, min_len, max_len, decl_req, type_req, fn_type_req, handler } */ \
 878   { "weak_import", 0, 0, true, false, false,                                 \
 879     darwin_handle_weak_import_attribute }
 880
 881 #undef ASM_GENERATE_INTERNAL_LABEL
 882 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM)   \
 883   sprintf (LABEL, "*%s%ld", PREFIX, (long)(NUM))
 884
 885 #undef TARGET_ASM_MARK_DECL_PRESERVED
 886 #define TARGET_ASM_MARK_DECL_PRESERVED darwin_mark_decl_preserved
 887
 888 /* Set on a symbol with SYMBOL_FLAG_FUNCTION or
 889    MACHO_SYMBOL_FLAG_VARIABLE to indicate that the function or
 890    variable has been defined in this translation unit.  */
 891
 892 #define MACHO_SYMBOL_FLAG_VARIABLE (SYMBOL_FLAG_MACH_DEP)
 893 #define MACHO_SYMBOL_FLAG_DEFINED ((SYMBOL_FLAG_MACH_DEP) << 1)
 894
 895 /* Set on a symbol to indicate when fix-and-continue style code
 896    generation is being used and the symbol refers to a static symbol
 897    that should be rebound from new instances of a translation unit to
 898    the original instance of the data.  */
 899
 900 #define MACHO_SYMBOL_STATIC ((SYMBOL_FLAG_MACH_DEP) << 2)
 901
 902 /* Symbolic names for various things we might know about a symbol.  */
 903
 904 enum machopic_addr_class {
 905   MACHOPIC_UNDEFINED,
 906   MACHOPIC_DEFINED_DATA,
 907   MACHOPIC_UNDEFINED_DATA,
 908   MACHOPIC_DEFINED_FUNCTION,
 909   MACHOPIC_UNDEFINED_FUNCTION
 910 };
 911
 912 /* Macros defining the various PIC cases.  */
 913
 914 #define MACHO_DYNAMIC_NO_PIC_P  (TARGET_DYNAMIC_NO_PIC)
 915 #define MACHOPIC_INDIRECT       (flag_pic || MACHO_DYNAMIC_NO_PIC_P)
 916 #define MACHOPIC_JUST_INDIRECT  (flag_pic == 1 || MACHO_DYNAMIC_NO_PIC_P)
 917 #define MACHOPIC_PURE           (flag_pic == 2 && ! MACHO_DYNAMIC_NO_PIC_P)
 918
 919 #undef TARGET_ENCODE_SECTION_INFO
 920 #define TARGET_ENCODE_SECTION_INFO  darwin_encode_section_info
 921 #undef TARGET_STRIP_NAME_ENCODING
 922 #define TARGET_STRIP_NAME_ENCODING  default_strip_name_encoding
 923
 924 #define GEN_BINDER_NAME_FOR_STUB(BUF,STUB,STUB_LENGTH)          \
 925   do {                                                          \
 926     const char *const stub_ = (STUB);                           \
 927     char *buffer_ = (BUF);                                      \
 928     strcpy (buffer_, stub_);                                    \
 929     if (stub_[0] == '"')                                        \
 930       {                                                         \
 931         strcpy (buffer_ + (STUB_LENGTH) - 1, "_binder\"");      \
 932       }                                                         \
 933     else                                                        \
 934       {                                                         \
 935         strcpy (buffer_ + (STUB_LENGTH), "_binder");            \
 936       }                                                         \
 937   } while (0)
 938
 939 #define GEN_SYMBOL_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH)    \
 940   do {                                                          \
 941     const char *const symbol_ = (SYMBOL);                       \
 942     char *buffer_ = (BUF);                                      \
 943     if (name_needs_quotes (symbol_) && symbol_[0] != '"')       \
 944       {                                                         \
 945           sprintf (buffer_, "\"%s\"", symbol_);                 \
 946       }                                                         \
 947     else                                                        \
 948       {                                                         \
 949         strcpy (buffer_, symbol_);                              \
 950       }                                                         \
 951   } while (0)
 952
 953 /* Given a symbol name string, create the lazy pointer version
 954    of the symbol name.  */
 955
 956 #define GEN_LAZY_PTR_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH)  \
 957   do {                                                          \
 958     const char *symbol_ = (SYMBOL);                             \
 959     char *buffer_ = (BUF);                                      \
 960     if (symbol_[0] == '"')                                      \
 961       {                                                         \
 962         strcpy (buffer_, "\"L");                                \
 963         strcpy (buffer_ + 2, symbol_ + 1);                      \
 964         strcpy (buffer_ + (SYMBOL_LENGTH), "$lazy_ptr\"");      \
 965       }                                                         \
 966     else if (name_needs_quotes (symbol_))                       \
 967       {                                                         \
 968         strcpy (buffer_, "\"L");                                \
 969         strcpy (buffer_ + 2, symbol_);                          \
 970         strcpy (buffer_ + (SYMBOL_LENGTH) + 2, "$lazy_ptr\"");  \
 971       }                                                         \
 972     else                                                        \
 973       {                                                         \
 974         strcpy (buffer_, "L");                                  \
 975         strcpy (buffer_ + 1, symbol_);                          \
 976         strcpy (buffer_ + (SYMBOL_LENGTH) + 1, "$lazy_ptr");    \
 977       }                                                         \
 978   } while (0)
 979
 980 #define TARGET_ASM_EXCEPTION_SECTION darwin_exception_section
 981
 982 #define TARGET_ASM_EH_FRAME_SECTION darwin_eh_frame_section
 983
 984 #define EH_FRAME_SECTION_NAME   "__TEXT"
 985 #define EH_FRAME_SECTION_ATTR ",coalesced,no_toc+strip_static_syms+live_support"
 986
 987 /* Java runtime class list.  */
 988 #define JCR_SECTION_NAME "__DATA,jcr,regular,no_dead_strip"
 989
 990 #undef ASM_PREFERRED_EH_DATA_FORMAT
 991 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL)  \
 992   (((CODE) == 2 && (GLOBAL) == 1) \
 993    ? (DW_EH_PE_pcrel | DW_EH_PE_indirect | DW_EH_PE_sdata4) : \
 994      ((CODE) == 1 || (GLOBAL) == 0) ? DW_EH_PE_pcrel : DW_EH_PE_absptr)
 995
 996 #define ASM_OUTPUT_DWARF_DELTA(FILE,SIZE,LABEL1,LABEL2)  \
 997   darwin_asm_output_dwarf_delta (FILE, SIZE, LABEL1, LABEL2)
 998
 999 #define ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX(ASM_OUT_FILE, ENCODING, SIZE, ADDR, DONE)     \
1000       if (ENCODING == ASM_PREFERRED_EH_DATA_FORMAT (2, 1)) {                            \
1001         darwin_non_lazy_pcrel (ASM_OUT_FILE, ADDR);                                     \
1002         goto DONE;                                                                      \
1003       }
1004
1005 /* Experimentally, putting jump tables in text is faster on SPEC.
1006    Also this is needed for correctness for coalesced functions.  */
1007
1008 #ifndef JUMP_TABLES_IN_TEXT_SECTION
1009 #define JUMP_TABLES_IN_TEXT_SECTION 1
1010 #endif
1011
1012 #define TARGET_TERMINATE_DW2_EH_FRAME_INFO false
1013
1014 #undef TARGET_ASM_NAMED_SECTION
1015 #define TARGET_ASM_NAMED_SECTION darwin_asm_named_section
1016
1017 #define DARWIN_REGISTER_TARGET_PRAGMAS()                        \
1018   do {                                                          \
1019     c_register_pragma (0, "mark", darwin_pragma_ignore);        \
1020     c_register_pragma (0, "options", darwin_pragma_options);    \
1021     c_register_pragma (0, "segment", darwin_pragma_ignore);     \
1022     c_register_pragma (0, "unused", darwin_pragma_unused);      \
1023   } while (0)
1024
1025 #undef ASM_APP_ON
1026 #define ASM_APP_ON ""
1027 #undef ASM_APP_OFF
1028 #define ASM_APP_OFF ""
1029
1030 void darwin_register_frameworks (const char *, const char *, int);
1031 void darwin_register_objc_includes (const char *, const char *, int);
1032 #define TARGET_EXTRA_PRE_INCLUDES darwin_register_objc_includes
1033 #define TARGET_EXTRA_INCLUDES darwin_register_frameworks
1034
1035 void add_framework_path (char *);
1036 #define TARGET_OPTF add_framework_path
1037
1038 #define TARGET_POSIX_IO
1039
1040 /* All new versions of Darwin have C99 functions.  */
1041 #define TARGET_C99_FUNCTIONS 1
1042
1043 #define WINT_TYPE "int"
1044
1045 #endif /* CONFIG_DARWIN_H */