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 /* Support -mmacosx-version-min by supplying different (stub) libgcc_s.dylib
 306    libraries to link against, and by not linking against libgcc_s on
 307    earlier-than-10.3.9.
 308
 309    Note that by default, -lgcc_eh is not linked against!  This is
 310    because in a future version of Darwin the EH frame information may
 311    be in a new format, or the fallback routine might be changed; if
 312    you want to explicitly link against the static version of those
 313    routines, because you know you don't need to unwind through system
 314    libraries, you need to explicitly say -static-libgcc.
 315
 316    If it is linked against, it has to be before -lgcc, because it may
 317    need symbols from -lgcc.  */
 318 #undef REAL_LIBGCC_SPEC
 319 #define REAL_LIBGCC_SPEC                                                   \
 320    "%{static-libgcc|static: -lgcc_eh -lgcc;                                \
 321       shared-libgcc|fexceptions:                                           \
 322        %:version-compare(!> 10.5 mmacosx-version-min= -lgcc_s.10.4)        \
 323        %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_s.10.5)        \
 324        -lgcc;                                                              \
 325       :%:version-compare(>< 10.3.9 10.5 mmacosx-version-min= -lgcc_s.10.4) \
 326        %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_s.10.5)        \
 327        -lgcc}"
 328
 329 /* We specify crt0.o as -lcrt0.o so that ld will search the library path.  */
 330
 331 #undef  STARTFILE_SPEC
 332 #define STARTFILE_SPEC  \
 333   "%{!Zdynamiclib:%{Zbundle:%{!static:-lbundle1.o}} \
 334      %{!Zbundle:%{pg:%{static:-lgcrt0.o} \
 335                      %{!static:%{object:-lgcrt0.o} \
 336                                %{!object:%{preload:-lgcrt0.o} \
 337                                  %{!preload:-lgcrt1.o %(darwin_crt2)}}}} \
 338                 %{!pg:%{static:-lcrt0.o} \
 339                       %{!static:%{object:-lcrt0.o} \
 340                                 %{!object:%{preload:-lcrt0.o} \
 341                                   %{!preload:-lcrt1.o %(darwin_crt2)}}}}}}"
 342
 343 /* The native Darwin linker doesn't necessarily place files in the order
 344    that they're specified on the link line.  Thus, it is pointless
 345    to put anything in ENDFILE_SPEC.  */
 346 /* #define ENDFILE_SPEC "" */
 347
 348 /* Default Darwin ASM_SPEC, very simple.  */
 349 #define ASM_SPEC "-arch %(darwin_arch) \
 350   %{Zforce_cpusubtype_ALL:-force_cpusubtype_ALL}"
 351
 352 /* We use Dbx symbol format.  */
 353
 354 #define DBX_DEBUGGING_INFO 1
 355
 356 /* Also enable Dwarf 2 as an option.  */
 357 #define DWARF2_DEBUGGING_INFO
 358 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
 359
 360 #define DEBUG_FRAME_SECTION   "__DWARFA,__debug_frame,coalesced,no_toc+strip_static_syms"
 361 #define DEBUG_INFO_SECTION    "__DWARFA,__debug_info"
 362 #define DEBUG_ABBREV_SECTION  "__DWARFA,__debug_abbrev"
 363 #define DEBUG_ARANGES_SECTION "__DWARFA,__debug_aranges"
 364 #define DEBUG_MACINFO_SECTION "__DWARFA,__debug_macinfo"
 365 #define DEBUG_LINE_SECTION    "__DWARFA,__debug_line"
 366 #define DEBUG_LOC_SECTION     "__DWARFA,__debug_loc"
 367 #define DEBUG_PUBNAMES_SECTION        "__DWARFA,__debug_pubnames"
 368 #define DEBUG_STR_SECTION     "__DWARFA,__debug_str"
 369 #define DEBUG_RANGES_SECTION  "__DWARFA,__debug_ranges"
 370
 371 /* When generating stabs debugging, use N_BINCL entries.  */
 372
 373 #define DBX_USE_BINCL
 374
 375 /* There is no limit to the length of stabs strings.  */
 376
 377 #define DBX_CONTIN_LENGTH 0
 378
 379 /* gdb needs a null N_SO at the end of each file for scattered loading.  */
 380
 381 #define DBX_OUTPUT_NULL_N_SO_AT_MAIN_SOURCE_FILE_END
 382
 383 /* GCC's definition of 'one_only' is the same as its definition of 'weak'.  */
 384 #define MAKE_DECL_ONE_ONLY(DECL) (DECL_WEAK (DECL) = 1)
 385
 386 /* Mach-O supports 'weak imports', and 'weak definitions' in coalesced
 387    sections.  machopic_select_section ensures that weak variables go in
 388    coalesced sections.  Weak aliases (or any other kind of aliases) are
 389    not supported.  Weak symbols that aren't visible outside the .s file
 390    are not supported.  */
 391 #define ASM_WEAKEN_DECL(FILE, DECL, NAME, ALIAS)                        \
 392   do {                                                                  \
 393     if (ALIAS)                                                          \
 394       {                                                                 \
 395         warning (0, "alias definitions not supported in Mach-O; ignored");      \
 396         break;                                                          \
 397       }                                                                 \
 398                                                                         \
 399     if (! DECL_EXTERNAL (DECL) && TREE_PUBLIC (DECL))                   \
 400       targetm.asm_out.globalize_label (FILE, NAME);                     \
 401     if (DECL_EXTERNAL (DECL))                                           \
 402       fputs ("\t.weak_reference ", FILE);                               \
 403     else if (! lookup_attribute ("weak", DECL_ATTRIBUTES (DECL))        \
 404         && lookup_attribute ("weak_import", DECL_ATTRIBUTES (DECL)))    \
 405       break;                                                            \
 406     else if (TREE_PUBLIC (DECL))                                        \
 407       fputs ("\t.weak_definition ", FILE);                              \
 408     else                                                                \
 409       break;                                                            \
 410     assemble_name (FILE, NAME);                                         \
 411     fputc ('\n', FILE);                                                 \
 412   } while (0)
 413
 414 /* Darwin has the pthread routines in libSystem, which every program
 415    links to, so there's no need for weak-ness for that.  */
 416 #define GTHREAD_USE_WEAK 0
 417
 418 /* The Darwin linker imposes two limitations on common symbols: they
 419    can't have hidden visibility, and they can't appear in dylibs.  As
 420    a consequence, we should never use common symbols to represent
 421    vague linkage. */
 422 #undef USE_COMMON_FOR_ONE_ONLY
 423 #define USE_COMMON_FOR_ONE_ONLY 0
 424
 425 /* The Darwin linker doesn't want coalesced symbols to appear in
 426    a static archive's table of contents. */
 427 #undef TARGET_WEAK_NOT_IN_ARCHIVE_TOC
 428 #define TARGET_WEAK_NOT_IN_ARCHIVE_TOC 1
 429
 430 /* We make exception information linkonce. */
 431 #undef TARGET_USES_WEAK_UNWIND_INFO
 432 #define TARGET_USES_WEAK_UNWIND_INFO 1
 433
 434 /* We need to use a nonlocal label for the start of an EH frame: the
 435    Darwin linker requires that a coalesced section start with a label. */
 436 #undef FRAME_BEGIN_LABEL
 437 #define FRAME_BEGIN_LABEL "EH_frame"
 438
 439 /* Emit a label for the FDE corresponding to DECL.  EMPTY means
 440    emit a label for an empty FDE. */
 441 #define TARGET_ASM_EMIT_UNWIND_LABEL darwin_emit_unwind_label
 442
 443 /* Our profiling scheme doesn't LP labels and counter words.  */
 444
 445 #define NO_PROFILE_COUNTERS     1
 446
 447 #undef  INIT_SECTION_ASM_OP
 448 #define INIT_SECTION_ASM_OP
 449
 450 #undef  INVOKE__main
 451
 452 #define TARGET_ASM_CONSTRUCTOR  machopic_asm_out_constructor
 453 #define TARGET_ASM_DESTRUCTOR   machopic_asm_out_destructor
 454
 455 /* Always prefix with an underscore.  */
 456
 457 #define USER_LABEL_PREFIX "_"
 458
 459 /* Don't output a .file directive.  That is only used by the assembler for
 460    error reporting.  */
 461 #undef  TARGET_ASM_FILE_START_FILE_DIRECTIVE
 462 #define TARGET_ASM_FILE_START_FILE_DIRECTIVE false
 463
 464 #undef  TARGET_ASM_FILE_END
 465 #define TARGET_ASM_FILE_END darwin_file_end
 466
 467 #define ASM_OUTPUT_SKIP(FILE,SIZE)  \
 468   fprintf (FILE, "\t.space "HOST_WIDE_INT_PRINT_UNSIGNED"\n", SIZE)
 469
 470 /* Give ObjC methods pretty symbol names.  */
 471
 472 #undef  OBJC_GEN_METHOD_LABEL
 473 #define OBJC_GEN_METHOD_LABEL(BUF,IS_INST,CLASS_NAME,CAT_NAME,SEL_NAME,NUM) \
 474   do { if (CAT_NAME)                                                    \
 475          sprintf (BUF, "%c[%s(%s) %s]", (IS_INST) ? '-' : '+',          \
 476                   (CLASS_NAME), (CAT_NAME), (SEL_NAME));                \
 477        else                                                             \
 478          sprintf (BUF, "%c[%s %s]", (IS_INST) ? '-' : '+',              \
 479                   (CLASS_NAME), (SEL_NAME));                            \
 480      } while (0)
 481
 482 /* The RTTI data (e.g., __ti4name) is common and public (and static),
 483    but it does need to be referenced via indirect PIC data pointers.
 484    The machopic_define_symbol calls are telling the machopic subsystem
 485    that the name *is* defined in this module, so it doesn't need to
 486    make them indirect.  */
 487
 488 #undef ASM_DECLARE_OBJECT_NAME
 489 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL)                       \
 490   do {                                                                  \
 491     const char *xname = NAME;                                           \
 492     if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF)             \
 493       xname = IDENTIFIER_POINTER (DECL_NAME (DECL));                    \
 494     if (! DECL_WEAK (DECL)                                              \
 495         && ((TREE_STATIC (DECL)                                         \
 496              && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))           \
 497             || DECL_INITIAL (DECL)))                                    \
 498         machopic_define_symbol (DECL_RTL (DECL));                       \
 499     if ((TREE_STATIC (DECL)                                             \
 500          && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))               \
 501         || DECL_INITIAL (DECL))                                         \
 502       (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false);   \
 503     ASM_OUTPUT_LABEL (FILE, xname);                                     \
 504     /* Darwin doesn't support zero-size objects, so give them a         \
 505        byte.  */                                                        \
 506     if (tree_low_cst (DECL_SIZE_UNIT (DECL), 1) == 0)                   \
 507       assemble_zeros (1);                                               \
 508   } while (0)
 509
 510 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL)                     \
 511   do {                                                                  \
 512     const char *xname = NAME;                                           \
 513     if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF)             \
 514       xname = IDENTIFIER_POINTER (DECL_NAME (DECL));                    \
 515     if (! DECL_WEAK (DECL)                                              \
 516         && ((TREE_STATIC (DECL)                                         \
 517              && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))           \
 518             || DECL_INITIAL (DECL)))                                    \
 519         machopic_define_symbol (DECL_RTL (DECL));                       \
 520     if ((TREE_STATIC (DECL)                                             \
 521          && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))               \
 522         || DECL_INITIAL (DECL))                                         \
 523       (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false);   \
 524     ASM_OUTPUT_LABEL (FILE, xname);                                     \
 525   } while (0)
 526
 527 #define ASM_DECLARE_CONSTANT_NAME(FILE, NAME, EXP, SIZE)        \
 528   do {                                                          \
 529     ASM_OUTPUT_LABEL (FILE, NAME);                              \
 530     /* Darwin doesn't support zero-size objects, so give them a \
 531        byte.  */                                                \
 532     if ((SIZE) == 0)                                            \
 533       assemble_zeros (1);                                       \
 534   } while (0)
 535
 536 /* Wrap new method names in quotes so the assembler doesn't gag.
 537    Make Objective-C internal symbols local.  */
 538
 539 #undef  ASM_OUTPUT_LABELREF
 540 #define ASM_OUTPUT_LABELREF(FILE,NAME)                                       \
 541   do {                                                                       \
 542        const char *xname = (NAME);                                           \
 543        if (! strcmp (xname, "<pic base>"))                                   \
 544          machopic_output_function_base_name(FILE);                           \
 545        else if (xname[0] == '&' || xname[0] == '*')                          \
 546          {                                                                   \
 547            int len = strlen (xname);                                         \
 548            if (len > 6 && !strcmp ("$stub", xname + len - 5))                \
 549              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 550            else if (len > 7 && !strcmp ("$stub\"", xname + len - 6))         \
 551              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 552            else if (len > 14 && !strcmp ("$non_lazy_ptr", xname + len - 13)) \
 553              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 554            else if (len > 15 && !strcmp ("$non_lazy_ptr\"", xname + len - 14)) \
 555              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 556            if (xname[1] != '"' && name_needs_quotes (&xname[1]))             \
 557              fprintf (FILE, "\"%s\"", &xname[1]);                            \
 558            else                                                              \
 559              fputs (&xname[1], FILE);                                        \
 560          }                                                                   \
 561        else if (xname[0] == '+' || xname[0] == '-')                          \
 562          fprintf (FILE, "\"%s\"", xname);                                    \
 563        else if (!strncmp (xname, "_OBJC_", 6))                               \
 564          fprintf (FILE, "L%s", xname);                                       \
 565        else if (!strncmp (xname, ".objc_class_name_", 17))                   \
 566          fprintf (FILE, "%s", xname);                                        \
 567        else if (xname[0] != '"' && name_needs_quotes (xname))                \
 568          fprintf (FILE, "\"%s\"", xname);                                    \
 569        else                                                                  \
 570          asm_fprintf (FILE, "%U%s", xname);                                  \
 571   } while (0)
 572
 573 /* Output before executable code.  */
 574 #undef TEXT_SECTION_ASM_OP
 575 #define TEXT_SECTION_ASM_OP "\t.text"
 576
 577 /* Output before writable data.  */
 578
 579 #undef DATA_SECTION_ASM_OP
 580 #define DATA_SECTION_ASM_OP "\t.data"
 581
 582 #undef  ALIGN_ASM_OP
 583 #define ALIGN_ASM_OP            ".align"
 584
 585 #undef  ASM_OUTPUT_ALIGN
 586 #define ASM_OUTPUT_ALIGN(FILE,LOG)      \
 587   if ((LOG) != 0)                       \
 588     fprintf (FILE, "\t%s %d\n", ALIGN_ASM_OP, (LOG))
 589
 590 /* Ensure correct alignment of bss data.  */
 591
 592 #undef  ASM_OUTPUT_ALIGNED_DECL_LOCAL
 593 #define ASM_OUTPUT_ALIGNED_DECL_LOCAL(FILE, DECL, NAME, SIZE, ALIGN)    \
 594   do {                                                                  \
 595     unsigned HOST_WIDE_INT _new_size = SIZE;                            \
 596     fputs (".lcomm ", (FILE));                                          \
 597     assemble_name ((FILE), (NAME));                                     \
 598     if (_new_size == 0) _new_size = 1;                                  \
 599     fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED",%u\n", _new_size, \
 600              floor_log2 ((ALIGN) / BITS_PER_UNIT));                     \
 601     if ((DECL) && ((TREE_STATIC (DECL)                                  \
 602          && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))               \
 603         || DECL_INITIAL (DECL)))                                        \
 604       {                                                                 \
 605         (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false); \
 606         machopic_define_symbol (DECL_RTL (DECL));                       \
 607       }                                                                 \
 608   } while (0)
 609
 610 /* The maximum alignment which the object file format can support.
 611    For Mach-O, this is 2^15.  */
 612
 613 #undef  MAX_OFILE_ALIGNMENT
 614 #define MAX_OFILE_ALIGNMENT 0x8000
 615
 616 /* Create new Mach-O sections.  */
 617
 618 #undef  SECTION_FUNCTION
 619 #define SECTION_FUNCTION(FUNCTION, SECTION, DIRECTIVE, OBJC)            \
 620 extern void FUNCTION (void);                                            \
 621 void                                                                    \
 622 FUNCTION (void)                                                         \
 623 {                                                                       \
 624   if (in_section != SECTION)                                            \
 625     {                                                                   \
 626       if (OBJC)                                                         \
 627         objc_section_init ();                                           \
 628       if (asm_out_file)                                                 \
 629         fputs ("\t" DIRECTIVE "\n", asm_out_file);                      \
 630       in_section = SECTION;                                             \
 631       if ((SECTION == in_text_coal)                                     \
 632           || (SECTION == in_text_unlikely)                              \
 633           || (SECTION == in_text_unlikely_coal))                        \
 634         last_text_section = SECTION;                                    \
 635     }                                                                   \
 636 }                                                                       \
 637
 638 /* Darwin uses many types of special sections.  */
 639
 640 #undef  EXTRA_SECTIONS
 641 #define EXTRA_SECTIONS                                                  \
 642   in_text_coal, in_text_unlikely, in_text_unlikely_coal,                \
 643   in_const, in_const_data, in_cstring, in_literal4, in_literal8,        \
 644   in_const_coal, in_const_data_coal, in_data_coal,                      \
 645   in_constructor, in_destructor, in_mod_init, in_mod_term,              \
 646   in_objc_class, in_objc_meta_class, in_objc_category,                  \
 647   in_objc_class_vars, in_objc_instance_vars,                            \
 648   in_objc_cls_meth, in_objc_inst_meth,                                  \
 649   in_objc_cat_cls_meth, in_objc_cat_inst_meth,                          \
 650   in_objc_selector_refs,                                                \
 651   in_objc_selector_fixup,                                               \
 652   in_objc_symbols, in_objc_module_info,                                 \
 653   in_objc_protocol, in_objc_string_object,                              \
 654   in_objc_constant_string_object,                                       \
 655   in_objc_image_info,                                                   \
 656   in_objc_class_names, in_objc_meth_var_names,                          \
 657   in_objc_meth_var_types, in_objc_cls_refs,                             \
 658   in_machopic_nl_symbol_ptr,                                            \
 659   in_machopic_lazy_symbol_ptr,                                          \
 660   in_machopic_symbol_stub,                                              \
 661   in_machopic_symbol_stub1,                                             \
 662   in_machopic_picsymbol_stub,                                           \
 663   in_machopic_picsymbol_stub1,                                          \
 664   in_darwin_exception, in_darwin_eh_frame,                              \
 665   num_sections
 666
 667 #undef  EXTRA_SECTION_FUNCTIONS
 668 #define EXTRA_SECTION_FUNCTIONS                                 \
 669 static void objc_section_init (void);                           \
 670 SECTION_FUNCTION (text_coal_section,                            \
 671                   in_text_coal,                                 \
 672                   ".section __TEXT,__textcoal_nt,coalesced,"    \
 673                     "pure_instructions", 0)                     \
 674 SECTION_FUNCTION (text_unlikely_coal_section,                   \
 675                   in_text_unlikely_coal,                        \
 676                   ".section __TEXT,__text_unlikely_coal,"       \
 677                     "coalesced,pure_instructions", 0)           \
 678 SECTION_FUNCTION (const_section,                                \
 679                   in_const,                                     \
 680                   ".const", 0)                                  \
 681 SECTION_FUNCTION (const_coal_section,                           \
 682                   in_const_coal,                                \
 683                   ".section __TEXT,__const_coal,coalesced", 0)  \
 684 SECTION_FUNCTION (const_data_section,                           \
 685                   in_const_data,                                \
 686                   ".const_data", 0)                             \
 687 SECTION_FUNCTION (const_data_coal_section,                      \
 688                   in_const_data_coal,                           \
 689                   ".section __DATA,__const_coal,coalesced", 0)  \
 690 SECTION_FUNCTION (data_coal_section,                            \
 691                   in_data_coal,                                 \
 692                   ".section __DATA,__datacoal_nt,coalesced", 0) \
 693 SECTION_FUNCTION (cstring_section,                              \
 694                   in_cstring,                                   \
 695                   ".cstring", 0)                                \
 696 SECTION_FUNCTION (literal4_section,                             \
 697                   in_literal4,                                  \
 698                   ".literal4", 0)                               \
 699 SECTION_FUNCTION (literal8_section,                             \
 700                   in_literal8,                                  \
 701                   ".literal8", 0)                               \
 702 SECTION_FUNCTION (constructor_section,                          \
 703                   in_constructor,                               \
 704                   ".constructor", 0)                            \
 705 SECTION_FUNCTION (mod_init_section,                             \
 706                   in_mod_init,                                  \
 707                   ".mod_init_func", 0)                          \
 708 SECTION_FUNCTION (mod_term_section,                             \
 709                   in_mod_term,                                  \
 710                   ".mod_term_func", 0)                          \
 711 SECTION_FUNCTION (destructor_section,                           \
 712                   in_destructor,                                \
 713                   ".destructor", 0)                             \
 714 SECTION_FUNCTION (objc_class_section,                           \
 715                   in_objc_class,                                \
 716                   ".objc_class", 1)                             \
 717 SECTION_FUNCTION (objc_meta_class_section,                      \
 718                   in_objc_meta_class,                           \
 719                   ".objc_meta_class", 1)                        \
 720 SECTION_FUNCTION (objc_category_section,                        \
 721                   in_objc_category,                             \
 722                 ".objc_category", 1)                            \
 723 SECTION_FUNCTION (objc_class_vars_section,                      \
 724                   in_objc_class_vars,                           \
 725                   ".objc_class_vars", 1)                        \
 726 SECTION_FUNCTION (objc_instance_vars_section,                   \
 727                   in_objc_instance_vars,                        \
 728                   ".objc_instance_vars", 1)                     \
 729 SECTION_FUNCTION (objc_cls_meth_section,                        \
 730                   in_objc_cls_meth,                             \
 731                   ".objc_cls_meth", 1)                          \
 732 SECTION_FUNCTION (objc_inst_meth_section,                       \
 733                   in_objc_inst_meth,                            \
 734                   ".objc_inst_meth", 1)                         \
 735 SECTION_FUNCTION (objc_cat_cls_meth_section,                    \
 736                   in_objc_cat_cls_meth,                         \
 737                   ".objc_cat_cls_meth", 1)                      \
 738 SECTION_FUNCTION (objc_cat_inst_meth_section,                   \
 739                   in_objc_cat_inst_meth,                        \
 740                   ".objc_cat_inst_meth", 1)                     \
 741 SECTION_FUNCTION (objc_selector_refs_section,                   \
 742                   in_objc_selector_refs,                        \
 743                   ".objc_message_refs", 1)                      \
 744 SECTION_FUNCTION (objc_selector_fixup_section,                               \
 745                   in_objc_selector_fixup,                                    \
 746                   ".section __OBJC, __sel_fixup, regular, no_dead_strip", 1) \
 747 SECTION_FUNCTION (objc_symbols_section,                                 \
 748                   in_objc_symbols,                                      \
 749                   ".objc_symbols", 1)                                   \
 750 SECTION_FUNCTION (objc_module_info_section,                             \
 751                   in_objc_module_info,                                  \
 752                   ".objc_module_info", 1)                               \
 753 SECTION_FUNCTION (objc_protocol_section,                                \
 754                   in_objc_protocol,                                     \
 755                   ".objc_protocol", 1)                                  \
 756 SECTION_FUNCTION (objc_string_object_section,                           \
 757                   in_objc_string_object,                                \
 758                   ".objc_string_object", 1)                             \
 759 SECTION_FUNCTION (objc_constant_string_object_section,                  \
 760                   in_objc_constant_string_object,                       \
 761                   ".section __OBJC, __cstring_object, regular, "        \
 762                     "no_dead_strip", 1)                                 \
 763 /* Fix-and-Continue image marker.  */                                   \
 764 SECTION_FUNCTION (objc_image_info_section,                              \
 765                   in_objc_image_info,                                   \
 766                   ".section __OBJC, __image_info, regular, "            \
 767                     "no_dead_strip", 1)                                 \
 768 SECTION_FUNCTION (objc_class_names_section,                             \
 769                 in_objc_class_names,                                    \
 770                 ".objc_class_names", 1)                                 \
 771 SECTION_FUNCTION (objc_meth_var_names_section,                          \
 772                 in_objc_meth_var_names,                                 \
 773                 ".objc_meth_var_names", 1)                              \
 774 SECTION_FUNCTION (objc_meth_var_types_section,                          \
 775                 in_objc_meth_var_types,                                 \
 776                 ".objc_meth_var_types", 1)                              \
 777 SECTION_FUNCTION (objc_cls_refs_section,                                \
 778                 in_objc_cls_refs,                                       \
 779                 ".objc_cls_refs", 1)                                    \
 780 \
 781 SECTION_FUNCTION (machopic_lazy_symbol_ptr_section,                     \
 782                 in_machopic_lazy_symbol_ptr,                            \
 783                 ".lazy_symbol_pointer", 0)                              \
 784 SECTION_FUNCTION (machopic_nl_symbol_ptr_section,                       \
 785                 in_machopic_nl_symbol_ptr,                              \
 786                 ".non_lazy_symbol_pointer", 0)                          \
 787 SECTION_FUNCTION (machopic_symbol_stub_section,                         \
 788                 in_machopic_symbol_stub,                                \
 789                 ".symbol_stub", 0)                                      \
 790 SECTION_FUNCTION (machopic_symbol_stub1_section,                        \
 791                 in_machopic_symbol_stub1,                               \
 792                 ".section __TEXT,__symbol_stub1,symbol_stubs,"          \
 793                   "pure_instructions,16", 0)                            \
 794 SECTION_FUNCTION (machopic_picsymbol_stub_section,                      \
 795                 in_machopic_picsymbol_stub,                             \
 796                 ".picsymbol_stub", 0)                                   \
 797 SECTION_FUNCTION (machopic_picsymbol_stub1_section,                     \
 798                 in_machopic_picsymbol_stub1,                            \
 799                 ".section __TEXT,__picsymbolstub1,symbol_stubs,"        \
 800                   "pure_instructions,32", 0)                            \
 801 SECTION_FUNCTION (darwin_exception_section,                             \
 802                 in_darwin_exception,                                    \
 803                 ".section __DATA,__gcc_except_tab", 0)                  \
 804 SECTION_FUNCTION (darwin_eh_frame_section,                              \
 805                 in_darwin_eh_frame,                                     \
 806                 ".section " EH_FRAME_SECTION_NAME ",__eh_frame"         \
 807                   EH_FRAME_SECTION_ATTR, 0)                             \
 808 \
 809 static void                                     \
 810 objc_section_init (void)                        \
 811 {                                               \
 812   static int been_here = 0;                     \
 813                                                 \
 814   if (been_here == 0)                           \
 815     {                                           \
 816       been_here = 1;                            \
 817           /* written, cold -> hot */            \
 818       objc_cat_cls_meth_section ();             \
 819       objc_cat_inst_meth_section ();            \
 820       objc_string_object_section ();            \
 821       objc_constant_string_object_section ();   \
 822       objc_selector_refs_section ();            \
 823       objc_selector_fixup_section ();           \
 824       objc_cls_refs_section ();                 \
 825       objc_class_section ();                    \
 826       objc_meta_class_section ();               \
 827           /* shared, hot -> cold */             \
 828       objc_cls_meth_section ();                 \
 829       objc_inst_meth_section ();                \
 830       objc_protocol_section ();                 \
 831       objc_class_names_section ();              \
 832       objc_meth_var_types_section ();           \
 833       objc_meth_var_names_section ();           \
 834       objc_category_section ();                 \
 835       objc_class_vars_section ();               \
 836       objc_instance_vars_section ();            \
 837       objc_module_info_section ();              \
 838       objc_symbols_section ();                  \
 839     }                                           \
 840 }
 841
 842 #define READONLY_DATA_SECTION const_section
 843
 844 #undef  TARGET_ASM_SELECT_SECTION
 845 #define TARGET_ASM_SELECT_SECTION machopic_select_section
 846 #define USE_SELECT_SECTION_FOR_FUNCTIONS
 847
 848 #undef  TARGET_ASM_SELECT_RTX_SECTION
 849 #define TARGET_ASM_SELECT_RTX_SECTION machopic_select_rtx_section
 850 #undef  TARGET_ASM_UNIQUE_SECTION
 851 #define TARGET_ASM_UNIQUE_SECTION darwin_unique_section
 852 #undef  TARGET_ASM_FUNCTION_RODATA_SECTION
 853 #define TARGET_ASM_FUNCTION_RODATA_SECTION default_no_function_rodata_section
 854
 855
 856 #define ASM_DECLARE_UNRESOLVED_REFERENCE(FILE,NAME)                     \
 857     do {                                                                \
 858          if (FILE) {                                                    \
 859            if (MACHOPIC_INDIRECT)                                       \
 860              fprintf (FILE, "\t.lazy_reference ");                      \
 861            else                                                         \
 862              fprintf (FILE, "\t.reference ");                           \
 863            assemble_name (FILE, NAME);                                  \
 864            fprintf (FILE, "\n");                                        \
 865          }                                                              \
 866        } while (0)
 867
 868 #define ASM_DECLARE_CLASS_REFERENCE(FILE,NAME)                          \
 869     do {                                                                \
 870          if (FILE) {                                                    \
 871            fprintf (FILE, "\t");                                        \
 872            assemble_name (FILE, NAME);                                  \
 873            fprintf (FILE, "=0\n");                                      \
 874            (*targetm.asm_out.globalize_label) (FILE, NAME);             \
 875          }                                                              \
 876        } while (0)
 877
 878 /* Globalizing directive for a label.  */
 879 #define GLOBAL_ASM_OP ".globl "
 880 #define TARGET_ASM_GLOBALIZE_LABEL darwin_globalize_label
 881
 882 /* Emit an assembler directive to set visibility for a symbol.  Used
 883    to support visibility attribute and Darwin's private extern
 884    feature.  */
 885 #undef TARGET_ASM_ASSEMBLE_VISIBILITY
 886 #define TARGET_ASM_ASSEMBLE_VISIBILITY darwin_assemble_visibility
 887
 888 /* Extra attributes for Darwin.  */
 889 #define SUBTARGET_ATTRIBUTE_TABLE                                            \
 890   /* { name, min_len, max_len, decl_req, type_req, fn_type_req, handler } */ \
 891   { "weak_import", 0, 0, true, false, false,                                 \
 892     darwin_handle_weak_import_attribute }
 893
 894 #undef ASM_GENERATE_INTERNAL_LABEL
 895 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM)   \
 896   sprintf (LABEL, "*%s%ld", PREFIX, (long)(NUM))
 897
 898 #undef TARGET_ASM_MARK_DECL_PRESERVED
 899 #define TARGET_ASM_MARK_DECL_PRESERVED darwin_mark_decl_preserved
 900
 901 /* Set on a symbol with SYMBOL_FLAG_FUNCTION or
 902    MACHO_SYMBOL_FLAG_VARIABLE to indicate that the function or
 903    variable has been defined in this translation unit.  */
 904
 905 #define MACHO_SYMBOL_FLAG_VARIABLE (SYMBOL_FLAG_MACH_DEP)
 906 #define MACHO_SYMBOL_FLAG_DEFINED ((SYMBOL_FLAG_MACH_DEP) << 1)
 907
 908 /* Set on a symbol to indicate when fix-and-continue style code
 909    generation is being used and the symbol refers to a static symbol
 910    that should be rebound from new instances of a translation unit to
 911    the original instance of the data.  */
 912
 913 #define MACHO_SYMBOL_STATIC ((SYMBOL_FLAG_MACH_DEP) << 2)
 914
 915 /* Symbolic names for various things we might know about a symbol.  */
 916
 917 enum machopic_addr_class {
 918   MACHOPIC_UNDEFINED,
 919   MACHOPIC_DEFINED_DATA,
 920   MACHOPIC_UNDEFINED_DATA,
 921   MACHOPIC_DEFINED_FUNCTION,
 922   MACHOPIC_UNDEFINED_FUNCTION
 923 };
 924
 925 /* Macros defining the various PIC cases.  */
 926
 927 #define MACHO_DYNAMIC_NO_PIC_P  (TARGET_DYNAMIC_NO_PIC)
 928 #define MACHOPIC_INDIRECT       (flag_pic || MACHO_DYNAMIC_NO_PIC_P)
 929 #define MACHOPIC_JUST_INDIRECT  (flag_pic == 1 || MACHO_DYNAMIC_NO_PIC_P)
 930 #define MACHOPIC_PURE           (flag_pic == 2 && ! MACHO_DYNAMIC_NO_PIC_P)
 931
 932 #undef TARGET_ENCODE_SECTION_INFO
 933 #define TARGET_ENCODE_SECTION_INFO  darwin_encode_section_info
 934 #undef TARGET_STRIP_NAME_ENCODING
 935 #define TARGET_STRIP_NAME_ENCODING  default_strip_name_encoding
 936
 937 #define GEN_BINDER_NAME_FOR_STUB(BUF,STUB,STUB_LENGTH)          \
 938   do {                                                          \
 939     const char *const stub_ = (STUB);                           \
 940     char *buffer_ = (BUF);                                      \
 941     strcpy (buffer_, stub_);                                    \
 942     if (stub_[0] == '"')                                        \
 943       {                                                         \
 944         strcpy (buffer_ + (STUB_LENGTH) - 1, "_binder\"");      \
 945       }                                                         \
 946     else                                                        \
 947       {                                                         \
 948         strcpy (buffer_ + (STUB_LENGTH), "_binder");            \
 949       }                                                         \
 950   } while (0)
 951
 952 #define GEN_SYMBOL_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH)    \
 953   do {                                                          \
 954     const char *const symbol_ = (SYMBOL);                       \
 955     char *buffer_ = (BUF);                                      \
 956     if (name_needs_quotes (symbol_) && symbol_[0] != '"')       \
 957       {                                                         \
 958           sprintf (buffer_, "\"%s\"", symbol_);                 \
 959       }                                                         \
 960     else                                                        \
 961       {                                                         \
 962         strcpy (buffer_, symbol_);                              \
 963       }                                                         \
 964   } while (0)
 965
 966 /* Given a symbol name string, create the lazy pointer version
 967    of the symbol name.  */
 968
 969 #define GEN_LAZY_PTR_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH)  \
 970   do {                                                          \
 971     const char *symbol_ = (SYMBOL);                             \
 972     char *buffer_ = (BUF);                                      \
 973     if (symbol_[0] == '"')                                      \
 974       {                                                         \
 975         strcpy (buffer_, "\"L");                                \
 976         strcpy (buffer_ + 2, symbol_ + 1);                      \
 977         strcpy (buffer_ + (SYMBOL_LENGTH), "$lazy_ptr\"");      \
 978       }                                                         \
 979     else if (name_needs_quotes (symbol_))                       \
 980       {                                                         \
 981         strcpy (buffer_, "\"L");                                \
 982         strcpy (buffer_ + 2, symbol_);                          \
 983         strcpy (buffer_ + (SYMBOL_LENGTH) + 2, "$lazy_ptr\"");  \
 984       }                                                         \
 985     else                                                        \
 986       {                                                         \
 987         strcpy (buffer_, "L");                                  \
 988         strcpy (buffer_ + 1, symbol_);                          \
 989         strcpy (buffer_ + (SYMBOL_LENGTH) + 1, "$lazy_ptr");    \
 990       }                                                         \
 991   } while (0)
 992
 993 #define TARGET_ASM_EXCEPTION_SECTION darwin_exception_section
 994
 995 #define TARGET_ASM_EH_FRAME_SECTION darwin_eh_frame_section
 996
 997 #define EH_FRAME_SECTION_NAME   "__TEXT"
 998 #define EH_FRAME_SECTION_ATTR ",coalesced,no_toc+strip_static_syms+live_support"
 999
1000 /* Java runtime class list.  */
1001 #define JCR_SECTION_NAME "__DATA,jcr,regular,no_dead_strip"
1002
1003 #undef ASM_PREFERRED_EH_DATA_FORMAT
1004 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL)  \
1005   (((CODE) == 2 && (GLOBAL) == 1) \
1006    ? (DW_EH_PE_pcrel | DW_EH_PE_indirect | DW_EH_PE_sdata4) : \
1007      ((CODE) == 1 || (GLOBAL) == 0) ? DW_EH_PE_pcrel : DW_EH_PE_absptr)
1008
1009 #define ASM_OUTPUT_DWARF_DELTA(FILE,SIZE,LABEL1,LABEL2)  \
1010   darwin_asm_output_dwarf_delta (FILE, SIZE, LABEL1, LABEL2)
1011
1012 #define ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX(ASM_OUT_FILE, ENCODING, SIZE, ADDR, DONE)     \
1013       if (ENCODING == ASM_PREFERRED_EH_DATA_FORMAT (2, 1)) {                            \
1014         darwin_non_lazy_pcrel (ASM_OUT_FILE, ADDR);                                     \
1015         goto DONE;                                                                      \
1016       }
1017
1018 /* Experimentally, putting jump tables in text is faster on SPEC.
1019    Also this is needed for correctness for coalesced functions.  */
1020
1021 #ifndef JUMP_TABLES_IN_TEXT_SECTION
1022 #define JUMP_TABLES_IN_TEXT_SECTION 1
1023 #endif
1024
1025 #define TARGET_TERMINATE_DW2_EH_FRAME_INFO false
1026
1027 #undef TARGET_ASM_NAMED_SECTION
1028 #define TARGET_ASM_NAMED_SECTION darwin_asm_named_section
1029
1030 #define DARWIN_REGISTER_TARGET_PRAGMAS()                        \
1031   do {                                                          \
1032     c_register_pragma (0, "mark", darwin_pragma_ignore);        \
1033     c_register_pragma (0, "options", darwin_pragma_options);    \
1034     c_register_pragma (0, "segment", darwin_pragma_ignore);     \
1035     c_register_pragma (0, "unused", darwin_pragma_unused);      \
1036   } while (0)
1037
1038 #undef ASM_APP_ON
1039 #define ASM_APP_ON ""
1040 #undef ASM_APP_OFF
1041 #define ASM_APP_OFF ""
1042
1043 void darwin_register_frameworks (const char *, const char *, int);
1044 void darwin_register_objc_includes (const char *, const char *, int);
1045 #define TARGET_EXTRA_PRE_INCLUDES darwin_register_objc_includes
1046 #define TARGET_EXTRA_INCLUDES darwin_register_frameworks
1047
1048 void add_framework_path (char *);
1049 #define TARGET_OPTF add_framework_path
1050
1051 #define TARGET_POSIX_IO
1052
1053 /* All new versions of Darwin have C99 functions.  */
1054 #define TARGET_C99_FUNCTIONS 1
1055
1056 #define WINT_TYPE "int"
1057
1058 #endif /* CONFIG_DARWIN_H */