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, 59 Temple Place - Suite 330,
  22 Boston, MA 02111-1307, 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 /* Nonzero if the user has chosen to force sizeof(bool) to be 1
 144    by providing the -mone-byte-bool switch.  It would be better
 145    to use SUBTARGET_SWITCHES for this instead of SUBTARGET_OPTIONS,
 146    but there are no more bits in rs6000 TARGET_SWITCHES.  Note
 147    that this switch has no "no-" variant. */
 148 extern const char *darwin_one_byte_bool;
 149
 150 extern int darwin_fix_and_continue;
 151 extern const char *darwin_fix_and_continue_switch;
 152
 153 #undef SUBTARGET_OPTIONS
 154 #define SUBTARGET_OPTIONS \
 155   {"one-byte-bool", &darwin_one_byte_bool, N_("Set sizeof(bool) to 1"), 0 }, \
 156   {"fix-and-continue", &darwin_fix_and_continue_switch,                 \
 157    N_("Generate code suitable for fast turn around debugging"), 0},     \
 158   {"no-fix-and-continue", &darwin_fix_and_continue_switch,              \
 159    N_("Don't generate code suitable for fast turn around debugging"), 0}
 160
 161 /* These compiler options take n arguments.  */
 162
 163 #undef  WORD_SWITCH_TAKES_ARG
 164 #define WORD_SWITCH_TAKES_ARG(STR)              \
 165   (DEFAULT_WORD_SWITCH_TAKES_ARG (STR) ? 1 :    \
 166    !strcmp (STR, "Zallowable_client") ? 1 :     \
 167    !strcmp (STR, "arch") ? 1 :                  \
 168    !strcmp (STR, "arch_only") ? 1 :             \
 169    !strcmp (STR, "Zbundle_loader") ? 1 :        \
 170    !strcmp (STR, "client_name") ? 1 :           \
 171    !strcmp (STR, "compatibility_version") ? 1 : \
 172    !strcmp (STR, "current_version") ? 1 :       \
 173    !strcmp (STR, "Zdylib_file") ? 1 :           \
 174    !strcmp (STR, "Zexported_symbols_list") ? 1 : \
 175    !strcmp (STR, "Zimage_base") ? 1 :           \
 176    !strcmp (STR, "Zinit") ? 1 :                 \
 177    !strcmp (STR, "Zinstall_name") ? 1 :         \
 178    !strcmp (STR, "Zmultiplydefinedunused") ? 1 : \
 179    !strcmp (STR, "Zmultiply_defined") ? 1 :     \
 180    !strcmp (STR, "precomp-trustfile") ? 1 :     \
 181    !strcmp (STR, "read_only_relocs") ? 1 :      \
 182    !strcmp (STR, "sectcreate") ? 3 :            \
 183    !strcmp (STR, "sectorder") ? 3 :             \
 184    !strcmp (STR, "Zsegaddr") ? 2 :              \
 185    !strcmp (STR, "Zsegs_read_only_addr") ? 1 :  \
 186    !strcmp (STR, "Zsegs_read_write_addr") ? 1 : \
 187    !strcmp (STR, "Zseg_addr_table") ? 1 :       \
 188    !strcmp (STR, "Zseg_addr_table_filename") ?1 :\
 189    !strcmp (STR, "seg1addr") ? 1 :              \
 190    !strcmp (STR, "segprot") ? 3 :               \
 191    !strcmp (STR, "sub_library") ? 1 :           \
 192    !strcmp (STR, "sub_umbrella") ? 1 :          \
 193    !strcmp (STR, "umbrella") ? 1 :              \
 194    !strcmp (STR, "undefined") ? 1 :             \
 195    !strcmp (STR, "Zunexported_symbols_list") ? 1 : \
 196    !strcmp (STR, "Zweak_reference_mismatches") ? 1 : \
 197    !strcmp (STR, "pagezero_size") ? 1 :         \
 198    !strcmp (STR, "segs_read_only_addr") ? 1 :   \
 199    !strcmp (STR, "segs_read_write_addr") ? 1 :  \
 200    !strcmp (STR, "sectalign") ? 3 :             \
 201    !strcmp (STR, "sectobjectsymbols") ? 2 :     \
 202    !strcmp (STR, "segcreate") ? 3 :             \
 203    !strcmp (STR, "dylinker_install_name") ? 1 : \
 204    0)
 205
 206 /* Machine dependent cpp options.  __APPLE_CC__ is defined as the
 207    Apple include files expect it to be defined and won't work if it
 208    isn't.  */
 209
 210 #undef  CPP_SPEC
 211 #define CPP_SPEC "%{static:%{!dynamic:-D__STATIC__}}%{!static:-D__DYNAMIC__}\
 212     -D__APPLE_CC__=1"
 213
 214 /* This is mostly a clone of the standard LINK_COMMAND_SPEC, plus
 215    precomp, libtool, and fat build additions.  Also we
 216    don't specify a second %G after %L because libSystem is
 217    self-contained and doesn't need to link against libgcc.a.  */
 218 /* In general, random Darwin linker flags should go into LINK_SPEC
 219    instead of LINK_COMMAND_SPEC.  The command spec is better for
 220    specifying the handling of options understood by generic Unix
 221    linkers, and for positional arguments like libraries.  */
 222 #define LINK_COMMAND_SPEC "\
 223 %{!fdump=*:%{!fsyntax-only:%{!precomp:%{!c:%{!M:%{!MM:%{!E:%{!S:\
 224     %{!Zdynamiclib:%(linker)}%{Zdynamiclib:/usr/bin/libtool} \
 225     %l %X %{d} %{s} %{t} %{Z} \
 226     %{!Zdynamiclib:%{A} %{e*} %{m} %{N} %{n} %{r} %{u*} %{x} %{z}} \
 227     %{@:-o %f%u.out}%{!@:%{o*}%{!o:-o a.out}} \
 228     %{!Zdynamiclib:%{!A:%{!nostdlib:%{!nostartfiles:%S}}}} \
 229     %{L*} %(link_libgcc) %o %{fprofile-arcs|fprofile-generate|coverage:-lgcov} \
 230     %{!nostdlib:%{!nodefaultlibs:%G %L}} \
 231     %{!A:%{!nostdlib:%{!nostartfiles:%E}}} %{T*} %{F*} }}}}}}}}"
 232
 233 /* Please keep the random linker options in alphabetical order (modulo
 234    'Z' and 'no' prefixes).  Options that can only go to one of libtool
 235    or ld must be listed twice, under both !Zdynamiclib and
 236    Zdynamiclib, with one of the cases reporting an error.  */
 237 /* Note that options taking arguments may appear multiple times on a
 238    command line with different arguments each time, so put a * after
 239    their names so all of them get passed.  */
 240 #define LINK_SPEC  \
 241   "%{static}%{!static:-dynamic} \
 242    %{fgnu-runtime:%:replace-outfile(-lobjc -lobjc-gnu)}\
 243    %{!Zdynamiclib: \
 244      %{Zforce_cpusubtype_ALL:-arch %(darwin_arch) -force_cpusubtype_ALL} \
 245      %{!Zforce_cpusubtype_ALL:-arch %(darwin_subarch)} \
 246      %{Zbundle:-bundle} \
 247      %{Zbundle_loader*:-bundle_loader %*} \
 248      %{client_name*} \
 249      %{compatibility_version*:%e-compatibility_version only allowed with -dynamiclib\
 250 } \
 251      %{current_version*:%e-current_version only allowed with -dynamiclib} \
 252      %{Zforce_flat_namespace:-force_flat_namespace} \
 253      %{Zinstall_name*:%e-install_name only allowed with -dynamiclib} \
 254      %{keep_private_externs} \
 255      %{private_bundle} \
 256     } \
 257    %{Zdynamiclib: \
 258      %{Zbundle:%e-bundle not allowed with -dynamiclib} \
 259      %{Zbundle_loader*:%e-bundle_loader not allowed with -dynamiclib} \
 260      %{client_name*:%e-client_name not allowed with -dynamiclib} \
 261      %{compatibility_version*} \
 262      %{current_version*} \
 263      %{Zforce_cpusubtype_ALL:-arch_only %(darwin_arch)} \
 264      %{!Zforce_cpusubtype_ALL: -arch_only %(darwin_subarch)} \
 265      %{Zforce_flat_namespace:%e-force_flat_namespace not allowed with -dynamiclib} \
 266      %{Zinstall_name*:-install_name %*} \
 267      %{keep_private_externs:%e-keep_private_externs not allowed with -dynamiclib} \
 268      %{private_bundle:%e-private_bundle not allowed with -dynamiclib} \
 269     } \
 270    %{Zall_load:-all_load}%{Zdynamiclib:%{!Zall_load:-noall_load}} \
 271    %{Zallowable_client*:-allowable_client %*} \
 272    %{Zbind_at_load:-bind_at_load} \
 273    %{Zarch_errors_fatal:-arch_errors_fatal} \
 274    %{Zdead_strip:-dead_strip} \
 275    %{Zno_dead_strip_inits_and_terms:-no_dead_strip_inits_and_terms} \
 276    %{Zdylib_file*:-dylib_file %*} \
 277    %{Zdynamic:-dynamic}\
 278    %{Zexported_symbols_list*:-exported_symbols_list %*} \
 279    %{Zflat_namespace:-flat_namespace} \
 280    %{headerpad_max_install_names*} \
 281    %{Zimage_base*:-image_base %*} \
 282    %{Zinit*:-init %*} \
 283    %{nomultidefs} \
 284    %{Zmulti_module:-multi_module} %{Zsingle_module:-single_module} \
 285    %{Zmultiply_defined*:-multiply_defined %*} \
 286    %{Zmultiplydefinedunused*:-multiply_defined_unused %*} \
 287    %{prebind} %{noprebind} %{nofixprebinding} %{prebind_all_twolevel_modules} \
 288    %{read_only_relocs} \
 289    %{sectcreate*} %{sectorder*} %{seg1addr*} %{segprot*} \
 290    %{Zsegaddr*:-segaddr %*} \
 291    %{Zsegs_read_only_addr*:-segs_read_only_addr %*} \
 292    %{Zsegs_read_write_addr*:-segs_read_write_addr %*} \
 293    %{Zseg_addr_table*: -seg_addr_table %*} \
 294    %{Zseg_addr_table_filename*:-seg_addr_table_filename %*} \
 295    %{sub_library*} %{sub_umbrella*} \
 296    %{twolevel_namespace} %{twolevel_namespace_hints} \
 297    %{umbrella*} \
 298    %{undefined*} \
 299    %{Zunexported_symbols_list*:-unexported_symbols_list %*} \
 300    %{Zweak_reference_mismatches*:-weak_reference_mismatches %*} \
 301    %{!Zweak_reference_mismatches*:-weak_reference_mismatches non-weak} \
 302    %{X} \
 303    %{y*} \
 304    %{w} \
 305    %{pagezero_size*} %{segs_read_*} %{seglinkedit} %{noseglinkedit}  \
 306    %{sectalign*} %{sectobjectsymbols*} %{segcreate*} %{whyload} \
 307    %{whatsloaded} %{dylinker_install_name*} \
 308    %{dylinker} %{Mach} "
 309
 310
 311 /* Machine dependent libraries but do not redefine it if we already on 7.0 and
 312    above as it needs to link with libmx also.  */
 313
 314 #ifndef LIB_SPEC
 315 #define LIB_SPEC "%{!static:-lSystem}"
 316 #endif
 317
 318 /* -dynamiclib implies -shared-libgcc just like -shared would on linux.  */
 319 #define REAL_LIBGCC_SPEC \
 320    "%{static|static-libgcc:-lgcc -lgcc_eh}\
 321     %{!static:%{!static-libgcc:\
 322       %{!Zdynamiclib:%{!shared-libgcc:-lgcc -lgcc_eh}\
 323       %{shared-libgcc:-lgcc_s -lgcc}} %{Zdynamiclib:-lgcc_s -lgcc}}}"
 324
 325 /* We specify crt0.o as -lcrt0.o so that ld will search the library path.  */
 326 /* We don't want anything to do with crt2.o in the 64-bit case;
 327    testing the PowerPC-specific -m64 flag here is a little irregular,
 328    but it's overkill to make copies of this spec for each target
 329    arch.  */
 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 %{!m64: crt2.o%s}}}}} \
 338                 %{!pg:%{static:-lcrt0.o} \
 339                       %{!static:%{object:-lcrt0.o} \
 340                                 %{!object:%{preload:-lcrt0.o} \
 341                                   %{!preload:-lcrt1.o %{!m64: crt2.o%s}}}}}}}"
 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 ("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            fputs (&xname[1], FILE);                                          \
 555          }                                                                   \
 556        else if (xname[0] == '+' || xname[0] == '-')                          \
 557          fprintf (FILE, "\"%s\"", xname);                                    \
 558        else if (!strncmp (xname, "_OBJC_", 6))                               \
 559          fprintf (FILE, "L%s", xname);                                       \
 560        else if (!strncmp (xname, ".objc_class_name_", 17))                   \
 561          fprintf (FILE, "%s", xname);                                        \
 562        else                                                                  \
 563          asm_fprintf (FILE, "%U%s", xname);                                  \
 564   } while (0)
 565
 566 /* Output before executable code.  */
 567 #undef TEXT_SECTION_ASM_OP
 568 #define TEXT_SECTION_ASM_OP "\t.text"
 569
 570 /* Output before writable data.  */
 571
 572 #undef DATA_SECTION_ASM_OP
 573 #define DATA_SECTION_ASM_OP "\t.data"
 574
 575 #undef  ALIGN_ASM_OP
 576 #define ALIGN_ASM_OP            ".align"
 577
 578 #undef  ASM_OUTPUT_ALIGN
 579 #define ASM_OUTPUT_ALIGN(FILE,LOG)      \
 580   if ((LOG) != 0)                       \
 581     fprintf (FILE, "\t%s %d\n", ALIGN_ASM_OP, (LOG))
 582
 583 /* Ensure correct alignment of bss data.  */
 584
 585 #undef  ASM_OUTPUT_ALIGNED_DECL_LOCAL
 586 #define ASM_OUTPUT_ALIGNED_DECL_LOCAL(FILE, DECL, NAME, SIZE, ALIGN)    \
 587   do {                                                                  \
 588     fputs (".lcomm ", (FILE));                                          \
 589     assemble_name ((FILE), (NAME));                                     \
 590     fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED",%u\n", (SIZE),    \
 591              floor_log2 ((ALIGN) / BITS_PER_UNIT));                     \
 592     if ((DECL) && ((TREE_STATIC (DECL)                                  \
 593          && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))               \
 594         || DECL_INITIAL (DECL)))                                        \
 595       {                                                                 \
 596         (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false); \
 597         machopic_define_symbol (DECL_RTL (DECL));                       \
 598       }                                                                 \
 599   } while (0)
 600
 601 /* The maximum alignment which the object file format can support.
 602    For Mach-O, this is 2^15.  */
 603
 604 #undef  MAX_OFILE_ALIGNMENT
 605 #define MAX_OFILE_ALIGNMENT 0x8000
 606
 607 /* Create new Mach-O sections.  */
 608
 609 #undef  SECTION_FUNCTION
 610 #define SECTION_FUNCTION(FUNCTION, SECTION, DIRECTIVE, OBJC)            \
 611 extern void FUNCTION (void);                                            \
 612 void                                                                    \
 613 FUNCTION (void)                                                         \
 614 {                                                                       \
 615   if (in_section != SECTION)                                            \
 616     {                                                                   \
 617       if (OBJC)                                                         \
 618         objc_section_init ();                                           \
 619       if (asm_out_file)                                                 \
 620         fputs ("\t" DIRECTIVE "\n", asm_out_file);                      \
 621       in_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_section,                        \
 662                   in_text_unlikely,                             \
 663                   ".section __TEXT,__text_unlikely,coalesced,"  \
 664                     "pure_instructions", 0)                     \
 665 SECTION_FUNCTION (text_unlikely_coal_section,                   \
 666                   in_text_unlikely_coal,                        \
 667                   ".section __TEXT,__text_unlikely_coal,"       \
 668                     "coalesced,pure_instructions", 0)           \
 669 SECTION_FUNCTION (const_section,                                \
 670                   in_const,                                     \
 671                   ".const", 0)                                  \
 672 SECTION_FUNCTION (const_coal_section,                           \
 673                   in_const_coal,                                \
 674                   ".section __TEXT,__const_coal,coalesced", 0)  \
 675 SECTION_FUNCTION (const_data_section,                           \
 676                   in_const_data,                                \
 677                   ".const_data", 0)                             \
 678 SECTION_FUNCTION (const_data_coal_section,                      \
 679                   in_const_data_coal,                           \
 680                   ".section __DATA,__const_coal,coalesced", 0)  \
 681 SECTION_FUNCTION (data_coal_section,                            \
 682                   in_data_coal,                                 \
 683                   ".section __DATA,__datacoal_nt,coalesced", 0) \
 684 SECTION_FUNCTION (cstring_section,                              \
 685                   in_cstring,                                   \
 686                   ".cstring", 0)                                \
 687 SECTION_FUNCTION (literal4_section,                             \
 688                   in_literal4,                                  \
 689                   ".literal4", 0)                               \
 690 SECTION_FUNCTION (literal8_section,                             \
 691                   in_literal8,                                  \
 692                   ".literal8", 0)                               \
 693 SECTION_FUNCTION (constructor_section,                          \
 694                   in_constructor,                               \
 695                   ".constructor", 0)                            \
 696 SECTION_FUNCTION (mod_init_section,                             \
 697                   in_mod_init,                                  \
 698                   ".mod_init_func", 0)                          \
 699 SECTION_FUNCTION (mod_term_section,                             \
 700                   in_mod_term,                                  \
 701                   ".mod_term_func", 0)                          \
 702 SECTION_FUNCTION (destructor_section,                           \
 703                   in_destructor,                                \
 704                   ".destructor", 0)                             \
 705 SECTION_FUNCTION (objc_class_section,                           \
 706                   in_objc_class,                                \
 707                   ".objc_class", 1)                             \
 708 SECTION_FUNCTION (objc_meta_class_section,                      \
 709                   in_objc_meta_class,                           \
 710                   ".objc_meta_class", 1)                        \
 711 SECTION_FUNCTION (objc_category_section,                        \
 712                   in_objc_category,                             \
 713                 ".objc_category", 1)                            \
 714 SECTION_FUNCTION (objc_class_vars_section,                      \
 715                   in_objc_class_vars,                           \
 716                   ".objc_class_vars", 1)                        \
 717 SECTION_FUNCTION (objc_instance_vars_section,                   \
 718                   in_objc_instance_vars,                        \
 719                   ".objc_instance_vars", 1)                     \
 720 SECTION_FUNCTION (objc_cls_meth_section,                        \
 721                   in_objc_cls_meth,                             \
 722                   ".objc_cls_meth", 1)                          \
 723 SECTION_FUNCTION (objc_inst_meth_section,                       \
 724                   in_objc_inst_meth,                            \
 725                   ".objc_inst_meth", 1)                         \
 726 SECTION_FUNCTION (objc_cat_cls_meth_section,                    \
 727                   in_objc_cat_cls_meth,                         \
 728                   ".objc_cat_cls_meth", 1)                      \
 729 SECTION_FUNCTION (objc_cat_inst_meth_section,                   \
 730                   in_objc_cat_inst_meth,                        \
 731                   ".objc_cat_inst_meth", 1)                     \
 732 SECTION_FUNCTION (objc_selector_refs_section,                   \
 733                   in_objc_selector_refs,                        \
 734                   ".objc_message_refs", 1)                      \
 735 SECTION_FUNCTION (objc_selector_fixup_section,                               \
 736                   in_objc_selector_fixup,                                    \
 737                   ".section __OBJC, __sel_fixup, regular, no_dead_strip", 1) \
 738 SECTION_FUNCTION (objc_symbols_section,                                 \
 739                   in_objc_symbols,                                      \
 740                   ".objc_symbols", 1)                                   \
 741 SECTION_FUNCTION (objc_module_info_section,                             \
 742                   in_objc_module_info,                                  \
 743                   ".objc_module_info", 1)                               \
 744 SECTION_FUNCTION (objc_protocol_section,                                \
 745                   in_objc_protocol,                                     \
 746                   ".objc_protocol", 1)                                  \
 747 SECTION_FUNCTION (objc_string_object_section,                           \
 748                   in_objc_string_object,                                \
 749                   ".objc_string_object", 1)                             \
 750 SECTION_FUNCTION (objc_constant_string_object_section,                  \
 751                   in_objc_constant_string_object,                       \
 752                   ".section __OBJC, __cstring_object, regular, "        \
 753                     "no_dead_strip", 1)                                 \
 754 /* Fix-and-Continue image marker.  */                                   \
 755 SECTION_FUNCTION (objc_image_info_section,                              \
 756                   in_objc_image_info,                                   \
 757                   ".section __OBJC, __image_info, regular, "            \
 758                     "no_dead_strip", 1)                                 \
 759 SECTION_FUNCTION (objc_class_names_section,                             \
 760                 in_objc_class_names,                                    \
 761                 ".objc_class_names", 1)                                 \
 762 SECTION_FUNCTION (objc_meth_var_names_section,                          \
 763                 in_objc_meth_var_names,                                 \
 764                 ".objc_meth_var_names", 1)                              \
 765 SECTION_FUNCTION (objc_meth_var_types_section,                          \
 766                 in_objc_meth_var_types,                                 \
 767                 ".objc_meth_var_types", 1)                              \
 768 SECTION_FUNCTION (objc_cls_refs_section,                                \
 769                 in_objc_cls_refs,                                       \
 770                 ".objc_cls_refs", 1)                                    \
 771 \
 772 SECTION_FUNCTION (machopic_lazy_symbol_ptr_section,                     \
 773                 in_machopic_lazy_symbol_ptr,                            \
 774                 ".lazy_symbol_pointer", 0)                              \
 775 SECTION_FUNCTION (machopic_nl_symbol_ptr_section,                       \
 776                 in_machopic_nl_symbol_ptr,                              \
 777                 ".non_lazy_symbol_pointer", 0)                          \
 778 SECTION_FUNCTION (machopic_symbol_stub_section,                         \
 779                 in_machopic_symbol_stub,                                \
 780                 ".symbol_stub", 0)                                      \
 781 SECTION_FUNCTION (machopic_symbol_stub1_section,                        \
 782                 in_machopic_symbol_stub1,                               \
 783                 ".section __TEXT,__symbol_stub1,symbol_stubs,"          \
 784                   "pure_instructions,16", 0)                            \
 785 SECTION_FUNCTION (machopic_picsymbol_stub_section,                      \
 786                 in_machopic_picsymbol_stub,                             \
 787                 ".picsymbol_stub", 0)                                   \
 788 SECTION_FUNCTION (machopic_picsymbol_stub1_section,                     \
 789                 in_machopic_picsymbol_stub1,                            \
 790                 ".section __TEXT,__picsymbolstub1,symbol_stubs,"        \
 791                   "pure_instructions,32", 0)                            \
 792 SECTION_FUNCTION (darwin_exception_section,                             \
 793                 in_darwin_exception,                                    \
 794                 ".section __DATA,__gcc_except_tab", 0)                  \
 795 SECTION_FUNCTION (darwin_eh_frame_section,                              \
 796                 in_darwin_eh_frame,                                     \
 797                 ".section " EH_FRAME_SECTION_NAME ",__eh_frame"         \
 798                   EH_FRAME_SECTION_ATTR, 0)                             \
 799 \
 800 static void                                     \
 801 objc_section_init (void)                        \
 802 {                                               \
 803   static int been_here = 0;                     \
 804                                                 \
 805   if (been_here == 0)                           \
 806     {                                           \
 807       been_here = 1;                            \
 808           /* written, cold -> hot */            \
 809       objc_cat_cls_meth_section ();             \
 810       objc_cat_inst_meth_section ();            \
 811       objc_string_object_section ();            \
 812       objc_constant_string_object_section ();   \
 813       objc_selector_refs_section ();            \
 814       objc_selector_fixup_section ();           \
 815       objc_cls_refs_section ();                 \
 816       objc_class_section ();                    \
 817       objc_meta_class_section ();               \
 818           /* shared, hot -> cold */             \
 819       objc_cls_meth_section ();                 \
 820       objc_inst_meth_section ();                \
 821       objc_protocol_section ();                 \
 822       objc_class_names_section ();              \
 823       objc_meth_var_types_section ();           \
 824       objc_meth_var_names_section ();           \
 825       objc_category_section ();                 \
 826       objc_class_vars_section ();               \
 827       objc_instance_vars_section ();            \
 828       objc_module_info_section ();              \
 829       objc_symbols_section ();                  \
 830     }                                           \
 831 }
 832
 833 #define READONLY_DATA_SECTION const_section
 834
 835 #undef  TARGET_ASM_SELECT_SECTION
 836 #define TARGET_ASM_SELECT_SECTION machopic_select_section
 837 #define USE_SELECT_SECTION_FOR_FUNCTIONS
 838
 839 #undef  TARGET_ASM_SELECT_RTX_SECTION
 840 #define TARGET_ASM_SELECT_RTX_SECTION machopic_select_rtx_section
 841 #undef  TARGET_ASM_UNIQUE_SECTION
 842 #define TARGET_ASM_UNIQUE_SECTION darwin_unique_section
 843 #undef  TARGET_ASM_FUNCTION_RODATA_SECTION
 844 #define TARGET_ASM_FUNCTION_RODATA_SECTION default_no_function_rodata_section
 845
 846
 847 #define ASM_DECLARE_UNRESOLVED_REFERENCE(FILE,NAME)                     \
 848     do {                                                                \
 849          if (FILE) {                                                    \
 850            if (MACHOPIC_INDIRECT)                                       \
 851              fprintf (FILE, "\t.lazy_reference ");                      \
 852            else                                                         \
 853              fprintf (FILE, "\t.reference ");                           \
 854            assemble_name (FILE, NAME);                                  \
 855            fprintf (FILE, "\n");                                        \
 856          }                                                              \
 857        } while (0)
 858
 859 #define ASM_DECLARE_CLASS_REFERENCE(FILE,NAME)                          \
 860     do {                                                                \
 861          if (FILE) {                                                    \
 862            fprintf (FILE, "\t");                                        \
 863            assemble_name (FILE, NAME);                                  \
 864            fprintf (FILE, "=0\n");                                      \
 865            (*targetm.asm_out.globalize_label) (FILE, NAME);             \
 866          }                                                              \
 867        } while (0)
 868
 869 /* Globalizing directive for a label.  */
 870 #define GLOBAL_ASM_OP ".globl "
 871 #define TARGET_ASM_GLOBALIZE_LABEL darwin_globalize_label
 872
 873 /* Emit an assembler directive to set visibility for a symbol.  Used
 874    to support visibility attribute and Darwin's private extern
 875    feature.  */
 876 #undef TARGET_ASM_ASSEMBLE_VISIBILITY
 877 #define TARGET_ASM_ASSEMBLE_VISIBILITY darwin_assemble_visibility
 878
 879 /* Extra attributes for Darwin.  */
 880 #define SUBTARGET_ATTRIBUTE_TABLE                                            \
 881   /* { name, min_len, max_len, decl_req, type_req, fn_type_req, handler } */ \
 882   { "weak_import", 0, 0, true, false, false,                                 \
 883     darwin_handle_weak_import_attribute }
 884
 885 #undef ASM_GENERATE_INTERNAL_LABEL
 886 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM)   \
 887   sprintf (LABEL, "*%s%ld", PREFIX, (long)(NUM))
 888
 889 #undef TARGET_ASM_MARK_DECL_PRESERVED
 890 #define TARGET_ASM_MARK_DECL_PRESERVED darwin_mark_decl_preserved
 891
 892 /* Set on a symbol with SYMBOL_FLAG_FUNCTION or
 893    MACHO_SYMBOL_FLAG_VARIABLE to indicate that the function or
 894    variable has been defined in this translation unit.  */
 895
 896 #define MACHO_SYMBOL_FLAG_VARIABLE (SYMBOL_FLAG_MACH_DEP)
 897 #define MACHO_SYMBOL_FLAG_DEFINED ((SYMBOL_FLAG_MACH_DEP) << 1)
 898
 899 /* Set on a symbol to indicate when fix-and-continue style code
 900    generation is being used and the symbol refers to a static symbol
 901    that should be rebound from new instances of a translation unit to
 902    the original instance of the data.  */
 903
 904 #define MACHO_SYMBOL_STATIC ((SYMBOL_FLAG_MACH_DEP) << 2)
 905
 906 /* Symbolic names for various things we might know about a symbol.  */
 907
 908 enum machopic_addr_class {
 909   MACHOPIC_UNDEFINED,
 910   MACHOPIC_DEFINED_DATA,
 911   MACHOPIC_UNDEFINED_DATA,
 912   MACHOPIC_DEFINED_FUNCTION,
 913   MACHOPIC_UNDEFINED_FUNCTION
 914 };
 915
 916 /* Macros defining the various PIC cases.  */
 917
 918 #define MACHO_DYNAMIC_NO_PIC_P  (TARGET_DYNAMIC_NO_PIC)
 919 #define MACHOPIC_INDIRECT       (flag_pic || MACHO_DYNAMIC_NO_PIC_P)
 920 #define MACHOPIC_JUST_INDIRECT  (flag_pic == 1 || MACHO_DYNAMIC_NO_PIC_P)
 921 #define MACHOPIC_PURE           (flag_pic == 2 && ! MACHO_DYNAMIC_NO_PIC_P)
 922
 923 #undef TARGET_ENCODE_SECTION_INFO
 924 #define TARGET_ENCODE_SECTION_INFO  darwin_encode_section_info
 925 #undef TARGET_STRIP_NAME_ENCODING
 926 #define TARGET_STRIP_NAME_ENCODING  default_strip_name_encoding
 927
 928 #define GEN_BINDER_NAME_FOR_STUB(BUF,STUB,STUB_LENGTH)          \
 929   do {                                                          \
 930     const char *const stub_ = (STUB);                           \
 931     char *buffer_ = (BUF);                                      \
 932     strcpy (buffer_, stub_);                                    \
 933     if (stub_[0] == '"')                                        \
 934       {                                                         \
 935         strcpy (buffer_ + (STUB_LENGTH) - 1, "_binder\"");      \
 936       }                                                         \
 937     else                                                        \
 938       {                                                         \
 939         strcpy (buffer_ + (STUB_LENGTH), "_binder");            \
 940       }                                                         \
 941   } while (0)
 942
 943 #define GEN_SYMBOL_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH)    \
 944   do {                                                          \
 945     const char *const symbol_ = (SYMBOL);                       \
 946     char *buffer_ = (BUF);                                      \
 947     if (name_needs_quotes (symbol_) && symbol_[0] != '"')       \
 948       {                                                         \
 949           sprintf (buffer_, "\"%s\"", symbol_);                 \
 950       }                                                         \
 951     else                                                        \
 952       {                                                         \
 953         strcpy (buffer_, symbol_);                              \
 954       }                                                         \
 955   } while (0)
 956
 957 /* Given a symbol name string, create the lazy pointer version
 958    of the symbol name.  */
 959
 960 #define GEN_LAZY_PTR_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH)  \
 961   do {                                                          \
 962     const char *symbol_ = (SYMBOL);                             \
 963     char *buffer_ = (BUF);                                      \
 964     if (symbol_[0] == '"')                                      \
 965       {                                                         \
 966         strcpy (buffer_, "\"L");                                \
 967         strcpy (buffer_ + 2, symbol_ + 1);                      \
 968         strcpy (buffer_ + (SYMBOL_LENGTH), "$lazy_ptr\"");      \
 969       }                                                         \
 970     else if (name_needs_quotes (symbol_))                       \
 971       {                                                         \
 972         strcpy (buffer_, "\"L");                                \
 973         strcpy (buffer_ + 2, symbol_);                          \
 974         strcpy (buffer_ + (SYMBOL_LENGTH) + 2, "$lazy_ptr\"");  \
 975       }                                                         \
 976     else                                                        \
 977       {                                                         \
 978         strcpy (buffer_, "L");                                  \
 979         strcpy (buffer_ + 1, symbol_);                          \
 980         strcpy (buffer_ + (SYMBOL_LENGTH) + 1, "$lazy_ptr");    \
 981       }                                                         \
 982   } while (0)
 983
 984 #define TARGET_ASM_EXCEPTION_SECTION darwin_exception_section
 985
 986 #define TARGET_ASM_EH_FRAME_SECTION darwin_eh_frame_section
 987
 988 #define EH_FRAME_SECTION_NAME   "__TEXT"
 989 #define EH_FRAME_SECTION_ATTR ",coalesced,no_toc+strip_static_syms+live_support"
 990
 991 /* Java runtime class list.  */
 992 #define JCR_SECTION_NAME "__DATA,jcr,regular,no_dead_strip"
 993
 994 #undef ASM_PREFERRED_EH_DATA_FORMAT
 995 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL)  \
 996   (((CODE) == 2 && (GLOBAL) == 1) \
 997    ? (DW_EH_PE_pcrel | DW_EH_PE_indirect | DW_EH_PE_sdata4) : \
 998      ((CODE) == 1 || (GLOBAL) == 0) ? DW_EH_PE_pcrel : DW_EH_PE_absptr)
 999
1000 #define ASM_OUTPUT_DWARF_DELTA(FILE,SIZE,LABEL1,LABEL2)  \
1001   darwin_asm_output_dwarf_delta (FILE, SIZE, LABEL1, LABEL2)
1002
1003 #define ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX(ASM_OUT_FILE, ENCODING, SIZE, ADDR, DONE)     \
1004       if (ENCODING == ASM_PREFERRED_EH_DATA_FORMAT (2, 1)) {                            \
1005         darwin_non_lazy_pcrel (ASM_OUT_FILE, ADDR);                                     \
1006         goto DONE;                                                                      \
1007       }
1008
1009 /* Experimentally, putting jump tables in text is faster on SPEC.
1010    Also this is needed for correctness for coalesced functions.  */
1011
1012 #ifndef JUMP_TABLES_IN_TEXT_SECTION
1013 #define JUMP_TABLES_IN_TEXT_SECTION 1
1014 #endif
1015
1016 #define TARGET_TERMINATE_DW2_EH_FRAME_INFO false
1017
1018 #undef TARGET_ASM_NAMED_SECTION
1019 #define TARGET_ASM_NAMED_SECTION darwin_asm_named_section
1020
1021 #define DARWIN_REGISTER_TARGET_PRAGMAS()                        \
1022   do {                                                          \
1023     c_register_pragma (0, "mark", darwin_pragma_ignore);        \
1024     c_register_pragma (0, "options", darwin_pragma_options);    \
1025     c_register_pragma (0, "segment", darwin_pragma_ignore);     \
1026     c_register_pragma (0, "unused", darwin_pragma_unused);      \
1027   } while (0)
1028
1029 #undef ASM_APP_ON
1030 #define ASM_APP_ON ""
1031 #undef ASM_APP_OFF
1032 #define ASM_APP_OFF ""
1033
1034 void darwin_register_frameworks (const char *, const char *, int);
1035 void darwin_register_objc_includes (const char *, const char *, int);
1036 #define TARGET_EXTRA_PRE_INCLUDES darwin_register_objc_includes
1037 #define TARGET_EXTRA_INCLUDES darwin_register_frameworks
1038
1039 void add_framework_path (char *);
1040 #define TARGET_OPTF add_framework_path
1041
1042 #define TARGET_HAS_F_SETLKW
1043
1044 /* Darwin before 7.0 does not have C99 functions.   */
1045 #ifndef TARGET_C99_FUNCTIONS
1046 #define TARGET_C99_FUNCTIONS 0
1047 #endif
1048
1049 #define WINT_TYPE "int"
1050
1051 #endif /* CONFIG_DARWIN_H */