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 /* These compiler options take n arguments.  */
 144
 145 #undef  WORD_SWITCH_TAKES_ARG
 146 #define WORD_SWITCH_TAKES_ARG(STR)              \
 147   (DEFAULT_WORD_SWITCH_TAKES_ARG (STR) ? 1 :    \
 148    !strcmp (STR, "Zallowable_client") ? 1 :     \
 149    !strcmp (STR, "arch") ? 1 :                  \
 150    !strcmp (STR, "arch_only") ? 1 :             \
 151    !strcmp (STR, "Zbundle_loader") ? 1 :        \
 152    !strcmp (STR, "client_name") ? 1 :           \
 153    !strcmp (STR, "compatibility_version") ? 1 : \
 154    !strcmp (STR, "current_version") ? 1 :       \
 155    !strcmp (STR, "Zdylib_file") ? 1 :           \
 156    !strcmp (STR, "Zexported_symbols_list") ? 1 : \
 157    !strcmp (STR, "Zimage_base") ? 1 :           \
 158    !strcmp (STR, "Zinit") ? 1 :                 \
 159    !strcmp (STR, "Zinstall_name") ? 1 :         \
 160    !strcmp (STR, "Zmultiplydefinedunused") ? 1 : \
 161    !strcmp (STR, "Zmultiply_defined") ? 1 :     \
 162    !strcmp (STR, "precomp-trustfile") ? 1 :     \
 163    !strcmp (STR, "read_only_relocs") ? 1 :      \
 164    !strcmp (STR, "sectcreate") ? 3 :            \
 165    !strcmp (STR, "sectorder") ? 3 :             \
 166    !strcmp (STR, "Zsegaddr") ? 2 :              \
 167    !strcmp (STR, "Zsegs_read_only_addr") ? 1 :  \
 168    !strcmp (STR, "Zsegs_read_write_addr") ? 1 : \
 169    !strcmp (STR, "Zseg_addr_table") ? 1 :       \
 170    !strcmp (STR, "Zseg_addr_table_filename") ?1 :\
 171    !strcmp (STR, "seg1addr") ? 1 :              \
 172    !strcmp (STR, "segprot") ? 3 :               \
 173    !strcmp (STR, "sub_library") ? 1 :           \
 174    !strcmp (STR, "sub_umbrella") ? 1 :          \
 175    !strcmp (STR, "umbrella") ? 1 :              \
 176    !strcmp (STR, "undefined") ? 1 :             \
 177    !strcmp (STR, "Zunexported_symbols_list") ? 1 : \
 178    !strcmp (STR, "Zweak_reference_mismatches") ? 1 : \
 179    !strcmp (STR, "pagezero_size") ? 1 :         \
 180    !strcmp (STR, "segs_read_only_addr") ? 1 :   \
 181    !strcmp (STR, "segs_read_write_addr") ? 1 :  \
 182    !strcmp (STR, "sectalign") ? 3 :             \
 183    !strcmp (STR, "sectobjectsymbols") ? 2 :     \
 184    !strcmp (STR, "segcreate") ? 3 :             \
 185    !strcmp (STR, "dylinker_install_name") ? 1 : \
 186    0)
 187
 188 /* Machine dependent cpp options.  __APPLE_CC__ is defined as the
 189    Apple include files expect it to be defined and won't work if it
 190    isn't.  */
 191
 192 #undef  CPP_SPEC
 193 #define CPP_SPEC "%{static:%{!dynamic:-D__STATIC__}}%{!static:-D__DYNAMIC__}\
 194     -D__APPLE_CC__=1"
 195
 196 /* This is mostly a clone of the standard LINK_COMMAND_SPEC, plus
 197    precomp, libtool, and fat build additions.  Also we
 198    don't specify a second %G after %L because libSystem is
 199    self-contained and doesn't need to link against libgcc.a.  */
 200 /* In general, random Darwin linker flags should go into LINK_SPEC
 201    instead of LINK_COMMAND_SPEC.  The command spec is better for
 202    specifying the handling of options understood by generic Unix
 203    linkers, and for positional arguments like libraries.  */
 204 #define LINK_COMMAND_SPEC "\
 205 %{!fdump=*:%{!fsyntax-only:%{!precomp:%{!c:%{!M:%{!MM:%{!E:%{!S:\
 206     %{!Zdynamiclib:%(linker)}%{Zdynamiclib:/usr/bin/libtool} \
 207     %l %X %{d} %{s} %{t} %{Z} \
 208     %{!Zdynamiclib:%{A} %{e*} %{m} %{N} %{n} %{r} %{u*} %{x} %{z}} \
 209     %{@:-o %f%u.out}%{!@:%{o*}%{!o:-o a.out}} \
 210     %{!Zdynamiclib:%{!A:%{!nostdlib:%{!nostartfiles:%S}}}} \
 211     %{L*} %(link_libgcc) %o %{fprofile-arcs|fprofile-generate|coverage:-lgcov} \
 212     %{!nostdlib:%{!nodefaultlibs:%G %L}} \
 213     %{!A:%{!nostdlib:%{!nostartfiles:%E}}} %{T*} %{F*} }}}}}}}}"
 214
 215 /* Please keep the random linker options in alphabetical order (modulo
 216    'Z' and 'no' prefixes).  Options that can only go to one of libtool
 217    or ld must be listed twice, under both !Zdynamiclib and
 218    Zdynamiclib, with one of the cases reporting an error.  */
 219 /* Note that options taking arguments may appear multiple times on a
 220    command line with different arguments each time, so put a * after
 221    their names so all of them get passed.  */
 222 #define LINK_SPEC  \
 223   "%{static}%{!static:-dynamic} \
 224    %{fgnu-runtime:%:replace-outfile(-lobjc -lobjc-gnu)}\
 225    %{!Zdynamiclib: \
 226      %{Zforce_cpusubtype_ALL:-arch %(darwin_arch) -force_cpusubtype_ALL} \
 227      %{!Zforce_cpusubtype_ALL:-arch %(darwin_subarch)} \
 228      %{Zbundle:-bundle} \
 229      %{Zbundle_loader*:-bundle_loader %*} \
 230      %{client_name*} \
 231      %{compatibility_version*:%e-compatibility_version only allowed with -dynamiclib\
 232 } \
 233      %{current_version*:%e-current_version only allowed with -dynamiclib} \
 234      %{Zforce_flat_namespace:-force_flat_namespace} \
 235      %{Zinstall_name*:%e-install_name only allowed with -dynamiclib} \
 236      %{keep_private_externs} \
 237      %{private_bundle} \
 238     } \
 239    %{Zdynamiclib: \
 240      %{Zbundle:%e-bundle not allowed with -dynamiclib} \
 241      %{Zbundle_loader*:%e-bundle_loader not allowed with -dynamiclib} \
 242      %{client_name*:%e-client_name not allowed with -dynamiclib} \
 243      %{compatibility_version*} \
 244      %{current_version*} \
 245      %{Zforce_cpusubtype_ALL:-arch_only %(darwin_arch)} \
 246      %{!Zforce_cpusubtype_ALL: -arch_only %(darwin_subarch)} \
 247      %{Zforce_flat_namespace:%e-force_flat_namespace not allowed with -dynamiclib} \
 248      %{Zinstall_name*:-install_name %*} \
 249      %{keep_private_externs:%e-keep_private_externs not allowed with -dynamiclib} \
 250      %{private_bundle:%e-private_bundle not allowed with -dynamiclib} \
 251     } \
 252    %{Zall_load:-all_load}%{Zdynamiclib:%{!Zall_load:-noall_load}} \
 253    %{Zallowable_client*:-allowable_client %*} \
 254    %{Zbind_at_load:-bind_at_load} \
 255    %{Zarch_errors_fatal:-arch_errors_fatal} \
 256    %{Zdead_strip:-dead_strip} \
 257    %{Zno_dead_strip_inits_and_terms:-no_dead_strip_inits_and_terms} \
 258    %{Zdylib_file*:-dylib_file %*} \
 259    %{Zdynamic:-dynamic}\
 260    %{Zexported_symbols_list*:-exported_symbols_list %*} \
 261    %{Zflat_namespace:-flat_namespace} \
 262    %{headerpad_max_install_names*} \
 263    %{Zimage_base*:-image_base %*} \
 264    %{Zinit*:-init %*} \
 265    %{nomultidefs} \
 266    %{Zmulti_module:-multi_module} %{Zsingle_module:-single_module} \
 267    %{Zmultiply_defined*:-multiply_defined %*} \
 268    %{Zmultiplydefinedunused*:-multiply_defined_unused %*} \
 269    %{prebind} %{noprebind} %{nofixprebinding} %{prebind_all_twolevel_modules} \
 270    %{read_only_relocs} \
 271    %{sectcreate*} %{sectorder*} %{seg1addr*} %{segprot*} \
 272    %{Zsegaddr*:-segaddr %*} \
 273    %{Zsegs_read_only_addr*:-segs_read_only_addr %*} \
 274    %{Zsegs_read_write_addr*:-segs_read_write_addr %*} \
 275    %{Zseg_addr_table*: -seg_addr_table %*} \
 276    %{Zseg_addr_table_filename*:-seg_addr_table_filename %*} \
 277    %{sub_library*} %{sub_umbrella*} \
 278    %{isysroot*:-syslibroot %*} \
 279    %{twolevel_namespace} %{twolevel_namespace_hints} \
 280    %{umbrella*} \
 281    %{undefined*} \
 282    %{Zunexported_symbols_list*:-unexported_symbols_list %*} \
 283    %{Zweak_reference_mismatches*:-weak_reference_mismatches %*} \
 284    %{!Zweak_reference_mismatches*:-weak_reference_mismatches non-weak} \
 285    %{X} \
 286    %{y*} \
 287    %{w} \
 288    %{pagezero_size*} %{segs_read_*} %{seglinkedit} %{noseglinkedit}  \
 289    %{sectalign*} %{sectobjectsymbols*} %{segcreate*} %{whyload} \
 290    %{whatsloaded} %{dylinker_install_name*} \
 291    %{dylinker} %{Mach} "
 292
 293
 294 /* Machine dependent libraries but do not redefine it if we already on 7.0 and
 295    above as it needs to link with libmx also.  */
 296
 297 #ifndef LIB_SPEC
 298 #define LIB_SPEC "%{!static:-lSystem}"
 299 #endif
 300
 301 /* -dynamiclib implies -shared-libgcc just like -shared would on linux.  */
 302 #define REAL_LIBGCC_SPEC \
 303    "%{static|static-libgcc:-lgcc -lgcc_eh}\
 304     %{!static:%{!static-libgcc:\
 305       %{!Zdynamiclib:%{!shared-libgcc:-lgcc -lgcc_eh}\
 306       %{shared-libgcc:-lgcc_s -lgcc}} %{Zdynamiclib:-lgcc_s -lgcc}}}"
 307
 308 /* We specify crt0.o as -lcrt0.o so that ld will search the library path.  */
 309 /* We don't want anything to do with crt2.o in the 64-bit case;
 310    testing the PowerPC-specific -m64 flag here is a little irregular,
 311    but it's overkill to make copies of this spec for each target
 312    arch.  */
 313
 314 #undef  STARTFILE_SPEC
 315 #define STARTFILE_SPEC  \
 316   "%{!Zdynamiclib:%{Zbundle:%{!static:-lbundle1.o}} \
 317      %{!Zbundle:%{pg:%{static:-lgcrt0.o} \
 318                      %{!static:%{object:-lgcrt0.o} \
 319                                %{!object:%{preload:-lgcrt0.o} \
 320                                  %{!preload:-lgcrt1.o %{!m64: crt2.o%s}}}}} \
 321                 %{!pg:%{static:-lcrt0.o} \
 322                       %{!static:%{object:-lcrt0.o} \
 323                                 %{!object:%{preload:-lcrt0.o} \
 324                                   %{!preload:-lcrt1.o %{!m64: crt2.o%s}}}}}}}"
 325
 326 /* The native Darwin linker doesn't necessarily place files in the order
 327    that they're specified on the link line.  Thus, it is pointless
 328    to put anything in ENDFILE_SPEC.  */
 329 /* #define ENDFILE_SPEC "" */
 330
 331 /* Default Darwin ASM_SPEC, very simple.  */
 332 #define ASM_SPEC "-arch %(darwin_arch) \
 333   %{Zforce_cpusubtype_ALL:-force_cpusubtype_ALL}"
 334
 335 /* We use Dbx symbol format.  */
 336
 337 #define DBX_DEBUGGING_INFO 1
 338
 339 /* Also enable Dwarf 2 as an option.  */
 340 #define DWARF2_DEBUGGING_INFO
 341 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
 342
 343 #define DEBUG_FRAME_SECTION   "__DWARFA,__debug_frame,coalesced,no_toc+strip_static_syms"
 344 #define DEBUG_INFO_SECTION    "__DWARFA,__debug_info"
 345 #define DEBUG_ABBREV_SECTION  "__DWARFA,__debug_abbrev"
 346 #define DEBUG_ARANGES_SECTION "__DWARFA,__debug_aranges"
 347 #define DEBUG_MACINFO_SECTION "__DWARFA,__debug_macinfo"
 348 #define DEBUG_LINE_SECTION    "__DWARFA,__debug_line"
 349 #define DEBUG_LOC_SECTION     "__DWARFA,__debug_loc"
 350 #define DEBUG_PUBNAMES_SECTION        "__DWARFA,__debug_pubnames"
 351 #define DEBUG_STR_SECTION     "__DWARFA,__debug_str"
 352 #define DEBUG_RANGES_SECTION  "__DWARFA,__debug_ranges"
 353
 354 /* When generating stabs debugging, use N_BINCL entries.  */
 355
 356 #define DBX_USE_BINCL
 357
 358 /* There is no limit to the length of stabs strings.  */
 359
 360 #define DBX_CONTIN_LENGTH 0
 361
 362 /* gdb needs a null N_SO at the end of each file for scattered loading.  */
 363
 364 #define DBX_OUTPUT_NULL_N_SO_AT_MAIN_SOURCE_FILE_END
 365
 366 /* GCC's definition of 'one_only' is the same as its definition of 'weak'.  */
 367 #define MAKE_DECL_ONE_ONLY(DECL) (DECL_WEAK (DECL) = 1)
 368
 369 /* Mach-O supports 'weak imports', and 'weak definitions' in coalesced
 370    sections.  machopic_select_section ensures that weak variables go in
 371    coalesced sections.  Weak aliases (or any other kind of aliases) are
 372    not supported.  Weak symbols that aren't visible outside the .s file
 373    are not supported.  */
 374 #define ASM_WEAKEN_DECL(FILE, DECL, NAME, ALIAS)                        \
 375   do {                                                                  \
 376     if (ALIAS)                                                          \
 377       {                                                                 \
 378         warning (0, "alias definitions not supported in Mach-O; ignored");      \
 379         break;                                                          \
 380       }                                                                 \
 381                                                                         \
 382     if (! DECL_EXTERNAL (DECL) && TREE_PUBLIC (DECL))                   \
 383       targetm.asm_out.globalize_label (FILE, NAME);                     \
 384     if (DECL_EXTERNAL (DECL))                                           \
 385       fputs ("\t.weak_reference ", FILE);                               \
 386     else if (! lookup_attribute ("weak", DECL_ATTRIBUTES (DECL))        \
 387         && lookup_attribute ("weak_import", DECL_ATTRIBUTES (DECL)))    \
 388       break;                                                            \
 389     else if (TREE_PUBLIC (DECL))                                        \
 390       fputs ("\t.weak_definition ", FILE);                              \
 391     else                                                                \
 392       break;                                                            \
 393     assemble_name (FILE, NAME);                                         \
 394     fputc ('\n', FILE);                                                 \
 395   } while (0)
 396
 397 /* Darwin has the pthread routines in libSystem, which every program
 398    links to, so there's no need for weak-ness for that.  */
 399 #define GTHREAD_USE_WEAK 0
 400
 401 /* The Darwin linker imposes two limitations on common symbols: they
 402    can't have hidden visibility, and they can't appear in dylibs.  As
 403    a consequence, we should never use common symbols to represent
 404    vague linkage. */
 405 #undef USE_COMMON_FOR_ONE_ONLY
 406 #define USE_COMMON_FOR_ONE_ONLY 0
 407
 408 /* The Darwin linker doesn't want coalesced symbols to appear in
 409    a static archive's table of contents. */
 410 #undef TARGET_WEAK_NOT_IN_ARCHIVE_TOC
 411 #define TARGET_WEAK_NOT_IN_ARCHIVE_TOC 1
 412
 413 /* We make exception information linkonce. */
 414 #undef TARGET_USES_WEAK_UNWIND_INFO
 415 #define TARGET_USES_WEAK_UNWIND_INFO 1
 416
 417 /* We need to use a nonlocal label for the start of an EH frame: the
 418    Darwin linker requires that a coalesced section start with a label. */
 419 #undef FRAME_BEGIN_LABEL
 420 #define FRAME_BEGIN_LABEL "EH_frame"
 421
 422 /* Emit a label for the FDE corresponding to DECL.  EMPTY means
 423    emit a label for an empty FDE. */
 424 #define TARGET_ASM_EMIT_UNWIND_LABEL darwin_emit_unwind_label
 425
 426 /* Our profiling scheme doesn't LP labels and counter words.  */
 427
 428 #define NO_PROFILE_COUNTERS     1
 429
 430 #undef  INIT_SECTION_ASM_OP
 431 #define INIT_SECTION_ASM_OP
 432
 433 #undef  INVOKE__main
 434
 435 #define TARGET_ASM_CONSTRUCTOR  machopic_asm_out_constructor
 436 #define TARGET_ASM_DESTRUCTOR   machopic_asm_out_destructor
 437
 438 /* Always prefix with an underscore.  */
 439
 440 #define USER_LABEL_PREFIX "_"
 441
 442 /* Don't output a .file directive.  That is only used by the assembler for
 443    error reporting.  */
 444 #undef  TARGET_ASM_FILE_START_FILE_DIRECTIVE
 445 #define TARGET_ASM_FILE_START_FILE_DIRECTIVE false
 446
 447 #undef  TARGET_ASM_FILE_END
 448 #define TARGET_ASM_FILE_END darwin_file_end
 449
 450 #define ASM_OUTPUT_SKIP(FILE,SIZE)  \
 451   fprintf (FILE, "\t.space "HOST_WIDE_INT_PRINT_UNSIGNED"\n", SIZE)
 452
 453 /* Give ObjC methods pretty symbol names.  */
 454
 455 #undef  OBJC_GEN_METHOD_LABEL
 456 #define OBJC_GEN_METHOD_LABEL(BUF,IS_INST,CLASS_NAME,CAT_NAME,SEL_NAME,NUM) \
 457   do { if (CAT_NAME)                                                    \
 458          sprintf (BUF, "%c[%s(%s) %s]", (IS_INST) ? '-' : '+',          \
 459                   (CLASS_NAME), (CAT_NAME), (SEL_NAME));                \
 460        else                                                             \
 461          sprintf (BUF, "%c[%s %s]", (IS_INST) ? '-' : '+',              \
 462                   (CLASS_NAME), (SEL_NAME));                            \
 463      } while (0)
 464
 465 /* The RTTI data (e.g., __ti4name) is common and public (and static),
 466    but it does need to be referenced via indirect PIC data pointers.
 467    The machopic_define_symbol calls are telling the machopic subsystem
 468    that the name *is* defined in this module, so it doesn't need to
 469    make them indirect.  */
 470
 471 #undef ASM_DECLARE_OBJECT_NAME
 472 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL)                       \
 473   do {                                                                  \
 474     const char *xname = NAME;                                           \
 475     if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF)             \
 476       xname = IDENTIFIER_POINTER (DECL_NAME (DECL));                    \
 477     if (! DECL_WEAK (DECL)                                              \
 478         && ((TREE_STATIC (DECL)                                         \
 479              && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))           \
 480             || DECL_INITIAL (DECL)))                                    \
 481         machopic_define_symbol (DECL_RTL (DECL));                       \
 482     if ((TREE_STATIC (DECL)                                             \
 483          && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))               \
 484         || DECL_INITIAL (DECL))                                         \
 485       (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false);   \
 486     ASM_OUTPUT_LABEL (FILE, xname);                                     \
 487     /* Darwin doesn't support zero-size objects, so give them a         \
 488        byte.  */                                                        \
 489     if (tree_low_cst (DECL_SIZE_UNIT (DECL), 1) == 0)                   \
 490       assemble_zeros (1);                                               \
 491   } while (0)
 492
 493 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL)                     \
 494   do {                                                                  \
 495     const char *xname = NAME;                                           \
 496     if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF)             \
 497       xname = IDENTIFIER_POINTER (DECL_NAME (DECL));                    \
 498     if (! DECL_WEAK (DECL)                                              \
 499         && ((TREE_STATIC (DECL)                                         \
 500              && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))           \
 501             || DECL_INITIAL (DECL)))                                    \
 502         machopic_define_symbol (DECL_RTL (DECL));                       \
 503     if ((TREE_STATIC (DECL)                                             \
 504          && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))               \
 505         || DECL_INITIAL (DECL))                                         \
 506       (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false);   \
 507     ASM_OUTPUT_LABEL (FILE, xname);                                     \
 508   } while (0)
 509
 510 #define ASM_DECLARE_CONSTANT_NAME(FILE, NAME, EXP, SIZE)        \
 511   do {                                                          \
 512     ASM_OUTPUT_LABEL (FILE, NAME);                              \
 513     /* Darwin doesn't support zero-size objects, so give them a \
 514        byte.  */                                                \
 515     if ((SIZE) == 0)                                            \
 516       assemble_zeros (1);                                       \
 517   } while (0)
 518
 519 /* Wrap new method names in quotes so the assembler doesn't gag.
 520    Make Objective-C internal symbols local.  */
 521
 522 #undef  ASM_OUTPUT_LABELREF
 523 #define ASM_OUTPUT_LABELREF(FILE,NAME)                                       \
 524   do {                                                                       \
 525        const char *xname = (NAME);                                           \
 526        if (! strcmp (xname, "<pic base>"))                                   \
 527          machopic_output_function_base_name(FILE);                           \
 528        else if (xname[0] == '&' || xname[0] == '*')                          \
 529          {                                                                   \
 530            int len = strlen (xname);                                         \
 531            if (len > 6 && !strcmp ("$stub", xname + len - 5))                \
 532              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 533            else if (len > 7 && !strcmp ("$stub\"", xname + len - 6))         \
 534              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 535            else if (len > 14 && !strcmp ("$non_lazy_ptr", xname + len - 13)) \
 536              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 537            else if (len > 15 && !strcmp ("$non_lazy_ptr\"", xname + len - 14)) \
 538              machopic_validate_stub_or_non_lazy_ptr (xname);                 \
 539            if (xname[1] != '"' && name_needs_quotes (&xname[1]))             \
 540              fprintf (FILE, "\"%s\"", &xname[1]);                            \
 541            else                                                              \
 542              fputs (&xname[1], FILE);                                        \
 543          }                                                                   \
 544        else if (xname[0] == '+' || xname[0] == '-')                          \
 545          fprintf (FILE, "\"%s\"", xname);                                    \
 546        else if (!strncmp (xname, "_OBJC_", 6))                               \
 547          fprintf (FILE, "L%s", xname);                                       \
 548        else if (!strncmp (xname, ".objc_class_name_", 17))                   \
 549          fprintf (FILE, "%s", xname);                                        \
 550        else if (xname[0] != '"' && name_needs_quotes (xname))                \
 551          fprintf (FILE, "\"%s\"", xname);                                    \
 552        else                                                                  \
 553          asm_fprintf (FILE, "%U%s", xname);                                  \
 554   } while (0)
 555
 556 /* Output before executable code.  */
 557 #undef TEXT_SECTION_ASM_OP
 558 #define TEXT_SECTION_ASM_OP "\t.text"
 559
 560 /* Output before writable data.  */
 561
 562 #undef DATA_SECTION_ASM_OP
 563 #define DATA_SECTION_ASM_OP "\t.data"
 564
 565 #undef  ALIGN_ASM_OP
 566 #define ALIGN_ASM_OP            ".align"
 567
 568 #undef  ASM_OUTPUT_ALIGN
 569 #define ASM_OUTPUT_ALIGN(FILE,LOG)      \
 570   if ((LOG) != 0)                       \
 571     fprintf (FILE, "\t%s %d\n", ALIGN_ASM_OP, (LOG))
 572
 573 /* Ensure correct alignment of bss data.  */
 574
 575 #undef  ASM_OUTPUT_ALIGNED_DECL_LOCAL
 576 #define ASM_OUTPUT_ALIGNED_DECL_LOCAL(FILE, DECL, NAME, SIZE, ALIGN)    \
 577   do {                                                                  \
 578     unsigned HOST_WIDE_INT _new_size = SIZE;                            \
 579     fputs (".lcomm ", (FILE));                                          \
 580     assemble_name ((FILE), (NAME));                                     \
 581     if (_new_size == 0) _new_size = 1;                                  \
 582     fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED",%u\n", _new_size, \
 583              floor_log2 ((ALIGN) / BITS_PER_UNIT));                     \
 584     if ((DECL) && ((TREE_STATIC (DECL)                                  \
 585          && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))               \
 586         || DECL_INITIAL (DECL)))                                        \
 587       {                                                                 \
 588         (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false); \
 589         machopic_define_symbol (DECL_RTL (DECL));                       \
 590       }                                                                 \
 591   } while (0)
 592
 593 /* The maximum alignment which the object file format can support.
 594    For Mach-O, this is 2^15.  */
 595
 596 #undef  MAX_OFILE_ALIGNMENT
 597 #define MAX_OFILE_ALIGNMENT 0x8000
 598
 599 /* Create new Mach-O sections.  */
 600
 601 #undef  SECTION_FUNCTION
 602 #define SECTION_FUNCTION(FUNCTION, SECTION, DIRECTIVE, OBJC)            \
 603 extern void FUNCTION (void);                                            \
 604 void                                                                    \
 605 FUNCTION (void)                                                         \
 606 {                                                                       \
 607   if (in_section != SECTION)                                            \
 608     {                                                                   \
 609       if (OBJC)                                                         \
 610         objc_section_init ();                                           \
 611       if (asm_out_file)                                                 \
 612         fputs ("\t" DIRECTIVE "\n", asm_out_file);                      \
 613       in_section = SECTION;                                             \
 614       if ((SECTION == in_text_coal)                                     \
 615           || (SECTION == in_text_unlikely)                              \
 616           || (SECTION == in_text_unlikely_coal))                        \
 617         last_text_section = SECTION;                                    \
 618     }                                                                   \
 619 }                                                                       \
 620
 621 /* Darwin uses many types of special sections.  */
 622
 623 #undef  EXTRA_SECTIONS
 624 #define EXTRA_SECTIONS                                                  \
 625   in_text_coal, in_text_unlikely, in_text_unlikely_coal,                \
 626   in_const, in_const_data, in_cstring, in_literal4, in_literal8,        \
 627   in_const_coal, in_const_data_coal, in_data_coal,                      \
 628   in_constructor, in_destructor, in_mod_init, in_mod_term,              \
 629   in_objc_class, in_objc_meta_class, in_objc_category,                  \
 630   in_objc_class_vars, in_objc_instance_vars,                            \
 631   in_objc_cls_meth, in_objc_inst_meth,                                  \
 632   in_objc_cat_cls_meth, in_objc_cat_inst_meth,                          \
 633   in_objc_selector_refs,                                                \
 634   in_objc_selector_fixup,                                               \
 635   in_objc_symbols, in_objc_module_info,                                 \
 636   in_objc_protocol, in_objc_string_object,                              \
 637   in_objc_constant_string_object,                                       \
 638   in_objc_image_info,                                                   \
 639   in_objc_class_names, in_objc_meth_var_names,                          \
 640   in_objc_meth_var_types, in_objc_cls_refs,                             \
 641   in_machopic_nl_symbol_ptr,                                            \
 642   in_machopic_lazy_symbol_ptr,                                          \
 643   in_machopic_symbol_stub,                                              \
 644   in_machopic_symbol_stub1,                                             \
 645   in_machopic_picsymbol_stub,                                           \
 646   in_machopic_picsymbol_stub1,                                          \
 647   in_darwin_exception, in_darwin_eh_frame,                              \
 648   num_sections
 649
 650 #undef  EXTRA_SECTION_FUNCTIONS
 651 #define EXTRA_SECTION_FUNCTIONS                                 \
 652 static void objc_section_init (void);                           \
 653 SECTION_FUNCTION (text_coal_section,                            \
 654                   in_text_coal,                                 \
 655                   ".section __TEXT,__textcoal_nt,coalesced,"    \
 656                     "pure_instructions", 0)                     \
 657 SECTION_FUNCTION (text_unlikely_coal_section,                   \
 658                   in_text_unlikely_coal,                        \
 659                   ".section __TEXT,__text_unlikely_coal,"       \
 660                     "coalesced,pure_instructions", 0)           \
 661 SECTION_FUNCTION (const_section,                                \
 662                   in_const,                                     \
 663                   ".const", 0)                                  \
 664 SECTION_FUNCTION (const_coal_section,                           \
 665                   in_const_coal,                                \
 666                   ".section __TEXT,__const_coal,coalesced", 0)  \
 667 SECTION_FUNCTION (const_data_section,                           \
 668                   in_const_data,                                \
 669                   ".const_data", 0)                             \
 670 SECTION_FUNCTION (const_data_coal_section,                      \
 671                   in_const_data_coal,                           \
 672                   ".section __DATA,__const_coal,coalesced", 0)  \
 673 SECTION_FUNCTION (data_coal_section,                            \
 674                   in_data_coal,                                 \
 675                   ".section __DATA,__datacoal_nt,coalesced", 0) \
 676 SECTION_FUNCTION (cstring_section,                              \
 677                   in_cstring,                                   \
 678                   ".cstring", 0)                                \
 679 SECTION_FUNCTION (literal4_section,                             \
 680                   in_literal4,                                  \
 681                   ".literal4", 0)                               \
 682 SECTION_FUNCTION (literal8_section,                             \
 683                   in_literal8,                                  \
 684                   ".literal8", 0)                               \
 685 SECTION_FUNCTION (constructor_section,                          \
 686                   in_constructor,                               \
 687                   ".constructor", 0)                            \
 688 SECTION_FUNCTION (mod_init_section,                             \
 689                   in_mod_init,                                  \
 690                   ".mod_init_func", 0)                          \
 691 SECTION_FUNCTION (mod_term_section,                             \
 692                   in_mod_term,                                  \
 693                   ".mod_term_func", 0)                          \
 694 SECTION_FUNCTION (destructor_section,                           \
 695                   in_destructor,                                \
 696                   ".destructor", 0)                             \
 697 SECTION_FUNCTION (objc_class_section,                           \
 698                   in_objc_class,                                \
 699                   ".objc_class", 1)                             \
 700 SECTION_FUNCTION (objc_meta_class_section,                      \
 701                   in_objc_meta_class,                           \
 702                   ".objc_meta_class", 1)                        \
 703 SECTION_FUNCTION (objc_category_section,                        \
 704                   in_objc_category,                             \
 705                 ".objc_category", 1)                            \
 706 SECTION_FUNCTION (objc_class_vars_section,                      \
 707                   in_objc_class_vars,                           \
 708                   ".objc_class_vars", 1)                        \
 709 SECTION_FUNCTION (objc_instance_vars_section,                   \
 710                   in_objc_instance_vars,                        \
 711                   ".objc_instance_vars", 1)                     \
 712 SECTION_FUNCTION (objc_cls_meth_section,                        \
 713                   in_objc_cls_meth,                             \
 714                   ".objc_cls_meth", 1)                          \
 715 SECTION_FUNCTION (objc_inst_meth_section,                       \
 716                   in_objc_inst_meth,                            \
 717                   ".objc_inst_meth", 1)                         \
 718 SECTION_FUNCTION (objc_cat_cls_meth_section,                    \
 719                   in_objc_cat_cls_meth,                         \
 720                   ".objc_cat_cls_meth", 1)                      \
 721 SECTION_FUNCTION (objc_cat_inst_meth_section,                   \
 722                   in_objc_cat_inst_meth,                        \
 723                   ".objc_cat_inst_meth", 1)                     \
 724 SECTION_FUNCTION (objc_selector_refs_section,                   \
 725                   in_objc_selector_refs,                        \
 726                   ".objc_message_refs", 1)                      \
 727 SECTION_FUNCTION (objc_selector_fixup_section,                               \
 728                   in_objc_selector_fixup,                                    \
 729                   ".section __OBJC, __sel_fixup, regular, no_dead_strip", 1) \
 730 SECTION_FUNCTION (objc_symbols_section,                                 \
 731                   in_objc_symbols,                                      \
 732                   ".objc_symbols", 1)                                   \
 733 SECTION_FUNCTION (objc_module_info_section,                             \
 734                   in_objc_module_info,                                  \
 735                   ".objc_module_info", 1)                               \
 736 SECTION_FUNCTION (objc_protocol_section,                                \
 737                   in_objc_protocol,                                     \
 738                   ".objc_protocol", 1)                                  \
 739 SECTION_FUNCTION (objc_string_object_section,                           \
 740                   in_objc_string_object,                                \
 741                   ".objc_string_object", 1)                             \
 742 SECTION_FUNCTION (objc_constant_string_object_section,                  \
 743                   in_objc_constant_string_object,                       \
 744                   ".section __OBJC, __cstring_object, regular, "        \
 745                     "no_dead_strip", 1)                                 \
 746 /* Fix-and-Continue image marker.  */                                   \
 747 SECTION_FUNCTION (objc_image_info_section,                              \
 748                   in_objc_image_info,                                   \
 749                   ".section __OBJC, __image_info, regular, "            \
 750                     "no_dead_strip", 1)                                 \
 751 SECTION_FUNCTION (objc_class_names_section,                             \
 752                 in_objc_class_names,                                    \
 753                 ".objc_class_names", 1)                                 \
 754 SECTION_FUNCTION (objc_meth_var_names_section,                          \
 755                 in_objc_meth_var_names,                                 \
 756                 ".objc_meth_var_names", 1)                              \
 757 SECTION_FUNCTION (objc_meth_var_types_section,                          \
 758                 in_objc_meth_var_types,                                 \
 759                 ".objc_meth_var_types", 1)                              \
 760 SECTION_FUNCTION (objc_cls_refs_section,                                \
 761                 in_objc_cls_refs,                                       \
 762                 ".objc_cls_refs", 1)                                    \
 763 \
 764 SECTION_FUNCTION (machopic_lazy_symbol_ptr_section,                     \
 765                 in_machopic_lazy_symbol_ptr,                            \
 766                 ".lazy_symbol_pointer", 0)                              \
 767 SECTION_FUNCTION (machopic_nl_symbol_ptr_section,                       \
 768                 in_machopic_nl_symbol_ptr,                              \
 769                 ".non_lazy_symbol_pointer", 0)                          \
 770 SECTION_FUNCTION (machopic_symbol_stub_section,                         \
 771                 in_machopic_symbol_stub,                                \
 772                 ".symbol_stub", 0)                                      \
 773 SECTION_FUNCTION (machopic_symbol_stub1_section,                        \
 774                 in_machopic_symbol_stub1,                               \
 775                 ".section __TEXT,__symbol_stub1,symbol_stubs,"          \
 776                   "pure_instructions,16", 0)                            \
 777 SECTION_FUNCTION (machopic_picsymbol_stub_section,                      \
 778                 in_machopic_picsymbol_stub,                             \
 779                 ".picsymbol_stub", 0)                                   \
 780 SECTION_FUNCTION (machopic_picsymbol_stub1_section,                     \
 781                 in_machopic_picsymbol_stub1,                            \
 782                 ".section __TEXT,__picsymbolstub1,symbol_stubs,"        \
 783                   "pure_instructions,32", 0)                            \
 784 SECTION_FUNCTION (darwin_exception_section,                             \
 785                 in_darwin_exception,                                    \
 786                 ".section __DATA,__gcc_except_tab", 0)                  \
 787 SECTION_FUNCTION (darwin_eh_frame_section,                              \
 788                 in_darwin_eh_frame,                                     \
 789                 ".section " EH_FRAME_SECTION_NAME ",__eh_frame"         \
 790                   EH_FRAME_SECTION_ATTR, 0)                             \
 791 \
 792 static void                                     \
 793 objc_section_init (void)                        \
 794 {                                               \
 795   static int been_here = 0;                     \
 796                                                 \
 797   if (been_here == 0)                           \
 798     {                                           \
 799       been_here = 1;                            \
 800           /* written, cold -> hot */            \
 801       objc_cat_cls_meth_section ();             \
 802       objc_cat_inst_meth_section ();            \
 803       objc_string_object_section ();            \
 804       objc_constant_string_object_section ();   \
 805       objc_selector_refs_section ();            \
 806       objc_selector_fixup_section ();           \
 807       objc_cls_refs_section ();                 \
 808       objc_class_section ();                    \
 809       objc_meta_class_section ();               \
 810           /* shared, hot -> cold */             \
 811       objc_cls_meth_section ();                 \
 812       objc_inst_meth_section ();                \
 813       objc_protocol_section ();                 \
 814       objc_class_names_section ();              \
 815       objc_meth_var_types_section ();           \
 816       objc_meth_var_names_section ();           \
 817       objc_category_section ();                 \
 818       objc_class_vars_section ();               \
 819       objc_instance_vars_section ();            \
 820       objc_module_info_section ();              \
 821       objc_symbols_section ();                  \
 822     }                                           \
 823 }
 824
 825 #define READONLY_DATA_SECTION const_section
 826
 827 #undef  TARGET_ASM_SELECT_SECTION
 828 #define TARGET_ASM_SELECT_SECTION machopic_select_section
 829 #define USE_SELECT_SECTION_FOR_FUNCTIONS
 830
 831 #undef  TARGET_ASM_SELECT_RTX_SECTION
 832 #define TARGET_ASM_SELECT_RTX_SECTION machopic_select_rtx_section
 833 #undef  TARGET_ASM_UNIQUE_SECTION
 834 #define TARGET_ASM_UNIQUE_SECTION darwin_unique_section
 835 #undef  TARGET_ASM_FUNCTION_RODATA_SECTION
 836 #define TARGET_ASM_FUNCTION_RODATA_SECTION default_no_function_rodata_section
 837
 838
 839 #define ASM_DECLARE_UNRESOLVED_REFERENCE(FILE,NAME)                     \
 840     do {                                                                \
 841          if (FILE) {                                                    \
 842            if (MACHOPIC_INDIRECT)                                       \
 843              fprintf (FILE, "\t.lazy_reference ");                      \
 844            else                                                         \
 845              fprintf (FILE, "\t.reference ");                           \
 846            assemble_name (FILE, NAME);                                  \
 847            fprintf (FILE, "\n");                                        \
 848          }                                                              \
 849        } while (0)
 850
 851 #define ASM_DECLARE_CLASS_REFERENCE(FILE,NAME)                          \
 852     do {                                                                \
 853          if (FILE) {                                                    \
 854            fprintf (FILE, "\t");                                        \
 855            assemble_name (FILE, NAME);                                  \
 856            fprintf (FILE, "=0\n");                                      \
 857            (*targetm.asm_out.globalize_label) (FILE, NAME);             \
 858          }                                                              \
 859        } while (0)
 860
 861 /* Globalizing directive for a label.  */
 862 #define GLOBAL_ASM_OP ".globl "
 863 #define TARGET_ASM_GLOBALIZE_LABEL darwin_globalize_label
 864
 865 /* Emit an assembler directive to set visibility for a symbol.  Used
 866    to support visibility attribute and Darwin's private extern
 867    feature.  */
 868 #undef TARGET_ASM_ASSEMBLE_VISIBILITY
 869 #define TARGET_ASM_ASSEMBLE_VISIBILITY darwin_assemble_visibility
 870
 871 /* Extra attributes for Darwin.  */
 872 #define SUBTARGET_ATTRIBUTE_TABLE                                            \
 873   /* { name, min_len, max_len, decl_req, type_req, fn_type_req, handler } */ \
 874   { "weak_import", 0, 0, true, false, false,                                 \
 875     darwin_handle_weak_import_attribute }
 876
 877 #undef ASM_GENERATE_INTERNAL_LABEL
 878 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM)   \
 879   sprintf (LABEL, "*%s%ld", PREFIX, (long)(NUM))
 880
 881 #undef TARGET_ASM_MARK_DECL_PRESERVED
 882 #define TARGET_ASM_MARK_DECL_PRESERVED darwin_mark_decl_preserved
 883
 884 /* Set on a symbol with SYMBOL_FLAG_FUNCTION or
 885    MACHO_SYMBOL_FLAG_VARIABLE to indicate that the function or
 886    variable has been defined in this translation unit.  */
 887
 888 #define MACHO_SYMBOL_FLAG_VARIABLE (SYMBOL_FLAG_MACH_DEP)
 889 #define MACHO_SYMBOL_FLAG_DEFINED ((SYMBOL_FLAG_MACH_DEP) << 1)
 890
 891 /* Set on a symbol to indicate when fix-and-continue style code
 892    generation is being used and the symbol refers to a static symbol
 893    that should be rebound from new instances of a translation unit to
 894    the original instance of the data.  */
 895
 896 #define MACHO_SYMBOL_STATIC ((SYMBOL_FLAG_MACH_DEP) << 2)
 897
 898 /* Symbolic names for various things we might know about a symbol.  */
 899
 900 enum machopic_addr_class {
 901   MACHOPIC_UNDEFINED,
 902   MACHOPIC_DEFINED_DATA,
 903   MACHOPIC_UNDEFINED_DATA,
 904   MACHOPIC_DEFINED_FUNCTION,
 905   MACHOPIC_UNDEFINED_FUNCTION
 906 };
 907
 908 /* Macros defining the various PIC cases.  */
 909
 910 #define MACHO_DYNAMIC_NO_PIC_P  (TARGET_DYNAMIC_NO_PIC)
 911 #define MACHOPIC_INDIRECT       (flag_pic || MACHO_DYNAMIC_NO_PIC_P)
 912 #define MACHOPIC_JUST_INDIRECT  (flag_pic == 1 || MACHO_DYNAMIC_NO_PIC_P)
 913 #define MACHOPIC_PURE           (flag_pic == 2 && ! MACHO_DYNAMIC_NO_PIC_P)
 914
 915 #undef TARGET_ENCODE_SECTION_INFO
 916 #define TARGET_ENCODE_SECTION_INFO  darwin_encode_section_info
 917 #undef TARGET_STRIP_NAME_ENCODING
 918 #define TARGET_STRIP_NAME_ENCODING  default_strip_name_encoding
 919
 920 #define GEN_BINDER_NAME_FOR_STUB(BUF,STUB,STUB_LENGTH)          \
 921   do {                                                          \
 922     const char *const stub_ = (STUB);                           \
 923     char *buffer_ = (BUF);                                      \
 924     strcpy (buffer_, stub_);                                    \
 925     if (stub_[0] == '"')                                        \
 926       {                                                         \
 927         strcpy (buffer_ + (STUB_LENGTH) - 1, "_binder\"");      \
 928       }                                                         \
 929     else                                                        \
 930       {                                                         \
 931         strcpy (buffer_ + (STUB_LENGTH), "_binder");            \
 932       }                                                         \
 933   } while (0)
 934
 935 #define GEN_SYMBOL_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH)    \
 936   do {                                                          \
 937     const char *const symbol_ = (SYMBOL);                       \
 938     char *buffer_ = (BUF);                                      \
 939     if (name_needs_quotes (symbol_) && symbol_[0] != '"')       \
 940       {                                                         \
 941           sprintf (buffer_, "\"%s\"", symbol_);                 \
 942       }                                                         \
 943     else                                                        \
 944       {                                                         \
 945         strcpy (buffer_, symbol_);                              \
 946       }                                                         \
 947   } while (0)
 948
 949 /* Given a symbol name string, create the lazy pointer version
 950    of the symbol name.  */
 951
 952 #define GEN_LAZY_PTR_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH)  \
 953   do {                                                          \
 954     const char *symbol_ = (SYMBOL);                             \
 955     char *buffer_ = (BUF);                                      \
 956     if (symbol_[0] == '"')                                      \
 957       {                                                         \
 958         strcpy (buffer_, "\"L");                                \
 959         strcpy (buffer_ + 2, symbol_ + 1);                      \
 960         strcpy (buffer_ + (SYMBOL_LENGTH), "$lazy_ptr\"");      \
 961       }                                                         \
 962     else if (name_needs_quotes (symbol_))                       \
 963       {                                                         \
 964         strcpy (buffer_, "\"L");                                \
 965         strcpy (buffer_ + 2, symbol_);                          \
 966         strcpy (buffer_ + (SYMBOL_LENGTH) + 2, "$lazy_ptr\"");  \
 967       }                                                         \
 968     else                                                        \
 969       {                                                         \
 970         strcpy (buffer_, "L");                                  \
 971         strcpy (buffer_ + 1, symbol_);                          \
 972         strcpy (buffer_ + (SYMBOL_LENGTH) + 1, "$lazy_ptr");    \
 973       }                                                         \
 974   } while (0)
 975
 976 #define TARGET_ASM_EXCEPTION_SECTION darwin_exception_section
 977
 978 #define TARGET_ASM_EH_FRAME_SECTION darwin_eh_frame_section
 979
 980 #define EH_FRAME_SECTION_NAME   "__TEXT"
 981 #define EH_FRAME_SECTION_ATTR ",coalesced,no_toc+strip_static_syms+live_support"
 982
 983 /* Java runtime class list.  */
 984 #define JCR_SECTION_NAME "__DATA,jcr,regular,no_dead_strip"
 985
 986 #undef ASM_PREFERRED_EH_DATA_FORMAT
 987 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL)  \
 988   (((CODE) == 2 && (GLOBAL) == 1) \
 989    ? (DW_EH_PE_pcrel | DW_EH_PE_indirect | DW_EH_PE_sdata4) : \
 990      ((CODE) == 1 || (GLOBAL) == 0) ? DW_EH_PE_pcrel : DW_EH_PE_absptr)
 991
 992 #define ASM_OUTPUT_DWARF_DELTA(FILE,SIZE,LABEL1,LABEL2)  \
 993   darwin_asm_output_dwarf_delta (FILE, SIZE, LABEL1, LABEL2)
 994
 995 #define ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX(ASM_OUT_FILE, ENCODING, SIZE, ADDR, DONE)     \
 996       if (ENCODING == ASM_PREFERRED_EH_DATA_FORMAT (2, 1)) {                            \
 997         darwin_non_lazy_pcrel (ASM_OUT_FILE, ADDR);                                     \
 998         goto DONE;                                                                      \
 999       }
1000
1001 /* Experimentally, putting jump tables in text is faster on SPEC.
1002    Also this is needed for correctness for coalesced functions.  */
1003
1004 #ifndef JUMP_TABLES_IN_TEXT_SECTION
1005 #define JUMP_TABLES_IN_TEXT_SECTION 1
1006 #endif
1007
1008 #define TARGET_TERMINATE_DW2_EH_FRAME_INFO false
1009
1010 #undef TARGET_ASM_NAMED_SECTION
1011 #define TARGET_ASM_NAMED_SECTION darwin_asm_named_section
1012
1013 #define DARWIN_REGISTER_TARGET_PRAGMAS()                        \
1014   do {                                                          \
1015     c_register_pragma (0, "mark", darwin_pragma_ignore);        \
1016     c_register_pragma (0, "options", darwin_pragma_options);    \
1017     c_register_pragma (0, "segment", darwin_pragma_ignore);     \
1018     c_register_pragma (0, "unused", darwin_pragma_unused);      \
1019   } while (0)
1020
1021 #undef ASM_APP_ON
1022 #define ASM_APP_ON ""
1023 #undef ASM_APP_OFF
1024 #define ASM_APP_OFF ""
1025
1026 void darwin_register_frameworks (const char *, const char *, int);
1027 void darwin_register_objc_includes (const char *, const char *, int);
1028 #define TARGET_EXTRA_PRE_INCLUDES darwin_register_objc_includes
1029 #define TARGET_EXTRA_INCLUDES darwin_register_frameworks
1030
1031 void add_framework_path (char *);
1032 #define TARGET_OPTF add_framework_path
1033
1034 #define TARGET_HAS_F_SETLKW
1035
1036 /* Darwin before 7.0 does not have C99 functions.   */
1037 #ifndef TARGET_C99_FUNCTIONS
1038 #define TARGET_C99_FUNCTIONS 0
1039 #endif
1040
1041 #define WINT_TYPE "int"
1042
1043 #endif /* CONFIG_DARWIN_H */