path: root/gcc/config/darwin.h

/* Target definitions for Darwin (Mac OS X) systems.
   Copyright (C) 1989, 1990, 1991, 1992, 1993, 2000, 2001, 2002
   Free Software Foundation, Inc.
   Contributed by Apple Computer Inc.

This file is part of GNU CC.

GNU CC is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.

GNU CC is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with GNU CC; see the file COPYING.  If not, write to
the Free Software Foundation, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.  */

/* The definitions in this file are common to all processor types
   running Darwin, which is the kernel for Mac OS X.  Darwin is
   basically a BSD user layer laid over a Mach kernel, then evolved
   for many years (at NeXT) in parallel with other Unix systems.  So
   while the runtime is a somewhat idiosyncratic Mach-based thing,
   other definitions look like they would for a BSD variant.  */

/* Although NeXT ran on many different architectures, as of Jan 2001
   the only supported Darwin targets are PowerPC and x86.  */

/* Technically, STANDARD_EXEC_PREFIX should be /usr/libexec/, but in
   practice this makes it hard to install new compilers elsewhere, so
   leave it undefined and expect system builders to set configure args
   correctly.  */

/* One of Darwin's NeXT legacies is the Mach-O format, which is partly
   like a.out and partly like COFF, with additional features like
   multi-architecture binary support.  */

#define OBJECT_FORMAT_MACHO

/* Suppress g++ attempt to link in the math library automatically.
   (Some Darwin versions have a libm, but they seem to cause problems
   for C++ executables.)  */

#define MATH_LIBRARY ""

/* We have atexit.  */

#define HAVE_ATEXIT

/* Define an empty body for the function do_global_dtors() in libgcc2.c.  */

#define DO_GLOBAL_DTORS_BODY

/* The string value for __SIZE_TYPE__.  */

#ifndef SIZE_TYPE
#define SIZE_TYPE "long unsigned int"
#endif

/* Type used for ptrdiff_t, as a string used in a declaration.  */

#undef  PTRDIFF_TYPE
#define PTRDIFF_TYPE "int"

/* wchar_t is int.  */

#undef	WCHAR_TYPE
#define WCHAR_TYPE "int"
#undef	WCHAR_TYPE_SIZE
#define WCHAR_TYPE_SIZE 32

/* Default to using the NeXT-style runtime, since that's what is
   pre-installed on Darwin systems.  */

#define NEXT_OBJC_RUNTIME

/* Don't default to pcc-struct-return, because gcc is the only compiler, and
   we want to retain compatibility with older gcc versions.  */

#undef	DEFAULT_PCC_STRUCT_RETURN
#define DEFAULT_PCC_STRUCT_RETURN 0

/* This table intercepts weirdo options whose names would interfere
   with normal driver conventions, and either translates them into
   standardly-named options, or adds a 'Z' so that they can get to
   specs processing without interference.

   Do not expand a linker option to "-Xlinker -<option>", since that
   forfeits the ability to control via spec strings later.  However,
   as a special exception, do this translation with -filelist, because
   otherwise the driver will think there are no input files and quit.
   (The alternative would be to hack the driver to recognize -filelist
   specially, but it's simpler to use the translation table.)

   Note that an option name with a prefix that matches another option
   name, that also takes an argument, needs to be modified so the
   prefix is different, otherwise a '*' after the shorter option will
   match with the longer one.  */
/* Ignore -dynamic for now */
#define TARGET_OPTION_TRANSLATE_TABLE \
  { "-all_load", "-Zall_load" },  \
  { "-allowable_client", "-Zallowable_client" },  \
  { "-arch_errors_fatal", "-Zarch_errors_fatal" },  \
  { "-bind_at_load", "-Zbind_at_load" },  \
  { "-bundle", "-Zbundle" },  \
  { "-bundle_loader", "-Zbundle_loader" },  \
  { "-weak_reference_mismatches", "-Zweak_reference_mismatches" },  \
  { "-dependency-file", "-MF" }, \
  { "-dylib_file", "-Zdylib_file" }, \
  { "-dynamic", " " },  \
  { "-dynamiclib", "-Zdynamiclib" },  \
  { "-exported_symbols_list", "-Zexported_symbols_list" },  \
  { "-seg_addr_table_filename", "-Zseg_addr_table_filename" }, \
  { "-filelist", "-Xlinker -filelist -Xlinker" },  \
  { "-flat_namespace", "-Zflat_namespace" },  \
  { "-force_cpusubtype_ALL", "-Zforce_cpusubtype_ALL" },  \
  { "-force_flat_namespace", "-Zforce_flat_namespace" },  \
  { "-image_base", "-Zimage_base" },  \
  { "-init", "-Zinit" },  \
  { "-install_name", "-Zinstall_name" },  \
  { "-multiply_defined_unused", "-Zmultiplydefinedunused" },  \
  { "-multiply_defined", "-Zmultiply_defined" },  \
  { "-multi_module", "-Zmulti_module" },  \
  { "-static", "-static -Wa,-static" },  \
  { "-single_module", "-Zsingle_module" },  \
  { "-unexported_symbols_list", "-Zunexported_symbols_list" }

/* These compiler options take n arguments.  */

#undef  WORD_SWITCH_TAKES_ARG
#define WORD_SWITCH_TAKES_ARG(STR)              \
  (DEFAULT_WORD_SWITCH_TAKES_ARG (STR) ? 1 :    \
   !strcmp (STR, "Zallowable_client") ? 1 :     \
   !strcmp (STR, "arch") ? 1 :                  \
   !strcmp (STR, "arch_only") ? 1 :             \
   !strcmp (STR, "Zbundle_loader") ? 1 :        \
   !strcmp (STR, "client_name") ? 1 :           \
   !strcmp (STR, "compatibility_version") ? 1 : \
   !strcmp (STR, "current_version") ? 1 :       \
   !strcmp (STR, "Zdylib_file") ? 1 :           \
   !strcmp (STR, "Zexported_symbols_list") ? 1 : \
   !strcmp (STR, "Zimage_base") ? 1 :           \
   !strcmp (STR, "Zinit") ? 1 :                 \
   !strcmp (STR, "Zinstall_name") ? 1 :         \
   !strcmp (STR, "Zmultiplydefinedunused") ? 1 : \
   !strcmp (STR, "Zmultiply_defined") ? 1 :     \
   !strcmp (STR, "precomp-trustfile") ? 1 :     \
   !strcmp (STR, "read_only_relocs") ? 1 :      \
   !strcmp (STR, "sectcreate") ? 3 :            \
   !strcmp (STR, "sectorder") ? 3 :             \
   !strcmp (STR, "Zseg_addr_table_filename") ?1 :\
   !strcmp (STR, "seg1addr") ? 1 :              \
   !strcmp (STR, "segprot") ? 3 :               \
   !strcmp (STR, "seg_addr_table") ? 1 :        \
   !strcmp (STR, "sub_library") ? 1 :           \
   !strcmp (STR, "sub_umbrella") ? 1 :          \
   !strcmp (STR, "umbrella") ? 1 :              \
   !strcmp (STR, "undefined") ? 1 :             \
   !strcmp (STR, "Zunexported_symbols_list") ? 1 : \
   !strcmp (STR, "Zweak_reference_mismatches") ? 1 : \
   !strcmp (STR, "pagezero_size") ? 1 :         \
   !strcmp (STR, "segs_read_only_addr") ? 1 :   \
   !strcmp (STR, "segs_read_write_addr") ? 1 :  \
   !strcmp (STR, "sectalign") ? 3 :             \
   !strcmp (STR, "sectobjectsymbols") ? 2 :     \
   !strcmp (STR, "segcreate") ? 3 :             \
   !strcmp (STR, "dylinker_install_name") ? 1 : \
   0)

/* Machine dependent cpp options.  */

#undef	CPP_SPEC
#define CPP_SPEC "%{static:-D__STATIC__}%{!static:-D__DYNAMIC__}"

/* This is mostly a clone of the standard LINK_COMMAND_SPEC, plus
   precomp, libtool, and fat build additions.  Also we
   don't specify a second %G after %L because libSystem is
   self-contained and doesn't need to link against libgcc.a.  */
/* In general, random Darwin linker flags should go into LINK_SPEC
   instead of LINK_COMMAND_SPEC.  The command spec is better for
   specifying the handling of options understood by generic Unix
   linkers, and for positional arguments like libraries.  */
#define LINK_COMMAND_SPEC "\
%{!fdump=*:%{!fsyntax-only:%{!precomp:%{!c:%{!M:%{!MM:%{!E:%{!S:\
    %{!Zdynamiclib:%(linker)}%{Zdynamiclib:/usr/bin/libtool} \
    %l %X %{d} %{s} %{t} %{Z} \
    %{!Zdynamiclib:%{A} %{e*} %{m} %{N} %{n} %{r} %{u*} %{x} %{z}} \
    %{@:-o %f%u.out}%{!@:%{o*}%{!o:-o a.out}} \
    %{!Zdynamiclib:%{!A:%{!nostdlib:%{!nostartfiles:%S}}}} \
    %{L*} %(link_libgcc) %o %{!nostdlib:%{!nodefaultlibs:%G %L}} \
    %{!A:%{!nostdlib:%{!nostartfiles:%E}}} %{T*} %{F*} \
    %{!--help:%{!no-c++filt|c++filt:| c++filt3 }} }}}}}}}}"

/* Please keep the random linker options in alphabetical order (modulo
   'Z' and 'no' prefixes).  Options that can only go to one of libtool
   or ld must be listed twice, under both !Zdynamiclib and
   Zdynamiclib, with one of the cases reporting an error.  */
/* Note that options taking arguments may appear multiple times on a
   command line with different arguments each time, so put a * after
   their names so all of them get passed.  */
#define LINK_SPEC  \
  "%{static}%{!static:-dynamic} \
   %{!Zdynamiclib: \
     %{Zbundle:-bundle} \
     %{Zbundle_loader*:-bundle_loader %*} \
     %{client_name*} \
     %{compatibility_version*:%e-compatibility_version only allowed with -dynamiclib\
} \
     %{current_version*:%e-current_version only allowed with -dynamiclib} \
     %{Zforce_cpusubtype_ALL:-force_cpusubtype_ALL} \
     %{Zforce_flat_namespace:-force_flat_namespace} \
     %{Zinstall_name*:%e-install_name only allowed with -dynamiclib} \
     %{keep_private_externs} \
     %{private_bundle} \
    } \
   %{Zdynamiclib: \
     %{Zbundle:%e-bundle not allowed with -dynamiclib} \
     %{Zbundle_loader*:%e-bundle_loader not allowed with -dynamiclib} \
     %{client_name*:%e-client_name not allowed with -dynamiclib} \
     %{compatibility_version*} \
     %{current_version*} \
     %{Zforce_cpusubtype_ALL:%e-force_cpusubtype_ALL not allowed with -dynamiclib} \
     %{Zforce_flat_namespace:%e-force_flat_namespace not allowed with -dynamiclib} \
     %{Zinstall_name*:-install_name %*} \
     %{keep_private_externs:%e-keep_private_externs not allowed with -dynamiclib} \
     %{private_bundle:%e-private_bundle not allowed with -dynamiclib} \
    } \
   %{Zall_load:-all_load}%{Zdynamiclib:%{!Zall_load:-noall_load}} \
   %{Zallowable_client*:-allowable_client %*} \
   %{Zbind_at_load:-bind_at_load} \
   %{Zarch_errors_fatal:-arch_errors_fatal} \
   %{Zdylib_file*:-dylib_file %*} \
   %{Zexported_symbols_list*:-exported_symbols_list %*} \
   %{Zflat_namespace:-flat_namespace} \
   %{headerpad_max_install_names*} \
   %{Zimage_base*:-image_base %*} \
   %{Zinit*:-init %*} \
   %{nomultidefs} \
   %{Zmulti_module:-multi_module} %{Zsingle_module:-single_module} \
   %{Zmultiply_defined*:-multiply_defined %*} \
   %{Zmultiplydefinedunused*:-multiply_defined_unused %*} \
   %{prebind} %{noprebind} %{prebind_all_twolevel_modules} \
   %{read_only_relocs} \
   %{sectcreate*} %{sectorder*} %{seg1addr*} %{segprot*} %{seg_addr_table*} \
   %{Zseg_addr_table_filename*:-seg_addr_table_filename %*} \
   %{sub_library*} %{sub_umbrella*} \
   %{twolevel_namespace} %{twolevel_namespace_hints} \
   %{umbrella*} \
   %{undefined*} \
   %{Zunexported_symbols_list*:-unexported_symbols_list %*} \
   %{Zweak_reference_mismatches*:-weak_reference_mismatches %*} \
   %{X} \
   %{y*} \
   %{w} \
   %{pagezero_size*} %{segs_read_*} %{seglinkedit} %{noseglinkedit}  \
   %{sectalign*} %{sectobjectsymbols*} %{segcreate*} %{whyload} \
   %{whatsloaded} %{dylinker_install_name*} \
   %{dylinker} %{Mach} "


/* Machine dependent libraries.  */

#undef	LIB_SPEC
#define LIB_SPEC "%{!static:-lSystem}"

/* We specify crt0.o as -lcrt0.o so that ld will search the library path.  */

#undef  STARTFILE_SPEC
#define STARTFILE_SPEC  \
  "%{!Zdynamiclib:%{Zbundle:%{!static:-lbundle1.o}} \
     %{!Zbundle:%{pg:%{static:-lgcrt0.o} \
                     %{!static:%{object:-lgcrt0.o} \
                               %{!object:%{preload:-lgcrt0.o} \
                                 %{!preload:-lgcrt1.o -lcrt2.o}}}} \
                %{!pg:%{static:-lcrt0.o} \
                      %{!static:%{object:-lcrt0.o} \
                                %{!object:%{preload:-lcrt0.o} \
                                  %{!preload:-lcrt1.o -lcrt2.o}}}}}}"

/* The native Darwin linker doesn't necessarily place files in the order
   that they're specified on the link line.  Thus, it is pointless
   to put anything in ENDFILE_SPEC.  */
/* #define ENDFILE_SPEC "" */

#undef	DOLLARS_IN_IDENTIFIERS
#define DOLLARS_IN_IDENTIFIERS 2

/* We use Dbx symbol format.  */

#define DBX_DEBUGGING_INFO 1

/* When generating stabs debugging, use N_BINCL entries.  */

#define DBX_USE_BINCL

/* There is no limit to the length of stabs strings.  */

#define DBX_CONTIN_LENGTH 0

/* gdb needs a null N_SO at the end of each file for scattered loading.  */

#undef	DBX_OUTPUT_MAIN_SOURCE_FILE_END
#define DBX_OUTPUT_MAIN_SOURCE_FILE_END(FILE, FILENAME)			\
do { text_section ();							\
     fprintf (FILE,							\
	      "\t.stabs \"%s\",%d,0,0,Letext\nLetext:\n", "" , N_SO);	\
   } while (0)

/* Our profiling scheme doesn't LP labels and counter words.  */

#define NO_PROFILE_COUNTERS

#undef	INIT_SECTION_ASM_OP
#define INIT_SECTION_ASM_OP

#undef	INVOKE__main

#define TARGET_ASM_CONSTRUCTOR  machopic_asm_out_constructor
#define TARGET_ASM_DESTRUCTOR   machopic_asm_out_destructor

/* Always prefix with an underscore.  */

#define USER_LABEL_PREFIX "_"

/* Don't output a .file directive.  That is only used by the assembler for
   error reporting.  */

#undef	ASM_FILE_START
#define ASM_FILE_START(FILE)

#undef	ASM_FILE_END
#define ASM_FILE_END(FILE)					\
  do {								\
    machopic_finish (asm_out_file);                             \
    if (strcmp (lang_hooks.name, "GNU C++") == 0)		\
      {								\
	constructor_section ();					\
	destructor_section ();					\
	ASM_OUTPUT_ALIGN (FILE, 1);				\
      }								\
  } while (0)

#define ASM_OUTPUT_SKIP(FILE,SIZE)  \
  fprintf (FILE, "\t.space %d\n", SIZE)

/* Give ObjC methods pretty symbol names.  */

#undef	OBJC_GEN_METHOD_LABEL
#define OBJC_GEN_METHOD_LABEL(BUF,IS_INST,CLASS_NAME,CAT_NAME,SEL_NAME,NUM) \
  do { if (CAT_NAME)							\
	 sprintf (BUF, "%c[%s(%s) %s]", (IS_INST) ? '-' : '+',		\
		  (CLASS_NAME), (CAT_NAME), (SEL_NAME));		\
       else								\
	 sprintf (BUF, "%c[%s %s]", (IS_INST) ? '-' : '+',		\
		  (CLASS_NAME), (SEL_NAME));				\
     } while (0)

/* The RTTI data (e.g., __ti4name) is common and public (and static),
   but it does need to be referenced via indirect PIC data pointers.
   The machopic_define_name calls are telling the machopic subsystem
   that the name *is* defined in this module, so it doesn't need to
   make them indirect.  */

#undef ASM_DECLARE_OBJECT_NAME
#define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL)			\
  do {									\
    const char *xname = NAME;                                           \
    if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF)             \
      xname = IDENTIFIER_POINTER (DECL_NAME (DECL));                    \
    if ((TREE_STATIC (DECL)                                             \
	 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))               \
        || DECL_INITIAL (DECL))                                         \
      machopic_define_name (xname);                                     \
    if ((TREE_STATIC (DECL)                                             \
	 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))               \
        || DECL_INITIAL (DECL))                                         \
      (* targetm.encode_section_info) (DECL, false);			\
    ASM_OUTPUT_LABEL (FILE, xname);                                     \
  } while (0)

#define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL)                     \
  do {									\
    const char *xname = NAME;                                           \
    if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF)             \
      xname = IDENTIFIER_POINTER (DECL_NAME (DECL));                    \
    if ((TREE_STATIC (DECL)                                             \
	 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))               \
        || DECL_INITIAL (DECL))                                         \
      machopic_define_name (xname);                                     \
    if ((TREE_STATIC (DECL)                                             \
	 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))               \
        || DECL_INITIAL (DECL))                                         \
      (* targetm.encode_section_info) (DECL, false);			\
    ASM_OUTPUT_LABEL (FILE, xname);                                     \
    /* Avoid generating stubs for functions we've just defined by	\
       outputting any required stub name label now.  */			\
    machopic_output_possible_stub_label (FILE, xname);			\
  } while (0)

/* Wrap new method names in quotes so the assembler doesn't gag.
   Make Objective-C internal symbols local.  */

#undef	ASM_OUTPUT_LABELREF
#define ASM_OUTPUT_LABELREF(FILE,NAME)					     \
  do {									     \
       const char *xname = darwin_strip_name_encoding (NAME);		     \
       if (xname[0] == '&' || xname[0] == '*')				     \
         {								     \
           int len = strlen (xname);					     \
	   if (len > 6 && !strcmp ("$stub", xname + len - 5))		     \
	     machopic_validate_stub_or_non_lazy_ptr (xname, 1);		     \
	   else if (len > 7 && !strcmp ("$stub\"", xname + len - 6))	     \
	     machopic_validate_stub_or_non_lazy_ptr (xname, 1);		     \
	   else if (len > 14 && !strcmp ("$non_lazy_ptr", xname + len - 13)) \
	     machopic_validate_stub_or_non_lazy_ptr (xname, 0);		     \
	   fputs (&xname[1], FILE);					     \
	 }								     \
       else if (xname[0] == '+' || xname[0] == '-')			     \
         fprintf (FILE, "\"%s\"", xname);				     \
       else if (!strncmp (xname, "_OBJC_", 6))				     \
         fprintf (FILE, "L%s", xname);					     \
       else if (!strncmp (xname, ".objc_class_name_", 17))		     \
	 fprintf (FILE, "%s", xname);					     \
       else								     \
         fprintf (FILE, "_%s", xname);					     \
  } while (0)

/* Output before executable code.  */
#undef TEXT_SECTION_ASM_OP
#define TEXT_SECTION_ASM_OP ".text"

/* Output before writable data.  */

#undef DATA_SECTION_ASM_OP
#define DATA_SECTION_ASM_OP ".data"

#undef	ALIGN_ASM_OP
#define ALIGN_ASM_OP		".align"

#undef	ASM_OUTPUT_ALIGN
#define ASM_OUTPUT_ALIGN(FILE,LOG)	\
  if ((LOG) != 0)			\
    fprintf (FILE, "\t%s %d\n", ALIGN_ASM_OP, (LOG))

/* Ensure correct alignment of bss data.  */

#undef	ASM_OUTPUT_ALIGNED_DECL_LOCAL
#define ASM_OUTPUT_ALIGNED_DECL_LOCAL(FILE, DECL, NAME, SIZE, ALIGN)	\
  do {									\
    fputs (".lcomm ", (FILE));						\
    assemble_name ((FILE), (NAME));					\
    fprintf ((FILE), ",%u,%u\n", (SIZE),				\
	     floor_log2 ((ALIGN) / BITS_PER_UNIT));			\
    if ((DECL) && ((TREE_STATIC (DECL)					\
	 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))		\
        || DECL_INITIAL (DECL)))					\
      (* targetm.encode_section_info) (DECL, false);			\
    if ((DECL) && ((TREE_STATIC (DECL)					\
	 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))		\
        || DECL_INITIAL (DECL)))					\
      machopic_define_name (NAME);					\
  } while (0)

/* The maximum alignment which the object file format can support.
   For Mach-O, this is 2^15.  */

#undef	MAX_OFILE_ALIGNMENT
#define MAX_OFILE_ALIGNMENT 0x8000

/* Create new Mach-O sections.  */

#undef	SECTION_FUNCTION
#define SECTION_FUNCTION(FUNCTION, SECTION, DIRECTIVE, OBJC)		\
extern void FUNCTION PARAMS ((void));					\
void									\
FUNCTION ()								\
{									\
  if (in_section != SECTION)						\
    {									\
      if (OBJC)								\
	objc_section_init ();						\
      data_section ();							\
      if (asm_out_file)							\
	fprintf (asm_out_file, "%s\n", DIRECTIVE);			\
      in_section = SECTION;						\
    }									\
}									\

/* Darwin uses many types of special sections.  */

#undef	EXTRA_SECTIONS
#define EXTRA_SECTIONS					\
  in_const, in_const_data, in_cstring, in_literal4, in_literal8,	\
  in_constructor, in_destructor, in_mod_init, in_mod_term,		\
  in_objc_class, in_objc_meta_class, in_objc_category,	\
  in_objc_class_vars, in_objc_instance_vars,		\
  in_objc_cls_meth, in_objc_inst_meth,			\
  in_objc_cat_cls_meth, in_objc_cat_inst_meth,		\
  in_objc_selector_refs,				\
  in_objc_selector_fixup,				\
  in_objc_symbols, in_objc_module_info,			\
  in_objc_protocol, in_objc_string_object,		\
  in_objc_constant_string_object,			\
  in_objc_class_names, in_objc_meth_var_names,		\
  in_objc_meth_var_types, in_objc_cls_refs, 		\
  in_machopic_nl_symbol_ptr,				\
  in_machopic_lazy_symbol_ptr,				\
  in_machopic_symbol_stub,				\
  in_machopic_picsymbol_stub,				\
  in_darwin_exception, in_darwin_eh_frame,		\
  num_sections

#undef	EXTRA_SECTION_FUNCTIONS
#define EXTRA_SECTION_FUNCTIONS			\
static void objc_section_init PARAMS ((void));	\
SECTION_FUNCTION (const_section,		\
                  in_const,			\
                  ".const", 0)			\
SECTION_FUNCTION (const_data_section,		\
                  in_const_data,		\
                  ".const_data", 0)		\
SECTION_FUNCTION (cstring_section,		\
		  in_cstring,			\
		  ".cstring", 0)		\
SECTION_FUNCTION (literal4_section,		\
		  in_literal4,			\
		  ".literal4", 0)		\
SECTION_FUNCTION (literal8_section,		\
		  in_literal8,			\
		  ".literal8", 0)		\
SECTION_FUNCTION (constructor_section,		\
		  in_constructor,		\
		  ".constructor", 0)		\
SECTION_FUNCTION (mod_init_section,		\
		  in_mod_init,			\
		  ".mod_init_func", 0)	\
SECTION_FUNCTION (mod_term_section, \
		  in_mod_term,			\
		  ".mod_term_func", 0)	\
SECTION_FUNCTION (destructor_section,		\
		  in_destructor,		\
		  ".destructor", 0)		\
SECTION_FUNCTION (objc_class_section,		\
		  in_objc_class,		\
		  ".objc_class", 1)		\
SECTION_FUNCTION (objc_meta_class_section,	\
		  in_objc_meta_class,		\
		  ".objc_meta_class", 1)	\
SECTION_FUNCTION (objc_category_section,	\
		  in_objc_category,		\
		".objc_category", 1)		\
SECTION_FUNCTION (objc_class_vars_section,	\
		  in_objc_class_vars,		\
		  ".objc_class_vars", 1)	\
SECTION_FUNCTION (objc_instance_vars_section,	\
		  in_objc_instance_vars,	\
		  ".objc_instance_vars", 1)	\
SECTION_FUNCTION (objc_cls_meth_section,	\
		  in_objc_cls_meth,		\
		  ".objc_cls_meth", 1)	\
SECTION_FUNCTION (objc_inst_meth_section,	\
		  in_objc_inst_meth,		\
		  ".objc_inst_meth", 1)	\
SECTION_FUNCTION (objc_cat_cls_meth_section,	\
		  in_objc_cat_cls_meth,		\
		  ".objc_cat_cls_meth", 1)	\
SECTION_FUNCTION (objc_cat_inst_meth_section,	\
		  in_objc_cat_inst_meth,	\
		  ".objc_cat_inst_meth", 1)	\
SECTION_FUNCTION (objc_selector_refs_section,	\
		  in_objc_selector_refs,	\
		  ".objc_message_refs", 1)	\
SECTION_FUNCTION (objc_selector_fixup_section,	\
		  in_objc_selector_fixup,	\
		  ".section __OBJC, __sel_fixup", 1)	\
SECTION_FUNCTION (objc_symbols_section,		\
		  in_objc_symbols,		\
		  ".objc_symbols", 1)	\
SECTION_FUNCTION (objc_module_info_section,	\
		  in_objc_module_info,		\
		  ".objc_module_info", 1)	\
SECTION_FUNCTION (objc_protocol_section,	\
		  in_objc_protocol,		\
		  ".objc_protocol", 1)	\
SECTION_FUNCTION (objc_string_object_section,	\
		  in_objc_string_object,	\
		  ".objc_string_object", 1)	\
SECTION_FUNCTION (objc_constant_string_object_section,	\
		  in_objc_constant_string_object,	\
		  ".section __OBJC, __cstring_object", 1)	\
SECTION_FUNCTION (objc_class_names_section,	\
		in_objc_class_names,		\
		".objc_class_names", 1)	\
SECTION_FUNCTION (objc_meth_var_names_section,	\
		in_objc_meth_var_names,		\
		".objc_meth_var_names", 1)	\
SECTION_FUNCTION (objc_meth_var_types_section,	\
		in_objc_meth_var_types,		\
		".objc_meth_var_types", 1)	\
SECTION_FUNCTION (objc_cls_refs_section,	\
		in_objc_cls_refs,		\
		".objc_cls_refs", 1)		\
						\
SECTION_FUNCTION (machopic_lazy_symbol_ptr_section,	\
		in_machopic_lazy_symbol_ptr,		\
		".lazy_symbol_pointer", 0)      	\
SECTION_FUNCTION (machopic_nl_symbol_ptr_section,	\
		in_machopic_nl_symbol_ptr,		\
		".non_lazy_symbol_pointer", 0)      	\
SECTION_FUNCTION (machopic_symbol_stub_section,		\
		in_machopic_symbol_stub,		\
		".symbol_stub", 0)      		\
SECTION_FUNCTION (machopic_picsymbol_stub_section,	\
		in_machopic_picsymbol_stub,		\
		".picsymbol_stub", 0)      		\
SECTION_FUNCTION (darwin_exception_section,		\
		in_darwin_exception,			\
		".section __DATA,__gcc_except_tab", 0)	\
SECTION_FUNCTION (darwin_eh_frame_section,		\
		in_darwin_eh_frame,			\
		".section __TEXT,__eh_frame", 0)	\
							\
static void					\
objc_section_init ()				\
{						\
  static int been_here = 0;			\
						\
  if (been_here == 0)				\
    {						\
      been_here = 1;				\
          /* written, cold -> hot */		\
      objc_cat_cls_meth_section ();		\
      objc_cat_inst_meth_section ();		\
      objc_string_object_section ();		\
      objc_constant_string_object_section ();	\
      objc_selector_refs_section ();		\
      objc_selector_fixup_section ();		\
      objc_cls_refs_section ();			\
      objc_class_section ();			\
      objc_meta_class_section ();		\
          /* shared, hot -> cold */    		\
      objc_cls_meth_section ();			\
      objc_inst_meth_section ();		\
      objc_protocol_section ();			\
      objc_class_names_section ();		\
      objc_meth_var_types_section ();		\
      objc_meth_var_names_section ();		\
      objc_category_section ();			\
      objc_class_vars_section ();		\
      objc_instance_vars_section ();		\
      objc_module_info_section ();		\
      objc_symbols_section ();			\
    }						\
}

#define READONLY_DATA_SECTION const_section

#undef	TARGET_ASM_SELECT_SECTION
#define TARGET_ASM_SELECT_SECTION machopic_select_section
#undef	TARGET_ASM_SELECT_RTX_SECTION
#define TARGET_ASM_SELECT_RTX_SECTION machopic_select_rtx_section

#define ASM_DECLARE_UNRESOLVED_REFERENCE(FILE,NAME)			\
    do { 								\
	 if (FILE) {							\
	   if (flag_pic)						\
	     fprintf (FILE, "\t.lazy_reference ");			\
	   else								\
	     fprintf (FILE, "\t.reference ");				\
	   assemble_name (FILE, NAME);					\
	   fprintf (FILE, "\n");					\
	 }                                                              \
       } while (0)

#define ASM_DECLARE_CLASS_REFERENCE(FILE,NAME)				\
    do {								\
	 if (FILE) {							\
	   fprintf (FILE, "\t");					\
	   assemble_name (FILE, NAME); 					\
	   fprintf (FILE, "=0\n");					\
	   (*targetm.asm_out.globalize_label) (FILE, NAME);		\
	 }								\
       } while (0)

/* Globalizing directive for a label.  */
#define GLOBAL_ASM_OP ".globl "
#define TARGET_ASM_GLOBALIZE_LABEL darwin_globalize_label

#undef ASM_GENERATE_INTERNAL_LABEL
#define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM)	\
  sprintf (LABEL, "*%s%ld", PREFIX, (long)(NUM))

/* This is how to output an internal numbered label where PREFIX is
   the class of label and NUM is the number within the class.  */

#undef ASM_OUTPUT_INTERNAL_LABEL
#define ASM_OUTPUT_INTERNAL_LABEL(FILE,PREFIX,NUM)	\
  fprintf (FILE, "%s%d:\n", PREFIX, NUM)

/* Since we have a separate readonly data section, define this so that
   jump tables end up in text rather than data.  */

#ifndef JUMP_TABLES_IN_TEXT_SECTION
#define JUMP_TABLES_IN_TEXT_SECTION 1
#endif

/* Symbolic names for various things we might know about a symbol.  */

enum machopic_addr_class {
  MACHOPIC_UNDEFINED,
  MACHOPIC_DEFINED_DATA,
  MACHOPIC_UNDEFINED_DATA,
  MACHOPIC_DEFINED_FUNCTION,
  MACHOPIC_UNDEFINED_FUNCTION
};

/* Macros defining the various PIC cases.  */

#define MACHOPIC_INDIRECT      (flag_pic)
#define MACHOPIC_JUST_INDIRECT (flag_pic == 1)
#define MACHOPIC_PURE          (flag_pic == 2)

#undef TARGET_ENCODE_SECTION_INFO
#define TARGET_ENCODE_SECTION_INFO  darwin_encode_section_info
#undef TARGET_STRIP_NAME_ENCODING
#define TARGET_STRIP_NAME_ENCODING  darwin_strip_name_encoding

#define GEN_BINDER_NAME_FOR_STUB(BUF,STUB,STUB_LENGTH)		\
  do {								\
    const char *const stub_ = (STUB);				\
    char *buffer_ = (BUF);					\
    strcpy (buffer_, stub_);					\
    if (stub_[0] == '"')					\
      {								\
	strcpy (buffer_ + (STUB_LENGTH) - 1, "_binder\"");	\
      }								\
    else							\
      {								\
	strcpy (buffer_ + (STUB_LENGTH), "_binder");		\
      }								\
  } while (0)

#define GEN_SYMBOL_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH)	\
  do {								\
    const char *const symbol_ = (SYMBOL);			\
    char *buffer_ = (BUF);					\
    if (name_needs_quotes (symbol_) && symbol_[0] != '"')	\
      {								\
	  sprintf (buffer_, "\"%s\"", symbol_);			\
      }								\
    else							\
      {								\
	strcpy (buffer_, symbol_);				\
      }								\
  } while (0)

/* Given a symbol name string, create the lazy pointer version
   of the symbol name.  */

#define GEN_LAZY_PTR_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH)	\
  do {								\
    const char *symbol_ = darwin_strip_name_encoding (SYMBOL);	\
    char *buffer_ = (BUF);					\
    if (symbol_[0] == '"')					\
      {								\
        strcpy (buffer_, "\"L");				\
        strcpy (buffer_ + 2, symbol_ + 1);			\
	strcpy (buffer_ + (SYMBOL_LENGTH), "$lazy_ptr\"");	\
      }								\
    else if (name_needs_quotes (symbol_))			\
      {								\
        strcpy (buffer_, "\"L");				\
        strcpy (buffer_ + 2, symbol_);				\
	strcpy (buffer_ + (SYMBOL_LENGTH) + 2, "$lazy_ptr\"");	\
      }								\
    else							\
      {								\
        strcpy (buffer_, "L");					\
        strcpy (buffer_ + 1, symbol_);				\
	strcpy (buffer_ + (SYMBOL_LENGTH) + 1, "$lazy_ptr");	\
      }								\
  } while (0)

#define TARGET_ASM_EXCEPTION_SECTION darwin_exception_section

#define TARGET_ASM_EH_FRAME_SECTION darwin_eh_frame_section
  
#undef ASM_PREFERRED_EH_DATA_FORMAT
#define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL)  \
  (((CODE) == 2 && (GLOBAL) == 1) \
   ? (DW_EH_PE_pcrel | DW_EH_PE_indirect) : \
     ((CODE) == 1 || (GLOBAL) == 0) ? DW_EH_PE_pcrel : DW_EH_PE_absptr)

#define ASM_OUTPUT_DWARF_DELTA(FILE,SIZE,LABEL1,LABEL2)  \
  darwin_asm_output_dwarf_delta (FILE, SIZE, LABEL1, LABEL2)

#define TARGET_TERMINATE_DW2_EH_FRAME_INFO false

#define DARWIN_REGISTER_TARGET_PRAGMAS(PFILE)				\
  do {									\
    cpp_register_pragma (PFILE, 0, "mark", darwin_pragma_ignore);	\
    cpp_register_pragma (PFILE, 0, "options", darwin_pragma_options);	\
    cpp_register_pragma (PFILE, 0, "segment", darwin_pragma_ignore);	\
    cpp_register_pragma (PFILE, 0, "unused", darwin_pragma_unused);	\
  } while (0)

#undef ASM_APP_ON
#define ASM_APP_ON ""
#undef ASM_APP_OFF
#define ASM_APP_OFF ""