path: root/gcc/config/darwin.h

/* Target definitions for Darwin (Mac OS X) systems.
   Copyright (C) 1989, 1990, 1991, 1992, 1993, 2000, 2001
   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.  */

/* 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

/* Don't warn about MacOS-style 'APPL' four-char-constants.  */

#undef WARN_FOUR_CHAR_CONSTANTS
#define WARN_FOUR_CHAR_CONSTANTS 0

/* Machine dependent cpp options.  */

/* The sequence here allows us to get a more specific version number
   glued into __APPLE_CC__.  Normally this number would be updated as
   part of submitting to a release engineering organization.  */

#ifndef APPLE_CC
#define APPLE_CC 999
#endif

#define STRINGIFY_THIS(x) # x
#define REALLY_STRINGIFY(x) STRINGIFY_THIS(x)

#undef	CPP_SPEC
#define CPP_SPEC "-D__APPLE_CC__=" REALLY_STRINGIFY(APPLE_CC) "	\
		  %{static:-D__STATIC__}%{!static:-D__DYNAMIC__}"

/* 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  \
  "%{pg:%{static:-lgcrt0.o}%{!static:-lgcrt1.o}} \
    %{!pg:%{static:-lcrt0.o}%{!static:-lcrt1.o}}"

#undef	DOLLARS_IN_IDENTIFIERS
#define DOLLARS_IN_IDENTIFIERS 2

/* Allow #sccs (but don't do anything). */

#define SCCS_DIRECTIVE

/* We use Dbx symbol format.  */

#define DBX_DEBUGGING_INFO

/* Also enable Dwarf 2 as an option.  */

#define DWARF2_DEBUGGING_INFO

#define PREFERRED_DEBUGGING_TYPE DBX_DEBUG

/* 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

/* Don't use .gcc_compiled symbols to communicate with GDB;
   They interfere with numerically sorted symbol lists. */

#undef	ASM_IDENTIFY_GCC
#define ASM_IDENTIFY_GCC(asm_out_file)

#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


/* 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)

/* Give ObjcC 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))                                         \
      ENCODE_SECTION_INFO (DECL);  \
    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))                                         \
      ENCODE_SECTION_INFO (DECL);					\
    ASM_OUTPUT_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 {									\
       STRIP_NAME_ENCODING (NAME, NAME);  \
       if (NAME[0] == '&' || NAME[0] == '*')				\
         {								\
           int len = strlen (NAME);					\
	   if (len > 6 && !strcmp ("$stub", NAME + len - 5))		\
	     machopic_validate_stub_or_non_lazy_ptr (NAME, 1);		\
	   else if (len > 7 && !strcmp ("$stub\"", NAME + len - 6))	\
	     machopic_validate_stub_or_non_lazy_ptr (NAME, 1);		\
	   else if (len > 14 && !strcmp ("$non_lazy_ptr", NAME + len - 13)) \
	     machopic_validate_stub_or_non_lazy_ptr (NAME, 0);		\
	   fputs (&NAME[1], FILE); \
	 } \
       else if (NAME[0] == '+' || NAME[0] == '-')   \
         fprintf (FILE, "\"%s\"", NAME); \
       else if (!strncmp (NAME, "_OBJC_", 6))  \
         fprintf (FILE, "L%s", NAME);   \
       else if (!strncmp (NAME, ".objc_class_name_", 17))		\
	 fprintf (FILE, "%s", NAME);					\
       else								\
         fprintf (FILE, "_%s", NAME);					\
  } while (0)

#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)))                                         \
      ENCODE_SECTION_INFO (DECL);  \
    if ((DECL) && ((TREE_STATIC (DECL)                                             \
	 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))               \
        || DECL_INITIAL (DECL)))                                         \
      machopic_define_name (NAME);                                     \
  } while (0)

/* Output nothing for #ident.  */

#undef	ASM_OUTPUT_IDENT
#define ASM_OUTPUT_IDENT(FILE, NAME)

/* 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;						\
    }									\
}									\

#define ALIAS_SECTION(enum_value, alias_name) 				\
do { if (!strcmp (alias_name, name))					\
       section_alias[enum_value] = (alias ? get_identifier (alias) : 0);  \
   } while (0)

/* 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 __TEXT,__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 ();			\
    }						\
} 						\
static tree section_alias[(int) num_sections];	\
static void try_section_alias PARAMS ((void));	\
static void try_section_alias () 		\
{						\
    if (section_alias[in_section] && asm_out_file) \
      fprintf (asm_out_file, "%s\n",		\
	       IDENTIFIER_POINTER (section_alias[in_section]));	\
}      						\

#if 0
static void alias_section PARAMS ((const char *, const char *)); \
static void alias_section (name, alias)			\
     const char *name, *alias;				\
{							\
    ALIAS_SECTION (in_data, "data");			\
    ALIAS_SECTION (in_text, "text");			\
    ALIAS_SECTION (in_const, "const");			\
    ALIAS_SECTION (in_const_data, "const_data");	\
    ALIAS_SECTION (in_cstring, "cstring");		\
    ALIAS_SECTION (in_literal4, "literal4");		\
    ALIAS_SECTION (in_literal8, "literal8");		\
}
#endif

#undef	READONLY_DATA_SECTION
#define READONLY_DATA_SECTION const_section

#undef	SELECT_SECTION
#define SELECT_SECTION(exp,reloc,align)				\
  do								\
    {								\
      if (TREE_CODE (exp) == STRING_CST)			\
	{							\
	  if (flag_writable_strings)				\
	    data_section ();					\
	  else if (TREE_STRING_LENGTH (exp) !=			\
		   strlen (TREE_STRING_POINTER (exp)) + 1)	\
	    readonly_data_section ();				\
	  else							\
	    cstring_section ();					\
	}							\
      else if (TREE_CODE (exp) == INTEGER_CST			\
	       || TREE_CODE (exp) == REAL_CST)			\
        {							\
	  tree size = TYPE_SIZE (TREE_TYPE (exp));		\
	  							\
	  if (TREE_CODE (size) == INTEGER_CST &&		\
	      TREE_INT_CST_LOW (size) == 4 &&			\
	      TREE_INT_CST_HIGH (size) == 0)			\
	    literal4_section ();				\
	  else if (TREE_CODE (size) == INTEGER_CST &&		\
	      TREE_INT_CST_LOW (size) == 8 &&			\
	      TREE_INT_CST_HIGH (size) == 0)			\
	    literal8_section ();				\
	  else							\
	    readonly_data_section ();				\
	}							\
      else if (TREE_CODE (exp) == CONSTRUCTOR				\
	       && TREE_TYPE (exp)					\
	       && TREE_CODE (TREE_TYPE (exp)) == RECORD_TYPE		\
	       && TYPE_NAME (TREE_TYPE (exp)))				\
	{								\
	  tree name = TYPE_NAME (TREE_TYPE (exp));			\
	  if (TREE_CODE (name) == TYPE_DECL)				\
	    name = DECL_NAME (name);					\
	  if (!strcmp (IDENTIFIER_POINTER (name), "NSConstantString"))	\
	    objc_constant_string_object_section ();			\
	  else if (!strcmp (IDENTIFIER_POINTER (name), "NXConstantString")) \
	    objc_string_object_section ();				\
	  else if (TREE_READONLY (exp) || TREE_CONSTANT (exp))		\
	    {								\
	      if (TREE_SIDE_EFFECTS (exp) || flag_pic && reloc)		\
		const_data_section ();					\
	      else							\
		readonly_data_section (); 				\
            }								\
	  else								\
	    data_section ();						\
      }									\
      else if (TREE_CODE (exp) == VAR_DECL &&				\
	       DECL_NAME (exp) &&					\
	       TREE_CODE (DECL_NAME (exp)) == IDENTIFIER_NODE &&	\
	       IDENTIFIER_POINTER (DECL_NAME (exp)) &&			\
	       !strncmp (IDENTIFIER_POINTER (DECL_NAME (exp)), "_OBJC_", 6)) \
	{								\
	  const char *name = IDENTIFIER_POINTER (DECL_NAME (exp));	\
	  								\
	  if (!strncmp (name, "_OBJC_CLASS_METHODS_", 20))		\
	    objc_cls_meth_section ();					\
	  else if (!strncmp (name, "_OBJC_INSTANCE_METHODS_", 23))	\
	    objc_inst_meth_section ();					\
	  else if (!strncmp (name, "_OBJC_CATEGORY_CLASS_METHODS_", 20)) \
	    objc_cat_cls_meth_section ();				\
	  else if (!strncmp (name, "_OBJC_CATEGORY_INSTANCE_METHODS_", 23)) \
	    objc_cat_inst_meth_section ();				\
	  else if (!strncmp (name, "_OBJC_CLASS_VARIABLES_", 22))	\
	    objc_class_vars_section ();					\
	  else if (!strncmp (name, "_OBJC_INSTANCE_VARIABLES_", 25))	\
	    objc_instance_vars_section ();				\
	  else if (!strncmp (name, "_OBJC_CLASS_PROTOCOLS_", 22))	\
	    objc_cat_cls_meth_section ();				\
	  else if (!strncmp (name, "_OBJC_CLASS_NAME_", 17))		\
	    objc_class_names_section ();				\
	  else if (!strncmp (name, "_OBJC_METH_VAR_NAME_", 20))		\
	    objc_meth_var_names_section ();				\
	  else if (!strncmp (name, "_OBJC_METH_VAR_TYPE_", 20))		\
	    objc_meth_var_types_section ();				\
	  else if (!strncmp (name, "_OBJC_CLASS_REFERENCES", 22))	\
	    objc_cls_refs_section ();					\
	  else if (!strncmp (name, "_OBJC_CLASS_", 12))			\
	    objc_class_section ();					\
	  else if (!strncmp (name, "_OBJC_METACLASS_", 16))		\
	    objc_meta_class_section ();					\
	  else if (!strncmp (name, "_OBJC_CATEGORY_", 15))		\
	    objc_category_section ();					\
	  else if (!strncmp (name, "_OBJC_SELECTOR_REFERENCES", 25))	\
	    objc_selector_refs_section ();				\
	  else if (!strncmp (name, "_OBJC_SELECTOR_FIXUP", 20))		\
	    objc_selector_fixup_section ();				\
	  else if (!strncmp (name, "_OBJC_SYMBOLS", 13))		\
	    objc_symbols_section ();					\
	  else if (!strncmp (name, "_OBJC_MODULES", 13))		\
	    objc_module_info_section ();				\
	  else if (!strncmp (name, "_OBJC_PROTOCOL_INSTANCE_METHODS_", 32)) \
	    objc_cat_inst_meth_section ();                              \
	  else if (!strncmp (name, "_OBJC_PROTOCOL_CLASS_METHODS_", 29)) \
	    objc_cat_cls_meth_section ();                               \
	  else if (!strncmp (name, "_OBJC_PROTOCOL_REFS_", 20))         \
	    objc_cat_cls_meth_section ();                               \
	  else if (!strncmp (name, "_OBJC_PROTOCOL_", 15))              \
	    objc_protocol_section ();                                   \
	  else if ((TREE_READONLY (exp) || TREE_CONSTANT (exp))		\
		&& !TREE_SIDE_EFFECTS (exp))     			\
             { if (flag_pic && reloc ) const_data_section ();             \
               else readonly_data_section (); }                       	\
	  else								\
	    data_section ();						\
	}								\
      else if (TREE_READONLY (exp) || TREE_CONSTANT (exp))		\
	{								\
	  if (TREE_SIDE_EFFECTS (exp) || flag_pic && reloc)		\
	    const_data_section ();					\
	  else								\
	    readonly_data_section (); 					\
        }								\
      else								\
        data_section ();						\
      try_section_alias ();						\
    }									\
  while (0)

/* This can be called with address expressions as "rtx".
   They must go in "const". */
#undef	SELECT_RTX_SECTION
#define SELECT_RTX_SECTION(mode, rtx, align)				\
  do									\
    {									\
      if (GET_MODE_SIZE (mode) == 8)					\
	literal8_section ();						\
      else if (GET_MODE_SIZE (mode) == 4				\
	       && (GET_CODE (rtx) == CONST_INT				\
	           || GET_CODE (rtx) == CONST_DOUBLE))			\
	literal4_section ();						\
      else								\
	const_section ();						\
    }									\
  while (0)

#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");					\
	   assemble_global (NAME);					\
	 }								\
       } while (0)

#undef ASM_GLOBALIZE_LABEL
#define ASM_GLOBALIZE_LABEL(FILE,NAME)	\
 do { const char *const _x = (NAME); if (!!strncmp (_x, "_OBJC_", 6)) { \
  (fputs (".globl ", FILE), assemble_name (FILE, _x), fputs ("\n", FILE)); \
 }} while (0)

#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)

#define ENCODE_SECTION_INFO(DECL)  \
  darwin_encode_section_info (DECL)

/* Be conservative and always redo the encoding.  */

#define REDO_SECTION_INFO_P(DECL) (1)

#define STRIP_NAME_ENCODING(VAR,SYMBOL_NAME)  \
  ((VAR) = ((SYMBOL_NAME[0] == '!') ? (SYMBOL_NAME) + 4 : (SYMBOL_NAME)))

#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_ = (SYMBOL);				\
    char *buffer_ = (BUF);					\
    STRIP_NAME_ENCODING (symbol_, symbol_);  \
    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
  
#define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL)  \
  (((CODE) == 1 || (GLOBAL) == 0) ? DW_EH_PE_pcrel : DW_EH_PE_absptr)

#define 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)