$NetBSD: patch-ag,v 1.1 1999/02/14 10:12:03 mrg Exp $

Index: gcc/config/i386/netbsd-elf.h
*** /dev/null	Sun Feb 14 16:47:33 1999
--- gcc/config/i386/netbsd-elf.h	Sun Feb 14 19:03:37 1999
***************
*** 0 ****
--- 1,597 ----
+ /* Definitions of target machine for GNU compiler,
+    for i386 NetBSD systems.
+    Copyright (C) 1998 Free Software Foundation, 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, 675 Mass Ave, Cambridge, MA 02139, USA.  */
+ 
+ /* This is used on i386 platforms that use the ELF format.
+    This was taken from the NetBSD/alpha configuration, and modified
+    for NetBSD/i386 by Christos Zoulas <christos@netbsd.org> */
+ 
+ /* Get generic i386 definitions. */
+ 
+ /* This goes away when the math-emulator is fixed */
+ #define TARGET_CPU_DEFAULT 0400		/* TARGET_NO_FANCY_MATH_387 */
+ 
+ #include <i386/gstabs.h>
+ 
+ /* Get perform_* macros to build libgcc.a.  */
+ #include <i386/perform.h>
+ 
+ /* Get generic NetBSD ELF definitions.  We will override these if necessary. */
+ 
+ #define NETBSD_ELF
+ #include <netbsd.h>
+ 
+ #define OBJECT_FORMAT_ELF
+ 
+ /* This is BSD, so it wants DBX format. */
+ 
+ #if 0
+ #define DBX_DEBUGGING_INFO
+ 
+ /* This is the char to use for continuation (in case we need to turn
+    continuation back on). */
+ 
+ #define DBX_CONTIN_CHAR '?'
+ #endif
+ 
+ #undef ASM_FINAL_SPEC
+ 
+ /* Names to predefine in the preprocessor for this target machine.
+    XXX NetBSD, by convention, shouldn't do __alpha, but lots of applications
+    expect it because that's what OSF/1 does. */
+ 
+ /* NetBSD Extension to GNU C: __KPRINTF_ATTRIBUTE__ */
+ 
+ #undef CPP_PREDEFINES
+ #define CPP_PREDEFINES "\
+ -Di386 -D__NetBSD__ -D__ELF__ -D__KPRINTF_ATTRIBUTE__ \
+ -Asystem(unix) -Asystem(NetBSD) -Acpu(i386) -Amachine(i386)"
+ 
+ /* Make gcc agree with <machine/ansi.h> */
+ 
+ #undef SIZE_TYPE
+ #define SIZE_TYPE "unsigned int"
+ 
+ #undef PTRDIFF_TYPE
+ #define PTRDIFF_TYPE "int"
+ 
+ #undef WCHAR_TYPE
+ #define WCHAR_TYPE "int"
+ 
+ #undef WCHAR_UNSIGNED
+ #define WCHAR_UNSIGNED 0
+ 
+ #undef WCHAR_TYPE_SIZE
+ #define WCHAR_TYPE_SIZE 32
+ 
+ /* Output assembler code to FILE to increment profiler label # LABELNO
+    for profiling a function entry.  Under NetBSD/i386, the assembler does
+    nothing special with -pg. */
+ 
+ #undef ASM_APP_ON
+ #define ASM_APP_ON "#APP\n"
+ 
+ #undef ASM_APP_OFF
+ #define ASM_APP_OFF "#NO_APP\n"
+ 
+ #define bsd4_4
+ #undef HAS_INIT_SECTION
+ 
+ #undef ASM_FILE_START
+ #define ASM_FILE_START(FILE)					\
+ {								\
+   output_file_directive (FILE, main_input_filename);		\
+   fprintf (FILE, "\t.version\t\"01.01\"\n");			\
+ }
+ 
+ /* Provide a LINK_SPEC appropriate for a NetBSD/alpha ELF target.  Only
+    the linker emulation is i386-specific.  The rest are
+    common to all ELF targets, except for the name of the start function. */
+ 
+ #undef LINK_SPEC
+ #define LINK_SPEC \
+  "-m elf_i386 \
+   %{assert*} %{R*} \
+   %{shared:-shared} \
+   %{!shared: \
+     -dc -dp \
+     %{!nostdlib:%{!r*:%{!e*:-e __start}}} \
+     %{!static: \
+       %{rdynamic:-export-dynamic} \
+       %{!dynamic-linker:-dynamic-linker /usr/libexec/ld.elf_so}} \
+     %{static:-static}}"
+ 
+ #undef DEFAULT_VTABLE_THUNKS
+ #define DEFAULT_VTABLE_THUNKS 1
+ 
+ /* Attach a special .ident directive to the end of the file to identify
+    the version of GCC which compiled this code.  The format of the
+    .ident string is patterned after the ones produced by native svr4
+    C compilers.  */
+ 
+ /* Output #ident as a .ident.  */
+ 
+ /* This is how to allocate empty space in some section.  The .zero
+    pseudo-op is used for this on most svr4 assemblers.  */
+ #undef SKIP_ASM_OP
+ #define SKIP_ASM_OP	"\t.zero"
+ 
+ #undef ASM_OUTPUT_SKIP
+ #define ASM_OUTPUT_SKIP(FILE,SIZE) \
+   fprintf (FILE, "\t%s\t%u\n", SKIP_ASM_OP, (SIZE))
+ 
+ /* Output the label which precedes a jumptable.  Note that for all svr4
+    systems where we actually generate jumptables (which is to say every
+    svr4 target except i386, where we use casesi instead) we put the jump-
+    tables into the .rodata section and since other stuff could have been
+    put into the .rodata section prior to any given jumptable, we have to
+    make sure that the location counter for the .rodata section gets pro-
+    perly re-aligned prior to the actual beginning of the jump table.  */
+ 
+ #define ALIGN_ASM_OP ".align"
+ 
+ #ifndef ASM_OUTPUT_BEFORE_CASE_LABEL
+ #define ASM_OUTPUT_BEFORE_CASE_LABEL(FILE,PREFIX,NUM,TABLE) \
+   ASM_OUTPUT_ALIGN ((FILE), 2);
+ #endif
+ 
+ #undef ASM_OUTPUT_CASE_LABEL
+ #define ASM_OUTPUT_CASE_LABEL(FILE,PREFIX,NUM,JUMPTABLE)		\
+   do {									\
+     ASM_OUTPUT_BEFORE_CASE_LABEL (FILE, PREFIX, NUM, JUMPTABLE)		\
+     ASM_OUTPUT_INTERNAL_LABEL (FILE, PREFIX, NUM);			\
+   } while (0)
+ 
+ /* The standard SVR4 assembler seems to require that certain builtin
+    library routines (e.g. .udiv) be explicitly declared as .globl
+    in each assembly file where they are referenced.  */
+ 
+ #define ASM_OUTPUT_EXTERNAL_LIBCALL(FILE, FUN)				\
+   ASM_GLOBALIZE_LABEL (FILE, XSTR (FUN, 0))
+ 
+ /* This says how to output assembler code to declare an
+    uninitialized external linkage data object.  Under SVR4,
+    the linker seems to want the alignment of data objects
+    to depend on their types.  We do exactly that here.  */
+ 
+ #define COMMON_ASM_OP	".comm"
+ 
+ #undef ASM_OUTPUT_ALIGN
+ #define ASM_OUTPUT_ALIGN(FILE,LOG) \
+   if ((LOG)!=0) fprintf ((FILE), "\t.align %d\n", 1 << (LOG))
+ 
+ #undef ASM_OUTPUT_ALIGNED_COMMON
+ #define ASM_OUTPUT_ALIGNED_COMMON(FILE, NAME, SIZE, ALIGN)		\
+ do {									\
+   fprintf ((FILE), "\t%s\t", COMMON_ASM_OP);				\
+   assemble_name ((FILE), (NAME));					\
+   fprintf ((FILE), ",%u,%u\n", (SIZE), (ALIGN) / BITS_PER_UNIT);	\
+ } while (0)
+ 
+ /* This says how to output assembler code to declare an
+    uninitialized internal linkage data object.  Under SVR4,
+    the linker seems to want the alignment of data objects
+    to depend on their types.  We do exactly that here.  */
+ 
+ #define LOCAL_ASM_OP	".local"
+ 
+ #undef ASM_OUTPUT_ALIGNED_LOCAL
+ #define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN)		\
+ do {									\
+   fprintf ((FILE), "\t%s\t", LOCAL_ASM_OP);				\
+   assemble_name ((FILE), (NAME));					\
+   fprintf ((FILE), "\n");						\
+   ASM_OUTPUT_ALIGNED_COMMON (FILE, NAME, SIZE, ALIGN);			\
+ } while (0)
+ 
+ /* This is the pseudo-op used to generate a 32-bit word of data with a
+    specific value in some section.  */
+ 
+ #define INT_ASM_OP		".long"
+ 
+ /* This is the pseudo-op used to generate a contiguous sequence of byte
+    values from a double-quoted string WITHOUT HAVING A TERMINATING NUL
+    AUTOMATICALLY APPENDED.  This is the same for most svr4 assemblers.  */
+ 
+ #undef ASCII_DATA_ASM_OP
+ #define ASCII_DATA_ASM_OP	".ascii"
+ 
+ /* Support const sections and the ctors and dtors sections for g++.
+    Note that there appears to be two different ways to support const
+    sections at the moment.  You can either #define the symbol
+    READONLY_DATA_SECTION (giving it some code which switches to the
+    readonly data section) or else you can #define the symbols
+    EXTRA_SECTIONS, EXTRA_SECTION_FUNCTIONS, SELECT_SECTION, and
+    SELECT_RTX_SECTION.  We do both here just to be on the safe side.  */
+ 
+ #define USE_CONST_SECTION	1
+ 
+ #define CONST_SECTION_ASM_OP	".section\t.rodata"
+ 
+ /* Define the pseudo-ops used to switch to the .ctors and .dtors sections.
+ 
+    Note that we want to give these sections the SHF_WRITE attribute
+    because these sections will actually contain data (i.e. tables of
+    addresses of functions in the current root executable or shared library
+    file) and, in the case of a shared library, the relocatable addresses
+    will have to be properly resolved/relocated (and then written into) by
+    the dynamic linker when it actually attaches the given shared library
+    to the executing process.  (Note that on SVR4, you may wish to use the
+    `-z text' option to the ELF linker, when building a shared library, as
+    an additional check that you are doing everything right.  But if you do
+    use the `-z text' option when building a shared library, you will get
+    errors unless the .ctors and .dtors sections are marked as writable
+    via the SHF_WRITE attribute.)  */
+ 
+ #define CTORS_SECTION_ASM_OP	".section\t.ctors,\"aw\""
+ #define DTORS_SECTION_ASM_OP	".section\t.dtors,\"aw\""
+ 
+ /* On svr4, we *do* have support for the .init and .fini sections, and we
+    can put stuff in there to be executed before and after `main'.  We let
+    crtstuff.c and other files know this by defining the following symbols.
+    The definitions say how to change sections to the .init and .fini
+    sections.  This is the same for all known svr4 assemblers.  */
+ 
+ #define INIT_SECTION_ASM_OP	".section\t.init"
+ #define FINI_SECTION_ASM_OP	".section\t.fini"
+ 
+ /* A default list of other sections which we might be "in" at any given
+    time.  For targets that use additional sections (e.g. .tdesc) you
+    should override this definition in the target-specific file which
+    includes this file.  */
+ 
+ #undef EXTRA_SECTIONS
+ #define EXTRA_SECTIONS in_const, in_ctors, in_dtors
+ 
+ /* A default list of extra section function definitions.  For targets
+    that use additional sections (e.g. .tdesc) you should override this
+    definition in the target-specific file which includes this file.  */
+ 
+ #undef EXTRA_SECTION_FUNCTIONS
+ #define EXTRA_SECTION_FUNCTIONS						\
+   CONST_SECTION_FUNCTION						\
+   CTORS_SECTION_FUNCTION						\
+   DTORS_SECTION_FUNCTION
+ 
+ #undef READONLY_DATA_SECTION
+ #define READONLY_DATA_SECTION() const_section ()
+ 
+ extern void text_section ();
+ 
+ #define CONST_SECTION_FUNCTION						\
+ void									\
+ const_section ()							\
+ {									\
+   if (!USE_CONST_SECTION)						\
+     text_section();							\
+   else if (in_section != in_const)					\
+     {									\
+       fprintf (asm_out_file, "%s\n", CONST_SECTION_ASM_OP);		\
+       in_section = in_const;						\
+     }									\
+ }
+ 
+ #define CTORS_SECTION_FUNCTION						\
+ void									\
+ ctors_section ()							\
+ {									\
+   if (in_section != in_ctors)						\
+     {									\
+       fprintf (asm_out_file, "%s\n", CTORS_SECTION_ASM_OP);		\
+       in_section = in_ctors;						\
+     }									\
+ }
+ 
+ #define DTORS_SECTION_FUNCTION						\
+ void									\
+ dtors_section ()							\
+ {									\
+   if (in_section != in_dtors)						\
+     {									\
+       fprintf (asm_out_file, "%s\n", DTORS_SECTION_ASM_OP);		\
+       in_section = in_dtors;						\
+     }									\
+ }
+ 
+ /* Switch into a generic section.
+    This is currently only used to support section attributes.
+ 
+    We make the section read-only and executable for a function decl,
+    read-only for a const data decl, and writable for a non-const data decl.  */
+ #define ASM_OUTPUT_SECTION_NAME(FILE, DECL, NAME, RELOC) \
+   fprintf (FILE, ".section\t%s,\"%s\",@progbits\n", NAME, \
+ 	   (DECL) && TREE_CODE (DECL) == FUNCTION_DECL ? "ax" : \
+ 	   (DECL) && DECL_READONLY_SECTION (DECL, RELOC) ? "a" : "aw")
+ 
+ 
+ /* A C statement (sans semicolon) to output an element in the table of
+    global constructors.  */
+ #define ASM_OUTPUT_CONSTRUCTOR(FILE,NAME)				\
+   do {									\
+     ctors_section ();							\
+     fprintf (FILE, "\t%s\t ", INT_ASM_OP);				\
+     assemble_name (FILE, NAME);						\
+     fprintf (FILE, "\n");						\
+   } while (0)
+ 
+ /* A C statement (sans semicolon) to output an element in the table of
+    global destructors.  */
+ #define ASM_OUTPUT_DESTRUCTOR(FILE,NAME)       				\
+   do {									\
+     dtors_section ();                   				\
+     fprintf (FILE, "\t%s\t ", INT_ASM_OP);				\
+     assemble_name (FILE, NAME);              				\
+     fprintf (FILE, "\n");						\
+   } while (0)
+ 
+ /* A C statement or statements to switch to the appropriate
+    section for output of DECL.  DECL is either a `VAR_DECL' node
+    or a constant of some sort.  RELOC indicates whether forming
+    the initial value of DECL requires link-time relocations.  */
+ 
+ #define SELECT_SECTION(DECL,RELOC)					\
+ {									\
+   if (TREE_CODE (DECL) == STRING_CST)					\
+     {									\
+       if (! flag_writable_strings)					\
+ 	const_section ();						\
+       else								\
+ 	data_section ();						\
+     }									\
+   else if (TREE_CODE (DECL) == VAR_DECL)				\
+     {									\
+       if ((flag_pic && RELOC)						\
+ 	  || !TREE_READONLY (DECL) || TREE_SIDE_EFFECTS (DECL)		\
+ 	  || !DECL_INITIAL (DECL)					\
+ 	  || (DECL_INITIAL (DECL) != error_mark_node			\
+ 	      && !TREE_CONSTANT (DECL_INITIAL (DECL))))			\
+ 	data_section ();						\
+       else								\
+ 	const_section ();						\
+     }									\
+   else									\
+     const_section ();							\
+ }
+ 
+ /* A C statement or statements to switch to the appropriate
+    section for output of RTX in mode MODE.  RTX is some kind
+    of constant in RTL.  The argument MODE is redundant except
+    in the case of a `const_int' rtx.  Currently, these always
+    go into the const section.  */
+ 
+ #undef SELECT_RTX_SECTION
+ #define SELECT_RTX_SECTION(MODE,RTX) const_section()
+ 
+ /* Define the strings used for the special svr4 .type and .size directives.
+    These strings generally do not vary from one system running svr4 to
+    another, but if a given system (e.g. m88k running svr) needs to use
+    different pseudo-op names for these, they may be overridden in the
+    file which includes this one.  */
+ 
+ #define TYPE_ASM_OP	".type"
+ #define SIZE_ASM_OP	".size"
+ 
+ /* The following macro defines the format used to output the second
+    operand of the .type assembler directive.  Different svr4 assemblers
+    expect various different forms for this operand.  The one given here
+    is just a default.  You may need to override it in your machine-
+    specific tm.h file (depending upon the particulars of your assembler).  */
+ 
+ #define TYPE_OPERAND_FMT	"@%s"
+ 
+ /* Write the extra assembler code needed to declare a function's result.
+    Most svr4 assemblers don't require any special declaration of the
+    result value, but there are exceptions.  */
+ 
+ #ifndef ASM_DECLARE_RESULT
+ #define ASM_DECLARE_RESULT(FILE, RESULT)
+ #endif
+ 
+ /* These macros generate the special .type and .size directives which
+    are used to set the corresponding fields of the linker symbol table
+    entries in an ELF object file under SVR4.  These macros also output
+    the starting labels for the relevant functions/objects.  */
+ 
+ /* Write the extra assembler code needed to declare a function properly.
+    Some svr4 assemblers need to also have something extra said about the
+    function's return value.  We allow for that here.  */
+ 
+ #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL)			\
+   do {									\
+     fprintf (FILE, "\t%s\t ", TYPE_ASM_OP);				\
+     assemble_name (FILE, NAME);						\
+     putc (',', FILE);							\
+     fprintf (FILE, TYPE_OPERAND_FMT, "function");			\
+     putc ('\n', FILE);							\
+     ASM_DECLARE_RESULT (FILE, DECL_RESULT (DECL));			\
+     ASM_OUTPUT_LABEL(FILE, NAME);					\
+   } while (0)
+ 
+ /* Write the extra assembler code needed to declare an object properly.  */
+ 
+ #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL)			\
+   do {									\
+     fprintf (FILE, "\t%s\t ", TYPE_ASM_OP);				\
+     assemble_name (FILE, NAME);						\
+     putc (',', FILE);							\
+     fprintf (FILE, TYPE_OPERAND_FMT, "object");				\
+     putc ('\n', FILE);							\
+     size_directive_output = 0;						\
+     if (!flag_inhibit_size_directive && DECL_SIZE (DECL))		\
+       {									\
+ 	size_directive_output = 1;					\
+ 	fprintf (FILE, "\t%s\t ", SIZE_ASM_OP);				\
+ 	assemble_name (FILE, NAME);					\
+ 	putc (',', FILE);						\
+ 	fprintf (FILE, HOST_WIDE_INT_PRINT_DEC,				\
+ 		 int_size_in_bytes (TREE_TYPE (DECL)));			\
+ 	fputc ('\n', FILE);						\
+       }									\
+     ASM_OUTPUT_LABEL(FILE, NAME);					\
+   } while (0)
+ 
+ /* Output the size directive for a decl in rest_of_decl_compilation
+    in the case where we did not do so before the initializer.
+    Once we find the error_mark_node, we know that the value of
+    size_directive_output was set
+    by ASM_DECLARE_OBJECT_NAME when it was run for the same decl.  */
+ 
+ #define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP_LEVEL, AT_END)	 \
+ do {									 \
+      char *name = XSTR (XEXP (DECL_RTL (DECL), 0), 0);			 \
+      if (!flag_inhibit_size_directive && DECL_SIZE (DECL)		 \
+          && ! AT_END && TOP_LEVEL					 \
+ 	 && DECL_INITIAL (DECL) == error_mark_node			 \
+ 	 && !size_directive_output)					 \
+        {								 \
+ 	 size_directive_output = 1;					 \
+ 	 fprintf (FILE, "\t%s\t ", SIZE_ASM_OP);			 \
+ 	 assemble_name (FILE, name);					 \
+ 	 putc (',', FILE);						 \
+ 	 fprintf (FILE, HOST_WIDE_INT_PRINT_DEC,			 \
+ 		  int_size_in_bytes (TREE_TYPE (DECL))); 		 \
+ 	fputc ('\n', FILE);						 \
+        }								 \
+    } while (0)
+ 
+ /* This is how to declare the size of a function.  */
+ 
+ #define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL)			\
+   do {									\
+     if (!flag_inhibit_size_directive)					\
+       {									\
+         char label[256];						\
+ 	static int labelno;						\
+ 	labelno++;							\
+ 	ASM_GENERATE_INTERNAL_LABEL (label, "Lfe", labelno);		\
+ 	ASM_OUTPUT_INTERNAL_LABEL (FILE, "Lfe", labelno);		\
+ 	fprintf (FILE, "\t%s\t ", SIZE_ASM_OP);				\
+ 	assemble_name (FILE, (FNAME));					\
+         fprintf (FILE, ",");						\
+ 	assemble_name (FILE, label);					\
+         fprintf (FILE, "-");						\
+ 	assemble_name (FILE, (FNAME));					\
+ 	putc ('\n', FILE);						\
+       }									\
+   } while (0)
+ 
+ /* This is how we tell the assembler that two symbols have the same value.  */
+ 
+ #define ASM_OUTPUT_DEF(FILE,NAME1,NAME2) \
+   do { assemble_name(FILE, NAME1); 	 \
+        fputs(" = ", FILE);		 \
+        assemble_name(FILE, NAME2);	 \
+        fputc('\n', FILE); } while (0)
+ 
+ /* A table of bytes codes used by the ASM_OUTPUT_ASCII and
+    ASM_OUTPUT_LIMITED_STRING macros.  Each byte in the table
+    corresponds to a particular byte value [0..255].  For any
+    given byte value, if the value in the corresponding table
+    position is zero, the given character can be output directly.
+    If the table value is 1, the byte must be output as a \ooo
+    octal escape.  If the tables value is anything else, then the
+    byte value should be output as a \ followed by the value
+    in the table.  Note that we can use standard UN*X escape
+    sequences for many control characters, but we don't use
+    \a to represent BEL because some svr4 assemblers (e.g. on
+    the i386) don't know about that.  Also, we don't use \v
+    since some versions of gas, such as 2.2 did not accept it.  */
+ 
+ #define ESCAPES \
+ "\1\1\1\1\1\1\1\1btn\1fr\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\
+ \0\0\"\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\
+ \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\\\0\0\0\
+ \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\1\
+ \1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\
+ \1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\
+ \1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\
+ \1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1"
+ 
+ /* Some svr4 assemblers have a limit on the number of characters which
+    can appear in the operand of a .string directive.  If your assembler
+    has such a limitation, you should define STRING_LIMIT to reflect that
+    limit.  Note that at least some svr4 assemblers have a limit on the
+    actual number of bytes in the double-quoted string, and that they
+    count each character in an escape sequence as one byte.  Thus, an
+    escape sequence like \377 would count as four bytes.
+ 
+    If your target assembler doesn't support the .string directive, you
+    should define this to zero.
+ */
+ 
+ #define STRING_LIMIT	((unsigned) 256)
+ 
+ #define STRING_ASM_OP	".string"
+ 
+ /*
+  * We always use gas here, so we don't worry about ECOFF assembler problems.
+  */
+ #undef TARGET_GAS
+ #define TARGET_GAS	(1)
+ 
+ #if 0
+ #undef PREFERRED_DEBUGGING_TYPE
+ #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
+ #endif
+ 
+ /* The following macros are stolen from i386v4.h */
+ /* These have to be defined to get PIC code correct */
+ 
+ /* This is how to output an element of a case-vector that is relative.
+    This is only used for PIC code.  See comments by the `casesi' insn in
+    i386.md for an explanation of the expression this outputs. */
+ 
+ #undef ASM_OUTPUT_ADDR_DIFF_ELT
+ #define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, BODY, VALUE, REL) \
+   fprintf (FILE, "\t.long _GLOBAL_OFFSET_TABLE_+[.-%s%d]\n", LPREFIX, VALUE)
+ 
+ /* Indicate that jump tables go in the text section.  This is
+    necessary when compiling PIC code.  */
+ 
+ #define JUMP_TABLES_IN_TEXT_SECTION 1
+ 
+ /* Default to pcc-struct-return, because this is the ELF abi and
+    we don't care about compatibility with older gcc versions.  */
+ #define DEFAULT_PCC_STRUCT_RETURN 1
+ 
+ /* Profiling routines, partially copied from i386/osfrose.h.  */
+ 
+ /* Redefine this to use %eax instead of %edx.  */
+ #undef FUNCTION_PROFILER
+ #define FUNCTION_PROFILER(FILE, LABELNO)  \
+ {									\
+   if (flag_pic)								\
+     {									\
+       fprintf (FILE, "\tcall mcount@PLT\n");				\
+     }									\
+   else									\
+     {									\
+       fprintf (FILE, "\tcall mcount\n");				\
+     }									\
+ }
+ 
+ /* Put relocations in the constant pool in the writable data section.  */
+ #undef SELECT_RTX_SECTION
+ #define SELECT_RTX_SECTION(MODE,RTX)					\
+ {									\
+   if (flag_pic && symbolic_operand (RTX))				\
+     data_section ();							\
+   else									\
+     readonly_data_section ();						\
+ }
