[gcc.git] / gcc / config / i386 / freebsd.h

/* Definitions of target machine for GNU compiler for Intel 80386
   running FreeBSD.
   Copyright (C) 1988, 1992, 1994, 1996, 1997 Free Software Foundation, Inc.
   Contributed by Poul-Henning Kamp <phk@login.dkuug.dk>

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.  */

/* This goes away when the math-emulator is fixed */
#define TARGET_CPU_DEFAULT 0400		/* TARGET_NO_FANCY_MATH_387 */

/* This is tested by i386gas.h.  */
#define YES_UNDERSCORES

/* Don't assume anything about the header files. */
#define NO_IMPLICIT_EXTERN_C

#include "i386/gstabs.h"

/* Get perform_* macros to build libgcc.a.  */
#include "i386/perform.h"

#undef CPP_PREDEFINES
#define CPP_PREDEFINES "-Dunix -Di386 -D__FreeBSD__ -Asystem(unix) -Asystem(FreeBSD) -Acpu(i386) -Amachine(i386)"

/* Like the default, except no -lg.  */
#define LIB_SPEC "%{!shared:%{!pg:-lc}%{pg:-lc_p}}"

#undef SIZE_TYPE
#define SIZE_TYPE "unsigned int"

#undef PTRDIFF_TYPE
#define PTRDIFF_TYPE "int"

#undef WCHAR_TYPE
#define WCHAR_TYPE "int"

#define WCHAR_UNSIGNED 0

#undef WCHAR_TYPE_SIZE
#define WCHAR_TYPE_SIZE BITS_PER_WORD

#define HAVE_ATEXIT

/* Override the default comment-starter of "/".  */

#undef ASM_COMMENT_START
#define ASM_COMMENT_START "#"

#undef ASM_APP_ON
#define ASM_APP_ON "#APP\n"

#undef ASM_APP_OFF
#define ASM_APP_OFF "#NO_APP\n"

/* FreeBSD using a.out does not support DWARF2 unwinding mechanisms.  */
#define DWARF2_UNWIND_INFO 0
\f
/* 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

/* Don't default to pcc-struct-return, because gcc is the only compiler, and
   we want to retain compatibility with older gcc versions.  */
#define DEFAULT_PCC_STRUCT_RETURN 0
\f
/* i386 freebsd still uses old binutils that don't insert nops by default
   when the .align directive demands to insert extra space in the text
   segment.  */
#undef ASM_OUTPUT_ALIGN
#define ASM_OUTPUT_ALIGN(FILE,LOG) \
  if ((LOG)!=0) fprintf ((FILE), "\t.align %d,0x90\n", (LOG))
\f
/* 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, "\tleal %sP%d@GOTOFF(%%ebx),%%eax\n",		\
	       LPREFIX, (LABELNO));					\
      fprintf (FILE, "\tcall *mcount@GOT(%%ebx)\n");			\
    }									\
  else									\
    {									\
      fprintf (FILE, "\tmovl $%sP%d,%%eax\n", LPREFIX, (LABELNO));	\
      fprintf (FILE, "\tcall mcount\n");				\
    }									\
}

/*
 * Some imports from svr4.h in support of shared libraries.
 * Currently, we need the DECLARE_OBJECT_SIZE stuff.
 */

/* 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);					\
	fprintf (FILE, ",%d\n",  int_size_in_bytes (TREE_TYPE (DECL)));	\
      }									\
    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)                                     \
       {                                                                \
         fprintf (FILE, "\t%s\t ", SIZE_ASM_OP);                        \
	 assemble_name (FILE, name);                                    \
	 fprintf (FILE, ",%d\n",  int_size_in_bytes (TREE_TYPE (DECL)));\
	}								\
   } 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)

#define ASM_SPEC   " %| %{fpic:-k} %{fPIC:-k}"
#define LINK_SPEC \
  "%{p:%e`-p' not supported; use `-pg' and gprof(1)} \
   %{shared:-Bshareable} \
   %{!shared:%{!nostdlib:%{!r:%{!e*:-e start}}} -dc -dp %{static:-Bstatic} \
   %{pg:-Bstatic} %{Z}} \
   %{assert*} %{R*}"

#define STARTFILE_SPEC  \
  "%{shared:c++rt0.o%s} \
   %{!shared:%{pg:gcrt0.o%s}%{!pg:%{static:scrt0.o%s}%{!static:crt0.o%s}}}"

/* This is defined when gcc is compiled in the BSD-directory-tree, and must
 * make up for the gap to all the stuff done in the GNU-makefiles.
 */

#ifdef FREEBSD_NATIVE

#define INCLUDE_DEFAULTS { \
	{ "/usr/include", 0, 0, 0 }, \
	{ "/usr/include/g++", "G++", 1, 1 }, \
	{ 0, 0, 0, 0} \
	}

#undef MD_EXEC_PREFIX
#define MD_EXEC_PREFIX "/usr/libexec/"

#undef STANDARD_STARTFILE_PREFIX
#define STANDARD_STARTFILE_PREFIX "/usr/lib"

#if 0 /* This is very wrong!!! */
#define DEFAULT_TARGET_MACHINE "i386-unknown-freebsd_1.0"
#define GPLUSPLUS_INCLUDE_DIR "/usr/local/lib/gcc-lib/i386-unknown-freebsd_1.0/2.5.8/include"
#define TOOL_INCLUDE_DIR "/usr/local/i386-unknown-freebsd_1.0/include"
#define GCC_INCLUDE_DIR "/usr/local/lib/gcc-lib/i386-unknown-freebsd_1.0/2.5.8/include"
#endif

#endif /* FREEBSD_NATIVE */
Commit	Line	Data
0e3ce1df RK	1	/* Definitions of target machine for GNU compiler for Intel 80386
0e3ce1df RK	2	running FreeBSD.
e9a25f70	3	Copyright (C) 1988, 1992, 1994, 1996, 1997 Free Software Foundation, Inc.
0e3ce1df RK	4	Contributed by Poul-Henning Kamp <phk@login.dkuug.dk>
	5
	6	This file is part of GNU CC.
	7
	8	GNU CC is free software; you can redistribute it and/or modify
	9	it under the terms of the GNU General Public License as published by
	10	the Free Software Foundation; either version 2, or (at your option)
	11	any later version.
	12
	13	GNU CC is distributed in the hope that it will be useful,
	14	but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	GNU General Public License for more details.
	17
	18	You should have received a copy of the GNU General Public License
	19	along with GNU CC; see the file COPYING. If not, write to
97aadbb9 RK	20	the Free Software Foundation, 59 Temple Place - Suite 330,
97aadbb9 RK	21	Boston, MA 02111-1307, USA. */
0e3ce1df RK	22
	23	/* This goes away when the math-emulator is fixed */
	24	#define TARGET_CPU_DEFAULT 0400 /* TARGET_NO_FANCY_MATH_387 */
	25
	26	/* This is tested by i386gas.h. */
	27	#define YES_UNDERSCORES
	28
1486ce34 RK	29	/* Don't assume anything about the header files. */
	30	#define NO_IMPLICIT_EXTERN_C
	31
0e3ce1df RK	32	#include "i386/gstabs.h"
	33
	34	/* Get perform_* macros to build libgcc.a. */
	35	#include "i386/perform.h"
	36
	37	#undef CPP_PREDEFINES
56f28b73	38	#define CPP_PREDEFINES "-Dunix -Di386 -D__FreeBSD__ -Asystem(unix) -Asystem(FreeBSD) -Acpu(i386) -Amachine(i386)"
0e3ce1df	39
0e3ce1df	40	/* Like the default, except no -lg. */
1b7555bd	41	#define LIB_SPEC "%{!shared:%{!pg:-lc}%{pg:-lc_p}}"
0e3ce1df RK	42
	43	#undef SIZE_TYPE
	44	#define SIZE_TYPE "unsigned int"
	45
	46	#undef PTRDIFF_TYPE
	47	#define PTRDIFF_TYPE "int"
	48
	49	#undef WCHAR_TYPE
154f82c7	50	#define WCHAR_TYPE "int"
0e3ce1df	51
154f82c7	52	#define WCHAR_UNSIGNED 0
0e3ce1df RK	53
0e3ce1df RK	54	#undef WCHAR_TYPE_SIZE
154f82c7	55	#define WCHAR_TYPE_SIZE BITS_PER_WORD
0e3ce1df RK	56
	57	#define HAVE_ATEXIT
	58
6981eacf JL	59	/* Override the default comment-starter of "/". */
	60
	61	#undef ASM_COMMENT_START
	62	#define ASM_COMMENT_START "#"
	63
0e3ce1df RK	64	#undef ASM_APP_ON
	65	#define ASM_APP_ON "#APP\n"
	66
	67	#undef ASM_APP_OFF
	68	#define ASM_APP_OFF "#NO_APP\n"
56f28b73 JL	69
	70	/* FreeBSD using a.out does not support DWARF2 unwinding mechanisms. */
	71	#define DWARF2_UNWIND_INFO 0
0e3ce1df RK	72	\f
	73	/* The following macros are stolen from i386v4.h */
	74	/* These have to be defined to get PIC code correct */
	75
	76	/* This is how to output an element of a case-vector that is relative.
	77	This is only used for PIC code. See comments by the `casesi' insn in
	78	i386.md for an explanation of the expression this outputs. */
	79
	80	#undef ASM_OUTPUT_ADDR_DIFF_ELT
33f7f353	81	#define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, BODY, VALUE, REL) \
0e3ce1df RK	82	fprintf (FILE, "\t.long _GLOBAL_OFFSET_TABLE_+[.-%s%d]\n", LPREFIX, VALUE)
	83
	84	/* Indicate that jump tables go in the text section. This is
	85	necessary when compiling PIC code. */
	86
75197b37	87	#define JUMP_TABLES_IN_TEXT_SECTION 1
0e3ce1df RK	88
	89	/* Don't default to pcc-struct-return, because gcc is the only compiler, and
	90	we want to retain compatibility with older gcc versions. */
	91	#define DEFAULT_PCC_STRUCT_RETURN 0
1e22fa6f	92	\f
4bca6986 R	93	/* i386 freebsd still uses old binutils that don't insert nops by default
	94	when the .align directive demands to insert extra space in the text
	95	segment. */
	96	#undef ASM_OUTPUT_ALIGN
	97	#define ASM_OUTPUT_ALIGN(FILE,LOG) \
	98	if ((LOG)!=0) fprintf ((FILE), "\t.align %d,0x90\n", (LOG))
	99	\f
1e22fa6f RK	100	/* Profiling routines, partially copied from i386/osfrose.h. */
	101
	102	/* Redefine this to use %eax instead of %edx. */
	103	#undef FUNCTION_PROFILER
	104	#define FUNCTION_PROFILER(FILE, LABELNO) \
	105	{ \
	106	if (flag_pic) \
	107	{ \
	108	fprintf (FILE, "\tleal %sP%d@GOTOFF(%%ebx),%%eax\n", \
	109	LPREFIX, (LABELNO)); \
	110	fprintf (FILE, "\tcall *mcount@GOT(%%ebx)\n"); \
	111	} \
	112	else \
	113	{ \
	114	fprintf (FILE, "\tmovl $%sP%d,%%eax\n", LPREFIX, (LABELNO)); \
	115	fprintf (FILE, "\tcall mcount\n"); \
	116	} \
	117	}
0e3ce1df RK	118
	119	/*
	120	* Some imports from svr4.h in support of shared libraries.
	121	* Currently, we need the DECLARE_OBJECT_SIZE stuff.
	122	*/
	123
	124	/* Define the strings used for the special svr4 .type and .size directives.
	125	These strings generally do not vary from one system running svr4 to
	126	another, but if a given system (e.g. m88k running svr) needs to use
	127	different pseudo-op names for these, they may be overridden in the
	128	file which includes this one. */
	129
	130	#define TYPE_ASM_OP ".type"
	131	#define SIZE_ASM_OP ".size"
daefd78b	132
0e3ce1df RK	133	/* The following macro defines the format used to output the second
	134	operand of the .type assembler directive. Different svr4 assemblers
	135	expect various different forms for this operand. The one given here
	136	is just a default. You may need to override it in your machine-
	137	specific tm.h file (depending upon the particulars of your assembler). */
	138
	139	#define TYPE_OPERAND_FMT "@%s"
	140
	141	/* Write the extra assembler code needed to declare a function's result.
	142	Most svr4 assemblers don't require any special declaration of the
	143	result value, but there are exceptions. */
	144
	145	#ifndef ASM_DECLARE_RESULT
	146	#define ASM_DECLARE_RESULT(FILE, RESULT)
	147	#endif
	148
	149	/* These macros generate the special .type and .size directives which
	150	are used to set the corresponding fields of the linker symbol table
	151	entries in an ELF object file under SVR4. These macros also output
	152	the starting labels for the relevant functions/objects. */
	153
	154	/* Write the extra assembler code needed to declare a function properly.
	155	Some svr4 assemblers need to also have something extra said about the
	156	function's return value. We allow for that here. */
	157
	158	#define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
	159	do { \
	160	fprintf (FILE, "\t%s\t ", TYPE_ASM_OP); \
	161	assemble_name (FILE, NAME); \
	162	putc (',', FILE); \
	163	fprintf (FILE, TYPE_OPERAND_FMT, "function"); \
	164	putc ('\n', FILE); \
	165	ASM_DECLARE_RESULT (FILE, DECL_RESULT (DECL)); \
	166	ASM_OUTPUT_LABEL(FILE, NAME); \
	167	} while (0)
	168
	169	/* Write the extra assembler code needed to declare an object properly. */
	170
	171	#define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL) \
	172	do { \
	173	fprintf (FILE, "\t%s\t ", TYPE_ASM_OP); \
	174	assemble_name (FILE, NAME); \
	175	putc (',', FILE); \
	176	fprintf (FILE, TYPE_OPERAND_FMT, "object"); \
	177	putc ('\n', FILE); \
	178	size_directive_output = 0; \
	179	if (!flag_inhibit_size_directive && DECL_SIZE (DECL)) \
	180	{ \
	181	size_directive_output = 1; \
	182	fprintf (FILE, "\t%s\t ", SIZE_ASM_OP); \
	183	assemble_name (FILE, NAME); \
	184	fprintf (FILE, ",%d\n", int_size_in_bytes (TREE_TYPE (DECL))); \
	185	} \
	186	ASM_OUTPUT_LABEL(FILE, NAME); \
	187	} while (0)
	188
	189	/* Output the size directive for a decl in rest_of_decl_compilation
	190	in the case where we did not do so before the initializer.
	191	Once we find the error_mark_node, we know that the value of
	192	size_directive_output was set
	193	by ASM_DECLARE_OBJECT_NAME when it was run for the same decl. */
	194
	195	#define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP_LEVEL, AT_END) \
	196	do { \
197	char *name = XSTR (XEXP (DECL_RTL (DECL), 0), 0); \
198	if (!flag_inhibit_size_directive && DECL_SIZE (DECL) \
199	&& ! AT_END && TOP_LEVEL \
200	&& DECL_INITIAL (DECL) == error_mark_node \
201	&& !size_directive_output) \
202	{ \
203	fprintf (FILE, "\t%s\t ", SIZE_ASM_OP); \
204	assemble_name (FILE, name); \
205	fprintf (FILE, ",%d\n", int_size_in_bytes (TREE_TYPE (DECL)));\
206	} \
207	} while (0)
208
209
210	/* This is how to declare the size of a function. */
211
212	#define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL) \
213	do { \
214	if (!flag_inhibit_size_directive) \
215	{ \
216	char label[256]; \
217	static int labelno; \
218	labelno++; \
219	ASM_GENERATE_INTERNAL_LABEL (label, "Lfe", labelno); \
220	ASM_OUTPUT_INTERNAL_LABEL (FILE, "Lfe", labelno); \
221	fprintf (FILE, "\t%s\t ", SIZE_ASM_OP); \
222	assemble_name (FILE, (FNAME)); \
223	fprintf (FILE, ","); \
224	assemble_name (FILE, label); \
225	fprintf (FILE, "-"); \
226	assemble_name (FILE, (FNAME)); \
227	putc ('\n', FILE); \
228	} \
229	} while (0)
230
231	#define ASM_SPEC " %\| %{fpic:-k} %{fPIC:-k}"
232	#define LINK_SPEC \
1b7555bd OR	233	"%{p:%e`-p' not supported; use `-pg' and gprof(1)} \
	234	%{shared:-Bshareable} \
	235	%{!shared:%{!nostdlib:%{!r:%{!e*:-e start}}} -dc -dp %{static:-Bstatic} \
	236	%{pg:-Bstatic} %{Z}} \
	237	%{assert} %{R}"
	238
	239	#define STARTFILE_SPEC \
	240	"%{shared:c++rt0.o%s} \
	241	%{!shared:%{pg:gcrt0.o%s}%{!pg:%{static:scrt0.o%s}%{!static:crt0.o%s}}}"
0e3ce1df	242
0e3ce1df RK	243	/* This is defined when gcc is compiled in the BSD-directory-tree, and must
	244	* make up for the gap to all the stuff done in the GNU-makefiles.
	245	*/
	246
	247	#ifdef FREEBSD_NATIVE
	248
1e22fa6f	249	#define INCLUDE_DEFAULTS { \
e9a25f70 JL	250	{ "/usr/include", 0, 0, 0 }, \
	251	{ "/usr/include/g++", "G++", 1, 1 }, \
	252	{ 0, 0, 0, 0} \
1e22fa6f RK	253	}
1e22fa6f RK	254
0e3ce1df RK	255	#undef MD_EXEC_PREFIX
	256	#define MD_EXEC_PREFIX "/usr/libexec/"
	257
	258	#undef STANDARD_STARTFILE_PREFIX
	259	#define STANDARD_STARTFILE_PREFIX "/usr/lib"
	260
1e22fa6f	261	#if 0 /* This is very wrong!!! */
0e3ce1df RK	262	#define DEFAULT_TARGET_MACHINE "i386-unknown-freebsd_1.0"
	263	#define GPLUSPLUS_INCLUDE_DIR "/usr/local/lib/gcc-lib/i386-unknown-freebsd_1.0/2.5.8/include"
	264	#define TOOL_INCLUDE_DIR "/usr/local/i386-unknown-freebsd_1.0/include"
	265	#define GCC_INCLUDE_DIR "/usr/local/lib/gcc-lib/i386-unknown-freebsd_1.0/2.5.8/include"
1e22fa6f	266	#endif
0e3ce1df RK	267
0e3ce1df RK	268	#endif /* FREEBSD_NATIVE */