freebsd.h revision 18337 
1/* Definitions of target machine for GNU compiler for Intel 80386
2   running FreeBSD.
3   Copyright (C) 1988, 1992, 1994 Free Software Foundation, Inc.
4   Contributed by Poul-Henning Kamp <phk@login.dkuug.dk>
5
6This file is part of GNU CC.
7
8GNU CC is free software; you can redistribute it and/or modify
9it under the terms of the GNU General Public License as published by
10the Free Software Foundation; either version 2, or (at your option)
11any later version.
12
13GNU CC is distributed in the hope that it will be useful,
14but WITHOUT ANY WARRANTY; without even the implied warranty of
15MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16GNU General Public License for more details.
17
18You should have received a copy of the GNU General Public License
19along with GNU CC; see the file COPYING.  If not, write to
20the Free Software Foundation, 59 Temple Place - Suite 330,
21Boston, MA 02111-1307, USA.  */
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
29/* Don't assume anything about the header files. */
30#define NO_IMPLICIT_EXTERN_C
31
32#include "i386/gstabs.h"
33
34/* Get perform_* macros to build libgcc.a.  */
35#include "i386/perform.h"
36
37#undef CPP_PREDEFINES
38#define CPP_PREDEFINES "-Dunix -Di386 -D__FreeBSD__ -D__386BSD__ -Asystem(unix) -Asystem(FreeBSD) -Acpu(i386) -Amachine(i386)"
39
40/* Like the default, except no -lg.  */
41#define LIB_SPEC "%{!p:%{!pg:-lc}}%{p:-lc_p}%{pg:-lc_p}"
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
50#define WCHAR_TYPE "short unsigned int"
51
52#define WCHAR_UNSIGNED 1
53
54#undef WCHAR_TYPE_SIZE
55#define WCHAR_TYPE_SIZE 16
56
57#define HAVE_ATEXIT
58
59/* There are conflicting reports about whether this system uses
60   a different assembler syntax.  wilson@cygnus.com says # is right.  */
61#undef COMMENT_BEGIN
62#define COMMENT_BEGIN "#"
63
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"
69
70/* The following macros are stolen from i386v4.h */
71/* These have to be defined to get PIC code correct */
72
73/* This is how to output an element of a case-vector that is relative.
74   This is only used for PIC code.  See comments by the `casesi' insn in
75   i386.md for an explanation of the expression this outputs. */
76
77#undef ASM_OUTPUT_ADDR_DIFF_ELT
78#define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, VALUE, REL) \
79  fprintf (FILE, "\t.long _GLOBAL_OFFSET_TABLE_+[.-%s%d]\n", LPREFIX, VALUE)
80
81/* Indicate that jump tables go in the text section.  This is
82   necessary when compiling PIC code.  */
83
84#define JUMP_TABLES_IN_TEXT_SECTION
85
86/* Don't default to pcc-struct-return, because gcc is the only compiler, and
87   we want to retain compatibility with older gcc versions.  */
88#define DEFAULT_PCC_STRUCT_RETURN 0
89
90/* Profiling routines, partially copied from i386/osfrose.h.  */
91
92/* Redefine this to use %eax instead of %edx.  */
93#undef FUNCTION_PROFILER
94#define FUNCTION_PROFILER(FILE, LABELNO)  \
95{									\
96  if (flag_pic)								\
97    {									\
98      fprintf (FILE, "\tleal %sP%d@GOTOFF(%%ebx),%%eax\n",		\
99	       LPREFIX, (LABELNO));					\
100      fprintf (FILE, "\tcall *mcount@GOT(%%ebx)\n");			\
101    }									\
102  else									\
103    {									\
104      fprintf (FILE, "\tmovl $%sP%d,%%eax\n", LPREFIX, (LABELNO));	\
105      fprintf (FILE, "\tcall mcount\n");				\
106    }									\
107}
108
109/*
110 * Some imports from svr4.h in support of shared libraries.
111 * Currently, we need the DECLARE_OBJECT_SIZE stuff.
112 */
113
114/* Define the strings used for the special svr4 .type and .size directives.
115   These strings generally do not vary from one system running svr4 to
116   another, but if a given system (e.g. m88k running svr) needs to use
117   different pseudo-op names for these, they may be overridden in the
118   file which includes this one.  */
119
120#define TYPE_ASM_OP	".type"
121#define SIZE_ASM_OP	".size"
122
123/* The following macro defines the format used to output the second
124   operand of the .type assembler directive.  Different svr4 assemblers
125   expect various different forms for this operand.  The one given here
126   is just a default.  You may need to override it in your machine-
127   specific tm.h file (depending upon the particulars of your assembler).  */
128
129#define TYPE_OPERAND_FMT	"@%s"
130
131/* Write the extra assembler code needed to declare a function's result.
132   Most svr4 assemblers don't require any special declaration of the
133   result value, but there are exceptions.  */
134
135#ifndef ASM_DECLARE_RESULT
136#define ASM_DECLARE_RESULT(FILE, RESULT)
137#endif
138
139/* These macros generate the special .type and .size directives which
140   are used to set the corresponding fields of the linker symbol table
141   entries in an ELF object file under SVR4.  These macros also output
142   the starting labels for the relevant functions/objects.  */
143
144/* Write the extra assembler code needed to declare a function properly.
145   Some svr4 assemblers need to also have something extra said about the
146   function's return value.  We allow for that here.  */
147
148#define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL)			\
149  do {									\
150    fprintf (FILE, "\t%s\t ", TYPE_ASM_OP);				\
151    assemble_name (FILE, NAME);						\
152    putc (',', FILE);							\
153    fprintf (FILE, TYPE_OPERAND_FMT, "function");			\
154    putc ('\n', FILE);							\
155    ASM_DECLARE_RESULT (FILE, DECL_RESULT (DECL));			\
156    ASM_OUTPUT_LABEL(FILE, NAME);					\
157  } while (0)
158
159/* Write the extra assembler code needed to declare an object properly.  */
160
161#define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL)			\
162  do {									\
163    fprintf (FILE, "\t%s\t ", TYPE_ASM_OP);				\
164    assemble_name (FILE, NAME);						\
165    putc (',', FILE);							\
166    fprintf (FILE, TYPE_OPERAND_FMT, "object");				\
167    putc ('\n', FILE);							\
168    size_directive_output = 0;						\
169    if (!flag_inhibit_size_directive && DECL_SIZE (DECL))		\
170      {									\
171        size_directive_output = 1;					\
172	fprintf (FILE, "\t%s\t ", SIZE_ASM_OP);				\
173	assemble_name (FILE, NAME);					\
174	fprintf (FILE, ",%d\n",  int_size_in_bytes (TREE_TYPE (DECL)));	\
175      }									\
176    ASM_OUTPUT_LABEL(FILE, NAME);					\
177  } while (0)
178
179/* Output the size directive for a decl in rest_of_decl_compilation
180   in the case where we did not do so before the initializer.
181   Once we find the error_mark_node, we know that the value of
182   size_directive_output was set
183   by ASM_DECLARE_OBJECT_NAME when it was run for the same decl.  */
184
185#define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP_LEVEL, AT_END)        \
186do {                                                                    \
187     char *name = XSTR (XEXP (DECL_RTL (DECL), 0), 0);                  \
188     if (!flag_inhibit_size_directive && DECL_SIZE (DECL)	        \
189         && ! AT_END && TOP_LEVEL                                       \
190         && DECL_INITIAL (DECL) == error_mark_node                      \
191         && !size_directive_output)                                     \
192       {                                                                \
193         fprintf (FILE, "\t%s\t ", SIZE_ASM_OP);                        \
194	 assemble_name (FILE, name);                                    \
195	 fprintf (FILE, ",%d\n",  int_size_in_bytes (TREE_TYPE (DECL)));\
196	}								\
197   } while (0)
198
199
200/* This is how to declare the size of a function.  */
201
202#define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL)			\
203  do {									\
204    if (!flag_inhibit_size_directive)					\
205      {									\
206        char label[256];						\
207	static int labelno;						\
208	labelno++;							\
209	ASM_GENERATE_INTERNAL_LABEL (label, "Lfe", labelno);		\
210	ASM_OUTPUT_INTERNAL_LABEL (FILE, "Lfe", labelno);		\
211	fprintf (FILE, "\t%s\t ", SIZE_ASM_OP);				\
212	assemble_name (FILE, (FNAME));					\
213        fprintf (FILE, ",");						\
214	assemble_name (FILE, label);					\
215        fprintf (FILE, "-");						\
216	assemble_name (FILE, (FNAME));					\
217	putc ('\n', FILE);						\
218      }									\
219  } while (0)
220
221#define ASM_SPEC   " %| %{fpic:-k} %{fPIC:-k}"
222#define LINK_SPEC \
223  "%{!nostdlib:%{!r*:%{!e*:-e start}}} -dc -dp %{static:-Bstatic} %{assert*}"
224
225/* This is defined when gcc is compiled in the BSD-directory-tree, and must
226 * make up for the gap to all the stuff done in the GNU-makefiles.
227 */
228
229#ifdef FREEBSD_NATIVE
230
231#define INCLUDE_DEFAULTS { \
232	{ "/usr/include", 0 }, \
233	{ "/usr/include/g++", 1 }, \
234	{ 0, 0} \
235	}
236
237#undef MD_EXEC_PREFIX
238#define MD_EXEC_PREFIX "/usr/libexec/"
239
240#undef STANDARD_STARTFILE_PREFIX
241#define STANDARD_STARTFILE_PREFIX "/usr/lib"
242
243#if 0 /* This is very wrong!!! */
244#define DEFAULT_TARGET_MACHINE "i386-unknown-freebsd_1.0"
245#define GPLUSPLUS_INCLUDE_DIR "/usr/local/lib/gcc-lib/i386-unknown-freebsd_1.0/2.5.8/include"
246#define TOOL_INCLUDE_DIR "/usr/local/i386-unknown-freebsd_1.0/include"
247#define GCC_INCLUDE_DIR "/usr/local/lib/gcc-lib/i386-unknown-freebsd_1.0/2.5.8/include"
248#endif
249
250#endif /* FREEBSD_NATIVE */
251