1 /* Definitions of target machine for GNU compiler for Intel 80386
3 Copyright (C) 1988, 1992, 1994, 1996, 1997, 1999, 2000, 2002
4 Free Software Foundation, Inc.
5 Contributed by Poul-Henning Kamp <phk@login.dkuug.dk>
6 Continued development by David O'Brien <obrien@NUXI.org>
8 This file is part of GNU CC.
10 GNU CC is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 2, or (at your option)
15 GNU CC is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with GNU CC; see the file COPYING. If not, write to
22 the Free Software Foundation, 59 Temple Place - Suite 330,
23 Boston, MA 02111-1307, USA. */
25 /* Don't assume anything about the header files. */
26 #define NO_IMPLICIT_EXTERN_C
28 /* This goes away when the math-emulator is fixed */
29 #undef TARGET_SUBTARGET_DEFAULT
30 #define TARGET_SUBTARGET_DEFAULT \
31 (MASK_80387 | MASK_IEEE_FP | MASK_FLOAT_RETURNS | MASK_NO_FANCY_MATH_387)
33 /* The macro defined in i386.h doesn't work with the old gas of
34 FreeBSD 2.x. The definition in sco.h and sol2.h appears to work,
35 but it turns out that, even though the assembler doesn't complain,
36 we get incorrect results. Fortunately, the definition in
38 #undef ASM_PREFERRED_EH_DATA_FORMAT
40 #define TARGET_OS_CPP_BUILTINS() \
43 builtin_define_std ("unix"); \
44 builtin_define ("__FreeBSD__"); \
45 builtin_assert ("system=unix"); \
46 builtin_assert ("system=bsd"); \
47 builtin_assert ("system=FreeBSD"); \
51 /* Like the default, except no -lg. */
52 #define LIB_SPEC "%{!shared:%{!pg:-lc}%{pg:-lc_p}}"
55 #define SIZE_TYPE "unsigned int"
58 #define PTRDIFF_TYPE "int"
61 #define WCHAR_TYPE "int"
63 #undef WCHAR_TYPE_SIZE
64 #define WCHAR_TYPE_SIZE BITS_PER_WORD
66 /* Override the default comment-starter of "/". */
68 #undef ASM_COMMENT_START
69 #define ASM_COMMENT_START "#"
72 #define ASM_APP_ON "#APP\n"
75 #define ASM_APP_OFF "#NO_APP\n"
77 /* FreeBSD using a.out does not support DWARF2 unwinding mechanisms. */
78 #define DWARF2_UNWIND_INFO 0
80 /* Don't default to pcc-struct-return, because in FreeBSD we prefer the
81 superior nature of the older gcc way. */
82 #define DEFAULT_PCC_STRUCT_RETURN 0
84 /* Ensure we the configuration knows our system correctly so we can link with
85 libraries compiled with the native cc. */
86 #undef NO_DOLLAR_IN_LABEL
88 /* i386 freebsd still uses old binutils that don't insert nops by default
89 when the .align directive demands to insert extra space in the text
91 #undef ASM_OUTPUT_ALIGN
92 #define ASM_OUTPUT_ALIGN(FILE,LOG) \
93 if ((LOG)!=0) fprintf ((FILE), "\t.align %d,0x90\n", (LOG))
95 /* Profiling routines, partially copied from i386/osfrose.h. */
97 /* Redefine this to use %eax instead of %edx. */
98 #undef FUNCTION_PROFILER
99 #define FUNCTION_PROFILER(FILE, LABELNO) \
103 fprintf (FILE, "\tleal %sP%d@GOTOFF(%%ebx),%%eax\n", \
104 LPREFIX, (LABELNO)); \
105 fprintf (FILE, "\tcall *mcount@GOT(%%ebx)\n"); \
109 fprintf (FILE, "\tmovl $%sP%d,%%eax\n", LPREFIX, (LABELNO)); \
110 fprintf (FILE, "\tcall mcount\n"); \
115 * Some imports from svr4.h in support of shared libraries.
116 * Currently, we need the DECLARE_OBJECT_SIZE stuff.
119 /* Define the strings used for the special svr4 .type and .size directives.
120 These strings generally do not vary from one system running svr4 to
121 another, but if a given system (e.g. m88k running svr) needs to use
122 different pseudo-op names for these, they may be overridden in the
123 file which includes this one. */
125 #define TYPE_ASM_OP "\t.type\t"
126 #define SIZE_ASM_OP "\t.size\t"
128 /* The following macro defines the format used to output the second
129 operand of the .type assembler directive. Different svr4 assemblers
130 expect various different forms for this operand. The one given here
131 is just a default. You may need to override it in your machine-
132 specific tm.h file (depending upon the particulars of your assembler). */
134 #define TYPE_OPERAND_FMT "@%s"
136 /* Write the extra assembler code needed to declare a function's result.
137 Most svr4 assemblers don't require any special declaration of the
138 result value, but there are exceptions. */
140 #ifndef ASM_DECLARE_RESULT
141 #define ASM_DECLARE_RESULT(FILE, RESULT)
144 /* These macros generate the special .type and .size directives which
145 are used to set the corresponding fields of the linker symbol table
146 entries in an ELF object file under SVR4. These macros also output
147 the starting labels for the relevant functions/objects. */
149 /* Write the extra assembler code needed to declare a function properly.
150 Some svr4 assemblers need to also have something extra said about the
151 function's return value. We allow for that here. */
153 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
156 ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "function"); \
157 ASM_DECLARE_RESULT (FILE, DECL_RESULT (DECL)); \
158 ASM_OUTPUT_LABEL (FILE, NAME); \
162 /* Write the extra assembler code needed to declare an object properly. */
164 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL) \
167 HOST_WIDE_INT size; \
169 ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "object"); \
171 size_directive_output = 0; \
172 if (!flag_inhibit_size_directive \
173 && (DECL) && DECL_SIZE (DECL)) \
175 size_directive_output = 1; \
176 size = int_size_in_bytes (TREE_TYPE (DECL)); \
177 ASM_OUTPUT_SIZE_DIRECTIVE (FILE, NAME, size); \
180 ASM_OUTPUT_LABEL (FILE, NAME); \
184 /* Output the size directive for a decl in rest_of_decl_compilation
185 in the case where we did not do so before the initializer.
186 Once we find the error_mark_node, we know that the value of
187 size_directive_output was set
188 by ASM_DECLARE_OBJECT_NAME when it was run for the same decl. */
190 #define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP_LEVEL, AT_END) \
192 const char *name = XSTR (XEXP (DECL_RTL (DECL), 0), 0); \
193 HOST_WIDE_INT size; \
194 if (!flag_inhibit_size_directive && DECL_SIZE (DECL) \
195 && ! AT_END && TOP_LEVEL \
196 && DECL_INITIAL (DECL) == error_mark_node \
197 && !size_directive_output) \
199 size_directive_output = 1; \
200 size = int_size_in_bytes (TREE_TYPE (DECL)); \
201 ASM_OUTPUT_SIZE_DIRECTIVE (FILE, name, size); \
205 /* This is how to declare the size of a function. */
207 #define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL) \
209 if (!flag_inhibit_size_directive) \
210 ASM_OUTPUT_MEASURED_SIZE (FILE, FNAME); \
213 #define ASM_SPEC " %| %{fpic:-k} %{fPIC:-k}"
215 "%{p:%e`-p' not supported; use `-pg' and gprof(1)} \
216 %{shared:-Bshareable} \
217 %{!shared:%{!nostdlib:%{!r:%{!e*:-e start}}} -dc -dp %{static:-Bstatic} \
218 %{pg:-Bstatic} %{Z}} \
221 #define STARTFILE_SPEC \
222 "%{shared:c++rt0.o%s} \
223 %{!shared:%{pg:gcrt0.o%s}%{!pg:%{static:scrt0.o%s}%{!static:crt0.o%s}}}"
225 /* Define this so we can compile MS code for use with WINE. */
226 #define HANDLE_PRAGMA_PACK_PUSH_POP
228 /* FreeBSD 2.2.7's assembler does not support .quad properly. Do not