1/* Definitions for Intel 386 running FreeBSD with ELF format
2   Copyright (C) 1996, 2000, 2002, 2004 Free Software Foundation, Inc.
3   Contributed by Eric Youngdale.
4   Modified for stabs-in-ELF by H.J. Lu.
5   Adapted from GNU/Linux version by John Polstra.
6   Continued development by David O'Brien <obrien@freebsd.org>
7
8This file is part of GCC.
9
10GCC is free software; you can redistribute it and/or modify
11it under the terms of the GNU General Public License as published by
12the Free Software Foundation; either version 2, or (at your option)
13any later version.
14
15GCC is distributed in the hope that it will be useful,
16but WITHOUT ANY WARRANTY; without even the implied warranty of
17MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18GNU General Public License for more details.
19
20You should have received a copy of the GNU General Public License
21along with GCC; see the file COPYING.  If not, write to
22the Free Software Foundation, 51 Franklin Street, Fifth Floor,
23Boston, MA 02110-1301, USA.  */
24
25
26#define TARGET_VERSION fprintf (stderr, " (i386 FreeBSD/ELF)");
27
28/* Override the default comment-starter of "/".  */
29#undef  ASM_COMMENT_START
30#define ASM_COMMENT_START "#"
31
32#undef  ASM_APP_ON
33#define ASM_APP_ON "#APP\n"
34
35#undef  ASM_APP_OFF
36#define ASM_APP_OFF "#NO_APP\n"
37
38#undef  DBX_REGISTER_NUMBER
39#define DBX_REGISTER_NUMBER(n) \
40  (TARGET_64BIT ? dbx64_register_map[n] : svr4_dbx_register_map[n])
41
42#undef  NO_PROFILE_COUNTERS
43#define NO_PROFILE_COUNTERS	1
44
45/* Tell final.c that we don't need a label passed to mcount.  */
46
47#undef  MCOUNT_NAME
48#define MCOUNT_NAME ".mcount"
49
50/* Make gcc agree with <machine/ansi.h>.  */
51
52#undef  SIZE_TYPE
53#define SIZE_TYPE	(TARGET_64BIT ? "long unsigned int" : "unsigned int")
54
55#undef  PTRDIFF_TYPE
56#define PTRDIFF_TYPE	(TARGET_64BIT ? "long int" : "int")
57
58#undef  WCHAR_TYPE_SIZE
59#define WCHAR_TYPE_SIZE	(TARGET_64BIT ? 32 : BITS_PER_WORD)
60
61#undef  SUBTARGET_EXTRA_SPECS	/* i386.h bogusly defines it.  */
62#define SUBTARGET_EXTRA_SPECS \
63  { "fbsd_dynamic_linker", FBSD_DYNAMIC_LINKER }
64
65/* Provide a STARTFILE_SPEC appropriate for FreeBSD.  Here we add
66   the magical crtbegin.o file (see crtstuff.c) which provides part
67	of the support for getting C++ file-scope static object constructed
68	before entering `main'.  */
69
70#undef	STARTFILE_SPEC
71#define STARTFILE_SPEC \
72  "%{!shared: \
73     %{pg:gcrt1.o%s} %{!pg:%{p:gcrt1.o%s} \
74		       %{!p:%{profile:gcrt1.o%s} \
75			 %{!profile:crt1.o%s}}}} \
76   crti.o%s %{!shared:crtbegin.o%s} %{shared:crtbeginS.o%s}"
77
78/* Provide a ENDFILE_SPEC appropriate for FreeBSD.  Here we tack on
79   the magical crtend.o file (see crtstuff.c) which provides part of
80	the support for getting C++ file-scope static object constructed
81	before entering `main', followed by a normal "finalizer" file,
82	`crtn.o'.  */
83
84#undef	ENDFILE_SPEC
85#define ENDFILE_SPEC \
86  "%{!shared:crtend.o%s} %{shared:crtendS.o%s} crtn.o%s"
87
88/* Provide a LINK_SPEC appropriate for FreeBSD.  Here we provide support
89   for the special GCC options -static and -shared, which allow us to
90   link things in one of these three modes by applying the appropriate
91   combinations of options at link-time. We like to support here for
92   as many of the other GNU linker options as possible. But I don't
93   have the time to search for those flags. I am sure how to add
94   support for -soname shared_object_name. H.J.
95
96   I took out %{v:%{!V:-V}}. It is too much :-(. They can use
97   -Wl,-V.
98
99   When the -shared link option is used a final link is not being
100   done.  */
101
102#undef	LINK_SPEC
103#define LINK_SPEC "\
104  %{p:%nconsider using `-pg' instead of `-p' with gprof(1)} \
105  %{v:-V} \
106  %{assert*} %{R*} %{rpath*} %{defsym*} \
107  %{shared:-Bshareable %{h*} %{soname*}} \
108    %{!shared: \
109      %{!static: \
110        %{rdynamic:-export-dynamic} \
111        %{!dynamic-linker:-dynamic-linker %(fbsd_dynamic_linker) }} \
112    %{static:-Bstatic}} \
113  %{symbolic:-Bsymbolic}"
114
115/* A C statement to output to the stdio stream FILE an assembler
116   command to advance the location counter to a multiple of 1<<LOG
117   bytes if it is within MAX_SKIP bytes.
118
119   This is used to align code labels according to Intel recommendations.  */
120
121#ifdef HAVE_GAS_MAX_SKIP_P2ALIGN
122#undef  ASM_OUTPUT_MAX_SKIP_ALIGN
123#define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE, LOG, MAX_SKIP)					\
124  if ((LOG) != 0) {														\
125    if ((MAX_SKIP) == 0) fprintf ((FILE), "\t.p2align %d\n", (LOG));	\
126    else fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP));	\
127  }
128#endif
129
130/* Don't default to pcc-struct-return, we want to retain compatibility with
131   older gcc versions AND pcc-struct-return is nonreentrant.
132   (even though the SVR4 ABI for the i386 says that records and unions are
133   returned in memory).  */
134
135#undef  DEFAULT_PCC_STRUCT_RETURN
136#define DEFAULT_PCC_STRUCT_RETURN 0
137
138/* FreeBSD sets the rounding precision of the FPU to 53 bits.  Let the
139   compiler get the contents of <float.h> and std::numeric_limits correct.  */
140#undef TARGET_96_ROUND_53_LONG_DOUBLE
141#define TARGET_96_ROUND_53_LONG_DOUBLE (!TARGET_64BIT)
142