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comparison gcc/config/i386/freebsd.h @ 0:a06113de4d67

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author kent <kent@cr.ie.u-ryukyu.ac.jp>
date Fri, 17 Jul 2009 14:47:48 +0900
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children f6334be47118
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-1:000000000000 0:a06113de4d67
1 /* Definitions for Intel 386 running FreeBSD with ELF format
2 Copyright (C) 1996, 2000, 2002, 2004, 2007 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
8 This file is part of GCC.
9
10 GCC 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 3, or (at your option)
13 any later version.
14
15 GCC 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.
19
20 You should have received a copy of the GNU General Public License
21 along with GCC; see the file COPYING3. If not see
22 <http://www.gnu.org/licenses/>. */
23
24
25 #define TARGET_VERSION fprintf (stderr, " (i386 FreeBSD/ELF)");
26
27 /* Override the default comment-starter of "/". */
28 #undef ASM_COMMENT_START
29 #define ASM_COMMENT_START "#"
30
31 #undef ASM_APP_ON
32 #define ASM_APP_ON "#APP\n"
33
34 #undef ASM_APP_OFF
35 #define ASM_APP_OFF "#NO_APP\n"
36
37 #undef DBX_REGISTER_NUMBER
38 #define DBX_REGISTER_NUMBER(n) \
39 (TARGET_64BIT ? dbx64_register_map[n] : svr4_dbx_register_map[n])
40
41 #undef NO_PROFILE_COUNTERS
42 #define NO_PROFILE_COUNTERS 1
43
44 /* Tell final.c that we don't need a label passed to mcount. */
45
46 #undef MCOUNT_NAME
47 #define MCOUNT_NAME ".mcount"
48
49 /* Make gcc agree with <machine/ansi.h>. */
50
51 #undef SIZE_TYPE
52 #define SIZE_TYPE (TARGET_64BIT ? "long unsigned int" : "unsigned int")
53
54 #undef PTRDIFF_TYPE
55 #define PTRDIFF_TYPE (TARGET_64BIT ? "long int" : "int")
56
57 #undef WCHAR_TYPE_SIZE
58 #define WCHAR_TYPE_SIZE (TARGET_64BIT ? 32 : BITS_PER_WORD)
59
60 #undef SUBTARGET_EXTRA_SPECS /* i386.h bogusly defines it. */
61 #define SUBTARGET_EXTRA_SPECS \
62 { "fbsd_dynamic_linker", FBSD_DYNAMIC_LINKER }
63
64 /* Provide a STARTFILE_SPEC appropriate for FreeBSD. Here we add
65 the magical crtbegin.o file (see crtstuff.c) which provides part
66 of the support for getting C++ file-scope static object constructed
67 before entering `main'. */
68
69 #undef STARTFILE_SPEC
70 #define STARTFILE_SPEC \
71 "%{!shared: \
72 %{pg:gcrt1.o%s} %{!pg:%{p:gcrt1.o%s} \
73 %{!p:%{profile:gcrt1.o%s} \
74 %{!profile:crt1.o%s}}}} \
75 crti.o%s %{!shared:crtbegin.o%s} %{shared:crtbeginS.o%s}"
76
77 /* Provide a ENDFILE_SPEC appropriate for FreeBSD. Here we tack on
78 the magical crtend.o file (see crtstuff.c) which provides part of
79 the support for getting C++ file-scope static object constructed
80 before entering `main', followed by a normal "finalizer" file,
81 `crtn.o'. */
82
83 #undef ENDFILE_SPEC
84 #define ENDFILE_SPEC \
85 "%{!shared:crtend.o%s} %{shared:crtendS.o%s} crtn.o%s"
86
87 /* Provide a LINK_SPEC appropriate for FreeBSD. Here we provide support
88 for the special GCC options -static and -shared, which allow us to
89 link things in one of these three modes by applying the appropriate
90 combinations of options at link-time. We like to support here for
91 as many of the other GNU linker options as possible. But I don't
92 have the time to search for those flags. I am sure how to add
93 support for -soname shared_object_name. H.J.
94
95 I took out %{v:%{!V:-V}}. It is too much :-(. They can use
96 -Wl,-V.
97
98 When the -shared link option is used a final link is not being
99 done. */
100
101 #undef LINK_SPEC
102 #define LINK_SPEC "\
103 %{p:%nconsider using `-pg' instead of `-p' with gprof(1)} \
104 %{v:-V} \
105 %{assert*} %{R*} %{rpath*} %{defsym*} \
106 %{shared:-Bshareable %{h*} %{soname*}} \
107 %{!shared: \
108 %{!static: \
109 %{rdynamic:-export-dynamic} \
110 %{!dynamic-linker:-dynamic-linker %(fbsd_dynamic_linker) }} \
111 %{static:-Bstatic}} \
112 %{symbolic:-Bsymbolic}"
113
114 /* A C statement to output to the stdio stream FILE an assembler
115 command to advance the location counter to a multiple of 1<<LOG
116 bytes if it is within MAX_SKIP bytes.
117
118 This is used to align code labels according to Intel recommendations. */
119
120 #ifdef HAVE_GAS_MAX_SKIP_P2ALIGN
121 #undef ASM_OUTPUT_MAX_SKIP_ALIGN
122 #define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE, LOG, MAX_SKIP) \
123 if ((LOG) != 0) { \
124 if ((MAX_SKIP) == 0) fprintf ((FILE), "\t.p2align %d\n", (LOG)); \
125 else fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP)); \
126 }
127 #endif
128
129 /* Don't default to pcc-struct-return, we want to retain compatibility with
130 older gcc versions AND pcc-struct-return is nonreentrant.
131 (even though the SVR4 ABI for the i386 says that records and unions are
132 returned in memory). */
133
134 #undef DEFAULT_PCC_STRUCT_RETURN
135 #define DEFAULT_PCC_STRUCT_RETURN 0
136
137 /* FreeBSD sets the rounding precision of the FPU to 53 bits. Let the
138 compiler get the contents of <float.h> and std::numeric_limits correct. */
139 #undef TARGET_96_ROUND_53_LONG_DOUBLE
140 #define TARGET_96_ROUND_53_LONG_DOUBLE (!TARGET_64BIT)