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1 /* Definitions for Intel 386 running FreeBSD with ELF format
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2 Copyright (C) 1996, 2000, 2002, 2004, 2007 Free Software Foundation, Inc.
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3 Contributed by Eric Youngdale.
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4 Modified for stabs-in-ELF by H.J. Lu.
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5 Adapted from GNU/Linux version by John Polstra.
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6 Continued development by David O'Brien <obrien@freebsd.org>
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7
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8 This file is part of GCC.
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9
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10 GCC is free software; you can redistribute it and/or modify
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11 it under the terms of the GNU General Public License as published by
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12 the Free Software Foundation; either version 3, or (at your option)
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13 any later version.
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14
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15 GCC is distributed in the hope that it will be useful,
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16 but WITHOUT ANY WARRANTY; without even the implied warranty of
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17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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18 GNU General Public License for more details.
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19
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20 You should have received a copy of the GNU General Public License
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21 along with GCC; see the file COPYING3. If not see
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22 <http://www.gnu.org/licenses/>. */
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23
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24
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25 #define TARGET_VERSION fprintf (stderr, " (i386 FreeBSD/ELF)");
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26
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27 /* Override the default comment-starter of "/". */
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28 #undef ASM_COMMENT_START
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29 #define ASM_COMMENT_START "#"
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30
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31 #undef ASM_APP_ON
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32 #define ASM_APP_ON "#APP\n"
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33
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34 #undef ASM_APP_OFF
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35 #define ASM_APP_OFF "#NO_APP\n"
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36
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37 #undef DBX_REGISTER_NUMBER
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38 #define DBX_REGISTER_NUMBER(n) \
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39 (TARGET_64BIT ? dbx64_register_map[n] : svr4_dbx_register_map[n])
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40
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41 #undef NO_PROFILE_COUNTERS
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42 #define NO_PROFILE_COUNTERS 1
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43
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44 /* Tell final.c that we don't need a label passed to mcount. */
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45
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46 #undef MCOUNT_NAME
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47 #define MCOUNT_NAME ".mcount"
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48
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49 /* Make gcc agree with <machine/ansi.h>. */
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50
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51 #undef SIZE_TYPE
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52 #define SIZE_TYPE (TARGET_64BIT ? "long unsigned int" : "unsigned int")
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53
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54 #undef PTRDIFF_TYPE
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55 #define PTRDIFF_TYPE (TARGET_64BIT ? "long int" : "int")
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56
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57 #undef WCHAR_TYPE_SIZE
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58 #define WCHAR_TYPE_SIZE (TARGET_64BIT ? 32 : BITS_PER_WORD)
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59
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60 #undef SUBTARGET_EXTRA_SPECS /* i386.h bogusly defines it. */
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61 #define SUBTARGET_EXTRA_SPECS \
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62 { "fbsd_dynamic_linker", FBSD_DYNAMIC_LINKER }
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63
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64 /* Provide a STARTFILE_SPEC appropriate for FreeBSD. Here we add
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65 the magical crtbegin.o file (see crtstuff.c) which provides part
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66 of the support for getting C++ file-scope static object constructed
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67 before entering `main'. */
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68
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69 #undef STARTFILE_SPEC
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70 #define STARTFILE_SPEC \
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71 "%{!shared: \
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72 %{pg:gcrt1.o%s} %{!pg:%{p:gcrt1.o%s} \
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73 %{!p:%{profile:gcrt1.o%s} \
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74 %{!profile:crt1.o%s}}}} \
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75 crti.o%s %{!shared:crtbegin.o%s} %{shared:crtbeginS.o%s}"
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76
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77 /* Provide a ENDFILE_SPEC appropriate for FreeBSD. Here we tack on
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78 the magical crtend.o file (see crtstuff.c) which provides part of
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79 the support for getting C++ file-scope static object constructed
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80 before entering `main', followed by a normal "finalizer" file,
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81 `crtn.o'. */
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82
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83 #undef ENDFILE_SPEC
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84 #define ENDFILE_SPEC \
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85 "%{!shared:crtend.o%s} %{shared:crtendS.o%s} crtn.o%s"
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86
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87 /* Provide a LINK_SPEC appropriate for FreeBSD. Here we provide support
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88 for the special GCC options -static and -shared, which allow us to
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89 link things in one of these three modes by applying the appropriate
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90 combinations of options at link-time. We like to support here for
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91 as many of the other GNU linker options as possible. But I don't
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92 have the time to search for those flags. I am sure how to add
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93 support for -soname shared_object_name. H.J.
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94
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95 I took out %{v:%{!V:-V}}. It is too much :-(. They can use
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96 -Wl,-V.
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97
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98 When the -shared link option is used a final link is not being
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99 done. */
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100
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101 #undef LINK_SPEC
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102 #define LINK_SPEC "\
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103 %{p:%nconsider using `-pg' instead of `-p' with gprof(1)} \
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104 %{v:-V} \
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105 %{assert*} %{R*} %{rpath*} %{defsym*} \
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106 %{shared:-Bshareable %{h*} %{soname*}} \
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107 %{!shared: \
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108 %{!static: \
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109 %{rdynamic:-export-dynamic} \
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110 %{!dynamic-linker:-dynamic-linker %(fbsd_dynamic_linker) }} \
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111 %{static:-Bstatic}} \
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112 %{symbolic:-Bsymbolic}"
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113
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114 /* A C statement to output to the stdio stream FILE an assembler
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115 command to advance the location counter to a multiple of 1<<LOG
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116 bytes if it is within MAX_SKIP bytes.
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117
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118 This is used to align code labels according to Intel recommendations. */
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119
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120 #ifdef HAVE_GAS_MAX_SKIP_P2ALIGN
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121 #undef ASM_OUTPUT_MAX_SKIP_ALIGN
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122 #define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE, LOG, MAX_SKIP) \
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123 if ((LOG) != 0) { \
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124 if ((MAX_SKIP) == 0) fprintf ((FILE), "\t.p2align %d\n", (LOG)); \
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125 else fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP)); \
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126 }
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127 #endif
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128
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129 /* Don't default to pcc-struct-return, we want to retain compatibility with
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130 older gcc versions AND pcc-struct-return is nonreentrant.
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131 (even though the SVR4 ABI for the i386 says that records and unions are
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132 returned in memory). */
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133
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134 #undef DEFAULT_PCC_STRUCT_RETURN
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135 #define DEFAULT_PCC_STRUCT_RETURN 0
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136
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137 /* FreeBSD sets the rounding precision of the FPU to 53 bits. Let the
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138 compiler get the contents of <float.h> and std::numeric_limits correct. */
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139 #undef TARGET_96_ROUND_53_LONG_DOUBLE
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140 #define TARGET_96_ROUND_53_LONG_DOUBLE (!TARGET_64BIT)
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