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1 /* Configuration for an OpenBSD i386 target.
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2
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3 Copyright (C) 2005, 2007 Free Software Foundation, Inc.
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4
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5 This file is part of GCC.
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6
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7 GCC is free software; you can redistribute it and/or modify
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8 it under the terms of the GNU General Public License as published by
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9 the Free Software Foundation; either version 3, or (at your option)
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10 any later version.
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11
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12 GCC is distributed in the hope that it will be useful,
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13 but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 GNU General Public License for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with GCC; see the file COPYING3. If not see
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19 <http://www.gnu.org/licenses/>. */
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20
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21 /* This gets defined in tm.h->linux.h->svr4.h, and keeps us from using
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22 libraries compiled with the native cc, so undef it. */
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23 #undef NO_DOLLAR_IN_LABEL
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24
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25 /* Override the default comment-starter of "/". */
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26 #undef ASM_COMMENT_START
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27 #define ASM_COMMENT_START "#"
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28
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29 #undef DBX_REGISTER_NUMBER
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30 #define DBX_REGISTER_NUMBER(n) svr4_dbx_register_map[n]
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31
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32 /* This goes away when the math-emulator is fixed */
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33 #undef TARGET_DEFAULT
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34 #define TARGET_DEFAULT \
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35 (MASK_80387 | MASK_IEEE_FP | MASK_FLOAT_RETURNS | MASK_NO_FANCY_MATH_387)
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36
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37 /* Run-time target specifications */
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38
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39 #define TARGET_OS_CPP_BUILTINS() \
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40 do \
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41 { \
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42 OPENBSD_OS_CPP_BUILTINS(); \
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43 } \
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44 while (0)
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45
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46 /* As an elf system, we need crtbegin/crtend stuff. */
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47 #undef STARTFILE_SPEC
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48 #define STARTFILE_SPEC "\
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49 %{!shared: %{pg:gcrt0%O%s} %{!pg:%{p:gcrt0%O%s} %{!p:crt0%O%s}} \
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50 crtbegin%O%s} %{shared:crtbeginS%O%s}"
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51 #undef ENDFILE_SPEC
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52 #define ENDFILE_SPEC "%{!shared:crtend%O%s} %{shared:crtendS%O%s}"
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53
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54 /* Layout of source language data types. */
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55
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56 /* This must agree with <machine/ansi.h> */
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57 #undef SIZE_TYPE
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58 #define SIZE_TYPE "unsigned int"
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59
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60 #undef PTRDIFF_TYPE
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61 #define PTRDIFF_TYPE "int"
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62
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63 #undef WCHAR_TYPE
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64 #define WCHAR_TYPE "int"
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65
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66 #undef WCHAR_TYPE_SIZE
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67 #define WCHAR_TYPE_SIZE BITS_PER_WORD
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68
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69 /* Assembler format: overall framework. */
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70
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71 #undef ASM_APP_ON
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72 #define ASM_APP_ON "#APP\n"
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73
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74 #undef ASM_APP_OFF
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75 #define ASM_APP_OFF "#NO_APP\n"
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76
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77 #undef SET_ASM_OP
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78 #define SET_ASM_OP "\t.set\t"
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79
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80 /* The following macros were originally stolen from i386v4.h.
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81 These have to be defined to get PIC code correct. */
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82
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83 /* Assembler format: dispatch tables. */
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84
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85 /* Assembler format: sections. */
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86
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87 /* Stack & calling: aggregate returns. */
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88
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89 /* Don't default to pcc-struct-return, because gcc is the only compiler, and
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90 we want to retain compatibility with older gcc versions. */
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91 #define DEFAULT_PCC_STRUCT_RETURN 0
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92
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93 /* Assembler format: alignment output. */
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94
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95 #ifdef HAVE_GAS_MAX_SKIP_P2ALIGN
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96 #define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE,LOG,MAX_SKIP) \
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97 if ((LOG) != 0) {\
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98 if ((MAX_SKIP) == 0) fprintf ((FILE), "\t.p2align %d\n", (LOG)); \
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99 else fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP)); \
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100 }
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101 #endif
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102
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103 /* Stack & calling: profiling. */
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104
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105 /* OpenBSD's profiler recovers all information from the stack pointer.
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106 The icky part is not here, but in machine/profile.h. */
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107 #undef FUNCTION_PROFILER
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108 #define FUNCTION_PROFILER(FILE, LABELNO) \
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109 fputs (flag_pic ? "\tcall __mcount@PLT\n": "\tcall __mcount\n", FILE);
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110
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111 /* Assembler format: exception region output. */
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112
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113 /* our configuration still doesn't handle dwarf2 correctly */
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114 #define DWARF2_UNWIND_INFO 0
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115
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116 /* Assembler format: alignment output. */
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117
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118 /* Note that we pick up ASM_OUTPUT_MAX_SKIP_ALIGN from i386/gas.h */
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119
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120 /* Note that we pick up ASM_OUTPUT_MI_THUNK from unix.h. */
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121
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122 #undef LINK_SPEC
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123 #define LINK_SPEC \
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124 "%{!shared:%{!nostdlib:%{!r*:%{!e*:-e __start}}}} \
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125 %{shared:-shared} %{R*} \
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126 %{static:-Bstatic} \
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127 %{!static:-Bdynamic} \
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128 %{assert*} \
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129 %{!dynamic-linker:-dynamic-linker /usr/libexec/ld.so}"
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130
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131 #define OBSD_HAS_CORRECT_SPECS
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