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1 /* Operating system specific defines to be used when targeting GCC for
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2 generic System V Release 3 system.
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3 Copyright (C) 1991, 1996, 2000, 2002, 2004, 2007 Free Software Foundation, Inc.
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4 Contributed by Ron Guilmette (rfg@monkeys.com).
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5
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6 This file is part of GCC.
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7
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8 GCC is free software; you can redistribute it and/or modify
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9 it under the terms of the GNU General Public License as published by
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10 the Free Software Foundation; either version 3, or (at your option)
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11 any later version.
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12
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13 GCC is distributed in the hope that it will be useful,
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14 but WITHOUT ANY WARRANTY; without even the implied warranty of
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15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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16 GNU General Public License for more details.
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17
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18 You should have received a copy of the GNU General Public License
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19 along with GCC; see the file COPYING3. If not see
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20 <http://www.gnu.org/licenses/>. */
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21
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22 /* Define a symbol indicating that we are using svr3.h. */
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23 #define USING_SVR3_H
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24
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25 /* Define a symbol so that libgcc* can know what sort of operating
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26 environment and assembler syntax we are targeting for. */
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27 #define SVR3_target
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28
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29 /* Assembler, linker, library, and startfile spec's. */
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30
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31 /* The .file command should always begin the output. */
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32 #define TARGET_ASM_FILE_START_FILE_DIRECTIVE true
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33
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34 /* This says how to output an assembler line
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35 to define a global common symbol. */
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36 /* We don't use ROUNDED because the standard compiler doesn't,
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37 and the linker gives error messages if a common symbol
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38 has more than one length value. */
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39
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40 #undef ASM_OUTPUT_COMMON
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41 #define ASM_OUTPUT_COMMON(FILE, NAME, SIZE, ROUNDED) \
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42 ( fputs (".comm ", (FILE)), \
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43 assemble_name ((FILE), (NAME)), \
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44 fprintf ((FILE), ",%lu\n", (unsigned long)(SIZE)))
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45
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46 /* This says how to output an assembler line
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47 to define a local common symbol. */
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48
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49 /* Note that using bss_section here caused errors
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50 in building shared libraries on system V.3. */
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51 #undef ASM_OUTPUT_LOCAL
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52 #define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE, ROUNDED) \
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53 do { \
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54 int align = exact_log2 (ROUNDED); \
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55 if (align > 2) align = 2; \
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56 switch_to_section (data_section); \
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57 ASM_OUTPUT_ALIGN ((FILE), align == -1 ? 2 : align); \
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58 ASM_OUTPUT_LABEL ((FILE), (NAME)); \
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59 fprintf ((FILE), "\t.set .,.+%u\n", (int)(ROUNDED)); \
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60 } while (0)
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61
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62 /* Output #ident as a .ident. */
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63
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64 #undef ASM_OUTPUT_IDENT
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65 #define ASM_OUTPUT_IDENT(FILE, NAME) \
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66 fprintf (FILE, "\t.ident \"%s\"\n", NAME);
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67
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68 /* Use periods rather than dollar signs in special g++ assembler names. */
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69
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70 #define NO_DOLLAR_IN_LABEL
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71
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72 /* System V Release 3 uses COFF debugging info. */
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73
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74 #define SDB_DEBUGGING_INFO 1
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75
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76 /* We don't want to output DBX debugging information. */
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77
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78 #undef DBX_DEBUGGING_INFO
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79
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80 /* Define the actual types of some ANSI-mandated types. These
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81 definitions should work for most SVR3 systems. */
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82
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83 #undef SIZE_TYPE
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84 #define SIZE_TYPE "unsigned int"
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85
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86 #undef PTRDIFF_TYPE
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87 #define PTRDIFF_TYPE "int"
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88
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89 #undef WCHAR_TYPE
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90 #define WCHAR_TYPE "long int"
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91
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92 #undef WCHAR_TYPE_SIZE
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93 #define WCHAR_TYPE_SIZE BITS_PER_WORD
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94
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95 /* The prefix to add to user-visible assembler symbols.
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96
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97 For System V Release 3 the convention is to prepend a leading
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98 underscore onto user-level symbol names. */
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99
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100 #undef USER_LABEL_PREFIX
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101 #define USER_LABEL_PREFIX "_"
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102
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103 /* This is how to store into the string LABEL
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104 the symbol_ref name of an internal numbered label where
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105 PREFIX is the class of label and NUM is the number within the class.
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106 This is suitable for output with `assemble_name'.
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107
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108 For most svr3 systems, the convention is that any symbol which begins
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109 with a period is not put into the linker symbol table by the assembler. */
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110
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111 #undef ASM_GENERATE_INTERNAL_LABEL
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112 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM) \
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113 sprintf (LABEL, "*%s%s%ld", LOCAL_LABEL_PREFIX, PREFIX, (long)(NUM))
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114
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115 /* We want local labels to start with period if made with asm_fprintf. */
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116 #undef LOCAL_LABEL_PREFIX
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117 #define LOCAL_LABEL_PREFIX "."
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118
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119 /* Support const sections and the ctors and dtors sections for g++. */
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120
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121 /* Define a few machine-specific details of the implementation of
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122 constructors.
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123
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124 The __CTORS_LIST__ goes in the .init section. Define CTOR_LIST_BEGIN
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125 and CTOR_LIST_END to contribute to the .init section an instruction to
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126 push a word containing 0 (or some equivalent of that).
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127
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128 Define TARGET_ASM_CONSTRUCTOR to push the address of the constructor. */
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129
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130 #define INIT_SECTION_ASM_OP "\t.section\t.init"
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131 #define FINI_SECTION_ASM_OP "\t.section .fini,\"x\""
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132 #define DTORS_SECTION_ASM_OP FINI_SECTION_ASM_OP
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133
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134 /* CTOR_LIST_BEGIN and CTOR_LIST_END are machine-dependent
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135 because they push on the stack. */
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136
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137 #ifndef STACK_GROWS_DOWNWARD
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138
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139 /* Constructor list on stack is in reverse order. Go to the end of the
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140 list and go backwards to call constructors in the right order. */
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141 #define DO_GLOBAL_CTORS_BODY \
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142 do { \
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143 func_ptr *p, *beg = alloca (0); \
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144 for (p = beg; *p; p++) \
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145 ; \
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146 while (p != beg) \
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147 (*--p) (); \
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148 } while (0)
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149
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150 #else
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151
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152 /* Constructor list on stack is in correct order. Just call them. */
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153 #define DO_GLOBAL_CTORS_BODY \
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154 do { \
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155 func_ptr *p, *beg = alloca (0); \
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156 for (p = beg; *p; ) \
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157 (*p++) (); \
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158 } while (0)
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159
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160 #endif /* STACK_GROWS_DOWNWARD */
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