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1 /* Definitions of target machine for GNU compiler, for HPs running
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2 HPUX using the 64bit runtime model.
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3 Copyright (C) 1999, 2000, 2001, 2002, 2004, 2005, 2007, 2008
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4 Free Software Foundation, Inc.
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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 /* We can debug dynamically linked executables on hpux11; we also
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23 want dereferencing of a NULL pointer to cause a SEGV. Do not move
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24 the "+Accept TypeMismatch" switch. We check for it in collect2
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25 to determine which init/fini is needed. */
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26 #undef LINK_SPEC
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27 #if ((TARGET_DEFAULT | TARGET_CPU_DEFAULT) & MASK_GNU_LD)
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28 #define LINK_SPEC \
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29 "%{!shared:%{p:-L/lib/pa20_64/libp -L/usr/lib/pa20_64/libp %{!static:\
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30 %nWarning: consider linking with `-static' as system libraries with\n\
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31 %n profiling support are only provided in archive format}}}\
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32 %{!shared:%{pg:-L/lib/pa20_64/libp -L/usr/lib/pa20_64/libp %{!static:\
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33 %nWarning: consider linking with `-static' as system libraries with\n\
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34 %n profiling support are only provided in archive format}}}\
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35 %{mhp-ld:+Accept TypeMismatch -z} -E %{mlinker-opt:-O}\
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36 %{!shared:-u main %{!nostdlib:%{!nodefaultlibs:-u __cxa_finalize}}}\
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37 %{static:-a archive} %{shared:%{mhp-ld:-b}%{!mhp-ld:-shared}}"
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38 #else
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39 #define LINK_SPEC \
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40 "%{!shared:%{p:-L/lib/pa20_64/libp -L/usr/lib/pa20_64/libp %{!static:\
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41 %nWarning: consider linking with `-static' as system libraries with\n\
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42 %n profiling support are only provided in archive format}}}\
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43 %{!shared:%{pg:-L/lib/pa20_64/libp -L/usr/lib/pa20_64/libp %{!static:\
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44 %nWarning: consider linking with `-static' as system libraries with\n\
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45 %n profiling support are only provided in archive format}}}\
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46 %{!mgnu-ld:+Accept TypeMismatch -z} -E %{mlinker-opt:-O}\
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47 %{!shared:-u main %{!nostdlib:%{!nodefaultlibs:-u __cxa_finalize}}}\
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48 %{static:-a archive} %{shared:%{mgnu-ld:-shared}%{!mgnu-ld:-b}}"
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49 #endif
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50
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51 /* Profiling support is only provided in libc.a. However, libprof and
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52 libgprof are only available in shared form on HP-UX 11.00. We use
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53 the shared form if we are using the GNU linker or an archive form
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54 isn't available. We also usually need to link with libdld and it's
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55 only available in shared form. */
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56 #undef LIB_SPEC
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57 #if ((TARGET_DEFAULT | TARGET_CPU_DEFAULT) & MASK_GNU_LD)
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58 #define LIB_SPEC \
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59 "%{!shared:\
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60 %{!p:%{!pg:%{static|mt|pthread:%{fopenmp:%{static:-a shared} -lrt\
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61 %{static:-a archive}} -lpthread} -lc\
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62 %{static:%{!nolibdld:-a shared -ldld -a archive -lc}}}}\
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63 %{p:%{!pg:%{static:%{!mhp-ld:-a shared}%{mhp-ld:-a archive_shared}}\
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64 -lprof %{static:-a archive}\
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65 %{static|mt|pthread:%{fopenmp:%{static:-a shared} -lrt\
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66 %{static:-a archive}} -lpthread} -lc\
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67 %{static:%{!nolibdld:-a shared -ldld -a archive -lc}}}}\
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68 %{pg:%{static:%{!mhp-ld:-a shared}%{mhp-ld:-a archive_shared}}\
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69 -lgprof %{static:-a archive}\
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70 %{static|mt|pthread:%{fopenmp:%{static:-a shared} -lrt\
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71 %{static:-a archive}} -lpthread} -lc\
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72 %{static:%{!nolibdld:-a shared -ldld -a archive -lc}}}}\
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73 %{shared:%{mt|pthread:-lpthread}}"
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74 #else
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75 #define LIB_SPEC \
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76 "%{!shared:\
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77 %{!p:%{!pg:%{static|mt|pthread:%{fopenmp:%{static:-a shared} -lrt\
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78 %{static:-a archive}} -lpthread} -lc\
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79 %{static:%{!nolibdld:-a shared -ldld -a archive -lc}}}}\
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80 %{p:%{!pg:%{static:%{mgnu-ld:-a shared}%{!mgnu-ld:-a archive_shared}}\
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81 -lprof %{static:-a archive}\
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82 %{static|mt|pthread:%{fopenmp:%{static:-a shared} -lrt\
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83 %{static:-a archive}} -lpthread} -lc\
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84 %{static:%{!nolibdld:-a shared -ldld -a archive -lc}}}}\
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85 %{pg:%{static:%{mgnu-ld:-a shared}%{!mgnu-ld:-a archive_shared}}\
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86 -lgprof %{static:-a archive}\
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87 %{static|mt|pthread:%{fopenmp:%{static:-a shared} -lrt\
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88 %{static:-a archive}} -lpthread} -lc\
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89 %{static:%{!nolibdld:-a shared -ldld -a archive -lc}}}}\
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90 %{shared:%{mt|pthread:-lpthread}}"
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91 #endif
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92
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93 /* The libgcc_stub.a and milli.a libraries need to come last. */
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94 #undef LINK_GCC_C_SEQUENCE_SPEC
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95 #define LINK_GCC_C_SEQUENCE_SPEC "\
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96 %G %L %G %{!nostdlib:%{!nodefaultlibs:%{!shared:-lgcc_stub}\
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97 milli.a%s}}"
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98
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99 /* Under hpux11, the normal location of the `ld' and `as' programs is the
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100 /usr/ccs/bin directory. */
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101
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102 #ifndef CROSS_DIRECTORY_STRUCTURE
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103 #undef MD_EXEC_PREFIX
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104 #define MD_EXEC_PREFIX "/usr/ccs/bin"
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105 #endif
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106
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107 /* Default prefixes. */
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108
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109 #undef STANDARD_STARTFILE_PREFIX_1
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110 #define STANDARD_STARTFILE_PREFIX_1 "/lib/pa20_64/"
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111
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112 #undef STANDARD_STARTFILE_PREFIX_2
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113 #define STANDARD_STARTFILE_PREFIX_2 "/usr/lib/pa20_64/"
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114
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115 /* Under hpux11 the normal location of the various pa20_64 *crt*.o files
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116 is the /usr/ccs/lib/pa20_64 directory. Some files may also be in the
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117 /opt/langtools/lib/pa20_64 directory. */
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118
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119 #ifndef CROSS_DIRECTORY_STRUCTURE
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120 #undef MD_STARTFILE_PREFIX
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121 #define MD_STARTFILE_PREFIX "/usr/ccs/lib/pa20_64/"
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122 #endif
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123
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124 #ifndef CROSS_DIRECTORY_STRUCTURE
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125 #undef MD_STARTFILE_PREFIX_1
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126 #define MD_STARTFILE_PREFIX_1 "/opt/langtools/lib/pa20_64/"
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127 #endif
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128
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129 /* This macro specifies the biggest alignment supported by the object
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130 file format of this machine.
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131
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132 The .align directive in the HP assembler allows alignments up to
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133 4096 bytes. However, the maximum alignment of a global common symbol
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134 is 16 bytes using HP ld. Unfortunately, this macro doesn't provide
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135 a method to check for common symbols. */
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136 #undef MAX_OFILE_ALIGNMENT
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137 #define MAX_OFILE_ALIGNMENT 32768
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138
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139 /* Due to limitations in the target structure, it isn't currently possible
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140 to dynamically switch between the GNU and HP assemblers. */
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141 #undef TARGET_GAS
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142
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143 /* Configure selects the standard ELFOS defines for use with GAS. */
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144 #ifdef USING_ELFOS_H
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145
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146 /* We are using GAS. */
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147 #define TARGET_GAS 1
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148
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149 #undef TARGET_ASM_FILE_START
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150 #define TARGET_ASM_FILE_START pa_hpux64_gas_file_start
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151
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152 /* This is how we output a null terminated string. */
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153 #undef STRING_ASM_OP
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154 #define STRING_ASM_OP "\t.stringz\t"
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155
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156 #define TEXT_SECTION_ASM_OP "\t.text"
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157 #define DATA_SECTION_ASM_OP "\t.data"
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158 #define BSS_SECTION_ASM_OP "\t.section\t.bss"
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159
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160 #define JCR_SECTION_NAME ".jcr"
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161
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162 #define HP_INIT_ARRAY_SECTION_ASM_OP "\t.section\t.init"
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163 #define GNU_INIT_ARRAY_SECTION_ASM_OP "\t.section\t.init_array"
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164 #define HP_FINI_ARRAY_SECTION_ASM_OP "\t.section\t.fini"
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165 #define GNU_FINI_ARRAY_SECTION_ASM_OP "\t.section\t.fini_array"
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166
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167 /* We need to override the following two macros defined in elfos.h since
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168 the .comm directive has a different syntax and it can't be used for
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169 local common symbols. */
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170 #undef ASM_OUTPUT_ALIGNED_COMMON
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171 #define ASM_OUTPUT_ALIGNED_COMMON(FILE, NAME, SIZE, ALIGN) \
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172 pa_asm_output_aligned_common (FILE, NAME, SIZE, ALIGN)
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173
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174 #undef ASM_OUTPUT_ALIGNED_LOCAL
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175 #define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN) \
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176 pa_asm_output_aligned_local (FILE, NAME, SIZE, ALIGN)
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177
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178 /* The define in pa.h doesn't work with the alias attribute. The
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179 default is ok with the following define for GLOBAL_ASM_OP. */
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180 #undef TARGET_ASM_GLOBALIZE_LABEL
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181
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182 /* This is how we globalize a label. */
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183 #define GLOBAL_ASM_OP "\t.globl\t"
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184
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185 /* Hacked version from defaults.h that uses assemble_name_raw
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186 instead of assemble_name. A symbol in a type directive that
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187 isn't otherwise referenced doesn't cause the symbol to be
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188 placed in the symbol table of the assembled object. */
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189 #undef ASM_OUTPUT_TYPE_DIRECTIVE
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190 #define ASM_OUTPUT_TYPE_DIRECTIVE(STREAM, NAME, TYPE) \
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191 do { \
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192 fputs (TYPE_ASM_OP, STREAM); \
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193 assemble_name_raw (STREAM, NAME); \
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194 fputs (", ", STREAM); \
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195 fprintf (STREAM, TYPE_OPERAND_FMT, TYPE); \
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196 putc ('\n', STREAM); \
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197 } while (0)
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198
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199 /* Hacked version from elfos.h that doesn't output a label. */
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200 #undef ASM_DECLARE_FUNCTION_NAME
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201 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
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202 do { \
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203 ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "function"); \
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204 ASM_DECLARE_RESULT (FILE, DECL_RESULT (DECL)); \
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205 } while (0)
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206
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207 /* The type of external references must be set correctly for the
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208 dynamic loader to work correctly. This is equivalent to the
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209 HP assembler's .IMPORT directive but relates more directly to
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210 ELF object file types. */
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211 #undef ASM_OUTPUT_EXTERNAL
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212 #define ASM_OUTPUT_EXTERNAL(FILE, DECL, NAME) \
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213 pa_hpux_asm_output_external ((FILE), (DECL), (NAME))
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214 #define ASM_OUTPUT_EXTERNAL_REAL(FILE, DECL, NAME) \
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215 do { \
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216 if (FUNCTION_NAME_P (NAME)) \
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217 ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "function"); \
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218 else \
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219 ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "object"); \
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220 default_elf_asm_output_external (FILE, DECL, NAME); \
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221 } while (0)
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222
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223 /* We need set the type for external libcalls. Also note that not all
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224 libcall names are passed to targetm.encode_section_info (e.g., __main).
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225 Thus, we also have to do the section encoding if it hasn't been done
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226 already. */
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227 #undef ASM_OUTPUT_EXTERNAL_LIBCALL
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228 #define ASM_OUTPUT_EXTERNAL_LIBCALL(FILE, FUN) \
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229 do { \
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230 if (!FUNCTION_NAME_P (XSTR (FUN, 0))) \
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231 hppa_encode_label (FUN); \
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232 ASM_OUTPUT_TYPE_DIRECTIVE (FILE, XSTR (FUN, 0), "function"); \
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233 } while (0)
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234
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235 /* We need to use the HP style for internal labels. */
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236 #undef ASM_GENERATE_INTERNAL_LABEL
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237 #define ASM_GENERATE_INTERNAL_LABEL(LABEL, PREFIX, NUM) \
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238 sprintf (LABEL, "*%c$%s%04ld", (PREFIX)[0], (PREFIX) + 1, (long)(NUM))
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239
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240 #else /* USING_ELFOS_H */
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241
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242 /* We are not using GAS. */
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243 #define TARGET_GAS 0
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244
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245 /* HPUX 11 has the "new" HP assembler. It's still lousy, but it's a whole
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246 lot better than the assembler shipped with older versions of hpux.
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247 However, it doesn't support weak symbols and is a bad fit with ELF. */
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248 #undef NEW_HP_ASSEMBLER
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249 #define NEW_HP_ASSEMBLER 1
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250
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251 /* It looks like DWARF2 will be the easiest debug format to handle on this
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252 platform. */
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253 #define DWARF2_DEBUGGING_INFO 1
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254 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
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255
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256 /* This target uses the ELF object file format. */
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257 #define OBJECT_FORMAT_ELF
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258
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259 #undef TARGET_ASM_FILE_START
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260 #define TARGET_ASM_FILE_START pa_hpux64_hpas_file_start
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261
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262 #undef TEXT_SECTION_ASM_OP
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263 #define TEXT_SECTION_ASM_OP "\t.SUBSPA $CODE$\n"
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264 #undef READONLY_DATA_SECTION_ASM_OP
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265 #define READONLY_DATA_SECTION_ASM_OP "\t.SUBSPA $LIT$\n"
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266 #undef DATA_SECTION_ASM_OP
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267 #define DATA_SECTION_ASM_OP "\t.SUBSPA $DATA$\n"
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268 #undef BSS_SECTION_ASM_OP
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269 #define BSS_SECTION_ASM_OP "\t.SUBSPA $BSS$\n"
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270
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271 /* We provide explicit defines for CTORS_SECTION_ASM_OP and
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272 DTORS_SECTION_ASM_OP since we don't yet have support for
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273 named sections with the HP assembler. */
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274 #undef CTORS_SECTION_ASM_OP
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275 #define CTORS_SECTION_ASM_OP "\t.SUBSPA \\.ctors,QUAD=1,ALIGN=8,ACCESS=31"
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276 #undef DTORS_SECTION_ASM_OP
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277 #define DTORS_SECTION_ASM_OP "\t.SUBSPA \\.dtors,QUAD=1,ALIGN=8,ACCESS=31"
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278
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279 #define HP_INIT_ARRAY_SECTION_ASM_OP \
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280 "\t.SUBSPA \\.init,QUAD=1,ALIGN=8,ACCESS=31"
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281 #define GNU_INIT_ARRAY_SECTION_ASM_OP \
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282 "\t.SUBSPA \\.init_array,QUAD=1,ALIGN=8,ACCESS=31"
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283 #define HP_FINI_ARRAY_SECTION_ASM_OP \
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284 "\t.SUBSPA \\.fini,QUAD=1,ALIGN=8,ACCESS=31"
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285 #define GNU_FINI_ARRAY_SECTION_ASM_OP \
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286 "\t.SUBSPA \\.fini_array,QUAD=1,ALIGN=8,ACCESS=31"
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287
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288 #endif /* USING_ELFOS_H */
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289
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290 /* The following defines, used to run constructors and destructors with
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291 the SOM linker under HP-UX 11, are not needed. */
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292 #undef HAS_INIT_SECTION
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293 #undef LD_INIT_SWITCH
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294 #undef LD_FINI_SWITCH
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295
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296 /* The following STARTFILE_SPEC and ENDFILE_SPEC defines provide the
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297 magic needed to run initializers and finalizers. */
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298 #undef STARTFILE_SPEC
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299 #if TARGET_HPUX_11_11
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300 #define STARTFILE_SPEC \
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301 "%{!shared: %{!symbolic: crt0%O%s} %{munix=95:unix95.o%s} \
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302 %{!munix=93:%{!munix=95:unix98%O%s}}} %{static:crtbeginT%O%s} \
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303 %{!static:%{!shared:crtbegin%O%s} %{shared:crtbeginS%O%s}}"
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304 #else
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305 #define STARTFILE_SPEC \
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306 "%{!shared: %{!symbolic: crt0%O%s} %{munix=95:unix95%O%s}} \
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307 %{static:crtbeginT%O%s} %{!static:%{!shared:crtbegin%O%s} \
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308 %{shared:crtbeginS%O%s}}"
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309 #endif
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310 #undef ENDFILE_SPEC
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311 #define ENDFILE_SPEC "%{!shared:crtend%O%s} %{shared:crtendS%O%s}"
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312
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313 /* Since HP uses the .init and .fini sections for array initializers
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314 and finalizers, we need different defines for INIT_SECTION_ASM_OP
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315 and FINI_SECTION_ASM_OP. With the implementation adopted below,
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316 the sections are not actually used. However, we still must provide
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317 defines to select the proper code path. */
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318 #undef INIT_SECTION_ASM_OP
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319 #define INIT_SECTION_ASM_OP
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320 #undef FINI_SECTION_ASM_OP
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321 #define FINI_SECTION_ASM_OP
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322
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323 /* We are using array initializers and don't want calls in the INIT
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324 and FINI sections. */
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325 #undef CRT_CALL_STATIC_FUNCTION
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326 #define CRT_CALL_STATIC_FUNCTION(SECTION_OP, FUNC)
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327
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328 /* The init_priority attribute is not supported with HP ld. This could be
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329 supported if collect2 was used with LD_INIT_SWITCH. Unfortunately, this
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330 approach doesn't work with GNU ld since HP-UX doesn't support DT_INIT,
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331 and therefore the -init and -fini GNU ld switches. */
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332 #undef SUPPORTS_INIT_PRIORITY
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333 #define SUPPORTS_INIT_PRIORITY (TARGET_GNU_LD ? 1 : 0)
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334
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335 /* We use DTOR_LIST_BEGIN to carry a bunch of hacks to allow us to use
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336 the init and fini array sections with both the HP and GNU linkers.
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337 The linkers setup the required dynamic entries in the dynamic segment
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338 and the dynamic linker does the calls. This approach avoids using
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339 collect2.
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340
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341 The first hack is to implement __do_global_ctors_aux in crtbegin as
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342 it needs to be the first entry in the init array so that it is called
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343 last. HP got the order of the init array backwards. The DT_INIT_ARRAY
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344 is supposed to be executed in the same order as the addresses appear in
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345 the array. DT_FINI_ARRAY is supposed to be executed in the opposite
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346 order.
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347
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348 The second hack is a set of plabels to implement the effect of
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349 CRT_CALL_STATIC_FUNCTION. HP-UX 11 only supports DI_INIT_ARRAY and
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350 DT_FINI_ARRAY and they put the arrays in .init and .fini, rather than
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351 in .init_array and .fini_array. The standard defines for .init and
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352 .fini have the execute flag set. So, the assembler has to be hacked
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353 to munge the standard flags for these sections to make them agree
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354 with what the HP linker expects. With the GNU linker, we need to
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355 used the .init_array and .fini_array sections. So, we set up for
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356 both just in case. Once we have built the table, the linker does
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357 the rest of the work.
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358
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359 The order is significant. Placing __do_global_ctors_aux first in
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360 the list, results in it being called last. User specified initializers,
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361 either using the linker +init command or a plabel, run before the
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362 initializers specified here. */
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363
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364 /* We need to add frame_dummy to the initializer list if EH_FRAME_SECTION_NAME
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365 or JCR_SECTION_NAME is defined. */
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366 #if defined(EH_FRAME_SECTION_NAME) || defined(JCR_SECTION_NAME)
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367 #define PA_INIT_FRAME_DUMMY_ASM_OP ".dword P%frame_dummy"
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368 #else
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369 #define PA_INIT_FRAME_DUMMY_ASM_OP ""
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370 #endif
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371
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372 /* The following hack sets up the .init, .init_array, .fini and
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373 .fini_array sections. */
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374 #define PA_CRTBEGIN_HACK \
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375 asm (TEXT_SECTION_ASM_OP); \
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376 static void __attribute__((used)) \
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377 __do_global_ctors_aux (void) \
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378 { \
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379 func_ptr *p = __CTOR_LIST__; \
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380 while (*(p + 1)) \
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381 p++; \
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382 for (; *p != (func_ptr) -1; p--) \
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383 (*p) (); \
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384 } \
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385 \
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386 asm (HP_INIT_ARRAY_SECTION_ASM_OP); \
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387 asm (".align 8"); \
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388 asm (".dword P%__do_global_ctors_aux"); \
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389 asm (PA_INIT_FRAME_DUMMY_ASM_OP); \
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390 asm (GNU_INIT_ARRAY_SECTION_ASM_OP); \
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391 asm (".align 8"); \
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392 asm (".dword P%__do_global_ctors_aux"); \
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393 asm (PA_INIT_FRAME_DUMMY_ASM_OP); \
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394 asm (HP_FINI_ARRAY_SECTION_ASM_OP); \
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395 asm (".align 8"); \
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396 asm (".dword P%__do_global_dtors_aux"); \
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397 asm (GNU_FINI_ARRAY_SECTION_ASM_OP); \
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398 asm (".align 8"); \
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399 asm (".dword P%__do_global_dtors_aux")
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400
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401 /* The following two variants of DTOR_LIST_BEGIN are identical to those
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402 in crtstuff.c except for the addition of the above crtbegin hack. */
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403 #ifdef DTORS_SECTION_ASM_OP
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404 #define DTOR_LIST_BEGIN \
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405 asm (DTORS_SECTION_ASM_OP); \
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406 STATIC func_ptr __DTOR_LIST__[1] \
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407 __attribute__ ((aligned(sizeof(func_ptr)))) \
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408 = { (func_ptr) (-1) }; \
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409 PA_CRTBEGIN_HACK
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410 #else
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411 #define DTOR_LIST_BEGIN \
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412 STATIC func_ptr __DTOR_LIST__[1] \
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413 __attribute__ ((section(".dtors"), aligned(sizeof(func_ptr)))) \
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414 = { (func_ptr) (-1) }; \
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415 PA_CRTBEGIN_HACK
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416 #endif
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417
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418 /* If using HP ld do not call pxdb. Use size as a program that does nothing
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419 and returns 0. /bin/true cannot be used because it is a script without
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420 an interpreter. */
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421 #define INIT_ENVIRONMENT "LD_PXDB=/usr/ccs/bin/size"
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422
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423 /* The HPUX dynamic linker objects to undefined weak symbols, so do
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424 not use them in gthr-posix.h. */
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425 #define GTHREAD_USE_WEAK 0
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426
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427 /* We don't want undefined weak references to __register_frame_info,
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428 __deregister_frame_info, _Jv_RegisterClasses and __cxa_finalize
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429 introduced by crtbegin.o. The GNU linker only resolves weak
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430 references if they appear in a shared library. Thus, it would be
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431 impossible to create a static executable if the symbols were weak.
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432 So, the best solution seems to be to make the symbols strong and
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433 provide an archive library of empty stub functions. */
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434 #define TARGET_ATTRIBUTE_WEAK
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