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annotate packages/services/loader/current/include/ppc_elf.h @ 208:e0c0827131d1 ecos

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Merge from eCos master repository on 2002-05-20-20:11:54-BST
author jlarmour
date Mon, 20 May 2002 22:19:26 +0000
parents 022f1e506033
children d2c90368aeef
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1 #ifndef CYGONCE_LOADER_PPC_ELF_H
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2 #define CYGONCE_LOADER_PPC_ELF_H
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3
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4 //==========================================================================
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5 //
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6 // ppc_elf.h
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7 //
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8 // PowerPC specific ELF file format support
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9 //
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10 //==========================================================================
208
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11 //####ECOSGPLCOPYRIGHTBEGIN####
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12 // -------------------------------------------
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13 // This file is part of eCos, the Embedded Configurable Operating System.
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14 // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
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15 //
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16 // eCos is free software; you can redistribute it and/or modify it under
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17 // the terms of the GNU General Public License as published by the Free
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18 // Software Foundation; either version 2 or (at your option) any later version.
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19 //
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20 // eCos is distributed in the hope that it will be useful, but WITHOUT ANY
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21 // WARRANTY; without even the implied warranty of MERCHANTABILITY or
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22 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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23 // for more details.
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24 //
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25 // You should have received a copy of the GNU General Public License along
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26 // with eCos; if not, write to the Free Software Foundation, Inc.,
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27 // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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28 //
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29 // As a special exception, if other files instantiate templates or use macros
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30 // or inline functions from this file, or you compile this file and link it
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31 // with other works to produce a work based on this file, this file does not
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32 // by itself cause the resulting work to be covered by the GNU General Public
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33 // License. However the source code for this file must still be made available
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34 // in accordance with section (3) of the GNU General Public License.
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35 //
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36 // This exception does not invalidate any other reasons why a work based on
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37 // this file might be covered by the GNU General Public License.
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38 //
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39 // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
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40 // at http://sources.redhat.com/ecos/ecos-license
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41 // -------------------------------------------
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42 //####ECOSGPLCOPYRIGHTEND####
184
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43 //==========================================================================
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44 //#####DESCRIPTIONBEGIN####
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45 //
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46 // Author(s): nickg
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47 // Contributors: nickg
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48 // Date: 2000-11-20
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49 // Purpose: Define PowerPC ELF support
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50 // Description: This file contains definitions for configuring the dynamic
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51 // loader to deal with the PowerPC specific parts of the ELF
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52 // file format.
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53 //
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54 // Usage:
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55 // #include <cyg/loader/ppc_elf.h>
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56 // ...
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57 //
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58 //
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59 //####DESCRIPTIONEND####
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60 //
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61 //==========================================================================
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62
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63 #include <pkgconf/system.h>
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64 #include <pkgconf/hal.h>
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65
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66 #if defined(CYGPKG_HAL_POWERPC)
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67
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68 #ifndef CYG_LOADER_DYNAMIC_LD
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69
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70 #include <cyg/infra/cyg_type.h>
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71
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72 //--------------------------------------------------------------------------
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73 // Basic definitions
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74
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75 #define CYG_ELF_MACHINE EM_PPC
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76
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77 //--------------------------------------------------------------------------
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78 // Relocation types
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79 // Taken from binutils/include/elf/ppc.h - not currently sure which
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80 // of these are actually used in executables.
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81
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82
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83 #define R_PPC_NONE 0
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84 #define R_PPC_ADDR32 1
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85 #define R_PPC_ADDR24 2
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86 #define R_PPC_ADDR16 3
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87 #define R_PPC_ADDR16_LO 4
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88 #define R_PPC_ADDR16_HI 5
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89 #define R_PPC_ADDR16_HA 6
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90 #define R_PPC_ADDR14 7
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91 #define R_PPC_ADDR14_BRTAKEN 8
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92 #define R_PPC_ADDR14_BRNTAKEN 9
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93 #define R_PPC_REL24 10
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94 #define R_PPC_REL14 11
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95 #define R_PPC_REL14_BRTAKEN 12
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96 #define R_PPC_REL14_BRNTAKEN 13
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97 #define R_PPC_GOT16 14
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98 #define R_PPC_GOT16_LO 15
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99 #define R_PPC_GOT16_HI 16
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100 #define R_PPC_GOT16_HA 17
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101 #define R_PPC_PLTREL24 18
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102 #define R_PPC_COPY 19
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103 #define R_PPC_GLOB_DAT 20
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104 #define R_PPC_JMP_SLOT 21
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105 #define R_PPC_RELATIVE 22
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106 #define R_PPC_LOCAL24PC 23
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107 #define R_PPC_UADDR32 24
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108 #define R_PPC_UADDR16 25
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109 #define R_PPC_REL32 26
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110 #define R_PPC_PLT32 27
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111 #define R_PPC_PLTREL32 28
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112 #define R_PPC_PLT16_LO 29
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113 #define R_PPC_PLT16_HI 30
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114 #define R_PPC_PLT16_HA 31
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115 #define R_PPC_SDAREL16 32
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116 #define R_PPC_SECTOFF 33
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117 #define R_PPC_SECTOFF_LO 34
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118 #define R_PPC_SECTOFF_HI 35
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119 #define R_PPC_SECTOFF_HA 36
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120
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121 /* The remaining relocs are from the Embedded ELF ABI, and are not
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122 in the SVR4 ELF ABI. */
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123 #define R_PPC_EMB_NADDR32 101
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124 #define R_PPC_EMB_NADDR16 102
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125 #define R_PPC_EMB_NADDR16_LO 103
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126 #define R_PPC_EMB_NADDR16_HI 104
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127 #define R_PPC_EMB_NADDR16_HA 105
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128 #define R_PPC_EMB_SDAI16 106
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129 #define R_PPC_EMB_SDA2I16 107
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130 #define R_PPC_EMB_SDA2REL 108
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131 #define R_PPC_EMB_SDA21 109
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132 #define R_PPC_EMB_MRKREF 110
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133 #define R_PPC_EMB_RELSEC16 111
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134 #define R_PPC_EMB_RELST_LO 112
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135 #define R_PPC_EMB_RELST_HI 113
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136 #define R_PPC_EMB_RELST_HA 114
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137 #define R_PPC_EMB_BIT_FLD 115
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138 #define R_PPC_EMB_RELSDA 116
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139
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140 /* These are GNU extensions to enable C++ vtable garbage collection. */
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141 #define R_PPC_GNU_VTINHERIT 253
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142 #define R_PPC_GNU_VTENTRY 254
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143
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144 /* This is a phony reloc to handle any old fashioned TOC16 references
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145 that may still be in object files. */
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146 #define R_PPC_TOC16 255
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147
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148
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149 //--------------------------------------------------------------------------
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150 // Processor specific customization class for Cyg_LoadObject class.
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151
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152 #ifdef __cplusplus
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153
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154 class Cyg_LoadObject_Proc :
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155 public Cyg_LoadObject_Base
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156 {
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157 public:
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158
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159 inline Cyg_LoadObject_Proc()
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160 : Cyg_LoadObject_Base()
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161 {
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162 };
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163
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164 inline Cyg_LoadObject_Proc( Cyg_LoaderStream& stream,
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165 cyg_uint32 mode,
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166 Cyg_LoaderMemAlloc *mem )
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167 : Cyg_LoadObject_Base( stream, mode, mem )
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168 {
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169 };
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170
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171 inline ~Cyg_LoadObject_Proc() {};
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172
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173 cyg_code apply_rel( unsigned char type, Elf32_Word sym, Elf32_Addr offset );
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174
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175 cyg_code apply_rela( unsigned char type, Elf32_Word sym,
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176 Elf32_Addr offset, Elf32_Sword addend );
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177 };
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178
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179 //--------------------------------------------------------------------------
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180
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181 inline cyg_code Cyg_LoadObject_Proc::apply_rel( unsigned char type,
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182 Elf32_Word sym,
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183 Elf32_Addr offset )
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184 {
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185 return 0;
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186 }
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187
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188 inline cyg_code Cyg_LoadObject_Proc::apply_rela( unsigned char type,
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189 Elf32_Word sym,
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190 Elf32_Addr offset,
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191 Elf32_Sword addend )
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192 {
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193 return 0; // CYG_LOADERR_INVALID_RELOC;
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194 }
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195
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196 //--------------------------------------------------------------------------
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197
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198 externC void abort() CYGBLD_ATTRIB_WEAK;
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199
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200 externC void abort() { for(;;); }
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201
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202 externC int strcmp(const char *a, const char *b) CYGBLD_ATTRIB_WEAK;
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203
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204 externC int strcmp(const char *a, const char *b) { return a==b; }
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205
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206 externC unsigned int strlen(const char *a) CYGBLD_ATTRIB_WEAK;
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207
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208 externC unsigned int strlen(const char *a) { return 1; }
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209
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210 //--------------------------------------------------------------------------
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211
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212 #endif // __cplusplus
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213
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214 #else // CYG_LOADER_DYNAMIC_LD
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215
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216 //--------------------------------------------------------------------------
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217
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218 #define CYG_LOADER_DYNAMIC_PREFIX \
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219 OUTPUT_FORMAT("elf32-powerpc", "elf32-powerpc", "elf32-powerpc") \
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220 OUTPUT_ARCH("powerpc")
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221
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222 /* Adjust the address for the data segment. We want to adjust up to
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223 the same address within the page on the next page up. */
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224 #define CYG_LOADER_DYNAMIC_DATA_ALIGN \
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225 . = ALIGN(0x1000) + (. & (0x1000 - 1));
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226
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227 //--------------------------------------------------------------------------
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228
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229 #endif // CYG_LOADER_DYNAMIC_LD
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230
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231 #endif // defined(CYGPKG_HAL_POWERPC) && __cplusplus
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232
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233 //--------------------------------------------------------------------------
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234 #endif // ifndef CYGONCE_LOADER_PPC_ELF_H
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235 // End of ppc_elf.h