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annotate packages/services/loader/current/src/dload.cxx @ 3292:7f8e529b4d82 default tip

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Fix FREESCALE_EDMA_NBYTES_MLOFFYES_MLOFF() so it works with negative offsets.
author vae
date Wed, 29 Apr 2015 23:31:48 +0000
parents 74dbf4c3f2e1
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 //==========================================================================
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2 //
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3 // dload.cxx
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4 //
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5 // Dynamic loader API
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6 //
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7 //==========================================================================
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8 // ####ECOSGPLCOPYRIGHTBEGIN####
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9 // -------------------------------------------
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10 // This file is part of eCos, the Embedded Configurable Operating System.
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11 // Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
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12 //
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13 // eCos is free software; you can redistribute it and/or modify it under
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14 // the terms of the GNU General Public License as published by the Free
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15 // Software Foundation; either version 2 or (at your option) any later
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16 // version.
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17 //
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18 // eCos is distributed in the hope that it will be useful, but WITHOUT
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19 // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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20 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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21 // for more details.
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22 //
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23 // You should have received a copy of the GNU General Public License
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24 // along with eCos; if not, write to the Free Software Foundation, Inc.,
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25 // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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26 //
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27 // As a special exception, if other files instantiate templates or use
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28 // macros or inline functions from this file, or you compile this file
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29 // and link it with other works to produce a work based on this file,
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30 // this file does not by itself cause the resulting work to be covered by
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31 // the GNU General Public License. However the source code for this file
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32 // must still be made available in accordance with section (3) of the GNU
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33 // General Public License v2.
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34 //
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35 // This exception does not invalidate any other reasons why a work based
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36 // on this file might be covered by the GNU General Public License.
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37 // -------------------------------------------
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38 // ####ECOSGPLCOPYRIGHTEND####
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39 //==========================================================================
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40 //#####DESCRIPTIONBEGIN####
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41 //
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42 // Author(s): nickg
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43 // Contributors: nickg
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44 // Date: 2000-11-03
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45 // Purpose: Loader class implementation
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46 // Description: This file contains the dynamic ELF loader API.
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47 // This presents the standard dlxxx() calls by invoking
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48 // the loader classes as appropriate.
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49 //
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50 //
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51 //
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52 //####DESCRIPTIONEND####
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53 //
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54 //==========================================================================
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55
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56 #include <pkgconf/hal.h>
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57 #include <pkgconf/kernel.h>
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58 #include <pkgconf/isoinfra.h>
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59
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60 #include <cyg/kernel/ktypes.h> // base kernel types
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61 #include <cyg/infra/cyg_trac.h> // tracing macros
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62 #include <cyg/infra/cyg_ass.h> // assertion macros
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63
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64 #include <string.h>
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65
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66 #include <cyg/loader/loader.hxx> // Loader header
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67
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68 #include <sys/types.h>
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69 #include <sys/stat.h>
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70 #include <fcntl.h>
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71 #include <unistd.h>
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72 #include <dlfcn.h> // API definitions
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73
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74 // =========================================================================
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75 // Cyg_LoaderStream_File class
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76
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77 // =========================================================================
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78 // API calls
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79
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80 cyg_uint32 global_symbol_object;
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81
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82 // =========================================================================
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83 // Load and open object
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84
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85 __externC void *dlopen (const char *file, int mode)
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86 {
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87 CYG_REPORT_FUNCTION();
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88
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89 void *ret = NULL;
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90
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91 if( file == NULL )
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92 {
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93 // Special case to allow access to all symbols.
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94
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95 ret = (void *)&global_symbol_object;
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96 }
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97 #ifdef CYGPKG_IO_FILEIO
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98 else
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99 {
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100 int fd = open( file, O_RDONLY );
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101
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102 if( fd < 0 )
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103 return NULL;
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104
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105 Cyg_LoaderStream_File filestream( fd );
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106
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107 Cyg_LoadObject *obj;
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108
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109 cyg_code error = Cyg_Loader::loader->load( filestream, mode, &obj );
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110
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111 if( error == 0)
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112 {
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113 ret = (void *)obj;
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114 }
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115
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116 close( fd );
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117 }
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118 #endif
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119
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120 CYG_REPORT_RETVAL(ret);
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121 return ret;
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122 }
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123
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124 // =========================================================================
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125
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126 __externC void *dlopenmem(const void *addr, size_t size, int mode)
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127 {
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128 CYG_REPORT_FUNCTION();
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129
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130 void *ret = NULL;
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131
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132 Cyg_LoaderStream_Mem memstream( addr, size );
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133
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134 Cyg_LoadObject *obj;
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135
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136 cyg_code error = Cyg_Loader::loader->load( memstream, mode, &obj );
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137
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138 if( error == 0)
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139 ret = (void *)obj;
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140
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141 CYG_REPORT_RETVAL(ret);
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142 return ret;
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143 }
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144
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145 // =========================================================================
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146
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147 __externC int dlclose (void *handle)
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148 {
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149 CYG_REPORT_FUNCTION();
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150
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151 int ret = 0;
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152
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153 if( handle == (void *)global_symbol_object )
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154 {
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155 // Nothing to do here...
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156 }
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157 else
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158 {
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159 Cyg_LoadObject *obj = (Cyg_LoadObject *)handle;
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160
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161 Cyg_Loader::loader->close( obj );
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162 }
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163
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164 CYG_REPORT_RETVAL(ret);
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165 return ret;
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166 }
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167
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168 // =========================================================================
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169
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170 __externC void *dlsym (void *handle, const char *name)
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171 {
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172 CYG_REPORT_FUNCTION();
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173
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174 void *ret = NULL;
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175
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176 Cyg_LoadObject *obj = (Cyg_LoadObject *)handle;
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177
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178 ret = obj->symbol( name );
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179
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180 CYG_REPORT_RETVAL(ret);
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181 return ret;
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182 }
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183
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184 // =========================================================================
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185
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186 __externC const char *dlerror (void)
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187 {
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188 CYG_REPORT_FUNCTION();
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189
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190 const char *ret = Cyg_Loader::loader->error_string();
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191
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192 CYG_REPORT_RETVAL(ret);
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193 return ret;
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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 // EOF dload.cxx