1 | /* |
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2 | * COPYRIGHT (c) 2012 Chris Johns <chrisj@rtems.org> |
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3 | * |
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4 | * The license and distribution terms for this file may be |
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5 | * found in the file LICENSE in this distribution or at |
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6 | * http://www.rtems.com/license/LICENSE. |
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7 | */ |
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8 | /** |
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9 | * @file |
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10 | * |
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11 | * @ingroup rtl |
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12 | * |
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13 | * @brief RTEMS Run-Time Linker Error |
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14 | */ |
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15 | |
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16 | #if HAVE_CONFIG_H |
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17 | #include "config.h" |
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18 | #endif |
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19 | |
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20 | #include <errno.h> |
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21 | #include <inttypes.h> |
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22 | #include <stdlib.h> |
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23 | #include <stdio.h> |
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24 | |
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25 | #include <rtems/libio_.h> |
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26 | |
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27 | #include <rtems/rtl/rtl.h> |
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28 | #include "rtl-chain-iterator.h" |
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29 | #include "rtl-obj.h" |
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30 | #include "rtl-error.h" |
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31 | #include "rtl-find-file.h" |
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32 | #include "rtl-string.h" |
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33 | #include "rtl-trace.h" |
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34 | |
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35 | #if RTEMS_RTL_RAP_LOADER |
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36 | #include "rtl-rap.h" |
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37 | #define RTEMS_RTL_RAP_LOADER_COUNT 1 |
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38 | #else |
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39 | #define RTEMS_RTL_RAP_LOADER_COUNT 0 |
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40 | #endif |
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41 | |
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42 | #if RTEMS_RTL_ELF_LOADER |
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43 | #include "rtl-elf.h" |
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44 | #define RTEMS_RTL_ELF_LOADER_COUNT 1 |
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45 | #else |
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46 | #define RTEMS_RTL_ELF_LOADER_COUNT 0 |
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47 | #endif |
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48 | |
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49 | /** |
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50 | * The table of supported loader formats. |
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51 | */ |
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52 | static rtems_rtl_loader_table_t loaders[RTEMS_RTL_ELF_LOADER_COUNT + |
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53 | RTEMS_RTL_RAP_LOADER_COUNT] = |
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54 | { |
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55 | #if RTEMS_RTL_RAP_LOADER |
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56 | { rtems_rtl_rap_file_check, rtems_rtl_rap_file_load, rtems_rtl_rap_file_sig }, |
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57 | #endif |
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58 | #if RTEMS_RTL_ELF_LOADER |
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59 | { rtems_rtl_elf_file_check, rtems_rtl_elf_file_load, rtems_rtl_elf_file_sig }, |
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60 | #endif |
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61 | }; |
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62 | |
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63 | rtems_rtl_obj_t* |
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64 | rtems_rtl_obj_alloc (void) |
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65 | { |
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66 | rtems_rtl_obj_t* obj = rtems_rtl_alloc_new (RTEMS_RTL_ALLOC_OBJECT, |
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67 | sizeof (rtems_rtl_obj_t), |
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68 | true); |
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69 | if (obj) |
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70 | { |
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71 | /* |
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72 | * Initialise the chains. |
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73 | */ |
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74 | rtems_chain_initialize_empty (&obj->sections); |
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75 | } |
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76 | return obj; |
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77 | } |
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78 | |
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79 | static void |
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80 | rtems_rtl_obj_free_names (rtems_rtl_obj_t* obj) |
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81 | { |
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82 | if (rtems_rtl_obj_oname_valid (obj)) |
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83 | rtems_rtl_alloc_del (RTEMS_RTL_ALLOC_OBJECT, (void*) obj->oname); |
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84 | if (rtems_rtl_obj_aname_valid (obj)) |
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85 | rtems_rtl_alloc_del (RTEMS_RTL_ALLOC_OBJECT, (void*) obj->aname); |
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86 | if (rtems_rtl_obj_fname_valid (obj)) |
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87 | rtems_rtl_alloc_del (RTEMS_RTL_ALLOC_OBJECT, (void*) obj->fname); |
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88 | } |
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89 | |
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90 | bool |
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91 | rtems_rtl_obj_free (rtems_rtl_obj_t* obj) |
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92 | { |
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93 | if (obj->users || ((obj->flags & RTEMS_RTL_OBJ_LOCKED) != 0)) |
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94 | { |
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95 | rtems_rtl_set_error (EINVAL, "cannot free obj still in use"); |
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96 | return false; |
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97 | } |
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98 | if (!rtems_chain_is_node_off_chain (&obj->link)) |
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99 | rtems_chain_extract (&obj->link); |
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100 | rtems_rtl_alloc_module_del (&obj->text_base, &obj->const_base, |
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101 | &obj->data_base, &obj->bss_base); |
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102 | rtems_rtl_symbol_obj_erase (obj); |
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103 | rtems_rtl_obj_free_names (obj); |
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104 | if (obj->sec_num) |
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105 | free (obj->sec_num); |
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106 | if (obj->detail) |
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107 | rtems_rtl_alloc_del (RTEMS_RTL_ALLOC_OBJECT, (void*)obj->detail); |
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108 | rtems_rtl_alloc_del (RTEMS_RTL_ALLOC_OBJECT, obj); |
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109 | return true; |
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110 | } |
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111 | |
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112 | bool |
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113 | rtems_rtl_obj_unresolved (rtems_rtl_obj_t* obj) |
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114 | { |
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115 | return (obj->flags & RTEMS_RTL_OBJ_UNRESOLVED) != 0 ? true : false; |
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116 | } |
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117 | |
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118 | bool |
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119 | rtems_rtl_parse_name (const char* name, |
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120 | const char** aname, |
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121 | const char** oname, |
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122 | off_t* ooffset) |
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123 | { |
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124 | const char* laname = NULL; |
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125 | const char* loname = NULL; |
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126 | const char* colon; |
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127 | const char* end; |
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128 | |
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129 | /* |
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130 | * Parse the name to determine if the object file is part of an archive or it |
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131 | * is an object file. If an archive check the name for a '@' to see if the |
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132 | * archive contains an offset. |
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133 | */ |
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134 | end = name + strlen (name); |
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135 | colon = strrchr (name, ':'); |
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136 | if (colon == NULL || colon < strrchr(name, '/')) |
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137 | colon = end; |
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138 | |
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139 | loname = rtems_rtl_alloc_new (RTEMS_RTL_ALLOC_OBJECT, colon - name + 1, true); |
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140 | if (!oname) |
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141 | { |
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142 | rtems_rtl_set_error (ENOMEM, "no memory for object file name"); |
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143 | return false; |
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144 | } |
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145 | |
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146 | memcpy ((void*) loname, name, colon - name); |
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147 | |
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148 | /* |
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149 | * If the pointers match there is no ':' delimiter. |
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150 | */ |
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151 | if (colon != end) |
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152 | { |
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153 | const char* at; |
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154 | |
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155 | /* |
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156 | * The file name is an archive and the object file name is next after the |
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157 | * delimiter. Move the pointer to the archive name. |
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158 | */ |
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159 | laname = loname; |
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160 | ++colon; |
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161 | |
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162 | /* |
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163 | * See if there is a '@' to delimit an archive offset for the object in the |
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164 | * archive. |
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165 | */ |
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166 | at = strchr (colon, '@'); |
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167 | |
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168 | if (at == NULL) |
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169 | at = end; |
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170 | |
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171 | |
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172 | loname = rtems_rtl_alloc_new (RTEMS_RTL_ALLOC_OBJECT, at - colon + 1, true); |
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173 | if (!loname) |
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174 | { |
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175 | rtems_rtl_alloc_del (RTEMS_RTL_ALLOC_OBJECT, (void*) laname); |
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176 | rtems_rtl_set_error (ENOMEM, "no memory for object file name"); |
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177 | return false; |
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178 | } |
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179 | |
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180 | memcpy ((void*) loname, colon, at - colon); |
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181 | |
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182 | if (at != end) |
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183 | { |
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184 | /* |
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185 | * The object name has an archive offset. If the number |
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186 | * does not parse 0 will be returned and the archive will be |
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187 | * searched. |
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188 | */ |
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189 | *ooffset = strtoul (at + 1, 0, 0); |
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190 | } |
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191 | } |
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192 | |
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193 | *oname = loname; |
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194 | *aname = laname; |
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195 | return true; |
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196 | } |
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197 | |
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198 | static bool |
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199 | rtems_rtl_obj_parse_name (rtems_rtl_obj_t* obj, const char* name) |
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200 | { |
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201 | return rtems_rtl_parse_name (name, &(obj->aname), &(obj->oname), &(obj->ooffset)); |
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202 | } |
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203 | |
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204 | static bool |
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205 | rtems_rtl_seek_read (int fd, off_t off, size_t len, uint8_t* buffer) |
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206 | { |
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207 | if (lseek (fd, off, SEEK_SET) < 0) |
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208 | return false; |
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209 | if (read (fd, buffer, len) != len) |
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210 | return false; |
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211 | return true; |
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212 | } |
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213 | |
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214 | /** |
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215 | * Scan the decimal number returning the value found. |
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216 | */ |
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217 | static uint64_t |
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218 | rtems_rtl_scan_decimal (const uint8_t* string, size_t len) |
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219 | { |
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220 | uint64_t value = 0; |
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221 | |
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222 | while (len && (*string != ' ')) |
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223 | { |
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224 | value *= 10; |
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225 | value += *string - '0'; |
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226 | ++string; |
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227 | --len; |
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228 | } |
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229 | |
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230 | return value; |
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231 | } |
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232 | |
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233 | /** |
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234 | * Align the size to the next alignment point. Assume the alignment is a |
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235 | * positive integral power of 2 if not 0 or 1. If 0 or 1 then there is no |
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236 | * alignment. |
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237 | */ |
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238 | static size_t |
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239 | rtems_rtl_sect_align (size_t offset, uint32_t alignment) |
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240 | { |
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241 | if ((alignment > 1) && ((offset & ~alignment) != 0)) |
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242 | offset = (offset + alignment) & ~(alignment - 1); |
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243 | return offset; |
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244 | } |
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245 | |
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246 | /** |
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247 | * Section size summer iterator data. |
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248 | */ |
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249 | typedef struct |
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250 | { |
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251 | uint32_t mask; /**< The selection mask to sum. */ |
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252 | size_t size; /**< The size of all section fragments. */ |
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253 | } rtems_rtl_obj_sect_summer_t; |
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254 | |
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255 | static bool |
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256 | rtems_rtl_obj_sect_summer (rtems_chain_node* node, void* data) |
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257 | { |
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258 | rtems_rtl_obj_sect_t* sect = (rtems_rtl_obj_sect_t*) node; |
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259 | rtems_rtl_obj_sect_summer_t* summer = data; |
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260 | if ((sect->flags & summer->mask) == summer->mask) |
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261 | summer->size = |
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262 | rtems_rtl_sect_align (summer->size, sect->alignment) + sect->size; |
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263 | return true; |
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264 | } |
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265 | |
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266 | static size_t |
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267 | rtems_rtl_obj_section_size (rtems_rtl_obj_t* obj, uint32_t mask) |
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268 | { |
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269 | rtems_rtl_obj_sect_summer_t summer; |
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270 | summer.mask = mask; |
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271 | summer.size = 0; |
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272 | rtems_rtl_chain_iterate (&obj->sections, |
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273 | rtems_rtl_obj_sect_summer, |
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274 | &summer); |
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275 | return summer.size; |
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276 | } |
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277 | |
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278 | /** |
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279 | * Section alignment iterator data. The first section's alignment sets the |
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280 | * alignment for that type of section. |
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281 | */ |
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282 | typedef struct |
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283 | { |
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284 | uint32_t mask; /**< The selection mask to look for alignment. */ |
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285 | uint32_t alignment; /**< The alignment of the section type. */ |
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286 | } rtems_rtl_obj_sect_aligner_t; |
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287 | |
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288 | /** |
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289 | * The section aligner iterator. |
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290 | */ |
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291 | static bool |
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292 | rtems_rtl_obj_sect_aligner (rtems_chain_node* node, void* data) |
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293 | { |
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294 | rtems_rtl_obj_sect_t* sect = (rtems_rtl_obj_sect_t*) node; |
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295 | rtems_rtl_obj_sect_aligner_t* aligner = data; |
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296 | if ((sect->flags & aligner->mask) == aligner->mask) |
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297 | { |
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298 | aligner->alignment = sect->alignment; |
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299 | return false; |
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300 | } |
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301 | return true; |
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302 | } |
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303 | |
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304 | static size_t |
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305 | rtems_rtl_obj_section_alignment (rtems_rtl_obj_t* obj, uint32_t mask) |
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306 | { |
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307 | rtems_rtl_obj_sect_aligner_t aligner; |
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308 | aligner.mask = mask; |
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309 | aligner.alignment = 0; |
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310 | rtems_rtl_chain_iterate (&obj->sections, |
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311 | rtems_rtl_obj_sect_aligner, |
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312 | &aligner); |
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313 | return aligner.alignment; |
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314 | } |
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315 | |
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316 | static bool |
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317 | rtems_rtl_obj_section_handler (uint32_t mask, |
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318 | rtems_rtl_obj_t* obj, |
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319 | int fd, |
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320 | rtems_rtl_obj_sect_handler_t handler, |
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321 | void* data) |
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322 | { |
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323 | rtems_chain_node* node = rtems_chain_first (&obj->sections); |
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324 | while (!rtems_chain_is_tail (&obj->sections, node)) |
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325 | { |
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326 | rtems_rtl_obj_sect_t* sect = (rtems_rtl_obj_sect_t*) node; |
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327 | if ((sect->flags & mask) != 0) |
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328 | { |
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329 | if (!handler (obj, fd, sect, data)) |
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330 | return false; |
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331 | } |
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332 | node = rtems_chain_next (node); |
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333 | } |
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334 | return true; |
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335 | } |
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336 | |
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337 | bool |
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338 | rtems_rtl_match_name (rtems_rtl_obj_t* obj, const char* name) |
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339 | { |
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340 | const char* n1 = obj->oname; |
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341 | while ((*n1 != '\0') && (*n1 != '\n') && (*n1 != '/') && |
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342 | (*name != '\0') && (*name != '/') && (*n1 == *name)) |
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343 | { |
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344 | ++n1; |
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345 | ++name; |
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346 | } |
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347 | if (((*n1 == '\0') || (*n1 == '\n') || (*n1 == '/')) && |
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348 | ((*name == '\0') || (*name == '/'))) |
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349 | return true; |
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350 | return false; |
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351 | } |
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352 | |
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353 | bool |
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354 | rtems_rtl_obj_find_file (rtems_rtl_obj_t* obj, const char* name) |
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355 | { |
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356 | const char* pname; |
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357 | rtems_rtl_data_t* rtl; |
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358 | |
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359 | /* |
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360 | * Parse the name. The object descriptor will have the archive name and/or |
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361 | * object name fields filled in. A find of the file will result in the file |
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362 | * name (fname) field pointing to the actual file if present on the file |
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363 | * system. |
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364 | */ |
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365 | if (!rtems_rtl_obj_parse_name (obj, name)) |
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366 | return false; |
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367 | |
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368 | /* |
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369 | * If the archive field (aname) is set we use that name else we use the |
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370 | * object field (oname). If selected name is absolute we just point the aname |
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371 | * field to the fname field to that name. If the field is relative we search |
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372 | * the paths set in the RTL for the file. |
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373 | */ |
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374 | if (rtems_rtl_obj_aname_valid (obj)) |
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375 | pname = rtems_rtl_obj_aname (obj); |
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376 | else |
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377 | pname = rtems_rtl_obj_oname (obj); |
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378 | |
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379 | rtl = rtems_rtl_lock (); |
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380 | |
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381 | if (!rtems_rtl_find_file (pname, rtl->paths, &obj->fname, &obj->fsize)) |
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382 | { |
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383 | rtems_rtl_set_error (ENOENT, "file not found"); |
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384 | rtems_rtl_unlock (); |
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385 | return false; |
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386 | } |
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387 | |
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388 | rtems_rtl_unlock (); |
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389 | |
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390 | return true; |
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391 | } |
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392 | |
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393 | bool |
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394 | rtems_rtl_obj_add_section (rtems_rtl_obj_t* obj, |
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395 | int section, |
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396 | const char* name, |
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397 | size_t size, |
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398 | off_t offset, |
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399 | uint32_t alignment, |
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400 | int link, |
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401 | int info, |
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402 | uint32_t flags) |
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403 | { |
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404 | rtems_rtl_obj_sect_t* sect = rtems_rtl_alloc_new (RTEMS_RTL_ALLOC_OBJECT, |
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405 | sizeof (rtems_rtl_obj_sect_t), true); |
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406 | if (!sect) |
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407 | { |
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408 | rtems_rtl_set_error (ENOMEM, "adding allocated section"); |
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409 | return false; |
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410 | } |
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411 | sect->section = section; |
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412 | sect->name = rtems_rtl_strdup (name); |
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413 | sect->size = size; |
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414 | sect->offset = offset; |
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415 | sect->alignment = alignment; |
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416 | sect->link = link; |
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417 | sect->info = info; |
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418 | sect->flags = flags; |
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419 | sect->base = NULL; |
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420 | rtems_chain_append (&obj->sections, §->node); |
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421 | |
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422 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_SECTION)) |
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423 | printf ("rtl: sect: %-2d: %s\n", section, name); |
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424 | |
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425 | return true; |
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426 | } |
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427 | |
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428 | void |
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429 | rtems_rtl_obj_erase_sections (rtems_rtl_obj_t* obj) |
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430 | { |
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431 | rtems_chain_node* node = rtems_chain_first (&obj->sections); |
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432 | while (!rtems_chain_is_tail (&obj->sections, node)) |
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433 | { |
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434 | rtems_rtl_obj_sect_t* sect = (rtems_rtl_obj_sect_t*) node; |
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435 | rtems_chain_node* next_node = rtems_chain_next (node); |
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436 | rtems_chain_extract (node); |
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437 | rtems_rtl_alloc_del (RTEMS_RTL_ALLOC_OBJECT, (void*) sect->name); |
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438 | rtems_rtl_alloc_del (RTEMS_RTL_ALLOC_OBJECT, sect); |
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439 | node = next_node; |
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440 | } |
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441 | } |
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442 | |
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443 | /** |
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444 | * Section finder iterator data. |
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445 | */ |
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446 | typedef struct |
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447 | { |
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448 | rtems_rtl_obj_sect_t* sect; /**< The matching section. */ |
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449 | const char* name; /**< The name to match. */ |
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450 | int index; /**< The index to match. */ |
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451 | } rtems_rtl_obj_sect_finder_t; |
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452 | |
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453 | static bool |
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454 | rtems_rtl_obj_sect_match_name (rtems_chain_node* node, void* data) |
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455 | { |
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456 | rtems_rtl_obj_sect_t* sect = (rtems_rtl_obj_sect_t*) node; |
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457 | rtems_rtl_obj_sect_finder_t* match = data; |
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458 | if (strcmp (sect->name, match->name) == 0) |
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459 | { |
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460 | match->sect = sect; |
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461 | return false; |
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462 | } |
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463 | return true; |
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464 | } |
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465 | |
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466 | rtems_rtl_obj_sect_t* |
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467 | rtems_rtl_obj_find_section (rtems_rtl_obj_t* obj, const char* name) |
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468 | { |
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469 | rtems_rtl_obj_sect_finder_t match; |
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470 | match.sect = NULL; |
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471 | match.name = name; |
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472 | rtems_rtl_chain_iterate (&obj->sections, |
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473 | rtems_rtl_obj_sect_match_name, |
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474 | &match); |
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475 | return match.sect; |
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476 | } |
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477 | |
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478 | static bool |
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479 | rtems_rtl_obj_sect_match_index (rtems_chain_node* node, void* data) |
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480 | { |
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481 | rtems_rtl_obj_sect_t* sect = (rtems_rtl_obj_sect_t*) node; |
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482 | rtems_rtl_obj_sect_finder_t* match = data; |
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483 | if (sect->section == match->index) |
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484 | { |
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485 | match->sect = sect; |
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486 | return false; |
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487 | } |
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488 | return true; |
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489 | } |
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490 | |
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491 | rtems_rtl_obj_sect_t* |
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492 | rtems_rtl_obj_find_section_by_index (rtems_rtl_obj_t* obj, int index) |
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493 | { |
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494 | rtems_rtl_obj_sect_finder_t match; |
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495 | match.sect = NULL; |
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496 | match.index = index; |
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497 | rtems_rtl_chain_iterate (&obj->sections, |
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498 | rtems_rtl_obj_sect_match_index, |
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499 | &match); |
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500 | return match.sect; |
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501 | } |
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502 | |
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503 | size_t |
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504 | rtems_rtl_obj_text_size (rtems_rtl_obj_t* obj) |
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505 | { |
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506 | return rtems_rtl_obj_section_size (obj, RTEMS_RTL_OBJ_SECT_TEXT); |
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507 | } |
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508 | |
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509 | uint32_t |
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510 | rtems_rtl_obj_text_alignment (rtems_rtl_obj_t* obj) |
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511 | { |
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512 | return rtems_rtl_obj_section_alignment (obj, RTEMS_RTL_OBJ_SECT_TEXT); |
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513 | } |
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514 | |
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515 | size_t |
---|
516 | rtems_rtl_obj_const_size (rtems_rtl_obj_t* obj) |
---|
517 | { |
---|
518 | return rtems_rtl_obj_section_size (obj, RTEMS_RTL_OBJ_SECT_CONST); |
---|
519 | } |
---|
520 | |
---|
521 | uint32_t |
---|
522 | rtems_rtl_obj_const_alignment (rtems_rtl_obj_t* obj) |
---|
523 | { |
---|
524 | return rtems_rtl_obj_section_alignment (obj, RTEMS_RTL_OBJ_SECT_CONST); |
---|
525 | } |
---|
526 | |
---|
527 | size_t |
---|
528 | rtems_rtl_obj_data_size (rtems_rtl_obj_t* obj) |
---|
529 | { |
---|
530 | return rtems_rtl_obj_section_size (obj, RTEMS_RTL_OBJ_SECT_DATA); |
---|
531 | } |
---|
532 | |
---|
533 | uint32_t |
---|
534 | rtems_rtl_obj_data_alignment (rtems_rtl_obj_t* obj) |
---|
535 | { |
---|
536 | return rtems_rtl_obj_section_alignment (obj, RTEMS_RTL_OBJ_SECT_DATA); |
---|
537 | } |
---|
538 | |
---|
539 | size_t |
---|
540 | rtems_rtl_obj_bss_size (rtems_rtl_obj_t* obj) |
---|
541 | { |
---|
542 | return rtems_rtl_obj_section_size (obj, RTEMS_RTL_OBJ_SECT_BSS); |
---|
543 | } |
---|
544 | |
---|
545 | uint32_t |
---|
546 | rtems_rtl_obj_bss_alignment (rtems_rtl_obj_t* obj) |
---|
547 | { |
---|
548 | return rtems_rtl_obj_section_alignment (obj, RTEMS_RTL_OBJ_SECT_BSS); |
---|
549 | } |
---|
550 | |
---|
551 | bool |
---|
552 | rtems_rtl_obj_relocate (rtems_rtl_obj_t* obj, |
---|
553 | int fd, |
---|
554 | rtems_rtl_obj_sect_handler_t handler, |
---|
555 | void* data) |
---|
556 | { |
---|
557 | uint32_t mask = RTEMS_RTL_OBJ_SECT_REL | RTEMS_RTL_OBJ_SECT_RELA; |
---|
558 | return rtems_rtl_obj_section_handler (mask, obj, fd, handler, data); |
---|
559 | } |
---|
560 | |
---|
561 | bool |
---|
562 | rtems_rtl_obj_load_symbols (rtems_rtl_obj_t* obj, |
---|
563 | int fd, |
---|
564 | rtems_rtl_obj_sect_handler_t handler, |
---|
565 | void* data) |
---|
566 | { |
---|
567 | uint32_t mask = RTEMS_RTL_OBJ_SECT_SYM; |
---|
568 | return rtems_rtl_obj_section_handler (mask, obj, fd, handler, data); |
---|
569 | } |
---|
570 | |
---|
571 | static size_t |
---|
572 | rtems_rtl_obj_sections_loader (uint32_t mask, |
---|
573 | rtems_rtl_obj_t* obj, |
---|
574 | int fd, |
---|
575 | uint8_t* base, |
---|
576 | rtems_rtl_obj_sect_handler_t handler, |
---|
577 | void* data) |
---|
578 | { |
---|
579 | rtems_chain_control* sections = &obj->sections; |
---|
580 | rtems_chain_node* node = rtems_chain_first (sections); |
---|
581 | size_t base_offset = 0; |
---|
582 | bool first = true; |
---|
583 | while (!rtems_chain_is_tail (sections, node)) |
---|
584 | { |
---|
585 | rtems_rtl_obj_sect_t* sect = (rtems_rtl_obj_sect_t*) node; |
---|
586 | |
---|
587 | if ((sect->size != 0) && ((sect->flags & mask) != 0)) |
---|
588 | { |
---|
589 | if (!first) |
---|
590 | base_offset = rtems_rtl_sect_align (base_offset, sect->alignment); |
---|
591 | |
---|
592 | sect->base = base + base_offset; |
---|
593 | |
---|
594 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_LOAD_SECT)) |
---|
595 | printf ("rtl: loading: %s -> %8p (%zi)\n", |
---|
596 | sect->name, sect->base, sect->size); |
---|
597 | |
---|
598 | if ((sect->flags & RTEMS_RTL_OBJ_SECT_LOAD) == RTEMS_RTL_OBJ_SECT_LOAD) |
---|
599 | { |
---|
600 | if (!handler (obj, fd, sect, data)) |
---|
601 | { |
---|
602 | sect->base = 0; |
---|
603 | return false; |
---|
604 | } |
---|
605 | } |
---|
606 | else if ((sect->flags & RTEMS_RTL_OBJ_SECT_ZERO) == RTEMS_RTL_OBJ_SECT_ZERO) |
---|
607 | { |
---|
608 | memset (base + base_offset, 0, sect->size); |
---|
609 | } |
---|
610 | else |
---|
611 | { |
---|
612 | sect->base = 0; |
---|
613 | rtems_rtl_set_error (errno, "section has no load op"); |
---|
614 | return false; |
---|
615 | } |
---|
616 | |
---|
617 | base_offset += sect->size; |
---|
618 | first = false; |
---|
619 | } |
---|
620 | |
---|
621 | node = rtems_chain_next (node); |
---|
622 | } |
---|
623 | |
---|
624 | return true; |
---|
625 | } |
---|
626 | |
---|
627 | bool |
---|
628 | rtems_rtl_obj_load_sections (rtems_rtl_obj_t* obj, |
---|
629 | int fd, |
---|
630 | rtems_rtl_obj_sect_handler_t handler, |
---|
631 | void* data) |
---|
632 | { |
---|
633 | size_t text_size; |
---|
634 | size_t const_size; |
---|
635 | size_t data_size; |
---|
636 | size_t bss_size; |
---|
637 | |
---|
638 | text_size = rtems_rtl_obj_text_size (obj) + rtems_rtl_obj_const_alignment (obj); |
---|
639 | const_size = rtems_rtl_obj_const_size (obj) + rtems_rtl_obj_data_alignment (obj); |
---|
640 | data_size = rtems_rtl_obj_data_size (obj) + rtems_rtl_obj_bss_alignment (obj); |
---|
641 | bss_size = rtems_rtl_obj_bss_size (obj); |
---|
642 | |
---|
643 | /* |
---|
644 | * Let the allocator manage the actual allocation. The user can use the |
---|
645 | * standard heap or provide a specific allocator with memory protection. |
---|
646 | */ |
---|
647 | if (!rtems_rtl_alloc_module_new (&obj->text_base, text_size, |
---|
648 | &obj->const_base, const_size, |
---|
649 | &obj->data_base, data_size, |
---|
650 | &obj->bss_base, bss_size)) |
---|
651 | { |
---|
652 | obj->exec_size = 0; |
---|
653 | rtems_rtl_set_error (ENOMEM, "no memory to load obj"); |
---|
654 | return false; |
---|
655 | } |
---|
656 | |
---|
657 | obj->exec_size = text_size + const_size + data_size + bss_size; |
---|
658 | |
---|
659 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_LOAD_SECT)) |
---|
660 | { |
---|
661 | printf ("rtl: load sect: text - b:%p s:%zi a:%" PRIu32 "\n", |
---|
662 | obj->text_base, text_size, rtems_rtl_obj_text_alignment (obj)); |
---|
663 | printf ("rtl: load sect: const - b:%p s:%zi a:%" PRIu32 "\n", |
---|
664 | obj->const_base, const_size, rtems_rtl_obj_const_alignment (obj)); |
---|
665 | printf ("rtl: load sect: data - b:%p s:%zi a:%" PRIu32 "\n", |
---|
666 | obj->data_base, data_size, rtems_rtl_obj_data_alignment (obj)); |
---|
667 | printf ("rtl: load sect: bss - b:%p s:%zi a:%" PRIu32 "\n", |
---|
668 | obj->bss_base, bss_size, rtems_rtl_obj_bss_alignment (obj)); |
---|
669 | } |
---|
670 | |
---|
671 | /* |
---|
672 | * Load all text then data then bss sections in seperate operations so each |
---|
673 | * type of section is grouped together. |
---|
674 | */ |
---|
675 | if (!rtems_rtl_obj_sections_loader (RTEMS_RTL_OBJ_SECT_TEXT, |
---|
676 | obj, fd, obj->text_base, handler, data) || |
---|
677 | !rtems_rtl_obj_sections_loader (RTEMS_RTL_OBJ_SECT_CONST, |
---|
678 | obj, fd, obj->const_base, handler, data) || |
---|
679 | !rtems_rtl_obj_sections_loader (RTEMS_RTL_OBJ_SECT_DATA, |
---|
680 | obj, fd, obj->data_base, handler, data) || |
---|
681 | !rtems_rtl_obj_sections_loader (RTEMS_RTL_OBJ_SECT_BSS, |
---|
682 | obj, fd, obj->bss_base, handler, data)) |
---|
683 | { |
---|
684 | rtems_rtl_alloc_module_del (&obj->text_base, &obj->const_base, |
---|
685 | &obj->data_base, &obj->bss_base); |
---|
686 | obj->exec_size = 0; |
---|
687 | return false; |
---|
688 | } |
---|
689 | |
---|
690 | return true; |
---|
691 | } |
---|
692 | |
---|
693 | static void |
---|
694 | rtems_rtl_obj_run_cdtors (rtems_rtl_obj_t* obj, uint32_t mask) |
---|
695 | { |
---|
696 | rtems_chain_node* node = rtems_chain_first (&obj->sections); |
---|
697 | while (!rtems_chain_is_tail (&obj->sections, node)) |
---|
698 | { |
---|
699 | rtems_rtl_obj_sect_t* sect = (rtems_rtl_obj_sect_t*) node; |
---|
700 | if ((sect->flags & mask) == mask) |
---|
701 | { |
---|
702 | rtems_rtl_cdtor_t* handler; |
---|
703 | size_t handlers = sect->size / sizeof (rtems_rtl_cdtor_t); |
---|
704 | int c; |
---|
705 | for (c = 0, handler = sect->base; c < handlers; ++c) |
---|
706 | if (*handler) |
---|
707 | (*handler) (); |
---|
708 | } |
---|
709 | node = rtems_chain_next (node); |
---|
710 | } |
---|
711 | } |
---|
712 | |
---|
713 | void |
---|
714 | rtems_rtl_obj_run_ctors (rtems_rtl_obj_t* obj) |
---|
715 | { |
---|
716 | return rtems_rtl_obj_run_cdtors (obj, RTEMS_RTL_OBJ_SECT_CTOR); |
---|
717 | } |
---|
718 | |
---|
719 | void |
---|
720 | rtems_rtl_obj_run_dtors (rtems_rtl_obj_t* obj) |
---|
721 | { |
---|
722 | return rtems_rtl_obj_run_cdtors (obj, RTEMS_RTL_OBJ_SECT_DTOR); |
---|
723 | } |
---|
724 | |
---|
725 | /** |
---|
726 | * Find a module in an archive returning the offset in the archive in the |
---|
727 | * object descriptor. |
---|
728 | */ |
---|
729 | static bool |
---|
730 | rtems_rtl_obj_archive_find (rtems_rtl_obj_t* obj, int fd) |
---|
731 | { |
---|
732 | #define RTEMS_RTL_AR_IDENT "!<arch>\n" |
---|
733 | #define RTEMS_RTL_AR_IDENT_SIZE (sizeof (RTEMS_RTL_AR_IDENT) - 1) |
---|
734 | #define RTEMS_RTL_AR_FHDR_BASE RTEMS_RTL_AR_IDENT_SIZE |
---|
735 | #define RTEMS_RTL_AR_FNAME (0) |
---|
736 | #define RTEMS_RTL_AR_FNAME_SIZE (16) |
---|
737 | #define RTEMS_RTL_AR_SIZE (48) |
---|
738 | #define RTEMS_RTL_AR_SIZE_SIZE (10) |
---|
739 | #define RTEMS_RTL_AR_MAGIC (58) |
---|
740 | #define RTEMS_RTL_AR_MAGIC_SIZE (2) |
---|
741 | #define RTEMS_RTL_AR_FHDR_SIZE (60) |
---|
742 | |
---|
743 | size_t fsize = obj->fsize; |
---|
744 | off_t extended_file_names; |
---|
745 | uint8_t header[RTEMS_RTL_AR_FHDR_SIZE]; |
---|
746 | bool scanning; |
---|
747 | |
---|
748 | if (read (fd, &header[0], RTEMS_RTL_AR_IDENT_SIZE) != RTEMS_RTL_AR_IDENT_SIZE) |
---|
749 | { |
---|
750 | rtems_rtl_set_error (errno, "reading archive identifer"); |
---|
751 | return false; |
---|
752 | } |
---|
753 | |
---|
754 | if (memcmp (header, RTEMS_RTL_AR_IDENT, RTEMS_RTL_AR_IDENT_SIZE) != 0) |
---|
755 | { |
---|
756 | rtems_rtl_set_error (EINVAL, "invalid archive identifer"); |
---|
757 | return false; |
---|
758 | } |
---|
759 | |
---|
760 | /* |
---|
761 | * Seek to the current offset in the archive and if we have a valid archive |
---|
762 | * file header present check the file name for a match with the oname field |
---|
763 | * of the object descriptor. If the archive header is not valid and it is the |
---|
764 | * first pass reset the offset and start the search again in case the offset |
---|
765 | * provided is not valid any more. |
---|
766 | * |
---|
767 | * The archive can have a symbol table at the start. Ignore it. A symbol |
---|
768 | * table has the file name '/'. |
---|
769 | * |
---|
770 | * The archive can also have the GNU extended file name table. This |
---|
771 | * complicates the processing. If the object's file name starts with '/' the |
---|
772 | * remainder of the file name is an offset into the extended file name |
---|
773 | * table. To find the extended file name table we need to scan from start of |
---|
774 | * the archive for a file name of '//'. Once found we remeber the table's |
---|
775 | * start and can direct seek to file name location. In other words the scan |
---|
776 | * only happens once. |
---|
777 | * |
---|
778 | * If the name had the offset encoded we go straight to that location. |
---|
779 | */ |
---|
780 | |
---|
781 | if (obj->ooffset != 0) |
---|
782 | scanning = false; |
---|
783 | else |
---|
784 | { |
---|
785 | scanning = true; |
---|
786 | obj->ooffset = RTEMS_RTL_AR_FHDR_BASE; |
---|
787 | } |
---|
788 | |
---|
789 | extended_file_names = 0; |
---|
790 | |
---|
791 | while (obj->ooffset < fsize) |
---|
792 | { |
---|
793 | /* |
---|
794 | * Clean up any existing data. |
---|
795 | */ |
---|
796 | memset (header, 0, sizeof (header)); |
---|
797 | |
---|
798 | if (!rtems_rtl_seek_read (fd, obj->ooffset, RTEMS_RTL_AR_FHDR_SIZE, &header[0])) |
---|
799 | { |
---|
800 | rtems_rtl_set_error (errno, "seek/read archive file header"); |
---|
801 | obj->ooffset = 0; |
---|
802 | obj->fsize = 0; |
---|
803 | return false; |
---|
804 | } |
---|
805 | |
---|
806 | if ((header[RTEMS_RTL_AR_MAGIC] != 0x60) || |
---|
807 | (header[RTEMS_RTL_AR_MAGIC + 1] != 0x0a)) |
---|
808 | { |
---|
809 | if (scanning) |
---|
810 | { |
---|
811 | rtems_rtl_set_error (EINVAL, "invalid archive file header"); |
---|
812 | obj->ooffset = 0; |
---|
813 | obj->fsize = 0; |
---|
814 | return false; |
---|
815 | } |
---|
816 | |
---|
817 | scanning = true; |
---|
818 | obj->ooffset = RTEMS_RTL_AR_FHDR_BASE; |
---|
819 | continue; |
---|
820 | } |
---|
821 | |
---|
822 | /* |
---|
823 | * The archive header is always aligned to an even address. |
---|
824 | */ |
---|
825 | obj->fsize = (rtems_rtl_scan_decimal (&header[RTEMS_RTL_AR_SIZE], |
---|
826 | RTEMS_RTL_AR_SIZE_SIZE) + 1) & ~1; |
---|
827 | |
---|
828 | /* |
---|
829 | * Check for the GNU extensions. |
---|
830 | */ |
---|
831 | if (header[0] == '/') |
---|
832 | { |
---|
833 | off_t extended_off; |
---|
834 | |
---|
835 | switch (header[1]) |
---|
836 | { |
---|
837 | case ' ': |
---|
838 | /* |
---|
839 | * Symbols table. Ignore the table. |
---|
840 | */ |
---|
841 | break; |
---|
842 | case '/': |
---|
843 | /* |
---|
844 | * Extended file names table. Remember. |
---|
845 | */ |
---|
846 | extended_file_names = obj->ooffset + RTEMS_RTL_AR_FHDR_SIZE; |
---|
847 | break; |
---|
848 | case '0': |
---|
849 | case '1': |
---|
850 | case '2': |
---|
851 | case '3': |
---|
852 | case '4': |
---|
853 | case '5': |
---|
854 | case '6': |
---|
855 | case '7': |
---|
856 | case '8': |
---|
857 | case '9': |
---|
858 | /* |
---|
859 | * Offset into the extended file name table. If we do not have the |
---|
860 | * offset to the extended file name table find it. |
---|
861 | */ |
---|
862 | extended_off = |
---|
863 | rtems_rtl_scan_decimal (&header[1], RTEMS_RTL_AR_FNAME_SIZE); |
---|
864 | |
---|
865 | if (extended_file_names == 0) |
---|
866 | { |
---|
867 | off_t off = obj->ooffset; |
---|
868 | while (extended_file_names == 0) |
---|
869 | { |
---|
870 | off_t esize = |
---|
871 | (rtems_rtl_scan_decimal (&header[RTEMS_RTL_AR_SIZE], |
---|
872 | RTEMS_RTL_AR_SIZE_SIZE) + 1) & ~1; |
---|
873 | off += esize + RTEMS_RTL_AR_FHDR_SIZE; |
---|
874 | |
---|
875 | if (!rtems_rtl_seek_read (fd, off, |
---|
876 | RTEMS_RTL_AR_FHDR_SIZE, &header[0])) |
---|
877 | { |
---|
878 | rtems_rtl_set_error (errno, |
---|
879 | "seeking/reading archive ext file name header"); |
---|
880 | obj->ooffset = 0; |
---|
881 | obj->fsize = 0; |
---|
882 | return false; |
---|
883 | } |
---|
884 | |
---|
885 | if ((header[RTEMS_RTL_AR_MAGIC] != 0x60) || |
---|
886 | (header[RTEMS_RTL_AR_MAGIC + 1] != 0x0a)) |
---|
887 | { |
---|
888 | rtems_rtl_set_error (errno, "invalid archive file header"); |
---|
889 | obj->ooffset = 0; |
---|
890 | obj->fsize = 0; |
---|
891 | return false; |
---|
892 | } |
---|
893 | |
---|
894 | if ((header[0] == '/') && (header[1] == '/')) |
---|
895 | { |
---|
896 | extended_file_names = off + RTEMS_RTL_AR_FHDR_SIZE; |
---|
897 | break; |
---|
898 | } |
---|
899 | } |
---|
900 | } |
---|
901 | |
---|
902 | if (extended_file_names) |
---|
903 | { |
---|
904 | /* |
---|
905 | * We know the offset in the archive to the extended file. Read the |
---|
906 | * name from the table and compare with the name we are after. |
---|
907 | */ |
---|
908 | #define RTEMS_RTL_MAX_FILE_SIZE (256) |
---|
909 | char name[RTEMS_RTL_MAX_FILE_SIZE]; |
---|
910 | |
---|
911 | if (!rtems_rtl_seek_read (fd, extended_file_names + extended_off, |
---|
912 | RTEMS_RTL_MAX_FILE_SIZE, (uint8_t*) &name[0])) |
---|
913 | { |
---|
914 | rtems_rtl_set_error (errno, |
---|
915 | "invalid archive ext file seek/read"); |
---|
916 | obj->ooffset = 0; |
---|
917 | obj->fsize = 0; |
---|
918 | return false; |
---|
919 | } |
---|
920 | |
---|
921 | if (rtems_rtl_match_name (obj, name)) |
---|
922 | { |
---|
923 | obj->ooffset += RTEMS_RTL_AR_FHDR_SIZE; |
---|
924 | return true; |
---|
925 | } |
---|
926 | } |
---|
927 | break; |
---|
928 | default: |
---|
929 | /* |
---|
930 | * Ignore the file because we do not know what it it. |
---|
931 | */ |
---|
932 | break; |
---|
933 | } |
---|
934 | } |
---|
935 | else |
---|
936 | { |
---|
937 | if (rtems_rtl_match_name (obj, (const char*) &header[RTEMS_RTL_AR_FNAME])) |
---|
938 | { |
---|
939 | obj->ooffset += RTEMS_RTL_AR_FHDR_SIZE; |
---|
940 | return true; |
---|
941 | } |
---|
942 | } |
---|
943 | |
---|
944 | obj->ooffset += obj->fsize + RTEMS_RTL_AR_FHDR_SIZE; |
---|
945 | } |
---|
946 | |
---|
947 | rtems_rtl_set_error (ENOENT, "object file not found"); |
---|
948 | obj->ooffset = 0; |
---|
949 | obj->fsize = 0; |
---|
950 | return false; |
---|
951 | } |
---|
952 | |
---|
953 | bool |
---|
954 | rtems_rtl_obj_file_load (rtems_rtl_obj_t* obj, int fd) |
---|
955 | { |
---|
956 | int l; |
---|
957 | |
---|
958 | for (l = 0; l < (sizeof (loaders) / sizeof (rtems_rtl_loader_table_t)); ++l) |
---|
959 | { |
---|
960 | if (loaders[l].check (obj, fd)) |
---|
961 | return loaders[l].load (obj, fd); |
---|
962 | } |
---|
963 | |
---|
964 | rtems_rtl_set_error (ENOENT, "no format loader found"); |
---|
965 | return false; |
---|
966 | } |
---|
967 | |
---|
968 | bool |
---|
969 | rtems_rtl_obj_load (rtems_rtl_obj_t* obj) |
---|
970 | { |
---|
971 | int fd; |
---|
972 | |
---|
973 | if (!rtems_rtl_obj_fname_valid (obj)) |
---|
974 | { |
---|
975 | rtems_rtl_set_error (ENOMEM, "invalid object file name path"); |
---|
976 | return false; |
---|
977 | } |
---|
978 | |
---|
979 | fd = open (rtems_rtl_obj_fname (obj), O_RDONLY); |
---|
980 | if (fd < 0) |
---|
981 | { |
---|
982 | rtems_rtl_set_error (ENOMEM, "opening for object file"); |
---|
983 | return false; |
---|
984 | } |
---|
985 | |
---|
986 | /* |
---|
987 | * Find the object file in the archive if it is an archive that |
---|
988 | * has been opened. |
---|
989 | */ |
---|
990 | if (rtems_rtl_obj_aname_valid (obj)) |
---|
991 | { |
---|
992 | if (!rtems_rtl_obj_archive_find (obj, fd)) |
---|
993 | { |
---|
994 | rtems_rtl_obj_caches_flush (); |
---|
995 | close (fd); |
---|
996 | return false; |
---|
997 | } |
---|
998 | } |
---|
999 | |
---|
1000 | /* |
---|
1001 | * Call the format specific loader. Currently this is a call to the ELF |
---|
1002 | * loader. This call could be changed to allow probes then calls if more than |
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1003 | * one format is supported. |
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1004 | */ |
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1005 | if (!rtems_rtl_obj_file_load (obj, fd)) |
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1006 | { |
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1007 | rtems_rtl_obj_caches_flush (); |
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1008 | close (fd); |
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1009 | return false; |
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1010 | } |
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1011 | |
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1012 | if (!_rtld_linkmap_add (obj)) /* For GDB */ |
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1013 | { |
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1014 | close (fd); |
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1015 | return false; |
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1016 | } |
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1017 | |
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1018 | rtems_rtl_obj_caches_flush (); |
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1019 | |
---|
1020 | close (fd); |
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1021 | |
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1022 | return true; |
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1023 | } |
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1024 | |
---|
1025 | bool |
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1026 | rtems_rtl_obj_unload (rtems_rtl_obj_t* obj) |
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1027 | { |
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1028 | _rtld_linkmap_delete(obj); |
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1029 | rtems_rtl_symbol_obj_erase (obj); |
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1030 | return rtems_rtl_obj_free (obj); |
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1031 | } |
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