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.org/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 rtems_rtl |
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12 | * |
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13 | * @brief RTEMS Run-Time Linker Allocator |
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14 | */ |
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15 | |
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16 | #include <stdio.h> |
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17 | |
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18 | #include <rtems/rtl/rtl.h> |
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19 | #include "rtl-alloc-heap.h" |
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20 | #include "rtl-trace.h" |
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21 | |
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22 | /** |
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23 | * Tags as symbols for tracing. |
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24 | */ |
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25 | #if RTEMS_RTL_TRACE |
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26 | static const char* tag_labels[6] = |
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27 | { |
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28 | "OBJECT", |
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29 | "SYMBOL", |
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30 | "EXTERNAL", |
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31 | "READ", |
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32 | "READ_WRITE", |
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33 | "READ_EXEC", |
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34 | }; |
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35 | #define rtems_rtl_trace_tag_label(_l) tag_labels[_l] |
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36 | #else |
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37 | #define rtems_rtl_trace_tag_label(_l) "" |
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38 | #endif |
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39 | |
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40 | void |
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41 | rtems_rtl_alloc_initialise (rtems_rtl_alloc_data_t* data) |
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42 | { |
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43 | int c; |
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44 | data->allocator = rtems_rtl_alloc_heap; |
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45 | for (c = 0; c < RTEMS_RTL_ALLOC_TAGS; ++c) |
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46 | rtems_chain_initialize_empty (&data->indirects[c]); |
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47 | } |
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48 | |
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49 | void* |
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50 | rtems_rtl_alloc_new (rtems_rtl_alloc_tag_t tag, size_t size, bool zero) |
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51 | { |
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52 | rtems_rtl_data_t* rtl = rtems_rtl_lock (); |
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53 | void* address = NULL; |
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54 | |
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55 | /* |
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56 | * Obtain memory from the allocator. |
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57 | */ |
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58 | if (rtl) |
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59 | rtl->allocator.allocator (true, tag, &address, size); |
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60 | |
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61 | rtems_rtl_unlock (); |
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62 | |
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63 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_ALLOCATOR)) |
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64 | printf ("rtl: alloc: new: %s addr=%p size=%zu\n", |
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65 | rtems_rtl_trace_tag_label (tag), address, size); |
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66 | |
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67 | /* |
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68 | * Only zero the memory if asked to and the allocation was successful. |
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69 | */ |
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70 | if (address && zero) |
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71 | memset (address, 0, size); |
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72 | |
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73 | return address; |
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74 | } |
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75 | |
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76 | void |
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77 | rtems_rtl_alloc_del (rtems_rtl_alloc_tag_t tag, void* address) |
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78 | { |
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79 | rtems_rtl_data_t* rtl = rtems_rtl_lock (); |
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80 | |
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81 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_ALLOCATOR)) |
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82 | printf ("rtl: alloc: del: %s addr=%p\n", |
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83 | rtems_rtl_trace_tag_label (tag), address); |
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84 | |
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85 | if (rtl && address) |
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86 | rtl->allocator.allocator (false, tag, &address, 0); |
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87 | |
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88 | rtems_rtl_unlock (); |
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89 | } |
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90 | |
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91 | rtems_rtl_allocator_t |
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92 | rtems_rtl_alloc_hook (rtems_rtl_allocator_t handler) |
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93 | { |
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94 | rtems_rtl_data_t* rtl = rtems_rtl_lock (); |
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95 | rtems_rtl_allocator_t previous = rtl->allocator.allocator; |
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96 | rtl->allocator.allocator = handler; |
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97 | rtems_rtl_unlock (); |
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98 | return previous; |
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99 | } |
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100 | |
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101 | void |
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102 | rtems_rtl_alloc_indirect_new (rtems_rtl_alloc_tag_t tag, |
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103 | rtems_rtl_ptr_t* handle, |
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104 | size_t size) |
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105 | { |
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106 | rtems_rtl_data_t* rtl = rtems_rtl_lock (); |
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107 | |
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108 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_ALLOCATOR)) |
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109 | { |
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110 | if (!rtems_rtl_ptr_null (handle)) |
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111 | printf ("rtl: alloc: inew: %s handle=%p: not null\n", |
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112 | rtems_rtl_trace_tag_label (tag), handle); |
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113 | printf ("rtl: alloc: inew: %s handle=%p size=%zd\n", |
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114 | rtems_rtl_trace_tag_label (tag), handle, size); |
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115 | } |
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116 | |
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117 | if (rtl) |
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118 | { |
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119 | rtems_rtl_alloc_data_t* allocator = &rtl->allocator; |
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120 | handle->pointer = rtems_rtl_alloc_new (tag, size, false); |
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121 | if (!rtems_rtl_ptr_null (handle)) |
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122 | rtems_chain_append_unprotected (&allocator->indirects[tag], |
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123 | &handle->node); |
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124 | } |
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125 | |
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126 | rtems_rtl_unlock (); |
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127 | } |
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128 | |
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129 | void |
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130 | rtems_rtl_alloc_indirect_del (rtems_rtl_alloc_tag_t tag, |
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131 | rtems_rtl_ptr_t* handle) |
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132 | { |
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133 | rtems_rtl_data_t* rtl = rtems_rtl_lock (); |
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134 | |
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135 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_ALLOCATOR)) |
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136 | { |
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137 | if (rtems_rtl_ptr_null (handle)) |
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138 | printf ("rtl: alloc: idel: %s handle=%p: is null\n", |
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139 | rtems_rtl_trace_tag_label (tag), handle); |
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140 | printf ("rtl: alloc: idel: %s handle=%p\n", |
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141 | rtems_rtl_trace_tag_label (tag), handle); |
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142 | } |
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143 | |
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144 | if (rtl && !rtems_rtl_ptr_null (handle)) |
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145 | { |
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146 | rtems_chain_extract_unprotected (&handle->node); |
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147 | rtems_rtl_alloc_del (tag, &handle->pointer); |
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148 | } |
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149 | } |
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150 | |
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151 | bool |
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152 | rtems_rtl_alloc_module_new (void** text_base, size_t text_size, |
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153 | void** const_base, size_t const_size, |
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154 | void** data_base, size_t data_size, |
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155 | void** bss_base, size_t bss_size) |
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156 | { |
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157 | *text_base = *const_base = *data_base = *bss_base = NULL; |
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158 | |
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159 | if (text_size) |
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160 | { |
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161 | *text_base = rtems_rtl_alloc_new (RTEMS_RTL_ALLOC_READ_EXEC, |
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162 | text_size, false); |
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163 | if (!*text_base) |
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164 | { |
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165 | return false; |
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166 | } |
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167 | } |
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168 | |
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169 | if (const_size) |
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170 | { |
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171 | *const_base = rtems_rtl_alloc_new (RTEMS_RTL_ALLOC_READ, |
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172 | const_size, false); |
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173 | if (!*const_base) |
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174 | { |
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175 | rtems_rtl_alloc_module_del (text_base, const_base, data_base, bss_base); |
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176 | return false; |
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177 | } |
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178 | } |
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179 | |
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180 | if (data_size) |
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181 | { |
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182 | *data_base = rtems_rtl_alloc_new (RTEMS_RTL_ALLOC_READ_WRITE, |
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183 | data_size, false); |
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184 | if (!*data_base) |
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185 | { |
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186 | rtems_rtl_alloc_module_del (text_base, const_base, data_base, bss_base); |
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187 | return false; |
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188 | } |
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189 | } |
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190 | |
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191 | if (bss_size) |
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192 | { |
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193 | *bss_base = rtems_rtl_alloc_new (RTEMS_RTL_ALLOC_READ_WRITE, |
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194 | bss_size, false); |
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195 | if (!*bss_base) |
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196 | { |
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197 | rtems_rtl_alloc_module_del (text_base, const_base, data_base, bss_base); |
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198 | return false; |
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199 | } |
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200 | } |
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201 | |
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202 | return true; |
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203 | } |
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204 | |
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205 | void |
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206 | rtems_rtl_alloc_module_del (void** text_base, |
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207 | void** const_base, |
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208 | void** data_base, |
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209 | void** bss_base) |
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210 | { |
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211 | rtems_rtl_alloc_del (RTEMS_RTL_ALLOC_READ_WRITE, *bss_base); |
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212 | rtems_rtl_alloc_del (RTEMS_RTL_ALLOC_READ_WRITE, *data_base); |
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213 | rtems_rtl_alloc_del (RTEMS_RTL_ALLOC_READ, *const_base); |
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214 | rtems_rtl_alloc_del (RTEMS_RTL_ALLOC_READ_EXEC, *text_base); |
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215 | *text_base = *const_base = *data_base = *bss_base = NULL; |
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216 | } |
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